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 C11 atomics are available. */ 31 #define JEMALLOC_C11ATOMICS 32 33 /* Defined if the equivalent of FreeBSD's atomic(9) functions are available. */ 34 /* #undef JEMALLOC_ATOMIC9 */ 35 36 /* 37 * Defined if OSAtomic*() functions are available, as provided by Darwin, and 38 * documented in the atomic(3) manual page. 39 */ 40 /* #undef JEMALLOC_OSATOMIC */ 41 42 /* 43 * Defined if __sync_add_and_fetch(uint32_t *, uint32_t) and 44 * __sync_sub_and_fetch(uint32_t *, uint32_t) are available, despite 45 * __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4 not being defined (which means the 46 * functions are defined in libgcc instead of being inlines). 47 */ 48 /* #undef JE_FORCE_SYNC_COMPARE_AND_SWAP_4 */ 49 50 /* 51 * Defined if __sync_add_and_fetch(uint64_t *, uint64_t) and 52 * __sync_sub_and_fetch(uint64_t *, uint64_t) are available, despite 53 * __GCC_HAVE_SYNC_COMPARE_AND_SWAP_8 not being defined (which means the 54 * functions are defined in libgcc instead of being inlines). 55 */ 56 /* #undef JE_FORCE_SYNC_COMPARE_AND_SWAP_8 */ 57 58 /* 59 * Defined if __builtin_clz() and __builtin_clzl() are available. 60 */ 61 #define JEMALLOC_HAVE_BUILTIN_CLZ 62 63 /* 64 * Defined if madvise(2) is available. 65 */ 66 #define JEMALLOC_HAVE_MADVISE 67 68 /* 69 * Defined if OSSpin*() functions are available, as provided by Darwin, and 70 * documented in the spinlock(3) manual page. 71 */ 72 /* #undef JEMALLOC_OSSPIN */ 73 74 /* 75 * Defined if secure_getenv(3) is available. 76 */ 77 /* #undef JEMALLOC_HAVE_SECURE_GETENV */ 78 79 /* 80 * Defined if issetugid(2) is available. 81 */ 82 /* #undef JEMALLOC_HAVE_ISSETUGID */ 83 84 /* 85 * Defined if _malloc_thread_cleanup() exists. At least in the case of 86 * FreeBSD, pthread_key_create() allocates, which if used during malloc 87 * bootstrapping will cause recursion into the pthreads library. Therefore, if 88 * _malloc_thread_cleanup() exists, use it as the basis for thread cleanup in 89 * malloc_tsd. 90 */ 91 /* #undef JEMALLOC_MALLOC_THREAD_CLEANUP */ 92 93 /* 94 * Defined if threaded initialization is known to be safe on this platform. 95 * Among other things, it must be possible to initialize a mutex without 96 * triggering allocation in order for threaded allocation to be safe. 97 */ 98 #define JEMALLOC_THREADED_INIT 99 100 /* 101 * Defined if the pthreads implementation defines 102 * _pthread_mutex_init_calloc_cb(), in which case the function is used in order 103 * to avoid recursive allocation during mutex initialization. 104 */ 105 /* #undef JEMALLOC_MUTEX_INIT_CB */ 106 107 /* Non-empty if the tls_model attribute is supported. */ 108 #define JEMALLOC_TLS_MODEL 109 110 /* JEMALLOC_CC_SILENCE enables code that silences unuseful compiler warnings. */ 111 #define JEMALLOC_CC_SILENCE 112 113 /* JEMALLOC_CODE_COVERAGE enables test code coverage analysis. */ 114 /* #undef JEMALLOC_CODE_COVERAGE */ 115 116 /* 117 * JEMALLOC_DEBUG enables assertions and other sanity checks, and disables 118 * inline functions. 119 */ 120 /* #undef JEMALLOC_DEBUG */ 121 122 /* JEMALLOC_STATS enables statistics calculation. */ 123 #define JEMALLOC_STATS 124 125 /* JEMALLOC_PROF enables allocation profiling. */ 126 /* #undef JEMALLOC_PROF */ 127 128 /* Use libunwind for profile backtracing if defined. */ 129 /* #undef JEMALLOC_PROF_LIBUNWIND */ 130 131 /* Use libgcc for profile backtracing if defined. */ 132 /* #undef JEMALLOC_PROF_LIBGCC */ 133 134 /* Use gcc intrinsics for profile backtracing if defined. */ 135 /* #undef JEMALLOC_PROF_GCC */ 136 137 /* 138 * JEMALLOC_TCACHE enables a thread-specific caching layer for small objects. 139 * This makes it possible to allocate/deallocate objects without any locking 140 * when the cache is in the steady state. 141 */ 142 /* ANDROID: The tcache is enabled/disabled in the Makefile, not here. */ 143 /* #undef JEMALLOC_TCACHE */ 144 145 /* 146 * JEMALLOC_DSS enables use of sbrk(2) to allocate chunks from the data storage 147 * segment (DSS). 148 */ 149 #define JEMALLOC_DSS 150 151 /* Support memory filling (junk/zero/quarantine/redzone). */ 152 #define JEMALLOC_FILL 153 154 /* Support utrace(2)-based tracing. */ 155 /* #undef JEMALLOC_UTRACE */ 156 157 /* Support Valgrind. */ 158 /* #undef JEMALLOC_VALGRIND */ 159 160 /* Support optional abort() on OOM. */ 161 /* #undef JEMALLOC_XMALLOC */ 162 163 /* Support lazy locking (avoid locking unless a second thread is launched). */ 164 /* #undef JEMALLOC_LAZY_LOCK */ 165 166 /* Minimum size class to support is 2^LG_TINY_MIN bytes. */ 167 #define LG_TINY_MIN 3 168 169 /* 170 * Minimum allocation alignment is 2^LG_QUANTUM bytes (ignoring tiny size 171 * classes). 172 */ 173 /* #undef LG_QUANTUM */ 174 175 /* One page is 2^LG_PAGE bytes. */ 176 #define LG_PAGE 12 177 178 /* 179 * If defined, adjacent virtual memory mappings with identical attributes 180 * automatically coalesce, and they fragment when changes are made to subranges. 181 * This is the normal order of things for mmap()/munmap(), but on Windows 182 * VirtualAlloc()/VirtualFree() operations must be precisely matched, i.e. 183 * mappings do *not* coalesce/fragment. 184 */ 185 #define JEMALLOC_MAPS_COALESCE 186 187 /* 188 * If defined, use munmap() to unmap freed chunks, rather than storing them for 189 * later reuse. This is disabled by default on Linux because common sequences 190 * of mmap()/munmap() calls will cause virtual memory map holes. 191 */ 192 /* #undef JEMALLOC_MUNMAP */ 193 194 /* TLS is used to map arenas and magazine caches to threads. */ 195 /* #undef JEMALLOC_TLS */ 196 197 /* 198 * ffs*() functions to use for bitmapping. Don't use these directly; instead, 199 * use ffs_*() from util.h. 200 */ 201 #define JEMALLOC_INTERNAL_FFSLL __builtin_ffsll 202 #define JEMALLOC_INTERNAL_FFSL __builtin_ffsl 203 #define JEMALLOC_INTERNAL_FFS __builtin_ffs 204 205 /* 206 * JEMALLOC_IVSALLOC enables ivsalloc(), which verifies that pointers reside 207 * within jemalloc-owned chunks before dereferencing them. 208 */ 209 /* #undef JEMALLOC_IVSALLOC */ 210 211 /* 212 * If defined, explicitly attempt to more uniformly distribute large allocation 213 * pointer alignments across all cache indices. 214 */ 215 #define JEMALLOC_CACHE_OBLIVIOUS 216 217 /* 218 * Darwin (OS X) uses zones to work around Mach-O symbol override shortcomings. 219 */ 220 /* #undef JEMALLOC_ZONE */ 221 /* #undef JEMALLOC_ZONE_VERSION */ 222 223 /* 224 * Methods for purging unused pages differ between operating systems. 225 * 226 * madvise(..., MADV_DONTNEED) : On Linux, this immediately discards pages, 227 * such that new pages will be demand-zeroed if 228 * the address region is later touched. 229 * madvise(..., MADV_FREE) : On FreeBSD and Darwin, this marks pages as being 230 * unused, such that they will be discarded rather 231 * than swapped out. 232 */ 233 #define JEMALLOC_PURGE_MADVISE_DONTNEED 234 /* #undef JEMALLOC_PURGE_MADVISE_FREE */ 235 236 /* Define if operating system has alloca.h header. */ 237 #define JEMALLOC_HAS_ALLOCA_H 1 238 239 /* C99 restrict keyword supported. */ 240 #define JEMALLOC_HAS_RESTRICT 1 241 242 /* For use by hash code. */ 243 /* #undef JEMALLOC_BIG_ENDIAN */ 244 245 /* sizeof(int) == 2^LG_SIZEOF_INT. */ 246 #define LG_SIZEOF_INT 2 247 248 /* sizeof(long) == 2^LG_SIZEOF_LONG. */ 249 #ifdef __LP64__ 250 #define LG_SIZEOF_LONG 3 251 #else 252 #define LG_SIZEOF_LONG 2 253 #endif 254 255 /* sizeof(long long) == 2^LG_SIZEOF_LONG_LONG. */ 256 #define LG_SIZEOF_LONG_LONG 3 257 258 /* sizeof(intmax_t) == 2^LG_SIZEOF_INTMAX_T. */ 259 #define LG_SIZEOF_INTMAX_T 3 260 261 /* glibc malloc hooks (__malloc_hook, __realloc_hook, __free_hook). */ 262 /* #undef JEMALLOC_GLIBC_MALLOC_HOOK */ 263 264 /* glibc memalign hook. */ 265 /* #undef JEMALLOC_GLIBC_MEMALIGN_HOOK */ 266 267 /* Adaptive mutex support in pthreads. */ 268 /* #undef JEMALLOC_HAVE_PTHREAD_MUTEX_ADAPTIVE_NP */ 269 270 /* 271 * If defined, jemalloc symbols are not exported (doesn't work when 272 * JEMALLOC_PREFIX is not defined). 273 */ 274 #define JEMALLOC_EXPORT 275 276 /* config.malloc_conf options string. */ 277 #define JEMALLOC_CONFIG_MALLOC_CONF "" 278 279 #endif /* JEMALLOC_INTERNAL_DEFS_H_ */ 280
