#! /usr/bin/env stap

# Copyright (C) 2006 IBM Corp.
#
# This file is part of systemtap, and is free software.  You can
# redistribute it and/or modify it under the terms of the GNU General
# Public License (GPL); either version 2, or (at your option) any
# later version.

#
# Print signal counts by process name in descending order.
#

global sigcnt, sig2name

probe begin {
	print("Collecting data... Type Ctrl-C to exit and display results\n")
}

probe signal.send 
{
	sigcnt[execname(), pid_name, sig] <<< 1

	if (!(sig in sig2name)) sig2name[sig] = sig_name 
}

probe end
{
	printf("%-16s %-16s %-16s %s\n",
	       "SENDER", "RECEIVER", "SIGNAL", "COUNT")

	foreach ([snd_name, rcv_name, sig_num] in sigcnt-)
		printf("%-16s %-16s %-16s %d\n", 
		       snd_name, rcv_name, sig2name[sig_num],
		       @count(sigcnt[snd_name, rcv_name, sig_num]))
}