| 1 | // RUN: %clang_analyze_cc1 -w -x c -analyzer-checker=core,unix -analyzer-output=text -verify %s |
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| 2 | |
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| 3 | // Avoid the crash when finding the expression for tracking the origins |
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| 4 | // of the null pointer for path notes. |
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| 5 | void pr34373() { |
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| 6 | int *a = 0; // expected-note{{'a' initialized to a null pointer value}} |
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| 7 | (a + 0)[0]; // expected-warning{{Array access results in a null pointer dereference}} |
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| 8 | // expected-note@-1{{Array access results in a null pointer dereference}} |
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| 9 | } |
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| 10 | |
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| 11 | typedef __typeof(sizeof(int)) size_t; |
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| 12 | void *memcpy(void *dest, const void *src, unsigned long count); |
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| 13 | |
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| 14 | void f1(char *source) { |
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| 15 | char *destination = 0; // expected-note{{'destination' initialized to a null pointer value}} |
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| 16 | memcpy(destination + 0, source, 10); // expected-warning{{Null pointer argument in call to memory copy function}} |
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| 17 | // expected-note@-1{{Null pointer argument in call to memory copy function}} |
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| 18 | } |
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| 19 | |
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| 20 | void f2(char *source) { |
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| 21 | char *destination = 0; // expected-note{{'destination' initialized to a null pointer value}} |
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| 22 | memcpy(destination - 0, source, 10); // expected-warning{{Null pointer argument in call to memory copy function}} |
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| 23 | // expected-note@-1{{Null pointer argument in call to memory copy function}} |
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| 24 | } |
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| 25 | |
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| 26 | void f3(char *source) { |
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| 27 | char *destination = 0; // expected-note{{'destination' initialized to a null pointer value}} |
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| 28 | destination = destination + 0; // expected-note{{Null pointer value stored to 'destination'}} |
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| 29 | memcpy(destination, source, 10); // expected-warning{{Null pointer argument in call to memory copy function}} |
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| 30 | // expected-note@-1{{Null pointer argument in call to memory copy function}} |
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| 31 | } |
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| 32 | |
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| 33 | void f4(char *source) { |
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| 34 | char *destination = 0; // expected-note{{'destination' initialized to a null pointer value}} |
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| 35 | destination = destination - 0; // expected-note{{Null pointer value stored to 'destination'}} |
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| 36 | memcpy(destination, source, 10); // expected-warning{{Null pointer argument in call to memory copy function}} |
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| 37 | // expected-note@-1{{Null pointer argument in call to memory copy function}} |
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| 38 | } |
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| 39 | |
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| 40 | void f5(char *source) { |
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| 41 | char *destination1 = 0; // expected-note{{'destination1' initialized to a null pointer value}} |
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| 42 | char *destination2 = destination1 + 0; // expected-note{{'destination2' initialized to a null pointer value}} |
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| 43 | memcpy(destination2, source, 10); // expected-warning{{Null pointer argument in call to memory copy function}} |
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| 44 | // expected-note@-1{{Null pointer argument in call to memory copy function}} |
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| 45 | } |
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| 46 | |
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| 47 | void f6(char *source) { |
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| 48 | char *destination1 = 0; // expected-note{{'destination1' initialized to a null pointer value}} |
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| 49 | char *destination2 = destination1 - 0; // expected-note{{'destination2' initialized to a null pointer value}} |
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| 50 | memcpy(destination2, source, 10); // expected-warning{{Null pointer argument in call to memory copy function}} |
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| 51 | // expected-note@-1{{Null pointer argument in call to memory copy function}} |
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| 52 | } |
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| 53 | |
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