| /* $Id$ */ |
| /* |
| * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com) |
| * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| #include <pj/assert.h> |
| #include <pj/string.h> |
| |
| #if PJ_SAFE_POOL |
| # define SIG_SIZE sizeof(pj_uint32_t) |
| |
| static void apply_signature(void *p, pj_size_t size); |
| static void check_pool_signature(void *p, pj_size_t size); |
| |
| # define APPLY_SIG(p,sz) apply_signature(p,sz), \ |
| p=(void*)(((char*)p)+SIG_SIZE) |
| # define REMOVE_SIG(p,sz) check_pool_signature(p,sz), \ |
| p=(void*)(((char*)p)-SIG_SIZE) |
| |
| # define SIG_BEGIN 0x600DC0DE |
| # define SIG_END 0x0BADC0DE |
| |
| static void apply_signature(void *p, pj_size_t size) |
| { |
| pj_uint32_t sig; |
| |
| sig = SIG_BEGIN; |
| pj_memcpy(p, &sig, SIG_SIZE); |
| |
| sig = SIG_END; |
| pj_memcpy(((char*)p)+SIG_SIZE+size, &sig, SIG_SIZE); |
| } |
| |
| static void check_pool_signature(void *p, pj_size_t size) |
| { |
| pj_uint32_t sig; |
| pj_uint8_t *mem = (pj_uint8_t*)p; |
| |
| /* Check that signature at the start of the block is still intact */ |
| sig = SIG_BEGIN; |
| pj_assert(!pj_memcmp(mem-SIG_SIZE, &sig, SIG_SIZE)); |
| |
| /* Check that signature at the end of the block is still intact. |
| * Note that "mem" has been incremented by SIG_SIZE |
| */ |
| sig = SIG_END; |
| pj_assert(!pj_memcmp(mem+size, &sig, SIG_SIZE)); |
| } |
| |
| #else |
| # define SIG_SIZE 0 |
| # define APPLY_SIG(p,sz) |
| # define REMOVE_SIG(p,sz) |
| #endif |