--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/agent/src/share/classes/sun/jvm/hotspot/memory/ConcurrentMarkSweepGeneration.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,81 @@
+/*
+ * Copyright 2003 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+package sun.jvm.hotspot.memory;
+
+import java.io.*;
+import java.util.*;
+import sun.jvm.hotspot.debugger.*;
+import sun.jvm.hotspot.runtime.*;
+import sun.jvm.hotspot.types.*;
+
+public class ConcurrentMarkSweepGeneration extends CardGeneration {
+  private static AddressField cmsSpaceField;
+
+  public ConcurrentMarkSweepGeneration(Address addr) {
+    super(addr);
+  }
+
+  static {
+    VM.registerVMInitializedObserver(new Observer() {
+        public void update(Observable o, Object data) {
+          initialize(VM.getVM().getTypeDataBase());
+        }
+      });
+  }
+
+  private static synchronized void initialize(TypeDataBase db) {
+    Type type = db.lookupType("ConcurrentMarkSweepGeneration");
+    cmsSpaceField = type.getAddressField("_cmsSpace");
+  }
+
+  // Accessing space
+  public CompactibleFreeListSpace cmsSpace() {
+    return (CompactibleFreeListSpace) VMObjectFactory.newObject(
+                                 CompactibleFreeListSpace.class,
+                                 cmsSpaceField.getValue(addr));
+  }
+
+  public long capacity()                { return cmsSpace().capacity(); }
+  public long used()                    { return cmsSpace().used(); }
+  public long free()                    { return cmsSpace().free(); }
+  public long contiguousAvailable()     { throw new RuntimeException("not yet implemented"); }
+  public boolean contains(Address p)    { return cmsSpace().contains(p); }
+  public void spaceIterate(SpaceClosure blk, boolean usedOnly) {
+     blk.doSpace(cmsSpace());
+  }
+
+  public Generation.Name kind() {
+    return Generation.Name.CONCURRENT_MARK_SWEEP;
+  }
+
+  public String name() {
+    return "concurrent mark-sweep generation";
+  }
+
+  public void printOn(PrintStream tty) {
+    tty.println(name());
+    cmsSpace().printOn(tty);
+  }
+}