FUNCTION::USER_STRIN(3stString and data retrieving FUNCTION::USER_STRIN(3stap)

NAME function::user_string2_n_warn - Retrieves string from user space with alternative warning string

SYNOPSIS user_string2_n_warn:string(addr:long,n:long,warn_msg:string)

ARGUMENTS addr the user space address to retrieve the string from

n the maximum length of the string (if not null terminated)

warn_msg the warning message to return when data isn´t available

DESCRIPTION Returns up to n characters of a C string from a given user space memory address. Reports the given warning message on the rare cases when userspace data is not accessible and warns (but does not abort) about the failure.

SEE ALSO tapset::uconversions(3stap)

SystemTap Tapset Reference December 2016 FUNCTION::USER_STRIN(3stap)