MPD
poison.h
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1 /*
2  * Copyright (C) 2003-2010 The Music Player Daemon Project
3  * http://www.musicpd.org
4  *
5  * This program 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 of the License, or
8  * (at your option) any later version.
9  *
10  * This program 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 along
16  * with this program; if not, write to the Free Software Foundation, Inc.,
17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18  */
19 
20 #ifndef MPD_POISON_H
21 #define MPD_POISON_H
22 
23 #include "check.h"
24 
25 #ifndef NDEBUG
26 
27 #ifdef HAVE_VALGRIND_MEMCHECK_H
28 #include <valgrind/memcheck.h>
29 #endif
30 
31 #include <string.h>
32 #endif
33 
40 static inline void
41 poison_noaccess(void *p, size_t length)
42 {
43 #ifdef NDEBUG
44  (void)p;
45  (void)length;
46 #else
47  memset(p, 0x01, length);
48 
49 #ifdef HAVE_VALGRIND_MEMCHECK_H
50  (void)VALGRIND_MAKE_MEM_NOACCESS(p, length);
51 #endif
52 #endif
53 }
54 
61 static inline void
62 poison_undefined(void *p, size_t length)
63 {
64 #ifdef NDEBUG
65  (void)p;
66  (void)length;
67 #else
68  memset(p, 0x02, length);
69 
70 #ifdef HAVE_VALGRIND_MEMCHECK_H
71  (void)VALGRIND_MAKE_MEM_UNDEFINED(p, length);
72 #endif
73 #endif
74 }
75 
76 
77 #endif