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 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.

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

 *

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 *

 * 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 UseRTMXendForLockBusy option affects

 *          method behaviour if lock is busy.

 * @build TestUseRTMXendForLockBusy

 * @run main ClassFileInstaller sun.hotspot.WhiteBox

 *                              sun.hotspot.WhiteBox$WhiteBoxPermission

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

 *                   -XX:+WhiteBoxAPI TestUseRTMXendForLockBusy

 */

import java.util.List;

import com.oracle.java.testlibrary.*;

import com.oracle.java.testlibrary.cli.CommandLineOptionTest;

import com.oracle.java.testlibrary.cli.predicate.AndPredicate;

import rtm.*;

import rtm.predicate.SupportedCPU;

import rtm.predicate.SupportedVM;

/**

 * Test verifies that with +UseRTMXendForLockBusy there will be no aborts

 * forced by the test.

 */

public class TestUseRTMXendForLockBusy extends CommandLineOptionTest {

    private final static int LOCKING_TIME = 5000;

    private TestUseRTMXendForLockBusy() {

        super(new AndPredicate(new SupportedVM(), new SupportedCPU()));

    }

    @Override

    protected void runTestCases() throws Throwable {

        // inflated lock, xabort on lock busy

        verifyXendForLockBusy(true, false);

        // inflated lock, xend on lock busy

        verifyXendForLockBusy(true, true);

        // stack lock, xabort on lock busy

        verifyXendForLockBusy(false, false);

        // stack lock, xend on lock busy

        verifyXendForLockBusy(false, true);

    }

    private void verifyXendForLockBusy(boolean inflateMonitor,

            boolean useXend) throws Throwable {

        CompilableTest test = new BusyLock();

        OutputAnalyzer outputAnalyzer = RTMTestBase.executeRTMTest(

                test,

                CommandLineOptionTest.prepareBooleanFlag("UseRTMForStackLocks",

                        inflateMonitor),

                CommandLineOptionTest.prepareBooleanFlag(

                        "UseRTMXendForLockBusy",

                        useXend),

                "-XX:RTMRetryCount=0",

                "-XX:RTMTotalCountIncrRate=1",

                "-XX:+PrintPreciseRTMLockingStatistics",

                BusyLock.class.getName(),

                Boolean.toString(inflateMonitor),

                Integer.toString(TestUseRTMXendForLockBusy.LOCKING_TIME)

        );

        outputAnalyzer.shouldHaveExitValue(0);

        List<RTMLockingStatistics> statistics = RTMLockingStatistics.fromString(

                test.getMethodWithLockName(), outputAnalyzer.getOutput());

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

                + "exactly one rtm locking statistics entry for method "

                + test.getMethodWithLockName());

        long aborts = statistics.get(0).getAborts(AbortType.XABORT);

        if (useXend) {

            Asserts.assertEQ(aborts, 0L,

                    "Expected to get no aborts on busy lock");

        } else {

            Asserts.assertGT(aborts, 0L,

                    "Expected to get at least one abort on busy lock");

        }

    }

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

        new TestUseRTMXendForLockBusy().test();

    }

}