1 /*

     2  * Copyright (c) 2016, 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

    26  * @modules java.base/jdk.internal.misc

    27  * @library /test/lib ..

    28  * @build sun.hotspot.WhiteBox

    29  * @compile/module=java.base java/lang/reflect/ModuleHelper.java

    30  * @run main ClassFileInstaller sun.hotspot.WhiteBox

    31  *                              sun.hotspot.WhiteBox$WhiteBoxPermission

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

    33  */

    34 

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

    36 

    37 public class JVMCanReadModule {

    38 

    39     public static void main(String args[]) throws Throwable {

    40         MyClassLoader asking_cl = new MyClassLoader();

    41         MyClassLoader target_cl = new MyClassLoader();

    42         Object asking_module, target_module;

    43         boolean result;

    44 

    45         asking_module = ModuleHelper.ModuleObject("asking_module", asking_cl, new String[] { "mypackage" });

    46         assertNotNull(asking_module, "Module should not be null");

    47         ModuleHelper.DefineModule(asking_module, "9.0", "asking_module/here", new String[] { "mypackage" });

    48         target_module = ModuleHelper.ModuleObject("target_module", target_cl, new String[] { "yourpackage" });

    49         assertNotNull(target_module, "Module should not be null");

    50         ModuleHelper.DefineModule(target_module, "9.0", "target_module/here", new String[] { "yourpackage" });

    51 

    52         // Set up relationship

    53         ModuleHelper.AddReadsModule(asking_module, target_module);

    54 

    55         // Null asking_module argument, expect an NPE

    56         try {

    57             result = ModuleHelper.CanReadModule(null, target_module);

    58             throw new RuntimeException("Failed to get the expected NPE");

    59         } catch(NullPointerException e) {

    60             // Expected

    61         }

    62 

    63         // Bad asking_module argument, expect an IAE

    64         try {

    65             result = ModuleHelper.CanReadModule(asking_cl, target_module);

    66             throw new RuntimeException("Failed to get the expected IAE");

    67         } catch(IllegalArgumentException e) {

    68             // Expected

    69         }

    70 

    71         // Bad target_module argument, expect an IAE

    72         try {

    73             result = ModuleHelper.CanReadModule(asking_module, asking_cl);

    74             throw new RuntimeException("Failed to get the expected IAE");

    75         } catch(IllegalArgumentException e) {

    76             // Expected

    77         }

    78 

    79         // Verify strict modules can not read the unnamed module

    80         result = ModuleHelper.CanReadModule(target_module, null);

    81         assertFalse(result, "target_module can not read unnamed module");

    82 

    83         // Verify asking_module can read itself

    84         result = ModuleHelper.CanReadModule(asking_module, asking_module);

    85         assertTrue(result, "asking_module can read itself");

    86 

    87         // Verify asking_module can read target_module

    88         result = ModuleHelper.CanReadModule(asking_module, target_module);

    89         assertTrue(result, "asking_module can read target_module");

    90 

    91         // Verify target_module cannot read asking_module

    92         result = ModuleHelper.CanReadModule(target_module, asking_module);

    93         assertTrue(!result, "target_module cannot read asking_module");

    94     }

    95 

    96     static class MyClassLoader extends ClassLoader { }

    97 }