--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/agent/src/share/classes/sun/jvm/hotspot/gc_implementation/g1/G1CollectedHeap.java	Tue Sep 20 09:59:59 2011 -0400
@@ -0,0 +1,107 @@
+/*
+ * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+package sun.jvm.hotspot.gc_implementation.g1;
+
+import java.util.Iterator;
+import java.util.Observable;
+import java.util.Observer;
+
+import sun.jvm.hotspot.debugger.Address;
+import sun.jvm.hotspot.gc_interface.CollectedHeapName;
+import sun.jvm.hotspot.memory.MemRegion;
+import sun.jvm.hotspot.memory.SharedHeap;
+import sun.jvm.hotspot.memory.SpaceClosure;
+import sun.jvm.hotspot.runtime.VM;
+import sun.jvm.hotspot.runtime.VMObjectFactory;
+import sun.jvm.hotspot.types.CIntegerField;
+import sun.jvm.hotspot.types.Type;
+import sun.jvm.hotspot.types.TypeDataBase;
+
+// Mirror class for G1CollectedHeap.
+
+public class G1CollectedHeap extends SharedHeap {
+    // HeapRegionSeq _seq;
+    static private long hrsFieldOffset;
+    // MemRegion _g1_committed;
+    static private long g1CommittedFieldOffset;
+    // size_t _summary_bytes_used;
+    static private CIntegerField summaryBytesUsedField;
+
+    static {
+        VM.registerVMInitializedObserver(new Observer() {
+                public void update(Observable o, Object data) {
+                    initialize(VM.getVM().getTypeDataBase());
+                }
+            });
+    }
+
+    static private synchronized void initialize(TypeDataBase db) {
+        Type type = db.lookupType("G1CollectedHeap");
+
+        hrsFieldOffset = type.getField("_hrs").getOffset();
+        g1CommittedFieldOffset = type.getField("_g1_committed").getOffset();
+        summaryBytesUsedField = type.getCIntegerField("_summary_bytes_used");
+    }
+
+    public long capacity() {
+        Address g1CommittedAddr = addr.addOffsetTo(g1CommittedFieldOffset);
+        MemRegion g1_committed = new MemRegion(g1CommittedAddr);
+        return g1_committed.byteSize();
+    }
+
+    public long used() {
+        return summaryBytesUsedField.getValue(addr);
+    }
+
+    public long n_regions() {
+        return hrs().length();
+    }
+
+    private HeapRegionSeq hrs() {
+        Address hrsAddr = addr.addOffsetTo(hrsFieldOffset);
+        return (HeapRegionSeq) VMObjectFactory.newObject(HeapRegionSeq.class,
+                                                         hrsAddr);
+    }
+
+    private Iterator<HeapRegion> heapRegionIterator() {
+        return hrs().heapRegionIterator();
+    }
+
+    public void heapRegionIterate(SpaceClosure scl) {
+        Iterator<HeapRegion> iter = heapRegionIterator();
+        while (iter.hasNext()) {
+            HeapRegion hr = iter.next();
+            scl.doSpace(hr);
+        }
+    }
+
+    public CollectedHeapName kind() {
+        return CollectedHeapName.G1_COLLECTED_HEAP;
+    }
+
+    public G1CollectedHeap(Address addr) {
+        super(addr);
+    }
+}