88 lines
3.2 KiB
Java
88 lines
3.2 KiB
Java
/*
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* Copyright (c) 2005, 2015, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 5086470 6358247
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* @summary Basic Test for ThreadInfo.getLockedMonitors()
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* - a stack frame acquires no monitor
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* - a stack frame acquires one or more monitors
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* - a stack frame blocks on Object.wait
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* and the monitor waiting is not locked.
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* LockingThread is the class that creates threads
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* and do the checking.
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*
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* @author Mandy Chung
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*
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* @build Barrier
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* @build LockingThread
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* @build ThreadDump
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* @run main/othervm LockedMonitors
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*/
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import java.lang.management.*;
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import java.util.*;
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public class LockedMonitors {
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public static void main(String[] argv) throws Exception {
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ThreadMXBean mbean = ManagementFactory.getThreadMXBean();
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if (!mbean.isObjectMonitorUsageSupported()) {
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System.out.println("Monitoring of object monitor usage is not supported");
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return;
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}
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// Start the thread and print the thread dump
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LockingThread.startLockingThreads();
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ThreadDump.threadDump();
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ThreadInfo[] tinfos;
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long[] ids = LockingThread.getThreadIds();
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// Dump all threads with locked monitors
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tinfos = mbean.dumpAllThreads(true, false);
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LockingThread.checkLockedMonitors(tinfos);
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// Dump all threads with locked monitors and locked synchronizers
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tinfos = mbean.dumpAllThreads(true, true);
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LockingThread.checkLockedMonitors(tinfos);
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// Test getThreadInfo with locked monitors
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tinfos = mbean.getThreadInfo(ids, true, false);
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if (tinfos.length != ids.length) {
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throw new RuntimeException("Number of ThreadInfo objects = " +
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tinfos.length + " not matched. Expected: " + ids.length);
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}
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LockingThread.checkLockedMonitors(tinfos);
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// Test getThreadInfo with locked monitors and locked synchronizers
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tinfos = mbean.getThreadInfo(ids, true, true);
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if (tinfos.length != ids.length) {
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throw new RuntimeException("Number of ThreadInfo objects = " +
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tinfos.length + " not matched. Expected: " + ids.length);
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}
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LockingThread.checkLockedMonitors(tinfos);
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System.out.println("Test passed");
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}
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}
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