--- a/hotspot/src/share/vm/gc/g1/g1CollectorPolicy.hpp	Fri Oct 30 10:15:06 2015 +0100
+++ b/hotspot/src/share/vm/gc/g1/g1CollectorPolicy.hpp	Sat Oct 31 15:27:48 2015 +0100
@@ -549,6 +549,8 @@
 
   void init();
 
+  virtual void note_gc_start(uint num_active_workers);
+
   // Create jstat counters for the policy.
   virtual void initialize_gc_policy_counters();