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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/StringBuilder/StringBufferRepeat.java Normal file
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/*
* Copyright (c) 2023, 2024, 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.
*/
import org.testng.annotations.Test;
import static org.testng.Assert.assertEquals;
import java.util.Arrays;
/**
* @test
* @bug 8302323 8322512
* @summary Test StringBuffer.repeat sanity tests
* @run testng/othervm -XX:-CompactStrings StringBufferRepeat
* @run testng/othervm -XX:+CompactStrings StringBufferRepeat
*/
@Test
public class StringBufferRepeat {
private static class MyChars implements CharSequence {
private static final char[] DATA = new char[] { 'a', 'b', 'c' };
@Override
public int length() {
return DATA.length;
}
@Override
public char charAt(int index) {
return DATA[index];
}
@Override
public CharSequence subSequence(int start, int end) {
return new String(Arrays.copyOfRange(DATA, start, end));
}
}
private static final MyChars MYCHARS = new MyChars();
public void sanity() {
StringBuffer sb = new StringBuffer();
// prime the StringBuffer
sb.append("repeat");
// single character Latin1
sb.repeat('1', 0);
sb.repeat('2', 1);
sb.repeat('3', 5);
// single string Latin1 (optimized)
sb.repeat("1", 0);
sb.repeat("2", 1);
sb.repeat("3", 5);
// multi string Latin1
sb.repeat("-1", 0);
sb.repeat("-2", 1);
sb.repeat("-3", 5);
// single character UTF16
sb.repeat('\u2460', 0);
sb.repeat('\u2461', 1);
sb.repeat('\u2462', 5);
// single string UTF16 (optimized)
sb.repeat("\u2460", 0);
sb.repeat("\u2461", 1);
sb.repeat("\u2462", 5);
// multi string UTF16
sb.repeat("-\u2460", 0);
sb.repeat("-\u2461", 1);
sb.repeat("-\u2462", 5);
// CharSequence
sb.repeat(MYCHARS, 3);
// null
sb.repeat((String)null, 0);
sb.repeat((String)null, 1);
sb.repeat((String)null, 5);
sb.repeat((CharSequence)null, 0);
sb.repeat((CharSequence)null, 1);
sb.repeat((CharSequence)null, 5);
String expected = "repeat233333233333-2-3-3-3-3-3\u2461\u2462\u2462\u2462\u2462\u2462\u2461\u2462\u2462\u2462\u2462\u2462-\u2461-\u2462-\u2462-\u2462-\u2462-\u2462abcabcabc" +
"nullnullnullnullnullnullnullnullnullnullnullnull";
assertEquals(expected, sb.toString());
// Codepoints
sb.setLength(0);
sb.repeat(0, 0);
sb.repeat(0, 1);
sb.repeat(0, 5);
sb.repeat((int)' ', 0);
sb.repeat((int)' ', 1);
sb.repeat((int)' ', 5);
sb.repeat(0x2460, 0);
sb.repeat(0x2461, 1);
sb.repeat(0x2462, 5);
sb.repeat(0x10FFFF, 0);
sb.repeat(0x10FFFF, 1);
sb.repeat(0x10FFFF, 5);
expected = "\u0000\u0000\u0000\u0000\u0000\u0000\u0020\u0020\u0020\u0020\u0020\u0020\u2461\u2462\u2462\u2462\u2462\u2462\udbff\udfff\udbff\udfff\udbff\udfff\udbff\udfff\udbff\udfff\udbff\udfff";
assertEquals(expected, sb.toString());
// toStringCache
sb.setLength(0);
sb.toString();
sb.repeat('*', 5);
expected = "*****";
assertEquals(sb.toString(), expected);
sb.setLength(0);
sb.toString();
sb.repeat("*", 5);
assertEquals(sb.toString(), expected);
}
public void exceptions() {
StringBuffer sb = new StringBuffer();
try {
sb.repeat(' ', Integer.MAX_VALUE);
throw new RuntimeException("No OutOfMemoryError thrown");
} catch (OutOfMemoryError | IndexOutOfBoundsException ex) {
// Okay
}
try {
sb.repeat(" ", Integer.MAX_VALUE);
throw new RuntimeException("No OutOfMemoryError thrown");
} catch (OutOfMemoryError | IndexOutOfBoundsException ex) {
// Okay
}
try {
sb.repeat(MYCHARS, Integer.MAX_VALUE);
throw new RuntimeException("No OutOfMemoryError thrown");
} catch (OutOfMemoryError | IndexOutOfBoundsException ex) {
// Okay
}
try {
sb.repeat(' ', -1);
throw new RuntimeException("No IllegalArgumentException thrown");
} catch (IllegalArgumentException ex) {
// Okay
}
try {
sb.repeat("abc", -1);
throw new RuntimeException("No IllegalArgumentException thrown");
} catch (IllegalArgumentException ex) {
// Okay
}
try {
sb.repeat(MYCHARS, -1);
throw new RuntimeException("No IllegalArgumentException thrown");
} catch (IllegalArgumentException ex) {
// Okay
}
try {
sb.repeat(0x10FFFF + 1, -1);
throw new RuntimeException("No IllegalArgumentException thrown");
} catch (IllegalArgumentException ex) {
// Okay
}
try {
sb.repeat(-1, -1);
throw new RuntimeException("No IllegalArgumentException thrown");
} catch (IllegalArgumentException ex) {
// Okay
}
}
}