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

NAME
probe::signal.pending - Examining pending signal
SYNOPSIS
signal.pending
VALUES
sigset_size
The size of the user-space signal set
sigset_add
The address of the user-space signal set (sigset_t)
name
Name of the probe point
DESCRIPTION
This probe is used to examine a set of signals pending for delivery to a specific thread. This normally
occurs when the do_sigpending kernel function is executed.
SystemTap Tapset Reference March 2016 PROBE::SIGNAL.PEND(3stap)