| 1 | // RUN: %clang_analyze_cc1 -w -analyzer-checker=core -analyzer-config exploration_strategy=unexplored_first -analyzer-output=text -verify %s |
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| 2 | // RUN: %clang_analyze_cc1 -w -analyzer-checker=core -analyzer-config exploration_strategy=unexplored_first_queue -analyzer-output=text -verify %s |
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| 3 | |
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| 4 | extern int coin(); |
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| 5 | |
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| 6 | int foo() { |
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| 7 | int *x = 0; // expected-note {{'x' initialized to a null pointer value}} |
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| 8 | while (coin()) { // expected-note{{Loop condition is true}} |
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| 9 | if (coin()) // expected-note {{Taking true branch}} |
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| 10 | // expected-note@-1 {{Assuming the condition is true}} |
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| 11 | return *x; // expected-warning{{Dereference of null pointer (loaded from variable 'x')}} |
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| 12 | // expected-note@-1{{Dereference of null pointer (loaded from variable 'x')}} |
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| 13 | } |
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| 14 | return 0; |
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| 15 | } |
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| 16 | |
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| 17 | void bar() { |
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| 18 | while(coin()) |
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| 19 | if (coin()) |
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| 20 | foo(); |
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| 21 | } |
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| 22 | |
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| 23 | int foo2() { |
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| 24 | int *x = 0; // expected-note {{'x' initialized to a null pointer value}} |
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| 25 | while (coin()) { // expected-note{{Loop condition is true}} |
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| 26 | if (coin()) // expected-note {{Taking false branch}} |
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| 27 | // expected-note@-1 {{Assuming the condition is false}} |
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| 28 | return false; |
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| 29 | else |
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| 30 | return *x; // expected-warning{{Dereference of null pointer (loaded from variable 'x')}} |
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| 31 | // expected-note@-1{{Dereference of null pointer (loaded from variable 'x')}} |
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| 32 | } |
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| 33 | return 0; |
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| 34 | } |
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| 35 | |
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| 36 | void bar2() { |
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| 37 | while(coin()) // expected-note{{Loop condition is true}} |
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| 38 | if (coin()) // expected-note {{Assuming the condition is false}} |
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| 39 | // expected-note@-1 {{Taking false branch}} |
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| 40 | return; |
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| 41 | else |
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| 42 | foo(); // expected-note{{Calling 'foo'}} |
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| 43 | } |
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| 44 | |
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