--- a/hotspot/src/share/vm/gc_implementation/parNew/parNewGeneration.hpp	Tue Feb 10 17:41:19 2015 -0500
+++ b/hotspot/src/share/vm/gc_implementation/parNew/parNewGeneration.hpp	Wed Feb 11 14:47:21 2015 +0100
@@ -333,6 +333,9 @@
   // references to live referent.
   DefNewGeneration::IsAliveClosure _is_alive_closure;
 
+  // GC tracer that should be used during collection.
+  ParNewTracer _gc_tracer;
+
   static oop real_forwardee_slow(oop obj);
   static void waste_some_time();
 
@@ -340,7 +343,7 @@
   // word being overwritten with a self-forwarding-pointer.
   void preserve_mark_if_necessary(oop obj, markOop m);
 
-  void handle_promotion_failed(GenCollectedHeap* gch, ParScanThreadStateSet& thread_state_set, ParNewTracer& gc_tracer);
+  void handle_promotion_failed(GenCollectedHeap* gch, ParScanThreadStateSet& thread_state_set);
 
  protected:
 
@@ -411,6 +414,10 @@
     return _plab_stats.desired_plab_sz();
   }
 
+  const ParNewTracer* gc_tracer() const {
+    return &_gc_tracer;
+  }
+
   static oop real_forwardee(oop obj);
 
   DEBUG_ONLY(static bool is_legal_forward_ptr(oop p);)