/* $Id$ */
+/*
+ * zend_alloc is designed to be a modern CPU cache friendly memory manager
+ * for PHP. Most ideas are taken from jemalloc and tcmalloc implementations.
+ *
+ * All allocations are split into 3 categories:
+ *
+ * Huge - the size is greater than CHUNK size (~2M by default), allocation is
+ * performed using mmap(). The result is aligned on 2M boundary.
+ *
+ * Large - a number of 4096K pages inside a CHUNK. Large blocks
+ * are always alligned on page boundary.
+ *
+ * Small - less than 3/4 of page size. Small sizes are rounded up to nearest
+ * greater predefined small size (there are 30 predefined sizes:
+ * 8, 16, 24, 32, ... 3072). Small blocks are allocated from
+ * RUNs. Each RUN is allocated as a single or few following pages.
+ * Allocation inside RUNs implemented using linked list of free
+ * elements. The result is aligned to 8 bytes.
+ *
+ * zend_alloc allocates memory from OS by CHUNKs, these CHUNKs and huge memory
+ * blocks are always aligned to CHUNK boundary. So it's very easy to determine
+ * the CHUNK owning the certain pointer. Regular CHUNKs reserve a single
+ * page at start for special purpose. It contains bitset of free pages,
+ * few bitset for available runs of predefined small sizes, map of pages that
+ * keeps information about usage of each page in this CHUNK, etc.
+ *
+ * zend_alloc provides familiar emalloc/efree/erealloc API, but in addition it
+ * provides specialized and optimized routines to allocate blocks of predefined
+ * sizes (e.g. emalloc_2(), emallc_4(), ..., emalloc_large(), etc)
+ * The library uses C preprocessor tricks that substitute calls to emalloc()
+ * with more specialized routines when the requested size is known.
+ */
+
#include "zend.h"
#include "zend_alloc.h"
#include "zend_globals.h"
# include <process.h>
#endif
-#ifndef ZEND_MM_HEAP_PROTECTION
-# define ZEND_MM_HEAP_PROTECTION ZEND_DEBUG
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#if HAVE_LIMITS_H
+#include <limits.h>
+#endif
+#include <fcntl.h>
+#include <errno.h>
+
+#ifndef _WIN32
+# 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
+# ifndef MAP_POPULATE
+# define MAP_POPULATE 0
+#endif
#endif
-#ifndef ZEND_MM_SAFE_UNLINKING
-# define ZEND_MM_SAFE_UNLINKING 1
+#ifndef ZEND_MM_STAT
+# define ZEND_MM_STAT 1 /* track current and peak memory usage */
+#endif
+#ifndef ZEND_MM_LIMIT
+# define ZEND_MM_LIMIT 1 /* support for user-defined memory limit */
+#endif
+#ifndef ZEND_MM_CUSTOM
+# define ZEND_MM_CUSTOM 1 /* support for custom memory allocator */
+ /* USE_ZEND_ALLOC=0 may switch to system malloc() */
+#endif
+#ifndef ZEND_MM_ERROR
+# define ZEND_MM_ERROR 1 /* report system errors */
#endif
-#ifndef ZEND_MM_COOKIES
-# define ZEND_MM_COOKIES ZEND_DEBUG
+#ifndef ZEND_MM_CHECK
+# define ZEND_MM_CHECK(condition, message) do { \
+ if (UNEXPECTED(!(condition))) { \
+ zend_mm_panic(message); \
+ } \
+ } while (0)
#endif
+typedef uint32_t zend_mm_page_info; /* 4-byte integer */
+typedef zend_ulong zend_mm_bitset; /* 4-byte or 8-byte integer */
+
+#define ZEND_MM_ALIGNED_OFFSET(size, alignment) \
+ (((size_t)(size)) & ((alignment) - 1))
+#define ZEND_MM_ALIGNED_BASE(size, alignment) \
+ (((size_t)(size)) & ~((alignment) - 1))
+#define ZEND_MM_ALIGNED_SIZE_EX(size, alignment) \
+ (((size_t)(size) + ((alignment) - 1)) & ~((alignment) - 1))
+#define ZEND_MM_SIZE_TO_NUM(size, alignment) \
+ (((size_t)(size) + ((alignment) - 1)) / (alignment))
+
+#define ZEND_MM_BITSET_LEN (sizeof(zend_mm_bitset) * 8) /* 32 or 64 */
+#define ZEND_MM_PAGE_MAP_LEN (ZEND_MM_PAGES / ZEND_MM_BITSET_LEN) /* 16 or 8 */
+
+typedef zend_mm_bitset zend_mm_page_map[ZEND_MM_PAGE_MAP_LEN]; /* 64B */
+
+#define ZEND_MM_IS_FRUN 0x00000000
+#define ZEND_MM_IS_LRUN 0x40000000
+#define ZEND_MM_IS_SRUN 0x80000000
+
+#define ZEND_MM_LRUN_PAGES_MASK 0x000003ff
+#define ZEND_MM_LRUN_PAGES_OFFSET 0
+
+#define ZEND_MM_SRUN_BIN_NUM_MASK 0x0000001f
+#define ZEND_MM_SRUN_BIN_NUM_OFFSET 0
+
+#define ZEND_MM_LRUN_PAGES(info) (((info) & ZEND_MM_LRUN_PAGES_MASK) >> ZEND_MM_LRUN_PAGES_OFFSET)
+#define ZEND_MM_SRUN_BIN_NUM(info) (((info) & ZEND_MM_SRUN_BIN_NUM_MASK) >> ZEND_MM_SRUN_BIN_NUM_OFFSET)
+
+#define ZEND_MM_FRUN() ZEND_MM_IS_FRUN
+#define ZEND_MM_LRUN(count) (ZEND_MM_IS_LRUN | ((count) << ZEND_MM_LRUN_PAGES_OFFSET))
+#define ZEND_MM_SRUN(bin_num) (ZEND_MM_IS_SRUN | ((bin_num) << ZEND_MM_SRUN_BIN_NUM_OFFSET))
+
+#define ZEND_MM_BINS 30
+
+typedef struct _zend_mm_page zend_mm_page;
+typedef struct _zend_mm_bin zend_mm_bin;
+typedef struct _zend_mm_free_slot zend_mm_free_slot;
+typedef struct _zend_mm_chunk zend_mm_chunk;
+typedef struct _zend_mm_huge_list zend_mm_huge_list;
+
#ifdef _WIN64
# define PTR_FMT "0x%0.16I64x"
-/*
-#elif sizeof(long) == 8
+#elif SIZEOF_LONG == 8
# define PTR_FMT "0x%0.16lx"
-*/
#else
# define PTR_FMT "0x%0.8lx"
#endif
+/*
+ * Memory is retrived from OS by chunks of fixed size 2MB.
+ * Inside chunk it's managed by pages of fixed size 4096B.
+ * So each chunk consists from 512 pages.
+ * The first page of each chunk is reseved for chunk header.
+ * It contains service information about all pages.
+ *
+ * free_pages - current number of free pages in this chunk
+ *
+ * free_tail - number of continuous free pages at the end of chunk
+ *
+ * free_map - bitset (a bit for each page). The bit is set if the corresponding
+ * page is allocated. Allocator for "lage sizes" may easily find a
+ * free page (or a continuous number of pages) searching for zero
+ * bits.
+ *
+ * map - contains service information for each page. (32-bits for each
+ * page).
+ * usage:
+ * (2 bits)
+ * FRUN - free page,
+ * LRUN - first page of "large" allocation
+ * SRUN - first page of a bin used for "small" allocation
+ *
+ * lrun_pages:
+ * (10 bits) number of allocated pages
+ *
+ * srun_bin_num:
+ * (5 bits) bin number (e.g. 0 for sizes 0-2, 1 for 3-4,
+ * 2 for 5-8, 3 for 9-16 etc) see zend_alloc_sizes.h
+ */
+
+struct _zend_mm_heap {
+#if ZEND_MM_CUSTOM
+ int use_custom_heap;
+#endif
+#if ZEND_MM_STAT
+ size_t size; /* current memory usage */
+ size_t peak; /* peak memory usage */
+#endif
+ zend_mm_free_slot *free_slot[ZEND_MM_BINS]; /* free lists for small sizes */
+#if ZEND_MM_STAT || ZEND_MM_LIMIT
+ size_t real_size; /* current size of allocated pages */
+#endif
+#if ZEND_MM_STAT
+ size_t real_peak; /* peak size of allocated pages */
+#endif
+#if ZEND_MM_LIMIT
+ size_t limit; /* memory limit */
+ int overflow; /* memory overflow flag */
+#endif
+
+ zend_mm_huge_list *huge_list; /* list of huge allocated blocks */
+
+ zend_mm_chunk *main_chunk;
+ zend_mm_chunk *cached_chunks; /* list of unused chunks */
+ int chunks_count; /* number of alocated chunks */
+ int peak_chunks_count; /* peak number of allocated chunks for current request */
+ int cached_chunks_count; /* number of cached chunks */
+ double avg_chunks_count; /* average number of chunks allocated per request */
+#if ZEND_MM_CUSTOM
+ void *(*_malloc)(size_t);
+ void (*_free)(void*);
+ void *(*_realloc)(void*, size_t);
+#endif
+};
+
+struct _zend_mm_chunk {
+ zend_mm_heap *heap;
+ zend_mm_chunk *next;
+ zend_mm_chunk *prev;
+ int free_pages; /* number of free pages */
+ int free_tail; /* number of free pages at the end of chunk */
+ int num;
+ char reserve[64 - (sizeof(void*) * 3 + sizeof(int) * 3)];
+ zend_mm_heap heap_slot; /* used only in main chunk */
+ zend_mm_page_map free_map; /* 512 bits or 64 bytes */
+ zend_mm_page_info map[ZEND_MM_PAGES]; /* 2 KB = 512 * 4 */
+};
+
+struct _zend_mm_page {
+ char bytes[ZEND_MM_PAGE_SIZE];
+};
+
+/*
+ * bin - is one or few continuous pages (up to 8) used for alocation of
+ * a particular "small size".
+ */
+struct _zend_mm_bin {
+ char bytes[ZEND_MM_PAGE_SIZE * 8];
+};
+
+#if ZEND_DEBUG
+typedef struct _zend_mm_debug_info {
+ size_t size;
+ const char *filename;
+ const char *orig_filename;
+ uint lineno;
+ uint orig_lineno;
+} zend_mm_debug_info;
+#endif
+
+struct _zend_mm_free_slot {
+ zend_mm_free_slot *next_free_slot;
+};
+
+struct _zend_mm_huge_list {
+ void *ptr;
+ size_t size;
+ zend_mm_huge_list *next;
+#if ZEND_DEBUG
+ zend_mm_debug_info dbg;
+#endif
+};
+
+#define ZEND_MM_PAGE_ADDR(chunk, page_num) \
+ ((void*)(((zend_mm_page*)(chunk)) + (page_num)))
+
+#define _BIN_DATA_SIZE(num, size, elements, pages, x, y) size,
+static const unsigned int bin_data_size[] = {
+ ZEND_MM_BINS_INFO(_BIN_DATA_SIZE, x, y)
+};
+
+#define _BIN_DATA_ELEMENTS(num, size, elements, pages, x, y) elements,
+static const int bin_elements[] = {
+ ZEND_MM_BINS_INFO(_BIN_DATA_ELEMENTS, x, y)
+};
+
+#define _BIN_DATA_PAGES(num, size, elements, pages, x, y) pages,
+static const int bin_pages[] = {
+ ZEND_MM_BINS_INFO(_BIN_DATA_PAGES, x, y)
+};
+
#if ZEND_DEBUG
void zend_debug_alloc_output(char *format, ...)
{
}
#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)
+static ZEND_NORETURN void zend_mm_panic(const char *message)
{
fprintf(stderr, "%s\n", message);
/* See http://support.microsoft.com/kb/190351 */
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
+static ZEND_NORETURN void zend_mm_safe_error(zend_mm_heap *heap,
+ const char *format,
+ size_t limit,
+#if ZEND_DEBUG
+ const char *filename,
+ uint lineno,
#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)
+ size_t size)
{
- free(storage);
-}
+ TSRMLS_FETCH();
-static void zend_mm_mem_dummy_compact(zend_mm_storage *storage)
-{
+ heap->overflow = 1;
+ zend_try {
+ zend_error_noreturn(E_ERROR,
+ format,
+ limit,
+#if ZEND_DEBUG
+ filename,
+ lineno,
+#endif
+ size);
+ } zend_catch {
+ } zend_end_try();
+ heap->overflow = 0;
+ zend_bailout();
+ exit(1);
}
-#if defined(HAVE_MEM_MMAP_ANON) || defined(HAVE_MEM_MMAP_ZERO)
+/*****************/
+/* OS Allocation */
+/*****************/
-static zend_mm_segment* zend_mm_mem_mmap_realloc(zend_mm_storage *storage, zend_mm_segment* segment, size_t size)
+static void *zend_mm_mmap_fixed(void *addr, 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);
+#ifdef _WIN32
+ return VirtualAlloc(addr, size, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);
#else
- ret = (zend_mm_segment*)mremap(segment, segment->size, size, MREMAP_MAYMOVE);
+ /* MAP_FIXED leads to discarding of the old mapping, so it can't be used. */
+ void *ptr = mmap(addr, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON /*| MAP_POPULATE | MAP_HUGETLB*/, -1, 0);
+
+ if (ptr == MAP_FAILED) {
+#if ZEND_MM_ERROR
+ fprintf(stderr, "\nmmap() failed: [%d] %s\n", errno, strerror(errno));
#endif
- if (ret == MAP_FAILED) {
+ return NULL;
+ } else if (ptr != addr) {
+ if (munmap(ptr, size) != 0) {
+#if ZEND_MM_ERROR
+ fprintf(stderr, "\nmunmap() failed: [%d] %s\n", errno, strerror(errno));
#endif
- 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
+ return NULL;
}
+ return ptr;
#endif
- return ret;
}
-static void zend_mm_mem_mmap_free(zend_mm_storage *storage, zend_mm_segment* segment)
+static void *zend_mm_mmap(size_t size)
{
- munmap((void*)segment, segment->size);
-}
+#ifdef _WIN32
+ void *ptr = VirtualAlloc(NULL, size, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);
+ if (ptr == NULL) {
+#if ZEND_MM_ERROR
+ fprintf(stderr, "\nVirtualAlloc() failed: [%d]\n", GetLastError());
#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 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}
+ return ptr;
+#else
+ void *ptr = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON /*| MAP_POPULATE | MAP_HUGETLB*/, -1, 0);
+ if (ptr == MAP_FAILED) {
+#if ZEND_MM_ERROR
+ fprintf(stderr, "\nmmap() failed: [%d] %s\n", errno, strerror(errno));
#endif
-
-#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;
}
+ return ptr;
+#endif
}
-static void zend_mm_mem_mmap_zero_dtor(zend_mm_storage *storage)
+static void zend_mm_munmap(void *addr, size_t size)
{
- close(zend_mm_dev_zero_fd);
- free(storage);
+#ifdef _WIN32
+ if (VirtualFree(addr, 0, MEM_RELEASE) == 0) {
+#if ZEND_MM_ERROR
+ fprintf(stderr, "\nVirtualFree() failed: [%d]\n", GetLastError());
+#endif
+ }
+#else
+ if (munmap(addr, size) != 0) {
+#if ZEND_MM_ERROR
+ fprintf(stderr, "\nmunmap() failed: [%d] %s\n", errno, strerror(errno));
+#endif
+ }
+#endif
}
-static zend_mm_segment* zend_mm_mem_mmap_zero_alloc(zend_mm_storage *storage, size_t size)
+/***********/
+/* Bitmask */
+/***********/
+
+/* number of trailing set (1) bits */
+static zend_always_inline int zend_mm_bitset_nts(zend_mm_bitset bitset)
{
- 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;
-}
+#if defined(__GNUC__)
+ return __builtin_ctzl(~bitset);
+#else
+ int n;
-# 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}
+ if (bitset == (zend_mm_bitset)-1) return ZEND_MM_BITSET_LEN;
+ n = 0;
+#if SIZEOF_LONG == 8
+ if (sizeof(zend_mm_bitset) == 8) {
+ if ((bitset & 0xffffffff) == 0xffffffff) {n += 32; bitset = bitset >> 32;}
+ }
#endif
+ if ((bitset & 0x0000ffff) == 0x0000ffff) {n += 16; bitset = bitset >> 16;}
+ if ((bitset & 0x000000ff) == 0x000000ff) {n += 8; bitset = bitset >> 8;}
+ if ((bitset & 0x0000000f) == 0x0000000f) {n += 4; bitset = bitset >> 4;}
+ if ((bitset & 0x00000003) == 0x00000003) {n += 2; bitset = bitset >> 2;}
+ return n + (bitset & 1);
+#endif
+}
-#ifdef HAVE_MEM_WIN32
-
-static zend_mm_storage* zend_mm_mem_win32_init(void *params)
+/* number of trailing zero bits (0x01 -> 1; 0x40 -> 6; 0x00 -> LEN) */
+static zend_always_inline int zend_mm_bitset_ntz(zend_mm_bitset bitset)
{
- HANDLE heap = HeapCreate(HEAP_NO_SERIALIZE, 0, 0);
- zend_mm_storage* storage;
+#if defined(__GNUC__)
+ return __builtin_ctzl(bitset);
+#else
+ int n;
- if (heap == NULL) {
- return NULL;
- }
- storage = (zend_mm_storage*)malloc(sizeof(zend_mm_storage));
- if (storage == NULL) {
- HeapDestroy(heap);
- return NULL;
+ if (bitset == (zend_mm_bitset)0) return ZEND_MM_BITSET_LEN;
+
+ n = 1;
+#if SIZEOF_LONG == 8
+ if (sizeof(zend_mm_bitset) == 8) {
+ if ((bitset & 0xffffffff) == 0) {n += 32; bitset = bitset >> 32;}
}
- storage->data = (void*) heap;
- return storage;
+#endif
+ if ((bitset & 0x0000ffff) == 0) {n += 16; bitset = bitset >> 16;}
+ if ((bitset & 0x000000ff) == 0) {n += 8; bitset = bitset >> 8;}
+ if ((bitset & 0x0000000f) == 0) {n += 4; bitset = bitset >> 4;}
+ if ((bitset & 0x00000003) == 0) {n += 2; bitset = bitset >> 2;}
+ return n - (bitset & 1);
+#endif
}
-static void zend_mm_mem_win32_dtor(zend_mm_storage *storage)
+static zend_always_inline int zend_mm_bitset_find_zero(zend_mm_bitset *bitset, int size)
{
- HeapDestroy((HANDLE)storage->data);
- free(storage);
+ int i = 0;
+
+ do {
+ zend_mm_bitset tmp = bitset[i];
+ if (tmp != (zend_mm_bitset)-1) {
+ return i * ZEND_MM_BITSET_LEN + zend_mm_bitset_nts(tmp);
+ }
+ i++;
+ } while (i < size);
+ return -1;
}
-static void zend_mm_mem_win32_compact(zend_mm_storage *storage)
+static zend_always_inline int zend_mm_bitset_find_one(zend_mm_bitset *bitset, int size)
{
- HeapDestroy((HANDLE)storage->data);
- storage->data = (void*)HeapCreate(HEAP_NO_SERIALIZE, 0, 0);
+ int i = 0;
+
+ do {
+ zend_mm_bitset tmp = bitset[i];
+ if (tmp != 0) {
+ return i * ZEND_MM_BITSET_LEN + zend_mm_bitset_ntz(tmp);
+ }
+ i++;
+ } while (i < size);
+ return -1;
}
-static zend_mm_segment* zend_mm_mem_win32_alloc(zend_mm_storage *storage, size_t size)
+static zend_always_inline int zend_mm_bitset_find_zero_and_set(zend_mm_bitset *bitset, int size)
{
- return (zend_mm_segment*) HeapAlloc((HANDLE)storage->data, HEAP_NO_SERIALIZE, size);
+ int i = 0;
+
+ do {
+ zend_mm_bitset tmp = bitset[i];
+ if (tmp != (zend_mm_bitset)-1) {
+ int n = zend_mm_bitset_nts(tmp);
+ bitset[i] |= 1 << n;
+ return i * ZEND_MM_BITSET_LEN + n;
+ }
+ i++;
+ } while (i < size);
+ return -1;
}
-static void zend_mm_mem_win32_free(zend_mm_storage *storage, zend_mm_segment* segment)
+static zend_always_inline int zend_mm_bitset_is_set(zend_mm_bitset *bitset, int bit)
{
- HeapFree((HANDLE)storage->data, HEAP_NO_SERIALIZE, segment);
+ return (bitset[bit / ZEND_MM_BITSET_LEN] & (1L << (bit & (ZEND_MM_BITSET_LEN-1)))) != 0;
}
-static zend_mm_segment* zend_mm_mem_win32_realloc(zend_mm_storage *storage, zend_mm_segment* segment, size_t size)
+static zend_always_inline void zend_mm_bitset_set_bit(zend_mm_bitset *bitset, int bit)
{
- return (zend_mm_segment*) HeapReAlloc((HANDLE)storage->data, HEAP_NO_SERIALIZE, segment, size);
+ bitset[bit / ZEND_MM_BITSET_LEN] |= (1L << (bit & (ZEND_MM_BITSET_LEN-1)));
}
-# 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_always_inline void zend_mm_bitset_reset_bit(zend_mm_bitset *bitset, int bit)
+{
+ bitset[bit / ZEND_MM_BITSET_LEN] &= ~(1L << (bit & (ZEND_MM_BITSET_LEN-1)));
+}
-static zend_mm_segment* zend_mm_mem_malloc_alloc(zend_mm_storage *storage, size_t size)
+static zend_always_inline void zend_mm_bitset_set_range(zend_mm_bitset *bitset, int start, int len)
{
- return (zend_mm_segment*)malloc(size);
+ if (len == 1) {
+ zend_mm_bitset_set_bit(bitset, start);
+ } else {
+ int pos = start / ZEND_MM_BITSET_LEN;
+ int end = (start + len - 1) / ZEND_MM_BITSET_LEN;
+ int bit = start & (ZEND_MM_BITSET_LEN - 1);
+ zend_mm_bitset tmp;
+
+ if (pos != end) {
+ /* set bits from "bit" to ZEND_MM_BITSET_LEN-1 */
+ tmp = (zend_mm_bitset)-1 << bit;
+ bitset[pos++] |= tmp;
+ while (pos != end) {
+ /* set all bits */
+ bitset[pos++] = (zend_mm_bitset)-1;
+ }
+ end = (start + len - 1) & (ZEND_MM_BITSET_LEN - 1);
+ /* set bits from "0" to "end" */
+ tmp = (zend_mm_bitset)-1 >> ((ZEND_MM_BITSET_LEN - 1) - end);
+ bitset[pos] |= tmp;
+ } else {
+ end = (start + len - 1) & (ZEND_MM_BITSET_LEN - 1);
+ /* set bits from "bit" to "end" */
+ tmp = (zend_mm_bitset)-1 << bit;
+ tmp &= (zend_mm_bitset)-1 >> ((ZEND_MM_BITSET_LEN - 1) - end);
+ bitset[pos] |= tmp;
+ }
+ }
}
-static zend_mm_segment* zend_mm_mem_malloc_realloc(zend_mm_storage *storage, zend_mm_segment *ptr, size_t size)
+static zend_always_inline void zend_mm_bitset_reset_range(zend_mm_bitset *bitset, int start, int len)
{
- return (zend_mm_segment*)realloc(ptr, size);
+ if (len == 1) {
+ zend_mm_bitset_reset_bit(bitset, start);
+ } else {
+ int pos = start / ZEND_MM_BITSET_LEN;
+ int end = (start + len - 1) / ZEND_MM_BITSET_LEN;
+ int bit = start & (ZEND_MM_BITSET_LEN - 1);
+ zend_mm_bitset tmp;
+
+ if (pos != end) {
+ /* reset bits from "bit" to ZEND_MM_BITSET_LEN-1 */
+ tmp = ~((1L << bit) - 1);
+ bitset[pos++] &= ~tmp;
+ while (pos != end) {
+ /* set all bits */
+ bitset[pos++] = 0;
+ }
+ end = (start + len - 1) & (ZEND_MM_BITSET_LEN - 1);
+ /* reset bits from "0" to "end" */
+ tmp = (zend_mm_bitset)-1 >> ((ZEND_MM_BITSET_LEN - 1) - end);
+ bitset[pos] &= ~tmp;
+ } else {
+ end = (start + len - 1) & (ZEND_MM_BITSET_LEN - 1);
+ /* reset bits from "bit" to "end" */
+ tmp = (zend_mm_bitset)-1 << bit;
+ tmp &= (zend_mm_bitset)-1 >> ((ZEND_MM_BITSET_LEN - 1) - end);
+ bitset[pos] &= ~tmp;
+ }
+ }
}
-static void zend_mm_mem_malloc_free(zend_mm_storage *storage, zend_mm_segment *ptr)
+static zend_always_inline int zend_mm_bitset_is_free_range(zend_mm_bitset *bitset, int start, int len)
{
- free(ptr);
+ if (len == 1) {
+ return !zend_mm_bitset_is_set(bitset, start);
+ } else {
+ int pos = start / ZEND_MM_BITSET_LEN;
+ int end = (start + len - 1) / ZEND_MM_BITSET_LEN;
+ int bit = start & (ZEND_MM_BITSET_LEN - 1);
+ zend_mm_bitset tmp;
+
+ if (pos != end) {
+ /* set bits from "bit" to ZEND_MM_BITSET_LEN-1 */
+ tmp = (zend_mm_bitset)-1 << bit;
+ if ((bitset[pos++] & tmp) != 0) {
+ return 0;
+ }
+ while (pos != end) {
+ /* set all bits */
+ if (bitset[pos++] != 0) {
+ return 0;
+ }
+ }
+ end = (start + len - 1) & (ZEND_MM_BITSET_LEN - 1);
+ /* set bits from "0" to "end" */
+ tmp = (zend_mm_bitset)-1 >> ((ZEND_MM_BITSET_LEN - 1) - end);
+ return (bitset[pos] & tmp) == 0;
+ } else {
+ end = (start + len - 1) & (ZEND_MM_BITSET_LEN - 1);
+ /* set bits from "bit" to "end" */
+ tmp = (zend_mm_bitset)-1 << bit;
+ tmp &= (zend_mm_bitset)-1 >> ((ZEND_MM_BITSET_LEN - 1) - end);
+ return (bitset[pos] & tmp) == 0;
+ }
+ }
}
-# 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}
+/**********/
+/* Chunks */
+/**********/
-#endif
+static void *zend_mm_chunk_alloc(size_t size, size_t alignment)
+{
+ void *ptr = zend_mm_mmap(size);
-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,
+ if (ptr == NULL) {
+ return NULL;
+ } else if (ZEND_MM_ALIGNED_OFFSET(ptr, alignment) == 0) {
+#ifdef MADV_HUGEPAGE
+ madvise(ptr, size, MADV_HUGEPAGE);
#endif
-#ifdef HAVE_MEM_MMAP_ZERO
- ZEND_MM_MEM_MMAP_ZERO_DSC,
+ return ptr;
+ } else {
+ size_t offset;
+
+ /* chunk has to be aligned */
+ zend_mm_munmap(ptr, size);
+ ptr = zend_mm_mmap(size + alignment - ZEND_MM_PAGE_SIZE);
+#ifdef _WIN32
+ offset = ZEND_MM_ALIGNED_OFFSET(ptr, alignment);
+ zend_mm_munmap(ptr, size + alignment - ZEND_MM_PAGE_SIZE);
+ ptr = zend_mm_mmap_fixed((void*)((char*)ptr + (alignment - offset)), size);
+ offset = ZEND_MM_ALIGNED_OFFSET(ptr, alignment);
+ if (offset != 0) {
+ zend_mm_munmap(ptr, size);
+ return NULL;
+ }
+ return ptr;
+#else
+ offset = ZEND_MM_ALIGNED_OFFSET(ptr, alignment);
+ if (offset != 0) {
+ offset = alignment - offset;
+ zend_mm_munmap(ptr, offset);
+ ptr = (char*)ptr + offset;
+ } else {
+ zend_mm_munmap((char*)ptr + size, alignment - ZEND_MM_PAGE_SIZE);
+ }
+# ifdef MADV_HUGEPAGE
+ madvise(ptr, size, MADV_HUGEPAGE);
+# endif
#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)
+ return ptr;
+ }
+}
-/****************/
-/* Heap Manager */
-/****************/
+static zend_always_inline void zend_mm_chunk_init(zend_mm_heap *heap, zend_mm_chunk *chunk)
+{
+ chunk->heap = heap;
+ chunk->next = heap->main_chunk;
+ chunk->prev = heap->main_chunk->prev;
+ chunk->prev->next = chunk;
+ chunk->next->prev = chunk;
+ /* mark first pages as allocated */
+ chunk->free_pages = ZEND_MM_PAGES - ZEND_MM_FIRST_PAGE;
+ chunk->free_tail = ZEND_MM_FIRST_PAGE;
+ /* the younger chunks have bigger number */
+ chunk->num = chunk->prev->num + 1;
+ /* mark first pages as allocated */
+ chunk->free_map[0] = (1L << ZEND_MM_FIRST_PAGE) - 1;
+ chunk->map[0] = ZEND_MM_LRUN(ZEND_MM_FIRST_PAGE);
+}
-#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
+/***********************/
+/* Huge Runs (forward) */
+/***********************/
-/* 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;
+static size_t zend_mm_get_huge_block_size(zend_mm_heap *heap, void *ptr ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC);
+static void *zend_mm_alloc_huge(zend_mm_heap *heap, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC);
+static void zend_mm_free_huge(zend_mm_heap *heap, void *ptr ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC);
#if ZEND_DEBUG
-
-typedef struct _zend_mm_debug_info {
- const char *filename;
- uint lineno;
- const char *orig_filename;
- uint orig_lineno;
- size_t size;
-#if ZEND_MM_HEAP_PROTECTION
- unsigned int start_magic;
+static void zend_mm_change_huge_block_size(zend_mm_heap *heap, void *ptr, size_t size, size_t dbg_size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC);
+#else
+static void zend_mm_change_huge_block_size(zend_mm_heap *heap, void *ptr, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC);
#endif
-} zend_mm_debug_info;
-#elif ZEND_MM_HEAP_PROTECTION
+/**************/
+/* Large Runs */
+/**************/
-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;
+static void *zend_mm_alloc_pages(zend_mm_heap *heap, int pages_count, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
+#else
+static void *zend_mm_alloc_pages(zend_mm_heap *heap, int pages_count ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
#endif
-} zend_mm_block;
+{
+ zend_mm_chunk *chunk = heap->main_chunk;
+ int page_num, len;
-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;
+ while (1) {
+ if (UNEXPECTED(chunk->free_pages < pages_count)) {
+ goto not_found;
+#if 0
+ } else if (UNEXPECTED(chunk->free_pages + chunk->free_tail == ZEND_MM_PAGES)) {
+ if (UNEXPECTED(ZEND_MM_PAGES - chunk->free_tail < pages_count)) {
+ goto not_found;
+ } else {
+ page_num = chunk->free_tail;
+ goto found;
+ }
+ } else if (0) {
+ /* First-Fit Search */
+ int free_tail = chunk->free_tail;
+ zend_mm_bitset *bitset = chunk->free_map;
+ zend_mm_bitset tmp = *(bitset++);
+ int i = 0;
-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];
- int rest_count;
-#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))
-
-#define ZEND_MM_REST_BLOCK ((zend_mm_free_block**)(zend_uintptr_t)(1))
-
-#define ZEND_MM_MAX_REST_BLOCKS 16
-
-#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)
+ while (1) {
+ /* skip allocated blocks */
+ while (tmp == (zend_mm_bitset)-1) {
+ i += ZEND_MM_BITSET_LEN;
+ if (i == ZEND_MM_PAGES) {
+ goto not_found;
+ }
+ tmp = *(bitset++);
+ }
+ /* find first 0 bit */
+ page_num = i + zend_mm_bitset_nts(tmp);
+ /* reset bits from 0 to "bit" */
+ tmp &= tmp + 1;
+ /* skip free blocks */
+ while (tmp == 0) {
+ i += ZEND_MM_BITSET_LEN;
+ len = i - page_num;
+ if (len >= pages_count) {
+ goto found;
+ } else if (i >= free_tail) {
+ goto not_found;
+ }
+ tmp = *(bitset++);
+ }
+ /* find first 1 bit */
+ len = (i + zend_mm_bitset_ntz(tmp)) - page_num;
+ if (len >= pages_count) {
+ goto found;
+ }
+ /* set bits from 0 to "bit" */
+ tmp |= tmp - 1;
+ }
#endif
+ } else {
+ /* Best-Fit Search */
+ int best = -1;
+ int best_len = ZEND_MM_PAGES;
+ int free_tail = chunk->free_tail;
+ zend_mm_bitset *bitset = chunk->free_map;
+ zend_mm_bitset tmp = *(bitset++);
+ int i = 0;
-#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, -(ssize_t)((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)
+ while (1) {
+ /* skip allocated blocks */
+ while (tmp == (zend_mm_bitset)-1) {
+ i += ZEND_MM_BITSET_LEN;
+ if (i == ZEND_MM_PAGES) {
+ if (best > 0) {
+ page_num = best;
+ goto found;
+ } else {
+ goto not_found;
+ }
+ }
+ tmp = *(bitset++);
+ }
+ /* find first 0 bit */
+ page_num = i + zend_mm_bitset_nts(tmp);
+ /* reset bits from 0 to "bit" */
+ tmp &= tmp + 1;
+ /* skip free blocks */
+ while (tmp == 0) {
+ i += ZEND_MM_BITSET_LEN;
+ if (i >= free_tail) {
+ len = ZEND_MM_PAGES - page_num;
+ if (len >= pages_count && len < best_len) {
+ chunk->free_tail = page_num + pages_count;
+ goto found;
+ } else {
+ /* set accurate value */
+ chunk->free_tail = page_num;
+ if (best > 0) {
+ page_num = best;
+ goto found;
+ } else {
+ goto not_found;
+ }
+ }
+ }
+ tmp = *(bitset++);
+ }
+ /* find first 1 bit */
+ len = i + zend_mm_bitset_ntz(tmp) - page_num;
+ if (len >= pages_count) {
+ if (len == pages_count) {
+ goto found;
+ } else if (len < best_len) {
+ best_len = len;
+ best = page_num;
+ }
+ }
+ /* set bits from 0 to "bit" */
+ tmp |= tmp - 1;
+ }
+ }
-/* Debug output */
+not_found:
+ if (chunk->next == heap->main_chunk) {
+ if (heap->cached_chunks) {
+ heap->cached_chunks_count--;
+ chunk = heap->cached_chunks;
+ heap->cached_chunks = chunk->next;
+ } else {
+#if ZEND_MM_LIMIT
+ if (heap->real_size + ZEND_MM_CHUNK_SIZE > heap->limit) {
+ if (heap->overflow == 0) {
#if ZEND_DEBUG
-
-# 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)
-
+ zend_mm_safe_error(heap, "Allowed memory size of " ZEND_ULONG_FMT " bytes exhausted at %s:%d (tried to allocate " ZEND_ULONG_FMT " bytes)", heap->limit, __zend_filename, __zend_lineno, size);
#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)
-
+ zend_mm_safe_error(heap, "Allowed memory size of " ZEND_ULONG_FMT " bytes exhausted (tried to allocate " ZEND_ULONG_FMT " bytes)", heap->limit, ZEND_MM_PAGE_SIZE * pages_count);
#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
-
+ return NULL;
+ }
+ }
#endif
+ chunk = (zend_mm_chunk*)zend_mm_chunk_alloc(ZEND_MM_CHUNK_SIZE, ZEND_MM_CHUNK_SIZE);
+ if (UNEXPECTED(chunk == NULL)) {
+ /* insufficient memory */
+ return NULL;
+ }
+#if ZEND_MM_STAT
+ do {
+ size_t size = heap->real_size + ZEND_MM_CHUNK_SIZE;
+ size_t peak = MAX(heap->real_peak, size);
+ heap->real_size = size;
+ heap->real_peak = peak;
+ } while (0);
+#elif ZEND_MM_LIMIT
+ heap->real_size += ZEND_MM_CHUNK_SIZE;
-#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 ZEND_ATTRIBUTE_ALLOC_SIZE(2);
-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) ZEND_ATTRIBUTE_ALLOC_SIZE(3);
-
-static inline unsigned int zend_mm_high_bit(size_t _size)
-{
-#if defined(__GNUC__) && (defined(__native_client__) || defined(i386))
- unsigned int n;
-
- __asm__("bsrl %1,%0\n\t" : "=r" (n) : "rm" (_size) : "cc");
- return n;
-#elif defined(__GNUC__) && defined(__x86_64__)
- zend_ulong n;
-
- __asm__("bsr %1,%0\n\t" : "=r" (n) : "rm" (_size) : "cc");
- return (unsigned int)n;
-#elif defined(_MSC_VER) && defined(_M_IX86)
- __asm {
- bsr eax, _size
+ }
+ heap->chunks_count++;
+ if (heap->chunks_count > heap->peak_chunks_count) {
+ heap->peak_chunks_count = heap->chunks_count;
+ }
+ zend_mm_chunk_init(heap, chunk);
+ page_num = ZEND_MM_FIRST_PAGE;
+ len = ZEND_MM_PAGES - ZEND_MM_FIRST_PAGE;
+ goto found;
+ } else {
+ chunk = chunk->next;
+ }
}
-#elif defined(__GNUC__) && (defined(__arm__) || defined(__aarch64__))
- return (8 * SIZEOF_SIZE_T - 1) - __builtin_clzl(_size);
-#else
- unsigned int n = 0;
- while (_size != 0) {
- _size = _size >> 1;
- n++;
+
+found:
+ /* mark run as allocated */
+ chunk->free_pages -= pages_count;
+ zend_mm_bitset_set_range(chunk->free_map, page_num, pages_count);
+ chunk->map[page_num] = ZEND_MM_LRUN(pages_count);
+ if (page_num == chunk->free_tail) {
+ chunk->free_tail = page_num + pages_count;
}
- return n-1;
-#endif
+ return ZEND_MM_PAGE_ADDR(chunk, page_num);
}
-static inline unsigned int zend_mm_low_bit(size_t _size)
+static zend_always_inline void *zend_mm_alloc_large(zend_mm_heap *heap, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
{
-#if defined(__GNUC__) && (defined(__native_client__) || defined(i386))
- unsigned int n;
-
- __asm__("bsfl %1,%0\n\t" : "=r" (n) : "rm" (_size) : "cc");
- return n;
-#elif defined(__GNUC__) && defined(__x86_64__)
- zend_ulong n;
-
- __asm__("bsf %1,%0\n\t" : "=r" (n) : "rm" (_size) : "cc");
- return (unsigned int)n;
-#elif defined(_MSC_VER) && defined(_M_IX86)
- __asm {
- bsf eax, _size
- }
-#elif defined(__GNUC__) && (defined(__arm__) || defined(__aarch64__))
- return __builtin_ctzl(_size);
+ int pages_count = ZEND_MM_SIZE_TO_NUM(size, ZEND_MM_PAGE_SIZE);
+#if ZEND_DEBUG
+ void *ptr = zend_mm_alloc_pages(heap, pages_count, size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
#else
- 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;
+ void *ptr = zend_mm_alloc_pages(heap, pages_count ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
+#endif
+#if ZEND_MM_STAT
+ do {
+ size_t size = heap->size + pages_count * ZEND_MM_PAGE_SIZE;
+ size_t peak = MAX(heap->peak, size);
+ heap->size = size;
+ heap->peak = peak;
+ } while (0);
#endif
+ return ptr;
}
-static 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);
+static void zend_mm_free_pages(zend_mm_heap *heap, zend_mm_chunk *chunk, int page_num, int pages_count)
+{
+ chunk->free_pages += pages_count;
+ zend_mm_bitset_reset_range(chunk->free_map, page_num, pages_count);
+ chunk->map[page_num] = 0;
+ if (chunk->free_tail == page_num + pages_count) {
+ /* this setting may be not accurate */
+ chunk->free_tail = page_num;
+ }
+ if (chunk->free_pages == ZEND_MM_PAGES - ZEND_MM_FIRST_PAGE) {
+ /* delete chunk */
+ chunk->next->prev = chunk->prev;
+ chunk->prev->next = chunk->next;
+ heap->chunks_count--;
+ if (heap->chunks_count + heap->cached_chunks_count < heap->avg_chunks_count + 0.1) {
+ /* delay deletion */
+ heap->cached_chunks_count++;
+ chunk->next = heap->cached_chunks;
+ heap->cached_chunks = chunk;
} else {
- 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;
- }
+#if ZEND_MM_STAT || ZEND_MM_LIMIT
+ heap->real_size -= ZEND_MM_CHUNK_SIZE;
+#endif
+ if (!heap->cached_chunks || chunk->num > heap->cached_chunks->num) {
+ zend_mm_munmap(chunk, ZEND_MM_CHUNK_SIZE);
+ } else {
+//TODO: select the best chunk to delete???
+ chunk->next = heap->cached_chunks->next;
+ zend_mm_munmap(heap->cached_chunks, ZEND_MM_CHUNK_SIZE);
+ heap->cached_chunks = chunk;
}
}
- } 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)
+static zend_always_inline void zend_mm_free_large(zend_mm_heap *heap, zend_mm_chunk *chunk, int page_num, int pages_count)
{
- 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");
- }
+#if ZEND_MM_STAT
+ heap->size -= pages_count * ZEND_MM_PAGE_SIZE;
#endif
+ zend_mm_free_pages(heap, chunk, page_num, pages_count);
+}
- 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 {
+/**************/
+/* Small Runs */
+/**************/
-#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");
- }
+/* higher set bit number (0->0, 1->1, 2->2, 4->3, 8->4, 127->7, 128->8 etc) */
+static zend_always_inline int zend_mm_small_size_to_bit(int size)
+{
+#if defined(__GNUC__)
+ return (__builtin_clz(size) ^ 0x1f) + 1;
+#else
+ int n = 16;
+ if (size == 0) return 0;
+ if (size <= 0x00ff) {n -= 8; size = size << 8;}
+ if (size <= 0x0fff) {n -= 4; size = size << 4;}
+ if (size <= 0x3fff) {n -= 2; size = size << 2;}
+ if (size <= 0x7fff) {n -= 1;}
+ return n;
#endif
-
- 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 == ZEND_MM_REST_BLOCK)) {
- heap->rest_count--;
- } else if (UNEXPECTED(mm_block->parent != NULL)) {
- goto subst_block;
- }
- }
}
-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;
-
- while (heap->rest_count >= ZEND_MM_MAX_REST_BLOCKS) {
- zend_mm_free_block *p = heap->rest_buckets[1];
-
- if (!ZEND_MM_SMALL_SIZE(ZEND_MM_FREE_BLOCK_SIZE(p))) {
- heap->rest_count--;
- }
- prev = p->prev_free_block;
- next = p->next_free_block;
- prev->next_free_block = next;
- next->prev_free_block = prev;
- zend_mm_add_to_free_list(heap, p);
- }
-
- if (!ZEND_MM_SMALL_SIZE(ZEND_MM_FREE_BLOCK_SIZE(mm_block))) {
- mm_block->parent = ZEND_MM_REST_BLOCK;
- heap->rest_count++;
- }
-
- ZEND_MM_SET_MAGIC(mm_block, MEM_BLOCK_FREED);
+#ifndef MAX
+# define MAX(a, b) (((a) > (b)) ? (a) : (b))
+#endif
- 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;
-}
+#ifndef MIN
+# define MIN(a, b) (((a) < (b)) ? (a) : (b))
+#endif
-static inline void zend_mm_init(zend_mm_heap *heap)
+static zend_always_inline int zend_mm_small_size_to_bin(size_t size)
{
- zend_mm_free_block* p;
- int i;
+#if 0
+ int n;
+ /*0, 1, 2, 3, 4, 5, 6, 7, 8, 9 10, 11, 12*/
+ static const int f1[] = { 3, 3, 3, 3, 3, 3, 3, 4, 5, 6, 7, 8, 9};
+ static const int f2[] = { 0, 0, 0, 0, 0, 0, 0, 4, 8, 12, 16, 20, 24};
+
+ if (UNEXPECTED(size <= 2)) return 0;
+ n = zend_mm_small_size_to_bit(size - 1);
+ return ((size-1) >> f1[n]) + f2[n];
+#else
+ int t1, t2, t3;
- 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;
- }
+ if (UNEXPECTED(size <= 8)) return 0;
+ t1 = (int)(size - 1);
+ t2 = zend_mm_small_size_to_bit(t1);
+ t3 = t2 - 6;
+ t3 = (t3 < 0) ? 0 : t3;
+ t2 = t3 + 3;
+ t1 = t1 >> t2;
+ t3 = t3 << 2;
+ return t1 + t3;
#endif
- 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);
- heap->rest_count = 0;
}
-static void zend_mm_del_segment(zend_mm_heap *heap, zend_mm_segment *segment)
-{
- zend_mm_segment **p = &heap->segments_list;
+#define ZEND_MM_SMALL_SIZE_TO_BIN(size) zend_mm_small_size_to_bin(size)
- 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)
+static zend_never_inline void *zend_mm_alloc_small_slow(zend_mm_heap *heap, int bin_num ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
{
- 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);
+ zend_mm_chunk *chunk;
+ int page_num;
+ zend_mm_bin *bin;
+ zend_mm_free_slot *p, *end;
- 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;
+#if ZEND_DEBUG
+ bin = (zend_mm_bin*)zend_mm_alloc_pages(heap, bin_pages[bin_num], bin_data_size[bin_num] ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
+#else
+ bin = (zend_mm_bin*)zend_mm_alloc_pages(heap, bin_pages[bin_num] ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
#endif
- }
+ if (UNEXPECTED(bin == NULL)) {
+ /* insufficient memory */
+ return NULL;
}
-}
-#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) {
+ chunk = (zend_mm_chunk*)ZEND_MM_ALIGNED_BASE(bin, ZEND_MM_CHUNK_SIZE);
+ page_num = ZEND_MM_ALIGNED_OFFSET(bin, ZEND_MM_CHUNK_SIZE) / ZEND_MM_PAGE_SIZE;
+ chunk->map[page_num] = ZEND_MM_SRUN(bin_num);
+ if (bin_pages[bin_num] > 1) {
+ int i = 1;
do {
- BOOL ret = CryptGenRandom(hCryptProv, size, buf);
- CryptReleaseContext(hCryptProv, 0);
- if (ret) {
- while (i < size && buf[i] != 0) {
- i++;
- }
- if (i == size) {
- return;
- }
- }
- } while (0);
+ chunk->map[page_num+i] = ZEND_MM_SRUN(bin_num);
+ i++;
+ } while (i < bin_pages[bin_num]);
}
-#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) {
+ /* create a linked list of elements from 1 to last */
+ end = (zend_mm_free_slot*)((char*)bin + (bin_data_size[bin_num] * (bin_elements[bin_num] - 1)));
+ heap->free_slot[bin_num] = p = (zend_mm_free_slot*)((char*)bin + bin_data_size[bin_num]);
+ do {
+ p->next_free_slot = (zend_mm_free_slot*)((char*)p + bin_data_size[bin_num]);;
+#if ZEND_DEBUG
do {
- 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);
+ zend_mm_debug_info *dbg = (zend_mm_debug_info*)((char*)p + bin_data_size[bin_num] - ZEND_MM_ALIGNED_SIZE(sizeof(zend_mm_debug_info)));
+ dbg->size = 0;
+ } while (0);
#endif
+ p = (zend_mm_free_slot*)((char*)p + bin_data_size[bin_num]);
+ } while (p != end);
-#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));
- }
+ /* terminate list using NULL */
+ p->next_free_slot = NULL;
+#if ZEND_DEBUG
+ do {
+ zend_mm_debug_info *dbg = (zend_mm_debug_info*)((char*)p + bin_data_size[bin_num] - ZEND_MM_ALIGNED_SIZE(sizeof(zend_mm_debug_info)));
+ dbg->size = 0;
+ } while (0);
#endif
- 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;
+ /* return first element */
+ return (char*)bin;
+}
- 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);
+static zend_always_inline void *zend_mm_alloc_small(zend_mm_heap *heap, size_t size, int bin_num ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
+{
+#if ZEND_MM_STAT
+ do {
+ size_t size = heap->size + bin_data_size[bin_num];
+ size_t peak = MAX(heap->peak, size);
+ heap->size = size;
+ heap->peak = peak;
+ } while (0);
#endif
- 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);
- mm_heap->rest_count = 0;
- free(heap);
- heap = mm_heap;
+ if (EXPECTED(heap->free_slot[bin_num] != NULL)) {
+ zend_mm_free_slot *p = heap->free_slot[bin_num];
+ heap->free_slot[bin_num] = p->next_free_slot;
+ return (void*)p;
+ } else {
+ return zend_mm_alloc_small_slow(heap, bin_num ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
}
- return heap;
}
-ZEND_API zend_mm_heap *zend_mm_startup(void)
+static zend_always_inline void zend_mm_free_small(zend_mm_heap *heap, void *ptr, int bin_num)
{
- 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;
+ zend_mm_free_slot *p;
- 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);
+#if ZEND_MM_STAT
+ heap->size -= bin_data_size[bin_num];
#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);
+#if ZEND_DEBUG
+ do {
+ zend_mm_debug_info *dbg = (zend_mm_debug_info*)((char*)ptr + bin_data_size[bin_num] - ZEND_MM_ALIGNED_SIZE(sizeof(zend_mm_debug_info)));
+ dbg->size = 0;
+ } while (0);
#endif
- 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;
+ p = (zend_mm_free_slot*)ptr;
+ p->next_free_slot = heap->free_slot[bin_num];
+ heap->free_slot[bin_num] = p;
}
+/********/
+/* Heap */
+/********/
+
#if ZEND_DEBUG
-static zend_long zend_mm_find_leaks(zend_mm_segment *segment, zend_mm_block *b)
+static zend_always_inline zend_mm_debug_info *zend_mm_get_debug_info(zend_mm_heap *heap, void *ptr)
{
- zend_long leaks = 0;
- zend_mm_block *p, *q;
+ size_t page_offset = ZEND_MM_ALIGNED_OFFSET(ptr, ZEND_MM_CHUNK_SIZE);
+ zend_mm_chunk *chunk;
+ int page_num;
+ zend_mm_page_info info;
- 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;
+ ZEND_MM_CHECK(page_offset != 0, "zend_mm_heap corrupted");
+ chunk = (zend_mm_chunk*)ZEND_MM_ALIGNED_BASE(ptr, ZEND_MM_CHUNK_SIZE);
+ page_num = page_offset / ZEND_MM_PAGE_SIZE;
+ info = chunk->map[page_num];
+ ZEND_MM_CHECK(chunk->heap == heap, "zend_mm_heap corrupted");
+ if (EXPECTED(info & ZEND_MM_IS_SRUN)) {
+ int bin_num = ZEND_MM_SRUN_BIN_NUM(info);
+ return (zend_mm_debug_info*)((char*)ptr + bin_data_size[bin_num] - ZEND_MM_ALIGNED_SIZE(sizeof(zend_mm_debug_info)));
+ } else /* if (info & ZEND_MM_IS_LRUN) */ {
+ int pages_count = ZEND_MM_LRUN_PAGES(info);
+
+ return (zend_mm_debug_info*)((char*)ptr + ZEND_MM_PAGE_SIZE * pages_count - ZEND_MM_ALIGNED_SIZE(sizeof(zend_mm_debug_info)));
}
- return leaks;
}
+#endif
-static void zend_mm_check_leaks(zend_mm_heap *heap TSRMLS_DC)
+static zend_always_inline void *zend_mm_alloc_heap(zend_mm_heap *heap, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
{
- zend_mm_segment *segment = heap->segments_list;
- zend_mm_block *p, *q;
- uint32_t total = 0;
+ void *ptr;
+#if ZEND_DEBUG
+ size_t real_size = size;
+ zend_mm_debug_info *dbg;
- 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) {
- zend_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 */
+ size = ZEND_MM_ALIGNED_SIZE(size) + ZEND_MM_ALIGNED_SIZE(sizeof(zend_mm_debug_info));
#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);
+ if (size <= ZEND_MM_MAX_SMALL_SIZE) {
+ ptr = zend_mm_alloc_small(heap, size, ZEND_MM_SMALL_SIZE_TO_BIN(size) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
+#if ZEND_DEBUG
+ dbg = zend_mm_get_debug_info(heap, ptr);
+ dbg->size = real_size;
+ dbg->filename = __zend_filename;
+ dbg->orig_filename = __zend_orig_filename;
+ dbg->lineno = __zend_lineno;
+ dbg->orig_lineno = __zend_orig_lineno;
+#endif
+ return ptr;
+ } else if (size <= ZEND_MM_MAX_LARGE_SIZE) {
+ ptr = zend_mm_alloc_large(heap, size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
+#if ZEND_DEBUG
+ dbg = zend_mm_get_debug_info(heap, ptr);
+ dbg->size = real_size;
+ dbg->filename = __zend_filename;
+ dbg->orig_filename = __zend_orig_filename;
+ dbg->lineno = __zend_lineno;
+ dbg->orig_lineno = __zend_orig_lineno;
+#endif
+ return ptr;
+ } else {
+#if ZEND_DEBUG
+ size = real_size;
+#endif
+ return zend_mm_alloc_huge(heap, size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
}
}
-static int zend_mm_check_ptr(zend_mm_heap *heap, void *ptr, int silent ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
+static zend_always_inline void zend_mm_free_heap(zend_mm_heap *heap, void *ptr 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;
+ size_t page_offset = ZEND_MM_ALIGNED_OFFSET(ptr, ZEND_MM_CHUNK_SIZE);
- 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", (zend_long)p->thread_id, (zend_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");
+ if (UNEXPECTED(page_offset == 0)) {
+ if (ptr != NULL) {
+ zend_mm_free_huge(heap, ptr ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
}
} else {
- char *end_magic = ZEND_MM_END_MAGIC_PTR(p);
+ zend_mm_chunk *chunk = (zend_mm_chunk*)ZEND_MM_ALIGNED_BASE(ptr, ZEND_MM_CHUNK_SIZE);
+ int page_num = page_offset / ZEND_MM_PAGE_SIZE;
+ zend_mm_page_info info = chunk->map[page_num];
- 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;
+ ZEND_MM_CHECK(chunk->heap == heap, "zend_mm_heap corrupted");
+ if (EXPECTED(info & ZEND_MM_IS_SRUN)) {
+ zend_mm_free_small(heap, ptr, ZEND_MM_SRUN_BIN_NUM(info));
+ } else /* if (info & ZEND_MM_IS_LRUN) */ {
+ int pages_count = ZEND_MM_LRUN_PAGES(info);
- 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);
- }
+ ZEND_MM_CHECK(ZEND_MM_ALIGNED_OFFSET(page_offset, ZEND_MM_PAGE_SIZE) == 0, "zend_mm_heap corrupted");
+ zend_mm_free_large(heap, chunk, page_num, pages_count);
}
- 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)
+static size_t zend_mm_size(zend_mm_heap *heap, void *ptr ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
{
- zend_mm_segment *segment = heap->segments_list;
- zend_mm_block *p, *q;
- int errors = 0;
+ size_t page_offset = ZEND_MM_ALIGNED_OFFSET(ptr, ZEND_MM_CHUNK_SIZE);
- 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 (UNEXPECTED(page_offset == 0)) {
+ return zend_mm_get_huge_block_size(heap, ptr ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
+ } else {
+ zend_mm_chunk *chunk;
+#if 0 && ZEND_DEBUG
+ zend_mm_debug_info *dbg = zend_mm_get_debug_info(heap, ptr);
+ return dbg->size;
+#else
+ int page_num;
+ zend_mm_page_info info;
+
+ chunk = (zend_mm_chunk*)ZEND_MM_ALIGNED_BASE(ptr, ZEND_MM_CHUNK_SIZE);
+ page_num = page_offset / ZEND_MM_PAGE_SIZE;
+ info = chunk->map[page_num];
+ ZEND_MM_CHECK(chunk->heap == heap, "zend_mm_heap corrupted");
+ if (EXPECTED(info & ZEND_MM_IS_SRUN)) {
+ return bin_data_size[ZEND_MM_SRUN_BIN_NUM(info)];
+ } else /* if (info & ZEND_MM_IS_LARGE_RUN) */ {
+ return ZEND_MM_LRUN_PAGES(info) * ZEND_MM_PAGE_SIZE;
}
- 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)
+static void *zend_mm_realloc_heap(zend_mm_heap *heap, void *ptr, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
{
- zend_mm_storage *storage;
- zend_mm_segment *segment;
- zend_mm_segment *prev;
- int internal;
-
- if (!heap->use_zend_alloc) {
- if (full_shutdown) {
- free(heap);
- }
- return;
- }
-
- if (heap->reserve) {
+ size_t page_offset;
+ size_t old_size;
+ size_t new_size;
+ void *ret;
#if ZEND_DEBUG
- if (!silent) {
- _zend_mm_free_int(heap, heap->reserve ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC);
- }
+ size_t real_size;
+ zend_mm_debug_info *dbg;
#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);
+ page_offset = ZEND_MM_ALIGNED_OFFSET(ptr, ZEND_MM_CHUNK_SIZE);
+ if (UNEXPECTED(page_offset == 0)) {
+ if (UNEXPECTED(ptr == NULL)) {
+ return zend_mm_alloc_heap(heap, size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
}
- }
+ old_size = zend_mm_get_huge_block_size(heap, ptr ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
+#if ZEND_DEBUG
+ real_size = size;
+ size = ZEND_MM_ALIGNED_SIZE(size) + ZEND_MM_ALIGNED_SIZE(sizeof(zend_mm_debug_info));
#endif
-
+ if (size > ZEND_MM_MAX_LARGE_SIZE) {
#if ZEND_DEBUG
- if (!silent) {
- zend_mm_check_leaks(heap TSRMLS_CC);
- }
+ size = real_size;
#endif
-
- internal = heap->internal;
- storage = heap->storage;
- segment = heap->segments_list;
- if (full_shutdown) {
- while (segment) {
- prev = segment;
- segment = segment->next_segment;
- ZEND_MM_STORAGE_FREE(prev);
- }
- heap->segments_list = NULL;
- storage->handlers->dtor(storage);
- if (!internal) {
- free(heap);
- }
- } else {
- if (segment) {
-#ifndef ZEND_WIN32
- if (heap->reserve_size) {
- while (segment->next_segment) {
- prev = segment;
- segment = segment->next_segment;
- ZEND_MM_STORAGE_FREE(prev);
- }
- heap->segments_list = segment;
- } else {
+ new_size = ZEND_MM_ALIGNED_SIZE_EX(size, ZEND_MM_PAGE_SIZE);
+ if (new_size == old_size) {
+#if ZEND_DEBUG
+ zend_mm_change_huge_block_size(heap, ptr, new_size, real_size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
+#else
+ zend_mm_change_huge_block_size(heap, ptr, new_size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
#endif
- do {
- prev = segment;
- segment = segment->next_segment;
- ZEND_MM_STORAGE_FREE(prev);
- } while (segment);
- heap->segments_list = NULL;
-#ifndef ZEND_WIN32
- }
+ return ptr;
+#ifndef _WIN32
+ } else if (new_size < old_size) {
+ /* unmup tail */
+ zend_mm_munmap((char*)ptr + new_size, old_size - new_size);
+#if ZEND_MM_STAT || ZEND_MM_LIMIT
+ heap->real_size -= old_size - new_size;
+#endif
+#if ZEND_MM_STAT
+ heap->size -= old_size - new_size;
#endif
- }
- if (heap->compact_size &&
- heap->real_peak > heap->compact_size) {
- storage->handlers->compact(storage);
- }
- zend_mm_init(heap);
- if (heap->segments_list) {
- heap->real_size = heap->segments_list->size;
- heap->real_peak = heap->segments_list->size;
- } else {
- heap->real_size = 0;
- heap->real_peak = 0;
- }
- heap->size = 0;
- heap->peak = 0;
- if (heap->segments_list) {
- /* mark segment as a free block */
- zend_mm_free_block *b = (zend_mm_free_block*)((char*)heap->segments_list + ZEND_MM_ALIGNED_SEGMENT_SIZE);
- size_t block_size = heap->segments_list->size - ZEND_MM_ALIGNED_SEGMENT_SIZE - ZEND_MM_ALIGNED_HEADER_SIZE;
-
- ZEND_MM_MARK_FIRST_BLOCK(b);
- ZEND_MM_LAST_BLOCK(ZEND_MM_BLOCK_AT(b, block_size));
- ZEND_MM_BLOCK(b, ZEND_MM_FREE_BLOCK, block_size);
- zend_mm_add_to_free_list(heap, b);
- }
- 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,
+ zend_mm_change_huge_block_size(heap, ptr, new_size, real_size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
+#else
+ zend_mm_change_huge_block_size(heap, ptr, new_size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
#endif
- 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) {
- const char *error_filename;
- uint error_lineno;
- TSRMLS_FETCH();
- if (zend_is_compiling(TSRMLS_C)) {
- zend_string *str = zend_get_compiled_filename(TSRMLS_C);
- error_filename = str ? str->val : NULL;
- error_lineno = zend_get_compiled_lineno(TSRMLS_C);
- } else if (EG(current_execute_data)) {
- zend_execute_data *ex = EG(current_execute_data);
-
- while (ex && (!ex->func || !ZEND_USER_CODE(ex->func->type))) {
- ex = ex->prev_execute_data;
- }
- if (ex) {
- error_filename = ex->func->op_array.filename->val;
- error_lineno = ex->opline->lineno;
- } else {
- error_filename = NULL;
- error_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,
+ return ptr;
+ } else /* if (new_size > old_size) */ {
+#if ZEND_MM_LIMIT
+ if (heap->real_size + (new_size - old_size) > heap->limit) {
+ if (heap->overflow == 0) {
#if ZEND_DEBUG
- filename,
- lineno,
-#endif
- size);
- } zend_catch {
- if (heap->overflow == 2) {
- fprintf(stderr, "\nFatal error: ");
- fprintf(stderr,
- format,
- limit,
+ zend_mm_safe_error(heap, "Allowed memory size of " ZEND_ULONG_FMT " bytes exhausted at %s:%d (tried to allocate " ZEND_ULONG_FMT " bytes)", heap->limit, __zend_filename, __zend_lineno, size);
+#else
+ zend_mm_safe_error(heap, "Allowed memory size of " ZEND_ULONG_FMT " bytes exhausted (tried to allocate " ZEND_ULONG_FMT " bytes)", heap->limit, size);
+#endif
+ return NULL;
+ }
+ }
+#endif
+ /* try to map tail right after this block */
+ if (zend_mm_mmap_fixed((char*)ptr + old_size, new_size - old_size)) {
+#if ZEND_MM_STAT || ZEND_MM_LIMIT
+ heap->real_size += new_size - old_size;
+#endif
+#if ZEND_MM_STAT
+ heap->size += new_size - old_size;
+#endif
#if ZEND_DEBUG
- filename,
- lineno,
+ zend_mm_change_huge_block_size(heap, ptr, new_size, real_size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
+#else
+ zend_mm_change_huge_block_size(heap, ptr, new_size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
#endif
- 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);
+ return ptr;
+ }
#endif
- } zend_end_try();
+ }
+ }
} else {
- heap->overflow = 2;
- }
- zend_bailout();
-}
+ zend_mm_chunk *chunk = (zend_mm_chunk*)ZEND_MM_ALIGNED_BASE(ptr, ZEND_MM_CHUNK_SIZE);
+ int page_num = page_offset / ZEND_MM_PAGE_SIZE;
+ zend_mm_page_info info = chunk->map[page_num];
+#if ZEND_DEBUG
+ size_t real_size = size;
-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;
+ size = ZEND_MM_ALIGNED_SIZE(size) + ZEND_MM_ALIGNED_SIZE(sizeof(zend_mm_debug_info));
+#endif
- if (bitmap == 0) {
- return NULL;
- }
+ ZEND_MM_CHECK(chunk->heap == heap, "zend_mm_heap corrupted");
+ if (info & ZEND_MM_IS_SRUN) {
+ int old_bin_num, bin_num;
- 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;
+ old_bin_num = ZEND_MM_SRUN_BIN_NUM(info);
+ old_size = bin_data_size[old_bin_num];
+ bin_num = ZEND_MM_SMALL_SIZE_TO_BIN(size);
+ if (old_bin_num == bin_num) {
+#if ZEND_DEBUG
+ dbg = zend_mm_get_debug_info(heap, ptr);
+ dbg->size = real_size;
+ dbg->filename = __zend_filename;
+ dbg->orig_filename = __zend_orig_filename;
+ dbg->lineno = __zend_lineno;
+ dbg->orig_lineno = __zend_orig_lineno;
+#endif
+ return ptr;
}
- 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 (info & ZEND_MM_IS_LARGE_RUN) */ {
+ ZEND_MM_CHECK(ZEND_MM_ALIGNED_OFFSET(page_offset, ZEND_MM_PAGE_SIZE) == 0, "zend_mm_heap corrupted");
+ old_size = ZEND_MM_LRUN_PAGES(info) * ZEND_MM_PAGE_SIZE;
+ if (size > ZEND_MM_MAX_SMALL_SIZE && size <= ZEND_MM_MAX_LARGE_SIZE) {
+ new_size = ZEND_MM_ALIGNED_SIZE_EX(size, ZEND_MM_PAGE_SIZE);
+ if (new_size == old_size) {
+#if ZEND_DEBUG
+ dbg = zend_mm_get_debug_info(heap, ptr);
+ dbg->size = real_size;
+ dbg->filename = __zend_filename;
+ dbg->orig_filename = __zend_orig_filename;
+ dbg->lineno = __zend_lineno;
+ dbg->orig_lineno = __zend_orig_lineno;
+#endif
+ return ptr;
+ } else if (new_size < old_size) {
+ /* free tail pages */
+ int new_pages_count = new_size / ZEND_MM_PAGE_SIZE;
+ int rest_pages_count = (old_size - new_size) / ZEND_MM_PAGE_SIZE;
+
+#if ZEND_MM_STAT
+ heap->size -= rest_pages_count * ZEND_MM_PAGE_SIZE;
+#endif
+ chunk->map[page_num] = ZEND_MM_LRUN(new_pages_count);
+ chunk->free_pages += rest_pages_count;
+ zend_mm_bitset_reset_range(chunk->free_map, page_num + new_pages_count, rest_pages_count);
+#if ZEND_DEBUG
+ dbg = zend_mm_get_debug_info(heap, ptr);
+ dbg->size = real_size;
+ dbg->filename = __zend_filename;
+ dbg->orig_filename = __zend_orig_filename;
+ dbg->lineno = __zend_lineno;
+ dbg->orig_lineno = __zend_orig_lineno;
+#endif
+ return ptr;
+ } else /* if (new_size > old_size) */ {
+ int new_pages_count = new_size / ZEND_MM_PAGE_SIZE;
+ int old_pages_count = old_size / ZEND_MM_PAGE_SIZE;
+
+ /* try to allocate tail pages after this block */
+ if (page_num + new_pages_count <= ZEND_MM_PAGES &&
+ zend_mm_bitset_is_free_range(chunk->free_map, page_num + old_pages_count, new_pages_count - old_pages_count)) {
+#if ZEND_MM_STAT
+ do {
+ size_t size = heap->size + (new_size - old_size);
+ size_t peak = MAX(heap->peak, size);
+ heap->size = size;
+ heap->peak = peak;
+ } while (0);
+#endif
+ chunk->free_pages -= new_pages_count - old_pages_count;
+ zend_mm_bitset_set_range(chunk->free_map, page_num + old_pages_count, new_pages_count - old_pages_count);
+ chunk->map[page_num] = ZEND_MM_LRUN(new_pages_count);
+#if ZEND_DEBUG
+ dbg = zend_mm_get_debug_info(heap, ptr);
+ dbg->size = real_size;
+ dbg->filename = __zend_filename;
+ dbg->orig_filename = __zend_orig_filename;
+ dbg->lineno = __zend_lineno;
+ dbg->orig_lineno = __zend_orig_lineno;
+#endif
+ return ptr;
+ }
}
- } else if (p->child[1]) {
- p = p->child[1];
- } else {
- break;
}
}
-
- for (p = rst; p; p = p->child[p->child[0] != NULL]) {
- 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 (best_fit) {
- return best_fit->next_free_block;
- }
- bitmap = bitmap >> 1;
- if (!bitmap) {
- return NULL;
- }
- index++;
- }
-
- /* Search for smallest "large" free block */
- best_fit = p = heap->large_free_buckets[index + zend_mm_low_bit(bitmap)];
- while ((p = p->child[p->child[0] != NULL])) {
- if (ZEND_MM_FREE_BLOCK_SIZE(p) < ZEND_MM_FREE_BLOCK_SIZE(best_fit)) {
- best_fit = p;
- }
- }
- return best_fit->next_free_block;
-}
-
-static void *_zend_mm_alloc_int(zend_mm_heap *heap, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
-{
- zend_mm_free_block *best_fit;
- size_t true_size = ZEND_MM_TRUE_SIZE(size);
- size_t block_size;
- size_t remaining_size;
- size_t segment_size;
- zend_mm_segment *segment;
- int keep_rest = 0;
-#ifdef ZEND_SIGNALS
- TSRMLS_FETCH();
+#if ZEND_DEBUG
+ size = real_size;
#endif
-
- HANDLE_BLOCK_INTERRUPTIONS();
-
- if (EXPECTED(ZEND_MM_SMALL_SIZE(true_size))) {
- size_t index = ZEND_MM_BUCKET_INDEX(true_size);
- size_t bitmap;
-
- if (UNEXPECTED(true_size < size)) {
- goto out_of_memory;
- }
-#if ZEND_MM_CACHE
- if (EXPECTED(heap->cache[index] != NULL)) {
- /* Get block from cache */
-#if ZEND_MM_CACHE_STAT
- heap->cache_stat[index].count--;
- heap->cache_stat[index].hit++;
-#endif
- best_fit = heap->cache[index];
- heap->cache[index] = best_fit->prev_free_block;
- heap->cached -= true_size;
- ZEND_MM_CHECK_MAGIC(best_fit, MEM_BLOCK_CACHED);
- ZEND_MM_SET_DEBUG_INFO(best_fit, size, 1, 0);
- HANDLE_UNBLOCK_INTERRUPTIONS();
- return ZEND_MM_DATA_OF(best_fit);
- }
-#if ZEND_MM_CACHE_STAT
- heap->cache_stat[index].miss++;
-#endif
-#endif
-
- bitmap = heap->free_bitmap >> index;
- if (bitmap) {
- /* Found some "small" free block that can be used */
- index += zend_mm_low_bit(bitmap);
- best_fit = heap->free_buckets[index*2];
-#if ZEND_MM_CACHE_STAT
- heap->cache_stat[ZEND_MM_NUM_BUCKETS].hit++;
-#endif
- goto zend_mm_finished_searching_for_block;
- }
}
-#if ZEND_MM_CACHE_STAT
- heap->cache_stat[ZEND_MM_NUM_BUCKETS].miss++;
-#endif
+ /* Naive reallocation */
+ old_size = zend_mm_size(heap, ptr ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
+ ret = zend_mm_alloc_heap(heap, size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
+ memcpy(ret, ptr, MIN(old_size, size));
+ zend_mm_free_heap(heap, ptr ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
+ return ret;
+}
+
+/*********************/
+/* Huge Runs (again) */
+/*********************/
- best_fit = zend_mm_search_large_block(heap, true_size);
+#if ZEND_DEBUG
+static void zend_mm_add_huge_block(zend_mm_heap *heap, void *ptr, size_t size, size_t dbg_size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
+#else
+static void zend_mm_add_huge_block(zend_mm_heap *heap, void *ptr, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
+#endif
+{
+ zend_mm_huge_list *list = (zend_mm_huge_list*)zend_mm_alloc_heap(heap, sizeof(zend_mm_huge_list) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
+ list->ptr = ptr;
+ list->size = size;
+ list->next = heap->huge_list;
+#if ZEND_DEBUG
+ list->dbg.size = dbg_size;
+ list->dbg.filename = __zend_filename;
+ list->dbg.orig_filename = __zend_orig_filename;
+ list->dbg.lineno = __zend_lineno;
+ list->dbg.orig_lineno = __zend_orig_lineno;
+#endif
+ heap->huge_list = list;
+}
- if (!best_fit && heap->real_size >= heap->limit - heap->block_size) {
- zend_mm_free_block *p = heap->rest_buckets[0];
- size_t best_size = -1;
+static size_t zend_mm_del_huge_block(zend_mm_heap *heap, void *ptr ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
+{
+ zend_mm_huge_list *prev = NULL;
+ zend_mm_huge_list *list = heap->huge_list;
+ while (list != NULL) {
+ if (list->ptr == ptr) {
+ size_t size;
- while (p != ZEND_MM_REST_BUCKET(heap)) {
- if (UNEXPECTED(ZEND_MM_FREE_BLOCK_SIZE(p) == true_size)) {
- best_fit = p;
- goto zend_mm_finished_searching_for_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 (prev) {
+ prev->next = list->next;
+ } else {
+ heap->huge_list = list->next;
}
- p = p->prev_free_block;
+ size = list->size;
+ zend_mm_free_heap(heap, list ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
+ return size;
}
+ prev = list;
+ list = list->next;
}
+ ZEND_MM_CHECK(0, "zend_mm_heap corrupted");
+ return 0;
+}
- if (!best_fit) {
- if (true_size > heap->block_size - (ZEND_MM_ALIGNED_SEGMENT_SIZE + ZEND_MM_ALIGNED_HEADER_SIZE)) {
- /* Make sure we add a memory block which is big enough,
- segment must have header "size" and trailer "guard" block */
- segment_size = true_size + ZEND_MM_ALIGNED_SEGMENT_SIZE + ZEND_MM_ALIGNED_HEADER_SIZE;
- segment_size = (segment_size + (heap->block_size-1)) & ~(heap->block_size-1);
- keep_rest = 1;
- } else {
- segment_size = heap->block_size;
+static size_t zend_mm_get_huge_block_size(zend_mm_heap *heap, void *ptr ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
+{
+ zend_mm_huge_list *list = heap->huge_list;
+ while (list != NULL) {
+ if (list->ptr == ptr) {
+ return list->size;
}
+ list = list->next;
+ }
+ ZEND_MM_CHECK(0, "zend_mm_heap corrupted");
+ return 0;
+}
- if (segment_size < true_size ||
- heap->real_size + segment_size > heap->limit) {
- /* Memory limit overflow */
-#if ZEND_MM_CACHE
- zend_mm_free_cache(heap);
-#endif
- HANDLE_UNBLOCK_INTERRUPTIONS();
#if ZEND_DEBUG
- zend_mm_safe_error(heap, "Allowed memory size of " ZEND_ULONG_FMT " bytes exhausted at %s:%d (tried to allocate " ZEND_ULONG_FMT " bytes)", heap->limit, __zend_filename, __zend_lineno, size);
+static void zend_mm_change_huge_block_size(zend_mm_heap *heap, void *ptr, size_t size, size_t dbg_size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
#else
- zend_mm_safe_error(heap, "Allowed memory size of " ZEND_ULONG_FMT " bytes exhausted (tried to allocate " ZEND_ULONG_FMT " bytes)", heap->limit, size);
+static void zend_mm_change_huge_block_size(zend_mm_heap *heap, void *ptr, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
+#endif
+{
+ zend_mm_huge_list *list = heap->huge_list;
+ while (list != NULL) {
+ if (list->ptr == ptr) {
+ list->size = size;
+#if ZEND_DEBUG
+ list->dbg.size = dbg_size;
+ list->dbg.filename = __zend_filename;
+ list->dbg.orig_filename = __zend_orig_filename;
+ list->dbg.lineno = __zend_lineno;
+ list->dbg.orig_lineno = __zend_orig_lineno;
#endif
+ return;
}
+ list = list->next;
+ }
+}
- segment = (zend_mm_segment *) ZEND_MM_STORAGE_ALLOC(segment_size);
+static void *zend_mm_alloc_huge(zend_mm_heap *heap, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
+{
+ size_t new_size = ZEND_MM_ALIGNED_SIZE_EX(size, ZEND_MM_PAGE_SIZE);
+ void *ptr;
- if (!segment) {
- /* Storage manager cannot allocate memory */
-#if ZEND_MM_CACHE
- zend_mm_free_cache(heap);
-#endif
-out_of_memory:
- HANDLE_UNBLOCK_INTERRUPTIONS();
+#if ZEND_MM_LIMIT
+ if (heap->real_size + new_size > heap->limit) {
+ if (heap->overflow == 0) {
#if ZEND_DEBUG
- zend_mm_safe_error(heap, "Out of memory (allocated %ld) at %s:%d (tried to allocate %lu bytes)", heap->real_size, __zend_filename, __zend_lineno, size);
+ zend_mm_safe_error(heap, "Allowed memory size of %ld bytes exhausted at %s:%d (tried to allocate %lu bytes)", heap->limit, __zend_filename, __zend_lineno, size);
#else
- zend_mm_safe_error(heap, "Out of memory (allocated %ld) (tried to allocate %lu bytes)", heap->real_size, size);
+ zend_mm_safe_error(heap, "Allowed memory size of %ld bytes exhausted (tried to allocate %lu bytes)", heap->limit, size);
#endif
return NULL;
}
-
- heap->real_size += segment_size;
- if (heap->real_size > heap->real_peak) {
- heap->real_peak = heap->real_size;
- }
-
- segment->size = segment_size;
- segment->next_segment = heap->segments_list;
- heap->segments_list = segment;
-
- best_fit = (zend_mm_free_block *) ((char *) segment + ZEND_MM_ALIGNED_SEGMENT_SIZE);
- ZEND_MM_MARK_FIRST_BLOCK(best_fit);
-
- block_size = segment_size - ZEND_MM_ALIGNED_SEGMENT_SIZE - ZEND_MM_ALIGNED_HEADER_SIZE;
-
- ZEND_MM_LAST_BLOCK(ZEND_MM_BLOCK_AT(best_fit, block_size));
-
- } else {
-zend_mm_finished_searching_for_block:
- /* remove from free list */
- ZEND_MM_CHECK_MAGIC(best_fit, MEM_BLOCK_FREED);
- ZEND_MM_CHECK_COOKIE(best_fit);
- ZEND_MM_CHECK_BLOCK_LINKAGE(best_fit);
- zend_mm_remove_from_free_list(heap, best_fit);
-
- block_size = ZEND_MM_FREE_BLOCK_SIZE(best_fit);
- }
-
- remaining_size = block_size - true_size;
-
- if (remaining_size < ZEND_MM_ALIGNED_MIN_HEADER_SIZE) {
- true_size = block_size;
- ZEND_MM_BLOCK(best_fit, ZEND_MM_USED_BLOCK, true_size);
- } else {
- zend_mm_free_block *new_free_block;
-
- /* prepare new free block */
- ZEND_MM_BLOCK(best_fit, ZEND_MM_USED_BLOCK, true_size);
- new_free_block = (zend_mm_free_block *) ZEND_MM_BLOCK_AT(best_fit, true_size);
- ZEND_MM_BLOCK(new_free_block, ZEND_MM_FREE_BLOCK, remaining_size);
-
- /* add the new free block to the free list */
- if (EXPECTED(!keep_rest)) {
- zend_mm_add_to_free_list(heap, new_free_block);
- } else {
- zend_mm_add_to_rest_list(heap, new_free_block);
- }
}
-
- ZEND_MM_SET_DEBUG_INFO(best_fit, size, 1, 1);
-
- heap->size += true_size;
- if (heap->peak < heap->size) {
- heap->peak = heap->size;
+#endif
+ ptr = zend_mm_chunk_alloc(new_size, ZEND_MM_CHUNK_SIZE);
+ if (UNEXPECTED(ptr == NULL)) {
+ /* insufficient memory */
+ return NULL;
}
-
- HANDLE_UNBLOCK_INTERRUPTIONS();
-
- return ZEND_MM_DATA_OF(best_fit);
+#if ZEND_DEBUG
+ zend_mm_add_huge_block(heap, ptr, new_size, size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
+#else
+ zend_mm_add_huge_block(heap, ptr, new_size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
+#endif
+#if ZEND_MM_STAT
+ do {
+ size_t size = heap->real_size + new_size;
+ size_t peak = MAX(heap->real_peak, size);
+ heap->real_size = size;
+ heap->real_peak = peak;
+ } while (0);
+ do {
+ size_t size = heap->size + new_size;
+ size_t peak = MAX(heap->peak, size);
+ heap->size = size;
+ heap->peak = peak;
+ } while (0);
+#elif ZEND_MM_LIMIT
+ heap->real_size += new_size;
+#endif
+ return ptr;
}
-
-static void _zend_mm_free_int(zend_mm_heap *heap, void *p ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
+static void zend_mm_free_huge(zend_mm_heap *heap, void *ptr ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
{
- zend_mm_block *mm_block;
- zend_mm_block *next_block;
size_t size;
-#ifdef ZEND_SIGNALS
- TSRMLS_FETCH();
-#endif
- if (!ZEND_MM_VALID_PTR(p)) {
- return;
- }
- HANDLE_BLOCK_INTERRUPTIONS();
-
- mm_block = ZEND_MM_HEADER_OF(p);
- size = ZEND_MM_BLOCK_SIZE(mm_block);
- ZEND_MM_CHECK_PROTECTION(mm_block);
-
-#if ZEND_DEBUG || ZEND_MM_HEAP_PROTECTION
- memset(ZEND_MM_DATA_OF(mm_block), 0x5a, mm_block->debug.size);
+ ZEND_MM_CHECK(ZEND_MM_ALIGNED_OFFSET(ptr, ZEND_MM_CHUNK_SIZE) == 0, "zend_mm_heap corrupted");
+ size = zend_mm_del_huge_block(heap, ptr ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
+ zend_mm_munmap(ptr, size);
+#if ZEND_MM_STAT || ZEND_MM_LIMIT
+ heap->real_size -= size;
+#endif
+#if ZEND_MM_STAT
+ heap->size -= size;
#endif
+}
-#if ZEND_MM_CACHE
- if (EXPECTED(ZEND_MM_SMALL_SIZE(size)) && EXPECTED(heap->cached < ZEND_MM_CACHE_SIZE)) {
- size_t index = ZEND_MM_BUCKET_INDEX(size);
- zend_mm_free_block **cache = &heap->cache[index];
+/******************/
+/* Initialization */
+/******************/
- ((zend_mm_free_block*)mm_block)->prev_free_block = *cache;
- *cache = (zend_mm_free_block*)mm_block;
- heap->cached += size;
- ZEND_MM_SET_MAGIC(mm_block, MEM_BLOCK_CACHED);
-#if ZEND_MM_CACHE_STAT
- if (++heap->cache_stat[index].count > heap->cache_stat[index].max_count) {
- heap->cache_stat[index].max_count = heap->cache_stat[index].count;
- }
+zend_mm_heap *zend_mm_init(void)
+{
+ zend_mm_chunk *chunk = (zend_mm_chunk*)zend_mm_chunk_alloc(ZEND_MM_CHUNK_SIZE, ZEND_MM_CHUNK_SIZE);
+ zend_mm_heap *heap;
+
+ if (UNEXPECTED(chunk == NULL)) {
+#if ZEND_MM_ERROR
+ fprintf(stderr, "\nCan't initialize heap: [%d] %s\n", errno, strerror(errno));
#endif
- HANDLE_UNBLOCK_INTERRUPTIONS();
- return;
+ return NULL;
}
+ heap = &chunk->heap_slot;
+ chunk->heap = heap;
+ chunk->next = chunk;
+ chunk->prev = chunk;
+ chunk->free_pages = ZEND_MM_PAGES - ZEND_MM_FIRST_PAGE;
+ chunk->free_tail = ZEND_MM_FIRST_PAGE;
+ chunk->num = 0;
+ chunk->free_map[0] = (1L << ZEND_MM_FIRST_PAGE) - 1;
+ chunk->map[0] = ZEND_MM_LRUN(ZEND_MM_FIRST_PAGE);
+ heap->main_chunk = chunk;
+ heap->cached_chunks = NULL;
+ heap->chunks_count = 1;
+ heap->peak_chunks_count = 1;
+ heap->cached_chunks_count = 0;
+ heap->avg_chunks_count = 1.0;
+#if ZEND_MM_STAT || ZEND_MM_LIMIT
+ heap->real_size = ZEND_MM_CHUNK_SIZE;
+#endif
+#if ZEND_MM_STAT
+ heap->real_peak = ZEND_MM_CHUNK_SIZE;
+ heap->size = 0;
+ heap->peak = 0;
#endif
+#if ZEND_MM_LIMIT
+ heap->limit = (-1L >> 1);
+ heap->overflow = 0;
+#endif
+#if ZEND_MM_CUSTOM
+ heap->use_custom_heap = 0;
+#endif
+ heap->huge_list = NULL;
+ return heap;
+}
- heap->size -= size;
-
- next_block = ZEND_MM_BLOCK_AT(mm_block, size);
- if (ZEND_MM_IS_FREE_BLOCK(next_block)) {
- zend_mm_remove_from_free_list(heap, (zend_mm_free_block *) next_block);
- size += ZEND_MM_FREE_BLOCK_SIZE(next_block);
- }
- if (ZEND_MM_PREV_BLOCK_IS_FREE(mm_block)) {
- mm_block = ZEND_MM_PREV_BLOCK(mm_block);
- zend_mm_remove_from_free_list(heap, (zend_mm_free_block *) mm_block);
- size += ZEND_MM_FREE_BLOCK_SIZE(mm_block);
+#if ZEND_DEBUG
+/******************/
+/* Leak detection */
+/******************/
+
+static zend_long zend_mm_find_leaks_small(zend_mm_chunk *p, int i, int j, zend_leak_info *leak)
+{
+ int empty = 1;
+ zend_long count = 0;
+ int bin_num = ZEND_MM_SRUN_BIN_NUM(p->map[i]);
+ zend_mm_debug_info *dbg = (zend_mm_debug_info*)((char*)p + ZEND_MM_PAGE_SIZE * i + bin_data_size[bin_num] * (j + 1) - ZEND_MM_ALIGNED_SIZE(sizeof(zend_mm_debug_info)));
+
+ while (j < bin_elements[bin_num]) {
+ if (dbg->size != 0) {
+ if (dbg->filename == leak->filename && dbg->lineno == leak->lineno) {
+ count++;
+ dbg->size = 0;
+ dbg->filename = NULL;
+ dbg->lineno = 0;
+ } else {
+ empty = 0;
+ }
+ }
+ j++;
+ dbg = (zend_mm_debug_info*)((char*)dbg + bin_data_size[bin_num]);
}
- if (ZEND_MM_IS_FIRST_BLOCK(mm_block) &&
- ZEND_MM_IS_GUARD_BLOCK(ZEND_MM_BLOCK_AT(mm_block, size))) {
- zend_mm_del_segment(heap, (zend_mm_segment *) ((char *)mm_block - ZEND_MM_ALIGNED_SEGMENT_SIZE));
- } else {
- ZEND_MM_BLOCK(mm_block, ZEND_MM_FREE_BLOCK, size);
- zend_mm_add_to_free_list(heap, (zend_mm_free_block *) mm_block);
+ if (empty) {
+ zend_mm_bitset_reset_range(p->free_map, i, bin_pages[bin_num]);
}
- HANDLE_UNBLOCK_INTERRUPTIONS();
+ return count;
}
-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 zend_long zend_mm_find_leaks(zend_mm_heap *heap, zend_mm_chunk *p, int i, zend_leak_info *leak)
{
- zend_mm_block *mm_block = ZEND_MM_HEADER_OF(p);
- zend_mm_block *next_block;
- size_t true_size;
- size_t orig_size;
- void *ptr;
-#ifdef ZEND_SIGNALS
- TSRMLS_FETCH();
-#endif
- if (UNEXPECTED(!p) || !ZEND_MM_VALID_PTR(p)) {
- return _zend_mm_alloc_int(heap, size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
- }
-
- HANDLE_BLOCK_INTERRUPTIONS();
+ zend_long count = 0;
- mm_block = ZEND_MM_HEADER_OF(p);
- true_size = ZEND_MM_TRUE_SIZE(size);
- orig_size = ZEND_MM_BLOCK_SIZE(mm_block);
- ZEND_MM_CHECK_PROTECTION(mm_block);
+ do {
+ while (i < p->free_tail) {
+ if (zend_mm_bitset_is_set(p->free_map, i)) {
+ if (p->map[i] & ZEND_MM_IS_SRUN) {
+ int bin_num = ZEND_MM_SRUN_BIN_NUM(p->map[i]);
+ count += zend_mm_find_leaks_small(p, i, 0, leak);
+ i += bin_pages[bin_num];
+ } else /* if (p->map[i] & ZEND_MM_IS_LRUN) */ {
+ int pages_count = ZEND_MM_LRUN_PAGES(p->map[i]);
+ zend_mm_debug_info *dbg = (zend_mm_debug_info*)((char*)p + ZEND_MM_PAGE_SIZE * (i + pages_count) - ZEND_MM_ALIGNED_SIZE(sizeof(zend_mm_debug_info)));
- if (UNEXPECTED(true_size < size)) {
- goto out_of_memory;
- }
-
- if (true_size <= orig_size) {
- size_t remaining_size = orig_size - true_size;
-
- if (remaining_size >= ZEND_MM_ALIGNED_MIN_HEADER_SIZE) {
- zend_mm_free_block *new_free_block;
-
- next_block = ZEND_MM_BLOCK_AT(mm_block, orig_size);
- if (ZEND_MM_IS_FREE_BLOCK(next_block)) {
- remaining_size += ZEND_MM_FREE_BLOCK_SIZE(next_block);
- zend_mm_remove_from_free_list(heap, (zend_mm_free_block *) next_block);
+ if (dbg->filename == leak->filename && dbg->lineno == leak->lineno) {
+ count++;
+ }
+ zend_mm_bitset_reset_range(p->free_map, i, pages_count);
+ i += pages_count;
+ }
+ } else {
+ i++;
}
-
- /* prepare new free block */
- ZEND_MM_BLOCK(mm_block, ZEND_MM_USED_BLOCK, true_size);
- new_free_block = (zend_mm_free_block *) ZEND_MM_BLOCK_AT(mm_block, true_size);
-
- ZEND_MM_BLOCK(new_free_block, ZEND_MM_FREE_BLOCK, remaining_size);
-
- /* add the new free block to the free list */
- zend_mm_add_to_free_list(heap, new_free_block);
- heap->size += (true_size - orig_size);
}
- ZEND_MM_SET_DEBUG_INFO(mm_block, size, 0, 0);
- HANDLE_UNBLOCK_INTERRUPTIONS();
- return p;
- }
+ p = p->next;
+ } while (p != heap->main_chunk);
+ return count;
+}
-#if ZEND_MM_CACHE
- if (ZEND_MM_SMALL_SIZE(true_size)) {
- size_t index = ZEND_MM_BUCKET_INDEX(true_size);
-
- if (heap->cache[index] != NULL) {
- zend_mm_free_block *best_fit;
- zend_mm_free_block **cache;
-
-#if ZEND_MM_CACHE_STAT
- heap->cache_stat[index].count--;
- heap->cache_stat[index].hit++;
-#endif
- best_fit = heap->cache[index];
- heap->cache[index] = best_fit->prev_free_block;
- ZEND_MM_CHECK_MAGIC(best_fit, MEM_BLOCK_CACHED);
- ZEND_MM_SET_DEBUG_INFO(best_fit, size, 1, 0);
-
- ptr = ZEND_MM_DATA_OF(best_fit);
-
-#if ZEND_DEBUG || ZEND_MM_HEAP_PROTECTION
- memcpy(ptr, p, mm_block->debug.size);
-#else
- memcpy(ptr, p, orig_size - ZEND_MM_ALIGNED_HEADER_SIZE);
-#endif
+static void zend_mm_check_leaks(zend_mm_heap *heap TSRMLS_DC)
+{
+ zend_mm_huge_list *list;
+ zend_mm_chunk *p;
+ zend_leak_info leak;
+ zend_long repeated = 0;
+ uint32_t total = 0;
+ int i, j;
- heap->cached -= true_size - orig_size;
+ /* find leaked huge blocks and free them */
+ list = heap->huge_list;
+ while (list) {
+ zend_mm_huge_list *q = list;
- index = ZEND_MM_BUCKET_INDEX(orig_size);
- cache = &heap->cache[index];
+ heap->huge_list = list->next;
- ((zend_mm_free_block*)mm_block)->prev_free_block = *cache;
- *cache = (zend_mm_free_block*)mm_block;
- ZEND_MM_SET_MAGIC(mm_block, MEM_BLOCK_CACHED);
-#if ZEND_MM_CACHE_STAT
- if (++heap->cache_stat[index].count > heap->cache_stat[index].max_count) {
- heap->cache_stat[index].max_count = heap->cache_stat[index].count;
- }
-#endif
+ leak.addr = list->ptr;
+ leak.size = list->dbg.size;
+ leak.filename = list->dbg.filename;
+ leak.orig_filename = list->dbg.orig_filename;
+ leak.lineno = list->dbg.lineno;
+ leak.orig_lineno = list->dbg.orig_lineno;
- HANDLE_UNBLOCK_INTERRUPTIONS();
- return ptr;
+ 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_huge(segment, p);
+ total += 1 + repeated;
+ if (repeated) {
+ zend_message_dispatcher(ZMSG_MEMORY_LEAK_REPEATED, (void *)(zend_uintptr_t)repeated TSRMLS_CC);
+ }
+
+ list = list->next;
+ zend_mm_munmap(q->ptr, q->size);
+ zend_mm_free_heap(heap, q, NULL, 0, NULL, 0);
+ }
+
+ /* for each chunk */
+ p = heap->main_chunk;
+ do {
+ i = ZEND_MM_FIRST_PAGE;
+ while (i < p->free_tail) {
+ if (zend_mm_bitset_is_set(p->free_map, i)) {
+ if (p->map[i] & ZEND_MM_IS_SRUN) {
+ int bin_num = ZEND_MM_SRUN_BIN_NUM(p->map[i]);
+ zend_mm_debug_info *dbg = (zend_mm_debug_info*)((char*)p + ZEND_MM_PAGE_SIZE * i + bin_data_size[bin_num] - ZEND_MM_ALIGNED_SIZE(sizeof(zend_mm_debug_info)));
+
+ j = 0;
+ while (j < bin_elements[bin_num]) {
+ if (dbg->size != 0) {
+ leak.addr = (zend_mm_debug_info*)((char*)p + ZEND_MM_PAGE_SIZE * i + bin_data_size[bin_num] * j);
+ leak.size = dbg->size;
+ leak.filename = dbg->filename;
+ leak.orig_filename = dbg->orig_filename;
+ leak.lineno = dbg->lineno;
+ leak.orig_lineno = dbg->orig_lineno;
+
+ zend_message_dispatcher(ZMSG_LOG_SCRIPT_NAME, NULL TSRMLS_CC);
+ zend_message_dispatcher(ZMSG_MEMORY_LEAK_DETECTED, &leak TSRMLS_CC);
+
+ dbg->size = 0;
+ dbg->filename = NULL;
+ dbg->lineno = 0;
+
+ repeated = zend_mm_find_leaks_small(p, i, j + 1, &leak) +
+ zend_mm_find_leaks(heap, p, i + bin_pages[bin_num], &leak);
+ total += 1 + repeated;
+ if (repeated) {
+ zend_message_dispatcher(ZMSG_MEMORY_LEAK_REPEATED, (void *)(zend_uintptr_t)repeated TSRMLS_CC);
+ }
+ }
+ dbg = (zend_mm_debug_info*)((char*)dbg + bin_data_size[bin_num]);
+ j++;
+ }
+ i += bin_pages[bin_num];
+ } else /* if (p->map[i] & ZEND_MM_IS_LRUN) */ {
+ int pages_count = ZEND_MM_LRUN_PAGES(p->map[i]);
+ zend_mm_debug_info *dbg = (zend_mm_debug_info*)((char*)p + ZEND_MM_PAGE_SIZE * (i + pages_count) - ZEND_MM_ALIGNED_SIZE(sizeof(zend_mm_debug_info)));
+
+ leak.addr = (void*)((char*)p + ZEND_MM_PAGE_SIZE * i);
+ leak.size = dbg->size;
+ leak.filename = dbg->filename;
+ leak.orig_filename = dbg->orig_filename;
+ leak.lineno = dbg->lineno;
+ leak.orig_lineno = dbg->orig_lineno;
+
+ zend_message_dispatcher(ZMSG_LOG_SCRIPT_NAME, NULL TSRMLS_CC);
+ zend_message_dispatcher(ZMSG_MEMORY_LEAK_DETECTED, &leak TSRMLS_CC);
+
+ zend_mm_bitset_reset_range(p->free_map, i, pages_count);
+
+ repeated = zend_mm_find_leaks(heap, p, i + pages_count, &leak);
+ total += 1 + repeated;
+ if (repeated) {
+ zend_message_dispatcher(ZMSG_MEMORY_LEAK_REPEATED, (void *)(zend_uintptr_t)repeated TSRMLS_CC);
+ }
+ i += pages_count;
+ }
+ } else {
+ i++;
+ }
}
+ p = p->next;
+ } while (p != heap->main_chunk);
+ if (total) {
+ zend_message_dispatcher(ZMSG_MEMORY_LEAKS_GRAND_TOTAL, &total TSRMLS_CC);
}
+}
#endif
- next_block = ZEND_MM_BLOCK_AT(mm_block, orig_size);
-
- if (ZEND_MM_IS_FREE_BLOCK(next_block)) {
- ZEND_MM_CHECK_COOKIE(next_block);
- ZEND_MM_CHECK_BLOCK_LINKAGE(next_block);
- if (orig_size + ZEND_MM_FREE_BLOCK_SIZE(next_block) >= true_size) {
- size_t block_size = orig_size + ZEND_MM_FREE_BLOCK_SIZE(next_block);
- size_t remaining_size = block_size - true_size;
-
- zend_mm_remove_from_free_list(heap, (zend_mm_free_block *) next_block);
-
- if (remaining_size < ZEND_MM_ALIGNED_MIN_HEADER_SIZE) {
- true_size = block_size;
- ZEND_MM_BLOCK(mm_block, ZEND_MM_USED_BLOCK, true_size);
- } else {
- zend_mm_free_block *new_free_block;
-
- /* prepare new free block */
- ZEND_MM_BLOCK(mm_block, ZEND_MM_USED_BLOCK, true_size);
- new_free_block = (zend_mm_free_block *) ZEND_MM_BLOCK_AT(mm_block, true_size);
- ZEND_MM_BLOCK(new_free_block, ZEND_MM_FREE_BLOCK, remaining_size);
-
- /* add the new free block to the free list */
- if (ZEND_MM_IS_FIRST_BLOCK(mm_block) &&
- ZEND_MM_IS_GUARD_BLOCK(ZEND_MM_BLOCK_AT(new_free_block, remaining_size))) {
- zend_mm_add_to_rest_list(heap, new_free_block);
- } else {
- zend_mm_add_to_free_list(heap, new_free_block);
- }
- }
- ZEND_MM_SET_DEBUG_INFO(mm_block, size, 0, 0);
- heap->size = heap->size + true_size - orig_size;
- if (heap->peak < heap->size) {
- heap->peak = heap->size;
- }
- HANDLE_UNBLOCK_INTERRUPTIONS();
- return p;
- } else if (ZEND_MM_IS_FIRST_BLOCK(mm_block) &&
- ZEND_MM_IS_GUARD_BLOCK(ZEND_MM_BLOCK_AT(next_block, ZEND_MM_FREE_BLOCK_SIZE(next_block)))) {
- zend_mm_remove_from_free_list(heap, (zend_mm_free_block *) next_block);
- goto realloc_segment;
- }
- } else if (ZEND_MM_IS_FIRST_BLOCK(mm_block) && ZEND_MM_IS_GUARD_BLOCK(next_block)) {
- zend_mm_segment *segment;
- zend_mm_segment *segment_copy;
- size_t segment_size;
- size_t block_size;
- size_t remaining_size;
-
-realloc_segment:
- /* segment size, size of block and size of guard block */
- if (true_size > heap->block_size - (ZEND_MM_ALIGNED_SEGMENT_SIZE + ZEND_MM_ALIGNED_HEADER_SIZE)) {
- segment_size = true_size+ZEND_MM_ALIGNED_SEGMENT_SIZE+ZEND_MM_ALIGNED_HEADER_SIZE;
- segment_size = (segment_size + (heap->block_size-1)) & ~(heap->block_size-1);
- } else {
- segment_size = heap->block_size;
- }
+void zend_mm_shutdown(zend_mm_heap *heap, int full, int silent TSRMLS_DC)
+{
+ zend_mm_chunk *p;
+ zend_mm_huge_list *list;
- segment_copy = (zend_mm_segment *) ((char *)mm_block - ZEND_MM_ALIGNED_SEGMENT_SIZE);
- if (segment_size < true_size ||
- heap->real_size + segment_size - segment_copy->size > heap->limit) {
- if (ZEND_MM_IS_FREE_BLOCK(next_block)) {
- zend_mm_add_to_free_list(heap, (zend_mm_free_block *) next_block);
- }
-#if ZEND_MM_CACHE
- zend_mm_free_cache(heap);
-#endif
- HANDLE_UNBLOCK_INTERRUPTIONS();
-#if ZEND_DEBUG
- zend_mm_safe_error(heap, "Allowed memory size of " ZEND_ULONG_FMT " bytes exhausted at %s:%d (tried to allocate " ZEND_ULONG_FMT " bytes)", heap->limit, __zend_filename, __zend_lineno, size);
-#else
- zend_mm_safe_error(heap, "Allowed memory size of " ZEND_ULONG_FMT " bytes exhausted (tried to allocate " ZEND_ULONG_FMT " bytes)", heap->limit, size);
+#if ZEND_MM_CUSTOM
+ if (heap->use_custom_heap) {
+ return;
+ }
#endif
- return NULL;
- }
- segment = ZEND_MM_STORAGE_REALLOC(segment_copy, segment_size);
- if (!segment) {
-#if ZEND_MM_CACHE
- zend_mm_free_cache(heap);
-#endif
-out_of_memory:
- HANDLE_UNBLOCK_INTERRUPTIONS();
#if ZEND_DEBUG
- zend_mm_safe_error(heap, "Out of memory (allocated %ld) at %s:%d (tried to allocate %ld bytes)", heap->real_size, __zend_filename, __zend_lineno, size);
-#else
- zend_mm_safe_error(heap, "Out of memory (allocated %ld) (tried to allocate %ld bytes)", heap->real_size, size);
+ if (!silent) {
+ zend_mm_check_leaks(heap TSRMLS_CC);
+ }
#endif
- return NULL;
- }
- heap->real_size += segment_size - segment->size;
- if (heap->real_size > heap->real_peak) {
- heap->real_peak = heap->real_size;
- }
-
- segment->size = segment_size;
-
- if (segment != segment_copy) {
- zend_mm_segment **seg = &heap->segments_list;
- while (*seg != segment_copy) {
- seg = &(*seg)->next_segment;
- }
- *seg = segment;
- mm_block = (zend_mm_block *) ((char *) segment + ZEND_MM_ALIGNED_SEGMENT_SIZE);
- ZEND_MM_MARK_FIRST_BLOCK(mm_block);
- }
-
- block_size = segment_size - ZEND_MM_ALIGNED_SEGMENT_SIZE - ZEND_MM_ALIGNED_HEADER_SIZE;
- remaining_size = block_size - true_size;
-
- /* setup guard block */
- ZEND_MM_LAST_BLOCK(ZEND_MM_BLOCK_AT(mm_block, block_size));
-
- if (remaining_size < ZEND_MM_ALIGNED_MIN_HEADER_SIZE) {
- true_size = block_size;
- ZEND_MM_BLOCK(mm_block, ZEND_MM_USED_BLOCK, true_size);
- } else {
- zend_mm_free_block *new_free_block;
-
- /* prepare new free block */
- ZEND_MM_BLOCK(mm_block, ZEND_MM_USED_BLOCK, true_size);
- new_free_block = (zend_mm_free_block *) ZEND_MM_BLOCK_AT(mm_block, true_size);
- ZEND_MM_BLOCK(new_free_block, ZEND_MM_FREE_BLOCK, remaining_size);
-
- /* add the new free block to the free list */
- zend_mm_add_to_rest_list(heap, new_free_block);
- }
- ZEND_MM_SET_DEBUG_INFO(mm_block, size, 1, 1);
-
- heap->size = heap->size + true_size - orig_size;
- if (heap->peak < heap->size) {
- heap->peak = heap->size;
- }
+ /* free huge blocks */
+ list = heap->huge_list;
+ while (list) {
+ zend_mm_huge_list *q = list;
+ list = list->next;
+ zend_mm_munmap(q->ptr, q->size);
+ }
- HANDLE_UNBLOCK_INTERRUPTIONS();
- return ZEND_MM_DATA_OF(mm_block);
+ /* move all chunks except of the first one into the cache */
+ p = heap->main_chunk->next;
+ while (p != heap->main_chunk) {
+ zend_mm_chunk *q = p->next;
+ p->next = heap->cached_chunks;
+ heap->cached_chunks = p;
+ p = q;
+ heap->chunks_count--;
+ heap->cached_chunks_count++;
}
- ptr = _zend_mm_alloc_int(heap, size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
-#if ZEND_DEBUG || ZEND_MM_HEAP_PROTECTION
- memcpy(ptr, p, mm_block->debug.size);
-#else
- memcpy(ptr, p, orig_size - ZEND_MM_ALIGNED_HEADER_SIZE);
-#endif
- _zend_mm_free_int(heap, p ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
- HANDLE_UNBLOCK_INTERRUPTIONS();
- return ptr;
-}
+ if (full) {
+ /* free all cached chunks */
+ while (heap->cached_chunks) {
+ p = heap->cached_chunks;
+ heap->cached_chunks = p->next;
+ zend_mm_munmap(p, ZEND_MM_CHUNK_SIZE);
+ }
+ /* free the first chunk */
+ zend_mm_munmap(heap->main_chunk, ZEND_MM_CHUNK_SIZE);
+ } else {
+ zend_mm_heap old_heap;
+
+ /* free some cached chunks to keep average count */
+ heap->avg_chunks_count = (heap->avg_chunks_count + (double)heap->peak_chunks_count) / 2.0;
+ while ((double)heap->cached_chunks_count + 0.9 > heap->avg_chunks_count &&
+ heap->cached_chunks) {
+ p = heap->cached_chunks;
+ heap->cached_chunks = p->next;
+ zend_mm_munmap(p, ZEND_MM_CHUNK_SIZE);
+ heap->cached_chunks_count--;
+ }
+ /* clear cached chunks */
+ p = heap->cached_chunks;
+ while (p != NULL) {
+ zend_mm_chunk *q = p->next;
+ memset(p, 0, sizeof(zend_mm_chunk));
+ p->next = q;
+ p = q;
+ }
+
+ /* reinitialize the first chunk and heap */
+ old_heap = *heap;
+ p = heap->main_chunk;
+ memset(p, 0, ZEND_MM_FIRST_PAGE * ZEND_MM_PAGE_SIZE);
+ *heap = old_heap;
+ memset(heap->free_slot, 0, sizeof(heap->free_slot));
+ heap->main_chunk = p;
+ p->heap = &p->heap_slot;
+ p->next = p;
+ p->prev = p;
+ p->free_pages = ZEND_MM_PAGES - ZEND_MM_FIRST_PAGE;
+ p->free_tail = ZEND_MM_FIRST_PAGE;
+ p->free_map[0] = (1L << ZEND_MM_FIRST_PAGE) - 1;
+ p->map[0] = ZEND_MM_LRUN(ZEND_MM_FIRST_PAGE);
+ heap->chunks_count = 1;
+ heap->peak_chunks_count = 1;
+#if ZEND_MM_STAT || ZEND_MM_LIMIT
+ heap->real_size = ZEND_MM_CHUNK_SIZE;
+#endif
+#if ZEND_MM_STAT
+ heap->real_peak = ZEND_MM_CHUNK_SIZE;
+#endif
+ }
+}
+
+/**************/
+/* PUBLIC API */
+/**************/
ZEND_API void *_zend_mm_alloc(zend_mm_heap *heap, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
{
- return _zend_mm_alloc_int(heap, size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
+ return zend_mm_alloc_heap(heap, size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
}
-ZEND_API void _zend_mm_free(zend_mm_heap *heap, void *p ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
+ZEND_API void _zend_mm_free(zend_mm_heap *heap, void *ptr ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
{
- _zend_mm_free_int(heap, p ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
+ zend_mm_free_heap(heap, ptr ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
}
-ZEND_API void *_zend_mm_realloc(zend_mm_heap *heap, void *ptr, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
+void *_zend_mm_realloc(zend_mm_heap *heap, void *ptr, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
{
- return _zend_mm_realloc_int(heap, ptr, size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
+ return zend_mm_realloc_heap(heap, ptr, size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
}
-ZEND_API size_t _zend_mm_block_size(zend_mm_heap *heap, void *p ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
+ZEND_API size_t _zend_mm_block_size(zend_mm_heap *heap, void *ptr ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
{
- zend_mm_block *mm_block;
-
- if (!ZEND_MM_VALID_PTR(p)) {
- return 0;
- }
- mm_block = ZEND_MM_HEADER_OF(p);
- ZEND_MM_CHECK_PROTECTION(mm_block);
-#if ZEND_DEBUG || ZEND_MM_HEAP_PROTECTION
- return mm_block->debug.size;
-#else
- return ZEND_MM_BLOCK_SIZE(mm_block);
-#endif
+ return zend_mm_size(heap, ptr ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
}
/**********************/
ZEND_API int is_zend_mm(TSRMLS_D)
{
- return AG(mm_heap)->use_zend_alloc;
+#if ZEND_MM_CUSTOM
+ return !AG(mm_heap)->use_custom_heap;
+#else
+ return 1;
+#endif
+}
+
+#if !ZEND_DEBUG && !defined(_WIN32)
+#undef _emalloc
+
+#if ZEND_MM_CUSTOM
+# define ZEND_MM_CUSTOM_ALLOCATOR(size) do { \
+ if (UNEXPECTED(AG(mm_heap)->use_custom_heap)) { \
+ return AG(mm_heap)->_malloc(size); \
+ } \
+ } while (0)
+# define ZEND_MM_CUSTOM_DEALLOCATOR(ptr) do { \
+ if (UNEXPECTED(AG(mm_heap)->use_custom_heap)) { \
+ AG(mm_heap)->_free(ptr); \
+ return; \
+ } \
+ } while (0)
+#else
+# define ZEND_MM_CUSTOM_ALLOCATOR(size)
+# define ZEND_MM_CUSTOM_DEALLOCATOR(ptr)
+#endif
+
+# define _ZEND_BIN_ALLOCATOR(_num, _size, _elements, _pages, x, y) \
+ ZEND_API void* ZEND_FASTCALL _emalloc_ ## _size(void) { \
+ TSRMLS_FETCH(); \
+ ZEND_MM_CUSTOM_ALLOCATOR(_size); \
+ return zend_mm_alloc_small(AG(mm_heap), _size, _num ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC); \
+ }
+
+ZEND_MM_BINS_INFO(_ZEND_BIN_ALLOCATOR, x, y)
+
+ZEND_API void* ZEND_FASTCALL _emalloc_large(size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
+{
+ TSRMLS_FETCH();
+
+ ZEND_MM_CUSTOM_ALLOCATOR(size);
+ return zend_mm_alloc_large(AG(mm_heap), size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
+}
+
+ZEND_API void* ZEND_FASTCALL _emalloc_huge(size_t size)
+{
+ TSRMLS_FETCH();
+
+ ZEND_MM_CUSTOM_ALLOCATOR(size);
+ return zend_mm_alloc_huge(AG(mm_heap), size);
+}
+
+# define _ZEND_BIN_FREE(_num, _size, _elements, _pages, x, y) \
+ ZEND_API void ZEND_FASTCALL _efree_ ## _size(void *ptr) { \
+ TSRMLS_FETCH(); \
+ ZEND_MM_CUSTOM_DEALLOCATOR(ptr); \
+ { \
+ size_t page_offset = ZEND_MM_ALIGNED_OFFSET(ptr, ZEND_MM_CHUNK_SIZE); \
+ zend_mm_chunk *chunk = (zend_mm_chunk*)ZEND_MM_ALIGNED_BASE(ptr, ZEND_MM_CHUNK_SIZE); \
+ int page_num = page_offset / ZEND_MM_PAGE_SIZE; \
+ ZEND_MM_CHECK(chunk->heap == AG(mm_heap), "zend_mm_heap corrupted"); \
+ ZEND_ASSERT(chunk->map[page_num] & ZEND_MM_IS_SRUN); \
+ ZEND_ASSERT(ZEND_MM_SRUN_BIN_NUM(chunk->map[page_num]) == _num); \
+ zend_mm_free_small(AG(mm_heap), ptr, _num); \
+ } \
+ }
+
+ZEND_MM_BINS_INFO(_ZEND_BIN_FREE, x, y)
+
+ZEND_API void ZEND_FASTCALL _efree_large(void *ptr, size_t size)
+{
+ TSRMLS_FETCH();
+
+ ZEND_MM_CUSTOM_DEALLOCATOR(ptr);
+ {
+ size_t page_offset = ZEND_MM_ALIGNED_OFFSET(ptr, ZEND_MM_CHUNK_SIZE);
+ zend_mm_chunk *chunk = (zend_mm_chunk*)ZEND_MM_ALIGNED_BASE(ptr, ZEND_MM_CHUNK_SIZE);
+ int page_num = page_offset / ZEND_MM_PAGE_SIZE;
+ int pages_count = ZEND_MM_ALIGNED_SIZE_EX(size, ZEND_MM_PAGE_SIZE) / ZEND_MM_PAGE_SIZE;
+
+ ZEND_MM_CHECK(chunk->heap == AG(mm_heap) && ZEND_MM_ALIGNED_OFFSET(page_offset, ZEND_MM_PAGE_SIZE) == 0, "zend_mm_heap corrupted");
+ ZEND_ASSERT(chunk->map[page_num] & ZEND_MM_IS_LRUN);
+ ZEND_ASSERT(ZEND_MM_LRUN_PAGES(chunk->map[page_num]) == pages_count);
+ zend_mm_free_large(AG(mm_heap), chunk, page_num, pages_count);
+ }
+}
+
+ZEND_API void ZEND_FASTCALL _efree_huge(void *ptr, size_t size)
+{
+ TSRMLS_FETCH();
+
+ ZEND_MM_CUSTOM_DEALLOCATOR(ptr);
+ // TODO: use size???
+ zend_mm_free_huge(AG(mm_heap), ptr);
}
+#endif
-ZEND_API void *_emalloc(size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
+ZEND_API void* ZEND_FASTCALL _emalloc(size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
{
TSRMLS_FETCH();
- if (UNEXPECTED(!AG(mm_heap)->use_zend_alloc)) {
+#if ZEND_MM_CUSTOM
+ if (UNEXPECTED(AG(mm_heap)->use_custom_heap)) {
return AG(mm_heap)->_malloc(size);
}
- return _zend_mm_alloc_int(AG(mm_heap), size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
+#endif
+ return zend_mm_alloc_heap(AG(mm_heap), size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
}
-ZEND_API void _efree(void *ptr ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
+ZEND_API void ZEND_FASTCALL _efree(void *ptr ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
{
TSRMLS_FETCH();
- if (UNEXPECTED(!AG(mm_heap)->use_zend_alloc)) {
+#if ZEND_MM_CUSTOM
+ if (UNEXPECTED(AG(mm_heap)->use_custom_heap)) {
AG(mm_heap)->_free(ptr);
return;
}
- _zend_mm_free_int(AG(mm_heap), ptr ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
+#endif
+ zend_mm_free_heap(AG(mm_heap), ptr ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
}
-ZEND_API void *_erealloc(void *ptr, size_t size, int allow_failure ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
+ZEND_API void* ZEND_FASTCALL _erealloc(void *ptr, size_t size, int allow_failure ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
{
TSRMLS_FETCH();
- if (UNEXPECTED(!AG(mm_heap)->use_zend_alloc)) {
+ if (UNEXPECTED(AG(mm_heap)->use_custom_heap)) {
return AG(mm_heap)->_realloc(ptr, size);
}
- return _zend_mm_realloc_int(AG(mm_heap), ptr, size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
+ return zend_mm_realloc_heap(AG(mm_heap), ptr, size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
}
-ZEND_API size_t _zend_mem_block_size(void *ptr TSRMLS_DC ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
+ZEND_API size_t ZEND_FASTCALL _zend_mem_block_size(void *ptr TSRMLS_DC ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
{
- if (UNEXPECTED(!AG(mm_heap)->use_zend_alloc)) {
+ if (UNEXPECTED(AG(mm_heap)->use_custom_heap)) {
return 0;
}
- return _zend_mm_block_size(AG(mm_heap), ptr ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
+ return zend_mm_size(AG(mm_heap), ptr ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
}
#if defined(__GNUC__) && (defined(__native_client__) || defined(i386))
: "%0"(res),
"rm"(size),
"rm"(offset));
-
+
if (UNEXPECTED(overflow)) {
zend_error_noreturn(E_ERROR, "Possible integer overflow in memory allocation (%zu * %zu + %zu)", nmemb, size, offset);
return 0;
#endif
-ZEND_API void *_safe_emalloc(size_t nmemb, size_t size, size_t offset ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
+ZEND_API void* ZEND_FASTCALL _safe_emalloc(size_t nmemb, size_t size, size_t offset ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
{
return emalloc_rel(safe_address(nmemb, size, offset));
}
-ZEND_API void *_safe_malloc(size_t nmemb, size_t size, size_t offset)
+ZEND_API void* ZEND_FASTCALL _safe_malloc(size_t nmemb, size_t size, size_t offset)
{
return pemalloc(safe_address(nmemb, size, offset), 1);
}
-ZEND_API void *_safe_erealloc(void *ptr, size_t nmemb, size_t size, size_t offset ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
+ZEND_API void* ZEND_FASTCALL _safe_erealloc(void *ptr, size_t nmemb, size_t size, size_t offset ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
{
return erealloc_rel(ptr, safe_address(nmemb, size, offset));
}
-ZEND_API void *_safe_realloc(void *ptr, size_t nmemb, size_t size, size_t offset)
+ZEND_API void* ZEND_FASTCALL _safe_realloc(void *ptr, size_t nmemb, size_t size, size_t offset)
{
return perealloc(ptr, safe_address(nmemb, size, offset), 1);
}
-ZEND_API void *_ecalloc(size_t nmemb, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
+ZEND_API void* ZEND_FASTCALL _ecalloc(size_t nmemb, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
{
void *p;
#ifdef ZEND_SIGNALS
return p;
}
-ZEND_API char *_estrdup(const char *s ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
+ZEND_API char* ZEND_FASTCALL _estrdup(const char *s ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
{
size_t length;
char *p;
return p;
}
-ZEND_API char *_estrndup(const char *s, size_t length ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
+ZEND_API char* ZEND_FASTCALL _estrndup(const char *s, size_t length ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
{
char *p;
#ifdef ZEND_SIGNALS
}
-ZEND_API char *zend_strndup(const char *s, size_t length)
+ZEND_API char* ZEND_FASTCALL zend_strndup(const char *s, size_t length)
{
char *p;
#ifdef ZEND_SIGNALS
ZEND_API int zend_set_memory_limit(size_t memory_limit TSRMLS_DC)
{
- AG(mm_heap)->limit = (memory_limit >= AG(mm_heap)->block_size) ? memory_limit : AG(mm_heap)->block_size;
-
+#if ZEND_MM_LIMIT
+ AG(mm_heap)->limit = (memory_limit >= ZEND_MM_CHUNK_SIZE) ? memory_limit : ZEND_MM_CHUNK_SIZE;
+#endif
return SUCCESS;
}
ZEND_API size_t zend_memory_usage(int real_usage TSRMLS_DC)
{
+#if ZEND_MM_STAT
if (real_usage) {
return AG(mm_heap)->real_size;
} else {
size_t usage = AG(mm_heap)->size;
-#if ZEND_MM_CACHE
- usage -= AG(mm_heap)->cached;
-#endif
return usage;
}
+#endif
+ return 0;
}
ZEND_API size_t zend_memory_peak_usage(int real_usage TSRMLS_DC)
{
+#if ZEND_MM_STAT
if (real_usage) {
return AG(mm_heap)->real_peak;
} else {
return AG(mm_heap)->peak;
}
+#endif
+ return 0;
}
ZEND_API void shutdown_memory_manager(int silent, int full_shutdown TSRMLS_DC)
static void alloc_globals_ctor(zend_alloc_globals *alloc_globals TSRMLS_DC)
{
+#if ZEND_MM_CUSTOM
char *tmp = getenv("USE_ZEND_ALLOC");
if (tmp && !zend_atoi(tmp, 0)) {
- alloc_globals->mm_heap = malloc(sizeof(struct _zend_mm_heap));
- memset(alloc_globals->mm_heap, 0, sizeof(struct _zend_mm_heap));
- alloc_globals->mm_heap->use_zend_alloc = 0;
+ alloc_globals->mm_heap = malloc(sizeof(zend_mm_heap));
+ memset(alloc_globals->mm_heap, 0, sizeof(zend_mm_heap));
+ alloc_globals->mm_heap->use_custom_heap = 1;
alloc_globals->mm_heap->_malloc = malloc;
alloc_globals->mm_heap->_free = free;
alloc_globals->mm_heap->_realloc = realloc;
- } else {
- alloc_globals->mm_heap = zend_mm_startup();
+ return;
}
+#endif
+ alloc_globals->mm_heap = zend_mm_init();
}
#ifdef ZTS
zend_mm_heap *old_heap;
old_heap = AG(mm_heap);
- AG(mm_heap) = new_heap;
- return old_heap;
-}
-
-ZEND_API zend_mm_storage *zend_mm_get_storage(zend_mm_heap *heap)
-{
- return heap->storage;
+ AG(mm_heap) = (zend_mm_heap*)new_heap;
+ return (zend_mm_heap*)old_heap;
}
ZEND_API void zend_mm_set_custom_handlers(zend_mm_heap *heap,
void (*_free)(void*),
void* (*_realloc)(void*, size_t))
{
- heap->use_zend_alloc = 0;
- heap->_malloc = _malloc;
- heap->_free = _free;
- heap->_realloc = _realloc;
-}
-
-#if ZEND_DEBUG
-ZEND_API int _mem_block_check(void *ptr, int silent ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
-{
- TSRMLS_FETCH();
-
- if (!AG(mm_heap)->use_zend_alloc) {
- return 1;
- }
- return zend_mm_check_ptr(AG(mm_heap), ptr, silent ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
-}
-
-
-ZEND_API void _full_mem_check(int silent ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
-{
- int errors;
- TSRMLS_FETCH();
-
- if (!AG(mm_heap)->use_zend_alloc) {
- return;
- }
+#if ZEND_MM_CUSTOM
+ zend_mm_heap *_heap = (zend_mm_heap*)heap;
- zend_debug_alloc_output("------------------------------------------------\n");
- zend_debug_alloc_output("Full Memory Check at %s:%d\n" ZEND_FILE_LINE_RELAY_CC);
-
- errors = zend_mm_check_heap(AG(mm_heap), silent ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
-
- zend_debug_alloc_output("End of full memory check %s:%d (%d errors)\n" ZEND_FILE_LINE_RELAY_CC, errors);
- zend_debug_alloc_output("------------------------------------------------\n");
-}
+ _heap->use_custom_heap = 1;
+ _heap->_malloc = _malloc;
+ _heap->_free = _free;
+ _heap->_realloc = _realloc;
#endif
+}
/*
* Local variables:
projects / php / commitdiff