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
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  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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  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
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  22  */
  23 
  24 /**
  25  * @test CdsSameObjectAlignment
  26  * @requires vm.cds
  27  * @summary Testing CDS (class data sharing) using varying object alignment.
  28  *          Using same object alignment for each dump/load pair
  29  * @requires (vm.opt.UseCompressedOops == null) | (vm.opt.UseCompressedOops == true)
  30  * @library /test/lib
  31  * @modules java.base/jdk.internal.misc
  32  *          java.management
  33  */
  34 
  35 import jdk.test.lib.Platform;
  36 import jdk.test.lib.cds.CDSTestUtils;
  37 import jdk.test.lib.process.OutputAnalyzer;
  38 
  39 public class CdsSameObjectAlignment {
  40     public static void main(String[] args) throws Exception {
  41         String nativeWordSize = System.getProperty("sun.arch.data.model");
  42         if (!Platform.is64bit()) {
  43             System.out.println("ObjectAlignmentInBytes for CDS is only " +
  44                 "supported on 64bit platforms; this plaform is " +
  45                 nativeWordSize);
  46             System.out.println("Skipping the test");
  47         } else {
  48             dumpAndLoadSharedArchive(8);
  49             dumpAndLoadSharedArchive(16);
  50             dumpAndLoadSharedArchive(32);
  51             dumpAndLoadSharedArchive(64);
  52         }
  53     }
  54 
  55     private static void
  56     dumpAndLoadSharedArchive(int objectAlignmentInBytes) throws Exception {
  57         String objectAlignmentArg = "-XX:ObjectAlignmentInBytes="
  58             + objectAlignmentInBytes;
  59         System.out.println("dumpAndLoadSharedArchive(): objectAlignmentInBytes = "
  60             + objectAlignmentInBytes);
  61 
  62         CDSTestUtils.createArchiveAndCheck(objectAlignmentArg);
  63         CDSTestUtils.runWithArchiveAndCheck(objectAlignmentArg);
  64     }
  65 }