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8015927: Class reference duplicates in constant pool

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Reviewed-by: jjg
This commit is contained in:
Paul Govereau 2014-05-16 17:08:42 -04:00
parent 31e6340f54
commit c212c43f70
3 changed files with 74 additions and 3 deletions
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63
langtools/test/tools/javac/jvm/ClassRefDupInConstantPoolTest.java Normal file
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/*
* Copyright (c) 2014, 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 8015927
* @summary Class reference duplicates in constant pool
* @clean ClassRefDupInConstantPoolTest$Duplicates.class
* @run main ClassRefDupInConstantPoolTest
*/
import java.util.TreeSet;
import com.sun.tools.classfile.*;
import com.sun.tools.classfile.ConstantPool.*;
public class ClassRefDupInConstantPoolTest {
public static void main(String[] args) throws Exception {
ClassFile cls = ClassFile.read(ClassRefDupInConstantPoolTest.class.
getResourceAsStream("ClassRefDupInConstantPoolTest$Duplicates.class"));
ConstantPool pool = cls.constant_pool;
int duplicates = 0;
TreeSet<Integer> set = new TreeSet<>();
for (CPInfo i : pool.entries()) {
if (i.getTag() == ConstantPool.CONSTANT_Class) {
CONSTANT_Class_info ci = (CONSTANT_Class_info)i;
if (!set.add(ci.name_index)) {
duplicates++;
System.out.println("DUPLICATE CLASS REF " + ci.getName());
}
}
}
if (duplicates > 0)
throw new Exception("Test Failed");
}
class Duplicates {
String concat(String s1, String s2) {
return s1 + (s2 == s1 ? " " : s2);
}
}
}