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

NAME
function::task_uid - The user identifier of the task
SYNOPSIS
task_uid:long(task:long)
ARGUMENTS
task
task_struct pointer
DESCRIPTION
This function returns the user id of the given task.
SystemTap Tapset Reference March 2016 FUNCTION::TASK_UID(3stap)