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 * 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

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 * version 2 for more details (a copy is included in the LICENSE file that

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 *

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 * 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 on high abort ratio method will be recompiled

 *          without rtm locking.

 * @library /testlibrary /testlibrary/whitebox /compiler/testlibrary

 * @build TestRTMDeoptOnHighAbortRatio

 * @run main ClassFileInstaller sun.hotspot.WhiteBox

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

 *                   -XX:+WhiteBoxAPI TestRTMDeoptOnHighAbortRatio

 */

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 on high abort ratio method wil be deoptimized with

 * <i>rtm_state_change</i> reason and after that RTM-based lock elision will not

 * be used for that method.

 * This test make asserts on total locks count done by compiled method,

 * so in order to avoid issue with retriable locks -XX:RTMRetryCount=0 is used.

 * For more details on that issue see {@link TestUseRTMAfterLockInflation}.

 */

public class TestRTMDeoptOnHighAbortRatio extends CommandLineOptionTest {

    private static final long ABORT_THRESHOLD

            = AbortProvoker.DEFAULT_ITERATIONS / 2L;

    private TestRTMDeoptOnHighAbortRatio() {

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

    }

    @Override

    protected void runTestCases() throws Throwable {

        verifyDeopt(false);

        verifyDeopt(true);

    }

    private void verifyDeopt(boolean useStackLock) throws Throwable {

        AbortProvoker provoker = AbortType.XABORT.provoker();

        String logFileName = String.format("rtm_deopt_%s_stack_lock.xml",

                (useStackLock ? "use" : "no"));

        OutputAnalyzer outputAnalyzer = RTMTestBase.executeRTMTest(

                logFileName,

                provoker,

                "-XX:+UseRTMDeopt",

                CommandLineOptionTest.prepareBooleanFlag("UseRTMForStackLocks",

                        useStackLock),

                "-XX:RTMRetryCount=0",

                CommandLineOptionTest.prepareNumericFlag("RTMAbortThreshold",

                        TestRTMDeoptOnHighAbortRatio.ABORT_THRESHOLD),

                "-XX:RTMAbortRatio=100",

                "-XX:CompileThreshold=1",

                "-XX:RTMTotalCountIncrRate=1",

                "-XX:+PrintPreciseRTMLockingStatistics",

                AbortProvoker.class.getName(),

                AbortType.XABORT.toString(),

                Boolean.toString(!useStackLock)

        );

        outputAnalyzer.shouldHaveExitValue(0);

        int firedTraps = RTMTestBase.firedRTMStateChangeTraps(logFileName);

        Asserts.assertEQ(firedTraps, 1, "Expected to get only one "

                + "deoptimization due to rtm state change");

        List<RTMLockingStatistics> statistics = RTMLockingStatistics.fromString(

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

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

                + "exactly one RTM locking statistics entry for method "

                + provoker.getMethodWithLockName());

        Asserts.assertEQ(statistics.get(0).getTotalLocks(),

                TestRTMDeoptOnHighAbortRatio.ABORT_THRESHOLD,

                "After AbortThreshold was reached, method should be"

                + " recompiled without rtm lock eliding.");

    }

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

        new TestRTMDeoptOnHighAbortRatio().test();

    }

}