1 /*
   2  * Copyright (c) 2014, 2018, 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  * @build sun.hotspot.WhiteBox
  34  * @run driver ClassFileInstaller sun.hotspot.WhiteBox sun.hotspot.WhiteBox$WhiteBoxPermission
  35  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI TestGCId
  36  */
  37 
  38 import jdk.test.lib.process.OutputAnalyzer;
  39 import jdk.test.lib.process.ProcessTools;
  40 import sun.hotspot.gc.GC;
  41 
  42 public class TestGCId {
  43   public static void main(String[] args) throws Exception {
  44     testGCId("UseParallelGC");
  45     testGCId("UseG1GC");
  46     testGCId("UseConcMarkSweepGC");
  47     testGCId("UseSerialGC");
  48     if (GC.Shenandoah.isSupported()) {
  49         testGCId("UseShenandoahGC");
  50     }
  51   }
  52 
  53   private static void verifyContainsGCIDs(OutputAnalyzer output) {
  54     output.shouldMatch("\\[.*\\]\\[.*\\]\\[.*\\] GC\\(0\\) ");
  55     output.shouldMatch("\\[.*\\]\\[.*\\]\\[.*\\] GC\\(1\\) ");
  56     output.shouldHaveExitValue(0);
  57   }
  58 
  59   private static void testGCId(String gcFlag) throws Exception {
  60     ProcessBuilder pb_default =
  61       ProcessTools.createJavaProcessBuilder("-XX:+UnlockExperimentalVMOptions", "-XX:+" + gcFlag, "-Xlog:gc", "-Xmx10M", GCTest.class.getName());
  62     verifyContainsGCIDs(new OutputAnalyzer(pb_default.start()));
  63   }
  64 
  65   static class GCTest {
  66     private static byte[] garbage;
  67     public static void main(String [] args) {
  68       System.out.println("Creating garbage");
  69       // create 128MB of garbage. This should result in at least one GC
  70       for (int i = 0; i < 1024; i++) {
  71         garbage = new byte[128 * 1024];
  72       }
  73       // do a system gc to get one more gc
  74       System.gc();
  75       System.out.println("Done");
  76     }
  77   }
  78 }