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