/*

 * Copyright (c) 2016, 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.

 *

 * 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.

 */

/*

 * @test StackWalkTest

 * @bug 8160064

 * @summary -Xlog:stackwalk should produce logging from the source code

 * @library /test/lib

 * @run driver StackWalkTest

 */

import jdk.test.lib.process.ProcessTools;

import jdk.test.lib.process.OutputAnalyzer;

public class StackWalkTest {

    static void analyzeOutputOn(ProcessBuilder pb) throws Exception {

        OutputAnalyzer output = new OutputAnalyzer(pb.start());

        output.shouldContain("Start walking");

        output.shouldContain("fill_in_frames");

        output.shouldHaveExitValue(0);

    }

    static void analyzeOutputOff(ProcessBuilder pb) throws Exception {

        OutputAnalyzer output = new OutputAnalyzer(pb.start());

        output.shouldNotContain("[stackwalk]");

        output.shouldHaveExitValue(0);

    }

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

        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-Xlog:stackwalk=debug",

                                                                  InnerClass.class.getName());

        analyzeOutputOn(pb);

        pb = ProcessTools.createJavaProcessBuilder("-Xlog:stackwalk=off",

                                                   InnerClass.class.getName());

        analyzeOutputOff(pb);

    }

    public static class InnerClass {

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

            System.out.println("Testing stackwalk.");

            StackWalker sw = StackWalker.getInstance();

            sw.forEach(System.out::println);

        }

    }

}