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

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 2002-2007 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.ui;
26
27 import java.awt.*;
28 import java.io.*;
29 import javax.swing.*;
30 import java.util.*;
31
32 import sun.jvm.hotspot.memory.*;
33 import sun.jvm.hotspot.runtime.*;
34 import sun.jvm.hotspot.debugger.*;
35 import sun.jvm.hotspot.oops.*;
36
37 /** Provides information about monitor cache. */
38
39 public class MonitorCacheDumpPanel extends JPanel {
40 public MonitorCacheDumpPanel() {
41 super();
42
43 setLayout(new BorderLayout());
44
45 // Simple at first
46 JScrollPane scroller = new JScrollPane();
47 JTextArea textArea = new JTextArea();
48 textArea = new JTextArea();
49 textArea.setEditable(false);
50 textArea.setLineWrap(true);
51 textArea.setWrapStyleWord(true);
52 scroller.getViewport().add(textArea);
53 add(scroller, BorderLayout.CENTER);
54
55 ByteArrayOutputStream bos = new ByteArrayOutputStream();
56 PrintStream tty = new PrintStream(bos);
57 tty.println("Monitor Cache Dump (not including JVMTI raw monitors):");
58 tty.println();
59 dumpOn(tty);
60
61 textArea.setText(bos.toString());
62 }
63
64 private static void dumpMonitor(PrintStream tty, ObjectMonitor mon, boolean raw) {
65 tty.print("ObjectMonitor@" + mon.getAddress());
66 if (raw) tty.print("(Raw Monitor)");
67 tty.println();
68 tty.println(" _header: 0x" + Long.toHexString(mon.header().value()));
69 OopHandle obj = mon.object();
70 Oop oop = heap.newOop(obj);
71 tty.println(" _object: " + obj + ", a " + oop.getKlass().getName().asString());
72 Address owner = mon.owner();
73 tty.println(" _owner: " + owner);
74 if (!raw && owner != null) {
75 JavaThread thread = threads.owningThreadFromMonitor(mon);
76 if (thread != null) {
77 tty.println(" owning thread: " + thread.getThreadName());
78 if (!thread.getAddress().equals(owner)) {
79 if (!thread.isLockOwned(owner)) {
80 tty.println(" WARNING! _owner doesn't fall in " + thread +
81 "'s stack space");
82 }
83 }
84 }
85 }
86 tty.println(" _count: " + mon.count());
87 tty.println(" _waiters: " + mon.waiters());
88 tty.println(" _recursions: " + mon.recursions());
89 }
90
91 private void dumpOn(PrintStream tty) {
92 Iterator i = ObjectSynchronizer.objectMonitorIterator();
93 if (i == null) {
94 tty.println("This version of HotSpot VM doesn't support monitor cache dump.");
95 tty.println("You need 1.4.0_04, 1.4.1_01 or later versions");
96 return;
97 }
98 ObjectMonitor mon;
99 while (i.hasNext()) {
100 mon = (ObjectMonitor)i.next();
101 if (mon.count() != 0 || mon.waiters() != 0 || mon.owner() != null) {
102 OopHandle object = mon.object();
103 if (object == null) {
104 dumpMonitor(tty, mon, true);
105 } else {
106 dumpMonitor(tty, mon, false);
107 }
108 }
109 }
110 }
111
112 private static Threads threads = VM.getVM().getThreads();
113 private static ObjectHeap heap = VM.getVM().getObjectHeap();
114 }