--- old/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/g1/HeapRegionManager.java	2017-08-31 23:38:13.601744216 +0900
+++ new/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/g1/HeapRegionManager.java	2017-08-31 23:38:13.478743811 +0900
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2011, 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2011, 2017, 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
@@ -85,4 +85,8 @@
     public HeapRegionManager(Address addr) {
         super(addr);
     }
+
+    public HeapRegion addrToRegion(Address addr) {
+      return regions().getByAddress(addr);
+    }
 }