Mercurial > hg > CbC > CbC_gcc
annotate gcc/coverage.c @ 131:84e7813d76e9
gcc-8.2
| author | mir3636 |
|---|---|
| date | Thu, 25 Oct 2018 07:37:49 +0900 |
| parents | 04ced10e8804 |
| children | 1830386684a0 |
| rev | line source |
|---|---|
| 0 | 1 /* Read and write coverage files, and associated functionality. |
| 131 | 2 Copyright (C) 1990-2018 Free Software Foundation, Inc. |
| 0 | 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 | |
| 12 Software Foundation; either version 3, or (at your option) any later | |
| 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 | |
| 21 along with GCC; see the file COPYING3. If not see | |
| 22 <http://www.gnu.org/licenses/>. */ | |
| 23 | |
| 24 | |
| 25 #define GCOV_LINKAGE | |
| 26 | |
| 27 #include "config.h" | |
| 28 #include "system.h" | |
| 29 #include "coretypes.h" | |
| 111 | 30 #include "backend.h" |
| 31 #include "target.h" | |
| 0 | 32 #include "rtl.h" |
| 33 #include "tree.h" | |
| 111 | 34 #include "tree-pass.h" |
| 35 #include "memmodel.h" | |
| 0 | 36 #include "tm_p.h" |
| 111 | 37 #include "stringpool.h" |
| 38 #include "cgraph.h" | |
| 0 | 39 #include "coverage.h" |
| 111 | 40 #include "diagnostic-core.h" |
| 41 #include "fold-const.h" | |
| 42 #include "stor-layout.h" | |
| 43 #include "output.h" | |
| 44 #include "toplev.h" | |
| 0 | 45 #include "langhooks.h" |
| 46 #include "tree-iterator.h" | |
| 111 | 47 #include "context.h" |
| 48 #include "pass_manager.h" | |
|
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49 #include "intl.h" |
| 111 | 50 #include "params.h" |
| 51 #include "auto-profile.h" | |
| 131 | 52 #include "profile.h" |
| 0 | 53 |
| 54 #include "gcov-io.c" | |
| 55 | |
| 111 | 56 struct GTY((chain_next ("%h.next"))) coverage_data |
| 0 | 57 { |
| 111 | 58 struct coverage_data *next; /* next function */ |
| 0 | 59 unsigned ident; /* function ident */ |
| 111 | 60 unsigned lineno_checksum; /* function lineno checksum */ |
| 61 unsigned cfg_checksum; /* function cfg checksum */ | |
| 62 tree fn_decl; /* the function decl */ | |
| 63 tree ctr_vars[GCOV_COUNTERS]; /* counter variables. */ | |
| 0 | 64 }; |
| 65 | |
| 66 /* Counts information for a function. */ | |
| 111 | 67 struct counts_entry : pointer_hash <counts_entry> |
| 0 | 68 { |
| 69 /* We hash by */ | |
| 70 unsigned ident; | |
| 71 unsigned ctr; | |
| 72 | |
| 73 /* Store */ | |
| 111 | 74 unsigned lineno_checksum; |
| 75 unsigned cfg_checksum; | |
| 0 | 76 gcov_type *counts; |
| 77 | |
| 111 | 78 /* hash_table support. */ |
| 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 *); | |
| 82 }; | |
| 0 | 83 |
| 111 | 84 static GTY(()) struct coverage_data *functions_head = 0; |
| 85 static struct coverage_data **functions_tail = &functions_head; | |
| 0 | 86 static unsigned no_coverage = 0; |
| 87 | |
| 88 /* Cumulative counter information for whole program. */ | |
| 89 static unsigned prg_ctr_mask; /* Mask of counter types generated. */ | |
| 90 | |
| 91 /* Counter information for current function. */ | |
| 92 static unsigned fn_ctr_mask; /* Mask of counters used. */ | |
| 111 | 93 static GTY(()) tree fn_v_ctrs[GCOV_COUNTERS]; /* counter variables. */ |
| 0 | 94 static unsigned fn_n_ctrs[GCOV_COUNTERS]; /* Counters allocated. */ |
| 95 static unsigned fn_b_ctrs[GCOV_COUNTERS]; /* Allocation base. */ | |
| 96 | |
| 111 | 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 | |
| 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. */ | |
| 0 | 106 static char *bbg_file_name; |
| 107 | |
| 111 | 108 /* File stamp for notes file. */ |
| 109 static unsigned bbg_file_stamp; | |
| 110 | |
| 111 /* Name of the count data (gcda) file. */ | |
| 0 | 112 static char *da_file_name; |
| 113 | |
| 114 /* The names of merge functions for counters. */ | |
| 111 | 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 | |
| 0 | 128 |
| 129 /* Forward declarations. */ | |
| 130 static void read_counts_file (void); | |
| 111 | 131 static tree build_var (tree, tree, int); |
| 132 static void build_fn_info_type (tree, unsigned, tree); | |
| 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); | |
| 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> *); | |
| 0 | 140 |
| 141 /* Return the type node for gcov_type. */ | |
| 142 | |
| 143 tree | |
| 144 get_gcov_type (void) | |
| 145 { | |
| 111 | 146 scalar_int_mode mode |
| 147 = smallest_int_mode_for_size (LONG_LONG_TYPE_SIZE > 32 ? 64 : 32); | |
| 148 return lang_hooks.types.type_for_mode (mode, false); | |
| 0 | 149 } |
| 150 | |
| 151 /* Return the type node for gcov_unsigned_t. */ | |
| 152 | |
| 153 static tree | |
| 154 get_gcov_unsigned_t (void) | |
| 155 { | |
| 111 | 156 scalar_int_mode mode = smallest_int_mode_for_size (32); |
| 157 return lang_hooks.types.type_for_mode (mode, true); | |
| 0 | 158 } |
| 159 | |
| 111 | 160 inline hashval_t |
| 161 counts_entry::hash (const counts_entry *entry) | |
| 0 | 162 { |
| 163 return entry->ident * GCOV_COUNTERS + entry->ctr; | |
| 164 } | |
| 165 | |
| 111 | 166 inline int |
| 167 counts_entry::equal (const counts_entry *entry1, const counts_entry *entry2) | |
| 0 | 168 { |
| 169 return entry1->ident == entry2->ident && entry1->ctr == entry2->ctr; | |
| 170 } | |
| 171 | |
| 111 | 172 inline void |
| 173 counts_entry::remove (counts_entry *entry) | |
| 0 | 174 { |
| 175 free (entry->counts); | |
| 176 free (entry); | |
| 177 } | |
| 178 | |
| 111 | 179 /* Hash table of count data. */ |
| 180 static hash_table<counts_entry> *counts_hash; | |
| 181 | |
| 0 | 182 /* Read in the counts file, if available. */ |
| 183 | |
| 184 static void | |
| 185 read_counts_file (void) | |
| 186 { | |
| 187 gcov_unsigned_t fn_ident = 0; | |
| 188 gcov_unsigned_t tag; | |
| 189 int is_error = 0; | |
| 111 | 190 unsigned lineno_checksum = 0; |
| 191 unsigned cfg_checksum = 0; | |
| 0 | 192 |
| 193 if (!gcov_open (da_file_name, 1)) | |
| 194 return; | |
| 195 | |
| 196 if (!gcov_magic (gcov_read_unsigned (), GCOV_DATA_MAGIC)) | |
| 197 { | |
| 198 warning (0, "%qs is not a gcov data file", da_file_name); | |
| 199 gcov_close (); | |
| 200 return; | |
| 201 } | |
| 202 else if ((tag = gcov_read_unsigned ()) != GCOV_VERSION) | |
| 203 { | |
| 204 char v[4], e[4]; | |
| 205 | |
| 206 GCOV_UNSIGNED2STRING (v, tag); | |
| 207 GCOV_UNSIGNED2STRING (e, GCOV_VERSION); | |
| 208 | |
| 209 warning (0, "%qs is version %q.*s, expected version %q.*s", | |
| 210 da_file_name, 4, v, 4, e); | |
| 211 gcov_close (); | |
| 212 return; | |
| 213 } | |
| 214 | |
| 111 | 215 /* Read the stamp, used for creating a generation count. */ |
| 216 tag = gcov_read_unsigned (); | |
| 217 bbg_file_stamp = crc32_unsigned (bbg_file_stamp, tag); | |
|
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218 |
| 111 | 219 counts_hash = new hash_table<counts_entry> (10); |
| 0 | 220 while ((tag = gcov_read_unsigned ())) |
| 221 { | |
| 222 gcov_unsigned_t length; | |
| 223 gcov_position_t offset; | |
| 224 | |
| 225 length = gcov_read_unsigned (); | |
| 226 offset = gcov_position (); | |
| 227 if (tag == GCOV_TAG_FUNCTION) | |
| 228 { | |
| 111 | 229 if (length) |
| 0 | 230 { |
| 111 | 231 fn_ident = gcov_read_unsigned (); |
| 232 lineno_checksum = gcov_read_unsigned (); | |
| 233 cfg_checksum = gcov_read_unsigned (); | |
| 0 | 234 } |
| 111 | 235 else |
| 236 fn_ident = lineno_checksum = cfg_checksum = 0; | |
| 0 | 237 } |
| 131 | 238 else if (tag == GCOV_TAG_OBJECT_SUMMARY) |
| 0 | 239 { |
| 131 | 240 profile_info = XCNEW (gcov_summary); |
| 241 profile_info->runs = gcov_read_unsigned (); | |
| 242 profile_info->sum_max = gcov_read_unsigned (); | |
| 0 | 243 } |
| 244 else if (GCOV_TAG_IS_COUNTER (tag) && fn_ident) | |
| 245 { | |
| 111 | 246 counts_entry **slot, *entry, elt; |
| 0 | 247 unsigned n_counts = GCOV_TAG_COUNTER_NUM (length); |
| 248 unsigned ix; | |
| 249 | |
| 250 elt.ident = fn_ident; | |
| 251 elt.ctr = GCOV_COUNTER_FOR_TAG (tag); | |
| 252 | |
| 111 | 253 slot = counts_hash->find_slot (&elt, INSERT); |
| 0 | 254 entry = *slot; |
| 255 if (!entry) | |
| 256 { | |
| 111 | 257 *slot = entry = XCNEW (counts_entry); |
| 258 entry->ident = fn_ident; | |
| 0 | 259 entry->ctr = elt.ctr; |
| 111 | 260 entry->lineno_checksum = lineno_checksum; |
| 261 entry->cfg_checksum = cfg_checksum; | |
| 0 | 262 entry->counts = XCNEWVEC (gcov_type, n_counts); |
| 263 } | |
| 111 | 264 else if (entry->lineno_checksum != lineno_checksum |
| 265 || entry->cfg_checksum != cfg_checksum) | |
| 0 | 266 { |
| 111 | 267 error ("Profile data for function %u is corrupted", fn_ident); |
| 268 error ("checksum is (%x,%x) instead of (%x,%x)", | |
| 269 entry->lineno_checksum, entry->cfg_checksum, | |
| 270 lineno_checksum, cfg_checksum); | |
| 271 delete counts_hash; | |
| 272 counts_hash = NULL; | |
| 0 | 273 break; |
| 274 } | |
| 275 for (ix = 0; ix != n_counts; ix++) | |
| 276 entry->counts[ix] += gcov_read_counter (); | |
| 277 } | |
| 278 gcov_sync (offset, length); | |
| 279 if ((is_error = gcov_is_error ())) | |
| 280 { | |
| 111 | 281 error (is_error < 0 |
| 282 ? G_("%qs has overflowed") | |
| 283 : G_("%qs is corrupted"), | |
| 0 | 284 da_file_name); |
| 111 | 285 delete counts_hash; |
| 286 counts_hash = NULL; | |
| 0 | 287 break; |
| 288 } | |
| 289 } | |
| 290 | |
| 291 gcov_close (); | |
| 292 } | |
| 293 | |
| 294 /* Returns the counters for a particular tag. */ | |
| 295 | |
| 296 gcov_type * | |
| 131 | 297 get_coverage_counts (unsigned counter, unsigned cfg_checksum, |
| 298 unsigned lineno_checksum) | |
| 0 | 299 { |
| 111 | 300 counts_entry *entry, elt; |
| 0 | 301 |
| 302 /* No hash table, no counts. */ | |
| 303 if (!counts_hash) | |
| 304 { | |
| 305 static int warned = 0; | |
| 306 | |
| 131 | 307 if (!warned++) |
| 308 { | |
| 309 warning (OPT_Wmissing_profile, | |
| 310 "%qs profile count data file not found", | |
| 311 da_file_name); | |
| 312 if (dump_enabled_p ()) | |
| 313 { | |
| 314 dump_user_location_t loc | |
| 315 = dump_user_location_t::from_location_t (input_location); | |
| 316 dump_printf_loc (MSG_MISSED_OPTIMIZATION, loc, | |
| 317 "file %s not found, %s\n", da_file_name, | |
| 318 (flag_guess_branch_prob | |
| 319 ? "execution counts estimated" | |
| 320 : "execution counts assumed to be zero")); | |
| 321 } | |
| 322 } | |
| 0 | 323 return NULL; |
| 324 } | |
| 111 | 325 if (PARAM_VALUE (PARAM_PROFILE_FUNC_INTERNAL_ID)) |
| 326 elt.ident = current_function_funcdef_no + 1; | |
| 327 else | |
| 0 | 328 { |
| 111 | 329 gcc_assert (coverage_node_map_initialized_p ()); |
| 330 elt.ident = cgraph_node::get (cfun->decl)->profile_id; | |
| 0 | 331 } |
| 111 | 332 elt.ctr = counter; |
| 333 entry = counts_hash->find (&elt); | |
| 131 | 334 if (!entry) |
| 335 { | |
| 336 if (counter == GCOV_COUNTER_ARCS) | |
| 337 warning_at (DECL_SOURCE_LOCATION (current_function_decl), | |
| 338 OPT_Wmissing_profile, | |
| 339 "profile for function %qD not found in profile data", | |
| 340 current_function_decl); | |
| 341 /* The function was not emitted, or is weak and not chosen in the | |
| 342 final executable. Silently fail, because there's nothing we | |
| 343 can do about it. */ | |
| 344 return NULL; | |
| 345 } | |
| 111 | 346 |
| 131 | 347 if (entry->cfg_checksum != cfg_checksum) |
| 0 | 348 { |
| 349 static int warned = 0; | |
|
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350 bool warning_printed = false; |
| 0 | 351 |
| 111 | 352 warning_printed = |
| 131 | 353 warning_at (DECL_SOURCE_LOCATION (current_function_decl), |
| 354 OPT_Wcoverage_mismatch, | |
| 355 "the control flow of function %qD does not match " | |
| 356 "its profile data (counter %qs)", current_function_decl, | |
| 357 ctr_names[counter]); | |
| 111 | 358 if (warning_printed && dump_enabled_p ()) |
| 0 | 359 { |
| 131 | 360 dump_user_location_t loc |
| 361 = dump_user_location_t::from_location_t (input_location); | |
| 362 dump_printf_loc (MSG_MISSED_OPTIMIZATION, loc, | |
| 111 | 363 "use -Wno-error=coverage-mismatch to tolerate " |
| 364 "the mismatch but performance may drop if the " | |
| 365 "function is hot\n"); | |
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366 |
|
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367 if (!seen_error () |
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368 && !warned++) |
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369 { |
| 131 | 370 dump_printf_loc (MSG_MISSED_OPTIMIZATION, loc, |
| 111 | 371 "coverage mismatch ignored\n"); |
| 131 | 372 dump_printf (MSG_MISSED_OPTIMIZATION, |
| 111 | 373 flag_guess_branch_prob |
| 374 ? G_("execution counts estimated\n") | |
| 375 : G_("execution counts assumed to be zero\n")); | |
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376 if (!flag_guess_branch_prob) |
| 131 | 377 dump_printf (MSG_MISSED_OPTIMIZATION, |
| 111 | 378 "this can result in poorly optimized code\n"); |
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379 } |
| 0 | 380 } |
| 381 | |
| 382 return NULL; | |
| 383 } | |
| 111 | 384 else if (entry->lineno_checksum != lineno_checksum) |
| 385 { | |
| 131 | 386 warning_at (DECL_SOURCE_LOCATION (current_function_decl), |
| 387 OPT_Wcoverage_mismatch, | |
| 388 "source locations for function %qD have changed," | |
| 389 " the profile data may be out of date", | |
| 390 current_function_decl); | |
| 111 | 391 } |
| 0 | 392 |
| 393 return entry->counts; | |
| 394 } | |
| 395 | |
| 396 /* Allocate NUM counters of type COUNTER. Returns nonzero if the | |
| 397 allocation succeeded. */ | |
| 398 | |
| 399 int | |
| 400 coverage_counter_alloc (unsigned counter, unsigned num) | |
| 401 { | |
| 402 if (no_coverage) | |
| 403 return 0; | |
| 404 | |
| 405 if (!num) | |
| 406 return 1; | |
| 407 | |
| 111 | 408 if (!fn_v_ctrs[counter]) |
| 0 | 409 { |
| 111 | 410 tree array_type = build_array_type (get_gcov_type (), NULL_TREE); |
| 0 | 411 |
| 111 | 412 fn_v_ctrs[counter] |
| 413 = build_var (current_function_decl, array_type, counter); | |
| 0 | 414 } |
| 111 | 415 |
| 0 | 416 fn_b_ctrs[counter] = fn_n_ctrs[counter]; |
| 417 fn_n_ctrs[counter] += num; | |
| 111 | 418 |
| 0 | 419 fn_ctr_mask |= 1 << counter; |
| 420 return 1; | |
| 421 } | |
| 422 | |
| 423 /* Generate a tree to access COUNTER NO. */ | |
| 424 | |
| 425 tree | |
| 426 tree_coverage_counter_ref (unsigned counter, unsigned no) | |
| 427 { | |
| 428 tree gcov_type_node = get_gcov_type (); | |
| 429 | |
| 430 gcc_assert (no < fn_n_ctrs[counter] - fn_b_ctrs[counter]); | |
| 431 | |
| 111 | 432 no += fn_b_ctrs[counter]; |
| 433 | |
| 0 | 434 /* "no" here is an array index, scaled to bytes later. */ |
| 111 | 435 return build4 (ARRAY_REF, gcov_type_node, fn_v_ctrs[counter], |
| 436 build_int_cst (integer_type_node, no), NULL, NULL); | |
| 0 | 437 } |
| 438 | |
| 439 /* Generate a tree to access the address of COUNTER NO. */ | |
| 440 | |
| 441 tree | |
| 442 tree_coverage_counter_addr (unsigned counter, unsigned no) | |
| 443 { | |
| 444 tree gcov_type_node = get_gcov_type (); | |
| 445 | |
| 446 gcc_assert (no < fn_n_ctrs[counter] - fn_b_ctrs[counter]); | |
| 111 | 447 no += fn_b_ctrs[counter]; |
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448 |
| 0 | 449 /* "no" here is an array index, scaled to bytes later. */ |
| 450 return build_fold_addr_expr (build4 (ARRAY_REF, gcov_type_node, | |
| 111 | 451 fn_v_ctrs[counter], |
| 452 build_int_cst (integer_type_node, no), | |
| 0 | 453 NULL, NULL)); |
| 454 } | |
| 455 | |
| 111 | 456 |
| 0 | 457 /* Generate a checksum for a string. CHKSUM is the current |
| 458 checksum. */ | |
| 459 | |
| 460 static unsigned | |
| 461 coverage_checksum_string (unsigned chksum, const char *string) | |
| 462 { | |
| 463 int i; | |
| 464 char *dup = NULL; | |
| 465 | |
| 466 /* Look for everything that looks if it were produced by | |
| 467 get_file_function_name and zero out the second part | |
| 468 that may result from flag_random_seed. This is not critical | |
| 469 as the checksums are used only for sanity checking. */ | |
| 470 for (i = 0; string[i]; i++) | |
| 471 { | |
| 472 int offset = 0; | |
| 473 if (!strncmp (string + i, "_GLOBAL__N_", 11)) | |
| 474 offset = 11; | |
| 475 if (!strncmp (string + i, "_GLOBAL__", 9)) | |
| 476 offset = 9; | |
| 477 | |
| 478 /* C++ namespaces do have scheme: | |
| 479 _GLOBAL__N_<filename>_<wrongmagicnumber>_<magicnumber>functionname | |
| 480 since filename might contain extra underscores there seems | |
| 481 to be no better chance then walk all possible offsets looking | |
| 482 for magicnumber. */ | |
| 483 if (offset) | |
| 484 { | |
| 485 for (i = i + offset; string[i]; i++) | |
| 486 if (string[i]=='_') | |
| 487 { | |
| 488 int y; | |
| 489 | |
| 490 for (y = 1; y < 9; y++) | |
| 491 if (!(string[i + y] >= '0' && string[i + y] <= '9') | |
| 492 && !(string[i + y] >= 'A' && string[i + y] <= 'F')) | |
| 493 break; | |
| 494 if (y != 9 || string[i + 9] != '_') | |
| 495 continue; | |
| 496 for (y = 10; y < 18; y++) | |
| 497 if (!(string[i + y] >= '0' && string[i + y] <= '9') | |
| 498 && !(string[i + y] >= 'A' && string[i + y] <= 'F')) | |
| 499 break; | |
| 500 if (y != 18) | |
| 501 continue; | |
| 502 if (!dup) | |
| 503 string = dup = xstrdup (string); | |
| 504 for (y = 10; y < 18; y++) | |
| 505 dup[i + y] = '0'; | |
| 506 } | |
| 507 break; | |
| 508 } | |
| 509 } | |
| 510 | |
| 511 chksum = crc32_string (chksum, string); | |
| 111 | 512 free (dup); |
| 0 | 513 |
| 514 return chksum; | |
| 515 } | |
| 516 | |
| 517 /* Compute checksum for the current function. We generate a CRC32. */ | |
| 518 | |
| 111 | 519 unsigned |
| 520 coverage_compute_lineno_checksum (void) | |
| 0 | 521 { |
| 522 expanded_location xloc | |
| 523 = expand_location (DECL_SOURCE_LOCATION (current_function_decl)); | |
| 524 unsigned chksum = xloc.line; | |
| 525 | |
| 111 | 526 if (xloc.file) |
| 527 chksum = coverage_checksum_string (chksum, xloc.file); | |
| 0 | 528 chksum = coverage_checksum_string |
| 529 (chksum, IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (current_function_decl))); | |
| 530 | |
| 531 return chksum; | |
| 532 } | |
| 111 | 533 |
| 534 /* Compute profile ID. This is better to be unique in whole program. */ | |
| 535 | |
| 536 unsigned | |
| 537 coverage_compute_profile_id (struct cgraph_node *n) | |
| 538 { | |
| 539 unsigned chksum; | |
| 0 | 540 |
| 111 | 541 /* Externally visible symbols have unique name. */ |
| 542 if (TREE_PUBLIC (n->decl) || DECL_EXTERNAL (n->decl) || n->unique_name) | |
| 543 { | |
| 544 chksum = coverage_checksum_string | |
| 545 (0, IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (n->decl))); | |
| 546 } | |
| 547 else | |
| 0 | 548 { |
| 549 expanded_location xloc | |
| 111 | 550 = expand_location (DECL_SOURCE_LOCATION (n->decl)); |
| 551 bool use_name_only = (PARAM_VALUE (PARAM_PROFILE_FUNC_INTERNAL_ID) == 0); | |
| 552 | |
| 553 chksum = (use_name_only ? 0 : xloc.line); | |
| 554 if (xloc.file) | |
| 555 chksum = coverage_checksum_string (chksum, xloc.file); | |
| 556 chksum = coverage_checksum_string | |
| 557 (chksum, IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (n->decl))); | |
| 558 if (!use_name_only && first_global_object_name) | |
| 559 chksum = coverage_checksum_string | |
| 560 (chksum, first_global_object_name); | |
| 561 chksum = coverage_checksum_string | |
| 562 (chksum, aux_base_name); | |
| 563 } | |
| 564 | |
| 565 /* Non-negative integers are hopefully small enough to fit in all targets. | |
| 566 Gcov file formats wants non-zero function IDs. */ | |
| 567 chksum = chksum & 0x7fffffff; | |
| 568 return chksum + (!chksum); | |
| 569 } | |
| 570 | |
| 571 /* Compute cfg checksum for the function FN given as argument. | |
| 572 The checksum is calculated carefully so that | |
| 573 source code changes that doesn't affect the control flow graph | |
| 574 won't change the checksum. | |
| 575 This is to make the profile data useable across source code change. | |
| 576 The downside of this is that the compiler may use potentially | |
| 577 wrong profile data - that the source code change has non-trivial impact | |
| 578 on the validity of profile data (e.g. the reversed condition) | |
| 579 but the compiler won't detect the change and use the wrong profile data. */ | |
| 580 | |
| 581 unsigned | |
| 582 coverage_compute_cfg_checksum (struct function *fn) | |
| 583 { | |
| 584 basic_block bb; | |
| 585 unsigned chksum = n_basic_blocks_for_fn (fn); | |
| 0 | 586 |
| 111 | 587 FOR_EACH_BB_FN (bb, fn) |
| 588 { | |
| 589 edge e; | |
| 590 edge_iterator ei; | |
| 591 chksum = crc32_byte (chksum, bb->index); | |
| 592 FOR_EACH_EDGE (e, ei, bb->succs) | |
| 593 { | |
| 594 chksum = crc32_byte (chksum, e->dest->index); | |
| 595 } | |
| 596 } | |
| 597 | |
| 598 return chksum; | |
| 599 } | |
| 600 | |
| 601 /* Begin output to the notes file for the current function. | |
| 602 Writes the function header. Returns nonzero if data should be output. */ | |
| 603 | |
| 604 int | |
| 605 coverage_begin_function (unsigned lineno_checksum, unsigned cfg_checksum) | |
| 606 { | |
| 607 expanded_location xloc; | |
| 608 unsigned long offset; | |
| 0 | 609 |
| 111 | 610 /* We don't need to output .gcno file unless we're under -ftest-coverage |
| 611 (e.g. -fprofile-arcs/generate/use don't need .gcno to work). */ | |
| 612 if (no_coverage || !bbg_file_name) | |
| 613 return 0; | |
| 614 | |
| 615 xloc = expand_location (DECL_SOURCE_LOCATION (current_function_decl)); | |
| 0 | 616 |
| 111 | 617 /* Announce function */ |
| 618 offset = gcov_write_tag (GCOV_TAG_FUNCTION); | |
| 619 if (PARAM_VALUE (PARAM_PROFILE_FUNC_INTERNAL_ID)) | |
| 620 gcov_write_unsigned (current_function_funcdef_no + 1); | |
| 621 else | |
| 622 { | |
| 623 gcc_assert (coverage_node_map_initialized_p ()); | |
| 624 gcov_write_unsigned ( | |
| 625 cgraph_node::get (current_function_decl)->profile_id); | |
| 0 | 626 } |
| 111 | 627 |
| 628 gcov_write_unsigned (lineno_checksum); | |
| 629 gcov_write_unsigned (cfg_checksum); | |
| 630 gcov_write_string (IDENTIFIER_POINTER | |
| 631 (DECL_ASSEMBLER_NAME (current_function_decl))); | |
| 131 | 632 gcov_write_unsigned (DECL_ARTIFICIAL (current_function_decl) |
| 633 && !DECL_FUNCTION_VERSIONED (current_function_decl) | |
| 634 && !DECL_LAMBDA_FUNCTION (current_function_decl)); | |
| 111 | 635 gcov_write_filename (xloc.file); |
| 636 gcov_write_unsigned (xloc.line); | |
| 131 | 637 gcov_write_unsigned (xloc.column); |
| 638 | |
| 639 expanded_location endloc = expand_location (cfun->function_end_locus); | |
| 640 | |
| 641 /* Function can start in a single file and end in another one. */ | |
| 642 gcov_write_unsigned (endloc.file == xloc.file ? endloc.line : xloc.line); | |
| 111 | 643 gcov_write_length (offset); |
| 644 | |
| 0 | 645 return !gcov_is_error (); |
| 646 } | |
| 647 | |
| 648 /* Finish coverage data for the current function. Verify no output | |
| 649 error has occurred. Save function coverage counts. */ | |
| 650 | |
| 651 void | |
| 111 | 652 coverage_end_function (unsigned lineno_checksum, unsigned cfg_checksum) |
| 0 | 653 { |
| 654 unsigned i; | |
| 655 | |
| 111 | 656 if (bbg_file_name && gcov_is_error ()) |
| 0 | 657 { |
| 658 warning (0, "error writing %qs", bbg_file_name); | |
| 111 | 659 unlink (bbg_file_name); |
| 660 bbg_file_name = NULL; | |
| 0 | 661 } |
| 662 | |
| 663 if (fn_ctr_mask) | |
| 664 { | |
| 111 | 665 struct coverage_data *item = 0; |
| 666 | |
| 667 item = ggc_alloc<coverage_data> (); | |
| 0 | 668 |
| 111 | 669 if (PARAM_VALUE (PARAM_PROFILE_FUNC_INTERNAL_ID)) |
| 670 item->ident = current_function_funcdef_no + 1; | |
| 671 else | |
| 672 { | |
| 673 gcc_assert (coverage_node_map_initialized_p ()); | |
| 674 item->ident = cgraph_node::get (cfun->decl)->profile_id; | |
| 675 } | |
| 0 | 676 |
| 111 | 677 item->lineno_checksum = lineno_checksum; |
| 678 item->cfg_checksum = cfg_checksum; | |
| 679 | |
| 680 item->fn_decl = current_function_decl; | |
| 681 item->next = 0; | |
| 0 | 682 *functions_tail = item; |
| 683 functions_tail = &item->next; | |
| 684 | |
| 685 for (i = 0; i != GCOV_COUNTERS; i++) | |
| 686 { | |
| 111 | 687 tree var = fn_v_ctrs[i]; |
| 688 | |
| 689 if (item) | |
| 690 item->ctr_vars[i] = var; | |
| 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_node::finalize_decl (var); | |
| 699 } | |
| 700 | |
| 701 fn_b_ctrs[i] = fn_n_ctrs[i] = 0; | |
| 702 fn_v_ctrs[i] = NULL_TREE; | |
| 0 | 703 } |
| 704 prg_ctr_mask |= fn_ctr_mask; | |
| 705 fn_ctr_mask = 0; | |
| 706 } | |
| 111 | 707 } |
| 708 | |
| 709 /* Remove coverage file if opened. */ | |
| 710 | |
| 711 void | |
| 712 coverage_remove_note_file (void) | |
| 713 { | |
| 714 if (bbg_file_name) | |
| 715 { | |
| 716 gcov_close (); | |
| 717 unlink (bbg_file_name); | |
| 718 } | |
| 719 } | |
| 720 | |
| 721 /* Build a coverage variable of TYPE for function FN_DECL. If COUNTER | |
| 722 >= 0 it is a counter array, otherwise it is the function structure. */ | |
| 723 | |
| 724 static tree | |
| 725 build_var (tree fn_decl, tree type, int counter) | |
| 726 { | |
| 727 tree var = build_decl (BUILTINS_LOCATION, VAR_DECL, NULL_TREE, type); | |
| 728 const char *fn_name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (fn_decl)); | |
| 729 char *buf; | |
| 730 size_t fn_name_len, len; | |
| 731 | |
| 732 fn_name = targetm.strip_name_encoding (fn_name); | |
| 733 fn_name_len = strlen (fn_name); | |
| 734 buf = XALLOCAVEC (char, fn_name_len + 8 + sizeof (int) * 3); | |
| 735 | |
| 736 if (counter < 0) | |
| 737 strcpy (buf, "__gcov__"); | |
| 738 else | |
| 739 sprintf (buf, "__gcov%u_", counter); | |
| 740 len = strlen (buf); | |
| 741 buf[len - 1] = symbol_table::symbol_suffix_separator (); | |
| 742 memcpy (buf + len, fn_name, fn_name_len + 1); | |
| 743 DECL_NAME (var) = get_identifier (buf); | |
| 744 TREE_STATIC (var) = 1; | |
| 745 TREE_ADDRESSABLE (var) = 1; | |
| 746 DECL_NONALIASED (var) = 1; | |
| 747 SET_DECL_ALIGN (var, TYPE_ALIGN (type)); | |
| 748 | |
| 749 return var; | |
| 0 | 750 } |
| 751 | |
| 752 /* Creates the gcov_fn_info RECORD_TYPE. */ | |
| 753 | |
| 111 | 754 static void |
| 755 build_fn_info_type (tree type, unsigned counters, tree gcov_info_type) | |
| 0 | 756 { |
| 111 | 757 tree ctr_info = lang_hooks.types.make_type (RECORD_TYPE); |
| 0 | 758 tree field, fields; |
| 759 tree array_type; | |
| 760 | |
| 111 | 761 gcc_assert (counters); |
| 762 | |
| 763 /* ctr_info::num */ | |
| 764 field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
| 765 get_gcov_unsigned_t ()); | |
| 766 fields = field; | |
| 767 | |
| 768 /* ctr_info::values */ | |
| 769 field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
| 770 build_pointer_type (get_gcov_type ())); | |
| 771 DECL_CHAIN (field) = fields; | |
| 772 fields = field; | |
| 773 | |
| 774 finish_builtin_struct (ctr_info, "__gcov_ctr_info", fields, NULL_TREE); | |
| 0 | 775 |
| 111 | 776 /* key */ |
| 777 field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
| 778 build_pointer_type (build_qualified_type | |
| 779 (gcov_info_type, TYPE_QUAL_CONST))); | |
| 780 fields = field; | |
| 781 | |
| 782 /* ident */ | |
| 783 field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
| 784 get_gcov_unsigned_t ()); | |
| 785 DECL_CHAIN (field) = fields; | |
| 786 fields = field; | |
| 787 | |
| 788 /* lineno_checksum */ | |
| 789 field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
| 790 get_gcov_unsigned_t ()); | |
|
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|
791 DECL_CHAIN (field) = fields; |
| 0 | 792 fields = field; |
| 793 | |
| 111 | 794 /* cfg checksum */ |
| 795 field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
| 796 get_gcov_unsigned_t ()); | |
| 797 DECL_CHAIN (field) = fields; | |
| 798 fields = field; | |
| 799 | |
| 800 array_type = build_index_type (size_int (counters - 1)); | |
| 801 array_type = build_array_type (ctr_info, array_type); | |
| 0 | 802 |
| 803 /* counters */ | |
| 111 | 804 field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, array_type); |
|
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|
805 DECL_CHAIN (field) = fields; |
| 0 | 806 fields = field; |
| 807 | |
| 808 finish_builtin_struct (type, "__gcov_fn_info", fields, NULL_TREE); | |
| 809 } | |
| 810 | |
| 111 | 811 /* Returns a CONSTRUCTOR for a gcov_fn_info. DATA is |
| 812 the coverage data for the function and TYPE is the gcov_fn_info | |
| 813 RECORD_TYPE. KEY is the object file key. */ | |
| 0 | 814 |
| 815 static tree | |
| 111 | 816 build_fn_info (const struct coverage_data *data, tree type, tree key) |
| 0 | 817 { |
| 818 tree fields = TYPE_FIELDS (type); | |
| 111 | 819 tree ctr_type; |
| 0 | 820 unsigned ix; |
| 111 | 821 vec<constructor_elt, va_gc> *v1 = NULL; |
| 822 vec<constructor_elt, va_gc> *v2 = NULL; | |
| 0 | 823 |
| 111 | 824 /* key */ |
| 825 CONSTRUCTOR_APPEND_ELT (v1, fields, | |
| 826 build1 (ADDR_EXPR, TREE_TYPE (fields), key)); | |
| 827 fields = DECL_CHAIN (fields); | |
| 828 | |
| 0 | 829 /* ident */ |
|
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|
830 CONSTRUCTOR_APPEND_ELT (v1, fields, |
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831 build_int_cstu (get_gcov_unsigned_t (), |
| 111 | 832 data->ident)); |
|
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833 fields = DECL_CHAIN (fields); |
| 0 | 834 |
| 111 | 835 /* lineno_checksum */ |
|
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|
836 CONSTRUCTOR_APPEND_ELT (v1, fields, |
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|
837 build_int_cstu (get_gcov_unsigned_t (), |
| 111 | 838 data->lineno_checksum)); |
| 839 fields = DECL_CHAIN (fields); | |
| 840 | |
| 841 /* cfg_checksum */ | |
| 842 CONSTRUCTOR_APPEND_ELT (v1, fields, | |
| 843 build_int_cstu (get_gcov_unsigned_t (), | |
| 844 data->cfg_checksum)); | |
|
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|
845 fields = DECL_CHAIN (fields); |
| 0 | 846 |
| 847 /* counters */ | |
| 111 | 848 ctr_type = TREE_TYPE (TREE_TYPE (fields)); |
| 0 | 849 for (ix = 0; ix != GCOV_COUNTERS; ix++) |
| 850 if (prg_ctr_mask & (1 << ix)) | |
| 111 | 851 { |
| 852 vec<constructor_elt, va_gc> *ctr = NULL; | |
| 853 tree var = data->ctr_vars[ix]; | |
| 854 unsigned count = 0; | |
| 855 | |
| 856 if (var) | |
| 857 count | |
| 858 = tree_to_shwi (TYPE_MAX_VALUE (TYPE_DOMAIN (TREE_TYPE (var)))) | |
| 859 + 1; | |
| 0 | 860 |
| 111 | 861 CONSTRUCTOR_APPEND_ELT (ctr, TYPE_FIELDS (ctr_type), |
| 862 build_int_cstu (get_gcov_unsigned_t (), | |
| 863 count)); | |
| 864 | |
| 865 if (var) | |
| 866 CONSTRUCTOR_APPEND_ELT (ctr, DECL_CHAIN (TYPE_FIELDS (ctr_type)), | |
| 867 build_fold_addr_expr (var)); | |
| 868 | |
| 869 CONSTRUCTOR_APPEND_ELT (v2, NULL, build_constructor (ctr_type, ctr)); | |
| 870 } | |
| 871 | |
|
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872 CONSTRUCTOR_APPEND_ELT (v1, fields, |
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873 build_constructor (TREE_TYPE (fields), v2)); |
| 0 | 874 |
|
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|
875 return build_constructor (type, v1); |
| 0 | 876 } |
| 877 | |
| 111 | 878 /* Create gcov_info struct. TYPE is the incomplete RECORD_TYPE to be |
| 879 completed, and FN_INFO_PTR_TYPE is a pointer to the function info type. */ | |
| 0 | 880 |
| 111 | 881 static void |
| 882 build_info_type (tree type, tree fn_info_ptr_type) | |
| 0 | 883 { |
| 884 tree field, fields = NULL_TREE; | |
| 111 | 885 tree merge_fn_type; |
| 886 | |
| 887 /* Version ident */ | |
| 888 field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
| 889 get_gcov_unsigned_t ()); | |
| 890 DECL_CHAIN (field) = fields; | |
| 891 fields = field; | |
| 0 | 892 |
| 111 | 893 /* next pointer */ |
| 894 field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
| 895 build_pointer_type (build_qualified_type | |
| 896 (type, TYPE_QUAL_CONST))); | |
| 897 DECL_CHAIN (field) = fields; | |
| 898 fields = field; | |
| 899 | |
| 900 /* stamp */ | |
| 901 field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
| 902 get_gcov_unsigned_t ()); | |
|
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|
903 DECL_CHAIN (field) = fields; |
| 0 | 904 fields = field; |
| 905 | |
| 111 | 906 /* Filename */ |
| 907 field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
| 908 build_pointer_type (build_qualified_type | |
| 909 (char_type_node, TYPE_QUAL_CONST))); | |
|
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|
910 DECL_CHAIN (field) = fields; |
| 0 | 911 fields = field; |
| 912 | |
| 111 | 913 /* merge fn array */ |
| 914 merge_fn_type | |
| 915 = build_function_type_list (void_type_node, | |
| 916 build_pointer_type (get_gcov_type ()), | |
| 917 get_gcov_unsigned_t (), NULL_TREE); | |
| 918 merge_fn_type | |
| 919 = build_array_type (build_pointer_type (merge_fn_type), | |
| 920 build_index_type (size_int (GCOV_COUNTERS - 1))); | |
| 921 field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
| 922 merge_fn_type); | |
| 923 DECL_CHAIN (field) = fields; | |
| 924 fields = field; | |
| 925 | |
| 926 /* n_functions */ | |
| 927 field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
| 928 get_gcov_unsigned_t ()); | |
| 929 DECL_CHAIN (field) = fields; | |
| 930 fields = field; | |
| 931 | |
| 932 /* function_info pointer pointer */ | |
| 933 fn_info_ptr_type = build_pointer_type | |
| 934 (build_qualified_type (fn_info_ptr_type, TYPE_QUAL_CONST)); | |
| 935 field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
| 936 fn_info_ptr_type); | |
|
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|
937 DECL_CHAIN (field) = fields; |
| 0 | 938 fields = field; |
| 939 | |
| 111 | 940 finish_builtin_struct (type, "__gcov_info", fields, NULL_TREE); |
| 0 | 941 } |
| 942 | |
| 111 | 943 /* Returns a CONSTRUCTOR for the gcov_info object. INFO_TYPE is the |
| 944 gcov_info structure type, FN_ARY is the array of pointers to | |
| 945 function info objects. */ | |
| 0 | 946 |
| 947 static tree | |
| 111 | 948 build_info (tree info_type, tree fn_ary) |
| 0 | 949 { |
| 111 | 950 tree info_fields = TYPE_FIELDS (info_type); |
| 951 tree merge_fn_type, n_funcs; | |
| 952 unsigned ix; | |
| 0 | 953 tree filename_string; |
| 954 int da_file_name_len; | |
| 111 | 955 vec<constructor_elt, va_gc> *v1 = NULL; |
| 956 vec<constructor_elt, va_gc> *v2 = NULL; | |
| 0 | 957 |
| 958 /* Version ident */ | |
| 111 | 959 CONSTRUCTOR_APPEND_ELT (v1, info_fields, |
| 960 build_int_cstu (TREE_TYPE (info_fields), | |
| 961 GCOV_VERSION)); | |
| 962 info_fields = DECL_CHAIN (info_fields); | |
| 0 | 963 |
| 964 /* next -- NULL */ | |
| 111 | 965 CONSTRUCTOR_APPEND_ELT (v1, info_fields, null_pointer_node); |
| 966 info_fields = DECL_CHAIN (info_fields); | |
| 967 | |
| 0 | 968 /* stamp */ |
| 111 | 969 CONSTRUCTOR_APPEND_ELT (v1, info_fields, |
| 970 build_int_cstu (TREE_TYPE (info_fields), | |
| 971 bbg_file_stamp)); | |
| 972 info_fields = DECL_CHAIN (info_fields); | |
| 0 | 973 |
| 974 /* Filename */ | |
| 975 da_file_name_len = strlen (da_file_name); | |
| 976 filename_string = build_string (da_file_name_len + 1, da_file_name); | |
| 977 TREE_TYPE (filename_string) = build_array_type | |
| 111 | 978 (char_type_node, build_index_type (size_int (da_file_name_len))); |
| 979 CONSTRUCTOR_APPEND_ELT (v1, info_fields, | |
| 980 build1 (ADDR_EXPR, TREE_TYPE (info_fields), | |
| 981 filename_string)); | |
| 982 info_fields = DECL_CHAIN (info_fields); | |
| 0 | 983 |
| 111 | 984 /* merge fn array -- NULL slots indicate unmeasured counters */ |
| 985 merge_fn_type = TREE_TYPE (TREE_TYPE (info_fields)); | |
| 986 for (ix = 0; ix != GCOV_COUNTERS; ix++) | |
| 987 { | |
| 988 tree ptr = null_pointer_node; | |
| 0 | 989 |
| 111 | 990 if ((1u << ix) & prg_ctr_mask) |
| 991 { | |
| 992 tree merge_fn = build_decl (BUILTINS_LOCATION, | |
| 993 FUNCTION_DECL, | |
| 994 get_identifier (ctr_merge_functions[ix]), | |
| 995 TREE_TYPE (merge_fn_type)); | |
| 996 DECL_EXTERNAL (merge_fn) = 1; | |
| 997 TREE_PUBLIC (merge_fn) = 1; | |
| 998 DECL_ARTIFICIAL (merge_fn) = 1; | |
| 999 TREE_NOTHROW (merge_fn) = 1; | |
| 1000 /* Initialize assembler name so we can stream out. */ | |
| 1001 DECL_ASSEMBLER_NAME (merge_fn); | |
| 1002 ptr = build1 (ADDR_EXPR, merge_fn_type, merge_fn); | |
| 1003 } | |
| 1004 CONSTRUCTOR_APPEND_ELT (v2, NULL, ptr); | |
| 1005 } | |
| 1006 CONSTRUCTOR_APPEND_ELT (v1, info_fields, | |
| 1007 build_constructor (TREE_TYPE (info_fields), v2)); | |
| 1008 info_fields = DECL_CHAIN (info_fields); | |
| 0 | 1009 |
| 111 | 1010 /* n_functions */ |
| 1011 n_funcs = TYPE_MAX_VALUE (TYPE_DOMAIN (TREE_TYPE (fn_ary))); | |
| 1012 n_funcs = fold_build2 (PLUS_EXPR, TREE_TYPE (info_fields), | |
| 1013 n_funcs, size_one_node); | |
| 1014 CONSTRUCTOR_APPEND_ELT (v1, info_fields, n_funcs); | |
| 1015 info_fields = DECL_CHAIN (info_fields); | |
| 0 | 1016 |
| 111 | 1017 /* functions */ |
| 1018 CONSTRUCTOR_APPEND_ELT (v1, info_fields, | |
| 1019 build1 (ADDR_EXPR, TREE_TYPE (info_fields), fn_ary)); | |
| 1020 info_fields = DECL_CHAIN (info_fields); | |
| 0 | 1021 |
| 111 | 1022 gcc_assert (!info_fields); |
| 1023 return build_constructor (info_type, v1); | |
| 0 | 1024 } |
| 1025 | |
| 111 | 1026 /* Generate the constructor function to call __gcov_init. */ |
| 1027 | |
| 1028 static void | |
| 1029 build_init_ctor (tree gcov_info_type) | |
| 1030 { | |
| 1031 tree ctor, stmt, init_fn; | |
| 1032 | |
| 1033 /* Build a decl for __gcov_init. */ | |
| 1034 init_fn = build_pointer_type (gcov_info_type); | |
| 1035 init_fn = build_function_type_list (void_type_node, init_fn, NULL); | |
| 1036 init_fn = build_decl (BUILTINS_LOCATION, FUNCTION_DECL, | |
| 1037 get_identifier ("__gcov_init"), init_fn); | |
| 1038 TREE_PUBLIC (init_fn) = 1; | |
| 1039 DECL_EXTERNAL (init_fn) = 1; | |
| 1040 DECL_ASSEMBLER_NAME (init_fn); | |
| 1041 | |
| 1042 /* Generate a call to __gcov_init(&gcov_info). */ | |
| 1043 ctor = NULL; | |
| 1044 stmt = build_fold_addr_expr (gcov_info_var); | |
| 1045 stmt = build_call_expr (init_fn, 1, stmt); | |
| 1046 append_to_statement_list (stmt, &ctor); | |
| 1047 | |
| 1048 /* Generate a constructor to run it. */ | |
| 1049 int priority = SUPPORTS_INIT_PRIORITY | |
| 1050 ? MAX_RESERVED_INIT_PRIORITY: DEFAULT_INIT_PRIORITY; | |
| 1051 cgraph_build_static_cdtor ('I', ctor, priority); | |
| 1052 } | |
| 1053 | |
| 1054 /* Generate the destructor function to call __gcov_exit. */ | |
| 0 | 1055 |
| 1056 static void | |
| 111 | 1057 build_gcov_exit_decl (void) |
| 0 | 1058 { |
| 111 | 1059 tree init_fn = build_function_type_list (void_type_node, void_type_node, |
| 1060 NULL); | |
| 1061 init_fn = build_decl (BUILTINS_LOCATION, FUNCTION_DECL, | |
| 1062 get_identifier ("__gcov_exit"), init_fn); | |
| 1063 TREE_PUBLIC (init_fn) = 1; | |
| 1064 DECL_EXTERNAL (init_fn) = 1; | |
| 1065 DECL_ASSEMBLER_NAME (init_fn); | |
| 1066 | |
| 1067 /* Generate a call to __gcov_exit (). */ | |
| 1068 tree dtor = NULL; | |
| 1069 tree stmt = build_call_expr (init_fn, 0); | |
| 1070 append_to_statement_list (stmt, &dtor); | |
| 1071 | |
| 1072 /* Generate a destructor to run it. */ | |
| 1073 int priority = SUPPORTS_INIT_PRIORITY | |
| 1074 ? MAX_RESERVED_INIT_PRIORITY: DEFAULT_INIT_PRIORITY; | |
| 1075 | |
| 1076 cgraph_build_static_cdtor ('D', dtor, priority); | |
| 1077 } | |
| 1078 | |
| 1079 /* Create the gcov_info types and object. Generate the constructor | |
| 1080 function to call __gcov_init. Does not generate the initializer | |
| 1081 for the object. Returns TRUE if coverage data is being emitted. */ | |
| 1082 | |
| 1083 static bool | |
| 1084 coverage_obj_init (void) | |
| 1085 { | |
| 1086 tree gcov_info_type; | |
| 1087 unsigned n_counters = 0; | |
| 1088 unsigned ix; | |
| 1089 struct coverage_data *fn; | |
| 1090 struct coverage_data **fn_prev; | |
| 0 | 1091 char name_buf[32]; |
| 1092 | |
| 1093 no_coverage = 1; /* Disable any further coverage. */ | |
| 1094 | |
| 1095 if (!prg_ctr_mask) | |
| 111 | 1096 return false; |
| 1097 | |
| 1098 if (symtab->dump_file) | |
| 1099 fprintf (symtab->dump_file, "Using data file %s\n", da_file_name); | |
| 0 | 1100 |
| 111 | 1101 /* Prune functions. */ |
| 1102 for (fn_prev = &functions_head; (fn = *fn_prev);) | |
| 1103 if (DECL_STRUCT_FUNCTION (fn->fn_decl)) | |
| 1104 fn_prev = &fn->next; | |
| 1105 else | |
| 1106 /* The function is not being emitted, remove from list. */ | |
| 1107 *fn_prev = fn->next; | |
| 1108 | |
| 1109 if (functions_head == NULL) | |
| 1110 return false; | |
| 0 | 1111 |
| 111 | 1112 for (ix = 0; ix != GCOV_COUNTERS; ix++) |
| 1113 if ((1u << ix) & prg_ctr_mask) | |
| 1114 n_counters++; | |
| 1115 | |
| 1116 /* Build the info and fn_info types. These are mutually recursive. */ | |
| 1117 gcov_info_type = lang_hooks.types.make_type (RECORD_TYPE); | |
| 1118 gcov_fn_info_type = lang_hooks.types.make_type (RECORD_TYPE); | |
| 1119 build_fn_info_type (gcov_fn_info_type, n_counters, gcov_info_type); | |
| 1120 gcov_info_type = lang_hooks.types.make_type (RECORD_TYPE); | |
| 1121 gcov_fn_info_ptr_type = build_pointer_type | |
| 1122 (build_qualified_type (gcov_fn_info_type, TYPE_QUAL_CONST)); | |
| 1123 build_info_type (gcov_info_type, gcov_fn_info_ptr_type); | |
| 1124 | |
| 1125 /* Build the gcov info var, this is referred to in its own | |
| 1126 initializer. */ | |
| 1127 gcov_info_var = build_decl (BUILTINS_LOCATION, | |
| 1128 VAR_DECL, NULL_TREE, gcov_info_type); | |
| 1129 TREE_STATIC (gcov_info_var) = 1; | |
| 0 | 1130 ASM_GENERATE_INTERNAL_LABEL (name_buf, "LPBX", 0); |
| 111 | 1131 DECL_NAME (gcov_info_var) = get_identifier (name_buf); |
| 0 | 1132 |
| 111 | 1133 build_init_ctor (gcov_info_type); |
| 1134 build_gcov_exit_decl (); | |
| 1135 | |
| 1136 return true; | |
| 1137 } | |
| 0 | 1138 |
| 111 | 1139 /* Generate the coverage function info for FN and DATA. Append a |
| 1140 pointer to that object to CTOR and return the appended CTOR. */ | |
| 1141 | |
| 1142 static vec<constructor_elt, va_gc> * | |
| 1143 coverage_obj_fn (vec<constructor_elt, va_gc> *ctor, tree fn, | |
| 1144 struct coverage_data const *data) | |
| 1145 { | |
| 1146 tree init = build_fn_info (data, gcov_fn_info_type, gcov_info_var); | |
| 1147 tree var = build_var (fn, gcov_fn_info_type, -1); | |
| 1148 | |
| 1149 DECL_INITIAL (var) = init; | |
| 1150 varpool_node::finalize_decl (var); | |
| 1151 | |
| 1152 CONSTRUCTOR_APPEND_ELT (ctor, NULL, | |
| 1153 build1 (ADDR_EXPR, gcov_fn_info_ptr_type, var)); | |
| 1154 return ctor; | |
| 1155 } | |
| 1156 | |
| 1157 /* Finalize the coverage data. Generates the array of pointers to | |
| 1158 function objects from CTOR. Generate the gcov_info initializer. */ | |
| 0 | 1159 |
| 111 | 1160 static void |
| 1161 coverage_obj_finish (vec<constructor_elt, va_gc> *ctor) | |
| 1162 { | |
| 1163 unsigned n_functions = vec_safe_length (ctor); | |
| 1164 tree fn_info_ary_type = build_array_type | |
| 1165 (build_qualified_type (gcov_fn_info_ptr_type, TYPE_QUAL_CONST), | |
| 1166 build_index_type (size_int (n_functions - 1))); | |
| 1167 tree fn_info_ary = build_decl (BUILTINS_LOCATION, VAR_DECL, NULL_TREE, | |
| 1168 fn_info_ary_type); | |
| 1169 char name_buf[32]; | |
| 0 | 1170 |
| 111 | 1171 TREE_STATIC (fn_info_ary) = 1; |
| 1172 ASM_GENERATE_INTERNAL_LABEL (name_buf, "LPBX", 1); | |
| 1173 DECL_NAME (fn_info_ary) = get_identifier (name_buf); | |
| 1174 DECL_INITIAL (fn_info_ary) = build_constructor (fn_info_ary_type, ctor); | |
| 1175 varpool_node::finalize_decl (fn_info_ary); | |
| 1176 | |
| 1177 DECL_INITIAL (gcov_info_var) | |
| 1178 = build_info (TREE_TYPE (gcov_info_var), fn_info_ary); | |
| 1179 varpool_node::finalize_decl (gcov_info_var); | |
| 0 | 1180 } |
| 111 | 1181 |
| 0 | 1182 /* Perform file-level initialization. Read in data file, generate name |
| 111 | 1183 of notes file. */ |
| 0 | 1184 |
| 1185 void | |
| 1186 coverage_init (const char *filename) | |
| 1187 { | |
| 1188 int len = strlen (filename); | |
| 111 | 1189 int prefix_len = 0; |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1190 |
| 111 | 1191 /* Since coverage_init is invoked very early, before the pass |
| 1192 manager, we need to set up the dumping explicitly. This is | |
| 1193 similar to the handling in finish_optimization_passes. */ | |
| 1194 int profile_pass_num = | |
| 1195 g->get_passes ()->get_pass_profile ()->static_pass_number; | |
| 1196 g->get_dumps ()->dump_start (profile_pass_num, NULL); | |
| 1197 | |
| 131 | 1198 if (!IS_ABSOLUTE_PATH (filename)) |
| 1199 { | |
| 1200 /* When a profile_data_prefix is provided, then mangle full path | |
| 1201 of filename in order to prevent file path clashing. */ | |
| 1202 if (profile_data_prefix) | |
| 1203 { | |
| 1204 #if HAVE_DOS_BASED_FILE_SYSTEM | |
| 1205 const char *separator = "\\"; | |
| 1206 #else | |
| 1207 const char *separator = "/"; | |
| 1208 #endif | |
| 1209 filename = concat (getpwd (), separator, filename, NULL); | |
| 1210 filename = mangle_path (filename); | |
| 1211 len = strlen (filename); | |
| 1212 } | |
| 1213 else | |
| 1214 profile_data_prefix = getpwd (); | |
| 1215 } | |
| 0 | 1216 |
| 111 | 1217 if (profile_data_prefix) |
| 1218 prefix_len = strlen (profile_data_prefix); | |
| 0 | 1219 |
| 1220 /* Name of da file. */ | |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1221 da_file_name = XNEWVEC (char, len + strlen (GCOV_DATA_SUFFIX) |
| 111 | 1222 + prefix_len + 2); |
| 0 | 1223 |
| 1224 if (profile_data_prefix) | |
| 1225 { | |
| 111 | 1226 memcpy (da_file_name, profile_data_prefix, prefix_len); |
| 1227 da_file_name[prefix_len++] = '/'; | |
| 0 | 1228 } |
| 111 | 1229 memcpy (da_file_name + prefix_len, filename, len); |
| 1230 strcpy (da_file_name + prefix_len + len, GCOV_DATA_SUFFIX); | |
| 1231 | |
| 1232 bbg_file_stamp = local_tick; | |
| 1233 | |
| 1234 if (flag_auto_profile) | |
| 1235 read_autofdo_file (); | |
| 1236 else if (flag_branch_probabilities) | |
| 1237 read_counts_file (); | |
| 0 | 1238 |
| 1239 /* Name of bbg file. */ | |
| 111 | 1240 if (flag_test_coverage && !flag_compare_debug) |
| 1241 { | |
| 1242 bbg_file_name = XNEWVEC (char, len + strlen (GCOV_NOTE_SUFFIX) + 1); | |
| 1243 memcpy (bbg_file_name, filename, len); | |
| 1244 strcpy (bbg_file_name + len, GCOV_NOTE_SUFFIX); | |
| 0 | 1245 |
| 111 | 1246 if (!gcov_open (bbg_file_name, -1)) |
| 1247 { | |
| 1248 error ("cannot open %s", bbg_file_name); | |
| 1249 bbg_file_name = NULL; | |
| 1250 } | |
| 1251 else | |
| 1252 { | |
| 1253 gcov_write_unsigned (GCOV_NOTE_MAGIC); | |
| 1254 gcov_write_unsigned (GCOV_VERSION); | |
| 1255 gcov_write_unsigned (bbg_file_stamp); | |
| 131 | 1256 gcov_write_string (getpwd ()); |
| 1257 | |
| 1258 /* Do not support has_unexecuted_blocks for Ada. */ | |
| 1259 gcov_write_unsigned (strcmp (lang_hooks.name, "GNU Ada") != 0); | |
| 111 | 1260 } |
| 1261 } | |
| 1262 | |
| 1263 g->get_dumps ()->dump_finish (profile_pass_num); | |
| 0 | 1264 } |
| 1265 | |
| 111 | 1266 /* Performs file-level cleanup. Close notes file, generate coverage |
| 0 | 1267 variables and constructor. */ |
| 1268 | |
| 1269 void | |
| 1270 coverage_finish (void) | |
| 1271 { | |
| 111 | 1272 if (bbg_file_name && gcov_close ()) |
| 1273 unlink (bbg_file_name); | |
| 1274 | |
| 1275 if (!flag_branch_probabilities && flag_test_coverage | |
| 1276 && (!local_tick || local_tick == (unsigned)-1)) | |
| 1277 /* Only remove the da file, if we're emitting coverage code and | |
| 1278 cannot uniquely stamp it. If we can stamp it, libgcov will DTRT. */ | |
| 1279 unlink (da_file_name); | |
| 0 | 1280 |
| 111 | 1281 if (coverage_obj_init ()) |
| 1282 { | |
| 1283 vec<constructor_elt, va_gc> *fn_ctor = NULL; | |
| 1284 struct coverage_data *fn; | |
| 1285 | |
| 1286 for (fn = functions_head; fn; fn = fn->next) | |
| 1287 fn_ctor = coverage_obj_fn (fn_ctor, fn->fn_decl, fn); | |
| 1288 coverage_obj_finish (fn_ctor); | |
| 0 | 1289 } |
| 111 | 1290 |
| 1291 XDELETEVEC (da_file_name); | |
| 1292 da_file_name = NULL; | |
| 0 | 1293 } |
| 1294 | |
| 1295 #include "gt-coverage.h" |