================
@@ -180,8 +197,13 @@ unwind_phase2(unw_context_t *uc, unw_cursor_t *cursor,
_Unwind_Exception *except
// uc is initialized by __unw_getcontext in the parent frame. The first stack
// frame walked is unwind_phase2.
unsigned framesWalked = 1;
-#ifdef _LIBUNWIND_USE_CET
+#if defined(_LIBUNWIND_USE_CET)
unsigned long shadowStackTop = _get_ssp();
+#elif defined(_LIBUNWIND_USE_GCS)
+ unsigned long shadowStackTop = 0;
+ if (__chkfeat(_CHKFEAT_GCS)) {
+ shadowStackTop = (unsigned long)__gcspr();
----------------
MaskRay wrote:
the brace can be dropped
https://github.com/llvm/llvm-project/pull/99335
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