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 /* @test TestSelectiveBarrierFlags

    25  * @summary Test selective barrier enabling works, by aggressively compiling HelloWorld with combinations

    26  *          of barrier flags

    27  * @key gc

    28  * @requires vm.gc.Shenandoah

    29  * @library /test/lib

    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 

    38 import jdk.test.lib.process.ProcessTools;

    39 import jdk.test.lib.process.OutputAnalyzer;

    40 

    41 public class TestSelectiveBarrierFlags {

    42 

    43     public static void main(String[] args) throws Exception {

    44         String[][] opts = {

    45                 new String[] { "ShenandoahKeepAliveBarrier" },

    46                 new String[] { "ShenandoahWriteBarrier" },

    47                 new String[] { "ShenandoahReadBarrier" },

    48                 // StoreValRead+SATB are actually compatible, but we need to protect against

    49                 // StorveValEnqueue+SATB. TODO: Make it better.

    50                 new String[] { "ShenandoahSATBBarrier", "ShenandoahStoreValReadBarrier", "ShenandoahStoreValEnqueueBarrier" },

    51                 new String[] { "ShenandoahCASBarrier" },

    52                 new String[] { "ShenandoahAcmpBarrier" },

    53                 new String[] { "ShenandoahCloneBarrier" },

    54         };

    55 

    56         int size = 1;

    57         for (String[] l : opts) {

    58             size *= (l.length + 1);

    59         }

    60 

    61         ExecutorService pool = Executors.newFixedThreadPool(Runtime.getRuntime().availableProcessors());

    62 

    63         for (int c = 0; c < size; c++) {

    64             int t = c;

    65 

    66             List<String> conf = new ArrayList<>();

    67             conf.addAll(Arrays.asList(args));

    68             conf.add("-Xmx128m");

    69             conf.add("-XX:+UnlockDiagnosticVMOptions");

    70             conf.add("-XX:+UnlockExperimentalVMOptions");

    71             conf.add("-XX:+UseShenandoahGC");

    72             conf.add("-XX:ShenandoahGCHeuristics=passive");

    73 

    74             StringBuilder sb = new StringBuilder();

    75             for (String[] l : opts) {

    76                 // Make a choice which flag to select from the group.

    77                 // Zero means no flag is selected from the group.

    78                 int choice = t % (l.length + 1);

    79                 for (int e = 0; e < l.length; e++) {

    80                     conf.add("-XX:" + ((choice == (e + 1)) ? "+" : "-") + l[e]);

    81                 }

    82                 t = t / (l.length + 1);

    83             }

    84 

    85             conf.add("TestSelectiveBarrierFlags$Test");

    86 

    87             pool.submit(() -> {

    88                 try {

    89                     ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(conf.toArray(new String[0]));

    90                     OutputAnalyzer output = new OutputAnalyzer(pb.start());

    91                     output.shouldHaveExitValue(0);

    92                 } catch (Exception e) {

    93                     e.printStackTrace();

    94                     System.exit(1);

    95                 }

    96             });

    97         }

    98 

    99         pool.shutdown();

   100         pool.awaitTermination(1, TimeUnit.HOURS);

   101     }

   102 

   103     public static class Test {

   104         public static void main(String... args) {

   105             System.out.println("HelloWorld");

   106         }

   107     }

   108 

   109 }