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  * Find the attributes of existing and invalid classes.

    26  * @test ImageFindAttributesTest

    27  * @summary Unit test for JVM_ImageFindAttributes() method

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

    29  * @build ImageFindAttributesTest

    30  * @run main ClassFileInstaller sun.hotspot.WhiteBox

    31  *                              sun.hotspot.WhiteBox$WhiteBoxPermission

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

    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 ImageFindAttributesTest {

    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         // class resource

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

    59         long[] longArr = wb.imageFindAttributes(id, className.getBytes());

    60 

    61         assertNotNull(longArr, "Could not retrieve attributes of class " + className);

    62 

    63         // non-existent resource

    64         String neClassName = "/java.base/java/lang/NonExistentClass.class";

    65         longArr = wb.imageFindAttributes(id, neClassName.getBytes());

    66 

    67         assertNull(longArr, "Failed. Returned not null for non-existent " + neClassName);

    68 

    69         // garbage byte array

    70         byte[] buf = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9};

    71         longArr = wb.imageFindAttributes(id, buf);

    72 

    73         assertNull(longArr, "Found attributes for garbage class");

    74     }

    75 }