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

Browse source 
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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311
test/jdk/java/lang/StringBuffer/ToStringCache.java Normal file
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/*
* Copyright (c) 2013, 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 8013395 8014814
* @summary Test StringBuffer.toString caching
*/
public class ToStringCache {
// we can't test that we actually use a cached value (the benchmarks
// verify that) but we have to test that the cache is cleared when
// expected
public static void main(String[] args) throws Exception {
String original = "The original String";
StringBuffer sb = new StringBuffer(original);
String a = sb.toString();
checkEqual(a, original);
String b = sb.toString();
checkEqual(a, b);
// mutating methods
sb.setLength(12);
b = sb.toString();
checkUnequal(a, b);
a = b;
sb.setCharAt(0, 'X');
b = sb.toString();
checkUnequal(a, b);
a = b;
sb.append(new Character('X'));
b = sb.toString();
checkUnequal(a, b);
a = b;
sb.append("More text");
b = sb.toString();
checkUnequal(a, b);
a = b;
sb.append(sb);
b = sb.toString();
checkUnequal(a, b);
a = b;
sb.append(new StringBuilder("Build"));
b = sb.toString();
checkUnequal(a, b);
a = b;
sb.append(new StringBuilder("Build2"), 0, 1);
b = sb.toString();
checkUnequal(a, b);
a = b;
sb.append(new char[] { 'a', 'b' });
b = sb.toString();
checkUnequal(a, b);
a = b;
sb.append(true);
b = sb.toString();
checkUnequal(a, b);
a = b;
sb.append('c');
b = sb.toString();
checkUnequal(a, b);
a = b;
sb.append(23);
b = sb.toString();
checkUnequal(a, b);
a = b;
sb.appendCodePoint(Character.codePointAt(new char[] { 'X'}, 0));
b = sb.toString();
checkUnequal(a, b);
a = b;
sb.append(1L);
b = sb.toString();
checkUnequal(a, b);
a = b;
sb.append(1.0f);
b = sb.toString();
checkUnequal(a, b);
a = b;
sb.append(1.0d);
b = sb.toString();
checkUnequal(a, b);
a = b;
sb.delete(0, 5);
b = sb.toString();
checkUnequal(a, b);
a = b;
sb.deleteCharAt(0);
b = sb.toString();
checkUnequal(a, b);
a = b;
sb.replace(0,2, "123");
b = sb.toString();
checkUnequal(a, b);
a = b;
sb.insert(0, new char[] { 'a', 'b', 'c'}, 0, 3);
b = sb.toString();
checkUnequal(a, b);
a = b;
sb.insert(0, new Object());
b = sb.toString();
checkUnequal(a, b);
a = b;
sb.insert(0, "abc");
b = sb.toString();
checkUnequal(a, b);
a = b;
sb.insert(0, new char[] { 'a', 'b', 'c' });
b = sb.toString();
checkUnequal(a, b);
a = b;
sb.insert(0, new StringBuilder("Build"));
b = sb.toString();
checkUnequal(a, b);
a = b;
sb.insert(0, new StringBuilder("Build"), 0, 1);
b = sb.toString();
checkUnequal(a, b);
a = b;
sb.insert(0, false);
b = sb.toString();
checkUnequal(a, b);
a = b;
sb.insert(0, 'X');
b = sb.toString();
checkUnequal(a, b);
a = b;
sb.insert(0, 1);
b = sb.toString();
checkUnequal(a, b);
a = b;
sb.insert(0, 1L);
b = sb.toString();
checkUnequal(a, b);
a = b;
sb.insert(0, 1.0f);
b = sb.toString();
checkUnequal(a, b);
a = b;
sb.insert(0, 1.0d);
b = sb.toString();
checkUnequal(a, b);
a = b;
sb.reverse();
b = sb.toString();
checkUnequal(a, b);
// Extra checks that append(null) works correctly
sb.append((String)null);
b = sb.toString();
checkUnequal(a, b);
a = b;
sb.append((StringBuffer)null);
b = sb.toString();
checkUnequal(a, b);
a = b;
sb.append((StringBuilder)null);
b = sb.toString();
checkUnequal(a, b);
a = b;
sb.append((CharSequence)null);
b = sb.toString();
checkUnequal(a, b);
a = b;
// non-mutating methods
// Reset to known value
sb = new StringBuffer(original);
a = sb.toString();
b = sb.toString();
checkEqual(a, b);
int l = sb.length();
b = sb.toString();
checkEqual(a, b);
int cap = sb.capacity();
b = sb.toString();
checkEqual(a, b);
sb.ensureCapacity(100);
b = sb.toString();
checkEqual(a, b);
sb.trimToSize();
b = sb.toString();
checkEqual(a, b);
char c = sb.charAt(1);
b = sb.toString();
checkEqual(a, b);
int cp = sb.codePointAt(1);
b = sb.toString();
checkEqual(a, b);
cp = sb.codePointBefore(2);
b = sb.toString();
checkEqual(a, b);
int count = sb.codePointCount(0,1);
b = sb.toString();
checkEqual(a, b);
count = sb.offsetByCodePoints(0, 1);
b = sb.toString();
checkEqual(a, b);
sb.getChars(0, 1, new char[2], 0);
b = sb.toString();
checkEqual(a, b);
String sub = sb.substring(0);
b = sb.toString();
checkEqual(a, b);
CharSequence cs = sb.subSequence(0,1);
b = sb.toString();
checkEqual(a, b);
sub = sb.substring(0, 3);
b = sb.toString();
checkEqual(a, b);
int index = sb.indexOf("rig");
b = sb.toString();
checkEqual(a, b);
index = sb.indexOf("rig", 2);
b = sb.toString();
checkEqual(a, b);
index = sb.lastIndexOf("rig");
b = sb.toString();
checkEqual(a, b);
index = sb.lastIndexOf("rig", 3);
b = sb.toString();
checkEqual(a, b);
}
private static void checkEqual(String s1, String s2) {
if (!s1.equals(s2))
throw new RuntimeException("Unmatched strings: s1 = "
+ s1 + " s2 = " + s2);
}
private static void checkUnequal(String s1, String s2) {
if (s1.equals(s2))
throw new RuntimeException("Unexpected matched strings: " + s1);
}
}