TestUseRTMForStackLocksOptionOnSupportedConfig.java

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/**
 * @test
 * @bug 8031320
 * @summary Verify UseRTMForStackLocks option processing on CPU and OS with
 *          rtm support when VM supports rtm locking.
 * @library /test/lib /
 * @modules java.base/jdk.internal.misc
 *          java.management
 * @requires vm.flagless
 * @requires vm.rtm.cpu & vm.rtm.compiler
 * @run driver compiler.rtm.cli.TestUseRTMForStackLocksOptionOnSupportedConfig
 */

package compiler.rtm.cli;

import jdk.test.lib.process.ExitCode;
import jdk.test.lib.cli.CommandLineOptionTest;

public class TestUseRTMForStackLocksOptionOnSupportedConfig {
    private static final String DEFAULT_VALUE = "false";

    public void runTestCases() throws Throwable {
        String errorMessage
                = CommandLineOptionTest.getExperimentalOptionErrorMessage(
                "UseRTMForStackLocks");
        String warningMessage
                = RTMGenericCommandLineOptionTest.RTM_FOR_STACK_LOCKS_WARNING;

        String shouldFailMessage = " VM option 'UseRTMForStackLocks' is "
                + "experimental%nJVM startup should fail without "
                + "-XX:+UnlockExperimentalVMOptions flag";

        CommandLineOptionTest.verifySameJVMStartup(
                new String[] { errorMessage }, null, shouldFailMessage,
                shouldFailMessage + "%nError message expected", ExitCode.FAIL,
                "-XX:+UseRTMForStackLocks");
        String shouldPassMessage = " VM option 'UseRTMForStackLocks'"
                + " is experimental%nJVM startup should pass with "
                + "-XX:+UnlockExperimentalVMOptions flag";
        // verify that we get a warning when trying to use rtm for stack
        // lock, but not using rtm locking.
        CommandLineOptionTest.verifySameJVMStartup(
                new String[] { warningMessage }, null, shouldPassMessage,
                "There should be warning when trying to use rtm for stack "
                        + "lock, but not using rtm locking", ExitCode.OK,
                CommandLineOptionTest.UNLOCK_EXPERIMENTAL_VM_OPTIONS,
                "-XX:+UseRTMForStackLocks",
                "-XX:-UseRTMLocking");
        // verify that we don't get a warning when no using rtm for stack
        // lock and not using rtm locking.
        CommandLineOptionTest.verifySameJVMStartup(null,
                new String[] { warningMessage }, shouldPassMessage,
                "There should not be any warning when use both "
                        + "-XX:-UseRTMForStackLocks and -XX:-UseRTMLocking "
                        + "flags",
                ExitCode.OK,
                CommandLineOptionTest.UNLOCK_EXPERIMENTAL_VM_OPTIONS,
                "-XX:-UseRTMForStackLocks",
                "-XX:-UseRTMLocking");
        // verify that we don't get a warning when using rtm for stack
        // lock and using rtm locking.
        CommandLineOptionTest.verifySameJVMStartup(null,
                new String[] { warningMessage }, shouldPassMessage,
                "There should not be any warning when use both "
                        + "-XX:+UseRTMForStackLocks and -XX:+UseRTMLocking"
                        + " flags",
                ExitCode.OK,
                CommandLineOptionTest.UNLOCK_EXPERIMENTAL_VM_OPTIONS,
                "-XX:+UseRTMForStackLocks",
                "-XX:+UseRTMLocking");
        // verify that default value if false
        CommandLineOptionTest.verifyOptionValueForSameVM("UseRTMForStackLocks",
                TestUseRTMForStackLocksOptionOnSupportedConfig.DEFAULT_VALUE,
                "Default value of option 'UseRTMForStackLocks' should be false",
                CommandLineOptionTest.UNLOCK_EXPERIMENTAL_VM_OPTIONS);
        // verify that default value is false even with +UseRTMLocking
        CommandLineOptionTest.verifyOptionValueForSameVM("UseRTMForStackLocks",
                TestUseRTMForStackLocksOptionOnSupportedConfig.DEFAULT_VALUE,
                "Default value of option 'UseRTMForStackLocks' should be false",
                CommandLineOptionTest.UNLOCK_EXPERIMENTAL_VM_OPTIONS,
                "-XX:+UseRTMLocking");
        // verify that we can turn the option on
        CommandLineOptionTest.verifyOptionValueForSameVM("UseRTMForStackLocks",
                        "true", "Value of option 'UseRTMForStackLocks' should "
                                + "be able to be set as 'true' when both "
                                + "-XX:+UseRTMForStackLocks and "
                                + "-XX:+UseRTMLocking flags used",
                        CommandLineOptionTest.UNLOCK_EXPERIMENTAL_VM_OPTIONS,
                        "-XX:+UseRTMLocking", "-XX:+UseRTMForStackLocks");
    }

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