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 package jdk.jfr.event.runtime; 26 27 import static jdk.test.lib.Asserts.assertTrue; 28 29 import java.nio.file.Paths; 30 import java.time.Duration; 31 import java.util.*; 32 33 import jdk.jfr.Recording; 34 import jdk.jfr.consumer.RecordedEvent; 35 36 import jdk.test.lib.Asserts; 37 import jdk.test.lib.jfr.EventNames; 38 import jdk.test.lib.jfr.Events; 39 import sun.hotspot.WhiteBox; 40 41 /** 42 * @test TestSafepointEvents 43 * @key jfr 44 * 45 * @library /lib / 46 * @build sun.hotspot.WhiteBox 47 * @run main ClassFileInstaller sun.hotspot.WhiteBox 48 * sun.hotspot.WhiteBox$WhiteBoxPermission 49 * @run main/othervm -Xbootclasspath/a:. 50 * -XX:+FlightRecorder -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI 51 * jdk.jfr.event.runtime.TestSafepointEvents 52 */ 53 public class TestSafepointEvents { 54 55 static final String[] EVENT_NAMES = new String[] { 56 EventNames.SafepointBegin, 57 EventNames.SafepointStateSynchronization, 58 EventNames.SafepointWaitBlocked, 59 EventNames.SafepointCleanup, 60 EventNames.SafepointCleanupTask, 61 EventNames.SafepointEnd 62 }; 63 64 public static void main(String[] args) throws Exception { 65 Recording recording = new Recording(); 66 for (String name : EVENT_NAMES) { 67 recording.enable(name).withThreshold(Duration.ofMillis(0)); 68 } 69 recording.start(); 70 WhiteBox.getWhiteBox().forceSafepoint(); 71 recording.stop(); 72 73 try { 74 // Verify that each event type was seen at least once 75 for (String name : EVENT_NAMES) { 76 boolean found = false; 77 for (RecordedEvent event : Events.fromRecording(recording)) { 78 found = event.getEventType().getName().equals(name); 79 if (found) { 80 break; 81 } 82 } 83 assertTrue(found, "Expected event from test [" + name + "]"); 84 } 85 86 // Collect all events grouped by safepoint id 87 SortedMap<Integer, Set<String>> safepointIds = new TreeMap<>(); 88 for (RecordedEvent event : Events.fromRecording(recording)) { 89 Integer safepointId = event.getValue("safepointId"); 90 if (!safepointIds.containsKey(safepointId)) { 91 safepointIds.put(safepointId, new HashSet<>()); 92 } 93 safepointIds.get(safepointId).add(event.getEventType().getName()); 94 } 95 96 // The last safepoint may be related to stopping the recording and can thus be 97 // incomplete - so if there is more than one, ignore the last one 98 if (safepointIds.size() > 1) { 99 safepointIds.remove(safepointIds.lastKey()); 100 } 101 Asserts.assertGreaterThanOrEqual(safepointIds.size(), 1, "At least 1 safepoint must have occured"); 102 103 // Verify that each safepoint id has an occurence of every event type, 104 // this ensures that all events related to a given safepoint had the same id 105 for (Set<String> safepointEvents : safepointIds.values()) { 106 for (String name : EVENT_NAMES) { 107 assertTrue(safepointEvents.contains(name), "Expected event '" + name + "' to be present"); 108 } 109 } 110 } catch (Throwable e) { 111 recording.dump(Paths.get("failed.jfr")); 112 throw e; 113 } finally { 114 recording.close(); 115 } 116 } 117 }