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// RUN: %clang_analyze_cc1 -std=c++14 -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 an OSObject is prone to type confusion attacks; use 'OSRequiredCast' if the object is definitely of type 'OSArray', or 'OSDynamicCast' followed by a null check if unsure}}
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();
}
__SIZE_TYPE__ no_warn_on_primitive_conversion(OSArray *arr) {
return (__SIZE_TYPE__) arr;
}
unsigned no_warn_on_other_type_cast(A *a) {
B *b = (B *) a;
return b->getCount();
}
unsigned no_warn_alloc_class_with_name() {
OSArray *a = (OSArray *)OSMetaClass::allocClassWithName("OSArray"); // no warning
return a->getCount();
}
unsigned warn_alloc_class_with_name() {
OSArray *a = (OSArray *)OSMetaClass::allocClassWithName("OSObject"); // expected-warning{{C-style cast of an OSObject is prone to type confusion attacks; use 'OSRequiredCast' if the object is definitely of type 'OSArray', or 'OSDynamicCast' followed by a null check if unsure}}
return a->getCount();
}
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