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/*
* Copyright (C) 2003-2014 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef MPD_POISON_H
#define MPD_POISON_H
#include "check.h"
#ifndef NDEBUG
#ifdef HAVE_VALGRIND_MEMCHECK_H
#include <valgrind/memcheck.h>
#endif
#include <string.h>
#endif
/**
* Poisons the specified memory area and marks it as "not accessible".
*
* @param p pointer to the memory area
* @param length number of bytes to poison
*/
static inline void
poison_noaccess(void *p, size_t length)
{
#ifdef NDEBUG
(void)p;
(void)length;
#else
memset(p, 0x01, length);
#ifdef HAVE_VALGRIND_MEMCHECK_H
(void)VALGRIND_MAKE_MEM_NOACCESS(p, length);
#endif
#endif
}
/**
* Poisons the specified memory area and marks it as "not defined".
*
* @param p pointer to the memory area
* @param length number of bytes to poison
*/
static inline void
poison_undefined(void *p, size_t length)
{
#ifdef NDEBUG
(void)p;
(void)length;
#else
memset(p, 0x02, length);
#ifdef HAVE_VALGRIND_MEMCHECK_H
(void)VALGRIND_MAKE_MEM_UNDEFINED(p, length);
#endif
#endif
}
#endif
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