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.gc.refstat; 27 28 import java.time.Duration; 29 import java.util.ArrayList; 30 import java.util.Arrays; 31 import java.util.List; 32 import java.util.stream.Collectors; 33 34 import jdk.jfr.Recording; 35 import jdk.jfr.consumer.RecordedEvent; 36 import jdk.test.lib.Asserts; 37 import jdk.test.lib.jfr.EventNames; 38 import jdk.test.lib.jfr.Events; 39 import jdk.test.lib.jfr.GCHelper; 40 41 42 public class RefStatEvent { 43 44 private static final String gcEventPath = EventNames.GarbageCollection; 45 private static final String refStatsEventPath = EventNames.GCReferenceStatistics; 46 public static byte[] garbage; 47 48 public static void test(String gcName) throws Exception { 49 Recording recording = new Recording(); 50 recording.enable(refStatsEventPath).withThreshold(Duration.ofMillis(0)); 51 recording.enable(gcEventPath).withThreshold(Duration.ofMillis(0)); 52 53 recording.start(); 54 GCHelper.callSystemGc(6, true); 55 recording.stop(); 56 57 System.out.println("gcName=" + gcName); 58 List<RecordedEvent> events = GCHelper.removeFirstAndLastGC(Events.fromRecording(recording)); 59 Events.hasEvents(events); 60 for (RecordedEvent event : events) { 61 System.out.println("Event: " + event); 62 } 63 64 for (RecordedEvent event : events) { 65 if (!Events.isEventType(event, gcEventPath)) { 66 continue; 67 } 68 System.out.println("Event: " + event); 69 final int gcId = Events.assertField(event, "gcId").getValue(); 70 final String name = Events.assertField(event, "name").notEmpty().getValue(); 71 if (gcName.equals(name)) { 72 verifyRefStatEvents(events, gcId); 73 } 74 } 75 } 76 77 // Check that we have a refStat event for each type for this GC. 78 private static void verifyRefStatEvents(List<RecordedEvent> events, int gcId) { 79 List<String> expectedTypes = Arrays.asList("Soft reference", "Weak reference", "Final reference", "Phantom reference"); 80 List<String> actualTypes = new ArrayList<>(); 81 try { 82 for (RecordedEvent event : events) { 83 if (!Events.isEventType(event, refStatsEventPath)) { 84 continue; 85 } 86 Events.assertField(event, "count").atLeast(0L); 87 if (Events.assertField(event, "gcId").isEqual(gcId)) { 88 actualTypes.add(Events.assertField(event, "type").notEmpty().getValue()); 89 } 90 } 91 92 Asserts.assertEquals(actualTypes.size(), expectedTypes.size(), "Wrong number of refStat events"); 93 Asserts.assertTrue(expectedTypes.containsAll(actualTypes), "Found unknown refStat types"); 94 Asserts.assertTrue(actualTypes.containsAll(expectedTypes), "Missning refStat types"); 95 } catch (Exception e) { 96 System.out.println("Expected refStatTypes: " + expectedTypes.stream().collect(Collectors.joining(", "))); 97 System.out.println("Got refStatTypes: " + actualTypes.stream().collect(Collectors.joining(", "))); 98 throw e; 99 } 100 } 101 102 }