1 /* 2 +----------------------------------------------------------------------+ 3 | Zend OPcache | 4 +----------------------------------------------------------------------+ 5 | Copyright (c) 1998-2018 The PHP Group | 6 +----------------------------------------------------------------------+ 7 | This source file is subject to version 3.01 of the PHP license, | 8 | that is bundled with this package in the file LICENSE, and is | 9 | available through the world-wide-web at the following url: | 10 | http://www.php.net/license/3_01.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 | Authors: Andi Gutmans <andi@php.net> | 16 | Zeev Suraski <zeev@php.net> | 17 | Stanislav Malyshev <stas@zend.com> | 18 | Dmitry Stogov <dmitry@php.net> | 19 +----------------------------------------------------------------------+ 20 */ 21 22 #ifndef ZEND_SHARED_ALLOC_H 23 #define ZEND_SHARED_ALLOC_H 24 25 #include "zend.h" 26 #include "ZendAccelerator.h" 27 28 #if defined(__APPLE__) && defined(__MACH__) /* darwin */ 29 # ifdef HAVE_SHM_MMAP_POSIX 30 # define USE_SHM_OPEN 1 31 # endif 32 # ifdef HAVE_SHM_MMAP_ANON 33 # define USE_MMAP 1 34 # endif 35 #elif defined(__linux__) || defined(_AIX) 36 # ifdef HAVE_SHM_IPC 37 # define USE_SHM 1 38 # endif 39 # ifdef HAVE_SHM_MMAP_ANON 40 # define USE_MMAP 1 41 # endif 42 #elif defined(__sparc) || defined(__sun) 43 # ifdef HAVE_SHM_MMAP_POSIX 44 # define USE_SHM_OPEN 1 45 # endif 46 # ifdef HAVE_SHM_IPC 47 # define USE_SHM 1 48 # endif 49 # if defined(__i386) 50 # ifdef HAVE_SHM_MMAP_ANON 51 # define USE_MMAP 1 52 # endif 53 # endif 54 #else 55 # ifdef HAVE_SHM_MMAP_POSIX 56 # define USE_SHM_OPEN 1 57 # endif 58 # ifdef HAVE_SHM_MMAP_ANON 59 # define USE_MMAP 1 60 # endif 61 # ifdef HAVE_SHM_IPC 62 # define USE_SHM 1 63 # endif 64 #endif 65 66 #define ALLOC_FAILURE 0 67 #define ALLOC_SUCCESS 1 68 #define FAILED_REATTACHED 2 69 #define SUCCESSFULLY_REATTACHED 4 70 #define ALLOC_FAIL_MAPPING 8 71 #define ALLOC_FALLBACK 9 72 73 typedef struct _zend_shared_segment { 74 size_t size; 75 size_t pos; /* position for simple stack allocator */ 76 void *p; 77 } zend_shared_segment; 78 79 typedef int (*create_segments_t)(size_t requested_size, zend_shared_segment ***shared_segments, int *shared_segment_count, char **error_in); 80 typedef int (*detach_segment_t)(zend_shared_segment *shared_segment); 81 82 typedef struct { 83 create_segments_t create_segments; 84 detach_segment_t detach_segment; 85 size_t (*segment_type_size)(void); 86 } zend_shared_memory_handlers; 87 88 typedef struct _handler_entry { 89 const char *name; 90 zend_shared_memory_handlers *handler; 91 } zend_shared_memory_handler_entry; 92 93 typedef struct _zend_shared_memory_state { 94 int *positions; /* current positions for each segment */ 95 size_t shared_free; /* amount of free shared memory */ 96 } zend_shared_memory_state; 97 98 typedef struct _zend_smm_shared_globals { 99 /* Shared Memory Manager */ 100 zend_shared_segment **shared_segments; 101 /* Number of allocated shared segments */ 102 int shared_segments_count; 103 /* Amount of free shared memory */ 104 size_t shared_free; 105 /* Amount of shared memory allocated by garbage */ 106 size_t wasted_shared_memory; 107 /* No more shared memory flag */ 108 zend_bool memory_exhausted; 109 /* Saved Shared Allocator State */ 110 zend_shared_memory_state shared_memory_state; 111 /* Pointer to the application's shared data structures */ 112 void *app_shared_globals; 113 } zend_smm_shared_globals; 114 115 extern zend_smm_shared_globals *smm_shared_globals; 116 117 #define ZSMMG(element) (smm_shared_globals->element) 118 119 #define SHARED_ALLOC_REATTACHED (SUCCESS+1) 120 121 int zend_shared_alloc_startup(size_t requested_size); 122 void zend_shared_alloc_shutdown(void); 123 124 /* allocate shared memory block */ 125 void *zend_shared_alloc(size_t size); 126 127 /* copy into shared memory */ 128 void *_zend_shared_memdup(void *p, size_t size, zend_bool free_source); 129 int zend_shared_memdup_size(void *p, size_t size); 130 131 int zend_accel_in_shm(void *ptr); 132 133 typedef union _align_test { 134 void *ptr; 135 double dbl; 136 zend_long lng; 137 } align_test; 138 139 #if ZEND_GCC_VERSION >= 2000 140 # define PLATFORM_ALIGNMENT (__alignof__(align_test) < 8 ? 8 : __alignof__(align_test)) 141 #else 142 # define PLATFORM_ALIGNMENT (sizeof(align_test)) 143 #endif 144 145 #define ZEND_ALIGNED_SIZE(size) \ 146 ZEND_MM_ALIGNED_SIZE_EX(size, PLATFORM_ALIGNMENT) 147 148 /* exclusive locking */ 149 void zend_shared_alloc_lock(void); 150 void zend_shared_alloc_unlock(void); /* returns the allocated size during lock..unlock */ 151 void zend_shared_alloc_safe_unlock(void); 152 153 /* old/new mapping functions */ 154 void zend_shared_alloc_init_xlat_table(void); 155 void zend_shared_alloc_destroy_xlat_table(void); 156 void zend_shared_alloc_clear_xlat_table(void); 157 void zend_shared_alloc_register_xlat_entry(const void *old, const void *new); 158 void *zend_shared_alloc_get_xlat_entry(const void *old); 159 160 size_t zend_shared_alloc_get_free_memory(void); 161 void zend_shared_alloc_save_state(void); 162 void zend_shared_alloc_restore_state(void); 163 const char *zend_accel_get_shared_model(void); 164 165 /* memory write protection */ 166 void zend_accel_shared_protect(int mode); 167 168 #ifdef USE_MMAP 169 extern zend_shared_memory_handlers zend_alloc_mmap_handlers; 170 #endif 171 172 #ifdef USE_SHM 173 extern zend_shared_memory_handlers zend_alloc_shm_handlers; 174 #endif 175 176 #ifdef USE_SHM_OPEN 177 extern zend_shared_memory_handlers zend_alloc_posix_handlers; 178 #endif 179 180 #ifdef ZEND_WIN32 181 extern zend_shared_memory_handlers zend_alloc_win32_handlers; 182 void zend_shared_alloc_create_lock(void); 183 void zend_shared_alloc_lock_win32(void); 184 void zend_shared_alloc_unlock_win32(void); 185 #endif 186 187 #endif /* ZEND_SHARED_ALLOC_H */ 188
