--- a/hotspot/src/share/vm/gc/g1/g1CollectedHeap.hpp	Mon Oct 26 12:22:24 2015 -0400
+++ b/hotspot/src/share/vm/gc/g1/g1CollectedHeap.hpp	Wed Oct 14 14:51:10 2015 +0200
@@ -728,7 +728,10 @@
   bool do_collection_pause_at_safepoint(double target_pause_time_ms);
 
   // Actually do the work of evacuating the collection set.
-  void evacuate_collection_set(EvacuationInfo& evacuation_info, G1ParScanThreadStateSet* per_thread_states);
+  virtual void evacuate_collection_set(EvacuationInfo& evacuation_info, G1ParScanThreadStateSet* per_thread_states);
+
+  void pre_evacuate_collection_set();
+  void post_evacuate_collection_set(EvacuationInfo& evacuation_info, G1ParScanThreadStateSet* pss);
 
   // Print the header for the per-thread termination statistics.
   static void print_termination_stats_hdr(outputStream* const st);