[PATCH] Fix _Unwind_Backtrace for libc++abi built with libgcc.

[Jonathan Roelofs]

================
Comment at: src/cxa_personality.cpp:1112
@@ -1106,1 +1111,3 @@
     case _US_VIRTUAL_UNWIND_FRAME:
+        if (is_force_unwinding)
+            return continue_unwind(unwind_exception, context);
----------------
jroelofs wrote:
> jroelofs wrote:
> > can the state ever be set to just _US_FORCE_UNWIND? Also, continue_unwind() takes three parameters now... can you rebase this patch?
> > can the state ever be set to just _US_FORCE_UNWIND?
> Nevermind about that part.
Also, nevermind about the rebase. I see that you've changed the signature of this function in a different patch in the series.

http://reviews.llvm.org/D7031

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