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

NAME
tapset::pstrace - systemtap pstrace tapset
DESCRIPTION
pstrace Chain of processes and pids back to init(1) See function::pstrace(3stap) for details.
SEE ALSO
function::pstrace(3stap), stap(1), stapprobes(3stap)