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
|
/*
* Copyright (c) 2018, 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 8186046
* @summary Test for an interface using condy with default overpass methods
* @library /java/lang/invoke/common
* @build test.java.lang.invoke.lib.InstructionHelper
* @enablePreview
* @run testng CondyInterfaceWithOverpassMethods
* @run testng/othervm -XX:+UnlockDiagnosticVMOptions -XX:UseBootstrapCallInfo=3 CondyInterfaceWithOverpassMethods
*/
import java.lang.classfile.ClassFile;
import org.testng.annotations.BeforeClass;
import org.testng.annotations.Test;
import test.java.lang.invoke.lib.InstructionHelper;
import java.lang.constant.*;
import java.lang.invoke.MethodHandles;
import java.lang.invoke.MethodType;
@Test
public class CondyInterfaceWithOverpassMethods {
interface A {
int a();
default int x() {
return 1;
}
}
// Generated class with methods containing condy ldc
Class<?> gc;
public static Object bsm(MethodHandles.Lookup l, String name, Class<?> type) {
return name;
}
@BeforeClass
public void generateClass() throws Exception {
// interface B extends A {
// // Overpass for method A.a
//
// default void y() {
// // ldc to Dynamic
// }
// }
Class<?> thisClass = CondyInterfaceWithOverpassMethods.class;
String genClassName = thisClass.getSimpleName() + "$Code";
String bsmClassName = thisClass.descriptorString();
String bsmMethodName = "bsm";
String bsmDescriptor = MethodType.methodType(Object.class, MethodHandles.Lookup.class,
String.class, Class.class).toMethodDescriptorString();
byte[] byteArray = ClassFile.of().build(ClassDesc.of(genClassName), classBuilder -> classBuilder
.withFlags(ClassFile.ACC_INTERFACE + ClassFile.ACC_ABSTRACT)
.withSuperclass(ConstantDescs.CD_Object)
.withInterfaceSymbols(InstructionHelper.classDesc(A.class))
.withMethod("y", MethodTypeDesc.of(ConstantDescs.CD_String), ClassFile.ACC_PUBLIC, methodBuilder -> methodBuilder
.withCode(codeBuilder -> codeBuilder
.ldc(DynamicConstantDesc.ofNamed(
MethodHandleDesc.of(
DirectMethodHandleDesc.Kind.STATIC,
ClassDesc.ofDescriptor(bsmClassName),
bsmMethodName,
bsmDescriptor
),
"String",
ConstantDescs.CD_String
)
)
.areturn()
)
)
);
gc = MethodHandles.lookup().defineClass(byteArray);
}
@Test
public void testClass() throws Exception {
// Trigger initialization
Class.forName(gc.getName());
}
}
|
