1 /*
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   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.
  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 CdsDifferentObjectAlignment
  26  * @summary Testing CDS (class data sharing) using varying object alignment.
  27  *          Using different object alignment for each dump/load pair.
  28  *          This is a negative test; using  object alignment for loading that
  29  *          is different from object alignment for creating a CDS file
  30  *          should fail when loading.
  31  * @requires (vm.opt.UseCompressedOops == null) | (vm.opt.UseCompressedOops == true)
  32  * @library /test/lib
  33  * @bug 8025642
  34  * @modules java.base/jdk.internal.misc
  35  *          java.management
  36  */
  37 
  38 import jdk.test.lib.cds.CDSTestUtils;
  39 import jdk.test.lib.process.OutputAnalyzer;
  40 import jdk.test.lib.Platform;
  41 
  42 public class CdsDifferentObjectAlignment {
  43     public static void main(String[] args) throws Exception {
  44         String nativeWordSize = System.getProperty("sun.arch.data.model");
  45         if (!Platform.is64bit()) {
  46             System.out.println("ObjectAlignmentInBytes for CDS is only " +
  47                 "supported on 64bit platforms; this plaform is " +
  48                 nativeWordSize);
  49             System.out.println("Skipping the test");
  50         } else {
  51             createAndLoadSharedArchive(16, 64);
  52             createAndLoadSharedArchive(64, 32);
  53         }
  54     }
  55 
  56 
  57     // Parameters are object alignment expressed in bytes
  58     private static void
  59     createAndLoadSharedArchive(int createAlignment, int loadAlignment)
  60     throws Exception {
  61         String createAlignmentArgument = "-XX:ObjectAlignmentInBytes=" +
  62             createAlignment;
  63         String loadAlignmentArgument = "-XX:ObjectAlignmentInBytes=" +
  64             loadAlignment;
  65         String expectedErrorMsg =
  66             String.format(
  67             "The shared archive file's ObjectAlignmentInBytes of %d " +
  68             "does not equal the current ObjectAlignmentInBytes of %d",
  69             createAlignment,
  70             loadAlignment);
  71 
  72         CDSTestUtils.createArchiveAndCheck(createAlignmentArgument);
  73 
  74         OutputAnalyzer out = CDSTestUtils.runWithArchive(loadAlignmentArgument);
  75         CDSTestUtils.checkExecExpectError(out, 1, expectedErrorMsg);
  76     }
  77 }