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

NAME
function::task_open_file_handles - The number of open files of the task
SYNOPSIS
task_open_file_handles:long(task:long)
ARGUMENTS
task
task_struct pointer
DESCRIPTION
This function returns the number of open file handlers for the given task.
SystemTap Tapset Reference March 2016 FUNCTION::TASK_OPEN_(3stap)