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

[Sean McBride via llvm-commits]

seanm wrote:

> @seanm Thanks for checking! Not sure what is going on here exactly, I've not seen this locally myself. Could you file an issue with steps to reproduce?

OK I'll wait until this is merged so as to be using a more proper build of clang.

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