jdk8-mips64-public/langtools: test/tools/javac/T5053846/MethodRefDupInConstantPoolTest.java@fa24eba012bd

5053846: javac: MethodRef entries are duplicated in the constant pool
Reviewed-by: mcimadamore

     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

    27  * @summary javac: MethodRef entries are duplicated in the constant pool

    28  */

    30 import java.io.PrintWriter;

    31 import java.io.StringWriter;

    32 import java.nio.file.Paths;

    33 import java.util.*;

    35 public class MethodRefDupInConstantPoolTest {

    37     private static final String methodToLookFor =

    38             "java/util/Vector.iterator:()Ljava/util/Iterator;";

    40     public static void main(String[] args) {

    41         new MethodRefDupInConstantPoolTest().run();

    42     }

    44     void run() {

    45         check("-v", Paths.get(System.getProperty("test.classes"),

    46                 "TestHelper1.class").toString());

    47         check("-v", Paths.get(System.getProperty("test.classes"),

    48                 "TestHelper2.class").toString());

    49     }

    51     void check(String... params) {

    52         StringWriter s;

    53         String out;

    54         try (PrintWriter pw = new PrintWriter(s = new StringWriter())) {

    55             com.sun.tools.javap.Main.run(params, pw);

    56             out = s.toString();

    57         }

    58         String constantPool = getConstantPool(out);

    59         if (constantPool.indexOf(methodToLookFor) !=

    60                 constantPool.lastIndexOf(methodToLookFor)) {

    61             throw new AssertionError("There is more than one entry for the method seek "  +

    62                     methodToLookFor);

    63         }

    64     }

    66     String getConstantPool(String out) {

    67         int start = out.indexOf("Constant pool:");

    68         int end = out.indexOf("{");

    69         return out.substring(start, end);

    70     }

    71 }

    73 class TestHelper1 {

    74     void m() {

    75         Vector v = new Vector();

    76         Iterator iter = v.iterator();

    77         while (iter.hasNext()) {

    78             Object o = iter.next();

    79             Object o2 = o;

    80         }

    81         for (Object o: v) {

    82             Object o2 = o;

    83         }

    84     }

    85 }

    87 class TestHelper2<X extends Number & Iterable<String>> {

    88     void test(X x) {

    89         for (String s : x) { }

    90     }

    91 }

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