1 /*

     2  * Copyright (c) 2013, 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.

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     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

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    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

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    23 

    24 /* @test TestG1ZeroPGCTJcmdThreadPrint

    25  * @key gc

    26  * @bug 8005875

    27  * @summary Use jcmd to generate a thread dump of a Java program being run with PGCT=0 to verify 8005875

    28  * @library /testlibrary

    29  * @run main/othervm -XX:+UseG1GC -XX:ParallelGCThreads=0 -XX:+IgnoreUnrecognizedVMOptions TestG1ZeroPGCTJcmdThreadPrint

    30  */

    31 

    32 import com.oracle.java.testlibrary.*;

    33 

    34 public class TestG1ZeroPGCTJcmdThreadPrint {

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

    36 

    37     // Grab the pid from the current java process

    38     String pid = Integer.toString(ProcessTools.getProcessId());

    39 

    40     // Create a ProcessBuilder

    41     ProcessBuilder pb = new ProcessBuilder();

    42 

    43     // Run jcmd <pid> Thread.print

    44     pb.command(JDKToolFinder.getJDKTool("jcmd"), pid, "Thread.print");

    45 

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

    47 

    48     // There shouldn't be a work gang for concurrent marking.

    49     output.shouldNotContain("G1 Parallel Marking Threads");

    50 

    51     // Make sure we didn't crash

    52     output.shouldHaveExitValue(0);

    53   }

    54 }