Jordan Rose | d72f56d | 2012-07-31 02:05:30 +0000 | [diff] [blame] | 1 | // RUN: %clang_cc1 -analyze -analyzer-checker=core,debug.ExprInspection -analyzer-store=region -fblocks -verify -Wno-objc-root-class %s |
| 2 | |
| 3 | void clang_analyzer_eval(int); |
| 4 | |
| 5 | @interface Root { |
| 6 | @public |
| 7 | int uniqueID; |
| 8 | } |
| 9 | |
| 10 | - (void)refreshID; |
| 11 | @end |
| 12 | |
| 13 | void testInvalidation(Root *obj) { |
| 14 | int savedID = obj->uniqueID; |
| 15 | clang_analyzer_eval(savedID == obj->uniqueID); // expected-warning{{TRUE}} |
| 16 | |
| 17 | [obj refreshID]; |
| 18 | clang_analyzer_eval(savedID == obj->uniqueID); // expected-warning{{UNKNOWN}} |
| 19 | } |
| 20 | |
| 21 | |
| 22 | @interface Child : Root |
| 23 | @end |
| 24 | |
| 25 | @implementation Child |
| 26 | - (void)testSuperInvalidation { |
| 27 | int savedID = self->uniqueID; |
| 28 | clang_analyzer_eval(savedID == self->uniqueID); // expected-warning{{TRUE}} |
| 29 | |
| 30 | [super refreshID]; |
| 31 | clang_analyzer_eval(savedID == self->uniqueID); // expected-warning{{UNKNOWN}} |
| 32 | } |
| 33 | @end |
Jordan Rose | 1e93443 | 2012-08-09 22:55:51 +0000 | [diff] [blame] | 34 | |
| 35 | |
| 36 | @interface ManyIvars { |
| 37 | struct S { int a, b; } s; |
| 38 | int c; |
| 39 | int d; |
| 40 | } |
| 41 | @end |
| 42 | |
| 43 | struct S makeS(); |
| 44 | |
| 45 | @implementation ManyIvars |
| 46 | |
| 47 | - (void)testMultipleIvarInvalidation:(int)useConstraints { |
| 48 | if (useConstraints) { |
| 49 | if (s.a != 1) return; |
| 50 | if (s.b != 2) return; |
| 51 | if (c != 3) return; |
| 52 | if (d != 4) return; |
| 53 | return; |
| 54 | } else { |
| 55 | s.a = 1; |
| 56 | s.b = 2; |
| 57 | c = 3; |
| 58 | d = 4; |
| 59 | } |
| 60 | |
| 61 | clang_analyzer_eval(s.a == 1); // expected-warning{{TRUE}} |
| 62 | clang_analyzer_eval(s.b == 2); // expected-warning{{TRUE}} |
| 63 | clang_analyzer_eval(c == 3); // expected-warning{{TRUE}} |
| 64 | clang_analyzer_eval(d == 4); // expected-warning{{TRUE}} |
| 65 | |
| 66 | d = 0; |
| 67 | |
| 68 | clang_analyzer_eval(s.a == 1); // expected-warning{{TRUE}} |
| 69 | clang_analyzer_eval(s.b == 2); // expected-warning{{TRUE}} |
| 70 | clang_analyzer_eval(c == 3); // expected-warning{{TRUE}} |
| 71 | clang_analyzer_eval(d == 0); // expected-warning{{TRUE}} |
| 72 | |
| 73 | d = 4; |
| 74 | s = makeS(); |
| 75 | |
| 76 | clang_analyzer_eval(s.a == 1); // expected-warning{{UNKNOWN}} |
| 77 | clang_analyzer_eval(s.b == 2); // expected-warning{{UNKNOWN}} |
| 78 | clang_analyzer_eval(c == 3); // expected-warning{{TRUE}} |
| 79 | clang_analyzer_eval(d == 4); // expected-warning{{TRUE}} |
| 80 | |
| 81 | s.a = 1; |
| 82 | |
| 83 | clang_analyzer_eval(s.a == 1); // expected-warning{{TRUE}} |
| 84 | clang_analyzer_eval(s.b == 2); // expected-warning{{UNKNOWN}} |
| 85 | clang_analyzer_eval(c == 3); // expected-warning{{TRUE}} |
| 86 | clang_analyzer_eval(d == 4); // expected-warning{{TRUE}} |
| 87 | } |
| 88 | |
| 89 | + (void)testMultipleIvarInvalidation:(int)useConstraints |
| 90 | forObject:(ManyIvars *)obj { |
| 91 | if (useConstraints) { |
| 92 | if (obj->s.a != 1) return; |
| 93 | if (obj->s.b != 2) return; |
| 94 | if (obj->c != 3) return; |
| 95 | if (obj->d != 4) return; |
| 96 | return; |
| 97 | } else { |
| 98 | obj->s.a = 1; |
| 99 | obj->s.b = 2; |
| 100 | obj->c = 3; |
| 101 | obj->d = 4; |
| 102 | } |
| 103 | |
| 104 | clang_analyzer_eval(obj->s.a == 1); // expected-warning{{TRUE}} |
| 105 | clang_analyzer_eval(obj->s.b == 2); // expected-warning{{TRUE}} |
| 106 | clang_analyzer_eval(obj->c == 3); // expected-warning{{TRUE}} |
| 107 | clang_analyzer_eval(obj->d == 4); // expected-warning{{TRUE}} |
| 108 | |
| 109 | obj->d = 0; |
| 110 | |
| 111 | clang_analyzer_eval(obj->s.a == 1); // expected-warning{{TRUE}} |
| 112 | clang_analyzer_eval(obj->s.b == 2); // expected-warning{{TRUE}} |
| 113 | clang_analyzer_eval(obj->c == 3); // expected-warning{{TRUE}} |
| 114 | clang_analyzer_eval(obj->d == 0); // expected-warning{{TRUE}} |
| 115 | |
| 116 | obj->d = 4; |
| 117 | obj->s = makeS(); |
| 118 | |
| 119 | clang_analyzer_eval(obj->s.a == 1); // expected-warning{{UNKNOWN}} |
| 120 | clang_analyzer_eval(obj->s.b == 2); // expected-warning{{UNKNOWN}} |
| 121 | clang_analyzer_eval(obj->c == 3); // expected-warning{{TRUE}} |
| 122 | clang_analyzer_eval(obj->d == 4); // expected-warning{{TRUE}} |
| 123 | |
| 124 | obj->s.a = 1; |
| 125 | |
| 126 | clang_analyzer_eval(obj->s.a == 1); // expected-warning{{TRUE}} |
| 127 | clang_analyzer_eval(obj->s.b == 2); // expected-warning{{UNKNOWN}} |
| 128 | clang_analyzer_eval(obj->c == 3); // expected-warning{{TRUE}} |
| 129 | clang_analyzer_eval(obj->d == 4); // expected-warning{{TRUE}} |
| 130 | } |
| 131 | |
| 132 | @end |
Jordan Rose | 991bcb4 | 2012-09-22 01:24:38 +0000 | [diff] [blame] | 133 | |
| 134 | |
| 135 | int testNull(Root *obj) { |
| 136 | if (obj) return 0; |
| 137 | |
Jordan Rose | e606e3d | 2012-10-01 19:07:22 +0000 | [diff] [blame] | 138 | int *x = &obj->uniqueID; |
| 139 | return *x; // expected-warning{{Dereference of null pointer (loaded from variable 'x')}} |
Jordan Rose | 991bcb4 | 2012-09-22 01:24:38 +0000 | [diff] [blame] | 140 | } |