--- old/src/hotspot/share/runtime/jniHandles.hpp	2017-11-02 08:30:11.000000000 +0100
+++ new/src/hotspot/share/runtime/jniHandles.hpp	2017-11-02 08:30:11.000000000 +0100
@@ -82,6 +82,7 @@
   // Weak global handles
   static jobject make_weak_global(Handle obj);
   static void destroy_weak_global(jobject handle);
+  static bool is_global_weak_cleared(jweak handle); // Test jweak without resolution
 
   // Sentinel marking deleted handles in block. Note that we cannot store NULL as
   // the sentinel, since clearing weak global JNI refs are done by storing NULL in