Provided by: systemtap-doc_2.9-2ubuntu2_all 

NAME
function::tid - Returns the thread ID of a target process
SYNOPSIS
tid:long()
ARGUMENTS
None
DESCRIPTION
This function returns the thread ID of the target process.
SEE ALSO
tapset::context(3stap)
SystemTap Tapset Reference April 2016 FUNCTION::TID(3stap)