dtrace discuss - Oct 2009 - DTrace and JavaScript

I''m confused about using DTrace to trace JavaScript. Basically, my
confusion is on which side DTrace is executed: the client side or the server
side? because all the scripts I''ve been studying seem executed on the
server side (requiring root privilege). However, javascript executes on the
client side (i.e., browsers). So my question is whether DTrace can monitor
javascript on live product systems?

Thanks!
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Javascript is executed typically within the browser. So you would use  
DTrace on the machine that is running the browser to observe the  
execution. You can run dtrace as non-root user. You just need the  
extra previledges (at least on Solaris its simple to get the required  
previledges) See
http://www.solarisinternals.com/wiki/index.php/DTrace_Topics_Guide#Privileges

JavaScript is now being used on the server side as well. You can debug  
it on the server if it runs on the server side. Yes, you can monitor  
it on live production system.

HTHs

Angelo

On Oct 14, 2009, at 5:34 PM, Paul Li wrote:
> I''m confused about using DTrace to trace JavaScript. Basically, my
> confusion is on which side DTrace is executed: the client side or  
> the server side? because all the scripts I''ve been studying seem  
> executed on the server side (requiring root privilege). However,  
> javascript executes on the client side (i.e., browsers). So my  
> question is whether DTrace can monitor javascript on live product  
> systems?
>
> Thanks!
> -- 
> This message posted from opensolaris.org
> _______________________________________________
> dtrace-discuss mailing list
> dtrace-discuss at opensolaris.org

Angelo,

Thanks for the message! I''ve got another question. I''m going
to trace user interaction with a AJAX Web page. Can DTrace capture such
information as mouse click on or move over a button and keyboard input into a
text field of a form? Basically, I want to know which element a user is
operating on and which event the user triggered.

Thanks again!

Paul
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