Hi Valentin,
It is something that would be interesting and useful, but a lot of work would
be needed to have stack-walking this is fast enough and reentrant wrt signal
handlers. Unfortunately, the backtrace(3) functions do not meet those
requirements.
Also, for gathering user-space callstacks from the kernel tracer, it only works if
all user-space is compiled with frame pointers. This is also a limitation that would
require a lot of work to overcome neatly.
None of those features are currently on any roadmap due to lack of customers
showing interest in getting this done.
Thanks,
Mathieu