1 /*
   2  * Copyright (c) 2017, 2018, Red Hat, Inc. 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 /*
  26  * @test TestExplicitGCNoConcurrent
  27  * @summary Test that Shenandoah reacts to explicit GC flags appropriately
  28  * @requires vm.gc.Shenandoah & !vm.graal.enabled
  29  * @library /test/lib
  30  * @modules java.base/jdk.internal.misc
  31  *          java.management
  32  * @run driver TestExplicitGCNoConcurrent
  33  */
  34 
  35 import jdk.test.lib.process.ProcessTools;
  36 import jdk.test.lib.process.OutputAnalyzer;
  37 
  38 public class TestExplicitGCNoConcurrent {
  39 
  40     public static void main(String[] args) throws Exception {
  41         if (args.length > 0) {
  42             System.out.println("Calling System.gc()");
  43             System.gc();
  44             return;
  45         }
  46 
  47         String[] concurrent = new String[] {
  48                 "Pause Init Mark",
  49                 "Pause Final Mark",
  50                 "Pause Init Update Refs",
  51                 "Pause Final Update Refs",
  52                 "Pause Init Traversal",
  53                 "Pause Final Traversal",
  54         };
  55 
  56         String[] opts = new String[] {
  57                 "",
  58                 "-XX:-ExplicitGCInvokesConcurrent",
  59                 "-XX:+ExplicitGCInvokesConcurrent"
  60         };
  61 
  62         for (String opt : opts) {
  63             ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
  64                     "-Xmx128m",
  65                     "-XX:+UnlockExperimentalVMOptions",
  66                     "-XX:+UseShenandoahGC",
  67                     "-Xlog:gc",
  68                     "-XX:+UnlockDiagnosticVMOptions",
  69                     opt,
  70                     "-XX:ShenandoahGCHeuristics=passive",
  71                     TestExplicitGCNoConcurrent.class.getName(),
  72                     "test");
  73             OutputAnalyzer output = new OutputAnalyzer(pb.start());
  74             for (String p : concurrent) {
  75                 output.shouldNotContain(p);
  76             }
  77         }
  78     }
  79 }