--- old/src/hotspot/share/gc/z/zAddress.inline.hpp	2018-10-31 15:02:20.166658820 +0100
+++ new/src/hotspot/share/gc/z/zAddress.inline.hpp	2018-10-31 15:02:19.735640105 +0100
@@ -74,6 +74,10 @@
   return value & ZAddressMetadataFinalizable;
 }
 
+inline bool ZAddress::is_finalizable_good(uintptr_t value) {
+  return is_finalizable(value) && is_good(value ^ ZAddressMetadataFinalizable);
+}
+
 inline bool ZAddress::is_remapped(uintptr_t value) {
   return value & ZAddressMetadataRemapped;
 }