On 10/18/21 05:45, Dongliang Mu 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? If this user process is run on different
processors, traces of this process on different processors should be
also recorded.
I think, kernel is not supposed to do that kind of things. I mean, there
is no such wrapper in the kernel to do this task, AFAIK.
You have an access to all system calls, so you can implement your own
gdb in the kernel via ptrace() :)
If you need only report about instructions, you can call `perf record` +
`perf report` via call_usermodehelper() and somehow parse the output of
these helpers.
Any comment is welcome.
With regards,
Pavel Skripkin
_______________________________________________
Kernelnewbies mailing list
Kernelnewbies@kernelnewbies.org
https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies