Re: Elisp native profiler

[Paul Eggert]

On 09/25/2012 10:28 AM, Stefan Monnier wrote:
> while it runs non-trivial code, it doesn't make any
> system-call or anything like that

But there are races if the SIGPROF handler runs in
some other thread, no?  That bug could be worked around
by using thread-specific timers (which are available
in recent GNU/Linux but not older versions or in other
POSIXish platforms).  More portably, albeit more slowly,
the SIGPROF handler could use deliver_process_signal,
like the other handlers of process signals.

A lesser question: why does the profiler use SA_SIGINFO?
It doesn't seem to use the extra info that SA_SIGINFO delivers.