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!
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