test/compiler/rtm/locking/TestUseRTMForInflatedLocks.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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/**
 * @test
 * @bug 8031320
 * @summary Verify that rtm locking is used for inflated locks.
 * @library /testlibrary /testlibrary/whitebox /compiler/testlibrary
 * @build TestUseRTMForInflatedLocks
 * @run main ClassFileInstaller sun.hotspot.WhiteBox
 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
 *                   -XX:+WhiteBoxAPI TestUseRTMForInflatedLocks
 */

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 RTM-based lock elision could be used for inflated locks
 * by calling compiled method that use RTM-based lock elision and using
 * manually inflated lock.
 * Compiled method invoked {@code AbortProvoker.DEFAULT_ITERATIONS} times,
 * so total locks count should be the same.
 * This test could also be affected by retriable aborts, so -XX:RTMRetryCount=0
 * is used. For more information abort that issue see
 * {@link TestUseRTMAfterLockInflation}.
 */
public class TestUseRTMForInflatedLocks extends CommandLineOptionTest {
    private TestUseRTMForInflatedLocks() {
        super(new AndPredicate(new SupportedCPU(), new SupportedVM()));
    }

    @Override
    protected void runTestCases() throws Throwable {
        AbortProvoker provoker = AbortType.XABORT.provoker();
        RTMLockingStatistics lock;

        OutputAnalyzer outputAnalyzer = RTMTestBase.executeRTMTest(
                provoker,
                "-XX:-UseRTMForStackLocks",
                "-XX:RTMTotalCountIncrRate=1",
                "-XX:RTMRetryCount=0",
                "-XX:+PrintPreciseRTMLockingStatistics",
                AbortProvoker.class.getName(),
                AbortType.XABORT.toString());

        outputAnalyzer.shouldHaveExitValue(0);

        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());

        lock = statistics.get(0);
        Asserts.assertEQ(lock.getTotalLocks(), AbortProvoker.DEFAULT_ITERATIONS,
                "Total lock count should be greater or equal to "
                + AbortProvoker.DEFAULT_ITERATIONS);
    }

    public static void main(String args[]) throws Throwable {
        new TestUseRTMForInflatedLocks().test();
    }
}