1 /*
2 * Copyright (c) 2020, 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 * @bug 8242013
27 * @run testng/othervm test.TypeDescriptorTest
28 * @summary Test TypeDescriptor::descriptorString for hidden classes which
29 * cannot be used to produce ConstantDesc via ClassDesc or
30 * MethodTypeDesc factory methods
31 */
32
33 package test;
34
35 import java.io.IOException;
36 import java.io.UncheckedIOException;
37 import java.lang.constant.*;
38 import java.lang.invoke.*;
39 import java.lang.invoke.MethodHandles.Lookup;
40 import java.lang.reflect.Array;
41 import java.nio.file.Files;
42 import java.nio.file.Paths;
43 import static java.lang.invoke.MethodType.*;
44
45 import org.testng.annotations.Test;
46 import org.testng.annotations.DataProvider;
47 import static org.testng.Assert.*;
48
49 public class TypeDescriptorTest {
50 private static final Lookup HC_LOOKUP = defineHiddenClass();
51 private static final Class<?> HC = HC_LOOKUP.lookupClass();
52 private static Lookup defineHiddenClass() {
53 String classes = System.getProperty("test.classes");
54 try {
55 byte[] bytes = Files.readAllBytes(Paths.get(classes, "test/HiddenClass.class"));
56 return MethodHandles.lookup().defineHiddenClass(bytes, true);
57 } catch (IOException e) {
58 throw new UncheckedIOException(e);
59 } catch (IllegalAccessException e) {
60 throw new RuntimeException(e);
61 }
62 }
63
64 @DataProvider(name = "constables")
65 private Object[][] constables() throws Exception {
66 return new Object[][] {
67 new Object[] { HC },
68 new Object[] { methodType(HC) },
69 new Object[] { methodType(void.class, HC) },
70 new Object[] { methodType(void.class, HC, int.class) },
71 new Object[] { HC_LOOKUP.findStatic(HC, "m", methodType(void.class)) },
72 new Object[] { HC_LOOKUP.findStaticVarHandle(HC, "f", Object.class) }
73 };
74 }
75
76 /*
77 * Hidden classes have no nominal descriptor.
78 * Constable::describeConstable returns empty optional.
79 */
80 @Test(dataProvider = "constables")
81 public void noNominalDescriptor(Constable constable) {
82 assertTrue(constable.describeConstable().isEmpty());
83 }
84
85 /*
86 * ClassDesc factory methods throws IAE with the name or descriptor string
87 * from a hidden class
88 */
89 @Test
90 public void testClassDesc() {
91 try {
92 ClassDesc.ofDescriptor(HC.descriptorString());
93 assertFalse(true);
94 } catch (IllegalArgumentException e) {
95 System.out.println(e.getClass().getName() + " " + e.getMessage());
96 }
97
98 try {
99 ClassDesc.ofDescriptor(HC.getName());
100 assertFalse(true);
101 } catch (IllegalArgumentException e) {
102 System.out.println(e.getClass().getName() + " " + e.getMessage());
103 }
104 try {
105 ClassDesc.of(HC.getPackageName(), HC.getSimpleName());
106 assertFalse(true);
107 } catch (IllegalArgumentException e) {
108 System.out.println(e.getClass().getName() + " " + e.getMessage());
109 }
110 try {
111 ClassDesc.of(HC.getName());
112 assertFalse(true);
113 } catch (IllegalArgumentException e) {
114 System.out.println(e.getClass().getName() + " " + e.getMessage());
115 }
116 }
117
118 @DataProvider(name = "typeDescriptors")
119 private Object[][] typeDescriptors() throws Exception {
120 Class<?> hcArray = Array.newInstance(HC, 1, 1).getClass();
121 return new Object[][] {
122 new Object[] { HC, "Ltest/HiddenClass.0x[0-9a-f]+;"},
123 new Object[] { hcArray, "\\[\\[Ltest/HiddenClass.0x[0-9a-f]+;"},
124 new Object[] { methodType(HC), "\\(\\)Ltest/HiddenClass.0x[0-9a-f]+;" },
125 new Object[] { methodType(void.class, HC), "\\(Ltest/HiddenClass.0x[0-9a-f]+;\\)V" },
126 new Object[] { methodType(void.class, HC, int.class, Object.class), "\\(Ltest/HiddenClass.0x[0-9a-f]+;ILjava/lang/Object;\\)V" }
127 };
128 }
129
130 /*
131 * Hidden classes have no nominal type descriptor
132 */
133 @Test(dataProvider = "typeDescriptors")
134 public void testTypeDescriptor(TypeDescriptor td, String regex) throws Exception {
135 String desc = td.descriptorString();
136 System.out.println(desc + " " + desc.matches(regex));
137 assertTrue(desc.matches(regex));
138
139 if (td instanceof Class) {
140 try {
141 ClassDesc.ofDescriptor(desc);
142 assertFalse(true);
143 } catch (IllegalArgumentException e) {
144 System.out.println(e.getClass().getName() + " " + e.getMessage());
145 }
146 } else if (td instanceof MethodType) {
147 try {
148 MethodTypeDesc.ofDescriptor(desc);
149 assertFalse(true);
150 } catch (IllegalArgumentException e) {
151 System.out.println(e.getClass().getName() + " " + e.getMessage());
152 }
153 }
154 }
155
156 @DataProvider(name = "methodTypes")
157 private Object[][] methodTypes() throws Exception {
158 Class<?> hcArray = Array.newInstance(HC, 1, 1).getClass();
159 return new Object[][] {
160 new Object[] { methodType(HC), "\\(\\)Ltest/HiddenClass.0x[0-9a-f]+;" },
161 new Object[] { methodType(void.class, hcArray), "\\(\\[\\[Ltest/HiddenClass.0x[0-9a-f]+;\\)V" },
162 new Object[] { methodType(void.class, int.class, HC), "\\(ILtest/HiddenClass.0x[0-9a-f]+;\\)V" }
163 };
164 }
165
166 /*
167 * Test MethodType::toMethodDescriptorString with MethodType referencing to hidden class
168 */
169 @Test(dataProvider = "methodTypes")
170 public void testToMethodDescriptorString(MethodType mtype, String regex) throws Exception {
171 String desc = mtype.toMethodDescriptorString();
172 assertTrue(desc.matches(regex));
173
174 try {
175 MethodType.fromMethodDescriptorString(desc, TypeDescriptorTest.class.getClassLoader());
176 } catch (IllegalArgumentException e) {
177 System.out.println("not-well formed: " + desc);
178 }
179 }
180 }
181
182 class HiddenClass {
183 private static final Object f = new Object();
184 public static void m() {
185 }
186 }