probing based on kernel source

[Wenji Huang]

Jun Koi wrote:
> Hi,
> 
> Is it possible to probe a place coresponding to a particular line of a
> particular file in Linux kernel souce code? If so, what is the syntax?
> 
> Thanks a lot,
> Jun
See reference
http://sourceware.org/systemtap/langref/

4.2.2 kernel.statement, module().statement
The .statement variant places a probe at the exact spot, exposing those 
local variables that are visible there.

General syntax:

     kernel.statement("func@file:linenumber")
     module("modname").statement("func@file:linenumber")

Example:

     # Refers to the statement at line 2917 within the
     # kernel/sched.c file:
     kernel.statement("*@kernel/sched.c:2917")

Regards,
Wenji