[PATCH] D50564: Add support for SEH unwinding on Windows.

[Charles Davis via Phabricator via cfe-commits]

cdavis5x created this revision.
cdavis5x added reviewers: mstorsjo, rnk, compnerd, smeenai.
Herald added subscribers: cfe-commits, chrib, christof, kristof.beyls, mgorny.
Herald added a reviewer: javed.absar.

I've tested this implementation on x86-64 to ensure that it works. All
`libc++abi` tests pass, as do all `libc++` exception-related tests. ARM
still remains to be implemented (@compnerd?).

Special thanks to KJK::Hyperion for his excellent series of articles on
how EH works on x86-64 Windows. (Seriously, check it out. It's awesome.)

I'm actually not sure if this should go in as is. I particularly don't
like that I duplicated the UnwindCursor class for this special case.


Repository:
  rUNW libunwind

https://reviews.llvm.org/D50564

Files:
  include/__libunwind_config.h
  src/AddressSpace.hpp
  src/CMakeLists.txt
  src/Unwind-seh.cpp
  src/UnwindCursor.hpp
  src/UnwindLevel1-gcc-ext.c
  src/UnwindLevel1.c
  src/config.h
  src/libunwind_ext.h

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