[clang] [Webkit Checkers] Treat const member variables as a safe origin (PR #115594)

[Ryosuke Niwa via cfe-commits]

================
@@ -0,0 +1,66 @@
+// RUN: %clang_analyze_cc1 -analyzer-checker=alpha.webkit.UncountedCallArgsChecker -verify %s
+
+#include "mock-types.h"
+
+namespace std {
+}
+
+namespace call_args_const_refptr_member {
+
+class Foo {
+public:
+  Foo();
+  void bar();
+
+private:
+  const RefPtr<RefCountable> m_obj1;
+  RefPtr<RefCountable> m_obj2;
+};
+
+void Foo::bar() {
+  m_obj1->method();
+  m_obj2->method();
+  // expected-warning at -1{{Call argument for 'this' parameter is uncounted and unsafe}}
+}
+
+} // namespace call_args_const_refptr_member
+
+namespace call_args_const_ref_member {
+
+class Foo {
+public:
+  Foo();
+  void bar();
+
+private:
+  const Ref<RefCountable> m_obj1;
+  Ref<RefCountable> m_obj2;
+};
+
+void Foo::bar() {
+  m_obj1->method();
+  m_obj2->method();
+  // expected-warning at -1{{Call argument for 'this' parameter is uncounted and unsafe}}
+}
+
+} // namespace call_args_const_ref_member
+
+namespace call_args_const_unique_ptr {
+
+class Foo {
+public:
+  Foo();
+  void bar();
+
+private:
+  const std::unique_ptr<RefCountable> m_obj1;
+  std::unique_ptr<RefCountable> m_obj2;
+};
+
+void Foo::bar() {
+  m_obj1->method();
+  m_obj2->method();
+  // expected-warning at -1{{Call argument for 'this' parameter is uncounted and unsafe}}
+}
+
+} // namespace call_args_const_unique_ptr
----------------
rniwa wrote:

Added a test case for UniqueRef in addition to unique_ptr.

https://github.com/llvm/llvm-project/pull/115594