1 /*
   2  * Copyright (c) 2017, 2018, Red Hat, Inc. All rights reserved.
   3  *
   4  * This code is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License version 2 only, as
   6  * published by the Free Software Foundation.
   7  *
   8  * This code is distributed in the hope that it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  11  * version 2 for more details (a copy is included in the LICENSE file that
  12  * accompanied this code).
  13  *
  14  * You should have received a copy of the GNU General Public License version
  15  * 2 along with this work; if not, write to the Free Software Foundation,
  16  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  17  *
  18  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  19  * or visit www.oracle.com if you need additional information or have any
  20  * questions.
  21  *
  22  */
  23 
  24 /*
  25  * @test TestExplicitGCNoConcurrent
  26  * @summary Test that Shenandoah reacts to explicit GC flags appropriately
  27  * @key gc
  28  * @library /testlibrary
  29  *
  30  * @run driver TestExplicitGCNoConcurrent
  31  */
  32 
  33 import com.oracle.java.testlibrary.*;
  34 
  35 public class TestExplicitGCNoConcurrent {
  36 
  37     public static void main(String[] args) throws Exception {
  38         if (args.length > 0) {
  39             System.out.println("Calling System.gc()");
  40             System.gc();
  41             return;
  42         }
  43 
  44         String[] concurrent = new String[] {
  45                 "Pause Init Mark",
  46                 "Pause Final Mark",
  47                 "Pause Init Update Refs",
  48                 "Pause Final Update Refs",
  49         };
  50 
  51         String[] opts = new String[] {
  52                 "",
  53                 "-XX:-ExplicitGCInvokesConcurrent",
  54                 "-XX:+ExplicitGCInvokesConcurrent"
  55         };
  56 
  57         for (String opt : opts) {
  58             ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
  59                     "-Xmx128m",
  60                     "-XX:+UnlockExperimentalVMOptions",
  61                     "-XX:+UseShenandoahGC",
  62                     "-verbose:gc",
  63                     "-XX:+UnlockDiagnosticVMOptions",
  64                     opt,
  65                     "-XX:ShenandoahGCHeuristics=passive",
  66                     TestExplicitGCNoConcurrent.class.getName(),
  67                     "test");
  68             OutputAnalyzer output = new OutputAnalyzer(pb.start());
  69             for (String p : concurrent) {
  70                 output.shouldNotContain(p);
  71             }
  72         }
  73     }
  74 }