1 /*
   2  * Copyright (c) 2013, 2014, 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 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  * @library /testlibrary
  32  * @bug 8025642
  33  */
  34 
  35 import com.oracle.java.testlibrary.*;
  36 
  37 public class CdsDifferentObjectAlignment {
  38     public static void main(String[] args) throws Exception {
  39         String nativeWordSize = System.getProperty("sun.arch.data.model");
  40         if (!Platform.is64bit()) {
  41             System.out.println("ObjectAlignmentInBytes for CDS is only " +
  42                 "supported on 64bit platforms; this plaform is " +
  43                 nativeWordSize);
  44             System.out.println("Skipping the test");
  45         } else {
  46             createAndLoadSharedArchive(16, 64);
  47             createAndLoadSharedArchive(64, 32);
  48         }
  49     }
  50 
  51 
  52     // Parameters are object alignment expressed in bytes
  53     private static void
  54     createAndLoadSharedArchive(int createAlignment, int loadAlignment)
  55     throws Exception {
  56         String createAlignmentArgument = "-XX:ObjectAlignmentInBytes=" +
  57             createAlignment;
  58         String loadAlignmentArgument = "-XX:ObjectAlignmentInBytes=" +
  59             loadAlignment;
  60 
  61         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
  62             "-XX:+UnlockDiagnosticVMOptions",
  63             "-XX:SharedArchiveFile=./sample.jsa",
  64             "-Xshare:dump",
  65             createAlignmentArgument);
  66 
  67         OutputAnalyzer output = new OutputAnalyzer(pb.start());
  68         output.shouldContain("Loading classes to share");
  69         output.shouldHaveExitValue(0);
  70 
  71         pb = ProcessTools.createJavaProcessBuilder(
  72             "-XX:+UnlockDiagnosticVMOptions",
  73             "-XX:SharedArchiveFile=./sample.jsa",
  74             "-Xshare:on",
  75             loadAlignmentArgument,
  76             "-version");
  77 
  78         output = new OutputAnalyzer(pb.start());
  79         String expectedErrorMsg =
  80             String.format(
  81             "The shared archive file's ObjectAlignmentInBytes of %d " +
  82             "does not equal the current ObjectAlignmentInBytes of %d",
  83             createAlignment,
  84             loadAlignment);
  85 
  86         try {
  87             output.shouldContain(expectedErrorMsg);
  88         } catch (RuntimeException e) {
  89             output.shouldContain("Unable to use shared archive");
  90         }
  91         output.shouldHaveExitValue(1);
  92     }
  93 }