On 11/8/22 18:46, Frank Ch. Eigler wrote:
Demi Marie Obenour <demiobenour(a)gmail.com> writes:
> Three other options I can think of:
> [...]
Another one:
4. Speed up out-of-context backtracer(s), possibly consuming
kernel-perf-ringbuffer stack dumps, or possibly using another
event source to trigger and work via ptrace and /proc/$pid/mem
- FChE
Kernel stack dumps will not work for programs (such as OCaml 5.0)
that use segmented stacks. A userspace ptracer might work if it
is only woken up when absolutely necessary, but I suspect it would
be slow due to syscall overhead. That is why I suggested the vDSO
dumper: it would run from the process’s own context.
--
Sincerely,
Demi Marie Obenour (she/her/hers)