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5e6908ea | 1 | /* Output Dwarf2 format symbol table information from GCC. |
69bd9368 | 2 | Copyright (C) 1992, 1993, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, |
e53a16e7 | 3 | 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc. |
e9a25f70 JL |
4 | Contributed by Gary Funck (gary@intrepid.com). |
5 | Derived from DWARF 1 implementation of Ron Guilmette (rfg@monkeys.com). | |
469ac993 | 6 | Extensively modified by Jason Merrill (jason@cygnus.com). |
a3f97cbb | 7 | |
1322177d | 8 | This file is part of GCC. |
a3f97cbb | 9 | |
1322177d LB |
10 | GCC is free software; you can redistribute it and/or modify it under |
11 | the terms of the GNU General Public License as published by the Free | |
12 | Software Foundation; either version 2, or (at your option) any later | |
13 | version. | |
a3f97cbb | 14 | |
1322177d LB |
15 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
16 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
17 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
18 | for more details. | |
a3f97cbb JW |
19 | |
20 | You should have received a copy of the GNU General Public License | |
1322177d | 21 | along with GCC; see the file COPYING. If not, write to the Free |
366ccddb KC |
22 | Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA |
23 | 02110-1301, USA. */ | |
a3f97cbb | 24 | |
9eb4015a | 25 | /* TODO: Emit .debug_line header even when there are no functions, since |
348bb3c7 JM |
26 | the file numbers are used by .debug_info. Alternately, leave |
27 | out locations for types and decls. | |
28 | Avoid talking about ctors and op= for PODs. | |
29 | Factor out common prologue sequences into multiple CIEs. */ | |
30 | ||
3f76745e JM |
31 | /* The first part of this file deals with the DWARF 2 frame unwind |
32 | information, which is also used by the GCC efficient exception handling | |
33 | mechanism. The second part, controlled only by an #ifdef | |
34 | DWARF2_DEBUGGING_INFO, deals with the other DWARF 2 debugging | |
35 | information. */ | |
36 | ||
f01d40db BE |
37 | /* DWARF2 Abbreviation Glossary: |
38 | ||
39 | CFA = Canonical Frame Address | |
40 | a fixed address on the stack which identifies a call frame. | |
41 | We define it to be the value of SP just before the call insn. | |
42 | The CFA register and offset, which may change during the course | |
43 | of the function, are used to calculate its value at runtime. | |
44 | ||
45 | CFI = Call Frame Instruction | |
46 | an instruction for the DWARF2 abstract machine | |
47 | ||
48 | CIE = Common Information Entry | |
49 | information describing information common to one or more FDEs | |
50 | ||
51 | DIE = Debugging Information Entry | |
52 | ||
53 | FDE = Frame Description Entry | |
54 | information describing the stack call frame, in particular, | |
55 | how to restore registers | |
56 | ||
57 | DW_CFA_... = DWARF2 CFA call frame instruction | |
58 | DW_TAG_... = DWARF2 DIE tag */ | |
59 | ||
0021b564 | 60 | #include "config.h" |
670ee920 | 61 | #include "system.h" |
4977bab6 ZW |
62 | #include "coretypes.h" |
63 | #include "tm.h" | |
a3f97cbb | 64 | #include "tree.h" |
a757585a | 65 | #include "version.h" |
a3f97cbb | 66 | #include "flags.h" |
11ad4784 | 67 | #include "real.h" |
a3f97cbb JW |
68 | #include "rtl.h" |
69 | #include "hard-reg-set.h" | |
70 | #include "regs.h" | |
71 | #include "insn-config.h" | |
72 | #include "reload.h" | |
52a11cbf | 73 | #include "function.h" |
a3f97cbb | 74 | #include "output.h" |
71dfc51f | 75 | #include "expr.h" |
e78d8e51 | 76 | #include "libfuncs.h" |
3f76745e | 77 | #include "except.h" |
a7cc7f29 | 78 | #include "dwarf2.h" |
76ead72b | 79 | #include "dwarf2out.h" |
2e4b9b8c | 80 | #include "dwarf2asm.h" |
10f0ad3d | 81 | #include "toplev.h" |
1865dbb5 | 82 | #include "varray.h" |
951a525f | 83 | #include "ggc.h" |
881c6935 | 84 | #include "md5.h" |
57bed152 | 85 | #include "tm_p.h" |
2a2b2d43 | 86 | #include "diagnostic.h" |
a51d908e | 87 | #include "debug.h" |
07c9d2eb | 88 | #include "target.h" |
3ac88239 | 89 | #include "langhooks.h" |
cc0017a9 | 90 | #include "hashtab.h" |
1bb17c21 | 91 | #include "cgraph.h" |
6097b0c3 | 92 | #include "input.h" |
a3f97cbb | 93 | |
653e276c | 94 | #ifdef DWARF2_DEBUGGING_INFO |
7080f735 | 95 | static void dwarf2out_source_line (unsigned int, const char *); |
653e276c NB |
96 | #endif |
97 | ||
658f32fd AO |
98 | #ifndef DWARF2_FRAME_INFO |
99 | # ifdef DWARF2_DEBUGGING_INFO | |
100 | # define DWARF2_FRAME_INFO \ | |
101 | (write_symbols == DWARF2_DEBUG || write_symbols == VMS_AND_DWARF2_DEBUG) | |
102 | # else | |
103 | # define DWARF2_FRAME_INFO 0 | |
104 | # endif | |
105 | #endif | |
106 | ||
fb638355 GK |
107 | /* Map register numbers held in the call frame info that gcc has |
108 | collected using DWARF_FRAME_REGNUM to those that should be output in | |
109 | .debug_frame and .eh_frame. */ | |
110 | #ifndef DWARF2_FRAME_REG_OUT | |
111 | #define DWARF2_FRAME_REG_OUT(REGNO, FOR_EH) (REGNO) | |
112 | #endif | |
113 | ||
0021b564 JM |
114 | /* Decide whether we want to emit frame unwind information for the current |
115 | translation unit. */ | |
116 | ||
117 | int | |
7080f735 | 118 | dwarf2out_do_frame (void) |
0021b564 | 119 | { |
658f32fd AO |
120 | /* We want to emit correct CFA location expressions or lists, so we |
121 | have to return true if we're going to output debug info, even if | |
122 | we're not going to output frame or unwind info. */ | |
0021b564 | 123 | return (write_symbols == DWARF2_DEBUG |
7a0c8d71 | 124 | || write_symbols == VMS_AND_DWARF2_DEBUG |
556273e0 | 125 | || DWARF2_FRAME_INFO |
0021b564 | 126 | #ifdef DWARF2_UNWIND_INFO |
658f32fd AO |
127 | || (DWARF2_UNWIND_INFO |
128 | && (flag_unwind_tables | |
129 | || (flag_exceptions && ! USING_SJLJ_EXCEPTIONS))) | |
0021b564 JM |
130 | #endif |
131 | ); | |
132 | } | |
133 | ||
f3a8e4f5 KG |
134 | /* The size of the target's pointer type. */ |
135 | #ifndef PTR_SIZE | |
136 | #define PTR_SIZE (POINTER_SIZE / BITS_PER_UNIT) | |
137 | #endif | |
138 | ||
e2500fed GK |
139 | /* Array of RTXes referenced by the debugging information, which therefore |
140 | must be kept around forever. */ | |
a1bbd445 | 141 | static GTY(()) VEC(rtx,gc) *used_rtx_array; |
e2500fed GK |
142 | |
143 | /* A pointer to the base of a list of incomplete types which might be | |
887fb69b KH |
144 | completed at some later time. incomplete_types_list needs to be a |
145 | VEC(tree,gc) because we want to tell the garbage collector about | |
146 | it. */ | |
147 | static GTY(()) VEC(tree,gc) *incomplete_types; | |
e2500fed GK |
148 | |
149 | /* A pointer to the base of a table of references to declaration | |
150 | scopes. This table is a display which tracks the nesting | |
151 | of declaration scopes at the current scope and containing | |
152 | scopes. This table is used to find the proper place to | |
153 | define type declaration DIE's. */ | |
0fdc587b | 154 | static GTY(()) VEC(tree,gc) *decl_scope_table; |
e2500fed | 155 | |
d6b5193b RS |
156 | /* Pointers to various DWARF2 sections. */ |
157 | static GTY(()) section *debug_info_section; | |
158 | static GTY(()) section *debug_abbrev_section; | |
159 | static GTY(()) section *debug_aranges_section; | |
160 | static GTY(()) section *debug_macinfo_section; | |
161 | static GTY(()) section *debug_line_section; | |
162 | static GTY(()) section *debug_loc_section; | |
163 | static GTY(()) section *debug_pubnames_section; | |
89708594 | 164 | static GTY(()) section *debug_pubtypes_section; |
d6b5193b RS |
165 | static GTY(()) section *debug_str_section; |
166 | static GTY(()) section *debug_ranges_section; | |
192d0f89 | 167 | static GTY(()) section *debug_frame_section; |
d6b5193b | 168 | |
eaf95893 RK |
169 | /* How to start an assembler comment. */ |
170 | #ifndef ASM_COMMENT_START | |
171 | #define ASM_COMMENT_START ";#" | |
172 | #endif | |
173 | ||
a3f97cbb JW |
174 | typedef struct dw_cfi_struct *dw_cfi_ref; |
175 | typedef struct dw_fde_struct *dw_fde_ref; | |
176 | typedef union dw_cfi_oprnd_struct *dw_cfi_oprnd_ref; | |
a3f97cbb JW |
177 | |
178 | /* Call frames are described using a sequence of Call Frame | |
179 | Information instructions. The register number, offset | |
180 | and address fields are provided as possible operands; | |
181 | their use is selected by the opcode field. */ | |
71dfc51f | 182 | |
17211ab5 GK |
183 | enum dw_cfi_oprnd_type { |
184 | dw_cfi_oprnd_unused, | |
185 | dw_cfi_oprnd_reg_num, | |
186 | dw_cfi_oprnd_offset, | |
187 | dw_cfi_oprnd_addr, | |
188 | dw_cfi_oprnd_loc | |
189 | }; | |
190 | ||
191 | typedef union dw_cfi_oprnd_struct GTY(()) | |
71dfc51f | 192 | { |
f6672e8e | 193 | unsigned int GTY ((tag ("dw_cfi_oprnd_reg_num"))) dw_cfi_reg_num; |
799f628a | 194 | HOST_WIDE_INT GTY ((tag ("dw_cfi_oprnd_offset"))) dw_cfi_offset; |
17211ab5 GK |
195 | const char * GTY ((tag ("dw_cfi_oprnd_addr"))) dw_cfi_addr; |
196 | struct dw_loc_descr_struct * GTY ((tag ("dw_cfi_oprnd_loc"))) dw_cfi_loc; | |
71dfc51f | 197 | } |
a3f97cbb JW |
198 | dw_cfi_oprnd; |
199 | ||
17211ab5 | 200 | typedef struct dw_cfi_struct GTY(()) |
71dfc51f RK |
201 | { |
202 | dw_cfi_ref dw_cfi_next; | |
203 | enum dwarf_call_frame_info dw_cfi_opc; | |
7080f735 | 204 | dw_cfi_oprnd GTY ((desc ("dw_cfi_oprnd1_desc (%1.dw_cfi_opc)"))) |
17211ab5 | 205 | dw_cfi_oprnd1; |
7080f735 | 206 | dw_cfi_oprnd GTY ((desc ("dw_cfi_oprnd2_desc (%1.dw_cfi_opc)"))) |
17211ab5 | 207 | dw_cfi_oprnd2; |
71dfc51f | 208 | } |
a3f97cbb JW |
209 | dw_cfi_node; |
210 | ||
7d9d8943 AM |
211 | /* This is how we define the location of the CFA. We use to handle it |
212 | as REG + OFFSET all the time, but now it can be more complex. | |
213 | It can now be either REG + CFA_OFFSET or *(REG + BASE_OFFSET) + CFA_OFFSET. | |
556273e0 | 214 | Instead of passing around REG and OFFSET, we pass a copy |
7d9d8943 | 215 | of this structure. */ |
17211ab5 | 216 | typedef struct cfa_loc GTY(()) |
7d9d8943 | 217 | { |
799f628a JH |
218 | HOST_WIDE_INT offset; |
219 | HOST_WIDE_INT base_offset; | |
30e6f306 | 220 | unsigned int reg; |
7d9d8943 AM |
221 | int indirect; /* 1 if CFA is accessed via a dereference. */ |
222 | } dw_cfa_location; | |
223 | ||
a3f97cbb | 224 | /* All call frame descriptions (FDE's) in the GCC generated DWARF |
4b674448 | 225 | refer to a single Common Information Entry (CIE), defined at |
fb530c07 | 226 | the beginning of the .debug_frame section. This use of a single |
a3f97cbb JW |
227 | CIE obviates the need to keep track of multiple CIE's |
228 | in the DWARF generation routines below. */ | |
71dfc51f | 229 | |
17211ab5 | 230 | typedef struct dw_fde_struct GTY(()) |
71dfc51f | 231 | { |
4746cf84 | 232 | tree decl; |
d3e3972c KG |
233 | const char *dw_fde_begin; |
234 | const char *dw_fde_current_label; | |
235 | const char *dw_fde_end; | |
87c8b4be CT |
236 | const char *dw_fde_hot_section_label; |
237 | const char *dw_fde_hot_section_end_label; | |
238 | const char *dw_fde_unlikely_section_label; | |
239 | const char *dw_fde_unlikely_section_end_label; | |
240 | bool dw_fde_switched_sections; | |
71dfc51f | 241 | dw_cfi_ref dw_fde_cfi; |
52a11cbf | 242 | unsigned funcdef_number; |
b6128b8c | 243 | unsigned all_throwers_are_sibcalls : 1; |
52a11cbf RH |
244 | unsigned nothrow : 1; |
245 | unsigned uses_eh_lsda : 1; | |
71dfc51f | 246 | } |
a3f97cbb JW |
247 | dw_fde_node; |
248 | ||
6d2f8887 | 249 | /* Maximum size (in bytes) of an artificially generated label. */ |
a3f97cbb JW |
250 | #define MAX_ARTIFICIAL_LABEL_BYTES 30 |
251 | ||
a1a4189d JB |
252 | /* The size of addresses as they appear in the Dwarf 2 data. |
253 | Some architectures use word addresses to refer to code locations, | |
254 | but Dwarf 2 info always uses byte addresses. On such machines, | |
255 | Dwarf 2 addresses need to be larger than the architecture's | |
256 | pointers. */ | |
257 | #ifndef DWARF2_ADDR_SIZE | |
258 | #define DWARF2_ADDR_SIZE (POINTER_SIZE / BITS_PER_UNIT) | |
259 | #endif | |
260 | ||
7e23cb16 | 261 | /* The size in bytes of a DWARF field indicating an offset or length |
a1a4189d JB |
262 | relative to a debug info section, specified to be 4 bytes in the |
263 | DWARF-2 specification. The SGI/MIPS ABI defines it to be the same | |
b13fe8bf | 264 | as PTR_SIZE. */ |
71dfc51f | 265 | |
7e23cb16 JM |
266 | #ifndef DWARF_OFFSET_SIZE |
267 | #define DWARF_OFFSET_SIZE 4 | |
268 | #endif | |
269 | ||
9eb0ef7a KB |
270 | /* According to the (draft) DWARF 3 specification, the initial length |
271 | should either be 4 or 12 bytes. When it's 12 bytes, the first 4 | |
272 | bytes are 0xffffffff, followed by the length stored in the next 8 | |
273 | bytes. | |
274 | ||
275 | However, the SGI/MIPS ABI uses an initial length which is equal to | |
276 | DWARF_OFFSET_SIZE. It is defined (elsewhere) accordingly. */ | |
277 | ||
278 | #ifndef DWARF_INITIAL_LENGTH_SIZE | |
279 | #define DWARF_INITIAL_LENGTH_SIZE (DWARF_OFFSET_SIZE == 4 ? 4 : 12) | |
280 | #endif | |
281 | ||
9a666dda JM |
282 | #define DWARF_VERSION 2 |
283 | ||
7e23cb16 JM |
284 | /* Round SIZE up to the nearest BOUNDARY. */ |
285 | #define DWARF_ROUND(SIZE,BOUNDARY) \ | |
262b6384 | 286 | ((((SIZE) + (BOUNDARY) - 1) / (BOUNDARY)) * (BOUNDARY)) |
a3f97cbb | 287 | |
a3f97cbb | 288 | /* Offsets recorded in opcodes are a multiple of this alignment factor. */ |
27c35f4b | 289 | #ifndef DWARF_CIE_DATA_ALIGNMENT |
469ac993 | 290 | #ifdef STACK_GROWS_DOWNWARD |
08cb3d38 | 291 | #define DWARF_CIE_DATA_ALIGNMENT (-((int) UNITS_PER_WORD)) |
469ac993 | 292 | #else |
08cb3d38 | 293 | #define DWARF_CIE_DATA_ALIGNMENT ((int) UNITS_PER_WORD) |
469ac993 | 294 | #endif |
2ad9852d | 295 | #endif |
a3f97cbb | 296 | |
0c33762a JM |
297 | /* CIE identifier. */ |
298 | #if HOST_BITS_PER_WIDE_INT >= 64 | |
299 | #define DWARF_CIE_ID \ | |
300 | (unsigned HOST_WIDE_INT) (DWARF_OFFSET_SIZE == 4 ? DW_CIE_ID : DW64_CIE_ID) | |
301 | #else | |
302 | #define DWARF_CIE_ID DW_CIE_ID | |
303 | #endif | |
304 | ||
3f76745e JM |
305 | /* A pointer to the base of a table that contains frame description |
306 | information for each routine. */ | |
17211ab5 | 307 | static GTY((length ("fde_table_allocated"))) dw_fde_ref fde_table; |
a3f97cbb | 308 | |
3f76745e | 309 | /* Number of elements currently allocated for fde_table. */ |
c2e9147c | 310 | static GTY(()) unsigned fde_table_allocated; |
a94dbf2c | 311 | |
3f76745e | 312 | /* Number of elements in fde_table currently in use. */ |
044b4de3 | 313 | static GTY(()) unsigned fde_table_in_use; |
a3f97cbb | 314 | |
3f76745e JM |
315 | /* Size (in elements) of increments by which we may expand the |
316 | fde_table. */ | |
317 | #define FDE_TABLE_INCREMENT 256 | |
a3f97cbb | 318 | |
a94dbf2c | 319 | /* A list of call frame insns for the CIE. */ |
17211ab5 | 320 | static GTY(()) dw_cfi_ref cie_cfi_head; |
a94dbf2c | 321 | |
c1b50e49 | 322 | #if defined (DWARF2_DEBUGGING_INFO) || defined (DWARF2_UNWIND_INFO) |
a3f97cbb JW |
323 | /* Some DWARF extensions (e.g., MIPS/SGI) implement a subprogram |
324 | attribute that accelerates the lookup of the FDE associated | |
556273e0 | 325 | with the subprogram. This variable holds the table index of the FDE |
a3f97cbb JW |
326 | associated with the current function (body) definition. */ |
327 | static unsigned current_funcdef_fde; | |
c1b50e49 | 328 | #endif |
a3f97cbb | 329 | |
17211ab5 | 330 | struct indirect_string_node GTY(()) |
9eb4015a | 331 | { |
17211ab5 | 332 | const char *str; |
9eb4015a JJ |
333 | unsigned int refcount; |
334 | unsigned int form; | |
335 | char *label; | |
336 | }; | |
337 | ||
17211ab5 GK |
338 | static GTY ((param_is (struct indirect_string_node))) htab_t debug_str_hash; |
339 | ||
340 | static GTY(()) int dw2_string_counter; | |
044b4de3 | 341 | static GTY(()) unsigned long dwarf2out_cfi_label_num; |
17211ab5 GK |
342 | |
343 | #if defined (DWARF2_DEBUGGING_INFO) || defined (DWARF2_UNWIND_INFO) | |
344 | ||
a3f97cbb | 345 | /* Forward declarations for functions defined in this file. */ |
71dfc51f | 346 | |
7080f735 AJ |
347 | static char *stripattributes (const char *); |
348 | static const char *dwarf_cfi_name (unsigned); | |
349 | static dw_cfi_ref new_cfi (void); | |
350 | static void add_cfi (dw_cfi_ref *, dw_cfi_ref); | |
351 | static void add_fde_cfi (const char *, dw_cfi_ref); | |
352 | static void lookup_cfa_1 (dw_cfi_ref, dw_cfa_location *); | |
353 | static void lookup_cfa (dw_cfa_location *); | |
799f628a | 354 | static void reg_save (const char *, unsigned, unsigned, HOST_WIDE_INT); |
36bd4303 | 355 | #ifdef DWARF2_UNWIND_INFO |
7080f735 | 356 | static void initial_return_save (rtx); |
36bd4303 | 357 | #endif |
799f628a | 358 | static HOST_WIDE_INT stack_adjust_offset (rtx); |
7080f735 AJ |
359 | static void output_cfi (dw_cfi_ref, dw_fde_ref, int); |
360 | static void output_call_frame_info (int); | |
e0c0490b | 361 | static void dwarf2out_stack_adjust (rtx, bool); |
7080f735 AJ |
362 | static void flush_queued_reg_saves (void); |
363 | static bool clobbers_queued_reg_save (rtx); | |
364 | static void dwarf2out_frame_debug_expr (rtx, const char *); | |
a3f97cbb | 365 | |
7d9d8943 | 366 | /* Support for complex CFA locations. */ |
7080f735 AJ |
367 | static void output_cfa_loc (dw_cfi_ref); |
368 | static void get_cfa_from_loc_descr (dw_cfa_location *, | |
369 | struct dw_loc_descr_struct *); | |
7d9d8943 | 370 | static struct dw_loc_descr_struct *build_cfa_loc |
35d177a2 | 371 | (dw_cfa_location *, HOST_WIDE_INT); |
7080f735 | 372 | static void def_cfa_1 (const char *, dw_cfa_location *); |
7d9d8943 | 373 | |
2e4b9b8c RH |
374 | /* How to start an assembler comment. */ |
375 | #ifndef ASM_COMMENT_START | |
376 | #define ASM_COMMENT_START ";#" | |
a3f97cbb JW |
377 | #endif |
378 | ||
7e23cb16 JM |
379 | /* Data and reference forms for relocatable data. */ |
380 | #define DW_FORM_data (DWARF_OFFSET_SIZE == 8 ? DW_FORM_data8 : DW_FORM_data4) | |
381 | #define DW_FORM_ref (DWARF_OFFSET_SIZE == 8 ? DW_FORM_ref8 : DW_FORM_ref4) | |
382 | ||
cf2fe500 RH |
383 | #ifndef DEBUG_FRAME_SECTION |
384 | #define DEBUG_FRAME_SECTION ".debug_frame" | |
a3f97cbb | 385 | #endif |
a3f97cbb | 386 | |
5c90448c JM |
387 | #ifndef FUNC_BEGIN_LABEL |
388 | #define FUNC_BEGIN_LABEL "LFB" | |
a3f97cbb | 389 | #endif |
2ad9852d | 390 | |
5c90448c JM |
391 | #ifndef FUNC_END_LABEL |
392 | #define FUNC_END_LABEL "LFE" | |
a3f97cbb | 393 | #endif |
2ad9852d | 394 | |
4746cf84 | 395 | #ifndef FRAME_BEGIN_LABEL |
27d95cbe | 396 | #define FRAME_BEGIN_LABEL "Lframe" |
4746cf84 | 397 | #endif |
a6ab3aad JM |
398 | #define CIE_AFTER_SIZE_LABEL "LSCIE" |
399 | #define CIE_END_LABEL "LECIE" | |
2e4b9b8c RH |
400 | #define FDE_LABEL "LSFDE" |
401 | #define FDE_AFTER_SIZE_LABEL "LASFDE" | |
a6ab3aad | 402 | #define FDE_END_LABEL "LEFDE" |
981975b6 RH |
403 | #define LINE_NUMBER_BEGIN_LABEL "LSLT" |
404 | #define LINE_NUMBER_END_LABEL "LELT" | |
405 | #define LN_PROLOG_AS_LABEL "LASLTP" | |
406 | #define LN_PROLOG_END_LABEL "LELTP" | |
881c6935 | 407 | #define DIE_LABEL_PREFIX "DW" |
a3f97cbb | 408 | |
c8cc5c4a | 409 | /* The DWARF 2 CFA column which tracks the return address. Normally this |
a94dbf2c JM |
410 | is the column for PC, or the first column after all of the hard |
411 | registers. */ | |
c8cc5c4a | 412 | #ifndef DWARF_FRAME_RETURN_COLUMN |
a94dbf2c | 413 | #ifdef PC_REGNUM |
7080f735 | 414 | #define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (PC_REGNUM) |
a94dbf2c | 415 | #else |
7080f735 | 416 | #define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGISTERS |
a94dbf2c | 417 | #endif |
c8cc5c4a JM |
418 | #endif |
419 | ||
420 | /* The mapping from gcc register number to DWARF 2 CFA column number. By | |
469ac993 | 421 | default, we just provide columns for all registers. */ |
c8cc5c4a | 422 | #ifndef DWARF_FRAME_REGNUM |
469ac993 | 423 | #define DWARF_FRAME_REGNUM(REG) DBX_REGISTER_NUMBER (REG) |
c8cc5c4a | 424 | #endif |
2ad9852d | 425 | \f |
0021b564 JM |
426 | /* Hook used by __throw. */ |
427 | ||
428 | rtx | |
7080f735 | 429 | expand_builtin_dwarf_sp_column (void) |
0021b564 | 430 | { |
8f4fc766 | 431 | unsigned int dwarf_regnum = DWARF_FRAME_REGNUM (STACK_POINTER_REGNUM); |
fb638355 | 432 | return GEN_INT (DWARF2_FRAME_REG_OUT (dwarf_regnum, 1)); |
0021b564 JM |
433 | } |
434 | ||
71dfc51f | 435 | /* Return a pointer to a copy of the section string name S with all |
bf20f341 | 436 | attributes stripped off, and an asterisk prepended (for assemble_name). */ |
71dfc51f RK |
437 | |
438 | static inline char * | |
7080f735 | 439 | stripattributes (const char *s) |
a3f97cbb | 440 | { |
5ed6ace5 | 441 | char *stripped = XNEWVEC (char, strlen (s) + 2); |
71dfc51f RK |
442 | char *p = stripped; |
443 | ||
bf20f341 JW |
444 | *p++ = '*'; |
445 | ||
446 | while (*s && *s != ',') | |
447 | *p++ = *s++; | |
71dfc51f | 448 | |
a3f97cbb JW |
449 | *p = '\0'; |
450 | return stripped; | |
451 | } | |
452 | ||
5cd0f915 RS |
453 | /* MEM is a memory reference for the register size table, each element of |
454 | which has mode MODE. Initialize column C as a return address column. */ | |
455 | ||
456 | static void | |
457 | init_return_column_size (enum machine_mode mode, rtx mem, unsigned int c) | |
458 | { | |
459 | HOST_WIDE_INT offset = c * GET_MODE_SIZE (mode); | |
460 | HOST_WIDE_INT size = GET_MODE_SIZE (Pmode); | |
461 | emit_move_insn (adjust_address (mem, mode, offset), GEN_INT (size)); | |
462 | } | |
463 | ||
d9d5c9de | 464 | /* Generate code to initialize the register size table. */ |
2f3ca9e7 | 465 | |
d9d5c9de | 466 | void |
7080f735 | 467 | expand_builtin_init_dwarf_reg_sizes (tree address) |
2f3ca9e7 | 468 | { |
8f4fc766 | 469 | unsigned int i; |
d9d5c9de | 470 | enum machine_mode mode = TYPE_MODE (char_type_node); |
84217346 | 471 | rtx addr = expand_normal (address); |
2ad9852d | 472 | rtx mem = gen_rtx_MEM (BLKmode, addr); |
71628aa0 | 473 | bool wrote_return_column = false; |
2f3ca9e7 | 474 | |
91ea38f9 | 475 | for (i = 0; i < FIRST_PSEUDO_REGISTER; i++) |
fb638355 GK |
476 | { |
477 | int rnum = DWARF2_FRAME_REG_OUT (DWARF_FRAME_REGNUM (i), 1); | |
2878ea73 | 478 | |
fb638355 GK |
479 | if (rnum < DWARF_FRAME_REGISTERS) |
480 | { | |
481 | HOST_WIDE_INT offset = rnum * GET_MODE_SIZE (mode); | |
482 | enum machine_mode save_mode = reg_raw_mode[i]; | |
483 | HOST_WIDE_INT size; | |
2878ea73 | 484 | |
fb638355 GK |
485 | if (HARD_REGNO_CALL_PART_CLOBBERED (i, save_mode)) |
486 | save_mode = choose_hard_reg_mode (i, 1, true); | |
487 | if (DWARF_FRAME_REGNUM (i) == DWARF_FRAME_RETURN_COLUMN) | |
488 | { | |
489 | if (save_mode == VOIDmode) | |
490 | continue; | |
491 | wrote_return_column = true; | |
492 | } | |
493 | size = GET_MODE_SIZE (save_mode); | |
494 | if (offset < 0) | |
495 | continue; | |
2878ea73 | 496 | |
fb638355 GK |
497 | emit_move_insn (adjust_address (mem, mode, offset), |
498 | gen_int_mode (size, mode)); | |
499 | } | |
500 | } | |
ed80cd68 | 501 | |
5cd0f915 RS |
502 | if (!wrote_return_column) |
503 | init_return_column_size (mode, mem, DWARF_FRAME_RETURN_COLUMN); | |
504 | ||
ed80cd68 | 505 | #ifdef DWARF_ALT_FRAME_RETURN_COLUMN |
5cd0f915 | 506 | init_return_column_size (mode, mem, DWARF_ALT_FRAME_RETURN_COLUMN); |
ed80cd68 | 507 | #endif |
37ea0b7e JM |
508 | |
509 | targetm.init_dwarf_reg_sizes_extra (address); | |
2f3ca9e7 JM |
510 | } |
511 | ||
3f76745e | 512 | /* Convert a DWARF call frame info. operation to its string name */ |
a3f97cbb | 513 | |
d560ee52 | 514 | static const char * |
7080f735 | 515 | dwarf_cfi_name (unsigned int cfi_opc) |
3f76745e JM |
516 | { |
517 | switch (cfi_opc) | |
518 | { | |
519 | case DW_CFA_advance_loc: | |
520 | return "DW_CFA_advance_loc"; | |
521 | case DW_CFA_offset: | |
522 | return "DW_CFA_offset"; | |
523 | case DW_CFA_restore: | |
524 | return "DW_CFA_restore"; | |
525 | case DW_CFA_nop: | |
526 | return "DW_CFA_nop"; | |
527 | case DW_CFA_set_loc: | |
528 | return "DW_CFA_set_loc"; | |
529 | case DW_CFA_advance_loc1: | |
530 | return "DW_CFA_advance_loc1"; | |
531 | case DW_CFA_advance_loc2: | |
532 | return "DW_CFA_advance_loc2"; | |
533 | case DW_CFA_advance_loc4: | |
534 | return "DW_CFA_advance_loc4"; | |
535 | case DW_CFA_offset_extended: | |
536 | return "DW_CFA_offset_extended"; | |
537 | case DW_CFA_restore_extended: | |
538 | return "DW_CFA_restore_extended"; | |
539 | case DW_CFA_undefined: | |
540 | return "DW_CFA_undefined"; | |
541 | case DW_CFA_same_value: | |
542 | return "DW_CFA_same_value"; | |
543 | case DW_CFA_register: | |
544 | return "DW_CFA_register"; | |
545 | case DW_CFA_remember_state: | |
546 | return "DW_CFA_remember_state"; | |
547 | case DW_CFA_restore_state: | |
548 | return "DW_CFA_restore_state"; | |
549 | case DW_CFA_def_cfa: | |
550 | return "DW_CFA_def_cfa"; | |
551 | case DW_CFA_def_cfa_register: | |
552 | return "DW_CFA_def_cfa_register"; | |
553 | case DW_CFA_def_cfa_offset: | |
554 | return "DW_CFA_def_cfa_offset"; | |
6bb28965 JM |
555 | |
556 | /* DWARF 3 */ | |
7d9d8943 AM |
557 | case DW_CFA_def_cfa_expression: |
558 | return "DW_CFA_def_cfa_expression"; | |
6bb28965 JM |
559 | case DW_CFA_expression: |
560 | return "DW_CFA_expression"; | |
561 | case DW_CFA_offset_extended_sf: | |
562 | return "DW_CFA_offset_extended_sf"; | |
563 | case DW_CFA_def_cfa_sf: | |
564 | return "DW_CFA_def_cfa_sf"; | |
565 | case DW_CFA_def_cfa_offset_sf: | |
566 | return "DW_CFA_def_cfa_offset_sf"; | |
c53aa195 | 567 | |
3f76745e JM |
568 | /* SGI/MIPS specific */ |
569 | case DW_CFA_MIPS_advance_loc8: | |
570 | return "DW_CFA_MIPS_advance_loc8"; | |
c53aa195 JM |
571 | |
572 | /* GNU extensions */ | |
573 | case DW_CFA_GNU_window_save: | |
574 | return "DW_CFA_GNU_window_save"; | |
0021b564 JM |
575 | case DW_CFA_GNU_args_size: |
576 | return "DW_CFA_GNU_args_size"; | |
3f388b42 GK |
577 | case DW_CFA_GNU_negative_offset_extended: |
578 | return "DW_CFA_GNU_negative_offset_extended"; | |
c53aa195 | 579 | |
3f76745e JM |
580 | default: |
581 | return "DW_CFA_<unknown>"; | |
582 | } | |
583 | } | |
a3f97cbb | 584 | |
3f76745e | 585 | /* Return a pointer to a newly allocated Call Frame Instruction. */ |
71dfc51f | 586 | |
3f76745e | 587 | static inline dw_cfi_ref |
7080f735 | 588 | new_cfi (void) |
3f76745e | 589 | { |
703ad42b | 590 | dw_cfi_ref cfi = ggc_alloc (sizeof (dw_cfi_node)); |
71dfc51f | 591 | |
3f76745e JM |
592 | cfi->dw_cfi_next = NULL; |
593 | cfi->dw_cfi_oprnd1.dw_cfi_reg_num = 0; | |
594 | cfi->dw_cfi_oprnd2.dw_cfi_reg_num = 0; | |
a3f97cbb | 595 | |
3f76745e JM |
596 | return cfi; |
597 | } | |
a3f97cbb | 598 | |
3f76745e | 599 | /* Add a Call Frame Instruction to list of instructions. */ |
a3f97cbb | 600 | |
3f76745e | 601 | static inline void |
7080f735 | 602 | add_cfi (dw_cfi_ref *list_head, dw_cfi_ref cfi) |
3f76745e | 603 | { |
b3694847 | 604 | dw_cfi_ref *p; |
a3f97cbb | 605 | |
3f76745e JM |
606 | /* Find the end of the chain. */ |
607 | for (p = list_head; (*p) != NULL; p = &(*p)->dw_cfi_next) | |
608 | ; | |
609 | ||
610 | *p = cfi; | |
a3f97cbb JW |
611 | } |
612 | ||
3f76745e | 613 | /* Generate a new label for the CFI info to refer to. */ |
71dfc51f | 614 | |
c53aa195 | 615 | char * |
7080f735 | 616 | dwarf2out_cfi_label (void) |
a3f97cbb | 617 | { |
3f76745e | 618 | static char label[20]; |
556273e0 | 619 | |
044b4de3 | 620 | ASM_GENERATE_INTERNAL_LABEL (label, "LCFI", dwarf2out_cfi_label_num++); |
3f76745e | 621 | ASM_OUTPUT_LABEL (asm_out_file, label); |
3f76745e | 622 | return label; |
a3f97cbb JW |
623 | } |
624 | ||
3f76745e JM |
625 | /* Add CFI to the current fde at the PC value indicated by LABEL if specified, |
626 | or to the CIE if LABEL is NULL. */ | |
71dfc51f | 627 | |
3f76745e | 628 | static void |
7080f735 | 629 | add_fde_cfi (const char *label, dw_cfi_ref cfi) |
a3f97cbb | 630 | { |
3f76745e JM |
631 | if (label) |
632 | { | |
b3694847 | 633 | dw_fde_ref fde = &fde_table[fde_table_in_use - 1]; |
a3f97cbb | 634 | |
3f76745e JM |
635 | if (*label == 0) |
636 | label = dwarf2out_cfi_label (); | |
71dfc51f | 637 | |
3f76745e JM |
638 | if (fde->dw_fde_current_label == NULL |
639 | || strcmp (label, fde->dw_fde_current_label) != 0) | |
640 | { | |
b3694847 | 641 | dw_cfi_ref xcfi; |
a3f97cbb | 642 | |
6a10f7b3 | 643 | label = xstrdup (label); |
71dfc51f | 644 | |
3f76745e JM |
645 | /* Set the location counter to the new label. */ |
646 | xcfi = new_cfi (); | |
6a10f7b3 RS |
647 | /* If we have a current label, advance from there, otherwise |
648 | set the location directly using set_loc. */ | |
649 | xcfi->dw_cfi_opc = fde->dw_fde_current_label | |
650 | ? DW_CFA_advance_loc4 | |
651 | : DW_CFA_set_loc; | |
3f76745e JM |
652 | xcfi->dw_cfi_oprnd1.dw_cfi_addr = label; |
653 | add_cfi (&fde->dw_fde_cfi, xcfi); | |
6a10f7b3 RS |
654 | |
655 | fde->dw_fde_current_label = label; | |
3f76745e | 656 | } |
71dfc51f | 657 | |
3f76745e JM |
658 | add_cfi (&fde->dw_fde_cfi, cfi); |
659 | } | |
660 | ||
661 | else | |
662 | add_cfi (&cie_cfi_head, cfi); | |
a3f97cbb JW |
663 | } |
664 | ||
3f76745e | 665 | /* Subroutine of lookup_cfa. */ |
71dfc51f | 666 | |
30e6f306 | 667 | static void |
7080f735 | 668 | lookup_cfa_1 (dw_cfi_ref cfi, dw_cfa_location *loc) |
a3f97cbb | 669 | { |
3f76745e JM |
670 | switch (cfi->dw_cfi_opc) |
671 | { | |
672 | case DW_CFA_def_cfa_offset: | |
7d9d8943 | 673 | loc->offset = cfi->dw_cfi_oprnd1.dw_cfi_offset; |
3f76745e | 674 | break; |
f6672e8e RH |
675 | case DW_CFA_def_cfa_offset_sf: |
676 | loc->offset | |
677 | = cfi->dw_cfi_oprnd1.dw_cfi_offset * DWARF_CIE_DATA_ALIGNMENT; | |
678 | break; | |
3f76745e | 679 | case DW_CFA_def_cfa_register: |
7d9d8943 | 680 | loc->reg = cfi->dw_cfi_oprnd1.dw_cfi_reg_num; |
3f76745e JM |
681 | break; |
682 | case DW_CFA_def_cfa: | |
7d9d8943 AM |
683 | loc->reg = cfi->dw_cfi_oprnd1.dw_cfi_reg_num; |
684 | loc->offset = cfi->dw_cfi_oprnd2.dw_cfi_offset; | |
685 | break; | |
f6672e8e RH |
686 | case DW_CFA_def_cfa_sf: |
687 | loc->reg = cfi->dw_cfi_oprnd1.dw_cfi_reg_num; | |
688 | loc->offset | |
689 | = cfi->dw_cfi_oprnd2.dw_cfi_offset * DWARF_CIE_DATA_ALIGNMENT; | |
690 | break; | |
7d9d8943 AM |
691 | case DW_CFA_def_cfa_expression: |
692 | get_cfa_from_loc_descr (loc, cfi->dw_cfi_oprnd1.dw_cfi_loc); | |
3f76745e | 693 | break; |
e9a25f70 JL |
694 | default: |
695 | break; | |
3f76745e | 696 | } |
a3f97cbb JW |
697 | } |
698 | ||
3f76745e | 699 | /* Find the previous value for the CFA. */ |
71dfc51f | 700 | |
3f76745e | 701 | static void |
7080f735 | 702 | lookup_cfa (dw_cfa_location *loc) |
a3f97cbb | 703 | { |
b3694847 | 704 | dw_cfi_ref cfi; |
3f76745e | 705 | |
30e6f306 | 706 | loc->reg = INVALID_REGNUM; |
7d9d8943 AM |
707 | loc->offset = 0; |
708 | loc->indirect = 0; | |
709 | loc->base_offset = 0; | |
3f76745e JM |
710 | |
711 | for (cfi = cie_cfi_head; cfi; cfi = cfi->dw_cfi_next) | |
7d9d8943 | 712 | lookup_cfa_1 (cfi, loc); |
3f76745e JM |
713 | |
714 | if (fde_table_in_use) | |
a3f97cbb | 715 | { |
b3694847 | 716 | dw_fde_ref fde = &fde_table[fde_table_in_use - 1]; |
3f76745e | 717 | for (cfi = fde->dw_fde_cfi; cfi; cfi = cfi->dw_cfi_next) |
7d9d8943 | 718 | lookup_cfa_1 (cfi, loc); |
a3f97cbb JW |
719 | } |
720 | } | |
721 | ||
3f76745e | 722 | /* The current rule for calculating the DWARF2 canonical frame address. */ |
fbfa55b0 | 723 | static dw_cfa_location cfa; |
71dfc51f | 724 | |
3f76745e JM |
725 | /* The register used for saving registers to the stack, and its offset |
726 | from the CFA. */ | |
fbfa55b0 | 727 | static dw_cfa_location cfa_store; |
3f76745e | 728 | |
0021b564 | 729 | /* The running total of the size of arguments pushed onto the stack. */ |
799f628a | 730 | static HOST_WIDE_INT args_size; |
0021b564 | 731 | |
b57d9225 | 732 | /* The last args_size we actually output. */ |
799f628a | 733 | static HOST_WIDE_INT old_args_size; |
b57d9225 | 734 | |
3f76745e JM |
735 | /* Entry point to update the canonical frame address (CFA). |
736 | LABEL is passed to add_fde_cfi. The value of CFA is now to be | |
737 | calculated from REG+OFFSET. */ | |
738 | ||
739 | void | |
799f628a | 740 | dwarf2out_def_cfa (const char *label, unsigned int reg, HOST_WIDE_INT offset) |
7d9d8943 AM |
741 | { |
742 | dw_cfa_location loc; | |
743 | loc.indirect = 0; | |
744 | loc.base_offset = 0; | |
745 | loc.reg = reg; | |
746 | loc.offset = offset; | |
747 | def_cfa_1 (label, &loc); | |
748 | } | |
749 | ||
30e6f306 RH |
750 | /* Determine if two dw_cfa_location structures define the same data. */ |
751 | ||
752 | static bool | |
753 | cfa_equal_p (const dw_cfa_location *loc1, const dw_cfa_location *loc2) | |
754 | { | |
755 | return (loc1->reg == loc2->reg | |
756 | && loc1->offset == loc2->offset | |
757 | && loc1->indirect == loc2->indirect | |
758 | && (loc1->indirect == 0 | |
759 | || loc1->base_offset == loc2->base_offset)); | |
760 | } | |
761 | ||
770ca8c6 | 762 | /* This routine does the actual work. The CFA is now calculated from |
7d9d8943 | 763 | the dw_cfa_location structure. */ |
2ad9852d | 764 | |
7d9d8943 | 765 | static void |
7080f735 | 766 | def_cfa_1 (const char *label, dw_cfa_location *loc_p) |
a3f97cbb | 767 | { |
b3694847 | 768 | dw_cfi_ref cfi; |
7d9d8943 | 769 | dw_cfa_location old_cfa, loc; |
3f76745e | 770 | |
7d9d8943 AM |
771 | cfa = *loc_p; |
772 | loc = *loc_p; | |
5bef9b1f | 773 | |
7d9d8943 AM |
774 | if (cfa_store.reg == loc.reg && loc.indirect == 0) |
775 | cfa_store.offset = loc.offset; | |
3f76745e | 776 | |
7d9d8943 AM |
777 | loc.reg = DWARF_FRAME_REGNUM (loc.reg); |
778 | lookup_cfa (&old_cfa); | |
779 | ||
2ad9852d | 780 | /* If nothing changed, no need to issue any call frame instructions. */ |
30e6f306 | 781 | if (cfa_equal_p (&loc, &old_cfa)) |
2ad9852d | 782 | return; |
3f76745e JM |
783 | |
784 | cfi = new_cfi (); | |
785 | ||
e09bbb25 | 786 | if (loc.reg == old_cfa.reg && !loc.indirect) |
a3f97cbb | 787 | { |
f6672e8e RH |
788 | /* Construct a "DW_CFA_def_cfa_offset <offset>" instruction, indicating |
789 | the CFA register did not change but the offset did. */ | |
790 | if (loc.offset < 0) | |
791 | { | |
792 | HOST_WIDE_INT f_offset = loc.offset / DWARF_CIE_DATA_ALIGNMENT; | |
793 | gcc_assert (f_offset * DWARF_CIE_DATA_ALIGNMENT == loc.offset); | |
794 | ||
795 | cfi->dw_cfi_opc = DW_CFA_def_cfa_offset_sf; | |
796 | cfi->dw_cfi_oprnd1.dw_cfi_offset = f_offset; | |
797 | } | |
798 | else | |
799 | { | |
800 | cfi->dw_cfi_opc = DW_CFA_def_cfa_offset; | |
801 | cfi->dw_cfi_oprnd1.dw_cfi_offset = loc.offset; | |
802 | } | |
3f76745e | 803 | } |
a3f97cbb | 804 | |
3f76745e | 805 | #ifndef MIPS_DEBUGGING_INFO /* SGI dbx thinks this means no offset. */ |
30e6f306 RH |
806 | else if (loc.offset == old_cfa.offset |
807 | && old_cfa.reg != INVALID_REGNUM | |
e09bbb25 | 808 | && !loc.indirect) |
3f76745e | 809 | { |
770ca8c6 JO |
810 | /* Construct a "DW_CFA_def_cfa_register <register>" instruction, |
811 | indicating the CFA register has changed to <register> but the | |
812 | offset has not changed. */ | |
3f76745e | 813 | cfi->dw_cfi_opc = DW_CFA_def_cfa_register; |
7d9d8943 | 814 | cfi->dw_cfi_oprnd1.dw_cfi_reg_num = loc.reg; |
3f76745e JM |
815 | } |
816 | #endif | |
a3f97cbb | 817 | |
7d9d8943 | 818 | else if (loc.indirect == 0) |
3f76745e | 819 | { |
770ca8c6 JO |
820 | /* Construct a "DW_CFA_def_cfa <register> <offset>" instruction, |
821 | indicating the CFA register has changed to <register> with | |
822 | the specified offset. */ | |
f6672e8e RH |
823 | if (loc.offset < 0) |
824 | { | |
825 | HOST_WIDE_INT f_offset = loc.offset / DWARF_CIE_DATA_ALIGNMENT; | |
826 | gcc_assert (f_offset * DWARF_CIE_DATA_ALIGNMENT == loc.offset); | |
827 | ||
828 | cfi->dw_cfi_opc = DW_CFA_def_cfa_sf; | |
829 | cfi->dw_cfi_oprnd1.dw_cfi_reg_num = loc.reg; | |
830 | cfi->dw_cfi_oprnd2.dw_cfi_offset = f_offset; | |
831 | } | |
832 | else | |
833 | { | |
834 | cfi->dw_cfi_opc = DW_CFA_def_cfa; | |
835 | cfi->dw_cfi_oprnd1.dw_cfi_reg_num = loc.reg; | |
836 | cfi->dw_cfi_oprnd2.dw_cfi_offset = loc.offset; | |
837 | } | |
7d9d8943 AM |
838 | } |
839 | else | |
840 | { | |
770ca8c6 JO |
841 | /* Construct a DW_CFA_def_cfa_expression instruction to |
842 | calculate the CFA using a full location expression since no | |
843 | register-offset pair is available. */ | |
556273e0 | 844 | struct dw_loc_descr_struct *loc_list; |
2ad9852d | 845 | |
7d9d8943 | 846 | cfi->dw_cfi_opc = DW_CFA_def_cfa_expression; |
35d177a2 | 847 | loc_list = build_cfa_loc (&loc, 0); |
7d9d8943 | 848 | cfi->dw_cfi_oprnd1.dw_cfi_loc = loc_list; |
a3f97cbb | 849 | } |
3f76745e JM |
850 | |
851 | add_fde_cfi (label, cfi); | |
a3f97cbb JW |
852 | } |
853 | ||
3f76745e JM |
854 | /* Add the CFI for saving a register. REG is the CFA column number. |
855 | LABEL is passed to add_fde_cfi. | |
856 | If SREG is -1, the register is saved at OFFSET from the CFA; | |
857 | otherwise it is saved in SREG. */ | |
71dfc51f | 858 | |
3f76745e | 859 | static void |
799f628a | 860 | reg_save (const char *label, unsigned int reg, unsigned int sreg, HOST_WIDE_INT offset) |
a3f97cbb | 861 | { |
b3694847 | 862 | dw_cfi_ref cfi = new_cfi (); |
3f76745e JM |
863 | |
864 | cfi->dw_cfi_oprnd1.dw_cfi_reg_num = reg; | |
865 | ||
1bac3811 | 866 | if (sreg == INVALID_REGNUM) |
a3f97cbb | 867 | { |
3f76745e JM |
868 | if (reg & ~0x3f) |
869 | /* The register number won't fit in 6 bits, so we have to use | |
870 | the long form. */ | |
871 | cfi->dw_cfi_opc = DW_CFA_offset_extended; | |
872 | else | |
873 | cfi->dw_cfi_opc = DW_CFA_offset; | |
874 | ||
27c35f4b HPN |
875 | #ifdef ENABLE_CHECKING |
876 | { | |
877 | /* If we get an offset that is not a multiple of | |
878 | DWARF_CIE_DATA_ALIGNMENT, there is either a bug in the | |
879 | definition of DWARF_CIE_DATA_ALIGNMENT, or a bug in the machine | |
880 | description. */ | |
799f628a | 881 | HOST_WIDE_INT check_offset = offset / DWARF_CIE_DATA_ALIGNMENT; |
27c35f4b | 882 | |
ced3f397 | 883 | gcc_assert (check_offset * DWARF_CIE_DATA_ALIGNMENT == offset); |
27c35f4b HPN |
884 | } |
885 | #endif | |
3f76745e | 886 | offset /= DWARF_CIE_DATA_ALIGNMENT; |
3a88cbd1 | 887 | if (offset < 0) |
6bb28965 | 888 | cfi->dw_cfi_opc = DW_CFA_offset_extended_sf; |
2ad9852d | 889 | |
3f76745e JM |
890 | cfi->dw_cfi_oprnd2.dw_cfi_offset = offset; |
891 | } | |
2c849145 | 892 | else if (sreg == reg) |
f8a57be8 | 893 | cfi->dw_cfi_opc = DW_CFA_same_value; |
3f76745e JM |
894 | else |
895 | { | |
896 | cfi->dw_cfi_opc = DW_CFA_register; | |
897 | cfi->dw_cfi_oprnd2.dw_cfi_reg_num = sreg; | |
898 | } | |
899 | ||
900 | add_fde_cfi (label, cfi); | |
901 | } | |
902 | ||
c53aa195 JM |
903 | /* Add the CFI for saving a register window. LABEL is passed to reg_save. |
904 | This CFI tells the unwinder that it needs to restore the window registers | |
905 | from the previous frame's window save area. | |
556273e0 | 906 | |
c53aa195 JM |
907 | ??? Perhaps we should note in the CIE where windows are saved (instead of |
908 | assuming 0(cfa)) and what registers are in the window. */ | |
909 | ||
910 | void | |
7080f735 | 911 | dwarf2out_window_save (const char *label) |
c53aa195 | 912 | { |
b3694847 | 913 | dw_cfi_ref cfi = new_cfi (); |
2ad9852d | 914 | |
c53aa195 JM |
915 | cfi->dw_cfi_opc = DW_CFA_GNU_window_save; |
916 | add_fde_cfi (label, cfi); | |
917 | } | |
918 | ||
0021b564 JM |
919 | /* Add a CFI to update the running total of the size of arguments |
920 | pushed onto the stack. */ | |
921 | ||
922 | void | |
799f628a | 923 | dwarf2out_args_size (const char *label, HOST_WIDE_INT size) |
0021b564 | 924 | { |
b3694847 | 925 | dw_cfi_ref cfi; |
b57d9225 JM |
926 | |
927 | if (size == old_args_size) | |
928 | return; | |
2ad9852d | 929 | |
b57d9225 JM |
930 | old_args_size = size; |
931 | ||
932 | cfi = new_cfi (); | |
0021b564 JM |
933 | cfi->dw_cfi_opc = DW_CFA_GNU_args_size; |
934 | cfi->dw_cfi_oprnd1.dw_cfi_offset = size; | |
935 | add_fde_cfi (label, cfi); | |
936 | } | |
937 | ||
c53aa195 JM |
938 | /* Entry point for saving a register to the stack. REG is the GCC register |
939 | number. LABEL and OFFSET are passed to reg_save. */ | |
3f76745e JM |
940 | |
941 | void | |
799f628a | 942 | dwarf2out_reg_save (const char *label, unsigned int reg, HOST_WIDE_INT offset) |
3f76745e | 943 | { |
1bac3811 | 944 | reg_save (label, DWARF_FRAME_REGNUM (reg), INVALID_REGNUM, offset); |
3f76745e JM |
945 | } |
946 | ||
c53aa195 JM |
947 | /* Entry point for saving the return address in the stack. |
948 | LABEL and OFFSET are passed to reg_save. */ | |
949 | ||
950 | void | |
799f628a | 951 | dwarf2out_return_save (const char *label, HOST_WIDE_INT offset) |
c53aa195 | 952 | { |
1bac3811 | 953 | reg_save (label, DWARF_FRAME_RETURN_COLUMN, INVALID_REGNUM, offset); |
c53aa195 JM |
954 | } |
955 | ||
956 | /* Entry point for saving the return address in a register. | |
957 | LABEL and SREG are passed to reg_save. */ | |
958 | ||
959 | void | |
7080f735 | 960 | dwarf2out_return_reg (const char *label, unsigned int sreg) |
c53aa195 | 961 | { |
1bac3811 | 962 | reg_save (label, DWARF_FRAME_RETURN_COLUMN, DWARF_FRAME_REGNUM (sreg), 0); |
c53aa195 JM |
963 | } |
964 | ||
36bd4303 | 965 | #ifdef DWARF2_UNWIND_INFO |
3f76745e JM |
966 | /* Record the initial position of the return address. RTL is |
967 | INCOMING_RETURN_ADDR_RTX. */ | |
968 | ||
969 | static void | |
7080f735 | 970 | initial_return_save (rtx rtl) |
3f76745e | 971 | { |
1bac3811 | 972 | unsigned int reg = INVALID_REGNUM; |
2ad9852d | 973 | HOST_WIDE_INT offset = 0; |
3f76745e JM |
974 | |
975 | switch (GET_CODE (rtl)) | |
976 | { | |
977 | case REG: | |
978 | /* RA is in a register. */ | |
2c849145 | 979 | reg = DWARF_FRAME_REGNUM (REGNO (rtl)); |
3f76745e | 980 | break; |
2ad9852d | 981 | |
3f76745e JM |
982 | case MEM: |
983 | /* RA is on the stack. */ | |
984 | rtl = XEXP (rtl, 0); | |
985 | switch (GET_CODE (rtl)) | |
986 | { | |
987 | case REG: | |
ced3f397 | 988 | gcc_assert (REGNO (rtl) == STACK_POINTER_REGNUM); |
3f76745e JM |
989 | offset = 0; |
990 | break; | |
2ad9852d | 991 | |
3f76745e | 992 | case PLUS: |
ced3f397 | 993 | gcc_assert (REGNO (XEXP (rtl, 0)) == STACK_POINTER_REGNUM); |
3f76745e JM |
994 | offset = INTVAL (XEXP (rtl, 1)); |
995 | break; | |
2ad9852d | 996 | |
3f76745e | 997 | case MINUS: |
ced3f397 | 998 | gcc_assert (REGNO (XEXP (rtl, 0)) == STACK_POINTER_REGNUM); |
3f76745e JM |
999 | offset = -INTVAL (XEXP (rtl, 1)); |
1000 | break; | |
2ad9852d | 1001 | |
3f76745e | 1002 | default: |
ced3f397 | 1003 | gcc_unreachable (); |
3f76745e | 1004 | } |
2ad9852d | 1005 | |
3f76745e | 1006 | break; |
2ad9852d | 1007 | |
c53aa195 JM |
1008 | case PLUS: |
1009 | /* The return address is at some offset from any value we can | |
1010 | actually load. For instance, on the SPARC it is in %i7+8. Just | |
1011 | ignore the offset for now; it doesn't matter for unwinding frames. */ | |
ced3f397 | 1012 | gcc_assert (GET_CODE (XEXP (rtl, 1)) == CONST_INT); |
c53aa195 JM |
1013 | initial_return_save (XEXP (rtl, 0)); |
1014 | return; | |
2ad9852d | 1015 | |
a3f97cbb | 1016 | default: |
ced3f397 | 1017 | gcc_unreachable (); |
a3f97cbb | 1018 | } |
3f76745e | 1019 | |
f8a57be8 GK |
1020 | if (reg != DWARF_FRAME_RETURN_COLUMN) |
1021 | reg_save (NULL, DWARF_FRAME_RETURN_COLUMN, reg, offset - cfa.offset); | |
a3f97cbb | 1022 | } |
36bd4303 | 1023 | #endif |
a3f97cbb | 1024 | |
1ba5ae8f | 1025 | /* Given a SET, calculate the amount of stack adjustment it |
30f7a378 | 1026 | contains. */ |
1ba5ae8f | 1027 | |
799f628a | 1028 | static HOST_WIDE_INT |
7080f735 | 1029 | stack_adjust_offset (rtx pattern) |
1ba5ae8f AH |
1030 | { |
1031 | rtx src = SET_SRC (pattern); | |
1032 | rtx dest = SET_DEST (pattern); | |
2ad9852d | 1033 | HOST_WIDE_INT offset = 0; |
1ba5ae8f AH |
1034 | enum rtx_code code; |
1035 | ||
1036 | if (dest == stack_pointer_rtx) | |
1037 | { | |
1038 | /* (set (reg sp) (plus (reg sp) (const_int))) */ | |
1039 | code = GET_CODE (src); | |
1040 | if (! (code == PLUS || code == MINUS) | |
1041 | || XEXP (src, 0) != stack_pointer_rtx | |
1042 | || GET_CODE (XEXP (src, 1)) != CONST_INT) | |
1043 | return 0; | |
1044 | ||
1045 | offset = INTVAL (XEXP (src, 1)); | |
f472fa29 AM |
1046 | if (code == PLUS) |
1047 | offset = -offset; | |
1ba5ae8f | 1048 | } |
3c0cb5de | 1049 | else if (MEM_P (dest)) |
1ba5ae8f AH |
1050 | { |
1051 | /* (set (mem (pre_dec (reg sp))) (foo)) */ | |
1052 | src = XEXP (dest, 0); | |
1053 | code = GET_CODE (src); | |
1054 | ||
c26fbbca KH |
1055 | switch (code) |
1056 | { | |
f472fa29 AM |
1057 | case PRE_MODIFY: |
1058 | case POST_MODIFY: | |
1059 | if (XEXP (src, 0) == stack_pointer_rtx) | |
1060 | { | |
1061 | rtx val = XEXP (XEXP (src, 1), 1); | |
1062 | /* We handle only adjustments by constant amount. */ | |
ced3f397 NS |
1063 | gcc_assert (GET_CODE (XEXP (src, 1)) == PLUS |
1064 | && GET_CODE (val) == CONST_INT); | |
f472fa29 AM |
1065 | offset = -INTVAL (val); |
1066 | break; | |
1067 | } | |
1068 | return 0; | |
1069 | ||
1070 | case PRE_DEC: | |
1071 | case POST_DEC: | |
1072 | if (XEXP (src, 0) == stack_pointer_rtx) | |
1073 | { | |
1074 | offset = GET_MODE_SIZE (GET_MODE (dest)); | |
1075 | break; | |
1076 | } | |
1077 | return 0; | |
1078 | ||
1079 | case PRE_INC: | |
1080 | case POST_INC: | |
1081 | if (XEXP (src, 0) == stack_pointer_rtx) | |
1082 | { | |
1083 | offset = -GET_MODE_SIZE (GET_MODE (dest)); | |
1084 | break; | |
1085 | } | |
1086 | return 0; | |
2ad9852d | 1087 | |
f472fa29 AM |
1088 | default: |
1089 | return 0; | |
e2134eea | 1090 | } |
1ba5ae8f AH |
1091 | } |
1092 | else | |
1093 | return 0; | |
1094 | ||
1ba5ae8f AH |
1095 | return offset; |
1096 | } | |
1097 | ||
0021b564 JM |
1098 | /* Check INSN to see if it looks like a push or a stack adjustment, and |
1099 | make a note of it if it does. EH uses this information to find out how | |
1100 | much extra space it needs to pop off the stack. */ | |
1101 | ||
1102 | static void | |
b73aec4f | 1103 | dwarf2out_stack_adjust (rtx insn, bool after_p) |
0021b564 | 1104 | { |
2ad9852d | 1105 | HOST_WIDE_INT offset; |
d3e3972c | 1106 | const char *label; |
2ad9852d | 1107 | int i; |
0021b564 | 1108 | |
b298f00f RH |
1109 | /* Don't handle epilogues at all. Certainly it would be wrong to do so |
1110 | with this function. Proper support would require all frame-related | |
1111 | insns to be marked, and to be able to handle saving state around | |
1112 | epilogues textually in the middle of the function. */ | |
1113 | if (prologue_epilogue_contains (insn) || sibcall_epilogue_contains (insn)) | |
1114 | return; | |
1115 | ||
b73aec4f GK |
1116 | /* If only calls can throw, and we have a frame pointer, |
1117 | save up adjustments until we see the CALL_INSN. */ | |
1118 | if (!flag_asynchronous_unwind_tables && cfa.reg != STACK_POINTER_REGNUM) | |
1119 | { | |
1120 | if (CALL_P (insn) && !after_p) | |
1121 | { | |
1122 | /* Extract the size of the args from the CALL rtx itself. */ | |
1123 | insn = PATTERN (insn); | |
1124 | if (GET_CODE (insn) == PARALLEL) | |
1125 | insn = XVECEXP (insn, 0, 0); | |
1126 | if (GET_CODE (insn) == SET) | |
1127 | insn = SET_SRC (insn); | |
1128 | gcc_assert (GET_CODE (insn) == CALL); | |
1129 | dwarf2out_args_size ("", INTVAL (XEXP (insn, 1))); | |
1130 | } | |
1131 | return; | |
1132 | } | |
1133 | ||
1134 | if (CALL_P (insn) && !after_p) | |
1135 | { | |
1136 | if (!flag_asynchronous_unwind_tables) | |
1137 | dwarf2out_args_size ("", args_size); | |
1138 | return; | |
1139 | } | |
1140 | else if (BARRIER_P (insn)) | |
0021b564 | 1141 | { |
6020d360 JM |
1142 | /* When we see a BARRIER, we know to reset args_size to 0. Usually |
1143 | the compiler will have already emitted a stack adjustment, but | |
1144 | doesn't bother for calls to noreturn functions. */ | |
1145 | #ifdef STACK_GROWS_DOWNWARD | |
1146 | offset = -args_size; | |
1147 | #else | |
1148 | offset = args_size; | |
1149 | #endif | |
0021b564 | 1150 | } |
6020d360 | 1151 | else if (GET_CODE (PATTERN (insn)) == SET) |
2ad9852d | 1152 | offset = stack_adjust_offset (PATTERN (insn)); |
1ba5ae8f AH |
1153 | else if (GET_CODE (PATTERN (insn)) == PARALLEL |
1154 | || GET_CODE (PATTERN (insn)) == SEQUENCE) | |
1155 | { | |
1156 | /* There may be stack adjustments inside compound insns. Search | |
2ad9852d RK |
1157 | for them. */ |
1158 | for (offset = 0, i = XVECLEN (PATTERN (insn), 0) - 1; i >= 0; i--) | |
1159 | if (GET_CODE (XVECEXP (PATTERN (insn), 0, i)) == SET) | |
1160 | offset += stack_adjust_offset (XVECEXP (PATTERN (insn), 0, i)); | |
0021b564 JM |
1161 | } |
1162 | else | |
1163 | return; | |
0b34cf1e | 1164 | |
6020d360 JM |
1165 | if (offset == 0) |
1166 | return; | |
1167 | ||
7d9d8943 AM |
1168 | if (cfa.reg == STACK_POINTER_REGNUM) |
1169 | cfa.offset += offset; | |
0021b564 JM |
1170 | |
1171 | #ifndef STACK_GROWS_DOWNWARD | |
1172 | offset = -offset; | |
1173 | #endif | |
2ad9852d | 1174 | |
0021b564 JM |
1175 | args_size += offset; |
1176 | if (args_size < 0) | |
1177 | args_size = 0; | |
1178 | ||
1179 | label = dwarf2out_cfi_label (); | |
7d9d8943 | 1180 | def_cfa_1 (label, &cfa); |
e0c0490b RH |
1181 | if (flag_asynchronous_unwind_tables) |
1182 | dwarf2out_args_size (label, args_size); | |
0021b564 JM |
1183 | } |
1184 | ||
17211ab5 GK |
1185 | #endif |
1186 | ||
fbfa55b0 RH |
1187 | /* We delay emitting a register save until either (a) we reach the end |
1188 | of the prologue or (b) the register is clobbered. This clusters | |
1189 | register saves so that there are fewer pc advances. */ | |
1190 | ||
17211ab5 | 1191 | struct queued_reg_save GTY(()) |
fbfa55b0 RH |
1192 | { |
1193 | struct queued_reg_save *next; | |
1194 | rtx reg; | |
799f628a | 1195 | HOST_WIDE_INT cfa_offset; |
f8a57be8 | 1196 | rtx saved_reg; |
fbfa55b0 RH |
1197 | }; |
1198 | ||
17211ab5 GK |
1199 | static GTY(()) struct queued_reg_save *queued_reg_saves; |
1200 | ||
f8a57be8 GK |
1201 | /* The caller's ORIG_REG is saved in SAVED_IN_REG. */ |
1202 | struct reg_saved_in_data GTY(()) { | |
1203 | rtx orig_reg; | |
1204 | rtx saved_in_reg; | |
1205 | }; | |
1206 | ||
1207 | /* A list of registers saved in other registers. | |
1208 | The list intentionally has a small maximum capacity of 4; if your | |
1209 | port needs more than that, you might consider implementing a | |
1210 | more efficient data structure. */ | |
1211 | static GTY(()) struct reg_saved_in_data regs_saved_in_regs[4]; | |
1212 | static GTY(()) size_t num_regs_saved_in_regs; | |
a1c496cb | 1213 | |
17211ab5 | 1214 | #if defined (DWARF2_DEBUGGING_INFO) || defined (DWARF2_UNWIND_INFO) |
fbfa55b0 RH |
1215 | static const char *last_reg_save_label; |
1216 | ||
f8a57be8 GK |
1217 | /* Add an entry to QUEUED_REG_SAVES saying that REG is now saved at |
1218 | SREG, or if SREG is NULL then it is saved at OFFSET to the CFA. */ | |
1219 | ||
fbfa55b0 | 1220 | static void |
f8a57be8 | 1221 | queue_reg_save (const char *label, rtx reg, rtx sreg, HOST_WIDE_INT offset) |
fbfa55b0 | 1222 | { |
f8a57be8 GK |
1223 | struct queued_reg_save *q; |
1224 | ||
1225 | /* Duplicates waste space, but it's also necessary to remove them | |
1226 | for correctness, since the queue gets output in reverse | |
1227 | order. */ | |
1228 | for (q = queued_reg_saves; q != NULL; q = q->next) | |
1229 | if (REGNO (q->reg) == REGNO (reg)) | |
1230 | break; | |
1231 | ||
1232 | if (q == NULL) | |
1233 | { | |
1234 | q = ggc_alloc (sizeof (*q)); | |
1235 | q->next = queued_reg_saves; | |
1236 | queued_reg_saves = q; | |
1237 | } | |
fbfa55b0 | 1238 | |
fbfa55b0 RH |
1239 | q->reg = reg; |
1240 | q->cfa_offset = offset; | |
f8a57be8 | 1241 | q->saved_reg = sreg; |
fbfa55b0 RH |
1242 | |
1243 | last_reg_save_label = label; | |
1244 | } | |
1245 | ||
f8a57be8 GK |
1246 | /* Output all the entries in QUEUED_REG_SAVES. */ |
1247 | ||
fbfa55b0 | 1248 | static void |
7080f735 | 1249 | flush_queued_reg_saves (void) |
fbfa55b0 | 1250 | { |
f8a57be8 | 1251 | struct queued_reg_save *q; |
fbfa55b0 | 1252 | |
f8a57be8 | 1253 | for (q = queued_reg_saves; q; q = q->next) |
fbfa55b0 | 1254 | { |
f8a57be8 | 1255 | size_t i; |
1bac3811 RH |
1256 | unsigned int reg, sreg; |
1257 | ||
f8a57be8 GK |
1258 | for (i = 0; i < num_regs_saved_in_regs; i++) |
1259 | if (REGNO (regs_saved_in_regs[i].orig_reg) == REGNO (q->reg)) | |
1260 | break; | |
1261 | if (q->saved_reg && i == num_regs_saved_in_regs) | |
1262 | { | |
ced3f397 | 1263 | gcc_assert (i != ARRAY_SIZE (regs_saved_in_regs)); |
f8a57be8 GK |
1264 | num_regs_saved_in_regs++; |
1265 | } | |
1266 | if (i != num_regs_saved_in_regs) | |
1267 | { | |
1268 | regs_saved_in_regs[i].orig_reg = q->reg; | |
1269 | regs_saved_in_regs[i].saved_in_reg = q->saved_reg; | |
1270 | } | |
1271 | ||
1bac3811 RH |
1272 | reg = DWARF_FRAME_REGNUM (REGNO (q->reg)); |
1273 | if (q->saved_reg) | |
1274 | sreg = DWARF_FRAME_REGNUM (REGNO (q->saved_reg)); | |
1275 | else | |
1276 | sreg = INVALID_REGNUM; | |
1277 | reg_save (last_reg_save_label, reg, sreg, q->cfa_offset); | |
fbfa55b0 RH |
1278 | } |
1279 | ||
1280 | queued_reg_saves = NULL; | |
1281 | last_reg_save_label = NULL; | |
1282 | } | |
1283 | ||
f8a57be8 GK |
1284 | /* Does INSN clobber any register which QUEUED_REG_SAVES lists a saved |
1285 | location for? Or, does it clobber a register which we've previously | |
1286 | said that some other register is saved in, and for which we now | |
1287 | have a new location for? */ | |
1288 | ||
fbfa55b0 | 1289 | static bool |
7080f735 | 1290 | clobbers_queued_reg_save (rtx insn) |
fbfa55b0 RH |
1291 | { |
1292 | struct queued_reg_save *q; | |
1293 | ||
c26fbbca | 1294 | for (q = queued_reg_saves; q; q = q->next) |
f8a57be8 GK |
1295 | { |
1296 | size_t i; | |
1297 | if (modified_in_p (q->reg, insn)) | |
1298 | return true; | |
1299 | for (i = 0; i < num_regs_saved_in_regs; i++) | |
1300 | if (REGNO (q->reg) == REGNO (regs_saved_in_regs[i].orig_reg) | |
1301 | && modified_in_p (regs_saved_in_regs[i].saved_in_reg, insn)) | |
1302 | return true; | |
1303 | } | |
fbfa55b0 RH |
1304 | |
1305 | return false; | |
1306 | } | |
c26fbbca | 1307 | |
150cdc9e RH |
1308 | /* Entry point for saving the first register into the second. */ |
1309 | ||
1310 | void | |
1311 | dwarf2out_reg_save_reg (const char *label, rtx reg, rtx sreg) | |
1312 | { | |
1313 | size_t i; | |
1314 | unsigned int regno, sregno; | |
1315 | ||
1316 | for (i = 0; i < num_regs_saved_in_regs; i++) | |
1317 | if (REGNO (regs_saved_in_regs[i].orig_reg) == REGNO (reg)) | |
1318 | break; | |
1319 | if (i == num_regs_saved_in_regs) | |
1320 | { | |
1321 | gcc_assert (i != ARRAY_SIZE (regs_saved_in_regs)); | |
1322 | num_regs_saved_in_regs++; | |
1323 | } | |
1324 | regs_saved_in_regs[i].orig_reg = reg; | |
1325 | regs_saved_in_regs[i].saved_in_reg = sreg; | |
1326 | ||
1327 | regno = DWARF_FRAME_REGNUM (REGNO (reg)); | |
1328 | sregno = DWARF_FRAME_REGNUM (REGNO (sreg)); | |
1329 | reg_save (label, regno, sregno, 0); | |
1330 | } | |
1331 | ||
f8a57be8 GK |
1332 | /* What register, if any, is currently saved in REG? */ |
1333 | ||
1334 | static rtx | |
1335 | reg_saved_in (rtx reg) | |
1336 | { | |
1337 | unsigned int regn = REGNO (reg); | |
1338 | size_t i; | |
1339 | struct queued_reg_save *q; | |
a1c496cb | 1340 | |
f8a57be8 GK |
1341 | for (q = queued_reg_saves; q; q = q->next) |
1342 | if (q->saved_reg && regn == REGNO (q->saved_reg)) | |
1343 | return q->reg; | |
1344 | ||
1345 | for (i = 0; i < num_regs_saved_in_regs; i++) | |
1346 | if (regs_saved_in_regs[i].saved_in_reg | |
1347 | && regn == REGNO (regs_saved_in_regs[i].saved_in_reg)) | |
1348 | return regs_saved_in_regs[i].orig_reg; | |
1349 | ||
1350 | return NULL_RTX; | |
1351 | } | |
1352 | ||
fbfa55b0 | 1353 | |
770ca8c6 JO |
1354 | /* A temporary register holding an integral value used in adjusting SP |
1355 | or setting up the store_reg. The "offset" field holds the integer | |
1356 | value, not an offset. */ | |
fbfa55b0 | 1357 | static dw_cfa_location cfa_temp; |
770ca8c6 JO |
1358 | |
1359 | /* Record call frame debugging information for an expression EXPR, | |
1360 | which either sets SP or FP (adjusting how we calculate the frame | |
f8a57be8 GK |
1361 | address) or saves a register to the stack or another register. |
1362 | LABEL indicates the address of EXPR. | |
770ca8c6 JO |
1363 | |
1364 | This function encodes a state machine mapping rtxes to actions on | |
1365 | cfa, cfa_store, and cfa_temp.reg. We describe these rules so | |
1366 | users need not read the source code. | |
1367 | ||
a401107d JO |
1368 | The High-Level Picture |
1369 | ||
1370 | Changes in the register we use to calculate the CFA: Currently we | |
1371 | assume that if you copy the CFA register into another register, we | |
1372 | should take the other one as the new CFA register; this seems to | |
1373 | work pretty well. If it's wrong for some target, it's simple | |
1374 | enough not to set RTX_FRAME_RELATED_P on the insn in question. | |
1375 | ||
1376 | Changes in the register we use for saving registers to the stack: | |
1377 | This is usually SP, but not always. Again, we deduce that if you | |
1378 | copy SP into another register (and SP is not the CFA register), | |
1379 | then the new register is the one we will be using for register | |
1380 | saves. This also seems to work. | |
1381 | ||
1382 | Register saves: There's not much guesswork about this one; if | |
1383 | RTX_FRAME_RELATED_P is set on an insn which modifies memory, it's a | |
1384 | register save, and the register used to calculate the destination | |
1385 | had better be the one we think we're using for this purpose. | |
f8a57be8 GK |
1386 | It's also assumed that a copy from a call-saved register to another |
1387 | register is saving that register if RTX_FRAME_RELATED_P is set on | |
1388 | that instruction. If the copy is from a call-saved register to | |
1389 | the *same* register, that means that the register is now the same | |
1390 | value as in the caller. | |
a401107d JO |
1391 | |
1392 | Except: If the register being saved is the CFA register, and the | |
cc2902df | 1393 | offset is nonzero, we are saving the CFA, so we assume we have to |
a401107d JO |
1394 | use DW_CFA_def_cfa_expression. If the offset is 0, we assume that |
1395 | the intent is to save the value of SP from the previous frame. | |
1396 | ||
f8a57be8 | 1397 | In addition, if a register has previously been saved to a different |
a1c496cb | 1398 | register, |
f8a57be8 | 1399 | |
770ca8c6 JO |
1400 | Invariants / Summaries of Rules |
1401 | ||
a401107d JO |
1402 | cfa current rule for calculating the CFA. It usually |
1403 | consists of a register and an offset. | |
770ca8c6 JO |
1404 | cfa_store register used by prologue code to save things to the stack |
1405 | cfa_store.offset is the offset from the value of | |
1406 | cfa_store.reg to the actual CFA | |
1407 | cfa_temp register holding an integral value. cfa_temp.offset | |
1408 | stores the value, which will be used to adjust the | |
19ec6a36 AM |
1409 | stack pointer. cfa_temp is also used like cfa_store, |
1410 | to track stores to the stack via fp or a temp reg. | |
c26fbbca | 1411 | |
770ca8c6 | 1412 | Rules 1- 4: Setting a register's value to cfa.reg or an expression |
7080f735 | 1413 | with cfa.reg as the first operand changes the cfa.reg and its |
19ec6a36 AM |
1414 | cfa.offset. Rule 1 and 4 also set cfa_temp.reg and |
1415 | cfa_temp.offset. | |
770ca8c6 JO |
1416 | |
1417 | Rules 6- 9: Set a non-cfa.reg register value to a constant or an | |
1418 | expression yielding a constant. This sets cfa_temp.reg | |
1419 | and cfa_temp.offset. | |
1420 | ||
1421 | Rule 5: Create a new register cfa_store used to save items to the | |
1422 | stack. | |
1423 | ||
19ec6a36 | 1424 | Rules 10-14: Save a register to the stack. Define offset as the |
a401107d | 1425 | difference of the original location and cfa_store's |
19ec6a36 | 1426 | location (or cfa_temp's location if cfa_temp is used). |
770ca8c6 JO |
1427 | |
1428 | The Rules | |
1429 | ||
1430 | "{a,b}" indicates a choice of a xor b. | |
1431 | "<reg>:cfa.reg" indicates that <reg> must equal cfa.reg. | |
1432 | ||
1433 | Rule 1: | |
1434 | (set <reg1> <reg2>:cfa.reg) | |
19ec6a36 | 1435 | effects: cfa.reg = <reg1> |
73c68f61 | 1436 | cfa.offset unchanged |
19ec6a36 AM |
1437 | cfa_temp.reg = <reg1> |
1438 | cfa_temp.offset = cfa.offset | |
770ca8c6 JO |
1439 | |
1440 | Rule 2: | |
2ad9852d RK |
1441 | (set sp ({minus,plus,losum} {sp,fp}:cfa.reg |
1442 | {<const_int>,<reg>:cfa_temp.reg})) | |
770ca8c6 | 1443 | effects: cfa.reg = sp if fp used |
7080f735 | 1444 | cfa.offset += {+/- <const_int>, cfa_temp.offset} if cfa.reg==sp |
770ca8c6 JO |
1445 | cfa_store.offset += {+/- <const_int>, cfa_temp.offset} |
1446 | if cfa_store.reg==sp | |
1447 | ||
1448 | Rule 3: | |
19ec6a36 | 1449 | (set fp ({minus,plus,losum} <reg>:cfa.reg <const_int>)) |
770ca8c6 | 1450 | effects: cfa.reg = fp |
7080f735 | 1451 | cfa_offset += +/- <const_int> |
770ca8c6 JO |
1452 | |
1453 | Rule 4: | |
19ec6a36 | 1454 | (set <reg1> ({plus,losum} <reg2>:cfa.reg <const_int>)) |
770ca8c6 | 1455 | constraints: <reg1> != fp |
7080f735 | 1456 | <reg1> != sp |
770ca8c6 | 1457 | effects: cfa.reg = <reg1> |
19ec6a36 AM |
1458 | cfa_temp.reg = <reg1> |
1459 | cfa_temp.offset = cfa.offset | |
770ca8c6 JO |
1460 | |
1461 | Rule 5: | |
1462 | (set <reg1> (plus <reg2>:cfa_temp.reg sp:cfa.reg)) | |
1463 | constraints: <reg1> != fp | |
7080f735 | 1464 | <reg1> != sp |
770ca8c6 | 1465 | effects: cfa_store.reg = <reg1> |
7080f735 | 1466 | cfa_store.offset = cfa.offset - cfa_temp.offset |
770ca8c6 JO |
1467 | |
1468 | Rule 6: | |
1469 | (set <reg> <const_int>) | |
1470 | effects: cfa_temp.reg = <reg> | |
7080f735 | 1471 | cfa_temp.offset = <const_int> |
770ca8c6 JO |
1472 | |
1473 | Rule 7: | |
1474 | (set <reg1>:cfa_temp.reg (ior <reg2>:cfa_temp.reg <const_int>)) | |
1475 | effects: cfa_temp.reg = <reg1> | |
1476 | cfa_temp.offset |= <const_int> | |
1477 | ||
1478 | Rule 8: | |
1479 | (set <reg> (high <exp>)) | |
1480 | effects: none | |
1481 | ||
1482 | Rule 9: | |
1483 | (set <reg> (lo_sum <exp> <const_int>)) | |
1484 | effects: cfa_temp.reg = <reg> | |
7080f735 | 1485 | cfa_temp.offset = <const_int> |
770ca8c6 JO |
1486 | |
1487 | Rule 10: | |
1488 | (set (mem (pre_modify sp:cfa_store (???? <reg1> <const_int>))) <reg2>) | |
1489 | effects: cfa_store.offset -= <const_int> | |
1490 | cfa.offset = cfa_store.offset if cfa.reg == sp | |
770ca8c6 | 1491 | cfa.reg = sp |
19ec6a36 | 1492 | cfa.base_offset = -cfa_store.offset |
770ca8c6 JO |
1493 | |
1494 | Rule 11: | |
1495 | (set (mem ({pre_inc,pre_dec} sp:cfa_store.reg)) <reg>) | |
1496 | effects: cfa_store.offset += -/+ mode_size(mem) | |
1497 | cfa.offset = cfa_store.offset if cfa.reg == sp | |
770ca8c6 | 1498 | cfa.reg = sp |
19ec6a36 | 1499 | cfa.base_offset = -cfa_store.offset |
770ca8c6 JO |
1500 | |
1501 | Rule 12: | |
2ad9852d RK |
1502 | (set (mem ({minus,plus,losum} <reg1>:{cfa_store,cfa_temp} <const_int>)) |
1503 | ||
1504 | <reg2>) | |
19ec6a36 AM |
1505 | effects: cfa.reg = <reg1> |
1506 | cfa.base_offset = -/+ <const_int> - {cfa_store,cfa_temp}.offset | |
770ca8c6 JO |
1507 | |
1508 | Rule 13: | |
19ec6a36 AM |
1509 | (set (mem <reg1>:{cfa_store,cfa_temp}) <reg2>) |
1510 | effects: cfa.reg = <reg1> | |
1511 | cfa.base_offset = -{cfa_store,cfa_temp}.offset | |
1512 | ||
1513 | Rule 14: | |
1514 | (set (mem (postinc <reg1>:cfa_temp <const_int>)) <reg2>) | |
1515 | effects: cfa.reg = <reg1> | |
1516 | cfa.base_offset = -cfa_temp.offset | |
e54c7471 EB |
1517 | cfa_temp.offset -= mode_size(mem) |
1518 | ||
10b01bca GK |
1519 | Rule 15: |
1520 | (set <reg> {unspec, unspec_volatile}) | |
1521 | effects: target-dependent */ | |
b664de3a AM |
1522 | |
1523 | static void | |
7080f735 | 1524 | dwarf2out_frame_debug_expr (rtx expr, const char *label) |
b664de3a AM |
1525 | { |
1526 | rtx src, dest; | |
2ad9852d | 1527 | HOST_WIDE_INT offset; |
556273e0 KH |
1528 | |
1529 | /* If RTX_FRAME_RELATED_P is set on a PARALLEL, process each member of | |
1530 | the PARALLEL independently. The first element is always processed if | |
770ca8c6 | 1531 | it is a SET. This is for backward compatibility. Other elements |
556273e0 KH |
1532 | are processed only if they are SETs and the RTX_FRAME_RELATED_P |
1533 | flag is set in them. */ | |
2ad9852d | 1534 | if (GET_CODE (expr) == PARALLEL || GET_CODE (expr) == SEQUENCE) |
556273e0 | 1535 | { |
b664de3a AM |
1536 | int par_index; |
1537 | int limit = XVECLEN (expr, 0); | |
55d6f631 RS |
1538 | rtx elem; |
1539 | ||
1540 | /* PARALLELs have strict read-modify-write semantics, so we | |
1541 | ought to evaluate every rvalue before changing any lvalue. | |
1542 | It's cumbersome to do that in general, but there's an | |
1543 | easy approximation that is enough for all current users: | |
1544 | handle register saves before register assignments. */ | |
1545 | if (GET_CODE (expr) == PARALLEL) | |
1546 | for (par_index = 0; par_index < limit; par_index++) | |
1547 | { | |
1548 | elem = XVECEXP (expr, 0, par_index); | |
1549 | if (GET_CODE (elem) == SET | |
1550 | && MEM_P (SET_DEST (elem)) | |
1551 | && (RTX_FRAME_RELATED_P (elem) || par_index == 0)) | |
1552 | dwarf2out_frame_debug_expr (elem, label); | |
1553 | } | |
b664de3a AM |
1554 | |
1555 | for (par_index = 0; par_index < limit; par_index++) | |
55d6f631 RS |
1556 | { |
1557 | elem = XVECEXP (expr, 0, par_index); | |
1558 | if (GET_CODE (elem) == SET | |
1559 | && (!MEM_P (SET_DEST (elem)) || GET_CODE (expr) == SEQUENCE) | |
1560 | && (RTX_FRAME_RELATED_P (elem) || par_index == 0)) | |
1561 | dwarf2out_frame_debug_expr (elem, label); | |
1562 | } | |
b664de3a AM |
1563 | return; |
1564 | } | |
556273e0 | 1565 | |
ced3f397 | 1566 | gcc_assert (GET_CODE (expr) == SET); |
b664de3a AM |
1567 | |
1568 | src = SET_SRC (expr); | |
1569 | dest = SET_DEST (expr); | |
1570 | ||
2ca202e7 | 1571 | if (REG_P (src)) |
f8a57be8 GK |
1572 | { |
1573 | rtx rsi = reg_saved_in (src); | |
1574 | if (rsi) | |
1575 | src = rsi; | |
1576 | } | |
1577 | ||
b664de3a AM |
1578 | switch (GET_CODE (dest)) |
1579 | { | |
1580 | case REG: | |
b664de3a | 1581 | switch (GET_CODE (src)) |
556273e0 KH |
1582 | { |
1583 | /* Setting FP from SP. */ | |
1584 | case REG: | |
1585 | if (cfa.reg == (unsigned) REGNO (src)) | |
f8a57be8 GK |
1586 | { |
1587 | /* Rule 1 */ | |
1588 | /* Update the CFA rule wrt SP or FP. Make sure src is | |
a1c496cb | 1589 | relative to the current CFA register. |
f8a57be8 GK |
1590 | |
1591 | We used to require that dest be either SP or FP, but the | |
1592 | ARM copies SP to a temporary register, and from there to | |
1593 | FP. So we just rely on the backends to only set | |
1594 | RTX_FRAME_RELATED_P on appropriate insns. */ | |
1595 | cfa.reg = REGNO (dest); | |
1596 | cfa_temp.reg = cfa.reg; | |
1597 | cfa_temp.offset = cfa.offset; | |
1598 | } | |
ced3f397 | 1599 | else |
f8a57be8 GK |
1600 | { |
1601 | /* Saving a register in a register. */ | |
2c42e193 AM |
1602 | gcc_assert (!fixed_regs [REGNO (dest)] |
1603 | /* For the SPARC and its register window. */ | |
1604 | || (DWARF_FRAME_REGNUM (REGNO (src)) | |
1605 | == DWARF_FRAME_RETURN_COLUMN)); | |
f8a57be8 GK |
1606 | queue_reg_save (label, src, dest, 0); |
1607 | } | |
556273e0 | 1608 | break; |
b664de3a | 1609 | |
556273e0 KH |
1610 | case PLUS: |
1611 | case MINUS: | |
19ec6a36 | 1612 | case LO_SUM: |
556273e0 KH |
1613 | if (dest == stack_pointer_rtx) |
1614 | { | |
770ca8c6 | 1615 | /* Rule 2 */ |
2618f955 MM |
1616 | /* Adjusting SP. */ |
1617 | switch (GET_CODE (XEXP (src, 1))) | |
1618 | { | |
1619 | case CONST_INT: | |
1620 | offset = INTVAL (XEXP (src, 1)); | |
1621 | break; | |
1622 | case REG: | |
ced3f397 NS |
1623 | gcc_assert ((unsigned) REGNO (XEXP (src, 1)) |
1624 | == cfa_temp.reg); | |
770ca8c6 | 1625 | offset = cfa_temp.offset; |
2618f955 MM |
1626 | break; |
1627 | default: | |
ced3f397 | 1628 | gcc_unreachable (); |
2618f955 MM |
1629 | } |
1630 | ||
1631 | if (XEXP (src, 0) == hard_frame_pointer_rtx) | |
1632 | { | |
1633 | /* Restoring SP from FP in the epilogue. */ | |
ced3f397 | 1634 | gcc_assert (cfa.reg == (unsigned) HARD_FRAME_POINTER_REGNUM); |
7d9d8943 | 1635 | cfa.reg = STACK_POINTER_REGNUM; |
2618f955 | 1636 | } |
19ec6a36 AM |
1637 | else if (GET_CODE (src) == LO_SUM) |
1638 | /* Assume we've set the source reg of the LO_SUM from sp. */ | |
1639 | ; | |
ced3f397 NS |
1640 | else |
1641 | gcc_assert (XEXP (src, 0) == stack_pointer_rtx); | |
2618f955 | 1642 | |
19ec6a36 | 1643 | if (GET_CODE (src) != MINUS) |
2618f955 | 1644 | offset = -offset; |
7d9d8943 AM |
1645 | if (cfa.reg == STACK_POINTER_REGNUM) |
1646 | cfa.offset += offset; | |
1647 | if (cfa_store.reg == STACK_POINTER_REGNUM) | |
1648 | cfa_store.offset += offset; | |
556273e0 KH |
1649 | } |
1650 | else if (dest == hard_frame_pointer_rtx) | |
1651 | { | |
770ca8c6 | 1652 | /* Rule 3 */ |
2618f955 MM |
1653 | /* Either setting the FP from an offset of the SP, |
1654 | or adjusting the FP */ | |
ced3f397 | 1655 | gcc_assert (frame_pointer_needed); |
2618f955 | 1656 | |
ced3f397 NS |
1657 | gcc_assert (REG_P (XEXP (src, 0)) |
1658 | && (unsigned) REGNO (XEXP (src, 0)) == cfa.reg | |
1659 | && GET_CODE (XEXP (src, 1)) == CONST_INT); | |
1660 | offset = INTVAL (XEXP (src, 1)); | |
1661 | if (GET_CODE (src) != MINUS) | |
1662 | offset = -offset; | |
1663 | cfa.offset += offset; | |
1664 | cfa.reg = HARD_FRAME_POINTER_REGNUM; | |
556273e0 KH |
1665 | } |
1666 | else | |
1667 | { | |
ced3f397 | 1668 | gcc_assert (GET_CODE (src) != MINUS); |
b53ef1a2 | 1669 | |
770ca8c6 | 1670 | /* Rule 4 */ |
f8cfc6aa | 1671 | if (REG_P (XEXP (src, 0)) |
b53ef1a2 NC |
1672 | && REGNO (XEXP (src, 0)) == cfa.reg |
1673 | && GET_CODE (XEXP (src, 1)) == CONST_INT) | |
34ce3d7b JM |
1674 | { |
1675 | /* Setting a temporary CFA register that will be copied | |
1676 | into the FP later on. */ | |
19ec6a36 | 1677 | offset = - INTVAL (XEXP (src, 1)); |
34ce3d7b JM |
1678 | cfa.offset += offset; |
1679 | cfa.reg = REGNO (dest); | |
19ec6a36 AM |
1680 | /* Or used to save regs to the stack. */ |
1681 | cfa_temp.reg = cfa.reg; | |
1682 | cfa_temp.offset = cfa.offset; | |
34ce3d7b | 1683 | } |
2ad9852d | 1684 | |
770ca8c6 | 1685 | /* Rule 5 */ |
f8cfc6aa | 1686 | else if (REG_P (XEXP (src, 0)) |
19ec6a36 AM |
1687 | && REGNO (XEXP (src, 0)) == cfa_temp.reg |
1688 | && XEXP (src, 1) == stack_pointer_rtx) | |
b53ef1a2 | 1689 | { |
00a42e21 JM |
1690 | /* Setting a scratch register that we will use instead |
1691 | of SP for saving registers to the stack. */ | |
ced3f397 | 1692 | gcc_assert (cfa.reg == STACK_POINTER_REGNUM); |
b53ef1a2 | 1693 | cfa_store.reg = REGNO (dest); |
770ca8c6 | 1694 | cfa_store.offset = cfa.offset - cfa_temp.offset; |
b53ef1a2 | 1695 | } |
2ad9852d | 1696 | |
19ec6a36 AM |
1697 | /* Rule 9 */ |
1698 | else if (GET_CODE (src) == LO_SUM | |
1699 | && GET_CODE (XEXP (src, 1)) == CONST_INT) | |
1700 | { | |
1701 | cfa_temp.reg = REGNO (dest); | |
1702 | cfa_temp.offset = INTVAL (XEXP (src, 1)); | |
1703 | } | |
1704 | else | |
ced3f397 | 1705 | gcc_unreachable (); |
556273e0 KH |
1706 | } |
1707 | break; | |
b664de3a | 1708 | |
770ca8c6 | 1709 | /* Rule 6 */ |
556273e0 | 1710 | case CONST_INT: |
770ca8c6 JO |
1711 | cfa_temp.reg = REGNO (dest); |
1712 | cfa_temp.offset = INTVAL (src); | |
556273e0 | 1713 | break; |
b664de3a | 1714 | |
770ca8c6 | 1715 | /* Rule 7 */ |
556273e0 | 1716 | case IOR: |
ced3f397 NS |
1717 | gcc_assert (REG_P (XEXP (src, 0)) |
1718 | && (unsigned) REGNO (XEXP (src, 0)) == cfa_temp.reg | |
1719 | && GET_CODE (XEXP (src, 1)) == CONST_INT); | |
2ad9852d | 1720 | |
770ca8c6 JO |
1721 | if ((unsigned) REGNO (dest) != cfa_temp.reg) |
1722 | cfa_temp.reg = REGNO (dest); | |
1723 | cfa_temp.offset |= INTVAL (XEXP (src, 1)); | |
556273e0 | 1724 | break; |
b664de3a | 1725 | |
9ae21d2a AM |
1726 | /* Skip over HIGH, assuming it will be followed by a LO_SUM, |
1727 | which will fill in all of the bits. */ | |
1728 | /* Rule 8 */ | |
1729 | case HIGH: | |
1730 | break; | |
1731 | ||
e54c7471 EB |
1732 | /* Rule 15 */ |
1733 | case UNSPEC: | |
1734 | case UNSPEC_VOLATILE: | |
1735 | gcc_assert (targetm.dwarf_handle_frame_unspec); | |
1736 | targetm.dwarf_handle_frame_unspec (label, expr, XINT (src, 1)); | |
150cdc9e | 1737 | return; |
e54c7471 | 1738 | |
556273e0 | 1739 | default: |
ced3f397 | 1740 | gcc_unreachable (); |
556273e0 | 1741 | } |
2ad9852d | 1742 | |
7d9d8943 | 1743 | def_cfa_1 (label, &cfa); |
2618f955 | 1744 | break; |
b664de3a | 1745 | |
2618f955 | 1746 | case MEM: |
ced3f397 | 1747 | gcc_assert (REG_P (src)); |
7d9d8943 | 1748 | |
7d9d8943 AM |
1749 | /* Saving a register to the stack. Make sure dest is relative to the |
1750 | CFA register. */ | |
2618f955 MM |
1751 | switch (GET_CODE (XEXP (dest, 0))) |
1752 | { | |
770ca8c6 | 1753 | /* Rule 10 */ |
2618f955 | 1754 | /* With a push. */ |
e2134eea JH |
1755 | case PRE_MODIFY: |
1756 | /* We can't handle variable size modifications. */ | |
ced3f397 NS |
1757 | gcc_assert (GET_CODE (XEXP (XEXP (XEXP (dest, 0), 1), 1)) |
1758 | == CONST_INT); | |
e2134eea JH |
1759 | offset = -INTVAL (XEXP (XEXP (XEXP (dest, 0), 1), 1)); |
1760 | ||
ced3f397 NS |
1761 | gcc_assert (REGNO (XEXP (XEXP (dest, 0), 0)) == STACK_POINTER_REGNUM |
1762 | && cfa_store.reg == STACK_POINTER_REGNUM); | |
2ad9852d | 1763 | |
e2134eea JH |
1764 | cfa_store.offset += offset; |
1765 | if (cfa.reg == STACK_POINTER_REGNUM) | |
1766 | cfa.offset = cfa_store.offset; | |
1767 | ||
1768 | offset = -cfa_store.offset; | |
1769 | break; | |
2ad9852d | 1770 | |
770ca8c6 | 1771 | /* Rule 11 */ |
2618f955 MM |
1772 | case PRE_INC: |
1773 | case PRE_DEC: | |
1774 | offset = GET_MODE_SIZE (GET_MODE (dest)); | |
1775 | if (GET_CODE (XEXP (dest, 0)) == PRE_INC) | |
1776 | offset = -offset; | |
b664de3a | 1777 | |
ced3f397 NS |
1778 | gcc_assert (REGNO (XEXP (XEXP (dest, 0), 0)) == STACK_POINTER_REGNUM |
1779 | && cfa_store.reg == STACK_POINTER_REGNUM); | |
2ad9852d | 1780 | |
7d9d8943 AM |
1781 | cfa_store.offset += offset; |
1782 | if (cfa.reg == STACK_POINTER_REGNUM) | |
1783 | cfa.offset = cfa_store.offset; | |
b664de3a | 1784 | |
7d9d8943 | 1785 | offset = -cfa_store.offset; |
2618f955 | 1786 | break; |
b664de3a | 1787 | |
770ca8c6 | 1788 | /* Rule 12 */ |
2618f955 MM |
1789 | /* With an offset. */ |
1790 | case PLUS: | |
1791 | case MINUS: | |
19ec6a36 | 1792 | case LO_SUM: |
ced3f397 NS |
1793 | { |
1794 | int regno; | |
a1c496cb | 1795 | |
66a5ab40 AM |
1796 | gcc_assert (GET_CODE (XEXP (XEXP (dest, 0), 1)) == CONST_INT |
1797 | && REG_P (XEXP (XEXP (dest, 0), 0))); | |
ced3f397 NS |
1798 | offset = INTVAL (XEXP (XEXP (dest, 0), 1)); |
1799 | if (GET_CODE (XEXP (dest, 0)) == MINUS) | |
1800 | offset = -offset; | |
1801 | ||
1802 | regno = REGNO (XEXP (XEXP (dest, 0), 0)); | |
a1c496cb | 1803 | |
ced3f397 NS |
1804 | if (cfa_store.reg == (unsigned) regno) |
1805 | offset -= cfa_store.offset; | |
1806 | else | |
1807 | { | |
1808 | gcc_assert (cfa_temp.reg == (unsigned) regno); | |
1809 | offset -= cfa_temp.offset; | |
1810 | } | |
1811 | } | |
2618f955 MM |
1812 | break; |
1813 | ||
770ca8c6 | 1814 | /* Rule 13 */ |
2618f955 MM |
1815 | /* Without an offset. */ |
1816 | case REG: | |
ced3f397 NS |
1817 | { |
1818 | int regno = REGNO (XEXP (dest, 0)); | |
a1c496cb | 1819 | |
ced3f397 NS |
1820 | if (cfa_store.reg == (unsigned) regno) |
1821 | offset = -cfa_store.offset; | |
1822 | else | |
1823 | { | |
1824 | gcc_assert (cfa_temp.reg == (unsigned) regno); | |
1825 | offset = -cfa_temp.offset; | |
1826 | } | |
1827 | } | |
19ec6a36 AM |
1828 | break; |
1829 | ||
1830 | /* Rule 14 */ | |
1831 | case POST_INC: | |
ced3f397 NS |
1832 | gcc_assert (cfa_temp.reg |
1833 | == (unsigned) REGNO (XEXP (XEXP (dest, 0), 0))); | |
19ec6a36 AM |
1834 | offset = -cfa_temp.offset; |
1835 | cfa_temp.offset -= GET_MODE_SIZE (GET_MODE (dest)); | |
2618f955 MM |
1836 | break; |
1837 | ||
1838 | default: | |
ced3f397 | 1839 | gcc_unreachable (); |
2618f955 | 1840 | } |
e09bbb25 | 1841 | |
556273e0 | 1842 | if (REGNO (src) != STACK_POINTER_REGNUM |
e09bbb25 JM |
1843 | && REGNO (src) != HARD_FRAME_POINTER_REGNUM |
1844 | && (unsigned) REGNO (src) == cfa.reg) | |
1845 | { | |
1846 | /* We're storing the current CFA reg into the stack. */ | |
1847 | ||
1848 | if (cfa.offset == 0) | |
1849 | { | |
1850 | /* If the source register is exactly the CFA, assume | |
1851 | we're saving SP like any other register; this happens | |
1852 | on the ARM. */ | |
e09bbb25 | 1853 | def_cfa_1 (label, &cfa); |
f8a57be8 | 1854 | queue_reg_save (label, stack_pointer_rtx, NULL_RTX, offset); |
e09bbb25 JM |
1855 | break; |
1856 | } | |
1857 | else | |
1858 | { | |
1859 | /* Otherwise, we'll need to look in the stack to | |
73c68f61 | 1860 | calculate the CFA. */ |
e09bbb25 | 1861 | rtx x = XEXP (dest, 0); |
2ad9852d | 1862 | |
f8cfc6aa | 1863 | if (!REG_P (x)) |
e09bbb25 | 1864 | x = XEXP (x, 0); |
ced3f397 | 1865 | gcc_assert (REG_P (x)); |
2ad9852d RK |
1866 | |
1867 | cfa.reg = REGNO (x); | |
e09bbb25 JM |
1868 | cfa.base_offset = offset; |
1869 | cfa.indirect = 1; | |
1870 | def_cfa_1 (label, &cfa); | |
1871 | break; | |
1872 | } | |
1873 | } | |
1874 | ||
7d9d8943 | 1875 | def_cfa_1 (label, &cfa); |
f8a57be8 | 1876 | queue_reg_save (label, src, NULL_RTX, offset); |
2618f955 MM |
1877 | break; |
1878 | ||
1879 | default: | |
ced3f397 | 1880 | gcc_unreachable (); |
2618f955 | 1881 | } |
b664de3a AM |
1882 | } |
1883 | ||
3f76745e JM |
1884 | /* Record call frame debugging information for INSN, which either |
1885 | sets SP or FP (adjusting how we calculate the frame address) or saves a | |
e0c0490b RH |
1886 | register to the stack. If INSN is NULL_RTX, initialize our state. |
1887 | ||
1888 | If AFTER_P is false, we're being called before the insn is emitted, | |
1889 | otherwise after. Call instructions get invoked twice. */ | |
71dfc51f | 1890 | |
3f76745e | 1891 | void |
e0c0490b | 1892 | dwarf2out_frame_debug (rtx insn, bool after_p) |
a3f97cbb | 1893 | { |
d3e3972c | 1894 | const char *label; |
b664de3a | 1895 | rtx src; |
3f76745e JM |
1896 | |
1897 | if (insn == NULL_RTX) | |
a3f97cbb | 1898 | { |
f8a57be8 | 1899 | size_t i; |
a1c496cb | 1900 | |
fbfa55b0 RH |
1901 | /* Flush any queued register saves. */ |
1902 | flush_queued_reg_saves (); | |
1903 | ||
3f76745e | 1904 | /* Set up state for generating call frame debug info. */ |
7d9d8943 | 1905 | lookup_cfa (&cfa); |
ced3f397 NS |
1906 | gcc_assert (cfa.reg |
1907 | == (unsigned long)DWARF_FRAME_REGNUM (STACK_POINTER_REGNUM)); | |
2ad9852d | 1908 | |
7d9d8943 AM |
1909 | cfa.reg = STACK_POINTER_REGNUM; |
1910 | cfa_store = cfa; | |
770ca8c6 JO |
1911 | cfa_temp.reg = -1; |
1912 | cfa_temp.offset = 0; | |
a1c496cb | 1913 | |
f8a57be8 GK |
1914 | for (i = 0; i < num_regs_saved_in_regs; i++) |
1915 | { | |
1916 | regs_saved_in_regs[i].orig_reg = NULL_RTX; | |
1917 | regs_saved_in_regs[i].saved_in_reg = NULL_RTX; | |
1918 | } | |
1919 | num_regs_saved_in_regs = 0; | |
3f76745e JM |
1920 | return; |
1921 | } | |
1922 | ||
4b4bf941 | 1923 | if (!NONJUMP_INSN_P (insn) || clobbers_queued_reg_save (insn)) |
fbfa55b0 RH |
1924 | flush_queued_reg_saves (); |
1925 | ||
0021b564 JM |
1926 | if (! RTX_FRAME_RELATED_P (insn)) |
1927 | { | |
fbfa55b0 | 1928 | if (!ACCUMULATE_OUTGOING_ARGS) |
e0c0490b | 1929 | dwarf2out_stack_adjust (insn, after_p); |
0021b564 JM |
1930 | return; |
1931 | } | |
1932 | ||
3f76745e | 1933 | label = dwarf2out_cfi_label (); |
07ebc930 RH |
1934 | src = find_reg_note (insn, REG_FRAME_RELATED_EXPR, NULL_RTX); |
1935 | if (src) | |
1936 | insn = XEXP (src, 0); | |
556273e0 | 1937 | else |
07ebc930 RH |
1938 | insn = PATTERN (insn); |
1939 | ||
b664de3a | 1940 | dwarf2out_frame_debug_expr (insn, label); |
3f76745e JM |
1941 | } |
1942 | ||
17211ab5 GK |
1943 | #endif |
1944 | ||
1945 | /* Describe for the GTY machinery what parts of dw_cfi_oprnd1 are used. */ | |
7080f735 AJ |
1946 | static enum dw_cfi_oprnd_type dw_cfi_oprnd1_desc |
1947 | (enum dwarf_call_frame_info cfi); | |
17211ab5 GK |
1948 | |
1949 | static enum dw_cfi_oprnd_type | |
7080f735 | 1950 | dw_cfi_oprnd1_desc (enum dwarf_call_frame_info cfi) |
17211ab5 GK |
1951 | { |
1952 | switch (cfi) | |
1953 | { | |
1954 | case DW_CFA_nop: | |
1955 | case DW_CFA_GNU_window_save: | |
1956 | return dw_cfi_oprnd_unused; | |
1957 | ||
1958 | case DW_CFA_set_loc: | |
1959 | case DW_CFA_advance_loc1: | |
1960 | case DW_CFA_advance_loc2: | |
1961 | case DW_CFA_advance_loc4: | |
1962 | case DW_CFA_MIPS_advance_loc8: | |
1963 | return dw_cfi_oprnd_addr; | |
1964 | ||
1965 | case DW_CFA_offset: | |
1966 | case DW_CFA_offset_extended: | |
1967 | case DW_CFA_def_cfa: | |
1968 | case DW_CFA_offset_extended_sf: | |
1969 | case DW_CFA_def_cfa_sf: | |
1970 | case DW_CFA_restore_extended: | |
1971 | case DW_CFA_undefined: | |
1972 | case DW_CFA_same_value: | |
1973 | case DW_CFA_def_cfa_register: | |
1974 | case DW_CFA_register: | |
1975 | return dw_cfi_oprnd_reg_num; | |
1976 | ||
1977 | case DW_CFA_def_cfa_offset: | |
1978 | case DW_CFA_GNU_args_size: | |
1979 | case DW_CFA_def_cfa_offset_sf: | |
1980 | return dw_cfi_oprnd_offset; | |
7080f735 | 1981 | |
17211ab5 GK |
1982 | case DW_CFA_def_cfa_expression: |
1983 | case DW_CFA_expression: | |
1984 | return dw_cfi_oprnd_loc; | |
1985 | ||
1986 | default: | |
ced3f397 | 1987 | gcc_unreachable (); |
17211ab5 GK |
1988 | } |
1989 | } | |
1990 | ||
1991 | /* Describe for the GTY machinery what parts of dw_cfi_oprnd2 are used. */ | |
7080f735 AJ |
1992 | static enum dw_cfi_oprnd_type dw_cfi_oprnd2_desc |
1993 | (enum dwarf_call_frame_info cfi); | |
17211ab5 GK |
1994 | |
1995 | static enum dw_cfi_oprnd_type | |
7080f735 | 1996 | dw_cfi_oprnd2_desc (enum dwarf_call_frame_info cfi) |
17211ab5 GK |
1997 | { |
1998 | switch (cfi) | |
1999 | { | |
2000 | case DW_CFA_def_cfa: | |
2001 | case DW_CFA_def_cfa_sf: | |
2002 | case DW_CFA_offset: | |
2003 | case DW_CFA_offset_extended_sf: | |
2004 | case DW_CFA_offset_extended: | |
2005 | return dw_cfi_oprnd_offset; | |
2006 | ||
2007 | case DW_CFA_register: | |
2008 | return dw_cfi_oprnd_reg_num; | |
2009 | ||
2010 | default: | |
2011 | return dw_cfi_oprnd_unused; | |
2012 | } | |
2013 | } | |
2014 | ||
2015 | #if defined (DWARF2_DEBUGGING_INFO) || defined (DWARF2_UNWIND_INFO) | |
2016 | ||
d6b5193b RS |
2017 | /* Switch to eh_frame_section. If we don't have an eh_frame_section, |
2018 | switch to the data section instead, and write out a synthetic label | |
2019 | for collect2. */ | |
2020 | ||
2021 | static void | |
2022 | switch_to_eh_frame_section (void) | |
2023 | { | |
2024 | tree label; | |
2025 | ||
0f67af1c RS |
2026 | #ifdef EH_FRAME_SECTION_NAME |
2027 | if (eh_frame_section == 0) | |
2028 | { | |
2029 | int flags; | |
2030 | ||
2031 | if (EH_TABLES_CAN_BE_READ_ONLY) | |
2032 | { | |
2033 | int fde_encoding; | |
2034 | int per_encoding; | |
2035 | int lsda_encoding; | |
2036 | ||
2037 | fde_encoding = ASM_PREFERRED_EH_DATA_FORMAT (/*code=*/1, | |
2038 | /*global=*/0); | |
2039 | per_encoding = ASM_PREFERRED_EH_DATA_FORMAT (/*code=*/2, | |
2040 | /*global=*/1); | |
2041 | lsda_encoding = ASM_PREFERRED_EH_DATA_FORMAT (/*code=*/0, | |
2042 | /*global=*/0); | |
2043 | flags = ((! flag_pic | |
2044 | || ((fde_encoding & 0x70) != DW_EH_PE_absptr | |
2045 | && (fde_encoding & 0x70) != DW_EH_PE_aligned | |
2046 | && (per_encoding & 0x70) != DW_EH_PE_absptr | |
2047 | && (per_encoding & 0x70) != DW_EH_PE_aligned | |
2048 | && (lsda_encoding & 0x70) != DW_EH_PE_absptr | |
2049 | && (lsda_encoding & 0x70) != DW_EH_PE_aligned)) | |
2050 | ? 0 : SECTION_WRITE); | |
2051 | } | |
2052 | else | |
2053 | flags = SECTION_WRITE; | |
2054 | eh_frame_section = get_section (EH_FRAME_SECTION_NAME, flags, NULL); | |
2055 | } | |
2056 | #endif | |
2057 | ||
d6b5193b RS |
2058 | if (eh_frame_section) |
2059 | switch_to_section (eh_frame_section); | |
2060 | else | |
2061 | { | |
0f67af1c RS |
2062 | /* We have no special eh_frame section. Put the information in |
2063 | the data section and emit special labels to guide collect2. */ | |
d6b5193b | 2064 | switch_to_section (data_section); |
5880f14f | 2065 | label = get_file_function_name ("F"); |
d6b5193b RS |
2066 | ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (PTR_SIZE)); |
2067 | targetm.asm_out.globalize_label (asm_out_file, | |
2068 | IDENTIFIER_POINTER (label)); | |
2069 | ASM_OUTPUT_LABEL (asm_out_file, IDENTIFIER_POINTER (label)); | |
2070 | } | |
2071 | } | |
2072 | ||
3f76745e JM |
2073 | /* Output a Call Frame Information opcode and its operand(s). */ |
2074 | ||
2075 | static void | |
7080f735 | 2076 | output_cfi (dw_cfi_ref cfi, dw_fde_ref fde, int for_eh) |
3f76745e | 2077 | { |
34c80057 | 2078 | unsigned long r; |
3f76745e | 2079 | if (cfi->dw_cfi_opc == DW_CFA_advance_loc) |
2ad9852d RK |
2080 | dw2_asm_output_data (1, (cfi->dw_cfi_opc |
2081 | | (cfi->dw_cfi_oprnd1.dw_cfi_offset & 0x3f)), | |
38f9cd4c | 2082 | "DW_CFA_advance_loc " HOST_WIDE_INT_PRINT_HEX, |
2ad9852d | 2083 | cfi->dw_cfi_oprnd1.dw_cfi_offset); |
3f76745e JM |
2084 | else if (cfi->dw_cfi_opc == DW_CFA_offset) |
2085 | { | |
34c80057 AM |
2086 | r = DWARF2_FRAME_REG_OUT (cfi->dw_cfi_oprnd1.dw_cfi_reg_num, for_eh); |
2087 | dw2_asm_output_data (1, (cfi->dw_cfi_opc | (r & 0x3f)), | |
2088 | "DW_CFA_offset, column 0x%lx", r); | |
2e4b9b8c | 2089 | dw2_asm_output_data_uleb128 (cfi->dw_cfi_oprnd2.dw_cfi_offset, NULL); |
3f76745e JM |
2090 | } |
2091 | else if (cfi->dw_cfi_opc == DW_CFA_restore) | |
34c80057 AM |
2092 | { |
2093 | r = DWARF2_FRAME_REG_OUT (cfi->dw_cfi_oprnd1.dw_cfi_reg_num, for_eh); | |
2094 | dw2_asm_output_data (1, (cfi->dw_cfi_opc | (r & 0x3f)), | |
2095 | "DW_CFA_restore, column 0x%lx", r); | |
2096 | } | |
3f76745e JM |
2097 | else |
2098 | { | |
2e4b9b8c RH |
2099 | dw2_asm_output_data (1, cfi->dw_cfi_opc, |
2100 | "%s", dwarf_cfi_name (cfi->dw_cfi_opc)); | |
3f76745e | 2101 | |
3f76745e JM |
2102 | switch (cfi->dw_cfi_opc) |
2103 | { | |
2104 | case DW_CFA_set_loc: | |
e1f9550a RH |
2105 | if (for_eh) |
2106 | dw2_asm_output_encoded_addr_rtx ( | |
2107 | ASM_PREFERRED_EH_DATA_FORMAT (/*code=*/1, /*global=*/0), | |
2108 | gen_rtx_SYMBOL_REF (Pmode, cfi->dw_cfi_oprnd1.dw_cfi_addr), | |
b03e9863 | 2109 | false, NULL); |
e1f9550a RH |
2110 | else |
2111 | dw2_asm_output_addr (DWARF2_ADDR_SIZE, | |
2112 | cfi->dw_cfi_oprnd1.dw_cfi_addr, NULL); | |
6a10f7b3 | 2113 | fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr; |
3f76745e | 2114 | break; |
2ad9852d | 2115 | |
3f76745e | 2116 | case DW_CFA_advance_loc1: |
2e4b9b8c RH |
2117 | dw2_asm_output_delta (1, cfi->dw_cfi_oprnd1.dw_cfi_addr, |
2118 | fde->dw_fde_current_label, NULL); | |
bb727b5a | 2119 | fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr; |
3f76745e | 2120 | break; |
2ad9852d | 2121 | |
3f76745e | 2122 | case DW_CFA_advance_loc2: |
2e4b9b8c RH |
2123 | dw2_asm_output_delta (2, cfi->dw_cfi_oprnd1.dw_cfi_addr, |
2124 | fde->dw_fde_current_label, NULL); | |
3f76745e JM |
2125 | fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr; |
2126 | break; | |
2ad9852d | 2127 | |
3f76745e | 2128 | case DW_CFA_advance_loc4: |
2e4b9b8c RH |
2129 | dw2_asm_output_delta (4, cfi->dw_cfi_oprnd1.dw_cfi_addr, |
2130 | fde->dw_fde_current_label, NULL); | |
3f76745e JM |
2131 | fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr; |
2132 | break; | |
2ad9852d | 2133 | |
3f76745e | 2134 | case DW_CFA_MIPS_advance_loc8: |
2e4b9b8c RH |
2135 | dw2_asm_output_delta (8, cfi->dw_cfi_oprnd1.dw_cfi_addr, |
2136 | fde->dw_fde_current_label, NULL); | |
2137 | fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr; | |
3f76745e | 2138 | break; |
2ad9852d | 2139 | |
3f76745e JM |
2140 | case DW_CFA_offset_extended: |
2141 | case DW_CFA_def_cfa: | |
34c80057 AM |
2142 | r = DWARF2_FRAME_REG_OUT (cfi->dw_cfi_oprnd1.dw_cfi_reg_num, for_eh); |
2143 | dw2_asm_output_data_uleb128 (r, NULL); | |
2e4b9b8c | 2144 | dw2_asm_output_data_uleb128 (cfi->dw_cfi_oprnd2.dw_cfi_offset, NULL); |
3f76745e | 2145 | break; |
2ad9852d | 2146 | |
6bb28965 JM |
2147 | case DW_CFA_offset_extended_sf: |
2148 | case DW_CFA_def_cfa_sf: | |
34c80057 AM |
2149 | r = DWARF2_FRAME_REG_OUT (cfi->dw_cfi_oprnd1.dw_cfi_reg_num, for_eh); |
2150 | dw2_asm_output_data_uleb128 (r, NULL); | |
6bb28965 JM |
2151 | dw2_asm_output_data_sleb128 (cfi->dw_cfi_oprnd2.dw_cfi_offset, NULL); |
2152 | break; | |
2153 | ||
3f76745e JM |
2154 | case DW_CFA_restore_extended: |
2155 | case DW_CFA_undefined: | |
3f76745e JM |
2156 | case DW_CFA_same_value: |
2157 | case DW_CFA_def_cfa_register: | |
34c80057 AM |
2158 | r = DWARF2_FRAME_REG_OUT (cfi->dw_cfi_oprnd1.dw_cfi_reg_num, for_eh); |
2159 | dw2_asm_output_data_uleb128 (r, NULL); | |
3f76745e | 2160 | break; |
2ad9852d | 2161 | |
3f76745e | 2162 | case DW_CFA_register: |
34c80057 AM |
2163 | r = DWARF2_FRAME_REG_OUT (cfi->dw_cfi_oprnd1.dw_cfi_reg_num, for_eh); |
2164 | dw2_asm_output_data_uleb128 (r, NULL); | |
2165 | r = DWARF2_FRAME_REG_OUT (cfi->dw_cfi_oprnd2.dw_cfi_reg_num, for_eh); | |
2166 | dw2_asm_output_data_uleb128 (r, NULL); | |
3f76745e | 2167 | break; |
2ad9852d | 2168 | |
3f76745e | 2169 | case DW_CFA_def_cfa_offset: |
2e4b9b8c RH |
2170 | case DW_CFA_GNU_args_size: |
2171 | dw2_asm_output_data_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_offset, NULL); | |
3f76745e | 2172 | break; |
2ad9852d | 2173 | |
6bb28965 JM |
2174 | case DW_CFA_def_cfa_offset_sf: |
2175 | dw2_asm_output_data_sleb128 (cfi->dw_cfi_oprnd1.dw_cfi_offset, NULL); | |
2176 | break; | |
2177 | ||
c53aa195 JM |
2178 | case DW_CFA_GNU_window_save: |
2179 | break; | |
2ad9852d | 2180 | |
7d9d8943 | 2181 | case DW_CFA_def_cfa_expression: |
6bb28965 | 2182 | case DW_CFA_expression: |
7d9d8943 AM |
2183 | output_cfa_loc (cfi); |
2184 | break; | |
2ad9852d | 2185 | |
6bb28965 JM |
2186 | case DW_CFA_GNU_negative_offset_extended: |
2187 | /* Obsoleted by DW_CFA_offset_extended_sf. */ | |
ced3f397 | 2188 | gcc_unreachable (); |
6bb28965 | 2189 | |
3f76745e JM |
2190 | default: |
2191 | break; | |
2192 | } | |
556273e0 | 2193 | } |
3f76745e JM |
2194 | } |
2195 | ||
34c80057 | 2196 | /* Output the call frame information used to record information |
3f76745e JM |
2197 | that relates to calculating the frame pointer, and records the |
2198 | location of saved registers. */ | |
2199 | ||
2200 | static void | |
7080f735 | 2201 | output_call_frame_info (int for_eh) |
3f76745e | 2202 | { |
b3694847 SS |
2203 | unsigned int i; |
2204 | dw_fde_ref fde; | |
2205 | dw_cfi_ref cfi; | |
27d95cbe | 2206 | char l1[20], l2[20], section_start_label[20]; |
ad5eeaa9 | 2207 | bool any_lsda_needed = false; |
52a11cbf | 2208 | char augmentation[6]; |
e1f9550a RH |
2209 | int augmentation_size; |
2210 | int fde_encoding = DW_EH_PE_absptr; | |
2211 | int per_encoding = DW_EH_PE_absptr; | |
2212 | int lsda_encoding = DW_EH_PE_absptr; | |
32df413a | 2213 | int return_reg; |
3f76745e | 2214 | |
29b91443 JM |
2215 | /* Don't emit a CIE if there won't be any FDEs. */ |
2216 | if (fde_table_in_use == 0) | |
2217 | return; | |
2218 | ||
4746cf84 MA |
2219 | /* If we make FDEs linkonce, we may have to emit an empty label for |
2220 | an FDE that wouldn't otherwise be emitted. We want to avoid | |
2221 | having an FDE kept around when the function it refers to is | |
f1a66265 | 2222 | discarded. Example where this matters: a primary function |
4746cf84 | 2223 | template in C++ requires EH information, but an explicit |
9cf737f8 | 2224 | specialization doesn't. */ |
4746cf84 MA |
2225 | if (TARGET_USES_WEAK_UNWIND_INFO |
2226 | && ! flag_asynchronous_unwind_tables | |
2227 | && for_eh) | |
2228 | for (i = 0; i < fde_table_in_use; i++) | |
2229 | if ((fde_table[i].nothrow || fde_table[i].all_throwers_are_sibcalls) | |
2878ea73 | 2230 | && !fde_table[i].uses_eh_lsda |
f1a66265 | 2231 | && ! DECL_WEAK (fde_table[i].decl)) |
5fd9b178 | 2232 | targetm.asm_out.unwind_label (asm_out_file, fde_table[i].decl, |
eeab4d81 | 2233 | for_eh, /* empty */ 1); |
4746cf84 | 2234 | |
ad5eeaa9 RH |
2235 | /* If we don't have any functions we'll want to unwind out of, don't |
2236 | emit any EH unwind information. Note that if exceptions aren't | |
2237 | enabled, we won't have collected nothrow information, and if we | |
2238 | asked for asynchronous tables, we always want this info. */ | |
737faf14 JM |
2239 | if (for_eh) |
2240 | { | |
ad5eeaa9 | 2241 | bool any_eh_needed = !flag_exceptions || flag_asynchronous_unwind_tables; |
2ad9852d RK |
2242 | |
2243 | for (i = 0; i < fde_table_in_use; i++) | |
52a11cbf | 2244 | if (fde_table[i].uses_eh_lsda) |
ad5eeaa9 | 2245 | any_eh_needed = any_lsda_needed = true; |
2878ea73 | 2246 | else if (TARGET_USES_WEAK_UNWIND_INFO && DECL_WEAK (fde_table[i].decl)) |
aeb732c1 | 2247 | any_eh_needed = true; |
0366359a GK |
2248 | else if (! fde_table[i].nothrow |
2249 | && ! fde_table[i].all_throwers_are_sibcalls) | |
ad5eeaa9 | 2250 | any_eh_needed = true; |
52a11cbf RH |
2251 | |
2252 | if (! any_eh_needed) | |
2253 | return; | |
737faf14 JM |
2254 | } |
2255 | ||
aa0c1401 JL |
2256 | /* We're going to be generating comments, so turn on app. */ |
2257 | if (flag_debug_asm) | |
2258 | app_enable (); | |
956d6950 | 2259 | |
3f76745e | 2260 | if (for_eh) |
d6b5193b | 2261 | switch_to_eh_frame_section (); |
3f76745e | 2262 | else |
10934c3b RS |
2263 | { |
2264 | if (!debug_frame_section) | |
2265 | debug_frame_section = get_section (DEBUG_FRAME_SECTION, | |
2266 | SECTION_DEBUG, NULL); | |
2267 | switch_to_section (debug_frame_section); | |
2268 | } | |
3f76745e | 2269 | |
27d95cbe RH |
2270 | ASM_GENERATE_INTERNAL_LABEL (section_start_label, FRAME_BEGIN_LABEL, for_eh); |
2271 | ASM_OUTPUT_LABEL (asm_out_file, section_start_label); | |
2272 | ||
556273e0 | 2273 | /* Output the CIE. */ |
a6ab3aad JM |
2274 | ASM_GENERATE_INTERNAL_LABEL (l1, CIE_AFTER_SIZE_LABEL, for_eh); |
2275 | ASM_GENERATE_INTERNAL_LABEL (l2, CIE_END_LABEL, for_eh); | |
0c33762a JM |
2276 | if (DWARF_INITIAL_LENGTH_SIZE - DWARF_OFFSET_SIZE == 4 && !for_eh) |
2277 | dw2_asm_output_data (4, 0xffffffff, | |
2278 | "Initial length escape value indicating 64-bit DWARF extension"); | |
2e4b9b8c RH |
2279 | dw2_asm_output_delta (for_eh ? 4 : DWARF_OFFSET_SIZE, l2, l1, |
2280 | "Length of Common Information Entry"); | |
a6ab3aad JM |
2281 | ASM_OUTPUT_LABEL (asm_out_file, l1); |
2282 | ||
2e4b9b8c RH |
2283 | /* Now that the CIE pointer is PC-relative for EH, |
2284 | use 0 to identify the CIE. */ | |
2285 | dw2_asm_output_data ((for_eh ? 4 : DWARF_OFFSET_SIZE), | |
0c33762a | 2286 | (for_eh ? 0 : DWARF_CIE_ID), |
2e4b9b8c | 2287 | "CIE Identifier Tag"); |
3f76745e | 2288 | |
2e4b9b8c | 2289 | dw2_asm_output_data (1, DW_CIE_VERSION, "CIE Version"); |
3f76745e | 2290 | |
52a11cbf | 2291 | augmentation[0] = 0; |
e1f9550a | 2292 | augmentation_size = 0; |
52a11cbf | 2293 | if (for_eh) |
a6ab3aad | 2294 | { |
e1f9550a RH |
2295 | char *p; |
2296 | ||
52a11cbf RH |
2297 | /* Augmentation: |
2298 | z Indicates that a uleb128 is present to size the | |
7080f735 | 2299 | augmentation section. |
e1f9550a RH |
2300 | L Indicates the encoding (and thus presence) of |
2301 | an LSDA pointer in the FDE augmentation. | |
2302 | R Indicates a non-default pointer encoding for | |
2303 | FDE code pointers. | |
2304 | P Indicates the presence of an encoding + language | |
2305 | personality routine in the CIE augmentation. */ | |
2306 | ||
aeb732c1 | 2307 | fde_encoding = ASM_PREFERRED_EH_DATA_FORMAT (/*code=*/1, /*global=*/0); |
e1f9550a RH |
2308 | per_encoding = ASM_PREFERRED_EH_DATA_FORMAT (/*code=*/2, /*global=*/1); |
2309 | lsda_encoding = ASM_PREFERRED_EH_DATA_FORMAT (/*code=*/0, /*global=*/0); | |
2310 | ||
2311 | p = augmentation + 1; | |
2312 | if (eh_personality_libfunc) | |
2313 | { | |
2314 | *p++ = 'P'; | |
2315 | augmentation_size += 1 + size_of_encoded_value (per_encoding); | |
2a6acff7 | 2316 | assemble_external_libcall (eh_personality_libfunc); |
e1f9550a | 2317 | } |
52a11cbf | 2318 | if (any_lsda_needed) |
e1f9550a RH |
2319 | { |
2320 | *p++ = 'L'; | |
2321 | augmentation_size += 1; | |
2322 | } | |
2323 | if (fde_encoding != DW_EH_PE_absptr) | |
2324 | { | |
2325 | *p++ = 'R'; | |
2326 | augmentation_size += 1; | |
2327 | } | |
2328 | if (p > augmentation + 1) | |
2329 | { | |
2330 | augmentation[0] = 'z'; | |
c26fbbca | 2331 | *p = '\0'; |
e1f9550a | 2332 | } |
099c8b17 RH |
2333 | |
2334 | /* Ug. Some platforms can't do unaligned dynamic relocations at all. */ | |
2335 | if (eh_personality_libfunc && per_encoding == DW_EH_PE_aligned) | |
2336 | { | |
2337 | int offset = ( 4 /* Length */ | |
2338 | + 4 /* CIE Id */ | |
2339 | + 1 /* CIE version */ | |
2340 | + strlen (augmentation) + 1 /* Augmentation */ | |
2341 | + size_of_uleb128 (1) /* Code alignment */ | |
2342 | + size_of_sleb128 (DWARF_CIE_DATA_ALIGNMENT) | |
2343 | + 1 /* RA column */ | |
2344 | + 1 /* Augmentation size */ | |
2345 | + 1 /* Personality encoding */ ); | |
2346 | int pad = -offset & (PTR_SIZE - 1); | |
2347 | ||
2348 | augmentation_size += pad; | |
2349 | ||
2350 | /* Augmentations should be small, so there's scarce need to | |
2351 | iterate for a solution. Die if we exceed one uleb128 byte. */ | |
ced3f397 | 2352 | gcc_assert (size_of_uleb128 (augmentation_size) == 1); |
099c8b17 | 2353 | } |
a6ab3aad | 2354 | } |
3f76745e | 2355 | |
2ad9852d | 2356 | dw2_asm_output_nstring (augmentation, -1, "CIE Augmentation"); |
2e4b9b8c | 2357 | dw2_asm_output_data_uleb128 (1, "CIE Code Alignment Factor"); |
2e4b9b8c RH |
2358 | dw2_asm_output_data_sleb128 (DWARF_CIE_DATA_ALIGNMENT, |
2359 | "CIE Data Alignment Factor"); | |
fc9c8ce1 | 2360 | |
32df413a | 2361 | return_reg = DWARF2_FRAME_REG_OUT (DWARF_FRAME_RETURN_COLUMN, for_eh); |
fc9c8ce1 | 2362 | if (DW_CIE_VERSION == 1) |
32df413a | 2363 | dw2_asm_output_data (1, return_reg, "CIE RA Column"); |
fc9c8ce1 | 2364 | else |
32df413a | 2365 | dw2_asm_output_data_uleb128 (return_reg, "CIE RA Column"); |
3f76745e | 2366 | |
52a11cbf RH |
2367 | if (augmentation[0]) |
2368 | { | |
e1f9550a | 2369 | dw2_asm_output_data_uleb128 (augmentation_size, "Augmentation size"); |
52a11cbf | 2370 | if (eh_personality_libfunc) |
e1f9550a RH |
2371 | { |
2372 | dw2_asm_output_data (1, per_encoding, "Personality (%s)", | |
2373 | eh_data_format_name (per_encoding)); | |
2374 | dw2_asm_output_encoded_addr_rtx (per_encoding, | |
b03e9863 EB |
2375 | eh_personality_libfunc, |
2376 | true, NULL); | |
e1f9550a | 2377 | } |
2ad9852d | 2378 | |
e1f9550a RH |
2379 | if (any_lsda_needed) |
2380 | dw2_asm_output_data (1, lsda_encoding, "LSDA Encoding (%s)", | |
2381 | eh_data_format_name (lsda_encoding)); | |
2ad9852d | 2382 | |
e1f9550a RH |
2383 | if (fde_encoding != DW_EH_PE_absptr) |
2384 | dw2_asm_output_data (1, fde_encoding, "FDE Encoding (%s)", | |
2385 | eh_data_format_name (fde_encoding)); | |
52a11cbf RH |
2386 | } |
2387 | ||
3f76745e | 2388 | for (cfi = cie_cfi_head; cfi != NULL; cfi = cfi->dw_cfi_next) |
12f0b96b | 2389 | output_cfi (cfi, NULL, for_eh); |
3f76745e JM |
2390 | |
2391 | /* Pad the CIE out to an address sized boundary. */ | |
c26fbbca | 2392 | ASM_OUTPUT_ALIGN (asm_out_file, |
12f0b96b | 2393 | floor_log2 (for_eh ? PTR_SIZE : DWARF2_ADDR_SIZE)); |
a6ab3aad | 2394 | ASM_OUTPUT_LABEL (asm_out_file, l2); |
3f76745e JM |
2395 | |
2396 | /* Loop through all of the FDE's. */ | |
2ad9852d | 2397 | for (i = 0; i < fde_table_in_use; i++) |
3f76745e JM |
2398 | { |
2399 | fde = &fde_table[i]; | |
3f76745e | 2400 | |
52a11cbf | 2401 | /* Don't emit EH unwind info for leaf functions that don't need it. */ |
ad5eeaa9 | 2402 | if (for_eh && !flag_asynchronous_unwind_tables && flag_exceptions |
b6128b8c | 2403 | && (fde->nothrow || fde->all_throwers_are_sibcalls) |
f1a66265 | 2404 | && ! (TARGET_USES_WEAK_UNWIND_INFO && DECL_WEAK (fde_table[i].decl)) |
b6128b8c | 2405 | && !fde->uses_eh_lsda) |
737faf14 JM |
2406 | continue; |
2407 | ||
eeab4d81 | 2408 | targetm.asm_out.unwind_label (asm_out_file, fde->decl, for_eh, /* empty */ 0); |
5fd9b178 | 2409 | targetm.asm_out.internal_label (asm_out_file, FDE_LABEL, for_eh + i * 2); |
556273e0 KH |
2410 | ASM_GENERATE_INTERNAL_LABEL (l1, FDE_AFTER_SIZE_LABEL, for_eh + i * 2); |
2411 | ASM_GENERATE_INTERNAL_LABEL (l2, FDE_END_LABEL, for_eh + i * 2); | |
0c33762a JM |
2412 | if (DWARF_INITIAL_LENGTH_SIZE - DWARF_OFFSET_SIZE == 4 && !for_eh) |
2413 | dw2_asm_output_data (4, 0xffffffff, | |
2414 | "Initial length escape value indicating 64-bit DWARF extension"); | |
2e4b9b8c RH |
2415 | dw2_asm_output_delta (for_eh ? 4 : DWARF_OFFSET_SIZE, l2, l1, |
2416 | "FDE Length"); | |
a6ab3aad JM |
2417 | ASM_OUTPUT_LABEL (asm_out_file, l1); |
2418 | ||
3f76745e | 2419 | if (for_eh) |
27d95cbe | 2420 | dw2_asm_output_delta (4, l1, section_start_label, "FDE CIE offset"); |
3f76745e | 2421 | else |
27d95cbe | 2422 | dw2_asm_output_offset (DWARF_OFFSET_SIZE, section_start_label, |
192d0f89 | 2423 | debug_frame_section, "FDE CIE offset"); |
3f76745e | 2424 | |
e1f9550a RH |
2425 | if (for_eh) |
2426 | { | |
aeb732c1 GK |
2427 | rtx sym_ref = gen_rtx_SYMBOL_REF (Pmode, fde->dw_fde_begin); |
2428 | SYMBOL_REF_FLAGS (sym_ref) |= SYMBOL_FLAG_LOCAL; | |
2429 | dw2_asm_output_encoded_addr_rtx (fde_encoding, | |
2430 | sym_ref, | |
b03e9863 | 2431 | false, |
aeb732c1 | 2432 | "FDE initial location"); |
87c8b4be CT |
2433 | if (fde->dw_fde_switched_sections) |
2434 | { | |
2878ea73 | 2435 | rtx sym_ref2 = gen_rtx_SYMBOL_REF (Pmode, |
87c8b4be | 2436 | fde->dw_fde_unlikely_section_label); |
2878ea73 | 2437 | rtx sym_ref3= gen_rtx_SYMBOL_REF (Pmode, |
87c8b4be CT |
2438 | fde->dw_fde_hot_section_label); |
2439 | SYMBOL_REF_FLAGS (sym_ref2) |= SYMBOL_FLAG_LOCAL; | |
2440 | SYMBOL_REF_FLAGS (sym_ref3) |= SYMBOL_FLAG_LOCAL; | |
b03e9863 | 2441 | dw2_asm_output_encoded_addr_rtx (fde_encoding, sym_ref3, false, |
87c8b4be CT |
2442 | "FDE initial location"); |
2443 | dw2_asm_output_delta (size_of_encoded_value (fde_encoding), | |
2444 | fde->dw_fde_hot_section_end_label, | |
2445 | fde->dw_fde_hot_section_label, | |
2446 | "FDE address range"); | |
b03e9863 | 2447 | dw2_asm_output_encoded_addr_rtx (fde_encoding, sym_ref2, false, |
87c8b4be CT |
2448 | "FDE initial location"); |
2449 | dw2_asm_output_delta (size_of_encoded_value (fde_encoding), | |
2450 | fde->dw_fde_unlikely_section_end_label, | |
2451 | fde->dw_fde_unlikely_section_label, | |
2452 | "FDE address range"); | |
2453 | } | |
2454 | else | |
2455 | dw2_asm_output_delta (size_of_encoded_value (fde_encoding), | |
2456 | fde->dw_fde_end, fde->dw_fde_begin, | |
2457 | "FDE address range"); | |
e1f9550a RH |
2458 | } |
2459 | else | |
2460 | { | |
2461 | dw2_asm_output_addr (DWARF2_ADDR_SIZE, fde->dw_fde_begin, | |
2462 | "FDE initial location"); | |
87c8b4be CT |
2463 | if (fde->dw_fde_switched_sections) |
2464 | { | |
2465 | dw2_asm_output_addr (DWARF2_ADDR_SIZE, | |
2466 | fde->dw_fde_hot_section_label, | |
2467 | "FDE initial location"); | |
2468 | dw2_asm_output_delta (DWARF2_ADDR_SIZE, | |
2469 | fde->dw_fde_hot_section_end_label, | |
2470 | fde->dw_fde_hot_section_label, | |
2471 | "FDE address range"); | |
2472 | dw2_asm_output_addr (DWARF2_ADDR_SIZE, | |
2473 | fde->dw_fde_unlikely_section_label, | |
2474 | "FDE initial location"); | |
2878ea73 | 2475 | dw2_asm_output_delta (DWARF2_ADDR_SIZE, |
87c8b4be CT |
2476 | fde->dw_fde_unlikely_section_end_label, |
2477 | fde->dw_fde_unlikely_section_label, | |
2478 | "FDE address range"); | |
2479 | } | |
2480 | else | |
2481 | dw2_asm_output_delta (DWARF2_ADDR_SIZE, | |
2482 | fde->dw_fde_end, fde->dw_fde_begin, | |
2483 | "FDE address range"); | |
e1f9550a | 2484 | } |
3f76745e | 2485 | |
52a11cbf RH |
2486 | if (augmentation[0]) |
2487 | { | |
e1f9550a | 2488 | if (any_lsda_needed) |
52a11cbf | 2489 | { |
099c8b17 RH |
2490 | int size = size_of_encoded_value (lsda_encoding); |
2491 | ||
2492 | if (lsda_encoding == DW_EH_PE_aligned) | |
2493 | { | |
2494 | int offset = ( 4 /* Length */ | |
2495 | + 4 /* CIE offset */ | |
2496 | + 2 * size_of_encoded_value (fde_encoding) | |
2497 | + 1 /* Augmentation size */ ); | |
2498 | int pad = -offset & (PTR_SIZE - 1); | |
2499 | ||
2500 | size += pad; | |
ced3f397 | 2501 | gcc_assert (size_of_uleb128 (size) == 1); |
099c8b17 RH |
2502 | } |
2503 | ||
2504 | dw2_asm_output_data_uleb128 (size, "Augmentation size"); | |
e1f9550a RH |
2505 | |
2506 | if (fde->uses_eh_lsda) | |
73c68f61 SS |
2507 | { |
2508 | ASM_GENERATE_INTERNAL_LABEL (l1, "LLSDA", | |
e1f9550a | 2509 | fde->funcdef_number); |
73c68f61 | 2510 | dw2_asm_output_encoded_addr_rtx ( |
e1f9550a | 2511 | lsda_encoding, gen_rtx_SYMBOL_REF (Pmode, l1), |
b03e9863 | 2512 | false, "Language Specific Data Area"); |
73c68f61 | 2513 | } |
e1f9550a | 2514 | else |
099c8b17 RH |
2515 | { |
2516 | if (lsda_encoding == DW_EH_PE_aligned) | |
2517 | ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (PTR_SIZE)); | |
2ad9852d RK |
2518 | dw2_asm_output_data |
2519 | (size_of_encoded_value (lsda_encoding), 0, | |
2520 | "Language Specific Data Area (none)"); | |
099c8b17 | 2521 | } |
52a11cbf RH |
2522 | } |
2523 | else | |
e1f9550a | 2524 | dw2_asm_output_data_uleb128 (0, "Augmentation size"); |
52a11cbf RH |
2525 | } |
2526 | ||
3f76745e JM |
2527 | /* Loop through the Call Frame Instructions associated with |
2528 | this FDE. */ | |
2529 | fde->dw_fde_current_label = fde->dw_fde_begin; | |
2530 | for (cfi = fde->dw_fde_cfi; cfi != NULL; cfi = cfi->dw_cfi_next) | |
12f0b96b | 2531 | output_cfi (cfi, fde, for_eh); |
3f76745e | 2532 | |
a6ab3aad | 2533 | /* Pad the FDE out to an address sized boundary. */ |
c26fbbca | 2534 | ASM_OUTPUT_ALIGN (asm_out_file, |
73c68f61 | 2535 | floor_log2 ((for_eh ? PTR_SIZE : DWARF2_ADDR_SIZE))); |
a6ab3aad | 2536 | ASM_OUTPUT_LABEL (asm_out_file, l2); |
3f76745e | 2537 | } |
2e4b9b8c | 2538 | |
7606e68f | 2539 | if (for_eh && targetm.terminate_dw2_eh_frame_info) |
2e4b9b8c | 2540 | dw2_asm_output_data (4, 0, "End of Table"); |
a6ab3aad JM |
2541 | #ifdef MIPS_DEBUGGING_INFO |
2542 | /* Work around Irix 6 assembler bug whereby labels at the end of a section | |
2543 | get a value of 0. Putting .align 0 after the label fixes it. */ | |
2544 | ASM_OUTPUT_ALIGN (asm_out_file, 0); | |
2545 | #endif | |
aa0c1401 JL |
2546 | |
2547 | /* Turn off app to make assembly quicker. */ | |
2548 | if (flag_debug_asm) | |
2549 | app_disable (); | |
a6ab3aad JM |
2550 | } |
2551 | ||
3f76745e JM |
2552 | /* Output a marker (i.e. a label) for the beginning of a function, before |
2553 | the prologue. */ | |
2554 | ||
2555 | void | |
7080f735 AJ |
2556 | dwarf2out_begin_prologue (unsigned int line ATTRIBUTE_UNUSED, |
2557 | const char *file ATTRIBUTE_UNUSED) | |
3f76745e JM |
2558 | { |
2559 | char label[MAX_ARTIFICIAL_LABEL_BYTES]; | |
375d2edc | 2560 | char * dup_label; |
b3694847 | 2561 | dw_fde_ref fde; |
3f76745e | 2562 | |
375d2edc | 2563 | current_function_func_begin_label = NULL; |
2a1ee410 | 2564 | |
951120ea | 2565 | #ifdef TARGET_UNWIND_INFO |
2a1ee410 RH |
2566 | /* ??? current_function_func_begin_label is also used by except.c |
2567 | for call-site information. We must emit this label if it might | |
2568 | be used. */ | |
2569 | if ((! flag_exceptions || USING_SJLJ_EXCEPTIONS) | |
2570 | && ! dwarf2out_do_frame ()) | |
2571 | return; | |
2572 | #else | |
2573 | if (! dwarf2out_do_frame ()) | |
2574 | return; | |
2575 | #endif | |
2576 | ||
d6b5193b | 2577 | switch_to_section (function_section (current_function_decl)); |
3f76745e | 2578 | ASM_GENERATE_INTERNAL_LABEL (label, FUNC_BEGIN_LABEL, |
df696a75 | 2579 | current_function_funcdef_no); |
2a1ee410 | 2580 | ASM_OUTPUT_DEBUG_LABEL (asm_out_file, FUNC_BEGIN_LABEL, |
df696a75 | 2581 | current_function_funcdef_no); |
375d2edc GK |
2582 | dup_label = xstrdup (label); |
2583 | current_function_func_begin_label = dup_label; | |
3f76745e | 2584 | |
951120ea | 2585 | #ifdef TARGET_UNWIND_INFO |
2a1ee410 RH |
2586 | /* We can elide the fde allocation if we're not emitting debug info. */ |
2587 | if (! dwarf2out_do_frame ()) | |
2588 | return; | |
2589 | #endif | |
2590 | ||
3f76745e JM |
2591 | /* Expand the fde table if necessary. */ |
2592 | if (fde_table_in_use == fde_table_allocated) | |
2593 | { | |
2594 | fde_table_allocated += FDE_TABLE_INCREMENT; | |
17211ab5 GK |
2595 | fde_table = ggc_realloc (fde_table, |
2596 | fde_table_allocated * sizeof (dw_fde_node)); | |
2597 | memset (fde_table + fde_table_in_use, 0, | |
2598 | FDE_TABLE_INCREMENT * sizeof (dw_fde_node)); | |
a3f97cbb | 2599 | } |
3f76745e JM |
2600 | |
2601 | /* Record the FDE associated with this function. */ | |
2602 | current_funcdef_fde = fde_table_in_use; | |
2603 | ||
2604 | /* Add the new FDE at the end of the fde_table. */ | |
2605 | fde = &fde_table[fde_table_in_use++]; | |
4746cf84 | 2606 | fde->decl = current_function_decl; |
375d2edc | 2607 | fde->dw_fde_begin = dup_label; |
72478f32 | 2608 | fde->dw_fde_current_label = dup_label; |
87c8b4be CT |
2609 | fde->dw_fde_hot_section_label = NULL; |
2610 | fde->dw_fde_hot_section_end_label = NULL; | |
2611 | fde->dw_fde_unlikely_section_label = NULL; | |
2612 | fde->dw_fde_unlikely_section_end_label = NULL; | |
2613 | fde->dw_fde_switched_sections = false; | |
3f76745e JM |
2614 | fde->dw_fde_end = NULL; |
2615 | fde->dw_fde_cfi = NULL; | |
df696a75 | 2616 | fde->funcdef_number = current_function_funcdef_no; |
97b0ade3 | 2617 | fde->nothrow = TREE_NOTHROW (current_function_decl); |
52a11cbf | 2618 | fde->uses_eh_lsda = cfun->uses_eh_lsda; |
b6128b8c | 2619 | fde->all_throwers_are_sibcalls = cfun->all_throwers_are_sibcalls; |
737faf14 | 2620 | |
b57d9225 | 2621 | args_size = old_args_size = 0; |
653e276c | 2622 | |
2ad9852d RK |
2623 | /* We only want to output line number information for the genuine dwarf2 |
2624 | prologue case, not the eh frame case. */ | |
653e276c NB |
2625 | #ifdef DWARF2_DEBUGGING_INFO |
2626 | if (file) | |
2627 | dwarf2out_source_line (line, file); | |
2628 | #endif | |
3f76745e JM |
2629 | } |
2630 | ||
2631 | /* Output a marker (i.e. a label) for the absolute end of the generated code | |
2632 | for a function definition. This gets called *after* the epilogue code has | |
2633 | been generated. */ | |
2634 | ||
2635 | void | |
7080f735 AJ |
2636 | dwarf2out_end_epilogue (unsigned int line ATTRIBUTE_UNUSED, |
2637 | const char *file ATTRIBUTE_UNUSED) | |
3f76745e JM |
2638 | { |
2639 | dw_fde_ref fde; | |
2640 | char label[MAX_ARTIFICIAL_LABEL_BYTES]; | |
2641 | ||
2642 | /* Output a label to mark the endpoint of the code generated for this | |
3ef42a0c | 2643 | function. */ |
df696a75 RH |
2644 | ASM_GENERATE_INTERNAL_LABEL (label, FUNC_END_LABEL, |
2645 | current_function_funcdef_no); | |
3f76745e JM |
2646 | ASM_OUTPUT_LABEL (asm_out_file, label); |
2647 | fde = &fde_table[fde_table_in_use - 1]; | |
2648 | fde->dw_fde_end = xstrdup (label); | |
3f76745e JM |
2649 | } |
2650 | ||
2651 | void | |
7080f735 | 2652 | dwarf2out_frame_init (void) |
3f76745e JM |
2653 | { |
2654 | /* Allocate the initial hunk of the fde_table. */ | |
703ad42b | 2655 | fde_table = ggc_alloc_cleared (FDE_TABLE_INCREMENT * sizeof (dw_fde_node)); |
3f76745e JM |
2656 | fde_table_allocated = FDE_TABLE_INCREMENT; |
2657 | fde_table_in_use = 0; | |
2658 | ||
2659 | /* Generate the CFA instructions common to all FDE's. Do it now for the | |
2660 | sake of lookup_cfa. */ | |
2661 | ||
91193900 AS |
2662 | /* On entry, the Canonical Frame Address is at SP. */ |
2663 | dwarf2out_def_cfa (NULL, STACK_POINTER_REGNUM, INCOMING_FRAME_SP_OFFSET); | |
658f32fd AO |
2664 | |
2665 | #ifdef DWARF2_UNWIND_INFO | |
2666 | if (DWARF2_UNWIND_INFO) | |
2667 | initial_return_save (INCOMING_RETURN_ADDR_RTX); | |
3f76745e JM |
2668 | #endif |
2669 | } | |
2670 | ||
2671 | void | |
7080f735 | 2672 | dwarf2out_frame_finish (void) |
3f76745e | 2673 | { |
3f76745e | 2674 | /* Output call frame information. */ |
658f32fd | 2675 | if (DWARF2_FRAME_INFO) |
3f76745e | 2676 | output_call_frame_info (0); |
2ad9852d | 2677 | |
5cf58f28 PB |
2678 | #ifndef TARGET_UNWIND_INFO |
2679 | /* Output another copy for the unwinder. */ | |
ddee9e8d | 2680 | if (! USING_SJLJ_EXCEPTIONS && (flag_unwind_tables || flag_exceptions)) |
3f76745e | 2681 | output_call_frame_info (1); |
5cf58f28 | 2682 | #endif |
556273e0 | 2683 | } |
17211ab5 | 2684 | #endif |
7d9d8943 AM |
2685 | \f |
2686 | /* And now, the subset of the debugging information support code necessary | |
2687 | for emitting location expressions. */ | |
3f76745e | 2688 | |
d5688810 GK |
2689 | /* Data about a single source file. */ |
2690 | struct dwarf_file_data GTY(()) | |
2691 | { | |
2692 | const char * filename; | |
2693 | int emitted_number; | |
2694 | }; | |
2695 | ||
b9203463 RH |
2696 | /* We need some way to distinguish DW_OP_addr with a direct symbol |
2697 | relocation from DW_OP_addr with a dtp-relative symbol relocation. */ | |
2698 | #define INTERNAL_DW_OP_tls_addr (0x100 + DW_OP_addr) | |
2699 | ||
2700 | ||
7d9d8943 AM |
2701 | typedef struct dw_val_struct *dw_val_ref; |
2702 | typedef struct die_struct *dw_die_ref; | |
5f754896 | 2703 | typedef const struct die_struct *const_dw_die_ref; |
7d9d8943 | 2704 | typedef struct dw_loc_descr_struct *dw_loc_descr_ref; |
63e46568 | 2705 | typedef struct dw_loc_list_struct *dw_loc_list_ref; |
3f76745e JM |
2706 | |
2707 | /* Each DIE may have a series of attribute/value pairs. Values | |
2708 | can take on several forms. The forms that are used in this | |
2709 | implementation are listed below. */ | |
2710 | ||
17211ab5 | 2711 | enum dw_val_class |
3f76745e JM |
2712 | { |
2713 | dw_val_class_addr, | |
a20612aa | 2714 | dw_val_class_offset, |
3f76745e | 2715 | dw_val_class_loc, |
63e46568 | 2716 | dw_val_class_loc_list, |
2bee6045 | 2717 | dw_val_class_range_list, |
3f76745e JM |
2718 | dw_val_class_const, |
2719 | dw_val_class_unsigned_const, | |
2720 | dw_val_class_long_long, | |
e7ee3914 | 2721 | dw_val_class_vec, |
3f76745e JM |
2722 | dw_val_class_flag, |
2723 | dw_val_class_die_ref, | |
2724 | dw_val_class_fde_ref, | |
2725 | dw_val_class_lbl_id, | |
192d0f89 GK |
2726 | dw_val_class_lineptr, |
2727 | dw_val_class_str, | |
d5688810 GK |
2728 | dw_val_class_macptr, |
2729 | dw_val_class_file | |
17211ab5 | 2730 | }; |
a3f97cbb | 2731 | |
3f76745e | 2732 | /* Describe a double word constant value. */ |
21217bd0 | 2733 | /* ??? Every instance of long_long in the code really means CONST_DOUBLE. */ |
3f76745e | 2734 | |
17211ab5 | 2735 | typedef struct dw_long_long_struct GTY(()) |
a3f97cbb | 2736 | { |
3f76745e JM |
2737 | unsigned long hi; |
2738 | unsigned long low; | |
2739 | } | |
2740 | dw_long_long_const; | |
2741 | ||
e7ee3914 | 2742 | /* Describe a floating point constant value, or a vector constant value. */ |
3f76745e | 2743 | |
e7ee3914 | 2744 | typedef struct dw_vec_struct GTY(()) |
3f76745e | 2745 | { |
e7ee3914 | 2746 | unsigned char * GTY((length ("%h.length"))) array; |
3f76745e | 2747 | unsigned length; |
e7ee3914 | 2748 | unsigned elt_size; |
3f76745e | 2749 | } |
e7ee3914 | 2750 | dw_vec_const; |
3f76745e | 2751 | |
956d6950 | 2752 | /* The dw_val_node describes an attribute's value, as it is |
3f76745e JM |
2753 | represented internally. */ |
2754 | ||
17211ab5 | 2755 | typedef struct dw_val_struct GTY(()) |
3f76745e | 2756 | { |
17211ab5 GK |
2757 | enum dw_val_class val_class; |
2758 | union dw_val_struct_union | |
a3f97cbb | 2759 | { |
17211ab5 | 2760 | rtx GTY ((tag ("dw_val_class_addr"))) val_addr; |
799f628a | 2761 | unsigned HOST_WIDE_INT GTY ((tag ("dw_val_class_offset"))) val_offset; |
17211ab5 GK |
2762 | dw_loc_list_ref GTY ((tag ("dw_val_class_loc_list"))) val_loc_list; |
2763 | dw_loc_descr_ref GTY ((tag ("dw_val_class_loc"))) val_loc; | |
1431042e | 2764 | HOST_WIDE_INT GTY ((default)) val_int; |
799f628a | 2765 | unsigned HOST_WIDE_INT GTY ((tag ("dw_val_class_unsigned_const"))) val_unsigned; |
17211ab5 | 2766 | dw_long_long_const GTY ((tag ("dw_val_class_long_long"))) val_long_long; |
e7ee3914 | 2767 | dw_vec_const GTY ((tag ("dw_val_class_vec"))) val_vec; |
17211ab5 | 2768 | struct dw_val_die_union |
2ad9852d RK |
2769 | { |
2770 | dw_die_ref die; | |
2771 | int external; | |
17211ab5 GK |
2772 | } GTY ((tag ("dw_val_class_die_ref"))) val_die_ref; |
2773 | unsigned GTY ((tag ("dw_val_class_fde_ref"))) val_fde_index; | |
2774 | struct indirect_string_node * GTY ((tag ("dw_val_class_str"))) val_str; | |
2775 | char * GTY ((tag ("dw_val_class_lbl_id"))) val_lbl_id; | |
2776 | unsigned char GTY ((tag ("dw_val_class_flag"))) val_flag; | |
d5688810 | 2777 | struct dwarf_file_data * GTY ((tag ("dw_val_class_file"))) val_file; |
a3f97cbb | 2778 | } |
17211ab5 | 2779 | GTY ((desc ("%1.val_class"))) v; |
3f76745e JM |
2780 | } |
2781 | dw_val_node; | |
2782 | ||
2783 | /* Locations in memory are described using a sequence of stack machine | |
2784 | operations. */ | |
2785 | ||
17211ab5 | 2786 | typedef struct dw_loc_descr_struct GTY(()) |
3f76745e JM |
2787 | { |
2788 | dw_loc_descr_ref dw_loc_next; | |
2789 | enum dwarf_location_atom dw_loc_opc; | |
2790 | dw_val_node dw_loc_oprnd1; | |
2791 | dw_val_node dw_loc_oprnd2; | |
d8041cc8 | 2792 | int dw_loc_addr; |
3f76745e JM |
2793 | } |
2794 | dw_loc_descr_node; | |
2795 | ||
63e46568 DB |
2796 | /* Location lists are ranges + location descriptions for that range, |
2797 | so you can track variables that are in different places over | |
30f7a378 | 2798 | their entire life. */ |
17211ab5 | 2799 | typedef struct dw_loc_list_struct GTY(()) |
63e46568 DB |
2800 | { |
2801 | dw_loc_list_ref dw_loc_next; | |
2802 | const char *begin; /* Label for begin address of range */ | |
2803 | const char *end; /* Label for end address of range */ | |
2ad9852d RK |
2804 | char *ll_symbol; /* Label for beginning of location list. |
2805 | Only on head of list */ | |
63e46568 DB |
2806 | const char *section; /* Section this loclist is relative to */ |
2807 | dw_loc_descr_ref expr; | |
2808 | } dw_loc_list_node; | |
2809 | ||
17211ab5 GK |
2810 | #if defined (DWARF2_DEBUGGING_INFO) || defined (DWARF2_UNWIND_INFO) |
2811 | ||
7080f735 AJ |
2812 | static const char *dwarf_stack_op_name (unsigned); |
2813 | static dw_loc_descr_ref new_loc_descr (enum dwarf_location_atom, | |
799f628a | 2814 | unsigned HOST_WIDE_INT, unsigned HOST_WIDE_INT); |
7080f735 AJ |
2815 | static void add_loc_descr (dw_loc_descr_ref *, dw_loc_descr_ref); |
2816 | static unsigned long size_of_loc_descr (dw_loc_descr_ref); | |
2817 | static unsigned long size_of_locs (dw_loc_descr_ref); | |
2818 | static void output_loc_operands (dw_loc_descr_ref); | |
2819 | static void output_loc_sequence (dw_loc_descr_ref); | |
3f76745e | 2820 | |
7d9d8943 | 2821 | /* Convert a DWARF stack opcode into its string name. */ |
3f76745e | 2822 | |
7d9d8943 | 2823 | static const char * |
7080f735 | 2824 | dwarf_stack_op_name (unsigned int op) |
ef76d03b | 2825 | { |
7d9d8943 AM |
2826 | switch (op) |
2827 | { | |
2828 | case DW_OP_addr: | |
b9203463 | 2829 | case INTERNAL_DW_OP_tls_addr: |
7d9d8943 AM |
2830 | return "DW_OP_addr"; |
2831 | case DW_OP_deref: | |
2832 | return "DW_OP_deref"; | |
2833 | case DW_OP_const1u: | |
2834 | return "DW_OP_const1u"; | |
2835 | case DW_OP_const1s: | |
2836 | return "DW_OP_const1s"; | |
2837 | case DW_OP_const2u: | |
2838 | return "DW_OP_const2u"; | |
2839 | case DW_OP_const2s: | |
2840 | return "DW_OP_const2s"; | |
2841 | case DW_OP_const4u: | |
2842 | return "DW_OP_const4u"; | |
2843 | case DW_OP_const4s: | |
2844 | return "DW_OP_const4s"; | |
2845 | case DW_OP_const8u: | |
2846 | return "DW_OP_const8u"; | |
2847 | case DW_OP_const8s: | |
2848 | return "DW_OP_const8s"; | |
2849 | case DW_OP_constu: | |
2850 | return "DW_OP_constu"; | |
2851 | case DW_OP_consts: | |
2852 | return "DW_OP_consts"; | |
2853 | case DW_OP_dup: | |
2854 | return "DW_OP_dup"; | |
2855 | case DW_OP_drop: | |
2856 | return "DW_OP_drop"; | |
2857 | case DW_OP_over: | |
2858 | return "DW_OP_over"; | |
2859 | case DW_OP_pick: | |
2860 | return "DW_OP_pick"; | |
2861 | case DW_OP_swap: | |
2862 | return "DW_OP_swap"; | |
2863 | case DW_OP_rot: | |
2864 | return "DW_OP_rot"; | |
2865 | case DW_OP_xderef: | |
2866 | return "DW_OP_xderef"; | |
2867 | case DW_OP_abs: | |
2868 | return "DW_OP_abs"; | |
2869 | case DW_OP_and: | |
2870 | return "DW_OP_and"; | |
2871 | case DW_OP_div: | |
2872 | return "DW_OP_div"; | |
2873 | case DW_OP_minus: | |
2874 | return "DW_OP_minus"; | |
2875 | case DW_OP_mod: | |
2876 | return "DW_OP_mod"; | |
2877 | case DW_OP_mul: | |
2878 | return "DW_OP_mul"; | |
2879 | case DW_OP_neg: | |
2880 | return "DW_OP_neg"; | |
2881 | case DW_OP_not: | |
2882 | return "DW_OP_not"; | |
2883 | case DW_OP_or: | |
2884 | return "DW_OP_or"; | |
2885 | case DW_OP_plus: | |
2886 | return "DW_OP_plus"; | |
2887 | case DW_OP_plus_uconst: | |
2888 | return "DW_OP_plus_uconst"; | |
2889 | case DW_OP_shl: | |
2890 | return "DW_OP_shl"; | |
2891 | case DW_OP_shr: | |
2892 | return "DW_OP_shr"; | |
2893 | case DW_OP_shra: | |
2894 | return "DW_OP_shra"; | |
2895 | case DW_OP_xor: | |
2896 | return "DW_OP_xor"; | |
2897 | case DW_OP_bra: | |
2898 | return "DW_OP_bra"; | |
2899 | case DW_OP_eq: | |
2900 | return "DW_OP_eq"; | |
2901 | case DW_OP_ge: | |
2902 | return "DW_OP_ge"; | |
2903 | case DW_OP_gt: | |
2904 | return "DW_OP_gt"; | |
2905 | case DW_OP_le: | |
2906 | return "DW_OP_le"; | |
2907 | case DW_OP_lt: | |
2908 | return "DW_OP_lt"; | |
2909 | case DW_OP_ne: | |
2910 | return "DW_OP_ne"; | |
2911 | case DW_OP_skip: | |
2912 | return "DW_OP_skip"; | |
2913 | case DW_OP_lit0: | |
2914 | return "DW_OP_lit0"; | |
2915 | case DW_OP_lit1: | |
2916 | return "DW_OP_lit1"; | |
2917 | case DW_OP_lit2: | |
2918 | return "DW_OP_lit2"; | |
2919 | case DW_OP_lit3: | |
2920 | return "DW_OP_lit3"; | |
2921 | case DW_OP_lit4: | |
2922 | return "DW_OP_lit4"; | |
2923 | case DW_OP_lit5: | |
2924 | return "DW_OP_lit5"; | |
2925 | case DW_OP_lit6: | |
2926 | return "DW_OP_lit6"; | |
2927 | case DW_OP_lit7: | |
2928 | return "DW_OP_lit7"; | |
2929 | case DW_OP_lit8: | |
2930 | return "DW_OP_lit8"; | |
2931 | case DW_OP_lit9: | |
2932 | return "DW_OP_lit9"; | |
2933 | case DW_OP_lit10: | |
2934 | return "DW_OP_lit10"; | |
2935 | case DW_OP_lit11: | |
2936 | return "DW_OP_lit11"; | |
2937 | case DW_OP_lit12: | |
2938 | return "DW_OP_lit12"; | |
2939 | case DW_OP_lit13: | |
2940 | return "DW_OP_lit13"; | |
2941 | case DW_OP_lit14: | |
2942 | return "DW_OP_lit14"; | |
2943 | case DW_OP_lit15: | |
2944 | return "DW_OP_lit15"; | |
2945 | case DW_OP_lit16: | |
2946 | return "DW_OP_lit16"; | |
2947 | case DW_OP_lit17: | |
2948 | return "DW_OP_lit17"; | |
2949 | case DW_OP_lit18: | |
2950 | return "DW_OP_lit18"; | |
2951 | case DW_OP_lit19: | |
2952 | return "DW_OP_lit19"; | |
2953 | case DW_OP_lit20: | |
2954 | return "DW_OP_lit20"; | |
2955 | case DW_OP_lit21: | |
2956 | return "DW_OP_lit21"; | |
2957 | case DW_OP_lit22: | |
2958 | return "DW_OP_lit22"; | |
2959 | case DW_OP_lit23: | |
2960 | return "DW_OP_lit23"; | |
2961 | case DW_OP_lit24: | |
2962 | return "DW_OP_lit24"; | |
2963 | case DW_OP_lit25: | |
2964 | return "DW_OP_lit25"; | |
2965 | case DW_OP_lit26: | |
2966 | return "DW_OP_lit26"; | |
2967 | case DW_OP_lit27: | |
2968 | return "DW_OP_lit27"; | |
2969 | case DW_OP_lit28: | |
2970 | return "DW_OP_lit28"; | |
2971 | case DW_OP_lit29: | |
2972 | return "DW_OP_lit29"; | |
2973 | case DW_OP_lit30: | |
2974 | return "DW_OP_lit30"; | |
2975 | case DW_OP_lit31: | |
2976 | return "DW_OP_lit31"; | |
2977 | case DW_OP_reg0: | |
2978 | return "DW_OP_reg0"; | |
2979 | case DW_OP_reg1: | |
2980 | return "DW_OP_reg1"; | |
2981 | case DW_OP_reg2: | |
2982 | return "DW_OP_reg2"; | |
2983 | case DW_OP_reg3: | |
2984 | return "DW_OP_reg3"; | |
2985 | case DW_OP_reg4: | |
2986 | return "DW_OP_reg4"; | |
2987 | case DW_OP_reg5: | |
2988 | return "DW_OP_reg5"; | |
2989 | case DW_OP_reg6: | |
2990 | return "DW_OP_reg6"; | |
2991 | case DW_OP_reg7: | |
2992 | return "DW_OP_reg7"; | |
2993 | case DW_OP_reg8: | |
2994 | return "DW_OP_reg8"; | |
2995 | case DW_OP_reg9: | |
2996 | return "DW_OP_reg9"; | |
2997 | case DW_OP_reg10: | |
2998 | return "DW_OP_reg10"; | |
2999 | case DW_OP_reg11: | |
3000 | return "DW_OP_reg11"; | |
3001 | case DW_OP_reg12: | |
3002 | return "DW_OP_reg12"; | |
3003 | case DW_OP_reg13: | |
3004 | return "DW_OP_reg13"; | |
3005 | case DW_OP_reg14: | |
3006 | return "DW_OP_reg14"; | |
3007 | case DW_OP_reg15: | |
3008 | return "DW_OP_reg15"; | |
3009 | case DW_OP_reg16: | |
3010 | return "DW_OP_reg16"; | |
3011 | case DW_OP_reg17: | |
3012 | return "DW_OP_reg17"; | |
3013 | case DW_OP_reg18: | |
3014 | return "DW_OP_reg18"; | |
3015 | case DW_OP_reg19: | |
3016 | return "DW_OP_reg19"; | |
3017 | case DW_OP_reg20: | |
3018 | return "DW_OP_reg20"; | |
3019 | case DW_OP_reg21: | |
3020 | return "DW_OP_reg21"; | |
3021 | case DW_OP_reg22: | |
3022 | return "DW_OP_reg22"; | |
3023 | case DW_OP_reg23: | |
3024 | return "DW_OP_reg23"; | |
3025 | case DW_OP_reg24: | |
3026 | return "DW_OP_reg24"; | |
3027 | case DW_OP_reg25: | |
3028 | return "DW_OP_reg25"; | |
3029 | case DW_OP_reg26: | |
3030 | return "DW_OP_reg26"; | |
3031 | case DW_OP_reg27: | |
3032 | return "DW_OP_reg27"; | |
3033 | case DW_OP_reg28: | |
3034 | return "DW_OP_reg28"; | |
3035 | case DW_OP_reg29: | |
3036 | return "DW_OP_reg29"; | |
3037 | case DW_OP_reg30: | |
3038 | return "DW_OP_reg30"; | |
3039 | case DW_OP_reg31: | |
3040 | return "DW_OP_reg31"; | |
3041 | case DW_OP_breg0: | |
3042 | return "DW_OP_breg0"; | |
3043 | case DW_OP_breg1: | |
3044 | return "DW_OP_breg1"; | |
3045 | case DW_OP_breg2: | |
3046 | return "DW_OP_breg2"; | |
3047 | case DW_OP_breg3: | |
3048 | return "DW_OP_breg3"; | |
3049 | case DW_OP_breg4: | |
3050 | return "DW_OP_breg4"; | |
3051 | case DW_OP_breg5: | |
3052 | return "DW_OP_breg5"; | |
3053 | case DW_OP_breg6: | |
3054 | return "DW_OP_breg6"; | |
3055 | case DW_OP_breg7: | |
3056 | return "DW_OP_breg7"; | |
3057 | case DW_OP_breg8: | |
3058 | return "DW_OP_breg8"; | |
3059 | case DW_OP_breg9: | |
3060 | return "DW_OP_breg9"; | |
3061 | case DW_OP_breg10: | |
3062 | return "DW_OP_breg10"; | |
3063 | case DW_OP_breg11: | |
3064 | return "DW_OP_breg11"; | |
3065 | case DW_OP_breg12: | |
3066 | return "DW_OP_breg12"; | |
3067 | case DW_OP_breg13: | |
3068 | return "DW_OP_breg13"; | |
3069 | case DW_OP_breg14: | |
3070 | return "DW_OP_breg14"; | |
3071 | case DW_OP_breg15: | |
3072 | return "DW_OP_breg15"; | |
3073 | case DW_OP_breg16: | |
3074 | return "DW_OP_breg16"; | |
3075 | case DW_OP_breg17: | |
3076 | return "DW_OP_breg17"; | |
3077 | case DW_OP_breg18: | |
3078 | return "DW_OP_breg18"; | |
3079 | case DW_OP_breg19: | |
3080 | return "DW_OP_breg19"; | |
3081 | case DW_OP_breg20: | |
3082 | return "DW_OP_breg20"; | |
3083 | case DW_OP_breg21: | |
3084 | return "DW_OP_breg21"; | |
3085 | case DW_OP_breg22: | |
3086 | return "DW_OP_breg22"; | |
3087 | case DW_OP_breg23: | |
3088 | return "DW_OP_breg23"; | |
3089 | case DW_OP_breg24: | |
3090 | return "DW_OP_breg24"; | |
3091 | case DW_OP_breg25: | |
3092 | return "DW_OP_breg25"; | |
3093 | case DW_OP_breg26: | |
3094 | return "DW_OP_breg26"; | |
3095 | case DW_OP_breg27: | |
3096 | return "DW_OP_breg27"; | |
3097 | case DW_OP_breg28: | |
3098 | return "DW_OP_breg28"; | |
3099 | case DW_OP_breg29: | |
3100 | return "DW_OP_breg29"; | |
3101 | case DW_OP_breg30: | |
3102 | return "DW_OP_breg30"; | |
3103 | case DW_OP_breg31: | |
3104 | return "DW_OP_breg31"; | |
3105 | case DW_OP_regx: | |
3106 | return "DW_OP_regx"; | |
3107 | case DW_OP_fbreg: | |
3108 | return "DW_OP_fbreg"; | |
3109 | case DW_OP_bregx: | |
3110 | return "DW_OP_bregx"; | |
3111 | case DW_OP_piece: | |
3112 | return "DW_OP_piece"; | |
3113 | case DW_OP_deref_size: | |
3114 | return "DW_OP_deref_size"; | |
3115 | case DW_OP_xderef_size: | |
3116 | return "DW_OP_xderef_size"; | |
3117 | case DW_OP_nop: | |
3118 | return "DW_OP_nop"; | |
b9203463 RH |
3119 | case DW_OP_push_object_address: |
3120 | return "DW_OP_push_object_address"; | |
3121 | case DW_OP_call2: | |
3122 | return "DW_OP_call2"; | |
3123 | case DW_OP_call4: | |
3124 | return "DW_OP_call4"; | |
3125 | case DW_OP_call_ref: | |
3126 | return "DW_OP_call_ref"; | |
3127 | case DW_OP_GNU_push_tls_address: | |
3128 | return "DW_OP_GNU_push_tls_address"; | |
62760ffd CT |
3129 | case DW_OP_GNU_uninit: |
3130 | return "DW_OP_GNU_uninit"; | |
3f76745e | 3131 | default: |
7d9d8943 | 3132 | return "OP_<unknown>"; |
3f76745e | 3133 | } |
bdb669cb | 3134 | } |
a3f97cbb | 3135 | |
7d9d8943 AM |
3136 | /* Return a pointer to a newly allocated location description. Location |
3137 | descriptions are simple expression terms that can be strung | |
3138 | together to form more complicated location (address) descriptions. */ | |
3139 | ||
3140 | static inline dw_loc_descr_ref | |
799f628a JH |
3141 | new_loc_descr (enum dwarf_location_atom op, unsigned HOST_WIDE_INT oprnd1, |
3142 | unsigned HOST_WIDE_INT oprnd2) | |
4b674448 | 3143 | { |
703ad42b | 3144 | dw_loc_descr_ref descr = ggc_alloc_cleared (sizeof (dw_loc_descr_node)); |
71dfc51f | 3145 | |
7d9d8943 AM |
3146 | descr->dw_loc_opc = op; |
3147 | descr->dw_loc_oprnd1.val_class = dw_val_class_unsigned_const; | |
3148 | descr->dw_loc_oprnd1.v.val_unsigned = oprnd1; | |
3149 | descr->dw_loc_oprnd2.val_class = dw_val_class_unsigned_const; | |
3150 | descr->dw_loc_oprnd2.v.val_unsigned = oprnd2; | |
71dfc51f | 3151 | |
7d9d8943 AM |
3152 | return descr; |
3153 | } | |
3154 | ||
3155 | /* Add a location description term to a location description expression. */ | |
3156 | ||
3157 | static inline void | |
7080f735 | 3158 | add_loc_descr (dw_loc_descr_ref *list_head, dw_loc_descr_ref descr) |
7d9d8943 | 3159 | { |
b3694847 | 3160 | dw_loc_descr_ref *d; |
7d9d8943 AM |
3161 | |
3162 | /* Find the end of the chain. */ | |
3163 | for (d = list_head; (*d) != NULL; d = &(*d)->dw_loc_next) | |
3164 | ; | |
3165 | ||
3166 | *d = descr; | |
3167 | } | |
3168 | ||
3169 | /* Return the size of a location descriptor. */ | |
3170 | ||
3171 | static unsigned long | |
7080f735 | 3172 | size_of_loc_descr (dw_loc_descr_ref loc) |
7d9d8943 | 3173 | { |
b3694847 | 3174 | unsigned long size = 1; |
7d9d8943 AM |
3175 | |
3176 | switch (loc->dw_loc_opc) | |
3177 | { | |
3178 | case DW_OP_addr: | |
b9203463 | 3179 | case INTERNAL_DW_OP_tls_addr: |
7d9d8943 AM |
3180 | size += DWARF2_ADDR_SIZE; |
3181 | break; | |
3182 | case DW_OP_const1u: | |
3183 | case DW_OP_const1s: | |
3184 | size += 1; | |
3185 | break; | |
3186 | case DW_OP_const2u: | |
3187 | case DW_OP_const2s: | |
3188 | size += 2; | |
3189 | break; | |
3190 | case DW_OP_const4u: | |
3191 | case DW_OP_const4s: | |
3192 | size += 4; | |
3193 | break; | |
3194 | case DW_OP_const8u: | |
3195 | case DW_OP_const8s: | |
3196 | size += 8; | |
3197 | break; | |
3198 | case DW_OP_constu: | |
3199 | size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned); | |
3200 | break; | |
3201 | case DW_OP_consts: | |
3202 | size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int); | |
3203 | break; | |
3204 | case DW_OP_pick: | |
3205 | size += 1; | |
3206 | break; | |
3207 | case DW_OP_plus_uconst: | |
3208 | size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned); | |
3209 | break; | |
3210 | case DW_OP_skip: | |
3211 | case DW_OP_bra: | |
3212 | size += 2; | |
3213 | break; | |
3214 | case DW_OP_breg0: | |
3215 | case DW_OP_breg1: | |
3216 | case DW_OP_breg2: | |
3217 | case DW_OP_breg3: | |
3218 | case DW_OP_breg4: | |
3219 | case DW_OP_breg5: | |
3220 | case DW_OP_breg6: | |
3221 | case DW_OP_breg7: | |
3222 | case DW_OP_breg8: | |
3223 | case DW_OP_breg9: | |
3224 | case DW_OP_breg10: | |
3225 | case DW_OP_breg11: | |
3226 | case DW_OP_breg12: | |
3227 | case DW_OP_breg13: | |
3228 | case DW_OP_breg14: | |
3229 | case DW_OP_breg15: | |
3230 | case DW_OP_breg16: | |
3231 | case DW_OP_breg17: | |
3232 | case DW_OP_breg18: | |
3233 | case DW_OP_breg19: | |
3234 | case DW_OP_breg20: | |
3235 | case DW_OP_breg21: | |
3236 | case DW_OP_breg22: | |
3237 | case DW_OP_breg23: | |
3238 | case DW_OP_breg24: | |
3239 | case DW_OP_breg25: | |
3240 | case DW_OP_breg26: | |
3241 | case DW_OP_breg27: | |
3242 | case DW_OP_breg28: | |
3243 | case DW_OP_breg29: | |
3244 | case DW_OP_breg30: | |
3245 | case DW_OP_breg31: | |
3246 | size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int); | |
3247 | break; | |
3248 | case DW_OP_regx: | |
3249 | size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned); | |
3250 | break; | |
3251 | case DW_OP_fbreg: | |
3252 | size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int); | |
3253 | break; | |
3254 | case DW_OP_bregx: | |
3255 | size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned); | |
3256 | size += size_of_sleb128 (loc->dw_loc_oprnd2.v.val_int); | |
3257 | break; | |
3258 | case DW_OP_piece: | |
3259 | size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned); | |
3260 | break; | |
3261 | case DW_OP_deref_size: | |
3262 | case DW_OP_xderef_size: | |
3263 | size += 1; | |
3264 | break; | |
b9203463 RH |
3265 | case DW_OP_call2: |
3266 | size += 2; | |
3267 | break; | |
3268 | case DW_OP_call4: | |
3269 | size += 4; | |
3270 | break; | |
3271 | case DW_OP_call_ref: | |
3272 | size += DWARF2_ADDR_SIZE; | |
3273 | break; | |
3f76745e | 3274 | default: |
7d9d8943 | 3275 | break; |
4b674448 | 3276 | } |
7d9d8943 AM |
3277 | |
3278 | return size; | |
4b674448 JM |
3279 | } |
3280 | ||
7d9d8943 | 3281 | /* Return the size of a series of location descriptors. */ |
71dfc51f | 3282 | |
7d9d8943 | 3283 | static unsigned long |
7080f735 | 3284 | size_of_locs (dw_loc_descr_ref loc) |
4b674448 | 3285 | { |
887dc802 | 3286 | dw_loc_descr_ref l; |
2ad9852d | 3287 | unsigned long size; |
7d9d8943 | 3288 | |
887dc802 GK |
3289 | /* If there are no skip or bra opcodes, don't fill in the dw_loc_addr |
3290 | field, to avoid writing to a PCH file. */ | |
3291 | for (size = 0, l = loc; l != NULL; l = l->dw_loc_next) | |
d8041cc8 | 3292 | { |
887dc802 GK |
3293 | if (l->dw_loc_opc == DW_OP_skip || l->dw_loc_opc == DW_OP_bra) |
3294 | break; | |
3295 | size += size_of_loc_descr (l); | |
3296 | } | |
3297 | if (! l) | |
3298 | return size; | |
3299 | ||
3300 | for (size = 0, l = loc; l != NULL; l = l->dw_loc_next) | |
3301 | { | |
3302 | l->dw_loc_addr = size; | |
3303 | size += size_of_loc_descr (l); | |
d8041cc8 | 3304 | } |
7d9d8943 AM |
3305 | |
3306 | return size; | |
4b674448 JM |
3307 | } |
3308 | ||
7d9d8943 | 3309 | /* Output location description stack opcode's operands (if any). */ |
71dfc51f | 3310 | |
7d9d8943 | 3311 | static void |
7080f735 | 3312 | output_loc_operands (dw_loc_descr_ref loc) |
a3f97cbb | 3313 | { |
b3694847 SS |
3314 | dw_val_ref val1 = &loc->dw_loc_oprnd1; |
3315 | dw_val_ref val2 = &loc->dw_loc_oprnd2; | |
7d9d8943 AM |
3316 | |
3317 | switch (loc->dw_loc_opc) | |
a3f97cbb | 3318 | { |
0517872a | 3319 | #ifdef DWARF2_DEBUGGING_INFO |
3f76745e | 3320 | case DW_OP_addr: |
2e4b9b8c | 3321 | dw2_asm_output_addr_rtx (DWARF2_ADDR_SIZE, val1->v.val_addr, NULL); |
7d9d8943 | 3322 | break; |
3f76745e | 3323 | case DW_OP_const2u: |
3f76745e | 3324 | case DW_OP_const2s: |
2e4b9b8c | 3325 | dw2_asm_output_data (2, val1->v.val_int, NULL); |
7d9d8943 | 3326 | break; |
3f76745e | 3327 | case DW_OP_const4u: |
3f76745e | 3328 | case DW_OP_const4s: |
2e4b9b8c | 3329 | dw2_asm_output_data (4, val1->v.val_int, NULL); |
7d9d8943 | 3330 | break; |
3f76745e | 3331 | case DW_OP_const8u: |
3f76745e | 3332 | case DW_OP_const8s: |
ced3f397 | 3333 | gcc_assert (HOST_BITS_PER_LONG >= 64); |
2e4b9b8c | 3334 | dw2_asm_output_data (8, val1->v.val_int, NULL); |
7d9d8943 | 3335 | break; |
0517872a JM |
3336 | case DW_OP_skip: |
3337 | case DW_OP_bra: | |
d8041cc8 RH |
3338 | { |
3339 | int offset; | |
3340 | ||
ced3f397 NS |
3341 | gcc_assert (val1->val_class == dw_val_class_loc); |
3342 | offset = val1->v.val_loc->dw_loc_addr - (loc->dw_loc_addr + 3); | |
d8041cc8 | 3343 | |
2e4b9b8c | 3344 | dw2_asm_output_data (2, offset, NULL); |
d8041cc8 | 3345 | } |
0517872a | 3346 | break; |
3139472f JM |
3347 | #else |
3348 | case DW_OP_addr: | |
3349 | case DW_OP_const2u: | |
3350 | case DW_OP_const2s: | |
3351 | case DW_OP_const4u: | |
3352 | case DW_OP_const4s: | |
3353 | case DW_OP_const8u: | |
3354 | case DW_OP_const8s: | |
3355 | case DW_OP_skip: | |
3356 | case DW_OP_bra: | |
3357 | /* We currently don't make any attempt to make sure these are | |
73c68f61 SS |
3358 | aligned properly like we do for the main unwind info, so |
3359 | don't support emitting things larger than a byte if we're | |
3360 | only doing unwinding. */ | |
ced3f397 | 3361 | gcc_unreachable (); |
0517872a JM |
3362 | #endif |
3363 | case DW_OP_const1u: | |
3364 | case DW_OP_const1s: | |
2e4b9b8c | 3365 | dw2_asm_output_data (1, val1->v.val_int, NULL); |
0517872a | 3366 | break; |
3f76745e | 3367 | case DW_OP_constu: |
2e4b9b8c | 3368 | dw2_asm_output_data_uleb128 (val1->v.val_unsigned, NULL); |
7d9d8943 | 3369 | break; |
3f76745e | 3370 | case DW_OP_consts: |
2e4b9b8c | 3371 | dw2_asm_output_data_sleb128 (val1->v.val_int, NULL); |
7d9d8943 AM |
3372 | break; |
3373 | case DW_OP_pick: | |
2e4b9b8c | 3374 | dw2_asm_output_data (1, val1->v.val_int, NULL); |
7d9d8943 AM |
3375 | break; |
3376 | case DW_OP_plus_uconst: | |
2e4b9b8c | 3377 | dw2_asm_output_data_uleb128 (val1->v.val_unsigned, NULL); |
7d9d8943 | 3378 | break; |
3f76745e | 3379 | case DW_OP_breg0: |
3f76745e | 3380 | case DW_OP_breg1: |
3f76745e | 3381 | case DW_OP_breg2: |
3f76745e | 3382 | case DW_OP_breg3: |
3f76745e | 3383 | case DW_OP_breg4: |
3f76745e | 3384 | case DW_OP_breg5: |
3f76745e | 3385 | case DW_OP_breg6: |
3f76745e | 3386 | case DW_OP_breg7: |
3f76745e | 3387 | case DW_OP_breg8: |
3f76745e | 3388 | case DW_OP_breg9: |
3f76745e | 3389 | case DW_OP_breg10: |
3f76745e | 3390 | case DW_OP_breg11: |
3f76745e | 3391 | case DW_OP_breg12: |
3f76745e | 3392 | case DW_OP_breg13: |
3f76745e | 3393 | case DW_OP_breg14: |
3f76745e | 3394 | case DW_OP_breg15: |
3f76745e | 3395 | case DW_OP_breg16: |
3f76745e | 3396 | case DW_OP_breg17: |
3f76745e | 3397 | case DW_OP_breg18: |
3f76745e | 3398 | case DW_OP_breg19: |
3f76745e | 3399 | case DW_OP_breg20: |
3f76745e | 3400 | case DW_OP_breg21: |
3f76745e | 3401 | case DW_OP_breg22: |
3f76745e | 3402 | case DW_OP_breg23: |
3f76745e | 3403 | case DW_OP_breg24: |
3f76745e | 3404 | case DW_OP_breg25: |
3f76745e | 3405 | case DW_OP_breg26: |
3f76745e | 3406 | case DW_OP_breg27: |
3f76745e | 3407 | case DW_OP_breg28: |
3f76745e | 3408 | case DW_OP_breg29: |
3f76745e | 3409 | case DW_OP_breg30: |
3f76745e | 3410 | case DW_OP_breg31: |
2e4b9b8c | 3411 | dw2_asm_output_data_sleb128 (val1->v.val_int, NULL); |
7d9d8943 | 3412 | break; |
3f76745e | 3413 | case DW_OP_regx: |
2e4b9b8c | 3414 | dw2_asm_output_data_uleb128 (val1->v.val_unsigned, NULL); |
7d9d8943 | 3415 | break; |
3f76745e | 3416 | case DW_OP_fbreg: |
2e4b9b8c | 3417 | dw2_asm_output_data_sleb128 (val1->v.val_int, NULL); |
7d9d8943 | 3418 | break; |
3f76745e | 3419 | case DW_OP_bregx: |
2e4b9b8c RH |
3420 | dw2_asm_output_data_uleb128 (val1->v.val_unsigned, NULL); |
3421 | dw2_asm_output_data_sleb128 (val2->v.val_int, NULL); | |
7d9d8943 | 3422 | break; |
3f76745e | 3423 | case DW_OP_piece: |
2e4b9b8c | 3424 | dw2_asm_output_data_uleb128 (val1->v.val_unsigned, NULL); |
7d9d8943 | 3425 | break; |
3f76745e | 3426 | case DW_OP_deref_size: |
3f76745e | 3427 | case DW_OP_xderef_size: |
2e4b9b8c | 3428 | dw2_asm_output_data (1, val1->v.val_int, NULL); |
7d9d8943 | 3429 | break; |
b9203463 RH |
3430 | |
3431 | case INTERNAL_DW_OP_tls_addr: | |
fdbe66f2 EB |
3432 | if (targetm.asm_out.output_dwarf_dtprel) |
3433 | { | |
3434 | targetm.asm_out.output_dwarf_dtprel (asm_out_file, | |
3435 | DWARF2_ADDR_SIZE, | |
3436 | val1->v.val_addr); | |
3437 | fputc ('\n', asm_out_file); | |
3438 | } | |
3439 | else | |
3440 | gcc_unreachable (); | |
b9203463 RH |
3441 | break; |
3442 | ||
7d9d8943 | 3443 | default: |
3139472f JM |
3444 | /* Other codes have no operands. */ |
3445 | break; | |
7d9d8943 AM |
3446 | } |
3447 | } | |
3448 | ||
3449 | /* Output a sequence of location operations. */ | |
3450 | ||
3451 | static void | |
7080f735 | 3452 | output_loc_sequence (dw_loc_descr_ref loc) |
7d9d8943 AM |
3453 | { |
3454 | for (; loc != NULL; loc = loc->dw_loc_next) | |
3455 | { | |
3456 | /* Output the opcode. */ | |
2e4b9b8c RH |
3457 | dw2_asm_output_data (1, loc->dw_loc_opc, |
3458 | "%s", dwarf_stack_op_name (loc->dw_loc_opc)); | |
7d9d8943 AM |
3459 | |
3460 | /* Output the operand(s) (if any). */ | |
3461 | output_loc_operands (loc); | |
3462 | } | |
3463 | } | |
3464 | ||
3465 | /* This routine will generate the correct assembly data for a location | |
3466 | description based on a cfi entry with a complex address. */ | |
3467 | ||
3468 | static void | |
7080f735 | 3469 | output_cfa_loc (dw_cfi_ref cfi) |
7d9d8943 AM |
3470 | { |
3471 | dw_loc_descr_ref loc; | |
3472 | unsigned long size; | |
3473 | ||
3474 | /* Output the size of the block. */ | |
3475 | loc = cfi->dw_cfi_oprnd1.dw_cfi_loc; | |
3476 | size = size_of_locs (loc); | |
2e4b9b8c | 3477 | dw2_asm_output_data_uleb128 (size, NULL); |
7d9d8943 AM |
3478 | |
3479 | /* Now output the operations themselves. */ | |
3480 | output_loc_sequence (loc); | |
3481 | } | |
3482 | ||
35d177a2 AO |
3483 | /* This function builds a dwarf location descriptor sequence from a |
3484 | dw_cfa_location, adding the given OFFSET to the result of the | |
3485 | expression. */ | |
7d9d8943 AM |
3486 | |
3487 | static struct dw_loc_descr_struct * | |
35d177a2 | 3488 | build_cfa_loc (dw_cfa_location *cfa, HOST_WIDE_INT offset) |
7d9d8943 AM |
3489 | { |
3490 | struct dw_loc_descr_struct *head, *tmp; | |
3491 | ||
35d177a2 AO |
3492 | offset += cfa->offset; |
3493 | ||
30e6f306 | 3494 | if (cfa->indirect) |
f299afab | 3495 | { |
30e6f306 RH |
3496 | if (cfa->base_offset) |
3497 | { | |
3498 | if (cfa->reg <= 31) | |
3499 | head = new_loc_descr (DW_OP_breg0 + cfa->reg, cfa->base_offset, 0); | |
3500 | else | |
3501 | head = new_loc_descr (DW_OP_bregx, cfa->reg, cfa->base_offset); | |
3502 | } | |
3503 | else if (cfa->reg <= 31) | |
3504 | head = new_loc_descr (DW_OP_reg0 + cfa->reg, 0, 0); | |
f299afab | 3505 | else |
30e6f306 RH |
3506 | head = new_loc_descr (DW_OP_regx, cfa->reg, 0); |
3507 | ||
3508 | head->dw_loc_oprnd1.val_class = dw_val_class_const; | |
3509 | tmp = new_loc_descr (DW_OP_deref, 0, 0); | |
3510 | add_loc_descr (&head, tmp); | |
35d177a2 | 3511 | if (offset != 0) |
30e6f306 | 3512 | { |
35d177a2 | 3513 | tmp = new_loc_descr (DW_OP_plus_uconst, offset, 0); |
30e6f306 RH |
3514 | add_loc_descr (&head, tmp); |
3515 | } | |
f299afab | 3516 | } |
f299afab | 3517 | else |
7d9d8943 | 3518 | { |
35d177a2 | 3519 | if (offset == 0) |
30e6f306 RH |
3520 | if (cfa->reg <= 31) |
3521 | head = new_loc_descr (DW_OP_reg0 + cfa->reg, 0, 0); | |
3522 | else | |
3523 | head = new_loc_descr (DW_OP_regx, cfa->reg, 0); | |
3524 | else if (cfa->reg <= 31) | |
35d177a2 | 3525 | head = new_loc_descr (DW_OP_breg0 + cfa->reg, offset, 0); |
30e6f306 | 3526 | else |
35d177a2 | 3527 | head = new_loc_descr (DW_OP_bregx, cfa->reg, offset); |
7d9d8943 | 3528 | } |
2ad9852d | 3529 | |
7d9d8943 AM |
3530 | return head; |
3531 | } | |
3532 | ||
2ad9852d RK |
3533 | /* This function fills in aa dw_cfa_location structure from a dwarf location |
3534 | descriptor sequence. */ | |
7d9d8943 AM |
3535 | |
3536 | static void | |
7080f735 | 3537 | get_cfa_from_loc_descr (dw_cfa_location *cfa, struct dw_loc_descr_struct *loc) |
7d9d8943 | 3538 | { |
556273e0 | 3539 | struct dw_loc_descr_struct *ptr; |
7d9d8943 AM |
3540 | cfa->offset = 0; |
3541 | cfa->base_offset = 0; | |
3542 | cfa->indirect = 0; | |
3543 | cfa->reg = -1; | |
3544 | ||
3545 | for (ptr = loc; ptr != NULL; ptr = ptr->dw_loc_next) | |
3546 | { | |
3547 | enum dwarf_location_atom op = ptr->dw_loc_opc; | |
2ad9852d | 3548 | |
7d9d8943 | 3549 | switch (op) |
556273e0 | 3550 | { |
7d9d8943 AM |
3551 | case DW_OP_reg0: |
3552 | case DW_OP_reg1: | |
3553 | case DW_OP_reg2: | |
3554 | case DW_OP_reg3: | |
3555 | case DW_OP_reg4: | |
3556 | case DW_OP_reg5: | |
3557 | case DW_OP_reg6: | |
3558 | case DW_OP_reg7: | |
3559 | case DW_OP_reg8: | |
3560 | case DW_OP_reg9: | |
3561 | case DW_OP_reg10: | |
3562 | case DW_OP_reg11: | |
3563 | case DW_OP_reg12: | |
3564 | case DW_OP_reg13: | |
3565 | case DW_OP_reg14: | |
3566 | case DW_OP_reg15: | |
3567 | case DW_OP_reg16: | |
3568 | case DW_OP_reg17: | |
3569 | case DW_OP_reg18: | |
3570 | case DW_OP_reg19: | |
3571 | case DW_OP_reg20: | |
3572 | case DW_OP_reg21: | |
3573 | case DW_OP_reg22: | |
3574 | case DW_OP_reg23: | |
3575 | case DW_OP_reg24: | |
3576 | case DW_OP_reg25: | |
3577 | case DW_OP_reg26: | |
3578 | case DW_OP_reg27: | |
3579 | case DW_OP_reg28: | |
3580 | case DW_OP_reg29: | |
3581 | case DW_OP_reg30: | |
3582 | case DW_OP_reg31: | |
3583 | cfa->reg = op - DW_OP_reg0; | |
3584 | break; | |
3585 | case DW_OP_regx: | |
3586 | cfa->reg = ptr->dw_loc_oprnd1.v.val_int; | |
3587 | break; | |
3588 | case DW_OP_breg0: | |
3589 | case DW_OP_breg1: | |
3590 | case DW_OP_breg2: | |
3591 | case DW_OP_breg3: | |
3592 | case DW_OP_breg4: | |
3593 | case DW_OP_breg5: | |
3594 | case DW_OP_breg6: | |
3595 | case DW_OP_breg7: | |
3596 | case DW_OP_breg8: | |
3597 | case DW_OP_breg9: | |
3598 | case DW_OP_breg10: | |
3599 | case DW_OP_breg11: | |
3600 | case DW_OP_breg12: | |
3601 | case DW_OP_breg13: | |
3602 | case DW_OP_breg14: | |
3603 | case DW_OP_breg15: | |
3604 | case DW_OP_breg16: | |
3605 | case DW_OP_breg17: | |
3606 | case DW_OP_breg18: | |
3607 | case DW_OP_breg19: | |
3608 | case DW_OP_breg20: | |
3609 | case DW_OP_breg21: | |
3610 | case DW_OP_breg22: | |
3611 | case DW_OP_breg23: | |
3612 | case DW_OP_breg24: | |
3613 | case DW_OP_breg25: | |
3614 | case DW_OP_breg26: | |
3615 | case DW_OP_breg27: | |
3616 | case DW_OP_breg28: | |
3617 | case DW_OP_breg29: | |
3618 | case DW_OP_breg30: | |
3619 | case DW_OP_breg31: | |
3620 | cfa->reg = op - DW_OP_breg0; | |
3621 | cfa->base_offset = ptr->dw_loc_oprnd1.v.val_int; | |
3622 | break; | |
3623 | case DW_OP_bregx: | |
3624 | cfa->reg = ptr->dw_loc_oprnd1.v.val_int; | |
3625 | cfa->base_offset = ptr->dw_loc_oprnd2.v.val_int; | |
3626 | break; | |
3627 | case DW_OP_deref: | |
3628 | cfa->indirect = 1; | |
3629 | break; | |
3630 | case DW_OP_plus_uconst: | |
556273e0 | 3631 | cfa->offset = ptr->dw_loc_oprnd1.v.val_unsigned; |
7d9d8943 AM |
3632 | break; |
3633 | default: | |
ab532386 | 3634 | internal_error ("DW_LOC_OP %s not implemented", |
400500c4 | 3635 | dwarf_stack_op_name (ptr->dw_loc_opc)); |
7d9d8943 AM |
3636 | } |
3637 | } | |
3638 | } | |
3639 | #endif /* .debug_frame support */ | |
3640 | \f | |
3641 | /* And now, the support for symbolic debugging information. */ | |
3642 | #ifdef DWARF2_DEBUGGING_INFO | |
3643 | ||
117f9d28 | 3644 | /* .debug_str support. */ |
7080f735 AJ |
3645 | static int output_indirect_string (void **, void *); |
3646 | ||
3647 | static void dwarf2out_init (const char *); | |
3648 | static void dwarf2out_finish (const char *); | |
3649 | static void dwarf2out_define (unsigned int, const char *); | |
3650 | static void dwarf2out_undef (unsigned int, const char *); | |
3651 | static void dwarf2out_start_source_file (unsigned, const char *); | |
3652 | static void dwarf2out_end_source_file (unsigned); | |
3653 | static void dwarf2out_begin_block (unsigned, unsigned); | |
3654 | static void dwarf2out_end_block (unsigned, unsigned); | |
3655 | static bool dwarf2out_ignore_block (tree); | |
3656 | static void dwarf2out_global_decl (tree); | |
21d13d83 | 3657 | static void dwarf2out_type_decl (tree, int); |
6097b0c3 | 3658 | static void dwarf2out_imported_module_or_decl (tree, tree); |
7080f735 | 3659 | static void dwarf2out_abstract_function (tree); |
0a2d3d69 DB |
3660 | static void dwarf2out_var_location (rtx); |
3661 | static void dwarf2out_begin_function (tree); | |
87c8b4be | 3662 | static void dwarf2out_switch_text_section (void); |
7f905405 NB |
3663 | |
3664 | /* The debug hooks structure. */ | |
3665 | ||
54b6670a | 3666 | const struct gcc_debug_hooks dwarf2_debug_hooks = |
7f905405 NB |
3667 | { |
3668 | dwarf2out_init, | |
3669 | dwarf2out_finish, | |
3670 | dwarf2out_define, | |
3671 | dwarf2out_undef, | |
3672 | dwarf2out_start_source_file, | |
a5a42b92 NB |
3673 | dwarf2out_end_source_file, |
3674 | dwarf2out_begin_block, | |
e2a12aca | 3675 | dwarf2out_end_block, |
e1772ac0 | 3676 | dwarf2out_ignore_block, |
e2a12aca | 3677 | dwarf2out_source_line, |
653e276c | 3678 | dwarf2out_begin_prologue, |
702ada3d | 3679 | debug_nothing_int_charstar, /* end_prologue */ |
e2a12aca | 3680 | dwarf2out_end_epilogue, |
0a2d3d69 | 3681 | dwarf2out_begin_function, |
2b85879e NB |
3682 | debug_nothing_int, /* end_function */ |
3683 | dwarf2out_decl, /* function_decl */ | |
3684 | dwarf2out_global_decl, | |
21d13d83 | 3685 | dwarf2out_type_decl, /* type_decl */ |
6097b0c3 | 3686 | dwarf2out_imported_module_or_decl, |
e1772ac0 NB |
3687 | debug_nothing_tree, /* deferred_inline_function */ |
3688 | /* The DWARF 2 backend tries to reduce debugging bloat by not | |
3689 | emitting the abstract description of inline functions until | |
3690 | something tries to reference them. */ | |
3691 | dwarf2out_abstract_function, /* outlining_inline_function */ | |
33b49800 | 3692 | debug_nothing_rtx, /* label */ |
014a1138 | 3693 | debug_nothing_int, /* handle_pch */ |
9e9945c5 | 3694 | dwarf2out_var_location, |
87c8b4be | 3695 | dwarf2out_switch_text_section, |
9e9945c5 | 3696 | 1 /* start_end_main_source_file */ |
7f905405 | 3697 | }; |
17211ab5 | 3698 | #endif |
7f905405 | 3699 | \f |
7d9d8943 AM |
3700 | /* NOTE: In the comments in this file, many references are made to |
3701 | "Debugging Information Entries". This term is abbreviated as `DIE' | |
3702 | throughout the remainder of this file. */ | |
3703 | ||
3704 | /* An internal representation of the DWARF output is built, and then | |
3705 | walked to generate the DWARF debugging info. The walk of the internal | |
3706 | representation is done after the entire program has been compiled. | |
3707 | The types below are used to describe the internal representation. */ | |
3708 | ||
3709 | /* Various DIE's use offsets relative to the beginning of the | |
3710 | .debug_info section to refer to each other. */ | |
3711 | ||
3712 | typedef long int dw_offset; | |
3713 | ||
3714 | /* Define typedefs here to avoid circular dependencies. */ | |
3715 | ||
3716 | typedef struct dw_attr_struct *dw_attr_ref; | |
3717 | typedef struct dw_line_info_struct *dw_line_info_ref; | |
3718 | typedef struct dw_separate_line_info_struct *dw_separate_line_info_ref; | |
3719 | typedef struct pubname_struct *pubname_ref; | |
a20612aa | 3720 | typedef struct dw_ranges_struct *dw_ranges_ref; |
0435c1d5 | 3721 | typedef struct dw_ranges_by_label_struct *dw_ranges_by_label_ref; |
7d9d8943 AM |
3722 | |
3723 | /* Each entry in the line_info_table maintains the file and | |
3724 | line number associated with the label generated for that | |
3725 | entry. The label gives the PC value associated with | |
3726 | the line number entry. */ | |
3727 | ||
17211ab5 | 3728 | typedef struct dw_line_info_struct GTY(()) |
7d9d8943 AM |
3729 | { |
3730 | unsigned long dw_file_num; | |
3731 | unsigned long dw_line_num; | |
3732 | } | |
3733 | dw_line_info_entry; | |
3734 | ||
3735 | /* Line information for functions in separate sections; each one gets its | |
3736 | own sequence. */ | |
17211ab5 | 3737 | typedef struct dw_separate_line_info_struct GTY(()) |
7d9d8943 AM |
3738 | { |
3739 | unsigned long dw_file_num; | |
3740 | unsigned long dw_line_num; | |
3741 | unsigned long function; | |
3742 | } | |
3743 | dw_separate_line_info_entry; | |
3744 | ||
3745 | /* Each DIE attribute has a field specifying the attribute kind, | |
3746 | a link to the next attribute in the chain, and an attribute value. | |
3747 | Attributes are typically linked below the DIE they modify. */ | |
3748 | ||
17211ab5 | 3749 | typedef struct dw_attr_struct GTY(()) |
7d9d8943 AM |
3750 | { |
3751 | enum dwarf_attribute dw_attr; | |
7d9d8943 AM |
3752 | dw_val_node dw_attr_val; |
3753 | } | |
3754 | dw_attr_node; | |
3755 | ||
1a27722f GK |
3756 | DEF_VEC_O(dw_attr_node); |
3757 | DEF_VEC_ALLOC_O(dw_attr_node,gc); | |
3758 | ||
d6eeb3ba GK |
3759 | /* The Debugging Information Entry (DIE) structure. DIEs form a tree. |
3760 | The children of each node form a circular list linked by | |
3761 | die_sib. die_child points to the node *before* the "first" child node. */ | |
7d9d8943 | 3762 | |
17211ab5 | 3763 | typedef struct die_struct GTY(()) |
7d9d8943 AM |
3764 | { |
3765 | enum dwarf_tag die_tag; | |
881c6935 | 3766 | char *die_symbol; |
1a27722f | 3767 | VEC(dw_attr_node,gc) * die_attr; |
7d9d8943 AM |
3768 | dw_die_ref die_parent; |
3769 | dw_die_ref die_child; | |
3770 | dw_die_ref die_sib; | |
47fcfa7b | 3771 | dw_die_ref die_definition; /* ref from a specification to its definition */ |
7d9d8943 AM |
3772 | dw_offset die_offset; |
3773 | unsigned long die_abbrev; | |
1bfb5f8f | 3774 | int die_mark; |
33c9159e AH |
3775 | /* Die is used and must not be pruned as unused. */ |
3776 | int die_perennial_p; | |
636c7bc4 | 3777 | unsigned int decl_id; |
7d9d8943 AM |
3778 | } |
3779 | die_node; | |
3780 | ||
d6eeb3ba GK |
3781 | /* Evaluate 'expr' while 'c' is set to each child of DIE in order. */ |
3782 | #define FOR_EACH_CHILD(die, c, expr) do { \ | |
3783 | c = die->die_child; \ | |
3784 | if (c) do { \ | |
3785 | c = c->die_sib; \ | |
3786 | expr; \ | |
3787 | } while (c != die->die_child); \ | |
3788 | } while (0) | |
3789 | ||
7d9d8943 AM |
3790 | /* The pubname structure */ |
3791 | ||
17211ab5 | 3792 | typedef struct pubname_struct GTY(()) |
7d9d8943 AM |
3793 | { |
3794 | dw_die_ref die; | |
e01e0201 | 3795 | const char *name; |
7d9d8943 AM |
3796 | } |
3797 | pubname_entry; | |
3798 | ||
89708594 CT |
3799 | DEF_VEC_O(pubname_entry); |
3800 | DEF_VEC_ALLOC_O(pubname_entry, gc); | |
3801 | ||
17211ab5 | 3802 | struct dw_ranges_struct GTY(()) |
a20612aa | 3803 | { |
0435c1d5 AO |
3804 | /* If this is positive, it's a block number, otherwise it's a |
3805 | bitwise-negated index into dw_ranges_by_label. */ | |
3806 | int num; | |
3807 | }; | |
3808 | ||
3809 | struct dw_ranges_by_label_struct GTY(()) | |
3810 | { | |
3811 | const char *begin; | |
3812 | const char *end; | |
a20612aa RH |
3813 | }; |
3814 | ||
7d9d8943 | 3815 | /* The limbo die list structure. */ |
17211ab5 | 3816 | typedef struct limbo_die_struct GTY(()) |
7d9d8943 AM |
3817 | { |
3818 | dw_die_ref die; | |
54ba1f0d | 3819 | tree created_for; |
7d9d8943 AM |
3820 | struct limbo_die_struct *next; |
3821 | } | |
3822 | limbo_die_node; | |
3823 | ||
3824 | /* How to start an assembler comment. */ | |
3825 | #ifndef ASM_COMMENT_START | |
3826 | #define ASM_COMMENT_START ";#" | |
3827 | #endif | |
3828 | ||
cc2902df | 3829 | /* Define a macro which returns nonzero for a TYPE_DECL which was |
7d9d8943 AM |
3830 | implicitly generated for a tagged type. |
3831 | ||
3832 | Note that unlike the gcc front end (which generates a NULL named | |
3833 | TYPE_DECL node for each complete tagged type, each array type, and | |
3834 | each function type node created) the g++ front end generates a | |
3835 | _named_ TYPE_DECL node for each tagged type node created. | |
3836 | These TYPE_DECLs have DECL_ARTIFICIAL set, so we know not to | |
3837 | generate a DW_TAG_typedef DIE for them. */ | |
3838 | ||
3839 | #define TYPE_DECL_IS_STUB(decl) \ | |
3840 | (DECL_NAME (decl) == NULL_TREE \ | |
3841 | || (DECL_ARTIFICIAL (decl) \ | |
3842 | && is_tagged_type (TREE_TYPE (decl)) \ | |
3843 | && ((decl == TYPE_STUB_DECL (TREE_TYPE (decl))) \ | |
3844 | /* This is necessary for stub decls that \ | |
3845 | appear in nested inline functions. */ \ | |
3846 | || (DECL_ABSTRACT_ORIGIN (decl) != NULL_TREE \ | |
3847 | && (decl_ultimate_origin (decl) \ | |
3848 | == TYPE_STUB_DECL (TREE_TYPE (decl))))))) | |
3849 | ||
3850 | /* Information concerning the compilation unit's programming | |
3851 | language, and compiler version. */ | |
3852 | ||
7d9d8943 | 3853 | /* Fixed size portion of the DWARF compilation unit header. */ |
9eb0ef7a KB |
3854 | #define DWARF_COMPILE_UNIT_HEADER_SIZE \ |
3855 | (DWARF_INITIAL_LENGTH_SIZE + DWARF_OFFSET_SIZE + 3) | |
7d9d8943 | 3856 | |
7d9d8943 AM |
3857 | /* Fixed size portion of public names info. */ |
3858 | #define DWARF_PUBNAMES_HEADER_SIZE (2 * DWARF_OFFSET_SIZE + 2) | |
3859 | ||
3860 | /* Fixed size portion of the address range info. */ | |
3861 | #define DWARF_ARANGES_HEADER_SIZE \ | |
c583e7c3 | 3862 | (DWARF_ROUND (DWARF_INITIAL_LENGTH_SIZE + DWARF_OFFSET_SIZE + 4, \ |
2878ea73 | 3863 | DWARF2_ADDR_SIZE * 2) \ |
c583e7c3 | 3864 | - DWARF_INITIAL_LENGTH_SIZE) |
7d9d8943 AM |
3865 | |
3866 | /* Size of padding portion in the address range info. It must be | |
3867 | aligned to twice the pointer size. */ | |
3868 | #define DWARF_ARANGES_PAD_SIZE \ | |
c583e7c3 | 3869 | (DWARF_ROUND (DWARF_INITIAL_LENGTH_SIZE + DWARF_OFFSET_SIZE + 4, \ |
2878ea73 | 3870 | DWARF2_ADDR_SIZE * 2) \ |
c583e7c3 | 3871 | - (DWARF_INITIAL_LENGTH_SIZE + DWARF_OFFSET_SIZE + 4)) |
7d9d8943 | 3872 | |
9d147085 | 3873 | /* Use assembler line directives if available. */ |
7d9d8943 | 3874 | #ifndef DWARF2_ASM_LINE_DEBUG_INFO |
9d147085 RH |
3875 | #ifdef HAVE_AS_DWARF2_DEBUG_LINE |
3876 | #define DWARF2_ASM_LINE_DEBUG_INFO 1 | |
3877 | #else | |
7d9d8943 AM |
3878 | #define DWARF2_ASM_LINE_DEBUG_INFO 0 |
3879 | #endif | |
9d147085 | 3880 | #endif |
7d9d8943 | 3881 | |
7d9d8943 AM |
3882 | /* Minimum line offset in a special line info. opcode. |
3883 | This value was chosen to give a reasonable range of values. */ | |
3884 | #define DWARF_LINE_BASE -10 | |
3885 | ||
a1f300c0 | 3886 | /* First special line opcode - leave room for the standard opcodes. */ |
7d9d8943 AM |
3887 | #define DWARF_LINE_OPCODE_BASE 10 |
3888 | ||
3889 | /* Range of line offsets in a special line info. opcode. */ | |
3890 | #define DWARF_LINE_RANGE (254-DWARF_LINE_OPCODE_BASE+1) | |
3891 | ||
3892 | /* Flag that indicates the initial value of the is_stmt_start flag. | |
3893 | In the present implementation, we do not mark any lines as | |
3894 | the beginning of a source statement, because that information | |
3895 | is not made available by the GCC front-end. */ | |
3896 | #define DWARF_LINE_DEFAULT_IS_STMT_START 1 | |
3897 | ||
c1b50e49 | 3898 | #ifdef DWARF2_DEBUGGING_INFO |
7d9d8943 AM |
3899 | /* This location is used by calc_die_sizes() to keep track |
3900 | the offset of each DIE within the .debug_info section. */ | |
3901 | static unsigned long next_die_offset; | |
c1b50e49 | 3902 | #endif |
7d9d8943 AM |
3903 | |
3904 | /* Record the root of the DIE's built for the current compilation unit. */ | |
17211ab5 | 3905 | static GTY(()) dw_die_ref comp_unit_die; |
7d9d8943 AM |
3906 | |
3907 | /* A list of DIEs with a NULL parent waiting to be relocated. */ | |
17211ab5 | 3908 | static GTY(()) limbo_die_node *limbo_die_list; |
7d9d8943 | 3909 | |
981975b6 | 3910 | /* Filenames referenced by this compilation unit. */ |
d5688810 | 3911 | static GTY((param_is (struct dwarf_file_data))) htab_t file_table; |
2e18bbae | 3912 | |
636c7bc4 JZ |
3913 | /* A hash table of references to DIE's that describe declarations. |
3914 | The key is a DECL_UID() which is a unique number identifying each decl. */ | |
3915 | static GTY ((param_is (struct die_struct))) htab_t decl_die_table; | |
7d9d8943 | 3916 | |
0a2d3d69 DB |
3917 | /* Node of the variable location list. */ |
3918 | struct var_loc_node GTY ((chain_next ("%h.next"))) | |
3919 | { | |
3920 | rtx GTY (()) var_loc_note; | |
3921 | const char * GTY (()) label; | |
87c8b4be | 3922 | const char * GTY (()) section_label; |
0a2d3d69 DB |
3923 | struct var_loc_node * GTY (()) next; |
3924 | }; | |
3925 | ||
3926 | /* Variable location list. */ | |
3927 | struct var_loc_list_def GTY (()) | |
3928 | { | |
3929 | struct var_loc_node * GTY (()) first; | |
3930 | ||
3931 | /* Do not mark the last element of the chained list because | |
3932 | it is marked through the chain. */ | |
3933 | struct var_loc_node * GTY ((skip ("%h"))) last; | |
3934 | ||
3935 | /* DECL_UID of the variable decl. */ | |
3936 | unsigned int decl_id; | |
3937 | }; | |
3938 | typedef struct var_loc_list_def var_loc_list; | |
3939 | ||
0a2d3d69 DB |
3940 | |
3941 | /* Table of decl location linked lists. */ | |
3942 | static GTY ((param_is (var_loc_list))) htab_t decl_loc_table; | |
3943 | ||
7d9d8943 AM |
3944 | /* A pointer to the base of a list of references to DIE's that |
3945 | are uniquely identified by their tag, presence/absence of | |
3946 | children DIE's, and list of attribute/value pairs. */ | |
7080f735 | 3947 | static GTY((length ("abbrev_die_table_allocated"))) |
17211ab5 | 3948 | dw_die_ref *abbrev_die_table; |
7d9d8943 AM |
3949 | |
3950 | /* Number of elements currently allocated for abbrev_die_table. */ | |
c2e9147c | 3951 | static GTY(()) unsigned abbrev_die_table_allocated; |
7d9d8943 AM |
3952 | |
3953 | /* Number of elements in type_die_table currently in use. */ | |
c2e9147c | 3954 | static GTY(()) unsigned abbrev_die_table_in_use; |
7d9d8943 AM |
3955 | |
3956 | /* Size (in elements) of increments by which we may expand the | |
3957 | abbrev_die_table. */ | |
3958 | #define ABBREV_DIE_TABLE_INCREMENT 256 | |
3959 | ||
3960 | /* A pointer to the base of a table that contains line information | |
3961 | for each source code line in .text in the compilation unit. */ | |
7080f735 | 3962 | static GTY((length ("line_info_table_allocated"))) |
17211ab5 | 3963 | dw_line_info_ref line_info_table; |
7d9d8943 AM |
3964 | |
3965 | /* Number of elements currently allocated for line_info_table. */ | |
c2e9147c | 3966 | static GTY(()) unsigned line_info_table_allocated; |
7d9d8943 | 3967 | |
17211ab5 | 3968 | /* Number of elements in line_info_table currently in use. */ |
c2e9147c | 3969 | static GTY(()) unsigned line_info_table_in_use; |
7d9d8943 | 3970 | |
1146e682 GK |
3971 | /* True if the compilation unit places functions in more than one section. */ |
3972 | static GTY(()) bool have_multiple_function_sections = false; | |
43f237b4 | 3973 | |
7d9d8943 AM |
3974 | /* A pointer to the base of a table that contains line information |
3975 | for each source code line outside of .text in the compilation unit. */ | |
17211ab5 GK |
3976 | static GTY ((length ("separate_line_info_table_allocated"))) |
3977 | dw_separate_line_info_ref separate_line_info_table; | |
7d9d8943 AM |
3978 | |
3979 | /* Number of elements currently allocated for separate_line_info_table. */ | |
c2e9147c | 3980 | static GTY(()) unsigned separate_line_info_table_allocated; |
7d9d8943 | 3981 | |
17211ab5 | 3982 | /* Number of elements in separate_line_info_table currently in use. */ |
c2e9147c | 3983 | static GTY(()) unsigned separate_line_info_table_in_use; |
7d9d8943 AM |
3984 | |
3985 | /* Size (in elements) of increments by which we may expand the | |
3986 | line_info_table. */ | |
3987 | #define LINE_INFO_TABLE_INCREMENT 1024 | |
3988 | ||
3989 | /* A pointer to the base of a table that contains a list of publicly | |
3990 | accessible names. */ | |
89708594 | 3991 | static GTY (()) VEC (pubname_entry, gc) * pubname_table; |
7d9d8943 | 3992 | |
89708594 CT |
3993 | /* A pointer to the base of a table that contains a list of publicly |
3994 | accessible types. */ | |
3995 | static GTY (()) VEC (pubname_entry, gc) * pubtype_table; | |
7d9d8943 | 3996 | |
a20612aa | 3997 | /* Array of dies for which we should generate .debug_arange info. */ |
17211ab5 | 3998 | static GTY((length ("arange_table_allocated"))) dw_die_ref *arange_table; |
7d9d8943 AM |
3999 | |
4000 | /* Number of elements currently allocated for arange_table. */ | |
c2e9147c | 4001 | static GTY(()) unsigned arange_table_allocated; |
7d9d8943 AM |
4002 | |
4003 | /* Number of elements in arange_table currently in use. */ | |
c2e9147c | 4004 | static GTY(()) unsigned arange_table_in_use; |
7d9d8943 AM |
4005 | |
4006 | /* Size (in elements) of increments by which we may expand the | |
4007 | arange_table. */ | |
4008 | #define ARANGE_TABLE_INCREMENT 64 | |
4009 | ||
a20612aa | 4010 | /* Array of dies for which we should generate .debug_ranges info. */ |
17211ab5 | 4011 | static GTY ((length ("ranges_table_allocated"))) dw_ranges_ref ranges_table; |
a20612aa RH |
4012 | |
4013 | /* Number of elements currently allocated for ranges_table. */ | |
c2e9147c | 4014 | static GTY(()) unsigned ranges_table_allocated; |
a20612aa RH |
4015 | |
4016 | /* Number of elements in ranges_table currently in use. */ | |
c2e9147c | 4017 | static GTY(()) unsigned ranges_table_in_use; |
a20612aa | 4018 | |
0435c1d5 AO |
4019 | /* Array of pairs of labels referenced in ranges_table. */ |
4020 | static GTY ((length ("ranges_by_label_allocated"))) | |
4021 | dw_ranges_by_label_ref ranges_by_label; | |
4022 | ||
4023 | /* Number of elements currently allocated for ranges_by_label. */ | |
4024 | static GTY(()) unsigned ranges_by_label_allocated; | |
4025 | ||
4026 | /* Number of elements in ranges_by_label currently in use. */ | |
4027 | static GTY(()) unsigned ranges_by_label_in_use; | |
4028 | ||
a20612aa RH |
4029 | /* Size (in elements) of increments by which we may expand the |
4030 | ranges_table. */ | |
4031 | #define RANGES_TABLE_INCREMENT 64 | |
4032 | ||
63e46568 | 4033 | /* Whether we have location lists that need outputting */ |
1146e682 | 4034 | static GTY(()) bool have_location_lists; |
63e46568 | 4035 | |
57d4f65c ZW |
4036 | /* Unique label counter. */ |
4037 | static GTY(()) unsigned int loclabel_num; | |
4038 | ||
c2e9147c | 4039 | #ifdef DWARF2_DEBUGGING_INFO |
7d9d8943 AM |
4040 | /* Record whether the function being analyzed contains inlined functions. */ |
4041 | static int current_function_has_inlines; | |
c1b50e49 | 4042 | #endif |
7d9d8943 AM |
4043 | #if 0 && defined (MIPS_DEBUGGING_INFO) |
4044 | static int comp_unit_has_inlines; | |
4045 | #endif | |
4046 | ||
d5688810 GK |
4047 | /* The last file entry emitted by maybe_emit_file(). */ |
4048 | static GTY(()) struct dwarf_file_data * last_emitted_file; | |
c2e9147c | 4049 | |
71c0e7fc | 4050 | /* Number of internal labels generated by gen_internal_sym(). */ |
c2e9147c GK |
4051 | static GTY(()) int label_num; |
4052 | ||
66cccea6 AP |
4053 | /* Cached result of previous call to lookup_filename. */ |
4054 | static GTY(()) struct dwarf_file_data * file_table_last_lookup; | |
4055 | ||
17211ab5 GK |
4056 | #ifdef DWARF2_DEBUGGING_INFO |
4057 | ||
35d177a2 | 4058 | /* Offset from the "steady-state frame pointer" to the frame base, |
30e6f306 | 4059 | within the current function. */ |
35d177a2 | 4060 | static HOST_WIDE_INT frame_pointer_fb_offset; |
30e6f306 | 4061 | |
7d9d8943 AM |
4062 | /* Forward declarations for functions defined in this file. */ |
4063 | ||
7080f735 AJ |
4064 | static int is_pseudo_reg (rtx); |
4065 | static tree type_main_variant (tree); | |
4066 | static int is_tagged_type (tree); | |
4067 | static const char *dwarf_tag_name (unsigned); | |
4068 | static const char *dwarf_attr_name (unsigned); | |
4069 | static const char *dwarf_form_name (unsigned); | |
7080f735 AJ |
4070 | static tree decl_ultimate_origin (tree); |
4071 | static tree block_ultimate_origin (tree); | |
4072 | static tree decl_class_context (tree); | |
4073 | static void add_dwarf_attr (dw_die_ref, dw_attr_ref); | |
4074 | static inline enum dw_val_class AT_class (dw_attr_ref); | |
4075 | static void add_AT_flag (dw_die_ref, enum dwarf_attribute, unsigned); | |
4076 | static inline unsigned AT_flag (dw_attr_ref); | |
799f628a JH |
4077 | static void add_AT_int (dw_die_ref, enum dwarf_attribute, HOST_WIDE_INT); |
4078 | static inline HOST_WIDE_INT AT_int (dw_attr_ref); | |
4079 | static void add_AT_unsigned (dw_die_ref, enum dwarf_attribute, unsigned HOST_WIDE_INT); | |
4080 | static inline unsigned HOST_WIDE_INT AT_unsigned (dw_attr_ref); | |
7080f735 AJ |
4081 | static void add_AT_long_long (dw_die_ref, enum dwarf_attribute, unsigned long, |
4082 | unsigned long); | |
e7ee3914 AM |
4083 | static inline void add_AT_vec (dw_die_ref, enum dwarf_attribute, unsigned int, |
4084 | unsigned int, unsigned char *); | |
7080f735 AJ |
4085 | static hashval_t debug_str_do_hash (const void *); |
4086 | static int debug_str_eq (const void *, const void *); | |
4087 | static void add_AT_string (dw_die_ref, enum dwarf_attribute, const char *); | |
4088 | static inline const char *AT_string (dw_attr_ref); | |
4089 | static int AT_string_form (dw_attr_ref); | |
4090 | static void add_AT_die_ref (dw_die_ref, enum dwarf_attribute, dw_die_ref); | |
47fcfa7b | 4091 | static void add_AT_specification (dw_die_ref, dw_die_ref); |
7080f735 AJ |
4092 | static inline dw_die_ref AT_ref (dw_attr_ref); |
4093 | static inline int AT_ref_external (dw_attr_ref); | |
4094 | static inline void set_AT_ref_external (dw_attr_ref, int); | |
4095 | static void add_AT_fde_ref (dw_die_ref, enum dwarf_attribute, unsigned); | |
4096 | static void add_AT_loc (dw_die_ref, enum dwarf_attribute, dw_loc_descr_ref); | |
4097 | static inline dw_loc_descr_ref AT_loc (dw_attr_ref); | |
4098 | static void add_AT_loc_list (dw_die_ref, enum dwarf_attribute, | |
4099 | dw_loc_list_ref); | |
4100 | static inline dw_loc_list_ref AT_loc_list (dw_attr_ref); | |
4101 | static void add_AT_addr (dw_die_ref, enum dwarf_attribute, rtx); | |
4102 | static inline rtx AT_addr (dw_attr_ref); | |
4103 | static void add_AT_lbl_id (dw_die_ref, enum dwarf_attribute, const char *); | |
192d0f89 GK |
4104 | static void add_AT_lineptr (dw_die_ref, enum dwarf_attribute, const char *); |
4105 | static void add_AT_macptr (dw_die_ref, enum dwarf_attribute, const char *); | |
799f628a JH |
4106 | static void add_AT_offset (dw_die_ref, enum dwarf_attribute, |
4107 | unsigned HOST_WIDE_INT); | |
7080f735 AJ |
4108 | static void add_AT_range_list (dw_die_ref, enum dwarf_attribute, |
4109 | unsigned long); | |
4110 | static inline const char *AT_lbl (dw_attr_ref); | |
4111 | static dw_attr_ref get_AT (dw_die_ref, enum dwarf_attribute); | |
4112 | static const char *get_AT_low_pc (dw_die_ref); | |
4113 | static const char *get_AT_hi_pc (dw_die_ref); | |
4114 | static const char *get_AT_string (dw_die_ref, enum dwarf_attribute); | |
4115 | static int get_AT_flag (dw_die_ref, enum dwarf_attribute); | |
4116 | static unsigned get_AT_unsigned (dw_die_ref, enum dwarf_attribute); | |
4117 | static inline dw_die_ref get_AT_ref (dw_die_ref, enum dwarf_attribute); | |
4118 | static bool is_c_family (void); | |
4119 | static bool is_cxx (void); | |
4120 | static bool is_java (void); | |
4121 | static bool is_fortran (void); | |
4122 | static bool is_ada (void); | |
4123 | static void remove_AT (dw_die_ref, enum dwarf_attribute); | |
6097b0c3 | 4124 | static void remove_child_TAG (dw_die_ref, enum dwarf_tag); |
7080f735 AJ |
4125 | static void add_child_die (dw_die_ref, dw_die_ref); |
4126 | static dw_die_ref new_die (enum dwarf_tag, dw_die_ref, tree); | |
4127 | static dw_die_ref lookup_type_die (tree); | |
4128 | static void equate_type_number_to_die (tree, dw_die_ref); | |
636c7bc4 JZ |
4129 | static hashval_t decl_die_table_hash (const void *); |
4130 | static int decl_die_table_eq (const void *, const void *); | |
7080f735 | 4131 | static dw_die_ref lookup_decl_die (tree); |
0a2d3d69 DB |
4132 | static hashval_t decl_loc_table_hash (const void *); |
4133 | static int decl_loc_table_eq (const void *, const void *); | |
4134 | static var_loc_list *lookup_decl_loc (tree); | |
7080f735 | 4135 | static void equate_decl_number_to_die (tree, dw_die_ref); |
0a2d3d69 | 4136 | static void add_var_loc_to_decl (tree, struct var_loc_node *); |
7080f735 AJ |
4137 | static void print_spaces (FILE *); |
4138 | static void print_die (dw_die_ref, FILE *); | |
4139 | static void print_dwarf_line_table (FILE *); | |
7080f735 AJ |
4140 | static dw_die_ref push_new_compile_unit (dw_die_ref, dw_die_ref); |
4141 | static dw_die_ref pop_compile_unit (dw_die_ref); | |
4142 | static void loc_checksum (dw_loc_descr_ref, struct md5_ctx *); | |
4143 | static void attr_checksum (dw_attr_ref, struct md5_ctx *, int *); | |
4144 | static void die_checksum (dw_die_ref, struct md5_ctx *, int *); | |
4145 | static int same_loc_p (dw_loc_descr_ref, dw_loc_descr_ref, int *); | |
4146 | static int same_dw_val_p (dw_val_node *, dw_val_node *, int *); | |
4147 | static int same_attr_p (dw_attr_ref, dw_attr_ref, int *); | |
4148 | static int same_die_p (dw_die_ref, dw_die_ref, int *); | |
4149 | static int same_die_p_wrap (dw_die_ref, dw_die_ref); | |
4150 | static void compute_section_prefix (dw_die_ref); | |
4151 | static int is_type_die (dw_die_ref); | |
4152 | static int is_comdat_die (dw_die_ref); | |
4153 | static int is_symbol_die (dw_die_ref); | |
4154 | static void assign_symbol_names (dw_die_ref); | |
4155 | static void break_out_includes (dw_die_ref); | |
4156 | static hashval_t htab_cu_hash (const void *); | |
4157 | static int htab_cu_eq (const void *, const void *); | |
4158 | static void htab_cu_del (void *); | |
4159 | static int check_duplicate_cu (dw_die_ref, htab_t, unsigned *); | |
4160 | static void record_comdat_symbol_number (dw_die_ref, htab_t, unsigned); | |
4161 | static void add_sibling_attributes (dw_die_ref); | |
4162 | static void build_abbrev_table (dw_die_ref); | |
4163 | static void output_location_lists (dw_die_ref); | |
4164 | static int constant_size (long unsigned); | |
4165 | static unsigned long size_of_die (dw_die_ref); | |
4166 | static void calc_die_sizes (dw_die_ref); | |
4167 | static void mark_dies (dw_die_ref); | |
4168 | static void unmark_dies (dw_die_ref); | |
4169 | static void unmark_all_dies (dw_die_ref); | |
89708594 | 4170 | static unsigned long size_of_pubnames (VEC (pubname_entry,gc) *); |
7080f735 AJ |
4171 | static unsigned long size_of_aranges (void); |
4172 | static enum dwarf_form value_format (dw_attr_ref); | |
4173 | static void output_value_format (dw_attr_ref); | |
4174 | static void output_abbrev_section (void); | |
4175 | static void output_die_symbol (dw_die_ref); | |
4176 | static void output_die (dw_die_ref); | |
4177 | static void output_compilation_unit_header (void); | |
4178 | static void output_comp_unit (dw_die_ref, int); | |
4179 | static const char *dwarf2_name (tree, int); | |
4180 | static void add_pubname (tree, dw_die_ref); | |
89708594 CT |
4181 | static void add_pubtype (tree, dw_die_ref); |
4182 | static void output_pubnames (VEC (pubname_entry,gc) *); | |
7080f735 AJ |
4183 | static void add_arange (tree, dw_die_ref); |
4184 | static void output_aranges (void); | |
0435c1d5 | 4185 | static unsigned int add_ranges_num (int); |
7080f735 | 4186 | static unsigned int add_ranges (tree); |
0435c1d5 | 4187 | static unsigned int add_ranges_by_labels (const char *, const char *); |
7080f735 AJ |
4188 | static void output_ranges (void); |
4189 | static void output_line_info (void); | |
4190 | static void output_file_names (void); | |
4191 | static dw_die_ref base_type_die (tree); | |
7080f735 | 4192 | static int is_base_type (tree); |
e7d23ce3 | 4193 | static bool is_subrange_type (tree); |
fbfd77b8 | 4194 | static dw_die_ref subrange_type_die (tree, dw_die_ref); |
7080f735 AJ |
4195 | static dw_die_ref modified_type_die (tree, int, int, dw_die_ref); |
4196 | static int type_is_enum (tree); | |
23959f19 | 4197 | static unsigned int dbx_reg_number (rtx); |
216448c7 | 4198 | static void add_loc_descr_op_piece (dw_loc_descr_ref *, int); |
62760ffd CT |
4199 | static dw_loc_descr_ref reg_loc_descriptor (rtx, enum var_init_status); |
4200 | static dw_loc_descr_ref one_reg_loc_descriptor (unsigned int, | |
4201 | enum var_init_status); | |
4202 | static dw_loc_descr_ref multiple_reg_loc_descriptor (rtx, rtx, | |
4203 | enum var_init_status); | |
7080f735 | 4204 | static dw_loc_descr_ref int_loc_descriptor (HOST_WIDE_INT); |
62760ffd CT |
4205 | static dw_loc_descr_ref based_loc_descr (rtx, HOST_WIDE_INT, |
4206 | enum var_init_status); | |
7080f735 | 4207 | static int is_based_loc (rtx); |
62760ffd CT |
4208 | static dw_loc_descr_ref mem_loc_descriptor (rtx, enum machine_mode mode, |
4209 | enum var_init_status); | |
4210 | static dw_loc_descr_ref concat_loc_descriptor (rtx, rtx, | |
4211 | enum var_init_status); | |
4212 | static dw_loc_descr_ref loc_descriptor (rtx, enum var_init_status); | |
1a186ec5 RH |
4213 | static dw_loc_descr_ref loc_descriptor_from_tree_1 (tree, int); |
4214 | static dw_loc_descr_ref loc_descriptor_from_tree (tree); | |
7080f735 AJ |
4215 | static HOST_WIDE_INT ceiling (HOST_WIDE_INT, unsigned int); |
4216 | static tree field_type (tree); | |
4217 | static unsigned int simple_type_align_in_bits (tree); | |
4218 | static unsigned int simple_decl_align_in_bits (tree); | |
4219 | static unsigned HOST_WIDE_INT simple_type_size_in_bits (tree); | |
4220 | static HOST_WIDE_INT field_byte_offset (tree); | |
4221 | static void add_AT_location_description (dw_die_ref, enum dwarf_attribute, | |
4222 | dw_loc_descr_ref); | |
4223 | static void add_data_member_location_attribute (dw_die_ref, tree); | |
4224 | static void add_const_value_attribute (dw_die_ref, rtx); | |
e7ee3914 AM |
4225 | static void insert_int (HOST_WIDE_INT, unsigned, unsigned char *); |
4226 | static HOST_WIDE_INT extract_int (const unsigned char *, unsigned); | |
4227 | static void insert_float (rtx, unsigned char *); | |
7080f735 | 4228 | static rtx rtl_for_decl_location (tree); |
0a2d3d69 DB |
4229 | static void add_location_or_const_value_attribute (dw_die_ref, tree, |
4230 | enum dwarf_attribute); | |
7080f735 AJ |
4231 | static void tree_add_const_value_attribute (dw_die_ref, tree); |
4232 | static void add_name_attribute (dw_die_ref, const char *); | |
4233 | static void add_comp_dir_attribute (dw_die_ref); | |
4234 | static void add_bound_info (dw_die_ref, enum dwarf_attribute, tree); | |
4235 | static void add_subscript_info (dw_die_ref, tree); | |
4236 | static void add_byte_size_attribute (dw_die_ref, tree); | |
4237 | static void add_bit_offset_attribute (dw_die_ref, tree); | |
4238 | static void add_bit_size_attribute (dw_die_ref, tree); | |
4239 | static void add_prototyped_attribute (dw_die_ref, tree); | |
4240 | static void add_abstract_origin_attribute (dw_die_ref, tree); | |
4241 | static void add_pure_or_virtual_attribute (dw_die_ref, tree); | |
4242 | static void add_src_coords_attributes (dw_die_ref, tree); | |
4243 | static void add_name_and_src_coords_attributes (dw_die_ref, tree); | |
4244 | static void push_decl_scope (tree); | |
4245 | static void pop_decl_scope (void); | |
4246 | static dw_die_ref scope_die_for (tree, dw_die_ref); | |
4247 | static inline int local_scope_p (dw_die_ref); | |
66c78aa9 | 4248 | static inline int class_or_namespace_scope_p (dw_die_ref); |
7080f735 | 4249 | static void add_type_attribute (dw_die_ref, tree, int, int, dw_die_ref); |
a1c496cb | 4250 | static void add_calling_convention_attribute (dw_die_ref, tree); |
7080f735 AJ |
4251 | static const char *type_tag (tree); |
4252 | static tree member_declared_type (tree); | |
7d9d8943 | 4253 | #if 0 |
7080f735 | 4254 | static const char *decl_start_label (tree); |
7d9d8943 | 4255 | #endif |
7080f735 | 4256 | static void gen_array_type_die (tree, dw_die_ref); |
7d9d8943 | 4257 | #if 0 |
7080f735 | 4258 | static void gen_entry_point_die (tree, dw_die_ref); |
7d9d8943 | 4259 | #endif |
7080f735 AJ |
4260 | static void gen_inlined_enumeration_type_die (tree, dw_die_ref); |
4261 | static void gen_inlined_structure_type_die (tree, dw_die_ref); | |
4262 | static void gen_inlined_union_type_die (tree, dw_die_ref); | |
de99511b | 4263 | static dw_die_ref gen_enumeration_type_die (tree, dw_die_ref); |
7080f735 AJ |
4264 | static dw_die_ref gen_formal_parameter_die (tree, dw_die_ref); |
4265 | static void gen_unspecified_parameters_die (tree, dw_die_ref); | |
4266 | static void gen_formal_types_die (tree, dw_die_ref); | |
4267 | static void gen_subprogram_die (tree, dw_die_ref); | |
4268 | static void gen_variable_die (tree, dw_die_ref); | |
4269 | static void gen_label_die (tree, dw_die_ref); | |
4270 | static void gen_lexical_block_die (tree, dw_die_ref, int); | |
4271 | static void gen_inlined_subroutine_die (tree, dw_die_ref, int); | |
4272 | static void gen_field_die (tree, dw_die_ref); | |
4273 | static void gen_ptr_to_mbr_type_die (tree, dw_die_ref); | |
4274 | static dw_die_ref gen_compile_unit_die (const char *); | |
7080f735 AJ |
4275 | static void gen_inheritance_die (tree, tree, dw_die_ref); |
4276 | static void gen_member_die (tree, dw_die_ref); | |
39ef6592 LC |
4277 | static void gen_struct_or_union_type_die (tree, dw_die_ref, |
4278 | enum debug_info_usage); | |
7080f735 AJ |
4279 | static void gen_subroutine_type_die (tree, dw_die_ref); |
4280 | static void gen_typedef_die (tree, dw_die_ref); | |
4281 | static void gen_type_die (tree, dw_die_ref); | |
4282 | static void gen_tagged_type_instantiation_die (tree, dw_die_ref); | |
4283 | static void gen_block_die (tree, dw_die_ref, int); | |
4284 | static void decls_for_scope (tree, dw_die_ref, int); | |
4285 | static int is_redundant_typedef (tree); | |
66c78aa9 | 4286 | static void gen_namespace_die (tree); |
7080f735 | 4287 | static void gen_decl_die (tree, dw_die_ref); |
6097b0c3 DP |
4288 | static dw_die_ref force_decl_die (tree); |
4289 | static dw_die_ref force_type_die (tree); | |
66c78aa9 JM |
4290 | static dw_die_ref setup_namespace_context (tree, dw_die_ref); |
4291 | static void declare_in_namespace (tree, dw_die_ref); | |
d5688810 | 4292 | static struct dwarf_file_data * lookup_filename (const char *); |
7080f735 AJ |
4293 | static void retry_incomplete_types (void); |
4294 | static void gen_type_die_for_member (tree, tree, dw_die_ref); | |
4295 | static void splice_child_die (dw_die_ref, dw_die_ref); | |
4296 | static int file_info_cmp (const void *, const void *); | |
4297 | static dw_loc_list_ref new_loc_list (dw_loc_descr_ref, const char *, | |
4298 | const char *, const char *, unsigned); | |
4299 | static void add_loc_descr_to_loc_list (dw_loc_list_ref *, dw_loc_descr_ref, | |
4300 | const char *, const char *, | |
4301 | const char *); | |
4302 | static void output_loc_list (dw_loc_list_ref); | |
4303 | static char *gen_internal_sym (const char *); | |
4304 | ||
4305 | static void prune_unmark_dies (dw_die_ref); | |
4306 | static void prune_unused_types_mark (dw_die_ref, int); | |
4307 | static void prune_unused_types_walk (dw_die_ref); | |
4308 | static void prune_unused_types_walk_attribs (dw_die_ref); | |
4309 | static void prune_unused_types_prune (dw_die_ref); | |
4310 | static void prune_unused_types (void); | |
d5688810 | 4311 | static int maybe_emit_file (struct dwarf_file_data *fd); |
73c68f61 | 4312 | |
7d9d8943 AM |
4313 | /* Section names used to hold DWARF debugging information. */ |
4314 | #ifndef DEBUG_INFO_SECTION | |
4315 | #define DEBUG_INFO_SECTION ".debug_info" | |
4316 | #endif | |
9d2f2c45 RH |
4317 | #ifndef DEBUG_ABBREV_SECTION |
4318 | #define DEBUG_ABBREV_SECTION ".debug_abbrev" | |
7d9d8943 | 4319 | #endif |
9d2f2c45 RH |
4320 | #ifndef DEBUG_ARANGES_SECTION |
4321 | #define DEBUG_ARANGES_SECTION ".debug_aranges" | |
7d9d8943 | 4322 | #endif |
9d2f2c45 RH |
4323 | #ifndef DEBUG_MACINFO_SECTION |
4324 | #define DEBUG_MACINFO_SECTION ".debug_macinfo" | |
7d9d8943 AM |
4325 | #endif |
4326 | #ifndef DEBUG_LINE_SECTION | |
4327 | #define DEBUG_LINE_SECTION ".debug_line" | |
4328 | #endif | |
9d2f2c45 RH |
4329 | #ifndef DEBUG_LOC_SECTION |
4330 | #define DEBUG_LOC_SECTION ".debug_loc" | |
7d9d8943 | 4331 | #endif |
9d2f2c45 RH |
4332 | #ifndef DEBUG_PUBNAMES_SECTION |
4333 | #define DEBUG_PUBNAMES_SECTION ".debug_pubnames" | |
7d9d8943 | 4334 | #endif |
9d2f2c45 RH |
4335 | #ifndef DEBUG_STR_SECTION |
4336 | #define DEBUG_STR_SECTION ".debug_str" | |
7d9d8943 | 4337 | #endif |
a20612aa RH |
4338 | #ifndef DEBUG_RANGES_SECTION |
4339 | #define DEBUG_RANGES_SECTION ".debug_ranges" | |
4340 | #endif | |
7d9d8943 AM |
4341 | |
4342 | /* Standard ELF section names for compiled code and data. */ | |
f99ffb60 RH |
4343 | #ifndef TEXT_SECTION_NAME |
4344 | #define TEXT_SECTION_NAME ".text" | |
7d9d8943 AM |
4345 | #endif |
4346 | ||
9eb4015a | 4347 | /* Section flags for .debug_str section. */ |
9eb4015a | 4348 | #define DEBUG_STR_SECTION_FLAGS \ |
5d4856a0 | 4349 | (HAVE_GAS_SHF_MERGE && flag_merge_constants \ |
b0c242c0 AM |
4350 | ? SECTION_DEBUG | SECTION_MERGE | SECTION_STRINGS | 1 \ |
4351 | : SECTION_DEBUG) | |
9eb4015a | 4352 | |
7d9d8943 | 4353 | /* Labels we insert at beginning sections we can reference instead of |
556273e0 | 4354 | the section names themselves. */ |
7d9d8943 AM |
4355 | |
4356 | #ifndef TEXT_SECTION_LABEL | |
9d2f2c45 | 4357 | #define TEXT_SECTION_LABEL "Ltext" |
7d9d8943 | 4358 | #endif |
c7466dee CT |
4359 | #ifndef COLD_TEXT_SECTION_LABEL |
4360 | #define COLD_TEXT_SECTION_LABEL "Ltext_cold" | |
4361 | #endif | |
7d9d8943 | 4362 | #ifndef DEBUG_LINE_SECTION_LABEL |
9d2f2c45 | 4363 | #define DEBUG_LINE_SECTION_LABEL "Ldebug_line" |
7d9d8943 AM |
4364 | #endif |
4365 | #ifndef DEBUG_INFO_SECTION_LABEL | |
9d2f2c45 | 4366 | #define DEBUG_INFO_SECTION_LABEL "Ldebug_info" |
7d9d8943 | 4367 | #endif |
9d2f2c45 RH |
4368 | #ifndef DEBUG_ABBREV_SECTION_LABEL |
4369 | #define DEBUG_ABBREV_SECTION_LABEL "Ldebug_abbrev" | |
7d9d8943 | 4370 | #endif |
9d2f2c45 RH |
4371 | #ifndef DEBUG_LOC_SECTION_LABEL |
4372 | #define DEBUG_LOC_SECTION_LABEL "Ldebug_loc" | |
63e46568 | 4373 | #endif |
2bee6045 JJ |
4374 | #ifndef DEBUG_RANGES_SECTION_LABEL |
4375 | #define DEBUG_RANGES_SECTION_LABEL "Ldebug_ranges" | |
4376 | #endif | |
84a5b4f8 DB |
4377 | #ifndef DEBUG_MACINFO_SECTION_LABEL |
4378 | #define DEBUG_MACINFO_SECTION_LABEL "Ldebug_macinfo" | |
4379 | #endif | |
a20612aa | 4380 | |
7d9d8943 AM |
4381 | /* Definitions of defaults for formats and names of various special |
4382 | (artificial) labels which may be generated within this file (when the -g | |
def66b10 | 4383 | options is used and DWARF2_DEBUGGING_INFO is in effect. |
7d9d8943 AM |
4384 | If necessary, these may be overridden from within the tm.h file, but |
4385 | typically, overriding these defaults is unnecessary. */ | |
4386 | ||
4387 | static char text_end_label[MAX_ARTIFICIAL_LABEL_BYTES]; | |
4388 | static char text_section_label[MAX_ARTIFICIAL_LABEL_BYTES]; | |
c7466dee | 4389 | static char cold_text_section_label[MAX_ARTIFICIAL_LABEL_BYTES]; |
2878ea73 | 4390 | static char cold_end_label[MAX_ARTIFICIAL_LABEL_BYTES]; |
7d9d8943 AM |
4391 | static char abbrev_section_label[MAX_ARTIFICIAL_LABEL_BYTES]; |
4392 | static char debug_info_section_label[MAX_ARTIFICIAL_LABEL_BYTES]; | |
4393 | static char debug_line_section_label[MAX_ARTIFICIAL_LABEL_BYTES]; | |
84a5b4f8 | 4394 | static char macinfo_section_label[MAX_ARTIFICIAL_LABEL_BYTES]; |
63e46568 | 4395 | static char loc_section_label[MAX_ARTIFICIAL_LABEL_BYTES]; |
2bee6045 | 4396 | static char ranges_section_label[2 * MAX_ARTIFICIAL_LABEL_BYTES]; |
2ad9852d | 4397 | |
7d9d8943 AM |
4398 | #ifndef TEXT_END_LABEL |
4399 | #define TEXT_END_LABEL "Letext" | |
4400 | #endif | |
c7466dee CT |
4401 | #ifndef COLD_END_LABEL |
4402 | #define COLD_END_LABEL "Letext_cold" | |
4403 | #endif | |
7d9d8943 AM |
4404 | #ifndef BLOCK_BEGIN_LABEL |
4405 | #define BLOCK_BEGIN_LABEL "LBB" | |
4406 | #endif | |
4407 | #ifndef BLOCK_END_LABEL | |
4408 | #define BLOCK_END_LABEL "LBE" | |
4409 | #endif | |
7d9d8943 AM |
4410 | #ifndef LINE_CODE_LABEL |
4411 | #define LINE_CODE_LABEL "LM" | |
4412 | #endif | |
4413 | #ifndef SEPARATE_LINE_CODE_LABEL | |
4414 | #define SEPARATE_LINE_CODE_LABEL "LSM" | |
4415 | #endif | |
4416 | \f | |
4417 | /* We allow a language front-end to designate a function that is to be | |
3f117656 | 4418 | called to "demangle" any name before it is put into a DIE. */ |
7d9d8943 | 4419 | |
7080f735 | 4420 | static const char *(*demangle_name_func) (const char *); |
7d9d8943 AM |
4421 | |
4422 | void | |
7080f735 | 4423 | dwarf2out_set_demangle_name_func (const char *(*func) (const char *)) |
7d9d8943 AM |
4424 | { |
4425 | demangle_name_func = func; | |
4426 | } | |
7d9d8943 AM |
4427 | |
4428 | /* Test if rtl node points to a pseudo register. */ | |
4429 | ||
4430 | static inline int | |
7080f735 | 4431 | is_pseudo_reg (rtx rtl) |
7d9d8943 | 4432 | { |
f8cfc6aa | 4433 | return ((REG_P (rtl) && REGNO (rtl) >= FIRST_PSEUDO_REGISTER) |
7d9d8943 | 4434 | || (GET_CODE (rtl) == SUBREG |
ddef6bc7 | 4435 | && REGNO (SUBREG_REG (rtl)) >= FIRST_PSEUDO_REGISTER)); |
7d9d8943 AM |
4436 | } |
4437 | ||
4438 | /* Return a reference to a type, with its const and volatile qualifiers | |
4439 | removed. */ | |
4440 | ||
4441 | static inline tree | |
7080f735 | 4442 | type_main_variant (tree type) |
7d9d8943 AM |
4443 | { |
4444 | type = TYPE_MAIN_VARIANT (type); | |
4445 | ||
2ad9852d RK |
4446 | /* ??? There really should be only one main variant among any group of |
4447 | variants of a given type (and all of the MAIN_VARIANT values for all | |
4448 | members of the group should point to that one type) but sometimes the C | |
4449 | front-end messes this up for array types, so we work around that bug | |
4450 | here. */ | |
7d9d8943 AM |
4451 | if (TREE_CODE (type) == ARRAY_TYPE) |
4452 | while (type != TYPE_MAIN_VARIANT (type)) | |
4453 | type = TYPE_MAIN_VARIANT (type); | |
4454 | ||
4455 | return type; | |
4456 | } | |
4457 | ||
cc2902df | 4458 | /* Return nonzero if the given type node represents a tagged type. */ |
7d9d8943 AM |
4459 | |
4460 | static inline int | |
7080f735 | 4461 | is_tagged_type (tree type) |
7d9d8943 | 4462 | { |
b3694847 | 4463 | enum tree_code code = TREE_CODE (type); |
7d9d8943 AM |
4464 | |
4465 | return (code == RECORD_TYPE || code == UNION_TYPE | |
4466 | || code == QUAL_UNION_TYPE || code == ENUMERAL_TYPE); | |
4467 | } | |
4468 | ||
4469 | /* Convert a DIE tag into its string name. */ | |
4470 | ||
4471 | static const char * | |
7080f735 | 4472 | dwarf_tag_name (unsigned int tag) |
7d9d8943 AM |
4473 | { |
4474 | switch (tag) | |
4475 | { | |
4476 | case DW_TAG_padding: | |
4477 | return "DW_TAG_padding"; | |
4478 | case DW_TAG_array_type: | |
4479 | return "DW_TAG_array_type"; | |
4480 | case DW_TAG_class_type: | |
4481 | return "DW_TAG_class_type"; | |
4482 | case DW_TAG_entry_point: | |
4483 | return "DW_TAG_entry_point"; | |
4484 | case DW_TAG_enumeration_type: | |
4485 | return "DW_TAG_enumeration_type"; | |
4486 | case DW_TAG_formal_parameter: | |
4487 | return "DW_TAG_formal_parameter"; | |
4488 | case DW_TAG_imported_declaration: | |
4489 | return "DW_TAG_imported_declaration"; | |
4490 | case DW_TAG_label: | |
4491 | return "DW_TAG_label"; | |
4492 | case DW_TAG_lexical_block: | |
4493 | return "DW_TAG_lexical_block"; | |
4494 | case DW_TAG_member: | |
4495 | return "DW_TAG_member"; | |
4496 | case DW_TAG_pointer_type: | |
4497 | return "DW_TAG_pointer_type"; | |
4498 | case DW_TAG_reference_type: | |
4499 | return "DW_TAG_reference_type"; | |
4500 | case DW_TAG_compile_unit: | |
4501 | return "DW_TAG_compile_unit"; | |
4502 | case DW_TAG_string_type: | |
4503 | return "DW_TAG_string_type"; | |
4504 | case DW_TAG_structure_type: | |
4505 | return "DW_TAG_structure_type"; | |
4506 | case DW_TAG_subroutine_type: | |
4507 | return "DW_TAG_subroutine_type"; | |
4508 | case DW_TAG_typedef: | |
4509 | return "DW_TAG_typedef"; | |
4510 | case DW_TAG_union_type: | |
4511 | return "DW_TAG_union_type"; | |
4512 | case DW_TAG_unspecified_parameters: | |
4513 | return "DW_TAG_unspecified_parameters"; | |
4514 | case DW_TAG_variant: | |
4515 | return "DW_TAG_variant"; | |
4516 | case DW_TAG_common_block: | |
4517 | return "DW_TAG_common_block"; | |
4518 | case DW_TAG_common_inclusion: | |
4519 | return "DW_TAG_common_inclusion"; | |
4520 | case DW_TAG_inheritance: | |
4521 | return "DW_TAG_inheritance"; | |
4522 | case DW_TAG_inlined_subroutine: | |
4523 | return "DW_TAG_inlined_subroutine"; | |
4524 | case DW_TAG_module: | |
4525 | return "DW_TAG_module"; | |
4526 | case DW_TAG_ptr_to_member_type: | |
4527 | return "DW_TAG_ptr_to_member_type"; | |
4528 | case DW_TAG_set_type: | |
4529 | return "DW_TAG_set_type"; | |
4530 | case DW_TAG_subrange_type: | |
4531 | return "DW_TAG_subrange_type"; | |
4532 | case DW_TAG_with_stmt: | |
4533 | return "DW_TAG_with_stmt"; | |
4534 | case DW_TAG_access_declaration: | |
4535 | return "DW_TAG_access_declaration"; | |
4536 | case DW_TAG_base_type: | |
4537 | return "DW_TAG_base_type"; | |
4538 | case DW_TAG_catch_block: | |
4539 | return "DW_TAG_catch_block"; | |
4540 | case DW_TAG_const_type: | |
4541 | return "DW_TAG_const_type"; | |
4542 | case DW_TAG_constant: | |
4543 | return "DW_TAG_constant"; | |
4544 | case DW_TAG_enumerator: | |
4545 | return "DW_TAG_enumerator"; | |
4546 | case DW_TAG_file_type: | |
4547 | return "DW_TAG_file_type"; | |
4548 | case DW_TAG_friend: | |
4549 | return "DW_TAG_friend"; | |
4550 | case DW_TAG_namelist: | |
4551 | return "DW_TAG_namelist"; | |
4552 | case DW_TAG_namelist_item: | |
4553 | return "DW_TAG_namelist_item"; | |
66c78aa9 JM |
4554 | case DW_TAG_namespace: |
4555 | return "DW_TAG_namespace"; | |
7d9d8943 AM |
4556 | case DW_TAG_packed_type: |
4557 | return "DW_TAG_packed_type"; | |
4558 | case DW_TAG_subprogram: | |
4559 | return "DW_TAG_subprogram"; | |
4560 | case DW_TAG_template_type_param: | |
4561 | return "DW_TAG_template_type_param"; | |
4562 | case DW_TAG_template_value_param: | |
4563 | return "DW_TAG_template_value_param"; | |
4564 | case DW_TAG_thrown_type: | |
4565 | return "DW_TAG_thrown_type"; | |
4566 | case DW_TAG_try_block: | |
4567 | return "DW_TAG_try_block"; | |
4568 | case DW_TAG_variant_part: | |
4569 | return "DW_TAG_variant_part"; | |
4570 | case DW_TAG_variable: | |
4571 | return "DW_TAG_variable"; | |
4572 | case DW_TAG_volatile_type: | |
4573 | return "DW_TAG_volatile_type"; | |
6097b0c3 DP |
4574 | case DW_TAG_imported_module: |
4575 | return "DW_TAG_imported_module"; | |
7d9d8943 AM |
4576 | case DW_TAG_MIPS_loop: |
4577 | return "DW_TAG_MIPS_loop"; | |
4578 | case DW_TAG_format_label: | |
4579 | return "DW_TAG_format_label"; | |
4580 | case DW_TAG_function_template: | |
4581 | return "DW_TAG_function_template"; | |
4582 | case DW_TAG_class_template: | |
4583 | return "DW_TAG_class_template"; | |
881c6935 JM |
4584 | case DW_TAG_GNU_BINCL: |
4585 | return "DW_TAG_GNU_BINCL"; | |
4586 | case DW_TAG_GNU_EINCL: | |
4587 | return "DW_TAG_GNU_EINCL"; | |
7d9d8943 AM |
4588 | default: |
4589 | return "DW_TAG_<unknown>"; | |
4590 | } | |
4591 | } | |
4592 | ||
4593 | /* Convert a DWARF attribute code into its string name. */ | |
4594 | ||
4595 | static const char * | |
7080f735 | 4596 | dwarf_attr_name (unsigned int attr) |
7d9d8943 AM |
4597 | { |
4598 | switch (attr) | |
4599 | { | |
4600 | case DW_AT_sibling: | |
4601 | return "DW_AT_sibling"; | |
4602 | case DW_AT_location: | |
4603 | return "DW_AT_location"; | |
4604 | case DW_AT_name: | |
4605 | return "DW_AT_name"; | |
4606 | case DW_AT_ordering: | |
4607 | return "DW_AT_ordering"; | |
4608 | case DW_AT_subscr_data: | |
4609 | return "DW_AT_subscr_data"; | |
4610 | case DW_AT_byte_size: | |
4611 | return "DW_AT_byte_size"; | |
4612 | case DW_AT_bit_offset: | |
4613 | return "DW_AT_bit_offset"; | |
4614 | case DW_AT_bit_size: | |
4615 | return "DW_AT_bit_size"; | |
4616 | case DW_AT_element_list: | |
4617 | return "DW_AT_element_list"; | |
4618 | case DW_AT_stmt_list: | |
4619 | return "DW_AT_stmt_list"; | |
4620 | case DW_AT_low_pc: | |
4621 | return "DW_AT_low_pc"; | |
4622 | case DW_AT_high_pc: | |
4623 | return "DW_AT_high_pc"; | |
4624 | case DW_AT_language: | |
4625 | return "DW_AT_language"; | |
4626 | case DW_AT_member: | |
4627 | return "DW_AT_member"; | |
4628 | case DW_AT_discr: | |
4629 | return "DW_AT_discr"; | |
4630 | case DW_AT_discr_value: | |
4631 | return "DW_AT_discr_value"; | |
4632 | case DW_AT_visibility: | |
4633 | return "DW_AT_visibility"; | |
4634 | case DW_AT_import: | |
4635 | return "DW_AT_import"; | |
4636 | case DW_AT_string_length: | |
4637 | return "DW_AT_string_length"; | |
4638 | case DW_AT_common_reference: | |
4639 | return "DW_AT_common_reference"; | |
4640 | case DW_AT_comp_dir: | |
4641 | return "DW_AT_comp_dir"; | |
4642 | case DW_AT_const_value: | |
4643 | return "DW_AT_const_value"; | |
4644 | case DW_AT_containing_type: | |
4645 | return "DW_AT_containing_type"; | |
4646 | case DW_AT_default_value: | |
4647 | return "DW_AT_default_value"; | |
4648 | case DW_AT_inline: | |
4649 | return "DW_AT_inline"; | |
4650 | case DW_AT_is_optional: | |
4651 | return "DW_AT_is_optional"; | |
4652 | case DW_AT_lower_bound: | |
4653 | return "DW_AT_lower_bound"; | |
4654 | case DW_AT_producer: | |
4655 | return "DW_AT_producer"; | |
4656 | case DW_AT_prototyped: | |
4657 | return "DW_AT_prototyped"; | |
4658 | case DW_AT_return_addr: | |
4659 | return "DW_AT_return_addr"; | |
4660 | case DW_AT_start_scope: | |
4661 | return "DW_AT_start_scope"; | |
4662 | case DW_AT_stride_size: | |
4663 | return "DW_AT_stride_size"; | |
4664 | case DW_AT_upper_bound: | |
4665 | return "DW_AT_upper_bound"; | |
4666 | case DW_AT_abstract_origin: | |
4667 | return "DW_AT_abstract_origin"; | |
4668 | case DW_AT_accessibility: | |
4669 | return "DW_AT_accessibility"; | |
4670 | case DW_AT_address_class: | |
4671 | return "DW_AT_address_class"; | |
4672 | case DW_AT_artificial: | |
4673 | return "DW_AT_artificial"; | |
4674 | case DW_AT_base_types: | |
4675 | return "DW_AT_base_types"; | |
4676 | case DW_AT_calling_convention: | |
4677 | return "DW_AT_calling_convention"; | |
4678 | case DW_AT_count: | |
4679 | return "DW_AT_count"; | |
4680 | case DW_AT_data_member_location: | |
4681 | return "DW_AT_data_member_location"; | |
4682 | case DW_AT_decl_column: | |
4683 | return "DW_AT_decl_column"; | |
4684 | case DW_AT_decl_file: | |
4685 | return "DW_AT_decl_file"; | |
4686 | case DW_AT_decl_line: | |
4687 | return "DW_AT_decl_line"; | |
4688 | case DW_AT_declaration: | |
4689 | return "DW_AT_declaration"; | |
4690 | case DW_AT_discr_list: | |
4691 | return "DW_AT_discr_list"; | |
4692 | case DW_AT_encoding: | |
4693 | return "DW_AT_encoding"; | |
4694 | case DW_AT_external: | |
4695 | return "DW_AT_external"; | |
4696 | case DW_AT_frame_base: | |
4697 | return "DW_AT_frame_base"; | |
4698 | case DW_AT_friend: | |
4699 | return "DW_AT_friend"; | |
4700 | case DW_AT_identifier_case: | |
4701 | return "DW_AT_identifier_case"; | |
4702 | case DW_AT_macro_info: | |
4703 | return "DW_AT_macro_info"; | |
4704 | case DW_AT_namelist_items: | |
4705 | return "DW_AT_namelist_items"; | |
4706 | case DW_AT_priority: | |
4707 | return "DW_AT_priority"; | |
4708 | case DW_AT_segment: | |
4709 | return "DW_AT_segment"; | |
4710 | case DW_AT_specification: | |
4711 | return "DW_AT_specification"; | |
4712 | case DW_AT_static_link: | |
4713 | return "DW_AT_static_link"; | |
4714 | case DW_AT_type: | |
4715 | return "DW_AT_type"; | |
4716 | case DW_AT_use_location: | |
4717 | return "DW_AT_use_location"; | |
4718 | case DW_AT_variable_parameter: | |
4719 | return "DW_AT_variable_parameter"; | |
4720 | case DW_AT_virtuality: | |
4721 | return "DW_AT_virtuality"; | |
4722 | case DW_AT_vtable_elem_location: | |
4723 | return "DW_AT_vtable_elem_location"; | |
4724 | ||
a20612aa RH |
4725 | case DW_AT_allocated: |
4726 | return "DW_AT_allocated"; | |
4727 | case DW_AT_associated: | |
4728 | return "DW_AT_associated"; | |
4729 | case DW_AT_data_location: | |
4730 | return "DW_AT_data_location"; | |
4731 | case DW_AT_stride: | |
4732 | return "DW_AT_stride"; | |
4733 | case DW_AT_entry_pc: | |
4734 | return "DW_AT_entry_pc"; | |
4735 | case DW_AT_use_UTF8: | |
4736 | return "DW_AT_use_UTF8"; | |
4737 | case DW_AT_extension: | |
4738 | return "DW_AT_extension"; | |
4739 | case DW_AT_ranges: | |
4740 | return "DW_AT_ranges"; | |
4741 | case DW_AT_trampoline: | |
4742 | return "DW_AT_trampoline"; | |
4743 | case DW_AT_call_column: | |
4744 | return "DW_AT_call_column"; | |
4745 | case DW_AT_call_file: | |
4746 | return "DW_AT_call_file"; | |
4747 | case DW_AT_call_line: | |
4748 | return "DW_AT_call_line"; | |
4749 | ||
7d9d8943 AM |
4750 | case DW_AT_MIPS_fde: |
4751 | return "DW_AT_MIPS_fde"; | |
4752 | case DW_AT_MIPS_loop_begin: | |
4753 | return "DW_AT_MIPS_loop_begin"; | |
4754 | case DW_AT_MIPS_tail_loop_begin: | |
4755 | return "DW_AT_MIPS_tail_loop_begin"; | |
4756 | case DW_AT_MIPS_epilog_begin: | |
4757 | return "DW_AT_MIPS_epilog_begin"; | |
4758 | case DW_AT_MIPS_loop_unroll_factor: | |
4759 | return "DW_AT_MIPS_loop_unroll_factor"; | |
4760 | case DW_AT_MIPS_software_pipeline_depth: | |
4761 | return "DW_AT_MIPS_software_pipeline_depth"; | |
4762 | case DW_AT_MIPS_linkage_name: | |
4763 | return "DW_AT_MIPS_linkage_name"; | |
4764 | case DW_AT_MIPS_stride: | |
4765 | return "DW_AT_MIPS_stride"; | |
4766 | case DW_AT_MIPS_abstract_name: | |
4767 | return "DW_AT_MIPS_abstract_name"; | |
4768 | case DW_AT_MIPS_clone_origin: | |
4769 | return "DW_AT_MIPS_clone_origin"; | |
4770 | case DW_AT_MIPS_has_inlines: | |
4771 | return "DW_AT_MIPS_has_inlines"; | |
4772 | ||
4773 | case DW_AT_sf_names: | |
4774 | return "DW_AT_sf_names"; | |
4775 | case DW_AT_src_info: | |
4776 | return "DW_AT_src_info"; | |
4777 | case DW_AT_mac_info: | |
4778 | return "DW_AT_mac_info"; | |
4779 | case DW_AT_src_coords: | |
4780 | return "DW_AT_src_coords"; | |
4781 | case DW_AT_body_begin: | |
4782 | return "DW_AT_body_begin"; | |
4783 | case DW_AT_body_end: | |
4784 | return "DW_AT_body_end"; | |
84f0ace0 JM |
4785 | case DW_AT_GNU_vector: |
4786 | return "DW_AT_GNU_vector"; | |
4787 | ||
7a0c8d71 DR |
4788 | case DW_AT_VMS_rtnbeg_pd_address: |
4789 | return "DW_AT_VMS_rtnbeg_pd_address"; | |
4790 | ||
7d9d8943 AM |
4791 | default: |
4792 | return "DW_AT_<unknown>"; | |
4793 | } | |
4794 | } | |
4795 | ||
4796 | /* Convert a DWARF value form code into its string name. */ | |
4797 | ||
4798 | static const char * | |
7080f735 | 4799 | dwarf_form_name (unsigned int form) |
7d9d8943 AM |
4800 | { |
4801 | switch (form) | |
4802 | { | |
4803 | case DW_FORM_addr: | |
4804 | return "DW_FORM_addr"; | |
4805 | case DW_FORM_block2: | |
4806 | return "DW_FORM_block2"; | |
4807 | case DW_FORM_block4: | |
4808 | return "DW_FORM_block4"; | |
4809 | case DW_FORM_data2: | |
4810 | return "DW_FORM_data2"; | |
4811 | case DW_FORM_data4: | |
4812 | return "DW_FORM_data4"; | |
4813 | case DW_FORM_data8: | |
4814 | return "DW_FORM_data8"; | |
4815 | case DW_FORM_string: | |
4816 | return "DW_FORM_string"; | |
4817 | case DW_FORM_block: | |
4818 | return "DW_FORM_block"; | |
4819 | case DW_FORM_block1: | |
4820 | return "DW_FORM_block1"; | |
4821 | case DW_FORM_data1: | |
4822 | return "DW_FORM_data1"; | |
4823 | case DW_FORM_flag: | |
4824 | return "DW_FORM_flag"; | |
4825 | case DW_FORM_sdata: | |
4826 | return "DW_FORM_sdata"; | |
4827 | case DW_FORM_strp: | |
4828 | return "DW_FORM_strp"; | |
4829 | case DW_FORM_udata: | |
4830 | return "DW_FORM_udata"; | |
4831 | case DW_FORM_ref_addr: | |
4832 | return "DW_FORM_ref_addr"; | |
4833 | case DW_FORM_ref1: | |
4834 | return "DW_FORM_ref1"; | |
4835 | case DW_FORM_ref2: | |
4836 | return "DW_FORM_ref2"; | |
4837 | case DW_FORM_ref4: | |
4838 | return "DW_FORM_ref4"; | |
4839 | case DW_FORM_ref8: | |
4840 | return "DW_FORM_ref8"; | |
4841 | case DW_FORM_ref_udata: | |
4842 | return "DW_FORM_ref_udata"; | |
4843 | case DW_FORM_indirect: | |
4844 | return "DW_FORM_indirect"; | |
3f76745e | 4845 | default: |
7d9d8943 | 4846 | return "DW_FORM_<unknown>"; |
a3f97cbb JW |
4847 | } |
4848 | } | |
3f76745e JM |
4849 | \f |
4850 | /* Determine the "ultimate origin" of a decl. The decl may be an inlined | |
4851 | instance of an inlined instance of a decl which is local to an inline | |
4852 | function, so we have to trace all of the way back through the origin chain | |
4853 | to find out what sort of node actually served as the original seed for the | |
4854 | given block. */ | |
a3f97cbb | 4855 | |
3f76745e | 4856 | static tree |
7080f735 | 4857 | decl_ultimate_origin (tree decl) |
a3f97cbb | 4858 | { |
820cc88f DB |
4859 | if (!CODE_CONTAINS_STRUCT (TREE_CODE (decl), TS_DECL_COMMON)) |
4860 | return NULL_TREE; | |
4861 | ||
10a11b75 JM |
4862 | /* output_inline_function sets DECL_ABSTRACT_ORIGIN for all the |
4863 | nodes in the function to point to themselves; ignore that if | |
4864 | we're trying to output the abstract instance of this function. */ | |
4865 | if (DECL_ABSTRACT (decl) && DECL_ABSTRACT_ORIGIN (decl) == decl) | |
4866 | return NULL_TREE; | |
4867 | ||
ced3f397 NS |
4868 | /* Since the DECL_ABSTRACT_ORIGIN for a DECL is supposed to be the |
4869 | most distant ancestor, this should never happen. */ | |
4870 | gcc_assert (!DECL_FROM_INLINE (DECL_ORIGIN (decl))); | |
3f76745e | 4871 | |
02e24c7a | 4872 | return DECL_ABSTRACT_ORIGIN (decl); |
a3f97cbb JW |
4873 | } |
4874 | ||
3f76745e JM |
4875 | /* Determine the "ultimate origin" of a block. The block may be an inlined |
4876 | instance of an inlined instance of a block which is local to an inline | |
4877 | function, so we have to trace all of the way back through the origin chain | |
4878 | to find out what sort of node actually served as the original seed for the | |
4879 | given block. */ | |
71dfc51f | 4880 | |
3f76745e | 4881 | static tree |
7080f735 | 4882 | block_ultimate_origin (tree block) |
a3f97cbb | 4883 | { |
b3694847 | 4884 | tree immediate_origin = BLOCK_ABSTRACT_ORIGIN (block); |
71dfc51f | 4885 | |
10a11b75 JM |
4886 | /* output_inline_function sets BLOCK_ABSTRACT_ORIGIN for all the |
4887 | nodes in the function to point to themselves; ignore that if | |
4888 | we're trying to output the abstract instance of this function. */ | |
4889 | if (BLOCK_ABSTRACT (block) && immediate_origin == block) | |
4890 | return NULL_TREE; | |
4891 | ||
3f76745e JM |
4892 | if (immediate_origin == NULL_TREE) |
4893 | return NULL_TREE; | |
4894 | else | |
4895 | { | |
b3694847 SS |
4896 | tree ret_val; |
4897 | tree lookahead = immediate_origin; | |
71dfc51f | 4898 | |
3f76745e JM |
4899 | do |
4900 | { | |
4901 | ret_val = lookahead; | |
2ad9852d RK |
4902 | lookahead = (TREE_CODE (ret_val) == BLOCK |
4903 | ? BLOCK_ABSTRACT_ORIGIN (ret_val) : NULL); | |
3f76745e JM |
4904 | } |
4905 | while (lookahead != NULL && lookahead != ret_val); | |
2878ea73 | 4906 | |
1eb3331e DB |
4907 | /* The block's abstract origin chain may not be the *ultimate* origin of |
4908 | the block. It could lead to a DECL that has an abstract origin set. | |
4909 | If so, we want that DECL's abstract origin (which is what DECL_ORIGIN | |
4910 | will give us if it has one). Note that DECL's abstract origins are | |
4911 | supposed to be the most distant ancestor (or so decl_ultimate_origin | |
4912 | claims), so we don't need to loop following the DECL origins. */ | |
4913 | if (DECL_P (ret_val)) | |
4914 | return DECL_ORIGIN (ret_val); | |
3f76745e JM |
4915 | |
4916 | return ret_val; | |
4917 | } | |
a3f97cbb JW |
4918 | } |
4919 | ||
3f76745e JM |
4920 | /* Get the class to which DECL belongs, if any. In g++, the DECL_CONTEXT |
4921 | of a virtual function may refer to a base class, so we check the 'this' | |
4922 | parameter. */ | |
71dfc51f | 4923 | |
3f76745e | 4924 | static tree |
7080f735 | 4925 | decl_class_context (tree decl) |
a3f97cbb | 4926 | { |
3f76745e | 4927 | tree context = NULL_TREE; |
71dfc51f | 4928 | |
3f76745e JM |
4929 | if (TREE_CODE (decl) != FUNCTION_DECL || ! DECL_VINDEX (decl)) |
4930 | context = DECL_CONTEXT (decl); | |
4931 | else | |
4932 | context = TYPE_MAIN_VARIANT | |
4933 | (TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (decl))))); | |
71dfc51f | 4934 | |
2f939d94 | 4935 | if (context && !TYPE_P (context)) |
3f76745e JM |
4936 | context = NULL_TREE; |
4937 | ||
4938 | return context; | |
a3f97cbb JW |
4939 | } |
4940 | \f | |
d6eeb3ba | 4941 | /* Add an attribute/value pair to a DIE. */ |
71dfc51f RK |
4942 | |
4943 | static inline void | |
7080f735 | 4944 | add_dwarf_attr (dw_die_ref die, dw_attr_ref attr) |
a3f97cbb | 4945 | { |
1a27722f GK |
4946 | /* Maybe this should be an assert? */ |
4947 | if (die == NULL) | |
4948 | return; | |
2878ea73 | 4949 | |
1a27722f GK |
4950 | if (die->die_attr == NULL) |
4951 | die->die_attr = VEC_alloc (dw_attr_node, gc, 1); | |
4952 | VEC_safe_push (dw_attr_node, gc, die->die_attr, attr); | |
a3f97cbb JW |
4953 | } |
4954 | ||
17211ab5 | 4955 | static inline enum dw_val_class |
7080f735 | 4956 | AT_class (dw_attr_ref a) |
a96c67ec JM |
4957 | { |
4958 | return a->dw_attr_val.val_class; | |
4959 | } | |
4960 | ||
3f76745e | 4961 | /* Add a flag value attribute to a DIE. */ |
71dfc51f | 4962 | |
3f76745e | 4963 | static inline void |
7080f735 | 4964 | add_AT_flag (dw_die_ref die, enum dwarf_attribute attr_kind, unsigned int flag) |
a3f97cbb | 4965 | { |
1a27722f | 4966 | dw_attr_node attr; |
71dfc51f | 4967 | |
1a27722f GK |
4968 | attr.dw_attr = attr_kind; |
4969 | attr.dw_attr_val.val_class = dw_val_class_flag; | |
4970 | attr.dw_attr_val.v.val_flag = flag; | |
4971 | add_dwarf_attr (die, &attr); | |
a3f97cbb JW |
4972 | } |
4973 | ||
a96c67ec | 4974 | static inline unsigned |
7080f735 | 4975 | AT_flag (dw_attr_ref a) |
a96c67ec | 4976 | { |
ced3f397 NS |
4977 | gcc_assert (a && AT_class (a) == dw_val_class_flag); |
4978 | return a->dw_attr_val.v.val_flag; | |
a96c67ec JM |
4979 | } |
4980 | ||
3f76745e | 4981 | /* Add a signed integer attribute value to a DIE. */ |
71dfc51f | 4982 | |
3f76745e | 4983 | static inline void |
799f628a | 4984 | add_AT_int (dw_die_ref die, enum dwarf_attribute attr_kind, HOST_WIDE_INT int_val) |
a3f97cbb | 4985 | { |
1a27722f | 4986 | dw_attr_node attr; |
3f76745e | 4987 | |
1a27722f GK |
4988 | attr.dw_attr = attr_kind; |
4989 | attr.dw_attr_val.val_class = dw_val_class_const; | |
4990 | attr.dw_attr_val.v.val_int = int_val; | |
4991 | add_dwarf_attr (die, &attr); | |
a3f97cbb JW |
4992 | } |
4993 | ||
799f628a | 4994 | static inline HOST_WIDE_INT |
7080f735 | 4995 | AT_int (dw_attr_ref a) |
a96c67ec | 4996 | { |
ced3f397 NS |
4997 | gcc_assert (a && AT_class (a) == dw_val_class_const); |
4998 | return a->dw_attr_val.v.val_int; | |
a96c67ec JM |
4999 | } |
5000 | ||
3f76745e | 5001 | /* Add an unsigned integer attribute value to a DIE. */ |
71dfc51f | 5002 | |
3f76745e | 5003 | static inline void |
7080f735 | 5004 | add_AT_unsigned (dw_die_ref die, enum dwarf_attribute attr_kind, |
799f628a | 5005 | unsigned HOST_WIDE_INT unsigned_val) |
a3f97cbb | 5006 | { |
1a27722f | 5007 | dw_attr_node attr; |
3f76745e | 5008 | |
1a27722f GK |
5009 | attr.dw_attr = attr_kind; |
5010 | attr.dw_attr_val.val_class = dw_val_class_unsigned_const; | |
5011 | attr.dw_attr_val.v.val_unsigned = unsigned_val; | |
5012 | add_dwarf_attr (die, &attr); | |
a3f97cbb | 5013 | } |
71dfc51f | 5014 | |
799f628a | 5015 | static inline unsigned HOST_WIDE_INT |
7080f735 | 5016 | AT_unsigned (dw_attr_ref a) |
a96c67ec | 5017 | { |
ced3f397 NS |
5018 | gcc_assert (a && AT_class (a) == dw_val_class_unsigned_const); |
5019 | return a->dw_attr_val.v.val_unsigned; | |
a96c67ec JM |
5020 | } |
5021 | ||
3f76745e JM |
5022 | /* Add an unsigned double integer attribute value to a DIE. */ |
5023 | ||
5024 | static inline void | |
7080f735 AJ |
5025 | add_AT_long_long (dw_die_ref die, enum dwarf_attribute attr_kind, |
5026 | long unsigned int val_hi, long unsigned int val_low) | |
a3f97cbb | 5027 | { |
1a27722f | 5028 | dw_attr_node attr; |
71dfc51f | 5029 | |
1a27722f GK |
5030 | attr.dw_attr = attr_kind; |
5031 | attr.dw_attr_val.val_class = dw_val_class_long_long; | |
5032 | attr.dw_attr_val.v.val_long_long.hi = val_hi; | |
5033 | attr.dw_attr_val.v.val_long_long.low = val_low; | |
5034 | add_dwarf_attr (die, &attr); | |
3f76745e | 5035 | } |
71dfc51f | 5036 | |
3f76745e | 5037 | /* Add a floating point attribute value to a DIE and return it. */ |
71dfc51f | 5038 | |
3f76745e | 5039 | static inline void |
e7ee3914 AM |
5040 | add_AT_vec (dw_die_ref die, enum dwarf_attribute attr_kind, |
5041 | unsigned int length, unsigned int elt_size, unsigned char *array) | |
3f76745e | 5042 | { |
1a27722f | 5043 | dw_attr_node attr; |
3f76745e | 5044 | |
1a27722f GK |
5045 | attr.dw_attr = attr_kind; |
5046 | attr.dw_attr_val.val_class = dw_val_class_vec; | |
5047 | attr.dw_attr_val.v.val_vec.length = length; | |
5048 | attr.dw_attr_val.v.val_vec.elt_size = elt_size; | |
5049 | attr.dw_attr_val.v.val_vec.array = array; | |
5050 | add_dwarf_attr (die, &attr); | |
a3f97cbb JW |
5051 | } |
5052 | ||
17211ab5 GK |
5053 | /* Hash and equality functions for debug_str_hash. */ |
5054 | ||
5055 | static hashval_t | |
7080f735 | 5056 | debug_str_do_hash (const void *x) |
17211ab5 GK |
5057 | { |
5058 | return htab_hash_string (((const struct indirect_string_node *)x)->str); | |
5059 | } | |
5060 | ||
5061 | static int | |
7080f735 | 5062 | debug_str_eq (const void *x1, const void *x2) |
17211ab5 GK |
5063 | { |
5064 | return strcmp ((((const struct indirect_string_node *)x1)->str), | |
5065 | (const char *)x2) == 0; | |
5066 | } | |
5067 | ||
3f76745e | 5068 | /* Add a string attribute value to a DIE. */ |
71dfc51f | 5069 | |
3f76745e | 5070 | static inline void |
7080f735 | 5071 | add_AT_string (dw_die_ref die, enum dwarf_attribute attr_kind, const char *str) |
a3f97cbb | 5072 | { |
1a27722f | 5073 | dw_attr_node attr; |
9eb4015a | 5074 | struct indirect_string_node *node; |
fad205ff | 5075 | void **slot; |
c26fbbca | 5076 | |
9eb4015a | 5077 | if (! debug_str_hash) |
7080f735 | 5078 | debug_str_hash = htab_create_ggc (10, debug_str_do_hash, |
17211ab5 GK |
5079 | debug_str_eq, NULL); |
5080 | ||
5081 | slot = htab_find_slot_with_hash (debug_str_hash, str, | |
5082 | htab_hash_string (str), INSERT); | |
5083 | if (*slot == NULL) | |
a0ad3539 MM |
5084 | { |
5085 | node = (struct indirect_string_node *) | |
5086 | ggc_alloc_cleared (sizeof (struct indirect_string_node)); | |
5087 | node->str = ggc_strdup (str); | |
5088 | *slot = node; | |
5089 | } | |
5090 | else | |
5091 | node = (struct indirect_string_node *) *slot; | |
5092 | ||
9eb4015a | 5093 | node->refcount++; |
71dfc51f | 5094 | |
1a27722f GK |
5095 | attr.dw_attr = attr_kind; |
5096 | attr.dw_attr_val.val_class = dw_val_class_str; | |
5097 | attr.dw_attr_val.v.val_str = node; | |
5098 | add_dwarf_attr (die, &attr); | |
3f76745e | 5099 | } |
71dfc51f | 5100 | |
a96c67ec | 5101 | static inline const char * |
7080f735 | 5102 | AT_string (dw_attr_ref a) |
a96c67ec | 5103 | { |
ced3f397 NS |
5104 | gcc_assert (a && AT_class (a) == dw_val_class_str); |
5105 | return a->dw_attr_val.v.val_str->str; | |
9eb4015a JJ |
5106 | } |
5107 | ||
5108 | /* Find out whether a string should be output inline in DIE | |
5109 | or out-of-line in .debug_str section. */ | |
5110 | ||
9eb4015a | 5111 | static int |
7080f735 | 5112 | AT_string_form (dw_attr_ref a) |
9eb4015a | 5113 | { |
ced3f397 NS |
5114 | struct indirect_string_node *node; |
5115 | unsigned int len; | |
5116 | char label[32]; | |
9eb4015a | 5117 | |
ced3f397 | 5118 | gcc_assert (a && AT_class (a) == dw_val_class_str); |
a1c496cb | 5119 | |
ced3f397 NS |
5120 | node = a->dw_attr_val.v.val_str; |
5121 | if (node->form) | |
5122 | return node->form; | |
a1c496cb | 5123 | |
ced3f397 | 5124 | len = strlen (node->str) + 1; |
9eb4015a | 5125 | |
ced3f397 NS |
5126 | /* If the string is shorter or equal to the size of the reference, it is |
5127 | always better to put it inline. */ | |
5128 | if (len <= DWARF_OFFSET_SIZE || node->refcount == 0) | |
5129 | return node->form = DW_FORM_string; | |
9eb4015a | 5130 | |
ced3f397 NS |
5131 | /* If we cannot expect the linker to merge strings in .debug_str |
5132 | section, only put it into .debug_str if it is worth even in this | |
5133 | single module. */ | |
d6b5193b | 5134 | if ((debug_str_section->common.flags & SECTION_MERGE) == 0 |
ced3f397 NS |
5135 | && (len - DWARF_OFFSET_SIZE) * node->refcount <= len) |
5136 | return node->form = DW_FORM_string; | |
2ad9852d | 5137 | |
ced3f397 NS |
5138 | ASM_GENERATE_INTERNAL_LABEL (label, "LASF", dw2_string_counter); |
5139 | ++dw2_string_counter; | |
5140 | node->label = xstrdup (label); | |
a96c67ec | 5141 | |
ced3f397 | 5142 | return node->form = DW_FORM_strp; |
a96c67ec JM |
5143 | } |
5144 | ||
3f76745e | 5145 | /* Add a DIE reference attribute value to a DIE. */ |
71dfc51f | 5146 | |
3f76745e | 5147 | static inline void |
7080f735 | 5148 | add_AT_die_ref (dw_die_ref die, enum dwarf_attribute attr_kind, dw_die_ref targ_die) |
3f76745e | 5149 | { |
1a27722f | 5150 | dw_attr_node attr; |
71dfc51f | 5151 | |
1a27722f GK |
5152 | attr.dw_attr = attr_kind; |
5153 | attr.dw_attr_val.val_class = dw_val_class_die_ref; | |
5154 | attr.dw_attr_val.v.val_die_ref.die = targ_die; | |
5155 | attr.dw_attr_val.v.val_die_ref.external = 0; | |
5156 | add_dwarf_attr (die, &attr); | |
3f76745e | 5157 | } |
b1ccbc24 | 5158 | |
47fcfa7b | 5159 | /* Add an AT_specification attribute to a DIE, and also make the back |
6614fd40 | 5160 | pointer from the specification to the definition. */ |
47fcfa7b SS |
5161 | |
5162 | static inline void | |
5163 | add_AT_specification (dw_die_ref die, dw_die_ref targ_die) | |
5164 | { | |
5165 | add_AT_die_ref (die, DW_AT_specification, targ_die); | |
ced3f397 | 5166 | gcc_assert (!targ_die->die_definition); |
47fcfa7b SS |
5167 | targ_die->die_definition = die; |
5168 | } | |
5169 | ||
a96c67ec | 5170 | static inline dw_die_ref |
7080f735 | 5171 | AT_ref (dw_attr_ref a) |
a96c67ec | 5172 | { |
ced3f397 NS |
5173 | gcc_assert (a && AT_class (a) == dw_val_class_die_ref); |
5174 | return a->dw_attr_val.v.val_die_ref.die; | |
a96c67ec JM |
5175 | } |
5176 | ||
881c6935 | 5177 | static inline int |
7080f735 | 5178 | AT_ref_external (dw_attr_ref a) |
881c6935 JM |
5179 | { |
5180 | if (a && AT_class (a) == dw_val_class_die_ref) | |
5181 | return a->dw_attr_val.v.val_die_ref.external; | |
5182 | ||
5183 | return 0; | |
5184 | } | |
5185 | ||
881c6935 | 5186 | static inline void |
7080f735 | 5187 | set_AT_ref_external (dw_attr_ref a, int i) |
881c6935 | 5188 | { |
ced3f397 NS |
5189 | gcc_assert (a && AT_class (a) == dw_val_class_die_ref); |
5190 | a->dw_attr_val.v.val_die_ref.external = i; | |
881c6935 JM |
5191 | } |
5192 | ||
3f76745e | 5193 | /* Add an FDE reference attribute value to a DIE. */ |
b1ccbc24 | 5194 | |
3f76745e | 5195 | static inline void |
7080f735 | 5196 | add_AT_fde_ref (dw_die_ref die, enum dwarf_attribute attr_kind, unsigned int targ_fde) |
3f76745e | 5197 | { |
1a27722f | 5198 | dw_attr_node attr; |
b1ccbc24 | 5199 | |
1a27722f GK |
5200 | attr.dw_attr = attr_kind; |
5201 | attr.dw_attr_val.val_class = dw_val_class_fde_ref; | |
5202 | attr.dw_attr_val.v.val_fde_index = targ_fde; | |
5203 | add_dwarf_attr (die, &attr); | |
a3f97cbb | 5204 | } |
71dfc51f | 5205 | |
3f76745e | 5206 | /* Add a location description attribute value to a DIE. */ |
71dfc51f | 5207 | |
3f76745e | 5208 | static inline void |
7080f735 | 5209 | add_AT_loc (dw_die_ref die, enum dwarf_attribute attr_kind, dw_loc_descr_ref loc) |
3f76745e | 5210 | { |
1a27722f | 5211 | dw_attr_node attr; |
71dfc51f | 5212 | |
1a27722f GK |
5213 | attr.dw_attr = attr_kind; |
5214 | attr.dw_attr_val.val_class = dw_val_class_loc; | |
5215 | attr.dw_attr_val.v.val_loc = loc; | |
5216 | add_dwarf_attr (die, &attr); | |
a3f97cbb JW |
5217 | } |
5218 | ||
a96c67ec | 5219 | static inline dw_loc_descr_ref |
7080f735 | 5220 | AT_loc (dw_attr_ref a) |
a96c67ec | 5221 | { |
ced3f397 NS |
5222 | gcc_assert (a && AT_class (a) == dw_val_class_loc); |
5223 | return a->dw_attr_val.v.val_loc; | |
a96c67ec JM |
5224 | } |
5225 | ||
63e46568 | 5226 | static inline void |
7080f735 | 5227 | add_AT_loc_list (dw_die_ref die, enum dwarf_attribute attr_kind, dw_loc_list_ref loc_list) |
63e46568 | 5228 | { |
1a27722f | 5229 | dw_attr_node attr; |
63e46568 | 5230 | |
1a27722f GK |
5231 | attr.dw_attr = attr_kind; |
5232 | attr.dw_attr_val.val_class = dw_val_class_loc_list; | |
5233 | attr.dw_attr_val.v.val_loc_list = loc_list; | |
5234 | add_dwarf_attr (die, &attr); | |
1146e682 | 5235 | have_location_lists = true; |
63e46568 DB |
5236 | } |
5237 | ||
63e46568 | 5238 | static inline dw_loc_list_ref |
7080f735 | 5239 | AT_loc_list (dw_attr_ref a) |
63e46568 | 5240 | { |
ced3f397 NS |
5241 | gcc_assert (a && AT_class (a) == dw_val_class_loc_list); |
5242 | return a->dw_attr_val.v.val_loc_list; | |
63e46568 DB |
5243 | } |
5244 | ||
3f76745e | 5245 | /* Add an address constant attribute value to a DIE. */ |
71dfc51f | 5246 | |
3f76745e | 5247 | static inline void |
7080f735 | 5248 | add_AT_addr (dw_die_ref die, enum dwarf_attribute attr_kind, rtx addr) |
a3f97cbb | 5249 | { |
1a27722f | 5250 | dw_attr_node attr; |
71dfc51f | 5251 | |
1a27722f GK |
5252 | attr.dw_attr = attr_kind; |
5253 | attr.dw_attr_val.val_class = dw_val_class_addr; | |
5254 | attr.dw_attr_val.v.val_addr = addr; | |
5255 | add_dwarf_attr (die, &attr); | |
a3f97cbb JW |
5256 | } |
5257 | ||
d5688810 GK |
5258 | /* Get the RTX from to an address DIE attribute. */ |
5259 | ||
1865dbb5 | 5260 | static inline rtx |
7080f735 | 5261 | AT_addr (dw_attr_ref a) |
a96c67ec | 5262 | { |
ced3f397 NS |
5263 | gcc_assert (a && AT_class (a) == dw_val_class_addr); |
5264 | return a->dw_attr_val.v.val_addr; | |
a96c67ec JM |
5265 | } |
5266 | ||
d5688810 GK |
5267 | /* Add a file attribute value to a DIE. */ |
5268 | ||
5269 | static inline void | |
5270 | add_AT_file (dw_die_ref die, enum dwarf_attribute attr_kind, | |
5271 | struct dwarf_file_data *fd) | |
5272 | { | |
5273 | dw_attr_node attr; | |
5274 | ||
5275 | attr.dw_attr = attr_kind; | |
5276 | attr.dw_attr_val.val_class = dw_val_class_file; | |
5277 | attr.dw_attr_val.v.val_file = fd; | |
5278 | add_dwarf_attr (die, &attr); | |
5279 | } | |
5280 | ||
5281 | /* Get the dwarf_file_data from a file DIE attribute. */ | |
5282 | ||
5283 | static inline struct dwarf_file_data * | |
5284 | AT_file (dw_attr_ref a) | |
5285 | { | |
5286 | gcc_assert (a && AT_class (a) == dw_val_class_file); | |
5287 | return a->dw_attr_val.v.val_file; | |
5288 | } | |
5289 | ||
3f76745e | 5290 | /* Add a label identifier attribute value to a DIE. */ |
71dfc51f | 5291 | |
3f76745e | 5292 | static inline void |
7080f735 | 5293 | add_AT_lbl_id (dw_die_ref die, enum dwarf_attribute attr_kind, const char *lbl_id) |
a3f97cbb | 5294 | { |
1a27722f | 5295 | dw_attr_node attr; |
71dfc51f | 5296 | |
1a27722f GK |
5297 | attr.dw_attr = attr_kind; |
5298 | attr.dw_attr_val.val_class = dw_val_class_lbl_id; | |
5299 | attr.dw_attr_val.v.val_lbl_id = xstrdup (lbl_id); | |
5300 | add_dwarf_attr (die, &attr); | |
3f76745e | 5301 | } |
71dfc51f | 5302 | |
192d0f89 GK |
5303 | /* Add a section offset attribute value to a DIE, an offset into the |
5304 | debug_line section. */ | |
3f76745e JM |
5305 | |
5306 | static inline void | |
192d0f89 GK |
5307 | add_AT_lineptr (dw_die_ref die, enum dwarf_attribute attr_kind, |
5308 | const char *label) | |
3f76745e | 5309 | { |
1a27722f | 5310 | dw_attr_node attr; |
71dfc51f | 5311 | |
1a27722f GK |
5312 | attr.dw_attr = attr_kind; |
5313 | attr.dw_attr_val.val_class = dw_val_class_lineptr; | |
5314 | attr.dw_attr_val.v.val_lbl_id = xstrdup (label); | |
5315 | add_dwarf_attr (die, &attr); | |
192d0f89 GK |
5316 | } |
5317 | ||
5318 | /* Add a section offset attribute value to a DIE, an offset into the | |
5319 | debug_macinfo section. */ | |
5320 | ||
5321 | static inline void | |
5322 | add_AT_macptr (dw_die_ref die, enum dwarf_attribute attr_kind, | |
5323 | const char *label) | |
5324 | { | |
1a27722f | 5325 | dw_attr_node attr; |
192d0f89 | 5326 | |
1a27722f GK |
5327 | attr.dw_attr = attr_kind; |
5328 | attr.dw_attr_val.val_class = dw_val_class_macptr; | |
5329 | attr.dw_attr_val.v.val_lbl_id = xstrdup (label); | |
5330 | add_dwarf_attr (die, &attr); | |
a3f97cbb JW |
5331 | } |
5332 | ||
a20612aa RH |
5333 | /* Add an offset attribute value to a DIE. */ |
5334 | ||
2bee6045 | 5335 | static inline void |
799f628a JH |
5336 | add_AT_offset (dw_die_ref die, enum dwarf_attribute attr_kind, |
5337 | unsigned HOST_WIDE_INT offset) | |
a20612aa | 5338 | { |
1a27722f | 5339 | dw_attr_node attr; |
a20612aa | 5340 | |
1a27722f GK |
5341 | attr.dw_attr = attr_kind; |
5342 | attr.dw_attr_val.val_class = dw_val_class_offset; | |
5343 | attr.dw_attr_val.v.val_offset = offset; | |
5344 | add_dwarf_attr (die, &attr); | |
a20612aa RH |
5345 | } |
5346 | ||
2bee6045 JJ |
5347 | /* Add an range_list attribute value to a DIE. */ |
5348 | ||
5349 | static void | |
7080f735 AJ |
5350 | add_AT_range_list (dw_die_ref die, enum dwarf_attribute attr_kind, |
5351 | long unsigned int offset) | |
2bee6045 | 5352 | { |
1a27722f | 5353 | dw_attr_node attr; |
2bee6045 | 5354 | |
1a27722f GK |
5355 | attr.dw_attr = attr_kind; |
5356 | attr.dw_attr_val.val_class = dw_val_class_range_list; | |
5357 | attr.dw_attr_val.v.val_offset = offset; | |
5358 | add_dwarf_attr (die, &attr); | |
2bee6045 JJ |
5359 | } |
5360 | ||
a96c67ec | 5361 | static inline const char * |
7080f735 | 5362 | AT_lbl (dw_attr_ref a) |
a3f97cbb | 5363 | { |
ced3f397 | 5364 | gcc_assert (a && (AT_class (a) == dw_val_class_lbl_id |
192d0f89 GK |
5365 | || AT_class (a) == dw_val_class_lineptr |
5366 | || AT_class (a) == dw_val_class_macptr)); | |
ced3f397 | 5367 | return a->dw_attr_val.v.val_lbl_id; |
a3f97cbb JW |
5368 | } |
5369 | ||
3f76745e | 5370 | /* Get the attribute of type attr_kind. */ |
71dfc51f | 5371 | |
965514bd | 5372 | static dw_attr_ref |
7080f735 | 5373 | get_AT (dw_die_ref die, enum dwarf_attribute attr_kind) |
f37230f0 | 5374 | { |
b3694847 | 5375 | dw_attr_ref a; |
1a27722f | 5376 | unsigned ix; |
b3694847 | 5377 | dw_die_ref spec = NULL; |
556273e0 | 5378 | |
1a27722f GK |
5379 | if (! die) |
5380 | return NULL; | |
71dfc51f | 5381 | |
1a27722f GK |
5382 | for (ix = 0; VEC_iterate (dw_attr_node, die->die_attr, ix, a); ix++) |
5383 | if (a->dw_attr == attr_kind) | |
5384 | return a; | |
5385 | else if (a->dw_attr == DW_AT_specification | |
5386 | || a->dw_attr == DW_AT_abstract_origin) | |
5387 | spec = AT_ref (a); | |
2878ea73 | 5388 | |
1a27722f GK |
5389 | if (spec) |
5390 | return get_AT (spec, attr_kind); | |
3f76745e JM |
5391 | |
5392 | return NULL; | |
f37230f0 JM |
5393 | } |
5394 | ||
2ad9852d RK |
5395 | /* Return the "low pc" attribute value, typically associated with a subprogram |
5396 | DIE. Return null if the "low pc" attribute is either not present, or if it | |
5397 | cannot be represented as an assembler label identifier. */ | |
71dfc51f | 5398 | |
a96c67ec | 5399 | static inline const char * |
7080f735 | 5400 | get_AT_low_pc (dw_die_ref die) |
7e23cb16 | 5401 | { |
b3694847 | 5402 | dw_attr_ref a = get_AT (die, DW_AT_low_pc); |
2ad9852d | 5403 | |
40e8cc95 | 5404 | return a ? AT_lbl (a) : NULL; |
7e23cb16 JM |
5405 | } |
5406 | ||
2ad9852d RK |
5407 | /* Return the "high pc" attribute value, typically associated with a subprogram |
5408 | DIE. Return null if the "high pc" attribute is either not present, or if it | |
5409 | cannot be represented as an assembler label identifier. */ | |
71dfc51f | 5410 | |
a96c67ec | 5411 | static inline const char * |
7080f735 | 5412 | get_AT_hi_pc (dw_die_ref die) |
a3f97cbb | 5413 | { |
b3694847 | 5414 | dw_attr_ref a = get_AT (die, DW_AT_high_pc); |
2ad9852d | 5415 | |
40e8cc95 | 5416 | return a ? AT_lbl (a) : NULL; |
3f76745e JM |
5417 | } |
5418 | ||
5419 | /* Return the value of the string attribute designated by ATTR_KIND, or | |
5420 | NULL if it is not present. */ | |
71dfc51f | 5421 | |
a96c67ec | 5422 | static inline const char * |
7080f735 | 5423 | get_AT_string (dw_die_ref die, enum dwarf_attribute attr_kind) |
3f76745e | 5424 | { |
b3694847 | 5425 | dw_attr_ref a = get_AT (die, attr_kind); |
2ad9852d | 5426 | |
40e8cc95 | 5427 | return a ? AT_string (a) : NULL; |
a3f97cbb JW |
5428 | } |
5429 | ||
3f76745e JM |
5430 | /* Return the value of the flag attribute designated by ATTR_KIND, or -1 |
5431 | if it is not present. */ | |
71dfc51f | 5432 | |
3f76745e | 5433 | static inline int |
7080f735 | 5434 | get_AT_flag (dw_die_ref die, enum dwarf_attribute attr_kind) |
a3f97cbb | 5435 | { |
b3694847 | 5436 | dw_attr_ref a = get_AT (die, attr_kind); |
2ad9852d | 5437 | |
40e8cc95 | 5438 | return a ? AT_flag (a) : 0; |
a3f97cbb JW |
5439 | } |
5440 | ||
3f76745e JM |
5441 | /* Return the value of the unsigned attribute designated by ATTR_KIND, or 0 |
5442 | if it is not present. */ | |
71dfc51f | 5443 | |
3f76745e | 5444 | static inline unsigned |
7080f735 | 5445 | get_AT_unsigned (dw_die_ref die, enum dwarf_attribute attr_kind) |
a3f97cbb | 5446 | { |
b3694847 | 5447 | dw_attr_ref a = get_AT (die, attr_kind); |
2ad9852d | 5448 | |
40e8cc95 | 5449 | return a ? AT_unsigned (a) : 0; |
a96c67ec | 5450 | } |
71dfc51f | 5451 | |
a96c67ec | 5452 | static inline dw_die_ref |
7080f735 | 5453 | get_AT_ref (dw_die_ref die, enum dwarf_attribute attr_kind) |
a96c67ec | 5454 | { |
b3694847 | 5455 | dw_attr_ref a = get_AT (die, attr_kind); |
2ad9852d | 5456 | |
40e8cc95 | 5457 | return a ? AT_ref (a) : NULL; |
3f76745e | 5458 | } |
71dfc51f | 5459 | |
d5688810 GK |
5460 | static inline struct dwarf_file_data * |
5461 | get_AT_file (dw_die_ref die, enum dwarf_attribute attr_kind) | |
5462 | { | |
5463 | dw_attr_ref a = get_AT (die, attr_kind); | |
5464 | ||
5465 | return a ? AT_file (a) : NULL; | |
5466 | } | |
5467 | ||
c3cdeef4 JB |
5468 | /* Return TRUE if the language is C or C++. */ |
5469 | ||
5470 | static inline bool | |
7080f735 | 5471 | is_c_family (void) |
3f76745e | 5472 | { |
c3cdeef4 | 5473 | unsigned int lang = get_AT_unsigned (comp_unit_die, DW_AT_language); |
71dfc51f | 5474 | |
9e51ddaa GK |
5475 | return (lang == DW_LANG_C || lang == DW_LANG_C89 || lang == DW_LANG_ObjC |
5476 | || lang == DW_LANG_C99 | |
5477 | || lang == DW_LANG_C_plus_plus || lang == DW_LANG_ObjC_plus_plus); | |
556273e0 | 5478 | } |
71dfc51f | 5479 | |
c3cdeef4 JB |
5480 | /* Return TRUE if the language is C++. */ |
5481 | ||
5482 | static inline bool | |
7080f735 | 5483 | is_cxx (void) |
1d3d6b1e | 5484 | { |
9e51ddaa | 5485 | unsigned int lang = get_AT_unsigned (comp_unit_die, DW_AT_language); |
2878ea73 | 5486 | |
9e51ddaa | 5487 | return lang == DW_LANG_C_plus_plus || lang == DW_LANG_ObjC_plus_plus; |
c26fbbca | 5488 | } |
1d3d6b1e | 5489 | |
c3cdeef4 JB |
5490 | /* Return TRUE if the language is Fortran. */ |
5491 | ||
5492 | static inline bool | |
7080f735 | 5493 | is_fortran (void) |
3f76745e | 5494 | { |
c3cdeef4 | 5495 | unsigned int lang = get_AT_unsigned (comp_unit_die, DW_AT_language); |
71dfc51f | 5496 | |
6de9cd9a DN |
5497 | return (lang == DW_LANG_Fortran77 |
5498 | || lang == DW_LANG_Fortran90 | |
5499 | || lang == DW_LANG_Fortran95); | |
556273e0 | 5500 | } |
71dfc51f | 5501 | |
c3cdeef4 JB |
5502 | /* Return TRUE if the language is Java. */ |
5503 | ||
5504 | static inline bool | |
7080f735 | 5505 | is_java (void) |
28985b81 | 5506 | { |
c3cdeef4 | 5507 | unsigned int lang = get_AT_unsigned (comp_unit_die, DW_AT_language); |
28985b81 | 5508 | |
c3cdeef4 JB |
5509 | return lang == DW_LANG_Java; |
5510 | } | |
5511 | ||
5512 | /* Return TRUE if the language is Ada. */ | |
5513 | ||
5514 | static inline bool | |
7080f735 | 5515 | is_ada (void) |
c3cdeef4 JB |
5516 | { |
5517 | unsigned int lang = get_AT_unsigned (comp_unit_die, DW_AT_language); | |
7080f735 | 5518 | |
c3cdeef4 | 5519 | return lang == DW_LANG_Ada95 || lang == DW_LANG_Ada83; |
28985b81 AG |
5520 | } |
5521 | ||
10a11b75 JM |
5522 | /* Remove the specified attribute if present. */ |
5523 | ||
5524 | static void | |
7080f735 | 5525 | remove_AT (dw_die_ref die, enum dwarf_attribute attr_kind) |
3f76745e | 5526 | { |
1a27722f GK |
5527 | dw_attr_ref a; |
5528 | unsigned ix; | |
a3f97cbb | 5529 | |
1a27722f GK |
5530 | if (! die) |
5531 | return; | |
71dfc51f | 5532 | |
1a27722f GK |
5533 | for (ix = 0; VEC_iterate (dw_attr_node, die->die_attr, ix, a); ix++) |
5534 | if (a->dw_attr == attr_kind) | |
5535 | { | |
e26303c2 GK |
5536 | if (AT_class (a) == dw_val_class_str) |
5537 | if (a->dw_attr_val.v.val_str->refcount) | |
5538 | a->dw_attr_val.v.val_str->refcount--; | |
5539 | ||
1a27722f GK |
5540 | /* VEC_ordered_remove should help reduce the number of abbrevs |
5541 | that are needed. */ | |
5542 | VEC_ordered_remove (dw_attr_node, die->die_attr, ix); | |
5543 | return; | |
5544 | } | |
10a11b75 | 5545 | } |
71dfc51f | 5546 | |
d6eeb3ba GK |
5547 | /* Remove CHILD from its parent. PREV must have the property that |
5548 | PREV->DIE_SIB == CHILD. Does not alter CHILD. */ | |
6097b0c3 DP |
5549 | |
5550 | static void | |
d6eeb3ba | 5551 | remove_child_with_prev (dw_die_ref child, dw_die_ref prev) |
6097b0c3 | 5552 | { |
d6eeb3ba GK |
5553 | gcc_assert (child->die_parent == prev->die_parent); |
5554 | gcc_assert (prev->die_sib == child); | |
5555 | if (prev == child) | |
6097b0c3 | 5556 | { |
d6eeb3ba GK |
5557 | gcc_assert (child->die_parent->die_child == child); |
5558 | prev = NULL; | |
6097b0c3 | 5559 | } |
d6eeb3ba GK |
5560 | else |
5561 | prev->die_sib = child->die_sib; | |
5562 | if (child->die_parent->die_child == child) | |
5563 | child->die_parent->die_child = prev; | |
6097b0c3 DP |
5564 | } |
5565 | ||
d6eeb3ba GK |
5566 | /* Remove child DIE whose die_tag is TAG. Do nothing if no child |
5567 | matches TAG. */ | |
71dfc51f | 5568 | |
d6eeb3ba GK |
5569 | static void |
5570 | remove_child_TAG (dw_die_ref die, enum dwarf_tag tag) | |
5571 | { | |
5572 | dw_die_ref c; | |
2878ea73 | 5573 | |
d6eeb3ba GK |
5574 | c = die->die_child; |
5575 | if (c) do { | |
5576 | dw_die_ref prev = c; | |
5577 | c = c->die_sib; | |
5578 | while (c->die_tag == tag) | |
5579 | { | |
5580 | remove_child_with_prev (c, prev); | |
5581 | /* Might have removed every child. */ | |
5582 | if (c == c->die_sib) | |
5583 | return; | |
5584 | c = c->die_sib; | |
5585 | } | |
5586 | } while (c != die->die_child); | |
5587 | } | |
5588 | ||
5589 | /* Add a CHILD_DIE as the last child of DIE. */ | |
5590 | ||
5591 | static void | |
7080f735 | 5592 | add_child_die (dw_die_ref die, dw_die_ref child_die) |
3f76745e | 5593 | { |
d6eeb3ba GK |
5594 | /* FIXME this should probably be an assert. */ |
5595 | if (! die || ! child_die) | |
5596 | return; | |
5597 | gcc_assert (die != child_die); | |
2ad9852d | 5598 | |
d6eeb3ba GK |
5599 | child_die->die_parent = die; |
5600 | if (die->die_child) | |
5601 | { | |
5602 | child_die->die_sib = die->die_child->die_sib; | |
5603 | die->die_child->die_sib = child_die; | |
3f76745e | 5604 | } |
d6eeb3ba GK |
5605 | else |
5606 | child_die->die_sib = child_die; | |
5607 | die->die_child = child_die; | |
3f76745e JM |
5608 | } |
5609 | ||
2081603c | 5610 | /* Move CHILD, which must be a child of PARENT or the DIE for which PARENT |
2878ea73 | 5611 | is the specification, to the end of PARENT's list of children. |
d6eeb3ba | 5612 | This is done by removing and re-adding it. */ |
10a11b75 JM |
5613 | |
5614 | static void | |
7080f735 | 5615 | splice_child_die (dw_die_ref parent, dw_die_ref child) |
10a11b75 | 5616 | { |
d6eeb3ba | 5617 | dw_die_ref p; |
10a11b75 JM |
5618 | |
5619 | /* We want the declaration DIE from inside the class, not the | |
5620 | specification DIE at toplevel. */ | |
5621 | if (child->die_parent != parent) | |
2081603c JM |
5622 | { |
5623 | dw_die_ref tmp = get_AT_ref (child, DW_AT_specification); | |
2ad9852d | 5624 | |
2081603c JM |
5625 | if (tmp) |
5626 | child = tmp; | |
5627 | } | |
10a11b75 | 5628 | |
ced3f397 NS |
5629 | gcc_assert (child->die_parent == parent |
5630 | || (child->die_parent | |
5631 | == get_AT_ref (parent, DW_AT_specification))); | |
2878ea73 | 5632 | |
d6eeb3ba GK |
5633 | for (p = child->die_parent->die_child; ; p = p->die_sib) |
5634 | if (p->die_sib == child) | |
10a11b75 | 5635 | { |
d6eeb3ba | 5636 | remove_child_with_prev (child, p); |
10a11b75 JM |
5637 | break; |
5638 | } | |
5639 | ||
d6eeb3ba | 5640 | add_child_die (parent, child); |
10a11b75 JM |
5641 | } |
5642 | ||
3f76745e JM |
5643 | /* Return a pointer to a newly created DIE node. */ |
5644 | ||
5645 | static inline dw_die_ref | |
7080f735 | 5646 | new_die (enum dwarf_tag tag_value, dw_die_ref parent_die, tree t) |
3f76745e | 5647 | { |
703ad42b | 5648 | dw_die_ref die = ggc_alloc_cleared (sizeof (die_node)); |
3f76745e JM |
5649 | |
5650 | die->die_tag = tag_value; | |
3f76745e JM |
5651 | |
5652 | if (parent_die != NULL) | |
5653 | add_child_die (parent_die, die); | |
5654 | else | |
ef76d03b JW |
5655 | { |
5656 | limbo_die_node *limbo_node; | |
5657 | ||
17211ab5 | 5658 | limbo_node = ggc_alloc_cleared (sizeof (limbo_die_node)); |
ef76d03b | 5659 | limbo_node->die = die; |
54ba1f0d | 5660 | limbo_node->created_for = t; |
ef76d03b JW |
5661 | limbo_node->next = limbo_die_list; |
5662 | limbo_die_list = limbo_node; | |
5663 | } | |
71dfc51f | 5664 | |
3f76745e JM |
5665 | return die; |
5666 | } | |
71dfc51f | 5667 | |
3f76745e | 5668 | /* Return the DIE associated with the given type specifier. */ |
71dfc51f | 5669 | |
3f76745e | 5670 | static inline dw_die_ref |
7080f735 | 5671 | lookup_type_die (tree type) |
3f76745e | 5672 | { |
e2500fed | 5673 | return TYPE_SYMTAB_DIE (type); |
3f76745e | 5674 | } |
e90b62db | 5675 | |
3f76745e | 5676 | /* Equate a DIE to a given type specifier. */ |
71dfc51f | 5677 | |
10a11b75 | 5678 | static inline void |
7080f735 | 5679 | equate_type_number_to_die (tree type, dw_die_ref type_die) |
3f76745e | 5680 | { |
e2500fed | 5681 | TYPE_SYMTAB_DIE (type) = type_die; |
3f76745e | 5682 | } |
71dfc51f | 5683 | |
636c7bc4 JZ |
5684 | /* Returns a hash value for X (which really is a die_struct). */ |
5685 | ||
5686 | static hashval_t | |
5687 | decl_die_table_hash (const void *x) | |
5688 | { | |
5f754896 | 5689 | return (hashval_t) ((const_dw_die_ref) x)->decl_id; |
636c7bc4 JZ |
5690 | } |
5691 | ||
5692 | /* Return nonzero if decl_id of die_struct X is the same as UID of decl *Y. */ | |
5693 | ||
5694 | static int | |
5695 | decl_die_table_eq (const void *x, const void *y) | |
5696 | { | |
5f754896 | 5697 | return (((const_dw_die_ref) x)->decl_id == DECL_UID ((const tree) y)); |
636c7bc4 JZ |
5698 | } |
5699 | ||
3f76745e | 5700 | /* Return the DIE associated with a given declaration. */ |
71dfc51f | 5701 | |
3f76745e | 5702 | static inline dw_die_ref |
7080f735 | 5703 | lookup_decl_die (tree decl) |
3f76745e | 5704 | { |
636c7bc4 | 5705 | return htab_find_with_hash (decl_die_table, decl, DECL_UID (decl)); |
a3f97cbb JW |
5706 | } |
5707 | ||
0a2d3d69 DB |
5708 | /* Returns a hash value for X (which really is a var_loc_list). */ |
5709 | ||
5710 | static hashval_t | |
5711 | decl_loc_table_hash (const void *x) | |
5712 | { | |
5713 | return (hashval_t) ((const var_loc_list *) x)->decl_id; | |
5714 | } | |
5715 | ||
5716 | /* Return nonzero if decl_id of var_loc_list X is the same as | |
5717 | UID of decl *Y. */ | |
5718 | ||
5719 | static int | |
5720 | decl_loc_table_eq (const void *x, const void *y) | |
5721 | { | |
5722 | return (((const var_loc_list *) x)->decl_id == DECL_UID ((const tree) y)); | |
5723 | } | |
5724 | ||
5725 | /* Return the var_loc list associated with a given declaration. */ | |
5726 | ||
5727 | static inline var_loc_list * | |
5728 | lookup_decl_loc (tree decl) | |
5729 | { | |
5730 | return htab_find_with_hash (decl_loc_table, decl, DECL_UID (decl)); | |
5731 | } | |
5732 | ||
3f76745e | 5733 | /* Equate a DIE to a particular declaration. */ |
71dfc51f | 5734 | |
3f76745e | 5735 | static void |
7080f735 | 5736 | equate_decl_number_to_die (tree decl, dw_die_ref decl_die) |
a3f97cbb | 5737 | { |
aea9695c | 5738 | unsigned int decl_id = DECL_UID (decl); |
636c7bc4 | 5739 | void **slot; |
3f76745e | 5740 | |
636c7bc4 JZ |
5741 | slot = htab_find_slot_with_hash (decl_die_table, decl, decl_id, INSERT); |
5742 | *slot = decl_die; | |
5743 | decl_die->decl_id = decl_id; | |
a3f97cbb | 5744 | } |
0a2d3d69 DB |
5745 | |
5746 | /* Add a variable location node to the linked list for DECL. */ | |
5747 | ||
5748 | static void | |
5749 | add_var_loc_to_decl (tree decl, struct var_loc_node *loc) | |
5750 | { | |
5751 | unsigned int decl_id = DECL_UID (decl); | |
5752 | var_loc_list *temp; | |
5753 | void **slot; | |
5754 | ||
5755 | slot = htab_find_slot_with_hash (decl_loc_table, decl, decl_id, INSERT); | |
5756 | if (*slot == NULL) | |
5757 | { | |
5758 | temp = ggc_alloc_cleared (sizeof (var_loc_list)); | |
5759 | temp->decl_id = decl_id; | |
5760 | *slot = temp; | |
5761 | } | |
5762 | else | |
5763 | temp = *slot; | |
5764 | ||
5765 | if (temp->last) | |
5766 | { | |
5767 | /* If the current location is the same as the end of the list, | |
62760ffd | 5768 | and either both or neither of the locations is uninitialized, |
0a2d3d69 | 5769 | we have nothing to do. */ |
62760ffd CT |
5770 | if ((!rtx_equal_p (NOTE_VAR_LOCATION_LOC (temp->last->var_loc_note), |
5771 | NOTE_VAR_LOCATION_LOC (loc->var_loc_note))) | |
5772 | || ((NOTE_VAR_LOCATION_STATUS (temp->last->var_loc_note) | |
5773 | != NOTE_VAR_LOCATION_STATUS (loc->var_loc_note)) | |
5774 | && ((NOTE_VAR_LOCATION_STATUS (temp->last->var_loc_note) | |
5775 | == VAR_INIT_STATUS_UNINITIALIZED) | |
5776 | || (NOTE_VAR_LOCATION_STATUS (loc->var_loc_note) | |
5777 | == VAR_INIT_STATUS_UNINITIALIZED)))) | |
0a2d3d69 DB |
5778 | { |
5779 | /* Add LOC to the end of list and update LAST. */ | |
5780 | temp->last->next = loc; | |
5781 | temp->last = loc; | |
5782 | } | |
5783 | } | |
5784 | /* Do not add empty location to the beginning of the list. */ | |
5785 | else if (NOTE_VAR_LOCATION_LOC (loc->var_loc_note) != NULL_RTX) | |
5786 | { | |
5787 | temp->first = loc; | |
5788 | temp->last = loc; | |
5789 | } | |
5790 | } | |
3f76745e JM |
5791 | \f |
5792 | /* Keep track of the number of spaces used to indent the | |
5793 | output of the debugging routines that print the structure of | |
5794 | the DIE internal representation. */ | |
5795 | static int print_indent; | |
71dfc51f | 5796 | |
3f76745e JM |
5797 | /* Indent the line the number of spaces given by print_indent. */ |
5798 | ||
5799 | static inline void | |
7080f735 | 5800 | print_spaces (FILE *outfile) |
3f76745e JM |
5801 | { |
5802 | fprintf (outfile, "%*s", print_indent, ""); | |
a3f97cbb JW |
5803 | } |
5804 | ||
956d6950 | 5805 | /* Print the information associated with a given DIE, and its children. |
3f76745e | 5806 | This routine is a debugging aid only. */ |
71dfc51f | 5807 | |
a3f97cbb | 5808 | static void |
7080f735 | 5809 | print_die (dw_die_ref die, FILE *outfile) |
a3f97cbb | 5810 | { |
b3694847 SS |
5811 | dw_attr_ref a; |
5812 | dw_die_ref c; | |
1a27722f | 5813 | unsigned ix; |
71dfc51f | 5814 | |
3f76745e | 5815 | print_spaces (outfile); |
8d5b1b67 | 5816 | fprintf (outfile, "DIE %4ld: %s\n", |
3f76745e JM |
5817 | die->die_offset, dwarf_tag_name (die->die_tag)); |
5818 | print_spaces (outfile); | |
2d8b0f3a | 5819 | fprintf (outfile, " abbrev id: %lu", die->die_abbrev); |
8d5b1b67 | 5820 | fprintf (outfile, " offset: %ld\n", die->die_offset); |
3f76745e | 5821 | |
1a27722f | 5822 | for (ix = 0; VEC_iterate (dw_attr_node, die->die_attr, ix, a); ix++) |
a3f97cbb | 5823 | { |
3f76745e JM |
5824 | print_spaces (outfile); |
5825 | fprintf (outfile, " %s: ", dwarf_attr_name (a->dw_attr)); | |
5826 | ||
a96c67ec | 5827 | switch (AT_class (a)) |
3f76745e JM |
5828 | { |
5829 | case dw_val_class_addr: | |
5830 | fprintf (outfile, "address"); | |
5831 | break; | |
a20612aa RH |
5832 | case dw_val_class_offset: |
5833 | fprintf (outfile, "offset"); | |
5834 | break; | |
3f76745e JM |
5835 | case dw_val_class_loc: |
5836 | fprintf (outfile, "location descriptor"); | |
5837 | break; | |
63e46568 | 5838 | case dw_val_class_loc_list: |
a20612aa RH |
5839 | fprintf (outfile, "location list -> label:%s", |
5840 | AT_loc_list (a)->ll_symbol); | |
63e46568 | 5841 | break; |
2bee6045 JJ |
5842 | case dw_val_class_range_list: |
5843 | fprintf (outfile, "range list"); | |
5844 | break; | |
3f76745e | 5845 | case dw_val_class_const: |
38f9cd4c | 5846 | fprintf (outfile, HOST_WIDE_INT_PRINT_DEC, AT_int (a)); |
3f76745e JM |
5847 | break; |
5848 | case dw_val_class_unsigned_const: | |
38f9cd4c | 5849 | fprintf (outfile, HOST_WIDE_INT_PRINT_UNSIGNED, AT_unsigned (a)); |
3f76745e JM |
5850 | break; |
5851 | case dw_val_class_long_long: | |
2d8b0f3a | 5852 | fprintf (outfile, "constant (%lu,%lu)", |
556273e0 KH |
5853 | a->dw_attr_val.v.val_long_long.hi, |
5854 | a->dw_attr_val.v.val_long_long.low); | |
3f76745e | 5855 | break; |
e7ee3914 AM |
5856 | case dw_val_class_vec: |
5857 | fprintf (outfile, "floating-point or vector constant"); | |
3f76745e JM |
5858 | break; |
5859 | case dw_val_class_flag: | |
a96c67ec | 5860 | fprintf (outfile, "%u", AT_flag (a)); |
3f76745e JM |
5861 | break; |
5862 | case dw_val_class_die_ref: | |
a96c67ec | 5863 | if (AT_ref (a) != NULL) |
881c6935 | 5864 | { |
1bfb5f8f | 5865 | if (AT_ref (a)->die_symbol) |
881c6935 JM |
5866 | fprintf (outfile, "die -> label: %s", AT_ref (a)->die_symbol); |
5867 | else | |
8d5b1b67 | 5868 | fprintf (outfile, "die -> %ld", AT_ref (a)->die_offset); |
881c6935 | 5869 | } |
3f76745e JM |
5870 | else |
5871 | fprintf (outfile, "die -> <null>"); | |
5872 | break; | |
5873 | case dw_val_class_lbl_id: | |
192d0f89 GK |
5874 | case dw_val_class_lineptr: |
5875 | case dw_val_class_macptr: | |
a96c67ec | 5876 | fprintf (outfile, "label: %s", AT_lbl (a)); |
3f76745e | 5877 | break; |
3f76745e | 5878 | case dw_val_class_str: |
a96c67ec JM |
5879 | if (AT_string (a) != NULL) |
5880 | fprintf (outfile, "\"%s\"", AT_string (a)); | |
3f76745e JM |
5881 | else |
5882 | fprintf (outfile, "<null>"); | |
5883 | break; | |
d5688810 GK |
5884 | case dw_val_class_file: |
5885 | fprintf (outfile, "\"%s\" (%d)", AT_file (a)->filename, | |
5886 | AT_file (a)->emitted_number); | |
5887 | break; | |
e9a25f70 JL |
5888 | default: |
5889 | break; | |
3f76745e JM |
5890 | } |
5891 | ||
5892 | fprintf (outfile, "\n"); | |
5893 | } | |
5894 | ||
5895 | if (die->die_child != NULL) | |
5896 | { | |
5897 | print_indent += 4; | |
d6eeb3ba | 5898 | FOR_EACH_CHILD (die, c, print_die (c, outfile)); |
3f76745e | 5899 | print_indent -= 4; |
a3f97cbb | 5900 | } |
881c6935 JM |
5901 | if (print_indent == 0) |
5902 | fprintf (outfile, "\n"); | |
a3f97cbb JW |
5903 | } |
5904 | ||
3f76745e JM |
5905 | /* Print the contents of the source code line number correspondence table. |
5906 | This routine is a debugging aid only. */ | |
71dfc51f | 5907 | |
3f76745e | 5908 | static void |
7080f735 | 5909 | print_dwarf_line_table (FILE *outfile) |
a3f97cbb | 5910 | { |
b3694847 SS |
5911 | unsigned i; |
5912 | dw_line_info_ref line_info; | |
3f76745e JM |
5913 | |
5914 | fprintf (outfile, "\n\nDWARF source line information\n"); | |
2ad9852d | 5915 | for (i = 1; i < line_info_table_in_use; i++) |
a3f97cbb | 5916 | { |
3f76745e | 5917 | line_info = &line_info_table[i]; |
d5688810 GK |
5918 | fprintf (outfile, "%5d: %4ld %6ld\n", i, |
5919 | line_info->dw_file_num, | |
5920 | line_info->dw_line_num); | |
a3f97cbb | 5921 | } |
3f76745e JM |
5922 | |
5923 | fprintf (outfile, "\n\n"); | |
f37230f0 JM |
5924 | } |
5925 | ||
3f76745e JM |
5926 | /* Print the information collected for a given DIE. */ |
5927 | ||
5928 | void | |
7080f735 | 5929 | debug_dwarf_die (dw_die_ref die) |
3f76745e JM |
5930 | { |
5931 | print_die (die, stderr); | |
5932 | } | |
5933 | ||
5934 | /* Print all DWARF information collected for the compilation unit. | |
5935 | This routine is a debugging aid only. */ | |
5936 | ||
5937 | void | |
7080f735 | 5938 | debug_dwarf (void) |
3f76745e JM |
5939 | { |
5940 | print_indent = 0; | |
5941 | print_die (comp_unit_die, stderr); | |
b2244e22 JW |
5942 | if (! DWARF2_ASM_LINE_DEBUG_INFO) |
5943 | print_dwarf_line_table (stderr); | |
3f76745e JM |
5944 | } |
5945 | \f | |
2ad9852d RK |
5946 | /* Start a new compilation unit DIE for an include file. OLD_UNIT is the CU |
5947 | for the enclosing include file, if any. BINCL_DIE is the DW_TAG_GNU_BINCL | |
5948 | DIE that marks the start of the DIEs for this include file. */ | |
881c6935 JM |
5949 | |
5950 | static dw_die_ref | |
7080f735 | 5951 | push_new_compile_unit (dw_die_ref old_unit, dw_die_ref bincl_die) |
881c6935 JM |
5952 | { |
5953 | const char *filename = get_AT_string (bincl_die, DW_AT_name); | |
5954 | dw_die_ref new_unit = gen_compile_unit_die (filename); | |
2ad9852d | 5955 | |
881c6935 JM |
5956 | new_unit->die_sib = old_unit; |
5957 | return new_unit; | |
5958 | } | |
5959 | ||
5960 | /* Close an include-file CU and reopen the enclosing one. */ | |
5961 | ||
5962 | static dw_die_ref | |
7080f735 | 5963 | pop_compile_unit (dw_die_ref old_unit) |
881c6935 JM |
5964 | { |
5965 | dw_die_ref new_unit = old_unit->die_sib; | |
2ad9852d | 5966 | |
881c6935 JM |
5967 | old_unit->die_sib = NULL; |
5968 | return new_unit; | |
5969 | } | |
5970 | ||
2ad9852d RK |
5971 | #define CHECKSUM(FOO) md5_process_bytes (&(FOO), sizeof (FOO), ctx) |
5972 | #define CHECKSUM_STRING(FOO) md5_process_bytes ((FOO), strlen (FOO), ctx) | |
881c6935 JM |
5973 | |
5974 | /* Calculate the checksum of a location expression. */ | |
5975 | ||
5976 | static inline void | |
7080f735 | 5977 | loc_checksum (dw_loc_descr_ref loc, struct md5_ctx *ctx) |
881c6935 | 5978 | { |
2ad9852d RK |
5979 | CHECKSUM (loc->dw_loc_opc); |
5980 | CHECKSUM (loc->dw_loc_oprnd1); | |
5981 | CHECKSUM (loc->dw_loc_oprnd2); | |
881c6935 JM |
5982 | } |
5983 | ||
5984 | /* Calculate the checksum of an attribute. */ | |
5985 | ||
5986 | static void | |
7080f735 | 5987 | attr_checksum (dw_attr_ref at, struct md5_ctx *ctx, int *mark) |
881c6935 JM |
5988 | { |
5989 | dw_loc_descr_ref loc; | |
5990 | rtx r; | |
5991 | ||
2ad9852d | 5992 | CHECKSUM (at->dw_attr); |
881c6935 | 5993 | |
d5688810 GK |
5994 | /* We don't care that this was compiled with a different compiler |
5995 | snapshot; if the output is the same, that's what matters. */ | |
5996 | if (at->dw_attr == DW_AT_producer) | |
881c6935 JM |
5997 | return; |
5998 | ||
5999 | switch (AT_class (at)) | |
6000 | { | |
6001 | case dw_val_class_const: | |
2ad9852d | 6002 | CHECKSUM (at->dw_attr_val.v.val_int); |
881c6935 JM |
6003 | break; |
6004 | case dw_val_class_unsigned_const: | |
2ad9852d | 6005 | CHECKSUM (at->dw_attr_val.v.val_unsigned); |
881c6935 JM |
6006 | break; |
6007 | case dw_val_class_long_long: | |
2ad9852d | 6008 | CHECKSUM (at->dw_attr_val.v.val_long_long); |
881c6935 | 6009 | break; |
e7ee3914 AM |
6010 | case dw_val_class_vec: |
6011 | CHECKSUM (at->dw_attr_val.v.val_vec); | |
881c6935 JM |
6012 | break; |
6013 | case dw_val_class_flag: | |
2ad9852d | 6014 | CHECKSUM (at->dw_attr_val.v.val_flag); |
881c6935 | 6015 | break; |
881c6935 | 6016 | case dw_val_class_str: |
2ad9852d | 6017 | CHECKSUM_STRING (AT_string (at)); |
881c6935 | 6018 | break; |
a20612aa | 6019 | |
881c6935 JM |
6020 | case dw_val_class_addr: |
6021 | r = AT_addr (at); | |
ced3f397 NS |
6022 | gcc_assert (GET_CODE (r) == SYMBOL_REF); |
6023 | CHECKSUM_STRING (XSTR (r, 0)); | |
881c6935 JM |
6024 | break; |
6025 | ||
a20612aa | 6026 | case dw_val_class_offset: |
2ad9852d | 6027 | CHECKSUM (at->dw_attr_val.v.val_offset); |
a20612aa RH |
6028 | break; |
6029 | ||
881c6935 JM |
6030 | case dw_val_class_loc: |
6031 | for (loc = AT_loc (at); loc; loc = loc->dw_loc_next) | |
6032 | loc_checksum (loc, ctx); | |
6033 | break; | |
6034 | ||
6035 | case dw_val_class_die_ref: | |
cc0017a9 ZD |
6036 | die_checksum (AT_ref (at), ctx, mark); |
6037 | break; | |
881c6935 JM |
6038 | |
6039 | case dw_val_class_fde_ref: | |
6040 | case dw_val_class_lbl_id: | |
192d0f89 GK |
6041 | case dw_val_class_lineptr: |
6042 | case dw_val_class_macptr: | |
a20612aa | 6043 | break; |
881c6935 | 6044 | |
d5688810 GK |
6045 | case dw_val_class_file: |
6046 | CHECKSUM_STRING (AT_file (at)->filename); | |
6047 | break; | |
6048 | ||
881c6935 JM |
6049 | default: |
6050 | break; | |
6051 | } | |
6052 | } | |
6053 | ||
6054 | /* Calculate the checksum of a DIE. */ | |
6055 | ||
6056 | static void | |
7080f735 | 6057 | die_checksum (dw_die_ref die, struct md5_ctx *ctx, int *mark) |
881c6935 JM |
6058 | { |
6059 | dw_die_ref c; | |
6060 | dw_attr_ref a; | |
1a27722f | 6061 | unsigned ix; |
881c6935 | 6062 | |
cc0017a9 ZD |
6063 | /* To avoid infinite recursion. */ |
6064 | if (die->die_mark) | |
6065 | { | |
6066 | CHECKSUM (die->die_mark); | |
6067 | return; | |
6068 | } | |
6069 | die->die_mark = ++(*mark); | |
6070 | ||
2ad9852d | 6071 | CHECKSUM (die->die_tag); |
881c6935 | 6072 | |
1a27722f | 6073 | for (ix = 0; VEC_iterate (dw_attr_node, die->die_attr, ix, a); ix++) |
cc0017a9 | 6074 | attr_checksum (a, ctx, mark); |
881c6935 | 6075 | |
d6eeb3ba | 6076 | FOR_EACH_CHILD (die, c, die_checksum (c, ctx, mark)); |
881c6935 JM |
6077 | } |
6078 | ||
2ad9852d RK |
6079 | #undef CHECKSUM |
6080 | #undef CHECKSUM_STRING | |
881c6935 | 6081 | |
cc0017a9 ZD |
6082 | /* Do the location expressions look same? */ |
6083 | static inline int | |
7080f735 | 6084 | same_loc_p (dw_loc_descr_ref loc1, dw_loc_descr_ref loc2, int *mark) |
cc0017a9 ZD |
6085 | { |
6086 | return loc1->dw_loc_opc == loc2->dw_loc_opc | |
6087 | && same_dw_val_p (&loc1->dw_loc_oprnd1, &loc2->dw_loc_oprnd1, mark) | |
6088 | && same_dw_val_p (&loc1->dw_loc_oprnd2, &loc2->dw_loc_oprnd2, mark); | |
6089 | } | |
6090 | ||
6091 | /* Do the values look the same? */ | |
6092 | static int | |
7080f735 | 6093 | same_dw_val_p (dw_val_node *v1, dw_val_node *v2, int *mark) |
cc0017a9 ZD |
6094 | { |
6095 | dw_loc_descr_ref loc1, loc2; | |
6096 | rtx r1, r2; | |
cc0017a9 ZD |
6097 | |
6098 | if (v1->val_class != v2->val_class) | |
6099 | return 0; | |
6100 | ||
6101 | switch (v1->val_class) | |
6102 | { | |
6103 | case dw_val_class_const: | |
6104 | return v1->v.val_int == v2->v.val_int; | |
6105 | case dw_val_class_unsigned_const: | |
6106 | return v1->v.val_unsigned == v2->v.val_unsigned; | |
6107 | case dw_val_class_long_long: | |
6108 | return v1->v.val_long_long.hi == v2->v.val_long_long.hi | |
73c68f61 | 6109 | && v1->v.val_long_long.low == v2->v.val_long_long.low; |
e7ee3914 AM |
6110 | case dw_val_class_vec: |
6111 | if (v1->v.val_vec.length != v2->v.val_vec.length | |
6112 | || v1->v.val_vec.elt_size != v2->v.val_vec.elt_size) | |
6113 | return 0; | |
6114 | if (memcmp (v1->v.val_vec.array, v2->v.val_vec.array, | |
6115 | v1->v.val_vec.length * v1->v.val_vec.elt_size)) | |
cc0017a9 | 6116 | return 0; |
cc0017a9 ZD |
6117 | return 1; |
6118 | case dw_val_class_flag: | |
6119 | return v1->v.val_flag == v2->v.val_flag; | |
6120 | case dw_val_class_str: | |
17211ab5 | 6121 | return !strcmp(v1->v.val_str->str, v2->v.val_str->str); |
cc0017a9 ZD |
6122 | |
6123 | case dw_val_class_addr: | |
6124 | r1 = v1->v.val_addr; | |
6125 | r2 = v2->v.val_addr; | |
6126 | if (GET_CODE (r1) != GET_CODE (r2)) | |
6127 | return 0; | |
ced3f397 NS |
6128 | gcc_assert (GET_CODE (r1) == SYMBOL_REF); |
6129 | return !strcmp (XSTR (r1, 0), XSTR (r2, 0)); | |
cc0017a9 ZD |
6130 | |
6131 | case dw_val_class_offset: | |
6132 | return v1->v.val_offset == v2->v.val_offset; | |
6133 | ||
6134 | case dw_val_class_loc: | |
6135 | for (loc1 = v1->v.val_loc, loc2 = v2->v.val_loc; | |
6136 | loc1 && loc2; | |
6137 | loc1 = loc1->dw_loc_next, loc2 = loc2->dw_loc_next) | |
6138 | if (!same_loc_p (loc1, loc2, mark)) | |
6139 | return 0; | |
6140 | return !loc1 && !loc2; | |
6141 | ||
6142 | case dw_val_class_die_ref: | |
6143 | return same_die_p (v1->v.val_die_ref.die, v2->v.val_die_ref.die, mark); | |
6144 | ||
6145 | case dw_val_class_fde_ref: | |
6146 | case dw_val_class_lbl_id: | |
192d0f89 GK |
6147 | case dw_val_class_lineptr: |
6148 | case dw_val_class_macptr: | |
cc0017a9 ZD |
6149 | return 1; |
6150 | ||
d5688810 GK |
6151 | case dw_val_class_file: |
6152 | return v1->v.val_file == v2->v.val_file; | |
6153 | ||
cc0017a9 ZD |
6154 | default: |
6155 | return 1; | |
6156 | } | |
6157 | } | |
6158 | ||
6159 | /* Do the attributes look the same? */ | |
6160 | ||
6161 | static int | |
7080f735 | 6162 | same_attr_p (dw_attr_ref at1, dw_attr_ref at2, int *mark) |
cc0017a9 ZD |
6163 | { |
6164 | if (at1->dw_attr != at2->dw_attr) | |
6165 | return 0; | |
6166 | ||
d5688810 GK |
6167 | /* We don't care that this was compiled with a different compiler |
6168 | snapshot; if the output is the same, that's what matters. */ | |
6169 | if (at1->dw_attr == DW_AT_producer) | |
cc0017a9 ZD |
6170 | return 1; |
6171 | ||
6172 | return same_dw_val_p (&at1->dw_attr_val, &at2->dw_attr_val, mark); | |
6173 | } | |
6174 | ||
6175 | /* Do the dies look the same? */ | |
6176 | ||
6177 | static int | |
7080f735 | 6178 | same_die_p (dw_die_ref die1, dw_die_ref die2, int *mark) |
cc0017a9 ZD |
6179 | { |
6180 | dw_die_ref c1, c2; | |
1a27722f GK |
6181 | dw_attr_ref a1; |
6182 | unsigned ix; | |
cc0017a9 ZD |
6183 | |
6184 | /* To avoid infinite recursion. */ | |
6185 | if (die1->die_mark) | |
6186 | return die1->die_mark == die2->die_mark; | |
6187 | die1->die_mark = die2->die_mark = ++(*mark); | |
6188 | ||
6189 | if (die1->die_tag != die2->die_tag) | |
6190 | return 0; | |
6191 | ||
1a27722f GK |
6192 | if (VEC_length (dw_attr_node, die1->die_attr) |
6193 | != VEC_length (dw_attr_node, die2->die_attr)) | |
cc0017a9 | 6194 | return 0; |
2878ea73 | 6195 | |
1a27722f GK |
6196 | for (ix = 0; VEC_iterate (dw_attr_node, die1->die_attr, ix, a1); ix++) |
6197 | if (!same_attr_p (a1, VEC_index (dw_attr_node, die2->die_attr, ix), mark)) | |
6198 | return 0; | |
cc0017a9 | 6199 | |
d6eeb3ba GK |
6200 | c1 = die1->die_child; |
6201 | c2 = die2->die_child; | |
6202 | if (! c1) | |
6203 | { | |
6204 | if (c2) | |
6205 | return 0; | |
6206 | } | |
6207 | else | |
6208 | for (;;) | |
6209 | { | |
6210 | if (!same_die_p (c1, c2, mark)) | |
6211 | return 0; | |
6212 | c1 = c1->die_sib; | |
6213 | c2 = c2->die_sib; | |
6214 | if (c1 == die1->die_child) | |
6215 | { | |
6216 | if (c2 == die2->die_child) | |
6217 | break; | |
6218 | else | |
6219 | return 0; | |
6220 | } | |
6221 | } | |
cc0017a9 ZD |
6222 | |
6223 | return 1; | |
6224 | } | |
6225 | ||
6226 | /* Do the dies look the same? Wrapper around same_die_p. */ | |
6227 | ||
6228 | static int | |
7080f735 | 6229 | same_die_p_wrap (dw_die_ref die1, dw_die_ref die2) |
cc0017a9 ZD |
6230 | { |
6231 | int mark = 0; | |
6232 | int ret = same_die_p (die1, die2, &mark); | |
6233 | ||
6234 | unmark_all_dies (die1); | |
6235 | unmark_all_dies (die2); | |
6236 | ||
6237 | return ret; | |
6238 | } | |
6239 | ||
881c6935 JM |
6240 | /* The prefix to attach to symbols on DIEs in the current comdat debug |
6241 | info section. */ | |
6242 | static char *comdat_symbol_id; | |
6243 | ||
6244 | /* The index of the current symbol within the current comdat CU. */ | |
6245 | static unsigned int comdat_symbol_number; | |
6246 | ||
6247 | /* Calculate the MD5 checksum of the compilation unit DIE UNIT_DIE and its | |
6248 | children, and set comdat_symbol_id accordingly. */ | |
6249 | ||
6250 | static void | |
7080f735 | 6251 | compute_section_prefix (dw_die_ref unit_die) |
881c6935 | 6252 | { |
cc0017a9 ZD |
6253 | const char *die_name = get_AT_string (unit_die, DW_AT_name); |
6254 | const char *base = die_name ? lbasename (die_name) : "anonymous"; | |
703ad42b | 6255 | char *name = alloca (strlen (base) + 64); |
f11c3043 | 6256 | char *p; |
cc0017a9 | 6257 | int i, mark; |
881c6935 JM |
6258 | unsigned char checksum[16]; |
6259 | struct md5_ctx ctx; | |
6260 | ||
f11c3043 RK |
6261 | /* Compute the checksum of the DIE, then append part of it as hex digits to |
6262 | the name filename of the unit. */ | |
6263 | ||
881c6935 | 6264 | md5_init_ctx (&ctx); |
cc0017a9 ZD |
6265 | mark = 0; |
6266 | die_checksum (unit_die, &ctx, &mark); | |
6267 | unmark_all_dies (unit_die); | |
881c6935 JM |
6268 | md5_finish_ctx (&ctx, checksum); |
6269 | ||
0023400b | 6270 | sprintf (name, "%s.", base); |
881c6935 JM |
6271 | clean_symbol_name (name); |
6272 | ||
2ad9852d RK |
6273 | p = name + strlen (name); |
6274 | for (i = 0; i < 4; i++) | |
6275 | { | |
6276 | sprintf (p, "%.2x", checksum[i]); | |
6277 | p += 2; | |
6278 | } | |
881c6935 JM |
6279 | |
6280 | comdat_symbol_id = unit_die->die_symbol = xstrdup (name); | |
6281 | comdat_symbol_number = 0; | |
6282 | } | |
6283 | ||
f11c3043 | 6284 | /* Returns nonzero if DIE represents a type, in the sense of TYPE_P. */ |
881c6935 JM |
6285 | |
6286 | static int | |
7080f735 | 6287 | is_type_die (dw_die_ref die) |
881c6935 JM |
6288 | { |
6289 | switch (die->die_tag) | |
6290 | { | |
6291 | case DW_TAG_array_type: | |
6292 | case DW_TAG_class_type: | |
6293 | case DW_TAG_enumeration_type: | |
6294 | case DW_TAG_pointer_type: | |
6295 | case DW_TAG_reference_type: | |
6296 | case DW_TAG_string_type: | |
6297 | case DW_TAG_structure_type: | |
6298 | case DW_TAG_subroutine_type: | |
6299 | case DW_TAG_union_type: | |
6300 | case DW_TAG_ptr_to_member_type: | |
6301 | case DW_TAG_set_type: | |
6302 | case DW_TAG_subrange_type: | |
6303 | case DW_TAG_base_type: | |
6304 | case DW_TAG_const_type: | |
6305 | case DW_TAG_file_type: | |
6306 | case DW_TAG_packed_type: | |
6307 | case DW_TAG_volatile_type: | |
cc0017a9 | 6308 | case DW_TAG_typedef: |
881c6935 JM |
6309 | return 1; |
6310 | default: | |
6311 | return 0; | |
6312 | } | |
6313 | } | |
6314 | ||
6315 | /* Returns 1 iff C is the sort of DIE that should go into a COMDAT CU. | |
6316 | Basically, we want to choose the bits that are likely to be shared between | |
6317 | compilations (types) and leave out the bits that are specific to individual | |
6318 | compilations (functions). */ | |
6319 | ||
6320 | static int | |
7080f735 | 6321 | is_comdat_die (dw_die_ref c) |
881c6935 | 6322 | { |
2ad9852d RK |
6323 | /* I think we want to leave base types and __vtbl_ptr_type in the main CU, as |
6324 | we do for stabs. The advantage is a greater likelihood of sharing between | |
6325 | objects that don't include headers in the same order (and therefore would | |
6326 | put the base types in a different comdat). jason 8/28/00 */ | |
6327 | ||
881c6935 JM |
6328 | if (c->die_tag == DW_TAG_base_type) |
6329 | return 0; | |
6330 | ||
6331 | if (c->die_tag == DW_TAG_pointer_type | |
6332 | || c->die_tag == DW_TAG_reference_type | |
6333 | || c->die_tag == DW_TAG_const_type | |
6334 | || c->die_tag == DW_TAG_volatile_type) | |
6335 | { | |
6336 | dw_die_ref t = get_AT_ref (c, DW_AT_type); | |
2ad9852d | 6337 | |
881c6935 JM |
6338 | return t ? is_comdat_die (t) : 0; |
6339 | } | |
881c6935 JM |
6340 | |
6341 | return is_type_die (c); | |
6342 | } | |
6343 | ||
6344 | /* Returns 1 iff C is the sort of DIE that might be referred to from another | |
6345 | compilation unit. */ | |
6346 | ||
6347 | static int | |
7080f735 | 6348 | is_symbol_die (dw_die_ref c) |
881c6935 | 6349 | { |
2ad9852d | 6350 | return (is_type_die (c) |
c26fbbca | 6351 | || (get_AT (c, DW_AT_declaration) |
ef85ac9a JJ |
6352 | && !get_AT (c, DW_AT_specification)) |
6353 | || c->die_tag == DW_TAG_namespace); | |
881c6935 JM |
6354 | } |
6355 | ||
6356 | static char * | |
7080f735 | 6357 | gen_internal_sym (const char *prefix) |
881c6935 JM |
6358 | { |
6359 | char buf[256]; | |
2ad9852d | 6360 | |
63e46568 | 6361 | ASM_GENERATE_INTERNAL_LABEL (buf, prefix, label_num++); |
881c6935 JM |
6362 | return xstrdup (buf); |
6363 | } | |
6364 | ||
6365 | /* Assign symbols to all worthy DIEs under DIE. */ | |
6366 | ||
6367 | static void | |
7080f735 | 6368 | assign_symbol_names (dw_die_ref die) |
881c6935 | 6369 | { |
b3694847 | 6370 | dw_die_ref c; |
881c6935 JM |
6371 | |
6372 | if (is_symbol_die (die)) | |
6373 | { | |
6374 | if (comdat_symbol_id) | |
6375 | { | |
6376 | char *p = alloca (strlen (comdat_symbol_id) + 64); | |
2ad9852d | 6377 | |
881c6935 JM |
6378 | sprintf (p, "%s.%s.%x", DIE_LABEL_PREFIX, |
6379 | comdat_symbol_id, comdat_symbol_number++); | |
6380 | die->die_symbol = xstrdup (p); | |
6381 | } | |
6382 | else | |
63e46568 | 6383 | die->die_symbol = gen_internal_sym ("LDIE"); |
881c6935 JM |
6384 | } |
6385 | ||
d6eeb3ba | 6386 | FOR_EACH_CHILD (die, c, assign_symbol_names (c)); |
881c6935 JM |
6387 | } |
6388 | ||
cc0017a9 ZD |
6389 | struct cu_hash_table_entry |
6390 | { | |
6391 | dw_die_ref cu; | |
6392 | unsigned min_comdat_num, max_comdat_num; | |
6393 | struct cu_hash_table_entry *next; | |
6394 | }; | |
6395 | ||
6396 | /* Routines to manipulate hash table of CUs. */ | |
6397 | static hashval_t | |
7080f735 | 6398 | htab_cu_hash (const void *of) |
cc0017a9 ZD |
6399 | { |
6400 | const struct cu_hash_table_entry *entry = of; | |
6401 | ||
6402 | return htab_hash_string (entry->cu->die_symbol); | |
6403 | } | |
6404 | ||
6405 | static int | |
7080f735 | 6406 | htab_cu_eq (const void *of1, const void *of2) |
cc0017a9 ZD |
6407 | { |
6408 | const struct cu_hash_table_entry *entry1 = of1; | |
6409 | const struct die_struct *entry2 = of2; | |
6410 | ||
6411 | return !strcmp (entry1->cu->die_symbol, entry2->die_symbol); | |
6412 | } | |
6413 | ||
6414 | static void | |
7080f735 | 6415 | htab_cu_del (void *what) |
cc0017a9 ZD |
6416 | { |
6417 | struct cu_hash_table_entry *next, *entry = what; | |
6418 | ||
6419 | while (entry) | |
6420 | { | |
6421 | next = entry->next; | |
6422 | free (entry); | |
6423 | entry = next; | |
6424 | } | |
6425 | } | |
6426 | ||
6427 | /* Check whether we have already seen this CU and set up SYM_NUM | |
6428 | accordingly. */ | |
6429 | static int | |
7080f735 | 6430 | check_duplicate_cu (dw_die_ref cu, htab_t htable, unsigned int *sym_num) |
cc0017a9 ZD |
6431 | { |
6432 | struct cu_hash_table_entry dummy; | |
6433 | struct cu_hash_table_entry **slot, *entry, *last = &dummy; | |
6434 | ||
6435 | dummy.max_comdat_num = 0; | |
6436 | ||
6437 | slot = (struct cu_hash_table_entry **) | |
6438 | htab_find_slot_with_hash (htable, cu, htab_hash_string (cu->die_symbol), | |
6439 | INSERT); | |
6440 | entry = *slot; | |
6441 | ||
6442 | for (; entry; last = entry, entry = entry->next) | |
6443 | { | |
6444 | if (same_die_p_wrap (cu, entry->cu)) | |
6445 | break; | |
6446 | } | |
6447 | ||
6448 | if (entry) | |
6449 | { | |
6450 | *sym_num = entry->min_comdat_num; | |
6451 | return 1; | |
6452 | } | |
6453 | ||
5ed6ace5 | 6454 | entry = XCNEW (struct cu_hash_table_entry); |
cc0017a9 ZD |
6455 | entry->cu = cu; |
6456 | entry->min_comdat_num = *sym_num = last->max_comdat_num; | |
6457 | entry->next = *slot; | |
6458 | *slot = entry; | |
6459 | ||
6460 | return 0; | |
6461 | } | |
6462 | ||
6463 | /* Record SYM_NUM to record of CU in HTABLE. */ | |
6464 | static void | |
7080f735 | 6465 | record_comdat_symbol_number (dw_die_ref cu, htab_t htable, unsigned int sym_num) |
cc0017a9 ZD |
6466 | { |
6467 | struct cu_hash_table_entry **slot, *entry; | |
6468 | ||
6469 | slot = (struct cu_hash_table_entry **) | |
6470 | htab_find_slot_with_hash (htable, cu, htab_hash_string (cu->die_symbol), | |
6471 | NO_INSERT); | |
6472 | entry = *slot; | |
6473 | ||
6474 | entry->max_comdat_num = sym_num; | |
6475 | } | |
6476 | ||
881c6935 JM |
6477 | /* Traverse the DIE (which is always comp_unit_die), and set up |
6478 | additional compilation units for each of the include files we see | |
6479 | bracketed by BINCL/EINCL. */ | |
6480 | ||
6481 | static void | |
7080f735 | 6482 | break_out_includes (dw_die_ref die) |
881c6935 | 6483 | { |
d6eeb3ba | 6484 | dw_die_ref c; |
b3694847 | 6485 | dw_die_ref unit = NULL; |
cc0017a9 ZD |
6486 | limbo_die_node *node, **pnode; |
6487 | htab_t cu_hash_table; | |
881c6935 | 6488 | |
d6eeb3ba GK |
6489 | c = die->die_child; |
6490 | if (c) do { | |
6491 | dw_die_ref prev = c; | |
6492 | c = c->die_sib; | |
6493 | while (c->die_tag == DW_TAG_GNU_BINCL || c->die_tag == DW_TAG_GNU_EINCL | |
6494 | || (unit && is_comdat_die (c))) | |
6495 | { | |
6496 | dw_die_ref next = c->die_sib; | |
6497 | ||
6498 | /* This DIE is for a secondary CU; remove it from the main one. */ | |
6499 | remove_child_with_prev (c, prev); | |
2878ea73 | 6500 | |
d6eeb3ba GK |
6501 | if (c->die_tag == DW_TAG_GNU_BINCL) |
6502 | unit = push_new_compile_unit (unit, c); | |
6503 | else if (c->die_tag == DW_TAG_GNU_EINCL) | |
6504 | unit = pop_compile_unit (unit); | |
6505 | else | |
6506 | add_child_die (unit, c); | |
6507 | c = next; | |
6508 | if (c == die->die_child) | |
6509 | break; | |
6510 | } | |
6511 | } while (c != die->die_child); | |
881c6935 JM |
6512 | |
6513 | #if 0 | |
6514 | /* We can only use this in debugging, since the frontend doesn't check | |
0b34cf1e | 6515 | to make sure that we leave every include file we enter. */ |
ced3f397 | 6516 | gcc_assert (!unit); |
881c6935 JM |
6517 | #endif |
6518 | ||
6519 | assign_symbol_names (die); | |
cc0017a9 ZD |
6520 | cu_hash_table = htab_create (10, htab_cu_hash, htab_cu_eq, htab_cu_del); |
6521 | for (node = limbo_die_list, pnode = &limbo_die_list; | |
6522 | node; | |
6523 | node = node->next) | |
881c6935 | 6524 | { |
cc0017a9 ZD |
6525 | int is_dupl; |
6526 | ||
881c6935 | 6527 | compute_section_prefix (node->die); |
cc0017a9 ZD |
6528 | is_dupl = check_duplicate_cu (node->die, cu_hash_table, |
6529 | &comdat_symbol_number); | |
881c6935 | 6530 | assign_symbol_names (node->die); |
cc0017a9 ZD |
6531 | if (is_dupl) |
6532 | *pnode = node->next; | |
6533 | else | |
73c68f61 | 6534 | { |
cc0017a9 ZD |
6535 | pnode = &node->next; |
6536 | record_comdat_symbol_number (node->die, cu_hash_table, | |
6537 | comdat_symbol_number); | |
6538 | } | |
881c6935 | 6539 | } |
cc0017a9 | 6540 | htab_delete (cu_hash_table); |
881c6935 JM |
6541 | } |
6542 | ||
6543 | /* Traverse the DIE and add a sibling attribute if it may have the | |
6544 | effect of speeding up access to siblings. To save some space, | |
6545 | avoid generating sibling attributes for DIE's without children. */ | |
6546 | ||
6547 | static void | |
7080f735 | 6548 | add_sibling_attributes (dw_die_ref die) |
881c6935 | 6549 | { |
b3694847 | 6550 | dw_die_ref c; |
881c6935 | 6551 | |
d6eeb3ba GK |
6552 | if (! die->die_child) |
6553 | return; | |
6554 | ||
6555 | if (die->die_parent && die != die->die_parent->die_child) | |
7d9d8943 AM |
6556 | add_AT_die_ref (die, DW_AT_sibling, die->die_sib); |
6557 | ||
d6eeb3ba | 6558 | FOR_EACH_CHILD (die, c, add_sibling_attributes (c)); |
7d9d8943 AM |
6559 | } |
6560 | ||
2ad9852d RK |
6561 | /* Output all location lists for the DIE and its children. */ |
6562 | ||
63e46568 | 6563 | static void |
7080f735 | 6564 | output_location_lists (dw_die_ref die) |
63e46568 DB |
6565 | { |
6566 | dw_die_ref c; | |
1a27722f GK |
6567 | dw_attr_ref a; |
6568 | unsigned ix; | |
2ad9852d | 6569 | |
1a27722f GK |
6570 | for (ix = 0; VEC_iterate (dw_attr_node, die->die_attr, ix, a); ix++) |
6571 | if (AT_class (a) == dw_val_class_loc_list) | |
6572 | output_loc_list (AT_loc_list (a)); | |
2ad9852d | 6573 | |
d6eeb3ba | 6574 | FOR_EACH_CHILD (die, c, output_location_lists (c)); |
63e46568 | 6575 | } |
c26fbbca | 6576 | |
2ad9852d RK |
6577 | /* The format of each DIE (and its attribute value pairs) is encoded in an |
6578 | abbreviation table. This routine builds the abbreviation table and assigns | |
6579 | a unique abbreviation id for each abbreviation entry. The children of each | |
6580 | die are visited recursively. */ | |
7d9d8943 AM |
6581 | |
6582 | static void | |
7080f735 | 6583 | build_abbrev_table (dw_die_ref die) |
7d9d8943 | 6584 | { |
b3694847 SS |
6585 | unsigned long abbrev_id; |
6586 | unsigned int n_alloc; | |
6587 | dw_die_ref c; | |
1a27722f GK |
6588 | dw_attr_ref a; |
6589 | unsigned ix; | |
881c6935 JM |
6590 | |
6591 | /* Scan the DIE references, and mark as external any that refer to | |
1bfb5f8f | 6592 | DIEs from other CUs (i.e. those which are not marked). */ |
1a27722f GK |
6593 | for (ix = 0; VEC_iterate (dw_attr_node, die->die_attr, ix, a); ix++) |
6594 | if (AT_class (a) == dw_val_class_die_ref | |
6595 | && AT_ref (a)->die_mark == 0) | |
2ad9852d | 6596 | { |
1a27722f | 6597 | gcc_assert (AT_ref (a)->die_symbol); |
2ad9852d | 6598 | |
1a27722f | 6599 | set_AT_ref_external (a, 1); |
2ad9852d | 6600 | } |
881c6935 | 6601 | |
7d9d8943 AM |
6602 | for (abbrev_id = 1; abbrev_id < abbrev_die_table_in_use; ++abbrev_id) |
6603 | { | |
b3694847 | 6604 | dw_die_ref abbrev = abbrev_die_table[abbrev_id]; |
1a27722f GK |
6605 | dw_attr_ref die_a, abbrev_a; |
6606 | unsigned ix; | |
6607 | bool ok = true; | |
2878ea73 | 6608 | |
1a27722f GK |
6609 | if (abbrev->die_tag != die->die_tag) |
6610 | continue; | |
6611 | if ((abbrev->die_child != NULL) != (die->die_child != NULL)) | |
6612 | continue; | |
2878ea73 | 6613 | |
1a27722f GK |
6614 | if (VEC_length (dw_attr_node, abbrev->die_attr) |
6615 | != VEC_length (dw_attr_node, die->die_attr)) | |
6616 | continue; | |
2878ea73 | 6617 | |
1a27722f | 6618 | for (ix = 0; VEC_iterate (dw_attr_node, die->die_attr, ix, die_a); ix++) |
7d9d8943 | 6619 | { |
1a27722f GK |
6620 | abbrev_a = VEC_index (dw_attr_node, abbrev->die_attr, ix); |
6621 | if ((abbrev_a->dw_attr != die_a->dw_attr) | |
6622 | || (value_format (abbrev_a) != value_format (die_a))) | |
7d9d8943 | 6623 | { |
1a27722f GK |
6624 | ok = false; |
6625 | break; | |
7d9d8943 AM |
6626 | } |
6627 | } | |
1a27722f GK |
6628 | if (ok) |
6629 | break; | |
7d9d8943 AM |
6630 | } |
6631 | ||
6632 | if (abbrev_id >= abbrev_die_table_in_use) | |
6633 | { | |
6634 | if (abbrev_die_table_in_use >= abbrev_die_table_allocated) | |
6635 | { | |
6636 | n_alloc = abbrev_die_table_allocated + ABBREV_DIE_TABLE_INCREMENT; | |
17211ab5 GK |
6637 | abbrev_die_table = ggc_realloc (abbrev_die_table, |
6638 | sizeof (dw_die_ref) * n_alloc); | |
7d9d8943 | 6639 | |
703ad42b | 6640 | memset (&abbrev_die_table[abbrev_die_table_allocated], 0, |
7d9d8943 AM |
6641 | (n_alloc - abbrev_die_table_allocated) * sizeof (dw_die_ref)); |
6642 | abbrev_die_table_allocated = n_alloc; | |
6643 | } | |
6644 | ||
6645 | ++abbrev_die_table_in_use; | |
6646 | abbrev_die_table[abbrev_id] = die; | |
6647 | } | |
6648 | ||
6649 | die->die_abbrev = abbrev_id; | |
d6eeb3ba | 6650 | FOR_EACH_CHILD (die, c, build_abbrev_table (c)); |
7d9d8943 AM |
6651 | } |
6652 | \f | |
3f76745e JM |
6653 | /* Return the power-of-two number of bytes necessary to represent VALUE. */ |
6654 | ||
6655 | static int | |
7080f735 | 6656 | constant_size (long unsigned int value) |
3f76745e JM |
6657 | { |
6658 | int log; | |
6659 | ||
6660 | if (value == 0) | |
6661 | log = 0; | |
a3f97cbb | 6662 | else |
3f76745e | 6663 | log = floor_log2 (value); |
71dfc51f | 6664 | |
3f76745e JM |
6665 | log = log / 8; |
6666 | log = 1 << (floor_log2 (log) + 1); | |
6667 | ||
6668 | return log; | |
a3f97cbb JW |
6669 | } |
6670 | ||
2ad9852d | 6671 | /* Return the size of a DIE as it is represented in the |
3f76745e | 6672 | .debug_info section. */ |
71dfc51f | 6673 | |
3f76745e | 6674 | static unsigned long |
7080f735 | 6675 | size_of_die (dw_die_ref die) |
a3f97cbb | 6676 | { |
b3694847 SS |
6677 | unsigned long size = 0; |
6678 | dw_attr_ref a; | |
1a27722f | 6679 | unsigned ix; |
71dfc51f | 6680 | |
3f76745e | 6681 | size += size_of_uleb128 (die->die_abbrev); |
1a27722f | 6682 | for (ix = 0; VEC_iterate (dw_attr_node, die->die_attr, ix, a); ix++) |
a3f97cbb | 6683 | { |
a96c67ec | 6684 | switch (AT_class (a)) |
a3f97cbb JW |
6685 | { |
6686 | case dw_val_class_addr: | |
a1a4189d | 6687 | size += DWARF2_ADDR_SIZE; |
a3f97cbb | 6688 | break; |
a20612aa RH |
6689 | case dw_val_class_offset: |
6690 | size += DWARF_OFFSET_SIZE; | |
6691 | break; | |
a3f97cbb | 6692 | case dw_val_class_loc: |
3f76745e | 6693 | { |
b3694847 | 6694 | unsigned long lsize = size_of_locs (AT_loc (a)); |
71dfc51f | 6695 | |
3f76745e JM |
6696 | /* Block length. */ |
6697 | size += constant_size (lsize); | |
6698 | size += lsize; | |
6699 | } | |
a3f97cbb | 6700 | break; |
63e46568 DB |
6701 | case dw_val_class_loc_list: |
6702 | size += DWARF_OFFSET_SIZE; | |
6703 | break; | |
2bee6045 JJ |
6704 | case dw_val_class_range_list: |
6705 | size += DWARF_OFFSET_SIZE; | |
6706 | break; | |
a3f97cbb | 6707 | case dw_val_class_const: |
25dd13ec | 6708 | size += size_of_sleb128 (AT_int (a)); |
a3f97cbb JW |
6709 | break; |
6710 | case dw_val_class_unsigned_const: | |
a96c67ec | 6711 | size += constant_size (AT_unsigned (a)); |
a3f97cbb | 6712 | break; |
469ac993 | 6713 | case dw_val_class_long_long: |
2e4b9b8c | 6714 | size += 1 + 2*HOST_BITS_PER_LONG/HOST_BITS_PER_CHAR; /* block */ |
469ac993 | 6715 | break; |
e7ee3914 AM |
6716 | case dw_val_class_vec: |
6717 | size += 1 + (a->dw_attr_val.v.val_vec.length | |
6718 | * a->dw_attr_val.v.val_vec.elt_size); /* block */ | |
a3f97cbb JW |
6719 | break; |
6720 | case dw_val_class_flag: | |
3f76745e | 6721 | size += 1; |
a3f97cbb JW |
6722 | break; |
6723 | case dw_val_class_die_ref: | |
323658ea ZD |
6724 | if (AT_ref_external (a)) |
6725 | size += DWARF2_ADDR_SIZE; | |
6726 | else | |
6727 | size += DWARF_OFFSET_SIZE; | |
a3f97cbb JW |
6728 | break; |
6729 | case dw_val_class_fde_ref: | |
3f76745e | 6730 | size += DWARF_OFFSET_SIZE; |
a3f97cbb JW |
6731 | break; |
6732 | case dw_val_class_lbl_id: | |
a1a4189d | 6733 | size += DWARF2_ADDR_SIZE; |
3f76745e | 6734 | break; |
192d0f89 GK |
6735 | case dw_val_class_lineptr: |
6736 | case dw_val_class_macptr: | |
3f76745e JM |
6737 | size += DWARF_OFFSET_SIZE; |
6738 | break; | |
6739 | case dw_val_class_str: | |
9eb4015a JJ |
6740 | if (AT_string_form (a) == DW_FORM_strp) |
6741 | size += DWARF_OFFSET_SIZE; | |
6742 | else | |
17211ab5 | 6743 | size += strlen (a->dw_attr_val.v.val_str->str) + 1; |
3f76745e | 6744 | break; |
d5688810 GK |
6745 | case dw_val_class_file: |
6746 | size += constant_size (maybe_emit_file (a->dw_attr_val.v.val_file)); | |
6747 | break; | |
3f76745e | 6748 | default: |
ced3f397 | 6749 | gcc_unreachable (); |
3f76745e | 6750 | } |
a3f97cbb | 6751 | } |
3f76745e JM |
6752 | |
6753 | return size; | |
a3f97cbb JW |
6754 | } |
6755 | ||
2ad9852d RK |
6756 | /* Size the debugging information associated with a given DIE. Visits the |
6757 | DIE's children recursively. Updates the global variable next_die_offset, on | |
6758 | each time through. Uses the current value of next_die_offset to update the | |
6759 | die_offset field in each DIE. */ | |
71dfc51f | 6760 | |
a3f97cbb | 6761 | static void |
7080f735 | 6762 | calc_die_sizes (dw_die_ref die) |
a3f97cbb | 6763 | { |
b3694847 | 6764 | dw_die_ref c; |
2ad9852d | 6765 | |
3f76745e JM |
6766 | die->die_offset = next_die_offset; |
6767 | next_die_offset += size_of_die (die); | |
71dfc51f | 6768 | |
d6eeb3ba | 6769 | FOR_EACH_CHILD (die, c, calc_die_sizes (c)); |
71dfc51f | 6770 | |
3f76745e JM |
6771 | if (die->die_child != NULL) |
6772 | /* Count the null byte used to terminate sibling lists. */ | |
6773 | next_die_offset += 1; | |
a3f97cbb JW |
6774 | } |
6775 | ||
1bfb5f8f | 6776 | /* Set the marks for a die and its children. We do this so |
881c6935 | 6777 | that we know whether or not a reference needs to use FORM_ref_addr; only |
1bfb5f8f JM |
6778 | DIEs in the same CU will be marked. We used to clear out the offset |
6779 | and use that as the flag, but ran into ordering problems. */ | |
881c6935 JM |
6780 | |
6781 | static void | |
7080f735 | 6782 | mark_dies (dw_die_ref die) |
881c6935 | 6783 | { |
b3694847 | 6784 | dw_die_ref c; |
2ad9852d | 6785 | |
ced3f397 | 6786 | gcc_assert (!die->die_mark); |
7080f735 | 6787 | |
1bfb5f8f | 6788 | die->die_mark = 1; |
d6eeb3ba | 6789 | FOR_EACH_CHILD (die, c, mark_dies (c)); |
1bfb5f8f JM |
6790 | } |
6791 | ||
6792 | /* Clear the marks for a die and its children. */ | |
6793 | ||
6794 | static void | |
7080f735 | 6795 | unmark_dies (dw_die_ref die) |
1bfb5f8f | 6796 | { |
b3694847 | 6797 | dw_die_ref c; |
2ad9852d | 6798 | |
ced3f397 | 6799 | gcc_assert (die->die_mark); |
7080f735 | 6800 | |
1bfb5f8f | 6801 | die->die_mark = 0; |
d6eeb3ba | 6802 | FOR_EACH_CHILD (die, c, unmark_dies (c)); |
881c6935 JM |
6803 | } |
6804 | ||
cc0017a9 ZD |
6805 | /* Clear the marks for a die, its children and referred dies. */ |
6806 | ||
6807 | static void | |
7080f735 | 6808 | unmark_all_dies (dw_die_ref die) |
cc0017a9 ZD |
6809 | { |
6810 | dw_die_ref c; | |
6811 | dw_attr_ref a; | |
1a27722f | 6812 | unsigned ix; |
cc0017a9 ZD |
6813 | |
6814 | if (!die->die_mark) | |
6815 | return; | |
6816 | die->die_mark = 0; | |
6817 | ||
d6eeb3ba | 6818 | FOR_EACH_CHILD (die, c, unmark_all_dies (c)); |
cc0017a9 | 6819 | |
1a27722f | 6820 | for (ix = 0; VEC_iterate (dw_attr_node, die->die_attr, ix, a); ix++) |
cc0017a9 ZD |
6821 | if (AT_class (a) == dw_val_class_die_ref) |
6822 | unmark_all_dies (AT_ref (a)); | |
6823 | } | |
6824 | ||
2878ea73 | 6825 | /* Return the size of the .debug_pubnames or .debug_pubtypes table |
89708594 | 6826 | generated for the compilation unit. */ |
a94dbf2c | 6827 | |
3f76745e | 6828 | static unsigned long |
89708594 | 6829 | size_of_pubnames (VEC (pubname_entry, gc) * names) |
a94dbf2c | 6830 | { |
b3694847 SS |
6831 | unsigned long size; |
6832 | unsigned i; | |
89708594 | 6833 | pubname_ref p; |
469ac993 | 6834 | |
3f76745e | 6835 | size = DWARF_PUBNAMES_HEADER_SIZE; |
89708594 CT |
6836 | for (i = 0; VEC_iterate (pubname_entry, names, i, p); i++) |
6837 | if (names != pubtype_table | |
6838 | || p->die->die_offset != 0 | |
6839 | || !flag_eliminate_unused_debug_types) | |
6840 | size += strlen (p->name) + DWARF_OFFSET_SIZE + 1; | |
a94dbf2c | 6841 | |
3f76745e JM |
6842 | size += DWARF_OFFSET_SIZE; |
6843 | return size; | |
a94dbf2c JM |
6844 | } |
6845 | ||
956d6950 | 6846 | /* Return the size of the information in the .debug_aranges section. */ |
469ac993 | 6847 | |
3f76745e | 6848 | static unsigned long |
7080f735 | 6849 | size_of_aranges (void) |
469ac993 | 6850 | { |
b3694847 | 6851 | unsigned long size; |
469ac993 | 6852 | |
3f76745e | 6853 | size = DWARF_ARANGES_HEADER_SIZE; |
469ac993 | 6854 | |
3f76745e | 6855 | /* Count the address/length pair for this compilation unit. */ |
a1a4189d JB |
6856 | size += 2 * DWARF2_ADDR_SIZE; |
6857 | size += 2 * DWARF2_ADDR_SIZE * arange_table_in_use; | |
469ac993 | 6858 | |
3f76745e | 6859 | /* Count the two zero words used to terminated the address range table. */ |
a1a4189d | 6860 | size += 2 * DWARF2_ADDR_SIZE; |
3f76745e JM |
6861 | return size; |
6862 | } | |
6863 | \f | |
6864 | /* Select the encoding of an attribute value. */ | |
6865 | ||
6866 | static enum dwarf_form | |
7080f735 | 6867 | value_format (dw_attr_ref a) |
3f76745e | 6868 | { |
a96c67ec | 6869 | switch (a->dw_attr_val.val_class) |
469ac993 | 6870 | { |
3f76745e JM |
6871 | case dw_val_class_addr: |
6872 | return DW_FORM_addr; | |
2bee6045 | 6873 | case dw_val_class_range_list: |
a20612aa | 6874 | case dw_val_class_offset: |
0c33762a | 6875 | case dw_val_class_loc_list: |
ced3f397 NS |
6876 | switch (DWARF_OFFSET_SIZE) |
6877 | { | |
6878 | case 4: | |
6879 | return DW_FORM_data4; | |
6880 | case 8: | |
6881 | return DW_FORM_data8; | |
6882 | default: | |
6883 | gcc_unreachable (); | |
6884 | } | |
3f76745e | 6885 | case dw_val_class_loc: |
a96c67ec | 6886 | switch (constant_size (size_of_locs (AT_loc (a)))) |
469ac993 | 6887 | { |
3f76745e JM |
6888 | case 1: |
6889 | return DW_FORM_block1; | |
6890 | case 2: | |
6891 | return DW_FORM_block2; | |
469ac993 | 6892 | default: |
ced3f397 | 6893 | gcc_unreachable (); |
469ac993 | 6894 | } |
3f76745e | 6895 | case dw_val_class_const: |
25dd13ec | 6896 | return DW_FORM_sdata; |
3f76745e | 6897 | case dw_val_class_unsigned_const: |
a96c67ec | 6898 | switch (constant_size (AT_unsigned (a))) |
3f76745e JM |
6899 | { |
6900 | case 1: | |
6901 | return DW_FORM_data1; | |
6902 | case 2: | |
6903 | return DW_FORM_data2; | |
6904 | case 4: | |
6905 | return DW_FORM_data4; | |
6906 | case 8: | |
6907 | return DW_FORM_data8; | |
6908 | default: | |
ced3f397 | 6909 | gcc_unreachable (); |
3f76745e JM |
6910 | } |
6911 | case dw_val_class_long_long: | |
6912 | return DW_FORM_block1; | |
e7ee3914 | 6913 | case dw_val_class_vec: |
3f76745e JM |
6914 | return DW_FORM_block1; |
6915 | case dw_val_class_flag: | |
6916 | return DW_FORM_flag; | |
6917 | case dw_val_class_die_ref: | |
881c6935 JM |
6918 | if (AT_ref_external (a)) |
6919 | return DW_FORM_ref_addr; | |
6920 | else | |
6921 | return DW_FORM_ref; | |
3f76745e JM |
6922 | case dw_val_class_fde_ref: |
6923 | return DW_FORM_data; | |
6924 | case dw_val_class_lbl_id: | |
6925 | return DW_FORM_addr; | |
192d0f89 GK |
6926 | case dw_val_class_lineptr: |
6927 | case dw_val_class_macptr: | |
3f76745e JM |
6928 | return DW_FORM_data; |
6929 | case dw_val_class_str: | |
9eb4015a | 6930 | return AT_string_form (a); |
d5688810 GK |
6931 | case dw_val_class_file: |
6932 | switch (constant_size (maybe_emit_file (a->dw_attr_val.v.val_file))) | |
6933 | { | |
6934 | case 1: | |
6935 | return DW_FORM_data1; | |
6936 | case 2: | |
6937 | return DW_FORM_data2; | |
6938 | case 4: | |
6939 | return DW_FORM_data4; | |
6940 | default: | |
6941 | gcc_unreachable (); | |
6942 | } | |
a20612aa | 6943 | |
469ac993 | 6944 | default: |
ced3f397 | 6945 | gcc_unreachable (); |
469ac993 | 6946 | } |
a94dbf2c JM |
6947 | } |
6948 | ||
3f76745e | 6949 | /* Output the encoding of an attribute value. */ |
469ac993 | 6950 | |
3f76745e | 6951 | static void |
7080f735 | 6952 | output_value_format (dw_attr_ref a) |
a94dbf2c | 6953 | { |
a96c67ec | 6954 | enum dwarf_form form = value_format (a); |
2ad9852d | 6955 | |
2e4b9b8c | 6956 | dw2_asm_output_data_uleb128 (form, "(%s)", dwarf_form_name (form)); |
3f76745e | 6957 | } |
469ac993 | 6958 | |
3f76745e JM |
6959 | /* Output the .debug_abbrev section which defines the DIE abbreviation |
6960 | table. */ | |
469ac993 | 6961 | |
3f76745e | 6962 | static void |
7080f735 | 6963 | output_abbrev_section (void) |
3f76745e JM |
6964 | { |
6965 | unsigned long abbrev_id; | |
71dfc51f | 6966 | |
3f76745e JM |
6967 | for (abbrev_id = 1; abbrev_id < abbrev_die_table_in_use; ++abbrev_id) |
6968 | { | |
b3694847 | 6969 | dw_die_ref abbrev = abbrev_die_table[abbrev_id]; |
1a27722f GK |
6970 | unsigned ix; |
6971 | dw_attr_ref a_attr; | |
71dfc51f | 6972 | |
2e4b9b8c | 6973 | dw2_asm_output_data_uleb128 (abbrev_id, "(abbrev code)"); |
2e4b9b8c RH |
6974 | dw2_asm_output_data_uleb128 (abbrev->die_tag, "(TAG: %s)", |
6975 | dwarf_tag_name (abbrev->die_tag)); | |
71dfc51f | 6976 | |
2e4b9b8c RH |
6977 | if (abbrev->die_child != NULL) |
6978 | dw2_asm_output_data (1, DW_children_yes, "DW_children_yes"); | |
6979 | else | |
6980 | dw2_asm_output_data (1, DW_children_no, "DW_children_no"); | |
3f76745e | 6981 | |
1a27722f GK |
6982 | for (ix = 0; VEC_iterate (dw_attr_node, abbrev->die_attr, ix, a_attr); |
6983 | ix++) | |
3f76745e | 6984 | { |
2e4b9b8c RH |
6985 | dw2_asm_output_data_uleb128 (a_attr->dw_attr, "(%s)", |
6986 | dwarf_attr_name (a_attr->dw_attr)); | |
a96c67ec | 6987 | output_value_format (a_attr); |
469ac993 | 6988 | } |
469ac993 | 6989 | |
2e4b9b8c RH |
6990 | dw2_asm_output_data (1, 0, NULL); |
6991 | dw2_asm_output_data (1, 0, NULL); | |
469ac993 | 6992 | } |
81f374eb HPN |
6993 | |
6994 | /* Terminate the table. */ | |
2e4b9b8c | 6995 | dw2_asm_output_data (1, 0, NULL); |
a94dbf2c JM |
6996 | } |
6997 | ||
881c6935 JM |
6998 | /* Output a symbol we can use to refer to this DIE from another CU. */ |
6999 | ||
7000 | static inline void | |
7080f735 | 7001 | output_die_symbol (dw_die_ref die) |
881c6935 JM |
7002 | { |
7003 | char *sym = die->die_symbol; | |
7004 | ||
7005 | if (sym == 0) | |
7006 | return; | |
7007 | ||
7008 | if (strncmp (sym, DIE_LABEL_PREFIX, sizeof (DIE_LABEL_PREFIX) - 1) == 0) | |
7009 | /* We make these global, not weak; if the target doesn't support | |
7010 | .linkonce, it doesn't support combining the sections, so debugging | |
7011 | will break. */ | |
5fd9b178 | 7012 | targetm.asm_out.globalize_label (asm_out_file, sym); |
2ad9852d | 7013 | |
881c6935 JM |
7014 | ASM_OUTPUT_LABEL (asm_out_file, sym); |
7015 | } | |
7016 | ||
84a5b4f8 | 7017 | /* Return a new location list, given the begin and end range, and the |
2ad9852d RK |
7018 | expression. gensym tells us whether to generate a new internal symbol for |
7019 | this location list node, which is done for the head of the list only. */ | |
7020 | ||
84a5b4f8 | 7021 | static inline dw_loc_list_ref |
7080f735 AJ |
7022 | new_loc_list (dw_loc_descr_ref expr, const char *begin, const char *end, |
7023 | const char *section, unsigned int gensym) | |
84a5b4f8 | 7024 | { |
17211ab5 | 7025 | dw_loc_list_ref retlist = ggc_alloc_cleared (sizeof (dw_loc_list_node)); |
2ad9852d | 7026 | |
84a5b4f8 DB |
7027 | retlist->begin = begin; |
7028 | retlist->end = end; | |
7029 | retlist->expr = expr; | |
7030 | retlist->section = section; | |
c26fbbca | 7031 | if (gensym) |
84a5b4f8 | 7032 | retlist->ll_symbol = gen_internal_sym ("LLST"); |
2ad9852d | 7033 | |
84a5b4f8 DB |
7034 | return retlist; |
7035 | } | |
7036 | ||
f9da5064 | 7037 | /* Add a location description expression to a location list. */ |
2ad9852d | 7038 | |
84a5b4f8 | 7039 | static inline void |
7080f735 AJ |
7040 | add_loc_descr_to_loc_list (dw_loc_list_ref *list_head, dw_loc_descr_ref descr, |
7041 | const char *begin, const char *end, | |
7042 | const char *section) | |
84a5b4f8 | 7043 | { |
b3694847 | 7044 | dw_loc_list_ref *d; |
c26fbbca | 7045 | |
30f7a378 | 7046 | /* Find the end of the chain. */ |
84a5b4f8 DB |
7047 | for (d = list_head; (*d) != NULL; d = &(*d)->dw_loc_next) |
7048 | ; | |
2ad9852d | 7049 | |
f9da5064 | 7050 | /* Add a new location list node to the list. */ |
84a5b4f8 DB |
7051 | *d = new_loc_list (descr, begin, end, section, 0); |
7052 | } | |
7053 | ||
87c8b4be CT |
7054 | static void |
7055 | dwarf2out_switch_text_section (void) | |
7056 | { | |
7057 | dw_fde_ref fde; | |
7058 | ||
1ad435a5 | 7059 | gcc_assert (cfun); |
c7466dee | 7060 | |
87c8b4be CT |
7061 | fde = &fde_table[fde_table_in_use - 1]; |
7062 | fde->dw_fde_switched_sections = true; | |
c7466dee CT |
7063 | fde->dw_fde_hot_section_label = cfun->hot_section_label; |
7064 | fde->dw_fde_hot_section_end_label = cfun->hot_section_end_label; | |
7065 | fde->dw_fde_unlikely_section_label = cfun->cold_section_label; | |
7066 | fde->dw_fde_unlikely_section_end_label = cfun->cold_section_end_label; | |
1146e682 | 7067 | have_multiple_function_sections = true; |
6a10f7b3 RS |
7068 | |
7069 | /* Reset the current label on switching text sections, so that we | |
7070 | don't attempt to advance_loc4 between labels in different sections. */ | |
7071 | fde->dw_fde_current_label = NULL; | |
87c8b4be CT |
7072 | } |
7073 | ||
f9da5064 | 7074 | /* Output the location list given to us. */ |
2ad9852d | 7075 | |
63e46568 | 7076 | static void |
7080f735 | 7077 | output_loc_list (dw_loc_list_ref list_head) |
63e46568 | 7078 | { |
2ad9852d RK |
7079 | dw_loc_list_ref curr = list_head; |
7080 | ||
63e46568 | 7081 | ASM_OUTPUT_LABEL (asm_out_file, list_head->ll_symbol); |
a20612aa | 7082 | |
1711adc2 | 7083 | /* Walk the location list, and output each range + expression. */ |
c26fbbca | 7084 | for (curr = list_head; curr != NULL; curr = curr->dw_loc_next) |
63e46568 | 7085 | { |
2bee6045 | 7086 | unsigned long size; |
62760ffd CT |
7087 | /* Don't output an entry that starts and ends at the same address. */ |
7088 | if (strcmp (curr->begin, curr->end) == 0) | |
7089 | continue; | |
1146e682 | 7090 | if (!have_multiple_function_sections) |
1711adc2 DB |
7091 | { |
7092 | dw2_asm_output_delta (DWARF2_ADDR_SIZE, curr->begin, curr->section, | |
7093 | "Location list begin address (%s)", | |
7094 | list_head->ll_symbol); | |
7095 | dw2_asm_output_delta (DWARF2_ADDR_SIZE, curr->end, curr->section, | |
7096 | "Location list end address (%s)", | |
7097 | list_head->ll_symbol); | |
7098 | } | |
7099 | else | |
7100 | { | |
7101 | dw2_asm_output_addr (DWARF2_ADDR_SIZE, curr->begin, | |
7102 | "Location list begin address (%s)", | |
7103 | list_head->ll_symbol); | |
7104 | dw2_asm_output_addr (DWARF2_ADDR_SIZE, curr->end, | |
7105 | "Location list end address (%s)", | |
7106 | list_head->ll_symbol); | |
7107 | } | |
63e46568 | 7108 | size = size_of_locs (curr->expr); |
c26fbbca | 7109 | |
63e46568 | 7110 | /* Output the block length for this list of location operations. */ |
ced3f397 | 7111 | gcc_assert (size <= 0xffff); |
2bee6045 JJ |
7112 | dw2_asm_output_data (2, size, "%s", "Location expression size"); |
7113 | ||
63e46568 DB |
7114 | output_loc_sequence (curr->expr); |
7115 | } | |
2ad9852d | 7116 | |
1711adc2 | 7117 | dw2_asm_output_data (DWARF2_ADDR_SIZE, 0, |
aafdcfcd NS |
7118 | "Location list terminator begin (%s)", |
7119 | list_head->ll_symbol); | |
1711adc2 | 7120 | dw2_asm_output_data (DWARF2_ADDR_SIZE, 0, |
aafdcfcd NS |
7121 | "Location list terminator end (%s)", |
7122 | list_head->ll_symbol); | |
63e46568 | 7123 | } |
9eb4015a | 7124 | |
3f76745e JM |
7125 | /* Output the DIE and its attributes. Called recursively to generate |
7126 | the definitions of each child DIE. */ | |
71dfc51f | 7127 | |
a3f97cbb | 7128 | static void |
7080f735 | 7129 | output_die (dw_die_ref die) |
a3f97cbb | 7130 | { |
b3694847 SS |
7131 | dw_attr_ref a; |
7132 | dw_die_ref c; | |
7133 | unsigned long size; | |
1a27722f | 7134 | unsigned ix; |
a94dbf2c | 7135 | |
881c6935 JM |
7136 | /* If someone in another CU might refer to us, set up a symbol for |
7137 | them to point to. */ | |
7138 | if (die->die_symbol) | |
7139 | output_die_symbol (die); | |
7140 | ||
2e4b9b8c | 7141 | dw2_asm_output_data_uleb128 (die->die_abbrev, "(DIE (0x%lx) %s)", |
8d5b1b67 GK |
7142 | (unsigned long)die->die_offset, |
7143 | dwarf_tag_name (die->die_tag)); | |
a94dbf2c | 7144 | |
1a27722f | 7145 | for (ix = 0; VEC_iterate (dw_attr_node, die->die_attr, ix, a); ix++) |
a3f97cbb | 7146 | { |
2e4b9b8c RH |
7147 | const char *name = dwarf_attr_name (a->dw_attr); |
7148 | ||
a96c67ec | 7149 | switch (AT_class (a)) |
3f76745e JM |
7150 | { |
7151 | case dw_val_class_addr: | |
2e4b9b8c | 7152 | dw2_asm_output_addr_rtx (DWARF2_ADDR_SIZE, AT_addr (a), "%s", name); |
3f76745e | 7153 | break; |
a3f97cbb | 7154 | |
a20612aa RH |
7155 | case dw_val_class_offset: |
7156 | dw2_asm_output_data (DWARF_OFFSET_SIZE, a->dw_attr_val.v.val_offset, | |
7157 | "%s", name); | |
7158 | break; | |
7159 | ||
2bee6045 JJ |
7160 | case dw_val_class_range_list: |
7161 | { | |
7162 | char *p = strchr (ranges_section_label, '\0'); | |
7163 | ||
38f9cd4c AJ |
7164 | sprintf (p, "+" HOST_WIDE_INT_PRINT_HEX, |
7165 | a->dw_attr_val.v.val_offset); | |
2bee6045 | 7166 | dw2_asm_output_offset (DWARF_OFFSET_SIZE, ranges_section_label, |
192d0f89 | 7167 | debug_ranges_section, "%s", name); |
2bee6045 JJ |
7168 | *p = '\0'; |
7169 | } | |
7170 | break; | |
7171 | ||
3f76745e | 7172 | case dw_val_class_loc: |
a96c67ec | 7173 | size = size_of_locs (AT_loc (a)); |
71dfc51f | 7174 | |
3f76745e | 7175 | /* Output the block length for this list of location operations. */ |
2e4b9b8c | 7176 | dw2_asm_output_data (constant_size (size), size, "%s", name); |
71dfc51f | 7177 | |
7d9d8943 | 7178 | output_loc_sequence (AT_loc (a)); |
a3f97cbb | 7179 | break; |
3f76745e JM |
7180 | |
7181 | case dw_val_class_const: | |
25dd13ec JW |
7182 | /* ??? It would be slightly more efficient to use a scheme like is |
7183 | used for unsigned constants below, but gdb 4.x does not sign | |
7184 | extend. Gdb 5.x does sign extend. */ | |
2e4b9b8c | 7185 | dw2_asm_output_data_sleb128 (AT_int (a), "%s", name); |
a3f97cbb | 7186 | break; |
3f76745e JM |
7187 | |
7188 | case dw_val_class_unsigned_const: | |
2e4b9b8c RH |
7189 | dw2_asm_output_data (constant_size (AT_unsigned (a)), |
7190 | AT_unsigned (a), "%s", name); | |
a3f97cbb | 7191 | break; |
3f76745e JM |
7192 | |
7193 | case dw_val_class_long_long: | |
2e4b9b8c RH |
7194 | { |
7195 | unsigned HOST_WIDE_INT first, second; | |
3f76745e | 7196 | |
2ad9852d RK |
7197 | dw2_asm_output_data (1, |
7198 | 2 * HOST_BITS_PER_LONG / HOST_BITS_PER_CHAR, | |
c26fbbca | 7199 | "%s", name); |
556273e0 | 7200 | |
2e4b9b8c RH |
7201 | if (WORDS_BIG_ENDIAN) |
7202 | { | |
7203 | first = a->dw_attr_val.v.val_long_long.hi; | |
7204 | second = a->dw_attr_val.v.val_long_long.low; | |
7205 | } | |
7206 | else | |
7207 | { | |
7208 | first = a->dw_attr_val.v.val_long_long.low; | |
7209 | second = a->dw_attr_val.v.val_long_long.hi; | |
7210 | } | |
2ad9852d RK |
7211 | |
7212 | dw2_asm_output_data (HOST_BITS_PER_LONG / HOST_BITS_PER_CHAR, | |
2e4b9b8c | 7213 | first, "long long constant"); |
2ad9852d | 7214 | dw2_asm_output_data (HOST_BITS_PER_LONG / HOST_BITS_PER_CHAR, |
2e4b9b8c RH |
7215 | second, NULL); |
7216 | } | |
a3f97cbb | 7217 | break; |
3f76745e | 7218 | |
e7ee3914 | 7219 | case dw_val_class_vec: |
c84e2712 | 7220 | { |
e7ee3914 AM |
7221 | unsigned int elt_size = a->dw_attr_val.v.val_vec.elt_size; |
7222 | unsigned int len = a->dw_attr_val.v.val_vec.length; | |
b3694847 | 7223 | unsigned int i; |
e7ee3914 | 7224 | unsigned char *p; |
c84e2712 | 7225 | |
e7ee3914 AM |
7226 | dw2_asm_output_data (1, len * elt_size, "%s", name); |
7227 | if (elt_size > sizeof (HOST_WIDE_INT)) | |
7228 | { | |
7229 | elt_size /= 2; | |
7230 | len *= 2; | |
7231 | } | |
7232 | for (i = 0, p = a->dw_attr_val.v.val_vec.array; | |
7233 | i < len; | |
7234 | i++, p += elt_size) | |
7235 | dw2_asm_output_data (elt_size, extract_int (p, elt_size), | |
7236 | "fp or vector constant word %u", i); | |
556273e0 | 7237 | break; |
c84e2712 | 7238 | } |
3f76745e JM |
7239 | |
7240 | case dw_val_class_flag: | |
2e4b9b8c | 7241 | dw2_asm_output_data (1, AT_flag (a), "%s", name); |
a3f97cbb | 7242 | break; |
a20612aa | 7243 | |
c26fbbca | 7244 | case dw_val_class_loc_list: |
63e46568 DB |
7245 | { |
7246 | char *sym = AT_loc_list (a)->ll_symbol; | |
2ad9852d | 7247 | |
ced3f397 | 7248 | gcc_assert (sym); |
192d0f89 GK |
7249 | dw2_asm_output_offset (DWARF_OFFSET_SIZE, sym, debug_loc_section, |
7250 | "%s", name); | |
63e46568 DB |
7251 | } |
7252 | break; | |
a20612aa | 7253 | |
3f76745e | 7254 | case dw_val_class_die_ref: |
881c6935 | 7255 | if (AT_ref_external (a)) |
2e4b9b8c RH |
7256 | { |
7257 | char *sym = AT_ref (a)->die_symbol; | |
2ad9852d | 7258 | |
ced3f397 | 7259 | gcc_assert (sym); |
192d0f89 GK |
7260 | dw2_asm_output_offset (DWARF2_ADDR_SIZE, sym, debug_info_section, |
7261 | "%s", name); | |
2e4b9b8c | 7262 | } |
881c6935 | 7263 | else |
ced3f397 NS |
7264 | { |
7265 | gcc_assert (AT_ref (a)->die_offset); | |
7266 | dw2_asm_output_data (DWARF_OFFSET_SIZE, AT_ref (a)->die_offset, | |
7267 | "%s", name); | |
7268 | } | |
a3f97cbb | 7269 | break; |
3f76745e JM |
7270 | |
7271 | case dw_val_class_fde_ref: | |
a6ab3aad JM |
7272 | { |
7273 | char l1[20]; | |
2ad9852d | 7274 | |
2e4b9b8c RH |
7275 | ASM_GENERATE_INTERNAL_LABEL (l1, FDE_LABEL, |
7276 | a->dw_attr_val.v.val_fde_index * 2); | |
192d0f89 GK |
7277 | dw2_asm_output_offset (DWARF_OFFSET_SIZE, l1, debug_frame_section, |
7278 | "%s", name); | |
a6ab3aad | 7279 | } |
a3f97cbb | 7280 | break; |
a3f97cbb | 7281 | |
3f76745e | 7282 | case dw_val_class_lbl_id: |
8e7fa2c8 | 7283 | dw2_asm_output_addr (DWARF2_ADDR_SIZE, AT_lbl (a), "%s", name); |
3f76745e | 7284 | break; |
71dfc51f | 7285 | |
192d0f89 GK |
7286 | case dw_val_class_lineptr: |
7287 | dw2_asm_output_offset (DWARF_OFFSET_SIZE, AT_lbl (a), | |
7288 | debug_line_section, "%s", name); | |
7289 | break; | |
7290 | ||
7291 | case dw_val_class_macptr: | |
7292 | dw2_asm_output_offset (DWARF_OFFSET_SIZE, AT_lbl (a), | |
7293 | debug_macinfo_section, "%s", name); | |
3f76745e | 7294 | break; |
a3f97cbb | 7295 | |
3f76745e | 7296 | case dw_val_class_str: |
9eb4015a JJ |
7297 | if (AT_string_form (a) == DW_FORM_strp) |
7298 | dw2_asm_output_offset (DWARF_OFFSET_SIZE, | |
7299 | a->dw_attr_val.v.val_str->label, | |
192d0f89 | 7300 | debug_str_section, |
a4cf1d85 | 7301 | "%s: \"%s\"", name, AT_string (a)); |
9eb4015a JJ |
7302 | else |
7303 | dw2_asm_output_nstring (AT_string (a), -1, "%s", name); | |
3f76745e | 7304 | break; |
b2932ae5 | 7305 | |
d5688810 GK |
7306 | case dw_val_class_file: |
7307 | { | |
7308 | int f = maybe_emit_file (a->dw_attr_val.v.val_file); | |
2878ea73 | 7309 | |
d5688810 GK |
7310 | dw2_asm_output_data (constant_size (f), f, "%s (%s)", name, |
7311 | a->dw_attr_val.v.val_file->filename); | |
7312 | break; | |
7313 | } | |
7314 | ||
3f76745e | 7315 | default: |
ced3f397 | 7316 | gcc_unreachable (); |
3f76745e | 7317 | } |
3f76745e | 7318 | } |
71dfc51f | 7319 | |
d6eeb3ba | 7320 | FOR_EACH_CHILD (die, c, output_die (c)); |
71dfc51f | 7321 | |
2ad9852d | 7322 | /* Add null byte to terminate sibling list. */ |
3f76745e | 7323 | if (die->die_child != NULL) |
2ad9852d | 7324 | dw2_asm_output_data (1, 0, "end of children of DIE 0x%lx", |
8d5b1b67 | 7325 | (unsigned long) die->die_offset); |
3f76745e | 7326 | } |
71dfc51f | 7327 | |
3f76745e JM |
7328 | /* Output the compilation unit that appears at the beginning of the |
7329 | .debug_info section, and precedes the DIE descriptions. */ | |
71dfc51f | 7330 | |
3f76745e | 7331 | static void |
7080f735 | 7332 | output_compilation_unit_header (void) |
3f76745e | 7333 | { |
9eb0ef7a KB |
7334 | if (DWARF_INITIAL_LENGTH_SIZE - DWARF_OFFSET_SIZE == 4) |
7335 | dw2_asm_output_data (4, 0xffffffff, | |
7336 | "Initial length escape value indicating 64-bit DWARF extension"); | |
7337 | dw2_asm_output_data (DWARF_OFFSET_SIZE, | |
2878ea73 | 7338 | next_die_offset - DWARF_INITIAL_LENGTH_SIZE, |
2e4b9b8c | 7339 | "Length of Compilation Unit Info"); |
2e4b9b8c | 7340 | dw2_asm_output_data (2, DWARF_VERSION, "DWARF version number"); |
2e4b9b8c | 7341 | dw2_asm_output_offset (DWARF_OFFSET_SIZE, abbrev_section_label, |
192d0f89 | 7342 | debug_abbrev_section, |
2e4b9b8c | 7343 | "Offset Into Abbrev. Section"); |
2e4b9b8c | 7344 | dw2_asm_output_data (1, DWARF2_ADDR_SIZE, "Pointer Size (in bytes)"); |
a3f97cbb JW |
7345 | } |
7346 | ||
881c6935 JM |
7347 | /* Output the compilation unit DIE and its children. */ |
7348 | ||
7349 | static void | |
7080f735 | 7350 | output_comp_unit (dw_die_ref die, int output_if_empty) |
881c6935 | 7351 | { |
ce1cc601 | 7352 | const char *secname; |
cc0017a9 ZD |
7353 | char *oldsym, *tmp; |
7354 | ||
7355 | /* Unless we are outputting main CU, we may throw away empty ones. */ | |
7356 | if (!output_if_empty && die->die_child == NULL) | |
7357 | return; | |
881c6935 | 7358 | |
2ad9852d RK |
7359 | /* Even if there are no children of this DIE, we must output the information |
7360 | about the compilation unit. Otherwise, on an empty translation unit, we | |
7361 | will generate a present, but empty, .debug_info section. IRIX 6.5 `nm' | |
7362 | will then complain when examining the file. First mark all the DIEs in | |
7363 | this CU so we know which get local refs. */ | |
1bfb5f8f JM |
7364 | mark_dies (die); |
7365 | ||
7366 | build_abbrev_table (die); | |
7367 | ||
6d2f8887 | 7368 | /* Initialize the beginning DIE offset - and calculate sizes/offsets. */ |
881c6935 JM |
7369 | next_die_offset = DWARF_COMPILE_UNIT_HEADER_SIZE; |
7370 | calc_die_sizes (die); | |
7371 | ||
cc0017a9 ZD |
7372 | oldsym = die->die_symbol; |
7373 | if (oldsym) | |
881c6935 | 7374 | { |
703ad42b | 7375 | tmp = alloca (strlen (oldsym) + 24); |
2ad9852d | 7376 | |
cc0017a9 | 7377 | sprintf (tmp, ".gnu.linkonce.wi.%s", oldsym); |
ce1cc601 | 7378 | secname = tmp; |
881c6935 | 7379 | die->die_symbol = NULL; |
d6b5193b | 7380 | switch_to_section (get_section (secname, SECTION_DEBUG, NULL)); |
881c6935 JM |
7381 | } |
7382 | else | |
d6b5193b | 7383 | switch_to_section (debug_info_section); |
881c6935 JM |
7384 | |
7385 | /* Output debugging information. */ | |
881c6935 JM |
7386 | output_compilation_unit_header (); |
7387 | output_die (die); | |
7388 | ||
1bfb5f8f JM |
7389 | /* Leave the marks on the main CU, so we can check them in |
7390 | output_pubnames. */ | |
cc0017a9 ZD |
7391 | if (oldsym) |
7392 | { | |
7393 | unmark_dies (die); | |
7394 | die->die_symbol = oldsym; | |
7395 | } | |
881c6935 JM |
7396 | } |
7397 | ||
721a8ac5 | 7398 | /* Return the DWARF2/3 pubname associated with a decl. */ |
a1d7ffe3 | 7399 | |
d560ee52 | 7400 | static const char * |
7080f735 | 7401 | dwarf2_name (tree decl, int scope) |
a1d7ffe3 | 7402 | { |
721a8ac5 | 7403 | return lang_hooks.dwarf_name (decl, scope ? 1 : 0); |
a1d7ffe3 JM |
7404 | } |
7405 | ||
d291dd49 | 7406 | /* Add a new entry to .debug_pubnames if appropriate. */ |
71dfc51f | 7407 | |
d291dd49 | 7408 | static void |
7080f735 | 7409 | add_pubname (tree decl, dw_die_ref die) |
d291dd49 | 7410 | { |
89708594 | 7411 | pubname_entry e; |
d291dd49 JM |
7412 | |
7413 | if (! TREE_PUBLIC (decl)) | |
7414 | return; | |
7415 | ||
89708594 CT |
7416 | e.die = die; |
7417 | e.name = xstrdup (dwarf2_name (decl, 1)); | |
7418 | VEC_safe_push (pubname_entry, gc, pubname_table, &e); | |
7419 | } | |
7420 | ||
7421 | /* Add a new entry to .debug_pubtypes if appropriate. */ | |
7422 | ||
7423 | static void | |
7424 | add_pubtype (tree decl, dw_die_ref die) | |
7425 | { | |
7426 | pubname_entry e; | |
7427 | ||
7428 | e.name = NULL; | |
7429 | if ((TREE_PUBLIC (decl) | |
7430 | || die->die_parent == comp_unit_die) | |
7431 | && (die->die_tag == DW_TAG_typedef || COMPLETE_TYPE_P (decl))) | |
d291dd49 | 7432 | { |
89708594 CT |
7433 | e.die = die; |
7434 | if (TYPE_P (decl)) | |
7435 | { | |
7436 | if (TYPE_NAME (decl)) | |
7437 | { | |
7438 | if (TREE_CODE (TYPE_NAME (decl)) == IDENTIFIER_NODE) | |
e01e0201 | 7439 | e.name = IDENTIFIER_POINTER (TYPE_NAME (decl)); |
89708594 CT |
7440 | else if (TREE_CODE (TYPE_NAME (decl)) == TYPE_DECL |
7441 | && DECL_NAME (TYPE_NAME (decl))) | |
e01e0201 | 7442 | e.name = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (decl))); |
2878ea73 | 7443 | else |
89708594 CT |
7444 | e.name = xstrdup ((const char *) get_AT_string (die, DW_AT_name)); |
7445 | } | |
7446 | } | |
2878ea73 | 7447 | else |
89708594 | 7448 | e.name = xstrdup (dwarf2_name (decl, 1)); |
71dfc51f | 7449 | |
89708594 CT |
7450 | /* If we don't have a name for the type, there's no point in adding |
7451 | it to the table. */ | |
7452 | if (e.name && e.name[0] != '\0') | |
7453 | VEC_safe_push (pubname_entry, gc, pubtype_table, &e); | |
7454 | } | |
d291dd49 JM |
7455 | } |
7456 | ||
a3f97cbb | 7457 | /* Output the public names table used to speed up access to externally |
89708594 | 7458 | visible names; or the public types table used to find type definitions. */ |
71dfc51f | 7459 | |
a3f97cbb | 7460 | static void |
89708594 | 7461 | output_pubnames (VEC (pubname_entry, gc) * names) |
a3f97cbb | 7462 | { |
b3694847 | 7463 | unsigned i; |
89708594 CT |
7464 | unsigned long pubnames_length = size_of_pubnames (names); |
7465 | pubname_ref pub; | |
71dfc51f | 7466 | |
9eb0ef7a KB |
7467 | if (DWARF_INITIAL_LENGTH_SIZE - DWARF_OFFSET_SIZE == 4) |
7468 | dw2_asm_output_data (4, 0xffffffff, | |
7469 | "Initial length escape value indicating 64-bit DWARF extension"); | |
89708594 CT |
7470 | if (names == pubname_table) |
7471 | dw2_asm_output_data (DWARF_OFFSET_SIZE, pubnames_length, | |
7472 | "Length of Public Names Info"); | |
7473 | else | |
7474 | dw2_asm_output_data (DWARF_OFFSET_SIZE, pubnames_length, | |
7475 | "Length of Public Type Names Info"); | |
2e4b9b8c | 7476 | dw2_asm_output_data (2, DWARF_VERSION, "DWARF Version"); |
2e4b9b8c | 7477 | dw2_asm_output_offset (DWARF_OFFSET_SIZE, debug_info_section_label, |
192d0f89 | 7478 | debug_info_section, |
2e4b9b8c | 7479 | "Offset of Compilation Unit Info"); |
2e4b9b8c RH |
7480 | dw2_asm_output_data (DWARF_OFFSET_SIZE, next_die_offset, |
7481 | "Compilation Unit Length"); | |
71dfc51f | 7482 | |
89708594 | 7483 | for (i = 0; VEC_iterate (pubname_entry, names, i, pub); i++) |
a3f97cbb | 7484 | { |
2878ea73 | 7485 | /* We shouldn't see pubnames for DIEs outside of the main CU. */ |
89708594 CT |
7486 | if (names == pubname_table) |
7487 | gcc_assert (pub->die->die_mark); | |
881c6935 | 7488 | |
89708594 CT |
7489 | if (names != pubtype_table |
7490 | || pub->die->die_offset != 0 | |
7491 | || !flag_eliminate_unused_debug_types) | |
7492 | { | |
7493 | dw2_asm_output_data (DWARF_OFFSET_SIZE, pub->die->die_offset, | |
7494 | "DIE offset"); | |
71dfc51f | 7495 | |
89708594 CT |
7496 | dw2_asm_output_nstring (pub->name, -1, "external name"); |
7497 | } | |
a3f97cbb | 7498 | } |
71dfc51f | 7499 | |
2e4b9b8c | 7500 | dw2_asm_output_data (DWARF_OFFSET_SIZE, 0, NULL); |
a3f97cbb JW |
7501 | } |
7502 | ||
d291dd49 | 7503 | /* Add a new entry to .debug_aranges if appropriate. */ |
71dfc51f | 7504 | |
d291dd49 | 7505 | static void |
7080f735 | 7506 | add_arange (tree decl, dw_die_ref die) |
d291dd49 JM |
7507 | { |
7508 | if (! DECL_SECTION_NAME (decl)) | |
7509 | return; | |
7510 | ||
7511 | if (arange_table_in_use == arange_table_allocated) | |
7512 | { | |
7513 | arange_table_allocated += ARANGE_TABLE_INCREMENT; | |
7080f735 AJ |
7514 | arange_table = ggc_realloc (arange_table, |
7515 | (arange_table_allocated | |
17211ab5 GK |
7516 | * sizeof (dw_die_ref))); |
7517 | memset (arange_table + arange_table_in_use, 0, | |
7518 | ARANGE_TABLE_INCREMENT * sizeof (dw_die_ref)); | |
d291dd49 | 7519 | } |
71dfc51f | 7520 | |
d291dd49 JM |
7521 | arange_table[arange_table_in_use++] = die; |
7522 | } | |
7523 | ||
a3f97cbb JW |
7524 | /* Output the information that goes into the .debug_aranges table. |
7525 | Namely, define the beginning and ending address range of the | |
7526 | text section generated for this compilation unit. */ | |
71dfc51f | 7527 | |
a3f97cbb | 7528 | static void |
7080f735 | 7529 | output_aranges (void) |
a3f97cbb | 7530 | { |
b3694847 SS |
7531 | unsigned i; |
7532 | unsigned long aranges_length = size_of_aranges (); | |
71dfc51f | 7533 | |
9eb0ef7a KB |
7534 | if (DWARF_INITIAL_LENGTH_SIZE - DWARF_OFFSET_SIZE == 4) |
7535 | dw2_asm_output_data (4, 0xffffffff, | |
7536 | "Initial length escape value indicating 64-bit DWARF extension"); | |
2e4b9b8c RH |
7537 | dw2_asm_output_data (DWARF_OFFSET_SIZE, aranges_length, |
7538 | "Length of Address Ranges Info"); | |
2e4b9b8c | 7539 | dw2_asm_output_data (2, DWARF_VERSION, "DWARF Version"); |
2e4b9b8c | 7540 | dw2_asm_output_offset (DWARF_OFFSET_SIZE, debug_info_section_label, |
192d0f89 | 7541 | debug_info_section, |
2e4b9b8c | 7542 | "Offset of Compilation Unit Info"); |
2e4b9b8c | 7543 | dw2_asm_output_data (1, DWARF2_ADDR_SIZE, "Size of Address"); |
2e4b9b8c | 7544 | dw2_asm_output_data (1, 0, "Size of Segment Descriptor"); |
71dfc51f | 7545 | |
262b6384 SC |
7546 | /* We need to align to twice the pointer size here. */ |
7547 | if (DWARF_ARANGES_PAD_SIZE) | |
7548 | { | |
2e4b9b8c | 7549 | /* Pad using a 2 byte words so that padding is correct for any |
73c68f61 | 7550 | pointer size. */ |
2e4b9b8c RH |
7551 | dw2_asm_output_data (2, 0, "Pad to %d byte boundary", |
7552 | 2 * DWARF2_ADDR_SIZE); | |
770ca8c6 | 7553 | for (i = 2; i < (unsigned) DWARF_ARANGES_PAD_SIZE; i += 2) |
2e4b9b8c | 7554 | dw2_asm_output_data (2, 0, NULL); |
262b6384 | 7555 | } |
71dfc51f | 7556 | |
8e7fa2c8 | 7557 | dw2_asm_output_addr (DWARF2_ADDR_SIZE, text_section_label, "Address"); |
c7466dee CT |
7558 | dw2_asm_output_delta (DWARF2_ADDR_SIZE, text_end_label, |
7559 | text_section_label, "Length"); | |
7560 | if (flag_reorder_blocks_and_partition) | |
7561 | { | |
2878ea73 | 7562 | dw2_asm_output_addr (DWARF2_ADDR_SIZE, cold_text_section_label, |
c7466dee CT |
7563 | "Address"); |
7564 | dw2_asm_output_delta (DWARF2_ADDR_SIZE, cold_end_label, | |
7565 | cold_text_section_label, "Length"); | |
7566 | } | |
71dfc51f | 7567 | |
2ad9852d | 7568 | for (i = 0; i < arange_table_in_use; i++) |
d291dd49 | 7569 | { |
e689ae67 | 7570 | dw_die_ref die = arange_table[i]; |
71dfc51f | 7571 | |
881c6935 | 7572 | /* We shouldn't see aranges for DIEs outside of the main CU. */ |
ced3f397 | 7573 | gcc_assert (die->die_mark); |
881c6935 | 7574 | |
e689ae67 | 7575 | if (die->die_tag == DW_TAG_subprogram) |
2e4b9b8c | 7576 | { |
8e7fa2c8 | 7577 | dw2_asm_output_addr (DWARF2_ADDR_SIZE, get_AT_low_pc (die), |
173bf5be | 7578 | "Address"); |
2e4b9b8c RH |
7579 | dw2_asm_output_delta (DWARF2_ADDR_SIZE, get_AT_hi_pc (die), |
7580 | get_AT_low_pc (die), "Length"); | |
7581 | } | |
d291dd49 | 7582 | else |
a1d7ffe3 | 7583 | { |
e689ae67 JM |
7584 | /* A static variable; extract the symbol from DW_AT_location. |
7585 | Note that this code isn't currently hit, as we only emit | |
7586 | aranges for functions (jason 9/23/99). */ | |
e689ae67 JM |
7587 | dw_attr_ref a = get_AT (die, DW_AT_location); |
7588 | dw_loc_descr_ref loc; | |
2ad9852d | 7589 | |
ced3f397 | 7590 | gcc_assert (a && AT_class (a) == dw_val_class_loc); |
e689ae67 | 7591 | |
a96c67ec | 7592 | loc = AT_loc (a); |
ced3f397 | 7593 | gcc_assert (loc->dw_loc_opc == DW_OP_addr); |
e689ae67 | 7594 | |
2e4b9b8c RH |
7595 | dw2_asm_output_addr_rtx (DWARF2_ADDR_SIZE, |
7596 | loc->dw_loc_oprnd1.v.val_addr, "Address"); | |
7597 | dw2_asm_output_data (DWARF2_ADDR_SIZE, | |
7598 | get_AT_unsigned (die, DW_AT_byte_size), | |
7599 | "Length"); | |
a1d7ffe3 | 7600 | } |
d291dd49 | 7601 | } |
71dfc51f | 7602 | |
a3f97cbb | 7603 | /* Output the terminator words. */ |
2e4b9b8c RH |
7604 | dw2_asm_output_data (DWARF2_ADDR_SIZE, 0, NULL); |
7605 | dw2_asm_output_data (DWARF2_ADDR_SIZE, 0, NULL); | |
a3f97cbb JW |
7606 | } |
7607 | ||
a20612aa RH |
7608 | /* Add a new entry to .debug_ranges. Return the offset at which it |
7609 | was placed. */ | |
7610 | ||
7611 | static unsigned int | |
0435c1d5 | 7612 | add_ranges_num (int num) |
a20612aa RH |
7613 | { |
7614 | unsigned int in_use = ranges_table_in_use; | |
7615 | ||
7616 | if (in_use == ranges_table_allocated) | |
7617 | { | |
7618 | ranges_table_allocated += RANGES_TABLE_INCREMENT; | |
703ad42b KG |
7619 | ranges_table |
7620 | = ggc_realloc (ranges_table, (ranges_table_allocated | |
7621 | * sizeof (struct dw_ranges_struct))); | |
17211ab5 GK |
7622 | memset (ranges_table + ranges_table_in_use, 0, |
7623 | RANGES_TABLE_INCREMENT * sizeof (struct dw_ranges_struct)); | |
a20612aa RH |
7624 | } |
7625 | ||
0435c1d5 | 7626 | ranges_table[in_use].num = num; |
a20612aa RH |
7627 | ranges_table_in_use = in_use + 1; |
7628 | ||
7629 | return in_use * 2 * DWARF2_ADDR_SIZE; | |
7630 | } | |
7631 | ||
0435c1d5 AO |
7632 | /* Add a new entry to .debug_ranges corresponding to a block, or a |
7633 | range terminator if BLOCK is NULL. */ | |
7634 | ||
7635 | static unsigned int | |
7636 | add_ranges (tree block) | |
7637 | { | |
7638 | return add_ranges_num (block ? BLOCK_NUMBER (block) : 0); | |
7639 | } | |
7640 | ||
7641 | /* Add a new entry to .debug_ranges corresponding to a pair of | |
7642 | labels. */ | |
7643 | ||
7644 | static unsigned int | |
7645 | add_ranges_by_labels (const char *begin, const char *end) | |
7646 | { | |
7647 | unsigned int in_use = ranges_by_label_in_use; | |
7648 | ||
7649 | if (in_use == ranges_by_label_allocated) | |
7650 | { | |
7651 | ranges_by_label_allocated += RANGES_TABLE_INCREMENT; | |
7652 | ranges_by_label | |
7653 | = ggc_realloc (ranges_by_label, | |
7654 | (ranges_by_label_allocated | |
7655 | * sizeof (struct dw_ranges_by_label_struct))); | |
7656 | memset (ranges_by_label + ranges_by_label_in_use, 0, | |
7657 | RANGES_TABLE_INCREMENT | |
7658 | * sizeof (struct dw_ranges_by_label_struct)); | |
7659 | } | |
7660 | ||
7661 | ranges_by_label[in_use].begin = begin; | |
7662 | ranges_by_label[in_use].end = end; | |
7663 | ranges_by_label_in_use = in_use + 1; | |
7664 | ||
7665 | return add_ranges_num (-(int)in_use - 1); | |
7666 | } | |
7667 | ||
a20612aa | 7668 | static void |
7080f735 | 7669 | output_ranges (void) |
a20612aa | 7670 | { |
b3694847 | 7671 | unsigned i; |
83182544 | 7672 | static const char *const start_fmt = "Offset 0x%x"; |
a20612aa RH |
7673 | const char *fmt = start_fmt; |
7674 | ||
2ad9852d | 7675 | for (i = 0; i < ranges_table_in_use; i++) |
a20612aa | 7676 | { |
0435c1d5 | 7677 | int block_num = ranges_table[i].num; |
a20612aa | 7678 | |
0435c1d5 | 7679 | if (block_num > 0) |
a20612aa RH |
7680 | { |
7681 | char blabel[MAX_ARTIFICIAL_LABEL_BYTES]; | |
7682 | char elabel[MAX_ARTIFICIAL_LABEL_BYTES]; | |
7683 | ||
7684 | ASM_GENERATE_INTERNAL_LABEL (blabel, BLOCK_BEGIN_LABEL, block_num); | |
7685 | ASM_GENERATE_INTERNAL_LABEL (elabel, BLOCK_END_LABEL, block_num); | |
7686 | ||
7687 | /* If all code is in the text section, then the compilation | |
7688 | unit base address defaults to DW_AT_low_pc, which is the | |
7689 | base of the text section. */ | |
1146e682 | 7690 | if (!have_multiple_function_sections) |
a20612aa | 7691 | { |
c7466dee CT |
7692 | dw2_asm_output_delta (DWARF2_ADDR_SIZE, blabel, |
7693 | text_section_label, | |
7694 | fmt, i * 2 * DWARF2_ADDR_SIZE); | |
7695 | dw2_asm_output_delta (DWARF2_ADDR_SIZE, elabel, | |
7696 | text_section_label, NULL); | |
a20612aa | 7697 | } |
2ad9852d | 7698 | |
0435c1d5 AO |
7699 | /* Otherwise, the compilation unit base address is zero, |
7700 | which allows us to use absolute addresses, and not worry | |
7701 | about whether the target supports cross-section | |
7702 | arithmetic. */ | |
a20612aa RH |
7703 | else |
7704 | { | |
7705 | dw2_asm_output_addr (DWARF2_ADDR_SIZE, blabel, | |
7706 | fmt, i * 2 * DWARF2_ADDR_SIZE); | |
7707 | dw2_asm_output_addr (DWARF2_ADDR_SIZE, elabel, NULL); | |
7708 | } | |
7709 | ||
7710 | fmt = NULL; | |
7711 | } | |
0435c1d5 AO |
7712 | |
7713 | /* Negative block_num stands for an index into ranges_by_label. */ | |
7714 | else if (block_num < 0) | |
7715 | { | |
7716 | int lab_idx = - block_num - 1; | |
7717 | ||
7718 | if (!have_multiple_function_sections) | |
7719 | { | |
7720 | gcc_unreachable (); | |
7721 | #if 0 | |
7722 | /* If we ever use add_ranges_by_labels () for a single | |
7723 | function section, all we have to do is to take out | |
7724 | the #if 0 above. */ | |
7725 | dw2_asm_output_delta (DWARF2_ADDR_SIZE, | |
7726 | ranges_by_label[lab_idx].begin, | |
7727 | text_section_label, | |
7728 | fmt, i * 2 * DWARF2_ADDR_SIZE); | |
7729 | dw2_asm_output_delta (DWARF2_ADDR_SIZE, | |
7730 | ranges_by_label[lab_idx].end, | |
7731 | text_section_label, NULL); | |
7732 | #endif | |
7733 | } | |
7734 | else | |
7735 | { | |
7736 | dw2_asm_output_addr (DWARF2_ADDR_SIZE, | |
7737 | ranges_by_label[lab_idx].begin, | |
7738 | fmt, i * 2 * DWARF2_ADDR_SIZE); | |
7739 | dw2_asm_output_addr (DWARF2_ADDR_SIZE, | |
7740 | ranges_by_label[lab_idx].end, | |
7741 | NULL); | |
7742 | } | |
7743 | } | |
a20612aa RH |
7744 | else |
7745 | { | |
7746 | dw2_asm_output_data (DWARF2_ADDR_SIZE, 0, NULL); | |
7747 | dw2_asm_output_data (DWARF2_ADDR_SIZE, 0, NULL); | |
7748 | fmt = start_fmt; | |
7749 | } | |
7750 | } | |
7751 | } | |
0b34cf1e UD |
7752 | |
7753 | /* Data structure containing information about input files. */ | |
7754 | struct file_info | |
7755 | { | |
d5688810 GK |
7756 | const char *path; /* Complete file name. */ |
7757 | const char *fname; /* File name part. */ | |
0b34cf1e | 7758 | int length; /* Length of entire string. */ |
d5688810 | 7759 | struct dwarf_file_data * file_idx; /* Index in input file table. */ |
0b34cf1e UD |
7760 | int dir_idx; /* Index in directory table. */ |
7761 | }; | |
7762 | ||
7763 | /* Data structure containing information about directories with source | |
7764 | files. */ | |
7765 | struct dir_info | |
7766 | { | |
d5688810 | 7767 | const char *path; /* Path including directory name. */ |
0b34cf1e UD |
7768 | int length; /* Path length. */ |
7769 | int prefix; /* Index of directory entry which is a prefix. */ | |
0b34cf1e UD |
7770 | int count; /* Number of files in this directory. */ |
7771 | int dir_idx; /* Index of directory used as base. */ | |
0b34cf1e UD |
7772 | }; |
7773 | ||
7774 | /* Callback function for file_info comparison. We sort by looking at | |
7775 | the directories in the path. */ | |
356b0698 | 7776 | |
0b34cf1e | 7777 | static int |
7080f735 | 7778 | file_info_cmp (const void *p1, const void *p2) |
0b34cf1e UD |
7779 | { |
7780 | const struct file_info *s1 = p1; | |
7781 | const struct file_info *s2 = p2; | |
5f754896 KG |
7782 | const unsigned char *cp1; |
7783 | const unsigned char *cp2; | |
0b34cf1e | 7784 | |
356b0698 RK |
7785 | /* Take care of file names without directories. We need to make sure that |
7786 | we return consistent values to qsort since some will get confused if | |
7787 | we return the same value when identical operands are passed in opposite | |
7788 | orders. So if neither has a directory, return 0 and otherwise return | |
7789 | 1 or -1 depending on which one has the directory. */ | |
7790 | if ((s1->path == s1->fname || s2->path == s2->fname)) | |
7791 | return (s2->path == s2->fname) - (s1->path == s1->fname); | |
0b34cf1e | 7792 | |
5f754896 KG |
7793 | cp1 = (const unsigned char *) s1->path; |
7794 | cp2 = (const unsigned char *) s2->path; | |
0b34cf1e UD |
7795 | |
7796 | while (1) | |
7797 | { | |
7798 | ++cp1; | |
7799 | ++cp2; | |
356b0698 | 7800 | /* Reached the end of the first path? If so, handle like above. */ |
5f754896 KG |
7801 | if ((cp1 == (const unsigned char *) s1->fname) |
7802 | || (cp2 == (const unsigned char *) s2->fname)) | |
7803 | return ((cp2 == (const unsigned char *) s2->fname) | |
7804 | - (cp1 == (const unsigned char *) s1->fname)); | |
0b34cf1e UD |
7805 | |
7806 | /* Character of current path component the same? */ | |
356b0698 | 7807 | else if (*cp1 != *cp2) |
0b34cf1e UD |
7808 | return *cp1 - *cp2; |
7809 | } | |
7810 | } | |
7811 | ||
2878ea73 | 7812 | struct file_name_acquire_data |
d5688810 GK |
7813 | { |
7814 | struct file_info *files; | |
7815 | int used_files; | |
7816 | int max_files; | |
7817 | }; | |
7818 | ||
7819 | /* Traversal function for the hash table. */ | |
7820 | ||
7821 | static int | |
7822 | file_name_acquire (void ** slot, void *data) | |
7823 | { | |
7824 | struct file_name_acquire_data *fnad = data; | |
7825 | struct dwarf_file_data *d = *slot; | |
7826 | struct file_info *fi; | |
7827 | const char *f; | |
7828 | ||
7829 | gcc_assert (fnad->max_files >= d->emitted_number); | |
7830 | ||
7831 | if (! d->emitted_number) | |
7832 | return 1; | |
7833 | ||
7834 | gcc_assert (fnad->max_files != fnad->used_files); | |
7835 | ||
7836 | fi = fnad->files + fnad->used_files++; | |
7837 | ||
7838 | /* Skip all leading "./". */ | |
7839 | f = d->filename; | |
1d2c2b96 | 7840 | while (f[0] == '.' && IS_DIR_SEPARATOR (f[1])) |
d5688810 | 7841 | f += 2; |
2878ea73 | 7842 | |
d5688810 GK |
7843 | /* Create a new array entry. */ |
7844 | fi->path = f; | |
7845 | fi->length = strlen (f); | |
7846 | fi->file_idx = d; | |
2878ea73 | 7847 | |
d5688810 | 7848 | /* Search for the file name part. */ |
1d2c2b96 NF |
7849 | f = strrchr (f, DIR_SEPARATOR); |
7850 | #if defined (DIR_SEPARATOR_2) | |
7851 | { | |
2310f1f8 | 7852 | char *g = strrchr (fi->path, DIR_SEPARATOR_2); |
1d2c2b96 NF |
7853 | |
7854 | if (g != NULL) | |
7855 | { | |
7856 | if (f == NULL || f < g) | |
7857 | f = g; | |
7858 | } | |
7859 | } | |
7860 | #endif | |
7861 | ||
d5688810 GK |
7862 | fi->fname = f == NULL ? fi->path : f + 1; |
7863 | return 1; | |
7864 | } | |
7865 | ||
0b34cf1e UD |
7866 | /* Output the directory table and the file name table. We try to minimize |
7867 | the total amount of memory needed. A heuristic is used to avoid large | |
7868 | slowdowns with many input files. */ | |
2ad9852d | 7869 | |
0b34cf1e | 7870 | static void |
7080f735 | 7871 | output_file_names (void) |
0b34cf1e | 7872 | { |
d5688810 GK |
7873 | struct file_name_acquire_data fnad; |
7874 | int numfiles; | |
0b34cf1e UD |
7875 | struct file_info *files; |
7876 | struct dir_info *dirs; | |
7877 | int *saved; | |
7878 | int *savehere; | |
7879 | int *backmap; | |
d5688810 | 7880 | int ndirs; |
0b34cf1e | 7881 | int idx_offset; |
d5688810 | 7882 | int i; |
0b34cf1e UD |
7883 | int idx; |
7884 | ||
d5688810 | 7885 | if (!last_emitted_file) |
f0b886ab UW |
7886 | { |
7887 | dw2_asm_output_data (1, 0, "End directory table"); | |
7888 | dw2_asm_output_data (1, 0, "End file name table"); | |
7889 | return; | |
7890 | } | |
7891 | ||
d5688810 | 7892 | numfiles = last_emitted_file->emitted_number; |
0b34cf1e | 7893 | |
d5688810 GK |
7894 | /* Allocate the various arrays we need. */ |
7895 | files = alloca (numfiles * sizeof (struct file_info)); | |
7896 | dirs = alloca (numfiles * sizeof (struct dir_info)); | |
0b34cf1e | 7897 | |
d5688810 GK |
7898 | fnad.files = files; |
7899 | fnad.used_files = 0; | |
7900 | fnad.max_files = numfiles; | |
7901 | htab_traverse (file_table, file_name_acquire, &fnad); | |
7902 | gcc_assert (fnad.used_files == fnad.max_files); | |
2ad9852d | 7903 | |
d5688810 | 7904 | qsort (files, numfiles, sizeof (files[0]), file_info_cmp); |
0b34cf1e UD |
7905 | |
7906 | /* Find all the different directories used. */ | |
d5688810 GK |
7907 | dirs[0].path = files[0].path; |
7908 | dirs[0].length = files[0].fname - files[0].path; | |
0b34cf1e | 7909 | dirs[0].prefix = -1; |
0b34cf1e UD |
7910 | dirs[0].count = 1; |
7911 | dirs[0].dir_idx = 0; | |
d5688810 | 7912 | files[0].dir_idx = 0; |
0b34cf1e UD |
7913 | ndirs = 1; |
7914 | ||
d5688810 | 7915 | for (i = 1; i < numfiles; i++) |
0b34cf1e UD |
7916 | if (files[i].fname - files[i].path == dirs[ndirs - 1].length |
7917 | && memcmp (dirs[ndirs - 1].path, files[i].path, | |
7918 | dirs[ndirs - 1].length) == 0) | |
7919 | { | |
7920 | /* Same directory as last entry. */ | |
7921 | files[i].dir_idx = ndirs - 1; | |
0b34cf1e UD |
7922 | ++dirs[ndirs - 1].count; |
7923 | } | |
7924 | else | |
7925 | { | |
d5688810 | 7926 | int j; |
0b34cf1e UD |
7927 | |
7928 | /* This is a new directory. */ | |
7929 | dirs[ndirs].path = files[i].path; | |
7930 | dirs[ndirs].length = files[i].fname - files[i].path; | |
0b34cf1e UD |
7931 | dirs[ndirs].count = 1; |
7932 | dirs[ndirs].dir_idx = ndirs; | |
0b34cf1e UD |
7933 | files[i].dir_idx = ndirs; |
7934 | ||
7935 | /* Search for a prefix. */ | |
981975b6 | 7936 | dirs[ndirs].prefix = -1; |
2ad9852d | 7937 | for (j = 0; j < ndirs; j++) |
981975b6 RH |
7938 | if (dirs[j].length < dirs[ndirs].length |
7939 | && dirs[j].length > 1 | |
7940 | && (dirs[ndirs].prefix == -1 | |
7941 | || dirs[j].length > dirs[dirs[ndirs].prefix].length) | |
7942 | && memcmp (dirs[j].path, dirs[ndirs].path, dirs[j].length) == 0) | |
7943 | dirs[ndirs].prefix = j; | |
0b34cf1e UD |
7944 | |
7945 | ++ndirs; | |
7946 | } | |
7947 | ||
2ad9852d RK |
7948 | /* Now to the actual work. We have to find a subset of the directories which |
7949 | allow expressing the file name using references to the directory table | |
7950 | with the least amount of characters. We do not do an exhaustive search | |
7951 | where we would have to check out every combination of every single | |
7952 | possible prefix. Instead we use a heuristic which provides nearly optimal | |
7953 | results in most cases and never is much off. */ | |
703ad42b KG |
7954 | saved = alloca (ndirs * sizeof (int)); |
7955 | savehere = alloca (ndirs * sizeof (int)); | |
0b34cf1e UD |
7956 | |
7957 | memset (saved, '\0', ndirs * sizeof (saved[0])); | |
2ad9852d | 7958 | for (i = 0; i < ndirs; i++) |
0b34cf1e | 7959 | { |
d5688810 | 7960 | int j; |
0b34cf1e UD |
7961 | int total; |
7962 | ||
2ad9852d RK |
7963 | /* We can always save some space for the current directory. But this |
7964 | does not mean it will be enough to justify adding the directory. */ | |
0b34cf1e UD |
7965 | savehere[i] = dirs[i].length; |
7966 | total = (savehere[i] - saved[i]) * dirs[i].count; | |
7967 | ||
2ad9852d | 7968 | for (j = i + 1; j < ndirs; j++) |
0b34cf1e UD |
7969 | { |
7970 | savehere[j] = 0; | |
0b34cf1e UD |
7971 | if (saved[j] < dirs[i].length) |
7972 | { | |
7973 | /* Determine whether the dirs[i] path is a prefix of the | |
7974 | dirs[j] path. */ | |
7975 | int k; | |
7976 | ||
981975b6 | 7977 | k = dirs[j].prefix; |
c4274b22 | 7978 | while (k != -1 && k != (int) i) |
981975b6 RH |
7979 | k = dirs[k].prefix; |
7980 | ||
c4274b22 | 7981 | if (k == (int) i) |
981975b6 | 7982 | { |
d5688810 | 7983 | /* Yes it is. We can possibly save some memory by |
981975b6 RH |
7984 | writing the filenames in dirs[j] relative to |
7985 | dirs[i]. */ | |
7986 | savehere[j] = dirs[i].length; | |
7987 | total += (savehere[j] - saved[j]) * dirs[j].count; | |
7988 | } | |
0b34cf1e UD |
7989 | } |
7990 | } | |
7991 | ||
d5688810 | 7992 | /* Check whether we can save enough to justify adding the dirs[i] |
0b34cf1e UD |
7993 | directory. */ |
7994 | if (total > dirs[i].length + 1) | |
7995 | { | |
981975b6 | 7996 | /* It's worthwhile adding. */ |
c26fbbca | 7997 | for (j = i; j < ndirs; j++) |
0b34cf1e UD |
7998 | if (savehere[j] > 0) |
7999 | { | |
8000 | /* Remember how much we saved for this directory so far. */ | |
8001 | saved[j] = savehere[j]; | |
8002 | ||
8003 | /* Remember the prefix directory. */ | |
8004 | dirs[j].dir_idx = i; | |
8005 | } | |
8006 | } | |
8007 | } | |
8008 | ||
d5688810 | 8009 | /* Emit the directory name table. */ |
0b34cf1e | 8010 | idx = 1; |
e57cabac | 8011 | idx_offset = dirs[0].length > 0 ? 1 : 0; |
2ad9852d | 8012 | for (i = 1 - idx_offset; i < ndirs; i++) |
d5688810 GK |
8013 | dw2_asm_output_nstring (dirs[i].path, dirs[i].length - 1, |
8014 | "Directory Entry: 0x%x", i + idx_offset); | |
2ad9852d | 8015 | |
2e4b9b8c RH |
8016 | dw2_asm_output_data (1, 0, "End directory table"); |
8017 | ||
d5688810 GK |
8018 | /* We have to emit them in the order of emitted_number since that's |
8019 | used in the debug info generation. To do this efficiently we | |
8020 | generate a back-mapping of the indices first. */ | |
8021 | backmap = alloca (numfiles * sizeof (int)); | |
8022 | for (i = 0; i < numfiles; i++) | |
8023 | backmap[files[i].file_idx->emitted_number - 1] = i; | |
0b34cf1e UD |
8024 | |
8025 | /* Now write all the file names. */ | |
d5688810 | 8026 | for (i = 0; i < numfiles; i++) |
0b34cf1e UD |
8027 | { |
8028 | int file_idx = backmap[i]; | |
8029 | int dir_idx = dirs[files[file_idx].dir_idx].dir_idx; | |
8030 | ||
2e4b9b8c | 8031 | dw2_asm_output_nstring (files[file_idx].path + dirs[dir_idx].length, -1, |
d5688810 | 8032 | "File Entry: 0x%x", (unsigned) i + 1); |
0b34cf1e UD |
8033 | |
8034 | /* Include directory index. */ | |
d5688810 | 8035 | dw2_asm_output_data_uleb128 (dir_idx + idx_offset, NULL); |
0b34cf1e UD |
8036 | |
8037 | /* Modification time. */ | |
2e4b9b8c | 8038 | dw2_asm_output_data_uleb128 (0, NULL); |
0b34cf1e UD |
8039 | |
8040 | /* File length in bytes. */ | |
2e4b9b8c | 8041 | dw2_asm_output_data_uleb128 (0, NULL); |
0b34cf1e | 8042 | } |
2ad9852d | 8043 | |
2e4b9b8c | 8044 | dw2_asm_output_data (1, 0, "End file name table"); |
0b34cf1e UD |
8045 | } |
8046 | ||
8047 | ||
a3f97cbb | 8048 | /* Output the source line number correspondence information. This |
14a774a9 | 8049 | information goes into the .debug_line section. */ |
71dfc51f | 8050 | |
a3f97cbb | 8051 | static void |
7080f735 | 8052 | output_line_info (void) |
a3f97cbb | 8053 | { |
981975b6 | 8054 | char l1[20], l2[20], p1[20], p2[20]; |
a3f97cbb JW |
8055 | char line_label[MAX_ARTIFICIAL_LABEL_BYTES]; |
8056 | char prev_line_label[MAX_ARTIFICIAL_LABEL_BYTES]; | |
b3694847 SS |
8057 | unsigned opc; |
8058 | unsigned n_op_args; | |
8059 | unsigned long lt_index; | |
8060 | unsigned long current_line; | |
8061 | long line_offset; | |
8062 | long line_delta; | |
8063 | unsigned long current_file; | |
8064 | unsigned long function; | |
71dfc51f | 8065 | |
2e4b9b8c RH |
8066 | ASM_GENERATE_INTERNAL_LABEL (l1, LINE_NUMBER_BEGIN_LABEL, 0); |
8067 | ASM_GENERATE_INTERNAL_LABEL (l2, LINE_NUMBER_END_LABEL, 0); | |
981975b6 RH |
8068 | ASM_GENERATE_INTERNAL_LABEL (p1, LN_PROLOG_AS_LABEL, 0); |
8069 | ASM_GENERATE_INTERNAL_LABEL (p2, LN_PROLOG_END_LABEL, 0); | |
71dfc51f | 8070 | |
9eb0ef7a KB |
8071 | if (DWARF_INITIAL_LENGTH_SIZE - DWARF_OFFSET_SIZE == 4) |
8072 | dw2_asm_output_data (4, 0xffffffff, | |
8073 | "Initial length escape value indicating 64-bit DWARF extension"); | |
2e4b9b8c RH |
8074 | dw2_asm_output_delta (DWARF_OFFSET_SIZE, l2, l1, |
8075 | "Length of Source Line Info"); | |
8076 | ASM_OUTPUT_LABEL (asm_out_file, l1); | |
71dfc51f | 8077 | |
2e4b9b8c | 8078 | dw2_asm_output_data (2, DWARF_VERSION, "DWARF Version"); |
981975b6 RH |
8079 | dw2_asm_output_delta (DWARF_OFFSET_SIZE, p2, p1, "Prolog Length"); |
8080 | ASM_OUTPUT_LABEL (asm_out_file, p1); | |
71dfc51f | 8081 | |
c1a046e5 TT |
8082 | /* Define the architecture-dependent minimum instruction length (in |
8083 | bytes). In this implementation of DWARF, this field is used for | |
8084 | information purposes only. Since GCC generates assembly language, | |
8085 | we have no a priori knowledge of how many instruction bytes are | |
8086 | generated for each source line, and therefore can use only the | |
8087 | DW_LNE_set_address and DW_LNS_fixed_advance_pc line information | |
8088 | commands. Accordingly, we fix this as `1', which is "correct | |
8089 | enough" for all architectures, and don't let the target override. */ | |
8090 | dw2_asm_output_data (1, 1, | |
2e4b9b8c | 8091 | "Minimum Instruction Length"); |
c1a046e5 | 8092 | |
2e4b9b8c RH |
8093 | dw2_asm_output_data (1, DWARF_LINE_DEFAULT_IS_STMT_START, |
8094 | "Default is_stmt_start flag"); | |
2e4b9b8c RH |
8095 | dw2_asm_output_data (1, DWARF_LINE_BASE, |
8096 | "Line Base Value (Special Opcodes)"); | |
2e4b9b8c RH |
8097 | dw2_asm_output_data (1, DWARF_LINE_RANGE, |
8098 | "Line Range Value (Special Opcodes)"); | |
2e4b9b8c RH |
8099 | dw2_asm_output_data (1, DWARF_LINE_OPCODE_BASE, |
8100 | "Special Opcode Base"); | |
71dfc51f | 8101 | |
2ad9852d | 8102 | for (opc = 1; opc < DWARF_LINE_OPCODE_BASE; opc++) |
a3f97cbb JW |
8103 | { |
8104 | switch (opc) | |
8105 | { | |
8106 | case DW_LNS_advance_pc: | |
8107 | case DW_LNS_advance_line: | |
8108 | case DW_LNS_set_file: | |
8109 | case DW_LNS_set_column: | |
8110 | case DW_LNS_fixed_advance_pc: | |
8111 | n_op_args = 1; | |
8112 | break; | |
8113 | default: | |
8114 | n_op_args = 0; | |
8115 | break; | |
8116 | } | |
2e4b9b8c RH |
8117 | |
8118 | dw2_asm_output_data (1, n_op_args, "opcode: 0x%x has %d args", | |
8119 | opc, n_op_args); | |
a3f97cbb | 8120 | } |
71dfc51f | 8121 | |
0b34cf1e UD |
8122 | /* Write out the information about the files we use. */ |
8123 | output_file_names (); | |
981975b6 | 8124 | ASM_OUTPUT_LABEL (asm_out_file, p2); |
a3f97cbb | 8125 | |
2f22d404 JM |
8126 | /* We used to set the address register to the first location in the text |
8127 | section here, but that didn't accomplish anything since we already | |
8128 | have a line note for the opening brace of the first function. */ | |
a3f97cbb JW |
8129 | |
8130 | /* Generate the line number to PC correspondence table, encoded as | |
8131 | a series of state machine operations. */ | |
8132 | current_file = 1; | |
8133 | current_line = 1; | |
c7466dee | 8134 | |
c543ca49 | 8135 | if (cfun && in_cold_section_p) |
c7466dee | 8136 | strcpy (prev_line_label, cfun->cold_section_label); |
87c8b4be CT |
8137 | else |
8138 | strcpy (prev_line_label, text_section_label); | |
a3f97cbb JW |
8139 | for (lt_index = 1; lt_index < line_info_table_in_use; ++lt_index) |
8140 | { | |
b3694847 | 8141 | dw_line_info_ref line_info = &line_info_table[lt_index]; |
2f22d404 | 8142 | |
10a11b75 JM |
8143 | #if 0 |
8144 | /* Disable this optimization for now; GDB wants to see two line notes | |
8145 | at the beginning of a function so it can find the end of the | |
8146 | prologue. */ | |
8147 | ||
2f22d404 | 8148 | /* Don't emit anything for redundant notes. Just updating the |
73c68f61 SS |
8149 | address doesn't accomplish anything, because we already assume |
8150 | that anything after the last address is this line. */ | |
2f22d404 JM |
8151 | if (line_info->dw_line_num == current_line |
8152 | && line_info->dw_file_num == current_file) | |
8153 | continue; | |
10a11b75 | 8154 | #endif |
71dfc51f | 8155 | |
2e4b9b8c RH |
8156 | /* Emit debug info for the address of the current line. |
8157 | ||
8158 | Unfortunately, we have little choice here currently, and must always | |
2ad9852d | 8159 | use the most general form. GCC does not know the address delta |
2e4b9b8c RH |
8160 | itself, so we can't use DW_LNS_advance_pc. Many ports do have length |
8161 | attributes which will give an upper bound on the address range. We | |
8162 | could perhaps use length attributes to determine when it is safe to | |
8163 | use DW_LNS_fixed_advance_pc. */ | |
8164 | ||
5c90448c | 8165 | ASM_GENERATE_INTERNAL_LABEL (line_label, LINE_CODE_LABEL, lt_index); |
f19a6894 JW |
8166 | if (0) |
8167 | { | |
8168 | /* This can handle deltas up to 0xffff. This takes 3 bytes. */ | |
2e4b9b8c RH |
8169 | dw2_asm_output_data (1, DW_LNS_fixed_advance_pc, |
8170 | "DW_LNS_fixed_advance_pc"); | |
8171 | dw2_asm_output_delta (2, line_label, prev_line_label, NULL); | |
f19a6894 JW |
8172 | } |
8173 | else | |
8174 | { | |
a1a4189d | 8175 | /* This can handle any delta. This takes |
73c68f61 | 8176 | 4+DWARF2_ADDR_SIZE bytes. */ |
2e4b9b8c RH |
8177 | dw2_asm_output_data (1, 0, "DW_LNE_set_address"); |
8178 | dw2_asm_output_data_uleb128 (1 + DWARF2_ADDR_SIZE, NULL); | |
8179 | dw2_asm_output_data (1, DW_LNE_set_address, NULL); | |
8e7fa2c8 | 8180 | dw2_asm_output_addr (DWARF2_ADDR_SIZE, line_label, NULL); |
f19a6894 | 8181 | } |
2ad9852d | 8182 | |
f19a6894 JW |
8183 | strcpy (prev_line_label, line_label); |
8184 | ||
8185 | /* Emit debug info for the source file of the current line, if | |
8186 | different from the previous line. */ | |
a3f97cbb JW |
8187 | if (line_info->dw_file_num != current_file) |
8188 | { | |
8189 | current_file = line_info->dw_file_num; | |
2e4b9b8c | 8190 | dw2_asm_output_data (1, DW_LNS_set_file, "DW_LNS_set_file"); |
d5688810 | 8191 | dw2_asm_output_data_uleb128 (current_file, "%lu", current_file); |
a3f97cbb | 8192 | } |
71dfc51f | 8193 | |
f19a6894 JW |
8194 | /* Emit debug info for the current line number, choosing the encoding |
8195 | that uses the least amount of space. */ | |
2f22d404 | 8196 | if (line_info->dw_line_num != current_line) |
a3f97cbb | 8197 | { |
2f22d404 JM |
8198 | line_offset = line_info->dw_line_num - current_line; |
8199 | line_delta = line_offset - DWARF_LINE_BASE; | |
8200 | current_line = line_info->dw_line_num; | |
8201 | if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1)) | |
2ad9852d RK |
8202 | /* This can handle deltas from -10 to 234, using the current |
8203 | definitions of DWARF_LINE_BASE and DWARF_LINE_RANGE. This | |
8204 | takes 1 byte. */ | |
8205 | dw2_asm_output_data (1, DWARF_LINE_OPCODE_BASE + line_delta, | |
8206 | "line %lu", current_line); | |
2f22d404 JM |
8207 | else |
8208 | { | |
8209 | /* This can handle any delta. This takes at least 4 bytes, | |
8210 | depending on the value being encoded. */ | |
2e4b9b8c RH |
8211 | dw2_asm_output_data (1, DW_LNS_advance_line, |
8212 | "advance to line %lu", current_line); | |
8213 | dw2_asm_output_data_sleb128 (line_offset, NULL); | |
8214 | dw2_asm_output_data (1, DW_LNS_copy, "DW_LNS_copy"); | |
2f22d404 | 8215 | } |
a94dbf2c JM |
8216 | } |
8217 | else | |
2ad9852d RK |
8218 | /* We still need to start a new row, so output a copy insn. */ |
8219 | dw2_asm_output_data (1, DW_LNS_copy, "DW_LNS_copy"); | |
a3f97cbb JW |
8220 | } |
8221 | ||
f19a6894 JW |
8222 | /* Emit debug info for the address of the end of the function. */ |
8223 | if (0) | |
8224 | { | |
2e4b9b8c RH |
8225 | dw2_asm_output_data (1, DW_LNS_fixed_advance_pc, |
8226 | "DW_LNS_fixed_advance_pc"); | |
8227 | dw2_asm_output_delta (2, text_end_label, prev_line_label, NULL); | |
f19a6894 JW |
8228 | } |
8229 | else | |
8230 | { | |
2e4b9b8c RH |
8231 | dw2_asm_output_data (1, 0, "DW_LNE_set_address"); |
8232 | dw2_asm_output_data_uleb128 (1 + DWARF2_ADDR_SIZE, NULL); | |
8233 | dw2_asm_output_data (1, DW_LNE_set_address, NULL); | |
8e7fa2c8 | 8234 | dw2_asm_output_addr (DWARF2_ADDR_SIZE, text_end_label, NULL); |
f19a6894 | 8235 | } |
bdb669cb | 8236 | |
2e4b9b8c RH |
8237 | dw2_asm_output_data (1, 0, "DW_LNE_end_sequence"); |
8238 | dw2_asm_output_data_uleb128 (1, NULL); | |
8239 | dw2_asm_output_data (1, DW_LNE_end_sequence, NULL); | |
e90b62db JM |
8240 | |
8241 | function = 0; | |
8242 | current_file = 1; | |
8243 | current_line = 1; | |
556273e0 | 8244 | for (lt_index = 0; lt_index < separate_line_info_table_in_use;) |
e90b62db | 8245 | { |
b3694847 | 8246 | dw_separate_line_info_ref line_info |
e90b62db | 8247 | = &separate_line_info_table[lt_index]; |
71dfc51f | 8248 | |
10a11b75 | 8249 | #if 0 |
2f22d404 JM |
8250 | /* Don't emit anything for redundant notes. */ |
8251 | if (line_info->dw_line_num == current_line | |
8252 | && line_info->dw_file_num == current_file | |
8253 | && line_info->function == function) | |
8254 | goto cont; | |
10a11b75 | 8255 | #endif |
2f22d404 | 8256 | |
f19a6894 JW |
8257 | /* Emit debug info for the address of the current line. If this is |
8258 | a new function, or the first line of a function, then we need | |
8259 | to handle it differently. */ | |
5c90448c JM |
8260 | ASM_GENERATE_INTERNAL_LABEL (line_label, SEPARATE_LINE_CODE_LABEL, |
8261 | lt_index); | |
e90b62db JM |
8262 | if (function != line_info->function) |
8263 | { | |
8264 | function = line_info->function; | |
71dfc51f | 8265 | |
f9da5064 | 8266 | /* Set the address register to the first line in the function. */ |
2e4b9b8c RH |
8267 | dw2_asm_output_data (1, 0, "DW_LNE_set_address"); |
8268 | dw2_asm_output_data_uleb128 (1 + DWARF2_ADDR_SIZE, NULL); | |
8269 | dw2_asm_output_data (1, DW_LNE_set_address, NULL); | |
8e7fa2c8 | 8270 | dw2_asm_output_addr (DWARF2_ADDR_SIZE, line_label, NULL); |
e90b62db JM |
8271 | } |
8272 | else | |
8273 | { | |
f19a6894 JW |
8274 | /* ??? See the DW_LNS_advance_pc comment above. */ |
8275 | if (0) | |
8276 | { | |
2e4b9b8c RH |
8277 | dw2_asm_output_data (1, DW_LNS_fixed_advance_pc, |
8278 | "DW_LNS_fixed_advance_pc"); | |
8279 | dw2_asm_output_delta (2, line_label, prev_line_label, NULL); | |
f19a6894 JW |
8280 | } |
8281 | else | |
8282 | { | |
2e4b9b8c RH |
8283 | dw2_asm_output_data (1, 0, "DW_LNE_set_address"); |
8284 | dw2_asm_output_data_uleb128 (1 + DWARF2_ADDR_SIZE, NULL); | |
8285 | dw2_asm_output_data (1, DW_LNE_set_address, NULL); | |
8e7fa2c8 | 8286 | dw2_asm_output_addr (DWARF2_ADDR_SIZE, line_label, NULL); |
f19a6894 | 8287 | } |
e90b62db | 8288 | } |
2ad9852d | 8289 | |
f19a6894 | 8290 | strcpy (prev_line_label, line_label); |
71dfc51f | 8291 | |
f19a6894 JW |
8292 | /* Emit debug info for the source file of the current line, if |
8293 | different from the previous line. */ | |
e90b62db JM |
8294 | if (line_info->dw_file_num != current_file) |
8295 | { | |
8296 | current_file = line_info->dw_file_num; | |
2e4b9b8c | 8297 | dw2_asm_output_data (1, DW_LNS_set_file, "DW_LNS_set_file"); |
d5688810 | 8298 | dw2_asm_output_data_uleb128 (current_file, "%lu", current_file); |
e90b62db | 8299 | } |
71dfc51f | 8300 | |
f19a6894 JW |
8301 | /* Emit debug info for the current line number, choosing the encoding |
8302 | that uses the least amount of space. */ | |
e90b62db JM |
8303 | if (line_info->dw_line_num != current_line) |
8304 | { | |
8305 | line_offset = line_info->dw_line_num - current_line; | |
8306 | line_delta = line_offset - DWARF_LINE_BASE; | |
8307 | current_line = line_info->dw_line_num; | |
8308 | if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1)) | |
2e4b9b8c RH |
8309 | dw2_asm_output_data (1, DWARF_LINE_OPCODE_BASE + line_delta, |
8310 | "line %lu", current_line); | |
e90b62db JM |
8311 | else |
8312 | { | |
2e4b9b8c RH |
8313 | dw2_asm_output_data (1, DW_LNS_advance_line, |
8314 | "advance to line %lu", current_line); | |
8315 | dw2_asm_output_data_sleb128 (line_offset, NULL); | |
8316 | dw2_asm_output_data (1, DW_LNS_copy, "DW_LNS_copy"); | |
e90b62db JM |
8317 | } |
8318 | } | |
2f22d404 | 8319 | else |
2e4b9b8c | 8320 | dw2_asm_output_data (1, DW_LNS_copy, "DW_LNS_copy"); |
71dfc51f | 8321 | |
10a11b75 | 8322 | #if 0 |
2f22d404 | 8323 | cont: |
10a11b75 | 8324 | #endif |
2ad9852d RK |
8325 | |
8326 | lt_index++; | |
e90b62db JM |
8327 | |
8328 | /* If we're done with a function, end its sequence. */ | |
8329 | if (lt_index == separate_line_info_table_in_use | |
8330 | || separate_line_info_table[lt_index].function != function) | |
8331 | { | |
8332 | current_file = 1; | |
8333 | current_line = 1; | |
71dfc51f | 8334 | |
f19a6894 | 8335 | /* Emit debug info for the address of the end of the function. */ |
5c90448c | 8336 | ASM_GENERATE_INTERNAL_LABEL (line_label, FUNC_END_LABEL, function); |
f19a6894 JW |
8337 | if (0) |
8338 | { | |
2e4b9b8c RH |
8339 | dw2_asm_output_data (1, DW_LNS_fixed_advance_pc, |
8340 | "DW_LNS_fixed_advance_pc"); | |
8341 | dw2_asm_output_delta (2, line_label, prev_line_label, NULL); | |
f19a6894 JW |
8342 | } |
8343 | else | |
8344 | { | |
2e4b9b8c RH |
8345 | dw2_asm_output_data (1, 0, "DW_LNE_set_address"); |
8346 | dw2_asm_output_data_uleb128 (1 + DWARF2_ADDR_SIZE, NULL); | |
8347 | dw2_asm_output_data (1, DW_LNE_set_address, NULL); | |
8e7fa2c8 | 8348 | dw2_asm_output_addr (DWARF2_ADDR_SIZE, line_label, NULL); |
f19a6894 | 8349 | } |
e90b62db JM |
8350 | |
8351 | /* Output the marker for the end of this sequence. */ | |
2e4b9b8c RH |
8352 | dw2_asm_output_data (1, 0, "DW_LNE_end_sequence"); |
8353 | dw2_asm_output_data_uleb128 (1, NULL); | |
8354 | dw2_asm_output_data (1, DW_LNE_end_sequence, NULL); | |
e90b62db JM |
8355 | } |
8356 | } | |
f19f17e0 JM |
8357 | |
8358 | /* Output the marker for the end of the line number info. */ | |
2e4b9b8c | 8359 | ASM_OUTPUT_LABEL (asm_out_file, l2); |
a3f97cbb JW |
8360 | } |
8361 | \f | |
a3f97cbb JW |
8362 | /* Given a pointer to a tree node for some base type, return a pointer to |
8363 | a DIE that describes the given type. | |
8364 | ||
8365 | This routine must only be called for GCC type nodes that correspond to | |
8366 | Dwarf base (fundamental) types. */ | |
71dfc51f | 8367 | |
a3f97cbb | 8368 | static dw_die_ref |
7080f735 | 8369 | base_type_die (tree type) |
a3f97cbb | 8370 | { |
b3694847 | 8371 | dw_die_ref base_type_result; |
b3694847 | 8372 | enum dwarf_type encoding; |
a3f97cbb | 8373 | |
2ad9852d | 8374 | if (TREE_CODE (type) == ERROR_MARK || TREE_CODE (type) == VOID_TYPE) |
a3f97cbb JW |
8375 | return 0; |
8376 | ||
8377 | switch (TREE_CODE (type)) | |
8378 | { | |
a3f97cbb | 8379 | case INTEGER_TYPE: |
05fa7d54 | 8380 | if (TYPE_STRING_FLAG (type)) |
a3f97cbb | 8381 | { |
8df83eae | 8382 | if (TYPE_UNSIGNED (type)) |
05fa7d54 | 8383 | encoding = DW_ATE_unsigned_char; |
a9d38797 | 8384 | else |
05fa7d54 | 8385 | encoding = DW_ATE_signed_char; |
a3f97cbb | 8386 | } |
05fa7d54 RS |
8387 | else if (TYPE_UNSIGNED (type)) |
8388 | encoding = DW_ATE_unsigned; | |
a9d38797 | 8389 | else |
05fa7d54 | 8390 | encoding = DW_ATE_signed; |
a3f97cbb JW |
8391 | break; |
8392 | ||
8393 | case REAL_TYPE: | |
15ed7b52 JG |
8394 | if (DECIMAL_FLOAT_MODE_P (TYPE_MODE (type))) |
8395 | encoding = DW_ATE_decimal_float; | |
8396 | else | |
8397 | encoding = DW_ATE_float; | |
a3f97cbb JW |
8398 | break; |
8399 | ||
405f63da MM |
8400 | /* Dwarf2 doesn't know anything about complex ints, so use |
8401 | a user defined type for it. */ | |
a3f97cbb | 8402 | case COMPLEX_TYPE: |
405f63da MM |
8403 | if (TREE_CODE (TREE_TYPE (type)) == REAL_TYPE) |
8404 | encoding = DW_ATE_complex_float; | |
8405 | else | |
8406 | encoding = DW_ATE_lo_user; | |
a3f97cbb JW |
8407 | break; |
8408 | ||
8409 | case BOOLEAN_TYPE: | |
a9d38797 JM |
8410 | /* GNU FORTRAN/Ada/C++ BOOLEAN type. */ |
8411 | encoding = DW_ATE_boolean; | |
a3f97cbb JW |
8412 | break; |
8413 | ||
8414 | default: | |
2ad9852d | 8415 | /* No other TREE_CODEs are Dwarf fundamental types. */ |
ced3f397 | 8416 | gcc_unreachable (); |
a3f97cbb JW |
8417 | } |
8418 | ||
54ba1f0d | 8419 | base_type_result = new_die (DW_TAG_base_type, comp_unit_die, type); |
14a774a9 | 8420 | |
7cdfcf60 GK |
8421 | /* This probably indicates a bug. */ |
8422 | if (! TYPE_NAME (type)) | |
8423 | add_name_attribute (base_type_result, "__unknown__"); | |
8424 | ||
a9d38797 | 8425 | add_AT_unsigned (base_type_result, DW_AT_byte_size, |
4e5a8d7b | 8426 | int_size_in_bytes (type)); |
a9d38797 | 8427 | add_AT_unsigned (base_type_result, DW_AT_encoding, encoding); |
a3f97cbb JW |
8428 | |
8429 | return base_type_result; | |
8430 | } | |
8431 | ||
cc2902df | 8432 | /* Given a pointer to an arbitrary ..._TYPE tree node, return nonzero if the |
a3f97cbb | 8433 | given input type is a Dwarf "fundamental" type. Otherwise return null. */ |
71dfc51f RK |
8434 | |
8435 | static inline int | |
7080f735 | 8436 | is_base_type (tree type) |
a3f97cbb JW |
8437 | { |
8438 | switch (TREE_CODE (type)) | |
8439 | { | |
8440 | case ERROR_MARK: | |
8441 | case VOID_TYPE: | |
8442 | case INTEGER_TYPE: | |
8443 | case REAL_TYPE: | |
8444 | case COMPLEX_TYPE: | |
8445 | case BOOLEAN_TYPE: | |
a3f97cbb JW |
8446 | return 1; |
8447 | ||
a3f97cbb JW |
8448 | case ARRAY_TYPE: |
8449 | case RECORD_TYPE: | |
8450 | case UNION_TYPE: | |
8451 | case QUAL_UNION_TYPE: | |
8452 | case ENUMERAL_TYPE: | |
8453 | case FUNCTION_TYPE: | |
8454 | case METHOD_TYPE: | |
8455 | case POINTER_TYPE: | |
8456 | case REFERENCE_TYPE: | |
a3f97cbb JW |
8457 | case OFFSET_TYPE: |
8458 | case LANG_TYPE: | |
604bb87d | 8459 | case VECTOR_TYPE: |
a3f97cbb JW |
8460 | return 0; |
8461 | ||
8462 | default: | |
ced3f397 | 8463 | gcc_unreachable (); |
a3f97cbb | 8464 | } |
71dfc51f | 8465 | |
a3f97cbb JW |
8466 | return 0; |
8467 | } | |
8468 | ||
4977bab6 ZW |
8469 | /* Given a pointer to a tree node, assumed to be some kind of a ..._TYPE |
8470 | node, return the size in bits for the type if it is a constant, or else | |
8471 | return the alignment for the type if the type's size is not constant, or | |
8472 | else return BITS_PER_WORD if the type actually turns out to be an | |
8473 | ERROR_MARK node. */ | |
8474 | ||
8475 | static inline unsigned HOST_WIDE_INT | |
7080f735 | 8476 | simple_type_size_in_bits (tree type) |
4977bab6 | 8477 | { |
4977bab6 ZW |
8478 | if (TREE_CODE (type) == ERROR_MARK) |
8479 | return BITS_PER_WORD; | |
8480 | else if (TYPE_SIZE (type) == NULL_TREE) | |
8481 | return 0; | |
8482 | else if (host_integerp (TYPE_SIZE (type), 1)) | |
8483 | return tree_low_cst (TYPE_SIZE (type), 1); | |
8484 | else | |
8485 | return TYPE_ALIGN (type); | |
8486 | } | |
8487 | ||
c3cdeef4 JB |
8488 | /* Return true if the debug information for the given type should be |
8489 | emitted as a subrange type. */ | |
8490 | ||
8491 | static inline bool | |
e7d23ce3 B |
8492 | is_subrange_type (tree type) |
8493 | { | |
de99511b B |
8494 | tree subtype = TREE_TYPE (type); |
8495 | ||
886de2d4 JB |
8496 | /* Subrange types are identified by the fact that they are integer |
8497 | types, and that they have a subtype which is either an integer type | |
8498 | or an enumeral type. */ | |
8499 | ||
8500 | if (TREE_CODE (type) != INTEGER_TYPE | |
8501 | || subtype == NULL_TREE) | |
8502 | return false; | |
8503 | ||
8504 | if (TREE_CODE (subtype) != INTEGER_TYPE | |
8505 | && TREE_CODE (subtype) != ENUMERAL_TYPE) | |
8506 | return false; | |
8507 | ||
d6672e91 JB |
8508 | if (TREE_CODE (type) == TREE_CODE (subtype) |
8509 | && int_size_in_bytes (type) == int_size_in_bytes (subtype) | |
8510 | && TYPE_MIN_VALUE (type) != NULL | |
8511 | && TYPE_MIN_VALUE (subtype) != NULL | |
8512 | && tree_int_cst_equal (TYPE_MIN_VALUE (type), TYPE_MIN_VALUE (subtype)) | |
8513 | && TYPE_MAX_VALUE (type) != NULL | |
8514 | && TYPE_MAX_VALUE (subtype) != NULL | |
8515 | && tree_int_cst_equal (TYPE_MAX_VALUE (type), TYPE_MAX_VALUE (subtype))) | |
8516 | { | |
8517 | /* The type and its subtype have the same representation. If in | |
2878ea73 MS |
8518 | addition the two types also have the same name, then the given |
8519 | type is not a subrange type, but rather a plain base type. */ | |
d6672e91 | 8520 | /* FIXME: brobecker/2004-03-22: |
2878ea73 MS |
8521 | Sizetype INTEGER_CSTs nodes are canonicalized. It should |
8522 | therefore be sufficient to check the TYPE_SIZE node pointers | |
8523 | rather than checking the actual size. Unfortunately, we have | |
8524 | found some cases, such as in the Ada "integer" type, where | |
8525 | this is not the case. Until this problem is solved, we need to | |
8526 | keep checking the actual size. */ | |
d6672e91 JB |
8527 | tree type_name = TYPE_NAME (type); |
8528 | tree subtype_name = TYPE_NAME (subtype); | |
8529 | ||
8530 | if (type_name != NULL && TREE_CODE (type_name) == TYPE_DECL) | |
2878ea73 | 8531 | type_name = DECL_NAME (type_name); |
d6672e91 JB |
8532 | |
8533 | if (subtype_name != NULL && TREE_CODE (subtype_name) == TYPE_DECL) | |
2878ea73 | 8534 | subtype_name = DECL_NAME (subtype_name); |
d6672e91 JB |
8535 | |
8536 | if (type_name == subtype_name) | |
2878ea73 | 8537 | return false; |
d6672e91 JB |
8538 | } |
8539 | ||
886de2d4 | 8540 | return true; |
c3cdeef4 JB |
8541 | } |
8542 | ||
8543 | /* Given a pointer to a tree node for a subrange type, return a pointer | |
8544 | to a DIE that describes the given type. */ | |
8545 | ||
8546 | static dw_die_ref | |
fbfd77b8 | 8547 | subrange_type_die (tree type, dw_die_ref context_die) |
c3cdeef4 | 8548 | { |
c3cdeef4 | 8549 | dw_die_ref subrange_die; |
e7d23ce3 | 8550 | const HOST_WIDE_INT size_in_bytes = int_size_in_bytes (type); |
7080f735 | 8551 | |
fbfd77b8 JB |
8552 | if (context_die == NULL) |
8553 | context_die = comp_unit_die; | |
8554 | ||
fbfd77b8 | 8555 | subrange_die = new_die (DW_TAG_subrange_type, context_die, type); |
b98d154e | 8556 | |
7cdfcf60 | 8557 | if (int_size_in_bytes (TREE_TYPE (type)) != size_in_bytes) |
e7d23ce3 B |
8558 | { |
8559 | /* The size of the subrange type and its base type do not match, | |
2878ea73 | 8560 | so we need to generate a size attribute for the subrange type. */ |
e7d23ce3 B |
8561 | add_AT_unsigned (subrange_die, DW_AT_byte_size, size_in_bytes); |
8562 | } | |
8563 | ||
c3cdeef4 JB |
8564 | if (TYPE_MIN_VALUE (type) != NULL) |
8565 | add_bound_info (subrange_die, DW_AT_lower_bound, | |
2878ea73 | 8566 | TYPE_MIN_VALUE (type)); |
c3cdeef4 JB |
8567 | if (TYPE_MAX_VALUE (type) != NULL) |
8568 | add_bound_info (subrange_die, DW_AT_upper_bound, | |
2878ea73 | 8569 | TYPE_MAX_VALUE (type)); |
c3cdeef4 JB |
8570 | |
8571 | return subrange_die; | |
8572 | } | |
8573 | ||
a3f97cbb JW |
8574 | /* Given a pointer to an arbitrary ..._TYPE tree node, return a debugging |
8575 | entry that chains various modifiers in front of the given type. */ | |
71dfc51f | 8576 | |
a3f97cbb | 8577 | static dw_die_ref |
7080f735 AJ |
8578 | modified_type_die (tree type, int is_const_type, int is_volatile_type, |
8579 | dw_die_ref context_die) | |
a3f97cbb | 8580 | { |
b3694847 | 8581 | enum tree_code code = TREE_CODE (type); |
7cdfcf60 | 8582 | dw_die_ref mod_type_die; |
b3694847 SS |
8583 | dw_die_ref sub_die = NULL; |
8584 | tree item_type = NULL; | |
7cdfcf60 GK |
8585 | tree qualified_type; |
8586 | tree name; | |
8587 | ||
8588 | if (code == ERROR_MARK) | |
8589 | return NULL; | |
8590 | ||
8591 | /* See if we already have the appropriately qualified variant of | |
8592 | this type. */ | |
8593 | qualified_type | |
8594 | = get_qualified_type (type, | |
8595 | ((is_const_type ? TYPE_QUAL_CONST : 0) | |
8596 | | (is_volatile_type ? TYPE_QUAL_VOLATILE : 0))); | |
2878ea73 | 8597 | |
7cdfcf60 GK |
8598 | /* If we do, then we can just use its DIE, if it exists. */ |
8599 | if (qualified_type) | |
a3f97cbb | 8600 | { |
7cdfcf60 | 8601 | mod_type_die = lookup_type_die (qualified_type); |
a94dbf2c | 8602 | if (mod_type_die) |
7cdfcf60 GK |
8603 | return mod_type_die; |
8604 | } | |
2878ea73 | 8605 | |
7cdfcf60 | 8606 | name = qualified_type ? TYPE_NAME (qualified_type) : NULL; |
2878ea73 | 8607 | |
7cdfcf60 GK |
8608 | /* Handle C typedef types. */ |
8609 | if (name && TREE_CODE (name) == TYPE_DECL && DECL_ORIGINAL_TYPE (name)) | |
8610 | { | |
8611 | tree dtype = TREE_TYPE (name); | |
2878ea73 | 8612 | |
7cdfcf60 | 8613 | if (qualified_type == dtype) |
a3f97cbb | 8614 | { |
7cdfcf60 GK |
8615 | /* For a named type, use the typedef. */ |
8616 | gen_type_die (qualified_type, context_die); | |
8617 | return lookup_type_die (qualified_type); | |
a3f97cbb | 8618 | } |
792eaee2 AO |
8619 | else if (is_const_type < TYPE_READONLY (dtype) |
8620 | || is_volatile_type < TYPE_VOLATILE (dtype) | |
8621 | || (is_const_type <= TYPE_READONLY (dtype) | |
8622 | && is_volatile_type <= TYPE_VOLATILE (dtype) | |
8623 | && DECL_ORIGINAL_TYPE (name) != type)) | |
7cdfcf60 GK |
8624 | /* cv-unqualified version of named type. Just use the unnamed |
8625 | type to which it refers. */ | |
8626 | return modified_type_die (DECL_ORIGINAL_TYPE (name), | |
8627 | is_const_type, is_volatile_type, | |
8628 | context_die); | |
8629 | /* Else cv-qualified version of named type; fall through. */ | |
8630 | } | |
2878ea73 | 8631 | |
7cdfcf60 GK |
8632 | if (is_const_type) |
8633 | { | |
8634 | mod_type_die = new_die (DW_TAG_const_type, comp_unit_die, type); | |
8635 | sub_die = modified_type_die (type, 0, is_volatile_type, context_die); | |
8636 | } | |
8637 | else if (is_volatile_type) | |
8638 | { | |
8639 | mod_type_die = new_die (DW_TAG_volatile_type, comp_unit_die, type); | |
8640 | sub_die = modified_type_die (type, 0, 0, context_die); | |
8641 | } | |
8642 | else if (code == POINTER_TYPE) | |
8643 | { | |
8644 | mod_type_die = new_die (DW_TAG_pointer_type, comp_unit_die, type); | |
8645 | add_AT_unsigned (mod_type_die, DW_AT_byte_size, | |
8646 | simple_type_size_in_bits (type) / BITS_PER_UNIT); | |
8647 | item_type = TREE_TYPE (type); | |
8648 | } | |
8649 | else if (code == REFERENCE_TYPE) | |
8650 | { | |
8651 | mod_type_die = new_die (DW_TAG_reference_type, comp_unit_die, type); | |
8652 | add_AT_unsigned (mod_type_die, DW_AT_byte_size, | |
8653 | simple_type_size_in_bits (type) / BITS_PER_UNIT); | |
8654 | item_type = TREE_TYPE (type); | |
8655 | } | |
8656 | else if (is_subrange_type (type)) | |
8657 | { | |
8658 | mod_type_die = subrange_type_die (type, context_die); | |
8659 | item_type = TREE_TYPE (type); | |
8660 | } | |
8661 | else if (is_base_type (type)) | |
8662 | mod_type_die = base_type_die (type); | |
8663 | else | |
8664 | { | |
8665 | gen_type_die (type, context_die); | |
2878ea73 | 8666 | |
7cdfcf60 GK |
8667 | /* We have to get the type_main_variant here (and pass that to the |
8668 | `lookup_type_die' routine) because the ..._TYPE node we have | |
8669 | might simply be a *copy* of some original type node (where the | |
8670 | copy was created to help us keep track of typedef names) and | |
8671 | that copy might have a different TYPE_UID from the original | |
8672 | ..._TYPE node. */ | |
8673 | if (TREE_CODE (type) != VECTOR_TYPE) | |
8674 | return lookup_type_die (type_main_variant (type)); | |
a3f97cbb | 8675 | else |
7cdfcf60 GK |
8676 | /* Vectors have the debugging information in the type, |
8677 | not the main variant. */ | |
8678 | return lookup_type_die (type); | |
8679 | } | |
2878ea73 | 8680 | |
7cdfcf60 GK |
8681 | /* Builtin types don't have a DECL_ORIGINAL_TYPE. For those, |
8682 | don't output a DW_TAG_typedef, since there isn't one in the | |
8683 | user's program; just attach a DW_AT_name to the type. */ | |
8684 | if (name | |
8685 | && (TREE_CODE (name) != TYPE_DECL || TREE_TYPE (name) == qualified_type)) | |
8686 | { | |
8687 | if (TREE_CODE (name) == TYPE_DECL) | |
8688 | /* Could just call add_name_and_src_coords_attributes here, | |
8689 | but since this is a builtin type it doesn't have any | |
8690 | useful source coordinates anyway. */ | |
8691 | name = DECL_NAME (name); | |
8692 | add_name_attribute (mod_type_die, IDENTIFIER_POINTER (name)); | |
a3f97cbb | 8693 | } |
2878ea73 | 8694 | |
7cdfcf60 GK |
8695 | if (qualified_type) |
8696 | equate_type_number_to_die (qualified_type, mod_type_die); | |
71dfc51f | 8697 | |
dfcf9891 | 8698 | if (item_type) |
71dfc51f RK |
8699 | /* We must do this after the equate_type_number_to_die call, in case |
8700 | this is a recursive type. This ensures that the modified_type_die | |
8701 | recursion will terminate even if the type is recursive. Recursive | |
8702 | types are possible in Ada. */ | |
8703 | sub_die = modified_type_die (item_type, | |
8704 | TYPE_READONLY (item_type), | |
8705 | TYPE_VOLATILE (item_type), | |
8706 | context_die); | |
8707 | ||
a3f97cbb | 8708 | if (sub_die != NULL) |
71dfc51f RK |
8709 | add_AT_die_ref (mod_type_die, DW_AT_type, sub_die); |
8710 | ||
a3f97cbb JW |
8711 | return mod_type_die; |
8712 | } | |
8713 | ||
a3f97cbb | 8714 | /* Given a pointer to an arbitrary ..._TYPE tree node, return true if it is |
6d2f8887 | 8715 | an enumerated type. */ |
71dfc51f RK |
8716 | |
8717 | static inline int | |
7080f735 | 8718 | type_is_enum (tree type) |
a3f97cbb JW |
8719 | { |
8720 | return TREE_CODE (type) == ENUMERAL_TYPE; | |
8721 | } | |
8722 | ||
23959f19 | 8723 | /* Return the DBX register number described by a given RTL node. */ |
7d9d8943 AM |
8724 | |
8725 | static unsigned int | |
23959f19 | 8726 | dbx_reg_number (rtx rtl) |
7d9d8943 | 8727 | { |
b3694847 | 8728 | unsigned regno = REGNO (rtl); |
7d9d8943 | 8729 | |
ced3f397 | 8730 | gcc_assert (regno < FIRST_PSEUDO_REGISTER); |
7d9d8943 | 8731 | |
30e6f306 | 8732 | #ifdef LEAF_REG_REMAP |
ea049a41 EB |
8733 | if (current_function_uses_only_leaf_regs) |
8734 | { | |
8735 | int leaf_reg = LEAF_REG_REMAP (regno); | |
8736 | if (leaf_reg != -1) | |
8737 | regno = (unsigned) leaf_reg; | |
8738 | } | |
30e6f306 RH |
8739 | #endif |
8740 | ||
e7af1d45 | 8741 | return DBX_REGISTER_NUMBER (regno); |
7d9d8943 AM |
8742 | } |
8743 | ||
216448c7 EB |
8744 | /* Optionally add a DW_OP_piece term to a location description expression. |
8745 | DW_OP_piece is only added if the location description expression already | |
8746 | doesn't end with DW_OP_piece. */ | |
8747 | ||
8748 | static void | |
8749 | add_loc_descr_op_piece (dw_loc_descr_ref *list_head, int size) | |
8750 | { | |
8751 | dw_loc_descr_ref loc; | |
8752 | ||
8753 | if (*list_head != NULL) | |
8754 | { | |
8755 | /* Find the end of the chain. */ | |
8756 | for (loc = *list_head; loc->dw_loc_next != NULL; loc = loc->dw_loc_next) | |
8757 | ; | |
8758 | ||
8759 | if (loc->dw_loc_opc != DW_OP_piece) | |
8760 | loc->dw_loc_next = new_loc_descr (DW_OP_piece, size, 0); | |
8761 | } | |
8762 | } | |
8763 | ||
e7af1d45 | 8764 | /* Return a location descriptor that designates a machine register or |
96714395 | 8765 | zero if there is none. */ |
71dfc51f | 8766 | |
a3f97cbb | 8767 | static dw_loc_descr_ref |
62760ffd | 8768 | reg_loc_descriptor (rtx rtl, enum var_init_status initialized) |
a3f97cbb | 8769 | { |
96714395 | 8770 | rtx regs; |
71dfc51f | 8771 | |
e7af1d45 RK |
8772 | if (REGNO (rtl) >= FIRST_PSEUDO_REGISTER) |
8773 | return 0; | |
8774 | ||
5fd9b178 | 8775 | regs = targetm.dwarf_register_span (rtl); |
96714395 | 8776 | |
30e6f306 | 8777 | if (hard_regno_nregs[REGNO (rtl)][GET_MODE (rtl)] > 1 || regs) |
62760ffd | 8778 | return multiple_reg_loc_descriptor (rtl, regs, initialized); |
96714395 | 8779 | else |
62760ffd | 8780 | return one_reg_loc_descriptor (dbx_reg_number (rtl), initialized); |
96714395 AH |
8781 | } |
8782 | ||
8783 | /* Return a location descriptor that designates a machine register for | |
8784 | a given hard register number. */ | |
8785 | ||
8786 | static dw_loc_descr_ref | |
62760ffd | 8787 | one_reg_loc_descriptor (unsigned int regno, enum var_init_status initialized) |
96714395 | 8788 | { |
62760ffd | 8789 | dw_loc_descr_ref reg_loc_descr; |
96714395 | 8790 | if (regno <= 31) |
62760ffd | 8791 | reg_loc_descr = new_loc_descr (DW_OP_reg0 + regno, 0, 0); |
d22c2324 | 8792 | else |
62760ffd CT |
8793 | reg_loc_descr = new_loc_descr (DW_OP_regx, regno, 0); |
8794 | ||
8795 | if (initialized == VAR_INIT_STATUS_UNINITIALIZED) | |
8796 | add_loc_descr (®_loc_descr, new_loc_descr (DW_OP_GNU_uninit, 0, 0)); | |
8797 | ||
8798 | return reg_loc_descr; | |
96714395 AH |
8799 | } |
8800 | ||
8801 | /* Given an RTL of a register, return a location descriptor that | |
8802 | designates a value that spans more than one register. */ | |
8803 | ||
8804 | static dw_loc_descr_ref | |
62760ffd CT |
8805 | multiple_reg_loc_descriptor (rtx rtl, rtx regs, |
8806 | enum var_init_status initialized) | |
96714395 AH |
8807 | { |
8808 | int nregs, size, i; | |
8809 | unsigned reg; | |
8810 | dw_loc_descr_ref loc_result = NULL; | |
71dfc51f | 8811 | |
f9918968 JJ |
8812 | reg = REGNO (rtl); |
8813 | #ifdef LEAF_REG_REMAP | |
ea049a41 EB |
8814 | if (current_function_uses_only_leaf_regs) |
8815 | { | |
8816 | int leaf_reg = LEAF_REG_REMAP (reg); | |
8817 | if (leaf_reg != -1) | |
8818 | reg = (unsigned) leaf_reg; | |
8819 | } | |
f9918968 JJ |
8820 | #endif |
8821 | gcc_assert ((unsigned) DBX_REGISTER_NUMBER (reg) == dbx_reg_number (rtl)); | |
23959f19 | 8822 | nregs = hard_regno_nregs[REGNO (rtl)][GET_MODE (rtl)]; |
96714395 AH |
8823 | |
8824 | /* Simple, contiguous registers. */ | |
8825 | if (regs == NULL_RTX) | |
8826 | { | |
8827 | size = GET_MODE_SIZE (GET_MODE (rtl)) / nregs; | |
8828 | ||
8829 | loc_result = NULL; | |
8830 | while (nregs--) | |
8831 | { | |
8832 | dw_loc_descr_ref t; | |
8833 | ||
62760ffd CT |
8834 | t = one_reg_loc_descriptor (DBX_REGISTER_NUMBER (reg), |
8835 | VAR_INIT_STATUS_INITIALIZED); | |
96714395 | 8836 | add_loc_descr (&loc_result, t); |
c938250d | 8837 | add_loc_descr_op_piece (&loc_result, size); |
31ca3635 | 8838 | ++reg; |
96714395 AH |
8839 | } |
8840 | return loc_result; | |
8841 | } | |
8842 | ||
8843 | /* Now onto stupid register sets in non contiguous locations. */ | |
8844 | ||
ced3f397 | 8845 | gcc_assert (GET_CODE (regs) == PARALLEL); |
96714395 AH |
8846 | |
8847 | size = GET_MODE_SIZE (GET_MODE (XVECEXP (regs, 0, 0))); | |
8848 | loc_result = NULL; | |
8849 | ||
8850 | for (i = 0; i < XVECLEN (regs, 0); ++i) | |
8851 | { | |
8852 | dw_loc_descr_ref t; | |
8853 | ||
62760ffd CT |
8854 | t = one_reg_loc_descriptor (REGNO (XVECEXP (regs, 0, i)), |
8855 | VAR_INIT_STATUS_INITIALIZED); | |
96714395 AH |
8856 | add_loc_descr (&loc_result, t); |
8857 | size = GET_MODE_SIZE (GET_MODE (XVECEXP (regs, 0, 0))); | |
c938250d | 8858 | add_loc_descr_op_piece (&loc_result, size); |
96714395 | 8859 | } |
62760ffd CT |
8860 | |
8861 | if (loc_result && initialized == VAR_INIT_STATUS_UNINITIALIZED) | |
8862 | add_loc_descr (&loc_result, new_loc_descr (DW_OP_GNU_uninit, 0, 0)); | |
a3f97cbb JW |
8863 | return loc_result; |
8864 | } | |
8865 | ||
d8041cc8 RH |
8866 | /* Return a location descriptor that designates a constant. */ |
8867 | ||
8868 | static dw_loc_descr_ref | |
7080f735 | 8869 | int_loc_descriptor (HOST_WIDE_INT i) |
d8041cc8 RH |
8870 | { |
8871 | enum dwarf_location_atom op; | |
8872 | ||
8873 | /* Pick the smallest representation of a constant, rather than just | |
8874 | defaulting to the LEB encoding. */ | |
8875 | if (i >= 0) | |
8876 | { | |
8877 | if (i <= 31) | |
8878 | op = DW_OP_lit0 + i; | |
8879 | else if (i <= 0xff) | |
8880 | op = DW_OP_const1u; | |
8881 | else if (i <= 0xffff) | |
8882 | op = DW_OP_const2u; | |
8883 | else if (HOST_BITS_PER_WIDE_INT == 32 | |
8884 | || i <= 0xffffffff) | |
8885 | op = DW_OP_const4u; | |
8886 | else | |
8887 | op = DW_OP_constu; | |
8888 | } | |
8889 | else | |
8890 | { | |
8891 | if (i >= -0x80) | |
8892 | op = DW_OP_const1s; | |
8893 | else if (i >= -0x8000) | |
8894 | op = DW_OP_const2s; | |
8895 | else if (HOST_BITS_PER_WIDE_INT == 32 | |
8896 | || i >= -0x80000000) | |
8897 | op = DW_OP_const4s; | |
8898 | else | |
8899 | op = DW_OP_consts; | |
8900 | } | |
8901 | ||
8902 | return new_loc_descr (op, i, 0); | |
8903 | } | |
8904 | ||
a3f97cbb | 8905 | /* Return a location descriptor that designates a base+offset location. */ |
71dfc51f | 8906 | |
a3f97cbb | 8907 | static dw_loc_descr_ref |
62760ffd CT |
8908 | based_loc_descr (rtx reg, HOST_WIDE_INT offset, |
8909 | enum var_init_status initialized) | |
a3f97cbb | 8910 | { |
f6672e8e | 8911 | unsigned int regno; |
62760ffd | 8912 | dw_loc_descr_ref result; |
30e6f306 RH |
8913 | |
8914 | /* We only use "frame base" when we're sure we're talking about the | |
8915 | post-prologue local stack frame. We do this by *not* running | |
8916 | register elimination until this point, and recognizing the special | |
8917 | argument pointer and soft frame pointer rtx's. */ | |
8918 | if (reg == arg_pointer_rtx || reg == frame_pointer_rtx) | |
8919 | { | |
f6672e8e | 8920 | rtx elim = eliminate_regs (reg, VOIDmode, NULL_RTX); |
30e6f306 | 8921 | |
f6672e8e RH |
8922 | if (elim != reg) |
8923 | { | |
8924 | if (GET_CODE (elim) == PLUS) | |
8925 | { | |
8926 | offset += INTVAL (XEXP (elim, 1)); | |
8927 | elim = XEXP (elim, 0); | |
8928 | } | |
8929 | gcc_assert (elim == (frame_pointer_needed ? hard_frame_pointer_rtx | |
8930 | : stack_pointer_rtx)); | |
2878ea73 | 8931 | offset += frame_pointer_fb_offset; |
30e6f306 | 8932 | |
2878ea73 | 8933 | return new_loc_descr (DW_OP_fbreg, offset, 0); |
f6672e8e | 8934 | } |
30e6f306 | 8935 | } |
71dfc51f | 8936 | |
f6672e8e RH |
8937 | regno = dbx_reg_number (reg); |
8938 | if (regno <= 31) | |
62760ffd | 8939 | result = new_loc_descr (DW_OP_breg0 + regno, offset, 0); |
f6672e8e | 8940 | else |
62760ffd CT |
8941 | result = new_loc_descr (DW_OP_bregx, regno, offset); |
8942 | ||
8943 | if (initialized == VAR_INIT_STATUS_UNINITIALIZED) | |
8944 | add_loc_descr (&result, new_loc_descr (DW_OP_GNU_uninit, 0, 0)); | |
8945 | ||
8946 | return result; | |
a3f97cbb JW |
8947 | } |
8948 | ||
8949 | /* Return true if this RTL expression describes a base+offset calculation. */ | |
71dfc51f RK |
8950 | |
8951 | static inline int | |
7080f735 | 8952 | is_based_loc (rtx rtl) |
a3f97cbb | 8953 | { |
173bf5be | 8954 | return (GET_CODE (rtl) == PLUS |
f8cfc6aa | 8955 | && ((REG_P (XEXP (rtl, 0)) |
173bf5be KH |
8956 | && REGNO (XEXP (rtl, 0)) < FIRST_PSEUDO_REGISTER |
8957 | && GET_CODE (XEXP (rtl, 1)) == CONST_INT))); | |
a3f97cbb JW |
8958 | } |
8959 | ||
0c5c188f ILT |
8960 | /* Return a descriptor that describes the concatenation of N locations |
8961 | used to form the address of a memory location. */ | |
8962 | ||
8963 | static dw_loc_descr_ref | |
62760ffd CT |
8964 | concatn_mem_loc_descriptor (rtx concatn, enum machine_mode mode, |
8965 | enum var_init_status initialized) | |
0c5c188f ILT |
8966 | { |
8967 | unsigned int i; | |
8968 | dw_loc_descr_ref cc_loc_result = NULL; | |
8969 | unsigned int n = XVECLEN (concatn, 0); | |
8970 | ||
8971 | for (i = 0; i < n; ++i) | |
8972 | { | |
8973 | dw_loc_descr_ref ref; | |
8974 | rtx x = XVECEXP (concatn, 0, i); | |
8975 | ||
62760ffd | 8976 | ref = mem_loc_descriptor (x, mode, VAR_INIT_STATUS_INITIALIZED); |
0c5c188f ILT |
8977 | if (ref == NULL) |
8978 | return NULL; | |
8979 | ||
8980 | add_loc_descr (&cc_loc_result, ref); | |
8981 | add_loc_descr_op_piece (&cc_loc_result, GET_MODE_SIZE (GET_MODE (x))); | |
8982 | } | |
8983 | ||
62760ffd CT |
8984 | if (cc_loc_result && initialized == VAR_INIT_STATUS_UNINITIALIZED) |
8985 | add_loc_descr (&cc_loc_result, new_loc_descr (DW_OP_GNU_uninit, 0, 0)); | |
8986 | ||
0c5c188f ILT |
8987 | return cc_loc_result; |
8988 | } | |
8989 | ||
a3f97cbb JW |
8990 | /* The following routine converts the RTL for a variable or parameter |
8991 | (resident in memory) into an equivalent Dwarf representation of a | |
8992 | mechanism for getting the address of that same variable onto the top of a | |
8993 | hypothetical "address evaluation" stack. | |
71dfc51f | 8994 | |
a3f97cbb JW |
8995 | When creating memory location descriptors, we are effectively transforming |
8996 | the RTL for a memory-resident object into its Dwarf postfix expression | |
8997 | equivalent. This routine recursively descends an RTL tree, turning | |
e60d4d7b JL |
8998 | it into Dwarf postfix code as it goes. |
8999 | ||
9000 | MODE is the mode of the memory reference, needed to handle some | |
e7af1d45 RK |
9001 | autoincrement addressing modes. |
9002 | ||
30e6f306 RH |
9003 | CAN_USE_FBREG is a flag whether we can use DW_AT_frame_base in the |
9004 | location list for RTL. | |
0a2d3d69 | 9005 | |
e7af1d45 | 9006 | Return 0 if we can't represent the location. */ |
71dfc51f | 9007 | |
a3f97cbb | 9008 | static dw_loc_descr_ref |
62760ffd CT |
9009 | mem_loc_descriptor (rtx rtl, enum machine_mode mode, |
9010 | enum var_init_status initialized) | |
a3f97cbb JW |
9011 | { |
9012 | dw_loc_descr_ref mem_loc_result = NULL; | |
40f0b3ee | 9013 | enum dwarf_location_atom op; |
e7af1d45 | 9014 | |
556273e0 | 9015 | /* Note that for a dynamically sized array, the location we will generate a |
a3f97cbb JW |
9016 | description of here will be the lowest numbered location which is |
9017 | actually within the array. That's *not* necessarily the same as the | |
9018 | zeroth element of the array. */ | |
71dfc51f | 9019 | |
5fd9b178 | 9020 | rtl = targetm.delegitimize_address (rtl); |
1865dbb5 | 9021 | |
a3f97cbb JW |
9022 | switch (GET_CODE (rtl)) |
9023 | { | |
e60d4d7b JL |
9024 | case POST_INC: |
9025 | case POST_DEC: | |
e2134eea | 9026 | case POST_MODIFY: |
e60d4d7b JL |
9027 | /* POST_INC and POST_DEC can be handled just like a SUBREG. So we |
9028 | just fall into the SUBREG code. */ | |
9029 | ||
2ad9852d | 9030 | /* ... fall through ... */ |
e60d4d7b | 9031 | |
a3f97cbb JW |
9032 | case SUBREG: |
9033 | /* The case of a subreg may arise when we have a local (register) | |
73c68f61 SS |
9034 | variable or a formal (register) parameter which doesn't quite fill |
9035 | up an entire register. For now, just assume that it is | |
9036 | legitimate to make the Dwarf info refer to the whole register which | |
9037 | contains the given subreg. */ | |
75735872 | 9038 | rtl = XEXP (rtl, 0); |
71dfc51f | 9039 | |
2ad9852d | 9040 | /* ... fall through ... */ |
a3f97cbb JW |
9041 | |
9042 | case REG: | |
9043 | /* Whenever a register number forms a part of the description of the | |
73c68f61 SS |
9044 | method for calculating the (dynamic) address of a memory resident |
9045 | object, DWARF rules require the register number be referred to as | |
9046 | a "base register". This distinction is not based in any way upon | |
9047 | what category of register the hardware believes the given register | |
9048 | belongs to. This is strictly DWARF terminology we're dealing with | |
9049 | here. Note that in cases where the location of a memory-resident | |
9050 | data object could be expressed as: OP_ADD (OP_BASEREG (basereg), | |
9051 | OP_CONST (0)) the actual DWARF location descriptor that we generate | |
9052 | may just be OP_BASEREG (basereg). This may look deceptively like | |
9053 | the object in question was allocated to a register (rather than in | |
9054 | memory) so DWARF consumers need to be aware of the subtle | |
9055 | distinction between OP_REG and OP_BASEREG. */ | |
e7af1d45 | 9056 | if (REGNO (rtl) < FIRST_PSEUDO_REGISTER) |
62760ffd | 9057 | mem_loc_result = based_loc_descr (rtl, 0, VAR_INIT_STATUS_INITIALIZED); |
a3f97cbb JW |
9058 | break; |
9059 | ||
9060 | case MEM: | |
62760ffd CT |
9061 | mem_loc_result = mem_loc_descriptor (XEXP (rtl, 0), GET_MODE (rtl), |
9062 | VAR_INIT_STATUS_INITIALIZED); | |
e7af1d45 RK |
9063 | if (mem_loc_result != 0) |
9064 | add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_deref, 0, 0)); | |
a3f97cbb JW |
9065 | break; |
9066 | ||
1ce324c3 EB |
9067 | case LO_SUM: |
9068 | rtl = XEXP (rtl, 1); | |
9069 | ||
9070 | /* ... fall through ... */ | |
9071 | ||
d8041cc8 RH |
9072 | case LABEL_REF: |
9073 | /* Some ports can transform a symbol ref into a label ref, because | |
7080f735 AJ |
9074 | the symbol ref is too far away and has to be dumped into a constant |
9075 | pool. */ | |
a3f97cbb JW |
9076 | case CONST: |
9077 | case SYMBOL_REF: | |
6331d1c1 | 9078 | /* Alternatively, the symbol in the constant pool might be referenced |
c6f9b9a1 | 9079 | by a different symbol. */ |
2ad9852d | 9080 | if (GET_CODE (rtl) == SYMBOL_REF && CONSTANT_POOL_ADDRESS_P (rtl)) |
79cdfa4b | 9081 | { |
149d6f9e JJ |
9082 | bool marked; |
9083 | rtx tmp = get_pool_constant_mark (rtl, &marked); | |
2ad9852d | 9084 | |
6331d1c1 | 9085 | if (GET_CODE (tmp) == SYMBOL_REF) |
149d6f9e JJ |
9086 | { |
9087 | rtl = tmp; | |
9088 | if (CONSTANT_POOL_ADDRESS_P (tmp)) | |
9089 | get_pool_constant_mark (tmp, &marked); | |
9090 | else | |
9091 | marked = true; | |
9092 | } | |
9093 | ||
9094 | /* If all references to this pool constant were optimized away, | |
9095 | it was not output and thus we can't represent it. | |
9096 | FIXME: might try to use DW_OP_const_value here, though | |
9097 | DW_OP_piece complicates it. */ | |
9098 | if (!marked) | |
9099 | return 0; | |
79cdfa4b TM |
9100 | } |
9101 | ||
a3f97cbb JW |
9102 | mem_loc_result = new_loc_descr (DW_OP_addr, 0, 0); |
9103 | mem_loc_result->dw_loc_oprnd1.val_class = dw_val_class_addr; | |
c470afad | 9104 | mem_loc_result->dw_loc_oprnd1.v.val_addr = rtl; |
a1bbd445 | 9105 | VEC_safe_push (rtx, gc, used_rtx_array, rtl); |
a3f97cbb JW |
9106 | break; |
9107 | ||
e2134eea JH |
9108 | case PRE_MODIFY: |
9109 | /* Extract the PLUS expression nested inside and fall into | |
73c68f61 | 9110 | PLUS code below. */ |
e2134eea JH |
9111 | rtl = XEXP (rtl, 1); |
9112 | goto plus; | |
9113 | ||
e60d4d7b JL |
9114 | case PRE_INC: |
9115 | case PRE_DEC: | |
9116 | /* Turn these into a PLUS expression and fall into the PLUS code | |
9117 | below. */ | |
9118 | rtl = gen_rtx_PLUS (word_mode, XEXP (rtl, 0), | |
9119 | GEN_INT (GET_CODE (rtl) == PRE_INC | |
556273e0 KH |
9120 | ? GET_MODE_UNIT_SIZE (mode) |
9121 | : -GET_MODE_UNIT_SIZE (mode))); | |
9122 | ||
2ad9852d | 9123 | /* ... fall through ... */ |
e60d4d7b | 9124 | |
a3f97cbb | 9125 | case PLUS: |
e2134eea | 9126 | plus: |
a3f97cbb | 9127 | if (is_based_loc (rtl)) |
30e6f306 | 9128 | mem_loc_result = based_loc_descr (XEXP (rtl, 0), |
62760ffd CT |
9129 | INTVAL (XEXP (rtl, 1)), |
9130 | VAR_INIT_STATUS_INITIALIZED); | |
a3f97cbb JW |
9131 | else |
9132 | { | |
62760ffd CT |
9133 | mem_loc_result = mem_loc_descriptor (XEXP (rtl, 0), mode, |
9134 | VAR_INIT_STATUS_INITIALIZED); | |
e7af1d45 RK |
9135 | if (mem_loc_result == 0) |
9136 | break; | |
d8041cc8 RH |
9137 | |
9138 | if (GET_CODE (XEXP (rtl, 1)) == CONST_INT | |
9139 | && INTVAL (XEXP (rtl, 1)) >= 0) | |
e7af1d45 RK |
9140 | add_loc_descr (&mem_loc_result, |
9141 | new_loc_descr (DW_OP_plus_uconst, | |
9142 | INTVAL (XEXP (rtl, 1)), 0)); | |
d8041cc8 RH |
9143 | else |
9144 | { | |
9145 | add_loc_descr (&mem_loc_result, | |
62760ffd CT |
9146 | mem_loc_descriptor (XEXP (rtl, 1), mode, |
9147 | VAR_INIT_STATUS_INITIALIZED)); | |
d8041cc8 RH |
9148 | add_loc_descr (&mem_loc_result, |
9149 | new_loc_descr (DW_OP_plus, 0, 0)); | |
9150 | } | |
a3f97cbb JW |
9151 | } |
9152 | break; | |
9153 | ||
40f0b3ee PB |
9154 | /* If a pseudo-reg is optimized away, it is possible for it to |
9155 | be replaced with a MEM containing a multiply or shift. */ | |
dd2478ae | 9156 | case MULT: |
40f0b3ee PB |
9157 | op = DW_OP_mul; |
9158 | goto do_binop; | |
9159 | ||
9160 | case ASHIFT: | |
9161 | op = DW_OP_shl; | |
9162 | goto do_binop; | |
a1c496cb | 9163 | |
40f0b3ee PB |
9164 | case ASHIFTRT: |
9165 | op = DW_OP_shra; | |
9166 | goto do_binop; | |
9167 | ||
9168 | case LSHIFTRT: | |
9169 | op = DW_OP_shr; | |
9170 | goto do_binop; | |
9171 | ||
9172 | do_binop: | |
e7af1d45 | 9173 | { |
62760ffd CT |
9174 | dw_loc_descr_ref op0 = mem_loc_descriptor (XEXP (rtl, 0), mode, |
9175 | VAR_INIT_STATUS_INITIALIZED); | |
9176 | dw_loc_descr_ref op1 = mem_loc_descriptor (XEXP (rtl, 1), mode, | |
9177 | VAR_INIT_STATUS_INITIALIZED); | |
e7af1d45 RK |
9178 | |
9179 | if (op0 == 0 || op1 == 0) | |
9180 | break; | |
9181 | ||
9182 | mem_loc_result = op0; | |
9183 | add_loc_descr (&mem_loc_result, op1); | |
40f0b3ee | 9184 | add_loc_descr (&mem_loc_result, new_loc_descr (op, 0, 0)); |
e7af1d45 RK |
9185 | break; |
9186 | } | |
dd2478ae | 9187 | |
a3f97cbb | 9188 | case CONST_INT: |
d8041cc8 | 9189 | mem_loc_result = int_loc_descriptor (INTVAL (rtl)); |
a3f97cbb JW |
9190 | break; |
9191 | ||
0c5c188f | 9192 | case CONCATN: |
62760ffd CT |
9193 | mem_loc_result = concatn_mem_loc_descriptor (rtl, mode, |
9194 | VAR_INIT_STATUS_INITIALIZED); | |
0c5c188f ILT |
9195 | break; |
9196 | ||
a3f97cbb | 9197 | default: |
ced3f397 | 9198 | gcc_unreachable (); |
a3f97cbb | 9199 | } |
71dfc51f | 9200 | |
62760ffd CT |
9201 | if (mem_loc_result && initialized == VAR_INIT_STATUS_UNINITIALIZED) |
9202 | add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_GNU_uninit, 0, 0)); | |
9203 | ||
a3f97cbb JW |
9204 | return mem_loc_result; |
9205 | } | |
9206 | ||
956d6950 | 9207 | /* Return a descriptor that describes the concatenation of two locations. |
4401bf24 JL |
9208 | This is typically a complex variable. */ |
9209 | ||
9210 | static dw_loc_descr_ref | |
62760ffd | 9211 | concat_loc_descriptor (rtx x0, rtx x1, enum var_init_status initialized) |
4401bf24 JL |
9212 | { |
9213 | dw_loc_descr_ref cc_loc_result = NULL; | |
62760ffd CT |
9214 | dw_loc_descr_ref x0_ref = loc_descriptor (x0, VAR_INIT_STATUS_INITIALIZED); |
9215 | dw_loc_descr_ref x1_ref = loc_descriptor (x1, VAR_INIT_STATUS_INITIALIZED); | |
4401bf24 | 9216 | |
e7af1d45 RK |
9217 | if (x0_ref == 0 || x1_ref == 0) |
9218 | return 0; | |
9219 | ||
9220 | cc_loc_result = x0_ref; | |
c938250d | 9221 | add_loc_descr_op_piece (&cc_loc_result, GET_MODE_SIZE (GET_MODE (x0))); |
4401bf24 | 9222 | |
e7af1d45 | 9223 | add_loc_descr (&cc_loc_result, x1_ref); |
c938250d | 9224 | add_loc_descr_op_piece (&cc_loc_result, GET_MODE_SIZE (GET_MODE (x1))); |
4401bf24 | 9225 | |
62760ffd CT |
9226 | if (initialized == VAR_INIT_STATUS_UNINITIALIZED) |
9227 | add_loc_descr (&cc_loc_result, new_loc_descr (DW_OP_GNU_uninit, 0, 0)); | |
9228 | ||
4401bf24 JL |
9229 | return cc_loc_result; |
9230 | } | |
9231 | ||
e53a16e7 ILT |
9232 | /* Return a descriptor that describes the concatenation of N |
9233 | locations. */ | |
9234 | ||
9235 | static dw_loc_descr_ref | |
62760ffd | 9236 | concatn_loc_descriptor (rtx concatn, enum var_init_status initialized) |
e53a16e7 ILT |
9237 | { |
9238 | unsigned int i; | |
9239 | dw_loc_descr_ref cc_loc_result = NULL; | |
9240 | unsigned int n = XVECLEN (concatn, 0); | |
9241 | ||
9242 | for (i = 0; i < n; ++i) | |
9243 | { | |
9244 | dw_loc_descr_ref ref; | |
9245 | rtx x = XVECEXP (concatn, 0, i); | |
9246 | ||
62760ffd | 9247 | ref = loc_descriptor (x, VAR_INIT_STATUS_INITIALIZED); |
e53a16e7 ILT |
9248 | if (ref == NULL) |
9249 | return NULL; | |
9250 | ||
9251 | add_loc_descr (&cc_loc_result, ref); | |
9252 | add_loc_descr_op_piece (&cc_loc_result, GET_MODE_SIZE (GET_MODE (x))); | |
9253 | } | |
9254 | ||
62760ffd CT |
9255 | if (cc_loc_result && initialized == VAR_INIT_STATUS_UNINITIALIZED) |
9256 | add_loc_descr (&cc_loc_result, new_loc_descr (DW_OP_GNU_uninit, 0, 0)); | |
9257 | ||
e53a16e7 ILT |
9258 | return cc_loc_result; |
9259 | } | |
9260 | ||
a3f97cbb JW |
9261 | /* Output a proper Dwarf location descriptor for a variable or parameter |
9262 | which is either allocated in a register or in a memory location. For a | |
9263 | register, we just generate an OP_REG and the register number. For a | |
9264 | memory location we provide a Dwarf postfix expression describing how to | |
e7af1d45 RK |
9265 | generate the (dynamic) address of the object onto the address stack. |
9266 | ||
9267 | If we don't know how to describe it, return 0. */ | |
71dfc51f | 9268 | |
a3f97cbb | 9269 | static dw_loc_descr_ref |
62760ffd | 9270 | loc_descriptor (rtx rtl, enum var_init_status initialized) |
a3f97cbb JW |
9271 | { |
9272 | dw_loc_descr_ref loc_result = NULL; | |
e7af1d45 | 9273 | |
a3f97cbb JW |
9274 | switch (GET_CODE (rtl)) |
9275 | { | |
9276 | case SUBREG: | |
a3f97cbb | 9277 | /* The case of a subreg may arise when we have a local (register) |
73c68f61 SS |
9278 | variable or a formal (register) parameter which doesn't quite fill |
9279 | up an entire register. For now, just assume that it is | |
9280 | legitimate to make the Dwarf info refer to the whole register which | |
9281 | contains the given subreg. */ | |
ddef6bc7 | 9282 | rtl = SUBREG_REG (rtl); |
71dfc51f | 9283 | |
2ad9852d | 9284 | /* ... fall through ... */ |
a3f97cbb JW |
9285 | |
9286 | case REG: | |
62760ffd | 9287 | loc_result = reg_loc_descriptor (rtl, initialized); |
a3f97cbb JW |
9288 | break; |
9289 | ||
9290 | case MEM: | |
62760ffd CT |
9291 | loc_result = mem_loc_descriptor (XEXP (rtl, 0), GET_MODE (rtl), |
9292 | initialized); | |
a3f97cbb JW |
9293 | break; |
9294 | ||
4401bf24 | 9295 | case CONCAT: |
62760ffd CT |
9296 | loc_result = concat_loc_descriptor (XEXP (rtl, 0), XEXP (rtl, 1), |
9297 | initialized); | |
4401bf24 JL |
9298 | break; |
9299 | ||
e53a16e7 | 9300 | case CONCATN: |
62760ffd | 9301 | loc_result = concatn_loc_descriptor (rtl, initialized); |
e53a16e7 ILT |
9302 | break; |
9303 | ||
0a2d3d69 DB |
9304 | case VAR_LOCATION: |
9305 | /* Single part. */ | |
9306 | if (GET_CODE (XEXP (rtl, 1)) != PARALLEL) | |
9307 | { | |
62760ffd | 9308 | loc_result = loc_descriptor (XEXP (XEXP (rtl, 1), 0), initialized); |
1a186ec5 | 9309 | break; |
0a2d3d69 | 9310 | } |
0a2d3d69 | 9311 | |
1a186ec5 RH |
9312 | rtl = XEXP (rtl, 1); |
9313 | /* FALLTHRU */ | |
0a2d3d69 | 9314 | |
1a186ec5 RH |
9315 | case PARALLEL: |
9316 | { | |
9317 | rtvec par_elems = XVEC (rtl, 0); | |
9318 | int num_elem = GET_NUM_ELEM (par_elems); | |
9319 | enum machine_mode mode; | |
9320 | int i; | |
9321 | ||
9322 | /* Create the first one, so we have something to add to. */ | |
62760ffd CT |
9323 | loc_result = loc_descriptor (XEXP (RTVEC_ELT (par_elems, 0), 0), |
9324 | initialized); | |
1a186ec5 | 9325 | mode = GET_MODE (XEXP (RTVEC_ELT (par_elems, 0), 0)); |
c938250d | 9326 | add_loc_descr_op_piece (&loc_result, GET_MODE_SIZE (mode)); |
1a186ec5 RH |
9327 | for (i = 1; i < num_elem; i++) |
9328 | { | |
9329 | dw_loc_descr_ref temp; | |
9330 | ||
62760ffd CT |
9331 | temp = loc_descriptor (XEXP (RTVEC_ELT (par_elems, i), 0), |
9332 | initialized); | |
1a186ec5 RH |
9333 | add_loc_descr (&loc_result, temp); |
9334 | mode = GET_MODE (XEXP (RTVEC_ELT (par_elems, i), 0)); | |
c938250d | 9335 | add_loc_descr_op_piece (&loc_result, GET_MODE_SIZE (mode)); |
1a186ec5 RH |
9336 | } |
9337 | } | |
0a2d3d69 DB |
9338 | break; |
9339 | ||
a3f97cbb | 9340 | default: |
ced3f397 | 9341 | gcc_unreachable (); |
a3f97cbb | 9342 | } |
71dfc51f | 9343 | |
a3f97cbb JW |
9344 | return loc_result; |
9345 | } | |
9346 | ||
2ad9852d | 9347 | /* Similar, but generate the descriptor from trees instead of rtl. This comes |
1a186ec5 RH |
9348 | up particularly with variable length arrays. WANT_ADDRESS is 2 if this is |
9349 | a top-level invocation of loc_descriptor_from_tree; is 1 if this is not a | |
9350 | top-level invocation, and we require the address of LOC; is 0 if we require | |
9351 | the value of LOC. */ | |
d8041cc8 RH |
9352 | |
9353 | static dw_loc_descr_ref | |
1a186ec5 | 9354 | loc_descriptor_from_tree_1 (tree loc, int want_address) |
d8041cc8 | 9355 | { |
e7af1d45 | 9356 | dw_loc_descr_ref ret, ret1; |
1a186ec5 | 9357 | int have_address = 0; |
d8041cc8 RH |
9358 | enum dwarf_location_atom op; |
9359 | ||
9360 | /* ??? Most of the time we do not take proper care for sign/zero | |
9361 | extending the values properly. Hopefully this won't be a real | |
9362 | problem... */ | |
9363 | ||
9364 | switch (TREE_CODE (loc)) | |
9365 | { | |
9366 | case ERROR_MARK: | |
e7af1d45 | 9367 | return 0; |
d8041cc8 | 9368 | |
e7af1d45 | 9369 | case PLACEHOLDER_EXPR: |
b4ae5201 RK |
9370 | /* This case involves extracting fields from an object to determine the |
9371 | position of other fields. We don't try to encode this here. The | |
9372 | only user of this is Ada, which encodes the needed information using | |
9373 | the names of types. */ | |
e7af1d45 | 9374 | return 0; |
b4ae5201 | 9375 | |
aea9695c RK |
9376 | case CALL_EXPR: |
9377 | return 0; | |
9378 | ||
4ada538b MM |
9379 | case PREINCREMENT_EXPR: |
9380 | case PREDECREMENT_EXPR: | |
9381 | case POSTINCREMENT_EXPR: | |
9382 | case POSTDECREMENT_EXPR: | |
9383 | /* There are no opcodes for these operations. */ | |
9384 | return 0; | |
9385 | ||
aea9695c | 9386 | case ADDR_EXPR: |
1a186ec5 RH |
9387 | /* If we already want an address, there's nothing we can do. */ |
9388 | if (want_address) | |
9389 | return 0; | |
aea9695c | 9390 | |
1a186ec5 RH |
9391 | /* Otherwise, process the argument and look for the address. */ |
9392 | return loc_descriptor_from_tree_1 (TREE_OPERAND (loc, 0), 1); | |
aea9695c | 9393 | |
d8041cc8 | 9394 | case VAR_DECL: |
c2f7fa15 | 9395 | if (DECL_THREAD_LOCAL_P (loc)) |
b9203463 RH |
9396 | { |
9397 | rtx rtl; | |
9398 | ||
b9203463 | 9399 | /* If this is not defined, we have no way to emit the data. */ |
8893239d | 9400 | if (!targetm.have_tls || !targetm.asm_out.output_dwarf_dtprel) |
fdbe66f2 | 9401 | return 0; |
b9203463 RH |
9402 | |
9403 | /* The way DW_OP_GNU_push_tls_address is specified, we can only | |
9404 | look up addresses of objects in the current module. */ | |
3c655f42 | 9405 | if (DECL_EXTERNAL (loc)) |
b9203463 RH |
9406 | return 0; |
9407 | ||
9408 | rtl = rtl_for_decl_location (loc); | |
9409 | if (rtl == NULL_RTX) | |
9410 | return 0; | |
9411 | ||
3c0cb5de | 9412 | if (!MEM_P (rtl)) |
b9203463 RH |
9413 | return 0; |
9414 | rtl = XEXP (rtl, 0); | |
9415 | if (! CONSTANT_P (rtl)) | |
9416 | return 0; | |
9417 | ||
9418 | ret = new_loc_descr (INTERNAL_DW_OP_tls_addr, 0, 0); | |
9419 | ret->dw_loc_oprnd1.val_class = dw_val_class_addr; | |
9420 | ret->dw_loc_oprnd1.v.val_addr = rtl; | |
9421 | ||
9422 | ret1 = new_loc_descr (DW_OP_GNU_push_tls_address, 0, 0); | |
9423 | add_loc_descr (&ret, ret1); | |
9424 | ||
1a186ec5 | 9425 | have_address = 1; |
b9203463 RH |
9426 | break; |
9427 | } | |
1a186ec5 | 9428 | /* FALLTHRU */ |
b9203463 | 9429 | |
d8041cc8 | 9430 | case PARM_DECL: |
833b3afe DB |
9431 | if (DECL_HAS_VALUE_EXPR_P (loc)) |
9432 | return loc_descriptor_from_tree_1 (DECL_VALUE_EXPR (loc), | |
9433 | want_address); | |
1a186ec5 RH |
9434 | /* FALLTHRU */ |
9435 | ||
6de9cd9a | 9436 | case RESULT_DECL: |
3c3f1a6f | 9437 | case FUNCTION_DECL: |
d8041cc8 RH |
9438 | { |
9439 | rtx rtl = rtl_for_decl_location (loc); | |
d8041cc8 | 9440 | |
a97c9600 | 9441 | if (rtl == NULL_RTX) |
e7af1d45 | 9442 | return 0; |
2878ea73 | 9443 | else if (GET_CODE (rtl) == CONST_INT) |
1a186ec5 RH |
9444 | { |
9445 | HOST_WIDE_INT val = INTVAL (rtl); | |
9446 | if (TYPE_UNSIGNED (TREE_TYPE (loc))) | |
9447 | val &= GET_MODE_MASK (DECL_MODE (loc)); | |
9448 | ret = int_loc_descriptor (val); | |
9449 | } | |
9450 | else if (GET_CODE (rtl) == CONST_STRING) | |
9451 | return 0; | |
a97c9600 | 9452 | else if (CONSTANT_P (rtl)) |
d8041cc8 RH |
9453 | { |
9454 | ret = new_loc_descr (DW_OP_addr, 0, 0); | |
9455 | ret->dw_loc_oprnd1.val_class = dw_val_class_addr; | |
9456 | ret->dw_loc_oprnd1.v.val_addr = rtl; | |
d8041cc8 RH |
9457 | } |
9458 | else | |
9459 | { | |
1a186ec5 RH |
9460 | enum machine_mode mode; |
9461 | ||
9462 | /* Certain constructs can only be represented at top-level. */ | |
9463 | if (want_address == 2) | |
62760ffd | 9464 | return loc_descriptor (rtl, VAR_INIT_STATUS_INITIALIZED); |
c28abdf0 | 9465 | |
1a186ec5 | 9466 | mode = GET_MODE (rtl); |
3c0cb5de | 9467 | if (MEM_P (rtl)) |
d8041cc8 | 9468 | { |
d8041cc8 | 9469 | rtl = XEXP (rtl, 0); |
1a186ec5 | 9470 | have_address = 1; |
d8041cc8 | 9471 | } |
62760ffd | 9472 | ret = mem_loc_descriptor (rtl, mode, VAR_INIT_STATUS_INITIALIZED); |
d8041cc8 RH |
9473 | } |
9474 | } | |
9475 | break; | |
9476 | ||
9477 | case INDIRECT_REF: | |
1a186ec5 RH |
9478 | ret = loc_descriptor_from_tree_1 (TREE_OPERAND (loc, 0), 0); |
9479 | have_address = 1; | |
d8041cc8 RH |
9480 | break; |
9481 | ||
749552c4 | 9482 | case COMPOUND_EXPR: |
1a186ec5 | 9483 | return loc_descriptor_from_tree_1 (TREE_OPERAND (loc, 1), want_address); |
749552c4 | 9484 | |
ed972b14 RK |
9485 | case NOP_EXPR: |
9486 | case CONVERT_EXPR: | |
9487 | case NON_LVALUE_EXPR: | |
ed239f5a | 9488 | case VIEW_CONVERT_EXPR: |
b4ae5201 | 9489 | case SAVE_EXPR: |
07beea0d AH |
9490 | case GIMPLE_MODIFY_STMT: |
9491 | return loc_descriptor_from_tree_1 (GENERIC_TREE_OPERAND (loc, 0), | |
9492 | want_address); | |
e57cabac | 9493 | |
d8041cc8 RH |
9494 | case COMPONENT_REF: |
9495 | case BIT_FIELD_REF: | |
9496 | case ARRAY_REF: | |
b4e3fabb | 9497 | case ARRAY_RANGE_REF: |
d8041cc8 RH |
9498 | { |
9499 | tree obj, offset; | |
9500 | HOST_WIDE_INT bitsize, bitpos, bytepos; | |
9501 | enum machine_mode mode; | |
9502 | int volatilep; | |
953ff289 | 9503 | int unsignedp = TYPE_UNSIGNED (TREE_TYPE (loc)); |
d8041cc8 RH |
9504 | |
9505 | obj = get_inner_reference (loc, &bitsize, &bitpos, &offset, &mode, | |
2614034e | 9506 | &unsignedp, &volatilep, false); |
e7af1d45 RK |
9507 | |
9508 | if (obj == loc) | |
9509 | return 0; | |
9510 | ||
1a186ec5 | 9511 | ret = loc_descriptor_from_tree_1 (obj, 1); |
e7af1d45 | 9512 | if (ret == 0 |
2ad9852d | 9513 | || bitpos % BITS_PER_UNIT != 0 || bitsize % BITS_PER_UNIT != 0) |
e7af1d45 | 9514 | return 0; |
d8041cc8 RH |
9515 | |
9516 | if (offset != NULL_TREE) | |
9517 | { | |
9518 | /* Variable offset. */ | |
1a186ec5 | 9519 | add_loc_descr (&ret, loc_descriptor_from_tree_1 (offset, 0)); |
d8041cc8 RH |
9520 | add_loc_descr (&ret, new_loc_descr (DW_OP_plus, 0, 0)); |
9521 | } | |
9522 | ||
d8041cc8 RH |
9523 | bytepos = bitpos / BITS_PER_UNIT; |
9524 | if (bytepos > 0) | |
9525 | add_loc_descr (&ret, new_loc_descr (DW_OP_plus_uconst, bytepos, 0)); | |
9526 | else if (bytepos < 0) | |
9527 | { | |
9528 | add_loc_descr (&ret, int_loc_descriptor (bytepos)); | |
9529 | add_loc_descr (&ret, new_loc_descr (DW_OP_plus, 0, 0)); | |
9530 | } | |
1a186ec5 RH |
9531 | |
9532 | have_address = 1; | |
d8041cc8 RH |
9533 | break; |
9534 | } | |
9535 | ||
9536 | case INTEGER_CST: | |
9537 | if (host_integerp (loc, 0)) | |
9538 | ret = int_loc_descriptor (tree_low_cst (loc, 0)); | |
e7af1d45 RK |
9539 | else |
9540 | return 0; | |
d8041cc8 | 9541 | break; |
d8041cc8 | 9542 | |
c67b2a58 RK |
9543 | case CONSTRUCTOR: |
9544 | { | |
75c20980 RH |
9545 | /* Get an RTL for this, if something has been emitted. */ |
9546 | rtx rtl = lookup_constant_def (loc); | |
9547 | enum machine_mode mode; | |
9548 | ||
1a186ec5 | 9549 | if (!rtl || !MEM_P (rtl)) |
75c20980 RH |
9550 | return 0; |
9551 | mode = GET_MODE (rtl); | |
9552 | rtl = XEXP (rtl, 0); | |
62760ffd | 9553 | ret = mem_loc_descriptor (rtl, mode, VAR_INIT_STATUS_INITIALIZED); |
1a186ec5 | 9554 | have_address = 1; |
c67b2a58 RK |
9555 | break; |
9556 | } | |
9557 | ||
c26fbbca | 9558 | case TRUTH_AND_EXPR: |
9702143f | 9559 | case TRUTH_ANDIF_EXPR: |
d8041cc8 RH |
9560 | case BIT_AND_EXPR: |
9561 | op = DW_OP_and; | |
9562 | goto do_binop; | |
e7af1d45 | 9563 | |
9702143f | 9564 | case TRUTH_XOR_EXPR: |
d8041cc8 RH |
9565 | case BIT_XOR_EXPR: |
9566 | op = DW_OP_xor; | |
9567 | goto do_binop; | |
e7af1d45 | 9568 | |
9702143f RK |
9569 | case TRUTH_OR_EXPR: |
9570 | case TRUTH_ORIF_EXPR: | |
d8041cc8 RH |
9571 | case BIT_IOR_EXPR: |
9572 | op = DW_OP_or; | |
9573 | goto do_binop; | |
e7af1d45 | 9574 | |
8dcea3f3 VC |
9575 | case FLOOR_DIV_EXPR: |
9576 | case CEIL_DIV_EXPR: | |
9577 | case ROUND_DIV_EXPR: | |
d8041cc8 RH |
9578 | case TRUNC_DIV_EXPR: |
9579 | op = DW_OP_div; | |
9580 | goto do_binop; | |
e7af1d45 | 9581 | |
d8041cc8 RH |
9582 | case MINUS_EXPR: |
9583 | op = DW_OP_minus; | |
9584 | goto do_binop; | |
e7af1d45 | 9585 | |
8dcea3f3 VC |
9586 | case FLOOR_MOD_EXPR: |
9587 | case CEIL_MOD_EXPR: | |
9588 | case ROUND_MOD_EXPR: | |
d8041cc8 RH |
9589 | case TRUNC_MOD_EXPR: |
9590 | op = DW_OP_mod; | |
9591 | goto do_binop; | |
e7af1d45 | 9592 | |
d8041cc8 RH |
9593 | case MULT_EXPR: |
9594 | op = DW_OP_mul; | |
9595 | goto do_binop; | |
e7af1d45 | 9596 | |
d8041cc8 RH |
9597 | case LSHIFT_EXPR: |
9598 | op = DW_OP_shl; | |
9599 | goto do_binop; | |
e7af1d45 | 9600 | |
d8041cc8 | 9601 | case RSHIFT_EXPR: |
953ff289 | 9602 | op = (TYPE_UNSIGNED (TREE_TYPE (loc)) ? DW_OP_shr : DW_OP_shra); |
d8041cc8 | 9603 | goto do_binop; |
e7af1d45 | 9604 | |
5be014d5 | 9605 | case POINTER_PLUS_EXPR: |
d8041cc8 RH |
9606 | case PLUS_EXPR: |
9607 | if (TREE_CODE (TREE_OPERAND (loc, 1)) == INTEGER_CST | |
9608 | && host_integerp (TREE_OPERAND (loc, 1), 0)) | |
9609 | { | |
1a186ec5 | 9610 | ret = loc_descriptor_from_tree_1 (TREE_OPERAND (loc, 0), 0); |
e7af1d45 RK |
9611 | if (ret == 0) |
9612 | return 0; | |
9613 | ||
d8041cc8 RH |
9614 | add_loc_descr (&ret, |
9615 | new_loc_descr (DW_OP_plus_uconst, | |
9616 | tree_low_cst (TREE_OPERAND (loc, 1), | |
9617 | 0), | |
9618 | 0)); | |
9619 | break; | |
9620 | } | |
e7af1d45 | 9621 | |
d8041cc8 RH |
9622 | op = DW_OP_plus; |
9623 | goto do_binop; | |
2ad9852d | 9624 | |
d8041cc8 | 9625 | case LE_EXPR: |
8df83eae | 9626 | if (TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (loc, 0)))) |
e7af1d45 RK |
9627 | return 0; |
9628 | ||
d8041cc8 RH |
9629 | op = DW_OP_le; |
9630 | goto do_binop; | |
e7af1d45 | 9631 | |
d8041cc8 | 9632 | case GE_EXPR: |
8df83eae | 9633 | if (TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (loc, 0)))) |
e7af1d45 RK |
9634 | return 0; |
9635 | ||
d8041cc8 RH |
9636 | op = DW_OP_ge; |
9637 | goto do_binop; | |
e7af1d45 | 9638 | |
d8041cc8 | 9639 | case LT_EXPR: |
8df83eae | 9640 | if (TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (loc, 0)))) |
e7af1d45 RK |
9641 | return 0; |
9642 | ||
d8041cc8 RH |
9643 | op = DW_OP_lt; |
9644 | goto do_binop; | |
e7af1d45 | 9645 | |
d8041cc8 | 9646 | case GT_EXPR: |
8df83eae | 9647 | if (TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (loc, 0)))) |
e7af1d45 RK |
9648 | return 0; |
9649 | ||
d8041cc8 RH |
9650 | op = DW_OP_gt; |
9651 | goto do_binop; | |
e7af1d45 | 9652 | |
d8041cc8 RH |
9653 | case EQ_EXPR: |
9654 | op = DW_OP_eq; | |
9655 | goto do_binop; | |
e7af1d45 | 9656 | |
d8041cc8 RH |
9657 | case NE_EXPR: |
9658 | op = DW_OP_ne; | |
9659 | goto do_binop; | |
9660 | ||
9661 | do_binop: | |
1a186ec5 RH |
9662 | ret = loc_descriptor_from_tree_1 (TREE_OPERAND (loc, 0), 0); |
9663 | ret1 = loc_descriptor_from_tree_1 (TREE_OPERAND (loc, 1), 0); | |
e7af1d45 RK |
9664 | if (ret == 0 || ret1 == 0) |
9665 | return 0; | |
9666 | ||
9667 | add_loc_descr (&ret, ret1); | |
d8041cc8 RH |
9668 | add_loc_descr (&ret, new_loc_descr (op, 0, 0)); |
9669 | break; | |
9670 | ||
9702143f | 9671 | case TRUTH_NOT_EXPR: |
d8041cc8 RH |
9672 | case BIT_NOT_EXPR: |
9673 | op = DW_OP_not; | |
9674 | goto do_unop; | |
e7af1d45 | 9675 | |
d8041cc8 RH |
9676 | case ABS_EXPR: |
9677 | op = DW_OP_abs; | |
9678 | goto do_unop; | |
e7af1d45 | 9679 | |
d8041cc8 RH |
9680 | case NEGATE_EXPR: |
9681 | op = DW_OP_neg; | |
9682 | goto do_unop; | |
9683 | ||
9684 | do_unop: | |
1a186ec5 | 9685 | ret = loc_descriptor_from_tree_1 (TREE_OPERAND (loc, 0), 0); |
e7af1d45 RK |
9686 | if (ret == 0) |
9687 | return 0; | |
9688 | ||
d8041cc8 RH |
9689 | add_loc_descr (&ret, new_loc_descr (op, 0, 0)); |
9690 | break; | |
9691 | ||
fd5580cb | 9692 | case MIN_EXPR: |
d8041cc8 | 9693 | case MAX_EXPR: |
fd5580cb | 9694 | { |
2878ea73 MS |
9695 | const enum tree_code code = |
9696 | TREE_CODE (loc) == MIN_EXPR ? GT_EXPR : LT_EXPR; | |
fd5580cb | 9697 | |
2878ea73 | 9698 | loc = build3 (COND_EXPR, TREE_TYPE (loc), |
3244e67d RS |
9699 | build2 (code, integer_type_node, |
9700 | TREE_OPERAND (loc, 0), TREE_OPERAND (loc, 1)), | |
2878ea73 | 9701 | TREE_OPERAND (loc, 1), TREE_OPERAND (loc, 0)); |
fd5580cb | 9702 | } |
2ad9852d | 9703 | |
3ef42a0c | 9704 | /* ... fall through ... */ |
d8041cc8 RH |
9705 | |
9706 | case COND_EXPR: | |
9707 | { | |
e7af1d45 | 9708 | dw_loc_descr_ref lhs |
1a186ec5 | 9709 | = loc_descriptor_from_tree_1 (TREE_OPERAND (loc, 1), 0); |
e7af1d45 | 9710 | dw_loc_descr_ref rhs |
1a186ec5 | 9711 | = loc_descriptor_from_tree_1 (TREE_OPERAND (loc, 2), 0); |
d8041cc8 RH |
9712 | dw_loc_descr_ref bra_node, jump_node, tmp; |
9713 | ||
1a186ec5 | 9714 | ret = loc_descriptor_from_tree_1 (TREE_OPERAND (loc, 0), 0); |
e7af1d45 RK |
9715 | if (ret == 0 || lhs == 0 || rhs == 0) |
9716 | return 0; | |
9717 | ||
d8041cc8 RH |
9718 | bra_node = new_loc_descr (DW_OP_bra, 0, 0); |
9719 | add_loc_descr (&ret, bra_node); | |
9720 | ||
e7af1d45 | 9721 | add_loc_descr (&ret, rhs); |
d8041cc8 RH |
9722 | jump_node = new_loc_descr (DW_OP_skip, 0, 0); |
9723 | add_loc_descr (&ret, jump_node); | |
9724 | ||
e7af1d45 | 9725 | add_loc_descr (&ret, lhs); |
d8041cc8 | 9726 | bra_node->dw_loc_oprnd1.val_class = dw_val_class_loc; |
e7af1d45 | 9727 | bra_node->dw_loc_oprnd1.v.val_loc = lhs; |
d8041cc8 RH |
9728 | |
9729 | /* ??? Need a node to point the skip at. Use a nop. */ | |
9730 | tmp = new_loc_descr (DW_OP_nop, 0, 0); | |
9731 | add_loc_descr (&ret, tmp); | |
9732 | jump_node->dw_loc_oprnd1.val_class = dw_val_class_loc; | |
9733 | jump_node->dw_loc_oprnd1.v.val_loc = tmp; | |
9734 | } | |
9735 | break; | |
9736 | ||
0ba6c56d | 9737 | case FIX_TRUNC_EXPR: |
0ba6c56d RH |
9738 | return 0; |
9739 | ||
d8041cc8 | 9740 | default: |
7d445f15 RH |
9741 | /* Leave front-end specific codes as simply unknown. This comes |
9742 | up, for instance, with the C STMT_EXPR. */ | |
9743 | if ((unsigned int) TREE_CODE (loc) | |
2878ea73 | 9744 | >= (unsigned int) LAST_AND_UNUSED_TREE_CODE) |
7d445f15 RH |
9745 | return 0; |
9746 | ||
c3f216e2 | 9747 | #ifdef ENABLE_CHECKING |
7d445f15 | 9748 | /* Otherwise this is a generic code; we should just lists all of |
535a42b1 | 9749 | these explicitly. We forgot one. */ |
ced3f397 | 9750 | gcc_unreachable (); |
c3f216e2 MM |
9751 | #else |
9752 | /* In a release build, we want to degrade gracefully: better to | |
9753 | generate incomplete debugging information than to crash. */ | |
9754 | return NULL; | |
9755 | #endif | |
d8041cc8 RH |
9756 | } |
9757 | ||
e7af1d45 | 9758 | /* Show if we can't fill the request for an address. */ |
1a186ec5 | 9759 | if (want_address && !have_address) |
e7af1d45 | 9760 | return 0; |
d8041cc8 RH |
9761 | |
9762 | /* If we've got an address and don't want one, dereference. */ | |
434eba35 | 9763 | if (!want_address && have_address && ret) |
d8041cc8 | 9764 | { |
e7af1d45 RK |
9765 | HOST_WIDE_INT size = int_size_in_bytes (TREE_TYPE (loc)); |
9766 | ||
9767 | if (size > DWARF2_ADDR_SIZE || size == -1) | |
9768 | return 0; | |
2ad9852d | 9769 | else if (size == DWARF2_ADDR_SIZE) |
d8041cc8 RH |
9770 | op = DW_OP_deref; |
9771 | else | |
9772 | op = DW_OP_deref_size; | |
e7af1d45 RK |
9773 | |
9774 | add_loc_descr (&ret, new_loc_descr (op, size, 0)); | |
d8041cc8 RH |
9775 | } |
9776 | ||
9777 | return ret; | |
9778 | } | |
9779 | ||
1a186ec5 RH |
9780 | static inline dw_loc_descr_ref |
9781 | loc_descriptor_from_tree (tree loc) | |
9782 | { | |
9783 | return loc_descriptor_from_tree_1 (loc, 2); | |
9784 | } | |
9785 | ||
665f2503 | 9786 | /* Given a value, round it up to the lowest multiple of `boundary' |
a3f97cbb | 9787 | which is not less than the value itself. */ |
71dfc51f | 9788 | |
665f2503 | 9789 | static inline HOST_WIDE_INT |
7080f735 | 9790 | ceiling (HOST_WIDE_INT value, unsigned int boundary) |
a3f97cbb JW |
9791 | { |
9792 | return (((value + boundary - 1) / boundary) * boundary); | |
9793 | } | |
9794 | ||
9795 | /* Given a pointer to what is assumed to be a FIELD_DECL node, return a | |
9796 | pointer to the declared type for the relevant field variable, or return | |
9797 | `integer_type_node' if the given node turns out to be an | |
9798 | ERROR_MARK node. */ | |
71dfc51f RK |
9799 | |
9800 | static inline tree | |
7080f735 | 9801 | field_type (tree decl) |
a3f97cbb | 9802 | { |
b3694847 | 9803 | tree type; |
a3f97cbb JW |
9804 | |
9805 | if (TREE_CODE (decl) == ERROR_MARK) | |
9806 | return integer_type_node; | |
9807 | ||
9808 | type = DECL_BIT_FIELD_TYPE (decl); | |
71dfc51f | 9809 | if (type == NULL_TREE) |
a3f97cbb JW |
9810 | type = TREE_TYPE (decl); |
9811 | ||
9812 | return type; | |
9813 | } | |
9814 | ||
5f446d21 DD |
9815 | /* Given a pointer to a tree node, return the alignment in bits for |
9816 | it, or else return BITS_PER_WORD if the node actually turns out to | |
9817 | be an ERROR_MARK node. */ | |
71dfc51f RK |
9818 | |
9819 | static inline unsigned | |
7080f735 | 9820 | simple_type_align_in_bits (tree type) |
a3f97cbb JW |
9821 | { |
9822 | return (TREE_CODE (type) != ERROR_MARK) ? TYPE_ALIGN (type) : BITS_PER_WORD; | |
9823 | } | |
9824 | ||
5f446d21 | 9825 | static inline unsigned |
7080f735 | 9826 | simple_decl_align_in_bits (tree decl) |
5f446d21 DD |
9827 | { |
9828 | return (TREE_CODE (decl) != ERROR_MARK) ? DECL_ALIGN (decl) : BITS_PER_WORD; | |
9829 | } | |
9830 | ||
d996473d EB |
9831 | /* Return the result of rounding T up to ALIGN. */ |
9832 | ||
9833 | static inline HOST_WIDE_INT | |
9834 | round_up_to_align (HOST_WIDE_INT t, unsigned int align) | |
9835 | { | |
9836 | /* We must be careful if T is negative because HOST_WIDE_INT can be | |
9837 | either "above" or "below" unsigned int as per the C promotion | |
9838 | rules, depending on the host, thus making the signedness of the | |
9839 | direct multiplication and division unpredictable. */ | |
9840 | unsigned HOST_WIDE_INT u = (unsigned HOST_WIDE_INT) t; | |
9841 | ||
9842 | u += align - 1; | |
9843 | u /= align; | |
9844 | u *= align; | |
9845 | ||
9846 | return (HOST_WIDE_INT) u; | |
9847 | } | |
9848 | ||
2ad9852d RK |
9849 | /* Given a pointer to a FIELD_DECL, compute and return the byte offset of the |
9850 | lowest addressed byte of the "containing object" for the given FIELD_DECL, | |
9851 | or return 0 if we are unable to determine what that offset is, either | |
9852 | because the argument turns out to be a pointer to an ERROR_MARK node, or | |
9853 | because the offset is actually variable. (We can't handle the latter case | |
9854 | just yet). */ | |
71dfc51f | 9855 | |
665f2503 | 9856 | static HOST_WIDE_INT |
7080f735 | 9857 | field_byte_offset (tree decl) |
a3f97cbb | 9858 | { |
665f2503 | 9859 | HOST_WIDE_INT object_offset_in_bits; |
665f2503 | 9860 | HOST_WIDE_INT bitpos_int; |
a3f97cbb JW |
9861 | |
9862 | if (TREE_CODE (decl) == ERROR_MARK) | |
9863 | return 0; | |
a1c496cb | 9864 | |
ced3f397 | 9865 | gcc_assert (TREE_CODE (decl) == FIELD_DECL); |
a3f97cbb | 9866 | |
556273e0 | 9867 | /* We cannot yet cope with fields whose positions are variable, so |
a3f97cbb JW |
9868 | for now, when we see such things, we simply return 0. Someday, we may |
9869 | be able to handle such cases, but it will be damn difficult. */ | |
665f2503 | 9870 | if (! host_integerp (bit_position (decl), 0)) |
a3f97cbb | 9871 | return 0; |
14a774a9 | 9872 | |
665f2503 | 9873 | bitpos_int = int_bit_position (decl); |
a3f97cbb | 9874 | |
cd0a10dd NF |
9875 | #ifdef PCC_BITFIELD_TYPE_MATTERS |
9876 | if (PCC_BITFIELD_TYPE_MATTERS) | |
9877 | { | |
9878 | tree type; | |
9879 | tree field_size_tree; | |
9880 | HOST_WIDE_INT deepest_bitpos; | |
9881 | unsigned HOST_WIDE_INT field_size_in_bits; | |
9882 | unsigned int type_align_in_bits; | |
9883 | unsigned int decl_align_in_bits; | |
9884 | unsigned HOST_WIDE_INT type_size_in_bits; | |
a3f97cbb | 9885 | |
cd0a10dd NF |
9886 | type = field_type (decl); |
9887 | field_size_tree = DECL_SIZE (decl); | |
a3f97cbb | 9888 | |
cd0a10dd NF |
9889 | /* The size could be unspecified if there was an error, or for |
9890 | a flexible array member. */ | |
9891 | if (! field_size_tree) | |
9892 | field_size_tree = bitsize_zero_node; | |
9893 | ||
9894 | /* If we don't know the size of the field, pretend it's a full word. */ | |
9895 | if (host_integerp (field_size_tree, 1)) | |
9896 | field_size_in_bits = tree_low_cst (field_size_tree, 1); | |
9897 | else | |
9898 | field_size_in_bits = BITS_PER_WORD; | |
9899 | ||
9900 | type_size_in_bits = simple_type_size_in_bits (type); | |
9901 | type_align_in_bits = simple_type_align_in_bits (type); | |
9902 | decl_align_in_bits = simple_decl_align_in_bits (decl); | |
9903 | ||
9904 | /* The GCC front-end doesn't make any attempt to keep track of the | |
9905 | starting bit offset (relative to the start of the containing | |
9906 | structure type) of the hypothetical "containing object" for a | |
9907 | bit-field. Thus, when computing the byte offset value for the | |
9908 | start of the "containing object" of a bit-field, we must deduce | |
9909 | this information on our own. This can be rather tricky to do in | |
9910 | some cases. For example, handling the following structure type | |
9911 | definition when compiling for an i386/i486 target (which only | |
9912 | aligns long long's to 32-bit boundaries) can be very tricky: | |
a3f97cbb JW |
9913 | |
9914 | struct S { int field1; long long field2:31; }; | |
9915 | ||
cd0a10dd NF |
9916 | Fortunately, there is a simple rule-of-thumb which can be used |
9917 | in such cases. When compiling for an i386/i486, GCC will | |
9918 | allocate 8 bytes for the structure shown above. It decides to | |
9919 | do this based upon one simple rule for bit-field allocation. | |
9920 | GCC allocates each "containing object" for each bit-field at | |
9921 | the first (i.e. lowest addressed) legitimate alignment boundary | |
9922 | (based upon the required minimum alignment for the declared | |
9923 | type of the field) which it can possibly use, subject to the | |
9924 | condition that there is still enough available space remaining | |
9925 | in the containing object (when allocated at the selected point) | |
9926 | to fully accommodate all of the bits of the bit-field itself. | |
9927 | ||
9928 | This simple rule makes it obvious why GCC allocates 8 bytes for | |
9929 | each object of the structure type shown above. When looking | |
9930 | for a place to allocate the "containing object" for `field2', | |
9931 | the compiler simply tries to allocate a 64-bit "containing | |
9932 | object" at each successive 32-bit boundary (starting at zero) | |
9933 | until it finds a place to allocate that 64- bit field such that | |
9934 | at least 31 contiguous (and previously unallocated) bits remain | |
9935 | within that selected 64 bit field. (As it turns out, for the | |
9936 | example above, the compiler finds it is OK to allocate the | |
9937 | "containing object" 64-bit field at bit-offset zero within the | |
9938 | structure type.) | |
9939 | ||
9940 | Here we attempt to work backwards from the limited set of facts | |
9941 | we're given, and we try to deduce from those facts, where GCC | |
9942 | must have believed that the containing object started (within | |
9943 | the structure type). The value we deduce is then used (by the | |
9944 | callers of this routine) to generate DW_AT_location and | |
9945 | DW_AT_bit_offset attributes for fields (both bit-fields and, in | |
9946 | the case of DW_AT_location, regular fields as well). */ | |
9947 | ||
9948 | /* Figure out the bit-distance from the start of the structure to | |
9949 | the "deepest" bit of the bit-field. */ | |
9950 | deepest_bitpos = bitpos_int + field_size_in_bits; | |
9951 | ||
9952 | /* This is the tricky part. Use some fancy footwork to deduce | |
9953 | where the lowest addressed bit of the containing object must | |
9954 | be. */ | |
5f446d21 DD |
9955 | object_offset_in_bits = deepest_bitpos - type_size_in_bits; |
9956 | ||
cd0a10dd NF |
9957 | /* Round up to type_align by default. This works best for |
9958 | bitfields. */ | |
d996473d | 9959 | object_offset_in_bits |
cd0a10dd NF |
9960 | = round_up_to_align (object_offset_in_bits, type_align_in_bits); |
9961 | ||
9962 | if (object_offset_in_bits > bitpos_int) | |
9963 | { | |
9964 | object_offset_in_bits = deepest_bitpos - type_size_in_bits; | |
9965 | ||
9966 | /* Round up to decl_align instead. */ | |
9967 | object_offset_in_bits | |
9968 | = round_up_to_align (object_offset_in_bits, decl_align_in_bits); | |
9969 | } | |
5f446d21 | 9970 | } |
cd0a10dd NF |
9971 | else |
9972 | #endif | |
9973 | object_offset_in_bits = bitpos_int; | |
a3f97cbb | 9974 | |
2ad9852d | 9975 | return object_offset_in_bits / BITS_PER_UNIT; |
a3f97cbb | 9976 | } |
a3f97cbb | 9977 | \f |
71dfc51f RK |
9978 | /* The following routines define various Dwarf attributes and any data |
9979 | associated with them. */ | |
a3f97cbb | 9980 | |
ef76d03b | 9981 | /* Add a location description attribute value to a DIE. |
a3f97cbb | 9982 | |
ef76d03b | 9983 | This emits location attributes suitable for whole variables and |
a3f97cbb JW |
9984 | whole parameters. Note that the location attributes for struct fields are |
9985 | generated by the routine `data_member_location_attribute' below. */ | |
71dfc51f | 9986 | |
b9203463 | 9987 | static inline void |
7080f735 AJ |
9988 | add_AT_location_description (dw_die_ref die, enum dwarf_attribute attr_kind, |
9989 | dw_loc_descr_ref descr) | |
a3f97cbb | 9990 | { |
e7af1d45 RK |
9991 | if (descr != 0) |
9992 | add_AT_loc (die, attr_kind, descr); | |
a3f97cbb JW |
9993 | } |
9994 | ||
2ad9852d RK |
9995 | /* Attach the specialized form of location attribute used for data members of |
9996 | struct and union types. In the special case of a FIELD_DECL node which | |
9997 | represents a bit-field, the "offset" part of this special location | |
9998 | descriptor must indicate the distance in bytes from the lowest-addressed | |
9999 | byte of the containing struct or union type to the lowest-addressed byte of | |
10000 | the "containing object" for the bit-field. (See the `field_byte_offset' | |
10001 | function above). | |
10002 | ||
10003 | For any given bit-field, the "containing object" is a hypothetical object | |
10004 | (of some integral or enum type) within which the given bit-field lives. The | |
10005 | type of this hypothetical "containing object" is always the same as the | |
10006 | declared type of the individual bit-field itself (for GCC anyway... the | |
10007 | DWARF spec doesn't actually mandate this). Note that it is the size (in | |
10008 | bytes) of the hypothetical "containing object" which will be given in the | |
10009 | DW_AT_byte_size attribute for this bit-field. (See the | |
10010 | `byte_size_attribute' function below.) It is also used when calculating the | |
10011 | value of the DW_AT_bit_offset attribute. (See the `bit_offset_attribute' | |
10012 | function below.) */ | |
71dfc51f | 10013 | |
a3f97cbb | 10014 | static void |
7080f735 | 10015 | add_data_member_location_attribute (dw_die_ref die, tree decl) |
a3f97cbb | 10016 | { |
799f628a | 10017 | HOST_WIDE_INT offset; |
649ce3f2 | 10018 | dw_loc_descr_ref loc_descr = 0; |
a3f97cbb | 10019 | |
95b4aca6 | 10020 | if (TREE_CODE (decl) == TREE_BINFO) |
649ce3f2 JM |
10021 | { |
10022 | /* We're working on the TAG_inheritance for a base class. */ | |
809e3e7f | 10023 | if (BINFO_VIRTUAL_P (decl) && is_cxx ()) |
649ce3f2 JM |
10024 | { |
10025 | /* For C++ virtual bases we can't just use BINFO_OFFSET, as they | |
10026 | aren't at a fixed offset from all (sub)objects of the same | |
10027 | type. We need to extract the appropriate offset from our | |
10028 | vtable. The following dwarf expression means | |
10029 | ||
10030 | BaseAddr = ObAddr + *((*ObAddr) - Offset) | |
10031 | ||
10032 | This is specific to the V3 ABI, of course. */ | |
10033 | ||
10034 | dw_loc_descr_ref tmp; | |
2ad9852d | 10035 | |
649ce3f2 JM |
10036 | /* Make a copy of the object address. */ |
10037 | tmp = new_loc_descr (DW_OP_dup, 0, 0); | |
10038 | add_loc_descr (&loc_descr, tmp); | |
2ad9852d | 10039 | |
649ce3f2 JM |
10040 | /* Extract the vtable address. */ |
10041 | tmp = new_loc_descr (DW_OP_deref, 0, 0); | |
10042 | add_loc_descr (&loc_descr, tmp); | |
2ad9852d | 10043 | |
649ce3f2 JM |
10044 | /* Calculate the address of the offset. */ |
10045 | offset = tree_low_cst (BINFO_VPTR_FIELD (decl), 0); | |
ced3f397 | 10046 | gcc_assert (offset < 0); |
2ad9852d | 10047 | |
649ce3f2 JM |
10048 | tmp = int_loc_descriptor (-offset); |
10049 | add_loc_descr (&loc_descr, tmp); | |
10050 | tmp = new_loc_descr (DW_OP_minus, 0, 0); | |
10051 | add_loc_descr (&loc_descr, tmp); | |
2ad9852d | 10052 | |
649ce3f2 JM |
10053 | /* Extract the offset. */ |
10054 | tmp = new_loc_descr (DW_OP_deref, 0, 0); | |
10055 | add_loc_descr (&loc_descr, tmp); | |
2ad9852d | 10056 | |
649ce3f2 JM |
10057 | /* Add it to the object address. */ |
10058 | tmp = new_loc_descr (DW_OP_plus, 0, 0); | |
10059 | add_loc_descr (&loc_descr, tmp); | |
10060 | } | |
10061 | else | |
10062 | offset = tree_low_cst (BINFO_OFFSET (decl), 0); | |
10063 | } | |
61b32c02 JM |
10064 | else |
10065 | offset = field_byte_offset (decl); | |
10066 | ||
649ce3f2 JM |
10067 | if (! loc_descr) |
10068 | { | |
10069 | enum dwarf_location_atom op; | |
10070 | ||
2ad9852d RK |
10071 | /* The DWARF2 standard says that we should assume that the structure |
10072 | address is already on the stack, so we can specify a structure field | |
10073 | address by using DW_OP_plus_uconst. */ | |
71dfc51f | 10074 | |
a3f97cbb | 10075 | #ifdef MIPS_DEBUGGING_INFO |
2ad9852d RK |
10076 | /* ??? The SGI dwarf reader does not handle the DW_OP_plus_uconst |
10077 | operator correctly. It works only if we leave the offset on the | |
10078 | stack. */ | |
649ce3f2 | 10079 | op = DW_OP_constu; |
a3f97cbb | 10080 | #else |
649ce3f2 | 10081 | op = DW_OP_plus_uconst; |
a3f97cbb | 10082 | #endif |
71dfc51f | 10083 | |
649ce3f2 JM |
10084 | loc_descr = new_loc_descr (op, offset, 0); |
10085 | } | |
2ad9852d | 10086 | |
a3f97cbb JW |
10087 | add_AT_loc (die, DW_AT_data_member_location, loc_descr); |
10088 | } | |
10089 | ||
e7ee3914 AM |
10090 | /* Writes integer values to dw_vec_const array. */ |
10091 | ||
10092 | static void | |
10093 | insert_int (HOST_WIDE_INT val, unsigned int size, unsigned char *dest) | |
10094 | { | |
10095 | while (size != 0) | |
10096 | { | |
10097 | *dest++ = val & 0xff; | |
10098 | val >>= 8; | |
10099 | --size; | |
10100 | } | |
10101 | } | |
10102 | ||
10103 | /* Reads integers from dw_vec_const array. Inverse of insert_int. */ | |
10104 | ||
10105 | static HOST_WIDE_INT | |
10106 | extract_int (const unsigned char *src, unsigned int size) | |
10107 | { | |
10108 | HOST_WIDE_INT val = 0; | |
10109 | ||
10110 | src += size; | |
10111 | while (size != 0) | |
10112 | { | |
10113 | val <<= 8; | |
10114 | val |= *--src & 0xff; | |
10115 | --size; | |
10116 | } | |
10117 | return val; | |
10118 | } | |
10119 | ||
10120 | /* Writes floating point values to dw_vec_const array. */ | |
10121 | ||
10122 | static void | |
10123 | insert_float (rtx rtl, unsigned char *array) | |
10124 | { | |
10125 | REAL_VALUE_TYPE rv; | |
10126 | long val[4]; | |
10127 | int i; | |
10128 | ||
10129 | REAL_VALUE_FROM_CONST_DOUBLE (rv, rtl); | |
10130 | real_to_target (val, &rv, GET_MODE (rtl)); | |
10131 | ||
10132 | /* real_to_target puts 32-bit pieces in each long. Pack them. */ | |
10133 | for (i = 0; i < GET_MODE_SIZE (GET_MODE (rtl)) / 4; i++) | |
10134 | { | |
10135 | insert_int (val[i], 4, array); | |
10136 | array += 4; | |
10137 | } | |
10138 | } | |
10139 | ||
b20b352b | 10140 | /* Attach a DW_AT_const_value attribute for a variable or a parameter which |
a3f97cbb JW |
10141 | does not have a "location" either in memory or in a register. These |
10142 | things can arise in GNU C when a constant is passed as an actual parameter | |
10143 | to an inlined function. They can also arise in C++ where declared | |
10144 | constants do not necessarily get memory "homes". */ | |
71dfc51f | 10145 | |
a3f97cbb | 10146 | static void |
7080f735 | 10147 | add_const_value_attribute (dw_die_ref die, rtx rtl) |
a3f97cbb JW |
10148 | { |
10149 | switch (GET_CODE (rtl)) | |
10150 | { | |
10151 | case CONST_INT: | |
2e4b9b8c RH |
10152 | { |
10153 | HOST_WIDE_INT val = INTVAL (rtl); | |
c26fbbca | 10154 | |
799f628a JH |
10155 | if (val < 0) |
10156 | add_AT_int (die, DW_AT_const_value, val); | |
a1c496cb | 10157 | else |
799f628a | 10158 | add_AT_unsigned (die, DW_AT_const_value, (unsigned HOST_WIDE_INT) val); |
2e4b9b8c | 10159 | } |
a3f97cbb JW |
10160 | break; |
10161 | ||
10162 | case CONST_DOUBLE: | |
10163 | /* Note that a CONST_DOUBLE rtx could represent either an integer or a | |
73c68f61 SS |
10164 | floating-point constant. A CONST_DOUBLE is used whenever the |
10165 | constant requires more than one word in order to be adequately | |
10166 | represented. We output CONST_DOUBLEs as blocks. */ | |
469ac993 | 10167 | { |
b3694847 | 10168 | enum machine_mode mode = GET_MODE (rtl); |
469ac993 | 10169 | |
3d8bf70f | 10170 | if (SCALAR_FLOAT_MODE_P (mode)) |
469ac993 | 10171 | { |
e7ee3914 AM |
10172 | unsigned int length = GET_MODE_SIZE (mode); |
10173 | unsigned char *array = ggc_alloc (length); | |
469ac993 | 10174 | |
e7ee3914 AM |
10175 | insert_float (rtl, array); |
10176 | add_AT_vec (die, DW_AT_const_value, length / 4, 4, array); | |
469ac993 JM |
10177 | } |
10178 | else | |
2e4b9b8c RH |
10179 | { |
10180 | /* ??? We really should be using HOST_WIDE_INT throughout. */ | |
ced3f397 | 10181 | gcc_assert (HOST_BITS_PER_LONG == HOST_BITS_PER_WIDE_INT); |
2ad9852d | 10182 | |
2e4b9b8c RH |
10183 | add_AT_long_long (die, DW_AT_const_value, |
10184 | CONST_DOUBLE_HIGH (rtl), CONST_DOUBLE_LOW (rtl)); | |
10185 | } | |
469ac993 | 10186 | } |
a3f97cbb JW |
10187 | break; |
10188 | ||
e7ee3914 AM |
10189 | case CONST_VECTOR: |
10190 | { | |
10191 | enum machine_mode mode = GET_MODE (rtl); | |
10192 | unsigned int elt_size = GET_MODE_UNIT_SIZE (mode); | |
10193 | unsigned int length = CONST_VECTOR_NUNITS (rtl); | |
10194 | unsigned char *array = ggc_alloc (length * elt_size); | |
10195 | unsigned int i; | |
10196 | unsigned char *p; | |
10197 | ||
ced3f397 | 10198 | switch (GET_MODE_CLASS (mode)) |
e7ee3914 | 10199 | { |
ced3f397 | 10200 | case MODE_VECTOR_INT: |
e7ee3914 AM |
10201 | for (i = 0, p = array; i < length; i++, p += elt_size) |
10202 | { | |
10203 | rtx elt = CONST_VECTOR_ELT (rtl, i); | |
10204 | HOST_WIDE_INT lo, hi; | |
a1c496cb | 10205 | |
ced3f397 | 10206 | switch (GET_CODE (elt)) |
e7ee3914 | 10207 | { |
ced3f397 | 10208 | case CONST_INT: |
e7ee3914 AM |
10209 | lo = INTVAL (elt); |
10210 | hi = -(lo < 0); | |
ced3f397 | 10211 | break; |
a1c496cb | 10212 | |
ced3f397 | 10213 | case CONST_DOUBLE: |
e7ee3914 AM |
10214 | lo = CONST_DOUBLE_LOW (elt); |
10215 | hi = CONST_DOUBLE_HIGH (elt); | |
ced3f397 | 10216 | break; |
a1c496cb | 10217 | |
ced3f397 NS |
10218 | default: |
10219 | gcc_unreachable (); | |
e7ee3914 | 10220 | } |
a1c496cb | 10221 | |
e7ee3914 AM |
10222 | if (elt_size <= sizeof (HOST_WIDE_INT)) |
10223 | insert_int (lo, elt_size, p); | |
ced3f397 | 10224 | else |
e7ee3914 AM |
10225 | { |
10226 | unsigned char *p0 = p; | |
10227 | unsigned char *p1 = p + sizeof (HOST_WIDE_INT); | |
a1c496cb | 10228 | |
ced3f397 | 10229 | gcc_assert (elt_size == 2 * sizeof (HOST_WIDE_INT)); |
e7ee3914 AM |
10230 | if (WORDS_BIG_ENDIAN) |
10231 | { | |
10232 | p0 = p1; | |
10233 | p1 = p; | |
10234 | } | |
10235 | insert_int (lo, sizeof (HOST_WIDE_INT), p0); | |
10236 | insert_int (hi, sizeof (HOST_WIDE_INT), p1); | |
10237 | } | |
e7ee3914 | 10238 | } |
ced3f397 NS |
10239 | break; |
10240 | ||
10241 | case MODE_VECTOR_FLOAT: | |
e7ee3914 AM |
10242 | for (i = 0, p = array; i < length; i++, p += elt_size) |
10243 | { | |
10244 | rtx elt = CONST_VECTOR_ELT (rtl, i); | |
10245 | insert_float (elt, p); | |
10246 | } | |
ced3f397 NS |
10247 | break; |
10248 | ||
10249 | default: | |
10250 | gcc_unreachable (); | |
e7ee3914 | 10251 | } |
e7ee3914 AM |
10252 | |
10253 | add_AT_vec (die, DW_AT_const_value, length, elt_size, array); | |
10254 | } | |
10255 | break; | |
10256 | ||
a3f97cbb JW |
10257 | case CONST_STRING: |
10258 | add_AT_string (die, DW_AT_const_value, XSTR (rtl, 0)); | |
10259 | break; | |
10260 | ||
10261 | case SYMBOL_REF: | |
10262 | case LABEL_REF: | |
10263 | case CONST: | |
c470afad | 10264 | add_AT_addr (die, DW_AT_const_value, rtl); |
a1bbd445 | 10265 | VEC_safe_push (rtx, gc, used_rtx_array, rtl); |
a3f97cbb JW |
10266 | break; |
10267 | ||
10268 | case PLUS: | |
10269 | /* In cases where an inlined instance of an inline function is passed | |
73c68f61 SS |
10270 | the address of an `auto' variable (which is local to the caller) we |
10271 | can get a situation where the DECL_RTL of the artificial local | |
10272 | variable (for the inlining) which acts as a stand-in for the | |
10273 | corresponding formal parameter (of the inline function) will look | |
10274 | like (plus:SI (reg:SI FRAME_PTR) (const_int ...)). This is not | |
10275 | exactly a compile-time constant expression, but it isn't the address | |
10276 | of the (artificial) local variable either. Rather, it represents the | |
10277 | *value* which the artificial local variable always has during its | |
10278 | lifetime. We currently have no way to represent such quasi-constant | |
10279 | values in Dwarf, so for now we just punt and generate nothing. */ | |
a3f97cbb JW |
10280 | break; |
10281 | ||
10282 | default: | |
10283 | /* No other kinds of rtx should be possible here. */ | |
ced3f397 | 10284 | gcc_unreachable (); |
a3f97cbb JW |
10285 | } |
10286 | ||
10287 | } | |
10288 | ||
0d06ead5 GK |
10289 | /* Determine whether the evaluation of EXPR references any variables |
10290 | or functions which aren't otherwise used (and therefore may not be | |
10291 | output). */ | |
10292 | static tree | |
10293 | reference_to_unused (tree * tp, int * walk_subtrees, | |
10294 | void * data ATTRIBUTE_UNUSED) | |
10295 | { | |
07beea0d | 10296 | if (! EXPR_P (*tp) && ! GIMPLE_STMT_P (*tp) && ! CONSTANT_CLASS_P (*tp)) |
0d06ead5 | 10297 | *walk_subtrees = 0; |
2878ea73 | 10298 | |
0d06ead5 GK |
10299 | if (DECL_P (*tp) && ! TREE_PUBLIC (*tp) && ! TREE_USED (*tp) |
10300 | && ! TREE_ASM_WRITTEN (*tp)) | |
10301 | return *tp; | |
4f40bddf JH |
10302 | else if (!flag_unit_at_a_time) |
10303 | return NULL_TREE; | |
10304 | else if (!cgraph_global_info_ready | |
10305 | && (TREE_CODE (*tp) == VAR_DECL || TREE_CODE (*tp) == FUNCTION_DECL)) | |
10306 | gcc_unreachable (); | |
10307 | else if (DECL_P (*tp) && TREE_CODE (*tp) == VAR_DECL) | |
9b1959ff RG |
10308 | { |
10309 | struct varpool_node *node = varpool_node (*tp); | |
10310 | if (!node->needed) | |
10311 | return *tp; | |
10312 | } | |
4f40bddf JH |
10313 | else if (DECL_P (*tp) && TREE_CODE (*tp) == FUNCTION_DECL |
10314 | && (!DECL_EXTERNAL (*tp) || DECL_DECLARED_INLINE_P (*tp))) | |
10315 | { | |
10316 | struct cgraph_node *node = cgraph_node (*tp); | |
10317 | if (!node->output) | |
2878ea73 | 10318 | return *tp; |
4f40bddf | 10319 | } |
9b1959ff RG |
10320 | |
10321 | return NULL_TREE; | |
0d06ead5 GK |
10322 | } |
10323 | ||
77270e03 JW |
10324 | /* Generate an RTL constant from a decl initializer INIT with decl type TYPE, |
10325 | for use in a later add_const_value_attribute call. */ | |
10326 | ||
10327 | static rtx | |
10328 | rtl_for_decl_init (tree init, tree type) | |
10329 | { | |
10330 | rtx rtl = NULL_RTX; | |
10331 | ||
10332 | /* If a variable is initialized with a string constant without embedded | |
10333 | zeros, build CONST_STRING. */ | |
10334 | if (TREE_CODE (init) == STRING_CST && TREE_CODE (type) == ARRAY_TYPE) | |
10335 | { | |
10336 | tree enttype = TREE_TYPE (type); | |
10337 | tree domain = TYPE_DOMAIN (type); | |
10338 | enum machine_mode mode = TYPE_MODE (enttype); | |
10339 | ||
10340 | if (GET_MODE_CLASS (mode) == MODE_INT && GET_MODE_SIZE (mode) == 1 | |
10341 | && domain | |
10342 | && integer_zerop (TYPE_MIN_VALUE (domain)) | |
10343 | && compare_tree_int (TYPE_MAX_VALUE (domain), | |
10344 | TREE_STRING_LENGTH (init) - 1) == 0 | |
10345 | && ((size_t) TREE_STRING_LENGTH (init) | |
10346 | == strlen (TREE_STRING_POINTER (init)) + 1)) | |
10347 | rtl = gen_rtx_CONST_STRING (VOIDmode, | |
10348 | ggc_strdup (TREE_STRING_POINTER (init))); | |
10349 | } | |
9a23b833 GK |
10350 | /* Other aggregates, and complex values, could be represented using |
10351 | CONCAT: FIXME! */ | |
10352 | else if (AGGREGATE_TYPE_P (type) || TREE_CODE (type) == COMPLEX_TYPE) | |
10353 | ; | |
2878ea73 | 10354 | /* Vectors only work if their mode is supported by the target. |
9a23b833 GK |
10355 | FIXME: generic vectors ought to work too. */ |
10356 | else if (TREE_CODE (type) == VECTOR_TYPE && TYPE_MODE (type) == BLKmode) | |
0d06ead5 | 10357 | ; |
77270e03 | 10358 | /* If the initializer is something that we know will expand into an |
0d06ead5 GK |
10359 | immediate RTL constant, expand it now. We must be careful not to |
10360 | reference variables which won't be output. */ | |
10361 | else if (initializer_constant_valid_p (init, type) | |
10362 | && ! walk_tree (&init, reference_to_unused, NULL, NULL)) | |
77270e03 JW |
10363 | { |
10364 | rtl = expand_expr (init, NULL_RTX, VOIDmode, EXPAND_INITIALIZER); | |
10365 | ||
10366 | /* If expand_expr returns a MEM, it wasn't immediate. */ | |
10367 | gcc_assert (!rtl || !MEM_P (rtl)); | |
10368 | } | |
10369 | ||
10370 | return rtl; | |
10371 | } | |
10372 | ||
10373 | /* Generate RTL for the variable DECL to represent its location. */ | |
10374 | ||
d8041cc8 | 10375 | static rtx |
7080f735 | 10376 | rtl_for_decl_location (tree decl) |
a3f97cbb | 10377 | { |
b3694847 | 10378 | rtx rtl; |
71dfc51f | 10379 | |
a3f97cbb JW |
10380 | /* Here we have to decide where we are going to say the parameter "lives" |
10381 | (as far as the debugger is concerned). We only have a couple of | |
10382 | choices. GCC provides us with DECL_RTL and with DECL_INCOMING_RTL. | |
71dfc51f | 10383 | |
556273e0 | 10384 | DECL_RTL normally indicates where the parameter lives during most of the |
71dfc51f | 10385 | activation of the function. If optimization is enabled however, this |
556273e0 | 10386 | could be either NULL or else a pseudo-reg. Both of those cases indicate |
a3f97cbb JW |
10387 | that the parameter doesn't really live anywhere (as far as the code |
10388 | generation parts of GCC are concerned) during most of the function's | |
10389 | activation. That will happen (for example) if the parameter is never | |
71dfc51f RK |
10390 | referenced within the function. |
10391 | ||
10392 | We could just generate a location descriptor here for all non-NULL | |
10393 | non-pseudo values of DECL_RTL and ignore all of the rest, but we can be | |
10394 | a little nicer than that if we also consider DECL_INCOMING_RTL in cases | |
10395 | where DECL_RTL is NULL or is a pseudo-reg. | |
10396 | ||
10397 | Note however that we can only get away with using DECL_INCOMING_RTL as | |
10398 | a backup substitute for DECL_RTL in certain limited cases. In cases | |
10399 | where DECL_ARG_TYPE (decl) indicates the same type as TREE_TYPE (decl), | |
10400 | we can be sure that the parameter was passed using the same type as it is | |
10401 | declared to have within the function, and that its DECL_INCOMING_RTL | |
10402 | points us to a place where a value of that type is passed. | |
10403 | ||
10404 | In cases where DECL_ARG_TYPE (decl) and TREE_TYPE (decl) are different, | |
10405 | we cannot (in general) use DECL_INCOMING_RTL as a substitute for DECL_RTL | |
10406 | because in these cases DECL_INCOMING_RTL points us to a value of some | |
10407 | type which is *different* from the type of the parameter itself. Thus, | |
10408 | if we tried to use DECL_INCOMING_RTL to generate a location attribute in | |
10409 | such cases, the debugger would end up (for example) trying to fetch a | |
10410 | `float' from a place which actually contains the first part of a | |
10411 | `double'. That would lead to really incorrect and confusing | |
10412 | output at debug-time. | |
10413 | ||
10414 | So, in general, we *do not* use DECL_INCOMING_RTL as a backup for DECL_RTL | |
10415 | in cases where DECL_ARG_TYPE (decl) != TREE_TYPE (decl). There | |
10416 | are a couple of exceptions however. On little-endian machines we can | |
10417 | get away with using DECL_INCOMING_RTL even when DECL_ARG_TYPE (decl) is | |
10418 | not the same as TREE_TYPE (decl), but only when DECL_ARG_TYPE (decl) is | |
10419 | an integral type that is smaller than TREE_TYPE (decl). These cases arise | |
10420 | when (on a little-endian machine) a non-prototyped function has a | |
10421 | parameter declared to be of type `short' or `char'. In such cases, | |
10422 | TREE_TYPE (decl) will be `short' or `char', DECL_ARG_TYPE (decl) will | |
10423 | be `int', and DECL_INCOMING_RTL will point to the lowest-order byte of the | |
10424 | passed `int' value. If the debugger then uses that address to fetch | |
10425 | a `short' or a `char' (on a little-endian machine) the result will be | |
10426 | the correct data, so we allow for such exceptional cases below. | |
10427 | ||
10428 | Note that our goal here is to describe the place where the given formal | |
2ad9852d RK |
10429 | parameter lives during most of the function's activation (i.e. between the |
10430 | end of the prologue and the start of the epilogue). We'll do that as best | |
10431 | as we can. Note however that if the given formal parameter is modified | |
10432 | sometime during the execution of the function, then a stack backtrace (at | |
10433 | debug-time) will show the function as having been called with the *new* | |
10434 | value rather than the value which was originally passed in. This happens | |
10435 | rarely enough that it is not a major problem, but it *is* a problem, and | |
10436 | I'd like to fix it. | |
10437 | ||
10438 | A future version of dwarf2out.c may generate two additional attributes for | |
10439 | any given DW_TAG_formal_parameter DIE which will describe the "passed | |
10440 | type" and the "passed location" for the given formal parameter in addition | |
10441 | to the attributes we now generate to indicate the "declared type" and the | |
10442 | "active location" for each parameter. This additional set of attributes | |
10443 | could be used by debuggers for stack backtraces. Separately, note that | |
10444 | sometimes DECL_RTL can be NULL and DECL_INCOMING_RTL can be NULL also. | |
10445 | This happens (for example) for inlined-instances of inline function formal | |
10446 | parameters which are never referenced. This really shouldn't be | |
10447 | happening. All PARM_DECL nodes should get valid non-NULL | |
6de9cd9a | 10448 | DECL_INCOMING_RTL values. FIXME. */ |
a3f97cbb JW |
10449 | |
10450 | /* Use DECL_RTL as the "location" unless we find something better. */ | |
110c3568 | 10451 | rtl = DECL_RTL_IF_SET (decl); |
a3f97cbb | 10452 | |
c28abdf0 | 10453 | /* When generating abstract instances, ignore everything except |
234c071b KB |
10454 | constants, symbols living in memory, and symbols living in |
10455 | fixed registers. */ | |
c28abdf0 RH |
10456 | if (! reload_completed) |
10457 | { | |
10458 | if (rtl | |
10459 | && (CONSTANT_P (rtl) | |
3c0cb5de | 10460 | || (MEM_P (rtl) |
234c071b | 10461 | && CONSTANT_P (XEXP (rtl, 0))) |
f8cfc6aa | 10462 | || (REG_P (rtl) |
234c071b KB |
10463 | && TREE_CODE (decl) == VAR_DECL |
10464 | && TREE_STATIC (decl)))) | |
4c8c0dec | 10465 | { |
5fd9b178 | 10466 | rtl = targetm.delegitimize_address (rtl); |
4c8c0dec JJ |
10467 | return rtl; |
10468 | } | |
c28abdf0 RH |
10469 | rtl = NULL_RTX; |
10470 | } | |
10471 | else if (TREE_CODE (decl) == PARM_DECL) | |
a3f97cbb JW |
10472 | { |
10473 | if (rtl == NULL_RTX || is_pseudo_reg (rtl)) | |
10474 | { | |
d8cb0614 RH |
10475 | tree declared_type = TREE_TYPE (decl); |
10476 | tree passed_type = DECL_ARG_TYPE (decl); | |
10477 | enum machine_mode dmode = TYPE_MODE (declared_type); | |
10478 | enum machine_mode pmode = TYPE_MODE (passed_type); | |
a3f97cbb | 10479 | |
71dfc51f | 10480 | /* This decl represents a formal parameter which was optimized out. |
a3f97cbb | 10481 | Note that DECL_INCOMING_RTL may be NULL in here, but we handle |
2ad9852d | 10482 | all cases where (rtl == NULL_RTX) just below. */ |
d8cb0614 | 10483 | if (dmode == pmode) |
556273e0 | 10484 | rtl = DECL_INCOMING_RTL (decl); |
d8cb0614 | 10485 | else if (SCALAR_INT_MODE_P (dmode) |
3401a17f JJ |
10486 | && GET_MODE_SIZE (dmode) <= GET_MODE_SIZE (pmode) |
10487 | && DECL_INCOMING_RTL (decl)) | |
d8cb0614 RH |
10488 | { |
10489 | rtx inc = DECL_INCOMING_RTL (decl); | |
10490 | if (REG_P (inc)) | |
10491 | rtl = inc; | |
10492 | else if (MEM_P (inc)) | |
10493 | { | |
10494 | if (BYTES_BIG_ENDIAN) | |
10495 | rtl = adjust_address_nv (inc, dmode, | |
10496 | GET_MODE_SIZE (pmode) | |
10497 | - GET_MODE_SIZE (dmode)); | |
10498 | else | |
10499 | rtl = inc; | |
10500 | } | |
10501 | } | |
a3f97cbb | 10502 | } |
5a904a61 JW |
10503 | |
10504 | /* If the parm was passed in registers, but lives on the stack, then | |
10505 | make a big endian correction if the mode of the type of the | |
10506 | parameter is not the same as the mode of the rtl. */ | |
10507 | /* ??? This is the same series of checks that are made in dbxout.c before | |
10508 | we reach the big endian correction code there. It isn't clear if all | |
10509 | of these checks are necessary here, but keeping them all is the safe | |
10510 | thing to do. */ | |
3c0cb5de | 10511 | else if (MEM_P (rtl) |
5a904a61 JW |
10512 | && XEXP (rtl, 0) != const0_rtx |
10513 | && ! CONSTANT_P (XEXP (rtl, 0)) | |
10514 | /* Not passed in memory. */ | |
3c0cb5de | 10515 | && !MEM_P (DECL_INCOMING_RTL (decl)) |
5a904a61 | 10516 | /* Not passed by invisible reference. */ |
f8cfc6aa | 10517 | && (!REG_P (XEXP (rtl, 0)) |
5a904a61 JW |
10518 | || REGNO (XEXP (rtl, 0)) == HARD_FRAME_POINTER_REGNUM |
10519 | || REGNO (XEXP (rtl, 0)) == STACK_POINTER_REGNUM | |
10520 | #if ARG_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM | |
10521 | || REGNO (XEXP (rtl, 0)) == ARG_POINTER_REGNUM | |
10522 | #endif | |
10523 | ) | |
10524 | /* Big endian correction check. */ | |
10525 | && BYTES_BIG_ENDIAN | |
10526 | && TYPE_MODE (TREE_TYPE (decl)) != GET_MODE (rtl) | |
10527 | && (GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (decl))) | |
10528 | < UNITS_PER_WORD)) | |
10529 | { | |
10530 | int offset = (UNITS_PER_WORD | |
10531 | - GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (decl)))); | |
2ad9852d | 10532 | |
5a904a61 JW |
10533 | rtl = gen_rtx_MEM (TYPE_MODE (TREE_TYPE (decl)), |
10534 | plus_constant (XEXP (rtl, 0), offset)); | |
10535 | } | |
a3f97cbb | 10536 | } |
8b495402 | 10537 | else if (TREE_CODE (decl) == VAR_DECL |
de3c6d93 | 10538 | && rtl |
3c0cb5de | 10539 | && MEM_P (rtl) |
8b495402 DD |
10540 | && GET_MODE (rtl) != TYPE_MODE (TREE_TYPE (decl)) |
10541 | && BYTES_BIG_ENDIAN) | |
10542 | { | |
10543 | int rsize = GET_MODE_SIZE (GET_MODE (rtl)); | |
10544 | int dsize = GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (decl))); | |
10545 | ||
10546 | /* If a variable is declared "register" yet is smaller than | |
10547 | a register, then if we store the variable to memory, it | |
10548 | looks like we're storing a register-sized value, when in | |
10549 | fact we are not. We need to adjust the offset of the | |
10550 | storage location to reflect the actual value's bytes, | |
10551 | else gdb will not be able to display it. */ | |
10552 | if (rsize > dsize) | |
10553 | rtl = gen_rtx_MEM (TYPE_MODE (TREE_TYPE (decl)), | |
10554 | plus_constant (XEXP (rtl, 0), rsize-dsize)); | |
10555 | } | |
71dfc51f | 10556 | |
2ad9852d RK |
10557 | /* A variable with no DECL_RTL but a DECL_INITIAL is a compile-time constant, |
10558 | and will have been substituted directly into all expressions that use it. | |
10559 | C does not have such a concept, but C++ and other languages do. */ | |
30e6f306 | 10560 | if (!rtl && TREE_CODE (decl) == VAR_DECL && DECL_INITIAL (decl)) |
77270e03 | 10561 | rtl = rtl_for_decl_init (DECL_INITIAL (decl), TREE_TYPE (decl)); |
8063ddcf | 10562 | |
4c8c0dec | 10563 | if (rtl) |
5fd9b178 | 10564 | rtl = targetm.delegitimize_address (rtl); |
b9203463 RH |
10565 | |
10566 | /* If we don't look past the constant pool, we risk emitting a | |
10567 | reference to a constant pool entry that isn't referenced from | |
10568 | code, and thus is not emitted. */ | |
10569 | if (rtl) | |
10570 | rtl = avoid_constant_pool_reference (rtl); | |
10571 | ||
d8041cc8 RH |
10572 | return rtl; |
10573 | } | |
10574 | ||
30e6f306 RH |
10575 | /* We need to figure out what section we should use as the base for the |
10576 | address ranges where a given location is valid. | |
10577 | 1. If this particular DECL has a section associated with it, use that. | |
10578 | 2. If this function has a section associated with it, use that. | |
10579 | 3. Otherwise, use the text section. | |
10580 | XXX: If you split a variable across multiple sections, we won't notice. */ | |
10581 | ||
10582 | static const char * | |
10583 | secname_for_decl (tree decl) | |
10584 | { | |
10585 | const char *secname; | |
10586 | ||
10587 | if (VAR_OR_FUNCTION_DECL_P (decl) && DECL_SECTION_NAME (decl)) | |
10588 | { | |
10589 | tree sectree = DECL_SECTION_NAME (decl); | |
10590 | secname = TREE_STRING_POINTER (sectree); | |
10591 | } | |
10592 | else if (current_function_decl && DECL_SECTION_NAME (current_function_decl)) | |
10593 | { | |
10594 | tree sectree = DECL_SECTION_NAME (current_function_decl); | |
10595 | secname = TREE_STRING_POINTER (sectree); | |
10596 | } | |
c543ca49 | 10597 | else if (cfun && in_cold_section_p) |
30e6f306 RH |
10598 | secname = cfun->cold_section_label; |
10599 | else | |
10600 | secname = text_section_label; | |
10601 | ||
10602 | return secname; | |
10603 | } | |
10604 | ||
b20b352b | 10605 | /* Generate *either* a DW_AT_location attribute or else a DW_AT_const_value |
d8041cc8 RH |
10606 | data attribute for a variable or a parameter. We generate the |
10607 | DW_AT_const_value attribute only in those cases where the given variable | |
10608 | or parameter does not have a true "location" either in memory or in a | |
10609 | register. This can happen (for example) when a constant is passed as an | |
10610 | actual argument in a call to an inline function. (It's possible that | |
10611 | these things can crop up in other ways also.) Note that one type of | |
10612 | constant value which can be passed into an inlined function is a constant | |
10613 | pointer. This can happen for example if an actual argument in an inlined | |
10614 | function call evaluates to a compile-time constant address. */ | |
10615 | ||
10616 | static void | |
0a2d3d69 DB |
10617 | add_location_or_const_value_attribute (dw_die_ref die, tree decl, |
10618 | enum dwarf_attribute attr) | |
d8041cc8 | 10619 | { |
b3694847 | 10620 | rtx rtl; |
b9203463 | 10621 | dw_loc_descr_ref descr; |
0a2d3d69 | 10622 | var_loc_list *loc_list; |
3c46c513 | 10623 | struct var_loc_node *node; |
d8041cc8 RH |
10624 | if (TREE_CODE (decl) == ERROR_MARK) |
10625 | return; | |
ced3f397 NS |
10626 | |
10627 | gcc_assert (TREE_CODE (decl) == VAR_DECL || TREE_CODE (decl) == PARM_DECL | |
10628 | || TREE_CODE (decl) == RESULT_DECL); | |
2878ea73 | 10629 | |
0a2d3d69 DB |
10630 | /* See if we possibly have multiple locations for this variable. */ |
10631 | loc_list = lookup_decl_loc (decl); | |
10632 | ||
10633 | /* If it truly has multiple locations, the first and last node will | |
10634 | differ. */ | |
10635 | if (loc_list && loc_list->first != loc_list->last) | |
10636 | { | |
30e6f306 | 10637 | const char *endname, *secname; |
0a2d3d69 DB |
10638 | dw_loc_list_ref list; |
10639 | rtx varloc; | |
62760ffd | 10640 | enum var_init_status initialized; |
3c46c513 | 10641 | |
0a2d3d69 | 10642 | /* Now that we know what section we are using for a base, |
2878ea73 | 10643 | actually construct the list of locations. |
0a2d3d69 DB |
10644 | The first location information is what is passed to the |
10645 | function that creates the location list, and the remaining | |
10646 | locations just get added on to that list. | |
10647 | Note that we only know the start address for a location | |
10648 | (IE location changes), so to build the range, we use | |
10649 | the range [current location start, next location start]. | |
10650 | This means we have to special case the last node, and generate | |
10651 | a range of [last location start, end of function label]. */ | |
10652 | ||
10653 | node = loc_list->first; | |
10654 | varloc = NOTE_VAR_LOCATION (node->var_loc_note); | |
30e6f306 RH |
10655 | secname = secname_for_decl (decl); |
10656 | ||
62760ffd CT |
10657 | if (NOTE_VAR_LOCATION_LOC (node->var_loc_note)) |
10658 | initialized = NOTE_VAR_LOCATION_STATUS (node->var_loc_note); | |
10659 | else | |
10660 | initialized = VAR_INIT_STATUS_INITIALIZED; | |
10661 | ||
10662 | list = new_loc_list (loc_descriptor (varloc, initialized), | |
0a2d3d69 DB |
10663 | node->label, node->next->label, secname, 1); |
10664 | node = node->next; | |
10665 | ||
10666 | for (; node->next; node = node->next) | |
10667 | if (NOTE_VAR_LOCATION_LOC (node->var_loc_note) != NULL_RTX) | |
10668 | { | |
10669 | /* The variable has a location between NODE->LABEL and | |
10670 | NODE->NEXT->LABEL. */ | |
62760ffd CT |
10671 | enum var_init_status initialized = |
10672 | NOTE_VAR_LOCATION_STATUS (node->var_loc_note); | |
0a2d3d69 | 10673 | varloc = NOTE_VAR_LOCATION (node->var_loc_note); |
62760ffd CT |
10674 | add_loc_descr_to_loc_list (&list, |
10675 | loc_descriptor (varloc, initialized), | |
0a2d3d69 DB |
10676 | node->label, node->next->label, secname); |
10677 | } | |
10678 | ||
10679 | /* If the variable has a location at the last label | |
10680 | it keeps its location until the end of function. */ | |
10681 | if (NOTE_VAR_LOCATION_LOC (node->var_loc_note) != NULL_RTX) | |
10682 | { | |
10683 | char label_id[MAX_ARTIFICIAL_LABEL_BYTES]; | |
62760ffd CT |
10684 | enum var_init_status initialized = |
10685 | NOTE_VAR_LOCATION_STATUS (node->var_loc_note); | |
0a2d3d69 DB |
10686 | |
10687 | varloc = NOTE_VAR_LOCATION (node->var_loc_note); | |
10688 | if (!current_function_decl) | |
10689 | endname = text_end_label; | |
10690 | else | |
10691 | { | |
10692 | ASM_GENERATE_INTERNAL_LABEL (label_id, FUNC_END_LABEL, | |
10693 | current_function_funcdef_no); | |
10694 | endname = ggc_strdup (label_id); | |
10695 | } | |
62760ffd CT |
10696 | add_loc_descr_to_loc_list (&list, |
10697 | loc_descriptor (varloc, initialized), | |
0a2d3d69 DB |
10698 | node->label, endname, secname); |
10699 | } | |
10700 | ||
10701 | /* Finally, add the location list to the DIE, and we are done. */ | |
10702 | add_AT_loc_list (die, attr, list); | |
10703 | return; | |
10704 | } | |
10705 | ||
3c46c513 DB |
10706 | /* Try to get some constant RTL for this decl, and use that as the value of |
10707 | the location. */ | |
2878ea73 | 10708 | |
d8041cc8 | 10709 | rtl = rtl_for_decl_location (decl); |
1a186ec5 | 10710 | if (rtl && (CONSTANT_P (rtl) || GET_CODE (rtl) == CONST_STRING)) |
a3f97cbb | 10711 | { |
a3f97cbb | 10712 | add_const_value_attribute (die, rtl); |
1a186ec5 | 10713 | return; |
a3f97cbb | 10714 | } |
2878ea73 | 10715 | |
86bd8ebf | 10716 | /* If we have tried to generate the location otherwise, and it |
3c46c513 DB |
10717 | didn't work out (we wouldn't be here if we did), and we have a one entry |
10718 | location list, try generating a location from that. */ | |
10719 | if (loc_list && loc_list->first) | |
10720 | { | |
62760ffd | 10721 | enum var_init_status status; |
3c46c513 | 10722 | node = loc_list->first; |
62760ffd CT |
10723 | status = NOTE_VAR_LOCATION_STATUS (node->var_loc_note); |
10724 | descr = loc_descriptor (NOTE_VAR_LOCATION (node->var_loc_note), status); | |
3c46c513 | 10725 | if (descr) |
86bd8ebf JJ |
10726 | { |
10727 | add_AT_location_description (die, attr, descr); | |
10728 | return; | |
10729 | } | |
10730 | } | |
10731 | ||
10732 | /* We couldn't get any rtl, so try directly generating the location | |
10733 | description from the tree. */ | |
10734 | descr = loc_descriptor_from_tree (decl); | |
10735 | if (descr) | |
10736 | { | |
10737 | add_AT_location_description (die, attr, descr); | |
10738 | return; | |
3c46c513 | 10739 | } |
0d06ead5 GK |
10740 | /* None of that worked, so it must not really have a location; |
10741 | try adding a constant value attribute from the DECL_INITIAL. */ | |
10742 | tree_add_const_value_attribute (die, decl); | |
a3f97cbb JW |
10743 | } |
10744 | ||
1bfb5f8f JM |
10745 | /* If we don't have a copy of this variable in memory for some reason (such |
10746 | as a C++ member constant that doesn't have an out-of-line definition), | |
10747 | we should tell the debugger about the constant value. */ | |
10748 | ||
10749 | static void | |
7080f735 | 10750 | tree_add_const_value_attribute (dw_die_ref var_die, tree decl) |
1bfb5f8f JM |
10751 | { |
10752 | tree init = DECL_INITIAL (decl); | |
10753 | tree type = TREE_TYPE (decl); | |
77270e03 | 10754 | rtx rtl; |
1bfb5f8f | 10755 | |
77270e03 | 10756 | if (TREE_READONLY (decl) && ! TREE_THIS_VOLATILE (decl) && init) |
1bfb5f8f JM |
10757 | /* OK */; |
10758 | else | |
10759 | return; | |
10760 | ||
77270e03 JW |
10761 | rtl = rtl_for_decl_init (init, type); |
10762 | if (rtl) | |
10763 | add_const_value_attribute (var_die, rtl); | |
1bfb5f8f | 10764 | } |
0b34cf1e | 10765 | |
35d177a2 AO |
10766 | /* Convert the CFI instructions for the current function into a |
10767 | location list. This is used for DW_AT_frame_base when we targeting | |
10768 | a dwarf2 consumer that does not support the dwarf3 | |
10769 | DW_OP_call_frame_cfa. OFFSET is a constant to be added to all CFA | |
10770 | expressions. */ | |
30e6f306 RH |
10771 | |
10772 | static dw_loc_list_ref | |
35d177a2 | 10773 | convert_cfa_to_fb_loc_list (HOST_WIDE_INT offset) |
30e6f306 RH |
10774 | { |
10775 | dw_fde_ref fde; | |
10776 | dw_loc_list_ref list, *list_tail; | |
10777 | dw_cfi_ref cfi; | |
10778 | dw_cfa_location last_cfa, next_cfa; | |
10779 | const char *start_label, *last_label, *section; | |
10780 | ||
10781 | fde = &fde_table[fde_table_in_use - 1]; | |
10782 | ||
10783 | section = secname_for_decl (current_function_decl); | |
10784 | list_tail = &list; | |
10785 | list = NULL; | |
10786 | ||
10787 | next_cfa.reg = INVALID_REGNUM; | |
10788 | next_cfa.offset = 0; | |
10789 | next_cfa.indirect = 0; | |
10790 | next_cfa.base_offset = 0; | |
10791 | ||
10792 | start_label = fde->dw_fde_begin; | |
10793 | ||
10794 | /* ??? Bald assumption that the CIE opcode list does not contain | |
10795 | advance opcodes. */ | |
10796 | for (cfi = cie_cfi_head; cfi; cfi = cfi->dw_cfi_next) | |
10797 | lookup_cfa_1 (cfi, &next_cfa); | |
10798 | ||
10799 | last_cfa = next_cfa; | |
10800 | last_label = start_label; | |
10801 | ||
10802 | for (cfi = fde->dw_fde_cfi; cfi; cfi = cfi->dw_cfi_next) | |
10803 | switch (cfi->dw_cfi_opc) | |
10804 | { | |
66cc7362 | 10805 | case DW_CFA_set_loc: |
30e6f306 RH |
10806 | case DW_CFA_advance_loc1: |
10807 | case DW_CFA_advance_loc2: | |
10808 | case DW_CFA_advance_loc4: | |
10809 | if (!cfa_equal_p (&last_cfa, &next_cfa)) | |
10810 | { | |
35d177a2 AO |
10811 | *list_tail = new_loc_list (build_cfa_loc (&last_cfa, offset), |
10812 | start_label, last_label, section, | |
10813 | list == NULL); | |
30e6f306 RH |
10814 | |
10815 | list_tail = &(*list_tail)->dw_loc_next; | |
10816 | last_cfa = next_cfa; | |
10817 | start_label = last_label; | |
10818 | } | |
10819 | last_label = cfi->dw_cfi_oprnd1.dw_cfi_addr; | |
10820 | break; | |
10821 | ||
10822 | case DW_CFA_advance_loc: | |
10823 | /* The encoding is complex enough that we should never emit this. */ | |
10824 | case DW_CFA_remember_state: | |
10825 | case DW_CFA_restore_state: | |
10826 | /* We don't handle these two in this function. It would be possible | |
10827 | if it were to be required. */ | |
10828 | gcc_unreachable (); | |
10829 | ||
10830 | default: | |
10831 | lookup_cfa_1 (cfi, &next_cfa); | |
10832 | break; | |
10833 | } | |
10834 | ||
10835 | if (!cfa_equal_p (&last_cfa, &next_cfa)) | |
10836 | { | |
35d177a2 AO |
10837 | *list_tail = new_loc_list (build_cfa_loc (&last_cfa, offset), |
10838 | start_label, last_label, section, | |
10839 | list == NULL); | |
30e6f306 RH |
10840 | list_tail = &(*list_tail)->dw_loc_next; |
10841 | start_label = last_label; | |
10842 | } | |
35d177a2 AO |
10843 | *list_tail = new_loc_list (build_cfa_loc (&next_cfa, offset), |
10844 | start_label, fde->dw_fde_end, section, | |
10845 | list == NULL); | |
30e6f306 RH |
10846 | |
10847 | return list; | |
10848 | } | |
10849 | ||
35d177a2 AO |
10850 | /* Compute a displacement from the "steady-state frame pointer" to the |
10851 | frame base (often the same as the CFA), and store it in | |
10852 | frame_pointer_fb_offset. OFFSET is added to the displacement | |
10853 | before the latter is negated. */ | |
30e6f306 RH |
10854 | |
10855 | static void | |
35d177a2 | 10856 | compute_frame_pointer_to_fb_displacement (HOST_WIDE_INT offset) |
30e6f306 | 10857 | { |
f6672e8e RH |
10858 | rtx reg, elim; |
10859 | ||
10860 | #ifdef FRAME_POINTER_CFA_OFFSET | |
10861 | reg = frame_pointer_rtx; | |
35d177a2 | 10862 | offset += FRAME_POINTER_CFA_OFFSET (current_function_decl); |
f6672e8e RH |
10863 | #else |
10864 | reg = arg_pointer_rtx; | |
35d177a2 | 10865 | offset += ARG_POINTER_CFA_OFFSET (current_function_decl); |
f6672e8e | 10866 | #endif |
30e6f306 | 10867 | |
f6672e8e RH |
10868 | elim = eliminate_regs (reg, VOIDmode, NULL_RTX); |
10869 | if (GET_CODE (elim) == PLUS) | |
10870 | { | |
10871 | offset += INTVAL (XEXP (elim, 1)); | |
10872 | elim = XEXP (elim, 0); | |
10873 | } | |
10874 | gcc_assert (elim == (frame_pointer_needed ? hard_frame_pointer_rtx | |
10875 | : stack_pointer_rtx)); | |
30e6f306 | 10876 | |
35d177a2 | 10877 | frame_pointer_fb_offset = -offset; |
30e6f306 RH |
10878 | } |
10879 | ||
b20b352b | 10880 | /* Generate a DW_AT_name attribute given some string value to be included as |
a3f97cbb | 10881 | the value of the attribute. */ |
71dfc51f | 10882 | |
c4274b22 | 10883 | static void |
7080f735 | 10884 | add_name_attribute (dw_die_ref die, const char *name_string) |
a3f97cbb | 10885 | { |
71dfc51f | 10886 | if (name_string != NULL && *name_string != 0) |
14a774a9 RK |
10887 | { |
10888 | if (demangle_name_func) | |
10889 | name_string = (*demangle_name_func) (name_string); | |
10890 | ||
10891 | add_AT_string (die, DW_AT_name, name_string); | |
10892 | } | |
a3f97cbb JW |
10893 | } |
10894 | ||
b20b352b | 10895 | /* Generate a DW_AT_comp_dir attribute for DIE. */ |
c4274b22 RH |
10896 | |
10897 | static void | |
7080f735 | 10898 | add_comp_dir_attribute (dw_die_ref die) |
c4274b22 | 10899 | { |
b20d9f0c | 10900 | const char *wd = get_src_pwd (); |
c4274b22 RH |
10901 | if (wd != NULL) |
10902 | add_AT_string (die, DW_AT_comp_dir, wd); | |
10903 | } | |
10904 | ||
a3f97cbb | 10905 | /* Given a tree node describing an array bound (either lower or upper) output |
466446b0 | 10906 | a representation for that bound. */ |
71dfc51f | 10907 | |
a3f97cbb | 10908 | static void |
7080f735 | 10909 | add_bound_info (dw_die_ref subrange_die, enum dwarf_attribute bound_attr, tree bound) |
a3f97cbb | 10910 | { |
a3f97cbb JW |
10911 | switch (TREE_CODE (bound)) |
10912 | { | |
10913 | case ERROR_MARK: | |
10914 | return; | |
10915 | ||
3ef42a0c | 10916 | /* All fixed-bounds are represented by INTEGER_CST nodes. */ |
a3f97cbb | 10917 | case INTEGER_CST: |
665f2503 RK |
10918 | if (! host_integerp (bound, 0) |
10919 | || (bound_attr == DW_AT_lower_bound | |
28985b81 | 10920 | && (((is_c_family () || is_java ()) && integer_zerop (bound)) |
665f2503 | 10921 | || (is_fortran () && integer_onep (bound))))) |
a1105617 | 10922 | /* Use the default. */ |
665f2503 | 10923 | ; |
141719a8 | 10924 | else |
665f2503 | 10925 | add_AT_unsigned (subrange_die, bound_attr, tree_low_cst (bound, 0)); |
a3f97cbb JW |
10926 | break; |
10927 | ||
b1ccbc24 | 10928 | case CONVERT_EXPR: |
a3f97cbb | 10929 | case NOP_EXPR: |
b1ccbc24 | 10930 | case NON_LVALUE_EXPR: |
ed239f5a | 10931 | case VIEW_CONVERT_EXPR: |
b1ccbc24 RK |
10932 | add_bound_info (subrange_die, bound_attr, TREE_OPERAND (bound, 0)); |
10933 | break; | |
556273e0 | 10934 | |
a3f97cbb | 10935 | case SAVE_EXPR: |
a3f97cbb | 10936 | break; |
3f76745e | 10937 | |
ef76d03b | 10938 | case VAR_DECL: |
d8041cc8 | 10939 | case PARM_DECL: |
6de9cd9a | 10940 | case RESULT_DECL: |
d8041cc8 RH |
10941 | { |
10942 | dw_die_ref decl_die = lookup_decl_die (bound); | |
10943 | ||
10944 | /* ??? Can this happen, or should the variable have been bound | |
10945 | first? Probably it can, since I imagine that we try to create | |
10946 | the types of parameters in the order in which they exist in | |
0b34cf1e | 10947 | the list, and won't have created a forward reference to a |
d8041cc8 RH |
10948 | later parameter. */ |
10949 | if (decl_die != NULL) | |
10950 | add_AT_die_ref (subrange_die, bound_attr, decl_die); | |
10951 | break; | |
10952 | } | |
ef76d03b | 10953 | |
3f76745e | 10954 | default: |
d8041cc8 RH |
10955 | { |
10956 | /* Otherwise try to create a stack operation procedure to | |
10957 | evaluate the value of the array bound. */ | |
10958 | ||
10959 | dw_die_ref ctx, decl_die; | |
10960 | dw_loc_descr_ref loc; | |
10961 | ||
1a186ec5 | 10962 | loc = loc_descriptor_from_tree (bound); |
d8041cc8 RH |
10963 | if (loc == NULL) |
10964 | break; | |
10965 | ||
e7af1d45 RK |
10966 | if (current_function_decl == 0) |
10967 | ctx = comp_unit_die; | |
10968 | else | |
10969 | ctx = lookup_decl_die (current_function_decl); | |
d8041cc8 | 10970 | |
54ba1f0d | 10971 | decl_die = new_die (DW_TAG_variable, ctx, bound); |
d8041cc8 RH |
10972 | add_AT_flag (decl_die, DW_AT_artificial, 1); |
10973 | add_type_attribute (decl_die, TREE_TYPE (bound), 1, 0, ctx); | |
10974 | add_AT_loc (decl_die, DW_AT_location, loc); | |
10975 | ||
10976 | add_AT_die_ref (subrange_die, bound_attr, decl_die); | |
10977 | break; | |
10978 | } | |
a3f97cbb JW |
10979 | } |
10980 | } | |
10981 | ||
10982 | /* Note that the block of subscript information for an array type also | |
10983 | includes information about the element type of type given array type. */ | |
71dfc51f | 10984 | |
a3f97cbb | 10985 | static void |
7080f735 | 10986 | add_subscript_info (dw_die_ref type_die, tree type) |
a3f97cbb | 10987 | { |
081f5e7e | 10988 | #ifndef MIPS_DEBUGGING_INFO |
b3694847 | 10989 | unsigned dimension_number; |
081f5e7e | 10990 | #endif |
b3694847 SS |
10991 | tree lower, upper; |
10992 | dw_die_ref subrange_die; | |
a3f97cbb | 10993 | |
556273e0 | 10994 | /* The GNU compilers represent multidimensional array types as sequences of |
a3f97cbb JW |
10995 | one dimensional array types whose element types are themselves array |
10996 | types. Here we squish that down, so that each multidimensional array | |
556273e0 | 10997 | type gets only one array_type DIE in the Dwarf debugging info. The draft |
a3f97cbb JW |
10998 | Dwarf specification say that we are allowed to do this kind of |
10999 | compression in C (because there is no difference between an array or | |
556273e0 | 11000 | arrays and a multidimensional array in C) but for other source languages |
a3f97cbb | 11001 | (e.g. Ada) we probably shouldn't do this. */ |
71dfc51f | 11002 | |
a3f97cbb JW |
11003 | /* ??? The SGI dwarf reader fails for multidimensional arrays with a |
11004 | const enum type. E.g. const enum machine_mode insn_operand_mode[2][10]. | |
11005 | We work around this by disabling this feature. See also | |
11006 | gen_array_type_die. */ | |
11007 | #ifndef MIPS_DEBUGGING_INFO | |
11008 | for (dimension_number = 0; | |
11009 | TREE_CODE (type) == ARRAY_TYPE; | |
11010 | type = TREE_TYPE (type), dimension_number++) | |
a3f97cbb | 11011 | #endif |
2ad9852d | 11012 | { |
b3694847 | 11013 | tree domain = TYPE_DOMAIN (type); |
a3f97cbb JW |
11014 | |
11015 | /* Arrays come in three flavors: Unspecified bounds, fixed bounds, | |
556273e0 | 11016 | and (in GNU C only) variable bounds. Handle all three forms |
73c68f61 | 11017 | here. */ |
54ba1f0d | 11018 | subrange_die = new_die (DW_TAG_subrange_type, type_die, NULL); |
a3f97cbb JW |
11019 | if (domain) |
11020 | { | |
11021 | /* We have an array type with specified bounds. */ | |
11022 | lower = TYPE_MIN_VALUE (domain); | |
11023 | upper = TYPE_MAX_VALUE (domain); | |
11024 | ||
beb235f8 | 11025 | /* Define the index type. */ |
a9d38797 | 11026 | if (TREE_TYPE (domain)) |
ef76d03b JW |
11027 | { |
11028 | /* ??? This is probably an Ada unnamed subrange type. Ignore the | |
11029 | TREE_TYPE field. We can't emit debug info for this | |
11030 | because it is an unnamed integral type. */ | |
11031 | if (TREE_CODE (domain) == INTEGER_TYPE | |
11032 | && TYPE_NAME (domain) == NULL_TREE | |
11033 | && TREE_CODE (TREE_TYPE (domain)) == INTEGER_TYPE | |
11034 | && TYPE_NAME (TREE_TYPE (domain)) == NULL_TREE) | |
556273e0 | 11035 | ; |
ef76d03b JW |
11036 | else |
11037 | add_type_attribute (subrange_die, TREE_TYPE (domain), 0, 0, | |
11038 | type_die); | |
11039 | } | |
a9d38797 | 11040 | |
e1ee5cdc RH |
11041 | /* ??? If upper is NULL, the array has unspecified length, |
11042 | but it does have a lower bound. This happens with Fortran | |
11043 | dimension arr(N:*) | |
7080f735 | 11044 | Since the debugger is definitely going to need to know N |
e1ee5cdc RH |
11045 | to produce useful results, go ahead and output the lower |
11046 | bound solo, and hope the debugger can cope. */ | |
11047 | ||
141719a8 | 11048 | add_bound_info (subrange_die, DW_AT_lower_bound, lower); |
e1ee5cdc RH |
11049 | if (upper) |
11050 | add_bound_info (subrange_die, DW_AT_upper_bound, upper); | |
a3f97cbb | 11051 | } |
71dfc51f | 11052 | |
2ad9852d RK |
11053 | /* Otherwise we have an array type with an unspecified length. The |
11054 | DWARF-2 spec does not say how to handle this; let's just leave out the | |
11055 | bounds. */ | |
a3f97cbb | 11056 | } |
a3f97cbb JW |
11057 | } |
11058 | ||
11059 | static void | |
7080f735 | 11060 | add_byte_size_attribute (dw_die_ref die, tree tree_node) |
a3f97cbb | 11061 | { |
b3694847 | 11062 | unsigned size; |
a3f97cbb JW |
11063 | |
11064 | switch (TREE_CODE (tree_node)) | |
11065 | { | |
11066 | case ERROR_MARK: | |
11067 | size = 0; | |
11068 | break; | |
11069 | case ENUMERAL_TYPE: | |
11070 | case RECORD_TYPE: | |
11071 | case UNION_TYPE: | |
11072 | case QUAL_UNION_TYPE: | |
11073 | size = int_size_in_bytes (tree_node); | |
11074 | break; | |
11075 | case FIELD_DECL: | |
11076 | /* For a data member of a struct or union, the DW_AT_byte_size is | |
73c68f61 SS |
11077 | generally given as the number of bytes normally allocated for an |
11078 | object of the *declared* type of the member itself. This is true | |
11079 | even for bit-fields. */ | |
a3f97cbb JW |
11080 | size = simple_type_size_in_bits (field_type (tree_node)) / BITS_PER_UNIT; |
11081 | break; | |
11082 | default: | |
ced3f397 | 11083 | gcc_unreachable (); |
a3f97cbb JW |
11084 | } |
11085 | ||
11086 | /* Note that `size' might be -1 when we get to this point. If it is, that | |
11087 | indicates that the byte size of the entity in question is variable. We | |
11088 | have no good way of expressing this fact in Dwarf at the present time, | |
11089 | so just let the -1 pass on through. */ | |
a3f97cbb JW |
11090 | add_AT_unsigned (die, DW_AT_byte_size, size); |
11091 | } | |
11092 | ||
11093 | /* For a FIELD_DECL node which represents a bit-field, output an attribute | |
11094 | which specifies the distance in bits from the highest order bit of the | |
11095 | "containing object" for the bit-field to the highest order bit of the | |
11096 | bit-field itself. | |
11097 | ||
2ad9852d RK |
11098 | For any given bit-field, the "containing object" is a hypothetical object |
11099 | (of some integral or enum type) within which the given bit-field lives. The | |
11100 | type of this hypothetical "containing object" is always the same as the | |
11101 | declared type of the individual bit-field itself. The determination of the | |
11102 | exact location of the "containing object" for a bit-field is rather | |
11103 | complicated. It's handled by the `field_byte_offset' function (above). | |
a3f97cbb JW |
11104 | |
11105 | Note that it is the size (in bytes) of the hypothetical "containing object" | |
11106 | which will be given in the DW_AT_byte_size attribute for this bit-field. | |
11107 | (See `byte_size_attribute' above). */ | |
71dfc51f RK |
11108 | |
11109 | static inline void | |
7080f735 | 11110 | add_bit_offset_attribute (dw_die_ref die, tree decl) |
a3f97cbb | 11111 | { |
665f2503 RK |
11112 | HOST_WIDE_INT object_offset_in_bytes = field_byte_offset (decl); |
11113 | tree type = DECL_BIT_FIELD_TYPE (decl); | |
11114 | HOST_WIDE_INT bitpos_int; | |
11115 | HOST_WIDE_INT highest_order_object_bit_offset; | |
11116 | HOST_WIDE_INT highest_order_field_bit_offset; | |
11117 | HOST_WIDE_INT unsigned bit_offset; | |
a3f97cbb | 11118 | |
3a88cbd1 | 11119 | /* Must be a field and a bit field. */ |
ced3f397 | 11120 | gcc_assert (type && TREE_CODE (decl) == FIELD_DECL); |
a3f97cbb JW |
11121 | |
11122 | /* We can't yet handle bit-fields whose offsets are variable, so if we | |
11123 | encounter such things, just return without generating any attribute | |
665f2503 RK |
11124 | whatsoever. Likewise for variable or too large size. */ |
11125 | if (! host_integerp (bit_position (decl), 0) | |
11126 | || ! host_integerp (DECL_SIZE (decl), 1)) | |
71dfc51f RK |
11127 | return; |
11128 | ||
665f2503 | 11129 | bitpos_int = int_bit_position (decl); |
a3f97cbb JW |
11130 | |
11131 | /* Note that the bit offset is always the distance (in bits) from the | |
556273e0 KH |
11132 | highest-order bit of the "containing object" to the highest-order bit of |
11133 | the bit-field itself. Since the "high-order end" of any object or field | |
a3f97cbb JW |
11134 | is different on big-endian and little-endian machines, the computation |
11135 | below must take account of these differences. */ | |
11136 | highest_order_object_bit_offset = object_offset_in_bytes * BITS_PER_UNIT; | |
11137 | highest_order_field_bit_offset = bitpos_int; | |
11138 | ||
71dfc51f | 11139 | if (! BYTES_BIG_ENDIAN) |
a3f97cbb | 11140 | { |
665f2503 | 11141 | highest_order_field_bit_offset += tree_low_cst (DECL_SIZE (decl), 0); |
a3f97cbb JW |
11142 | highest_order_object_bit_offset += simple_type_size_in_bits (type); |
11143 | } | |
71dfc51f RK |
11144 | |
11145 | bit_offset | |
11146 | = (! BYTES_BIG_ENDIAN | |
11147 | ? highest_order_object_bit_offset - highest_order_field_bit_offset | |
11148 | : highest_order_field_bit_offset - highest_order_object_bit_offset); | |
a3f97cbb JW |
11149 | |
11150 | add_AT_unsigned (die, DW_AT_bit_offset, bit_offset); | |
11151 | } | |
11152 | ||
11153 | /* For a FIELD_DECL node which represents a bit field, output an attribute | |
11154 | which specifies the length in bits of the given field. */ | |
71dfc51f RK |
11155 | |
11156 | static inline void | |
7080f735 | 11157 | add_bit_size_attribute (dw_die_ref die, tree decl) |
a3f97cbb | 11158 | { |
3a88cbd1 | 11159 | /* Must be a field and a bit field. */ |
ced3f397 NS |
11160 | gcc_assert (TREE_CODE (decl) == FIELD_DECL |
11161 | && DECL_BIT_FIELD_TYPE (decl)); | |
665f2503 RK |
11162 | |
11163 | if (host_integerp (DECL_SIZE (decl), 1)) | |
11164 | add_AT_unsigned (die, DW_AT_bit_size, tree_low_cst (DECL_SIZE (decl), 1)); | |
a3f97cbb JW |
11165 | } |
11166 | ||
88dad228 | 11167 | /* If the compiled language is ANSI C, then add a 'prototyped' |
a3f97cbb | 11168 | attribute, if arg types are given for the parameters of a function. */ |
71dfc51f RK |
11169 | |
11170 | static inline void | |
7080f735 | 11171 | add_prototyped_attribute (dw_die_ref die, tree func_type) |
a3f97cbb | 11172 | { |
88dad228 JM |
11173 | if (get_AT_unsigned (comp_unit_die, DW_AT_language) == DW_LANG_C89 |
11174 | && TYPE_ARG_TYPES (func_type) != NULL) | |
11175 | add_AT_flag (die, DW_AT_prototyped, 1); | |
a3f97cbb JW |
11176 | } |
11177 | ||
a3f97cbb JW |
11178 | /* Add an 'abstract_origin' attribute below a given DIE. The DIE is found |
11179 | by looking in either the type declaration or object declaration | |
11180 | equate table. */ | |
71dfc51f RK |
11181 | |
11182 | static inline void | |
7080f735 | 11183 | add_abstract_origin_attribute (dw_die_ref die, tree origin) |
a3f97cbb JW |
11184 | { |
11185 | dw_die_ref origin_die = NULL; | |
bbc6ae08 | 11186 | |
d10b8e05 | 11187 | if (TREE_CODE (origin) != FUNCTION_DECL) |
e40a1c67 JM |
11188 | { |
11189 | /* We may have gotten separated from the block for the inlined | |
11190 | function, if we're in an exception handler or some such; make | |
11191 | sure that the abstract function has been written out. | |
11192 | ||
73c68f61 | 11193 | Doing this for nested functions is wrong, however; functions are |
e40a1c67 | 11194 | distinct units, and our context might not even be inline. */ |
fb13d4d0 | 11195 | tree fn = origin; |
2ad9852d | 11196 | |
fb13d4d0 JM |
11197 | if (TYPE_P (fn)) |
11198 | fn = TYPE_STUB_DECL (fn); | |
2878ea73 | 11199 | |
596b98ce | 11200 | fn = decl_function_context (fn); |
e40a1c67 | 11201 | if (fn) |
1edf43d6 | 11202 | dwarf2out_abstract_function (fn); |
e40a1c67 | 11203 | } |
44db1d9c | 11204 | |
2f939d94 | 11205 | if (DECL_P (origin)) |
71dfc51f | 11206 | origin_die = lookup_decl_die (origin); |
2f939d94 | 11207 | else if (TYPE_P (origin)) |
71dfc51f RK |
11208 | origin_die = lookup_type_die (origin); |
11209 | ||
9acf766f DB |
11210 | /* XXX: Functions that are never lowered don't always have correct block |
11211 | trees (in the case of java, they simply have no block tree, in some other | |
11212 | languages). For these functions, there is nothing we can really do to | |
11213 | output correct debug info for inlined functions in all cases. Rather | |
535a42b1 | 11214 | than die, we'll just produce deficient debug info now, in that we will |
9acf766f DB |
11215 | have variables without a proper abstract origin. In the future, when all |
11216 | functions are lowered, we should re-add a gcc_assert (origin_die) | |
11217 | here. */ | |
556273e0 | 11218 | |
9acf766f DB |
11219 | if (origin_die) |
11220 | add_AT_die_ref (die, DW_AT_abstract_origin, origin_die); | |
a3f97cbb JW |
11221 | } |
11222 | ||
bdb669cb JM |
11223 | /* We do not currently support the pure_virtual attribute. */ |
11224 | ||
71dfc51f | 11225 | static inline void |
7080f735 | 11226 | add_pure_or_virtual_attribute (dw_die_ref die, tree func_decl) |
a3f97cbb | 11227 | { |
a94dbf2c | 11228 | if (DECL_VINDEX (func_decl)) |
a3f97cbb | 11229 | { |
bdb669cb | 11230 | add_AT_unsigned (die, DW_AT_virtuality, DW_VIRTUALITY_virtual); |
665f2503 RK |
11231 | |
11232 | if (host_integerp (DECL_VINDEX (func_decl), 0)) | |
11233 | add_AT_loc (die, DW_AT_vtable_elem_location, | |
11234 | new_loc_descr (DW_OP_constu, | |
11235 | tree_low_cst (DECL_VINDEX (func_decl), 0), | |
11236 | 0)); | |
71dfc51f | 11237 | |
a94dbf2c JM |
11238 | /* GNU extension: Record what type this method came from originally. */ |
11239 | if (debug_info_level > DINFO_LEVEL_TERSE) | |
11240 | add_AT_die_ref (die, DW_AT_containing_type, | |
11241 | lookup_type_die (DECL_CONTEXT (func_decl))); | |
a3f97cbb JW |
11242 | } |
11243 | } | |
11244 | \f | |
b2932ae5 | 11245 | /* Add source coordinate attributes for the given decl. */ |
71dfc51f | 11246 | |
b2932ae5 | 11247 | static void |
7080f735 | 11248 | add_src_coords_attributes (dw_die_ref die, tree decl) |
b2932ae5 | 11249 | { |
6773e15f | 11250 | expanded_location s = expand_location (DECL_SOURCE_LOCATION (decl)); |
71dfc51f | 11251 | |
d5688810 | 11252 | add_AT_file (die, DW_AT_decl_file, lookup_filename (s.file)); |
6773e15f | 11253 | add_AT_unsigned (die, DW_AT_decl_line, s.line); |
b2932ae5 JM |
11254 | } |
11255 | ||
b20b352b | 11256 | /* Add a DW_AT_name attribute and source coordinate attribute for the |
a3f97cbb | 11257 | given decl, but only if it actually has a name. */ |
71dfc51f | 11258 | |
a3f97cbb | 11259 | static void |
7080f735 | 11260 | add_name_and_src_coords_attributes (dw_die_ref die, tree decl) |
a3f97cbb | 11261 | { |
b3694847 | 11262 | tree decl_name; |
71dfc51f | 11263 | |
556273e0 | 11264 | decl_name = DECL_NAME (decl); |
71dfc51f | 11265 | if (decl_name != NULL && IDENTIFIER_POINTER (decl_name) != NULL) |
a3f97cbb | 11266 | { |
a1d7ffe3 | 11267 | add_name_attribute (die, dwarf2_name (decl, 0)); |
a96c67ec JM |
11268 | if (! DECL_ARTIFICIAL (decl)) |
11269 | add_src_coords_attributes (die, decl); | |
e689ae67 | 11270 | |
a1d7ffe3 | 11271 | if ((TREE_CODE (decl) == FUNCTION_DECL || TREE_CODE (decl) == VAR_DECL) |
bc808e0b | 11272 | && TREE_PUBLIC (decl) |
5daf7c0a | 11273 | && DECL_ASSEMBLER_NAME (decl) != DECL_NAME (decl) |
fcc207bf AP |
11274 | && !DECL_ABSTRACT (decl) |
11275 | && !(TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))) | |
a1d7ffe3 JM |
11276 | add_AT_string (die, DW_AT_MIPS_linkage_name, |
11277 | IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl))); | |
a3f97cbb | 11278 | } |
7a0c8d71 DR |
11279 | |
11280 | #ifdef VMS_DEBUGGING_INFO | |
7a0c8d71 DR |
11281 | /* Get the function's name, as described by its RTL. This may be different |
11282 | from the DECL_NAME name used in the source file. */ | |
11283 | if (TREE_CODE (decl) == FUNCTION_DECL && TREE_ASM_WRITTEN (decl)) | |
c470afad RK |
11284 | { |
11285 | add_AT_addr (die, DW_AT_VMS_rtnbeg_pd_address, | |
11286 | XEXP (DECL_RTL (decl), 0)); | |
a1bbd445 | 11287 | VEC_safe_push (tree, gc, used_rtx_array, XEXP (DECL_RTL (decl), 0)); |
c470afad | 11288 | } |
7a0c8d71 | 11289 | #endif |
a3f97cbb JW |
11290 | } |
11291 | ||
556273e0 | 11292 | /* Push a new declaration scope. */ |
71dfc51f | 11293 | |
a3f97cbb | 11294 | static void |
7080f735 | 11295 | push_decl_scope (tree scope) |
a3f97cbb | 11296 | { |
0fdc587b | 11297 | VEC_safe_push (tree, gc, decl_scope_table, scope); |
a3f97cbb JW |
11298 | } |
11299 | ||
777ad4c2 | 11300 | /* Pop a declaration scope. */ |
2ad9852d | 11301 | |
777ad4c2 | 11302 | static inline void |
7080f735 | 11303 | pop_decl_scope (void) |
777ad4c2 | 11304 | { |
0fdc587b | 11305 | VEC_pop (tree, decl_scope_table); |
777ad4c2 JM |
11306 | } |
11307 | ||
11308 | /* Return the DIE for the scope that immediately contains this type. | |
11309 | Non-named types get global scope. Named types nested in other | |
11310 | types get their containing scope if it's open, or global scope | |
11311 | otherwise. All other types (i.e. function-local named types) get | |
11312 | the current active scope. */ | |
71dfc51f | 11313 | |
a3f97cbb | 11314 | static dw_die_ref |
7080f735 | 11315 | scope_die_for (tree t, dw_die_ref context_die) |
a3f97cbb | 11316 | { |
b3694847 SS |
11317 | dw_die_ref scope_die = NULL; |
11318 | tree containing_scope; | |
11319 | int i; | |
a3f97cbb | 11320 | |
777ad4c2 | 11321 | /* Non-types always go in the current scope. */ |
ced3f397 | 11322 | gcc_assert (TYPE_P (t)); |
777ad4c2 JM |
11323 | |
11324 | containing_scope = TYPE_CONTEXT (t); | |
ab72d377 | 11325 | |
66c78aa9 | 11326 | /* Use the containing namespace if it was passed in (for a declaration). */ |
2addbe1d | 11327 | if (containing_scope && TREE_CODE (containing_scope) == NAMESPACE_DECL) |
66c78aa9 JM |
11328 | { |
11329 | if (context_die == lookup_decl_die (containing_scope)) | |
11330 | /* OK */; | |
11331 | else | |
11332 | containing_scope = NULL_TREE; | |
11333 | } | |
2addbe1d | 11334 | |
5f2f160c JM |
11335 | /* Ignore function type "scopes" from the C frontend. They mean that |
11336 | a tagged type is local to a parmlist of a function declarator, but | |
11337 | that isn't useful to DWARF. */ | |
11338 | if (containing_scope && TREE_CODE (containing_scope) == FUNCTION_TYPE) | |
11339 | containing_scope = NULL_TREE; | |
11340 | ||
71dfc51f RK |
11341 | if (containing_scope == NULL_TREE) |
11342 | scope_die = comp_unit_die; | |
777ad4c2 | 11343 | else if (TYPE_P (containing_scope)) |
348bb3c7 | 11344 | { |
777ad4c2 JM |
11345 | /* For types, we can just look up the appropriate DIE. But |
11346 | first we check to see if we're in the middle of emitting it | |
11347 | so we know where the new DIE should go. */ | |
0fdc587b KH |
11348 | for (i = VEC_length (tree, decl_scope_table) - 1; i >= 0; --i) |
11349 | if (VEC_index (tree, decl_scope_table, i) == containing_scope) | |
348bb3c7 JM |
11350 | break; |
11351 | ||
11352 | if (i < 0) | |
11353 | { | |
ced3f397 NS |
11354 | gcc_assert (debug_info_level <= DINFO_LEVEL_TERSE |
11355 | || TREE_ASM_WRITTEN (containing_scope)); | |
348bb3c7 JM |
11356 | |
11357 | /* If none of the current dies are suitable, we get file scope. */ | |
11358 | scope_die = comp_unit_die; | |
11359 | } | |
11360 | else | |
777ad4c2 | 11361 | scope_die = lookup_type_die (containing_scope); |
348bb3c7 | 11362 | } |
a3f97cbb | 11363 | else |
777ad4c2 | 11364 | scope_die = context_die; |
71dfc51f | 11365 | |
a3f97cbb JW |
11366 | return scope_die; |
11367 | } | |
11368 | ||
2ad9852d | 11369 | /* Returns nonzero if CONTEXT_DIE is internal to a function. */ |
777ad4c2 JM |
11370 | |
11371 | static inline int | |
7080f735 | 11372 | local_scope_p (dw_die_ref context_die) |
a3f97cbb | 11373 | { |
777ad4c2 JM |
11374 | for (; context_die; context_die = context_die->die_parent) |
11375 | if (context_die->die_tag == DW_TAG_inlined_subroutine | |
11376 | || context_die->die_tag == DW_TAG_subprogram) | |
11377 | return 1; | |
2ad9852d | 11378 | |
777ad4c2 | 11379 | return 0; |
a3f97cbb JW |
11380 | } |
11381 | ||
66c78aa9 JM |
11382 | /* Returns nonzero if CONTEXT_DIE is a class or namespace, for deciding |
11383 | whether or not to treat a DIE in this context as a declaration. */ | |
9765e357 JM |
11384 | |
11385 | static inline int | |
66c78aa9 | 11386 | class_or_namespace_scope_p (dw_die_ref context_die) |
9765e357 JM |
11387 | { |
11388 | return (context_die | |
11389 | && (context_die->die_tag == DW_TAG_structure_type | |
66c78aa9 JM |
11390 | || context_die->die_tag == DW_TAG_union_type |
11391 | || context_die->die_tag == DW_TAG_namespace)); | |
9765e357 JM |
11392 | } |
11393 | ||
a3f97cbb JW |
11394 | /* Many forms of DIEs require a "type description" attribute. This |
11395 | routine locates the proper "type descriptor" die for the type given | |
b20b352b | 11396 | by 'type', and adds a DW_AT_type attribute below the given die. */ |
71dfc51f | 11397 | |
a3f97cbb | 11398 | static void |
7080f735 AJ |
11399 | add_type_attribute (dw_die_ref object_die, tree type, int decl_const, |
11400 | int decl_volatile, dw_die_ref context_die) | |
a3f97cbb | 11401 | { |
b3694847 SS |
11402 | enum tree_code code = TREE_CODE (type); |
11403 | dw_die_ref type_die = NULL; | |
a3f97cbb | 11404 | |
ef76d03b JW |
11405 | /* ??? If this type is an unnamed subrange type of an integral or |
11406 | floating-point type, use the inner type. This is because we have no | |
11407 | support for unnamed types in base_type_die. This can happen if this is | |
11408 | an Ada subrange type. Correct solution is emit a subrange type die. */ | |
b1ccbc24 RK |
11409 | if ((code == INTEGER_TYPE || code == REAL_TYPE) |
11410 | && TREE_TYPE (type) != 0 && TYPE_NAME (type) == 0) | |
11411 | type = TREE_TYPE (type), code = TREE_CODE (type); | |
11412 | ||
2ad9852d RK |
11413 | if (code == ERROR_MARK |
11414 | /* Handle a special case. For functions whose return type is void, we | |
11415 | generate *no* type attribute. (Note that no object may have type | |
11416 | `void', so this only applies to function return types). */ | |
11417 | || code == VOID_TYPE) | |
b1ccbc24 | 11418 | return; |
a3f97cbb | 11419 | |
a3f97cbb JW |
11420 | type_die = modified_type_die (type, |
11421 | decl_const || TYPE_READONLY (type), | |
11422 | decl_volatile || TYPE_VOLATILE (type), | |
ab72d377 | 11423 | context_die); |
2ad9852d | 11424 | |
a3f97cbb | 11425 | if (type_die != NULL) |
71dfc51f | 11426 | add_AT_die_ref (object_die, DW_AT_type, type_die); |
a3f97cbb JW |
11427 | } |
11428 | ||
a1c496cb EC |
11429 | /* Given an object die, add the calling convention attribute for the |
11430 | function call type. */ | |
11431 | static void | |
11432 | add_calling_convention_attribute (dw_die_ref subr_die, tree type) | |
11433 | { | |
11434 | enum dwarf_calling_convention value = DW_CC_normal; | |
11435 | ||
11436 | value = targetm.dwarf_calling_convention (type); | |
11437 | ||
b9e6959b EC |
11438 | /* Only add the attribute if the backend requests it, and |
11439 | is not DW_CC_normal. */ | |
11440 | if (value && (value != DW_CC_normal)) | |
a1c496cb EC |
11441 | add_AT_unsigned (subr_die, DW_AT_calling_convention, value); |
11442 | } | |
11443 | ||
a3f97cbb JW |
11444 | /* Given a tree pointer to a struct, class, union, or enum type node, return |
11445 | a pointer to the (string) tag name for the given type, or zero if the type | |
11446 | was declared without a tag. */ | |
71dfc51f | 11447 | |
d3e3972c | 11448 | static const char * |
7080f735 | 11449 | type_tag (tree type) |
a3f97cbb | 11450 | { |
b3694847 | 11451 | const char *name = 0; |
a3f97cbb JW |
11452 | |
11453 | if (TYPE_NAME (type) != 0) | |
11454 | { | |
b3694847 | 11455 | tree t = 0; |
a3f97cbb JW |
11456 | |
11457 | /* Find the IDENTIFIER_NODE for the type name. */ | |
11458 | if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE) | |
11459 | t = TYPE_NAME (type); | |
bdb669cb | 11460 | |
556273e0 | 11461 | /* The g++ front end makes the TYPE_NAME of *each* tagged type point to |
73c68f61 SS |
11462 | a TYPE_DECL node, regardless of whether or not a `typedef' was |
11463 | involved. */ | |
a94dbf2c JM |
11464 | else if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL |
11465 | && ! DECL_IGNORED_P (TYPE_NAME (type))) | |
a0ad3539 MM |
11466 | { |
11467 | /* We want to be extra verbose. Don't call dwarf_name if | |
11468 | DECL_NAME isn't set. The default hook for decl_printable_name | |
11469 | doesn't like that, and in this context it's correct to return | |
11470 | 0, instead of "<anonymous>" or the like. */ | |
11471 | if (DECL_NAME (TYPE_NAME (type))) | |
11472 | name = lang_hooks.dwarf_name (TYPE_NAME (type), 2); | |
11473 | } | |
bdb669cb | 11474 | |
a3f97cbb | 11475 | /* Now get the name as a string, or invent one. */ |
a0ad3539 | 11476 | if (!name && t != 0) |
a94dbf2c | 11477 | name = IDENTIFIER_POINTER (t); |
a3f97cbb | 11478 | } |
71dfc51f | 11479 | |
a3f97cbb JW |
11480 | return (name == 0 || *name == '\0') ? 0 : name; |
11481 | } | |
11482 | ||
11483 | /* Return the type associated with a data member, make a special check | |
11484 | for bit field types. */ | |
71dfc51f RK |
11485 | |
11486 | static inline tree | |
7080f735 | 11487 | member_declared_type (tree member) |
a3f97cbb | 11488 | { |
71dfc51f | 11489 | return (DECL_BIT_FIELD_TYPE (member) |
2ad9852d | 11490 | ? DECL_BIT_FIELD_TYPE (member) : TREE_TYPE (member)); |
a3f97cbb JW |
11491 | } |
11492 | ||
d291dd49 | 11493 | /* Get the decl's label, as described by its RTL. This may be different |
a3f97cbb | 11494 | from the DECL_NAME name used in the source file. */ |
71dfc51f | 11495 | |
487a6e06 | 11496 | #if 0 |
d3e3972c | 11497 | static const char * |
7080f735 | 11498 | decl_start_label (tree decl) |
a3f97cbb JW |
11499 | { |
11500 | rtx x; | |
d3e3972c | 11501 | const char *fnname; |
2ad9852d | 11502 | |
a3f97cbb | 11503 | x = DECL_RTL (decl); |
ced3f397 | 11504 | gcc_assert (MEM_P (x)); |
71dfc51f | 11505 | |
a3f97cbb | 11506 | x = XEXP (x, 0); |
ced3f397 | 11507 | gcc_assert (GET_CODE (x) == SYMBOL_REF); |
71dfc51f | 11508 | |
a3f97cbb JW |
11509 | fnname = XSTR (x, 0); |
11510 | return fnname; | |
11511 | } | |
487a6e06 | 11512 | #endif |
a3f97cbb | 11513 | \f |
956d6950 | 11514 | /* These routines generate the internal representation of the DIE's for |
a3f97cbb | 11515 | the compilation unit. Debugging information is collected by walking |
88dad228 | 11516 | the declaration trees passed in from dwarf2out_decl(). */ |
a3f97cbb JW |
11517 | |
11518 | static void | |
7080f735 | 11519 | gen_array_type_die (tree type, dw_die_ref context_die) |
a3f97cbb | 11520 | { |
b3694847 SS |
11521 | dw_die_ref scope_die = scope_die_for (type, context_die); |
11522 | dw_die_ref array_die; | |
11523 | tree element_type; | |
bdb669cb | 11524 | |
a9d38797 JM |
11525 | /* ??? The SGI dwarf reader fails for array of array of enum types unless |
11526 | the inner array type comes before the outer array type. Thus we must | |
11527 | call gen_type_die before we call new_die. See below also. */ | |
11528 | #ifdef MIPS_DEBUGGING_INFO | |
11529 | gen_type_die (TREE_TYPE (type), context_die); | |
11530 | #endif | |
11531 | ||
54ba1f0d | 11532 | array_die = new_die (DW_TAG_array_type, scope_die, type); |
84f0ace0 JM |
11533 | add_name_attribute (array_die, type_tag (type)); |
11534 | equate_type_number_to_die (type, array_die); | |
11535 | ||
11536 | if (TREE_CODE (type) == VECTOR_TYPE) | |
11537 | { | |
11538 | /* The frontend feeds us a representation for the vector as a struct | |
11539 | containing an array. Pull out the array type. */ | |
11540 | type = TREE_TYPE (TYPE_FIELDS (TYPE_DEBUG_REPRESENTATION_TYPE (type))); | |
11541 | add_AT_flag (array_die, DW_AT_GNU_vector, 1); | |
11542 | } | |
a9d38797 | 11543 | |
a3f97cbb JW |
11544 | #if 0 |
11545 | /* We default the array ordering. SDB will probably do | |
11546 | the right things even if DW_AT_ordering is not present. It's not even | |
11547 | an issue until we start to get into multidimensional arrays anyway. If | |
11548 | SDB is ever caught doing the Wrong Thing for multi-dimensional arrays, | |
11549 | then we'll have to put the DW_AT_ordering attribute back in. (But if | |
11550 | and when we find out that we need to put these in, we will only do so | |
11551 | for multidimensional arrays. */ | |
11552 | add_AT_unsigned (array_die, DW_AT_ordering, DW_ORD_row_major); | |
11553 | #endif | |
11554 | ||
a9d38797 | 11555 | #ifdef MIPS_DEBUGGING_INFO |
4edb7b60 JM |
11556 | /* The SGI compilers handle arrays of unknown bound by setting |
11557 | AT_declaration and not emitting any subrange DIEs. */ | |
a9d38797 | 11558 | if (! TYPE_DOMAIN (type)) |
371e8c4f | 11559 | add_AT_flag (array_die, DW_AT_declaration, 1); |
a9d38797 JM |
11560 | else |
11561 | #endif | |
11562 | add_subscript_info (array_die, type); | |
a3f97cbb | 11563 | |
a3f97cbb JW |
11564 | /* Add representation of the type of the elements of this array type. */ |
11565 | element_type = TREE_TYPE (type); | |
71dfc51f | 11566 | |
a3f97cbb JW |
11567 | /* ??? The SGI dwarf reader fails for multidimensional arrays with a |
11568 | const enum type. E.g. const enum machine_mode insn_operand_mode[2][10]. | |
11569 | We work around this by disabling this feature. See also | |
11570 | add_subscript_info. */ | |
11571 | #ifndef MIPS_DEBUGGING_INFO | |
71dfc51f RK |
11572 | while (TREE_CODE (element_type) == ARRAY_TYPE) |
11573 | element_type = TREE_TYPE (element_type); | |
11574 | ||
a3f97cbb | 11575 | gen_type_die (element_type, context_die); |
a9d38797 | 11576 | #endif |
a3f97cbb JW |
11577 | |
11578 | add_type_attribute (array_die, element_type, 0, 0, context_die); | |
89708594 CT |
11579 | |
11580 | if (get_AT (array_die, DW_AT_name)) | |
11581 | add_pubtype (type, array_die); | |
a3f97cbb JW |
11582 | } |
11583 | ||
d6f4ec51 | 11584 | #if 0 |
a3f97cbb | 11585 | static void |
7080f735 | 11586 | gen_entry_point_die (tree decl, dw_die_ref context_die) |
a3f97cbb | 11587 | { |
b3694847 | 11588 | tree origin = decl_ultimate_origin (decl); |
54ba1f0d | 11589 | dw_die_ref decl_die = new_die (DW_TAG_entry_point, context_die, decl); |
2ad9852d | 11590 | |
a3f97cbb | 11591 | if (origin != NULL) |
71dfc51f | 11592 | add_abstract_origin_attribute (decl_die, origin); |
a3f97cbb JW |
11593 | else |
11594 | { | |
11595 | add_name_and_src_coords_attributes (decl_die, decl); | |
a3f97cbb JW |
11596 | add_type_attribute (decl_die, TREE_TYPE (TREE_TYPE (decl)), |
11597 | 0, 0, context_die); | |
11598 | } | |
71dfc51f | 11599 | |
a3f97cbb | 11600 | if (DECL_ABSTRACT (decl)) |
71dfc51f | 11601 | equate_decl_number_to_die (decl, decl_die); |
a3f97cbb | 11602 | else |
71dfc51f | 11603 | add_AT_lbl_id (decl_die, DW_AT_low_pc, decl_start_label (decl)); |
a3f97cbb | 11604 | } |
d6f4ec51 | 11605 | #endif |
a3f97cbb | 11606 | |
8a8c3656 JM |
11607 | /* Walk through the list of incomplete types again, trying once more to |
11608 | emit full debugging info for them. */ | |
11609 | ||
11610 | static void | |
7080f735 | 11611 | retry_incomplete_types (void) |
8a8c3656 | 11612 | { |
244a4af0 | 11613 | int i; |
2ad9852d | 11614 | |
887fb69b KH |
11615 | for (i = VEC_length (tree, incomplete_types) - 1; i >= 0; i--) |
11616 | gen_type_die (VEC_index (tree, incomplete_types, i), comp_unit_die); | |
8a8c3656 JM |
11617 | } |
11618 | ||
a3f97cbb | 11619 | /* Generate a DIE to represent an inlined instance of an enumeration type. */ |
71dfc51f | 11620 | |
a3f97cbb | 11621 | static void |
7080f735 | 11622 | gen_inlined_enumeration_type_die (tree type, dw_die_ref context_die) |
a3f97cbb | 11623 | { |
54ba1f0d | 11624 | dw_die_ref type_die = new_die (DW_TAG_enumeration_type, context_die, type); |
2ad9852d | 11625 | |
bbc6ae08 NC |
11626 | /* We do not check for TREE_ASM_WRITTEN (type) being set, as the type may |
11627 | be incomplete and such types are not marked. */ | |
a3f97cbb JW |
11628 | add_abstract_origin_attribute (type_die, type); |
11629 | } | |
11630 | ||
11631 | /* Generate a DIE to represent an inlined instance of a structure type. */ | |
71dfc51f | 11632 | |
a3f97cbb | 11633 | static void |
7080f735 | 11634 | gen_inlined_structure_type_die (tree type, dw_die_ref context_die) |
a3f97cbb | 11635 | { |
54ba1f0d | 11636 | dw_die_ref type_die = new_die (DW_TAG_structure_type, context_die, type); |
777ad4c2 | 11637 | |
bbc6ae08 NC |
11638 | /* We do not check for TREE_ASM_WRITTEN (type) being set, as the type may |
11639 | be incomplete and such types are not marked. */ | |
a3f97cbb JW |
11640 | add_abstract_origin_attribute (type_die, type); |
11641 | } | |
11642 | ||
11643 | /* Generate a DIE to represent an inlined instance of a union type. */ | |
71dfc51f | 11644 | |
a3f97cbb | 11645 | static void |
7080f735 | 11646 | gen_inlined_union_type_die (tree type, dw_die_ref context_die) |
a3f97cbb | 11647 | { |
54ba1f0d | 11648 | dw_die_ref type_die = new_die (DW_TAG_union_type, context_die, type); |
777ad4c2 | 11649 | |
bbc6ae08 NC |
11650 | /* We do not check for TREE_ASM_WRITTEN (type) being set, as the type may |
11651 | be incomplete and such types are not marked. */ | |
a3f97cbb JW |
11652 | add_abstract_origin_attribute (type_die, type); |
11653 | } | |
11654 | ||
11655 | /* Generate a DIE to represent an enumeration type. Note that these DIEs | |
11656 | include all of the information about the enumeration values also. Each | |
273dbe67 JM |
11657 | enumerated type name/value is listed as a child of the enumerated type |
11658 | DIE. */ | |
71dfc51f | 11659 | |
de99511b | 11660 | static dw_die_ref |
7080f735 | 11661 | gen_enumeration_type_die (tree type, dw_die_ref context_die) |
a3f97cbb | 11662 | { |
b3694847 | 11663 | dw_die_ref type_die = lookup_type_die (type); |
273dbe67 | 11664 | |
a3f97cbb JW |
11665 | if (type_die == NULL) |
11666 | { | |
11667 | type_die = new_die (DW_TAG_enumeration_type, | |
54ba1f0d | 11668 | scope_die_for (type, context_die), type); |
a3f97cbb JW |
11669 | equate_type_number_to_die (type, type_die); |
11670 | add_name_attribute (type_die, type_tag (type)); | |
a3f97cbb | 11671 | } |
273dbe67 | 11672 | else if (! TYPE_SIZE (type)) |
de99511b | 11673 | return type_die; |
273dbe67 JM |
11674 | else |
11675 | remove_AT (type_die, DW_AT_declaration); | |
11676 | ||
11677 | /* Handle a GNU C/C++ extension, i.e. incomplete enum types. If the | |
11678 | given enum type is incomplete, do not generate the DW_AT_byte_size | |
11679 | attribute or the DW_AT_element_list attribute. */ | |
11680 | if (TYPE_SIZE (type)) | |
a3f97cbb | 11681 | { |
b3694847 | 11682 | tree link; |
71dfc51f | 11683 | |
a082c85a | 11684 | TREE_ASM_WRITTEN (type) = 1; |
273dbe67 | 11685 | add_byte_size_attribute (type_die, type); |
e9a25f70 | 11686 | if (TYPE_STUB_DECL (type) != NULL_TREE) |
b2932ae5 | 11687 | add_src_coords_attributes (type_die, TYPE_STUB_DECL (type)); |
71dfc51f | 11688 | |
ef76d03b JW |
11689 | /* If the first reference to this type was as the return type of an |
11690 | inline function, then it may not have a parent. Fix this now. */ | |
11691 | if (type_die->die_parent == NULL) | |
11692 | add_child_die (scope_die_for (type, context_die), type_die); | |
11693 | ||
eb34af89 | 11694 | for (link = TYPE_VALUES (type); |
273dbe67 | 11695 | link != NULL; link = TREE_CHAIN (link)) |
a3f97cbb | 11696 | { |
54ba1f0d | 11697 | dw_die_ref enum_die = new_die (DW_TAG_enumerator, type_die, link); |
5bb2ed2c | 11698 | tree value = TREE_VALUE (link); |
71dfc51f | 11699 | |
273dbe67 JM |
11700 | add_name_attribute (enum_die, |
11701 | IDENTIFIER_POINTER (TREE_PURPOSE (link))); | |
665f2503 | 11702 | |
8df83eae | 11703 | if (host_integerp (value, TYPE_UNSIGNED (TREE_TYPE (value)))) |
5bb2ed2c MM |
11704 | /* DWARF2 does not provide a way of indicating whether or |
11705 | not enumeration constants are signed or unsigned. GDB | |
11706 | always assumes the values are signed, so we output all | |
11707 | values as if they were signed. That means that | |
11708 | enumeration constants with very large unsigned values | |
11709 | will appear to have negative values in the debugger. */ | |
11710 | add_AT_int (enum_die, DW_AT_const_value, | |
11711 | tree_low_cst (value, tree_int_cst_sgn (value) > 0)); | |
a3f97cbb JW |
11712 | } |
11713 | } | |
273dbe67 JM |
11714 | else |
11715 | add_AT_flag (type_die, DW_AT_declaration, 1); | |
de99511b | 11716 | |
89708594 CT |
11717 | if (get_AT (type_die, DW_AT_name)) |
11718 | add_pubtype (type, type_die); | |
11719 | ||
de99511b | 11720 | return type_die; |
a3f97cbb JW |
11721 | } |
11722 | ||
a3f97cbb JW |
11723 | /* Generate a DIE to represent either a real live formal parameter decl or to |
11724 | represent just the type of some formal parameter position in some function | |
11725 | type. | |
71dfc51f | 11726 | |
a3f97cbb JW |
11727 | Note that this routine is a bit unusual because its argument may be a |
11728 | ..._DECL node (i.e. either a PARM_DECL or perhaps a VAR_DECL which | |
11729 | represents an inlining of some PARM_DECL) or else some sort of a ..._TYPE | |
11730 | node. If it's the former then this function is being called to output a | |
11731 | DIE to represent a formal parameter object (or some inlining thereof). If | |
11732 | it's the latter, then this function is only being called to output a | |
11733 | DW_TAG_formal_parameter DIE to stand as a placeholder for some formal | |
11734 | argument type of some subprogram type. */ | |
71dfc51f | 11735 | |
a94dbf2c | 11736 | static dw_die_ref |
7080f735 | 11737 | gen_formal_parameter_die (tree node, dw_die_ref context_die) |
a3f97cbb | 11738 | { |
b3694847 | 11739 | dw_die_ref parm_die |
54ba1f0d | 11740 | = new_die (DW_TAG_formal_parameter, context_die, node); |
b3694847 | 11741 | tree origin; |
71dfc51f | 11742 | |
a3f97cbb JW |
11743 | switch (TREE_CODE_CLASS (TREE_CODE (node))) |
11744 | { | |
6615c446 | 11745 | case tcc_declaration: |
a3f97cbb JW |
11746 | origin = decl_ultimate_origin (node); |
11747 | if (origin != NULL) | |
a94dbf2c | 11748 | add_abstract_origin_attribute (parm_die, origin); |
a3f97cbb JW |
11749 | else |
11750 | { | |
11751 | add_name_and_src_coords_attributes (parm_die, node); | |
11752 | add_type_attribute (parm_die, TREE_TYPE (node), | |
11753 | TREE_READONLY (node), | |
11754 | TREE_THIS_VOLATILE (node), | |
11755 | context_die); | |
bdb669cb JM |
11756 | if (DECL_ARTIFICIAL (node)) |
11757 | add_AT_flag (parm_die, DW_AT_artificial, 1); | |
a3f97cbb | 11758 | } |
71dfc51f | 11759 | |
141719a8 JM |
11760 | equate_decl_number_to_die (node, parm_die); |
11761 | if (! DECL_ABSTRACT (node)) | |
0a2d3d69 | 11762 | add_location_or_const_value_attribute (parm_die, node, DW_AT_location); |
71dfc51f | 11763 | |
a3f97cbb JW |
11764 | break; |
11765 | ||
6615c446 | 11766 | case tcc_type: |
71dfc51f | 11767 | /* We were called with some kind of a ..._TYPE node. */ |
a3f97cbb JW |
11768 | add_type_attribute (parm_die, node, 0, 0, context_die); |
11769 | break; | |
11770 | ||
a3f97cbb | 11771 | default: |
ced3f397 | 11772 | gcc_unreachable (); |
a3f97cbb | 11773 | } |
71dfc51f | 11774 | |
a94dbf2c | 11775 | return parm_die; |
a3f97cbb JW |
11776 | } |
11777 | ||
11778 | /* Generate a special type of DIE used as a stand-in for a trailing ellipsis | |
11779 | at the end of an (ANSI prototyped) formal parameters list. */ | |
71dfc51f | 11780 | |
a3f97cbb | 11781 | static void |
7080f735 | 11782 | gen_unspecified_parameters_die (tree decl_or_type, dw_die_ref context_die) |
a3f97cbb | 11783 | { |
54ba1f0d | 11784 | new_die (DW_TAG_unspecified_parameters, context_die, decl_or_type); |
a3f97cbb JW |
11785 | } |
11786 | ||
11787 | /* Generate a list of nameless DW_TAG_formal_parameter DIEs (and perhaps a | |
11788 | DW_TAG_unspecified_parameters DIE) to represent the types of the formal | |
11789 | parameters as specified in some function type specification (except for | |
1cfdcc15 | 11790 | those which appear as part of a function *definition*). */ |
71dfc51f | 11791 | |
a3f97cbb | 11792 | static void |
7080f735 | 11793 | gen_formal_types_die (tree function_or_method_type, dw_die_ref context_die) |
a3f97cbb | 11794 | { |
b3694847 SS |
11795 | tree link; |
11796 | tree formal_type = NULL; | |
11797 | tree first_parm_type; | |
5daf7c0a | 11798 | tree arg; |
a3f97cbb | 11799 | |
5daf7c0a JM |
11800 | if (TREE_CODE (function_or_method_type) == FUNCTION_DECL) |
11801 | { | |
11802 | arg = DECL_ARGUMENTS (function_or_method_type); | |
11803 | function_or_method_type = TREE_TYPE (function_or_method_type); | |
11804 | } | |
11805 | else | |
11806 | arg = NULL_TREE; | |
c26fbbca | 11807 | |
5daf7c0a | 11808 | first_parm_type = TYPE_ARG_TYPES (function_or_method_type); |
a3f97cbb | 11809 | |
556273e0 | 11810 | /* Make our first pass over the list of formal parameter types and output a |
a3f97cbb | 11811 | DW_TAG_formal_parameter DIE for each one. */ |
5daf7c0a | 11812 | for (link = first_parm_type; link; ) |
a3f97cbb | 11813 | { |
b3694847 | 11814 | dw_die_ref parm_die; |
556273e0 | 11815 | |
a3f97cbb JW |
11816 | formal_type = TREE_VALUE (link); |
11817 | if (formal_type == void_type_node) | |
11818 | break; | |
11819 | ||
11820 | /* Output a (nameless) DIE to represent the formal parameter itself. */ | |
a94dbf2c | 11821 | parm_die = gen_formal_parameter_die (formal_type, context_die); |
5daf7c0a JM |
11822 | if ((TREE_CODE (function_or_method_type) == METHOD_TYPE |
11823 | && link == first_parm_type) | |
11824 | || (arg && DECL_ARTIFICIAL (arg))) | |
a94dbf2c | 11825 | add_AT_flag (parm_die, DW_AT_artificial, 1); |
5daf7c0a JM |
11826 | |
11827 | link = TREE_CHAIN (link); | |
11828 | if (arg) | |
11829 | arg = TREE_CHAIN (arg); | |
a3f97cbb JW |
11830 | } |
11831 | ||
11832 | /* If this function type has an ellipsis, add a | |
11833 | DW_TAG_unspecified_parameters DIE to the end of the parameter list. */ | |
11834 | if (formal_type != void_type_node) | |
11835 | gen_unspecified_parameters_die (function_or_method_type, context_die); | |
11836 | ||
556273e0 | 11837 | /* Make our second (and final) pass over the list of formal parameter types |
a3f97cbb JW |
11838 | and output DIEs to represent those types (as necessary). */ |
11839 | for (link = TYPE_ARG_TYPES (function_or_method_type); | |
2ad9852d | 11840 | link && TREE_VALUE (link); |
a3f97cbb | 11841 | link = TREE_CHAIN (link)) |
2ad9852d | 11842 | gen_type_die (TREE_VALUE (link), context_die); |
a3f97cbb JW |
11843 | } |
11844 | ||
10a11b75 JM |
11845 | /* We want to generate the DIE for TYPE so that we can generate the |
11846 | die for MEMBER, which has been defined; we will need to refer back | |
11847 | to the member declaration nested within TYPE. If we're trying to | |
11848 | generate minimal debug info for TYPE, processing TYPE won't do the | |
11849 | trick; we need to attach the member declaration by hand. */ | |
11850 | ||
11851 | static void | |
7080f735 | 11852 | gen_type_die_for_member (tree type, tree member, dw_die_ref context_die) |
10a11b75 JM |
11853 | { |
11854 | gen_type_die (type, context_die); | |
11855 | ||
11856 | /* If we're trying to avoid duplicate debug info, we may not have | |
11857 | emitted the member decl for this function. Emit it now. */ | |
11858 | if (TYPE_DECL_SUPPRESS_DEBUG (TYPE_STUB_DECL (type)) | |
11859 | && ! lookup_decl_die (member)) | |
11860 | { | |
a288c5cd | 11861 | dw_die_ref type_die; |
ced3f397 | 11862 | gcc_assert (!decl_ultimate_origin (member)); |
10a11b75 JM |
11863 | |
11864 | push_decl_scope (type); | |
a288c5cd | 11865 | type_die = lookup_type_die (type); |
10a11b75 | 11866 | if (TREE_CODE (member) == FUNCTION_DECL) |
a288c5cd JJ |
11867 | gen_subprogram_die (member, type_die); |
11868 | else if (TREE_CODE (member) == FIELD_DECL) | |
11869 | { | |
11870 | /* Ignore the nameless fields that are used to skip bits but handle | |
11871 | C++ anonymous unions and structs. */ | |
11872 | if (DECL_NAME (member) != NULL_TREE | |
11873 | || TREE_CODE (TREE_TYPE (member)) == UNION_TYPE | |
11874 | || TREE_CODE (TREE_TYPE (member)) == RECORD_TYPE) | |
11875 | { | |
11876 | gen_type_die (member_declared_type (member), type_die); | |
11877 | gen_field_die (member, type_die); | |
11878 | } | |
11879 | } | |
10a11b75 | 11880 | else |
a288c5cd | 11881 | gen_variable_die (member, type_die); |
2ad9852d | 11882 | |
10a11b75 JM |
11883 | pop_decl_scope (); |
11884 | } | |
11885 | } | |
11886 | ||
2ad9852d RK |
11887 | /* Generate the DWARF2 info for the "abstract" instance of a function which we |
11888 | may later generate inlined and/or out-of-line instances of. */ | |
10a11b75 | 11889 | |
e1772ac0 | 11890 | static void |
7080f735 | 11891 | dwarf2out_abstract_function (tree decl) |
10a11b75 | 11892 | { |
b3694847 | 11893 | dw_die_ref old_die; |
777ad4c2 | 11894 | tree save_fn; |
6193b8b7 | 11895 | struct function *save_cfun; |
5daf7c0a JM |
11896 | tree context; |
11897 | int was_abstract = DECL_ABSTRACT (decl); | |
11898 | ||
11899 | /* Make sure we have the actual abstract inline, not a clone. */ | |
11900 | decl = DECL_ORIGIN (decl); | |
10a11b75 | 11901 | |
c26fbbca | 11902 | old_die = lookup_decl_die (decl); |
ae0f3477 | 11903 | if (old_die && get_AT (old_die, DW_AT_inline)) |
10a11b75 JM |
11904 | /* We've already generated the abstract instance. */ |
11905 | return; | |
11906 | ||
5daf7c0a JM |
11907 | /* Be sure we've emitted the in-class declaration DIE (if any) first, so |
11908 | we don't get confused by DECL_ABSTRACT. */ | |
8458e954 JS |
11909 | if (debug_info_level > DINFO_LEVEL_TERSE) |
11910 | { | |
11911 | context = decl_class_context (decl); | |
11912 | if (context) | |
11913 | gen_type_die_for_member | |
11914 | (context, decl, decl_function_context (decl) ? NULL : comp_unit_die); | |
11915 | } | |
c26fbbca | 11916 | |
5daf7c0a | 11917 | /* Pretend we've just finished compiling this function. */ |
777ad4c2 | 11918 | save_fn = current_function_decl; |
6193b8b7 | 11919 | save_cfun = cfun; |
777ad4c2 | 11920 | current_function_decl = decl; |
6193b8b7 | 11921 | cfun = DECL_STRUCT_FUNCTION (decl); |
777ad4c2 | 11922 | |
10a11b75 JM |
11923 | set_decl_abstract_flags (decl, 1); |
11924 | dwarf2out_decl (decl); | |
5daf7c0a JM |
11925 | if (! was_abstract) |
11926 | set_decl_abstract_flags (decl, 0); | |
777ad4c2 JM |
11927 | |
11928 | current_function_decl = save_fn; | |
6193b8b7 | 11929 | cfun = save_cfun; |
10a11b75 JM |
11930 | } |
11931 | ||
33c9159e AH |
11932 | /* Helper function of premark_used_types() which gets called through |
11933 | htab_traverse_resize(). | |
11934 | ||
11935 | Marks the DIE of a given type in *SLOT as perennial, so it never gets | |
11936 | marked as unused by prune_unused_types. */ | |
11937 | static int | |
11938 | premark_used_types_helper (void **slot, void *data ATTRIBUTE_UNUSED) | |
11939 | { | |
11940 | tree type; | |
11941 | dw_die_ref die; | |
11942 | ||
11943 | type = *slot; | |
11944 | die = lookup_type_die (type); | |
11945 | if (die != NULL) | |
11946 | die->die_perennial_p = 1; | |
11947 | return 1; | |
11948 | } | |
11949 | ||
11950 | /* Mark all members of used_types_hash as perennial. */ | |
11951 | static void | |
11952 | premark_used_types (void) | |
11953 | { | |
11954 | if (cfun && cfun->used_types_hash) | |
11955 | htab_traverse (cfun->used_types_hash, premark_used_types_helper, NULL); | |
11956 | } | |
11957 | ||
a3f97cbb JW |
11958 | /* Generate a DIE to represent a declared function (either file-scope or |
11959 | block-local). */ | |
71dfc51f | 11960 | |
a3f97cbb | 11961 | static void |
7080f735 | 11962 | gen_subprogram_die (tree decl, dw_die_ref context_die) |
a3f97cbb JW |
11963 | { |
11964 | char label_id[MAX_ARTIFICIAL_LABEL_BYTES]; | |
b3694847 SS |
11965 | tree origin = decl_ultimate_origin (decl); |
11966 | dw_die_ref subr_die; | |
b3694847 SS |
11967 | tree fn_arg_types; |
11968 | tree outer_scope; | |
11969 | dw_die_ref old_die = lookup_decl_die (decl); | |
11970 | int declaration = (current_function_decl != decl | |
66c78aa9 | 11971 | || class_or_namespace_scope_p (context_die)); |
a3f97cbb | 11972 | |
6193b8b7 | 11973 | premark_used_types (); |
33c9159e | 11974 | |
2ad9852d RK |
11975 | /* It is possible to have both DECL_ABSTRACT and DECLARATION be true if we |
11976 | started to generate the abstract instance of an inline, decided to output | |
11977 | its containing class, and proceeded to emit the declaration of the inline | |
11978 | from the member list for the class. If so, DECLARATION takes priority; | |
11979 | we'll get back to the abstract instance when done with the class. */ | |
10a11b75 | 11980 | |
1cfdcc15 | 11981 | /* The class-scope declaration DIE must be the primary DIE. */ |
66c78aa9 | 11982 | if (origin && declaration && class_or_namespace_scope_p (context_die)) |
1cfdcc15 JM |
11983 | { |
11984 | origin = NULL; | |
ced3f397 | 11985 | gcc_assert (!old_die); |
1cfdcc15 JM |
11986 | } |
11987 | ||
d3e4cd01 JM |
11988 | /* Now that the C++ front end lazily declares artificial member fns, we |
11989 | might need to retrofit the declaration into its class. */ | |
11990 | if (!declaration && !origin && !old_die | |
11991 | && DECL_CONTEXT (decl) && TYPE_P (DECL_CONTEXT (decl)) | |
11992 | && !class_or_namespace_scope_p (context_die) | |
11993 | && debug_info_level > DINFO_LEVEL_TERSE) | |
11994 | old_die = force_decl_die (decl); | |
11995 | ||
a3f97cbb JW |
11996 | if (origin != NULL) |
11997 | { | |
ced3f397 | 11998 | gcc_assert (!declaration || local_scope_p (context_die)); |
10a11b75 | 11999 | |
8d8238b6 JM |
12000 | /* Fixup die_parent for the abstract instance of a nested |
12001 | inline function. */ | |
12002 | if (old_die && old_die->die_parent == NULL) | |
12003 | add_child_die (context_die, old_die); | |
12004 | ||
54ba1f0d | 12005 | subr_die = new_die (DW_TAG_subprogram, context_die, decl); |
a3f97cbb JW |
12006 | add_abstract_origin_attribute (subr_die, origin); |
12007 | } | |
bdb669cb JM |
12008 | else if (old_die) |
12009 | { | |
6773e15f | 12010 | expanded_location s = expand_location (DECL_SOURCE_LOCATION (decl)); |
d5688810 | 12011 | struct dwarf_file_data * file_index = lookup_filename (s.file); |
a94dbf2c | 12012 | |
1edf43d6 JM |
12013 | if (!get_AT_flag (old_die, DW_AT_declaration) |
12014 | /* We can have a normal definition following an inline one in the | |
12015 | case of redefinition of GNU C extern inlines. | |
12016 | It seems reasonable to use AT_specification in this case. */ | |
ae0f3477 | 12017 | && !get_AT (old_die, DW_AT_inline)) |
b75ab88b | 12018 | { |
9acf766f DB |
12019 | /* Detect and ignore this case, where we are trying to output |
12020 | something we have already output. */ | |
ced3f397 | 12021 | return; |
b75ab88b | 12022 | } |
4b674448 JM |
12023 | |
12024 | /* If the definition comes from the same place as the declaration, | |
a94dbf2c JM |
12025 | maybe use the old DIE. We always want the DIE for this function |
12026 | that has the *_pc attributes to be under comp_unit_die so the | |
cb9e9d8d JM |
12027 | debugger can find it. We also need to do this for abstract |
12028 | instances of inlines, since the spec requires the out-of-line copy | |
12029 | to have the same parent. For local class methods, this doesn't | |
12030 | apply; we just use the old DIE. */ | |
12031 | if ((old_die->die_parent == comp_unit_die || context_die == NULL) | |
a96c67ec | 12032 | && (DECL_ARTIFICIAL (decl) |
d5688810 | 12033 | || (get_AT_file (old_die, DW_AT_decl_file) == file_index |
a96c67ec | 12034 | && (get_AT_unsigned (old_die, DW_AT_decl_line) |
6773e15f | 12035 | == (unsigned) s.line)))) |
bdb669cb | 12036 | { |
4b674448 JM |
12037 | subr_die = old_die; |
12038 | ||
6097b0c3 | 12039 | /* Clear out the declaration attribute and the formal parameters. |
a1c496cb | 12040 | Do not remove all children, because it is possible that this |
6097b0c3 DP |
12041 | declaration die was forced using force_decl_die(). In such |
12042 | cases die that forced declaration die (e.g. TAG_imported_module) | |
12043 | is one of the children that we do not want to remove. */ | |
4b674448 | 12044 | remove_AT (subr_die, DW_AT_declaration); |
6097b0c3 | 12045 | remove_child_TAG (subr_die, DW_TAG_formal_parameter); |
4b674448 JM |
12046 | } |
12047 | else | |
12048 | { | |
54ba1f0d | 12049 | subr_die = new_die (DW_TAG_subprogram, context_die, decl); |
47fcfa7b | 12050 | add_AT_specification (subr_die, old_die); |
d5688810 GK |
12051 | if (get_AT_file (old_die, DW_AT_decl_file) != file_index) |
12052 | add_AT_file (subr_die, DW_AT_decl_file, file_index); | |
12053 | if (get_AT_unsigned (old_die, DW_AT_decl_line) != (unsigned) s.line) | |
12054 | add_AT_unsigned (subr_die, DW_AT_decl_line, s.line); | |
bdb669cb JM |
12055 | } |
12056 | } | |
a3f97cbb JW |
12057 | else |
12058 | { | |
54ba1f0d | 12059 | subr_die = new_die (DW_TAG_subprogram, context_die, decl); |
556273e0 | 12060 | |
273dbe67 JM |
12061 | if (TREE_PUBLIC (decl)) |
12062 | add_AT_flag (subr_die, DW_AT_external, 1); | |
71dfc51f | 12063 | |
a3f97cbb | 12064 | add_name_and_src_coords_attributes (subr_die, decl); |
4927276d JM |
12065 | if (debug_info_level > DINFO_LEVEL_TERSE) |
12066 | { | |
2ad9852d RK |
12067 | add_prototyped_attribute (subr_die, TREE_TYPE (decl)); |
12068 | add_type_attribute (subr_die, TREE_TYPE (TREE_TYPE (decl)), | |
12069 | 0, 0, context_die); | |
4927276d | 12070 | } |
71dfc51f | 12071 | |
a3f97cbb | 12072 | add_pure_or_virtual_attribute (subr_die, decl); |
273dbe67 JM |
12073 | if (DECL_ARTIFICIAL (decl)) |
12074 | add_AT_flag (subr_die, DW_AT_artificial, 1); | |
2ad9852d | 12075 | |
a94dbf2c JM |
12076 | if (TREE_PROTECTED (decl)) |
12077 | add_AT_unsigned (subr_die, DW_AT_accessibility, DW_ACCESS_protected); | |
12078 | else if (TREE_PRIVATE (decl)) | |
12079 | add_AT_unsigned (subr_die, DW_AT_accessibility, DW_ACCESS_private); | |
a3f97cbb | 12080 | } |
4edb7b60 | 12081 | |
a94dbf2c JM |
12082 | if (declaration) |
12083 | { | |
ae0f3477 | 12084 | if (!old_die || !get_AT (old_die, DW_AT_inline)) |
1edf43d6 JM |
12085 | { |
12086 | add_AT_flag (subr_die, DW_AT_declaration, 1); | |
12087 | ||
12088 | /* The first time we see a member function, it is in the context of | |
12089 | the class to which it belongs. We make sure of this by emitting | |
12090 | the class first. The next time is the definition, which is | |
a1c496cb | 12091 | handled above. The two may come from the same source text. |
6097b0c3 DP |
12092 | |
12093 | Note that force_decl_die() forces function declaration die. It is | |
12094 | later reused to represent definition. */ | |
d3e4cd01 | 12095 | equate_decl_number_to_die (decl, subr_die); |
1edf43d6 | 12096 | } |
a94dbf2c JM |
12097 | } |
12098 | else if (DECL_ABSTRACT (decl)) | |
a3f97cbb | 12099 | { |
1bb17c21 | 12100 | if (DECL_DECLARED_INLINE_P (decl)) |
61b32c02 | 12101 | { |
2878ea73 | 12102 | if (cgraph_function_possibly_inlined_p (decl)) |
61b32c02 JM |
12103 | add_AT_unsigned (subr_die, DW_AT_inline, DW_INL_declared_inlined); |
12104 | else | |
1bb17c21 | 12105 | add_AT_unsigned (subr_die, DW_AT_inline, DW_INL_declared_not_inlined); |
61b32c02 | 12106 | } |
61b32c02 | 12107 | else |
1bb17c21 JH |
12108 | { |
12109 | if (cgraph_function_possibly_inlined_p (decl)) | |
2878ea73 | 12110 | add_AT_unsigned (subr_die, DW_AT_inline, DW_INL_inlined); |
1bb17c21 | 12111 | else |
2878ea73 | 12112 | add_AT_unsigned (subr_die, DW_AT_inline, DW_INL_not_inlined); |
1bb17c21 | 12113 | } |
61b32c02 | 12114 | |
a3f97cbb JW |
12115 | equate_decl_number_to_die (decl, subr_die); |
12116 | } | |
12117 | else if (!DECL_EXTERNAL (decl)) | |
12118 | { | |
35d177a2 AO |
12119 | HOST_WIDE_INT cfa_fb_offset; |
12120 | ||
ae0f3477 | 12121 | if (!old_die || !get_AT (old_die, DW_AT_inline)) |
ba7b35df | 12122 | equate_decl_number_to_die (decl, subr_die); |
71dfc51f | 12123 | |
87c8b4be CT |
12124 | if (!flag_reorder_blocks_and_partition) |
12125 | { | |
12126 | ASM_GENERATE_INTERNAL_LABEL (label_id, FUNC_BEGIN_LABEL, | |
12127 | current_function_funcdef_no); | |
12128 | add_AT_lbl_id (subr_die, DW_AT_low_pc, label_id); | |
12129 | ASM_GENERATE_INTERNAL_LABEL (label_id, FUNC_END_LABEL, | |
12130 | current_function_funcdef_no); | |
12131 | add_AT_lbl_id (subr_die, DW_AT_high_pc, label_id); | |
2878ea73 | 12132 | |
87c8b4be CT |
12133 | add_pubname (decl, subr_die); |
12134 | add_arange (decl, subr_die); | |
12135 | } | |
12136 | else | |
12137 | { /* Do nothing for now; maybe need to duplicate die, one for | |
12138 | hot section and ond for cold section, then use the hot/cold | |
12139 | section begin/end labels to generate the aranges... */ | |
12140 | /* | |
12141 | add_AT_lbl_id (subr_die, DW_AT_low_pc, hot_section_label); | |
12142 | add_AT_lbl_id (subr_die, DW_AT_high_pc, hot_section_end_label); | |
12143 | add_AT_lbl_id (subr_die, DW_AT_lo_user, unlikely_section_label); | |
12144 | add_AT_lbl_id (subr_die, DW_AT_hi_user, cold_section_end_label); | |
12145 | ||
12146 | add_pubname (decl, subr_die); | |
12147 | add_arange (decl, subr_die); | |
12148 | add_arange (decl, subr_die); | |
12149 | */ | |
12150 | } | |
d291dd49 | 12151 | |
a3f97cbb | 12152 | #ifdef MIPS_DEBUGGING_INFO |
a3f97cbb JW |
12153 | /* Add a reference to the FDE for this routine. */ |
12154 | add_AT_fde_ref (subr_die, DW_AT_MIPS_fde, current_funcdef_fde); | |
12155 | #endif | |
12156 | ||
35d177a2 AO |
12157 | cfa_fb_offset = CFA_FRAME_BASE_OFFSET (decl); |
12158 | ||
30e6f306 RH |
12159 | /* We define the "frame base" as the function's CFA. This is more |
12160 | convenient for several reasons: (1) It's stable across the prologue | |
12161 | and epilogue, which makes it better than just a frame pointer, | |
12162 | (2) With dwarf3, there exists a one-byte encoding that allows us | |
12163 | to reference the .debug_frame data by proxy, but failing that, | |
12164 | (3) We can at least reuse the code inspection and interpretation | |
12165 | code that determines the CFA position at various points in the | |
12166 | function. */ | |
12167 | /* ??? Use some command-line or configury switch to enable the use | |
12168 | of dwarf3 DW_OP_call_frame_cfa. At present there are no dwarf | |
12169 | consumers that understand it; fall back to "pure" dwarf2 and | |
12170 | convert the CFA data into a location list. */ | |
12171 | { | |
35d177a2 | 12172 | dw_loc_list_ref list = convert_cfa_to_fb_loc_list (cfa_fb_offset); |
30e6f306 RH |
12173 | if (list->dw_loc_next) |
12174 | add_AT_loc_list (subr_die, DW_AT_frame_base, list); | |
12175 | else | |
12176 | add_AT_loc (subr_die, DW_AT_frame_base, list->expr); | |
12177 | } | |
12178 | ||
12179 | /* Compute a displacement from the "steady-state frame pointer" to | |
12180 | the CFA. The former is what all stack slots and argument slots | |
2878ea73 | 12181 | will reference in the rtl; the later is what we've told the |
30e6f306 RH |
12182 | debugger about. We'll need to adjust all frame_base references |
12183 | by this displacement. */ | |
35d177a2 | 12184 | compute_frame_pointer_to_fb_displacement (cfa_fb_offset); |
a3f97cbb | 12185 | |
6de9cd9a | 12186 | if (cfun->static_chain_decl) |
ef76d03b | 12187 | add_AT_location_description (subr_die, DW_AT_static_link, |
1a186ec5 | 12188 | loc_descriptor_from_tree (cfun->static_chain_decl)); |
a3f97cbb JW |
12189 | } |
12190 | ||
12191 | /* Now output descriptions of the arguments for this function. This gets | |
556273e0 | 12192 | (unnecessarily?) complex because of the fact that the DECL_ARGUMENT list |
a3f97cbb JW |
12193 | for a FUNCTION_DECL doesn't indicate cases where there was a trailing |
12194 | `...' at the end of the formal parameter list. In order to find out if | |
12195 | there was a trailing ellipsis or not, we must instead look at the type | |
12196 | associated with the FUNCTION_DECL. This will be a node of type | |
12197 | FUNCTION_TYPE. If the chain of type nodes hanging off of this | |
556273e0 | 12198 | FUNCTION_TYPE node ends with a void_type_node then there should *not* be |
a3f97cbb | 12199 | an ellipsis at the end. */ |
71dfc51f | 12200 | |
a3f97cbb | 12201 | /* In the case where we are describing a mere function declaration, all we |
556273e0 | 12202 | need to do here (and all we *can* do here) is to describe the *types* of |
a3f97cbb | 12203 | its formal parameters. */ |
4927276d | 12204 | if (debug_info_level <= DINFO_LEVEL_TERSE) |
71dfc51f | 12205 | ; |
4edb7b60 | 12206 | else if (declaration) |
5daf7c0a | 12207 | gen_formal_types_die (decl, subr_die); |
a3f97cbb JW |
12208 | else |
12209 | { | |
f9da5064 | 12210 | /* Generate DIEs to represent all known formal parameters. */ |
b3694847 SS |
12211 | tree arg_decls = DECL_ARGUMENTS (decl); |
12212 | tree parm; | |
a3f97cbb JW |
12213 | |
12214 | /* When generating DIEs, generate the unspecified_parameters DIE | |
73c68f61 | 12215 | instead if we come across the arg "__builtin_va_alist" */ |
a3f97cbb | 12216 | for (parm = arg_decls; parm; parm = TREE_CHAIN (parm)) |
71dfc51f RK |
12217 | if (TREE_CODE (parm) == PARM_DECL) |
12218 | { | |
db3cf6fb MS |
12219 | if (DECL_NAME (parm) |
12220 | && !strcmp (IDENTIFIER_POINTER (DECL_NAME (parm)), | |
12221 | "__builtin_va_alist")) | |
71dfc51f RK |
12222 | gen_unspecified_parameters_die (parm, subr_die); |
12223 | else | |
12224 | gen_decl_die (parm, subr_die); | |
12225 | } | |
a3f97cbb | 12226 | |
4fe9b91c | 12227 | /* Decide whether we need an unspecified_parameters DIE at the end. |
73c68f61 SS |
12228 | There are 2 more cases to do this for: 1) the ansi ... declaration - |
12229 | this is detectable when the end of the arg list is not a | |
12230 | void_type_node 2) an unprototyped function declaration (not a | |
12231 | definition). This just means that we have no info about the | |
12232 | parameters at all. */ | |
a3f97cbb | 12233 | fn_arg_types = TYPE_ARG_TYPES (TREE_TYPE (decl)); |
71dfc51f | 12234 | if (fn_arg_types != NULL) |
a3f97cbb | 12235 | { |
beb235f8 | 12236 | /* This is the prototyped case, check for.... */ |
a3f97cbb | 12237 | if (TREE_VALUE (tree_last (fn_arg_types)) != void_type_node) |
71dfc51f | 12238 | gen_unspecified_parameters_die (decl, subr_die); |
a3f97cbb | 12239 | } |
71dfc51f RK |
12240 | else if (DECL_INITIAL (decl) == NULL_TREE) |
12241 | gen_unspecified_parameters_die (decl, subr_die); | |
a3f97cbb JW |
12242 | } |
12243 | ||
12244 | /* Output Dwarf info for all of the stuff within the body of the function | |
12245 | (if it has one - it may be just a declaration). */ | |
12246 | outer_scope = DECL_INITIAL (decl); | |
12247 | ||
2ad9852d RK |
12248 | /* OUTER_SCOPE is a pointer to the outermost BLOCK node created to represent |
12249 | a function. This BLOCK actually represents the outermost binding contour | |
12250 | for the function, i.e. the contour in which the function's formal | |
12251 | parameters and labels get declared. Curiously, it appears that the front | |
12252 | end doesn't actually put the PARM_DECL nodes for the current function onto | |
12253 | the BLOCK_VARS list for this outer scope, but are strung off of the | |
12254 | DECL_ARGUMENTS list for the function instead. | |
12255 | ||
12256 | The BLOCK_VARS list for the `outer_scope' does provide us with a list of | |
12257 | the LABEL_DECL nodes for the function however, and we output DWARF info | |
12258 | for those in decls_for_scope. Just within the `outer_scope' there will be | |
12259 | a BLOCK node representing the function's outermost pair of curly braces, | |
12260 | and any blocks used for the base and member initializers of a C++ | |
d7248bff | 12261 | constructor function. */ |
4edb7b60 | 12262 | if (! declaration && TREE_CODE (outer_scope) != ERROR_MARK) |
7e23cb16 | 12263 | { |
6de9cd9a DN |
12264 | /* Emit a DW_TAG_variable DIE for a named return value. */ |
12265 | if (DECL_NAME (DECL_RESULT (decl))) | |
12266 | gen_decl_die (DECL_RESULT (decl), subr_die); | |
12267 | ||
7e23cb16 JM |
12268 | current_function_has_inlines = 0; |
12269 | decls_for_scope (outer_scope, subr_die, 0); | |
71dfc51f | 12270 | |
ce61cc73 | 12271 | #if 0 && defined (MIPS_DEBUGGING_INFO) |
7e23cb16 JM |
12272 | if (current_function_has_inlines) |
12273 | { | |
12274 | add_AT_flag (subr_die, DW_AT_MIPS_has_inlines, 1); | |
12275 | if (! comp_unit_has_inlines) | |
12276 | { | |
12277 | add_AT_flag (comp_unit_die, DW_AT_MIPS_has_inlines, 1); | |
12278 | comp_unit_has_inlines = 1; | |
12279 | } | |
12280 | } | |
12281 | #endif | |
12282 | } | |
5c70192c EC |
12283 | /* Add the calling convention attribute if requested. */ |
12284 | add_calling_convention_attribute (subr_die, TREE_TYPE (decl)); | |
12285 | ||
a3f97cbb JW |
12286 | } |
12287 | ||
12288 | /* Generate a DIE to represent a declared data object. */ | |
71dfc51f | 12289 | |
a3f97cbb | 12290 | static void |
7080f735 | 12291 | gen_variable_die (tree decl, dw_die_ref context_die) |
a3f97cbb | 12292 | { |
b3694847 | 12293 | tree origin = decl_ultimate_origin (decl); |
54ba1f0d | 12294 | dw_die_ref var_die = new_die (DW_TAG_variable, context_die, decl); |
71dfc51f | 12295 | |
bdb669cb | 12296 | dw_die_ref old_die = lookup_decl_die (decl); |
9765e357 | 12297 | int declaration = (DECL_EXTERNAL (decl) |
2b402955 MM |
12298 | /* If DECL is COMDAT and has not actually been |
12299 | emitted, we cannot take its address; there | |
12300 | might end up being no definition anywhere in | |
12301 | the program. For example, consider the C++ | |
12302 | test case: | |
12303 | ||
2878ea73 MS |
12304 | template <class T> |
12305 | struct S { static const int i = 7; }; | |
2b402955 | 12306 | |
2878ea73 MS |
12307 | template <class T> |
12308 | const int S<T>::i; | |
12309 | ||
12310 | int f() { return S<int>::i; } | |
2b402955 | 12311 | |
2b402955 MM |
12312 | Here, S<int>::i is not DECL_EXTERNAL, but no |
12313 | definition is required, so the compiler will | |
2878ea73 | 12314 | not emit a definition. */ |
2b402955 MM |
12315 | || (TREE_CODE (decl) == VAR_DECL |
12316 | && DECL_COMDAT (decl) && !TREE_ASM_WRITTEN (decl)) | |
66c78aa9 | 12317 | || class_or_namespace_scope_p (context_die)); |
4edb7b60 | 12318 | |
a3f97cbb | 12319 | if (origin != NULL) |
71dfc51f | 12320 | add_abstract_origin_attribute (var_die, origin); |
2ad9852d | 12321 | |
f76b8156 | 12322 | /* Loop unrolling can create multiple blocks that refer to the same |
2ad9852d RK |
12323 | static variable, so we must test for the DW_AT_declaration flag. |
12324 | ||
12325 | ??? Loop unrolling/reorder_blocks should perhaps be rewritten to | |
f76b8156 | 12326 | copy decls and set the DECL_ABSTRACT flag on them instead of |
2ad9852d RK |
12327 | sharing them. |
12328 | ||
4424eb91 JW |
12329 | ??? Duplicated blocks have been rewritten to use .debug_ranges. |
12330 | ||
12331 | ??? The declare_in_namespace support causes us to get two DIEs for one | |
12332 | variable, both of which are declarations. We want to avoid considering | |
12333 | one to be a specification, so we must test that this DIE is not a | |
12334 | declaration. */ | |
12335 | else if (old_die && TREE_STATIC (decl) && ! declaration | |
c26fbbca | 12336 | && get_AT_flag (old_die, DW_AT_declaration) == 1) |
bdb669cb | 12337 | { |
e689ae67 | 12338 | /* This is a definition of a C++ class level static. */ |
47fcfa7b | 12339 | add_AT_specification (var_die, old_die); |
bdb669cb JM |
12340 | if (DECL_NAME (decl)) |
12341 | { | |
6773e15f | 12342 | expanded_location s = expand_location (DECL_SOURCE_LOCATION (decl)); |
d5688810 | 12343 | struct dwarf_file_data * file_index = lookup_filename (s.file); |
71dfc51f | 12344 | |
d5688810 GK |
12345 | if (get_AT_file (old_die, DW_AT_decl_file) != file_index) |
12346 | add_AT_file (var_die, DW_AT_decl_file, file_index); | |
71dfc51f | 12347 | |
d5688810 | 12348 | if (get_AT_unsigned (old_die, DW_AT_decl_line) != (unsigned) s.line) |
6773e15f | 12349 | add_AT_unsigned (var_die, DW_AT_decl_line, s.line); |
bdb669cb JM |
12350 | } |
12351 | } | |
a3f97cbb JW |
12352 | else |
12353 | { | |
12354 | add_name_and_src_coords_attributes (var_die, decl); | |
2ad9852d | 12355 | add_type_attribute (var_die, TREE_TYPE (decl), TREE_READONLY (decl), |
a3f97cbb | 12356 | TREE_THIS_VOLATILE (decl), context_die); |
71dfc51f | 12357 | |
273dbe67 JM |
12358 | if (TREE_PUBLIC (decl)) |
12359 | add_AT_flag (var_die, DW_AT_external, 1); | |
71dfc51f | 12360 | |
273dbe67 JM |
12361 | if (DECL_ARTIFICIAL (decl)) |
12362 | add_AT_flag (var_die, DW_AT_artificial, 1); | |
71dfc51f | 12363 | |
a94dbf2c JM |
12364 | if (TREE_PROTECTED (decl)) |
12365 | add_AT_unsigned (var_die, DW_AT_accessibility, DW_ACCESS_protected); | |
12366 | else if (TREE_PRIVATE (decl)) | |
12367 | add_AT_unsigned (var_die, DW_AT_accessibility, DW_ACCESS_private); | |
a3f97cbb | 12368 | } |
4edb7b60 JM |
12369 | |
12370 | if (declaration) | |
12371 | add_AT_flag (var_die, DW_AT_declaration, 1); | |
556273e0 | 12372 | |
6097b0c3 | 12373 | if (DECL_ABSTRACT (decl) || declaration) |
4edb7b60 JM |
12374 | equate_decl_number_to_die (decl, var_die); |
12375 | ||
12376 | if (! declaration && ! DECL_ABSTRACT (decl)) | |
a3f97cbb | 12377 | { |
0a2d3d69 | 12378 | add_location_or_const_value_attribute (var_die, decl, DW_AT_location); |
d291dd49 | 12379 | add_pubname (decl, var_die); |
a3f97cbb | 12380 | } |
1bfb5f8f JM |
12381 | else |
12382 | tree_add_const_value_attribute (var_die, decl); | |
a3f97cbb JW |
12383 | } |
12384 | ||
12385 | /* Generate a DIE to represent a label identifier. */ | |
71dfc51f | 12386 | |
a3f97cbb | 12387 | static void |
7080f735 | 12388 | gen_label_die (tree decl, dw_die_ref context_die) |
a3f97cbb | 12389 | { |
b3694847 | 12390 | tree origin = decl_ultimate_origin (decl); |
54ba1f0d | 12391 | dw_die_ref lbl_die = new_die (DW_TAG_label, context_die, decl); |
b3694847 | 12392 | rtx insn; |
a3f97cbb | 12393 | char label[MAX_ARTIFICIAL_LABEL_BYTES]; |
71dfc51f | 12394 | |
a3f97cbb | 12395 | if (origin != NULL) |
71dfc51f | 12396 | add_abstract_origin_attribute (lbl_die, origin); |
a3f97cbb | 12397 | else |
71dfc51f RK |
12398 | add_name_and_src_coords_attributes (lbl_die, decl); |
12399 | ||
a3f97cbb | 12400 | if (DECL_ABSTRACT (decl)) |
71dfc51f | 12401 | equate_decl_number_to_die (decl, lbl_die); |
a3f97cbb JW |
12402 | else |
12403 | { | |
d0585b99 | 12404 | insn = DECL_RTL_IF_SET (decl); |
088e7160 NC |
12405 | |
12406 | /* Deleted labels are programmer specified labels which have been | |
6356f892 | 12407 | eliminated because of various optimizations. We still emit them |
088e7160 | 12408 | here so that it is possible to put breakpoints on them. */ |
d0585b99 | 12409 | if (insn |
4b4bf941 JQ |
12410 | && (LABEL_P (insn) |
12411 | || ((NOTE_P (insn) | |
a38e7aa5 | 12412 | && NOTE_KIND (insn) == NOTE_INSN_DELETED_LABEL)))) |
a3f97cbb | 12413 | { |
556273e0 KH |
12414 | /* When optimization is enabled (via -O) some parts of the compiler |
12415 | (e.g. jump.c and cse.c) may try to delete CODE_LABEL insns which | |
a3f97cbb JW |
12416 | represent source-level labels which were explicitly declared by |
12417 | the user. This really shouldn't be happening though, so catch | |
12418 | it if it ever does happen. */ | |
ced3f397 | 12419 | gcc_assert (!INSN_DELETED_P (insn)); |
71dfc51f | 12420 | |
66234570 | 12421 | ASM_GENERATE_INTERNAL_LABEL (label, "L", CODE_LABEL_NUMBER (insn)); |
a3f97cbb JW |
12422 | add_AT_lbl_id (lbl_die, DW_AT_low_pc, label); |
12423 | } | |
12424 | } | |
12425 | } | |
12426 | ||
3e2844cb JW |
12427 | /* A helper function for gen_inlined_subroutine_die. Add source coordinate |
12428 | attributes to the DIE for a block STMT, to describe where the inlined | |
12429 | function was called from. This is similar to add_src_coords_attributes. */ | |
12430 | ||
12431 | static inline void | |
12432 | add_call_src_coords_attributes (tree stmt, dw_die_ref die) | |
12433 | { | |
12434 | expanded_location s = expand_location (BLOCK_SOURCE_LOCATION (stmt)); | |
3e2844cb | 12435 | |
d5688810 | 12436 | add_AT_file (die, DW_AT_call_file, lookup_filename (s.file)); |
3e2844cb JW |
12437 | add_AT_unsigned (die, DW_AT_call_line, s.line); |
12438 | } | |
12439 | ||
dfad806e AO |
12440 | |
12441 | /* If STMT's abstract origin is a function declaration and STMT's | |
12442 | first subblock's abstract origin is the function's outermost block, | |
12443 | then we're looking at the main entry point. */ | |
12444 | static bool | |
12445 | is_inlined_entry_point (tree stmt) | |
12446 | { | |
12447 | tree decl, block; | |
12448 | ||
12449 | if (!stmt || TREE_CODE (stmt) != BLOCK) | |
12450 | return false; | |
12451 | ||
12452 | decl = block_ultimate_origin (stmt); | |
12453 | ||
12454 | if (!decl || TREE_CODE (decl) != FUNCTION_DECL) | |
12455 | return false; | |
12456 | ||
12457 | block = BLOCK_SUBBLOCKS (stmt); | |
12458 | ||
12459 | if (block) | |
12460 | { | |
12461 | if (TREE_CODE (block) != BLOCK) | |
12462 | return false; | |
12463 | ||
12464 | block = block_ultimate_origin (block); | |
12465 | } | |
12466 | ||
12467 | return block == DECL_INITIAL (decl); | |
12468 | } | |
12469 | ||
fdfa76bd JW |
12470 | /* A helper function for gen_lexical_block_die and gen_inlined_subroutine_die. |
12471 | Add low_pc and high_pc attributes to the DIE for a block STMT. */ | |
71dfc51f | 12472 | |
fdfa76bd JW |
12473 | static inline void |
12474 | add_high_low_attributes (tree stmt, dw_die_ref die) | |
a3f97cbb | 12475 | { |
a3f97cbb | 12476 | char label[MAX_ARTIFICIAL_LABEL_BYTES]; |
71dfc51f | 12477 | |
fdfa76bd | 12478 | if (BLOCK_FRAGMENT_CHAIN (stmt)) |
a3f97cbb | 12479 | { |
fdfa76bd | 12480 | tree chain; |
a20612aa | 12481 | |
dfad806e AO |
12482 | if (is_inlined_entry_point (stmt)) |
12483 | { | |
12484 | ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_BEGIN_LABEL, | |
12485 | BLOCK_NUMBER (stmt)); | |
12486 | add_AT_lbl_id (die, DW_AT_entry_pc, label); | |
12487 | } | |
12488 | ||
fdfa76bd | 12489 | add_AT_range_list (die, DW_AT_ranges, add_ranges (stmt)); |
a20612aa | 12490 | |
fdfa76bd JW |
12491 | chain = BLOCK_FRAGMENT_CHAIN (stmt); |
12492 | do | |
a20612aa | 12493 | { |
fdfa76bd JW |
12494 | add_ranges (chain); |
12495 | chain = BLOCK_FRAGMENT_CHAIN (chain); | |
a20612aa | 12496 | } |
fdfa76bd JW |
12497 | while (chain); |
12498 | add_ranges (NULL); | |
12499 | } | |
12500 | else | |
12501 | { | |
12502 | ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_BEGIN_LABEL, | |
12503 | BLOCK_NUMBER (stmt)); | |
12504 | add_AT_lbl_id (die, DW_AT_low_pc, label); | |
12505 | ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_END_LABEL, | |
12506 | BLOCK_NUMBER (stmt)); | |
12507 | add_AT_lbl_id (die, DW_AT_high_pc, label); | |
a3f97cbb | 12508 | } |
fdfa76bd JW |
12509 | } |
12510 | ||
12511 | /* Generate a DIE for a lexical block. */ | |
12512 | ||
12513 | static void | |
12514 | gen_lexical_block_die (tree stmt, dw_die_ref context_die, int depth) | |
12515 | { | |
12516 | dw_die_ref stmt_die = new_die (DW_TAG_lexical_block, context_die, stmt); | |
12517 | ||
12518 | if (! BLOCK_ABSTRACT (stmt)) | |
12519 | add_high_low_attributes (stmt, stmt_die); | |
71dfc51f | 12520 | |
d7248bff | 12521 | decls_for_scope (stmt, stmt_die, depth); |
a3f97cbb JW |
12522 | } |
12523 | ||
12524 | /* Generate a DIE for an inlined subprogram. */ | |
71dfc51f | 12525 | |
a3f97cbb | 12526 | static void |
7080f735 | 12527 | gen_inlined_subroutine_die (tree stmt, dw_die_ref context_die, int depth) |
a3f97cbb | 12528 | { |
9bdca184 AO |
12529 | tree decl = block_ultimate_origin (stmt); |
12530 | ||
12531 | /* Emit info for the abstract instance first, if we haven't yet. We | |
12532 | must emit this even if the block is abstract, otherwise when we | |
12533 | emit the block below (or elsewhere), we may end up trying to emit | |
12534 | a die whose origin die hasn't been emitted, and crashing. */ | |
12535 | dwarf2out_abstract_function (decl); | |
12536 | ||
71dfc51f | 12537 | if (! BLOCK_ABSTRACT (stmt)) |
a3f97cbb | 12538 | { |
b3694847 | 12539 | dw_die_ref subr_die |
54ba1f0d | 12540 | = new_die (DW_TAG_inlined_subroutine, context_die, stmt); |
71dfc51f | 12541 | |
ab72d377 | 12542 | add_abstract_origin_attribute (subr_die, decl); |
fdfa76bd | 12543 | add_high_low_attributes (stmt, subr_die); |
3e2844cb | 12544 | add_call_src_coords_attributes (stmt, subr_die); |
fdfa76bd | 12545 | |
d7248bff | 12546 | decls_for_scope (stmt, subr_die, depth); |
7e23cb16 | 12547 | current_function_has_inlines = 1; |
a3f97cbb | 12548 | } |
06e224f7 AO |
12549 | else |
12550 | /* We may get here if we're the outer block of function A that was | |
12551 | inlined into function B that was inlined into function C. When | |
12552 | generating debugging info for C, dwarf2out_abstract_function(B) | |
12553 | would mark all inlined blocks as abstract, including this one. | |
12554 | So, we wouldn't (and shouldn't) expect labels to be generated | |
12555 | for this one. Instead, just emit debugging info for | |
12556 | declarations within the block. This is particularly important | |
12557 | in the case of initializers of arguments passed from B to us: | |
12558 | if they're statement expressions containing declarations, we | |
12559 | wouldn't generate dies for their abstract variables, and then, | |
12560 | when generating dies for the real variables, we'd die (pun | |
12561 | intended :-) */ | |
12562 | gen_lexical_block_die (stmt, context_die, depth); | |
a3f97cbb JW |
12563 | } |
12564 | ||
12565 | /* Generate a DIE for a field in a record, or structure. */ | |
71dfc51f | 12566 | |
a3f97cbb | 12567 | static void |
7080f735 | 12568 | gen_field_die (tree decl, dw_die_ref context_die) |
a3f97cbb | 12569 | { |
a53efda2 | 12570 | dw_die_ref decl_die; |
71dfc51f | 12571 | |
a53efda2 JZ |
12572 | if (TREE_TYPE (decl) == error_mark_node) |
12573 | return; | |
7080f735 | 12574 | |
a53efda2 | 12575 | decl_die = new_die (DW_TAG_member, context_die, decl); |
a3f97cbb | 12576 | add_name_and_src_coords_attributes (decl_die, decl); |
a3f97cbb JW |
12577 | add_type_attribute (decl_die, member_declared_type (decl), |
12578 | TREE_READONLY (decl), TREE_THIS_VOLATILE (decl), | |
12579 | context_die); | |
71dfc51f | 12580 | |
a3f97cbb JW |
12581 | if (DECL_BIT_FIELD_TYPE (decl)) |
12582 | { | |
12583 | add_byte_size_attribute (decl_die, decl); | |
12584 | add_bit_size_attribute (decl_die, decl); | |
12585 | add_bit_offset_attribute (decl_die, decl); | |
12586 | } | |
71dfc51f | 12587 | |
a94dbf2c JM |
12588 | if (TREE_CODE (DECL_FIELD_CONTEXT (decl)) != UNION_TYPE) |
12589 | add_data_member_location_attribute (decl_die, decl); | |
71dfc51f | 12590 | |
273dbe67 JM |
12591 | if (DECL_ARTIFICIAL (decl)) |
12592 | add_AT_flag (decl_die, DW_AT_artificial, 1); | |
71dfc51f | 12593 | |
a94dbf2c JM |
12594 | if (TREE_PROTECTED (decl)) |
12595 | add_AT_unsigned (decl_die, DW_AT_accessibility, DW_ACCESS_protected); | |
12596 | else if (TREE_PRIVATE (decl)) | |
12597 | add_AT_unsigned (decl_die, DW_AT_accessibility, DW_ACCESS_private); | |
90300b8c DP |
12598 | |
12599 | /* Equate decl number to die, so that we can look up this decl later on. */ | |
12600 | equate_decl_number_to_die (decl, decl_die); | |
a3f97cbb JW |
12601 | } |
12602 | ||
ab72d377 JM |
12603 | #if 0 |
12604 | /* Don't generate either pointer_type DIEs or reference_type DIEs here. | |
12605 | Use modified_type_die instead. | |
a3f97cbb JW |
12606 | We keep this code here just in case these types of DIEs may be needed to |
12607 | represent certain things in other languages (e.g. Pascal) someday. */ | |
2ad9852d | 12608 | |
a3f97cbb | 12609 | static void |
7080f735 | 12610 | gen_pointer_type_die (tree type, dw_die_ref context_die) |
a3f97cbb | 12611 | { |
b3694847 | 12612 | dw_die_ref ptr_die |
54ba1f0d | 12613 | = new_die (DW_TAG_pointer_type, scope_die_for (type, context_die), type); |
71dfc51f | 12614 | |
a3f97cbb | 12615 | equate_type_number_to_die (type, ptr_die); |
a3f97cbb | 12616 | add_type_attribute (ptr_die, TREE_TYPE (type), 0, 0, context_die); |
ab72d377 | 12617 | add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE); |
a3f97cbb JW |
12618 | } |
12619 | ||
ab72d377 JM |
12620 | /* Don't generate either pointer_type DIEs or reference_type DIEs here. |
12621 | Use modified_type_die instead. | |
a3f97cbb JW |
12622 | We keep this code here just in case these types of DIEs may be needed to |
12623 | represent certain things in other languages (e.g. Pascal) someday. */ | |
2ad9852d | 12624 | |
a3f97cbb | 12625 | static void |
7080f735 | 12626 | gen_reference_type_die (tree type, dw_die_ref context_die) |
a3f97cbb | 12627 | { |
b3694847 | 12628 | dw_die_ref ref_die |
54ba1f0d | 12629 | = new_die (DW_TAG_reference_type, scope_die_for (type, context_die), type); |
71dfc51f | 12630 | |
a3f97cbb | 12631 | equate_type_number_to_die (type, ref_die); |
a3f97cbb | 12632 | add_type_attribute (ref_die, TREE_TYPE (type), 0, 0, context_die); |
ab72d377 | 12633 | add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE); |
a3f97cbb | 12634 | } |
ab72d377 | 12635 | #endif |
a3f97cbb JW |
12636 | |
12637 | /* Generate a DIE for a pointer to a member type. */ | |
2ad9852d | 12638 | |
a3f97cbb | 12639 | static void |
7080f735 | 12640 | gen_ptr_to_mbr_type_die (tree type, dw_die_ref context_die) |
a3f97cbb | 12641 | { |
b3694847 | 12642 | dw_die_ref ptr_die |
54ba1f0d RH |
12643 | = new_die (DW_TAG_ptr_to_member_type, |
12644 | scope_die_for (type, context_die), type); | |
71dfc51f | 12645 | |
a3f97cbb | 12646 | equate_type_number_to_die (type, ptr_die); |
a3f97cbb | 12647 | add_AT_die_ref (ptr_die, DW_AT_containing_type, |
bdb669cb | 12648 | lookup_type_die (TYPE_OFFSET_BASETYPE (type))); |
a3f97cbb JW |
12649 | add_type_attribute (ptr_die, TREE_TYPE (type), 0, 0, context_die); |
12650 | } | |
12651 | ||
12652 | /* Generate the DIE for the compilation unit. */ | |
71dfc51f | 12653 | |
a96c67ec | 12654 | static dw_die_ref |
7080f735 | 12655 | gen_compile_unit_die (const char *filename) |
a3f97cbb | 12656 | { |
b3694847 | 12657 | dw_die_ref die; |
a3f97cbb | 12658 | char producer[250]; |
3ac88239 | 12659 | const char *language_string = lang_hooks.name; |
a96c67ec | 12660 | int language; |
a3f97cbb | 12661 | |
54ba1f0d | 12662 | die = new_die (DW_TAG_compile_unit, NULL, NULL); |
bdb669cb | 12663 | |
c4274b22 RH |
12664 | if (filename) |
12665 | { | |
12666 | add_name_attribute (die, filename); | |
e3091a5f | 12667 | /* Don't add cwd for <built-in>. */ |
1d2c2b96 | 12668 | if (!IS_ABSOLUTE_PATH (filename) && filename[0] != '<') |
c4274b22 RH |
12669 | add_comp_dir_attribute (die); |
12670 | } | |
a3f97cbb JW |
12671 | |
12672 | sprintf (producer, "%s %s", language_string, version_string); | |
12673 | ||
12674 | #ifdef MIPS_DEBUGGING_INFO | |
12675 | /* The MIPS/SGI compilers place the 'cc' command line options in the producer | |
12676 | string. The SGI debugger looks for -g, -g1, -g2, or -g3; if they do | |
12677 | not appear in the producer string, the debugger reaches the conclusion | |
12678 | that the object file is stripped and has no debugging information. | |
12679 | To get the MIPS/SGI debugger to believe that there is debugging | |
12680 | information in the object file, we add a -g to the producer string. */ | |
4927276d JM |
12681 | if (debug_info_level > DINFO_LEVEL_TERSE) |
12682 | strcat (producer, " -g"); | |
a3f97cbb JW |
12683 | #endif |
12684 | ||
a96c67ec | 12685 | add_AT_string (die, DW_AT_producer, producer); |
a9d38797 | 12686 | |
a3f97cbb | 12687 | if (strcmp (language_string, "GNU C++") == 0) |
a96c67ec | 12688 | language = DW_LANG_C_plus_plus; |
a3f97cbb | 12689 | else if (strcmp (language_string, "GNU Ada") == 0) |
8cb5fbbf | 12690 | language = DW_LANG_Ada95; |
a9d38797 | 12691 | else if (strcmp (language_string, "GNU F77") == 0) |
a96c67ec | 12692 | language = DW_LANG_Fortran77; |
6de9cd9a DN |
12693 | else if (strcmp (language_string, "GNU F95") == 0) |
12694 | language = DW_LANG_Fortran95; | |
bc28c45b | 12695 | else if (strcmp (language_string, "GNU Pascal") == 0) |
a96c67ec | 12696 | language = DW_LANG_Pascal83; |
28985b81 AG |
12697 | else if (strcmp (language_string, "GNU Java") == 0) |
12698 | language = DW_LANG_Java; | |
9e51ddaa GK |
12699 | else if (strcmp (language_string, "GNU Objective-C") == 0) |
12700 | language = DW_LANG_ObjC; | |
12701 | else if (strcmp (language_string, "GNU Objective-C++") == 0) | |
12702 | language = DW_LANG_ObjC_plus_plus; | |
a3f97cbb | 12703 | else |
a96c67ec | 12704 | language = DW_LANG_C89; |
a9d38797 | 12705 | |
a96c67ec | 12706 | add_AT_unsigned (die, DW_AT_language, language); |
a96c67ec | 12707 | return die; |
a3f97cbb JW |
12708 | } |
12709 | ||
61b32c02 | 12710 | /* Generate the DIE for a base class. */ |
71dfc51f | 12711 | |
61b32c02 | 12712 | static void |
7080f735 | 12713 | gen_inheritance_die (tree binfo, tree access, dw_die_ref context_die) |
61b32c02 | 12714 | { |
54ba1f0d | 12715 | dw_die_ref die = new_die (DW_TAG_inheritance, context_die, binfo); |
71dfc51f | 12716 | |
61b32c02 JM |
12717 | add_type_attribute (die, BINFO_TYPE (binfo), 0, 0, context_die); |
12718 | add_data_member_location_attribute (die, binfo); | |
71dfc51f | 12719 | |
809e3e7f | 12720 | if (BINFO_VIRTUAL_P (binfo)) |
61b32c02 | 12721 | add_AT_unsigned (die, DW_AT_virtuality, DW_VIRTUALITY_virtual); |
2ad9852d | 12722 | |
dbbf88d1 | 12723 | if (access == access_public_node) |
61b32c02 | 12724 | add_AT_unsigned (die, DW_AT_accessibility, DW_ACCESS_public); |
dbbf88d1 | 12725 | else if (access == access_protected_node) |
61b32c02 JM |
12726 | add_AT_unsigned (die, DW_AT_accessibility, DW_ACCESS_protected); |
12727 | } | |
12728 | ||
956d6950 | 12729 | /* Generate a DIE for a class member. */ |
71dfc51f | 12730 | |
a3f97cbb | 12731 | static void |
7080f735 | 12732 | gen_member_die (tree type, dw_die_ref context_die) |
a3f97cbb | 12733 | { |
b3694847 | 12734 | tree member; |
dbbf88d1 | 12735 | tree binfo = TYPE_BINFO (type); |
10a11b75 | 12736 | dw_die_ref child; |
71dfc51f | 12737 | |
a3f97cbb JW |
12738 | /* If this is not an incomplete type, output descriptions of each of its |
12739 | members. Note that as we output the DIEs necessary to represent the | |
12740 | members of this record or union type, we will also be trying to output | |
12741 | DIEs to represent the *types* of those members. However the `type' | |
556273e0 | 12742 | function (above) will specifically avoid generating type DIEs for member |
eaec9b3d | 12743 | types *within* the list of member DIEs for this (containing) type except |
a3f97cbb JW |
12744 | for those types (of members) which are explicitly marked as also being |
12745 | members of this (containing) type themselves. The g++ front- end can | |
2ad9852d RK |
12746 | force any given type to be treated as a member of some other (containing) |
12747 | type by setting the TYPE_CONTEXT of the given (member) type to point to | |
12748 | the TREE node representing the appropriate (containing) type. */ | |
a3f97cbb | 12749 | |
61b32c02 | 12750 | /* First output info about the base classes. */ |
fa743e8c | 12751 | if (binfo) |
a3f97cbb | 12752 | { |
d4e6fecb | 12753 | VEC(tree,gc) *accesses = BINFO_BASE_ACCESSES (binfo); |
b3694847 | 12754 | int i; |
fa743e8c | 12755 | tree base; |
61b32c02 | 12756 | |
fa743e8c NS |
12757 | for (i = 0; BINFO_BASE_ITERATE (binfo, i, base); i++) |
12758 | gen_inheritance_die (base, | |
63d1c7b3 | 12759 | (accesses ? VEC_index (tree, accesses, i) |
dbbf88d1 | 12760 | : access_public_node), context_die); |
a3f97cbb JW |
12761 | } |
12762 | ||
61b32c02 JM |
12763 | /* Now output info about the data members and type members. */ |
12764 | for (member = TYPE_FIELDS (type); member; member = TREE_CHAIN (member)) | |
10a11b75 JM |
12765 | { |
12766 | /* If we thought we were generating minimal debug info for TYPE | |
12767 | and then changed our minds, some of the member declarations | |
12768 | may have already been defined. Don't define them again, but | |
12769 | do put them in the right order. */ | |
12770 | ||
12771 | child = lookup_decl_die (member); | |
12772 | if (child) | |
12773 | splice_child_die (context_die, child); | |
12774 | else | |
12775 | gen_decl_die (member, context_die); | |
12776 | } | |
61b32c02 | 12777 | |
a3f97cbb | 12778 | /* Now output info about the function members (if any). */ |
61b32c02 | 12779 | for (member = TYPE_METHODS (type); member; member = TREE_CHAIN (member)) |
10a11b75 | 12780 | { |
5daf7c0a JM |
12781 | /* Don't include clones in the member list. */ |
12782 | if (DECL_ABSTRACT_ORIGIN (member)) | |
12783 | continue; | |
12784 | ||
10a11b75 JM |
12785 | child = lookup_decl_die (member); |
12786 | if (child) | |
12787 | splice_child_die (context_die, child); | |
12788 | else | |
12789 | gen_decl_die (member, context_die); | |
12790 | } | |
a3f97cbb JW |
12791 | } |
12792 | ||
10a11b75 JM |
12793 | /* Generate a DIE for a structure or union type. If TYPE_DECL_SUPPRESS_DEBUG |
12794 | is set, we pretend that the type was never defined, so we only get the | |
12795 | member DIEs needed by later specification DIEs. */ | |
71dfc51f | 12796 | |
a3f97cbb | 12797 | static void |
39ef6592 LC |
12798 | gen_struct_or_union_type_die (tree type, dw_die_ref context_die, |
12799 | enum debug_info_usage usage) | |
a3f97cbb | 12800 | { |
b3694847 SS |
12801 | dw_die_ref type_die = lookup_type_die (type); |
12802 | dw_die_ref scope_die = 0; | |
12803 | int nested = 0; | |
10a11b75 | 12804 | int complete = (TYPE_SIZE (type) |
65e1263a JW |
12805 | && (! TYPE_STUB_DECL (type) |
12806 | || ! TYPE_DECL_SUPPRESS_DEBUG (TYPE_STUB_DECL (type)))); | |
66c78aa9 | 12807 | int ns_decl = (context_die && context_die->die_tag == DW_TAG_namespace); |
39ef6592 | 12808 | complete = complete && should_emit_struct_debug (type, usage); |
273dbe67 | 12809 | |
10a11b75 | 12810 | if (type_die && ! complete) |
273dbe67 | 12811 | return; |
a082c85a | 12812 | |
71dfc51f | 12813 | if (TYPE_CONTEXT (type) != NULL_TREE |
66c78aa9 JM |
12814 | && (AGGREGATE_TYPE_P (TYPE_CONTEXT (type)) |
12815 | || TREE_CODE (TYPE_CONTEXT (type)) == NAMESPACE_DECL)) | |
a082c85a JM |
12816 | nested = 1; |
12817 | ||
a94dbf2c | 12818 | scope_die = scope_die_for (type, context_die); |
a082c85a JM |
12819 | |
12820 | if (! type_die || (nested && scope_die == comp_unit_die)) | |
273dbe67 | 12821 | /* First occurrence of type or toplevel definition of nested class. */ |
a3f97cbb | 12822 | { |
b3694847 | 12823 | dw_die_ref old_die = type_die; |
71dfc51f | 12824 | |
a3f97cbb JW |
12825 | type_die = new_die (TREE_CODE (type) == RECORD_TYPE |
12826 | ? DW_TAG_structure_type : DW_TAG_union_type, | |
54ba1f0d | 12827 | scope_die, type); |
a3f97cbb | 12828 | equate_type_number_to_die (type, type_die); |
273dbe67 | 12829 | if (old_die) |
47fcfa7b | 12830 | add_AT_specification (type_die, old_die); |
5de0e8d4 JM |
12831 | else |
12832 | add_name_attribute (type_die, type_tag (type)); | |
a3f97cbb | 12833 | } |
4b674448 | 12834 | else |
273dbe67 | 12835 | remove_AT (type_die, DW_AT_declaration); |
a3f97cbb JW |
12836 | |
12837 | /* If this type has been completed, then give it a byte_size attribute and | |
12838 | then give a list of members. */ | |
66c78aa9 | 12839 | if (complete && !ns_decl) |
a3f97cbb | 12840 | { |
556273e0 | 12841 | /* Prevent infinite recursion in cases where the type of some member of |
73c68f61 | 12842 | this type is expressed in terms of this type itself. */ |
a3f97cbb | 12843 | TREE_ASM_WRITTEN (type) = 1; |
273dbe67 | 12844 | add_byte_size_attribute (type_die, type); |
e9a25f70 | 12845 | if (TYPE_STUB_DECL (type) != NULL_TREE) |
b2932ae5 | 12846 | add_src_coords_attributes (type_die, TYPE_STUB_DECL (type)); |
71dfc51f | 12847 | |
ef76d03b JW |
12848 | /* If the first reference to this type was as the return type of an |
12849 | inline function, then it may not have a parent. Fix this now. */ | |
12850 | if (type_die->die_parent == NULL) | |
12851 | add_child_die (scope_die, type_die); | |
12852 | ||
273dbe67 JM |
12853 | push_decl_scope (type); |
12854 | gen_member_die (type, type_die); | |
12855 | pop_decl_scope (); | |
71dfc51f | 12856 | |
a94dbf2c JM |
12857 | /* GNU extension: Record what type our vtable lives in. */ |
12858 | if (TYPE_VFIELD (type)) | |
12859 | { | |
12860 | tree vtype = DECL_FCONTEXT (TYPE_VFIELD (type)); | |
71dfc51f | 12861 | |
de6e505e JM |
12862 | gen_type_die (vtype, context_die); |
12863 | add_AT_die_ref (type_die, DW_AT_containing_type, | |
12864 | lookup_type_die (vtype)); | |
a94dbf2c | 12865 | } |
a3f97cbb | 12866 | } |
4b674448 | 12867 | else |
8a8c3656 JM |
12868 | { |
12869 | add_AT_flag (type_die, DW_AT_declaration, 1); | |
a30d4514 | 12870 | |
9765e357 | 12871 | /* We don't need to do this for function-local types. */ |
9702143f RK |
12872 | if (TYPE_STUB_DECL (type) |
12873 | && ! decl_function_context (TYPE_STUB_DECL (type))) | |
887fb69b | 12874 | VEC_safe_push (tree, gc, incomplete_types, type); |
8a8c3656 | 12875 | } |
89708594 CT |
12876 | |
12877 | if (get_AT (type_die, DW_AT_name)) | |
12878 | add_pubtype (type, type_die); | |
a3f97cbb JW |
12879 | } |
12880 | ||
12881 | /* Generate a DIE for a subroutine _type_. */ | |
71dfc51f | 12882 | |
a3f97cbb | 12883 | static void |
7080f735 | 12884 | gen_subroutine_type_die (tree type, dw_die_ref context_die) |
a3f97cbb | 12885 | { |
b3694847 SS |
12886 | tree return_type = TREE_TYPE (type); |
12887 | dw_die_ref subr_die | |
54ba1f0d RH |
12888 | = new_die (DW_TAG_subroutine_type, |
12889 | scope_die_for (type, context_die), type); | |
71dfc51f | 12890 | |
a3f97cbb JW |
12891 | equate_type_number_to_die (type, subr_die); |
12892 | add_prototyped_attribute (subr_die, type); | |
a3f97cbb | 12893 | add_type_attribute (subr_die, return_type, 0, 0, context_die); |
a94dbf2c | 12894 | gen_formal_types_die (type, subr_die); |
89708594 CT |
12895 | |
12896 | if (get_AT (subr_die, DW_AT_name)) | |
12897 | add_pubtype (type, subr_die); | |
a3f97cbb JW |
12898 | } |
12899 | ||
f9da5064 | 12900 | /* Generate a DIE for a type definition. */ |
71dfc51f | 12901 | |
a3f97cbb | 12902 | static void |
7080f735 | 12903 | gen_typedef_die (tree decl, dw_die_ref context_die) |
a3f97cbb | 12904 | { |
b3694847 SS |
12905 | dw_die_ref type_die; |
12906 | tree origin; | |
a94dbf2c JM |
12907 | |
12908 | if (TREE_ASM_WRITTEN (decl)) | |
12909 | return; | |
a94dbf2c | 12910 | |
2ad9852d | 12911 | TREE_ASM_WRITTEN (decl) = 1; |
54ba1f0d | 12912 | type_die = new_die (DW_TAG_typedef, context_die, decl); |
a94dbf2c | 12913 | origin = decl_ultimate_origin (decl); |
a3f97cbb | 12914 | if (origin != NULL) |
a94dbf2c | 12915 | add_abstract_origin_attribute (type_die, origin); |
a3f97cbb JW |
12916 | else |
12917 | { | |
b3694847 | 12918 | tree type; |
2ad9852d | 12919 | |
a3f97cbb | 12920 | add_name_and_src_coords_attributes (type_die, decl); |
a94dbf2c JM |
12921 | if (DECL_ORIGINAL_TYPE (decl)) |
12922 | { | |
12923 | type = DECL_ORIGINAL_TYPE (decl); | |
62e3bf54 | 12924 | |
ced3f397 NS |
12925 | gcc_assert (type != TREE_TYPE (decl)); |
12926 | equate_type_number_to_die (TREE_TYPE (decl), type_die); | |
a94dbf2c JM |
12927 | } |
12928 | else | |
12929 | type = TREE_TYPE (decl); | |
2ad9852d | 12930 | |
a94dbf2c JM |
12931 | add_type_attribute (type_die, type, TREE_READONLY (decl), |
12932 | TREE_THIS_VOLATILE (decl), context_die); | |
a3f97cbb | 12933 | } |
71dfc51f | 12934 | |
a3f97cbb | 12935 | if (DECL_ABSTRACT (decl)) |
a94dbf2c | 12936 | equate_decl_number_to_die (decl, type_die); |
89708594 CT |
12937 | |
12938 | if (get_AT (type_die, DW_AT_name)) | |
12939 | add_pubtype (decl, type_die); | |
a3f97cbb JW |
12940 | } |
12941 | ||
12942 | /* Generate a type description DIE. */ | |
71dfc51f | 12943 | |
a3f97cbb | 12944 | static void |
39ef6592 LC |
12945 | gen_type_die_with_usage (tree type, dw_die_ref context_die, |
12946 | enum debug_info_usage usage) | |
a3f97cbb | 12947 | { |
348bb3c7 JM |
12948 | int need_pop; |
12949 | ||
71dfc51f RK |
12950 | if (type == NULL_TREE || type == error_mark_node) |
12951 | return; | |
a3f97cbb | 12952 | |
a94dbf2c JM |
12953 | if (TYPE_NAME (type) && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL |
12954 | && DECL_ORIGINAL_TYPE (TYPE_NAME (type))) | |
556273e0 | 12955 | { |
5d7bed9d DJ |
12956 | if (TREE_ASM_WRITTEN (type)) |
12957 | return; | |
12958 | ||
29b91443 | 12959 | /* Prevent broken recursion; we can't hand off to the same type. */ |
ced3f397 | 12960 | gcc_assert (DECL_ORIGINAL_TYPE (TYPE_NAME (type)) != type); |
29b91443 | 12961 | |
a94dbf2c JM |
12962 | TREE_ASM_WRITTEN (type) = 1; |
12963 | gen_decl_die (TYPE_NAME (type), context_die); | |
12964 | return; | |
12965 | } | |
12966 | ||
5d7bed9d DJ |
12967 | /* We are going to output a DIE to represent the unqualified version |
12968 | of this type (i.e. without any const or volatile qualifiers) so | |
12969 | get the main variant (i.e. the unqualified version) of this type | |
12970 | now. (Vectors are special because the debugging info is in the | |
12971 | cloned type itself). */ | |
12972 | if (TREE_CODE (type) != VECTOR_TYPE) | |
12973 | type = type_main_variant (type); | |
12974 | ||
12975 | if (TREE_ASM_WRITTEN (type)) | |
12976 | return; | |
12977 | ||
a3f97cbb JW |
12978 | switch (TREE_CODE (type)) |
12979 | { | |
12980 | case ERROR_MARK: | |
12981 | break; | |
12982 | ||
12983 | case POINTER_TYPE: | |
12984 | case REFERENCE_TYPE: | |
956d6950 JL |
12985 | /* We must set TREE_ASM_WRITTEN in case this is a recursive type. This |
12986 | ensures that the gen_type_die recursion will terminate even if the | |
12987 | type is recursive. Recursive types are possible in Ada. */ | |
12988 | /* ??? We could perhaps do this for all types before the switch | |
12989 | statement. */ | |
12990 | TREE_ASM_WRITTEN (type) = 1; | |
12991 | ||
a3f97cbb | 12992 | /* For these types, all that is required is that we output a DIE (or a |
73c68f61 | 12993 | set of DIEs) to represent the "basis" type. */ |
39ef6592 LC |
12994 | gen_type_die_with_usage (TREE_TYPE (type), context_die, |
12995 | DINFO_USAGE_IND_USE); | |
a3f97cbb JW |
12996 | break; |
12997 | ||
12998 | case OFFSET_TYPE: | |
556273e0 | 12999 | /* This code is used for C++ pointer-to-data-member types. |
71dfc51f | 13000 | Output a description of the relevant class type. */ |
39ef6592 LC |
13001 | gen_type_die_with_usage (TYPE_OFFSET_BASETYPE (type), context_die, |
13002 | DINFO_USAGE_IND_USE); | |
71dfc51f | 13003 | |
a3f97cbb | 13004 | /* Output a description of the type of the object pointed to. */ |
39ef6592 LC |
13005 | gen_type_die_with_usage (TREE_TYPE (type), context_die, |
13006 | DINFO_USAGE_IND_USE); | |
71dfc51f | 13007 | |
a3f97cbb | 13008 | /* Now output a DIE to represent this pointer-to-data-member type |
73c68f61 | 13009 | itself. */ |
a3f97cbb JW |
13010 | gen_ptr_to_mbr_type_die (type, context_die); |
13011 | break; | |
13012 | ||
a3f97cbb JW |
13013 | case FUNCTION_TYPE: |
13014 | /* Force out return type (in case it wasn't forced out already). */ | |
39ef6592 LC |
13015 | gen_type_die_with_usage (TREE_TYPE (type), context_die, |
13016 | DINFO_USAGE_DIR_USE); | |
a3f97cbb JW |
13017 | gen_subroutine_type_die (type, context_die); |
13018 | break; | |
13019 | ||
13020 | case METHOD_TYPE: | |
13021 | /* Force out return type (in case it wasn't forced out already). */ | |
39ef6592 LC |
13022 | gen_type_die_with_usage (TREE_TYPE (type), context_die, |
13023 | DINFO_USAGE_DIR_USE); | |
a3f97cbb JW |
13024 | gen_subroutine_type_die (type, context_die); |
13025 | break; | |
13026 | ||
13027 | case ARRAY_TYPE: | |
71d59383 | 13028 | gen_array_type_die (type, context_die); |
a3f97cbb JW |
13029 | break; |
13030 | ||
4061f623 | 13031 | case VECTOR_TYPE: |
84f0ace0 | 13032 | gen_array_type_die (type, context_die); |
4061f623 BS |
13033 | break; |
13034 | ||
a3f97cbb JW |
13035 | case ENUMERAL_TYPE: |
13036 | case RECORD_TYPE: | |
13037 | case UNION_TYPE: | |
13038 | case QUAL_UNION_TYPE: | |
2ad9852d | 13039 | /* If this is a nested type whose containing class hasn't been written |
73c68f61 SS |
13040 | out yet, writing it out will cover this one, too. This does not apply |
13041 | to instantiations of member class templates; they need to be added to | |
13042 | the containing class as they are generated. FIXME: This hurts the | |
13043 | idea of combining type decls from multiple TUs, since we can't predict | |
13044 | what set of template instantiations we'll get. */ | |
a082c85a | 13045 | if (TYPE_CONTEXT (type) |
5f2f160c | 13046 | && AGGREGATE_TYPE_P (TYPE_CONTEXT (type)) |
a082c85a | 13047 | && ! TREE_ASM_WRITTEN (TYPE_CONTEXT (type))) |
a94dbf2c | 13048 | { |
39ef6592 | 13049 | gen_type_die_with_usage (TYPE_CONTEXT (type), context_die, usage); |
a94dbf2c | 13050 | |
348bb3c7 | 13051 | if (TREE_ASM_WRITTEN (type)) |
a94dbf2c JM |
13052 | return; |
13053 | ||
13054 | /* If that failed, attach ourselves to the stub. */ | |
13055 | push_decl_scope (TYPE_CONTEXT (type)); | |
13056 | context_die = lookup_type_die (TYPE_CONTEXT (type)); | |
348bb3c7 | 13057 | need_pop = 1; |
a94dbf2c | 13058 | } |
348bb3c7 | 13059 | else |
66c78aa9 JM |
13060 | { |
13061 | declare_in_namespace (type, context_die); | |
13062 | need_pop = 0; | |
13063 | } | |
a94dbf2c JM |
13064 | |
13065 | if (TREE_CODE (type) == ENUMERAL_TYPE) | |
ae64e535 ILT |
13066 | { |
13067 | /* This might have been written out by the call to | |
13068 | declare_in_namespace. */ | |
13069 | if (!TREE_ASM_WRITTEN (type)) | |
13070 | gen_enumeration_type_die (type, context_die); | |
13071 | } | |
a3f97cbb | 13072 | else |
39ef6592 | 13073 | gen_struct_or_union_type_die (type, context_die, usage); |
4b674448 | 13074 | |
348bb3c7 | 13075 | if (need_pop) |
a94dbf2c JM |
13076 | pop_decl_scope (); |
13077 | ||
4b674448 | 13078 | /* Don't set TREE_ASM_WRITTEN on an incomplete struct; we want to fix |
a082c85a JM |
13079 | it up if it is ever completed. gen_*_type_die will set it for us |
13080 | when appropriate. */ | |
13081 | return; | |
a3f97cbb JW |
13082 | |
13083 | case VOID_TYPE: | |
13084 | case INTEGER_TYPE: | |
13085 | case REAL_TYPE: | |
13086 | case COMPLEX_TYPE: | |
13087 | case BOOLEAN_TYPE: | |
a3f97cbb JW |
13088 | /* No DIEs needed for fundamental types. */ |
13089 | break; | |
13090 | ||
13091 | case LANG_TYPE: | |
13092 | /* No Dwarf representation currently defined. */ | |
13093 | break; | |
13094 | ||
13095 | default: | |
ced3f397 | 13096 | gcc_unreachable (); |
a3f97cbb JW |
13097 | } |
13098 | ||
13099 | TREE_ASM_WRITTEN (type) = 1; | |
13100 | } | |
13101 | ||
39ef6592 LC |
13102 | static void |
13103 | gen_type_die (tree type, dw_die_ref context_die) | |
13104 | { | |
13105 | gen_type_die_with_usage (type, context_die, DINFO_USAGE_DIR_USE); | |
13106 | } | |
13107 | ||
a3f97cbb | 13108 | /* Generate a DIE for a tagged type instantiation. */ |
71dfc51f | 13109 | |
a3f97cbb | 13110 | static void |
7080f735 | 13111 | gen_tagged_type_instantiation_die (tree type, dw_die_ref context_die) |
a3f97cbb | 13112 | { |
71dfc51f RK |
13113 | if (type == NULL_TREE || type == error_mark_node) |
13114 | return; | |
a3f97cbb | 13115 | |
38e01259 | 13116 | /* We are going to output a DIE to represent the unqualified version of |
a3f97cbb JW |
13117 | this type (i.e. without any const or volatile qualifiers) so make sure |
13118 | that we have the main variant (i.e. the unqualified version) of this | |
13119 | type now. */ | |
ced3f397 | 13120 | gcc_assert (type == type_main_variant (type)); |
a3f97cbb | 13121 | |
203588e7 | 13122 | /* Do not check TREE_ASM_WRITTEN (type) as it may not be set if this is |
bbc6ae08 | 13123 | an instance of an unresolved type. */ |
556273e0 | 13124 | |
a3f97cbb JW |
13125 | switch (TREE_CODE (type)) |
13126 | { | |
13127 | case ERROR_MARK: | |
13128 | break; | |
13129 | ||
13130 | case ENUMERAL_TYPE: | |
13131 | gen_inlined_enumeration_type_die (type, context_die); | |
13132 | break; | |
13133 | ||
13134 | case RECORD_TYPE: | |
13135 | gen_inlined_structure_type_die (type, context_die); | |
13136 | break; | |
13137 | ||
13138 | case UNION_TYPE: | |
13139 | case QUAL_UNION_TYPE: | |
13140 | gen_inlined_union_type_die (type, context_die); | |
13141 | break; | |
13142 | ||
13143 | default: | |
ced3f397 | 13144 | gcc_unreachable (); |
a3f97cbb JW |
13145 | } |
13146 | } | |
13147 | ||
13148 | /* Generate a DW_TAG_lexical_block DIE followed by DIEs to represent all of the | |
13149 | things which are local to the given block. */ | |
71dfc51f | 13150 | |
a3f97cbb | 13151 | static void |
7080f735 | 13152 | gen_block_die (tree stmt, dw_die_ref context_die, int depth) |
a3f97cbb | 13153 | { |
b3694847 SS |
13154 | int must_output_die = 0; |
13155 | tree origin; | |
13156 | tree decl; | |
13157 | enum tree_code origin_code; | |
a3f97cbb | 13158 | |
9acf766f DB |
13159 | /* Ignore blocks that are NULL. */ |
13160 | if (stmt == NULL_TREE) | |
71dfc51f | 13161 | return; |
a3f97cbb | 13162 | |
a20612aa RH |
13163 | /* If the block is one fragment of a non-contiguous block, do not |
13164 | process the variables, since they will have been done by the | |
13165 | origin block. Do process subblocks. */ | |
13166 | if (BLOCK_FRAGMENT_ORIGIN (stmt)) | |
13167 | { | |
13168 | tree sub; | |
13169 | ||
2ad9852d | 13170 | for (sub = BLOCK_SUBBLOCKS (stmt); sub; sub = BLOCK_CHAIN (sub)) |
a20612aa | 13171 | gen_block_die (sub, context_die, depth + 1); |
2ad9852d | 13172 | |
a20612aa RH |
13173 | return; |
13174 | } | |
13175 | ||
a3f97cbb JW |
13176 | /* Determine the "ultimate origin" of this block. This block may be an |
13177 | inlined instance of an inlined instance of inline function, so we have | |
13178 | to trace all of the way back through the origin chain to find out what | |
13179 | sort of node actually served as the original seed for the creation of | |
13180 | the current block. */ | |
13181 | origin = block_ultimate_origin (stmt); | |
13182 | origin_code = (origin != NULL) ? TREE_CODE (origin) : ERROR_MARK; | |
13183 | ||
13184 | /* Determine if we need to output any Dwarf DIEs at all to represent this | |
13185 | block. */ | |
13186 | if (origin_code == FUNCTION_DECL) | |
71dfc51f RK |
13187 | /* The outer scopes for inlinings *must* always be represented. We |
13188 | generate DW_TAG_inlined_subroutine DIEs for them. (See below.) */ | |
13189 | must_output_die = 1; | |
a3f97cbb JW |
13190 | else |
13191 | { | |
13192 | /* In the case where the current block represents an inlining of the | |
73c68f61 SS |
13193 | "body block" of an inline function, we must *NOT* output any DIE for |
13194 | this block because we have already output a DIE to represent the whole | |
13195 | inlined function scope and the "body block" of any function doesn't | |
13196 | really represent a different scope according to ANSI C rules. So we | |
13197 | check here to make sure that this block does not represent a "body | |
13198 | block inlining" before trying to set the MUST_OUTPUT_DIE flag. */ | |
d7248bff | 13199 | if (! is_body_block (origin ? origin : stmt)) |
a3f97cbb JW |
13200 | { |
13201 | /* Determine if this block directly contains any "significant" | |
13202 | local declarations which we will need to output DIEs for. */ | |
13203 | if (debug_info_level > DINFO_LEVEL_TERSE) | |
71dfc51f RK |
13204 | /* We are not in terse mode so *any* local declaration counts |
13205 | as being a "significant" one. */ | |
2878ea73 MS |
13206 | must_output_die = (BLOCK_VARS (stmt) != NULL |
13207 | && (TREE_USED (stmt) | |
9acf766f DB |
13208 | || TREE_ASM_WRITTEN (stmt) |
13209 | || BLOCK_ABSTRACT (stmt))); | |
a3f97cbb | 13210 | else |
71dfc51f RK |
13211 | /* We are in terse mode, so only local (nested) function |
13212 | definitions count as "significant" local declarations. */ | |
13213 | for (decl = BLOCK_VARS (stmt); | |
13214 | decl != NULL; decl = TREE_CHAIN (decl)) | |
13215 | if (TREE_CODE (decl) == FUNCTION_DECL | |
13216 | && DECL_INITIAL (decl)) | |
a3f97cbb | 13217 | { |
71dfc51f RK |
13218 | must_output_die = 1; |
13219 | break; | |
a3f97cbb | 13220 | } |
a3f97cbb JW |
13221 | } |
13222 | } | |
13223 | ||
13224 | /* It would be a waste of space to generate a Dwarf DW_TAG_lexical_block | |
13225 | DIE for any block which contains no significant local declarations at | |
13226 | all. Rather, in such cases we just call `decls_for_scope' so that any | |
13227 | needed Dwarf info for any sub-blocks will get properly generated. Note | |
13228 | that in terse mode, our definition of what constitutes a "significant" | |
13229 | local declaration gets restricted to include only inlined function | |
13230 | instances and local (nested) function definitions. */ | |
13231 | if (must_output_die) | |
13232 | { | |
13233 | if (origin_code == FUNCTION_DECL) | |
71dfc51f | 13234 | gen_inlined_subroutine_die (stmt, context_die, depth); |
a3f97cbb | 13235 | else |
71dfc51f | 13236 | gen_lexical_block_die (stmt, context_die, depth); |
a3f97cbb JW |
13237 | } |
13238 | else | |
d7248bff | 13239 | decls_for_scope (stmt, context_die, depth); |
a3f97cbb JW |
13240 | } |
13241 | ||
13242 | /* Generate all of the decls declared within a given scope and (recursively) | |
9ec36da5 | 13243 | all of its sub-blocks. */ |
71dfc51f | 13244 | |
a3f97cbb | 13245 | static void |
7080f735 | 13246 | decls_for_scope (tree stmt, dw_die_ref context_die, int depth) |
a3f97cbb | 13247 | { |
b3694847 SS |
13248 | tree decl; |
13249 | tree subblocks; | |
71dfc51f | 13250 | |
9acf766f DB |
13251 | /* Ignore NULL blocks. */ |
13252 | if (stmt == NULL_TREE) | |
71dfc51f RK |
13253 | return; |
13254 | ||
9acf766f | 13255 | if (TREE_USED (stmt)) |
a3f97cbb | 13256 | { |
9acf766f DB |
13257 | /* Output the DIEs to represent all of the data objects and typedefs |
13258 | declared directly within this block but not within any nested | |
13259 | sub-blocks. Also, nested function and tag DIEs have been | |
13260 | generated with a parent of NULL; fix that up now. */ | |
13261 | for (decl = BLOCK_VARS (stmt); decl != NULL; decl = TREE_CHAIN (decl)) | |
13262 | { | |
13263 | dw_die_ref die; | |
2878ea73 | 13264 | |
9acf766f DB |
13265 | if (TREE_CODE (decl) == FUNCTION_DECL) |
13266 | die = lookup_decl_die (decl); | |
13267 | else if (TREE_CODE (decl) == TYPE_DECL && TYPE_DECL_IS_STUB (decl)) | |
13268 | die = lookup_type_die (TREE_TYPE (decl)); | |
13269 | else | |
13270 | die = NULL; | |
2878ea73 | 13271 | |
9acf766f DB |
13272 | if (die != NULL && die->die_parent == NULL) |
13273 | add_child_die (context_die, die); | |
30be951a JH |
13274 | /* Do not produce debug information for static variables since |
13275 | these might be optimized out. We are called for these later | |
8a4a83ed | 13276 | in varpool_analyze_pending_decls. */ |
30be951a JH |
13277 | if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)) |
13278 | ; | |
9acf766f DB |
13279 | else |
13280 | gen_decl_die (decl, context_die); | |
13281 | } | |
a3f97cbb JW |
13282 | } |
13283 | ||
8cadae7e JM |
13284 | /* If we're at -g1, we're not interested in subblocks. */ |
13285 | if (debug_info_level <= DINFO_LEVEL_TERSE) | |
13286 | return; | |
13287 | ||
a3f97cbb JW |
13288 | /* Output the DIEs to represent all sub-blocks (and the items declared |
13289 | therein) of this block. */ | |
13290 | for (subblocks = BLOCK_SUBBLOCKS (stmt); | |
13291 | subblocks != NULL; | |
13292 | subblocks = BLOCK_CHAIN (subblocks)) | |
71dfc51f | 13293 | gen_block_die (subblocks, context_die, depth + 1); |
a3f97cbb JW |
13294 | } |
13295 | ||
a94dbf2c | 13296 | /* Is this a typedef we can avoid emitting? */ |
71dfc51f RK |
13297 | |
13298 | static inline int | |
7080f735 | 13299 | is_redundant_typedef (tree decl) |
a94dbf2c JM |
13300 | { |
13301 | if (TYPE_DECL_IS_STUB (decl)) | |
13302 | return 1; | |
71dfc51f | 13303 | |
a94dbf2c JM |
13304 | if (DECL_ARTIFICIAL (decl) |
13305 | && DECL_CONTEXT (decl) | |
13306 | && is_tagged_type (DECL_CONTEXT (decl)) | |
13307 | && TREE_CODE (TYPE_NAME (DECL_CONTEXT (decl))) == TYPE_DECL | |
13308 | && DECL_NAME (decl) == DECL_NAME (TYPE_NAME (DECL_CONTEXT (decl)))) | |
13309 | /* Also ignore the artificial member typedef for the class name. */ | |
13310 | return 1; | |
71dfc51f | 13311 | |
a94dbf2c JM |
13312 | return 0; |
13313 | } | |
13314 | ||
535a42b1 | 13315 | /* Returns the DIE for decl. A DIE will always be returned. */ |
6097b0c3 DP |
13316 | |
13317 | static dw_die_ref | |
13318 | force_decl_die (tree decl) | |
13319 | { | |
13320 | dw_die_ref decl_die; | |
13321 | unsigned saved_external_flag; | |
13322 | tree save_fn = NULL_TREE; | |
13323 | decl_die = lookup_decl_die (decl); | |
13324 | if (!decl_die) | |
13325 | { | |
13326 | dw_die_ref context_die; | |
13327 | tree decl_context = DECL_CONTEXT (decl); | |
13328 | if (decl_context) | |
13329 | { | |
13330 | /* Find die that represents this context. */ | |
13331 | if (TYPE_P (decl_context)) | |
13332 | context_die = force_type_die (decl_context); | |
13333 | else | |
13334 | context_die = force_decl_die (decl_context); | |
13335 | } | |
13336 | else | |
13337 | context_die = comp_unit_die; | |
13338 | ||
d3e4cd01 JM |
13339 | decl_die = lookup_decl_die (decl); |
13340 | if (decl_die) | |
13341 | return decl_die; | |
13342 | ||
6097b0c3 DP |
13343 | switch (TREE_CODE (decl)) |
13344 | { | |
13345 | case FUNCTION_DECL: | |
13346 | /* Clear current_function_decl, so that gen_subprogram_die thinks | |
13347 | that this is a declaration. At this point, we just want to force | |
13348 | declaration die. */ | |
13349 | save_fn = current_function_decl; | |
13350 | current_function_decl = NULL_TREE; | |
13351 | gen_subprogram_die (decl, context_die); | |
a1c496cb | 13352 | current_function_decl = save_fn; |
6097b0c3 DP |
13353 | break; |
13354 | ||
13355 | case VAR_DECL: | |
13356 | /* Set external flag to force declaration die. Restore it after | |
13357 | gen_decl_die() call. */ | |
13358 | saved_external_flag = DECL_EXTERNAL (decl); | |
13359 | DECL_EXTERNAL (decl) = 1; | |
13360 | gen_decl_die (decl, context_die); | |
13361 | DECL_EXTERNAL (decl) = saved_external_flag; | |
13362 | break; | |
13363 | ||
13364 | case NAMESPACE_DECL: | |
13365 | dwarf2out_decl (decl); | |
13366 | break; | |
13367 | ||
13368 | default: | |
ced3f397 | 13369 | gcc_unreachable (); |
6097b0c3 | 13370 | } |
a1c496cb | 13371 | |
535a42b1 | 13372 | /* We should be able to find the DIE now. */ |
6097b0c3 DP |
13373 | if (!decl_die) |
13374 | decl_die = lookup_decl_die (decl); | |
ced3f397 | 13375 | gcc_assert (decl_die); |
6097b0c3 | 13376 | } |
a1c496cb | 13377 | |
6097b0c3 DP |
13378 | return decl_die; |
13379 | } | |
66c78aa9 | 13380 | |
8857ae1c AO |
13381 | /* Returns the DIE for TYPE, that must not be a base type. A DIE is |
13382 | always returned. */ | |
66c78aa9 JM |
13383 | |
13384 | static dw_die_ref | |
6097b0c3 | 13385 | force_type_die (tree type) |
66c78aa9 | 13386 | { |
6097b0c3 | 13387 | dw_die_ref type_die; |
66c78aa9 | 13388 | |
9733d507 | 13389 | type_die = lookup_type_die (type); |
6097b0c3 DP |
13390 | if (!type_die) |
13391 | { | |
13392 | dw_die_ref context_die; | |
13393 | if (TYPE_CONTEXT (type)) | |
d3e4cd01 JM |
13394 | { |
13395 | if (TYPE_P (TYPE_CONTEXT (type))) | |
13396 | context_die = force_type_die (TYPE_CONTEXT (type)); | |
13397 | else | |
13398 | context_die = force_decl_die (TYPE_CONTEXT (type)); | |
13399 | } | |
6097b0c3 DP |
13400 | else |
13401 | context_die = comp_unit_die; | |
66c78aa9 | 13402 | |
d3e4cd01 JM |
13403 | type_die = lookup_type_die (type); |
13404 | if (type_die) | |
13405 | return type_die; | |
6097b0c3 | 13406 | gen_type_die (type, context_die); |
9733d507 | 13407 | type_die = lookup_type_die (type); |
ced3f397 | 13408 | gcc_assert (type_die); |
6097b0c3 DP |
13409 | } |
13410 | return type_die; | |
66c78aa9 JM |
13411 | } |
13412 | ||
13413 | /* Force out any required namespaces to be able to output DECL, | |
13414 | and return the new context_die for it, if it's changed. */ | |
13415 | ||
13416 | static dw_die_ref | |
13417 | setup_namespace_context (tree thing, dw_die_ref context_die) | |
13418 | { | |
6615c446 JO |
13419 | tree context = (DECL_P (thing) |
13420 | ? DECL_CONTEXT (thing) : TYPE_CONTEXT (thing)); | |
66c78aa9 | 13421 | if (context && TREE_CODE (context) == NAMESPACE_DECL) |
6614fd40 | 13422 | /* Force out the namespace. */ |
6097b0c3 | 13423 | context_die = force_decl_die (context); |
66c78aa9 JM |
13424 | |
13425 | return context_die; | |
13426 | } | |
13427 | ||
13428 | /* Emit a declaration DIE for THING (which is either a DECL or a tagged | |
13429 | type) within its namespace, if appropriate. | |
13430 | ||
13431 | For compatibility with older debuggers, namespace DIEs only contain | |
13432 | declarations; all definitions are emitted at CU scope. */ | |
13433 | ||
13434 | static void | |
13435 | declare_in_namespace (tree thing, dw_die_ref context_die) | |
13436 | { | |
13437 | dw_die_ref ns_context; | |
13438 | ||
13439 | if (debug_info_level <= DINFO_LEVEL_TERSE) | |
13440 | return; | |
13441 | ||
0eb971bd JW |
13442 | /* If this decl is from an inlined function, then don't try to emit it in its |
13443 | namespace, as we will get confused. It would have already been emitted | |
13444 | when the abstract instance of the inline function was emitted anyways. */ | |
13445 | if (DECL_P (thing) && DECL_ABSTRACT_ORIGIN (thing)) | |
13446 | return; | |
13447 | ||
66c78aa9 JM |
13448 | ns_context = setup_namespace_context (thing, context_die); |
13449 | ||
13450 | if (ns_context != context_die) | |
13451 | { | |
13452 | if (DECL_P (thing)) | |
13453 | gen_decl_die (thing, ns_context); | |
13454 | else | |
13455 | gen_type_die (thing, ns_context); | |
13456 | } | |
13457 | } | |
13458 | ||
6614fd40 | 13459 | /* Generate a DIE for a namespace or namespace alias. */ |
66c78aa9 JM |
13460 | |
13461 | static void | |
13462 | gen_namespace_die (tree decl) | |
13463 | { | |
13464 | dw_die_ref context_die = setup_namespace_context (decl, comp_unit_die); | |
13465 | ||
13466 | /* Namespace aliases have a DECL_ABSTRACT_ORIGIN of the namespace | |
e0a21ab9 | 13467 | they are an alias of. */ |
66c78aa9 JM |
13468 | if (DECL_ABSTRACT_ORIGIN (decl) == NULL) |
13469 | { | |
6614fd40 | 13470 | /* Output a real namespace. */ |
66c78aa9 JM |
13471 | dw_die_ref namespace_die |
13472 | = new_die (DW_TAG_namespace, context_die, decl); | |
13473 | add_name_and_src_coords_attributes (namespace_die, decl); | |
13474 | equate_decl_number_to_die (decl, namespace_die); | |
13475 | } | |
13476 | else | |
13477 | { | |
6614fd40 | 13478 | /* Output a namespace alias. */ |
66c78aa9 | 13479 | |
6614fd40 | 13480 | /* Force out the namespace we are an alias of, if necessary. */ |
66c78aa9 | 13481 | dw_die_ref origin_die |
6097b0c3 | 13482 | = force_decl_die (DECL_ABSTRACT_ORIGIN (decl)); |
66c78aa9 | 13483 | |
6614fd40 | 13484 | /* Now create the namespace alias DIE. */ |
66c78aa9 JM |
13485 | dw_die_ref namespace_die |
13486 | = new_die (DW_TAG_imported_declaration, context_die, decl); | |
13487 | add_name_and_src_coords_attributes (namespace_die, decl); | |
13488 | add_AT_die_ref (namespace_die, DW_AT_import, origin_die); | |
13489 | equate_decl_number_to_die (decl, namespace_die); | |
13490 | } | |
13491 | } | |
13492 | ||
a3f97cbb | 13493 | /* Generate Dwarf debug information for a decl described by DECL. */ |
71dfc51f | 13494 | |
a3f97cbb | 13495 | static void |
7080f735 | 13496 | gen_decl_die (tree decl, dw_die_ref context_die) |
a3f97cbb | 13497 | { |
b3694847 | 13498 | tree origin; |
71dfc51f | 13499 | |
f11c3043 | 13500 | if (DECL_P (decl) && DECL_IGNORED_P (decl)) |
71dfc51f | 13501 | return; |
a3f97cbb | 13502 | |
a3f97cbb JW |
13503 | switch (TREE_CODE (decl)) |
13504 | { | |
2ad9852d RK |
13505 | case ERROR_MARK: |
13506 | break; | |
13507 | ||
a3f97cbb | 13508 | case CONST_DECL: |
556273e0 | 13509 | /* The individual enumerators of an enum type get output when we output |
73c68f61 | 13510 | the Dwarf representation of the relevant enum type itself. */ |
a3f97cbb JW |
13511 | break; |
13512 | ||
13513 | case FUNCTION_DECL: | |
4edb7b60 JM |
13514 | /* Don't output any DIEs to represent mere function declarations, |
13515 | unless they are class members or explicit block externs. */ | |
13516 | if (DECL_INITIAL (decl) == NULL_TREE && DECL_CONTEXT (decl) == NULL_TREE | |
777ad4c2 | 13517 | && (current_function_decl == NULL_TREE || DECL_ARTIFICIAL (decl))) |
71dfc51f | 13518 | break; |
bdb669cb | 13519 | |
6de9cd9a DN |
13520 | #if 0 |
13521 | /* FIXME */ | |
13522 | /* This doesn't work because the C frontend sets DECL_ABSTRACT_ORIGIN | |
13523 | on local redeclarations of global functions. That seems broken. */ | |
13524 | if (current_function_decl != decl) | |
13525 | /* This is only a declaration. */; | |
13526 | #endif | |
13527 | ||
5daf7c0a JM |
13528 | /* If we're emitting a clone, emit info for the abstract instance. */ |
13529 | if (DECL_ORIGIN (decl) != decl) | |
13530 | dwarf2out_abstract_function (DECL_ABSTRACT_ORIGIN (decl)); | |
2ad9852d | 13531 | |
1cfdcc15 JM |
13532 | /* If we're emitting an out-of-line copy of an inline function, |
13533 | emit info for the abstract instance and set up to refer to it. */ | |
1bb17c21 JH |
13534 | else if (cgraph_function_possibly_inlined_p (decl) |
13535 | && ! DECL_ABSTRACT (decl) | |
66c78aa9 | 13536 | && ! class_or_namespace_scope_p (context_die) |
5daf7c0a JM |
13537 | /* dwarf2out_abstract_function won't emit a die if this is just |
13538 | a declaration. We must avoid setting DECL_ABSTRACT_ORIGIN in | |
13539 | that case, because that works only if we have a die. */ | |
13540 | && DECL_INITIAL (decl) != NULL_TREE) | |
1cfdcc15 | 13541 | { |
1edf43d6 | 13542 | dwarf2out_abstract_function (decl); |
1cfdcc15 JM |
13543 | set_decl_origin_self (decl); |
13544 | } | |
2ad9852d | 13545 | |
5daf7c0a JM |
13546 | /* Otherwise we're emitting the primary DIE for this decl. */ |
13547 | else if (debug_info_level > DINFO_LEVEL_TERSE) | |
a94dbf2c JM |
13548 | { |
13549 | /* Before we describe the FUNCTION_DECL itself, make sure that we | |
13550 | have described its return type. */ | |
13551 | gen_type_die (TREE_TYPE (TREE_TYPE (decl)), context_die); | |
13552 | ||
2081603c JM |
13553 | /* And its virtual context. */ |
13554 | if (DECL_VINDEX (decl) != NULL_TREE) | |
13555 | gen_type_die (DECL_CONTEXT (decl), context_die); | |
13556 | ||
a94dbf2c JM |
13557 | /* And its containing type. */ |
13558 | origin = decl_class_context (decl); | |
71dfc51f | 13559 | if (origin != NULL_TREE) |
10a11b75 | 13560 | gen_type_die_for_member (origin, decl, context_die); |
66c78aa9 JM |
13561 | |
13562 | /* And its containing namespace. */ | |
13563 | declare_in_namespace (decl, context_die); | |
a94dbf2c | 13564 | } |
a3f97cbb JW |
13565 | |
13566 | /* Now output a DIE to represent the function itself. */ | |
13567 | gen_subprogram_die (decl, context_die); | |
13568 | break; | |
13569 | ||
13570 | case TYPE_DECL: | |
13571 | /* If we are in terse mode, don't generate any DIEs to represent any | |
73c68f61 | 13572 | actual typedefs. */ |
a3f97cbb | 13573 | if (debug_info_level <= DINFO_LEVEL_TERSE) |
4927276d | 13574 | break; |
a3f97cbb | 13575 | |
2ad9852d | 13576 | /* In the special case of a TYPE_DECL node representing the declaration |
73c68f61 SS |
13577 | of some type tag, if the given TYPE_DECL is marked as having been |
13578 | instantiated from some other (original) TYPE_DECL node (e.g. one which | |
13579 | was generated within the original definition of an inline function) we | |
13580 | have to generate a special (abbreviated) DW_TAG_structure_type, | |
13581 | DW_TAG_union_type, or DW_TAG_enumeration_type DIE here. */ | |
2081603c | 13582 | if (TYPE_DECL_IS_STUB (decl) && decl_ultimate_origin (decl) != NULL_TREE) |
a3f97cbb JW |
13583 | { |
13584 | gen_tagged_type_instantiation_die (TREE_TYPE (decl), context_die); | |
13585 | break; | |
13586 | } | |
a3f97cbb | 13587 | |
a94dbf2c JM |
13588 | if (is_redundant_typedef (decl)) |
13589 | gen_type_die (TREE_TYPE (decl), context_die); | |
13590 | else | |
71dfc51f RK |
13591 | /* Output a DIE to represent the typedef itself. */ |
13592 | gen_typedef_die (decl, context_die); | |
a3f97cbb JW |
13593 | break; |
13594 | ||
13595 | case LABEL_DECL: | |
13596 | if (debug_info_level >= DINFO_LEVEL_NORMAL) | |
71dfc51f | 13597 | gen_label_die (decl, context_die); |
a3f97cbb JW |
13598 | break; |
13599 | ||
13600 | case VAR_DECL: | |
6de9cd9a | 13601 | case RESULT_DECL: |
a3f97cbb | 13602 | /* If we are in terse mode, don't generate any DIEs to represent any |
73c68f61 | 13603 | variable declarations or definitions. */ |
a3f97cbb | 13604 | if (debug_info_level <= DINFO_LEVEL_TERSE) |
71dfc51f | 13605 | break; |
a3f97cbb JW |
13606 | |
13607 | /* Output any DIEs that are needed to specify the type of this data | |
73c68f61 | 13608 | object. */ |
a3f97cbb JW |
13609 | gen_type_die (TREE_TYPE (decl), context_die); |
13610 | ||
a94dbf2c JM |
13611 | /* And its containing type. */ |
13612 | origin = decl_class_context (decl); | |
71dfc51f | 13613 | if (origin != NULL_TREE) |
10a11b75 | 13614 | gen_type_die_for_member (origin, decl, context_die); |
a94dbf2c | 13615 | |
66c78aa9 JM |
13616 | /* And its containing namespace. */ |
13617 | declare_in_namespace (decl, context_die); | |
13618 | ||
a3f97cbb | 13619 | /* Now output the DIE to represent the data object itself. This gets |
73c68f61 SS |
13620 | complicated because of the possibility that the VAR_DECL really |
13621 | represents an inlined instance of a formal parameter for an inline | |
13622 | function. */ | |
a3f97cbb | 13623 | origin = decl_ultimate_origin (decl); |
71dfc51f RK |
13624 | if (origin != NULL_TREE && TREE_CODE (origin) == PARM_DECL) |
13625 | gen_formal_parameter_die (decl, context_die); | |
a3f97cbb | 13626 | else |
71dfc51f | 13627 | gen_variable_die (decl, context_die); |
a3f97cbb JW |
13628 | break; |
13629 | ||
13630 | case FIELD_DECL: | |
2ad9852d | 13631 | /* Ignore the nameless fields that are used to skip bits but handle C++ |
3199cb41 | 13632 | anonymous unions and structs. */ |
71dfc51f | 13633 | if (DECL_NAME (decl) != NULL_TREE |
3199cb41 UW |
13634 | || TREE_CODE (TREE_TYPE (decl)) == UNION_TYPE |
13635 | || TREE_CODE (TREE_TYPE (decl)) == RECORD_TYPE) | |
a3f97cbb JW |
13636 | { |
13637 | gen_type_die (member_declared_type (decl), context_die); | |
13638 | gen_field_die (decl, context_die); | |
13639 | } | |
13640 | break; | |
13641 | ||
13642 | case PARM_DECL: | |
13643 | gen_type_die (TREE_TYPE (decl), context_die); | |
13644 | gen_formal_parameter_die (decl, context_die); | |
13645 | break; | |
13646 | ||
348bb3c7 | 13647 | case NAMESPACE_DECL: |
66c78aa9 | 13648 | gen_namespace_die (decl); |
348bb3c7 JM |
13649 | break; |
13650 | ||
a3f97cbb | 13651 | default: |
ced3f397 NS |
13652 | /* Probably some frontend-internal decl. Assume we don't care. */ |
13653 | gcc_assert ((int)TREE_CODE (decl) > NUM_TREE_CODES); | |
13654 | break; | |
a3f97cbb | 13655 | } |
a3f97cbb JW |
13656 | } |
13657 | \f | |
2ad9852d | 13658 | /* Output debug information for global decl DECL. Called from toplev.c after |
2b85879e | 13659 | compilation proper has finished. */ |
2ad9852d | 13660 | |
2b85879e | 13661 | static void |
7080f735 | 13662 | dwarf2out_global_decl (tree decl) |
2b85879e NB |
13663 | { |
13664 | /* Output DWARF2 information for file-scope tentative data object | |
2ad9852d RK |
13665 | declarations, file-scope (extern) function declarations (which had no |
13666 | corresponding body) and file-scope tagged type declarations and | |
13667 | definitions which have not yet been forced out. */ | |
2b85879e NB |
13668 | if (TREE_CODE (decl) != FUNCTION_DECL || !DECL_INITIAL (decl)) |
13669 | dwarf2out_decl (decl); | |
13670 | } | |
13671 | ||
21d13d83 ZW |
13672 | /* Output debug information for type decl DECL. Called from toplev.c |
13673 | and from language front ends (to record built-in types). */ | |
13674 | static void | |
13675 | dwarf2out_type_decl (tree decl, int local) | |
13676 | { | |
13677 | if (!local) | |
13678 | dwarf2out_decl (decl); | |
13679 | } | |
13680 | ||
a1c496cb EC |
13681 | /* Output debug information for imported module or decl. */ |
13682 | ||
6097b0c3 DP |
13683 | static void |
13684 | dwarf2out_imported_module_or_decl (tree decl, tree context) | |
13685 | { | |
13686 | dw_die_ref imported_die, at_import_die; | |
13687 | dw_die_ref scope_die; | |
6773e15f | 13688 | expanded_location xloc; |
a1c496cb | 13689 | |
6097b0c3 DP |
13690 | if (debug_info_level <= DINFO_LEVEL_TERSE) |
13691 | return; | |
13692 | ||
ced3f397 | 13693 | gcc_assert (decl); |
6097b0c3 DP |
13694 | |
13695 | /* To emit DW_TAG_imported_module or DW_TAG_imported_decl, we need two DIEs. | |
a1c496cb | 13696 | We need decl DIE for reference and scope die. First, get DIE for the decl |
6097b0c3 DP |
13697 | itself. */ |
13698 | ||
13699 | /* Get the scope die for decl context. Use comp_unit_die for global module | |
13700 | or decl. If die is not found for non globals, force new die. */ | |
13701 | if (!context) | |
13702 | scope_die = comp_unit_die; | |
13703 | else if (TYPE_P (context)) | |
39ef6592 LC |
13704 | { |
13705 | if (!should_emit_struct_debug (context, DINFO_USAGE_DIR_USE)) | |
13706 | return; | |
6097b0c3 | 13707 | scope_die = force_type_die (context); |
39ef6592 | 13708 | } |
6097b0c3 DP |
13709 | else |
13710 | scope_die = force_decl_die (context); | |
13711 | ||
834eb1f0 GS |
13712 | /* For TYPE_DECL or CONST_DECL, lookup TREE_TYPE. */ |
13713 | if (TREE_CODE (decl) == TYPE_DECL || TREE_CODE (decl) == CONST_DECL) | |
8857ae1c AO |
13714 | { |
13715 | if (is_base_type (TREE_TYPE (decl))) | |
13716 | at_import_die = base_type_die (TREE_TYPE (decl)); | |
13717 | else | |
13718 | at_import_die = force_type_die (TREE_TYPE (decl)); | |
13719 | } | |
6097b0c3 | 13720 | else |
a288c5cd JJ |
13721 | { |
13722 | at_import_die = lookup_decl_die (decl); | |
13723 | if (!at_import_die) | |
13724 | { | |
13725 | /* If we're trying to avoid duplicate debug info, we may not have | |
13726 | emitted the member decl for this field. Emit it now. */ | |
13727 | if (TREE_CODE (decl) == FIELD_DECL) | |
13728 | { | |
13729 | tree type = DECL_CONTEXT (decl); | |
13730 | dw_die_ref type_context_die; | |
13731 | ||
13732 | if (TYPE_CONTEXT (type)) | |
13733 | if (TYPE_P (TYPE_CONTEXT (type))) | |
39ef6592 LC |
13734 | { |
13735 | if (!should_emit_struct_debug (TYPE_CONTEXT (type), | |
13736 | DINFO_USAGE_DIR_USE)) | |
13737 | return; | |
a288c5cd | 13738 | type_context_die = force_type_die (TYPE_CONTEXT (type)); |
39ef6592 | 13739 | } |
a288c5cd JJ |
13740 | else |
13741 | type_context_die = force_decl_die (TYPE_CONTEXT (type)); | |
13742 | else | |
13743 | type_context_die = comp_unit_die; | |
13744 | gen_type_die_for_member (type, decl, type_context_die); | |
13745 | } | |
13746 | at_import_die = force_decl_die (decl); | |
13747 | } | |
13748 | } | |
a1c496cb EC |
13749 | |
13750 | /* OK, now we have DIEs for decl as well as scope. Emit imported die. */ | |
6097b0c3 DP |
13751 | if (TREE_CODE (decl) == NAMESPACE_DECL) |
13752 | imported_die = new_die (DW_TAG_imported_module, scope_die, context); | |
13753 | else | |
13754 | imported_die = new_die (DW_TAG_imported_declaration, scope_die, context); | |
6773e15f PB |
13755 | |
13756 | xloc = expand_location (input_location); | |
d5688810 | 13757 | add_AT_file (imported_die, DW_AT_decl_file, lookup_filename (xloc.file)); |
6773e15f | 13758 | add_AT_unsigned (imported_die, DW_AT_decl_line, xloc.line); |
6097b0c3 DP |
13759 | add_AT_die_ref (imported_die, DW_AT_import, at_import_die); |
13760 | } | |
13761 | ||
71dfc51f RK |
13762 | /* Write the debugging output for DECL. */ |
13763 | ||
a3f97cbb | 13764 | void |
7080f735 | 13765 | dwarf2out_decl (tree decl) |
a3f97cbb | 13766 | { |
b3694847 | 13767 | dw_die_ref context_die = comp_unit_die; |
88dad228 | 13768 | |
a3f97cbb JW |
13769 | switch (TREE_CODE (decl)) |
13770 | { | |
2ad9852d RK |
13771 | case ERROR_MARK: |
13772 | return; | |
13773 | ||
a3f97cbb | 13774 | case FUNCTION_DECL: |
a3f97cbb | 13775 | /* What we would really like to do here is to filter out all mere |
73c68f61 SS |
13776 | file-scope declarations of file-scope functions which are never |
13777 | referenced later within this translation unit (and keep all of ones | |
13778 | that *are* referenced later on) but we aren't clairvoyant, so we have | |
13779 | no idea which functions will be referenced in the future (i.e. later | |
13780 | on within the current translation unit). So here we just ignore all | |
13781 | file-scope function declarations which are not also definitions. If | |
13782 | and when the debugger needs to know something about these functions, | |
13783 | it will have to hunt around and find the DWARF information associated | |
13784 | with the definition of the function. | |
2ad9852d RK |
13785 | |
13786 | We can't just check DECL_EXTERNAL to find out which FUNCTION_DECL | |
73c68f61 SS |
13787 | nodes represent definitions and which ones represent mere |
13788 | declarations. We have to check DECL_INITIAL instead. That's because | |
13789 | the C front-end supports some weird semantics for "extern inline" | |
13790 | function definitions. These can get inlined within the current | |
569b7f6a | 13791 | translation unit (and thus, we need to generate Dwarf info for their |
73c68f61 SS |
13792 | abstract instances so that the Dwarf info for the concrete inlined |
13793 | instances can have something to refer to) but the compiler never | |
13794 | generates any out-of-lines instances of such things (despite the fact | |
13795 | that they *are* definitions). | |
2ad9852d RK |
13796 | |
13797 | The important point is that the C front-end marks these "extern | |
13798 | inline" functions as DECL_EXTERNAL, but we need to generate DWARF for | |
13799 | them anyway. Note that the C++ front-end also plays some similar games | |
13800 | for inline function definitions appearing within include files which | |
13801 | also contain `#pragma interface' pragmas. */ | |
a3f97cbb | 13802 | if (DECL_INITIAL (decl) == NULL_TREE) |
b1ccbc24 | 13803 | return; |
88dad228 | 13804 | |
9c6cd30e JM |
13805 | /* If we're a nested function, initially use a parent of NULL; if we're |
13806 | a plain function, this will be fixed up in decls_for_scope. If | |
13807 | we're a method, it will be ignored, since we already have a DIE. */ | |
8cadae7e JM |
13808 | if (decl_function_context (decl) |
13809 | /* But if we're in terse mode, we don't care about scope. */ | |
13810 | && debug_info_level > DINFO_LEVEL_TERSE) | |
9c6cd30e | 13811 | context_die = NULL; |
a3f97cbb JW |
13812 | break; |
13813 | ||
13814 | case VAR_DECL: | |
556273e0 | 13815 | /* Ignore this VAR_DECL if it refers to a file-scope extern data object |
73c68f61 SS |
13816 | declaration and if the declaration was never even referenced from |
13817 | within this entire compilation unit. We suppress these DIEs in | |
13818 | order to save space in the .debug section (by eliminating entries | |
13819 | which are probably useless). Note that we must not suppress | |
13820 | block-local extern declarations (whether used or not) because that | |
13821 | would screw-up the debugger's name lookup mechanism and cause it to | |
13822 | miss things which really ought to be in scope at a given point. */ | |
a3f97cbb | 13823 | if (DECL_EXTERNAL (decl) && !TREE_USED (decl)) |
71dfc51f | 13824 | return; |
a3f97cbb | 13825 | |
30be951a JH |
13826 | /* For local statics lookup proper context die. */ |
13827 | if (TREE_STATIC (decl) && decl_function_context (decl)) | |
13828 | context_die = lookup_decl_die (DECL_CONTEXT (decl)); | |
13829 | ||
a3f97cbb | 13830 | /* If we are in terse mode, don't generate any DIEs to represent any |
73c68f61 | 13831 | variable declarations or definitions. */ |
a3f97cbb | 13832 | if (debug_info_level <= DINFO_LEVEL_TERSE) |
71dfc51f | 13833 | return; |
a3f97cbb JW |
13834 | break; |
13835 | ||
66c78aa9 JM |
13836 | case NAMESPACE_DECL: |
13837 | if (debug_info_level <= DINFO_LEVEL_TERSE) | |
13838 | return; | |
13839 | if (lookup_decl_die (decl) != NULL) | |
2878ea73 | 13840 | return; |
66c78aa9 JM |
13841 | break; |
13842 | ||
a3f97cbb | 13843 | case TYPE_DECL: |
57fb7689 JM |
13844 | /* Don't emit stubs for types unless they are needed by other DIEs. */ |
13845 | if (TYPE_DECL_SUPPRESS_DEBUG (decl)) | |
13846 | return; | |
13847 | ||
a3f97cbb | 13848 | /* Don't bother trying to generate any DIEs to represent any of the |
73c68f61 | 13849 | normal built-in types for the language we are compiling. */ |
6773e15f | 13850 | if (DECL_IS_BUILTIN (decl)) |
a94dbf2c JM |
13851 | { |
13852 | /* OK, we need to generate one for `bool' so GDB knows what type | |
73c68f61 | 13853 | comparisons have. */ |
9e51ddaa | 13854 | if (is_cxx () |
f11c3043 RK |
13855 | && TREE_CODE (TREE_TYPE (decl)) == BOOLEAN_TYPE |
13856 | && ! DECL_IGNORED_P (decl)) | |
a94dbf2c | 13857 | modified_type_die (TREE_TYPE (decl), 0, 0, NULL); |
71dfc51f | 13858 | |
a94dbf2c JM |
13859 | return; |
13860 | } | |
a3f97cbb | 13861 | |
88dad228 | 13862 | /* If we are in terse mode, don't generate any DIEs for types. */ |
a3f97cbb | 13863 | if (debug_info_level <= DINFO_LEVEL_TERSE) |
4927276d | 13864 | return; |
88dad228 JM |
13865 | |
13866 | /* If we're a function-scope tag, initially use a parent of NULL; | |
13867 | this will be fixed up in decls_for_scope. */ | |
13868 | if (decl_function_context (decl)) | |
3f76745e | 13869 | context_die = NULL; |
88dad228 | 13870 | |
a3f97cbb JW |
13871 | break; |
13872 | ||
13873 | default: | |
13874 | return; | |
13875 | } | |
13876 | ||
88dad228 | 13877 | gen_decl_die (decl, context_die); |
a3f97cbb JW |
13878 | } |
13879 | ||
13880 | /* Output a marker (i.e. a label) for the beginning of the generated code for | |
13881 | a lexical block. */ | |
71dfc51f | 13882 | |
a5a42b92 | 13883 | static void |
7080f735 AJ |
13884 | dwarf2out_begin_block (unsigned int line ATTRIBUTE_UNUSED, |
13885 | unsigned int blocknum) | |
a3f97cbb | 13886 | { |
d6b5193b | 13887 | switch_to_section (current_function_section ()); |
8215347e | 13888 | ASM_OUTPUT_DEBUG_LABEL (asm_out_file, BLOCK_BEGIN_LABEL, blocknum); |
a3f97cbb JW |
13889 | } |
13890 | ||
13891 | /* Output a marker (i.e. a label) for the end of the generated code for a | |
13892 | lexical block. */ | |
71dfc51f | 13893 | |
a5a42b92 | 13894 | static void |
7080f735 | 13895 | dwarf2out_end_block (unsigned int line ATTRIBUTE_UNUSED, unsigned int blocknum) |
a3f97cbb | 13896 | { |
d6b5193b | 13897 | switch_to_section (current_function_section ()); |
8215347e | 13898 | ASM_OUTPUT_DEBUG_LABEL (asm_out_file, BLOCK_END_LABEL, blocknum); |
a3f97cbb JW |
13899 | } |
13900 | ||
64b59a80 JM |
13901 | /* Returns nonzero if it is appropriate not to emit any debugging |
13902 | information for BLOCK, because it doesn't contain any instructions. | |
fcd7f76b | 13903 | |
64b59a80 JM |
13904 | Don't allow this for blocks with nested functions or local classes |
13905 | as we would end up with orphans, and in the presence of scheduling | |
13906 | we may end up calling them anyway. */ | |
13907 | ||
e1772ac0 | 13908 | static bool |
7080f735 | 13909 | dwarf2out_ignore_block (tree block) |
fcd7f76b JM |
13910 | { |
13911 | tree decl; | |
2ad9852d | 13912 | |
fcd7f76b | 13913 | for (decl = BLOCK_VARS (block); decl; decl = TREE_CHAIN (decl)) |
64b59a80 JM |
13914 | if (TREE_CODE (decl) == FUNCTION_DECL |
13915 | || (TREE_CODE (decl) == TYPE_DECL && TYPE_DECL_IS_STUB (decl))) | |
13916 | return 0; | |
2ad9852d | 13917 | |
64b59a80 | 13918 | return 1; |
fcd7f76b JM |
13919 | } |
13920 | ||
d5688810 GK |
13921 | /* Hash table routines for file_hash. */ |
13922 | ||
13923 | static int | |
13924 | file_table_eq (const void *p1_p, const void *p2_p) | |
13925 | { | |
13926 | const struct dwarf_file_data * p1 = p1_p; | |
13927 | const char * p2 = p2_p; | |
13928 | return strcmp (p1->filename, p2) == 0; | |
13929 | } | |
13930 | ||
13931 | static hashval_t | |
13932 | file_table_hash (const void *p_p) | |
13933 | { | |
13934 | const struct dwarf_file_data * p = p_p; | |
13935 | return htab_hash_string (p->filename); | |
13936 | } | |
13937 | ||
2ad9852d | 13938 | /* Lookup FILE_NAME (in the list of filenames that we know about here in |
9a666dda | 13939 | dwarf2out.c) and return its "index". The index of each (known) filename is |
2ad9852d RK |
13940 | just a unique number which is associated with only that one filename. We |
13941 | need such numbers for the sake of generating labels (in the .debug_sfnames | |
13942 | section) and references to those files numbers (in the .debug_srcinfo | |
13943 | and.debug_macinfo sections). If the filename given as an argument is not | |
13944 | found in our current list, add it to the list and assign it the next | |
13945 | available unique index number. In order to speed up searches, we remember | |
13946 | the index of the filename was looked up last. This handles the majority of | |
13947 | all searches. */ | |
71dfc51f | 13948 | |
d5688810 | 13949 | static struct dwarf_file_data * |
7080f735 | 13950 | lookup_filename (const char *file_name) |
a3f97cbb | 13951 | { |
d5688810 GK |
13952 | void ** slot; |
13953 | struct dwarf_file_data * created; | |
a3f97cbb | 13954 | |
2e18bbae RH |
13955 | /* Check to see if the file name that was searched on the previous |
13956 | call matches this file name. If so, return the index. */ | |
d5688810 GK |
13957 | if (file_table_last_lookup |
13958 | && (file_name == file_table_last_lookup->filename | |
13959 | || strcmp (file_table_last_lookup->filename, file_name) == 0)) | |
13960 | return file_table_last_lookup; | |
a3f97cbb | 13961 | |
ea4b7848 | 13962 | /* Didn't match the previous lookup, search the table. */ |
d5688810 GK |
13963 | slot = htab_find_slot_with_hash (file_table, file_name, |
13964 | htab_hash_string (file_name), INSERT); | |
13965 | if (*slot) | |
13966 | return *slot; | |
a3f97cbb | 13967 | |
d5688810 GK |
13968 | created = ggc_alloc (sizeof (struct dwarf_file_data)); |
13969 | created->filename = file_name; | |
13970 | created->emitted_number = 0; | |
13971 | *slot = created; | |
13972 | return created; | |
73c68f61 SS |
13973 | } |
13974 | ||
3e2844cb JW |
13975 | /* If the assembler will construct the file table, then translate the compiler |
13976 | internal file table number into the assembler file table number, and emit | |
13977 | a .file directive if we haven't already emitted one yet. The file table | |
13978 | numbers are different because we prune debug info for unused variables and | |
13979 | types, which may include filenames. */ | |
13980 | ||
73c68f61 | 13981 | static int |
d5688810 | 13982 | maybe_emit_file (struct dwarf_file_data * fd) |
73c68f61 | 13983 | { |
d5688810 | 13984 | if (! fd->emitted_number) |
211a0cbe | 13985 | { |
d5688810 GK |
13986 | if (last_emitted_file) |
13987 | fd->emitted_number = last_emitted_file->emitted_number + 1; | |
13988 | else | |
13989 | fd->emitted_number = 1; | |
13990 | last_emitted_file = fd; | |
2878ea73 | 13991 | |
d5688810 | 13992 | if (DWARF2_ASM_LINE_DEBUG_INFO) |
73c68f61 | 13993 | { |
d5688810 GK |
13994 | fprintf (asm_out_file, "\t.file %u ", fd->emitted_number); |
13995 | output_quoted_string (asm_out_file, fd->filename); | |
73c68f61 SS |
13996 | fputc ('\n', asm_out_file); |
13997 | } | |
211a0cbe | 13998 | } |
2878ea73 | 13999 | |
d5688810 | 14000 | return fd->emitted_number; |
a3f97cbb JW |
14001 | } |
14002 | ||
0a2d3d69 DB |
14003 | /* Called by the final INSN scan whenever we see a var location. We |
14004 | use it to drop labels in the right places, and throw the location in | |
14005 | our lookup table. */ | |
14006 | ||
14007 | static void | |
14008 | dwarf2out_var_location (rtx loc_note) | |
14009 | { | |
14010 | char loclabel[MAX_ARTIFICIAL_LABEL_BYTES]; | |
14011 | struct var_loc_node *newloc; | |
14012 | rtx prev_insn; | |
14013 | static rtx last_insn; | |
14014 | static const char *last_label; | |
ac3bfd86 | 14015 | tree decl; |
0a2d3d69 DB |
14016 | |
14017 | if (!DECL_P (NOTE_VAR_LOCATION_DECL (loc_note))) | |
14018 | return; | |
14019 | prev_insn = PREV_INSN (loc_note); | |
14020 | ||
14021 | newloc = ggc_alloc_cleared (sizeof (struct var_loc_node)); | |
14022 | /* If the insn we processed last time is the previous insn | |
14023 | and it is also a var location note, use the label we emitted | |
14024 | last time. */ | |
14025 | if (last_insn != NULL_RTX | |
14026 | && last_insn == prev_insn | |
4b4bf941 | 14027 | && NOTE_P (prev_insn) |
a38e7aa5 | 14028 | && NOTE_KIND (prev_insn) == NOTE_INSN_VAR_LOCATION) |
0a2d3d69 DB |
14029 | { |
14030 | newloc->label = last_label; | |
14031 | } | |
14032 | else | |
14033 | { | |
14034 | ASM_GENERATE_INTERNAL_LABEL (loclabel, "LVL", loclabel_num); | |
14035 | ASM_OUTPUT_DEBUG_LABEL (asm_out_file, "LVL", loclabel_num); | |
14036 | loclabel_num++; | |
14037 | newloc->label = ggc_strdup (loclabel); | |
14038 | } | |
14039 | newloc->var_loc_note = loc_note; | |
14040 | newloc->next = NULL; | |
14041 | ||
c543ca49 | 14042 | if (cfun && in_cold_section_p) |
c7466dee | 14043 | newloc->section_label = cfun->cold_section_label; |
87c8b4be CT |
14044 | else |
14045 | newloc->section_label = text_section_label; | |
14046 | ||
0a2d3d69 DB |
14047 | last_insn = loc_note; |
14048 | last_label = newloc->label; | |
ac3bfd86 | 14049 | decl = NOTE_VAR_LOCATION_DECL (loc_note); |
ac3bfd86 | 14050 | add_var_loc_to_decl (decl, newloc); |
0a2d3d69 DB |
14051 | } |
14052 | ||
14053 | /* We need to reset the locations at the beginning of each | |
14054 | function. We can't do this in the end_function hook, because the | |
1146e682 GK |
14055 | declarations that use the locations won't have been output when |
14056 | that hook is called. Also compute have_multiple_function_sections here. */ | |
0a2d3d69 DB |
14057 | |
14058 | static void | |
1146e682 | 14059 | dwarf2out_begin_function (tree fun) |
0a2d3d69 DB |
14060 | { |
14061 | htab_empty (decl_loc_table); | |
2878ea73 | 14062 | |
1146e682 GK |
14063 | if (function_section (fun) != text_section) |
14064 | have_multiple_function_sections = true; | |
0a2d3d69 DB |
14065 | } |
14066 | ||
a3f97cbb JW |
14067 | /* Output a label to mark the beginning of a source code line entry |
14068 | and record information relating to this source line, in | |
14069 | 'line_info_table' for later output of the .debug_line section. */ | |
71dfc51f | 14070 | |
e2a12aca | 14071 | static void |
7080f735 | 14072 | dwarf2out_source_line (unsigned int line, const char *filename) |
a3f97cbb | 14073 | { |
7bf6b23d JM |
14074 | if (debug_info_level >= DINFO_LEVEL_NORMAL |
14075 | && line != 0) | |
a3f97cbb | 14076 | { |
d5688810 | 14077 | int file_num = maybe_emit_file (lookup_filename (filename)); |
2878ea73 | 14078 | |
d6b5193b | 14079 | switch_to_section (current_function_section ()); |
a3f97cbb | 14080 | |
8aaf55ac JM |
14081 | /* If requested, emit something human-readable. */ |
14082 | if (flag_debug_asm) | |
14083 | fprintf (asm_out_file, "\t%s %s:%d\n", ASM_COMMENT_START, | |
14084 | filename, line); | |
14085 | ||
b2244e22 JW |
14086 | if (DWARF2_ASM_LINE_DEBUG_INFO) |
14087 | { | |
981975b6 | 14088 | /* Emit the .loc directive understood by GNU as. */ |
2e18bbae | 14089 | fprintf (asm_out_file, "\t.loc %d %d 0\n", file_num, line); |
b2244e22 JW |
14090 | |
14091 | /* Indicate that line number info exists. */ | |
2ad9852d | 14092 | line_info_table_in_use++; |
b2244e22 | 14093 | } |
1146e682 | 14094 | else if (function_section (current_function_decl) != text_section) |
a3f97cbb | 14095 | { |
b3694847 | 14096 | dw_separate_line_info_ref line_info; |
2878ea73 | 14097 | targetm.asm_out.internal_label (asm_out_file, |
d5688810 GK |
14098 | SEPARATE_LINE_CODE_LABEL, |
14099 | separate_line_info_table_in_use); | |
e90b62db | 14100 | |
a1105617 | 14101 | /* Expand the line info table if necessary. */ |
e90b62db JM |
14102 | if (separate_line_info_table_in_use |
14103 | == separate_line_info_table_allocated) | |
14104 | { | |
14105 | separate_line_info_table_allocated += LINE_INFO_TABLE_INCREMENT; | |
14106 | separate_line_info_table | |
703ad42b | 14107 | = ggc_realloc (separate_line_info_table, |
17211ab5 GK |
14108 | separate_line_info_table_allocated |
14109 | * sizeof (dw_separate_line_info_entry)); | |
703ad42b KG |
14110 | memset (separate_line_info_table |
14111 | + separate_line_info_table_in_use, | |
17211ab5 | 14112 | 0, |
7080f735 | 14113 | (LINE_INFO_TABLE_INCREMENT |
17211ab5 | 14114 | * sizeof (dw_separate_line_info_entry))); |
e90b62db | 14115 | } |
71dfc51f RK |
14116 | |
14117 | /* Add the new entry at the end of the line_info_table. */ | |
e90b62db JM |
14118 | line_info |
14119 | = &separate_line_info_table[separate_line_info_table_in_use++]; | |
d5688810 | 14120 | line_info->dw_file_num = file_num; |
e90b62db | 14121 | line_info->dw_line_num = line; |
df696a75 | 14122 | line_info->function = current_function_funcdef_no; |
e90b62db JM |
14123 | } |
14124 | else | |
14125 | { | |
b3694847 | 14126 | dw_line_info_ref line_info; |
71dfc51f | 14127 | |
5fd9b178 | 14128 | targetm.asm_out.internal_label (asm_out_file, LINE_CODE_LABEL, |
5c90448c | 14129 | line_info_table_in_use); |
e90b62db | 14130 | |
71dfc51f | 14131 | /* Expand the line info table if necessary. */ |
e90b62db JM |
14132 | if (line_info_table_in_use == line_info_table_allocated) |
14133 | { | |
14134 | line_info_table_allocated += LINE_INFO_TABLE_INCREMENT; | |
14135 | line_info_table | |
17211ab5 GK |
14136 | = ggc_realloc (line_info_table, |
14137 | (line_info_table_allocated | |
14138 | * sizeof (dw_line_info_entry))); | |
14139 | memset (line_info_table + line_info_table_in_use, 0, | |
14140 | LINE_INFO_TABLE_INCREMENT * sizeof (dw_line_info_entry)); | |
e90b62db | 14141 | } |
71dfc51f RK |
14142 | |
14143 | /* Add the new entry at the end of the line_info_table. */ | |
e90b62db | 14144 | line_info = &line_info_table[line_info_table_in_use++]; |
d5688810 | 14145 | line_info->dw_file_num = file_num; |
e90b62db | 14146 | line_info->dw_line_num = line; |
a3f97cbb | 14147 | } |
a3f97cbb JW |
14148 | } |
14149 | } | |
14150 | ||
30f7a378 | 14151 | /* Record the beginning of a new source file. */ |
71dfc51f | 14152 | |
7f905405 | 14153 | static void |
7080f735 | 14154 | dwarf2out_start_source_file (unsigned int lineno, const char *filename) |
a3f97cbb | 14155 | { |
8a7a6f4d | 14156 | if (flag_eliminate_dwarf2_dups) |
881c6935 JM |
14157 | { |
14158 | /* Record the beginning of the file for break_out_includes. */ | |
cc0017a9 ZD |
14159 | dw_die_ref bincl_die; |
14160 | ||
14161 | bincl_die = new_die (DW_TAG_GNU_BINCL, comp_unit_die, NULL); | |
881c6935 JM |
14162 | add_AT_string (bincl_die, DW_AT_name, filename); |
14163 | } | |
2ad9852d | 14164 | |
84a5b4f8 DB |
14165 | if (debug_info_level >= DINFO_LEVEL_VERBOSE) |
14166 | { | |
d5688810 | 14167 | int file_num = maybe_emit_file (lookup_filename (filename)); |
5597a350 | 14168 | |
d6b5193b | 14169 | switch_to_section (debug_macinfo_section); |
84a5b4f8 | 14170 | dw2_asm_output_data (1, DW_MACINFO_start_file, "Start new file"); |
7c262518 RH |
14171 | dw2_asm_output_data_uleb128 (lineno, "Included from line number %d", |
14172 | lineno); | |
5597a350 | 14173 | |
d5688810 | 14174 | dw2_asm_output_data_uleb128 (file_num, "file %s", filename); |
84a5b4f8 | 14175 | } |
a3f97cbb JW |
14176 | } |
14177 | ||
cc260610 | 14178 | /* Record the end of a source file. */ |
71dfc51f | 14179 | |
7f905405 | 14180 | static void |
7080f735 | 14181 | dwarf2out_end_source_file (unsigned int lineno ATTRIBUTE_UNUSED) |
a3f97cbb | 14182 | { |
881c6935 | 14183 | if (flag_eliminate_dwarf2_dups) |
2ad9852d | 14184 | /* Record the end of the file for break_out_includes. */ |
54ba1f0d | 14185 | new_die (DW_TAG_GNU_EINCL, comp_unit_die, NULL); |
2ad9852d | 14186 | |
84a5b4f8 DB |
14187 | if (debug_info_level >= DINFO_LEVEL_VERBOSE) |
14188 | { | |
d6b5193b | 14189 | switch_to_section (debug_macinfo_section); |
84a5b4f8 DB |
14190 | dw2_asm_output_data (1, DW_MACINFO_end_file, "End file"); |
14191 | } | |
a3f97cbb JW |
14192 | } |
14193 | ||
cc260610 | 14194 | /* Called from debug_define in toplev.c. The `buffer' parameter contains |
a3f97cbb JW |
14195 | the tail part of the directive line, i.e. the part which is past the |
14196 | initial whitespace, #, whitespace, directive-name, whitespace part. */ | |
71dfc51f | 14197 | |
7f905405 | 14198 | static void |
7080f735 AJ |
14199 | dwarf2out_define (unsigned int lineno ATTRIBUTE_UNUSED, |
14200 | const char *buffer ATTRIBUTE_UNUSED) | |
a3f97cbb | 14201 | { |
84a5b4f8 DB |
14202 | if (debug_info_level >= DINFO_LEVEL_VERBOSE) |
14203 | { | |
d6b5193b | 14204 | switch_to_section (debug_macinfo_section); |
84a5b4f8 DB |
14205 | dw2_asm_output_data (1, DW_MACINFO_define, "Define macro"); |
14206 | dw2_asm_output_data_uleb128 (lineno, "At line number %d", lineno); | |
14207 | dw2_asm_output_nstring (buffer, -1, "The macro"); | |
14208 | } | |
a3f97cbb JW |
14209 | } |
14210 | ||
cc260610 | 14211 | /* Called from debug_undef in toplev.c. The `buffer' parameter contains |
a3f97cbb JW |
14212 | the tail part of the directive line, i.e. the part which is past the |
14213 | initial whitespace, #, whitespace, directive-name, whitespace part. */ | |
71dfc51f | 14214 | |
7f905405 | 14215 | static void |
7080f735 AJ |
14216 | dwarf2out_undef (unsigned int lineno ATTRIBUTE_UNUSED, |
14217 | const char *buffer ATTRIBUTE_UNUSED) | |
a3f97cbb | 14218 | { |
84a5b4f8 DB |
14219 | if (debug_info_level >= DINFO_LEVEL_VERBOSE) |
14220 | { | |
d6b5193b | 14221 | switch_to_section (debug_macinfo_section); |
84a5b4f8 DB |
14222 | dw2_asm_output_data (1, DW_MACINFO_undef, "Undefine macro"); |
14223 | dw2_asm_output_data_uleb128 (lineno, "At line number %d", lineno); | |
14224 | dw2_asm_output_nstring (buffer, -1, "The macro"); | |
14225 | } | |
a3f97cbb JW |
14226 | } |
14227 | ||
14228 | /* Set up for Dwarf output at the start of compilation. */ | |
71dfc51f | 14229 | |
a51d908e | 14230 | static void |
7080f735 | 14231 | dwarf2out_init (const char *filename ATTRIBUTE_UNUSED) |
a3f97cbb | 14232 | { |
d5688810 GK |
14233 | /* Allocate the file_table. */ |
14234 | file_table = htab_create_ggc (50, file_table_hash, | |
14235 | file_table_eq, NULL); | |
acc187f5 | 14236 | |
0a2d3d69 | 14237 | /* Allocate the decl_die_table. */ |
636c7bc4 JZ |
14238 | decl_die_table = htab_create_ggc (10, decl_die_table_hash, |
14239 | decl_die_table_eq, NULL); | |
0a2d3d69 DB |
14240 | |
14241 | /* Allocate the decl_loc_table. */ | |
14242 | decl_loc_table = htab_create_ggc (10, decl_loc_table_hash, | |
14243 | decl_loc_table_eq, NULL); | |
a3f97cbb JW |
14244 | |
14245 | /* Allocate the initial hunk of the decl_scope_table. */ | |
0fdc587b | 14246 | decl_scope_table = VEC_alloc (tree, gc, 256); |
a3f97cbb JW |
14247 | |
14248 | /* Allocate the initial hunk of the abbrev_die_table. */ | |
17211ab5 GK |
14249 | abbrev_die_table = ggc_alloc_cleared (ABBREV_DIE_TABLE_INCREMENT |
14250 | * sizeof (dw_die_ref)); | |
a3f97cbb | 14251 | abbrev_die_table_allocated = ABBREV_DIE_TABLE_INCREMENT; |
ea4b7848 | 14252 | /* Zero-th entry is allocated, but unused. */ |
a3f97cbb JW |
14253 | abbrev_die_table_in_use = 1; |
14254 | ||
14255 | /* Allocate the initial hunk of the line_info_table. */ | |
17211ab5 GK |
14256 | line_info_table = ggc_alloc_cleared (LINE_INFO_TABLE_INCREMENT |
14257 | * sizeof (dw_line_info_entry)); | |
a3f97cbb | 14258 | line_info_table_allocated = LINE_INFO_TABLE_INCREMENT; |
2ad9852d | 14259 | |
ea4b7848 | 14260 | /* Zero-th entry is allocated, but unused. */ |
a3f97cbb JW |
14261 | line_info_table_in_use = 1; |
14262 | ||
89708594 CT |
14263 | /* Allocate the pubtypes and pubnames vectors. */ |
14264 | pubname_table = VEC_alloc (pubname_entry, gc, 32); | |
14265 | pubtype_table = VEC_alloc (pubname_entry, gc, 32); | |
14266 | ||
556273e0 | 14267 | /* Generate the initial DIE for the .debug section. Note that the (string) |
a3f97cbb | 14268 | value given in the DW_AT_name attribute of the DW_TAG_compile_unit DIE |
556273e0 | 14269 | will (typically) be a relative pathname and that this pathname should be |
a3f97cbb | 14270 | taken as being relative to the directory from which the compiler was |
c4274b22 RH |
14271 | invoked when the given (base) source file was compiled. We will fill |
14272 | in this value in dwarf2out_finish. */ | |
14273 | comp_unit_die = gen_compile_unit_die (NULL); | |
a3f97cbb | 14274 | |
887fb69b | 14275 | incomplete_types = VEC_alloc (tree, gc, 64); |
244a4af0 | 14276 | |
a1bbd445 | 14277 | used_rtx_array = VEC_alloc (rtx, gc, 32); |
1865dbb5 | 14278 | |
d6b5193b RS |
14279 | debug_info_section = get_section (DEBUG_INFO_SECTION, |
14280 | SECTION_DEBUG, NULL); | |
14281 | debug_abbrev_section = get_section (DEBUG_ABBREV_SECTION, | |
14282 | SECTION_DEBUG, NULL); | |
14283 | debug_aranges_section = get_section (DEBUG_ARANGES_SECTION, | |
14284 | SECTION_DEBUG, NULL); | |
14285 | debug_macinfo_section = get_section (DEBUG_MACINFO_SECTION, | |
14286 | SECTION_DEBUG, NULL); | |
14287 | debug_line_section = get_section (DEBUG_LINE_SECTION, | |
14288 | SECTION_DEBUG, NULL); | |
14289 | debug_loc_section = get_section (DEBUG_LOC_SECTION, | |
14290 | SECTION_DEBUG, NULL); | |
14291 | debug_pubnames_section = get_section (DEBUG_PUBNAMES_SECTION, | |
14292 | SECTION_DEBUG, NULL); | |
89708594 CT |
14293 | #ifdef DEBUG_PUBTYPES_SECTION |
14294 | debug_pubtypes_section = get_section (DEBUG_PUBTYPES_SECTION, | |
14295 | SECTION_DEBUG, NULL); | |
14296 | #endif | |
d6b5193b RS |
14297 | debug_str_section = get_section (DEBUG_STR_SECTION, |
14298 | DEBUG_STR_SECTION_FLAGS, NULL); | |
14299 | debug_ranges_section = get_section (DEBUG_RANGES_SECTION, | |
14300 | SECTION_DEBUG, NULL); | |
192d0f89 GK |
14301 | debug_frame_section = get_section (DEBUG_FRAME_SECTION, |
14302 | SECTION_DEBUG, NULL); | |
d6b5193b | 14303 | |
5c90448c | 14304 | ASM_GENERATE_INTERNAL_LABEL (text_end_label, TEXT_END_LABEL, 0); |
9d2f2c45 RH |
14305 | ASM_GENERATE_INTERNAL_LABEL (abbrev_section_label, |
14306 | DEBUG_ABBREV_SECTION_LABEL, 0); | |
9e749a8b | 14307 | ASM_GENERATE_INTERNAL_LABEL (text_section_label, TEXT_SECTION_LABEL, 0); |
2878ea73 | 14308 | ASM_GENERATE_INTERNAL_LABEL (cold_text_section_label, |
c7466dee CT |
14309 | COLD_TEXT_SECTION_LABEL, 0); |
14310 | ASM_GENERATE_INTERNAL_LABEL (cold_end_label, COLD_END_LABEL, 0); | |
2ad9852d | 14311 | |
556273e0 | 14312 | ASM_GENERATE_INTERNAL_LABEL (debug_info_section_label, |
8b790721 | 14313 | DEBUG_INFO_SECTION_LABEL, 0); |
556273e0 | 14314 | ASM_GENERATE_INTERNAL_LABEL (debug_line_section_label, |
8b790721 | 14315 | DEBUG_LINE_SECTION_LABEL, 0); |
2bee6045 JJ |
14316 | ASM_GENERATE_INTERNAL_LABEL (ranges_section_label, |
14317 | DEBUG_RANGES_SECTION_LABEL, 0); | |
d6b5193b | 14318 | switch_to_section (debug_abbrev_section); |
8b790721 | 14319 | ASM_OUTPUT_LABEL (asm_out_file, abbrev_section_label); |
d6b5193b | 14320 | switch_to_section (debug_info_section); |
8b790721 | 14321 | ASM_OUTPUT_LABEL (asm_out_file, debug_info_section_label); |
d6b5193b | 14322 | switch_to_section (debug_line_section); |
8b790721 | 14323 | ASM_OUTPUT_LABEL (asm_out_file, debug_line_section_label); |
2ad9852d | 14324 | |
84a5b4f8 DB |
14325 | if (debug_info_level >= DINFO_LEVEL_VERBOSE) |
14326 | { | |
d6b5193b | 14327 | switch_to_section (debug_macinfo_section); |
84a5b4f8 DB |
14328 | ASM_GENERATE_INTERNAL_LABEL (macinfo_section_label, |
14329 | DEBUG_MACINFO_SECTION_LABEL, 0); | |
14330 | ASM_OUTPUT_LABEL (asm_out_file, macinfo_section_label); | |
14331 | } | |
7c262518 | 14332 | |
d6b5193b | 14333 | switch_to_section (text_section); |
9e749a8b | 14334 | ASM_OUTPUT_LABEL (asm_out_file, text_section_label); |
c7466dee CT |
14335 | if (flag_reorder_blocks_and_partition) |
14336 | { | |
c543ca49 | 14337 | switch_to_section (unlikely_text_section ()); |
c7466dee CT |
14338 | ASM_OUTPUT_LABEL (asm_out_file, cold_text_section_label); |
14339 | } | |
a3f97cbb JW |
14340 | } |
14341 | ||
9eb4015a JJ |
14342 | /* A helper function for dwarf2out_finish called through |
14343 | ht_forall. Emit one queued .debug_str string. */ | |
14344 | ||
14345 | static int | |
7080f735 | 14346 | output_indirect_string (void **h, void *v ATTRIBUTE_UNUSED) |
9eb4015a | 14347 | { |
17211ab5 | 14348 | struct indirect_string_node *node = (struct indirect_string_node *) *h; |
9eb4015a | 14349 | |
9eb4015a JJ |
14350 | if (node->form == DW_FORM_strp) |
14351 | { | |
d6b5193b | 14352 | switch_to_section (debug_str_section); |
9eb4015a | 14353 | ASM_OUTPUT_LABEL (asm_out_file, node->label); |
17211ab5 | 14354 | assemble_string (node->str, strlen (node->str) + 1); |
9eb4015a | 14355 | } |
2ad9852d | 14356 | |
9eb4015a JJ |
14357 | return 1; |
14358 | } | |
14359 | ||
6f8d8ef0 GK |
14360 | #if ENABLE_ASSERT_CHECKING |
14361 | /* Verify that all marks are clear. */ | |
73c68f61 | 14362 | |
6f8d8ef0 GK |
14363 | static void |
14364 | verify_marks_clear (dw_die_ref die) | |
14365 | { | |
14366 | dw_die_ref c; | |
2878ea73 | 14367 | |
6f8d8ef0 GK |
14368 | gcc_assert (! die->die_mark); |
14369 | FOR_EACH_CHILD (die, c, verify_marks_clear (c)); | |
14370 | } | |
14371 | #endif /* ENABLE_ASSERT_CHECKING */ | |
73c68f61 SS |
14372 | |
14373 | /* Clear the marks for a die and its children. | |
3dc575ff | 14374 | Be cool if the mark isn't set. */ |
73c68f61 SS |
14375 | |
14376 | static void | |
7080f735 | 14377 | prune_unmark_dies (dw_die_ref die) |
73c68f61 SS |
14378 | { |
14379 | dw_die_ref c; | |
2878ea73 | 14380 | |
d6eeb3ba GK |
14381 | if (die->die_mark) |
14382 | die->die_mark = 0; | |
14383 | FOR_EACH_CHILD (die, c, prune_unmark_dies (c)); | |
73c68f61 SS |
14384 | } |
14385 | ||
73c68f61 SS |
14386 | /* Given DIE that we're marking as used, find any other dies |
14387 | it references as attributes and mark them as used. */ | |
14388 | ||
14389 | static void | |
7080f735 | 14390 | prune_unused_types_walk_attribs (dw_die_ref die) |
73c68f61 SS |
14391 | { |
14392 | dw_attr_ref a; | |
1a27722f | 14393 | unsigned ix; |
73c68f61 | 14394 | |
1a27722f | 14395 | for (ix = 0; VEC_iterate (dw_attr_node, die->die_attr, ix, a); ix++) |
73c68f61 SS |
14396 | { |
14397 | if (a->dw_attr_val.val_class == dw_val_class_die_ref) | |
14398 | { | |
14399 | /* A reference to another DIE. | |
14400 | Make sure that it will get emitted. */ | |
14401 | prune_unused_types_mark (a->dw_attr_val.v.val_die_ref.die, 1); | |
14402 | } | |
e26303c2 GK |
14403 | /* Set the string's refcount to 0 so that prune_unused_types_mark |
14404 | accounts properly for it. */ | |
14405 | if (AT_class (a) == dw_val_class_str) | |
14406 | a->dw_attr_val.v.val_str->refcount = 0; | |
73c68f61 SS |
14407 | } |
14408 | } | |
14409 | ||
14410 | ||
14411 | /* Mark DIE as being used. If DOKIDS is true, then walk down | |
14412 | to DIE's children. */ | |
14413 | ||
14414 | static void | |
7080f735 | 14415 | prune_unused_types_mark (dw_die_ref die, int dokids) |
73c68f61 SS |
14416 | { |
14417 | dw_die_ref c; | |
14418 | ||
14419 | if (die->die_mark == 0) | |
14420 | { | |
14421 | /* We haven't done this node yet. Mark it as used. */ | |
14422 | die->die_mark = 1; | |
14423 | ||
14424 | /* We also have to mark its parents as used. | |
14425 | (But we don't want to mark our parents' kids due to this.) */ | |
14426 | if (die->die_parent) | |
14427 | prune_unused_types_mark (die->die_parent, 0); | |
14428 | ||
14429 | /* Mark any referenced nodes. */ | |
14430 | prune_unused_types_walk_attribs (die); | |
47fcfa7b SS |
14431 | |
14432 | /* If this node is a specification, | |
2878ea73 | 14433 | also mark the definition, if it exists. */ |
47fcfa7b | 14434 | if (get_AT_flag (die, DW_AT_declaration) && die->die_definition) |
2878ea73 | 14435 | prune_unused_types_mark (die->die_definition, 1); |
73c68f61 SS |
14436 | } |
14437 | ||
14438 | if (dokids && die->die_mark != 2) | |
14439 | { | |
14440 | /* We need to walk the children, but haven't done so yet. | |
14441 | Remember that we've walked the kids. */ | |
14442 | die->die_mark = 2; | |
14443 | ||
d6eeb3ba GK |
14444 | /* If this is an array type, we need to make sure our |
14445 | kids get marked, even if they're types. */ | |
14446 | if (die->die_tag == DW_TAG_array_type) | |
14447 | FOR_EACH_CHILD (die, c, prune_unused_types_mark (c, 1)); | |
14448 | else | |
14449 | FOR_EACH_CHILD (die, c, prune_unused_types_walk (c)); | |
73c68f61 SS |
14450 | } |
14451 | } | |
14452 | ||
14453 | ||
14454 | /* Walk the tree DIE and mark types that we actually use. */ | |
14455 | ||
14456 | static void | |
7080f735 | 14457 | prune_unused_types_walk (dw_die_ref die) |
73c68f61 SS |
14458 | { |
14459 | dw_die_ref c; | |
14460 | ||
14461 | /* Don't do anything if this node is already marked. */ | |
14462 | if (die->die_mark) | |
14463 | return; | |
14464 | ||
428aba16 RS |
14465 | switch (die->die_tag) |
14466 | { | |
14467 | case DW_TAG_const_type: | |
14468 | case DW_TAG_packed_type: | |
14469 | case DW_TAG_pointer_type: | |
14470 | case DW_TAG_reference_type: | |
14471 | case DW_TAG_volatile_type: | |
14472 | case DW_TAG_typedef: | |
14473 | case DW_TAG_array_type: | |
14474 | case DW_TAG_structure_type: | |
14475 | case DW_TAG_union_type: | |
14476 | case DW_TAG_class_type: | |
14477 | case DW_TAG_friend: | |
14478 | case DW_TAG_variant_part: | |
14479 | case DW_TAG_enumeration_type: | |
14480 | case DW_TAG_subroutine_type: | |
14481 | case DW_TAG_string_type: | |
14482 | case DW_TAG_set_type: | |
14483 | case DW_TAG_subrange_type: | |
14484 | case DW_TAG_ptr_to_member_type: | |
14485 | case DW_TAG_file_type: | |
14486 | if (die->die_perennial_p) | |
14487 | break; | |
33c9159e | 14488 | |
428aba16 RS |
14489 | /* It's a type node --- don't mark it. */ |
14490 | return; | |
73c68f61 | 14491 | |
428aba16 RS |
14492 | default: |
14493 | /* Mark everything else. */ | |
14494 | break; | |
73c68f61 SS |
14495 | } |
14496 | ||
14497 | die->die_mark = 1; | |
14498 | ||
14499 | /* Now, mark any dies referenced from here. */ | |
14500 | prune_unused_types_walk_attribs (die); | |
14501 | ||
14502 | /* Mark children. */ | |
d6eeb3ba | 14503 | FOR_EACH_CHILD (die, c, prune_unused_types_walk (c)); |
73c68f61 SS |
14504 | } |
14505 | ||
e26303c2 GK |
14506 | /* Increment the string counts on strings referred to from DIE's |
14507 | attributes. */ | |
14508 | ||
14509 | static void | |
14510 | prune_unused_types_update_strings (dw_die_ref die) | |
14511 | { | |
14512 | dw_attr_ref a; | |
14513 | unsigned ix; | |
14514 | ||
14515 | for (ix = 0; VEC_iterate (dw_attr_node, die->die_attr, ix, a); ix++) | |
14516 | if (AT_class (a) == dw_val_class_str) | |
14517 | { | |
14518 | struct indirect_string_node *s = a->dw_attr_val.v.val_str; | |
14519 | s->refcount++; | |
14520 | /* Avoid unnecessarily putting strings that are used less than | |
14521 | twice in the hash table. */ | |
76f7a74f GK |
14522 | if (s->refcount |
14523 | == ((DEBUG_STR_SECTION_FLAGS & SECTION_MERGE) ? 1 : 2)) | |
e26303c2 GK |
14524 | { |
14525 | void ** slot; | |
14526 | slot = htab_find_slot_with_hash (debug_str_hash, s->str, | |
14527 | htab_hash_string (s->str), | |
14528 | INSERT); | |
14529 | gcc_assert (*slot == NULL); | |
14530 | *slot = s; | |
14531 | } | |
14532 | } | |
14533 | } | |
73c68f61 SS |
14534 | |
14535 | /* Remove from the tree DIE any dies that aren't marked. */ | |
14536 | ||
14537 | static void | |
7080f735 | 14538 | prune_unused_types_prune (dw_die_ref die) |
73c68f61 | 14539 | { |
d6eeb3ba | 14540 | dw_die_ref c; |
a1c496cb | 14541 | |
ced3f397 | 14542 | gcc_assert (die->die_mark); |
19450f2b | 14543 | prune_unused_types_update_strings (die); |
73c68f61 | 14544 | |
d6eeb3ba GK |
14545 | if (! die->die_child) |
14546 | return; | |
2878ea73 | 14547 | |
d6eeb3ba GK |
14548 | c = die->die_child; |
14549 | do { | |
14550 | dw_die_ref prev = c; | |
14551 | for (c = c->die_sib; ! c->die_mark; c = c->die_sib) | |
14552 | if (c == die->die_child) | |
73c68f61 | 14553 | { |
d6eeb3ba GK |
14554 | /* No marked children between 'prev' and the end of the list. */ |
14555 | if (prev == c) | |
14556 | /* No marked children at all. */ | |
14557 | die->die_child = NULL; | |
14558 | else | |
14559 | { | |
14560 | prev->die_sib = c->die_sib; | |
14561 | die->die_child = prev; | |
14562 | } | |
14563 | return; | |
73c68f61 | 14564 | } |
d6eeb3ba GK |
14565 | |
14566 | if (c != prev->die_sib) | |
14567 | prev->die_sib = c; | |
d6eeb3ba GK |
14568 | prune_unused_types_prune (c); |
14569 | } while (c != die->die_child); | |
73c68f61 SS |
14570 | } |
14571 | ||
14572 | ||
14573 | /* Remove dies representing declarations that we never use. */ | |
14574 | ||
14575 | static void | |
7080f735 | 14576 | prune_unused_types (void) |
73c68f61 SS |
14577 | { |
14578 | unsigned int i; | |
14579 | limbo_die_node *node; | |
89708594 | 14580 | pubname_ref pub; |
73c68f61 | 14581 | |
6f8d8ef0 GK |
14582 | #if ENABLE_ASSERT_CHECKING |
14583 | /* All the marks should already be clear. */ | |
14584 | verify_marks_clear (comp_unit_die); | |
73c68f61 | 14585 | for (node = limbo_die_list; node; node = node->next) |
6f8d8ef0 GK |
14586 | verify_marks_clear (node->die); |
14587 | #endif /* ENABLE_ASSERT_CHECKING */ | |
73c68f61 SS |
14588 | |
14589 | /* Set the mark on nodes that are actually used. */ | |
14590 | prune_unused_types_walk (comp_unit_die); | |
14591 | for (node = limbo_die_list; node; node = node->next) | |
14592 | prune_unused_types_walk (node->die); | |
14593 | ||
14594 | /* Also set the mark on nodes referenced from the | |
14595 | pubname_table or arange_table. */ | |
89708594 CT |
14596 | for (i = 0; VEC_iterate (pubname_entry, pubname_table, i, pub); i++) |
14597 | prune_unused_types_mark (pub->die, 1); | |
6a87d634 RS |
14598 | for (i = 0; i < arange_table_in_use; i++) |
14599 | prune_unused_types_mark (arange_table[i], 1); | |
73c68f61 | 14600 | |
e26303c2 GK |
14601 | /* Get rid of nodes that aren't marked; and update the string counts. */ |
14602 | if (debug_str_hash) | |
14603 | htab_empty (debug_str_hash); | |
73c68f61 SS |
14604 | prune_unused_types_prune (comp_unit_die); |
14605 | for (node = limbo_die_list; node; node = node->next) | |
14606 | prune_unused_types_prune (node->die); | |
14607 | ||
14608 | /* Leave the marks clear. */ | |
14609 | prune_unmark_dies (comp_unit_die); | |
14610 | for (node = limbo_die_list; node; node = node->next) | |
14611 | prune_unmark_dies (node->die); | |
14612 | } | |
14613 | ||
d5688810 GK |
14614 | /* Set the parameter to true if there are any relative pathnames in |
14615 | the file table. */ | |
14616 | static int | |
14617 | file_table_relative_p (void ** slot, void *param) | |
14618 | { | |
14619 | bool *p = param; | |
14620 | struct dwarf_file_data *d = *slot; | |
1d2c2b96 | 14621 | if (d->emitted_number && !IS_ABSOLUTE_PATH (d->filename)) |
d5688810 GK |
14622 | { |
14623 | *p = true; | |
14624 | return 0; | |
14625 | } | |
14626 | return 1; | |
14627 | } | |
14628 | ||
a3f97cbb JW |
14629 | /* Output stuff that dwarf requires at the end of every file, |
14630 | and generate the DWARF-2 debugging info. */ | |
71dfc51f | 14631 | |
a51d908e | 14632 | static void |
7080f735 | 14633 | dwarf2out_finish (const char *filename) |
a3f97cbb | 14634 | { |
ef76d03b | 14635 | limbo_die_node *node, *next_node; |
ae0ed63a | 14636 | dw_die_ref die = 0; |
ef76d03b | 14637 | |
c4274b22 RH |
14638 | /* Add the name for the main input file now. We delayed this from |
14639 | dwarf2out_init to avoid complications with PCH. */ | |
3b895f8e | 14640 | add_name_attribute (comp_unit_die, filename); |
1d2c2b96 | 14641 | if (!IS_ABSOLUTE_PATH (filename)) |
c4274b22 | 14642 | add_comp_dir_attribute (comp_unit_die); |
79c758fb JJ |
14643 | else if (get_AT (comp_unit_die, DW_AT_comp_dir) == NULL) |
14644 | { | |
d5688810 GK |
14645 | bool p = false; |
14646 | htab_traverse (file_table, file_table_relative_p, &p); | |
14647 | if (p) | |
14648 | add_comp_dir_attribute (comp_unit_die); | |
79c758fb | 14649 | } |
c4274b22 | 14650 | |
ef76d03b JW |
14651 | /* Traverse the limbo die list, and add parent/child links. The only |
14652 | dies without parents that should be here are concrete instances of | |
14653 | inline functions, and the comp_unit_die. We can ignore the comp_unit_die. | |
14654 | For concrete instances, we can get the parent die from the abstract | |
14655 | instance. */ | |
14656 | for (node = limbo_die_list; node; node = next_node) | |
14657 | { | |
14658 | next_node = node->next; | |
14659 | die = node->die; | |
14660 | ||
14661 | if (die->die_parent == NULL) | |
14662 | { | |
a96c67ec | 14663 | dw_die_ref origin = get_AT_ref (die, DW_AT_abstract_origin); |
2ad9852d | 14664 | |
a96c67ec JM |
14665 | if (origin) |
14666 | add_child_die (origin->die_parent, die); | |
ef76d03b | 14667 | else if (die == comp_unit_die) |
a96c67ec | 14668 | ; |
6bb28965 JM |
14669 | else if (errorcount > 0 || sorrycount > 0) |
14670 | /* It's OK to be confused by errors in the input. */ | |
14671 | add_child_die (comp_unit_die, die); | |
ced3f397 | 14672 | else |
54ba1f0d RH |
14673 | { |
14674 | /* In certain situations, the lexical block containing a | |
14675 | nested function can be optimized away, which results | |
14676 | in the nested function die being orphaned. Likewise | |
14677 | with the return type of that nested function. Force | |
60108d34 JH |
14678 | this to be a child of the containing function. |
14679 | ||
14680 | It may happen that even the containing function got fully | |
14681 | inlined and optimized out. In that case we are lost and | |
14682 | assign the empty child. This should not be big issue as | |
14683 | the function is likely unreachable too. */ | |
ced3f397 NS |
14684 | tree context = NULL_TREE; |
14685 | ||
14686 | gcc_assert (node->created_for); | |
14687 | ||
14688 | if (DECL_P (node->created_for)) | |
14689 | context = DECL_CONTEXT (node->created_for); | |
14690 | else if (TYPE_P (node->created_for)) | |
14691 | context = TYPE_CONTEXT (node->created_for); | |
a1c496cb | 14692 | |
db9e0d2a AO |
14693 | gcc_assert (context |
14694 | && (TREE_CODE (context) == FUNCTION_DECL | |
14695 | || TREE_CODE (context) == NAMESPACE_DECL)); | |
a1c496cb | 14696 | |
54ba1f0d | 14697 | origin = lookup_decl_die (context); |
60108d34 JH |
14698 | if (origin) |
14699 | add_child_die (origin, die); | |
1168d30f JH |
14700 | else |
14701 | add_child_die (comp_unit_die, die); | |
54ba1f0d | 14702 | } |
ef76d03b | 14703 | } |
ef76d03b | 14704 | } |
2ad9852d | 14705 | |
a96c67ec | 14706 | limbo_die_list = NULL; |
ef76d03b | 14707 | |
8a8c3656 JM |
14708 | /* Walk through the list of incomplete types again, trying once more to |
14709 | emit full debugging info for them. */ | |
14710 | retry_incomplete_types (); | |
14711 | ||
03275f81 ZD |
14712 | if (flag_eliminate_unused_debug_types) |
14713 | prune_unused_types (); | |
14714 | ||
881c6935 JM |
14715 | /* Generate separate CUs for each of the include files we've seen. |
14716 | They will go into limbo_die_list. */ | |
5f632b5e JM |
14717 | if (flag_eliminate_dwarf2_dups) |
14718 | break_out_includes (comp_unit_die); | |
881c6935 JM |
14719 | |
14720 | /* Traverse the DIE's and add add sibling attributes to those DIE's | |
14721 | that have children. */ | |
a3f97cbb | 14722 | add_sibling_attributes (comp_unit_die); |
881c6935 JM |
14723 | for (node = limbo_die_list; node; node = node->next) |
14724 | add_sibling_attributes (node->die); | |
a3f97cbb JW |
14725 | |
14726 | /* Output a terminator label for the .text section. */ | |
d6b5193b | 14727 | switch_to_section (text_section); |
5fd9b178 | 14728 | targetm.asm_out.internal_label (asm_out_file, TEXT_END_LABEL, 0); |
c7466dee CT |
14729 | if (flag_reorder_blocks_and_partition) |
14730 | { | |
c543ca49 | 14731 | switch_to_section (unlikely_text_section ()); |
c7466dee CT |
14732 | targetm.asm_out.internal_label (asm_out_file, COLD_END_LABEL, 0); |
14733 | } | |
a3f97cbb | 14734 | |
db3c0315 MM |
14735 | /* We can only use the low/high_pc attributes if all of the code was |
14736 | in .text. */ | |
1146e682 | 14737 | if (!have_multiple_function_sections) |
db3c0315 MM |
14738 | { |
14739 | add_AT_lbl_id (comp_unit_die, DW_AT_low_pc, text_section_label); | |
14740 | add_AT_lbl_id (comp_unit_die, DW_AT_high_pc, text_end_label); | |
e90b62db | 14741 | } |
2ad9852d | 14742 | |
0435c1d5 AO |
14743 | else |
14744 | { | |
14745 | unsigned fde_idx = 0; | |
14746 | ||
14747 | /* We need to give .debug_loc and .debug_ranges an appropriate | |
14748 | "base address". Use zero so that these addresses become | |
14749 | absolute. Historically, we've emitted the unexpected | |
14750 | DW_AT_entry_pc instead of DW_AT_low_pc for this purpose. | |
14751 | Emit both to give time for other tools to adapt. */ | |
14752 | add_AT_addr (comp_unit_die, DW_AT_low_pc, const0_rtx); | |
14753 | add_AT_addr (comp_unit_die, DW_AT_entry_pc, const0_rtx); | |
14754 | ||
14755 | add_AT_range_list (comp_unit_die, DW_AT_ranges, | |
14756 | add_ranges_by_labels (text_section_label, | |
14757 | text_end_label)); | |
14758 | if (flag_reorder_blocks_and_partition) | |
14759 | add_ranges_by_labels (cold_text_section_label, | |
14760 | cold_end_label); | |
14761 | ||
14762 | for (fde_idx = 0; fde_idx < fde_table_in_use; fde_idx++) | |
14763 | { | |
14764 | dw_fde_ref fde = &fde_table[fde_idx]; | |
14765 | ||
14766 | if (fde->dw_fde_switched_sections) | |
14767 | { | |
14768 | add_ranges_by_labels (fde->dw_fde_hot_section_label, | |
14769 | fde->dw_fde_hot_section_end_label); | |
14770 | add_ranges_by_labels (fde->dw_fde_unlikely_section_label, | |
14771 | fde->dw_fde_unlikely_section_end_label); | |
14772 | } | |
14773 | else | |
14774 | add_ranges_by_labels (fde->dw_fde_begin, | |
14775 | fde->dw_fde_end); | |
14776 | } | |
14777 | ||
14778 | add_ranges (NULL); | |
14779 | } | |
e90b62db | 14780 | |
1146e682 GK |
14781 | /* Output location list section if necessary. */ |
14782 | if (have_location_lists) | |
14783 | { | |
14784 | /* Output the location lists info. */ | |
14785 | switch_to_section (debug_loc_section); | |
14786 | ASM_GENERATE_INTERNAL_LABEL (loc_section_label, | |
14787 | DEBUG_LOC_SECTION_LABEL, 0); | |
14788 | ASM_OUTPUT_LABEL (asm_out_file, loc_section_label); | |
14789 | output_location_lists (die); | |
14790 | } | |
14791 | ||
fe7cd37f | 14792 | if (debug_info_level >= DINFO_LEVEL_NORMAL) |
192d0f89 GK |
14793 | add_AT_lineptr (comp_unit_die, DW_AT_stmt_list, |
14794 | debug_line_section_label); | |
db3c0315 | 14795 | |
84a5b4f8 | 14796 | if (debug_info_level >= DINFO_LEVEL_VERBOSE) |
192d0f89 | 14797 | add_AT_macptr (comp_unit_die, DW_AT_macro_info, macinfo_section_label); |
a96c67ec | 14798 | |
881c6935 JM |
14799 | /* Output all of the compilation units. We put the main one last so that |
14800 | the offsets are available to output_pubnames. */ | |
14801 | for (node = limbo_die_list; node; node = node->next) | |
cc0017a9 | 14802 | output_comp_unit (node->die, 0); |
2ad9852d | 14803 | |
cc0017a9 | 14804 | output_comp_unit (comp_unit_die, 0); |
881c6935 | 14805 | |
a3f97cbb | 14806 | /* Output the abbreviation table. */ |
d6b5193b | 14807 | switch_to_section (debug_abbrev_section); |
a3f97cbb JW |
14808 | output_abbrev_section (); |
14809 | ||
2ad9852d | 14810 | /* Output public names table if necessary. */ |
89708594 | 14811 | if (!VEC_empty (pubname_entry, pubname_table)) |
d291dd49 | 14812 | { |
d6b5193b | 14813 | switch_to_section (debug_pubnames_section); |
89708594 | 14814 | output_pubnames (pubname_table); |
d291dd49 JM |
14815 | } |
14816 | ||
89708594 CT |
14817 | #ifdef DEBUG_PUBTYPES_SECTION |
14818 | /* Output public types table if necessary. */ | |
14819 | if (!VEC_empty (pubname_entry, pubtype_table)) | |
14820 | { | |
14821 | switch_to_section (debug_pubtypes_section); | |
14822 | output_pubnames (pubtype_table); | |
14823 | } | |
14824 | #endif | |
2878ea73 | 14825 | |
2ad9852d RK |
14826 | /* Output the address range information. We only put functions in the arange |
14827 | table, so don't write it out if we don't have any. */ | |
a3f97cbb JW |
14828 | if (fde_table_in_use) |
14829 | { | |
d6b5193b | 14830 | switch_to_section (debug_aranges_section); |
a3f97cbb JW |
14831 | output_aranges (); |
14832 | } | |
a20612aa | 14833 | |
a20612aa RH |
14834 | /* Output ranges section if necessary. */ |
14835 | if (ranges_table_in_use) | |
14836 | { | |
d6b5193b | 14837 | switch_to_section (debug_ranges_section); |
2bee6045 | 14838 | ASM_OUTPUT_LABEL (asm_out_file, ranges_section_label); |
a20612aa RH |
14839 | output_ranges (); |
14840 | } | |
14841 | ||
d5688810 GK |
14842 | /* Output the source line correspondence table. We must do this |
14843 | even if there is no line information. Otherwise, on an empty | |
14844 | translation unit, we will generate a present, but empty, | |
14845 | .debug_info section. IRIX 6.5 `nm' will then complain when | |
14846 | examining the file. This is done late so that any filenames | |
14847 | used by the debug_info section are marked as 'used'. */ | |
14848 | if (! DWARF2_ASM_LINE_DEBUG_INFO) | |
14849 | { | |
14850 | switch_to_section (debug_line_section); | |
14851 | output_line_info (); | |
14852 | } | |
14853 | ||
3c0d1020 | 14854 | /* Have to end the macro section. */ |
cc260610 | 14855 | if (debug_info_level >= DINFO_LEVEL_VERBOSE) |
c26fbbca | 14856 | { |
d6b5193b | 14857 | switch_to_section (debug_macinfo_section); |
2f8d482e | 14858 | dw2_asm_output_data (1, 0, "End compilation unit"); |
cc260610 | 14859 | } |
9eb4015a | 14860 | |
2ad9852d | 14861 | /* If we emitted any DW_FORM_strp form attribute, output the string |
9eb4015a JJ |
14862 | table too. */ |
14863 | if (debug_str_hash) | |
17211ab5 | 14864 | htab_traverse (debug_str_hash, output_indirect_string, NULL); |
a3f97cbb | 14865 | } |
e2500fed GK |
14866 | #else |
14867 | ||
14868 | /* This should never be used, but its address is needed for comparisons. */ | |
14869 | const struct gcc_debug_hooks dwarf2_debug_hooks; | |
14870 | ||
14871 | #endif /* DWARF2_DEBUGGING_INFO */ | |
14872 | ||
14873 | #include "gt-dwarf2out.h" |