/* * Copyright (C) 2003-2009 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 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 VALGRIND_MAKE_MEM_UNDEFINED(p, length); #endif #endif } #endif