[libunwind] [libunwind] Fix execution flow imbalance when using C++ Exceptions (PR #165066)

[Oliver Hunt via cfe-commits]

https://github.com/ojhunt requested changes to this pull request.

There needs to be a better approach to determining how many frames to skip. My intuition is that the easiest way would be to walk up the stack until you find one of the initial entry points. That's annoying, but doable.

https://github.com/llvm/llvm-project/pull/165066