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.jvm;

    26 

    27 import java.nio.file.Paths;

    28 

    29 import jdk.jfr.Configuration;

    30 import jdk.jfr.Recording;

    31 import jdk.jfr.internal.JVM;

    32 

    33 /*

    34  * @test

    35  * @summary Checks that the JVM can rollback on native initialization failures.

    36  * @key jfr

    37  * @library /test/lib

    38  * @modules jdk.jfr/jdk.jfr.internal

    39  * @run main/othervm jdk.jfr.jvm.TestCreateNative

    40  */

    41 public class TestCreateNative {

    42 

    43     // This is a white-box test where we fabricate a native initialization

    44     // error by calling JMV#createNative(false), which will tear down

    45     // all native structures after they are setup, as if something went wrong

    46     // at the last step.

    47     public static void main(String... args) throws Exception {

    48         JVM jvm = JVM.getJVM();

    49         // Ensure that repeated failures can be handled

    50         for (int i = 1; i < 4; i++) {

    51             System.out.println("About to try failed initialization, attempt " + i + " out of 3");

    52             assertFailedInitialization(jvm);

    53             System.out.println("As expected, initialization failed.");

    54         }

    55         // Ensure that Flight Recorder can be initialized properly after failures

    56         Configuration defConfig = Configuration.getConfiguration("default");

    57         Recording r = new Recording(defConfig);

    58         r.start();

    59         r.stop();

    60         r.dump(Paths.get("recording.jfr"));

    61         r.close();

    62     }

    63 

    64     private static void assertFailedInitialization(JVM jvm) throws Exception {

    65         try {

    66             jvm.createFailedNativeJFR();

    67             throw new Exception("Expected failure when creating native JFR");

    68         } catch (IllegalStateException ise) {

    69             String message = ise.getMessage();

    70             if (!message.equals("Unable to start Jfr")) {

    71                 throw new Exception("Expected failure on initialization of native JFR");

    72             }

    73         }

    74     }

    75 }