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comparison agent/src/share/classes/sun/jvm/hotspot/oops/InstanceMirrorKlass.java @ 2411:63997f575155

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7031614: jmap -permstat fails with java.lang.InternalError in sun.jvm.hotspot.oops.OopField.getValue Reviewed-by: kvn, dcubed
author never
date Wed, 30 Mar 2011 07:47:19 -0700
parents
children da91efe96a93
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2410:fe1dbd98e18f 2411:63997f575155
1 /*
2 * Copyright (c) 2011, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 package sun.jvm.hotspot.oops;
26
27 import java.io.*;
28 import java.util.*;
29 import sun.jvm.hotspot.debugger.*;
30 import sun.jvm.hotspot.memory.*;
31 import sun.jvm.hotspot.runtime.*;
32 import sun.jvm.hotspot.types.*;
33 import sun.jvm.hotspot.utilities.*;
34
35 // An InstanceKlass is the VM level representation of a Java class.
36
37 public class InstanceMirrorKlass extends InstanceKlass {
38 static {
39 VM.registerVMInitializedObserver(new Observer() {
40 public void update(Observable o, Object data) {
41 initialize(VM.getVM().getTypeDataBase());
42 }
43 });
44 }
45
46 private static synchronized void initialize(TypeDataBase db) throws WrongTypeException {
47 // Just make sure it's there for now
48 Type type = db.lookupType("instanceMirrorKlass");
49 }
50
51 InstanceMirrorKlass(OopHandle handle, ObjectHeap heap) {
52 super(handle, heap);
53 }
54
55 public long getObjectSize(Oop o) {
56 return java_lang_Class.getOopSize(o) * VM.getVM().getAddressSize();
57 }
58
59 public void iterateNonStaticFields(OopVisitor visitor, Oop obj) {
60 super.iterateNonStaticFields(visitor, obj);
61 // Fetch the real klass from the mirror object
62 Klass klass = java_lang_Class.asKlass(obj);
63 if (klass instanceof InstanceKlass) {
64 ((InstanceKlass)klass).iterateStaticFields(visitor);
65 }
66 }
67 }