libiberty/testsuite/demangler-fuzzer.c

   1 /* Demangler fuzzer.
   2
   3    Copyright (C) 2014-2021 Free Software Foundation, Inc.
   4
   5    This file is part of GNU libiberty.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <unistd.h>
  23 #include <time.h>
  24 #include "demangle.h"
  25
  26 #define MAXLEN 253
  27 #define ALPMIN 33
  28 #define ALPMAX 127
  29
  30 static char *program_name;
  31
  32 #define DEFAULT_MAXCOUNT 7500000
  33
  34 static void
  35 print_usage (FILE *fp, int exit_value)
  36 {
  37   fprintf (fp, "Usage: %s [OPTION]...\n", program_name);
  38   fprintf (fp, "Options:\n");
  39   fprintf (fp, "  -h           Display this message.\n");
  40   fprintf (fp, "  -s SEED      Select the random seed to be used.\n");
  41   fprintf (fp, "               The default is to base one on the");
  42   fprintf (fp, " current time.\n");
  43   fprintf (fp, "  -m MAXCOUNT  Exit after MAXCOUNT symbols.\n");
  44   fprintf (fp, "               The default is %d.", DEFAULT_MAXCOUNT);
  45   fprintf (fp, " Set to `-1' for no limit.\n");
  46
  47   exit (exit_value);
  48 }
  49
  50 int
  51 main (int argc, char *argv[])
  52 {
  53   char symbol[2 + MAXLEN + 1] = "_Z";
  54   int seed = -1, seed_set = 0;
  55   int count = 0, maxcount = DEFAULT_MAXCOUNT;
  56   int optchr;
  57
  58   program_name = argv[0];
  59
  60   do
  61     {
  62       optchr = getopt (argc, argv, "hs:m:t:");
  63       switch (optchr)
  64         {
  65         case '?':  /* Unrecognized option.  */
  66           print_usage (stderr, 1);
  67           break;
  68
  69         case 'h':
  70           print_usage (stdout, 0);
  71           break;
  72
  73         case 's':
  74           seed = atoi (optarg);
  75           seed_set = 1;
  76           break;
  77
  78         case 'm':
  79           maxcount = atoi (optarg);
  80           break;
  81         }
  82     }
  83   while (optchr != -1);
  84
  85   if (!seed_set)
  86     seed = time (NULL);
  87   srand (seed);
  88   printf ("%s: seed = %d\n", program_name, seed);
  89
  90   while (maxcount < 0 || count < maxcount)
  91     {
  92       char *buffer = symbol + 2;
  93       int length, i;
  94
  95       length = rand () % MAXLEN;
  96       for (i = 0; i < length; i++)
  97         *buffer++ = (rand () % (ALPMAX - ALPMIN)) + ALPMIN;
  98
  99       *buffer++ = '\0';
 100
 101       cplus_demangle (symbol, DMGL_AUTO | DMGL_ANSI | DMGL_PARAMS);
 102
 103       count++;
 104     }
 105
 106   printf ("%s: successfully demangled %d symbols\n", program_name, count);
 107   exit (0);
 108 }