[analyzer] Opt-in C Style Cast Checker for OSObject pointers

Differential Revision: https://reviews.llvm.org/D57261

llvm-svn: 353566

1 files changed, 39 insertions, 0 deletions

diff --git a/clang/test/Analysis/osobjectcstylecastchecker_test.cpp b/clang/test/Analysis/osobjectcstylecastchecker_test.cpp
new file mode 100644
index 00000000000..bc9fb3ee780
--- /dev/null
+++ b/clang/test/Analysis/osobjectcstylecastchecker_test.cpp
@@ -0,0 +1,39 @@
+// RUN: %clang_analyze_cc1 -analyzer-checker=optin.osx.OSObjectCStyleCast %s -verify
+#include "os_object_base.h"
+
+struct OSArray : public OSObject {
+  unsigned getCount();
+};
+
+struct A {
+  int x;
+};
+struct B : public A {
+  unsigned getCount();
+};
+
+unsigned warn_on_explicit_downcast(OSObject * obj) {
+  OSArray *a = (OSArray *) obj; // expected-warning{{C-style cast of OSObject. Use OSDynamicCast instead}}
+  return a->getCount();
+}
+
+void no_warn_on_upcast(OSArray *arr) {
+  OSObject *obj = (OSObject *) arr;
+  obj->retain();
+  obj->release();
+}
+
+unsigned no_warn_on_dynamic_cast(OSObject *obj) {
+  OSArray *a = OSDynamicCast(OSArray, obj);
+  return a->getCount();
+}
+
+unsigned long no_warn_on_primitive_conversion(OSArray *arr) {
+  return (unsigned long) arr;
+}
+
+unsigned no_warn_on_other_type_cast(A *a) {
+  B *b = (B *) a;
+  return b->getCount();
+}
+