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 * Copyright (c) 2018, 2019, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * 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

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 */

package gc.arguments;

/*

 * @test TestParallelRefProc

 * @key gc

 * @summary Test defaults processing for -XX:+ParallelRefProcEnabled.

 * @library /test/lib

 * @library /

 * @build sun.hotspot.WhiteBox

 * @run driver ClassFileInstaller sun.hotspot.WhiteBox sun.hotspot.WhiteBox$WhiteBoxPermission

 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI gc.arguments.TestParallelRefProc

 */

import java.util.Arrays;

import java.util.ArrayList;

import jdk.test.lib.process.OutputAnalyzer;

import jdk.test.lib.process.ProcessTools;

import jtreg.SkippedException;

import sun.hotspot.gc.GC;

public class TestParallelRefProc {

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

        boolean noneGCSupported = true;

        if (GC.Serial.isSupported()) {

            noneGCSupported = false;

            testFlag(new String[] { "-XX:+UseSerialGC" }, false);

        }

        if (GC.Parallel.isSupported()) {

            noneGCSupported = false;

            testFlag(new String[] { "-XX:+UseParallelGC" }, false);

        }

        if (GC.G1.isSupported()) {

            noneGCSupported = false;

            testFlag(new String[] { "-XX:+UseG1GC", "-XX:ParallelGCThreads=1" }, false);

            testFlag(new String[] { "-XX:+UseG1GC", "-XX:ParallelGCThreads=2" }, true);

            testFlag(new String[] { "-XX:+UseG1GC", "-XX:-ParallelRefProcEnabled", "-XX:ParallelGCThreads=2" }, false);

        }

        if (noneGCSupported) {

        }

    }

    private static final String parallelRefProcEnabledPattern =

        " *bool +ParallelRefProcEnabled *= *true +\\{product\\}";

    private static final String parallelRefProcDisabledPattern =

        " *bool +ParallelRefProcEnabled *= *false +\\{product\\}";

    private static void testFlag(String[] args, boolean expectedTrue) throws Exception {

        ArrayList<String> result = new ArrayList<String>();

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

        result.add("-XX:+PrintFlagsFinal");

        result.add("-version");

        ProcessBuilder pb = GCArguments.createJavaProcessBuilder(result.toArray(new String[0]));

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

        output.shouldHaveExitValue(0);

        final String expectedPattern = expectedTrue ? parallelRefProcEnabledPattern : parallelRefProcDisabledPattern;

        String value = output.firstMatch(expectedPattern);

        if (value == null) {

            throw new RuntimeException(

                Arrays.toString(args) + " didn't set ParallelRefProcEnabled to " + expectedTrue + " as expected");

        }

    }

}