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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 | /* * Copyright (c) 2015 Apple Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this * file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_LICENSE_HEADER_END@ */ #ifndef __LOCKING_H #define __LOCKING_H typedef struct lock_exclaves_s { // Must match liblibc/include/libc/std/pthread.h uint32_t _Alignas(16) opaque[4]; } lock_exclave; // Exclaves always uses pthread.h to avoid alignment difference with os/lock.h #if !MALLOC_TARGET_EXCLAVES && !MALLOC_TARGET_EXCLAVES_INTROSPECTOR && __has_include(<os/lock.h>) # define MALLOC_HAS_OS_LOCK 1 # include <os/lock.h> # if __has_include(<os/lock_private.h>) # include <os/lock_private.h> # endif // __has_include(<os/lock_private.h>) # if defined(OS_UNFAIR_LOCK_INLINE) && OS_UNFAIR_LOCK_INLINE # define os_unfair_lock_lock_with_options(lock, options) \ os_unfair_lock_lock_with_options_inline(lock, options) # define os_unfair_lock_trylock(lock) \ os_unfair_lock_trylock_inline(lock) # define os_unfair_lock_unlock(lock) \ os_unfair_lock_unlock_inline(lock) # endif // defined(OS_UNFAIR_LOCK_INLINE) && OS_UNFAIR_LOCK_INLINE typedef os_unfair_lock _malloc_lock_s; # define _MALLOC_LOCK_INIT OS_UNFAIR_LOCK_INIT #elif __has_include(<pthread.h>) # define MALLOC_HAS_OS_LOCK 0 # include <pthread.h> # if MALLOC_TARGET_EXCLAVES_INTROSPECTOR typedef lock_exclave _malloc_lock_s; # define _MALLOC_LOCK_INIT (lock_exclave){0} # else _Static_assert(sizeof(lock_exclave) == sizeof(pthread_mutex_t), "lock_exclave size must match pthread_mutex_t on EC"); _Static_assert(_Alignof(lock_exclave) == _Alignof(pthread_mutex_t), "lock_exclave alignment must match pthread_mutex_t on EC"); typedef pthread_mutex_t _malloc_lock_s; # define _MALLOC_LOCK_INIT (pthread_mutex_t)PTHREAD_MUTEX_INITIALIZER # endif // MALLOC_TARGET_EXCLAVES_INTROSPECTOR #else # error "No platform locking support!" #endif // __has_include(<os/lock.h>) __attribute__((always_inline)) static inline void _malloc_lock_init(_malloc_lock_s *lock) { #if !MALLOC_TARGET_EXCLAVES_INTROSPECTOR *lock = _MALLOC_LOCK_INIT; #else malloc_zone_error(MALLOC_ABORT_ON_ERROR, false, "exclaves lock not supported"); #endif // !MALLOC_TARGET_EXCLAVES_INTROSPECTOR } MALLOC_ALWAYS_INLINE static inline void _malloc_lock_lock(_malloc_lock_s *lock) { #if !MALLOC_TARGET_EXCLAVES_INTROSPECTOR # if MALLOC_HAS_OS_LOCK # if __has_include(<os/lock_private.h>) return os_unfair_lock_lock_with_options(lock, OS_UNFAIR_LOCK_ADAPTIVE_SPIN | OS_UNFAIR_LOCK_DATA_SYNCHRONIZATION); # else return os_unfair_lock_lock(lock); # endif // __has_include(<os/lock_private.h>) # else if (pthread_mutex_lock(lock)) { malloc_zone_error(MALLOC_ABORT_ON_ERROR, false, "Failed to acquire lock %p!\n", lock); } # endif // MALLOC_HAS_OS_LOCK #else malloc_zone_error(MALLOC_ABORT_ON_ERROR, false, "exclaves lock not supported"); #endif // !MALLOC_TARGET_EXCLAVES_INTROSPECTOR } MALLOC_ALWAYS_INLINE static inline bool _malloc_lock_trylock(_malloc_lock_s *lock) { #if !MALLOC_TARGET_EXCLAVES_INTROSPECTOR # if MALLOC_HAS_OS_LOCK return os_unfair_lock_trylock(lock); # else return !pthread_mutex_trylock(lock); # endif // MALLOC_HAS_OS_LOCK #else malloc_zone_error(MALLOC_REPORT_CRASH, false, "exclaves lock not supported"); return false; #endif // !MALLOC_TARGET_EXCLAVES_INTROSPECTOR } MALLOC_ALWAYS_INLINE static inline void _malloc_lock_unlock(_malloc_lock_s *lock) { #if !MALLOC_TARGET_EXCLAVES_INTROSPECTOR # if MALLOC_HAS_OS_LOCK os_unfair_lock_unlock(lock); # else if (pthread_mutex_unlock(lock)) { malloc_zone_error(MALLOC_ABORT_ON_ERROR, false, "Failed to release lock %p!\n", lock); } # endif // MALLOC_HAS_OS_LOCK #else malloc_zone_error(MALLOC_ABORT_ON_ERROR, false, "exclaves lock not supported"); #endif // !MALLOC_TARGET_EXCLAVES_INTROSPECTOR } MALLOC_ALWAYS_INLINE static inline void _malloc_lock_assert_owner(_malloc_lock_s *lock) { #if !MALLOC_TARGET_EXCLAVES_INTROSPECTOR # if MALLOC_HAS_OS_LOCK os_unfair_lock_assert_owner(lock); # endif // MALLOC_HAS_OS_LOCK #else malloc_zone_error(MALLOC_ABORT_ON_ERROR, false, "exclaves lock not supported"); #endif // !MALLOC_TARGET_EXCLAVES_INTROSPECTOR } #endif // __LOCKING_H |