CheckRead.java revision 12723:afedee84773e 
1/*
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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5 * This code is free software; you can redistribute it and/or modify it
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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).
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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
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25
26/*
27 * @test
28 * @summary Test that if module m1x can not read module m2x, then class p1.c1
29 *          in module m1x can not access p2.c2 in module m2x.
30 * @modules java.base/jdk.internal.misc
31 * @library /test/lib
32 * @compile myloaders/MySameClassLoader.java
33 * @compile p2/c2.java
34 * @compile p1/c1.java
35 * @run main/othervm -Xbootclasspath/a:. CheckRead
36 */
37
38import static jdk.test.lib.Asserts.*;
39
40import java.lang.module.Configuration;
41import java.lang.module.ModuleDescriptor;
42import java.lang.module.ModuleFinder;
43import java.util.HashMap;
44import java.util.Map;
45import java.util.Set;
46import myloaders.MySameClassLoader;
47
48//
49// ClassLoader1 --> defines m1x --> packages p1
50//                  defines m2x --> packages p2
51//                  defines m3x --> packages p3
52//
53// m1x can not read m2x
54// package p2 in m2x is exported to m1x
55//
56// class p1.c1 defined in m1x tries to access p2.c2 defined in m2x.
57// Access denied since m1x can not read m2x.
58//
59public class CheckRead {
60
61    // Create a layer over the boot layer.
62    // Define modules within this layer to test access between
63    // publicly defined classes within packages of those modules.
64    public void createLayerOnBoot() throws Throwable {
65
66        // Define module:     m1x
67        // Can read:          java.base, m3x
68        // Packages:          p1
69        // Packages exported: p1 is exported unqualifiedly
70        ModuleDescriptor descriptor_m1x =
71                ModuleDescriptor.newModule("m1x")
72                        .requires("java.base")
73                        .requires("m3x")
74                        .exports("p1")
75                        .build();
76
77        // Define module:     m2x
78        // Can read:          java.base
79        // Packages:          p2
80        // Packages exported: p2 is exported to m1x
81        ModuleDescriptor descriptor_m2x =
82                ModuleDescriptor.newModule("m2x")
83                        .requires("java.base")
84                        .exports("p2", Set.of("m1x"))
85                        .build();
86
87        // Define module:     m3x
88        // Can read:          java.base, m2x
89        // Packages:          p3
90        // Packages exported: none
91        ModuleDescriptor descriptor_m3x =
92                ModuleDescriptor.newModule("m3x")
93                        .requires("java.base")
94                        .requires("m2x")
95                        .packages(Set.of("p3"))
96                        .build();
97
98        // Set up a ModuleFinder containing all modules for this layer.
99        ModuleFinder finder = ModuleLibrary.of(descriptor_m1x, descriptor_m2x, descriptor_m3x);
100
101        // Resolves "m1x"
102        Configuration cf = ModuleLayer.boot()
103                .configuration()
104                .resolve(finder, ModuleFinder.of(), Set.of("m1x"));
105
106        // map each module to differing class loaders for this test
107        Map<String, ClassLoader> map = new HashMap<>();
108        map.put("m1x", MySameClassLoader.loader1);
109        map.put("m2x", MySameClassLoader.loader1);
110        map.put("m3x", MySameClassLoader.loader1);
111
112        // Create layer that contains m1x, m2x and m3x
113        ModuleLayer layer = ModuleLayer.boot().defineModules(cf, map::get);
114
115        assertTrue(layer.findLoader("m1x") == MySameClassLoader.loader1);
116        assertTrue(layer.findLoader("m2x") == MySameClassLoader.loader1);
117        assertTrue(layer.findLoader("m3x") == MySameClassLoader.loader1);
118        assertTrue(layer.findLoader("java.base") == null);
119
120        // now use the same loader to load class p1.c1
121        Class p1_c1_class = MySameClassLoader.loader1.loadClass("p1.c1");
122        try {
123            p1_c1_class.newInstance();
124            throw new RuntimeException("Failed to get IAE (p2 in m2x is exported to m1x but m2x is not readable from m1x)");
125        } catch (IllegalAccessError e) {
126            System.out.println(e.getMessage());
127            if (!e.getMessage().contains("cannot access")) {
128                throw new RuntimeException("Wrong message: " + e.getMessage());
129            }
130        }
131    }
132
133    public static void main(String args[]) throws Throwable {
134      CheckRead test = new CheckRead();
135      test.createLayerOnBoot();
136    }
137}
138