/*

 * Copyright (c) 2014, 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

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

 * questions.

 *

 */

import java.lang.reflect.Method;

import java.util.stream.IntStream;

import com.oracle.java.testlibrary.Platform;

/*

 * @test OverloadCompileQueueTest

 * @library /testlibrary /../../test/lib

 * @build OverloadCompileQueueTest

 * @run main ClassFileInstaller sun.hotspot.WhiteBox

 *                              sun.hotspot.WhiteBox$WhiteBoxPermission

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

 *                   -XX:CompileCommand=dontinline,Helper$TestCase::method

 *                   -XX:+WhiteBoxAPI -XX:-SegmentedCodeCache OverloadCompileQueueTest

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

 *                   -XX:CompileCommand=dontinline,Helper$TestCase::method

 *                   -XX:+WhiteBoxAPI -XX:+SegmentedCodeCache OverloadCompileQueueTest

 * @summary stressing code cache by overloading compile queues

 */

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 INTERPRETED

            = System.getProperty("java.vm.info").startsWith("interpreted ");

    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(String.format(

                    "TESTBUG: unknown VM: %s", System.getProperty("java.vm.name")));

        }

    }

    public static void main(String[] args) {

        if (INTERPRETED) {

            System.err.println("Test isn't applicable for interpreter. Skip test.");

            return;

        }

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

    }

    public OverloadCompileQueueTest() {

    }

    @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 {

            Helper.WHITE_BOX.lockCompilation();

        } catch (InterruptedException e) {

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

        } finally {

            Helper.WHITE_BOX.unlockCompilation();

        }

    }

}