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7b073bbad8
php-src/Zend/zend_alloc.c
Ilia Alshanetsky 3b329a9926 MFH: Fixed bug #34156 (memory usage remains elevated after memory limit is 
reached);
2005-08-18 15:14:12 +00:00

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/*
+----------------------------------------------------------------------+
| Zend Engine |
+----------------------------------------------------------------------+
| Copyright (c) 1998-2005 Zend Technologies Ltd. (http://www.zend.com) |
+----------------------------------------------------------------------+
| This source file is subject to version 2.00 of the Zend license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.zend.com/license/2_00.txt. |
| If you did not receive a copy of the Zend license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@zend.com so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Andi Gutmans <andi@zend.com> |
| Zeev Suraski <zeev@zend.com> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#include "zend.h"
#include "zend_alloc.h"
#include "zend_globals.h"
#include "zend_fast_cache.h"
#ifdef HAVE_SIGNAL_H
# include <signal.h>
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include "zend_mm.h"
#ifndef ZTS
ZEND_API zend_alloc_globals alloc_globals;
#endif
#ifdef ZEND_MM
#define ZEND_DISABLE_MEMORY_CACHE 0
#else
#define ZEND_DISABLE_MEMORY_CACHE 0
#endif
#ifdef ZEND_MM
#define ZEND_DO_MALLOC(size) zend_mm_alloc(&AG(mm_heap), size)
#define ZEND_DO_FREE(ptr) zend_mm_free(&AG(mm_heap), ptr)
#define ZEND_DO_REALLOC(ptr, size) zend_mm_realloc(&AG(mm_heap), ptr, size)
#elif defined(ZEND_WIN32)
#define ZEND_DO_MALLOC(size) (AG(memory_heap) ? HeapAlloc(AG(memory_heap), HEAP_NO_SERIALIZE, size) : malloc(size))
#define ZEND_DO_FREE(ptr) (AG(memory_heap) ? HeapFree(AG(memory_heap), HEAP_NO_SERIALIZE, ptr) : free(ptr))
#define ZEND_DO_REALLOC(ptr, size) (AG(memory_heap) ? HeapReAlloc(AG(memory_heap), HEAP_NO_SERIALIZE, ptr, size) : realloc(ptr, size))
#else
#define ZEND_DO_MALLOC(size) malloc(size)
#define ZEND_DO_FREE(ptr) free(ptr)
#define ZEND_DO_REALLOC(ptr, size) realloc(ptr, size)
#endif
#if ZEND_DEBUG
# define END_MAGIC_SIZE sizeof(long)
static long mem_block_end_magic = MEM_BLOCK_END_MAGIC;
#else
# define END_MAGIC_SIZE 0
#endif
# if MEMORY_LIMIT
# if ZEND_DEBUG
#define CHECK_MEMORY_LIMIT(s, rs) _CHECK_MEMORY_LIMIT(s, rs, __zend_filename, __zend_lineno)
# else
#define CHECK_MEMORY_LIMIT(s, rs) _CHECK_MEMORY_LIMIT(s, rs, NULL, 0)
# endif
#define _CHECK_MEMORY_LIMIT(s, rs, file, lineno) { AG(allocated_memory) += rs;\
if (AG(memory_limit)<AG(allocated_memory)) {\
int php_mem_limit = AG(memory_limit); \
AG(allocated_memory) -= rs; \
if (EG(in_execution) && AG(memory_limit)+1048576 > AG(allocated_memory)) { \
AG(memory_limit) = AG(allocated_memory) + 1048576; \
if (file) { \
zend_error(E_ERROR,"Allowed memory size of %d bytes exhausted at %s:%d (tried to allocate %d bytes)", php_mem_limit, file, lineno, s); \
} else { \
zend_error(E_ERROR,"Allowed memory size of %d bytes exhausted (tried to allocate %d bytes)", php_mem_limit, s); \
} \
} else { \
if (file) { \
fprintf(stderr, "Allowed memory size of %d bytes exhausted at %s:%d (tried to allocate %d bytes)\n", php_mem_limit, file, lineno, s); \
} else { \
fprintf(stderr, "Allowed memory size of %d bytes exhausted (tried to allocate %d bytes)\n", php_mem_limit, s); \
} \
exit(1); \
} \
} \
}
# endif
#ifndef CHECK_MEMORY_LIMIT
#define CHECK_MEMORY_LIMIT(s, rs)
#endif
#if ZEND_DEBUG || !defined(ZEND_MM)
#define REMOVE_POINTER_FROM_LIST(p) \
if (p==AG(head)) { \
AG(head) = p->pNext; \
} else { \
p->pLast->pNext = p->pNext; \
} \
if (p->pNext) { \
p->pNext->pLast = p->pLast; \
}
#else
#define REMOVE_POINTER_FROM_LIST(p)
#endif
#if ZEND_DEBUG || !defined(ZEND_MM)
#define ADD_POINTER_TO_LIST(p) \
p->pNext = AG(head); \
if (AG(head)) { \
AG(head)->pLast = p; \
} \
AG(head) = p; \
p->pLast = (zend_mem_header *) NULL;
#else
#define ADD_POINTER_TO_LIST(p)
#endif
#define DECLARE_CACHE_VARS() \
unsigned int real_size; \
unsigned int cache_index
#define REAL_SIZE(size) ((size+7) & ~0x7)
#define CALCULATE_REAL_SIZE_AND_CACHE_INDEX(size) \
real_size = REAL_SIZE(size); \
cache_index = real_size >> 3;
#define SIZE real_size
#define CACHE_INDEX cache_index
ZEND_API void *_emalloc(size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
{
zend_mem_header *p;
DECLARE_CACHE_VARS();
TSRMLS_FETCH();
CALCULATE_REAL_SIZE_AND_CACHE_INDEX(size);
#if !ZEND_DISABLE_MEMORY_CACHE
if ((CACHE_INDEX < MAX_CACHED_MEMORY) && (AG(cache_count)[CACHE_INDEX] > 0)) {
p = AG(cache)[CACHE_INDEX][--AG(cache_count)[CACHE_INDEX]];
#if ZEND_DEBUG
p->filename = __zend_filename;
p->lineno = __zend_lineno;
p->orig_filename = __zend_orig_filename;
p->orig_lineno = __zend_orig_lineno;
p->magic = MEM_BLOCK_START_MAGIC;
p->reported = 0;
/* Setting the thread id should not be necessary, because we fetched this block
* from this thread's cache
*/
AG(cache_stats)[CACHE_INDEX][1]++;
memcpy((((char *) p) + sizeof(zend_mem_header) + MEM_HEADER_PADDING + size), &mem_block_end_magic, sizeof(long));
#endif
p->size = size;
return (void *)((char *)p + sizeof(zend_mem_header) + MEM_HEADER_PADDING);
} else {
#endif
#if ZEND_DEBUG
if (CACHE_INDEX<MAX_CACHED_MEMORY) {
AG(cache_stats)[CACHE_INDEX][0]++;
}
#endif
#if MEMORY_LIMIT
CHECK_MEMORY_LIMIT(size, SIZE);
if (AG(allocated_memory) > AG(allocated_memory_peak)) {
AG(allocated_memory_peak) = AG(allocated_memory);
}
#endif
p = (zend_mem_header *) ZEND_DO_MALLOC(sizeof(zend_mem_header) + MEM_HEADER_PADDING + SIZE + END_MAGIC_SIZE);
#if !ZEND_DISABLE_MEMORY_CACHE
}
#endif
HANDLE_BLOCK_INTERRUPTIONS();
if (!p) {
fprintf(stderr,"FATAL: emalloc(): Unable to allocate %ld bytes\n", (long) size);
#if ZEND_DEBUG && defined(HAVE_KILL) && defined(HAVE_GETPID)
kill(getpid(), SIGSEGV);
#else
exit(1);
#endif
HANDLE_UNBLOCK_INTERRUPTIONS();
return (void *)p;
}
ADD_POINTER_TO_LIST(p);
p->size = size; /* Save real size for correct cache output */
#if ZEND_DEBUG
p->filename = __zend_filename;
p->lineno = __zend_lineno;
p->orig_filename = __zend_orig_filename;
p->orig_lineno = __zend_orig_lineno;
p->magic = MEM_BLOCK_START_MAGIC;
p->reported = 0;
# ifdef ZTS
p->thread_id = tsrm_thread_id();
# endif
memcpy((((char *) p) + sizeof(zend_mem_header) + MEM_HEADER_PADDING + size), &mem_block_end_magic, sizeof(long));
#endif
HANDLE_UNBLOCK_INTERRUPTIONS();
return (void *)((char *)p + sizeof(zend_mem_header) + MEM_HEADER_PADDING);
}
#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 _efree(void *ptr ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
{
zend_mem_header *p = (zend_mem_header *) ((char *)ptr - sizeof(zend_mem_header) - MEM_HEADER_PADDING);
DECLARE_CACHE_VARS();
TSRMLS_FETCH();
#if defined(ZTS) && TSRM_DEBUG
if (p->thread_id != tsrm_thread_id()) {
tsrm_error(TSRM_ERROR_LEVEL_ERROR, "Memory block allocated at %s:(%d) on thread %x freed at %s:(%d) on thread %x, ignoring",
p->filename, p->lineno, p->thread_id,
__zend_filename, __zend_lineno, tsrm_thread_id());
return;
}
#endif
CALCULATE_REAL_SIZE_AND_CACHE_INDEX(p->size);
#if ZEND_DEBUG
if (!_mem_block_check(ptr, 1 ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC)) {
return;
}
memset(ptr, 0x5a, p->size);
#endif
#if !ZEND_DISABLE_MEMORY_CACHE
if ((CACHE_INDEX < MAX_CACHED_MEMORY) && (AG(cache_count)[CACHE_INDEX] < MAX_CACHED_ENTRIES)) {
AG(cache)[CACHE_INDEX][AG(cache_count)[CACHE_INDEX]++] = p;
#if ZEND_DEBUG
p->magic = MEM_BLOCK_CACHED_MAGIC;
#endif
return;
}
#endif
HANDLE_BLOCK_INTERRUPTIONS();
REMOVE_POINTER_FROM_LIST(p);
#if MEMORY_LIMIT
AG(allocated_memory) -= SIZE;
#endif
ZEND_DO_FREE(p);
HANDLE_UNBLOCK_INTERRUPTIONS();
}
ZEND_API void *_ecalloc(size_t nmemb, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
{
void *p;
int final_size = size*nmemb;
HANDLE_BLOCK_INTERRUPTIONS();
p = _emalloc(final_size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
if (!p) {
HANDLE_UNBLOCK_INTERRUPTIONS();
return (void *) p;
}
memset(p, 0, final_size);
HANDLE_UNBLOCK_INTERRUPTIONS();
return p;
}
ZEND_API void *_erealloc(void *ptr, size_t size, int allow_failure ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
{
zend_mem_header *p;
zend_mem_header *orig;
DECLARE_CACHE_VARS();
TSRMLS_FETCH();
if (!ptr) {
return _emalloc(size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
}
p = orig = (zend_mem_header *) ((char *)ptr-sizeof(zend_mem_header)-MEM_HEADER_PADDING);
#if defined(ZTS) && TSRM_DEBUG
if (p->thread_id != tsrm_thread_id()) {
void *new_p;
tsrm_error(TSRM_ERROR_LEVEL_ERROR, "Memory block allocated at %s:(%d) on thread %x reallocated at %s:(%d) on thread %x, duplicating",
p->filename, p->lineno, p->thread_id,
__zend_filename, __zend_lineno, tsrm_thread_id());
new_p = _emalloc(size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
memcpy(new_p, ptr, p->size);
return new_p;
}
#endif
CALCULATE_REAL_SIZE_AND_CACHE_INDEX(size);
HANDLE_BLOCK_INTERRUPTIONS();
#if MEMORY_LIMIT
CHECK_MEMORY_LIMIT(size - p->size, SIZE - REAL_SIZE(p->size));
if (AG(allocated_memory) > AG(allocated_memory_peak)) {
AG(allocated_memory_peak) = AG(allocated_memory);
}
#endif
REMOVE_POINTER_FROM_LIST(p);
p = (zend_mem_header *) ZEND_DO_REALLOC(p, sizeof(zend_mem_header)+MEM_HEADER_PADDING+SIZE+END_MAGIC_SIZE);
if (!p) {
if (!allow_failure) {
fprintf(stderr,"FATAL: erealloc(): Unable to allocate %ld bytes\n", (long) size);
#if ZEND_DEBUG && HAVE_KILL && HAVE_GETPID
kill(getpid(), SIGSEGV);
#else
exit(1);
#endif
}
ADD_POINTER_TO_LIST(orig);
HANDLE_UNBLOCK_INTERRUPTIONS();
return (void *)NULL;
}
ADD_POINTER_TO_LIST(p);
#if ZEND_DEBUG
p->filename = __zend_filename;
p->lineno = __zend_lineno;
p->magic = MEM_BLOCK_START_MAGIC;
memcpy((((char *) p) + sizeof(zend_mem_header) + MEM_HEADER_PADDING + size), &mem_block_end_magic, sizeof(long));
#endif
p->size = size;
HANDLE_UNBLOCK_INTERRUPTIONS();
return (void *)((char *)p+sizeof(zend_mem_header)+MEM_HEADER_PADDING);
}
ZEND_API char *_estrdup(const char *s ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
{
int length;
char *p;
length = strlen(s)+1;
HANDLE_BLOCK_INTERRUPTIONS();
p = (char *) _emalloc(length ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
if (!p) {
HANDLE_UNBLOCK_INTERRUPTIONS();
return (char *)NULL;
}
HANDLE_UNBLOCK_INTERRUPTIONS();
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;
HANDLE_BLOCK_INTERRUPTIONS();
p = (char *) _emalloc(length+1 ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
if (!p) {
HANDLE_UNBLOCK_INTERRUPTIONS();
return (char *)NULL;
}
HANDLE_UNBLOCK_INTERRUPTIONS();
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)
{
#if MEMORY_LIMIT
TSRMLS_FETCH();
AG(memory_limit) = memory_limit;
return SUCCESS;
#else
return FAILURE;
#endif
}
ZEND_API void start_memory_manager(TSRMLS_D)
{
AG(head) = NULL;
#if MEMORY_LIMIT
AG(memory_limit) = 1<<30; /* ridiculous limit, effectively no limit */
AG(allocated_memory) = 0;
AG(memory_exhausted) = 0;
AG(allocated_memory_peak) = 0;
#endif
#if ZEND_ENABLE_FAST_CACHE
memset(AG(fast_cache_list_head), 0, sizeof(AG(fast_cache_list_head)));
#endif
#if !ZEND_DISABLE_MEMORY_CACHE
memset(AG(cache_count), 0, sizeof(AG(cache_count)));
#endif
#ifdef ZEND_MM
zend_mm_startup(&AG(mm_heap), 256*1024);
#elif defined(ZEND_WIN32)
AG(memory_heap) = HeapCreate(HEAP_NO_SERIALIZE, 256*1024, 0);
#endif
#if ZEND_DEBUG
memset(AG(cache_stats), 0, sizeof(AG(cache_stats)));
memset(AG(fast_cache_stats), 0, sizeof(AG(fast_cache_stats)));
#endif
}
ZEND_API void shutdown_memory_manager(int silent, int full_shutdown TSRMLS_DC)
{
#if ZEND_DEBUG || !defined(ZEND_MM)
zend_mem_header *p, *t;
#endif
#if ZEND_DEBUG
zend_uint grand_total_leaks=0;
#endif
#if !ZEND_DISABLE_MEMORY_CACHE
/* Free memory cache even on partial shutdown to avoid fragmentation */
if (1 || full_shutdown) {
unsigned int i, j;
zend_mem_header *ptr;
for (i=0; i<MAX_CACHED_MEMORY; i++) {
for (j=0; j<AG(cache_count)[i]; j++) {
ptr = (zend_mem_header *) AG(cache)[i][j];
# if MEMORY_LIMIT
AG(allocated_memory) -= REAL_SIZE(ptr->size);
# endif
REMOVE_POINTER_FROM_LIST(ptr);
ZEND_DO_FREE(ptr);
}
AG(cache_count)[i] = 0;
}
}
#endif /* !ZEND_DISABLE_MEMORY_CACHE */
#if defined(ZEND_MM) && !ZEND_DEBUG
zend_mm_shutdown(&AG(mm_heap));
if (full_shutdown) {
return;
}
zend_mm_startup(&AG(mm_heap), 256*1024);
#elif defined(ZEND_WIN32) && !ZEND_DEBUG
if (full_shutdown && AG(memory_heap)) {
HeapDestroy(AG(memory_heap));
return;
}
#endif
#if ZEND_ENABLE_FAST_CACHE
{
zend_fast_cache_list_entry *fast_cache_list_entry, *next_fast_cache_list_entry;
unsigned int fci;
for (fci=0; fci<MAX_FAST_CACHE_TYPES; fci++) {
fast_cache_list_entry = AG(fast_cache_list_head)[fci];
while (fast_cache_list_entry) {
next_fast_cache_list_entry = fast_cache_list_entry->next;
efree(fast_cache_list_entry);
fast_cache_list_entry = next_fast_cache_list_entry;
}
AG(fast_cache_list_head)[fci] = NULL;
}
}
#endif /* ZEND_ENABLE_FAST_CACHE */
#if ZEND_DEBUG || !defined(ZEND_MM)
p = AG(head);
t = AG(head);
while (t) {
#if ZEND_DEBUG
if (!t->reported) {
zend_mem_header *iterator;
int total_leak=0, total_leak_count=0;
grand_total_leaks++;
if (!silent) {
zend_message_dispatcher(ZMSG_MEMORY_LEAK_DETECTED, t);
}
t->reported = 1;
for (iterator=t->pNext; iterator; iterator=iterator->pNext) {
if (iterator->filename==t->filename && iterator->lineno==t->lineno) {
total_leak += iterator->size;
total_leak_count++;
iterator->reported = 1;
}
}
if (!silent && total_leak_count>0) {
zend_message_dispatcher(ZMSG_MEMORY_LEAK_REPEATED, (void *) (long) (total_leak_count));
}
grand_total_leaks += total_leak_count;
}
#endif
#if MEMORY_LIMIT
AG(allocated_memory) -= REAL_SIZE(t->size);
#endif
p = t->pNext;
REMOVE_POINTER_FROM_LIST(t);
ZEND_DO_FREE(t);
t = p;
}
#if ZEND_DEBUG
if (!silent && grand_total_leaks > 0) {
zend_message_dispatcher(ZMSG_MEMORY_LEAKS_GRAND_TOTAL, &grand_total_leaks);
}
#endif
#if MEMORY_LIMIT
AG(memory_exhausted)=0;
AG(allocated_memory_peak) = 0;
#endif
#if (ZEND_DEBUG)
do {
zval display_memory_cache_stats;
int i, j;
if (full_shutdown) {
/* we're shutting down completely, don't even touch the INI subsystem */
break;
}
if (zend_get_configuration_directive("display_memory_cache_stats", sizeof("display_memory_cache_stats"), &display_memory_cache_stats)==FAILURE) {
break;
}
if (!atoi(display_memory_cache_stats.value.str.val)) {
break;
}
fprintf(stderr, "Memory cache statistics\n"
"-----------------------\n\n"
"[zval, %2ld]\t\t%d / %d (%.2f%%)\n"
"[hash, %2ld]\t\t%d / %d (%.2f%%)\n",
(long) sizeof(zval),
AG(fast_cache_stats)[ZVAL_CACHE_LIST][1], AG(fast_cache_stats)[ZVAL_CACHE_LIST][0]+AG(fast_cache_stats)[ZVAL_CACHE_LIST][1],
((double) AG(fast_cache_stats)[ZVAL_CACHE_LIST][1] / (AG(fast_cache_stats)[ZVAL_CACHE_LIST][0]+AG(fast_cache_stats)[ZVAL_CACHE_LIST][1]))*100,
(long) sizeof(HashTable),
AG(fast_cache_stats)[HASHTABLE_CACHE_LIST][1], AG(fast_cache_stats)[HASHTABLE_CACHE_LIST][0]+AG(fast_cache_stats)[HASHTABLE_CACHE_LIST][1],
((double) AG(fast_cache_stats)[HASHTABLE_CACHE_LIST][1] / (AG(fast_cache_stats)[HASHTABLE_CACHE_LIST][0]+AG(fast_cache_stats)[HASHTABLE_CACHE_LIST][1]))*100);
for (i=0; i<MAX_CACHED_MEMORY; i+=2) {
fprintf(stderr, "[%2d, %2d]\t\t", i, i+1);
for (j=0; j<2; j++) {
fprintf(stderr, "%d / %d (%.2f%%)\t\t",
AG(cache_stats)[i+j][1], AG(cache_stats)[i+j][0]+AG(cache_stats)[i+j][1],
((double) AG(cache_stats)[i+j][1] / (AG(cache_stats)[i+j][0]+AG(cache_stats)[i+j][1]))*100);
}
fprintf(stderr, "\n");
}
} while (0);
#endif
#endif
#if defined(ZEND_MM) && ZEND_DEBUG
zend_mm_shutdown(&AG(mm_heap));
if (full_shutdown) {
return;
}
zend_mm_startup(&AG(mm_heap), 256*1024);
#elif defined(ZEND_WIN32) && ZEND_DEBUG
if (full_shutdown && AG(memory_heap)) {
HeapDestroy(AG(memory_heap));
return;
}
#endif
}
#if ZEND_DEBUG
void zend_debug_alloc_output(char *format, ...)
{
char output_buf[256];
va_list args;
va_start(args, format);
vsprintf(output_buf, format, args);
va_end(args);
#ifdef ZEND_WIN32
OutputDebugString(output_buf);
#else
fprintf(stderr, "%s", output_buf);
#endif
}
ZEND_API int _mem_block_check(void *ptr, int silent ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
{
zend_mem_header *p = (zend_mem_header *) ((char *)ptr - sizeof(zend_mem_header) - MEM_HEADER_PADDING);
int no_cache_notice=0;
int valid_beginning=1;
int had_problems=0;
long end_magic;
if (silent==2) {
silent = 1;
no_cache_notice = 1;
}
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) p);
if (__zend_orig_filename) {
zend_debug_alloc_output("%s(%d) : Actual location (location was relayed)\n" ZEND_FILE_LINE_ORIG_RELAY_CC);
}
zend_debug_alloc_output("%10s\t","Beginning: ");
}
switch (p->magic) {
case MEM_BLOCK_START_MAGIC:
if (!silent) {
zend_debug_alloc_output("OK (allocated on %s:%d, %d bytes)\n", p->filename, p->lineno, p->size);
}
break; /* ok */
case MEM_BLOCK_FREED_MAGIC:
if (!silent) {
zend_debug_alloc_output("Freed\n");
had_problems = 1;
} else {
return _mem_block_check(ptr, 0 ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
}
break;
case MEM_BLOCK_CACHED_MAGIC:
if (!silent) {
if (!no_cache_notice) {
zend_debug_alloc_output("Cached (allocated on %s:%d, %d bytes)\n", p->filename, p->lineno, p->size);
had_problems = 1;
}
} else {
if (!no_cache_notice) {
return _mem_block_check(ptr, 0 ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
}
}
break;
default:
if (!silent) {
zend_debug_alloc_output("Overrun (magic=0x%0.8lX, expected=0x%0.8lX)\n", p->magic, MEM_BLOCK_START_MAGIC);
} else {
return _mem_block_check(ptr, 0 ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
}
had_problems = 1;
valid_beginning = 0;
break;
}
memcpy(&end_magic, (((char *) p)+sizeof(zend_mem_header)+MEM_HEADER_PADDING+p->size), sizeof(long));
if (valid_beginning && (end_magic != MEM_BLOCK_END_MAGIC)) {
char *overflow_ptr, *magic_ptr=(char *) &mem_block_end_magic;
int overflows=0;
long 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<(int)sizeof(long); i++) {
if (overflow_ptr[i]!=magic_ptr[i]) {
overflows++;
}
}
zend_debug_alloc_output("%10s\t", "End:");
zend_debug_alloc_output("Overflown (magic=0x%0.8lX instead of 0x%0.8lX)\n", end_magic, MEM_BLOCK_END_MAGIC);
zend_debug_alloc_output("%10s\t","");
if (overflows>=(int)sizeof(long)) {
zend_debug_alloc_output("At least %d bytes overflown\n", sizeof(long));
} else {
zend_debug_alloc_output("%d byte(s) overflown\n", overflows);
}
} else if (!silent) {
zend_debug_alloc_output("%10s\t", "End:");
if (valid_beginning) {
zend_debug_alloc_output("OK\n");
} else {
zend_debug_alloc_output("Unknown\n");
}
}
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)
{
zend_mem_header *p;
int errors=0;
TSRMLS_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(zend_mem_header) + MEM_HEADER_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
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* indent-tabs-mode: t
* End:
*/
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