Systemtap probe for Signals

[Li Guanglei]

Hi,
   I help Manoj to forward his mail since he had trouble of posting 
onto SystemTap mailinglist.

--->>
Hi,

Find below the updated tapset for signal subsystem. Please lemme know 
your suggestions on the same.



Thanks & Regards,    Manoj
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Manoj S Pattabhiraman, ADTools, Linux on zSeries, Ph : +91 80 51776449 
T/L  92 46951, e-mail: mpattabh@in.ibm.com


Manoj S Pattabhiraman ??:
> 
>  > Hi,
>  >
>  > I just started of with trying systemtap by probing on signal handling.
>  > Those probes are now consolidated under signal.stp.
>  >
>  > (See attached file: signal.stp)
>  >
>  > Please lemme know your suggestions on the same and how to go forward.
>  >
>  > Thanks & Regards,    Manoj
>  > -------------------------------------------------------------------
>  > Manoj S Pattabhiraman, e-mail: mpattabh@in.ibm.com
> 
>  > There are some signal related probes defined in process.stp, they are:
>  > process.signal_send, process.signal_handle, 
> _process.signal_send.part[1-3]
>  >
>  > Should we put all signal related probes(excluding signal related
>  > syscalls) into a separate stp file, say, signal.stp?
>        
>  I wish it would be better to have a separate stp file for signal 
> subsystem.        
>  
>  > some comments of your stp script:
>  
>  > You defined:
>  >   probe signal.sendsig = kernel.function("send_signal")
>  > But should we include kernel.function("send_group_sigqueue") and
>  > kernel.function("send_sigqueue") into signal.sendsig?
> 
> Looking at these functions, will let you know.
> 
>  > I don't think "probe signal.ignored" matches what it states in the
>  > comment. It's used to return the status whether a signal has been
>  > ignored. There is a similar function named is_ignored.
> 
> Accepted. I would rather add a return probe point for the above 
> mentioned function. Is that fine.
> 
> Thanks
> 
> Manoj

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