linux-kernel - Enable tracing only for one function and its children?

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAOZdJXXYPeb90DzGnHr+c7jhfbZA7z7wiYMzDxgMP4nmuoYaiQ@mail.gmail.com>
Date:   Fri, 16 Nov 2018 16:37:55 -0600
From:   Timur Tabi <timur@...nel.org>
To:     lkml <linux-kernel@...r.kernel.org>
Subject: Enable tracing only for one function and its children?

Is there a way to enable ftrace tracing only for one specific function
and all the functions it calls?  Then when the function returns,
disable tracing until the next time?

When I pass the function name only to set_ftrace_filter, it literally
only traces that function, which doesn't help me.  I tried setting
writing "nvidia_ioctl:traceon" to set_ftrace_filter, but that just
gave me an "invalid argument" error.  And even if that did work, I
don't know what function to use for :traceoff.