1 /*
   2  * Copyright (c) 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 TestClassUnloadingArguments
  26  * @summary Test that loop mining arguments are sane
  27  * @key gc
  28  * @library /testlibrary
  29  *
  30  * @run driver TestClassUnloadingArguments
  31  */
  32 
  33 import java.util.*;
  34 
  35 import com.oracle.java.testlibrary.*;
  36 
  37 public class TestClassUnloadingArguments {
  38 
  39     public static void testWith(String msg, boolean cu, boolean cuConc, String... args) throws Exception {
  40         String[] cmds = Arrays.copyOf(args, args.length + 3);
  41         cmds[args.length] = "-Xmx128m";
  42         cmds[args.length + 1] = "-XX:+PrintFlagsFinal";
  43         cmds[args.length + 2] = "-version";
  44         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(cmds);
  45         OutputAnalyzer output = new OutputAnalyzer(pb.start());
  46         output.shouldHaveExitValue(0);
  47         output.shouldContain("ClassUnloading");
  48         output.shouldContain("ClassUnloadingWithConcurrentMark");
  49 
  50         Asserts.assertEQ(output.firstMatch("(.+?) ClassUnloading.+?= (.+?) (.+?)", 2),
  51                 Boolean.toString(cu),
  52                 msg + ", but got wrong ClassUnloading");
  53         Asserts.assertEQ(output.firstMatch("(.+?) ClassUnloadingWithConcurrentMark.+?= (.+?) (.+?)", 2),
  54                 Boolean.toString(cuConc),
  55                 msg + ", but got wrong ClassUnloadingWithConcurrentMark");
  56     }
  57 
  58     public static void main(String[] args) throws Exception {
  59         testDefaultGC();
  60         testShenandoah();
  61     }
  62 
  63     public static void testDefaultGC() throws Exception {
  64         testWith("Default GC should have class unloading enabled",
  65                 true, true);
  66 
  67 // Not in JDK 8 and Parallel GC
  68 //        testWith("Default GC should disable everything",
  69 //            false, false,
  70 //            "-XX:-ClassUnloading");
  71 
  72         testWith("Default GC should disable conc unload",
  73                 true, false,
  74                 "-XX:-ClassUnloadingWithConcurrentMark");
  75 
  76 // Not in JDK 8 and Parallel GC
  77 //        testWith("Default GC should not let conc unload to be enabled separately",
  78 //            false, false,
  79 //            "-XX:-ClassUnloading",
  80 //            "-XX:+ClassUnloadingWithConcurrentMark");
  81     }
  82 
  83     public static void testShenandoah() throws Exception {
  84         testWith("Shenandoah GC should have class unloading enabled",
  85                 true, true,
  86                 "-XX:+UnlockExperimentalVMOptions",
  87                 "-XX:+UseShenandoahGC");
  88 
  89         testWith("Shenandoah GC should disable everything",
  90                 false, false,
  91                 "-XX:+UnlockExperimentalVMOptions",
  92                 "-XX:+UseShenandoahGC",
  93                 "-XX:-ClassUnloading");
  94 
  95         testWith("Shenandoah GC should enable conc unload",
  96                 true, true,
  97                 "-XX:+UnlockExperimentalVMOptions",
  98                 "-XX:+UseShenandoahGC",
  99                 "-XX:+ClassUnloadingWithConcurrentMark");
 100 
 101         testWith("Shenandoah GC should not let conc unload to be enabled separately",
 102                 false, false,
 103                 "-XX:+UnlockExperimentalVMOptions",
 104                 "-XX:+UseShenandoahGC",
 105                 "-XX:-ClassUnloading",
 106                 "-XX:+ClassUnloadingWithConcurrentMark");
 107     }
 108 
 109 }