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

NAME
probe::stapio.receive_control_message - Received a control message
SYNOPSIS
stapio.receive_control_message
VALUES
type
type of message being send; defined in runtime/transport/transport_msgs.h
len
the length (in bytes) of the data blob
data
a ptr to a binary blob of data sent as the control message
DESCRIPTION
Fires just after a message was receieved and before it's processed.
SystemTap Tapset Reference March 2016 PROBE::STAPIO.RECE(3stap)