Manual: killsnoop.bt

killsnoop.bt(8)					   System Manager's Manual				     killsnoop.bt(8)

NAME
       killsnoop.bt - Trace signals issued by the kill(),tkill(),tgkill() syscall.  Uses bpftrace/eBPF.

SYNOPSIS
       killsnoop.bt

DESCRIPTION
       killsnoop  traces  the  kill(),tkill(),tgkill()	syscall, to show signals sent via this method. This may be useful to
       troubleshoot failing applications, where an unknown mechanism is sending signals.

       This works by tracing the kill(),tkill(),tgkill() syscall tracepoints.

       Since this uses BPF, only the root user can use this tool.

REQUIREMENTS
       CONFIG_BPF and bpftrace.

EXAMPLES
       Trace all kill(),tkill(),tgkill() syscalls:
	      # killsnoop.bt

FIELDS
       TIME   Time of the kill call.

       PID    Source process ID

       COMM   Source process name

       SIG    Signal number or name. See signal(7).

       TPID   Target process ID

       RESULT Result. 0 == success, a negative value (of the error code) for failure.

OVERHEAD
       This traces the kernel kill function and prints output for each event. As the rate of this is generally	expected  to
       be  low	(< 100/s), the overhead is also expected to be negligible. If you have an application that is calling a very
       high rate of kill()|tkill()|tgkill()s for some reason, then test and understand overhead before use.

SOURCE
       This is from bpftrace.

	      https://github.com/bpftrace/bpftrace

       Also look in the bpftrace distribution for a companion _examples.txt file containing example usage, output, and	com‐
       mentary for this tool.

       This  is	 a  bpftrace  version of the bcc tool of the same name. The bcc tool may provide more options and customiza‐
       tions.

	      https://github.com/iovisor/bcc

OS
       Linux

STABILITY
       Unstable - in development.

AUTHOR
       Brendan Gregg, Rong Tao

SEE ALSO
       opensnoop.bt(8)

USER COMMANDS						 2018-09-07					     killsnoop.bt(8)