[Bug sanitizer/77982] deadlock in asan thread initialization/interception.

[pawel_sikora at zoho dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77982

--- Comment #12 from Pawel Sikora <pawel_sikora at zoho dot com> ---
(In reply to Maxim Ostapenko from comment #11)
> Created attachment 39882 [details]
> Untested fix
> 
> Untested fix (works for me with attached testcase).
> 

this fix works for me. thanks.