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 * @test CdsSameObjectAlignment

 * @summary Testing CDS (class data sharing) using varying object alignment.

 *          Using same object alignment for each dump/load pair

 * @requires (vm.opt.UseCompressedOops == null) | (vm.opt.UseCompressedOops == true)

 * @library /test/lib

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

 *          java.management

 */

import jdk.test.lib.Platform;

import jdk.test.lib.cds.CDSTestUtils;

import jdk.test.lib.process.OutputAnalyzer;

public class CdsSameObjectAlignment {

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

        String nativeWordSize = System.getProperty("sun.arch.data.model");

        if (!Platform.is64bit()) {

            System.out.println("ObjectAlignmentInBytes for CDS is only " +

                "supported on 64bit platforms; this plaform is " +

                nativeWordSize);

            System.out.println("Skipping the test");

        } else {

            dumpAndLoadSharedArchive(8);

            dumpAndLoadSharedArchive(16);

            dumpAndLoadSharedArchive(32);

            dumpAndLoadSharedArchive(64);

        }

    }

    private static void

    dumpAndLoadSharedArchive(int objectAlignmentInBytes) throws Exception {

        String objectAlignmentArg = "-XX:ObjectAlignmentInBytes="

            + objectAlignmentInBytes;

        System.out.println("dumpAndLoadSharedArchive(): objectAlignmentInBytes = "

            + objectAlignmentInBytes);

        CDSTestUtils.createArchiveAndCheck(objectAlignmentArg);

        CDSTestUtils.runWithArchiveAndCheck(objectAlignmentArg);

    }

}