[clang] [attributes][-Wunsafe-buffer-usage] Support adding unsafe_buffer_usage attribute to struct fields (PR #101585)

[Malavika Samak via cfe-commits]

================
@@ -926,22 +926,27 @@ class CArrayToPtrAssignmentGadget : public FixableGadget {
 /// A call of a function or method that performs unchecked buffer operations
 /// over one of its pointer parameters.
 class UnsafeBufferUsageAttrGadget : public WarningGadget {
-  constexpr static const char *const OpTag = "call_expr";
-  const CallExpr *Op;
+  constexpr static const char *const OpTag = "attr_expr";
+  const Expr *Op;
 
 public:
   UnsafeBufferUsageAttrGadget(const MatchFinder::MatchResult &Result)
       : WarningGadget(Kind::UnsafeBufferUsageAttr),
-        Op(Result.Nodes.getNodeAs<CallExpr>(OpTag)) {}
+        Op(Result.Nodes.getNodeAs<Expr>(OpTag)) {}
 
   static bool classof(const Gadget *G) {
     return G->getKind() == Kind::UnsafeBufferUsageAttr;
   }
 
   static Matcher matcher() {
+    auto HasUnsafeFielDecl =
+        member(fieldDecl(hasAttr(attr::UnsafeBufferUsage)));
+
     auto HasUnsafeFnDecl =
         callee(functionDecl(hasAttr(attr::UnsafeBufferUsage)));
-    return stmt(callExpr(HasUnsafeFnDecl).bind(OpTag));
+
+    return stmt(expr(anyOf(callExpr(HasUnsafeFnDecl).bind(OpTag),
----------------
malavikasamak wrote:

Fixing in the next version.

https://github.com/llvm/llvm-project/pull/101585
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