Mercurial > hg > truffle
diff agent/src/share/classes/sun/jvm/hotspot/ui/MonitorCacheDumpPanel.java @ 0:a61af66fc99e jdk7-b24
Initial load
author | duke |
---|---|
date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c18cbe5936b8 |
line wrap: on
line diff
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/src/share/classes/sun/jvm/hotspot/ui/MonitorCacheDumpPanel.java Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,114 @@ +/* + * Copyright 2002-2007 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.ui; + +import java.awt.*; +import java.io.*; +import javax.swing.*; +import java.util.*; + +import sun.jvm.hotspot.memory.*; +import sun.jvm.hotspot.runtime.*; +import sun.jvm.hotspot.debugger.*; +import sun.jvm.hotspot.oops.*; + +/** Provides information about monitor cache. */ + +public class MonitorCacheDumpPanel extends JPanel { + public MonitorCacheDumpPanel() { + super(); + + setLayout(new BorderLayout()); + + // Simple at first + JScrollPane scroller = new JScrollPane(); + JTextArea textArea = new JTextArea(); + textArea = new JTextArea(); + textArea.setEditable(false); + textArea.setLineWrap(true); + textArea.setWrapStyleWord(true); + scroller.getViewport().add(textArea); + add(scroller, BorderLayout.CENTER); + + ByteArrayOutputStream bos = new ByteArrayOutputStream(); + PrintStream tty = new PrintStream(bos); + tty.println("Monitor Cache Dump (not including JVMTI raw monitors):"); + tty.println(); + dumpOn(tty); + + textArea.setText(bos.toString()); + } + + private static void dumpMonitor(PrintStream tty, ObjectMonitor mon, boolean raw) { + tty.print("ObjectMonitor@" + mon.getAddress()); + if (raw) tty.print("(Raw Monitor)"); + tty.println(); + tty.println(" _header: 0x" + Long.toHexString(mon.header().value())); + OopHandle obj = mon.object(); + Oop oop = heap.newOop(obj); + tty.println(" _object: " + obj + ", a " + oop.getKlass().getName().asString()); + Address owner = mon.owner(); + tty.println(" _owner: " + owner); + if (!raw && owner != null) { + JavaThread thread = threads.owningThreadFromMonitor(mon); + if (thread != null) { + tty.println(" owning thread: " + thread.getThreadName()); + if (!thread.getAddress().equals(owner)) { + if (!thread.isLockOwned(owner)) { + tty.println(" WARNING! _owner doesn't fall in " + thread + + "'s stack space"); + } + } + } + } + tty.println(" _count: " + mon.count()); + tty.println(" _waiters: " + mon.waiters()); + tty.println(" _recursions: " + mon.recursions()); + } + + private void dumpOn(PrintStream tty) { + Iterator i = ObjectSynchronizer.objectMonitorIterator(); + if (i == null) { + tty.println("This version of HotSpot VM doesn't support monitor cache dump."); + tty.println("You need 1.4.0_04, 1.4.1_01 or later versions"); + return; + } + ObjectMonitor mon; + while (i.hasNext()) { + mon = (ObjectMonitor)i.next(); + if (mon.count() != 0 || mon.waiters() != 0 || mon.owner() != null) { + OopHandle object = mon.object(); + if (object == null) { + dumpMonitor(tty, mon, true); + } else { + dumpMonitor(tty, mon, false); + } + } + } + } + + private static Threads threads = VM.getVM().getThreads(); + private static ObjectHeap heap = VM.getVM().getObjectHeap(); +}