[clang] Warning Libc functions (PR #101583)

[Artem Dergachev via cfe-commits]

================
@@ -2292,6 +2292,18 @@ class UnsafeBufferUsageReporter : public UnsafeBufferUsageHandler {
     }
   }
 
+  void handleUnsafeLibcCall(const CallExpr *Call, unsigned PrintfInfo,
+                            ASTContext &Ctx) override {
+    // We have checked that there is a direct callee with an identifier name:
+    StringRef Name = Call->getDirectCallee()->getName();
+
+    S.Diag(Call->getBeginLoc(), diag::warn_unsafe_buffer_libc_call)
+        << Name << Call->getSourceRange();
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haoNoQ wrote:

Just pass `const Decl *D = Call->getDirectCallee()` directly into `S.Diag()`. It even automatically adds quotes around the name this way.

https://github.com/llvm/llvm-project/pull/101583