/*

 * Copyright (c) 2016, 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,

 * 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 jdk.jfr.event.runtime;

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

import java.nio.file.Paths;

import java.time.Duration;

import java.util.concurrent.CountDownLatch;

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.thread.TestThread;

import jdk.test.lib.thread.XRun;

/**

 * @test TestJavaMonitorInflateEvent

 * @key jfr

 * @requires vm.hasJFR

 * @library /test/lib

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

 */

public class TestJavaMonitorInflateEvent {

    private static final String FIELD_KLASS_NAME = "monitorClass.name";

    private static final String FIELD_ADDRESS    = "address";

    private static final String FIELD_CAUSE      = "cause";

    private static final String EVENT_NAME = EventNames.JavaMonitorInflate;

    private static final long WAIT_TIME = 123456;

    static class Lock {

    }

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

        Recording recording = new Recording();

        recording.enable(EVENT_NAME).withThreshold(Duration.ofMillis(0));

        final Lock lock = new Lock();

        final CountDownLatch latch = new CountDownLatch(1);

        // create a thread that waits

        TestThread waitThread = new TestThread(new XRun() {

            @Override

            public void xrun() throws Throwable {

                synchronized (lock) {

                    latch.countDown();

                    lock.wait(WAIT_TIME);

                }

            }

        });

        try {

            recording.start();

            waitThread.start();

            latch.await();

            synchronized (lock) {

                lock.notifyAll();

            }

        } finally {

            waitThread.join();

            recording.stop();

        }

        final String thisThreadName = Thread.currentThread().getName();

        final String waitThreadName = waitThread.getName();

        final String lockClassName = lock.getClass().getName().replace('.', '/');

        boolean isAnyFound = false;

        try {

            // Find at least one event with the correct monitor class and check the other fields

            for (RecordedEvent event : Events.fromRecording(recording)) {

                assertTrue(EVENT_NAME.equals(event.getEventType().getName()), "mismatched event types?");

                // Check recorded inflation event is associated with the Lock class used in the test

                final String recordedMonitorClassName = Events.assertField(event, FIELD_KLASS_NAME).getValue();

                if (!lockClassName.equals(recordedMonitorClassName)) {

                    continue;

                }

                // Check recorded thread matches one of the threads in the test

                final String recordedThreadName = event.getThread().getJavaName();

                if (!(recordedThreadName.equals(waitThreadName) || recordedThreadName.equals(thisThreadName))) {

                    continue;

                }

                Events.assertField(event, FIELD_ADDRESS).notEqual(0L);

                Events.assertField(event, FIELD_CAUSE).notNull();

                isAnyFound = true;

                break;

            }

            assertTrue(isAnyFound, "Expected an inflation event from test");

        } catch (Throwable e) {

            recording.dump(Paths.get("failed.jfr"));

            throw e;

        } finally {

            recording.close();

        }

    }

}