--- /dev/null 2017-11-09 09:38:01.297999907 +0100 +++ new/test/jdk/jdk/jfr/jvm/TestCreateNative.java 2018-04-09 18:57:12.357158763 +0200 @@ -0,0 +1,75 @@ +/* + * Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. Oracle designates this + * particular file as subject to the "Classpath" exception as provided + * by Oracle in the LICENSE file that accompanied this code. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ +package jdk.jfr.jvm; + +import java.nio.file.Paths; + +import jdk.jfr.Configuration; +import jdk.jfr.Recording; +import jdk.jfr.internal.JVM; + +/* + * @test + * @summary Checks that the JVM can rollback on native initialization failures. + * @key jfr + * @library /test/lib + * @modules jdk.jfr/jdk.jfr.internal + * @run main/othervm jdk.jfr.jvm.TestCreateNative + */ +public class TestCreateNative { + + // This is a white-box test where we fabricate a native initialization + // error by calling JMV#createNative(false), which will tear down + // all native structures after they are setup, as if something went wrong + // at the last step. + public static void main(String... args) throws Exception { + JVM jvm = JVM.getJVM(); + // Ensure that repeated failures can be handled + for (int i = 1; i < 4; i++) { + System.out.println("About to try failed initialization, attempt " + i + " out of 3"); + assertFailedInitialization(jvm); + System.out.println("As expected, initialization failed."); + } + // Ensure that Flight Recorder can be initialized properly after failures + Configuration defConfig = Configuration.getConfiguration("default"); + Recording r = new Recording(defConfig); + r.start(); + r.stop(); + r.dump(Paths.get("recording.jfr")); + r.close(); + } + + private static void assertFailedInitialization(JVM jvm) throws Exception { + try { + jvm.createFailedNativeJFR(); + throw new Exception("Expected failure when creating native JFR"); + } catch (IllegalStateException ise) { + String message = ise.getMessage(); + if (!message.equals("Unable to start Jfr")) { + throw new Exception("Expected failure on initialization of native JFR"); + } + } + } +}