| /* |
| * Copyright (c) 2013, 2016, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * @test |
| * @bug 5053846 8011432 |
| * @summary javac: MethodRef entries are duplicated in the constant pool |
| * @summary javac, compiler regression iterable + captured type |
| * @modules jdk.compiler |
| * jdk.jdeps/com.sun.tools.javap |
| */ |
| |
| import java.io.PrintWriter; |
| import java.io.StringWriter; |
| import java.nio.file.Paths; |
| import java.util.*; |
| |
| public class MethodRefDupInConstantPoolTest { |
| |
| private static final String methodToLookFor = |
| "java/util/Vector.iterator:()Ljava/util/Iterator;"; |
| |
| public static void main(String[] args) { |
| new MethodRefDupInConstantPoolTest().run(); |
| } |
| |
| void run() { |
| check("-v", Paths.get(System.getProperty("test.classes"), |
| this.getClass().getSimpleName() + "$TestHelper1.class").toString()); |
| check("-v", Paths.get(System.getProperty("test.classes"), |
| this.getClass().getSimpleName() + "$TestHelper2.class").toString()); |
| check("-v", Paths.get(System.getProperty("test.classes"), |
| this.getClass().getSimpleName() + "$TestHelper3.class").toString()); |
| check("-v", Paths.get(System.getProperty("test.classes"), |
| this.getClass().getSimpleName() + "$TestHelper4.class").toString()); |
| } |
| |
| void check(String... params) { |
| StringWriter s; |
| String out; |
| try (PrintWriter pw = new PrintWriter(s = new StringWriter())) { |
| com.sun.tools.javap.Main.run(params, pw); |
| out = s.toString(); |
| } |
| String constantPool = getConstantPool(out); |
| if (constantPool.indexOf(methodToLookFor) != |
| constantPool.lastIndexOf(methodToLookFor)) { |
| throw new AssertionError("There is more than one entry for the method seek " + |
| methodToLookFor); |
| } |
| } |
| |
| String getConstantPool(String out) { |
| int start = out.indexOf("Constant pool:"); |
| int end = out.indexOf("{"); |
| return out.substring(start, end); |
| } |
| |
| class TestHelper1 { |
| void m() { |
| Vector v = new Vector(); |
| Iterator iter = v.iterator(); |
| while (iter.hasNext()) { |
| Object o = iter.next(); |
| Object o2 = o; |
| } |
| for (Object o: v) { |
| Object o2 = o; |
| } |
| } |
| } |
| |
| class TestHelper2<X extends Number & Iterable<String>> { |
| void test(X x) { |
| for (String s : x) { } |
| } |
| } |
| |
| interface Data extends Iterable<String> {} |
| |
| class TestHelper3<X extends Number & Iterable<? extends Data>> { |
| void test(X x) { |
| for (Data s : x) { } |
| } |
| } |
| |
| class TestHelper4 { |
| void test(Iterable<? extends Data> t) { |
| for(Object a: t.iterator().next()); |
| } |
| } |
| } |