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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/ArrayCopyAligned.java Normal file
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/*
* Copyright (c) 2014, 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.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.concurrent.TimeUnit;
/**
* Benchmark measuring aligned System.arraycopy.
*/
@BenchmarkMode(Mode.AverageTime)
@OutputTimeUnit(TimeUnit.NANOSECONDS)
@State(Scope.Thread)
@Warmup(iterations = 10, time = 1)
@Measurement(iterations = 5, time = 1)
@Fork(value = 3)
public class ArrayCopyAligned {
@Param({"1", "3", "5", "10", "20", "70", "150", "300", "600", "1200"})
int length;
int fromPos, toPos;
byte[] fromByteArr, toByteArr;
char[] fromCharArr, toCharArr;
int[] fromIntArr, toIntArr;
long[] fromLongArr, toLongArr;
@Setup
public void setup() {
// Both positions aligned
fromPos = 8;
toPos = 8;
fromByteArr = new byte[1210];
toByteArr = new byte[1210];
fromCharArr = new char[1210];
toCharArr = new char[1210];
fromIntArr = new int[1210];
toIntArr = new int[1210];
fromLongArr = new long[1210];
toLongArr = new long[1210];
}
@Benchmark
public void testByte() {
System.arraycopy(fromByteArr, fromPos, toByteArr, toPos, length);
}
@Benchmark
public void testChar() {
System.arraycopy(fromCharArr, fromPos, toCharArr, toPos, length);
}
@Benchmark
public void testInt() {
System.arraycopy(fromIntArr, fromPos, toIntArr, toPos, length);
}
@Benchmark
public void testLong() {
System.arraycopy(fromLongArr, fromPos, toLongArr, toPos, length);
}
}