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/*
** Nofrendo (c) 1998-2000 Matthew Conte (matt@conte.com)
**
**
** This program is free software; you can redistribute it and/or
** modify it under the terms of version 2 of the GNU Library General
** Public License as published by the Free Software Foundation.
**
** 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
** Library General Public License for more details. To obtain a
** copy of the GNU Library General Public License, write to the Free
** Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
**
** Any permitted reproduction of these routines, in whole or in part,
** must bear this legend.
**
**
** memguard.c
**
** memory allocation wrapper routines
**
** NOTE: based on code (c) 1998 the Retrocade group
** $Id: memguard.c,v 1.4 2004/02/20 19:53:39 komadori Exp $
*/
#include "types.h"
/* undefine macro definitions, so we get real calls */
#undef malloc
#undef free
#include <string.h>
#include <stdlib.h>
#if HAVE_INTTYPES_H
# include <inttypes.h>
#else
# if HAVE_STDINT_H
# include <stdint.h>
# endif
#endif
#include "memguard.h"
#include "log.h"
/* Maximum number of allocated blocks at any one time */
#define MAX_BLOCKS 16384
/* Memory block structure */
typedef struct memblock_s
{
void *block_addr;
int block_size;
char *file_name;
int line_num;
} memblock_t;
boolean mem_debug = TRUE; /* debugging flag */
#ifdef NOFRENDO_DEBUG
static int mem_blockcount = 0; /* allocated block count */
static memblock_t *mem_record = NULL;
#define GUARD_STRING "GgUuAaRrDdSsTtRrIiNnGgBbLlOoCcKk"
#define GUARD_LENGTH 64 /* before and after allocated block */
/*
** Check the memory guard to make sure out of bounds writes have not
** occurred.
*/
static boolean mem_checkguardblock(void *data, int guard_size)
{
uint8 *orig, *chk, *blk;
int i, alloc_size;
/* get the original pointer */
orig = (((uint8 *) data) - guard_size);
/* get the size */
alloc_size = *((uint32 *) orig);
/* now skip past the size */
blk = orig + sizeof(uint32);
/* check leading guard string */
chk = GUARD_STRING;
for (i = sizeof(uint32); i < guard_size; i++)
{
if (0 == *chk)
chk = GUARD_STRING;
if (*blk != *chk)
return FALSE;
chk++;
blk++;
}
/* check end of block */
chk = GUARD_STRING;
blk = ((uint8 *) data) + alloc_size;
for (i = 0; i < guard_size; i++)
{
if (0 == *chk)
chk = GUARD_STRING;
if (*blk != *chk)
return FALSE;
chk++;
blk++;
}
/* we're okay! */
return TRUE;
}
/* free a guard block */
static void mem_freeguardblock(void *data, int guard_size)
{
uint8 *orig = (((uint8 *) data) - guard_size);
free(orig);
}
/* fill in the memory guard, advance the pointer to the 'real' memory */
static void *mem_guardblock(int alloc_size, int guard_size)
{
void *orig;
uint8 *blk, *chk;
int i;
/* allocate memory */
orig = calloc(alloc_size + (guard_size * 2), 1);
if (NULL == orig)
return NULL;
blk = ((uint8 *) orig);
/* store the size of the newly allocated block*/
*((uint32 *) blk) = alloc_size;
/* skip past the size */
blk += sizeof(uint32);
/* put guard string at beginning of block */
chk = GUARD_STRING;
for (i = sizeof(uint32); i < guard_size; i++)
{
if (0 == *chk)
chk = GUARD_STRING;
*blk++ = *chk++;
}
/* check end of block */
chk = GUARD_STRING;
blk = guard_size + (uint8 *) orig + alloc_size;
for (i = 0; i < guard_size; i++)
{
if (0 == *chk)
chk = GUARD_STRING;
*blk++ = *chk++;
}
return (void *) (guard_size + (uint8 *) orig);
}
/* Allocate a bunch of memory to keep track of all memory blocks */
static void mem_init(void)
{
if (mem_record)
{
free(mem_record);
mem_record = NULL;
}
mem_record = calloc(MAX_BLOCKS * sizeof(memblock_t), 1);
ASSERT(mem_record);
}
/* add a block of memory to the master record */
static void mem_addblock(void *data, int block_size, char *file, int line)
{
int i;
for (i = 0; i < MAX_BLOCKS; i++)
{
if (NULL == mem_record[i].block_addr)
{
mem_record[i].block_addr = data;
mem_record[i].block_size = block_size;
mem_record[i].file_name = file;
mem_record[i].line_num = line;
return;
}
}
ASSERT_MSG("out of memory blocks.");
}
/* find an entry in the block record and delete it */
static void mem_deleteblock(void *data, char *file, int line)
{
int i;
char fail[256];
for (i = 0; i < MAX_BLOCKS; i++)
{
if (data == mem_record[i].block_addr)
{
if (FALSE == mem_checkguardblock(mem_record[i].block_addr, GUARD_LENGTH))
{
sprintf(fail, "mem_deleteblock 0x%08X at line %d of %s -- block corrupt",
(uint32) data, line, file);
ASSERT_MSG(fail);
}
memset(&mem_record[i], 0, sizeof(memblock_t));
return;
}
}
sprintf(fail, "mem_deleteblock 0x%08X at line %d of %s -- block not found",
(uint32) data, line, file);
ASSERT_MSG(fail);
}
#endif /* NOFRENDO_DEBUG */
/* allocates memory and clears it */
#ifdef NOFRENDO_DEBUG
void *_my_malloc(int size, char *file, int line)
#else
void *_my_malloc(int size)
#endif
{
void *temp;
char fail[256];
#ifdef NOFRENDO_DEBUG
if (NULL == mem_record && FALSE != mem_debug)
mem_init();
if (FALSE != mem_debug)
temp = mem_guardblock(size, GUARD_LENGTH);
else
#endif /* NOFRENDO_DEBUG */
temp = calloc(sizeof(uint8), size);
if (NULL == temp)
{
#ifdef NOFRENDO_DEBUG
sprintf(fail, "malloc: out of memory at line %d of %s. block size: %d\n",
line, file, size);
#else
sprintf(fail, "malloc: out of memory. block size: %d\n", size);
#endif
ASSERT_MSG(fail);
}
#ifdef NOFRENDO_DEBUG
if (FALSE != mem_debug)
mem_addblock(temp, size, file, line);
mem_blockcount++;
#endif
return temp;
}
/* free a pointer allocated with my_malloc */
#ifdef NOFRENDO_DEBUG
void _my_free(void **data, char *file, int line)
#else
void _my_free(void **data)
#endif
{
char fail[256];
if (NULL == data || NULL == *data
|| ((uintptr_t)-1) == (uintptr_t) *data || ((uintptr_t)-1) == (uintptr_t) data)
{
#ifdef NOFRENDO_DEBUG
sprintf(fail, "free: attempted to free NULL pointer at line %d of %s\n",
line, file);
#else
sprintf(fail, "free: attempted to free NULL pointer.\n");
#endif
ASSERT_MSG(fail);
}
#ifdef NOFRENDO_DEBUG
/* if this is true, we are in REAL trouble */
if (0 == mem_blockcount)
{
ASSERT_MSG("free: attempted to free memory when no blocks available");
}
if (FALSE != mem_debug)
mem_deleteblock(*data, file, line);
mem_blockcount--; /* dec our block count */
if (FALSE != mem_debug)
mem_freeguardblock(*data, GUARD_LENGTH);
else
#endif /* NOFRENDO_DEBUG */
free(*data);
*data = NULL; /* NULL our source */
}
/* check for orphaned memory handles */
void mem_checkleaks(void)
{
#ifdef NOFRENDO_DEBUG
int i;
if (FALSE == mem_debug)
return;
if (mem_blockcount)
{
log_printf("memory leak - %d unfreed block%s\n\n", mem_blockcount,
mem_blockcount == 1 ? "" : "s");
for (i = 0; i < MAX_BLOCKS; i++)
{
if (mem_record[i].block_addr)
{
log_printf("addr: 0x%08X, size: %d, line %d of %s%s\n",
(uint32) mem_record[i].block_addr,
mem_record[i].block_size,
mem_record[i].line_num,
mem_record[i].file_name,
(FALSE == mem_checkguardblock(mem_record[i].block_addr, GUARD_LENGTH))
? " -- block corrupt" : "");
}
}
}
else
log_printf("no memory leaks\n");
#endif
}
void mem_checkblocks(void)
{
#ifdef NOFRENDO_DEBUG
int i;
if (FALSE == mem_debug)
return;
for (i = 0; i < MAX_BLOCKS; i++)
{
if (mem_record[i].block_addr)
{
if (FALSE == mem_checkguardblock(mem_record[i].block_addr, GUARD_LENGTH))
{
log_printf("addr: 0x%08X, size: %d, line %d of %s -- block corrupt\n",
(uint32) mem_record[i].block_addr,
mem_record[i].block_size,
mem_record[i].line_num,
mem_record[i].file_name);
}
}
}
#endif /* NOFRENDO_DEBUG */
}
/*
** $Log: memguard.c,v $
** Revision 1.4 2004/02/20 19:53:39 komadori
** Fixed detection of linux framebuffer support. Included xineutils.h in dsputil_mlib.c and added to diff_to_ffmpeg_cvs.txt. Fixed function prototype in dsputil_mlib.c (should be sent back to ffmpeg-dev at some point). Fixed includes in nosefart. Fixed nested comments and includes in goom.
**
** Revision 1.3 2004/02/19 02:50:25 rockyb
** Mandrake patches from
** http://cvs.mandrakesoft.com/cgi-bin/cvsweb.cgi/SPECS/xine-lib/
** via Goetz Waschk who reports:
**
** The amd64 patch (xine-lib-1-rc0a-amd64.patch) sets some conservative
** CFLAGS for amd64,
**
** the lib64 patch (xine-lib-1-rc0a-lib64.patch) replaces hardcoded
** /lib to support the lib64 library dir on amd64,
**
** the directfb patch (xine-lib-1-rc2-no-directfb.patch) adds a
** configure option to disable directfb,
**
** the linuxfb patch (xine-lib-1-rc3a-no-linuxfb.patch) does the same
** for linux framebuffer and
**
** the 64bit fixes patch (xine-lib-1-rc3-64bit-fixes.patch) doesn't
** apply at the moment against the CVS -- demux_ogg.c was not applied.
** it includes some 64 bit pointer and other fixes for 64bit architectures.
** from Gwenole Beauchesne
**
** I haven't tested other than apply and compile.
**
** Revision 1.2 2003/12/05 15:55:01 f1rmb
** cleanup phase II. use xprintf when it's relevant, use xine_xmalloc when it's relevant too. Small other little fix (can't remember). Change few internal function prototype because it xine_t pointer need to be used if some xine's internal sections. NOTE: libdvd{nav,read} is still too noisy, i will take a look to made it quit, without invasive changes. To be continued...
**
** Revision 1.1 2003/01/08 07:04:35 tmmm
** initial import of Nosefart sources
**
** Revision 1.8 2000/06/26 04:54:48 matt
** simplified and made more robust
**
** Revision 1.7 2000/06/12 01:11:41 matt
** cleaned up some error output for win32
**
** Revision 1.6 2000/06/09 15:12:25 matt
** initial revision
**
*/

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