src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/z/ZCollectedHeap.java

@@ -32,10 +32,11 @@
 import sun.jvm.hotspot.gc.shared.CollectedHeapName;
 import sun.jvm.hotspot.runtime.VM;
 import sun.jvm.hotspot.runtime.VMObjectFactory;
 import sun.jvm.hotspot.types.Type;
 import sun.jvm.hotspot.types.TypeDataBase;
+import sun.jvm.hotspot.utilities.BitMapInterface;
 
 // Mirror class for ZCollectedHeap.
 
 public class ZCollectedHeap extends CollectedHeap {
 

@@ -115,6 +116,12 @@
             return origOop + " (" + loadBarrieredOop.toString() + ")";
         } else {
             return handle.toString();
         }
     }
+
+    @Override
+    public BitMapInterface createBitMap(long size) {
+        // Ignores the size
+        return new ZExternalBitMap(this);
+    }
 }