Any tracing mechanism can track the executed instructions of a user process in the kernel?

[Aruna Hewapathirane]

On Sun, Oct 17, 2021 at 10:46 PM Dongliang Mu <mudongliangabcd at gmail.com>
wrote:

> Hi all,
>
> I am writing to kindly ask one question: is there any tracing
> mechanism in Linux kernel that can trace all the executed instructions
> of a user process?


Use gdb -p <pid> to attach to the process your interested in
The gdb command: display/i $pc shows you the instruction before it
executes. display $pc shows the line of code before n or s executes it.


> If this user process is run on different
> processors, traces of this process on different processors should be
> also recorded.
>

This am not too sure about, someone more knowledgeable will  probably let
us know ( Valdis ? )

>
> Any comment is welcome.
>
> --
> My best regards to you.
>
>      No System Is Safe!
>      Dongliang Mu
>
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