--- old/src/hotspot/share/code/vtableStubs.cpp	Thu Mar 29 19:50:55 2018
+++ new/src/hotspot/share/code/vtableStubs.cpp	Thu Mar 29 19:50:54 2018
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -60,7 +60,7 @@
 
    // There is a dependency on the name of the blob in src/share/vm/prims/jvmtiCodeBlobEvents.cpp
    // If changing the name, update the other file accordingly.
-    BufferBlob* blob = BufferBlob::create("vtable chunks", bytes);
+    VtableBlob* blob = VtableBlob::create("vtable chunks", bytes);
     if (blob == NULL) {
       return NULL;
     }
@@ -177,6 +177,17 @@
   return s == stub;
 }
 
+VtableStub* VtableStubs::entry_point(address pc) {
+  MutexLocker ml(VtableStubs_lock);
+  VtableStub* stub = (VtableStub*)(pc - VtableStub::entry_offset());
+  uint hash = VtableStubs::hash(stub->is_vtable_stub(), stub->index());
+  VtableStub* s;
+  for (s = _table[hash]; s != NULL && s != stub; s = s->next()) {}
+  if (s == stub) {
+    return s;
+  }
+  return NULL;
+}
 
 bool VtableStubs::contains(address pc) {
   // simple solution for now - we may want to use