1 /**
2 * Copyright (c) 2014, 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.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24 /*
25 * @test
26 * @summary Exercise Class#getModule
27 * @modules java.base/jdk.internal.org.objectweb.asm
28 * java.base/jdk.internal.misc
29 * java.desktop
30 * @run testng GetModuleTest
31 */
32
33 import java.awt.Component;
34 import java.lang.reflect.Field;
35 import java.lang.reflect.Module;
36
37 import jdk.internal.org.objectweb.asm.ClassWriter;
38 import static jdk.internal.org.objectweb.asm.Opcodes.*;
39 import jdk.internal.misc.Unsafe;
40
41 import org.testng.annotations.DataProvider;
42 import org.testng.annotations.Test;
43 import static org.testng.Assert.*;
44
45 public class GetModuleTest {
46
47 static final Unsafe U;
48 static {
49 try {
50 Field theUnsafe = Unsafe.class.getDeclaredField("theUnsafe");
51 theUnsafe.setAccessible(true);
52 U = (Unsafe) theUnsafe.get(null);
53 } catch (Exception e) {
54 throw new AssertionError(e);
55 }
56 }
57
58 private static final Module TEST_MODULE = GetModuleTest.class.getModule();
59
60
61 @DataProvider(name = "testclasses")
62 public Object[][] testClasses() {
63 return new Object[][] {
64
65 // unnamed module
66
67 { GetModuleTest.class, null },
68 { GetModuleTest[].class, null },
69 { GetModuleTest[][].class, null },
70
71 // should return named module
72
73 { int.class, "java.base" },
74 { int[].class, "java.base" },
75 { int[][].class, "java.base" },
76 { void.class, "java.base" },
77
78 { Object.class, "java.base" },
79 { Object[].class, "java.base" },
80 { Object[][].class, "java.base" },
81 { Component.class, "java.desktop" },
82 { Component[].class, "java.desktop" },
83 { Component[][].class, "java.desktop" },
84 };
85 }
86
87 @Test(dataProvider = "testclasses")
88 public void testGetModule(Class<?> type, String expected) {
89 Module m = type.getModule();
90 assertNotNull(m);
91 if (expected == null) {
92 assertTrue(m == TEST_MODULE);
93 } else {
94 assertEquals(m.getName(), expected);
95 }
96 }
97
98
99 @DataProvider(name = "hostclasses")
100 public Object[][] hostClasses() {
101 return new Object[][] {
102
103 { GetModuleTest.class, null },
104 { GetModuleTest[].class, null },
105 { Object.class, null },
106 { Object[].class, null },
107 { Component.class, null },
108 { Component[].class, null },
109
110 };
111 }
112
113 /**
114 * Exercise Class::getModule on VM anonymous classes
115 */
116 @Test(dataProvider = "hostclasses")
117 public void testGetModuleOnVMAnonymousClass(Class<?> hostClass, String ignore) {
118
119 // choose a class name in the same package as the host class
120 String prefix = packageName(hostClass);
121 if (prefix.length() > 0)
122 prefix = prefix.replace('.', '/') + "/";
123 String className = prefix + "Anon";
124
125 // create the class
126 String superName = "java/lang/Object";
127 ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS
128 + ClassWriter.COMPUTE_FRAMES);
129 cw.visit(V1_8, ACC_PUBLIC + ACC_FINAL + ACC_SUPER,
130 className, null, superName, null);
131 byte[] classBytes = cw.toByteArray();
132 int cpPoolSize = constantPoolSize(classBytes);
133 Class<?> anonClass
134 = U.defineAnonymousClass(hostClass, classBytes, new Object[cpPoolSize]);
135
136 assertTrue(anonClass.getModule() == hostClass.getModule());
137 }
138
139 private static String packageName(Class<?> c) {
140 if (c.isArray()) {
141 return packageName(c.getComponentType());
142 } else {
143 String name = c.getName();
144 int dot = name.lastIndexOf('.');
145 if (dot == -1) return "";
146 return name.substring(0, dot);
147 }
148 }
149
150 private static int constantPoolSize(byte[] classFile) {
151 return ((classFile[8] & 0xFF) << 8) | (classFile[9] & 0xFF);
152 }
153
154 }