forked from OSchip/llvm-project
119 lines
2.2 KiB
C++
119 lines
2.2 KiB
C++
// RUN: %clang_cc1 -analyze -analyzer-checker=core,debug.ExprInspection -verify %s
|
|
|
|
void clang_analyzer_eval(bool);
|
|
|
|
typedef struct Opaque *Data;
|
|
struct IntWrapper {
|
|
int x;
|
|
};
|
|
|
|
struct Child : public IntWrapper {
|
|
void set() { x = 42; }
|
|
};
|
|
|
|
void test(Data data) {
|
|
Child *wrapper = reinterpret_cast<Child*>(data);
|
|
// Don't crash when upcasting here.
|
|
// We don't actually know if 'data' is a Child.
|
|
wrapper->set();
|
|
clang_analyzer_eval(wrapper->x == 42); // expected-warning{{TRUE}}
|
|
}
|
|
|
|
namespace PR14872 {
|
|
class Base1 {};
|
|
class Derived1 : public Base1 {};
|
|
|
|
Derived1 *f1();
|
|
|
|
class Base2 {};
|
|
class Derived2 : public Base2 {};
|
|
|
|
void f2(Base2 *foo);
|
|
|
|
void f3(void** out)
|
|
{
|
|
Base1 *v;
|
|
v = f1();
|
|
*out = v;
|
|
}
|
|
|
|
void test()
|
|
{
|
|
Derived2 *p;
|
|
f3(reinterpret_cast<void**>(&p));
|
|
// Don't crash when upcasting here.
|
|
// In this case, 'p' actually refers to a Derived1.
|
|
f2(p);
|
|
}
|
|
}
|
|
|
|
namespace rdar13249297 {
|
|
struct IntWrapperSubclass : public IntWrapper {};
|
|
|
|
struct IntWrapperWrapper {
|
|
IntWrapper w;
|
|
};
|
|
|
|
void test(IntWrapperWrapper *ww) {
|
|
reinterpret_cast<IntWrapperSubclass *>(ww)->x = 42;
|
|
clang_analyzer_eval(reinterpret_cast<IntWrapperSubclass *>(ww)->x == 42); // expected-warning{{TRUE}}
|
|
|
|
clang_analyzer_eval(ww->w.x == 42); // expected-warning{{TRUE}}
|
|
ww->w.x = 0;
|
|
|
|
clang_analyzer_eval(reinterpret_cast<IntWrapperSubclass *>(ww)->x == 42); // expected-warning{{FALSE}}
|
|
}
|
|
}
|
|
|
|
namespace PR15345 {
|
|
class C {};
|
|
|
|
class Base {
|
|
public:
|
|
void (*f)();
|
|
int x;
|
|
};
|
|
|
|
class Derived : public Base {};
|
|
|
|
void test() {
|
|
Derived* p;
|
|
*(reinterpret_cast<void**>(&p)) = new C;
|
|
p->f();
|
|
|
|
// We should still be able to do some reasoning about bindings.
|
|
p->x = 42;
|
|
clang_analyzer_eval(p->x == 42); // expected-warning{{TRUE}}
|
|
};
|
|
}
|
|
|
|
int trackpointer_std_addressof() {
|
|
int x;
|
|
int *p = (int*)&reinterpret_cast<const volatile char&>(x);
|
|
*p = 6;
|
|
return x; // no warning
|
|
}
|
|
|
|
void set_x1(int *&);
|
|
void set_x2(void *&);
|
|
int radar_13146953(void) {
|
|
int *x = 0, *y = 0;
|
|
|
|
set_x1(x);
|
|
set_x2((void *&)y);
|
|
return *x + *y; // no warning
|
|
}
|
|
|
|
namespace PR25426 {
|
|
struct Base {
|
|
int field;
|
|
};
|
|
|
|
struct Derived : Base { };
|
|
|
|
void foo(int &p) {
|
|
Derived &d = (Derived &)(p);
|
|
d.field = 2;
|
|
}
|
|
}
|