43 lines
1.6 KiB
C++
43 lines
1.6 KiB
C++
// RUN: %clang_cc1 -analyze -analyzer-checker=core -analyzer-output=text -verify %s
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struct S {
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int *x;
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int y;
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};
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S &getSomeReference();
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void test(S *p) {
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S &r = *p; //expected-note {{'r' initialized here}}
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if (p) return;
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//expected-note@-1{{Taking false branch}}
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//expected-note@-2{{Assuming 'p' is null}}
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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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// expected-note@-1{{Access to field 'y' results in a dereference of a null pointer (loaded from variable 'r')}}
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}
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void testRefParam(int *ptr) {
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int &ref = *ptr; // expected-note {{'ref' initialized here}}
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if (ptr)
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// expected-note@-1{{Assuming 'ptr' is null}}
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// expected-note@-2{{Taking false branch}}
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return;
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extern void use(int &ref);
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use(ref); // expected-warning{{Forming reference to null pointer}}
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// expected-note@-1{{Forming reference to null pointer}}
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}
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int testRefToNullPtr() {
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int *p = 0; // expected-note {{'p' initialized to a null pointer value}}
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int *const &p2 = p; // expected-note{{'p2' initialized here}}
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int *p3 = p2; // expected-note {{'p3' initialized to a null pointer value}}
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return *p3; // expected-warning {{Dereference of null pointer}}
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// expected-note@-1{{Dereference of null pointer}}
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}
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int testRefToNullPtr2() {
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int *p = 0; // expected-note {{'p' initialized to a null pointer value}}
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int *const &p2 = p;// expected-note{{'p2' initialized here}}
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return *p2; //expected-warning {{Dereference of null pointer}}
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// expected-note@-1{{Dereference of null pointer}}
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} |