1 /**
2 * Copyright (c) 2014, 2015, 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.desktop
29 * @run testng GetModuleTest
30 */
31
32 import java.awt.Component;
33 import java.lang.reflect.Field;
34 import java.lang.reflect.Module;
35
36 import jdk.internal.org.objectweb.asm.ClassWriter;
37 import static jdk.internal.org.objectweb.asm.Opcodes.*;
38 import sun.misc.Unsafe;
39
40 import org.testng.annotations.DataProvider;
41 import org.testng.annotations.Test;
42 import static org.testng.Assert.*;
43
44 public class GetModuleTest {
45
46 static final Unsafe U;
47 static {
48 try {
49 Field theUnsafe = Unsafe.class.getDeclaredField("theUnsafe");
50 theUnsafe.setAccessible(true);
51 U = (Unsafe) theUnsafe.get(null);
52 } catch (Exception e) {
53 throw new AssertionError(e);
54 }
55 }
56
57 private static final Module TEST_MODULE = GetModuleTest.class.getModule();
58
59
60 @DataProvider(name = "testclasses")
61 public Object[][] testClasses() {
62 return new Object[][] {
63
64 // unnamed module
65
66 { GetModuleTest.class, null },
67 { GetModuleTest[].class, null },
68 { GetModuleTest[][].class, null },
69
70 // should return named module
71
72 { int.class, "java.base" },
73 { int[].class, "java.base" },
74 { int[][].class, "java.base" },
75 { void.class, "java.base" },
76
77 { Object.class, "java.base" },
78 { Object[].class, "java.base" },
79 { Object[][].class, "java.base" },
80 { Component.class, "java.desktop" },
81 { Component[].class, "java.desktop" },
82 { Component[][].class, "java.desktop" },
83 };
84 }
85
86 @Test(dataProvider = "testClasses")
87 public void testGetModule(Class<?> type, String expected) {
88 Module m = type.getModule();
89 assertNotNull(m);
90 if (expected == null) {
91 assertTrue(m == TEST_MODULE);
92 } else {
93 assertEquals(m.getName(), expected);
94 }
95 }
96
97
98 @DataProvider(name = "hostclasses")
99 public Object[][] hostClasses() {
100 return new Object[][] {
101
102 { GetModuleTest.class, null },
103 { GetModuleTest[].class, null },
104 { Object.class, null },
105 { Object[].class, null },
106 { Component.class, null },
107 { Component[].class, null },
108
109 };
110 }
111
112 /**
113 * Exercise Class::getModule on VM anonymous classes
114 */
115 @Test(dataProvider = "hostclasses")
116 public void testGetModuleOnVMAnonymousClass(Class<?> hostClass, String ignore) {
117
118 // choose a class name in the same package as the host class
119 String prefix = packageName(hostClass);
120 if (prefix.length() > 0)
121 prefix = prefix.replace('.', '/') + "/";
122 String className = prefix + "Anon";
123
124 // create the class
125 String superName = "java/lang/Object";
126 ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS
127 + ClassWriter.COMPUTE_FRAMES);
128 cw.visit(V1_8, ACC_PUBLIC + ACC_FINAL + ACC_SUPER,
129 className, null, superName, null);
130 byte[] classBytes = cw.toByteArray();
131 int cpPoolSize = constantPoolSize(classBytes);
132 Class<?> anonClass
133 = U.defineAnonymousClass(hostClass, classBytes, new Object[cpPoolSize]);
134
135 assertTrue(anonClass.getModule() == hostClass.getModule());
136 }
137
138 private static String packageName(Class<?> c) {
139 if (c.isArray()) {
140 return packageName(c.getComponentType());
141 } else {
142 String name = c.getName();
143 int dot = name.lastIndexOf('.');
144 if (dot == -1) return "";
145 return name.substring(0, dot);
146 }
147 }
148
149 private static int constantPoolSize(byte[] classFile) {
150 return ((classFile[8] & 0xFF) << 8) | (classFile[9] & 0xFF);
151 }
152
153 }