gcc/gcov-tool.cc

   1 /* Gcc offline profile processing tool support. */
   2 /* Copyright (C) 2014-2022 Free Software Foundation, Inc.
   3    Contributed by Rong Xu <xur@google.com>.
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 3, or (at your option) any later
  10 version.
  11
  12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 for more details.
  16
  17 Under Section 7 of GPL version 3, you are granted additional
  18 permissions described in the GCC Runtime Library Exception, version
  19 3.1, as published by the Free Software Foundation.
  20
  21 You should have received a copy of the GNU General Public License and
  22 a copy of the GCC Runtime Library Exception along with this program;
  23 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  24 <http://www.gnu.org/licenses/>.  */
  25
  26 #include "config.h"
  27 #include "system.h"
  28 #include "coretypes.h"
  29 #include "tm.h"
  30 #include "intl.h"
  31 #include "diagnostic.h"
  32 #include "version.h"
  33 #include "gcov-io.h"
  34 #include <stdlib.h>
  35 #include <stdio.h>
  36 #include <sys/stat.h>
  37 #include <unistd.h>
  38 #if HAVE_FTW_H
  39 #include <ftw.h>
  40 #endif
  41 #include <getopt.h>
  42
  43 extern struct gcov_info *gcov_profile_merge (struct gcov_info*,
  44                                              struct gcov_info*, int, int);
  45 extern struct gcov_info *gcov_profile_merge_stream (const char *, int, int);
  46 extern int gcov_profile_overlap (struct gcov_info*, struct gcov_info*);
  47 extern int gcov_profile_normalize (struct gcov_info*, gcov_type);
  48 extern int gcov_profile_scale (struct gcov_info*, float, int, int);
  49 extern struct gcov_info* gcov_read_profile_dir (const char*, int);
  50 extern void gcov_do_dump (struct gcov_info *, int, int);
  51 extern const char *gcov_get_filename (struct gcov_info *list);
  52 extern void gcov_set_verbose (void);
  53
  54 /* Set to verbose output mode.  */
  55 static bool verbose;
  56
  57 #if HAVE_FTW_H
  58
  59 /* Remove file NAME if it has a gcda suffix. */
  60
  61 static int
  62 unlink_gcda_file (const char *name,
  63                   const struct stat *status ATTRIBUTE_UNUSED,
  64                   int type ATTRIBUTE_UNUSED,
  65                   struct FTW *ftwbuf ATTRIBUTE_UNUSED)
  66 {
  67   int ret = 0;
  68   int len = strlen (name);
  69   int len1 = strlen (GCOV_DATA_SUFFIX);
  70
  71   if (len > len1 && !strncmp (len -len1 + name, GCOV_DATA_SUFFIX, len1))
  72     ret = remove (name);
  73
  74   if (ret)
  75     fatal_error (input_location, "error in removing %s", name);
  76
  77   return ret;
  78 }
  79 #endif
  80
  81 /* Remove the gcda files in PATH recursively.  */
  82
  83 static int
  84 unlink_profile_dir (const char *path ATTRIBUTE_UNUSED)
  85 {
  86 #if HAVE_FTW_H
  87     return nftw(path, unlink_gcda_file, 64, FTW_DEPTH | FTW_PHYS);
  88 #else
  89     return -1;
  90 #endif
  91 }
  92
  93 /* Output GCOV_INFO lists PROFILE to directory OUT. Note that
  94    we will remove all the gcda files in OUT.  */
  95
  96 static void
  97 gcov_output_files (const char *out, struct gcov_info *profile)
  98 {
  99   char *pwd;
 100   int ret;
 101
 102   /* Try to make directory if it doesn't already exist.  */
 103   if (access (out, F_OK) == -1)
 104     {
 105       if (mkdir (out, S_IRWXU | S_IRWXG | S_IRWXO) == -1 && errno != EEXIST)
 106         fatal_error (input_location, "Cannot make directory %s", out);
 107     } else
 108       unlink_profile_dir (out);
 109
 110   /* Output new profile.  */
 111   pwd = getcwd (NULL, 0);
 112
 113   if (pwd == NULL)
 114     fatal_error (input_location, "Cannot get current directory name");
 115
 116   ret = chdir (out);
 117   if (ret)
 118     fatal_error (input_location, "Cannot change directory to %s", out);
 119
 120   /* Verify that output file does not exist (either was removed by
 121      unlink_profile_data or removed by user).  */
 122   const char *filename = gcov_get_filename (profile);
 123
 124   if (access (filename, F_OK) != -1)
 125     fatal_error (input_location, "output file %s already exists in folder %s",
 126                  filename, out);
 127
 128   gcov_do_dump (profile, 0, 0);
 129
 130   ret = chdir (pwd);
 131   if (ret)
 132     fatal_error (input_location, "Cannot change directory to %s", pwd);
 133
 134   free (pwd);
 135 }
 136
 137 /* Merging profile D1 and D2 with weight as W1 and W2, respectively.
 138    The result profile is written to directory OUT.
 139    Return 0 on success.  */
 140
 141 static int
 142 profile_merge (const char *d1, const char *d2, const char *out, int w1, int w2)
 143 {
 144   struct gcov_info *d1_profile;
 145   struct gcov_info *d2_profile;
 146   struct gcov_info *merged_profile;
 147
 148   d1_profile = gcov_read_profile_dir (d1, 0);
 149   d2_profile = gcov_read_profile_dir (d2, 0);
 150
 151   /* The actual merge: we overwrite to d1_profile.  */
 152   merged_profile = gcov_profile_merge (d1_profile, d2_profile, w1, w2);
 153
 154   if (merged_profile)
 155     gcov_output_files (out, merged_profile);
 156   else if (verbose)
 157     fnotice (stdout, "no profile files were merged\n");
 158
 159   return 0;
 160 }
 161
 162 /* Usage message for profile merge.  */
 163
 164 static void
 165 print_merge_usage_message (int error_p)
 166 {
 167   FILE *file = error_p ? stderr : stdout;
 168
 169   fnotice (file, "  merge [options] <dir1> <dir2>         Merge coverage file contents\n");
 170   fnotice (file, "    -o, --output <dir>                  Output directory\n");
 171   fnotice (file, "    -v, --verbose                       Verbose mode\n");
 172   fnotice (file, "    -w, --weight <w1,w2>                Set weights (float point values)\n");
 173 }
 174
 175 static const struct option merge_options[] =
 176 {
 177   { "verbose",                no_argument,       NULL, 'v' },
 178   { "output",                 required_argument, NULL, 'o' },
 179   { "weight",                 required_argument, NULL, 'w' },
 180   { 0, 0, 0, 0 }
 181 };
 182
 183 /* Print merge usage and exit.  */
 184
 185 static void ATTRIBUTE_NORETURN
 186 merge_usage (void)
 187 {
 188   fnotice (stderr, "Merge subcomand usage:");
 189   print_merge_usage_message (true);
 190   exit (FATAL_EXIT_CODE);
 191 }
 192
 193 /* Driver for profile merge sub-command.  */
 194
 195 static int
 196 do_merge (int argc, char **argv)
 197 {
 198   int opt;
 199   const char *output_dir = 0;
 200   int w1 = 1, w2 = 1;
 201
 202   optind = 0;
 203   while ((opt = getopt_long (argc, argv, "vo:w:", merge_options, NULL)) != -1)
 204     {
 205       switch (opt)
 206         {
 207         case 'v':
 208           verbose = true;
 209           gcov_set_verbose ();
 210           break;
 211         case 'o':
 212           output_dir = optarg;
 213           break;
 214         case 'w':
 215           sscanf (optarg, "%d,%d", &w1, &w2);
 216           if (w1 < 0 || w2 < 0)
 217             fatal_error (input_location, "weights need to be non-negative");
 218           break;
 219         default:
 220           merge_usage ();
 221         }
 222     }
 223
 224   if (output_dir == NULL)
 225     output_dir = "merged_profile";
 226
 227   if (argc - optind != 2)
 228     merge_usage ();
 229
 230   return profile_merge (argv[optind], argv[optind+1], output_dir, w1, w2);
 231 }
 232
 233 /* Usage message for profile merge-stream.  */
 234
 235 static void
 236 print_merge_stream_usage_message (int error_p)
 237 {
 238   FILE *file = error_p ? stderr : stdout;
 239
 240   fnotice (file, "  merge-stream [options] [<file>]       Merge coverage stream file (or stdin)\n"
 241                  "                                        and coverage file contents\n");
 242   fnotice (file, "    -v, --verbose                       Verbose mode\n");
 243   fnotice (file, "    -w, --weight <w1,w2>                Set weights (float point values)\n");
 244 }
 245
 246 static const struct option merge_stream_options[] =
 247 {
 248   { "verbose",                no_argument,       NULL, 'v' },
 249   { "weight",                 required_argument, NULL, 'w' },
 250   { 0, 0, 0, 0 }
 251 };
 252
 253 /* Print merge-stream usage and exit.  */
 254
 255 static void ATTRIBUTE_NORETURN
 256 merge_stream_usage (void)
 257 {
 258   fnotice (stderr, "Merge-stream subcomand usage:");
 259   print_merge_stream_usage_message (true);
 260   exit (FATAL_EXIT_CODE);
 261 }
 262
 263 /* Driver for profile merge-stream sub-command.  */
 264
 265 static int
 266 do_merge_stream (int argc, char **argv)
 267 {
 268   int opt;
 269   int w1 = 1, w2 = 1;
 270   struct gcov_info *merged_profile;
 271
 272   optind = 0;
 273   while ((opt = getopt_long (argc, argv, "vw:",
 274                              merge_stream_options, NULL)) != -1)
 275     {
 276       switch (opt)
 277         {
 278         case 'v':
 279           verbose = true;
 280           gcov_set_verbose ();
 281           break;
 282         case 'w':
 283           sscanf (optarg, "%d,%d", &w1, &w2);
 284           if (w1 < 0 || w2 < 0)
 285             fatal_error (input_location, "weights need to be non-negative");
 286           break;
 287         default:
 288           merge_stream_usage ();
 289         }
 290     }
 291
 292   if (argc - optind > 1)
 293     merge_stream_usage ();
 294
 295   merged_profile = gcov_profile_merge_stream (argv[optind], w1, w2);
 296
 297   if (merged_profile)
 298     gcov_do_dump (merged_profile, 0, -1);
 299   else if (verbose)
 300     fnotice (stdout, "no profile files were merged\n");
 301
 302   return 0;
 303 }
 304
 305 /* If N_VAL is no-zero, normalize the profile by setting the largest counter
 306    counter value to N_VAL and scale others counters proportionally.
 307    Otherwise, multiply the all counters by SCALE.  */
 308
 309 static int
 310 profile_rewrite (const char *d1, const char *out, int64_t n_val,
 311                  float scale, int n, int d)
 312 {
 313   struct gcov_info * d1_profile;
 314
 315   d1_profile = gcov_read_profile_dir (d1, 0);
 316   if (!d1_profile)
 317     return 1;
 318
 319   if (n_val)
 320     gcov_profile_normalize (d1_profile, (gcov_type) n_val);
 321   else
 322     gcov_profile_scale (d1_profile, scale, n, d);
 323
 324   gcov_output_files (out, d1_profile);
 325   return 0;
 326 }
 327
 328 /* Usage function for profile rewrite.  */
 329
 330 static void
 331 print_rewrite_usage_message (int error_p)
 332 {
 333   FILE *file = error_p ? stderr : stdout;
 334
 335   fnotice (file, "  rewrite [options] <dir>               Rewrite coverage file contents\n");
 336   fnotice (file, "    -n, --normalize <int64_t>           Normalize the profile\n");
 337   fnotice (file, "    -o, --output <dir>                  Output directory\n");
 338   fnotice (file, "    -s, --scale <float or simple-frac>  Scale the profile counters\n");
 339   fnotice (file, "    -v, --verbose                       Verbose mode\n");
 340 }
 341
 342 static const struct option rewrite_options[] =
 343 {
 344   { "verbose",                no_argument,       NULL, 'v' },
 345   { "output",                 required_argument, NULL, 'o' },
 346   { "scale",                  required_argument, NULL, 's' },
 347   { "normalize",              required_argument, NULL, 'n' },
 348   { 0, 0, 0, 0 }
 349 };
 350
 351 /* Print profile rewrite usage and exit.  */
 352
 353 static void ATTRIBUTE_NORETURN
 354 rewrite_usage (void)
 355 {
 356   fnotice (stderr, "Rewrite subcommand usage:");
 357   print_rewrite_usage_message (true);
 358   exit (FATAL_EXIT_CODE);
 359 }
 360
 361 /* Driver for profile rewrite sub-command. */
 362
 363 static int
 364 do_rewrite (int argc, char **argv)
 365 {
 366   int opt;
 367   int ret;
 368   const char *output_dir = 0;
 369   int64_t normalize_val = 0;
 370   float scale = 0.0;
 371   int numerator = 1;
 372   int denominator = 1;
 373   int do_scaling = 0;
 374
 375   optind = 0;
 376   while ((opt = getopt_long (argc, argv, "vo:s:n:", rewrite_options, NULL)) != -1)
 377     {
 378       switch (opt)
 379         {
 380         case 'v':
 381           verbose = true;
 382           gcov_set_verbose ();
 383           break;
 384         case 'o':
 385           output_dir = optarg;
 386           break;
 387         case 'n':
 388           if (!do_scaling)
 389 #if defined(INT64_T_IS_LONG)
 390             normalize_val = strtol (optarg, (char **)NULL, 10);
 391 #else
 392             normalize_val = strtoll (optarg, (char **)NULL, 10);
 393 #endif
 394           else
 395             fnotice (stderr, "scaling cannot co-exist with normalization,"
 396                 " skipping\n");
 397           break;
 398         case 's':
 399           ret = 0;
 400           do_scaling = 1;
 401           if (strstr (optarg, "/"))
 402             {
 403               ret = sscanf (optarg, "%d/%d", &numerator, &denominator);
 404               if (ret == 2)
 405                 {
 406                   if (numerator < 0 || denominator <= 0)
 407                     {
 408                       fnotice (stderr, "incorrect format in scaling, using 1/1\n");
 409                       denominator = 1;
 410                       numerator = 1;
 411                     }
 412                 }
 413             }
 414           if (ret != 2)
 415             {
 416               ret = sscanf (optarg, "%f", &scale);
 417               if (ret != 1)
 418                 fnotice (stderr, "incorrect format in scaling, using 1/1\n");
 419               else
 420                 denominator = 0;
 421             }
 422
 423           if (scale < 0.0)
 424             fatal_error (input_location, "scale needs to be non-negative");
 425
 426           if (normalize_val != 0)
 427             {
 428               fnotice (stderr, "normalization cannot co-exist with scaling\n");
 429               normalize_val = 0;
 430             }
 431           break;
 432         default:
 433           rewrite_usage ();
 434         }
 435     }
 436
 437   if (output_dir == NULL)
 438     output_dir = "rewrite_profile";
 439
 440   if (argc - optind == 1)
 441     {
 442       if (denominator > 0)
 443         ret = profile_rewrite (argv[optind],  output_dir, 0, 0.0, numerator, denominator);
 444       else
 445         ret = profile_rewrite (argv[optind],  output_dir, normalize_val, scale, 0, 0);
 446     }
 447   else
 448     rewrite_usage ();
 449
 450   return ret;
 451 }
 452
 453 /* Driver function to computer the overlap score b/w profile D1 and D2.
 454    Return 1 on error and 0 if OK.  */
 455
 456 static int
 457 profile_overlap (const char *d1, const char *d2)
 458 {
 459   struct gcov_info *d1_profile;
 460   struct gcov_info *d2_profile;
 461
 462   d1_profile = gcov_read_profile_dir (d1, 0);
 463   if (!d1_profile)
 464     return 1;
 465
 466   if (d2)
 467     {
 468       d2_profile = gcov_read_profile_dir (d2, 0);
 469       if (!d2_profile)
 470         return 1;
 471
 472       return gcov_profile_overlap (d1_profile, d2_profile);
 473     }
 474
 475   return 1;
 476 }
 477
 478 /* Usage message for profile overlap.  */
 479
 480 static void
 481 print_overlap_usage_message (int error_p)
 482 {
 483   FILE *file = error_p ? stderr : stdout;
 484
 485   fnotice (file, "  overlap [options] <dir1> <dir2>       Compute the overlap of two profiles\n");
 486   fnotice (file, "    -f, --function                      Print function level info\n");
 487   fnotice (file, "    -F, --fullname                      Print full filename\n");
 488   fnotice (file, "    -h, --hotonly                       Only print info for hot objects/functions\n");
 489   fnotice (file, "    -o, --object                        Print object level info\n");
 490   fnotice (file, "    -t <float>, --hot_threshold <float> Set the threshold for hotness\n");
 491   fnotice (file, "    -v, --verbose                       Verbose mode\n");
 492 }
 493
 494 static const struct option overlap_options[] =
 495 {
 496   { "verbose",                no_argument,       NULL, 'v' },
 497   { "function",               no_argument,       NULL, 'f' },
 498   { "fullname",               no_argument,       NULL, 'F' },
 499   { "object",                 no_argument,       NULL, 'o' },
 500   { "hotonly",                no_argument,       NULL, 'h' },
 501   { "hot_threshold",          required_argument, NULL, 't' },
 502   { 0, 0, 0, 0 }
 503 };
 504
 505 /* Print overlap usage and exit.  */
 506
 507 static void ATTRIBUTE_NORETURN
 508 overlap_usage (void)
 509 {
 510   fnotice (stderr, "Overlap subcomand usage:");
 511   print_overlap_usage_message (true);
 512   exit (FATAL_EXIT_CODE);
 513 }
 514
 515 int overlap_func_level;
 516 int overlap_obj_level;
 517 int overlap_hot_only;
 518 int overlap_use_fullname;
 519 double overlap_hot_threshold = 0.005;
 520
 521 /* Driver for profile overlap sub-command.  */
 522
 523 static int
 524 do_overlap (int argc, char **argv)
 525 {
 526   int opt;
 527   int ret;
 528
 529   optind = 0;
 530   while ((opt = getopt_long (argc, argv, "vfFoht:", overlap_options, NULL)) != -1)
 531     {
 532       switch (opt)
 533         {
 534         case 'v':
 535           verbose = true;
 536           gcov_set_verbose ();
 537           break;
 538         case 'f':
 539           overlap_func_level = 1;
 540           break;
 541         case 'F':
 542           overlap_use_fullname = 1;
 543           break;
 544         case 'o':
 545           overlap_obj_level = 1;
 546           break;
 547         case 'h':
 548           overlap_hot_only = 1;
 549           break;
 550         case 't':
 551           overlap_hot_threshold = atof (optarg);
 552           break;
 553         default:
 554           overlap_usage ();
 555         }
 556     }
 557
 558   if (argc - optind == 2)
 559     ret = profile_overlap (argv[optind], argv[optind+1]);
 560   else
 561     overlap_usage ();
 562
 563   return ret;
 564 }
 565
 566
 567 /* Print a usage message and exit.  If ERROR_P is nonzero, this is an error,
 568    otherwise the output of --help.  */
 569
 570 static void
 571 print_usage (int error_p)
 572 {
 573   FILE *file = error_p ? stderr : stdout;
 574   int status = error_p ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE;
 575
 576   fnotice (file, "Usage: %s [OPTION]... SUB_COMMAND [OPTION]...\n\n", progname);
 577   fnotice (file, "Offline tool to handle gcda counts\n\n");
 578   fnotice (file, "  -h, --help                            Print this help, then exit\n");
 579   fnotice (file, "  -v, --version                         Print version number, then exit\n");
 580   print_merge_usage_message (error_p);
 581   print_merge_stream_usage_message (error_p);
 582   print_rewrite_usage_message (error_p);
 583   print_overlap_usage_message (error_p);
 584   fnotice (file, "\nFor bug reporting instructions, please see:\n%s.\n",
 585            bug_report_url);
 586   exit (status);
 587 }
 588
 589 /* Print version information and exit.  */
 590
 591 static void
 592 print_version (void)
 593 {
 594   fnotice (stdout, "%s %s%s\n", progname, pkgversion_string, version_string);
 595   fnotice (stdout, "Copyright %s 2022 Free Software Foundation, Inc.\n",
 596            _("(C)"));
 597   fnotice (stdout,
 598            _("This is free software; see the source for copying conditions.  There is NO\n\
 599 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\n"));
 600   exit (SUCCESS_EXIT_CODE);
 601 }
 602
 603 static const struct option options[] =
 604 {
 605   { "help",                 no_argument,       NULL, 'h' },
 606   { "version",              no_argument,       NULL, 'v' },
 607   { 0, 0, 0, 0 }
 608 };
 609
 610 /* Process args, return index to first non-arg.  */
 611
 612 static int
 613 process_args (int argc, char **argv)
 614 {
 615   int opt;
 616
 617   while ((opt = getopt_long (argc, argv, "+hv", options, NULL)) != -1)
 618     {
 619       switch (opt)
 620         {
 621         case 'h':
 622           print_usage (false);
 623           /* Print_usage will exit.  */
 624           /* FALLTHRU */
 625         case 'v':
 626           print_version ();
 627           /* Print_version will exit.  */
 628           /* FALLTHRU */
 629         default:
 630           print_usage (true);
 631           /* Print_usage will exit.  */
 632         }
 633     }
 634
 635   return optind;
 636 }
 637
 638 /* Main function for gcov-tool.  */
 639
 640 int
 641 main (int argc, char **argv)
 642 {
 643   const char *p;
 644   const char *sub_command;
 645
 646   p = argv[0] + strlen (argv[0]);
 647   while (p != argv[0] && !IS_DIR_SEPARATOR (p[-1]))
 648     --p;
 649   progname = p;
 650
 651   xmalloc_set_program_name (progname);
 652
 653   /* Unlock the stdio streams.  */
 654   unlock_std_streams ();
 655
 656   gcc_init_libintl ();
 657
 658   diagnostic_initialize (global_dc, 0);
 659
 660   /* Handle response files.  */
 661   expandargv (&argc, &argv);
 662
 663   process_args (argc, argv);
 664   if (optind >= argc)
 665     print_usage (true);
 666
 667   sub_command = argv[optind];
 668
 669   if (!strcmp (sub_command, "merge"))
 670     return do_merge (argc - optind, argv + optind);
 671   else if (!strcmp (sub_command, "merge-stream"))
 672     return do_merge_stream (argc - optind, argv + optind);
 673   else if (!strcmp (sub_command, "rewrite"))
 674     return do_rewrite (argc - optind, argv + optind);
 675   else if (!strcmp (sub_command, "overlap"))
 676     return do_overlap (argc - optind, argv + optind);
 677
 678   print_usage (true);
 679 }