function::user_string_n_warn
Retrieves string from user space
- Provided by: systemtap-doc (Version: 2.3-1ubuntu1.4)
- Source: systemtap
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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.