Обсуждение: Re: Win32 signal code - first try

Magnus Hagander wrote:
> If we are uncertain about delivering signals on an APC (with longjmp
> considerations etc), we could even just do our QueueUserAPC() on a
<snip>

This started to get me really concerned, so I did a fair bit of googling
on the subject.  AFIK, we are probably ok longjmp-ing out of a callback
issued by QueueUserAPC.  There are three mitigating factors wrt longjmp
& QueueUserAPC:

1. The callback runs on the same thread as the backend/signal routine
2. the signal is called/raised at the 'end' of the callback
3. there is very little stack involved.

Here is a link which has some technical info about windows messaging and
process control (courtesy of HP):
http://www.cag.lcs.mit.edu/dynamorio/doc/DynamoRIO.htm

Merlin