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 /* #undef JEMALLOC_PREFIX */ 10 /* #undef JEMALLOC_CPREFIX */ 11 12 /* 13 * Define overrides for non-standard allocator-related functions if they are 14 * present on the system. 15 */ 16 /* #undef JEMALLOC_OVERRIDE___LIBC_CALLOC */ 17 /* #undef JEMALLOC_OVERRIDE___LIBC_FREE */ 18 /* #undef JEMALLOC_OVERRIDE___LIBC_MALLOC */ 19 /* #undef JEMALLOC_OVERRIDE___LIBC_MEMALIGN */ 20 /* #undef JEMALLOC_OVERRIDE___LIBC_REALLOC */ 21 /* #undef JEMALLOC_OVERRIDE___LIBC_VALLOC */ 22 #define JEMALLOC_OVERRIDE___POSIX_MEMALIGN 23 24 /* 25 * JEMALLOC_PRIVATE_NAMESPACE is used as a prefix for all library-private APIs. 26 * For shared libraries, symbol visibility mechanisms prevent these symbols 27 * from being exported, but for static libraries, naming collisions are a real 28 * possibility. 29 */ 30 #define JEMALLOC_PRIVATE_NAMESPACE __je_ 31 32 /* 33 * Hyper-threaded CPUs may need a special instruction inside spin loops in 34 * order to yield to another virtual CPU. 35 */ 36 #define CPU_SPINWAIT __asm__ volatile("pause") 37 /* 1 if CPU_SPINWAIT is defined, 0 otherwise. */ 38 #define HAVE_CPU_SPINWAIT 1 39 40 /* 41 * Number of significant bits in virtual addresses. This may be less than the 42 * total number of bits in a pointer, e.g. on x64, for which the uppermost 16 43 * bits are the same as bit 47. 44 */ 45 #define LG_VADDR 48 46 47 /* Defined if C11 atomics are available. */ 48 /* #undef JEMALLOC_C11_ATOMICS */ 49 50 /* Defined if GCC __atomic atomics are available. */ 51 /* #undef JEMALLOC_GCC_ATOMIC_ATOMICS */ 52 53 /* Defined if GCC __sync atomics are available. */ 54 #define JEMALLOC_GCC_SYNC_ATOMICS 1 55 56 /* 57 * Defined if __sync_add_and_fetch(uint32_t *, uint32_t) and 58 * __sync_sub_and_fetch(uint32_t *, uint32_t) are available, despite 59 * __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4 not being defined (which means the 60 * functions are defined in libgcc instead of being inlines). 61 */ 62 #define JE_FORCE_SYNC_COMPARE_AND_SWAP_4 63 64 /* 65 * Defined if __sync_add_and_fetch(uint64_t *, uint64_t) and 66 * __sync_sub_and_fetch(uint64_t *, uint64_t) are available, despite 67 * __GCC_HAVE_SYNC_COMPARE_AND_SWAP_8 not being defined (which means the 68 * functions are defined in libgcc instead of being inlines). 69 */ 70 #define JE_FORCE_SYNC_COMPARE_AND_SWAP_8 71 72 /* 73 * Defined if __builtin_clz() and __builtin_clzl() are available. 74 */ 75 #define JEMALLOC_HAVE_BUILTIN_CLZ 76 77 /* 78 * Defined if os_unfair_lock_*() functions are available, as provided by Darwin. 79 */ 80 /* #undef JEMALLOC_OS_UNFAIR_LOCK */ 81 82 /* 83 * Defined if OSSpin*() functions are available, as provided by Darwin, and 84 * documented in the spinlock(3) manual page. 85 */ 86 /* #undef JEMALLOC_OSSPIN */ 87 88 /* Defined if syscall(2) is usable. */ 89 #define JEMALLOC_USE_SYSCALL 90 91 /* 92 * Defined if secure_getenv(3) is available. 93 */ 94 /* #undef JEMALLOC_HAVE_SECURE_GETENV */ 95 96 /* 97 * Defined if issetugid(2) is available. 98 */ 99 #define JEMALLOC_HAVE_ISSETUGID 100 101 /* Defined if pthread_atfork(3) is available. */ 102 #define JEMALLOC_HAVE_PTHREAD_ATFORK 103 104 /* Defined if pthread_setname_np(3) is available. */ 105 /* #undef JEMALLOC_HAVE_PTHREAD_SETNAME_NP */ 106 107 /* 108 * Defined if clock_gettime(CLOCK_MONOTONIC_COARSE, ...) is available. 109 */ 110 /* #undef JEMALLOC_HAVE_CLOCK_MONOTONIC_COARSE */ 111 112 /* 113 * Defined if clock_gettime(CLOCK_MONOTONIC, ...) is available. 114 */ 115 #define JEMALLOC_HAVE_CLOCK_MONOTONIC 1 116 117 /* 118 * Defined if mach_absolute_time() is available. 119 */ 120 /* #undef JEMALLOC_HAVE_MACH_ABSOLUTE_TIME */ 121 122 /* 123 * Defined if _malloc_thread_cleanup() exists. At least in the case of 124 * FreeBSD, pthread_key_create() allocates, which if used during malloc 125 * bootstrapping will cause recursion into the pthreads library. Therefore, if 126 * _malloc_thread_cleanup() exists, use it as the basis for thread cleanup in 127 * malloc_tsd. 128 */ 129 #define JEMALLOC_MALLOC_THREAD_CLEANUP 130 131 /* 132 * Defined if threaded initialization is known to be safe on this platform. 133 * Among other things, it must be possible to initialize a mutex without 134 * triggering allocation in order for threaded allocation to be safe. 135 */ 136 /* #undef JEMALLOC_THREADED_INIT */ 137 138 /* 139 * Defined if the pthreads implementation defines 140 * _pthread_mutex_init_calloc_cb(), in which case the function is used in order 141 * to avoid recursive allocation during mutex initialization. 142 */ 143 #define JEMALLOC_MUTEX_INIT_CB 1 144 145 /* Non-empty if the tls_model attribute is supported. */ 146 #define JEMALLOC_TLS_MODEL __attribute__((tls_model("initial-exec"))) 147 148 /* 149 * JEMALLOC_DEBUG enables assertions and other sanity checks, and disables 150 * inline functions. 151 */ 152 /* #undef JEMALLOC_DEBUG */ 153 154 /* JEMALLOC_STATS enables statistics calculation. */ 155 #define JEMALLOC_STATS 156 157 /* JEMALLOC_PROF enables allocation profiling. */ 158 /* #undef JEMALLOC_PROF */ 159 160 /* Use libunwind for profile backtracing if defined. */ 161 /* #undef JEMALLOC_PROF_LIBUNWIND */ 162 163 /* Use libgcc for profile backtracing if defined. */ 164 /* #undef JEMALLOC_PROF_LIBGCC */ 165 166 /* Use gcc intrinsics for profile backtracing if defined. */ 167 /* #undef JEMALLOC_PROF_GCC */ 168 169 /* 170 * JEMALLOC_DSS enables use of sbrk(2) to allocate extents from the data storage 171 * segment (DSS). 172 */ 173 #define JEMALLOC_DSS 174 175 /* Support memory filling (junk/zero). */ 176 #define JEMALLOC_FILL 177 178 /* Support utrace(2)-based tracing. */ 179 #define JEMALLOC_UTRACE 180 181 /* Support optional abort() on OOM. */ 182 #define JEMALLOC_XMALLOC 183 184 /* Support lazy locking (avoid locking unless a second thread is launched). */ 185 #define JEMALLOC_LAZY_LOCK 186 187 /* 188 * Minimum allocation alignment is 2^LG_QUANTUM bytes (ignoring tiny size 189 * classes). 190 */ 191 /* #undef LG_QUANTUM */ 192 193 /* One page is 2^LG_PAGE bytes. */ 194 #define LG_PAGE 12 195 196 /* 197 * One huge page is 2^LG_HUGEPAGE bytes. Note that this is defined even if the 198 * system does not explicitly support huge pages; system calls that require 199 * explicit huge page support are separately configured. 200 */ 201 #define LG_HUGEPAGE 21 202 203 /* 204 * If defined, adjacent virtual memory mappings with identical attributes 205 * automatically coalesce, and they fragment when changes are made to subranges. 206 * This is the normal order of things for mmap()/munmap(), but on Windows 207 * VirtualAlloc()/VirtualFree() operations must be precisely matched, i.e. 208 * mappings do *not* coalesce/fragment. 209 */ 210 #define JEMALLOC_MAPS_COALESCE 211 212 /* 213 * If defined, retain memory for later reuse by default rather than using e.g. 214 * munmap() to unmap freed extents. This is enabled on 64-bit Linux because 215 * common sequences of mmap()/munmap() calls will cause virtual memory map 216 * holes. 217 */ 218 /* #undef JEMALLOC_RETAIN */ 219 220 /* TLS is used to map arenas and magazine caches to threads. */ 221 #define JEMALLOC_TLS 222 223 /* 224 * Used to mark unreachable code to quiet "end of non-void" compiler warnings. 225 * Don't use this directly; instead use unreachable() from util.h 226 */ 227 #define JEMALLOC_INTERNAL_UNREACHABLE abort 228 229 /* 230 * ffs*() functions to use for bitmapping. Don't use these directly; instead, 231 * use ffs_*() from util.h. 232 */ 233 #define JEMALLOC_INTERNAL_FFSLL __builtin_ffsll 234 #define JEMALLOC_INTERNAL_FFSL __builtin_ffsl 235 #define JEMALLOC_INTERNAL_FFS __builtin_ffs 236 237 /* 238 * If defined, explicitly attempt to more uniformly distribute large allocation 239 * pointer alignments across all cache indices. 240 */ 241 #define JEMALLOC_CACHE_OBLIVIOUS 242 243 /* 244 * If defined, enable logging facilities. We make this a configure option to 245 * avoid taking extra branches everywhere. 246 */ 247 /* #undef JEMALLOC_LOG */ 248 249 /* 250 * Darwin (OS X) uses zones to work around Mach-O symbol override shortcomings. 251 */ 252 /* #undef JEMALLOC_ZONE */ 253 254 /* 255 * Methods for determining whether the OS overcommits. 256 * JEMALLOC_PROC_SYS_VM_OVERCOMMIT_MEMORY: Linux's 257 * /proc/sys/vm.overcommit_memory file. 258 * JEMALLOC_SYSCTL_VM_OVERCOMMIT: FreeBSD's vm.overcommit sysctl. 259 */ 260 #define JEMALLOC_SYSCTL_VM_OVERCOMMIT 261 /* #undef JEMALLOC_PROC_SYS_VM_OVERCOMMIT_MEMORY */ 262 263 /* Defined if madvise(2) is available. */ 264 #define JEMALLOC_HAVE_MADVISE 265 266 /* 267 * Defined if transparent huge pages are supported via the MADV_[NO]HUGEPAGE 268 * arguments to madvise(2). 269 */ 270 /* #undef JEMALLOC_HAVE_MADVISE_HUGE */ 271 272 /* 273 * Methods for purging unused pages differ between operating systems. 274 * 275 * madvise(..., MADV_FREE) : This marks pages as being unused, such that they 276 * will be discarded rather than swapped out. 277 * madvise(..., MADV_DONTNEED) : If JEMALLOC_PURGE_MADVISE_DONTNEED_ZEROS is 278 * defined, this immediately discards pages, 279 * such that new pages will be demand-zeroed if 280 * the address region is later touched; 281 * otherwise this behaves similarly to 282 * MADV_FREE, though typically with higher 283 * system overhead. 284 */ 285 #define JEMALLOC_PURGE_MADVISE_FREE 286 #define JEMALLOC_PURGE_MADVISE_DONTNEED 287 /* #undef JEMALLOC_PURGE_MADVISE_DONTNEED_ZEROS */ 288 289 /* Defined if madvise(2) is available but MADV_FREE is not (x86 Linux only). */ 290 /* #undef JEMALLOC_DEFINE_MADVISE_FREE */ 291 292 /* 293 * Defined if MADV_DO[NT]DUMP is supported as an argument to madvise. 294 */ 295 /* #undef JEMALLOC_MADVISE_DONTDUMP */ 296 297 /* 298 * Defined if transparent huge pages (THPs) are supported via the 299 * MADV_[NO]HUGEPAGE arguments to madvise(2), and THP support is enabled. 300 */ 301 /* #undef JEMALLOC_THP */ 302 303 /* Define if operating system has alloca.h header. */ 304 /* #undef JEMALLOC_HAS_ALLOCA_H */ 305 306 /* C99 restrict keyword supported. */ 307 #define JEMALLOC_HAS_RESTRICT 1 308 309 /* For use by hash code. */ 310 /* #undef JEMALLOC_BIG_ENDIAN */ 311 312 /* sizeof(int) == 2^LG_SIZEOF_INT. */ 313 #define LG_SIZEOF_INT 2 314 315 /* sizeof(long) == 2^LG_SIZEOF_LONG. */ 316 #define LG_SIZEOF_LONG 3 317 318 /* sizeof(long long) == 2^LG_SIZEOF_LONG_LONG. */ 319 #define LG_SIZEOF_LONG_LONG 3 320 321 /* sizeof(intmax_t) == 2^LG_SIZEOF_INTMAX_T. */ 322 #define LG_SIZEOF_INTMAX_T 3 323 324 /* glibc malloc hooks (__malloc_hook, __realloc_hook, __free_hook). */ 325 /* #undef JEMALLOC_GLIBC_MALLOC_HOOK */ 326 327 /* glibc memalign hook. */ 328 /* #undef JEMALLOC_GLIBC_MEMALIGN_HOOK */ 329 330 /* pthread support */ 331 #define JEMALLOC_HAVE_PTHREAD 332 333 /* dlsym() support */ 334 #define JEMALLOC_HAVE_DLSYM 335 336 /* Adaptive mutex support in pthreads. */ 337 #define JEMALLOC_HAVE_PTHREAD_MUTEX_ADAPTIVE_NP 338 339 /* GNU specific sched_getcpu support */ 340 /* #undef JEMALLOC_HAVE_SCHED_GETCPU */ 341 342 /* GNU specific sched_setaffinity support */ 343 /* #undef JEMALLOC_HAVE_SCHED_SETAFFINITY */ 344 345 /* 346 * If defined, all the features necessary for background threads are present. 347 */ 348 #define JEMALLOC_BACKGROUND_THREAD 1 349 350 /* 351 * If defined, jemalloc symbols are not exported (doesn't work when 352 * JEMALLOC_PREFIX is not defined). 353 */ 354 /* #undef JEMALLOC_EXPORT */ 355 356 /* config.malloc_conf options string. */ 357 #define JEMALLOC_CONFIG_MALLOC_CONF "abort_conf:false" 358 359 /* If defined, jemalloc takes the malloc/free/etc. symbol names. */ 360 #define JEMALLOC_IS_MALLOC 1 361 362 /* 363 * Defined if strerror_r returns char * if _GNU_SOURCE is defined. 364 */ 365 /* #undef JEMALLOC_STRERROR_R_RETURNS_CHAR_WITH_GNU_SOURCE */ 366 367 #endif /* JEMALLOC_INTERNAL_DEFS_H_ */ 368