--- old/src/share/vm/gc/shared/referenceProcessor.hpp	2016-04-11 15:33:35.738789642 +0200
+++ new/src/share/vm/gc/shared/referenceProcessor.hpp	2016-04-11 15:33:35.602784444 +0200
@@ -412,6 +412,9 @@
   // Discover a Reference object, using appropriate discovery criteria
   bool discover_reference(oop obj, ReferenceType rt);
 
+  // Has discovered references that need handling
+  bool has_discovered_references();
+
   // Process references found during GC (called by the garbage collector)
   ReferenceProcessorStats
   process_discovered_references(BoolObjectClosure*           is_alive,