hotspot/test/runtime/modules/AccessCheck/UmodUpkgDiffCL_ExpQualOther.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
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 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
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/*
 * @test
 * @summary class c5 defined in an unnamed module tries to access p6.c6 defined in m2.
 *          Access is denied, since an unnamed module can read all modules but p6 in module
 *          m2 is exported specifically to module m1, not to all modules.
 * @modules java.base/jdk.internal.misc
 * @library /test/lib
 * @compile myloaders/MyDiffClassLoader.java
 * @compile p6/c6.java
 * @compile c5.java
 * @run main/othervm -Xbootclasspath/a:. UmodUpkgDiffCL_ExpQualOther
 */

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

import java.lang.reflect.Layer;
import java.lang.module.Configuration;
import java.lang.module.ModuleDescriptor;
import java.lang.module.ModuleFinder;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import myloaders.MyDiffClassLoader;

//
// ClassLoader1 --> defines m1 --> no packages
// ClassLoader2 --> defines m2 --> packages p6
//
// m1 can read m2
// package p6 in m2 is not exported
//
// class c5 defined in an unnamed module tries to access p6.c6 defined in m2
// Access denied, an unnamed module can read all modules but p6 in module
//             m2 is exported specifically to module m1 not to all modules.
//
public class UmodUpkgDiffCL_ExpQualOther {

    // Create a Layer over the boot layer.
    // Define modules within this layer to test access between
    // publically defined classes within packages of those modules.
    public void createLayerOnBoot() throws Throwable {

        // Define module:     m1
        // Can read:          java.base, m2
        // Packages:          none
        // Packages exported: none
        ModuleDescriptor descriptor_m1 =
                ModuleDescriptor.module("m1")
                        .requires("java.base")
                        .requires("m2")
                        .build();

        // Define module:     m2
        // Can read:          java.base
        // Packages:          p6
        // Packages exported: p6 exported to m1
        ModuleDescriptor descriptor_m2 =
                ModuleDescriptor.module("m2")
                        .requires("java.base")
                        .exports("p6", Set.of("m1"))
                        .build();

        // Set up a ModuleFinder containing all modules for this layer.
        ModuleFinder finder = ModuleLibrary.of(descriptor_m1, descriptor_m2);

        // Resolves "m1"
        Configuration cf = Layer.boot()
                .configuration()
                .resolveRequires(finder, ModuleFinder.of(), Set.of("m1"));

        // map each module to differing class loaders for this test
        Map<String, ClassLoader> map = new HashMap<>();
        map.put("m1", MyDiffClassLoader.loader1);
        map.put("m2", MyDiffClassLoader.loader2);

        // Create Layer that contains m1 & m2
        Layer layer = Layer.boot().defineModules(cf, map::get);

        assertTrue(layer.findLoader("m1") == MyDiffClassLoader.loader1);
        assertTrue(layer.findLoader("m2") == MyDiffClassLoader.loader2);
        assertTrue(layer.findLoader("java.base") == null);

        // now use the same loader to load class c5
        Class c5_class = MyDiffClassLoader.loader1.loadClass("c5");
        try {
            c5_class.newInstance();
            throw new RuntimeException("Failed to get IAE (p6 in m2 is exported to m1, not unqualifiedly");
        } catch (IllegalAccessError e) {
            System.out.println(e.getMessage());
            if (!e.getMessage().contains("does not export")) {
                throw new RuntimeException("Wrong message: " + e.getMessage());
            }
        }
    }

    public static void main(String args[]) throws Throwable {
      UmodUpkgDiffCL_ExpQualOther test = new UmodUpkgDiffCL_ExpQualOther();
      test.createLayerOnBoot();
    }
}