[PATCH] D137666: [msan] Increase size of app/shadow/origin mappings on aarch64

[Thurston Dang via Phabricator via llvm-commits]

thurston created this revision.
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The app memory mappings for aarch64 are limited to 64GB, sometimes smaller in practice. This leads to a crash with the error message "MemorySanitizer can not mmap the shadow memory." (because an "invalid" region cannot be mapped).

This patch makes the app/shadow/origin memory mappings considerably larger, along with corresponding changes to the MEM_TO_SHADOW and SHADOW_TO_ORIGIN constants.

      

Note that this deprecates compatibility with 39- and 42-bit VMAs.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D137666

Files:
  compiler-rt/lib/msan/msan.h
  llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp

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