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FUNCTION::USER_STRIN(3stap) String and data retrieving fun FUNCTION::USER_STRIN(3stap)

NAME

function::user_string_n_warn - Retrieves string from user space

SYNOPSIS

    user_string_n_warn:string(addr:long,n:long)

ARGUMENTS

addr
the user space address to retrieve the string from
n
the maximum length of the string (if not null terminated)

DESCRIPTION

Returns up to n characters of a C string from a given user space memory address. Reports “<unknown>” on the rare cases when userspace data is not accessible and warns (but does not abort) about the failure.
November 2014 SystemTap Tapset Reference