1 /*

     2  * Copyright (c) 2014, 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.api.consumer;

    26 

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

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

    29 import static jdk.test.lib.Asserts.assertTrue;

    30 

    31 import java.time.Duration;

    32 import java.util.List;

    33 

    34 import javax.script.ScriptEngine;

    35 import javax.script.ScriptEngineManager;

    36 

    37 import jdk.jfr.Event;

    38 import jdk.jfr.Recording;

    39 import jdk.jfr.consumer.RecordedEvent;

    40 import jdk.jfr.consumer.RecordedFrame;

    41 import jdk.jfr.consumer.RecordedStackTrace;

    42 import jdk.test.lib.jfr.Events;

    43 

    44 

    45 /*

    46  * @test

    47  * @key jfr

    48  *

    49  * @library /test/lib

    50  * @modules java.scripting

    51  *          jdk.jfr

    52  *

    53  * @run main/othervm jdk.jfr.api.consumer.TestHiddenMethod

    54  */

    55 public final class TestHiddenMethod {

    56 

    57     public static void main(String[] args) throws Throwable {

    58         Recording recording = new Recording();

    59         recording.enable(MyEvent.class).withThreshold(Duration.ofMillis(0));

    60         recording.start();

    61 

    62         // Commit event with hidden methods

    63         ScriptEngineManager manager = new ScriptEngineManager();

    64         ScriptEngine engine = manager.getEngineByName("nashorn");

    65         engine.eval(

    66                 "function emit() {"

    67                 + "  print('About to emit event from Javascript');"

    68                 + "  var TestEvent = Java.type(\"jdk.jfr.api.consumer.TestHiddenMethod$MyEvent\");"

    69                 + "  var event = new TestEvent;"

    70                 + "  event.begin();"

    71                 + "  event.end();"

    72                 + "  event.commit();"

    73                 + "  print('Event emitted from Javascript!');"

    74                 + "}"

    75                 + "emit();");

    76 

    77         // Commit event with visible method

    78         MyEvent visible = new MyEvent();

    79         visible.begin();

    80         visible.end();

    81         visible.commit();

    82         recording.stop();

    83 

    84         List<RecordedEvent> events = Events.fromRecording(recording);

    85         assertEquals(2, events.size(), "Expected two events");

    86         RecordedEvent hiddenEvent = events.get(0);

    87         RecordedEvent visibleEvent = events.get(1);

    88 

    89         System.out.println("hiddenEvent:" + hiddenEvent);

    90         System.out.println("visibleEvent:" + visibleEvent);

    91 

    92         assertTrue(hasHiddenStackFrame(hiddenEvent), "No hidden frame in hidden event: " + hiddenEvent);

    93         assertFalse(hasHiddenStackFrame(visibleEvent), "Hidden frame in visible event: " + visibleEvent);

    94     }

    95 

    96     private static boolean hasHiddenStackFrame(RecordedEvent event) throws Throwable {

    97         RecordedStackTrace stacktrace = event.getStackTrace();

    98         List<RecordedFrame> frames = stacktrace.getFrames();

    99         assertFalse(frames.isEmpty(), "Stacktrace frames was empty");

   100         for (RecordedFrame frame : frames) {

   101             if (frame.getMethod().isHidden()) {

   102                 return true;

   103             }

   104         }

   105         return false;

   106     }

   107 

   108     public static class MyEvent extends Event {

   109     }

   110 

   111 }