BStott6 wrote:

> I appreciate the effort you've put into this @BStott6; are you using 
> `atomic_thread_fence` in a way that gives false positives? Perhaps I can try 
> to add support for them in TSan (it looks like someone has a workaround here 
> for now: https://stackoverflow.com/a/70543751)

[This](https://github.com/llvm/llvm-project/issues/52942) issue documents false 
positives when using `atomic_thread_fence`. Supporting it in TSan would be the 
best solution, then this PR can be closed.

https://github.com/llvm/llvm-project/pull/166542
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