gcc/gcov-dump.c

   1 /* Dump a gcov file, for debugging use.
   2    Copyright (C) 2002-2016 Free Software Foundation, Inc.
   3    Contributed by Nathan Sidwell <nathan@codesourcery.com>
   4
   5 Gcov is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU General Public License as published by
   7 the Free Software Foundation; either version 3, or (at your option)
   8 any later version.
   9
  10 Gcov is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with Gcov; see the file COPYING3.  If not see
  17 <http://www.gnu.org/licenses/>.  */
  18
  19 #include "config.h"
  20 #include "system.h"
  21 #include "coretypes.h"
  22 #include "tm.h"
  23 #include "version.h"
  24 #include "intl.h"
  25 #include "diagnostic.h"
  26 #include <getopt.h>
  27 #define IN_GCOV (-1)
  28 #include "gcov-io.h"
  29 #include "gcov-io.c"
  30
  31 static void dump_gcov_file (const char *);
  32 static void print_prefix (const char *, unsigned, gcov_position_t);
  33 static void print_usage (void);
  34 static void print_version (void);
  35 static void tag_function (const char *, unsigned, unsigned);
  36 static void tag_blocks (const char *, unsigned, unsigned);
  37 static void tag_arcs (const char *, unsigned, unsigned);
  38 static void tag_lines (const char *, unsigned, unsigned);
  39 static void tag_counters (const char *, unsigned, unsigned);
  40 static void tag_summary (const char *, unsigned, unsigned);
  41 static void dump_working_sets (const char *filename ATTRIBUTE_UNUSED,
  42                                const struct gcov_ctr_summary *summary);
  43 extern int main (int, char **);
  44
  45 typedef struct tag_format
  46 {
  47   unsigned tag;
  48   char const *name;
  49   void (*proc) (const char *, unsigned, unsigned);
  50 } tag_format_t;
  51
  52 static int flag_dump_contents = 0;
  53 static int flag_dump_positions = 0;
  54 static int flag_dump_working_sets = 0;
  55
  56 static const struct option options[] =
  57 {
  58   { "help",                 no_argument,       NULL, 'h' },
  59   { "version",              no_argument,       NULL, 'v' },
  60   { "long",                 no_argument,       NULL, 'l' },
  61   { "positions",            no_argument,       NULL, 'o' },
  62   { "working-sets",         no_argument,       NULL, 'w' },
  63   { 0, 0, 0, 0 }
  64 };
  65
  66 static const tag_format_t tag_table[] =
  67 {
  68   {0, "NOP", NULL},
  69   {0, "UNKNOWN", NULL},
  70   {0, "COUNTERS", tag_counters},
  71   {GCOV_TAG_FUNCTION, "FUNCTION", tag_function},
  72   {GCOV_TAG_BLOCKS, "BLOCKS", tag_blocks},
  73   {GCOV_TAG_ARCS, "ARCS", tag_arcs},
  74   {GCOV_TAG_LINES, "LINES", tag_lines},
  75   {GCOV_TAG_OBJECT_SUMMARY, "OBJECT_SUMMARY", tag_summary},
  76   {GCOV_TAG_PROGRAM_SUMMARY, "PROGRAM_SUMMARY", tag_summary},
  77   {0, NULL, NULL}
  78 };
  79
  80 int
  81 main (int argc ATTRIBUTE_UNUSED, char **argv)
  82 {
  83   int opt;
  84   const char *p;
  85
  86   p = argv[0] + strlen (argv[0]);
  87   while (p != argv[0] && !IS_DIR_SEPARATOR (p[-1]))
  88     --p;
  89   progname = p;
  90
  91   xmalloc_set_program_name (progname);
  92
  93   /* Unlock the stdio streams.  */
  94   unlock_std_streams ();
  95
  96   gcc_init_libintl ();
  97
  98   diagnostic_initialize (global_dc, 0);
  99
 100   while ((opt = getopt_long (argc, argv, "hlpvw", options, NULL)) != -1)
 101     {
 102       switch (opt)
 103         {
 104         case 'h':
 105           print_usage ();
 106           break;
 107         case 'v':
 108           print_version ();
 109           break;
 110         case 'l':
 111           flag_dump_contents = 1;
 112           break;
 113         case 'p':
 114           flag_dump_positions = 1;
 115           break;
 116         case 'w':
 117           flag_dump_working_sets = 1;
 118           break;
 119         default:
 120           fprintf (stderr, "unknown flag `%c'\n", opt);
 121         }
 122     }
 123
 124   while (argv[optind])
 125     dump_gcov_file (argv[optind++]);
 126   return 0;
 127 }
 128
 129 static void
 130 print_usage (void)
 131 {
 132   printf ("Usage: gcov-dump [OPTION] ... gcovfiles\n");
 133   printf ("Print coverage file contents\n");
 134   printf ("  -h, --help           Print this help\n");
 135   printf ("  -v, --version        Print version number\n");
 136   printf ("  -l, --long           Dump record contents too\n");
 137   printf ("  -p, --positions      Dump record positions\n");
 138   printf ("  -w, --working-sets   Dump working set computed from summary\n");
 139 }
 140
 141 static void
 142 print_version (void)
 143 {
 144   printf ("gcov-dump %s%s\n", pkgversion_string, version_string);
 145   printf ("Copyright (C) 2016 Free Software Foundation, Inc.\n");
 146   printf ("This is free software; see the source for copying conditions.\n"
 147           "There is NO warranty; not even for MERCHANTABILITY or \n"
 148           "FITNESS FOR A PARTICULAR PURPOSE.\n\n");
 149 }
 150
 151 static void
 152 print_prefix (const char *filename, unsigned depth, gcov_position_t position)
 153 {
 154   static const char prefix[] = "    ";
 155
 156   printf ("%s:", filename);
 157   if (flag_dump_positions)
 158     printf ("%lu:", (unsigned long) position);
 159   printf ("%.*s", (int) depth, prefix);
 160 }
 161
 162 static void
 163 dump_gcov_file (const char *filename)
 164 {
 165   unsigned tags[4];
 166   unsigned depth = 0;
 167
 168   if (!gcov_open (filename, 1))
 169     {
 170       fprintf (stderr, "%s:cannot open\n", filename);
 171       return;
 172     }
 173
 174   /* magic */
 175   {
 176     unsigned magic = gcov_read_unsigned ();
 177     unsigned version;
 178     const char *type = NULL;
 179     int endianness = 0;
 180     char m[4], v[4];
 181
 182     if ((endianness = gcov_magic (magic, GCOV_DATA_MAGIC)))
 183       type = "data";
 184     else if ((endianness = gcov_magic (magic, GCOV_NOTE_MAGIC)))
 185       type = "note";
 186     else
 187       {
 188         printf ("%s:not a gcov file\n", filename);
 189         gcov_close ();
 190         return;
 191       }
 192     version = gcov_read_unsigned ();
 193     GCOV_UNSIGNED2STRING (v, version);
 194     GCOV_UNSIGNED2STRING (m, magic);
 195
 196     printf ("%s:%s:magic `%.4s':version `%.4s'%s\n", filename, type,
 197             m, v, endianness < 0 ? " (swapped endianness)" : "");
 198     if (version != GCOV_VERSION)
 199       {
 200         char e[4];
 201
 202         GCOV_UNSIGNED2STRING (e, GCOV_VERSION);
 203         printf ("%s:warning:current version is `%.4s'\n", filename, e);
 204       }
 205   }
 206
 207   /* stamp */
 208   {
 209     unsigned stamp = gcov_read_unsigned ();
 210
 211     printf ("%s:stamp %lu\n", filename, (unsigned long)stamp);
 212   }
 213
 214   while (1)
 215     {
 216       gcov_position_t base, position = gcov_position ();
 217       unsigned tag, length;
 218       tag_format_t const *format;
 219       unsigned tag_depth;
 220       int error;
 221       unsigned mask;
 222
 223       tag = gcov_read_unsigned ();
 224       if (!tag)
 225         break;
 226       length = gcov_read_unsigned ();
 227       base = gcov_position ();
 228       mask = GCOV_TAG_MASK (tag) >> 1;
 229       for (tag_depth = 4; mask; mask >>= 8)
 230         {
 231           if ((mask & 0xff) != 0xff)
 232             {
 233               printf ("%s:tag `%08x' is invalid\n", filename, tag);
 234               break;
 235             }
 236           tag_depth--;
 237         }
 238       for (format = tag_table; format->name; format++)
 239         if (format->tag == tag)
 240           goto found;
 241       format = &tag_table[GCOV_TAG_IS_COUNTER (tag) ? 2 : 1];
 242     found:;
 243       if (tag)
 244         {
 245           if (depth && depth < tag_depth)
 246             {
 247               if (!GCOV_TAG_IS_SUBTAG (tags[depth - 1], tag))
 248                 printf ("%s:tag `%08x' is incorrectly nested\n",
 249                         filename, tag);
 250             }
 251           depth = tag_depth;
 252           tags[depth - 1] = tag;
 253         }
 254
 255       print_prefix (filename, tag_depth, position);
 256       printf ("%08x:%4u:%s", tag, length, format->name);
 257       if (format->proc)
 258         (*format->proc) (filename, tag, length);
 259
 260       printf ("\n");
 261       if (flag_dump_contents && format->proc)
 262         {
 263           unsigned long actual_length = gcov_position () - base;
 264
 265           if (actual_length > length)
 266             printf ("%s:record size mismatch %lu bytes overread\n",
 267                     filename, actual_length - length);
 268           else if (length > actual_length)
 269             printf ("%s:record size mismatch %lu bytes unread\n",
 270                     filename, length - actual_length);
 271         }
 272       gcov_sync (base, length);
 273       if ((error = gcov_is_error ()))
 274         {
 275           printf (error < 0 ? "%s:counter overflow at %lu\n" :
 276                   "%s:read error at %lu\n", filename,
 277                   (long unsigned) gcov_position ());
 278           break;
 279         }
 280     }
 281   gcov_close ();
 282 }
 283
 284 static void
 285 tag_function (const char *filename ATTRIBUTE_UNUSED,
 286               unsigned tag ATTRIBUTE_UNUSED, unsigned length)
 287 {
 288   unsigned long pos = gcov_position ();
 289
 290   if (!length)
 291     printf (" placeholder");
 292   else
 293     {
 294       printf (" ident=%u", gcov_read_unsigned ());
 295       printf (", lineno_checksum=0x%08x", gcov_read_unsigned ());
 296       printf (", cfg_checksum=0x%08x", gcov_read_unsigned ());
 297
 298       if (gcov_position () - pos < length)
 299         {
 300           const char *name;
 301
 302           name = gcov_read_string ();
 303           printf (", `%s'", name ? name : "NULL");
 304           name = gcov_read_string ();
 305           printf (" %s", name ? name : "NULL");
 306           printf (":%u", gcov_read_unsigned ());
 307         }
 308     }
 309 }
 310
 311 static void
 312 tag_blocks (const char *filename ATTRIBUTE_UNUSED,
 313             unsigned tag ATTRIBUTE_UNUSED, unsigned length ATTRIBUTE_UNUSED)
 314 {
 315   unsigned n_blocks = GCOV_TAG_BLOCKS_NUM (length);
 316
 317   printf (" %u blocks", n_blocks);
 318
 319   if (flag_dump_contents)
 320     {
 321       unsigned ix;
 322
 323       for (ix = 0; ix != n_blocks; ix++)
 324         {
 325           if (!(ix & 7))
 326             {
 327               printf ("\n");
 328               print_prefix (filename, 0, gcov_position ());
 329               printf ("\t\t%u", ix);
 330             }
 331           printf (" %04x", gcov_read_unsigned ());
 332         }
 333     }
 334 }
 335
 336 static void
 337 tag_arcs (const char *filename ATTRIBUTE_UNUSED,
 338           unsigned tag ATTRIBUTE_UNUSED, unsigned length ATTRIBUTE_UNUSED)
 339 {
 340   unsigned n_arcs = GCOV_TAG_ARCS_NUM (length);
 341
 342   printf (" %u arcs", n_arcs);
 343   if (flag_dump_contents)
 344     {
 345       unsigned ix;
 346       unsigned blockno = gcov_read_unsigned ();
 347
 348       for (ix = 0; ix != n_arcs; ix++)
 349         {
 350           unsigned dst, flags;
 351
 352           if (!(ix & 3))
 353             {
 354               printf ("\n");
 355               print_prefix (filename, 0, gcov_position ());
 356               printf ("\tblock %u:", blockno);
 357             }
 358           dst = gcov_read_unsigned ();
 359           flags = gcov_read_unsigned ();
 360           printf (" %u:%04x", dst, flags);
 361           if (flags)
 362             {
 363               char c = '(';
 364
 365               if (flags & GCOV_ARC_ON_TREE)
 366                 printf ("%ctree", c), c = ',';
 367               if (flags & GCOV_ARC_FAKE)
 368                 printf ("%cfake", c), c = ',';
 369               if (flags & GCOV_ARC_FALLTHROUGH)
 370                 printf ("%cfall", c), c = ',';
 371               printf (")");
 372             }
 373         }
 374     }
 375 }
 376
 377 static void
 378 tag_lines (const char *filename ATTRIBUTE_UNUSED,
 379            unsigned tag ATTRIBUTE_UNUSED, unsigned length ATTRIBUTE_UNUSED)
 380 {
 381   if (flag_dump_contents)
 382     {
 383       unsigned blockno = gcov_read_unsigned ();
 384       char const *sep = NULL;
 385
 386       while (1)
 387         {
 388           gcov_position_t position = gcov_position ();
 389           const char *source = NULL;
 390           unsigned lineno = gcov_read_unsigned ();
 391
 392           if (!lineno)
 393             {
 394               source = gcov_read_string ();
 395               if (!source)
 396                 break;
 397               sep = NULL;
 398             }
 399
 400           if (!sep)
 401             {
 402               printf ("\n");
 403               print_prefix (filename, 0, position);
 404               printf ("\tblock %u:", blockno);
 405               sep = "";
 406             }
 407           if (lineno)
 408             {
 409               printf ("%s%u", sep, lineno);
 410               sep = ", ";
 411             }
 412           else
 413             {
 414               printf ("%s`%s'", sep, source);
 415               sep = ":";
 416             }
 417         }
 418     }
 419 }
 420
 421 static void
 422 tag_counters (const char *filename ATTRIBUTE_UNUSED,
 423               unsigned tag ATTRIBUTE_UNUSED, unsigned length ATTRIBUTE_UNUSED)
 424 {
 425 #define DEF_GCOV_COUNTER(COUNTER, NAME, MERGE_FN) NAME,
 426   static const char *const counter_names[] = {
 427 #include "gcov-counter.def"
 428 };
 429 #undef DEF_GCOV_COUNTER
 430   unsigned n_counts = GCOV_TAG_COUNTER_NUM (length);
 431
 432   printf (" %s %u counts",
 433           counter_names[GCOV_COUNTER_FOR_TAG (tag)], n_counts);
 434   if (flag_dump_contents)
 435     {
 436       unsigned ix;
 437
 438       for (ix = 0; ix != n_counts; ix++)
 439         {
 440           gcov_type count;
 441
 442           if (!(ix & 7))
 443             {
 444               printf ("\n");
 445               print_prefix (filename, 0, gcov_position ());
 446               printf ("\t\t%u", ix);
 447             }
 448
 449           count = gcov_read_counter ();
 450           printf (" ");
 451           printf ("%" PRId64, count);
 452         }
 453     }
 454 }
 455
 456 static void
 457 tag_summary (const char *filename ATTRIBUTE_UNUSED,
 458              unsigned tag ATTRIBUTE_UNUSED, unsigned length ATTRIBUTE_UNUSED)
 459 {
 460   struct gcov_summary summary;
 461   unsigned ix, h_ix;
 462   gcov_bucket_type *histo_bucket;
 463
 464   gcov_read_summary (&summary);
 465   printf (" checksum=0x%08x", summary.checksum);
 466
 467   for (ix = 0; ix != GCOV_COUNTERS_SUMMABLE; ix++)
 468     {
 469       printf ("\n");
 470       print_prefix (filename, 0, 0);
 471       printf ("\t\tcounts=%u, runs=%u",
 472               summary.ctrs[ix].num, summary.ctrs[ix].runs);
 473
 474       printf (", sum_all=%" PRId64,
 475               (int64_t)summary.ctrs[ix].sum_all);
 476       printf (", run_max=%" PRId64,
 477               (int64_t)summary.ctrs[ix].run_max);
 478       printf (", sum_max=%" PRId64,
 479               (int64_t)summary.ctrs[ix].sum_max);
 480       if (ix != GCOV_COUNTER_ARCS)
 481         continue;
 482       printf ("\n");
 483       print_prefix (filename, 0, 0);
 484       printf ("\t\tcounter histogram:");
 485       for (h_ix = 0; h_ix < GCOV_HISTOGRAM_SIZE; h_ix++)
 486         {
 487           histo_bucket = &summary.ctrs[ix].histogram[h_ix];
 488           if (!histo_bucket->num_counters)
 489             continue;
 490           printf ("\n");
 491           print_prefix (filename, 0, 0);
 492           printf ("\t\t%d: num counts=%u, min counter="
 493               "%" PRId64 ", cum_counter="
 494               "%" PRId64,
 495               h_ix, histo_bucket->num_counters,
 496               (int64_t)histo_bucket->min_value,
 497               (int64_t)histo_bucket->cum_value);
 498         }
 499       if (flag_dump_working_sets)
 500         dump_working_sets (filename, &summary.ctrs[ix]);
 501     }
 502 }
 503
 504 static void
 505 dump_working_sets (const char *filename ATTRIBUTE_UNUSED,
 506                    const struct gcov_ctr_summary *summary)
 507 {
 508   gcov_working_set_t gcov_working_sets[NUM_GCOV_WORKING_SETS];
 509   unsigned ws_ix, pctinc, pct;
 510   gcov_working_set_t *ws_info;
 511
 512   compute_working_sets (summary, gcov_working_sets);
 513
 514   printf ("\n");
 515   print_prefix (filename, 0, 0);
 516   printf ("\t\tcounter working sets:");
 517   /* Multiply the percentage by 100 to avoid float.  */
 518   pctinc = 100 * 100 / NUM_GCOV_WORKING_SETS;
 519   for (ws_ix = 0, pct = pctinc; ws_ix < NUM_GCOV_WORKING_SETS;
 520        ws_ix++, pct += pctinc)
 521     {
 522       if (ws_ix == NUM_GCOV_WORKING_SETS - 1)
 523         pct = 9990;
 524       ws_info = &gcov_working_sets[ws_ix];
 525       /* Print out the percentage using int arithmatic to avoid float.  */
 526       printf ("\n");
 527       print_prefix (filename, 0, 0);
 528       printf ("\t\t%u.%02u%%: num counts=%u, min counter="
 529                "%" PRId64,
 530                pct / 100, pct - (pct / 100 * 100),
 531                ws_info->num_counters,
 532                (int64_t)ws_info->min_counter);
 533     }
 534 }