[PATCH] Protection against stack-based memory corruption errors using SafeStack: compiler-rt runtime support library

[Peter Collingbourne]

- Add more overflow checks; add detailed documentation of limitations (from Laszlo)


http://reviews.llvm.org/D6096

Files:
  CMakeLists.txt
  cmake/config-ix.cmake
  lib/CMakeLists.txt
  lib/safestack/CMakeLists.txt
  lib/safestack/safestack.cc
  test/CMakeLists.txt
  test/safestack/CMakeLists.txt
  test/safestack/buffer-copy-vla.c
  test/safestack/buffer-copy.c
  test/safestack/init.c
  test/safestack/lit.cfg
  test/safestack/lit.site.cfg.in
  test/safestack/lto.c
  test/safestack/overflow.c
  test/safestack/pthread-cleanup.c
  test/safestack/pthread.c
  test/safestack/utils.h

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