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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/jdk/java/io/PrintStream/WriteBytes.java Normal file
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/*
* Copyright (c) 2019, 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 8187898
* @summary Test of writeBytes(byte[])
*/
import java.io.BufferedOutputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintStream;
import java.util.Arrays;
public class WriteBytes {
public static void main(String[] args) throws Exception {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
OutputStream out = new BufferedOutputStream(baos, 512);
PrintStream ps = new PrintStream(out, false);
byte[] buf = new byte[128];
for (int i = 0; i < buf.length; i++) {
buf[i] = (byte)i;
}
ps.writeBytes(buf);
assertTrue(baos.size() == 0, "Buffer should not have been flushed");
ps.close();
assertTrue(baos.size() == buf.length, "Stream size " + baos.size() +
" but expected " + buf.length);
ps = new PrintStream(out, true);
ps.writeBytes(buf);
assertTrue(baos.size() == 2*buf.length, "Stream size " + baos.size() +
" but expected " + 2*buf.length);
byte[] arr = baos.toByteArray();
assertTrue(arr.length == 2*buf.length, "Array length " + arr.length +
" but expected " + 2*buf.length);
assertTrue(Arrays.equals(buf, 0, buf.length, arr, 0, buf.length),
"First write not equal");
assertTrue(Arrays.equals(buf, 0, buf.length, arr, buf.length,
2*buf.length), "Second write not equal");
ps.close();
ps.writeBytes(buf);
assertTrue(ps.checkError(), "Error condition should be true");
}
private static void assertTrue(boolean condition, String msg) {
if (!condition)
throw new RuntimeException(msg);
}
}