--- /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();
+}