--- old/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/shared/CollectedHeap.java	2019-02-11 13:25:50.875170469 +0100
+++ new/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/shared/CollectedHeap.java	2019-02-11 13:25:50.195170493 +0100
@@ -31,6 +31,8 @@
 import sun.jvm.hotspot.memory.*;
 import sun.jvm.hotspot.runtime.*;
 import sun.jvm.hotspot.types.*;
+import sun.jvm.hotspot.utilities.BitMapInterface;
+import sun.jvm.hotspot.utilities.BitMapSegmented;
 
 public abstract class CollectedHeap extends VMObject {
   private static long         reservedFieldOffset;
@@ -93,4 +95,8 @@
     tty.println("unknown subtype of CollectedHeap @ " + getAddress() + " (" +
                 mr.start() + "," + mr.end() + ")");
   }
+
+  public BitMapInterface createBitMap(long bits) {
+    return new BitMapSegmented(bits);
+  }
 }