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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

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 * particular file as subject to the "Classpath" exception as provided

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 *

 * 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).

 *

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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

 * @requires vm.hasJFR

 * @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");

            }

        }

    }

}