src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/shared/CollectedHeap.java

*** 56,67 ****
    /** Returns the lowest address of the heap. */
    public Address start() {
      return reservedRegion().start();
    }
  
!   public long capacity() { return 0; }
!   public long used()     { return 0; }
  
    public MemRegion reservedRegion() {
      return new MemRegion(addr.addOffsetTo(reservedFieldOffset));
    }
  
--- 56,67 ----
    /** Returns the lowest address of the heap. */
    public Address start() {
      return reservedRegion().start();
    }
  
!   public abstract long capacity();
!   public abstract long used();
  
    public MemRegion reservedRegion() {
      return new MemRegion(addr.addOffsetTo(reservedFieldOffset));
    }