Windows DLLs and TLS

[Paulo Pinto]

On Monday, 8 October 2012 at 11:44:28 UTC, Jakob Ovrum wrote:
> I have a bug in one of my programs that I find particularly 
> hard to reduce.
>
> I am writing a Windows DLL plugin for the IRC chat client 
> HexChat (aka XChat). Problem is, all TLS variables, regardless 
> of type, appear to be initialized to complete rubbish values. 
> Reading them does not cause an access violation or anything, 
> but the initial values are garbage. I am initializing the 
> runtime using the helpers found in core.sys.windows.dll [1].
>
> I wrote a dummy host application in C mimicking the loading 
> behaviour of HexChat - the TLS variables are initialized 
> correctly in this case, even though the DLL file is exactly the 
> same.
>
> What is it that a host application can do to break the TLS of a 
> D plugin it loads?
>
> [1] http://pastebin.com/rg9uUQMe

Did you already went through this howto?

http://dlang.org/dll.html