--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/agent/src/share/classes/sun/jvm/hotspot/runtime/VirtualSpace.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,68 @@
+/*
+ * Copyright 2000-2002 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.runtime;
+
+import java.util.*;
+import sun.jvm.hotspot.debugger.*;
+import sun.jvm.hotspot.types.*;
+
+public class VirtualSpace extends VMObject {
+  private static AddressField lowField;
+  private static AddressField highField;
+  private static AddressField lowBoundaryField;
+  private static AddressField highBoundaryField;
+
+  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("VirtualSpace");
+
+    lowField          = type.getAddressField("_low");
+    highField         = type.getAddressField("_high");
+    lowBoundaryField  = type.getAddressField("_low_boundary");
+    highBoundaryField = type.getAddressField("_high_boundary");
+  }
+
+  public VirtualSpace(Address addr) {
+    super(addr);
+  }
+
+  public Address low()                          { return lowField.getValue(addr);          }
+  public Address high()                         { return highField.getValue(addr);         }
+  public Address lowBoundary()                  { return lowBoundaryField.getValue(addr);  }
+  public Address highBoundary()                 { return highBoundaryField.getValue(addr); }
+
+  /** Testers (all sizes are byte sizes) */
+  public long committedSize()                   { return high().minus(low());                                    }
+  public long reservedSize()                    { return highBoundary().minus(lowBoundary());                    }
+  public long uncommittedSize()                 { return reservedSize() - committedSize();                       }
+  public boolean contains(Address addr)         { return (low().lessThanOrEqual(addr) && addr.lessThan(high())); }
+}