1 /*
2 * Copyright (c) 2017, 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 8046171
27 * @summary Test access to private static fields between nestmates and nest-top
28 * using different flavours of named nested types using core reflection
29 * @compile -XDdisablePrivateAccessors TestMethodHandles.java
30 * @run main TestMethodHandles
31 */
32
33 import java.lang.invoke.*;
34 import static java.lang.invoke.MethodHandles.*;
35
36 import java.lang.reflect.Field;
37
38 public class TestMethodHandles {
39
40 // private static field of nest-top for nestmates to access
41 private static int priv_field;
42
43 // public constructor so we aren't relying on private access
44 public TestMethodHandles() {}
45
46 // Methods that will access private static fields of nestmates
47
48 // NOTE: No InnerNested calls in this test because non-static nested types
49 // can't have static fields. Also no StaticIface calls as static interface
50 // fields must be public (and final)
51
52 void access_priv(TestMethodHandles o) throws Throwable {
53 MethodHandle mh = lookup().findStaticGetter(o.getClass(), "priv_field", int.class);
54 priv_field = (int) mh.invoke();
55 priv_field = (int) mh.invokeExact();
56 mh = lookup().findStaticSetter(o.getClass(), "priv_field", int.class);
57 mh.invoke(2);
58 mh.invokeExact(3);
59 }
60 void access_priv(StaticNested o) throws Throwable {
61 MethodHandle mh = lookup().findStaticGetter(o.getClass(), "priv_field", int.class);
62 priv_field = (int) mh.invoke();
63 priv_field = (int) mh.invokeExact();
64 mh = lookup().findStaticSetter(o.getClass(), "priv_field", int.class);
65 mh.invoke(2);
66 mh.invokeExact(3);
67 }
68
69 // The various nestmates
70
71 static interface StaticIface {
72
73 // Methods that will access private static fields of nestmates
74
75 default void access_priv(TestMethodHandles o) throws Throwable {
76 MethodHandle mh = lookup().findStaticGetter(o.getClass(), "priv_field", int.class);
77 int priv_field = (int) mh.invoke();
78 priv_field = (int) mh.invokeExact();
79 mh = lookup().findStaticSetter(o.getClass(), "priv_field", int.class);
80 mh.invoke(2);
81 mh.invokeExact(3);
82 }
83 default void access_priv(StaticNested o) throws Throwable {
84 MethodHandle mh = lookup().findStaticGetter(o.getClass(), "priv_field", int.class);
85 int priv_field = (int) mh.invoke();
86 priv_field = (int) mh.invokeExact();
87 mh = lookup().findStaticSetter(o.getClass(), "priv_field", int.class);
88 mh.invoke(2);
89 mh.invokeExact(3);
90 }
91 }
92
93 static class StaticNested {
94
95 private static int priv_field;
96
97 // public constructor so we aren't relying on private access
98 public StaticNested() {}
99
100 // Methods that will access private static fields of nestmates
101
102 void access_priv(TestMethodHandles o) throws Throwable {
103 MethodHandle mh = lookup().findStaticGetter(o.getClass(), "priv_field", int.class);
104 priv_field = (int) mh.invoke();
105 priv_field = (int) mh.invokeExact();
106 mh = lookup().findStaticSetter(o.getClass(), "priv_field", int.class);
107 mh.invoke(2);
108 mh.invokeExact(3);
109 }
110 void access_priv(StaticNested o) throws Throwable {
111 MethodHandle mh = lookup().findStaticGetter(o.getClass(), "priv_field", int.class);
112 priv_field = (int) mh.invoke();
113 priv_field = (int) mh.invokeExact();
114 mh = lookup().findStaticSetter(o.getClass(), "priv_field", int.class);
115 mh.invoke(2);
116 mh.invokeExact(3);
117 }
118 }
119
120 class InnerNested {
121
122 // public constructor so we aren't relying on private access
123 public InnerNested() {}
124
125 void access_priv(TestMethodHandles o) throws Throwable {
126 MethodHandle mh = lookup().findStaticGetter(o.getClass(), "priv_field", int.class);
127 priv_field = (int) mh.invoke();
128 priv_field = (int) mh.invokeExact();
129 mh = lookup().findStaticSetter(o.getClass(), "priv_field", int.class);
130 mh.invoke(2);
131 mh.invokeExact(3);
132 }
133 void access_priv(StaticNested o) throws Throwable {
134 MethodHandle mh = lookup().findStaticGetter(o.getClass(), "priv_field", int.class);
135 priv_field = (int) mh.invoke();
136 priv_field = (int) mh.invokeExact();
137 mh = lookup().findStaticSetter(o.getClass(), "priv_field", int.class);
138 mh.invoke(2);
139 mh.invokeExact(3);
140 }
141 }
142
143 public static void main(String[] args) throws Throwable {
144 TestMethodHandles o = new TestMethodHandles();
145 StaticNested s = new StaticNested();
146 InnerNested i = o.new InnerNested();
147 StaticIface intf = new StaticIface() {};
148
149 o.access_priv(new TestMethodHandles());
150 o.access_priv(s);
151
152 s.access_priv(o);
153 s.access_priv(new StaticNested());
154
155 i.access_priv(o);
156 i.access_priv(s);
157
158 intf.access_priv(o);
159 intf.access_priv(s);
160 }
161 }