[dmd-internals] changeset 455

[Andrei Alexandrescu]

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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