1 /* 2 * Copyright (c) 2013, 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package jdk.jfr.event.runtime; 27 28 import java.time.Duration; 29 import java.util.List; 30 import java.util.concurrent.CountDownLatch; 31 32 import jdk.jfr.Recording; 33 import jdk.jfr.consumer.RecordedEvent; 34 import jdk.test.lib.jfr.EventNames; 35 import jdk.test.lib.jfr.Events; 36 37 /** 38 * @test 39 * @key jfr 40 * @requires vm.hasJFR 41 * @library /test/lib 42 * @run main/othervm jdk.jfr.event.runtime.TestThreadStartEndEvents 43 */ 44 45 /** 46 * Starts and stops a number of threads in order. 47 * Verifies that events are in the same order. 48 */ 49 public class TestThreadStartEndEvents { 50 private final static String EVENT_NAME_THREAD_START = EventNames.ThreadStart; 51 private final static String EVENT_NAME_THREAD_END = EventNames.ThreadEnd; 52 private static final String THREAD_NAME_PREFIX = "TestThread-"; 53 54 public static void main(String[] args) throws Throwable { 55 // Test Java Thread Start event 56 Recording recording = new Recording(); 57 recording.enable(EVENT_NAME_THREAD_START).withThreshold(Duration.ofMillis(0)); 58 recording.enable(EVENT_NAME_THREAD_END).withThreshold(Duration.ofMillis(0)); 59 recording.start(); 60 LatchedThread[] threads = startThreads(); 61 stopThreads(threads); 62 recording.stop(); 63 64 int currThreadIndex = 0; 65 long currentThreadId = Thread.currentThread().getId(); 66 List<RecordedEvent> events = Events.fromRecording(recording); 67 Events.hasEvents(events); 68 for (RecordedEvent event : events) { 69 System.out.println("Event:" + event); 70 if (event.getThread().getJavaThreadId() != currentThreadId) { 71 continue; 72 } 73 // Threads should be started and stopped in the correct order. 74 Events.assertEventThread(event, threads[currThreadIndex % threads.length]); 75 String eventName = currThreadIndex < threads.length ? EVENT_NAME_THREAD_START : EVENT_NAME_THREAD_END; 76 if (!eventName.equals(event.getEventType().getName())) { 77 throw new Exception("Expected event of tyoe " + eventName + " but got " + event.getEventType().getName()); 78 } 79 currThreadIndex++; 80 } 81 } 82 83 private static LatchedThread[] startThreads() { 84 LatchedThread threads[] = new LatchedThread[10]; 85 ThreadGroup threadGroup = new ThreadGroup("TestThreadGroup"); 86 for (int i = 0; i < threads.length; i++) { 87 threads[i] = new LatchedThread(threadGroup, THREAD_NAME_PREFIX + i); 88 threads[i].startThread(); 89 System.out.println("Started thread id=" + threads[i].getId()); 90 } 91 return threads; 92 } 93 94 private static void stopThreads(LatchedThread[] threads) { 95 for (LatchedThread thread : threads) { 96 thread.stopThread(); 97 while (thread.isAlive()) { 98 try { 99 Thread.sleep(5); 100 } catch (InterruptedException e) { 101 e.printStackTrace(); 102 } 103 } 104 } 105 } 106 107 private static class LatchedThread extends Thread { 108 private final CountDownLatch start = new CountDownLatch(1); 109 private final CountDownLatch stop = new CountDownLatch(1); 110 111 public LatchedThread(ThreadGroup threadGroup, String name) { 112 super(threadGroup, name); 113 } 114 115 public void run() { 116 start.countDown(); 117 try { 118 stop.await(); 119 } catch (InterruptedException e) { 120 e.printStackTrace(); 121 } 122 } 123 124 public void startThread() { 125 this.start(); 126 try { 127 start.await(); 128 } catch (InterruptedException e) { 129 e.printStackTrace(); 130 } 131 } 132 133 public void stopThread() { 134 stop.countDown(); 135 } 136 } 137 138 }