tree dd487032bef29946558bf1241f926af0dc898194
parent 083506f224853c0e5c0d972ef60d25d42d769d6a
author Logan Chien <tzuhsiang.chien@gmail.com> 1421933319 +0000
committer Logan Chien <tzuhsiang.chien@gmail.com> 1421933319 +0000

Fix _Unwind_Backtrace for libc++abi built with libgcc.

Implement an undocumented _US_FORCE_UNWIND flag for force
unwinding.


git-svn-id: https://llvm.org/svn/llvm-project/libcxxabi/trunk@226820 91177308-0d34-0410-b5e6-96231b3b80d8