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  *
  38  * @library /lib /
  39  *
  40  * @run main/othervm jdk.jfr.jvm.TestCreateNative
  41  */
  42 public class TestCreateNative {
  43 
  44     // This is a white-box test where we fabricate a native initialization
  45     // error by calling JMV#createNative(false), which will tear down
  46     // all native structures after they are setup, as if something went wrong
  47     // at the last step.
  48     public static void main(String... args) throws Exception {
  49         JVM jvm = JVM.getJVM();
  50         // Ensure that repeated failures can be handled
  51         for (int i = 1; i < 4; i++) {
  52             System.out.println("About to try failed initialization, attempt " + i + " out of 3");
  53             assertFailedInitialization(jvm);
  54             System.out.println("As expected, initialization failed.");
  55         }
  56         // Ensure that Flight Recorder can be initialized properly after failures
  57         Configuration defConfig = Configuration.getConfiguration("default");
  58         Recording r = new Recording(defConfig);
  59         r.start();
  60         r.stop();
  61         r.dump(Paths.get("recording.jfr"));
  62         r.close();
  63     }
  64 
  65     private static void assertFailedInitialization(JVM jvm) throws Exception {
  66         try {
  67             jvm.createFailedNativeJFR();
  68             throw new Exception("Expected failure when creating native JFR");
  69         } catch (IllegalStateException ise) {
  70             String message = ise.getMessage();
  71             if (!message.equals("Unable to start Jfr")) {
  72                 throw new Exception("Expected failure on initialization of native JFR");
  73             }
  74         }
  75     }
  76 }