News Feed
Sections




News Archive
Looking for more information on how to do PHP the right way? Check out PHP: The Right Way

Derick Rethans' Blog:
Valgrinding shared modules
August 08, 2011 @ 14:35:20

In the process of some development he's been doing on various shared modules for PHP, Derick Rethans stumbled across an issue with using Valgrind to test his code:

While testing whether I correctly free all memory with Valgrind, I ran into the issue where I couldn't see the stack frames of where the memory leaks occurred in the extensions, and once I even ran into a Valgrind bug. The reason why Valgrind could not show the function names belonging to the stack frames is because PHP had already unloaded the shared extensions from memory.

A work-around he found was compiling the modules, but he wanted something "more correct" and less of a hassle. As a result he added a check for the ZEND_DONT_UNLOAD_MODULES environment flag to the PHP core to handles this case specifically. He includes a snippet of example code showing the Valgrind results with and without the flag.

0 comments voice your opinion now!
valgrind memory flag unload extension patch


blog comments powered by Disqus

Similar Posts

Mike Lively's Blog: Late Static Binding - Changes to parent

DevShed: Using the Xdebug Extension's xdebug_call_function() Function

Douglas Clifton's Blog: Cachegrind your Web apps

Developer Tutorials Blog: And the winner of the most important security tip competition is...

SitePoint PHP Blog: PHP extension for Cairo graphics library


Community Events





Don't see your event here?
Let us know!


deployment series symfony bugfix framework language podcast laravel tips package release introduction opinion community interview api voicesoftheelephpant install library list

All content copyright, 2014 PHPDeveloper.org :: info@phpdeveloper.org - Powered by the Solar PHP Framework