gcc/gcov-dump.c

   1 /* Dump a gcov file, for debugging use.
   2    Copyright (C) 2002, 2003 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 2, 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 COPYING.  If not, write to
  17 the Free Software Foundation, 59 Temple Place - Suite 330,
  18 Boston, MA 02111-1307, USA.  */
  19
  20 #include "config.h"
  21 #include "system.h"
  22 #include "coretypes.h"
  23 #include "tm.h"
  24 #include "version.h"
  25 #include <getopt.h>
  26 #define IN_GCOV (-1)
  27 #include "gcov-io.h"
  28 #include "gcov-io.c"
  29
  30 static void dump_file (const char *);
  31 static void print_prefix (const char *, unsigned, gcov_position_t);
  32 static void print_usage (void);
  33 static void print_version (void);
  34 static void tag_function (const char *, unsigned, unsigned);
  35 static void tag_blocks (const char *, unsigned, unsigned);
  36 static void tag_arcs (const char *, unsigned, unsigned);
  37 static void tag_lines (const char *, unsigned, unsigned);
  38 static void tag_counters (const char *, unsigned, unsigned);
  39 static void tag_summary (const char *, unsigned, unsigned);
  40 extern int main (int, char **);
  41
  42 typedef struct tag_format
  43 {
  44   unsigned tag;
  45   char const *name;
  46   void (*proc) (const char *, unsigned, unsigned);
  47 } tag_format_t;
  48
  49 static int flag_dump_contents = 0;
  50 static int flag_dump_positions = 0;
  51
  52 static const struct option options[] =
  53 {
  54   { "help",                 no_argument,       NULL, 'h' },
  55   { "version",              no_argument,       NULL, 'v' },
  56   { "long",                 no_argument,       NULL, 'l' },
  57   { "positions",            no_argument,       NULL, 'o' },
  58   { 0, 0, 0, 0 }
  59 };
  60
  61 static const tag_format_t tag_table[] =
  62 {
  63   {0, "NOP", NULL},
  64   {0, "UNKNOWN", NULL},
  65   {0, "COUNTERS", tag_counters},
  66   {GCOV_TAG_FUNCTION, "FUNCTION", tag_function},
  67   {GCOV_TAG_BLOCKS, "BLOCKS", tag_blocks},
  68   {GCOV_TAG_ARCS, "ARCS", tag_arcs},
  69   {GCOV_TAG_LINES, "LINES", tag_lines},
  70   {GCOV_TAG_OBJECT_SUMMARY, "OBJECT_SUMMARY", tag_summary},
  71   {GCOV_TAG_PROGRAM_SUMMARY, "PROGRAM_SUMMARY", tag_summary},
  72   {0, NULL, NULL}
  73 };
  74
  75 int
  76 main (int argc ATTRIBUTE_UNUSED, char **argv)
  77 {
  78   int opt;
  79
  80   while ((opt = getopt_long (argc, argv, "hlpv", options, NULL)) != -1)
  81     {
  82       switch (opt)
  83         {
  84         case 'h':
  85           print_usage ();
  86           break;
  87         case 'v':
  88           print_version ();
  89           break;
  90         case 'l':
  91           flag_dump_contents = 1;
  92           break;
  93         case 'p':
  94           flag_dump_positions = 1;
  95           break;
  96         default:
  97           fprintf (stderr, "unknown flag `%c'\n", opt);
  98         }
  99     }
 100
 101   while (argv[optind])
 102     dump_file (argv[optind++]);
 103   return 0;
 104 }
 105
 106 static void
 107 print_usage (void)
 108 {
 109   printf ("Usage: gcov-dump [OPTION] ... gcovfiles\n");
 110   printf ("Print coverage file contents\n");
 111   printf ("  -h, --help           Print this help\n");
 112   printf ("  -v, --version        Print version number\n");
 113   printf ("  -l, --long           Dump record contents too\n");
 114   printf ("  -p, --positions      Dump record positions\n");
 115 }
 116
 117 static void
 118 print_version (void)
 119 {
 120   char v[4];
 121   unsigned version = GCOV_VERSION;
 122   unsigned ix;
 123
 124   for (ix = 4; ix--; version >>= 8)
 125     v[ix] = version;
 126   printf ("gcov %.4s (GCC %s)\n", v, version_string);
 127   printf ("Copyright (C) 2002 Free Software Foundation, Inc.\n");
 128   printf ("This is free software; see the source for copying conditions.  There is NO\n\
 129 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\n");
 130 }
 131
 132 static void
 133 print_prefix (const char *filename, unsigned depth, gcov_position_t position)
 134 {
 135   static const char prefix[] = "    ";
 136
 137   printf ("%s:", filename);
 138   if (flag_dump_positions)
 139     printf ("%lu:", (unsigned long) position);
 140   printf ("%.*s", (int) depth, prefix);
 141 }
 142
 143 static void
 144 dump_file (const char *filename)
 145 {
 146   unsigned tags[4];
 147   unsigned depth = 0;
 148
 149   if (!gcov_open (filename, 1))
 150     {
 151       fprintf (stderr, "%s:cannot open\n", filename);
 152       return;
 153     }
 154
 155   /* magic */
 156   {
 157     unsigned magic = gcov_read_unsigned ();
 158     unsigned version;
 159     const char *type = NULL;
 160     int endianness = 0;
 161
 162     if ((endianness = gcov_magic (magic, GCOV_DATA_MAGIC)))
 163       type = "data";
 164     else if ((endianness = gcov_magic (magic, GCOV_NOTE_MAGIC)))
 165       type = "note";
 166     else
 167       {
 168         printf ("%s:not a gcov file\n", filename);
 169         gcov_close ();
 170         return;
 171       }
 172     version = gcov_read_unsigned ();
 173
 174     printf ("%s:%s:magic `%.4s':version `%.4s'%s\n", filename, type,
 175             (const char *)&magic, (const char *)&version,
 176             endianness < 0 ? " (swapped endianness)" : "");
 177     if (version != GCOV_VERSION)
 178       {
 179         unsigned expected = GCOV_VERSION;
 180
 181         printf ("%s:warning:current version is `%.4s'\n", filename,
 182                 (const char *)expected);
 183       }
 184   }
 185
 186   /* stamp */
 187   {
 188     unsigned stamp = gcov_read_unsigned ();
 189
 190     printf ("%s:stamp %lu\n", filename, (unsigned long)stamp);
 191   }
 192
 193   while (1)
 194     {
 195       gcov_position_t base, position = gcov_position ();
 196       unsigned tag, length;
 197       tag_format_t const *format;
 198       unsigned tag_depth;
 199       int error;
 200       unsigned mask;
 201
 202       tag = gcov_read_unsigned ();
 203       if (!tag)
 204         break;
 205       length = gcov_read_unsigned ();
 206       base = gcov_position ();
 207       mask = GCOV_TAG_MASK (tag) >> 1;
 208       for (tag_depth = 4; mask; mask >>= 8)
 209         {
 210           if ((mask & 0xff) != 0xff)
 211             {
 212               printf ("%s:tag `%08x' is invalid\n", filename, tag);
 213               break;
 214             }
 215           tag_depth--;
 216         }
 217       for (format = tag_table; format->name; format++)
 218         if (format->tag == tag)
 219           goto found;
 220       format = &tag_table[GCOV_TAG_IS_COUNTER (tag) ? 2 : 1];
 221     found:;
 222       if (tag)
 223         {
 224           if (depth && depth < tag_depth)
 225             {
 226               if (!GCOV_TAG_IS_SUBTAG (tags[depth - 1], tag))
 227                 printf ("%s:tag `%08x' is incorrectly nested\n",
 228                         filename, tag);
 229             }
 230           depth = tag_depth;
 231           tags[depth - 1] = tag;
 232         }
 233
 234       print_prefix (filename, tag_depth, position);
 235       printf ("%08x:%4u:%s", tag, length, format->name);
 236       if (format->proc)
 237         (*format->proc) (filename, tag, length);
 238
 239       printf ("\n");
 240       if (flag_dump_contents && format->proc)
 241         {
 242           unsigned long actual_length = gcov_position () - base;
 243
 244           if (actual_length > length)
 245             printf ("%s:record size mismatch %lu bytes overread\n",
 246                     filename, actual_length - length);
 247           else if (length > actual_length)
 248             printf ("%s:record size mismatch %lu bytes unread\n",
 249                     filename, length - actual_length);
 250         }
 251       gcov_sync (base, length);
 252       if ((error = gcov_is_error ()))
 253         {
 254           printf (error < 0 ? "%s:counter overflow at %lu\n" :
 255                   "%s:read error at %lu\n", filename,
 256                   (long unsigned) gcov_position ());
 257           break;
 258         }
 259     }
 260   if (!gcov_is_eof ())
 261     printf ("%s:early end of file\n", filename);
 262   gcov_close ();
 263 }
 264
 265 static void
 266 tag_function (const char *filename ATTRIBUTE_UNUSED,
 267               unsigned tag ATTRIBUTE_UNUSED, unsigned length ATTRIBUTE_UNUSED)
 268 {
 269   unsigned long pos = gcov_position ();
 270
 271   printf (" ident=%u", gcov_read_unsigned ());
 272   printf (", checksum=0x%08x", gcov_read_unsigned ());
 273
 274   if (gcov_position () - pos < length)
 275     {
 276       const char *name;
 277
 278       name = gcov_read_string ();
 279       printf (", `%s'", name ? name : "NULL");
 280       name = gcov_read_string ();
 281       printf (" %s", name ? name : "NULL");
 282       printf (":%u", gcov_read_unsigned ());
 283     }
 284 }
 285
 286 static void
 287 tag_blocks (const char *filename ATTRIBUTE_UNUSED,
 288             unsigned tag ATTRIBUTE_UNUSED, unsigned length ATTRIBUTE_UNUSED)
 289 {
 290   unsigned n_blocks = length / 4;
 291
 292   printf (" %u blocks", n_blocks);
 293
 294   if (flag_dump_contents)
 295     {
 296       unsigned ix;
 297
 298       for (ix = 0; ix != n_blocks; ix++)
 299         {
 300           if (!(ix & 7))
 301             {
 302               printf ("\n");
 303               print_prefix (filename, 0, gcov_position ());
 304               printf ("\t\t%u", ix);
 305             }
 306           printf (" %04x", gcov_read_unsigned ());
 307         }
 308     }
 309 }
 310
 311 static void
 312 tag_arcs (const char *filename ATTRIBUTE_UNUSED,
 313           unsigned tag ATTRIBUTE_UNUSED, unsigned length ATTRIBUTE_UNUSED)
 314 {
 315   unsigned n_arcs = (length - 4) / 8;
 316
 317   printf (" %u arcs", n_arcs);
 318   if (flag_dump_contents)
 319     {
 320       unsigned ix;
 321       unsigned blockno = gcov_read_unsigned ();
 322
 323       for (ix = 0; ix != n_arcs; ix++)
 324         {
 325           unsigned dst, flags;
 326
 327           if (!(ix & 3))
 328             {
 329               printf ("\n");
 330               print_prefix (filename, 0, gcov_position ());
 331               printf ("\tblock %u:", blockno);
 332             }
 333           dst = gcov_read_unsigned ();
 334           flags = gcov_read_unsigned ();
 335           printf (" %u:%04x", dst, flags);
 336         }
 337     }
 338 }
 339
 340 static void
 341 tag_lines (const char *filename ATTRIBUTE_UNUSED,
 342            unsigned tag ATTRIBUTE_UNUSED, unsigned length ATTRIBUTE_UNUSED)
 343 {
 344   if (flag_dump_contents)
 345     {
 346       unsigned blockno = gcov_read_unsigned ();
 347       char const *sep = NULL;
 348
 349       while (1)
 350         {
 351           gcov_position_t position = gcov_position ();
 352           const char *source = NULL;
 353           unsigned lineno = gcov_read_unsigned ();
 354
 355           if (!lineno)
 356             {
 357               source = gcov_read_string ();
 358               if (!source)
 359                 break;
 360               sep = NULL;
 361             }
 362
 363           if (!sep)
 364             {
 365               printf ("\n");
 366               print_prefix (filename, 0, position);
 367               printf ("\tblock %u:", blockno);
 368               sep = "";
 369             }
 370           if (lineno)
 371             {
 372               printf ("%s%u", sep, lineno);
 373               sep = ", ";
 374             }
 375           else
 376             {
 377               printf ("%s`%s'", sep, source);
 378               sep = ":";
 379             }
 380         }
 381     }
 382 }
 383
 384 static void
 385 tag_counters (const char *filename ATTRIBUTE_UNUSED,
 386               unsigned tag ATTRIBUTE_UNUSED, unsigned length ATTRIBUTE_UNUSED)
 387 {
 388   static const char *const counter_names[] = GCOV_COUNTER_NAMES;
 389   unsigned n_counts = length / 8;
 390
 391   printf (" %s %u counts",
 392           counter_names[GCOV_COUNTER_FOR_TAG (tag)], n_counts);
 393   if (flag_dump_contents)
 394     {
 395       unsigned ix;
 396
 397       for (ix = 0; ix != n_counts; ix++)
 398         {
 399           gcov_type count;
 400
 401           if (!(ix & 7))
 402             {
 403               printf ("\n");
 404               print_prefix (filename, 0, gcov_position ());
 405               printf ("\t\t%u", ix);
 406             }
 407
 408           count = gcov_read_counter ();
 409           printf (" ");
 410           printf (HOST_WIDEST_INT_PRINT_DEC, count);
 411         }
 412     }
 413 }
 414
 415 static void
 416 tag_summary (const char *filename ATTRIBUTE_UNUSED,
 417              unsigned tag ATTRIBUTE_UNUSED, unsigned length ATTRIBUTE_UNUSED)
 418 {
 419   struct gcov_summary summary;
 420   unsigned ix;
 421
 422   gcov_read_summary (&summary);
 423   printf (" checksum=0x%08x", summary.checksum);
 424
 425   for (ix = 0; ix != GCOV_COUNTERS; ix++)
 426     {
 427       printf ("\n");
 428       print_prefix (filename, 0, 0);
 429       printf ("\t\tcounts=%u, runs=%u",
 430               summary.ctrs[ix].num, summary.ctrs[ix].runs);
 431
 432       printf (", sum_all=" HOST_WIDEST_INT_PRINT_DEC,
 433               (HOST_WIDEST_INT)summary.ctrs[ix].sum_all);
 434       printf (", run_max=" HOST_WIDEST_INT_PRINT_DEC,
 435               (HOST_WIDEST_INT)summary.ctrs[ix].run_max);
 436       printf (", sum_max=" HOST_WIDEST_INT_PRINT_DEC,
 437               (HOST_WIDEST_INT)summary.ctrs[ix].sum_max);
 438     }
 439 }