1 /*
   2  * Copyright (c) 2014, 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  * @test TestGCId
  26  * @bug 8043607
  27  * @summary Ensure that the GCId is logged
  28  * @requires vm.gc=="null"
  29  * @key gc
  30  * @library /test/lib
  31  * @modules java.base/jdk.internal.misc
  32  *          java.management
  33  */
  34 
  35 import jdk.test.lib.process.OutputAnalyzer;
  36 import jdk.test.lib.process.ProcessTools;
  37 
  38 public class TestGCId {
  39   public static void main(String[] args) throws Exception {
  40     testGCId("UseParallelGC");
  41     testGCId("UseG1GC");
  42     testGCId("UseConcMarkSweepGC");
  43     testGCId("UseSerialGC");
  44   }
  45 
  46   private static void verifyContainsGCIDs(OutputAnalyzer output) {
  47     output.shouldMatch("\\[.*\\]\\[.*\\]\\[.*\\] GC\\(0\\) ");
  48     output.shouldMatch("\\[.*\\]\\[.*\\]\\[.*\\] GC\\(1\\) ");
  49     output.shouldHaveExitValue(0);
  50   }
  51 
  52   private static void testGCId(String gcFlag) throws Exception {
  53     ProcessBuilder pb_default =
  54       ProcessTools.createJavaProcessBuilder("-XX:+" + gcFlag, "-Xlog:gc", "-Xmx10M", GCTest.class.getName());
  55     verifyContainsGCIDs(new OutputAnalyzer(pb_default.start()));
  56   }
  57 
  58   static class GCTest {
  59     private static byte[] garbage;
  60     public static void main(String [] args) {
  61       System.out.println("Creating garbage");
  62       // create 128MB of garbage. This should result in at least one GC
  63       for (int i = 0; i < 1024; i++) {
  64         garbage = new byte[128 * 1024];
  65       }
  66       // do a system gc to get one more gc
  67       System.gc();
  68       System.out.println("Done");
  69     }
  70   }
  71 }