1 | /* Read and write coverage files, and associated functionality. |
2 | Copyright (C) 1990-2023 Free Software Foundation, Inc. |
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" |
30 | #include "backend.h" |
31 | #include "target.h" |
32 | #include "rtl.h" |
33 | #include "tree.h" |
34 | #include "tree-pass.h" |
35 | #include "memmodel.h" |
36 | #include "tm_p.h" |
37 | #include "stringpool.h" |
38 | #include "cgraph.h" |
39 | #include "coverage.h" |
40 | #include "diagnostic-core.h" |
41 | #include "fold-const.h" |
42 | #include "stor-layout.h" |
43 | #include "output.h" |
44 | #include "toplev.h" |
45 | #include "langhooks.h" |
46 | #include "tree-iterator.h" |
47 | #include "context.h" |
48 | #include "pass_manager.h" |
49 | #include "intl.h" |
50 | #include "auto-profile.h" |
51 | #include "profile.h" |
52 | #include "diagnostic.h" |
53 | #include "varasm.h" |
54 | #include "file-prefix-map.h" |
55 | |
56 | #include "gcov-io.cc" |
57 | |
58 | struct GTY((chain_next ("%h.next" ))) coverage_data |
59 | { |
60 | struct coverage_data *next; /* next function */ |
61 | unsigned ident; /* function ident */ |
62 | unsigned lineno_checksum; /* function lineno checksum */ |
63 | unsigned cfg_checksum; /* function cfg checksum */ |
64 | tree fn_decl; /* the function decl */ |
65 | tree ctr_vars[GCOV_COUNTERS]; /* counter variables. */ |
66 | }; |
67 | |
68 | /* Counts information for a function. */ |
69 | struct counts_entry : pointer_hash <counts_entry> |
70 | { |
71 | /* We hash by */ |
72 | unsigned ident; |
73 | unsigned ctr; |
74 | |
75 | /* Store */ |
76 | unsigned lineno_checksum; |
77 | unsigned cfg_checksum; |
78 | gcov_type *counts; |
79 | unsigned n_counts; |
80 | |
81 | /* hash_table support. */ |
82 | static inline hashval_t hash (const counts_entry *); |
83 | static int equal (const counts_entry *, const counts_entry *); |
84 | static void remove (counts_entry *); |
85 | }; |
86 | |
87 | static GTY(()) struct coverage_data *functions_head = 0; |
88 | static struct coverage_data **functions_tail = &functions_head; |
89 | static unsigned no_coverage = 0; |
90 | |
91 | /* Cumulative counter information for whole program. */ |
92 | static unsigned prg_ctr_mask; /* Mask of counter types generated. */ |
93 | |
94 | /* Counter information for current function. */ |
95 | static unsigned fn_ctr_mask; /* Mask of counters used. */ |
96 | static GTY(()) tree fn_v_ctrs[GCOV_COUNTERS]; /* counter variables. */ |
97 | static unsigned fn_n_ctrs[GCOV_COUNTERS]; /* Counters allocated. */ |
98 | static unsigned fn_b_ctrs[GCOV_COUNTERS]; /* Allocation base. */ |
99 | |
100 | /* Coverage info VAR_DECL and function info type nodes. */ |
101 | static GTY(()) tree gcov_info_var; |
102 | static GTY(()) tree gcov_fn_info_type; |
103 | static GTY(()) tree gcov_fn_info_ptr_type; |
104 | |
105 | /* Name of the notes (gcno) output file. The "bbg" prefix is for |
106 | historical reasons, when the notes file contained only the |
107 | basic block graph notes. |
108 | If this is NULL we're not writing to the notes file. */ |
109 | static char *bbg_file_name; |
110 | |
111 | /* File stamp for notes file. */ |
112 | static unsigned bbg_file_stamp; |
113 | |
114 | /* Name of the count data (gcda) file. */ |
115 | static char *da_file_name; |
116 | |
117 | /* The names of merge functions for counters. */ |
118 | #define STR(str) #str |
119 | #define DEF_GCOV_COUNTER(COUNTER, NAME, FN_TYPE) STR(__gcov_merge ## FN_TYPE), |
120 | static const char *const ctr_merge_functions[GCOV_COUNTERS] = { |
121 | #include "gcov-counter.def" |
122 | }; |
123 | #undef DEF_GCOV_COUNTER |
124 | #undef STR |
125 | |
126 | #define DEF_GCOV_COUNTER(COUNTER, NAME, FN_TYPE) NAME, |
127 | static const char *const ctr_names[GCOV_COUNTERS] = { |
128 | #include "gcov-counter.def" |
129 | }; |
130 | #undef DEF_GCOV_COUNTER |
131 | |
132 | /* Forward declarations. */ |
133 | static tree build_var (tree, tree, int); |
134 | |
135 | /* Return the type node for gcov_type. */ |
136 | |
137 | tree |
138 | get_gcov_type (void) |
139 | { |
140 | scalar_int_mode mode |
141 | = smallest_int_mode_for_size (size: targetm.gcov_type_size ()); |
142 | return lang_hooks.types.type_for_mode (mode, false); |
143 | } |
144 | |
145 | /* Return the type node for gcov_unsigned_t. */ |
146 | |
147 | static tree |
148 | get_gcov_unsigned_t (void) |
149 | { |
150 | scalar_int_mode mode = smallest_int_mode_for_size (size: 32); |
151 | return lang_hooks.types.type_for_mode (mode, true); |
152 | } |
153 | |
154 | inline hashval_t |
155 | counts_entry::hash (const counts_entry *entry) |
156 | { |
157 | return entry->ident * GCOV_COUNTERS + entry->ctr; |
158 | } |
159 | |
160 | inline int |
161 | counts_entry::equal (const counts_entry *entry1, const counts_entry *entry2) |
162 | { |
163 | return entry1->ident == entry2->ident && entry1->ctr == entry2->ctr; |
164 | } |
165 | |
166 | inline void |
167 | counts_entry::remove (counts_entry *entry) |
168 | { |
169 | free (ptr: entry->counts); |
170 | free (ptr: entry); |
171 | } |
172 | |
173 | /* Hash table of count data. */ |
174 | static hash_table<counts_entry> *counts_hash; |
175 | |
176 | /* Read in the counts file, if available. */ |
177 | |
178 | static void |
179 | read_counts_file (void) |
180 | { |
181 | gcov_unsigned_t fn_ident = 0; |
182 | gcov_unsigned_t tag; |
183 | int is_error = 0; |
184 | unsigned lineno_checksum = 0; |
185 | unsigned cfg_checksum = 0; |
186 | |
187 | if (!gcov_open (name: da_file_name, mode: 1)) |
188 | return; |
189 | |
190 | if (!gcov_magic (magic: gcov_read_unsigned (), GCOV_DATA_MAGIC)) |
191 | { |
192 | warning (0, "%qs is not a gcov data file" , da_file_name); |
193 | gcov_close (); |
194 | return; |
195 | } |
196 | else if ((tag = gcov_read_unsigned ()) != GCOV_VERSION) |
197 | { |
198 | char v[4], e[4]; |
199 | |
200 | GCOV_UNSIGNED2STRING (v, tag); |
201 | GCOV_UNSIGNED2STRING (e, GCOV_VERSION); |
202 | |
203 | warning (0, "%qs is version %q.*s, expected version %q.*s" , |
204 | da_file_name, 4, v, 4, e); |
205 | gcov_close (); |
206 | return; |
207 | } |
208 | |
209 | /* Read the stamp, used for creating a generation count. */ |
210 | tag = gcov_read_unsigned (); |
211 | bbg_file_stamp = crc32_unsigned (chksum: bbg_file_stamp, value: tag); |
212 | |
213 | /* Read checksum. */ |
214 | gcov_read_unsigned (); |
215 | |
216 | counts_hash = new hash_table<counts_entry> (10); |
217 | while ((tag = gcov_read_unsigned ())) |
218 | { |
219 | gcov_unsigned_t length; |
220 | gcov_position_t offset; |
221 | |
222 | length = gcov_read_unsigned (); |
223 | offset = gcov_position (); |
224 | if (tag == GCOV_TAG_FUNCTION) |
225 | { |
226 | if (length) |
227 | { |
228 | fn_ident = gcov_read_unsigned (); |
229 | lineno_checksum = gcov_read_unsigned (); |
230 | cfg_checksum = gcov_read_unsigned (); |
231 | } |
232 | else |
233 | fn_ident = lineno_checksum = cfg_checksum = 0; |
234 | } |
235 | else if (tag == GCOV_TAG_OBJECT_SUMMARY) |
236 | { |
237 | profile_info = XCNEW (gcov_summary); |
238 | profile_info->runs = gcov_read_unsigned (); |
239 | profile_info->sum_max = gcov_read_unsigned (); |
240 | } |
241 | else if (GCOV_TAG_IS_COUNTER (tag) && fn_ident) |
242 | { |
243 | counts_entry **slot, *entry, elt; |
244 | int read_length = (int)length; |
245 | length = read_length > 0 ? read_length : 0; |
246 | unsigned n_counts = GCOV_TAG_COUNTER_NUM (abs (read_length)); |
247 | unsigned ix; |
248 | |
249 | elt.ident = fn_ident; |
250 | elt.ctr = GCOV_COUNTER_FOR_TAG (tag); |
251 | |
252 | slot = counts_hash->find_slot (value: &elt, insert: INSERT); |
253 | entry = *slot; |
254 | if (!entry) |
255 | { |
256 | *slot = entry = XCNEW (counts_entry); |
257 | entry->ident = fn_ident; |
258 | entry->ctr = elt.ctr; |
259 | entry->lineno_checksum = lineno_checksum; |
260 | entry->cfg_checksum = cfg_checksum; |
261 | entry->counts = XCNEWVEC (gcov_type, n_counts); |
262 | entry->n_counts = n_counts; |
263 | } |
264 | else if (entry->lineno_checksum != lineno_checksum |
265 | || entry->cfg_checksum != cfg_checksum) |
266 | { |
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; |
273 | break; |
274 | } |
275 | if (read_length > 0) |
276 | for (ix = 0; ix != n_counts; ix++) |
277 | entry->counts[ix] = gcov_read_counter (); |
278 | } |
279 | gcov_sync (base: offset, length); |
280 | if ((is_error = gcov_is_error ())) |
281 | { |
282 | error (is_error < 0 |
283 | ? G_("%qs has overflowed" ) |
284 | : G_("%qs is corrupted" ), |
285 | da_file_name); |
286 | delete counts_hash; |
287 | counts_hash = NULL; |
288 | break; |
289 | } |
290 | } |
291 | |
292 | gcov_close (); |
293 | } |
294 | |
295 | /* Returns the counters for a particular tag. */ |
296 | |
297 | gcov_type * |
298 | get_coverage_counts (unsigned counter, unsigned cfg_checksum, |
299 | unsigned lineno_checksum, unsigned int n_counts) |
300 | { |
301 | counts_entry *entry, elt; |
302 | |
303 | /* No hash table, no counts. */ |
304 | if (!counts_hash) |
305 | { |
306 | static int warned = 0; |
307 | |
308 | if (!warned++) |
309 | { |
310 | warning (OPT_Wmissing_profile, |
311 | "%qs profile count data file not found" , |
312 | da_file_name); |
313 | if (dump_enabled_p ()) |
314 | { |
315 | dump_user_location_t loc |
316 | = dump_user_location_t::from_location_t (loc: input_location); |
317 | dump_printf_loc (MSG_MISSED_OPTIMIZATION, loc, |
318 | "file %s not found, %s\n" , da_file_name, |
319 | (flag_guess_branch_prob |
320 | ? "execution counts estimated" |
321 | : "execution counts assumed to be zero" )); |
322 | } |
323 | } |
324 | return NULL; |
325 | } |
326 | if (param_profile_func_internal_id) |
327 | elt.ident = current_function_funcdef_no + 1; |
328 | else |
329 | { |
330 | gcc_assert (coverage_node_map_initialized_p ()); |
331 | elt.ident = cgraph_node::get (decl: current_function_decl)->profile_id; |
332 | } |
333 | elt.ctr = counter; |
334 | entry = counts_hash->find (value: &elt); |
335 | if (!entry) |
336 | { |
337 | if (counter == GCOV_COUNTER_ARCS) |
338 | warning_at (DECL_SOURCE_LOCATION (current_function_decl), |
339 | OPT_Wmissing_profile, |
340 | "profile for function %qD not found in profile data" , |
341 | current_function_decl); |
342 | /* The function was not emitted, or is weak and not chosen in the |
343 | final executable. Silently fail, because there's nothing we |
344 | can do about it. */ |
345 | return NULL; |
346 | } |
347 | |
348 | if (entry->cfg_checksum != cfg_checksum |
349 | || (counter != GCOV_COUNTER_V_INDIR |
350 | && counter != GCOV_COUNTER_V_TOPN |
351 | && entry->n_counts != n_counts)) |
352 | { |
353 | static int warned = 0; |
354 | bool warning_printed = false; |
355 | |
356 | if (entry->n_counts != n_counts) |
357 | warning_printed = |
358 | warning_at (DECL_SOURCE_LOCATION (current_function_decl), |
359 | OPT_Wcoverage_mismatch, |
360 | "number of counters in profile data for function %qD " |
361 | "does not match " |
362 | "its profile data (counter %qs, expected %i and have %i)" , |
363 | current_function_decl, |
364 | ctr_names[counter], entry->n_counts, n_counts); |
365 | else |
366 | warning_printed = |
367 | warning_at (DECL_SOURCE_LOCATION (current_function_decl), |
368 | OPT_Wcoverage_mismatch, |
369 | "the control flow of function %qD does not match " |
370 | "its profile data (counter %qs)" , current_function_decl, |
371 | ctr_names[counter]); |
372 | if (warning_printed && dump_enabled_p ()) |
373 | { |
374 | dump_user_location_t loc |
375 | = dump_user_location_t::from_function_decl (fndecl: current_function_decl); |
376 | dump_printf_loc (MSG_MISSED_OPTIMIZATION, loc, |
377 | "use -Wno-error=coverage-mismatch to tolerate " |
378 | "the mismatch but performance may drop if the " |
379 | "function is hot\n" ); |
380 | |
381 | if (!seen_error () |
382 | && !warned++) |
383 | { |
384 | dump_printf_loc (MSG_MISSED_OPTIMIZATION, loc, |
385 | "coverage mismatch ignored\n" ); |
386 | dump_printf (MSG_MISSED_OPTIMIZATION, |
387 | flag_guess_branch_prob |
388 | ? G_("execution counts estimated\n" ) |
389 | : G_("execution counts assumed to be zero\n" )); |
390 | if (!flag_guess_branch_prob) |
391 | dump_printf (MSG_MISSED_OPTIMIZATION, |
392 | "this can result in poorly optimized code\n" ); |
393 | } |
394 | } |
395 | |
396 | return NULL; |
397 | } |
398 | else if (entry->lineno_checksum != lineno_checksum) |
399 | { |
400 | warning_at (DECL_SOURCE_LOCATION (current_function_decl), |
401 | OPT_Wcoverage_mismatch, |
402 | "source locations for function %qD have changed," |
403 | " the profile data may be out of date" , |
404 | current_function_decl); |
405 | } |
406 | |
407 | return entry->counts; |
408 | } |
409 | |
410 | /* Allocate NUM counters of type COUNTER. Returns nonzero if the |
411 | allocation succeeded. */ |
412 | |
413 | int |
414 | coverage_counter_alloc (unsigned counter, unsigned num) |
415 | { |
416 | if (no_coverage) |
417 | return 0; |
418 | |
419 | if (!num) |
420 | return 1; |
421 | |
422 | if (!fn_v_ctrs[counter]) |
423 | { |
424 | tree array_type = build_array_type (get_gcov_type (), NULL_TREE); |
425 | |
426 | fn_v_ctrs[counter] |
427 | = build_var (current_function_decl, array_type, counter); |
428 | } |
429 | |
430 | fn_b_ctrs[counter] = fn_n_ctrs[counter]; |
431 | fn_n_ctrs[counter] += num; |
432 | |
433 | fn_ctr_mask |= 1 << counter; |
434 | return 1; |
435 | } |
436 | |
437 | /* Generate a tree to access COUNTER NO. */ |
438 | |
439 | tree |
440 | tree_coverage_counter_ref (unsigned counter, unsigned no) |
441 | { |
442 | tree gcov_type_node = get_gcov_type (); |
443 | |
444 | gcc_assert (no < fn_n_ctrs[counter] - fn_b_ctrs[counter]); |
445 | |
446 | no += fn_b_ctrs[counter]; |
447 | |
448 | /* "no" here is an array index, scaled to bytes later. */ |
449 | return build4 (ARRAY_REF, gcov_type_node, fn_v_ctrs[counter], |
450 | build_int_cst (integer_type_node, no), NULL, NULL); |
451 | } |
452 | |
453 | /* Generate a tree to access the address of COUNTER NO. */ |
454 | |
455 | tree |
456 | tree_coverage_counter_addr (unsigned counter, unsigned no) |
457 | { |
458 | tree gcov_type_node = get_gcov_type (); |
459 | |
460 | gcc_assert (no < fn_n_ctrs[counter] - fn_b_ctrs[counter]); |
461 | no += fn_b_ctrs[counter]; |
462 | |
463 | /* "no" here is an array index, scaled to bytes later. */ |
464 | return build_fold_addr_expr (build4 (ARRAY_REF, gcov_type_node, |
465 | fn_v_ctrs[counter], |
466 | build_int_cst (integer_type_node, no), |
467 | NULL, NULL)); |
468 | } |
469 | |
470 | |
471 | /* Generate a checksum for a string. CHKSUM is the current |
472 | checksum. */ |
473 | |
474 | static unsigned |
475 | coverage_checksum_string (unsigned chksum, const char *string) |
476 | { |
477 | int i; |
478 | char *dup = NULL; |
479 | |
480 | /* Look for everything that looks if it were produced by |
481 | get_file_function_name and zero out the second part |
482 | that may result from flag_random_seed. This is not critical |
483 | as the checksums are used only for sanity checking. */ |
484 | for (i = 0; string[i]; i++) |
485 | { |
486 | int offset = 0; |
487 | if (startswith (str: string + i, prefix: "_GLOBAL__N_" )) |
488 | offset = 11; |
489 | if (startswith (str: string + i, prefix: "_GLOBAL__" )) |
490 | offset = 9; |
491 | |
492 | /* C++ namespaces do have scheme: |
493 | _GLOBAL__N_<filename>_<wrongmagicnumber>_<magicnumber>functionname |
494 | since filename might contain extra underscores there seems |
495 | to be no better chance then walk all possible offsets looking |
496 | for magicnumber. */ |
497 | if (offset) |
498 | { |
499 | for (i = i + offset; string[i]; i++) |
500 | if (string[i]=='_') |
501 | { |
502 | int y; |
503 | |
504 | for (y = 1; y < 9; y++) |
505 | if (!(string[i + y] >= '0' && string[i + y] <= '9') |
506 | && !(string[i + y] >= 'A' && string[i + y] <= 'F')) |
507 | break; |
508 | if (y != 9 || string[i + 9] != '_') |
509 | continue; |
510 | for (y = 10; y < 18; y++) |
511 | if (!(string[i + y] >= '0' && string[i + y] <= '9') |
512 | && !(string[i + y] >= 'A' && string[i + y] <= 'F')) |
513 | break; |
514 | if (y != 18) |
515 | continue; |
516 | if (!dup) |
517 | string = dup = xstrdup (string); |
518 | for (y = 10; y < 18; y++) |
519 | dup[i + y] = '0'; |
520 | } |
521 | break; |
522 | } |
523 | } |
524 | |
525 | chksum = crc32_string (chksum, string); |
526 | free (ptr: dup); |
527 | |
528 | return chksum; |
529 | } |
530 | |
531 | /* Compute checksum for the current function. We generate a CRC32. */ |
532 | |
533 | unsigned |
534 | coverage_compute_lineno_checksum (void) |
535 | { |
536 | expanded_location xloc |
537 | = expand_location (DECL_SOURCE_LOCATION (current_function_decl)); |
538 | unsigned chksum = xloc.line; |
539 | |
540 | if (xloc.file) |
541 | chksum = coverage_checksum_string (chksum, string: xloc.file); |
542 | chksum = coverage_checksum_string |
543 | (chksum, IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (current_function_decl))); |
544 | |
545 | return chksum; |
546 | } |
547 | |
548 | /* Compute profile ID. This is better to be unique in whole program. */ |
549 | |
550 | unsigned |
551 | coverage_compute_profile_id (struct cgraph_node *n) |
552 | { |
553 | unsigned chksum; |
554 | |
555 | /* Externally visible symbols have unique name. */ |
556 | if (TREE_PUBLIC (n->decl) || DECL_EXTERNAL (n->decl) || n->unique_name) |
557 | { |
558 | chksum = coverage_checksum_string |
559 | (chksum: 0, IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (n->decl))); |
560 | } |
561 | else |
562 | { |
563 | expanded_location xloc |
564 | = expand_location (DECL_SOURCE_LOCATION (n->decl)); |
565 | bool use_name_only = (param_profile_func_internal_id == 0); |
566 | |
567 | chksum = (use_name_only ? 0 : xloc.line); |
568 | if (xloc.file) |
569 | chksum = coverage_checksum_string (chksum, string: xloc.file); |
570 | chksum = coverage_checksum_string |
571 | (chksum, IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (n->decl))); |
572 | if (!use_name_only && first_global_object_name) |
573 | chksum = coverage_checksum_string |
574 | (chksum, string: first_global_object_name); |
575 | char *base_name = xstrdup (aux_base_name); |
576 | if (endswith (str: base_name, suffix: ".gk" )) |
577 | base_name[strlen (s: base_name) - 3] = '\0'; |
578 | chksum = coverage_checksum_string (chksum, string: base_name); |
579 | free (ptr: base_name); |
580 | } |
581 | |
582 | /* Non-negative integers are hopefully small enough to fit in all targets. |
583 | Gcov file formats wants non-zero function IDs. */ |
584 | chksum = chksum & 0x7fffffff; |
585 | return chksum + (!chksum); |
586 | } |
587 | |
588 | /* Compute cfg checksum for the function FN given as argument. |
589 | The checksum is calculated carefully so that |
590 | source code changes that doesn't affect the control flow graph |
591 | won't change the checksum. |
592 | This is to make the profile data useable across source code change. |
593 | The downside of this is that the compiler may use potentially |
594 | wrong profile data - that the source code change has non-trivial impact |
595 | on the validity of profile data (e.g. the reversed condition) |
596 | but the compiler won't detect the change and use the wrong profile data. */ |
597 | |
598 | unsigned |
599 | coverage_compute_cfg_checksum (struct function *fn) |
600 | { |
601 | basic_block bb; |
602 | unsigned chksum = n_basic_blocks_for_fn (fn); |
603 | |
604 | FOR_EACH_BB_FN (bb, fn) |
605 | { |
606 | edge e; |
607 | edge_iterator ei; |
608 | chksum = crc32_byte (chksum, byte: bb->index); |
609 | FOR_EACH_EDGE (e, ei, bb->succs) |
610 | { |
611 | chksum = crc32_byte (chksum, byte: e->dest->index); |
612 | } |
613 | } |
614 | |
615 | return chksum; |
616 | } |
617 | |
618 | /* Begin output to the notes file for the current function. |
619 | Writes the function header. Returns nonzero if data should be output. */ |
620 | |
621 | int |
622 | coverage_begin_function (unsigned lineno_checksum, unsigned cfg_checksum) |
623 | { |
624 | /* We don't need to output .gcno file unless we're under -ftest-coverage |
625 | (e.g. -fprofile-arcs/generate/use don't need .gcno to work). */ |
626 | if (no_coverage || !bbg_file_name) |
627 | return 0; |
628 | |
629 | expanded_location startloc |
630 | = expand_location (DECL_SOURCE_LOCATION (current_function_decl)); |
631 | |
632 | /* Announce function */ |
633 | unsigned long offset = gcov_write_tag (GCOV_TAG_FUNCTION); |
634 | if (param_profile_func_internal_id) |
635 | gcov_write_unsigned (current_function_funcdef_no + 1); |
636 | else |
637 | { |
638 | gcc_assert (coverage_node_map_initialized_p ()); |
639 | gcov_write_unsigned ( |
640 | value: cgraph_node::get (decl: current_function_decl)->profile_id); |
641 | } |
642 | |
643 | gcov_write_unsigned (value: lineno_checksum); |
644 | gcov_write_unsigned (value: cfg_checksum); |
645 | gcov_write_string (IDENTIFIER_POINTER |
646 | (DECL_ASSEMBLER_NAME (current_function_decl))); |
647 | gcov_write_unsigned (DECL_ARTIFICIAL (current_function_decl) |
648 | && !DECL_FUNCTION_VERSIONED (current_function_decl) |
649 | && !DECL_LAMBDA_FUNCTION_P (current_function_decl)); |
650 | gcov_write_filename (filename: remap_profile_filename (startloc.file)); |
651 | gcov_write_unsigned (value: startloc.line); |
652 | gcov_write_unsigned (value: startloc.column); |
653 | |
654 | expanded_location endloc = expand_location (cfun->function_end_locus); |
655 | |
656 | /* Function can start in a single file and end in another one. */ |
657 | int end_line |
658 | = endloc.file == startloc.file ? endloc.line : startloc.line; |
659 | int end_column |
660 | = endloc.file == startloc.file ? endloc.column: startloc.column; |
661 | |
662 | if (startloc.line > end_line) |
663 | { |
664 | warning_at (DECL_SOURCE_LOCATION (current_function_decl), |
665 | OPT_Wcoverage_invalid_line_number, |
666 | "function starts on a higher line number than it ends" ); |
667 | end_line = startloc.line; |
668 | end_column = startloc.column; |
669 | } |
670 | |
671 | gcov_write_unsigned (value: end_line); |
672 | gcov_write_unsigned (value: end_column); |
673 | gcov_write_length (position: offset); |
674 | |
675 | return !gcov_is_error (); |
676 | } |
677 | |
678 | /* Finish coverage data for the current function. Verify no output |
679 | error has occurred. Save function coverage counts. */ |
680 | |
681 | void |
682 | coverage_end_function (unsigned lineno_checksum, unsigned cfg_checksum) |
683 | { |
684 | unsigned i; |
685 | |
686 | if (bbg_file_name && gcov_is_error ()) |
687 | { |
688 | warning (0, "error writing %qs" , bbg_file_name); |
689 | unlink (name: bbg_file_name); |
690 | bbg_file_name = NULL; |
691 | } |
692 | |
693 | if (fn_ctr_mask) |
694 | { |
695 | struct coverage_data *item = 0; |
696 | |
697 | item = ggc_alloc<coverage_data> (); |
698 | |
699 | if (param_profile_func_internal_id) |
700 | item->ident = current_function_funcdef_no + 1; |
701 | else |
702 | { |
703 | gcc_assert (coverage_node_map_initialized_p ()); |
704 | item->ident = cgraph_node::get (cfun->decl)->profile_id; |
705 | } |
706 | |
707 | item->lineno_checksum = lineno_checksum; |
708 | item->cfg_checksum = cfg_checksum; |
709 | |
710 | item->fn_decl = current_function_decl; |
711 | item->next = 0; |
712 | *functions_tail = item; |
713 | functions_tail = &item->next; |
714 | |
715 | for (i = 0; i != GCOV_COUNTERS; i++) |
716 | { |
717 | tree var = fn_v_ctrs[i]; |
718 | |
719 | if (item) |
720 | item->ctr_vars[i] = var; |
721 | if (var) |
722 | { |
723 | tree array_type = build_index_type (size_int (fn_n_ctrs[i] - 1)); |
724 | array_type = build_array_type (get_gcov_type (), array_type); |
725 | TREE_TYPE (var) = array_type; |
726 | DECL_SIZE (var) = TYPE_SIZE (array_type); |
727 | DECL_SIZE_UNIT (var) = TYPE_SIZE_UNIT (array_type); |
728 | varpool_node::finalize_decl (decl: var); |
729 | } |
730 | |
731 | fn_b_ctrs[i] = fn_n_ctrs[i] = 0; |
732 | fn_v_ctrs[i] = NULL_TREE; |
733 | } |
734 | prg_ctr_mask |= fn_ctr_mask; |
735 | fn_ctr_mask = 0; |
736 | } |
737 | } |
738 | |
739 | /* Remove coverage file if opened. */ |
740 | |
741 | void |
742 | coverage_remove_note_file (void) |
743 | { |
744 | if (bbg_file_name) |
745 | { |
746 | gcov_close (); |
747 | unlink (name: bbg_file_name); |
748 | } |
749 | } |
750 | |
751 | /* Build a coverage variable of TYPE for function FN_DECL. If COUNTER |
752 | >= 0 it is a counter array, otherwise it is the function structure. */ |
753 | |
754 | static tree |
755 | build_var (tree fn_decl, tree type, int counter) |
756 | { |
757 | tree var = build_decl (BUILTINS_LOCATION, VAR_DECL, NULL_TREE, type); |
758 | const char *fn_name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (fn_decl)); |
759 | char *buf; |
760 | size_t fn_name_len, len; |
761 | |
762 | fn_name = targetm.strip_name_encoding (fn_name); |
763 | fn_name_len = strlen (s: fn_name); |
764 | buf = XALLOCAVEC (char, fn_name_len + 8 + sizeof (int) * 3); |
765 | |
766 | if (counter < 0) |
767 | strcpy (dest: buf, src: "__gcov__" ); |
768 | else |
769 | sprintf (s: buf, format: "__gcov%u_" , counter); |
770 | len = strlen (s: buf); |
771 | buf[len - 1] = symbol_table::symbol_suffix_separator (); |
772 | memcpy (dest: buf + len, src: fn_name, n: fn_name_len + 1); |
773 | DECL_NAME (var) = get_identifier (buf); |
774 | TREE_STATIC (var) = 1; |
775 | TREE_ADDRESSABLE (var) = 1; |
776 | DECL_NONALIASED (var) = 1; |
777 | SET_DECL_ALIGN (var, TYPE_ALIGN (type)); |
778 | |
779 | return var; |
780 | } |
781 | |
782 | /* Creates the gcov_fn_info RECORD_TYPE. */ |
783 | |
784 | static void |
785 | build_fn_info_type (tree type, unsigned counters, tree gcov_info_type) |
786 | { |
787 | tree ctr_info = lang_hooks.types.make_type (RECORD_TYPE); |
788 | tree field, fields; |
789 | tree array_type; |
790 | |
791 | gcc_assert (counters); |
792 | |
793 | /* ctr_info::num */ |
794 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, |
795 | get_gcov_unsigned_t ()); |
796 | fields = field; |
797 | |
798 | /* ctr_info::values */ |
799 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, |
800 | build_pointer_type (get_gcov_type ())); |
801 | DECL_CHAIN (field) = fields; |
802 | fields = field; |
803 | |
804 | finish_builtin_struct (ctr_info, "__gcov_ctr_info" , fields, NULL_TREE); |
805 | |
806 | /* key */ |
807 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, |
808 | build_pointer_type (build_qualified_type |
809 | (gcov_info_type, TYPE_QUAL_CONST))); |
810 | fields = field; |
811 | |
812 | /* ident */ |
813 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, |
814 | get_gcov_unsigned_t ()); |
815 | DECL_CHAIN (field) = fields; |
816 | fields = field; |
817 | |
818 | /* lineno_checksum */ |
819 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, |
820 | get_gcov_unsigned_t ()); |
821 | DECL_CHAIN (field) = fields; |
822 | fields = field; |
823 | |
824 | /* cfg checksum */ |
825 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, |
826 | get_gcov_unsigned_t ()); |
827 | DECL_CHAIN (field) = fields; |
828 | fields = field; |
829 | |
830 | array_type = build_index_type (size_int (counters - 1)); |
831 | array_type = build_array_type (ctr_info, array_type); |
832 | |
833 | /* counters */ |
834 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, array_type); |
835 | DECL_CHAIN (field) = fields; |
836 | fields = field; |
837 | |
838 | finish_builtin_struct (type, "__gcov_fn_info" , fields, NULL_TREE); |
839 | } |
840 | |
841 | /* Returns a CONSTRUCTOR for a gcov_fn_info. DATA is |
842 | the coverage data for the function and TYPE is the gcov_fn_info |
843 | RECORD_TYPE. KEY is the object file key. */ |
844 | |
845 | static tree |
846 | build_fn_info (const struct coverage_data *data, tree type, tree key) |
847 | { |
848 | tree fields = TYPE_FIELDS (type); |
849 | tree ctr_type; |
850 | unsigned ix; |
851 | vec<constructor_elt, va_gc> *v1 = NULL; |
852 | vec<constructor_elt, va_gc> *v2 = NULL; |
853 | |
854 | /* key */ |
855 | CONSTRUCTOR_APPEND_ELT (v1, fields, |
856 | build1 (ADDR_EXPR, TREE_TYPE (fields), key)); |
857 | fields = DECL_CHAIN (fields); |
858 | |
859 | /* ident */ |
860 | CONSTRUCTOR_APPEND_ELT (v1, fields, |
861 | build_int_cstu (get_gcov_unsigned_t (), |
862 | data->ident)); |
863 | fields = DECL_CHAIN (fields); |
864 | |
865 | /* lineno_checksum */ |
866 | CONSTRUCTOR_APPEND_ELT (v1, fields, |
867 | build_int_cstu (get_gcov_unsigned_t (), |
868 | data->lineno_checksum)); |
869 | fields = DECL_CHAIN (fields); |
870 | |
871 | /* cfg_checksum */ |
872 | CONSTRUCTOR_APPEND_ELT (v1, fields, |
873 | build_int_cstu (get_gcov_unsigned_t (), |
874 | data->cfg_checksum)); |
875 | fields = DECL_CHAIN (fields); |
876 | |
877 | /* counters */ |
878 | ctr_type = TREE_TYPE (TREE_TYPE (fields)); |
879 | for (ix = 0; ix != GCOV_COUNTERS; ix++) |
880 | if (prg_ctr_mask & (1 << ix)) |
881 | { |
882 | vec<constructor_elt, va_gc> *ctr = NULL; |
883 | tree var = data->ctr_vars[ix]; |
884 | unsigned count = 0; |
885 | |
886 | if (var) |
887 | count |
888 | = tree_to_shwi (TYPE_MAX_VALUE (TYPE_DOMAIN (TREE_TYPE (var)))) |
889 | + 1; |
890 | |
891 | CONSTRUCTOR_APPEND_ELT (ctr, TYPE_FIELDS (ctr_type), |
892 | build_int_cstu (get_gcov_unsigned_t (), |
893 | count)); |
894 | |
895 | if (var) |
896 | CONSTRUCTOR_APPEND_ELT (ctr, DECL_CHAIN (TYPE_FIELDS (ctr_type)), |
897 | build_fold_addr_expr (var)); |
898 | |
899 | CONSTRUCTOR_APPEND_ELT (v2, NULL, build_constructor (ctr_type, ctr)); |
900 | } |
901 | |
902 | CONSTRUCTOR_APPEND_ELT (v1, fields, |
903 | build_constructor (TREE_TYPE (fields), v2)); |
904 | |
905 | return build_constructor (type, v1); |
906 | } |
907 | |
908 | /* Create gcov_info struct. TYPE is the incomplete RECORD_TYPE to be |
909 | completed, and FN_INFO_PTR_TYPE is a pointer to the function info type. */ |
910 | |
911 | static void |
912 | build_info_type (tree type, tree fn_info_ptr_type) |
913 | { |
914 | tree field, fields = NULL_TREE; |
915 | tree merge_fn_type; |
916 | |
917 | /* Version ident */ |
918 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, |
919 | get_gcov_unsigned_t ()); |
920 | DECL_CHAIN (field) = fields; |
921 | fields = field; |
922 | |
923 | /* next pointer */ |
924 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, |
925 | build_pointer_type (build_qualified_type |
926 | (type, TYPE_QUAL_CONST))); |
927 | DECL_CHAIN (field) = fields; |
928 | fields = field; |
929 | |
930 | /* stamp */ |
931 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, |
932 | get_gcov_unsigned_t ()); |
933 | DECL_CHAIN (field) = fields; |
934 | fields = field; |
935 | |
936 | /* Checksum. */ |
937 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, |
938 | get_gcov_unsigned_t ()); |
939 | DECL_CHAIN (field) = fields; |
940 | fields = field; |
941 | |
942 | /* Filename */ |
943 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, |
944 | build_pointer_type (build_qualified_type |
945 | (char_type_node, TYPE_QUAL_CONST))); |
946 | DECL_CHAIN (field) = fields; |
947 | fields = field; |
948 | |
949 | /* merge fn array */ |
950 | merge_fn_type |
951 | = build_function_type_list (void_type_node, |
952 | build_pointer_type (get_gcov_type ()), |
953 | get_gcov_unsigned_t (), NULL_TREE); |
954 | merge_fn_type |
955 | = build_array_type (build_pointer_type (merge_fn_type), |
956 | build_index_type (size_int (GCOV_COUNTERS - 1))); |
957 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, |
958 | merge_fn_type); |
959 | DECL_CHAIN (field) = fields; |
960 | fields = field; |
961 | |
962 | /* n_functions */ |
963 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, |
964 | get_gcov_unsigned_t ()); |
965 | DECL_CHAIN (field) = fields; |
966 | fields = field; |
967 | |
968 | /* function_info pointer pointer */ |
969 | fn_info_ptr_type = build_pointer_type |
970 | (build_qualified_type (fn_info_ptr_type, TYPE_QUAL_CONST)); |
971 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, |
972 | fn_info_ptr_type); |
973 | DECL_CHAIN (field) = fields; |
974 | fields = field; |
975 | |
976 | finish_builtin_struct (type, "__gcov_info" , fields, NULL_TREE); |
977 | } |
978 | |
979 | /* Returns a CONSTRUCTOR for the gcov_info object. INFO_TYPE is the |
980 | gcov_info structure type, FN_ARY is the array of pointers to |
981 | function info objects. */ |
982 | |
983 | static tree |
984 | build_info (tree info_type, tree fn_ary, unsigned object_checksum) |
985 | { |
986 | tree info_fields = TYPE_FIELDS (info_type); |
987 | tree merge_fn_type, n_funcs; |
988 | unsigned ix; |
989 | tree filename_string; |
990 | int da_file_name_len; |
991 | vec<constructor_elt, va_gc> *v1 = NULL; |
992 | vec<constructor_elt, va_gc> *v2 = NULL; |
993 | |
994 | /* Version ident */ |
995 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, |
996 | build_int_cstu (TREE_TYPE (info_fields), |
997 | GCOV_VERSION)); |
998 | info_fields = DECL_CHAIN (info_fields); |
999 | |
1000 | /* next -- NULL */ |
1001 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, null_pointer_node); |
1002 | info_fields = DECL_CHAIN (info_fields); |
1003 | |
1004 | /* stamp */ |
1005 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, |
1006 | build_int_cstu (TREE_TYPE (info_fields), |
1007 | bbg_file_stamp)); |
1008 | info_fields = DECL_CHAIN (info_fields); |
1009 | |
1010 | /* Checksum. */ |
1011 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, |
1012 | build_int_cstu (TREE_TYPE (info_fields), |
1013 | object_checksum)); |
1014 | info_fields = DECL_CHAIN (info_fields); |
1015 | |
1016 | /* Filename */ |
1017 | da_file_name_len = strlen (s: da_file_name); |
1018 | filename_string = build_string (da_file_name_len + 1, da_file_name); |
1019 | TREE_TYPE (filename_string) = build_array_type |
1020 | (char_type_node, build_index_type (size_int (da_file_name_len))); |
1021 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, |
1022 | build1 (ADDR_EXPR, TREE_TYPE (info_fields), |
1023 | filename_string)); |
1024 | info_fields = DECL_CHAIN (info_fields); |
1025 | |
1026 | /* merge fn array -- NULL slots indicate unmeasured counters */ |
1027 | merge_fn_type = TREE_TYPE (TREE_TYPE (info_fields)); |
1028 | for (ix = 0; ix != GCOV_COUNTERS; ix++) |
1029 | { |
1030 | tree ptr = null_pointer_node; |
1031 | |
1032 | if ((1u << ix) & prg_ctr_mask) |
1033 | { |
1034 | tree merge_fn = build_decl (BUILTINS_LOCATION, |
1035 | FUNCTION_DECL, |
1036 | get_identifier (ctr_merge_functions[ix]), |
1037 | TREE_TYPE (merge_fn_type)); |
1038 | DECL_EXTERNAL (merge_fn) = 1; |
1039 | TREE_PUBLIC (merge_fn) = 1; |
1040 | DECL_ARTIFICIAL (merge_fn) = 1; |
1041 | TREE_NOTHROW (merge_fn) = 1; |
1042 | /* Initialize assembler name so we can stream out. */ |
1043 | DECL_ASSEMBLER_NAME (merge_fn); |
1044 | ptr = build1 (ADDR_EXPR, merge_fn_type, merge_fn); |
1045 | } |
1046 | CONSTRUCTOR_APPEND_ELT (v2, NULL, ptr); |
1047 | } |
1048 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, |
1049 | build_constructor (TREE_TYPE (info_fields), v2)); |
1050 | info_fields = DECL_CHAIN (info_fields); |
1051 | |
1052 | /* n_functions */ |
1053 | n_funcs = TYPE_MAX_VALUE (TYPE_DOMAIN (TREE_TYPE (fn_ary))); |
1054 | n_funcs = fold_build2 (PLUS_EXPR, TREE_TYPE (info_fields), |
1055 | n_funcs, size_one_node); |
1056 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, n_funcs); |
1057 | info_fields = DECL_CHAIN (info_fields); |
1058 | |
1059 | /* functions */ |
1060 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, |
1061 | build1 (ADDR_EXPR, TREE_TYPE (info_fields), fn_ary)); |
1062 | info_fields = DECL_CHAIN (info_fields); |
1063 | |
1064 | gcc_assert (!info_fields); |
1065 | return build_constructor (info_type, v1); |
1066 | } |
1067 | |
1068 | /* Generate the constructor function to call __gcov_init. */ |
1069 | |
1070 | static void |
1071 | build_init_ctor (tree gcov_info_type) |
1072 | { |
1073 | tree ctor, stmt, init_fn; |
1074 | |
1075 | /* Build a decl for __gcov_init. */ |
1076 | init_fn = build_pointer_type (gcov_info_type); |
1077 | init_fn = build_function_type_list (void_type_node, init_fn, NULL); |
1078 | init_fn = build_decl (BUILTINS_LOCATION, FUNCTION_DECL, |
1079 | get_identifier ("__gcov_init" ), init_fn); |
1080 | TREE_PUBLIC (init_fn) = 1; |
1081 | DECL_EXTERNAL (init_fn) = 1; |
1082 | DECL_ASSEMBLER_NAME (init_fn); |
1083 | |
1084 | /* Generate a call to __gcov_init(&gcov_info). */ |
1085 | ctor = NULL; |
1086 | stmt = build_fold_addr_expr (gcov_info_var); |
1087 | stmt = build_call_expr (init_fn, 1, stmt); |
1088 | append_to_statement_list (stmt, &ctor); |
1089 | |
1090 | /* Generate a constructor to run it. */ |
1091 | int priority = SUPPORTS_INIT_PRIORITY |
1092 | ? MAX_RESERVED_INIT_PRIORITY: DEFAULT_INIT_PRIORITY; |
1093 | cgraph_build_static_cdtor (which: 'I', body: ctor, priority); |
1094 | } |
1095 | |
1096 | /* Generate the destructor function to call __gcov_exit. */ |
1097 | |
1098 | static void |
1099 | build_gcov_exit_decl (void) |
1100 | { |
1101 | tree init_fn = build_function_type_list (void_type_node, NULL); |
1102 | init_fn = build_decl (BUILTINS_LOCATION, FUNCTION_DECL, |
1103 | get_identifier ("__gcov_exit" ), init_fn); |
1104 | TREE_PUBLIC (init_fn) = 1; |
1105 | DECL_EXTERNAL (init_fn) = 1; |
1106 | DECL_ASSEMBLER_NAME (init_fn); |
1107 | |
1108 | /* Generate a call to __gcov_exit (). */ |
1109 | tree dtor = NULL; |
1110 | tree stmt = build_call_expr (init_fn, 0); |
1111 | append_to_statement_list (stmt, &dtor); |
1112 | |
1113 | /* Generate a destructor to run it. */ |
1114 | int priority = SUPPORTS_INIT_PRIORITY |
1115 | ? MAX_RESERVED_INIT_PRIORITY: DEFAULT_INIT_PRIORITY; |
1116 | |
1117 | cgraph_build_static_cdtor (which: 'D', body: dtor, priority); |
1118 | } |
1119 | |
1120 | /* Generate the pointer to the gcov_info_var in a dedicated section. */ |
1121 | |
1122 | static void |
1123 | build_gcov_info_var_registration (tree gcov_info_type) |
1124 | { |
1125 | tree var = build_decl (BUILTINS_LOCATION, |
1126 | VAR_DECL, NULL_TREE, |
1127 | build_pointer_type (gcov_info_type)); |
1128 | TREE_STATIC (var) = 1; |
1129 | TREE_READONLY (var) = 1; |
1130 | char name_buf[32]; |
1131 | ASM_GENERATE_INTERNAL_LABEL (name_buf, "LPBX" , 2); |
1132 | DECL_NAME (var) = get_identifier (name_buf); |
1133 | get_section (profile_info_section, SECTION_UNNAMED, NULL); |
1134 | set_decl_section_name (var, profile_info_section); |
1135 | mark_decl_referenced (var); |
1136 | DECL_INITIAL (var) = build_fold_addr_expr (gcov_info_var); |
1137 | varpool_node::finalize_decl (decl: var); |
1138 | } |
1139 | |
1140 | /* Create the gcov_info types and object. Generate the constructor |
1141 | function to call __gcov_init. Does not generate the initializer |
1142 | for the object. Returns TRUE if coverage data is being emitted. */ |
1143 | |
1144 | static bool |
1145 | coverage_obj_init (void) |
1146 | { |
1147 | tree gcov_info_type; |
1148 | unsigned n_counters = 0; |
1149 | unsigned ix; |
1150 | struct coverage_data *fn; |
1151 | struct coverage_data **fn_prev; |
1152 | char name_buf[32]; |
1153 | |
1154 | no_coverage = 1; /* Disable any further coverage. */ |
1155 | |
1156 | if (!prg_ctr_mask) |
1157 | return false; |
1158 | |
1159 | if (symtab->dump_file) |
1160 | fprintf (stream: symtab->dump_file, format: "Using data file %s\n" , da_file_name); |
1161 | |
1162 | /* Prune functions. */ |
1163 | for (fn_prev = &functions_head; (fn = *fn_prev);) |
1164 | if (DECL_STRUCT_FUNCTION (fn->fn_decl)) |
1165 | fn_prev = &fn->next; |
1166 | else |
1167 | /* The function is not being emitted, remove from list. */ |
1168 | *fn_prev = fn->next; |
1169 | |
1170 | if (functions_head == NULL) |
1171 | return false; |
1172 | |
1173 | for (ix = 0; ix != GCOV_COUNTERS; ix++) |
1174 | if ((1u << ix) & prg_ctr_mask) |
1175 | n_counters++; |
1176 | |
1177 | /* Build the info and fn_info types. These are mutually recursive. */ |
1178 | gcov_info_type = lang_hooks.types.make_type (RECORD_TYPE); |
1179 | gcov_fn_info_type = lang_hooks.types.make_type (RECORD_TYPE); |
1180 | build_fn_info_type (type: gcov_fn_info_type, counters: n_counters, gcov_info_type); |
1181 | gcov_info_type = lang_hooks.types.make_type (RECORD_TYPE); |
1182 | gcov_fn_info_ptr_type = build_pointer_type |
1183 | (build_qualified_type (gcov_fn_info_type, TYPE_QUAL_CONST)); |
1184 | build_info_type (type: gcov_info_type, fn_info_ptr_type: gcov_fn_info_ptr_type); |
1185 | |
1186 | /* Build the gcov info var, this is referred to in its own |
1187 | initializer. */ |
1188 | gcov_info_var = build_decl (BUILTINS_LOCATION, |
1189 | VAR_DECL, NULL_TREE, gcov_info_type); |
1190 | TREE_STATIC (gcov_info_var) = 1; |
1191 | ASM_GENERATE_INTERNAL_LABEL (name_buf, "LPBX" , 0); |
1192 | DECL_NAME (gcov_info_var) = get_identifier (name_buf); |
1193 | |
1194 | if (profile_info_section) |
1195 | build_gcov_info_var_registration (gcov_info_type); |
1196 | else |
1197 | { |
1198 | build_init_ctor (gcov_info_type); |
1199 | build_gcov_exit_decl (); |
1200 | } |
1201 | |
1202 | return true; |
1203 | } |
1204 | |
1205 | /* Generate the coverage function info for FN and DATA. Append a |
1206 | pointer to that object to CTOR and return the appended CTOR. */ |
1207 | |
1208 | static vec<constructor_elt, va_gc> * |
1209 | coverage_obj_fn (vec<constructor_elt, va_gc> *ctor, tree fn, |
1210 | struct coverage_data const *data) |
1211 | { |
1212 | tree init = build_fn_info (data, type: gcov_fn_info_type, key: gcov_info_var); |
1213 | tree var = build_var (fn_decl: fn, type: gcov_fn_info_type, counter: -1); |
1214 | |
1215 | DECL_INITIAL (var) = init; |
1216 | varpool_node::finalize_decl (decl: var); |
1217 | |
1218 | CONSTRUCTOR_APPEND_ELT (ctor, NULL, |
1219 | build1 (ADDR_EXPR, gcov_fn_info_ptr_type, var)); |
1220 | return ctor; |
1221 | } |
1222 | |
1223 | /* Finalize the coverage data. Generates the array of pointers to |
1224 | function objects from CTOR. Generate the gcov_info initializer. */ |
1225 | |
1226 | static void |
1227 | coverage_obj_finish (vec<constructor_elt, va_gc> *ctor, |
1228 | unsigned object_checksum) |
1229 | { |
1230 | unsigned n_functions = vec_safe_length (v: ctor); |
1231 | tree fn_info_ary_type = build_array_type |
1232 | (build_qualified_type (gcov_fn_info_ptr_type, TYPE_QUAL_CONST), |
1233 | build_index_type (size_int (n_functions - 1))); |
1234 | tree fn_info_ary = build_decl (BUILTINS_LOCATION, VAR_DECL, NULL_TREE, |
1235 | fn_info_ary_type); |
1236 | char name_buf[32]; |
1237 | |
1238 | TREE_STATIC (fn_info_ary) = 1; |
1239 | ASM_GENERATE_INTERNAL_LABEL (name_buf, "LPBX" , 1); |
1240 | DECL_NAME (fn_info_ary) = get_identifier (name_buf); |
1241 | DECL_INITIAL (fn_info_ary) = build_constructor (fn_info_ary_type, ctor); |
1242 | varpool_node::finalize_decl (decl: fn_info_ary); |
1243 | |
1244 | DECL_INITIAL (gcov_info_var) |
1245 | = build_info (TREE_TYPE (gcov_info_var), fn_ary: fn_info_ary, object_checksum); |
1246 | varpool_node::finalize_decl (decl: gcov_info_var); |
1247 | } |
1248 | |
1249 | /* Perform file-level initialization. Read in data file, generate name |
1250 | of notes file. */ |
1251 | |
1252 | void |
1253 | coverage_init (const char *filename) |
1254 | { |
1255 | const char *original_filename = filename; |
1256 | int original_len = strlen (s: original_filename); |
1257 | #if HAVE_DOS_BASED_FILE_SYSTEM |
1258 | const char *separator = "\\" ; |
1259 | #else |
1260 | const char *separator = "/" ; |
1261 | #endif |
1262 | int len = strlen (s: filename); |
1263 | int prefix_len = 0; |
1264 | |
1265 | /* Since coverage_init is invoked very early, before the pass |
1266 | manager, we need to set up the dumping explicitly. This is |
1267 | similar to the handling in finish_optimization_passes. */ |
1268 | int profile_pass_num = |
1269 | g->get_passes ()->get_pass_profile ()->static_pass_number; |
1270 | g->get_dumps ()->dump_start (phase: profile_pass_num, NULL); |
1271 | |
1272 | if (!IS_ABSOLUTE_PATH (filename)) |
1273 | { |
1274 | /* When a profile_data_prefix is provided, then mangle full path |
1275 | of filename in order to prevent file path clashing. */ |
1276 | if (profile_data_prefix) |
1277 | { |
1278 | filename = concat (getpwd (), separator, filename, NULL); |
1279 | if (profile_prefix_path) |
1280 | { |
1281 | if (startswith (str: filename, profile_prefix_path)) |
1282 | { |
1283 | filename += strlen (profile_prefix_path); |
1284 | while (*filename == *separator) |
1285 | filename++; |
1286 | } |
1287 | else |
1288 | warning (0, "filename %qs does not start with profile " |
1289 | "prefix %qs" , filename, profile_prefix_path); |
1290 | } |
1291 | filename = mangle_path (base: filename); |
1292 | len = strlen (s: filename); |
1293 | } |
1294 | else |
1295 | profile_data_prefix = getpwd (); |
1296 | } |
1297 | |
1298 | if (profile_data_prefix) |
1299 | prefix_len = strlen (profile_data_prefix); |
1300 | |
1301 | /* Name of da file. */ |
1302 | da_file_name = XNEWVEC (char, len + strlen (GCOV_DATA_SUFFIX) |
1303 | + prefix_len + 2); |
1304 | |
1305 | if (profile_data_prefix) |
1306 | { |
1307 | memcpy (dest: da_file_name, profile_data_prefix, n: prefix_len); |
1308 | da_file_name[prefix_len++] = *separator; |
1309 | } |
1310 | memcpy (dest: da_file_name + prefix_len, src: filename, n: len); |
1311 | strcpy (dest: da_file_name + prefix_len + len, GCOV_DATA_SUFFIX); |
1312 | |
1313 | bbg_file_stamp = local_tick; |
1314 | if (flag_auto_profile) |
1315 | read_autofdo_file (); |
1316 | else if (flag_branch_probabilities) |
1317 | read_counts_file (); |
1318 | |
1319 | /* Name of bbg file. */ |
1320 | if (flag_test_coverage && !flag_compare_debug) |
1321 | { |
1322 | if (profile_note_location) |
1323 | bbg_file_name = xstrdup (profile_note_location); |
1324 | else |
1325 | { |
1326 | bbg_file_name = XNEWVEC (char, original_len + strlen (GCOV_NOTE_SUFFIX) + 1); |
1327 | memcpy (dest: bbg_file_name, src: original_filename, n: original_len); |
1328 | strcpy (dest: bbg_file_name + original_len, GCOV_NOTE_SUFFIX); |
1329 | } |
1330 | |
1331 | if (!gcov_open (name: bbg_file_name, mode: -1)) |
1332 | { |
1333 | error ("cannot open %s" , bbg_file_name); |
1334 | bbg_file_name = NULL; |
1335 | } |
1336 | else |
1337 | { |
1338 | gcov_write_unsigned (GCOV_NOTE_MAGIC); |
1339 | gcov_write_unsigned (GCOV_VERSION); |
1340 | gcov_write_unsigned (value: bbg_file_stamp); |
1341 | /* Use an arbitrary checksum */ |
1342 | gcov_write_unsigned (value: 0); |
1343 | gcov_write_string (string: getpwd ()); |
1344 | |
1345 | /* Do not support has_unexecuted_blocks for Ada. */ |
1346 | gcov_write_unsigned (value: strcmp (s1: lang_hooks.name, s2: "GNU Ada" ) != 0); |
1347 | } |
1348 | } |
1349 | |
1350 | g->get_dumps ()->dump_finish (phase: profile_pass_num); |
1351 | } |
1352 | |
1353 | /* Performs file-level cleanup. Close notes file, generate coverage |
1354 | variables and constructor. */ |
1355 | |
1356 | void |
1357 | coverage_finish (void) |
1358 | { |
1359 | if (bbg_file_name && gcov_close ()) |
1360 | unlink (name: bbg_file_name); |
1361 | |
1362 | if (!flag_branch_probabilities && flag_test_coverage |
1363 | && (!local_tick || local_tick == (unsigned)-1)) |
1364 | /* Only remove the da file, if we're emitting coverage code and |
1365 | cannot uniquely stamp it. If we can stamp it, libgcov will DTRT. */ |
1366 | unlink (name: da_file_name); |
1367 | |
1368 | /* Global GCDA checksum that aggregates all functions. */ |
1369 | unsigned object_checksum = 0; |
1370 | |
1371 | if (coverage_obj_init ()) |
1372 | { |
1373 | vec<constructor_elt, va_gc> *fn_ctor = NULL; |
1374 | struct coverage_data *fn; |
1375 | |
1376 | for (fn = functions_head; fn; fn = fn->next) |
1377 | { |
1378 | fn_ctor = coverage_obj_fn (ctor: fn_ctor, fn: fn->fn_decl, data: fn); |
1379 | |
1380 | object_checksum = crc32_unsigned (chksum: object_checksum, value: fn->ident); |
1381 | object_checksum = crc32_unsigned (chksum: object_checksum, |
1382 | value: fn->lineno_checksum); |
1383 | object_checksum = crc32_unsigned (chksum: object_checksum, value: fn->cfg_checksum); |
1384 | } |
1385 | coverage_obj_finish (ctor: fn_ctor, object_checksum); |
1386 | } |
1387 | |
1388 | XDELETEVEC (da_file_name); |
1389 | da_file_name = NULL; |
1390 | } |
1391 | |
1392 | #include "gt-coverage.h" |
1393 | |