================
@@ -14690,6 +14690,13 @@ void Sema::FinalizeDeclaration(Decl *ThisDecl) {
}
}
+ // The result of __builtin_counted_by_ref cannot be assigned to a variable.
+ // It allows leaking and modification of bounds safety information.
+ if (IsBuiltinCountedByRef(VD->getInit()))
+ Diag(VD->getInit()->getExprLoc(),
+ diag::err_builtin_counted_by_ref_cannot_leak_reference)
+ << VD->getInit()->getSourceRange();
----------------
Sirraide wrote:
I was going to comment on that too, but ended up forgetting about it; it’s used
in like 3–4 places, so I personally would prefer making this a helper function.
https://github.com/llvm/llvm-project/pull/116719
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