[dmd-internals] changeset 455

[Sean Kelly]

Sure.

On May 1, 2010, at 5:55 AM, Andrei Alexandrescu wrote:

> Since we've been looking into this now and we have a solution in our collective mental caches, is there please a chance to effect this change for this beta? I'm telling you, it is an _important_ step forward in unittesting D programs.
> 
> Thanks!
> 
> Andrei
> 
> On 05/01/2010 01:19 AM, Sean Kelly wrote:
>> On Apr 30, 2010, at 1:40 PM, Steve Schveighoffer wrote:
>>> 
>>> ----- Original Message ----
>>>> From: Sean Kelly<sean at invisibleduck.org>
>>>> 
>>>> On Apr 28, 2010, at 1:25 PM, Andrei Alexandrescu wrote:
>>>> It's not hard to write a segfault handler that
>>>> does this, but it involves doing technically illegal stuff in a signal handler
>>>> (either IO or throwing an exception) so I don't want to make it a built-in
>>>> feature.
>>> 
>>> syscalls are always legal because syscalls exit when signals occur (technically, they aren't even calls, they are software interrupts).  In other words, printf is illegal, write is not.
>> 
>> I think it's a bit more restrictive than that, but you're right.  If it helps, the list of signal-safe functions I use for reference is here:
>> 
>> http://www.opengroup.org/onlinepubs/009695399/functions/xsh_chap02_04.html
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