Provided by:
systemtap-doc_0.0.20090214-1ubuntu1_all 
NAME
probe_signal.procmask - Initiates a trace when a thread is about to
examine and change blocked signals
SYNOPSIS
probe signal.procmask
VALUES
how
Indicates how to change the blocked signals; possible values are
<command>SIG_BLOCK=0</command> (for blocking signals),
<command>SIG_UNBLOCK=1</command> (for unblocking signals), and
<command>SIG_SETMASK=2</command> for setting the signal mask.
oldsigset_addr
The old address of the signal set (<command>sigset_t</command>)
sigset
The actual value to be set for <command>sigset_t</command>
<remark>(correct?)</remark>
sigset_addr
The address of the signal set (<command>sigset_t</command>) to be
implemented
SYNOPSIS
<programlisting>int sigprocmask(int how, sigset_t *set, sigset_t
*oldset)</programlisting>
AUTHOR
William Cohen <wcohen@redhat.com>