forked from illumos/gcc
-
Notifications
You must be signed in to change notification settings - Fork 1
/
gcov.c
1908 lines (1628 loc) · 48.6 KB
/
gcov.c
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
/* Gcov.c: prepend line execution counts and branch probabilities to a
source file.
Copyright (C) 1990, 1991, 1992, 1993, 1994, 1996, 1997, 1998,
1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
Contributed by James E. Wilson of Cygnus Support.
Mangled by Bob Manson of Cygnus Support.
Mangled further by Nathan Sidwell <nathan@codesourcery.com>
Gcov 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 2, or (at your option)
any later version.
Gcov 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 Gcov; see the file COPYING. If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
/* ??? Print a list of the ten blocks with the highest execution counts,
and list the line numbers corresponding to those blocks. Also, perhaps
list the line numbers with the highest execution counts, only printing
the first if there are several which are all listed in the same block. */
/* ??? Should have an option to print the number of basic blocks, and the
percent of them that are covered. */
/* ??? Does not correctly handle the case where two .bb files refer to
the same included source file. For example, if one has a short
file containing only inline functions, which is then included in
two other files, then there will be two .bb files which refer to
the include file, but there is no way to get the total execution
counts for the included file, can only get execution counts for one
or the other of the including files. this can be fixed by --ratios
--long-file-names --preserve-paths and perl. */
/* Need an option to show individual block counts, and show
probabilities of fall through arcs. */
#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "tm.h"
#include "intl.h"
#include "version.h"
#include <getopt.h>
#define IN_GCOV 1
#include "gcov-io.h"
#include "gcov-io.c"
/* The bbg file is generated by -ftest-coverage option. The da file is
generated by a program compiled with -fprofile-arcs. Their formats
are documented in gcov-io.h. */
/* The functions in this file for creating and solution program flow graphs
are very similar to functions in the gcc source file profile.c. In
some places we make use of the knowledge of how profile.c works to
select particular algorithms here. */
/* This is the size of the buffer used to read in source file lines. */
#define STRING_SIZE 200
struct function_info;
struct block_info;
struct source_info;
/* Describes an arc between two basic blocks. */
typedef struct arc_info
{
/* source and destination blocks. */
struct block_info *src;
struct block_info *dst;
/* transition counts. */
gcov_type count;
/* used in cycle search, so that we do not clobber original counts. */
gcov_type cs_count;
unsigned int count_valid : 1;
unsigned int on_tree : 1;
unsigned int fake : 1;
unsigned int fall_through : 1;
/* Arc is for a function that abnormally returns. */
unsigned int is_call_non_return : 1;
/* Arc is for catch/setjump. */
unsigned int is_nonlocal_return : 1;
/* Is an unconditional branch. */
unsigned int is_unconditional : 1;
/* Loop making arc. */
unsigned int cycle : 1;
/* Next branch on line. */
struct arc_info *line_next;
/* Links to next arc on src and dst lists. */
struct arc_info *succ_next;
struct arc_info *pred_next;
} arc_t;
/* Describes a basic block. Contains lists of arcs to successor and
predecessor blocks. */
typedef struct block_info
{
/* Chain of exit and entry arcs. */
arc_t *succ;
arc_t *pred;
/* Number of unprocessed exit and entry arcs. */
gcov_type num_succ;
gcov_type num_pred;
/* Block execution count. */
gcov_type count;
unsigned flags : 13;
unsigned count_valid : 1;
unsigned valid_chain : 1;
unsigned invalid_chain : 1;
/* Block is a call instrumenting site. */
unsigned is_call_site : 1; /* Does the call. */
unsigned is_call_return : 1; /* Is the return. */
/* Block is a landing pad for longjmp or throw. */
unsigned is_nonlocal_return : 1;
union
{
struct
{
/* Array of line numbers and source files. source files are
introduced by a linenumber of zero, the next 'line number' is
the number of the source file. Always starts with a source
file. */
unsigned *encoding;
unsigned num;
} line; /* Valid until blocks are linked onto lines */
struct
{
/* Single line graph cycle workspace. Used for all-blocks
mode. */
arc_t *arc;
unsigned ident;
} cycle; /* Used in all-blocks mode, after blocks are linked onto
lines. */
} u;
/* Temporary chain for solving graph, and for chaining blocks on one
line. */
struct block_info *chain;
} block_t;
/* Describes a single function. Contains an array of basic blocks. */
typedef struct function_info
{
/* Name of function. */
char *name;
unsigned ident;
unsigned checksum;
/* Array of basic blocks. */
block_t *blocks;
unsigned num_blocks;
unsigned blocks_executed;
/* Raw arc coverage counts. */
gcov_type *counts;
unsigned num_counts;
/* First line number. */
unsigned line;
struct source_info *src;
/* Next function in same source file. */
struct function_info *line_next;
/* Next function. */
struct function_info *next;
} function_t;
/* Describes coverage of a file or function. */
typedef struct coverage_info
{
int lines;
int lines_executed;
int branches;
int branches_executed;
int branches_taken;
int calls;
int calls_executed;
char *name;
} coverage_t;
/* Describes a single line of source. Contains a chain of basic blocks
with code on it. */
typedef struct line_info
{
gcov_type count; /* execution count */
union
{
arc_t *branches; /* branches from blocks that end on this
line. Used for branch-counts when not
all-blocks mode. */
block_t *blocks; /* blocks which start on this line. Used
in all-blocks mode. */
} u;
unsigned exists : 1;
} line_t;
/* Describes a file mentioned in the block graph. Contains an array
of line info. */
typedef struct source_info
{
/* Name of source file. */
char *name;
unsigned index;
/* Array of line information. */
line_t *lines;
unsigned num_lines;
coverage_t coverage;
/* Functions in this source file. These are in ascending line
number order. */
function_t *functions;
/* Next source file. */
struct source_info *next;
} source_t;
/* Holds a list of function basic block graphs. */
static function_t *functions;
/* This points to the head of the sourcefile structure list. */
static source_t *sources;
/* This holds data summary information. */
static struct gcov_summary object_summary;
static unsigned program_count;
/* Modification time of graph file. */
static time_t bbg_file_time;
/* Name and file pointer of the input file for the basic block graph. */
static char *bbg_file_name;
/* Stamp of the bbg file */
static unsigned bbg_stamp;
/* Name and file pointer of the input file for the arc count data. */
static char *da_file_name;
/* Output branch probabilities. */
static int flag_branches = 0;
/* Show unconditional branches too. */
static int flag_unconditional = 0;
/* Output a gcov file if this is true. This is on by default, and can
be turned off by the -n option. */
static int flag_gcov_file = 1;
/* For included files, make the gcov output file name include the name
of the input source file. For example, if x.h is included in a.c,
then the output file name is a.c##x.h.gcov instead of x.h.gcov. */
static int flag_long_names = 0;
/* Output count information for every basic block, not merely those
that contain line number information. */
static int flag_all_blocks = 0;
/* Output summary info for each function. */
static int flag_function_summary = 0;
/* Object directory file prefix. This is the directory/file where the
graph and data files are looked for, if nonzero. */
static char *object_directory = 0;
/* Preserve all pathname components. Needed when object files and
source files are in subdirectories. '/' is mangled as '#', '.' is
elided and '..' mangled to '^'. */
static int flag_preserve_paths = 0;
/* Output the number of times a branch was taken as opposed to the percentage
of times it was taken. */
static int flag_counts = 0;
/* Forward declarations. */
static void fnotice (FILE *, const char *, ...) ATTRIBUTE_PRINTF_2;
static int process_args (int, char **);
static void print_usage (int) ATTRIBUTE_NORETURN;
static void print_version (void) ATTRIBUTE_NORETURN;
static void process_file (const char *);
static void create_file_names (const char *);
static source_t *find_source (const char *);
static int read_graph_file (void);
static int read_count_file (void);
static void solve_flow_graph (function_t *);
static void add_branch_counts (coverage_t *, const arc_t *);
static void add_line_counts (coverage_t *, function_t *);
static void function_summary (const coverage_t *, const char *);
static const char *format_gcov (gcov_type, gcov_type, int);
static void accumulate_line_counts (source_t *);
static int output_branch_count (FILE *, int, const arc_t *);
static void output_lines (FILE *, const source_t *);
static char *make_gcov_file_name (const char *, const char *);
static void release_structures (void);
extern int main (int, char **);
int
main (int argc, char **argv)
{
int argno;
/* Unlock the stdio streams. */
unlock_std_streams ();
gcc_init_libintl ();
argno = process_args (argc, argv);
if (optind == argc)
print_usage (true);
for (; argno != argc; argno++)
{
release_structures ();
process_file (argv[argno]);
}
return 0;
}
static void
fnotice (FILE *file, const char *cmsgid, ...)
{
va_list ap;
va_start (ap, cmsgid);
vfprintf (file, _(cmsgid), ap);
va_end (ap);
}
/* Print a usage message and exit. If ERROR_P is nonzero, this is an error,
otherwise the output of --help. */
static void
print_usage (int error_p)
{
FILE *file = error_p ? stderr : stdout;
int status = error_p ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE;
fnotice (file, "Usage: gcov [OPTION]... SOURCEFILE\n\n");
fnotice (file, "Print code coverage information.\n\n");
fnotice (file, " -h, --help Print this help, then exit\n");
fnotice (file, " -v, --version Print version number, then exit\n");
fnotice (file, " -a, --all-blocks Show information for every basic block\n");
fnotice (file, " -b, --branch-probabilities Include branch probabilities in output\n");
fnotice (file, " -c, --branch-counts Given counts of branches taken\n\
rather than percentages\n");
fnotice (file, " -n, --no-output Do not create an output file\n");
fnotice (file, " -l, --long-file-names Use long output file names for included\n\
source files\n");
fnotice (file, " -f, --function-summaries Output summaries for each function\n");
fnotice (file, " -o, --object-directory DIR|FILE Search for object files in DIR or called FILE\n");
fnotice (file, " -p, --preserve-paths Preserve all pathname components\n");
fnotice (file, " -u, --unconditional-branches Show unconditional branch counts too\n");
fnotice (file, "\nFor bug reporting instructions, please see:\n%s.\n",
bug_report_url);
exit (status);
}
/* Print version information and exit. */
static void
print_version (void)
{
fnotice (stdout, "gcov (GCC) %s\n", version_string);
fprintf (stdout, "Copyright %s 2004 Free Software Foundation, Inc.\n",
_("(C)"));
fnotice (stdout,
_("This is free software; see the source for copying conditions.\n"
"There is NO warranty; not even for MERCHANTABILITY or \n"
"FITNESS FOR A PARTICULAR PURPOSE.\n\n"));
exit (SUCCESS_EXIT_CODE);
}
static const struct option options[] =
{
{ "help", no_argument, NULL, 'h' },
{ "version", no_argument, NULL, 'v' },
{ "all-blocks", no_argument, NULL, 'a' },
{ "branch-probabilities", no_argument, NULL, 'b' },
{ "branch-counts", no_argument, NULL, 'c' },
{ "no-output", no_argument, NULL, 'n' },
{ "long-file-names", no_argument, NULL, 'l' },
{ "function-summaries", no_argument, NULL, 'f' },
{ "preserve-paths", no_argument, NULL, 'p' },
{ "object-directory", required_argument, NULL, 'o' },
{ "object-file", required_argument, NULL, 'o' },
{ "unconditional-branches", no_argument, NULL, 'u' },
{ 0, 0, 0, 0 }
};
/* Process args, return index to first non-arg. */
static int
process_args (int argc, char **argv)
{
int opt;
while ((opt = getopt_long (argc, argv, "abcfhlno:puv", options, NULL)) != -1)
{
switch (opt)
{
case 'a':
flag_all_blocks = 1;
break;
case 'b':
flag_branches = 1;
break;
case 'c':
flag_counts = 1;
break;
case 'f':
flag_function_summary = 1;
break;
case 'h':
print_usage (false);
/* print_usage will exit. */
case 'l':
flag_long_names = 1;
break;
case 'n':
flag_gcov_file = 0;
break;
case 'o':
object_directory = optarg;
break;
case 'p':
flag_preserve_paths = 1;
break;
case 'u':
flag_unconditional = 1;
break;
case 'v':
print_version ();
/* print_version will exit. */
default:
print_usage (true);
/* print_usage will exit. */
}
}
return optind;
}
/* Process a single source file. */
static void
process_file (const char *file_name)
{
source_t *src;
function_t *fn;
create_file_names (file_name);
if (read_graph_file ())
return;
if (!functions)
{
fnotice (stderr, "%s:no functions found\n", bbg_file_name);
return;
}
if (read_count_file ())
return;
for (fn = functions; fn; fn = fn->next)
solve_flow_graph (fn);
for (src = sources; src; src = src->next)
src->lines = xcalloc (src->num_lines, sizeof (line_t));
for (fn = functions; fn; fn = fn->next)
{
coverage_t coverage;
memset (&coverage, 0, sizeof (coverage));
coverage.name = fn->name;
add_line_counts (flag_function_summary ? &coverage : NULL, fn);
if (flag_function_summary)
{
function_summary (&coverage, "Function");
fnotice (stdout, "\n");
}
}
for (src = sources; src; src = src->next)
{
accumulate_line_counts (src);
function_summary (&src->coverage, "File");
if (flag_gcov_file)
{
char *gcov_file_name = make_gcov_file_name (file_name, src->name);
FILE *gcov_file = fopen (gcov_file_name, "w");
if (gcov_file)
{
fnotice (stdout, "%s:creating '%s'\n",
src->name, gcov_file_name);
output_lines (gcov_file, src);
if (ferror (gcov_file))
fnotice (stderr, "%s:error writing output file '%s'\n",
src->name, gcov_file_name);
fclose (gcov_file);
}
else
fnotice (stderr, "%s:could not open output file '%s'\n",
src->name, gcov_file_name);
free (gcov_file_name);
}
fnotice (stdout, "\n");
}
}
/* Release all memory used. */
static void
release_structures (void)
{
function_t *fn;
source_t *src;
free (bbg_file_name);
free (da_file_name);
da_file_name = bbg_file_name = NULL;
bbg_file_time = 0;
bbg_stamp = 0;
while ((src = sources))
{
sources = src->next;
free (src->name);
free (src->lines);
}
while ((fn = functions))
{
unsigned ix;
block_t *block;
functions = fn->next;
for (ix = fn->num_blocks, block = fn->blocks; ix--; block++)
{
arc_t *arc, *arc_n;
for (arc = block->succ; arc; arc = arc_n)
{
arc_n = arc->succ_next;
free (arc);
}
}
free (fn->blocks);
free (fn->counts);
}
}
/* Generate the names of the graph and data files. If OBJECT_DIRECTORY
is not specified, these are looked for in the current directory,
and named from the basename of the FILE_NAME sans extension. If
OBJECT_DIRECTORY is specified and is a directory, the files are in
that directory, but named from the basename of the FILE_NAME, sans
extension. Otherwise OBJECT_DIRECTORY is taken to be the name of
the object *file*, and the data files are named from that. */
static void
create_file_names (const char *file_name)
{
char *cptr;
char *name;
int length = strlen (file_name);
int base;
if (object_directory && object_directory[0])
{
struct stat status;
length += strlen (object_directory) + 2;
name = xmalloc (length);
name[0] = 0;
base = !stat (object_directory, &status) && S_ISDIR (status.st_mode);
strcat (name, object_directory);
if (base && name[strlen (name) - 1] != '/')
strcat (name, "/");
}
else
{
name = xmalloc (length + 1);
name[0] = 0;
base = 1;
}
if (base)
{
/* Append source file name. */
cptr = strrchr (file_name, '/');
strcat (name, cptr ? cptr + 1 : file_name);
}
/* Remove the extension. */
cptr = strrchr (name, '.');
if (cptr)
*cptr = 0;
length = strlen (name);
bbg_file_name = xmalloc (length + strlen (GCOV_NOTE_SUFFIX) + 1);
strcpy (bbg_file_name, name);
strcpy (bbg_file_name + length, GCOV_NOTE_SUFFIX);
da_file_name = xmalloc (length + strlen (GCOV_DATA_SUFFIX) + 1);
strcpy (da_file_name, name);
strcpy (da_file_name + length, GCOV_DATA_SUFFIX);
return;
}
/* Find or create a source file structure for FILE_NAME. Copies
FILE_NAME on creation */
static source_t *
find_source (const char *file_name)
{
source_t *src;
if (!file_name)
file_name = "<unknown>";
for (src = sources; src; src = src->next)
if (!strcmp (file_name, src->name))
return src;
src = xcalloc (1, sizeof (source_t));
src->name = xstrdup (file_name);
src->coverage.name = src->name;
src->index = sources ? sources->index + 1 : 1;
src->next = sources;
sources = src;
return src;
}
/* Read the graph file. Return nonzero on fatal error. */
static int
read_graph_file (void)
{
unsigned version;
unsigned current_tag = 0;
struct function_info *fn = NULL;
source_t *src = NULL;
unsigned ix;
unsigned tag;
if (!gcov_open (bbg_file_name, 1))
{
fnotice (stderr, "%s:cannot open graph file\n", bbg_file_name);
return 1;
}
bbg_file_time = gcov_time ();
if (!gcov_magic (gcov_read_unsigned (), GCOV_NOTE_MAGIC))
{
fnotice (stderr, "%s:not a gcov graph file\n", bbg_file_name);
gcov_close ();
return 1;
}
version = gcov_read_unsigned ();
if (version != GCOV_VERSION)
{
char v[4], e[4];
GCOV_UNSIGNED2STRING (v, version);
GCOV_UNSIGNED2STRING (e, GCOV_VERSION);
fnotice (stderr, "%s:version '%.4s', prefer '%.4s'\n",
bbg_file_name, v, e);
}
bbg_stamp = gcov_read_unsigned ();
while ((tag = gcov_read_unsigned ()))
{
unsigned length = gcov_read_unsigned ();
gcov_position_t base = gcov_position ();
if (tag == GCOV_TAG_FUNCTION)
{
char *function_name;
unsigned ident, checksum, lineno;
source_t *src;
function_t *probe, *prev;
ident = gcov_read_unsigned ();
checksum = gcov_read_unsigned ();
function_name = xstrdup (gcov_read_string ());
src = find_source (gcov_read_string ());
lineno = gcov_read_unsigned ();
fn = xcalloc (1, sizeof (function_t));
fn->name = function_name;
fn->ident = ident;
fn->checksum = checksum;
fn->src = src;
fn->line = lineno;
fn->next = functions;
functions = fn;
current_tag = tag;
if (lineno >= src->num_lines)
src->num_lines = lineno + 1;
/* Now insert it into the source file's list of
functions. Normally functions will be encountered in
ascending order, so a simple scan is quick. */
for (probe = src->functions, prev = NULL;
probe && probe->line > lineno;
prev = probe, probe = probe->line_next)
continue;
fn->line_next = probe;
if (prev)
prev->line_next = fn;
else
src->functions = fn;
}
else if (fn && tag == GCOV_TAG_BLOCKS)
{
if (fn->blocks)
fnotice (stderr, "%s:already seen blocks for '%s'\n",
bbg_file_name, fn->name);
else
{
unsigned ix, num_blocks = GCOV_TAG_BLOCKS_NUM (length);
fn->num_blocks = num_blocks;
fn->blocks = xcalloc (fn->num_blocks, sizeof (block_t));
for (ix = 0; ix != num_blocks; ix++)
fn->blocks[ix].flags = gcov_read_unsigned ();
}
}
else if (fn && tag == GCOV_TAG_ARCS)
{
unsigned src = gcov_read_unsigned ();
unsigned num_dests = GCOV_TAG_ARCS_NUM (length);
if (src >= fn->num_blocks || fn->blocks[src].succ)
goto corrupt;
while (num_dests--)
{
struct arc_info *arc;
unsigned dest = gcov_read_unsigned ();
unsigned flags = gcov_read_unsigned ();
if (dest >= fn->num_blocks)
goto corrupt;
arc = xcalloc (1, sizeof (arc_t));
arc->dst = &fn->blocks[dest];
arc->src = &fn->blocks[src];
arc->count = 0;
arc->count_valid = 0;
arc->on_tree = !!(flags & GCOV_ARC_ON_TREE);
arc->fake = !!(flags & GCOV_ARC_FAKE);
arc->fall_through = !!(flags & GCOV_ARC_FALLTHROUGH);
arc->succ_next = fn->blocks[src].succ;
fn->blocks[src].succ = arc;
fn->blocks[src].num_succ++;
arc->pred_next = fn->blocks[dest].pred;
fn->blocks[dest].pred = arc;
fn->blocks[dest].num_pred++;
if (arc->fake)
{
if (src)
{
/* Exceptional exit from this function, the
source block must be a call. */
fn->blocks[src].is_call_site = 1;
arc->is_call_non_return = 1;
}
else
{
/* Non-local return from a callee of this
function. The destination block is a catch or
setjmp. */
arc->is_nonlocal_return = 1;
fn->blocks[dest].is_nonlocal_return = 1;
}
}
if (!arc->on_tree)
fn->num_counts++;
}
}
else if (fn && tag == GCOV_TAG_LINES)
{
unsigned blockno = gcov_read_unsigned ();
unsigned *line_nos = xcalloc (length - 1, sizeof (unsigned));
if (blockno >= fn->num_blocks || fn->blocks[blockno].u.line.encoding)
goto corrupt;
for (ix = 0; ; )
{
unsigned lineno = gcov_read_unsigned ();
if (lineno)
{
if (!ix)
{
line_nos[ix++] = 0;
line_nos[ix++] = src->index;
}
line_nos[ix++] = lineno;
if (lineno >= src->num_lines)
src->num_lines = lineno + 1;
}
else
{
const char *file_name = gcov_read_string ();
if (!file_name)
break;
src = find_source (file_name);
line_nos[ix++] = 0;
line_nos[ix++] = src->index;
}
}
fn->blocks[blockno].u.line.encoding = line_nos;
fn->blocks[blockno].u.line.num = ix;
}
else if (current_tag && !GCOV_TAG_IS_SUBTAG (current_tag, tag))
{
fn = NULL;
current_tag = 0;
}
gcov_sync (base, length);
if (gcov_is_error ())
{
corrupt:;
fnotice (stderr, "%s:corrupted\n", bbg_file_name);
gcov_close ();
return 1;
}
}
gcov_close ();
/* We built everything backwards, so nreverse them all. */
/* Reverse sources. Not strictly necessary, but we'll then process
them in the 'expected' order. */
{
source_t *src, *src_p, *src_n;
for (src_p = NULL, src = sources; src; src_p = src, src = src_n)
{
src_n = src->next;
src->next = src_p;
}
sources = src_p;
}
/* Reverse functions. */
{
function_t *fn, *fn_p, *fn_n;
for (fn_p = NULL, fn = functions; fn; fn_p = fn, fn = fn_n)
{
unsigned ix;
fn_n = fn->next;
fn->next = fn_p;
/* Reverse the arcs. */
for (ix = fn->num_blocks; ix--;)
{
arc_t *arc, *arc_p, *arc_n;
for (arc_p = NULL, arc = fn->blocks[ix].succ; arc;
arc_p = arc, arc = arc_n)
{
arc_n = arc->succ_next;
arc->succ_next = arc_p;
}
fn->blocks[ix].succ = arc_p;
for (arc_p = NULL, arc = fn->blocks[ix].pred; arc;
arc_p = arc, arc = arc_n)
{
arc_n = arc->pred_next;
arc->pred_next = arc_p;
}
fn->blocks[ix].pred = arc_p;
}
}
functions = fn_p;
}
return 0;
}
/* Reads profiles from the count file and attach to each
function. Return nonzero if fatal error. */
static int
read_count_file (void)
{
unsigned ix;
unsigned version;
unsigned tag;
function_t *fn = NULL;
int error = 0;
if (!gcov_open (da_file_name, 1))
{
fnotice (stderr, "%s:cannot open data file\n", da_file_name);
return 1;
}
if (!gcov_magic (gcov_read_unsigned (), GCOV_DATA_MAGIC))
{
fnotice (stderr, "%s:not a gcov data file\n", da_file_name);
cleanup:;
gcov_close ();
return 1;
}
version = gcov_read_unsigned ();
if (version != GCOV_VERSION)
{
char v[4], e[4];
GCOV_UNSIGNED2STRING (v, version);
GCOV_UNSIGNED2STRING (e, GCOV_VERSION);
fnotice (stderr, "%s:version '%.4s', prefer version '%.4s'\n",
da_file_name, v, e);
}
tag = gcov_read_unsigned ();
if (tag != bbg_stamp)
{
fnotice (stderr, "%s:stamp mismatch with graph file\n", da_file_name);
goto cleanup;
}
while ((tag = gcov_read_unsigned ()))
{
unsigned length = gcov_read_unsigned ();
unsigned long base = gcov_position ();
if (tag == GCOV_TAG_OBJECT_SUMMARY)
gcov_read_summary (&object_summary);