[libunwind] [SEH] Clear DISPATCHER_CONTEXT when initializing a cursor
We only initialize a few fields in DISPATCHER_CONTEXT - don't leave
the rest in an uninitialized state; make sure the whole struct is
in a deterministic state.
This makes nondeterministic failures deterministic, for some cases
relating to forced unwinding on aarch64/arm (which requires filling
in parsing of the xdata for finding the exception handler and LSDA).
Differential Revision: https://reviews.llvm.org/D148660
GitOrigin-RevId: f6320f5e0e63268049086d17e903ee9bc80a996d
1 file changed
