Re: [Wikitech-l] Call graph creator applied to MediaWiki and extensions

[bawolff]

Hi,

I think we used to have callgraphs on svn.wikimedia.org (What is
modern day doc.wikimedia.org), but they got disabled ~2012 (See commit
1ce4aab13ce). However, If you're interested in this sort of thing you
could also try generating the doxygen call graphs yourself by setting
CALL_GRAPH = YES (and maybe CALLER_GRAPH = YES) in
maintinance/Doxyfile  and running make doc in maintenance (provided
you had doxygen and graph viz installed).

--
Bawolff

On Wed, Nov 9, 2016 at 11:43 AM, Seb35  wrote:
> Hello,
>
> I wanted to share a recent work I’ve done to better visualise the
> dependencies between classes, with the call graph [1].
>
> For the extension I am currently developping (MediaWikiFarm [2]), I wanted
> to obtain the call graph. First I did it by hand, but then I found a program
> doing the job, phpCallGraph [3], but unfortunately it was unmaintained since
> 2009 (PHP 5.2 era). I did maintenance and it partly works [4], I still have
> issues with the autoloader.
>
> Here are some preliminary results I got: (these are packages without much
> external dependencies due to autoloader issues)
> * Extension:MediaWikiFarm
>
> https://www.mediawiki.org/wiki/File:Call_graph_of_extension_MediaWikiFarm.svg
> * Extension:Math
> https://www.mediawiki.org/wiki/File:Call_graph_of_extension_Math.svg
> * Extension:CentralAuth
>
> https://www.mediawiki.org/wiki/File:Call_graph_of_extension_CentralAuth.svg
> * directory 'includes' of MediaWiki without subdirectories (too big)
>
> https://www.mediawiki.org/wiki/File:Call_graph_of_MediaWiki%E2%80%99s_directory_includes.svg
>
> I plan to improve this software (see README on GitHub), please say if you if
> you are interested by this type of graph and/or interested in contributing.
>
> Thanks,
> Seb35
>
> [1] https://en.wikipedia.org/wiki/Call_graph (the overapproximation of the
> static call graph to be precise)
> [2] https://www.mediawiki.org/wiki/Extension:MediaWikiFarm
> [3] http://phpcallgraph.sourceforge.net
> [4] https://github.com/Seb35/phpcallgraph
>
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> https://lists.wikimedia.org/mailman/listinfo/wikitech-l

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Re: [Wikitech-l] Call graph creator applied to MediaWiki and extensions

[Gergo Tisza]

Sounds like a cool project! If you are not specifically interested in
static graphs, you can also use profilers (XDebug, xhprof) to capture calls
as they happen and display them with KCacheGrind or something similar. That
gives you call graphs which include information like percentage of time
spent in a subgraph and are great for optimization.

Doxygen can also supposedly generate static call graphs, although I don't
know how good it is at it (it's generally not very PHP-friendly).
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[Wikitech-l] Call graph creator applied to MediaWiki and extensions

[Seb35]

Hello,

I wanted to share a recent work I’ve done to better visualise the 
dependencies between classes, with the call graph [1].


For the extension I am currently developping (MediaWikiFarm [2]), I 
wanted to obtain the call graph. First I did it by hand, but then I 
found a program doing the job, phpCallGraph [3], but unfortunately it 
was unmaintained since 2009 (PHP 5.2 era). I did maintenance and it 
partly works [4], I still have issues with the autoloader.


Here are some preliminary results I got: (these are packages without 
much external dependencies due to autoloader issues)

* Extension:MediaWikiFarm

https://www.mediawiki.org/wiki/File:Call_graph_of_extension_MediaWikiFarm.svg
* Extension:Math
https://www.mediawiki.org/wiki/File:Call_graph_of_extension_Math.svg
* Extension:CentralAuth

https://www.mediawiki.org/wiki/File:Call_graph_of_extension_CentralAuth.svg
* directory 'includes' of MediaWiki without subdirectories (too big)

https://www.mediawiki.org/wiki/File:Call_graph_of_MediaWiki%E2%80%99s_directory_includes.svg

I plan to improve this software (see README on GitHub), please say if 
you if you are interested by this type of graph and/or interested in 
contributing.


Thanks,
Seb35

[1] https://en.wikipedia.org/wiki/Call_graph (the overapproximation of 
the static call graph to be precise)

[2] https://www.mediawiki.org/wiki/Extension:MediaWikiFarm
[3] http://phpcallgraph.sourceforge.net
[4] https://github.com/Seb35/phpcallgraph

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