[D-runtime] Trouble with thread attaching/detaching on Linux

[Sean Kelly]

This looks roughly correct.  I hadn't thought about adding calls to TlsCtor and TlsDtor, though perhaps I should.  Comments inline.

On Jan 20, 2012, at 6:20 AM, Alex wrote:

> Hi,
> 
> (Sorry if this is posted in the wrong place.)
> 
> Consider the following code:
> 
> import core.sys.posix.pthread,
>       core.memory,
>       core.thread,
>       std.stdio;
> 
> extern (C) void rt_moduleTlsCtor();
> extern (C) void rt_moduleTlsDtor();
> 
> __gshared pthread_key_t key;
> 
> static this() { writefln("TLS ctor"); }
> static ~this() { writefln("TLS dtor"); }
> 
> static extern(C) void* threadMain(void *arg)
> {
>    pthread_setspecific(key, cast(void*)0xbadc0de);
> 
>    thread_attachThis();
>    rt_moduleTlsCtor();
> 
>    writefln("Hello from thread");
> 
>    return null;
> }
> 
> private static extern (C) void threadExit(void *cd)
> {
>    writefln("Bye from thread");
> 
>    GC.disable();
>    thread_detachThis();
>    rt_moduleTlsDtor();

You might want to reverse the detach and TlsDtor calls here, since it's possible that static dtors might want access to the current Thread object.