1 /* 2 * Copyright (c) 2016, 2019, 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.gc.detailed; 26 27 import java.nio.file.Paths; 28 import java.time.Duration; 29 import java.util.List; 30 31 import jdk.jfr.Recording; 32 import jdk.jfr.consumer.RecordedEvent; 33 import jdk.testlibrary.Asserts; 34 import jdk.testlibrary.jfr.EventNames; 35 import jdk.testlibrary.jfr.Events; 36 import jdk.testlibrary.jfr.GCHelper; 37 38 /* 39 * @test 40 * @bug 8149650 41 * @requires vm.gc == "G1" | vm.gc == null 42 * @key jfr 43 * @library /lib/testlibrary 44 * @run main/othervm -XX:NewSize=2m -XX:MaxNewSize=2m -Xmx32m -XX:G1HeapRegionSize=1m -XX:+UseG1GC jdk.jfr.event.gc.detailed.TestG1HeapRegionTypeChangeEvent 45 */ 46 47 public class TestG1HeapRegionTypeChangeEvent { 48 private final static String EVENT_NAME = EventNames.G1HeapRegionTypeChange; 49 50 public static void main(String[] args) throws Exception { 51 Recording recording = null; 52 try { 53 recording = new Recording(); 54 // activate the event we are interested in and start recording 55 recording.enable(EVENT_NAME).withThreshold(Duration.ofMillis(0)); 56 recording.start(); 57 58 // Setting NewSize and MaxNewSize will limit eden, so 59 // allocating 1024 20k byte arrays should trigger at 60 // least a few Young GCs. 61 byte[][] array = new byte[1024][]; 62 for (int i = 0; i < array.length; i++) { 63 array[i] = new byte[20 * 1024]; 64 } 65 recording.stop(); 66 67 // Verify recording 68 List<RecordedEvent> events = Events.fromRecording(recording); 69 Asserts.assertFalse(events.isEmpty(), "No events found"); 70 71 for (RecordedEvent event : events) { 72 Events.assertField(event, "index").notEqual(-1); 73 Asserts.assertTrue(GCHelper.isValidG1HeapRegionType(Events.assertField(event, "from").getValue())); 74 Asserts.assertTrue(GCHelper.isValidG1HeapRegionType(Events.assertField(event, "to").getValue())); 75 Events.assertField(event, "used").atMost(1L*1024*1024); 76 } 77 } catch (Throwable t) { 78 if (recording != null) { 79 recording.dump(Paths.get("TestG1HeapRegionTypeChangeEvent.jfr")); 80 } 81 throw t; 82 } finally { 83 if (recording != null) { 84 recording.close(); 85 } 86 } 87 } 88 }