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 accessing the data address of a jimage. This only makes sense when the
  26  * entire jimage is mapped into memory.
  27  * @test ImageGetDataAddressTest
  28  * @summary Unit test for JVM_ImageGetDataAddress() method
  29  * @library /testlibrary /../../test/lib
  30  * @build ImageGetDataAddressTest
  31  * @run main ClassFileInstaller sun.hotspot.WhiteBox
  32  *                              sun.hotspot.WhiteBox$WhiteBoxPermission
  33  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:+MemoryMapImage ImageGetDataAddressTest +
  34  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:-MemoryMapImage ImageGetDataAddressTest -
  35  */
  36 
  37 import java.io.File;
  38 import java.nio.ByteOrder;
  39 import sun.hotspot.WhiteBox;
  40 import static jdk.test.lib.Asserts.*;
  41 
  42 public class ImageGetDataAddressTest {
  43 
  44     public static final WhiteBox wb = WhiteBox.getWhiteBox();
  45 
  46     public static void main(String... args) throws Exception {
  47         String javaHome = System.getProperty("java.home");
  48         String imageFile = javaHome + File.separator + "lib" + File.separator
  49                 + "modules" + File.separator + "bootmodules.jimage";
  50 
  51         if (!(new File(imageFile)).exists()) {
  52             System.out.printf("Test skipped.");
  53             return;
  54         }
  55 
  56         boolean isMMap = args[0].equals("+");
  57 
  58         boolean bigEndian = ByteOrder.nativeOrder() == ByteOrder.BIG_ENDIAN;
  59         long id = wb.imageOpenImage(imageFile, bigEndian);
  60 
  61         // get data for valid id
  62         long dataAddr = wb.imageGetDataAddress(id);
  63         assertFalse((dataAddr == 0) && isMMap, "Failed. Data address is " + dataAddr + " for valid id\n");
  64 
  65         // get data for invalid id == 0
  66         dataAddr = wb.imageGetDataAddress(0);
  67         assertTrue(dataAddr == 0, "Failed. Data address is " + dataAddr + " for zero id\n");
  68 
  69         wb.imageCloseImage(id);
  70     }
  71 }