Provided by: systemtap-doc_2.3-1ubuntu1.4_all 

NAME
probe::signal.flush - Flushing all pending signals for a task
SYNOPSIS
signal.flush
VALUES
name
Name of the probe point
sig_pid
The PID of the process associated with the task performing the flush
pid_name
The name of the process associated with the task performing the flush
task
The task handler of the process performing the flush
SystemTap Tapset Reference March 2016 PROBE::SIGNAL.FLUS(3stap)