1 /* 2 * Copyright (c) 2019, Red Hat, Inc. All rights reserved. 3 * 4 * This code is free software; you can redistribute it and/or modify it 5 * under the terms of the GNU General Public License version 2 only, as 6 * published by the Free Software Foundation. 7 * 8 * This code is distributed in the hope that it will be useful, but WITHOUT 9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 11 * version 2 for more details (a copy is included in the LICENSE file that 12 * accompanied this code). 13 * 14 * You should have received a copy of the GNU General Public License version 15 * 2 along with this work; if not, write to the Free Software Foundation, 16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 17 * 18 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 19 * or visit www.oracle.com if you need additional information or have any 20 * questions. 21 * 22 */ 23 24 package jdk.jfr.event.gc.detailed; 25 26 import java.nio.file.Paths; 27 import java.time.Duration; 28 import java.util.List; 29 30 import jdk.jfr.Recording; 31 import jdk.jfr.consumer.RecordedEvent; 32 import jdk.test.lib.Asserts; 33 import jdk.test.lib.jfr.EventNames; 34 import jdk.test.lib.jfr.Events; 35 import jdk.test.lib.jfr.GCHelper; 36 37 /** 38 * @test 39 * @bug 8221507 40 * @requires vm.hasJFR & vm.gc.Shenandoah 41 * @key jfr 42 * @library /test/lib /test/jdk 43 * @run main/othervm -Xmx32m -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahGarbageThreshold=1 jdk.jfr.event.gc.detailed.TestShenandoahHeapRegionStateChangeEvent 44 */ 45 46 public class TestShenandoahHeapRegionStateChangeEvent { 47 private final static String EVENT_NAME = EventNames.ShenandoahHeapRegionStateChange; 48 49 public static void main(String[] args) throws Exception { 50 try (Recording recording = new Recording()) { 51 // activate the event we are interested in and start recording 52 recording.enable(EVENT_NAME).withThreshold(Duration.ofMillis(0)); 53 recording.start(); 54 55 byte[][] array = new byte[1024][]; 56 for (int i = 0; i < array.length; i++) { 57 array[i] = new byte[20 * 1024]; 58 } 59 recording.stop(); 60 61 // Verify recording 62 List<RecordedEvent> events = Events.fromRecording(recording); 63 Asserts.assertFalse(events.isEmpty(), "No events found"); 64 65 for (RecordedEvent event : events) { 66 Events.assertField(event, "index").notEqual(-1); 67 GCHelper.assertIsValidShenandoahHeapRegionState(Events.assertField(event, "from").getValue()); 68 GCHelper.assertIsValidShenandoahHeapRegionState(Events.assertField(event, "to").getValue()); 69 Events.assertField(event, "used").atMost(1L*1024*1024); 70 } 71 } 72 } 73 }