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_275">checker-275</h4> 19 <p><b>built:</b> May 23, 2013</br> 20 <b>download:</b> <a href="https://attache.apple.com/AttacheWeb/dl?id=ATCa7ffcf434b2d42e2808c038760f52a77">checker-275.tar.bz2</a></p> 21 <p><b>highlights:</b></p> 22 <ul> 23 <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> 24 <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> 25 <li>This build is built with LLVM's Link-Time Optimization (LTO), which should make it slightly faster.</li> 26 <li>LTO also reduces the download size (about 19% smaller than checker-274).</li> 27 <li>Many sundry fixes.</li> 28 </ul> 29 30 <h4 id="checker_274">checker-274</h4> 31 <p><b>built:</b> April 23, 2013</br> 32 <b>download:</b> <a href="https://attache.apple.com/AttacheWeb/dl?id=ATCdb3165f4406a4589b5878a22494c3b79">checker-274.tar.bz2</a></p> 33 <p><b>highlights:</b></p> 34 <ul> 35 <li>Improved use-after-free and mismatched deallocator checking.</li> 36 <li>Diagnostic polish.</li> 37 <li>Fixes crashes found in checker-273.</li> 38 </ul> 39 40 <h4 id="checker_273">checker-273</h4> 41 <p><b>built:</b> April 8, 2013</br> 42 <b>download:</b> <a href="https://attache.apple.com/AttacheWeb/dl?id=ATCdefcc852a99546cfbaba2a960e07478e">checker-273.tar.bz2</a></p> 43 <p><b>highlights:</b></p> 44 <ul> 45 <li>Additional checks for misuse of Foundation collection APIs. 46 <li>New C++ checker for attempting to create a reference to null.</li> 47 <li>New use-after-free checker for C++ 'delete'.</li> 48 <li>New checker for simple cases of mismatched allocators and deallocators, e.g. "delete malloc(4);"</li> 49 <li>Support for basic interprocedural analysis of C++ destructors.</li> 50 <li>Additional heuristics for suppressing null pointer false positives.</li> 51 <li>Misc. bug fixes and performance enhancements.</li> 52 </ul> 53 54 <h4 id="checker_272">checker-272</h4> 55 <p><b>built:</b> March 1, 2013</p> 56 <p><b>highlights:</b></p> 57 <ul> 58 <li>Better modeling of C++ constructors: 59 <ul> 60 <li>Interprocedural analysis support for constructors of types with trivial destructors</li> 61 <li>Efficient model of trivial copy and move constructors</li> 62 </ul> 63 </li> 64 <li>Better diagnostics for loops that execute 0 times</li> 65 <li>Fixes a linking issue that prevented the checker from running on OS X v10.6 and earlier</li> 66 <li>Fixes for misc. crashes and false positives</li> 67 </ul> 68 69 <h4 id="checker_271">checker-271</h4> 70 <p><b>built:</b> February 8, 2013</p> 71 <p><b>highlights:</b></p> 72 <ul> 73 <li>Faster analysis for <tt>scan-build xcodebuild</tt> when using Xcode 4.6 and higher: 74 <ul> 75 <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> 76 <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> 77 </ul></li> 78 <li>Better diagnostics for implicitly-defined member functions in C++.</li> 79 <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>. 80 <li>Fixes for misc. parser crashes.</li> 81 <li>Newer than the static analyzer version in Xcode 4.6</li> 82 </ul> 83 84 <h4 id="checker_270">checker-270</h4> 85 <p><b>built:</b> January 4, 2013</p> 86 <p><b>highlights:</b></p> 87 <ul> 88 <li>Major performance enhancements to speed up interprocedural analysis.</li> 89 <li>Misc. bug fixes.</li> 90 </ul> 91 92 <h4 id="checker_269">checker-269</h4> 93 <p><b>built:</b> September 25, 2012</p> 94 <p><b>highlights:</b></p> 95 <ul> 96 <li>Significantly improves interprocedural analysis for Objective-C.</li> 97 <li>Numerous bug fixes and heuristics to reduce false positives reported 98 over checker-268.</li> 99 </ul> 100 101 <h4 id="checker_268">checker-268</h4> 102 <p><b>built:</b> September 11, 2012</p> 103 <p><b>highlights:</b></p> 104 105 <ul> 106 <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> 107 <li>Contains a static analyzer newer than Xcode 4.4.</li> 108 </ul> 109 110 <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 111 these, and any other problems you encounter. When you encounter an issue, please <a href="/filing_bugs.html">file a bug report</a>.</p> 112 113 <h4 id="checker_267">checker-267</h4> 114 <p><b>built:</b> June 1, 2012</p> 115 <p><b>highlights:</b></p> 116 117 <p>Adds basic interprocedural analysis support for blocks.</p> 118 119 <h4 id="checker_266">checker-266</h4> 120 <p><b>built:</b> May 23, 2012</p> 121 <p><b>highlights:</b></p> 122 123 <p>Contains numerous stability fixes over checker-266, especially when analyzing C++11 code.</p> 124 125 <h4 id="checker_265">checker-265</h4> 126 <p><b>built:</b> May 8, 2012</p> 127 <p><b>highlights:</b></p> 128 129 <p>This release contains a fix for a major crasher introduced in checker-264, and various refinements to 130 improve the precision and reduce the false positive rate of the analyzer. It also enables a new unix.MallocSizeof check, which reports 131 inconsistencies between the casted type of the return value of a 'malloc/calloc/realloc' call and the operand 132 of sizeof expressions contained within its argument(s).</p> 133 134 <h4 id="checker_264">checker-264</h4> 135 136 <p><b>built:</b> April 26, 2012</p> 137 <p><b>highlights:</b></p> 138 139 <p>This release contains misc. bug fixes and performance enhancements over checker-263, including 140 a reduction of some kinds of false positives related to the malloc() checker.</p> 141 142 <h4 id="checker_263">checker-263</h4> 143 144 <p><b>built:</b> March 22, 2012</p> 145 <p><b>highlights:</b></p> 146 147 <ul> 148 <li>Fixes several serious bugs with inter-procedural analysis, including a case where retain/releases would be "double-counted".</li> 149 </ul> 150 151 <h4 id="checker_262">checker-262</h4> 152 153 <p><b>built: </b>March 15, 2012</p> 154 <p><b>highlights:</b></p> 155 156 <ul> 157 <li>Enables experimental interprocedural analysis (within a file), which greatly amplifies the analyzer's ability to find issues.</li> 158 <li>Many bug fixes to the malloc/free checker.</li> 159 <li>Support for new Objective-C NSArray/NSDictionary/NSNumber literals syntax, and Objective-C container subscripting.</li> 160 </ul> 161 162 <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>. 163 164 <h4 id="checker_261">checker-261</h4> 165 166 <p><b>built: </b>February 22, 2012<br> 167 <p><b>highlights:</b></p> 168 169 <ul> 170 <li>Contains a new experimental malloc/free checker.</li> 171 <li>Better support for projects using ARC.</li> 172 <li>Warns about null pointers passed as arguments to C string functions.</li> 173 <li>Warns about common anti-patterns in 'strncat' size argument, which can lead to buffer overflows.</li> 174 <li>set-xcode-analyzer now supports self-contained Xcode.app (Xcode 4.3 and later).</li> 175 <li>Contains a newer version of the analyzer than Xcode 4.3.</li> 176 <li>Misc. bug fixes and performance work.</li> 177 </ul> 178 179 <h4 id="checker_260">checker-260</h4> 180 181 <p><b>built: </b>January 25, 2012<br> 182 <p><b>highlights:</b></p> 183 184 <p>This is essentially the same as checker-259, but enables the following <i>experimental</i> checkers (please provide feedback):</p> 185 186 <ul> 187 <li>Warns about unsafe uses of CFArrayCreate, CFSetCreate, and CFDictionaryCreate</li> 188 <li>Warns about unsafe uses of getpw, gets, which are sources of buffer overflows</li> 189 <li>Warns about unsafe uses of mktemp and mktemps, which can lead to insecure temporary files</li> 190 <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> 191 <li>Warns about not checking the return values of setuid, setgid, seteuid, setegid, setreuid, setregid (another security issue)</li> 192 </ul> 193 194 <h4 id="checker_259">checker-259</h4> 195 196 <p><b>built: </b>January 25, 2012<br> 197 <p><b>highlights:</b></p> 198 199 <ul> 200 <li>Contains a newer version of the analyzer than the one shipped in Xcode 4.2.</li> 201 <li>Significant performance optimizations to reduce memory usage of the analyzer.</li> 202 <li>Tweaks to scan-build to have it work more easily with Xcode projects using Clang.</li> 203 <li>Numerous bug fixes to better support code using ARC.</li> 204 </ul> 205 206 <h4 id="checker_258">checker-258</h4> 207 208 <p><b>built: </b>October 13, 2011<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>Adds a new security checker for looking at correct uses of the Mac OS KeyChain API.</li> 214 <li>Supports ARC (please file bugs where you see issues)</li> 215 <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> 216 </ul> 217 218 <h4 id="checker_257">checker-257</h4> 219 220 <p><b>built: </b>May 25, 2011<br> 221 <p><b>highlights:</b></p> 222 223 <ul> 224 <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> 225 <li>Fixed a serious regression where the analyzer would not analyze Objective-C methods in class extensions.</li> 226 <li>Misc. bug fixes to improve analyzer precision. 227 </li> 228 </ul> 229 230 <h4 id="checker_256">checker-256</h4> 231 232 <p><b>built: </b>April 13, 2011<br> 233 <p><b>highlights:</b></p> 234 235 <ul> 236 <li>Lots of bug fixes and improvements to analyzer precision (fewer false positives, possibly more bugs found). 237 <li>Introductory analysis support for C++ and Objective-C++. 238 </ul> 239 240 <p>This build contains basic support for C++ and Objective-C++ that is ready to be tried out 241 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 242 issues and have a reasonable false positive rate.</p> 243 244 <p><b>Please</b> <a href="/filing_bugs.html">file bugs</a> when you see issues of any kind so we can assess 245 where development on C++ analysis support needs to be focused.</p> 246 247 <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 248 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 249 your version of the analyzer</a>. You will then need to modify one configuration file in Xcode to enable C++ analysis support. This can 250 be done with the following steps:</p> 251 252 <ol> 253 <li>Find the clang .xcspec file: 254 <pre>$ cd /Developer/Library 255 $ find . | grep xcspec | grep Clang 256 ./Xcode/<b><SNIP></b>/Clang LLVM 1.0.xcplugin/Contents/Resources/Clang LLVM 1.0.xcspec 257 </pre></li> 258 <li>The exact location of the file may vary depending on your installation of Xcode. Edit that file, and look for the string "--analyze": 259 <pre> 260 SourceFileOption = "--analyze"; 261 FileTypes = ( 262 "sourcecode.c.c", 263 "sourcecode.c.objc", 264 ); 265 ... 266 </pre> 267 Change the "FileTypes" entry to: 268 <pre> 269 FileTypes = ( 270 "sourcecode.c.c", 271 "sourcecode.c.objc", 272 "sourcecode.cpp.cpp", 273 "sourcecode.cpp.objcpp", 274 ); 275 </pre></li> 276 <li>Restart Xcode.</li> 277 </ol> 278 279 <h4 id="checker_255">checker-255</h4> 280 281 <p><b>built: </b> February 11, 2011<br> 282 <p><b>highlights:</b></p> 283 284 <ul> 285 <li>Mac OS X builds are now Intel <tt>i386</tt> and <tt>x86_64</tt> only (no <tt>ppc</tt> support)</li> 286 <li>Turns on new <tt>-init</tt> method checker by default</li> 287 <li>Reduces memory usage of analyzer by 10%</li> 288 <li>Misc. fixes to reduce false positives on dead stores and idempotent operations.</li> 289 </ul> 290 291 <h4 id="checker_254">checker-254</h4> 292 293 <p><b>built: </b> January 27, 2011<br> 294 <p><b>highlights:</b></p> 295 296 <ul> 297 <li>Introduces new <tt>-init</tt> method checker to check if a super class's init method is properly called.</li> 298 <li>Objective-C retain/release checker now reasons about calls to property accessor methods (setter/getter).</li> 299 <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> 300 <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> 301 </ul> 302 303 </div> 304 </div> 305 </body> 306 </html> 307 308
