Stefan Reinauer | d37ab45 | 2012-12-18 16:23:28 -0800 | [diff] [blame] | 1 | /* Routines required for instrumenting a program. */ |
| 2 | /* Compile this one with gcc. */ |
| 3 | /* Copyright (C) 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
| 4 | 2000, 2001, 2002, 2003, 2004, 2005, 2008, 2009, 2010, 2011 |
| 5 | Free Software Foundation, Inc. |
| 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 | Under Section 7 of GPL version 3, you are granted additional |
| 20 | permissions described in the GCC Runtime Library Exception, version |
| 21 | 3.1, as published by the Free Software Foundation. |
| 22 | |
| 23 | You should have received a copy of the GNU General Public License and |
| 24 | a copy of the GCC Runtime Library Exception along with this program; |
| 25 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
| 26 | <http://www.gnu.org/licenses/>. */ |
| 27 | |
| 28 | #define __COREBOOT__ |
| 29 | #ifdef __COREBOOT__ |
| 30 | #include <stdlib.h> |
| 31 | #include <string.h> |
| 32 | #include <console/console.h> |
| 33 | #include <assert.h> |
| 34 | typedef s32 pid_t; |
| 35 | #define gcc_assert(x) ASSERT(x) |
| 36 | #define fprintf(file, x...) printk(BIOS_ERR, x) |
| 37 | #define alloca(size) __builtin_alloca (size) |
| 38 | #include "gcov-glue.c" |
| 39 | |
| 40 | /* Define MACROs to be used by coreboot compilation. */ |
| 41 | # define L_gcov |
| 42 | # define L_gcov_interval_profiler |
| 43 | # define L_gcov_pow2_profiler |
| 44 | # define L_gcov_one_value_profiler |
| 45 | # define L_gcov_indirect_call_profiler |
| 46 | # define L_gcov_average_profiler |
| 47 | # define L_gcov_ior_profiler |
| 48 | |
| 49 | # define HAVE_CC_TLS 0 |
| 50 | # define __GCOV_KERNEL__ |
| 51 | |
| 52 | # define IN_LIBGCOV 1 |
| 53 | # define IN_GCOV 0 |
| 54 | #else /* __COREBOOT__ */ |
| 55 | #include "tconfig.h" |
| 56 | #include "tsystem.h" |
| 57 | #include "coretypes.h" |
| 58 | #include "tm.h" |
| 59 | #include "libgcc_tm.h" |
| 60 | #endif /* __COREBOOT__ */ |
| 61 | |
| 62 | #ifndef __COREBOOT__ |
| 63 | #if defined(inhibit_libc) |
| 64 | #define IN_LIBGCOV (-1) |
| 65 | #else |
| 66 | #undef NULL /* Avoid errors if stdio.h and our stddef.h mismatch. */ |
| 67 | #include <stdio.h> |
| 68 | #define IN_LIBGCOV 1 |
| 69 | #if defined(L_gcov) |
| 70 | #define GCOV_LINKAGE /* nothing */ |
| 71 | #endif |
| 72 | #endif |
| 73 | #endif /* __COREBOOT__ */ |
| 74 | #include "gcov-io.h" |
| 75 | |
| 76 | #if defined(inhibit_libc) |
| 77 | /* If libc and its header files are not available, provide dummy functions. */ |
| 78 | |
| 79 | #ifdef L_gcov |
| 80 | void __gcov_init (struct gcov_info *p __attribute__ ((unused))) {} |
| 81 | void __gcov_flush (void) {} |
| 82 | #endif |
| 83 | |
| 84 | #ifdef L_gcov_merge_add |
| 85 | void __gcov_merge_add (gcov_type *counters __attribute__ ((unused)), |
| 86 | unsigned n_counters __attribute__ ((unused))) {} |
| 87 | #endif |
| 88 | |
| 89 | #ifdef L_gcov_merge_single |
| 90 | void __gcov_merge_single (gcov_type *counters __attribute__ ((unused)), |
| 91 | unsigned n_counters __attribute__ ((unused))) {} |
| 92 | #endif |
| 93 | |
| 94 | #ifdef L_gcov_merge_delta |
| 95 | void __gcov_merge_delta (gcov_type *counters __attribute__ ((unused)), |
| 96 | unsigned n_counters __attribute__ ((unused))) {} |
| 97 | #endif |
| 98 | |
| 99 | #else |
| 100 | |
| 101 | #ifndef __COREBOOT__ |
| 102 | #include <string.h> |
| 103 | #if GCOV_LOCKED |
| 104 | #include <fcntl.h> |
| 105 | #include <errno.h> |
| 106 | #include <sys/stat.h> |
| 107 | #endif |
| 108 | #else |
| 109 | void __gcov_merge_add(gcov_type *counters __attribute__ ((unused)), |
| 110 | unsigned n_counters __attribute__ ((unused))) {} |
| 111 | #endif /* __COREBOOT__ */ |
| 112 | |
| 113 | #ifdef L_gcov |
| 114 | #include "gcov-io.c" |
| 115 | |
| 116 | struct gcov_fn_buffer |
| 117 | { |
| 118 | struct gcov_fn_buffer *next; |
| 119 | unsigned fn_ix; |
| 120 | struct gcov_fn_info info; |
| 121 | /* note gcov_fn_info ends in a trailing array. */ |
| 122 | }; |
| 123 | |
| 124 | /* Chain of per-object gcov structures. */ |
| 125 | static struct gcov_info *gcov_list; |
| 126 | |
| 127 | /* Size of the longest file name. */ |
| 128 | static size_t gcov_max_filename = 0; |
| 129 | |
| 130 | /* Make sure path component of the given FILENAME exists, create |
| 131 | missing directories. FILENAME must be writable. |
| 132 | Returns zero on success, or -1 if an error occurred. */ |
| 133 | |
| 134 | static int |
| 135 | create_file_directory (char *filename) |
| 136 | { |
| 137 | #ifdef __COREBOOT__ |
| 138 | (void) filename; |
| 139 | return 0; |
| 140 | #else |
| 141 | #if !defined(TARGET_POSIX_IO) && !defined(_WIN32) |
| 142 | (void) filename; |
| 143 | return -1; |
| 144 | #else |
| 145 | char *s; |
| 146 | |
| 147 | s = filename; |
| 148 | |
| 149 | if (HAS_DRIVE_SPEC(s)) |
| 150 | s += 2; |
| 151 | if (IS_DIR_SEPARATOR(*s)) |
| 152 | ++s; |
| 153 | for (; *s != '\0'; s++) |
| 154 | if (IS_DIR_SEPARATOR(*s)) |
| 155 | { |
| 156 | char sep = *s; |
| 157 | *s = '\0'; |
| 158 | |
| 159 | /* Try to make directory if it doesn't already exist. */ |
| 160 | if (access (filename, F_OK) == -1 |
| 161 | #ifdef TARGET_POSIX_IO |
| 162 | && mkdir (filename, 0755) == -1 |
| 163 | #else |
| 164 | && mkdir (filename) == -1 |
| 165 | #endif |
| 166 | /* The directory might have been made by another process. */ |
| 167 | && errno != EEXIST) |
| 168 | { |
| 169 | fprintf (stderr, "profiling:%s:Cannot create directory\n", |
| 170 | filename); |
| 171 | *s = sep; |
| 172 | return -1; |
| 173 | }; |
| 174 | |
| 175 | *s = sep; |
| 176 | }; |
| 177 | return 0; |
| 178 | #endif |
| 179 | #endif |
| 180 | } |
| 181 | |
| 182 | static struct gcov_fn_buffer * |
| 183 | free_fn_data (const struct gcov_info *gi_ptr, struct gcov_fn_buffer *buffer, |
| 184 | unsigned limit) |
| 185 | { |
| 186 | struct gcov_fn_buffer *next; |
| 187 | unsigned ix, n_ctr = 0; |
| 188 | |
| 189 | if (!buffer) |
| 190 | return 0; |
| 191 | next = buffer->next; |
| 192 | |
| 193 | for (ix = 0; ix != limit; ix++) |
| 194 | if (gi_ptr->merge[ix]) |
| 195 | free (buffer->info.ctrs[n_ctr++].values); |
| 196 | free (buffer); |
| 197 | return next; |
| 198 | } |
| 199 | |
| 200 | static struct gcov_fn_buffer ** |
| 201 | buffer_fn_data (const char *filename, const struct gcov_info *gi_ptr, |
| 202 | struct gcov_fn_buffer **end_ptr, unsigned fn_ix) |
| 203 | { |
| 204 | unsigned n_ctrs = 0, ix = 0; |
| 205 | struct gcov_fn_buffer *fn_buffer; |
| 206 | unsigned len; |
| 207 | |
| 208 | for (ix = GCOV_COUNTERS; ix--;) |
| 209 | if (gi_ptr->merge[ix]) |
| 210 | n_ctrs++; |
| 211 | |
| 212 | len = sizeof (*fn_buffer) + sizeof (fn_buffer->info.ctrs[0]) * n_ctrs; |
| 213 | fn_buffer = (struct gcov_fn_buffer *)malloc (len); |
| 214 | |
| 215 | if (!fn_buffer) |
| 216 | goto fail; |
| 217 | |
| 218 | fn_buffer->next = 0; |
| 219 | fn_buffer->fn_ix = fn_ix; |
| 220 | fn_buffer->info.ident = gcov_read_unsigned (); |
| 221 | fn_buffer->info.lineno_checksum = gcov_read_unsigned (); |
| 222 | fn_buffer->info.cfg_checksum = gcov_read_unsigned (); |
| 223 | |
| 224 | for (n_ctrs = ix = 0; ix != GCOV_COUNTERS; ix++) |
| 225 | { |
| 226 | gcov_unsigned_t length; |
| 227 | gcov_type *values; |
| 228 | |
| 229 | if (!gi_ptr->merge[ix]) |
| 230 | continue; |
| 231 | |
| 232 | if (gcov_read_unsigned () != GCOV_TAG_FOR_COUNTER (ix)) |
| 233 | { |
| 234 | len = 0; |
| 235 | goto fail; |
| 236 | } |
| 237 | |
| 238 | length = GCOV_TAG_COUNTER_NUM (gcov_read_unsigned ()); |
| 239 | len = length * sizeof (gcov_type); |
| 240 | values = (gcov_type *)malloc (len); |
| 241 | if (!values) |
| 242 | goto fail; |
| 243 | |
| 244 | fn_buffer->info.ctrs[n_ctrs].num = length; |
| 245 | fn_buffer->info.ctrs[n_ctrs].values = values; |
| 246 | |
| 247 | while (length--) |
| 248 | *values++ = gcov_read_counter (); |
| 249 | n_ctrs++; |
| 250 | } |
| 251 | |
| 252 | *end_ptr = fn_buffer; |
| 253 | return &fn_buffer->next; |
| 254 | |
| 255 | fail: |
| 256 | fprintf (stderr, "profiling:%s:Function %u %s %u \n", filename, fn_ix, |
| 257 | len ? "cannot allocate" : "counter mismatch", len ? len : ix); |
| 258 | |
| 259 | return (struct gcov_fn_buffer **)free_fn_data (gi_ptr, fn_buffer, ix); |
| 260 | } |
| 261 | |
| 262 | /* Add an unsigned value to the current crc */ |
| 263 | |
| 264 | static gcov_unsigned_t |
| 265 | crc32_unsigned (gcov_unsigned_t crc32, gcov_unsigned_t value) |
| 266 | { |
| 267 | unsigned ix; |
| 268 | |
| 269 | for (ix = 32; ix--; value <<= 1) |
| 270 | { |
| 271 | unsigned feedback; |
| 272 | |
| 273 | feedback = (value ^ crc32) & 0x80000000 ? 0x04c11db7 : 0; |
| 274 | crc32 <<= 1; |
| 275 | crc32 ^= feedback; |
| 276 | } |
| 277 | |
| 278 | return crc32; |
| 279 | } |
| 280 | |
| 281 | /* Check if VERSION of the info block PTR matches libgcov one. |
| 282 | Return 1 on success, or zero in case of versions mismatch. |
| 283 | If FILENAME is not NULL, its value used for reporting purposes |
| 284 | instead of value from the info block. */ |
| 285 | |
| 286 | static int |
| 287 | gcov_version (struct gcov_info *ptr, gcov_unsigned_t version, |
| 288 | const char *filename) |
| 289 | { |
| 290 | if (version != GCOV_VERSION) |
| 291 | { |
| 292 | char v[4], e[4]; |
| 293 | |
| 294 | GCOV_UNSIGNED2STRING (v, version); |
| 295 | GCOV_UNSIGNED2STRING (e, GCOV_VERSION); |
| 296 | |
| 297 | fprintf (stderr, |
| 298 | "profiling:%s:Version mismatch - expected %.4s got %.4s\n", |
| 299 | filename? filename : ptr->filename, e, v); |
| 300 | return 0; |
| 301 | } |
| 302 | return 1; |
| 303 | } |
| 304 | |
| 305 | /* Dump the coverage counts. We merge with existing counts when |
| 306 | possible, to avoid growing the .da files ad infinitum. We use this |
| 307 | program's checksum to make sure we only accumulate whole program |
| 308 | statistics to the correct summary. An object file might be embedded |
| 309 | in two separate programs, and we must keep the two program |
| 310 | summaries separate. */ |
| 311 | |
| 312 | static void |
| 313 | gcov_exit (void) |
| 314 | { |
| 315 | struct gcov_info *gi_ptr; |
| 316 | const struct gcov_fn_info *gfi_ptr; |
| 317 | struct gcov_summary this_prg; /* summary for program. */ |
| 318 | struct gcov_summary all_prg; /* summary for all instances of program. */ |
| 319 | struct gcov_ctr_summary *cs_ptr; |
| 320 | const struct gcov_ctr_info *ci_ptr; |
| 321 | unsigned t_ix; |
| 322 | int f_ix = 0; |
| 323 | gcov_unsigned_t c_num; |
| 324 | const char *gcov_prefix; |
| 325 | int gcov_prefix_strip = 0; |
| 326 | size_t prefix_length; |
| 327 | char *gi_filename, *gi_filename_up; |
| 328 | gcov_unsigned_t crc32 = 0; |
| 329 | |
| 330 | memset (&all_prg, 0, sizeof (all_prg)); |
| 331 | /* Find the totals for this execution. */ |
| 332 | memset (&this_prg, 0, sizeof (this_prg)); |
| 333 | for (gi_ptr = gcov_list; gi_ptr; gi_ptr = gi_ptr->next) |
| 334 | { |
| 335 | crc32 = crc32_unsigned (crc32, gi_ptr->stamp); |
| 336 | crc32 = crc32_unsigned (crc32, gi_ptr->n_functions); |
| 337 | |
| 338 | for (f_ix = 0; (unsigned)f_ix != gi_ptr->n_functions; f_ix++) |
| 339 | { |
| 340 | gfi_ptr = gi_ptr->functions[f_ix]; |
| 341 | |
| 342 | if (gfi_ptr && gfi_ptr->key != gi_ptr) |
| 343 | gfi_ptr = 0; |
| 344 | |
| 345 | crc32 = crc32_unsigned (crc32, gfi_ptr ? gfi_ptr->cfg_checksum : 0); |
| 346 | crc32 = crc32_unsigned (crc32, |
| 347 | gfi_ptr ? gfi_ptr->lineno_checksum : 0); |
| 348 | if (!gfi_ptr) |
| 349 | continue; |
| 350 | |
| 351 | ci_ptr = gfi_ptr->ctrs; |
| 352 | for (t_ix = 0; t_ix != GCOV_COUNTERS_SUMMABLE; t_ix++) |
| 353 | { |
| 354 | if (!gi_ptr->merge[t_ix]) |
| 355 | continue; |
| 356 | |
| 357 | cs_ptr = &this_prg.ctrs[t_ix]; |
| 358 | cs_ptr->num += ci_ptr->num; |
| 359 | crc32 = crc32_unsigned (crc32, ci_ptr->num); |
| 360 | |
| 361 | for (c_num = 0; c_num < ci_ptr->num; c_num++) |
| 362 | { |
| 363 | cs_ptr->sum_all += ci_ptr->values[c_num]; |
| 364 | if (cs_ptr->run_max < ci_ptr->values[c_num]) |
| 365 | cs_ptr->run_max = ci_ptr->values[c_num]; |
| 366 | } |
| 367 | ci_ptr++; |
| 368 | } |
| 369 | } |
| 370 | } |
| 371 | |
| 372 | #ifndef __COREBOOT__ |
| 373 | { |
| 374 | /* Check if the level of dirs to strip off specified. */ |
| 375 | char *tmp = getenv("GCOV_PREFIX_STRIP"); |
| 376 | if (tmp) |
| 377 | { |
| 378 | gcov_prefix_strip = atoi (tmp); |
| 379 | /* Do not consider negative values. */ |
| 380 | if (gcov_prefix_strip < 0) |
| 381 | gcov_prefix_strip = 0; |
| 382 | } |
| 383 | } |
| 384 | |
| 385 | /* Get file name relocation prefix. Non-absolute values are ignored. */ |
| 386 | gcov_prefix = getenv("GCOV_PREFIX"); |
| 387 | if (gcov_prefix) |
| 388 | { |
| 389 | prefix_length = strlen(gcov_prefix); |
| 390 | |
| 391 | /* Remove an unnecessary trailing '/' */ |
| 392 | if (IS_DIR_SEPARATOR (gcov_prefix[prefix_length - 1])) |
| 393 | prefix_length--; |
| 394 | } |
| 395 | else |
| 396 | #endif |
| 397 | prefix_length = 0; |
| 398 | |
| 399 | /* If no prefix was specified and a prefix stip, then we assume |
| 400 | relative. */ |
| 401 | if (gcov_prefix_strip != 0 && prefix_length == 0) |
| 402 | { |
| 403 | gcov_prefix = "."; |
| 404 | prefix_length = 1; |
| 405 | } |
| 406 | /* Allocate and initialize the filename scratch space plus one. */ |
| 407 | gi_filename = (char *) alloca (prefix_length + gcov_max_filename + 2); |
| 408 | if (prefix_length) |
| 409 | memcpy (gi_filename, gcov_prefix, prefix_length); |
| 410 | gi_filename_up = gi_filename + prefix_length; |
| 411 | |
| 412 | /* Now merge each file. */ |
| 413 | for (gi_ptr = gcov_list; gi_ptr; gi_ptr = gi_ptr->next) |
| 414 | { |
| 415 | unsigned n_counts; |
| 416 | struct gcov_summary prg; /* summary for this object over all |
| 417 | program. */ |
| 418 | struct gcov_ctr_summary *cs_prg, *cs_tprg, *cs_all; |
| 419 | int error = 0; |
| 420 | gcov_unsigned_t tag, length; |
| 421 | gcov_position_t summary_pos = 0; |
| 422 | gcov_position_t eof_pos = 0; |
| 423 | const char *fname, *s; |
| 424 | struct gcov_fn_buffer *fn_buffer = 0; |
| 425 | struct gcov_fn_buffer **fn_tail = &fn_buffer; |
| 426 | |
| 427 | fname = gi_ptr->filename; |
| 428 | |
| 429 | /* Avoid to add multiple drive letters into combined path. */ |
| 430 | if (prefix_length != 0 && HAS_DRIVE_SPEC(fname)) |
| 431 | fname += 2; |
| 432 | |
| 433 | /* Build relocated filename, stripping off leading |
| 434 | directories from the initial filename if requested. */ |
| 435 | if (gcov_prefix_strip > 0) |
| 436 | { |
| 437 | int level = 0; |
| 438 | s = fname; |
| 439 | if (IS_DIR_SEPARATOR(*s)) |
| 440 | ++s; |
| 441 | |
| 442 | /* Skip selected directory levels. */ |
| 443 | for (; (*s != '\0') && (level < gcov_prefix_strip); s++) |
| 444 | if (IS_DIR_SEPARATOR(*s)) |
| 445 | { |
| 446 | fname = s; |
| 447 | level++; |
| 448 | } |
| 449 | } |
| 450 | |
| 451 | /* Update complete filename with stripped original. */ |
| 452 | if (prefix_length != 0 && !IS_DIR_SEPARATOR (*fname)) |
| 453 | { |
| 454 | /* If prefix is given, add directory separator. */ |
| 455 | strcpy (gi_filename_up, "/"); |
| 456 | strcpy (gi_filename_up + 1, fname); |
| 457 | } |
| 458 | else |
| 459 | strcpy (gi_filename_up, fname); |
| 460 | |
| 461 | if (!gcov_open (gi_filename)) |
| 462 | { |
| 463 | /* Open failed likely due to missed directory. |
| 464 | Create directory and retry to open file. */ |
| 465 | if (create_file_directory (gi_filename)) |
| 466 | { |
| 467 | fprintf (stderr, "profiling:%s:Skip\n", gi_filename); |
| 468 | continue; |
| 469 | } |
| 470 | if (!gcov_open (gi_filename)) |
| 471 | { |
| 472 | fprintf (stderr, "profiling:%s:Cannot open\n", gi_filename); |
| 473 | continue; |
| 474 | } |
| 475 | } |
| 476 | |
| 477 | tag = gcov_read_unsigned (); |
| 478 | if (tag) |
| 479 | { |
| 480 | /* Merge data from file. */ |
| 481 | if (tag != GCOV_DATA_MAGIC) |
| 482 | { |
| 483 | fprintf (stderr, "profiling:%s:Not a gcov data file\n", |
| 484 | gi_filename); |
| 485 | goto read_fatal; |
| 486 | } |
| 487 | length = gcov_read_unsigned (); |
| 488 | if (!gcov_version (gi_ptr, length, gi_filename)) |
| 489 | goto read_fatal; |
| 490 | |
| 491 | length = gcov_read_unsigned (); |
| 492 | if (length != gi_ptr->stamp) |
| 493 | /* Read from a different compilation. Overwrite the file. */ |
| 494 | goto rewrite; |
| 495 | |
| 496 | /* Look for program summary. */ |
| 497 | for (f_ix = 0;;) |
| 498 | { |
| 499 | struct gcov_summary tmp; |
| 500 | |
| 501 | eof_pos = gcov_position (); |
| 502 | tag = gcov_read_unsigned (); |
| 503 | if (tag != GCOV_TAG_PROGRAM_SUMMARY) |
| 504 | break; |
| 505 | |
| 506 | f_ix--; |
| 507 | length = gcov_read_unsigned (); |
| 508 | if (length != GCOV_TAG_SUMMARY_LENGTH) |
| 509 | goto read_mismatch; |
| 510 | gcov_read_summary (&tmp); |
| 511 | if ((error = gcov_is_error ())) |
| 512 | goto read_error; |
| 513 | if (summary_pos || tmp.checksum != crc32) |
| 514 | goto next_summary; |
| 515 | |
| 516 | for (t_ix = 0; t_ix != GCOV_COUNTERS_SUMMABLE; t_ix++) |
| 517 | if (tmp.ctrs[t_ix].num != this_prg.ctrs[t_ix].num) |
| 518 | goto next_summary; |
| 519 | prg = tmp; |
| 520 | summary_pos = eof_pos; |
| 521 | |
| 522 | next_summary:; |
| 523 | } |
| 524 | |
| 525 | /* Merge execution counts for each function. */ |
| 526 | for (f_ix = 0; (unsigned)f_ix != gi_ptr->n_functions; |
| 527 | f_ix++, tag = gcov_read_unsigned ()) |
| 528 | { |
| 529 | gfi_ptr = gi_ptr->functions[f_ix]; |
| 530 | |
| 531 | if (tag != GCOV_TAG_FUNCTION) |
| 532 | goto read_mismatch; |
| 533 | |
| 534 | length = gcov_read_unsigned (); |
| 535 | if (!length) |
| 536 | /* This function did not appear in the other program. |
| 537 | We have nothing to merge. */ |
| 538 | continue; |
| 539 | |
| 540 | if (length != GCOV_TAG_FUNCTION_LENGTH) |
| 541 | goto read_mismatch; |
| 542 | |
| 543 | if (!gfi_ptr || gfi_ptr->key != gi_ptr) |
| 544 | { |
| 545 | /* This function appears in the other program. We |
| 546 | need to buffer the information in order to write |
| 547 | it back out -- we'll be inserting data before |
| 548 | this point, so cannot simply keep the data in the |
| 549 | file. */ |
| 550 | fn_tail = buffer_fn_data (gi_filename, |
| 551 | gi_ptr, fn_tail, f_ix); |
| 552 | if (!fn_tail) |
| 553 | goto read_mismatch; |
| 554 | continue; |
| 555 | } |
| 556 | |
| 557 | length = gcov_read_unsigned (); |
| 558 | if (length != gfi_ptr->ident) |
| 559 | goto read_mismatch; |
| 560 | |
| 561 | length = gcov_read_unsigned (); |
| 562 | if (length != gfi_ptr->lineno_checksum) |
| 563 | goto read_mismatch; |
| 564 | |
| 565 | length = gcov_read_unsigned (); |
| 566 | if (length != gfi_ptr->cfg_checksum) |
| 567 | goto read_mismatch; |
| 568 | |
| 569 | ci_ptr = gfi_ptr->ctrs; |
| 570 | for (t_ix = 0; t_ix < GCOV_COUNTERS; t_ix++) |
| 571 | { |
| 572 | gcov_merge_fn merge = gi_ptr->merge[t_ix]; |
| 573 | |
| 574 | if (!merge) |
| 575 | continue; |
| 576 | |
| 577 | tag = gcov_read_unsigned (); |
| 578 | length = gcov_read_unsigned (); |
| 579 | if (tag != GCOV_TAG_FOR_COUNTER (t_ix) |
| 580 | || length != GCOV_TAG_COUNTER_LENGTH (ci_ptr->num)) |
| 581 | goto read_mismatch; |
| 582 | (*merge) (ci_ptr->values, ci_ptr->num); |
| 583 | ci_ptr++; |
| 584 | } |
| 585 | if ((error = gcov_is_error ())) |
| 586 | goto read_error; |
| 587 | } |
| 588 | |
| 589 | if (tag) |
| 590 | { |
| 591 | read_mismatch:; |
| 592 | fprintf (stderr, "profiling:%s:Merge mismatch for %s %u\n", |
| 593 | gi_filename, f_ix >= 0 ? "function" : "summary", |
| 594 | f_ix < 0 ? -1 - f_ix : f_ix); |
| 595 | goto read_fatal; |
| 596 | } |
| 597 | } |
| 598 | goto rewrite; |
| 599 | |
| 600 | read_error:; |
| 601 | fprintf (stderr, "profiling:%s:%s merging\n", gi_filename, |
| 602 | error < 0 ? "Overflow": "Error"); |
| 603 | |
| 604 | goto read_fatal; |
| 605 | |
| 606 | rewrite:; |
| 607 | gcov_rewrite (); |
| 608 | if (!summary_pos) |
| 609 | { |
| 610 | memset (&prg, 0, sizeof (prg)); |
| 611 | summary_pos = eof_pos; |
| 612 | } |
| 613 | |
| 614 | /* Merge the summaries. */ |
| 615 | for (t_ix = 0; t_ix < GCOV_COUNTERS_SUMMABLE; t_ix++) |
| 616 | { |
| 617 | cs_prg = &prg.ctrs[t_ix]; |
| 618 | cs_tprg = &this_prg.ctrs[t_ix]; |
| 619 | cs_all = &all_prg.ctrs[t_ix]; |
| 620 | |
| 621 | if (gi_ptr->merge[t_ix]) |
| 622 | { |
| 623 | if (!cs_prg->runs++) |
| 624 | cs_prg->num = cs_tprg->num; |
| 625 | cs_prg->sum_all += cs_tprg->sum_all; |
| 626 | if (cs_prg->run_max < cs_tprg->run_max) |
| 627 | cs_prg->run_max = cs_tprg->run_max; |
| 628 | cs_prg->sum_max += cs_tprg->run_max; |
| 629 | } |
| 630 | else if (cs_prg->runs) |
| 631 | goto read_mismatch; |
| 632 | |
| 633 | if (!cs_all->runs && cs_prg->runs) |
| 634 | memcpy (cs_all, cs_prg, sizeof (*cs_all)); |
| 635 | else if (!all_prg.checksum |
| 636 | && (!GCOV_LOCKED || cs_all->runs == cs_prg->runs) |
| 637 | && memcmp (cs_all, cs_prg, sizeof (*cs_all))) |
| 638 | { |
| 639 | fprintf (stderr, "profiling:%s:Invocation mismatch - some data files may have been removed%s\n", |
| 640 | gi_filename, GCOV_LOCKED |
| 641 | ? "" : " or concurrently updated without locking support"); |
| 642 | all_prg.checksum = ~0u; |
| 643 | } |
| 644 | } |
| 645 | |
| 646 | prg.checksum = crc32; |
| 647 | |
| 648 | /* Write out the data. */ |
| 649 | if (!eof_pos) |
| 650 | { |
| 651 | gcov_write_tag_length (GCOV_DATA_MAGIC, GCOV_VERSION); |
| 652 | gcov_write_unsigned (gi_ptr->stamp); |
| 653 | } |
| 654 | |
| 655 | if (summary_pos) |
| 656 | gcov_seek (summary_pos); |
| 657 | |
| 658 | /* Generate whole program statistics. */ |
| 659 | gcov_write_summary (GCOV_TAG_PROGRAM_SUMMARY, &prg); |
| 660 | |
| 661 | if (summary_pos < eof_pos) |
| 662 | gcov_seek (eof_pos); |
| 663 | |
| 664 | /* Write execution counts for each function. */ |
| 665 | for (f_ix = 0; (unsigned)f_ix != gi_ptr->n_functions; f_ix++) |
| 666 | { |
| 667 | unsigned buffered = 0; |
| 668 | |
| 669 | if (fn_buffer && fn_buffer->fn_ix == (unsigned)f_ix) |
| 670 | { |
| 671 | /* Buffered data from another program. */ |
| 672 | buffered = 1; |
| 673 | gfi_ptr = &fn_buffer->info; |
| 674 | length = GCOV_TAG_FUNCTION_LENGTH; |
| 675 | } |
| 676 | else |
| 677 | { |
| 678 | gfi_ptr = gi_ptr->functions[f_ix]; |
| 679 | if (gfi_ptr && gfi_ptr->key == gi_ptr) |
| 680 | length = GCOV_TAG_FUNCTION_LENGTH; |
| 681 | else |
| 682 | length = 0; |
| 683 | } |
| 684 | |
| 685 | gcov_write_tag_length (GCOV_TAG_FUNCTION, length); |
| 686 | if (!length) |
| 687 | continue; |
| 688 | |
| 689 | gcov_write_unsigned (gfi_ptr->ident); |
| 690 | gcov_write_unsigned (gfi_ptr->lineno_checksum); |
| 691 | gcov_write_unsigned (gfi_ptr->cfg_checksum); |
| 692 | |
| 693 | ci_ptr = gfi_ptr->ctrs; |
| 694 | for (t_ix = 0; t_ix < GCOV_COUNTERS; t_ix++) |
| 695 | { |
| 696 | if (!gi_ptr->merge[t_ix]) |
| 697 | continue; |
| 698 | |
| 699 | n_counts = ci_ptr->num; |
| 700 | gcov_write_tag_length (GCOV_TAG_FOR_COUNTER (t_ix), |
| 701 | GCOV_TAG_COUNTER_LENGTH (n_counts)); |
| 702 | gcov_type *c_ptr = ci_ptr->values; |
| 703 | while (n_counts--) |
| 704 | gcov_write_counter (*c_ptr++); |
| 705 | ci_ptr++; |
| 706 | } |
| 707 | if (buffered) |
| 708 | fn_buffer = free_fn_data (gi_ptr, fn_buffer, GCOV_COUNTERS); |
| 709 | } |
| 710 | |
| 711 | gcov_write_unsigned (0); |
| 712 | |
| 713 | read_fatal:; |
| 714 | while (fn_buffer) |
| 715 | fn_buffer = free_fn_data (gi_ptr, fn_buffer, GCOV_COUNTERS); |
| 716 | |
| 717 | if ((error = gcov_close ())) |
| 718 | fprintf (stderr, error < 0 ? |
| 719 | "profiling:%s:Overflow writing\n" : |
| 720 | "profiling:%s:Error writing\n", |
| 721 | gi_filename); |
| 722 | } |
| 723 | } |
| 724 | |
| 725 | /* Add a new object file onto the bb chain. Invoked automatically |
| 726 | when running an object file's global ctors. */ |
| 727 | |
| 728 | void |
| 729 | __gcov_init (struct gcov_info *info) |
| 730 | { |
| 731 | if (!info->version || !info->n_functions) |
| 732 | return; |
| 733 | if (gcov_version (info, info->version, 0)) |
| 734 | { |
| 735 | size_t filename_length = strlen(info->filename); |
| 736 | |
| 737 | /* Refresh the longest file name information */ |
| 738 | if (filename_length > gcov_max_filename) |
| 739 | gcov_max_filename = filename_length; |
| 740 | |
| 741 | #ifndef __COREBOOT__ |
| 742 | if (!gcov_list) |
| 743 | atexit (gcov_exit); |
| 744 | #endif |
| 745 | |
| 746 | info->next = gcov_list; |
| 747 | gcov_list = info; |
| 748 | } |
| 749 | info->version = 0; |
| 750 | } |
| 751 | |
| 752 | /* Called before fork or exec - write out profile information gathered so |
| 753 | far and reset it to zero. This avoids duplication or loss of the |
| 754 | profile information gathered so far. */ |
| 755 | |
| 756 | void |
| 757 | __gcov_flush (void) |
| 758 | { |
| 759 | const struct gcov_info *gi_ptr; |
| 760 | |
| 761 | gcov_exit (); |
| 762 | for (gi_ptr = gcov_list; gi_ptr; gi_ptr = gi_ptr->next) |
| 763 | { |
| 764 | unsigned f_ix; |
| 765 | |
| 766 | for (f_ix = 0; f_ix < gi_ptr->n_functions; f_ix++) |
| 767 | { |
| 768 | unsigned t_ix; |
| 769 | const struct gcov_fn_info *gfi_ptr = gi_ptr->functions[f_ix]; |
| 770 | |
| 771 | if (!gfi_ptr || gfi_ptr->key != gi_ptr) |
| 772 | continue; |
| 773 | const struct gcov_ctr_info *ci_ptr = gfi_ptr->ctrs; |
| 774 | for (t_ix = 0; t_ix != GCOV_COUNTERS; t_ix++) |
| 775 | { |
| 776 | if (!gi_ptr->merge[t_ix]) |
| 777 | continue; |
| 778 | |
| 779 | memset (ci_ptr->values, 0, sizeof (gcov_type) * ci_ptr->num); |
| 780 | ci_ptr++; |
| 781 | } |
| 782 | } |
| 783 | } |
| 784 | } |
| 785 | |
| 786 | #endif /* L_gcov */ |
| 787 | |
| 788 | #ifdef L_gcov_merge_add |
| 789 | /* The profile merging function that just adds the counters. It is given |
| 790 | an array COUNTERS of N_COUNTERS old counters and it reads the same number |
| 791 | of counters from the gcov file. */ |
| 792 | void |
| 793 | __gcov_merge_add (gcov_type *counters, unsigned n_counters) |
| 794 | { |
| 795 | for (; n_counters; counters++, n_counters--) |
| 796 | *counters += gcov_read_counter (); |
| 797 | } |
| 798 | #endif /* L_gcov_merge_add */ |
| 799 | |
| 800 | #ifdef L_gcov_merge_ior |
| 801 | /* The profile merging function that just adds the counters. It is given |
| 802 | an array COUNTERS of N_COUNTERS old counters and it reads the same number |
| 803 | of counters from the gcov file. */ |
| 804 | void |
| 805 | __gcov_merge_ior (gcov_type *counters, unsigned n_counters) |
| 806 | { |
| 807 | for (; n_counters; counters++, n_counters--) |
| 808 | *counters |= gcov_read_counter (); |
| 809 | } |
| 810 | #endif |
| 811 | |
| 812 | #ifdef L_gcov_merge_single |
| 813 | /* The profile merging function for choosing the most common value. |
Ronald G. Minnich | 850793f | 2013-01-13 17:22:42 -0600 | [diff] [blame] | 814 | * It is given an array COUNTERS of N_COUNTERS old counters and it |
| 815 | * reads the same number of counters from the gcov file. The counters |
| 816 | * are split into 3-tuples where the members of the tuple have |
| 817 | * meanings: |
| 818 | * |
| 819 | * -- the stored candidate on the most common value of the measured entity |
| 820 | * -- counter |
Stefan Reinauer | f572e1e | 2013-01-16 09:47:54 -0800 | [diff] [blame] | 821 | * -- total number of evaluations of the value |
Ronald G. Minnich | 850793f | 2013-01-13 17:22:42 -0600 | [diff] [blame] | 822 | */ |
Stefan Reinauer | d37ab45 | 2012-12-18 16:23:28 -0800 | [diff] [blame] | 823 | void |
| 824 | __gcov_merge_single (gcov_type *counters, unsigned n_counters) |
| 825 | { |
| 826 | unsigned i, n_measures; |
| 827 | gcov_type value, counter, all; |
| 828 | |
| 829 | gcc_assert (!(n_counters % 3)); |
| 830 | n_measures = n_counters / 3; |
| 831 | for (i = 0; i < n_measures; i++, counters += 3) |
| 832 | { |
| 833 | value = gcov_read_counter (); |
| 834 | counter = gcov_read_counter (); |
| 835 | all = gcov_read_counter (); |
| 836 | |
| 837 | if (counters[0] == value) |
| 838 | counters[1] += counter; |
| 839 | else if (counter > counters[1]) |
| 840 | { |
| 841 | counters[0] = value; |
| 842 | counters[1] = counter - counters[1]; |
| 843 | } |
| 844 | else |
| 845 | counters[1] -= counter; |
| 846 | counters[2] += all; |
| 847 | } |
| 848 | } |
| 849 | #endif /* L_gcov_merge_single */ |
| 850 | |
| 851 | #ifdef L_gcov_merge_delta |
| 852 | /* The profile merging function for choosing the most common |
Ronald G. Minnich | 850793f | 2013-01-13 17:22:42 -0600 | [diff] [blame] | 853 | * difference between two consecutive evaluations of the value. It is |
| 854 | * given an array COUNTERS of N_COUNTERS old counters and it reads the |
| 855 | * same number of counters from the gcov file. The counters are split |
| 856 | * into 4-tuples where the members of the tuple have meanings: |
| 857 | * |
| 858 | * -- the last value of the measured entity |
| 859 | * -- the stored candidate on the most common difference |
| 860 | * -- counter |
Stefan Reinauer | f572e1e | 2013-01-16 09:47:54 -0800 | [diff] [blame] | 861 | * -- total number of evaluations of the value |
Ronald G. Minnich | 850793f | 2013-01-13 17:22:42 -0600 | [diff] [blame] | 862 | */ |
Stefan Reinauer | d37ab45 | 2012-12-18 16:23:28 -0800 | [diff] [blame] | 863 | void |
| 864 | __gcov_merge_delta (gcov_type *counters, unsigned n_counters) |
| 865 | { |
| 866 | unsigned i, n_measures; |
| 867 | gcov_type value, counter, all; |
| 868 | |
| 869 | gcc_assert (!(n_counters % 4)); |
| 870 | n_measures = n_counters / 4; |
| 871 | for (i = 0; i < n_measures; i++, counters += 4) |
| 872 | { |
| 873 | /* last = */ gcov_read_counter (); |
| 874 | value = gcov_read_counter (); |
| 875 | counter = gcov_read_counter (); |
| 876 | all = gcov_read_counter (); |
| 877 | |
| 878 | if (counters[1] == value) |
| 879 | counters[2] += counter; |
| 880 | else if (counter > counters[2]) |
| 881 | { |
| 882 | counters[1] = value; |
| 883 | counters[2] = counter - counters[2]; |
| 884 | } |
| 885 | else |
| 886 | counters[2] -= counter; |
| 887 | counters[3] += all; |
| 888 | } |
| 889 | } |
| 890 | #endif /* L_gcov_merge_delta */ |
| 891 | |
| 892 | #ifdef L_gcov_interval_profiler |
| 893 | /* If VALUE is in interval <START, START + STEPS - 1>, then increases the |
| 894 | corresponding counter in COUNTERS. If the VALUE is above or below |
| 895 | the interval, COUNTERS[STEPS] or COUNTERS[STEPS + 1] is increased |
| 896 | instead. */ |
| 897 | |
| 898 | void |
| 899 | __gcov_interval_profiler (gcov_type *counters, gcov_type value, |
| 900 | int start, unsigned steps) |
| 901 | { |
| 902 | gcov_type delta = value - start; |
| 903 | if (delta < 0) |
| 904 | counters[steps + 1]++; |
| 905 | else if (delta >= steps) |
| 906 | counters[steps]++; |
| 907 | else |
| 908 | counters[delta]++; |
| 909 | } |
| 910 | #endif |
| 911 | |
| 912 | #ifdef L_gcov_pow2_profiler |
| 913 | /* If VALUE is a power of two, COUNTERS[1] is incremented. Otherwise |
| 914 | COUNTERS[0] is incremented. */ |
| 915 | |
| 916 | void |
| 917 | __gcov_pow2_profiler (gcov_type *counters, gcov_type value) |
| 918 | { |
| 919 | if (value & (value - 1)) |
| 920 | counters[0]++; |
| 921 | else |
| 922 | counters[1]++; |
| 923 | } |
| 924 | #endif |
| 925 | |
| 926 | /* Tries to determine the most common value among its inputs. Checks if the |
| 927 | value stored in COUNTERS[0] matches VALUE. If this is the case, COUNTERS[1] |
| 928 | is incremented. If this is not the case and COUNTERS[1] is not zero, |
| 929 | COUNTERS[1] is decremented. Otherwise COUNTERS[1] is set to one and |
| 930 | VALUE is stored to COUNTERS[0]. This algorithm guarantees that if this |
| 931 | function is called more than 50% of the time with one value, this value |
| 932 | will be in COUNTERS[0] in the end. |
| 933 | |
| 934 | In any case, COUNTERS[2] is incremented. */ |
| 935 | |
| 936 | static inline void |
| 937 | __gcov_one_value_profiler_body (gcov_type *counters, gcov_type value) |
| 938 | { |
| 939 | if (value == counters[0]) |
| 940 | counters[1]++; |
| 941 | else if (counters[1] == 0) |
| 942 | { |
| 943 | counters[1] = 1; |
| 944 | counters[0] = value; |
| 945 | } |
| 946 | else |
| 947 | counters[1]--; |
| 948 | counters[2]++; |
| 949 | } |
| 950 | |
| 951 | #ifdef L_gcov_one_value_profiler |
| 952 | void |
| 953 | __gcov_one_value_profiler (gcov_type *counters, gcov_type value) |
| 954 | { |
| 955 | __gcov_one_value_profiler_body (counters, value); |
| 956 | } |
| 957 | #endif |
| 958 | |
| 959 | #ifdef L_gcov_indirect_call_profiler |
| 960 | |
| 961 | /* By default, the C++ compiler will use function addresses in the |
| 962 | vtable entries. Setting TARGET_VTABLE_USES_DESCRIPTORS to nonzero |
| 963 | tells the compiler to use function descriptors instead. The value |
| 964 | of this macro says how many words wide the descriptor is (normally 2), |
| 965 | but it may be dependent on target flags. Since we do not have access |
| 966 | to the target flags here we just check to see if it is set and use |
| 967 | that to set VTABLE_USES_DESCRIPTORS to 0 or 1. |
| 968 | |
| 969 | It is assumed that the address of a function descriptor may be treated |
| 970 | as a pointer to a function. */ |
| 971 | |
| 972 | #ifdef TARGET_VTABLE_USES_DESCRIPTORS |
| 973 | #define VTABLE_USES_DESCRIPTORS 1 |
| 974 | #else |
| 975 | #define VTABLE_USES_DESCRIPTORS 0 |
| 976 | #endif |
| 977 | |
| 978 | /* Tries to determine the most common value among its inputs. */ |
| 979 | void |
| 980 | __gcov_indirect_call_profiler (gcov_type* counter, gcov_type value, |
| 981 | void* cur_func, void* callee_func) |
| 982 | { |
| 983 | /* If the C++ virtual tables contain function descriptors then one |
| 984 | function may have multiple descriptors and we need to dereference |
| 985 | the descriptors to see if they point to the same function. */ |
| 986 | if (cur_func == callee_func |
| 987 | || (VTABLE_USES_DESCRIPTORS && callee_func |
| 988 | && *(void **) cur_func == *(void **) callee_func)) |
| 989 | __gcov_one_value_profiler_body (counter, value); |
| 990 | } |
| 991 | #endif |
| 992 | |
| 993 | |
| 994 | #ifdef L_gcov_average_profiler |
| 995 | /* Increase corresponding COUNTER by VALUE. FIXME: Perhaps we want |
| 996 | to saturate up. */ |
| 997 | |
| 998 | void |
| 999 | __gcov_average_profiler (gcov_type *counters, gcov_type value) |
| 1000 | { |
| 1001 | counters[0] += value; |
| 1002 | counters[1] ++; |
| 1003 | } |
| 1004 | #endif |
| 1005 | |
| 1006 | #ifdef L_gcov_ior_profiler |
| 1007 | /* Increase corresponding COUNTER by VALUE. FIXME: Perhaps we want |
| 1008 | to saturate up. */ |
| 1009 | |
| 1010 | void |
| 1011 | __gcov_ior_profiler (gcov_type *counters, gcov_type value) |
| 1012 | { |
| 1013 | *counters |= value; |
| 1014 | } |
| 1015 | #endif |
| 1016 | |
| 1017 | #ifdef L_gcov_fork |
| 1018 | /* A wrapper for the fork function. Flushes the accumulated profiling data, so |
| 1019 | that they are not counted twice. */ |
| 1020 | |
| 1021 | pid_t |
| 1022 | __gcov_fork (void) |
| 1023 | { |
| 1024 | __gcov_flush (); |
| 1025 | return fork (); |
| 1026 | } |
| 1027 | #endif |
| 1028 | |
| 1029 | #ifdef L_gcov_execl |
| 1030 | /* A wrapper for the execl function. Flushes the accumulated profiling data, so |
| 1031 | that they are not lost. */ |
| 1032 | |
| 1033 | int |
| 1034 | __gcov_execl (const char *path, char *arg, ...) |
| 1035 | { |
| 1036 | va_list ap, aq; |
| 1037 | unsigned i, length; |
| 1038 | char **args; |
| 1039 | |
| 1040 | __gcov_flush (); |
| 1041 | |
| 1042 | va_start (ap, arg); |
| 1043 | va_copy (aq, ap); |
| 1044 | |
| 1045 | length = 2; |
| 1046 | while (va_arg (ap, char *)) |
| 1047 | length++; |
| 1048 | va_end (ap); |
| 1049 | |
| 1050 | args = (char **) alloca (length * sizeof (void *)); |
| 1051 | args[0] = arg; |
| 1052 | for (i = 1; i < length; i++) |
| 1053 | args[i] = va_arg (aq, char *); |
| 1054 | va_end (aq); |
| 1055 | |
| 1056 | return execv (path, args); |
| 1057 | } |
| 1058 | #endif |
| 1059 | |
| 1060 | #ifdef L_gcov_execlp |
| 1061 | /* A wrapper for the execlp function. Flushes the accumulated profiling data, so |
| 1062 | that they are not lost. */ |
| 1063 | |
| 1064 | int |
| 1065 | __gcov_execlp (const char *path, char *arg, ...) |
| 1066 | { |
| 1067 | va_list ap, aq; |
| 1068 | unsigned i, length; |
| 1069 | char **args; |
| 1070 | |
| 1071 | __gcov_flush (); |
| 1072 | |
| 1073 | va_start (ap, arg); |
| 1074 | va_copy (aq, ap); |
| 1075 | |
| 1076 | length = 2; |
| 1077 | while (va_arg (ap, char *)) |
| 1078 | length++; |
| 1079 | va_end (ap); |
| 1080 | |
| 1081 | args = (char **) alloca (length * sizeof (void *)); |
| 1082 | args[0] = arg; |
| 1083 | for (i = 1; i < length; i++) |
| 1084 | args[i] = va_arg (aq, char *); |
| 1085 | va_end (aq); |
| 1086 | |
| 1087 | return execvp (path, args); |
| 1088 | } |
| 1089 | #endif |
| 1090 | |
| 1091 | #ifdef L_gcov_execle |
| 1092 | /* A wrapper for the execle function. Flushes the accumulated profiling data, so |
| 1093 | that they are not lost. */ |
| 1094 | |
| 1095 | int |
| 1096 | __gcov_execle (const char *path, char *arg, ...) |
| 1097 | { |
| 1098 | va_list ap, aq; |
| 1099 | unsigned i, length; |
| 1100 | char **args; |
| 1101 | char **envp; |
| 1102 | |
| 1103 | __gcov_flush (); |
| 1104 | |
| 1105 | va_start (ap, arg); |
| 1106 | va_copy (aq, ap); |
| 1107 | |
| 1108 | length = 2; |
| 1109 | while (va_arg (ap, char *)) |
| 1110 | length++; |
| 1111 | va_end (ap); |
| 1112 | |
| 1113 | args = (char **) alloca (length * sizeof (void *)); |
| 1114 | args[0] = arg; |
| 1115 | for (i = 1; i < length; i++) |
| 1116 | args[i] = va_arg (aq, char *); |
| 1117 | envp = va_arg (aq, char **); |
| 1118 | va_end (aq); |
| 1119 | |
| 1120 | return execve (path, args, envp); |
| 1121 | } |
| 1122 | #endif |
| 1123 | |
| 1124 | #ifdef L_gcov_execv |
| 1125 | /* A wrapper for the execv function. Flushes the accumulated profiling data, so |
| 1126 | that they are not lost. */ |
| 1127 | |
| 1128 | int |
| 1129 | __gcov_execv (const char *path, char *const argv[]) |
| 1130 | { |
| 1131 | __gcov_flush (); |
| 1132 | return execv (path, argv); |
| 1133 | } |
| 1134 | #endif |
| 1135 | |
| 1136 | #ifdef L_gcov_execvp |
| 1137 | /* A wrapper for the execvp function. Flushes the accumulated profiling data, so |
| 1138 | that they are not lost. */ |
| 1139 | |
| 1140 | int |
| 1141 | __gcov_execvp (const char *path, char *const argv[]) |
| 1142 | { |
| 1143 | __gcov_flush (); |
| 1144 | return execvp (path, argv); |
| 1145 | } |
| 1146 | #endif |
| 1147 | |
| 1148 | #ifdef L_gcov_execve |
| 1149 | /* A wrapper for the execve function. Flushes the accumulated profiling data, so |
| 1150 | that they are not lost. */ |
| 1151 | |
| 1152 | int |
| 1153 | __gcov_execve (const char *path, char *const argv[], char *const envp[]) |
| 1154 | { |
| 1155 | __gcov_flush (); |
| 1156 | return execve (path, argv, envp); |
| 1157 | } |
| 1158 | #endif |
| 1159 | #endif /* inhibit_libc */ |