/Zend/zend_alloc.c
C | 3023 lines | 2512 code | 293 blank | 218 comment | 492 complexity | 1793377e467f135e1b541e26914c0eef MD5 | raw file
Possible License(s): BSD-2-Clause, BSD-3-Clause, MPL-2.0-no-copyleft-exception, LGPL-2.1
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- /*
- +----------------------------------------------------------------------+
- | Zend Engine |
- +----------------------------------------------------------------------+
- | Copyright (c) Zend Technologies Ltd. (http://www.zend.com) |
- +----------------------------------------------------------------------+
- | This source file is subject to version 2.00 of the Zend license, |
- | that is bundled with this package in the file LICENSE, and is |
- | available through the world-wide-web at the following url: |
- | http://www.zend.com/license/2_00.txt. |
- | If you did not receive a copy of the Zend license and are unable to |
- | obtain it through the world-wide-web, please send a note to |
- | license@zend.com so we can mail you a copy immediately. |
- +----------------------------------------------------------------------+
- | Authors: Andi Gutmans <andi@php.net> |
- | Zeev Suraski <zeev@php.net> |
- | Dmitry Stogov <dmitry@php.net> |
- +----------------------------------------------------------------------+
- */
- /*
- * 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 aligned 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 "zend_operators.h"
- #include "zend_multiply.h"
- #include "zend_bitset.h"
- #include <signal.h>
- #ifdef HAVE_UNISTD_H
- # include <unistd.h>
- #endif
- #ifdef ZEND_WIN32
- # include <wincrypt.h>
- # include <process.h>
- # include "win32/winutil.h"
- #endif
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <sys/types.h>
- #include <sys/stat.h>
- #include <limits.h>
- #include <fcntl.h>
- #include <errno.h>
- #ifndef _WIN32
- # include <sys/mman.h>
- # ifndef MAP_ANON
- # ifdef MAP_ANONYMOUS
- # define MAP_ANON MAP_ANONYMOUS
- # endif
- # endif
- # ifndef MAP_FAILED
- # define MAP_FAILED ((void*)-1)
- # endif
- # ifndef MAP_POPULATE
- # define MAP_POPULATE 0
- # endif
- # if defined(_SC_PAGESIZE) || (_SC_PAGE_SIZE)
- # define REAL_PAGE_SIZE _real_page_size
- static size_t _real_page_size = ZEND_MM_PAGE_SIZE;
- # endif
- # ifdef MAP_ALIGNED_SUPER
- # define MAP_HUGETLB MAP_ALIGNED_SUPER
- # endif
- #endif
- #ifndef REAL_PAGE_SIZE
- # define REAL_PAGE_SIZE ZEND_MM_PAGE_SIZE
- #endif
- /* NetBSD has an mremap() function with a signature that is incompatible with Linux (WTF?),
- * so pretend it doesn't exist. */
- #ifndef __linux__
- # undef HAVE_MREMAP
- #endif
- #ifndef __APPLE__
- # define ZEND_MM_FD -1
- #else
- /* Mac allows to track anonymous page via vmmap per TAG id.
- * user land applications are allowed to take from 240 to 255.
- */
- # define ZEND_MM_FD (250<<24)
- #endif
- #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_STORAGE
- # define ZEND_MM_STORAGE 1 /* support for custom memory storage */
- #endif
- #ifndef ZEND_MM_ERROR
- # define ZEND_MM_ERROR 1 /* report system errors */
- #endif
- #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_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_SRUN_FREE_COUNTER_MASK 0x01ff0000
- #define ZEND_MM_SRUN_FREE_COUNTER_OFFSET 16
- #define ZEND_MM_NRUN_OFFSET_MASK 0x01ff0000
- #define ZEND_MM_NRUN_OFFSET_OFFSET 16
- #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_SRUN_FREE_COUNTER(info) (((info) & ZEND_MM_SRUN_FREE_COUNTER_MASK) >> ZEND_MM_SRUN_FREE_COUNTER_OFFSET)
- #define ZEND_MM_NRUN_OFFSET(info) (((info) & ZEND_MM_NRUN_OFFSET_MASK) >> ZEND_MM_NRUN_OFFSET_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_SRUN_EX(bin_num, count) (ZEND_MM_IS_SRUN | ((bin_num) << ZEND_MM_SRUN_BIN_NUM_OFFSET) | ((count) << ZEND_MM_SRUN_FREE_COUNTER_OFFSET))
- #define ZEND_MM_NRUN(bin_num, offset) (ZEND_MM_IS_SRUN | ZEND_MM_IS_LRUN | ((bin_num) << ZEND_MM_SRUN_BIN_NUM_OFFSET) | ((offset) << ZEND_MM_NRUN_OFFSET_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;
- int zend_mm_use_huge_pages = 0;
- /*
- * Memory is retrieved 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 reserved 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_STORAGE
- zend_mm_storage *storage;
- #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 allocated 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 */
- int last_chunks_delete_boundary; /* number of chunks after last deletion */
- int last_chunks_delete_count; /* number of deletion over the last boundary */
- #if ZEND_MM_CUSTOM
- union {
- struct {
- void *(*_malloc)(size_t);
- void (*_free)(void*);
- void *(*_realloc)(void*, size_t);
- } std;
- struct {
- void *(*_malloc)(size_t ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC);
- void (*_free)(void* ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC);
- void *(*_realloc)(void*, size_t ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC);
- } debug;
- } custom_heap;
- HashTable *tracked_allocs;
- #endif
- };
- struct _zend_mm_chunk {
- zend_mm_heap *heap;
- zend_mm_chunk *next;
- zend_mm_chunk *prev;
- uint32_t free_pages; /* number of free pages */
- uint32_t free_tail; /* number of free pages at the end of chunk */
- uint32_t num;
- char reserve[64 - (sizeof(void*) * 3 + sizeof(uint32_t) * 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 allocation of
- * a particular "small size".
- */
- struct _zend_mm_bin {
- char bytes[ZEND_MM_PAGE_SIZE * 8];
- };
- 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 uint32_t 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 uint32_t bin_elements[] = {
- ZEND_MM_BINS_INFO(_BIN_DATA_ELEMENTS, x, y)
- };
- #define _BIN_DATA_PAGES(num, size, elements, pages, x, y) pages,
- static const uint32_t bin_pages[] = {
- ZEND_MM_BINS_INFO(_BIN_DATA_PAGES, x, y)
- };
- #if ZEND_DEBUG
- ZEND_COLD void zend_debug_alloc_output(char *format, ...)
- {
- char output_buf[256];
- va_list args;
- va_start(args, format);
- vsprintf(output_buf, format, args);
- va_end(args);
- #ifdef ZEND_WIN32
- OutputDebugString(output_buf);
- #else
- fprintf(stderr, "%s", output_buf);
- #endif
- }
- #endif
- static ZEND_COLD ZEND_NORETURN void zend_mm_panic(const char *message)
- {
- fprintf(stderr, "%s\n", message);
- /* See http://support.microsoft.com/kb/190351 */
- #ifdef ZEND_WIN32
- fflush(stderr);
- #endif
- #if ZEND_DEBUG && defined(HAVE_KILL) && defined(HAVE_GETPID)
- kill(getpid(), SIGSEGV);
- #endif
- exit(1);
- }
- static ZEND_COLD ZEND_NORETURN void zend_mm_safe_error(zend_mm_heap *heap,
- const char *format,
- size_t limit,
- #if ZEND_DEBUG
- const char *filename,
- uint32_t lineno,
- #endif
- size_t size)
- {
- 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);
- }
- #ifdef _WIN32
- void
- stderr_last_error(char *msg)
- {
- DWORD err = GetLastError();
- char *buf = php_win32_error_to_msg(err);
- if (!buf[0]) {
- fprintf(stderr, "\n%s: [0x%08lx]\n", msg, err);
- }
- else {
- fprintf(stderr, "\n%s: [0x%08lx] %s\n", msg, err, buf);
- }
- php_win32_error_msg_free(buf);
- }
- #endif
- /*****************/
- /* OS Allocation */
- /*****************/
- #ifndef HAVE_MREMAP
- static void *zend_mm_mmap_fixed(void *addr, size_t size)
- {
- #ifdef _WIN32
- return VirtualAlloc(addr, size, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);
- #else
- int flags = MAP_PRIVATE | MAP_ANON;
- #if defined(MAP_EXCL)
- flags |= MAP_FIXED | MAP_EXCL;
- #endif
- /* MAP_FIXED leads to discarding of the old mapping, so it can't be used. */
- void *ptr = mmap(addr, size, PROT_READ | PROT_WRITE, flags /*| MAP_POPULATE | MAP_HUGETLB*/, ZEND_MM_FD, 0);
- if (ptr == MAP_FAILED) {
- #if ZEND_MM_ERROR && !defined(MAP_EXCL)
- fprintf(stderr, "\nmmap() failed: [%d] %s\n", errno, strerror(errno));
- #endif
- 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
- }
- return NULL;
- }
- return ptr;
- #endif
- }
- #endif
- static void *zend_mm_mmap(size_t size)
- {
- #ifdef _WIN32
- void *ptr = VirtualAlloc(NULL, size, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);
- if (ptr == NULL) {
- #if ZEND_MM_ERROR
- stderr_last_error("VirtualAlloc() failed");
- #endif
- return NULL;
- }
- return ptr;
- #else
- void *ptr;
- #ifdef MAP_HUGETLB
- if (zend_mm_use_huge_pages && size == ZEND_MM_CHUNK_SIZE) {
- ptr = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON | MAP_HUGETLB, -1, 0);
- if (ptr != MAP_FAILED) {
- return ptr;
- }
- }
- #endif
- ptr = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON, ZEND_MM_FD, 0);
- if (ptr == MAP_FAILED) {
- #if ZEND_MM_ERROR
- fprintf(stderr, "\nmmap() failed: [%d] %s\n", errno, strerror(errno));
- #endif
- return NULL;
- }
- return ptr;
- #endif
- }
- static void zend_mm_munmap(void *addr, size_t size)
- {
- #ifdef _WIN32
- if (VirtualFree(addr, 0, MEM_RELEASE) == 0) {
- #if ZEND_MM_ERROR
- stderr_last_error("VirtualFree() failed");
- #endif
- }
- #else
- if (munmap(addr, size) != 0) {
- #if ZEND_MM_ERROR
- fprintf(stderr, "\nmunmap() failed: [%d] %s\n", errno, strerror(errno));
- #endif
- }
- #endif
- }
- /***********/
- /* Bitmask */
- /***********/
- /* number of trailing set (1) bits */
- static zend_always_inline int zend_mm_bitset_nts(zend_mm_bitset bitset)
- {
- #if (defined(__GNUC__) || __has_builtin(__builtin_ctzl)) && SIZEOF_ZEND_LONG == SIZEOF_LONG && defined(PHP_HAVE_BUILTIN_CTZL)
- return __builtin_ctzl(~bitset);
- #elif (defined(__GNUC__) || __has_builtin(__builtin_ctzll)) && defined(PHP_HAVE_BUILTIN_CTZLL)
- return __builtin_ctzll(~bitset);
- #elif defined(_WIN32)
- unsigned long index;
- #if defined(_WIN64)
- if (!BitScanForward64(&index, ~bitset)) {
- #else
- if (!BitScanForward(&index, ~bitset)) {
- #endif
- /* undefined behavior */
- return 32;
- }
- return (int)index;
- #else
- int n;
- if (bitset == (zend_mm_bitset)-1) return ZEND_MM_BITSET_LEN;
- n = 0;
- #if SIZEOF_ZEND_LONG == 8
- if (sizeof(zend_mm_bitset) == 8) {
- if ((bitset & 0xffffffff) == 0xffffffff) {n += 32; bitset = bitset >> Z_UL(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
- }
- static zend_always_inline int zend_mm_bitset_is_set(zend_mm_bitset *bitset, int bit)
- {
- return ZEND_BIT_TEST(bitset, bit);
- }
- static zend_always_inline void zend_mm_bitset_set_bit(zend_mm_bitset *bitset, int bit)
- {
- bitset[bit / ZEND_MM_BITSET_LEN] |= (Z_UL(1) << (bit & (ZEND_MM_BITSET_LEN-1)));
- }
- static zend_always_inline void zend_mm_bitset_reset_bit(zend_mm_bitset *bitset, int bit)
- {
- bitset[bit / ZEND_MM_BITSET_LEN] &= ~(Z_UL(1) << (bit & (ZEND_MM_BITSET_LEN-1)));
- }
- static zend_always_inline void zend_mm_bitset_set_range(zend_mm_bitset *bitset, int start, int len)
- {
- 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_always_inline void zend_mm_bitset_reset_range(zend_mm_bitset *bitset, int start, int len)
- {
- 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 = ~((Z_UL(1) << 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 zend_always_inline int zend_mm_bitset_is_free_range(zend_mm_bitset *bitset, int start, int len)
- {
- 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;
- }
- }
- }
- /**********/
- /* Chunks */
- /**********/
- static void *zend_mm_chunk_alloc_int(size_t size, size_t alignment)
- {
- void *ptr = zend_mm_mmap(size);
- if (ptr == NULL) {
- return NULL;
- } else if (ZEND_MM_ALIGNED_OFFSET(ptr, alignment) == 0) {
- #ifdef MADV_HUGEPAGE
- if (zend_mm_use_huge_pages) {
- madvise(ptr, size, MADV_HUGEPAGE);
- }
- #endif
- return ptr;
- } else {
- size_t offset;
- /* chunk has to be aligned */
- zend_mm_munmap(ptr, size);
- ptr = zend_mm_mmap(size + alignment - REAL_PAGE_SIZE);
- #ifdef _WIN32
- offset = ZEND_MM_ALIGNED_OFFSET(ptr, alignment);
- zend_mm_munmap(ptr, size + alignment - REAL_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;
- alignment -= offset;
- }
- if (alignment > REAL_PAGE_SIZE) {
- zend_mm_munmap((char*)ptr + size, alignment - REAL_PAGE_SIZE);
- }
- # ifdef MADV_HUGEPAGE
- if (zend_mm_use_huge_pages) {
- madvise(ptr, size, MADV_HUGEPAGE);
- }
- # endif
- #endif
- return ptr;
- }
- }
- static void *zend_mm_chunk_alloc(zend_mm_heap *heap, size_t size, size_t alignment)
- {
- #if ZEND_MM_STORAGE
- if (UNEXPECTED(heap->storage)) {
- void *ptr = heap->storage->handlers.chunk_alloc(heap->storage, size, alignment);
- ZEND_ASSERT(((zend_uintptr_t)((char*)ptr + (alignment-1)) & (alignment-1)) == (zend_uintptr_t)ptr);
- return ptr;
- }
- #endif
- return zend_mm_chunk_alloc_int(size, alignment);
- }
- static void zend_mm_chunk_free(zend_mm_heap *heap, void *addr, size_t size)
- {
- #if ZEND_MM_STORAGE
- if (UNEXPECTED(heap->storage)) {
- heap->storage->handlers.chunk_free(heap->storage, addr, size);
- return;
- }
- #endif
- zend_mm_munmap(addr, size);
- }
- static int zend_mm_chunk_truncate(zend_mm_heap *heap, void *addr, size_t old_size, size_t new_size)
- {
- #if ZEND_MM_STORAGE
- if (UNEXPECTED(heap->storage)) {
- if (heap->storage->handlers.chunk_truncate) {
- return heap->storage->handlers.chunk_truncate(heap->storage, addr, old_size, new_size);
- } else {
- return 0;
- }
- }
- #endif
- #ifndef _WIN32
- zend_mm_munmap((char*)addr + new_size, old_size - new_size);
- return 1;
- #else
- return 0;
- #endif
- }
- static int zend_mm_chunk_extend(zend_mm_heap *heap, void *addr, size_t old_size, size_t new_size)
- {
- #if ZEND_MM_STORAGE
- if (UNEXPECTED(heap->storage)) {
- if (heap->storage->handlers.chunk_extend) {
- return heap->storage->handlers.chunk_extend(heap->storage, addr, old_size, new_size);
- } else {
- return 0;
- }
- }
- #endif
- #ifdef HAVE_MREMAP
- /* We don't use MREMAP_MAYMOVE due to alignment requirements. */
- void *ptr = mremap(addr, old_size, new_size, 0);
- if (ptr == MAP_FAILED) {
- return 0;
- }
- /* Sanity check: The mapping shouldn't have moved. */
- ZEND_ASSERT(ptr == addr);
- return 1;
- #elif !defined(_WIN32)
- return (zend_mm_mmap_fixed((char*)addr + old_size, new_size - old_size) != NULL);
- #else
- return 0;
- #endif
- }
- 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);
- }
- /***********************/
- /* Huge Runs (forward) */
- /***********************/
- 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
- 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
- /**************/
- /* Large Runs */
- /**************/
- #if ZEND_DEBUG
- static void *zend_mm_alloc_pages(zend_mm_heap *heap, uint32_t 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, uint32_t pages_count ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
- #endif
- {
- zend_mm_chunk *chunk = heap->main_chunk;
- uint32_t page_num, len;
- int steps = 0;
- 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;
- 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_ulong_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;
- uint32_t best_len = ZEND_MM_PAGES;
- uint32_t free_tail = chunk->free_tail;
- zend_mm_bitset *bitset = chunk->free_map;
- zend_mm_bitset tmp = *(bitset++);
- uint32_t i = 0;
- 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 || i == ZEND_MM_PAGES) {
- 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_ulong_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;
- }
- }
- not_found:
- if (chunk->next == heap->main_chunk) {
- get_chunk:
- if (heap->cached_chunks) {
- heap->cached_chunks_count--;
- chunk = heap->cached_chunks;
- heap->cached_chunks = chunk->next;
- } else {
- #if ZEND_MM_LIMIT
- if (UNEXPECTED(ZEND_MM_CHUNK_SIZE > heap->limit - heap->real_size)) {
- if (zend_mm_gc(heap)) {
- goto get_chunk;
- } else if (heap->overflow == 0) {
- #if ZEND_DEBUG
- zend_mm_safe_error(heap, "Allowed memory size of %zu bytes exhausted at %s:%d (tried to allocate %zu bytes)", heap->limit, __zend_filename, __zend_lineno, size);
- #else
- zend_mm_safe_error(heap, "Allowed memory size of %zu bytes exhausted (tried to allocate %zu bytes)", heap->limit, ZEND_MM_PAGE_SIZE * pages_count);
- #endif
- return NULL;
- }
- }
- #endif
- chunk = (zend_mm_chunk*)zend_mm_chunk_alloc(heap, ZEND_MM_CHUNK_SIZE, ZEND_MM_CHUNK_SIZE);
- if (UNEXPECTED(chunk == NULL)) {
- /* insufficient memory */
- if (zend_mm_gc(heap) &&
- (chunk = (zend_mm_chunk*)zend_mm_chunk_alloc(heap, ZEND_MM_CHUNK_SIZE, ZEND_MM_CHUNK_SIZE)) != NULL) {
- /* pass */
- } else {
- #if !ZEND_MM_LIMIT
- zend_mm_safe_error(heap, "Out of memory");
- #elif ZEND_DEBUG
- zend_mm_safe_error(heap, "Out of memory (allocated %zu) at %s:%d (tried to allocate %zu bytes)", heap->real_size, __zend_filename, __zend_lineno, size);
- #else
- zend_mm_safe_error(heap, "Out of memory (allocated %zu) (tried to allocate %zu bytes)", heap->real_size, ZEND_MM_PAGE_SIZE * pages_count);
- #endif
- 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;
- #endif
- }
- 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;
- steps++;
- }
- }
- found:
- if (steps > 2 && pages_count < 8) {
- /* move chunk into the head of the linked-list */
- chunk->prev->next = chunk->next;
- chunk->next->prev = chunk->prev;
- chunk->next = heap->main_chunk->next;
- chunk->prev = heap->main_chunk;
- chunk->prev->next = chunk;
- chunk->next->prev = chunk;
- }
- /* 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 ZEND_MM_PAGE_ADDR(chunk, page_num);
- }
- static zend_always_inline void *zend_mm_alloc_large_ex(zend_mm_heap *heap, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
- {
- int pages_count = (int)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
- 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;
- }
- #if ZEND_DEBUG
- static zend_never_inline void *zend_mm_alloc_large(zend_mm_heap *heap, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
- {
- return zend_mm_alloc_large_ex(heap, size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
- }
- #else
- static zend_never_inline void *zend_mm_alloc_large(zend_mm_heap *heap, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
- {
- return zend_mm_alloc_large_ex(heap, size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
- }
- #endif
- static zend_always_inline void zend_mm_delete_chunk(zend_mm_heap *heap, zend_mm_chunk *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
- || (heap->chunks_count == heap->last_chunks_delete_boundary
- && heap->last_chunks_delete_count >= 4)) {
- /* delay deletion */
- heap->cached_chunks_count++;
- chunk->next = heap->cached_chunks;
- heap->cached_chunks = chunk;
- } else {
- #if ZEND_MM_STAT || ZEND_MM_LIMIT
- heap->real_size -= ZEND_MM_CHUNK_SIZE;
- #endif
- if (!heap->cached_chunks) {
- if (heap->chunks_count != heap->last_chunks_delete_boundary) {
- heap->last_chunks_delete_boundary = heap->chunks_count;
- heap->last_chunks_delete_count = 0;
- } else {
- heap->last_chunks_delete_count++;
- }
- }
- if (!heap->cached_chunks || chunk->num > heap->cached_chunks->num) {
- zend_mm_chunk_free(heap, chunk, ZEND_MM_CHUNK_SIZE);
- } else {
- //TODO: select the best chunk to delete???
- chunk->next = heap->cached_chunks->next;
- zend_mm_chunk_free(heap, heap->cached_chunks, ZEND_MM_CHUNK_SIZE);
- heap->cached_chunks = chunk;
- }
- }
- }
- static zend_always_inline void zend_mm_free_pages_ex(zend_mm_heap *heap, zend_mm_chunk *chunk, uint32_t page_num, uint32_t pages_count, int free_chunk)
- {
- 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 (free_chunk && chunk->free_pages == ZEND_MM_PAGES - ZEND_MM_FIRST_PAGE) {
- zend_mm_delete_chunk(heap, chunk);
- }
- }
- static zend_never_inline void zend_mm_free_pages(zend_mm_heap *heap, zend_mm_chunk *chunk, int page_num, int pages_count)
- {
- zend_mm_free_pages_ex(heap, chunk, page_num, pages_count, 1);
- }
- static zend_always_inline void zend_mm_free_large(zend_mm_heap *heap, zend_mm_chunk *chunk, int page_num, int pages_count)
- {
- #if ZEND_MM_STAT
- heap->size -= pages_count * ZEND_MM_PAGE_SIZE;
- #endif
- zend_mm_free_pages(heap, chunk, page_num, pages_count);
- }
- /**************/
- /* Small Runs */
- /**************/
- /* higher set bit number (0->N/A, 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__) || __has_builtin(__builtin_clz)) && defined(PHP_HAVE_BUILTIN_CLZ)
- return (__builtin_clz(size) ^ 0x1f) + 1;
- #elif defined(_WIN32)
- unsigned long index;
- if (!BitScanReverse(&index, (unsigned long)size)) {
- /* undefined behavior */
- return 64;
- }
- return (((31 - (int)index) ^ 0x1f) + 1);
- #else
- int n = 16;
- 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
- }
- #ifndef MAX
- # define MAX(a, b) (((a) > (b)) ? (a) : (b))
- #endif
- #ifndef MIN
- # define MIN(a, b) (((a) < (b)) ? (a) : (b))
- #endif
- static zend_always_inline int zend_mm_small_size_to_bin(size_t size)
- {
- #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
- unsigned int t1, t2;
- if (size <= 64) {
- /* we need to support size == 0 ... */
- return (size - !!size) >> 3;
- } else {
- t1 = size - 1;
- t2 = zend_mm_small_size_to_bit(t1) - 3;
- t1 = t1 >> t2;
- t2 = t2 - 3;
- t2 = t2 << 2;
- return (int)(t1 + t2);
- }
- #endif
- }
- #define ZEND_MM_SMALL_SIZE_TO_BIN(size) zend_mm_small_size_to_bin(size)
- static zend_never_inline void *zend_mm_alloc_small_slow(zend_mm_heap *heap, uint32_t bin_num ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
- {
- zend_mm_chunk *chunk;
- int page_num;
- zend_mm_bin *bin;
- zend_mm_free_slot *p, *end;
- #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;
- }
- 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) {
- uint32_t i = 1;
- do {
- chunk->map[page_num+i] = ZEND_MM_NRUN(bin_num, i);
- i++;
- } while (i < bin_pages[bin_num]);
- }
- /* 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 {
- 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);
- /* 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
- /* return first element */
- return (char*)bin;
- }
- static zend_always_inline void *zend_mm_alloc_small(zend_mm_heap *heap, 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
- 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);
- }
- }
- static zend_always_inline void zend_mm_free_small(zend_mm_heap *heap, void *ptr, int bin_num)
- {
- zend_mm_free_slot *p;
- #if ZEND_MM_STAT
- heap->size -= bin_data_size[bin_num];
- #endif
- #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
- 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_always_inline zend_mm_debug_info *zend_mm_get_debug_info(zend_mm_heap *heap, void *ptr)
- {
- 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;
- 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 = (int)(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)));
- }
- }
- #endif
- 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)
- {
- void *ptr;
- #if ZEND_DEBUG
- size_t real_size = size;
- zend_mm_debug_info *dbg;
- /* special handling for zero-size allocation */
- size = MAX(size, 1);
- size = ZEND_MM_ALIGNED_SIZE(size) + ZEND_MM_ALIGNED_SIZE(sizeof(zend_mm_debug_info));
- if (UNEXPECTED(size < real_size)) {
- zend_error_noreturn(E_ERROR, "Possible integer overflow in memory allocation (%zu + %zu)", ZEND_MM_ALIGNED_SIZE(real_size), ZEND_MM_ALIGNED_SIZE(sizeof(zend_mm_debug_info)));
- return NULL;
- }
- #endif
- if (EXPECTED(size <= ZEND_MM_MAX_SMALL_SIZE)) {
- ptr = zend_mm_alloc_small(heap, 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 (EXPECTED(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 zend_always_inline void zend_mm_free_heap(zend_mm_heap *heap, void *ptr ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
- {
- size_t page_offset = ZEND_MM_ALIGNED_OFFSET(ptr, ZEND_MM_CHUNK_SIZE);
- 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 {
- zend_mm_chunk *chunk = (zend_mm_chunk*)ZEND_MM_ALIGNED_BASE(ptr, ZEND_MM_CHUNK_SIZE);
- int page_num = (int)(page_offset / ZEND_MM_PAGE_SIZE);
- zend_mm_page_info info = chunk->map[page_num];
- 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);
- 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);
- }
- }
- }
- static size_t zend_mm_size(zend_mm_heap *heap, void *ptr ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
- {
- size_t page_offset = ZEND_MM_ALIGNED_OFFSET(ptr, ZEND_MM_CHUNK_SIZE);
- 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 = (int)(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;
- }
- #endif
- }
- }
- static zend_never_inline void *zend_mm_realloc_slow(zend_mm_heap *heap, void *ptr, size_t size, size_t copy_size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
- {
- void *ret;
- #if ZEND_MM_STAT
- do {
- size_t orig_peak = heap->peak;
- #endif
- ret = zend_mm_alloc_heap(heap, size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
- memcpy(ret, ptr, copy_size);
- zend_mm_free_heap(heap, ptr ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
- #if ZEND_MM_STAT
- heap->peak = MAX(orig_peak, heap->size);
- } while (0);
- #endif
- return ret;
- }
- static zend_never_inline void *zend_mm_realloc_huge(zend_mm_heap *heap, void *ptr, size_t size, size_t copy_size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
- {
- size_t old_size;
- size_t new_size;
- #if ZEND_DEBUG
- size_t real_size;
- #endif
- 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
- size = real_size;
- #endif
- #ifdef ZEND_WIN32
- /* On Windows we don't have ability to extend huge blocks in-place.
- * We allocate them with 2MB size granularity, to avoid many
- * reallocations when they are extended by small pieces
- */
- new_size = ZEND_MM_ALIGNED_SIZE_EX(size, MAX(REAL_PAGE_SIZE, ZEND_MM_CHUNK_SIZE));
- #else
- new_size = ZEND_MM_ALIGNED_SIZE_EX(size, REAL_PAGE_SIZE);
- #endif
- 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
- return ptr;
- } else if (new_size < old_size) {
- /* unmup tail */
- if (zend_mm_chunk_truncate(heap, ptr, 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 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
- return ptr;
- }
- } else /* if (new_size > old_size) */ {
- #if ZEND_MM_LIMIT
- if (UNEXPECTED(new_size - old_size > heap->limit - heap->real_size)) {
- if (zend_mm_gc(heap) && new_size - old_size <= heap->limit - heap->real_size) {
- /* pass */
- } else if (heap->overflow == 0) {
- #if ZEND_DEBUG
- zend_mm_safe_error(heap, "Allowed memory size of %zu bytes exhausted at %s:%d (tried to allocate %zu bytes)", heap->limit, __zend_filename, __zend_lineno, size);
- #else
- zend_mm_safe_error(heap, "Allowed memory size of %zu bytes exhausted (tried to allocate %zu bytes)", heap->limit, size);
- #endif
- return NULL;
- }
- }
- #endif
- /* try to map tail right after this block */
- if (zend_mm_chunk_extend(heap, ptr, old_size, new_size)) {
- #if ZEND_MM_STAT || ZEND_MM_LIMIT
- heap->real_size += new_size - old_size;
- #endif
- #if ZEND_MM_STAT
- heap->real_peak = MAX(heap->real_peak, heap->real_size);
- heap->size += new_size - old_size;
- heap->peak = MAX(heap->peak, heap->size);
- #endif
- #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
- return ptr;
- }
- }
- }
- return zend_mm_realloc_slow(heap, ptr, size, MIN(old_size, copy_size) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
- }
- static zend_always_inline void *zend_mm_realloc_heap(zend_mm_heap *heap, void *ptr, size_t size, zend_bool use_copy_size, size_t copy_size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
- {
- size_t page_offset;
- size_t old_size;
- size_t new_size;
- void *ret;
- #if ZEND_DEBUG
- zend_mm_debug_info *dbg;
- #endif
- page_offset = ZEND_MM_ALIGNED_OFFSET(ptr, ZEND_MM_CHUNK_SIZE);
- if (UNEXPECTED(page_offset == 0)) {
- if (EXPECTED(ptr == NULL)) {
- return _zend_mm_alloc(heap, size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
- } else {
- return zend_mm_realloc_huge(heap, ptr, size, copy_size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
- }
- } else {
- zend_mm_chunk *chunk = (zend_mm_chunk*)ZEND_MM_ALIGNED_BASE(ptr, ZEND_MM_CHUNK_SIZE);
- int page_num = (int)(page_offset / ZEND_MM_PAGE_SIZE);
- zend_mm_page_info info = chunk->map[page_num];
- #if ZEND_DEBUG
- size_t real_size = size;
- size = ZEND_MM_ALIGNED_SIZE(size) + ZEND_MM_ALIGNED_SIZE(sizeof(zend_mm_debug_info));
- #endif
- ZEND_MM_CHECK(chunk->heap == heap, "zend_mm_heap corrupted");
- if (info & ZEND_MM_IS_SRUN) {
- int old_bin_num = ZEND_MM_SRUN_BIN_NUM(info);
- do {
- old_size = bin_data_size[old_bin_num];
- /* Check if requested size fits into current bin */
- if (size <= old_size) {
- /* Check if truncation is necessary */
- if (old_bin_num > 0 && size < bin_data_size[old_bin_num - 1]) {
- /* truncation */
- ret = zend_mm_alloc_small(heap, ZEND_MM_SMALL_SIZE_TO_BIN(size) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
- copy_size = use_copy_size ? MIN(size, copy_size) : size;
- memcpy(ret, ptr, copy_size);
- zend_mm_free_small(heap, ptr, old_bin_num);
- } else {
- /* reallocation in-place */
- ret = ptr;
- }
- } else if (size <= ZEND_MM_MAX_SMALL_SIZE) {
- /* small extension */
- #if ZEND_MM_STAT
- do {
- size_t orig_peak = heap->peak;
- #endif
- ret = zend_mm_alloc_small(heap, ZEND_MM_SMALL_SIZE_TO_BIN(size) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
- copy_size = use_copy_size ? MIN(old_size, copy_size) : old_size;
- memcpy(ret, ptr, copy_size);
- zend_mm_free_small(heap, ptr, old_bin_num);
- #if ZEND_MM_STAT
- heap->peak = MAX(orig_peak, heap->size);
- } while (0);
- #endif
- } else {
- /* slow reallocation */
- break;
- }
- #if ZEND_DEBUG
- dbg = zend_mm_get_debug_info(heap, ret);
- 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 ret;
- } while (0);
- } 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 &&…
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