[PATCH] D16098: [cfi] Make the shadow read-only.

[Evgeniy Stepanov via llvm-commits]

eugenis created this revision.
eugenis added reviewers: pcc, kcc.
eugenis added a subscriber: llvm-commits.
eugenis set the repository for this revision to rL LLVM.

Make CFI shadow read-only.
For the updates, prepare new data in a buffer on the side, then,
depending on the platform:
* (Linux) mprotect + mremap into place.
* (non-Linux) remove protection from the target region, copy, restore
  protection, verify contents.


Repository:
  rL LLVM

http://reviews.llvm.org/D16098

Files:
  lib/cfi/cfi.cc
  lib/sanitizer_common/CMakeLists.txt
  lib/sanitizer_common/sanitizer_common.h
  lib/sanitizer_common/sanitizer_posix.cc
  lib/sanitizer_common/sanitizer_readonlyupdate.h
  lib/sanitizer_common/tests/CMakeLists.txt
  lib/sanitizer_common/tests/sanitizer_readonlyupdate_test.cc

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