[clang] [compiler-rt] [llvm] [tsan] Add simulation to TSAN (PR #183200)

[Chris Cotter via cfe-commits]

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ccotter wrote:

I changed the sleep functions to insert a scheduling point. Other APIs that are marked unsupported for now are pthread spin lock, pthread read/write locks, and mutex/cv timed waits. I added TODOs to support these at the top of tsan_simulate.cpp.

https://github.com/llvm/llvm-project/pull/183200