mirror of
https://github.com/php/php-src.git
synced 2024-12-16 13:26:19 +08:00
2582 lines
74 KiB
C
2582 lines
74 KiB
C
/*
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+----------------------------------------------------------------------+
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| Zend Engine |
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+----------------------------------------------------------------------+
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| Copyright (c) 1998-2015 Zend Technologies Ltd. (http://www.zend.com) |
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+----------------------------------------------------------------------+
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| This source file is subject to version 2.00 of the Zend license, |
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| that is bundled with this package in the file LICENSE, and is |
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| available through the world-wide-web at the following url: |
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| http://www.zend.com/license/2_00.txt. |
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| If you did not receive a copy of the Zend license and are unable to |
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| obtain it through the world-wide-web, please send a note to |
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| license@zend.com so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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| Authors: Andi Gutmans <andi@zend.com> |
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| Zeev Suraski <zeev@zend.com> |
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| Dmitry Stogov <dmitry@zend.com> |
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+----------------------------------------------------------------------+
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*/
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/* $Id$ */
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/*
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* zend_alloc is designed to be a modern CPU cache friendly memory manager
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* for PHP. Most ideas are taken from jemalloc and tcmalloc implementations.
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*
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* All allocations are split into 3 categories:
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*
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* Huge - the size is greater than CHUNK size (~2M by default), allocation is
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* performed using mmap(). The result is aligned on 2M boundary.
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*
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* Large - a number of 4096K pages inside a CHUNK. Large blocks
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* are always aligned on page boundary.
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*
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* Small - less than 3/4 of page size. Small sizes are rounded up to nearest
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* greater predefined small size (there are 30 predefined sizes:
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* 8, 16, 24, 32, ... 3072). Small blocks are allocated from
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* RUNs. Each RUN is allocated as a single or few following pages.
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* Allocation inside RUNs implemented using linked list of free
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* elements. The result is aligned to 8 bytes.
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*
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* zend_alloc allocates memory from OS by CHUNKs, these CHUNKs and huge memory
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* blocks are always aligned to CHUNK boundary. So it's very easy to determine
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* the CHUNK owning the certain pointer. Regular CHUNKs reserve a single
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* page at start for special purpose. It contains bitset of free pages,
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* few bitset for available runs of predefined small sizes, map of pages that
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* keeps information about usage of each page in this CHUNK, etc.
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*
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* zend_alloc provides familiar emalloc/efree/erealloc API, but in addition it
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* provides specialized and optimized routines to allocate blocks of predefined
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* sizes (e.g. emalloc_2(), emallc_4(), ..., emalloc_large(), etc)
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* The library uses C preprocessor tricks that substitute calls to emalloc()
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* with more specialized routines when the requested size is known.
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*/
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#include "zend.h"
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#include "zend_alloc.h"
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#include "zend_globals.h"
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#include "zend_operators.h"
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#include "zend_multiply.h"
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#ifdef HAVE_SIGNAL_H
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# include <signal.h>
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#endif
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif
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#ifdef ZEND_WIN32
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# include <wincrypt.h>
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# include <process.h>
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#if HAVE_LIMITS_H
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#include <limits.h>
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#endif
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#include <fcntl.h>
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#include <errno.h>
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|
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#ifndef _WIN32
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# ifdef HAVE_MREMAP
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# ifndef _GNU_SOURCE
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# define _GNU_SOURCE
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# endif
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# ifndef __USE_GNU
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# define __USE_GNU
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# endif
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# endif
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# include <sys/mman.h>
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# ifndef MAP_ANON
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# ifdef MAP_ANONYMOUS
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# define MAP_ANON MAP_ANONYMOUS
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# endif
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# endif
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# ifndef MREMAP_MAYMOVE
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# define MREMAP_MAYMOVE 0
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# endif
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# ifndef MAP_FAILED
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# define MAP_FAILED ((void*)-1)
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# endif
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# ifndef MAP_POPULATE
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# define MAP_POPULATE 0
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# endif
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# if defined(_SC_PAGESIZE) || (_SC_PAGE_SIZE)
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# define REAL_PAGE_SIZE _real_page_size
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static size_t _real_page_size = ZEND_MM_PAGE_SIZE;
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# endif
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#endif
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#ifndef REAL_PAGE_SIZE
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# define REAL_PAGE_SIZE ZEND_MM_PAGE_SIZE
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#endif
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#ifndef ZEND_MM_STAT
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# define ZEND_MM_STAT 1 /* track current and peak memory usage */
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#endif
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#ifndef ZEND_MM_LIMIT
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# define ZEND_MM_LIMIT 1 /* support for user-defined memory limit */
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#endif
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#ifndef ZEND_MM_CUSTOM
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# define ZEND_MM_CUSTOM 1 /* support for custom memory allocator */
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/* USE_ZEND_ALLOC=0 may switch to system malloc() */
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#endif
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#ifndef ZEND_MM_STORAGE
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# define ZEND_MM_STORAGE 1 /* support for custom memory storage */
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#endif
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#ifndef ZEND_MM_ERROR
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# define ZEND_MM_ERROR 1 /* report system errors */
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#endif
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#ifndef ZEND_MM_CHECK
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# define ZEND_MM_CHECK(condition, message) do { \
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if (UNEXPECTED(!(condition))) { \
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zend_mm_panic(message); \
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} \
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} while (0)
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#endif
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typedef uint32_t zend_mm_page_info; /* 4-byte integer */
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typedef zend_ulong zend_mm_bitset; /* 4-byte or 8-byte integer */
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#define ZEND_MM_ALIGNED_OFFSET(size, alignment) \
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(((size_t)(size)) & ((alignment) - 1))
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#define ZEND_MM_ALIGNED_BASE(size, alignment) \
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(((size_t)(size)) & ~((alignment) - 1))
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#define ZEND_MM_ALIGNED_SIZE_EX(size, alignment) \
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(((size_t)(size) + ((alignment) - 1)) & ~((alignment) - 1))
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#define ZEND_MM_SIZE_TO_NUM(size, alignment) \
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(((size_t)(size) + ((alignment) - 1)) / (alignment))
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#define ZEND_MM_BITSET_LEN (sizeof(zend_mm_bitset) * 8) /* 32 or 64 */
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#define ZEND_MM_PAGE_MAP_LEN (ZEND_MM_PAGES / ZEND_MM_BITSET_LEN) /* 16 or 8 */
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typedef zend_mm_bitset zend_mm_page_map[ZEND_MM_PAGE_MAP_LEN]; /* 64B */
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#define ZEND_MM_IS_FRUN 0x00000000
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#define ZEND_MM_IS_LRUN 0x40000000
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#define ZEND_MM_IS_SRUN 0x80000000
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#define ZEND_MM_LRUN_PAGES_MASK 0x000003ff
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#define ZEND_MM_LRUN_PAGES_OFFSET 0
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#define ZEND_MM_SRUN_BIN_NUM_MASK 0x0000001f
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#define ZEND_MM_SRUN_BIN_NUM_OFFSET 0
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#define ZEND_MM_LRUN_PAGES(info) (((info) & ZEND_MM_LRUN_PAGES_MASK) >> ZEND_MM_LRUN_PAGES_OFFSET)
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#define ZEND_MM_SRUN_BIN_NUM(info) (((info) & ZEND_MM_SRUN_BIN_NUM_MASK) >> ZEND_MM_SRUN_BIN_NUM_OFFSET)
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#define ZEND_MM_FRUN() ZEND_MM_IS_FRUN
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#define ZEND_MM_LRUN(count) (ZEND_MM_IS_LRUN | ((count) << ZEND_MM_LRUN_PAGES_OFFSET))
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#define ZEND_MM_SRUN(bin_num) (ZEND_MM_IS_SRUN | ((bin_num) << ZEND_MM_SRUN_BIN_NUM_OFFSET))
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#define ZEND_MM_BINS 30
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typedef struct _zend_mm_page zend_mm_page;
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typedef struct _zend_mm_bin zend_mm_bin;
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typedef struct _zend_mm_free_slot zend_mm_free_slot;
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typedef struct _zend_mm_chunk zend_mm_chunk;
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typedef struct _zend_mm_huge_list zend_mm_huge_list;
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#ifdef _WIN64
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# define PTR_FMT "0x%0.16I64x"
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#elif SIZEOF_LONG == 8
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# define PTR_FMT "0x%0.16lx"
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#else
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# define PTR_FMT "0x%0.8lx"
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#endif
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/*
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* Memory is retrived from OS by chunks of fixed size 2MB.
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* Inside chunk it's managed by pages of fixed size 4096B.
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* So each chunk consists from 512 pages.
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* The first page of each chunk is reseved for chunk header.
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* It contains service information about all pages.
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*
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* free_pages - current number of free pages in this chunk
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*
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* free_tail - number of continuous free pages at the end of chunk
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*
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* free_map - bitset (a bit for each page). The bit is set if the corresponding
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* page is allocated. Allocator for "lage sizes" may easily find a
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* free page (or a continuous number of pages) searching for zero
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* bits.
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*
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* map - contains service information for each page. (32-bits for each
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* page).
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* usage:
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* (2 bits)
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* FRUN - free page,
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* LRUN - first page of "large" allocation
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* SRUN - first page of a bin used for "small" allocation
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*
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* lrun_pages:
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* (10 bits) number of allocated pages
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*
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* srun_bin_num:
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* (5 bits) bin number (e.g. 0 for sizes 0-2, 1 for 3-4,
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* 2 for 5-8, 3 for 9-16 etc) see zend_alloc_sizes.h
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*/
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struct _zend_mm_heap {
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#if ZEND_MM_CUSTOM
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int use_custom_heap;
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#endif
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#if ZEND_MM_STORAGE
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zend_mm_storage *storage;
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#endif
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#if ZEND_MM_STAT
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size_t size; /* current memory usage */
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size_t peak; /* peak memory usage */
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#endif
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zend_mm_free_slot *free_slot[ZEND_MM_BINS]; /* free lists for small sizes */
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#if ZEND_MM_STAT || ZEND_MM_LIMIT
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size_t real_size; /* current size of allocated pages */
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#endif
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#if ZEND_MM_STAT
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size_t real_peak; /* peak size of allocated pages */
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#endif
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#if ZEND_MM_LIMIT
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size_t limit; /* memory limit */
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int overflow; /* memory overflow flag */
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#endif
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zend_mm_huge_list *huge_list; /* list of huge allocated blocks */
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zend_mm_chunk *main_chunk;
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zend_mm_chunk *cached_chunks; /* list of unused chunks */
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int chunks_count; /* number of alocated chunks */
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int peak_chunks_count; /* peak number of allocated chunks for current request */
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int cached_chunks_count; /* number of cached chunks */
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double avg_chunks_count; /* average number of chunks allocated per request */
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#if ZEND_MM_CUSTOM
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void *(*_malloc)(size_t);
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void (*_free)(void*);
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void *(*_realloc)(void*, size_t);
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#endif
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};
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struct _zend_mm_chunk {
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zend_mm_heap *heap;
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zend_mm_chunk *next;
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zend_mm_chunk *prev;
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int free_pages; /* number of free pages */
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int free_tail; /* number of free pages at the end of chunk */
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int num;
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char reserve[64 - (sizeof(void*) * 3 + sizeof(int) * 3)];
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zend_mm_heap heap_slot; /* used only in main chunk */
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zend_mm_page_map free_map; /* 512 bits or 64 bytes */
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zend_mm_page_info map[ZEND_MM_PAGES]; /* 2 KB = 512 * 4 */
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};
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struct _zend_mm_page {
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char bytes[ZEND_MM_PAGE_SIZE];
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};
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/*
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* bin - is one or few continuous pages (up to 8) used for allocation of
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* a particular "small size".
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*/
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struct _zend_mm_bin {
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char bytes[ZEND_MM_PAGE_SIZE * 8];
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};
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struct _zend_mm_free_slot {
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zend_mm_free_slot *next_free_slot;
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};
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struct _zend_mm_huge_list {
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void *ptr;
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size_t size;
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zend_mm_huge_list *next;
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#if ZEND_DEBUG
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zend_mm_debug_info dbg;
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#endif
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};
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|
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#define ZEND_MM_PAGE_ADDR(chunk, page_num) \
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((void*)(((zend_mm_page*)(chunk)) + (page_num)))
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#define _BIN_DATA_SIZE(num, size, elements, pages, x, y) size,
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static const unsigned int bin_data_size[] = {
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ZEND_MM_BINS_INFO(_BIN_DATA_SIZE, x, y)
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};
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|
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#define _BIN_DATA_ELEMENTS(num, size, elements, pages, x, y) elements,
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static const int bin_elements[] = {
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ZEND_MM_BINS_INFO(_BIN_DATA_ELEMENTS, x, y)
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};
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|
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#define _BIN_DATA_PAGES(num, size, elements, pages, x, y) pages,
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static const int bin_pages[] = {
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ZEND_MM_BINS_INFO(_BIN_DATA_PAGES, x, y)
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};
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|
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#if ZEND_DEBUG
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void zend_debug_alloc_output(char *format, ...)
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{
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char output_buf[256];
|
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va_list args;
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va_start(args, format);
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vsprintf(output_buf, format, args);
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va_end(args);
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#ifdef ZEND_WIN32
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OutputDebugString(output_buf);
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#else
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fprintf(stderr, "%s", output_buf);
|
|
#endif
|
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}
|
|
#endif
|
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|
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static ZEND_NORETURN void zend_mm_panic(const char *message)
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{
|
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fprintf(stderr, "%s\n", message);
|
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/* See http://support.microsoft.com/kb/190351 */
|
|
#ifdef PHP_WIN32
|
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fflush(stderr);
|
|
#endif
|
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#if ZEND_DEBUG && defined(HAVE_KILL) && defined(HAVE_GETPID)
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kill(getpid(), SIGSEGV);
|
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#endif
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exit(1);
|
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}
|
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|
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static ZEND_NORETURN void zend_mm_safe_error(zend_mm_heap *heap,
|
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const char *format,
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size_t limit,
|
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#if ZEND_DEBUG
|
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const char *filename,
|
|
uint lineno,
|
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#endif
|
|
size_t size)
|
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{
|
|
|
|
heap->overflow = 1;
|
|
zend_try {
|
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zend_error_noreturn(E_ERROR,
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format,
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|
limit,
|
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#if ZEND_DEBUG
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|
filename,
|
|
lineno,
|
|
#endif
|
|
size);
|
|
} zend_catch {
|
|
} zend_end_try();
|
|
heap->overflow = 0;
|
|
zend_bailout();
|
|
exit(1);
|
|
}
|
|
|
|
#ifdef _WIN32
|
|
void
|
|
stderr_last_error(char *msg)
|
|
{
|
|
LPSTR buf = NULL;
|
|
DWORD err = GetLastError();
|
|
|
|
if (!FormatMessage(
|
|
FORMAT_MESSAGE_ALLOCATE_BUFFER |
|
|
FORMAT_MESSAGE_FROM_SYSTEM |
|
|
FORMAT_MESSAGE_IGNORE_INSERTS,
|
|
NULL,
|
|
err,
|
|
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
|
|
(LPSTR)&buf,
|
|
0, NULL)) {
|
|
fprintf(stderr, "\n%s: [0x%08lx]\n", msg, err);
|
|
}
|
|
else {
|
|
fprintf(stderr, "\n%s: [0x%08lx] %s\n", msg, err, buf);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/*****************/
|
|
/* OS Allocation */
|
|
/*****************/
|
|
|
|
static void *zend_mm_mmap_fixed(void *addr, size_t size)
|
|
{
|
|
#ifdef _WIN32
|
|
return VirtualAlloc(addr, size, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);
|
|
#else
|
|
/* MAP_FIXED leads to discarding of the old mapping, so it can't be used. */
|
|
void *ptr = mmap(addr, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON /*| MAP_POPULATE | MAP_HUGETLB*/, -1, 0);
|
|
|
|
if (ptr == MAP_FAILED) {
|
|
#if ZEND_MM_ERROR
|
|
fprintf(stderr, "\nmmap() failed: [%d] %s\n", errno, strerror(errno));
|
|
#endif
|
|
return NULL;
|
|
} else if (ptr != addr) {
|
|
if (munmap(ptr, size) != 0) {
|
|
#if ZEND_MM_ERROR
|
|
fprintf(stderr, "\nmunmap() failed: [%d] %s\n", errno, strerror(errno));
|
|
#endif
|
|
}
|
|
return NULL;
|
|
}
|
|
return ptr;
|
|
#endif
|
|
}
|
|
|
|
static void *zend_mm_mmap(size_t size)
|
|
{
|
|
#ifdef _WIN32
|
|
void *ptr = VirtualAlloc(NULL, size, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);
|
|
|
|
if (ptr == NULL) {
|
|
#if ZEND_MM_ERROR
|
|
stderr_last_error("VirtualAlloc() failed");
|
|
#endif
|
|
return NULL;
|
|
}
|
|
return ptr;
|
|
#else
|
|
void *ptr = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON /*| MAP_POPULATE | MAP_HUGETLB*/, -1, 0);
|
|
|
|
if (ptr == MAP_FAILED) {
|
|
#if ZEND_MM_ERROR
|
|
fprintf(stderr, "\nmmap() failed: [%d] %s\n", errno, strerror(errno));
|
|
#endif
|
|
return NULL;
|
|
}
|
|
return ptr;
|
|
#endif
|
|
}
|
|
|
|
static void zend_mm_munmap(void *addr, size_t size)
|
|
{
|
|
#ifdef _WIN32
|
|
if (VirtualFree(addr, 0, MEM_RELEASE) == 0) {
|
|
#if ZEND_MM_ERROR
|
|
stderr_last_error("VirtualFree() failed");
|
|
#endif
|
|
}
|
|
#else
|
|
if (munmap(addr, size) != 0) {
|
|
#if ZEND_MM_ERROR
|
|
fprintf(stderr, "\nmunmap() failed: [%d] %s\n", errno, strerror(errno));
|
|
#endif
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/***********/
|
|
/* Bitmask */
|
|
/***********/
|
|
|
|
/* number of trailing set (1) bits */
|
|
static zend_always_inline int zend_mm_bitset_nts(zend_mm_bitset bitset)
|
|
{
|
|
#if (defined(__GNUC__) || __has_builtin(__builtin_ctzl)) && SIZEOF_ZEND_LONG == SIZEOF_LONG
|
|
return __builtin_ctzl(~bitset);
|
|
#elif defined(__GNUC__) || __has_builtin(__builtin_ctzll)
|
|
return __builtin_ctzll(~bitset);
|
|
#elif defined(_WIN32)
|
|
unsigned long index;
|
|
|
|
#if defined(_WIN64)
|
|
if (!BitScanForward64(&index, ~bitset)) {
|
|
#else
|
|
if (!BitScanForward(&index, ~bitset)) {
|
|
#endif
|
|
/* undefined behavior */
|
|
return 32;
|
|
}
|
|
|
|
return (int)index;
|
|
#else
|
|
int n;
|
|
|
|
if (bitset == (zend_mm_bitset)-1) return ZEND_MM_BITSET_LEN;
|
|
|
|
n = 0;
|
|
#if SIZEOF_ZEND_LONG == 8
|
|
if (sizeof(zend_mm_bitset) == 8) {
|
|
if ((bitset & 0xffffffff) == 0xffffffff) {n += 32; bitset = bitset >> Z_UL(32);}
|
|
}
|
|
#endif
|
|
if ((bitset & 0x0000ffff) == 0x0000ffff) {n += 16; bitset = bitset >> 16;}
|
|
if ((bitset & 0x000000ff) == 0x000000ff) {n += 8; bitset = bitset >> 8;}
|
|
if ((bitset & 0x0000000f) == 0x0000000f) {n += 4; bitset = bitset >> 4;}
|
|
if ((bitset & 0x00000003) == 0x00000003) {n += 2; bitset = bitset >> 2;}
|
|
return n + (bitset & 1);
|
|
#endif
|
|
}
|
|
|
|
/* number of trailing zero bits (0x01 -> 1; 0x40 -> 6; 0x00 -> LEN) */
|
|
static zend_always_inline int zend_mm_bitset_ntz(zend_mm_bitset bitset)
|
|
{
|
|
#if (defined(__GNUC__) || __has_builtin(__builtin_ctzl)) && SIZEOF_ZEND_LONG == SIZEOF_LONG
|
|
return __builtin_ctzl(bitset);
|
|
#elif defined(__GNUC__) || __has_builtin(__builtin_ctzll)
|
|
return __builtin_ctzll(bitset);
|
|
#elif defined(_WIN32)
|
|
unsigned long index;
|
|
|
|
#if defined(_WIN64)
|
|
if (!BitScanForward64(&index, bitset)) {
|
|
#else
|
|
if (!BitScanForward(&index, bitset)) {
|
|
#endif
|
|
/* undefined behavior */
|
|
return 32;
|
|
}
|
|
|
|
return (int)index;
|
|
#else
|
|
int n;
|
|
|
|
if (bitset == (zend_mm_bitset)0) return ZEND_MM_BITSET_LEN;
|
|
|
|
n = 1;
|
|
#if SIZEOF_ZEND_LONG == 8
|
|
if (sizeof(zend_mm_bitset) == 8) {
|
|
if ((bitset & 0xffffffff) == 0) {n += 32; bitset = bitset >> Z_UL(32);}
|
|
}
|
|
#endif
|
|
if ((bitset & 0x0000ffff) == 0) {n += 16; bitset = bitset >> 16;}
|
|
if ((bitset & 0x000000ff) == 0) {n += 8; bitset = bitset >> 8;}
|
|
if ((bitset & 0x0000000f) == 0) {n += 4; bitset = bitset >> 4;}
|
|
if ((bitset & 0x00000003) == 0) {n += 2; bitset = bitset >> 2;}
|
|
return n - (bitset & 1);
|
|
#endif
|
|
}
|
|
|
|
static zend_always_inline int zend_mm_bitset_find_zero(zend_mm_bitset *bitset, int size)
|
|
{
|
|
int i = 0;
|
|
|
|
do {
|
|
zend_mm_bitset tmp = bitset[i];
|
|
if (tmp != (zend_mm_bitset)-1) {
|
|
return i * ZEND_MM_BITSET_LEN + zend_mm_bitset_nts(tmp);
|
|
}
|
|
i++;
|
|
} while (i < size);
|
|
return -1;
|
|
}
|
|
|
|
static zend_always_inline int zend_mm_bitset_find_one(zend_mm_bitset *bitset, int size)
|
|
{
|
|
int i = 0;
|
|
|
|
do {
|
|
zend_mm_bitset tmp = bitset[i];
|
|
if (tmp != 0) {
|
|
return i * ZEND_MM_BITSET_LEN + zend_mm_bitset_ntz(tmp);
|
|
}
|
|
i++;
|
|
} while (i < size);
|
|
return -1;
|
|
}
|
|
|
|
static zend_always_inline int zend_mm_bitset_find_zero_and_set(zend_mm_bitset *bitset, int size)
|
|
{
|
|
int i = 0;
|
|
|
|
do {
|
|
zend_mm_bitset tmp = bitset[i];
|
|
if (tmp != (zend_mm_bitset)-1) {
|
|
int n = zend_mm_bitset_nts(tmp);
|
|
bitset[i] |= Z_UL(1) << n;
|
|
return i * ZEND_MM_BITSET_LEN + n;
|
|
}
|
|
i++;
|
|
} while (i < size);
|
|
return -1;
|
|
}
|
|
|
|
static zend_always_inline int zend_mm_bitset_is_set(zend_mm_bitset *bitset, int bit)
|
|
{
|
|
return (bitset[bit / ZEND_MM_BITSET_LEN] & (Z_L(1) << (bit & (ZEND_MM_BITSET_LEN-1)))) != 0;
|
|
}
|
|
|
|
static zend_always_inline void zend_mm_bitset_set_bit(zend_mm_bitset *bitset, int bit)
|
|
{
|
|
bitset[bit / ZEND_MM_BITSET_LEN] |= (Z_L(1) << (bit & (ZEND_MM_BITSET_LEN-1)));
|
|
}
|
|
|
|
static zend_always_inline void zend_mm_bitset_reset_bit(zend_mm_bitset *bitset, int bit)
|
|
{
|
|
bitset[bit / ZEND_MM_BITSET_LEN] &= ~(Z_L(1) << (bit & (ZEND_MM_BITSET_LEN-1)));
|
|
}
|
|
|
|
static zend_always_inline void zend_mm_bitset_set_range(zend_mm_bitset *bitset, int start, int len)
|
|
{
|
|
if (len == 1) {
|
|
zend_mm_bitset_set_bit(bitset, start);
|
|
} else {
|
|
int pos = start / ZEND_MM_BITSET_LEN;
|
|
int end = (start + len - 1) / ZEND_MM_BITSET_LEN;
|
|
int bit = start & (ZEND_MM_BITSET_LEN - 1);
|
|
zend_mm_bitset tmp;
|
|
|
|
if (pos != end) {
|
|
/* set bits from "bit" to ZEND_MM_BITSET_LEN-1 */
|
|
tmp = (zend_mm_bitset)-1 << bit;
|
|
bitset[pos++] |= tmp;
|
|
while (pos != end) {
|
|
/* set all bits */
|
|
bitset[pos++] = (zend_mm_bitset)-1;
|
|
}
|
|
end = (start + len - 1) & (ZEND_MM_BITSET_LEN - 1);
|
|
/* set bits from "0" to "end" */
|
|
tmp = (zend_mm_bitset)-1 >> ((ZEND_MM_BITSET_LEN - 1) - end);
|
|
bitset[pos] |= tmp;
|
|
} else {
|
|
end = (start + len - 1) & (ZEND_MM_BITSET_LEN - 1);
|
|
/* set bits from "bit" to "end" */
|
|
tmp = (zend_mm_bitset)-1 << bit;
|
|
tmp &= (zend_mm_bitset)-1 >> ((ZEND_MM_BITSET_LEN - 1) - end);
|
|
bitset[pos] |= tmp;
|
|
}
|
|
}
|
|
}
|
|
|
|
static zend_always_inline void zend_mm_bitset_reset_range(zend_mm_bitset *bitset, int start, int len)
|
|
{
|
|
if (len == 1) {
|
|
zend_mm_bitset_reset_bit(bitset, start);
|
|
} else {
|
|
int pos = start / ZEND_MM_BITSET_LEN;
|
|
int end = (start + len - 1) / ZEND_MM_BITSET_LEN;
|
|
int bit = start & (ZEND_MM_BITSET_LEN - 1);
|
|
zend_mm_bitset tmp;
|
|
|
|
if (pos != end) {
|
|
/* reset bits from "bit" to ZEND_MM_BITSET_LEN-1 */
|
|
tmp = ~((Z_L(1) << bit) - 1);
|
|
bitset[pos++] &= ~tmp;
|
|
while (pos != end) {
|
|
/* set all bits */
|
|
bitset[pos++] = 0;
|
|
}
|
|
end = (start + len - 1) & (ZEND_MM_BITSET_LEN - 1);
|
|
/* reset bits from "0" to "end" */
|
|
tmp = (zend_mm_bitset)-1 >> ((ZEND_MM_BITSET_LEN - 1) - end);
|
|
bitset[pos] &= ~tmp;
|
|
} else {
|
|
end = (start + len - 1) & (ZEND_MM_BITSET_LEN - 1);
|
|
/* reset bits from "bit" to "end" */
|
|
tmp = (zend_mm_bitset)-1 << bit;
|
|
tmp &= (zend_mm_bitset)-1 >> ((ZEND_MM_BITSET_LEN - 1) - end);
|
|
bitset[pos] &= ~tmp;
|
|
}
|
|
}
|
|
}
|
|
|
|
static zend_always_inline int zend_mm_bitset_is_free_range(zend_mm_bitset *bitset, int start, int len)
|
|
{
|
|
if (len == 1) {
|
|
return !zend_mm_bitset_is_set(bitset, start);
|
|
} else {
|
|
int pos = start / ZEND_MM_BITSET_LEN;
|
|
int end = (start + len - 1) / ZEND_MM_BITSET_LEN;
|
|
int bit = start & (ZEND_MM_BITSET_LEN - 1);
|
|
zend_mm_bitset tmp;
|
|
|
|
if (pos != end) {
|
|
/* set bits from "bit" to ZEND_MM_BITSET_LEN-1 */
|
|
tmp = (zend_mm_bitset)-1 << bit;
|
|
if ((bitset[pos++] & tmp) != 0) {
|
|
return 0;
|
|
}
|
|
while (pos != end) {
|
|
/* set all bits */
|
|
if (bitset[pos++] != 0) {
|
|
return 0;
|
|
}
|
|
}
|
|
end = (start + len - 1) & (ZEND_MM_BITSET_LEN - 1);
|
|
/* set bits from "0" to "end" */
|
|
tmp = (zend_mm_bitset)-1 >> ((ZEND_MM_BITSET_LEN - 1) - end);
|
|
return (bitset[pos] & tmp) == 0;
|
|
} else {
|
|
end = (start + len - 1) & (ZEND_MM_BITSET_LEN - 1);
|
|
/* set bits from "bit" to "end" */
|
|
tmp = (zend_mm_bitset)-1 << bit;
|
|
tmp &= (zend_mm_bitset)-1 >> ((ZEND_MM_BITSET_LEN - 1) - end);
|
|
return (bitset[pos] & tmp) == 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**********/
|
|
/* Chunks */
|
|
/**********/
|
|
|
|
static void *zend_mm_chunk_alloc_int(size_t size, size_t alignment)
|
|
{
|
|
void *ptr = zend_mm_mmap(size);
|
|
|
|
if (ptr == NULL) {
|
|
return NULL;
|
|
} else if (ZEND_MM_ALIGNED_OFFSET(ptr, alignment) == 0) {
|
|
#ifdef MADV_HUGEPAGE
|
|
madvise(ptr, size, MADV_HUGEPAGE);
|
|
#endif
|
|
return ptr;
|
|
} else {
|
|
size_t offset;
|
|
|
|
/* chunk has to be aligned */
|
|
zend_mm_munmap(ptr, size);
|
|
ptr = zend_mm_mmap(size + alignment - REAL_PAGE_SIZE);
|
|
#ifdef _WIN32
|
|
offset = ZEND_MM_ALIGNED_OFFSET(ptr, alignment);
|
|
zend_mm_munmap(ptr, size + alignment - REAL_PAGE_SIZE);
|
|
ptr = zend_mm_mmap_fixed((void*)((char*)ptr + (alignment - offset)), size);
|
|
offset = ZEND_MM_ALIGNED_OFFSET(ptr, alignment);
|
|
if (offset != 0) {
|
|
zend_mm_munmap(ptr, size);
|
|
return NULL;
|
|
}
|
|
return ptr;
|
|
#else
|
|
offset = ZEND_MM_ALIGNED_OFFSET(ptr, alignment);
|
|
if (offset != 0) {
|
|
offset = alignment - offset;
|
|
zend_mm_munmap(ptr, offset);
|
|
ptr = (char*)ptr + offset;
|
|
alignment -= offset;
|
|
}
|
|
if (alignment > REAL_PAGE_SIZE) {
|
|
zend_mm_munmap((char*)ptr + size, alignment - REAL_PAGE_SIZE);
|
|
}
|
|
# ifdef MADV_HUGEPAGE
|
|
madvise(ptr, size, MADV_HUGEPAGE);
|
|
# endif
|
|
#endif
|
|
return ptr;
|
|
}
|
|
}
|
|
|
|
static void *zend_mm_chunk_alloc(zend_mm_heap *heap, size_t size, size_t alignment)
|
|
{
|
|
#if ZEND_MM_STORAGE
|
|
if (UNEXPECTED(heap->storage)) {
|
|
void *ptr = heap->storage->handlers.chunk_alloc(heap->storage, size, alignment);
|
|
ZEND_ASSERT(((zend_uintptr_t)((char*)ptr + (alignment-1)) & (alignment-1)) == (zend_uintptr_t)ptr);
|
|
return ptr;
|
|
}
|
|
#endif
|
|
return zend_mm_chunk_alloc_int(size, alignment);
|
|
}
|
|
|
|
static void zend_mm_chunk_free(zend_mm_heap *heap, void *addr, size_t size)
|
|
{
|
|
#if ZEND_MM_STORAGE
|
|
if (UNEXPECTED(heap->storage)) {
|
|
heap->storage->handlers.chunk_free(heap->storage, addr, size);
|
|
return;
|
|
}
|
|
#endif
|
|
zend_mm_munmap(addr, size);
|
|
}
|
|
|
|
static int zend_mm_chunk_truncate(zend_mm_heap *heap, void *addr, size_t old_size, size_t new_size)
|
|
{
|
|
#if ZEND_MM_STORAGE
|
|
if (UNEXPECTED(heap->storage)) {
|
|
if (heap->storage->handlers.chunk_truncate) {
|
|
return heap->storage->handlers.chunk_truncate(heap->storage, addr, old_size, new_size);
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
#endif
|
|
#ifndef _WIN32
|
|
zend_mm_munmap((char*)addr + new_size, old_size - new_size);
|
|
return 1;
|
|
#else
|
|
return 0;
|
|
#endif
|
|
}
|
|
|
|
static int zend_mm_chunk_extend(zend_mm_heap *heap, void *addr, size_t old_size, size_t new_size)
|
|
{
|
|
#if ZEND_MM_STORAGE
|
|
if (UNEXPECTED(heap->storage)) {
|
|
if (heap->storage->handlers.chunk_extend) {
|
|
return heap->storage->handlers.chunk_extend(heap->storage, addr, old_size, new_size);
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
#endif
|
|
#ifndef _WIN32
|
|
return (zend_mm_mmap_fixed((char*)addr + old_size, new_size - old_size) != NULL);
|
|
#else
|
|
return 0;
|
|
#endif
|
|
}
|
|
|
|
static zend_always_inline void zend_mm_chunk_init(zend_mm_heap *heap, zend_mm_chunk *chunk)
|
|
{
|
|
chunk->heap = heap;
|
|
chunk->next = heap->main_chunk;
|
|
chunk->prev = heap->main_chunk->prev;
|
|
chunk->prev->next = chunk;
|
|
chunk->next->prev = chunk;
|
|
/* mark first pages as allocated */
|
|
chunk->free_pages = ZEND_MM_PAGES - ZEND_MM_FIRST_PAGE;
|
|
chunk->free_tail = ZEND_MM_FIRST_PAGE;
|
|
/* the younger chunks have bigger number */
|
|
chunk->num = chunk->prev->num + 1;
|
|
/* mark first pages as allocated */
|
|
chunk->free_map[0] = (1L << ZEND_MM_FIRST_PAGE) - 1;
|
|
chunk->map[0] = ZEND_MM_LRUN(ZEND_MM_FIRST_PAGE);
|
|
}
|
|
|
|
/***********************/
|
|
/* Huge Runs (forward) */
|
|
/***********************/
|
|
|
|
static size_t zend_mm_get_huge_block_size(zend_mm_heap *heap, void *ptr ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC);
|
|
static void *zend_mm_alloc_huge(zend_mm_heap *heap, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC);
|
|
static void zend_mm_free_huge(zend_mm_heap *heap, void *ptr ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC);
|
|
|
|
#if ZEND_DEBUG
|
|
static void zend_mm_change_huge_block_size(zend_mm_heap *heap, void *ptr, size_t size, size_t dbg_size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC);
|
|
#else
|
|
static void zend_mm_change_huge_block_size(zend_mm_heap *heap, void *ptr, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC);
|
|
#endif
|
|
|
|
/**************/
|
|
/* Large Runs */
|
|
/**************/
|
|
|
|
#if ZEND_DEBUG
|
|
static void *zend_mm_alloc_pages(zend_mm_heap *heap, int pages_count, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
#else
|
|
static void *zend_mm_alloc_pages(zend_mm_heap *heap, int pages_count ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
#endif
|
|
{
|
|
zend_mm_chunk *chunk = heap->main_chunk;
|
|
int page_num, len;
|
|
|
|
while (1) {
|
|
if (UNEXPECTED(chunk->free_pages < pages_count)) {
|
|
goto not_found;
|
|
#if 0
|
|
} else if (UNEXPECTED(chunk->free_pages + chunk->free_tail == ZEND_MM_PAGES)) {
|
|
if (UNEXPECTED(ZEND_MM_PAGES - chunk->free_tail < pages_count)) {
|
|
goto not_found;
|
|
} else {
|
|
page_num = chunk->free_tail;
|
|
goto found;
|
|
}
|
|
} else if (0) {
|
|
/* First-Fit Search */
|
|
int free_tail = chunk->free_tail;
|
|
zend_mm_bitset *bitset = chunk->free_map;
|
|
zend_mm_bitset tmp = *(bitset++);
|
|
int i = 0;
|
|
|
|
while (1) {
|
|
/* skip allocated blocks */
|
|
while (tmp == (zend_mm_bitset)-1) {
|
|
i += ZEND_MM_BITSET_LEN;
|
|
if (i == ZEND_MM_PAGES) {
|
|
goto not_found;
|
|
}
|
|
tmp = *(bitset++);
|
|
}
|
|
/* find first 0 bit */
|
|
page_num = i + zend_mm_bitset_nts(tmp);
|
|
/* reset bits from 0 to "bit" */
|
|
tmp &= tmp + 1;
|
|
/* skip free blocks */
|
|
while (tmp == 0) {
|
|
i += ZEND_MM_BITSET_LEN;
|
|
len = i - page_num;
|
|
if (len >= pages_count) {
|
|
goto found;
|
|
} else if (i >= free_tail) {
|
|
goto not_found;
|
|
}
|
|
tmp = *(bitset++);
|
|
}
|
|
/* find first 1 bit */
|
|
len = (i + zend_mm_bitset_ntz(tmp)) - page_num;
|
|
if (len >= pages_count) {
|
|
goto found;
|
|
}
|
|
/* set bits from 0 to "bit" */
|
|
tmp |= tmp - 1;
|
|
}
|
|
#endif
|
|
} else {
|
|
/* Best-Fit Search */
|
|
int best = -1;
|
|
int best_len = ZEND_MM_PAGES;
|
|
int free_tail = chunk->free_tail;
|
|
zend_mm_bitset *bitset = chunk->free_map;
|
|
zend_mm_bitset tmp = *(bitset++);
|
|
int i = 0;
|
|
|
|
while (1) {
|
|
/* skip allocated blocks */
|
|
while (tmp == (zend_mm_bitset)-1) {
|
|
i += ZEND_MM_BITSET_LEN;
|
|
if (i == ZEND_MM_PAGES) {
|
|
if (best > 0) {
|
|
page_num = best;
|
|
goto found;
|
|
} else {
|
|
goto not_found;
|
|
}
|
|
}
|
|
tmp = *(bitset++);
|
|
}
|
|
/* find first 0 bit */
|
|
page_num = i + zend_mm_bitset_nts(tmp);
|
|
/* reset bits from 0 to "bit" */
|
|
tmp &= tmp + 1;
|
|
/* skip free blocks */
|
|
while (tmp == 0) {
|
|
i += ZEND_MM_BITSET_LEN;
|
|
if (i >= free_tail) {
|
|
len = ZEND_MM_PAGES - page_num;
|
|
if (len >= pages_count && len < best_len) {
|
|
chunk->free_tail = page_num + pages_count;
|
|
goto found;
|
|
} else {
|
|
/* set accurate value */
|
|
chunk->free_tail = page_num;
|
|
if (best > 0) {
|
|
page_num = best;
|
|
goto found;
|
|
} else {
|
|
goto not_found;
|
|
}
|
|
}
|
|
}
|
|
tmp = *(bitset++);
|
|
}
|
|
/* find first 1 bit */
|
|
len = i + zend_mm_bitset_ntz(tmp) - page_num;
|
|
if (len >= pages_count) {
|
|
if (len == pages_count) {
|
|
goto found;
|
|
} else if (len < best_len) {
|
|
best_len = len;
|
|
best = page_num;
|
|
}
|
|
}
|
|
/* set bits from 0 to "bit" */
|
|
tmp |= tmp - 1;
|
|
}
|
|
}
|
|
|
|
not_found:
|
|
if (chunk->next == heap->main_chunk) {
|
|
if (heap->cached_chunks) {
|
|
heap->cached_chunks_count--;
|
|
chunk = heap->cached_chunks;
|
|
heap->cached_chunks = chunk->next;
|
|
} else {
|
|
#if ZEND_MM_LIMIT
|
|
if (heap->real_size + ZEND_MM_CHUNK_SIZE > heap->limit) {
|
|
if (heap->overflow == 0) {
|
|
#if ZEND_DEBUG
|
|
zend_mm_safe_error(heap, "Allowed memory size of %zu bytes exhausted at %s:%d (tried to allocate %zu bytes)", heap->limit, __zend_filename, __zend_lineno, size);
|
|
#else
|
|
zend_mm_safe_error(heap, "Allowed memory size of %zu bytes exhausted (tried to allocate %zu bytes)", heap->limit, ZEND_MM_PAGE_SIZE * pages_count);
|
|
#endif
|
|
return NULL;
|
|
}
|
|
}
|
|
#endif
|
|
chunk = (zend_mm_chunk*)zend_mm_chunk_alloc(heap, ZEND_MM_CHUNK_SIZE, ZEND_MM_CHUNK_SIZE);
|
|
if (UNEXPECTED(chunk == NULL)) {
|
|
/* insufficient memory */
|
|
#if !ZEND_MM_LIMIT
|
|
zend_mm_safe_error(heap, "Out of memory");
|
|
#elif ZEND_DEBUG
|
|
zend_mm_safe_error(heap, "Out of memory (allocated %zu) at %s:%d (tried to allocate %zu bytes)", heap->real_size, __zend_filename, __zend_lineno, size);
|
|
#else
|
|
zend_mm_safe_error(heap, "Out of memory (allocated %zu) (tried to allocate %zu bytes)", heap->real_size, ZEND_MM_PAGE_SIZE * pages_count);
|
|
#endif
|
|
return NULL;
|
|
}
|
|
#if ZEND_MM_STAT
|
|
do {
|
|
size_t size = heap->real_size + ZEND_MM_CHUNK_SIZE;
|
|
size_t peak = MAX(heap->real_peak, size);
|
|
heap->real_size = size;
|
|
heap->real_peak = peak;
|
|
} while (0);
|
|
#elif ZEND_MM_LIMIT
|
|
heap->real_size += ZEND_MM_CHUNK_SIZE;
|
|
|
|
#endif
|
|
}
|
|
heap->chunks_count++;
|
|
if (heap->chunks_count > heap->peak_chunks_count) {
|
|
heap->peak_chunks_count = heap->chunks_count;
|
|
}
|
|
zend_mm_chunk_init(heap, chunk);
|
|
page_num = ZEND_MM_FIRST_PAGE;
|
|
len = ZEND_MM_PAGES - ZEND_MM_FIRST_PAGE;
|
|
goto found;
|
|
} else {
|
|
chunk = chunk->next;
|
|
}
|
|
}
|
|
|
|
found:
|
|
/* mark run as allocated */
|
|
chunk->free_pages -= pages_count;
|
|
zend_mm_bitset_set_range(chunk->free_map, page_num, pages_count);
|
|
chunk->map[page_num] = ZEND_MM_LRUN(pages_count);
|
|
if (page_num == chunk->free_tail) {
|
|
chunk->free_tail = page_num + pages_count;
|
|
}
|
|
return ZEND_MM_PAGE_ADDR(chunk, page_num);
|
|
}
|
|
|
|
static zend_always_inline void *zend_mm_alloc_large(zend_mm_heap *heap, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
{
|
|
int pages_count = (int)ZEND_MM_SIZE_TO_NUM(size, ZEND_MM_PAGE_SIZE);
|
|
#if ZEND_DEBUG
|
|
void *ptr = zend_mm_alloc_pages(heap, pages_count, size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
#else
|
|
void *ptr = zend_mm_alloc_pages(heap, pages_count ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
#endif
|
|
#if ZEND_MM_STAT
|
|
do {
|
|
size_t size = heap->size + pages_count * ZEND_MM_PAGE_SIZE;
|
|
size_t peak = MAX(heap->peak, size);
|
|
heap->size = size;
|
|
heap->peak = peak;
|
|
} while (0);
|
|
#endif
|
|
return ptr;
|
|
}
|
|
|
|
static void zend_mm_free_pages(zend_mm_heap *heap, zend_mm_chunk *chunk, int page_num, int pages_count)
|
|
{
|
|
chunk->free_pages += pages_count;
|
|
zend_mm_bitset_reset_range(chunk->free_map, page_num, pages_count);
|
|
chunk->map[page_num] = 0;
|
|
if (chunk->free_tail == page_num + pages_count) {
|
|
/* this setting may be not accurate */
|
|
chunk->free_tail = page_num;
|
|
}
|
|
if (chunk->free_pages == ZEND_MM_PAGES - ZEND_MM_FIRST_PAGE) {
|
|
/* delete chunk */
|
|
chunk->next->prev = chunk->prev;
|
|
chunk->prev->next = chunk->next;
|
|
heap->chunks_count--;
|
|
if (heap->chunks_count + heap->cached_chunks_count < heap->avg_chunks_count + 0.1) {
|
|
/* delay deletion */
|
|
heap->cached_chunks_count++;
|
|
chunk->next = heap->cached_chunks;
|
|
heap->cached_chunks = chunk;
|
|
} else {
|
|
#if ZEND_MM_STAT || ZEND_MM_LIMIT
|
|
heap->real_size -= ZEND_MM_CHUNK_SIZE;
|
|
#endif
|
|
if (!heap->cached_chunks || chunk->num > heap->cached_chunks->num) {
|
|
zend_mm_chunk_free(heap, chunk, ZEND_MM_CHUNK_SIZE);
|
|
} else {
|
|
//TODO: select the best chunk to delete???
|
|
chunk->next = heap->cached_chunks->next;
|
|
zend_mm_chunk_free(heap, heap->cached_chunks, ZEND_MM_CHUNK_SIZE);
|
|
heap->cached_chunks = chunk;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static zend_always_inline void zend_mm_free_large(zend_mm_heap *heap, zend_mm_chunk *chunk, int page_num, int pages_count)
|
|
{
|
|
#if ZEND_MM_STAT
|
|
heap->size -= pages_count * ZEND_MM_PAGE_SIZE;
|
|
#endif
|
|
zend_mm_free_pages(heap, chunk, page_num, pages_count);
|
|
}
|
|
|
|
/**************/
|
|
/* Small Runs */
|
|
/**************/
|
|
|
|
/* higher set bit number (0->N/A, 1->1, 2->2, 4->3, 8->4, 127->7, 128->8 etc) */
|
|
static zend_always_inline int zend_mm_small_size_to_bit(int size)
|
|
{
|
|
#if defined(__GNUC__) || __has_builtin(__builtin_clz)
|
|
return (__builtin_clz(size) ^ 0x1f) + 1;
|
|
#elif defined(_WIN32)
|
|
unsigned long index;
|
|
|
|
if (!BitScanReverse(&index, (unsigned long)size)) {
|
|
/* undefined behavior */
|
|
return 64;
|
|
}
|
|
|
|
return (((31 - (int)index) ^ 0x1f) + 1);
|
|
#else
|
|
int n = 16;
|
|
if (size <= 0x00ff) {n -= 8; size = size << 8;}
|
|
if (size <= 0x0fff) {n -= 4; size = size << 4;}
|
|
if (size <= 0x3fff) {n -= 2; size = size << 2;}
|
|
if (size <= 0x7fff) {n -= 1;}
|
|
return n;
|
|
#endif
|
|
}
|
|
|
|
#ifndef MAX
|
|
# define MAX(a, b) (((a) > (b)) ? (a) : (b))
|
|
#endif
|
|
|
|
#ifndef MIN
|
|
# define MIN(a, b) (((a) < (b)) ? (a) : (b))
|
|
#endif
|
|
|
|
static zend_always_inline int zend_mm_small_size_to_bin(size_t size)
|
|
{
|
|
#if 0
|
|
int n;
|
|
/*0, 1, 2, 3, 4, 5, 6, 7, 8, 9 10, 11, 12*/
|
|
static const int f1[] = { 3, 3, 3, 3, 3, 3, 3, 4, 5, 6, 7, 8, 9};
|
|
static const int f2[] = { 0, 0, 0, 0, 0, 0, 0, 4, 8, 12, 16, 20, 24};
|
|
|
|
if (UNEXPECTED(size <= 2)) return 0;
|
|
n = zend_mm_small_size_to_bit(size - 1);
|
|
return ((size-1) >> f1[n]) + f2[n];
|
|
#else
|
|
int t1, t2, t3;
|
|
|
|
if (UNEXPECTED(size <= 8)) return 0;
|
|
t1 = (int)(size - 1);
|
|
t2 = zend_mm_small_size_to_bit(t1);
|
|
t3 = t2 - 6;
|
|
t3 = (t3 < 0) ? 0 : t3;
|
|
t2 = t3 + 3;
|
|
t1 = t1 >> t2;
|
|
t3 = t3 << 2;
|
|
return t1 + t3;
|
|
#endif
|
|
}
|
|
|
|
#define ZEND_MM_SMALL_SIZE_TO_BIN(size) zend_mm_small_size_to_bin(size)
|
|
|
|
static zend_never_inline void *zend_mm_alloc_small_slow(zend_mm_heap *heap, int bin_num ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
{
|
|
zend_mm_chunk *chunk;
|
|
int page_num;
|
|
zend_mm_bin *bin;
|
|
zend_mm_free_slot *p, *end;
|
|
|
|
#if ZEND_DEBUG
|
|
bin = (zend_mm_bin*)zend_mm_alloc_pages(heap, bin_pages[bin_num], bin_data_size[bin_num] ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
#else
|
|
bin = (zend_mm_bin*)zend_mm_alloc_pages(heap, bin_pages[bin_num] ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
#endif
|
|
if (UNEXPECTED(bin == NULL)) {
|
|
/* insufficient memory */
|
|
return NULL;
|
|
}
|
|
|
|
chunk = (zend_mm_chunk*)ZEND_MM_ALIGNED_BASE(bin, ZEND_MM_CHUNK_SIZE);
|
|
page_num = ZEND_MM_ALIGNED_OFFSET(bin, ZEND_MM_CHUNK_SIZE) / ZEND_MM_PAGE_SIZE;
|
|
chunk->map[page_num] = ZEND_MM_SRUN(bin_num);
|
|
if (bin_pages[bin_num] > 1) {
|
|
int i = 1;
|
|
do {
|
|
chunk->map[page_num+i] = ZEND_MM_SRUN(bin_num);
|
|
i++;
|
|
} while (i < bin_pages[bin_num]);
|
|
}
|
|
|
|
/* create a linked list of elements from 1 to last */
|
|
end = (zend_mm_free_slot*)((char*)bin + (bin_data_size[bin_num] * (bin_elements[bin_num] - 1)));
|
|
heap->free_slot[bin_num] = p = (zend_mm_free_slot*)((char*)bin + bin_data_size[bin_num]);
|
|
do {
|
|
p->next_free_slot = (zend_mm_free_slot*)((char*)p + bin_data_size[bin_num]);;
|
|
#if ZEND_DEBUG
|
|
do {
|
|
zend_mm_debug_info *dbg = (zend_mm_debug_info*)((char*)p + bin_data_size[bin_num] - ZEND_MM_ALIGNED_SIZE(sizeof(zend_mm_debug_info)));
|
|
dbg->size = 0;
|
|
} while (0);
|
|
#endif
|
|
p = (zend_mm_free_slot*)((char*)p + bin_data_size[bin_num]);
|
|
} while (p != end);
|
|
|
|
/* terminate list using NULL */
|
|
p->next_free_slot = NULL;
|
|
#if ZEND_DEBUG
|
|
do {
|
|
zend_mm_debug_info *dbg = (zend_mm_debug_info*)((char*)p + bin_data_size[bin_num] - ZEND_MM_ALIGNED_SIZE(sizeof(zend_mm_debug_info)));
|
|
dbg->size = 0;
|
|
} while (0);
|
|
#endif
|
|
|
|
/* return first element */
|
|
return (char*)bin;
|
|
}
|
|
|
|
static zend_always_inline void *zend_mm_alloc_small(zend_mm_heap *heap, size_t size, int bin_num ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
{
|
|
#if ZEND_MM_STAT
|
|
do {
|
|
size_t size = heap->size + bin_data_size[bin_num];
|
|
size_t peak = MAX(heap->peak, size);
|
|
heap->size = size;
|
|
heap->peak = peak;
|
|
} while (0);
|
|
#endif
|
|
|
|
if (EXPECTED(heap->free_slot[bin_num] != NULL)) {
|
|
zend_mm_free_slot *p = heap->free_slot[bin_num];
|
|
heap->free_slot[bin_num] = p->next_free_slot;
|
|
return (void*)p;
|
|
} else {
|
|
return zend_mm_alloc_small_slow(heap, bin_num ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
}
|
|
}
|
|
|
|
static zend_always_inline void zend_mm_free_small(zend_mm_heap *heap, void *ptr, int bin_num)
|
|
{
|
|
zend_mm_free_slot *p;
|
|
|
|
#if ZEND_MM_STAT
|
|
heap->size -= bin_data_size[bin_num];
|
|
#endif
|
|
|
|
#if ZEND_DEBUG
|
|
do {
|
|
zend_mm_debug_info *dbg = (zend_mm_debug_info*)((char*)ptr + bin_data_size[bin_num] - ZEND_MM_ALIGNED_SIZE(sizeof(zend_mm_debug_info)));
|
|
dbg->size = 0;
|
|
} while (0);
|
|
#endif
|
|
|
|
p = (zend_mm_free_slot*)ptr;
|
|
p->next_free_slot = heap->free_slot[bin_num];
|
|
heap->free_slot[bin_num] = p;
|
|
}
|
|
|
|
/********/
|
|
/* Heap */
|
|
/********/
|
|
|
|
#if ZEND_DEBUG
|
|
static zend_always_inline zend_mm_debug_info *zend_mm_get_debug_info(zend_mm_heap *heap, void *ptr)
|
|
{
|
|
size_t page_offset = ZEND_MM_ALIGNED_OFFSET(ptr, ZEND_MM_CHUNK_SIZE);
|
|
zend_mm_chunk *chunk;
|
|
int page_num;
|
|
zend_mm_page_info info;
|
|
|
|
ZEND_MM_CHECK(page_offset != 0, "zend_mm_heap corrupted");
|
|
chunk = (zend_mm_chunk*)ZEND_MM_ALIGNED_BASE(ptr, ZEND_MM_CHUNK_SIZE);
|
|
page_num = (int)(page_offset / ZEND_MM_PAGE_SIZE);
|
|
info = chunk->map[page_num];
|
|
ZEND_MM_CHECK(chunk->heap == heap, "zend_mm_heap corrupted");
|
|
if (EXPECTED(info & ZEND_MM_IS_SRUN)) {
|
|
int bin_num = ZEND_MM_SRUN_BIN_NUM(info);
|
|
return (zend_mm_debug_info*)((char*)ptr + bin_data_size[bin_num] - ZEND_MM_ALIGNED_SIZE(sizeof(zend_mm_debug_info)));
|
|
} else /* if (info & ZEND_MM_IS_LRUN) */ {
|
|
int pages_count = ZEND_MM_LRUN_PAGES(info);
|
|
|
|
return (zend_mm_debug_info*)((char*)ptr + ZEND_MM_PAGE_SIZE * pages_count - ZEND_MM_ALIGNED_SIZE(sizeof(zend_mm_debug_info)));
|
|
}
|
|
}
|
|
#endif
|
|
|
|
static zend_always_inline void *zend_mm_alloc_heap(zend_mm_heap *heap, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
{
|
|
void *ptr;
|
|
#if ZEND_DEBUG
|
|
size_t real_size = size;
|
|
zend_mm_debug_info *dbg;
|
|
|
|
/* special handling for zero-size allocation */
|
|
size = MAX(size, 1);
|
|
size = ZEND_MM_ALIGNED_SIZE(size) + ZEND_MM_ALIGNED_SIZE(sizeof(zend_mm_debug_info));
|
|
#endif
|
|
if (size <= ZEND_MM_MAX_SMALL_SIZE) {
|
|
ptr = zend_mm_alloc_small(heap, size, ZEND_MM_SMALL_SIZE_TO_BIN(size) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
#if ZEND_DEBUG
|
|
dbg = zend_mm_get_debug_info(heap, ptr);
|
|
dbg->size = real_size;
|
|
dbg->filename = __zend_filename;
|
|
dbg->orig_filename = __zend_orig_filename;
|
|
dbg->lineno = __zend_lineno;
|
|
dbg->orig_lineno = __zend_orig_lineno;
|
|
#endif
|
|
return ptr;
|
|
} else if (size <= ZEND_MM_MAX_LARGE_SIZE) {
|
|
ptr = zend_mm_alloc_large(heap, size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
#if ZEND_DEBUG
|
|
dbg = zend_mm_get_debug_info(heap, ptr);
|
|
dbg->size = real_size;
|
|
dbg->filename = __zend_filename;
|
|
dbg->orig_filename = __zend_orig_filename;
|
|
dbg->lineno = __zend_lineno;
|
|
dbg->orig_lineno = __zend_orig_lineno;
|
|
#endif
|
|
return ptr;
|
|
} else {
|
|
#if ZEND_DEBUG
|
|
size = real_size;
|
|
#endif
|
|
return zend_mm_alloc_huge(heap, size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
}
|
|
}
|
|
|
|
static zend_always_inline void zend_mm_free_heap(zend_mm_heap *heap, void *ptr ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
{
|
|
size_t page_offset = ZEND_MM_ALIGNED_OFFSET(ptr, ZEND_MM_CHUNK_SIZE);
|
|
|
|
if (UNEXPECTED(page_offset == 0)) {
|
|
if (ptr != NULL) {
|
|
zend_mm_free_huge(heap, ptr ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
}
|
|
} else {
|
|
zend_mm_chunk *chunk = (zend_mm_chunk*)ZEND_MM_ALIGNED_BASE(ptr, ZEND_MM_CHUNK_SIZE);
|
|
int page_num = (int)(page_offset / ZEND_MM_PAGE_SIZE);
|
|
zend_mm_page_info info = chunk->map[page_num];
|
|
|
|
ZEND_MM_CHECK(chunk->heap == heap, "zend_mm_heap corrupted");
|
|
if (EXPECTED(info & ZEND_MM_IS_SRUN)) {
|
|
zend_mm_free_small(heap, ptr, ZEND_MM_SRUN_BIN_NUM(info));
|
|
} else /* if (info & ZEND_MM_IS_LRUN) */ {
|
|
int pages_count = ZEND_MM_LRUN_PAGES(info);
|
|
|
|
ZEND_MM_CHECK(ZEND_MM_ALIGNED_OFFSET(page_offset, ZEND_MM_PAGE_SIZE) == 0, "zend_mm_heap corrupted");
|
|
zend_mm_free_large(heap, chunk, page_num, pages_count);
|
|
}
|
|
}
|
|
}
|
|
|
|
static size_t zend_mm_size(zend_mm_heap *heap, void *ptr ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
{
|
|
size_t page_offset = ZEND_MM_ALIGNED_OFFSET(ptr, ZEND_MM_CHUNK_SIZE);
|
|
|
|
if (UNEXPECTED(page_offset == 0)) {
|
|
return zend_mm_get_huge_block_size(heap, ptr ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
} else {
|
|
zend_mm_chunk *chunk;
|
|
#if 0 && ZEND_DEBUG
|
|
zend_mm_debug_info *dbg = zend_mm_get_debug_info(heap, ptr);
|
|
return dbg->size;
|
|
#else
|
|
int page_num;
|
|
zend_mm_page_info info;
|
|
|
|
chunk = (zend_mm_chunk*)ZEND_MM_ALIGNED_BASE(ptr, ZEND_MM_CHUNK_SIZE);
|
|
page_num = (int)(page_offset / ZEND_MM_PAGE_SIZE);
|
|
info = chunk->map[page_num];
|
|
ZEND_MM_CHECK(chunk->heap == heap, "zend_mm_heap corrupted");
|
|
if (EXPECTED(info & ZEND_MM_IS_SRUN)) {
|
|
return bin_data_size[ZEND_MM_SRUN_BIN_NUM(info)];
|
|
} else /* if (info & ZEND_MM_IS_LARGE_RUN) */ {
|
|
return ZEND_MM_LRUN_PAGES(info) * ZEND_MM_PAGE_SIZE;
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
|
|
static void *zend_mm_realloc_heap(zend_mm_heap *heap, void *ptr, size_t size, size_t copy_size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
{
|
|
size_t page_offset;
|
|
size_t old_size;
|
|
size_t new_size;
|
|
void *ret;
|
|
#if ZEND_DEBUG
|
|
size_t real_size;
|
|
zend_mm_debug_info *dbg;
|
|
#endif
|
|
|
|
page_offset = ZEND_MM_ALIGNED_OFFSET(ptr, ZEND_MM_CHUNK_SIZE);
|
|
if (UNEXPECTED(page_offset == 0)) {
|
|
if (UNEXPECTED(ptr == NULL)) {
|
|
return zend_mm_alloc_heap(heap, size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
}
|
|
old_size = zend_mm_get_huge_block_size(heap, ptr ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
#if ZEND_DEBUG
|
|
real_size = size;
|
|
size = ZEND_MM_ALIGNED_SIZE(size) + ZEND_MM_ALIGNED_SIZE(sizeof(zend_mm_debug_info));
|
|
#endif
|
|
if (size > ZEND_MM_MAX_LARGE_SIZE) {
|
|
#if ZEND_DEBUG
|
|
size = real_size;
|
|
#endif
|
|
new_size = ZEND_MM_ALIGNED_SIZE_EX(size, REAL_PAGE_SIZE);
|
|
if (new_size == old_size) {
|
|
#if ZEND_DEBUG
|
|
zend_mm_change_huge_block_size(heap, ptr, new_size, real_size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
#else
|
|
zend_mm_change_huge_block_size(heap, ptr, new_size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
#endif
|
|
return ptr;
|
|
} else if (new_size < old_size) {
|
|
/* unmup tail */
|
|
if (zend_mm_chunk_truncate(heap, ptr, old_size, new_size)) {
|
|
#if ZEND_MM_STAT || ZEND_MM_LIMIT
|
|
heap->real_size -= old_size - new_size;
|
|
#endif
|
|
#if ZEND_MM_STAT
|
|
heap->size -= old_size - new_size;
|
|
#endif
|
|
#if ZEND_DEBUG
|
|
zend_mm_change_huge_block_size(heap, ptr, new_size, real_size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
#else
|
|
zend_mm_change_huge_block_size(heap, ptr, new_size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
#endif
|
|
return ptr;
|
|
}
|
|
} else /* if (new_size > old_size) */ {
|
|
#if ZEND_MM_LIMIT
|
|
if (heap->real_size + (new_size - old_size) > heap->limit) {
|
|
if (heap->overflow == 0) {
|
|
#if ZEND_DEBUG
|
|
zend_mm_safe_error(heap, "Allowed memory size of %zu bytes exhausted at %s:%d (tried to allocate %zu bytes)", heap->limit, __zend_filename, __zend_lineno, size);
|
|
#else
|
|
zend_mm_safe_error(heap, "Allowed memory size of %zu bytes exhausted (tried to allocate %zu bytes)", heap->limit, size);
|
|
#endif
|
|
return NULL;
|
|
}
|
|
}
|
|
#endif
|
|
/* try to map tail right after this block */
|
|
if (zend_mm_chunk_extend(heap, ptr, old_size, new_size)) {
|
|
#if ZEND_MM_STAT || ZEND_MM_LIMIT
|
|
heap->real_size += new_size - old_size;
|
|
#endif
|
|
#if ZEND_MM_STAT
|
|
heap->size += new_size - old_size;
|
|
#endif
|
|
#if ZEND_DEBUG
|
|
zend_mm_change_huge_block_size(heap, ptr, new_size, real_size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
#else
|
|
zend_mm_change_huge_block_size(heap, ptr, new_size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
#endif
|
|
return ptr;
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
zend_mm_chunk *chunk = (zend_mm_chunk*)ZEND_MM_ALIGNED_BASE(ptr, ZEND_MM_CHUNK_SIZE);
|
|
int page_num = (int)(page_offset / ZEND_MM_PAGE_SIZE);
|
|
zend_mm_page_info info = chunk->map[page_num];
|
|
#if ZEND_DEBUG
|
|
size_t real_size = size;
|
|
|
|
size = ZEND_MM_ALIGNED_SIZE(size) + ZEND_MM_ALIGNED_SIZE(sizeof(zend_mm_debug_info));
|
|
#endif
|
|
|
|
ZEND_MM_CHECK(chunk->heap == heap, "zend_mm_heap corrupted");
|
|
if (info & ZEND_MM_IS_SRUN) {
|
|
int old_bin_num, bin_num;
|
|
|
|
old_bin_num = ZEND_MM_SRUN_BIN_NUM(info);
|
|
old_size = bin_data_size[old_bin_num];
|
|
bin_num = ZEND_MM_SMALL_SIZE_TO_BIN(size);
|
|
if (old_bin_num == bin_num) {
|
|
#if ZEND_DEBUG
|
|
dbg = zend_mm_get_debug_info(heap, ptr);
|
|
dbg->size = real_size;
|
|
dbg->filename = __zend_filename;
|
|
dbg->orig_filename = __zend_orig_filename;
|
|
dbg->lineno = __zend_lineno;
|
|
dbg->orig_lineno = __zend_orig_lineno;
|
|
#endif
|
|
return ptr;
|
|
}
|
|
} else /* if (info & ZEND_MM_IS_LARGE_RUN) */ {
|
|
ZEND_MM_CHECK(ZEND_MM_ALIGNED_OFFSET(page_offset, ZEND_MM_PAGE_SIZE) == 0, "zend_mm_heap corrupted");
|
|
old_size = ZEND_MM_LRUN_PAGES(info) * ZEND_MM_PAGE_SIZE;
|
|
if (size > ZEND_MM_MAX_SMALL_SIZE && size <= ZEND_MM_MAX_LARGE_SIZE) {
|
|
new_size = ZEND_MM_ALIGNED_SIZE_EX(size, ZEND_MM_PAGE_SIZE);
|
|
if (new_size == old_size) {
|
|
#if ZEND_DEBUG
|
|
dbg = zend_mm_get_debug_info(heap, ptr);
|
|
dbg->size = real_size;
|
|
dbg->filename = __zend_filename;
|
|
dbg->orig_filename = __zend_orig_filename;
|
|
dbg->lineno = __zend_lineno;
|
|
dbg->orig_lineno = __zend_orig_lineno;
|
|
#endif
|
|
return ptr;
|
|
} else if (new_size < old_size) {
|
|
/* free tail pages */
|
|
int new_pages_count = (int)(new_size / ZEND_MM_PAGE_SIZE);
|
|
int rest_pages_count = (int)((old_size - new_size) / ZEND_MM_PAGE_SIZE);
|
|
|
|
#if ZEND_MM_STAT
|
|
heap->size -= rest_pages_count * ZEND_MM_PAGE_SIZE;
|
|
#endif
|
|
chunk->map[page_num] = ZEND_MM_LRUN(new_pages_count);
|
|
chunk->free_pages += rest_pages_count;
|
|
zend_mm_bitset_reset_range(chunk->free_map, page_num + new_pages_count, rest_pages_count);
|
|
#if ZEND_DEBUG
|
|
dbg = zend_mm_get_debug_info(heap, ptr);
|
|
dbg->size = real_size;
|
|
dbg->filename = __zend_filename;
|
|
dbg->orig_filename = __zend_orig_filename;
|
|
dbg->lineno = __zend_lineno;
|
|
dbg->orig_lineno = __zend_orig_lineno;
|
|
#endif
|
|
return ptr;
|
|
} else /* if (new_size > old_size) */ {
|
|
int new_pages_count = (int)(new_size / ZEND_MM_PAGE_SIZE);
|
|
int old_pages_count = (int)(old_size / ZEND_MM_PAGE_SIZE);
|
|
|
|
/* try to allocate tail pages after this block */
|
|
if (page_num + new_pages_count <= ZEND_MM_PAGES &&
|
|
zend_mm_bitset_is_free_range(chunk->free_map, page_num + old_pages_count, new_pages_count - old_pages_count)) {
|
|
#if ZEND_MM_STAT
|
|
do {
|
|
size_t size = heap->size + (new_size - old_size);
|
|
size_t peak = MAX(heap->peak, size);
|
|
heap->size = size;
|
|
heap->peak = peak;
|
|
} while (0);
|
|
#endif
|
|
chunk->free_pages -= new_pages_count - old_pages_count;
|
|
zend_mm_bitset_set_range(chunk->free_map, page_num + old_pages_count, new_pages_count - old_pages_count);
|
|
chunk->map[page_num] = ZEND_MM_LRUN(new_pages_count);
|
|
#if ZEND_DEBUG
|
|
dbg = zend_mm_get_debug_info(heap, ptr);
|
|
dbg->size = real_size;
|
|
dbg->filename = __zend_filename;
|
|
dbg->orig_filename = __zend_orig_filename;
|
|
dbg->lineno = __zend_lineno;
|
|
dbg->orig_lineno = __zend_orig_lineno;
|
|
#endif
|
|
return ptr;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
#if ZEND_DEBUG
|
|
size = real_size;
|
|
#endif
|
|
}
|
|
|
|
/* Naive reallocation */
|
|
ret = zend_mm_alloc_heap(heap, size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
memcpy(ret, ptr, MIN(old_size, copy_size));
|
|
zend_mm_free_heap(heap, ptr ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
return ret;
|
|
}
|
|
|
|
/*********************/
|
|
/* Huge Runs (again) */
|
|
/*********************/
|
|
|
|
#if ZEND_DEBUG
|
|
static void zend_mm_add_huge_block(zend_mm_heap *heap, void *ptr, size_t size, size_t dbg_size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
#else
|
|
static void zend_mm_add_huge_block(zend_mm_heap *heap, void *ptr, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
#endif
|
|
{
|
|
zend_mm_huge_list *list = (zend_mm_huge_list*)zend_mm_alloc_heap(heap, sizeof(zend_mm_huge_list) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
list->ptr = ptr;
|
|
list->size = size;
|
|
list->next = heap->huge_list;
|
|
#if ZEND_DEBUG
|
|
list->dbg.size = dbg_size;
|
|
list->dbg.filename = __zend_filename;
|
|
list->dbg.orig_filename = __zend_orig_filename;
|
|
list->dbg.lineno = __zend_lineno;
|
|
list->dbg.orig_lineno = __zend_orig_lineno;
|
|
#endif
|
|
heap->huge_list = list;
|
|
}
|
|
|
|
static size_t zend_mm_del_huge_block(zend_mm_heap *heap, void *ptr ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
{
|
|
zend_mm_huge_list *prev = NULL;
|
|
zend_mm_huge_list *list = heap->huge_list;
|
|
while (list != NULL) {
|
|
if (list->ptr == ptr) {
|
|
size_t size;
|
|
|
|
if (prev) {
|
|
prev->next = list->next;
|
|
} else {
|
|
heap->huge_list = list->next;
|
|
}
|
|
size = list->size;
|
|
zend_mm_free_heap(heap, list ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
return size;
|
|
}
|
|
prev = list;
|
|
list = list->next;
|
|
}
|
|
ZEND_MM_CHECK(0, "zend_mm_heap corrupted");
|
|
return 0;
|
|
}
|
|
|
|
static size_t zend_mm_get_huge_block_size(zend_mm_heap *heap, void *ptr ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
{
|
|
zend_mm_huge_list *list = heap->huge_list;
|
|
while (list != NULL) {
|
|
if (list->ptr == ptr) {
|
|
return list->size;
|
|
}
|
|
list = list->next;
|
|
}
|
|
ZEND_MM_CHECK(0, "zend_mm_heap corrupted");
|
|
return 0;
|
|
}
|
|
|
|
#if ZEND_DEBUG
|
|
static void zend_mm_change_huge_block_size(zend_mm_heap *heap, void *ptr, size_t size, size_t dbg_size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
#else
|
|
static void zend_mm_change_huge_block_size(zend_mm_heap *heap, void *ptr, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
#endif
|
|
{
|
|
zend_mm_huge_list *list = heap->huge_list;
|
|
while (list != NULL) {
|
|
if (list->ptr == ptr) {
|
|
list->size = size;
|
|
#if ZEND_DEBUG
|
|
list->dbg.size = dbg_size;
|
|
list->dbg.filename = __zend_filename;
|
|
list->dbg.orig_filename = __zend_orig_filename;
|
|
list->dbg.lineno = __zend_lineno;
|
|
list->dbg.orig_lineno = __zend_orig_lineno;
|
|
#endif
|
|
return;
|
|
}
|
|
list = list->next;
|
|
}
|
|
}
|
|
|
|
static void *zend_mm_alloc_huge(zend_mm_heap *heap, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
{
|
|
size_t new_size = ZEND_MM_ALIGNED_SIZE_EX(size, REAL_PAGE_SIZE);
|
|
void *ptr;
|
|
|
|
#if ZEND_MM_LIMIT
|
|
if (heap->real_size + new_size > heap->limit) {
|
|
if (heap->overflow == 0) {
|
|
#if ZEND_DEBUG
|
|
zend_mm_safe_error(heap, "Allowed memory size of %zu bytes exhausted at %s:%d (tried to allocate %zu bytes)", heap->limit, __zend_filename, __zend_lineno, size);
|
|
#else
|
|
zend_mm_safe_error(heap, "Allowed memory size of %zu bytes exhausted (tried to allocate %zu bytes)", heap->limit, size);
|
|
#endif
|
|
return NULL;
|
|
}
|
|
}
|
|
#endif
|
|
ptr = zend_mm_chunk_alloc(heap, new_size, ZEND_MM_CHUNK_SIZE);
|
|
if (UNEXPECTED(ptr == NULL)) {
|
|
/* insufficient memory */
|
|
#if !ZEND_MM_LIMIT
|
|
zend_mm_safe_error(heap, "Out of memory");
|
|
#elif ZEND_DEBUG
|
|
zend_mm_safe_error(heap, "Out of memory (allocated %zu) at %s:%d (tried to allocate %zu bytes)", heap->real_size, __zend_filename, __zend_lineno, size);
|
|
#else
|
|
zend_mm_safe_error(heap, "Out of memory (allocated %zu) (tried to allocate %zu bytes)", heap->real_size, size);
|
|
#endif
|
|
return NULL;
|
|
}
|
|
#if ZEND_DEBUG
|
|
zend_mm_add_huge_block(heap, ptr, new_size, size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
#else
|
|
zend_mm_add_huge_block(heap, ptr, new_size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
#endif
|
|
#if ZEND_MM_STAT
|
|
do {
|
|
size_t size = heap->real_size + new_size;
|
|
size_t peak = MAX(heap->real_peak, size);
|
|
heap->real_size = size;
|
|
heap->real_peak = peak;
|
|
} while (0);
|
|
do {
|
|
size_t size = heap->size + new_size;
|
|
size_t peak = MAX(heap->peak, size);
|
|
heap->size = size;
|
|
heap->peak = peak;
|
|
} while (0);
|
|
#elif ZEND_MM_LIMIT
|
|
heap->real_size += new_size;
|
|
#endif
|
|
return ptr;
|
|
}
|
|
|
|
static void zend_mm_free_huge(zend_mm_heap *heap, void *ptr ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
{
|
|
size_t size;
|
|
|
|
ZEND_MM_CHECK(ZEND_MM_ALIGNED_OFFSET(ptr, ZEND_MM_CHUNK_SIZE) == 0, "zend_mm_heap corrupted");
|
|
size = zend_mm_del_huge_block(heap, ptr ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
zend_mm_chunk_free(heap, ptr, size);
|
|
#if ZEND_MM_STAT || ZEND_MM_LIMIT
|
|
heap->real_size -= size;
|
|
#endif
|
|
#if ZEND_MM_STAT
|
|
heap->size -= size;
|
|
#endif
|
|
}
|
|
|
|
/******************/
|
|
/* Initialization */
|
|
/******************/
|
|
|
|
static zend_mm_heap *zend_mm_init(void)
|
|
{
|
|
zend_mm_chunk *chunk = (zend_mm_chunk*)zend_mm_chunk_alloc_int(ZEND_MM_CHUNK_SIZE, ZEND_MM_CHUNK_SIZE);
|
|
zend_mm_heap *heap;
|
|
|
|
if (UNEXPECTED(chunk == NULL)) {
|
|
#if ZEND_MM_ERROR
|
|
#ifdef _WIN32
|
|
stderr_last_error("Can't initialize heap");
|
|
#else
|
|
fprintf(stderr, "\nCan't initialize heap: [%d] %s\n", errno, strerror(errno));
|
|
#endif
|
|
#endif
|
|
return NULL;
|
|
}
|
|
heap = &chunk->heap_slot;
|
|
chunk->heap = heap;
|
|
chunk->next = chunk;
|
|
chunk->prev = chunk;
|
|
chunk->free_pages = ZEND_MM_PAGES - ZEND_MM_FIRST_PAGE;
|
|
chunk->free_tail = ZEND_MM_FIRST_PAGE;
|
|
chunk->num = 0;
|
|
chunk->free_map[0] = (Z_L(1) << ZEND_MM_FIRST_PAGE) - 1;
|
|
chunk->map[0] = ZEND_MM_LRUN(ZEND_MM_FIRST_PAGE);
|
|
heap->main_chunk = chunk;
|
|
heap->cached_chunks = NULL;
|
|
heap->chunks_count = 1;
|
|
heap->peak_chunks_count = 1;
|
|
heap->cached_chunks_count = 0;
|
|
heap->avg_chunks_count = 1.0;
|
|
#if ZEND_MM_STAT || ZEND_MM_LIMIT
|
|
heap->real_size = ZEND_MM_CHUNK_SIZE;
|
|
#endif
|
|
#if ZEND_MM_STAT
|
|
heap->real_peak = ZEND_MM_CHUNK_SIZE;
|
|
heap->size = 0;
|
|
heap->peak = 0;
|
|
#endif
|
|
#if ZEND_MM_LIMIT
|
|
heap->limit = (Z_L(-1) >> Z_L(1));
|
|
heap->overflow = 0;
|
|
#endif
|
|
#if ZEND_MM_CUSTOM
|
|
heap->use_custom_heap = 0;
|
|
#endif
|
|
#if ZEND_MM_STORAGE
|
|
heap->storage = NULL;
|
|
#endif
|
|
heap->huge_list = NULL;
|
|
return heap;
|
|
}
|
|
|
|
#if ZEND_DEBUG
|
|
/******************/
|
|
/* Leak detection */
|
|
/******************/
|
|
|
|
static zend_long zend_mm_find_leaks_small(zend_mm_chunk *p, int i, int j, zend_leak_info *leak)
|
|
{
|
|
int empty = 1;
|
|
zend_long count = 0;
|
|
int bin_num = ZEND_MM_SRUN_BIN_NUM(p->map[i]);
|
|
zend_mm_debug_info *dbg = (zend_mm_debug_info*)((char*)p + ZEND_MM_PAGE_SIZE * i + bin_data_size[bin_num] * (j + 1) - ZEND_MM_ALIGNED_SIZE(sizeof(zend_mm_debug_info)));
|
|
|
|
while (j < bin_elements[bin_num]) {
|
|
if (dbg->size != 0) {
|
|
if (dbg->filename == leak->filename && dbg->lineno == leak->lineno) {
|
|
count++;
|
|
dbg->size = 0;
|
|
dbg->filename = NULL;
|
|
dbg->lineno = 0;
|
|
} else {
|
|
empty = 0;
|
|
}
|
|
}
|
|
j++;
|
|
dbg = (zend_mm_debug_info*)((char*)dbg + bin_data_size[bin_num]);
|
|
}
|
|
if (empty) {
|
|
zend_mm_bitset_reset_range(p->free_map, i, bin_pages[bin_num]);
|
|
}
|
|
return count;
|
|
}
|
|
|
|
static zend_long zend_mm_find_leaks(zend_mm_heap *heap, zend_mm_chunk *p, int i, zend_leak_info *leak)
|
|
{
|
|
zend_long count = 0;
|
|
|
|
do {
|
|
while (i < p->free_tail) {
|
|
if (zend_mm_bitset_is_set(p->free_map, i)) {
|
|
if (p->map[i] & ZEND_MM_IS_SRUN) {
|
|
int bin_num = ZEND_MM_SRUN_BIN_NUM(p->map[i]);
|
|
count += zend_mm_find_leaks_small(p, i, 0, leak);
|
|
i += bin_pages[bin_num];
|
|
} else /* if (p->map[i] & ZEND_MM_IS_LRUN) */ {
|
|
int pages_count = ZEND_MM_LRUN_PAGES(p->map[i]);
|
|
zend_mm_debug_info *dbg = (zend_mm_debug_info*)((char*)p + ZEND_MM_PAGE_SIZE * (i + pages_count) - ZEND_MM_ALIGNED_SIZE(sizeof(zend_mm_debug_info)));
|
|
|
|
if (dbg->filename == leak->filename && dbg->lineno == leak->lineno) {
|
|
count++;
|
|
}
|
|
zend_mm_bitset_reset_range(p->free_map, i, pages_count);
|
|
i += pages_count;
|
|
}
|
|
} else {
|
|
i++;
|
|
}
|
|
}
|
|
p = p->next;
|
|
} while (p != heap->main_chunk);
|
|
return count;
|
|
}
|
|
|
|
static void zend_mm_check_leaks(zend_mm_heap *heap)
|
|
{
|
|
zend_mm_huge_list *list;
|
|
zend_mm_chunk *p;
|
|
zend_leak_info leak;
|
|
zend_long repeated = 0;
|
|
uint32_t total = 0;
|
|
int i, j;
|
|
|
|
/* find leaked huge blocks and free them */
|
|
list = heap->huge_list;
|
|
while (list) {
|
|
zend_mm_huge_list *q = list;
|
|
|
|
heap->huge_list = list->next;
|
|
|
|
leak.addr = list->ptr;
|
|
leak.size = list->dbg.size;
|
|
leak.filename = list->dbg.filename;
|
|
leak.orig_filename = list->dbg.orig_filename;
|
|
leak.lineno = list->dbg.lineno;
|
|
leak.orig_lineno = list->dbg.orig_lineno;
|
|
|
|
zend_message_dispatcher(ZMSG_LOG_SCRIPT_NAME, NULL);
|
|
zend_message_dispatcher(ZMSG_MEMORY_LEAK_DETECTED, &leak);
|
|
//??? repeated = zend_mm_find_leaks_huge(segment, p);
|
|
total += 1 + repeated;
|
|
if (repeated) {
|
|
zend_message_dispatcher(ZMSG_MEMORY_LEAK_REPEATED, (void *)(zend_uintptr_t)repeated);
|
|
}
|
|
|
|
list = list->next;
|
|
zend_mm_chunk_free(heap, q->ptr, q->size);
|
|
zend_mm_free_heap(heap, q, NULL, 0, NULL, 0);
|
|
}
|
|
|
|
/* for each chunk */
|
|
p = heap->main_chunk;
|
|
do {
|
|
i = ZEND_MM_FIRST_PAGE;
|
|
while (i < p->free_tail) {
|
|
if (zend_mm_bitset_is_set(p->free_map, i)) {
|
|
if (p->map[i] & ZEND_MM_IS_SRUN) {
|
|
int bin_num = ZEND_MM_SRUN_BIN_NUM(p->map[i]);
|
|
zend_mm_debug_info *dbg = (zend_mm_debug_info*)((char*)p + ZEND_MM_PAGE_SIZE * i + bin_data_size[bin_num] - ZEND_MM_ALIGNED_SIZE(sizeof(zend_mm_debug_info)));
|
|
|
|
j = 0;
|
|
while (j < bin_elements[bin_num]) {
|
|
if (dbg->size != 0) {
|
|
leak.addr = (zend_mm_debug_info*)((char*)p + ZEND_MM_PAGE_SIZE * i + bin_data_size[bin_num] * j);
|
|
leak.size = dbg->size;
|
|
leak.filename = dbg->filename;
|
|
leak.orig_filename = dbg->orig_filename;
|
|
leak.lineno = dbg->lineno;
|
|
leak.orig_lineno = dbg->orig_lineno;
|
|
|
|
zend_message_dispatcher(ZMSG_LOG_SCRIPT_NAME, NULL);
|
|
zend_message_dispatcher(ZMSG_MEMORY_LEAK_DETECTED, &leak);
|
|
|
|
dbg->size = 0;
|
|
dbg->filename = NULL;
|
|
dbg->lineno = 0;
|
|
|
|
repeated = zend_mm_find_leaks_small(p, i, j + 1, &leak) +
|
|
zend_mm_find_leaks(heap, p, i + bin_pages[bin_num], &leak);
|
|
total += 1 + repeated;
|
|
if (repeated) {
|
|
zend_message_dispatcher(ZMSG_MEMORY_LEAK_REPEATED, (void *)(zend_uintptr_t)repeated);
|
|
}
|
|
}
|
|
dbg = (zend_mm_debug_info*)((char*)dbg + bin_data_size[bin_num]);
|
|
j++;
|
|
}
|
|
i += bin_pages[bin_num];
|
|
} else /* if (p->map[i] & ZEND_MM_IS_LRUN) */ {
|
|
int pages_count = ZEND_MM_LRUN_PAGES(p->map[i]);
|
|
zend_mm_debug_info *dbg = (zend_mm_debug_info*)((char*)p + ZEND_MM_PAGE_SIZE * (i + pages_count) - ZEND_MM_ALIGNED_SIZE(sizeof(zend_mm_debug_info)));
|
|
|
|
leak.addr = (void*)((char*)p + ZEND_MM_PAGE_SIZE * i);
|
|
leak.size = dbg->size;
|
|
leak.filename = dbg->filename;
|
|
leak.orig_filename = dbg->orig_filename;
|
|
leak.lineno = dbg->lineno;
|
|
leak.orig_lineno = dbg->orig_lineno;
|
|
|
|
zend_message_dispatcher(ZMSG_LOG_SCRIPT_NAME, NULL);
|
|
zend_message_dispatcher(ZMSG_MEMORY_LEAK_DETECTED, &leak);
|
|
|
|
zend_mm_bitset_reset_range(p->free_map, i, pages_count);
|
|
|
|
repeated = zend_mm_find_leaks(heap, p, i + pages_count, &leak);
|
|
total += 1 + repeated;
|
|
if (repeated) {
|
|
zend_message_dispatcher(ZMSG_MEMORY_LEAK_REPEATED, (void *)(zend_uintptr_t)repeated);
|
|
}
|
|
i += pages_count;
|
|
}
|
|
} else {
|
|
i++;
|
|
}
|
|
}
|
|
p = p->next;
|
|
} while (p != heap->main_chunk);
|
|
if (total) {
|
|
zend_message_dispatcher(ZMSG_MEMORY_LEAKS_GRAND_TOTAL, &total);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
void zend_mm_shutdown(zend_mm_heap *heap, int full, int silent)
|
|
{
|
|
zend_mm_chunk *p;
|
|
zend_mm_huge_list *list;
|
|
|
|
#if ZEND_MM_CUSTOM
|
|
if (heap->use_custom_heap) {
|
|
if (full) {
|
|
heap->_free(heap);
|
|
}
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
#if ZEND_DEBUG
|
|
if (!silent) {
|
|
zend_mm_check_leaks(heap);
|
|
}
|
|
#endif
|
|
|
|
/* free huge blocks */
|
|
list = heap->huge_list;
|
|
while (list) {
|
|
zend_mm_huge_list *q = list;
|
|
list = list->next;
|
|
zend_mm_chunk_free(heap, q->ptr, q->size);
|
|
}
|
|
|
|
/* move all chunks except of the first one into the cache */
|
|
p = heap->main_chunk->next;
|
|
while (p != heap->main_chunk) {
|
|
zend_mm_chunk *q = p->next;
|
|
p->next = heap->cached_chunks;
|
|
heap->cached_chunks = p;
|
|
p = q;
|
|
heap->chunks_count--;
|
|
heap->cached_chunks_count++;
|
|
}
|
|
|
|
if (full) {
|
|
/* free all cached chunks */
|
|
while (heap->cached_chunks) {
|
|
p = heap->cached_chunks;
|
|
heap->cached_chunks = p->next;
|
|
zend_mm_chunk_free(heap, p, ZEND_MM_CHUNK_SIZE);
|
|
}
|
|
/* free the first chunk */
|
|
zend_mm_chunk_free(heap, heap->main_chunk, ZEND_MM_CHUNK_SIZE);
|
|
} else {
|
|
zend_mm_heap old_heap;
|
|
|
|
/* free some cached chunks to keep average count */
|
|
heap->avg_chunks_count = (heap->avg_chunks_count + (double)heap->peak_chunks_count) / 2.0;
|
|
while ((double)heap->cached_chunks_count + 0.9 > heap->avg_chunks_count &&
|
|
heap->cached_chunks) {
|
|
p = heap->cached_chunks;
|
|
heap->cached_chunks = p->next;
|
|
zend_mm_chunk_free(heap, p, ZEND_MM_CHUNK_SIZE);
|
|
heap->cached_chunks_count--;
|
|
}
|
|
/* clear cached chunks */
|
|
p = heap->cached_chunks;
|
|
while (p != NULL) {
|
|
zend_mm_chunk *q = p->next;
|
|
memset(p, 0, sizeof(zend_mm_chunk));
|
|
p->next = q;
|
|
p = q;
|
|
}
|
|
|
|
/* reinitialize the first chunk and heap */
|
|
old_heap = *heap;
|
|
p = heap->main_chunk;
|
|
memset(p, 0, ZEND_MM_FIRST_PAGE * ZEND_MM_PAGE_SIZE);
|
|
*heap = old_heap;
|
|
memset(heap->free_slot, 0, sizeof(heap->free_slot));
|
|
heap->main_chunk = p;
|
|
p->heap = &p->heap_slot;
|
|
p->next = p;
|
|
p->prev = p;
|
|
p->free_pages = ZEND_MM_PAGES - ZEND_MM_FIRST_PAGE;
|
|
p->free_tail = ZEND_MM_FIRST_PAGE;
|
|
p->free_map[0] = (1L << ZEND_MM_FIRST_PAGE) - 1;
|
|
p->map[0] = ZEND_MM_LRUN(ZEND_MM_FIRST_PAGE);
|
|
heap->chunks_count = 1;
|
|
heap->peak_chunks_count = 1;
|
|
#if ZEND_MM_STAT || ZEND_MM_LIMIT
|
|
heap->real_size = ZEND_MM_CHUNK_SIZE;
|
|
#endif
|
|
#if ZEND_MM_STAT
|
|
heap->real_peak = ZEND_MM_CHUNK_SIZE;
|
|
heap->size = heap->peak = 0;
|
|
#endif
|
|
}
|
|
}
|
|
|
|
/**************/
|
|
/* PUBLIC API */
|
|
/**************/
|
|
|
|
ZEND_API void* ZEND_FASTCALL _zend_mm_alloc(zend_mm_heap *heap, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
{
|
|
return zend_mm_alloc_heap(heap, size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
}
|
|
|
|
ZEND_API void ZEND_FASTCALL _zend_mm_free(zend_mm_heap *heap, void *ptr ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
{
|
|
zend_mm_free_heap(heap, ptr ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
}
|
|
|
|
void* ZEND_FASTCALL _zend_mm_realloc(zend_mm_heap *heap, void *ptr, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
{
|
|
return zend_mm_realloc_heap(heap, ptr, size, size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
}
|
|
|
|
void* ZEND_FASTCALL _zend_mm_realloc2(zend_mm_heap *heap, void *ptr, size_t size, size_t copy_size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
{
|
|
return zend_mm_realloc_heap(heap, ptr, size, copy_size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
}
|
|
|
|
ZEND_API size_t ZEND_FASTCALL _zend_mm_block_size(zend_mm_heap *heap, void *ptr ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
{
|
|
return zend_mm_size(heap, ptr ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
}
|
|
|
|
/**********************/
|
|
/* Allocation Manager */
|
|
/**********************/
|
|
|
|
typedef struct _zend_alloc_globals {
|
|
zend_mm_heap *mm_heap;
|
|
} zend_alloc_globals;
|
|
|
|
#ifdef ZTS
|
|
static int alloc_globals_id;
|
|
# define AG(v) ZEND_TSRMG(alloc_globals_id, zend_alloc_globals *, v)
|
|
#else
|
|
# define AG(v) (alloc_globals.v)
|
|
static zend_alloc_globals alloc_globals;
|
|
#endif
|
|
|
|
ZEND_API int is_zend_mm(void)
|
|
{
|
|
#if ZEND_MM_CUSTOM
|
|
return !AG(mm_heap)->use_custom_heap;
|
|
#else
|
|
return 1;
|
|
#endif
|
|
}
|
|
|
|
#if !ZEND_DEBUG && !defined(_WIN32)
|
|
#undef _emalloc
|
|
|
|
#if ZEND_MM_CUSTOM
|
|
# define ZEND_MM_CUSTOM_ALLOCATOR(size) do { \
|
|
if (UNEXPECTED(AG(mm_heap)->use_custom_heap)) { \
|
|
return AG(mm_heap)->_malloc(size); \
|
|
} \
|
|
} while (0)
|
|
# define ZEND_MM_CUSTOM_DEALLOCATOR(ptr) do { \
|
|
if (UNEXPECTED(AG(mm_heap)->use_custom_heap)) { \
|
|
AG(mm_heap)->_free(ptr); \
|
|
return; \
|
|
} \
|
|
} while (0)
|
|
#else
|
|
# define ZEND_MM_CUSTOM_ALLOCATOR(size)
|
|
# define ZEND_MM_CUSTOM_DEALLOCATOR(ptr)
|
|
#endif
|
|
|
|
# define _ZEND_BIN_ALLOCATOR(_num, _size, _elements, _pages, x, y) \
|
|
ZEND_API void* ZEND_FASTCALL _emalloc_ ## _size(void) { \
|
|
ZEND_MM_CUSTOM_ALLOCATOR(_size); \
|
|
return zend_mm_alloc_small(AG(mm_heap), _size, _num ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC); \
|
|
}
|
|
|
|
ZEND_MM_BINS_INFO(_ZEND_BIN_ALLOCATOR, x, y)
|
|
|
|
ZEND_API void* ZEND_FASTCALL _emalloc_large(size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
{
|
|
|
|
ZEND_MM_CUSTOM_ALLOCATOR(size);
|
|
return zend_mm_alloc_large(AG(mm_heap), size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
}
|
|
|
|
ZEND_API void* ZEND_FASTCALL _emalloc_huge(size_t size)
|
|
{
|
|
|
|
ZEND_MM_CUSTOM_ALLOCATOR(size);
|
|
return zend_mm_alloc_huge(AG(mm_heap), size);
|
|
}
|
|
|
|
#if ZEND_DEBUG
|
|
# define _ZEND_BIN_FREE(_num, _size, _elements, _pages, x, y) \
|
|
ZEND_API void ZEND_FASTCALL _efree_ ## _size(void *ptr) { \
|
|
ZEND_MM_CUSTOM_DEALLOCATOR(ptr); \
|
|
{ \
|
|
size_t page_offset = ZEND_MM_ALIGNED_OFFSET(ptr, ZEND_MM_CHUNK_SIZE); \
|
|
zend_mm_chunk *chunk = (zend_mm_chunk*)ZEND_MM_ALIGNED_BASE(ptr, ZEND_MM_CHUNK_SIZE); \
|
|
int page_num = page_offset / ZEND_MM_PAGE_SIZE; \
|
|
ZEND_MM_CHECK(chunk->heap == AG(mm_heap), "zend_mm_heap corrupted"); \
|
|
ZEND_ASSERT(chunk->map[page_num] & ZEND_MM_IS_SRUN); \
|
|
ZEND_ASSERT(ZEND_MM_SRUN_BIN_NUM(chunk->map[page_num]) == _num); \
|
|
zend_mm_free_small(AG(mm_heap), ptr, _num); \
|
|
} \
|
|
}
|
|
#else
|
|
# define _ZEND_BIN_FREE(_num, _size, _elements, _pages, x, y) \
|
|
ZEND_API void ZEND_FASTCALL _efree_ ## _size(void *ptr) { \
|
|
ZEND_MM_CUSTOM_DEALLOCATOR(ptr); \
|
|
{ \
|
|
zend_mm_chunk *chunk = (zend_mm_chunk*)ZEND_MM_ALIGNED_BASE(ptr, ZEND_MM_CHUNK_SIZE); \
|
|
ZEND_MM_CHECK(chunk->heap == AG(mm_heap), "zend_mm_heap corrupted"); \
|
|
zend_mm_free_small(AG(mm_heap), ptr, _num); \
|
|
} \
|
|
}
|
|
#endif
|
|
|
|
ZEND_MM_BINS_INFO(_ZEND_BIN_FREE, x, y)
|
|
|
|
ZEND_API void ZEND_FASTCALL _efree_large(void *ptr, size_t size)
|
|
{
|
|
|
|
ZEND_MM_CUSTOM_DEALLOCATOR(ptr);
|
|
{
|
|
size_t page_offset = ZEND_MM_ALIGNED_OFFSET(ptr, ZEND_MM_CHUNK_SIZE);
|
|
zend_mm_chunk *chunk = (zend_mm_chunk*)ZEND_MM_ALIGNED_BASE(ptr, ZEND_MM_CHUNK_SIZE);
|
|
int page_num = page_offset / ZEND_MM_PAGE_SIZE;
|
|
int pages_count = ZEND_MM_ALIGNED_SIZE_EX(size, ZEND_MM_PAGE_SIZE) / ZEND_MM_PAGE_SIZE;
|
|
|
|
ZEND_MM_CHECK(chunk->heap == AG(mm_heap) && ZEND_MM_ALIGNED_OFFSET(page_offset, ZEND_MM_PAGE_SIZE) == 0, "zend_mm_heap corrupted");
|
|
ZEND_ASSERT(chunk->map[page_num] & ZEND_MM_IS_LRUN);
|
|
ZEND_ASSERT(ZEND_MM_LRUN_PAGES(chunk->map[page_num]) == pages_count);
|
|
zend_mm_free_large(AG(mm_heap), chunk, page_num, pages_count);
|
|
}
|
|
}
|
|
|
|
ZEND_API void ZEND_FASTCALL _efree_huge(void *ptr, size_t size)
|
|
{
|
|
|
|
ZEND_MM_CUSTOM_DEALLOCATOR(ptr);
|
|
// TODO: use size???
|
|
zend_mm_free_huge(AG(mm_heap), ptr);
|
|
}
|
|
#endif
|
|
|
|
ZEND_API void* ZEND_FASTCALL _emalloc(size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
{
|
|
|
|
#if ZEND_MM_CUSTOM
|
|
if (UNEXPECTED(AG(mm_heap)->use_custom_heap)) {
|
|
return AG(mm_heap)->_malloc(size);
|
|
}
|
|
#endif
|
|
return zend_mm_alloc_heap(AG(mm_heap), size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
}
|
|
|
|
ZEND_API void ZEND_FASTCALL _efree(void *ptr ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
{
|
|
|
|
#if ZEND_MM_CUSTOM
|
|
if (UNEXPECTED(AG(mm_heap)->use_custom_heap)) {
|
|
AG(mm_heap)->_free(ptr);
|
|
return;
|
|
}
|
|
#endif
|
|
zend_mm_free_heap(AG(mm_heap), ptr ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
}
|
|
|
|
ZEND_API void* ZEND_FASTCALL _erealloc(void *ptr, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
{
|
|
|
|
if (UNEXPECTED(AG(mm_heap)->use_custom_heap)) {
|
|
return AG(mm_heap)->_realloc(ptr, size);
|
|
}
|
|
return zend_mm_realloc_heap(AG(mm_heap), ptr, size, size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
}
|
|
|
|
ZEND_API void* ZEND_FASTCALL _erealloc2(void *ptr, size_t size, size_t copy_size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
{
|
|
|
|
if (UNEXPECTED(AG(mm_heap)->use_custom_heap)) {
|
|
return AG(mm_heap)->_realloc(ptr, size);
|
|
}
|
|
return zend_mm_realloc_heap(AG(mm_heap), ptr, size, copy_size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
}
|
|
|
|
ZEND_API size_t ZEND_FASTCALL _zend_mem_block_size(void *ptr ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
{
|
|
if (UNEXPECTED(AG(mm_heap)->use_custom_heap)) {
|
|
return 0;
|
|
}
|
|
return zend_mm_size(AG(mm_heap), ptr ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
}
|
|
|
|
static zend_always_inline size_t safe_address(size_t nmemb, size_t size, size_t offset)
|
|
{
|
|
int overflow;
|
|
size_t ret = zend_safe_address(nmemb, size, offset, &overflow);
|
|
|
|
if (UNEXPECTED(overflow)) {
|
|
zend_error_noreturn(E_ERROR, "Possible integer overflow in memory allocation (%zu * %zu + %zu)", nmemb, size, offset);
|
|
return 0;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
ZEND_API void* ZEND_FASTCALL _safe_emalloc(size_t nmemb, size_t size, size_t offset ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
{
|
|
return emalloc_rel(safe_address(nmemb, size, offset));
|
|
}
|
|
|
|
ZEND_API void* ZEND_FASTCALL _safe_malloc(size_t nmemb, size_t size, size_t offset)
|
|
{
|
|
return pemalloc(safe_address(nmemb, size, offset), 1);
|
|
}
|
|
|
|
ZEND_API void* ZEND_FASTCALL _safe_erealloc(void *ptr, size_t nmemb, size_t size, size_t offset ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
{
|
|
return erealloc_rel(ptr, safe_address(nmemb, size, offset));
|
|
}
|
|
|
|
ZEND_API void* ZEND_FASTCALL _safe_realloc(void *ptr, size_t nmemb, size_t size, size_t offset)
|
|
{
|
|
return perealloc(ptr, safe_address(nmemb, size, offset), 1);
|
|
}
|
|
|
|
|
|
ZEND_API void* ZEND_FASTCALL _ecalloc(size_t nmemb, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
{
|
|
void *p;
|
|
|
|
HANDLE_BLOCK_INTERRUPTIONS();
|
|
|
|
p = _safe_emalloc(nmemb, size, 0 ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
if (UNEXPECTED(p == NULL)) {
|
|
HANDLE_UNBLOCK_INTERRUPTIONS();
|
|
return p;
|
|
}
|
|
memset(p, 0, size * nmemb);
|
|
HANDLE_UNBLOCK_INTERRUPTIONS();
|
|
return p;
|
|
}
|
|
|
|
ZEND_API char* ZEND_FASTCALL _estrdup(const char *s ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
{
|
|
size_t length;
|
|
char *p;
|
|
|
|
HANDLE_BLOCK_INTERRUPTIONS();
|
|
|
|
length = strlen(s);
|
|
p = (char *) _emalloc(safe_address(length, 1, 1) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
if (UNEXPECTED(p == NULL)) {
|
|
HANDLE_UNBLOCK_INTERRUPTIONS();
|
|
return p;
|
|
}
|
|
memcpy(p, s, length+1);
|
|
HANDLE_UNBLOCK_INTERRUPTIONS();
|
|
return p;
|
|
}
|
|
|
|
ZEND_API char* ZEND_FASTCALL _estrndup(const char *s, size_t length ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
{
|
|
char *p;
|
|
|
|
HANDLE_BLOCK_INTERRUPTIONS();
|
|
|
|
p = (char *) _emalloc(safe_address(length, 1, 1) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
if (UNEXPECTED(p == NULL)) {
|
|
HANDLE_UNBLOCK_INTERRUPTIONS();
|
|
return p;
|
|
}
|
|
memcpy(p, s, length);
|
|
p[length] = 0;
|
|
HANDLE_UNBLOCK_INTERRUPTIONS();
|
|
return p;
|
|
}
|
|
|
|
|
|
ZEND_API char* ZEND_FASTCALL zend_strndup(const char *s, size_t length)
|
|
{
|
|
char *p;
|
|
|
|
HANDLE_BLOCK_INTERRUPTIONS();
|
|
|
|
p = (char *) malloc(safe_address(length, 1, 1));
|
|
if (UNEXPECTED(p == NULL)) {
|
|
HANDLE_UNBLOCK_INTERRUPTIONS();
|
|
return p;
|
|
}
|
|
if (length) {
|
|
memcpy(p, s, length);
|
|
}
|
|
p[length] = 0;
|
|
HANDLE_UNBLOCK_INTERRUPTIONS();
|
|
return p;
|
|
}
|
|
|
|
|
|
ZEND_API int zend_set_memory_limit(size_t memory_limit)
|
|
{
|
|
#if ZEND_MM_LIMIT
|
|
AG(mm_heap)->limit = (memory_limit >= ZEND_MM_CHUNK_SIZE) ? memory_limit : ZEND_MM_CHUNK_SIZE;
|
|
#endif
|
|
return SUCCESS;
|
|
}
|
|
|
|
ZEND_API size_t zend_memory_usage(int real_usage)
|
|
{
|
|
#if ZEND_MM_STAT
|
|
if (real_usage) {
|
|
return AG(mm_heap)->real_size;
|
|
} else {
|
|
size_t usage = AG(mm_heap)->size;
|
|
return usage;
|
|
}
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
ZEND_API size_t zend_memory_peak_usage(int real_usage)
|
|
{
|
|
#if ZEND_MM_STAT
|
|
if (real_usage) {
|
|
return AG(mm_heap)->real_peak;
|
|
} else {
|
|
return AG(mm_heap)->peak;
|
|
}
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
ZEND_API void shutdown_memory_manager(int silent, int full_shutdown)
|
|
{
|
|
zend_mm_shutdown(AG(mm_heap), full_shutdown, silent);
|
|
}
|
|
|
|
static void alloc_globals_ctor(zend_alloc_globals *alloc_globals)
|
|
{
|
|
#if ZEND_MM_CUSTOM
|
|
char *tmp = getenv("USE_ZEND_ALLOC");
|
|
|
|
if (tmp && !zend_atoi(tmp, 0)) {
|
|
alloc_globals->mm_heap = malloc(sizeof(zend_mm_heap));
|
|
memset(alloc_globals->mm_heap, 0, sizeof(zend_mm_heap));
|
|
alloc_globals->mm_heap->use_custom_heap = 1;
|
|
alloc_globals->mm_heap->_malloc = malloc;
|
|
alloc_globals->mm_heap->_free = free;
|
|
alloc_globals->mm_heap->_realloc = realloc;
|
|
return;
|
|
}
|
|
#endif
|
|
ZEND_TSRMLS_CACHE_UPDATE();
|
|
alloc_globals->mm_heap = zend_mm_init();
|
|
}
|
|
|
|
#ifdef ZTS
|
|
static void alloc_globals_dtor(zend_alloc_globals *alloc_globals)
|
|
{
|
|
zend_mm_shutdown(alloc_globals->mm_heap, 1, 1);
|
|
}
|
|
#endif
|
|
|
|
ZEND_API void start_memory_manager(void)
|
|
{
|
|
#ifdef ZTS
|
|
ts_allocate_id(&alloc_globals_id, sizeof(zend_alloc_globals), (ts_allocate_ctor) alloc_globals_ctor, (ts_allocate_dtor) alloc_globals_dtor);
|
|
#else
|
|
alloc_globals_ctor(&alloc_globals);
|
|
#endif
|
|
#ifndef _WIN32
|
|
# if defined(_SC_PAGESIZE)
|
|
REAL_PAGE_SIZE = sysconf(_SC_PAGESIZE);
|
|
# elif defined(_SC_PAGE_SIZE)
|
|
REAL_PAGE_SIZE = sysconf(_SC_PAGE_SIZE);
|
|
# endif
|
|
#endif
|
|
}
|
|
|
|
ZEND_API zend_mm_heap *zend_mm_set_heap(zend_mm_heap *new_heap)
|
|
{
|
|
zend_mm_heap *old_heap;
|
|
|
|
old_heap = AG(mm_heap);
|
|
AG(mm_heap) = (zend_mm_heap*)new_heap;
|
|
return (zend_mm_heap*)old_heap;
|
|
}
|
|
|
|
ZEND_API void zend_mm_set_custom_handlers(zend_mm_heap *heap,
|
|
void* (*_malloc)(size_t),
|
|
void (*_free)(void*),
|
|
void* (*_realloc)(void*, size_t))
|
|
{
|
|
#if ZEND_MM_CUSTOM
|
|
zend_mm_heap *_heap = (zend_mm_heap*)heap;
|
|
|
|
_heap->use_custom_heap = 1;
|
|
_heap->_malloc = _malloc;
|
|
_heap->_free = _free;
|
|
_heap->_realloc = _realloc;
|
|
#endif
|
|
}
|
|
|
|
ZEND_API void zend_mm_get_custom_handlers(zend_mm_heap *heap,
|
|
void* (**_malloc)(size_t),
|
|
void (**_free)(void*),
|
|
void* (**_realloc)(void*, size_t))
|
|
{
|
|
#if ZEND_MM_CUSTOM
|
|
zend_mm_heap *_heap = (zend_mm_heap*)heap;
|
|
|
|
if (heap->use_custom_heap) {
|
|
*_malloc = _heap->_malloc;
|
|
*_free = _heap->_free;
|
|
*_realloc = _heap->_realloc;
|
|
} else {
|
|
*_malloc = NULL;
|
|
*_free = NULL;
|
|
*_realloc = NULL;
|
|
}
|
|
#else
|
|
*_malloc = NULL;
|
|
*_free = NULL;
|
|
*_realloc = NULL;
|
|
#endif
|
|
}
|
|
|
|
ZEND_API zend_mm_storage *zend_mm_get_storage(zend_mm_heap *heap)
|
|
{
|
|
#if ZEND_MM_STORAGE
|
|
return heap->storage;
|
|
#else
|
|
return NULL
|
|
#endif
|
|
}
|
|
|
|
ZEND_API zend_mm_heap *zend_mm_startup(void)
|
|
{
|
|
return zend_mm_init();
|
|
}
|
|
|
|
ZEND_API zend_mm_heap *zend_mm_startup_ex(const zend_mm_handlers *handlers, void *data, size_t data_size)
|
|
{
|
|
#if ZEND_MM_STORAGE
|
|
zend_mm_storage tmp_storage, *storage;
|
|
zend_mm_chunk *chunk;
|
|
zend_mm_heap *heap;
|
|
|
|
memcpy((zend_mm_handlers*)&tmp_storage.handlers, handlers, sizeof(zend_mm_handlers));
|
|
tmp_storage.data = data;
|
|
chunk = (zend_mm_chunk*)handlers->chunk_alloc(&tmp_storage, ZEND_MM_CHUNK_SIZE, ZEND_MM_CHUNK_SIZE);
|
|
if (UNEXPECTED(chunk == NULL)) {
|
|
#if ZEND_MM_ERROR
|
|
#ifdef _WIN32
|
|
stderr_last_error("Can't initialize heap");
|
|
#else
|
|
fprintf(stderr, "\nCan't initialize heap: [%d] %s\n", errno, strerror(errno));
|
|
#endif
|
|
#endif
|
|
return NULL;
|
|
}
|
|
heap = &chunk->heap_slot;
|
|
chunk->heap = heap;
|
|
chunk->next = chunk;
|
|
chunk->prev = chunk;
|
|
chunk->free_pages = ZEND_MM_PAGES - ZEND_MM_FIRST_PAGE;
|
|
chunk->free_tail = ZEND_MM_FIRST_PAGE;
|
|
chunk->num = 0;
|
|
chunk->free_map[0] = (Z_L(1) << ZEND_MM_FIRST_PAGE) - 1;
|
|
chunk->map[0] = ZEND_MM_LRUN(ZEND_MM_FIRST_PAGE);
|
|
heap->main_chunk = chunk;
|
|
heap->cached_chunks = NULL;
|
|
heap->chunks_count = 1;
|
|
heap->peak_chunks_count = 1;
|
|
heap->cached_chunks_count = 0;
|
|
heap->avg_chunks_count = 1.0;
|
|
#if ZEND_MM_STAT || ZEND_MM_LIMIT
|
|
heap->real_size = ZEND_MM_CHUNK_SIZE;
|
|
#endif
|
|
#if ZEND_MM_STAT
|
|
heap->real_peak = ZEND_MM_CHUNK_SIZE;
|
|
heap->size = 0;
|
|
heap->peak = 0;
|
|
#endif
|
|
#if ZEND_MM_LIMIT
|
|
heap->limit = (Z_L(-1) >> Z_L(1));
|
|
heap->overflow = 0;
|
|
#endif
|
|
#if ZEND_MM_CUSTOM
|
|
heap->use_custom_heap = 0;
|
|
#endif
|
|
heap->storage = &tmp_storage;
|
|
heap->huge_list = NULL;
|
|
storage = _zend_mm_alloc(heap, sizeof(zend_mm_storage) + data_size ZEND_FILE_LINE_CC ZEND_FILE_LINE_CC);
|
|
if (!storage) {
|
|
handlers->chunk_free(&tmp_storage, chunk, ZEND_MM_CHUNK_SIZE);
|
|
#if ZEND_MM_ERROR
|
|
#ifdef _WIN32
|
|
stderr_last_error("Can't initialize heap");
|
|
#else
|
|
fprintf(stderr, "\nCan't initialize heap: [%d] %s\n", errno, strerror(errno));
|
|
#endif
|
|
#endif
|
|
return NULL;
|
|
}
|
|
memcpy(storage, &tmp_storage, sizeof(zend_mm_storage));
|
|
if (data) {
|
|
storage->data = (void*)(((char*)storage + sizeof(zend_mm_storage)));
|
|
memcpy(storage->data, data, data_size);
|
|
}
|
|
heap->storage = storage;
|
|
return heap;
|
|
#else
|
|
return NULL;
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Local variables:
|
|
* tab-width: 4
|
|
* c-basic-offset: 4
|
|
* indent-tabs-mode: t
|
|
* End:
|
|
*/
|