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25
26/*
27 * @test
28 * @summary class p1.c1 defined in m1x tries to access p2.c2 defined in unnamed module.
29 * @library /test/lib
30 * @modules java.base/jdk.internal.misc
31 * @modules java.base/jdk.internal.module
32 * @compile myloaders/MyDiffClassLoader.java
33 * @compile p2/c2.java
34 * @compile p1/c1.java
35 * @compile p1/c1ReadEdgeDiffLoader.java
36 * @compile p1/c1Loose.java
37 * @run main/othervm -Xbootclasspath/a:. DiffCL_Umod
38 */
39
40import static jdk.test.lib.Asserts.*;
41
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.MyDiffClassLoader;
49
50//
51// ClassLoader1 --> defines m1x --> packages p1
52//                  package p1 in m1x is exported unqualifiedly
53//
54// class p1.c1 defined in m1x tries to access p2.c2 defined in
55// in unnamed module.
56//
57// Three access attempts occur in this test:
58//   1. The first access is not allowed because a strict module
59//      cannot read an unnamed module.
60//   2. In this scenario a strict module establishes readability
61//      to the particular unnamed module it is trying to access.
62//      Access is allowed.
63//   3. Module m1x in the test_looseModuleLayer() method
64//      is transitioned to a loose module, access
65//      to all unnamed modules is allowed.
66//
67public class DiffCL_Umod {
68
69 // Create layers over the boot layer to test different
70 // accessing scenarios of a named module to an unnamed module.
71
72 // Module m1x is a strict module and has not established
73 // readability to an unnamed module that p2.c2 is defined in.
74 public void test_strictModuleLayer() throws Throwable {
75
76     // Define module:     m1x
77     // Can read:          java.base
78     // Packages:          p1
79     // Packages exported: p1 is exported unqualifiedly
80     ModuleDescriptor descriptor_m1x =
81             ModuleDescriptor.newModule("m1x")
82                     .requires("java.base")
83                     .exports("p1")
84                     .build();
85
86     // Set up a ModuleFinder containing all modules for this layer.
87     ModuleFinder finder = ModuleLibrary.of(descriptor_m1x);
88
89     // Resolves "m1x"
90     Configuration cf = ModuleLayer.boot()
91             .configuration()
92             .resolve(finder, ModuleFinder.of(), Set.of("m1x"));
93
94     MyDiffClassLoader.loader1 = new MyDiffClassLoader();
95     MyDiffClassLoader.loader2 = new MyDiffClassLoader();
96
97     // map module m1x to class loader.
98     // class c2 will be loaded in an unnamed module/loader2
99     // to achieve differing class loaders.
100     Map<String, ClassLoader> map = new HashMap<>();
101     map.put("m1x", MyDiffClassLoader.loader1);
102
103     // Create layer that contains m1x
104     ModuleLayer layer = ModuleLayer.boot().defineModules(cf, map::get);
105
106     assertTrue(layer.findLoader("m1x") == MyDiffClassLoader.loader1);
107     assertTrue(layer.findLoader("java.base") == null);
108
109     // now use the same loader to load class p1.c1
110     Class p1_c1_class = MyDiffClassLoader.loader1.loadClass("p1.c1");
111
112     // Attempt access
113     try {
114         p1_c1_class.newInstance();
115         throw new RuntimeException("Test Failed, strict module m1x should not be able " +
116                                    "to access public type p2.c2 defined in unnamed module");
117     } catch (IllegalAccessError e) {
118     }
119}
120
121 // Module m1x is a strict module and has established
122 // readability to an unnamed module that p2.c2 is defined in.
123 public void test_strictModuleUnnamedReadableLayer() throws Throwable {
124
125     // Define module:     m1x
126     // Can read:          java.base
127     // Packages:          p1
128     // Packages exported: p1 is exported unqualifiedly
129     ModuleDescriptor descriptor_m1x =
130             ModuleDescriptor.newModule("m1x")
131                     .requires("java.base")
132                     .exports("p1")
133                     .build();
134
135     // Set up a ModuleFinder containing all modules for this layer.
136     ModuleFinder finder = ModuleLibrary.of(descriptor_m1x);
137
138     // Resolves "m1x"
139     Configuration cf = ModuleLayer.boot()
140             .configuration()
141             .resolve(finder, ModuleFinder.of(), Set.of("m1x"));
142
143     MyDiffClassLoader.loader1 = new MyDiffClassLoader();
144     MyDiffClassLoader.loader2 = new MyDiffClassLoader();
145
146     // map module m1x to class loader.
147     // class c2 will be loaded in an unnamed module/loader2
148     // to achieve differing class loaders.
149     Map<String, ClassLoader> map = new HashMap<>();
150     map.put("m1x", MyDiffClassLoader.loader1);
151
152     // Create layer that contains m1x
153     ModuleLayer layer = ModuleLayer.boot().defineModules(cf, map::get);
154
155     assertTrue(layer.findLoader("m1x") == MyDiffClassLoader.loader1);
156     assertTrue(layer.findLoader("java.base") == null);
157
158     // now use the same loader to load class p1.c1ReadEdgeDiffLoader
159     Class p1_c1_class = MyDiffClassLoader.loader1.loadClass("p1.c1ReadEdgeDiffLoader");
160
161     try {
162        // Read edge between m1x and the unnamed module that loads p2.c2 is established in
163        // c1ReadEdgeDiffLoader's ctor before attempting access.
164        p1_c1_class.newInstance();
165     } catch (IllegalAccessError e) {
166         throw new RuntimeException("Test Failed, module m1x has established readability to p2/c2 loader's " +
167                                    "unnamed module, access should be allowed: " + e.getMessage());
168     }
169 }
170
171 // Module m1x is a loose module and thus can read all unnamed modules.
172 public void test_looseModuleLayer() throws Throwable {
173
174     // Define module:     m1x
175     // Can read:          java.base
176     // Packages:          p1
177     // Packages exported: p1 is exported unqualifiedly
178     ModuleDescriptor descriptor_m1x =
179             ModuleDescriptor.newModule("m1x")
180                     .requires("java.base")
181                     .exports("p1")
182                     .build();
183
184     // Set up a ModuleFinder containing all modules for this layer.
185     ModuleFinder finder = ModuleLibrary.of(descriptor_m1x);
186
187     // Resolves "m1x"
188     Configuration cf = ModuleLayer.boot()
189             .configuration()
190             .resolve(finder, ModuleFinder.of(), Set.of("m1x"));
191
192     MyDiffClassLoader.loader1 = new MyDiffClassLoader();
193     MyDiffClassLoader.loader2 = new MyDiffClassLoader();
194
195     // map module m1x to class loader.
196     // class c2 will be loaded in an unnamed module/loader2
197     // to achieve differing class loaders.
198     Map<String, ClassLoader> map = new HashMap<>();
199     map.put("m1x", MyDiffClassLoader.loader1);
200
201     // Create layer that contains m1x
202     ModuleLayer layer = ModuleLayer.boot().defineModules(cf, map::get);
203
204     assertTrue(layer.findLoader("m1x") == MyDiffClassLoader.loader1);
205     assertTrue(layer.findLoader("java.base") == null);
206
207     // now use the same loader to load class p1.c1Loose
208     Class p1_c1_class = MyDiffClassLoader.loader1.loadClass("p1.c1Loose");
209
210     // change m1x to read all unnamed modules
211     Module m1x = layer.findModule("m1x").get();
212     jdk.internal.module.Modules.addReadsAllUnnamed(m1x);
213
214     try {
215         p1_c1_class.newInstance();
216     } catch (IllegalAccessError e) {
217         throw new RuntimeException("Test Failed, loose module m1x should be able to access " +
218                                    "public type p2.c2 defined in unnamed module: " + e.getMessage());
219     }
220 }
221
222 public static void main(String args[]) throws Throwable {
223   DiffCL_Umod test = new DiffCL_Umod();
224   test.test_strictModuleLayer();                // access denied
225   test.test_strictModuleUnnamedReadableLayer(); // access allowed
226   test.test_looseModuleLayer();                 // access allowed
227 }
228}
229