[compiler-rt] [libcxxabi] [libunwind] [runtimes][PAC] Harden unwinding when possible (#138571) (PR #143230)

[Anatoly Trosinenko via cfe-commits]

================
@@ -47,10 +47,11 @@ struct _LIBCXXABI_HIDDEN __cxa_exception {
     // In Wasm, a destructor returns its argument
     void *(_LIBCXXABI_DTOR_FUNC *exceptionDestructor)(void *);
 #else
-    void (_LIBCXXABI_DTOR_FUNC *exceptionDestructor)(void *);
+    void(_LIBCXXABI_DTOR_FUNC* __ptrauth_cxxabi_exception_destructor
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atrosinenko wrote:

[nit] Missing space after `void`: `void (_LIBCXXABI_DTOR_FUNC* ...`

https://github.com/llvm/llvm-project/pull/143230
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