/Zend/zend_alloc.c
C | 2659 lines | 2208 code | 366 blank | 85 comment | 457 complexity | 17886f0447980a3fe71ed7176502f53f MD5 | raw file
Possible License(s): MPL-2.0-no-copyleft-exception, LGPL-2.1, BSD-3-Clause
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- /*
- +----------------------------------------------------------------------+
- | Zend Engine |
- +----------------------------------------------------------------------+
- | Copyright (c) 1998-2011 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> |
- | Dmitry Stogov <dmitry@zend.com> |
- +----------------------------------------------------------------------+
- */
- /* $Id: zend_alloc.c 308090 2011-02-07 10:25:34Z pajoye $ */
- #include "zend.h"
- #include "zend_alloc.h"
- #include "zend_globals.h"
- #include "zend_operators.h"
- #ifdef HAVE_SIGNAL_H
- # include <signal.h>
- #endif
- #ifdef HAVE_UNISTD_H
- # include <unistd.h>
- #endif
- #ifdef ZEND_WIN32
- # include <wincrypt.h>
- # include <process.h>
- #endif
- #ifndef ZEND_MM_HEAP_PROTECTION
- # define ZEND_MM_HEAP_PROTECTION ZEND_DEBUG
- #endif
- #ifndef ZEND_MM_SAFE_UNLINKING
- # define ZEND_MM_SAFE_UNLINKING 1
- #endif
- #ifndef ZEND_MM_COOKIES
- # define ZEND_MM_COOKIES ZEND_DEBUG
- #endif
- #ifdef _WIN64
- # define PTR_FMT "0x%0.16I64x"
- /*
- #elif sizeof(long) == 8
- # define PTR_FMT "0x%0.16lx"
- */
- #else
- # define PTR_FMT "0x%0.8lx"
- #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
- }
- #endif
- #if (defined (__GNUC__) && __GNUC__ > 2 ) && !defined(__INTEL_COMPILER) && !defined(DARWIN) && !defined(__hpux) && !defined(_AIX)
- static void zend_mm_panic(const char *message) __attribute__ ((noreturn));
- #endif
- static void zend_mm_panic(const char *message)
- {
- fprintf(stderr, "%s\n", message);
- /* See http://support.microsoft.com/kb/190351 */
- #ifdef PHP_WIN32
- fflush(stderr);
- #endif
- #if ZEND_DEBUG && defined(HAVE_KILL) && defined(HAVE_GETPID)
- kill(getpid(), SIGSEGV);
- #endif
- exit(1);
- }
- /*******************/
- /* Storage Manager */
- /*******************/
- #ifdef ZEND_WIN32
- # define HAVE_MEM_WIN32 /* use VirtualAlloc() to allocate memory */
- #endif
- #define HAVE_MEM_MALLOC /* use malloc() to allocate segments */
- #include <sys/types.h>
- #include <sys/stat.h>
- #if HAVE_LIMITS_H
- #include <limits.h>
- #endif
- #include <fcntl.h>
- #include <errno.h>
- #if defined(HAVE_MEM_MMAP_ANON) || defined(HAVE_MEM_MMAP_ZERO)
- # ifdef HAVE_MREMAP
- # ifndef _GNU_SOURCE
- # define _GNU_SOURCE
- # endif
- # ifndef __USE_GNU
- # define __USE_GNU
- # endif
- # endif
- # include <sys/mman.h>
- # ifndef MAP_ANON
- # ifdef MAP_ANONYMOUS
- # define MAP_ANON MAP_ANONYMOUS
- # endif
- # endif
- # ifndef MREMAP_MAYMOVE
- # define MREMAP_MAYMOVE 0
- # endif
- # ifndef MAP_FAILED
- # define MAP_FAILED ((void*)-1)
- # endif
- #endif
- static zend_mm_storage* zend_mm_mem_dummy_init(void *params)
- {
- return malloc(sizeof(zend_mm_storage));
- }
- static void zend_mm_mem_dummy_dtor(zend_mm_storage *storage)
- {
- free(storage);
- }
- static void zend_mm_mem_dummy_compact(zend_mm_storage *storage)
- {
- }
- #if defined(HAVE_MEM_MMAP_ANON) || defined(HAVE_MEM_MMAP_ZERO)
- static zend_mm_segment* zend_mm_mem_mmap_realloc(zend_mm_storage *storage, zend_mm_segment* segment, size_t size)
- {
- zend_mm_segment *ret;
- #ifdef HAVE_MREMAP
- #if defined(__NetBSD__)
- /* NetBSD 5 supports mremap but takes an extra newp argument */
- ret = (zend_mm_segment*)mremap(segment, segment->size, segment, size, MREMAP_MAYMOVE);
- #else
- ret = (zend_mm_segment*)mremap(segment, segment->size, size, MREMAP_MAYMOVE);
- #endif
- if (ret == MAP_FAILED) {
- #endif
- ret = storage->handlers->_alloc(storage, size);
- if (ret) {
- memcpy(ret, segment, size > segment->size ? segment->size : size);
- storage->handlers->_free(storage, segment);
- }
- #ifdef HAVE_MREMAP
- }
- #endif
- return ret;
- }
- static void zend_mm_mem_mmap_free(zend_mm_storage *storage, zend_mm_segment* segment)
- {
- munmap((void*)segment, segment->size);
- }
- #endif
- #ifdef HAVE_MEM_MMAP_ANON
- static zend_mm_segment* zend_mm_mem_mmap_anon_alloc(zend_mm_storage *storage, size_t size)
- {
- zend_mm_segment *ret = (zend_mm_segment*)mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON, -1, 0);
- if (ret == MAP_FAILED) {
- ret = NULL;
- }
- return ret;
- }
- # define ZEND_MM_MEM_MMAP_ANON_DSC {"mmap_anon", zend_mm_mem_dummy_init, zend_mm_mem_dummy_dtor, zend_mm_mem_dummy_compact, zend_mm_mem_mmap_anon_alloc, zend_mm_mem_mmap_realloc, zend_mm_mem_mmap_free}
- #endif
- #ifdef HAVE_MEM_MMAP_ZERO
- static int zend_mm_dev_zero_fd = -1;
- static zend_mm_storage* zend_mm_mem_mmap_zero_init(void *params)
- {
- if (zend_mm_dev_zero_fd != -1) {
- zend_mm_dev_zero_fd = open("/dev/zero", O_RDWR, S_IRUSR | S_IWUSR);
- }
- if (zend_mm_dev_zero_fd >= 0) {
- return malloc(sizeof(zend_mm_storage));
- } else {
- return NULL;
- }
- }
- static void zend_mm_mem_mmap_zero_dtor(zend_mm_storage *storage)
- {
- close(zend_mm_dev_zero_fd);
- free(storage);
- }
- static zend_mm_segment* zend_mm_mem_mmap_zero_alloc(zend_mm_storage *storage, size_t size)
- {
- zend_mm_segment *ret = (zend_mm_segment*)mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_PRIVATE, zend_mm_dev_zero_fd, 0);
- if (ret == MAP_FAILED) {
- ret = NULL;
- }
- return ret;
- }
- # define ZEND_MM_MEM_MMAP_ZERO_DSC {"mmap_zero", zend_mm_mem_mmap_zero_init, zend_mm_mem_mmap_zero_dtor, zend_mm_mem_dummy_compact, zend_mm_mem_mmap_zero_alloc, zend_mm_mem_mmap_realloc, zend_mm_mem_mmap_free}
- #endif
- #ifdef HAVE_MEM_WIN32
- static zend_mm_storage* zend_mm_mem_win32_init(void *params)
- {
- HANDLE heap = HeapCreate(HEAP_NO_SERIALIZE, 0, 0);
- zend_mm_storage* storage;
- if (heap == NULL) {
- return NULL;
- }
- storage = (zend_mm_storage*)malloc(sizeof(zend_mm_storage));
- if (storage == NULL) {
- HeapDestroy(heap);
- return NULL;
- }
- storage->data = (void*) heap;
- return storage;
- }
- static void zend_mm_mem_win32_dtor(zend_mm_storage *storage)
- {
- HeapDestroy((HANDLE)storage->data);
- free(storage);
- }
- static void zend_mm_mem_win32_compact(zend_mm_storage *storage)
- {
- HeapDestroy((HANDLE)storage->data);
- storage->data = (void*)HeapCreate(HEAP_NO_SERIALIZE, 0, 0);
- }
- static zend_mm_segment* zend_mm_mem_win32_alloc(zend_mm_storage *storage, size_t size)
- {
- return (zend_mm_segment*) HeapAlloc((HANDLE)storage->data, HEAP_NO_SERIALIZE, size);
- }
- static void zend_mm_mem_win32_free(zend_mm_storage *storage, zend_mm_segment* segment)
- {
- HeapFree((HANDLE)storage->data, HEAP_NO_SERIALIZE, segment);
- }
- static zend_mm_segment* zend_mm_mem_win32_realloc(zend_mm_storage *storage, zend_mm_segment* segment, size_t size)
- {
- return (zend_mm_segment*) HeapReAlloc((HANDLE)storage->data, HEAP_NO_SERIALIZE, segment, size);
- }
- # define ZEND_MM_MEM_WIN32_DSC {"win32", zend_mm_mem_win32_init, zend_mm_mem_win32_dtor, zend_mm_mem_win32_compact, zend_mm_mem_win32_alloc, zend_mm_mem_win32_realloc, zend_mm_mem_win32_free}
- #endif
- #ifdef HAVE_MEM_MALLOC
- static zend_mm_segment* zend_mm_mem_malloc_alloc(zend_mm_storage *storage, size_t size)
- {
- return (zend_mm_segment*)malloc(size);
- }
- static zend_mm_segment* zend_mm_mem_malloc_realloc(zend_mm_storage *storage, zend_mm_segment *ptr, size_t size)
- {
- return (zend_mm_segment*)realloc(ptr, size);
- }
- static void zend_mm_mem_malloc_free(zend_mm_storage *storage, zend_mm_segment *ptr)
- {
- free(ptr);
- }
- # define ZEND_MM_MEM_MALLOC_DSC {"malloc", zend_mm_mem_dummy_init, zend_mm_mem_dummy_dtor, zend_mm_mem_dummy_compact, zend_mm_mem_malloc_alloc, zend_mm_mem_malloc_realloc, zend_mm_mem_malloc_free}
- #endif
- static const zend_mm_mem_handlers mem_handlers[] = {
- #ifdef HAVE_MEM_WIN32
- ZEND_MM_MEM_WIN32_DSC,
- #endif
- #ifdef HAVE_MEM_MALLOC
- ZEND_MM_MEM_MALLOC_DSC,
- #endif
- #ifdef HAVE_MEM_MMAP_ANON
- ZEND_MM_MEM_MMAP_ANON_DSC,
- #endif
- #ifdef HAVE_MEM_MMAP_ZERO
- ZEND_MM_MEM_MMAP_ZERO_DSC,
- #endif
- {NULL, NULL, NULL, NULL, NULL, NULL}
- };
- # define ZEND_MM_STORAGE_DTOR() heap->storage->handlers->dtor(heap->storage)
- # define ZEND_MM_STORAGE_ALLOC(size) heap->storage->handlers->_alloc(heap->storage, size)
- # define ZEND_MM_STORAGE_REALLOC(ptr, size) heap->storage->handlers->_realloc(heap->storage, ptr, size)
- # define ZEND_MM_STORAGE_FREE(ptr) heap->storage->handlers->_free(heap->storage, ptr)
- /****************/
- /* Heap Manager */
- /****************/
- #define MEM_BLOCK_VALID 0x7312F8DC
- #define MEM_BLOCK_FREED 0x99954317
- #define MEM_BLOCK_CACHED 0xFB8277DC
- #define MEM_BLOCK_GUARD 0x2A8FCC84
- #define MEM_BLOCK_LEAK 0x6C5E8F2D
- /* mm block type */
- typedef struct _zend_mm_block_info {
- #if ZEND_MM_COOKIES
- size_t _cookie;
- #endif
- size_t _size;
- size_t _prev;
- } zend_mm_block_info;
- #if ZEND_DEBUG
- typedef struct _zend_mm_debug_info {
- char *filename;
- uint lineno;
- char *orig_filename;
- uint orig_lineno;
- size_t size;
- #if ZEND_MM_HEAP_PROTECTION
- unsigned int start_magic;
- #endif
- } zend_mm_debug_info;
- #elif ZEND_MM_HEAP_PROTECTION
- typedef struct _zend_mm_debug_info {
- size_t size;
- unsigned int start_magic;
- } zend_mm_debug_info;
- #endif
- typedef struct _zend_mm_block {
- zend_mm_block_info info;
- #if ZEND_DEBUG
- unsigned int magic;
- # ifdef ZTS
- THREAD_T thread_id;
- # endif
- zend_mm_debug_info debug;
- #elif ZEND_MM_HEAP_PROTECTION
- zend_mm_debug_info debug;
- #endif
- } zend_mm_block;
- typedef struct _zend_mm_small_free_block {
- zend_mm_block_info info;
- #if ZEND_DEBUG
- unsigned int magic;
- # ifdef ZTS
- THREAD_T thread_id;
- # endif
- #endif
- struct _zend_mm_free_block *prev_free_block;
- struct _zend_mm_free_block *next_free_block;
- } zend_mm_small_free_block;
- typedef struct _zend_mm_free_block {
- zend_mm_block_info info;
- #if ZEND_DEBUG
- unsigned int magic;
- # ifdef ZTS
- THREAD_T thread_id;
- # endif
- #endif
- struct _zend_mm_free_block *prev_free_block;
- struct _zend_mm_free_block *next_free_block;
- struct _zend_mm_free_block **parent;
- struct _zend_mm_free_block *child[2];
- } zend_mm_free_block;
- #define ZEND_MM_NUM_BUCKETS (sizeof(size_t) << 3)
- #define ZEND_MM_CACHE 1
- #define ZEND_MM_CACHE_SIZE (ZEND_MM_NUM_BUCKETS * 4 * 1024)
- #ifndef ZEND_MM_CACHE_STAT
- # define ZEND_MM_CACHE_STAT 0
- #endif
- struct _zend_mm_heap {
- int use_zend_alloc;
- void *(*_malloc)(size_t);
- void (*_free)(void*);
- void *(*_realloc)(void*, size_t);
- size_t free_bitmap;
- size_t large_free_bitmap;
- size_t block_size;
- size_t compact_size;
- zend_mm_segment *segments_list;
- zend_mm_storage *storage;
- size_t real_size;
- size_t real_peak;
- size_t limit;
- size_t size;
- size_t peak;
- size_t reserve_size;
- void *reserve;
- int overflow;
- int internal;
- #if ZEND_MM_CACHE
- unsigned int cached;
- zend_mm_free_block *cache[ZEND_MM_NUM_BUCKETS];
- #endif
- zend_mm_free_block *free_buckets[ZEND_MM_NUM_BUCKETS*2];
- zend_mm_free_block *large_free_buckets[ZEND_MM_NUM_BUCKETS];
- zend_mm_free_block *rest_buckets[2];
- #if ZEND_MM_CACHE_STAT
- struct {
- int count;
- int max_count;
- int hit;
- int miss;
- } cache_stat[ZEND_MM_NUM_BUCKETS+1];
- #endif
- };
- #define ZEND_MM_SMALL_FREE_BUCKET(heap, index) \
- (zend_mm_free_block*) ((char*)&heap->free_buckets[index * 2] + \
- sizeof(zend_mm_free_block*) * 2 - \
- sizeof(zend_mm_small_free_block))
- #define ZEND_MM_REST_BUCKET(heap) \
- (zend_mm_free_block*)((char*)&heap->rest_buckets[0] + \
- sizeof(zend_mm_free_block*) * 2 - \
- sizeof(zend_mm_small_free_block))
- #if ZEND_MM_COOKIES
- static unsigned int _zend_mm_cookie = 0;
- # define ZEND_MM_COOKIE(block) \
- (((size_t)(block)) ^ _zend_mm_cookie)
- # define ZEND_MM_SET_COOKIE(block) \
- (block)->info._cookie = ZEND_MM_COOKIE(block)
- # define ZEND_MM_CHECK_COOKIE(block) \
- if (UNEXPECTED((block)->info._cookie != ZEND_MM_COOKIE(block))) { \
- zend_mm_panic("zend_mm_heap corrupted"); \
- }
- #else
- # define ZEND_MM_SET_COOKIE(block)
- # define ZEND_MM_CHECK_COOKIE(block)
- #endif
- /* Default memory segment size */
- #define ZEND_MM_SEG_SIZE (256 * 1024)
- /* Reserved space for error reporting in case of memory overflow */
- #define ZEND_MM_RESERVE_SIZE (8*1024)
- #ifdef _WIN64
- # define ZEND_MM_LONG_CONST(x) (x##i64)
- #else
- # define ZEND_MM_LONG_CONST(x) (x##L)
- #endif
- #define ZEND_MM_TYPE_MASK ZEND_MM_LONG_CONST(0x3)
- #define ZEND_MM_FREE_BLOCK ZEND_MM_LONG_CONST(0x0)
- #define ZEND_MM_USED_BLOCK ZEND_MM_LONG_CONST(0x1)
- #define ZEND_MM_GUARD_BLOCK ZEND_MM_LONG_CONST(0x3)
- #define ZEND_MM_BLOCK(b, type, size) do { \
- size_t _size = (size); \
- (b)->info._size = (type) | _size; \
- ZEND_MM_BLOCK_AT(b, _size)->info._prev = (type) | _size; \
- ZEND_MM_SET_COOKIE(b); \
- } while (0);
- #define ZEND_MM_LAST_BLOCK(b) do { \
- (b)->info._size = ZEND_MM_GUARD_BLOCK | ZEND_MM_ALIGNED_HEADER_SIZE; \
- ZEND_MM_SET_MAGIC(b, MEM_BLOCK_GUARD); \
- } while (0);
- #define ZEND_MM_BLOCK_SIZE(b) ((b)->info._size & ~ZEND_MM_TYPE_MASK)
- #define ZEND_MM_IS_FREE_BLOCK(b) (!((b)->info._size & ZEND_MM_USED_BLOCK))
- #define ZEND_MM_IS_USED_BLOCK(b) ((b)->info._size & ZEND_MM_USED_BLOCK)
- #define ZEND_MM_IS_GUARD_BLOCK(b) (((b)->info._size & ZEND_MM_TYPE_MASK) == ZEND_MM_GUARD_BLOCK)
- #define ZEND_MM_NEXT_BLOCK(b) ZEND_MM_BLOCK_AT(b, ZEND_MM_BLOCK_SIZE(b))
- #define ZEND_MM_PREV_BLOCK(b) ZEND_MM_BLOCK_AT(b, -(int)((b)->info._prev & ~ZEND_MM_TYPE_MASK))
- #define ZEND_MM_PREV_BLOCK_IS_FREE(b) (!((b)->info._prev & ZEND_MM_USED_BLOCK))
- #define ZEND_MM_MARK_FIRST_BLOCK(b) ((b)->info._prev = ZEND_MM_GUARD_BLOCK)
- #define ZEND_MM_IS_FIRST_BLOCK(b) ((b)->info._prev == ZEND_MM_GUARD_BLOCK)
- /* optimized access */
- #define ZEND_MM_FREE_BLOCK_SIZE(b) (b)->info._size
- /* Aligned header size */
- #define ZEND_MM_ALIGNED_HEADER_SIZE ZEND_MM_ALIGNED_SIZE(sizeof(zend_mm_block))
- #define ZEND_MM_ALIGNED_FREE_HEADER_SIZE ZEND_MM_ALIGNED_SIZE(sizeof(zend_mm_small_free_block))
- #define ZEND_MM_MIN_ALLOC_BLOCK_SIZE ZEND_MM_ALIGNED_SIZE(ZEND_MM_ALIGNED_HEADER_SIZE + END_MAGIC_SIZE)
- #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)
- #define ZEND_MM_ALIGNED_SEGMENT_SIZE ZEND_MM_ALIGNED_SIZE(sizeof(zend_mm_segment))
- #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)
- #define ZEND_MM_MAX_SMALL_SIZE ((ZEND_MM_NUM_BUCKETS<<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))
- #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) EXPECTED(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) \
- (((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 { \
- char *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_BLOCK_AT(block, ZEND_MM_FREE_BLOCK_SIZE(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"); \
- }
- #define ZEND_MM_CHECK_TREE(block) \
- if (UNEXPECTED(*((block)->parent) != (block))) { \
- zend_mm_panic("zend_mm_heap corrupted"); \
- }
- #else
- # define ZEND_MM_CHECK_BLOCK_LINKAGE(block)
- # define ZEND_MM_CHECK_TREE(block)
- #endif
- #define ZEND_MM_LARGE_BUCKET_INDEX(S) zend_mm_high_bit(S)
- 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_free_int(zend_mm_heap *heap, void *p ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC);
- static void *_zend_mm_realloc_int(zend_mm_heap *heap, void *p, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC);
- static inline unsigned int zend_mm_high_bit(size_t _size)
- {
- #if defined(__GNUC__) && defined(i386)
- unsigned int n;
- __asm__("bsrl %1,%0\n\t" : "=r" (n) : "rm" (_size));
- return n;
- #elif defined(__GNUC__) && defined(__x86_64__)
- unsigned long n;
- __asm__("bsrq %1,%0\n\t" : "=r" (n) : "rm" (_size));
- return (unsigned int)n;
- #elif defined(_MSC_VER) && defined(_M_IX86)
- __asm {
- bsr eax, _size
- }
- #else
- unsigned int n = 0;
- while (_size != 0) {
- _size = _size >> 1;
- n++;
- }
- return n-1;
- #endif
- }
- static inline unsigned int zend_mm_low_bit(size_t _size)
- {
- #if defined(__GNUC__) && defined(i386)
- unsigned int n;
- __asm__("bsfl %1,%0\n\t" : "=r" (n) : "rm" (_size));
- return n;
- #elif defined(__GNUC__) && defined(__x86_64__)
- unsigned long n;
- __asm__("bsfq %1,%0\n\t" : "=r" (n) : "rm" (_size));
- return (unsigned int)n;
- #elif defined(_MSC_VER) && defined(_M_IX86)
- __asm {
- bsf eax, _size
- }
- #else
- static const int offset[16] = {4,0,1,0,2,0,1,0,3,0,1,0,2,0,1,0};
- unsigned int n;
- unsigned int index = 0;
- n = offset[_size & 15];
- while (n == 4) {
- _size >>= 4;
- index += n;
- n = offset[_size & 15];
- }
- return index + n;
- #endif
- }
- static inline void zend_mm_add_to_rest_list(zend_mm_heap *heap, zend_mm_free_block *mm_block)
- {
- zend_mm_free_block *prev, *next;
- ZEND_MM_SET_MAGIC(mm_block, MEM_BLOCK_FREED);
- if (!ZEND_MM_SMALL_SIZE(ZEND_MM_FREE_BLOCK_SIZE(mm_block))) {
- mm_block->parent = NULL;
- }
- prev = heap->rest_buckets[0];
- next = prev->next_free_block;
- mm_block->prev_free_block = prev;
- mm_block->next_free_block = next;
- prev->next_free_block = next->prev_free_block = mm_block;
- }
- static inline void zend_mm_add_to_free_list(zend_mm_heap *heap, zend_mm_free_block *mm_block)
- {
- size_t size;
- size_t index;
- ZEND_MM_SET_MAGIC(mm_block, MEM_BLOCK_FREED);
- size = ZEND_MM_FREE_BLOCK_SIZE(mm_block);
- if (EXPECTED(!ZEND_MM_SMALL_SIZE(size))) {
- zend_mm_free_block **p;
- index = ZEND_MM_LARGE_BUCKET_INDEX(size);
- p = &heap->large_free_buckets[index];
- mm_block->child[0] = mm_block->child[1] = NULL;
- if (!*p) {
- *p = mm_block;
- mm_block->parent = p;
- mm_block->prev_free_block = mm_block->next_free_block = mm_block;
- heap->large_free_bitmap |= (ZEND_MM_LONG_CONST(1) << index);
- } else {
- size_t m;
- for (m = size << (ZEND_MM_NUM_BUCKETS - index); ; m <<= 1) {
- zend_mm_free_block *prev = *p;
- if (ZEND_MM_FREE_BLOCK_SIZE(prev) != size) {
- p = &prev->child[(m >> (ZEND_MM_NUM_BUCKETS-1)) & 1];
- if (!*p) {
- *p = mm_block;
- mm_block->parent = p;
- mm_block->prev_free_block = mm_block->next_free_block = mm_block;
- break;
- }
- } else {
- zend_mm_free_block *next = prev->next_free_block;
- prev->next_free_block = next->prev_free_block = mm_block;
- mm_block->next_free_block = next;
- mm_block->prev_free_block = prev;
- mm_block->parent = NULL;
- break;
- }
- }
- }
- } else {
- zend_mm_free_block *prev, *next;
- index = ZEND_MM_BUCKET_INDEX(size);
- prev = ZEND_MM_SMALL_FREE_BUCKET(heap, index);
- if (prev->prev_free_block == prev) {
- heap->free_bitmap |= (ZEND_MM_LONG_CONST(1) << index);
- }
- next = prev->next_free_block;
- mm_block->prev_free_block = prev;
- mm_block->next_free_block = next;
- prev->next_free_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 = mm_block->prev_free_block;
- zend_mm_free_block *next = mm_block->next_free_block;
- ZEND_MM_CHECK_MAGIC(mm_block, MEM_BLOCK_FREED);
- if (EXPECTED(prev == mm_block)) {
- zend_mm_free_block **rp, **cp;
- #if ZEND_MM_SAFE_UNLINKING
- if (UNEXPECTED(next != mm_block)) {
- zend_mm_panic("zend_mm_heap corrupted");
- }
- #endif
- rp = &mm_block->child[mm_block->child[1] != NULL];
- prev = *rp;
- if (EXPECTED(prev == NULL)) {
- size_t index = ZEND_MM_LARGE_BUCKET_INDEX(ZEND_MM_FREE_BLOCK_SIZE(mm_block));
- ZEND_MM_CHECK_TREE(mm_block);
- *mm_block->parent = NULL;
- if (mm_block->parent == &heap->large_free_buckets[index]) {
- heap->large_free_bitmap &= ~(ZEND_MM_LONG_CONST(1) << index);
- }
- } else {
- while (*(cp = &(prev->child[prev->child[1] != NULL])) != NULL) {
- prev = *cp;
- rp = cp;
- }
- *rp = NULL;
- subst_block:
- ZEND_MM_CHECK_TREE(mm_block);
- *mm_block->parent = prev;
- prev->parent = mm_block->parent;
- if ((prev->child[0] = mm_block->child[0])) {
- ZEND_MM_CHECK_TREE(prev->child[0]);
- prev->child[0]->parent = &prev->child[0];
- }
- if ((prev->child[1] = mm_block->child[1])) {
- ZEND_MM_CHECK_TREE(prev->child[1]);
- prev->child[1]->parent = &prev->child[1];
- }
- }
- } else {
- #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 (EXPECTED(ZEND_MM_SMALL_SIZE(ZEND_MM_FREE_BLOCK_SIZE(mm_block)))) {
- if (EXPECTED(prev == next)) {
- size_t index = ZEND_MM_BUCKET_INDEX(ZEND_MM_FREE_BLOCK_SIZE(mm_block));
- if (EXPECTED(heap->free_buckets[index*2] == heap->free_buckets[index*2+1])) {
- heap->free_bitmap &= ~(ZEND_MM_LONG_CONST(1) << index);
- }
- }
- } else if (UNEXPECTED(mm_block->parent != NULL)) {
- goto subst_block;
- }
- }
- }
- static inline void zend_mm_init(zend_mm_heap *heap)
- {
- zend_mm_free_block* p;
- int i;
- heap->free_bitmap = 0;
- heap->large_free_bitmap = 0;
- #if ZEND_MM_CACHE
- heap->cached = 0;
- memset(heap->cache, 0, sizeof(heap->cache));
- #endif
- #if ZEND_MM_CACHE_STAT
- for (i = 0; i < ZEND_MM_NUM_BUCKETS; i++) {
- heap->cache_stat[i].count = 0;
- }
- #endif
- p = ZEND_MM_SMALL_FREE_BUCKET(heap, 0);
- for (i = 0; i < ZEND_MM_NUM_BUCKETS; i++) {
- p->next_free_block = p;
- p->prev_free_block = p;
- p = (zend_mm_free_block*)((char*)p + sizeof(zend_mm_free_block*) * 2);
- heap->large_free_buckets[i] = NULL;
- }
- heap->rest_buckets[0] = heap->rest_buckets[1] = ZEND_MM_REST_BUCKET(heap);
- }
- static void zend_mm_del_segment(zend_mm_heap *heap, zend_mm_segment *segment)
- {
- zend_mm_segment **p = &heap->segments_list;
- while (*p != segment) {
- p = &(*p)->next_segment;
- }
- *p = segment->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;
- #if ZEND_MM_CACHE_STAT
- heap->cache_stat[i].count = 0;
- #endif
- }
- }
- }
- #endif
- #if ZEND_MM_HEAP_PROTECTION || ZEND_MM_COOKIES
- static void zend_mm_random(unsigned char *buf, size_t size) /* {{{ */
- {
- size_t i = 0;
- unsigned char t;
- #ifdef ZEND_WIN32
- HCRYPTPROV hCryptProv;
- int has_context = 0;
- if (!CryptAcquireContext(&hCryptProv, NULL, NULL, PROV_RSA_FULL, 0)) {
- /* Could mean that the key container does not exist, let try
- again by asking for a new one */
- if (GetLastError() == NTE_BAD_KEYSET) {
- if (CryptAcquireContext(&hCryptProv, NULL, NULL, PROV_RSA_FULL, CRYPT_NEWKEYSET)) {
- has_context = 1;
- }
- }
- } else {
- has_context = 1;
- }
- if (has_context) {
- 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;
- }
- }
- /* }}} */
- #endif
- /* 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, size_t reserve_size, int internal, 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
- if (zend_mm_low_bit(block_size) != zend_mm_high_bit(block_size)) {
- fprintf(stderr, "'block_size' must be a power of two\n");
- /* See http://support.microsoft.com/kb/190351 */
- #ifdef PHP_WIN32
- fflush(stderr);
- #endif
- exit(255);
- }
- storage = handlers->init(params);
- if (!storage) {
- fprintf(stderr, "Cannot initialize zend_mm storage [%s]\n", handlers->name);
- /* See http://support.microsoft.com/kb/190351 */
- #ifdef PHP_WIN32
- fflush(stderr);
- #endif
- exit(255);
- }
- storage->handlers = handlers;
- heap = malloc(sizeof(struct _zend_mm_heap));
- if (heap == NULL) {
- fprintf(stderr, "Cannot allocate heap for zend_mm storage [%s]\n", handlers->name);
- #ifdef PHP_WIN32
- fflush(stderr);
- #endif
- exit(255);
- }
- heap->storage = storage;
- heap->block_size = block_size;
- heap->compact_size = 0;
- heap->segments_list = NULL;
- zend_mm_init(heap);
- # if ZEND_MM_CACHE_STAT
- memset(heap->cache_stat, 0, sizeof(heap->cache_stat));
- # endif
- heap->use_zend_alloc = 1;
- heap->real_size = 0;
- heap->overflow = 0;
- heap->real_peak = 0;
- heap->limit = ZEND_MM_LONG_CONST(1)<<(ZEND_MM_NUM_BUCKETS-2);
- heap->size = 0;
- heap->peak = 0;
- heap->internal = internal;
- heap->reserve = NULL;
- heap->reserve_size = reserve_size;
- if (reserve_size > 0) {
- heap->reserve = _zend_mm_alloc_int(heap, reserve_size ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC);
- }
- if (internal) {
- int i;
- zend_mm_free_block *p, *q, *orig;
- zend_mm_heap *mm_heap = _zend_mm_alloc_int(heap, sizeof(zend_mm_heap) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC);
- *mm_heap = *heap;
- p = ZEND_MM_SMALL_FREE_BUCKET(mm_heap, 0);
- orig = ZEND_MM_SMALL_FREE_BUCKET(heap, 0);
- for (i = 0; i < ZEND_MM_NUM_BUCKETS; i++) {
- q = p;
- while (q->prev_free_block != orig) {
- q = q->prev_free_block;
- }
- q->prev_free_block = p;
- q = p;
- while (q->next_free_block != orig) {
- q = q->next_free_block;
- }
- q->next_free_block = p;
- p = (zend_mm_free_block*)((char*)p + sizeof(zend_mm_free_block*) * 2);
- orig = (zend_mm_free_block*)((char*)orig + sizeof(zend_mm_free_block*) * 2);
- if (mm_heap->large_free_buckets[i]) {
- mm_heap->large_free_buckets[i]->parent = &mm_heap->large_free_buckets[i];
- }
- }
- mm_heap->rest_buckets[0] = mm_heap->rest_buckets[1] = ZEND_MM_REST_BUCKET(mm_heap);
- free(heap);
- heap = mm_heap;
- }
- 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;
- zend_mm_heap *heap;
- 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");
- /* See http://support.microsoft.com/kb/190351 */
- #ifdef PHP_WIN32
- fflush(stderr);
- #endif
- for (i = 0; mem_handlers[i].name; i++) {
- fprintf(stderr, " '%s'\n", mem_handlers[i].name);
- }
- /* See http://support.microsoft.com/kb/190351 */
- #ifdef PHP_WIN32
- fflush(stderr);
- #endif
- exit(255);
- }
- }
- handlers = &mem_handlers[i];
- tmp = getenv("ZEND_MM_SEG_SIZE");
- if (tmp) {
- seg_size = zend_atoi(tmp, 0);
- if (zend_mm_low_bit(seg_size) != zend_mm_high_bit(seg_size)) {
- fprintf(stderr, "ZEND_MM_SEG_SIZE must be a power of two\n");
- /* See http://support.microsoft.com/kb/190351 */
- #ifdef PHP_WIN32
- fflush(stderr);
- #endif
- exit(255);
- } else if (seg_size < ZEND_MM_ALIGNED_SEGMENT_SIZE + ZEND_MM_ALIGNED_HEADER_SIZE) {
- fprintf(stderr, "ZEND_MM_SEG_SIZE is too small\n");
- /* See http://support.microsoft.com/kb/190351 */
- #ifdef PHP_WIN32
- fflush(stderr);
- #endif
- exit(255);
- }
- } else {
- seg_size = ZEND_MM_SEG_SIZE;
- }
- heap = zend_mm_startup_ex(handlers, seg_size, ZEND_MM_RESERVE_SIZE, 0, NULL);
- if (heap) {
- tmp = getenv("ZEND_MM_COMPACT");
- if (tmp) {
- heap->compact_size = zend_atoi(tmp, 0);
- } else {
- heap->compact_size = 2 * 1024 * 1024;
- }
- }
- return heap;
- }
- #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 TSRMLS_DC)
- {
- 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 TSRMLS_CC);
- zend_message_dispatcher(ZMSG_MEMORY_LEAK_DETECTED, &leak TSRMLS_CC);
- repeated = zend_mm_find_leaks(segment, p);
- total += 1 + repeated;
- if (repeated) {
- zend_message_dispatcher(ZMSG_MEMORY_LEAK_REPEATED, (void *)(zend_uintptr_t)repeated TSRMLS_CC);
- }
- #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 TSRMLS_CC);
- }
- }
- 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) {
- TSRMLS_FETCH();
-
- zend_message_dispatcher(ZMSG_LOG_SCRIPT_NAME, NULL TSRMLS_CC);
- zend_debug_alloc_output("---------------------------------------\n");
- zend_debug_alloc_output("%s(%d) : Block "PTR_FMT" status:\n" ZEND_FILE_LINE_RELAY_CC, 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="PTR_FMT") != (next.prev="PTR_FMT"))\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="PTR_FMT") != (prev.size="PTR_FMT"))\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 {
- char *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 TSRMLS_DC)
- {
- zend_mm_storage *storage;
- zend_mm_segment *segment;
- zend_mm_segment *prev;
- int internal;
- if (heap->reserve) {
- #if ZEND_DEBUG
- if (!silent) {
- _zend_mm_free_int(heap, heap->reserve ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC);
- }
- #endif
- heap->reserve = NULL;
- }
- #if ZEND_MM_CACHE_STAT
- if (full_shutdown) {
- FILE *f;
- f = fopen("zend_mm.log", "w");
- if (f) {
- int i,j;
- size_t size, true_size, min_size, max_size;
- int hit = 0, miss = 0;
- fprintf(f, "\nidx min_size max_size true_size max_len hits misses\n");
- size = 0;
- while (1) {
- true_size = ZEND_MM_TRUE_SIZE(size);
- if (ZEND_MM_SMALL_SIZE(true_size)) {
- min_size = size;
- i = ZEND_MM_BUCKET_INDEX(true_size);
- size++;
- while (1) {
- true_size = ZEND_MM_TRUE_SIZE(size);
- if (ZEND_MM_SMALL_SIZE(true_size)) {
- j = ZEND_MM_BUCKET_INDEX(true_size);
- if (j > i) {
- max_size = size-1;
- break;
- }
- } else {
- max_size = size-1;
- break;
- }
- size++;
- }
- hit += heap->cache_stat[i].hit;
- miss += heap->cache_stat[i].miss;
- fprintf(f, "%2d %8d %8d %9d %8d %8d %8d\n", i, (int)min_size, (int)max_size, ZEND_MM_TRUE_SIZE(max_size), heap->cache_stat[i].max_count, heap->cache_stat[i].hit, heap->cache_stat[i].miss);
- } else {
- break;
- }
- }
- fprintf(f, " %8d %8d\n", hit, miss);
- fprintf(f, " %8d %8d\n", heap->cache_stat[ZEND_MM_NUM_BUCKETS].hit, heap->cache_stat[ZEND_MM_NUM_BUCKETS].miss);
- fclose(f);
- }
- }
- #endif
- #if ZEND_DEBUG
- if (!silent) {
- zend_mm_check_leaks(heap TSRMLS_CC);
- }
- #endif
- internal = heap->internal;
- storage = heap->storage;
- segment = heap->segments_list;
- while (segment) {
- prev = segment;
- segment = segment->next_segment;
- ZEND_MM_STORAGE_FREE(prev);
- }
- if (full_shutdown) {
- storage->handlers->dtor(storage);
- if (!internal) {
- free(heap);
- }
- } else {
- if (heap->compact_size &&
- heap->real_peak > heap->compact_size) {
- storage->handlers->compact(storage);
- }
- heap->segments_list = NULL;
- zend_mm_init(heap);
- heap->real_size = 0;
- heap->real_peak = 0;
- heap->size = 0;
- heap->peak = 0;
- if (heap->reserve_size) {
- heap->reserve = _zend_mm_alloc_int(heap, heap->reserve_size ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC);
- }
- 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_int(heap, heap->reserve ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC);
- 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_noreturn(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);
- }
- /* See http://support.microsoft.com/kb/190351 */
- #ifdef PHP_WIN32
- fflush(stderr);
- #endif
- } zend_end_try();
- } else {
- heap->overflow = 2;
- }
- zend_bailout();
- }
- static zend_mm_free_block *zend_mm_search_large_block(zend_mm_heap *heap, size_t true_size)
- {
- zend_mm_free_block *best_fit;
- size_t index = ZEND_MM_LARGE_BUCKET_INDEX(true_size);
- size_t bitmap = heap->large_free_bitmap >> index;
- zend_mm_free_block *p;
- if (bitmap == 0) {
- return NULL;
- }
- if (UNEXPECTED((bitmap & 1) != 0)) {
- /* Search for best "large" free block */
- zend_mm_free_block *rst = NULL;
- size_t m;
- size_t best_size = -1;
- best_fit = NULL;
- p = heap->large_free_buckets[index];
- for (m = true_size << (ZEND_MM_NUM_BUCKETS - index); ; m <<= 1) {
- if (UNEXPECTED(ZEND_MM_FREE_BLOCK_SIZE(p) == true_size)) {
- return p->next_free_block;
- } else if (ZEND_MM_FREE_BLOCK_SIZE(p) >= true_size &&
- ZEND_MM_FREE_BLOCK_SIZE(p) < best_size) {
- best_size = ZEND_MM_FREE_BLOCK_SIZE(p);
- best_fit = p;
- }
- if ((m & (ZEND_MM_LONG_CONST(1) << (ZEND_MM_NUM_BUCKETS-1))) == 0) {
- if (p->child[1]) {
- rst = p->child[1];
- }
- if (p->child[0]) {
- p = p->child[0];
- } else {
- break;
- }
- } else if (p->child[1]) {
- p = p->child[1];
- } else {
- break;
- }
- }
- for (p = rst; p; p = p->child[p->child[0] != NULL]) …
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