[issue33955] Implement PyOS_CheckStack on macOS using pthread_get_stack*_np

[Dong-hee Na]

Dong-hee Na <donghee.na92 at gmail.com> added the comment:

@ronaldoussoren

I updated the PR and we need some discussion.
I benchmarked new patch with Fibonacci codes.

baseline(master): 21.330535484 
without call sysctlbyname(PR 8046): 22.857963209 secs
with call sysctlbyname(PR 8046): 37.125129114 secs

So my choice is just believe pthread_get_stacksize_np() like rust do. (https://github.com/rust-lang/rust/blob/master/src/libstd/sys/unix/thread.rs#L246)

code:

def fib(n):
    if n == 0:
        return 0
    if n == 1:
        return 1
    return fib(n-2) + fib(n-1)

if __name__ == '__main__':
    import timeit
    print(timeit.timeit("fib(10)", setup="from __main__ import fib"))

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