/* Forward declarations.  */
static void *malloc_hook_ini (size_t sz,
                              const void *caller) __THROW;
static void *realloc_hook_ini (void *ptr, size_t sz,
                               const void *caller) __THROW;
static void *memalign_hook_ini (size_t alignment, size_t sz,
                                const void *caller) __THROW;

#if HAVE_MALLOC_INIT_HOOK
void weak_variable (*__malloc_initialize_hook) (void) = NULL;
compat_symbol (libc, __malloc_initialize_hook,
	       __malloc_initialize_hook, GLIBC_2_0);
#endif

void weak_variable (*__free_hook) (void *__ptr,
                                   const void *) = NULL;
void *weak_variable (*__malloc_hook)
  (size_t __size, const void *) = malloc_hook_ini;
void *weak_variable (*__realloc_hook)
  (void *__ptr, size_t __size, const void *)
  = realloc_hook_ini;
void *weak_variable (*__memalign_hook)
  (size_t __alignment, size_t __size, const void *)
  = memalign_hook_ini;
void weak_variable (*__after_morecore_hook) (void) = NULL;

pwndbg> x/64gx  0x7fffff3ebc00
0x7fffff3ebc00 <_IO_wide_data_0+288>:   0x0000000000000000      0x0000000000000000
0x7fffff3ebc10 <_IO_wide_data_0+304>:   0x00007fffff3e7d60      0x0000000000000000
0x7fffff3ebc20 <__memalign_hook>:       0x00007fffff097410      0x00007fffff098790
0x7fffff3ebc30 <__malloc_hook>: 0x00007fffff096a40      0x0000000000000000
0x7fffff3ebc40 <main_arena>:    0x0000000000000000      0x0000000000000000