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
24package vm;
25
26import java.util.ArrayList;
27import java.util.Arrays;
28import java.util.List;
29import org.testng.annotations.Test;
30
31import static org.testng.Assert.*;
32
33/**
34 * This set of classes/interfaces (K/I/C) is specially designed to expose a
35 * bug in the JVM where it did not find some overloaded methods in some
36 * specific situations. (fixed by hotspot changeset ffb9316fd9ed)
37 */
38interface K {
39    int bbb(Long l);
40}
41
42interface I extends K {
43    default void aaa() {}
44    default void aab() {}
45    default void aac() {}
46
47    default int bbb(Integer i) { return 22; }
48    default int bbb(Float f) { return 33; }
49    default int bbb(Long l) { return 44; }
50    default int bbb(Double d) { return 55; }
51    default int bbb(String s) { return 66; }
52
53    default void caa() {}
54    default void cab() {}
55    default void cac() {}
56}
57
58class C implements I {}
59
60public class DefaultMethodRegressionTests {
61
62    @Test(groups = "vm")
63    public void testLostOverloadedMethod() {
64        C c = new C();
65        assertEquals(c.bbb(new Integer(1)), 22);
66        assertEquals(c.bbb(new Float(1.1)), 33);
67        assertEquals(c.bbb(new Long(1L)), 44);
68        assertEquals(c.bbb(new Double(0.01)), 55);
69        assertEquals(c.bbb(new String("")), 66);
70    }
71
72    // Test to ensure that the inference verifier accepts older classfiles
73    // with classes that implement interfaces with defaults.
74    @Test(groups = "vm")
75    public void testInferenceVerifier() {
76        // interface I { int m() default { return 99; } }
77        byte I_bytes[] = {
78            (byte)0xca, (byte)0xfe, (byte)0xba, (byte)0xbe, 0x00, 0x00, 0x00, 0x34,
79            0x00, 0x08, 0x07, 0x00, 0x06, 0x07, 0x00, 0x07,
80            0x01, 0x00, 0x03, 0x66, 0x6f, 0x6f, 0x01, 0x00,
81            0x03, 0x28, 0x29, 0x49, 0x01, 0x00, 0x04, 0x43,
82            0x6f, 0x64, 0x65, 0x01, 0x00, 0x01, 0x49, 0x01,
83            0x00, 0x10, 0x6a, 0x61, 0x76, 0x61, 0x2f, 0x6c,
84            0x61, 0x6e, 0x67, 0x2f, 0x4f, 0x62, 0x6a, 0x65,
85            0x63, 0x74, 0x06, 0x00, 0x00, 0x01, 0x00, 0x02,
86            0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02, 0x01,
87            0x00, 0x03, 0x00, 0x04, 0x00, 0x01, 0x00, 0x05,
88            0x00, 0x00, 0x00, 0x0f, 0x00, 0x01, 0x00, 0x01,
89            0x00, 0x00, 0x00, 0x03, 0x10, 0x63, (byte)0xac, 0x00,
90            0x00, 0x00, 0x00, 0x00, 0x00
91        };
92        // public class C implements I {}  /* -target 1.5 */
93        byte C_bytes[] = {
94            (byte)0xca, (byte)0xfe, (byte)0xba, (byte)0xbe, 0x00, 0x00, 0x00, 0x31,
95            0x00, 0x0c, 0x0a, 0x00, 0x03, 0x00, 0x08, 0x07,
96            0x00, 0x09, 0x07, 0x00, 0x0a, 0x07, 0x00, 0x0b,
97            0x01, 0x00, 0x06, 0x3c, 0x69, 0x6e, 0x69, 0x74,
98            0x3e, 0x01, 0x00, 0x03, 0x28, 0x29, 0x56, 0x01,
99            0x00, 0x04, 0x43, 0x6f, 0x64, 0x65, 0x0c, 0x00,
100            0x05, 0x00, 0x06, 0x01, 0x00, 0x01, 0x43, 0x01,
101            0x00, 0x10, 0x6a, 0x61, 0x76, 0x61, 0x2f, 0x6c,
102            0x61, 0x6e, 0x67, 0x2f, 0x4f, 0x62, 0x6a, 0x65,
103            0x63, 0x74, 0x01, 0x00, 0x01, 0x49, 0x00, 0x21,
104            0x00, 0x02, 0x00, 0x03, 0x00, 0x01, 0x00, 0x04,
105            0x00, 0x00, 0x00, 0x01, 0x00, 0x01, 0x00, 0x05,
106            0x00, 0x06, 0x00, 0x01, 0x00, 0x07, 0x00, 0x00,
107            0x00, 0x11, 0x00, 0x01, 0x00, 0x01, 0x00, 0x00,
108            0x00, 0x05, 0x2a, (byte)0xb7, 0x00, 0x01, (byte)0xb1, 0x00,
109            0x00, 0x00, 0x00, 0x00, 0x00
110        };
111
112        ClassLoader cl = new ClassLoader() {
113            protected Class<?> findClass(String name) {
114                if (name.equals("I")) {
115                    return defineClass("I", I_bytes, 0, I_bytes.length);
116                } else if (name.equals("C")) {
117                    return defineClass("C", C_bytes, 0, C_bytes.length);
118                } else {
119                    return null;
120                }
121            }
122        };
123        try {
124            Class.forName("C", true, cl);
125        } catch (Exception e) {
126            // unmodified verifier will throw VerifyError
127            fail("No exception should be thrown");
128        }
129    }
130}
131