DefaultMethodRegressionTests.java revision 7879:bc3cafb17c09 
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
33import java.util.ArrayList;
34import java.util.Arrays;
35import 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 */
42interface K {
43    int bbb(Long l);
44}
45
46interface 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
62class C implements I {}
63
64public 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}
147