Thread-local storage issue

[Kostik Belousov]

On Thu, Sep 15, 2011 at 10:50:47AM +0800, Thinker K.F. Li wrote:
> Hi Guys,
> 
> I was in trouble for an issue of TLS implementation of FreeBSD.  It is
> an issue of ld-elf.so actually.  If I have a thread-local variable in
> program, the value of the variable is not consistent after an
> dlopen().  For example,
> 
> __thread int var = 50;
> 
> void modify() {
>      var = 100;
> }
> 
> void show() {
>      printf("%d\n", var);
> }
> 
> int main(int argc, char * const *argv) {
>     dlopen(...);
>     modify();
>     show();
> }
> 
> If it is compiled with -fpic, it would print "50" while "100" is
> expected. (-fpic is required for shared objects)
> 
> I have send-pr a patch as
> 
> 	http://www.freebsd.org/cgi/query-pr.cgi?pr=160721
> 
> I need someone to review it.

I already sent the request to re@ to commit the change.
Thanks for the submission.
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