--- old/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/z/ZCollectedHeap.java	2019-02-13 16:35:02.910271337 +0100
+++ new/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/z/ZCollectedHeap.java	2019-02-13 16:35:02.542271350 +0100
@@ -25,11 +25,13 @@
 package sun.jvm.hotspot.gc.z;
 
 import java.io.PrintStream;
+import java.util.Iterator;
 
 import sun.jvm.hotspot.debugger.Address;
 import sun.jvm.hotspot.debugger.OopHandle;
 import sun.jvm.hotspot.gc.shared.CollectedHeap;
 import sun.jvm.hotspot.gc.shared.CollectedHeapName;
+import sun.jvm.hotspot.gc.shared.LiveRegionsClosure;
 import sun.jvm.hotspot.runtime.VM;
 import sun.jvm.hotspot.runtime.VMObjectFactory;
 import sun.jvm.hotspot.types.Type;
@@ -39,7 +41,6 @@
 // Mirror class for ZCollectedHeap.
 
 public class ZCollectedHeap extends CollectedHeap {
-
     private static long zHeapFieldOffset;
 
     static {
@@ -119,6 +120,15 @@
         }
     }
 
+    @Override
+    public void liveRegionsIterate(LiveRegionsClosure closure) {
+        Iterator<ZPage> iter = heap().pageTable().activePagesIterator();
+        while (iter.hasNext()) {
+            ZPage page = iter.next();
+            closure.doLiveRegions(page);
+        }
+    }
+
     @Override
     public BitMapInterface createBitMap(long size) {
         // Ignores the size