1/* Demangler fuzzer.
2
3   Copyright (C) 2014 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
30static char *program_name;
31
32#define DEFAULT_MAXCOUNT 7500000
33
34static void
35print_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
50int
51main (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}
109