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
  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
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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 /test/lib
  32  */
  33 
  34 import jdk.test.lib.process.ProcessTools;
  35 import jdk.test.lib.process.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 }