| 1 | // RUN: %clang_analyze_cc1 -analyzer-checker=core -analyzer-store=region -analyzer-output=text -fblocks -verify -Wno-objc-root-class %s |
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| 2 | // RUN: %clang_analyze_cc1 -analyzer-checker=core -analyzer-store=region -analyzer-output=plist-multi-file -fblocks -Wno-objc-root-class %s -o %t |
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| 3 | // RUN: cat %t | %diff_plist %S/Inputs/expected-plists/null-deref-path-notes.m.plist - |
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| 4 | |
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| 5 | @interface Root { |
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| 6 | @public |
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| 7 | int uniqueID; |
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| 8 | } |
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| 9 | - (id)initWithID:(int)newID; |
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| 10 | - (void)refreshID; |
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| 11 | @end |
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| 12 | |
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| 13 | int testNull(Root *obj) { |
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| 14 | if (obj) return 0; |
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| 15 | // expected-note@-1 {{Assuming 'obj' is nil}} |
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| 16 | // expected-note@-2 {{Taking false branch}} |
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| 17 | |
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| 18 | int *x = &obj->uniqueID; // expected-note{{'x' initialized to a null pointer value}} |
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| 19 | return *x; // expected-warning{{Dereference of null pointer (loaded from variable 'x')}} expected-note{{Dereference of null pointer (loaded from variable 'x')}} |
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| 20 | } |
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| 21 | |
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| 22 | |
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| 23 | @interface Subclass : Root |
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| 24 | @end |
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| 25 | |
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| 26 | @implementation Subclass |
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| 27 | - (id)initWithID:(int)newID { |
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| 28 | self = [super initWithID:newID]; // expected-note{{Value assigned to 'self'}} |
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| 29 | if (self) return self; |
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| 30 | // expected-note@-1 {{Assuming 'self' is nil}} |
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| 31 | // expected-note@-2 {{Taking false branch}} |
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| 32 | |
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| 33 | uniqueID = newID; // expected-warning{{Access to instance variable 'uniqueID' results in a dereference of a null pointer (loaded from variable 'self')}} expected-note{{Access to instance variable 'uniqueID' results in a dereference of a null pointer (loaded from variable 'self')}} |
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| 34 | return self; |
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| 35 | } |
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| 36 | |
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| 37 | @end |
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| 38 | |
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| 39 | void repeatedStores(int coin) { |
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| 40 | int *p = 0; |
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| 41 | if (coin) { |
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| 42 | // expected-note@-1 {{Assuming 'coin' is 0}} |
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| 43 | // expected-note@-2 {{Taking false branch}} |
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| 44 | extern int *getPointer(); |
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| 45 | p = getPointer(); |
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| 46 | } else { |
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| 47 | p = 0; // expected-note {{Null pointer value stored to 'p'}} |
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| 48 | } |
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| 49 | |
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| 50 | *p = 1; // expected-warning{{Dereference of null pointer}} expected-note{{Dereference of null pointer}} |
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| 51 | } |
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| 52 | |
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| 53 | @interface WithArrayPtr |
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| 54 | - (void) useArray; |
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| 55 | @end |
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| 56 | |
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| 57 | @implementation WithArrayPtr { |
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| 58 | @public int *p; |
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| 59 | } |
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| 60 | - (void)useArray { |
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| 61 | p[1] = 2; // expected-warning{{Array access (via ivar 'p') results in a null pointer dereference}} |
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| 62 | // expected-note@-1{{Array access (via ivar 'p') results in a null pointer dereference}} |
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| 63 | } |
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| 64 | @end |
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| 65 | |
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| 66 | void testWithArrayPtr(WithArrayPtr *w) { |
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| 67 | w->p = 0; // expected-note{{Null pointer value stored to 'p'}} |
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| 68 | [w useArray]; // expected-note{{Calling 'useArray'}} |
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| 69 | } |
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| 70 | |
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| 71 | |
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