[PATCH] D56621: [hwasan] Madvise away thread aux data

[Evgenii Stepanov via Phabricator via llvm-commits]

eugenis added a comment.

This one is hard to test reliably for RSS change, because it only affect thread exit, and, generally, we don't know how much memory the platform thread support would release in that event, and it might even be a different amount for different threads (some kind of stack caching, etc).

We don't rely on ReleaseMemoryPagesToOS clearing memory here, so this an almost side-effect-free optimization.

PTAL.


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