jdk8-mips64-public/hotspot: test/runtime/SharedArchiveFile/CdsSameObjectAlignment.java@740e263c80c6

8003424: Enable Class Data Sharing for CompressedOops
8016729: ObjectAlignmentInBytes=16 now forces the use of heap based compressed oops
8005933: The -Xshare:auto option is ignored for -server
Summary: Move klass metaspace above the heap and support CDS with compressed klass ptrs.
Reviewed-by: coleenp, kvn, mgerdin, tschatzl, stefank

     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  */

    24 /*

    25  * @test CdsSameObjectAlignment

    26  * @summary Testing CDS (class data sharing) using varying object alignment.

    27  *          Using same object alignment for each dump/load pair

    28  * @library /testlibrary

    29  */

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

    33 public class CdsSameObjectAlignment {

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

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

    36         if (!Platform.is64bit()) {

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

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

    39                 nativeWordSize);

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

    41         } else {

    42             dumpAndLoadSharedArchive(8);

    43             dumpAndLoadSharedArchive(16);

    44             dumpAndLoadSharedArchive(32);

    45             dumpAndLoadSharedArchive(64);

    46         }

    47     }

    49     private static void

    50     dumpAndLoadSharedArchive(int objectAlignmentInBytes) throws Exception {

    51         String objectAlignmentArg = "-XX:ObjectAlignmentInBytes="

    52             + objectAlignmentInBytes;

    53         System.out.println("dumpAndLoadSharedArchive(): objectAlignmentInBytes = "

    54             + objectAlignmentInBytes);

    56         // create shared archive

    57         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(

    58             "-XX:+UnlockDiagnosticVMOptions",

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

    60             "-Xshare:dump",

    61             objectAlignmentArg);

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

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

    65         output.shouldHaveExitValue(0);

    68         // run using the shared archive

    69         pb = ProcessTools.createJavaProcessBuilder(

    70             "-XX:+UnlockDiagnosticVMOptions",

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

    72             "-Xshare:on",

    73             objectAlignmentArg,

    74             "-version");

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

    78         try {

    79             output.shouldContain("sharing");

    80             output.shouldHaveExitValue(0);

    81         } catch (RuntimeException e) {

    82             // CDS uses absolute addresses for performance.

    83             // It will try to reserve memory at a specific address;

    84             // there is a chance such reservation will fail

    85             // If it does, it is NOT considered a failure of the feature,

    86             // rather a possible expected outcome, though not likely

    87             output.shouldContain("Could not allocate metaspace at a compatible address");

    88             output.shouldHaveExitValue(1);

    89         }

    90     }

    91 }

Mercurial > jdk8-mips64-public > hotspot / file revision

test/runtime/SharedArchiveFile/CdsSameObjectAlignment.java@740e263c80c6

test/runtime/SharedArchiveFile/CdsSameObjectAlignment.java