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  * @build com.oracle.java.testlibrary.*
  33  * @run main/othervm CdsDifferentObjectAlignment
  34  * @bug 8025642
  35  */
  36 
  37 import com.oracle.java.testlibrary.*;
  38 
  39 public class CdsDifferentObjectAlignment {
  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             createAndLoadSharedArchive(16, 64);
  49             createAndLoadSharedArchive(64, 32);
  50         }
  51     }
  52 
  53 
  54     // Parameters are object alignment expressed in bytes
  55     private static void
  56     createAndLoadSharedArchive(int createAlignment, int loadAlignment)
  57     throws Exception {
  58         String createAlignmentArgument = "-XX:ObjectAlignmentInBytes=" +
  59             createAlignment;
  60         String loadAlignmentArgument = "-XX:ObjectAlignmentInBytes=" +
  61             loadAlignment;
  62 
  63         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
  64             "-XX:+UnlockDiagnosticVMOptions",
  65             "-XX:SharedArchiveFile=./sample.jsa",
  66             "-Xshare:dump",
  67             createAlignmentArgument);
  68 
  69         OutputAnalyzer output = new OutputAnalyzer(pb.start());
  70         output.shouldContain("Loading classes to share");
  71         output.shouldHaveExitValue(0);
  72 
  73         pb = ProcessTools.createJavaProcessBuilder(
  74             "-XX:+UnlockDiagnosticVMOptions",
  75             "-XX:SharedArchiveFile=./sample.jsa",
  76             "-Xshare:on",
  77             loadAlignmentArgument,
  78             "-version");
  79 
  80         output = new OutputAnalyzer(pb.start());
  81         String expectedErrorMsg =
  82             String.format(
  83             "The shared archive file's ObjectAlignmentInBytes of %d " +
  84             "does not equal the current ObjectAlignmentInBytes of %d",
  85             createAlignment,
  86             loadAlignment);
  87 
  88         try {
  89             output.shouldContain(expectedErrorMsg);
  90         } catch (RuntimeException e) {
  91             output.shouldContain("Unable to use shared archive");
  92         }
  93         output.shouldHaveExitValue(1);
  94     }
  95 }