-void (*__free_hook)() = check_free;
-void *(*__malloc_hook)() = check_malloc;
-void *(*__realloc_hook)() = check_realloc;
+void (*__free_hook)(void *) = check_free;
+void *(*__malloc_hook)(size_t) = check_malloc;
+void *(*__realloc_hook)(void *, size_t) = check_realloc;