Systemtap probe for Signals

[Li Guanglei]

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?

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?

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.

Thanks.

- Guanglei