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#include "jemalloc/internal/jemalloc_internal.h"
#ifndef JEMALLOC_ZONE
# error "This source file is for zones on Darwin (OS X)."
#endif
/******************************************************************************/
/* Data. */
static malloc_zone_t zone;
static struct malloc_introspection_t zone_introspect;
/******************************************************************************/
/* Function prototypes for non-inline static functions. */
static size_t zone_size(malloc_zone_t *zone, void *ptr);
static void *zone_malloc(malloc_zone_t *zone, size_t size);
static void *zone_calloc(malloc_zone_t *zone, size_t num, size_t size);
static void *zone_valloc(malloc_zone_t *zone, size_t size);
static void zone_free(malloc_zone_t *zone, void *ptr);
static void *zone_realloc(malloc_zone_t *zone, void *ptr, size_t size);
#if (JEMALLOC_ZONE_VERSION >= 5)
static void *zone_memalign(malloc_zone_t *zone, size_t alignment,
#endif
#if (JEMALLOC_ZONE_VERSION >= 6)
size_t size);
static void zone_free_definite_size(malloc_zone_t *zone, void *ptr,
size_t size);
#endif
static void *zone_destroy(malloc_zone_t *zone);
static size_t zone_good_size(malloc_zone_t *zone, size_t size);
static void zone_force_lock(malloc_zone_t *zone);
static void zone_force_unlock(malloc_zone_t *zone);
/******************************************************************************/
/*
* Functions.
*/
static size_t
zone_size(malloc_zone_t *zone, void *ptr)
{
/*
* There appear to be places within Darwin (such as setenv(3)) that
* cause calls to this function with pointers that *no* zone owns. If
* we knew that all pointers were owned by *some* zone, we could split
* our zone into two parts, and use one as the default allocator and
* the other as the default deallocator/reallocator. Since that will
* not work in practice, we must check all pointers to assure that they
* reside within a mapped chunk before determining size.
*/
return (ivsalloc(ptr));
}
static void *
zone_malloc(malloc_zone_t *zone, size_t size)
{
return (je_malloc(size));
}
static void *
zone_calloc(malloc_zone_t *zone, size_t num, size_t size)
{
return (je_calloc(num, size));
}
static void *
zone_valloc(malloc_zone_t *zone, size_t size)
{
void *ret = NULL; /* Assignment avoids useless compiler warning. */
je_posix_memalign(&ret, PAGE_SIZE, size);
return (ret);
}
static void
zone_free(malloc_zone_t *zone, void *ptr)
{
if (ivsalloc(ptr) != 0) {
je_free(ptr);
return;
}
free(ptr);
}
static void *
zone_realloc(malloc_zone_t *zone, void *ptr, size_t size)
{
if (ivsalloc(ptr) != 0)
return (je_realloc(ptr, size));
return (realloc(ptr, size));
}
#if (JEMALLOC_ZONE_VERSION >= 5)
static void *
zone_memalign(malloc_zone_t *zone, size_t alignment, size_t size)
{
void *ret = NULL; /* Assignment avoids useless compiler warning. */
je_posix_memalign(&ret, alignment, size);
return (ret);
}
#endif
#if (JEMALLOC_ZONE_VERSION >= 6)
static void
zone_free_definite_size(malloc_zone_t *zone, void *ptr, size_t size)
{
if (ivsalloc(ptr) != 0) {
assert(ivsalloc(ptr) == size);
je_free(ptr);
return;
}
free(ptr);
}
#endif
static void *
zone_destroy(malloc_zone_t *zone)
{
/* This function should never be called. */
assert(false);
return (NULL);
}
static size_t
zone_good_size(malloc_zone_t *zone, size_t size)
{
if (size == 0)
size = 1;
return (s2u(size));
}
static void
zone_force_lock(malloc_zone_t *zone)
{
if (isthreaded)
jemalloc_prefork();
}
static void
zone_force_unlock(malloc_zone_t *zone)
{
if (isthreaded)
jemalloc_postfork_parent();
}
void
register_zone(void)
{
zone.size = (void *)zone_size;
zone.malloc = (void *)zone_malloc;
zone.calloc = (void *)zone_calloc;
zone.valloc = (void *)zone_valloc;
zone.free = (void *)zone_free;
zone.realloc = (void *)zone_realloc;
zone.destroy = (void *)zone_destroy;
zone.zone_name = "jemalloc_zone";
zone.batch_malloc = NULL;
zone.batch_free = NULL;
zone.introspect = &zone_introspect;
zone.version = JEMALLOC_ZONE_VERSION;
#if (JEMALLOC_ZONE_VERSION >= 5)
zone.memalign = zone_memalign;
#endif
#if (JEMALLOC_ZONE_VERSION >= 6)
zone.free_definite_size = zone_free_definite_size;
#endif
#if (JEMALLOC_ZONE_VERSION >= 8)
zone.pressure_relief = NULL;
#endif
zone_introspect.enumerator = NULL;
zone_introspect.good_size = (void *)zone_good_size;
zone_introspect.check = NULL;
zone_introspect.print = NULL;
zone_introspect.log = NULL;
zone_introspect.force_lock = (void *)zone_force_lock;
zone_introspect.force_unlock = (void *)zone_force_unlock;
zone_introspect.statistics = NULL;
#if (JEMALLOC_ZONE_VERSION >= 6)
zone_introspect.zone_locked = NULL;
#endif
#if (JEMALLOC_ZONE_VERSION >= 7)
zone_introspect.enable_discharge_checking = NULL;
zone_introspect.disable_discharge_checking = NULL;
zone_introspect.discharge = NULL;
#ifdef __BLOCKS__
zone_introspect.enumerate_discharged_pointers = NULL;
#else
zone_introspect.enumerate_unavailable_without_blocks = NULL;
#endif
#endif
/* Register the custom zone. At this point it won't be the default. */
malloc_zone_register(&zone);
/*
* Unregister and reregister the default zone. On OSX >= 10.6,
* unregistering takes the last registered zone and places it at the
* location of the specified zone. Unregistering the default zone thus
* makes the last registered one the default. On OSX < 10.6,
* unregistering shifts all registered zones. The first registered zone
* then becomes the default.
*/
do {
malloc_zone_t *default_zone = malloc_default_zone();
malloc_zone_unregister(default_zone);
malloc_zone_register(default_zone);
} while (malloc_default_zone() != &zone);
}
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