41           initialize(VM.getVM().getTypeDataBase());
  42         }
  43       });
  44   }
  45 
  46   private static synchronized void initialize(TypeDataBase db) {
  47     Type type = db.lookupType("CollectedHeap");
  48 
  49     reservedFieldOffset = type.getField("_reserved").getOffset();
  50   }
  51 
  52   public CollectedHeap(Address addr) {
  53     super(addr);
  54   }
  55 
  56   /** Returns the lowest address of the heap. */
  57   public Address start() {
  58     return reservedRegion().start();
  59   }
  60 
  61   public long capacity() { return 0; }
  62   public long used()     { return 0; }
  63 
  64   public MemRegion reservedRegion() {
  65     return new MemRegion(addr.addOffsetTo(reservedFieldOffset));
  66   }
  67 
  68   public boolean isIn(Address a) {
  69     return isInReserved(a);
  70   }
  71 
  72   public boolean isInReserved(Address a) {
  73     return reservedRegion().contains(a);
  74   }
  75 
  76   public abstract CollectedHeapName kind();
  77 
  78   public String oopAddressDescription(OopHandle handle) {
  79       return handle.toString();
  80   }
  81 
  82   public OopHandle oop_load_at(OopHandle handle, long offset) {

  41           initialize(VM.getVM().getTypeDataBase());
  42         }
  43       });
  44   }
  45 
  46   private static synchronized void initialize(TypeDataBase db) {
  47     Type type = db.lookupType("CollectedHeap");
  48 
  49     reservedFieldOffset = type.getField("_reserved").getOffset();
  50   }
  51 
  52   public CollectedHeap(Address addr) {
  53     super(addr);
  54   }
  55 
  56   /** Returns the lowest address of the heap. */
  57   public Address start() {
  58     return reservedRegion().start();
  59   }
  60 
  61   public abstract long capacity();
  62   public abstract long used();
  63 
  64   public MemRegion reservedRegion() {
  65     return new MemRegion(addr.addOffsetTo(reservedFieldOffset));
  66   }
  67 
  68   public boolean isIn(Address a) {
  69     return isInReserved(a);
  70   }
  71 
  72   public boolean isInReserved(Address a) {
  73     return reservedRegion().contains(a);
  74   }
  75 
  76   public abstract CollectedHeapName kind();
  77 
  78   public String oopAddressDescription(OopHandle handle) {
  79       return handle.toString();
  80   }
  81 
  82   public OopHandle oop_load_at(OopHandle handle, long offset) {