1<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" 2 "http://www.w3.org/TR/html4/strict.dtd"> 3<html> 4<head> 5 <title>Release notes for checker-XXX builds</title> 6 <link type="text/css" rel="stylesheet" href="menu.css"> 7 <link type="text/css" rel="stylesheet" href="content.css"> 8 <script type="text/javascript" src="scripts/menu.js"></script> 9</head> 10<body> 11 12<div id="page"> 13<!--#include virtual="menu.html.incl"--> 14<div id="content"> 15 16<h1>Release notes for <tt>checker-XXX</tt> builds</h1> 17 18<h4 id="checker_276">checker-276</h4> 19<p><b>built:</b> February 19, 2014</br> 20 <b>download:</b> <a href="downloads/checker-276.tar.bz2">checker-276.tar.bz2</a></p> 21 <p><b>highlights:</b></p> 22 <ul> 23 <li>Includes about 9 months of change to Clang itself (improved C++11/14 support, etc.)</li> 24 <li>More precise modeling of Objective-C properties, which enables the analyzer to find more bugs.</li> 25 <li>Includes a new "missing call to <tt>super</tt>" warning, which looks for common pattern in iOS/OSX APIs that require chaining a call to a super class's implementation of a method.</li> 26 <li>Accepts <tt>-arch arm64</tt> (which may be passed by Xcode 5.0), but for the time being analyzes code in such cases as <tt>-arch armv7s</tt>.</li> 27 <li>Many sundry fixes, improvements to C++ support, etc.</li> 28 </ul> 29 30<h4 id="checker_275">checker-275</h4> 31<p><b>built:</b> May 23, 2013</br> 32 <b>download:</b> <a href="downloads/checker-275.tar.bz2">checker-275.tar.bz2</a></p> 33 <p><b>highlights:</b></p> 34 <ul> 35 <li>Xcode: Includes a new arrow layout algorithm for issue presentation within Xcode. The goal is for interprocedural bug reports to look cleaner and less busy (and easier to read). Feedback appreciated.</li> 36 <li>Xcode: Bugs that occur within header code (e.g., C++) are now reported within the callers in the main source file. For example, if you misuse a C++ function declared in a header the primary diagnostic will be in the caller (in the main source file). The full expanded path, however, will show the bug in the header code as well. These kind of cross-file issues are currently only support by Xcode, not the HTML output.</li> 37 <li>This build is built with LLVM's Link-Time Optimization (LTO), which should make it slightly faster.</li> 38 <li>LTO also reduces the download size (about 19% smaller than checker-274).</li> 39 <li>Many sundry fixes.</li> 40 </ul> 41 42<h4 id="checker_274">checker-274</h4> 43<p><b>built:</b> April 23, 2013</br> 44 <b>download:</b> <a href="https://attache.apple.com/AttacheWeb/dl?id=ATCdb3165f4406a4589b5878a22494c3b79">checker-274.tar.bz2</a></p> 45 <p><b>highlights:</b></p> 46 <ul> 47 <li>Improved use-after-free and mismatched deallocator checking.</li> 48 <li>Diagnostic polish.</li> 49 <li>Fixes crashes found in checker-273.</li> 50 </ul> 51 52<h4 id="checker_273">checker-273</h4> 53<p><b>built:</b> April 8, 2013</br> 54 <b>download:</b> <a href="https://attache.apple.com/AttacheWeb/dl?id=ATCdefcc852a99546cfbaba2a960e07478e">checker-273.tar.bz2</a></p> 55 <p><b>highlights:</b></p> 56 <ul> 57 <li>Additional checks for misuse of Foundation collection APIs. 58 <li>New C++ checker for attempting to create a reference to null.</li> 59 <li>New use-after-free checker for C++ 'delete'.</li> 60 <li>New checker for simple cases of mismatched allocators and deallocators, e.g. "delete malloc(4);"</li> 61 <li>Support for basic interprocedural analysis of C++ destructors.</li> 62 <li>Additional heuristics for suppressing null pointer false positives.</li> 63 <li>Misc. bug fixes and performance enhancements.</li> 64 </ul> 65 66<h4 id="checker_272">checker-272</h4> 67<p><b>built:</b> March 1, 2013</p> 68 <p><b>highlights:</b></p> 69 <ul> 70 <li>Better modeling of C++ constructors: 71 <ul> 72 <li>Interprocedural analysis support for constructors of types with trivial destructors</li> 73 <li>Efficient model of trivial copy and move constructors</li> 74 </ul> 75 </li> 76 <li>Better diagnostics for loops that execute 0 times</li> 77 <li>Fixes a linking issue that prevented the checker from running on OS X v10.6 and earlier</li> 78 <li>Fixes for misc. crashes and false positives</li> 79 </ul> 80 81<h4 id="checker_271">checker-271</h4> 82<p><b>built:</b> February 8, 2013</p> 83 <p><b>highlights:</b></p> 84 <ul> 85 <li>Faster analysis for <tt>scan-build xcodebuild</tt> when using Xcode 4.6 and higher: 86 <ul> 87 <li><tt>scan-build</tt> now uses Xcode's built-in interposition mechanism for the static analyzer to provide faster builds while doing static analysis (PCH files are now built).</li> 88 <li>This change also allows <tt>scan-build</tt> to have better support for iOS project analysis without having to specifying weird SDK settings to <tt>scan-build</tt>.</li> 89 </ul></li> 90 <li>Better diagnostics for implicitly-defined member functions in C++.</li> 91 <li>New warning for <tt>malloc</tt>/<tt>free</tt> checker when passing <tt>malloc</tt>'ed pointer with non-zero offset to <tt>free()</tt>. 92 <li>Fixes for misc. parser crashes.</li> 93 <li>Newer than the static analyzer version in Xcode 4.6</li> 94 </ul> 95 96<h4 id="checker_270">checker-270</h4> 97<p><b>built:</b> January 4, 2013</p> 98 <p><b>highlights:</b></p> 99 <ul> 100 <li>Major performance enhancements to speed up interprocedural analysis.</li> 101 <li>Misc. bug fixes.</li> 102 </ul> 103 104<h4 id="checker_269">checker-269</h4> 105<p><b>built:</b> September 25, 2012</p> 106 <p><b>highlights:</b></p> 107 <ul> 108 <li>Significantly improves interprocedural analysis for Objective-C.</li> 109 <li>Numerous bug fixes and heuristics to reduce false positives reported 110 over checker-268.</li> 111 </ul> 112 113<h4 id="checker_268">checker-268</h4> 114<p><b>built:</b> September 11, 2012</p> 115 <p><b>highlights:</b></p> 116 117<ul> 118 <li>Adds initial interprocedural analysis support for C++ and Objective-C. This will greatly improve analysis coverage and find deeper bugs in Objective-C and C++ code.</li> 119 <li>Contains a static analyzer newer than Xcode 4.4.</li> 120</ul> 121 122<p>NOTE: this checker build includes a <i>huge</i> number of changes. It has the potential to find many more bugs, but may report new kinds of false positives. We'd like to know about 123these, and any other problems you encounter. When you encounter an issue, please <a href="/filing_bugs.html">file a bug report</a>.</p> 124 125<h4 id="checker_267">checker-267</h4> 126<p><b>built:</b> June 1, 2012</p> 127 <p><b>highlights:</b></p> 128 129<p>Adds basic interprocedural analysis support for blocks.</p> 130 131<h4 id="checker_266">checker-266</h4> 132<p><b>built:</b> May 23, 2012</p> 133 <p><b>highlights:</b></p> 134 135<p>Contains numerous stability fixes over checker-266, especially when analyzing C++11 code.</p> 136 137<h4 id="checker_265">checker-265</h4> 138<p><b>built:</b> May 8, 2012</p> 139 <p><b>highlights:</b></p> 140 141<p>This release contains a fix for a major crasher introduced in checker-264, and various refinements to 142improve the precision and reduce the false positive rate of the analyzer. It also enables a new unix.MallocSizeof check, which reports 143inconsistencies between the casted type of the return value of a 'malloc/calloc/realloc' call and the operand 144of sizeof expressions contained within its argument(s).</p> 145 146<h4 id="checker_264">checker-264</h4> 147 148<p><b>built:</b> April 26, 2012</p> 149 <p><b>highlights:</b></p> 150 151<p>This release contains misc. bug fixes and performance enhancements over checker-263, including 152 a reduction of some kinds of false positives related to the malloc() checker.</p> 153 154<h4 id="checker_263">checker-263</h4> 155 156<p><b>built:</b> March 22, 2012</p> 157<p><b>highlights:</b></p> 158 159<ul> 160<li>Fixes several serious bugs with inter-procedural analysis, including a case where retain/releases would be "double-counted".</li> 161</ul> 162 163<h4 id="checker_262">checker-262</h4> 164 165<p><b>built: </b>March 15, 2012</p> 166<p><b>highlights:</b></p> 167 168<ul> 169 <li>Enables experimental interprocedural analysis (within a file), which greatly amplifies the analyzer's ability to find issues.</li> 170 <li>Many bug fixes to the malloc/free checker.</li> 171 <li>Support for new Objective-C NSArray/NSDictionary/NSNumber literals syntax, and Objective-C container subscripting.</li> 172</ul> 173 174<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>. 175 176<h4 id="checker_261">checker-261</h4> 177 178<p><b>built: </b>February 22, 2012<br> 179<p><b>highlights:</b></p> 180 181<ul> 182 <li>Contains a new experimental malloc/free checker.</li> 183 <li>Better support for projects using ARC.</li> 184 <li>Warns about null pointers passed as arguments to C string functions.</li> 185 <li>Warns about common anti-patterns in 'strncat' size argument, which can lead to buffer overflows.</li> 186 <li>set-xcode-analyzer now supports self-contained Xcode.app (Xcode 4.3 and later).</li> 187 <li>Contains a newer version of the analyzer than Xcode 4.3.</li> 188 <li>Misc. bug fixes and performance work.</li> 189</ul> 190 191<h4 id="checker_260">checker-260</h4> 192 193<p><b>built: </b>January 25, 2012<br> 194<p><b>highlights:</b></p> 195 196<p>This is essentially the same as checker-259, but enables the following <i>experimental</i> checkers (please provide feedback):</p> 197 198<ul> 199 <li>Warns about unsafe uses of CFArrayCreate, CFSetCreate, and CFDictionaryCreate</li> 200 <li>Warns about unsafe uses of getpw, gets, which are sources of buffer overflows</li> 201 <li>Warns about unsafe uses of mktemp and mktemps, which can lead to insecure temporary files</li> 202 <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> 203 <li>Warns about not checking the return values of setuid, setgid, seteuid, setegid, setreuid, setregid (another security issue)</li> 204</ul> 205 206<h4 id="checker_259">checker-259</h4> 207 208<p><b>built: </b>January 25, 2012<br> 209<p><b>highlights:</b></p> 210 211<ul> 212 <li>Contains a newer version of the analyzer than the one shipped in Xcode 4.2.</li> 213 <li>Significant performance optimizations to reduce memory usage of the analyzer.</li> 214 <li>Tweaks to scan-build to have it work more easily with Xcode projects using Clang.</li> 215 <li>Numerous bug fixes to better support code using ARC.</li> 216</ul> 217 218<h4 id="checker_258">checker-258</h4> 219 220<p><b>built: </b>October 13, 2011<br> 221<p><b>highlights:</b></p> 222 223<ul> 224 <li>Contains a newer version of the analyzer than the one shipped in Xcode 4.2.</li> 225 <li>Adds a new security checker for looking at correct uses of the Mac OS KeyChain API.</li> 226 <li>Supports ARC (please file bugs where you see issues)</li> 227 <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> 228</ul> 229 230<h4 id="checker_257">checker-257</h4> 231 232<p><b>built: </b>May 25, 2011<br> 233<p><b>highlights:</b></p> 234 235<ul> 236 <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> 237 <li>Fixed a serious regression where the analyzer would not analyze Objective-C methods in class extensions.</li> 238 <li>Misc. bug fixes to improve analyzer precision. 239 </li> 240</ul> 241 242<h4 id="checker_256">checker-256</h4> 243 244<p><b>built: </b>April 13, 2011<br> 245<p><b>highlights:</b></p> 246 247<ul> 248 <li>Lots of bug fixes and improvements to analyzer precision (fewer false positives, possibly more bugs found). 249 <li>Introductory analysis support for C++ and Objective-C++. 250</ul> 251 252<p>This build contains basic support for C++ and Objective-C++ that is ready to be tried out 253 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 254 issues and have a reasonable false positive rate.</p> 255 256<p><b>Please</b> <a href="/filing_bugs.html">file bugs</a> when you see issues of any kind so we can assess 257 where development on C++ analysis support needs to be focused.</p> 258 259<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 260 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 261 your version of the analyzer</a>. You will then need to modify one configuration file in Xcode to enable C++ analysis support. This can 262 be done with the following steps:</p> 263 264<ol> 265 <li>Find the clang .xcspec file: 266<pre>$ cd /Developer/Library 267$ find . | grep xcspec | grep Clang 268/Xcode/<b><SNIP></b>/Clang LLVM 1.0.xcplugin/Contents/Resources/Clang LLVM 1.0.xcspec 269</pre></li> 270 <li>The exact location of the file may vary depending on your installation of Xcode. Edit that file, and look for the string "--analyze": 271<pre> 272 SourceFileOption = "--analyze"; 273 FileTypes = ( 274 "sourcecode.c.c", 275 "sourcecode.c.objc", 276 ); 277 ... 278</pre> 279 Change the "FileTypes" entry to: 280<pre> 281 FileTypes = ( 282 "sourcecode.c.c", 283 "sourcecode.c.objc", 284 "sourcecode.cpp.cpp", 285 "sourcecode.cpp.objcpp", 286 ); 287</pre></li> 288<li>Restart Xcode.</li> 289</ol> 290 291<h4 id="checker_255">checker-255</h4> 292 293<p><b>built: </b> February 11, 2011<br> 294<p><b>highlights:</b></p> 295 296<ul> 297<li>Mac OS X builds are now Intel <tt>i386</tt> and <tt>x86_64</tt> only (no <tt>ppc</tt> support)</li> 298<li>Turns on new <tt>-init</tt> method checker by default</li> 299<li>Reduces memory usage of analyzer by 10%</li> 300<li>Misc. fixes to reduce false positives on dead stores and idempotent operations.</li> 301</ul> 302 303<h4 id="checker_254">checker-254</h4> 304 305<p><b>built: </b> January 27, 2011<br> 306<p><b>highlights:</b></p> 307 308<ul> 309<li>Introduces new <tt>-init</tt> method checker to check if a super class's init method is properly called.</li> 310<li>Objective-C retain/release checker now reasons about calls to property accessor methods (setter/getter).</li> 311<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> 312<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> 313</ul> 314 315</div> 316</div> 317</body> 318</html> 319 320