1 /*

     2  * Copyright (c) 2013, 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  */

    33 

    34 import com.oracle.java.testlibrary.*;

    35 

    36 public class CdsDifferentObjectAlignment {

    37     public static void main(String[] args) throws Exception {

    38         String nativeWordSize = System.getProperty("sun.arch.data.model");

    39         if (!Platform.is64bit()) {

    40             System.out.println("ObjectAlignmentInBytes for CDS is only " +

    41                 "supported on 64bit platforms; this plaform is " +

    42                 nativeWordSize);

    43             System.out.println("Skipping the test");

    44         } else {

    45             createAndLoadSharedArchive(16, 64);

    46             createAndLoadSharedArchive(64, 32);

    47         }

    48     }

    49 

    50 

    51     // Parameters are object alignment expressed in bytes

    52     private static void

    53     createAndLoadSharedArchive(int createAlignment, int loadAlignment)

    54     throws Exception {

    55         String createAlignmentArgument = "-XX:ObjectAlignmentInBytes=" +

    56             createAlignment;

    57         String loadAlignmentArgument = "-XX:ObjectAlignmentInBytes=" +

    58             loadAlignment;

    59 

    60         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(

    61             "-XX:+UnlockDiagnosticVMOptions",

    62             "-XX:SharedArchiveFile=./sample.jsa",

    63             "-Xshare:dump",

    64             createAlignmentArgument);

    65 

    66         OutputAnalyzer output = new OutputAnalyzer(pb.start());

    67         output.shouldContain("Loading classes to share");

    68         output.shouldHaveExitValue(0);

    69 

    70         pb = ProcessTools.createJavaProcessBuilder(

    71             "-XX:+UnlockDiagnosticVMOptions",

    72             "-XX:SharedArchiveFile=./sample.jsa",

    73             "-Xshare:on",

    74             loadAlignmentArgument,

    75             "-version");

    76 

    77         output = new OutputAnalyzer(pb.start());

    78         String expectedErrorMsg =

    79             String.format(

    80             "The shared archive file's ObjectAlignmentInBytes of %d " +

    81             "does not equal the current ObjectAlignmentInBytes of %d",

    82             createAlignment,

    83             loadAlignment);

    84 

    85         output.shouldContain(expectedErrorMsg);

    86         output.shouldHaveExitValue(1);

    87     }

    88 }