*** old/src/share/vm/oops/klass.hpp	Thu Aug 15 09:53:22 2013
--- new/src/share/vm/oops/klass.hpp	Thu Aug 15 09:53:20 2013

*** 701,710 ****
--- 701,720 ----
    void verify_vtable_index(int index);
  #endif
  
    virtual void oop_verify_on(oop obj, outputStream* st);
  
+   static bool is_null(narrowKlass obj);
+   static bool is_null(Klass* obj);
+ 
+   // klass encoding for klass pointer in objects.
+   static narrowKlass encode_klass_not_null(Klass* v);
+   static narrowKlass encode_klass(Klass* v);
+ 
+   static Klass* decode_klass_not_null(narrowKlass v);
+   static Klass* decode_klass(narrowKlass v);
+ 
   private:
    // barriers used by klass_oop_store
    void klass_update_barrier_set(oop v);
    void klass_update_barrier_set_pre(void* p, oop v);
  };