Re: Some experience with the igc branch

[Helmut Eller <eller.helmut@gmail.com>]

On Wed, Dec 25 2024, Gerd Möllmann wrote:

> Pip Cet <pipcet@protonmail.com> writes:
>
>> I don't think that's the problem.  The problem is that signals can
>> interrupt MPS, on all platforms.
[...]
> And I don't think that's right :-). It's completely right that in the
> SIGPROF handler everything can be inconsistent. That's true both for MPS
> and Emacs. For example, the bindings stack (specpdl) may be inconsistent
> when SIGPROF arrives. Literally everything we do in the SIGPROF runs the
> risk of encountering inconsistencies.

The SIGPROF handler copies part of the potentially inconsistent state to
the profiler log.  That same potentially inconsistent profiler log is
used later, outside the signal handler.  Sounds like a problem to me.
Is it not?  Or is the probability for inconistencies being copied so low
that we ignore it?

Helmut