dtrace discuss - Dec 2008 - examining of DTRACE return arguments in case of pass_by_value

Hello,

I am using PID provider and some of my programs have pass_by_value (in other
words, when the function returns, I expect changes values to the arguments).

I would like to examine those arguments via DTRACE. 

Can some one point me to the pages where I may be able to print not only the
return value of the function but also the returned arguments, please?

Thanks
Aurn B.
-- 
This message posted from opensolaris.org

Arun Bharatam writes:
> I am using PID provider and some of my programs have pass_by_value (in
other words, when the function returns, I expect changes values to the
arguments).
Isn''t that the definition of "pass by reference" ... ?
> I would like to examine those arguments via DTRACE. 
> 
> Can some one point me to the pages where I may be able to print not only
the return value of the function but also the returned arguments, please?
Use an :entry clause to save off the original argument pointers in a
self-> variable, then do a copyin using that in your :return clause.

-- 
James Carlson, Solaris Networking              <james.d.carlson at
sun.com>
Sun Microsystems / 35 Network Drive        71.232W   Vox +1 781 442 2084
MS UBUR02-212 / Burlington MA 01803-2757   42.496N   Fax +1 781 442 1677

Thanks James.

Yes, my question was indeed regarding ''pass by reference''. 
Your suggestion worked.
 -- Regards
Arun B
-- 
This message posted from opensolaris.org