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b=493541 hook jemalloc into glibc's malloc r=bsmedberg

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This commit is contained in:
Karl Tomlinson 2009-07-30 15:15:50 +12:00
parent 6c0e1d9ace
commit 77be8894d4
1 changed files with 27 additions and 0 deletions
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27
memory/jemalloc/jemalloc.c
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@ -7069,6 +7069,10 @@ _malloc_postfork(void)
*/
/******************************************************************************/
#ifdef HAVE_LIBDL
# include <dlfcn.h>
#endif
#ifdef MOZ_MEMORY_DARWIN
static malloc_zone_t zone;
static struct malloc_introspection_t zone_introspect;
@ -7229,4 +7233,27 @@ jemalloc_darwin_init(void)
sizeof(malloc_zone_t *) * (malloc_num_zones - 1));
malloc_zones[0] = &zone;
}
#elif defined(__GLIBC__) && !defined(__UCLIBC__)
/*
* glibc provides the RTLD_DEEPBIND flag for dlopen which can make it possible
* to inconsistently reference libc's malloc(3)-compatible functions
* (bug 493541).
*
* These definitions interpose hooks in glibc. The functions are actually
* passed an extra argument for the caller return address, which will be
* ignored.
*/
void (*__free_hook)(void *ptr) = free;
void *(*__malloc_hook)(size_t size) = malloc;
void *(*__realloc_hook)(void *ptr, size_t size) = realloc;
void *(*__memalign_hook)(size_t alignment, size_t size) = memalign;
#elif defined(RTLD_DEEPBIND)
/*
* XXX On systems that support RTLD_GROUP or DF_1_GROUP, do their
* implementations permit similar inconsistencies? Should STV_SINGLETON
* visibility be used for interposition where available?
*/
# error "Interposing malloc is unsafe on this system without libc malloc hooks."
#endif