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ca29da43 | 1 | /* File format for coverage information |
fa10beec RW |
2 | Copyright (C) 1996, 1997, 1998, 2000, 2002, 2003, 2004, 2005, 2007, |
3 | 2008 Free Software Foundation, Inc. | |
ca29da43 NS |
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 | |
9dcd6f09 | 11 | Software Foundation; either version 3, or (at your option) any later |
ca29da43 NS |
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 | |
9dcd6f09 NC |
20 | along with GCC; see the file COPYING3. If not see |
21 | <http://www.gnu.org/licenses/>. */ | |
ca29da43 NS |
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 | ||
7d63a2fa NS |
26 | #if !IN_GCOV |
27 | static void gcov_write_block (unsigned); | |
330d2e2a | 28 | static gcov_unsigned_t *gcov_write_words (unsigned); |
7d63a2fa | 29 | #endif |
330d2e2a | 30 | static const gcov_unsigned_t *gcov_read_words (unsigned); |
7d63a2fa NS |
31 | #if !IN_LIBGCOV |
32 | static void gcov_allocate (unsigned); | |
33 | #endif | |
34 | ||
160e2e4f NS |
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 | ||
ca29da43 NS |
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 | |
ad467730 NV |
49 | opened. If MODE is >= 0 an existing file will be opened, if |
50 | possible, and if MODE is <= 0, a new file will be created. Use | |
51 | MODE=0 to attempt to reopen an existing file and then fall back on | |
52 | creating a new one. If MODE < 0, the file will be opened in | |
53 | read-only mode. Otherwise it will be opened for modification. | |
54 | Return zero on failure, >0 on opening an existing file and <0 on | |
55 | creating a new one. */ | |
ca29da43 NS |
56 | |
57 | GCOV_LINKAGE int | |
160e2e4f NS |
58 | #if IN_LIBGCOV |
59 | gcov_open (const char *name) | |
60 | #else | |
ca29da43 | 61 | gcov_open (const char *name, int mode) |
160e2e4f | 62 | #endif |
ca29da43 | 63 | { |
160e2e4f NS |
64 | #if IN_LIBGCOV |
65 | const int mode = 0; | |
66 | #endif | |
474f141e | 67 | #if GCOV_LOCKED |
ca29da43 | 68 | struct flock s_flock; |
c2cd64b5 | 69 | int fd; |
ca29da43 | 70 | |
ca29da43 NS |
71 | s_flock.l_whence = SEEK_SET; |
72 | s_flock.l_start = 0; | |
73 | s_flock.l_len = 0; /* Until EOF. */ | |
74 | s_flock.l_pid = getpid (); | |
75 | #endif | |
b8698a0f | 76 | |
cccd217d | 77 | gcc_assert (!gcov_var.file); |
7d63a2fa NS |
78 | gcov_var.start = 0; |
79 | gcov_var.offset = gcov_var.length = 0; | |
330d2e2a | 80 | gcov_var.overread = -1u; |
7d63a2fa | 81 | gcov_var.error = 0; |
160e2e4f NS |
82 | #if !IN_LIBGCOV |
83 | gcov_var.endian = 0; | |
84 | #endif | |
c2cd64b5 JJ |
85 | #if GCOV_LOCKED |
86 | if (mode > 0) | |
ad467730 NV |
87 | { |
88 | /* Read-only mode - acquire a read-lock. */ | |
89 | s_flock.l_type = F_RDLCK; | |
90 | fd = open (name, O_RDONLY); | |
91 | } | |
c2cd64b5 | 92 | else |
ad467730 NV |
93 | { |
94 | /* Write mode - acquire a write-lock. */ | |
95 | s_flock.l_type = F_WRLCK; | |
96 | fd = open (name, O_RDWR | O_CREAT, 0666); | |
97 | } | |
c2cd64b5 JJ |
98 | if (fd < 0) |
99 | return 0; | |
100 | ||
101 | while (fcntl (fd, F_SETLKW, &s_flock) && errno == EINTR) | |
102 | continue; | |
103 | ||
ad467730 NV |
104 | gcov_var.file = fdopen (fd, (mode > 0) ? "rb" : "r+b"); |
105 | ||
c2cd64b5 JJ |
106 | if (!gcov_var.file) |
107 | { | |
108 | close (fd); | |
109 | return 0; | |
110 | } | |
111 | ||
112 | if (mode > 0) | |
113 | gcov_var.mode = 1; | |
114 | else if (mode == 0) | |
115 | { | |
116 | struct stat st; | |
117 | ||
118 | if (fstat (fd, &st) < 0) | |
119 | { | |
120 | fclose (gcov_var.file); | |
121 | gcov_var.file = 0; | |
122 | return 0; | |
123 | } | |
124 | if (st.st_size != 0) | |
125 | gcov_var.mode = 1; | |
126 | else | |
127 | gcov_var.mode = mode * 2 + 1; | |
128 | } | |
129 | else | |
130 | gcov_var.mode = mode * 2 + 1; | |
131 | #else | |
ca29da43 | 132 | if (mode >= 0) |
ad467730 NV |
133 | gcov_var.file = fopen (name, (mode > 0) ? "rb" : "r+b"); |
134 | ||
7d63a2fa NS |
135 | if (gcov_var.file) |
136 | gcov_var.mode = 1; | |
137 | else if (mode <= 0) | |
ca29da43 | 138 | { |
ca29da43 | 139 | gcov_var.file = fopen (name, "w+b"); |
7d63a2fa | 140 | if (gcov_var.file) |
160e2e4f | 141 | gcov_var.mode = mode * 2 + 1; |
ca29da43 NS |
142 | } |
143 | if (!gcov_var.file) | |
144 | return 0; | |
ca29da43 NS |
145 | #endif |
146 | ||
c2cd64b5 | 147 | setbuf (gcov_var.file, (char *)0); |
b8698a0f | 148 | |
160e2e4f | 149 | return 1; |
ca29da43 NS |
150 | } |
151 | ||
152 | /* Close the current gcov file. Flushes data to disk. Returns nonzero | |
153 | on failure or error flag set. */ | |
154 | ||
155 | GCOV_LINKAGE int | |
82a30d6f | 156 | gcov_close (void) |
ca29da43 | 157 | { |
ca29da43 NS |
158 | if (gcov_var.file) |
159 | { | |
7d63a2fa NS |
160 | #if !IN_GCOV |
161 | if (gcov_var.offset && gcov_var.mode < 0) | |
162 | gcov_write_block (gcov_var.offset); | |
163 | #endif | |
ca29da43 NS |
164 | fclose (gcov_var.file); |
165 | gcov_var.file = 0; | |
166 | gcov_var.length = 0; | |
167 | } | |
168 | #if !IN_LIBGCOV | |
169 | free (gcov_var.buffer); | |
170 | gcov_var.alloc = 0; | |
171 | gcov_var.buffer = 0; | |
172 | #endif | |
7d63a2fa NS |
173 | gcov_var.mode = 0; |
174 | return gcov_var.error; | |
175 | } | |
176 | ||
160e2e4f NS |
177 | #if !IN_LIBGCOV |
178 | /* Check if MAGIC is EXPECTED. Use it to determine endianness of the | |
179 | file. Returns +1 for same endian, -1 for other endian and zero for | |
180 | not EXPECTED. */ | |
181 | ||
182 | GCOV_LINKAGE int | |
183 | gcov_magic (gcov_unsigned_t magic, gcov_unsigned_t expected) | |
184 | { | |
185 | if (magic == expected) | |
186 | return 1; | |
187 | magic = (magic >> 16) | (magic << 16); | |
188 | magic = ((magic & 0xff00ff) << 8) | ((magic >> 8) & 0xff00ff); | |
189 | if (magic == expected) | |
190 | { | |
191 | gcov_var.endian = 1; | |
192 | return -1; | |
193 | } | |
194 | return 0; | |
195 | } | |
196 | #endif | |
197 | ||
7d63a2fa NS |
198 | #if !IN_LIBGCOV |
199 | static void | |
200 | gcov_allocate (unsigned length) | |
201 | { | |
202 | size_t new_size = gcov_var.alloc; | |
b8698a0f | 203 | |
7d63a2fa NS |
204 | if (!new_size) |
205 | new_size = GCOV_BLOCK_SIZE; | |
206 | new_size += length; | |
207 | new_size *= 2; | |
b8698a0f | 208 | |
7d63a2fa | 209 | gcov_var.alloc = new_size; |
1b4572a8 | 210 | gcov_var.buffer = XRESIZEVAR (gcov_unsigned_t, gcov_var.buffer, new_size << 2); |
ca29da43 | 211 | } |
7d63a2fa | 212 | #endif |
ca29da43 NS |
213 | |
214 | #if !IN_GCOV | |
7d63a2fa NS |
215 | /* Write out the current block, if needs be. */ |
216 | ||
217 | static void | |
218 | gcov_write_block (unsigned size) | |
219 | { | |
330d2e2a | 220 | if (fwrite (gcov_var.buffer, size << 2, 1, gcov_var.file) != 1) |
7d63a2fa NS |
221 | gcov_var.error = 1; |
222 | gcov_var.start += size; | |
223 | gcov_var.offset -= size; | |
224 | } | |
225 | ||
ca29da43 NS |
226 | /* Allocate space to write BYTES bytes to the gcov file. Return a |
227 | pointer to those bytes, or NULL on failure. */ | |
228 | ||
160e2e4f | 229 | static gcov_unsigned_t * |
330d2e2a | 230 | gcov_write_words (unsigned words) |
ca29da43 | 231 | { |
160e2e4f | 232 | gcov_unsigned_t *result; |
ca29da43 | 233 | |
cccd217d | 234 | gcc_assert (gcov_var.mode < 0); |
ca29da43 | 235 | #if IN_LIBGCOV |
7d63a2fa NS |
236 | if (gcov_var.offset >= GCOV_BLOCK_SIZE) |
237 | { | |
238 | gcov_write_block (GCOV_BLOCK_SIZE); | |
239 | if (gcov_var.offset) | |
ca29da43 | 240 | { |
cccd217d | 241 | gcc_assert (gcov_var.offset == 1); |
7d63a2fa | 242 | memcpy (gcov_var.buffer, gcov_var.buffer + GCOV_BLOCK_SIZE, 4); |
ca29da43 | 243 | } |
7d63a2fa | 244 | } |
ca29da43 | 245 | #else |
330d2e2a NS |
246 | if (gcov_var.offset + words > gcov_var.alloc) |
247 | gcov_allocate (gcov_var.offset + words); | |
ca29da43 | 248 | #endif |
330d2e2a NS |
249 | result = &gcov_var.buffer[gcov_var.offset]; |
250 | gcov_var.offset += words; | |
b8698a0f | 251 | |
ca29da43 NS |
252 | return result; |
253 | } | |
254 | ||
255 | /* Write unsigned VALUE to coverage file. Sets error flag | |
256 | appropriately. */ | |
257 | ||
258 | GCOV_LINKAGE void | |
9b514d25 | 259 | gcov_write_unsigned (gcov_unsigned_t value) |
ca29da43 | 260 | { |
330d2e2a | 261 | gcov_unsigned_t *buffer = gcov_write_words (1); |
ca29da43 | 262 | |
160e2e4f | 263 | buffer[0] = value; |
ca29da43 NS |
264 | } |
265 | ||
266 | /* Write counter VALUE to coverage file. Sets error flag | |
267 | appropriately. */ | |
268 | ||
269 | #if IN_LIBGCOV | |
270 | GCOV_LINKAGE void | |
271 | gcov_write_counter (gcov_type value) | |
272 | { | |
330d2e2a | 273 | gcov_unsigned_t *buffer = gcov_write_words (2); |
ca29da43 | 274 | |
160e2e4f NS |
275 | buffer[0] = (gcov_unsigned_t) value; |
276 | if (sizeof (value) > sizeof (gcov_unsigned_t)) | |
277 | buffer[1] = (gcov_unsigned_t) (value >> 32); | |
278 | else | |
279 | buffer[1] = 0; | |
ca29da43 NS |
280 | } |
281 | #endif /* IN_LIBGCOV */ | |
282 | ||
796621e8 | 283 | #if !IN_LIBGCOV |
ca29da43 NS |
284 | /* Write STRING to coverage file. Sets error flag on file |
285 | error, overflow flag on overflow */ | |
286 | ||
287 | GCOV_LINKAGE void | |
288 | gcov_write_string (const char *string) | |
289 | { | |
290 | unsigned length = 0; | |
160e2e4f NS |
291 | unsigned alloc = 0; |
292 | gcov_unsigned_t *buffer; | |
ca29da43 NS |
293 | |
294 | if (string) | |
295 | { | |
296 | length = strlen (string); | |
160e2e4f | 297 | alloc = (length + 4) >> 2; |
ca29da43 | 298 | } |
b8698a0f | 299 | |
330d2e2a | 300 | buffer = gcov_write_words (1 + alloc); |
7d63a2fa | 301 | |
160e2e4f NS |
302 | buffer[0] = alloc; |
303 | buffer[alloc] = 0; | |
304 | memcpy (&buffer[1], string, length); | |
ca29da43 | 305 | } |
796621e8 | 306 | #endif |
ca29da43 | 307 | |
474f141e | 308 | #if !IN_LIBGCOV |
ca29da43 NS |
309 | /* Write a tag TAG and reserve space for the record length. Return a |
310 | value to be used for gcov_write_length. */ | |
311 | ||
9b514d25 NS |
312 | GCOV_LINKAGE gcov_position_t |
313 | gcov_write_tag (gcov_unsigned_t tag) | |
ca29da43 | 314 | { |
7d63a2fa | 315 | gcov_position_t result = gcov_var.start + gcov_var.offset; |
330d2e2a | 316 | gcov_unsigned_t *buffer = gcov_write_words (2); |
ca29da43 | 317 | |
160e2e4f NS |
318 | buffer[0] = tag; |
319 | buffer[1] = 0; | |
b8698a0f | 320 | |
ca29da43 NS |
321 | return result; |
322 | } | |
323 | ||
324 | /* Write a record length using POSITION, which was returned by | |
325 | gcov_write_tag. The current file position is the end of the | |
326 | record, and is restored before returning. Returns nonzero on | |
327 | overflow. */ | |
328 | ||
329 | GCOV_LINKAGE void | |
9b514d25 | 330 | gcov_write_length (gcov_position_t position) |
ca29da43 | 331 | { |
7d63a2fa NS |
332 | unsigned offset; |
333 | gcov_unsigned_t length; | |
160e2e4f | 334 | gcov_unsigned_t *buffer; |
7d63a2fa | 335 | |
cccd217d NS |
336 | gcc_assert (gcov_var.mode < 0); |
337 | gcc_assert (position + 2 <= gcov_var.start + gcov_var.offset); | |
338 | gcc_assert (position >= gcov_var.start); | |
7d63a2fa | 339 | offset = position - gcov_var.start; |
330d2e2a | 340 | length = gcov_var.offset - offset - 2; |
160e2e4f NS |
341 | buffer = (gcov_unsigned_t *) &gcov_var.buffer[offset]; |
342 | buffer[1] = length; | |
7d63a2fa NS |
343 | if (gcov_var.offset >= GCOV_BLOCK_SIZE) |
344 | gcov_write_block (gcov_var.offset); | |
ca29da43 | 345 | } |
9b514d25 NS |
346 | |
347 | #else /* IN_LIBGCOV */ | |
474f141e NS |
348 | |
349 | /* Write a tag TAG and length LENGTH. */ | |
350 | ||
351 | GCOV_LINKAGE void | |
9b514d25 | 352 | gcov_write_tag_length (gcov_unsigned_t tag, gcov_unsigned_t length) |
474f141e | 353 | { |
330d2e2a | 354 | gcov_unsigned_t *buffer = gcov_write_words (2); |
474f141e | 355 | |
160e2e4f NS |
356 | buffer[0] = tag; |
357 | buffer[1] = length; | |
474f141e | 358 | } |
ca29da43 | 359 | |
6356f892 | 360 | /* Write a summary structure to the gcov file. Return nonzero on |
ca29da43 NS |
361 | overflow. */ |
362 | ||
363 | GCOV_LINKAGE void | |
9b514d25 | 364 | gcov_write_summary (gcov_unsigned_t tag, const struct gcov_summary *summary) |
ca29da43 | 365 | { |
cdb23767 NS |
366 | unsigned ix; |
367 | const struct gcov_ctr_summary *csum; | |
ca29da43 | 368 | |
474f141e | 369 | gcov_write_tag_length (tag, GCOV_TAG_SUMMARY_LENGTH); |
ca29da43 | 370 | gcov_write_unsigned (summary->checksum); |
9b514d25 | 371 | for (csum = summary->ctrs, ix = GCOV_COUNTERS_SUMMABLE; ix--; csum++) |
cdb23767 NS |
372 | { |
373 | gcov_write_unsigned (csum->num); | |
374 | gcov_write_unsigned (csum->runs); | |
375 | gcov_write_counter (csum->sum_all); | |
376 | gcov_write_counter (csum->run_max); | |
377 | gcov_write_counter (csum->sum_max); | |
378 | } | |
ca29da43 NS |
379 | } |
380 | #endif /* IN_LIBGCOV */ | |
381 | ||
382 | #endif /*!IN_GCOV */ | |
383 | ||
384 | /* Return a pointer to read BYTES bytes from the gcov file. Returns | |
71c0e7fc | 385 | NULL on failure (read past EOF). */ |
ca29da43 | 386 | |
160e2e4f | 387 | static const gcov_unsigned_t * |
330d2e2a | 388 | gcov_read_words (unsigned words) |
ca29da43 | 389 | { |
160e2e4f | 390 | const gcov_unsigned_t *result; |
7d63a2fa | 391 | unsigned excess = gcov_var.length - gcov_var.offset; |
b8698a0f | 392 | |
cccd217d | 393 | gcc_assert (gcov_var.mode > 0); |
330d2e2a | 394 | if (excess < words) |
ca29da43 | 395 | { |
7d63a2fa NS |
396 | gcov_var.start += gcov_var.offset; |
397 | #if IN_LIBGCOV | |
398 | if (excess) | |
399 | { | |
cccd217d | 400 | gcc_assert (excess == 1); |
7d63a2fa NS |
401 | memcpy (gcov_var.buffer, gcov_var.buffer + gcov_var.offset, 4); |
402 | } | |
403 | #else | |
f820b0cf | 404 | memmove (gcov_var.buffer, gcov_var.buffer + gcov_var.offset, excess * 4); |
7d63a2fa NS |
405 | #endif |
406 | gcov_var.offset = 0; | |
407 | gcov_var.length = excess; | |
408 | #if IN_LIBGCOV | |
cccd217d | 409 | gcc_assert (!gcov_var.length || gcov_var.length == 1); |
7d63a2fa NS |
410 | excess = GCOV_BLOCK_SIZE; |
411 | #else | |
330d2e2a NS |
412 | if (gcov_var.length + words > gcov_var.alloc) |
413 | gcov_allocate (gcov_var.length + words); | |
7d63a2fa NS |
414 | excess = gcov_var.alloc - gcov_var.length; |
415 | #endif | |
dc1f1d7f | 416 | excess = fread (gcov_var.buffer + gcov_var.length, |
330d2e2a | 417 | 1, excess << 2, gcov_var.file) >> 2; |
7d63a2fa | 418 | gcov_var.length += excess; |
330d2e2a | 419 | if (gcov_var.length < words) |
7d63a2fa | 420 | { |
330d2e2a | 421 | gcov_var.overread += words - gcov_var.length; |
7d63a2fa NS |
422 | gcov_var.length = 0; |
423 | return 0; | |
424 | } | |
ca29da43 | 425 | } |
330d2e2a NS |
426 | result = &gcov_var.buffer[gcov_var.offset]; |
427 | gcov_var.offset += words; | |
ca29da43 NS |
428 | return result; |
429 | } | |
430 | ||
431 | /* Read unsigned value from a coverage file. Sets error flag on file | |
432 | error, overflow flag on overflow */ | |
433 | ||
9b514d25 | 434 | GCOV_LINKAGE gcov_unsigned_t |
82a30d6f | 435 | gcov_read_unsigned (void) |
ca29da43 | 436 | { |
160e2e4f | 437 | gcov_unsigned_t value; |
330d2e2a | 438 | const gcov_unsigned_t *buffer = gcov_read_words (1); |
ca29da43 NS |
439 | |
440 | if (!buffer) | |
441 | return 0; | |
160e2e4f | 442 | value = from_file (buffer[0]); |
ca29da43 NS |
443 | return value; |
444 | } | |
445 | ||
446 | /* Read counter value from a coverage file. Sets error flag on file | |
447 | error, overflow flag on overflow */ | |
448 | ||
449 | GCOV_LINKAGE gcov_type | |
82a30d6f | 450 | gcov_read_counter (void) |
ca29da43 | 451 | { |
160e2e4f | 452 | gcov_type value; |
330d2e2a | 453 | const gcov_unsigned_t *buffer = gcov_read_words (2); |
ca29da43 NS |
454 | |
455 | if (!buffer) | |
456 | return 0; | |
160e2e4f NS |
457 | value = from_file (buffer[0]); |
458 | if (sizeof (value) > sizeof (gcov_unsigned_t)) | |
459 | value |= ((gcov_type) from_file (buffer[1])) << 32; | |
460 | else if (buffer[1]) | |
461 | gcov_var.error = -1; | |
6d9901e7 | 462 | |
ca29da43 NS |
463 | return value; |
464 | } | |
465 | ||
466 | /* Read string from coverage file. Returns a pointer to a static | |
467 | buffer, or NULL on empty string. You must copy the string before | |
468 | calling another gcov function. */ | |
469 | ||
796621e8 | 470 | #if !IN_LIBGCOV |
ca29da43 | 471 | GCOV_LINKAGE const char * |
82a30d6f | 472 | gcov_read_string (void) |
ca29da43 NS |
473 | { |
474 | unsigned length = gcov_read_unsigned (); | |
b8698a0f | 475 | |
ca29da43 NS |
476 | if (!length) |
477 | return 0; | |
478 | ||
330d2e2a | 479 | return (const char *) gcov_read_words (length); |
ca29da43 | 480 | } |
796621e8 | 481 | #endif |
ca29da43 NS |
482 | |
483 | GCOV_LINKAGE void | |
484 | gcov_read_summary (struct gcov_summary *summary) | |
485 | { | |
cdb23767 NS |
486 | unsigned ix; |
487 | struct gcov_ctr_summary *csum; | |
b8698a0f | 488 | |
ca29da43 | 489 | summary->checksum = gcov_read_unsigned (); |
9b514d25 | 490 | for (csum = summary->ctrs, ix = GCOV_COUNTERS_SUMMABLE; ix--; csum++) |
cdb23767 NS |
491 | { |
492 | csum->num = gcov_read_unsigned (); | |
493 | csum->runs = gcov_read_unsigned (); | |
494 | csum->sum_all = gcov_read_counter (); | |
495 | csum->run_max = gcov_read_counter (); | |
496 | csum->sum_max = gcov_read_counter (); | |
497 | } | |
ca29da43 NS |
498 | } |
499 | ||
7d63a2fa NS |
500 | #if !IN_LIBGCOV |
501 | /* Reset to a known position. BASE should have been obtained from | |
502 | gcov_position, LENGTH should be a record length. */ | |
503 | ||
504 | GCOV_LINKAGE void | |
505 | gcov_sync (gcov_position_t base, gcov_unsigned_t length) | |
506 | { | |
cccd217d | 507 | gcc_assert (gcov_var.mode > 0); |
7d63a2fa NS |
508 | base += length; |
509 | if (base - gcov_var.start <= gcov_var.length) | |
510 | gcov_var.offset = base - gcov_var.start; | |
511 | else | |
512 | { | |
513 | gcov_var.offset = gcov_var.length = 0; | |
330d2e2a NS |
514 | fseek (gcov_var.file, base << 2, SEEK_SET); |
515 | gcov_var.start = ftell (gcov_var.file) >> 2; | |
7d63a2fa NS |
516 | } |
517 | } | |
518 | #endif | |
519 | ||
520 | #if IN_LIBGCOV | |
fa10beec | 521 | /* Move to a given position in a gcov file. */ |
7d63a2fa NS |
522 | |
523 | GCOV_LINKAGE void | |
524 | gcov_seek (gcov_position_t base) | |
525 | { | |
cccd217d | 526 | gcc_assert (gcov_var.mode < 0); |
7d63a2fa NS |
527 | if (gcov_var.offset) |
528 | gcov_write_block (gcov_var.offset); | |
00cf2913 | 529 | fseek (gcov_var.file, base << 2, SEEK_SET); |
330d2e2a | 530 | gcov_var.start = ftell (gcov_var.file) >> 2; |
7d63a2fa NS |
531 | } |
532 | #endif | |
533 | ||
ca29da43 NS |
534 | #if IN_GCOV > 0 |
535 | /* Return the modification time of the current gcov file. */ | |
536 | ||
537 | GCOV_LINKAGE time_t | |
82a30d6f | 538 | gcov_time (void) |
ca29da43 NS |
539 | { |
540 | struct stat status; | |
b8698a0f | 541 | |
ca29da43 NS |
542 | if (fstat (fileno (gcov_var.file), &status)) |
543 | return 0; | |
544 | else | |
545 | return status.st_mtime; | |
546 | } | |
547 | #endif /* IN_GCOV */ |