diff options
Diffstat (limited to 'www/analyzer/alpha_checks.html')
| -rw-r--r-- | www/analyzer/alpha_checks.html | 82 |
1 files changed, 76 insertions, 6 deletions
diff --git a/www/analyzer/alpha_checks.html b/www/analyzer/alpha_checks.html index 6f5e4f1708019..0312d16aced46 100644 --- a/www/analyzer/alpha_checks.html +++ b/www/analyzer/alpha_checks.html @@ -26,13 +26,14 @@ Patches welcome! <ul> <li><a href="#core_alpha_checkers">Core Alpha Checkers</a></li> <li><a href="#cplusplus_alpha_checkers">C++ Alpha Checkers</a></li> +<li><a href="#valist_alpha_checkers">Variable Argument Alpha Checkers</a></li> <li><a href="#deadcode_alpha_checkers">Dead Code Alpha Checkers</a></li> <li><a href="#osx_alpha_checkers">OS X Alpha Checkers</a></li> <li><a href="#security_alpha_checkers">Security Alpha Checkers</a></li> <li><a href="#unix_alpha_checkers">Unix Alpha Checkers</a></li> </ul> -<!------------------------------ core alpha -----------------------------------> +<!-- ============================= core alpha ============================= --> <h3 id="core_alpha_checkers">Core Alpha Checkers</h3> <table class="checkers"> <colgroup><col class="namedescr"><col class="example"></colgroup> @@ -179,7 +180,7 @@ int test(struct s *p) { </tbody></table> -<!--------------------------- cplusplus alpha ---------------------------------> +<!-- =========================== cplusplus alpha =========================== --> <h3 id="cplusplus_alpha_checkers">C++ Alpha Checkers</h3> <table class="checkers"> <colgroup><col class="namedescr"><col class="example"></colgroup> @@ -226,7 +227,76 @@ public: </tbody></table> -<!--------------------------- dead code alpha ---------------------------------> + + +<!-- =============================== va_list =============================== --> +<h3 id="valist_alpha_checkers">Variable Argument Alpha Checkers</h3> +<table class="checkers"> +<colgroup><col class="namedescr"><col class="example"></colgroup> +<thead><tr><td>Name, Description</td><td>Example</td></tr></thead> + +<tbody> +<tr><td><div class="namedescr expandable"><span class="name"> +alpha.valist.CopyToSelf</span><span class="lang"> +(C)</span><div class="descr"> +Calls to the <code>va_copy</code> macro should not copy onto itself.</div></div></td> +<td><div class="exampleContainer expandable"> +<div class="example"><pre> +#include <stdarg.h> + +void test(int x, ...) { + va_list args; + va_start(args, x); + va_copy(args, args); // warn + va_end(args); +} +</pre></div></div></td></tr> + +<tr><td><div class="namedescr expandable"><span class="name"> +alpha.valist.Uninitialized</span><span class="lang"> +(C)</span><div class="descr"> +Calls to the <code>va_arg</code>, <code>va_copy</code>, or +<code>va_end</code> macro must happen after calling <code>va_start</code> and +before calling <code>va_end</code>.</div></div></td> +<td><div class="exampleContainer expandable"> +<div class="example"><pre> +#include <stdarg.h> + +void test(int x, ...) { + va_list args; + int y = va_arg(args, int); // warn +} +</pre></div> +<div class="example"><pre> +#include <stdarg.h> + +void test(int x, ...) { + va_list args; + va_start(args, x); + va_end(args); + int z = va_arg(args, int); // warn +} +</pre></div></div></td></tr> + +<tr><td><div class="namedescr expandable"><span class="name"> +alpha.valist.Unterminated</span><span class="lang"> +(C)</span><div class="descr"> +Every <code>va_start</code> must be matched by a <code>va_end</code>. A va_list +can only be ended once.</div></div></td> +<td><div class="exampleContainer expandable"> +<div class="example"><pre> +#include <stdarg.h> + +void test(int x, ...) { + va_list args; + va_start(args, x); + int y = x + va_arg(args, int); +} // warn: missing va_end +</pre></div></div></td></tr> + +</tbody></table> + +<!-- =========================== dead code alpha =========================== --> <h3 id="deadcode_alpha_checkers">Dead Code Alpha Checkers</h3> <table class="checkers"> <colgroup><col class="namedescr"><col class="example"></colgroup> @@ -267,7 +337,7 @@ void test(id x) { </pre></div></div></td></tr> </tbody></table> -<!---------------------------- OS X alpha --------------------------------------> +<!-- ============================== OS X alpha ============================== --> <h3 id="osx_alpha_checkers">OS X Alpha Checkers</h3> <table class="checkers"> <colgroup><col class="namedescr"><col class="example"></colgroup> @@ -433,7 +503,7 @@ invalidatable instance variables.</div></div></td> </tbody></table> -<!------------------------- security alpha ------------------------------------> +<!-- =========================== security alpha =========================== --> <h3 id="security_alpha_checkers">Security Alpha Checkers</h3> <table class="checkers"> <colgroup><col class="namedescr"><col class="example"></colgroup> @@ -584,7 +654,7 @@ void test() { </tbody></table> -<!--------------------------- unix alpha --------------------------------------> +<!-- ============================= unix alpha ============================= --> <h3 id="unix_alpha_checkers">Unix Alpha Checkers</h3> <table class="checkers"> <colgroup><col class="namedescr"><col class="example"></colgroup> |