/*

 * 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.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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 */

/**

 * @test

 * @bug 8031320

 * @summary Verify that rtm locking is used for stack locks before

 *          inflation and after it used for inflated locks.

 * @library /test/lib /

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

 *          java.management

 * @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.TestUseRTMAfterLockInflation

 */

package compiler.rtm.locking;

import compiler.testlibrary.rtm.AbortProvoker;

import compiler.testlibrary.rtm.AbortType;

import compiler.testlibrary.rtm.RTMLockingStatistics;

import compiler.testlibrary.rtm.RTMTestBase;

import jdk.test.lib.Asserts;

import jdk.test.lib.process.OutputAnalyzer;

import java.util.List;

/**

 * Test verifies that RTM is used after lock inflation by executing compiled

 * method with RTM-based lock elision using stack lock first, then that lock

 * is inflated and the same compiled method invoked again.

 *

 * Compiled method invoked {@code AbortProvoker.DEFAULT_ITERATIONS} times before

 * lock inflation and the same amount of times after inflation.

 * As a result total locks count should be equal to

 * {@code 2 * AbortProvoker.DEFAULT_ITERATIONS}.

 * It is a pretty strict assertion which could fail if some retriable abort

 * happened: it could be {@code AbortType.RETRIABLE} or

 * {@code AbortType.MEM_CONFLICT}, but unfortunately abort can has both these

 * reasons simultaneously. In order to avoid false negative failures related

 * to incorrect aborts counting, -XX:RTMRetryCount=0 is used.

 */

public class TestUseRTMAfterLockInflation {

    private static final long EXPECTED_LOCKS

            = 2L * AbortProvoker.DEFAULT_ITERATIONS;

    protected void runTestCases() throws Throwable {

        AbortProvoker provoker = AbortType.XABORT.provoker();

        long totalLocksCount = 0;

        OutputAnalyzer outputAnalyzer = RTMTestBase.executeRTMTest(

                provoker,

                "-XX:+UseRTMForStackLocks",

                "-XX:RTMTotalCountIncrRate=1",

                "-XX:RTMRetryCount=0",

                "-XX:+PrintPreciseRTMLockingStatistics",

                Test.class.getName(),

                AbortType.XABORT.toString());

        outputAnalyzer.shouldHaveExitValue(0);

        List<RTMLockingStatistics> statistics = RTMLockingStatistics.fromString(

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

        Asserts.assertEQ(statistics.size(), 2,

                "VM output should contain two rtm locking statistics entries "

                + "for method " + provoker.getMethodWithLockName());

        for (RTMLockingStatistics s : statistics) {

            totalLocksCount += s.getTotalLocks();

        }

        Asserts.assertEQ(totalLocksCount,

                TestUseRTMAfterLockInflation.EXPECTED_LOCKS,

                "Total lock count should be greater or equal to "

                + TestUseRTMAfterLockInflation.EXPECTED_LOCKS);

    }

    public static class Test {

        /**

         * Usage:

         * Test <provoker type>

         */

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

            Asserts.assertGT(args.length, 0,

                    "AbortType name is expected as first argument.");

            AbortProvoker provoker

                    = AbortType.lookup(Integer.valueOf(args[0])).provoker();

            for (int i = 0; i < AbortProvoker.DEFAULT_ITERATIONS; i++) {

                AbortProvoker.verifyMonitorState(provoker, false /*deflated*/);

                provoker.forceAbort();

            }

            provoker.inflateMonitor();

            for (int i = 0; i < AbortProvoker.DEFAULT_ITERATIONS; i++) {

                AbortProvoker.verifyMonitorState(provoker, true /*inflated*/);

                provoker.forceAbort();

            }

        }

    }

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

        new TestUseRTMAfterLockInflation().runTestCases();

    }

}