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.
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 8003639
27 * @summary defaultMethod resolution and verification
28 * @run main DefaultMethodRegressionTests
29 */
30
31 import java.util.ArrayList;
32 import java.util.Arrays;
33 import java.util.List;
34
35 /**
36 * This set of classes/interfaces (K/I/C) is specially designed to expose a
37 * bug in the JVM where it did not find some overloaded methods in some
38 * specific situations. (fixed by hotspot changeset ffb9316fd9ed).
39 */
40 interface K {
41 int bbb(Long l);
42 }
43
44 interface I extends K {
45 default void aaa() {}
46 default void aab() {}
47 default void aac() {}
48
49 default int bbb(Integer i) { return 22; }
50 default int bbb(Float f) { return 33; }
51 default int bbb(Long l) { return 44; }
52 default int bbb(Double d) { return 55; }
53 default int bbb(String s) { return 66; }
54
55 default void caa() {}
56 default void cab() {}
57 default void cac() {}
58 }
59
60 class C implements I {}
61
62 public class DefaultMethodRegressionTests {
63 public static void main(String... args) {
64 new DefaultMethodRegressionTests().run(args);
65 }
66 void run(String... args) {
67 testLostOverloadedMethod();
68 System.out.println("testLostOverloadedMethod: OK");
69 testInferenceVerifier();
70 System.out.println("testInferenceVerifier: OK");
71 }
72 void testLostOverloadedMethod() {
73 C c = new C();
74 assertEquals(c.bbb(new Integer(1)), 22);
75 assertEquals(c.bbb(new Float(1.1)), 33);
76 assertEquals(c.bbb(new Long(1L)), 44);
77 assertEquals(c.bbb(new Double(0.01)), 55);
78 assertEquals(c.bbb(new String("")), 66);
79 }
80 // Test to ensure that the inference verifier accepts older classfiles
81 // with classes that implement interfaces with defaults.
82 void testInferenceVerifier() {
83 // interface I { int m() default { return 99; } }
84 byte I_bytes[] = {
85 (byte)0xca, (byte)0xfe, (byte)0xba, (byte)0xbe, 0x00, 0x00, 0x00, 0x34,
86 0x00, 0x08, 0x07, 0x00, 0x06, 0x07, 0x00, 0x07,
87 0x01, 0x00, 0x03, 0x66, 0x6f, 0x6f, 0x01, 0x00,
88 0x03, 0x28, 0x29, 0x49, 0x01, 0x00, 0x04, 0x43,
89 0x6f, 0x64, 0x65, 0x01, 0x00, 0x01, 0x49, 0x01,
90 0x00, 0x10, 0x6a, 0x61, 0x76, 0x61, 0x2f, 0x6c,
91 0x61, 0x6e, 0x67, 0x2f, 0x4f, 0x62, 0x6a, 0x65,
92 0x63, 0x74, 0x06, 0x00, 0x00, 0x01, 0x00, 0x02,
93 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02, 0x01,
94 0x00, 0x03, 0x00, 0x04, 0x00, 0x01, 0x00, 0x05,
95 0x00, 0x00, 0x00, 0x0f, 0x00, 0x01, 0x00, 0x01,
96 0x00, 0x00, 0x00, 0x03, 0x10, 0x63, (byte)0xac, 0x00,
97 0x00, 0x00, 0x00, 0x00, 0x00
98 };
99 // public class C implements I {} /* -target 1.5 */
100 byte C_bytes[] = {
101 (byte)0xca, (byte)0xfe, (byte)0xba, (byte)0xbe, 0x00, 0x00, 0x00, 0x31,
102 0x00, 0x0c, 0x0a, 0x00, 0x03, 0x00, 0x08, 0x07,
103 0x00, 0x09, 0x07, 0x00, 0x0a, 0x07, 0x00, 0x0b,
104 0x01, 0x00, 0x06, 0x3c, 0x69, 0x6e, 0x69, 0x74,
105 0x3e, 0x01, 0x00, 0x03, 0x28, 0x29, 0x56, 0x01,
106 0x00, 0x04, 0x43, 0x6f, 0x64, 0x65, 0x0c, 0x00,
107 0x05, 0x00, 0x06, 0x01, 0x00, 0x01, 0x43, 0x01,
108 0x00, 0x10, 0x6a, 0x61, 0x76, 0x61, 0x2f, 0x6c,
109 0x61, 0x6e, 0x67, 0x2f, 0x4f, 0x62, 0x6a, 0x65,
110 0x63, 0x74, 0x01, 0x00, 0x01, 0x49, 0x00, 0x21,
111 0x00, 0x02, 0x00, 0x03, 0x00, 0x01, 0x00, 0x04,
112 0x00, 0x00, 0x00, 0x01, 0x00, 0x01, 0x00, 0x05,
113 0x00, 0x06, 0x00, 0x01, 0x00, 0x07, 0x00, 0x00,
114 0x00, 0x11, 0x00, 0x01, 0x00, 0x01, 0x00, 0x00,
115 0x00, 0x05, 0x2a, (byte)0xb7, 0x00, 0x01, (byte)0xb1, 0x00,
116 0x00, 0x00, 0x00, 0x00, 0x00
117 };
118
119 ClassLoader cl = new ClassLoader() {
120 protected Class<?> findClass(String name) {
121 if (name.equals("I")) {
122 return defineClass("I", I_bytes, 0, I_bytes.length);
123 } else if (name.equals("C")) {
124 return defineClass("C", C_bytes, 0, C_bytes.length);
125 } else {
126 return null;
127 }
128 }
129 };
130 try {
131 Class.forName("C", true, cl);
132 } catch (Exception e) {
133 // unmodified verifier will throw VerifyError
134 throw new RuntimeException(e);
135 }
136 }
137 void assertEquals(Object o1, Object o2) {
138 System.out.print("Expected: " + o1);
139 System.out.println(", Obtained: " + o2);
140 if (!o1.equals(o2)) {
141 throw new RuntimeException("got unexpected values");
142 }
143 }
144 }