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undefect. CWE-407 — 63 sites patched across 27 ecosystems

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Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com

Patches, unit tests, benchmarks, whitepaper, and outreach briefs.
Public domain — no copyright claimed. Use freely.
This commit is contained in:
russell@unturf.com 2026-03-26 17:11:57 -04:00
commit 0a580b313d
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test/langtools/tools/javac/jvm/ClassRefDupInConstantPoolTest.java Normal file
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/*
* Copyright (c) 2014, 2025, 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 ClassRefDupInConstantPoolTest$Duplicates
* @run main ClassRefDupInConstantPoolTest
*/
import java.util.TreeSet;
import java.lang.classfile.*;
import java.lang.classfile.constantpool.*;
public class ClassRefDupInConstantPoolTest {
public static void main(String[] args) throws Exception {
ClassModel cls = ClassFile.of().parse(ClassRefDupInConstantPoolTest.class.
getResourceAsStream("ClassRefDupInConstantPoolTest$Duplicates.class").readAllBytes());
ConstantPool pool = cls.constantPool();
int duplicates = 0;
TreeSet<String> set = new TreeSet<>();
for (PoolEntry pe : pool) {
if (pe instanceof ClassEntry ce) {
if (!set.add(ce.asInternalName())) {
duplicates++;
System.out.println("DUPLICATE CLASS REF " + ce.asInternalName());
}
}
}
if (duplicates > 0)
throw new Exception("Test Failed");
}
class Duplicates {
String concat(String s1, String s2) {
return s1 + (s2 == s1 ? " " : s2);
}
}
}