[libunwind] [SEH] Sync LSDA and handler between unw_proc_info_t and DISPATCHER_CONTEXT
For normal C++ unwinding, we get _dispContext initialized by the
prepopulated DISPATCHER_CONTEXT in _GCC_specific_handler, which
we set with __unw_seh_set_disp_ctx.
When doing force unwinding, we step and populate the unw_proc_info_t
struct _info with getInfoFromSEH, but when we execute the handler
via the __libunwind_seh_personality wrapper function, we execute
the handler set in DISPATCHER_CONTEXT.
Whenever updating these fields in either _info or _dispContext,
sync them to the other one too.
This fixes one aspect of the libcxxabi force_unwind*.pass.cpp tests on
x86_64.
Differential Revision: https://reviews.llvm.org/D147637
GitOrigin-RevId: 87ca04033c1bf79f4de964505dd8818cbbc2bdf4
1 file changed
