mirror of https://github.com/FWGS/xash3d-fwgs
zone, platform: add swap allocator
This commit is contained in:
parent
114a256675
commit
feb01b270e
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@ -18,6 +18,15 @@ GNU General Public License for more details.
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#define MEMHEADER_SENTINEL1 0xDEADF00D
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#define MEMHEADER_SENTINEL2 0xDF
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#ifdef XASH_CUSTOM_SWAP
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#include "platform/swap/swap.h"
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#define Q_malloc SWAP_Malloc
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#define Q_free SWAP_Free
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#else
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#define Q_malloc malloc
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#define Q_free free
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#endif
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typedef struct memheader_s
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{
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struct memheader_s *next; // next and previous memheaders in chain belonging to pool
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@ -58,7 +67,7 @@ void *_Mem_Alloc( byte *poolptr, size_t size, qboolean clear, const char *filena
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// big allocations are not clumped
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pool->realsize += sizeof( memheader_t ) + size + sizeof( int );
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mem = (memheader_t *)malloc( sizeof( memheader_t ) + size + sizeof( int ));
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mem = (memheader_t *)Q_malloc( sizeof( memheader_t ) + size + sizeof( int ));
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if( mem == NULL ) Sys_Error( "Mem_Alloc: out of memory (alloc at %s:%i)\n", filename, fileline );
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mem->filename = filename;
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@ -74,7 +83,8 @@ void *_Mem_Alloc( byte *poolptr, size_t size, qboolean clear, const char *filena
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mem->prev = NULL;
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pool->chain = mem;
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if( mem->next ) mem->next->prev = mem;
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if( clear ) memset((void *)((byte *)mem + sizeof( memheader_t )), 0, mem->size );
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//if( clear )
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memset((void *)((byte *)mem + sizeof( memheader_t )), 0, mem->size );
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return (void *)((byte *)mem + sizeof( memheader_t ));
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}
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@ -128,7 +138,7 @@ static void Mem_FreeBlock( memheader_t *mem, const char *filename, int fileline
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pool->totalsize -= mem->size;
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pool->realsize -= sizeof( memheader_t ) + mem->size + sizeof( int );
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free( mem );
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Q_free( mem );
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}
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void _Mem_Free( void *data, const char *filename, int fileline )
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@ -166,7 +176,7 @@ byte *_Mem_AllocPool( const char *name, const char *filename, int fileline )
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{
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mempool_t *pool;
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pool = (mempool_t *)malloc( sizeof( mempool_t ));
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pool = (mempool_t *)Q_malloc( sizeof( mempool_t ));
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if( pool == NULL ) Sys_Error( "Mem_AllocPool: out of memory (allocpool at %s:%i)\n", filename, fileline );
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memset( pool, 0, sizeof( mempool_t ));
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@ -203,7 +213,7 @@ void _Mem_FreePool( byte **poolptr, const char *filename, int fileline )
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while( pool->chain ) Mem_FreeBlock( pool->chain, filename, fileline );
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// free the pool itself
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memset( pool, 0xBF, sizeof( mempool_t ));
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free( pool );
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Q_free( pool );
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*poolptr = NULL;
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}
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}
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@ -0,0 +1,488 @@
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/* $NetBSD: malloc.c,v 1.8 1997/04/07 03:12:14 christos Exp $ */
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/*
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* Copyright (c) 1983 Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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#if 0
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static char *sccsid = "from: @(#)malloc.c 5.11 (Berkeley) 2/23/91";
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#else
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static char *rcsid = "$NetBSD: malloc.c,v 1.8 1997/04/07 03:12:14 christos Exp $";
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#endif
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#endif /* LIBC_SCCS and not lint */
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/*
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* malloc.c (Caltech) 2/21/82
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* Chris Kingsley, kingsley@cit-20.
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*
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* This is a very fast storage allocator. It allocates blocks of a small
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* number of different sizes, and keeps free lists of each size. Blocks that
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* don't exactly fit are passed up to the next larger size. In this
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* implementation, the available sizes are 2^n-4 (or 2^n-10) bytes long.
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* This is designed for use in a virtual memory environment.
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*/
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#include <sys/types.h>
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#include <stdlib.h>
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#include <string.h>
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#include "platform/swap/swap.h"
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/* #define MSTATS 1 */
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#ifndef _WIN32
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#include <unistd.h>
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#define NULL 0
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#else
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#define u_char unsigned char
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#define u_long unsigned long
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#define getpagesize() 4096
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#define caddr_t size_t
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#define bcopy(a,b,c) memcpy(b,a,c)
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#endif
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static void morecore(int);
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/*
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* The overhead on a block is at least 4 bytes. When free, this space
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* contains a pointer to the next free block, and the bottom two bits must
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* be zero. When in use, the first byte is set to MAGIC, and the second
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* byte is the size index. The remaining bytes are for alignment.
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* If range checking is enabled then a second word holds the size of the
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* requested block, less 1, rounded up to a multiple of sizeof(RMAGIC).
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* The order of elements is critical: ov_magic must overlay the low order
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* bits of ov_next, and ov_magic can not be a valid ov_next bit pattern.
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*/
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union overhead {
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union overhead *ov_next; /* when free */
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struct {
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u_char ovu_magic; /* magic number */
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u_char ovu_index; /* bucket # */
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#ifdef RCHECK
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u_short ovu_rmagic; /* range magic number */
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u_long ovu_size; /* actual block size */
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#endif
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} ovu;
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#define ov_magic ovu.ovu_magic
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#define ov_index ovu.ovu_index
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#define ov_rmagic ovu.ovu_rmagic
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#define ov_size ovu.ovu_size
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};
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static int findbucket( union overhead *freep,
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int srchlen);
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#define MAGIC 0xef /* magic # on accounting info */
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#define RMAGIC 0x5555 /* magic # on range info */
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#ifdef RCHECK
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#define RSLOP sizeof (u_short)
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#else
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#define RSLOP 0
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#endif
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/*
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* nextf[i] is the pointer to the next free block of size 2^(i+3). The
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* smallest allocatable block is 8 bytes. The overhead information
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* precedes the data area returned to the user.
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*/
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#define NBUCKETS 30
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static union overhead *nextf[NBUCKETS];
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/* extern char *sbrk(); */
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static int pagesz; /* page size */
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static int pagebucket; /* page size bucket */
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#ifdef MSTATS
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/*
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* nmalloc[i] is the difference between the number of mallocs and frees
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* for a given block size.
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*/
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static unsigned int nmalloc[NBUCKETS];
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#include <stdio.h>
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#endif
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#if defined(DEBUG) || defined(RCHECK)
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#define ASSERT(p) if (!(p)) botch(__STRING(p))
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#include /* <stdio.h> */
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static
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botch(s)
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char *s;
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{
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fprintf(stderr, "\r\nassertion botched: %s\r\n", s);
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(void) fflush(stderr); /* just in case user buffered it */
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abort();
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}
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#else
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#define ASSERT(p)
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#endif
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#include <stdio.h>
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/* */
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/* malloc */
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/* malloc */
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void * SWAP_Malloc( size_t nbytes )
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{
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register union overhead *op;
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register int bucket;
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register long n;
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register unsigned amt;
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/*
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* First time malloc is called, setup page size and
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* align break pointer so all data will be page aligned.
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*/
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if (pagesz == 0) {
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pagesz = n = getpagesize();
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op = (union overhead *)SWAP_Sbrk( 0 );
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n = n - sizeof (*op) - ((long)op & (n - 1));
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if (n < 0)
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n += pagesz;
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if (n) {
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if (SWAP_Sbrk(n) == (char *)-1) {
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return (NULL);
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}
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}
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bucket = 0;
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amt = 8;
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while (pagesz > amt) {
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amt <<= 1;
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bucket++;
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}
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pagebucket = bucket;
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}
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/*
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* Convert amount of memory requested into closest block size
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* stored in hash buckets which satisfies request.
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* Account for space used per block for accounting.
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*/
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if (nbytes <= (n = pagesz - sizeof (*op) - RSLOP)) {
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#ifndef RCHECK
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amt = 8; /* size of first bucket */
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bucket = 0;
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#else
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amt = 16; /* size of first bucket */
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bucket = 1;
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#endif
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n = -((long)sizeof (*op) + RSLOP);
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} else {
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amt = pagesz;
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bucket = pagebucket;
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}
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while (nbytes > amt + n) {
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amt <<= 1;
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if (amt == 0) {
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return (NULL);
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}
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bucket++;
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}
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/*
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* If nothing in hash bucket right now,
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* request more memory from the system.
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*/
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if ((op = nextf[bucket]) == NULL) {
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morecore(bucket);
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if ((op = nextf[bucket]) == NULL) {
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return (NULL);
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}
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}
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/* remove from linked list */
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nextf[bucket] = op->ov_next;
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op->ov_magic = MAGIC;
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op->ov_index = bucket;
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#ifdef MSTATS
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nmalloc[bucket]++;
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#endif
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#ifdef RCHECK
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/*
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* Record allocated size of block and
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* bound space with magic numbers.
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*/
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op->ov_size = (nbytes + RSLOP - 1) & ~(RSLOP - 1);
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op->ov_rmagic = RMAGIC;
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*(u_short *)((caddr_t)(op + 1) + op->ov_size) = RMAGIC;
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#endif
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return ((char *)(op + 1));
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}
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void * SWAP_Calloc(size_t nelem, size_t elsize) {
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void * ptr = SWAP_Malloc (nelem * elsize);
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// Zero out the malloc'd block.
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memset (ptr, 0, nelem * elsize);
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return ptr;
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}
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/*
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* Allocate more memory to the indicated bucket.
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*/
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static void
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morecore(int bucket)
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{
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register union overhead *op;
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register long sz; /* size of desired block */
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long amt; /* amount to allocate */
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int nblks; /* how many blocks we get */
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/*
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* sbrk_size <= 0 only for big, FLUFFY, requests (about
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* 2^30 bytes on a VAX, I think) or for a negative arg.
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*/
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sz = 1 << (bucket + 3);
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#ifdef DEBUG
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ASSERT(sz > 0);
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#else
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if (sz <= 0)
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return;
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#endif
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if (sz < pagesz) {
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amt = pagesz;
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nblks = amt / sz;
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} else {
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amt = sz + pagesz;
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nblks = 1;
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}
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op = (union overhead *)SWAP_Sbrk(amt);
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/* no more room! */
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if ((long)op == -1)
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return;
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/*
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* Add new memory allocated to that on
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* free list for this hash bucket.
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*/
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nextf[bucket] = op;
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while (--nblks > 0) {
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op->ov_next = (union overhead *)((caddr_t)op + sz);
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op = (union overhead *)((caddr_t)op + sz);
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}
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}
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/* */
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/* free */
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/* free */
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void SWAP_Free( void *cp)
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{
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register long size;
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register union overhead *op;
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if (cp == NULL)
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return;
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op = (union overhead *)((caddr_t)cp - sizeof (union overhead));
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#ifdef DEBUG
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ASSERT(op->ov_magic == MAGIC); /* make sure it was in use */
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#else
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if (op->ov_magic != MAGIC)
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return; /* sanity */
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#endif
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#ifdef RCHECK
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ASSERT(op->ov_rmagic == RMAGIC);
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ASSERT(*(u_short *)((caddr_t)(op + 1) + op->ov_size) == RMAGIC);
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#endif
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size = op->ov_index;
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ASSERT(size < NBUCKETS);
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op->ov_next = nextf[size]; /* also clobbers ov_magic */
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nextf[size] = op;
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#ifdef MSTATS
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nmalloc[size]--;
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#endif
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}
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/* EDB: added size lookup */
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size_t SWAP_MallocUsableSize(void * cp)
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{
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register long size;
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register union overhead *op;
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if (cp == NULL)
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return 0;
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op = (union overhead *)((caddr_t)cp - sizeof (union overhead));
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#ifdef DEBUG
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ASSERT(op->ov_magic == MAGIC); /* make sure it was in use */
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#else
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if (op->ov_magic != MAGIC)
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return 0; /* sanity */
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#endif
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#ifdef RCHECK
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ASSERT(op->ov_rmagic == RMAGIC);
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ASSERT(*(u_short *)((caddr_t)(op + 1) + op->ov_size) == RMAGIC);
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#endif
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return op->ov_index;
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}
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/* End EDB */
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/*
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* When a program attempts "storage compaction" as mentioned in the
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* old malloc man page, it realloc's an already freed block. Usually
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* this is the last block it freed; occasionally it might be farther
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* back. We have to search all the free lists for the block in order
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* to determine its bucket: 1st we make one pass thru the lists
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* checking only the first block in each; if that fails we search
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* ``realloc_srchlen'' blocks in each list for a match (the variable
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* is extern so the caller can modify it). If that fails we just copy
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* however many bytes was given to realloc() and hope it's not huge.
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*/
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int realloc_srchlen = 4; /* 4 should be plenty, -1 =>'s whole list */
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/* */
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/* realloc */
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/* realloc */
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void *
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SWAP_Realloc( void *cp,
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size_t nbytes)
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{
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register u_long onb;
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register long i;
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union overhead *op;
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char *res;
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int was_alloced = 0;
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if (cp == NULL)
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return (SWAP_Malloc(nbytes));
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if (nbytes == 0) {
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SWAP_Free (cp);
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return NULL;
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}
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op = (union overhead *)((caddr_t)cp - sizeof (union overhead));
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if (op->ov_magic == MAGIC) {
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was_alloced++;
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i = op->ov_index;
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} else {
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/*
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* Already free, doing "compaction".
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*
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* Search for the old block of memory on the
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* free list. First, check the most common
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* case (last element free'd), then (this failing)
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* the last ``realloc_srchlen'' items free'd.
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* If all lookups fail, then assume the size of
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* the memory block being realloc'd is the
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* largest possible (so that all "nbytes" of new
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* memory are copied into). Note that this could cause
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* a memory fault if the old area was tiny, and the moon
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* is gibbous. However, that is very unlikely.
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*/
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if ((i = findbucket(op, 1)) < 0 &&
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(i = findbucket(op, realloc_srchlen)) < 0)
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i = NBUCKETS;
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}
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onb = 1 << (i + 3);
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if (onb < pagesz)
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onb -= sizeof (*op) + RSLOP;
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else
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onb += pagesz - sizeof (*op) - RSLOP;
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/* avoid the copy if same size block */
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if (was_alloced) {
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if (i) {
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i = 1 << (i + 2);
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if (i < pagesz)
|
||||
i -= sizeof (*op) + RSLOP;
|
||||
else
|
||||
i += pagesz - sizeof (*op) - RSLOP;
|
||||
}
|
||||
if (nbytes <= onb && nbytes > i) {
|
||||
#ifdef RCHECK
|
||||
op->ov_size = (nbytes + RSLOP - 1) & ~(RSLOP - 1);
|
||||
*(u_short *)((caddr_t)(op + 1) + op->ov_size) = RMAGIC;
|
||||
#endif
|
||||
return(cp);
|
||||
} else
|
||||
SWAP_Free(cp);
|
||||
}
|
||||
if ((res = SWAP_Malloc(nbytes)) == NULL)
|
||||
return (NULL);
|
||||
if (cp != res) /* common optimization if "compacting" */
|
||||
bcopy(cp, res, (nbytes < onb) ? nbytes : onb);
|
||||
return (res);
|
||||
}
|
||||
|
||||
/*
|
||||
* Search ``srchlen'' elements of each free list for a block whose
|
||||
* header starts at ``freep''. If srchlen is -1 search the whole list.
|
||||
* Return bucket number, or -1 if not found.
|
||||
*/
|
||||
static int
|
||||
findbucket( union overhead *freep,
|
||||
int srchlen)
|
||||
|
||||
{
|
||||
register union overhead *p;
|
||||
register int i, j;
|
||||
|
||||
for (i = 0; i < NBUCKETS; i++) {
|
||||
j = 0;
|
||||
for (p = nextf[i]; p && j != srchlen; p = p->ov_next) {
|
||||
if (p == freep)
|
||||
return (i);
|
||||
j++;
|
||||
}
|
||||
}
|
||||
return (-1);
|
||||
}
|
||||
|
||||
#ifdef MSTATS
|
||||
/*
|
||||
* mstats - print out statistics about malloc
|
||||
*
|
||||
* Prints two lines of numbers, one showing the length of the free list
|
||||
* for each size category, the second showing the number of mallocs -
|
||||
* frees for each size category.
|
||||
*/
|
||||
/* */
|
||||
mstats(void)
|
||||
{
|
||||
register int i, j;
|
||||
register union overhead *p;
|
||||
int totfree = 0,
|
||||
totused = 0;
|
||||
|
||||
fprintf(stderr, "Memory allocation statistics\nfree:\t");
|
||||
for (i = 0; i < NBUCKETS; i++) {
|
||||
for (j = 0, p = nextf[i]; p; p = p->ov_next, j++)
|
||||
;
|
||||
fprintf(stderr, " %d", j);
|
||||
totfree += j * (1 << (i + 3));
|
||||
}
|
||||
fprintf(stderr, "\nused:\t");
|
||||
for (i = 0; i < NBUCKETS; i++) {
|
||||
fprintf(stderr, " %d", nmalloc[i]);
|
||||
totused += nmalloc[i] * (1 << (i + 3));
|
||||
}
|
||||
fprintf(stderr, "\n\tTotal in use: %d, total free: %d, total allocated: %d\n",
|
||||
totused, totfree, totused + totfree);
|
||||
}
|
||||
#endif
|
||||
|
||||
|
|
@ -0,0 +1,108 @@
|
|||
/*
|
||||
sbrk.c - swap memory allocation
|
||||
Copyright (C) 2019 mittorn
|
||||
|
||||
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.
|
||||
*/
|
||||
#define _GNU_SOURCE
|
||||
#include <dlfcn.h>
|
||||
#include <sys/mman.h>
|
||||
#include <unistd.h>
|
||||
#include <sys/types.h>
|
||||
#include <fcntl.h>
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <errno.h>
|
||||
#include <signal.h>
|
||||
#define _GNU_SOURCE
|
||||
#include <dlfcn.h>
|
||||
#include "platform/swap/swap.h"
|
||||
#include "string.h"
|
||||
|
||||
#ifndef XASH_DEFAULT_SWAP_PATH
|
||||
#define XASH_DEFAULT_SWAP_PATH "/tmp/xash3d-swap"
|
||||
#endif
|
||||
#define PAGE_SIZE 4096
|
||||
static struct sbrk_state_s
|
||||
{
|
||||
void *top;
|
||||
int fd;
|
||||
size_t size;
|
||||
size_t prealloc;
|
||||
pid_t pid;
|
||||
} s;
|
||||
|
||||
static void SWAP_Initialize(void)
|
||||
{
|
||||
char *path;
|
||||
char *prealloc = getenv("SWAP_SIZE");
|
||||
int fd;
|
||||
|
||||
if( s.top )
|
||||
return;
|
||||
|
||||
path = getenv("SWAP_PATH");
|
||||
if( !path )
|
||||
path = XASH_DEFAULT_SWAP_PATH;
|
||||
fd = open( path, O_CREAT|O_RDWR, 0600 );
|
||||
|
||||
if( prealloc ) s.prealloc = atoi(prealloc);
|
||||
else s.prealloc = 128*1024*1024;
|
||||
s.prealloc &= ~(PAGE_SIZE - 1);
|
||||
|
||||
s.fd = fd;
|
||||
ftruncate( fd, s.prealloc );
|
||||
s.top = mmap( 0, s.prealloc, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0 );
|
||||
|
||||
// space will be freed on exit
|
||||
//unlink(path);
|
||||
}
|
||||
|
||||
void *SWAP_Sbrk(size_t size)
|
||||
{
|
||||
char buf[64];
|
||||
SWAP_Initialize();
|
||||
|
||||
if( size == 0 )
|
||||
return s.top;
|
||||
else if( size > 0 )
|
||||
{
|
||||
void *res;
|
||||
|
||||
//write(1, buf, snprintf(buf, 32, "allocating %d\n", size) );
|
||||
res = s.top;
|
||||
s.size += size;
|
||||
s.top = res + size;
|
||||
if( s.size + size > s.prealloc )
|
||||
return (void*)-1;
|
||||
|
||||
memset( res, 0, size );
|
||||
return res;
|
||||
|
||||
}
|
||||
else
|
||||
{
|
||||
void *res = s.top;
|
||||
|
||||
if( -size > s.size )
|
||||
res = (void*)-1;
|
||||
else
|
||||
{
|
||||
s.top += size;
|
||||
s.size += size;
|
||||
//write(1, buf, snprintf(buf, 32, "freed %d\n", -size) );
|
||||
}
|
||||
|
||||
return res;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
|
|
@ -0,0 +1,21 @@
|
|||
/*
|
||||
sbrk_swap.h - swap memory allocation
|
||||
Copyright (C) 2019 mittorn
|
||||
|
||||
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 <stdint.h>
|
||||
void *SWAP_Sbrk( size_t size );
|
||||
void *SWAP_Malloc( size_t size );
|
||||
void *SWAP_Calloc( size_t nelem, size_t size );
|
||||
void SWAP_Free( void *cp );
|
||||
void *SWAP_Realloc( void *cp, size_t size );
|
||||
size_t SWAP_MallocUsableSize( void * cp );
|
||||
Loading…
Reference in New Issue