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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
commit 0a580b313d
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test/jdk/java/io/charStreams/SmallReads.java Normal file
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/*
* Copyright (c) 1997, 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
@summary Check that BufferedReader/Writer correctly handle small reads
*/
import java.io.*;
public class SmallReads {
static class OneByteInputStream extends FilterInputStream {
OneByteInputStream(InputStream in) {
super(in);
}
public int read(byte[] b, int off, int len) throws IOException {
return in.read(b, off, 1);
}
}
static String enc = "UTF8";
static String inEnc;
static String outEnc;
static int count = 100;
public static void main(String[] args) throws Exception {
PrintWriter log
= new PrintWriter(new OutputStreamWriter(System.err), true);
if (inEnc == null)
inEnc = enc;
if (outEnc == null)
outEnc = enc;
PipedOutputStream uo = new PipedOutputStream();
PipedInputStream ui = new PipedInputStream(uo);
PipedOutputStream co = new PipedOutputStream();
PipedInputStream ci = new PipedInputStream(co);
InputStream ci2 = new OneByteInputStream(ci);
BufferedWriter w = new BufferedWriter(new OutputStreamWriter(co, outEnc));
BufferedReader r = new BufferedReader(new InputStreamReader(ci2, inEnc));
Thread t1 = new Thread(new RandomLineSource(uo, w, count, log));
Thread t2 = new Thread(new LineSink(ui, r, count, log));
t1.start();
t2.start();
t1.join();
t2.join();
}
}