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/* |
| 2 |
+----------------------------------------------------------------------+ |
| 3 |
| Suhosin-Patch for PHP | |
| 4 |
+----------------------------------------------------------------------+ |
| 5 |
| Copyright (c) 2004-2011 Stefan Esser | |
| 6 |
+----------------------------------------------------------------------+ |
| 7 |
| This source file is subject to version 2.02 of the PHP license, | |
| 8 |
| that is bundled with this package in the file LICENSE, and is | |
| 9 |
| available at through the world-wide-web at | |
| 10 |
| http://www.php.net/license/2_02.txt. | |
| 11 |
| If you did not receive a copy of the PHP license and are unable to | |
| 12 |
| obtain it through the world-wide-web, please send a note to | |
| 13 |
| license@php.net so we can mail you a copy immediately. | |
| 14 |
+----------------------------------------------------------------------+ |
| 15 |
| Author: Stefan Esser <stefan.esser@sektioneins.de> | |
| 16 |
+----------------------------------------------------------------------+ |
| 17 |
*/ |
| 18 |
/* $Id: zend_alloc_canary.c, $ */ |
| 19 |
|
| 20 |
#include "zend.h" |
| 21 |
#include "zend_alloc.h" |
| 22 |
#include "zend_globals.h" |
| 23 |
#include "zend_operators.h" |
| 24 |
|
| 25 |
#ifdef HAVE_SIGNAL_H |
| 26 |
# include <signal.h> |
| 27 |
#endif |
| 28 |
#ifdef HAVE_UNISTD_H |
| 29 |
# include <unistd.h> |
| 30 |
#endif |
| 31 |
|
| 32 |
#if SUHOSIN_PATCH |
| 33 |
#include "suhosin_patch.h" |
| 34 |
#endif |
| 35 |
|
| 36 |
#ifdef ZEND_WIN32 |
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# include <wincrypt.h> |
| 38 |
# include <process.h> |
| 39 |
#endif |
| 40 |
|
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#ifndef ZEND_MM_HEAP_PROTECTION |
| 42 |
# define ZEND_MM_HEAP_PROTECTION ZEND_DEBUG |
| 43 |
#endif |
| 44 |
|
| 45 |
#ifndef ZEND_MM_SAFE_UNLINKING |
| 46 |
# define ZEND_MM_SAFE_UNLINKING 1 |
| 47 |
#endif |
| 48 |
|
| 49 |
#ifndef ZEND_MM_COOKIES |
| 50 |
# define ZEND_MM_COOKIES ZEND_DEBUG |
| 51 |
#endif |
| 52 |
|
| 53 |
#ifdef _WIN64 |
| 54 |
# define PTR_FMT "0x%0.16I64x" |
| 55 |
/* |
| 56 |
#elif sizeof(long) == 8 |
| 57 |
# define PTR_FMT "0x%0.16lx" |
| 58 |
*/ |
| 59 |
#else |
| 60 |
# define PTR_FMT "0x%0.8lx" |
| 61 |
#endif |
| 62 |
|
| 63 |
#define SUHOSIN_MM_WITH_CANARY_PROTECTION 1 |
| 64 |
|
| 65 |
#if (defined (__GNUC__) && __GNUC__ > 2 ) && !defined(__INTEL_COMPILER) && !defined(DARWIN) && !defined(__hpux) && !defined(_AIX) |
| 66 |
static void zend_mm_panic(const char *message) __attribute__ ((noreturn)); |
| 67 |
#endif |
| 68 |
|
| 69 |
static void zend_mm_panic(const char *message) |
| 70 |
{ |
| 71 |
fprintf(stderr, "%s\n", message); |
| 72 |
/* See http://support.microsoft.com/kb/190351 */ |
| 73 |
#ifdef PHP_WIN32 |
| 74 |
fflush(stderr); |
| 75 |
#endif |
| 76 |
#if ZEND_DEBUG && defined(HAVE_KILL) && defined(HAVE_GETPID) |
| 77 |
kill(getpid(), SIGSEGV); |
| 78 |
#endif |
| 79 |
exit(1); |
| 80 |
} |
| 81 |
|
| 82 |
/*******************/ |
| 83 |
/* Storage Manager */ |
| 84 |
/*******************/ |
| 85 |
|
| 86 |
#ifdef ZEND_WIN32 |
| 87 |
# define HAVE_MEM_WIN32 /* use VirtualAlloc() to allocate memory */ |
| 88 |
#endif |
| 89 |
#define HAVE_MEM_MALLOC /* use malloc() to allocate segments */ |
| 90 |
|
| 91 |
#include <sys/types.h> |
| 92 |
#include <sys/stat.h> |
| 93 |
#if HAVE_LIMITS_H |
| 94 |
#include <limits.h> |
| 95 |
#endif |
| 96 |
#include <fcntl.h> |
| 97 |
#include <errno.h> |
| 98 |
|
| 99 |
#if defined(HAVE_MEM_MMAP_ANON) || defined(HAVE_MEM_MMAP_ZERO) |
| 100 |
# ifdef HAVE_MREMAP |
| 101 |
# ifndef _GNU_SOURCE |
| 102 |
# define _GNU_SOURCE |
| 103 |
# endif |
| 104 |
# ifndef __USE_GNU |
| 105 |
# define __USE_GNU |
| 106 |
# endif |
| 107 |
# endif |
| 108 |
# include <sys/mman.h> |
| 109 |
# ifndef MAP_ANON |
| 110 |
# ifdef MAP_ANONYMOUS |
| 111 |
# define MAP_ANON MAP_ANONYMOUS |
| 112 |
# endif |
| 113 |
# endif |
| 114 |
# ifndef MREMAP_MAYMOVE |
| 115 |
# define MREMAP_MAYMOVE 0 |
| 116 |
# endif |
| 117 |
# ifndef MAP_FAILED |
| 118 |
# define MAP_FAILED ((void*)-1) |
| 119 |
# endif |
| 120 |
#endif |
| 121 |
|
| 122 |
static zend_intptr_t SUHOSIN_POINTER_GUARD = 0; |
| 123 |
|
| 124 |
static zend_mm_storage* zend_mm_mem_dummy_init(void *params) |
| 125 |
{ |
| 126 |
return malloc(sizeof(zend_mm_storage)); |
| 127 |
} |
| 128 |
|
| 129 |
static void zend_mm_mem_dummy_dtor(zend_mm_storage *storage) |
| 130 |
{ |
| 131 |
free(storage); |
| 132 |
} |
| 133 |
|
| 134 |
static void zend_mm_mem_dummy_compact(zend_mm_storage *storage) |
| 135 |
{ |
| 136 |
} |
| 137 |
|
| 138 |
#if defined(HAVE_MEM_MMAP_ANON) || defined(HAVE_MEM_MMAP_ZERO) |
| 139 |
|
| 140 |
static zend_mm_segment* zend_mm_mem_mmap_realloc(zend_mm_storage *storage, zend_mm_segment* segment, size_t size) |
| 141 |
{ |
| 142 |
zend_mm_segment *ret; |
| 143 |
#ifdef HAVE_MREMAP |
| 144 |
#if defined(__NetBSD__) |
| 145 |
/* NetBSD 5 supports mremap but takes an extra newp argument */ |
| 146 |
ret = (zend_mm_segment*)mremap(segment, segment->size, segment, size, MREMAP_MAYMOVE); |
| 147 |
#else |
| 148 |
ret = (zend_mm_segment*)mremap(segment, segment->size, size, MREMAP_MAYMOVE); |
| 149 |
#endif |
| 150 |
if (ret == MAP_FAILED) { |
| 151 |
#endif |
| 152 |
ret = storage->handlers->_alloc(storage, size); |
| 153 |
if (ret) { |
| 154 |
memcpy(ret, segment, size > segment->size ? segment->size : size); |
| 155 |
storage->handlers->_free(storage, segment); |
| 156 |
} |
| 157 |
#ifdef HAVE_MREMAP |
| 158 |
} |
| 159 |
#endif |
| 160 |
return ret; |
| 161 |
} |
| 162 |
|
| 163 |
static void zend_mm_mem_mmap_free(zend_mm_storage *storage, zend_mm_segment* segment) |
| 164 |
{ |
| 165 |
munmap((void*)segment, segment->size); |
| 166 |
} |
| 167 |
|
| 168 |
#endif |
| 169 |
|
| 170 |
#ifdef HAVE_MEM_MMAP_ANON |
| 171 |
|
| 172 |
static zend_mm_segment* zend_mm_mem_mmap_anon_alloc(zend_mm_storage *storage, size_t size) |
| 173 |
{ |
| 174 |
zend_mm_segment *ret = (zend_mm_segment*)mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON, -1, 0); |
| 175 |
if (ret == MAP_FAILED) { |
| 176 |
ret = NULL; |
| 177 |
} |
| 178 |
return ret; |
| 179 |
} |
| 180 |
|
| 181 |
# define ZEND_MM_MEM_MMAP_ANON_DSC {"mmap_anon", zend_mm_mem_dummy_init, zend_mm_mem_dummy_dtor, zend_mm_mem_dummy_compact, zend_mm_mem_mmap_anon_alloc, zend_mm_mem_mmap_realloc, zend_mm_mem_mmap_free} |
| 182 |
|
| 183 |
#endif |
| 184 |
|
| 185 |
#ifdef HAVE_MEM_MMAP_ZERO |
| 186 |
|
| 187 |
static int zend_mm_dev_zero_fd = -1; |
| 188 |
|
| 189 |
static zend_mm_storage* zend_mm_mem_mmap_zero_init(void *params) |
| 190 |
{ |
| 191 |
if (zend_mm_dev_zero_fd != -1) { |
| 192 |
zend_mm_dev_zero_fd = open("/dev/zero", O_RDWR, S_IRUSR | S_IWUSR); |
| 193 |
} |
| 194 |
if (zend_mm_dev_zero_fd >= 0) { |
| 195 |
return malloc(sizeof(zend_mm_storage)); |
| 196 |
} else { |
| 197 |
return NULL; |
| 198 |
} |
| 199 |
} |
| 200 |
|
| 201 |
static void zend_mm_mem_mmap_zero_dtor(zend_mm_storage *storage) |
| 202 |
{ |
| 203 |
close(zend_mm_dev_zero_fd); |
| 204 |
free(storage); |
| 205 |
} |
| 206 |
|
| 207 |
static zend_mm_segment* zend_mm_mem_mmap_zero_alloc(zend_mm_storage *storage, size_t size) |
| 208 |
{ |
| 209 |
zend_mm_segment *ret = (zend_mm_segment*)mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_PRIVATE, zend_mm_dev_zero_fd, 0); |
| 210 |
if (ret == MAP_FAILED) { |
| 211 |
ret = NULL; |
| 212 |
} |
| 213 |
return ret; |
| 214 |
} |
| 215 |
|
| 216 |
# define ZEND_MM_MEM_MMAP_ZERO_DSC {"mmap_zero", zend_mm_mem_mmap_zero_init, zend_mm_mem_mmap_zero_dtor, zend_mm_mem_dummy_compact, zend_mm_mem_mmap_zero_alloc, zend_mm_mem_mmap_realloc, zend_mm_mem_mmap_free} |
| 217 |
|
| 218 |
#endif |
| 219 |
|
| 220 |
#ifdef HAVE_MEM_WIN32 |
| 221 |
|
| 222 |
static zend_mm_storage* zend_mm_mem_win32_init(void *params) |
| 223 |
{ |
| 224 |
HANDLE heap = HeapCreate(HEAP_NO_SERIALIZE, 0, 0); |
| 225 |
zend_mm_storage* storage; |
| 226 |
|
| 227 |
if (heap == NULL) { |
| 228 |
return NULL; |
| 229 |
} |
| 230 |
storage = (zend_mm_storage*)malloc(sizeof(zend_mm_storage)); |
| 231 |
if (storage == NULL) { |
| 232 |
HeapDestroy(heap); |
| 233 |
return NULL; |
| 234 |
} |
| 235 |
storage->data = (void*) heap; |
| 236 |
return storage; |
| 237 |
} |
| 238 |
|
| 239 |
static void zend_mm_mem_win32_dtor(zend_mm_storage *storage) |
| 240 |
{ |
| 241 |
HeapDestroy((HANDLE)storage->data); |
| 242 |
free(storage); |
| 243 |
} |
| 244 |
|
| 245 |
static void zend_mm_mem_win32_compact(zend_mm_storage *storage) |
| 246 |
{ |
| 247 |
HeapDestroy((HANDLE)storage->data); |
| 248 |
storage->data = (void*)HeapCreate(HEAP_NO_SERIALIZE, 0, 0); |
| 249 |
} |
| 250 |
|
| 251 |
static zend_mm_segment* zend_mm_mem_win32_alloc(zend_mm_storage *storage, size_t size) |
| 252 |
{ |
| 253 |
return (zend_mm_segment*) HeapAlloc((HANDLE)storage->data, HEAP_NO_SERIALIZE, size); |
| 254 |
} |
| 255 |
|
| 256 |
static void zend_mm_mem_win32_free(zend_mm_storage *storage, zend_mm_segment* segment) |
| 257 |
{ |
| 258 |
HeapFree((HANDLE)storage->data, HEAP_NO_SERIALIZE, segment); |
| 259 |
} |
| 260 |
|
| 261 |
static zend_mm_segment* zend_mm_mem_win32_realloc(zend_mm_storage *storage, zend_mm_segment* segment, size_t size) |
| 262 |
{ |
| 263 |
return (zend_mm_segment*) HeapReAlloc((HANDLE)storage->data, HEAP_NO_SERIALIZE, segment, size); |
| 264 |
} |
| 265 |
|
| 266 |
# define ZEND_MM_MEM_WIN32_DSC {"win32", zend_mm_mem_win32_init, zend_mm_mem_win32_dtor, zend_mm_mem_win32_compact, zend_mm_mem_win32_alloc, zend_mm_mem_win32_realloc, zend_mm_mem_win32_free} |
| 267 |
|
| 268 |
#endif |
| 269 |
|
| 270 |
#ifdef HAVE_MEM_MALLOC |
| 271 |
|
| 272 |
static zend_mm_segment* zend_mm_mem_malloc_alloc(zend_mm_storage *storage, size_t size) |
| 273 |
{ |
| 274 |
return (zend_mm_segment*)malloc(size); |
| 275 |
} |
| 276 |
|
| 277 |
static zend_mm_segment* zend_mm_mem_malloc_realloc(zend_mm_storage *storage, zend_mm_segment *ptr, size_t size) |
| 278 |
{ |
| 279 |
return (zend_mm_segment*)realloc(ptr, size); |
| 280 |
} |
| 281 |
|
| 282 |
static void zend_mm_mem_malloc_free(zend_mm_storage *storage, zend_mm_segment *ptr) |
| 283 |
{ |
| 284 |
free(ptr); |
| 285 |
} |
| 286 |
|
| 287 |
# define ZEND_MM_MEM_MALLOC_DSC {"malloc", zend_mm_mem_dummy_init, zend_mm_mem_dummy_dtor, zend_mm_mem_dummy_compact, zend_mm_mem_malloc_alloc, zend_mm_mem_malloc_realloc, zend_mm_mem_malloc_free} |
| 288 |
|
| 289 |
#endif |
| 290 |
|
| 291 |
static const zend_mm_mem_handlers mem_handlers[] = { |
| 292 |
#ifdef HAVE_MEM_WIN32 |
| 293 |
ZEND_MM_MEM_WIN32_DSC, |
| 294 |
#endif |
| 295 |
#ifdef HAVE_MEM_MALLOC |
| 296 |
ZEND_MM_MEM_MALLOC_DSC, |
| 297 |
#endif |
| 298 |
#ifdef HAVE_MEM_MMAP_ANON |
| 299 |
ZEND_MM_MEM_MMAP_ANON_DSC, |
| 300 |
#endif |
| 301 |
#ifdef HAVE_MEM_MMAP_ZERO |
| 302 |
ZEND_MM_MEM_MMAP_ZERO_DSC, |
| 303 |
#endif |
| 304 |
{NULL, NULL, NULL, NULL, NULL, NULL} |
| 305 |
}; |
| 306 |
|
| 307 |
# define ZEND_MM_STORAGE_DTOR() heap->storage->handlers->dtor(heap->storage) |
| 308 |
# define ZEND_MM_STORAGE_ALLOC(size) heap->storage->handlers->_alloc(heap->storage, size) |
| 309 |
# define ZEND_MM_STORAGE_REALLOC(ptr, size) heap->storage->handlers->_realloc(heap->storage, ptr, size) |
| 310 |
# define ZEND_MM_STORAGE_FREE(ptr) heap->storage->handlers->_free(heap->storage, ptr) |
| 311 |
|
| 312 |
/****************/ |
| 313 |
/* Heap Manager */ |
| 314 |
/****************/ |
| 315 |
|
| 316 |
#define MEM_BLOCK_VALID 0x7312F8DC |
| 317 |
#define MEM_BLOCK_FREED 0x99954317 |
| 318 |
#define MEM_BLOCK_CACHED 0xFB8277DC |
| 319 |
#define MEM_BLOCK_GUARD 0x2A8FCC84 |
| 320 |
#define MEM_BLOCK_LEAK 0x6C5E8F2D |
| 321 |
|
| 322 |
#if SUHOSIN_MM_WITH_CANARY_PROTECTION |
| 323 |
# define CANARY_SIZE sizeof(size_t) |
| 324 |
#else |
| 325 |
# define CANARY_SIZE 0 |
| 326 |
#endif |
| 327 |
|
| 328 |
/* mm block type */ |
| 329 |
typedef struct _zend_mm_block_info_canary { |
| 330 |
#if ZEND_MM_COOKIES |
| 331 |
size_t _cookie; |
| 332 |
#endif |
| 333 |
#if SUHOSIN_MM_WITH_CANARY_PROTECTION |
| 334 |
size_t canary_1; |
| 335 |
#endif |
| 336 |
size_t _size; |
| 337 |
size_t _prev; |
| 338 |
#if SUHOSIN_PATCH |
| 339 |
size_t size; |
| 340 |
#if SUHOSIN_MM_WITH_CANARY_PROTECTION |
| 341 |
size_t canary_2; |
| 342 |
#endif |
| 343 |
#endif |
| 344 |
} zend_mm_block_info_canary; |
| 345 |
|
| 346 |
#if ZEND_DEBUG |
| 347 |
|
| 348 |
typedef struct _zend_mm_debug_info_canary { |
| 349 |
char *filename; |
| 350 |
uint lineno; |
| 351 |
char *orig_filename; |
| 352 |
uint orig_lineno; |
| 353 |
size_t size; |
| 354 |
#if ZEND_MM_HEAP_PROTECTION |
| 355 |
unsigned int start_magic; |
| 356 |
#endif |
| 357 |
} zend_mm_debug_info_canary; |
| 358 |
|
| 359 |
#elif ZEND_MM_HEAP_PROTECTION |
| 360 |
|
| 361 |
typedef struct _zend_mm_debug_info_canary { |
| 362 |
size_t size; |
| 363 |
unsigned int start_magic; |
| 364 |
} zend_mm_debug_info_canary; |
| 365 |
|
| 366 |
#endif |
| 367 |
|
| 368 |
typedef struct _zend_mm_block_canary { |
| 369 |
zend_mm_block_info_canary info; |
| 370 |
#if ZEND_DEBUG |
| 371 |
unsigned int magic; |
| 372 |
# ifdef ZTS |
| 373 |
THREAD_T thread_id; |
| 374 |
# endif |
| 375 |
zend_mm_debug_info_canary debug; |
| 376 |
#elif ZEND_MM_HEAP_PROTECTION |
| 377 |
zend_mm_debug_info_canary debug; |
| 378 |
#endif |
| 379 |
} zend_mm_block_canary; |
| 380 |
|
| 381 |
typedef struct _zend_mm_small_free_block_canary { |
| 382 |
zend_mm_block_info_canary info; |
| 383 |
#if ZEND_DEBUG |
| 384 |
unsigned int magic; |
| 385 |
# ifdef ZTS |
| 386 |
THREAD_T thread_id; |
| 387 |
# endif |
| 388 |
#endif |
| 389 |
struct _zend_mm_free_block_canary *prev_free_block; |
| 390 |
struct _zend_mm_free_block_canary *next_free_block; |
| 391 |
} zend_mm_small_free_block_canary; |
| 392 |
|
| 393 |
typedef struct _zend_mm_free_block_canary { |
| 394 |
zend_mm_block_info_canary info; |
| 395 |
#if ZEND_DEBUG |
| 396 |
unsigned int magic; |
| 397 |
# ifdef ZTS |
| 398 |
THREAD_T thread_id; |
| 399 |
# endif |
| 400 |
#endif |
| 401 |
struct _zend_mm_free_block_canary *prev_free_block; |
| 402 |
struct _zend_mm_free_block_canary *next_free_block; |
| 403 |
|
| 404 |
struct _zend_mm_free_block_canary **parent; |
| 405 |
struct _zend_mm_free_block_canary *child[2]; |
| 406 |
} zend_mm_free_block_canary; |
| 407 |
|
| 408 |
#define ZEND_MM_NUM_BUCKETS (sizeof(size_t) << 3) |
| 409 |
|
| 410 |
#define ZEND_MM_CACHE 1 |
| 411 |
#define ZEND_MM_CACHE_SIZE (ZEND_MM_NUM_BUCKETS * 4 * 1024) |
| 412 |
|
| 413 |
#ifndef ZEND_MM_CACHE_STAT |
| 414 |
# define ZEND_MM_CACHE_STAT 0 |
| 415 |
#endif |
| 416 |
|
| 417 |
typedef struct _zend_mm_heap_canary { |
| 418 |
int use_zend_alloc; |
| 419 |
void *(*_malloc)(size_t); |
| 420 |
void (*_free)(void*); |
| 421 |
void *(*_realloc)(void*, size_t); |
| 422 |
size_t free_bitmap; |
| 423 |
size_t large_free_bitmap; |
| 424 |
size_t block_size; |
| 425 |
size_t compact_size; |
| 426 |
zend_mm_segment *segments_list; |
| 427 |
zend_mm_storage *storage; |
| 428 |
size_t real_size; |
| 429 |
size_t real_peak; |
| 430 |
size_t limit; |
| 431 |
size_t size; |
| 432 |
size_t peak; |
| 433 |
size_t reserve_size; |
| 434 |
void *reserve; |
| 435 |
int overflow; |
| 436 |
int internal; |
| 437 |
#if ZEND_MM_CACHE |
| 438 |
unsigned int cached; |
| 439 |
zend_mm_free_block_canary *cache[ZEND_MM_NUM_BUCKETS]; |
| 440 |
#endif |
| 441 |
zend_mm_free_block_canary *free_buckets[ZEND_MM_NUM_BUCKETS*2]; |
| 442 |
zend_mm_free_block_canary *large_free_buckets[ZEND_MM_NUM_BUCKETS]; |
| 443 |
zend_mm_free_block_canary *rest_buckets[2]; |
| 444 |
#if ZEND_MM_CACHE_STAT |
| 445 |
struct { |
| 446 |
int count; |
| 447 |
int max_count; |
| 448 |
int hit; |
| 449 |
int miss; |
| 450 |
} cache_stat[ZEND_MM_NUM_BUCKETS+1]; |
| 451 |
#endif |
| 452 |
#if SUHOSIN_PATCH |
| 453 |
size_t canary_1,canary_2,canary_3; |
| 454 |
#endif |
| 455 |
}; |
| 456 |
|
| 457 |
#define ZEND_MM_SMALL_FREE_BUCKET(heap, index) \ |
| 458 |
(zend_mm_free_block_canary*) ((char*)&heap->free_buckets[index * 2] + \ |
| 459 |
sizeof(zend_mm_free_block_canary*) * 2 - \ |
| 460 |
sizeof(zend_mm_small_free_block_canary)) |
| 461 |
|
| 462 |
#define ZEND_MM_REST_BUCKET(heap) \ |
| 463 |
(zend_mm_free_block_canary*)((char*)&heap->rest_buckets[0] + \ |
| 464 |
sizeof(zend_mm_free_block_canary*) * 2 - \ |
| 465 |
sizeof(zend_mm_small_free_block_canary)) |
| 466 |
|
| 467 |
#if ZEND_MM_COOKIES |
| 468 |
|
| 469 |
static unsigned int _zend_mm_cookie = 0; |
| 470 |
|
| 471 |
# define ZEND_MM_COOKIE(block) \ |
| 472 |
(((size_t)(block)) ^ _zend_mm_cookie) |
| 473 |
# define ZEND_MM_SET_COOKIE(block) \ |
| 474 |
(block)->info._cookie = ZEND_MM_COOKIE(block) |
| 475 |
# define ZEND_MM_CHECK_COOKIE(block) \ |
| 476 |
if (UNEXPECTED((block)->info._cookie != ZEND_MM_COOKIE(block))) { \ |
| 477 |
zend_mm_panic("zend_mm_heap corrupted"); \ |
| 478 |
} |
| 479 |
#else |
| 480 |
# define ZEND_MM_SET_COOKIE(block) |
| 481 |
# define ZEND_MM_CHECK_COOKIE(block) |
| 482 |
#endif |
| 483 |
|
| 484 |
/* Default memory segment size */ |
| 485 |
#define ZEND_MM_SEG_SIZE (256 * 1024) |
| 486 |
|
| 487 |
/* Reserved space for error reporting in case of memory overflow */ |
| 488 |
#define ZEND_MM_RESERVE_SIZE (8*1024) |
| 489 |
|
| 490 |
#ifdef _WIN64 |
| 491 |
# define ZEND_MM_LONG_CONST(x) (x##i64) |
| 492 |
#else |
| 493 |
# define ZEND_MM_LONG_CONST(x) (x##L) |
| 494 |
#endif |
| 495 |
|
| 496 |
#define ZEND_MM_TYPE_MASK ZEND_MM_LONG_CONST(0x3) |
| 497 |
|
| 498 |
#define ZEND_MM_FREE_BLOCK ZEND_MM_LONG_CONST(0x0) |
| 499 |
#define ZEND_MM_USED_BLOCK ZEND_MM_LONG_CONST(0x1) |
| 500 |
#define ZEND_MM_GUARD_BLOCK ZEND_MM_LONG_CONST(0x3) |
| 501 |
|
| 502 |
#define ZEND_MM_BLOCK(b, type, size) do { \ |
| 503 |
size_t _size = (size); \ |
| 504 |
(b)->info._size = (type) | _size; \ |
| 505 |
ZEND_MM_BLOCK_AT(b, _size)->info._prev = (type) | _size; \ |
| 506 |
ZEND_MM_SET_COOKIE(b); \ |
| 507 |
} while (0); |
| 508 |
#define ZEND_MM_LAST_BLOCK(b) do { \ |
| 509 |
(b)->info._size = ZEND_MM_GUARD_BLOCK | ZEND_MM_ALIGNED_HEADER_SIZE; \ |
| 510 |
ZEND_MM_SET_MAGIC(b, MEM_BLOCK_GUARD); \ |
| 511 |
} while (0); |
| 512 |
#define ZEND_MM_BLOCK_SIZE(b) ((b)->info._size & ~ZEND_MM_TYPE_MASK) |
| 513 |
#define ZEND_MM_IS_FREE_BLOCK(b) (!((b)->info._size & ZEND_MM_USED_BLOCK)) |
| 514 |
#define ZEND_MM_IS_USED_BLOCK(b) ((b)->info._size & ZEND_MM_USED_BLOCK) |
| 515 |
#define ZEND_MM_IS_GUARD_BLOCK(b) (((b)->info._size & ZEND_MM_TYPE_MASK) == ZEND_MM_GUARD_BLOCK) |
| 516 |
|
| 517 |
#define ZEND_MM_NEXT_BLOCK(b) ZEND_MM_BLOCK_AT(b, ZEND_MM_BLOCK_SIZE(b)) |
| 518 |
#define ZEND_MM_PREV_BLOCK(b) ZEND_MM_BLOCK_AT(b, -(ssize_t)((b)->info._prev & ~ZEND_MM_TYPE_MASK)) |
| 519 |
|
| 520 |
#define ZEND_MM_PREV_BLOCK_IS_FREE(b) (!((b)->info._prev & ZEND_MM_USED_BLOCK)) |
| 521 |
|
| 522 |
#define ZEND_MM_MARK_FIRST_BLOCK(b) ((b)->info._prev = ZEND_MM_GUARD_BLOCK) |
| 523 |
#define ZEND_MM_IS_FIRST_BLOCK(b) ((b)->info._prev == ZEND_MM_GUARD_BLOCK) |
| 524 |
|
| 525 |
/* optimized access */ |
| 526 |
#define ZEND_MM_FREE_BLOCK_SIZE(b) (b)->info._size |
| 527 |
|
| 528 |
#ifndef ZEND_MM_ALIGNMENT |
| 529 |
# define ZEND_MM_ALIGNMENT 8 |
| 530 |
# define ZEND_MM_ALIGNMENT_LOG2 3 |
| 531 |
#elif ZEND_MM_ALIGNMENT < 4 |
| 532 |
# undef ZEND_MM_ALIGNMENT |
| 533 |
# undef ZEND_MM_ALIGNMENT_LOG2 |
| 534 |
# define ZEND_MM_ALIGNMENT 4 |
| 535 |
# define ZEND_MM_ALIGNMENT_LOG2 2 |
| 536 |
#endif |
| 537 |
|
| 538 |
#define ZEND_MM_ALIGNMENT_MASK ~(ZEND_MM_ALIGNMENT-1) |
| 539 |
|
| 540 |
/* Aligned header size */ |
| 541 |
#define ZEND_MM_ALIGNED_SIZE(size) ((size + ZEND_MM_ALIGNMENT - 1) & ZEND_MM_ALIGNMENT_MASK) |
| 542 |
#define ZEND_MM_ALIGNED_HEADER_SIZE ZEND_MM_ALIGNED_SIZE(sizeof(zend_mm_block_canary)) |
| 543 |
#define ZEND_MM_ALIGNED_FREE_HEADER_SIZE ZEND_MM_ALIGNED_SIZE(sizeof(zend_mm_small_free_block_canary)) |
| 544 |
#define ZEND_MM_MIN_ALLOC_BLOCK_SIZE ZEND_MM_ALIGNED_SIZE(ZEND_MM_ALIGNED_HEADER_SIZE + END_MAGIC_SIZE + CANARY_SIZE) |
| 545 |
#define ZEND_MM_ALIGNED_MIN_HEADER_SIZE (ZEND_MM_MIN_ALLOC_BLOCK_SIZE>ZEND_MM_ALIGNED_FREE_HEADER_SIZE?ZEND_MM_MIN_ALLOC_BLOCK_SIZE:ZEND_MM_ALIGNED_FREE_HEADER_SIZE) |
| 546 |
#define ZEND_MM_ALIGNED_SEGMENT_SIZE ZEND_MM_ALIGNED_SIZE(sizeof(zend_mm_segment)) |
| 547 |
|
| 548 |
#define ZEND_MM_MIN_SIZE ((ZEND_MM_ALIGNED_MIN_HEADER_SIZE>(ZEND_MM_ALIGNED_HEADER_SIZE+END_MAGIC_SIZE+CANARY_SIZE))?(ZEND_MM_ALIGNED_MIN_HEADER_SIZE-(ZEND_MM_ALIGNED_HEADER_SIZE+END_MAGIC_SIZE+CANARY_SIZE)):0) |
| 549 |
|
| 550 |
#define ZEND_MM_MAX_SMALL_SIZE ((ZEND_MM_NUM_BUCKETS<<ZEND_MM_ALIGNMENT_LOG2)+ZEND_MM_ALIGNED_MIN_HEADER_SIZE) |
| 551 |
|
| 552 |
#define ZEND_MM_TRUE_SIZE(size) ((size<ZEND_MM_MIN_SIZE)?(ZEND_MM_ALIGNED_MIN_HEADER_SIZE):(ZEND_MM_ALIGNED_SIZE(size+ZEND_MM_ALIGNED_HEADER_SIZE+END_MAGIC_SIZE+CANARY_SIZE))) |
| 553 |
|
| 554 |
#define ZEND_MM_BUCKET_INDEX(true_size) ((true_size>>ZEND_MM_ALIGNMENT_LOG2)-(ZEND_MM_ALIGNED_MIN_HEADER_SIZE>>ZEND_MM_ALIGNMENT_LOG2)) |
| 555 |
|
| 556 |
#define ZEND_MM_SMALL_SIZE(true_size) (true_size < ZEND_MM_MAX_SMALL_SIZE) |
| 557 |
|
| 558 |
/* Memory calculations */ |
| 559 |
#define ZEND_MM_BLOCK_AT(blk, offset) ((zend_mm_block_canary *) (((char *) (blk))+(offset))) |
| 560 |
#define ZEND_MM_DATA_OF(p) ((void *) (((char *) (p))+ZEND_MM_ALIGNED_HEADER_SIZE)) |
| 561 |
#define ZEND_MM_HEADER_OF(blk) ZEND_MM_BLOCK_AT(blk, -(int)ZEND_MM_ALIGNED_HEADER_SIZE) |
| 562 |
|
| 563 |
/* Debug output */ |
| 564 |
#if ZEND_DEBUG |
| 565 |
|
| 566 |
# ifdef ZTS |
| 567 |
# define ZEND_MM_SET_THREAD_ID(block) \ |
| 568 |
((zend_mm_block_canary*)(block))->thread_id = tsrm_thread_id() |
| 569 |
# define ZEND_MM_BAD_THREAD_ID(block) ((block)->thread_id != tsrm_thread_id()) |
| 570 |
# else |
| 571 |
# define ZEND_MM_SET_THREAD_ID(block) |
| 572 |
# define ZEND_MM_BAD_THREAD_ID(block) 0 |
| 573 |
# endif |
| 574 |
|
| 575 |
# define ZEND_MM_VALID_PTR(block) \ |
| 576 |
zend_mm_check_ptr(heap, block, 1 ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC) |
| 577 |
|
| 578 |
# define ZEND_MM_SET_MAGIC(block, val) do { \ |
| 579 |
(block)->magic = (val); \ |
| 580 |
} while (0) |
| 581 |
|
| 582 |
# define ZEND_MM_CHECK_MAGIC(block, val) do { \ |
| 583 |
if ((block)->magic != (val)) { \ |
| 584 |
zend_mm_panic("zend_mm_heap corrupted"); \ |
| 585 |
} \ |
| 586 |
} while (0) |
| 587 |
|
| 588 |
# define ZEND_MM_SET_DEBUG_INFO(block, __size, set_valid, set_thread) do { \ |
| 589 |
((zend_mm_block_canary*)(block))->debug.filename = __zend_filename; \ |
| 590 |
((zend_mm_block_canary*)(block))->debug.lineno = __zend_lineno; \ |
| 591 |
((zend_mm_block_canary*)(block))->debug.orig_filename = __zend_orig_filename; \ |
| 592 |
((zend_mm_block_canary*)(block))->debug.orig_lineno = __zend_orig_lineno; \ |
| 593 |
ZEND_MM_SET_BLOCK_SIZE(block, __size); \ |
| 594 |
if (set_valid) { \ |
| 595 |
ZEND_MM_SET_MAGIC(block, MEM_BLOCK_VALID); \ |
| 596 |
} \ |
| 597 |
if (set_thread) { \ |
| 598 |
ZEND_MM_SET_THREAD_ID(block); \ |
| 599 |
} \ |
| 600 |
} while (0) |
| 601 |
|
| 602 |
#else |
| 603 |
|
| 604 |
# define ZEND_MM_VALID_PTR(ptr) EXPECTED(ptr != NULL) |
| 605 |
|
| 606 |
# define ZEND_MM_SET_MAGIC(block, val) |
| 607 |
|
| 608 |
# define ZEND_MM_CHECK_MAGIC(block, val) |
| 609 |
|
| 610 |
# define ZEND_MM_SET_DEBUG_INFO(block, __size, set_valid, set_thread) ZEND_MM_SET_BLOCK_SIZE(block, __size) |
| 611 |
|
| 612 |
#endif |
| 613 |
|
| 614 |
#if SUHOSIN_MM_WITH_CANARY_PROTECTION |
| 615 |
|
| 616 |
# define SUHOSIN_MM_CHECK_CANARIES(block, MFUNCTION) do { \ |
| 617 |
char *p = SUHOSIN_MM_END_CANARY_PTR(block); size_t check; \ |
| 618 |
if (((block)->info.canary_1 != heap->canary_1) || ((block)->info.canary_2 != heap->canary_2)) { \ |
| 619 |
canary_mismatch: \ |
| 620 |
zend_suhosin_log(S_MEMORY, "canary mismatch on " MFUNCTION " - heap overflow detected at %p", (block)); \ |
| 621 |
if (SUHOSIN_CONFIG(SUHOSIN_MM_IGNORE_CANARY_VIOLATION) == 0) { _exit(1); } else { (block)->info.canary_1 = heap->canary_1; (block)->info.canary_2 = heap->canary_2; }\ |
| 622 |
} \ |
| 623 |
memcpy(&check, p, CANARY_SIZE); \ |
| 624 |
if (check != heap->canary_3) { \ |
| 625 |
zend_suhosin_log(S_MEMORY, "end canary mismatch on " MFUNCTION " - heap overflow detected at %p", (block)); \ |
| 626 |
if (SUHOSIN_CONFIG(SUHOSIN_MM_IGNORE_CANARY_VIOLATION) == 0) { _exit(1); } else { memcpy(p, heap->canary_3, CANARY_SIZE); } \ |
| 627 |
} \ |
| 628 |
} while (0) |
| 629 |
|
| 630 |
# define SUHOSIN_MM_SET_CANARIES(block) do { \ |
| 631 |
(block)->info.canary_1 = heap->canary_1; \ |
| 632 |
(block)->info.canary_2 = heap->canary_2; \ |
| 633 |
} while (0) |
| 634 |
|
| 635 |
# define SUHOSIN_MM_END_CANARY_PTR(block) \ |
| 636 |
(char *)(((char*)(ZEND_MM_DATA_OF(block))) + ((zend_mm_block_canary*)(block))->info.size + END_MAGIC_SIZE) |
| 637 |
|
| 638 |
# define SUHOSIN_MM_SET_END_CANARY(block) do { \ |
| 639 |
char *p = SUHOSIN_MM_END_CANARY_PTR(block); \ |
| 640 |
memcpy(p, &heap->canary_3, CANARY_SIZE); \ |
| 641 |
} while (0) |
| 642 |
|
| 643 |
#else |
| 644 |
|
| 645 |
# define SUHOSIN_MM_CHECK_CANARIES(block, MFUNCTION) |
| 646 |
# define SUHOSIN_MM_SET_CANARIES(block) |
| 647 |
# define SUHOSIN_MM_END_CANARY_PTR(block) |
| 648 |
# define SUHOSIN_MM_SET_END_CANARY(block) |
| 649 |
|
| 650 |
#endif |
| 651 |
|
| 652 |
|
| 653 |
#if ZEND_MM_HEAP_PROTECTION |
| 654 |
|
| 655 |
# define ZEND_MM_CHECK_PROTECTION(block) \ |
| 656 |
do { \ |
| 657 |
if ((block)->debug.start_magic != _mem_block_start_magic || \ |
| 658 |
memcmp(ZEND_MM_END_MAGIC_PTR(block), &_mem_block_end_magic, END_MAGIC_SIZE) != 0) { \ |
| 659 |
zend_mm_panic("zend_mm_heap corrupted"); \ |
| 660 |
} \ |
| 661 |
} while (0) |
| 662 |
|
| 663 |
# define ZEND_MM_END_MAGIC_PTR(block) \ |
| 664 |
(((char*)(ZEND_MM_DATA_OF(block))) + ((zend_mm_block_canary*)(block))->debug.size) |
| 665 |
|
| 666 |
# define END_MAGIC_SIZE sizeof(unsigned int) |
| 667 |
|
| 668 |
# define ZEND_MM_SET_BLOCK_SIZE(block, __size) do { \ |
| 669 |
char *p; \ |
| 670 |
((zend_mm_block_canary*)(block))->debug.size = (__size); \ |
| 671 |
p = ZEND_MM_END_MAGIC_PTR(block); \ |
| 672 |
((zend_mm_block_canary*)(block))->debug.start_magic = _mem_block_start_magic; \ |
| 673 |
memcpy(p, &_mem_block_end_magic, END_MAGIC_SIZE); \ |
| 674 |
} while (0) |
| 675 |
|
| 676 |
static unsigned int _mem_block_start_magic = 0; |
| 677 |
static unsigned int _mem_block_end_magic = 0; |
| 678 |
|
| 679 |
#else |
| 680 |
|
| 681 |
# if ZEND_DEBUG |
| 682 |
# define ZEND_MM_SET_BLOCK_SIZE(block, _size) \ |
| 683 |
((zend_mm_block_canary*)(block))->debug.size = (_size) |
| 684 |
# else |
| 685 |
# define ZEND_MM_SET_BLOCK_SIZE(block, _size) |
| 686 |
# endif |
| 687 |
|
| 688 |
# define ZEND_MM_CHECK_PROTECTION(block) |
| 689 |
|
| 690 |
# define END_MAGIC_SIZE 0 |
| 691 |
|
| 692 |
#endif |
| 693 |
|
| 694 |
#if ZEND_MM_SAFE_UNLINKING |
| 695 |
# define ZEND_MM_CHECK_BLOCK_LINKAGE(block) \ |
| 696 |
if (UNEXPECTED((block)->info._size != ZEND_MM_BLOCK_AT(block, ZEND_MM_FREE_BLOCK_SIZE(block))->info._prev) || \ |
| 697 |
UNEXPECTED(!UNEXPECTED(ZEND_MM_IS_FIRST_BLOCK(block)) && \ |
| 698 |
UNEXPECTED(ZEND_MM_PREV_BLOCK(block)->info._size != (block)->info._prev))) { \ |
| 699 |
zend_mm_panic("zend_mm_heap corrupted"); \ |
| 700 |
} |
| 701 |
#define ZEND_MM_CHECK_TREE(block) \ |
| 702 |
if (UNEXPECTED(*((block)->parent) != (block))) { \ |
| 703 |
zend_mm_panic("zend_mm_heap corrupted"); \ |
| 704 |
} |
| 705 |
#else |
| 706 |
# define ZEND_MM_CHECK_BLOCK_LINKAGE(block) |
| 707 |
# define ZEND_MM_CHECK_TREE(block) |
| 708 |
#endif |
| 709 |
|
| 710 |
#define ZEND_MM_LARGE_BUCKET_INDEX(S) zend_mm_high_bit(S) |
| 711 |
|
| 712 |
void *_zend_mm_alloc_canary_int(zend_mm_heap_canary *heap, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC) ZEND_ATTRIBUTE_MALLOC; |
| 713 |
void _zend_mm_free_canary_int(zend_mm_heap_canary *heap, void *p ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC); |
| 714 |
void *_zend_mm_realloc_canary_int(zend_mm_heap_canary *heap, void *p, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC); |
| 715 |
|
| 716 |
|
| 717 |
static inline unsigned int zend_mm_high_bit(size_t _size) |
| 718 |
{ |
| 719 |
#if defined(__GNUC__) && defined(i386) |
| 720 |
unsigned int n; |
| 721 |
|
| 722 |
__asm__("bsrl %1,%0\n\t" : "=r" (n) : "rm" (_size)); |
| 723 |
return n; |
| 724 |
#elif defined(__GNUC__) && defined(__x86_64__) |
| 725 |
unsigned long n; |
| 726 |
|
| 727 |
__asm__("bsrq %1,%0\n\t" : "=r" (n) : "rm" (_size)); |
| 728 |
return (unsigned int)n; |
| 729 |
#elif defined(_MSC_VER) && defined(_M_IX86) |
| 730 |
__asm { |
| 731 |
bsr eax, _size |
| 732 |
} |
| 733 |
#else |
| 734 |
unsigned int n = 0; |
| 735 |
while (_size != 0) { |
| 736 |
_size = _size >> 1; |
| 737 |
n++; |
| 738 |
} |
| 739 |
return n-1; |
| 740 |
#endif |
| 741 |
} |
| 742 |
|
| 743 |
static inline unsigned int zend_mm_low_bit(size_t _size) |
| 744 |
{ |
| 745 |
#if defined(__GNUC__) && defined(i386) |
| 746 |
unsigned int n; |
| 747 |
|
| 748 |
__asm__("bsfl %1,%0\n\t" : "=r" (n) : "rm" (_size)); |
| 749 |
return n; |
| 750 |
#elif defined(__GNUC__) && defined(__x86_64__) |
| 751 |
unsigned long n; |
| 752 |
|
| 753 |
__asm__("bsfq %1,%0\n\t" : "=r" (n) : "rm" (_size)); |
| 754 |
return (unsigned int)n; |
| 755 |
#elif defined(_MSC_VER) && defined(_M_IX86) |
| 756 |
__asm { |
| 757 |
bsf eax, _size |
| 758 |
} |
| 759 |
#else |
| 760 |
static const int offset[16] = {4,0,1,0,2,0,1,0,3,0,1,0,2,0,1,0}; |
| 761 |
unsigned int n; |
| 762 |
unsigned int index = 0; |
| 763 |
|
| 764 |
n = offset[_size & 15]; |
| 765 |
while (n == 4) { |
| 766 |
_size >>= 4; |
| 767 |
index += n; |
| 768 |
n = offset[_size & 15]; |
| 769 |
} |
| 770 |
|
| 771 |
return index + n; |
| 772 |
#endif |
| 773 |
} |
| 774 |
|
| 775 |
static void zend_mm_add_to_rest_list(zend_mm_heap_canary *heap, zend_mm_free_block_canary *mm_block) |
| 776 |
{ |
| 777 |
zend_mm_free_block_canary *prev, *next; |
| 778 |
|
| 779 |
ZEND_MM_SET_MAGIC(mm_block, MEM_BLOCK_FREED); |
| 780 |
|
| 781 |
if (!ZEND_MM_SMALL_SIZE(ZEND_MM_FREE_BLOCK_SIZE(mm_block))) { |
| 782 |
mm_block->parent = NULL; |
| 783 |
} |
| 784 |
|
| 785 |
prev = SUHOSIN_MANGLE_PTR(heap->rest_buckets[0]); |
| 786 |
next = SUHOSIN_MANGLE_PTR(prev->next_free_block); |
| 787 |
mm_block->prev_free_block = SUHOSIN_MANGLE_PTR(prev); |
| 788 |
mm_block->next_free_block = SUHOSIN_MANGLE_PTR(next); |
| 789 |
prev->next_free_block = next->prev_free_block = SUHOSIN_MANGLE_PTR(mm_block); |
| 790 |
} |
| 791 |
|
| 792 |
static void zend_mm_add_to_free_list(zend_mm_heap_canary *heap, zend_mm_free_block_canary *mm_block) |
| 793 |
{ |
| 794 |
size_t size; |
| 795 |
size_t index; |
| 796 |
|
| 797 |
ZEND_MM_SET_MAGIC(mm_block, MEM_BLOCK_FREED); |
| 798 |
|
| 799 |
size = ZEND_MM_FREE_BLOCK_SIZE(mm_block); |
| 800 |
if (EXPECTED(!ZEND_MM_SMALL_SIZE(size))) { |
| 801 |
zend_mm_free_block_canary **p; |
| 802 |
|
| 803 |
index = ZEND_MM_LARGE_BUCKET_INDEX(size); |
| 804 |
p = &heap->large_free_buckets[index]; |
| 805 |
mm_block->child[0] = mm_block->child[1] = NULL; |
| 806 |
if (!*p) { |
| 807 |
*p = mm_block; |
| 808 |
mm_block->parent = p; |
| 809 |
mm_block->prev_free_block = mm_block->next_free_block = SUHOSIN_MANGLE_PTR(mm_block); |
| 810 |
heap->large_free_bitmap |= (ZEND_MM_LONG_CONST(1) << index); |
| 811 |
} else { |
| 812 |
size_t m; |
| 813 |
|
| 814 |
for (m = size << (ZEND_MM_NUM_BUCKETS - index); ; m <<= 1) { |
| 815 |
zend_mm_free_block_canary *prev = *p; |
| 816 |
|
| 817 |
if (ZEND_MM_FREE_BLOCK_SIZE(prev) != size) { |
| 818 |
p = &prev->child[(m >> (ZEND_MM_NUM_BUCKETS-1)) & 1]; |
| 819 |
if (!*p) { |
| 820 |
*p = mm_block; |
| 821 |
mm_block->parent = p; |
| 822 |
mm_block->prev_free_block = mm_block->next_free_block = SUHOSIN_MANGLE_PTR(mm_block); |
| 823 |
break; |
| 824 |
} |
| 825 |
} else { |
| 826 |
zend_mm_free_block_canary *next = SUHOSIN_MANGLE_PTR(prev->next_free_block); |
| 827 |
|
| 828 |
prev->next_free_block = next->prev_free_block = SUHOSIN_MANGLE_PTR(mm_block); |
| 829 |
mm_block->next_free_block = SUHOSIN_MANGLE_PTR(next); |
| 830 |
mm_block->prev_free_block = SUHOSIN_MANGLE_PTR(prev); |
| 831 |
mm_block->parent = NULL; |
| 832 |
break; |
| 833 |
} |
| 834 |
} |
| 835 |
} |
| 836 |
} else { |
| 837 |
zend_mm_free_block_canary *prev, *next; |
| 838 |
|
| 839 |
index = ZEND_MM_BUCKET_INDEX(size); |
| 840 |
|
| 841 |
prev = ZEND_MM_SMALL_FREE_BUCKET(heap, index); |
| 842 |
if (SUHOSIN_MANGLE_PTR(prev->prev_free_block) == prev) { |
| 843 |
heap->free_bitmap |= (ZEND_MM_LONG_CONST(1) << index); |
| 844 |
} |
| 845 |
next = SUHOSIN_MANGLE_PTR(prev->next_free_block); |
| 846 |
|
| 847 |
mm_block->prev_free_block = SUHOSIN_MANGLE_PTR(prev); |
| 848 |
mm_block->next_free_block = SUHOSIN_MANGLE_PTR(next); |
| 849 |
prev->next_free_block = next->prev_free_block = SUHOSIN_MANGLE_PTR(mm_block); |
| 850 |
} |
| 851 |
} |
| 852 |
|
| 853 |
static void zend_mm_remove_from_free_list(zend_mm_heap_canary *heap, zend_mm_free_block_canary *mm_block) |
| 854 |
{ |
| 855 |
zend_mm_free_block_canary *prev = SUHOSIN_MANGLE_PTR(mm_block->prev_free_block); |
| 856 |
zend_mm_free_block_canary *next = SUHOSIN_MANGLE_PTR(mm_block->next_free_block); |
| 857 |
|
| 858 |
ZEND_MM_CHECK_MAGIC(mm_block, MEM_BLOCK_FREED); |
| 859 |
|
| 860 |
if (EXPECTED(prev == mm_block)) { |
| 861 |
zend_mm_free_block_canary **rp, **cp; |
| 862 |
|
| 863 |
#if SUHOSIN_PATCH |
| 864 |
if (next != mm_block) { |
| 865 |
zend_suhosin_log(S_MEMORY, "zend_mm_heap corrupted at %p", mm_block); |
| 866 |
_exit(1); |
| 867 |
} |
| 868 |
#endif |
| 869 |
#if ZEND_MM_SAFE_UNLINKING |
| 870 |
if (UNEXPECTED(next != mm_block)) { |
| 871 |
zend_mm_panic("zend_mm_heap corrupted"); |
| 872 |
} |
| 873 |
#endif |
| 874 |
|
| 875 |
rp = &mm_block->child[mm_block->child[1] != NULL]; |
| 876 |
prev = *rp; |
| 877 |
if (EXPECTED(prev == NULL)) { |
| 878 |
size_t index = ZEND_MM_LARGE_BUCKET_INDEX(ZEND_MM_FREE_BLOCK_SIZE(mm_block)); |
| 879 |
|
| 880 |
ZEND_MM_CHECK_TREE(mm_block); |
| 881 |
*mm_block->parent = NULL; |
| 882 |
if (mm_block->parent == &heap->large_free_buckets[index]) { |
| 883 |
heap->large_free_bitmap &= ~(ZEND_MM_LONG_CONST(1) << index); |
| 884 |
} |
| 885 |
} else { |
| 886 |
while (*(cp = &(prev->child[prev->child[1] != NULL])) != NULL) { |
| 887 |
prev = *cp; |
| 888 |
rp = cp; |
| 889 |
} |
| 890 |
*rp = NULL; |
| 891 |
|
| 892 |
subst_block: |
| 893 |
ZEND_MM_CHECK_TREE(mm_block); |
| 894 |
*mm_block->parent = prev; |
| 895 |
prev->parent = mm_block->parent; |
| 896 |
if ((prev->child[0] = mm_block->child[0])) { |
| 897 |
ZEND_MM_CHECK_TREE(prev->child[0]); |
| 898 |
prev->child[0]->parent = &prev->child[0]; |
| 899 |
} |
| 900 |
if ((prev->child[1] = mm_block->child[1])) { |
| 901 |
ZEND_MM_CHECK_TREE(prev->child[1]); |
| 902 |
prev->child[1]->parent = &prev->child[1]; |
| 903 |
} |
| 904 |
} |
| 905 |
} else { |
| 906 |
|
| 907 |
#if SUHOSIN_PATCH |
| 908 |
if (SUHOSIN_MANGLE_PTR(prev->next_free_block) != mm_block || SUHOSIN_MANGLE_PTR(next->prev_free_block) != mm_block) { |
| 909 |
zend_suhosin_log(S_MEMORY, "zend_mm_head corrupted at %p", mm_block); |
| 910 |
_exit(1); |
| 911 |
} |
| 912 |
#endif |
| 913 |
|
| 914 |
#if ZEND_MM_SAFE_UNLINKING |
| 915 |
if (UNEXPECTED(SUHOSIN_MANGLE_PTR(prev->next_free_block) != mm_block) || UNEXPECTED(SUHOSIN_MANGLE_PTR(next->prev_free_block) != mm_block)) { |
| 916 |
zend_mm_panic("zend_mm_heap corrupted"); |
| 917 |
} |
| 918 |
#endif |
| 919 |
|
| 920 |
prev->next_free_block = SUHOSIN_MANGLE_PTR(next); |
| 921 |
next->prev_free_block = SUHOSIN_MANGLE_PTR(prev); |
| 922 |
|
| 923 |
if (EXPECTED(ZEND_MM_SMALL_SIZE(ZEND_MM_FREE_BLOCK_SIZE(mm_block)))) { |
| 924 |
if (EXPECTED(prev == next)) { |
| 925 |
size_t index = ZEND_MM_BUCKET_INDEX(ZEND_MM_FREE_BLOCK_SIZE(mm_block)); |
| 926 |
|
| 927 |
if (EXPECTED(heap->free_buckets[index*2] == heap->free_buckets[index*2+1])) { |
| 928 |
heap->free_bitmap &= ~(ZEND_MM_LONG_CONST(1) << index); |
| 929 |
} |
| 930 |
} |
| 931 |
} else if (UNEXPECTED(mm_block->parent != NULL)) { |
| 932 |
goto subst_block; |
| 933 |
} |
| 934 |
} |
| 935 |
} |
| 936 |
|
| 937 |
static void zend_mm_init(zend_mm_heap_canary *heap) |
| 938 |
{ |
| 939 |
zend_mm_free_block_canary* p; |
| 940 |
int i; |
| 941 |
|
| 942 |
heap->free_bitmap = 0; |
| 943 |
heap->large_free_bitmap = 0; |
| 944 |
#if ZEND_MM_CACHE |
| 945 |
heap->cached = 0; |
| 946 |
memset(heap->cache, 0, sizeof(heap->cache)); |
| 947 |
#endif |
| 948 |
#if ZEND_MM_CACHE_STAT |
| 949 |
for (i = 0; i < ZEND_MM_NUM_BUCKETS; i++) { |
| 950 |
heap->cache_stat[i].count = 0; |
| 951 |
} |
| 952 |
#endif |
| 953 |
p = ZEND_MM_SMALL_FREE_BUCKET(heap, 0); |
| 954 |
for (i = 0; i < ZEND_MM_NUM_BUCKETS; i++) { |
| 955 |
p->next_free_block = SUHOSIN_MANGLE_PTR(p); |
| 956 |
p->prev_free_block = SUHOSIN_MANGLE_PTR(p); |
| 957 |
p = (zend_mm_free_block_canary*)((char*)p + sizeof(zend_mm_free_block_canary*) * 2); |
| 958 |
heap->large_free_buckets[i] = NULL; |
| 959 |
} |
| 960 |
heap->rest_buckets[0] = heap->rest_buckets[1] = SUHOSIN_MANGLE_PTR(ZEND_MM_REST_BUCKET(heap)); |
| 961 |
#if SUHOSIN_PATCH |
| 962 |
if (SUHOSIN_CONFIG(SUHOSIN_MM_USE_CANARY_PROTECTION)) { |
| 963 |
zend_canary(&heap->canary_1, sizeof(heap->canary_1)); |
| 964 |
zend_canary(&heap->canary_2, sizeof(heap->canary_2)); |
| 965 |
zend_canary(&heap->canary_3, sizeof(heap->canary_3)); |
| 966 |
} |
| 967 |
#endif |
| 968 |
} |
| 969 |
|
| 970 |
static void zend_mm_del_segment(zend_mm_heap_canary *heap, zend_mm_segment *segment) |
| 971 |
{ |
| 972 |
zend_mm_segment **p = &heap->segments_list; |
| 973 |
|
| 974 |
while (*p != segment) { |
| 975 |
p = &(*p)->next_segment; |
| 976 |
} |
| 977 |
*p = segment->next_segment; |
| 978 |
heap->real_size -= segment->size; |
| 979 |
ZEND_MM_STORAGE_FREE(segment); |
| 980 |
} |
| 981 |
|
| 982 |
#if ZEND_MM_CACHE |
| 983 |
static void zend_mm_free_cache(zend_mm_heap_canary *heap) |
| 984 |
{ |
| 985 |
int i; |
| 986 |
|
| 987 |
for (i = 0; i < ZEND_MM_NUM_BUCKETS; i++) { |
| 988 |
/* SUHOSIN_MANGLE_PTR should NOT affect NULL pointers */ |
| 989 |
if (heap->cache[i]) { |
| 990 |
zend_mm_free_block_canary *mm_block = SUHOSIN_MANGLE_PTR(heap->cache[i]); |
| 991 |
|
| 992 |
while (mm_block) { |
| 993 |
size_t size = ZEND_MM_BLOCK_SIZE(mm_block); |
| 994 |
zend_mm_free_block_canary *q = SUHOSIN_MANGLE_PTR(mm_block->prev_free_block); |
| 995 |
zend_mm_block_canary *next_block = ZEND_MM_NEXT_BLOCK(mm_block); |
| 996 |
|
| 997 |
heap->cached -= size; |
| 998 |
|
| 999 |
if (ZEND_MM_PREV_BLOCK_IS_FREE(mm_block)) { |
| 1000 |
mm_block = (zend_mm_free_block_canary*)ZEND_MM_PREV_BLOCK(mm_block); |
| 1001 |
size += ZEND_MM_FREE_BLOCK_SIZE(mm_block); |
| 1002 |
zend_mm_remove_from_free_list(heap, (zend_mm_free_block_canary *) mm_block); |
| 1003 |
} |
| 1004 |
if (ZEND_MM_IS_FREE_BLOCK(next_block)) { |
| 1005 |
size += ZEND_MM_FREE_BLOCK_SIZE(next_block); |
| 1006 |
zend_mm_remove_from_free_list(heap, (zend_mm_free_block_canary *) next_block); |
| 1007 |
} |
| 1008 |
ZEND_MM_BLOCK(mm_block, ZEND_MM_FREE_BLOCK, size); |
| 1009 |
|
| 1010 |
if (ZEND_MM_IS_FIRST_BLOCK(mm_block) && |
| 1011 |
ZEND_MM_IS_GUARD_BLOCK(ZEND_MM_NEXT_BLOCK(mm_block))) { |
| 1012 |
zend_mm_del_segment(heap, (zend_mm_segment *) ((char *)mm_block - ZEND_MM_ALIGNED_SEGMENT_SIZE)); |
| 1013 |
} else { |
| 1014 |
zend_mm_add_to_free_list(heap, (zend_mm_free_block_canary *) mm_block); |
| 1015 |
} |
| 1016 |
|
| 1017 |
mm_block = q; |
| 1018 |
} |
| 1019 |
heap->cache[i] = NULL; |
| 1020 |
#if ZEND_MM_CACHE_STAT |
| 1021 |
heap->cache_stat[i].count = 0; |
| 1022 |
#endif |
| 1023 |
} |
| 1024 |
} |
| 1025 |
} |
| 1026 |
#endif |
| 1027 |
|
| 1028 |
#if ZEND_MM_HEAP_PROTECTION || ZEND_MM_COOKIES |
| 1029 |
static void zend_mm_random(unsigned char *buf, size_t size) /* {{{ */ |
| 1030 |
{ |
| 1031 |
size_t i = 0; |
| 1032 |
unsigned char t; |
| 1033 |
|
| 1034 |
#ifdef ZEND_WIN32 |
| 1035 |
HCRYPTPROV hCryptProv; |
| 1036 |
int has_context = 0; |
| 1037 |
|
| 1038 |
if (!CryptAcquireContext(&hCryptProv, NULL, NULL, PROV_RSA_FULL, 0)) { |
| 1039 |
/* Could mean that the key container does not exist, let try |
| 1040 |
again by asking for a new one */ |
| 1041 |
if (GetLastError() == NTE_BAD_KEYSET) { |
| 1042 |
if (CryptAcquireContext(&hCryptProv, NULL, NULL, PROV_RSA_FULL, CRYPT_NEWKEYSET)) { |
| 1043 |
has_context = 1; |
| 1044 |
} |
| 1045 |
} |
| 1046 |
} else { |
| 1047 |
has_context = 1; |
| 1048 |
} |
| 1049 |
if (has_context) { |
| 1050 |
do { |
| 1051 |
BOOL ret = CryptGenRandom(hCryptProv, size, buf); |
| 1052 |
CryptReleaseContext(hCryptProv, 0); |
| 1053 |
if (ret) { |
| 1054 |
while (i < size && buf[i] != 0) { |
| 1055 |
i++; |
| 1056 |
} |
| 1057 |
if (i == size) { |
| 1058 |
return; |
| 1059 |
} |
| 1060 |
} |
| 1061 |
} while (0); |
| 1062 |
} |
| 1063 |
#elif defined(HAVE_DEV_URANDOM) |
| 1064 |
int fd = open("/dev/urandom", 0); |
| 1065 |
|
| 1066 |
if (fd >= 0) { |
| 1067 |
if (read(fd, buf, size) == size) { |
| 1068 |
while (i < size && buf[i] != 0) { |
| 1069 |
i++; |
| 1070 |
} |
| 1071 |
if (i == size) { |
| 1072 |
close(fd); |
| 1073 |
return; |
| 1074 |
} |
| 1075 |
} |
| 1076 |
close(fd); |
| 1077 |
} |
| 1078 |
#endif |
| 1079 |
t = (unsigned char)getpid(); |
| 1080 |
while (i < size) { |
| 1081 |
do { |
| 1082 |
buf[i] = ((unsigned char)rand()) ^ t; |
| 1083 |
} while (buf[i] == 0); |
| 1084 |
t = buf[i++] << 1; |
| 1085 |
} |
| 1086 |
} |
| 1087 |
/* }}} */ |
| 1088 |
#endif |
| 1089 |
|
| 1090 |
|
| 1091 |
/* Notes: |
| 1092 |
* - This function may alter the block_sizes values to match platform alignment |
| 1093 |
* - This function does *not* perform sanity checks on the arguments |
| 1094 |
*/ |
| 1095 |
zend_mm_heap_canary *__zend_mm_startup_canary_ex(const zend_mm_mem_handlers *handlers, size_t block_size, size_t reserve_size, int internal, void *params) |
| 1096 |
{ |
| 1097 |
zend_mm_storage *storage; |
| 1098 |
zend_mm_heap_canary *heap; |
| 1099 |
zend_mm_free_block_canary *tmp; |
| 1100 |
|
| 1101 |
#if 0 |
| 1102 |
int i; |
| 1103 |
|
| 1104 |
printf("ZEND_MM_ALIGNMENT=%d\n", ZEND_MM_ALIGNMENT); |
| 1105 |
printf("ZEND_MM_ALIGNMENT_LOG2=%d\n", ZEND_MM_ALIGNMENT_LOG2); |
| 1106 |
printf("ZEND_MM_MIN_SIZE=%d\n", ZEND_MM_MIN_SIZE); |
| 1107 |
printf("ZEND_MM_MAX_SMALL_SIZE=%d\n", ZEND_MM_MAX_SMALL_SIZE); |
| 1108 |
printf("ZEND_MM_ALIGNED_HEADER_SIZE=%d\n", ZEND_MM_ALIGNED_HEADER_SIZE); |
| 1109 |
printf("ZEND_MM_ALIGNED_FREE_HEADER_SIZE=%d\n", ZEND_MM_ALIGNED_FREE_HEADER_SIZE); |
| 1110 |
printf("ZEND_MM_MIN_ALLOC_BLOCK_SIZE=%d\n", ZEND_MM_MIN_ALLOC_BLOCK_SIZE); |
| 1111 |
printf("ZEND_MM_ALIGNED_MIN_HEADER_SIZE=%d\n", ZEND_MM_ALIGNED_MIN_HEADER_SIZE); |
| 1112 |
printf("ZEND_MM_ALIGNED_SEGMENT_SIZE=%d\n", ZEND_MM_ALIGNED_SEGMENT_SIZE); |
| 1113 |
for (i = 0; i < ZEND_MM_MAX_SMALL_SIZE; i++) { |
| 1114 |
printf("%3d%c: %3ld %d %2ld\n", i, (i == ZEND_MM_MIN_SIZE?'*':' '), (long)ZEND_MM_TRUE_SIZE(i), ZEND_MM_SMALL_SIZE(ZEND_MM_TRUE_SIZE(i)), (long)ZEND_MM_BUCKET_INDEX(ZEND_MM_TRUE_SIZE(i))); |
| 1115 |
} |
| 1116 |
exit(0); |
| 1117 |
#endif |
| 1118 |
|
| 1119 |
#if ZEND_MM_HEAP_PROTECTION |
| 1120 |
if (_mem_block_start_magic == 0) { |
| 1121 |
zend_mm_random((unsigned char*)&_mem_block_start_magic, sizeof(_mem_block_start_magic)); |
| 1122 |
} |
| 1123 |
if (_mem_block_end_magic == 0) { |
| 1124 |
zend_mm_random((unsigned char*)&_mem_block_end_magic, sizeof(_mem_block_end_magic)); |
| 1125 |
} |
| 1126 |
#endif |
| 1127 |
#if ZEND_MM_COOKIES |
| 1128 |
if (_zend_mm_cookie == 0) { |
| 1129 |
zend_mm_random((unsigned char*)&_zend_mm_cookie, sizeof(_zend_mm_cookie)); |
| 1130 |
} |
| 1131 |
#endif |
| 1132 |
|
| 1133 |
/* get the pointer guardian and ensure low 3 bits are 1 */ |
| 1134 |
if (SUHOSIN_POINTER_GUARD == 0) { |
| 1135 |
zend_canary(&SUHOSIN_POINTER_GUARD, sizeof(SUHOSIN_POINTER_GUARD)); |
| 1136 |
SUHOSIN_POINTER_GUARD |= 7; |
| 1137 |
} |
| 1138 |
|
| 1139 |
if (zend_mm_low_bit(block_size) != zend_mm_high_bit(block_size)) { |
| 1140 |
fprintf(stderr, "'block_size' must be a power of two\n"); |
| 1141 |
/* See http://support.microsoft.com/kb/190351 */ |
| 1142 |
#ifdef PHP_WIN32 |
| 1143 |
fflush(stderr); |
| 1144 |
#endif |
| 1145 |
exit(255); |
| 1146 |
} |
| 1147 |
storage = handlers->init(params); |
| 1148 |
if (!storage) { |
| 1149 |
fprintf(stderr, "Cannot initialize zend_mm storage [%s]\n", handlers->name); |
| 1150 |
/* See http://support.microsoft.com/kb/190351 */ |
| 1151 |
#ifdef PHP_WIN32 |
| 1152 |
fflush(stderr); |
| 1153 |
#endif |
| 1154 |
exit(255); |
| 1155 |
} |
| 1156 |
storage->handlers = handlers; |
| 1157 |
|
| 1158 |
heap = malloc(sizeof(struct _zend_mm_heap_canary)); |
| 1159 |
if (heap == NULL) { |
| 1160 |
fprintf(stderr, "Cannot allocate heap for zend_mm storage [%s]\n", handlers->name); |
| 1161 |
#ifdef PHP_WIN32 |
| 1162 |
fflush(stderr); |
| 1163 |
#endif |
| 1164 |
exit(255); |
| 1165 |
} |
| 1166 |
|
| 1167 |
heap->storage = storage; |
| 1168 |
heap->block_size = block_size; |
| 1169 |
heap->compact_size = 0; |
| 1170 |
heap->segments_list = NULL; |
| 1171 |
zend_mm_init(heap); |
| 1172 |
# if ZEND_MM_CACHE_STAT |
| 1173 |
memset(heap->cache_stat, 0, sizeof(heap->cache_stat)); |
| 1174 |
# endif |
| 1175 |
|
| 1176 |
heap->use_zend_alloc = 1; |
| 1177 |
heap->real_size = 0; |
| 1178 |
heap->overflow = 0; |
| 1179 |
heap->real_peak = 0; |
| 1180 |
heap->limit = ZEND_MM_LONG_CONST(1)<<(ZEND_MM_NUM_BUCKETS-2); |
| 1181 |
heap->size = 0; |
| 1182 |
heap->peak = 0; |
| 1183 |
heap->internal = internal; |
| 1184 |
heap->reserve = NULL; |
| 1185 |
heap->reserve_size = reserve_size; |
| 1186 |
if (reserve_size > 0) { |
| 1187 |
heap->reserve = _zend_mm_alloc((zend_mm_heap *)heap, reserve_size ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC); |
| 1188 |
} |
| 1189 |
if (internal) { |
| 1190 |
int i; |
| 1191 |
zend_mm_free_block_canary *p, *q, *orig; |
| 1192 |
zend_mm_heap_canary *mm_heap = _zend_mm_alloc((zend_mm_heap *)heap, sizeof(zend_mm_heap_canary) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC); |
| 1193 |
|
| 1194 |
*mm_heap = *heap; |
| 1195 |
|
| 1196 |
p = ZEND_MM_SMALL_FREE_BUCKET(mm_heap, 0); |
| 1197 |
orig = ZEND_MM_SMALL_FREE_BUCKET(heap, 0); |
| 1198 |
for (i = 0; i < ZEND_MM_NUM_BUCKETS; i++) { |
| 1199 |
q = p; |
| 1200 |
while (SUHOSIN_MANGLE_PTR(q->prev_free_block) != orig) { |
| 1201 |
q = SUHOSIN_MANGLE_PTR(q->prev_free_block); |
| 1202 |
} |
| 1203 |
q->prev_free_block = SUHOSIN_MANGLE_PTR(p); |
| 1204 |
q = p; |
| 1205 |
while (SUHOSIN_MANGLE_PTR(q->next_free_block) != orig) { |
| 1206 |
q = SUHOSIN_MANGLE_PTR(q->next_free_block); |
| 1207 |
} |
| 1208 |
q->next_free_block = SUHOSIN_MANGLE_PTR(p); |
| 1209 |
p = (zend_mm_free_block_canary*)((char*)p + sizeof(zend_mm_free_block_canary*) * 2); |
| 1210 |
orig = (zend_mm_free_block_canary*)((char*)orig + sizeof(zend_mm_free_block_canary*) * 2); |
| 1211 |
if (mm_heap->large_free_buckets[i]) { |
| 1212 |
mm_heap->large_free_buckets[i]->parent = &mm_heap->large_free_buckets[i]; |
| 1213 |
} |
| 1214 |
} |
| 1215 |
mm_heap->rest_buckets[0] = mm_heap->rest_buckets[1] = SUHOSIN_MANGLE_PTR(ZEND_MM_REST_BUCKET(mm_heap)); |
| 1216 |
|
| 1217 |
free(heap); |
| 1218 |
heap = mm_heap; |
| 1219 |
} |
| 1220 |
return heap; |
| 1221 |
} |
| 1222 |
|
| 1223 |
zend_mm_heap_canary *__zend_mm_startup_canary(void) |
| 1224 |
{ |
| 1225 |
int i; |
| 1226 |
size_t seg_size; |
| 1227 |
char *mem_type = getenv("ZEND_MM_MEM_TYPE"); |
| 1228 |
char *tmp; |
| 1229 |
const zend_mm_mem_handlers *handlers; |
| 1230 |
zend_mm_heap_canary *heap; |
| 1231 |
|
| 1232 |
if (mem_type == NULL) { |
| 1233 |
i = 0; |
| 1234 |
} else { |
| 1235 |
for (i = 0; mem_handlers[i].name; i++) { |
| 1236 |
if (strcmp(mem_handlers[i].name, mem_type) == 0) { |
| 1237 |
break; |
| 1238 |
} |
| 1239 |
} |
| 1240 |
if (!mem_handlers[i].name) { |
| 1241 |
fprintf(stderr, "Wrong or unsupported zend_mm storage type '%s'\n", mem_type); |
| 1242 |
fprintf(stderr, " supported types:\n"); |
| 1243 |
/* See http://support.microsoft.com/kb/190351 */ |
| 1244 |
#ifdef PHP_WIN32 |
| 1245 |
fflush(stderr); |
| 1246 |
#endif |
| 1247 |
for (i = 0; mem_handlers[i].name; i++) { |
| 1248 |
fprintf(stderr, " '%s'\n", mem_handlers[i].name); |
| 1249 |
} |
| 1250 |
/* See http://support.microsoft.com/kb/190351 */ |
| 1251 |
#ifdef PHP_WIN32 |
| 1252 |
fflush(stderr); |
| 1253 |
#endif |
| 1254 |
exit(255); |
| 1255 |
} |
| 1256 |
} |
| 1257 |
handlers = &mem_handlers[i]; |
| 1258 |
|
| 1259 |
tmp = getenv("ZEND_MM_SEG_SIZE"); |
| 1260 |
if (tmp) { |
| 1261 |
seg_size = zend_atoi(tmp, 0); |
| 1262 |
if (zend_mm_low_bit(seg_size) != zend_mm_high_bit(seg_size)) { |
| 1263 |
fprintf(stderr, "ZEND_MM_SEG_SIZE must be a power of two\n"); |
| 1264 |
/* See http://support.microsoft.com/kb/190351 */ |
| 1265 |
#ifdef PHP_WIN32 |
| 1266 |
fflush(stderr); |
| 1267 |
#endif |
| 1268 |
exit(255); |
| 1269 |
} else if (seg_size < ZEND_MM_ALIGNED_SEGMENT_SIZE + ZEND_MM_ALIGNED_HEADER_SIZE) { |
| 1270 |
fprintf(stderr, "ZEND_MM_SEG_SIZE is too small\n"); |
| 1271 |
/* See http://support.microsoft.com/kb/190351 */ |
| 1272 |
#ifdef PHP_WIN32 |
| 1273 |
fflush(stderr); |
| 1274 |
#endif |
| 1275 |
exit(255); |
| 1276 |
} |
| 1277 |
} else { |
| 1278 |
seg_size = ZEND_MM_SEG_SIZE; |
| 1279 |
} |
| 1280 |
|
| 1281 |
heap = __zend_mm_startup_canary_ex(handlers, seg_size, ZEND_MM_RESERVE_SIZE, 0, NULL); |
| 1282 |
if (heap) { |
| 1283 |
tmp = getenv("ZEND_MM_COMPACT"); |
| 1284 |
if (tmp) { |
| 1285 |
heap->compact_size = zend_atoi(tmp, 0); |
| 1286 |
} else { |
| 1287 |
heap->compact_size = 2 * 1024 * 1024; |
| 1288 |
} |
| 1289 |
} |
| 1290 |
return heap; |
| 1291 |
} |
| 1292 |
|
| 1293 |
#if ZEND_DEBUG |
| 1294 |
static long zend_mm_find_leaks(zend_mm_segment *segment, zend_mm_block_canary *b) |
| 1295 |
{ |
| 1296 |
long leaks = 0; |
| 1297 |
zend_mm_block_canary *p, *q; |
| 1298 |
|
| 1299 |
p = ZEND_MM_NEXT_BLOCK(b); |
| 1300 |
while (1) { |
| 1301 |
if (ZEND_MM_IS_GUARD_BLOCK(p)) { |
| 1302 |
ZEND_MM_CHECK_MAGIC(p, MEM_BLOCK_GUARD); |
| 1303 |
segment = segment->next_segment; |
| 1304 |
if (!segment) { |
| 1305 |
break; |
| 1306 |
} |
| 1307 |
p = (zend_mm_block_canary *) ((char *) segment + ZEND_MM_ALIGNED_SEGMENT_SIZE); |
| 1308 |
continue; |
| 1309 |
} |
| 1310 |
q = ZEND_MM_NEXT_BLOCK(p); |
| 1311 |
if (q <= p || |
| 1312 |
(char*)q > (char*)segment + segment->size || |
| 1313 |
p->info._size != q->info._prev) { |
| 1314 |
zend_mm_panic("zend_mm_heap corrupted"); |
| 1315 |
} |
| 1316 |
if (!ZEND_MM_IS_FREE_BLOCK(p)) { |
| 1317 |
if (p->magic == MEM_BLOCK_VALID) { |
| 1318 |
if (p->debug.filename==b->debug.filename && p->debug.lineno==b->debug.lineno) { |
| 1319 |
ZEND_MM_SET_MAGIC(p, MEM_BLOCK_LEAK); |
| 1320 |
leaks++; |
| 1321 |
} |
| 1322 |
#if ZEND_MM_CACHE |
| 1323 |
} else if (p->magic == MEM_BLOCK_CACHED) { |
| 1324 |
/* skip it */ |
| 1325 |
#endif |
| 1326 |
} else if (p->magic != MEM_BLOCK_LEAK) { |
| 1327 |
zend_mm_panic("zend_mm_heap corrupted"); |
| 1328 |
} |
| 1329 |
} |
| 1330 |
p = q; |
| 1331 |
} |
| 1332 |
return leaks; |
| 1333 |
} |
| 1334 |
|
| 1335 |
static void zend_mm_check_leaks(zend_mm_heap_canary *heap TSRMLS_DC) |
| 1336 |
{ |
| 1337 |
zend_mm_segment *segment = heap->segments_list; |
| 1338 |
zend_mm_block_canary *p, *q; |
| 1339 |
zend_uint total = 0; |
| 1340 |
|
| 1341 |
if (!segment) { |
| 1342 |
return; |
| 1343 |
} |
| 1344 |
p = (zend_mm_block_canary *) ((char *) segment + ZEND_MM_ALIGNED_SEGMENT_SIZE); |
| 1345 |
while (1) { |
| 1346 |
q = ZEND_MM_NEXT_BLOCK(p); |
| 1347 |
if (q <= p || |
| 1348 |
(char*)q > (char*)segment + segment->size || |
| 1349 |
p->info._size != q->info._prev) { |
| 1350 |
zend_mm_panic("zend_mm_heap corrupted"); |
| 1351 |
} |
| 1352 |
if (!ZEND_MM_IS_FREE_BLOCK(p)) { |
| 1353 |
if (p->magic == MEM_BLOCK_VALID) { |
| 1354 |
long repeated; |
| 1355 |
zend_leak_info leak; |
| 1356 |
|
| 1357 |
ZEND_MM_SET_MAGIC(p, MEM_BLOCK_LEAK); |
| 1358 |
|
| 1359 |
leak.addr = ZEND_MM_DATA_OF(p); |
| 1360 |
leak.size = p->debug.size; |
| 1361 |
leak.filename = p->debug.filename; |
| 1362 |
leak.lineno = p->debug.lineno; |
| 1363 |
leak.orig_filename = p->debug.orig_filename; |
| 1364 |
leak.orig_lineno = p->debug.orig_lineno; |
| 1365 |
|
| 1366 |
zend_message_dispatcher(ZMSG_LOG_SCRIPT_NAME, NULL TSRMLS_CC); |
| 1367 |
zend_message_dispatcher(ZMSG_MEMORY_LEAK_DETECTED, &leak TSRMLS_CC); |
| 1368 |
repeated = zend_mm_find_leaks(segment, p); |
| 1369 |
total += 1 + repeated; |
| 1370 |
if (repeated) { |
| 1371 |
zend_message_dispatcher(ZMSG_MEMORY_LEAK_REPEATED, (void *)(zend_uintptr_t)repeated TSRMLS_CC); |
| 1372 |
} |
| 1373 |
#if ZEND_MM_CACHE |
| 1374 |
} else if (p->magic == MEM_BLOCK_CACHED) { |
| 1375 |
/* skip it */ |
| 1376 |
#endif |
| 1377 |
} else if (p->magic != MEM_BLOCK_LEAK) { |
| 1378 |
zend_mm_panic("zend_mm_heap corrupted"); |
| 1379 |
} |
| 1380 |
} |
| 1381 |
if (ZEND_MM_IS_GUARD_BLOCK(q)) { |
| 1382 |
segment = segment->next_segment; |
| 1383 |
if (!segment) { |
| 1384 |
break; |
| 1385 |
} |
| 1386 |
q = (zend_mm_block_canary *) ((char *) segment + ZEND_MM_ALIGNED_SEGMENT_SIZE); |
| 1387 |
} |
| 1388 |
p = q; |
| 1389 |
} |
| 1390 |
if (total) { |
| 1391 |
zend_message_dispatcher(ZMSG_MEMORY_LEAKS_GRAND_TOTAL, &total TSRMLS_CC); |
| 1392 |
} |
| 1393 |
} |
| 1394 |
|
| 1395 |
static int zend_mm_check_ptr(zend_mm_heap_canary *heap, void *ptr, int silent ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC) |
| 1396 |
{ |
| 1397 |
zend_mm_block_canary *p; |
| 1398 |
int no_cache_notice = 0; |
| 1399 |
int had_problems = 0; |
| 1400 |
int valid_beginning = 1; |
| 1401 |
|
| 1402 |
if (silent==2) { |
| 1403 |
silent = 1; |
| 1404 |
no_cache_notice = 1; |
| 1405 |
} else if (silent==3) { |
| 1406 |
silent = 0; |
| 1407 |
no_cache_notice = 1; |
| 1408 |
} |
| 1409 |
if (!silent) { |
| 1410 |
TSRMLS_FETCH(); |
| 1411 |
|
| 1412 |
zend_message_dispatcher(ZMSG_LOG_SCRIPT_NAME, NULL TSRMLS_CC); |
| 1413 |
zend_debug_alloc_output("---------------------------------------\n"); |
| 1414 |
zend_debug_alloc_output("%s(%d) : Block "PTR_FMT" status:\n" ZEND_FILE_LINE_RELAY_CC, ptr); |
| 1415 |
if (__zend_orig_filename) { |
| 1416 |
zend_debug_alloc_output("%s(%d) : Actual location (location was relayed)\n" ZEND_FILE_LINE_ORIG_RELAY_CC); |
| 1417 |
} |
| 1418 |
if (!ptr) { |
| 1419 |
zend_debug_alloc_output("NULL\n"); |
| 1420 |
zend_debug_alloc_output("---------------------------------------\n"); |
| 1421 |
return 0; |
| 1422 |
} |
| 1423 |
} |
| 1424 |
|
| 1425 |
if (!ptr) { |
| 1426 |
if (silent) { |
| 1427 |
return zend_mm_check_ptr(heap, ptr, 0 ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC); |
| 1428 |
} |
| 1429 |
} |
| 1430 |
|
| 1431 |
p = ZEND_MM_HEADER_OF(ptr); |
| 1432 |
|
| 1433 |
#ifdef ZTS |
| 1434 |
if (ZEND_MM_BAD_THREAD_ID(p)) { |
| 1435 |
if (!silent) { |
| 1436 |
zend_debug_alloc_output("Invalid pointer: ((thread_id=0x%0.8X) != (expected=0x%0.8X))\n", (long)p->thread_id, (long)tsrm_thread_id()); |
| 1437 |
had_problems = 1; |
| 1438 |
} else { |
| 1439 |
return zend_mm_check_ptr(heap, ptr, 0 ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC); |
| 1440 |
} |
| 1441 |
} |
| 1442 |
#endif |
| 1443 |
|
| 1444 |
if (p->info._size != ZEND_MM_NEXT_BLOCK(p)->info._prev) { |
| 1445 |
if (!silent) { |
| 1446 |
zend_debug_alloc_output("Invalid pointer: ((size="PTR_FMT") != (next.prev="PTR_FMT"))\n", p->info._size, ZEND_MM_NEXT_BLOCK(p)->info._prev); |
| 1447 |
had_problems = 1; |
| 1448 |
} else { |
| 1449 |
return zend_mm_check_ptr(heap, ptr, 0 ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC); |
| 1450 |
} |
| 1451 |
} |
| 1452 |
if (p->info._prev != ZEND_MM_GUARD_BLOCK && |
| 1453 |
ZEND_MM_PREV_BLOCK(p)->info._size != p->info._prev) { |
| 1454 |
if (!silent) { |
| 1455 |
zend_debug_alloc_output("Invalid pointer: ((prev="PTR_FMT") != (prev.size="PTR_FMT"))\n", p->info._prev, ZEND_MM_PREV_BLOCK(p)->info._size); |
| 1456 |
had_problems = 1; |
| 1457 |
} else { |
| 1458 |
return zend_mm_check_ptr(heap, ptr, 0 ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC); |
| 1459 |
} |
| 1460 |
} |
| 1461 |
|
| 1462 |
if (had_problems) { |
| 1463 |
zend_debug_alloc_output("---------------------------------------\n"); |
| 1464 |
return 0; |
| 1465 |
} |
| 1466 |
|
| 1467 |
if (!silent) { |
| 1468 |
zend_debug_alloc_output("%10s\t","Beginning: "); |
| 1469 |
} |
| 1470 |
|
| 1471 |
if (!ZEND_MM_IS_USED_BLOCK(p)) { |
| 1472 |
if (!silent) { |
| 1473 |
if (p->magic != MEM_BLOCK_FREED) { |
| 1474 |
zend_debug_alloc_output("Freed (magic=0x%0.8X, expected=0x%0.8X)\n", p->magic, MEM_BLOCK_FREED); |
| 1475 |
} else { |
| 1476 |
zend_debug_alloc_output("Freed\n"); |
| 1477 |
} |
| 1478 |
had_problems = 1; |
| 1479 |
} else { |
| 1480 |
return zend_mm_check_ptr(heap, ptr, 0 ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC); |
| 1481 |
} |
| 1482 |
} else if (ZEND_MM_IS_GUARD_BLOCK(p)) { |
| 1483 |
if (!silent) { |
| 1484 |
if (p->magic != MEM_BLOCK_FREED) { |
| 1485 |
zend_debug_alloc_output("Guard (magic=0x%0.8X, expected=0x%0.8X)\n", p->magic, MEM_BLOCK_FREED); |
| 1486 |
} else { |
| 1487 |
zend_debug_alloc_output("Guard\n"); |
| 1488 |
} |
| 1489 |
had_problems = 1; |
| 1490 |
} else { |
| 1491 |
return zend_mm_check_ptr(heap, ptr, 0 ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC); |
| 1492 |
} |
| 1493 |
} else { |
| 1494 |
switch (p->magic) { |
| 1495 |
case MEM_BLOCK_VALID: |
| 1496 |
case MEM_BLOCK_LEAK: |
| 1497 |
if (!silent) { |
| 1498 |
zend_debug_alloc_output("OK (allocated on %s:%d, %d bytes)\n", p->debug.filename, p->debug.lineno, (int)p->debug.size); |
| 1499 |
} |
| 1500 |
break; /* ok */ |
| 1501 |
case MEM_BLOCK_CACHED: |
| 1502 |
if (!no_cache_notice) { |
| 1503 |
if (!silent) { |
| 1504 |
zend_debug_alloc_output("Cached\n"); |
| 1505 |
had_problems = 1; |
| 1506 |
} else { |
| 1507 |
return zend_mm_check_ptr(heap, ptr, 0 ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC); |
| 1508 |
} |
| 1509 |
} |
| 1510 |
case MEM_BLOCK_FREED: |
| 1511 |
if (!silent) { |
| 1512 |
zend_debug_alloc_output("Freed (invalid)\n"); |
| 1513 |
had_problems = 1; |
| 1514 |
} else { |
| 1515 |
return zend_mm_check_ptr(heap, ptr, 0 ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC); |
| 1516 |
} |
| 1517 |
break; |
| 1518 |
case MEM_BLOCK_GUARD: |
| 1519 |
if (!silent) { |
| 1520 |
zend_debug_alloc_output("Guard (invalid)\n"); |
| 1521 |
had_problems = 1; |
| 1522 |
} else { |
| 1523 |
return zend_mm_check_ptr(heap, ptr, 0 ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC); |
| 1524 |
} |
| 1525 |
break; |
| 1526 |
default: |
| 1527 |
if (!silent) { |
| 1528 |
zend_debug_alloc_output("Unknown (magic=0x%0.8X, expected=0x%0.8X)\n", p->magic, MEM_BLOCK_VALID); |
| 1529 |
had_problems = 1; |
| 1530 |
valid_beginning = 0; |
| 1531 |
} else { |
| 1532 |
return zend_mm_check_ptr(heap, ptr, 0 ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC); |
| 1533 |
} |
| 1534 |
break; |
| 1535 |
} |
| 1536 |
} |
| 1537 |
|
| 1538 |
#if ZEND_MM_HEAP_PROTECTION |
| 1539 |
if (!valid_beginning) { |
| 1540 |
if (!silent) { |
| 1541 |
zend_debug_alloc_output("%10s\t", "Start:"); |
| 1542 |
zend_debug_alloc_output("Unknown\n"); |
| 1543 |
zend_debug_alloc_output("%10s\t", "End:"); |
| 1544 |
zend_debug_alloc_output("Unknown\n"); |
| 1545 |
} |
| 1546 |
} else { |
| 1547 |
char *end_magic = ZEND_MM_END_MAGIC_PTR(p); |
| 1548 |
|
| 1549 |
if (p->debug.start_magic == _mem_block_start_magic) { |
| 1550 |
if (!silent) { |
| 1551 |
zend_debug_alloc_output("%10s\t", "Start:"); |
| 1552 |
zend_debug_alloc_output("OK\n"); |
| 1553 |
} |
| 1554 |
} else { |
| 1555 |
char *overflow_ptr, *magic_ptr=(char *) &_mem_block_start_magic; |
| 1556 |
int overflows=0; |
| 1557 |
int i; |
| 1558 |
|
| 1559 |
if (silent) { |
| 1560 |
return _mem_block_check(ptr, 0 ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC); |
| 1561 |
} |
| 1562 |
had_problems = 1; |
| 1563 |
overflow_ptr = (char *) &p->debug.start_magic; |
| 1564 |
i = END_MAGIC_SIZE; |
| 1565 |
while (--i >= 0) { |
| 1566 |
if (overflow_ptr[i]!=magic_ptr[i]) { |
| 1567 |
overflows++; |
| 1568 |
} |
| 1569 |
} |
| 1570 |
zend_debug_alloc_output("%10s\t", "Start:"); |
| 1571 |
zend_debug_alloc_output("Overflown (magic=0x%0.8X instead of 0x%0.8X)\n", p->debug.start_magic, _mem_block_start_magic); |
| 1572 |
zend_debug_alloc_output("%10s\t",""); |
| 1573 |
if (overflows >= END_MAGIC_SIZE) { |
| 1574 |
zend_debug_alloc_output("At least %d bytes overflown\n", END_MAGIC_SIZE); |
| 1575 |
} else { |
| 1576 |
zend_debug_alloc_output("%d byte(s) overflown\n", overflows); |
| 1577 |
} |
| 1578 |
} |
| 1579 |
if (memcmp(end_magic, &_mem_block_end_magic, END_MAGIC_SIZE)==0) { |
| 1580 |
if (!silent) { |
| 1581 |
zend_debug_alloc_output("%10s\t", "End:"); |
| 1582 |
zend_debug_alloc_output("OK\n"); |
| 1583 |
} |
| 1584 |
} else { |
| 1585 |
char *overflow_ptr, *magic_ptr=(char *) &_mem_block_end_magic; |
| 1586 |
int overflows=0; |
| 1587 |
int i; |
| 1588 |
|
| 1589 |
if (silent) { |
| 1590 |
return _mem_block_check(ptr, 0 ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC); |
| 1591 |
} |
| 1592 |
had_problems = 1; |
| 1593 |
overflow_ptr = (char *) end_magic; |
| 1594 |
|
| 1595 |
for (i=0; i < END_MAGIC_SIZE; i++) { |
| 1596 |
if (overflow_ptr[i]!=magic_ptr[i]) { |
| 1597 |
overflows++; |
| 1598 |
} |
| 1599 |
} |
| 1600 |
|
| 1601 |
zend_debug_alloc_output("%10s\t", "End:"); |
| 1602 |
zend_debug_alloc_output("Overflown (magic=0x%0.8X instead of 0x%0.8X)\n", *end_magic, _mem_block_end_magic); |
| 1603 |
zend_debug_alloc_output("%10s\t",""); |
| 1604 |
if (overflows >= END_MAGIC_SIZE) { |
| 1605 |
zend_debug_alloc_output("At least %d bytes overflown\n", END_MAGIC_SIZE); |
| 1606 |
} else { |
| 1607 |
zend_debug_alloc_output("%d byte(s) overflown\n", overflows); |
| 1608 |
} |
| 1609 |
} |
| 1610 |
} |
| 1611 |
#endif |
| 1612 |
|
| 1613 |
if (!silent) { |
| 1614 |
zend_debug_alloc_output("---------------------------------------\n"); |
| 1615 |
} |
| 1616 |
return ((!had_problems) ? 1 : 0); |
| 1617 |
} |
| 1618 |
|
| 1619 |
static int zend_mm_check_heap(zend_mm_heap_canary *heap, int silent ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC) |
| 1620 |
{ |
| 1621 |
zend_mm_segment *segment = heap->segments_list; |
| 1622 |
zend_mm_block_canary *p, *q; |
| 1623 |
int errors = 0; |
| 1624 |
|
| 1625 |
if (!segment) { |
| 1626 |
return 0; |
| 1627 |
} |
| 1628 |
p = (zend_mm_block_canary *) ((char *) segment + ZEND_MM_ALIGNED_SEGMENT_SIZE); |
| 1629 |
while (1) { |
| 1630 |
q = ZEND_MM_NEXT_BLOCK(p); |
| 1631 |
if (q <= p || |
| 1632 |
(char*)q > (char*)segment + segment->size || |
| 1633 |
p->info._size != q->info._prev) { |
| 1634 |
zend_mm_panic("zend_mm_heap corrupted"); |
| 1635 |
} |
| 1636 |
if (!ZEND_MM_IS_FREE_BLOCK(p)) { |
| 1637 |
if (p->magic == MEM_BLOCK_VALID || p->magic == MEM_BLOCK_LEAK) { |
| 1638 |
if (!zend_mm_check_ptr(heap, ZEND_MM_DATA_OF(p), (silent?2:3) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC)) { |
| 1639 |
errors++; |
| 1640 |
} |
| 1641 |
#if ZEND_MM_CACHE |
| 1642 |
} else if (p->magic == MEM_BLOCK_CACHED) { |
| 1643 |
/* skip it */ |
| 1644 |
#endif |
| 1645 |
} else if (p->magic != MEM_BLOCK_LEAK) { |
| 1646 |
zend_mm_panic("zend_mm_heap corrupted"); |
| 1647 |
} |
| 1648 |
} |
| 1649 |
if (ZEND_MM_IS_GUARD_BLOCK(q)) { |
| 1650 |
segment = segment->next_segment; |
| 1651 |
if (!segment) { |
| 1652 |
return errors; |
| 1653 |
} |
| 1654 |
q = (zend_mm_block_canary *) ((char *) segment + ZEND_MM_ALIGNED_SEGMENT_SIZE); |
| 1655 |
} |
| 1656 |
p = q; |
| 1657 |
} |
| 1658 |
} |
| 1659 |
#endif |
| 1660 |
|
| 1661 |
void __zend_mm_shutdown_canary(zend_mm_heap_canary *heap, int full_shutdown, int silent TSRMLS_DC) |
| 1662 |
{ |
| 1663 |
zend_mm_storage *storage; |
| 1664 |
zend_mm_segment *segment; |
| 1665 |
zend_mm_segment *prev; |
| 1666 |
int internal; |
| 1667 |
|
| 1668 |
if (heap->reserve) { |
| 1669 |
#if ZEND_DEBUG |
| 1670 |
if (!silent) { |
| 1671 |
_zend_mm_free(heap, heap->reserve ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC); |
| 1672 |
} |
| 1673 |
#endif |
| 1674 |
heap->reserve = NULL; |
| 1675 |
} |
| 1676 |
|
| 1677 |
#if ZEND_MM_CACHE_STAT |
| 1678 |
if (full_shutdown) { |
| 1679 |
FILE *f; |
| 1680 |
|
| 1681 |
f = fopen("zend_mm.log", "w"); |
| 1682 |
if (f) { |
| 1683 |
int i,j; |
| 1684 |
size_t size, true_size, min_size, max_size; |
| 1685 |
int hit = 0, miss = 0; |
| 1686 |
|
| 1687 |
fprintf(f, "\nidx min_size max_size true_size max_len hits misses\n"); |
| 1688 |
size = 0; |
| 1689 |
while (1) { |
| 1690 |
true_size = ZEND_MM_TRUE_SIZE(size); |
| 1691 |
if (ZEND_MM_SMALL_SIZE(true_size)) { |
| 1692 |
min_size = size; |
| 1693 |
i = ZEND_MM_BUCKET_INDEX(true_size); |
| 1694 |
size++; |
| 1695 |
while (1) { |
| 1696 |
true_size = ZEND_MM_TRUE_SIZE(size); |
| 1697 |
if (ZEND_MM_SMALL_SIZE(true_size)) { |
| 1698 |
j = ZEND_MM_BUCKET_INDEX(true_size); |
| 1699 |
if (j > i) { |
| 1700 |
max_size = size-1; |
| 1701 |
break; |
| 1702 |
} |
| 1703 |
} else { |
| 1704 |
max_size = size-1; |
| 1705 |
break; |
| 1706 |
} |
| 1707 |
size++; |
| 1708 |
} |
| 1709 |
hit += heap->cache_stat[i].hit; |
| 1710 |
miss += heap->cache_stat[i].miss; |
| 1711 |
fprintf(f, "%2d %8d %8d %9d %8d %8d %8d\n", i, (int)min_size, (int)max_size, ZEND_MM_TRUE_SIZE(max_size), heap->cache_stat[i].max_count, heap->cache_stat[i].hit, heap->cache_stat[i].miss); |
| 1712 |
} else { |
| 1713 |
break; |
| 1714 |
} |
| 1715 |
} |
| 1716 |
fprintf(f, " %8d %8d\n", hit, miss); |
| 1717 |
fprintf(f, " %8d %8d\n", heap->cache_stat[ZEND_MM_NUM_BUCKETS].hit, heap->cache_stat[ZEND_MM_NUM_BUCKETS].miss); |
| 1718 |
fclose(f); |
| 1719 |
} |
| 1720 |
} |
| 1721 |
#endif |
| 1722 |
|
| 1723 |
#if ZEND_DEBUG |
| 1724 |
if (!silent) { |
| 1725 |
zend_mm_check_leaks(heap TSRMLS_CC); |
| 1726 |
} |
| 1727 |
#endif |
| 1728 |
|
| 1729 |
internal = heap->internal; |
| 1730 |
storage = heap->storage; |
| 1731 |
segment = heap->segments_list; |
| 1732 |
while (segment) { |
| 1733 |
prev = segment; |
| 1734 |
segment = segment->next_segment; |
| 1735 |
ZEND_MM_STORAGE_FREE(prev); |
| 1736 |
} |
| 1737 |
if (full_shutdown) { |
| 1738 |
storage->handlers->dtor(storage); |
| 1739 |
if (!internal) { |
| 1740 |
free(heap); |
| 1741 |
} |
| 1742 |
} else { |
| 1743 |
if (heap->compact_size && |
| 1744 |
heap->real_peak > heap->compact_size) { |
| 1745 |
storage->handlers->compact(storage); |
| 1746 |
} |
| 1747 |
heap->segments_list = NULL; |
| 1748 |
zend_mm_init(heap); |
| 1749 |
heap->real_size = 0; |
| 1750 |
heap->real_peak = 0; |
| 1751 |
heap->size = 0; |
| 1752 |
heap->peak = 0; |
| 1753 |
if (heap->reserve_size) { |
| 1754 |
heap->reserve = _zend_mm_alloc((zend_mm_heap *)heap, heap->reserve_size ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC); |
| 1755 |
} |
| 1756 |
heap->overflow = 0; |
| 1757 |
} |
| 1758 |
} |
| 1759 |
|
| 1760 |
static void zend_mm_safe_error(zend_mm_heap_canary *heap, |
| 1761 |
const char *format, |
| 1762 |
size_t limit, |
| 1763 |
#if ZEND_DEBUG |
| 1764 |
const char *filename, |
| 1765 |
uint lineno, |
| 1766 |
#endif |
| 1767 |
size_t size) |
| 1768 |
{ |
| 1769 |
if (heap->reserve) { |
| 1770 |
_zend_mm_free_canary_int(heap, heap->reserve ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC); |
| 1771 |
heap->reserve = NULL; |
| 1772 |
} |
| 1773 |
if (heap->overflow == 0) { |
| 1774 |
char *error_filename; |
| 1775 |
uint error_lineno; |
| 1776 |
TSRMLS_FETCH(); |
| 1777 |
if (zend_is_compiling(TSRMLS_C)) { |
| 1778 |
error_filename = zend_get_compiled_filename(TSRMLS_C); |
| 1779 |
error_lineno = zend_get_compiled_lineno(TSRMLS_C); |
| 1780 |
} else if (EG(in_execution)) { |
| 1781 |
error_filename = EG(active_op_array)?EG(active_op_array)->filename:NULL; |
| 1782 |
error_lineno = EG(opline_ptr)?(*EG(opline_ptr))->lineno:0; |
| 1783 |
} else { |
| 1784 |
error_filename = NULL; |
| 1785 |
error_lineno = 0; |
| 1786 |
} |
| 1787 |
if (!error_filename) { |
| 1788 |
error_filename = "Unknown"; |
| 1789 |
} |
| 1790 |
heap->overflow = 1; |
| 1791 |
zend_try { |
| 1792 |
zend_error_noreturn(E_ERROR, |
| 1793 |
format, |
| 1794 |
limit, |
| 1795 |
#if ZEND_DEBUG |
| 1796 |
filename, |
| 1797 |
lineno, |
| 1798 |
#endif |
| 1799 |
size); |
| 1800 |
} zend_catch { |
| 1801 |
if (heap->overflow == 2) { |
| 1802 |
fprintf(stderr, "\nFatal error: "); |
| 1803 |
fprintf(stderr, |
| 1804 |
format, |
| 1805 |
limit, |
| 1806 |
#if ZEND_DEBUG |
| 1807 |
filename, |
| 1808 |
lineno, |
| 1809 |
#endif |
| 1810 |
size); |
| 1811 |
fprintf(stderr, " in %s on line %d\n", error_filename, error_lineno); |
| 1812 |
} |
| 1813 |
/* See http://support.microsoft.com/kb/190351 */ |
| 1814 |
#ifdef PHP_WIN32 |
| 1815 |
fflush(stderr); |
| 1816 |
#endif |
| 1817 |
} zend_end_try(); |
| 1818 |
} else { |
| 1819 |
heap->overflow = 2; |
| 1820 |
} |
| 1821 |
zend_bailout(); |
| 1822 |
} |
| 1823 |
|
| 1824 |
static zend_mm_free_block_canary *zend_mm_search_large_block(zend_mm_heap_canary *heap, size_t true_size) |
| 1825 |
{ |
| 1826 |
zend_mm_free_block_canary *best_fit; |
| 1827 |
size_t index = ZEND_MM_LARGE_BUCKET_INDEX(true_size); |
| 1828 |
size_t bitmap = heap->large_free_bitmap >> index; |
| 1829 |
zend_mm_free_block_canary *p; |
| 1830 |
|
| 1831 |
if (bitmap == 0) { |
| 1832 |
return NULL; |
| 1833 |
} |
| 1834 |
|
| 1835 |
if (UNEXPECTED((bitmap & 1) != 0)) { |
| 1836 |
/* Search for best "large" free block */ |
| 1837 |
zend_mm_free_block_canary *rst = NULL; |
| 1838 |
size_t m; |
| 1839 |
size_t best_size = -1; |
| 1840 |
|
| 1841 |
best_fit = NULL; |
| 1842 |
p = heap->large_free_buckets[index]; |
| 1843 |
for (m = true_size << (ZEND_MM_NUM_BUCKETS - index); ; m <<= 1) { |
| 1844 |
if (UNEXPECTED(ZEND_MM_FREE_BLOCK_SIZE(p) == true_size)) { |
| 1845 |
return SUHOSIN_MANGLE_PTR(p->next_free_block); |
| 1846 |
} else if (ZEND_MM_FREE_BLOCK_SIZE(p) >= true_size && |
| 1847 |
ZEND_MM_FREE_BLOCK_SIZE(p) < best_size) { |
| 1848 |
best_size = ZEND_MM_FREE_BLOCK_SIZE(p); |
| 1849 |
best_fit = p; |
| 1850 |
} |
| 1851 |
if ((m & (ZEND_MM_LONG_CONST(1) << (ZEND_MM_NUM_BUCKETS-1))) == 0) { |
| 1852 |
if (p->child[1]) { |
| 1853 |
rst = p->child[1]; |
| 1854 |
} |
| 1855 |
if (p->child[0]) { |
| 1856 |
p = p->child[0]; |
| 1857 |
} else { |
| 1858 |
break; |
| 1859 |
} |
| 1860 |
} else if (p->child[1]) { |
| 1861 |
p = p->child[1]; |
| 1862 |
} else { |
| 1863 |
break; |
| 1864 |
} |
| 1865 |
} |
| 1866 |
|
| 1867 |
for (p = rst; p; p = p->child[p->child[0] != NULL]) { |
| 1868 |
if (UNEXPECTED(ZEND_MM_FREE_BLOCK_SIZE(p) == true_size)) { |
| 1869 |
return SUHOSIN_MANGLE_PTR(p->next_free_block); |
| 1870 |
} else if (ZEND_MM_FREE_BLOCK_SIZE(p) > true_size && |
| 1871 |
ZEND_MM_FREE_BLOCK_SIZE(p) < best_size) { |
| 1872 |
best_size = ZEND_MM_FREE_BLOCK_SIZE(p); |
| 1873 |
best_fit = p; |
| 1874 |
} |
| 1875 |
} |
| 1876 |
|
| 1877 |
if (best_fit) { |
| 1878 |
return SUHOSIN_MANGLE_PTR(best_fit->next_free_block); |
| 1879 |
} |
| 1880 |
bitmap = bitmap >> 1; |
| 1881 |
if (!bitmap) { |
| 1882 |
return NULL; |
| 1883 |
} |
| 1884 |
index++; |
| 1885 |
} |
| 1886 |
|
| 1887 |
/* Search for smallest "large" free block */ |
| 1888 |
best_fit = p = heap->large_free_buckets[index + zend_mm_low_bit(bitmap)]; |
| 1889 |
while ((p = p->child[p->child[0] != NULL])) { |
| 1890 |
if (ZEND_MM_FREE_BLOCK_SIZE(p) < ZEND_MM_FREE_BLOCK_SIZE(best_fit)) { |
| 1891 |
best_fit = p; |
| 1892 |
} |
| 1893 |
} |
| 1894 |
return SUHOSIN_MANGLE_PTR(best_fit->next_free_block); |
| 1895 |
} |
| 1896 |
|
| 1897 |
void *_zend_mm_alloc_canary_int(zend_mm_heap_canary *heap, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC) |
| 1898 |
{ |
| 1899 |
zend_mm_free_block_canary *best_fit; |
| 1900 |
size_t true_size = ZEND_MM_TRUE_SIZE(size); |
| 1901 |
size_t block_size; |
| 1902 |
size_t remaining_size; |
| 1903 |
size_t segment_size; |
| 1904 |
zend_mm_segment *segment; |
| 1905 |
int keep_rest = 0; |
| 1906 |
|
| 1907 |
if (EXPECTED(ZEND_MM_SMALL_SIZE(true_size))) { |
| 1908 |
size_t index = ZEND_MM_BUCKET_INDEX(true_size); |
| 1909 |
size_t bitmap; |
| 1910 |
|
| 1911 |
if (UNEXPECTED(true_size < size)) { |
| 1912 |
goto out_of_memory; |
| 1913 |
} |
| 1914 |
#if ZEND_MM_CACHE |
| 1915 |
if (EXPECTED(heap->cache[index] != NULL)) { |
| 1916 |
/* Get block from cache */ |
| 1917 |
#if ZEND_MM_CACHE_STAT |
| 1918 |
heap->cache_stat[index].count--; |
| 1919 |
heap->cache_stat[index].hit++; |
| 1920 |
#endif |
| 1921 |
best_fit = SUHOSIN_MANGLE_PTR(heap->cache[index]); |
| 1922 |
heap->cache[index] = best_fit->prev_free_block; |
| 1923 |
heap->cached -= true_size; |
| 1924 |
#if SUHOSIN_PATCH |
| 1925 |
SUHOSIN_MM_SET_CANARIES(best_fit); |
| 1926 |
((zend_mm_block_canary*)best_fit)->info.size = size; |
| 1927 |
SUHOSIN_MM_SET_END_CANARY(best_fit); |
| 1928 |
#endif |
| 1929 |
ZEND_MM_CHECK_MAGIC(best_fit, MEM_BLOCK_CACHED); |
| 1930 |
ZEND_MM_SET_DEBUG_INFO(best_fit, size, 1, 0); |
| 1931 |
return ZEND_MM_DATA_OF(best_fit); |
| 1932 |
} |
| 1933 |
#if ZEND_MM_CACHE_STAT |
| 1934 |
heap->cache_stat[index].miss++; |
| 1935 |
#endif |
| 1936 |
#endif |
| 1937 |
|
| 1938 |
bitmap = heap->free_bitmap >> index; |
| 1939 |
if (bitmap) { |
| 1940 |
/* Found some "small" free block that can be used */ |
| 1941 |
index += zend_mm_low_bit(bitmap); |
| 1942 |
best_fit = SUHOSIN_MANGLE_PTR(heap->free_buckets[index*2]); |
| 1943 |
#if ZEND_MM_CACHE_STAT |
| 1944 |
heap->cache_stat[ZEND_MM_NUM_BUCKETS].hit++; |
| 1945 |
#endif |
| 1946 |
goto zend_mm_finished_searching_for_block; |
| 1947 |
} |
| 1948 |
} |
| 1949 |
|
| 1950 |
#if ZEND_MM_CACHE_STAT |
| 1951 |
heap->cache_stat[ZEND_MM_NUM_BUCKETS].miss++; |
| 1952 |
#endif |
| 1953 |
|
| 1954 |
best_fit = zend_mm_search_large_block(heap, true_size); |
| 1955 |
|
| 1956 |
if (!best_fit && heap->real_size >= heap->limit - heap->block_size) { |
| 1957 |
zend_mm_free_block_canary *p = SUHOSIN_MANGLE_PTR(heap->rest_buckets[0]); |
| 1958 |
size_t best_size = -1; |
| 1959 |
|
| 1960 |
while (p != ZEND_MM_REST_BUCKET(heap)) { |
| 1961 |
if (UNEXPECTED(ZEND_MM_FREE_BLOCK_SIZE(p) == true_size)) { |
| 1962 |
best_fit = p; |
| 1963 |
goto zend_mm_finished_searching_for_block; |
| 1964 |
} else if (ZEND_MM_FREE_BLOCK_SIZE(p) > true_size && |
| 1965 |
ZEND_MM_FREE_BLOCK_SIZE(p) < best_size) { |
| 1966 |
best_size = ZEND_MM_FREE_BLOCK_SIZE(p); |
| 1967 |
best_fit = p; |
| 1968 |
} |
| 1969 |
p = SUHOSIN_MANGLE_PTR(p->prev_free_block); |
| 1970 |
} |
| 1971 |
} |
| 1972 |
|
| 1973 |
if (!best_fit) { |
| 1974 |
if (true_size > heap->block_size - (ZEND_MM_ALIGNED_SEGMENT_SIZE + ZEND_MM_ALIGNED_HEADER_SIZE)) { |
| 1975 |
/* Make sure we add a memory block which is big enough, |
| 1976 |
segment must have header "size" and trailer "guard" block */ |
| 1977 |
segment_size = true_size + ZEND_MM_ALIGNED_SEGMENT_SIZE + ZEND_MM_ALIGNED_HEADER_SIZE; |
| 1978 |
segment_size = (segment_size + (heap->block_size-1)) & ~(heap->block_size-1); |
| 1979 |
keep_rest = 1; |
| 1980 |
} else { |
| 1981 |
segment_size = heap->block_size; |
| 1982 |
} |
| 1983 |
|
| 1984 |
HANDLE_BLOCK_INTERRUPTIONS(); |
| 1985 |
|
| 1986 |
if (segment_size < true_size || |
| 1987 |
heap->real_size + segment_size > heap->limit) { |
| 1988 |
/* Memory limit overflow */ |
| 1989 |
#if ZEND_MM_CACHE |
| 1990 |
zend_mm_free_cache(heap); |
| 1991 |
#endif |
| 1992 |
HANDLE_UNBLOCK_INTERRUPTIONS(); |
| 1993 |
#if ZEND_DEBUG |
| 1994 |
zend_mm_safe_error(heap, "Allowed memory size of %ld bytes exhausted at %s:%d (tried to allocate %lu bytes)", heap->limit, __zend_filename, __zend_lineno, size); |
| 1995 |
#else |
| 1996 |
zend_mm_safe_error(heap, "Allowed memory size of %ld bytes exhausted (tried to allocate %lu bytes)", heap->limit, size); |
| 1997 |
#endif |
| 1998 |
} |
| 1999 |
|
| 2000 |
segment = (zend_mm_segment *) ZEND_MM_STORAGE_ALLOC(segment_size); |
| 2001 |
|
| 2002 |
if (!segment) { |
| 2003 |
/* Storage manager cannot allocate memory */ |
| 2004 |
#if ZEND_MM_CACHE |
| 2005 |
zend_mm_free_cache(heap); |
| 2006 |
#endif |
| 2007 |
HANDLE_UNBLOCK_INTERRUPTIONS(); |
| 2008 |
out_of_memory: |
| 2009 |
#if ZEND_DEBUG |
| 2010 |
zend_mm_safe_error(heap, "Out of memory (allocated %ld) at %s:%d (tried to allocate %lu bytes)", heap->real_size, __zend_filename, __zend_lineno, size); |
| 2011 |
#else |
| 2012 |
zend_mm_safe_error(heap, "Out of memory (allocated %ld) (tried to allocate %lu bytes)", heap->real_size, size); |
| 2013 |
#endif |
| 2014 |
return NULL; |
| 2015 |
} |
| 2016 |
|
| 2017 |
heap->real_size += segment_size; |
| 2018 |
if (heap->real_size > heap->real_peak) { |
| 2019 |
heap->real_peak = heap->real_size; |
| 2020 |
} |
| 2021 |
|
| 2022 |
segment->size = segment_size; |
| 2023 |
segment->next_segment = heap->segments_list; |
| 2024 |
heap->segments_list = segment; |
| 2025 |
|
| 2026 |
best_fit = (zend_mm_free_block_canary *) ((char *) segment + ZEND_MM_ALIGNED_SEGMENT_SIZE); |
| 2027 |
ZEND_MM_MARK_FIRST_BLOCK(best_fit); |
| 2028 |
|
| 2029 |
block_size = segment_size - ZEND_MM_ALIGNED_SEGMENT_SIZE - ZEND_MM_ALIGNED_HEADER_SIZE; |
| 2030 |
|
| 2031 |
ZEND_MM_LAST_BLOCK(ZEND_MM_BLOCK_AT(best_fit, block_size)); |
| 2032 |
|
| 2033 |
} else { |
| 2034 |
zend_mm_finished_searching_for_block: |
| 2035 |
/* remove from free list */ |
| 2036 |
HANDLE_BLOCK_INTERRUPTIONS(); |
| 2037 |
ZEND_MM_CHECK_MAGIC(best_fit, MEM_BLOCK_FREED); |
| 2038 |
ZEND_MM_CHECK_COOKIE(best_fit); |
| 2039 |
ZEND_MM_CHECK_BLOCK_LINKAGE(best_fit); |
| 2040 |
zend_mm_remove_from_free_list(heap, best_fit); |
| 2041 |
|
| 2042 |
block_size = ZEND_MM_FREE_BLOCK_SIZE(best_fit); |
| 2043 |
} |
| 2044 |
|
| 2045 |
remaining_size = block_size - true_size; |
| 2046 |
|
| 2047 |
if (remaining_size < ZEND_MM_ALIGNED_MIN_HEADER_SIZE) { |
| 2048 |
true_size = block_size; |
| 2049 |
ZEND_MM_BLOCK(best_fit, ZEND_MM_USED_BLOCK, true_size); |
| 2050 |
} else { |
| 2051 |
zend_mm_free_block_canary *new_free_block; |
| 2052 |
|
| 2053 |
/* prepare new free block */ |
| 2054 |
ZEND_MM_BLOCK(best_fit, ZEND_MM_USED_BLOCK, true_size); |
| 2055 |
new_free_block = (zend_mm_free_block_canary *) ZEND_MM_BLOCK_AT(best_fit, true_size); |
| 2056 |
ZEND_MM_BLOCK(new_free_block, ZEND_MM_FREE_BLOCK, remaining_size); |
| 2057 |
|
| 2058 |
/* add the new free block to the free list */ |
| 2059 |
if (EXPECTED(!keep_rest)) { |
| 2060 |
zend_mm_add_to_free_list(heap, new_free_block); |
| 2061 |
} else { |
| 2062 |
zend_mm_add_to_rest_list(heap, new_free_block); |
| 2063 |
} |
| 2064 |
} |
| 2065 |
|
| 2066 |
ZEND_MM_SET_DEBUG_INFO(best_fit, size, 1, 1); |
| 2067 |
|
| 2068 |
#if SUHOSIN_PATCH |
| 2069 |
SUHOSIN_MM_SET_CANARIES(best_fit); |
| 2070 |
((zend_mm_block_canary*)best_fit)->info.size = size; |
| 2071 |
SUHOSIN_MM_SET_END_CANARY(best_fit); |
| 2072 |
#endif |
| 2073 |
|
| 2074 |
heap->size += true_size; |
| 2075 |
if (heap->peak < heap->size) { |
| 2076 |
heap->peak = heap->size; |
| 2077 |
} |
| 2078 |
|
| 2079 |
HANDLE_UNBLOCK_INTERRUPTIONS(); |
| 2080 |
return ZEND_MM_DATA_OF(best_fit); |
| 2081 |
} |
| 2082 |
|
| 2083 |
|
| 2084 |
void _zend_mm_free_canary_int(zend_mm_heap_canary *heap, void *p ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC) |
| 2085 |
{ |
| 2086 |
zend_mm_block_canary *mm_block; |
| 2087 |
zend_mm_block_canary *next_block; |
| 2088 |
size_t size; |
| 2089 |
|
| 2090 |
if (!ZEND_MM_VALID_PTR(p)) { |
| 2091 |
return; |
| 2092 |
} |
| 2093 |
|
| 2094 |
mm_block = ZEND_MM_HEADER_OF(p); |
| 2095 |
size = ZEND_MM_BLOCK_SIZE(mm_block); |
| 2096 |
#if SUHOSIN_PATCH |
| 2097 |
SUHOSIN_MM_CHECK_CANARIES(mm_block, "efree()"); |
| 2098 |
#endif |
| 2099 |
ZEND_MM_CHECK_PROTECTION(mm_block); |
| 2100 |
|
| 2101 |
#if ZEND_DEBUG || ZEND_MM_HEAP_PROTECTION |
| 2102 |
memset(ZEND_MM_DATA_OF(mm_block), 0x5a, mm_block->debug.size); |
| 2103 |
#endif |
| 2104 |
#if SUHOSIN_PATCH |
| 2105 |
if (UNEXPECTED(SUHOSIN_CONFIG(SUHOSIN_MM_DESTROY_FREE_MEMORY))) { |
| 2106 |
memset(ZEND_MM_DATA_OF(mm_block), 0x5a, mm_block->info.size); |
| 2107 |
} |
| 2108 |
#endif |
| 2109 |
#if ZEND_MM_CACHE |
| 2110 |
if (EXPECTED(ZEND_MM_SMALL_SIZE(size)) && EXPECTED(heap->cached < ZEND_MM_CACHE_SIZE)) { |
| 2111 |
size_t index = ZEND_MM_BUCKET_INDEX(size); |
| 2112 |
zend_mm_free_block_canary **cache = &heap->cache[index]; |
| 2113 |
|
| 2114 |
((zend_mm_free_block_canary*)mm_block)->prev_free_block = *cache; |
| 2115 |
*cache = (zend_mm_free_block_canary*)SUHOSIN_MANGLE_PTR(mm_block); |
| 2116 |
heap->cached += size; |
| 2117 |
ZEND_MM_SET_MAGIC(mm_block, MEM_BLOCK_CACHED); |
| 2118 |
#if ZEND_MM_CACHE_STAT |
| 2119 |
if (++heap->cache_stat[index].count > heap->cache_stat[index].max_count) { |
| 2120 |
heap->cache_stat[index].max_count = heap->cache_stat[index].count; |
| 2121 |
} |
| 2122 |
#endif |
| 2123 |
return; |
| 2124 |
} |
| 2125 |
#endif |
| 2126 |
|
| 2127 |
HANDLE_BLOCK_INTERRUPTIONS(); |
| 2128 |
|
| 2129 |
heap->size -= size; |
| 2130 |
|
| 2131 |
next_block = ZEND_MM_BLOCK_AT(mm_block, size); |
| 2132 |
if (ZEND_MM_IS_FREE_BLOCK(next_block)) { |
| 2133 |
zend_mm_remove_from_free_list(heap, (zend_mm_free_block_canary *) next_block); |
| 2134 |
size += ZEND_MM_FREE_BLOCK_SIZE(next_block); |
| 2135 |
} |
| 2136 |
if (ZEND_MM_PREV_BLOCK_IS_FREE(mm_block)) { |
| 2137 |
mm_block = ZEND_MM_PREV_BLOCK(mm_block); |
| 2138 |
zend_mm_remove_from_free_list(heap, (zend_mm_free_block_canary *) mm_block); |
| 2139 |
size += ZEND_MM_FREE_BLOCK_SIZE(mm_block); |
| 2140 |
} |
| 2141 |
if (ZEND_MM_IS_FIRST_BLOCK(mm_block) && |
| 2142 |
ZEND_MM_IS_GUARD_BLOCK(ZEND_MM_BLOCK_AT(mm_block, size))) { |
| 2143 |
zend_mm_del_segment(heap, (zend_mm_segment *) ((char *)mm_block - ZEND_MM_ALIGNED_SEGMENT_SIZE)); |
| 2144 |
} else { |
| 2145 |
ZEND_MM_BLOCK(mm_block, ZEND_MM_FREE_BLOCK, size); |
| 2146 |
zend_mm_add_to_free_list(heap, (zend_mm_free_block_canary *) mm_block); |
| 2147 |
} |
| 2148 |
HANDLE_UNBLOCK_INTERRUPTIONS(); |
| 2149 |
} |
| 2150 |
|
| 2151 |
void *_zend_mm_realloc_canary_int(zend_mm_heap_canary *heap, void *p, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC) |
| 2152 |
{ |
| 2153 |
zend_mm_block_canary *mm_block = ZEND_MM_HEADER_OF(p); |
| 2154 |
zend_mm_block_canary *next_block; |
| 2155 |
size_t true_size; |
| 2156 |
size_t orig_size; |
| 2157 |
void *ptr; |
| 2158 |
|
| 2159 |
if (UNEXPECTED(!p) || !ZEND_MM_VALID_PTR(p)) { |
| 2160 |
return _zend_mm_alloc_canary_int(heap, size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC); |
| 2161 |
} |
| 2162 |
mm_block = ZEND_MM_HEADER_OF(p); |
| 2163 |
true_size = ZEND_MM_TRUE_SIZE(size); |
| 2164 |
orig_size = ZEND_MM_BLOCK_SIZE(mm_block); |
| 2165 |
#if SUHOSIN_PATCH |
| 2166 |
SUHOSIN_MM_CHECK_CANARIES(mm_block, "erealloc()"); |
| 2167 |
#endif |
| 2168 |
ZEND_MM_CHECK_PROTECTION(mm_block); |
| 2169 |
|
| 2170 |
if (UNEXPECTED(true_size < size)) { |
| 2171 |
goto out_of_memory; |
| 2172 |
} |
| 2173 |
|
| 2174 |
if (true_size <= orig_size) { |
| 2175 |
size_t remaining_size = orig_size - true_size; |
| 2176 |
|
| 2177 |
if (remaining_size >= ZEND_MM_ALIGNED_MIN_HEADER_SIZE) { |
| 2178 |
zend_mm_free_block_canary *new_free_block; |
| 2179 |
|
| 2180 |
HANDLE_BLOCK_INTERRUPTIONS(); |
| 2181 |
next_block = ZEND_MM_BLOCK_AT(mm_block, orig_size); |
| 2182 |
if (ZEND_MM_IS_FREE_BLOCK(next_block)) { |
| 2183 |
remaining_size += ZEND_MM_FREE_BLOCK_SIZE(next_block); |
| 2184 |
zend_mm_remove_from_free_list(heap, (zend_mm_free_block_canary *) next_block); |
| 2185 |
} |
| 2186 |
|
| 2187 |
/* prepare new free block */ |
| 2188 |
ZEND_MM_BLOCK(mm_block, ZEND_MM_USED_BLOCK, true_size); |
| 2189 |
new_free_block = (zend_mm_free_block_canary *) ZEND_MM_BLOCK_AT(mm_block, true_size); |
| 2190 |
|
| 2191 |
ZEND_MM_BLOCK(new_free_block, ZEND_MM_FREE_BLOCK, remaining_size); |
| 2192 |
|
| 2193 |
/* add the new free block to the free list */ |
| 2194 |
zend_mm_add_to_free_list(heap, new_free_block); |
| 2195 |
heap->size += (true_size - orig_size); |
| 2196 |
HANDLE_UNBLOCK_INTERRUPTIONS(); |
| 2197 |
} |
| 2198 |
ZEND_MM_SET_DEBUG_INFO(mm_block, size, 0, 0); |
| 2199 |
#if SUHOSIN_PATCH |
| 2200 |
SUHOSIN_MM_SET_CANARIES(mm_block); |
| 2201 |
((zend_mm_block_canary*)mm_block)->info.size = size; |
| 2202 |
SUHOSIN_MM_SET_END_CANARY(mm_block); |
| 2203 |
#endif |
| 2204 |
return p; |
| 2205 |
} |
| 2206 |
|
| 2207 |
#if ZEND_MM_CACHE |
| 2208 |
if (ZEND_MM_SMALL_SIZE(true_size)) { |
| 2209 |
size_t index = ZEND_MM_BUCKET_INDEX(true_size); |
| 2210 |
|
| 2211 |
if (heap->cache[index] != NULL) { |
| 2212 |
zend_mm_free_block_canary *best_fit; |
| 2213 |
zend_mm_free_block_canary **cache; |
| 2214 |
|
| 2215 |
#if ZEND_MM_CACHE_STAT |
| 2216 |
heap->cache_stat[index].count--; |
| 2217 |
heap->cache_stat[index].hit++; |
| 2218 |
#endif |
| 2219 |
best_fit = SUHOSIN_MANGLE_PTR(heap->cache[index]); |
| 2220 |
heap->cache[index] = best_fit->prev_free_block; |
| 2221 |
ZEND_MM_CHECK_MAGIC(best_fit, MEM_BLOCK_CACHED); |
| 2222 |
ZEND_MM_SET_DEBUG_INFO(best_fit, size, 1, 0); |
| 2223 |
#if SUHOSIN_PATCH |
| 2224 |
SUHOSIN_MM_SET_CANARIES(best_fit); |
| 2225 |
((zend_mm_block_canary*)best_fit)->info.size = size; |
| 2226 |
SUHOSIN_MM_SET_END_CANARY(best_fit); |
| 2227 |
#endif |
| 2228 |
|
| 2229 |
ptr = ZEND_MM_DATA_OF(best_fit); |
| 2230 |
|
| 2231 |
#if ZEND_DEBUG || ZEND_MM_HEAP_PROTECTION |
| 2232 |
memcpy(ptr, p, mm_block->debug.size); |
| 2233 |
#else |
| 2234 |
memcpy(ptr, p, orig_size - ZEND_MM_ALIGNED_HEADER_SIZE - CANARY_SIZE); |
| 2235 |
#endif |
| 2236 |
|
| 2237 |
heap->cached -= true_size - orig_size; |
| 2238 |
|
| 2239 |
index = ZEND_MM_BUCKET_INDEX(orig_size); |
| 2240 |
cache = &heap->cache[index]; |
| 2241 |
|
| 2242 |
((zend_mm_free_block_canary*)mm_block)->prev_free_block = *cache; |
| 2243 |
*cache = (zend_mm_free_block_canary*)SUHOSIN_MANGLE_PTR(mm_block); |
| 2244 |
ZEND_MM_SET_MAGIC(mm_block, MEM_BLOCK_CACHED); |
| 2245 |
#if ZEND_MM_CACHE_STAT |
| 2246 |
if (++heap->cache_stat[index].count > heap->cache_stat[index].max_count) { |
| 2247 |
heap->cache_stat[index].max_count = heap->cache_stat[index].count; |
| 2248 |
} |
| 2249 |
#endif |
| 2250 |
return ptr; |
| 2251 |
} |
| 2252 |
} |
| 2253 |
#endif |
| 2254 |
|
| 2255 |
next_block = ZEND_MM_BLOCK_AT(mm_block, orig_size); |
| 2256 |
|
| 2257 |
if (ZEND_MM_IS_FREE_BLOCK(next_block)) { |
| 2258 |
ZEND_MM_CHECK_COOKIE(next_block); |
| 2259 |
ZEND_MM_CHECK_BLOCK_LINKAGE(next_block); |
| 2260 |
if (orig_size + ZEND_MM_FREE_BLOCK_SIZE(next_block) >= true_size) { |
| 2261 |
size_t block_size = orig_size + ZEND_MM_FREE_BLOCK_SIZE(next_block); |
| 2262 |
size_t remaining_size = block_size - true_size; |
| 2263 |
|
| 2264 |
HANDLE_BLOCK_INTERRUPTIONS(); |
| 2265 |
zend_mm_remove_from_free_list(heap, (zend_mm_free_block_canary *) next_block); |
| 2266 |
|
| 2267 |
if (remaining_size < ZEND_MM_ALIGNED_MIN_HEADER_SIZE) { |
| 2268 |
true_size = block_size; |
| 2269 |
ZEND_MM_BLOCK(mm_block, ZEND_MM_USED_BLOCK, true_size); |
| 2270 |
} else { |
| 2271 |
zend_mm_free_block_canary *new_free_block; |
| 2272 |
|
| 2273 |
/* prepare new free block */ |
| 2274 |
ZEND_MM_BLOCK(mm_block, ZEND_MM_USED_BLOCK, true_size); |
| 2275 |
new_free_block = (zend_mm_free_block_canary *) ZEND_MM_BLOCK_AT(mm_block, true_size); |
| 2276 |
ZEND_MM_BLOCK(new_free_block, ZEND_MM_FREE_BLOCK, remaining_size); |
| 2277 |
|
| 2278 |
/* add the new free block to the free list */ |
| 2279 |
if (ZEND_MM_IS_FIRST_BLOCK(mm_block) && |
| 2280 |
ZEND_MM_IS_GUARD_BLOCK(ZEND_MM_BLOCK_AT(new_free_block, remaining_size))) { |
| 2281 |
zend_mm_add_to_rest_list(heap, new_free_block); |
| 2282 |
} else { |
| 2283 |
zend_mm_add_to_free_list(heap, new_free_block); |
| 2284 |
} |
| 2285 |
} |
| 2286 |
ZEND_MM_SET_DEBUG_INFO(mm_block, size, 0, 0); |
| 2287 |
heap->size = heap->size + true_size - orig_size; |
| 2288 |
if (heap->peak < heap->size) { |
| 2289 |
heap->peak = heap->size; |
| 2290 |
} |
| 2291 |
HANDLE_UNBLOCK_INTERRUPTIONS(); |
| 2292 |
#if SUHOSIN_PATCH |
| 2293 |
SUHOSIN_MM_SET_CANARIES(mm_block); |
| 2294 |
((zend_mm_block_canary*)mm_block)->info.size = size; |
| 2295 |
SUHOSIN_MM_SET_END_CANARY(mm_block); |
| 2296 |
#endif |
| 2297 |
return p; |
| 2298 |
} else if (ZEND_MM_IS_FIRST_BLOCK(mm_block) && |
| 2299 |
ZEND_MM_IS_GUARD_BLOCK(ZEND_MM_BLOCK_AT(next_block, ZEND_MM_FREE_BLOCK_SIZE(next_block)))) { |
| 2300 |
HANDLE_BLOCK_INTERRUPTIONS(); |
| 2301 |
zend_mm_remove_from_free_list(heap, (zend_mm_free_block_canary *) next_block); |
| 2302 |
goto realloc_segment; |
| 2303 |
} |
| 2304 |
} else if (ZEND_MM_IS_FIRST_BLOCK(mm_block) && ZEND_MM_IS_GUARD_BLOCK(next_block)) { |
| 2305 |
zend_mm_segment *segment; |
| 2306 |
zend_mm_segment *segment_copy; |
| 2307 |
size_t segment_size; |
| 2308 |
size_t block_size; |
| 2309 |
size_t remaining_size; |
| 2310 |
|
| 2311 |
HANDLE_BLOCK_INTERRUPTIONS(); |
| 2312 |
realloc_segment: |
| 2313 |
/* segment size, size of block and size of guard block */ |
| 2314 |
if (true_size > heap->block_size - (ZEND_MM_ALIGNED_SEGMENT_SIZE + ZEND_MM_ALIGNED_HEADER_SIZE)) { |
| 2315 |
segment_size = true_size+ZEND_MM_ALIGNED_SEGMENT_SIZE+ZEND_MM_ALIGNED_HEADER_SIZE; |
| 2316 |
segment_size = (segment_size + (heap->block_size-1)) & ~(heap->block_size-1); |
| 2317 |
} else { |
| 2318 |
segment_size = heap->block_size; |
| 2319 |
} |
| 2320 |
|
| 2321 |
segment_copy = (zend_mm_segment *) ((char *)mm_block - ZEND_MM_ALIGNED_SEGMENT_SIZE); |
| 2322 |
if (segment_size < true_size || |
| 2323 |
heap->real_size + segment_size - segment_copy->size > heap->limit) { |
| 2324 |
if (ZEND_MM_IS_FREE_BLOCK(next_block)) { |
| 2325 |
zend_mm_add_to_free_list(heap, (zend_mm_free_block_canary *) next_block); |
| 2326 |
} |
| 2327 |
#if ZEND_MM_CACHE |
| 2328 |
zend_mm_free_cache(heap); |
| 2329 |
#endif |
| 2330 |
HANDLE_UNBLOCK_INTERRUPTIONS(); |
| 2331 |
#if ZEND_DEBUG |
| 2332 |
zend_mm_safe_error(heap, "Allowed memory size of %ld bytes exhausted at %s:%d (tried to allocate %ld bytes)", heap->limit, __zend_filename, __zend_lineno, size); |
| 2333 |
#else |
| 2334 |
zend_mm_safe_error(heap, "Allowed memory size of %ld bytes exhausted (tried to allocate %ld bytes)", heap->limit, size); |
| 2335 |
#endif |
| 2336 |
return NULL; |
| 2337 |
} |
| 2338 |
|
| 2339 |
segment = ZEND_MM_STORAGE_REALLOC(segment_copy, segment_size); |
| 2340 |
if (!segment) { |
| 2341 |
#if ZEND_MM_CACHE |
| 2342 |
zend_mm_free_cache(heap); |
| 2343 |
#endif |
| 2344 |
HANDLE_UNBLOCK_INTERRUPTIONS(); |
| 2345 |
out_of_memory: |
| 2346 |
#if ZEND_DEBUG |
| 2347 |
zend_mm_safe_error(heap, "Out of memory (allocated %ld) at %s:%d (tried to allocate %ld bytes)", heap->real_size, __zend_filename, __zend_lineno, size); |
| 2348 |
#else |
| 2349 |
zend_mm_safe_error(heap, "Out of memory (allocated %ld) (tried to allocate %ld bytes)", heap->real_size, size); |
| 2350 |
#endif |
| 2351 |
return NULL; |
| 2352 |
} |
| 2353 |
heap->real_size += segment_size - segment->size; |
| 2354 |
if (heap->real_size > heap->real_peak) { |
| 2355 |
heap->real_peak = heap->real_size; |
| 2356 |
} |
| 2357 |
|
| 2358 |
segment->size = segment_size; |
| 2359 |
|
| 2360 |
if (segment != segment_copy) { |
| 2361 |
zend_mm_segment **seg = &heap->segments_list; |
| 2362 |
while (*seg != segment_copy) { |
| 2363 |
seg = &(*seg)->next_segment; |
| 2364 |
} |
| 2365 |
*seg = segment; |
| 2366 |
mm_block = (zend_mm_block_canary *) ((char *) segment + ZEND_MM_ALIGNED_SEGMENT_SIZE); |
| 2367 |
ZEND_MM_MARK_FIRST_BLOCK(mm_block); |
| 2368 |
} |
| 2369 |
|
| 2370 |
block_size = segment_size - ZEND_MM_ALIGNED_SEGMENT_SIZE - ZEND_MM_ALIGNED_HEADER_SIZE; |
| 2371 |
remaining_size = block_size - true_size; |
| 2372 |
|
| 2373 |
/* setup guard block */ |
| 2374 |
ZEND_MM_LAST_BLOCK(ZEND_MM_BLOCK_AT(mm_block, block_size)); |
| 2375 |
|
| 2376 |
if (remaining_size < ZEND_MM_ALIGNED_MIN_HEADER_SIZE) { |
| 2377 |
true_size = block_size; |
| 2378 |
ZEND_MM_BLOCK(mm_block, ZEND_MM_USED_BLOCK, true_size); |
| 2379 |
} else { |
| 2380 |
zend_mm_free_block_canary *new_free_block; |
| 2381 |
|
| 2382 |
/* prepare new free block */ |
| 2383 |
ZEND_MM_BLOCK(mm_block, ZEND_MM_USED_BLOCK, true_size); |
| 2384 |
new_free_block = (zend_mm_free_block_canary *) ZEND_MM_BLOCK_AT(mm_block, true_size); |
| 2385 |
ZEND_MM_BLOCK(new_free_block, ZEND_MM_FREE_BLOCK, remaining_size); |
| 2386 |
|
| 2387 |
/* add the new free block to the free list */ |
| 2388 |
zend_mm_add_to_rest_list(heap, new_free_block); |
| 2389 |
} |
| 2390 |
|
| 2391 |
ZEND_MM_SET_DEBUG_INFO(mm_block, size, 1, 1); |
| 2392 |
|
| 2393 |
heap->size = heap->size + true_size - orig_size; |
| 2394 |
if (heap->peak < heap->size) { |
| 2395 |
heap->peak = heap->size; |
| 2396 |
} |
| 2397 |
|
| 2398 |
HANDLE_UNBLOCK_INTERRUPTIONS(); |
| 2399 |
#if SUHOSIN_PATCH |
| 2400 |
SUHOSIN_MM_SET_CANARIES(mm_block); |
| 2401 |
((zend_mm_block_canary*)mm_block)->info.size = size; |
| 2402 |
SUHOSIN_MM_SET_END_CANARY(mm_block); |
| 2403 |
#endif |
| 2404 |
return ZEND_MM_DATA_OF(mm_block); |
| 2405 |
} |
| 2406 |
|
| 2407 |
ptr = _zend_mm_alloc_canary_int(heap, size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC); |
| 2408 |
#if ZEND_DEBUG || ZEND_MM_HEAP_PROTECTION |
| 2409 |
memcpy(ptr, p, mm_block->debug.size); |
| 2410 |
#else |
| 2411 |
memcpy(ptr, p, orig_size - ZEND_MM_ALIGNED_HEADER_SIZE - CANARY_SIZE); |
| 2412 |
#endif |
| 2413 |
_zend_mm_free_canary_int(heap, p ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC); |
| 2414 |
return ptr; |
| 2415 |
} |
| 2416 |
|
| 2417 |
ZEND_API size_t _zend_mm_block_size_canary(zend_mm_heap_canary *heap, void *p ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC) |
| 2418 |
{ |
| 2419 |
zend_mm_block_canary *mm_block; |
| 2420 |
|
| 2421 |
if (!ZEND_MM_VALID_PTR(p)) { |
| 2422 |
return 0; |
| 2423 |
} |
| 2424 |
mm_block = ZEND_MM_HEADER_OF(p); |
| 2425 |
ZEND_MM_CHECK_PROTECTION(mm_block); |
| 2426 |
#if ZEND_DEBUG || ZEND_MM_HEAP_PROTECTION |
| 2427 |
return mm_block->debug.size; |
| 2428 |
#else |
| 2429 |
return ZEND_MM_BLOCK_SIZE(mm_block); |
| 2430 |
#endif |
| 2431 |
} |
| 2432 |
|
| 2433 |
#if defined(__GNUC__) && defined(i386) |
| 2434 |
|
| 2435 |
static inline size_t safe_address(size_t nmemb, size_t size, size_t offset) |
| 2436 |
{ |
| 2437 |
size_t res = nmemb; |
| 2438 |
unsigned long overflow = 0; |
| 2439 |
|
| 2440 |
__asm__ ("mull %3\n\taddl %4,%0\n\tadcl %1,%1" |
| 2441 |
: "=&a"(res), "=&d" (overflow) |
| 2442 |
: "%0"(res), |
| 2443 |
"rm"(size), |
| 2444 |
"rm"(offset)); |
| 2445 |
|
| 2446 |
if (UNEXPECTED(overflow)) { |
| 2447 |
zend_error_noreturn(E_ERROR, "Possible integer overflow in memory allocation (%zu * %zu + %zu)", nmemb, size, offset); |
| 2448 |
return 0; |
| 2449 |
} |
| 2450 |
return res; |
| 2451 |
} |
| 2452 |
|
| 2453 |
#elif defined(__GNUC__) && defined(__x86_64__) |
| 2454 |
|
| 2455 |
static inline size_t safe_address(size_t nmemb, size_t size, size_t offset) |
| 2456 |
{ |
| 2457 |
size_t res = nmemb; |
| 2458 |
unsigned long overflow = 0; |
| 2459 |
|
| 2460 |
__asm__ ("mulq %3\n\taddq %4,%0\n\tadcq %1,%1" |
| 2461 |
: "=&a"(res), "=&d" (overflow) |
| 2462 |
: "%0"(res), |
| 2463 |
"rm"(size), |
| 2464 |
"rm"(offset)); |
| 2465 |
|
| 2466 |
if (UNEXPECTED(overflow)) { |
| 2467 |
zend_error_noreturn(E_ERROR, "Possible integer overflow in memory allocation (%zu * %zu + %zu)", nmemb, size, offset); |
| 2468 |
return 0; |
| 2469 |
} |
| 2470 |
return res; |
| 2471 |
} |
| 2472 |
|
| 2473 |
#elif SIZEOF_SIZE_T == 4 && defined(HAVE_ZEND_LONG64) |
| 2474 |
|
| 2475 |
static inline size_t safe_address(size_t nmemb, size_t size, size_t offset) |
| 2476 |
{ |
| 2477 |
zend_ulong64 res = (zend_ulong64)nmemb * (zend_ulong64)size + (zend_ulong64)offset; |
| 2478 |
|
| 2479 |
if (UNEXPECTED(res > (zend_ulong64)0xFFFFFFFFL)) { |
| 2480 |
zend_error_noreturn(E_ERROR, "Possible integer overflow in memory allocation (%zu * %zu + %zu)", nmemb, size, offset); |
| 2481 |
return 0; |
| 2482 |
} |
| 2483 |
return (size_t) res; |
| 2484 |
} |
| 2485 |
|
| 2486 |
#else |
| 2487 |
|
| 2488 |
static inline size_t safe_address(size_t nmemb, size_t size, size_t offset) |
| 2489 |
{ |
| 2490 |
size_t res = nmemb * size + offset; |
| 2491 |
double _d = (double)nmemb * (double)size + (double)offset; |
| 2492 |
double _delta = (double)res - _d; |
| 2493 |
|
| 2494 |
if (UNEXPECTED((_d + _delta ) != _d)) { |
| 2495 |
zend_error_noreturn(E_ERROR, "Possible integer overflow in memory allocation (%zu * %zu + %zu)", nmemb, size, offset); |
| 2496 |
return 0; |
| 2497 |
} |
| 2498 |
return res; |
| 2499 |
} |
| 2500 |
#endif |
| 2501 |
|
| 2502 |
/* |
| 2503 |
* Local variables: |
| 2504 |
* tab-width: 4 |
| 2505 |
* c-basic-offset: 4 |
| 2506 |
* indent-tabs-mode: t |
| 2507 |
* End: |
| 2508 |
*/ |
| 2509 |
|