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<h1>Release notes for <tt>checker-XXX</tt> builds</h1>
<h4 id="checker_263">checker-263</h4>
<p><b>built:</b> March 22, 2012</br>
<b>download:</b> <a href="http://bit.ly/GUmtVB">checker-263.tar.bz2</a></p>
<p><b>highlights:</b></p>
<ul>
<li>Fixes several serious bugs with inter-procedural analysis, including a case where retain/releases would be "double-counted".</li>
</ul>
<h4 id="checker_262">checker-262</h4>
<p><b>built: </b>March 15, 2012</br>
<b>download:</b> <a href="http://bit.ly/xETQF0">checker-262.tar.bz2</a></p>
<p><b>highlights:</b></p>
<ul>
<li>Enables experimental interprocedural analysis (within a file), which greatly amplifies the analyzer's ability to find issues.</li>
<li>Many bug fixes to the malloc/free checker.</li>
<li>Support for new Objective-C NSArray/NSDictionary/NSNumber literals syntax, and Objective-C container subscripting.</li>
</ul>
<p>NOTE: This build contains new interprocedural analysis that allows the analyzer to find more complicated bugs that span function boundaries. It may have problems, performance issues, etc. We'd like to <a href="/filing_bugs.html">hear about them</a>.
<h4 id="checker_261">checker-261</h4>
<p><b>built: </b>February 22, 2012<br>
<b>download:</b> <a href="http://bit.ly/yN1Awv">checker-261.tar.bz2</a></p>
<p><b>highlights:</b></p>
<ul>
<li>Contains a new experimental malloc/free checker.</li>
<li>Better support for projects using ARC.</li>
<li>Warns about null pointers passed as arguments to C string functions.</li>
<li>Warns about common anti-patterns in 'strncat' size argument, which can lead to buffer overflows.</li>
<li>set-xcode-analyzer now supports self-contained Xcode.app (Xcode 4.3 and later).</li>
<li>Contains a newer version of the analyzer than Xcode 4.3.</li>
<li>Misc. bug fixes and performance work.</li>
</ul>
<h4 id="checker_260">checker-260</h4>
<p><b>built: </b>January 25, 2012<br>
<b>download:</b> <a href="http://bit.ly/wpAqVP">checker-260.tar.bz2</a></p>
<p><b>highlights:</b></p>
<p>This is essentially the same as checker-259, but enables the following <i>experimental</i> checkers (please provide feedback):</p>
<ul>
<li>Warns about unsafe uses of CFArrayCreate, CFSetCreate, and CFDictionaryCreate</li>
<li>Warns about unsafe uses of getpw, gets, which are sources of buffer overflows</li>
<li>Warns about unsafe uses of mktemp and mktemps, which can lead to insecure temporary files</li>
<li>Warns about unsafe uses of vfork, which is <a href="https://www.securecoding.cert.org/confluence/display/seccode/POS33-C.+Do+not+use+vfork()">insecure</a> to use</li>
<li>Warns about not checking the return values of setuid, setgid, seteuid, setegid, setreuid, setregid (another security issue)</li>
</ul>
<h4 id="checker_259">checker-259</h4>
<p><b>built: </b>January 25, 2012<br>
<b>download:</b> <a href="http://bit.ly/zOWf1P">checker-259.tar.bz2</a></p>
<p><b>highlights:</b></p>
<ul>
<li>Contains a newer version of the analyzer than the one shipped in Xcode 4.2.</li>
<li>Significant performance optimizations to reduce memory usage of the analyzer.</li>
<li>Tweaks to scan-build to have it work more easily with Xcode projects using Clang.</li>
<li>Numerous bug fixes to better support code using ARC.</li>
</ul>
<h4 id="checker_258">checker-258</h4>
<p><b>built: </b>October 13, 2011<br>
<p><b>highlights:</b></p>
<ul>
<li>Contains a newer version of the analyzer than the one shipped in Xcode 4.2.</li>
<li>Adds a new security checker for looking at correct uses of the Mac OS KeyChain API.</li>
<li>Supports ARC (please file bugs where you see issues)</li>
<li>Major under-the-cover changes. This should result in more precise results in some cases, but this is laying the groundwork for major improvements. Please file bugs where you see regressions or issues.</li>
</ul>
<h4 id="checker_257">checker-257</h4>
<p><b>built: </b>May 25, 2011<br>
<p><b>highlights:</b></p>
<ul>
<li>The analyzer is now far more aggressive with checking conformance with Core Foundation conventions. Any function that returns a CF type must now obey the Core Foundation naming conventions, or use the <a href="/annotations.html#attr_cf_returns_retained">cf_returns_retained</a> or <a href="/annotations.html#attr_cf_returns_not_retained">cf_returns_not_retained</a> annotations.</li>
<li>Fixed a serious regression where the analyzer would not analyze Objective-C methods in class extensions.</li>
<li>Misc. bug fixes to improve analyzer precision.
</li>
</ul>
<h4 id="checker_256">checker-256</h4>
<p><b>built: </b>April 13, 2011<br>
<p><b>highlights:</b></p>
<ul>
<li>Lots of bug fixes and improvements to analyzer precision (fewer false positives, possibly more bugs found).
<li>Introductory analysis support for C++ and Objective-C++.
</ul>
<p>This build contains basic support for C++ and Objective-C++ that is ready to be tried out
by general users. It is still in its infancy, but establishes a baseline for things to come. The main hope is that it can find some
issues and have a reasonable false positive rate.</p>
<p><b>Please</b> <a href="/filing_bugs.html">file bugs</a> when you see issues of any kind so we can assess
where development on C++ analysis support needs to be focused.</p>
<p>To try out C++ analysis support, it should work out of the box using <tt>scan-build</tt>. If you are using this checker build
as a replacement to the analyzer bundled with Xcode, first use the <tt>set-xcode-analyzer</tt> script to <a href="/xcode.html">change Xcode to use
your version of the analyzer</a>. You will then need to modify one configuration file in Xcode to enable C++ analysis support. This can
be done with the following steps:</p>
<ol>
<li>Find the clang .xcspec file:
<pre>$ cd /Developer/Library
$ find . | grep xcspec | grep Clang
./Xcode/<b><SNIP></b>/Clang LLVM 1.0.xcplugin/Contents/Resources/Clang LLVM 1.0.xcspec
</pre></li>
<li>The exact location of the file may vary depending on your installation of Xcode. Edit that file, and look for the string "--analyze":
<pre>
SourceFileOption = "--analyze";
FileTypes = (
"sourcecode.c.c",
"sourcecode.c.objc",
);
...
</pre>
Change the "FileTypes" entry to:
<pre>
FileTypes = (
"sourcecode.c.c",
"sourcecode.c.objc",
"sourcecode.cpp.cpp",
"sourcecode.cpp.objcpp",
);
</pre></li>
<li>Restart Xcode.</li>
</ol>
<h4 id="checker_255">checker-255</h4>
<p><b>built: </b> February 11, 2011<br>
<p><b>highlights:</b></p>
<ul>
<li>Mac OS X builds are now Intel <tt>i386</tt> and <tt>x86_64</tt> only (no <tt>ppc</tt> support)</li>
<li>Turns on new <tt>-init</tt> method checker by default</li>
<li>Reduces memory usage of analyzer by 10%</li>
<li>Misc. fixes to reduce false positives on dead stores and idempotent operations.</li>
</ul>
<h4 id="checker_254">checker-254</h4>
<p><b>built: </b> January 27, 2011<br>
<p><b>highlights:</b></p>
<ul>
<li>Introduces new <tt>-init</tt> method checker to check if a super class's init method is properly called.</li>
<li>Objective-C retain/release checker now reasons about calls to property accessor methods (setter/getter).</li>
<li>Introduces new attribute <a href="annotations.html#attr_ns_consumes_self">ns_consumes_self</a> to educate the Objective-C retain/release checker about custom "init-like" methods that do not follow the standard Cocoa naming conventions.</li>
<li>Introduces new attributes <a href="annotations.html#attr_ns_consumed">ns_consumed</a> and <a href="annotations.html#attr_cf_consumed">cf_consumed</a> to educate the Objective-C retain/release checker about methods/functions that decrement the reference count of a parameter.</li>
</ul>
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