]>
Commit | Line | Data |
---|---|---|
ca29da43 | 1 | /* Read and write coverage files, and associated functionality. |
85ec4feb | 2 | Copyright (C) 1990-2018 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" | |
c7131fb2 | 30 | #include "backend.h" |
957060b5 | 31 | #include "target.h" |
ca29da43 NS |
32 | #include "rtl.h" |
33 | #include "tree.h" | |
957060b5 | 34 | #include "tree-pass.h" |
4d0cdd0c | 35 | #include "memmodel.h" |
957060b5 | 36 | #include "tm_p.h" |
d8a2d370 | 37 | #include "stringpool.h" |
957060b5 AM |
38 | #include "cgraph.h" |
39 | #include "coverage.h" | |
40 | #include "diagnostic-core.h" | |
957060b5 | 41 | #include "fold-const.h" |
d8a2d370 | 42 | #include "stor-layout.h" |
ca29da43 | 43 | #include "output.h" |
ca29da43 | 44 | #include "toplev.h" |
ca29da43 | 45 | #include "langhooks.h" |
c9b9aa64 | 46 | #include "tree-iterator.h" |
103ff0d6 TJ |
47 | #include "context.h" |
48 | #include "pass_manager.h" | |
650cfcab | 49 | #include "intl.h" |
2243ba51 | 50 | #include "params.h" |
be3c16c4 | 51 | #include "auto-profile.h" |
ca29da43 NS |
52 | |
53 | #include "gcov-io.c" | |
54 | ||
b724567e | 55 | struct GTY((chain_next ("%h.next"))) coverage_data |
ca29da43 | 56 | { |
b724567e | 57 | struct coverage_data *next; /* next function */ |
159b3be1 | 58 | unsigned ident; /* function ident */ |
10adac51 XDL |
59 | unsigned lineno_checksum; /* function lineno checksum */ |
60 | unsigned cfg_checksum; /* function cfg checksum */ | |
5366b186 NS |
61 | tree fn_decl; /* the function decl */ |
62 | tree ctr_vars[GCOV_COUNTERS]; /* counter variables. */ | |
ca29da43 NS |
63 | }; |
64 | ||
65 | /* Counts information for a function. */ | |
526ceb68 | 66 | struct counts_entry : pointer_hash <counts_entry> |
ca29da43 NS |
67 | { |
68 | /* We hash by */ | |
796621e8 | 69 | unsigned ident; |
cdb23767 | 70 | unsigned ctr; |
159b3be1 | 71 | |
ca29da43 | 72 | /* Store */ |
10adac51 XDL |
73 | unsigned lineno_checksum; |
74 | unsigned cfg_checksum; | |
ca29da43 | 75 | gcov_type *counts; |
cdb23767 | 76 | struct gcov_ctr_summary summary; |
5deac340 RG |
77 | |
78 | /* hash_table support. */ | |
67f58944 TS |
79 | static inline hashval_t hash (const counts_entry *); |
80 | static int equal (const counts_entry *, const counts_entry *); | |
81 | static void remove (counts_entry *); | |
526ceb68 | 82 | }; |
ca29da43 | 83 | |
b724567e NS |
84 | static GTY(()) struct coverage_data *functions_head = 0; |
85 | static struct coverage_data **functions_tail = &functions_head; | |
6d70e6be | 86 | static unsigned no_coverage = 0; |
ca29da43 | 87 | |
cdb23767 NS |
88 | /* Cumulative counter information for whole program. */ |
89 | static unsigned prg_ctr_mask; /* Mask of counter types generated. */ | |
ca29da43 | 90 | |
cdb23767 | 91 | /* Counter information for current function. */ |
71c0e7fc | 92 | static unsigned fn_ctr_mask; /* Mask of counters used. */ |
5366b186 | 93 | static GTY(()) tree fn_v_ctrs[GCOV_COUNTERS]; /* counter variables. */ |
6d70e6be NS |
94 | static unsigned fn_n_ctrs[GCOV_COUNTERS]; /* Counters allocated. */ |
95 | static unsigned fn_b_ctrs[GCOV_COUNTERS]; /* Allocation base. */ | |
ca29da43 | 96 | |
b724567e NS |
97 | /* Coverage info VAR_DECL and function info type nodes. */ |
98 | static GTY(()) tree gcov_info_var; | |
99 | static GTY(()) tree gcov_fn_info_type; | |
100 | static GTY(()) tree gcov_fn_info_ptr_type; | |
101 | ||
efbb59b2 SB |
102 | /* Name of the notes (gcno) output file. The "bbg" prefix is for |
103 | historical reasons, when the notes file contained only the | |
104 | basic block graph notes. | |
105 | If this is NULL we're not writing to the notes file. */ | |
ca29da43 | 106 | static char *bbg_file_name; |
ca29da43 | 107 | |
efbb59b2 | 108 | /* File stamp for notes file. */ |
cb686b99 NS |
109 | static unsigned bbg_file_stamp; |
110 | ||
efbb59b2 | 111 | /* Name of the count data (gcda) file. */ |
ca29da43 NS |
112 | static char *da_file_name; |
113 | ||
09780dfb | 114 | /* The names of merge functions for counters. */ |
c77556a5 RX |
115 | #define STR(str) #str |
116 | #define DEF_GCOV_COUNTER(COUNTER, NAME, FN_TYPE) STR(__gcov_merge ## FN_TYPE), | |
117 | static const char *const ctr_merge_functions[GCOV_COUNTERS] = { | |
118 | #include "gcov-counter.def" | |
119 | }; | |
120 | #undef DEF_GCOV_COUNTER | |
121 | #undef STR | |
122 | ||
123 | #define DEF_GCOV_COUNTER(COUNTER, NAME, FN_TYPE) NAME, | |
124 | static const char *const ctr_names[GCOV_COUNTERS] = { | |
125 | #include "gcov-counter.def" | |
126 | }; | |
127 | #undef DEF_GCOV_COUNTER | |
09780dfb | 128 | |
ca29da43 | 129 | /* Forward declarations. */ |
159b3be1 | 130 | static void read_counts_file (void); |
5366b186 NS |
131 | static tree build_var (tree, tree, int); |
132 | static void build_fn_info_type (tree, unsigned, tree); | |
b724567e NS |
133 | static void build_info_type (tree, tree); |
134 | static tree build_fn_info (const struct coverage_data *, tree, tree); | |
135 | static tree build_info (tree, tree); | |
136 | static bool coverage_obj_init (void); | |
9771b263 DN |
137 | static vec<constructor_elt, va_gc> *coverage_obj_fn |
138 | (vec<constructor_elt, va_gc> *, tree, struct coverage_data const *); | |
139 | static void coverage_obj_finish (vec<constructor_elt, va_gc> *); | |
251e2ff2 RS |
140 | \f |
141 | /* Return the type node for gcov_type. */ | |
142 | ||
143 | tree | |
144 | get_gcov_type (void) | |
145 | { | |
f67f4dff RS |
146 | scalar_int_mode mode |
147 | = smallest_int_mode_for_size (LONG_LONG_TYPE_SIZE > 32 ? 64 : 32); | |
0f250839 | 148 | return lang_hooks.types.type_for_mode (mode, false); |
251e2ff2 RS |
149 | } |
150 | ||
151 | /* Return the type node for gcov_unsigned_t. */ | |
ca29da43 | 152 | |
251e2ff2 RS |
153 | static tree |
154 | get_gcov_unsigned_t (void) | |
155 | { | |
f67f4dff | 156 | scalar_int_mode mode = smallest_int_mode_for_size (32); |
0f250839 | 157 | return lang_hooks.types.type_for_mode (mode, true); |
251e2ff2 | 158 | } |
ca29da43 | 159 | \f |
0823efed | 160 | inline hashval_t |
67f58944 | 161 | counts_entry::hash (const counts_entry *entry) |
ca29da43 | 162 | { |
796621e8 | 163 | return entry->ident * GCOV_COUNTERS + entry->ctr; |
ca29da43 NS |
164 | } |
165 | ||
0823efed | 166 | inline int |
67f58944 | 167 | counts_entry::equal (const counts_entry *entry1, const counts_entry *entry2) |
ca29da43 | 168 | { |
796621e8 | 169 | return entry1->ident == entry2->ident && entry1->ctr == entry2->ctr; |
ca29da43 NS |
170 | } |
171 | ||
0823efed | 172 | inline void |
67f58944 | 173 | counts_entry::remove (counts_entry *entry) |
ca29da43 | 174 | { |
ca29da43 NS |
175 | free (entry->counts); |
176 | free (entry); | |
177 | } | |
178 | ||
0823efed | 179 | /* Hash table of count data. */ |
c203e8a7 | 180 | static hash_table<counts_entry> *counts_hash; |
0823efed | 181 | |
ca29da43 NS |
182 | /* Read in the counts file, if available. */ |
183 | ||
184 | static void | |
159b3be1 | 185 | read_counts_file (void) |
ca29da43 | 186 | { |
9b514d25 | 187 | gcov_unsigned_t fn_ident = 0; |
5366b186 NS |
188 | struct gcov_summary summary; |
189 | unsigned new_summary = 1; | |
7d63a2fa | 190 | gcov_unsigned_t tag; |
24a4a033 | 191 | int is_error = 0; |
10adac51 XDL |
192 | unsigned lineno_checksum = 0; |
193 | unsigned cfg_checksum = 0; | |
7d63a2fa | 194 | |
ca29da43 NS |
195 | if (!gcov_open (da_file_name, 1)) |
196 | return; | |
159b3be1 | 197 | |
160e2e4f | 198 | if (!gcov_magic (gcov_read_unsigned (), GCOV_DATA_MAGIC)) |
ca29da43 | 199 | { |
d4ee4d25 | 200 | warning (0, "%qs is not a gcov data file", da_file_name); |
ca29da43 NS |
201 | gcov_close (); |
202 | return; | |
203 | } | |
160e2e4f | 204 | else if ((tag = gcov_read_unsigned ()) != GCOV_VERSION) |
ca29da43 | 205 | { |
330d2e2a NS |
206 | char v[4], e[4]; |
207 | ||
208 | GCOV_UNSIGNED2STRING (v, tag); | |
209 | GCOV_UNSIGNED2STRING (e, GCOV_VERSION); | |
159b3be1 | 210 | |
d4ee4d25 | 211 | warning (0, "%qs is version %q.*s, expected version %q.*s", |
cb83302c | 212 | da_file_name, 4, v, 4, e); |
ca29da43 NS |
213 | gcov_close (); |
214 | return; | |
215 | } | |
159b3be1 | 216 | |
cb686b99 NS |
217 | /* Read the stamp, used for creating a generation count. */ |
218 | tag = gcov_read_unsigned (); | |
219 | bbg_file_stamp = crc32_unsigned (bbg_file_stamp, tag); | |
b8698a0f | 220 | |
c203e8a7 | 221 | counts_hash = new hash_table<counts_entry> (10); |
7d63a2fa | 222 | while ((tag = gcov_read_unsigned ())) |
ca29da43 | 223 | { |
7d63a2fa | 224 | gcov_unsigned_t length; |
9b514d25 | 225 | gcov_position_t offset; |
159b3be1 | 226 | |
ca29da43 NS |
227 | length = gcov_read_unsigned (); |
228 | offset = gcov_position (); | |
229 | if (tag == GCOV_TAG_FUNCTION) | |
230 | { | |
5366b186 | 231 | if (length) |
ca29da43 | 232 | { |
5366b186 NS |
233 | fn_ident = gcov_read_unsigned (); |
234 | lineno_checksum = gcov_read_unsigned (); | |
235 | cfg_checksum = gcov_read_unsigned (); | |
ca29da43 | 236 | } |
5366b186 NS |
237 | else |
238 | fn_ident = lineno_checksum = cfg_checksum = 0; | |
239 | new_summary = 1; | |
ca29da43 NS |
240 | } |
241 | else if (tag == GCOV_TAG_PROGRAM_SUMMARY) | |
242 | { | |
5366b186 NS |
243 | struct gcov_summary sum; |
244 | unsigned ix; | |
159b3be1 | 245 | |
5366b186 NS |
246 | if (new_summary) |
247 | memset (&summary, 0, sizeof (summary)); | |
159b3be1 | 248 | |
5366b186 NS |
249 | gcov_read_summary (&sum); |
250 | for (ix = 0; ix != GCOV_COUNTERS_SUMMABLE; ix++) | |
251 | { | |
252 | summary.ctrs[ix].runs += sum.ctrs[ix].runs; | |
253 | summary.ctrs[ix].sum_all += sum.ctrs[ix].sum_all; | |
254 | if (summary.ctrs[ix].run_max < sum.ctrs[ix].run_max) | |
255 | summary.ctrs[ix].run_max = sum.ctrs[ix].run_max; | |
256 | summary.ctrs[ix].sum_max += sum.ctrs[ix].sum_max; | |
ca29da43 | 257 | } |
9f71de84 TJ |
258 | if (new_summary) |
259 | memcpy (summary.ctrs[GCOV_COUNTER_ARCS].histogram, | |
260 | sum.ctrs[GCOV_COUNTER_ARCS].histogram, | |
261 | sizeof (gcov_bucket_type) * GCOV_HISTOGRAM_SIZE); | |
262 | else | |
263 | gcov_histogram_merge (summary.ctrs[GCOV_COUNTER_ARCS].histogram, | |
264 | sum.ctrs[GCOV_COUNTER_ARCS].histogram); | |
5366b186 | 265 | new_summary = 0; |
ca29da43 | 266 | } |
796621e8 | 267 | else if (GCOV_TAG_IS_COUNTER (tag) && fn_ident) |
ca29da43 | 268 | { |
526ceb68 | 269 | counts_entry **slot, *entry, elt; |
330d2e2a | 270 | unsigned n_counts = GCOV_TAG_COUNTER_NUM (length); |
ca29da43 NS |
271 | unsigned ix; |
272 | ||
796621e8 | 273 | elt.ident = fn_ident; |
cdb23767 | 274 | elt.ctr = GCOV_COUNTER_FOR_TAG (tag); |
ca29da43 | 275 | |
c203e8a7 | 276 | slot = counts_hash->find_slot (&elt, INSERT); |
ca29da43 NS |
277 | entry = *slot; |
278 | if (!entry) | |
279 | { | |
526ceb68 | 280 | *slot = entry = XCNEW (counts_entry); |
10adac51 | 281 | entry->ident = fn_ident; |
cdb23767 | 282 | entry->ctr = elt.ctr; |
10adac51 XDL |
283 | entry->lineno_checksum = lineno_checksum; |
284 | entry->cfg_checksum = cfg_checksum; | |
9f71de84 TJ |
285 | if (elt.ctr < GCOV_COUNTERS_SUMMABLE) |
286 | entry->summary = summary.ctrs[elt.ctr]; | |
287 | entry->summary.num = n_counts; | |
5ed6ace5 | 288 | entry->counts = XCNEWVEC (gcov_type, n_counts); |
ca29da43 | 289 | } |
10adac51 XDL |
290 | else if (entry->lineno_checksum != lineno_checksum |
291 | || entry->cfg_checksum != cfg_checksum) | |
ca29da43 | 292 | { |
10adac51 XDL |
293 | error ("Profile data for function %u is corrupted", fn_ident); |
294 | error ("checksum is (%x,%x) instead of (%x,%x)", | |
295 | entry->lineno_checksum, entry->cfg_checksum, | |
296 | lineno_checksum, cfg_checksum); | |
c203e8a7 TS |
297 | delete counts_hash; |
298 | counts_hash = NULL; | |
24a4a033 JH |
299 | break; |
300 | } | |
301 | else if (entry->summary.num != n_counts) | |
302 | { | |
10adac51 | 303 | error ("Profile data for function %u is corrupted", fn_ident); |
24a4a033 | 304 | error ("number of counters is %d instead of %d", entry->summary.num, n_counts); |
c203e8a7 TS |
305 | delete counts_hash; |
306 | counts_hash = NULL; | |
ca29da43 NS |
307 | break; |
308 | } | |
9b514d25 NS |
309 | else if (elt.ctr >= GCOV_COUNTERS_SUMMABLE) |
310 | { | |
24a4a033 JH |
311 | error ("cannot merge separate %s counters for function %u", |
312 | ctr_names[elt.ctr], fn_ident); | |
9b514d25 NS |
313 | goto skip_merge; |
314 | } | |
5366b186 | 315 | else |
ca29da43 | 316 | { |
5366b186 NS |
317 | entry->summary.runs += summary.ctrs[elt.ctr].runs; |
318 | entry->summary.sum_all += summary.ctrs[elt.ctr].sum_all; | |
319 | if (entry->summary.run_max < summary.ctrs[elt.ctr].run_max) | |
320 | entry->summary.run_max = summary.ctrs[elt.ctr].run_max; | |
321 | entry->summary.sum_max += summary.ctrs[elt.ctr].sum_max; | |
ca29da43 NS |
322 | } |
323 | for (ix = 0; ix != n_counts; ix++) | |
324 | entry->counts[ix] += gcov_read_counter (); | |
9b514d25 | 325 | skip_merge:; |
ca29da43 | 326 | } |
474f141e | 327 | gcov_sync (offset, length); |
24a4a033 | 328 | if ((is_error = gcov_is_error ())) |
00cf2913 | 329 | { |
324ff1a0 JJ |
330 | error (is_error < 0 |
331 | ? G_("%qs has overflowed") | |
332 | : G_("%qs is corrupted"), | |
00cf2913 | 333 | da_file_name); |
c203e8a7 TS |
334 | delete counts_hash; |
335 | counts_hash = NULL; | |
00cf2913 NS |
336 | break; |
337 | } | |
7d63a2fa | 338 | } |
159b3be1 | 339 | |
ca29da43 NS |
340 | gcov_close (); |
341 | } | |
342 | ||
343 | /* Returns the counters for a particular tag. */ | |
344 | ||
345 | gcov_type * | |
cdb23767 | 346 | get_coverage_counts (unsigned counter, unsigned expected, |
10adac51 | 347 | unsigned cfg_checksum, unsigned lineno_checksum, |
cdb23767 | 348 | const struct gcov_ctr_summary **summary) |
ca29da43 | 349 | { |
526ceb68 | 350 | counts_entry *entry, elt; |
ca29da43 | 351 | |
71c0e7fc | 352 | /* No hash table, no counts. */ |
c203e8a7 | 353 | if (!counts_hash) |
ca29da43 NS |
354 | { |
355 | static int warned = 0; | |
356 | ||
103ff0d6 TJ |
357 | if (!warned++ && dump_enabled_p ()) |
358 | dump_printf_loc (MSG_OPTIMIZED_LOCATIONS, input_location, | |
359 | (flag_guess_branch_prob | |
753b9bc3 | 360 | ? "file %s not found, execution counts estimated\n" |
103ff0d6 | 361 | : "file %s not found, execution counts assumed to " |
e645e942 | 362 | "be zero\n"), |
103ff0d6 | 363 | da_file_name); |
ca29da43 NS |
364 | return NULL; |
365 | } | |
2243ba51 XDL |
366 | if (PARAM_VALUE (PARAM_PROFILE_FUNC_INTERNAL_ID)) |
367 | elt.ident = current_function_funcdef_no + 1; | |
368 | else | |
369 | { | |
370 | gcc_assert (coverage_node_map_initialized_p ()); | |
371 | elt.ident = cgraph_node::get (cfun->decl)->profile_id; | |
372 | } | |
cdb23767 | 373 | elt.ctr = counter; |
c203e8a7 | 374 | entry = counts_hash->find (&elt); |
5366b186 NS |
375 | if (!entry || !entry->summary.num) |
376 | /* The function was not emitted, or is weak and not chosen in the | |
377 | final executable. Silently fail, because there's nothing we | |
378 | can do about it. */ | |
379 | return NULL; | |
380 | ||
10adac51 | 381 | if (entry->cfg_checksum != cfg_checksum |
16c1c158 | 382 | || entry->summary.num != expected) |
24a4a033 | 383 | { |
16c1c158 | 384 | static int warned = 0; |
650cfcab | 385 | bool warning_printed = false; |
4f1e4960 | 386 | tree id = DECL_ASSEMBLER_NAME (current_function_decl); |
16c1c158 | 387 | |
10adac51 XDL |
388 | warning_printed = |
389 | warning_at (input_location, OPT_Wcoverage_mismatch, | |
5366b186 | 390 | "the control flow of function %qE does not match " |
10adac51 | 391 | "its profile data (counter %qs)", id, ctr_names[counter]); |
103ff0d6 | 392 | if (warning_printed && dump_enabled_p ()) |
16c1c158 | 393 | { |
103ff0d6 TJ |
394 | dump_printf_loc (MSG_OPTIMIZED_LOCATIONS, input_location, |
395 | "use -Wno-error=coverage-mismatch to tolerate " | |
396 | "the mismatch but performance may drop if the " | |
e645e942 | 397 | "function is hot\n"); |
650cfcab | 398 | |
1da2ed5f | 399 | if (!seen_error () |
650cfcab NV |
400 | && !warned++) |
401 | { | |
103ff0d6 | 402 | dump_printf_loc (MSG_OPTIMIZED_LOCATIONS, input_location, |
e645e942 TJ |
403 | "coverage mismatch ignored\n"); |
404 | dump_printf (MSG_OPTIMIZED_LOCATIONS, | |
405 | flag_guess_branch_prob | |
406 | ? G_("execution counts estimated\n") | |
407 | : G_("execution counts assumed to be zero\n")); | |
650cfcab | 408 | if (!flag_guess_branch_prob) |
e645e942 TJ |
409 | dump_printf (MSG_OPTIMIZED_LOCATIONS, |
410 | "this can result in poorly optimized code\n"); | |
650cfcab | 411 | } |
16c1c158 RG |
412 | } |
413 | ||
414 | return NULL; | |
ca29da43 | 415 | } |
5366b186 NS |
416 | else if (entry->lineno_checksum != lineno_checksum) |
417 | { | |
2243ba51 XDL |
418 | warning (OPT_Wcoverage_mismatch, |
419 | "source locations for function %qE have changed," | |
5366b186 NS |
420 | " the profile data may be out of date", |
421 | DECL_ASSEMBLER_NAME (current_function_decl)); | |
422 | } | |
159b3be1 | 423 | |
cdb23767 NS |
424 | if (summary) |
425 | *summary = &entry->summary; | |
ca29da43 NS |
426 | |
427 | return entry->counts; | |
428 | } | |
cdb23767 | 429 | |
6356f892 | 430 | /* Allocate NUM counters of type COUNTER. Returns nonzero if the |
6d70e6be | 431 | allocation succeeded. */ |
cdb23767 | 432 | |
6d70e6be NS |
433 | int |
434 | coverage_counter_alloc (unsigned counter, unsigned num) | |
cdb23767 | 435 | { |
6d70e6be NS |
436 | if (no_coverage) |
437 | return 0; | |
159b3be1 | 438 | |
6d70e6be NS |
439 | if (!num) |
440 | return 1; | |
159b3be1 | 441 | |
5366b186 | 442 | if (!fn_v_ctrs[counter]) |
cdb23767 | 443 | { |
5366b186 NS |
444 | tree array_type = build_array_type (get_gcov_type (), NULL_TREE); |
445 | ||
446 | fn_v_ctrs[counter] | |
447 | = build_var (current_function_decl, array_type, counter); | |
cdb23767 | 448 | } |
5366b186 | 449 | |
6d70e6be NS |
450 | fn_b_ctrs[counter] = fn_n_ctrs[counter]; |
451 | fn_n_ctrs[counter] += num; | |
5366b186 | 452 | |
6d70e6be NS |
453 | fn_ctr_mask |= 1 << counter; |
454 | return 1; | |
455 | } | |
cdb23767 | 456 | |
6de9cd9a DN |
457 | /* Generate a tree to access COUNTER NO. */ |
458 | ||
459 | tree | |
460 | tree_coverage_counter_ref (unsigned counter, unsigned no) | |
461 | { | |
070e3969 | 462 | tree gcov_type_node = get_gcov_type (); |
6de9cd9a | 463 | |
341c100f | 464 | gcc_assert (no < fn_n_ctrs[counter] - fn_b_ctrs[counter]); |
6de9cd9a | 465 | |
5366b186 NS |
466 | no += fn_b_ctrs[counter]; |
467 | ||
6de9cd9a | 468 | /* "no" here is an array index, scaled to bytes later. */ |
5366b186 | 469 | return build4 (ARRAY_REF, gcov_type_node, fn_v_ctrs[counter], |
f81b1a3d | 470 | build_int_cst (integer_type_node, no), NULL, NULL); |
6de9cd9a | 471 | } |
fc9161c1 RG |
472 | |
473 | /* Generate a tree to access the address of COUNTER NO. */ | |
474 | ||
475 | tree | |
476 | tree_coverage_counter_addr (unsigned counter, unsigned no) | |
477 | { | |
478 | tree gcov_type_node = get_gcov_type (); | |
479 | ||
480 | gcc_assert (no < fn_n_ctrs[counter] - fn_b_ctrs[counter]); | |
5366b186 | 481 | no += fn_b_ctrs[counter]; |
628c189e | 482 | |
fc9161c1 RG |
483 | /* "no" here is an array index, scaled to bytes later. */ |
484 | return build_fold_addr_expr (build4 (ARRAY_REF, gcov_type_node, | |
5366b186 | 485 | fn_v_ctrs[counter], |
f81b1a3d | 486 | build_int_cst (integer_type_node, no), |
fc9161c1 RG |
487 | NULL, NULL)); |
488 | } | |
ca29da43 | 489 | \f |
10adac51 | 490 | |
ca29da43 | 491 | /* Generate a checksum for a string. CHKSUM is the current |
71c0e7fc | 492 | checksum. */ |
ca29da43 NS |
493 | |
494 | static unsigned | |
20c361f3 | 495 | coverage_checksum_string (unsigned chksum, const char *string) |
ca29da43 | 496 | { |
20c361f3 JH |
497 | int i; |
498 | char *dup = NULL; | |
499 | ||
500 | /* Look for everything that looks if it were produced by | |
5880f14f | 501 | get_file_function_name and zero out the second part |
20c361f3 JH |
502 | that may result from flag_random_seed. This is not critical |
503 | as the checksums are used only for sanity checking. */ | |
504 | for (i = 0; string[i]; i++) | |
ca29da43 | 505 | { |
2b557972 JH |
506 | int offset = 0; |
507 | if (!strncmp (string + i, "_GLOBAL__N_", 11)) | |
508 | offset = 11; | |
20c361f3 | 509 | if (!strncmp (string + i, "_GLOBAL__", 9)) |
2b557972 JH |
510 | offset = 9; |
511 | ||
512 | /* C++ namespaces do have scheme: | |
513 | _GLOBAL__N_<filename>_<wrongmagicnumber>_<magicnumber>functionname | |
514 | since filename might contain extra underscores there seems | |
515 | to be no better chance then walk all possible offsets looking | |
fa10beec | 516 | for magicnumber. */ |
2b557972 | 517 | if (offset) |
1f651229 JH |
518 | { |
519 | for (i = i + offset; string[i]; i++) | |
520 | if (string[i]=='_') | |
521 | { | |
522 | int y; | |
523 | ||
524 | for (y = 1; y < 9; y++) | |
525 | if (!(string[i + y] >= '0' && string[i + y] <= '9') | |
526 | && !(string[i + y] >= 'A' && string[i + y] <= 'F')) | |
527 | break; | |
528 | if (y != 9 || string[i + 9] != '_') | |
529 | continue; | |
530 | for (y = 10; y < 18; y++) | |
531 | if (!(string[i + y] >= '0' && string[i + y] <= '9') | |
532 | && !(string[i + y] >= 'A' && string[i + y] <= 'F')) | |
533 | break; | |
534 | if (y != 18) | |
535 | continue; | |
536 | if (!dup) | |
537 | string = dup = xstrdup (string); | |
538 | for (y = 10; y < 18; y++) | |
539 | dup[i + y] = '0'; | |
540 | } | |
541 | break; | |
542 | } | |
ca29da43 | 543 | } |
20c361f3 JH |
544 | |
545 | chksum = crc32_string (chksum, string); | |
04695783 | 546 | free (dup); |
159b3be1 | 547 | |
ca29da43 NS |
548 | return chksum; |
549 | } | |
550 | ||
551 | /* Compute checksum for the current function. We generate a CRC32. */ | |
552 | ||
10adac51 XDL |
553 | unsigned |
554 | coverage_compute_lineno_checksum (void) | |
ca29da43 | 555 | { |
a281759f PB |
556 | expanded_location xloc |
557 | = expand_location (DECL_SOURCE_LOCATION (current_function_decl)); | |
558 | unsigned chksum = xloc.line; | |
ca29da43 | 559 | |
bc91c436 ML |
560 | if (xloc.file) |
561 | chksum = coverage_checksum_string (chksum, xloc.file); | |
20c361f3 | 562 | chksum = coverage_checksum_string |
ca29da43 NS |
563 | (chksum, IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (current_function_decl))); |
564 | ||
565 | return chksum; | |
566 | } | |
10adac51 | 567 | |
2fa3d31b JH |
568 | /* Compute profile ID. This is better to be unique in whole program. */ |
569 | ||
570 | unsigned | |
571 | coverage_compute_profile_id (struct cgraph_node *n) | |
572 | { | |
cb90235d | 573 | unsigned chksum; |
2fa3d31b | 574 | |
cb90235d | 575 | /* Externally visible symbols have unique name. */ |
7e044261 | 576 | if (TREE_PUBLIC (n->decl) || DECL_EXTERNAL (n->decl) || n->unique_name) |
cb90235d JH |
577 | { |
578 | chksum = coverage_checksum_string | |
579 | (0, IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (n->decl))); | |
580 | } | |
581 | else | |
582 | { | |
583 | expanded_location xloc | |
584 | = expand_location (DECL_SOURCE_LOCATION (n->decl)); | |
2243ba51 | 585 | bool use_name_only = (PARAM_VALUE (PARAM_PROFILE_FUNC_INTERNAL_ID) == 0); |
cb90235d | 586 | |
2243ba51 | 587 | chksum = (use_name_only ? 0 : xloc.line); |
bc91c436 ML |
588 | if (xloc.file) |
589 | chksum = coverage_checksum_string (chksum, xloc.file); | |
cb90235d JH |
590 | chksum = coverage_checksum_string |
591 | (chksum, IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (n->decl))); | |
2243ba51 | 592 | if (!use_name_only && first_global_object_name) |
cb90235d JH |
593 | chksum = coverage_checksum_string |
594 | (chksum, first_global_object_name); | |
595 | chksum = coverage_checksum_string | |
596 | (chksum, aux_base_name); | |
597 | } | |
2fa3d31b | 598 | |
7e044261 JH |
599 | /* Non-negative integers are hopefully small enough to fit in all targets. |
600 | Gcov file formats wants non-zero function IDs. */ | |
601 | chksum = chksum & 0x7fffffff; | |
602 | return chksum + (!chksum); | |
2fa3d31b JH |
603 | } |
604 | ||
a96bf0d3 | 605 | /* Compute cfg checksum for the function FN given as argument. |
10adac51 XDL |
606 | The checksum is calculated carefully so that |
607 | source code changes that doesn't affect the control flow graph | |
608 | won't change the checksum. | |
609 | This is to make the profile data useable across source code change. | |
610 | The downside of this is that the compiler may use potentially | |
611 | wrong profile data - that the source code change has non-trivial impact | |
612 | on the validity of profile data (e.g. the reversed condition) | |
613 | but the compiler won't detect the change and use the wrong profile data. */ | |
614 | ||
615 | unsigned | |
a96bf0d3 | 616 | coverage_compute_cfg_checksum (struct function *fn) |
10adac51 XDL |
617 | { |
618 | basic_block bb; | |
a96bf0d3 | 619 | unsigned chksum = n_basic_blocks_for_fn (fn); |
10adac51 | 620 | |
a96bf0d3 | 621 | FOR_EACH_BB_FN (bb, fn) |
10adac51 XDL |
622 | { |
623 | edge e; | |
624 | edge_iterator ei; | |
625 | chksum = crc32_byte (chksum, bb->index); | |
626 | FOR_EACH_EDGE (e, ei, bb->succs) | |
627 | { | |
628 | chksum = crc32_byte (chksum, e->dest->index); | |
629 | } | |
630 | } | |
631 | ||
632 | return chksum; | |
633 | } | |
ca29da43 | 634 | \f |
efbb59b2 | 635 | /* Begin output to the notes file for the current function. |
b724567e | 636 | Writes the function header. Returns nonzero if data should be output. */ |
ca29da43 NS |
637 | |
638 | int | |
b724567e | 639 | coverage_begin_function (unsigned lineno_checksum, unsigned cfg_checksum) |
ca29da43 | 640 | { |
b724567e NS |
641 | expanded_location xloc; |
642 | unsigned long offset; | |
643 | ||
2f908293 SP |
644 | /* We don't need to output .gcno file unless we're under -ftest-coverage |
645 | (e.g. -fprofile-arcs/generate/use don't need .gcno to work). */ | |
b724567e | 646 | if (no_coverage || !bbg_file_name) |
6d70e6be | 647 | return 0; |
159b3be1 | 648 | |
b724567e | 649 | xloc = expand_location (DECL_SOURCE_LOCATION (current_function_decl)); |
10adac51 | 650 | |
b724567e NS |
651 | /* Announce function */ |
652 | offset = gcov_write_tag (GCOV_TAG_FUNCTION); | |
2243ba51 XDL |
653 | if (PARAM_VALUE (PARAM_PROFILE_FUNC_INTERNAL_ID)) |
654 | gcov_write_unsigned (current_function_funcdef_no + 1); | |
655 | else | |
656 | { | |
657 | gcc_assert (coverage_node_map_initialized_p ()); | |
658 | gcov_write_unsigned ( | |
659 | cgraph_node::get (current_function_decl)->profile_id); | |
660 | } | |
661 | ||
b724567e NS |
662 | gcov_write_unsigned (lineno_checksum); |
663 | gcov_write_unsigned (cfg_checksum); | |
664 | gcov_write_string (IDENTIFIER_POINTER | |
665 | (DECL_ASSEMBLER_NAME (current_function_decl))); | |
136ca74e | 666 | gcov_write_unsigned (DECL_ARTIFICIAL (current_function_decl)); |
676519f7 | 667 | gcov_write_filename (xloc.file); |
b724567e | 668 | gcov_write_unsigned (xloc.line); |
136ca74e ML |
669 | gcov_write_unsigned (xloc.column); |
670 | ||
671 | expanded_location endloc = expand_location (cfun->function_end_locus); | |
672 | ||
673 | /* Function can start in a single file and end in another one. */ | |
674 | gcov_write_unsigned (endloc.file == xloc.file ? endloc.line : xloc.line); | |
b724567e | 675 | gcov_write_length (offset); |
ca29da43 | 676 | |
ca29da43 NS |
677 | return !gcov_is_error (); |
678 | } | |
679 | ||
680 | /* Finish coverage data for the current function. Verify no output | |
681 | error has occurred. Save function coverage counts. */ | |
682 | ||
683 | void | |
10adac51 | 684 | coverage_end_function (unsigned lineno_checksum, unsigned cfg_checksum) |
ca29da43 NS |
685 | { |
686 | unsigned i; | |
159b3be1 | 687 | |
b724567e | 688 | if (bbg_file_name && gcov_is_error ()) |
159b3be1 | 689 | { |
d4ee4d25 | 690 | warning (0, "error writing %qs", bbg_file_name); |
b724567e NS |
691 | unlink (bbg_file_name); |
692 | bbg_file_name = NULL; | |
ca29da43 | 693 | } |
cdb23767 | 694 | |
2ac69a0c | 695 | if (fn_ctr_mask) |
cdb23767 | 696 | { |
2ac69a0c NS |
697 | struct coverage_data *item = 0; |
698 | ||
7e044261 | 699 | item = ggc_alloc<coverage_data> (); |
2243ba51 | 700 | |
7e044261 JH |
701 | if (PARAM_VALUE (PARAM_PROFILE_FUNC_INTERNAL_ID)) |
702 | item->ident = current_function_funcdef_no + 1; | |
703 | else | |
704 | { | |
705 | gcc_assert (coverage_node_map_initialized_p ()); | |
706 | item->ident = cgraph_node::get (cfun->decl)->profile_id; | |
2ac69a0c | 707 | } |
10adac51 | 708 | |
7e044261 JH |
709 | item->lineno_checksum = lineno_checksum; |
710 | item->cfg_checksum = cfg_checksum; | |
711 | ||
712 | item->fn_decl = current_function_decl; | |
713 | item->next = 0; | |
714 | *functions_tail = item; | |
715 | functions_tail = &item->next; | |
716 | ||
cdb23767 NS |
717 | for (i = 0; i != GCOV_COUNTERS; i++) |
718 | { | |
5366b186 | 719 | tree var = fn_v_ctrs[i]; |
2ac69a0c NS |
720 | |
721 | if (item) | |
722 | item->ctr_vars[i] = var; | |
5366b186 NS |
723 | if (var) |
724 | { | |
725 | tree array_type = build_index_type (size_int (fn_n_ctrs[i] - 1)); | |
726 | array_type = build_array_type (get_gcov_type (), array_type); | |
727 | TREE_TYPE (var) = array_type; | |
728 | DECL_SIZE (var) = TYPE_SIZE (array_type); | |
729 | DECL_SIZE_UNIT (var) = TYPE_SIZE_UNIT (array_type); | |
9041d2e6 | 730 | varpool_node::finalize_decl (var); |
5366b186 | 731 | } |
2ac69a0c | 732 | |
5366b186 NS |
733 | fn_b_ctrs[i] = fn_n_ctrs[i] = 0; |
734 | fn_v_ctrs[i] = NULL_TREE; | |
cdb23767 NS |
735 | } |
736 | prg_ctr_mask |= fn_ctr_mask; | |
737 | fn_ctr_mask = 0; | |
738 | } | |
ca29da43 NS |
739 | } |
740 | ||
4ebcdc23 ML |
741 | /* Remove coverage file if opened. */ |
742 | ||
743 | void | |
744 | coverage_remove_note_file (void) | |
745 | { | |
746 | if (bbg_file_name) | |
747 | { | |
748 | gcov_close (); | |
749 | unlink (bbg_file_name); | |
750 | } | |
751 | } | |
752 | ||
5366b186 | 753 | /* Build a coverage variable of TYPE for function FN_DECL. If COUNTER |
0e485da0 | 754 | >= 0 it is a counter array, otherwise it is the function structure. */ |
ca29da43 | 755 | |
ca29da43 | 756 | static tree |
5366b186 NS |
757 | build_var (tree fn_decl, tree type, int counter) |
758 | { | |
759 | tree var = build_decl (BUILTINS_LOCATION, VAR_DECL, NULL_TREE, type); | |
9e66e106 JJ |
760 | const char *fn_name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (fn_decl)); |
761 | char *buf; | |
762 | size_t fn_name_len, len; | |
763 | ||
764 | fn_name = targetm.strip_name_encoding (fn_name); | |
765 | fn_name_len = strlen (fn_name); | |
766 | buf = XALLOCAVEC (char, fn_name_len + 8 + sizeof (int) * 3); | |
5366b186 | 767 | |
5366b186 | 768 | if (counter < 0) |
9e66e106 | 769 | strcpy (buf, "__gcov__"); |
5366b186 | 770 | else |
9e66e106 JJ |
771 | sprintf (buf, "__gcov%u_", counter); |
772 | len = strlen (buf); | |
f8a1abf8 | 773 | buf[len - 1] = symbol_table::symbol_suffix_separator (); |
9e66e106 | 774 | memcpy (buf + len, fn_name, fn_name_len + 1); |
5366b186 | 775 | DECL_NAME (var) = get_identifier (buf); |
89b0c303 NS |
776 | TREE_STATIC (var) = 1; |
777 | TREE_ADDRESSABLE (var) = 1; | |
400a4f6c | 778 | DECL_NONALIASED (var) = 1; |
fe37c7af | 779 | SET_DECL_ALIGN (var, TYPE_ALIGN (type)); |
5366b186 NS |
780 | |
781 | return var; | |
782 | } | |
783 | ||
784 | /* Creates the gcov_fn_info RECORD_TYPE. */ | |
785 | ||
786 | static void | |
787 | build_fn_info_type (tree type, unsigned counters, tree gcov_info_type) | |
ca29da43 | 788 | { |
5366b186 | 789 | tree ctr_info = lang_hooks.types.make_type (RECORD_TYPE); |
ca29da43 | 790 | tree field, fields; |
cdb23767 | 791 | tree array_type; |
159b3be1 | 792 | |
5366b186 NS |
793 | gcc_assert (counters); |
794 | ||
795 | /* ctr_info::num */ | |
796 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
797 | get_gcov_unsigned_t ()); | |
798 | fields = field; | |
799 | ||
800 | /* ctr_info::values */ | |
801 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
802 | build_pointer_type (get_gcov_type ())); | |
803 | DECL_CHAIN (field) = fields; | |
804 | fields = field; | |
805 | ||
806 | finish_builtin_struct (ctr_info, "__gcov_ctr_info", fields, NULL_TREE); | |
807 | ||
808 | /* key */ | |
809 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
810 | build_pointer_type (build_qualified_type | |
811 | (gcov_info_type, TYPE_QUAL_CONST))); | |
812 | fields = field; | |
813 | ||
796621e8 | 814 | /* ident */ |
5366b186 NS |
815 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, |
816 | get_gcov_unsigned_t ()); | |
817 | DECL_CHAIN (field) = fields; | |
818 | fields = field; | |
819 | ||
10adac51 | 820 | /* lineno_checksum */ |
5366b186 NS |
821 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, |
822 | get_gcov_unsigned_t ()); | |
910ad8de | 823 | DECL_CHAIN (field) = fields; |
ca29da43 NS |
824 | fields = field; |
825 | ||
10adac51 | 826 | /* cfg checksum */ |
5366b186 NS |
827 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, |
828 | get_gcov_unsigned_t ()); | |
10adac51 XDL |
829 | DECL_CHAIN (field) = fields; |
830 | fields = field; | |
831 | ||
f81b1a3d | 832 | array_type = build_index_type (size_int (counters - 1)); |
5366b186 | 833 | array_type = build_array_type (ctr_info, array_type); |
159b3be1 | 834 | |
ca29da43 | 835 | /* counters */ |
5366b186 | 836 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, array_type); |
910ad8de | 837 | DECL_CHAIN (field) = fields; |
ca29da43 NS |
838 | fields = field; |
839 | ||
cdb23767 | 840 | finish_builtin_struct (type, "__gcov_fn_info", fields, NULL_TREE); |
ca29da43 NS |
841 | } |
842 | ||
b724567e NS |
843 | /* Returns a CONSTRUCTOR for a gcov_fn_info. DATA is |
844 | the coverage data for the function and TYPE is the gcov_fn_info | |
845 | RECORD_TYPE. KEY is the object file key. */ | |
cdb23767 | 846 | |
ca29da43 | 847 | static tree |
b724567e | 848 | build_fn_info (const struct coverage_data *data, tree type, tree key) |
ca29da43 | 849 | { |
cdb23767 | 850 | tree fields = TYPE_FIELDS (type); |
5366b186 | 851 | tree ctr_type; |
cdb23767 | 852 | unsigned ix; |
9771b263 DN |
853 | vec<constructor_elt, va_gc> *v1 = NULL; |
854 | vec<constructor_elt, va_gc> *v2 = NULL; | |
159b3be1 | 855 | |
5366b186 NS |
856 | /* key */ |
857 | CONSTRUCTOR_APPEND_ELT (v1, fields, | |
858 | build1 (ADDR_EXPR, TREE_TYPE (fields), key)); | |
859 | fields = DECL_CHAIN (fields); | |
860 | ||
796621e8 | 861 | /* ident */ |
f9b36bb3 KH |
862 | CONSTRUCTOR_APPEND_ELT (v1, fields, |
863 | build_int_cstu (get_gcov_unsigned_t (), | |
b724567e | 864 | data->ident)); |
910ad8de | 865 | fields = DECL_CHAIN (fields); |
159b3be1 | 866 | |
10adac51 XDL |
867 | /* lineno_checksum */ |
868 | CONSTRUCTOR_APPEND_ELT (v1, fields, | |
869 | build_int_cstu (get_gcov_unsigned_t (), | |
b724567e | 870 | data->lineno_checksum)); |
10adac51 XDL |
871 | fields = DECL_CHAIN (fields); |
872 | ||
873 | /* cfg_checksum */ | |
f9b36bb3 KH |
874 | CONSTRUCTOR_APPEND_ELT (v1, fields, |
875 | build_int_cstu (get_gcov_unsigned_t (), | |
b724567e | 876 | data->cfg_checksum)); |
910ad8de | 877 | fields = DECL_CHAIN (fields); |
159b3be1 | 878 | |
ca29da43 | 879 | /* counters */ |
5366b186 | 880 | ctr_type = TREE_TYPE (TREE_TYPE (fields)); |
cdb23767 NS |
881 | for (ix = 0; ix != GCOV_COUNTERS; ix++) |
882 | if (prg_ctr_mask & (1 << ix)) | |
5366b186 | 883 | { |
9771b263 | 884 | vec<constructor_elt, va_gc> *ctr = NULL; |
b724567e | 885 | tree var = data->ctr_vars[ix]; |
5366b186 NS |
886 | unsigned count = 0; |
887 | ||
888 | if (var) | |
889 | count | |
9439e9a1 | 890 | = tree_to_shwi (TYPE_MAX_VALUE (TYPE_DOMAIN (TREE_TYPE (var)))) |
5366b186 NS |
891 | + 1; |
892 | ||
893 | CONSTRUCTOR_APPEND_ELT (ctr, TYPE_FIELDS (ctr_type), | |
894 | build_int_cstu (get_gcov_unsigned_t (), | |
895 | count)); | |
896 | ||
897 | if (var) | |
898 | CONSTRUCTOR_APPEND_ELT (ctr, DECL_CHAIN (TYPE_FIELDS (ctr_type)), | |
899 | build_fold_addr_expr (var)); | |
900 | ||
901 | CONSTRUCTOR_APPEND_ELT (v2, NULL, build_constructor (ctr_type, ctr)); | |
902 | } | |
903 | ||
f9b36bb3 KH |
904 | CONSTRUCTOR_APPEND_ELT (v1, fields, |
905 | build_constructor (TREE_TYPE (fields), v2)); | |
159b3be1 | 906 | |
f9b36bb3 | 907 | return build_constructor (type, v1); |
ca29da43 NS |
908 | } |
909 | ||
b724567e NS |
910 | /* Create gcov_info struct. TYPE is the incomplete RECORD_TYPE to be |
911 | completed, and FN_INFO_PTR_TYPE is a pointer to the function info type. */ | |
cdb23767 | 912 | |
5366b186 | 913 | static void |
b724567e | 914 | build_info_type (tree type, tree fn_info_ptr_type) |
ca29da43 | 915 | { |
cdb23767 | 916 | tree field, fields = NULL_TREE; |
b724567e | 917 | tree merge_fn_type; |
9b514d25 | 918 | |
5366b186 NS |
919 | /* Version ident */ |
920 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
921 | get_gcov_unsigned_t ()); | |
910ad8de | 922 | DECL_CHAIN (field) = fields; |
ca29da43 NS |
923 | fields = field; |
924 | ||
5366b186 NS |
925 | /* next pointer */ |
926 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
927 | build_pointer_type (build_qualified_type | |
928 | (type, TYPE_QUAL_CONST))); | |
910ad8de | 929 | DECL_CHAIN (field) = fields; |
ca29da43 NS |
930 | fields = field; |
931 | ||
5366b186 NS |
932 | /* stamp */ |
933 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
934 | get_gcov_unsigned_t ()); | |
910ad8de | 935 | DECL_CHAIN (field) = fields; |
09780dfb ZD |
936 | fields = field; |
937 | ||
5366b186 NS |
938 | /* Filename */ |
939 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
940 | build_pointer_type (build_qualified_type | |
941 | (char_type_node, TYPE_QUAL_CONST))); | |
942 | DECL_CHAIN (field) = fields; | |
943 | fields = field; | |
ca29da43 | 944 | |
5366b186 NS |
945 | /* merge fn array */ |
946 | merge_fn_type | |
947 | = build_function_type_list (void_type_node, | |
948 | build_pointer_type (get_gcov_type ()), | |
949 | get_gcov_unsigned_t (), NULL_TREE); | |
950 | merge_fn_type | |
951 | = build_array_type (build_pointer_type (merge_fn_type), | |
952 | build_index_type (size_int (GCOV_COUNTERS - 1))); | |
953 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
954 | merge_fn_type); | |
955 | DECL_CHAIN (field) = fields; | |
956 | fields = field; | |
957 | ||
958 | /* n_functions */ | |
959 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
960 | get_gcov_unsigned_t ()); | |
961 | DECL_CHAIN (field) = fields; | |
962 | fields = field; | |
963 | ||
b724567e NS |
964 | /* function_info pointer pointer */ |
965 | fn_info_ptr_type = build_pointer_type | |
966 | (build_qualified_type (fn_info_ptr_type, TYPE_QUAL_CONST)); | |
5366b186 | 967 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, |
b724567e | 968 | fn_info_ptr_type); |
5366b186 NS |
969 | DECL_CHAIN (field) = fields; |
970 | fields = field; | |
09780dfb | 971 | |
5366b186 | 972 | finish_builtin_struct (type, "__gcov_info", fields, NULL_TREE); |
ca29da43 NS |
973 | } |
974 | ||
b724567e NS |
975 | /* Returns a CONSTRUCTOR for the gcov_info object. INFO_TYPE is the |
976 | gcov_info structure type, FN_ARY is the array of pointers to | |
977 | function info objects. */ | |
cdb23767 | 978 | |
ca29da43 | 979 | static tree |
b724567e | 980 | build_info (tree info_type, tree fn_ary) |
ca29da43 | 981 | { |
5366b186 | 982 | tree info_fields = TYPE_FIELDS (info_type); |
b724567e | 983 | tree merge_fn_type, n_funcs; |
5366b186 | 984 | unsigned ix; |
cdb23767 | 985 | tree filename_string; |
2f908293 | 986 | int da_file_name_len; |
9771b263 DN |
987 | vec<constructor_elt, va_gc> *v1 = NULL; |
988 | vec<constructor_elt, va_gc> *v2 = NULL; | |
159b3be1 | 989 | |
cdb23767 | 990 | /* Version ident */ |
5366b186 NS |
991 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, |
992 | build_int_cstu (TREE_TYPE (info_fields), | |
993 | GCOV_VERSION)); | |
994 | info_fields = DECL_CHAIN (info_fields); | |
159b3be1 | 995 | |
ca29da43 | 996 | /* next -- NULL */ |
5366b186 NS |
997 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, null_pointer_node); |
998 | info_fields = DECL_CHAIN (info_fields); | |
999 | ||
dd486eb2 | 1000 | /* stamp */ |
5366b186 NS |
1001 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, |
1002 | build_int_cstu (TREE_TYPE (info_fields), | |
cb686b99 | 1003 | bbg_file_stamp)); |
5366b186 | 1004 | info_fields = DECL_CHAIN (info_fields); |
dd486eb2 | 1005 | |
ca29da43 | 1006 | /* Filename */ |
2f908293 SP |
1007 | da_file_name_len = strlen (da_file_name); |
1008 | filename_string = build_string (da_file_name_len + 1, da_file_name); | |
4a90aeeb | 1009 | TREE_TYPE (filename_string) = build_array_type |
f81b1a3d | 1010 | (char_type_node, build_index_type (size_int (da_file_name_len))); |
5366b186 NS |
1011 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, |
1012 | build1 (ADDR_EXPR, TREE_TYPE (info_fields), | |
1013 | filename_string)); | |
1014 | info_fields = DECL_CHAIN (info_fields); | |
159b3be1 | 1015 | |
5366b186 NS |
1016 | /* merge fn array -- NULL slots indicate unmeasured counters */ |
1017 | merge_fn_type = TREE_TYPE (TREE_TYPE (info_fields)); | |
1018 | for (ix = 0; ix != GCOV_COUNTERS; ix++) | |
ca29da43 | 1019 | { |
5366b186 | 1020 | tree ptr = null_pointer_node; |
159b3be1 | 1021 | |
5366b186 NS |
1022 | if ((1u << ix) & prg_ctr_mask) |
1023 | { | |
1024 | tree merge_fn = build_decl (BUILTINS_LOCATION, | |
1025 | FUNCTION_DECL, | |
1026 | get_identifier (ctr_merge_functions[ix]), | |
1027 | TREE_TYPE (merge_fn_type)); | |
1028 | DECL_EXTERNAL (merge_fn) = 1; | |
1029 | TREE_PUBLIC (merge_fn) = 1; | |
1030 | DECL_ARTIFICIAL (merge_fn) = 1; | |
1031 | TREE_NOTHROW (merge_fn) = 1; | |
1032 | /* Initialize assembler name so we can stream out. */ | |
1033 | DECL_ASSEMBLER_NAME (merge_fn); | |
1034 | ptr = build1 (ADDR_EXPR, merge_fn_type, merge_fn); | |
1035 | } | |
1036 | CONSTRUCTOR_APPEND_ELT (v2, NULL, ptr); | |
ca29da43 | 1037 | } |
5366b186 NS |
1038 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, |
1039 | build_constructor (TREE_TYPE (info_fields), v2)); | |
1040 | info_fields = DECL_CHAIN (info_fields); | |
1041 | ||
1042 | /* n_functions */ | |
b724567e NS |
1043 | n_funcs = TYPE_MAX_VALUE (TYPE_DOMAIN (TREE_TYPE (fn_ary))); |
1044 | n_funcs = fold_build2 (PLUS_EXPR, TREE_TYPE (info_fields), | |
1045 | n_funcs, size_one_node); | |
1046 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, n_funcs); | |
5366b186 | 1047 | info_fields = DECL_CHAIN (info_fields); |
5366b186 | 1048 | |
b724567e | 1049 | /* functions */ |
5366b186 | 1050 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, |
b724567e NS |
1051 | build1 (ADDR_EXPR, TREE_TYPE (info_fields), fn_ary)); |
1052 | info_fields = DECL_CHAIN (info_fields); | |
1053 | ||
1054 | gcc_assert (!info_fields); | |
5366b186 | 1055 | return build_constructor (info_type, v1); |
ca29da43 NS |
1056 | } |
1057 | ||
d6d7eee1 GW |
1058 | /* Generate the constructor function to call __gcov_init. */ |
1059 | ||
1060 | static void | |
1061 | build_init_ctor (tree gcov_info_type) | |
1062 | { | |
1063 | tree ctor, stmt, init_fn; | |
1064 | ||
1065 | /* Build a decl for __gcov_init. */ | |
1066 | init_fn = build_pointer_type (gcov_info_type); | |
1067 | init_fn = build_function_type_list (void_type_node, init_fn, NULL); | |
1068 | init_fn = build_decl (BUILTINS_LOCATION, FUNCTION_DECL, | |
1069 | get_identifier ("__gcov_init"), init_fn); | |
1070 | TREE_PUBLIC (init_fn) = 1; | |
1071 | DECL_EXTERNAL (init_fn) = 1; | |
1072 | DECL_ASSEMBLER_NAME (init_fn); | |
1073 | ||
1074 | /* Generate a call to __gcov_init(&gcov_info). */ | |
1075 | ctor = NULL; | |
1076 | stmt = build_fold_addr_expr (gcov_info_var); | |
1077 | stmt = build_call_expr (init_fn, 1, stmt); | |
1078 | append_to_statement_list (stmt, &ctor); | |
1079 | ||
78681a7b ML |
1080 | /* Generate a constructor to run it. */ |
1081 | int priority = SUPPORTS_INIT_PRIORITY | |
1082 | ? MAX_RESERVED_INIT_PRIORITY: DEFAULT_INIT_PRIORITY; | |
1083 | cgraph_build_static_cdtor ('I', ctor, priority); | |
8c9434c2 ML |
1084 | } |
1085 | ||
1086 | /* Generate the destructor function to call __gcov_exit. */ | |
1087 | ||
1088 | static void | |
1089 | build_gcov_exit_decl (void) | |
1090 | { | |
1091 | tree init_fn = build_function_type_list (void_type_node, void_type_node, | |
1092 | NULL); | |
1093 | init_fn = build_decl (BUILTINS_LOCATION, FUNCTION_DECL, | |
1094 | get_identifier ("__gcov_exit"), init_fn); | |
1095 | TREE_PUBLIC (init_fn) = 1; | |
1096 | DECL_EXTERNAL (init_fn) = 1; | |
1097 | DECL_ASSEMBLER_NAME (init_fn); | |
1098 | ||
1099 | /* Generate a call to __gcov_exit (). */ | |
1100 | tree dtor = NULL; | |
1101 | tree stmt = build_call_expr (init_fn, 0); | |
1102 | append_to_statement_list (stmt, &dtor); | |
1103 | ||
78681a7b ML |
1104 | /* Generate a destructor to run it. */ |
1105 | int priority = SUPPORTS_INIT_PRIORITY | |
1106 | ? MAX_RESERVED_INIT_PRIORITY: DEFAULT_INIT_PRIORITY; | |
1107 | ||
1108 | cgraph_build_static_cdtor ('D', dtor, priority); | |
d6d7eee1 GW |
1109 | } |
1110 | ||
b724567e NS |
1111 | /* Create the gcov_info types and object. Generate the constructor |
1112 | function to call __gcov_init. Does not generate the initializer | |
1113 | for the object. Returns TRUE if coverage data is being emitted. */ | |
ca29da43 | 1114 | |
b724567e NS |
1115 | static bool |
1116 | coverage_obj_init (void) | |
ca29da43 | 1117 | { |
d6d7eee1 | 1118 | tree gcov_info_type; |
b724567e | 1119 | unsigned n_counters = 0; |
5366b186 | 1120 | unsigned ix; |
b724567e NS |
1121 | struct coverage_data *fn; |
1122 | struct coverage_data **fn_prev; | |
c9b9aa64 | 1123 | char name_buf[32]; |
ca29da43 | 1124 | |
6d70e6be | 1125 | no_coverage = 1; /* Disable any further coverage. */ |
159b3be1 | 1126 | |
cdb23767 | 1127 | if (!prg_ctr_mask) |
b724567e | 1128 | return false; |
159b3be1 | 1129 | |
3dafb85c ML |
1130 | if (symtab->dump_file) |
1131 | fprintf (symtab->dump_file, "Using data file %s\n", da_file_name); | |
ca29da43 | 1132 | |
b724567e | 1133 | /* Prune functions. */ |
5366b186 NS |
1134 | for (fn_prev = &functions_head; (fn = *fn_prev);) |
1135 | if (DECL_STRUCT_FUNCTION (fn->fn_decl)) | |
b724567e | 1136 | fn_prev = &fn->next; |
5366b186 NS |
1137 | else |
1138 | /* The function is not being emitted, remove from list. */ | |
1139 | *fn_prev = fn->next; | |
b724567e | 1140 | |
0f9fb22f JJ |
1141 | if (functions_head == NULL) |
1142 | return false; | |
1143 | ||
b724567e NS |
1144 | for (ix = 0; ix != GCOV_COUNTERS; ix++) |
1145 | if ((1u << ix) & prg_ctr_mask) | |
1146 | n_counters++; | |
5366b186 NS |
1147 | |
1148 | /* Build the info and fn_info types. These are mutually recursive. */ | |
1149 | gcov_info_type = lang_hooks.types.make_type (RECORD_TYPE); | |
b724567e | 1150 | gcov_fn_info_type = lang_hooks.types.make_type (RECORD_TYPE); |
dafb7b56 JH |
1151 | build_fn_info_type (gcov_fn_info_type, n_counters, gcov_info_type); |
1152 | gcov_info_type = lang_hooks.types.make_type (RECORD_TYPE); | |
b724567e NS |
1153 | gcov_fn_info_ptr_type = build_pointer_type |
1154 | (build_qualified_type (gcov_fn_info_type, TYPE_QUAL_CONST)); | |
b724567e | 1155 | build_info_type (gcov_info_type, gcov_fn_info_ptr_type); |
5366b186 NS |
1156 | |
1157 | /* Build the gcov info var, this is referred to in its own | |
1158 | initializer. */ | |
b724567e NS |
1159 | gcov_info_var = build_decl (BUILTINS_LOCATION, |
1160 | VAR_DECL, NULL_TREE, gcov_info_type); | |
1161 | TREE_STATIC (gcov_info_var) = 1; | |
c9b9aa64 | 1162 | ASM_GENERATE_INTERNAL_LABEL (name_buf, "LPBX", 0); |
b724567e | 1163 | DECL_NAME (gcov_info_var) = get_identifier (name_buf); |
ca29da43 | 1164 | |
d6d7eee1 | 1165 | build_init_ctor (gcov_info_type); |
8c9434c2 | 1166 | build_gcov_exit_decl (); |
b724567e NS |
1167 | |
1168 | return true; | |
ca29da43 | 1169 | } |
b724567e NS |
1170 | |
1171 | /* Generate the coverage function info for FN and DATA. Append a | |
1172 | pointer to that object to CTOR and return the appended CTOR. */ | |
1173 | ||
9771b263 DN |
1174 | static vec<constructor_elt, va_gc> * |
1175 | coverage_obj_fn (vec<constructor_elt, va_gc> *ctor, tree fn, | |
b724567e NS |
1176 | struct coverage_data const *data) |
1177 | { | |
1178 | tree init = build_fn_info (data, gcov_fn_info_type, gcov_info_var); | |
1179 | tree var = build_var (fn, gcov_fn_info_type, -1); | |
1180 | ||
1181 | DECL_INITIAL (var) = init; | |
9041d2e6 | 1182 | varpool_node::finalize_decl (var); |
b724567e NS |
1183 | |
1184 | CONSTRUCTOR_APPEND_ELT (ctor, NULL, | |
1185 | build1 (ADDR_EXPR, gcov_fn_info_ptr_type, var)); | |
1186 | return ctor; | |
1187 | } | |
1188 | ||
1189 | /* Finalize the coverage data. Generates the array of pointers to | |
1190 | function objects from CTOR. Generate the gcov_info initializer. */ | |
1191 | ||
1192 | static void | |
9771b263 | 1193 | coverage_obj_finish (vec<constructor_elt, va_gc> *ctor) |
b724567e | 1194 | { |
9771b263 | 1195 | unsigned n_functions = vec_safe_length (ctor); |
b724567e NS |
1196 | tree fn_info_ary_type = build_array_type |
1197 | (build_qualified_type (gcov_fn_info_ptr_type, TYPE_QUAL_CONST), | |
1198 | build_index_type (size_int (n_functions - 1))); | |
1199 | tree fn_info_ary = build_decl (BUILTINS_LOCATION, VAR_DECL, NULL_TREE, | |
1200 | fn_info_ary_type); | |
1201 | char name_buf[32]; | |
1202 | ||
1203 | TREE_STATIC (fn_info_ary) = 1; | |
1204 | ASM_GENERATE_INTERNAL_LABEL (name_buf, "LPBX", 1); | |
1205 | DECL_NAME (fn_info_ary) = get_identifier (name_buf); | |
1206 | DECL_INITIAL (fn_info_ary) = build_constructor (fn_info_ary_type, ctor); | |
9041d2e6 | 1207 | varpool_node::finalize_decl (fn_info_ary); |
b724567e NS |
1208 | |
1209 | DECL_INITIAL (gcov_info_var) | |
1210 | = build_info (TREE_TYPE (gcov_info_var), fn_info_ary); | |
9041d2e6 | 1211 | varpool_node::finalize_decl (gcov_info_var); |
b724567e NS |
1212 | } |
1213 | ||
ca29da43 | 1214 | /* Perform file-level initialization. Read in data file, generate name |
efbb59b2 | 1215 | of notes file. */ |
ca29da43 NS |
1216 | |
1217 | void | |
159b3be1 | 1218 | coverage_init (const char *filename) |
ca29da43 NS |
1219 | { |
1220 | int len = strlen (filename); | |
b724567e | 1221 | int prefix_len = 0; |
b8698a0f | 1222 | |
103ff0d6 TJ |
1223 | /* Since coverage_init is invoked very early, before the pass |
1224 | manager, we need to set up the dumping explicitly. This is | |
1225 | similar to the handling in finish_optimization_passes. */ | |
47e0da37 DM |
1226 | int profile_pass_num = |
1227 | g->get_passes ()->get_pass_profile ()->static_pass_number; | |
1228 | g->get_dumps ()->dump_start (profile_pass_num, NULL); | |
103ff0d6 | 1229 | |
b724567e | 1230 | if (!profile_data_prefix && !IS_ABSOLUTE_PATH (filename)) |
2f908293 SP |
1231 | profile_data_prefix = getpwd (); |
1232 | ||
b724567e NS |
1233 | if (profile_data_prefix) |
1234 | prefix_len = strlen (profile_data_prefix); | |
ca29da43 | 1235 | |
796621e8 | 1236 | /* Name of da file. */ |
b8698a0f | 1237 | da_file_name = XNEWVEC (char, len + strlen (GCOV_DATA_SUFFIX) |
b724567e | 1238 | + prefix_len + 2); |
2f908293 SP |
1239 | |
1240 | if (profile_data_prefix) | |
1241 | { | |
b724567e NS |
1242 | memcpy (da_file_name, profile_data_prefix, prefix_len); |
1243 | da_file_name[prefix_len++] = '/'; | |
2f908293 | 1244 | } |
b724567e NS |
1245 | memcpy (da_file_name + prefix_len, filename, len); |
1246 | strcpy (da_file_name + prefix_len + len, GCOV_DATA_SUFFIX); | |
159b3be1 | 1247 | |
cb686b99 NS |
1248 | bbg_file_stamp = local_tick; |
1249 | ||
be3c16c4 DC |
1250 | if (flag_auto_profile) |
1251 | read_autofdo_file (); | |
1252 | else if (flag_branch_probabilities) | |
cb686b99 NS |
1253 | read_counts_file (); |
1254 | ||
796621e8 | 1255 | /* Name of bbg file. */ |
b724567e NS |
1256 | if (flag_test_coverage && !flag_compare_debug) |
1257 | { | |
1258 | bbg_file_name = XNEWVEC (char, len + strlen (GCOV_NOTE_SUFFIX) + 1); | |
1259 | memcpy (bbg_file_name, filename, len); | |
1260 | strcpy (bbg_file_name + len, GCOV_NOTE_SUFFIX); | |
1261 | ||
1262 | if (!gcov_open (bbg_file_name, -1)) | |
1263 | { | |
1264 | error ("cannot open %s", bbg_file_name); | |
1265 | bbg_file_name = NULL; | |
1266 | } | |
1267 | else | |
1268 | { | |
1269 | gcov_write_unsigned (GCOV_NOTE_MAGIC); | |
1270 | gcov_write_unsigned (GCOV_VERSION); | |
cb686b99 | 1271 | gcov_write_unsigned (bbg_file_stamp); |
93814e2d ML |
1272 | |
1273 | /* Do not support has_unexecuted_blocks for Ada. */ | |
1274 | gcov_write_unsigned (strcmp (lang_hooks.name, "GNU Ada") != 0); | |
b724567e NS |
1275 | } |
1276 | } | |
103ff0d6 | 1277 | |
47e0da37 | 1278 | g->get_dumps ()->dump_finish (profile_pass_num); |
ca29da43 NS |
1279 | } |
1280 | ||
efbb59b2 | 1281 | /* Performs file-level cleanup. Close notes file, generate coverage |
ca29da43 NS |
1282 | variables and constructor. */ |
1283 | ||
1284 | void | |
159b3be1 | 1285 | coverage_finish (void) |
ca29da43 | 1286 | { |
b724567e NS |
1287 | if (bbg_file_name && gcov_close ()) |
1288 | unlink (bbg_file_name); | |
cb686b99 NS |
1289 | |
1290 | if (!flag_branch_probabilities && flag_test_coverage | |
1291 | && (!local_tick || local_tick == (unsigned)-1)) | |
1292 | /* Only remove the da file, if we're emitting coverage code and | |
1293 | cannot uniquely stamp it. If we can stamp it, libgcov will DTRT. */ | |
b724567e NS |
1294 | unlink (da_file_name); |
1295 | ||
1296 | if (coverage_obj_init ()) | |
ca29da43 | 1297 | { |
9771b263 | 1298 | vec<constructor_elt, va_gc> *fn_ctor = NULL; |
b724567e NS |
1299 | struct coverage_data *fn; |
1300 | ||
1301 | for (fn = functions_head; fn; fn = fn->next) | |
1302 | fn_ctor = coverage_obj_fn (fn_ctor, fn->fn_decl, fn); | |
1303 | coverage_obj_finish (fn_ctor); | |
ca29da43 | 1304 | } |
782f0db2 DM |
1305 | |
1306 | XDELETEVEC (da_file_name); | |
1307 | da_file_name = NULL; | |
ca29da43 NS |
1308 | } |
1309 | ||
ca29da43 | 1310 | #include "gt-coverage.h" |