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 Class<?> hcArray = Array.newInstance(HC, 1).getClass();
67 return new Object[][] {
68 new Object[] { HC },
69 new Object[] { hcArray },
70 new Object[] { methodType(HC) },
71 new Object[] { methodType(void.class, HC) },
72 new Object[] { methodType(void.class, HC, int.class) },
73 new Object[] { HC_LOOKUP.findStatic(HC, "m", methodType(void.class)) },
74 new Object[] { HC_LOOKUP.findStaticVarHandle(HC, "f", Object.class) }
75 };
76 }
77
78 /*
79 * Hidden classes have no nominal descriptor.
80 * Constable::describeConstable returns empty optional.
81 */
82 @Test(dataProvider = "constables")
83 public void noNominalDescriptor(Constable constable) {
84 assertTrue(constable.describeConstable().isEmpty());
85 }
86
87 /*
88 * ClassDesc factory methods throws IAE with the name or descriptor string
89 * from a hidden class
90 */
91 @Test
92 public void testClassDesc() {
93 try {
94 ClassDesc.ofDescriptor(HC.descriptorString());
95 assertFalse(true);
96 } catch (IllegalArgumentException e) {}
97
98 try {
99 ClassDesc.ofDescriptor(HC.getName());
100 assertFalse(true);
101 } catch (IllegalArgumentException e) {}
102 try {
103 ClassDesc.of(HC.getPackageName(), HC.getSimpleName());
104 assertFalse(true);
105 } catch (IllegalArgumentException e) {}
106 try {
107 ClassDesc.of(HC.getName());
108 assertFalse(true);
109 } catch (IllegalArgumentException e) {}
110 }
111
112 @DataProvider(name = "typeDescriptors")
113 private Object[][] typeDescriptors() throws Exception {
114 Class<?> hcArray = Array.newInstance(HC, 1, 1).getClass();
115 return new Object[][] {
116 new Object[] { HC, "Ltest/HiddenClass.0x[0-9a-f]+;"},
117 new Object[] { hcArray, "\\[\\[Ltest/HiddenClass.0x[0-9a-f]+;"},
118 new Object[] { methodType(HC), "\\(\\)Ltest/HiddenClass.0x[0-9a-f]+;" },
119 new Object[] { methodType(void.class, HC), "\\(Ltest/HiddenClass.0x[0-9a-f]+;\\)V" },
120 new Object[] { methodType(void.class, HC, int.class, Object.class), "\\(Ltest/HiddenClass.0x[0-9a-f]+;ILjava/lang/Object;\\)V" }
121 };
122 }
123
124 /*
125 * Hidden classes have no nominal type descriptor
126 */
127 @Test(dataProvider = "typeDescriptors")
128 public void testTypeDescriptor(TypeDescriptor td, String regex) throws Exception {
129 String desc = td.descriptorString();
130 assertTrue(desc.matches(regex));
131
132 if (td instanceof Class) {
133 try {
134 ClassDesc.ofDescriptor(desc);
135 assertFalse(true);
136 } catch (IllegalArgumentException e) {}
137 } else if (td instanceof MethodType) {
138 try {
139 MethodTypeDesc.ofDescriptor(desc);
140 assertFalse(true);
141 } catch (IllegalArgumentException e) {}
142 }
143 }
144
145 @DataProvider(name = "methodTypes")
146 private Object[][] methodTypes() throws Exception {
147 Class<?> hcArray = Array.newInstance(HC, 1, 1).getClass();
148 return new Object[][] {
149 new Object[] { methodType(HC), "\\(\\)Ltest/HiddenClass.0x[0-9a-f]+;" },
150 new Object[] { methodType(void.class, hcArray), "\\(\\[\\[Ltest/HiddenClass.0x[0-9a-f]+;\\)V" },
151 new Object[] { methodType(void.class, int.class, HC), "\\(ILtest/HiddenClass.0x[0-9a-f]+;\\)V" }
152 };
153 }
154
155 /*
156 * Test MethodType::toMethodDescriptorString with MethodType referencing to hidden class
157 */
158 @Test(dataProvider = "methodTypes")
159 public void testToMethodDescriptorString(MethodType mtype, String regex) throws Exception {
160 String desc = mtype.toMethodDescriptorString();
161 assertTrue(desc.matches(regex));
162
163 try {
164 MethodType.fromMethodDescriptorString(desc, TypeDescriptorTest.class.getClassLoader());
165 assertFalse(true);
166 } catch (IllegalArgumentException e) {}
167 }
168 }
169
170 class HiddenClass {
171 private static final Object f = new Object();
172 public static void m() {
173 }
174 }