/*

 * 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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 */

/*

 * @test OverloadCompileQueueTest

 * @summary stressing code cache by overloading compile queues

 * @modules java.base/jdk.internal.misc

 *          java.management

 *

 * @ignore 8071905

 * @run driver ClassFileInstaller sun.hotspot.WhiteBox

 *                                sun.hotspot.WhiteBox$WhiteBoxPermission

 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions

 *                   -XX:+WhiteBoxAPI

 *                   -XX:CompileCommand=dontinline,compiler.codecache.stress.Helper$TestCase::method

 *                   -XX:-SegmentedCodeCache

 *                   compiler.codecache.stress.OverloadCompileQueueTest

 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions

 *                   -XX:+WhiteBoxAPI

 *                   -XX:CompileCommand=dontinline,compiler.codecache.stress.Helper$TestCase::method

 *                   -XX:+SegmentedCodeCache

 *                   compiler.codecache.stress.OverloadCompileQueueTest

 */

package compiler.codecache.stress;

import jdk.test.lib.Platform;

import java.lang.reflect.Method;

import java.util.stream.IntStream;

public class OverloadCompileQueueTest implements Runnable {

    private static final int MAX_SLEEP = 10000;

    private static final String METHOD_TO_ENQUEUE = "method";

    private static final int LEVEL_SIMPLE = 1;

    private static final int LEVEL_FULL_OPTIMIZATION = 4;

    private static final boolean TIERED_COMPILATION

            = Helper.WHITE_BOX.getBooleanVMFlag("TieredCompilation");

    private static final int TIERED_STOP_AT_LEVEL

            = Helper.WHITE_BOX.getIntxVMFlag("TieredStopAtLevel").intValue();

    private static final int[] AVAILABLE_LEVELS;

    static {

        if (TIERED_COMPILATION) {

            AVAILABLE_LEVELS = IntStream

                    .rangeClosed(LEVEL_SIMPLE, TIERED_STOP_AT_LEVEL)

                    .toArray();

        } else if (Platform.isServer()) {

            AVAILABLE_LEVELS = new int[] { LEVEL_FULL_OPTIMIZATION };

        } else if (Platform.isClient() || Platform.isMinimal()) {

            AVAILABLE_LEVELS = new int[] { LEVEL_SIMPLE };

        } else {

            throw new Error("TESTBUG: unknown VM: " + Platform.vmName);

        }

    }

    public static void main(String[] args) {

        if (Platform.isInt()) {

            throw new Error("TESTBUG: test can not be run in interpreter");

        }

        new CodeCacheStressRunner(new OverloadCompileQueueTest()).runTest();

    }

    public OverloadCompileQueueTest() {

        Helper.startInfiniteLoopThread(this::lockUnlock, 100L);

    }

    @Override

    public void run() {

        Helper.TestCase obj = Helper.TestCase.get();

        Class clazz = obj.getClass();

        Method mEnqueue;

        try {

            mEnqueue = clazz.getMethod(METHOD_TO_ENQUEUE);

        } catch (NoSuchMethodException | SecurityException e) {

            throw new Error(String.format(

                    "TESTBUG: cannot get method '%s' of class %s",

                    METHOD_TO_ENQUEUE, clazz.getName()), e);

        }

        for (int compLevel : AVAILABLE_LEVELS) {

            Helper.WHITE_BOX.enqueueMethodForCompilation(mEnqueue, compLevel);

        }

    }

    private void lockUnlock() {

        try {

            int sleep = Helper.RNG.nextInt(MAX_SLEEP);

            Helper.WHITE_BOX.lockCompilation();

            Thread.sleep(sleep);

        } catch (InterruptedException e) {

            throw new Error("TESTBUG: lockUnlocker thread was unexpectedly interrupted", e);

        } finally {

            Helper.WHITE_BOX.unlockCompilation();

        }

    }

}