1 /*
2 +----------------------------------------------------------------------+
3 | Zend Engine |
4 +----------------------------------------------------------------------+
5 | Copyright (c) 1998-2018 Zend Technologies Ltd. (http://www.zend.com) |
6 +----------------------------------------------------------------------+
7 | This source file is subject to version 2.00 of the Zend license, |
8 | that is bundled with this package in the file LICENSE, and is |
9 | available through the world-wide-web at the following url: |
10 | http://www.zend.com/license/2_00.txt. |
11 | If you did not receive a copy of the Zend license and are unable to |
12 | obtain it through the world-wide-web, please send a note to |
13 | license@zend.com so we can mail you a copy immediately. |
14 +----------------------------------------------------------------------+
15 | Authors: Andi Gutmans <andi@zend.com> |
16 | Zeev Suraski <zeev@zend.com> |
17 | Dmitry Stogov <dmitry@zend.com> |
18 +----------------------------------------------------------------------+
19 */
20
21 /* $Id$ */
22
23 /*
24 * zend_alloc is designed to be a modern CPU cache friendly memory manager
25 * for PHP. Most ideas are taken from jemalloc and tcmalloc implementations.
26 *
27 * All allocations are split into 3 categories:
28 *
29 * Huge - the size is greater than CHUNK size (~2M by default), allocation is
30 * performed using mmap(). The result is aligned on 2M boundary.
31 *
32 * Large - a number of 4096K pages inside a CHUNK. Large blocks
33 * are always aligned on page boundary.
34 *
35 * Small - less than 3/4 of page size. Small sizes are rounded up to nearest
36 * greater predefined small size (there are 30 predefined sizes:
37 * 8, 16, 24, 32, ... 3072). Small blocks are allocated from
38 * RUNs. Each RUN is allocated as a single or few following pages.
39 * Allocation inside RUNs implemented using linked list of free
40 * elements. The result is aligned to 8 bytes.
41 *
42 * zend_alloc allocates memory from OS by CHUNKs, these CHUNKs and huge memory
43 * blocks are always aligned to CHUNK boundary. So it's very easy to determine
44 * the CHUNK owning the certain pointer. Regular CHUNKs reserve a single
45 * page at start for special purpose. It contains bitset of free pages,
46 * few bitset for available runs of predefined small sizes, map of pages that
47 * keeps information about usage of each page in this CHUNK, etc.
48 *
49 * zend_alloc provides familiar emalloc/efree/erealloc API, but in addition it
50 * provides specialized and optimized routines to allocate blocks of predefined
51 * sizes (e.g. emalloc_2(), emallc_4(), ..., emalloc_large(), etc)
52 * The library uses C preprocessor tricks that substitute calls to emalloc()
53 * with more specialized routines when the requested size is known.
54 */
55
56 #include "zend.h"
57 #include "zend_alloc.h"
58 #include "zend_globals.h"
59 #include "zend_operators.h"
60 #include "zend_multiply.h"
61 #include "zend_bitset.h"
62
63 #ifdef HAVE_SIGNAL_H
64 # include <signal.h>
65 #endif
66 #ifdef HAVE_UNISTD_H
67 # include <unistd.h>
68 #endif
69
70 #ifdef ZEND_WIN32
71 # include <wincrypt.h>
72 # include <process.h>
73 #endif
74
75 #include <stdio.h>
76 #include <stdlib.h>
77 #include <string.h>
78
79 #include <sys/types.h>
80 #include <sys/stat.h>
81 #if HAVE_LIMITS_H
82 #include <limits.h>
83 #endif
84 #include <fcntl.h>
85 #include <errno.h>
86
87 #ifndef _WIN32
88 # ifdef HAVE_MREMAP
89 # ifndef _GNU_SOURCE
90 # define _GNU_SOURCE
91 # endif
92 # ifndef __USE_GNU
93 # define __USE_GNU
94 # endif
95 # endif
96 # include <sys/mman.h>
97 # ifndef MAP_ANON
98 # ifdef MAP_ANONYMOUS
99 # define MAP_ANON MAP_ANONYMOUS
100 # endif
101 # endif
102 # ifndef MREMAP_MAYMOVE
103 # define MREMAP_MAYMOVE 0
104 # endif
105 # ifndef MAP_FAILED
106 # define MAP_FAILED ((void*)-1)
107 # endif
108 # ifndef MAP_POPULATE
109 # define MAP_POPULATE 0
110 # endif
111 # if defined(_SC_PAGESIZE) || (_SC_PAGE_SIZE)
112 # define REAL_PAGE_SIZE _real_page_size
113 static size_t _real_page_size = ZEND_MM_PAGE_SIZE;
114 # endif
115 #endif
116
117 #ifndef REAL_PAGE_SIZE
118 # define REAL_PAGE_SIZE ZEND_MM_PAGE_SIZE
119 #endif
120
121 #ifndef ZEND_MM_STAT
122 # define ZEND_MM_STAT 1 /* track current and peak memory usage */
123 #endif
124 #ifndef ZEND_MM_LIMIT
125 # define ZEND_MM_LIMIT 1 /* support for user-defined memory limit */
126 #endif
127 #ifndef ZEND_MM_CUSTOM
128 # define ZEND_MM_CUSTOM 1 /* support for custom memory allocator */
129 /* USE_ZEND_ALLOC=0 may switch to system malloc() */
130 #endif
131 #ifndef ZEND_MM_STORAGE
132 # define ZEND_MM_STORAGE 1 /* support for custom memory storage */
133 #endif
134 #ifndef ZEND_MM_ERROR
135 # define ZEND_MM_ERROR 1 /* report system errors */
136 #endif
137
138 #ifndef ZEND_MM_CHECK
139 # define ZEND_MM_CHECK(condition, message) do { \
140 if (UNEXPECTED(!(condition))) { \
141 zend_mm_panic(message); \
142 } \
143 } while (0)
144 #endif
145
146 typedef uint32_t zend_mm_page_info; /* 4-byte integer */
147 typedef zend_ulong zend_mm_bitset; /* 4-byte or 8-byte integer */
148
149 #define ZEND_MM_ALIGNED_OFFSET(size, alignment) \
150 (((size_t)(size)) & ((alignment) - 1))
151 #define ZEND_MM_ALIGNED_BASE(size, alignment) \
152 (((size_t)(size)) & ~((alignment) - 1))
153 #define ZEND_MM_SIZE_TO_NUM(size, alignment) \
154 (((size_t)(size) + ((alignment) - 1)) / (alignment))
155
156 #define ZEND_MM_BITSET_LEN (sizeof(zend_mm_bitset) * 8) /* 32 or 64 */
157 #define ZEND_MM_PAGE_MAP_LEN (ZEND_MM_PAGES / ZEND_MM_BITSET_LEN) /* 16 or 8 */
158
159 typedef zend_mm_bitset zend_mm_page_map[ZEND_MM_PAGE_MAP_LEN]; /* 64B */
160
161 #define ZEND_MM_IS_FRUN 0x00000000
162 #define ZEND_MM_IS_LRUN 0x40000000
163 #define ZEND_MM_IS_SRUN 0x80000000
164
165 #define ZEND_MM_LRUN_PAGES_MASK 0x000003ff
166 #define ZEND_MM_LRUN_PAGES_OFFSET 0
167
168 #define ZEND_MM_SRUN_BIN_NUM_MASK 0x0000001f
169 #define ZEND_MM_SRUN_BIN_NUM_OFFSET 0
170
171 #define ZEND_MM_SRUN_FREE_COUNTER_MASK 0x01ff0000
172 #define ZEND_MM_SRUN_FREE_COUNTER_OFFSET 16
173
174 #define ZEND_MM_NRUN_OFFSET_MASK 0x01ff0000
175 #define ZEND_MM_NRUN_OFFSET_OFFSET 16
176
177 #define ZEND_MM_LRUN_PAGES(info) (((info) & ZEND_MM_LRUN_PAGES_MASK) >> ZEND_MM_LRUN_PAGES_OFFSET)
178 #define ZEND_MM_SRUN_BIN_NUM(info) (((info) & ZEND_MM_SRUN_BIN_NUM_MASK) >> ZEND_MM_SRUN_BIN_NUM_OFFSET)
179 #define ZEND_MM_SRUN_FREE_COUNTER(info) (((info) & ZEND_MM_SRUN_FREE_COUNTER_MASK) >> ZEND_MM_SRUN_FREE_COUNTER_OFFSET)
180 #define ZEND_MM_NRUN_OFFSET(info) (((info) & ZEND_MM_NRUN_OFFSET_MASK) >> ZEND_MM_NRUN_OFFSET_OFFSET)
181
182 #define ZEND_MM_FRUN() ZEND_MM_IS_FRUN
183 #define ZEND_MM_LRUN(count) (ZEND_MM_IS_LRUN | ((count) << ZEND_MM_LRUN_PAGES_OFFSET))
184 #define ZEND_MM_SRUN(bin_num) (ZEND_MM_IS_SRUN | ((bin_num) << ZEND_MM_SRUN_BIN_NUM_OFFSET))
185 #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))
186 #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))
187
188 #define ZEND_MM_BINS 30
189
190 typedef struct _zend_mm_page zend_mm_page;
191 typedef struct _zend_mm_bin zend_mm_bin;
192 typedef struct _zend_mm_free_slot zend_mm_free_slot;
193 typedef struct _zend_mm_chunk zend_mm_chunk;
194 typedef struct _zend_mm_huge_list zend_mm_huge_list;
195
196 int zend_mm_use_huge_pages = 0;
197
198 /*
199 * Memory is retrived from OS by chunks of fixed size 2MB.
200 * Inside chunk it's managed by pages of fixed size 4096B.
201 * So each chunk consists from 512 pages.
202 * The first page of each chunk is reseved for chunk header.
203 * It contains service information about all pages.
204 *
205 * free_pages - current number of free pages in this chunk
206 *
207 * free_tail - number of continuous free pages at the end of chunk
208 *
209 * free_map - bitset (a bit for each page). The bit is set if the corresponding
210 * page is allocated. Allocator for "lage sizes" may easily find a
211 * free page (or a continuous number of pages) searching for zero
212 * bits.
213 *
214 * map - contains service information for each page. (32-bits for each
215 * page).
216 * usage:
217 * (2 bits)
218 * FRUN - free page,
219 * LRUN - first page of "large" allocation
220 * SRUN - first page of a bin used for "small" allocation
221 *
222 * lrun_pages:
223 * (10 bits) number of allocated pages
224 *
225 * srun_bin_num:
226 * (5 bits) bin number (e.g. 0 for sizes 0-2, 1 for 3-4,
227 * 2 for 5-8, 3 for 9-16 etc) see zend_alloc_sizes.h
228 */
229
230 struct _zend_mm_heap {
231 #if ZEND_MM_CUSTOM
232 int use_custom_heap;
233 #endif
234 #if ZEND_MM_STORAGE
235 zend_mm_storage *storage;
236 #endif
237 #if ZEND_MM_STAT
238 size_t size; /* current memory usage */
239 size_t peak; /* peak memory usage */
240 #endif
241 zend_mm_free_slot *free_slot[ZEND_MM_BINS]; /* free lists for small sizes */
242 #if ZEND_MM_STAT || ZEND_MM_LIMIT
243 size_t real_size; /* current size of allocated pages */
244 #endif
245 #if ZEND_MM_STAT
246 size_t real_peak; /* peak size of allocated pages */
247 #endif
248 #if ZEND_MM_LIMIT
249 size_t limit; /* memory limit */
250 int overflow; /* memory overflow flag */
251 #endif
252
253 zend_mm_huge_list *huge_list; /* list of huge allocated blocks */
254
255 zend_mm_chunk *main_chunk;
256 zend_mm_chunk *cached_chunks; /* list of unused chunks */
257 int chunks_count; /* number of alocated chunks */
258 int peak_chunks_count; /* peak number of allocated chunks for current request */
259 int cached_chunks_count; /* number of cached chunks */
260 double avg_chunks_count; /* average number of chunks allocated per request */
261 int last_chunks_delete_boundary; /* numer of chunks after last deletion */
262 int last_chunks_delete_count; /* number of deletion over the last boundary */
263 #if ZEND_MM_CUSTOM
264 union {
265 struct {
266 void *(*_malloc)(size_t);
267 void (*_free)(void*);
268 void *(*_realloc)(void*, size_t);
269 } std;
270 struct {
271 void *(*_malloc)(size_t ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC);
272 void (*_free)(void* ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC);
273 void *(*_realloc)(void*, size_t ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC);
274 } debug;
275 } custom_heap;
276 #endif
277 };
278
279 struct _zend_mm_chunk {
280 zend_mm_heap *heap;
281 zend_mm_chunk *next;
282 zend_mm_chunk *prev;
283 uint32_t free_pages; /* number of free pages */
284 uint32_t free_tail; /* number of free pages at the end of chunk */
285 uint32_t num;
286 char reserve[64 - (sizeof(void*) * 3 + sizeof(uint32_t) * 3)];
287 zend_mm_heap heap_slot; /* used only in main chunk */
288 zend_mm_page_map free_map; /* 512 bits or 64 bytes */
289 zend_mm_page_info map[ZEND_MM_PAGES]; /* 2 KB = 512 * 4 */
290 };
291
292 struct _zend_mm_page {
293 char bytes[ZEND_MM_PAGE_SIZE];
294 };
295
296 /*
297 * bin - is one or few continuous pages (up to 8) used for allocation of
298 * a particular "small size".
299 */
300 struct _zend_mm_bin {
301 char bytes[ZEND_MM_PAGE_SIZE * 8];
302 };
303
304 struct _zend_mm_free_slot {
305 zend_mm_free_slot *next_free_slot;
306 };
307
308 struct _zend_mm_huge_list {
309 void *ptr;
310 size_t size;
311 zend_mm_huge_list *next;
312 #if ZEND_DEBUG
313 zend_mm_debug_info dbg;
314 #endif
315 };
316
317 #define ZEND_MM_PAGE_ADDR(chunk, page_num) \
318 ((void*)(((zend_mm_page*)(chunk)) + (page_num)))
319
320 #define _BIN_DATA_SIZE(num, size, elements, pages, x, y) size,
321 static const uint32_t bin_data_size[] = {
322 ZEND_MM_BINS_INFO(_BIN_DATA_SIZE, x, y)
323 };
324
325 #define _BIN_DATA_ELEMENTS(num, size, elements, pages, x, y) elements,
326 static const uint32_t bin_elements[] = {
327 ZEND_MM_BINS_INFO(_BIN_DATA_ELEMENTS, x, y)
328 };
329
330 #define _BIN_DATA_PAGES(num, size, elements, pages, x, y) pages,
331 static const uint32_t bin_pages[] = {
332 ZEND_MM_BINS_INFO(_BIN_DATA_PAGES, x, y)
333 };
334
335 #if ZEND_DEBUG
zend_debug_alloc_output(char * format,...)336 ZEND_COLD void zend_debug_alloc_output(char *format, ...)
337 {
338 char output_buf[256];
339 va_list args;
340
341 va_start(args, format);
342 vsprintf(output_buf, format, args);
343 va_end(args);
344
345 #ifdef ZEND_WIN32
346 OutputDebugString(output_buf);
347 #else
348 fprintf(stderr, "%s", output_buf);
349 #endif
350 }
351 #endif
352
zend_mm_panic(const char * message)353 static ZEND_COLD ZEND_NORETURN void zend_mm_panic(const char *message)
354 {
355 fprintf(stderr, "%s\n", message);
356 /* See http://support.microsoft.com/kb/190351 */
357 #ifdef ZEND_WIN32
358 fflush(stderr);
359 #endif
360 #if ZEND_DEBUG && defined(HAVE_KILL) && defined(HAVE_GETPID)
361 kill(getpid(), SIGSEGV);
362 #endif
363 exit(1);
364 }
365
zend_mm_safe_error(zend_mm_heap * heap,const char * format,size_t limit,const char * filename,uint32_t lineno,size_t size)366 static ZEND_COLD ZEND_NORETURN void zend_mm_safe_error(zend_mm_heap *heap,
367 const char *format,
368 size_t limit,
369 #if ZEND_DEBUG
370 const char *filename,
371 uint32_t lineno,
372 #endif
373 size_t size)
374 {
375
376 heap->overflow = 1;
377 zend_try {
378 zend_error_noreturn(E_ERROR,
379 format,
380 limit,
381 #if ZEND_DEBUG
382 filename,
383 lineno,
384 #endif
385 size);
386 } zend_catch {
387 } zend_end_try();
388 heap->overflow = 0;
389 zend_bailout();
390 exit(1);
391 }
392
393 #ifdef _WIN32
394 void
stderr_last_error(char * msg)395 stderr_last_error(char *msg)
396 {
397 LPSTR buf = NULL;
398 DWORD err = GetLastError();
399
400 if (!FormatMessage(
401 FORMAT_MESSAGE_ALLOCATE_BUFFER |
402 FORMAT_MESSAGE_FROM_SYSTEM |
403 FORMAT_MESSAGE_IGNORE_INSERTS,
404 NULL,
405 err,
406 MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
407 (LPSTR)&buf,
408 0, NULL)) {
409 fprintf(stderr, "\n%s: [0x%08lx]\n", msg, err);
410 }
411 else {
412 fprintf(stderr, "\n%s: [0x%08lx] %s\n", msg, err, buf);
413 }
414 }
415 #endif
416
417 /*****************/
418 /* OS Allocation */
419 /*****************/
420
zend_mm_mmap_fixed(void * addr,size_t size)421 static void *zend_mm_mmap_fixed(void *addr, size_t size)
422 {
423 #ifdef _WIN32
424 return VirtualAlloc(addr, size, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);
425 #else
426 /* MAP_FIXED leads to discarding of the old mapping, so it can't be used. */
427 void *ptr = mmap(addr, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON /*| MAP_POPULATE | MAP_HUGETLB*/, -1, 0);
428
429 if (ptr == MAP_FAILED) {
430 #if ZEND_MM_ERROR
431 fprintf(stderr, "\nmmap() failed: [%d] %s\n", errno, strerror(errno));
432 #endif
433 return NULL;
434 } else if (ptr != addr) {
435 if (munmap(ptr, size) != 0) {
436 #if ZEND_MM_ERROR
437 fprintf(stderr, "\nmunmap() failed: [%d] %s\n", errno, strerror(errno));
438 #endif
439 }
440 return NULL;
441 }
442 return ptr;
443 #endif
444 }
445
zend_mm_mmap(size_t size)446 static void *zend_mm_mmap(size_t size)
447 {
448 #ifdef _WIN32
449 void *ptr = VirtualAlloc(NULL, size, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);
450
451 if (ptr == NULL) {
452 #if ZEND_MM_ERROR
453 stderr_last_error("VirtualAlloc() failed");
454 #endif
455 return NULL;
456 }
457 return ptr;
458 #else
459 void *ptr;
460
461 #ifdef MAP_HUGETLB
462 if (zend_mm_use_huge_pages && size == ZEND_MM_CHUNK_SIZE) {
463 ptr = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON | MAP_HUGETLB, -1, 0);
464 if (ptr != MAP_FAILED) {
465 return ptr;
466 }
467 }
468 #endif
469
470 ptr = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON, -1, 0);
471
472 if (ptr == MAP_FAILED) {
473 #if ZEND_MM_ERROR
474 fprintf(stderr, "\nmmap() failed: [%d] %s\n", errno, strerror(errno));
475 #endif
476 return NULL;
477 }
478 return ptr;
479 #endif
480 }
481
zend_mm_munmap(void * addr,size_t size)482 static void zend_mm_munmap(void *addr, size_t size)
483 {
484 #ifdef _WIN32
485 if (VirtualFree(addr, 0, MEM_RELEASE) == 0) {
486 #if ZEND_MM_ERROR
487 stderr_last_error("VirtualFree() failed");
488 #endif
489 }
490 #else
491 if (munmap(addr, size) != 0) {
492 #if ZEND_MM_ERROR
493 fprintf(stderr, "\nmunmap() failed: [%d] %s\n", errno, strerror(errno));
494 #endif
495 }
496 #endif
497 }
498
499 /***********/
500 /* Bitmask */
501 /***********/
502
503 /* number of trailing set (1) bits */
zend_mm_bitset_nts(zend_mm_bitset bitset)504 static zend_always_inline int zend_mm_bitset_nts(zend_mm_bitset bitset)
505 {
506 #if (defined(__GNUC__) || __has_builtin(__builtin_ctzl)) && SIZEOF_ZEND_LONG == SIZEOF_LONG && defined(PHP_HAVE_BUILTIN_CTZL)
507 return __builtin_ctzl(~bitset);
508 #elif (defined(__GNUC__) || __has_builtin(__builtin_ctzll)) && defined(PHP_HAVE_BUILTIN_CTZLL)
509 return __builtin_ctzll(~bitset);
510 #elif defined(_WIN32)
511 unsigned long index;
512
513 #if defined(_WIN64)
514 if (!BitScanForward64(&index, ~bitset)) {
515 #else
516 if (!BitScanForward(&index, ~bitset)) {
517 #endif
518 /* undefined behavior */
519 return 32;
520 }
521
522 return (int)index;
523 #else
524 int n;
525
526 if (bitset == (zend_mm_bitset)-1) return ZEND_MM_BITSET_LEN;
527
528 n = 0;
529 #if SIZEOF_ZEND_LONG == 8
530 if (sizeof(zend_mm_bitset) == 8) {
531 if ((bitset & 0xffffffff) == 0xffffffff) {n += 32; bitset = bitset >> Z_UL(32);}
532 }
533 #endif
534 if ((bitset & 0x0000ffff) == 0x0000ffff) {n += 16; bitset = bitset >> 16;}
535 if ((bitset & 0x000000ff) == 0x000000ff) {n += 8; bitset = bitset >> 8;}
536 if ((bitset & 0x0000000f) == 0x0000000f) {n += 4; bitset = bitset >> 4;}
537 if ((bitset & 0x00000003) == 0x00000003) {n += 2; bitset = bitset >> 2;}
538 return n + (bitset & 1);
539 #endif
540 }
541
542 static zend_always_inline int zend_mm_bitset_find_zero(zend_mm_bitset *bitset, int size)
543 {
544 int i = 0;
545
546 do {
547 zend_mm_bitset tmp = bitset[i];
548 if (tmp != (zend_mm_bitset)-1) {
549 return i * ZEND_MM_BITSET_LEN + zend_mm_bitset_nts(tmp);
550 }
551 i++;
552 } while (i < size);
553 return -1;
554 }
555
556 static zend_always_inline int zend_mm_bitset_find_one(zend_mm_bitset *bitset, int size)
557 {
558 int i = 0;
559
560 do {
561 zend_mm_bitset tmp = bitset[i];
562 if (tmp != 0) {
563 return i * ZEND_MM_BITSET_LEN + zend_ulong_ntz(tmp);
564 }
565 i++;
566 } while (i < size);
567 return -1;
568 }
569
570 static zend_always_inline int zend_mm_bitset_find_zero_and_set(zend_mm_bitset *bitset, int size)
571 {
572 int i = 0;
573
574 do {
575 zend_mm_bitset tmp = bitset[i];
576 if (tmp != (zend_mm_bitset)-1) {
577 int n = zend_mm_bitset_nts(tmp);
578 bitset[i] |= Z_UL(1) << n;
579 return i * ZEND_MM_BITSET_LEN + n;
580 }
581 i++;
582 } while (i < size);
583 return -1;
584 }
585
586 static zend_always_inline int zend_mm_bitset_is_set(zend_mm_bitset *bitset, int bit)
587 {
588 return (bitset[bit / ZEND_MM_BITSET_LEN] & (Z_L(1) << (bit & (ZEND_MM_BITSET_LEN-1)))) != 0;
589 }
590
591 static zend_always_inline void zend_mm_bitset_set_bit(zend_mm_bitset *bitset, int bit)
592 {
593 bitset[bit / ZEND_MM_BITSET_LEN] |= (Z_L(1) << (bit & (ZEND_MM_BITSET_LEN-1)));
594 }
595
596 static zend_always_inline void zend_mm_bitset_reset_bit(zend_mm_bitset *bitset, int bit)
597 {
598 bitset[bit / ZEND_MM_BITSET_LEN] &= ~(Z_L(1) << (bit & (ZEND_MM_BITSET_LEN-1)));
599 }
600
601 static zend_always_inline void zend_mm_bitset_set_range(zend_mm_bitset *bitset, int start, int len)
602 {
603 if (len == 1) {
604 zend_mm_bitset_set_bit(bitset, start);
605 } else {
606 int pos = start / ZEND_MM_BITSET_LEN;
607 int end = (start + len - 1) / ZEND_MM_BITSET_LEN;
608 int bit = start & (ZEND_MM_BITSET_LEN - 1);
609 zend_mm_bitset tmp;
610
611 if (pos != end) {
612 /* set bits from "bit" to ZEND_MM_BITSET_LEN-1 */
613 tmp = (zend_mm_bitset)-1 << bit;
614 bitset[pos++] |= tmp;
615 while (pos != end) {
616 /* set all bits */
617 bitset[pos++] = (zend_mm_bitset)-1;
618 }
619 end = (start + len - 1) & (ZEND_MM_BITSET_LEN - 1);
620 /* set bits from "0" to "end" */
621 tmp = (zend_mm_bitset)-1 >> ((ZEND_MM_BITSET_LEN - 1) - end);
622 bitset[pos] |= tmp;
623 } else {
624 end = (start + len - 1) & (ZEND_MM_BITSET_LEN - 1);
625 /* set bits from "bit" to "end" */
626 tmp = (zend_mm_bitset)-1 << bit;
627 tmp &= (zend_mm_bitset)-1 >> ((ZEND_MM_BITSET_LEN - 1) - end);
628 bitset[pos] |= tmp;
629 }
630 }
631 }
632
633 static zend_always_inline void zend_mm_bitset_reset_range(zend_mm_bitset *bitset, int start, int len)
634 {
635 if (len == 1) {
636 zend_mm_bitset_reset_bit(bitset, start);
637 } else {
638 int pos = start / ZEND_MM_BITSET_LEN;
639 int end = (start + len - 1) / ZEND_MM_BITSET_LEN;
640 int bit = start & (ZEND_MM_BITSET_LEN - 1);
641 zend_mm_bitset tmp;
642
643 if (pos != end) {
644 /* reset bits from "bit" to ZEND_MM_BITSET_LEN-1 */
645 tmp = ~((Z_L(1) << bit) - 1);
646 bitset[pos++] &= ~tmp;
647 while (pos != end) {
648 /* set all bits */
649 bitset[pos++] = 0;
650 }
651 end = (start + len - 1) & (ZEND_MM_BITSET_LEN - 1);
652 /* reset bits from "0" to "end" */
653 tmp = (zend_mm_bitset)-1 >> ((ZEND_MM_BITSET_LEN - 1) - end);
654 bitset[pos] &= ~tmp;
655 } else {
656 end = (start + len - 1) & (ZEND_MM_BITSET_LEN - 1);
657 /* reset bits from "bit" to "end" */
658 tmp = (zend_mm_bitset)-1 << bit;
659 tmp &= (zend_mm_bitset)-1 >> ((ZEND_MM_BITSET_LEN - 1) - end);
660 bitset[pos] &= ~tmp;
661 }
662 }
663 }
664
665 static zend_always_inline int zend_mm_bitset_is_free_range(zend_mm_bitset *bitset, int start, int len)
666 {
667 if (len == 1) {
668 return !zend_mm_bitset_is_set(bitset, start);
669 } else {
670 int pos = start / ZEND_MM_BITSET_LEN;
671 int end = (start + len - 1) / ZEND_MM_BITSET_LEN;
672 int bit = start & (ZEND_MM_BITSET_LEN - 1);
673 zend_mm_bitset tmp;
674
675 if (pos != end) {
676 /* set bits from "bit" to ZEND_MM_BITSET_LEN-1 */
677 tmp = (zend_mm_bitset)-1 << bit;
678 if ((bitset[pos++] & tmp) != 0) {
679 return 0;
680 }
681 while (pos != end) {
682 /* set all bits */
683 if (bitset[pos++] != 0) {
684 return 0;
685 }
686 }
687 end = (start + len - 1) & (ZEND_MM_BITSET_LEN - 1);
688 /* set bits from "0" to "end" */
689 tmp = (zend_mm_bitset)-1 >> ((ZEND_MM_BITSET_LEN - 1) - end);
690 return (bitset[pos] & tmp) == 0;
691 } else {
692 end = (start + len - 1) & (ZEND_MM_BITSET_LEN - 1);
693 /* set bits from "bit" to "end" */
694 tmp = (zend_mm_bitset)-1 << bit;
695 tmp &= (zend_mm_bitset)-1 >> ((ZEND_MM_BITSET_LEN - 1) - end);
696 return (bitset[pos] & tmp) == 0;
697 }
698 }
699 }
700
701 /**********/
702 /* Chunks */
703 /**********/
704
705 static void *zend_mm_chunk_alloc_int(size_t size, size_t alignment)
706 {
707 void *ptr = zend_mm_mmap(size);
708
709 if (ptr == NULL) {
710 return NULL;
711 } else if (ZEND_MM_ALIGNED_OFFSET(ptr, alignment) == 0) {
712 #ifdef MADV_HUGEPAGE
713 if (zend_mm_use_huge_pages) {
714 madvise(ptr, size, MADV_HUGEPAGE);
715 }
716 #endif
717 return ptr;
718 } else {
719 size_t offset;
720
721 /* chunk has to be aligned */
722 zend_mm_munmap(ptr, size);
723 ptr = zend_mm_mmap(size + alignment - REAL_PAGE_SIZE);
724 #ifdef _WIN32
725 offset = ZEND_MM_ALIGNED_OFFSET(ptr, alignment);
726 zend_mm_munmap(ptr, size + alignment - REAL_PAGE_SIZE);
727 ptr = zend_mm_mmap_fixed((void*)((char*)ptr + (alignment - offset)), size);
728 offset = ZEND_MM_ALIGNED_OFFSET(ptr, alignment);
729 if (offset != 0) {
730 zend_mm_munmap(ptr, size);
731 return NULL;
732 }
733 return ptr;
734 #else
735 offset = ZEND_MM_ALIGNED_OFFSET(ptr, alignment);
736 if (offset != 0) {
737 offset = alignment - offset;
738 zend_mm_munmap(ptr, offset);
739 ptr = (char*)ptr + offset;
740 alignment -= offset;
741 }
742 if (alignment > REAL_PAGE_SIZE) {
743 zend_mm_munmap((char*)ptr + size, alignment - REAL_PAGE_SIZE);
744 }
745 # ifdef MADV_HUGEPAGE
746 if (zend_mm_use_huge_pages) {
747 madvise(ptr, size, MADV_HUGEPAGE);
748 }
749 # endif
750 #endif
751 return ptr;
752 }
753 }
754
755 static void *zend_mm_chunk_alloc(zend_mm_heap *heap, size_t size, size_t alignment)
756 {
757 #if ZEND_MM_STORAGE
758 if (UNEXPECTED(heap->storage)) {
759 void *ptr = heap->storage->handlers.chunk_alloc(heap->storage, size, alignment);
760 ZEND_ASSERT(((zend_uintptr_t)((char*)ptr + (alignment-1)) & (alignment-1)) == (zend_uintptr_t)ptr);
761 return ptr;
762 }
763 #endif
764 return zend_mm_chunk_alloc_int(size, alignment);
765 }
766
767 static void zend_mm_chunk_free(zend_mm_heap *heap, void *addr, size_t size)
768 {
769 #if ZEND_MM_STORAGE
770 if (UNEXPECTED(heap->storage)) {
771 heap->storage->handlers.chunk_free(heap->storage, addr, size);
772 return;
773 }
774 #endif
775 zend_mm_munmap(addr, size);
776 }
777
778 static int zend_mm_chunk_truncate(zend_mm_heap *heap, void *addr, size_t old_size, size_t new_size)
779 {
780 #if ZEND_MM_STORAGE
781 if (UNEXPECTED(heap->storage)) {
782 if (heap->storage->handlers.chunk_truncate) {
783 return heap->storage->handlers.chunk_truncate(heap->storage, addr, old_size, new_size);
784 } else {
785 return 0;
786 }
787 }
788 #endif
789 #ifndef _WIN32
790 zend_mm_munmap((char*)addr + new_size, old_size - new_size);
791 return 1;
792 #else
793 return 0;
794 #endif
795 }
796
797 static int zend_mm_chunk_extend(zend_mm_heap *heap, void *addr, size_t old_size, size_t new_size)
798 {
799 #if ZEND_MM_STORAGE
800 if (UNEXPECTED(heap->storage)) {
801 if (heap->storage->handlers.chunk_extend) {
802 return heap->storage->handlers.chunk_extend(heap->storage, addr, old_size, new_size);
803 } else {
804 return 0;
805 }
806 }
807 #endif
808 #ifndef _WIN32
809 return (zend_mm_mmap_fixed((char*)addr + old_size, new_size - old_size) != NULL);
810 #else
811 return 0;
812 #endif
813 }
814
815 static zend_always_inline void zend_mm_chunk_init(zend_mm_heap *heap, zend_mm_chunk *chunk)
816 {
817 chunk->heap = heap;
818 chunk->next = heap->main_chunk;
819 chunk->prev = heap->main_chunk->prev;
820 chunk->prev->next = chunk;
821 chunk->next->prev = chunk;
822 /* mark first pages as allocated */
823 chunk->free_pages = ZEND_MM_PAGES - ZEND_MM_FIRST_PAGE;
824 chunk->free_tail = ZEND_MM_FIRST_PAGE;
825 /* the younger chunks have bigger number */
826 chunk->num = chunk->prev->num + 1;
827 /* mark first pages as allocated */
828 chunk->free_map[0] = (1L << ZEND_MM_FIRST_PAGE) - 1;
829 chunk->map[0] = ZEND_MM_LRUN(ZEND_MM_FIRST_PAGE);
830 }
831
832 /***********************/
833 /* Huge Runs (forward) */
834 /***********************/
835
836 static size_t zend_mm_get_huge_block_size(zend_mm_heap *heap, void *ptr ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC);
837 static void *zend_mm_alloc_huge(zend_mm_heap *heap, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC);
838 static void zend_mm_free_huge(zend_mm_heap *heap, void *ptr ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC);
839
840 #if ZEND_DEBUG
841 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);
842 #else
843 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);
844 #endif
845
846 /**************/
847 /* Large Runs */
848 /**************/
849
850 #if ZEND_DEBUG
851 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)
852 #else
853 static void *zend_mm_alloc_pages(zend_mm_heap *heap, uint32_t pages_count ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
854 #endif
855 {
856 zend_mm_chunk *chunk = heap->main_chunk;
857 uint32_t page_num, len;
858 int steps = 0;
859
860 while (1) {
861 if (UNEXPECTED(chunk->free_pages < pages_count)) {
862 goto not_found;
863 #if 0
864 } else if (UNEXPECTED(chunk->free_pages + chunk->free_tail == ZEND_MM_PAGES)) {
865 if (UNEXPECTED(ZEND_MM_PAGES - chunk->free_tail < pages_count)) {
866 goto not_found;
867 } else {
868 page_num = chunk->free_tail;
869 goto found;
870 }
871 } else if (0) {
872 /* First-Fit Search */
873 int free_tail = chunk->free_tail;
874 zend_mm_bitset *bitset = chunk->free_map;
875 zend_mm_bitset tmp = *(bitset++);
876 int i = 0;
877
878 while (1) {
879 /* skip allocated blocks */
880 while (tmp == (zend_mm_bitset)-1) {
881 i += ZEND_MM_BITSET_LEN;
882 if (i == ZEND_MM_PAGES) {
883 goto not_found;
884 }
885 tmp = *(bitset++);
886 }
887 /* find first 0 bit */
888 page_num = i + zend_mm_bitset_nts(tmp);
889 /* reset bits from 0 to "bit" */
890 tmp &= tmp + 1;
891 /* skip free blocks */
892 while (tmp == 0) {
893 i += ZEND_MM_BITSET_LEN;
894 len = i - page_num;
895 if (len >= pages_count) {
896 goto found;
897 } else if (i >= free_tail) {
898 goto not_found;
899 }
900 tmp = *(bitset++);
901 }
902 /* find first 1 bit */
903 len = (i + zend_ulong_ntz(tmp)) - page_num;
904 if (len >= pages_count) {
905 goto found;
906 }
907 /* set bits from 0 to "bit" */
908 tmp |= tmp - 1;
909 }
910 #endif
911 } else {
912 /* Best-Fit Search */
913 int best = -1;
914 uint32_t best_len = ZEND_MM_PAGES;
915 uint32_t free_tail = chunk->free_tail;
916 zend_mm_bitset *bitset = chunk->free_map;
917 zend_mm_bitset tmp = *(bitset++);
918 uint32_t i = 0;
919
920 while (1) {
921 /* skip allocated blocks */
922 while (tmp == (zend_mm_bitset)-1) {
923 i += ZEND_MM_BITSET_LEN;
924 if (i == ZEND_MM_PAGES) {
925 if (best > 0) {
926 page_num = best;
927 goto found;
928 } else {
929 goto not_found;
930 }
931 }
932 tmp = *(bitset++);
933 }
934 /* find first 0 bit */
935 page_num = i + zend_mm_bitset_nts(tmp);
936 /* reset bits from 0 to "bit" */
937 tmp &= tmp + 1;
938 /* skip free blocks */
939 while (tmp == 0) {
940 i += ZEND_MM_BITSET_LEN;
941 if (i >= free_tail || i == ZEND_MM_PAGES) {
942 len = ZEND_MM_PAGES - page_num;
943 if (len >= pages_count && len < best_len) {
944 chunk->free_tail = page_num + pages_count;
945 goto found;
946 } else {
947 /* set accurate value */
948 chunk->free_tail = page_num;
949 if (best > 0) {
950 page_num = best;
951 goto found;
952 } else {
953 goto not_found;
954 }
955 }
956 }
957 tmp = *(bitset++);
958 }
959 /* find first 1 bit */
960 len = i + zend_ulong_ntz(tmp) - page_num;
961 if (len >= pages_count) {
962 if (len == pages_count) {
963 goto found;
964 } else if (len < best_len) {
965 best_len = len;
966 best = page_num;
967 }
968 }
969 /* set bits from 0 to "bit" */
970 tmp |= tmp - 1;
971 }
972 }
973
974 not_found:
975 if (chunk->next == heap->main_chunk) {
976 get_chunk:
977 if (heap->cached_chunks) {
978 heap->cached_chunks_count--;
979 chunk = heap->cached_chunks;
980 heap->cached_chunks = chunk->next;
981 } else {
982 #if ZEND_MM_LIMIT
983 if (UNEXPECTED(ZEND_MM_CHUNK_SIZE > heap->limit - heap->real_size)) {
984 if (zend_mm_gc(heap)) {
985 goto get_chunk;
986 } else if (heap->overflow == 0) {
987 #if ZEND_DEBUG
988 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);
989 #else
990 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);
991 #endif
992 return NULL;
993 }
994 }
995 #endif
996 chunk = (zend_mm_chunk*)zend_mm_chunk_alloc(heap, ZEND_MM_CHUNK_SIZE, ZEND_MM_CHUNK_SIZE);
997 if (UNEXPECTED(chunk == NULL)) {
998 /* insufficient memory */
999 if (zend_mm_gc(heap) &&
1000 (chunk = (zend_mm_chunk*)zend_mm_chunk_alloc(heap, ZEND_MM_CHUNK_SIZE, ZEND_MM_CHUNK_SIZE)) != NULL) {
1001 /* pass */
1002 } else {
1003 #if !ZEND_MM_LIMIT
1004 zend_mm_safe_error(heap, "Out of memory");
1005 #elif ZEND_DEBUG
1006 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);
1007 #else
1008 zend_mm_safe_error(heap, "Out of memory (allocated %zu) (tried to allocate %zu bytes)", heap->real_size, ZEND_MM_PAGE_SIZE * pages_count);
1009 #endif
1010 return NULL;
1011 }
1012 }
1013 #if ZEND_MM_STAT
1014 do {
1015 size_t size = heap->real_size + ZEND_MM_CHUNK_SIZE;
1016 size_t peak = MAX(heap->real_peak, size);
1017 heap->real_size = size;
1018 heap->real_peak = peak;
1019 } while (0);
1020 #elif ZEND_MM_LIMIT
1021 heap->real_size += ZEND_MM_CHUNK_SIZE;
1022
1023 #endif
1024 }
1025 heap->chunks_count++;
1026 if (heap->chunks_count > heap->peak_chunks_count) {
1027 heap->peak_chunks_count = heap->chunks_count;
1028 }
1029 zend_mm_chunk_init(heap, chunk);
1030 page_num = ZEND_MM_FIRST_PAGE;
1031 len = ZEND_MM_PAGES - ZEND_MM_FIRST_PAGE;
1032 goto found;
1033 } else {
1034 chunk = chunk->next;
1035 steps++;
1036 }
1037 }
1038
1039 found:
1040 if (steps > 2 && pages_count < 8) {
1041 /* move chunk into the head of the linked-list */
1042 chunk->prev->next = chunk->next;
1043 chunk->next->prev = chunk->prev;
1044 chunk->next = heap->main_chunk->next;
1045 chunk->prev = heap->main_chunk;
1046 chunk->prev->next = chunk;
1047 chunk->next->prev = chunk;
1048 }
1049 /* mark run as allocated */
1050 chunk->free_pages -= pages_count;
1051 zend_mm_bitset_set_range(chunk->free_map, page_num, pages_count);
1052 chunk->map[page_num] = ZEND_MM_LRUN(pages_count);
1053 if (page_num == chunk->free_tail) {
1054 chunk->free_tail = page_num + pages_count;
1055 }
1056 return ZEND_MM_PAGE_ADDR(chunk, page_num);
1057 }
1058
1059 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)
1060 {
1061 int pages_count = (int)ZEND_MM_SIZE_TO_NUM(size, ZEND_MM_PAGE_SIZE);
1062 #if ZEND_DEBUG
1063 void *ptr = zend_mm_alloc_pages(heap, pages_count, size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
1064 #else
1065 void *ptr = zend_mm_alloc_pages(heap, pages_count ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
1066 #endif
1067 #if ZEND_MM_STAT
1068 do {
1069 size_t size = heap->size + pages_count * ZEND_MM_PAGE_SIZE;
1070 size_t peak = MAX(heap->peak, size);
1071 heap->size = size;
1072 heap->peak = peak;
1073 } while (0);
1074 #endif
1075 return ptr;
1076 }
1077
1078 static zend_always_inline void zend_mm_delete_chunk(zend_mm_heap *heap, zend_mm_chunk *chunk)
1079 {
1080 chunk->next->prev = chunk->prev;
1081 chunk->prev->next = chunk->next;
1082 heap->chunks_count--;
1083 if (heap->chunks_count + heap->cached_chunks_count < heap->avg_chunks_count + 0.1
1084 || (heap->chunks_count == heap->last_chunks_delete_boundary
1085 && heap->last_chunks_delete_count >= 4)) {
1086 /* delay deletion */
1087 heap->cached_chunks_count++;
1088 chunk->next = heap->cached_chunks;
1089 heap->cached_chunks = chunk;
1090 } else {
1091 #if ZEND_MM_STAT || ZEND_MM_LIMIT
1092 heap->real_size -= ZEND_MM_CHUNK_SIZE;
1093 #endif
1094 if (!heap->cached_chunks) {
1095 if (heap->chunks_count != heap->last_chunks_delete_boundary) {
1096 heap->last_chunks_delete_boundary = heap->chunks_count;
1097 heap->last_chunks_delete_count = 0;
1098 } else {
1099 heap->last_chunks_delete_count++;
1100 }
1101 }
1102 if (!heap->cached_chunks || chunk->num > heap->cached_chunks->num) {
1103 zend_mm_chunk_free(heap, chunk, ZEND_MM_CHUNK_SIZE);
1104 } else {
1105 //TODO: select the best chunk to delete???
1106 chunk->next = heap->cached_chunks->next;
1107 zend_mm_chunk_free(heap, heap->cached_chunks, ZEND_MM_CHUNK_SIZE);
1108 heap->cached_chunks = chunk;
1109 }
1110 }
1111 }
1112
1113 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)
1114 {
1115 chunk->free_pages += pages_count;
1116 zend_mm_bitset_reset_range(chunk->free_map, page_num, pages_count);
1117 chunk->map[page_num] = 0;
1118 if (chunk->free_tail == page_num + pages_count) {
1119 /* this setting may be not accurate */
1120 chunk->free_tail = page_num;
1121 }
1122 if (free_chunk && chunk->free_pages == ZEND_MM_PAGES - ZEND_MM_FIRST_PAGE) {
1123 zend_mm_delete_chunk(heap, chunk);
1124 }
1125 }
1126
1127 static void zend_mm_free_pages(zend_mm_heap *heap, zend_mm_chunk *chunk, int page_num, int pages_count)
1128 {
1129 zend_mm_free_pages_ex(heap, chunk, page_num, pages_count, 1);
1130 }
1131
1132 static zend_always_inline void zend_mm_free_large(zend_mm_heap *heap, zend_mm_chunk *chunk, int page_num, int pages_count)
1133 {
1134 #if ZEND_MM_STAT
1135 heap->size -= pages_count * ZEND_MM_PAGE_SIZE;
1136 #endif
1137 zend_mm_free_pages(heap, chunk, page_num, pages_count);
1138 }
1139
1140 /**************/
1141 /* Small Runs */
1142 /**************/
1143
1144 /* higher set bit number (0->N/A, 1->1, 2->2, 4->3, 8->4, 127->7, 128->8 etc) */
1145 static zend_always_inline int zend_mm_small_size_to_bit(int size)
1146 {
1147 #if (defined(__GNUC__) || __has_builtin(__builtin_clz)) && defined(PHP_HAVE_BUILTIN_CLZ)
1148 return (__builtin_clz(size) ^ 0x1f) + 1;
1149 #elif defined(_WIN32)
1150 unsigned long index;
1151
1152 if (!BitScanReverse(&index, (unsigned long)size)) {
1153 /* undefined behavior */
1154 return 64;
1155 }
1156
1157 return (((31 - (int)index) ^ 0x1f) + 1);
1158 #else
1159 int n = 16;
1160 if (size <= 0x00ff) {n -= 8; size = size << 8;}
1161 if (size <= 0x0fff) {n -= 4; size = size << 4;}
1162 if (size <= 0x3fff) {n -= 2; size = size << 2;}
1163 if (size <= 0x7fff) {n -= 1;}
1164 return n;
1165 #endif
1166 }
1167
1168 #ifndef MAX
1169 # define MAX(a, b) (((a) > (b)) ? (a) : (b))
1170 #endif
1171
1172 #ifndef MIN
1173 # define MIN(a, b) (((a) < (b)) ? (a) : (b))
1174 #endif
1175
1176 static zend_always_inline int zend_mm_small_size_to_bin(size_t size)
1177 {
1178 #if 0
1179 int n;
1180 /*0, 1, 2, 3, 4, 5, 6, 7, 8, 9 10, 11, 12*/
1181 static const int f1[] = { 3, 3, 3, 3, 3, 3, 3, 4, 5, 6, 7, 8, 9};
1182 static const int f2[] = { 0, 0, 0, 0, 0, 0, 0, 4, 8, 12, 16, 20, 24};
1183
1184 if (UNEXPECTED(size <= 2)) return 0;
1185 n = zend_mm_small_size_to_bit(size - 1);
1186 return ((size-1) >> f1[n]) + f2[n];
1187 #else
1188 unsigned int t1, t2;
1189
1190 if (size <= 64) {
1191 /* we need to support size == 0 ... */
1192 return (size - !!size) >> 3;
1193 } else {
1194 t1 = size - 1;
1195 t2 = zend_mm_small_size_to_bit(t1) - 3;
1196 t1 = t1 >> t2;
1197 t2 = t2 - 3;
1198 t2 = t2 << 2;
1199 return (int)(t1 + t2);
1200 }
1201 #endif
1202 }
1203
1204 #define ZEND_MM_SMALL_SIZE_TO_BIN(size) zend_mm_small_size_to_bin(size)
1205
1206 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)
1207 {
1208 zend_mm_chunk *chunk;
1209 int page_num;
1210 zend_mm_bin *bin;
1211 zend_mm_free_slot *p, *end;
1212
1213 #if ZEND_DEBUG
1214 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);
1215 #else
1216 bin = (zend_mm_bin*)zend_mm_alloc_pages(heap, bin_pages[bin_num] ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
1217 #endif
1218 if (UNEXPECTED(bin == NULL)) {
1219 /* insufficient memory */
1220 return NULL;
1221 }
1222
1223 chunk = (zend_mm_chunk*)ZEND_MM_ALIGNED_BASE(bin, ZEND_MM_CHUNK_SIZE);
1224 page_num = ZEND_MM_ALIGNED_OFFSET(bin, ZEND_MM_CHUNK_SIZE) / ZEND_MM_PAGE_SIZE;
1225 chunk->map[page_num] = ZEND_MM_SRUN(bin_num);
1226 if (bin_pages[bin_num] > 1) {
1227 uint32_t i = 1;
1228
1229 do {
1230 chunk->map[page_num+i] = ZEND_MM_NRUN(bin_num, i);
1231 i++;
1232 } while (i < bin_pages[bin_num]);
1233 }
1234
1235 /* create a linked list of elements from 1 to last */
1236 end = (zend_mm_free_slot*)((char*)bin + (bin_data_size[bin_num] * (bin_elements[bin_num] - 1)));
1237 heap->free_slot[bin_num] = p = (zend_mm_free_slot*)((char*)bin + bin_data_size[bin_num]);
1238 do {
1239 p->next_free_slot = (zend_mm_free_slot*)((char*)p + bin_data_size[bin_num]);
1240 #if ZEND_DEBUG
1241 do {
1242 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)));
1243 dbg->size = 0;
1244 } while (0);
1245 #endif
1246 p = (zend_mm_free_slot*)((char*)p + bin_data_size[bin_num]);
1247 } while (p != end);
1248
1249 /* terminate list using NULL */
1250 p->next_free_slot = NULL;
1251 #if ZEND_DEBUG
1252 do {
1253 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)));
1254 dbg->size = 0;
1255 } while (0);
1256 #endif
1257
1258 /* return first element */
1259 return (char*)bin;
1260 }
1261
1262 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)
1263 {
1264 #if ZEND_MM_STAT
1265 do {
1266 size_t size = heap->size + bin_data_size[bin_num];
1267 size_t peak = MAX(heap->peak, size);
1268 heap->size = size;
1269 heap->peak = peak;
1270 } while (0);
1271 #endif
1272
1273 if (EXPECTED(heap->free_slot[bin_num] != NULL)) {
1274 zend_mm_free_slot *p = heap->free_slot[bin_num];
1275 heap->free_slot[bin_num] = p->next_free_slot;
1276 return (void*)p;
1277 } else {
1278 return zend_mm_alloc_small_slow(heap, bin_num ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
1279 }
1280 }
1281
1282 static zend_always_inline void zend_mm_free_small(zend_mm_heap *heap, void *ptr, int bin_num)
1283 {
1284 zend_mm_free_slot *p;
1285
1286 #if ZEND_MM_STAT
1287 heap->size -= bin_data_size[bin_num];
1288 #endif
1289
1290 #if ZEND_DEBUG
1291 do {
1292 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)));
1293 dbg->size = 0;
1294 } while (0);
1295 #endif
1296
1297 p = (zend_mm_free_slot*)ptr;
1298 p->next_free_slot = heap->free_slot[bin_num];
1299 heap->free_slot[bin_num] = p;
1300 }
1301
1302 /********/
1303 /* Heap */
1304 /********/
1305
1306 #if ZEND_DEBUG
1307 static zend_always_inline zend_mm_debug_info *zend_mm_get_debug_info(zend_mm_heap *heap, void *ptr)
1308 {
1309 size_t page_offset = ZEND_MM_ALIGNED_OFFSET(ptr, ZEND_MM_CHUNK_SIZE);
1310 zend_mm_chunk *chunk;
1311 int page_num;
1312 zend_mm_page_info info;
1313
1314 ZEND_MM_CHECK(page_offset != 0, "zend_mm_heap corrupted");
1315 chunk = (zend_mm_chunk*)ZEND_MM_ALIGNED_BASE(ptr, ZEND_MM_CHUNK_SIZE);
1316 page_num = (int)(page_offset / ZEND_MM_PAGE_SIZE);
1317 info = chunk->map[page_num];
1318 ZEND_MM_CHECK(chunk->heap == heap, "zend_mm_heap corrupted");
1319 if (EXPECTED(info & ZEND_MM_IS_SRUN)) {
1320 int bin_num = ZEND_MM_SRUN_BIN_NUM(info);
1321 return (zend_mm_debug_info*)((char*)ptr + bin_data_size[bin_num] - ZEND_MM_ALIGNED_SIZE(sizeof(zend_mm_debug_info)));
1322 } else /* if (info & ZEND_MM_IS_LRUN) */ {
1323 int pages_count = ZEND_MM_LRUN_PAGES(info);
1324
1325 return (zend_mm_debug_info*)((char*)ptr + ZEND_MM_PAGE_SIZE * pages_count - ZEND_MM_ALIGNED_SIZE(sizeof(zend_mm_debug_info)));
1326 }
1327 }
1328 #endif
1329
1330 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)
1331 {
1332 void *ptr;
1333 #if ZEND_DEBUG
1334 size_t real_size = size;
1335 zend_mm_debug_info *dbg;
1336
1337 /* special handling for zero-size allocation */
1338 size = MAX(size, 1);
1339 size = ZEND_MM_ALIGNED_SIZE(size) + ZEND_MM_ALIGNED_SIZE(sizeof(zend_mm_debug_info));
1340 if (UNEXPECTED(size < real_size)) {
1341 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)));
1342 return NULL;
1343 }
1344 #endif
1345 if (size <= ZEND_MM_MAX_SMALL_SIZE) {
1346 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);
1347 #if ZEND_DEBUG
1348 dbg = zend_mm_get_debug_info(heap, ptr);
1349 dbg->size = real_size;
1350 dbg->filename = __zend_filename;
1351 dbg->orig_filename = __zend_orig_filename;
1352 dbg->lineno = __zend_lineno;
1353 dbg->orig_lineno = __zend_orig_lineno;
1354 #endif
1355 return ptr;
1356 } else if (size <= ZEND_MM_MAX_LARGE_SIZE) {
1357 ptr = zend_mm_alloc_large(heap, size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
1358 #if ZEND_DEBUG
1359 dbg = zend_mm_get_debug_info(heap, ptr);
1360 dbg->size = real_size;
1361 dbg->filename = __zend_filename;
1362 dbg->orig_filename = __zend_orig_filename;
1363 dbg->lineno = __zend_lineno;
1364 dbg->orig_lineno = __zend_orig_lineno;
1365 #endif
1366 return ptr;
1367 } else {
1368 #if ZEND_DEBUG
1369 size = real_size;
1370 #endif
1371 return zend_mm_alloc_huge(heap, size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
1372 }
1373 }
1374
1375 static zend_always_inline void zend_mm_free_heap(zend_mm_heap *heap, void *ptr ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
1376 {
1377 size_t page_offset = ZEND_MM_ALIGNED_OFFSET(ptr, ZEND_MM_CHUNK_SIZE);
1378
1379 if (UNEXPECTED(page_offset == 0)) {
1380 if (ptr != NULL) {
1381 zend_mm_free_huge(heap, ptr ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
1382 }
1383 } else {
1384 zend_mm_chunk *chunk = (zend_mm_chunk*)ZEND_MM_ALIGNED_BASE(ptr, ZEND_MM_CHUNK_SIZE);
1385 int page_num = (int)(page_offset / ZEND_MM_PAGE_SIZE);
1386 zend_mm_page_info info = chunk->map[page_num];
1387
1388 ZEND_MM_CHECK(chunk->heap == heap, "zend_mm_heap corrupted");
1389 if (EXPECTED(info & ZEND_MM_IS_SRUN)) {
1390 zend_mm_free_small(heap, ptr, ZEND_MM_SRUN_BIN_NUM(info));
1391 } else /* if (info & ZEND_MM_IS_LRUN) */ {
1392 int pages_count = ZEND_MM_LRUN_PAGES(info);
1393
1394 ZEND_MM_CHECK(ZEND_MM_ALIGNED_OFFSET(page_offset, ZEND_MM_PAGE_SIZE) == 0, "zend_mm_heap corrupted");
1395 zend_mm_free_large(heap, chunk, page_num, pages_count);
1396 }
1397 }
1398 }
1399
1400 static size_t zend_mm_size(zend_mm_heap *heap, void *ptr ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
1401 {
1402 size_t page_offset = ZEND_MM_ALIGNED_OFFSET(ptr, ZEND_MM_CHUNK_SIZE);
1403
1404 if (UNEXPECTED(page_offset == 0)) {
1405 return zend_mm_get_huge_block_size(heap, ptr ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
1406 } else {
1407 zend_mm_chunk *chunk;
1408 #if 0 && ZEND_DEBUG
1409 zend_mm_debug_info *dbg = zend_mm_get_debug_info(heap, ptr);
1410 return dbg->size;
1411 #else
1412 int page_num;
1413 zend_mm_page_info info;
1414
1415 chunk = (zend_mm_chunk*)ZEND_MM_ALIGNED_BASE(ptr, ZEND_MM_CHUNK_SIZE);
1416 page_num = (int)(page_offset / ZEND_MM_PAGE_SIZE);
1417 info = chunk->map[page_num];
1418 ZEND_MM_CHECK(chunk->heap == heap, "zend_mm_heap corrupted");
1419 if (EXPECTED(info & ZEND_MM_IS_SRUN)) {
1420 return bin_data_size[ZEND_MM_SRUN_BIN_NUM(info)];
1421 } else /* if (info & ZEND_MM_IS_LARGE_RUN) */ {
1422 return ZEND_MM_LRUN_PAGES(info) * ZEND_MM_PAGE_SIZE;
1423 }
1424 #endif
1425 }
1426 }
1427
1428 static void *zend_mm_realloc_heap(zend_mm_heap *heap, void *ptr, size_t size, size_t copy_size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
1429 {
1430 size_t page_offset;
1431 size_t old_size;
1432 size_t new_size;
1433 void *ret;
1434 #if ZEND_DEBUG
1435 size_t real_size;
1436 zend_mm_debug_info *dbg;
1437 #endif
1438
1439 page_offset = ZEND_MM_ALIGNED_OFFSET(ptr, ZEND_MM_CHUNK_SIZE);
1440 if (UNEXPECTED(page_offset == 0)) {
1441 if (UNEXPECTED(ptr == NULL)) {
1442 return zend_mm_alloc_heap(heap, size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
1443 }
1444 old_size = zend_mm_get_huge_block_size(heap, ptr ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
1445 #if ZEND_DEBUG
1446 real_size = size;
1447 size = ZEND_MM_ALIGNED_SIZE(size) + ZEND_MM_ALIGNED_SIZE(sizeof(zend_mm_debug_info));
1448 #endif
1449 if (size > ZEND_MM_MAX_LARGE_SIZE) {
1450 #if ZEND_DEBUG
1451 size = real_size;
1452 #endif
1453 #ifdef ZEND_WIN32
1454 /* On Windows we don't have ability to extend huge blocks in-place.
1455 * We allocate them with 2MB size granularity, to avoid many
1456 * reallocations when they are extended by small pieces
1457 */
1458 new_size = ZEND_MM_ALIGNED_SIZE_EX(size, MAX(REAL_PAGE_SIZE, ZEND_MM_CHUNK_SIZE));
1459 #else
1460 new_size = ZEND_MM_ALIGNED_SIZE_EX(size, REAL_PAGE_SIZE);
1461 #endif
1462 if (new_size == old_size) {
1463 #if ZEND_DEBUG
1464 zend_mm_change_huge_block_size(heap, ptr, new_size, real_size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
1465 #else
1466 zend_mm_change_huge_block_size(heap, ptr, new_size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
1467 #endif
1468 return ptr;
1469 } else if (new_size < old_size) {
1470 /* unmup tail */
1471 if (zend_mm_chunk_truncate(heap, ptr, old_size, new_size)) {
1472 #if ZEND_MM_STAT || ZEND_MM_LIMIT
1473 heap->real_size -= old_size - new_size;
1474 #endif
1475 #if ZEND_MM_STAT
1476 heap->size -= old_size - new_size;
1477 #endif
1478 #if ZEND_DEBUG
1479 zend_mm_change_huge_block_size(heap, ptr, new_size, real_size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
1480 #else
1481 zend_mm_change_huge_block_size(heap, ptr, new_size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
1482 #endif
1483 return ptr;
1484 }
1485 } else /* if (new_size > old_size) */ {
1486 #if ZEND_MM_LIMIT
1487 if (UNEXPECTED(new_size - old_size > heap->limit - heap->real_size)) {
1488 if (zend_mm_gc(heap) && new_size - old_size <= heap->limit - heap->real_size) {
1489 /* pass */
1490 } else if (heap->overflow == 0) {
1491 #if ZEND_DEBUG
1492 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);
1493 #else
1494 zend_mm_safe_error(heap, "Allowed memory size of %zu bytes exhausted (tried to allocate %zu bytes)", heap->limit, size);
1495 #endif
1496 return NULL;
1497 }
1498 }
1499 #endif
1500 /* try to map tail right after this block */
1501 if (zend_mm_chunk_extend(heap, ptr, old_size, new_size)) {
1502 #if ZEND_MM_STAT || ZEND_MM_LIMIT
1503 heap->real_size += new_size - old_size;
1504 #endif
1505 #if ZEND_MM_STAT
1506 heap->real_peak = MAX(heap->real_peak, heap->real_size);
1507 heap->size += new_size - old_size;
1508 heap->peak = MAX(heap->peak, heap->size);
1509 #endif
1510 #if ZEND_DEBUG
1511 zend_mm_change_huge_block_size(heap, ptr, new_size, real_size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
1512 #else
1513 zend_mm_change_huge_block_size(heap, ptr, new_size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
1514 #endif
1515 return ptr;
1516 }
1517 }
1518 }
1519 } else {
1520 zend_mm_chunk *chunk = (zend_mm_chunk*)ZEND_MM_ALIGNED_BASE(ptr, ZEND_MM_CHUNK_SIZE);
1521 int page_num = (int)(page_offset / ZEND_MM_PAGE_SIZE);
1522 zend_mm_page_info info = chunk->map[page_num];
1523 #if ZEND_DEBUG
1524 size_t real_size = size;
1525
1526 size = ZEND_MM_ALIGNED_SIZE(size) + ZEND_MM_ALIGNED_SIZE(sizeof(zend_mm_debug_info));
1527 #endif
1528
1529 ZEND_MM_CHECK(chunk->heap == heap, "zend_mm_heap corrupted");
1530 if (info & ZEND_MM_IS_SRUN) {
1531 int old_bin_num = ZEND_MM_SRUN_BIN_NUM(info);
1532 old_size = bin_data_size[old_bin_num];
1533 if (size <= ZEND_MM_MAX_SMALL_SIZE) {
1534 int bin_num = ZEND_MM_SMALL_SIZE_TO_BIN(size);
1535 if (old_bin_num == bin_num) {
1536 #if ZEND_DEBUG
1537 dbg = zend_mm_get_debug_info(heap, ptr);
1538 dbg->size = real_size;
1539 dbg->filename = __zend_filename;
1540 dbg->orig_filename = __zend_orig_filename;
1541 dbg->lineno = __zend_lineno;
1542 dbg->orig_lineno = __zend_orig_lineno;
1543 #endif
1544 return ptr;
1545 }
1546 }
1547 } else /* if (info & ZEND_MM_IS_LARGE_RUN) */ {
1548 ZEND_MM_CHECK(ZEND_MM_ALIGNED_OFFSET(page_offset, ZEND_MM_PAGE_SIZE) == 0, "zend_mm_heap corrupted");
1549 old_size = ZEND_MM_LRUN_PAGES(info) * ZEND_MM_PAGE_SIZE;
1550 if (size > ZEND_MM_MAX_SMALL_SIZE && size <= ZEND_MM_MAX_LARGE_SIZE) {
1551 new_size = ZEND_MM_ALIGNED_SIZE_EX(size, ZEND_MM_PAGE_SIZE);
1552 if (new_size == old_size) {
1553 #if ZEND_DEBUG
1554 dbg = zend_mm_get_debug_info(heap, ptr);
1555 dbg->size = real_size;
1556 dbg->filename = __zend_filename;
1557 dbg->orig_filename = __zend_orig_filename;
1558 dbg->lineno = __zend_lineno;
1559 dbg->orig_lineno = __zend_orig_lineno;
1560 #endif
1561 return ptr;
1562 } else if (new_size < old_size) {
1563 /* free tail pages */
1564 int new_pages_count = (int)(new_size / ZEND_MM_PAGE_SIZE);
1565 int rest_pages_count = (int)((old_size - new_size) / ZEND_MM_PAGE_SIZE);
1566
1567 #if ZEND_MM_STAT
1568 heap->size -= rest_pages_count * ZEND_MM_PAGE_SIZE;
1569 #endif
1570 chunk->map[page_num] = ZEND_MM_LRUN(new_pages_count);
1571 chunk->free_pages += rest_pages_count;
1572 zend_mm_bitset_reset_range(chunk->free_map, page_num + new_pages_count, rest_pages_count);
1573 #if ZEND_DEBUG
1574 dbg = zend_mm_get_debug_info(heap, ptr);
1575 dbg->size = real_size;
1576 dbg->filename = __zend_filename;
1577 dbg->orig_filename = __zend_orig_filename;
1578 dbg->lineno = __zend_lineno;
1579 dbg->orig_lineno = __zend_orig_lineno;
1580 #endif
1581 return ptr;
1582 } else /* if (new_size > old_size) */ {
1583 int new_pages_count = (int)(new_size / ZEND_MM_PAGE_SIZE);
1584 int old_pages_count = (int)(old_size / ZEND_MM_PAGE_SIZE);
1585
1586 /* try to allocate tail pages after this block */
1587 if (page_num + new_pages_count <= ZEND_MM_PAGES &&
1588 zend_mm_bitset_is_free_range(chunk->free_map, page_num + old_pages_count, new_pages_count - old_pages_count)) {
1589 #if ZEND_MM_STAT
1590 do {
1591 size_t size = heap->size + (new_size - old_size);
1592 size_t peak = MAX(heap->peak, size);
1593 heap->size = size;
1594 heap->peak = peak;
1595 } while (0);
1596 #endif
1597 chunk->free_pages -= new_pages_count - old_pages_count;
1598 zend_mm_bitset_set_range(chunk->free_map, page_num + old_pages_count, new_pages_count - old_pages_count);
1599 chunk->map[page_num] = ZEND_MM_LRUN(new_pages_count);
1600 #if ZEND_DEBUG
1601 dbg = zend_mm_get_debug_info(heap, ptr);
1602 dbg->size = real_size;
1603 dbg->filename = __zend_filename;
1604 dbg->orig_filename = __zend_orig_filename;
1605 dbg->lineno = __zend_lineno;
1606 dbg->orig_lineno = __zend_orig_lineno;
1607 #endif
1608 return ptr;
1609 }
1610 }
1611 }
1612 }
1613 #if ZEND_DEBUG
1614 size = real_size;
1615 #endif
1616 }
1617
1618 /* Naive reallocation */
1619 #if ZEND_MM_STAT
1620 do {
1621 size_t orig_peak = heap->peak;
1622 size_t orig_real_peak = heap->real_peak;
1623 #endif
1624 ret = zend_mm_alloc_heap(heap, size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
1625 memcpy(ret, ptr, MIN(old_size, copy_size));
1626 zend_mm_free_heap(heap, ptr ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
1627 #if ZEND_MM_STAT
1628 heap->peak = MAX(orig_peak, heap->size);
1629 heap->real_peak = MAX(orig_real_peak, heap->real_size);
1630 } while (0);
1631 #endif
1632 return ret;
1633 }
1634
1635 /*********************/
1636 /* Huge Runs (again) */
1637 /*********************/
1638
1639 #if ZEND_DEBUG
1640 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)
1641 #else
1642 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)
1643 #endif
1644 {
1645 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);
1646 list->ptr = ptr;
1647 list->size = size;
1648 list->next = heap->huge_list;
1649 #if ZEND_DEBUG
1650 list->dbg.size = dbg_size;
1651 list->dbg.filename = __zend_filename;
1652 list->dbg.orig_filename = __zend_orig_filename;
1653 list->dbg.lineno = __zend_lineno;
1654 list->dbg.orig_lineno = __zend_orig_lineno;
1655 #endif
1656 heap->huge_list = list;
1657 }
1658
1659 static size_t zend_mm_del_huge_block(zend_mm_heap *heap, void *ptr ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
1660 {
1661 zend_mm_huge_list *prev = NULL;
1662 zend_mm_huge_list *list = heap->huge_list;
1663 while (list != NULL) {
1664 if (list->ptr == ptr) {
1665 size_t size;
1666
1667 if (prev) {
1668 prev->next = list->next;
1669 } else {
1670 heap->huge_list = list->next;
1671 }
1672 size = list->size;
1673 zend_mm_free_heap(heap, list ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
1674 return size;
1675 }
1676 prev = list;
1677 list = list->next;
1678 }
1679 ZEND_MM_CHECK(0, "zend_mm_heap corrupted");
1680 return 0;
1681 }
1682
1683 static size_t zend_mm_get_huge_block_size(zend_mm_heap *heap, void *ptr ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
1684 {
1685 zend_mm_huge_list *list = heap->huge_list;
1686 while (list != NULL) {
1687 if (list->ptr == ptr) {
1688 return list->size;
1689 }
1690 list = list->next;
1691 }
1692 ZEND_MM_CHECK(0, "zend_mm_heap corrupted");
1693 return 0;
1694 }
1695
1696 #if ZEND_DEBUG
1697 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)
1698 #else
1699 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)
1700 #endif
1701 {
1702 zend_mm_huge_list *list = heap->huge_list;
1703 while (list != NULL) {
1704 if (list->ptr == ptr) {
1705 list->size = size;
1706 #if ZEND_DEBUG
1707 list->dbg.size = dbg_size;
1708 list->dbg.filename = __zend_filename;
1709 list->dbg.orig_filename = __zend_orig_filename;
1710 list->dbg.lineno = __zend_lineno;
1711 list->dbg.orig_lineno = __zend_orig_lineno;
1712 #endif
1713 return;
1714 }
1715 list = list->next;
1716 }
1717 }
1718
1719 static void *zend_mm_alloc_huge(zend_mm_heap *heap, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
1720 {
1721 #ifdef ZEND_WIN32
1722 /* On Windows we don't have ability to extend huge blocks in-place.
1723 * We allocate them with 2MB size granularity, to avoid many
1724 * reallocations when they are extended by small pieces
1725 */
1726 size_t alignment = MAX(REAL_PAGE_SIZE, ZEND_MM_CHUNK_SIZE);
1727 #else
1728 size_t alignment = REAL_PAGE_SIZE;
1729 #endif
1730 size_t new_size = ZEND_MM_ALIGNED_SIZE_EX(size, alignment);
1731 void *ptr;
1732
1733 if (UNEXPECTED(new_size < size)) {
1734 zend_error_noreturn(E_ERROR, "Possible integer overflow in memory allocation (%zu + %zu)", size, alignment);
1735 }
1736
1737 #if ZEND_MM_LIMIT
1738 if (UNEXPECTED(new_size > heap->limit - heap->real_size)) {
1739 if (zend_mm_gc(heap) && new_size <= heap->limit - heap->real_size) {
1740 /* pass */
1741 } else if (heap->overflow == 0) {
1742 #if ZEND_DEBUG
1743 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);
1744 #else
1745 zend_mm_safe_error(heap, "Allowed memory size of %zu bytes exhausted (tried to allocate %zu bytes)", heap->limit, size);
1746 #endif
1747 return NULL;
1748 }
1749 }
1750 #endif
1751 ptr = zend_mm_chunk_alloc(heap, new_size, ZEND_MM_CHUNK_SIZE);
1752 if (UNEXPECTED(ptr == NULL)) {
1753 /* insufficient memory */
1754 if (zend_mm_gc(heap) &&
1755 (ptr = zend_mm_chunk_alloc(heap, new_size, ZEND_MM_CHUNK_SIZE)) != NULL) {
1756 /* pass */
1757 } else {
1758 #if !ZEND_MM_LIMIT
1759 zend_mm_safe_error(heap, "Out of memory");
1760 #elif ZEND_DEBUG
1761 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);
1762 #else
1763 zend_mm_safe_error(heap, "Out of memory (allocated %zu) (tried to allocate %zu bytes)", heap->real_size, size);
1764 #endif
1765 return NULL;
1766 }
1767 }
1768 #if ZEND_DEBUG
1769 zend_mm_add_huge_block(heap, ptr, new_size, size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
1770 #else
1771 zend_mm_add_huge_block(heap, ptr, new_size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
1772 #endif
1773 #if ZEND_MM_STAT
1774 do {
1775 size_t size = heap->real_size + new_size;
1776 size_t peak = MAX(heap->real_peak, size);
1777 heap->real_size = size;
1778 heap->real_peak = peak;
1779 } while (0);
1780 do {
1781 size_t size = heap->size + new_size;
1782 size_t peak = MAX(heap->peak, size);
1783 heap->size = size;
1784 heap->peak = peak;
1785 } while (0);
1786 #elif ZEND_MM_LIMIT
1787 heap->real_size += new_size;
1788 #endif
1789 return ptr;
1790 }
1791
1792 static void zend_mm_free_huge(zend_mm_heap *heap, void *ptr ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
1793 {
1794 size_t size;
1795
1796 ZEND_MM_CHECK(ZEND_MM_ALIGNED_OFFSET(ptr, ZEND_MM_CHUNK_SIZE) == 0, "zend_mm_heap corrupted");
1797 size = zend_mm_del_huge_block(heap, ptr ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
1798 zend_mm_chunk_free(heap, ptr, size);
1799 #if ZEND_MM_STAT || ZEND_MM_LIMIT
1800 heap->real_size -= size;
1801 #endif
1802 #if ZEND_MM_STAT
1803 heap->size -= size;
1804 #endif
1805 }
1806
1807 /******************/
1808 /* Initialization */
1809 /******************/
1810
1811 static zend_mm_heap *zend_mm_init(void)
1812 {
1813 zend_mm_chunk *chunk = (zend_mm_chunk*)zend_mm_chunk_alloc_int(ZEND_MM_CHUNK_SIZE, ZEND_MM_CHUNK_SIZE);
1814 zend_mm_heap *heap;
1815
1816 if (UNEXPECTED(chunk == NULL)) {
1817 #if ZEND_MM_ERROR
1818 #ifdef _WIN32
1819 stderr_last_error("Can't initialize heap");
1820 #else
1821 fprintf(stderr, "\nCan't initialize heap: [%d] %s\n", errno, strerror(errno));
1822 #endif
1823 #endif
1824 return NULL;
1825 }
1826 heap = &chunk->heap_slot;
1827 chunk->heap = heap;
1828 chunk->next = chunk;
1829 chunk->prev = chunk;
1830 chunk->free_pages = ZEND_MM_PAGES - ZEND_MM_FIRST_PAGE;
1831 chunk->free_tail = ZEND_MM_FIRST_PAGE;
1832 chunk->num = 0;
1833 chunk->free_map[0] = (Z_L(1) << ZEND_MM_FIRST_PAGE) - 1;
1834 chunk->map[0] = ZEND_MM_LRUN(ZEND_MM_FIRST_PAGE);
1835 heap->main_chunk = chunk;
1836 heap->cached_chunks = NULL;
1837 heap->chunks_count = 1;
1838 heap->peak_chunks_count = 1;
1839 heap->cached_chunks_count = 0;
1840 heap->avg_chunks_count = 1.0;
1841 heap->last_chunks_delete_boundary = 0;
1842 heap->last_chunks_delete_count = 0;
1843 #if ZEND_MM_STAT || ZEND_MM_LIMIT
1844 heap->real_size = ZEND_MM_CHUNK_SIZE;
1845 #endif
1846 #if ZEND_MM_STAT
1847 heap->real_peak = ZEND_MM_CHUNK_SIZE;
1848 heap->size = 0;
1849 heap->peak = 0;
1850 #endif
1851 #if ZEND_MM_LIMIT
1852 heap->limit = ((size_t)Z_L(-1) >> (size_t)Z_L(1));
1853 heap->overflow = 0;
1854 #endif
1855 #if ZEND_MM_CUSTOM
1856 heap->use_custom_heap = ZEND_MM_CUSTOM_HEAP_NONE;
1857 #endif
1858 #if ZEND_MM_STORAGE
1859 heap->storage = NULL;
1860 #endif
1861 heap->huge_list = NULL;
1862 return heap;
1863 }
1864
1865 ZEND_API size_t zend_mm_gc(zend_mm_heap *heap)
1866 {
1867 zend_mm_free_slot *p, **q;
1868 zend_mm_chunk *chunk;
1869 size_t page_offset;
1870 int page_num;
1871 zend_mm_page_info info;
1872 uint32_t i, free_counter;
1873 int has_free_pages;
1874 size_t collected = 0;
1875
1876 #if ZEND_MM_CUSTOM
1877 if (heap->use_custom_heap) {
1878 return 0;
1879 }
1880 #endif
1881
1882 for (i = 0; i < ZEND_MM_BINS; i++) {
1883 has_free_pages = 0;
1884 p = heap->free_slot[i];
1885 while (p != NULL) {
1886 chunk = (zend_mm_chunk*)ZEND_MM_ALIGNED_BASE(p, ZEND_MM_CHUNK_SIZE);
1887 ZEND_MM_CHECK(chunk->heap == heap, "zend_mm_heap corrupted");
1888 page_offset = ZEND_MM_ALIGNED_OFFSET(p, ZEND_MM_CHUNK_SIZE);
1889 ZEND_ASSERT(page_offset != 0);
1890 page_num = (int)(page_offset / ZEND_MM_PAGE_SIZE);
1891 info = chunk->map[page_num];
1892 ZEND_ASSERT(info & ZEND_MM_IS_SRUN);
1893 if (info & ZEND_MM_IS_LRUN) {
1894 page_num -= ZEND_MM_NRUN_OFFSET(info);
1895 info = chunk->map[page_num];
1896 ZEND_ASSERT(info & ZEND_MM_IS_SRUN);
1897 ZEND_ASSERT(!(info & ZEND_MM_IS_LRUN));
1898 }
1899 ZEND_ASSERT(ZEND_MM_SRUN_BIN_NUM(info) == i);
1900 free_counter = ZEND_MM_SRUN_FREE_COUNTER(info) + 1;
1901 if (free_counter == bin_elements[i]) {
1902 has_free_pages = 1;
1903 }
1904 chunk->map[page_num] = ZEND_MM_SRUN_EX(i, free_counter);
1905 p = p->next_free_slot;
1906 }
1907
1908 if (!has_free_pages) {
1909 continue;
1910 }
1911
1912 q = &heap->free_slot[i];
1913 p = *q;
1914 while (p != NULL) {
1915 chunk = (zend_mm_chunk*)ZEND_MM_ALIGNED_BASE(p, ZEND_MM_CHUNK_SIZE);
1916 ZEND_MM_CHECK(chunk->heap == heap, "zend_mm_heap corrupted");
1917 page_offset = ZEND_MM_ALIGNED_OFFSET(p, ZEND_MM_CHUNK_SIZE);
1918 ZEND_ASSERT(page_offset != 0);
1919 page_num = (int)(page_offset / ZEND_MM_PAGE_SIZE);
1920 info = chunk->map[page_num];
1921 ZEND_ASSERT(info & ZEND_MM_IS_SRUN);
1922 if (info & ZEND_MM_IS_LRUN) {
1923 page_num -= ZEND_MM_NRUN_OFFSET(info);
1924 info = chunk->map[page_num];
1925 ZEND_ASSERT(info & ZEND_MM_IS_SRUN);
1926 ZEND_ASSERT(!(info & ZEND_MM_IS_LRUN));
1927 }
1928 ZEND_ASSERT(ZEND_MM_SRUN_BIN_NUM(info) == i);
1929 if (ZEND_MM_SRUN_FREE_COUNTER(info) == bin_elements[i]) {
1930 /* remove from cache */
1931 p = p->next_free_slot;
1932 *q = p;
1933 } else {
1934 q = &p->next_free_slot;
1935 p = *q;
1936 }
1937 }
1938 }
1939
1940 chunk = heap->main_chunk;
1941 do {
1942 i = ZEND_MM_FIRST_PAGE;
1943 while (i < chunk->free_tail) {
1944 if (zend_mm_bitset_is_set(chunk->free_map, i)) {
1945 info = chunk->map[i];
1946 if (info & ZEND_MM_IS_SRUN) {
1947 int bin_num = ZEND_MM_SRUN_BIN_NUM(info);
1948 int pages_count = bin_pages[bin_num];
1949
1950 if (ZEND_MM_SRUN_FREE_COUNTER(info) == bin_elements[bin_num]) {
1951 /* all elemens are free */
1952 zend_mm_free_pages_ex(heap, chunk, i, pages_count, 0);
1953 collected += pages_count;
1954 } else {
1955 /* reset counter */
1956 chunk->map[i] = ZEND_MM_SRUN(bin_num);
1957 }
1958 i += bin_pages[bin_num];
1959 } else /* if (info & ZEND_MM_IS_LRUN) */ {
1960 i += ZEND_MM_LRUN_PAGES(info);
1961 }
1962 } else {
1963 i++;
1964 }
1965 }
1966 if (chunk->free_pages == ZEND_MM_PAGES - ZEND_MM_FIRST_PAGE) {
1967 zend_mm_chunk *next_chunk = chunk->next;
1968
1969 zend_mm_delete_chunk(heap, chunk);
1970 chunk = next_chunk;
1971 } else {
1972 chunk = chunk->next;
1973 }
1974 } while (chunk != heap->main_chunk);
1975
1976 return collected * ZEND_MM_PAGE_SIZE;
1977 }
1978
1979 #if ZEND_DEBUG
1980 /******************/
1981 /* Leak detection */
1982 /******************/
1983
1984 static zend_long zend_mm_find_leaks_small(zend_mm_chunk *p, uint32_t i, uint32_t j, zend_leak_info *leak)
1985 {
1986 int empty = 1;
1987 zend_long count = 0;
1988 int bin_num = ZEND_MM_SRUN_BIN_NUM(p->map[i]);
1989 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)));
1990
1991 while (j < bin_elements[bin_num]) {
1992 if (dbg->size != 0) {
1993 if (dbg->filename == leak->filename && dbg->lineno == leak->lineno) {
1994 count++;
1995 dbg->size = 0;
1996 dbg->filename = NULL;
1997 dbg->lineno = 0;
1998 } else {
1999 empty = 0;
2000 }
2001 }
2002 j++;
2003 dbg = (zend_mm_debug_info*)((char*)dbg + bin_data_size[bin_num]);
2004 }
2005 if (empty) {
2006 zend_mm_bitset_reset_range(p->free_map, i, bin_pages[bin_num]);
2007 }
2008 return count;
2009 }
2010
2011 static zend_long zend_mm_find_leaks(zend_mm_heap *heap, zend_mm_chunk *p, uint32_t i, zend_leak_info *leak)
2012 {
2013 zend_long count = 0;
2014
2015 do {
2016 while (i < p->free_tail) {
2017 if (zend_mm_bitset_is_set(p->free_map, i)) {
2018 if (p->map[i] & ZEND_MM_IS_SRUN) {
2019 int bin_num = ZEND_MM_SRUN_BIN_NUM(p->map[i]);
2020 count += zend_mm_find_leaks_small(p, i, 0, leak);
2021 i += bin_pages[bin_num];
2022 } else /* if (p->map[i] & ZEND_MM_IS_LRUN) */ {
2023 int pages_count = ZEND_MM_LRUN_PAGES(p->map[i]);
2024 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)));
2025
2026 if (dbg->filename == leak->filename && dbg->lineno == leak->lineno) {
2027 count++;
2028 }
2029 zend_mm_bitset_reset_range(p->free_map, i, pages_count);
2030 i += pages_count;
2031 }
2032 } else {
2033 i++;
2034 }
2035 }
2036 p = p->next;
2037 } while (p != heap->main_chunk);
2038 return count;
2039 }
2040
2041 static zend_long zend_mm_find_leaks_huge(zend_mm_heap *heap, zend_mm_huge_list *list)
2042 {
2043 zend_long count = 0;
2044 zend_mm_huge_list *prev = list;
2045 zend_mm_huge_list *p = list->next;
2046
2047 while (p) {
2048 if (p->dbg.filename == list->dbg.filename && p->dbg.lineno == list->dbg.lineno) {
2049 prev->next = p->next;
2050 zend_mm_chunk_free(heap, p->ptr, p->size);
2051 zend_mm_free_heap(heap, p, NULL, 0, NULL, 0);
2052 count++;
2053 } else {
2054 prev = p;
2055 }
2056 p = prev->next;
2057 }
2058
2059 return count;
2060 }
2061
2062 static void zend_mm_check_leaks(zend_mm_heap *heap)
2063 {
2064 zend_mm_huge_list *list;
2065 zend_mm_chunk *p;
2066 zend_leak_info leak;
2067 zend_long repeated = 0;
2068 uint32_t total = 0;
2069 uint32_t i, j;
2070
2071 /* find leaked huge blocks and free them */
2072 list = heap->huge_list;
2073 while (list) {
2074 zend_mm_huge_list *q = list;
2075
2076 leak.addr = list->ptr;
2077 leak.size = list->dbg.size;
2078 leak.filename = list->dbg.filename;
2079 leak.orig_filename = list->dbg.orig_filename;
2080 leak.lineno = list->dbg.lineno;
2081 leak.orig_lineno = list->dbg.orig_lineno;
2082
2083 zend_message_dispatcher(ZMSG_LOG_SCRIPT_NAME, NULL);
2084 zend_message_dispatcher(ZMSG_MEMORY_LEAK_DETECTED, &leak);
2085 repeated = zend_mm_find_leaks_huge(heap, list);
2086 total += 1 + repeated;
2087 if (repeated) {
2088 zend_message_dispatcher(ZMSG_MEMORY_LEAK_REPEATED, (void *)(zend_uintptr_t)repeated);
2089 }
2090
2091 heap->huge_list = list = list->next;
2092 zend_mm_chunk_free(heap, q->ptr, q->size);
2093 zend_mm_free_heap(heap, q, NULL, 0, NULL, 0);
2094 }
2095
2096 /* for each chunk */
2097 p = heap->main_chunk;
2098 do {
2099 i = ZEND_MM_FIRST_PAGE;
2100 while (i < p->free_tail) {
2101 if (zend_mm_bitset_is_set(p->free_map, i)) {
2102 if (p->map[i] & ZEND_MM_IS_SRUN) {
2103 int bin_num = ZEND_MM_SRUN_BIN_NUM(p->map[i]);
2104 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)));
2105
2106 j = 0;
2107 while (j < bin_elements[bin_num]) {
2108 if (dbg->size != 0) {
2109 leak.addr = (zend_mm_debug_info*)((char*)p + ZEND_MM_PAGE_SIZE * i + bin_data_size[bin_num] * j);
2110 leak.size = dbg->size;
2111 leak.filename = dbg->filename;
2112 leak.orig_filename = dbg->orig_filename;
2113 leak.lineno = dbg->lineno;
2114 leak.orig_lineno = dbg->orig_lineno;
2115
2116 zend_message_dispatcher(ZMSG_LOG_SCRIPT_NAME, NULL);
2117 zend_message_dispatcher(ZMSG_MEMORY_LEAK_DETECTED, &leak);
2118
2119 dbg->size = 0;
2120 dbg->filename = NULL;
2121 dbg->lineno = 0;
2122
2123 repeated = zend_mm_find_leaks_small(p, i, j + 1, &leak) +
2124 zend_mm_find_leaks(heap, p, i + bin_pages[bin_num], &leak);
2125 total += 1 + repeated;
2126 if (repeated) {
2127 zend_message_dispatcher(ZMSG_MEMORY_LEAK_REPEATED, (void *)(zend_uintptr_t)repeated);
2128 }
2129 }
2130 dbg = (zend_mm_debug_info*)((char*)dbg + bin_data_size[bin_num]);
2131 j++;
2132 }
2133 i += bin_pages[bin_num];
2134 } else /* if (p->map[i] & ZEND_MM_IS_LRUN) */ {
2135 int pages_count = ZEND_MM_LRUN_PAGES(p->map[i]);
2136 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)));
2137
2138 leak.addr = (void*)((char*)p + ZEND_MM_PAGE_SIZE * i);
2139 leak.size = dbg->size;
2140 leak.filename = dbg->filename;
2141 leak.orig_filename = dbg->orig_filename;
2142 leak.lineno = dbg->lineno;
2143 leak.orig_lineno = dbg->orig_lineno;
2144
2145 zend_message_dispatcher(ZMSG_LOG_SCRIPT_NAME, NULL);
2146 zend_message_dispatcher(ZMSG_MEMORY_LEAK_DETECTED, &leak);
2147
2148 zend_mm_bitset_reset_range(p->free_map, i, pages_count);
2149
2150 repeated = zend_mm_find_leaks(heap, p, i + pages_count, &leak);
2151 total += 1 + repeated;
2152 if (repeated) {
2153 zend_message_dispatcher(ZMSG_MEMORY_LEAK_REPEATED, (void *)(zend_uintptr_t)repeated);
2154 }
2155 i += pages_count;
2156 }
2157 } else {
2158 i++;
2159 }
2160 }
2161 p = p->next;
2162 } while (p != heap->main_chunk);
2163 if (total) {
2164 zend_message_dispatcher(ZMSG_MEMORY_LEAKS_GRAND_TOTAL, &total);
2165 }
2166 }
2167 #endif
2168
2169 void zend_mm_shutdown(zend_mm_heap *heap, int full, int silent)
2170 {
2171 zend_mm_chunk *p;
2172 zend_mm_huge_list *list;
2173
2174 #if ZEND_MM_CUSTOM
2175 if (heap->use_custom_heap) {
2176 if (full) {
2177 if (ZEND_DEBUG && heap->use_custom_heap == ZEND_MM_CUSTOM_HEAP_DEBUG) {
2178 heap->custom_heap.debug._free(heap ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC);
2179 } else {
2180 heap->custom_heap.std._free(heap);
2181 }
2182 }
2183 return;
2184 }
2185 #endif
2186
2187 #if ZEND_DEBUG
2188 if (!silent) {
2189 zend_mm_check_leaks(heap);
2190 }
2191 #endif
2192
2193 /* free huge blocks */
2194 list = heap->huge_list;
2195 heap->huge_list = NULL;
2196 while (list) {
2197 zend_mm_huge_list *q = list;
2198 list = list->next;
2199 zend_mm_chunk_free(heap, q->ptr, q->size);
2200 }
2201
2202 /* move all chunks except of the first one into the cache */
2203 p = heap->main_chunk->next;
2204 while (p != heap->main_chunk) {
2205 zend_mm_chunk *q = p->next;
2206 p->next = heap->cached_chunks;
2207 heap->cached_chunks = p;
2208 p = q;
2209 heap->chunks_count--;
2210 heap->cached_chunks_count++;
2211 }
2212
2213 if (full) {
2214 /* free all cached chunks */
2215 while (heap->cached_chunks) {
2216 p = heap->cached_chunks;
2217 heap->cached_chunks = p->next;
2218 zend_mm_chunk_free(heap, p, ZEND_MM_CHUNK_SIZE);
2219 }
2220 /* free the first chunk */
2221 zend_mm_chunk_free(heap, heap->main_chunk, ZEND_MM_CHUNK_SIZE);
2222 } else {
2223 zend_mm_heap old_heap;
2224
2225 /* free some cached chunks to keep average count */
2226 heap->avg_chunks_count = (heap->avg_chunks_count + (double)heap->peak_chunks_count) / 2.0;
2227 while ((double)heap->cached_chunks_count + 0.9 > heap->avg_chunks_count &&
2228 heap->cached_chunks) {
2229 p = heap->cached_chunks;
2230 heap->cached_chunks = p->next;
2231 zend_mm_chunk_free(heap, p, ZEND_MM_CHUNK_SIZE);
2232 heap->cached_chunks_count--;
2233 }
2234 /* clear cached chunks */
2235 p = heap->cached_chunks;
2236 while (p != NULL) {
2237 zend_mm_chunk *q = p->next;
2238 memset(p, 0, sizeof(zend_mm_chunk));
2239 p->next = q;
2240 p = q;
2241 }
2242
2243 /* reinitialize the first chunk and heap */
2244 old_heap = *heap;
2245 p = heap->main_chunk;
2246 memset(p, 0, ZEND_MM_FIRST_PAGE * ZEND_MM_PAGE_SIZE);
2247 *heap = old_heap;
2248 memset(heap->free_slot, 0, sizeof(heap->free_slot));
2249 heap->main_chunk = p;
2250 p->heap = &p->heap_slot;
2251 p->next = p;
2252 p->prev = p;
2253 p->free_pages = ZEND_MM_PAGES - ZEND_MM_FIRST_PAGE;
2254 p->free_tail = ZEND_MM_FIRST_PAGE;
2255 p->free_map[0] = (1L << ZEND_MM_FIRST_PAGE) - 1;
2256 p->map[0] = ZEND_MM_LRUN(ZEND_MM_FIRST_PAGE);
2257 heap->chunks_count = 1;
2258 heap->peak_chunks_count = 1;
2259 heap->last_chunks_delete_boundary = 0;
2260 heap->last_chunks_delete_count = 0;
2261 #if ZEND_MM_STAT || ZEND_MM_LIMIT
2262 heap->real_size = ZEND_MM_CHUNK_SIZE;
2263 #endif
2264 #if ZEND_MM_STAT
2265 heap->real_peak = ZEND_MM_CHUNK_SIZE;
2266 heap->size = heap->peak = 0;
2267 #endif
2268 }
2269 }
2270
2271 /**************/
2272 /* PUBLIC API */
2273 /**************/
2274
2275 ZEND_API void* ZEND_FASTCALL _zend_mm_alloc(zend_mm_heap *heap, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
2276 {
2277 return zend_mm_alloc_heap(heap, size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
2278 }
2279
2280 ZEND_API void ZEND_FASTCALL _zend_mm_free(zend_mm_heap *heap, void *ptr ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
2281 {
2282 zend_mm_free_heap(heap, ptr ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
2283 }
2284
2285 void* ZEND_FASTCALL _zend_mm_realloc(zend_mm_heap *heap, void *ptr, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
2286 {
2287 return zend_mm_realloc_heap(heap, ptr, size, size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
2288 }
2289
2290 void* ZEND_FASTCALL _zend_mm_realloc2(zend_mm_heap *heap, void *ptr, size_t size, size_t copy_size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
2291 {
2292 return zend_mm_realloc_heap(heap, ptr, size, copy_size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
2293 }
2294
2295 ZEND_API size_t ZEND_FASTCALL _zend_mm_block_size(zend_mm_heap *heap, void *ptr ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
2296 {
2297 return zend_mm_size(heap, ptr ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
2298 }
2299
2300 /**********************/
2301 /* Allocation Manager */
2302 /**********************/
2303
2304 typedef struct _zend_alloc_globals {
2305 zend_mm_heap *mm_heap;
2306 } zend_alloc_globals;
2307
2308 #ifdef ZTS
2309 static int alloc_globals_id;
2310 # define AG(v) ZEND_TSRMG(alloc_globals_id, zend_alloc_globals *, v)
2311 #else
2312 # define AG(v) (alloc_globals.v)
2313 static zend_alloc_globals alloc_globals;
2314 #endif
2315
2316 ZEND_API int is_zend_mm(void)
2317 {
2318 #if ZEND_MM_CUSTOM
2319 return !AG(mm_heap)->use_custom_heap;
2320 #else
2321 return 1;
2322 #endif
2323 }
2324
2325 #if !ZEND_DEBUG && defined(HAVE_BUILTIN_CONSTANT_P)
2326 #undef _emalloc
2327
2328 #if ZEND_MM_CUSTOM
2329 # define ZEND_MM_CUSTOM_ALLOCATOR(size) do { \
2330 if (UNEXPECTED(AG(mm_heap)->use_custom_heap)) { \
2331 if (ZEND_DEBUG && AG(mm_heap)->use_custom_heap == ZEND_MM_CUSTOM_HEAP_DEBUG) { \
2332 return AG(mm_heap)->custom_heap.debug._malloc(size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC); \
2333 } else { \
2334 return AG(mm_heap)->custom_heap.std._malloc(size); \
2335 } \
2336 } \
2337 } while (0)
2338 # define ZEND_MM_CUSTOM_DEALLOCATOR(ptr) do { \
2339 if (UNEXPECTED(AG(mm_heap)->use_custom_heap)) { \
2340 if (ZEND_DEBUG && AG(mm_heap)->use_custom_heap == ZEND_MM_CUSTOM_HEAP_DEBUG) { \
2341 AG(mm_heap)->custom_heap.debug._free(ptr ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC); \
2342 } else { \
2343 AG(mm_heap)->custom_heap.std._free(ptr); \
2344 } \
2345 return; \
2346 } \
2347 } while (0)
2348 #else
2349 # define ZEND_MM_CUSTOM_ALLOCATOR(size)
2350 # define ZEND_MM_CUSTOM_DEALLOCATOR(ptr)
2351 #endif
2352
2353 # define _ZEND_BIN_ALLOCATOR(_num, _size, _elements, _pages, x, y) \
2354 ZEND_API void* ZEND_FASTCALL _emalloc_ ## _size(void) { \
2355 ZEND_MM_CUSTOM_ALLOCATOR(_size); \
2356 return zend_mm_alloc_small(AG(mm_heap), _size, _num ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC); \
2357 }
2358
2359 ZEND_MM_BINS_INFO(_ZEND_BIN_ALLOCATOR, x, y)
2360
2361 ZEND_API void* ZEND_FASTCALL _emalloc_large(size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
2362 {
2363
2364 ZEND_MM_CUSTOM_ALLOCATOR(size);
2365 return zend_mm_alloc_large(AG(mm_heap), size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
2366 }
2367
2368 ZEND_API void* ZEND_FASTCALL _emalloc_huge(size_t size)
2369 {
2370
2371 ZEND_MM_CUSTOM_ALLOCATOR(size);
2372 return zend_mm_alloc_huge(AG(mm_heap), size);
2373 }
2374
2375 #if ZEND_DEBUG
2376 # define _ZEND_BIN_FREE(_num, _size, _elements, _pages, x, y) \
2377 ZEND_API void ZEND_FASTCALL _efree_ ## _size(void *ptr) { \
2378 ZEND_MM_CUSTOM_DEALLOCATOR(ptr); \
2379 { \
2380 size_t page_offset = ZEND_MM_ALIGNED_OFFSET(ptr, ZEND_MM_CHUNK_SIZE); \
2381 zend_mm_chunk *chunk = (zend_mm_chunk*)ZEND_MM_ALIGNED_BASE(ptr, ZEND_MM_CHUNK_SIZE); \
2382 int page_num = page_offset / ZEND_MM_PAGE_SIZE; \
2383 ZEND_MM_CHECK(chunk->heap == AG(mm_heap), "zend_mm_heap corrupted"); \
2384 ZEND_ASSERT(chunk->map[page_num] & ZEND_MM_IS_SRUN); \
2385 ZEND_ASSERT(ZEND_MM_SRUN_BIN_NUM(chunk->map[page_num]) == _num); \
2386 zend_mm_free_small(AG(mm_heap), ptr, _num); \
2387 } \
2388 }
2389 #else
2390 # define _ZEND_BIN_FREE(_num, _size, _elements, _pages, x, y) \
2391 ZEND_API void ZEND_FASTCALL _efree_ ## _size(void *ptr) { \
2392 ZEND_MM_CUSTOM_DEALLOCATOR(ptr); \
2393 { \
2394 zend_mm_chunk *chunk = (zend_mm_chunk*)ZEND_MM_ALIGNED_BASE(ptr, ZEND_MM_CHUNK_SIZE); \
2395 ZEND_MM_CHECK(chunk->heap == AG(mm_heap), "zend_mm_heap corrupted"); \
2396 zend_mm_free_small(AG(mm_heap), ptr, _num); \
2397 } \
2398 }
2399 #endif
2400
2401 ZEND_MM_BINS_INFO(_ZEND_BIN_FREE, x, y)
2402
2403 ZEND_API void ZEND_FASTCALL _efree_large(void *ptr, size_t size)
2404 {
2405
2406 ZEND_MM_CUSTOM_DEALLOCATOR(ptr);
2407 {
2408 size_t page_offset = ZEND_MM_ALIGNED_OFFSET(ptr, ZEND_MM_CHUNK_SIZE);
2409 zend_mm_chunk *chunk = (zend_mm_chunk*)ZEND_MM_ALIGNED_BASE(ptr, ZEND_MM_CHUNK_SIZE);
2410 int page_num = page_offset / ZEND_MM_PAGE_SIZE;
2411 uint32_t pages_count = ZEND_MM_ALIGNED_SIZE_EX(size, ZEND_MM_PAGE_SIZE) / ZEND_MM_PAGE_SIZE;
2412
2413 ZEND_MM_CHECK(chunk->heap == AG(mm_heap) && ZEND_MM_ALIGNED_OFFSET(page_offset, ZEND_MM_PAGE_SIZE) == 0, "zend_mm_heap corrupted");
2414 ZEND_ASSERT(chunk->map[page_num] & ZEND_MM_IS_LRUN);
2415 ZEND_ASSERT(ZEND_MM_LRUN_PAGES(chunk->map[page_num]) == pages_count);
2416 zend_mm_free_large(AG(mm_heap), chunk, page_num, pages_count);
2417 }
2418 }
2419
2420 ZEND_API void ZEND_FASTCALL _efree_huge(void *ptr, size_t size)
2421 {
2422
2423 ZEND_MM_CUSTOM_DEALLOCATOR(ptr);
2424 zend_mm_free_huge(AG(mm_heap), ptr);
2425 }
2426 #endif
2427
2428 ZEND_API void* ZEND_FASTCALL _emalloc(size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
2429 {
2430
2431 #if ZEND_MM_CUSTOM
2432 if (UNEXPECTED(AG(mm_heap)->use_custom_heap)) {
2433 if (ZEND_DEBUG && AG(mm_heap)->use_custom_heap == ZEND_MM_CUSTOM_HEAP_DEBUG) {
2434 return AG(mm_heap)->custom_heap.debug._malloc(size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
2435 } else {
2436 return AG(mm_heap)->custom_heap.std._malloc(size);
2437 }
2438 }
2439 #endif
2440 return zend_mm_alloc_heap(AG(mm_heap), size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
2441 }
2442
2443 ZEND_API void ZEND_FASTCALL _efree(void *ptr ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
2444 {
2445
2446 #if ZEND_MM_CUSTOM
2447 if (UNEXPECTED(AG(mm_heap)->use_custom_heap)) {
2448 if (ZEND_DEBUG && AG(mm_heap)->use_custom_heap == ZEND_MM_CUSTOM_HEAP_DEBUG) {
2449 AG(mm_heap)->custom_heap.debug._free(ptr ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
2450 } else {
2451 AG(mm_heap)->custom_heap.std._free(ptr);
2452 }
2453 return;
2454 }
2455 #endif
2456 zend_mm_free_heap(AG(mm_heap), ptr ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
2457 }
2458
2459 ZEND_API void* ZEND_FASTCALL _erealloc(void *ptr, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
2460 {
2461
2462 if (UNEXPECTED(AG(mm_heap)->use_custom_heap)) {
2463 if (ZEND_DEBUG && AG(mm_heap)->use_custom_heap == ZEND_MM_CUSTOM_HEAP_DEBUG) {
2464 return AG(mm_heap)->custom_heap.debug._realloc(ptr, size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
2465 } else {
2466 return AG(mm_heap)->custom_heap.std._realloc(ptr, size);
2467 }
2468 }
2469 return zend_mm_realloc_heap(AG(mm_heap), ptr, size, size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
2470 }
2471
2472 ZEND_API void* ZEND_FASTCALL _erealloc2(void *ptr, size_t size, size_t copy_size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
2473 {
2474
2475 if (UNEXPECTED(AG(mm_heap)->use_custom_heap)) {
2476 if (ZEND_DEBUG && AG(mm_heap)->use_custom_heap == ZEND_MM_CUSTOM_HEAP_DEBUG) {
2477 return AG(mm_heap)->custom_heap.debug._realloc(ptr, size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
2478 } else {
2479 return AG(mm_heap)->custom_heap.std._realloc(ptr, size);
2480 }
2481 }
2482 return zend_mm_realloc_heap(AG(mm_heap), ptr, size, copy_size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
2483 }
2484
2485 ZEND_API size_t ZEND_FASTCALL _zend_mem_block_size(void *ptr ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
2486 {
2487 if (UNEXPECTED(AG(mm_heap)->use_custom_heap)) {
2488 return 0;
2489 }
2490 return zend_mm_size(AG(mm_heap), ptr ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
2491 }
2492
2493 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)
2494 {
2495 return emalloc_rel(zend_safe_address_guarded(nmemb, size, offset));
2496 }
2497
2498 ZEND_API void* ZEND_FASTCALL _safe_malloc(size_t nmemb, size_t size, size_t offset)
2499 {
2500 return pemalloc(zend_safe_address_guarded(nmemb, size, offset), 1);
2501 }
2502
2503 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)
2504 {
2505 return erealloc_rel(ptr, zend_safe_address_guarded(nmemb, size, offset));
2506 }
2507
2508 ZEND_API void* ZEND_FASTCALL _safe_realloc(void *ptr, size_t nmemb, size_t size, size_t offset)
2509 {
2510 return perealloc(ptr, zend_safe_address_guarded(nmemb, size, offset), 1);
2511 }
2512
2513
2514 ZEND_API void* ZEND_FASTCALL _ecalloc(size_t nmemb, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
2515 {
2516 void *p;
2517
2518 p = _safe_emalloc(nmemb, size, 0 ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
2519 memset(p, 0, size * nmemb);
2520 return p;
2521 }
2522
2523 ZEND_API char* ZEND_FASTCALL _estrdup(const char *s ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
2524 {
2525 size_t length;
2526 char *p;
2527
2528 length = strlen(s);
2529 if (UNEXPECTED(length + 1 == 0)) {
2530 zend_error_noreturn(E_ERROR, "Possible integer overflow in memory allocation (1 * %zu + 1)", length);
2531 }
2532 p = (char *) _emalloc(length + 1 ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
2533 memcpy(p, s, length+1);
2534 return p;
2535 }
2536
2537 ZEND_API char* ZEND_FASTCALL _estrndup(const char *s, size_t length ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
2538 {
2539 char *p;
2540
2541 if (UNEXPECTED(length + 1 == 0)) {
2542 zend_error_noreturn(E_ERROR, "Possible integer overflow in memory allocation (1 * %zu + 1)", length);
2543 }
2544 p = (char *) _emalloc(length + 1 ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
2545 memcpy(p, s, length);
2546 p[length] = 0;
2547 return p;
2548 }
2549
2550
2551 ZEND_API char* ZEND_FASTCALL zend_strndup(const char *s, size_t length)
2552 {
2553 char *p;
2554
2555 if (UNEXPECTED(length + 1 == 0)) {
2556 zend_error_noreturn(E_ERROR, "Possible integer overflow in memory allocation (1 * %zu + 1)", length);
2557 }
2558 p = (char *) malloc(length + 1);
2559 if (UNEXPECTED(p == NULL)) {
2560 return p;
2561 }
2562 if (EXPECTED(length)) {
2563 memcpy(p, s, length);
2564 }
2565 p[length] = 0;
2566 return p;
2567 }
2568
2569
2570 ZEND_API int zend_set_memory_limit(size_t memory_limit)
2571 {
2572 #if ZEND_MM_LIMIT
2573 AG(mm_heap)->limit = (memory_limit >= ZEND_MM_CHUNK_SIZE) ? memory_limit : ZEND_MM_CHUNK_SIZE;
2574 #endif
2575 return SUCCESS;
2576 }
2577
2578 ZEND_API size_t zend_memory_usage(int real_usage)
2579 {
2580 #if ZEND_MM_STAT
2581 if (real_usage) {
2582 return AG(mm_heap)->real_size;
2583 } else {
2584 size_t usage = AG(mm_heap)->size;
2585 return usage;
2586 }
2587 #endif
2588 return 0;
2589 }
2590
2591 ZEND_API size_t zend_memory_peak_usage(int real_usage)
2592 {
2593 #if ZEND_MM_STAT
2594 if (real_usage) {
2595 return AG(mm_heap)->real_peak;
2596 } else {
2597 return AG(mm_heap)->peak;
2598 }
2599 #endif
2600 return 0;
2601 }
2602
2603 ZEND_API void shutdown_memory_manager(int silent, int full_shutdown)
2604 {
2605 zend_mm_shutdown(AG(mm_heap), full_shutdown, silent);
2606 }
2607
2608 static void alloc_globals_ctor(zend_alloc_globals *alloc_globals)
2609 {
2610 char *tmp;
2611 #if ZEND_MM_CUSTOM
2612 tmp = getenv("USE_ZEND_ALLOC");
2613
2614 if (tmp && !zend_atoi(tmp, 0)) {
2615 alloc_globals->mm_heap = malloc(sizeof(zend_mm_heap));
2616 memset(alloc_globals->mm_heap, 0, sizeof(zend_mm_heap));
2617 alloc_globals->mm_heap->use_custom_heap = ZEND_MM_CUSTOM_HEAP_STD;
2618 alloc_globals->mm_heap->custom_heap.std._malloc = __zend_malloc;
2619 alloc_globals->mm_heap->custom_heap.std._free = free;
2620 alloc_globals->mm_heap->custom_heap.std._realloc = __zend_realloc;
2621 return;
2622 }
2623 #endif
2624 tmp = getenv("USE_ZEND_ALLOC_HUGE_PAGES");
2625 if (tmp && zend_atoi(tmp, 0)) {
2626 zend_mm_use_huge_pages = 1;
2627 }
2628 ZEND_TSRMLS_CACHE_UPDATE();
2629 alloc_globals->mm_heap = zend_mm_init();
2630 }
2631
2632 #ifdef ZTS
2633 static void alloc_globals_dtor(zend_alloc_globals *alloc_globals)
2634 {
2635 zend_mm_shutdown(alloc_globals->mm_heap, 1, 1);
2636 }
2637 #endif
2638
2639 ZEND_API void start_memory_manager(void)
2640 {
2641 #ifdef ZTS
2642 ts_allocate_id(&alloc_globals_id, sizeof(zend_alloc_globals), (ts_allocate_ctor) alloc_globals_ctor, (ts_allocate_dtor) alloc_globals_dtor);
2643 #else
2644 alloc_globals_ctor(&alloc_globals);
2645 #endif
2646 #ifndef _WIN32
2647 # if defined(_SC_PAGESIZE)
2648 REAL_PAGE_SIZE = sysconf(_SC_PAGESIZE);
2649 # elif defined(_SC_PAGE_SIZE)
2650 REAL_PAGE_SIZE = sysconf(_SC_PAGE_SIZE);
2651 # endif
2652 #endif
2653 }
2654
2655 ZEND_API zend_mm_heap *zend_mm_set_heap(zend_mm_heap *new_heap)
2656 {
2657 zend_mm_heap *old_heap;
2658
2659 old_heap = AG(mm_heap);
2660 AG(mm_heap) = (zend_mm_heap*)new_heap;
2661 return (zend_mm_heap*)old_heap;
2662 }
2663
2664 ZEND_API zend_mm_heap *zend_mm_get_heap(void)
2665 {
2666 return AG(mm_heap);
2667 }
2668
2669 ZEND_API int zend_mm_is_custom_heap(zend_mm_heap *new_heap)
2670 {
2671 #if ZEND_MM_CUSTOM
2672 return AG(mm_heap)->use_custom_heap;
2673 #else
2674 return 0;
2675 #endif
2676 }
2677
2678 ZEND_API void zend_mm_set_custom_handlers(zend_mm_heap *heap,
2679 void* (*_malloc)(size_t),
2680 void (*_free)(void*),
2681 void* (*_realloc)(void*, size_t))
2682 {
2683 #if ZEND_MM_CUSTOM
2684 zend_mm_heap *_heap = (zend_mm_heap*)heap;
2685
2686 _heap->use_custom_heap = ZEND_MM_CUSTOM_HEAP_STD;
2687 _heap->custom_heap.std._malloc = _malloc;
2688 _heap->custom_heap.std._free = _free;
2689 _heap->custom_heap.std._realloc = _realloc;
2690 #endif
2691 }
2692
2693 ZEND_API void zend_mm_get_custom_handlers(zend_mm_heap *heap,
2694 void* (**_malloc)(size_t),
2695 void (**_free)(void*),
2696 void* (**_realloc)(void*, size_t))
2697 {
2698 #if ZEND_MM_CUSTOM
2699 zend_mm_heap *_heap = (zend_mm_heap*)heap;
2700
2701 if (heap->use_custom_heap) {
2702 *_malloc = _heap->custom_heap.std._malloc;
2703 *_free = _heap->custom_heap.std._free;
2704 *_realloc = _heap->custom_heap.std._realloc;
2705 } else {
2706 *_malloc = NULL;
2707 *_free = NULL;
2708 *_realloc = NULL;
2709 }
2710 #else
2711 *_malloc = NULL;
2712 *_free = NULL;
2713 *_realloc = NULL;
2714 #endif
2715 }
2716
2717 #if ZEND_DEBUG
2718 ZEND_API void zend_mm_set_custom_debug_handlers(zend_mm_heap *heap,
2719 void* (*_malloc)(size_t ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC),
2720 void (*_free)(void* ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC),
2721 void* (*_realloc)(void*, size_t ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC))
2722 {
2723 #if ZEND_MM_CUSTOM
2724 zend_mm_heap *_heap = (zend_mm_heap*)heap;
2725
2726 _heap->use_custom_heap = ZEND_MM_CUSTOM_HEAP_DEBUG;
2727 _heap->custom_heap.debug._malloc = _malloc;
2728 _heap->custom_heap.debug._free = _free;
2729 _heap->custom_heap.debug._realloc = _realloc;
2730 #endif
2731 }
2732 #endif
2733
2734 ZEND_API zend_mm_storage *zend_mm_get_storage(zend_mm_heap *heap)
2735 {
2736 #if ZEND_MM_STORAGE
2737 return heap->storage;
2738 #else
2739 return NULL
2740 #endif
2741 }
2742
2743 ZEND_API zend_mm_heap *zend_mm_startup(void)
2744 {
2745 return zend_mm_init();
2746 }
2747
2748 ZEND_API zend_mm_heap *zend_mm_startup_ex(const zend_mm_handlers *handlers, void *data, size_t data_size)
2749 {
2750 #if ZEND_MM_STORAGE
2751 zend_mm_storage tmp_storage, *storage;
2752 zend_mm_chunk *chunk;
2753 zend_mm_heap *heap;
2754
2755 memcpy((zend_mm_handlers*)&tmp_storage.handlers, handlers, sizeof(zend_mm_handlers));
2756 tmp_storage.data = data;
2757 chunk = (zend_mm_chunk*)handlers->chunk_alloc(&tmp_storage, ZEND_MM_CHUNK_SIZE, ZEND_MM_CHUNK_SIZE);
2758 if (UNEXPECTED(chunk == NULL)) {
2759 #if ZEND_MM_ERROR
2760 #ifdef _WIN32
2761 stderr_last_error("Can't initialize heap");
2762 #else
2763 fprintf(stderr, "\nCan't initialize heap: [%d] %s\n", errno, strerror(errno));
2764 #endif
2765 #endif
2766 return NULL;
2767 }
2768 heap = &chunk->heap_slot;
2769 chunk->heap = heap;
2770 chunk->next = chunk;
2771 chunk->prev = chunk;
2772 chunk->free_pages = ZEND_MM_PAGES - ZEND_MM_FIRST_PAGE;
2773 chunk->free_tail = ZEND_MM_FIRST_PAGE;
2774 chunk->num = 0;
2775 chunk->free_map[0] = (Z_L(1) << ZEND_MM_FIRST_PAGE) - 1;
2776 chunk->map[0] = ZEND_MM_LRUN(ZEND_MM_FIRST_PAGE);
2777 heap->main_chunk = chunk;
2778 heap->cached_chunks = NULL;
2779 heap->chunks_count = 1;
2780 heap->peak_chunks_count = 1;
2781 heap->cached_chunks_count = 0;
2782 heap->avg_chunks_count = 1.0;
2783 heap->last_chunks_delete_boundary = 0;
2784 heap->last_chunks_delete_count = 0;
2785 #if ZEND_MM_STAT || ZEND_MM_LIMIT
2786 heap->real_size = ZEND_MM_CHUNK_SIZE;
2787 #endif
2788 #if ZEND_MM_STAT
2789 heap->real_peak = ZEND_MM_CHUNK_SIZE;
2790 heap->size = 0;
2791 heap->peak = 0;
2792 #endif
2793 #if ZEND_MM_LIMIT
2794 heap->limit = (Z_L(-1) >> Z_L(1));
2795 heap->overflow = 0;
2796 #endif
2797 #if ZEND_MM_CUSTOM
2798 heap->use_custom_heap = 0;
2799 #endif
2800 heap->storage = &tmp_storage;
2801 heap->huge_list = NULL;
2802 memset(heap->free_slot, 0, sizeof(heap->free_slot));
2803 storage = _zend_mm_alloc(heap, sizeof(zend_mm_storage) + data_size ZEND_FILE_LINE_CC ZEND_FILE_LINE_CC);
2804 if (!storage) {
2805 handlers->chunk_free(&tmp_storage, chunk, ZEND_MM_CHUNK_SIZE);
2806 #if ZEND_MM_ERROR
2807 #ifdef _WIN32
2808 stderr_last_error("Can't initialize heap");
2809 #else
2810 fprintf(stderr, "\nCan't initialize heap: [%d] %s\n", errno, strerror(errno));
2811 #endif
2812 #endif
2813 return NULL;
2814 }
2815 memcpy(storage, &tmp_storage, sizeof(zend_mm_storage));
2816 if (data) {
2817 storage->data = (void*)(((char*)storage + sizeof(zend_mm_storage)));
2818 memcpy(storage->data, data, data_size);
2819 }
2820 heap->storage = storage;
2821 return heap;
2822 #else
2823 return NULL;
2824 #endif
2825 }
2826
2827 static ZEND_COLD ZEND_NORETURN void zend_out_of_memory(void)
2828 {
2829 fprintf(stderr, "Out of memory\n");
2830 exit(1);
2831 }
2832
2833 ZEND_API void * __zend_malloc(size_t len)
2834 {
2835 void *tmp = malloc(len);
2836 if (EXPECTED(tmp || !len)) {
2837 return tmp;
2838 }
2839 zend_out_of_memory();
2840 }
2841
2842 ZEND_API void * __zend_calloc(size_t nmemb, size_t len)
2843 {
2844 void *tmp = _safe_malloc(nmemb, len, 0);
2845 memset(tmp, 0, nmemb * len);
2846 return tmp;
2847 }
2848
2849 ZEND_API void * __zend_realloc(void *p, size_t len)
2850 {
2851 p = realloc(p, len);
2852 if (EXPECTED(p || !len)) {
2853 return p;
2854 }
2855 zend_out_of_memory();
2856 }
2857
2858 /*
2859 * Local variables:
2860 * tab-width: 4
2861 * c-basic-offset: 4
2862 * indent-tabs-mode: t
2863 * End:
2864 * vim600: sw=4 ts=4 fdm=marker
2865 * vim<600: sw=4 ts=4
2866 */
2867
