Provided by: systemtap-doc_3.1-3ubuntu0.1_all 

NAME
function::user_ulong_warn - Retrieves an unsigned long value stored in user space
SYNOPSIS
user_ulong_warn:long(addr:long)
ARGUMENTS
addr
the user space address to retrieve the unsigned long from
DESCRIPTION
Returns the unsigned long value from a given user space address. Returns zero when user space and warns
(but does not abort) about the failure. Note that the size of the unsigned long depends on the
architecture of the current user space task (for those architectures that support both 64/32 bit compat
tasks).
SEE ALSO
tapset::uconversions(3stap)
SystemTap Tapset Reference March 2016 FUNCTION::USER_ULONG(3stap)