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

Expirmentalworks.net: Inofficial PHP GIT repositories - Importing large trees

Gopal Vijayaraghavan's Blog: PHP Noodle Soup!

SecurityReason.com: PHP 5.2.4 Released...unpatched

Zend Developer Zone: PHP Built in Input filtering

Greg Beaver's Blog: Holy Release Party, Batman


Community Events

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


example laravel podcast xdebug voicesoftheelephpant language library framework php7 series release opinion install version interview unittest extension api community introduction

All content copyright, 2015 PHPDeveloper.org :: info@phpdeveloper.org - Powered by the Solar PHP Framework