1 // RUN: %clang_cc1 -fsyntax-only -verify %s
2 struct S {
3 S(const char *) __attribute__((nonnull(2)));
4
5 static void f(const char*, const char*) __attribute__((nonnull(1)));
6
7 // GCC has a hidden 'this' argument in member functions, so the middle
8 // argument is the one that must not be null.
9 void g(const char*, const char*, const char*) __attribute__((nonnull(3)));
10
11 void h(const char*) __attribute__((nonnull(1))); // \
12 expected-error{{invalid for the implicit this argument}}
13 };
14
test()15 void test() {
16 S s(0); // expected-warning{{null passed}}
17
18 s.f(0, ""); // expected-warning{{null passed}}
19 s.f("", 0);
20 s.g("", 0, ""); // expected-warning{{null passed}}
21 s.g(0, "", 0);
22 }
23
24 namespace rdar8769025 {
25 __attribute__((nonnull)) void f0(int *&p);
26 __attribute__((nonnull)) void f1(int * const &p);
27 __attribute__((nonnull(2))) void f2(int i, int * const &p);
28
test_f1()29 void test_f1() {
30 f1(0); // expected-warning{{null passed to a callee that requires a non-null argument}}
31 f2(0, 0); // expected-warning{{null passed to a callee that requires a non-null argument}}
32 }
33 }
34
35 namespace test3 {
36 __attribute__((nonnull(1))) void f(void *ptr);
37
g()38 void g() {
39 f(static_cast<char*>((void*)0)); // expected-warning{{null passed}}
40 f(static_cast<char*>(0)); // expected-warning{{null passed}}
41 }
42 }
43
44 namespace test4 {
45 struct X {
46 bool operator!=(const void *) const __attribute__((nonnull(2)));
47 };
48 bool operator==(const X&, const void *) __attribute__((nonnull(2)));
49
test(const X & x)50 void test(const X& x) {
51 (void)(x == 0); // expected-warning{{null passed}}
52 (void)(x != 0); // expected-warning{{null passed}}
53 }
54 }
55
56 namespace test5 {
57
58 constexpr int c = 0;
59
60 __attribute__((nonnull))
f1(const int *,const int *)61 constexpr int f1(const int*, const int*) {
62 return 0;
63 }
64 constexpr int i1 = f1(&c, &c);
65 constexpr int i12 = f1(&c, 0); //expected-error {{constant expression}} expected-note {{null passed}}
66
f2(const int *,const int *)67 constexpr int f2(const int*, const int*) {
68 return 0;
69 }
70 constexpr int i2 = f2(0, 0);
71
72 __attribute__((nonnull(2)))
f3(const int *,const int *)73 constexpr int f3(const int*, const int*) {
74 return 0;
75 }
76 constexpr int i3 = f3(&c, 0); //expected-error {{constant expression}} expected-note {{null passed}}
77 constexpr int i32 = f3(0, &c);
78
79 __attribute__((nonnull(4))) __attribute__((nonnull)) //expected-error {{out of bounds}}
f4(const int *,const int *)80 constexpr int f4(const int*, const int*) {
81 return 0;
82 }
83 constexpr int i4 = f4(&c, 0); //expected-error {{constant expression}} expected-note {{null passed}}
84 constexpr int i42 = f4(0, &c); //expected-error {{constant expression}} expected-note {{null passed}}
85
86 }