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16 <h1>Release notes for <tt>checker-XXX</tt> builds</h1>
18 <h4 id="checker_267">checker-267</h4>
19 <p><b>built:</b> June 1, 2012</br>
20 <b>download:</b> <a href="http://bit.ly/OIdyI7">checker-267.tar.bz2</a></p>
21 <p><b>highlights:</b></p>
23 <p>Adds basic interprocedural analysis support for blocks.</p>
25 <h4 id="checker_266">checker-266</h4>
26 <p><b>built:</b> May 23, 2012</br>
27 <b>download:</b> <a href="http://bit.ly/LgtUWx">checker-266.tar.bz2</a></p>
28 <p><b>highlights:</b></p>
30 <p>Contains numerous stability fixes over checker-266, especially when analyzing C++11 code.</p>
32 <h4 id="checker_265">checker-265</h4>
33 <p><b>built:</b> May 8, 2012</br>
34 <b>download:</b> <a href="http://bit.ly/JceZBE">checker-265.tar.bz2</a></p>
35 <p><b>highlights:</b></p>
37 <p>This release contains a fix for a major crasher introduced in checker-264, and various refinements to
38 improve the precision and reduce the false positive rate of the analyzer. It also enables a new unix.MallocSizeof check, which reports
39 inconsistencies between the casted type of the return value of a 'malloc/calloc/realloc' call and the operand
40 of sizeof expressions contained within its argument(s).</p>
42 <h4 id="checker_264">checker-264</h4>
44 <p><b>built:</b> April 26, 2012</br>
45 <b>download:</b> <a href="http://bit.ly/JATSI8">checker-264.tar.bz2</a></p>
46 <p><b>highlights:</b></p>
48 <p>This release contains misc. bug fixes and performance enhancements over checker-263, including
49 a reduction of some kinds of false positives related to the malloc() checker.</p>
51 <h4 id="checker_263">checker-263</h4>
53 <p><b>built:</b> March 22, 2012</br>
54 <p><b>highlights:</b></p>
57 <li>Fixes several serious bugs with inter-procedural analysis, including a case where retain/releases would be "double-counted".</li>
60 <h4 id="checker_262">checker-262</h4>
62 <p><b>built: </b>March 15, 2012</br>
63 <p><b>highlights:</b></p>
66 <li>Enables experimental interprocedural analysis (within a file), which greatly amplifies the analyzer's ability to find issues.</li>
67 <li>Many bug fixes to the malloc/free checker.</li>
68 <li>Support for new Objective-C NSArray/NSDictionary/NSNumber literals syntax, and Objective-C container subscripting.</li>
71 <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>.
73 <h4 id="checker_261">checker-261</h4>
75 <p><b>built: </b>February 22, 2012<br>
76 <p><b>highlights:</b></p>
79 <li>Contains a new experimental malloc/free checker.</li>
80 <li>Better support for projects using ARC.</li>
81 <li>Warns about null pointers passed as arguments to C string functions.</li>
82 <li>Warns about common anti-patterns in 'strncat' size argument, which can lead to buffer overflows.</li>
83 <li>set-xcode-analyzer now supports self-contained Xcode.app (Xcode 4.3 and later).</li>
84 <li>Contains a newer version of the analyzer than Xcode 4.3.</li>
85 <li>Misc. bug fixes and performance work.</li>
88 <h4 id="checker_260">checker-260</h4>
90 <p><b>built: </b>January 25, 2012<br>
91 <p><b>highlights:</b></p>
93 <p>This is essentially the same as checker-259, but enables the following <i>experimental</i> checkers (please provide feedback):</p>
96 <li>Warns about unsafe uses of CFArrayCreate, CFSetCreate, and CFDictionaryCreate</li>
97 <li>Warns about unsafe uses of getpw, gets, which are sources of buffer overflows</li>
98 <li>Warns about unsafe uses of mktemp and mktemps, which can lead to insecure temporary files</li>
99 <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>
100 <li>Warns about not checking the return values of setuid, setgid, seteuid, setegid, setreuid, setregid (another security issue)</li>
103 <h4 id="checker_259">checker-259</h4>
105 <p><b>built: </b>January 25, 2012<br>
106 <p><b>highlights:</b></p>
109 <li>Contains a newer version of the analyzer than the one shipped in Xcode 4.2.</li>
110 <li>Significant performance optimizations to reduce memory usage of the analyzer.</li>
111 <li>Tweaks to scan-build to have it work more easily with Xcode projects using Clang.</li>
112 <li>Numerous bug fixes to better support code using ARC.</li>
115 <h4 id="checker_258">checker-258</h4>
117 <p><b>built: </b>October 13, 2011<br>
118 <p><b>highlights:</b></p>
121 <li>Contains a newer version of the analyzer than the one shipped in Xcode 4.2.</li>
122 <li>Adds a new security checker for looking at correct uses of the Mac OS KeyChain API.</li>
123 <li>Supports ARC (please file bugs where you see issues)</li>
124 <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>
127 <h4 id="checker_257">checker-257</h4>
129 <p><b>built: </b>May 25, 2011<br>
130 <p><b>highlights:</b></p>
133 <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>
134 <li>Fixed a serious regression where the analyzer would not analyze Objective-C methods in class extensions.</li>
135 <li>Misc. bug fixes to improve analyzer precision.
139 <h4 id="checker_256">checker-256</h4>
141 <p><b>built: </b>April 13, 2011<br>
142 <p><b>highlights:</b></p>
145 <li>Lots of bug fixes and improvements to analyzer precision (fewer false positives, possibly more bugs found).
146 <li>Introductory analysis support for C++ and Objective-C++.
149 <p>This build contains basic support for C++ and Objective-C++ that is ready to be tried out
150 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
151 issues and have a reasonable false positive rate.</p>
153 <p><b>Please</b> <a href="/filing_bugs.html">file bugs</a> when you see issues of any kind so we can assess
154 where development on C++ analysis support needs to be focused.</p>
156 <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
157 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
158 your version of the analyzer</a>. You will then need to modify one configuration file in Xcode to enable C++ analysis support. This can
159 be done with the following steps:</p>
162 <li>Find the clang .xcspec file:
163 <pre>$ cd /Developer/Library
164 $ find . | grep xcspec | grep Clang
165 ./Xcode/<b><SNIP></b>/Clang LLVM 1.0.xcplugin/Contents/Resources/Clang LLVM 1.0.xcspec
167 <li>The exact location of the file may vary depending on your installation of Xcode. Edit that file, and look for the string "--analyze":
169 SourceFileOption = "--analyze";
176 Change the "FileTypes" entry to:
181 "sourcecode.cpp.cpp",
182 "sourcecode.cpp.objcpp",
185 <li>Restart Xcode.</li>
188 <h4 id="checker_255">checker-255</h4>
190 <p><b>built: </b> February 11, 2011<br>
191 <p><b>highlights:</b></p>
194 <li>Mac OS X builds are now Intel <tt>i386</tt> and <tt>x86_64</tt> only (no <tt>ppc</tt> support)</li>
195 <li>Turns on new <tt>-init</tt> method checker by default</li>
196 <li>Reduces memory usage of analyzer by 10%</li>
197 <li>Misc. fixes to reduce false positives on dead stores and idempotent operations.</li>
200 <h4 id="checker_254">checker-254</h4>
202 <p><b>built: </b> January 27, 2011<br>
203 <p><b>highlights:</b></p>
206 <li>Introduces new <tt>-init</tt> method checker to check if a super class's init method is properly called.</li>
207 <li>Objective-C retain/release checker now reasons about calls to property accessor methods (setter/getter).</li>
208 <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>
209 <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>