dtrace discuss - Dec 2006 - How to use DTrace to find out List of modules accessed by an application

HI,
    I need to develop an application that finds out the number of modules
accessed by an application, or the number of applications accessing a module
usin DTrace.
I request help in regard to this...

thanks and regards,
Arun DK
 
 
This message posted from opensolaris.org

By "modules", you mean dynamic libraries or kernel modules??

Rayson


On 12/14/06, Arun <dkarun at gmail.com> wrote:
> HI,
>    I need to develop an application that finds out the number of modules
accessed by an application, or the number of applications accessing a module
usin DTrace.
> I request help in regard to this...
>
> thanks and regards,
> Arun DK
>
>
> This message posted from opensolaris.org
> _______________________________________________
> dtrace-discuss mailing list
> dtrace-discuss at opensolaris.org
>

Let me see if I understand correctly: you''d like to be able to tell
what
shared objects a process is actively using (rather than those to which
it''s linked), _and_ you''d like to see what processes are
actively calling
functions in a given shared object (and not just which applications link
to it). Is that right?

Adam

On Wed, Dec 13, 2006 at 09:04:40PM -0800, Arun wrote:
> HI,
>     I need to develop an application that finds out the number of modules
accessed by an application, or the number of applications accessing a module
usin DTrace.
> I request help in regard to this...
> 
> thanks and regards,
> Arun DK
>  
>  
> This message posted from opensolaris.org
> _______________________________________________
> dtrace-discuss mailing list
> dtrace-discuss at opensolaris.org
-- 
Adam Leventhal, Solaris Kernel Development       http://blogs.sun.com/ahl

Exactly, take an example as a Perl Module, so the need is to find out the
applications accessing a particular perl module, and the Perl modules accessed
by a particular application...
 
 
This message posted from opensolaris.org

I meant shared modules...
 
 
This message posted from opensolaris.org

Do you actually need to know what processes are making calls to functions
in the shared object or would it be sufficient to know which processes had
the shared object open in their address spaces?

Adam

On Wed, Dec 13, 2006 at 09:22:07PM -0800, Arun wrote:
> Exactly, take an example as a Perl Module, so the need is to find out the
applications accessing a particular perl module, and the Perl modules accessed
by a particular application...
>  
>  
> This message posted from opensolaris.org
> _______________________________________________
> dtrace-discuss mailing list
> dtrace-discuss at opensolaris.org
-- 
Adam Leventhal, Solaris Kernel Development       http://blogs.sun.com/ahl

I need to know what processes are making calls to functions
in the shared object...
 
 
This message posted from opensolaris.org

At present, DTrace can help you figure out the modules that a process is
using:

# dtrace -n ''pid123:::entry{ @[probemod] = count(); }''

But I can''t think of a simple way to tell what processes are using a
give
shared object using DTrace. I''d probably put something together that
uses
/proc/<pid>/pagedata (see proc(4)). It wouldn''t be impossible to
extend
DTrace to solve this. Would you use this information for some larger
purpose or is this the actual question you''re trying to answer?

Adam

On Wed, Dec 13, 2006 at 10:33:29PM -0800, Arun wrote:
> I need to know what processes are making calls to functions
> in the shared object...
>  
>  
> This message posted from opensolaris.org
> _______________________________________________
> dtrace-discuss mailing list
> dtrace-discuss at opensolaris.org
-- 
Adam Leventhal, Solaris Kernel Development       http://blogs.sun.com/ahl

Yes I wanted this question tp be answered, will explore on the second one (
processes using a module) and come back for help..
Thanks a lot for the help extended...
 
 
This message posted from opensolaris.org