1 // RUN: %clang_cc1 -analyze -analyzer-checker=core -analyzer-store=region -verify %s
3 typedef __INTPTR_TYPE__ intptr_t;
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}}
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}}
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}}
24 static const int &x = 3; // no warning
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}}
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}}
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}}
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}}
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}}
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}}
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}}
79 void *const &x = &&label; // expected-note {{binding reference variable 'x' here}}
80 return x; // expected-warning {{returning address of label, which is local}}
94 int& i = i; // expected-warning {{Assigned value is garbage or undefined}} expected-note {{binding reference variable 'i' here}} expected-warning{{reference 'i' is not yet bound to a value when used within its own initialization}}
95 return &i; // expected-warning {{address of stack memory associated with local variable 'i' returned}}
98 void *radar13226577() {
100 return p; // expected-warning {{stack memory associated with local variable 'p' returned to caller}}
103 namespace rdar13296133 {
104 class ConvertsToBool {
106 operator bool() const { return this; }
109 class ConvertsToIntptr {
111 operator intptr_t() const { return reinterpret_cast<intptr_t>(this); }
114 class ConvertsToPointer {
116 operator const void *() const { return this; }
119 intptr_t returnAsNonLoc() {
120 ConvertsToIntptr obj;
121 return obj; // expected-warning{{Address of stack memory associated with local variable 'obj' returned to caller}}
124 bool returnAsBool() {
126 return obj; // no-warning
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}}
134 bool returnAsBoolViaPointer() {
135 ConvertsToPointer obj;
136 return obj; // no-warning