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ca29da43 | 1 | /* Read and write coverage files, and associated functionality. |
d1e082c2 | 2 | Copyright (C) 1990-2013 Free Software Foundation, Inc. |
ca29da43 NS |
3 | Contributed by James E. Wilson, UC Berkeley/Cygnus Support; |
4 | based on some ideas from Dain Samples of UC Berkeley. | |
5 | Further mangling by Bob Manson, Cygnus Support. | |
6 | Further mangled by Nathan Sidwell, CodeSourcery | |
7 | ||
8 | This file is part of GCC. | |
9 | ||
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 | |
9dcd6f09 | 12 | Software Foundation; either version 3, or (at your option) any later |
ca29da43 NS |
13 | version. |
14 | ||
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. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
9dcd6f09 NC |
21 | along with GCC; see the file COPYING3. If not see |
22 | <http://www.gnu.org/licenses/>. */ | |
ca29da43 NS |
23 | |
24 | ||
25 | #define GCOV_LINKAGE | |
26 | ||
27 | #include "config.h" | |
28 | #include "system.h" | |
29 | #include "coretypes.h" | |
30 | #include "tm.h" | |
31 | #include "rtl.h" | |
32 | #include "tree.h" | |
d8a2d370 DN |
33 | #include "stringpool.h" |
34 | #include "stor-layout.h" | |
ca29da43 NS |
35 | #include "flags.h" |
36 | #include "output.h" | |
37 | #include "regs.h" | |
38 | #include "expr.h" | |
39 | #include "function.h" | |
2d1a4cc1 | 40 | #include "basic-block.h" |
ca29da43 | 41 | #include "toplev.h" |
5773a50f | 42 | #include "tm_p.h" |
ca29da43 | 43 | #include "ggc.h" |
ca29da43 | 44 | #include "coverage.h" |
ca29da43 | 45 | #include "langhooks.h" |
0823efed | 46 | #include "hash-table.h" |
c9b9aa64 | 47 | #include "tree-iterator.h" |
103ff0d6 TJ |
48 | #include "context.h" |
49 | #include "pass_manager.h" | |
50 | #include "tree-pass.h" | |
c9b9aa64 | 51 | #include "cgraph.h" |
7ee2468b | 52 | #include "dumpfile.h" |
1da2ed5f | 53 | #include "diagnostic-core.h" |
650cfcab | 54 | #include "intl.h" |
ba78087b | 55 | #include "filenames.h" |
9e66e106 | 56 | #include "target.h" |
ca29da43 | 57 | |
10adac51 | 58 | #include "gcov-io.h" |
ca29da43 NS |
59 | #include "gcov-io.c" |
60 | ||
b724567e | 61 | struct GTY((chain_next ("%h.next"))) coverage_data |
ca29da43 | 62 | { |
b724567e | 63 | struct coverage_data *next; /* next function */ |
159b3be1 | 64 | unsigned ident; /* function ident */ |
10adac51 XDL |
65 | unsigned lineno_checksum; /* function lineno checksum */ |
66 | unsigned cfg_checksum; /* function cfg checksum */ | |
5366b186 NS |
67 | tree fn_decl; /* the function decl */ |
68 | tree ctr_vars[GCOV_COUNTERS]; /* counter variables. */ | |
ca29da43 NS |
69 | }; |
70 | ||
71 | /* Counts information for a function. */ | |
72 | typedef struct counts_entry | |
73 | { | |
74 | /* We hash by */ | |
796621e8 | 75 | unsigned ident; |
cdb23767 | 76 | unsigned ctr; |
159b3be1 | 77 | |
ca29da43 | 78 | /* Store */ |
10adac51 XDL |
79 | unsigned lineno_checksum; |
80 | unsigned cfg_checksum; | |
ca29da43 | 81 | gcov_type *counts; |
cdb23767 | 82 | struct gcov_ctr_summary summary; |
5deac340 RG |
83 | |
84 | /* hash_table support. */ | |
5831a5f0 LC |
85 | typedef counts_entry value_type; |
86 | typedef counts_entry compare_type; | |
87 | static inline hashval_t hash (const value_type *); | |
88 | static int equal (const value_type *, const compare_type *); | |
89 | static void remove (value_type *); | |
ca29da43 NS |
90 | } counts_entry_t; |
91 | ||
b724567e NS |
92 | static GTY(()) struct coverage_data *functions_head = 0; |
93 | static struct coverage_data **functions_tail = &functions_head; | |
6d70e6be | 94 | static unsigned no_coverage = 0; |
ca29da43 | 95 | |
cdb23767 NS |
96 | /* Cumulative counter information for whole program. */ |
97 | static unsigned prg_ctr_mask; /* Mask of counter types generated. */ | |
ca29da43 | 98 | |
cdb23767 | 99 | /* Counter information for current function. */ |
71c0e7fc | 100 | static unsigned fn_ctr_mask; /* Mask of counters used. */ |
5366b186 | 101 | static GTY(()) tree fn_v_ctrs[GCOV_COUNTERS]; /* counter variables. */ |
6d70e6be NS |
102 | static unsigned fn_n_ctrs[GCOV_COUNTERS]; /* Counters allocated. */ |
103 | static unsigned fn_b_ctrs[GCOV_COUNTERS]; /* Allocation base. */ | |
ca29da43 | 104 | |
b724567e NS |
105 | /* Coverage info VAR_DECL and function info type nodes. */ |
106 | static GTY(()) tree gcov_info_var; | |
107 | static GTY(()) tree gcov_fn_info_type; | |
108 | static GTY(()) tree gcov_fn_info_ptr_type; | |
109 | ||
efbb59b2 SB |
110 | /* Name of the notes (gcno) output file. The "bbg" prefix is for |
111 | historical reasons, when the notes file contained only the | |
112 | basic block graph notes. | |
113 | If this is NULL we're not writing to the notes file. */ | |
ca29da43 | 114 | static char *bbg_file_name; |
ca29da43 | 115 | |
efbb59b2 | 116 | /* File stamp for notes file. */ |
cb686b99 NS |
117 | static unsigned bbg_file_stamp; |
118 | ||
efbb59b2 | 119 | /* Name of the count data (gcda) file. */ |
ca29da43 NS |
120 | static char *da_file_name; |
121 | ||
09780dfb | 122 | /* The names of merge functions for counters. */ |
9b514d25 NS |
123 | static const char *const ctr_merge_functions[GCOV_COUNTERS] = GCOV_MERGE_FUNCTIONS; |
124 | static const char *const ctr_names[GCOV_COUNTERS] = GCOV_COUNTER_NAMES; | |
09780dfb | 125 | |
ca29da43 | 126 | /* Forward declarations. */ |
159b3be1 | 127 | static void read_counts_file (void); |
5366b186 NS |
128 | static tree build_var (tree, tree, int); |
129 | static void build_fn_info_type (tree, unsigned, tree); | |
b724567e NS |
130 | static void build_info_type (tree, tree); |
131 | static tree build_fn_info (const struct coverage_data *, tree, tree); | |
132 | static tree build_info (tree, tree); | |
133 | static bool coverage_obj_init (void); | |
9771b263 DN |
134 | static vec<constructor_elt, va_gc> *coverage_obj_fn |
135 | (vec<constructor_elt, va_gc> *, tree, struct coverage_data const *); | |
136 | static void coverage_obj_finish (vec<constructor_elt, va_gc> *); | |
251e2ff2 RS |
137 | \f |
138 | /* Return the type node for gcov_type. */ | |
139 | ||
140 | tree | |
141 | get_gcov_type (void) | |
142 | { | |
0f250839 RG |
143 | enum machine_mode mode = smallest_mode_for_size (GCOV_TYPE_SIZE, MODE_INT); |
144 | return lang_hooks.types.type_for_mode (mode, false); | |
251e2ff2 RS |
145 | } |
146 | ||
147 | /* Return the type node for gcov_unsigned_t. */ | |
ca29da43 | 148 | |
251e2ff2 RS |
149 | static tree |
150 | get_gcov_unsigned_t (void) | |
151 | { | |
0f250839 RG |
152 | enum machine_mode mode = smallest_mode_for_size (32, MODE_INT); |
153 | return lang_hooks.types.type_for_mode (mode, true); | |
251e2ff2 | 154 | } |
ca29da43 | 155 | \f |
0823efed | 156 | inline hashval_t |
5831a5f0 | 157 | counts_entry::hash (const value_type *entry) |
ca29da43 | 158 | { |
796621e8 | 159 | return entry->ident * GCOV_COUNTERS + entry->ctr; |
ca29da43 NS |
160 | } |
161 | ||
0823efed | 162 | inline int |
5831a5f0 LC |
163 | counts_entry::equal (const value_type *entry1, |
164 | const compare_type *entry2) | |
ca29da43 | 165 | { |
796621e8 | 166 | return entry1->ident == entry2->ident && entry1->ctr == entry2->ctr; |
ca29da43 NS |
167 | } |
168 | ||
0823efed | 169 | inline void |
5831a5f0 | 170 | counts_entry::remove (value_type *entry) |
ca29da43 | 171 | { |
ca29da43 NS |
172 | free (entry->counts); |
173 | free (entry); | |
174 | } | |
175 | ||
0823efed | 176 | /* Hash table of count data. */ |
5deac340 | 177 | static hash_table <counts_entry> counts_hash; |
0823efed | 178 | |
ca29da43 NS |
179 | /* Read in the counts file, if available. */ |
180 | ||
181 | static void | |
159b3be1 | 182 | read_counts_file (void) |
ca29da43 | 183 | { |
9b514d25 | 184 | gcov_unsigned_t fn_ident = 0; |
5366b186 NS |
185 | struct gcov_summary summary; |
186 | unsigned new_summary = 1; | |
7d63a2fa | 187 | gcov_unsigned_t tag; |
24a4a033 | 188 | int is_error = 0; |
10adac51 XDL |
189 | unsigned lineno_checksum = 0; |
190 | unsigned cfg_checksum = 0; | |
7d63a2fa | 191 | |
ca29da43 NS |
192 | if (!gcov_open (da_file_name, 1)) |
193 | return; | |
159b3be1 | 194 | |
160e2e4f | 195 | if (!gcov_magic (gcov_read_unsigned (), GCOV_DATA_MAGIC)) |
ca29da43 | 196 | { |
d4ee4d25 | 197 | warning (0, "%qs is not a gcov data file", da_file_name); |
ca29da43 NS |
198 | gcov_close (); |
199 | return; | |
200 | } | |
160e2e4f | 201 | else if ((tag = gcov_read_unsigned ()) != GCOV_VERSION) |
ca29da43 | 202 | { |
330d2e2a NS |
203 | char v[4], e[4]; |
204 | ||
205 | GCOV_UNSIGNED2STRING (v, tag); | |
206 | GCOV_UNSIGNED2STRING (e, GCOV_VERSION); | |
159b3be1 | 207 | |
d4ee4d25 | 208 | warning (0, "%qs is version %q.*s, expected version %q.*s", |
cb83302c | 209 | da_file_name, 4, v, 4, e); |
ca29da43 NS |
210 | gcov_close (); |
211 | return; | |
212 | } | |
159b3be1 | 213 | |
cb686b99 NS |
214 | /* Read the stamp, used for creating a generation count. */ |
215 | tag = gcov_read_unsigned (); | |
216 | bbg_file_stamp = crc32_unsigned (bbg_file_stamp, tag); | |
b8698a0f | 217 | |
0823efed | 218 | counts_hash.create (10); |
7d63a2fa | 219 | while ((tag = gcov_read_unsigned ())) |
ca29da43 | 220 | { |
7d63a2fa | 221 | gcov_unsigned_t length; |
9b514d25 | 222 | gcov_position_t offset; |
159b3be1 | 223 | |
ca29da43 NS |
224 | length = gcov_read_unsigned (); |
225 | offset = gcov_position (); | |
226 | if (tag == GCOV_TAG_FUNCTION) | |
227 | { | |
5366b186 | 228 | if (length) |
ca29da43 | 229 | { |
5366b186 NS |
230 | fn_ident = gcov_read_unsigned (); |
231 | lineno_checksum = gcov_read_unsigned (); | |
232 | cfg_checksum = gcov_read_unsigned (); | |
ca29da43 | 233 | } |
5366b186 NS |
234 | else |
235 | fn_ident = lineno_checksum = cfg_checksum = 0; | |
236 | new_summary = 1; | |
ca29da43 NS |
237 | } |
238 | else if (tag == GCOV_TAG_PROGRAM_SUMMARY) | |
239 | { | |
5366b186 NS |
240 | struct gcov_summary sum; |
241 | unsigned ix; | |
159b3be1 | 242 | |
5366b186 NS |
243 | if (new_summary) |
244 | memset (&summary, 0, sizeof (summary)); | |
159b3be1 | 245 | |
5366b186 NS |
246 | gcov_read_summary (&sum); |
247 | for (ix = 0; ix != GCOV_COUNTERS_SUMMABLE; ix++) | |
248 | { | |
249 | summary.ctrs[ix].runs += sum.ctrs[ix].runs; | |
250 | summary.ctrs[ix].sum_all += sum.ctrs[ix].sum_all; | |
251 | if (summary.ctrs[ix].run_max < sum.ctrs[ix].run_max) | |
252 | summary.ctrs[ix].run_max = sum.ctrs[ix].run_max; | |
253 | summary.ctrs[ix].sum_max += sum.ctrs[ix].sum_max; | |
ca29da43 | 254 | } |
9f71de84 TJ |
255 | if (new_summary) |
256 | memcpy (summary.ctrs[GCOV_COUNTER_ARCS].histogram, | |
257 | sum.ctrs[GCOV_COUNTER_ARCS].histogram, | |
258 | sizeof (gcov_bucket_type) * GCOV_HISTOGRAM_SIZE); | |
259 | else | |
260 | gcov_histogram_merge (summary.ctrs[GCOV_COUNTER_ARCS].histogram, | |
261 | sum.ctrs[GCOV_COUNTER_ARCS].histogram); | |
5366b186 | 262 | new_summary = 0; |
ca29da43 | 263 | } |
796621e8 | 264 | else if (GCOV_TAG_IS_COUNTER (tag) && fn_ident) |
ca29da43 NS |
265 | { |
266 | counts_entry_t **slot, *entry, elt; | |
330d2e2a | 267 | unsigned n_counts = GCOV_TAG_COUNTER_NUM (length); |
ca29da43 NS |
268 | unsigned ix; |
269 | ||
796621e8 | 270 | elt.ident = fn_ident; |
cdb23767 | 271 | elt.ctr = GCOV_COUNTER_FOR_TAG (tag); |
ca29da43 | 272 | |
0823efed | 273 | slot = counts_hash.find_slot (&elt, INSERT); |
ca29da43 NS |
274 | entry = *slot; |
275 | if (!entry) | |
276 | { | |
5ed6ace5 | 277 | *slot = entry = XCNEW (counts_entry_t); |
10adac51 | 278 | entry->ident = fn_ident; |
cdb23767 | 279 | entry->ctr = elt.ctr; |
10adac51 XDL |
280 | entry->lineno_checksum = lineno_checksum; |
281 | entry->cfg_checksum = cfg_checksum; | |
9f71de84 TJ |
282 | if (elt.ctr < GCOV_COUNTERS_SUMMABLE) |
283 | entry->summary = summary.ctrs[elt.ctr]; | |
284 | entry->summary.num = n_counts; | |
5ed6ace5 | 285 | entry->counts = XCNEWVEC (gcov_type, n_counts); |
ca29da43 | 286 | } |
10adac51 XDL |
287 | else if (entry->lineno_checksum != lineno_checksum |
288 | || entry->cfg_checksum != cfg_checksum) | |
ca29da43 | 289 | { |
10adac51 XDL |
290 | error ("Profile data for function %u is corrupted", fn_ident); |
291 | error ("checksum is (%x,%x) instead of (%x,%x)", | |
292 | entry->lineno_checksum, entry->cfg_checksum, | |
293 | lineno_checksum, cfg_checksum); | |
0823efed | 294 | counts_hash.dispose (); |
24a4a033 JH |
295 | break; |
296 | } | |
297 | else if (entry->summary.num != n_counts) | |
298 | { | |
10adac51 | 299 | error ("Profile data for function %u is corrupted", fn_ident); |
24a4a033 | 300 | error ("number of counters is %d instead of %d", entry->summary.num, n_counts); |
0823efed | 301 | counts_hash.dispose (); |
ca29da43 NS |
302 | break; |
303 | } | |
9b514d25 NS |
304 | else if (elt.ctr >= GCOV_COUNTERS_SUMMABLE) |
305 | { | |
24a4a033 JH |
306 | error ("cannot merge separate %s counters for function %u", |
307 | ctr_names[elt.ctr], fn_ident); | |
9b514d25 NS |
308 | goto skip_merge; |
309 | } | |
5366b186 | 310 | else |
ca29da43 | 311 | { |
5366b186 NS |
312 | entry->summary.runs += summary.ctrs[elt.ctr].runs; |
313 | entry->summary.sum_all += summary.ctrs[elt.ctr].sum_all; | |
314 | if (entry->summary.run_max < summary.ctrs[elt.ctr].run_max) | |
315 | entry->summary.run_max = summary.ctrs[elt.ctr].run_max; | |
316 | entry->summary.sum_max += summary.ctrs[elt.ctr].sum_max; | |
ca29da43 NS |
317 | } |
318 | for (ix = 0; ix != n_counts; ix++) | |
319 | entry->counts[ix] += gcov_read_counter (); | |
9b514d25 | 320 | skip_merge:; |
ca29da43 | 321 | } |
474f141e | 322 | gcov_sync (offset, length); |
24a4a033 | 323 | if ((is_error = gcov_is_error ())) |
00cf2913 | 324 | { |
971801ff | 325 | error (is_error < 0 ? "%qs has overflowed" : "%qs is corrupted", |
00cf2913 | 326 | da_file_name); |
0823efed | 327 | counts_hash.dispose (); |
00cf2913 NS |
328 | break; |
329 | } | |
7d63a2fa | 330 | } |
159b3be1 | 331 | |
ca29da43 NS |
332 | gcov_close (); |
333 | } | |
334 | ||
335 | /* Returns the counters for a particular tag. */ | |
336 | ||
337 | gcov_type * | |
cdb23767 | 338 | get_coverage_counts (unsigned counter, unsigned expected, |
10adac51 | 339 | unsigned cfg_checksum, unsigned lineno_checksum, |
cdb23767 | 340 | const struct gcov_ctr_summary **summary) |
ca29da43 NS |
341 | { |
342 | counts_entry_t *entry, elt; | |
343 | ||
71c0e7fc | 344 | /* No hash table, no counts. */ |
0823efed | 345 | if (!counts_hash.is_created ()) |
ca29da43 NS |
346 | { |
347 | static int warned = 0; | |
348 | ||
103ff0d6 TJ |
349 | if (!warned++ && dump_enabled_p ()) |
350 | dump_printf_loc (MSG_OPTIMIZED_LOCATIONS, input_location, | |
351 | (flag_guess_branch_prob | |
753b9bc3 | 352 | ? "file %s not found, execution counts estimated\n" |
103ff0d6 | 353 | : "file %s not found, execution counts assumed to " |
e645e942 | 354 | "be zero\n"), |
103ff0d6 | 355 | da_file_name); |
ca29da43 NS |
356 | return NULL; |
357 | } | |
358 | ||
6d70e6be | 359 | elt.ident = current_function_funcdef_no + 1; |
cdb23767 | 360 | elt.ctr = counter; |
0823efed | 361 | entry = counts_hash.find (&elt); |
5366b186 NS |
362 | if (!entry || !entry->summary.num) |
363 | /* The function was not emitted, or is weak and not chosen in the | |
364 | final executable. Silently fail, because there's nothing we | |
365 | can do about it. */ | |
366 | return NULL; | |
367 | ||
10adac51 | 368 | if (entry->cfg_checksum != cfg_checksum |
16c1c158 | 369 | || entry->summary.num != expected) |
24a4a033 | 370 | { |
16c1c158 | 371 | static int warned = 0; |
650cfcab | 372 | bool warning_printed = false; |
4f1e4960 | 373 | tree id = DECL_ASSEMBLER_NAME (current_function_decl); |
16c1c158 | 374 | |
10adac51 XDL |
375 | warning_printed = |
376 | warning_at (input_location, OPT_Wcoverage_mismatch, | |
5366b186 | 377 | "the control flow of function %qE does not match " |
10adac51 | 378 | "its profile data (counter %qs)", id, ctr_names[counter]); |
103ff0d6 | 379 | if (warning_printed && dump_enabled_p ()) |
16c1c158 | 380 | { |
103ff0d6 TJ |
381 | dump_printf_loc (MSG_OPTIMIZED_LOCATIONS, input_location, |
382 | "use -Wno-error=coverage-mismatch to tolerate " | |
383 | "the mismatch but performance may drop if the " | |
e645e942 | 384 | "function is hot\n"); |
650cfcab | 385 | |
1da2ed5f | 386 | if (!seen_error () |
650cfcab NV |
387 | && !warned++) |
388 | { | |
103ff0d6 | 389 | dump_printf_loc (MSG_OPTIMIZED_LOCATIONS, input_location, |
e645e942 TJ |
390 | "coverage mismatch ignored\n"); |
391 | dump_printf (MSG_OPTIMIZED_LOCATIONS, | |
392 | flag_guess_branch_prob | |
393 | ? G_("execution counts estimated\n") | |
394 | : G_("execution counts assumed to be zero\n")); | |
650cfcab | 395 | if (!flag_guess_branch_prob) |
e645e942 TJ |
396 | dump_printf (MSG_OPTIMIZED_LOCATIONS, |
397 | "this can result in poorly optimized code\n"); | |
650cfcab | 398 | } |
16c1c158 RG |
399 | } |
400 | ||
401 | return NULL; | |
ca29da43 | 402 | } |
5366b186 NS |
403 | else if (entry->lineno_checksum != lineno_checksum) |
404 | { | |
b724567e | 405 | warning (0, "source locations for function %qE have changed," |
5366b186 NS |
406 | " the profile data may be out of date", |
407 | DECL_ASSEMBLER_NAME (current_function_decl)); | |
408 | } | |
159b3be1 | 409 | |
cdb23767 NS |
410 | if (summary) |
411 | *summary = &entry->summary; | |
ca29da43 NS |
412 | |
413 | return entry->counts; | |
414 | } | |
cdb23767 | 415 | |
6356f892 | 416 | /* Allocate NUM counters of type COUNTER. Returns nonzero if the |
6d70e6be | 417 | allocation succeeded. */ |
cdb23767 | 418 | |
6d70e6be NS |
419 | int |
420 | coverage_counter_alloc (unsigned counter, unsigned num) | |
cdb23767 | 421 | { |
6d70e6be NS |
422 | if (no_coverage) |
423 | return 0; | |
159b3be1 | 424 | |
6d70e6be NS |
425 | if (!num) |
426 | return 1; | |
159b3be1 | 427 | |
5366b186 | 428 | if (!fn_v_ctrs[counter]) |
cdb23767 | 429 | { |
5366b186 NS |
430 | tree array_type = build_array_type (get_gcov_type (), NULL_TREE); |
431 | ||
432 | fn_v_ctrs[counter] | |
433 | = build_var (current_function_decl, array_type, counter); | |
cdb23767 | 434 | } |
5366b186 | 435 | |
6d70e6be NS |
436 | fn_b_ctrs[counter] = fn_n_ctrs[counter]; |
437 | fn_n_ctrs[counter] += num; | |
5366b186 | 438 | |
6d70e6be NS |
439 | fn_ctr_mask |= 1 << counter; |
440 | return 1; | |
441 | } | |
cdb23767 | 442 | |
6de9cd9a DN |
443 | /* Generate a tree to access COUNTER NO. */ |
444 | ||
445 | tree | |
446 | tree_coverage_counter_ref (unsigned counter, unsigned no) | |
447 | { | |
070e3969 | 448 | tree gcov_type_node = get_gcov_type (); |
6de9cd9a | 449 | |
341c100f | 450 | gcc_assert (no < fn_n_ctrs[counter] - fn_b_ctrs[counter]); |
6de9cd9a | 451 | |
5366b186 NS |
452 | no += fn_b_ctrs[counter]; |
453 | ||
6de9cd9a | 454 | /* "no" here is an array index, scaled to bytes later. */ |
5366b186 | 455 | return build4 (ARRAY_REF, gcov_type_node, fn_v_ctrs[counter], |
f81b1a3d | 456 | build_int_cst (integer_type_node, no), NULL, NULL); |
6de9cd9a | 457 | } |
fc9161c1 RG |
458 | |
459 | /* Generate a tree to access the address of COUNTER NO. */ | |
460 | ||
461 | tree | |
462 | tree_coverage_counter_addr (unsigned counter, unsigned no) | |
463 | { | |
464 | tree gcov_type_node = get_gcov_type (); | |
465 | ||
466 | gcc_assert (no < fn_n_ctrs[counter] - fn_b_ctrs[counter]); | |
5366b186 | 467 | no += fn_b_ctrs[counter]; |
628c189e | 468 | |
fc9161c1 RG |
469 | /* "no" here is an array index, scaled to bytes later. */ |
470 | return build_fold_addr_expr (build4 (ARRAY_REF, gcov_type_node, | |
5366b186 | 471 | fn_v_ctrs[counter], |
f81b1a3d | 472 | build_int_cst (integer_type_node, no), |
fc9161c1 RG |
473 | NULL, NULL)); |
474 | } | |
ca29da43 | 475 | \f |
10adac51 | 476 | |
ca29da43 | 477 | /* Generate a checksum for a string. CHKSUM is the current |
71c0e7fc | 478 | checksum. */ |
ca29da43 NS |
479 | |
480 | static unsigned | |
20c361f3 | 481 | coverage_checksum_string (unsigned chksum, const char *string) |
ca29da43 | 482 | { |
20c361f3 JH |
483 | int i; |
484 | char *dup = NULL; | |
485 | ||
486 | /* Look for everything that looks if it were produced by | |
5880f14f | 487 | get_file_function_name and zero out the second part |
20c361f3 JH |
488 | that may result from flag_random_seed. This is not critical |
489 | as the checksums are used only for sanity checking. */ | |
490 | for (i = 0; string[i]; i++) | |
ca29da43 | 491 | { |
2b557972 JH |
492 | int offset = 0; |
493 | if (!strncmp (string + i, "_GLOBAL__N_", 11)) | |
494 | offset = 11; | |
20c361f3 | 495 | if (!strncmp (string + i, "_GLOBAL__", 9)) |
2b557972 JH |
496 | offset = 9; |
497 | ||
498 | /* C++ namespaces do have scheme: | |
499 | _GLOBAL__N_<filename>_<wrongmagicnumber>_<magicnumber>functionname | |
500 | since filename might contain extra underscores there seems | |
501 | to be no better chance then walk all possible offsets looking | |
fa10beec | 502 | for magicnumber. */ |
2b557972 | 503 | if (offset) |
1f651229 JH |
504 | { |
505 | for (i = i + offset; string[i]; i++) | |
506 | if (string[i]=='_') | |
507 | { | |
508 | int y; | |
509 | ||
510 | for (y = 1; y < 9; y++) | |
511 | if (!(string[i + y] >= '0' && string[i + y] <= '9') | |
512 | && !(string[i + y] >= 'A' && string[i + y] <= 'F')) | |
513 | break; | |
514 | if (y != 9 || string[i + 9] != '_') | |
515 | continue; | |
516 | for (y = 10; y < 18; y++) | |
517 | if (!(string[i + y] >= '0' && string[i + y] <= '9') | |
518 | && !(string[i + y] >= 'A' && string[i + y] <= 'F')) | |
519 | break; | |
520 | if (y != 18) | |
521 | continue; | |
522 | if (!dup) | |
523 | string = dup = xstrdup (string); | |
524 | for (y = 10; y < 18; y++) | |
525 | dup[i + y] = '0'; | |
526 | } | |
527 | break; | |
528 | } | |
ca29da43 | 529 | } |
20c361f3 JH |
530 | |
531 | chksum = crc32_string (chksum, string); | |
04695783 | 532 | free (dup); |
159b3be1 | 533 | |
ca29da43 NS |
534 | return chksum; |
535 | } | |
536 | ||
537 | /* Compute checksum for the current function. We generate a CRC32. */ | |
538 | ||
10adac51 XDL |
539 | unsigned |
540 | coverage_compute_lineno_checksum (void) | |
ca29da43 | 541 | { |
a281759f PB |
542 | expanded_location xloc |
543 | = expand_location (DECL_SOURCE_LOCATION (current_function_decl)); | |
544 | unsigned chksum = xloc.line; | |
ca29da43 | 545 | |
a281759f | 546 | chksum = coverage_checksum_string (chksum, xloc.file); |
20c361f3 | 547 | chksum = coverage_checksum_string |
ca29da43 NS |
548 | (chksum, IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (current_function_decl))); |
549 | ||
550 | return chksum; | |
551 | } | |
10adac51 | 552 | |
2fa3d31b JH |
553 | /* Compute profile ID. This is better to be unique in whole program. */ |
554 | ||
555 | unsigned | |
556 | coverage_compute_profile_id (struct cgraph_node *n) | |
557 | { | |
558 | expanded_location xloc | |
67348ccc | 559 | = expand_location (DECL_SOURCE_LOCATION (n->decl)); |
2fa3d31b JH |
560 | unsigned chksum = xloc.line; |
561 | ||
562 | chksum = coverage_checksum_string (chksum, xloc.file); | |
563 | chksum = coverage_checksum_string | |
67348ccc | 564 | (chksum, IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (n->decl))); |
2fa3d31b JH |
565 | if (first_global_object_name) |
566 | chksum = coverage_checksum_string | |
567 | (chksum, first_global_object_name); | |
568 | chksum = coverage_checksum_string | |
569 | (chksum, aux_base_name); | |
570 | ||
571 | /* Non-negative integers are hopefully small enough to fit in all targets. */ | |
572 | return chksum & 0x7fffffff; | |
573 | } | |
574 | ||
10adac51 XDL |
575 | /* Compute cfg checksum for the current function. |
576 | The checksum is calculated carefully so that | |
577 | source code changes that doesn't affect the control flow graph | |
578 | won't change the checksum. | |
579 | This is to make the profile data useable across source code change. | |
580 | The downside of this is that the compiler may use potentially | |
581 | wrong profile data - that the source code change has non-trivial impact | |
582 | on the validity of profile data (e.g. the reversed condition) | |
583 | but the compiler won't detect the change and use the wrong profile data. */ | |
584 | ||
585 | unsigned | |
586 | coverage_compute_cfg_checksum (void) | |
587 | { | |
588 | basic_block bb; | |
0cae8d31 | 589 | unsigned chksum = n_basic_blocks_for_fn (cfun); |
10adac51 XDL |
590 | |
591 | FOR_EACH_BB (bb) | |
592 | { | |
593 | edge e; | |
594 | edge_iterator ei; | |
595 | chksum = crc32_byte (chksum, bb->index); | |
596 | FOR_EACH_EDGE (e, ei, bb->succs) | |
597 | { | |
598 | chksum = crc32_byte (chksum, e->dest->index); | |
599 | } | |
600 | } | |
601 | ||
602 | return chksum; | |
603 | } | |
ca29da43 | 604 | \f |
efbb59b2 | 605 | /* Begin output to the notes file for the current function. |
b724567e | 606 | Writes the function header. Returns nonzero if data should be output. */ |
ca29da43 NS |
607 | |
608 | int | |
b724567e | 609 | coverage_begin_function (unsigned lineno_checksum, unsigned cfg_checksum) |
ca29da43 | 610 | { |
b724567e NS |
611 | expanded_location xloc; |
612 | unsigned long offset; | |
613 | ||
2f908293 SP |
614 | /* We don't need to output .gcno file unless we're under -ftest-coverage |
615 | (e.g. -fprofile-arcs/generate/use don't need .gcno to work). */ | |
b724567e | 616 | if (no_coverage || !bbg_file_name) |
6d70e6be | 617 | return 0; |
159b3be1 | 618 | |
b724567e | 619 | xloc = expand_location (DECL_SOURCE_LOCATION (current_function_decl)); |
10adac51 | 620 | |
b724567e NS |
621 | /* Announce function */ |
622 | offset = gcov_write_tag (GCOV_TAG_FUNCTION); | |
623 | gcov_write_unsigned (current_function_funcdef_no + 1); | |
624 | gcov_write_unsigned (lineno_checksum); | |
625 | gcov_write_unsigned (cfg_checksum); | |
626 | gcov_write_string (IDENTIFIER_POINTER | |
627 | (DECL_ASSEMBLER_NAME (current_function_decl))); | |
628 | gcov_write_string (xloc.file); | |
629 | gcov_write_unsigned (xloc.line); | |
630 | gcov_write_length (offset); | |
ca29da43 | 631 | |
ca29da43 NS |
632 | return !gcov_is_error (); |
633 | } | |
634 | ||
635 | /* Finish coverage data for the current function. Verify no output | |
636 | error has occurred. Save function coverage counts. */ | |
637 | ||
638 | void | |
10adac51 | 639 | coverage_end_function (unsigned lineno_checksum, unsigned cfg_checksum) |
ca29da43 NS |
640 | { |
641 | unsigned i; | |
159b3be1 | 642 | |
b724567e | 643 | if (bbg_file_name && gcov_is_error ()) |
159b3be1 | 644 | { |
d4ee4d25 | 645 | warning (0, "error writing %qs", bbg_file_name); |
b724567e NS |
646 | unlink (bbg_file_name); |
647 | bbg_file_name = NULL; | |
ca29da43 | 648 | } |
cdb23767 | 649 | |
2ac69a0c | 650 | if (fn_ctr_mask) |
cdb23767 | 651 | { |
2ac69a0c NS |
652 | struct coverage_data *item = 0; |
653 | ||
654 | /* If the function is extern (i.e. extern inline), then we won't | |
655 | be outputting it, so don't chain it onto the function | |
656 | list. */ | |
657 | if (!DECL_EXTERNAL (current_function_decl)) | |
658 | { | |
659 | item = ggc_alloc_coverage_data (); | |
660 | ||
661 | item->ident = current_function_funcdef_no + 1; | |
662 | item->lineno_checksum = lineno_checksum; | |
663 | item->cfg_checksum = cfg_checksum; | |
664 | ||
665 | item->fn_decl = current_function_decl; | |
666 | item->next = 0; | |
667 | *functions_tail = item; | |
668 | functions_tail = &item->next; | |
669 | } | |
10adac51 | 670 | |
cdb23767 NS |
671 | for (i = 0; i != GCOV_COUNTERS; i++) |
672 | { | |
5366b186 | 673 | tree var = fn_v_ctrs[i]; |
2ac69a0c NS |
674 | |
675 | if (item) | |
676 | item->ctr_vars[i] = var; | |
5366b186 NS |
677 | if (var) |
678 | { | |
679 | tree array_type = build_index_type (size_int (fn_n_ctrs[i] - 1)); | |
680 | array_type = build_array_type (get_gcov_type (), array_type); | |
681 | TREE_TYPE (var) = array_type; | |
682 | DECL_SIZE (var) = TYPE_SIZE (array_type); | |
683 | DECL_SIZE_UNIT (var) = TYPE_SIZE_UNIT (array_type); | |
684 | varpool_finalize_decl (var); | |
685 | } | |
2ac69a0c | 686 | |
5366b186 NS |
687 | fn_b_ctrs[i] = fn_n_ctrs[i] = 0; |
688 | fn_v_ctrs[i] = NULL_TREE; | |
cdb23767 NS |
689 | } |
690 | prg_ctr_mask |= fn_ctr_mask; | |
691 | fn_ctr_mask = 0; | |
692 | } | |
ca29da43 NS |
693 | } |
694 | ||
5366b186 | 695 | /* Build a coverage variable of TYPE for function FN_DECL. If COUNTER |
0e485da0 | 696 | >= 0 it is a counter array, otherwise it is the function structure. */ |
ca29da43 | 697 | |
ca29da43 | 698 | static tree |
5366b186 NS |
699 | build_var (tree fn_decl, tree type, int counter) |
700 | { | |
701 | tree var = build_decl (BUILTINS_LOCATION, VAR_DECL, NULL_TREE, type); | |
9e66e106 JJ |
702 | const char *fn_name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (fn_decl)); |
703 | char *buf; | |
704 | size_t fn_name_len, len; | |
705 | ||
706 | fn_name = targetm.strip_name_encoding (fn_name); | |
707 | fn_name_len = strlen (fn_name); | |
708 | buf = XALLOCAVEC (char, fn_name_len + 8 + sizeof (int) * 3); | |
5366b186 | 709 | |
5366b186 | 710 | if (counter < 0) |
9e66e106 | 711 | strcpy (buf, "__gcov__"); |
5366b186 | 712 | else |
9e66e106 JJ |
713 | sprintf (buf, "__gcov%u_", counter); |
714 | len = strlen (buf); | |
715 | #ifndef NO_DOT_IN_LABEL | |
716 | buf[len - 1] = '.'; | |
717 | #elif !defined NO_DOLLAR_IN_LABEL | |
718 | buf[len - 1] = '$'; | |
719 | #endif | |
720 | memcpy (buf + len, fn_name, fn_name_len + 1); | |
5366b186 | 721 | DECL_NAME (var) = get_identifier (buf); |
89b0c303 NS |
722 | TREE_STATIC (var) = 1; |
723 | TREE_ADDRESSABLE (var) = 1; | |
724 | DECL_ALIGN (var) = TYPE_ALIGN (type); | |
5366b186 NS |
725 | |
726 | return var; | |
727 | } | |
728 | ||
729 | /* Creates the gcov_fn_info RECORD_TYPE. */ | |
730 | ||
731 | static void | |
732 | build_fn_info_type (tree type, unsigned counters, tree gcov_info_type) | |
ca29da43 | 733 | { |
5366b186 | 734 | tree ctr_info = lang_hooks.types.make_type (RECORD_TYPE); |
ca29da43 | 735 | tree field, fields; |
cdb23767 | 736 | tree array_type; |
159b3be1 | 737 | |
5366b186 NS |
738 | gcc_assert (counters); |
739 | ||
740 | /* ctr_info::num */ | |
741 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
742 | get_gcov_unsigned_t ()); | |
743 | fields = field; | |
744 | ||
745 | /* ctr_info::values */ | |
746 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
747 | build_pointer_type (get_gcov_type ())); | |
748 | DECL_CHAIN (field) = fields; | |
749 | fields = field; | |
750 | ||
751 | finish_builtin_struct (ctr_info, "__gcov_ctr_info", fields, NULL_TREE); | |
752 | ||
753 | /* key */ | |
754 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
755 | build_pointer_type (build_qualified_type | |
756 | (gcov_info_type, TYPE_QUAL_CONST))); | |
757 | fields = field; | |
758 | ||
796621e8 | 759 | /* ident */ |
5366b186 NS |
760 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, |
761 | get_gcov_unsigned_t ()); | |
762 | DECL_CHAIN (field) = fields; | |
763 | fields = field; | |
764 | ||
10adac51 | 765 | /* lineno_checksum */ |
5366b186 NS |
766 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, |
767 | get_gcov_unsigned_t ()); | |
910ad8de | 768 | DECL_CHAIN (field) = fields; |
ca29da43 NS |
769 | fields = field; |
770 | ||
10adac51 | 771 | /* cfg checksum */ |
5366b186 NS |
772 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, |
773 | get_gcov_unsigned_t ()); | |
10adac51 XDL |
774 | DECL_CHAIN (field) = fields; |
775 | fields = field; | |
776 | ||
f81b1a3d | 777 | array_type = build_index_type (size_int (counters - 1)); |
5366b186 | 778 | array_type = build_array_type (ctr_info, array_type); |
159b3be1 | 779 | |
ca29da43 | 780 | /* counters */ |
5366b186 | 781 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, array_type); |
910ad8de | 782 | DECL_CHAIN (field) = fields; |
ca29da43 NS |
783 | fields = field; |
784 | ||
cdb23767 | 785 | finish_builtin_struct (type, "__gcov_fn_info", fields, NULL_TREE); |
ca29da43 NS |
786 | } |
787 | ||
b724567e NS |
788 | /* Returns a CONSTRUCTOR for a gcov_fn_info. DATA is |
789 | the coverage data for the function and TYPE is the gcov_fn_info | |
790 | RECORD_TYPE. KEY is the object file key. */ | |
cdb23767 | 791 | |
ca29da43 | 792 | static tree |
b724567e | 793 | build_fn_info (const struct coverage_data *data, tree type, tree key) |
ca29da43 | 794 | { |
cdb23767 | 795 | tree fields = TYPE_FIELDS (type); |
5366b186 | 796 | tree ctr_type; |
cdb23767 | 797 | unsigned ix; |
9771b263 DN |
798 | vec<constructor_elt, va_gc> *v1 = NULL; |
799 | vec<constructor_elt, va_gc> *v2 = NULL; | |
159b3be1 | 800 | |
5366b186 NS |
801 | /* key */ |
802 | CONSTRUCTOR_APPEND_ELT (v1, fields, | |
803 | build1 (ADDR_EXPR, TREE_TYPE (fields), key)); | |
804 | fields = DECL_CHAIN (fields); | |
805 | ||
796621e8 | 806 | /* ident */ |
f9b36bb3 KH |
807 | CONSTRUCTOR_APPEND_ELT (v1, fields, |
808 | build_int_cstu (get_gcov_unsigned_t (), | |
b724567e | 809 | data->ident)); |
910ad8de | 810 | fields = DECL_CHAIN (fields); |
159b3be1 | 811 | |
10adac51 XDL |
812 | /* lineno_checksum */ |
813 | CONSTRUCTOR_APPEND_ELT (v1, fields, | |
814 | build_int_cstu (get_gcov_unsigned_t (), | |
b724567e | 815 | data->lineno_checksum)); |
10adac51 XDL |
816 | fields = DECL_CHAIN (fields); |
817 | ||
818 | /* cfg_checksum */ | |
f9b36bb3 KH |
819 | CONSTRUCTOR_APPEND_ELT (v1, fields, |
820 | build_int_cstu (get_gcov_unsigned_t (), | |
b724567e | 821 | data->cfg_checksum)); |
910ad8de | 822 | fields = DECL_CHAIN (fields); |
159b3be1 | 823 | |
ca29da43 | 824 | /* counters */ |
5366b186 | 825 | ctr_type = TREE_TYPE (TREE_TYPE (fields)); |
cdb23767 NS |
826 | for (ix = 0; ix != GCOV_COUNTERS; ix++) |
827 | if (prg_ctr_mask & (1 << ix)) | |
5366b186 | 828 | { |
9771b263 | 829 | vec<constructor_elt, va_gc> *ctr = NULL; |
b724567e | 830 | tree var = data->ctr_vars[ix]; |
5366b186 NS |
831 | unsigned count = 0; |
832 | ||
833 | if (var) | |
834 | count | |
9439e9a1 | 835 | = tree_to_shwi (TYPE_MAX_VALUE (TYPE_DOMAIN (TREE_TYPE (var)))) |
5366b186 NS |
836 | + 1; |
837 | ||
838 | CONSTRUCTOR_APPEND_ELT (ctr, TYPE_FIELDS (ctr_type), | |
839 | build_int_cstu (get_gcov_unsigned_t (), | |
840 | count)); | |
841 | ||
842 | if (var) | |
843 | CONSTRUCTOR_APPEND_ELT (ctr, DECL_CHAIN (TYPE_FIELDS (ctr_type)), | |
844 | build_fold_addr_expr (var)); | |
845 | ||
846 | CONSTRUCTOR_APPEND_ELT (v2, NULL, build_constructor (ctr_type, ctr)); | |
847 | } | |
848 | ||
f9b36bb3 KH |
849 | CONSTRUCTOR_APPEND_ELT (v1, fields, |
850 | build_constructor (TREE_TYPE (fields), v2)); | |
159b3be1 | 851 | |
f9b36bb3 | 852 | return build_constructor (type, v1); |
ca29da43 NS |
853 | } |
854 | ||
b724567e NS |
855 | /* Create gcov_info struct. TYPE is the incomplete RECORD_TYPE to be |
856 | completed, and FN_INFO_PTR_TYPE is a pointer to the function info type. */ | |
cdb23767 | 857 | |
5366b186 | 858 | static void |
b724567e | 859 | build_info_type (tree type, tree fn_info_ptr_type) |
ca29da43 | 860 | { |
cdb23767 | 861 | tree field, fields = NULL_TREE; |
b724567e | 862 | tree merge_fn_type; |
9b514d25 | 863 | |
5366b186 NS |
864 | /* Version ident */ |
865 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
866 | get_gcov_unsigned_t ()); | |
910ad8de | 867 | DECL_CHAIN (field) = fields; |
ca29da43 NS |
868 | fields = field; |
869 | ||
5366b186 NS |
870 | /* next pointer */ |
871 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
872 | build_pointer_type (build_qualified_type | |
873 | (type, TYPE_QUAL_CONST))); | |
910ad8de | 874 | DECL_CHAIN (field) = fields; |
ca29da43 NS |
875 | fields = field; |
876 | ||
5366b186 NS |
877 | /* stamp */ |
878 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
879 | get_gcov_unsigned_t ()); | |
910ad8de | 880 | DECL_CHAIN (field) = fields; |
09780dfb ZD |
881 | fields = field; |
882 | ||
5366b186 NS |
883 | /* Filename */ |
884 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
885 | build_pointer_type (build_qualified_type | |
886 | (char_type_node, TYPE_QUAL_CONST))); | |
887 | DECL_CHAIN (field) = fields; | |
888 | fields = field; | |
ca29da43 | 889 | |
5366b186 NS |
890 | /* merge fn array */ |
891 | merge_fn_type | |
892 | = build_function_type_list (void_type_node, | |
893 | build_pointer_type (get_gcov_type ()), | |
894 | get_gcov_unsigned_t (), NULL_TREE); | |
895 | merge_fn_type | |
896 | = build_array_type (build_pointer_type (merge_fn_type), | |
897 | build_index_type (size_int (GCOV_COUNTERS - 1))); | |
898 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
899 | merge_fn_type); | |
900 | DECL_CHAIN (field) = fields; | |
901 | fields = field; | |
902 | ||
903 | /* n_functions */ | |
904 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
905 | get_gcov_unsigned_t ()); | |
906 | DECL_CHAIN (field) = fields; | |
907 | fields = field; | |
908 | ||
b724567e NS |
909 | /* function_info pointer pointer */ |
910 | fn_info_ptr_type = build_pointer_type | |
911 | (build_qualified_type (fn_info_ptr_type, TYPE_QUAL_CONST)); | |
5366b186 | 912 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, |
b724567e | 913 | fn_info_ptr_type); |
5366b186 NS |
914 | DECL_CHAIN (field) = fields; |
915 | fields = field; | |
09780dfb | 916 | |
5366b186 | 917 | finish_builtin_struct (type, "__gcov_info", fields, NULL_TREE); |
ca29da43 NS |
918 | } |
919 | ||
b724567e NS |
920 | /* Returns a CONSTRUCTOR for the gcov_info object. INFO_TYPE is the |
921 | gcov_info structure type, FN_ARY is the array of pointers to | |
922 | function info objects. */ | |
cdb23767 | 923 | |
ca29da43 | 924 | static tree |
b724567e | 925 | build_info (tree info_type, tree fn_ary) |
ca29da43 | 926 | { |
5366b186 | 927 | tree info_fields = TYPE_FIELDS (info_type); |
b724567e | 928 | tree merge_fn_type, n_funcs; |
5366b186 | 929 | unsigned ix; |
cdb23767 | 930 | tree filename_string; |
2f908293 | 931 | int da_file_name_len; |
9771b263 DN |
932 | vec<constructor_elt, va_gc> *v1 = NULL; |
933 | vec<constructor_elt, va_gc> *v2 = NULL; | |
159b3be1 | 934 | |
cdb23767 | 935 | /* Version ident */ |
5366b186 NS |
936 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, |
937 | build_int_cstu (TREE_TYPE (info_fields), | |
938 | GCOV_VERSION)); | |
939 | info_fields = DECL_CHAIN (info_fields); | |
159b3be1 | 940 | |
ca29da43 | 941 | /* next -- NULL */ |
5366b186 NS |
942 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, null_pointer_node); |
943 | info_fields = DECL_CHAIN (info_fields); | |
944 | ||
dd486eb2 | 945 | /* stamp */ |
5366b186 NS |
946 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, |
947 | build_int_cstu (TREE_TYPE (info_fields), | |
cb686b99 | 948 | bbg_file_stamp)); |
5366b186 | 949 | info_fields = DECL_CHAIN (info_fields); |
dd486eb2 | 950 | |
ca29da43 | 951 | /* Filename */ |
2f908293 SP |
952 | da_file_name_len = strlen (da_file_name); |
953 | filename_string = build_string (da_file_name_len + 1, da_file_name); | |
4a90aeeb | 954 | TREE_TYPE (filename_string) = build_array_type |
f81b1a3d | 955 | (char_type_node, build_index_type (size_int (da_file_name_len))); |
5366b186 NS |
956 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, |
957 | build1 (ADDR_EXPR, TREE_TYPE (info_fields), | |
958 | filename_string)); | |
959 | info_fields = DECL_CHAIN (info_fields); | |
159b3be1 | 960 | |
5366b186 NS |
961 | /* merge fn array -- NULL slots indicate unmeasured counters */ |
962 | merge_fn_type = TREE_TYPE (TREE_TYPE (info_fields)); | |
963 | for (ix = 0; ix != GCOV_COUNTERS; ix++) | |
ca29da43 | 964 | { |
5366b186 | 965 | tree ptr = null_pointer_node; |
159b3be1 | 966 | |
5366b186 NS |
967 | if ((1u << ix) & prg_ctr_mask) |
968 | { | |
969 | tree merge_fn = build_decl (BUILTINS_LOCATION, | |
970 | FUNCTION_DECL, | |
971 | get_identifier (ctr_merge_functions[ix]), | |
972 | TREE_TYPE (merge_fn_type)); | |
973 | DECL_EXTERNAL (merge_fn) = 1; | |
974 | TREE_PUBLIC (merge_fn) = 1; | |
975 | DECL_ARTIFICIAL (merge_fn) = 1; | |
976 | TREE_NOTHROW (merge_fn) = 1; | |
977 | /* Initialize assembler name so we can stream out. */ | |
978 | DECL_ASSEMBLER_NAME (merge_fn); | |
979 | ptr = build1 (ADDR_EXPR, merge_fn_type, merge_fn); | |
980 | } | |
981 | CONSTRUCTOR_APPEND_ELT (v2, NULL, ptr); | |
ca29da43 | 982 | } |
5366b186 NS |
983 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, |
984 | build_constructor (TREE_TYPE (info_fields), v2)); | |
985 | info_fields = DECL_CHAIN (info_fields); | |
986 | ||
987 | /* n_functions */ | |
b724567e NS |
988 | n_funcs = TYPE_MAX_VALUE (TYPE_DOMAIN (TREE_TYPE (fn_ary))); |
989 | n_funcs = fold_build2 (PLUS_EXPR, TREE_TYPE (info_fields), | |
990 | n_funcs, size_one_node); | |
991 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, n_funcs); | |
5366b186 | 992 | info_fields = DECL_CHAIN (info_fields); |
5366b186 | 993 | |
b724567e | 994 | /* functions */ |
5366b186 | 995 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, |
b724567e NS |
996 | build1 (ADDR_EXPR, TREE_TYPE (info_fields), fn_ary)); |
997 | info_fields = DECL_CHAIN (info_fields); | |
998 | ||
999 | gcc_assert (!info_fields); | |
5366b186 | 1000 | return build_constructor (info_type, v1); |
ca29da43 NS |
1001 | } |
1002 | ||
d6d7eee1 GW |
1003 | /* Generate the constructor function to call __gcov_init. */ |
1004 | ||
1005 | static void | |
1006 | build_init_ctor (tree gcov_info_type) | |
1007 | { | |
1008 | tree ctor, stmt, init_fn; | |
1009 | ||
1010 | /* Build a decl for __gcov_init. */ | |
1011 | init_fn = build_pointer_type (gcov_info_type); | |
1012 | init_fn = build_function_type_list (void_type_node, init_fn, NULL); | |
1013 | init_fn = build_decl (BUILTINS_LOCATION, FUNCTION_DECL, | |
1014 | get_identifier ("__gcov_init"), init_fn); | |
1015 | TREE_PUBLIC (init_fn) = 1; | |
1016 | DECL_EXTERNAL (init_fn) = 1; | |
1017 | DECL_ASSEMBLER_NAME (init_fn); | |
1018 | ||
1019 | /* Generate a call to __gcov_init(&gcov_info). */ | |
1020 | ctor = NULL; | |
1021 | stmt = build_fold_addr_expr (gcov_info_var); | |
1022 | stmt = build_call_expr (init_fn, 1, stmt); | |
1023 | append_to_statement_list (stmt, &ctor); | |
1024 | ||
1025 | /* Generate a constructor to run it. */ | |
1026 | cgraph_build_static_cdtor ('I', ctor, DEFAULT_INIT_PRIORITY); | |
1027 | } | |
1028 | ||
b724567e NS |
1029 | /* Create the gcov_info types and object. Generate the constructor |
1030 | function to call __gcov_init. Does not generate the initializer | |
1031 | for the object. Returns TRUE if coverage data is being emitted. */ | |
ca29da43 | 1032 | |
b724567e NS |
1033 | static bool |
1034 | coverage_obj_init (void) | |
ca29da43 | 1035 | { |
d6d7eee1 | 1036 | tree gcov_info_type; |
b724567e | 1037 | unsigned n_counters = 0; |
5366b186 | 1038 | unsigned ix; |
b724567e NS |
1039 | struct coverage_data *fn; |
1040 | struct coverage_data **fn_prev; | |
c9b9aa64 | 1041 | char name_buf[32]; |
ca29da43 | 1042 | |
6d70e6be | 1043 | no_coverage = 1; /* Disable any further coverage. */ |
159b3be1 | 1044 | |
cdb23767 | 1045 | if (!prg_ctr_mask) |
b724567e | 1046 | return false; |
159b3be1 | 1047 | |
5366b186 NS |
1048 | if (cgraph_dump_file) |
1049 | fprintf (cgraph_dump_file, "Using data file %s\n", da_file_name); | |
ca29da43 | 1050 | |
b724567e | 1051 | /* Prune functions. */ |
5366b186 NS |
1052 | for (fn_prev = &functions_head; (fn = *fn_prev);) |
1053 | if (DECL_STRUCT_FUNCTION (fn->fn_decl)) | |
b724567e | 1054 | fn_prev = &fn->next; |
5366b186 NS |
1055 | else |
1056 | /* The function is not being emitted, remove from list. */ | |
1057 | *fn_prev = fn->next; | |
b724567e | 1058 | |
0f9fb22f JJ |
1059 | if (functions_head == NULL) |
1060 | return false; | |
1061 | ||
b724567e NS |
1062 | for (ix = 0; ix != GCOV_COUNTERS; ix++) |
1063 | if ((1u << ix) & prg_ctr_mask) | |
1064 | n_counters++; | |
5366b186 NS |
1065 | |
1066 | /* Build the info and fn_info types. These are mutually recursive. */ | |
1067 | gcov_info_type = lang_hooks.types.make_type (RECORD_TYPE); | |
b724567e NS |
1068 | gcov_fn_info_type = lang_hooks.types.make_type (RECORD_TYPE); |
1069 | gcov_fn_info_ptr_type = build_pointer_type | |
1070 | (build_qualified_type (gcov_fn_info_type, TYPE_QUAL_CONST)); | |
1071 | build_fn_info_type (gcov_fn_info_type, n_counters, gcov_info_type); | |
1072 | build_info_type (gcov_info_type, gcov_fn_info_ptr_type); | |
5366b186 NS |
1073 | |
1074 | /* Build the gcov info var, this is referred to in its own | |
1075 | initializer. */ | |
b724567e NS |
1076 | gcov_info_var = build_decl (BUILTINS_LOCATION, |
1077 | VAR_DECL, NULL_TREE, gcov_info_type); | |
1078 | TREE_STATIC (gcov_info_var) = 1; | |
c9b9aa64 | 1079 | ASM_GENERATE_INTERNAL_LABEL (name_buf, "LPBX", 0); |
b724567e | 1080 | DECL_NAME (gcov_info_var) = get_identifier (name_buf); |
ca29da43 | 1081 | |
d6d7eee1 | 1082 | build_init_ctor (gcov_info_type); |
b724567e NS |
1083 | |
1084 | return true; | |
ca29da43 | 1085 | } |
b724567e NS |
1086 | |
1087 | /* Generate the coverage function info for FN and DATA. Append a | |
1088 | pointer to that object to CTOR and return the appended CTOR. */ | |
1089 | ||
9771b263 DN |
1090 | static vec<constructor_elt, va_gc> * |
1091 | coverage_obj_fn (vec<constructor_elt, va_gc> *ctor, tree fn, | |
b724567e NS |
1092 | struct coverage_data const *data) |
1093 | { | |
1094 | tree init = build_fn_info (data, gcov_fn_info_type, gcov_info_var); | |
1095 | tree var = build_var (fn, gcov_fn_info_type, -1); | |
1096 | ||
1097 | DECL_INITIAL (var) = init; | |
1098 | varpool_finalize_decl (var); | |
1099 | ||
1100 | CONSTRUCTOR_APPEND_ELT (ctor, NULL, | |
1101 | build1 (ADDR_EXPR, gcov_fn_info_ptr_type, var)); | |
1102 | return ctor; | |
1103 | } | |
1104 | ||
1105 | /* Finalize the coverage data. Generates the array of pointers to | |
1106 | function objects from CTOR. Generate the gcov_info initializer. */ | |
1107 | ||
1108 | static void | |
9771b263 | 1109 | coverage_obj_finish (vec<constructor_elt, va_gc> *ctor) |
b724567e | 1110 | { |
9771b263 | 1111 | unsigned n_functions = vec_safe_length (ctor); |
b724567e NS |
1112 | tree fn_info_ary_type = build_array_type |
1113 | (build_qualified_type (gcov_fn_info_ptr_type, TYPE_QUAL_CONST), | |
1114 | build_index_type (size_int (n_functions - 1))); | |
1115 | tree fn_info_ary = build_decl (BUILTINS_LOCATION, VAR_DECL, NULL_TREE, | |
1116 | fn_info_ary_type); | |
1117 | char name_buf[32]; | |
1118 | ||
1119 | TREE_STATIC (fn_info_ary) = 1; | |
1120 | ASM_GENERATE_INTERNAL_LABEL (name_buf, "LPBX", 1); | |
1121 | DECL_NAME (fn_info_ary) = get_identifier (name_buf); | |
1122 | DECL_INITIAL (fn_info_ary) = build_constructor (fn_info_ary_type, ctor); | |
1123 | varpool_finalize_decl (fn_info_ary); | |
1124 | ||
1125 | DECL_INITIAL (gcov_info_var) | |
1126 | = build_info (TREE_TYPE (gcov_info_var), fn_info_ary); | |
1127 | varpool_finalize_decl (gcov_info_var); | |
1128 | } | |
1129 | ||
ca29da43 | 1130 | /* Perform file-level initialization. Read in data file, generate name |
efbb59b2 | 1131 | of notes file. */ |
ca29da43 NS |
1132 | |
1133 | void | |
159b3be1 | 1134 | coverage_init (const char *filename) |
ca29da43 NS |
1135 | { |
1136 | int len = strlen (filename); | |
b724567e | 1137 | int prefix_len = 0; |
b8698a0f | 1138 | |
103ff0d6 TJ |
1139 | /* Since coverage_init is invoked very early, before the pass |
1140 | manager, we need to set up the dumping explicitly. This is | |
1141 | similar to the handling in finish_optimization_passes. */ | |
47e0da37 DM |
1142 | int profile_pass_num = |
1143 | g->get_passes ()->get_pass_profile ()->static_pass_number; | |
1144 | g->get_dumps ()->dump_start (profile_pass_num, NULL); | |
103ff0d6 | 1145 | |
b724567e | 1146 | if (!profile_data_prefix && !IS_ABSOLUTE_PATH (filename)) |
2f908293 SP |
1147 | profile_data_prefix = getpwd (); |
1148 | ||
b724567e NS |
1149 | if (profile_data_prefix) |
1150 | prefix_len = strlen (profile_data_prefix); | |
ca29da43 | 1151 | |
796621e8 | 1152 | /* Name of da file. */ |
b8698a0f | 1153 | da_file_name = XNEWVEC (char, len + strlen (GCOV_DATA_SUFFIX) |
b724567e | 1154 | + prefix_len + 2); |
2f908293 SP |
1155 | |
1156 | if (profile_data_prefix) | |
1157 | { | |
b724567e NS |
1158 | memcpy (da_file_name, profile_data_prefix, prefix_len); |
1159 | da_file_name[prefix_len++] = '/'; | |
2f908293 | 1160 | } |
b724567e NS |
1161 | memcpy (da_file_name + prefix_len, filename, len); |
1162 | strcpy (da_file_name + prefix_len + len, GCOV_DATA_SUFFIX); | |
159b3be1 | 1163 | |
cb686b99 NS |
1164 | bbg_file_stamp = local_tick; |
1165 | ||
1166 | if (flag_branch_probabilities) | |
1167 | read_counts_file (); | |
1168 | ||
796621e8 | 1169 | /* Name of bbg file. */ |
b724567e NS |
1170 | if (flag_test_coverage && !flag_compare_debug) |
1171 | { | |
1172 | bbg_file_name = XNEWVEC (char, len + strlen (GCOV_NOTE_SUFFIX) + 1); | |
1173 | memcpy (bbg_file_name, filename, len); | |
1174 | strcpy (bbg_file_name + len, GCOV_NOTE_SUFFIX); | |
1175 | ||
1176 | if (!gcov_open (bbg_file_name, -1)) | |
1177 | { | |
1178 | error ("cannot open %s", bbg_file_name); | |
1179 | bbg_file_name = NULL; | |
1180 | } | |
1181 | else | |
1182 | { | |
1183 | gcov_write_unsigned (GCOV_NOTE_MAGIC); | |
1184 | gcov_write_unsigned (GCOV_VERSION); | |
cb686b99 | 1185 | gcov_write_unsigned (bbg_file_stamp); |
b724567e NS |
1186 | } |
1187 | } | |
103ff0d6 | 1188 | |
47e0da37 | 1189 | g->get_dumps ()->dump_finish (profile_pass_num); |
ca29da43 NS |
1190 | } |
1191 | ||
efbb59b2 | 1192 | /* Performs file-level cleanup. Close notes file, generate coverage |
ca29da43 NS |
1193 | variables and constructor. */ |
1194 | ||
1195 | void | |
159b3be1 | 1196 | coverage_finish (void) |
ca29da43 | 1197 | { |
b724567e NS |
1198 | if (bbg_file_name && gcov_close ()) |
1199 | unlink (bbg_file_name); | |
cb686b99 NS |
1200 | |
1201 | if (!flag_branch_probabilities && flag_test_coverage | |
1202 | && (!local_tick || local_tick == (unsigned)-1)) | |
1203 | /* Only remove the da file, if we're emitting coverage code and | |
1204 | cannot uniquely stamp it. If we can stamp it, libgcov will DTRT. */ | |
b724567e NS |
1205 | unlink (da_file_name); |
1206 | ||
1207 | if (coverage_obj_init ()) | |
ca29da43 | 1208 | { |
9771b263 | 1209 | vec<constructor_elt, va_gc> *fn_ctor = NULL; |
b724567e NS |
1210 | struct coverage_data *fn; |
1211 | ||
1212 | for (fn = functions_head; fn; fn = fn->next) | |
1213 | fn_ctor = coverage_obj_fn (fn_ctor, fn->fn_decl, fn); | |
1214 | coverage_obj_finish (fn_ctor); | |
ca29da43 | 1215 | } |
782f0db2 DM |
1216 | |
1217 | XDELETEVEC (da_file_name); | |
1218 | da_file_name = NULL; | |
ca29da43 NS |
1219 | } |
1220 | ||
ca29da43 | 1221 | #include "gt-coverage.h" |