--- old/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/shared/CollectedHeap.java	2018-06-08 19:45:38.785924013 +0200
+++ new/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/shared/CollectedHeap.java	2018-06-08 19:45:38.518912428 +0200
@@ -75,6 +75,14 @@
 
   public abstract CollectedHeapName kind();
 
+  public String oopAddressDescription(OopHandle handle) {
+      return handle.toString();
+  }
+
+  public OopHandle oop_load_at(OopHandle handle, long offset) {
+      return handle.getOopHandleAt(offset);
+  }
+
   public void print() { printOn(System.out); }
   public void printOn(PrintStream tty) {
     MemRegion mr = reservedRegion();