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44359ced | 1 | /* Read and write coverage files, and associated functionality. |
fbd26352 | 2 | Copyright (C) 1990-2019 Free Software Foundation, Inc. |
44359ced | 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 | |
8c4c00c1 | 12 | Software Foundation; either version 3, or (at your option) any later |
44359ced | 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 | |
8c4c00c1 | 21 | along with GCC; see the file COPYING3. If not see |
22 | <http://www.gnu.org/licenses/>. */ | |
44359ced | 23 | |
24 | ||
25 | #define GCOV_LINKAGE | |
26 | ||
27 | #include "config.h" | |
28 | #include "system.h" | |
29 | #include "coretypes.h" | |
9ef16211 | 30 | #include "backend.h" |
7c29e30e | 31 | #include "target.h" |
44359ced | 32 | #include "rtl.h" |
33 | #include "tree.h" | |
7c29e30e | 34 | #include "tree-pass.h" |
ad7b10a2 | 35 | #include "memmodel.h" |
7c29e30e | 36 | #include "tm_p.h" |
9ed99284 | 37 | #include "stringpool.h" |
7c29e30e | 38 | #include "cgraph.h" |
39 | #include "coverage.h" | |
40 | #include "diagnostic-core.h" | |
7c29e30e | 41 | #include "fold-const.h" |
9ed99284 | 42 | #include "stor-layout.h" |
44359ced | 43 | #include "output.h" |
44359ced | 44 | #include "toplev.h" |
44359ced | 45 | #include "langhooks.h" |
b5530559 | 46 | #include "tree-iterator.h" |
202c2bd9 | 47 | #include "context.h" |
48 | #include "pass_manager.h" | |
21cd990d | 49 | #include "intl.h" |
d9e50003 | 50 | #include "params.h" |
94bed7c3 | 51 | #include "auto-profile.h" |
56621355 | 52 | #include "profile.h" |
44359ced | 53 | |
54 | #include "gcov-io.c" | |
55 | ||
6c56d3c9 | 56 | struct GTY((chain_next ("%h.next"))) coverage_data |
44359ced | 57 | { |
6c56d3c9 | 58 | struct coverage_data *next; /* next function */ |
89a1f620 | 59 | unsigned ident; /* function ident */ |
06306fd3 | 60 | unsigned lineno_checksum; /* function lineno checksum */ |
61 | unsigned cfg_checksum; /* function cfg checksum */ | |
5014df5d | 62 | tree fn_decl; /* the function decl */ |
63 | tree ctr_vars[GCOV_COUNTERS]; /* counter variables. */ | |
44359ced | 64 | }; |
65 | ||
66 | /* Counts information for a function. */ | |
04009ada | 67 | struct counts_entry : pointer_hash <counts_entry> |
44359ced | 68 | { |
69 | /* We hash by */ | |
3f2c2dd8 | 70 | unsigned ident; |
ab6a34f2 | 71 | unsigned ctr; |
89a1f620 | 72 | |
44359ced | 73 | /* Store */ |
06306fd3 | 74 | unsigned lineno_checksum; |
75 | unsigned cfg_checksum; | |
44359ced | 76 | gcov_type *counts; |
bed69f86 | 77 | unsigned n_counts; |
494bbaae | 78 | |
79 | /* hash_table support. */ | |
9969c043 | 80 | static inline hashval_t hash (const counts_entry *); |
81 | static int equal (const counts_entry *, const counts_entry *); | |
82 | static void remove (counts_entry *); | |
04009ada | 83 | }; |
44359ced | 84 | |
6c56d3c9 | 85 | static GTY(()) struct coverage_data *functions_head = 0; |
86 | static struct coverage_data **functions_tail = &functions_head; | |
015af757 | 87 | static unsigned no_coverage = 0; |
44359ced | 88 | |
ab6a34f2 | 89 | /* Cumulative counter information for whole program. */ |
90 | static unsigned prg_ctr_mask; /* Mask of counter types generated. */ | |
44359ced | 91 | |
ab6a34f2 | 92 | /* Counter information for current function. */ |
6473f3f4 | 93 | static unsigned fn_ctr_mask; /* Mask of counters used. */ |
5014df5d | 94 | static GTY(()) tree fn_v_ctrs[GCOV_COUNTERS]; /* counter variables. */ |
015af757 | 95 | static unsigned fn_n_ctrs[GCOV_COUNTERS]; /* Counters allocated. */ |
96 | static unsigned fn_b_ctrs[GCOV_COUNTERS]; /* Allocation base. */ | |
44359ced | 97 | |
6c56d3c9 | 98 | /* Coverage info VAR_DECL and function info type nodes. */ |
99 | static GTY(()) tree gcov_info_var; | |
100 | static GTY(()) tree gcov_fn_info_type; | |
101 | static GTY(()) tree gcov_fn_info_ptr_type; | |
102 | ||
56b17dd7 | 103 | /* Name of the notes (gcno) output file. The "bbg" prefix is for |
104 | historical reasons, when the notes file contained only the | |
105 | basic block graph notes. | |
106 | If this is NULL we're not writing to the notes file. */ | |
44359ced | 107 | static char *bbg_file_name; |
44359ced | 108 | |
56b17dd7 | 109 | /* File stamp for notes file. */ |
267dc7fa | 110 | static unsigned bbg_file_stamp; |
111 | ||
56b17dd7 | 112 | /* Name of the count data (gcda) file. */ |
44359ced | 113 | static char *da_file_name; |
114 | ||
35cb45c4 | 115 | /* The names of merge functions for counters. */ |
e76f6040 | 116 | #define STR(str) #str |
117 | #define DEF_GCOV_COUNTER(COUNTER, NAME, FN_TYPE) STR(__gcov_merge ## FN_TYPE), | |
118 | static const char *const ctr_merge_functions[GCOV_COUNTERS] = { | |
119 | #include "gcov-counter.def" | |
120 | }; | |
121 | #undef DEF_GCOV_COUNTER | |
122 | #undef STR | |
123 | ||
124 | #define DEF_GCOV_COUNTER(COUNTER, NAME, FN_TYPE) NAME, | |
125 | static const char *const ctr_names[GCOV_COUNTERS] = { | |
126 | #include "gcov-counter.def" | |
127 | }; | |
128 | #undef DEF_GCOV_COUNTER | |
35cb45c4 | 129 | |
44359ced | 130 | /* Forward declarations. */ |
89a1f620 | 131 | static void read_counts_file (void); |
5014df5d | 132 | static tree build_var (tree, tree, int); |
133 | static void build_fn_info_type (tree, unsigned, tree); | |
6c56d3c9 | 134 | static void build_info_type (tree, tree); |
135 | static tree build_fn_info (const struct coverage_data *, tree, tree); | |
136 | static tree build_info (tree, tree); | |
137 | static bool coverage_obj_init (void); | |
f1f41a6c | 138 | static vec<constructor_elt, va_gc> *coverage_obj_fn |
139 | (vec<constructor_elt, va_gc> *, tree, struct coverage_data const *); | |
140 | static void coverage_obj_finish (vec<constructor_elt, va_gc> *); | |
b1b07349 | 141 | \f |
142 | /* Return the type node for gcov_type. */ | |
143 | ||
144 | tree | |
145 | get_gcov_type (void) | |
146 | { | |
1a5d4b27 | 147 | scalar_int_mode mode |
148 | = smallest_int_mode_for_size (LONG_LONG_TYPE_SIZE > 32 ? 64 : 32); | |
1b3c3119 | 149 | return lang_hooks.types.type_for_mode (mode, false); |
b1b07349 | 150 | } |
151 | ||
152 | /* Return the type node for gcov_unsigned_t. */ | |
44359ced | 153 | |
b1b07349 | 154 | static tree |
155 | get_gcov_unsigned_t (void) | |
156 | { | |
1a5d4b27 | 157 | scalar_int_mode mode = smallest_int_mode_for_size (32); |
1b3c3119 | 158 | return lang_hooks.types.type_for_mode (mode, true); |
b1b07349 | 159 | } |
44359ced | 160 | \f |
2b15d2ba | 161 | inline hashval_t |
9969c043 | 162 | counts_entry::hash (const counts_entry *entry) |
44359ced | 163 | { |
3f2c2dd8 | 164 | return entry->ident * GCOV_COUNTERS + entry->ctr; |
44359ced | 165 | } |
166 | ||
2b15d2ba | 167 | inline int |
9969c043 | 168 | counts_entry::equal (const counts_entry *entry1, const counts_entry *entry2) |
44359ced | 169 | { |
3f2c2dd8 | 170 | return entry1->ident == entry2->ident && entry1->ctr == entry2->ctr; |
44359ced | 171 | } |
172 | ||
2b15d2ba | 173 | inline void |
9969c043 | 174 | counts_entry::remove (counts_entry *entry) |
44359ced | 175 | { |
44359ced | 176 | free (entry->counts); |
177 | free (entry); | |
178 | } | |
179 | ||
2b15d2ba | 180 | /* Hash table of count data. */ |
c1f445d2 | 181 | static hash_table<counts_entry> *counts_hash; |
2b15d2ba | 182 | |
44359ced | 183 | /* Read in the counts file, if available. */ |
184 | ||
185 | static void | |
89a1f620 | 186 | read_counts_file (void) |
44359ced | 187 | { |
834f169c | 188 | gcov_unsigned_t fn_ident = 0; |
80abd9e4 | 189 | gcov_unsigned_t tag; |
6e4c20c9 | 190 | int is_error = 0; |
06306fd3 | 191 | unsigned lineno_checksum = 0; |
192 | unsigned cfg_checksum = 0; | |
80abd9e4 | 193 | |
44359ced | 194 | if (!gcov_open (da_file_name, 1)) |
195 | return; | |
89a1f620 | 196 | |
b4d48d67 | 197 | if (!gcov_magic (gcov_read_unsigned (), GCOV_DATA_MAGIC)) |
44359ced | 198 | { |
c3ceba8e | 199 | warning (0, "%qs is not a gcov data file", da_file_name); |
44359ced | 200 | gcov_close (); |
201 | return; | |
202 | } | |
b4d48d67 | 203 | else if ((tag = gcov_read_unsigned ()) != GCOV_VERSION) |
44359ced | 204 | { |
9e0943d4 | 205 | char v[4], e[4]; |
206 | ||
207 | GCOV_UNSIGNED2STRING (v, tag); | |
208 | GCOV_UNSIGNED2STRING (e, GCOV_VERSION); | |
89a1f620 | 209 | |
c3ceba8e | 210 | warning (0, "%qs is version %q.*s, expected version %q.*s", |
841b0dee | 211 | da_file_name, 4, v, 4, e); |
44359ced | 212 | gcov_close (); |
213 | return; | |
214 | } | |
89a1f620 | 215 | |
267dc7fa | 216 | /* Read the stamp, used for creating a generation count. */ |
217 | tag = gcov_read_unsigned (); | |
218 | bbg_file_stamp = crc32_unsigned (bbg_file_stamp, tag); | |
48e1416a | 219 | |
c1f445d2 | 220 | counts_hash = new hash_table<counts_entry> (10); |
80abd9e4 | 221 | while ((tag = gcov_read_unsigned ())) |
44359ced | 222 | { |
80abd9e4 | 223 | gcov_unsigned_t length; |
834f169c | 224 | gcov_position_t offset; |
89a1f620 | 225 | |
44359ced | 226 | length = gcov_read_unsigned (); |
227 | offset = gcov_position (); | |
228 | if (tag == GCOV_TAG_FUNCTION) | |
229 | { | |
5014df5d | 230 | if (length) |
44359ced | 231 | { |
5014df5d | 232 | fn_ident = gcov_read_unsigned (); |
233 | lineno_checksum = gcov_read_unsigned (); | |
234 | cfg_checksum = gcov_read_unsigned (); | |
44359ced | 235 | } |
5014df5d | 236 | else |
237 | fn_ident = lineno_checksum = cfg_checksum = 0; | |
44359ced | 238 | } |
56621355 | 239 | else if (tag == GCOV_TAG_OBJECT_SUMMARY) |
44359ced | 240 | { |
56621355 | 241 | profile_info = XCNEW (gcov_summary); |
242 | profile_info->runs = gcov_read_unsigned (); | |
243 | profile_info->sum_max = gcov_read_unsigned (); | |
44359ced | 244 | } |
3f2c2dd8 | 245 | else if (GCOV_TAG_IS_COUNTER (tag) && fn_ident) |
44359ced | 246 | { |
04009ada | 247 | counts_entry **slot, *entry, elt; |
9e0943d4 | 248 | unsigned n_counts = GCOV_TAG_COUNTER_NUM (length); |
44359ced | 249 | unsigned ix; |
250 | ||
3f2c2dd8 | 251 | elt.ident = fn_ident; |
ab6a34f2 | 252 | elt.ctr = GCOV_COUNTER_FOR_TAG (tag); |
44359ced | 253 | |
c1f445d2 | 254 | slot = counts_hash->find_slot (&elt, INSERT); |
44359ced | 255 | entry = *slot; |
256 | if (!entry) | |
257 | { | |
04009ada | 258 | *slot = entry = XCNEW (counts_entry); |
06306fd3 | 259 | entry->ident = fn_ident; |
ab6a34f2 | 260 | entry->ctr = elt.ctr; |
06306fd3 | 261 | entry->lineno_checksum = lineno_checksum; |
262 | entry->cfg_checksum = cfg_checksum; | |
4c36ffe6 | 263 | entry->counts = XCNEWVEC (gcov_type, n_counts); |
bed69f86 | 264 | entry->n_counts = n_counts; |
44359ced | 265 | } |
06306fd3 | 266 | else if (entry->lineno_checksum != lineno_checksum |
267 | || entry->cfg_checksum != cfg_checksum) | |
44359ced | 268 | { |
06306fd3 | 269 | error ("Profile data for function %u is corrupted", fn_ident); |
270 | error ("checksum is (%x,%x) instead of (%x,%x)", | |
271 | entry->lineno_checksum, entry->cfg_checksum, | |
272 | lineno_checksum, cfg_checksum); | |
c1f445d2 | 273 | delete counts_hash; |
274 | counts_hash = NULL; | |
6e4c20c9 | 275 | break; |
276 | } | |
44359ced | 277 | for (ix = 0; ix != n_counts; ix++) |
278 | entry->counts[ix] += gcov_read_counter (); | |
279 | } | |
3ddf7676 | 280 | gcov_sync (offset, length); |
6e4c20c9 | 281 | if ((is_error = gcov_is_error ())) |
421055ca | 282 | { |
1caf9cb4 | 283 | error (is_error < 0 |
284 | ? G_("%qs has overflowed") | |
285 | : G_("%qs is corrupted"), | |
421055ca | 286 | da_file_name); |
c1f445d2 | 287 | delete counts_hash; |
288 | counts_hash = NULL; | |
421055ca | 289 | break; |
290 | } | |
80abd9e4 | 291 | } |
89a1f620 | 292 | |
44359ced | 293 | gcov_close (); |
294 | } | |
295 | ||
296 | /* Returns the counters for a particular tag. */ | |
297 | ||
298 | gcov_type * | |
56621355 | 299 | get_coverage_counts (unsigned counter, unsigned cfg_checksum, |
bed69f86 | 300 | unsigned lineno_checksum, unsigned int n_counts) |
44359ced | 301 | { |
04009ada | 302 | counts_entry *entry, elt; |
44359ced | 303 | |
6473f3f4 | 304 | /* No hash table, no counts. */ |
c1f445d2 | 305 | if (!counts_hash) |
44359ced | 306 | { |
307 | static int warned = 0; | |
308 | ||
c5fdd880 | 309 | if (!warned++) |
c309657f | 310 | { |
c5fdd880 | 311 | warning (OPT_Wmissing_profile, |
312 | "%qs profile count data file not found", | |
313 | da_file_name); | |
314 | if (dump_enabled_p ()) | |
315 | { | |
316 | dump_user_location_t loc | |
317 | = dump_user_location_t::from_location_t (input_location); | |
a333f643 | 318 | dump_printf_loc (MSG_MISSED_OPTIMIZATION, loc, |
298331ea | 319 | "file %s not found, %s\n", da_file_name, |
320 | (flag_guess_branch_prob | |
321 | ? "execution counts estimated" | |
322 | : "execution counts assumed to be zero")); | |
c5fdd880 | 323 | } |
c309657f | 324 | } |
44359ced | 325 | return NULL; |
326 | } | |
d9e50003 | 327 | if (PARAM_VALUE (PARAM_PROFILE_FUNC_INTERNAL_ID)) |
328 | elt.ident = current_function_funcdef_no + 1; | |
329 | else | |
330 | { | |
331 | gcc_assert (coverage_node_map_initialized_p ()); | |
e9780462 | 332 | elt.ident = cgraph_node::get (current_function_decl)->profile_id; |
d9e50003 | 333 | } |
ab6a34f2 | 334 | elt.ctr = counter; |
c1f445d2 | 335 | entry = counts_hash->find (&elt); |
56621355 | 336 | if (!entry) |
c5fdd880 | 337 | { |
338 | if (counter == GCOV_COUNTER_ARCS) | |
339 | warning_at (DECL_SOURCE_LOCATION (current_function_decl), | |
340 | OPT_Wmissing_profile, | |
341 | "profile for function %qD not found in profile data", | |
342 | current_function_decl); | |
343 | /* The function was not emitted, or is weak and not chosen in the | |
344 | final executable. Silently fail, because there's nothing we | |
345 | can do about it. */ | |
346 | return NULL; | |
347 | } | |
5014df5d | 348 | |
bed69f86 | 349 | if (entry->cfg_checksum != cfg_checksum || entry->n_counts != n_counts) |
6e4c20c9 | 350 | { |
c81ed7c1 | 351 | static int warned = 0; |
21cd990d | 352 | bool warning_printed = false; |
c81ed7c1 | 353 | |
bed69f86 | 354 | if (entry->n_counts != n_counts) |
355 | warning_printed = | |
356 | warning_at (DECL_SOURCE_LOCATION (current_function_decl), | |
357 | OPT_Wcoverage_mismatch, | |
358 | "number of counters in profile data for function %qD " | |
359 | "does not match " | |
360 | "its profile data (counter %qs, expected %i and have %i)", | |
361 | current_function_decl, | |
362 | ctr_names[counter], entry->n_counts, n_counts); | |
363 | else | |
364 | warning_printed = | |
365 | warning_at (DECL_SOURCE_LOCATION (current_function_decl), | |
366 | OPT_Wcoverage_mismatch, | |
367 | "the control flow of function %qD does not match " | |
368 | "its profile data (counter %qs)", current_function_decl, | |
369 | ctr_names[counter]); | |
202c2bd9 | 370 | if (warning_printed && dump_enabled_p ()) |
c81ed7c1 | 371 | { |
c309657f | 372 | dump_user_location_t loc |
295b9056 | 373 | = dump_user_location_t::from_function_decl (current_function_decl); |
a333f643 | 374 | dump_printf_loc (MSG_MISSED_OPTIMIZATION, loc, |
202c2bd9 | 375 | "use -Wno-error=coverage-mismatch to tolerate " |
376 | "the mismatch but performance may drop if the " | |
78bb46f5 | 377 | "function is hot\n"); |
21cd990d | 378 | |
852f689e | 379 | if (!seen_error () |
21cd990d | 380 | && !warned++) |
381 | { | |
a333f643 | 382 | dump_printf_loc (MSG_MISSED_OPTIMIZATION, loc, |
78bb46f5 | 383 | "coverage mismatch ignored\n"); |
a333f643 | 384 | dump_printf (MSG_MISSED_OPTIMIZATION, |
78bb46f5 | 385 | flag_guess_branch_prob |
386 | ? G_("execution counts estimated\n") | |
387 | : G_("execution counts assumed to be zero\n")); | |
21cd990d | 388 | if (!flag_guess_branch_prob) |
a333f643 | 389 | dump_printf (MSG_MISSED_OPTIMIZATION, |
78bb46f5 | 390 | "this can result in poorly optimized code\n"); |
21cd990d | 391 | } |
c81ed7c1 | 392 | } |
393 | ||
394 | return NULL; | |
44359ced | 395 | } |
5014df5d | 396 | else if (entry->lineno_checksum != lineno_checksum) |
397 | { | |
1ace3cd9 | 398 | warning_at (DECL_SOURCE_LOCATION (current_function_decl), |
399 | OPT_Wcoverage_mismatch, | |
400 | "source locations for function %qD have changed," | |
401 | " the profile data may be out of date", | |
402 | current_function_decl); | |
5014df5d | 403 | } |
89a1f620 | 404 | |
44359ced | 405 | return entry->counts; |
406 | } | |
ab6a34f2 | 407 | |
7ef5b942 | 408 | /* Allocate NUM counters of type COUNTER. Returns nonzero if the |
015af757 | 409 | allocation succeeded. */ |
ab6a34f2 | 410 | |
015af757 | 411 | int |
412 | coverage_counter_alloc (unsigned counter, unsigned num) | |
ab6a34f2 | 413 | { |
015af757 | 414 | if (no_coverage) |
415 | return 0; | |
89a1f620 | 416 | |
015af757 | 417 | if (!num) |
418 | return 1; | |
89a1f620 | 419 | |
5014df5d | 420 | if (!fn_v_ctrs[counter]) |
ab6a34f2 | 421 | { |
5014df5d | 422 | tree array_type = build_array_type (get_gcov_type (), NULL_TREE); |
423 | ||
424 | fn_v_ctrs[counter] | |
425 | = build_var (current_function_decl, array_type, counter); | |
ab6a34f2 | 426 | } |
5014df5d | 427 | |
015af757 | 428 | fn_b_ctrs[counter] = fn_n_ctrs[counter]; |
429 | fn_n_ctrs[counter] += num; | |
5014df5d | 430 | |
015af757 | 431 | fn_ctr_mask |= 1 << counter; |
432 | return 1; | |
433 | } | |
ab6a34f2 | 434 | |
4ee9c684 | 435 | /* Generate a tree to access COUNTER NO. */ |
436 | ||
437 | tree | |
438 | tree_coverage_counter_ref (unsigned counter, unsigned no) | |
439 | { | |
8aa35772 | 440 | tree gcov_type_node = get_gcov_type (); |
4ee9c684 | 441 | |
cc636d56 | 442 | gcc_assert (no < fn_n_ctrs[counter] - fn_b_ctrs[counter]); |
4ee9c684 | 443 | |
5014df5d | 444 | no += fn_b_ctrs[counter]; |
445 | ||
4ee9c684 | 446 | /* "no" here is an array index, scaled to bytes later. */ |
5014df5d | 447 | return build4 (ARRAY_REF, gcov_type_node, fn_v_ctrs[counter], |
2c46738d | 448 | build_int_cst (integer_type_node, no), NULL, NULL); |
4ee9c684 | 449 | } |
a961cdc2 | 450 | |
451 | /* Generate a tree to access the address of COUNTER NO. */ | |
452 | ||
453 | tree | |
454 | tree_coverage_counter_addr (unsigned counter, unsigned no) | |
455 | { | |
456 | tree gcov_type_node = get_gcov_type (); | |
457 | ||
458 | gcc_assert (no < fn_n_ctrs[counter] - fn_b_ctrs[counter]); | |
5014df5d | 459 | no += fn_b_ctrs[counter]; |
86f2ad37 | 460 | |
a961cdc2 | 461 | /* "no" here is an array index, scaled to bytes later. */ |
462 | return build_fold_addr_expr (build4 (ARRAY_REF, gcov_type_node, | |
5014df5d | 463 | fn_v_ctrs[counter], |
2c46738d | 464 | build_int_cst (integer_type_node, no), |
a961cdc2 | 465 | NULL, NULL)); |
466 | } | |
44359ced | 467 | \f |
06306fd3 | 468 | |
44359ced | 469 | /* Generate a checksum for a string. CHKSUM is the current |
6473f3f4 | 470 | checksum. */ |
44359ced | 471 | |
472 | static unsigned | |
39eca7a3 | 473 | coverage_checksum_string (unsigned chksum, const char *string) |
44359ced | 474 | { |
39eca7a3 | 475 | int i; |
476 | char *dup = NULL; | |
477 | ||
478 | /* Look for everything that looks if it were produced by | |
db85cc4f | 479 | get_file_function_name and zero out the second part |
39eca7a3 | 480 | that may result from flag_random_seed. This is not critical |
481 | as the checksums are used only for sanity checking. */ | |
482 | for (i = 0; string[i]; i++) | |
44359ced | 483 | { |
a8ccb8fe | 484 | int offset = 0; |
485 | if (!strncmp (string + i, "_GLOBAL__N_", 11)) | |
486 | offset = 11; | |
39eca7a3 | 487 | if (!strncmp (string + i, "_GLOBAL__", 9)) |
a8ccb8fe | 488 | offset = 9; |
489 | ||
490 | /* C++ namespaces do have scheme: | |
491 | _GLOBAL__N_<filename>_<wrongmagicnumber>_<magicnumber>functionname | |
492 | since filename might contain extra underscores there seems | |
493 | to be no better chance then walk all possible offsets looking | |
f0b5f617 | 494 | for magicnumber. */ |
a8ccb8fe | 495 | if (offset) |
0146470a | 496 | { |
497 | for (i = i + offset; string[i]; i++) | |
498 | if (string[i]=='_') | |
499 | { | |
500 | int y; | |
501 | ||
502 | for (y = 1; y < 9; y++) | |
503 | if (!(string[i + y] >= '0' && string[i + y] <= '9') | |
504 | && !(string[i + y] >= 'A' && string[i + y] <= 'F')) | |
505 | break; | |
506 | if (y != 9 || string[i + 9] != '_') | |
507 | continue; | |
508 | for (y = 10; y < 18; y++) | |
509 | if (!(string[i + y] >= '0' && string[i + y] <= '9') | |
510 | && !(string[i + y] >= 'A' && string[i + y] <= 'F')) | |
511 | break; | |
512 | if (y != 18) | |
513 | continue; | |
514 | if (!dup) | |
515 | string = dup = xstrdup (string); | |
516 | for (y = 10; y < 18; y++) | |
517 | dup[i + y] = '0'; | |
518 | } | |
519 | break; | |
520 | } | |
44359ced | 521 | } |
39eca7a3 | 522 | |
523 | chksum = crc32_string (chksum, string); | |
dd045aee | 524 | free (dup); |
89a1f620 | 525 | |
44359ced | 526 | return chksum; |
527 | } | |
528 | ||
529 | /* Compute checksum for the current function. We generate a CRC32. */ | |
530 | ||
06306fd3 | 531 | unsigned |
532 | coverage_compute_lineno_checksum (void) | |
44359ced | 533 | { |
2ed8b5d0 | 534 | expanded_location xloc |
535 | = expand_location (DECL_SOURCE_LOCATION (current_function_decl)); | |
536 | unsigned chksum = xloc.line; | |
44359ced | 537 | |
45648efe | 538 | if (xloc.file) |
539 | chksum = coverage_checksum_string (chksum, xloc.file); | |
39eca7a3 | 540 | chksum = coverage_checksum_string |
44359ced | 541 | (chksum, IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (current_function_decl))); |
542 | ||
543 | return chksum; | |
544 | } | |
06306fd3 | 545 | |
fe37be54 | 546 | /* Compute profile ID. This is better to be unique in whole program. */ |
547 | ||
548 | unsigned | |
549 | coverage_compute_profile_id (struct cgraph_node *n) | |
550 | { | |
df565eb6 | 551 | unsigned chksum; |
fe37be54 | 552 | |
df565eb6 | 553 | /* Externally visible symbols have unique name. */ |
64f3d828 | 554 | if (TREE_PUBLIC (n->decl) || DECL_EXTERNAL (n->decl) || n->unique_name) |
df565eb6 | 555 | { |
556 | chksum = coverage_checksum_string | |
557 | (0, IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (n->decl))); | |
558 | } | |
559 | else | |
560 | { | |
561 | expanded_location xloc | |
562 | = expand_location (DECL_SOURCE_LOCATION (n->decl)); | |
d9e50003 | 563 | bool use_name_only = (PARAM_VALUE (PARAM_PROFILE_FUNC_INTERNAL_ID) == 0); |
df565eb6 | 564 | |
d9e50003 | 565 | chksum = (use_name_only ? 0 : xloc.line); |
45648efe | 566 | if (xloc.file) |
567 | chksum = coverage_checksum_string (chksum, xloc.file); | |
df565eb6 | 568 | chksum = coverage_checksum_string |
569 | (chksum, IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (n->decl))); | |
d9e50003 | 570 | if (!use_name_only && first_global_object_name) |
df565eb6 | 571 | chksum = coverage_checksum_string |
572 | (chksum, first_global_object_name); | |
573 | chksum = coverage_checksum_string | |
574 | (chksum, aux_base_name); | |
575 | } | |
fe37be54 | 576 | |
64f3d828 | 577 | /* Non-negative integers are hopefully small enough to fit in all targets. |
578 | Gcov file formats wants non-zero function IDs. */ | |
579 | chksum = chksum & 0x7fffffff; | |
580 | return chksum + (!chksum); | |
fe37be54 | 581 | } |
582 | ||
a06672d4 | 583 | /* Compute cfg checksum for the function FN given as argument. |
06306fd3 | 584 | The checksum is calculated carefully so that |
585 | source code changes that doesn't affect the control flow graph | |
586 | won't change the checksum. | |
587 | This is to make the profile data useable across source code change. | |
588 | The downside of this is that the compiler may use potentially | |
589 | wrong profile data - that the source code change has non-trivial impact | |
590 | on the validity of profile data (e.g. the reversed condition) | |
591 | but the compiler won't detect the change and use the wrong profile data. */ | |
592 | ||
593 | unsigned | |
a06672d4 | 594 | coverage_compute_cfg_checksum (struct function *fn) |
06306fd3 | 595 | { |
596 | basic_block bb; | |
a06672d4 | 597 | unsigned chksum = n_basic_blocks_for_fn (fn); |
06306fd3 | 598 | |
a06672d4 | 599 | FOR_EACH_BB_FN (bb, fn) |
06306fd3 | 600 | { |
601 | edge e; | |
602 | edge_iterator ei; | |
603 | chksum = crc32_byte (chksum, bb->index); | |
604 | FOR_EACH_EDGE (e, ei, bb->succs) | |
605 | { | |
606 | chksum = crc32_byte (chksum, e->dest->index); | |
607 | } | |
608 | } | |
609 | ||
610 | return chksum; | |
611 | } | |
44359ced | 612 | \f |
56b17dd7 | 613 | /* Begin output to the notes file for the current function. |
6c56d3c9 | 614 | Writes the function header. Returns nonzero if data should be output. */ |
44359ced | 615 | |
616 | int | |
6c56d3c9 | 617 | coverage_begin_function (unsigned lineno_checksum, unsigned cfg_checksum) |
44359ced | 618 | { |
6c56d3c9 | 619 | expanded_location xloc; |
620 | unsigned long offset; | |
621 | ||
3e3a0e9c | 622 | /* We don't need to output .gcno file unless we're under -ftest-coverage |
623 | (e.g. -fprofile-arcs/generate/use don't need .gcno to work). */ | |
6c56d3c9 | 624 | if (no_coverage || !bbg_file_name) |
015af757 | 625 | return 0; |
89a1f620 | 626 | |
6c56d3c9 | 627 | xloc = expand_location (DECL_SOURCE_LOCATION (current_function_decl)); |
06306fd3 | 628 | |
6c56d3c9 | 629 | /* Announce function */ |
630 | offset = gcov_write_tag (GCOV_TAG_FUNCTION); | |
d9e50003 | 631 | if (PARAM_VALUE (PARAM_PROFILE_FUNC_INTERNAL_ID)) |
632 | gcov_write_unsigned (current_function_funcdef_no + 1); | |
633 | else | |
634 | { | |
635 | gcc_assert (coverage_node_map_initialized_p ()); | |
636 | gcov_write_unsigned ( | |
637 | cgraph_node::get (current_function_decl)->profile_id); | |
638 | } | |
639 | ||
6c56d3c9 | 640 | gcov_write_unsigned (lineno_checksum); |
641 | gcov_write_unsigned (cfg_checksum); | |
642 | gcov_write_string (IDENTIFIER_POINTER | |
643 | (DECL_ASSEMBLER_NAME (current_function_decl))); | |
9d27748d | 644 | gcov_write_unsigned (DECL_ARTIFICIAL (current_function_decl) |
7de708f8 | 645 | && !DECL_FUNCTION_VERSIONED (current_function_decl) |
92e4277c | 646 | && !DECL_LAMBDA_FUNCTION_P (current_function_decl)); |
9bdf2425 | 647 | gcov_write_filename (xloc.file); |
6c56d3c9 | 648 | gcov_write_unsigned (xloc.line); |
a82502dd | 649 | gcov_write_unsigned (xloc.column); |
650 | ||
651 | expanded_location endloc = expand_location (cfun->function_end_locus); | |
652 | ||
653 | /* Function can start in a single file and end in another one. */ | |
7aaa2cc6 | 654 | int end_line = endloc.file == xloc.file ? endloc.line : xloc.line; |
4e9fa49b | 655 | int end_column = endloc.file == xloc.file ? endloc.column: xloc.column; |
7aaa2cc6 | 656 | gcc_assert (xloc.line <= end_line); |
657 | gcov_write_unsigned (end_line); | |
4e9fa49b | 658 | gcov_write_unsigned (end_column); |
6c56d3c9 | 659 | gcov_write_length (offset); |
44359ced | 660 | |
44359ced | 661 | return !gcov_is_error (); |
662 | } | |
663 | ||
664 | /* Finish coverage data for the current function. Verify no output | |
665 | error has occurred. Save function coverage counts. */ | |
666 | ||
667 | void | |
06306fd3 | 668 | coverage_end_function (unsigned lineno_checksum, unsigned cfg_checksum) |
44359ced | 669 | { |
670 | unsigned i; | |
89a1f620 | 671 | |
6c56d3c9 | 672 | if (bbg_file_name && gcov_is_error ()) |
89a1f620 | 673 | { |
c3ceba8e | 674 | warning (0, "error writing %qs", bbg_file_name); |
6c56d3c9 | 675 | unlink (bbg_file_name); |
676 | bbg_file_name = NULL; | |
44359ced | 677 | } |
ab6a34f2 | 678 | |
5b0e70ee | 679 | if (fn_ctr_mask) |
ab6a34f2 | 680 | { |
5b0e70ee | 681 | struct coverage_data *item = 0; |
682 | ||
64f3d828 | 683 | item = ggc_alloc<coverage_data> (); |
d9e50003 | 684 | |
64f3d828 | 685 | if (PARAM_VALUE (PARAM_PROFILE_FUNC_INTERNAL_ID)) |
686 | item->ident = current_function_funcdef_no + 1; | |
687 | else | |
688 | { | |
689 | gcc_assert (coverage_node_map_initialized_p ()); | |
690 | item->ident = cgraph_node::get (cfun->decl)->profile_id; | |
5b0e70ee | 691 | } |
06306fd3 | 692 | |
64f3d828 | 693 | item->lineno_checksum = lineno_checksum; |
694 | item->cfg_checksum = cfg_checksum; | |
695 | ||
696 | item->fn_decl = current_function_decl; | |
697 | item->next = 0; | |
698 | *functions_tail = item; | |
699 | functions_tail = &item->next; | |
700 | ||
ab6a34f2 | 701 | for (i = 0; i != GCOV_COUNTERS; i++) |
702 | { | |
5014df5d | 703 | tree var = fn_v_ctrs[i]; |
5b0e70ee | 704 | |
705 | if (item) | |
706 | item->ctr_vars[i] = var; | |
5014df5d | 707 | if (var) |
708 | { | |
709 | tree array_type = build_index_type (size_int (fn_n_ctrs[i] - 1)); | |
710 | array_type = build_array_type (get_gcov_type (), array_type); | |
711 | TREE_TYPE (var) = array_type; | |
712 | DECL_SIZE (var) = TYPE_SIZE (array_type); | |
713 | DECL_SIZE_UNIT (var) = TYPE_SIZE_UNIT (array_type); | |
97221fd7 | 714 | varpool_node::finalize_decl (var); |
5014df5d | 715 | } |
5b0e70ee | 716 | |
5014df5d | 717 | fn_b_ctrs[i] = fn_n_ctrs[i] = 0; |
718 | fn_v_ctrs[i] = NULL_TREE; | |
ab6a34f2 | 719 | } |
720 | prg_ctr_mask |= fn_ctr_mask; | |
721 | fn_ctr_mask = 0; | |
722 | } | |
44359ced | 723 | } |
724 | ||
cc563837 | 725 | /* Remove coverage file if opened. */ |
726 | ||
727 | void | |
728 | coverage_remove_note_file (void) | |
729 | { | |
730 | if (bbg_file_name) | |
731 | { | |
732 | gcov_close (); | |
733 | unlink (bbg_file_name); | |
734 | } | |
735 | } | |
736 | ||
5014df5d | 737 | /* Build a coverage variable of TYPE for function FN_DECL. If COUNTER |
e3c1d6a7 | 738 | >= 0 it is a counter array, otherwise it is the function structure. */ |
44359ced | 739 | |
44359ced | 740 | static tree |
5014df5d | 741 | build_var (tree fn_decl, tree type, int counter) |
742 | { | |
743 | tree var = build_decl (BUILTINS_LOCATION, VAR_DECL, NULL_TREE, type); | |
8d354582 | 744 | const char *fn_name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (fn_decl)); |
745 | char *buf; | |
746 | size_t fn_name_len, len; | |
747 | ||
748 | fn_name = targetm.strip_name_encoding (fn_name); | |
749 | fn_name_len = strlen (fn_name); | |
750 | buf = XALLOCAVEC (char, fn_name_len + 8 + sizeof (int) * 3); | |
5014df5d | 751 | |
5014df5d | 752 | if (counter < 0) |
8d354582 | 753 | strcpy (buf, "__gcov__"); |
5014df5d | 754 | else |
8d354582 | 755 | sprintf (buf, "__gcov%u_", counter); |
756 | len = strlen (buf); | |
11075c28 | 757 | buf[len - 1] = symbol_table::symbol_suffix_separator (); |
8d354582 | 758 | memcpy (buf + len, fn_name, fn_name_len + 1); |
5014df5d | 759 | DECL_NAME (var) = get_identifier (buf); |
33087d4d | 760 | TREE_STATIC (var) = 1; |
761 | TREE_ADDRESSABLE (var) = 1; | |
e7e44439 | 762 | DECL_NONALIASED (var) = 1; |
5d4b30ea | 763 | SET_DECL_ALIGN (var, TYPE_ALIGN (type)); |
5014df5d | 764 | |
765 | return var; | |
766 | } | |
767 | ||
768 | /* Creates the gcov_fn_info RECORD_TYPE. */ | |
769 | ||
770 | static void | |
771 | build_fn_info_type (tree type, unsigned counters, tree gcov_info_type) | |
44359ced | 772 | { |
5014df5d | 773 | tree ctr_info = lang_hooks.types.make_type (RECORD_TYPE); |
44359ced | 774 | tree field, fields; |
ab6a34f2 | 775 | tree array_type; |
89a1f620 | 776 | |
5014df5d | 777 | gcc_assert (counters); |
778 | ||
779 | /* ctr_info::num */ | |
780 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
781 | get_gcov_unsigned_t ()); | |
782 | fields = field; | |
783 | ||
784 | /* ctr_info::values */ | |
785 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
786 | build_pointer_type (get_gcov_type ())); | |
787 | DECL_CHAIN (field) = fields; | |
788 | fields = field; | |
789 | ||
790 | finish_builtin_struct (ctr_info, "__gcov_ctr_info", fields, NULL_TREE); | |
791 | ||
792 | /* key */ | |
793 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
794 | build_pointer_type (build_qualified_type | |
795 | (gcov_info_type, TYPE_QUAL_CONST))); | |
796 | fields = field; | |
797 | ||
3f2c2dd8 | 798 | /* ident */ |
5014df5d | 799 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, |
800 | get_gcov_unsigned_t ()); | |
801 | DECL_CHAIN (field) = fields; | |
802 | fields = field; | |
803 | ||
06306fd3 | 804 | /* lineno_checksum */ |
5014df5d | 805 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, |
806 | get_gcov_unsigned_t ()); | |
1767a056 | 807 | DECL_CHAIN (field) = fields; |
44359ced | 808 | fields = field; |
809 | ||
06306fd3 | 810 | /* cfg checksum */ |
5014df5d | 811 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, |
812 | get_gcov_unsigned_t ()); | |
06306fd3 | 813 | DECL_CHAIN (field) = fields; |
814 | fields = field; | |
815 | ||
2c46738d | 816 | array_type = build_index_type (size_int (counters - 1)); |
5014df5d | 817 | array_type = build_array_type (ctr_info, array_type); |
89a1f620 | 818 | |
44359ced | 819 | /* counters */ |
5014df5d | 820 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, array_type); |
1767a056 | 821 | DECL_CHAIN (field) = fields; |
44359ced | 822 | fields = field; |
823 | ||
ab6a34f2 | 824 | finish_builtin_struct (type, "__gcov_fn_info", fields, NULL_TREE); |
44359ced | 825 | } |
826 | ||
6c56d3c9 | 827 | /* Returns a CONSTRUCTOR for a gcov_fn_info. DATA is |
828 | the coverage data for the function and TYPE is the gcov_fn_info | |
829 | RECORD_TYPE. KEY is the object file key. */ | |
ab6a34f2 | 830 | |
44359ced | 831 | static tree |
6c56d3c9 | 832 | build_fn_info (const struct coverage_data *data, tree type, tree key) |
44359ced | 833 | { |
ab6a34f2 | 834 | tree fields = TYPE_FIELDS (type); |
5014df5d | 835 | tree ctr_type; |
ab6a34f2 | 836 | unsigned ix; |
f1f41a6c | 837 | vec<constructor_elt, va_gc> *v1 = NULL; |
838 | vec<constructor_elt, va_gc> *v2 = NULL; | |
89a1f620 | 839 | |
5014df5d | 840 | /* key */ |
841 | CONSTRUCTOR_APPEND_ELT (v1, fields, | |
842 | build1 (ADDR_EXPR, TREE_TYPE (fields), key)); | |
843 | fields = DECL_CHAIN (fields); | |
844 | ||
3f2c2dd8 | 845 | /* ident */ |
2100aa42 | 846 | CONSTRUCTOR_APPEND_ELT (v1, fields, |
847 | build_int_cstu (get_gcov_unsigned_t (), | |
6c56d3c9 | 848 | data->ident)); |
1767a056 | 849 | fields = DECL_CHAIN (fields); |
89a1f620 | 850 | |
06306fd3 | 851 | /* lineno_checksum */ |
852 | CONSTRUCTOR_APPEND_ELT (v1, fields, | |
853 | build_int_cstu (get_gcov_unsigned_t (), | |
6c56d3c9 | 854 | data->lineno_checksum)); |
06306fd3 | 855 | fields = DECL_CHAIN (fields); |
856 | ||
857 | /* cfg_checksum */ | |
2100aa42 | 858 | CONSTRUCTOR_APPEND_ELT (v1, fields, |
859 | build_int_cstu (get_gcov_unsigned_t (), | |
6c56d3c9 | 860 | data->cfg_checksum)); |
1767a056 | 861 | fields = DECL_CHAIN (fields); |
89a1f620 | 862 | |
44359ced | 863 | /* counters */ |
5014df5d | 864 | ctr_type = TREE_TYPE (TREE_TYPE (fields)); |
ab6a34f2 | 865 | for (ix = 0; ix != GCOV_COUNTERS; ix++) |
866 | if (prg_ctr_mask & (1 << ix)) | |
5014df5d | 867 | { |
f1f41a6c | 868 | vec<constructor_elt, va_gc> *ctr = NULL; |
6c56d3c9 | 869 | tree var = data->ctr_vars[ix]; |
5014df5d | 870 | unsigned count = 0; |
871 | ||
872 | if (var) | |
873 | count | |
fcb97e84 | 874 | = tree_to_shwi (TYPE_MAX_VALUE (TYPE_DOMAIN (TREE_TYPE (var)))) |
5014df5d | 875 | + 1; |
876 | ||
877 | CONSTRUCTOR_APPEND_ELT (ctr, TYPE_FIELDS (ctr_type), | |
878 | build_int_cstu (get_gcov_unsigned_t (), | |
879 | count)); | |
880 | ||
881 | if (var) | |
882 | CONSTRUCTOR_APPEND_ELT (ctr, DECL_CHAIN (TYPE_FIELDS (ctr_type)), | |
883 | build_fold_addr_expr (var)); | |
884 | ||
885 | CONSTRUCTOR_APPEND_ELT (v2, NULL, build_constructor (ctr_type, ctr)); | |
886 | } | |
887 | ||
2100aa42 | 888 | CONSTRUCTOR_APPEND_ELT (v1, fields, |
889 | build_constructor (TREE_TYPE (fields), v2)); | |
89a1f620 | 890 | |
2100aa42 | 891 | return build_constructor (type, v1); |
44359ced | 892 | } |
893 | ||
6c56d3c9 | 894 | /* Create gcov_info struct. TYPE is the incomplete RECORD_TYPE to be |
895 | completed, and FN_INFO_PTR_TYPE is a pointer to the function info type. */ | |
ab6a34f2 | 896 | |
5014df5d | 897 | static void |
6c56d3c9 | 898 | build_info_type (tree type, tree fn_info_ptr_type) |
44359ced | 899 | { |
ab6a34f2 | 900 | tree field, fields = NULL_TREE; |
6c56d3c9 | 901 | tree merge_fn_type; |
834f169c | 902 | |
5014df5d | 903 | /* Version ident */ |
904 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
905 | get_gcov_unsigned_t ()); | |
1767a056 | 906 | DECL_CHAIN (field) = fields; |
44359ced | 907 | fields = field; |
908 | ||
5014df5d | 909 | /* next pointer */ |
910 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
911 | build_pointer_type (build_qualified_type | |
912 | (type, TYPE_QUAL_CONST))); | |
1767a056 | 913 | DECL_CHAIN (field) = fields; |
44359ced | 914 | fields = field; |
915 | ||
5014df5d | 916 | /* stamp */ |
917 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
918 | get_gcov_unsigned_t ()); | |
1767a056 | 919 | DECL_CHAIN (field) = fields; |
35cb45c4 | 920 | fields = field; |
921 | ||
5014df5d | 922 | /* Filename */ |
923 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
924 | build_pointer_type (build_qualified_type | |
925 | (char_type_node, TYPE_QUAL_CONST))); | |
926 | DECL_CHAIN (field) = fields; | |
927 | fields = field; | |
44359ced | 928 | |
5014df5d | 929 | /* merge fn array */ |
930 | merge_fn_type | |
931 | = build_function_type_list (void_type_node, | |
932 | build_pointer_type (get_gcov_type ()), | |
933 | get_gcov_unsigned_t (), NULL_TREE); | |
934 | merge_fn_type | |
935 | = build_array_type (build_pointer_type (merge_fn_type), | |
936 | build_index_type (size_int (GCOV_COUNTERS - 1))); | |
937 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
938 | merge_fn_type); | |
939 | DECL_CHAIN (field) = fields; | |
940 | fields = field; | |
941 | ||
942 | /* n_functions */ | |
943 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
944 | get_gcov_unsigned_t ()); | |
945 | DECL_CHAIN (field) = fields; | |
946 | fields = field; | |
947 | ||
6c56d3c9 | 948 | /* function_info pointer pointer */ |
949 | fn_info_ptr_type = build_pointer_type | |
950 | (build_qualified_type (fn_info_ptr_type, TYPE_QUAL_CONST)); | |
5014df5d | 951 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, |
6c56d3c9 | 952 | fn_info_ptr_type); |
5014df5d | 953 | DECL_CHAIN (field) = fields; |
954 | fields = field; | |
35cb45c4 | 955 | |
5014df5d | 956 | finish_builtin_struct (type, "__gcov_info", fields, NULL_TREE); |
44359ced | 957 | } |
958 | ||
6c56d3c9 | 959 | /* Returns a CONSTRUCTOR for the gcov_info object. INFO_TYPE is the |
960 | gcov_info structure type, FN_ARY is the array of pointers to | |
961 | function info objects. */ | |
ab6a34f2 | 962 | |
44359ced | 963 | static tree |
6c56d3c9 | 964 | build_info (tree info_type, tree fn_ary) |
44359ced | 965 | { |
5014df5d | 966 | tree info_fields = TYPE_FIELDS (info_type); |
6c56d3c9 | 967 | tree merge_fn_type, n_funcs; |
5014df5d | 968 | unsigned ix; |
ab6a34f2 | 969 | tree filename_string; |
3e3a0e9c | 970 | int da_file_name_len; |
f1f41a6c | 971 | vec<constructor_elt, va_gc> *v1 = NULL; |
972 | vec<constructor_elt, va_gc> *v2 = NULL; | |
89a1f620 | 973 | |
ab6a34f2 | 974 | /* Version ident */ |
5014df5d | 975 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, |
976 | build_int_cstu (TREE_TYPE (info_fields), | |
977 | GCOV_VERSION)); | |
978 | info_fields = DECL_CHAIN (info_fields); | |
89a1f620 | 979 | |
44359ced | 980 | /* next -- NULL */ |
5014df5d | 981 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, null_pointer_node); |
982 | info_fields = DECL_CHAIN (info_fields); | |
983 | ||
42fa384f | 984 | /* stamp */ |
5014df5d | 985 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, |
986 | build_int_cstu (TREE_TYPE (info_fields), | |
267dc7fa | 987 | bbg_file_stamp)); |
5014df5d | 988 | info_fields = DECL_CHAIN (info_fields); |
42fa384f | 989 | |
44359ced | 990 | /* Filename */ |
3e3a0e9c | 991 | da_file_name_len = strlen (da_file_name); |
992 | filename_string = build_string (da_file_name_len + 1, da_file_name); | |
7c446c95 | 993 | TREE_TYPE (filename_string) = build_array_type |
2c46738d | 994 | (char_type_node, build_index_type (size_int (da_file_name_len))); |
5014df5d | 995 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, |
996 | build1 (ADDR_EXPR, TREE_TYPE (info_fields), | |
997 | filename_string)); | |
998 | info_fields = DECL_CHAIN (info_fields); | |
89a1f620 | 999 | |
5014df5d | 1000 | /* merge fn array -- NULL slots indicate unmeasured counters */ |
1001 | merge_fn_type = TREE_TYPE (TREE_TYPE (info_fields)); | |
1002 | for (ix = 0; ix != GCOV_COUNTERS; ix++) | |
44359ced | 1003 | { |
5014df5d | 1004 | tree ptr = null_pointer_node; |
89a1f620 | 1005 | |
5014df5d | 1006 | if ((1u << ix) & prg_ctr_mask) |
1007 | { | |
1008 | tree merge_fn = build_decl (BUILTINS_LOCATION, | |
1009 | FUNCTION_DECL, | |
1010 | get_identifier (ctr_merge_functions[ix]), | |
1011 | TREE_TYPE (merge_fn_type)); | |
1012 | DECL_EXTERNAL (merge_fn) = 1; | |
1013 | TREE_PUBLIC (merge_fn) = 1; | |
1014 | DECL_ARTIFICIAL (merge_fn) = 1; | |
1015 | TREE_NOTHROW (merge_fn) = 1; | |
1016 | /* Initialize assembler name so we can stream out. */ | |
1017 | DECL_ASSEMBLER_NAME (merge_fn); | |
1018 | ptr = build1 (ADDR_EXPR, merge_fn_type, merge_fn); | |
1019 | } | |
1020 | CONSTRUCTOR_APPEND_ELT (v2, NULL, ptr); | |
44359ced | 1021 | } |
5014df5d | 1022 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, |
1023 | build_constructor (TREE_TYPE (info_fields), v2)); | |
1024 | info_fields = DECL_CHAIN (info_fields); | |
1025 | ||
1026 | /* n_functions */ | |
6c56d3c9 | 1027 | n_funcs = TYPE_MAX_VALUE (TYPE_DOMAIN (TREE_TYPE (fn_ary))); |
1028 | n_funcs = fold_build2 (PLUS_EXPR, TREE_TYPE (info_fields), | |
1029 | n_funcs, size_one_node); | |
1030 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, n_funcs); | |
5014df5d | 1031 | info_fields = DECL_CHAIN (info_fields); |
5014df5d | 1032 | |
6c56d3c9 | 1033 | /* functions */ |
5014df5d | 1034 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, |
6c56d3c9 | 1035 | build1 (ADDR_EXPR, TREE_TYPE (info_fields), fn_ary)); |
1036 | info_fields = DECL_CHAIN (info_fields); | |
1037 | ||
1038 | gcc_assert (!info_fields); | |
5014df5d | 1039 | return build_constructor (info_type, v1); |
44359ced | 1040 | } |
1041 | ||
bd13f5e8 | 1042 | /* Generate the constructor function to call __gcov_init. */ |
1043 | ||
1044 | static void | |
1045 | build_init_ctor (tree gcov_info_type) | |
1046 | { | |
1047 | tree ctor, stmt, init_fn; | |
1048 | ||
1049 | /* Build a decl for __gcov_init. */ | |
1050 | init_fn = build_pointer_type (gcov_info_type); | |
1051 | init_fn = build_function_type_list (void_type_node, init_fn, NULL); | |
1052 | init_fn = build_decl (BUILTINS_LOCATION, FUNCTION_DECL, | |
1053 | get_identifier ("__gcov_init"), init_fn); | |
1054 | TREE_PUBLIC (init_fn) = 1; | |
1055 | DECL_EXTERNAL (init_fn) = 1; | |
1056 | DECL_ASSEMBLER_NAME (init_fn); | |
1057 | ||
1058 | /* Generate a call to __gcov_init(&gcov_info). */ | |
1059 | ctor = NULL; | |
1060 | stmt = build_fold_addr_expr (gcov_info_var); | |
1061 | stmt = build_call_expr (init_fn, 1, stmt); | |
1062 | append_to_statement_list (stmt, &ctor); | |
1063 | ||
2d799bac | 1064 | /* Generate a constructor to run it. */ |
1065 | int priority = SUPPORTS_INIT_PRIORITY | |
1066 | ? MAX_RESERVED_INIT_PRIORITY: DEFAULT_INIT_PRIORITY; | |
1067 | cgraph_build_static_cdtor ('I', ctor, priority); | |
db46bcd3 | 1068 | } |
1069 | ||
1070 | /* Generate the destructor function to call __gcov_exit. */ | |
1071 | ||
1072 | static void | |
1073 | build_gcov_exit_decl (void) | |
1074 | { | |
1075 | tree init_fn = build_function_type_list (void_type_node, void_type_node, | |
1076 | NULL); | |
1077 | init_fn = build_decl (BUILTINS_LOCATION, FUNCTION_DECL, | |
1078 | get_identifier ("__gcov_exit"), init_fn); | |
1079 | TREE_PUBLIC (init_fn) = 1; | |
1080 | DECL_EXTERNAL (init_fn) = 1; | |
1081 | DECL_ASSEMBLER_NAME (init_fn); | |
1082 | ||
1083 | /* Generate a call to __gcov_exit (). */ | |
1084 | tree dtor = NULL; | |
1085 | tree stmt = build_call_expr (init_fn, 0); | |
1086 | append_to_statement_list (stmt, &dtor); | |
1087 | ||
2d799bac | 1088 | /* Generate a destructor to run it. */ |
1089 | int priority = SUPPORTS_INIT_PRIORITY | |
1090 | ? MAX_RESERVED_INIT_PRIORITY: DEFAULT_INIT_PRIORITY; | |
1091 | ||
1092 | cgraph_build_static_cdtor ('D', dtor, priority); | |
bd13f5e8 | 1093 | } |
1094 | ||
6c56d3c9 | 1095 | /* Create the gcov_info types and object. Generate the constructor |
1096 | function to call __gcov_init. Does not generate the initializer | |
1097 | for the object. Returns TRUE if coverage data is being emitted. */ | |
44359ced | 1098 | |
6c56d3c9 | 1099 | static bool |
1100 | coverage_obj_init (void) | |
44359ced | 1101 | { |
bd13f5e8 | 1102 | tree gcov_info_type; |
6c56d3c9 | 1103 | unsigned n_counters = 0; |
5014df5d | 1104 | unsigned ix; |
6c56d3c9 | 1105 | struct coverage_data *fn; |
1106 | struct coverage_data **fn_prev; | |
b5530559 | 1107 | char name_buf[32]; |
44359ced | 1108 | |
015af757 | 1109 | no_coverage = 1; /* Disable any further coverage. */ |
89a1f620 | 1110 | |
ab6a34f2 | 1111 | if (!prg_ctr_mask) |
6c56d3c9 | 1112 | return false; |
89a1f620 | 1113 | |
35ee1c66 | 1114 | if (symtab->dump_file) |
1115 | fprintf (symtab->dump_file, "Using data file %s\n", da_file_name); | |
44359ced | 1116 | |
6c56d3c9 | 1117 | /* Prune functions. */ |
5014df5d | 1118 | for (fn_prev = &functions_head; (fn = *fn_prev);) |
1119 | if (DECL_STRUCT_FUNCTION (fn->fn_decl)) | |
6c56d3c9 | 1120 | fn_prev = &fn->next; |
5014df5d | 1121 | else |
1122 | /* The function is not being emitted, remove from list. */ | |
1123 | *fn_prev = fn->next; | |
6c56d3c9 | 1124 | |
f1d3fe3f | 1125 | if (functions_head == NULL) |
1126 | return false; | |
1127 | ||
6c56d3c9 | 1128 | for (ix = 0; ix != GCOV_COUNTERS; ix++) |
1129 | if ((1u << ix) & prg_ctr_mask) | |
1130 | n_counters++; | |
5014df5d | 1131 | |
1132 | /* Build the info and fn_info types. These are mutually recursive. */ | |
1133 | gcov_info_type = lang_hooks.types.make_type (RECORD_TYPE); | |
6c56d3c9 | 1134 | gcov_fn_info_type = lang_hooks.types.make_type (RECORD_TYPE); |
3e301e70 | 1135 | build_fn_info_type (gcov_fn_info_type, n_counters, gcov_info_type); |
1136 | gcov_info_type = lang_hooks.types.make_type (RECORD_TYPE); | |
6c56d3c9 | 1137 | gcov_fn_info_ptr_type = build_pointer_type |
1138 | (build_qualified_type (gcov_fn_info_type, TYPE_QUAL_CONST)); | |
6c56d3c9 | 1139 | build_info_type (gcov_info_type, gcov_fn_info_ptr_type); |
5014df5d | 1140 | |
1141 | /* Build the gcov info var, this is referred to in its own | |
1142 | initializer. */ | |
6c56d3c9 | 1143 | gcov_info_var = build_decl (BUILTINS_LOCATION, |
1144 | VAR_DECL, NULL_TREE, gcov_info_type); | |
1145 | TREE_STATIC (gcov_info_var) = 1; | |
b5530559 | 1146 | ASM_GENERATE_INTERNAL_LABEL (name_buf, "LPBX", 0); |
6c56d3c9 | 1147 | DECL_NAME (gcov_info_var) = get_identifier (name_buf); |
44359ced | 1148 | |
bd13f5e8 | 1149 | build_init_ctor (gcov_info_type); |
db46bcd3 | 1150 | build_gcov_exit_decl (); |
6c56d3c9 | 1151 | |
1152 | return true; | |
44359ced | 1153 | } |
6c56d3c9 | 1154 | |
1155 | /* Generate the coverage function info for FN and DATA. Append a | |
1156 | pointer to that object to CTOR and return the appended CTOR. */ | |
1157 | ||
f1f41a6c | 1158 | static vec<constructor_elt, va_gc> * |
1159 | coverage_obj_fn (vec<constructor_elt, va_gc> *ctor, tree fn, | |
6c56d3c9 | 1160 | struct coverage_data const *data) |
1161 | { | |
1162 | tree init = build_fn_info (data, gcov_fn_info_type, gcov_info_var); | |
1163 | tree var = build_var (fn, gcov_fn_info_type, -1); | |
1164 | ||
1165 | DECL_INITIAL (var) = init; | |
97221fd7 | 1166 | varpool_node::finalize_decl (var); |
6c56d3c9 | 1167 | |
1168 | CONSTRUCTOR_APPEND_ELT (ctor, NULL, | |
1169 | build1 (ADDR_EXPR, gcov_fn_info_ptr_type, var)); | |
1170 | return ctor; | |
1171 | } | |
1172 | ||
1173 | /* Finalize the coverage data. Generates the array of pointers to | |
1174 | function objects from CTOR. Generate the gcov_info initializer. */ | |
1175 | ||
1176 | static void | |
f1f41a6c | 1177 | coverage_obj_finish (vec<constructor_elt, va_gc> *ctor) |
6c56d3c9 | 1178 | { |
f1f41a6c | 1179 | unsigned n_functions = vec_safe_length (ctor); |
6c56d3c9 | 1180 | tree fn_info_ary_type = build_array_type |
1181 | (build_qualified_type (gcov_fn_info_ptr_type, TYPE_QUAL_CONST), | |
1182 | build_index_type (size_int (n_functions - 1))); | |
1183 | tree fn_info_ary = build_decl (BUILTINS_LOCATION, VAR_DECL, NULL_TREE, | |
1184 | fn_info_ary_type); | |
1185 | char name_buf[32]; | |
1186 | ||
1187 | TREE_STATIC (fn_info_ary) = 1; | |
1188 | ASM_GENERATE_INTERNAL_LABEL (name_buf, "LPBX", 1); | |
1189 | DECL_NAME (fn_info_ary) = get_identifier (name_buf); | |
1190 | DECL_INITIAL (fn_info_ary) = build_constructor (fn_info_ary_type, ctor); | |
97221fd7 | 1191 | varpool_node::finalize_decl (fn_info_ary); |
6c56d3c9 | 1192 | |
1193 | DECL_INITIAL (gcov_info_var) | |
1194 | = build_info (TREE_TYPE (gcov_info_var), fn_info_ary); | |
97221fd7 | 1195 | varpool_node::finalize_decl (gcov_info_var); |
6c56d3c9 | 1196 | } |
1197 | ||
44359ced | 1198 | /* Perform file-level initialization. Read in data file, generate name |
56b17dd7 | 1199 | of notes file. */ |
44359ced | 1200 | |
1201 | void | |
89a1f620 | 1202 | coverage_init (const char *filename) |
44359ced | 1203 | { |
1204 | int len = strlen (filename); | |
6c56d3c9 | 1205 | int prefix_len = 0; |
48e1416a | 1206 | |
202c2bd9 | 1207 | /* Since coverage_init is invoked very early, before the pass |
1208 | manager, we need to set up the dumping explicitly. This is | |
1209 | similar to the handling in finish_optimization_passes. */ | |
41142c53 | 1210 | int profile_pass_num = |
1211 | g->get_passes ()->get_pass_profile ()->static_pass_number; | |
1212 | g->get_dumps ()->dump_start (profile_pass_num, NULL); | |
202c2bd9 | 1213 | |
59048041 | 1214 | if (!IS_ABSOLUTE_PATH (filename)) |
1215 | { | |
1216 | /* When a profile_data_prefix is provided, then mangle full path | |
1217 | of filename in order to prevent file path clashing. */ | |
1218 | if (profile_data_prefix) | |
1219 | { | |
1220 | #if HAVE_DOS_BASED_FILE_SYSTEM | |
07b96644 | 1221 | const char *separator = "\\"; |
59048041 | 1222 | #else |
1223 | const char *separator = "/"; | |
1224 | #endif | |
1225 | filename = concat (getpwd (), separator, filename, NULL); | |
1226 | filename = mangle_path (filename); | |
1227 | len = strlen (filename); | |
1228 | } | |
1229 | else | |
1230 | profile_data_prefix = getpwd (); | |
1231 | } | |
3e3a0e9c | 1232 | |
6c56d3c9 | 1233 | if (profile_data_prefix) |
1234 | prefix_len = strlen (profile_data_prefix); | |
44359ced | 1235 | |
3f2c2dd8 | 1236 | /* Name of da file. */ |
48e1416a | 1237 | da_file_name = XNEWVEC (char, len + strlen (GCOV_DATA_SUFFIX) |
6c56d3c9 | 1238 | + prefix_len + 2); |
3e3a0e9c | 1239 | |
1240 | if (profile_data_prefix) | |
1241 | { | |
6c56d3c9 | 1242 | memcpy (da_file_name, profile_data_prefix, prefix_len); |
1243 | da_file_name[prefix_len++] = '/'; | |
3e3a0e9c | 1244 | } |
6c56d3c9 | 1245 | memcpy (da_file_name + prefix_len, filename, len); |
1246 | strcpy (da_file_name + prefix_len + len, GCOV_DATA_SUFFIX); | |
89a1f620 | 1247 | |
267dc7fa | 1248 | bbg_file_stamp = local_tick; |
1249 | ||
94bed7c3 | 1250 | if (flag_auto_profile) |
1251 | read_autofdo_file (); | |
1252 | else if (flag_branch_probabilities) | |
267dc7fa | 1253 | read_counts_file (); |
1254 | ||
3f2c2dd8 | 1255 | /* Name of bbg file. */ |
6c56d3c9 | 1256 | if (flag_test_coverage && !flag_compare_debug) |
1257 | { | |
4048b1f0 | 1258 | if (profile_note_location) |
1259 | bbg_file_name = xstrdup (profile_note_location); | |
1260 | else | |
1261 | { | |
1262 | bbg_file_name = XNEWVEC (char, len + strlen (GCOV_NOTE_SUFFIX) + 1); | |
1263 | memcpy (bbg_file_name, filename, len); | |
1264 | strcpy (bbg_file_name + len, GCOV_NOTE_SUFFIX); | |
1265 | } | |
6c56d3c9 | 1266 | |
1267 | if (!gcov_open (bbg_file_name, -1)) | |
1268 | { | |
1269 | error ("cannot open %s", bbg_file_name); | |
1270 | bbg_file_name = NULL; | |
1271 | } | |
1272 | else | |
1273 | { | |
1274 | gcov_write_unsigned (GCOV_NOTE_MAGIC); | |
1275 | gcov_write_unsigned (GCOV_VERSION); | |
267dc7fa | 1276 | gcov_write_unsigned (bbg_file_stamp); |
47e77da0 | 1277 | gcov_write_string (getpwd ()); |
fa6f8ae7 | 1278 | |
1279 | /* Do not support has_unexecuted_blocks for Ada. */ | |
1280 | gcov_write_unsigned (strcmp (lang_hooks.name, "GNU Ada") != 0); | |
6c56d3c9 | 1281 | } |
1282 | } | |
202c2bd9 | 1283 | |
41142c53 | 1284 | g->get_dumps ()->dump_finish (profile_pass_num); |
44359ced | 1285 | } |
1286 | ||
56b17dd7 | 1287 | /* Performs file-level cleanup. Close notes file, generate coverage |
44359ced | 1288 | variables and constructor. */ |
1289 | ||
1290 | void | |
89a1f620 | 1291 | coverage_finish (void) |
44359ced | 1292 | { |
6c56d3c9 | 1293 | if (bbg_file_name && gcov_close ()) |
1294 | unlink (bbg_file_name); | |
267dc7fa | 1295 | |
1296 | if (!flag_branch_probabilities && flag_test_coverage | |
1297 | && (!local_tick || local_tick == (unsigned)-1)) | |
1298 | /* Only remove the da file, if we're emitting coverage code and | |
1299 | cannot uniquely stamp it. If we can stamp it, libgcov will DTRT. */ | |
6c56d3c9 | 1300 | unlink (da_file_name); |
1301 | ||
1302 | if (coverage_obj_init ()) | |
44359ced | 1303 | { |
f1f41a6c | 1304 | vec<constructor_elt, va_gc> *fn_ctor = NULL; |
6c56d3c9 | 1305 | struct coverage_data *fn; |
1306 | ||
1307 | for (fn = functions_head; fn; fn = fn->next) | |
1308 | fn_ctor = coverage_obj_fn (fn_ctor, fn->fn_decl, fn); | |
1309 | coverage_obj_finish (fn_ctor); | |
44359ced | 1310 | } |
073ce4ec | 1311 | |
1312 | XDELETEVEC (da_file_name); | |
1313 | da_file_name = NULL; | |
44359ced | 1314 | } |
1315 | ||
44359ced | 1316 | #include "gt-coverage.h" |