1 /*
2 * Copyright (c) 2014, 2024, 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 /* @test
25 * @bug 8032400
26 * @summary JSR292: invokeSpecial: InternalError attempting to lookup a method
27 * @compile -XDignore.symbol.file SpecialStatic.java
28 * @run testng test.java.lang.invoke.lookup.SpecialStatic
29 */
30 package test.java.lang.invoke.lookup;
31
32 import java.lang.classfile.ClassFile;
33 import java.lang.constant.ClassDesc;
34 import java.lang.constant.MethodHandleDesc;
35 import java.lang.constant.MethodTypeDesc;
36 import java.lang.invoke.MethodHandle;
37 import java.lang.invoke.MethodHandles;
38 import java.lang.invoke.MethodType;
39 import java.lang.reflect.AccessFlag;
40
41 import org.testng.annotations.*;
42
43 import static java.lang.classfile.ClassFile.ACC_PUBLIC;
44 import static java.lang.classfile.ClassFile.ACC_STATIC;
45 import static java.lang.constant.ConstantDescs.*;
46 import static java.lang.constant.DirectMethodHandleDesc.Kind.SPECIAL;
47 import static org.testng.Assert.*;
48
49 /**
50 * Test case:
51 * class T1 { int m() { return 1; }}
52 * class T2 extends T1 { static int m() { return 2; }}
53 * class T3 extends T2 { int m() { return 3; }}
54 *
55 * T3::test { invokespecial T1.m() T3 } ==> T1::m
56 */
57 public class SpecialStatic {
58 static class CustomClassLoader extends ClassLoader {
59 public Class<?> loadClass(String name) throws ClassNotFoundException {
60 if (findLoadedClass(name) != null) {
61 return findLoadedClass(name);
62 }
63
64 if ("T1".equals(name)) {
65 byte[] classFile = dumpT1();
66 return defineClass("T1", classFile, 0, classFile.length);
67 }
68 if ("T2".equals(name)) {
69 byte[] classFile = dumpT2();
70 return defineClass("T2", classFile, 0, classFile.length);
71 }
72 if ("T3".equals(name)) {
73 byte[] classFile = dumpT3();
74 return defineClass("T3", classFile, 0, classFile.length);
75 }
76
77 return super.loadClass(name);
78 }
79 }
80
81 private static ClassLoader cl = new CustomClassLoader();
82 private static Class t1, t3;
83 private static final MethodTypeDesc MTD_int = MethodTypeDesc.of(CD_int);
84 private static final MethodTypeDesc MTD_Lookup = MethodTypeDesc.of(CD_MethodHandles_Lookup);
85 private static final String METHOD_NAME = "m";
86 private static final ClassDesc CD_T1 = ClassDesc.of("T1");
87 private static final ClassDesc CD_T2 = ClassDesc.of("T2");
88 private static final ClassDesc CD_T3 = ClassDesc.of("T3");
89 static {
90 try {
91 t1 = cl.loadClass("T1");
92 t3 = cl.loadClass("T3");
93 } catch (ClassNotFoundException e) {
94 throw new Error(e);
95 }
96 }
97
98 public static void main(String[] args) throws Throwable {
99 SpecialStatic test = new SpecialStatic();
100 test.testConstant();
101 test.testFindSpecial();
102 }
103
104 @Test
105 public void testConstant() throws Throwable {
106 MethodHandle mh = (MethodHandle)t3.getDeclaredMethod("getMethodHandle").invoke(null);
107 int result = (int)mh.invoke(t3.newInstance());
108 assertEquals(result, 1); // T1.m should be invoked.
109 }
110
111 @Test
112 public void testFindSpecial() throws Throwable {
113 MethodHandles.Lookup lookup = (MethodHandles.Lookup)t3.getDeclaredMethod("getLookup").invoke(null);
114 MethodHandle mh = lookup.findSpecial(t1, "m", MethodType.methodType(int.class), t3);
115 int result = (int)mh.invoke(t3.newInstance());
116 assertEquals(result, 1); // T1.m should be invoked.
117 }
118
119 public static byte[] dumpT1() {
120 return ClassFile.of().build(CD_T1, clb -> {
121 clb.withSuperclass(CD_Object);
122 clb.withFlags(AccessFlag.PUBLIC, AccessFlag.SUPER);
123 clb.withMethodBody(INIT_NAME, MTD_void, ACC_PUBLIC, cob -> {
124 cob.aload(0);
125 cob.invokespecial(CD_Object, INIT_NAME, MTD_void);
126 cob.return_();
127 });
128 clb.withMethodBody(METHOD_NAME, MTD_int, ACC_PUBLIC, cob -> {
129 cob.bipush(1);
130 cob.ireturn();
131 });
132 });
133 }
134
135 public static byte[] dumpT2() {
136 return ClassFile.of().build(CD_T2, clb -> {
137 clb.withSuperclass(CD_T1);
138 clb.withFlags(AccessFlag.PUBLIC, AccessFlag.SUPER);
139 clb.withMethodBody(INIT_NAME, MTD_void, ACC_PUBLIC, cob -> {
140 cob.aload(0);
141 cob.invokespecial(CD_T1, INIT_NAME, MTD_void);
142 cob.return_();
143 });
144 clb.withMethodBody(METHOD_NAME, MTD_int, ACC_PUBLIC | ACC_STATIC, cob -> {
145 cob.bipush(2);
146 cob.ireturn();
147 });
148 });
149 }
150
151 public static byte[] dumpT3() {
152 return ClassFile.of().build(CD_T3, clb -> {
153 clb.withSuperclass(CD_T2);
154 clb.withFlags(AccessFlag.PUBLIC, AccessFlag.SUPER);
155 clb.withMethodBody(INIT_NAME, MTD_void, ACC_PUBLIC, cob -> {
156 cob.aload(0);
157 cob.invokespecial(CD_T2, INIT_NAME, MTD_void);
158 cob.return_();
159 });
160 clb.withMethodBody(METHOD_NAME, MTD_int, ACC_PUBLIC, cob -> {
161 cob.bipush(3);
162 cob.ireturn();
163 });
164 clb.withMethodBody("getMethodHandle", MethodTypeDesc.of(CD_MethodHandle),
165 ACC_PUBLIC | ACC_STATIC, cob -> {
166 cob.loadConstant(MethodHandleDesc.ofMethod(SPECIAL, CD_T1, METHOD_NAME, MTD_int));
167 cob.areturn();
168 });
169 clb.withMethodBody("getLookup", MTD_Lookup,
170 ACC_PUBLIC | ACC_STATIC, cob -> {
171 cob.invokestatic(CD_MethodHandles, "lookup", MTD_Lookup);
172 cob.areturn();
173 });
174 });
175 }
176 }