/*

 * Copyright (c) 2014, 2016, 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.

 *

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 */

/**

 * @test

 * @bug 8031320

 * @summary Verify that RTMRetryCount affects actual amount of retries.

 * @library /test/lib /

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

 *          java.management

 * @requires vm.flavor == "server" & !vm.emulatedClient & vm.rtm.cpu & vm.rtm.os

 * @build sun.hotspot.WhiteBox

 * @run driver ClassFileInstaller sun.hotspot.WhiteBox

 *                                sun.hotspot.WhiteBox$WhiteBoxPermission

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

 *                   -XX:+WhiteBoxAPI

 *                   compiler.rtm.locking.TestRTMRetryCount

 */

package compiler.rtm.locking;

import compiler.testlibrary.rtm.BusyLock;

import compiler.testlibrary.rtm.CompilableTest;

import compiler.testlibrary.rtm.RTMLockingStatistics;

import compiler.testlibrary.rtm.RTMTestBase;

import jdk.test.lib.Asserts;

import jdk.test.lib.process.OutputAnalyzer;

import jdk.test.lib.cli.CommandLineOptionTest;

import java.util.List;

/**

 * Test verifies that RTMRetryCount option actually affects amount of

 * retries on lock busy.

 */

public class TestRTMRetryCount {

    /**

     * Time in ms, during which busy lock will be locked.

     */

    private static final int LOCKING_TIME = 5000;

    private static final boolean INFLATE_MONITOR = true;

    protected void runTestCases() throws Throwable {

        verifyRTMRetryCount(0);

        verifyRTMRetryCount(1);

        verifyRTMRetryCount(5);

        verifyRTMRetryCount(10);

    }

    private void verifyRTMRetryCount(int retryCount) throws Throwable {

        CompilableTest busyLock = new BusyLock();

        long expectedAborts = retryCount + 1L;

        OutputAnalyzer outputAnalyzer = RTMTestBase.executeRTMTest(

                busyLock,

                "-XX:-UseRTMXendForLockBusy",

                "-XX:RTMTotalCountIncrRate=1",

                CommandLineOptionTest.prepareNumericFlag("RTMRetryCount",

                        retryCount),

                "-XX:RTMTotalCountIncrRate=1",

                "-XX:+PrintPreciseRTMLockingStatistics",

                BusyLock.class.getName(),

                Boolean.toString(TestRTMRetryCount.INFLATE_MONITOR),

                Integer.toString(TestRTMRetryCount.LOCKING_TIME)

        );

        outputAnalyzer.shouldHaveExitValue(0);

        List<RTMLockingStatistics> statistics = RTMLockingStatistics.fromString(

                busyLock.getMethodWithLockName(), outputAnalyzer.getStdout());

        Asserts.assertEQ(statistics.size(), 1, "VM output should contain "

                + "exactly one rtm locking statistics entry for method "

                + busyLock.getMethodWithLockName());

        Asserts.assertEQ(statistics.get(0).getTotalAborts(), expectedAborts,

                String.format("It is expected to get %d aborts",

                        expectedAborts));

    }

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

        new TestRTMRetryCount().runTestCases();

    }

}