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 TestExplicitGC
  27  * @summary Test that Shenandoah reacts to explicit GC flags appropriately
  28  * @key gc
  29  * @requires vm.gc.Shenandoah & !vm.graal.enabled
  30  * @library /test/lib
  31  * @modules java.base/jdk.internal.misc
  32  *          java.management
  33  * @run driver TestExplicitGC
  34  */
  35 
  36 import jdk.test.lib.process.ProcessTools;
  37 import jdk.test.lib.process.OutputAnalyzer;
  38 
  39 public class TestExplicitGC {
  40 
  41     enum Mode {
  42         PRODUCT,
  43         DIAGNOSTIC,
  44         EXPERIMENTAL,
  45     }
  46 
  47     public static void main(String[] args) throws Exception {
  48         if (args.length > 0) {
  49             System.out.println("Calling System.gc()");
  50             System.gc();
  51             return;
  52         }
  53 
  54         String[] full = new String[] {
  55                 "Pause Full"
  56         };
  57 
  58         String[] concNormal = new String[] {
  59                 "Pause Init Mark",
  60                 "Pause Final Mark",
  61         };
  62 
  63         {
  64             ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
  65                     "-XX:+UnlockExperimentalVMOptions",
  66                     "-XX:+UseShenandoahGC",
  67                     "-Xlog:gc",
  68                     TestExplicitGC.class.getName(),
  69                     "test");
  70             OutputAnalyzer output = new OutputAnalyzer(pb.start());
  71             for (String p : full) {
  72                 output.shouldNotContain(p);
  73             }
  74             for (String p : concNormal) {
  75                 output.shouldContain(p);
  76             }
  77         }
  78 
  79         {
  80             ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
  81                     "-XX:+UnlockExperimentalVMOptions",
  82                     "-XX:+UseShenandoahGC",
  83                     "-Xlog:gc",
  84                     "-XX:+DisableExplicitGC",
  85                     TestExplicitGC.class.getName(),
  86                     "test");
  87             OutputAnalyzer output = new OutputAnalyzer(pb.start());
  88             for (String p : full) {
  89                 output.shouldNotContain(p);
  90             }
  91             for (String p : concNormal) {
  92                 output.shouldNotContain(p);
  93             }
  94         }
  95 
  96         {
  97             ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
  98                     "-XX:+UnlockExperimentalVMOptions",
  99                     "-XX:+UseShenandoahGC",
 100                     "-Xlog:gc",
 101                     "-XX:+ExplicitGCInvokesConcurrent",
 102                     TestExplicitGC.class.getName(),
 103                     "test");
 104             OutputAnalyzer output = new OutputAnalyzer(pb.start());
 105             for (String p : full) {
 106                 output.shouldNotContain(p);
 107             }
 108             for (String p : concNormal) {
 109                 output.shouldContain(p);
 110             }
 111         }
 112 
 113         {
 114             ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
 115                     "-XX:+UnlockExperimentalVMOptions",
 116                     "-XX:+UseShenandoahGC",
 117                     "-Xlog:gc",
 118                     "-XX:-ExplicitGCInvokesConcurrent",
 119                     TestExplicitGC.class.getName(),
 120                     "test");
 121             OutputAnalyzer output = new OutputAnalyzer(pb.start());
 122             for (String p : full) {
 123                 output.shouldContain(p);
 124             }
 125             for (String p : concNormal) {
 126                 output.shouldNotContain(p);
 127             }
 128         }
 129     }
 130 }