Mercurial > hg > CbC > CbC_gcc
annotate gcc/gcov-io.c @ 60:bd49c42ec43e
remove unnecessary files
| author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
|---|---|
| date | Mon, 15 Feb 2010 17:39:45 +0900 |
| parents | 77e2b8dfacca |
| children | 04ced10e8804 |
| rev | line source |
|---|---|
| 0 | 1 /* File format for coverage information |
| 2 Copyright (C) 1996, 1997, 1998, 2000, 2002, 2003, 2004, 2005, 2007, | |
| 3 2008 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 | |
|
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49 opened. If MODE is >= 0 an existing file will be opened, if |
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50 possible, and if MODE is <= 0, a new file will be created. Use |
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51 MODE=0 to attempt to reopen an existing file and then fall back on |
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52 creating a new one. If MODE < 0, the file will be opened in |
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53 read-only mode. Otherwise it will be opened for modification. |
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54 Return zero on failure, >0 on opening an existing file and <0 on |
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55 creating a new one. */ |
| 0 | 56 |
| 57 GCOV_LINKAGE int | |
| 58 #if IN_LIBGCOV | |
| 59 gcov_open (const char *name) | |
| 60 #else | |
| 61 gcov_open (const char *name, int mode) | |
| 62 #endif | |
| 63 { | |
| 64 #if IN_LIBGCOV | |
| 65 const int mode = 0; | |
| 66 #endif | |
| 67 #if GCOV_LOCKED | |
| 68 struct flock s_flock; | |
| 69 int fd; | |
| 70 | |
| 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 | |
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76 |
| 0 | 77 gcc_assert (!gcov_var.file); |
| 78 gcov_var.start = 0; | |
| 79 gcov_var.offset = gcov_var.length = 0; | |
| 80 gcov_var.overread = -1u; | |
| 81 gcov_var.error = 0; | |
| 82 #if !IN_LIBGCOV | |
| 83 gcov_var.endian = 0; | |
| 84 #endif | |
| 85 #if GCOV_LOCKED | |
| 86 if (mode > 0) | |
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87 { |
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88 /* Read-only mode - acquire a read-lock. */ |
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89 s_flock.l_type = F_RDLCK; |
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90 fd = open (name, O_RDONLY); |
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91 } |
| 0 | 92 else |
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93 { |
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94 /* Write mode - acquire a write-lock. */ |
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95 s_flock.l_type = F_WRLCK; |
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96 fd = open (name, O_RDWR | O_CREAT, 0666); |
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97 } |
| 0 | 98 if (fd < 0) |
| 99 return 0; | |
| 100 | |
| 101 while (fcntl (fd, F_SETLKW, &s_flock) && errno == EINTR) | |
| 102 continue; | |
| 103 | |
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104 gcov_var.file = fdopen (fd, (mode > 0) ? "rb" : "r+b"); |
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105 |
| 0 | 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 | |
| 132 if (mode >= 0) | |
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133 gcov_var.file = fopen (name, (mode > 0) ? "rb" : "r+b"); |
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134 |
| 0 | 135 if (gcov_var.file) |
| 136 gcov_var.mode = 1; | |
| 137 else if (mode <= 0) | |
| 138 { | |
| 139 gcov_var.file = fopen (name, "w+b"); | |
| 140 if (gcov_var.file) | |
| 141 gcov_var.mode = mode * 2 + 1; | |
| 142 } | |
| 143 if (!gcov_var.file) | |
| 144 return 0; | |
| 145 #endif | |
| 146 | |
| 147 setbuf (gcov_var.file, (char *)0); | |
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148 |
| 0 | 149 return 1; |
| 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 | |
| 156 gcov_close (void) | |
| 157 { | |
| 158 if (gcov_var.file) | |
| 159 { | |
| 160 #if !IN_GCOV | |
| 161 if (gcov_var.offset && gcov_var.mode < 0) | |
| 162 gcov_write_block (gcov_var.offset); | |
| 163 #endif | |
| 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 | |
| 173 gcov_var.mode = 0; | |
| 174 return gcov_var.error; | |
| 175 } | |
| 176 | |
| 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 | |
| 198 #if !IN_LIBGCOV | |
| 199 static void | |
| 200 gcov_allocate (unsigned length) | |
| 201 { | |
| 202 size_t new_size = gcov_var.alloc; | |
|
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203 |
| 0 | 204 if (!new_size) |
| 205 new_size = GCOV_BLOCK_SIZE; | |
| 206 new_size += length; | |
| 207 new_size *= 2; | |
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208 |
| 0 | 209 gcov_var.alloc = new_size; |
| 210 gcov_var.buffer = XRESIZEVAR (gcov_unsigned_t, gcov_var.buffer, new_size << 2); | |
| 211 } | |
| 212 #endif | |
| 213 | |
| 214 #if !IN_GCOV | |
| 215 /* Write out the current block, if needs be. */ | |
| 216 | |
| 217 static void | |
| 218 gcov_write_block (unsigned size) | |
| 219 { | |
| 220 if (fwrite (gcov_var.buffer, size << 2, 1, gcov_var.file) != 1) | |
| 221 gcov_var.error = 1; | |
| 222 gcov_var.start += size; | |
| 223 gcov_var.offset -= size; | |
| 224 } | |
| 225 | |
| 226 /* Allocate space to write BYTES bytes to the gcov file. Return a | |
| 227 pointer to those bytes, or NULL on failure. */ | |
| 228 | |
| 229 static gcov_unsigned_t * | |
| 230 gcov_write_words (unsigned words) | |
| 231 { | |
| 232 gcov_unsigned_t *result; | |
| 233 | |
| 234 gcc_assert (gcov_var.mode < 0); | |
| 235 #if IN_LIBGCOV | |
| 236 if (gcov_var.offset >= GCOV_BLOCK_SIZE) | |
| 237 { | |
| 238 gcov_write_block (GCOV_BLOCK_SIZE); | |
| 239 if (gcov_var.offset) | |
| 240 { | |
| 241 gcc_assert (gcov_var.offset == 1); | |
| 242 memcpy (gcov_var.buffer, gcov_var.buffer + GCOV_BLOCK_SIZE, 4); | |
| 243 } | |
| 244 } | |
| 245 #else | |
| 246 if (gcov_var.offset + words > gcov_var.alloc) | |
| 247 gcov_allocate (gcov_var.offset + words); | |
| 248 #endif | |
| 249 result = &gcov_var.buffer[gcov_var.offset]; | |
| 250 gcov_var.offset += words; | |
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251 |
| 0 | 252 return result; |
| 253 } | |
| 254 | |
| 255 /* Write unsigned VALUE to coverage file. Sets error flag | |
| 256 appropriately. */ | |
| 257 | |
| 258 GCOV_LINKAGE void | |
| 259 gcov_write_unsigned (gcov_unsigned_t value) | |
| 260 { | |
| 261 gcov_unsigned_t *buffer = gcov_write_words (1); | |
| 262 | |
| 263 buffer[0] = value; | |
| 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 { | |
| 273 gcov_unsigned_t *buffer = gcov_write_words (2); | |
| 274 | |
| 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; | |
| 280 } | |
| 281 #endif /* IN_LIBGCOV */ | |
| 282 | |
| 283 #if !IN_LIBGCOV | |
| 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; | |
| 291 unsigned alloc = 0; | |
| 292 gcov_unsigned_t *buffer; | |
| 293 | |
| 294 if (string) | |
| 295 { | |
| 296 length = strlen (string); | |
| 297 alloc = (length + 4) >> 2; | |
| 298 } | |
|
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299 |
| 0 | 300 buffer = gcov_write_words (1 + alloc); |
| 301 | |
| 302 buffer[0] = alloc; | |
| 303 buffer[alloc] = 0; | |
| 304 memcpy (&buffer[1], string, length); | |
| 305 } | |
| 306 #endif | |
| 307 | |
| 308 #if !IN_LIBGCOV | |
| 309 /* Write a tag TAG and reserve space for the record length. Return a | |
| 310 value to be used for gcov_write_length. */ | |
| 311 | |
| 312 GCOV_LINKAGE gcov_position_t | |
| 313 gcov_write_tag (gcov_unsigned_t tag) | |
| 314 { | |
| 315 gcov_position_t result = gcov_var.start + gcov_var.offset; | |
| 316 gcov_unsigned_t *buffer = gcov_write_words (2); | |
| 317 | |
| 318 buffer[0] = tag; | |
| 319 buffer[1] = 0; | |
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320 |
| 0 | 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 | |
| 330 gcov_write_length (gcov_position_t position) | |
| 331 { | |
| 332 unsigned offset; | |
| 333 gcov_unsigned_t length; | |
| 334 gcov_unsigned_t *buffer; | |
| 335 | |
| 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); | |
| 339 offset = position - gcov_var.start; | |
| 340 length = gcov_var.offset - offset - 2; | |
| 341 buffer = (gcov_unsigned_t *) &gcov_var.buffer[offset]; | |
| 342 buffer[1] = length; | |
| 343 if (gcov_var.offset >= GCOV_BLOCK_SIZE) | |
| 344 gcov_write_block (gcov_var.offset); | |
| 345 } | |
| 346 | |
| 347 #else /* IN_LIBGCOV */ | |
| 348 | |
| 349 /* Write a tag TAG and length LENGTH. */ | |
| 350 | |
| 351 GCOV_LINKAGE void | |
| 352 gcov_write_tag_length (gcov_unsigned_t tag, gcov_unsigned_t length) | |
| 353 { | |
| 354 gcov_unsigned_t *buffer = gcov_write_words (2); | |
| 355 | |
| 356 buffer[0] = tag; | |
| 357 buffer[1] = length; | |
| 358 } | |
| 359 | |
| 360 /* Write a summary structure to the gcov file. Return nonzero on | |
| 361 overflow. */ | |
| 362 | |
| 363 GCOV_LINKAGE void | |
| 364 gcov_write_summary (gcov_unsigned_t tag, const struct gcov_summary *summary) | |
| 365 { | |
| 366 unsigned ix; | |
| 367 const struct gcov_ctr_summary *csum; | |
| 368 | |
| 369 gcov_write_tag_length (tag, GCOV_TAG_SUMMARY_LENGTH); | |
| 370 gcov_write_unsigned (summary->checksum); | |
| 371 for (csum = summary->ctrs, ix = GCOV_COUNTERS_SUMMABLE; ix--; csum++) | |
| 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 } | |
| 379 } | |
| 380 #endif /* IN_LIBGCOV */ | |
| 381 | |
| 382 #endif /*!IN_GCOV */ | |
| 383 | |
| 384 /* Return a pointer to read BYTES bytes from the gcov file. Returns | |
| 385 NULL on failure (read past EOF). */ | |
| 386 | |
| 387 static const gcov_unsigned_t * | |
| 388 gcov_read_words (unsigned words) | |
| 389 { | |
| 390 const gcov_unsigned_t *result; | |
| 391 unsigned excess = gcov_var.length - gcov_var.offset; | |
|
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392 |
| 0 | 393 gcc_assert (gcov_var.mode > 0); |
| 394 if (excess < words) | |
| 395 { | |
| 396 gcov_var.start += gcov_var.offset; | |
| 397 #if IN_LIBGCOV | |
| 398 if (excess) | |
| 399 { | |
| 400 gcc_assert (excess == 1); | |
| 401 memcpy (gcov_var.buffer, gcov_var.buffer + gcov_var.offset, 4); | |
| 402 } | |
| 403 #else | |
| 404 memmove (gcov_var.buffer, gcov_var.buffer + gcov_var.offset, excess * 4); | |
| 405 #endif | |
| 406 gcov_var.offset = 0; | |
| 407 gcov_var.length = excess; | |
| 408 #if IN_LIBGCOV | |
| 409 gcc_assert (!gcov_var.length || gcov_var.length == 1); | |
| 410 excess = GCOV_BLOCK_SIZE; | |
| 411 #else | |
| 412 if (gcov_var.length + words > gcov_var.alloc) | |
| 413 gcov_allocate (gcov_var.length + words); | |
| 414 excess = gcov_var.alloc - gcov_var.length; | |
| 415 #endif | |
| 416 excess = fread (gcov_var.buffer + gcov_var.length, | |
| 417 1, excess << 2, gcov_var.file) >> 2; | |
| 418 gcov_var.length += excess; | |
| 419 if (gcov_var.length < words) | |
| 420 { | |
| 421 gcov_var.overread += words - gcov_var.length; | |
| 422 gcov_var.length = 0; | |
| 423 return 0; | |
| 424 } | |
| 425 } | |
| 426 result = &gcov_var.buffer[gcov_var.offset]; | |
| 427 gcov_var.offset += words; | |
| 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 | |
| 434 GCOV_LINKAGE gcov_unsigned_t | |
| 435 gcov_read_unsigned (void) | |
| 436 { | |
| 437 gcov_unsigned_t value; | |
| 438 const gcov_unsigned_t *buffer = gcov_read_words (1); | |
| 439 | |
| 440 if (!buffer) | |
| 441 return 0; | |
| 442 value = from_file (buffer[0]); | |
| 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 | |
| 450 gcov_read_counter (void) | |
| 451 { | |
| 452 gcov_type value; | |
| 453 const gcov_unsigned_t *buffer = gcov_read_words (2); | |
| 454 | |
| 455 if (!buffer) | |
| 456 return 0; | |
| 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; | |
| 462 | |
| 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 | |
| 470 #if !IN_LIBGCOV | |
| 471 GCOV_LINKAGE const char * | |
| 472 gcov_read_string (void) | |
| 473 { | |
| 474 unsigned length = gcov_read_unsigned (); | |
|
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475 |
| 0 | 476 if (!length) |
| 477 return 0; | |
| 478 | |
| 479 return (const char *) gcov_read_words (length); | |
| 480 } | |
| 481 #endif | |
| 482 | |
| 483 GCOV_LINKAGE void | |
| 484 gcov_read_summary (struct gcov_summary *summary) | |
| 485 { | |
| 486 unsigned ix; | |
| 487 struct gcov_ctr_summary *csum; | |
|
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488 |
| 0 | 489 summary->checksum = gcov_read_unsigned (); |
| 490 for (csum = summary->ctrs, ix = GCOV_COUNTERS_SUMMABLE; ix--; csum++) | |
| 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 } | |
| 498 } | |
| 499 | |
| 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 { | |
| 507 gcc_assert (gcov_var.mode > 0); | |
| 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; | |
| 514 fseek (gcov_var.file, base << 2, SEEK_SET); | |
| 515 gcov_var.start = ftell (gcov_var.file) >> 2; | |
| 516 } | |
| 517 } | |
| 518 #endif | |
| 519 | |
| 520 #if IN_LIBGCOV | |
| 521 /* Move to a given position in a gcov file. */ | |
| 522 | |
| 523 GCOV_LINKAGE void | |
| 524 gcov_seek (gcov_position_t base) | |
| 525 { | |
| 526 gcc_assert (gcov_var.mode < 0); | |
| 527 if (gcov_var.offset) | |
| 528 gcov_write_block (gcov_var.offset); | |
| 529 fseek (gcov_var.file, base << 2, SEEK_SET); | |
| 530 gcov_var.start = ftell (gcov_var.file) >> 2; | |
| 531 } | |
| 532 #endif | |
| 533 | |
| 534 #if IN_GCOV > 0 | |
| 535 /* Return the modification time of the current gcov file. */ | |
| 536 | |
| 537 GCOV_LINKAGE time_t | |
| 538 gcov_time (void) | |
| 539 { | |
| 540 struct stat status; | |
|
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541 |
| 0 | 542 if (fstat (fileno (gcov_var.file), &status)) |
| 543 return 0; | |
| 544 else | |
| 545 return status.st_mtime; | |
| 546 } | |
| 547 #endif /* IN_GCOV */ |