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16 <h1>Release notes for <tt>checker-XXX</tt> builds</h1>
18 <h4 id="checker_258">checker-258</h4>
20 <p><b>built:</b>October 13, 2011<br>
21 <b>download:</b> <a href="/checker/checker-258.tar.bz2">checker-258.tar.bz2</a></p>
22 <p><b>highlights:</b></p>
25 <li>Contains a newer version of the analyzer than the one shipped in Xcode 4.2.</li>
26 <li>Adds a new security checker for looking at correct uses of the Mac OS KeyChain API.</li>
27 <li>Supports ARC (please file bugs where you see issues)</li>
28 <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>
31 <h4 id="checker_257">checker-257</h4>
33 <p><b>built:</b>May 25, 2011<br>
34 <b>download:</b> <a href="/checker/checker-257.tar.bz2">checker-257.tar.bz2</a></p>
35 <p><b>highlights:</b></p>
38 <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>
39 <li>Fixed a serious regression where the analyzer would not analyze Objective-C methods in class extensions.</li>
40 <li>Misc. bug fixes to improve analyzer precision.
44 <h4 id="checker_256">checker-256</h4>
46 <p><b>built:</b>April 13, 2011<br>
47 <b>download:</b> <a href="/checker/checker-256.tar.bz2">checker-256.tar.bz2</a></p>
48 <p><b>highlights:</b></p>
51 <li>Lots of bug fixes and improvements to analyzer precision (fewer false positives, possibly more bugs found).
52 <li>Introductory analysis support for C++ and Objective-C++.
55 <p>This build contains basic support for C++ and Objective-C++ that is ready to be tried out
56 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
57 issues and have a reasonable false positive rate.</p>
59 <p><b>Please</b> <a href="/filing_bugs.html">file bugs</a> when you see issues of any kind so we can assess
60 where development on C++ analysis support needs to be focused.</p>
62 <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
63 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
64 your version of the analyzer</a>. You will then need to modify one configuration file in Xcode to enable C++ analysis support. This can
65 be done with the following steps:</p>
68 <li>Find the clang .xcspec file:
69 <pre>$ cd /Developer/Library
70 $ find . | grep xcspec | grep Clang
71 ./Xcode/<b><SNIP></b>/Clang LLVM 1.0.xcplugin/Contents/Resources/Clang LLVM 1.0.xcspec
73 <li>The exact location of the file may vary depending on your installation of Xcode. Edit that file, and look for the string "--analyze":
75 SourceFileOption = "--analyze";
82 Change the "FileTypes" entry to:
88 "sourcecode.cpp.objcpp",
91 <li>Restart Xcode.</li>
94 <h4 id="checker_255">checker-255</h4>
96 <p><b>built:</b> February 11, 2011<br>
97 <b>download:</b> <a href="/checker/checker-255.tar.bz2">checker-255.tar.bz2</a></p>
98 <p><b>highlights:</b></p>
101 <li>Mac OS X builds are now Intel <tt>i386</tt> and <tt>x86_64</tt> only (no <tt>ppc</tt> support)</li>
102 <li>Turns on new <tt>-init</tt> method checker by default</li>
103 <li>Reduces memory usage of analyzer by 10%</li>
104 <li>Misc. fixes to reduce false positives on dead stores and idempotent operations.</li>
107 <h4 id="checker_254">checker-254</h4>
109 <p><b>built:</b> January 27, 2011<br>
110 <b>download:</b> <a href="/checker/checker-254.tar.bz2">checker-254.tar.bz2</a></p>
111 <p><b>highlights:</b></p>
114 <li>Introduces new <tt>-init</tt> method checker to check if a super class's init method is properly called.</li>
115 <li>Objective-C retain/release checker now reasons about calls to property accessor methods (setter/getter).</li>
116 <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>
117 <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>