Re: kprobe on local function

[Nam Cao]

On Sat, Jan 25, 2025 at 01:16:55AM +0900, Masami Hiramatsu wrote:
> Now what you could know is that the kernel does not call the
> "rt_mutex_slowunlock" symbol and it may call another copied symbol. That's
> a good to know right?
> 
> Note that this in-kernel kretprobe API is a low-layer API, so that user is
> responsible for controlling it carefully. This kretprobe API itself does NOT
> know which copy of the optimized symbols are used.
> (there could be inlined instance too)
> 
> If you need to know how many copies are generated or inlined, you need to
> use the debuginfo as "perf probe" tool does, which can not handled by the
> kernel itself because it is too big to be loaded. That is why I made the
> "perf probe" as an external tool.

Got it, thanks so much for the information!

Best regards,
Nam