| 1 | // RUN: %clang_analyze_cc1 -analyzer-checker=core -analyzer-output=text -analyzer-config graph-trim-interval=5 -verify %s |
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| 2 | // RUN: %clang_analyze_cc1 -analyzer-checker=core -analyzer-output=plist-multi-file -analyzer-config graph-trim-interval=5 %s -o %t.plist |
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| 3 | // RUN: cat %t.plist | %diff_plist %S/Inputs/expected-plists/eager-reclamation-path-notes.c.plist - |
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| 4 | |
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| 5 | void use(int *ptr, int val) { |
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| 6 | *ptr = val; // expected-warning {{Dereference of null pointer (loaded from variable 'ptr')}} |
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| 7 | // expected-note@-1 {{Dereference of null pointer (loaded from variable 'ptr')}} |
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| 8 | } |
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| 9 | |
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| 10 | int compute() { |
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| 11 | // Do something that will take enough processing to trigger trimming. |
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| 12 | // FIXME: This is actually really sensitive. If the interval timing is just |
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| 13 | // wrong, the node for the actual dereference may also be collected, and all |
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| 14 | // the path notes will disappear. <rdar://problem/12511814> |
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| 15 | return 2 + 3 + 4 + 5 + 6; |
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| 16 | } |
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| 17 | |
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| 18 | void testSimple() { |
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| 19 | int *p = 0; |
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| 20 | // expected-note@-1 {{'p' initialized to a null pointer value}} |
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| 21 | use(p, compute()); |
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| 22 | // expected-note@-1 {{Passing null pointer value via 1st parameter 'ptr'}} |
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| 23 | // expected-note@-2 {{Calling 'use'}} |
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| 24 | } |
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| 25 | |
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| 26 | |
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| 27 | void use2(int *ptr, int val) { |
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| 28 | *ptr = val; // expected-warning {{Dereference of null pointer (loaded from variable 'ptr')}} |
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| 29 | // expected-note@-1 {{Dereference of null pointer (loaded from variable 'ptr')}} |
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| 30 | } |
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| 31 | |
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| 32 | void passThrough(int *p) { |
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| 33 | use2(p, compute()); |
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| 34 | // expected-note@-1 {{Passing null pointer value via 1st parameter 'ptr'}} |
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| 35 | // expected-note@-2 {{Calling 'use2'}} |
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| 36 | } |
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| 37 | |
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| 38 | void testChainedCalls() { |
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| 39 | int *ptr = 0; |
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| 40 | // expected-note@-1 {{'ptr' initialized to a null pointer value}} |
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| 41 | passThrough(ptr); |
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| 42 | // expected-note@-1 {{Passing null pointer value via 1st parameter 'p'}} |
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| 43 | // expected-note@-2 {{Calling 'passThrough'}} |
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| 44 | } |
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| 45 | |
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| 46 | |
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