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/*
* Copyright (c) 2005, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* Thread Dump utility class for printing
* @author Mandy Chung
*/
import java.lang.management.*;
import java.util.*;
public class ThreadDump {
private static final String INDENT = " ";
public static void printThreadInfo(ThreadInfo ti) {
StringBuilder sb = new StringBuilder("\"" + ti.getThreadName() + "\"" +
(ti.isDaemon() ? " daemon" : "") +
" Id=" + ti.getThreadId() +
" in " + ti.getThreadState());
if (ti.getLockName() != null) {
sb.append(" on lock=" + ti.getLockName());
}
if (ti.isSuspended()) {
sb.append(" (suspended)");
}
if (ti.isInNative()) {
sb.append(" (running in native)");
}
System.out.println(sb.toString());
if (ti.getLockOwnerName() != null) {
System.out.println(INDENT + " owned by " + ti.getLockOwnerName() +
" Id=" + ti.getLockOwnerId());
}
StackTraceElement[] stacktrace = ti.getStackTrace();
MonitorInfo[] monitors = ti.getLockedMonitors();
for (int i = 0; i < stacktrace.length; i++) {
StackTraceElement ste = stacktrace[i];
System.out.println(INDENT + "at " + ste.toString());
for (MonitorInfo mi : monitors) {
if (mi.getLockedStackDepth() == i) {
System.out.println(INDENT + " - locked " + mi);
}
}
}
System.out.println();
}
public static void printStack(StackTraceElement[] stack) {
System.out.println(INDENT + "Stack: (length = " + stack.length + ")");
for (int j = 0; j < stack.length; j++) {
System.out.println(INDENT + INDENT + stack[j]);
}
System.out.println();
}
public static void dumpStacks() {
// Get stack traces of all Threads
Map m = Thread.getAllStackTraces();
Set s = m.entrySet();
Iterator iter = s.iterator();
Map.Entry entry;
while (iter.hasNext()) {
entry = (Map.Entry) iter.next();
Thread t = (Thread) entry.getKey();
StackTraceElement[] stack = (StackTraceElement[]) entry.getValue();
System.out.println(t);
printStack(stack);
}
}
public static void printLockInfo(LockInfo[] locks) {
System.out.println(INDENT + "Locked synchronizers: count = " + locks.length);
for (LockInfo li : locks) {
System.out.println(INDENT + " - " + li);
}
}
static ThreadMXBean tmbean = ManagementFactory.getThreadMXBean();
public static void threadDump() {
System.out.println("Full Java thread dump");
ThreadInfo[] tinfos = tmbean.dumpAllThreads(true, true);
for (ThreadInfo ti : tinfos) {
printThreadInfo(ti);
LockInfo[] syncs = ti.getLockedSynchronizers();
printLockInfo(syncs);
System.out.println();
}
}
}
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