OpenCores
URL https://opencores.org/ocsvn/openrisc/openrisc/trunk

Subversion Repositories openrisc

[/] [openrisc/] [trunk/] [gnu-old/] [gcc-4.2.2/] [gcc/] [gcov-io.c] - Blame information for rev 827

Go to most recent revision | Details | Compare with Previous | View Log

Line No. Rev Author Line
1 38 julius
/* File format for coverage information
2
   Copyright (C) 1996, 1997, 1998, 2000, 2002, 2003, 2004, 2005, 2007
3
   Free Software Foundation, Inc.
4
   Contributed by Bob Manson <manson@cygnus.com>.
5
   Completely remangled by Nathan Sidwell <nathan@codesourcery.com>.
6
 
7
This file is part of GCC.
8
 
9
GCC is free software; you can redistribute it and/or modify it under
10
the terms of the GNU General Public License as published by the Free
11
Software Foundation; either version 3, or (at your option) any later
12
version.
13
 
14
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
15
WARRANTY; without even the implied warranty of MERCHANTABILITY or
16
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
17
for more details.
18
 
19
You should have received a copy of the GNU General Public License
20
along with GCC; see the file COPYING3.  If not see
21
<http://www.gnu.org/licenses/>.  */
22
 
23
/* Routines declared in gcov-io.h.  This file should be #included by
24
   another source file, after having #included gcov-io.h.  */
25
 
26
#if !IN_GCOV
27
static void gcov_write_block (unsigned);
28
static gcov_unsigned_t *gcov_write_words (unsigned);
29
#endif
30
static const gcov_unsigned_t *gcov_read_words (unsigned);
31
#if !IN_LIBGCOV
32
static void gcov_allocate (unsigned);
33
#endif
34
 
35
static inline gcov_unsigned_t from_file (gcov_unsigned_t value)
36
{
37
#if !IN_LIBGCOV
38
  if (gcov_var.endian)
39
    {
40
      value = (value >> 16) | (value << 16);
41
      value = ((value & 0xff00ff) << 8) | ((value >> 8) & 0xff00ff);
42
    }
43
#endif
44
  return value;
45
}
46
 
47
/* Open a gcov file. NAME is the name of the file to open and MODE
48
   indicates whether a new file should be created, or an existing file
49
   opened for modification. If MODE is >= 0 an existing file will be
50
   opened, if possible, and if MODE is <= 0, a new file will be
51
   created. Use MODE=0 to attempt to reopen an existing file and then
52
   fall back on creating a new one.  Return zero on failure, >0 on
53
   opening an existing file and <0 on creating a new one.  */
54
 
55
GCOV_LINKAGE int
56
#if IN_LIBGCOV
57
gcov_open (const char *name)
58
#else
59
gcov_open (const char *name, int mode)
60
#endif
61
{
62
#if IN_LIBGCOV
63
  const int mode = 0;
64
#endif
65
#if GCOV_LOCKED
66
  struct flock s_flock;
67
  int fd;
68
 
69
  s_flock.l_type = F_WRLCK;
70
  s_flock.l_whence = SEEK_SET;
71
  s_flock.l_start = 0;
72
  s_flock.l_len = 0; /* Until EOF.  */
73
  s_flock.l_pid = getpid ();
74
#endif
75
 
76
  gcc_assert (!gcov_var.file);
77
  gcov_var.start = 0;
78
  gcov_var.offset = gcov_var.length = 0;
79
  gcov_var.overread = -1u;
80
  gcov_var.error = 0;
81
#if !IN_LIBGCOV
82
  gcov_var.endian = 0;
83
#endif
84
#if GCOV_LOCKED
85
  if (mode > 0)
86
    fd = open (name, O_RDWR);
87
  else
88
    fd = open (name, O_RDWR | O_CREAT, 0666);
89
  if (fd < 0)
90
    return 0;
91
 
92
  while (fcntl (fd, F_SETLKW, &s_flock) && errno == EINTR)
93
    continue;
94
 
95
  gcov_var.file = fdopen (fd, "r+b");
96
  if (!gcov_var.file)
97
    {
98
      close (fd);
99
      return 0;
100
    }
101
 
102
  if (mode > 0)
103
    gcov_var.mode = 1;
104
  else if (mode == 0)
105
    {
106
      struct stat st;
107
 
108
      if (fstat (fd, &st) < 0)
109
        {
110
          fclose (gcov_var.file);
111
          gcov_var.file = 0;
112
          return 0;
113
        }
114
      if (st.st_size != 0)
115
        gcov_var.mode = 1;
116
      else
117
        gcov_var.mode = mode * 2 + 1;
118
    }
119
  else
120
    gcov_var.mode = mode * 2 + 1;
121
#else
122
  if (mode >= 0)
123
    gcov_var.file = fopen (name, "r+b");
124
  if (gcov_var.file)
125
    gcov_var.mode = 1;
126
  else if (mode <= 0)
127
    {
128
      gcov_var.file = fopen (name, "w+b");
129
      if (gcov_var.file)
130
        gcov_var.mode = mode * 2 + 1;
131
    }
132
  if (!gcov_var.file)
133
    return 0;
134
#endif
135
 
136
  setbuf (gcov_var.file, (char *)0);
137
 
138
  return 1;
139
}
140
 
141
/* Close the current gcov file. Flushes data to disk. Returns nonzero
142
   on failure or error flag set.  */
143
 
144
GCOV_LINKAGE int
145
gcov_close (void)
146
{
147
  if (gcov_var.file)
148
    {
149
#if !IN_GCOV
150
      if (gcov_var.offset && gcov_var.mode < 0)
151
        gcov_write_block (gcov_var.offset);
152
#endif
153
      fclose (gcov_var.file);
154
      gcov_var.file = 0;
155
      gcov_var.length = 0;
156
    }
157
#if !IN_LIBGCOV
158
  free (gcov_var.buffer);
159
  gcov_var.alloc = 0;
160
  gcov_var.buffer = 0;
161
#endif
162
  gcov_var.mode = 0;
163
  return gcov_var.error;
164
}
165
 
166
#if !IN_LIBGCOV
167
/* Check if MAGIC is EXPECTED. Use it to determine endianness of the
168
   file. Returns +1 for same endian, -1 for other endian and zero for
169
   not EXPECTED.  */
170
 
171
GCOV_LINKAGE int
172
gcov_magic (gcov_unsigned_t magic, gcov_unsigned_t expected)
173
{
174
  if (magic == expected)
175
    return 1;
176
  magic = (magic >> 16) | (magic << 16);
177
  magic = ((magic & 0xff00ff) << 8) | ((magic >> 8) & 0xff00ff);
178
  if (magic == expected)
179
    {
180
      gcov_var.endian = 1;
181
      return -1;
182
    }
183
  return 0;
184
}
185
#endif
186
 
187
#if !IN_LIBGCOV
188
static void
189
gcov_allocate (unsigned length)
190
{
191
  size_t new_size = gcov_var.alloc;
192
 
193
  if (!new_size)
194
    new_size = GCOV_BLOCK_SIZE;
195
  new_size += length;
196
  new_size *= 2;
197
 
198
  gcov_var.alloc = new_size;
199
  gcov_var.buffer = xrealloc (gcov_var.buffer, new_size << 2);
200
}
201
#endif
202
 
203
#if !IN_GCOV
204
/* Write out the current block, if needs be.  */
205
 
206
static void
207
gcov_write_block (unsigned size)
208
{
209
  if (fwrite (gcov_var.buffer, size << 2, 1, gcov_var.file) != 1)
210
    gcov_var.error = 1;
211
  gcov_var.start += size;
212
  gcov_var.offset -= size;
213
}
214
 
215
/* Allocate space to write BYTES bytes to the gcov file. Return a
216
   pointer to those bytes, or NULL on failure.  */
217
 
218
static gcov_unsigned_t *
219
gcov_write_words (unsigned words)
220
{
221
  gcov_unsigned_t *result;
222
 
223
  gcc_assert (gcov_var.mode < 0);
224
#if IN_LIBGCOV
225
  if (gcov_var.offset >= GCOV_BLOCK_SIZE)
226
    {
227
      gcov_write_block (GCOV_BLOCK_SIZE);
228
      if (gcov_var.offset)
229
        {
230
          gcc_assert (gcov_var.offset == 1);
231
          memcpy (gcov_var.buffer, gcov_var.buffer + GCOV_BLOCK_SIZE, 4);
232
        }
233
    }
234
#else
235
  if (gcov_var.offset + words > gcov_var.alloc)
236
    gcov_allocate (gcov_var.offset + words);
237
#endif
238
  result = &gcov_var.buffer[gcov_var.offset];
239
  gcov_var.offset += words;
240
 
241
  return result;
242
}
243
 
244
/* Write unsigned VALUE to coverage file.  Sets error flag
245
   appropriately.  */
246
 
247
GCOV_LINKAGE void
248
gcov_write_unsigned (gcov_unsigned_t value)
249
{
250
  gcov_unsigned_t *buffer = gcov_write_words (1);
251
 
252
  buffer[0] = value;
253
}
254
 
255
/* Write counter VALUE to coverage file.  Sets error flag
256
   appropriately.  */
257
 
258
#if IN_LIBGCOV
259
GCOV_LINKAGE void
260
gcov_write_counter (gcov_type value)
261
{
262
  gcov_unsigned_t *buffer = gcov_write_words (2);
263
 
264
  buffer[0] = (gcov_unsigned_t) value;
265
  if (sizeof (value) > sizeof (gcov_unsigned_t))
266
    buffer[1] = (gcov_unsigned_t) (value >> 32);
267
  else
268
    buffer[1] = 0;
269
}
270
#endif /* IN_LIBGCOV */
271
 
272
#if !IN_LIBGCOV
273
/* Write STRING to coverage file.  Sets error flag on file
274
   error, overflow flag on overflow */
275
 
276
GCOV_LINKAGE void
277
gcov_write_string (const char *string)
278
{
279
  unsigned length = 0;
280
  unsigned alloc = 0;
281
  gcov_unsigned_t *buffer;
282
 
283
  if (string)
284
    {
285
      length = strlen (string);
286
      alloc = (length + 4) >> 2;
287
    }
288
 
289
  buffer = gcov_write_words (1 + alloc);
290
 
291
  buffer[0] = alloc;
292
  buffer[alloc] = 0;
293
  memcpy (&buffer[1], string, length);
294
}
295
#endif
296
 
297
#if !IN_LIBGCOV
298
/* Write a tag TAG and reserve space for the record length. Return a
299
   value to be used for gcov_write_length.  */
300
 
301
GCOV_LINKAGE gcov_position_t
302
gcov_write_tag (gcov_unsigned_t tag)
303
{
304
  gcov_position_t result = gcov_var.start + gcov_var.offset;
305
  gcov_unsigned_t *buffer = gcov_write_words (2);
306
 
307
  buffer[0] = tag;
308
  buffer[1] = 0;
309
 
310
  return result;
311
}
312
 
313
/* Write a record length using POSITION, which was returned by
314
   gcov_write_tag.  The current file position is the end of the
315
   record, and is restored before returning.  Returns nonzero on
316
   overflow.  */
317
 
318
GCOV_LINKAGE void
319
gcov_write_length (gcov_position_t position)
320
{
321
  unsigned offset;
322
  gcov_unsigned_t length;
323
  gcov_unsigned_t *buffer;
324
 
325
  gcc_assert (gcov_var.mode < 0);
326
  gcc_assert (position + 2 <= gcov_var.start + gcov_var.offset);
327
  gcc_assert (position >= gcov_var.start);
328
  offset = position - gcov_var.start;
329
  length = gcov_var.offset - offset - 2;
330
  buffer = (gcov_unsigned_t *) &gcov_var.buffer[offset];
331
  buffer[1] = length;
332
  if (gcov_var.offset >= GCOV_BLOCK_SIZE)
333
    gcov_write_block (gcov_var.offset);
334
}
335
 
336
#else /* IN_LIBGCOV */
337
 
338
/* Write a tag TAG and length LENGTH.  */
339
 
340
GCOV_LINKAGE void
341
gcov_write_tag_length (gcov_unsigned_t tag, gcov_unsigned_t length)
342
{
343
  gcov_unsigned_t *buffer = gcov_write_words (2);
344
 
345
  buffer[0] = tag;
346
  buffer[1] = length;
347
}
348
 
349
/* Write a summary structure to the gcov file.  Return nonzero on
350
   overflow.  */
351
 
352
GCOV_LINKAGE void
353
gcov_write_summary (gcov_unsigned_t tag, const struct gcov_summary *summary)
354
{
355
  unsigned ix;
356
  const struct gcov_ctr_summary *csum;
357
 
358
  gcov_write_tag_length (tag, GCOV_TAG_SUMMARY_LENGTH);
359
  gcov_write_unsigned (summary->checksum);
360
  for (csum = summary->ctrs, ix = GCOV_COUNTERS_SUMMABLE; ix--; csum++)
361
    {
362
      gcov_write_unsigned (csum->num);
363
      gcov_write_unsigned (csum->runs);
364
      gcov_write_counter (csum->sum_all);
365
      gcov_write_counter (csum->run_max);
366
      gcov_write_counter (csum->sum_max);
367
    }
368
}
369
#endif /* IN_LIBGCOV */
370
 
371
#endif /*!IN_GCOV */
372
 
373
/* Return a pointer to read BYTES bytes from the gcov file. Returns
374
   NULL on failure (read past EOF).  */
375
 
376
static const gcov_unsigned_t *
377
gcov_read_words (unsigned words)
378
{
379
  const gcov_unsigned_t *result;
380
  unsigned excess = gcov_var.length - gcov_var.offset;
381
 
382
  gcc_assert (gcov_var.mode > 0);
383
  if (excess < words)
384
    {
385
      gcov_var.start += gcov_var.offset;
386
#if IN_LIBGCOV
387
      if (excess)
388
        {
389
          gcc_assert (excess == 1);
390
          memcpy (gcov_var.buffer, gcov_var.buffer + gcov_var.offset, 4);
391
        }
392
#else
393
      memmove (gcov_var.buffer, gcov_var.buffer + gcov_var.offset, excess * 4);
394
#endif
395
      gcov_var.offset = 0;
396
      gcov_var.length = excess;
397
#if IN_LIBGCOV
398
      gcc_assert (!gcov_var.length || gcov_var.length == 1);
399
      excess = GCOV_BLOCK_SIZE;
400
#else
401
      if (gcov_var.length + words > gcov_var.alloc)
402
        gcov_allocate (gcov_var.length + words);
403
      excess = gcov_var.alloc - gcov_var.length;
404
#endif
405
      excess = fread (gcov_var.buffer + gcov_var.length,
406
                      1, excess << 2, gcov_var.file) >> 2;
407
      gcov_var.length += excess;
408
      if (gcov_var.length < words)
409
        {
410
          gcov_var.overread += words - gcov_var.length;
411
          gcov_var.length = 0;
412
          return 0;
413
        }
414
    }
415
  result = &gcov_var.buffer[gcov_var.offset];
416
  gcov_var.offset += words;
417
  return result;
418
}
419
 
420
/* Read unsigned value from a coverage file. Sets error flag on file
421
   error, overflow flag on overflow */
422
 
423
GCOV_LINKAGE gcov_unsigned_t
424
gcov_read_unsigned (void)
425
{
426
  gcov_unsigned_t value;
427
  const gcov_unsigned_t *buffer = gcov_read_words (1);
428
 
429
  if (!buffer)
430
    return 0;
431
  value = from_file (buffer[0]);
432
  return value;
433
}
434
 
435
/* Read counter value from a coverage file. Sets error flag on file
436
   error, overflow flag on overflow */
437
 
438
GCOV_LINKAGE gcov_type
439
gcov_read_counter (void)
440
{
441
  gcov_type value;
442
  const gcov_unsigned_t *buffer = gcov_read_words (2);
443
 
444
  if (!buffer)
445
    return 0;
446
  value = from_file (buffer[0]);
447
  if (sizeof (value) > sizeof (gcov_unsigned_t))
448
    value |= ((gcov_type) from_file (buffer[1])) << 32;
449
  else if (buffer[1])
450
    gcov_var.error = -1;
451
 
452
  return value;
453
}
454
 
455
/* Read string from coverage file. Returns a pointer to a static
456
   buffer, or NULL on empty string. You must copy the string before
457
   calling another gcov function.  */
458
 
459
#if !IN_LIBGCOV
460
GCOV_LINKAGE const char *
461
gcov_read_string (void)
462
{
463
  unsigned length = gcov_read_unsigned ();
464
 
465
  if (!length)
466
    return 0;
467
 
468
  return (const char *) gcov_read_words (length);
469
}
470
#endif
471
 
472
GCOV_LINKAGE void
473
gcov_read_summary (struct gcov_summary *summary)
474
{
475
  unsigned ix;
476
  struct gcov_ctr_summary *csum;
477
 
478
  summary->checksum = gcov_read_unsigned ();
479
  for (csum = summary->ctrs, ix = GCOV_COUNTERS_SUMMABLE; ix--; csum++)
480
    {
481
      csum->num = gcov_read_unsigned ();
482
      csum->runs = gcov_read_unsigned ();
483
      csum->sum_all = gcov_read_counter ();
484
      csum->run_max = gcov_read_counter ();
485
      csum->sum_max = gcov_read_counter ();
486
    }
487
}
488
 
489
#if !IN_LIBGCOV
490
/* Reset to a known position.  BASE should have been obtained from
491
   gcov_position, LENGTH should be a record length.  */
492
 
493
GCOV_LINKAGE void
494
gcov_sync (gcov_position_t base, gcov_unsigned_t length)
495
{
496
  gcc_assert (gcov_var.mode > 0);
497
  base += length;
498
  if (base - gcov_var.start <= gcov_var.length)
499
    gcov_var.offset = base - gcov_var.start;
500
  else
501
    {
502
      gcov_var.offset = gcov_var.length = 0;
503
      fseek (gcov_var.file, base << 2, SEEK_SET);
504
      gcov_var.start = ftell (gcov_var.file) >> 2;
505
    }
506
}
507
#endif
508
 
509
#if IN_LIBGCOV
510
/* Move to the a set position in a gcov file.  */
511
 
512
GCOV_LINKAGE void
513
gcov_seek (gcov_position_t base)
514
{
515
  gcc_assert (gcov_var.mode < 0);
516
  if (gcov_var.offset)
517
    gcov_write_block (gcov_var.offset);
518
  fseek (gcov_var.file, base << 2, SEEK_SET);
519
  gcov_var.start = ftell (gcov_var.file) >> 2;
520
}
521
#endif
522
 
523
#if IN_GCOV > 0
524
/* Return the modification time of the current gcov file.  */
525
 
526
GCOV_LINKAGE time_t
527
gcov_time (void)
528
{
529
  struct stat status;
530
 
531
  if (fstat (fileno (gcov_var.file), &status))
532
    return 0;
533
  else
534
    return status.st_mtime;
535
}
536
#endif /* IN_GCOV */

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.