| 1 | // RUN: %clang_analyze_cc1 -analyzer-checker=core -analyzer-output=text -verify %s |
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| 2 | |
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| 3 | struct S { |
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| 4 | int *x; |
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| 5 | int y; |
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| 6 | }; |
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| 7 | |
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| 8 | S &getSomeReference(); |
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| 9 | void test(S *p) { |
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| 10 | S &r = *p; //expected-note {{'r' initialized here}} |
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| 11 | if (p) return; |
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| 12 | //expected-note@-1{{Taking false branch}} |
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| 13 | //expected-note@-2{{Assuming 'p' is null}} |
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| 14 | r.y = 5; // expected-warning {{Access to field 'y' results in a dereference of a null pointer (loaded from variable 'r')}} |
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| 15 | // expected-note@-1{{Access to field 'y' results in a dereference of a null pointer (loaded from variable 'r')}} |
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| 16 | } |
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| 17 | |
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| 18 | void testRefParam(int *ptr) { |
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| 19 | int &ref = *ptr; // expected-note {{'ref' initialized here}} |
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| 20 | if (ptr) |
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| 21 | // expected-note@-1{{Assuming 'ptr' is null}} |
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| 22 | // expected-note@-2{{Taking false branch}} |
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| 23 | return; |
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| 24 | |
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| 25 | extern void use(int &ref); |
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| 26 | use(ref); // expected-warning{{Forming reference to null pointer}} |
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| 27 | // expected-note@-1{{Forming reference to null pointer}} |
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| 28 | } |
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| 29 | |
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| 30 | int testRefToNullPtr() { |
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| 31 | int *p = 0; // expected-note {{'p' initialized to a null pointer value}} |
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| 32 | int *const &p2 = p; // expected-note{{'p2' initialized here}} |
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| 33 | int *p3 = p2; // expected-note {{'p3' initialized to a null pointer value}} |
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| 34 | return *p3; // expected-warning {{Dereference of null pointer}} |
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| 35 | // expected-note@-1{{Dereference of null pointer}} |
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| 36 | } |
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| 37 | |
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| 38 | int testRefToNullPtr2() { |
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| 39 | int *p = 0; // expected-note {{'p' initialized to a null pointer value}} |
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| 40 | int *const &p2 = p;// expected-note{{'p2' initialized here}} |
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| 41 | return *p2; //expected-warning {{Dereference of null pointer}} |
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| 42 | // expected-note@-1{{Dereference of null pointer}} |
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| 43 | } |
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