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import jdk.test.lib.process.ExitCode;

import jdk.test.lib.cli.CommandLineOptionTest;

/**

 * @test

 * @bug 8031323

 * @summary Verify SurvivorAlignmentInBytes option processing.

 * @library /test/lib

 * @requires vm.opt.SurvivorAlignmentInBytes == null

 *           & vm.opt.ObjectAlignmentInBytes == null

 *           & vm.opt.UnlockExperimentalVMOptions == null

 *           & (vm.opt.IgnoreUnrecognizedVMOptions == null

 *              | vm.opt.IgnoreUnrecognizedVMOptions == "false")

 * @modules java.base/jdk.internal.misc

 *          java.management

 */

public class TestSurvivorAlignmentInBytesOption {

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

        String optionName = "SurvivorAlignmentInBytes";

        String unlockExperimentalVMOpts = "UnlockExperimentalVMOptions";

        String optionIsExperimental

                = CommandLineOptionTest.getExperimentalOptionErrorMessage(

                optionName);

        String valueIsTooSmall= ".*SurvivorAlignmentInBytes.*must be greater"

                + " than or equal to ObjectAlignmentInBytes.*";

        String mustBePowerOf2 = ".*SurvivorAlignmentInBytes.*must be "

                + "power of 2.*";

        // Verify that without -XX:+UnlockExperimentalVMOptions usage of

        // SurvivorAlignmentInBytes option will cause JVM startup failure

        // with the warning message saying that that option is experimental.

        String shouldFailMessage = String.format("JVM option '%s' is "

                + "experimental.%nJVM startup should fail without "

                + "-XX:+UnlockExperimentalVMOptions option", optionName);

        CommandLineOptionTest.verifyJVMStartup(

                new String[]{optionIsExperimental}, null,

                shouldFailMessage, shouldFailMessage,

                ExitCode.FAIL, false,

                "-XX:-UnlockExperimentalVMOptions",

                CommandLineOptionTest.prepareBooleanFlag(

                        unlockExperimentalVMOpts, false),

                CommandLineOptionTest.prepareNumericFlag(optionName, 64));

        // Verify that with -XX:+UnlockExperimentalVMOptions passed to JVM

        // usage of SurvivorAlignmentInBytes option won't cause JVM startup

        // failure.

        String shouldPassMessage = String.format("JVM option '%s' is "

                + "experimental.%nJVM startup should pass with "

                + "-XX:+UnlockExperimentalVMOptions option", optionName);

        String noWarningMessage = "There should be no warnings when use "

                + "with -XX:+UnlockExperimentalVMOptions option";

        CommandLineOptionTest.verifyJVMStartup(

                null, new String[]{optionIsExperimental},

                shouldPassMessage, noWarningMessage,

                ExitCode.OK, false,

                CommandLineOptionTest.prepareBooleanFlag(

                        unlockExperimentalVMOpts, true),

                CommandLineOptionTest.prepareNumericFlag(optionName, 64));

        // Verify that if specified SurvivorAlignmentInBytes is lower than

        // ObjectAlignmentInBytes, then the JVM startup will fail with

        // appropriate error message.

        shouldFailMessage = String.format("JVM startup should fail with "

                + "'%s' option value lower than ObjectAlignmentInBytes", optionName);

        CommandLineOptionTest.verifyJVMStartup(

                new String[]{valueIsTooSmall}, null,

                shouldFailMessage, shouldFailMessage,

                ExitCode.FAIL, false,

                CommandLineOptionTest.prepareBooleanFlag(

                        unlockExperimentalVMOpts, true),

                CommandLineOptionTest.prepareNumericFlag(optionName, 2));

        // Verify that if specified SurvivorAlignmentInBytes value is not

        // a power of 2 then the JVM startup will fail with appropriate error

        // message.

        shouldFailMessage = String.format("JVM startup should fail with "

                + "'%s' option value is not a power of 2", optionName);

        CommandLineOptionTest.verifyJVMStartup(

                new String[]{mustBePowerOf2}, null,

                shouldFailMessage, shouldFailMessage,

                ExitCode.FAIL, false,

                CommandLineOptionTest.prepareBooleanFlag(

                        unlockExperimentalVMOpts, true),

                CommandLineOptionTest.prepareNumericFlag(optionName, 127));

        // Verify that if SurvivorAlignmentInBytes has correct value, then

        // the JVM will be started without errors.

        shouldPassMessage = String.format("JVM startup should pass with "

                + "correct '%s' option value", optionName);

        noWarningMessage = String.format("There should be no warnings when use "

                + "correct '%s' option value", optionName);

        CommandLineOptionTest.verifyJVMStartup(

                null, new String[]{".*SurvivorAlignmentInBytes.*"},

                shouldPassMessage, noWarningMessage,

                ExitCode.OK, false,

                CommandLineOptionTest.prepareBooleanFlag(

                        unlockExperimentalVMOpts, true),

                CommandLineOptionTest.prepareNumericFlag(optionName, 128));

        // Verify that we can setup different SurvivorAlignmentInBytes values.

        for (int alignment = 32; alignment <= 128; alignment *= 2) {

            shouldPassMessage = String.format("JVM startup should pass with "

                    + "'%s' = %d", optionName, alignment);

            CommandLineOptionTest.verifyOptionValue(optionName,

                    Integer.toString(alignment), shouldPassMessage,

                    CommandLineOptionTest.prepareBooleanFlag(

                            unlockExperimentalVMOpts, true),

                    CommandLineOptionTest.prepareNumericFlag(

                            optionName, alignment));

        }

    }

}