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/*
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* Copyright (c) 2019, 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. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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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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package jdk.jfr.jvm;
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import java.time.Duration;
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import java.util.List;
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import java.util.concurrent.CountDownLatch;
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import jdk.jfr.consumer.RecordedEvent;
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import jdk.jfr.internal.JVM;
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import jdk.jfr.Recording;
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import jdk.test.lib.jfr.EventNames;
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import jdk.test.lib.jfr.Events;
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import static jdk.test.lib.Asserts.assertTrue;
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/**
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* @test
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* @key jfr
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* @requires vm.hasJFR
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* @library /test/lib
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* @modules jdk.jfr/jdk.jfr.internal
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* @run main/othervm jdk.jfr.jvm.TestThreadExclusion
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*/
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/**
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* Starts and stops a number of threads in order.
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* Verifies that events are in the same order.
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*/
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public class TestThreadExclusion {
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private final static String EVENT_NAME_THREAD_START = EventNames.ThreadStart;
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private final static String EVENT_NAME_THREAD_END = EventNames.ThreadEnd;
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private static final String THREAD_NAME_PREFIX = "TestThread-";
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private static JVM jvm;
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public static void main(String[] args) throws Throwable {
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// Test Java Thread Start event
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Recording recording = new Recording();
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recording.enable(EVENT_NAME_THREAD_START).withThreshold(Duration.ofMillis(0));
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recording.enable(EVENT_NAME_THREAD_END).withThreshold(Duration.ofMillis(0));
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recording.start();
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LatchedThread[] threads = startThreads();
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long[] javaThreadIds = getJavaThreadIds(threads);
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stopThreads(threads);
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recording.stop();
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List<RecordedEvent> events = Events.fromRecording(recording);
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verifyThreadExclusion(events, javaThreadIds);
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}
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private static void verifyThreadExclusion(List<RecordedEvent> events, long[] javaThreadIds) throws Exception {
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for (RecordedEvent event : events) {
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System.out.println("Event:" + event);
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final long eventJavaThreadId = event.getThread().getJavaThreadId();
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for (int i = 0; i < javaThreadIds.length; ++i) {
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if (eventJavaThreadId == javaThreadIds[i]) {
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throw new Exception("Event " + event.getEventType().getName() + " has a thread id " + eventJavaThreadId + " that should have been excluded");
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}
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}
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}
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}
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private static LatchedThread[] startThreads() {
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LatchedThread threads[] = new LatchedThread[10];
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ThreadGroup threadGroup = new ThreadGroup("TestThreadGroup");
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jvm = JVM.getJVM();
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for (int i = 0; i < threads.length; i++) {
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threads[i] = new LatchedThread(threadGroup, THREAD_NAME_PREFIX + i);
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jvm.exclude(threads[i]);
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threads[i].startThread();
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System.out.println("Started thread id=" + threads[i].getId());
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}
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return threads;
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}
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private static long[] getJavaThreadIds(LatchedThread[] threads) {
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long[] javaThreadIds = new long[threads.length];
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for (int i = 0; i < threads.length; ++i) {
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javaThreadIds[i] = threads[i].getId();
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}
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return javaThreadIds;
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}
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private static void stopThreads(LatchedThread[] threads) {
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for (LatchedThread thread : threads) {
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assertTrue(jvm.isExcluded(thread), "Thread " + thread + "should be excluded");
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thread.stopThread();
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while (thread.isAlive()) {
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try {
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Thread.sleep(5);
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} catch (InterruptedException e) {
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e.printStackTrace();
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}
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}
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}
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}
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private static class LatchedThread extends Thread {
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private final CountDownLatch start = new CountDownLatch(1);
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private final CountDownLatch stop = new CountDownLatch(1);
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public LatchedThread(ThreadGroup threadGroup, String name) {
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super(threadGroup, name);
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}
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public void run() {
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start.countDown();
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try {
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stop.await();
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} catch (InterruptedException e) {
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e.printStackTrace();
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}
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}
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public void startThread() {
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this.start();
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try {
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start.await();
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} catch (InterruptedException e) {
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e.printStackTrace();
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}
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}
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public void stopThread() {
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stop.countDown();
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}
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}
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}
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