1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
|
/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/* @test
* @bug 8032400
* @summary JSR292: invokeSpecial: InternalError attempting to lookup a method
* @modules java.base/jdk.internal.org.objectweb.asm
* @compile -XDignore.symbol.file SpecialStatic.java
* @run junit test.java.lang.invoke.lookup.SpecialStatic
*/
package test.java.lang.invoke.lookup;
import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandles;
import java.lang.invoke.MethodType;
import jdk.internal.org.objectweb.asm.*;
import org.junit.Test;
import static jdk.internal.org.objectweb.asm.Opcodes.*;
import static org.junit.Assert.*;
/**
* Test case:
* class T1 { int m() { return 1; }}
* class T2 extends T1 { static int m() { return 2; }}
* class T3 extends T2 { int m() { return 3; }}
*
* T3::test { invokespecial T1.m() T3 } ==> T1::m
*/
public class SpecialStatic {
static class CustomClassLoader extends ClassLoader {
public Class<?> loadClass(String name) throws ClassNotFoundException {
if (findLoadedClass(name) != null) {
return findLoadedClass(name);
}
if ("T1".equals(name)) {
byte[] classFile = dumpT1();
return defineClass("T1", classFile, 0, classFile.length);
}
if ("T2".equals(name)) {
byte[] classFile = dumpT2();
return defineClass("T2", classFile, 0, classFile.length);
}
if ("T3".equals(name)) {
byte[] classFile = dumpT3();
return defineClass("T3", classFile, 0, classFile.length);
}
return super.loadClass(name);
}
}
private static ClassLoader cl = new CustomClassLoader();
private static Class t1, t3;
static {
try {
t1 = cl.loadClass("T1");
t3 = cl.loadClass("T3");
} catch (ClassNotFoundException e) {
throw new Error(e);
}
}
public static void main(String[] args) throws Throwable {
SpecialStatic test = new SpecialStatic();
test.testConstant();
test.testFindSpecial();
}
@Test
public void testConstant() throws Throwable {
MethodHandle mh = (MethodHandle)t3.getDeclaredMethod("getMethodHandle").invoke(null);
int result = (int)mh.invoke(t3.newInstance());
assertEquals(result, 1); // T1.m should be invoked.
}
@Test
public void testFindSpecial() throws Throwable {
MethodHandles.Lookup lookup = (MethodHandles.Lookup)t3.getDeclaredMethod("getLookup").invoke(null);
MethodHandle mh = lookup.findSpecial(t1, "m", MethodType.methodType(int.class), t3);
int result = (int)mh.invoke(t3.newInstance());
assertEquals(result, 1); // T1.m should be invoked.
}
public static byte[] dumpT1() {
ClassWriter cw = new ClassWriter(0);
MethodVisitor mv;
cw.visit(52, ACC_PUBLIC + ACC_SUPER, "T1", null, "java/lang/Object", null);
mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
mv.visitCode();
mv.visitVarInsn(ALOAD, 0);
mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false);
mv.visitInsn(RETURN);
mv.visitMaxs(1, 1);
mv.visitEnd();
mv = cw.visitMethod(ACC_PUBLIC, "m", "()I", null, null);
mv.visitCode();
mv.visitIntInsn(BIPUSH, 1);
mv.visitInsn(IRETURN);
mv.visitMaxs(1, 1);
mv.visitEnd();
cw.visitEnd();
return cw.toByteArray();
}
public static byte[] dumpT2() {
ClassWriter cw = new ClassWriter(0);
MethodVisitor mv;
cw.visit(52, ACC_PUBLIC + ACC_SUPER, "T2", null, "T1", null);
mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
mv.visitCode();
mv.visitVarInsn(ALOAD, 0);
mv.visitMethodInsn(INVOKESPECIAL, "T1", "<init>", "()V", false);
mv.visitInsn(RETURN);
mv.visitMaxs(1, 1);
mv.visitEnd();
mv = cw.visitMethod(ACC_PUBLIC | ACC_STATIC, "m", "()I", null, null);
mv.visitCode();
mv.visitIntInsn(BIPUSH, 2);
mv.visitInsn(IRETURN);
mv.visitMaxs(1, 1);
mv.visitEnd();
cw.visitEnd();
return cw.toByteArray();
}
public static byte[] dumpT3() {
ClassWriter cw = new ClassWriter(0);
MethodVisitor mv;
cw.visit(52, ACC_PUBLIC + ACC_SUPER, "T3", null, "T2", null);
mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
mv.visitCode();
mv.visitVarInsn(ALOAD, 0);
mv.visitMethodInsn(INVOKESPECIAL, "T2", "<init>", "()V", false);
mv.visitInsn(RETURN);
mv.visitMaxs(1, 1);
mv.visitEnd();
mv = cw.visitMethod(ACC_PUBLIC, "m", "()I", null, null);
mv.visitCode();
mv.visitIntInsn(BIPUSH, 3);
mv.visitInsn(IRETURN);
mv.visitMaxs(1, 1);
mv.visitEnd();
// getMethodHandle
mv = cw.visitMethod(ACC_PUBLIC + ACC_STATIC, "getMethodHandle", "()Ljava/lang/invoke/MethodHandle;", null, null);
mv.visitCode();
mv.visitLdcInsn(new Handle(H_INVOKESPECIAL, "T1", "m", "()I"));
mv.visitInsn(ARETURN);
mv.visitMaxs(1, 0);
mv.visitEnd();
// getLookup
mv = cw.visitMethod(ACC_PUBLIC + ACC_STATIC, "getLookup", "()Ljava/lang/invoke/MethodHandles$Lookup;", null, null);
mv.visitCode();
mv.visitMethodInsn(INVOKESTATIC, "java/lang/invoke/MethodHandles", "lookup", "()Ljava/lang/invoke/MethodHandles$Lookup;", false);
mv.visitInsn(ARETURN);
mv.visitMaxs(1, 0);
mv.visitEnd();
cw.visitEnd();
return cw.toByteArray();
}
}
|
