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 * 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 RTMTotalCountIncrRate option affects

 *          RTM locking statistics.

 * @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.TestRTMTotalCountIncrRate

 */

package compiler.rtm.locking;

import compiler.testlibrary.rtm.AbortProvoker;

import compiler.testlibrary.rtm.CompilableTest;

import compiler.testlibrary.rtm.RTMLockingStatistics;

import compiler.testlibrary.rtm.RTMTestBase;

import jdk.internal.misc.Unsafe;

import jdk.test.lib.Asserts;

import jdk.test.lib.process.OutputAnalyzer;

import jdk.test.lib.cli.CommandLineOptionTest;

import java.util.List;

/**

 * Test verifies that with RTMTotalCountIncrRate=1 RTM locking statistics

 * contains precise information abort attempted locks and that with other values

 * statistics contains information abort non-zero locking attempts.

 * Since assert done for RTMTotalCountIncrRate=1 is pretty strict, test uses

 * -XX:RTMRetryCount=0 to avoid issue with retriable aborts. For more details on

 * that issue see {@link TestUseRTMAfterLockInflation}.

 */

public class TestRTMTotalCountIncrRate {

    protected void runTestCases() throws Throwable {

        verifyLocksCount(1, false);

        verifyLocksCount(64, false);

        verifyLocksCount(128, false);

        verifyLocksCount(1, true);

        verifyLocksCount(64, true);

        verifyLocksCount(128, true);

    }

    private void verifyLocksCount(int incrRate, boolean useStackLock)

            throws Throwable{

        CompilableTest test = new Test();

        OutputAnalyzer outputAnalyzer = RTMTestBase.executeRTMTest(

                test,

                CommandLineOptionTest.prepareBooleanFlag("UseRTMForStackLocks",

                        useStackLock),

                CommandLineOptionTest.prepareNumericFlag(

                        "RTMTotalCountIncrRate", incrRate),

                "-XX:RTMRetryCount=0",

                "-XX:+PrintPreciseRTMLockingStatistics",

                Test.class.getName(),

                Boolean.toString(!useStackLock)

        );

        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());

        RTMLockingStatistics lock = statistics.get(0);

        if (incrRate == 1) {

            Asserts.assertEQ(lock.getTotalLocks(), Test.TOTAL_ITERATIONS,

                    "Total locks should be exactly the same as amount of "

                    + "iterations.");

        }

    }

    public static class Test implements CompilableTest {

        private static final long TOTAL_ITERATIONS = 10000L;

        private static final Unsafe UNSAFE = Unsafe.getUnsafe();

        private final Object monitor = new Object();

        // Following field have to be static in order to avoid escape analysis.

        @SuppressWarnings("UnsuedDeclaration")

        private static int field = 0;

        @Override

        public String getMethodWithLockName() {

            return this.getClass().getName() + "::lock";

        }

        @Override

        public String[] getMethodsToCompileNames() {

            return new String[] { getMethodWithLockName() };

        }

        public void lock(boolean forceAbort) {

            synchronized(monitor) {

                if (forceAbort) {

                    // We're calling native method in order to force

                    // abort. It's done by explicit xabort call emitted

                    // in SharedRuntime::generate_native_wrapper.

                    // If an actual JNI call will be replaced by

                    // intrinsic - we'll be in trouble, since xabort

                    // will be no longer called and test may fail.

                    UNSAFE.pageSize();

                }

                Test.field++;

            }

        }

        /**

         * Usage:

         * Test <inflate monitor>

         */

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

            Asserts.assertGTE(args.length, 1, "One argument required.");

            Test test = new Test();

            boolean shouldBeInflated = Boolean.valueOf(args[0]);

            if (shouldBeInflated) {

                AbortProvoker.inflateMonitor(test.monitor);

            }

            for (long i = 0L; i < Test.TOTAL_ITERATIONS; i++) {

                AbortProvoker.verifyMonitorState(test.monitor,

                        shouldBeInflated);

                // Force abort on first iteration to avoid rare case when

                // there were no aborts and locks count was not incremented

                // with RTMTotalCountIncrRate > 1 (in such case JVM won't

                // print JVM locking statistics).

                test.lock(i == 0);

            }

        }

    }

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

        new TestRTMTotalCountIncrRate().runTestCases();

    }

}