5b3db098f7
It turns out some OSX system libraries (like CoreGraphics on 10.6) like to call malloc_zone_* functions, but giving them pointers that weren't allocated with the zone they are using. Possibly, they do malloc_zone_malloc(malloc_default_zone()) before we register the jemalloc zone, and malloc_zone_realloc(malloc_default_zone()) after. malloc_default_zone() returning a different value in both cases.
211 lines
4.9 KiB
C
211 lines
4.9 KiB
C
#include "jemalloc/internal/jemalloc_internal.h"
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#ifndef JEMALLOC_ZONE
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# error "This source file is for zones on Darwin (OS X)."
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#endif
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/******************************************************************************/
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/* Data. */
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static malloc_zone_t zone;
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static struct malloc_introspection_t zone_introspect;
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/******************************************************************************/
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/* Function prototypes for non-inline static functions. */
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static size_t zone_size(malloc_zone_t *zone, void *ptr);
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static void *zone_malloc(malloc_zone_t *zone, size_t size);
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static void *zone_calloc(malloc_zone_t *zone, size_t num, size_t size);
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static void *zone_valloc(malloc_zone_t *zone, size_t size);
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static void zone_free(malloc_zone_t *zone, void *ptr);
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static void *zone_realloc(malloc_zone_t *zone, void *ptr, size_t size);
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#if (JEMALLOC_ZONE_VERSION >= 5)
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static void *zone_memalign(malloc_zone_t *zone, size_t alignment,
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#endif
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#if (JEMALLOC_ZONE_VERSION >= 6)
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size_t size);
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static void zone_free_definite_size(malloc_zone_t *zone, void *ptr,
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size_t size);
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#endif
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static void *zone_destroy(malloc_zone_t *zone);
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static size_t zone_good_size(malloc_zone_t *zone, size_t size);
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static void zone_force_lock(malloc_zone_t *zone);
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static void zone_force_unlock(malloc_zone_t *zone);
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/******************************************************************************/
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/*
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* Functions.
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*/
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static size_t
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zone_size(malloc_zone_t *zone, void *ptr)
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{
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/*
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* There appear to be places within Darwin (such as setenv(3)) that
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* cause calls to this function with pointers that *no* zone owns. If
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* we knew that all pointers were owned by *some* zone, we could split
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* our zone into two parts, and use one as the default allocator and
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* the other as the default deallocator/reallocator. Since that will
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* not work in practice, we must check all pointers to assure that they
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* reside within a mapped chunk before determining size.
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*/
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return (ivsalloc(ptr));
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}
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static void *
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zone_malloc(malloc_zone_t *zone, size_t size)
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{
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return (je_malloc(size));
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}
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static void *
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zone_calloc(malloc_zone_t *zone, size_t num, size_t size)
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{
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return (je_calloc(num, size));
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}
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static void *
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zone_valloc(malloc_zone_t *zone, size_t size)
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{
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void *ret = NULL; /* Assignment avoids useless compiler warning. */
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je_posix_memalign(&ret, PAGE_SIZE, size);
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return (ret);
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}
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static void
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zone_free(malloc_zone_t *zone, void *ptr)
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{
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if (ivsalloc(ptr) != 0) {
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je_free(ptr);
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return;
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}
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free(ptr);
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}
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static void *
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zone_realloc(malloc_zone_t *zone, void *ptr, size_t size)
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{
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if (ivsalloc(ptr) != 0)
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return (je_realloc(ptr, size));
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return (realloc(ptr, size));
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}
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#if (JEMALLOC_ZONE_VERSION >= 5)
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static void *
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zone_memalign(malloc_zone_t *zone, size_t alignment, size_t size)
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{
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void *ret = NULL; /* Assignment avoids useless compiler warning. */
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je_posix_memalign(&ret, alignment, size);
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return (ret);
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}
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#endif
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#if (JEMALLOC_ZONE_VERSION >= 6)
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static void
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zone_free_definite_size(malloc_zone_t *zone, void *ptr, size_t size)
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{
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if (ivsalloc(ptr) != 0) {
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assert(ivsalloc(ptr) == size);
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je_free(ptr);
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return;
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}
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free(ptr);
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}
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#endif
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static void *
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zone_destroy(malloc_zone_t *zone)
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{
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/* This function should never be called. */
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assert(false);
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return (NULL);
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}
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static size_t
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zone_good_size(malloc_zone_t *zone, size_t size)
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{
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if (size == 0)
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size = 1;
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return (s2u(size));
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}
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static void
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zone_force_lock(malloc_zone_t *zone)
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{
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if (isthreaded)
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jemalloc_prefork();
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}
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static void
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zone_force_unlock(malloc_zone_t *zone)
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{
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if (isthreaded)
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jemalloc_postfork_parent();
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}
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malloc_zone_t *
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create_zone(void)
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{
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zone.size = (void *)zone_size;
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zone.malloc = (void *)zone_malloc;
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zone.calloc = (void *)zone_calloc;
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zone.valloc = (void *)zone_valloc;
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zone.free = (void *)zone_free;
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zone.realloc = (void *)zone_realloc;
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zone.destroy = (void *)zone_destroy;
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zone.zone_name = "jemalloc_zone";
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zone.batch_malloc = NULL;
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zone.batch_free = NULL;
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zone.introspect = &zone_introspect;
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zone.version = JEMALLOC_ZONE_VERSION;
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#if (JEMALLOC_ZONE_VERSION >= 5)
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zone.memalign = zone_memalign;
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#endif
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#if (JEMALLOC_ZONE_VERSION >= 6)
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zone.free_definite_size = zone_free_definite_size;
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#endif
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#if (JEMALLOC_ZONE_VERSION >= 8)
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zone.pressure_relief = NULL;
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#endif
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zone_introspect.enumerator = NULL;
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zone_introspect.good_size = (void *)zone_good_size;
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zone_introspect.check = NULL;
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zone_introspect.print = NULL;
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zone_introspect.log = NULL;
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zone_introspect.force_lock = (void *)zone_force_lock;
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zone_introspect.force_unlock = (void *)zone_force_unlock;
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zone_introspect.statistics = NULL;
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#if (JEMALLOC_ZONE_VERSION >= 6)
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zone_introspect.zone_locked = NULL;
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#endif
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#if (JEMALLOC_ZONE_VERSION >= 7)
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zone_introspect.enable_discharge_checking = NULL;
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zone_introspect.disable_discharge_checking = NULL;
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zone_introspect.discharge = NULL;
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#ifdef __BLOCKS__
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zone_introspect.enumerate_discharged_pointers = NULL;
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#else
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zone_introspect.enumerate_unavailable_without_blocks = NULL;
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#endif
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#endif
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return (&zone);
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}
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