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.runtime;

    26 

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

    28 

    29 import java.util.HashMap;

    30 import java.util.List;

    31 import java.util.Map;

    32 

    33 import jdk.jfr.Recording;

    34 import jdk.jfr.consumer.RecordedEvent;

    35 import jdk.jfr.consumer.RecordedObject;

    36 import jdk.test.lib.jfr.EventNames;

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

    38 

    39 /*

    40  * @test

    41  * @summary Tests the JFR events related to modules

    42  * @key jfr

    43  * @library /test/lib

    44  * @run main/othervm --limit-modules java.base,jdk.jfr jdk.jfr.event.runtime.TestModuleEvents

    45  */

    46 public final class TestModuleEvents {

    47 

    48     private static final String MODULE_EXPORT_EVENT_NAME = EventNames.ModuleExport;

    49     private static final String MODULE_REQUIRE_EVENT_NAME = EventNames.ModuleRequire;

    50     private static final String UNNAMED = "<unnamed>";

    51 

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

    53         verifyRequiredModules();

    54         verifyExportedModules();

    55     }

    56 

    57     private static void verifyRequiredModules() throws Throwable {

    58         Recording recording = new Recording();

    59         recording.enable(MODULE_REQUIRE_EVENT_NAME);

    60 

    61         recording.start();

    62         recording.stop();

    63 

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

    65         assertDependency(events, "jdk.jfr", "java.base"); // jdk.jfr requires java.base (by edfault)

    66         assertDependency(events, "java.base", "jdk.jfr"); // java.base require jdk.jfr for JDK events, i.e. FileRead

    67 

    68         recording.close();

    69     }

    70 

    71     private static void assertDependency(List<RecordedEvent> events, String source, String required) throws Exception {

    72         for (RecordedEvent e : events) {

    73             String sourceModule = e.getValue("source.name");

    74             if (source.equals(sourceModule)) {

    75                 RecordedObject module = e.getValue("requiredModule");

    76                 if (module != null) {

    77                     if (required.equals(module.getValue("name"))) {

    78                         return;

    79                     }

    80                 }

    81             }

    82         }

    83         throw new Exception("Could not find module dependency between " + source + " and requires modeule "+ required);

    84     }

    85 

    86     private static void verifyExportedModules() throws Throwable {

    87         Recording recording = new Recording();

    88         recording.enable(MODULE_EXPORT_EVENT_NAME);

    89         recording.start();

    90         recording.stop();

    91 

    92         Map<String, String> edges = new HashMap<>();

    93 

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

    95         events.stream().forEach((ev) -> {

    96             String exportedPackage = getValue(ev.getValue("exportedPackage"), "name", UNNAMED);

    97             String toModule = getValue(ev.getValue("targetModule"), "name", UNNAMED);

    98 

    99             edges.put(exportedPackage, toModule);

   100         });

   101 

   102         // We expect

   103         // 1) jdk.jfr -> <unnamed> (because we use the package)

   104         // 2) java.util -> <unnamed> (because we use the package)

   105         // 3) jdk.jfr.events -> java.base (from the jfr design)

   106         // 4) jdk.internal -> jdk.jfr (from the jfr design)

   107         // Where 'a -> b' means "package 'a' exported to module 'b'"

   108         assertEquals(edges.get("jdk/jfr"), UNNAMED);

   109         assertEquals(edges.get("java/util"), UNNAMED);

   110         assertEquals(edges.get("jdk/jfr/events"), "java.base");

   111         assertEquals(edges.get("jdk/internal"), "jdk.jfr");

   112 

   113         recording.close();

   114     }

   115 

   116     // Helper function to get field from a RecordedObject

   117     private static String getValue(RecordedObject ro, String field, String defVal) {

   118         if (ro != null && ro.getValue(field) != null) {

   119             return ro.getValue(field);

   120         } else {

   121             return defVal;

   122         }

   123     }

   124 }