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 methods between nestmates where there
28 * is an inheritance hierarchy and we invoke private methods that
29 * exist in specific classes in the hierarchy.
30 * @run main TestMethodHandlesHierarchy
31 */
32
33 import java.lang.invoke.*;
34 import static java.lang.invoke.MethodHandles.*;
35 import static java.lang.invoke.MethodType.*;
36
37 public class TestMethodHandlesHierarchy {
38
39 static final MethodType M_T = MethodType.methodType(String.class);
40
41 static class NestedA extends ExternalSuper {
42 static final String ID = "NestedA::priv_invoke";
43 private String priv_invoke() {
44 return ID;
45 }
46 static void checkA(NestedA a) throws Throwable {
47 MethodHandle mh =
48 lookup().findSpecial(NestedA.class, "priv_invoke",
49 M_T, NestedA.class);
50 verifyEquals((String)mh.invoke(a), NestedA.ID);
51 verifyEquals((String)mh.invokeExact(a), NestedA.ID);
52
53 mh = lookup().findVirtual(NestedA.class, "priv_invoke", M_T);
54 verifyEquals((String)mh.invoke(a), NestedA.ID);
55 verifyEquals((String)mh.invokeExact(a), NestedA.ID);
56 }
57 }
58
59 static class NestedB extends NestedA {
60 static final String ID = "NestedB::priv_invoke";
61 private String priv_invoke() {
62 return ID;
63 }
64 static void checkA(NestedA a) throws Throwable {
65 MethodHandle mh =
66 lookup().findVirtual(NestedA.class, "priv_invoke", M_T);
67 verifyEquals((String)mh.invoke(a), NestedA.ID);
68 verifyEquals((String)mh.invokeExact(a), NestedA.ID);
69 }
70 }
71
72 static class NestedC extends NestedB {
73 static final String ID = "NestedC::priv_invoke";
74 private String priv_invoke() {
75 return ID;
76 }
77 static void checkA(NestedA a) throws Throwable {
78 MethodHandle mh =
79 lookup().findVirtual(NestedA.class, "priv_invoke", M_T);
80 verifyEquals((String)mh.invoke(a), NestedA.ID);
81 verifyEquals((String)mh.invokeExact(a), NestedA.ID);
82 }
83 }
84
85 static void checkA(NestedA a) throws Throwable {
86 MethodHandle mh =
87 lookup().findVirtual(NestedA.class, "priv_invoke", M_T);
88 verifyEquals((String)mh.invoke(a), NestedA.ID);
89 verifyEquals((String)mh.invokeExact(a), NestedA.ID);
90 }
91
92 static void checkB(NestedB b) throws Throwable {
93 MethodHandle mh =
94 lookup().findVirtual(NestedB.class, "priv_invoke", M_T);
95 verifyEquals((String)mh.invoke(b), NestedB.ID);
96 verifyEquals((String)mh.invokeExact(b), NestedB.ID);
97 }
98
99 static void checkC(NestedC c) throws Throwable {
100 MethodHandle mh =
101 lookup().findVirtual(NestedC.class, "priv_invoke", M_T);
102 verifyEquals((String)mh.invoke(c), NestedC.ID);
103 verifyEquals((String)mh.invokeExact(c), NestedC.ID);
104 }
105
106
107 // Access to private members of classes outside the nest is
108 // not permitted. These tests should throw IllegalAccessException
109 // at runtime.
110
111 static void checkExternalSuper(ExternalSuper s) throws Throwable {
112 try {
113 lookup().findVirtual(ExternalSuper.class, "priv_invoke", M_T);
114 throw new Error("Unexpected access to ExternalSuper.priv_invoke");
115 }
116 catch (IllegalAccessException iae) {
117 System.out.println("Got expected exception accessing ExternalSuper.priv_invoke:" + iae);
118 }
119 }
120
121 static void checkExternalSub(ExternalSub s) throws Throwable {
122 try {
123 lookup().findVirtual(ExternalSub.class, "priv_invoke", M_T);
124 throw new Error("Unexpected access to ExternalSub.priv_invoke");
125 }
126 catch (IllegalAccessException iae) {
127 System.out.println("Got expected exception accessing ExternalSub.priv_invoke:" + iae);
128 }
129 }
130
131 static void verifyEquals(String actual, String expected) {
132 if (!actual.equals(expected)) {
133 throw new Error("Expected " + expected + " but got " + actual);
134 }
135 System.out.println("Check passed for " + expected);
136 }
137
138 public static void main(String[] args) throws Throwable {
139 NestedA a = new NestedA();
140 NestedB b = new NestedB();
141 NestedC c = new NestedC();
142 ExternalSub sub = new ExternalSub();
143 ExternalSuper sup = new ExternalSuper();
144
145 checkExternalSuper(sup);
146 checkExternalSuper(a);
147 checkExternalSuper(b);
148 checkExternalSuper(c);
149 checkExternalSuper(sub);
150
151 checkA(a);
152 checkA(b);
153 checkA(c);
154 checkA(sub);
155
156 NestedA.checkA(a);
157 NestedA.checkA(b);
158 NestedA.checkA(c);
159 NestedA.checkA(sub);
160
161 NestedB.checkA(a);
162 NestedB.checkA(b);
163 NestedB.checkA(c);
164 NestedB.checkA(sub);
165
166 NestedC.checkA(a);
167 NestedC.checkA(b);
168 NestedC.checkA(c);
169 NestedC.checkA(sub);
170
171 checkB(b);
172 checkB(c);
173 checkB(sub);
174
175 checkC(c);
176 checkC(sub);
177
178 checkExternalSub(sub);
179 }
180 }
181
182 // Classes that are not part of the nest.
183 // Being non-public allows us to declare them in this file.
184
185 class ExternalSuper {
186 static final String ID = "ExternalSuper::priv_invoke";
187 private String priv_invoke() {
188 return ID;
189 }
190 }
191
192
193 class ExternalSub extends TestMethodHandlesHierarchy.NestedC {
194 static final String ID = "ExternalSub::priv_invoke";
195 private String priv_invoke() {
196 return ID;
197 }
198 }