CheckRead.java revision 11098:927d84d0b391 
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.  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.
20 *
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
23 * questions.
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
39import static jdk.test.lib.Asserts.*;
40
41import java.lang.reflect.Layer;
42import java.lang.module.Configuration;
43import java.lang.module.ModuleDescriptor;
44import java.lang.module.ModuleFinder;
45import java.util.HashMap;
46import java.util.Map;
47import java.util.Set;
48import 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//
61public 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.empty(), 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}
140