The problem is that this effects higher languages too, because they often build on libc. And on some OSes, they don't have a choice, because the system call int

The problem is that this effects higher languages too, because they often build on libc. And on some OSes, they don't have a choice, because the system call interface is unstable and/or undocumented). For example in rust, multiple time libraries were found to be unsound if `std::env::set_env` was ever called from a multi-threaded program. See: https://github.com/time-rs/time/issues/293 https://github.com/time-rs/time/issues/293 and https://github.com/chronotope/chrono/issues/499 https://github.com/chronotope/chrono/issues/499 https://github.com/rust-lang/rust/issues/27970 https://github.com/rust-lang/rust/issues/27970 https://github.com/rust-lang/rust/issues/90308 https://github.com/rust-lang/rust/issues/90308