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 * Copyright (c) 2013, 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.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * 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,

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 *

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package jdk.jfr.event.runtime;

import static jdk.test.lib.Asserts.assertTrue;

import java.time.Duration;

import java.util.List;

import java.util.concurrent.CountDownLatch;

import java.util.concurrent.locks.LockSupport;

import jdk.jfr.Recording;

import jdk.jfr.consumer.RecordedEvent;

import jdk.test.lib.jfr.EventNames;

import jdk.test.lib.jfr.Events;

import jdk.test.lib.management.ThreadMXBeanTool;

import jdk.test.lib.thread.TestThread;

/**

 * @test

 * @key jfr

 * @requires vm.hasJFR

 * @library /test/lib

 *

 * @run main/othervm jdk.jfr.event.runtime.TestThreadParkEvent

 */

public class TestThreadParkEvent {

    private static final String EVENT_NAME = EventNames.ThreadPark;

    private static final long THRESHOLD_MILLIS = 1;

    static class Blocker {

    }

    public static void main(String[] args) throws Throwable {

        final CountDownLatch stop = new CountDownLatch(1);

        final Blocker blocker = new Blocker();

        TestThread parkThread = new TestThread(new Runnable() {

            public void run() {

                while (stop.getCount() > 0) {

                }

            }

        });

        Recording recording = new Recording();

        recording.enable(EVENT_NAME).withThreshold(Duration.ofMillis(THRESHOLD_MILLIS));

        try {

            recording.start();

            parkThread.start();

            // sleep so we know the event is recorded

            Thread.sleep(2 * THRESHOLD_MILLIS);

        } finally {

            stop.countDown();

            LockSupport.unpark(parkThread);

            parkThread.join();

            recording.stop();

        }

        List<RecordedEvent> events = Events.fromRecording(recording);

        Events.hasEvents(events);

        for (RecordedEvent event : events) {

            System.out.println("Event:" + event);

            String klassName = Events.assertField(event, "parkedClass.name").notNull().getValue();

            if (klassName.equals(blocker.getClass().getName().replace('.', '/'))) {

                Events.assertField(event, "address").notEqual(0L);

                Events.assertEventThread(event, parkThread);

            }

        }

    }

}