source: zzuf/trunk/src/libzzuf.c @ 2527

Last change on this file since 2527 was 2527, checked in by Sam Hocevar, 12 years ago
  • Build on HP-UX systems: disable unsupported warning flags, define _XOPEN_SOURCE_EXTENDED where appropriate, use AC_C_INLINE to avoid using the inline keyword when unsupported, and use #pragma INIT for library initialisation routines.
  • Property svn:keywords set to Id
File size: 4.8 KB
Line 
1/*
2 *  zzuf - general purpose fuzzer
3 *  Copyright (c) 2006 Sam Hocevar <sam@zoy.org>
4 *                All Rights Reserved
5 *
6 *  $Id: libzzuf.c 2527 2008-07-15 20:16:06Z sam $
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 *  libzzuf.c: preloaded wrapper library
17 */
18
19#include "config.h"
20#define _GNU_SOURCE
21
22#if defined HAVE_STDINT_H
23#   include <stdint.h>
24#elif defined HAVE_INTTYPES_H
25#   include <inttypes.h>
26#endif
27#if defined HAVE_WINDOWS_H
28#   include <windows.h>
29#endif
30#if defined HAVE_PROCESS_H
31#   include <process.h>
32#endif
33#include <stdio.h>
34#include <sys/types.h>
35#if defined HAVE_UNISTD_H
36#   include <unistd.h>
37#endif
38#include <stdlib.h>
39#include <string.h>
40#include <fcntl.h>
41
42#include <stdarg.h>
43
44#include "libzzuf.h"
45#include "debug.h"
46#include "fd.h"
47#include "sys.h"
48#include "fuzz.h"
49
50/* Library initialisation shit */
51#if defined __GNUC__
52void _zz_init(void) __attribute__((constructor));
53void _zz_fini(void) __attribute__((destructor));
54#elif defined HAVE_PRAGMA_INIT
55#   pragma INIT "_zz_init"
56#   pragma FINI "_zz_fini"
57#endif
58
59#if defined HAVE_WINDOWS_H
60BOOL WINAPI DllMain(HINSTANCE, DWORD, PVOID);
61#endif
62
63/**
64 * Is libzzuf fully initialised?
65 */
66int   _zz_ready    = 0;
67
68/**
69 * The file descriptor used by libzzuf for communication with the main
70 * zzuf program in debug mode. Its value is set by the ZZUF_DEBUG
71 * environment variable.
72 */
73int   _zz_debugfd  = -1;
74
75/**
76 * If set to 1, this boolean variable will prevent the called application
77 * from installing signal handlers that would prevent it from really crashing.
78 * SDL applications often do that when not using SDL_INIT_NOPARACHUTE, for
79 * instance. Its value is set by the ZZUF_SIGNAL environment variable.
80 */
81int   _zz_signal   = 0;
82
83/**
84 * If set to a positive value, this value will indicate the maximum number
85 * of mebibytes (1 MiB = 1,048,576 bytes) that the called application will be
86 * allowed to allocate. Its value is set by the ZZUF_MEMORY environment
87 * variable.
88 */
89int   _zz_memory   = 0;
90
91/**
92 * If set to 1, this boolean will tell libzzuf to fuzz network file
93 * descriptors, too. Its value is set by the ZZUF_NETWORK environment
94 * variable.
95 */
96int   _zz_network  = 0;
97
98/**
99 * Library initialisation routine.
100 *
101 * This function reads all configuration variables put by zzuf in the
102 * called process's environment and initialises diversions for the three
103 * main function families: memory functions (initialised very early because
104 * other functions we need such as dlsym() require them), file descriptor
105 * functions and stream functions.
106 */
107void _zz_init(void)
108{
109    char *tmp, *tmp2;
110
111    tmp = getenv("ZZUF_DEBUG");
112    if(tmp)
113        _zz_debugfd = atoi(tmp);
114
115    /* We need this as soon as possible */
116    _zz_mem_init();
117
118    tmp = getenv("ZZUF_SEED");
119    if(tmp && *tmp)
120        _zz_setseed(atol(tmp));
121
122    tmp = getenv("ZZUF_MINRATIO");
123    tmp2 = getenv("ZZUF_MAXRATIO");
124    if(tmp && *tmp && tmp2 && *tmp2)
125        _zz_setratio(atof(tmp), atof(tmp2));
126
127    tmp = getenv("ZZUF_AUTOINC");
128    if(tmp && *tmp == '1')
129        _zz_setautoinc();
130
131    tmp = getenv("ZZUF_BYTES");
132    if(tmp && *tmp)
133        _zz_bytes(tmp);
134
135    tmp = getenv("ZZUF_LIST");
136    if(tmp && *tmp)
137        _zz_list(tmp);
138
139    tmp = getenv("ZZUF_PORTS");
140    if(tmp && *tmp)
141        _zz_ports(tmp);
142
143    tmp = getenv("ZZUF_PROTECT");
144    if(tmp && *tmp)
145        _zz_protect(tmp);
146
147    tmp = getenv("ZZUF_REFUSE");
148    if(tmp && *tmp)
149        _zz_refuse(tmp);
150
151    tmp = getenv("ZZUF_INCLUDE");
152    if(tmp && *tmp)
153        _zz_include(tmp);
154
155    tmp = getenv("ZZUF_EXCLUDE");
156    if(tmp && *tmp)
157        _zz_exclude(tmp);
158
159    tmp = getenv("ZZUF_SIGNAL");
160    if(tmp && *tmp == '1')
161        _zz_signal = 1;
162
163    tmp = getenv("ZZUF_MEMORY");
164    if(tmp && *tmp == '1')
165        _zz_memory = 1;
166
167    tmp = getenv("ZZUF_NETWORK");
168    if(tmp && *tmp == '1')
169        _zz_network = 1;
170
171    _zz_fd_init();
172    _zz_sys_init();
173
174    tmp = getenv("ZZUF_STDIN");
175    if(tmp && *tmp == '1')
176        _zz_register(0);
177
178    _zz_ready = 1;
179
180    debug("libzzuf initialised for PID %li", (long int)getpid());
181}
182
183/**
184 * Library deinitialisation routine.
185 *
186 * Free all the memory allocated by libzzuf during its lifetime.
187 */
188void _zz_fini(void)
189{
190    _zz_fd_fini();
191}
192
193#if defined HAVE_WINDOWS_H
194BOOL WINAPI DllMain(HINSTANCE hinst, DWORD reason, PVOID impLoad)
195{
196    (void)hinst;   /* unused */
197    (void)impLoad; /* unused */
198
199    switch(reason)
200    {
201        case DLL_PROCESS_ATTACH:
202            _zz_init();
203            break;
204        case DLL_PROCESS_DETACH:
205            _zz_fini();
206            break;
207    }
208
209    return TRUE;
210}
211#endif
212
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