+/* may be changed as long as `allow_customize' is set */
+static void *(*malloc_locked_func)(size_t) = malloc;
+static void (*free_locked_func)(void *) = free;
+static void *(*malloc_func)(size_t) = malloc;
+static void *(*realloc_func)(void *, size_t)= realloc;
+static void (*free_func)(void *) = free;
+
+/* may be changed as long as `allow_customize_debug' is set */
+/* XXX use correct function pointer types */