hotspot/test/runtime/modules/AccessCheck/DiffCL_ExpUnqual.java
author alanb
Fri, 10 Feb 2017 09:03:55 +0000
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8173393: Module system implementation refresh (2/2017) Reviewed-by: lfoltan, acorn, mchung Contributed-by: alan.bateman@oracle.com, george.triantafillou@oracle.com
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/*
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 * Copyright (c) 2016, 2017, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.  Oracle designates this
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 * particular file as subject to the "Classpath" exception as provided
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 * by Oracle in the LICENSE file that accompanied this code.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 */
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/*
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 * @test
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 * @summary Test that if module m1x can read module m2x, and package p2 in m2x is
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 *          exported unqualifiedly, then class p1.c1 in m1x can read p2.c2 in m2x.
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 * @modules java.base/jdk.internal.misc
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 * @library /test/lib
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 * @compile myloaders/MyDiffClassLoader.java
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 * @compile p2/c2.java
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 * @compile p1/c1.java
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 * @run main/othervm -Xbootclasspath/a:. DiffCL_ExpUnqual
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 */
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import static jdk.test.lib.Asserts.*;
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import java.lang.reflect.Layer;
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import java.lang.module.Configuration;
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import java.lang.module.ModuleDescriptor;
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import java.lang.module.ModuleFinder;
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import java.util.HashMap;
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import java.util.Map;
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import java.util.Set;
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import myloaders.MyDiffClassLoader;
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//
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// ClassLoader1 --> defines m1x --> packages p1
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// ClassLoader2 --> defines m2x --> packages p2
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//
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// m1x can read m2x
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// package p2 in m2x is exported to m1x
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//
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// class p1.c1 defined in m1x tries to access p2.c2 defined in m2x
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// Access allowed since m1x can read m2x and package p2 is exported
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// unqualifiedly.
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//
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public class DiffCL_ExpUnqual {
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    // Create a Layer over the boot layer.
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    // Define modules within this layer to test access between
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    // publically defined classes within packages of those modules.
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    public void createLayerOnBoot() throws Throwable {
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        // Define module:     m1x
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        // Can read:          java.base, m2x
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        // Packages:          p1
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        // Packages exported: p1 is exported unqualifiedly
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        ModuleDescriptor descriptor_m1x =
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                ModuleDescriptor.newModule("m1x")
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                        .requires("java.base")
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                        .requires("m2x")
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                        .exports("p1")
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                        .build();
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        // Define module:     m2x
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        // Can read:          java.base
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        // Packages:          p2
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        // Packages exported: package p2 is exported to m1x
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        ModuleDescriptor descriptor_m2x =
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                ModuleDescriptor.newModule("m2x")
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                        .requires("java.base")
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                        .exports("p2")
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                        .build();
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        // Set up a ModuleFinder containing all modules for this layer.
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        ModuleFinder finder = ModuleLibrary.of(descriptor_m1x, descriptor_m2x);
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        // Resolves "m1x"
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        Configuration cf = Layer.boot()
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                .configuration()
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                .resolve(finder, ModuleFinder.of(), Set.of("m1x"));
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        // map each module to differing class loaders for this test
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        Map<String, ClassLoader> map = new HashMap<>();
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        map.put("m1x", MyDiffClassLoader.loader1);
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        map.put("m2x", MyDiffClassLoader.loader2);
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        // Create Layer that contains m1x & m2x
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        Layer layer = Layer.boot().defineModules(cf, map::get);
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        assertTrue(layer.findLoader("m1x") == MyDiffClassLoader.loader1);
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        assertTrue(layer.findLoader("m2x") == MyDiffClassLoader.loader2);
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        assertTrue(layer.findLoader("java.base") == null);
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        // now use the same loader to load class p1.c1
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        Class p1_c1_class = MyDiffClassLoader.loader1.loadClass("p1.c1");
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        try {
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            p1_c1_class.newInstance();
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        } catch (IllegalAccessError e) {
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            throw new RuntimeException("Test Failed, an IAE should not be thrown since p2 is exported qualifiedly to m1x");
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        }
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    }
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    public static void main(String args[]) throws Throwable {
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      DiffCL_ExpUnqual test = new DiffCL_ExpUnqual();
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      test.createLayerOnBoot();
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    }
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}