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

/*
 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * 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).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

/*
 * @test
 * @summary Test that if module m1 can read module m2, but package p2 in m2
 *          is exported specifically to module m3, then class p1.c1 in m1 can not
 *          access p2.c2 in m2.
 * @modules java.base/jdk.internal.misc
 * @library /test/lib
 * @compile myloaders/MySameClassLoader.java
 * @compile p2/c2.java
 * @compile p1/c1.java
 * @run main/othervm -Xbootclasspath/a:. 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.MySameClassLoader;

//
// ClassLoader1 --> defines m1 --> packages p1
//                  defines m2 --> packages p2
//                  defines m3 --> packages p3
//
// m1 can read m2
// package p2 in m2 is exported to m3
//
// class p1.c1 defined in m1 tries to access p2.c2 defined in m2
// Access denied since although m1 can read m2, p2 is exported only to m3.
//
public class 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, m3
        // Packages:          p1
        // Packages exported: p1 is exported unqualifiedly
        ModuleDescriptor descriptor_m1 =
                ModuleDescriptor.module("m1")
                        .requires("java.base")
                        .requires("m2")
                        .requires("m3")
                        .exports("p1")
                        .build();

        // Define module:     m2
        // Can read:          java.base
        // Packages:          p2
        // Packages exported: p2 is exported to m3
        ModuleDescriptor descriptor_m2 =
                ModuleDescriptor.module("m2")
                        .requires("java.base")
                        .exports("p2", Set.of("m3"))
                        .build();

        // Define module:     m3
        // Can read:          java.base, m2
        // Packages:          p3
        // Packages exported: none
        ModuleDescriptor descriptor_m3 =
                ModuleDescriptor.module("m3")
                        .requires("java.base")
                        .requires("m2")
                        .contains("p3")
                        .build();

        // Set up a ModuleFinder containing all modules for this layer.
        ModuleFinder finder = ModuleLibrary.of(descriptor_m1, descriptor_m2, descriptor_m3);

        // 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", MySameClassLoader.loader1);
        map.put("m2", MySameClassLoader.loader1);
        map.put("m3", MySameClassLoader.loader1);

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

        assertTrue(layer.findLoader("m1") == MySameClassLoader.loader1);
        assertTrue(layer.findLoader("m2") == MySameClassLoader.loader1);
        assertTrue(layer.findLoader("m3") == MySameClassLoader.loader1);
        assertTrue(layer.findLoader("java.base") == null);

        // now use the same loader to load class p1.c1
        Class p1_c1_class = MySameClassLoader.loader1.loadClass("p1.c1");
        try {
            p1_c1_class.newInstance();
            throw new RuntimeException("Failed to get IAE (p2 in m2 is exported to m3 not to m1)");
        } 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 {
      ExpQualOther test = new ExpQualOther();
      test.createLayerOnBoot();
    }
}