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