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 closing image opened multiple time. Test closing mutiple time an image.

    26  * @test ImageCloseTest

    27  * @summary Unit test for JVM_ImageClose() method

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

    29  * @build ImageCloseTest

    30  * @run main ClassFileInstaller sun.hotspot.WhiteBox

    31  *                              sun.hotspot.WhiteBox$WhiteBoxPermission

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

    33  */

    34 

    35 import java.io.File;

    36 import java.nio.ByteOrder;

    37 import sun.hotspot.WhiteBox;

    38 

    39 public class ImageCloseTest {

    40 

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

    42 

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

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

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

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

    47 

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

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

    50             return;

    51         }

    52 

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

    54         long id = 0;

    55 

    56         // too many opens

    57         for (int i = 0; i < 100; i++) {

    58             id = wb.imageOpenImage(imageFile, bigEndian);

    59         }

    60         wb.imageCloseImage(id);

    61 

    62         // too many closes

    63         id = wb.imageOpenImage(imageFile, bigEndian);

    64         for (int i = 0; i < 100; i++) {

    65             wb.imageCloseImage(id);

    66         }

    67     }

    68 }