--- old/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/epsilon/EpsilonHeap.java	2019-02-11 09:03:32.359718705 +0100
+++ new/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/epsilon/EpsilonHeap.java	2019-02-11 09:03:31.967718719 +0100
@@ -66,6 +66,16 @@
     return CollectedHeapName.EPSILON;
   }
 
+  @Override
+  public long capacity() {
+    return space.capacity();
+  }
+
+  @Override
+  public long used() {
+    return space.used();
+  }
+
   public ContiguousSpace space() {
     return space;
   }
--- old/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/shared/CollectedHeap.java	2019-02-11 09:03:32.883718687 +0100
+++ new/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/shared/CollectedHeap.java	2019-02-11 09:03:32.495718701 +0100
@@ -58,8 +58,8 @@
     return reservedRegion().start();
   }
 
-  public long capacity() { return 0; }
-  public long used()     { return 0; }
+  public abstract long capacity();
+  public abstract long used();
 
   public MemRegion reservedRegion() {
     return new MemRegion(addr.addOffsetTo(reservedFieldOffset));
--- old/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/shenandoah/ShenandoahHeap.java	2019-02-11 09:03:33.411718669 +0100
+++ new/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/shenandoah/ShenandoahHeap.java	2019-02-11 09:03:33.019718682 +0100
@@ -64,6 +64,12 @@
     }
 
     @Override
+    public long capacity() {
+    	// FIXME
+    	return 0;
+    }
+
+    @Override
     public long used() {
         return used.getValue(addr);
     }
--- old/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/z/ZCollectedHeap.java	2019-02-11 09:03:33.915718651 +0100
+++ new/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/z/ZCollectedHeap.java	2019-02-11 09:03:33.539718664 +0100
@@ -70,6 +70,16 @@
         super(addr);
     }
 
+    @Override
+    public long capacity() {
+        return heap().capacity();
+    }
+
+    @Override
+    public long used() {
+        return heap().used();
+    }
+
     public OopHandle oop_load_at(OopHandle handle, long offset) {
         assert(!VM.getVM().isCompressedOopsEnabled());