mirror of
https://github.com/php/php-src.git
synced 2024-10-20 07:53:58 +00:00
2114 lines
59 KiB
C
2114 lines
59 KiB
C
/*
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+----------------------------------------------------------------------+
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| Zend Engine |
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+----------------------------------------------------------------------+
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| Copyright (c) 1998-2007 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 Sogov <dmitry@zend.com> |
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+----------------------------------------------------------------------+
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*/
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/* $Id$ */
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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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#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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# define _WIN32_WINNT 0x0400
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# include <wincrypt.h>
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# include <process.h>
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#endif
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#ifndef ZEND_MM_HEAP_PROTECTION
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# define ZEND_MM_HEAP_PROTECTION ZEND_DEBUG
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#endif
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#ifndef ZEND_MM_SAFE_UNLINKING
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# define ZEND_MM_SAFE_UNLINKING 1
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#endif
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#ifndef ZEND_MM_COOKIES
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# define ZEND_MM_COOKIES 1
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#endif
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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);
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#endif
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}
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#endif
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#if (defined (__GNUC__) && __GNUC__ > 2 ) && !defined(__INTEL_COMPILER) && !defined(DARWIN) && !defined(__hpux) && !defined(_AIX)
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# define EXPECTED(condition) __builtin_expect(condition, 1)
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# define UNEXPECTED(condition) __builtin_expect(condition, 0)
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static void zend_mm_panic(const char *message) __attribute__ ((noreturn));
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#else
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# define EXPECTED(condition) (condition)
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# define UNEXPECTED(condition) (condition)
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#endif
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static void zend_mm_panic(const char *message)
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{
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fprintf(stderr, "%s\n", message);
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#if ZEND_DEBUG && defined(HAVE_KILL) && defined(HAVE_GETPID)
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kill(getpid(), SIGSEGV);
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#else
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exit(1);
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#endif
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}
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/*******************/
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/* Storage Manager */
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/*******************/
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#ifdef ZEND_WIN32
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# define HAVE_MEM_WIN32 /* use VirtualAlloc() to allocate memory */
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#endif
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#define HAVE_MEM_MALLOC /* use malloc() to allocate segments */
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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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#if defined(HAVE_MEM_MMAP_ANON) || defined(HAVE_MEM_MMAP_ZERO)
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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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#endif
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static zend_mm_storage* zend_mm_mem_dummy_init(void *params)
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{
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return malloc(sizeof(zend_mm_storage));
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}
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static void zend_mm_mem_dummy_dtor(zend_mm_storage *storage)
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{
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free(storage);
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}
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#if defined(HAVE_MEM_MMAP_ANON) || defined(HAVE_MEM_MMAP_ZERO)
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static zend_mm_segment* zend_mm_mem_mmap_realloc(zend_mm_storage *storage, zend_mm_segment* segment, size_t size)
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{
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zend_mm_segment *ret;
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#ifdef HAVE_MREMAP
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ret = (zend_mm_segment*)mremap(segment, segment->size, size, MREMAP_MAYMOVE);
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if (ret == MAP_FAILED) {
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#endif
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ret = storage->handlers->_alloc(storage, size);
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if (ret) {
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memcpy(ret, segment, size > segment->size ? segment->size : size);
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storage->handlers->_free(storage, segment);
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}
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#ifdef HAVE_MREMAP
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}
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#endif
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return ret;
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}
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static void zend_mm_mem_mmap_free(zend_mm_storage *storage, zend_mm_segment* segment)
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{
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munmap(segment, segment->size);
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}
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#endif
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#ifdef HAVE_MEM_MMAP_ANON
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static zend_mm_segment* zend_mm_mem_mmap_anon_alloc(zend_mm_storage *storage, size_t size)
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{
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zend_mm_segment *ret = (zend_mm_segment*)mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON, -1, 0);
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if (ret == MAP_FAILED) {
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ret = NULL;
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}
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return ret;
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}
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# define ZEND_MM_MEM_MMAP_ANON_DSC {"mmap_anon", zend_mm_mem_dummy_init, zend_mm_mem_dummy_dtor, zend_mm_mem_mmap_anon_alloc, zend_mm_mem_mmap_realloc, zend_mm_mem_mmap_free}
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#endif
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#ifdef HAVE_MEM_MMAP_ZERO
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static int zend_mm_dev_zero_fd = -1;
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static zend_mm_storage* zend_mm_mem_mmap_zero_init(void *params)
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{
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if (zend_mm_dev_zero_fd != -1) {
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zend_mm_dev_zero_fd = open("/dev/zero", O_RDWR, S_IRUSR | S_IWUSR);
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}
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if (zend_mm_dev_zero_fd >= 0) {
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return malloc(sizeof(zend_mm_storage));
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} else {
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return NULL;
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}
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}
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static void zend_mm_mem_mmap_zero_dtor(zend_mm_storage *storage)
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{
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close(zend_mm_dev_zero_fd);
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free(storage);
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}
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static zend_mm_segment* zend_mm_mem_mmap_zero_alloc(zend_mm_storage *storage, size_t size)
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{
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zend_mm_segment *ret = (zend_mm_segment*)mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_PRIVATE, zend_mm_dev_zero_fd, 0);
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if (ret == MAP_FAILED) {
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ret = NULL;
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}
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return ret;
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}
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# define ZEND_MM_MEM_MMAP_ZERO_DSC {"mmap_zero", zend_mm_mem_mmap_zero_init, zend_mm_mem_mmap_zero_dtor, zend_mm_mem_mmap_zero_alloc, zend_mm_mem_mmap_realloc, zend_mm_mem_mmap_free}
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#endif
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#ifdef HAVE_MEM_WIN32
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static zend_mm_storage* zend_mm_mem_win32_init(void *params)
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{
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HANDLE heap = HeapCreate(HEAP_NO_SERIALIZE, 0, 0);
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zend_mm_storage* storage;
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if (heap == NULL) {
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return NULL;
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}
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storage = (zend_mm_storage*)malloc(sizeof(zend_mm_storage));
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storage->data = (void*) heap;
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return storage;
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}
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static void zend_mm_mem_win32_dtor(zend_mm_storage *storage)
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{
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HeapDestroy((HANDLE)storage->data);
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free(storage);
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}
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static zend_mm_segment* zend_mm_mem_win32_alloc(zend_mm_storage *storage, size_t size)
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{
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return (zend_mm_segment*) HeapAlloc((HANDLE)storage->data, HEAP_NO_SERIALIZE, size);
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}
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static void zend_mm_mem_win32_free(zend_mm_storage *storage, zend_mm_segment* segment)
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{
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HeapFree((HANDLE)storage->data, HEAP_NO_SERIALIZE, segment);
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}
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static zend_mm_segment* zend_mm_mem_win32_realloc(zend_mm_storage *storage, zend_mm_segment* segment, size_t size)
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{
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return (zend_mm_segment*) HeapReAlloc((HANDLE)storage->data, HEAP_NO_SERIALIZE, segment, size);
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}
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# define ZEND_MM_MEM_WIN32_DSC {"win32", zend_mm_mem_win32_init, zend_mm_mem_win32_dtor, zend_mm_mem_win32_alloc, zend_mm_mem_win32_realloc, zend_mm_mem_win32_free}
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#endif
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#ifdef HAVE_MEM_MALLOC
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static zend_mm_segment* zend_mm_mem_malloc_alloc(zend_mm_storage *storage, size_t size)
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{
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return (zend_mm_segment*)malloc(size);
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}
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static zend_mm_segment* zend_mm_mem_malloc_realloc(zend_mm_storage *storage, zend_mm_segment *ptr, size_t size)
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{
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return (zend_mm_segment*)realloc(ptr, size);
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}
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static void zend_mm_mem_malloc_free(zend_mm_storage *storage, zend_mm_segment *ptr)
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{
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free(ptr);
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}
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# define ZEND_MM_MEM_MALLOC_DSC {"malloc", zend_mm_mem_dummy_init, zend_mm_mem_dummy_dtor, zend_mm_mem_malloc_alloc, zend_mm_mem_malloc_realloc, zend_mm_mem_malloc_free}
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#endif
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static const zend_mm_mem_handlers mem_handlers[] = {
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#ifdef HAVE_MEM_WIN32
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ZEND_MM_MEM_WIN32_DSC,
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#endif
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#ifdef HAVE_MEM_MALLOC
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ZEND_MM_MEM_MALLOC_DSC,
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#endif
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#ifdef HAVE_MEM_MMAP_ANON
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ZEND_MM_MEM_MMAP_ANON_DSC,
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#endif
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#ifdef HAVE_MEM_MMAP_ZERO
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ZEND_MM_MEM_MMAP_ZERO_DSC,
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#endif
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{NULL, NULL, NULL, NULL, NULL, NULL}
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};
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# define ZEND_MM_STORAGE_DTOR() heap->storage->handlers->dtor(heap->storage)
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# define ZEND_MM_STORAGE_ALLOC(size) heap->storage->handlers->_alloc(heap->storage, size)
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# define ZEND_MM_STORAGE_REALLOC(ptr, size) heap->storage->handlers->_realloc(heap->storage, ptr, size)
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# define ZEND_MM_STORAGE_FREE(ptr) heap->storage->handlers->_free(heap->storage, ptr)
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/****************/
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/* Heap Manager */
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/****************/
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typedef enum _mem_magic {
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MEM_BLOCK_VALID = 0x7312F8DC,
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MEM_BLOCK_FREED = 0x99954317,
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MEM_BLOCK_CACHED = 0xFB8277DC,
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MEM_BLOCK_GUARD = 0x2A8FCC84,
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MEM_BLOCK_LEAK = 0x6C5E8F2D
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} mem_magic;
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/* mm block type */
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typedef struct _zend_mm_block_info {
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#if ZEND_MM_COOKIES
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unsigned long _cookie;
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#endif
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size_t _size;
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size_t _prev;
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} zend_mm_block_info;
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#if ZEND_DEBUG
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typedef struct _zend_mm_debug_info {
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char *filename;
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uint lineno;
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char *orig_filename;
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uint orig_lineno;
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size_t size;
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#if ZEND_MM_HEAP_PROTECTION
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unsigned int start_magic;
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#endif
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} zend_mm_debug_info;
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#elif ZEND_MM_HEAP_PROTECTION
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typedef struct _zend_mm_debug_info {
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size_t size;
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unsigned int start_magic;
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} zend_mm_debug_info;
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#endif
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typedef struct _zend_mm_block {
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zend_mm_block_info info;
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#if ZEND_DEBUG
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mem_magic magic;
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# ifdef ZTS
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THREAD_T thread_id;
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# endif
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zend_mm_debug_info debug;
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#elif ZEND_MM_HEAP_PROTECTION
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zend_mm_debug_info debug;
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#endif
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} zend_mm_block;
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typedef struct _zend_mm_free_block {
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zend_mm_block_info info;
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#if ZEND_DEBUG
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mem_magic magic;
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# ifdef ZTS
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THREAD_T thread_id;
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# endif
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#endif
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struct _zend_mm_free_block *prev_free_block;
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struct _zend_mm_free_block *next_free_block;
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} zend_mm_free_block;
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#define ZEND_MM_NUM_BUCKETS 32
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#define ZEND_MM_CACHE 1
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#define ZEND_MM_CACHE_SIZE (32*1024)
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struct _zend_mm_heap {
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unsigned int free_bitmap;
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size_t block_size;
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zend_mm_segment *segments_list;
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zend_mm_storage *storage;
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size_t real_size;
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size_t real_peak;
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size_t limit;
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size_t size;
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size_t peak;
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void *reserve;
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int use_zend_alloc;
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int overflow;
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#if ZEND_MM_CACHE
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unsigned int cached;
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zend_mm_free_block *cache[ZEND_MM_NUM_BUCKETS];
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#endif
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zend_mm_free_block free_buckets[ZEND_MM_NUM_BUCKETS];
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};
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#if ZEND_MM_COOKIES
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static unsigned int _zend_mm_cookie = 0;
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# define ZEND_MM_COOKIE(block) \
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(((unsigned long)(block)) ^ _zend_mm_cookie)
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# define ZEND_MM_SET_COOKIE(block) \
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(block)->info._cookie = ZEND_MM_COOKIE(block)
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# define ZEND_MM_CHECK_COOKIE(block) \
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if (UNEXPECTED((block)->info._cookie != ZEND_MM_COOKIE(block))) { \
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zend_mm_panic("zend_mm_heap corrupted"); \
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}
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#else
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# define ZEND_MM_SET_COOKIE(block)
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# define ZEND_MM_CHECK_COOKIE(block)
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#endif
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/* Reserved space for error reporting in case of memory overflow */
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#define ZEND_MM_RESERVE_SIZE 8*1024
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#define ZEND_MM_TYPE_MASK 0x3L
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#define ZEND_MM_FREE_BLOCK 0x0L
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#define ZEND_MM_USED_BLOCK 0x1L
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#define ZEND_MM_GUARD_BLOCK 0x3L
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#define ZEND_MM_BLOCK(b, type, size) do { \
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size_t _size = (size); \
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(b)->info._size = (type) | _size; \
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ZEND_MM_BLOCK_AT(b, _size)->info._prev = (type) | _size; \
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ZEND_MM_SET_COOKIE(b); \
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} while (0);
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#define ZEND_MM_LAST_BLOCK(b) do { \
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(b)->info._size = ZEND_MM_GUARD_BLOCK | ZEND_MM_ALIGNED_HEADER_SIZE; \
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ZEND_MM_SET_MAGIC(b, MEM_BLOCK_GUARD); \
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} while (0);
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#define ZEND_MM_BLOCK_SIZE(b) ((b)->info._size & ~ZEND_MM_TYPE_MASK)
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#define ZEND_MM_IS_FREE_BLOCK(b) (!((b)->info._size & ZEND_MM_USED_BLOCK))
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#define ZEND_MM_IS_USED_BLOCK(b) ((b)->info._size & ZEND_MM_USED_BLOCK)
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#define ZEND_MM_IS_GUARD_BLOCK(b) (((b)->info._size & ZEND_MM_TYPE_MASK) == ZEND_MM_GUARD_BLOCK)
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#define ZEND_MM_NEXT_BLOCK(b) ZEND_MM_BLOCK_AT(b, ZEND_MM_BLOCK_SIZE(b))
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#define ZEND_MM_PREV_BLOCK(b) ZEND_MM_BLOCK_AT(b, -(int)((b)->info._prev & ~ZEND_MM_TYPE_MASK))
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#define ZEND_MM_PREV_BLOCK_IS_FREE(b) (!((b)->info._prev & ZEND_MM_USED_BLOCK))
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#define ZEND_MM_MARK_FIRST_BLOCK(b) ((b)->info._prev = ZEND_MM_GUARD_BLOCK)
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#define ZEND_MM_IS_FIRST_BLOCK(b) ((b)->info._prev == ZEND_MM_GUARD_BLOCK)
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/* optimized access */
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#define ZEND_MM_FREE_BLOCK_SIZE(b) (b)->info._size
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#ifndef ZEND_MM_ALIGNMENT
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# define ZEND_MM_ALIGNMENT 8
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# define ZEND_MM_ALIGNMENT_LOG2 3
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#elif ZEND_MM_ALIGNMENT < 4
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# undef ZEND_MM_ALIGNMENT
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# undef ZEND_MM_ALIGNMENT_LOG2
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# define ZEND_MM_ALIGNMENT 4
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# define ZEND_MM_ALIGNMENT_LOG2 2
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#endif
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#define ZEND_MM_ALIGNMENT_MASK ~(ZEND_MM_ALIGNMENT-1)
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/* Aligned header size */
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#define ZEND_MM_ALIGNED_SIZE(size) ((size + ZEND_MM_ALIGNMENT - 1) & ZEND_MM_ALIGNMENT_MASK)
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#define ZEND_MM_ALIGNED_HEADER_SIZE ZEND_MM_ALIGNED_SIZE(sizeof(zend_mm_block))
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#define ZEND_MM_ALIGNED_FREE_HEADER_SIZE ZEND_MM_ALIGNED_SIZE(sizeof(zend_mm_free_block))
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#define ZEND_MM_MIN_ALLOC_BLOCK_SIZE ZEND_MM_ALIGNED_SIZE(ZEND_MM_ALIGNED_HEADER_SIZE + END_MAGIC_SIZE)
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#define ZEND_MM_ALIGNED_MIN_HEADER_SIZE (ZEND_MM_MIN_ALLOC_BLOCK_SIZE>ZEND_MM_ALIGNED_FREE_HEADER_SIZE?ZEND_MM_MIN_ALLOC_BLOCK_SIZE:ZEND_MM_ALIGNED_FREE_HEADER_SIZE)
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#define ZEND_MM_ALIGNED_SEGMENT_SIZE ZEND_MM_ALIGNED_SIZE(sizeof(zend_mm_segment))
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#define ZEND_MM_MIN_SIZE ((ZEND_MM_ALIGNED_MIN_HEADER_SIZE>(ZEND_MM_ALIGNED_HEADER_SIZE+END_MAGIC_SIZE))?(ZEND_MM_ALIGNED_MIN_HEADER_SIZE-(ZEND_MM_ALIGNED_HEADER_SIZE+END_MAGIC_SIZE)):0)
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|
|
#define ZEND_MM_MAX_SMALL_SIZE (((ZEND_MM_NUM_BUCKETS-1)<<ZEND_MM_ALIGNMENT_LOG2)+ZEND_MM_ALIGNED_MIN_HEADER_SIZE)
|
|
|
|
#define ZEND_MM_TRUE_SIZE(size) ((size<ZEND_MM_MIN_SIZE)?(ZEND_MM_ALIGNED_MIN_HEADER_SIZE):(ZEND_MM_ALIGNED_SIZE(size+ZEND_MM_ALIGNED_HEADER_SIZE+END_MAGIC_SIZE)))
|
|
|
|
#define ZEND_MM_BUCKET_INDEX(true_size) ((true_size>>ZEND_MM_ALIGNMENT_LOG2)-(ZEND_MM_ALIGNED_MIN_HEADER_SIZE>>ZEND_MM_ALIGNMENT_LOG2)+1)
|
|
|
|
#define ZEND_MM_SMALL_SIZE(true_size) (true_size < ZEND_MM_MAX_SMALL_SIZE)
|
|
|
|
/* Memory calculations */
|
|
#define ZEND_MM_BLOCK_AT(blk, offset) ((zend_mm_block *) (((char *) (blk))+(offset)))
|
|
#define ZEND_MM_DATA_OF(p) ((void *) (((char *) (p))+ZEND_MM_ALIGNED_HEADER_SIZE))
|
|
#define ZEND_MM_HEADER_OF(blk) ZEND_MM_BLOCK_AT(blk, -(int)ZEND_MM_ALIGNED_HEADER_SIZE)
|
|
|
|
/* Debug output */
|
|
#if ZEND_DEBUG
|
|
|
|
# ifdef ZTS
|
|
# define ZEND_MM_SET_THREAD_ID(block) \
|
|
((zend_mm_block*)(block))->thread_id = tsrm_thread_id()
|
|
# define ZEND_MM_BAD_THREAD_ID(block) ((block)->thread_id != tsrm_thread_id())
|
|
# else
|
|
# define ZEND_MM_SET_THREAD_ID(block)
|
|
# define ZEND_MM_BAD_THREAD_ID(block) 0
|
|
# endif
|
|
|
|
# define ZEND_MM_VALID_PTR(block) \
|
|
zend_mm_check_ptr(heap, block, 1 ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC)
|
|
|
|
# define ZEND_MM_SET_MAGIC(block, val) do { \
|
|
(block)->magic = (val); \
|
|
} while (0)
|
|
|
|
# define ZEND_MM_CHECK_MAGIC(block, val) do { \
|
|
if ((block)->magic != (val)) { \
|
|
zend_mm_panic("zend_mm_heap corrupted"); \
|
|
} \
|
|
} while (0)
|
|
|
|
# define ZEND_MM_SET_DEBUG_INFO(block, __size, set_valid, set_thread) do { \
|
|
((zend_mm_block*)(block))->debug.filename = __zend_filename; \
|
|
((zend_mm_block*)(block))->debug.lineno = __zend_lineno; \
|
|
((zend_mm_block*)(block))->debug.orig_filename = __zend_orig_filename; \
|
|
((zend_mm_block*)(block))->debug.orig_lineno = __zend_orig_lineno; \
|
|
ZEND_MM_SET_BLOCK_SIZE(block, __size); \
|
|
if (set_valid) { \
|
|
ZEND_MM_SET_MAGIC(block, MEM_BLOCK_VALID); \
|
|
} \
|
|
if (set_thread) { \
|
|
ZEND_MM_SET_THREAD_ID(block); \
|
|
} \
|
|
} while (0)
|
|
|
|
#else
|
|
|
|
# define ZEND_MM_VALID_PTR(ptr) (ptr != NULL)
|
|
|
|
# define ZEND_MM_SET_MAGIC(block, val)
|
|
|
|
# define ZEND_MM_CHECK_MAGIC(block, val)
|
|
|
|
# define ZEND_MM_SET_DEBUG_INFO(block, __size, set_valid, set_thread) ZEND_MM_SET_BLOCK_SIZE(block, __size)
|
|
|
|
#endif
|
|
|
|
|
|
#if ZEND_MM_HEAP_PROTECTION
|
|
|
|
# define ZEND_MM_CHECK_PROTECTION(block) \
|
|
do { \
|
|
if ((block)->debug.start_magic != _mem_block_start_magic || \
|
|
memcmp(ZEND_MM_END_MAGIC_PTR(block), &_mem_block_end_magic, END_MAGIC_SIZE) != 0) { \
|
|
zend_mm_panic("zend_mm_heap corrupted"); \
|
|
} \
|
|
} while (0)
|
|
|
|
# define ZEND_MM_END_MAGIC_PTR(block) \
|
|
(unsigned int*)(((char*)(ZEND_MM_DATA_OF(block))) + ((zend_mm_block*)(block))->debug.size)
|
|
|
|
# define END_MAGIC_SIZE sizeof(unsigned int)
|
|
|
|
# define ZEND_MM_SET_BLOCK_SIZE(block, __size) do { \
|
|
unsigned int *p; \
|
|
((zend_mm_block*)(block))->debug.size = (__size); \
|
|
p = ZEND_MM_END_MAGIC_PTR(block); \
|
|
((zend_mm_block*)(block))->debug.start_magic = _mem_block_start_magic; \
|
|
memcpy(p, &_mem_block_end_magic, END_MAGIC_SIZE); \
|
|
} while (0)
|
|
|
|
static unsigned int _mem_block_start_magic = 0;
|
|
static unsigned int _mem_block_end_magic = 0;
|
|
|
|
#else
|
|
|
|
# if ZEND_DEBUG
|
|
# define ZEND_MM_SET_BLOCK_SIZE(block, _size) \
|
|
((zend_mm_block*)(block))->debug.size = (_size)
|
|
# else
|
|
# define ZEND_MM_SET_BLOCK_SIZE(block, _size)
|
|
# endif
|
|
|
|
# define ZEND_MM_CHECK_PROTECTION(block)
|
|
|
|
# define END_MAGIC_SIZE 0
|
|
|
|
#endif
|
|
|
|
#if ZEND_MM_SAFE_UNLINKING
|
|
# define ZEND_MM_CHECK_BLOCK_LINKAGE(block) \
|
|
if (UNEXPECTED((block)->info._size != ZEND_MM_NEXT_BLOCK(block)->info._prev) || \
|
|
UNEXPECTED(!UNEXPECTED(ZEND_MM_IS_FIRST_BLOCK(block)) && \
|
|
UNEXPECTED(ZEND_MM_PREV_BLOCK(block)->info._size != (block)->info._prev))) { \
|
|
zend_mm_panic("zend_mm_heap corrupted"); \
|
|
}
|
|
#else
|
|
# define ZEND_MM_CHECK_BLOCK_LINKAGE(block)
|
|
#endif
|
|
|
|
|
|
|
|
static inline void zend_mm_add_to_free_list(zend_mm_heap *heap, zend_mm_free_block *mm_block)
|
|
{
|
|
zend_mm_free_block *prev, *next;
|
|
size_t size;
|
|
|
|
ZEND_MM_SET_MAGIC(mm_block, MEM_BLOCK_FREED);
|
|
|
|
size = ZEND_MM_FREE_BLOCK_SIZE(mm_block);
|
|
if (ZEND_MM_SMALL_SIZE(size)) {
|
|
size_t index = ZEND_MM_BUCKET_INDEX(size);
|
|
prev = &heap->free_buckets[index];
|
|
|
|
if (prev->prev_free_block == prev) {
|
|
heap->free_bitmap |= (1U << index);
|
|
}
|
|
} else {
|
|
prev = &heap->free_buckets[0];
|
|
while (prev->next_free_block != &heap->free_buckets[0] &&
|
|
ZEND_MM_FREE_BLOCK_SIZE(prev->next_free_block) < size) {
|
|
prev = prev->next_free_block;
|
|
}
|
|
}
|
|
next = prev->next_free_block;
|
|
mm_block->prev_free_block = prev;
|
|
mm_block->next_free_block = next;
|
|
prev->next_free_block = mm_block;
|
|
next->prev_free_block = mm_block;
|
|
}
|
|
|
|
|
|
static inline void zend_mm_remove_from_free_list(zend_mm_heap *heap, zend_mm_free_block *mm_block)
|
|
{
|
|
zend_mm_free_block *prev, *next;
|
|
|
|
ZEND_MM_CHECK_MAGIC(mm_block, MEM_BLOCK_FREED);
|
|
|
|
prev = mm_block->prev_free_block;
|
|
next = mm_block->next_free_block;
|
|
|
|
#if ZEND_MM_SAFE_UNLINKING
|
|
if (UNEXPECTED(prev->next_free_block != mm_block) || UNEXPECTED(next->prev_free_block != mm_block)) {
|
|
zend_mm_panic("zend_mm_heap corrupted");
|
|
}
|
|
#endif
|
|
|
|
prev->next_free_block = next;
|
|
next->prev_free_block = prev;
|
|
|
|
if (prev == next) {
|
|
size_t size = ZEND_MM_FREE_BLOCK_SIZE(mm_block);
|
|
|
|
if (ZEND_MM_SMALL_SIZE(size)) {
|
|
size_t index = ZEND_MM_BUCKET_INDEX(size);
|
|
|
|
heap->free_bitmap &= ~(1U << index);
|
|
}
|
|
}
|
|
}
|
|
|
|
static inline void zend_mm_init(zend_mm_heap *heap)
|
|
{
|
|
int i;
|
|
|
|
heap->free_bitmap = 0;
|
|
#if ZEND_MM_CACHE
|
|
heap->cached = 0;
|
|
memset(heap->cache, 0, sizeof(heap->cache));
|
|
#endif
|
|
for (i = 0; i < ZEND_MM_NUM_BUCKETS; i++) {
|
|
heap->free_buckets[i].next_free_block =
|
|
heap->free_buckets[i].prev_free_block = &heap->free_buckets[i];
|
|
}
|
|
}
|
|
|
|
static void zend_mm_del_segment(zend_mm_heap *heap, zend_mm_segment *segment)
|
|
{
|
|
if (heap->segments_list == segment) {
|
|
heap->segments_list = segment->next_segment;
|
|
} else {
|
|
zend_mm_segment *p = heap->segments_list;
|
|
|
|
while (p) {
|
|
if (p->next_segment == segment) {
|
|
p->next_segment = segment->next_segment;
|
|
break;
|
|
}
|
|
p = p->next_segment;
|
|
}
|
|
}
|
|
heap->real_size -= segment->size;
|
|
ZEND_MM_STORAGE_FREE(segment);
|
|
}
|
|
|
|
#if ZEND_MM_CACHE
|
|
static void zend_mm_free_cache(zend_mm_heap *heap)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < ZEND_MM_NUM_BUCKETS; i++) {
|
|
if (heap->cache[i]) {
|
|
zend_mm_free_block *mm_block = heap->cache[i];
|
|
|
|
while (mm_block) {
|
|
size_t size = ZEND_MM_BLOCK_SIZE(mm_block);
|
|
zend_mm_free_block *q = mm_block->prev_free_block;
|
|
zend_mm_block *next_block = ZEND_MM_NEXT_BLOCK(mm_block);
|
|
|
|
heap->cached -= size;
|
|
|
|
if (ZEND_MM_PREV_BLOCK_IS_FREE(mm_block)) {
|
|
mm_block = (zend_mm_free_block*)ZEND_MM_PREV_BLOCK(mm_block);
|
|
size += ZEND_MM_FREE_BLOCK_SIZE(mm_block);
|
|
zend_mm_remove_from_free_list(heap, (zend_mm_free_block *) mm_block);
|
|
}
|
|
if (ZEND_MM_IS_FREE_BLOCK(next_block)) {
|
|
size += ZEND_MM_FREE_BLOCK_SIZE(next_block);
|
|
zend_mm_remove_from_free_list(heap, (zend_mm_free_block *) next_block);
|
|
}
|
|
ZEND_MM_BLOCK(mm_block, ZEND_MM_FREE_BLOCK, size);
|
|
|
|
if (ZEND_MM_IS_FIRST_BLOCK(mm_block) &&
|
|
ZEND_MM_IS_GUARD_BLOCK(ZEND_MM_NEXT_BLOCK(mm_block))) {
|
|
zend_mm_del_segment(heap, (zend_mm_segment *) ((char *)mm_block - ZEND_MM_ALIGNED_SEGMENT_SIZE));
|
|
} else {
|
|
zend_mm_add_to_free_list(heap, (zend_mm_free_block *) mm_block);
|
|
}
|
|
|
|
mm_block = q;
|
|
}
|
|
heap->cache[i] = NULL;
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
static void zend_mm_random(unsigned char *buf, size_t size)
|
|
{
|
|
size_t i = 0;
|
|
unsigned char t;
|
|
|
|
#ifdef ZEND_WIN32
|
|
HCRYPTPROV hCryptProv;
|
|
|
|
if (CryptAcquireContext(&hCryptProv, NULL, NULL, PROV_RSA_FULL, 0)) {
|
|
do {
|
|
BOOL ret = CryptGenRandom(hCryptProv, size, buf);
|
|
CryptReleaseContext(hCryptProv, 0);
|
|
if (ret) {
|
|
while (i < size && buf[i] != 0) {
|
|
i++;
|
|
}
|
|
if (i == size) {
|
|
return;
|
|
}
|
|
}
|
|
} while (0);
|
|
}
|
|
#elif defined(HAVE_DEV_URANDOM)
|
|
int fd = open("/dev/urandom", 0);
|
|
|
|
if (fd >= 0) {
|
|
if (read(fd, buf, size) == size) {
|
|
while (i < size && buf[i] != 0) {
|
|
i++;
|
|
}
|
|
if (i == size) {
|
|
close(fd);
|
|
return;
|
|
}
|
|
}
|
|
close(fd);
|
|
}
|
|
#endif
|
|
t = (unsigned char)getpid();
|
|
while (i < size) {
|
|
do {
|
|
buf[i] = ((unsigned char)rand()) ^ t;
|
|
} while (buf[i] == 0);
|
|
t = buf[i++] << 1;
|
|
}
|
|
}
|
|
|
|
/* Notes:
|
|
* - This function may alter the block_sizes values to match platform alignment
|
|
* - This function does *not* perform sanity checks on the arguments
|
|
*/
|
|
ZEND_API zend_mm_heap *zend_mm_startup_ex(const zend_mm_mem_handlers *handlers, size_t block_size, void *params)
|
|
{
|
|
zend_mm_storage *storage;
|
|
zend_mm_heap *heap;
|
|
|
|
#if 0
|
|
int i;
|
|
|
|
printf("ZEND_MM_ALIGNMENT=%d\n", ZEND_MM_ALIGNMENT);
|
|
printf("ZEND_MM_ALIGNMENT_LOG2=%d\n", ZEND_MM_ALIGNMENT_LOG2);
|
|
printf("ZEND_MM_MIN_SIZE=%d\n", ZEND_MM_MIN_SIZE);
|
|
printf("ZEND_MM_MAX_SMALL_SIZE=%d\n", ZEND_MM_MAX_SMALL_SIZE);
|
|
printf("ZEND_MM_ALIGNED_HEADER_SIZE=%d\n", ZEND_MM_ALIGNED_HEADER_SIZE);
|
|
printf("ZEND_MM_ALIGNED_FREE_HEADER_SIZE=%d\n", ZEND_MM_ALIGNED_FREE_HEADER_SIZE);
|
|
printf("ZEND_MM_MIN_ALLOC_BLOCK_SIZE=%d\n", ZEND_MM_MIN_ALLOC_BLOCK_SIZE);
|
|
printf("ZEND_MM_ALIGNED_MIN_HEADER_SIZE=%d\n", ZEND_MM_ALIGNED_MIN_HEADER_SIZE);
|
|
printf("ZEND_MM_ALIGNED_SEGMENT_SIZE=%d\n", ZEND_MM_ALIGNED_SEGMENT_SIZE);
|
|
for (i = 0; i < ZEND_MM_MAX_SMALL_SIZE; i++) {
|
|
printf("%3d%c: %3ld %d %2ld\n", i, (i == ZEND_MM_MIN_SIZE?'*':' '), (long)ZEND_MM_TRUE_SIZE(i), ZEND_MM_SMALL_SIZE(ZEND_MM_TRUE_SIZE(i)), (long)ZEND_MM_BUCKET_INDEX(ZEND_MM_TRUE_SIZE(i)));
|
|
}
|
|
exit(0);
|
|
#endif
|
|
|
|
#if ZEND_MM_HEAP_PROTECTION
|
|
if (_mem_block_start_magic == 0) {
|
|
zend_mm_random((unsigned char*)&_mem_block_start_magic, sizeof(_mem_block_start_magic));
|
|
}
|
|
if (_mem_block_end_magic == 0) {
|
|
zend_mm_random((unsigned char*)&_mem_block_end_magic, sizeof(_mem_block_end_magic));
|
|
}
|
|
#endif
|
|
#if ZEND_MM_COOKIES
|
|
if (_zend_mm_cookie == 0) {
|
|
zend_mm_random((unsigned char*)&_zend_mm_cookie, sizeof(_zend_mm_cookie));
|
|
}
|
|
#endif
|
|
|
|
storage = handlers->init(params);
|
|
if (!storage) {
|
|
fprintf(stderr, "Cannot initialize zend_mm storage [%s]\n", handlers->name);
|
|
exit(255);
|
|
}
|
|
storage->handlers = handlers;
|
|
|
|
heap = malloc(sizeof(struct _zend_mm_heap));
|
|
|
|
heap->storage = storage;
|
|
heap->block_size = block_size = ZEND_MM_ALIGNED_SIZE(block_size);
|
|
heap->segments_list = NULL;
|
|
zend_mm_init(heap);
|
|
|
|
heap->use_zend_alloc = 1;
|
|
heap->real_size = 0;
|
|
heap->overflow = 0;
|
|
heap->real_peak = 0;
|
|
heap->limit = 1<<30;
|
|
heap->size = 0;
|
|
heap->peak = 0;
|
|
heap->reserve = NULL;
|
|
heap->reserve = zend_mm_alloc(heap, ZEND_MM_RESERVE_SIZE);
|
|
|
|
return heap;
|
|
}
|
|
|
|
ZEND_API zend_mm_heap *zend_mm_startup(void)
|
|
{
|
|
int i;
|
|
size_t seg_size;
|
|
char *mem_type = getenv("ZEND_MM_MEM_TYPE");
|
|
char *tmp;
|
|
const zend_mm_mem_handlers *handlers;
|
|
|
|
if (mem_type == NULL) {
|
|
i = 0;
|
|
} else {
|
|
for (i = 0; mem_handlers[i].name; i++) {
|
|
if (strcmp(mem_handlers[i].name, mem_type) == 0) {
|
|
break;
|
|
}
|
|
}
|
|
if (!mem_handlers[i].name) {
|
|
fprintf(stderr, "Wrong or unsupported zend_mm storage type '%s'\n", mem_type);
|
|
fprintf(stderr, " supported types:\n");
|
|
for (i = 0; mem_handlers[i].name; i++) {
|
|
fprintf(stderr, " '%s'\n", mem_handlers[i].name);
|
|
}
|
|
exit(255);
|
|
}
|
|
}
|
|
handlers = &mem_handlers[i];
|
|
|
|
tmp = getenv("ZEND_MM_SEG_SIZE");
|
|
if (tmp) {
|
|
seg_size = zend_atoi(tmp, 0);
|
|
} else {
|
|
seg_size = 256 * 1024;
|
|
}
|
|
|
|
return zend_mm_startup_ex(handlers, seg_size, NULL);
|
|
}
|
|
|
|
#if ZEND_DEBUG
|
|
static long zend_mm_find_leaks(zend_mm_segment *segment, zend_mm_block *b)
|
|
{
|
|
long leaks = 0;
|
|
zend_mm_block *p, *q;
|
|
|
|
p = ZEND_MM_NEXT_BLOCK(b);
|
|
while (1) {
|
|
if (ZEND_MM_IS_GUARD_BLOCK(p)) {
|
|
ZEND_MM_CHECK_MAGIC(p, MEM_BLOCK_GUARD);
|
|
segment = segment->next_segment;
|
|
if (!segment) {
|
|
break;
|
|
}
|
|
p = (zend_mm_block *) ((char *) segment + ZEND_MM_ALIGNED_SEGMENT_SIZE);
|
|
continue;
|
|
}
|
|
q = ZEND_MM_NEXT_BLOCK(p);
|
|
if (q <= p ||
|
|
(char*)q > (char*)segment + segment->size ||
|
|
p->info._size != q->info._prev) {
|
|
zend_mm_panic("zend_mm_heap corrupted");
|
|
}
|
|
if (!ZEND_MM_IS_FREE_BLOCK(p)) {
|
|
if (p->magic == MEM_BLOCK_VALID) {
|
|
if (p->debug.filename==b->debug.filename && p->debug.lineno==b->debug.lineno) {
|
|
ZEND_MM_SET_MAGIC(p, MEM_BLOCK_LEAK);
|
|
leaks++;
|
|
}
|
|
#if ZEND_MM_CACHE
|
|
} else if (p->magic == MEM_BLOCK_CACHED) {
|
|
/* skip it */
|
|
#endif
|
|
} else if (p->magic != MEM_BLOCK_LEAK) {
|
|
zend_mm_panic("zend_mm_heap corrupted");
|
|
}
|
|
}
|
|
p = q;
|
|
}
|
|
return leaks;
|
|
}
|
|
|
|
static void zend_mm_check_leaks(zend_mm_heap *heap)
|
|
{
|
|
zend_mm_segment *segment = heap->segments_list;
|
|
zend_mm_block *p, *q;
|
|
zend_uint total = 0;
|
|
|
|
if (!segment) {
|
|
return;
|
|
}
|
|
p = (zend_mm_block *) ((char *) segment + ZEND_MM_ALIGNED_SEGMENT_SIZE);
|
|
while (1) {
|
|
q = ZEND_MM_NEXT_BLOCK(p);
|
|
if (q <= p ||
|
|
(char*)q > (char*)segment + segment->size ||
|
|
p->info._size != q->info._prev) {
|
|
zend_mm_panic("zend_mm_heap corrupted");
|
|
}
|
|
if (!ZEND_MM_IS_FREE_BLOCK(p)) {
|
|
if (p->magic == MEM_BLOCK_VALID) {
|
|
long repeated;
|
|
zend_leak_info leak;
|
|
|
|
ZEND_MM_SET_MAGIC(p, MEM_BLOCK_LEAK);
|
|
|
|
leak.addr = ZEND_MM_DATA_OF(p);
|
|
leak.size = p->debug.size;
|
|
leak.filename = p->debug.filename;
|
|
leak.lineno = p->debug.lineno;
|
|
leak.orig_filename = p->debug.orig_filename;
|
|
leak.orig_lineno = p->debug.orig_lineno;
|
|
|
|
zend_message_dispatcher(ZMSG_LOG_SCRIPT_NAME, NULL);
|
|
zend_message_dispatcher(ZMSG_MEMORY_LEAK_DETECTED, &leak);
|
|
repeated = zend_mm_find_leaks(segment, p);
|
|
total += 1 + repeated;
|
|
if (repeated) {
|
|
zend_message_dispatcher(ZMSG_MEMORY_LEAK_REPEATED, (void *)repeated);
|
|
}
|
|
#if ZEND_MM_CACHE
|
|
} else if (p->magic == MEM_BLOCK_CACHED) {
|
|
/* skip it */
|
|
#endif
|
|
} else if (p->magic != MEM_BLOCK_LEAK) {
|
|
zend_mm_panic("zend_mm_heap corrupted");
|
|
}
|
|
}
|
|
if (ZEND_MM_IS_GUARD_BLOCK(q)) {
|
|
segment = segment->next_segment;
|
|
if (!segment) {
|
|
break;
|
|
}
|
|
q = (zend_mm_block *) ((char *) segment + ZEND_MM_ALIGNED_SEGMENT_SIZE);
|
|
}
|
|
p = q;
|
|
}
|
|
if (total) {
|
|
zend_message_dispatcher(ZMSG_MEMORY_LEAKS_GRAND_TOTAL, &total);
|
|
}
|
|
}
|
|
|
|
static int zend_mm_check_ptr(zend_mm_heap *heap, void *ptr, int silent ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
{
|
|
zend_mm_block *p;
|
|
int no_cache_notice = 0;
|
|
int had_problems = 0;
|
|
int valid_beginning = 1;
|
|
|
|
if (silent==2) {
|
|
silent = 1;
|
|
no_cache_notice = 1;
|
|
} else if (silent==3) {
|
|
silent = 0;
|
|
no_cache_notice = 1;
|
|
}
|
|
if (!silent) {
|
|
zend_message_dispatcher(ZMSG_LOG_SCRIPT_NAME, NULL);
|
|
zend_debug_alloc_output("---------------------------------------\n");
|
|
zend_debug_alloc_output("%s(%d) : Block 0x%0.8lX status:\n" ZEND_FILE_LINE_RELAY_CC, (long) ptr);
|
|
if (__zend_orig_filename) {
|
|
zend_debug_alloc_output("%s(%d) : Actual location (location was relayed)\n" ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
}
|
|
if (!ptr) {
|
|
zend_debug_alloc_output("NULL\n");
|
|
zend_debug_alloc_output("---------------------------------------\n");
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
if (!ptr) {
|
|
if (silent) {
|
|
return zend_mm_check_ptr(heap, ptr, 0 ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
}
|
|
}
|
|
|
|
p = ZEND_MM_HEADER_OF(ptr);
|
|
|
|
#ifdef ZTS
|
|
if (ZEND_MM_BAD_THREAD_ID(p)) {
|
|
if (!silent) {
|
|
zend_debug_alloc_output("Invalid pointer: ((thread_id=0x%0.8X) != (expected=0x%0.8X))\n", (long)p->thread_id, (long)tsrm_thread_id());
|
|
had_problems = 1;
|
|
} else {
|
|
return zend_mm_check_ptr(heap, ptr, 0 ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
if (p->info._size != ZEND_MM_NEXT_BLOCK(p)->info._prev) {
|
|
if (!silent) {
|
|
zend_debug_alloc_output("Invalid pointer: ((size=0x%0.8X) != (next.prev=0x%0.8X))\n", p->info._size, ZEND_MM_NEXT_BLOCK(p)->info._prev);
|
|
had_problems = 1;
|
|
} else {
|
|
return zend_mm_check_ptr(heap, ptr, 0 ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
}
|
|
}
|
|
if (p->info._prev != ZEND_MM_GUARD_BLOCK &&
|
|
ZEND_MM_PREV_BLOCK(p)->info._size != p->info._prev) {
|
|
if (!silent) {
|
|
zend_debug_alloc_output("Invalid pointer: ((prev=0x%0.8X) != (prev.size=0x%0.8X))\n", p->info._prev, ZEND_MM_PREV_BLOCK(p)->info._size);
|
|
had_problems = 1;
|
|
} else {
|
|
return zend_mm_check_ptr(heap, ptr, 0 ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
}
|
|
}
|
|
|
|
if (had_problems) {
|
|
zend_debug_alloc_output("---------------------------------------\n");
|
|
return 0;
|
|
}
|
|
|
|
if (!silent) {
|
|
zend_debug_alloc_output("%10s\t","Beginning: ");
|
|
}
|
|
|
|
if (!ZEND_MM_IS_USED_BLOCK(p)) {
|
|
if (!silent) {
|
|
if (p->magic != MEM_BLOCK_FREED) {
|
|
zend_debug_alloc_output("Freed (magic=0x%0.8X, expected=0x%0.8X)\n", p->magic, MEM_BLOCK_FREED);
|
|
} else {
|
|
zend_debug_alloc_output("Freed\n");
|
|
}
|
|
had_problems = 1;
|
|
} else {
|
|
return zend_mm_check_ptr(heap, ptr, 0 ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
}
|
|
} else if (ZEND_MM_IS_GUARD_BLOCK(p)) {
|
|
if (!silent) {
|
|
if (p->magic != MEM_BLOCK_FREED) {
|
|
zend_debug_alloc_output("Guard (magic=0x%0.8X, expected=0x%0.8X)\n", p->magic, MEM_BLOCK_FREED);
|
|
} else {
|
|
zend_debug_alloc_output("Guard\n");
|
|
}
|
|
had_problems = 1;
|
|
} else {
|
|
return zend_mm_check_ptr(heap, ptr, 0 ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
}
|
|
} else {
|
|
switch (p->magic) {
|
|
case MEM_BLOCK_VALID:
|
|
case MEM_BLOCK_LEAK:
|
|
if (!silent) {
|
|
zend_debug_alloc_output("OK (allocated on %s:%d, %d bytes)\n", p->debug.filename, p->debug.lineno, (int)p->debug.size);
|
|
}
|
|
break; /* ok */
|
|
case MEM_BLOCK_CACHED:
|
|
if (!no_cache_notice) {
|
|
if (!silent) {
|
|
zend_debug_alloc_output("Cached\n");
|
|
had_problems = 1;
|
|
} else {
|
|
return zend_mm_check_ptr(heap, ptr, 0 ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
}
|
|
}
|
|
case MEM_BLOCK_FREED:
|
|
if (!silent) {
|
|
zend_debug_alloc_output("Freed (invalid)\n");
|
|
had_problems = 1;
|
|
} else {
|
|
return zend_mm_check_ptr(heap, ptr, 0 ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
}
|
|
break;
|
|
case MEM_BLOCK_GUARD:
|
|
if (!silent) {
|
|
zend_debug_alloc_output("Guard (invalid)\n");
|
|
had_problems = 1;
|
|
} else {
|
|
return zend_mm_check_ptr(heap, ptr, 0 ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
}
|
|
break;
|
|
default:
|
|
if (!silent) {
|
|
zend_debug_alloc_output("Unknown (magic=0x%0.8X, expected=0x%0.8X)\n", p->magic, MEM_BLOCK_VALID);
|
|
had_problems = 1;
|
|
valid_beginning = 0;
|
|
} else {
|
|
return zend_mm_check_ptr(heap, ptr, 0 ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
#if ZEND_MM_HEAP_PROTECTION
|
|
if (!valid_beginning) {
|
|
if (!silent) {
|
|
zend_debug_alloc_output("%10s\t", "Start:");
|
|
zend_debug_alloc_output("Unknown\n");
|
|
zend_debug_alloc_output("%10s\t", "End:");
|
|
zend_debug_alloc_output("Unknown\n");
|
|
}
|
|
} else {
|
|
unsigned int *end_magic = ZEND_MM_END_MAGIC_PTR(p);
|
|
|
|
if (p->debug.start_magic == _mem_block_start_magic) {
|
|
if (!silent) {
|
|
zend_debug_alloc_output("%10s\t", "Start:");
|
|
zend_debug_alloc_output("OK\n");
|
|
}
|
|
} else {
|
|
char *overflow_ptr, *magic_ptr=(char *) &_mem_block_start_magic;
|
|
int overflows=0;
|
|
int i;
|
|
|
|
if (silent) {
|
|
return _mem_block_check(ptr, 0 ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
}
|
|
had_problems = 1;
|
|
overflow_ptr = (char *) &p->debug.start_magic;
|
|
i = END_MAGIC_SIZE;
|
|
while (--i >= 0) {
|
|
if (overflow_ptr[i]!=magic_ptr[i]) {
|
|
overflows++;
|
|
}
|
|
}
|
|
zend_debug_alloc_output("%10s\t", "Start:");
|
|
zend_debug_alloc_output("Overflown (magic=0x%0.8X instead of 0x%0.8X)\n", p->debug.start_magic, _mem_block_start_magic);
|
|
zend_debug_alloc_output("%10s\t","");
|
|
if (overflows >= END_MAGIC_SIZE) {
|
|
zend_debug_alloc_output("At least %d bytes overflown\n", END_MAGIC_SIZE);
|
|
} else {
|
|
zend_debug_alloc_output("%d byte(s) overflown\n", overflows);
|
|
}
|
|
}
|
|
if (memcmp(end_magic, &_mem_block_end_magic, END_MAGIC_SIZE)==0) {
|
|
if (!silent) {
|
|
zend_debug_alloc_output("%10s\t", "End:");
|
|
zend_debug_alloc_output("OK\n");
|
|
}
|
|
} else {
|
|
char *overflow_ptr, *magic_ptr=(char *) &_mem_block_end_magic;
|
|
int overflows=0;
|
|
int i;
|
|
|
|
if (silent) {
|
|
return _mem_block_check(ptr, 0 ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
}
|
|
had_problems = 1;
|
|
overflow_ptr = (char *) end_magic;
|
|
|
|
for (i=0; i < END_MAGIC_SIZE; i++) {
|
|
if (overflow_ptr[i]!=magic_ptr[i]) {
|
|
overflows++;
|
|
}
|
|
}
|
|
|
|
zend_debug_alloc_output("%10s\t", "End:");
|
|
zend_debug_alloc_output("Overflown (magic=0x%0.8X instead of 0x%0.8X)\n", *end_magic, _mem_block_end_magic);
|
|
zend_debug_alloc_output("%10s\t","");
|
|
if (overflows >= END_MAGIC_SIZE) {
|
|
zend_debug_alloc_output("At least %d bytes overflown\n", END_MAGIC_SIZE);
|
|
} else {
|
|
zend_debug_alloc_output("%d byte(s) overflown\n", overflows);
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
if (!silent) {
|
|
zend_debug_alloc_output("---------------------------------------\n");
|
|
}
|
|
return ((!had_problems) ? 1 : 0);
|
|
}
|
|
|
|
static int zend_mm_check_heap(zend_mm_heap *heap, int silent ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
{
|
|
zend_mm_segment *segment = heap->segments_list;
|
|
zend_mm_block *p, *q;
|
|
int errors = 0;
|
|
|
|
if (!segment) {
|
|
return 0;
|
|
}
|
|
p = (zend_mm_block *) ((char *) segment + ZEND_MM_ALIGNED_SEGMENT_SIZE);
|
|
while (1) {
|
|
q = ZEND_MM_NEXT_BLOCK(p);
|
|
if (q <= p ||
|
|
(char*)q > (char*)segment + segment->size ||
|
|
p->info._size != q->info._prev) {
|
|
zend_mm_panic("zend_mm_heap corrupted");
|
|
}
|
|
if (!ZEND_MM_IS_FREE_BLOCK(p)) {
|
|
if (p->magic == MEM_BLOCK_VALID || p->magic == MEM_BLOCK_LEAK) {
|
|
if (!zend_mm_check_ptr(heap, ZEND_MM_DATA_OF(p), (silent?2:3) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC)) {
|
|
errors++;
|
|
}
|
|
#if ZEND_MM_CACHE
|
|
} else if (p->magic == MEM_BLOCK_CACHED) {
|
|
/* skip it */
|
|
#endif
|
|
} else if (p->magic != MEM_BLOCK_LEAK) {
|
|
zend_mm_panic("zend_mm_heap corrupted");
|
|
}
|
|
}
|
|
if (ZEND_MM_IS_GUARD_BLOCK(q)) {
|
|
segment = segment->next_segment;
|
|
if (!segment) {
|
|
return errors;
|
|
}
|
|
q = (zend_mm_block *) ((char *) segment + ZEND_MM_ALIGNED_SEGMENT_SIZE);
|
|
}
|
|
p = q;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
ZEND_API void zend_mm_shutdown(zend_mm_heap *heap, int full_shutdown, int silent)
|
|
{
|
|
zend_mm_segment *segment;
|
|
zend_mm_segment *prev;
|
|
|
|
if (heap->reserve) {
|
|
zend_mm_free(heap, heap->reserve);
|
|
heap->reserve = NULL;
|
|
}
|
|
|
|
#if ZEND_DEBUG
|
|
if (!silent) {
|
|
zend_mm_check_leaks(heap);
|
|
}
|
|
#endif
|
|
|
|
segment = heap->segments_list;
|
|
while (segment) {
|
|
prev = segment;
|
|
segment = segment->next_segment;
|
|
ZEND_MM_STORAGE_FREE(prev);
|
|
}
|
|
if (full_shutdown) {
|
|
ZEND_MM_STORAGE_DTOR();
|
|
free(heap);
|
|
} else {
|
|
heap->segments_list = NULL;
|
|
zend_mm_init(heap);
|
|
heap->real_size = 0;
|
|
heap->real_peak = 0;
|
|
heap->size = 0;
|
|
heap->peak = 0;
|
|
heap->reserve = zend_mm_alloc(heap, ZEND_MM_RESERVE_SIZE);
|
|
heap->overflow = 0;
|
|
}
|
|
}
|
|
|
|
static void zend_mm_safe_error(zend_mm_heap *heap,
|
|
const char *format,
|
|
size_t limit,
|
|
#if ZEND_DEBUG
|
|
const char *filename,
|
|
uint lineno,
|
|
#endif
|
|
size_t size)
|
|
{
|
|
if (heap->reserve) {
|
|
zend_mm_free(heap, heap->reserve);
|
|
heap->reserve = NULL;
|
|
}
|
|
if (heap->overflow == 0) {
|
|
char *error_filename;
|
|
uint error_lineno;
|
|
TSRMLS_FETCH();
|
|
if (zend_is_compiling(TSRMLS_C)) {
|
|
error_filename = zend_get_compiled_filename(TSRMLS_C);
|
|
error_lineno = zend_get_compiled_lineno(TSRMLS_C);
|
|
} else if (EG(in_execution)) {
|
|
error_filename = EG(active_op_array)?EG(active_op_array)->filename:NULL;
|
|
error_lineno = EG(opline_ptr)?(*EG(opline_ptr))->lineno:0;
|
|
} else {
|
|
error_filename = NULL;
|
|
error_lineno = 0;
|
|
}
|
|
if (!error_filename) {
|
|
error_filename = "Unknown";
|
|
}
|
|
heap->overflow = 1;
|
|
zend_try {
|
|
zend_error(E_ERROR,
|
|
format,
|
|
limit,
|
|
#if ZEND_DEBUG
|
|
filename,
|
|
lineno,
|
|
#endif
|
|
size);
|
|
} zend_catch {
|
|
if (heap->overflow == 2) {
|
|
fprintf(stderr, "\nFatal error: ");
|
|
fprintf(stderr,
|
|
format,
|
|
limit,
|
|
#if ZEND_DEBUG
|
|
filename,
|
|
lineno,
|
|
#endif
|
|
size);
|
|
fprintf(stderr, " in %s on line %d\n", error_filename, error_lineno);
|
|
}
|
|
} zend_end_try();
|
|
} else {
|
|
heap->overflow = 2;
|
|
}
|
|
zend_bailout();
|
|
}
|
|
|
|
static void *_zend_mm_alloc_int(zend_mm_heap *heap, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC) ZEND_ATTRIBUTE_MALLOC;
|
|
|
|
static void *_zend_mm_alloc_int(zend_mm_heap *heap, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
{
|
|
zend_mm_free_block *p, *end, *best_fit = NULL;
|
|
size_t true_size = ZEND_MM_TRUE_SIZE(size);
|
|
|
|
if (true_size < size) {
|
|
goto out_of_memory;
|
|
}
|
|
if (ZEND_MM_SMALL_SIZE(true_size)) {
|
|
size_t index = ZEND_MM_BUCKET_INDEX(true_size);
|
|
unsigned int bitmap;
|
|
|
|
#if ZEND_MM_CACHE
|
|
if (heap->cache[index]) {
|
|
/* Get block from cache */
|
|
best_fit = heap->cache[index];
|
|
heap->cache[index] = best_fit->prev_free_block;
|
|
heap->cached -= true_size;
|
|
ZEND_MM_CHECK_MAGIC(best_fit, MEM_BLOCK_CACHED);
|
|
ZEND_MM_SET_DEBUG_INFO(best_fit, size, 1, 0);
|
|
return ZEND_MM_DATA_OF(best_fit);
|
|
}
|
|
#endif
|
|
|
|
bitmap = heap->free_bitmap >> index;
|
|
if (bitmap) {
|
|
/* Found some "small" free block that can be used */
|
|
if (bitmap & 1) {
|
|
/* Found "small" free block of exactly the same size */
|
|
best_fit = heap->free_buckets[index].next_free_block;
|
|
goto zend_mm_finished_searching_for_block;
|
|
} else {
|
|
/* Search for bigger "small" block */
|
|
static const int offset[16] = {4,0,1,0,2,0,1,0,3,0,1,0,2,0,1,0};
|
|
int n;
|
|
|
|
/* Unrolled loop that search for best "small" block */
|
|
do {
|
|
n = offset[bitmap & 15];
|
|
bitmap >>= 4;
|
|
index += n;
|
|
} while (n == 4);
|
|
|
|
best_fit = heap->free_buckets[index].next_free_block;
|
|
goto zend_mm_finished_searching_for_block;
|
|
}
|
|
}
|
|
}
|
|
|
|
end = &heap->free_buckets[0];
|
|
for (p = end->next_free_block; p != end; p = p->next_free_block) {
|
|
if (ZEND_MM_FREE_BLOCK_SIZE(p) >= true_size) {
|
|
if (ZEND_MM_IS_FIRST_BLOCK(p) ||
|
|
!ZEND_MM_IS_FIRST_BLOCK(ZEND_MM_PREV_BLOCK(p)) ||
|
|
!ZEND_MM_IS_GUARD_BLOCK(ZEND_MM_NEXT_BLOCK(p)) ||
|
|
p->next_free_block == end) {
|
|
best_fit = p;
|
|
goto zend_mm_finished_searching_for_block;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (best_fit) {
|
|
zend_mm_finished_searching_for_block:
|
|
/* remove from free list */
|
|
HANDLE_BLOCK_INTERRUPTIONS();
|
|
#if ZEND_DEBUG
|
|
ZEND_MM_CHECK_MAGIC(best_fit, MEM_BLOCK_FREED);
|
|
#endif
|
|
ZEND_MM_CHECK_COOKIE(best_fit);
|
|
ZEND_MM_CHECK_BLOCK_LINKAGE(best_fit);
|
|
zend_mm_remove_from_free_list(heap, best_fit);
|
|
|
|
{
|
|
size_t block_size = ZEND_MM_FREE_BLOCK_SIZE(best_fit);
|
|
size_t remaining_size = block_size - true_size;
|
|
|
|
if (remaining_size < ZEND_MM_ALIGNED_MIN_HEADER_SIZE) {
|
|
true_size = block_size;
|
|
ZEND_MM_BLOCK(best_fit, ZEND_MM_USED_BLOCK, true_size);
|
|
} else {
|
|
zend_mm_free_block *new_free_block;
|
|
|
|
/* prepare new free block */
|
|
ZEND_MM_BLOCK(best_fit, ZEND_MM_USED_BLOCK, true_size);
|
|
new_free_block = (zend_mm_free_block *) ZEND_MM_BLOCK_AT(best_fit, true_size);
|
|
ZEND_MM_BLOCK(new_free_block, ZEND_MM_FREE_BLOCK, remaining_size);
|
|
|
|
/* add the new free block to the free list */
|
|
zend_mm_add_to_free_list(heap, new_free_block);
|
|
}
|
|
}
|
|
} else {
|
|
size_t segment_size;
|
|
size_t block_size;
|
|
size_t remaining_size;
|
|
zend_mm_segment *segment;
|
|
|
|
if (true_size > heap->block_size - (ZEND_MM_ALIGNED_SEGMENT_SIZE + ZEND_MM_ALIGNED_HEADER_SIZE)) {
|
|
/* Make sure we add a memory block which is big enough,
|
|
segment must have header "size" and trailer "guard" block */
|
|
segment_size = true_size + ZEND_MM_ALIGNED_SEGMENT_SIZE + ZEND_MM_ALIGNED_HEADER_SIZE;
|
|
segment_size = ((segment_size + (heap->block_size-1)) / heap->block_size) * heap->block_size;
|
|
} else {
|
|
segment_size = heap->block_size;
|
|
}
|
|
|
|
HANDLE_BLOCK_INTERRUPTIONS();
|
|
|
|
if (segment_size < true_size ||
|
|
heap->real_size + segment_size > heap->limit) {
|
|
/* Memory limit overflow */
|
|
#if ZEND_MM_CACHE
|
|
zend_mm_free_cache(heap);
|
|
#endif
|
|
HANDLE_UNBLOCK_INTERRUPTIONS();
|
|
#if ZEND_DEBUG
|
|
zend_mm_safe_error(heap, "Allowed memory size of %d bytes exhausted at %s:%d (tried to allocate %d bytes)", heap->limit, __zend_filename, __zend_lineno, size);
|
|
#else
|
|
zend_mm_safe_error(heap, "Allowed memory size of %d bytes exhausted (tried to allocate %d bytes)", heap->limit, size);
|
|
#endif
|
|
}
|
|
|
|
segment = (zend_mm_segment *) ZEND_MM_STORAGE_ALLOC(segment_size);
|
|
|
|
if (!segment) {
|
|
/* Storage manager cannot allocate memory */
|
|
#if ZEND_MM_CACHE
|
|
zend_mm_free_cache(heap);
|
|
#endif
|
|
HANDLE_UNBLOCK_INTERRUPTIONS();
|
|
out_of_memory:
|
|
#if ZEND_DEBUG
|
|
zend_mm_safe_error(heap, "Out of memory (allocated %d) at %s:%d (tried to allocate %d bytes)", heap->real_size, __zend_filename, __zend_lineno, size);
|
|
#else
|
|
zend_mm_safe_error(heap, "Out of memory (allocated %d) (tried to allocate %d bytes)", heap->real_size, size);
|
|
#endif
|
|
return NULL;
|
|
}
|
|
|
|
heap->real_size += segment_size;
|
|
if (heap->real_size > heap->real_peak) {
|
|
heap->real_peak = heap->real_size;
|
|
}
|
|
|
|
segment->size = segment_size;
|
|
segment->next_segment = heap->segments_list;
|
|
heap->segments_list = segment;
|
|
|
|
best_fit = (zend_mm_free_block *) ((char *) segment + ZEND_MM_ALIGNED_SEGMENT_SIZE);
|
|
ZEND_MM_MARK_FIRST_BLOCK(best_fit);
|
|
|
|
block_size = segment_size - ZEND_MM_ALIGNED_SEGMENT_SIZE - ZEND_MM_ALIGNED_HEADER_SIZE;
|
|
remaining_size = block_size - true_size;
|
|
|
|
ZEND_MM_LAST_BLOCK(ZEND_MM_BLOCK_AT(best_fit, block_size));
|
|
|
|
if (remaining_size < ZEND_MM_ALIGNED_MIN_HEADER_SIZE) {
|
|
true_size = block_size;
|
|
ZEND_MM_BLOCK(best_fit, ZEND_MM_USED_BLOCK, true_size);
|
|
} else {
|
|
zend_mm_free_block *new_free_block;
|
|
|
|
/* prepare new free block */
|
|
ZEND_MM_BLOCK(best_fit, ZEND_MM_USED_BLOCK, true_size);
|
|
new_free_block = (zend_mm_free_block *) ZEND_MM_BLOCK_AT(best_fit, true_size);
|
|
ZEND_MM_BLOCK(new_free_block, ZEND_MM_FREE_BLOCK, remaining_size);
|
|
|
|
/* add the new free block to the free list */
|
|
zend_mm_add_to_free_list(heap, new_free_block);
|
|
}
|
|
}
|
|
|
|
ZEND_MM_SET_DEBUG_INFO(best_fit, size, 1, 1);
|
|
|
|
heap->size += true_size;
|
|
if (heap->peak < heap->size) {
|
|
heap->peak = heap->size;
|
|
}
|
|
|
|
HANDLE_UNBLOCK_INTERRUPTIONS();
|
|
|
|
return ZEND_MM_DATA_OF(best_fit);
|
|
}
|
|
|
|
|
|
static void _zend_mm_free_int(zend_mm_heap *heap, void *p ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
{
|
|
zend_mm_block *mm_block;
|
|
zend_mm_block *prev_block, *next_block;
|
|
size_t size;
|
|
|
|
if (!ZEND_MM_VALID_PTR(p)) {
|
|
return;
|
|
}
|
|
mm_block = ZEND_MM_HEADER_OF(p);
|
|
size = ZEND_MM_BLOCK_SIZE(mm_block);
|
|
ZEND_MM_CHECK_PROTECTION(mm_block);
|
|
|
|
#if ZEND_DEBUG || ZEND_MM_HEAP_PROTECTION
|
|
memset(ZEND_MM_DATA_OF(mm_block), 0x5a, mm_block->debug.size);
|
|
#endif
|
|
|
|
#if ZEND_MM_CACHE
|
|
if (ZEND_MM_SMALL_SIZE(size) && heap->cached < ZEND_MM_CACHE_SIZE) {
|
|
size_t index = ZEND_MM_BUCKET_INDEX(size);
|
|
zend_mm_free_block **cache = &heap->cache[index];
|
|
|
|
((zend_mm_free_block*)mm_block)->prev_free_block = *cache;
|
|
*cache = (zend_mm_free_block*)mm_block;
|
|
heap->cached += size;
|
|
ZEND_MM_SET_MAGIC(mm_block, MEM_BLOCK_CACHED);
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
HANDLE_BLOCK_INTERRUPTIONS();
|
|
|
|
heap->size -= size;
|
|
|
|
if (ZEND_MM_PREV_BLOCK_IS_FREE(mm_block)) {
|
|
next_block = ZEND_MM_NEXT_BLOCK(mm_block);
|
|
if (ZEND_MM_IS_FREE_BLOCK(next_block)) {
|
|
/* merge with previous and next block */
|
|
zend_mm_remove_from_free_list(heap, (zend_mm_free_block *) next_block);
|
|
prev_block=ZEND_MM_PREV_BLOCK(mm_block);
|
|
if (ZEND_MM_SMALL_SIZE(ZEND_MM_FREE_BLOCK_SIZE(prev_block))) {
|
|
zend_mm_remove_from_free_list(heap, (zend_mm_free_block *) prev_block);
|
|
size += ZEND_MM_FREE_BLOCK_SIZE(prev_block) + ZEND_MM_FREE_BLOCK_SIZE(next_block);
|
|
mm_block = prev_block;
|
|
} else {
|
|
ZEND_MM_BLOCK(prev_block, ZEND_MM_FREE_BLOCK, size + ZEND_MM_FREE_BLOCK_SIZE(prev_block) + ZEND_MM_FREE_BLOCK_SIZE(next_block));
|
|
if (ZEND_MM_IS_FIRST_BLOCK(prev_block) &&
|
|
ZEND_MM_IS_GUARD_BLOCK(ZEND_MM_NEXT_BLOCK(prev_block))) {
|
|
mm_block = prev_block;
|
|
zend_mm_remove_from_free_list(heap, (zend_mm_free_block *) mm_block);
|
|
goto free_segment;
|
|
}
|
|
HANDLE_UNBLOCK_INTERRUPTIONS();
|
|
return;
|
|
}
|
|
} else {
|
|
/* merge with previous block */
|
|
prev_block=ZEND_MM_PREV_BLOCK(mm_block);
|
|
if (ZEND_MM_SMALL_SIZE(ZEND_MM_FREE_BLOCK_SIZE(prev_block))) {
|
|
size += ZEND_MM_FREE_BLOCK_SIZE(prev_block);
|
|
zend_mm_remove_from_free_list(heap, (zend_mm_free_block *) prev_block);
|
|
mm_block = prev_block;
|
|
} else {
|
|
ZEND_MM_BLOCK(prev_block, ZEND_MM_FREE_BLOCK, size + ZEND_MM_FREE_BLOCK_SIZE(prev_block));
|
|
if (ZEND_MM_IS_FIRST_BLOCK(prev_block) &&
|
|
ZEND_MM_IS_GUARD_BLOCK(ZEND_MM_NEXT_BLOCK(prev_block))) {
|
|
mm_block = prev_block;
|
|
zend_mm_remove_from_free_list(heap, (zend_mm_free_block *) mm_block);
|
|
goto free_segment;
|
|
}
|
|
HANDLE_UNBLOCK_INTERRUPTIONS();
|
|
return;
|
|
}
|
|
}
|
|
} else {
|
|
next_block = ZEND_MM_NEXT_BLOCK(mm_block);
|
|
if (ZEND_MM_IS_FREE_BLOCK(next_block)) {
|
|
/* merge with the next block */
|
|
zend_mm_remove_from_free_list(heap, (zend_mm_free_block *) next_block);
|
|
size += ZEND_MM_FREE_BLOCK_SIZE(next_block);
|
|
}
|
|
}
|
|
ZEND_MM_BLOCK(mm_block, ZEND_MM_FREE_BLOCK, size);
|
|
if (ZEND_MM_IS_FIRST_BLOCK(mm_block) &&
|
|
ZEND_MM_IS_GUARD_BLOCK(ZEND_MM_NEXT_BLOCK(mm_block))) {
|
|
free_segment:
|
|
zend_mm_del_segment(heap, (zend_mm_segment *) ((char *)mm_block - ZEND_MM_ALIGNED_SEGMENT_SIZE));
|
|
} else {
|
|
zend_mm_add_to_free_list(heap, (zend_mm_free_block *) mm_block);
|
|
}
|
|
HANDLE_UNBLOCK_INTERRUPTIONS();
|
|
}
|
|
|
|
static void *_zend_mm_realloc_int(zend_mm_heap *heap, void *p, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
{
|
|
zend_mm_block *mm_block = ZEND_MM_HEADER_OF(p);
|
|
zend_mm_block *next_block;
|
|
size_t true_size;
|
|
size_t orig_size;
|
|
void *ptr;
|
|
|
|
if (!p || !ZEND_MM_VALID_PTR(p)) {
|
|
return _zend_mm_alloc_int(heap, size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
}
|
|
mm_block = ZEND_MM_HEADER_OF(p);
|
|
true_size = ZEND_MM_TRUE_SIZE(size);
|
|
orig_size = ZEND_MM_BLOCK_SIZE(mm_block);
|
|
ZEND_MM_CHECK_PROTECTION(mm_block);
|
|
|
|
if (true_size < size) {
|
|
goto out_of_memory;
|
|
}
|
|
|
|
if (true_size <= orig_size) {
|
|
size_t remaining_size = orig_size - true_size;
|
|
|
|
if (remaining_size >= ZEND_MM_ALIGNED_MIN_HEADER_SIZE) {
|
|
zend_mm_free_block *new_free_block;
|
|
|
|
HANDLE_BLOCK_INTERRUPTIONS();
|
|
next_block = ZEND_MM_NEXT_BLOCK(mm_block);
|
|
if (ZEND_MM_IS_FREE_BLOCK(next_block)) {
|
|
remaining_size += ZEND_MM_FREE_BLOCK_SIZE(next_block);
|
|
zend_mm_remove_from_free_list(heap, (zend_mm_free_block *) next_block);
|
|
}
|
|
|
|
/* prepare new free block */
|
|
ZEND_MM_BLOCK(mm_block, ZEND_MM_USED_BLOCK, true_size);
|
|
new_free_block = (zend_mm_free_block *) ZEND_MM_BLOCK_AT(mm_block, true_size);
|
|
|
|
ZEND_MM_BLOCK(new_free_block, ZEND_MM_FREE_BLOCK, remaining_size);
|
|
|
|
/* add the new free block to the free list */
|
|
zend_mm_add_to_free_list(heap, new_free_block);
|
|
heap->size += (true_size - orig_size);
|
|
HANDLE_UNBLOCK_INTERRUPTIONS();
|
|
}
|
|
ZEND_MM_SET_DEBUG_INFO(mm_block, size, 0, 0);
|
|
return p;
|
|
}
|
|
|
|
next_block = ZEND_MM_NEXT_BLOCK(mm_block);
|
|
|
|
if (ZEND_MM_IS_FREE_BLOCK(next_block)) {
|
|
ZEND_MM_CHECK_COOKIE(next_block);
|
|
ZEND_MM_CHECK_BLOCK_LINKAGE(next_block);
|
|
if (orig_size + ZEND_MM_FREE_BLOCK_SIZE(next_block) >= true_size) {
|
|
size_t block_size = orig_size + ZEND_MM_FREE_BLOCK_SIZE(next_block);
|
|
size_t remaining_size = block_size - true_size;
|
|
|
|
HANDLE_BLOCK_INTERRUPTIONS();
|
|
zend_mm_remove_from_free_list(heap, (zend_mm_free_block *) next_block);
|
|
|
|
if (remaining_size < ZEND_MM_ALIGNED_MIN_HEADER_SIZE) {
|
|
true_size = block_size;
|
|
ZEND_MM_BLOCK(mm_block, ZEND_MM_USED_BLOCK, block_size);
|
|
} else {
|
|
zend_mm_free_block *new_free_block;
|
|
|
|
/* prepare new free block */
|
|
ZEND_MM_BLOCK(mm_block, ZEND_MM_USED_BLOCK, true_size);
|
|
new_free_block = (zend_mm_free_block *) ZEND_MM_BLOCK_AT(mm_block, true_size);
|
|
ZEND_MM_BLOCK(new_free_block, ZEND_MM_FREE_BLOCK, remaining_size);
|
|
|
|
/* add the new free block to the free list */
|
|
zend_mm_add_to_free_list(heap, new_free_block);
|
|
}
|
|
ZEND_MM_SET_DEBUG_INFO(mm_block, size, 0, 0);
|
|
heap->size = heap->size + true_size - orig_size;
|
|
if (heap->peak < heap->size) {
|
|
heap->peak = heap->size;
|
|
}
|
|
HANDLE_UNBLOCK_INTERRUPTIONS();
|
|
return p;
|
|
} else if (ZEND_MM_IS_FIRST_BLOCK(mm_block) &&
|
|
ZEND_MM_IS_GUARD_BLOCK(ZEND_MM_NEXT_BLOCK(next_block))) {
|
|
HANDLE_BLOCK_INTERRUPTIONS();
|
|
zend_mm_remove_from_free_list(heap, (zend_mm_free_block *) next_block);
|
|
goto realloc_segment;
|
|
}
|
|
} else if (ZEND_MM_IS_FIRST_BLOCK(mm_block) && ZEND_MM_IS_GUARD_BLOCK(next_block)) {
|
|
zend_mm_segment *segment;
|
|
zend_mm_segment *segment_copy;
|
|
size_t segment_size;
|
|
size_t block_size;
|
|
size_t remaining_size;
|
|
|
|
HANDLE_BLOCK_INTERRUPTIONS();
|
|
realloc_segment:
|
|
/* segment size, size of block and size of guard block */
|
|
if (true_size > heap->block_size - (ZEND_MM_ALIGNED_SEGMENT_SIZE + ZEND_MM_ALIGNED_HEADER_SIZE)) {
|
|
segment_size = true_size+ZEND_MM_ALIGNED_SEGMENT_SIZE+ZEND_MM_ALIGNED_HEADER_SIZE;
|
|
segment_size = ((segment_size + (heap->block_size-1)) / heap->block_size) * heap->block_size;
|
|
} else {
|
|
segment_size = heap->block_size;
|
|
}
|
|
|
|
segment_copy = (zend_mm_segment *) ((char *)mm_block - ZEND_MM_ALIGNED_SEGMENT_SIZE);
|
|
if (segment_size < true_size ||
|
|
heap->real_size + segment_size - segment_copy->size > heap->limit) {
|
|
#if ZEND_MM_CACHE
|
|
zend_mm_free_cache(heap);
|
|
#endif
|
|
HANDLE_UNBLOCK_INTERRUPTIONS();
|
|
#if ZEND_DEBUG
|
|
zend_mm_safe_error(heap, "Allowed memory size of %d bytes exhausted at %s:%d (tried to allocate %d bytes)", heap->limit, __zend_filename, __zend_lineno, size);
|
|
#else
|
|
zend_mm_safe_error(heap, "Allowed memory size of %d bytes exhausted (tried to allocate %d bytes)", heap->limit, size);
|
|
#endif
|
|
return NULL;
|
|
}
|
|
|
|
segment = ZEND_MM_STORAGE_REALLOC(segment_copy, segment_size);
|
|
if (!segment) {
|
|
#if ZEND_MM_CACHE
|
|
zend_mm_free_cache(heap);
|
|
#endif
|
|
HANDLE_UNBLOCK_INTERRUPTIONS();
|
|
out_of_memory:
|
|
#if ZEND_DEBUG
|
|
zend_mm_safe_error(heap, "Out of memory (allocated %d) at %s:%d (tried to allocate %d bytes)", heap->real_size, __zend_filename, __zend_lineno, size);
|
|
#else
|
|
zend_mm_safe_error(heap, "Out of memory (allocated %d) (tried to allocate %d bytes)", heap->real_size, size);
|
|
#endif
|
|
return NULL;
|
|
}
|
|
heap->real_size += segment_size - segment->size;
|
|
if (heap->real_size > heap->real_peak) {
|
|
heap->real_peak = heap->real_size;
|
|
}
|
|
|
|
segment->size = segment_size;
|
|
|
|
if (segment != segment_copy) {
|
|
if (heap->segments_list == segment_copy) {
|
|
heap->segments_list = segment;
|
|
} else {
|
|
zend_mm_segment *seg = heap->segments_list;
|
|
|
|
while (seg) {
|
|
if (seg->next_segment == segment_copy) {
|
|
seg->next_segment = segment;
|
|
break;
|
|
}
|
|
seg = seg->next_segment;
|
|
}
|
|
}
|
|
mm_block = (zend_mm_block *) ((char *) segment + ZEND_MM_ALIGNED_SEGMENT_SIZE);
|
|
ZEND_MM_MARK_FIRST_BLOCK(mm_block);
|
|
}
|
|
|
|
block_size = segment_size - ZEND_MM_ALIGNED_SEGMENT_SIZE - ZEND_MM_ALIGNED_HEADER_SIZE;
|
|
remaining_size = block_size - true_size;
|
|
|
|
/* setup guard block */
|
|
ZEND_MM_LAST_BLOCK(ZEND_MM_BLOCK_AT(mm_block, block_size));
|
|
|
|
if (remaining_size < ZEND_MM_ALIGNED_MIN_HEADER_SIZE) {
|
|
true_size = block_size;
|
|
ZEND_MM_BLOCK(mm_block, ZEND_MM_USED_BLOCK, true_size);
|
|
} else {
|
|
zend_mm_free_block *new_free_block;
|
|
|
|
/* prepare new free block */
|
|
ZEND_MM_BLOCK(mm_block, ZEND_MM_USED_BLOCK, true_size);
|
|
new_free_block = (zend_mm_free_block *) ZEND_MM_BLOCK_AT(mm_block, true_size);
|
|
ZEND_MM_BLOCK(new_free_block, ZEND_MM_FREE_BLOCK, remaining_size);
|
|
|
|
/* add the new free block to the free list */
|
|
zend_mm_add_to_free_list(heap, new_free_block);
|
|
}
|
|
|
|
ZEND_MM_SET_DEBUG_INFO(mm_block, size, 1, 1);
|
|
|
|
heap->size = heap->size + true_size - orig_size;
|
|
if (heap->peak < heap->size) {
|
|
heap->peak = heap->size;
|
|
}
|
|
|
|
HANDLE_UNBLOCK_INTERRUPTIONS();
|
|
return ZEND_MM_DATA_OF(mm_block);
|
|
}
|
|
|
|
ptr = _zend_mm_alloc_int(heap, size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
#if ZEND_DEBUG || ZEND_MM_HEAP_PROTECTION
|
|
memcpy(ptr, p, mm_block->debug.size);
|
|
#else
|
|
memcpy(ptr, p, orig_size - ZEND_MM_ALIGNED_HEADER_SIZE);
|
|
#endif
|
|
_zend_mm_free_int(heap, p ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
return ptr;
|
|
}
|
|
|
|
ZEND_API void *_zend_mm_alloc(zend_mm_heap *heap, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
{
|
|
return _zend_mm_alloc_int(heap, size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
}
|
|
|
|
ZEND_API void _zend_mm_free(zend_mm_heap *heap, void *p ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
{
|
|
_zend_mm_free_int(heap, p ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
}
|
|
|
|
ZEND_API void *_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_int(heap, ptr, size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
}
|
|
|
|
ZEND_API size_t _zend_mm_block_size(zend_mm_heap *heap, void *p ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
{
|
|
zend_mm_block *mm_block;
|
|
|
|
if (!ZEND_MM_VALID_PTR(p)) {
|
|
return 0;
|
|
}
|
|
mm_block = ZEND_MM_HEADER_OF(p);
|
|
ZEND_MM_CHECK_PROTECTION(mm_block);
|
|
#if ZEND_DEBUG || ZEND_MM_HEAP_PROTECTION
|
|
return mm_block->debug.size;
|
|
#else
|
|
return ZEND_MM_BLOCK_SIZE(mm_block);
|
|
#endif
|
|
}
|
|
|
|
/**********************/
|
|
/* 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) 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(TSRMLS_D)
|
|
{
|
|
return AG(mm_heap)->use_zend_alloc;
|
|
}
|
|
|
|
ZEND_API void *_emalloc(size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
{
|
|
TSRMLS_FETCH();
|
|
|
|
if (!AG(mm_heap)->use_zend_alloc) {
|
|
return malloc(size);
|
|
}
|
|
return _zend_mm_alloc_int(AG(mm_heap), size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
}
|
|
|
|
ZEND_API void _efree(void *ptr ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
{
|
|
TSRMLS_FETCH();
|
|
|
|
if (!AG(mm_heap)->use_zend_alloc) {
|
|
free(ptr);
|
|
return;
|
|
}
|
|
_zend_mm_free_int(AG(mm_heap), ptr ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
}
|
|
|
|
ZEND_API void *_erealloc(void *ptr, size_t size, int allow_failure ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
{
|
|
TSRMLS_FETCH();
|
|
|
|
if (!AG(mm_heap)->use_zend_alloc) {
|
|
return realloc(ptr, size);
|
|
}
|
|
return _zend_mm_realloc_int(AG(mm_heap), ptr, size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
}
|
|
|
|
ZEND_API size_t _zend_mem_block_size(void *ptr TSRMLS_DC ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
{
|
|
if (!AG(mm_heap)->use_zend_alloc) {
|
|
return 0;
|
|
}
|
|
return _zend_mm_block_size(AG(mm_heap), ptr ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
}
|
|
|
|
#include "zend_multiply.h"
|
|
|
|
ZEND_API void *_safe_emalloc(size_t nmemb, size_t size, size_t offset ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
{
|
|
|
|
if (nmemb < LONG_MAX
|
|
&& size < LONG_MAX
|
|
&& offset < LONG_MAX
|
|
&& nmemb >= 0
|
|
&& size >= 0
|
|
&& offset >= 0) {
|
|
long lval;
|
|
double dval;
|
|
int use_dval;
|
|
|
|
ZEND_SIGNED_MULTIPLY_LONG(nmemb, size, lval, dval, use_dval);
|
|
|
|
if (!use_dval
|
|
&& lval < (long) (LONG_MAX - offset)) {
|
|
return emalloc_rel(lval + offset);
|
|
}
|
|
}
|
|
|
|
zend_error(E_ERROR, "Possible integer overflow in memory allocation (%zd * %zd + %zd)", nmemb, size, offset);
|
|
return 0;
|
|
}
|
|
|
|
ZEND_API void *_safe_malloc(size_t nmemb, size_t size, size_t offset)
|
|
{
|
|
|
|
if (nmemb < LONG_MAX
|
|
&& size < LONG_MAX
|
|
&& offset < LONG_MAX
|
|
&& nmemb >= 0
|
|
&& size >= 0
|
|
&& offset >= 0) {
|
|
long lval;
|
|
double dval;
|
|
int use_dval;
|
|
|
|
ZEND_SIGNED_MULTIPLY_LONG(nmemb, size, lval, dval, use_dval);
|
|
|
|
if (!use_dval
|
|
&& lval < (long) (LONG_MAX - offset)) {
|
|
return pemalloc(lval + offset, 1);
|
|
}
|
|
}
|
|
|
|
zend_error(E_ERROR, "Possible integer overflow in memory allocation (%zd * %zd + %zd)", nmemb, size, offset);
|
|
return 0;
|
|
}
|
|
|
|
ZEND_API void *_ecalloc(size_t nmemb, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
{
|
|
void *p;
|
|
|
|
p = _safe_emalloc(nmemb, size, 0 ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
if (!p) {
|
|
return (void *) p;
|
|
}
|
|
memset(p, 0, size * nmemb);
|
|
return p;
|
|
}
|
|
|
|
ZEND_API char *_estrdup(const char *s ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
{
|
|
int length;
|
|
char *p;
|
|
|
|
length = strlen(s)+1;
|
|
p = (char *) _emalloc(length ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
if (!p) {
|
|
return (char *)NULL;
|
|
}
|
|
memcpy(p, s, length);
|
|
return p;
|
|
}
|
|
|
|
ZEND_API char *_estrndup(const char *s, uint length ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
{
|
|
char *p;
|
|
|
|
p = (char *) _emalloc(length+1 ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
if (!p) {
|
|
return (char *)NULL;
|
|
}
|
|
memcpy(p, s, length);
|
|
p[length] = 0;
|
|
return p;
|
|
}
|
|
|
|
|
|
ZEND_API char *zend_strndup(const char *s, uint length)
|
|
{
|
|
char *p;
|
|
|
|
p = (char *) malloc(length+1);
|
|
if (!p) {
|
|
return (char *)NULL;
|
|
}
|
|
if (length) {
|
|
memcpy(p, s, length);
|
|
}
|
|
p[length] = 0;
|
|
return p;
|
|
}
|
|
|
|
|
|
ZEND_API int zend_set_memory_limit(unsigned int memory_limit)
|
|
{
|
|
TSRMLS_FETCH();
|
|
|
|
AG(mm_heap)->limit = memory_limit;
|
|
return SUCCESS;
|
|
}
|
|
|
|
ZEND_API size_t zend_memory_usage(int real_usage TSRMLS_DC)
|
|
{
|
|
if (real_usage) {
|
|
return AG(mm_heap)->real_size;
|
|
} else {
|
|
return AG(mm_heap)->size;
|
|
}
|
|
}
|
|
|
|
ZEND_API size_t zend_memory_peak_usage(int real_usage TSRMLS_DC)
|
|
{
|
|
if (real_usage) {
|
|
return AG(mm_heap)->real_peak;
|
|
} else {
|
|
return AG(mm_heap)->peak;
|
|
}
|
|
}
|
|
|
|
ZEND_API void shutdown_memory_manager(int silent, int full_shutdown TSRMLS_DC)
|
|
{
|
|
zend_mm_shutdown(AG(mm_heap), full_shutdown, silent);
|
|
}
|
|
|
|
static void alloc_globals_ctor(zend_alloc_globals *alloc_globals TSRMLS_DC)
|
|
{
|
|
char *tmp;
|
|
alloc_globals->mm_heap = zend_mm_startup();
|
|
|
|
tmp = getenv("USE_ZEND_ALLOC");
|
|
if (tmp) {
|
|
alloc_globals->mm_heap->use_zend_alloc = zend_atoi(tmp, 0);
|
|
}
|
|
}
|
|
|
|
#ifdef ZTS
|
|
static void alloc_globals_dtor(zend_alloc_globals *alloc_globals TSRMLS_DC)
|
|
{
|
|
shutdown_memory_manager(1, 1 TSRMLS_CC);
|
|
}
|
|
#endif
|
|
|
|
ZEND_API void start_memory_manager(TSRMLS_D)
|
|
{
|
|
#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
|
|
}
|
|
|
|
ZEND_API zend_mm_heap *zend_mm_set_heap(zend_mm_heap *new_heap TSRMLS_DC)
|
|
{
|
|
zend_mm_heap *old_heap;
|
|
|
|
old_heap = AG(mm_heap);
|
|
AG(mm_heap) = new_heap;
|
|
return old_heap;
|
|
}
|
|
|
|
|
|
#if ZEND_DEBUG
|
|
ZEND_API int _mem_block_check(void *ptr, int silent ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
{
|
|
TSRMLS_FETCH();
|
|
|
|
if (!AG(mm_heap)->use_zend_alloc) {
|
|
return 1;
|
|
}
|
|
return zend_mm_check_ptr(AG(mm_heap), ptr, silent ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
}
|
|
|
|
|
|
ZEND_API void _full_mem_check(int silent ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
{
|
|
int errors;
|
|
TSRMLS_FETCH();
|
|
|
|
if (!AG(mm_heap)->use_zend_alloc) {
|
|
return;
|
|
}
|
|
|
|
zend_debug_alloc_output("------------------------------------------------\n");
|
|
zend_debug_alloc_output("Full Memory Check at %s:%d\n" ZEND_FILE_LINE_RELAY_CC);
|
|
|
|
errors = zend_mm_check_heap(AG(mm_heap), silent ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
|
|
zend_debug_alloc_output("End of full memory check %s:%d (%d errors)\n" ZEND_FILE_LINE_RELAY_CC, errors);
|
|
zend_debug_alloc_output("------------------------------------------------\n");
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Local variables:
|
|
* tab-width: 4
|
|
* c-basic-offset: 4
|
|
* indent-tabs-mode: t
|
|
* End:
|
|
*/
|