1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
|
/* Read and write coverage files, and associated functionality.
Copyright (C) 1990-2020 Free Software Foundation, Inc.
Contributed by James E. Wilson, UC Berkeley/Cygnus Support;
based on some ideas from Dain Samples of UC Berkeley.
Further mangling by Bob Manson, Cygnus Support.
Further mangled by Nathan Sidwell, CodeSourcery
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#define GCOV_LINKAGE
#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "backend.h"
#include "target.h"
#include "rtl.h"
#include "tree.h"
#include "tree-pass.h"
#include "memmodel.h"
#include "tm_p.h"
#include "stringpool.h"
#include "cgraph.h"
#include "coverage.h"
#include "diagnostic-core.h"
#include "fold-const.h"
#include "stor-layout.h"
#include "output.h"
#include "toplev.h"
#include "langhooks.h"
#include "tree-iterator.h"
#include "context.h"
#include "pass_manager.h"
#include "intl.h"
#include "auto-profile.h"
#include "profile.h"
#include "diagnostic.h"
#include "gcov-io.c"
struct GTY((chain_next ("%h.next"))) coverage_data
{
struct coverage_data *next; /* next function */
unsigned ident; /* function ident */
unsigned lineno_checksum; /* function lineno checksum */
unsigned cfg_checksum; /* function cfg checksum */
tree fn_decl; /* the function decl */
tree ctr_vars[GCOV_COUNTERS]; /* counter variables. */
};
/* Counts information for a function. */
struct counts_entry : pointer_hash <counts_entry>
{
/* We hash by */
unsigned ident;
unsigned ctr;
/* Store */
unsigned lineno_checksum;
unsigned cfg_checksum;
gcov_type *counts;
unsigned n_counts;
/* hash_table support. */
static inline hashval_t hash (const counts_entry *);
static int equal (const counts_entry *, const counts_entry *);
static void remove (counts_entry *);
};
static GTY(()) struct coverage_data *functions_head = 0;
static struct coverage_data **functions_tail = &functions_head;
static unsigned no_coverage = 0;
/* Cumulative counter information for whole program. */
static unsigned prg_ctr_mask; /* Mask of counter types generated. */
/* Counter information for current function. */
static unsigned fn_ctr_mask; /* Mask of counters used. */
static GTY(()) tree fn_v_ctrs[GCOV_COUNTERS]; /* counter variables. */
static unsigned fn_n_ctrs[GCOV_COUNTERS]; /* Counters allocated. */
static unsigned fn_b_ctrs[GCOV_COUNTERS]; /* Allocation base. */
/* Coverage info VAR_DECL and function info type nodes. */
static GTY(()) tree gcov_info_var;
static GTY(()) tree gcov_fn_info_type;
static GTY(()) tree gcov_fn_info_ptr_type;
/* Name of the notes (gcno) output file. The "bbg" prefix is for
historical reasons, when the notes file contained only the
basic block graph notes.
If this is NULL we're not writing to the notes file. */
static char *bbg_file_name;
/* File stamp for notes file. */
static unsigned bbg_file_stamp;
/* Name of the count data (gcda) file. */
static char *da_file_name;
/* The names of merge functions for counters. */
#define STR(str) #str
#define DEF_GCOV_COUNTER(COUNTER, NAME, FN_TYPE) STR(__gcov_merge ## FN_TYPE),
static const char *const ctr_merge_functions[GCOV_COUNTERS] = {
#include "gcov-counter.def"
};
#undef DEF_GCOV_COUNTER
#undef STR
#define DEF_GCOV_COUNTER(COUNTER, NAME, FN_TYPE) NAME,
static const char *const ctr_names[GCOV_COUNTERS] = {
#include "gcov-counter.def"
};
#undef DEF_GCOV_COUNTER
/* Forward declarations. */
static void read_counts_file (void);
static tree build_var (tree, tree, int);
static void build_fn_info_type (tree, unsigned, tree);
static void build_info_type (tree, tree);
static tree build_fn_info (const struct coverage_data *, tree, tree);
static tree build_info (tree, tree);
static bool coverage_obj_init (void);
static vec<constructor_elt, va_gc> *coverage_obj_fn
(vec<constructor_elt, va_gc> *, tree, struct coverage_data const *);
static void coverage_obj_finish (vec<constructor_elt, va_gc> *);
/* Return the type node for gcov_type. */
tree
get_gcov_type (void)
{
scalar_int_mode mode
= smallest_int_mode_for_size (LONG_LONG_TYPE_SIZE > 32 ? 64 : 32);
return lang_hooks.types.type_for_mode (mode, false);
}
/* Return the type node for gcov_unsigned_t. */
static tree
get_gcov_unsigned_t (void)
{
scalar_int_mode mode = smallest_int_mode_for_size (32);
return lang_hooks.types.type_for_mode (mode, true);
}
inline hashval_t
counts_entry::hash (const counts_entry *entry)
{
return entry->ident * GCOV_COUNTERS + entry->ctr;
}
inline int
counts_entry::equal (const counts_entry *entry1, const counts_entry *entry2)
{
return entry1->ident == entry2->ident && entry1->ctr == entry2->ctr;
}
inline void
counts_entry::remove (counts_entry *entry)
{
free (entry->counts);
free (entry);
}
/* Hash table of count data. */
static hash_table<counts_entry> *counts_hash;
/* Read in the counts file, if available. */
static void
read_counts_file (void)
{
gcov_unsigned_t fn_ident = 0;
gcov_unsigned_t tag;
int is_error = 0;
unsigned lineno_checksum = 0;
unsigned cfg_checksum = 0;
if (!gcov_open (da_file_name, 1))
return;
if (!gcov_magic (gcov_read_unsigned (), GCOV_DATA_MAGIC))
{
warning (0, "%qs is not a gcov data file", da_file_name);
gcov_close ();
return;
}
else if ((tag = gcov_read_unsigned ()) != GCOV_VERSION)
{
char v[4], e[4];
GCOV_UNSIGNED2STRING (v, tag);
GCOV_UNSIGNED2STRING (e, GCOV_VERSION);
warning (0, "%qs is version %q.*s, expected version %q.*s",
da_file_name, 4, v, 4, e);
gcov_close ();
return;
}
/* Read the stamp, used for creating a generation count. */
tag = gcov_read_unsigned ();
bbg_file_stamp = crc32_unsigned (bbg_file_stamp, tag);
counts_hash = new hash_table<counts_entry> (10);
while ((tag = gcov_read_unsigned ()))
{
gcov_unsigned_t length;
gcov_position_t offset;
length = gcov_read_unsigned ();
offset = gcov_position ();
if (tag == GCOV_TAG_FUNCTION)
{
if (length)
{
fn_ident = gcov_read_unsigned ();
lineno_checksum = gcov_read_unsigned ();
cfg_checksum = gcov_read_unsigned ();
}
else
fn_ident = lineno_checksum = cfg_checksum = 0;
}
else if (tag == GCOV_TAG_OBJECT_SUMMARY)
{
profile_info = XCNEW (gcov_summary);
profile_info->runs = gcov_read_unsigned ();
profile_info->sum_max = gcov_read_unsigned ();
}
else if (GCOV_TAG_IS_COUNTER (tag) && fn_ident)
{
counts_entry **slot, *entry, elt;
unsigned n_counts = GCOV_TAG_COUNTER_NUM (length);
unsigned ix;
elt.ident = fn_ident;
elt.ctr = GCOV_COUNTER_FOR_TAG (tag);
slot = counts_hash->find_slot (&elt, INSERT);
entry = *slot;
if (!entry)
{
*slot = entry = XCNEW (counts_entry);
entry->ident = fn_ident;
entry->ctr = elt.ctr;
entry->lineno_checksum = lineno_checksum;
entry->cfg_checksum = cfg_checksum;
entry->counts = XCNEWVEC (gcov_type, n_counts);
entry->n_counts = n_counts;
}
else if (entry->lineno_checksum != lineno_checksum
|| entry->cfg_checksum != cfg_checksum)
{
error ("profile data for function %u is corrupted", fn_ident);
error ("checksum is (%x,%x) instead of (%x,%x)",
entry->lineno_checksum, entry->cfg_checksum,
lineno_checksum, cfg_checksum);
delete counts_hash;
counts_hash = NULL;
break;
}
for (ix = 0; ix != n_counts; ix++)
entry->counts[ix] += gcov_read_counter ();
}
gcov_sync (offset, length);
if ((is_error = gcov_is_error ()))
{
error (is_error < 0
? G_("%qs has overflowed")
: G_("%qs is corrupted"),
da_file_name);
delete counts_hash;
counts_hash = NULL;
break;
}
}
gcov_close ();
}
/* Returns the counters for a particular tag. */
gcov_type *
get_coverage_counts (unsigned counter, unsigned cfg_checksum,
unsigned lineno_checksum, unsigned int n_counts)
{
counts_entry *entry, elt;
/* No hash table, no counts. */
if (!counts_hash)
{
static int warned = 0;
if (!warned++)
{
warning (OPT_Wmissing_profile,
"%qs profile count data file not found",
da_file_name);
if (dump_enabled_p ())
{
dump_user_location_t loc
= dump_user_location_t::from_location_t (input_location);
dump_printf_loc (MSG_MISSED_OPTIMIZATION, loc,
"file %s not found, %s\n", da_file_name,
(flag_guess_branch_prob
? "execution counts estimated"
: "execution counts assumed to be zero"));
}
}
return NULL;
}
if (param_profile_func_internal_id)
elt.ident = current_function_funcdef_no + 1;
else
{
gcc_assert (coverage_node_map_initialized_p ());
elt.ident = cgraph_node::get (current_function_decl)->profile_id;
}
elt.ctr = counter;
entry = counts_hash->find (&elt);
if (!entry)
{
if (counter == GCOV_COUNTER_ARCS)
warning_at (DECL_SOURCE_LOCATION (current_function_decl),
OPT_Wmissing_profile,
"profile for function %qD not found in profile data",
current_function_decl);
/* The function was not emitted, or is weak and not chosen in the
final executable. Silently fail, because there's nothing we
can do about it. */
return NULL;
}
if (entry->cfg_checksum != cfg_checksum
|| (counter != GCOV_COUNTER_V_INDIR
&& counter != GCOV_COUNTER_V_TOPN
&& entry->n_counts != n_counts))
{
static int warned = 0;
bool warning_printed = false;
if (entry->n_counts != n_counts)
warning_printed =
warning_at (DECL_SOURCE_LOCATION (current_function_decl),
OPT_Wcoverage_mismatch,
"number of counters in profile data for function %qD "
"does not match "
"its profile data (counter %qs, expected %i and have %i)",
current_function_decl,
ctr_names[counter], entry->n_counts, n_counts);
else
warning_printed =
warning_at (DECL_SOURCE_LOCATION (current_function_decl),
OPT_Wcoverage_mismatch,
"the control flow of function %qD does not match "
"its profile data (counter %qs)", current_function_decl,
ctr_names[counter]);
if (warning_printed && dump_enabled_p ())
{
dump_user_location_t loc
= dump_user_location_t::from_function_decl (current_function_decl);
dump_printf_loc (MSG_MISSED_OPTIMIZATION, loc,
"use -Wno-error=coverage-mismatch to tolerate "
"the mismatch but performance may drop if the "
"function is hot\n");
if (!seen_error ()
&& !warned++)
{
dump_printf_loc (MSG_MISSED_OPTIMIZATION, loc,
"coverage mismatch ignored\n");
dump_printf (MSG_MISSED_OPTIMIZATION,
flag_guess_branch_prob
? G_("execution counts estimated\n")
: G_("execution counts assumed to be zero\n"));
if (!flag_guess_branch_prob)
dump_printf (MSG_MISSED_OPTIMIZATION,
"this can result in poorly optimized code\n");
}
}
return NULL;
}
else if (entry->lineno_checksum != lineno_checksum)
{
warning_at (DECL_SOURCE_LOCATION (current_function_decl),
OPT_Wcoverage_mismatch,
"source locations for function %qD have changed,"
" the profile data may be out of date",
current_function_decl);
}
return entry->counts;
}
/* Allocate NUM counters of type COUNTER. Returns nonzero if the
allocation succeeded. */
int
coverage_counter_alloc (unsigned counter, unsigned num)
{
if (no_coverage)
return 0;
if (!num)
return 1;
if (!fn_v_ctrs[counter])
{
tree array_type = build_array_type (get_gcov_type (), NULL_TREE);
fn_v_ctrs[counter]
= build_var (current_function_decl, array_type, counter);
}
fn_b_ctrs[counter] = fn_n_ctrs[counter];
fn_n_ctrs[counter] += num;
fn_ctr_mask |= 1 << counter;
return 1;
}
/* Generate a tree to access COUNTER NO. */
tree
tree_coverage_counter_ref (unsigned counter, unsigned no)
{
tree gcov_type_node = get_gcov_type ();
gcc_assert (no < fn_n_ctrs[counter] - fn_b_ctrs[counter]);
no += fn_b_ctrs[counter];
/* "no" here is an array index, scaled to bytes later. */
return build4 (ARRAY_REF, gcov_type_node, fn_v_ctrs[counter],
build_int_cst (integer_type_node, no), NULL, NULL);
}
/* Generate a tree to access the address of COUNTER NO. */
tree
tree_coverage_counter_addr (unsigned counter, unsigned no)
{
tree gcov_type_node = get_gcov_type ();
gcc_assert (no < fn_n_ctrs[counter] - fn_b_ctrs[counter]);
no += fn_b_ctrs[counter];
/* "no" here is an array index, scaled to bytes later. */
return build_fold_addr_expr (build4 (ARRAY_REF, gcov_type_node,
fn_v_ctrs[counter],
build_int_cst (integer_type_node, no),
NULL, NULL));
}
/* Generate a checksum for a string. CHKSUM is the current
checksum. */
static unsigned
coverage_checksum_string (unsigned chksum, const char *string)
{
int i;
char *dup = NULL;
/* Look for everything that looks if it were produced by
get_file_function_name and zero out the second part
that may result from flag_random_seed. This is not critical
as the checksums are used only for sanity checking. */
for (i = 0; string[i]; i++)
{
int offset = 0;
if (!strncmp (string + i, "_GLOBAL__N_", 11))
offset = 11;
if (!strncmp (string + i, "_GLOBAL__", 9))
offset = 9;
/* C++ namespaces do have scheme:
_GLOBAL__N_<filename>_<wrongmagicnumber>_<magicnumber>functionname
since filename might contain extra underscores there seems
to be no better chance then walk all possible offsets looking
for magicnumber. */
if (offset)
{
for (i = i + offset; string[i]; i++)
if (string[i]=='_')
{
int y;
for (y = 1; y < 9; y++)
if (!(string[i + y] >= '0' && string[i + y] <= '9')
&& !(string[i + y] >= 'A' && string[i + y] <= 'F'))
break;
if (y != 9 || string[i + 9] != '_')
continue;
for (y = 10; y < 18; y++)
if (!(string[i + y] >= '0' && string[i + y] <= '9')
&& !(string[i + y] >= 'A' && string[i + y] <= 'F'))
break;
if (y != 18)
continue;
if (!dup)
string = dup = xstrdup (string);
for (y = 10; y < 18; y++)
dup[i + y] = '0';
}
break;
}
}
chksum = crc32_string (chksum, string);
free (dup);
return chksum;
}
/* Compute checksum for the current function. We generate a CRC32. */
unsigned
coverage_compute_lineno_checksum (void)
{
expanded_location xloc
= expand_location (DECL_SOURCE_LOCATION (current_function_decl));
unsigned chksum = xloc.line;
if (xloc.file)
chksum = coverage_checksum_string (chksum, xloc.file);
chksum = coverage_checksum_string
(chksum, IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (current_function_decl)));
return chksum;
}
/* Compute profile ID. This is better to be unique in whole program. */
unsigned
coverage_compute_profile_id (struct cgraph_node *n)
{
unsigned chksum;
/* Externally visible symbols have unique name. */
if (TREE_PUBLIC (n->decl) || DECL_EXTERNAL (n->decl) || n->unique_name)
{
chksum = coverage_checksum_string
(0, IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (n->decl)));
}
else
{
expanded_location xloc
= expand_location (DECL_SOURCE_LOCATION (n->decl));
bool use_name_only = (param_profile_func_internal_id == 0);
chksum = (use_name_only ? 0 : xloc.line);
if (xloc.file)
chksum = coverage_checksum_string (chksum, xloc.file);
chksum = coverage_checksum_string
(chksum, IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (n->decl)));
if (!use_name_only && first_global_object_name)
chksum = coverage_checksum_string
(chksum, first_global_object_name);
chksum = coverage_checksum_string
(chksum, aux_base_name);
}
/* Non-negative integers are hopefully small enough to fit in all targets.
Gcov file formats wants non-zero function IDs. */
chksum = chksum & 0x7fffffff;
return chksum + (!chksum);
}
/* Compute cfg checksum for the function FN given as argument.
The checksum is calculated carefully so that
source code changes that doesn't affect the control flow graph
won't change the checksum.
This is to make the profile data useable across source code change.
The downside of this is that the compiler may use potentially
wrong profile data - that the source code change has non-trivial impact
on the validity of profile data (e.g. the reversed condition)
but the compiler won't detect the change and use the wrong profile data. */
unsigned
coverage_compute_cfg_checksum (struct function *fn)
{
basic_block bb;
unsigned chksum = n_basic_blocks_for_fn (fn);
FOR_EACH_BB_FN (bb, fn)
{
edge e;
edge_iterator ei;
chksum = crc32_byte (chksum, bb->index);
FOR_EACH_EDGE (e, ei, bb->succs)
{
chksum = crc32_byte (chksum, e->dest->index);
}
}
return chksum;
}
/* Begin output to the notes file for the current function.
Writes the function header. Returns nonzero if data should be output. */
int
coverage_begin_function (unsigned lineno_checksum, unsigned cfg_checksum)
{
expanded_location xloc;
unsigned long offset;
/* We don't need to output .gcno file unless we're under -ftest-coverage
(e.g. -fprofile-arcs/generate/use don't need .gcno to work). */
if (no_coverage || !bbg_file_name)
return 0;
xloc = expand_location (DECL_SOURCE_LOCATION (current_function_decl));
/* Announce function */
offset = gcov_write_tag (GCOV_TAG_FUNCTION);
if (param_profile_func_internal_id)
gcov_write_unsigned (current_function_funcdef_no + 1);
else
{
gcc_assert (coverage_node_map_initialized_p ());
gcov_write_unsigned (
cgraph_node::get (current_function_decl)->profile_id);
}
gcov_write_unsigned (lineno_checksum);
gcov_write_unsigned (cfg_checksum);
gcov_write_string (IDENTIFIER_POINTER
(DECL_ASSEMBLER_NAME (current_function_decl)));
gcov_write_unsigned (DECL_ARTIFICIAL (current_function_decl)
&& !DECL_FUNCTION_VERSIONED (current_function_decl)
&& !DECL_LAMBDA_FUNCTION_P (current_function_decl));
gcov_write_filename (xloc.file);
gcov_write_unsigned (xloc.line);
gcov_write_unsigned (xloc.column);
expanded_location endloc = expand_location (cfun->function_end_locus);
/* Function can start in a single file and end in another one. */
int end_line = endloc.file == xloc.file ? endloc.line : xloc.line;
int end_column = endloc.file == xloc.file ? endloc.column: xloc.column;
gcc_assert (xloc.line <= end_line);
gcov_write_unsigned (end_line);
gcov_write_unsigned (end_column);
gcov_write_length (offset);
return !gcov_is_error ();
}
/* Finish coverage data for the current function. Verify no output
error has occurred. Save function coverage counts. */
void
coverage_end_function (unsigned lineno_checksum, unsigned cfg_checksum)
{
unsigned i;
if (bbg_file_name && gcov_is_error ())
{
warning (0, "error writing %qs", bbg_file_name);
unlink (bbg_file_name);
bbg_file_name = NULL;
}
if (fn_ctr_mask)
{
struct coverage_data *item = 0;
item = ggc_alloc<coverage_data> ();
if (param_profile_func_internal_id)
item->ident = current_function_funcdef_no + 1;
else
{
gcc_assert (coverage_node_map_initialized_p ());
item->ident = cgraph_node::get (cfun->decl)->profile_id;
}
item->lineno_checksum = lineno_checksum;
item->cfg_checksum = cfg_checksum;
item->fn_decl = current_function_decl;
item->next = 0;
*functions_tail = item;
functions_tail = &item->next;
for (i = 0; i != GCOV_COUNTERS; i++)
{
tree var = fn_v_ctrs[i];
if (item)
item->ctr_vars[i] = var;
if (var)
{
tree array_type = build_index_type (size_int (fn_n_ctrs[i] - 1));
array_type = build_array_type (get_gcov_type (), array_type);
TREE_TYPE (var) = array_type;
DECL_SIZE (var) = TYPE_SIZE (array_type);
DECL_SIZE_UNIT (var) = TYPE_SIZE_UNIT (array_type);
varpool_node::finalize_decl (var);
}
fn_b_ctrs[i] = fn_n_ctrs[i] = 0;
fn_v_ctrs[i] = NULL_TREE;
}
prg_ctr_mask |= fn_ctr_mask;
fn_ctr_mask = 0;
}
}
/* Remove coverage file if opened. */
void
coverage_remove_note_file (void)
{
if (bbg_file_name)
{
gcov_close ();
unlink (bbg_file_name);
}
}
/* Build a coverage variable of TYPE for function FN_DECL. If COUNTER
>= 0 it is a counter array, otherwise it is the function structure. */
static tree
build_var (tree fn_decl, tree type, int counter)
{
tree var = build_decl (BUILTINS_LOCATION, VAR_DECL, NULL_TREE, type);
const char *fn_name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (fn_decl));
char *buf;
size_t fn_name_len, len;
fn_name = targetm.strip_name_encoding (fn_name);
fn_name_len = strlen (fn_name);
buf = XALLOCAVEC (char, fn_name_len + 8 + sizeof (int) * 3);
if (counter < 0)
strcpy (buf, "__gcov__");
else
sprintf (buf, "__gcov%u_", counter);
len = strlen (buf);
buf[len - 1] = symbol_table::symbol_suffix_separator ();
memcpy (buf + len, fn_name, fn_name_len + 1);
DECL_NAME (var) = get_identifier (buf);
TREE_STATIC (var) = 1;
TREE_ADDRESSABLE (var) = 1;
DECL_NONALIASED (var) = 1;
SET_DECL_ALIGN (var, TYPE_ALIGN (type));
return var;
}
/* Creates the gcov_fn_info RECORD_TYPE. */
static void
build_fn_info_type (tree type, unsigned counters, tree gcov_info_type)
{
tree ctr_info = lang_hooks.types.make_type (RECORD_TYPE);
tree field, fields;
tree array_type;
gcc_assert (counters);
/* ctr_info::num */
field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE,
get_gcov_unsigned_t ());
fields = field;
/* ctr_info::values */
field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE,
build_pointer_type (get_gcov_type ()));
DECL_CHAIN (field) = fields;
fields = field;
finish_builtin_struct (ctr_info, "__gcov_ctr_info", fields, NULL_TREE);
/* key */
field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE,
build_pointer_type (build_qualified_type
(gcov_info_type, TYPE_QUAL_CONST)));
fields = field;
/* ident */
field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE,
get_gcov_unsigned_t ());
DECL_CHAIN (field) = fields;
fields = field;
/* lineno_checksum */
field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE,
get_gcov_unsigned_t ());
DECL_CHAIN (field) = fields;
fields = field;
/* cfg checksum */
field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE,
get_gcov_unsigned_t ());
DECL_CHAIN (field) = fields;
fields = field;
array_type = build_index_type (size_int (counters - 1));
array_type = build_array_type (ctr_info, array_type);
/* counters */
field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, array_type);
DECL_CHAIN (field) = fields;
fields = field;
finish_builtin_struct (type, "__gcov_fn_info", fields, NULL_TREE);
}
/* Returns a CONSTRUCTOR for a gcov_fn_info. DATA is
the coverage data for the function and TYPE is the gcov_fn_info
RECORD_TYPE. KEY is the object file key. */
static tree
build_fn_info (const struct coverage_data *data, tree type, tree key)
{
tree fields = TYPE_FIELDS (type);
tree ctr_type;
unsigned ix;
vec<constructor_elt, va_gc> *v1 = NULL;
vec<constructor_elt, va_gc> *v2 = NULL;
/* key */
CONSTRUCTOR_APPEND_ELT (v1, fields,
build1 (ADDR_EXPR, TREE_TYPE (fields), key));
fields = DECL_CHAIN (fields);
/* ident */
CONSTRUCTOR_APPEND_ELT (v1, fields,
build_int_cstu (get_gcov_unsigned_t (),
data->ident));
fields = DECL_CHAIN (fields);
/* lineno_checksum */
CONSTRUCTOR_APPEND_ELT (v1, fields,
build_int_cstu (get_gcov_unsigned_t (),
data->lineno_checksum));
fields = DECL_CHAIN (fields);
/* cfg_checksum */
CONSTRUCTOR_APPEND_ELT (v1, fields,
build_int_cstu (get_gcov_unsigned_t (),
data->cfg_checksum));
fields = DECL_CHAIN (fields);
/* counters */
ctr_type = TREE_TYPE (TREE_TYPE (fields));
for (ix = 0; ix != GCOV_COUNTERS; ix++)
if (prg_ctr_mask & (1 << ix))
{
vec<constructor_elt, va_gc> *ctr = NULL;
tree var = data->ctr_vars[ix];
unsigned count = 0;
if (var)
count
= tree_to_shwi (TYPE_MAX_VALUE (TYPE_DOMAIN (TREE_TYPE (var))))
+ 1;
CONSTRUCTOR_APPEND_ELT (ctr, TYPE_FIELDS (ctr_type),
build_int_cstu (get_gcov_unsigned_t (),
count));
if (var)
CONSTRUCTOR_APPEND_ELT (ctr, DECL_CHAIN (TYPE_FIELDS (ctr_type)),
build_fold_addr_expr (var));
CONSTRUCTOR_APPEND_ELT (v2, NULL, build_constructor (ctr_type, ctr));
}
CONSTRUCTOR_APPEND_ELT (v1, fields,
build_constructor (TREE_TYPE (fields), v2));
return build_constructor (type, v1);
}
/* Create gcov_info struct. TYPE is the incomplete RECORD_TYPE to be
completed, and FN_INFO_PTR_TYPE is a pointer to the function info type. */
static void
build_info_type (tree type, tree fn_info_ptr_type)
{
tree field, fields = NULL_TREE;
tree merge_fn_type;
/* Version ident */
field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE,
get_gcov_unsigned_t ());
DECL_CHAIN (field) = fields;
fields = field;
/* next pointer */
field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE,
build_pointer_type (build_qualified_type
(type, TYPE_QUAL_CONST)));
DECL_CHAIN (field) = fields;
fields = field;
/* stamp */
field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE,
get_gcov_unsigned_t ());
DECL_CHAIN (field) = fields;
fields = field;
/* Filename */
field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE,
build_pointer_type (build_qualified_type
(char_type_node, TYPE_QUAL_CONST)));
DECL_CHAIN (field) = fields;
fields = field;
/* merge fn array */
merge_fn_type
= build_function_type_list (void_type_node,
build_pointer_type (get_gcov_type ()),
get_gcov_unsigned_t (), NULL_TREE);
merge_fn_type
= build_array_type (build_pointer_type (merge_fn_type),
build_index_type (size_int (GCOV_COUNTERS - 1)));
field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE,
merge_fn_type);
DECL_CHAIN (field) = fields;
fields = field;
/* n_functions */
field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE,
get_gcov_unsigned_t ());
DECL_CHAIN (field) = fields;
fields = field;
/* function_info pointer pointer */
fn_info_ptr_type = build_pointer_type
(build_qualified_type (fn_info_ptr_type, TYPE_QUAL_CONST));
field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE,
fn_info_ptr_type);
DECL_CHAIN (field) = fields;
fields = field;
finish_builtin_struct (type, "__gcov_info", fields, NULL_TREE);
}
/* Returns a CONSTRUCTOR for the gcov_info object. INFO_TYPE is the
gcov_info structure type, FN_ARY is the array of pointers to
function info objects. */
static tree
build_info (tree info_type, tree fn_ary)
{
tree info_fields = TYPE_FIELDS (info_type);
tree merge_fn_type, n_funcs;
unsigned ix;
tree filename_string;
int da_file_name_len;
vec<constructor_elt, va_gc> *v1 = NULL;
vec<constructor_elt, va_gc> *v2 = NULL;
/* Version ident */
CONSTRUCTOR_APPEND_ELT (v1, info_fields,
build_int_cstu (TREE_TYPE (info_fields),
GCOV_VERSION));
info_fields = DECL_CHAIN (info_fields);
/* next -- NULL */
CONSTRUCTOR_APPEND_ELT (v1, info_fields, null_pointer_node);
info_fields = DECL_CHAIN (info_fields);
/* stamp */
CONSTRUCTOR_APPEND_ELT (v1, info_fields,
build_int_cstu (TREE_TYPE (info_fields),
bbg_file_stamp));
info_fields = DECL_CHAIN (info_fields);
/* Filename */
da_file_name_len = strlen (da_file_name);
filename_string = build_string (da_file_name_len + 1, da_file_name);
TREE_TYPE (filename_string) = build_array_type
(char_type_node, build_index_type (size_int (da_file_name_len)));
CONSTRUCTOR_APPEND_ELT (v1, info_fields,
build1 (ADDR_EXPR, TREE_TYPE (info_fields),
filename_string));
info_fields = DECL_CHAIN (info_fields);
/* merge fn array -- NULL slots indicate unmeasured counters */
merge_fn_type = TREE_TYPE (TREE_TYPE (info_fields));
for (ix = 0; ix != GCOV_COUNTERS; ix++)
{
tree ptr = null_pointer_node;
if ((1u << ix) & prg_ctr_mask)
{
tree merge_fn = build_decl (BUILTINS_LOCATION,
FUNCTION_DECL,
get_identifier (ctr_merge_functions[ix]),
TREE_TYPE (merge_fn_type));
DECL_EXTERNAL (merge_fn) = 1;
TREE_PUBLIC (merge_fn) = 1;
DECL_ARTIFICIAL (merge_fn) = 1;
TREE_NOTHROW (merge_fn) = 1;
/* Initialize assembler name so we can stream out. */
DECL_ASSEMBLER_NAME (merge_fn);
ptr = build1 (ADDR_EXPR, merge_fn_type, merge_fn);
}
CONSTRUCTOR_APPEND_ELT (v2, NULL, ptr);
}
CONSTRUCTOR_APPEND_ELT (v1, info_fields,
build_constructor (TREE_TYPE (info_fields), v2));
info_fields = DECL_CHAIN (info_fields);
/* n_functions */
n_funcs = TYPE_MAX_VALUE (TYPE_DOMAIN (TREE_TYPE (fn_ary)));
n_funcs = fold_build2 (PLUS_EXPR, TREE_TYPE (info_fields),
n_funcs, size_one_node);
CONSTRUCTOR_APPEND_ELT (v1, info_fields, n_funcs);
info_fields = DECL_CHAIN (info_fields);
/* functions */
CONSTRUCTOR_APPEND_ELT (v1, info_fields,
build1 (ADDR_EXPR, TREE_TYPE (info_fields), fn_ary));
info_fields = DECL_CHAIN (info_fields);
gcc_assert (!info_fields);
return build_constructor (info_type, v1);
}
/* Generate the constructor function to call __gcov_init. */
static void
build_init_ctor (tree gcov_info_type)
{
tree ctor, stmt, init_fn;
/* Build a decl for __gcov_init. */
init_fn = build_pointer_type (gcov_info_type);
init_fn = build_function_type_list (void_type_node, init_fn, NULL);
init_fn = build_decl (BUILTINS_LOCATION, FUNCTION_DECL,
get_identifier ("__gcov_init"), init_fn);
TREE_PUBLIC (init_fn) = 1;
DECL_EXTERNAL (init_fn) = 1;
DECL_ASSEMBLER_NAME (init_fn);
/* Generate a call to __gcov_init(&gcov_info). */
ctor = NULL;
stmt = build_fold_addr_expr (gcov_info_var);
stmt = build_call_expr (init_fn, 1, stmt);
append_to_statement_list (stmt, &ctor);
/* Generate a constructor to run it. */
int priority = SUPPORTS_INIT_PRIORITY
? MAX_RESERVED_INIT_PRIORITY: DEFAULT_INIT_PRIORITY;
cgraph_build_static_cdtor ('I', ctor, priority);
}
/* Generate the destructor function to call __gcov_exit. */
static void
build_gcov_exit_decl (void)
{
tree init_fn = build_function_type_list (void_type_node, NULL);
init_fn = build_decl (BUILTINS_LOCATION, FUNCTION_DECL,
get_identifier ("__gcov_exit"), init_fn);
TREE_PUBLIC (init_fn) = 1;
DECL_EXTERNAL (init_fn) = 1;
DECL_ASSEMBLER_NAME (init_fn);
/* Generate a call to __gcov_exit (). */
tree dtor = NULL;
tree stmt = build_call_expr (init_fn, 0);
append_to_statement_list (stmt, &dtor);
/* Generate a destructor to run it. */
int priority = SUPPORTS_INIT_PRIORITY
? MAX_RESERVED_INIT_PRIORITY: DEFAULT_INIT_PRIORITY;
cgraph_build_static_cdtor ('D', dtor, priority);
}
/* Create the gcov_info types and object. Generate the constructor
function to call __gcov_init. Does not generate the initializer
for the object. Returns TRUE if coverage data is being emitted. */
static bool
coverage_obj_init (void)
{
tree gcov_info_type;
unsigned n_counters = 0;
unsigned ix;
struct coverage_data *fn;
struct coverage_data **fn_prev;
char name_buf[32];
no_coverage = 1; /* Disable any further coverage. */
if (!prg_ctr_mask)
return false;
if (symtab->dump_file)
fprintf (symtab->dump_file, "Using data file %s\n", da_file_name);
/* Prune functions. */
for (fn_prev = &functions_head; (fn = *fn_prev);)
if (DECL_STRUCT_FUNCTION (fn->fn_decl))
fn_prev = &fn->next;
else
/* The function is not being emitted, remove from list. */
*fn_prev = fn->next;
if (functions_head == NULL)
return false;
for (ix = 0; ix != GCOV_COUNTERS; ix++)
if ((1u << ix) & prg_ctr_mask)
n_counters++;
/* Build the info and fn_info types. These are mutually recursive. */
gcov_info_type = lang_hooks.types.make_type (RECORD_TYPE);
gcov_fn_info_type = lang_hooks.types.make_type (RECORD_TYPE);
build_fn_info_type (gcov_fn_info_type, n_counters, gcov_info_type);
gcov_info_type = lang_hooks.types.make_type (RECORD_TYPE);
gcov_fn_info_ptr_type = build_pointer_type
(build_qualified_type (gcov_fn_info_type, TYPE_QUAL_CONST));
build_info_type (gcov_info_type, gcov_fn_info_ptr_type);
/* Build the gcov info var, this is referred to in its own
initializer. */
gcov_info_var = build_decl (BUILTINS_LOCATION,
VAR_DECL, NULL_TREE, gcov_info_type);
TREE_STATIC (gcov_info_var) = 1;
ASM_GENERATE_INTERNAL_LABEL (name_buf, "LPBX", 0);
DECL_NAME (gcov_info_var) = get_identifier (name_buf);
build_init_ctor (gcov_info_type);
build_gcov_exit_decl ();
return true;
}
/* Generate the coverage function info for FN and DATA. Append a
pointer to that object to CTOR and return the appended CTOR. */
static vec<constructor_elt, va_gc> *
coverage_obj_fn (vec<constructor_elt, va_gc> *ctor, tree fn,
struct coverage_data const *data)
{
tree init = build_fn_info (data, gcov_fn_info_type, gcov_info_var);
tree var = build_var (fn, gcov_fn_info_type, -1);
DECL_INITIAL (var) = init;
varpool_node::finalize_decl (var);
CONSTRUCTOR_APPEND_ELT (ctor, NULL,
build1 (ADDR_EXPR, gcov_fn_info_ptr_type, var));
return ctor;
}
/* Finalize the coverage data. Generates the array of pointers to
function objects from CTOR. Generate the gcov_info initializer. */
static void
coverage_obj_finish (vec<constructor_elt, va_gc> *ctor)
{
unsigned n_functions = vec_safe_length (ctor);
tree fn_info_ary_type = build_array_type
(build_qualified_type (gcov_fn_info_ptr_type, TYPE_QUAL_CONST),
build_index_type (size_int (n_functions - 1)));
tree fn_info_ary = build_decl (BUILTINS_LOCATION, VAR_DECL, NULL_TREE,
fn_info_ary_type);
char name_buf[32];
TREE_STATIC (fn_info_ary) = 1;
ASM_GENERATE_INTERNAL_LABEL (name_buf, "LPBX", 1);
DECL_NAME (fn_info_ary) = get_identifier (name_buf);
DECL_INITIAL (fn_info_ary) = build_constructor (fn_info_ary_type, ctor);
varpool_node::finalize_decl (fn_info_ary);
DECL_INITIAL (gcov_info_var)
= build_info (TREE_TYPE (gcov_info_var), fn_info_ary);
varpool_node::finalize_decl (gcov_info_var);
}
/* Perform file-level initialization. Read in data file, generate name
of notes file. */
void
coverage_init (const char *filename)
{
#if HAVE_DOS_BASED_FILE_SYSTEM
const char *separator = "\\";
#else
const char *separator = "/";
#endif
int len = strlen (filename);
int prefix_len = 0;
/* Since coverage_init is invoked very early, before the pass
manager, we need to set up the dumping explicitly. This is
similar to the handling in finish_optimization_passes. */
int profile_pass_num =
g->get_passes ()->get_pass_profile ()->static_pass_number;
g->get_dumps ()->dump_start (profile_pass_num, NULL);
if (!IS_ABSOLUTE_PATH (filename))
{
/* When a profile_data_prefix is provided, then mangle full path
of filename in order to prevent file path clashing. */
if (profile_data_prefix)
{
filename = concat (getpwd (), separator, filename, NULL);
if (profile_prefix_path)
{
if (!strncmp (filename, profile_prefix_path,
strlen (profile_prefix_path)))
{
filename += strlen (profile_prefix_path);
while (*filename == *separator)
filename++;
}
else
warning (0, "filename %qs does not start with profile "
"prefix %qs", filename, profile_prefix_path);
}
filename = mangle_path (filename);
len = strlen (filename);
}
else
profile_data_prefix = getpwd ();
}
if (profile_data_prefix)
prefix_len = strlen (profile_data_prefix);
/* Name of da file. */
da_file_name = XNEWVEC (char, len + strlen (GCOV_DATA_SUFFIX)
+ prefix_len + 2);
if (profile_data_prefix)
{
memcpy (da_file_name, profile_data_prefix, prefix_len);
da_file_name[prefix_len++] = *separator;
}
memcpy (da_file_name + prefix_len, filename, len);
strcpy (da_file_name + prefix_len + len, GCOV_DATA_SUFFIX);
bbg_file_stamp = local_tick;
if (flag_auto_profile)
read_autofdo_file ();
else if (flag_branch_probabilities)
read_counts_file ();
/* Name of bbg file. */
if (flag_test_coverage && !flag_compare_debug)
{
if (profile_note_location)
bbg_file_name = xstrdup (profile_note_location);
else
{
bbg_file_name = XNEWVEC (char, len + strlen (GCOV_NOTE_SUFFIX) + 1);
memcpy (bbg_file_name, filename, len);
strcpy (bbg_file_name + len, GCOV_NOTE_SUFFIX);
}
if (!gcov_open (bbg_file_name, -1))
{
error ("cannot open %s", bbg_file_name);
bbg_file_name = NULL;
}
else
{
gcov_write_unsigned (GCOV_NOTE_MAGIC);
gcov_write_unsigned (GCOV_VERSION);
gcov_write_unsigned (bbg_file_stamp);
gcov_write_string (getpwd ());
/* Do not support has_unexecuted_blocks for Ada. */
gcov_write_unsigned (strcmp (lang_hooks.name, "GNU Ada") != 0);
}
}
g->get_dumps ()->dump_finish (profile_pass_num);
}
/* Performs file-level cleanup. Close notes file, generate coverage
variables and constructor. */
void
coverage_finish (void)
{
if (bbg_file_name && gcov_close ())
unlink (bbg_file_name);
if (!flag_branch_probabilities && flag_test_coverage
&& (!local_tick || local_tick == (unsigned)-1))
/* Only remove the da file, if we're emitting coverage code and
cannot uniquely stamp it. If we can stamp it, libgcov will DTRT. */
unlink (da_file_name);
if (coverage_obj_init ())
{
vec<constructor_elt, va_gc> *fn_ctor = NULL;
struct coverage_data *fn;
for (fn = functions_head; fn; fn = fn->next)
fn_ctor = coverage_obj_fn (fn_ctor, fn->fn_decl, fn);
coverage_obj_finish (fn_ctor);
}
XDELETEVEC (da_file_name);
da_file_name = NULL;
}
#include "gt-coverage.h"
|