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/*
* Copyright (c) 2007, 2021, 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.
*/
package nsk.monitoring.ThreadMXBean.findMonitorDeadlockedThreads;
import java.lang.management.*;
import java.io.*;
import nsk.share.*;
import nsk.monitoring.share.*;
public class find006 {
private final static int DEF_TIME_MAX = 30; // default max # secs to test
private final static String PROG_NAME = "find006";
private static Wicket mainEntrance;
private static boolean testFailed = false;
private static Object waiter = new Object();
public static void main(String[] argv) {
System.exit(Consts.JCK_STATUS_BASE + run(argv, System.out));
}
public static int run(String[] argv, PrintStream out) {
ArgumentHandler argHandler = new ArgumentHandler(argv);
String[] args = argHandler.getArguments();
int timeMax = 0;
if (args.length == 0) {
timeMax = DEF_TIME_MAX;
} else {
try {
timeMax = Integer.parseUnsignedInt(args[0]);
} catch (NumberFormatException nfe) {
System.err.println("'" + args[0] + "': invalid timeMax value.");
usage();
}
}
Log log = new Log(out, argHandler);
ThreadMonitor monitor = Monitor.getThreadMonitor(log, argHandler);
long id = Thread.currentThread().getId();
long[] ids = monitor.findMonitorDeadlockedThreads();
if (ids == null) {
log.display("findCircularBlockedThread() returned null");
} else if (ids.length == 0) {
log.display("findCircularBlockedThread() returned array of length "
+ "0");
} else {
for (int i = 0; i < ids.length; i++) {
if (ids[i] == id) {
log.complain("TEST FAILED");
log.complain("findCircularBlockedThread() returned current "
+ "thread (id = " + id + ")");
testFailed = true;
break;
}
}
}
System.out.println("About to execute for " + timeMax + " seconds.");
long count = 0;
ThreadMXBean mbean = ManagementFactory.getThreadMXBean();
long start_time = System.currentTimeMillis();
while (System.currentTimeMillis() < start_time + (timeMax * 1000)) {
count++;
MyThread thread = new MyThread(out);
mainEntrance = new Wicket();
thread.start();
// Wait for MyThread to start
mainEntrance.waitFor();
id = thread.getId();
synchronized (waiter) {
thread.die = true;
waiter.notifyAll();
}
while (true) {
ids = monitor.findMonitorDeadlockedThreads();
ThreadInfo info = mbean.getThreadInfo(id, Integer.MAX_VALUE);
if (info == null) {
// the thread has exited
break;
}
}
try {
thread.join();
} catch (InterruptedException e) {
throw new Error("Unexpected: " + e);
}
}
System.out.println("Executed " + count + " loops in " + timeMax +
" seconds.");
return (testFailed) ? Consts.TEST_FAILED : Consts.TEST_PASSED;
}
public static void usage() {
System.err.println("Usage: " + PROG_NAME + " [time_max]");
System.err.println("where:");
System.err.println(" time_max max looping time in seconds");
System.err.println(" (default is " + DEF_TIME_MAX +
" seconds)");
System.exit(1);
}
private static class MyThread extends Thread {
final static long WAIT_TIME = 10; // Milliseconds
volatile boolean die = false;
PrintStream out;
MyThread(PrintStream out) {
this.out = out;
}
public void run() {
// Notify "main" thread that MyThread has started
mainEntrance.unlock();
while (!die) {
synchronized(waiter) {
try {
waiter.wait(WAIT_TIME);
} catch (InterruptedException e) {
out.println("Unexpected exception.");
e.printStackTrace(out);
testFailed = true;
}
} // synchronized
}
} // run()
} // MyThread
}
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