[clang-tools-extra] [clang-tidy] Add WarnOnSizeOfPointer mode to bugprone-sizeof-expression (PR #94356)

[Piotr Zegar via cfe-commits]

=?utf-8?q?Donát?= Nagy <donat.nagy at ericsson.com>,
=?utf-8?q?Donát?= Nagy <donat.nagy at ericsson.com>,
=?utf-8?q?Donát?= Nagy <donat.nagy at ericsson.com>,
=?utf-8?q?Donát?= Nagy <donat.nagy at ericsson.com>,
=?utf-8?q?Donát?= Nagy <donat.nagy at ericsson.com>
Message-ID:
In-Reply-To: <llvm.org/llvm/llvm-project/pull/94356 at github.com>


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@@ -292,11 +318,17 @@ void SizeofExpressionCheck::check(const MatchFinder::MatchResult &Result) {
     diag(E->getBeginLoc(),
          "suspicious usage of 'sizeof(char*)'; do you mean 'strlen'?")
         << E->getSourceRange();
-  } else if (const auto *E =
-                 Result.Nodes.getNodeAs<Expr>("sizeof-pointer-to-aggregate")) {
-    diag(E->getBeginLoc(),
-         "suspicious usage of 'sizeof(A*)'; pointer to aggregate")
-        << E->getSourceRange();
+  } else if (const auto *E = Result.Nodes.getNodeAs<Expr>("sizeof-pointer")) {
+    if (Result.Nodes.getNodeAs<Type>("struct-type")) {
+      diag(E->getBeginLoc(),
+           "suspicious usage of 'sizeof(A*)' on pointer-to-aggregate type; did "
+           "you mean 'sizeof(A)'?")
+          << E->getSourceRange();
+    } else {
+      diag(E->getBeginLoc(), "suspicious usage of 'sizeof()' on an expression "
+                             "that results in a pointer")
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PiotrZSL wrote:

ok

https://github.com/llvm/llvm-project/pull/94356