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.test.lib.jfr;

    26 

    27 import static jdk.test.lib.Asserts.assertEquals;

    28 import static jdk.test.lib.Asserts.fail;

    29 

    30 import java.io.IOException;

    31 import java.nio.file.Files;

    32 import java.nio.file.Path;

    33 import java.util.List;

    34 

    35 import jdk.jfr.Recording;

    36 import jdk.jfr.RecordingState;

    37 import jdk.jfr.consumer.RecordedEvent;

    38 import jdk.jfr.consumer.RecordingFile;

    39 import jdk.test.lib.Asserts;

    40 

    41 

    42 /**

    43  * Common helper class.

    44  */

    45 public final class CommonHelper {

    46 

    47     private static RecordedEvent timeStampCounterEvent;

    48 

    49     public static void verifyException(VoidFunction f, String msg, Class<? extends Throwable> expectedException) throws Throwable {

    50         try {

    51             f.run();

    52         } catch (Throwable t) {

    53             if (expectedException.isAssignableFrom(t.getClass())) {

    54                 return;

    55             }

    56             t.printStackTrace();

    57             assertEquals(t.getClass(), expectedException, "Wrong exception class");

    58         }

    59         fail("Missing Exception for: " + msg);

    60     }

    61 

    62     public static Recording verifyExists(long recId, List<Recording> recordings) {

    63         for (Recording r : recordings) {

    64             if (recId == r.getId()) {

    65                 return r;

    66             }

    67         }

    68         Asserts.fail("Recording not found, id=" + recId);

    69         return null;

    70     }

    71 

    72 

    73     public static void waitForRecordingState(Recording r, RecordingState expectedState) throws Exception {

    74         while (r.getState() != expectedState) {

    75             Thread.sleep(20);

    76         }

    77     }

    78 

    79     public static void verifyRecordingState(Recording r, RecordingState expectedState) throws Exception {

    80         assertEquals(expectedState, r.getState(), "Wrong state");

    81     }

    82 

    83     public static boolean hasFastTimeEnabled() throws Exception {

    84         return getTimeStampCounterEvent().getValue("fastTimeEnabled");

    85     }

    86 

    87     private synchronized static RecordedEvent getTimeStampCounterEvent() throws IOException, Exception {

    88         if (timeStampCounterEvent == null) {

    89             try (Recording r = new Recording()) {

    90                 r.enable(EventNames.CPUTimeStampCounter);

    91                 r.start();

    92                 r.stop();

    93                 Path p = Files.createTempFile("timestamo", ".jfr");

    94                 r.dump(p);

    95                 List<RecordedEvent> events = RecordingFile.readAllEvents(p);

    96                 Files.deleteIfExists(p);

    97                 if (events.isEmpty()) {

    98                     throw new Exception("Could not locate CPUTimeStampCounter event");

    99                 }

   100                 timeStampCounterEvent = events.get(0);

   101             }

   102         }

   103         return timeStampCounterEvent;

   104     }

   105 

   106     public static void waitForSystemCurrentMillisToChange() {

   107         long t = System.currentTimeMillis();

   108         while (t != System.currentTimeMillis()) {

   109             try {

   110                 Thread.sleep(2);

   111             } catch (InterruptedException e) {

   112                throw new Error("Sleep interupted", e);

   113             }

   114         }

   115     }

   116 }