1 /*

     2  * Copyright (c) 2015, 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

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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 /*

    25  * @test TestInitialGCThreadLogging

    26  * @bug 8157240

    27  * @summary Check trace logging of initial GC threads.

    28  * @requires vm.gc=="null"

    29  * @key gc

    30  * @modules java.base/jdk.internal.misc

    31  * @library /testlibrary

    32  */

    33 

    34 import jdk.test.lib.ProcessTools;

    35 import jdk.test.lib.OutputAnalyzer;

    36 

    37 public class TestInitialGCThreadLogging {

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

    39 

    40     testInitialGCThreadLogging("UseConcMarkSweepGC", "GC Thread");

    41 

    42     testInitialGCThreadLogging("UseG1GC", "GC Thread");

    43 

    44     testInitialGCThreadLogging("UseParallelGC", "ParGC Thread");

    45   }

    46 

    47   private static void verifyDynamicNumberOfGCThreads(OutputAnalyzer output, String threadName) {

    48     output.shouldHaveExitValue(0); // test should run succesfully

    49     output.shouldContain(threadName);

    50   }

    51 

    52   private static void testInitialGCThreadLogging(String gcFlag, String threadName) throws Exception {

    53     // UseDynamicNumberOfGCThreads and TraceDynamicGCThreads enabled

    54     String[] baseArgs = {"-XX:+" + gcFlag, "-Xmx10M", "-XX:+UseDynamicNumberOfGCThreads", "-Xlog:gc+task=trace", "-version"};

    55 

    56     // Base test with gc and +UseDynamicNumberOfGCThreads:

    57     ProcessBuilder pb_enabled = ProcessTools.createJavaProcessBuilder(baseArgs);

    58     verifyDynamicNumberOfGCThreads(new OutputAnalyzer(pb_enabled.start()), threadName);

    59   }

    60 }