139 lines
5 KiB
C++
139 lines
5 KiB
C++
// RUN: %clang_cc1 -analyze -analyzer-checker=core -analyzer-store=region -verify %s
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typedef __INTPTR_TYPE__ intptr_t;
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const int& g() {
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int s;
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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}}
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}
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const int& g2() {
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int s1;
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int &s2 = s1; // expected-note {{binding reference variable 's2' here}}
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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}}
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}
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const int& g3() {
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int s1;
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int &s2 = s1; // expected-note {{binding reference variable 's2' here}}
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int &s3 = s2; // expected-note {{binding reference variable 's3' here}}
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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}}
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}
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void g4() {
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static const int &x = 3; // no warning
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}
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int get_value();
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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}}
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const int &get_reference2() {
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const int &x = get_value(); // expected-note {{binding reference variable 'x' here}}
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return x; // expected-warning{{Address of stack memory associated with temporary object of type 'int' returned}} expected-warning {{returning reference to local temporary}}
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}
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const int &get_reference3() {
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const int &x1 = get_value(); // expected-note {{binding reference variable 'x1' here}}
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const int &x2 = x1; // expected-note {{binding reference variable 'x2' here}}
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return x2; // expected-warning{{Address of stack memory associated with temporary object of type 'int' returned}} expected-warning {{returning reference to local temporary}}
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}
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int global_var;
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int *f1() {
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int &y = global_var;
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return &y;
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}
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int *f2() {
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int x1;
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int &x2 = x1; // expected-note {{binding reference variable 'x2' here}}
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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}}
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}
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int *f3() {
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int x1;
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int *const &x2 = &x1; // expected-note {{binding reference variable 'x2' here}}
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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}}
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}
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const int *f4() {
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const int &x1 = get_value(); // expected-note {{binding reference variable 'x1' here}}
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const int &x2 = x1; // expected-note {{binding reference variable 'x2' here}}
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return &x2; // expected-warning{{Address of stack memory associated with temporary object of type 'int' returned}} expected-warning {{returning address of local temporary}}
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}
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struct S {
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int x;
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};
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int *mf() {
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S s1;
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S &s2 = s1; // expected-note {{binding reference variable 's2' here}}
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int &x = s2.x; // expected-note {{binding reference variable 'x' here}}
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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}}
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}
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void *lf() {
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label:
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void *const &x = &&label; // expected-note {{binding reference variable 'x' here}}
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return x; // expected-warning {{returning address of label, which is local}}
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}
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template <typename T>
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struct TS {
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int *get();
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int *m() {
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int *&x = get();
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return x;
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}
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};
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// rdar://11345441
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int* f5() {
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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}}
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return &i; // expected-warning {{address of stack memory associated with local variable 'i' returned}}
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}
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void *radar13226577() {
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void *p = &p;
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return p; // expected-warning {{stack memory associated with local variable 'p' returned to caller}}
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}
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namespace rdar13296133 {
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class ConvertsToBool {
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public:
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operator bool() const { return this; }
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};
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class ConvertsToIntptr {
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public:
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operator intptr_t() const { return reinterpret_cast<intptr_t>(this); }
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};
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class ConvertsToPointer {
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public:
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operator const void *() const { return this; }
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};
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intptr_t returnAsNonLoc() {
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ConvertsToIntptr obj;
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return obj; // expected-warning{{Address of stack memory associated with local variable 'obj' returned to caller}}
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}
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bool returnAsBool() {
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ConvertsToBool obj;
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return obj; // no-warning
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}
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intptr_t returnAsNonLocViaPointer() {
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ConvertsToPointer obj;
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return reinterpret_cast<intptr_t>(static_cast<const void *>(obj)); // expected-warning{{Address of stack memory associated with local variable 'obj' returned to caller}}
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}
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bool returnAsBoolViaPointer() {
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ConvertsToPointer obj;
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return obj; // no-warning
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}
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}
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