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Date: Tue, 14 Jul 2009 15:52:37 -0700
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To: David Soria Parra <david.soriaparra@sun.com>
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Subject: Re: [PHP-DEV] Patch and RFC for adding DTrace probes to PHP
From: sriram.natarajan@gmail.com (Sriram Natarajan)

David
 I have been talking with some Drupal users and some of them showed lot 
of interest to be able to print out the function arguments as well as 
part of DTrace function-entry probes.

- Sriram

David Soria Parra wrote:
> Hi List,
>
> in the last months I worked on adding DTrace probes to PHP and would
> like to start a discussion about the RFC and patch against trunk
> that can be found at:
>
>  http://wiki.php.net/rfc/dtrace
>
> DTrace is a dynamic tracing framework for Solaris, OpenSolaris, Mac OSX
> and FreeBSD that can be used to trace running applications on a system
> based on instrumentation points in the kernel and the application. The
> patch aims to include static probes into PHP which will better reflect
> PHP execution from a user persective. At the moment PHP can only be
> traced with deep knowledge of the executor and it's functions.
>
> The patch is based on recent trunk and can be found at:
>
>  http://patches.experimentalworks.net/dtrace.patch
>
> In the current state the patch introduces a wrapper for the current
> executor to fire function-entry probes. It was mentioned that it might
> be useful to not use an own funciton for that. As I want to make things
> cleaner for the current state of review, I decided to use a separate
> function.
>
> The patch was tested on Mac OS 10.5, Solaris 10 and OpenSolaris 2009.06.
>
> David
>
>