source: zzuf/trunk/src/common/common.h @ 4115

Last change on this file since 4115 was 4115, checked in by sam, 4 years ago

Move process creation stuff to a separate myfork.c file.

  • Property svn:keywords set to Id
File size: 1.6 KB
Line 
1/*
2 *  zzuf - general purpose fuzzer
3 *  Copyright (c) 2006-2009 Sam Hocevar <sam@hocevar.net>
4 *                All Rights Reserved
5 *
6 *  $Id$
7 *
8 *  This program is free software. It comes without any warranty, to
9 *  the extent permitted by applicable law. You can redistribute it
10 *  and/or modify it under the terms of the Do What The Fuck You Want
11 *  To Public License, Version 2, as published by Sam Hocevar. See
12 *  http://sam.zoy.org/wtfpl/COPYING for more details.
13 */
14
15/*
16 *  common.h: default fuzzing settings
17 */
18
19/* We arbitrarily split files into 1024-byte chunks. Each chunk has an
20 * associated seed that can be computed from the zzuf seed, the chunk
21 * index and the fuzziness density. This allows us to predictably fuzz
22 * any part of the file without reading the whole file. */
23#define CHUNKBYTES 1024
24
25/* Default seed is 0. Why not? */
26#define DEFAULT_SEED 0
27
28/* The default fuzzing ratio is, arbitrarily, 0.4%. The minimal fuzzing
29 * ratio is 0.000000001% (less than one bit changed on a whole DVD). */
30#define DEFAULT_RATIO 0.004
31#define MIN_RATIO 0.00000000001
32#define MAX_RATIO 5.0
33
34/* The default maximum memory usage is 1024 MiB. If this value is not set,
35 * zzuf may bring a machine down to its knees because of I/O. */
36#define DEFAULT_MEM 1024
37
38/* We use file descriptor 17 as the debug channel */
39#define DEBUG_FILENO 17
40#define DEBUG_FILENO_STR "17"
41
42struct fuzz
43{
44    uint32_t seed;
45    double ratio;
46    int64_t cur;
47#ifdef HAVE_FGETLN
48    char *tmp;
49#endif
50    int uflag; int64_t upos; uint8_t uchar; /* ungetc stuff */
51    uint8_t data[CHUNKBYTES];
52};
53
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