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

[Anatoly Trosinenko via llvm-commits]

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@@ -1974,6 +1994,17 @@ bool UnwindCursor<A, R>::getInfoFromCompactEncodingSection(pint_t pc,
         personalityIndex * sizeof(uint32_t));
     pint_t personalityPointer = sects.dso_base + (pint_t)personalityDelta;
     personality = _addressSpace.getP(personalityPointer);
+#if __has_feature(ptrauth_calls)
+    // The GOT for the personality function was signed address authenticated.
+    // Resign is as a regular function pointer.
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atrosinenko wrote:

[nit] Typo?
```suggestion
    // Resign it as a regular function pointer.
```

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