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comparison agent/src/share/classes/sun/jvm/hotspot/runtime/VirtualSpace.java @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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children c18cbe5936b8
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-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 2000-2002 Sun Microsystems, Inc. All Rights Reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 package sun.jvm.hotspot.runtime;
26
27 import java.util.*;
28 import sun.jvm.hotspot.debugger.*;
29 import sun.jvm.hotspot.types.*;
30
31 public class VirtualSpace extends VMObject {
32 private static AddressField lowField;
33 private static AddressField highField;
34 private static AddressField lowBoundaryField;
35 private static AddressField highBoundaryField;
36
37 static {
38 VM.registerVMInitializedObserver(new Observer() {
39 public void update(Observable o, Object data) {
40 initialize(VM.getVM().getTypeDataBase());
41 }
42 });
43 }
44
45 private static synchronized void initialize(TypeDataBase db) {
46 Type type = db.lookupType("VirtualSpace");
47
48 lowField = type.getAddressField("_low");
49 highField = type.getAddressField("_high");
50 lowBoundaryField = type.getAddressField("_low_boundary");
51 highBoundaryField = type.getAddressField("_high_boundary");
52 }
53
54 public VirtualSpace(Address addr) {
55 super(addr);
56 }
57
58 public Address low() { return lowField.getValue(addr); }
59 public Address high() { return highField.getValue(addr); }
60 public Address lowBoundary() { return lowBoundaryField.getValue(addr); }
61 public Address highBoundary() { return highBoundaryField.getValue(addr); }
62
63 /** Testers (all sizes are byte sizes) */
64 public long committedSize() { return high().minus(low()); }
65 public long reservedSize() { return highBoundary().minus(lowBoundary()); }
66 public long uncommittedSize() { return reservedSize() - committedSize(); }
67 public boolean contains(Address addr) { return (low().lessThanOrEqual(addr) && addr.lessThan(high())); }
68 }