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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.
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russell@unturf.com 2026-03-26 17:11:57 -04:00
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test/micro/org/openjdk/bench/java/lang/Characters.java Normal file
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/*
* Copyright (c) 2018, 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.
*/
package org.openjdk.bench.java.lang;
import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.Fork;
import org.openjdk.jmh.annotations.Level;
import org.openjdk.jmh.annotations.Measurement;
import org.openjdk.jmh.annotations.Mode;
import org.openjdk.jmh.annotations.OutputTimeUnit;
import org.openjdk.jmh.annotations.Param;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.Setup;
import org.openjdk.jmh.annotations.State;
import org.openjdk.jmh.annotations.Warmup;
import java.util.Random;
import java.util.concurrent.TimeUnit;
@BenchmarkMode(Mode.AverageTime)
@OutputTimeUnit(TimeUnit.NANOSECONDS)
@State(Scope.Thread)
@Warmup(iterations = 5, time = 1)
@Measurement(iterations = 5, time = 1)
@Fork(3)
public class Characters {
@Param({"9", "65", "97", "223", "430"})
private int codePoint;
@Param("500")
private int size;
private char[] chars;
private char[] res;
@Setup
public void setup() {
Random r = new Random(0);
chars = new char[size];
res = new char[size];
for (int i = 0; i < size; i++) {
chars[i] = (char)r.nextInt(Character.MAX_VALUE + 1);
}
}
@Benchmark
public void reverseBytes() {
for (int i = 0; i < size; i++) {
res[i] = Character.reverseBytes(chars[i]);
}
}
@Benchmark
public boolean isDigit() {
return Character.isDigit(codePoint);
}
@Benchmark
public boolean isLowerCase() {
return Character.isLowerCase(codePoint);
}
@Benchmark
public boolean isUpperCase() {
return Character.isUpperCase(codePoint);
}
@Benchmark
public boolean isWhitespace() {
return Character.isWhitespace(codePoint);
}
@BenchmarkMode(Mode.AverageTime)
@OutputTimeUnit(TimeUnit.NANOSECONDS)
@Warmup(iterations = 5, time = 1)
@Measurement(iterations = 5, time = 1)
@Fork(3)
public static class CodePoints {
@Benchmark
public void codePointOf() {
Character.codePointOf("Latin Capital Letter B with hook");
}
}
@BenchmarkMode(Mode.AverageTime)
@OutputTimeUnit(TimeUnit.NANOSECONDS)
@State(Scope.Thread)
@Warmup(iterations = 5, time = 1)
@Measurement(iterations = 5, time = 1)
@Fork(3)
public static class CaseConversions {
@Param({
"low", // 0x09 pre A
"A", // 0x41 uppercase A
"a", // 0x61 lowercase a
"A-grave", // 0xC0 uppercase A-grave
"a-grave", // 0xE0 lowercase a-grave
"micro", // 0xB5 lowercase 'Micro Sign'
"yD" // 0xFF lowercase 'y with Diaeresis'
})
private String codePoint;
private int cp;
@Setup(Level.Trial)
public void setup() {
cp = switch (codePoint) {
case "low" -> 0x09;
case "A" -> 0x41;
case "a" -> 0x61;
case "A-grave" -> 0xC0;
case "a-grave" -> 0xE0;
case "yD" -> 0xE0;
case "micro" -> 0xFF;
default -> Integer.parseInt(codePoint);
};
}
@Benchmark
public int toUpperCase() {
return Character.toUpperCase(cp);
}
@Benchmark
public int toLowerCase() {
return Character.toLowerCase(cp);
}
}
}