65 lines
2.4 KiB
Java
65 lines
2.4 KiB
Java
/*
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* Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 8015927
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* @summary Class reference duplicates in constant pool
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* @modules jdk.jdeps/com.sun.tools.classfile
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* @clean ClassRefDupInConstantPoolTest$Duplicates.class
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* @run main ClassRefDupInConstantPoolTest
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*/
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import java.util.TreeSet;
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import com.sun.tools.classfile.*;
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import com.sun.tools.classfile.ConstantPool.*;
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public class ClassRefDupInConstantPoolTest {
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public static void main(String[] args) throws Exception {
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ClassFile cls = ClassFile.read(ClassRefDupInConstantPoolTest.class.
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getResourceAsStream("ClassRefDupInConstantPoolTest$Duplicates.class"));
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ConstantPool pool = cls.constant_pool;
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int duplicates = 0;
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TreeSet<Integer> set = new TreeSet<>();
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for (CPInfo i : pool.entries()) {
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if (i.getTag() == ConstantPool.CONSTANT_Class) {
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CONSTANT_Class_info ci = (CONSTANT_Class_info)i;
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if (!set.add(ci.name_index)) {
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duplicates++;
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System.out.println("DUPLICATE CLASS REF " + ci.getName());
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}
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}
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}
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if (duplicates > 0)
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throw new Exception("Test Failed");
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}
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class Duplicates {
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String concat(String s1, String s2) {
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return s1 + (s2 == s1 ? " " : s2);
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}
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}
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}
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