/*

 * Copyright (c) 2017, 2018, Red Hat, Inc. All rights reserved.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 *

 */

/* @test TestSelectiveBarrierFlags

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

 *          of barrier flags

 * @key gc

 * @requires vm.gc.Shenandoah

 * @library /test/lib

 * @run main/othervm TestSelectiveBarrierFlags -Xint

 * @run main/othervm TestSelectiveBarrierFlags -Xbatch -XX:CompileThreshold=100 -XX:TieredStopAtLevel=1

 * @run main/othervm TestSelectiveBarrierFlags -Xbatch -XX:CompileThreshold=100 -XX:-TieredCompilation -XX:+IgnoreUnrecognizedVMOptions -XX:+ShenandoahVerifyOptoBarriers

 */

import java.util.*;

import java.util.concurrent.*;

import jdk.test.lib.process.ProcessTools;

import jdk.test.lib.process.OutputAnalyzer;

public class TestSelectiveBarrierFlags {

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

        String[][] opts = {

                new String[] { "ShenandoahKeepAliveBarrier" },

                new String[] { "ShenandoahWriteBarrier" },

                new String[] { "ShenandoahReadBarrier" },

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

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

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

                new String[] { "ShenandoahCASBarrier" },

                new String[] { "ShenandoahAcmpBarrier" },

                new String[] { "ShenandoahCloneBarrier" },

        };

        int size = 1;

        for (String[] l : opts) {

            size *= (l.length + 1);

        }

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

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

            int t = c;

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

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

            conf.add("-Xmx128m");

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

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

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

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

            StringBuilder sb = new StringBuilder();

            for (String[] l : opts) {

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

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

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

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

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

                }

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

            }

            conf.add("TestSelectiveBarrierFlags$Test");

            pool.submit(() -> {

                try {

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

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

                    output.shouldHaveExitValue(0);

                } catch (Exception e) {

                    e.printStackTrace();

                    System.exit(1);

                }

            });

        }

        pool.shutdown();

        pool.awaitTermination(1, TimeUnit.HOURS);

    }

    public static class Test {

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

            System.out.println("HelloWorld");

        }

    }

}