--- old/src/hotspot/share/code/codeBlob.hpp	Thu Mar 29 19:50:52 2018
+++ new/src/hotspot/share/code/codeBlob.hpp	Thu Mar 29 19:50:51 2018
@@ -132,6 +132,7 @@
   virtual bool is_exception_stub() const              { return false; }
   virtual bool is_safepoint_stub() const              { return false; }
   virtual bool is_adapter_blob() const                { return false; }
+  virtual bool is_vtable_blob() const                 { return false; }
   virtual bool is_method_handles_adapter_blob() const { return false; }
   virtual bool is_aot() const                         { return false; }
   virtual bool is_compiled() const                    { return false; }
@@ -380,6 +381,7 @@
 class BufferBlob: public RuntimeBlob {
   friend class VMStructs;
   friend class AdapterBlob;
+  friend class VtableBlob;
   friend class MethodHandlesAdapterBlob;
   friend class WhiteBox;
 
@@ -425,7 +427,19 @@
   virtual bool is_adapter_blob() const { return true; }
 };
 
+//---------------------------------------------------------------------------------------------------
+class VtableBlob: public BufferBlob {
+private:
+  VtableBlob(const char*, int);
 
+public:
+  // Creation
+  static VtableBlob* create(const char* name, int buffer_size);
+
+  // Typing
+  virtual bool is_vtable_blob() const { return true; }
+}; 
+
 //----------------------------------------------------------------------------------------------------
 // MethodHandlesAdapterBlob: used to hold MethodHandles adapters