[PATCH] D61214: [scudo][standalone] Add the memory reclaiming mechanism

[Kostya Kortchinsky via Phabricator via llvm-commits]

cryptoad created this revision.
cryptoad added reviewers: eugenis, vitalybuka, morehouse, hctim.
Herald added subscribers: Sanitizers, delcypher, mgorny, srhines.
Herald added projects: LLVM, Sanitizers.

This CL implements the memory reclaiming function `releaseFreeMemoryToOS`
and its associated classes. Most of this code was originally written by
Aleksey for the Primary64 in sanitizer_common, and I made some changes to
be able to implement 32-bit reclaiming as well. The code has be restructured
a bit to accomodate for freelist of batches instead of the freearray used
in the current sanitizer_common code.


Repository:
  rCRT Compiler Runtime

https://reviews.llvm.org/D61214

Files:
  lib/scudo/standalone/CMakeLists.txt
  lib/scudo/standalone/release.h
  lib/scudo/standalone/size_class_map.h
  lib/scudo/standalone/tests/CMakeLists.txt
  lib/scudo/standalone/tests/map_test.cc
  lib/scudo/standalone/tests/release_test.cc

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