[libc-commits] [libc] add mremap (PR #112804)

[Schrodinger ZHU Yifan via libc-commits]

https://github.com/SchrodingerZhu requested changes to this pull request.

Thanks for contributing to libc! This PR looks like a great start point. I quickly scanned the code and spot some formatting issues. Could you please correct them? Thank you!

I will look deeper into the code and logic later.

https://github.com/llvm/llvm-project/pull/112804