test/hotspot/jtreg/vmTestbase/nsk/monitoring/LockTest/LockTest001/LockTest001.java

/*
 * Copyright (c) 2010, 2018, 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.
 */

/*
 * @test
 *
 * @summary converted from VM Testbase nsk/monitoring/LockTest/LockTest001.
 * VM Testbase keywords: [monitoring, vm6]
 *
 * @library /vmTestbase
 *          /test/lib
 * @run driver jdk.test.lib.FileInstaller . .
 * @run main/othervm nsk.monitoring.LockTest.LockTest001.LockTest001
 */

package nsk.monitoring.LockTest.LockTest001;

import java.lang.management.ThreadInfo;
import java.lang.management.ManagementFactory;

import nsk.share.TestFailure;

public class LockTest001
{
  private Object syncObj = new Object();

  public LockTest001()
  {  }

  public void test()
  {

    int localVar0, localVar1, localVar2, localVar3, localVar4, localVar5, localVar6, localVar7, localVar8, localVar9;
    int localVar10, localVar11, localVar12, localVar13, localVar14, localVar15, localVar16, localVar17, localVar18, localVar19;
    int localVar20, localVar21, localVar22, localVar23, localVar24, localVar25, localVar26, localVar27, localVar28, localVar29;
    int localVar30, localVar31, localVar32, localVar33, localVar34, localVar35, localVar36, localVar37, localVar38, localVar39;
    int localVar40, localVar41, localVar42, localVar43, localVar44, localVar45, localVar46, localVar47, localVar48, localVar49;

    String threadName = Thread.currentThread().getName();
    System.out.println(threadName + ": Entering test()");

    synchronized (syncObj)
    {
      int n = 0;
      for (int i = 0; i < 10000000; i++)
        n += i;
      logMonitors((n & 1) >>> (n & 1));
    } // end sync

    logMonitors(1);

    synchronized (syncObj)
    {
      logMonitors(2);
    }
    logMonitors(3);

    System.out.println(threadName + ": Leaving test()");
    return;
  }

  public static void logMonitors(int n)
  {
    String threadName = Thread.currentThread().getName();
    java.lang.management.MonitorInfo[] monitors = java.lang.management.ManagementFactory.getThreadMXBean()
                                                  .getThreadInfo(new long[] { Thread.currentThread().getId() }, true, true)[0].getLockedMonitors();
    System.out.println(threadName + ": Checkpoint #" + n + ", number of monitors: " + monitors.length);
    if ((n == 3) && (monitors.length > 0))
      System.out.println(threadName + ": MONITOR HELD AFTER EXITING SYNCHRONIZED BLOCK!");
    for (int i = 0; i < monitors.length; i++)
    {
      java.lang.management.MonitorInfo monitor = monitors[i];
      System.out.println(threadName + ": MonitorInfo[" + i + "]=" + monitor.toString() + ", StackDepth=" + monitor.getLockedStackDepth()
                         + ", frame=" + ((monitor.getLockedStackFrame() == null) ? "No Frame" : monitor.getLockedStackFrame().toString()));
    }
    return;
  }

  public static void main(String[] argv)
  {
    LockTest001 lt = new LockTest001();
    RunLockTest rlt = new RunLockTest(lt, 10000);
    Thread t = new Thread(rlt);
    System.out.println("main: About to start first thread: " + t.getName());
    t.start();

    synchronized (rlt)
    {
      while (!rlt.finishedTest)
      {
        try
        {  rlt.wait();  }
        catch (Exception e)
        {  }
      }
    }

    rlt = new RunLockTest(lt, 0);
    t = new Thread(rlt);
    System.out.println("main: About to start second thread: " + t.getName());
    t.start();

    // amount of time to wait for the thread. In case of buggy behavior, the thread will hang forever.
    // but long enough to complete test on busy boxes
    long endTime = System.currentTimeMillis() + 5 * 60 * 1000;

    boolean isError = true;

    while (System.currentTimeMillis() < endTime)
    {
      if (t.getState() == Thread.State.TERMINATED)
      {
          isError = false;
          break;
      }
      try
      {  Thread.currentThread().sleep(1000);  }
      catch (Exception e)
      {  }
      ThreadInfo[] tis = ManagementFactory.getThreadMXBean().getThreadInfo(new long[] { t.getId() }, true, true);
      if (tis.length == 0)
        System.out.println("Unable to find the thread " + t.getName());
      else
      {
        ThreadInfo ti = tis[0];
        if (ti == null)
          System.out.println("Unable to get info for thread: " + t.getName());
        else
          System.out.println(t.getName() + " state: " + ti.getThreadState().toString() +
                             ", LockName: " + ti.getLockName() + ", LockOwnerName: " + ti.getLockOwnerName());
      }
    }

    if (!isError)
        System.out.println("TEST PASSED");
    else
        throw new TestFailure("TEST FAILED");
    return;
  }

  public static class RunLockTest implements Runnable
  {
    public LockTest001 lt;
    public boolean finishedTest = false;
    public long sleepLength;

    public RunLockTest(LockTest001 _lt, long _sleepLength)
    {
      lt = _lt;
      sleepLength = _sleepLength;
    }

    public void run()
    {
      lt.test();
      synchronized (this)
      {
        finishedTest = true;
        this.notify();
      }
      if (sleepLength > 0)
      {
        try
        {  Thread.currentThread().sleep(sleepLength);  }
        catch (Exception e)
        {  }
      }
      System.out.println(Thread.currentThread().getName() + ": exiting");
      return;
    }
  }

}