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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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84
test/jdk/java/nio/MappedByteBuffer/Basic.java Normal file
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/*
* Copyright (c) 2001, 2010, 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 4462336 6799037
* @summary Simple MappedByteBuffer tests
*/
import java.io.*;
import java.nio.*;
import java.nio.channels.*;
public class Basic {
public static void main(String[] args) throws Exception {
byte[] srcData = new byte[20];
for (int i=0; i<20; i++)
srcData[i] = 3;
File blah = File.createTempFile("blah", null);
blah.deleteOnExit();
FileOutputStream fos = new FileOutputStream(blah);
FileChannel fc = fos.getChannel();
fc.write(ByteBuffer.wrap(srcData));
fc.close();
fos.close();
FileInputStream fis = new FileInputStream(blah);
fc = fis.getChannel();
MappedByteBuffer mbb = fc.map(FileChannel.MapMode.READ_ONLY, 0, 10);
mbb.load();
mbb.isLoaded();
mbb.force();
if (!mbb.isReadOnly())
throw new RuntimeException("Incorrect isReadOnly");
// repeat with unaligned position in file
mbb = fc.map(FileChannel.MapMode.READ_ONLY, 1, 10);
mbb.load();
mbb.isLoaded();
mbb.force();
fc.close();
fis.close();
RandomAccessFile raf = new RandomAccessFile(blah, "r");
fc = raf.getChannel();
mbb = fc.map(FileChannel.MapMode.READ_ONLY, 0, 10);
if (!mbb.isReadOnly())
throw new RuntimeException("Incorrect isReadOnly");
fc.close();
raf.close();
raf = new RandomAccessFile(blah, "rw");
fc = raf.getChannel();
mbb = fc.map(FileChannel.MapMode.READ_WRITE, 0, 10);
if (mbb.isReadOnly())
throw new RuntimeException("Incorrect isReadOnly");
fc.close();
raf.close();
// clean-up
mbb = null;
System.gc();
Thread.sleep(500);
}
}