1 | // RUN: %clang_analyze_cc1 -analyzer-checker=core -analyzer-store=region -verify %s -Wno-undefined-bool-conversion |
2 | |
3 | typedef __INTPTR_TYPE__ intptr_t; |
4 | |
5 | const int& g() { |
6 | int s; |
7 | return s; // expected-warning{{Address of stack memory associated with local variable 's' returned}} expected-warning{{reference to stack memory associated with local variable 's' returned}} |
8 | } |
9 | |
10 | const int& g2() { |
11 | int s1; |
12 | int &s2 = s1; // expected-note {{binding reference variable 's2' here}} |
13 | return s2; // expected-warning{{Address of stack memory associated with local variable 's1' returned}} expected-warning {{reference to stack memory associated with local variable 's1' returned}} |
14 | } |
15 | |
16 | const int& g3() { |
17 | int s1; |
18 | int &s2 = s1; // expected-note {{binding reference variable 's2' here}} |
19 | int &s3 = s2; // expected-note {{binding reference variable 's3' here}} |
20 | return s3; // expected-warning{{Address of stack memory associated with local variable 's1' returned}} expected-warning {{reference to stack memory associated with local variable 's1' returned}} |
21 | } |
22 | |
23 | void g4() { |
24 | static const int &x = 3; // no warning |
25 | } |
26 | |
27 | int get_value(); |
28 | |
29 | const int &get_reference1() { return get_value(); } // expected-warning{{Address of stack memory associated with temporary object of type 'int' returned}} expected-warning {{returning reference to local temporary}} |
30 | |
31 | const int &get_reference2() { |
32 | const int &x = get_value(); // expected-note {{binding reference variable 'x' here}} |
33 | return x; // expected-warning{{Address of stack memory associated with temporary object of type 'int' returned}} expected-warning {{returning reference to local temporary}} |
34 | } |
35 | |
36 | const int &get_reference3() { |
37 | const int &x1 = get_value(); // expected-note {{binding reference variable 'x1' here}} |
38 | const int &x2 = x1; // expected-note {{binding reference variable 'x2' here}} |
39 | return x2; // expected-warning{{Address of stack memory associated with temporary object of type 'int' returned}} expected-warning {{returning reference to local temporary}} |
40 | } |
41 | |
42 | int global_var; |
43 | int *f1() { |
44 | int &y = global_var; |
45 | return &y; |
46 | } |
47 | |
48 | int *f2() { |
49 | int x1; |
50 | int &x2 = x1; // expected-note {{binding reference variable 'x2' here}} |
51 | return &x2; // expected-warning{{Address of stack memory associated with local variable 'x1' returned}} expected-warning {{address of stack memory associated with local variable 'x1' returned}} |
52 | } |
53 | |
54 | int *f3() { |
55 | int x1; |
56 | int *const &x2 = &x1; // expected-note {{binding reference variable 'x2' here}} |
57 | return x2; // expected-warning {{address of stack memory associated with local variable 'x1' returned}} expected-warning {{Address of stack memory associated with local variable 'x1' returned to caller}} |
58 | } |
59 | |
60 | const int *f4() { |
61 | const int &x1 = get_value(); // expected-note {{binding reference variable 'x1' here}} |
62 | const int &x2 = x1; // expected-note {{binding reference variable 'x2' here}} |
63 | return &x2; // expected-warning{{Address of stack memory associated with temporary object of type 'int' returned}} expected-warning {{returning address of local temporary}} |
64 | } |
65 | |
66 | struct S { |
67 | int x; |
68 | }; |
69 | |
70 | int *mf() { |
71 | S s1; |
72 | S &s2 = s1; // expected-note {{binding reference variable 's2' here}} |
73 | int &x = s2.x; // expected-note {{binding reference variable 'x' here}} |
74 | return &x; // expected-warning{{Address of stack memory associated with local variable 's1' returned}} expected-warning {{address of stack memory associated with local variable 's1' returned}} |
75 | } |
76 | |
77 | void *lf() { |
78 | label: |
79 | void *const &x = &&label; // expected-note {{binding reference variable 'x' here}} |
80 | return x; // expected-warning {{returning address of label, which is local}} |
81 | } |
82 | |
83 | template <typename T> |
84 | struct TS { |
85 | int *get(); |
86 | int *m() { |
87 | int *&x = get(); |
88 | return x; |
89 | } |
90 | }; |
91 | |
92 | // rdar://11345441 |
93 | int* f5() { |
94 | int& i = i; // expected-warning {{Assigned value is garbage or undefined}} expected-warning{{reference 'i' is not yet bound to a value when used within its own initialization}} |
95 | return &i; |
96 | } |
97 | |
98 | void *radar13226577() { |
99 | void *p = &p; |
100 | return p; // expected-warning {{stack memory associated with local variable 'p' returned to caller}} |
101 | } |
102 | |
103 | namespace rdar13296133 { |
104 | class ConvertsToBool { |
105 | public: |
106 | operator bool() const { return this; } |
107 | }; |
108 | |
109 | class ConvertsToIntptr { |
110 | public: |
111 | operator intptr_t() const { return reinterpret_cast<intptr_t>(this); } |
112 | }; |
113 | |
114 | class ConvertsToPointer { |
115 | public: |
116 | operator const void *() const { return this; } |
117 | }; |
118 | |
119 | intptr_t returnAsNonLoc() { |
120 | ConvertsToIntptr obj; |
121 | return obj; // expected-warning{{Address of stack memory associated with local variable 'obj' returned to caller}} |
122 | } |
123 | |
124 | bool returnAsBool() { |
125 | ConvertsToBool obj; |
126 | return obj; // no-warning |
127 | } |
128 | |
129 | intptr_t returnAsNonLocViaPointer() { |
130 | ConvertsToPointer obj; |
131 | return reinterpret_cast<intptr_t>(static_cast<const void *>(obj)); // expected-warning{{Address of stack memory associated with local variable 'obj' returned to caller}} |
132 | } |
133 | |
134 | bool returnAsBoolViaPointer() { |
135 | ConvertsToPointer obj; |
136 | return obj; // no-warning |
137 | } |
138 | } |
139 | |
140 | |