1 | // RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s |
2 | |
3 | int* ret_local() { |
4 | int x = 1; |
5 | return &x; // expected-warning {{address of stack memory}} |
6 | } |
7 | |
8 | int* ret_local_array() { |
9 | int x[10]; |
10 | return x; // expected-warning {{address of stack memory}} |
11 | } |
12 | |
13 | int* ret_local_array_element(int i) { |
14 | int x[10]; |
15 | return &x[i]; // expected-warning {{address of stack memory}} |
16 | } |
17 | |
18 | int *ret_local_array_element_reversed(int i) { |
19 | int x[10]; |
20 | return &i[x]; // expected-warning {{address of stack memory}} |
21 | } |
22 | |
23 | int* ret_local_array_element_const_index() { |
24 | int x[10]; |
25 | return &x[2]; // expected-warning {{address of stack memory}} |
26 | } |
27 | |
28 | int& ret_local_ref() { |
29 | int x = 1; |
30 | return x; // expected-warning {{reference to stack memory}} |
31 | } |
32 | |
33 | int* ret_local_addrOf() { |
34 | int x = 1; |
35 | return &*&x; // expected-warning {{address of stack memory}} |
36 | } |
37 | |
38 | int* ret_local_addrOf_paren() { |
39 | int x = 1; |
40 | return (&(*(&x))); // expected-warning {{address of stack memory}} |
41 | } |
42 | |
43 | int* ret_local_addrOf_ptr_arith() { |
44 | int x = 1; |
45 | return &*(&x+1); // expected-warning {{address of stack memory}} |
46 | } |
47 | |
48 | int* ret_local_addrOf_ptr_arith2() { |
49 | int x = 1; |
50 | return &*(&x+1); // expected-warning {{address of stack memory}} |
51 | } |
52 | |
53 | int* ret_local_field() { |
54 | struct { int x; } a; |
55 | return &a.x; // expected-warning {{address of stack memory}} |
56 | } |
57 | |
58 | int& ret_local_field_ref() { |
59 | struct { int x; } a; |
60 | return a.x; // expected-warning {{reference to stack memory}} |
61 | } |
62 | |
63 | int* ret_conditional(bool cond) { |
64 | int x = 1; |
65 | int y = 2; |
66 | return cond ? &x // expected-warning {{address of stack memory associated with local variable 'x' returned}} |
67 | : &y; // expected-warning {{address of stack memory associated with local variable 'y' returned}} |
68 | } |
69 | |
70 | int* ret_conditional_rhs(int *x, bool cond) { |
71 | int y = 1; |
72 | return cond ? x : &y; // expected-warning {{address of stack memory}} |
73 | } |
74 | |
75 | void* ret_c_cast() { |
76 | int x = 1; |
77 | return (void*) &x; // expected-warning {{address of stack memory}} |
78 | } |
79 | |
80 | int* ret_static_var() { |
81 | static int x = 1; |
82 | return &x; // no warning. |
83 | } |
84 | |
85 | int z = 1; |
86 | |
87 | int* ret_global() { |
88 | return &z; // no warning. |
89 | } |
90 | |
91 | int* ret_parameter(int x) { |
92 | return &x; // expected-warning {{address of stack memory}} |
93 | } |
94 | |
95 | |
96 | void* ret_cpp_static_cast(short x) { |
97 | return static_cast<void*>(&x); // expected-warning {{address of stack memory}} |
98 | } |
99 | |
100 | int* ret_cpp_reinterpret_cast(double x) { |
101 | return reinterpret_cast<int*>(&x); // expected-warning {{address of stack me}} |
102 | } |
103 | |
104 | int* ret_cpp_reinterpret_cast_no_warning(long x) { |
105 | return reinterpret_cast<int*>(x); // no-warning |
106 | } |
107 | |
108 | int* ret_cpp_const_cast(const int x) { |
109 | return const_cast<int*>(&x); // expected-warning {{address of stack memory}} |
110 | } |
111 | |
112 | struct A { virtual ~A(); }; struct B : A {}; |
113 | A* ret_cpp_dynamic_cast(B b) { |
114 | return dynamic_cast<A*>(&b); // expected-warning {{address of stack memory}} |
115 | } |
116 | |
117 | // PR 7999 - handle the case where a field is itself a reference. |
118 | template <typename T> struct PR7999 { |
119 | PR7999(T& t) : value(t) {} |
120 | T& value; |
121 | }; |
122 | |
123 | struct PR7999_X {}; |
124 | |
125 | PR7999_X& PR7999_f(PR7999<PR7999_X> s) { return s.value; } // no-warning |
126 | void test_PR7999(PR7999_X& x) { (void)PR7999_f(x); } // no-warning |
127 | |
128 | // PR 8774: Don't try to evaluate parameters with default arguments like |
129 | // variables with an initializer, especially in templates where the default |
130 | // argument may not be an expression (yet). |
131 | namespace PR8774 { |
132 | template <typename U> struct B { }; |
133 | template <typename V> V f(typename B<V>::type const &v = B<V>::value()) { |
134 | return v; |
135 | } |
136 | template <> struct B<const char *> { |
137 | typedef const char *type; |
138 | static const char *value(); |
139 | }; |
140 | void g() { |
141 | const char *t; |
142 | f<const char*>(t); |
143 | } |
144 | } |
145 | |
146 | // Don't warn about returning a local variable from a surrounding function if |
147 | // we're within a lambda-expression. |
148 | void ret_from_lambda() { |
149 | int a; |
150 | int &b = a; |
151 | (void) [&]() -> int& { return a; }; |
152 | (void) [&]() -> int& { return b; }; |
153 | (void) [=]() mutable -> int& { return a; }; |
154 | (void) [=]() mutable -> int& { return b; }; |
155 | (void) [&]() -> int& { int a; return a; }; // expected-warning {{reference to stack}} |
156 | (void) [=]() -> int& { int a; return a; }; // expected-warning {{reference to stack}} |
157 | (void) [&]() -> int& { int &a = b; return a; }; |
158 | (void) [=]() mutable -> int& { int &a = b; return a; }; |
159 | } |
160 | |
161 | namespace mem_ptr { |
162 | struct X {}; |
163 | int X::*f(); |
164 | int &r(X *p) { return p->*f(); } |
165 | } |
166 | |