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 }