stack-addr-ps.cpp revision 5965b7c7ddf8d9635426943a05441c71cb59fef6
1// RUN: %clang_cc1 -analyze -analyzer-checker=core -analyzer-store=region -verify %s 2 3// FIXME: Only the stack-address checking in Sema catches this right now, and 4// the stack analyzer doesn't handle the ImplicitCastExpr (lvalue). 5const 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 10const 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 16const 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 23int get_value(); 24 25const int &get_reference1() { return get_value(); } // expected-warning{{Address of stack memory associated with temporary object of type 'const int' returned}} expected-warning {{returning reference to local temporary}} 26 27const int &get_reference2() { 28 const int &x = get_value(); // expected-note {{binding reference variable 'x' here}} 29 return x; // expected-warning{{Address of stack memory associated with temporary object of type 'const int' returned}} expected-warning {{returning reference to local temporary}} 30} 31 32const int &get_reference3() { 33 const int &x1 = get_value(); // expected-note {{binding reference variable 'x1' here}} 34 const int &x2 = x1; // expected-note {{binding reference variable 'x2' here}} 35 return x2; // expected-warning{{Address of stack memory associated with temporary object of type 'const int' returned}} expected-warning {{returning reference to local temporary}} 36} 37 38int global_var; 39int *f1() { 40 int &y = global_var; 41 return &y; 42} 43 44int *f2() { 45 int x1; 46 int &x2 = x1; // expected-note {{binding reference variable 'x2' here}} 47 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}} 48} 49 50int *f3() { 51 int x1; 52 int *const &x2 = &x1; // expected-note {{binding reference variable 'x2' here}} 53 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}} 54} 55 56const int *f4() { 57 const int &x1 = get_value(); // expected-note {{binding reference variable 'x1' here}} 58 const int &x2 = x1; // expected-note {{binding reference variable 'x2' here}} 59 return &x2; // expected-warning{{Address of stack memory associated with temporary object of type 'const int' returned}} expected-warning {{returning address of local temporary}} 60} 61 62struct S { 63 int x; 64}; 65 66int *mf() { 67 S s1; 68 S &s2 = s1; // expected-note {{binding reference variable 's2' here}} 69 int &x = s2.x; // expected-note {{binding reference variable 'x' here}} 70 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}} 71} 72 73void *lf() { 74 label: 75 void *const &x = &&label; // expected-note {{binding reference variable 'x' here}} 76 return x; // expected-warning {{returning address of label, which is local}} 77} 78 79template <typename T> 80struct TS { 81 int *get(); 82 int *m() { 83 int *&x = get(); 84 return x; 85 } 86}; 87 88// rdar://11345441 89int* f5() { 90 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}} 91 return &i; // expected-warning {{address of stack memory associated with local variable 'i' returned}} 92} 93