1 /*

     2  * Copyright (c) 2016, 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.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 

    24 

    25 /*

    26  * @test StackWalkTest

    27  * @bug 8160064

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

    29  * @library /test/lib

    30  * @run driver StackWalkTest

    31  */

    32 

    33 import jdk.test.lib.process.ProcessTools;

    34 import jdk.test.lib.process.OutputAnalyzer;

    35 

    36 public class StackWalkTest {

    37     static void analyzeOutputOn(ProcessBuilder pb) throws Exception {

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

    39         output.shouldContain("Start walking");

    40         output.shouldContain("fill_in_frames");

    41         output.shouldHaveExitValue(0);

    42     }

    43 

    44     static void analyzeOutputOff(ProcessBuilder pb) throws Exception {

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

    46         output.shouldNotContain("[stackwalk]");

    47         output.shouldHaveExitValue(0);

    48     }

    49 

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

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

    52                                                                   InnerClass.class.getName());

    53         analyzeOutputOn(pb);

    54 

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

    56                                                    InnerClass.class.getName());

    57         analyzeOutputOff(pb);

    58     }

    59 

    60     public static class InnerClass {

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

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

    63             StackWalker sw = StackWalker.getInstance();

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

    65         }

    66     }

    67 }