/*

 * 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 TestPeriodicGC

 * @summary Test that periodic GC is working

 * @key gc

 * @requires vm.gc.Shenandoah

 * @library /test/lib

 * @run driver TestPeriodicGC

 */

import java.util.*;

import jdk.test.lib.Asserts;

import jdk.test.lib.process.ProcessTools;

import jdk.test.lib.process.OutputAnalyzer;

public class TestPeriodicGC {

    public static void testWith(String msg, boolean periodic, String... args) throws Exception {

        String[] cmds = Arrays.copyOf(args, args.length + 2);

        cmds[args.length] = TestPeriodicGC.class.getName();

        cmds[args.length + 1] = "test";

        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(cmds);

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

        output.shouldHaveExitValue(0);

        if (periodic && !output.getOutput().contains("Trigger: Time since last GC")) {

            throw new AssertionError(msg + ": Should have periodic GC in logs");

        }

        if (!periodic && output.getOutput().contains("Trigger: Time since last GC")) {

            throw new AssertionError(msg + ": Should not have periodic GC in logs");

        }

    }

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

        if (args.length > 0 && args[0].equals("test")) {

            Thread.sleep(5000); // stay idle

            return;

        }

        String[] enabled = new String[] {

                "adaptive",

                "compact",

                "static",

                "traversal",

        };

        String[] disabled = new String[] {

                "aggressive",

                "passive",

        };

        for (String h : enabled) {

            testWith("Short period with " + h,

                    true,

                    "-Xlog:gc",

                    "-XX:+UnlockDiagnosticVMOptions",

                    "-XX:+UnlockExperimentalVMOptions",

                    "-XX:+UseShenandoahGC",

                    "-XX:ShenandoahGCHeuristics=" + h,

                    "-XX:ShenandoahGuaranteedGCInterval=1000"

            );

            testWith("Long period with " + h,

                    false,

                    "-Xlog:gc",

                    "-XX:+UnlockDiagnosticVMOptions",

                    "-XX:+UnlockExperimentalVMOptions",

                    "-XX:+UseShenandoahGC",

                    "-XX:ShenandoahGCHeuristics=" + h,

                    "-XX:ShenandoahGuaranteedGCInterval=100000" // deliberately too long

            );

        }

        for (String h : disabled) {

            testWith("Short period with " + h,

                    false,

                    "-Xlog:gc",

                    "-XX:+UnlockDiagnosticVMOptions",

                    "-XX:+UnlockExperimentalVMOptions",

                    "-XX:+UseShenandoahGC",

                    "-XX:ShenandoahGCHeuristics=" + h,

                    "-XX:ShenandoahGuaranteedGCInterval=1000"

            );

        }

    }

}