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 #define JEMALLOC_C11_ATOMICS 1 49 50 /* Defined if GCC __atomic atomics are available. */ 51 #define JEMALLOC_GCC_ATOMIC_ATOMICS 1 52 /* and the 8-bit variant support. */ 53 #define JEMALLOC_GCC_U8_ATOMIC_ATOMICS 1 54 55 /* Defined if GCC __sync atomics are available. */ 56 #define JEMALLOC_GCC_SYNC_ATOMICS 1 57 /* and the 8-bit variant support. */ 58 #define JEMALLOC_GCC_U8_SYNC_ATOMICS 1 59 60 /* 61 * Defined if __builtin_clz() and __builtin_clzl() are available. 62 */ 63 #define JEMALLOC_HAVE_BUILTIN_CLZ 64 65 /* 66 * Defined if os_unfair_lock_*() functions are available, as provided by Darwin. 67 */ 68 /* #undef JEMALLOC_OS_UNFAIR_LOCK */ 69 70 /* Defined if syscall(2) is usable. */ 71 #define JEMALLOC_USE_SYSCALL 72 73 /* 74 * Defined if secure_getenv(3) is available. 75 */ 76 /* #undef JEMALLOC_HAVE_SECURE_GETENV */ 77 78 /* 79 * Defined if issetugid(2) is available. 80 */ 81 #define JEMALLOC_HAVE_ISSETUGID 82 83 /* Defined if pthread_atfork(3) is available. */ 84 #define JEMALLOC_HAVE_PTHREAD_ATFORK 85 86 /* Defined if pthread_setname_np(3) is available. */ 87 /* #undef JEMALLOC_HAVE_PTHREAD_SETNAME_NP */ 88 89 /* 90 * Defined if clock_gettime(CLOCK_MONOTONIC_COARSE, ...) is available. 91 */ 92 /* #undef JEMALLOC_HAVE_CLOCK_MONOTONIC_COARSE */ 93 94 /* 95 * Defined if clock_gettime(CLOCK_MONOTONIC, ...) is available. 96 */ 97 #define JEMALLOC_HAVE_CLOCK_MONOTONIC 1 98 99 /* 100 * Defined if mach_absolute_time() is available. 101 */ 102 /* #undef JEMALLOC_HAVE_MACH_ABSOLUTE_TIME */ 103 104 /* 105 * Defined if _malloc_thread_cleanup() exists. At least in the case of 106 * FreeBSD, pthread_key_create() allocates, which if used during malloc 107 * bootstrapping will cause recursion into the pthreads library. Therefore, if 108 * _malloc_thread_cleanup() exists, use it as the basis for thread cleanup in 109 * malloc_tsd. 110 */ 111 #define JEMALLOC_MALLOC_THREAD_CLEANUP 112 113 /* 114 * Defined if threaded initialization is known to be safe on this platform. 115 * Among other things, it must be possible to initialize a mutex without 116 * triggering allocation in order for threaded allocation to be safe. 117 */ 118 /* #undef JEMALLOC_THREADED_INIT */ 119 120 /* 121 * Defined if the pthreads implementation defines 122 * _pthread_mutex_init_calloc_cb(), in which case the function is used in order 123 * to avoid recursive allocation during mutex initialization. 124 */ 125 #define JEMALLOC_MUTEX_INIT_CB 1 126 127 /* Non-empty if the tls_model attribute is supported. */ 128 #define JEMALLOC_TLS_MODEL __attribute__((tls_model("initial-exec"))) 129 130 /* 131 * JEMALLOC_DEBUG enables assertions and other sanity checks, and disables 132 * inline functions. 133 */ 134 /* #undef JEMALLOC_DEBUG */ 135 136 /* JEMALLOC_STATS enables statistics calculation. */ 137 #define JEMALLOC_STATS 138 139 /* JEMALLOC_EXPERIMENTAL_SMALLOCX_API enables experimental smallocx API. */ 140 /* #undef JEMALLOC_EXPERIMENTAL_SMALLOCX_API */ 141 142 /* JEMALLOC_PROF enables allocation profiling. */ 143 /* #undef JEMALLOC_PROF */ 144 145 /* Use libunwind for profile backtracing if defined. */ 146 /* #undef JEMALLOC_PROF_LIBUNWIND */ 147 148 /* Use libgcc for profile backtracing if defined. */ 149 /* #undef JEMALLOC_PROF_LIBGCC */ 150 151 /* Use gcc intrinsics for profile backtracing if defined. */ 152 /* #undef JEMALLOC_PROF_GCC */ 153 154 /* 155 * JEMALLOC_DSS enables use of sbrk(2) to allocate extents from the data storage 156 * segment (DSS). 157 */ 158 #define JEMALLOC_DSS 159 160 /* Support memory filling (junk/zero). */ 161 #define JEMALLOC_FILL 162 163 /* Support utrace(2)-based tracing. */ 164 #define JEMALLOC_UTRACE 165 166 /* Support optional abort() on OOM. */ 167 #define JEMALLOC_XMALLOC 168 169 /* Support lazy locking (avoid locking unless a second thread is launched). */ 170 #define JEMALLOC_LAZY_LOCK 171 172 /* 173 * Minimum allocation alignment is 2^LG_QUANTUM bytes (ignoring tiny size 174 * classes). 175 */ 176 /* #undef LG_QUANTUM */ 177 178 /* One page is 2^LG_PAGE bytes. */ 179 #define LG_PAGE 12 180 181 /* 182 * One huge page is 2^LG_HUGEPAGE bytes. Note that this is defined even if the 183 * system does not explicitly support huge pages; system calls that require 184 * explicit huge page support are separately configured. 185 */ 186 #define LG_HUGEPAGE 21 187 188 /* 189 * If defined, adjacent virtual memory mappings with identical attributes 190 * automatically coalesce, and they fragment when changes are made to subranges. 191 * This is the normal order of things for mmap()/munmap(), but on Windows 192 * VirtualAlloc()/VirtualFree() operations must be precisely matched, i.e. 193 * mappings do *not* coalesce/fragment. 194 */ 195 #define JEMALLOC_MAPS_COALESCE 196 197 /* 198 * If defined, retain memory for later reuse by default rather than using e.g. 199 * munmap() to unmap freed extents. This is enabled on 64-bit Linux because 200 * common sequences of mmap()/munmap() calls will cause virtual memory map 201 * holes. 202 */ 203 /* #undef JEMALLOC_RETAIN */ 204 205 /* TLS is used to map arenas and magazine caches to threads. */ 206 #define JEMALLOC_TLS 207 208 /* 209 * Used to mark unreachable code to quiet "end of non-void" compiler warnings. 210 * Don't use this directly; instead use unreachable() from util.h 211 */ 212 #define JEMALLOC_INTERNAL_UNREACHABLE __builtin_unreachable 213 214 /* 215 * ffs*() functions to use for bitmapping. Don't use these directly; instead, 216 * use ffs_*() from util.h. 217 */ 218 #define JEMALLOC_INTERNAL_FFSLL __builtin_ffsll 219 #define JEMALLOC_INTERNAL_FFSL __builtin_ffsl 220 #define JEMALLOC_INTERNAL_FFS __builtin_ffs 221 222 /* 223 * popcount*() functions to use for bitmapping. 224 */ 225 #define JEMALLOC_INTERNAL_POPCOUNTL __builtin_popcountl 226 #define JEMALLOC_INTERNAL_POPCOUNT __builtin_popcount 227 228 /* 229 * If defined, explicitly attempt to more uniformly distribute large allocation 230 * pointer alignments across all cache indices. 231 */ 232 #define JEMALLOC_CACHE_OBLIVIOUS 233 234 /* 235 * If defined, enable logging facilities. We make this a configure option to 236 * avoid taking extra branches everywhere. 237 */ 238 /* #undef JEMALLOC_LOG */ 239 240 /* 241 * If defined, use readlinkat() (instead of readlink()) to follow 242 * /etc/malloc_conf. 243 */ 244 /* #undef JEMALLOC_READLINKAT */ 245 246 /* 247 * Darwin (OS X) uses zones to work around Mach-O symbol override shortcomings. 248 */ 249 /* #undef JEMALLOC_ZONE */ 250 251 /* 252 * Methods for determining whether the OS overcommits. 253 * JEMALLOC_PROC_SYS_VM_OVERCOMMIT_MEMORY: Linux's 254 * /proc/sys/vm.overcommit_memory file. 255 * JEMALLOC_SYSCTL_VM_OVERCOMMIT: FreeBSD's vm.overcommit sysctl. 256 */ 257 #define JEMALLOC_SYSCTL_VM_OVERCOMMIT 258 /* #undef JEMALLOC_PROC_SYS_VM_OVERCOMMIT_MEMORY */ 259 260 /* Defined if madvise(2) is available. */ 261 #define JEMALLOC_HAVE_MADVISE 262 263 /* 264 * Defined if transparent huge pages are supported via the MADV_[NO]HUGEPAGE 265 * arguments to madvise(2). 266 */ 267 /* #undef JEMALLOC_HAVE_MADVISE_HUGE */ 268 269 /* 270 * Methods for purging unused pages differ between operating systems. 271 * 272 * madvise(..., MADV_FREE) : This marks pages as being unused, such that they 273 * will be discarded rather than swapped out. 274 * madvise(..., MADV_DONTNEED) : If JEMALLOC_PURGE_MADVISE_DONTNEED_ZEROS is 275 * defined, this immediately discards pages, 276 * such that new pages will be demand-zeroed if 277 * the address region is later touched; 278 * otherwise this behaves similarly to 279 * MADV_FREE, though typically with higher 280 * system overhead. 281 */ 282 #define JEMALLOC_PURGE_MADVISE_FREE 283 #define JEMALLOC_PURGE_MADVISE_DONTNEED 284 /* #undef JEMALLOC_PURGE_MADVISE_DONTNEED_ZEROS */ 285 286 /* Defined if madvise(2) is available but MADV_FREE is not (x86 Linux only). */ 287 /* #undef JEMALLOC_DEFINE_MADVISE_FREE */ 288 289 /* 290 * Defined if MADV_DO[NT]DUMP is supported as an argument to madvise. 291 */ 292 /* #undef JEMALLOC_MADVISE_DONTDUMP */ 293 294 /* 295 * Defined if transparent huge pages (THPs) are supported via the 296 * MADV_[NO]HUGEPAGE arguments to madvise(2), and THP support is enabled. 297 */ 298 /* #undef JEMALLOC_THP */ 299 300 /* Define if operating system has alloca.h header. */ 301 /* #undef JEMALLOC_HAS_ALLOCA_H */ 302 303 /* C99 restrict keyword supported. */ 304 #define JEMALLOC_HAS_RESTRICT 1 305 306 /* For use by hash code. */ 307 /* #undef JEMALLOC_BIG_ENDIAN */ 308 309 /* sizeof(int) == 2^LG_SIZEOF_INT. */ 310 #define LG_SIZEOF_INT 2 311 312 /* sizeof(long) == 2^LG_SIZEOF_LONG. */ 313 #define LG_SIZEOF_LONG 3 314 315 /* sizeof(long long) == 2^LG_SIZEOF_LONG_LONG. */ 316 #define LG_SIZEOF_LONG_LONG 3 317 318 /* sizeof(intmax_t) == 2^LG_SIZEOF_INTMAX_T. */ 319 #define LG_SIZEOF_INTMAX_T 3 320 321 /* glibc malloc hooks (__malloc_hook, __realloc_hook, __free_hook). */ 322 /* #undef JEMALLOC_GLIBC_MALLOC_HOOK */ 323 324 /* glibc memalign hook. */ 325 /* #undef JEMALLOC_GLIBC_MEMALIGN_HOOK */ 326 327 /* pthread support */ 328 #define JEMALLOC_HAVE_PTHREAD 329 330 /* dlsym() support */ 331 #define JEMALLOC_HAVE_DLSYM 332 333 /* Adaptive mutex support in pthreads. */ 334 #define JEMALLOC_HAVE_PTHREAD_MUTEX_ADAPTIVE_NP 335 336 /* GNU specific sched_getcpu support */ 337 /* #undef JEMALLOC_HAVE_SCHED_GETCPU */ 338 339 /* GNU specific sched_setaffinity support */ 340 /* #undef JEMALLOC_HAVE_SCHED_SETAFFINITY */ 341 342 /* 343 * If defined, all the features necessary for background threads are present. 344 */ 345 #define JEMALLOC_BACKGROUND_THREAD 1 346 347 /* 348 * If defined, jemalloc symbols are not exported (doesn't work when 349 * JEMALLOC_PREFIX is not defined). 350 */ 351 /* #undef JEMALLOC_EXPORT */ 352 353 /* config.malloc_conf options string. */ 354 #define JEMALLOC_CONFIG_MALLOC_CONF "abort_conf:false" 355 356 /* If defined, jemalloc takes the malloc/free/etc. symbol names. */ 357 #define JEMALLOC_IS_MALLOC 1 358 359 /* 360 * Defined if strerror_r returns char * if _GNU_SOURCE is defined. 361 */ 362 /* #undef JEMALLOC_STRERROR_R_RETURNS_CHAR_WITH_GNU_SOURCE */ 363 364 /* Performs additional safety checks when defined. */ 365 /* #undef JEMALLOC_OPT_SAFETY_CHECKS */ 366 367 #endif /* JEMALLOC_INTERNAL_DEFS_H_ */ 368