[PATCH] [Windows] Implementing backtracing of self

[Zachary Turner]

================
Comment at: lib/Support/Windows/Signals.inc:388
@@ +387,3 @@
+
+  STACKFRAME64 StackFrame;
+  jmp_buf Buffer;
----------------
rnk wrote:
> Zero StackFrame so we don't give uninitialized memory to the unwinder.
Thanks, I missed that.  That led me to find one more improvement, which is that we can set the value of StackFrame.ReturnAddr to _GetReturnAddress().  I don't know how much it'll help, but it certainly won't hurt, so I'll submit the patch with your suggested improvement as well the one to set StackFrame.AddrReturn.

http://reviews.llvm.org/D8068

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