[compiler-rt] [TySan] Intercept malloc_size on Apple platforms. (PR #122133)

[Dan Liew via llvm-commits]

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

Glad you figured out the problem. I think the implementation of `malloc_size` interceptor needs to be a little different to avoid a potential bug.

https://github.com/llvm/llvm-project/pull/122133