blob: 7b8c2f3ee9a48f34649e276a47717f07c3de2280 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
|
// RUN: %clang_analyze_cc1 -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;
}
}
|
