Comment 46 for bug 333127

Comment on attachment 386469
hook jemalloc into glibc's malloc (without __malloc_initialize_hook)

(In reply to comment #17)
> I don't understand the "elif !defined(malloc) bit here... can you explain the
> purpose of that clause?

I saw this code

/* Mangle standard interfaces on Darwin and Windows CE,
   in order to avoid linking problems. */
#if defined(MOZ_MEMORY_DARWIN)
#define malloc(a) moz_malloc(a)
#define valloc(a) moz_valloc(a)
#define calloc(a, b) moz_calloc(a, b)
#define realloc(a, b) moz_realloc(a, b)
#define free(a) moz_free(a)
#endif

http://hg.mozilla.org/mozilla-central/annotate/55955ee71c10/memory/jemalloc/jemalloc.c#l6126

and assumed that in some cases jemalloc does not replace the system malloc but
is used as an alternative allocator in parallel to the system malloc (used
only in cases where mixing of allocate/free implementations can be avoided).