[clang] Thread Safety Analysis: Support attributes on function pointers (PR #191187)

[Aaron Ballman via cfe-commits]

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@@ -436,10 +436,24 @@ static void checkAttrArgsAreCapabilityObjs(Sema &S, Decl *D,
   }
 }
 
+/// Checks that thread-safety attributes on variables or fields apply only to
+/// function pointer types.
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AaronBallman wrote:

Btw, I expect this will be somewhat frustrating in C++; I think users would reasonably expect this to work through smart pointers, `std::function`, etc.

https://github.com/llvm/llvm-project/pull/191187