gcc/gcov-dump.c

   1 /* Dump a gcov file, for debugging use.
   2    Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
   3    Free Software Foundation, Inc.
   4    Contributed by Nathan Sidwell <nathan@codesourcery.com>
   5
   6 Gcov is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 3, or (at your option)
   9 any later version.
  10
  11 Gcov is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with Gcov; see the file COPYING3.  If not see
  18 <http://www.gnu.org/licenses/>.  */
  19
  20 #include "config.h"
  21 #include "system.h"
  22 #include "coretypes.h"
  23 #include "tm.h"
  24 #include "version.h"
  25 #include "intl.h"
  26 #include "diagnostic.h"
  27 #include <getopt.h>
  28 #define IN_GCOV (-1)
  29 #include "gcov-io.h"
  30 #include "gcov-io.c"
  31
  32 static void dump_file (const char *);
  33 static void print_prefix (const char *, unsigned, gcov_position_t);
  34 static void print_usage (void);
  35 static void print_version (void);
  36 static void tag_function (const char *, unsigned, unsigned);
  37 static void tag_blocks (const char *, unsigned, unsigned);
  38 static void tag_arcs (const char *, unsigned, unsigned);
  39 static void tag_lines (const char *, unsigned, unsigned);
  40 static void tag_counters (const char *, unsigned, unsigned);
  41 static void tag_summary (const char *, unsigned, unsigned);
  42 extern int main (int, char **);
  43
  44 typedef struct tag_format
  45 {
  46   unsigned tag;
  47   char const *name;
  48   void (*proc) (const char *, unsigned, unsigned);
  49 } tag_format_t;
  50
  51 static int flag_dump_contents = 0;
  52 static int flag_dump_positions = 0;
  53
  54 static const struct option options[] =
  55 {
  56   { "help",                 no_argument,       NULL, 'h' },
  57   { "version",              no_argument,       NULL, 'v' },
  58   { "long",                 no_argument,       NULL, 'l' },
  59   { "positions",            no_argument,       NULL, 'o' },
  60   { 0, 0, 0, 0 }
  61 };
  62
  63 static const tag_format_t tag_table[] =
  64 {
  65   {0, "NOP", NULL},
  66   {0, "UNKNOWN", NULL},
  67   {0, "COUNTERS", tag_counters},
  68   {GCOV_TAG_FUNCTION, "FUNCTION", tag_function},
  69   {GCOV_TAG_BLOCKS, "BLOCKS", tag_blocks},
  70   {GCOV_TAG_ARCS, "ARCS", tag_arcs},
  71   {GCOV_TAG_LINES, "LINES", tag_lines},
  72   {GCOV_TAG_OBJECT_SUMMARY, "OBJECT_SUMMARY", tag_summary},
  73   {GCOV_TAG_PROGRAM_SUMMARY, "PROGRAM_SUMMARY", tag_summary},
  74   {0, NULL, NULL}
  75 };
  76
  77 int
  78 main (int argc ATTRIBUTE_UNUSED, char **argv)
  79 {
  80   int opt;
  81   const char *p;
  82
  83   p = argv[0] + strlen (argv[0]);
  84   while (p != argv[0] && !IS_DIR_SEPARATOR (p[-1]))
  85     --p;
  86   progname = p;
  87
  88   xmalloc_set_program_name (progname);
  89
  90   /* Unlock the stdio streams.  */
  91   unlock_std_streams ();
  92
  93   gcc_init_libintl ();
  94
  95   diagnostic_initialize (global_dc, 0);
  96
  97   while ((opt = getopt_long (argc, argv, "hlpv", options, NULL)) != -1)
  98     {
  99       switch (opt)
 100         {
 101         case 'h':
 102           print_usage ();
 103           break;
 104         case 'v':
 105           print_version ();
 106           break;
 107         case 'l':
 108           flag_dump_contents = 1;
 109           break;
 110         case 'p':
 111           flag_dump_positions = 1;
 112           break;
 113         default:
 114           fprintf (stderr, "unknown flag `%c'\n", opt);
 115         }
 116     }
 117
 118   while (argv[optind])
 119     dump_file (argv[optind++]);
 120   return 0;
 121 }
 122
 123 static void
 124 print_usage (void)
 125 {
 126   printf ("Usage: gcov-dump [OPTION] ... gcovfiles\n");
 127   printf ("Print coverage file contents\n");
 128   printf ("  -h, --help           Print this help\n");
 129   printf ("  -v, --version        Print version number\n");
 130   printf ("  -l, --long           Dump record contents too\n");
 131   printf ("  -p, --positions      Dump record positions\n");
 132 }
 133
 134 static void
 135 print_version (void)
 136 {
 137   printf ("gcov-dump %s%s\n", pkgversion_string, version_string);
 138   printf ("Copyright (C) 2011 Free Software Foundation, Inc.\n");
 139   printf ("This is free software; see the source for copying conditions.\n"
 140           "There is NO warranty; not even for MERCHANTABILITY or \n"
 141           "FITNESS FOR A PARTICULAR PURPOSE.\n\n");
 142 }
 143
 144 static void
 145 print_prefix (const char *filename, unsigned depth, gcov_position_t position)
 146 {
 147   static const char prefix[] = "    ";
 148
 149   printf ("%s:", filename);
 150   if (flag_dump_positions)
 151     printf ("%lu:", (unsigned long) position);
 152   printf ("%.*s", (int) depth, prefix);
 153 }
 154
 155 static void
 156 dump_file (const char *filename)
 157 {
 158   unsigned tags[4];
 159   unsigned depth = 0;
 160
 161   if (!gcov_open (filename, 1))
 162     {
 163       fprintf (stderr, "%s:cannot open\n", filename);
 164       return;
 165     }
 166
 167   /* magic */
 168   {
 169     unsigned magic = gcov_read_unsigned ();
 170     unsigned version;
 171     const char *type = NULL;
 172     int endianness = 0;
 173     char m[4], v[4];
 174
 175     if ((endianness = gcov_magic (magic, GCOV_DATA_MAGIC)))
 176       type = "data";
 177     else if ((endianness = gcov_magic (magic, GCOV_NOTE_MAGIC)))
 178       type = "note";
 179     else
 180       {
 181         printf ("%s:not a gcov file\n", filename);
 182         gcov_close ();
 183         return;
 184       }
 185     version = gcov_read_unsigned ();
 186     GCOV_UNSIGNED2STRING (v, version);
 187     GCOV_UNSIGNED2STRING (m, magic);
 188
 189     printf ("%s:%s:magic `%.4s':version `%.4s'%s\n", filename, type,
 190             m, v, endianness < 0 ? " (swapped endianness)" : "");
 191     if (version != GCOV_VERSION)
 192       {
 193         char e[4];
 194
 195         GCOV_UNSIGNED2STRING (e, GCOV_VERSION);
 196         printf ("%s:warning:current version is `%.4s'\n", filename, e);
 197       }
 198   }
 199
 200   /* stamp */
 201   {
 202     unsigned stamp = gcov_read_unsigned ();
 203
 204     printf ("%s:stamp %lu\n", filename, (unsigned long)stamp);
 205   }
 206
 207   while (1)
 208     {
 209       gcov_position_t base, position = gcov_position ();
 210       unsigned tag, length;
 211       tag_format_t const *format;
 212       unsigned tag_depth;
 213       int error;
 214       unsigned mask;
 215
 216       tag = gcov_read_unsigned ();
 217       if (!tag)
 218         break;
 219       length = gcov_read_unsigned ();
 220       base = gcov_position ();
 221       mask = GCOV_TAG_MASK (tag) >> 1;
 222       for (tag_depth = 4; mask; mask >>= 8)
 223         {
 224           if ((mask & 0xff) != 0xff)
 225             {
 226               printf ("%s:tag `%08x' is invalid\n", filename, tag);
 227               break;
 228             }
 229           tag_depth--;
 230         }
 231       for (format = tag_table; format->name; format++)
 232         if (format->tag == tag)
 233           goto found;
 234       format = &tag_table[GCOV_TAG_IS_COUNTER (tag) ? 2 : 1];
 235     found:;
 236       if (tag)
 237         {
 238           if (depth && depth < tag_depth)
 239             {
 240               if (!GCOV_TAG_IS_SUBTAG (tags[depth - 1], tag))
 241                 printf ("%s:tag `%08x' is incorrectly nested\n",
 242                         filename, tag);
 243             }
 244           depth = tag_depth;
 245           tags[depth - 1] = tag;
 246         }
 247
 248       print_prefix (filename, tag_depth, position);
 249       printf ("%08x:%4u:%s", tag, length, format->name);
 250       if (format->proc)
 251         (*format->proc) (filename, tag, length);
 252
 253       printf ("\n");
 254       if (flag_dump_contents && format->proc)
 255         {
 256           unsigned long actual_length = gcov_position () - base;
 257
 258           if (actual_length > length)
 259             printf ("%s:record size mismatch %lu bytes overread\n",
 260                     filename, actual_length - length);
 261           else if (length > actual_length)
 262             printf ("%s:record size mismatch %lu bytes unread\n",
 263                     filename, length - actual_length);
 264         }
 265       gcov_sync (base, length);
 266       if ((error = gcov_is_error ()))
 267         {
 268           printf (error < 0 ? "%s:counter overflow at %lu\n" :
 269                   "%s:read error at %lu\n", filename,
 270                   (long unsigned) gcov_position ());
 271           break;
 272         }
 273     }
 274   gcov_close ();
 275 }
 276
 277 static void
 278 tag_function (const char *filename ATTRIBUTE_UNUSED,
 279               unsigned tag ATTRIBUTE_UNUSED, unsigned length ATTRIBUTE_UNUSED)
 280 {
 281   unsigned long pos = gcov_position ();
 282
 283   printf (" ident=%u", gcov_read_unsigned ());
 284   printf (", lineno_checksum=0x%08x", gcov_read_unsigned ());
 285   printf (", cfg_checksum_checksum=0x%08x", gcov_read_unsigned ());
 286
 287   if (gcov_position () - pos < length)
 288     {
 289       const char *name;
 290
 291       name = gcov_read_string ();
 292       printf (", `%s'", name ? name : "NULL");
 293       name = gcov_read_string ();
 294       printf (" %s", name ? name : "NULL");
 295       printf (":%u", gcov_read_unsigned ());
 296     }
 297 }
 298
 299 static void
 300 tag_blocks (const char *filename ATTRIBUTE_UNUSED,
 301             unsigned tag ATTRIBUTE_UNUSED, unsigned length ATTRIBUTE_UNUSED)
 302 {
 303   unsigned n_blocks = GCOV_TAG_BLOCKS_NUM (length);
 304
 305   printf (" %u blocks", n_blocks);
 306
 307   if (flag_dump_contents)
 308     {
 309       unsigned ix;
 310
 311       for (ix = 0; ix != n_blocks; ix++)
 312         {
 313           if (!(ix & 7))
 314             {
 315               printf ("\n");
 316               print_prefix (filename, 0, gcov_position ());
 317               printf ("\t\t%u", ix);
 318             }
 319           printf (" %04x", gcov_read_unsigned ());
 320         }
 321     }
 322 }
 323
 324 static void
 325 tag_arcs (const char *filename ATTRIBUTE_UNUSED,
 326           unsigned tag ATTRIBUTE_UNUSED, unsigned length ATTRIBUTE_UNUSED)
 327 {
 328   unsigned n_arcs = GCOV_TAG_ARCS_NUM (length);
 329
 330   printf (" %u arcs", n_arcs);
 331   if (flag_dump_contents)
 332     {
 333       unsigned ix;
 334       unsigned blockno = gcov_read_unsigned ();
 335
 336       for (ix = 0; ix != n_arcs; ix++)
 337         {
 338           unsigned dst, flags;
 339
 340           if (!(ix & 3))
 341             {
 342               printf ("\n");
 343               print_prefix (filename, 0, gcov_position ());
 344               printf ("\tblock %u:", blockno);
 345             }
 346           dst = gcov_read_unsigned ();
 347           flags = gcov_read_unsigned ();
 348           printf (" %u:%04x", dst, flags);
 349         }
 350     }
 351 }
 352
 353 static void
 354 tag_lines (const char *filename ATTRIBUTE_UNUSED,
 355            unsigned tag ATTRIBUTE_UNUSED, unsigned length ATTRIBUTE_UNUSED)
 356 {
 357   if (flag_dump_contents)
 358     {
 359       unsigned blockno = gcov_read_unsigned ();
 360       char const *sep = NULL;
 361
 362       while (1)
 363         {
 364           gcov_position_t position = gcov_position ();
 365           const char *source = NULL;
 366           unsigned lineno = gcov_read_unsigned ();
 367
 368           if (!lineno)
 369             {
 370               source = gcov_read_string ();
 371               if (!source)
 372                 break;
 373               sep = NULL;
 374             }
 375
 376           if (!sep)
 377             {
 378               printf ("\n");
 379               print_prefix (filename, 0, position);
 380               printf ("\tblock %u:", blockno);
 381               sep = "";
 382             }
 383           if (lineno)
 384             {
 385               printf ("%s%u", sep, lineno);
 386               sep = ", ";
 387             }
 388           else
 389             {
 390               printf ("%s`%s'", sep, source);
 391               sep = ":";
 392             }
 393         }
 394     }
 395 }
 396
 397 static void
 398 tag_counters (const char *filename ATTRIBUTE_UNUSED,
 399               unsigned tag ATTRIBUTE_UNUSED, unsigned length ATTRIBUTE_UNUSED)
 400 {
 401   static const char *const counter_names[] = GCOV_COUNTER_NAMES;
 402   unsigned n_counts = GCOV_TAG_COUNTER_NUM (length);
 403
 404   printf (" %s %u counts",
 405           counter_names[GCOV_COUNTER_FOR_TAG (tag)], n_counts);
 406   if (flag_dump_contents)
 407     {
 408       unsigned ix;
 409
 410       for (ix = 0; ix != n_counts; ix++)
 411         {
 412           gcov_type count;
 413
 414           if (!(ix & 7))
 415             {
 416               printf ("\n");
 417               print_prefix (filename, 0, gcov_position ());
 418               printf ("\t\t%u", ix);
 419             }
 420
 421           count = gcov_read_counter ();
 422           printf (" ");
 423           printf (HOST_WIDEST_INT_PRINT_DEC, count);
 424         }
 425     }
 426 }
 427
 428 static void
 429 tag_summary (const char *filename ATTRIBUTE_UNUSED,
 430              unsigned tag ATTRIBUTE_UNUSED, unsigned length ATTRIBUTE_UNUSED)
 431 {
 432   struct gcov_summary summary;
 433   unsigned ix;
 434
 435   gcov_read_summary (&summary);
 436   printf (" checksum=0x%08x", summary.checksum);
 437
 438   for (ix = 0; ix != GCOV_COUNTERS_SUMMABLE; ix++)
 439     {
 440       printf ("\n");
 441       print_prefix (filename, 0, 0);
 442       printf ("\t\tcounts=%u, runs=%u",
 443               summary.ctrs[ix].num, summary.ctrs[ix].runs);
 444
 445       printf (", sum_all=" HOST_WIDEST_INT_PRINT_DEC,
 446               (HOST_WIDEST_INT)summary.ctrs[ix].sum_all);
 447       printf (", run_max=" HOST_WIDEST_INT_PRINT_DEC,
 448               (HOST_WIDEST_INT)summary.ctrs[ix].run_max);
 449       printf (", sum_max=" HOST_WIDEST_INT_PRINT_DEC,
 450               (HOST_WIDEST_INT)summary.ctrs[ix].sum_max);
 451     }
 452 }