[PATCH] D40754: [sanitizer] 64-bit allocator's PopulateFreeArray partial refactor

[Kostya Kortchinsky via Phabricator via llvm-commits]

cryptoad updated this revision to Diff 125364.
cryptoad added a comment.

Introduce `IsRegionExhausted` that checks if the region has enough room prior
to calling `Mmap` for the user & metadata portions of memory.
Fold all the metadata work in a `if (kMetadataSize)`.


https://reviews.llvm.org/D40754

Files:
  lib/sanitizer_common/sanitizer_allocator_primary64.h

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