register_jprobe always fails with -22

register_jprobe always fails with -22

[Naruto Nguyen]

Hi everyone,

I tried to write a sample jprobe as the link
https://bugzilla.redhat.com/show_bug.cgi?id=1275809 (the sample is
attached in the link). However the function register_jprobes always
return -22 or -2. Could you please let me know what these errors means
and how to fix it?

Thanks,
Brs,
Naruto

Re: register_jprobe always fails with -22

[Steven Rostedt]

On Thu, 4 Jul 2019 16:03:42 +0700
Naruto Nguyen <narutonguyen2018@gmail.com> wrote:

> Hi everyone,
> 
> I tried to write a sample jprobe as the link
> https://bugzilla.redhat.com/show_bug.cgi?id=1275809 (the sample is
> attached in the link). However the function register_jprobes always
> return -22 or -2. Could you please let me know what these errors means
> and how to fix it?
> 

Note, jprobes have been removed from the kernel. They have been
obsoleted by registering with the function tracer.

See Documentation/trace/ftrace-uses.rst in the kernel source code.

-- Steve

Re: register_jprobe always fails with -22

[Steven Rostedt]

On Thu, 4 Jul 2019 16:03:42 +0700
Naruto Nguyen <narutonguyen2018@gmail.com> wrote:

> Hi everyone,
> 
> I tried to write a sample jprobe as the link
> https://bugzilla.redhat.com/show_bug.cgi?id=1275809 (the sample is
> attached in the link). However the function register_jprobes always
> return -22 or -2. Could you please let me know what these errors means
> and how to fix it?


Sorry for the really late reply (6 months!), but this email got lost in
my inbox, and I just noticed it. In case that you are still wondering
about jprobes, they have become obsolete. Registering with the function
tracer is now the way to accomplish this.

 See https://www.kernel.org/doc/Documentation/trace/ftrace-uses.rst

-- Steve

Re: register_jprobe always fails with -22

[Steven Rostedt]

On Mon, 6 Jan 2020 22:41:56 -0500
Steven Rostedt <rostedt@goodmis.org> wrote:

> Sorry for the really late reply (6 months!), but this email got lost in
> my inbox, and I just noticed it. In case that you are still wondering
> about jprobes, they have become obsolete. Registering with the function
> tracer is now the way to accomplish this.
> 
>  See https://www.kernel.org/doc/Documentation/trace/ftrace-uses.rst

And then I find in my inbox that I already replied to this :-P

Sorry for the noise.

(This thread is now archived)

-- Steve