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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/jdk/java/lang/StringBuffer/AppendStringBuilder.java Normal file
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/*
* Copyright (c) 2012, 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 6206780
* @summary Test StringBuffer.append(StringBuilder);
* @key randomness
*/
import java.util.Random;
public class AppendStringBuilder {
private static Random generator = new Random();
public static void main(String[] args) throws Exception {
for (int i=0; i<1000; i++) {
StringBuilder sb1 = generateTestBuilder(10, 100);
StringBuilder sb2 = generateTestBuilder(10, 100);
StringBuilder sb3 = generateTestBuilder(10, 100);
String s1 = sb1.toString();
String s2 = sb2.toString();
String s3 = sb3.toString();
String concatResult = new String(s1+s2+s3);
StringBuffer test = new StringBuffer();
test.append(sb1);
test.append(sb2);
test.append(sb3);
if (!test.toString().equals(concatResult))
throw new RuntimeException("StringBuffer.append failure");
}
}
private static int getRandomIndex(int constraint1, int constraint2) {
int range = constraint2 - constraint1;
int x = generator.nextInt(range);
return constraint1 + x;
}
private static StringBuilder generateTestBuilder(int min, int max) {
StringBuilder aNewStringBuilder = new StringBuilder(120);
int aNewLength = getRandomIndex(min, max);
for(int y=0; y<aNewLength; y++) {
int achar = generator.nextInt(30)+30;
char test = (char)(achar);
aNewStringBuilder.append(test);
}
return aNewStringBuilder;
}
}