Sat, 22 Dec 2018 13:10:38 -0800
Added tag jdk8u202-b25 for changeset 15d8c732039b
1 /*
2 * Copyright (c) 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 */
24 /*
25 * @test
26 * @bug 5053846 8011432
27 * @summary javac: MethodRef entries are duplicated in the constant pool
28 * @summary javac, compiler regression iterable + captured type
29 */
31 import java.io.PrintWriter;
32 import java.io.StringWriter;
33 import java.nio.file.Paths;
34 import java.util.*;
36 public class MethodRefDupInConstantPoolTest {
38 private static final String methodToLookFor =
39 "java/util/Vector.iterator:()Ljava/util/Iterator;";
41 public static void main(String[] args) {
42 new MethodRefDupInConstantPoolTest().run();
43 }
45 void run() {
46 check("-v", Paths.get(System.getProperty("test.classes"),
47 this.getClass().getSimpleName() + "$TestHelper1.class").toString());
48 check("-v", Paths.get(System.getProperty("test.classes"),
49 this.getClass().getSimpleName() + "$TestHelper2.class").toString());
50 check("-v", Paths.get(System.getProperty("test.classes"),
51 this.getClass().getSimpleName() + "$TestHelper3.class").toString());
52 check("-v", Paths.get(System.getProperty("test.classes"),
53 this.getClass().getSimpleName() + "$TestHelper4.class").toString());
54 }
56 void check(String... params) {
57 StringWriter s;
58 String out;
59 try (PrintWriter pw = new PrintWriter(s = new StringWriter())) {
60 com.sun.tools.javap.Main.run(params, pw);
61 out = s.toString();
62 }
63 String constantPool = getConstantPool(out);
64 if (constantPool.indexOf(methodToLookFor) !=
65 constantPool.lastIndexOf(methodToLookFor)) {
66 throw new AssertionError("There is more than one entry for the method seek " +
67 methodToLookFor);
68 }
69 }
71 String getConstantPool(String out) {
72 int start = out.indexOf("Constant pool:");
73 int end = out.indexOf("{");
74 return out.substring(start, end);
75 }
77 class TestHelper1 {
78 void m() {
79 Vector v = new Vector();
80 Iterator iter = v.iterator();
81 while (iter.hasNext()) {
82 Object o = iter.next();
83 Object o2 = o;
84 }
85 for (Object o: v) {
86 Object o2 = o;
87 }
88 }
89 }
91 class TestHelper2<X extends Number & Iterable<String>> {
92 void test(X x) {
93 for (String s : x) { }
94 }
95 }
97 interface Data extends Iterable<String> {}
99 class TestHelper3<X extends Number & Iterable<? extends Data>> {
100 void test(X x) {
101 for (Data s : x) { }
102 }
103 }
105 class TestHelper4 {
106 void test(Iterable<? extends Data> t) {
107 for(Object a: t.iterator().next());
108 }
109 }
110 }