1 /*
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   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
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  24  */
  25 
  26 /*
  27  * @test
  28  * @summary Test that if module m1 can not read module m2, then class p1.c1
  29  *          in module m1 can not access p2.c2 in module m2.
  30  * @modules java.base/jdk.internal.misc
  31  * @library /testlibrary /test/lib
  32  * @compile myloaders/MySameClassLoader.java
  33  * @compile p2/c2.java
  34  * @compile p1/c1.java
  35  * @build CheckRead
  36  * @run main/othervm -Xbootclasspath/a:. CheckRead
  37  */
  38 
  39 import static jdk.test.lib.Asserts.*;
  40 
  41 import java.lang.reflect.Layer;
  42 import java.lang.module.Configuration;
  43 import java.lang.module.ModuleDescriptor;
  44 import java.lang.module.ModuleFinder;
  45 import java.util.HashMap;
  46 import java.util.Map;
  47 import java.util.Set;
  48 import myloaders.MySameClassLoader;
  49 
  50 //
  51 // ClassLoader1 --> defines m1 --> packages p1
  52 //                  defines m2 --> packages p2
  53 //                  defines m3 --> packages p3
  54 //
  55 // m1 can not read m2
  56 // package p2 in m2 is exported to m1
  57 //
  58 // class p1.c1 defined in m1 tries to access p2.c2 defined in m2.
  59 // Access denied since m1 can not read m2.
  60 //
  61 public class CheckRead {
  62 
  63     // Create a Layer over the boot layer.
  64     // Define modules within this layer to test access between
  65     // publicly defined classes within packages of those modules.
  66     public void createLayerOnBoot() throws Throwable {
  67 
  68         // Define module:     m1
  69         // Can read:          java.base, m3
  70         // Packages:          p1
  71         // Packages exported: p1 is exported unqualifiedly
  72         ModuleDescriptor descriptor_m1 =
  73                 new ModuleDescriptor.Builder("m1")
  74                         .requires("java.base")
  75                         .requires("m3")
  76                         .exports("p1")
  77                         .build();
  78 
  79         // Define module:     m2
  80         // Can read:          java.base
  81         // Packages:          p2
  82         // Packages exported: p2 is exported to m1
  83         ModuleDescriptor descriptor_m2 =
  84                 new ModuleDescriptor.Builder("m2")
  85                         .requires("java.base")
  86                         .exports("p2", "m1")
  87                         .build();
  88 
  89         // Define module:     m3
  90         // Can read:          java.base, m2
  91         // Packages:          p3
  92         // Packages exported: none
  93         ModuleDescriptor descriptor_m3 =
  94                 new ModuleDescriptor.Builder("m3")
  95                         .requires("java.base")
  96                         .requires("m2")
  97                         .conceals("p3")
  98                         .build();
  99 
 100         // Set up a ModuleFinder containing all modules for this layer.
 101         ModuleFinder finder = ModuleLibrary.of(descriptor_m1, descriptor_m2, descriptor_m3);
 102 
 103         // Resolves "m1"
 104         Configuration cf = Layer.boot()
 105                 .configuration()
 106                 .resolveRequires(finder, ModuleFinder.of(), Set.of("m1"));
 107 
 108         // map each module to differing class loaders for this test
 109         Map<String, ClassLoader> map = new HashMap<>();
 110         map.put("m1", MySameClassLoader.loader1);
 111         map.put("m2", MySameClassLoader.loader1);
 112         map.put("m3", MySameClassLoader.loader1);
 113 
 114         // Create Layer that contains m1, m2 and m3
 115         Layer layer = Layer.boot().defineModules(cf, map::get);
 116 
 117         assertTrue(layer.findLoader("m1") == MySameClassLoader.loader1);
 118         assertTrue(layer.findLoader("m2") == MySameClassLoader.loader1);
 119         assertTrue(layer.findLoader("m3") == MySameClassLoader.loader1);
 120         assertTrue(layer.findLoader("java.base") == null);
 121 
 122         // now use the same loader to load class p1.c1
 123         Class p1_c1_class = MySameClassLoader.loader1.loadClass("p1.c1");
 124         try {
 125             p1_c1_class.newInstance();
 126             throw new RuntimeException("Failed to get IAE (p2 in m2 is exported to m1 but m2 is not readable from m1)");
 127         } catch (IllegalAccessError e) {
 128             System.out.println(e.getMessage());
 129             if (!e.getMessage().contains("cannot access")) {
 130                 throw new RuntimeException("Wrong message: " + e.getMessage());
 131             }
 132         }
 133     }
 134 
 135     public static void main(String args[]) throws Throwable {
 136       CheckRead test = new CheckRead();
 137       test.createLayerOnBoot();
 138     }
 139 }