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 /testlibrary /test/lib /compiler/whitebox ..
  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 }