--- old/src/share/vm/memory/genCollectedHeap.hpp	2015-04-01 13:06:08.987847653 +0200
+++ new/src/share/vm/memory/genCollectedHeap.hpp	2015-04-01 13:06:08.875847657 +0200
@@ -531,8 +531,8 @@
   void record_gen_tops_before_GC() PRODUCT_RETURN;
 
 protected:
-  virtual void gc_prologue(bool full);
-  virtual void gc_epilogue(bool full);
+  void gc_prologue(bool full);
+  void gc_epilogue(bool full);
 };
 
 #endif // SHARE_VM_MEMORY_GENCOLLECTEDHEAP_HPP