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

NAME
function::umodname - Returns the (short) name of the user module.
SYNOPSIS
umodname:string(addr:long)
ARGUMENTS
addr
User-space address
DESCRIPTION
Returns the short name of the user space module for the current task that that the given address is part
of. Reports an error when the address isn't in a (mapped in) module, or the module cannot be found for
some reason.
SystemTap Tapset Reference March 2016 FUNCTION::UMODNAME(3stap)