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ca29da43 | 1 | /* Read and write coverage files, and associated functionality. |
23a5b65a | 2 | Copyright (C) 1990-2014 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. */ |
c203e8a7 | 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 | |
c203e8a7 | 218 | counts_hash = new hash_table<counts_entry> (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 | |
c203e8a7 | 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); | |
c203e8a7 TS |
294 | delete counts_hash; |
295 | counts_hash = NULL; | |
24a4a033 JH |
296 | break; |
297 | } | |
298 | else if (entry->summary.num != n_counts) | |
299 | { | |
10adac51 | 300 | error ("Profile data for function %u is corrupted", fn_ident); |
24a4a033 | 301 | error ("number of counters is %d instead of %d", entry->summary.num, n_counts); |
c203e8a7 TS |
302 | delete counts_hash; |
303 | counts_hash = NULL; | |
ca29da43 NS |
304 | break; |
305 | } | |
9b514d25 NS |
306 | else if (elt.ctr >= GCOV_COUNTERS_SUMMABLE) |
307 | { | |
24a4a033 JH |
308 | error ("cannot merge separate %s counters for function %u", |
309 | ctr_names[elt.ctr], fn_ident); | |
9b514d25 NS |
310 | goto skip_merge; |
311 | } | |
5366b186 | 312 | else |
ca29da43 | 313 | { |
5366b186 NS |
314 | entry->summary.runs += summary.ctrs[elt.ctr].runs; |
315 | entry->summary.sum_all += summary.ctrs[elt.ctr].sum_all; | |
316 | if (entry->summary.run_max < summary.ctrs[elt.ctr].run_max) | |
317 | entry->summary.run_max = summary.ctrs[elt.ctr].run_max; | |
318 | entry->summary.sum_max += summary.ctrs[elt.ctr].sum_max; | |
ca29da43 NS |
319 | } |
320 | for (ix = 0; ix != n_counts; ix++) | |
321 | entry->counts[ix] += gcov_read_counter (); | |
9b514d25 | 322 | skip_merge:; |
ca29da43 | 323 | } |
474f141e | 324 | gcov_sync (offset, length); |
24a4a033 | 325 | if ((is_error = gcov_is_error ())) |
00cf2913 | 326 | { |
971801ff | 327 | error (is_error < 0 ? "%qs has overflowed" : "%qs is corrupted", |
00cf2913 | 328 | da_file_name); |
c203e8a7 TS |
329 | delete counts_hash; |
330 | counts_hash = NULL; | |
00cf2913 NS |
331 | break; |
332 | } | |
7d63a2fa | 333 | } |
159b3be1 | 334 | |
ca29da43 NS |
335 | gcov_close (); |
336 | } | |
337 | ||
338 | /* Returns the counters for a particular tag. */ | |
339 | ||
340 | gcov_type * | |
cdb23767 | 341 | get_coverage_counts (unsigned counter, unsigned expected, |
10adac51 | 342 | unsigned cfg_checksum, unsigned lineno_checksum, |
cdb23767 | 343 | const struct gcov_ctr_summary **summary) |
ca29da43 NS |
344 | { |
345 | counts_entry_t *entry, elt; | |
346 | ||
71c0e7fc | 347 | /* No hash table, no counts. */ |
c203e8a7 | 348 | if (!counts_hash) |
ca29da43 NS |
349 | { |
350 | static int warned = 0; | |
351 | ||
103ff0d6 TJ |
352 | if (!warned++ && dump_enabled_p ()) |
353 | dump_printf_loc (MSG_OPTIMIZED_LOCATIONS, input_location, | |
354 | (flag_guess_branch_prob | |
753b9bc3 | 355 | ? "file %s not found, execution counts estimated\n" |
103ff0d6 | 356 | : "file %s not found, execution counts assumed to " |
e645e942 | 357 | "be zero\n"), |
103ff0d6 | 358 | da_file_name); |
ca29da43 NS |
359 | return NULL; |
360 | } | |
361 | ||
6d70e6be | 362 | elt.ident = current_function_funcdef_no + 1; |
cdb23767 | 363 | elt.ctr = counter; |
c203e8a7 | 364 | entry = counts_hash->find (&elt); |
5366b186 NS |
365 | if (!entry || !entry->summary.num) |
366 | /* The function was not emitted, or is weak and not chosen in the | |
367 | final executable. Silently fail, because there's nothing we | |
368 | can do about it. */ | |
369 | return NULL; | |
370 | ||
10adac51 | 371 | if (entry->cfg_checksum != cfg_checksum |
16c1c158 | 372 | || entry->summary.num != expected) |
24a4a033 | 373 | { |
16c1c158 | 374 | static int warned = 0; |
650cfcab | 375 | bool warning_printed = false; |
4f1e4960 | 376 | tree id = DECL_ASSEMBLER_NAME (current_function_decl); |
16c1c158 | 377 | |
10adac51 XDL |
378 | warning_printed = |
379 | warning_at (input_location, OPT_Wcoverage_mismatch, | |
5366b186 | 380 | "the control flow of function %qE does not match " |
10adac51 | 381 | "its profile data (counter %qs)", id, ctr_names[counter]); |
103ff0d6 | 382 | if (warning_printed && dump_enabled_p ()) |
16c1c158 | 383 | { |
103ff0d6 TJ |
384 | dump_printf_loc (MSG_OPTIMIZED_LOCATIONS, input_location, |
385 | "use -Wno-error=coverage-mismatch to tolerate " | |
386 | "the mismatch but performance may drop if the " | |
e645e942 | 387 | "function is hot\n"); |
650cfcab | 388 | |
1da2ed5f | 389 | if (!seen_error () |
650cfcab NV |
390 | && !warned++) |
391 | { | |
103ff0d6 | 392 | dump_printf_loc (MSG_OPTIMIZED_LOCATIONS, input_location, |
e645e942 TJ |
393 | "coverage mismatch ignored\n"); |
394 | dump_printf (MSG_OPTIMIZED_LOCATIONS, | |
395 | flag_guess_branch_prob | |
396 | ? G_("execution counts estimated\n") | |
397 | : G_("execution counts assumed to be zero\n")); | |
650cfcab | 398 | if (!flag_guess_branch_prob) |
e645e942 TJ |
399 | dump_printf (MSG_OPTIMIZED_LOCATIONS, |
400 | "this can result in poorly optimized code\n"); | |
650cfcab | 401 | } |
16c1c158 RG |
402 | } |
403 | ||
404 | return NULL; | |
ca29da43 | 405 | } |
5366b186 NS |
406 | else if (entry->lineno_checksum != lineno_checksum) |
407 | { | |
b724567e | 408 | warning (0, "source locations for function %qE have changed," |
5366b186 NS |
409 | " the profile data may be out of date", |
410 | DECL_ASSEMBLER_NAME (current_function_decl)); | |
411 | } | |
159b3be1 | 412 | |
cdb23767 NS |
413 | if (summary) |
414 | *summary = &entry->summary; | |
ca29da43 NS |
415 | |
416 | return entry->counts; | |
417 | } | |
cdb23767 | 418 | |
6356f892 | 419 | /* Allocate NUM counters of type COUNTER. Returns nonzero if the |
6d70e6be | 420 | allocation succeeded. */ |
cdb23767 | 421 | |
6d70e6be NS |
422 | int |
423 | coverage_counter_alloc (unsigned counter, unsigned num) | |
cdb23767 | 424 | { |
6d70e6be NS |
425 | if (no_coverage) |
426 | return 0; | |
159b3be1 | 427 | |
6d70e6be NS |
428 | if (!num) |
429 | return 1; | |
159b3be1 | 430 | |
5366b186 | 431 | if (!fn_v_ctrs[counter]) |
cdb23767 | 432 | { |
5366b186 NS |
433 | tree array_type = build_array_type (get_gcov_type (), NULL_TREE); |
434 | ||
435 | fn_v_ctrs[counter] | |
436 | = build_var (current_function_decl, array_type, counter); | |
cdb23767 | 437 | } |
5366b186 | 438 | |
6d70e6be NS |
439 | fn_b_ctrs[counter] = fn_n_ctrs[counter]; |
440 | fn_n_ctrs[counter] += num; | |
5366b186 | 441 | |
6d70e6be NS |
442 | fn_ctr_mask |= 1 << counter; |
443 | return 1; | |
444 | } | |
cdb23767 | 445 | |
6de9cd9a DN |
446 | /* Generate a tree to access COUNTER NO. */ |
447 | ||
448 | tree | |
449 | tree_coverage_counter_ref (unsigned counter, unsigned no) | |
450 | { | |
070e3969 | 451 | tree gcov_type_node = get_gcov_type (); |
6de9cd9a | 452 | |
341c100f | 453 | gcc_assert (no < fn_n_ctrs[counter] - fn_b_ctrs[counter]); |
6de9cd9a | 454 | |
5366b186 NS |
455 | no += fn_b_ctrs[counter]; |
456 | ||
6de9cd9a | 457 | /* "no" here is an array index, scaled to bytes later. */ |
5366b186 | 458 | return build4 (ARRAY_REF, gcov_type_node, fn_v_ctrs[counter], |
f81b1a3d | 459 | build_int_cst (integer_type_node, no), NULL, NULL); |
6de9cd9a | 460 | } |
fc9161c1 RG |
461 | |
462 | /* Generate a tree to access the address of COUNTER NO. */ | |
463 | ||
464 | tree | |
465 | tree_coverage_counter_addr (unsigned counter, unsigned no) | |
466 | { | |
467 | tree gcov_type_node = get_gcov_type (); | |
468 | ||
469 | gcc_assert (no < fn_n_ctrs[counter] - fn_b_ctrs[counter]); | |
5366b186 | 470 | no += fn_b_ctrs[counter]; |
628c189e | 471 | |
fc9161c1 RG |
472 | /* "no" here is an array index, scaled to bytes later. */ |
473 | return build_fold_addr_expr (build4 (ARRAY_REF, gcov_type_node, | |
5366b186 | 474 | fn_v_ctrs[counter], |
f81b1a3d | 475 | build_int_cst (integer_type_node, no), |
fc9161c1 RG |
476 | NULL, NULL)); |
477 | } | |
ca29da43 | 478 | \f |
10adac51 | 479 | |
ca29da43 | 480 | /* Generate a checksum for a string. CHKSUM is the current |
71c0e7fc | 481 | checksum. */ |
ca29da43 NS |
482 | |
483 | static unsigned | |
20c361f3 | 484 | coverage_checksum_string (unsigned chksum, const char *string) |
ca29da43 | 485 | { |
20c361f3 JH |
486 | int i; |
487 | char *dup = NULL; | |
488 | ||
489 | /* Look for everything that looks if it were produced by | |
5880f14f | 490 | get_file_function_name and zero out the second part |
20c361f3 JH |
491 | that may result from flag_random_seed. This is not critical |
492 | as the checksums are used only for sanity checking. */ | |
493 | for (i = 0; string[i]; i++) | |
ca29da43 | 494 | { |
2b557972 JH |
495 | int offset = 0; |
496 | if (!strncmp (string + i, "_GLOBAL__N_", 11)) | |
497 | offset = 11; | |
20c361f3 | 498 | if (!strncmp (string + i, "_GLOBAL__", 9)) |
2b557972 JH |
499 | offset = 9; |
500 | ||
501 | /* C++ namespaces do have scheme: | |
502 | _GLOBAL__N_<filename>_<wrongmagicnumber>_<magicnumber>functionname | |
503 | since filename might contain extra underscores there seems | |
504 | to be no better chance then walk all possible offsets looking | |
fa10beec | 505 | for magicnumber. */ |
2b557972 | 506 | if (offset) |
1f651229 JH |
507 | { |
508 | for (i = i + offset; string[i]; i++) | |
509 | if (string[i]=='_') | |
510 | { | |
511 | int y; | |
512 | ||
513 | for (y = 1; y < 9; y++) | |
514 | if (!(string[i + y] >= '0' && string[i + y] <= '9') | |
515 | && !(string[i + y] >= 'A' && string[i + y] <= 'F')) | |
516 | break; | |
517 | if (y != 9 || string[i + 9] != '_') | |
518 | continue; | |
519 | for (y = 10; y < 18; y++) | |
520 | if (!(string[i + y] >= '0' && string[i + y] <= '9') | |
521 | && !(string[i + y] >= 'A' && string[i + y] <= 'F')) | |
522 | break; | |
523 | if (y != 18) | |
524 | continue; | |
525 | if (!dup) | |
526 | string = dup = xstrdup (string); | |
527 | for (y = 10; y < 18; y++) | |
528 | dup[i + y] = '0'; | |
529 | } | |
530 | break; | |
531 | } | |
ca29da43 | 532 | } |
20c361f3 JH |
533 | |
534 | chksum = crc32_string (chksum, string); | |
04695783 | 535 | free (dup); |
159b3be1 | 536 | |
ca29da43 NS |
537 | return chksum; |
538 | } | |
539 | ||
540 | /* Compute checksum for the current function. We generate a CRC32. */ | |
541 | ||
10adac51 XDL |
542 | unsigned |
543 | coverage_compute_lineno_checksum (void) | |
ca29da43 | 544 | { |
a281759f PB |
545 | expanded_location xloc |
546 | = expand_location (DECL_SOURCE_LOCATION (current_function_decl)); | |
547 | unsigned chksum = xloc.line; | |
ca29da43 | 548 | |
a281759f | 549 | chksum = coverage_checksum_string (chksum, xloc.file); |
20c361f3 | 550 | chksum = coverage_checksum_string |
ca29da43 NS |
551 | (chksum, IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (current_function_decl))); |
552 | ||
553 | return chksum; | |
554 | } | |
10adac51 | 555 | |
2fa3d31b JH |
556 | /* Compute profile ID. This is better to be unique in whole program. */ |
557 | ||
558 | unsigned | |
559 | coverage_compute_profile_id (struct cgraph_node *n) | |
560 | { | |
cb90235d | 561 | unsigned chksum; |
2fa3d31b | 562 | |
cb90235d JH |
563 | /* Externally visible symbols have unique name. */ |
564 | if (TREE_PUBLIC (n->decl) || DECL_EXTERNAL (n->decl)) | |
565 | { | |
566 | chksum = coverage_checksum_string | |
567 | (0, IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (n->decl))); | |
568 | } | |
569 | else | |
570 | { | |
571 | expanded_location xloc | |
572 | = expand_location (DECL_SOURCE_LOCATION (n->decl)); | |
573 | ||
574 | chksum = xloc.line; | |
575 | chksum = coverage_checksum_string (chksum, xloc.file); | |
576 | chksum = coverage_checksum_string | |
577 | (chksum, IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (n->decl))); | |
578 | if (first_global_object_name) | |
579 | chksum = coverage_checksum_string | |
580 | (chksum, first_global_object_name); | |
581 | chksum = coverage_checksum_string | |
582 | (chksum, aux_base_name); | |
583 | } | |
2fa3d31b JH |
584 | |
585 | /* Non-negative integers are hopefully small enough to fit in all targets. */ | |
586 | return chksum & 0x7fffffff; | |
587 | } | |
588 | ||
a96bf0d3 | 589 | /* Compute cfg checksum for the function FN given as argument. |
10adac51 XDL |
590 | The checksum is calculated carefully so that |
591 | source code changes that doesn't affect the control flow graph | |
592 | won't change the checksum. | |
593 | This is to make the profile data useable across source code change. | |
594 | The downside of this is that the compiler may use potentially | |
595 | wrong profile data - that the source code change has non-trivial impact | |
596 | on the validity of profile data (e.g. the reversed condition) | |
597 | but the compiler won't detect the change and use the wrong profile data. */ | |
598 | ||
599 | unsigned | |
a96bf0d3 | 600 | coverage_compute_cfg_checksum (struct function *fn) |
10adac51 XDL |
601 | { |
602 | basic_block bb; | |
a96bf0d3 | 603 | unsigned chksum = n_basic_blocks_for_fn (fn); |
10adac51 | 604 | |
a96bf0d3 | 605 | FOR_EACH_BB_FN (bb, fn) |
10adac51 XDL |
606 | { |
607 | edge e; | |
608 | edge_iterator ei; | |
609 | chksum = crc32_byte (chksum, bb->index); | |
610 | FOR_EACH_EDGE (e, ei, bb->succs) | |
611 | { | |
612 | chksum = crc32_byte (chksum, e->dest->index); | |
613 | } | |
614 | } | |
615 | ||
616 | return chksum; | |
617 | } | |
ca29da43 | 618 | \f |
efbb59b2 | 619 | /* Begin output to the notes file for the current function. |
b724567e | 620 | Writes the function header. Returns nonzero if data should be output. */ |
ca29da43 NS |
621 | |
622 | int | |
b724567e | 623 | coverage_begin_function (unsigned lineno_checksum, unsigned cfg_checksum) |
ca29da43 | 624 | { |
b724567e NS |
625 | expanded_location xloc; |
626 | unsigned long offset; | |
627 | ||
2f908293 SP |
628 | /* We don't need to output .gcno file unless we're under -ftest-coverage |
629 | (e.g. -fprofile-arcs/generate/use don't need .gcno to work). */ | |
b724567e | 630 | if (no_coverage || !bbg_file_name) |
6d70e6be | 631 | return 0; |
159b3be1 | 632 | |
b724567e | 633 | xloc = expand_location (DECL_SOURCE_LOCATION (current_function_decl)); |
10adac51 | 634 | |
b724567e NS |
635 | /* Announce function */ |
636 | offset = gcov_write_tag (GCOV_TAG_FUNCTION); | |
637 | gcov_write_unsigned (current_function_funcdef_no + 1); | |
638 | gcov_write_unsigned (lineno_checksum); | |
639 | gcov_write_unsigned (cfg_checksum); | |
640 | gcov_write_string (IDENTIFIER_POINTER | |
641 | (DECL_ASSEMBLER_NAME (current_function_decl))); | |
642 | gcov_write_string (xloc.file); | |
643 | gcov_write_unsigned (xloc.line); | |
644 | gcov_write_length (offset); | |
ca29da43 | 645 | |
ca29da43 NS |
646 | return !gcov_is_error (); |
647 | } | |
648 | ||
649 | /* Finish coverage data for the current function. Verify no output | |
650 | error has occurred. Save function coverage counts. */ | |
651 | ||
652 | void | |
10adac51 | 653 | coverage_end_function (unsigned lineno_checksum, unsigned cfg_checksum) |
ca29da43 NS |
654 | { |
655 | unsigned i; | |
159b3be1 | 656 | |
b724567e | 657 | if (bbg_file_name && gcov_is_error ()) |
159b3be1 | 658 | { |
d4ee4d25 | 659 | warning (0, "error writing %qs", bbg_file_name); |
b724567e NS |
660 | unlink (bbg_file_name); |
661 | bbg_file_name = NULL; | |
ca29da43 | 662 | } |
cdb23767 | 663 | |
2ac69a0c | 664 | if (fn_ctr_mask) |
cdb23767 | 665 | { |
2ac69a0c NS |
666 | struct coverage_data *item = 0; |
667 | ||
668 | /* If the function is extern (i.e. extern inline), then we won't | |
669 | be outputting it, so don't chain it onto the function | |
670 | list. */ | |
671 | if (!DECL_EXTERNAL (current_function_decl)) | |
672 | { | |
766090c2 | 673 | item = ggc_alloc<coverage_data> (); |
2ac69a0c NS |
674 | |
675 | item->ident = current_function_funcdef_no + 1; | |
676 | item->lineno_checksum = lineno_checksum; | |
677 | item->cfg_checksum = cfg_checksum; | |
678 | ||
679 | item->fn_decl = current_function_decl; | |
680 | item->next = 0; | |
681 | *functions_tail = item; | |
682 | functions_tail = &item->next; | |
683 | } | |
10adac51 | 684 | |
cdb23767 NS |
685 | for (i = 0; i != GCOV_COUNTERS; i++) |
686 | { | |
5366b186 | 687 | tree var = fn_v_ctrs[i]; |
2ac69a0c NS |
688 | |
689 | if (item) | |
690 | item->ctr_vars[i] = var; | |
5366b186 NS |
691 | if (var) |
692 | { | |
693 | tree array_type = build_index_type (size_int (fn_n_ctrs[i] - 1)); | |
694 | array_type = build_array_type (get_gcov_type (), array_type); | |
695 | TREE_TYPE (var) = array_type; | |
696 | DECL_SIZE (var) = TYPE_SIZE (array_type); | |
697 | DECL_SIZE_UNIT (var) = TYPE_SIZE_UNIT (array_type); | |
698 | varpool_finalize_decl (var); | |
699 | } | |
2ac69a0c | 700 | |
5366b186 NS |
701 | fn_b_ctrs[i] = fn_n_ctrs[i] = 0; |
702 | fn_v_ctrs[i] = NULL_TREE; | |
cdb23767 NS |
703 | } |
704 | prg_ctr_mask |= fn_ctr_mask; | |
705 | fn_ctr_mask = 0; | |
706 | } | |
ca29da43 NS |
707 | } |
708 | ||
5366b186 | 709 | /* Build a coverage variable of TYPE for function FN_DECL. If COUNTER |
0e485da0 | 710 | >= 0 it is a counter array, otherwise it is the function structure. */ |
ca29da43 | 711 | |
ca29da43 | 712 | static tree |
5366b186 NS |
713 | build_var (tree fn_decl, tree type, int counter) |
714 | { | |
715 | tree var = build_decl (BUILTINS_LOCATION, VAR_DECL, NULL_TREE, type); | |
9e66e106 JJ |
716 | const char *fn_name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (fn_decl)); |
717 | char *buf; | |
718 | size_t fn_name_len, len; | |
719 | ||
720 | fn_name = targetm.strip_name_encoding (fn_name); | |
721 | fn_name_len = strlen (fn_name); | |
722 | buf = XALLOCAVEC (char, fn_name_len + 8 + sizeof (int) * 3); | |
5366b186 | 723 | |
5366b186 | 724 | if (counter < 0) |
9e66e106 | 725 | strcpy (buf, "__gcov__"); |
5366b186 | 726 | else |
9e66e106 JJ |
727 | sprintf (buf, "__gcov%u_", counter); |
728 | len = strlen (buf); | |
729 | #ifndef NO_DOT_IN_LABEL | |
730 | buf[len - 1] = '.'; | |
731 | #elif !defined NO_DOLLAR_IN_LABEL | |
732 | buf[len - 1] = '$'; | |
733 | #endif | |
734 | memcpy (buf + len, fn_name, fn_name_len + 1); | |
5366b186 | 735 | DECL_NAME (var) = get_identifier (buf); |
89b0c303 NS |
736 | TREE_STATIC (var) = 1; |
737 | TREE_ADDRESSABLE (var) = 1; | |
400a4f6c | 738 | DECL_NONALIASED (var) = 1; |
89b0c303 | 739 | DECL_ALIGN (var) = TYPE_ALIGN (type); |
5366b186 NS |
740 | |
741 | return var; | |
742 | } | |
743 | ||
744 | /* Creates the gcov_fn_info RECORD_TYPE. */ | |
745 | ||
746 | static void | |
747 | build_fn_info_type (tree type, unsigned counters, tree gcov_info_type) | |
ca29da43 | 748 | { |
5366b186 | 749 | tree ctr_info = lang_hooks.types.make_type (RECORD_TYPE); |
ca29da43 | 750 | tree field, fields; |
cdb23767 | 751 | tree array_type; |
159b3be1 | 752 | |
5366b186 NS |
753 | gcc_assert (counters); |
754 | ||
755 | /* ctr_info::num */ | |
756 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
757 | get_gcov_unsigned_t ()); | |
758 | fields = field; | |
759 | ||
760 | /* ctr_info::values */ | |
761 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
762 | build_pointer_type (get_gcov_type ())); | |
763 | DECL_CHAIN (field) = fields; | |
764 | fields = field; | |
765 | ||
766 | finish_builtin_struct (ctr_info, "__gcov_ctr_info", fields, NULL_TREE); | |
767 | ||
768 | /* key */ | |
769 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
770 | build_pointer_type (build_qualified_type | |
771 | (gcov_info_type, TYPE_QUAL_CONST))); | |
772 | fields = field; | |
773 | ||
796621e8 | 774 | /* ident */ |
5366b186 NS |
775 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, |
776 | get_gcov_unsigned_t ()); | |
777 | DECL_CHAIN (field) = fields; | |
778 | fields = field; | |
779 | ||
10adac51 | 780 | /* lineno_checksum */ |
5366b186 NS |
781 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, |
782 | get_gcov_unsigned_t ()); | |
910ad8de | 783 | DECL_CHAIN (field) = fields; |
ca29da43 NS |
784 | fields = field; |
785 | ||
10adac51 | 786 | /* cfg checksum */ |
5366b186 NS |
787 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, |
788 | get_gcov_unsigned_t ()); | |
10adac51 XDL |
789 | DECL_CHAIN (field) = fields; |
790 | fields = field; | |
791 | ||
f81b1a3d | 792 | array_type = build_index_type (size_int (counters - 1)); |
5366b186 | 793 | array_type = build_array_type (ctr_info, array_type); |
159b3be1 | 794 | |
ca29da43 | 795 | /* counters */ |
5366b186 | 796 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, array_type); |
910ad8de | 797 | DECL_CHAIN (field) = fields; |
ca29da43 NS |
798 | fields = field; |
799 | ||
cdb23767 | 800 | finish_builtin_struct (type, "__gcov_fn_info", fields, NULL_TREE); |
ca29da43 NS |
801 | } |
802 | ||
b724567e NS |
803 | /* Returns a CONSTRUCTOR for a gcov_fn_info. DATA is |
804 | the coverage data for the function and TYPE is the gcov_fn_info | |
805 | RECORD_TYPE. KEY is the object file key. */ | |
cdb23767 | 806 | |
ca29da43 | 807 | static tree |
b724567e | 808 | build_fn_info (const struct coverage_data *data, tree type, tree key) |
ca29da43 | 809 | { |
cdb23767 | 810 | tree fields = TYPE_FIELDS (type); |
5366b186 | 811 | tree ctr_type; |
cdb23767 | 812 | unsigned ix; |
9771b263 DN |
813 | vec<constructor_elt, va_gc> *v1 = NULL; |
814 | vec<constructor_elt, va_gc> *v2 = NULL; | |
159b3be1 | 815 | |
5366b186 NS |
816 | /* key */ |
817 | CONSTRUCTOR_APPEND_ELT (v1, fields, | |
818 | build1 (ADDR_EXPR, TREE_TYPE (fields), key)); | |
819 | fields = DECL_CHAIN (fields); | |
820 | ||
796621e8 | 821 | /* ident */ |
f9b36bb3 KH |
822 | CONSTRUCTOR_APPEND_ELT (v1, fields, |
823 | build_int_cstu (get_gcov_unsigned_t (), | |
b724567e | 824 | data->ident)); |
910ad8de | 825 | fields = DECL_CHAIN (fields); |
159b3be1 | 826 | |
10adac51 XDL |
827 | /* lineno_checksum */ |
828 | CONSTRUCTOR_APPEND_ELT (v1, fields, | |
829 | build_int_cstu (get_gcov_unsigned_t (), | |
b724567e | 830 | data->lineno_checksum)); |
10adac51 XDL |
831 | fields = DECL_CHAIN (fields); |
832 | ||
833 | /* cfg_checksum */ | |
f9b36bb3 KH |
834 | CONSTRUCTOR_APPEND_ELT (v1, fields, |
835 | build_int_cstu (get_gcov_unsigned_t (), | |
b724567e | 836 | data->cfg_checksum)); |
910ad8de | 837 | fields = DECL_CHAIN (fields); |
159b3be1 | 838 | |
ca29da43 | 839 | /* counters */ |
5366b186 | 840 | ctr_type = TREE_TYPE (TREE_TYPE (fields)); |
cdb23767 NS |
841 | for (ix = 0; ix != GCOV_COUNTERS; ix++) |
842 | if (prg_ctr_mask & (1 << ix)) | |
5366b186 | 843 | { |
9771b263 | 844 | vec<constructor_elt, va_gc> *ctr = NULL; |
b724567e | 845 | tree var = data->ctr_vars[ix]; |
5366b186 NS |
846 | unsigned count = 0; |
847 | ||
848 | if (var) | |
849 | count | |
9439e9a1 | 850 | = tree_to_shwi (TYPE_MAX_VALUE (TYPE_DOMAIN (TREE_TYPE (var)))) |
5366b186 NS |
851 | + 1; |
852 | ||
853 | CONSTRUCTOR_APPEND_ELT (ctr, TYPE_FIELDS (ctr_type), | |
854 | build_int_cstu (get_gcov_unsigned_t (), | |
855 | count)); | |
856 | ||
857 | if (var) | |
858 | CONSTRUCTOR_APPEND_ELT (ctr, DECL_CHAIN (TYPE_FIELDS (ctr_type)), | |
859 | build_fold_addr_expr (var)); | |
860 | ||
861 | CONSTRUCTOR_APPEND_ELT (v2, NULL, build_constructor (ctr_type, ctr)); | |
862 | } | |
863 | ||
f9b36bb3 KH |
864 | CONSTRUCTOR_APPEND_ELT (v1, fields, |
865 | build_constructor (TREE_TYPE (fields), v2)); | |
159b3be1 | 866 | |
f9b36bb3 | 867 | return build_constructor (type, v1); |
ca29da43 NS |
868 | } |
869 | ||
b724567e NS |
870 | /* Create gcov_info struct. TYPE is the incomplete RECORD_TYPE to be |
871 | completed, and FN_INFO_PTR_TYPE is a pointer to the function info type. */ | |
cdb23767 | 872 | |
5366b186 | 873 | static void |
b724567e | 874 | build_info_type (tree type, tree fn_info_ptr_type) |
ca29da43 | 875 | { |
cdb23767 | 876 | tree field, fields = NULL_TREE; |
b724567e | 877 | tree merge_fn_type; |
9b514d25 | 878 | |
5366b186 NS |
879 | /* Version ident */ |
880 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
881 | get_gcov_unsigned_t ()); | |
910ad8de | 882 | DECL_CHAIN (field) = fields; |
ca29da43 NS |
883 | fields = field; |
884 | ||
5366b186 NS |
885 | /* next pointer */ |
886 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
887 | build_pointer_type (build_qualified_type | |
888 | (type, TYPE_QUAL_CONST))); | |
910ad8de | 889 | DECL_CHAIN (field) = fields; |
ca29da43 NS |
890 | fields = field; |
891 | ||
5366b186 NS |
892 | /* stamp */ |
893 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
894 | get_gcov_unsigned_t ()); | |
910ad8de | 895 | DECL_CHAIN (field) = fields; |
09780dfb ZD |
896 | fields = field; |
897 | ||
5366b186 NS |
898 | /* Filename */ |
899 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
900 | build_pointer_type (build_qualified_type | |
901 | (char_type_node, TYPE_QUAL_CONST))); | |
902 | DECL_CHAIN (field) = fields; | |
903 | fields = field; | |
ca29da43 | 904 | |
5366b186 NS |
905 | /* merge fn array */ |
906 | merge_fn_type | |
907 | = build_function_type_list (void_type_node, | |
908 | build_pointer_type (get_gcov_type ()), | |
909 | get_gcov_unsigned_t (), NULL_TREE); | |
910 | merge_fn_type | |
911 | = build_array_type (build_pointer_type (merge_fn_type), | |
912 | build_index_type (size_int (GCOV_COUNTERS - 1))); | |
913 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
914 | merge_fn_type); | |
915 | DECL_CHAIN (field) = fields; | |
916 | fields = field; | |
917 | ||
918 | /* n_functions */ | |
919 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
920 | get_gcov_unsigned_t ()); | |
921 | DECL_CHAIN (field) = fields; | |
922 | fields = field; | |
923 | ||
b724567e NS |
924 | /* function_info pointer pointer */ |
925 | fn_info_ptr_type = build_pointer_type | |
926 | (build_qualified_type (fn_info_ptr_type, TYPE_QUAL_CONST)); | |
5366b186 | 927 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, |
b724567e | 928 | fn_info_ptr_type); |
5366b186 NS |
929 | DECL_CHAIN (field) = fields; |
930 | fields = field; | |
09780dfb | 931 | |
5366b186 | 932 | finish_builtin_struct (type, "__gcov_info", fields, NULL_TREE); |
ca29da43 NS |
933 | } |
934 | ||
b724567e NS |
935 | /* Returns a CONSTRUCTOR for the gcov_info object. INFO_TYPE is the |
936 | gcov_info structure type, FN_ARY is the array of pointers to | |
937 | function info objects. */ | |
cdb23767 | 938 | |
ca29da43 | 939 | static tree |
b724567e | 940 | build_info (tree info_type, tree fn_ary) |
ca29da43 | 941 | { |
5366b186 | 942 | tree info_fields = TYPE_FIELDS (info_type); |
b724567e | 943 | tree merge_fn_type, n_funcs; |
5366b186 | 944 | unsigned ix; |
cdb23767 | 945 | tree filename_string; |
2f908293 | 946 | int da_file_name_len; |
9771b263 DN |
947 | vec<constructor_elt, va_gc> *v1 = NULL; |
948 | vec<constructor_elt, va_gc> *v2 = NULL; | |
159b3be1 | 949 | |
cdb23767 | 950 | /* Version ident */ |
5366b186 NS |
951 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, |
952 | build_int_cstu (TREE_TYPE (info_fields), | |
953 | GCOV_VERSION)); | |
954 | info_fields = DECL_CHAIN (info_fields); | |
159b3be1 | 955 | |
ca29da43 | 956 | /* next -- NULL */ |
5366b186 NS |
957 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, null_pointer_node); |
958 | info_fields = DECL_CHAIN (info_fields); | |
959 | ||
dd486eb2 | 960 | /* stamp */ |
5366b186 NS |
961 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, |
962 | build_int_cstu (TREE_TYPE (info_fields), | |
cb686b99 | 963 | bbg_file_stamp)); |
5366b186 | 964 | info_fields = DECL_CHAIN (info_fields); |
dd486eb2 | 965 | |
ca29da43 | 966 | /* Filename */ |
2f908293 SP |
967 | da_file_name_len = strlen (da_file_name); |
968 | filename_string = build_string (da_file_name_len + 1, da_file_name); | |
4a90aeeb | 969 | TREE_TYPE (filename_string) = build_array_type |
f81b1a3d | 970 | (char_type_node, build_index_type (size_int (da_file_name_len))); |
5366b186 NS |
971 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, |
972 | build1 (ADDR_EXPR, TREE_TYPE (info_fields), | |
973 | filename_string)); | |
974 | info_fields = DECL_CHAIN (info_fields); | |
159b3be1 | 975 | |
5366b186 NS |
976 | /* merge fn array -- NULL slots indicate unmeasured counters */ |
977 | merge_fn_type = TREE_TYPE (TREE_TYPE (info_fields)); | |
978 | for (ix = 0; ix != GCOV_COUNTERS; ix++) | |
ca29da43 | 979 | { |
5366b186 | 980 | tree ptr = null_pointer_node; |
159b3be1 | 981 | |
5366b186 NS |
982 | if ((1u << ix) & prg_ctr_mask) |
983 | { | |
984 | tree merge_fn = build_decl (BUILTINS_LOCATION, | |
985 | FUNCTION_DECL, | |
986 | get_identifier (ctr_merge_functions[ix]), | |
987 | TREE_TYPE (merge_fn_type)); | |
988 | DECL_EXTERNAL (merge_fn) = 1; | |
989 | TREE_PUBLIC (merge_fn) = 1; | |
990 | DECL_ARTIFICIAL (merge_fn) = 1; | |
991 | TREE_NOTHROW (merge_fn) = 1; | |
992 | /* Initialize assembler name so we can stream out. */ | |
993 | DECL_ASSEMBLER_NAME (merge_fn); | |
994 | ptr = build1 (ADDR_EXPR, merge_fn_type, merge_fn); | |
995 | } | |
996 | CONSTRUCTOR_APPEND_ELT (v2, NULL, ptr); | |
ca29da43 | 997 | } |
5366b186 NS |
998 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, |
999 | build_constructor (TREE_TYPE (info_fields), v2)); | |
1000 | info_fields = DECL_CHAIN (info_fields); | |
1001 | ||
1002 | /* n_functions */ | |
b724567e NS |
1003 | n_funcs = TYPE_MAX_VALUE (TYPE_DOMAIN (TREE_TYPE (fn_ary))); |
1004 | n_funcs = fold_build2 (PLUS_EXPR, TREE_TYPE (info_fields), | |
1005 | n_funcs, size_one_node); | |
1006 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, n_funcs); | |
5366b186 | 1007 | info_fields = DECL_CHAIN (info_fields); |
5366b186 | 1008 | |
b724567e | 1009 | /* functions */ |
5366b186 | 1010 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, |
b724567e NS |
1011 | build1 (ADDR_EXPR, TREE_TYPE (info_fields), fn_ary)); |
1012 | info_fields = DECL_CHAIN (info_fields); | |
1013 | ||
1014 | gcc_assert (!info_fields); | |
5366b186 | 1015 | return build_constructor (info_type, v1); |
ca29da43 NS |
1016 | } |
1017 | ||
d6d7eee1 GW |
1018 | /* Generate the constructor function to call __gcov_init. */ |
1019 | ||
1020 | static void | |
1021 | build_init_ctor (tree gcov_info_type) | |
1022 | { | |
1023 | tree ctor, stmt, init_fn; | |
1024 | ||
1025 | /* Build a decl for __gcov_init. */ | |
1026 | init_fn = build_pointer_type (gcov_info_type); | |
1027 | init_fn = build_function_type_list (void_type_node, init_fn, NULL); | |
1028 | init_fn = build_decl (BUILTINS_LOCATION, FUNCTION_DECL, | |
1029 | get_identifier ("__gcov_init"), init_fn); | |
1030 | TREE_PUBLIC (init_fn) = 1; | |
1031 | DECL_EXTERNAL (init_fn) = 1; | |
1032 | DECL_ASSEMBLER_NAME (init_fn); | |
1033 | ||
1034 | /* Generate a call to __gcov_init(&gcov_info). */ | |
1035 | ctor = NULL; | |
1036 | stmt = build_fold_addr_expr (gcov_info_var); | |
1037 | stmt = build_call_expr (init_fn, 1, stmt); | |
1038 | append_to_statement_list (stmt, &ctor); | |
1039 | ||
1040 | /* Generate a constructor to run it. */ | |
1041 | cgraph_build_static_cdtor ('I', ctor, DEFAULT_INIT_PRIORITY); | |
1042 | } | |
1043 | ||
b724567e NS |
1044 | /* Create the gcov_info types and object. Generate the constructor |
1045 | function to call __gcov_init. Does not generate the initializer | |
1046 | for the object. Returns TRUE if coverage data is being emitted. */ | |
ca29da43 | 1047 | |
b724567e NS |
1048 | static bool |
1049 | coverage_obj_init (void) | |
ca29da43 | 1050 | { |
d6d7eee1 | 1051 | tree gcov_info_type; |
b724567e | 1052 | unsigned n_counters = 0; |
5366b186 | 1053 | unsigned ix; |
b724567e NS |
1054 | struct coverage_data *fn; |
1055 | struct coverage_data **fn_prev; | |
c9b9aa64 | 1056 | char name_buf[32]; |
ca29da43 | 1057 | |
6d70e6be | 1058 | no_coverage = 1; /* Disable any further coverage. */ |
159b3be1 | 1059 | |
cdb23767 | 1060 | if (!prg_ctr_mask) |
b724567e | 1061 | return false; |
159b3be1 | 1062 | |
5366b186 NS |
1063 | if (cgraph_dump_file) |
1064 | fprintf (cgraph_dump_file, "Using data file %s\n", da_file_name); | |
ca29da43 | 1065 | |
b724567e | 1066 | /* Prune functions. */ |
5366b186 NS |
1067 | for (fn_prev = &functions_head; (fn = *fn_prev);) |
1068 | if (DECL_STRUCT_FUNCTION (fn->fn_decl)) | |
b724567e | 1069 | fn_prev = &fn->next; |
5366b186 NS |
1070 | else |
1071 | /* The function is not being emitted, remove from list. */ | |
1072 | *fn_prev = fn->next; | |
b724567e | 1073 | |
0f9fb22f JJ |
1074 | if (functions_head == NULL) |
1075 | return false; | |
1076 | ||
b724567e NS |
1077 | for (ix = 0; ix != GCOV_COUNTERS; ix++) |
1078 | if ((1u << ix) & prg_ctr_mask) | |
1079 | n_counters++; | |
5366b186 NS |
1080 | |
1081 | /* Build the info and fn_info types. These are mutually recursive. */ | |
1082 | gcov_info_type = lang_hooks.types.make_type (RECORD_TYPE); | |
b724567e NS |
1083 | gcov_fn_info_type = lang_hooks.types.make_type (RECORD_TYPE); |
1084 | gcov_fn_info_ptr_type = build_pointer_type | |
1085 | (build_qualified_type (gcov_fn_info_type, TYPE_QUAL_CONST)); | |
1086 | build_fn_info_type (gcov_fn_info_type, n_counters, gcov_info_type); | |
1087 | build_info_type (gcov_info_type, gcov_fn_info_ptr_type); | |
5366b186 NS |
1088 | |
1089 | /* Build the gcov info var, this is referred to in its own | |
1090 | initializer. */ | |
b724567e NS |
1091 | gcov_info_var = build_decl (BUILTINS_LOCATION, |
1092 | VAR_DECL, NULL_TREE, gcov_info_type); | |
1093 | TREE_STATIC (gcov_info_var) = 1; | |
c9b9aa64 | 1094 | ASM_GENERATE_INTERNAL_LABEL (name_buf, "LPBX", 0); |
b724567e | 1095 | DECL_NAME (gcov_info_var) = get_identifier (name_buf); |
ca29da43 | 1096 | |
d6d7eee1 | 1097 | build_init_ctor (gcov_info_type); |
b724567e NS |
1098 | |
1099 | return true; | |
ca29da43 | 1100 | } |
b724567e NS |
1101 | |
1102 | /* Generate the coverage function info for FN and DATA. Append a | |
1103 | pointer to that object to CTOR and return the appended CTOR. */ | |
1104 | ||
9771b263 DN |
1105 | static vec<constructor_elt, va_gc> * |
1106 | coverage_obj_fn (vec<constructor_elt, va_gc> *ctor, tree fn, | |
b724567e NS |
1107 | struct coverage_data const *data) |
1108 | { | |
1109 | tree init = build_fn_info (data, gcov_fn_info_type, gcov_info_var); | |
1110 | tree var = build_var (fn, gcov_fn_info_type, -1); | |
1111 | ||
1112 | DECL_INITIAL (var) = init; | |
1113 | varpool_finalize_decl (var); | |
1114 | ||
1115 | CONSTRUCTOR_APPEND_ELT (ctor, NULL, | |
1116 | build1 (ADDR_EXPR, gcov_fn_info_ptr_type, var)); | |
1117 | return ctor; | |
1118 | } | |
1119 | ||
1120 | /* Finalize the coverage data. Generates the array of pointers to | |
1121 | function objects from CTOR. Generate the gcov_info initializer. */ | |
1122 | ||
1123 | static void | |
9771b263 | 1124 | coverage_obj_finish (vec<constructor_elt, va_gc> *ctor) |
b724567e | 1125 | { |
9771b263 | 1126 | unsigned n_functions = vec_safe_length (ctor); |
b724567e NS |
1127 | tree fn_info_ary_type = build_array_type |
1128 | (build_qualified_type (gcov_fn_info_ptr_type, TYPE_QUAL_CONST), | |
1129 | build_index_type (size_int (n_functions - 1))); | |
1130 | tree fn_info_ary = build_decl (BUILTINS_LOCATION, VAR_DECL, NULL_TREE, | |
1131 | fn_info_ary_type); | |
1132 | char name_buf[32]; | |
1133 | ||
1134 | TREE_STATIC (fn_info_ary) = 1; | |
1135 | ASM_GENERATE_INTERNAL_LABEL (name_buf, "LPBX", 1); | |
1136 | DECL_NAME (fn_info_ary) = get_identifier (name_buf); | |
1137 | DECL_INITIAL (fn_info_ary) = build_constructor (fn_info_ary_type, ctor); | |
1138 | varpool_finalize_decl (fn_info_ary); | |
1139 | ||
1140 | DECL_INITIAL (gcov_info_var) | |
1141 | = build_info (TREE_TYPE (gcov_info_var), fn_info_ary); | |
1142 | varpool_finalize_decl (gcov_info_var); | |
1143 | } | |
1144 | ||
ca29da43 | 1145 | /* Perform file-level initialization. Read in data file, generate name |
efbb59b2 | 1146 | of notes file. */ |
ca29da43 NS |
1147 | |
1148 | void | |
159b3be1 | 1149 | coverage_init (const char *filename) |
ca29da43 NS |
1150 | { |
1151 | int len = strlen (filename); | |
b724567e | 1152 | int prefix_len = 0; |
b8698a0f | 1153 | |
103ff0d6 TJ |
1154 | /* Since coverage_init is invoked very early, before the pass |
1155 | manager, we need to set up the dumping explicitly. This is | |
1156 | similar to the handling in finish_optimization_passes. */ | |
47e0da37 DM |
1157 | int profile_pass_num = |
1158 | g->get_passes ()->get_pass_profile ()->static_pass_number; | |
1159 | g->get_dumps ()->dump_start (profile_pass_num, NULL); | |
103ff0d6 | 1160 | |
b724567e | 1161 | if (!profile_data_prefix && !IS_ABSOLUTE_PATH (filename)) |
2f908293 SP |
1162 | profile_data_prefix = getpwd (); |
1163 | ||
b724567e NS |
1164 | if (profile_data_prefix) |
1165 | prefix_len = strlen (profile_data_prefix); | |
ca29da43 | 1166 | |
796621e8 | 1167 | /* Name of da file. */ |
b8698a0f | 1168 | da_file_name = XNEWVEC (char, len + strlen (GCOV_DATA_SUFFIX) |
b724567e | 1169 | + prefix_len + 2); |
2f908293 SP |
1170 | |
1171 | if (profile_data_prefix) | |
1172 | { | |
b724567e NS |
1173 | memcpy (da_file_name, profile_data_prefix, prefix_len); |
1174 | da_file_name[prefix_len++] = '/'; | |
2f908293 | 1175 | } |
b724567e NS |
1176 | memcpy (da_file_name + prefix_len, filename, len); |
1177 | strcpy (da_file_name + prefix_len + len, GCOV_DATA_SUFFIX); | |
159b3be1 | 1178 | |
cb686b99 NS |
1179 | bbg_file_stamp = local_tick; |
1180 | ||
1181 | if (flag_branch_probabilities) | |
1182 | read_counts_file (); | |
1183 | ||
796621e8 | 1184 | /* Name of bbg file. */ |
b724567e NS |
1185 | if (flag_test_coverage && !flag_compare_debug) |
1186 | { | |
1187 | bbg_file_name = XNEWVEC (char, len + strlen (GCOV_NOTE_SUFFIX) + 1); | |
1188 | memcpy (bbg_file_name, filename, len); | |
1189 | strcpy (bbg_file_name + len, GCOV_NOTE_SUFFIX); | |
1190 | ||
1191 | if (!gcov_open (bbg_file_name, -1)) | |
1192 | { | |
1193 | error ("cannot open %s", bbg_file_name); | |
1194 | bbg_file_name = NULL; | |
1195 | } | |
1196 | else | |
1197 | { | |
1198 | gcov_write_unsigned (GCOV_NOTE_MAGIC); | |
1199 | gcov_write_unsigned (GCOV_VERSION); | |
cb686b99 | 1200 | gcov_write_unsigned (bbg_file_stamp); |
b724567e NS |
1201 | } |
1202 | } | |
103ff0d6 | 1203 | |
47e0da37 | 1204 | g->get_dumps ()->dump_finish (profile_pass_num); |
ca29da43 NS |
1205 | } |
1206 | ||
efbb59b2 | 1207 | /* Performs file-level cleanup. Close notes file, generate coverage |
ca29da43 NS |
1208 | variables and constructor. */ |
1209 | ||
1210 | void | |
159b3be1 | 1211 | coverage_finish (void) |
ca29da43 | 1212 | { |
b724567e NS |
1213 | if (bbg_file_name && gcov_close ()) |
1214 | unlink (bbg_file_name); | |
cb686b99 NS |
1215 | |
1216 | if (!flag_branch_probabilities && flag_test_coverage | |
1217 | && (!local_tick || local_tick == (unsigned)-1)) | |
1218 | /* Only remove the da file, if we're emitting coverage code and | |
1219 | cannot uniquely stamp it. If we can stamp it, libgcov will DTRT. */ | |
b724567e NS |
1220 | unlink (da_file_name); |
1221 | ||
1222 | if (coverage_obj_init ()) | |
ca29da43 | 1223 | { |
9771b263 | 1224 | vec<constructor_elt, va_gc> *fn_ctor = NULL; |
b724567e NS |
1225 | struct coverage_data *fn; |
1226 | ||
1227 | for (fn = functions_head; fn; fn = fn->next) | |
1228 | fn_ctor = coverage_obj_fn (fn_ctor, fn->fn_decl, fn); | |
1229 | coverage_obj_finish (fn_ctor); | |
ca29da43 | 1230 | } |
782f0db2 DM |
1231 | |
1232 | XDELETEVEC (da_file_name); | |
1233 | da_file_name = NULL; | |
ca29da43 NS |
1234 | } |
1235 | ||
ca29da43 | 1236 | #include "gt-coverage.h" |