1 /* include/jemalloc/internal/jemalloc_internal_defs.h. Generated from jemalloc_internal_defs.h.in by configure. */ 2 #ifndef JEMALLOC_INTERNAL_DEFS_H_ 3 #define JEMALLOC_INTERNAL_DEFS_H_ 4 /* 5 * If JEMALLOC_PREFIX is defined via --with-jemalloc-prefix, it will cause all 6 * public APIs to be prefixed. This makes it possible, with some care, to use 7 * multiple allocators simultaneously. 8 */ 9 #define JEMALLOC_PREFIX "je_" 10 #define JEMALLOC_CPREFIX "JE_" 11 12 /* 13 * JEMALLOC_PRIVATE_NAMESPACE is used as a prefix for all library-private APIs. 14 * For shared libraries, symbol visibility mechanisms prevent these symbols 15 * from being exported, but for static libraries, naming collisions are a real 16 * possibility. 17 */ 18 #define JEMALLOC_PRIVATE_NAMESPACE je_ 19 20 /* 21 * Hyper-threaded CPUs may need a special instruction inside spin loops in 22 * order to yield to another virtual CPU. 23 */ 24 #ifdef __x86_64__ 25 #define CPU_SPINWAIT __asm__ volatile("pause") 26 #else 27 #define CPU_SPINWAIT 28 #endif 29 30 /* Defined if the equivalent of FreeBSD's atomic(9) functions are available. */ 31 /* #undef JEMALLOC_ATOMIC9 */ 32 33 /* 34 * Defined if OSAtomic*() functions are available, as provided by Darwin, and 35 * documented in the atomic(3) manual page. 36 */ 37 /* #undef JEMALLOC_OSATOMIC */ 38 39 /* 40 * Defined if __sync_add_and_fetch(uint32_t *, uint32_t) and 41 * __sync_sub_and_fetch(uint32_t *, uint32_t) are available, despite 42 * __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4 not being defined (which means the 43 * functions are defined in libgcc instead of being inlines) 44 */ 45 /* #undef JE_FORCE_SYNC_COMPARE_AND_SWAP_4 */ 46 47 /* 48 * Defined if __sync_add_and_fetch(uint64_t *, uint64_t) and 49 * __sync_sub_and_fetch(uint64_t *, uint64_t) are available, despite 50 * __GCC_HAVE_SYNC_COMPARE_AND_SWAP_8 not being defined (which means the 51 * functions are defined in libgcc instead of being inlines) 52 */ 53 /* #undef JE_FORCE_SYNC_COMPARE_AND_SWAP_8 */ 54 55 /* 56 * Defined if __builtin_clz() and __builtin_clzl() are available. 57 */ 58 #define JEMALLOC_HAVE_BUILTIN_CLZ 59 60 /* 61 * Defined if madvise(2) is available. 62 */ 63 #define JEMALLOC_HAVE_MADVISE 64 65 /* 66 * Defined if OSSpin*() functions are available, as provided by Darwin, and 67 * documented in the spinlock(3) manual page. 68 */ 69 /* #undef JEMALLOC_OSSPIN */ 70 71 /* 72 * Defined if _malloc_thread_cleanup() exists. At least in the case of 73 * FreeBSD, pthread_key_create() allocates, which if used during malloc 74 * bootstrapping will cause recursion into the pthreads library. Therefore, if 75 * _malloc_thread_cleanup() exists, use it as the basis for thread cleanup in 76 * malloc_tsd. 77 */ 78 /* #undef JEMALLOC_MALLOC_THREAD_CLEANUP */ 79 80 /* 81 * Defined if threaded initialization is known to be safe on this platform. 82 * Among other things, it must be possible to initialize a mutex without 83 * triggering allocation in order for threaded allocation to be safe. 84 */ 85 #define JEMALLOC_THREADED_INIT 86 87 /* 88 * Defined if the pthreads implementation defines 89 * _pthread_mutex_init_calloc_cb(), in which case the function is used in order 90 * to avoid recursive allocation during mutex initialization. 91 */ 92 /* #undef JEMALLOC_MUTEX_INIT_CB */ 93 94 /* Non-empty if the tls_model attribute is supported. */ 95 #define JEMALLOC_TLS_MODEL 96 97 /* JEMALLOC_CC_SILENCE enables code that silences unuseful compiler warnings. */ 98 #define JEMALLOC_CC_SILENCE 99 100 /* JEMALLOC_CODE_COVERAGE enables test code coverage analysis. */ 101 /* #undef JEMALLOC_CODE_COVERAGE */ 102 103 /* 104 * JEMALLOC_DEBUG enables assertions and other sanity checks, and disables 105 * inline functions. 106 */ 107 /* #undef JEMALLOC_DEBUG */ 108 109 /* JEMALLOC_STATS enables statistics calculation. */ 110 #define JEMALLOC_STATS 111 112 /* JEMALLOC_PROF enables allocation profiling. */ 113 /* #undef JEMALLOC_PROF */ 114 115 /* Use libunwind for profile backtracing if defined. */ 116 /* #undef JEMALLOC_PROF_LIBUNWIND */ 117 118 /* Use libgcc for profile backtracing if defined. */ 119 /* #undef JEMALLOC_PROF_LIBGCC */ 120 121 /* Use gcc intrinsics for profile backtracing if defined. */ 122 /* #undef JEMALLOC_PROF_GCC */ 123 124 /* 125 * JEMALLOC_TCACHE enables a thread-specific caching layer for small objects. 126 * This makes it possible to allocate/deallocate objects without any locking 127 * when the cache is in the steady state. 128 */ 129 #define JEMALLOC_TCACHE 130 131 /* 132 * JEMALLOC_DSS enables use of sbrk(2) to allocate chunks from the data storage 133 * segment (DSS). 134 */ 135 #define JEMALLOC_DSS 136 137 /* Support memory filling (junk/zero/quarantine/redzone). */ 138 #define JEMALLOC_FILL 139 140 /* Support utrace(2)-based tracing. */ 141 /* #undef JEMALLOC_UTRACE */ 142 143 /* Support Valgrind. */ 144 /* #undef JEMALLOC_VALGRIND */ 145 146 /* Support optional abort() on OOM. */ 147 /* #undef JEMALLOC_XMALLOC */ 148 149 /* Support lazy locking (avoid locking unless a second thread is launched). */ 150 /* #undef JEMALLOC_LAZY_LOCK */ 151 152 /* One page is 2^STATIC_PAGE_SHIFT bytes. */ 153 #define STATIC_PAGE_SHIFT 12 154 155 /* 156 * If defined, use munmap() to unmap freed chunks, rather than storing them for 157 * later reuse. This is disabled by default on Linux because common sequences 158 * of mmap()/munmap() calls will cause virtual memory map holes. 159 */ 160 /* #undef JEMALLOC_MUNMAP */ 161 162 /* TLS is used to map arenas and magazine caches to threads. */ 163 /* #undef JEMALLOC_TLS */ 164 165 /* 166 * ffs()/ffsl() functions to use for bitmapping. Don't use these directly; 167 * instead, use jemalloc_ffs() or jemalloc_ffsl() from util.h. 168 */ 169 #define JEMALLOC_INTERNAL_FFSL __builtin_ffsl 170 #define JEMALLOC_INTERNAL_FFS __builtin_ffs 171 172 /* 173 * JEMALLOC_IVSALLOC enables ivsalloc(), which verifies that pointers reside 174 * within jemalloc-owned chunks before dereferencing them. 175 */ 176 /* #undef JEMALLOC_IVSALLOC */ 177 178 /* 179 * Darwin (OS X) uses zones to work around Mach-O symbol override shortcomings. 180 */ 181 /* #undef JEMALLOC_ZONE */ 182 /* #undef JEMALLOC_ZONE_VERSION */ 183 184 /* 185 * Methods for purging unused pages differ between operating systems. 186 * 187 * madvise(..., MADV_DONTNEED) : On Linux, this immediately discards pages, 188 * such that new pages will be demand-zeroed if 189 * the address region is later touched. 190 * madvise(..., MADV_FREE) : On FreeBSD and Darwin, this marks pages as being 191 * unused, such that they will be discarded rather 192 * than swapped out. 193 */ 194 #define JEMALLOC_PURGE_MADVISE_DONTNEED 195 /* #undef JEMALLOC_PURGE_MADVISE_FREE */ 196 197 /* 198 * Define if operating system has alloca.h header. 199 */ 200 #define JEMALLOC_HAS_ALLOCA_H 1 201 202 /* C99 restrict keyword supported. */ 203 #define JEMALLOC_HAS_RESTRICT 1 204 205 /* For use by hash code. */ 206 /* #undef JEMALLOC_BIG_ENDIAN */ 207 208 /* sizeof(int) == 2^LG_SIZEOF_INT. */ 209 #define LG_SIZEOF_INT 2 210 211 /* sizeof(long) == 2^LG_SIZEOF_LONG. */ 212 #ifdef __LP64__ 213 #define LG_SIZEOF_LONG 3 214 #else 215 #define LG_SIZEOF_LONG 2 216 #endif 217 218 /* sizeof(intmax_t) == 2^LG_SIZEOF_INTMAX_T. */ 219 #define LG_SIZEOF_INTMAX_T 3 220 221 #endif /* JEMALLOC_INTERNAL_DEFS_H_ */ 222
