function::user_buffer_quoted_error.3stap man page

function::user_buffer_quoted_error ā€” Retrieves and quotes buffer from user space

Synopsis

    user_buffer_quoted_error:string(addr:long,inlen:long,outlen:long)

Arguments

addr

the user space address to retrieve the buffer from

inlen

the exact length of the buffer to read

outlen

the maximum length of the output string

Description

Reads inlen characters of a buffer from the given user space memory address, and returns up to outlen characters, where any ASCII characters that are not printable are replaced by the corresponding escape sequence in the returned string. Note that the string will be surrounded by double quotes. On the rare cases when user space data is not accessible at the given address, an error is thrown.

See Also0

tapset::uconversions(3stap)

Info

November 2019 SystemTap Tapset Reference String and data retrieving fun