1 /*
2 * Copyright (c) 2012, 2013, 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. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 /**
27 * @test
28 * @bug 8003639
29 * @summary defaultMethod resolution and verification
30 * @run main DefaultMethodRegressionTests
31 */
32
33 import java.util.ArrayList;
34 import java.util.Arrays;
35 import java.util.List;
36
37 /**
38 * This set of classes/interfaces (K/I/C) is specially designed to expose a
39 * bug in the JVM where it did not find some overloaded methods in some
40 * specific situations. (fixed by hotspot changeset ffb9316fd9ed).
41 */
42 interface K {
43 int bbb(Long l);
44 }
45
46 interface I extends K {
47 default void aaa() {}
48 default void aab() {}
49 default void aac() {}
50
51 default int bbb(Integer i) { return 22; }
52 default int bbb(Float f) { return 33; }
53 default int bbb(Long l) { return 44; }
54 default int bbb(Double d) { return 55; }
55 default int bbb(String s) { return 66; }
56
57 default void caa() {}
58 default void cab() {}
59 default void cac() {}
60 }
61
62 class C implements I {}
63
64 public class DefaultMethodRegressionTests {
65 public static void main(String... args) {
66 new DefaultMethodRegressionTests().run(args);
67 }
68 void run(String... args) {
69 testLostOverloadedMethod();
70 System.out.println("testLostOverloadedMethod: OK");
71 testInferenceVerifier();
72 System.out.println("testInferenceVerifier: OK");
73 }
74 void testLostOverloadedMethod() {
75 C c = new C();
76 assertEquals(c.bbb(new Integer(1)), 22);
77 assertEquals(c.bbb(new Float(1.1)), 33);
78 assertEquals(c.bbb(new Long(1L)), 44);
79 assertEquals(c.bbb(new Double(0.01)), 55);
80 assertEquals(c.bbb(new String("")), 66);
81 }
82 // Test to ensure that the inference verifier accepts older classfiles
83 // with classes that implement interfaces with defaults.
84 void testInferenceVerifier() {
85 // interface I { int m() default { return 99; } }
86 byte I_bytes[] = {
87 (byte)0xca, (byte)0xfe, (byte)0xba, (byte)0xbe, 0x00, 0x00, 0x00, 0x34,
88 0x00, 0x08, 0x07, 0x00, 0x06, 0x07, 0x00, 0x07,
89 0x01, 0x00, 0x03, 0x66, 0x6f, 0x6f, 0x01, 0x00,
90 0x03, 0x28, 0x29, 0x49, 0x01, 0x00, 0x04, 0x43,
91 0x6f, 0x64, 0x65, 0x01, 0x00, 0x01, 0x49, 0x01,
92 0x00, 0x10, 0x6a, 0x61, 0x76, 0x61, 0x2f, 0x6c,
93 0x61, 0x6e, 0x67, 0x2f, 0x4f, 0x62, 0x6a, 0x65,
94 0x63, 0x74, 0x06, 0x00, 0x00, 0x01, 0x00, 0x02,
95 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02, 0x01,
96 0x00, 0x03, 0x00, 0x04, 0x00, 0x01, 0x00, 0x05,
97 0x00, 0x00, 0x00, 0x0f, 0x00, 0x01, 0x00, 0x01,
98 0x00, 0x00, 0x00, 0x03, 0x10, 0x63, (byte)0xac, 0x00,
99 0x00, 0x00, 0x00, 0x00, 0x00
100 };
101 // public class C implements I {} /* -target 1.5 */
102 byte C_bytes[] = {
103 (byte)0xca, (byte)0xfe, (byte)0xba, (byte)0xbe, 0x00, 0x00, 0x00, 0x31,
104 0x00, 0x0c, 0x0a, 0x00, 0x03, 0x00, 0x08, 0x07,
105 0x00, 0x09, 0x07, 0x00, 0x0a, 0x07, 0x00, 0x0b,
106 0x01, 0x00, 0x06, 0x3c, 0x69, 0x6e, 0x69, 0x74,
107 0x3e, 0x01, 0x00, 0x03, 0x28, 0x29, 0x56, 0x01,
108 0x00, 0x04, 0x43, 0x6f, 0x64, 0x65, 0x0c, 0x00,
109 0x05, 0x00, 0x06, 0x01, 0x00, 0x01, 0x43, 0x01,
110 0x00, 0x10, 0x6a, 0x61, 0x76, 0x61, 0x2f, 0x6c,
111 0x61, 0x6e, 0x67, 0x2f, 0x4f, 0x62, 0x6a, 0x65,
112 0x63, 0x74, 0x01, 0x00, 0x01, 0x49, 0x00, 0x21,
113 0x00, 0x02, 0x00, 0x03, 0x00, 0x01, 0x00, 0x04,
114 0x00, 0x00, 0x00, 0x01, 0x00, 0x01, 0x00, 0x05,
115 0x00, 0x06, 0x00, 0x01, 0x00, 0x07, 0x00, 0x00,
116 0x00, 0x11, 0x00, 0x01, 0x00, 0x01, 0x00, 0x00,
117 0x00, 0x05, 0x2a, (byte)0xb7, 0x00, 0x01, (byte)0xb1, 0x00,
118 0x00, 0x00, 0x00, 0x00, 0x00
119 };
120
121 ClassLoader cl = new ClassLoader() {
122 protected Class<?> findClass(String name) {
123 if (name.equals("I")) {
124 return defineClass("I", I_bytes, 0, I_bytes.length);
125 } else if (name.equals("C")) {
126 return defineClass("C", C_bytes, 0, C_bytes.length);
127 } else {
128 return null;
129 }
130 }
131 };
132 try {
133 Class.forName("C", true, cl);
134 } catch (Exception e) {
135 // unmodified verifier will throw VerifyError
136 throw new RuntimeException(e);
137 }
138 }
139 void assertEquals(Object o1, Object o2) {
140 System.out.print("Expected: " + o1);
141 System.out.println(", Obtained: " + o2);
142 if (!o1.equals(o2)) {
143 throw new RuntimeException("got unexpected values");
144 }
145 }
146 }