Switch the destructors implementation for thread locals on Windows to use FLS - #148799

Merged

rust-bors[bot] merged 9 commits into

rust-lang:mainfrom

ohadravid:windows-thread-local-dtors-using-fls

Jun 3, 2026

Commits on May 26, 2026

Added Windows bindings for FLS-related functions
ohadravid
committed
10e1030
Replace `thread_local::guard` on Windows with an FLS-based impl
ohadravid
committed
b5958a9
Add support for the `Fls{Alloc,GetValue,SetValue}` functions in miri
ohadravid
committed
4c34d61
Update Miri's FLS impl to clear the key's value after running it's destructor
ohadravid
committed
490e4ec
Free FLS key used by `thread_local::guard` during DLL unload to avoid access violation
ohadravid
committed
1142cfb
Only track cleanup registration when `target_thread_local`
ohadravid
committed
5581572

Commits on May 27, 2026

Return early in `thread_local::guard` once `atexit` has been called
ohadravid
committed
99f4605
rtabort on `atexit` registration failure
ohadravid
committed
435bed0

Commits on Jun 2, 2026

Prevent races between `thread_local::guard` and `atexit` using a dedicated struct
ohadravid
committed
336dc57