| // RUN: %clang_analyze_cc1 -analyzer-checker=core -analyzer-output=text -verify %s |
| |
| struct S { |
| int *x; |
| int y; |
| }; |
| |
| S &getSomeReference(); |
| void test(S *p) { |
| S &r = *p; //expected-note {{'r' initialized here}} |
| if (p) return; |
| //expected-note@-1{{Taking false branch}} |
| //expected-note@-2{{Assuming 'p' is null}} |
| r.y = 5; // expected-warning {{Access to field 'y' results in a dereference of a null pointer (loaded from variable 'r')}} |
| // expected-note@-1{{Access to field 'y' results in a dereference of a null pointer (loaded from variable 'r')}} |
| } |
| |
| void testRefParam(int *ptr) { |
| int &ref = *ptr; // expected-note {{'ref' initialized here}} |
| if (ptr) |
| // expected-note@-1{{Assuming 'ptr' is null}} |
| // expected-note@-2{{Taking false branch}} |
| return; |
| |
| extern void use(int &ref); |
| use(ref); // expected-warning{{Forming reference to null pointer}} |
| // expected-note@-1{{Forming reference to null pointer}} |
| } |
| |
| int testRefToNullPtr() { |
| int *p = 0; // expected-note {{'p' initialized to a null pointer value}} |
| int *const &p2 = p; // expected-note{{'p2' initialized here}} |
| int *p3 = p2; // expected-note {{'p3' initialized to a null pointer value}} |
| return *p3; // expected-warning {{Dereference of null pointer}} |
| // expected-note@-1{{Dereference of null pointer}} |
| } |
| |
| int testRefToNullPtr2() { |
| int *p = 0; // expected-note {{'p' initialized to a null pointer value}} |
| int *const &p2 = p;// expected-note{{'p2' initialized here}} |
| return *p2; //expected-warning {{Dereference of null pointer}} |
| // expected-note@-1{{Dereference of null pointer}} |
| } |
