1 /*
   2  * Copyright (c) 2016, 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.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.test.lib.Asserts;
  34 import jdk.test.lib.jfr.EventNames;
  35 import jdk.test.lib.jfr.Events;
  36 import jdk.test.lib.jfr.GCHelper;
  37 
  38 /**
  39  * @test
  40  * @bug 8149650
  41  *
  42  *
  43  * @key jfr
  44  * @library /lib /
  45  * @run main/othervm -XX:NewSize=2m -XX:MaxNewSize=2m -Xmx32m -XX:G1HeapRegionSize=1m -XX:+UseG1GC jdk.jfr.event.gc.detailed.TestG1HeapRegionTypeChangeEvent
  46  */
  47 
  48 public class TestG1HeapRegionTypeChangeEvent {
  49     private final static String EVENT_NAME = EventNames.G1HeapRegionTypeChange;
  50 
  51     public static void main(String[] args) throws Exception {
  52         Recording recording = null;
  53         try {
  54             recording = new Recording();
  55             // activate the event we are interested in and start recording
  56             recording.enable(EVENT_NAME).withThreshold(Duration.ofMillis(0));
  57             recording.start();
  58 
  59             // Setting NewSize and MaxNewSize will limit eden, so
  60             // allocating 1024 20k byte arrays should trigger at
  61             // least a few Young GCs.
  62             byte[][] array = new byte[1024][];
  63             for (int i = 0; i < array.length; i++) {
  64                 array[i] = new byte[20 * 1024];
  65             }
  66             recording.stop();
  67 
  68             // Verify recording
  69             List<RecordedEvent> events = Events.fromRecording(recording);
  70             Asserts.assertFalse(events.isEmpty(), "No events found");
  71 
  72             for (RecordedEvent event : events) {
  73                 Events.assertField(event, "index").notEqual(-1);
  74                 Asserts.assertTrue(GCHelper.isValidG1HeapRegionType(Events.assertField(event, "from").getValue()));
  75                 Asserts.assertTrue(GCHelper.isValidG1HeapRegionType(Events.assertField(event, "to").getValue()));
  76                 Events.assertField(event, "used").atMost(1L*1024*1024);
  77             }
  78         } catch (Throwable t) {
  79             if (recording != null) {
  80                 recording.dump(Paths.get("TestG1HeapRegionTypeChangeEvent.jfr"));
  81             }
  82             throw t;
  83         } finally {
  84             if (recording != null) {
  85                 recording.close();
  86             }
  87         }
  88     }
  89 }