1 /*
   2  * Copyright (c) 2013, 2017, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 /*
  25  * @test CdsSameObjectAlignment
  26  * @summary Testing CDS (class data sharing) using varying object alignment.
  27  *          Using same object alignment for each dump/load pair
  28  * @requires (vm.opt.UseCompressedOops == null) | (vm.opt.UseCompressedOops == true)
  29  * @library /test/lib
  30  * @modules java.base/jdk.internal.misc
  31  *          java.management
  32  */
  33 
  34 import jdk.test.lib.Platform;
  35 import jdk.test.lib.cds.CDSTestUtils;
  36 import jdk.test.lib.process.OutputAnalyzer;
  37 
  38 public class CdsSameObjectAlignment {
  39     public static void main(String[] args) throws Exception {
  40         String nativeWordSize = System.getProperty("sun.arch.data.model");
  41         if (!Platform.is64bit()) {
  42             System.out.println("ObjectAlignmentInBytes for CDS is only " +
  43                 "supported on 64bit platforms; this plaform is " +
  44                 nativeWordSize);
  45             System.out.println("Skipping the test");
  46         } else {
  47             dumpAndLoadSharedArchive(8);
  48             dumpAndLoadSharedArchive(16);
  49             dumpAndLoadSharedArchive(32);
  50             dumpAndLoadSharedArchive(64);
  51         }
  52     }
  53 
  54     private static void
  55     dumpAndLoadSharedArchive(int objectAlignmentInBytes) throws Exception {
  56         String objectAlignmentArg = "-XX:ObjectAlignmentInBytes="
  57             + objectAlignmentInBytes;
  58         System.out.println("dumpAndLoadSharedArchive(): objectAlignmentInBytes = "
  59             + objectAlignmentInBytes);
  60 
  61         CDSTestUtils.createArchiveAndCheck(objectAlignmentArg);
  62         CDSTestUtils.runWithArchiveAndCheck(objectAlignmentArg);
  63     }
  64 }