[OT] Re: Windows DLLs and TLS

[Rainer Schuetze]

On 10/8/2012 8:13 PM, Denis Shelomovskij wrote:
> 08.10.2012 21:47, Rainer Schuetze пишет:
>> Implicite TLS for dynamically loaded DLLs is
>> not supported by XP or Sever 2003, so druntime contains a fix to
>> simulate it. (The workaround has the drawback that the DLL cannot be
>> unloaded anymore.)
>>
>> I'm just speculating, maybe something goes wrong with the tls_index
>> variable, reading TLS variables would then access data from another DLL.
>>
>> Is your code doing callbacks into the host application in static
>> initializers? With the XP workaround, the runtime initialization
>> "impersonates" all threads that exist before loading the DLL, by
>> switching the TLS-pointer array of the current thread, and that might be
>> unexpected in a callback (but not doing this might produce even more
>> unexpected results).
>
> Here you are! Just want to mention that I'm currently managed to publish
> my (continuation of your) TLS fix I did half a year before. It will
> finally solve this XP/Sever 2003 problem. It is available here but isn't
> finished now (fill be in few days):
> https://github.com/denis-sh/hooking/tree/master/tlsfixer

Will this fix both issues (not being able to unload and that imperfect 
simulation of DLL_THREAD_ATTACH for existing threads)? That would be 
very cool.

>
> I hope you aren't against it is based on your work?
>

Sure, no problem. It's boost licensed, isn't it? ;-)