TestNoRTMLockElidingOption.java

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/**
 * @test
 * @bug 8031320
 * @summary Verify that NoRTMLockEliding option could be applied to
 *          specified method and that such method will not use rtm.
 * @library /test/lib /
 * @modules java.base/jdk.internal.misc
 *          java.management
 * @requires vm.rtm.cpu & vm.rtm.compiler
 * @build sun.hotspot.WhiteBox
 * @run driver jdk.test.lib.helpers.ClassFileInstaller sun.hotspot.WhiteBox
 * @run main/othervm/native -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
 *                          -XX:+WhiteBoxAPI
 *                          compiler.rtm.method_options.TestNoRTMLockElidingOption
 */

package compiler.rtm.method_options;

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 jdk.test.lib.cli.CommandLineOptionTest;

import java.util.List;

/**
 * Test verifies that method tagged with option <i>NoRTMLockElidingOption</i>
 * will not use RTM-based lock elision.
 * Test invokes compiled method and checks that no deoptimization with
 * <i>rtm_state_change</i> reason had happened and that that VM output
 * does not contain RTM locking statistics for compiled method.
 */
public class TestNoRTMLockElidingOption {

    public void runTestCases() throws Throwable {
        verifyOption(false);
        verifyOption(true);
    }

    public void verifyOption(boolean useStackLock) throws Throwable {
        AbortProvoker provoker = AbortType.XABORT.provoker();
        String logFileName = String.format("rtm_deopt_%s_stack_lock.xml",
                (useStackLock ? "use" : "no"));
        String methodOption = String.format("-XX:CompileCommand=option," +
                "%s,NoRTMLockEliding", provoker.getMethodWithLockName());

        OutputAnalyzer outputAnalyzer = RTMTestBase.executeRTMTest(
                logFileName,
                provoker,
                CommandLineOptionTest.prepareBooleanFlag("UseRTMForStackLocks",
                        useStackLock),
                methodOption,
                "-XX:RTMTotalCountIncrRate=1",
                "-XX:+UseRTMDeopt",
                "-XX:+PrintPreciseRTMLockingStatistics",
                AbortProvoker.class.getName(),
                AbortType.XABORT.toString(),
                Boolean.toString(!useStackLock)
        );

        outputAnalyzer.shouldHaveExitValue(0);

        int firedTraps = RTMTestBase.firedRTMStateChangeTraps(logFileName);

        Asserts.assertEQ(firedTraps, 0,
                "No deoptimizations with rtm_state_change reason are expected");

        List<RTMLockingStatistics> statistics = RTMLockingStatistics.fromString(
                provoker.getMethodWithLockName(), outputAnalyzer.getOutput());

        Asserts.assertEQ(statistics.size(), 0,
                "VM output should not contain RTM locking statistics entries "
                + "for method " + provoker.getMethodWithLockName());
    }

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