Provide zone_size function: free() uses it to find the zone pointer belongs to in order to call the corresponding zone_free function
@@ -41,8 +41,11 @@ extern malloc_zone_t* malloc_default_purgeable_zone(void) __attribute__((weak_im
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static size_t zone_size(malloc_zone_t* zone, const void* p) {
- UNUSED(zone); UNUSED(p);
- return 0; // as we cannot guarantee that `p` comes from us, just return 0
+ UNUSED(zone);
+ if (!mi_is_in_heap_region(p))
+ return 0; // not our pointer, bail out
+
+ return mi_usable_size(p);
}
static void* zone_malloc(malloc_zone_t* zone, size_t size) {
