[compiler-rt] [scudo] Use MemMap in BufferPool and RegionPageMap (PR #66788)

[Fabio D'Urso via llvm-commits]

fabio-d wrote:

Thanks! I've split the CL in two parts and uploaded the first part, with the changes we discussed, as #66896

Let's put this CL on hold for now until we land the new one :)


https://github.com/llvm/llvm-project/pull/66788