1 /*

     2  * Copyright (c) 2015, 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 that the string referenced by an attribute is retrieved.

    26  * @test ImageGetStringBytesTest

    27  * @summary Unit test for JVM_ImageGetStringBytes() method

    28  * @library /testlibrary /../../test/lib

    29  * @build LocationConstants ImageGetStringBytesTest

    30  * @run main ClassFileInstaller sun.hotspot.WhiteBox

    31  *                              sun.hotspot.WhiteBox$WhiteBoxPermission

    32  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI ImageGetStringBytesTest

    33  */

    34 

    35 import java.io.File;

    36 import java.nio.ByteOrder;

    37 import sun.hotspot.WhiteBox;

    38 import static jdk.test.lib.Asserts.*;

    39 

    40 public class ImageGetStringBytesTest implements LocationConstants {

    41 

    42     public static final WhiteBox wb = WhiteBox.getWhiteBox();

    43 

    44     public static void main(String... args) throws Exception {

    45         String javaHome = System.getProperty("java.home");

    46         String imageFile = javaHome + File.separator + "lib" + File.separator

    47                 + "modules" + File.separator + "bootmodules.jimage";

    48 

    49         if (!(new File(imageFile)).exists()) {

    50             System.out.printf("Test skipped.");

    51             return;

    52         }

    53 

    54         boolean bigEndian = ByteOrder.nativeOrder() == ByteOrder.BIG_ENDIAN;

    55         long id = wb.imageOpenImage(imageFile, bigEndian);

    56 

    57         String className = "/java.base/java/lang/String.class";

    58         long[] offsetArr = wb.imageFindAttributes(id, className.getBytes());

    59 

    60         // Module

    61         assertTrue(checkAttribute(id, offsetArr, LOCATION_ATTRIBUTE_MODULE, "Module"));

    62 

    63         // Parent

    64         assertTrue(checkAttribute(id, offsetArr, LOCATION_ATTRIBUTE_PARENT, "Parent"));

    65 

    66         // Base

    67         assertTrue(checkAttribute(id, offsetArr, LOCATION_ATTRIBUTE_BASE, "Base"));

    68 

    69         // Extension

    70         assertTrue(checkAttribute(id, offsetArr, LOCATION_ATTRIBUTE_EXTENSION, "Extension"));

    71 

    72         wb.imageCloseImage(id);

    73     }

    74 

    75     private static boolean checkAttribute(long id, long[] offsetArr, int attrId, String attrName) {

    76         long offset = offsetArr[attrId];

    77         return wb.imageGetStringBytes(id, (int) offset) != null;

    78     }

    79 }