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https://github.com/php/php-src.git
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009025e00d
* fixed --enable-thread-safety build for UNIX I don't have a Win32 environment available, could someone please try compiling on Win32 to see if I got all the header file stuff right there?
554 lines
14 KiB
C
554 lines
14 KiB
C
/*
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+----------------------------------------------------------------------+
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| Zend Engine |
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+----------------------------------------------------------------------+
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| Copyright (c) 1998, 1999 Andi Gutmans, Zeev Suraski |
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+----------------------------------------------------------------------+
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| This source file is subject to version 0.91 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 at through the world-wide-web at |
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| http://www.zend.com/license/0_91.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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+----------------------------------------------------------------------+
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*/
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#include <stdlib.h>
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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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#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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#ifndef ZTS
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static zend_alloc_globals alloc_globals;
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#endif
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#if ZEND_DEBUG
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# define END_MAGIC_SIZE sizeof(long)
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# define END_ALIGNMENT(size) (((size)%PLATFORM_ALIGNMENT)?(PLATFORM_ALIGNMENT-((size)%PLATFORM_ALIGNMENT)):0)
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#else
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# define END_MAGIC_SIZE 0
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# define END_ALIGNMENT(size) 0
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#endif
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# if MEMORY_LIMIT
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# if ZEND_DEBUG
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#define CHECK_MEMORY_LIMIT(s) _CHECK_MEMORY_LIMIT(s ZEND_FILE_LINE_RELAY_CC)
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# else
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#define CHECK_MEMORY_LIMIT(s) _CHECK_MEMORY_LIMIT(s,NULL,0)
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# endif
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#define _CHECK_MEMORY_LIMIT(s,file,lineno) { AG(allocated_memory) += (s);\
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if (AG(memory_limit)<AG(allocated_memory)) {\
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if (!file) { \
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zend_error(E_ERROR,"Allowed memory size of %d bytes exhausted (tried to allocate %d bytes)", AG(memory_limit),s); \
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} else { \
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zend_error(E_ERROR,"Allowed memory size of %d bytes exhausted at %s:%d (tried to allocate %d bytes)", AG(memory_limit), file, lineno, s); \
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} \
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} \
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}
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# endif
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#ifndef CHECK_MEMORY_LIMIT
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#define CHECK_MEMORY_LIMIT(s)
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#endif
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#define REMOVE_POINTER_FROM_LIST(p) \
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if (!p->persistent && p==AG(head)) { \
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AG(head) = p->pNext; \
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} else if (p->persistent && p==AG(phead)) { \
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AG(phead) = p->pNext; \
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} else { \
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p->pLast->pNext = p->pNext; \
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} \
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if (p->pNext) { \
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p->pNext->pLast = p->pLast; \
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}
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#define ADD_POINTER_TO_LIST(p) \
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if (p->persistent) { \
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p->pNext = AG(phead); \
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if (AG(phead)) { \
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AG(phead)->pLast = p; \
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} \
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AG(phead) = p; \
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} else { \
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p->pNext = AG(head); \
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if (AG(head)) { \
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AG(head)->pLast = p; \
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} \
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AG(head) = p; \
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} \
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p->pLast = (mem_header *) NULL;
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ZEND_API void *_emalloc(size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
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{
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mem_header *p;
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ALS_FETCH();
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HANDLE_BLOCK_INTERRUPTIONS();
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if ((size < MAX_CACHED_MEMORY) && (AG(cache_count)[size] > 0)) {
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p = AG(cache)[size][--AG(cache_count)[size]];
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#if ZEND_DEBUG
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p->filename = __zend_filename;
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p->lineno = __zend_lineno;
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p->orig_filename = __zend_orig_filename;
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p->orig_lineno = __zend_orig_lineno;
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p->magic = MEM_BLOCK_START_MAGIC;
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p->reported = 0;
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#endif
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HANDLE_UNBLOCK_INTERRUPTIONS();
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p->persistent = 0;
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p->cached = 0;
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return (void *)((char *)p + sizeof(mem_header) + PLATFORM_PADDING);
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} else {
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p = (mem_header *) malloc(sizeof(mem_header) + size + PLATFORM_PADDING + END_ALIGNMENT(size) + END_MAGIC_SIZE);
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}
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if (!p) {
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fprintf(stderr,"FATAL: emalloc(): Unable to allocate %ld bytes\n", (long) size);
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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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HANDLE_UNBLOCK_INTERRUPTIONS();
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return (void *)p;
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}
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p->persistent = p->cached = 0;
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ADD_POINTER_TO_LIST(p);
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p->size = size;
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#if ZEND_DEBUG
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p->filename = __zend_filename;
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p->lineno = __zend_lineno;
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p->orig_filename = __zend_orig_filename;
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p->orig_lineno = __zend_orig_lineno;
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p->magic = MEM_BLOCK_START_MAGIC;
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p->reported = 0;
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*((long *)(((char *) p) + sizeof(mem_header)+size+PLATFORM_PADDING+END_ALIGNMENT(size))) = MEM_BLOCK_END_MAGIC;
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#endif
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#if MEMORY_LIMIT
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CHECK_MEMORY_LIMIT(size);
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#endif
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HANDLE_UNBLOCK_INTERRUPTIONS();
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return (void *)((char *)p + sizeof(mem_header) + PLATFORM_PADDING);
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}
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ZEND_API void _efree(void *ptr ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
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{
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mem_header *p = (mem_header *) ((char *)ptr - sizeof(mem_header) - PLATFORM_PADDING);
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ALS_FETCH();
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#if ZEND_DEBUG
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if (!_mem_block_check(ptr, 1 ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC)) {
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return;
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}
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memset(ptr, 0x5a, p->size);
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#endif
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if (!p->persistent && (p->size < MAX_CACHED_MEMORY) && (AG(cache_count)[p->size] < MAX_CACHED_ENTRIES)) {
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AG(cache)[p->size][AG(cache_count)[p->size]++] = p;
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p->cached = 1;
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#if ZEND_DEBUG
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p->magic = MEM_BLOCK_CACHED_MAGIC;
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#endif
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return;
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}
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HANDLE_BLOCK_INTERRUPTIONS();
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REMOVE_POINTER_FROM_LIST(p);
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#if MEMORY_LIMIT
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AG(allocated_memory) -= p->size;
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#endif
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free(p);
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HANDLE_UNBLOCK_INTERRUPTIONS();
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}
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ZEND_API void *_ecalloc(size_t nmemb, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
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{
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void *p;
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int final_size=size*nmemb;
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HANDLE_BLOCK_INTERRUPTIONS();
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p = _emalloc(final_size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
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if (!p) {
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HANDLE_UNBLOCK_INTERRUPTIONS();
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return (void *) p;
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}
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memset(p,(int)NULL,final_size);
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HANDLE_UNBLOCK_INTERRUPTIONS();
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return p;
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}
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ZEND_API void *_erealloc(void *ptr, size_t size, int allow_failure ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
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{
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mem_header *p = (mem_header *) ((char *)ptr-sizeof(mem_header)-PLATFORM_PADDING);
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mem_header *orig = p;
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ALS_FETCH();
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if (!ptr) {
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return _emalloc(size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
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}
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HANDLE_BLOCK_INTERRUPTIONS();
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REMOVE_POINTER_FROM_LIST(p);
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p = (mem_header *) realloc(p,sizeof(mem_header)+size+PLATFORM_PADDING+END_ALIGNMENT(size)+END_MAGIC_SIZE);
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if (!p) {
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if (!allow_failure) {
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fprintf(stderr,"FATAL: erealloc(): Unable to allocate %ld bytes\n", (long) size);
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#if ZEND_DEBUG && HAVE_KILL && 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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ADD_POINTER_TO_LIST(orig);
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HANDLE_UNBLOCK_INTERRUPTIONS();
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return (void *)NULL;
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}
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ADD_POINTER_TO_LIST(p);
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#if ZEND_DEBUG
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p->filename = __zend_filename;
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p->lineno = __zend_lineno;
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p->magic = MEM_BLOCK_START_MAGIC;
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*((long *)(((char *) p) + sizeof(mem_header)+size+PLATFORM_PADDING+END_ALIGNMENT(size))) = MEM_BLOCK_END_MAGIC;
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#endif
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#if MEMORY_LIMIT
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CHECK_MEMORY_LIMIT(size - p->size);
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#endif
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p->size = size;
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HANDLE_UNBLOCK_INTERRUPTIONS();
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return (void *)((char *)p+sizeof(mem_header)+PLATFORM_PADDING);
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}
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ZEND_API char *_estrdup(const char *s ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
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{
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int length;
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char *p;
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length = strlen(s)+1;
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HANDLE_BLOCK_INTERRUPTIONS();
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p = (char *) _emalloc(length ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
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if (!p) {
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HANDLE_UNBLOCK_INTERRUPTIONS();
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return (char *)NULL;
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}
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HANDLE_UNBLOCK_INTERRUPTIONS();
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memcpy(p,s,length);
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return p;
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}
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ZEND_API char *_estrndup(const char *s, uint length ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
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{
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char *p;
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HANDLE_BLOCK_INTERRUPTIONS();
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p = (char *) _emalloc(length+1 ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
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if (!p) {
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HANDLE_UNBLOCK_INTERRUPTIONS();
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return (char *)NULL;
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}
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HANDLE_UNBLOCK_INTERRUPTIONS();
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memcpy(p,s,length);
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p[length]=0;
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return p;
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}
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ZEND_API char *zend_strndup(const char *s, uint length)
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{
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char *p;
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p = (char *) malloc(length+1);
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if (!p) {
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return (char *)NULL;
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}
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if (length) {
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memcpy(p,s,length);
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}
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p[length]=0;
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return p;
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}
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ZEND_API int zend_set_memory_limit(unsigned int memory_limit)
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{
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#if MEMORY_LIMIT
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ALS_FETCH();
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AG(memory_limit) = memory_limit;
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return SUCCESS;
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#else
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return FAILURE;
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#endif
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}
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ZEND_API void start_memory_manager(ALS_D)
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{
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AG(phead) = AG(head) = NULL;
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#if MEMORY_LIMIT
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AG(memory_limit)=1<<30; /* rediculous limit, effectively no limit */
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AG(allocated_memory)=0;
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AG(memory_exhausted)=0;
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#endif
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memset(AG(cache_count),0,MAX_CACHED_MEMORY*sizeof(unsigned char));
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}
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ZEND_API void shutdown_memory_manager(int silent, int clean_cache)
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{
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mem_header *p, *t;
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#if ZEND_DEBUG
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int had_leaks=0;
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#endif
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ALS_FETCH();
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p=AG(head);
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t=AG(head);
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while (t) {
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if (!t->cached || clean_cache) {
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#if ZEND_DEBUG
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if (!t->cached && !t->reported) {
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mem_header *iterator;
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int total_leak=0, total_leak_count=0;
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had_leaks=1;
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if (!silent) {
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zend_message_dispatcher(ZMSG_MEMORY_LEAK_DETECTED, t);
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}
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t->reported = 1;
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for (iterator=t->pNext; iterator; iterator=iterator->pNext) {
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if (!iterator->cached
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&& iterator->filename==t->filename
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&& iterator->lineno==t->lineno) {
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total_leak += iterator->size;
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total_leak_count++;
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iterator->reported = 1;
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}
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}
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if (!silent && total_leak_count>0) {
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zend_message_dispatcher(ZMSG_MEMORY_LEAK_REPEATED, (void *) (long) (total_leak_count));
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}
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}
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#endif
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p = t->pNext;
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REMOVE_POINTER_FROM_LIST(t);
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free(t);
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t = p;
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} else {
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t = t->pNext;
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}
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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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#if WIN32||WINNT
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OutputDebugString(output_buf);
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#else
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fprintf(stderr, output_buf);
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#endif
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}
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ZEND_API int _mem_block_check(void *ptr, int silent ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
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{
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mem_header *p = (mem_header *) ((char *)ptr - sizeof(mem_header) - PLATFORM_PADDING);
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int no_cache_notice=0;
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int valid_beginning=1;
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int had_problems=0;
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if (silent==2) {
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silent=1;
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no_cache_notice=1;
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}
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if (silent==3) {
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silent=0;
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no_cache_notice=1;
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}
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if (!silent) {
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zend_message_dispatcher(ZMSG_LOG_SCRIPT_NAME, NULL);
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zend_debug_alloc_output("---------------------------------------\n");
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zend_debug_alloc_output("%s(%d) : Block 0x%0.8lX status:\n" ZEND_FILE_LINE_RELAY_CC, (long) p);
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if (__zend_orig_filename) {
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zend_debug_alloc_output("%s(%d) : Actual location (location was relayed)\n" ZEND_FILE_LINE_ORIG_RELAY_CC);
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}
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zend_debug_alloc_output("%10s\t","Beginning: ");
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}
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switch (p->magic) {
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case MEM_BLOCK_START_MAGIC:
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if (!silent) {
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zend_debug_alloc_output("OK (allocated on %s:%d, %d bytes)\n", p->filename, p->lineno, p->size);
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}
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break; /* ok */
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case MEM_BLOCK_FREED_MAGIC:
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if (!silent) {
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zend_debug_alloc_output("Freed\n");
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had_problems=1;
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} else {
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return _mem_block_check(ptr, 0 ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
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}
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break;
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case MEM_BLOCK_CACHED_MAGIC:
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if (!silent) {
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if (!no_cache_notice) {
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zend_debug_alloc_output("Cached (allocated on %s:%d, %d bytes)\n", p->filename, p->lineno, p->size);
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had_problems=1;
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}
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} else {
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if (!no_cache_notice) {
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return _mem_block_check(ptr, 0 ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
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}
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}
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break;
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default:
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if (!silent) {
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zend_debug_alloc_output("Overrun (magic=0x%0.8lX, expected=0x%0.8lX)\n", p->magic, MEM_BLOCK_START_MAGIC);
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} else {
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return _mem_block_check(ptr, 0 ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
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}
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had_problems=1;
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valid_beginning=0;
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break;
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}
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if (valid_beginning
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&& *((long *)(((char *) p)+sizeof(mem_header)+p->size+PLATFORM_PADDING+END_ALIGNMENT(p->size))) != MEM_BLOCK_END_MAGIC) {
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long magic_num = MEM_BLOCK_END_MAGIC;
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char *overflow_ptr, *magic_ptr=(char *) &magic_num;
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int overflows=0;
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int i;
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if (silent) {
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return _mem_block_check(ptr, 0 ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
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}
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had_problems=1;
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overflow_ptr = ((char *) p)+sizeof(mem_header)+p->size+PLATFORM_PADDING;
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for (i=0; i<sizeof(long); i++) {
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if (overflow_ptr[i]!=magic_ptr[i]) {
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overflows++;
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}
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}
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zend_debug_alloc_output("%10s\t", "End:");
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zend_debug_alloc_output("Overflown (magic=0x%0.8lX instead of 0x%0.8lX)\n",
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*((long *)(((char *) p) + sizeof(mem_header)+p->size+PLATFORM_PADDING+END_ALIGNMENT(p->size))), MEM_BLOCK_END_MAGIC);
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zend_debug_alloc_output("%10s\t","");
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if (overflows>=sizeof(long)) {
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zend_debug_alloc_output("At least %d bytes overflown\n", sizeof(long));
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} else {
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zend_debug_alloc_output("%d byte(s) overflown\n", overflows);
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}
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} else if (!silent) {
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zend_debug_alloc_output("%10s\t", "End:");
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if (valid_beginning) {
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zend_debug_alloc_output("OK\n");
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} else {
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zend_debug_alloc_output("Unknown\n");
|
|
}
|
|
}
|
|
|
|
if (had_problems) {
|
|
int foo = 5;
|
|
|
|
foo+=1;
|
|
}
|
|
|
|
if (!silent) {
|
|
zend_debug_alloc_output("---------------------------------------\n");
|
|
}
|
|
return ((!had_problems) ? 1 : 0);
|
|
}
|
|
|
|
|
|
ZEND_API void _full_mem_check(int silent ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
{
|
|
mem_header *p;
|
|
int errors=0;
|
|
ALS_FETCH();
|
|
|
|
p = AG(head);
|
|
|
|
|
|
zend_debug_alloc_output("------------------------------------------------\n");
|
|
zend_debug_alloc_output("Full Memory Check at %s:%d\n" ZEND_FILE_LINE_RELAY_CC);
|
|
|
|
while (p) {
|
|
if (!_mem_block_check((void *)((char *)p + sizeof(mem_header) + PLATFORM_PADDING), (silent?2:3) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC)) {
|
|
errors++;
|
|
}
|
|
p = p->pNext;
|
|
}
|
|
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
|
|
|
|
|
|
ZEND_API void _persist_alloc(void *ptr ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
|
|
{
|
|
mem_header *p = (mem_header *) ((char *)ptr-sizeof(mem_header)-PLATFORM_PADDING);
|
|
ALS_FETCH();
|
|
|
|
#if ZEND_DEBUG
|
|
_mem_block_check(ptr, 1 ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
|
|
#endif
|
|
|
|
HANDLE_BLOCK_INTERRUPTIONS();
|
|
|
|
/* remove the block from the non persistent list */
|
|
REMOVE_POINTER_FROM_LIST(p);
|
|
|
|
p->persistent = 1;
|
|
|
|
/* add the block to the persistent list */
|
|
ADD_POINTER_TO_LIST(p);
|
|
HANDLE_UNBLOCK_INTERRUPTIONS();
|
|
}
|
|
|
|
|
|
/*
|
|
* Local variables:
|
|
* tab-width: 4
|
|
* c-basic-offset: 4
|
|
* End:
|
|
*/
|