--- a/hotspot/src/share/vm/gc/shared/referenceProcessor.hpp	Thu Apr 14 08:30:15 2016 +0200
+++ b/hotspot/src/share/vm/gc/shared/referenceProcessor.hpp	Thu Apr 14 08:30:37 2016 +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,