function::user_string.3stap man page

function::user_string — Retrieves string from user space

Synopsis

1) user_string:string(addr:long)
2) user_string:string(addr:long,err_msg:string)

Arguments

addr

the user space address to retrieve the string from

err_msg

the error message to return when data isn't available

Description

1) Returns the null terminated C string from a given user space memory address. Reports an error on the rare cases when userspace data is not accessible.

2) Returns the null terminated C string from a given user space memory address. Reports the given error message on the rare cases when userspace data is not accessible.

See Also0

tapset::uconversions(3stap)

Info

March 2016 SystemTap Tapset Reference String and data retrieving fun