1 #ifndef JEMALLOC_INTERNAL_DEFS_H_ 2 #define JEMALLOC_INTERNAL_DEFS_H_ 3 /* 4 * If JEMALLOC_PREFIX is defined via --with-jemalloc-prefix, it will cause all 5 * public APIs to be prefixed. This makes it possible, with some care, to use 6 * multiple allocators simultaneously. 7 */ 8 #undef JEMALLOC_PREFIX 9 #undef JEMALLOC_CPREFIX 10 11 /* 12 * JEMALLOC_PRIVATE_NAMESPACE is used as a prefix for all library-private APIs. 13 * For shared libraries, symbol visibility mechanisms prevent these symbols 14 * from being exported, but for static libraries, naming collisions are a real 15 * possibility. 16 */ 17 #undef JEMALLOC_PRIVATE_NAMESPACE 18 19 /* 20 * Hyper-threaded CPUs may need a special instruction inside spin loops in 21 * order to yield to another virtual CPU. 22 */ 23 #undef CPU_SPINWAIT 24 25 /* Defined if C11 atomics are available. */ 26 #undef JEMALLOC_C11ATOMICS 27 28 /* Defined if the equivalent of FreeBSD's atomic(9) functions are available. */ 29 #undef JEMALLOC_ATOMIC9 30 31 /* 32 * Defined if OSAtomic*() functions are available, as provided by Darwin, and 33 * documented in the atomic(3) manual page. 34 */ 35 #undef JEMALLOC_OSATOMIC 36 37 /* 38 * Defined if __sync_add_and_fetch(uint32_t *, uint32_t) and 39 * __sync_sub_and_fetch(uint32_t *, uint32_t) are available, despite 40 * __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4 not being defined (which means the 41 * functions are defined in libgcc instead of being inlines). 42 */ 43 #undef JE_FORCE_SYNC_COMPARE_AND_SWAP_4 44 45 /* 46 * Defined if __sync_add_and_fetch(uint64_t *, uint64_t) and 47 * __sync_sub_and_fetch(uint64_t *, uint64_t) are available, despite 48 * __GCC_HAVE_SYNC_COMPARE_AND_SWAP_8 not being defined (which means the 49 * functions are defined in libgcc instead of being inlines). 50 */ 51 #undef JE_FORCE_SYNC_COMPARE_AND_SWAP_8 52 53 /* 54 * Defined if __builtin_clz() and __builtin_clzl() are available. 55 */ 56 #undef JEMALLOC_HAVE_BUILTIN_CLZ 57 58 /* 59 * Defined if os_unfair_lock_*() functions are available, as provided by Darwin. 60 */ 61 #undef JEMALLOC_OS_UNFAIR_LOCK 62 63 /* 64 * Defined if OSSpin*() functions are available, as provided by Darwin, and 65 * documented in the spinlock(3) manual page. 66 */ 67 #undef JEMALLOC_OSSPIN 68 69 /* Defined if syscall(2) is usable. */ 70 #undef JEMALLOC_USE_SYSCALL 71 72 /* 73 * Defined if secure_getenv(3) is available. 74 */ 75 #undef JEMALLOC_HAVE_SECURE_GETENV 76 77 /* 78 * Defined if issetugid(2) is available. 79 */ 80 #undef JEMALLOC_HAVE_ISSETUGID 81 82 /* Defined if pthread_atfork(3) is available. */ 83 #undef JEMALLOC_HAVE_PTHREAD_ATFORK 84 85 /* 86 * Defined if clock_gettime(CLOCK_MONOTONIC_COARSE, ...) is available. 87 */ 88 #undef JEMALLOC_HAVE_CLOCK_MONOTONIC_COARSE 89 90 /* 91 * Defined if clock_gettime(CLOCK_MONOTONIC, ...) is available. 92 */ 93 #undef JEMALLOC_HAVE_CLOCK_MONOTONIC 94 95 /* 96 * Defined if mach_absolute_time() is available. 97 */ 98 #undef JEMALLOC_HAVE_MACH_ABSOLUTE_TIME 99 100 /* 101 * Defined if _malloc_thread_cleanup() exists. At least in the case of 102 * FreeBSD, pthread_key_create() allocates, which if used during malloc 103 * bootstrapping will cause recursion into the pthreads library. Therefore, if 104 * _malloc_thread_cleanup() exists, use it as the basis for thread cleanup in 105 * malloc_tsd. 106 */ 107 #undef JEMALLOC_MALLOC_THREAD_CLEANUP 108 109 /* 110 * Defined if threaded initialization is known to be safe on this platform. 111 * Among other things, it must be possible to initialize a mutex without 112 * triggering allocation in order for threaded allocation to be safe. 113 */ 114 #undef JEMALLOC_THREADED_INIT 115 116 /* 117 * Defined if the pthreads implementation defines 118 * _pthread_mutex_init_calloc_cb(), in which case the function is used in order 119 * to avoid recursive allocation during mutex initialization. 120 */ 121 #undef JEMALLOC_MUTEX_INIT_CB 122 123 /* Non-empty if the tls_model attribute is supported. */ 124 #undef JEMALLOC_TLS_MODEL 125 126 /* JEMALLOC_CC_SILENCE enables code that silences unuseful compiler warnings. */ 127 #undef JEMALLOC_CC_SILENCE 128 129 /* JEMALLOC_CODE_COVERAGE enables test code coverage analysis. */ 130 #undef JEMALLOC_CODE_COVERAGE 131 132 /* 133 * JEMALLOC_DEBUG enables assertions and other sanity checks, and disables 134 * inline functions. 135 */ 136 #undef JEMALLOC_DEBUG 137 138 /* JEMALLOC_STATS enables statistics calculation. */ 139 #undef JEMALLOC_STATS 140 141 /* JEMALLOC_PROF enables allocation profiling. */ 142 #undef JEMALLOC_PROF 143 144 /* Use libunwind for profile backtracing if defined. */ 145 #undef JEMALLOC_PROF_LIBUNWIND 146 147 /* Use libgcc for profile backtracing if defined. */ 148 #undef JEMALLOC_PROF_LIBGCC 149 150 /* Use gcc intrinsics for profile backtracing if defined. */ 151 #undef JEMALLOC_PROF_GCC 152 153 /* 154 * JEMALLOC_TCACHE enables a thread-specific caching layer for small objects. 155 * This makes it possible to allocate/deallocate objects without any locking 156 * when the cache is in the steady state. 157 */ 158 #undef JEMALLOC_TCACHE 159 160 /* 161 * JEMALLOC_DSS enables use of sbrk(2) to allocate chunks from the data storage 162 * segment (DSS). 163 */ 164 #undef JEMALLOC_DSS 165 166 /* Support memory filling (junk/zero/quarantine/redzone). */ 167 #undef JEMALLOC_FILL 168 169 /* Support utrace(2)-based tracing. */ 170 #undef JEMALLOC_UTRACE 171 172 /* Support Valgrind. */ 173 #undef JEMALLOC_VALGRIND 174 175 /* Support optional abort() on OOM. */ 176 #undef JEMALLOC_XMALLOC 177 178 /* Support lazy locking (avoid locking unless a second thread is launched). */ 179 #undef JEMALLOC_LAZY_LOCK 180 181 /* Minimum size class to support is 2^LG_TINY_MIN bytes. */ 182 #undef LG_TINY_MIN 183 184 /* 185 * Minimum allocation alignment is 2^LG_QUANTUM bytes (ignoring tiny size 186 * classes). 187 */ 188 #undef LG_QUANTUM 189 190 /* One page is 2^LG_PAGE bytes. */ 191 #undef LG_PAGE 192 193 /* 194 * If defined, adjacent virtual memory mappings with identical attributes 195 * automatically coalesce, and they fragment when changes are made to subranges. 196 * This is the normal order of things for mmap()/munmap(), but on Windows 197 * VirtualAlloc()/VirtualFree() operations must be precisely matched, i.e. 198 * mappings do *not* coalesce/fragment. 199 */ 200 #undef JEMALLOC_MAPS_COALESCE 201 202 /* 203 * If defined, use munmap() to unmap freed chunks, rather than storing them for 204 * later reuse. This is disabled by default on Linux because common sequences 205 * of mmap()/munmap() calls will cause virtual memory map holes. 206 */ 207 #undef JEMALLOC_MUNMAP 208 209 /* TLS is used to map arenas and magazine caches to threads. */ 210 #undef JEMALLOC_TLS 211 212 /* 213 * Used to mark unreachable code to quiet "end of non-void" compiler warnings. 214 * Don't use this directly; instead use unreachable() from util.h 215 */ 216 #undef JEMALLOC_INTERNAL_UNREACHABLE 217 218 /* 219 * ffs*() functions to use for bitmapping. Don't use these directly; instead, 220 * use ffs_*() from util.h. 221 */ 222 #undef JEMALLOC_INTERNAL_FFSLL 223 #undef JEMALLOC_INTERNAL_FFSL 224 #undef JEMALLOC_INTERNAL_FFS 225 226 /* 227 * JEMALLOC_IVSALLOC enables ivsalloc(), which verifies that pointers reside 228 * within jemalloc-owned chunks before dereferencing them. 229 */ 230 #undef JEMALLOC_IVSALLOC 231 232 /* 233 * If defined, explicitly attempt to more uniformly distribute large allocation 234 * pointer alignments across all cache indices. 235 */ 236 #undef JEMALLOC_CACHE_OBLIVIOUS 237 238 /* 239 * Darwin (OS X) uses zones to work around Mach-O symbol override shortcomings. 240 */ 241 #undef JEMALLOC_ZONE 242 #undef JEMALLOC_ZONE_VERSION 243 244 /* 245 * Methods for determining whether the OS overcommits. 246 * JEMALLOC_PROC_SYS_VM_OVERCOMMIT_MEMORY: Linux's 247 * /proc/sys/vm.overcommit_memory file. 248 * JEMALLOC_SYSCTL_VM_OVERCOMMIT: FreeBSD's vm.overcommit sysctl. 249 */ 250 #undef JEMALLOC_SYSCTL_VM_OVERCOMMIT 251 #undef JEMALLOC_PROC_SYS_VM_OVERCOMMIT_MEMORY 252 253 /* Defined if madvise(2) is available. */ 254 #undef JEMALLOC_HAVE_MADVISE 255 256 /* 257 * Methods for purging unused pages differ between operating systems. 258 * 259 * madvise(..., MADV_FREE) : This marks pages as being unused, such that they 260 * will be discarded rather than swapped out. 261 * madvise(..., MADV_DONTNEED) : This immediately discards pages, such that 262 * new pages will be demand-zeroed if the 263 * address region is later touched. 264 */ 265 #undef JEMALLOC_PURGE_MADVISE_FREE 266 #undef JEMALLOC_PURGE_MADVISE_DONTNEED 267 268 /* 269 * Defined if transparent huge pages are supported via the MADV_[NO]HUGEPAGE 270 * arguments to madvise(2). 271 */ 272 #undef JEMALLOC_THP 273 274 /* Define if operating system has alloca.h header. */ 275 #undef JEMALLOC_HAS_ALLOCA_H 276 277 /* C99 restrict keyword supported. */ 278 #undef JEMALLOC_HAS_RESTRICT 279 280 /* For use by hash code. */ 281 #undef JEMALLOC_BIG_ENDIAN 282 283 /* sizeof(int) == 2^LG_SIZEOF_INT. */ 284 #undef LG_SIZEOF_INT 285 286 /* sizeof(long) == 2^LG_SIZEOF_LONG. */ 287 #undef LG_SIZEOF_LONG 288 289 /* sizeof(long long) == 2^LG_SIZEOF_LONG_LONG. */ 290 #undef LG_SIZEOF_LONG_LONG 291 292 /* sizeof(intmax_t) == 2^LG_SIZEOF_INTMAX_T. */ 293 #undef LG_SIZEOF_INTMAX_T 294 295 /* glibc malloc hooks (__malloc_hook, __realloc_hook, __free_hook). */ 296 #undef JEMALLOC_GLIBC_MALLOC_HOOK 297 298 /* glibc memalign hook. */ 299 #undef JEMALLOC_GLIBC_MEMALIGN_HOOK 300 301 /* Adaptive mutex support in pthreads. */ 302 #undef JEMALLOC_HAVE_PTHREAD_MUTEX_ADAPTIVE_NP 303 304 /* 305 * If defined, jemalloc symbols are not exported (doesn't work when 306 * JEMALLOC_PREFIX is not defined). 307 */ 308 #undef JEMALLOC_EXPORT 309 310 /* config.malloc_conf options string. */ 311 #undef JEMALLOC_CONFIG_MALLOC_CONF 312 313 #endif /* JEMALLOC_INTERNAL_DEFS_H_ */ 314
