diff -r 382d0689141c -r be6025ebffea hotspot/src/share/vm/gc/shared/referenceProcessor.hpp
--- a/hotspot/src/share/vm/gc/shared/referenceProcessor.hpp	Thu Dec 10 23:02:31 2015 +0000
+++ b/hotspot/src/share/vm/gc/shared/referenceProcessor.hpp	Thu Dec 10 14:57:55 2015 +0100
@@ -364,7 +364,9 @@
   void clear_discovered_references(DiscoveredList& refs_list);
 
   // Calculate the number of jni handles.
-  unsigned int count_jni_refs();
+  size_t count_jni_refs();
+
+  void log_reflist_counts(DiscoveredList ref_lists[], size_t total_count) PRODUCT_RETURN;
 
   // Balances reference queues.
   void balance_queues(DiscoveredList ref_lists[]);