c67c3e4a63
Control use of munmap(2) via a run-time option rather than a compile-time option (with the same per platform default). The old behavior of --disable-munmap can be achieved with --with-malloc-conf=munmap:false. This partially resolves #580.
311 lines
8.9 KiB
C
311 lines
8.9 KiB
C
#ifndef JEMALLOC_INTERNAL_DEFS_H_
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#define JEMALLOC_INTERNAL_DEFS_H_
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/*
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* If JEMALLOC_PREFIX is defined via --with-jemalloc-prefix, it will cause all
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* public APIs to be prefixed. This makes it possible, with some care, to use
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* multiple allocators simultaneously.
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*/
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#undef JEMALLOC_PREFIX
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#undef JEMALLOC_CPREFIX
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/*
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* JEMALLOC_PRIVATE_NAMESPACE is used as a prefix for all library-private APIs.
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* For shared libraries, symbol visibility mechanisms prevent these symbols
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* from being exported, but for static libraries, naming collisions are a real
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* possibility.
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*/
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#undef JEMALLOC_PRIVATE_NAMESPACE
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/*
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* Hyper-threaded CPUs may need a special instruction inside spin loops in
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* order to yield to another virtual CPU.
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*/
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#undef CPU_SPINWAIT
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/*
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* Number of significant bits in virtual addresses. This may be less than the
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* total number of bits in a pointer, e.g. on x64, for which the uppermost 16
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* bits are the same as bit 47.
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*/
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#undef LG_VADDR
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/* Defined if C11 atomics are available. */
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#undef JEMALLOC_C11_ATOMICS
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/* Defined if GCC __atomic atomics are available. */
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#undef JEMALLOC_GCC_ATOMIC_ATOMICS
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/* Defined if GCC __sync atomics are available. */
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#undef JEMALLOC_GCC_SYNC_ATOMICS
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/*
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* Defined if __sync_add_and_fetch(uint32_t *, uint32_t) and
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* __sync_sub_and_fetch(uint32_t *, uint32_t) are available, despite
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* __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4 not being defined (which means the
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* functions are defined in libgcc instead of being inlines).
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*/
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#undef JE_FORCE_SYNC_COMPARE_AND_SWAP_4
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/*
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* Defined if __sync_add_and_fetch(uint64_t *, uint64_t) and
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* __sync_sub_and_fetch(uint64_t *, uint64_t) are available, despite
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* __GCC_HAVE_SYNC_COMPARE_AND_SWAP_8 not being defined (which means the
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* functions are defined in libgcc instead of being inlines).
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*/
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#undef JE_FORCE_SYNC_COMPARE_AND_SWAP_8
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/*
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* Defined if __builtin_clz() and __builtin_clzl() are available.
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*/
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#undef JEMALLOC_HAVE_BUILTIN_CLZ
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/*
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* Defined if os_unfair_lock_*() functions are available, as provided by Darwin.
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*/
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#undef JEMALLOC_OS_UNFAIR_LOCK
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/*
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* Defined if OSSpin*() functions are available, as provided by Darwin, and
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* documented in the spinlock(3) manual page.
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*/
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#undef JEMALLOC_OSSPIN
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/* Defined if syscall(2) is usable. */
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#undef JEMALLOC_USE_SYSCALL
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/*
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* Defined if secure_getenv(3) is available.
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*/
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#undef JEMALLOC_HAVE_SECURE_GETENV
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/*
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* Defined if issetugid(2) is available.
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*/
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#undef JEMALLOC_HAVE_ISSETUGID
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/* Defined if pthread_atfork(3) is available. */
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#undef JEMALLOC_HAVE_PTHREAD_ATFORK
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/*
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* Defined if clock_gettime(CLOCK_MONOTONIC_COARSE, ...) is available.
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*/
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#undef JEMALLOC_HAVE_CLOCK_MONOTONIC_COARSE
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/*
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* Defined if clock_gettime(CLOCK_MONOTONIC, ...) is available.
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*/
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#undef JEMALLOC_HAVE_CLOCK_MONOTONIC
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/*
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* Defined if mach_absolute_time() is available.
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*/
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#undef JEMALLOC_HAVE_MACH_ABSOLUTE_TIME
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/*
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* Defined if _malloc_thread_cleanup() exists. At least in the case of
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* FreeBSD, pthread_key_create() allocates, which if used during malloc
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* bootstrapping will cause recursion into the pthreads library. Therefore, if
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* _malloc_thread_cleanup() exists, use it as the basis for thread cleanup in
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* malloc_tsd.
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*/
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#undef JEMALLOC_MALLOC_THREAD_CLEANUP
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/*
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* Defined if threaded initialization is known to be safe on this platform.
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* Among other things, it must be possible to initialize a mutex without
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* triggering allocation in order for threaded allocation to be safe.
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*/
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#undef JEMALLOC_THREADED_INIT
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/*
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* Defined if the pthreads implementation defines
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* _pthread_mutex_init_calloc_cb(), in which case the function is used in order
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* to avoid recursive allocation during mutex initialization.
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*/
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#undef JEMALLOC_MUTEX_INIT_CB
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/* Non-empty if the tls_model attribute is supported. */
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#undef JEMALLOC_TLS_MODEL
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/*
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* JEMALLOC_DEBUG enables assertions and other sanity checks, and disables
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* inline functions.
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*/
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#undef JEMALLOC_DEBUG
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/* JEMALLOC_STATS enables statistics calculation. */
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#undef JEMALLOC_STATS
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/* JEMALLOC_PROF enables allocation profiling. */
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#undef JEMALLOC_PROF
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/* Use libunwind for profile backtracing if defined. */
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#undef JEMALLOC_PROF_LIBUNWIND
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/* Use libgcc for profile backtracing if defined. */
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#undef JEMALLOC_PROF_LIBGCC
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/* Use gcc intrinsics for profile backtracing if defined. */
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#undef JEMALLOC_PROF_GCC
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/*
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* JEMALLOC_DSS enables use of sbrk(2) to allocate extents from the data storage
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* segment (DSS).
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*/
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#undef JEMALLOC_DSS
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/* Support memory filling (junk/zero). */
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#undef JEMALLOC_FILL
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/* Support utrace(2)-based tracing. */
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#undef JEMALLOC_UTRACE
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/* Support optional abort() on OOM. */
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#undef JEMALLOC_XMALLOC
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/* Support lazy locking (avoid locking unless a second thread is launched). */
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#undef JEMALLOC_LAZY_LOCK
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/*
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* Minimum allocation alignment is 2^LG_QUANTUM bytes (ignoring tiny size
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* classes).
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*/
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#undef LG_QUANTUM
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/* One page is 2^LG_PAGE bytes. */
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#undef LG_PAGE
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/*
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* One huge page is 2^LG_HUGEPAGE bytes. Note that this is defined even if the
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* system does not explicitly support huge pages; system calls that require
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* explicit huge page support are separately configured.
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*/
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#undef LG_HUGEPAGE
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/*
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* If defined, adjacent virtual memory mappings with identical attributes
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* automatically coalesce, and they fragment when changes are made to subranges.
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* This is the normal order of things for mmap()/munmap(), but on Windows
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* VirtualAlloc()/VirtualFree() operations must be precisely matched, i.e.
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* mappings do *not* coalesce/fragment.
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*/
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#undef JEMALLOC_MAPS_COALESCE
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/*
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* If defined, use munmap() to unmap freed extents by default, rather than
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* storing them for later reuse. This is disabled on 64-bit Linux because
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* common sequences of mmap()/munmap() calls will cause virtual memory map
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* holes.
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*/
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#undef JEMALLOC_MUNMAP
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/* TLS is used to map arenas and magazine caches to threads. */
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#undef JEMALLOC_TLS
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/*
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* Used to mark unreachable code to quiet "end of non-void" compiler warnings.
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* Don't use this directly; instead use unreachable() from util.h
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*/
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#undef JEMALLOC_INTERNAL_UNREACHABLE
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/*
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* ffs*() functions to use for bitmapping. Don't use these directly; instead,
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* use ffs_*() from util.h.
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*/
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#undef JEMALLOC_INTERNAL_FFSLL
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#undef JEMALLOC_INTERNAL_FFSL
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#undef JEMALLOC_INTERNAL_FFS
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/*
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* If defined, explicitly attempt to more uniformly distribute large allocation
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* pointer alignments across all cache indices.
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*/
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#undef JEMALLOC_CACHE_OBLIVIOUS
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/*
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* Darwin (OS X) uses zones to work around Mach-O symbol override shortcomings.
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*/
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#undef JEMALLOC_ZONE
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/*
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* Methods for determining whether the OS overcommits.
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* JEMALLOC_PROC_SYS_VM_OVERCOMMIT_MEMORY: Linux's
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* /proc/sys/vm.overcommit_memory file.
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* JEMALLOC_SYSCTL_VM_OVERCOMMIT: FreeBSD's vm.overcommit sysctl.
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*/
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#undef JEMALLOC_SYSCTL_VM_OVERCOMMIT
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#undef JEMALLOC_PROC_SYS_VM_OVERCOMMIT_MEMORY
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/* Defined if madvise(2) is available. */
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#undef JEMALLOC_HAVE_MADVISE
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/*
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* Methods for purging unused pages differ between operating systems.
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*
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* madvise(..., MADV_FREE) : This marks pages as being unused, such that they
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* will be discarded rather than swapped out.
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* madvise(..., MADV_DONTNEED) : If JEMALLOC_PURGE_MADVISE_DONTNEED_ZEROS is
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* defined, this immediately discards pages,
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* such that new pages will be demand-zeroed if
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* the address region is later touched;
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* otherwise this behaves similarly to
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* MADV_FREE, though typically with higher
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* system overhead.
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*/
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#undef JEMALLOC_PURGE_MADVISE_FREE
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#undef JEMALLOC_PURGE_MADVISE_DONTNEED
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#undef JEMALLOC_PURGE_MADVISE_DONTNEED_ZEROS
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/*
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* Defined if transparent huge pages are supported via the MADV_[NO]HUGEPAGE
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* arguments to madvise(2).
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*/
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#undef JEMALLOC_THP
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/* Define if operating system has alloca.h header. */
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#undef JEMALLOC_HAS_ALLOCA_H
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/* C99 restrict keyword supported. */
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#undef JEMALLOC_HAS_RESTRICT
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/* For use by hash code. */
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#undef JEMALLOC_BIG_ENDIAN
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/* sizeof(int) == 2^LG_SIZEOF_INT. */
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#undef LG_SIZEOF_INT
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/* sizeof(long) == 2^LG_SIZEOF_LONG. */
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#undef LG_SIZEOF_LONG
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/* sizeof(long long) == 2^LG_SIZEOF_LONG_LONG. */
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#undef LG_SIZEOF_LONG_LONG
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/* sizeof(intmax_t) == 2^LG_SIZEOF_INTMAX_T. */
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#undef LG_SIZEOF_INTMAX_T
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/* glibc malloc hooks (__malloc_hook, __realloc_hook, __free_hook). */
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#undef JEMALLOC_GLIBC_MALLOC_HOOK
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/* glibc memalign hook. */
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#undef JEMALLOC_GLIBC_MEMALIGN_HOOK
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/* Adaptive mutex support in pthreads. */
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#undef JEMALLOC_HAVE_PTHREAD_MUTEX_ADAPTIVE_NP
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/* GNU specific sched_getcpu support */
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#undef JEMALLOC_HAVE_SCHED_GETCPU
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/*
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* If defined, jemalloc symbols are not exported (doesn't work when
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* JEMALLOC_PREFIX is not defined).
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*/
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#undef JEMALLOC_EXPORT
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/* config.malloc_conf options string. */
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#undef JEMALLOC_CONFIG_MALLOC_CONF
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/* If defined, jemalloc takes the malloc/free/etc. symbol names. */
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#undef JEMALLOC_IS_MALLOC
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#endif /* JEMALLOC_INTERNAL_DEFS_H_ */
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