473 lines
17 KiB
C
473 lines
17 KiB
C
/*
|
|
zone.c - zone memory allocation from DarkPlaces
|
|
Copyright (C) 2007 Uncle Mike
|
|
|
|
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 3 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.
|
|
*/
|
|
|
|
#include "common.h"
|
|
|
|
#define MEMCLUMPSIZE (65536 - 1536) // give malloc padding so we can't waste most of a page at the end
|
|
#define MEMUNIT 8 // smallest unit we care about is this many bytes
|
|
#define MEMBITS (MEMCLUMPSIZE / MEMUNIT)
|
|
#define MEMBITINTS (MEMBITS / 32)
|
|
|
|
#define MEMCLUMP_SENTINEL 0xABADCAFE
|
|
#define MEMHEADER_SENTINEL1 0xDEADF00D
|
|
#define MEMHEADER_SENTINEL2 0xDF
|
|
|
|
typedef struct memheader_s
|
|
{
|
|
struct memheader_s *next; // next and previous memheaders in chain belonging to pool
|
|
struct memheader_s *prev;
|
|
struct mempool_s *pool; // pool this memheader belongs to
|
|
struct memclump_s *clump; // clump this memheader lives in, NULL if not in a clump
|
|
size_t size; // size of the memory after the header (excluding header and sentinel2)
|
|
const char *filename; // file name and line where Mem_Alloc was called
|
|
uint fileline;
|
|
uint sentinel1; // should always be MEMHEADER_SENTINEL1
|
|
|
|
// immediately followed by data, which is followed by a MEMHEADER_SENTINEL2 byte
|
|
} memheader_t;
|
|
|
|
typedef struct memclump_s
|
|
{
|
|
byte block[MEMCLUMPSIZE];// contents of the clump
|
|
uint sentinel1; // should always be MEMCLUMP_SENTINEL
|
|
int bits[MEMBITINTS]; // if a bit is on, it means that the MEMUNIT bytes it represents are allocated, otherwise free
|
|
uint sentinel2; // should always be MEMCLUMP_SENTINEL
|
|
size_t blocksinuse; // if this drops to 0, the clump is freed
|
|
size_t largestavailable; // largest block of memory available
|
|
struct memclump_s *chain; // next clump in the chain
|
|
} memclump_t;
|
|
|
|
typedef struct mempool_s
|
|
{
|
|
uint sentinel1; // should always be MEMHEADER_SENTINEL1
|
|
struct memheader_s *chain; // chain of individual memory allocations
|
|
struct memclump_s *clumpchain; // chain of clumps (if any)
|
|
size_t totalsize; // total memory allocated in this pool (inside memheaders)
|
|
size_t realsize; // total memory allocated in this pool (actual malloc total)
|
|
size_t lastchecksize; // updated each time the pool is displayed by memlist
|
|
struct mempool_s *next; // linked into global mempool list
|
|
const char *filename; // file name and line where Mem_AllocPool was called
|
|
int fileline;
|
|
char name[64]; // name of the pool
|
|
uint sentinel2; // should always be MEMHEADER_SENTINEL1
|
|
} mempool_t;
|
|
|
|
mempool_t *poolchain = NULL; // critical stuff
|
|
|
|
void *_Mem_Alloc( byte *poolptr, size_t size, const char *filename, int fileline )
|
|
{
|
|
int i, j, k, needed, endbit, largest;
|
|
memclump_t *clump, **clumpchainpointer;
|
|
memheader_t *mem;
|
|
mempool_t *pool = (mempool_t *)((byte *)poolptr);
|
|
|
|
if( size <= 0 ) return NULL;
|
|
if( poolptr == NULL ) Sys_Error( "Mem_Alloc: pool == NULL (alloc at %s:%i)\n", filename, fileline );
|
|
pool->totalsize += size;
|
|
|
|
if( size < 4096 )
|
|
{
|
|
// clumping
|
|
needed = ( sizeof( memheader_t ) + size + sizeof( int ) + (MEMUNIT - 1)) / MEMUNIT;
|
|
endbit = MEMBITS - needed;
|
|
for( clumpchainpointer = &pool->clumpchain; *clumpchainpointer; clumpchainpointer = &(*clumpchainpointer)->chain )
|
|
{
|
|
clump = *clumpchainpointer;
|
|
if( clump->sentinel1 != MEMCLUMP_SENTINEL )
|
|
Sys_Error( "Mem_Alloc: trashed clump sentinel 1 (alloc at %s:%d)\n", filename, fileline );
|
|
if( clump->sentinel2 != MEMCLUMP_SENTINEL )
|
|
Sys_Error( "Mem_Alloc: trashed clump sentinel 2 (alloc at %s:%d)\n", filename, fileline );
|
|
if( clump->largestavailable >= needed )
|
|
{
|
|
largest = 0;
|
|
for( i = 0; i < endbit; i++ )
|
|
{
|
|
if( clump->bits[i>>5] & (1 << (i & 31)))
|
|
continue;
|
|
k = i + needed;
|
|
for( j = i; i < k; i++ )
|
|
if( clump->bits[i>>5] & (1 << (i & 31)))
|
|
goto loopcontinue;
|
|
goto choseclump;
|
|
loopcontinue:;
|
|
if( largest < j - i )
|
|
largest = j - i;
|
|
}
|
|
// since clump falsely advertised enough space (nothing wrong
|
|
// with that), update largest count to avoid wasting time in
|
|
// later allocations
|
|
clump->largestavailable = largest;
|
|
}
|
|
}
|
|
|
|
pool->realsize += sizeof( memclump_t );
|
|
clump = malloc( sizeof( memclump_t ));
|
|
if( clump == NULL ) Sys_Error( "Mem_Alloc: out of memory (alloc at %s:%i)\n", filename, fileline );
|
|
_Q_memset( clump, 0, sizeof( memclump_t ), filename, fileline );
|
|
*clumpchainpointer = clump;
|
|
clump->sentinel1 = MEMCLUMP_SENTINEL;
|
|
clump->sentinel2 = MEMCLUMP_SENTINEL;
|
|
clump->chain = NULL;
|
|
clump->blocksinuse = 0;
|
|
clump->largestavailable = MEMBITS - needed;
|
|
j = 0;
|
|
choseclump:
|
|
mem = (memheader_t *)((byte *)clump->block + j * MEMUNIT );
|
|
mem->clump = clump;
|
|
clump->blocksinuse += needed;
|
|
|
|
for( i = j + needed; j < i; j++ )
|
|
clump->bits[j >> 5] |= (1 << (j & 31));
|
|
}
|
|
else
|
|
{
|
|
// big allocations are not clumped
|
|
pool->realsize += sizeof( memheader_t ) + size + sizeof( int );
|
|
mem = (memheader_t *)malloc( sizeof( memheader_t ) + size + sizeof( int ));
|
|
if( mem == NULL ) Sys_Error( "Mem_Alloc: out of memory (alloc at %s:%i)\n", filename, fileline );
|
|
mem->clump = NULL;
|
|
}
|
|
|
|
mem->filename = filename;
|
|
mem->fileline = fileline;
|
|
mem->size = size;
|
|
mem->pool = pool;
|
|
mem->sentinel1 = MEMHEADER_SENTINEL1;
|
|
// we have to use only a single byte for this sentinel, because it may not be aligned
|
|
// and some platforms can't use unaligned accesses
|
|
*((byte *)mem + sizeof( memheader_t ) + mem->size ) = MEMHEADER_SENTINEL2;
|
|
// append to head of list
|
|
mem->next = pool->chain;
|
|
mem->prev = NULL;
|
|
pool->chain = mem;
|
|
if( mem->next ) mem->next->prev = mem;
|
|
_Q_memset((void *)((byte *)mem + sizeof( memheader_t )), 0, mem->size, filename, fileline );
|
|
|
|
return (void *)((byte *)mem + sizeof( memheader_t ));
|
|
}
|
|
|
|
static const char *Mem_CheckFilename( const char *filename )
|
|
{
|
|
static const char *dummy = "<corrupted>\0";
|
|
const char *out = filename;
|
|
int i;
|
|
|
|
if( !out ) return dummy;
|
|
for( i = 0; i < 32; i++, out++ )
|
|
if( out == '\0' ) break; // valid name
|
|
if( i == 32 ) return dummy;
|
|
return filename;
|
|
}
|
|
|
|
static void Mem_FreeBlock( memheader_t *mem, const char *filename, int fileline )
|
|
{
|
|
int i, firstblock, endblock;
|
|
memclump_t *clump, **clumpchainpointer;
|
|
mempool_t *pool;
|
|
|
|
if( mem->sentinel1 != MEMHEADER_SENTINEL1 )
|
|
{
|
|
mem->filename = Mem_CheckFilename( mem->filename ); // make sure what we don't crash var_args
|
|
Sys_Error( "Mem_Free: trashed header sentinel 1 (alloc at %s:%i, free at %s:%i)\n", mem->filename, mem->fileline, filename, fileline );
|
|
}
|
|
if( *((byte *)mem + sizeof( memheader_t ) + mem->size ) != MEMHEADER_SENTINEL2 )
|
|
{
|
|
mem->filename = Mem_CheckFilename( mem->filename ); // make sure what we don't crash var_args
|
|
Sys_Error( "Mem_Free: trashed header sentinel 2 (alloc at %s:%i, free at %s:%i)\n", mem->filename, mem->fileline, filename, fileline );
|
|
}
|
|
|
|
pool = mem->pool;
|
|
// unlink memheader from doubly linked list
|
|
if(( mem->prev ? mem->prev->next != mem : pool->chain != mem ) || ( mem->next && mem->next->prev != mem ))
|
|
Sys_Error( "Mem_Free: not allocated or double freed (free at %s:%i)\n", filename, fileline );
|
|
|
|
if( mem->prev ) mem->prev->next = mem->next;
|
|
else pool->chain = mem->next;
|
|
|
|
if( mem->next )
|
|
mem->next->prev = mem->prev;
|
|
|
|
// memheader has been unlinked, do the actual free now
|
|
pool->totalsize -= mem->size;
|
|
|
|
if(( clump = mem->clump ) != NULL )
|
|
{
|
|
if( clump->sentinel1 != MEMCLUMP_SENTINEL )
|
|
Sys_Error( "Mem_Free: trashed clump sentinel 1 (free at %s:%i)\n", filename, fileline );
|
|
if( clump->sentinel2 != MEMCLUMP_SENTINEL )
|
|
Sys_Error( "Mem_Free: trashed clump sentinel 2 (free at %s:%i)\n", filename, fileline );
|
|
firstblock = ((byte *)mem - (byte *)clump->block );
|
|
if( firstblock & ( MEMUNIT - 1 ))
|
|
Sys_Error( "Mem_Free: address not valid in clump (free at %s:%i)\n", filename, fileline );
|
|
firstblock /= MEMUNIT;
|
|
endblock = firstblock + ((sizeof( memheader_t ) + mem->size + sizeof( int ) + (MEMUNIT - 1)) / MEMUNIT );
|
|
clump->blocksinuse -= endblock - firstblock;
|
|
|
|
// could use &, but we know the bit is set
|
|
for( i = firstblock; i < endblock; i++ )
|
|
clump->bits[i >> 5] -= (1 << (i & 31));
|
|
if( clump->blocksinuse <= 0 )
|
|
{
|
|
// unlink from chain
|
|
for( clumpchainpointer = &pool->clumpchain; *clumpchainpointer; clumpchainpointer = &(*clumpchainpointer)->chain )
|
|
{
|
|
if (*clumpchainpointer == clump)
|
|
{
|
|
*clumpchainpointer = clump->chain;
|
|
break;
|
|
}
|
|
}
|
|
|
|
pool->realsize -= sizeof( memclump_t );
|
|
_Q_memset( clump, 0xBF, sizeof( memclump_t ), filename, fileline );
|
|
free( clump );
|
|
}
|
|
else
|
|
{
|
|
// clump still has some allocations
|
|
// force re-check of largest available space on next alloc
|
|
clump->largestavailable = MEMBITS - clump->blocksinuse;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
pool->realsize -= sizeof( memheader_t ) + mem->size + sizeof( int );
|
|
free( mem );
|
|
}
|
|
}
|
|
|
|
void _Mem_Free( void *data, const char *filename, int fileline )
|
|
{
|
|
if( data == NULL ) Sys_Error( "Mem_Free: data == NULL (called at %s:%i)\n", filename, fileline );
|
|
Mem_FreeBlock((memheader_t *)((byte *)data - sizeof( memheader_t )), filename, fileline );
|
|
}
|
|
|
|
void *_Mem_Realloc( byte *poolptr, void *memptr, size_t size, const char *filename, int fileline )
|
|
{
|
|
char *nb;
|
|
memheader_t *memhdr = NULL;
|
|
|
|
if( size <= 0 ) return memptr; // no need to reallocate
|
|
|
|
if( memptr )
|
|
{
|
|
memhdr = (memheader_t *)((byte *)memptr - sizeof( memheader_t ));
|
|
if( size == memhdr->size ) return memptr;
|
|
}
|
|
|
|
nb = _Mem_Alloc( poolptr, size, filename, fileline );
|
|
|
|
if( memptr ) // first allocate?
|
|
{
|
|
size_t newsize;
|
|
|
|
// get size of old block
|
|
newsize = memhdr->size < size ? memhdr->size : size; // upper data can be trucnated!
|
|
_Q_memcpy( nb, memptr, newsize, filename, fileline );
|
|
_Mem_Free( memptr, filename, fileline ); // free unused old block
|
|
}
|
|
|
|
return (void *)nb;
|
|
}
|
|
|
|
byte *_Mem_AllocPool( const char *name, const char *filename, int fileline )
|
|
{
|
|
mempool_t *pool;
|
|
|
|
pool = (mempool_t *)malloc( sizeof( mempool_t ));
|
|
if( pool == NULL ) Sys_Error( "Mem_AllocPool: out of memory (allocpool at %s:%i)\n", filename, fileline );
|
|
_Q_memset( pool, 0, sizeof( mempool_t ), filename, fileline );
|
|
|
|
// fill header
|
|
pool->sentinel1 = MEMHEADER_SENTINEL1;
|
|
pool->sentinel2 = MEMHEADER_SENTINEL1;
|
|
pool->filename = filename;
|
|
pool->fileline = fileline;
|
|
pool->chain = NULL;
|
|
pool->totalsize = 0;
|
|
pool->realsize = sizeof( mempool_t );
|
|
Q_strncpy( pool->name, name, sizeof( pool->name ));
|
|
pool->next = poolchain;
|
|
poolchain = pool;
|
|
|
|
return (byte *)((mempool_t *)pool);
|
|
}
|
|
|
|
void _Mem_FreePool( byte **poolptr, const char *filename, int fileline )
|
|
{
|
|
mempool_t *pool = (mempool_t *)((byte *)*poolptr );
|
|
mempool_t **chainaddress;
|
|
|
|
if( pool )
|
|
{
|
|
// unlink pool from chain
|
|
for( chainaddress = &poolchain; *chainaddress && *chainaddress != pool; chainaddress = &((*chainaddress)->next));
|
|
if( *chainaddress != pool) Sys_Error("Mem_FreePool: pool already free (freepool at %s:%i)\n", filename, fileline );
|
|
if( pool->sentinel1 != MEMHEADER_SENTINEL1 ) Sys_Error("Mem_FreePool: trashed pool sentinel 1 (allocpool at %s:%i, freepool at %s:%i)\n", pool->filename, pool->fileline, filename, fileline );
|
|
if( pool->sentinel2 != MEMHEADER_SENTINEL1 ) Sys_Error("Mem_FreePool: trashed pool sentinel 2 (allocpool at %s:%i, freepool at %s:%i)\n", pool->filename, pool->fileline, filename, fileline );
|
|
*chainaddress = pool->next;
|
|
|
|
// free memory owned by the pool
|
|
while( pool->chain ) Mem_FreeBlock( pool->chain, filename, fileline );
|
|
// free the pool itself
|
|
_Q_memset( pool, 0xBF, sizeof( mempool_t ), filename, fileline );
|
|
free( pool );
|
|
*poolptr = NULL;
|
|
}
|
|
}
|
|
|
|
void _Mem_EmptyPool( byte *poolptr, const char *filename, int fileline )
|
|
{
|
|
mempool_t *pool = (mempool_t *)((byte *)poolptr);
|
|
if( poolptr == NULL ) Sys_Error( "Mem_EmptyPool: pool == NULL (emptypool at %s:%i)\n", filename, fileline );
|
|
|
|
if( pool->sentinel1 != MEMHEADER_SENTINEL1 ) Sys_Error( "Mem_EmptyPool: trashed pool sentinel 1 (allocpool at %s:%i, emptypool at %s:%i)\n", pool->filename, pool->fileline, filename, fileline );
|
|
if( pool->sentinel2 != MEMHEADER_SENTINEL1 ) Sys_Error( "Mem_EmptyPool: trashed pool sentinel 2 (allocpool at %s:%i, emptypool at %s:%i)\n", pool->filename, pool->fileline, filename, fileline );
|
|
|
|
// free memory owned by the pool
|
|
while( pool->chain ) Mem_FreeBlock( pool->chain, filename, fileline );
|
|
}
|
|
|
|
qboolean Mem_CheckAlloc( mempool_t *pool, void *data )
|
|
{
|
|
memheader_t *header, *target;
|
|
|
|
if( pool )
|
|
{
|
|
// search only one pool
|
|
target = (memheader_t *)((byte *)data - sizeof(memheader_t));
|
|
for( header = pool->chain; header; header = header->next )
|
|
if( header == target ) return true;
|
|
}
|
|
else
|
|
{
|
|
// search all pools
|
|
for( pool = poolchain; pool; pool = pool->next )
|
|
if( Mem_CheckAlloc( pool, data ))
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/*
|
|
========================
|
|
Check pointer for memory
|
|
========================
|
|
*/
|
|
qboolean Mem_IsAllocatedExt( byte *poolptr, void *data )
|
|
{
|
|
mempool_t *pool = NULL;
|
|
if( poolptr ) pool = (mempool_t *)((byte *)poolptr);
|
|
|
|
return Mem_CheckAlloc( pool, data );
|
|
}
|
|
|
|
void Mem_CheckHeaderSentinels( void *data, const char *filename, int fileline )
|
|
{
|
|
memheader_t *mem;
|
|
|
|
if (data == NULL) Sys_Error( "Mem_CheckSentinels: data == NULL (sentinel check at %s:%i)\n", filename, fileline);
|
|
mem = (memheader_t *)((byte *) data - sizeof(memheader_t));
|
|
if( mem->sentinel1 != MEMHEADER_SENTINEL1 )
|
|
{
|
|
mem->filename = Mem_CheckFilename( mem->filename ); // make sure what we don't crash var_args
|
|
Sys_Error( "Mem_CheckSentinels: trashed header sentinel 1 (block allocated at %s:%i, sentinel check at %s:%i)\n", mem->filename, mem->fileline, filename, fileline);
|
|
}
|
|
if( *((byte *) mem + sizeof(memheader_t) + mem->size) != MEMHEADER_SENTINEL2 )
|
|
{
|
|
mem->filename = Mem_CheckFilename( mem->filename ); // make sure what we don't crash var_args
|
|
Sys_Error( "Mem_CheckSentinels: trashed header sentinel 2 (block allocated at %s:%i, sentinel check at %s:%i)\n", mem->filename, mem->fileline, filename, fileline);
|
|
}
|
|
}
|
|
|
|
static void Mem_CheckClumpSentinels( memclump_t *clump, const char *filename, int fileline )
|
|
{
|
|
// this isn't really very useful
|
|
if( clump->sentinel1 != MEMCLUMP_SENTINEL )
|
|
Sys_Error( "Mem_CheckClumpSentinels: trashed sentinel 1 (sentinel check at %s:%i)\n", filename, fileline );
|
|
if( clump->sentinel2 != MEMCLUMP_SENTINEL )
|
|
Sys_Error( "Mem_CheckClumpSentinels: trashed sentinel 2 (sentinel check at %s:%i)\n", filename, fileline );
|
|
}
|
|
|
|
void _Mem_Check( const char *filename, int fileline )
|
|
{
|
|
memheader_t *mem;
|
|
mempool_t *pool;
|
|
memclump_t *clump;
|
|
|
|
for( pool = poolchain; pool; pool = pool->next )
|
|
{
|
|
if( pool->sentinel1 != MEMHEADER_SENTINEL1 )
|
|
Sys_Error( "Mem_CheckSentinelsGlobal: trashed pool sentinel 1 (allocpool at %s:%i, sentinel check at %s:%i)\n", pool->filename, pool->fileline, filename, fileline );
|
|
if( pool->sentinel2 != MEMHEADER_SENTINEL1 )
|
|
Sys_Error( "Mem_CheckSentinelsGlobal: trashed pool sentinel 2 (allocpool at %s:%i, sentinel check at %s:%i)\n", pool->filename, pool->fileline, filename, fileline );
|
|
}
|
|
|
|
for( pool = poolchain; pool; pool = pool->next )
|
|
for( mem = pool->chain; mem; mem = mem->next )
|
|
Mem_CheckHeaderSentinels((void *)((byte *) mem + sizeof(memheader_t)), filename, fileline );
|
|
|
|
for( pool = poolchain; pool; pool = pool->next )
|
|
for( clump = pool->clumpchain; clump; clump = clump->chain )
|
|
Mem_CheckClumpSentinels( clump, filename, fileline );
|
|
}
|
|
|
|
void Mem_PrintStats( void )
|
|
{
|
|
size_t count = 0, size = 0, realsize = 0;
|
|
mempool_t *pool;
|
|
|
|
Mem_Check();
|
|
for( pool = poolchain; pool; pool = pool->next )
|
|
{
|
|
count++;
|
|
size += pool->totalsize;
|
|
realsize += pool->realsize;
|
|
}
|
|
|
|
Msg( "^3%lu^7 memory pools, totalling: ^1%s\n", (dword)count, Q_memprint( size ));
|
|
Msg( "Total allocated size: ^1%s\n", Q_memprint( realsize ));
|
|
}
|
|
|
|
void Mem_PrintList( size_t minallocationsize )
|
|
{
|
|
mempool_t *pool;
|
|
memheader_t *mem;
|
|
|
|
Mem_Check();
|
|
|
|
Msg( "memory pool list:\n"" ^3size name\n");
|
|
for( pool = poolchain; pool; pool = pool->next )
|
|
{
|
|
// poolnames can contain color symbols, make sure what color is reset
|
|
if( ((long)pool->totalsize - pool->lastchecksize ) != 0 )
|
|
Msg( "%5luk (%5luk actual) %s (^7%+3li byte change)\n", (dword)((pool->totalsize + 1023) / 1024), (dword)((pool->realsize + 1023) / 1024), pool->name, (long)pool->totalsize - pool->lastchecksize );
|
|
else Msg( "%5luk (%5luk actual) %s\n", (dword)((pool->totalsize + 1023) / 1024), (dword)((pool->realsize + 1023) / 1024), pool->name );
|
|
pool->lastchecksize = pool->totalsize;
|
|
for( mem = pool->chain; mem; mem = mem->next )
|
|
if( mem->size >= minallocationsize )
|
|
Msg( "%10lu bytes allocated at %s:%i\n", (dword)mem->size, mem->filename, mem->fileline );
|
|
}
|
|
}
|
|
|
|
/*
|
|
========================
|
|
Memory_Init
|
|
========================
|
|
*/
|
|
void Memory_Init( void )
|
|
{
|
|
poolchain = NULL; // init mem chain
|
|
} |