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 TestSelectiveBarrierFlags
  26  * @summary Test selective barrier enabling works, by aggressively compiling HelloWorld with combinations
  27  *          of barrier flags
  28  * @library /testlibrary
  29  *
  30  * @run main/othervm TestSelectiveBarrierFlags -Xint
  31  * @run main/othervm TestSelectiveBarrierFlags -Xbatch -XX:CompileThreshold=100 -XX:TieredStopAtLevel=1
  32  * @run main/othervm TestSelectiveBarrierFlags -Xbatch -XX:CompileThreshold=100 -XX:-TieredCompilation -XX:+IgnoreUnrecognizedVMOptions -XX:+ShenandoahVerifyOptoBarriers
  33  */
  34 
  35 import java.util.*;
  36 import java.util.concurrent.*;
  37 import com.oracle.java.testlibrary.*;
  38 
  39 public class TestSelectiveBarrierFlags {
  40 
  41     public static void main(String[] args) throws Exception {
  42         String[][] opts = {
  43                 new String[]{ "ShenandoahLoadRefBarrier" },
  44                 new String[] { "ShenandoahSATBBarrier", "ShenandoahStoreValEnqueueBarrier" },
  45                 new String[]{ "ShenandoahCASBarrier" },
  46                 new String[]{ "ShenandoahCloneBarrier" },
  47         };
  48 
  49         int size = 1;
  50         for (String[] l : opts) {
  51             size *= (l.length + 1);
  52         }
  53 
  54         ExecutorService pool = Executors.newFixedThreadPool(Runtime.getRuntime().availableProcessors());
  55 
  56         for (int c = 0; c < size; c++) {
  57             int t = c;
  58 
  59             List<String> conf = new ArrayList<>();
  60             conf.addAll(Arrays.asList(args));
  61             conf.add("-Xmx128m");
  62             conf.add("-XX:+UnlockDiagnosticVMOptions");
  63             conf.add("-XX:+UnlockExperimentalVMOptions");
  64             conf.add("-XX:+UseShenandoahGC");
  65             conf.add("-XX:ShenandoahGCMode=passive");
  66 
  67             StringBuilder sb = new StringBuilder();
  68             for (String[] l : opts) {
  69                 // Make a choice which flag to select from the group.
  70                 // Zero means no flag is selected from the group.
  71                 int choice = t % (l.length + 1);
  72                 for (int e = 0; e < l.length; e++) {
  73                     conf.add("-XX:" + ((choice == (e + 1)) ? "+" : "-") + l[e]);
  74                 }
  75                 t = t / (l.length + 1);
  76             }
  77 
  78             conf.add("TestSelectiveBarrierFlags$Test");
  79 
  80             pool.submit(() -> {
  81                 try {
  82                     ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(conf.toArray(new String[0]));
  83                     OutputAnalyzer output = new OutputAnalyzer(pb.start());
  84                     output.shouldHaveExitValue(0);
  85                 } catch (Exception e) {
  86                     e.printStackTrace();
  87                     System.exit(1);
  88                 }
  89             });
  90         }
  91 
  92         pool.shutdown();
  93         pool.awaitTermination(1, TimeUnit.HOURS);
  94     }
  95 
  96     public static class Test {
  97         public static void main(String... args) {
  98             System.out.println("HelloWorld");
  99         }
 100     }
 101 
 102 }