| 1 | // RUN: %clang_analyze_cc1 -analyzer-checker=core,debug.ExprInspection -analyzer-config ipa=dynamic-bifurcate -verify -analyzer-config eagerly-assume=false %s |
| 2 | |
| 3 | void clang_analyzer_checkInlined(int); |
| 4 | void clang_analyzer_eval(int); |
| 5 | |
| 6 | // Test inlining of ObjC class methods. |
| 7 | |
| 8 | typedef signed char BOOL; |
| 9 | typedef struct objc_class *Class; |
| 10 | typedef struct objc_object { |
| 11 | Class isa; |
| 12 | } *id; |
| 13 | @protocol NSObject - (BOOL)isEqual:(id)object; @end |
| 14 | @interface NSObject <NSObject> {} |
| 15 | +(id)alloc; |
| 16 | -(id)init; |
| 17 | -(id)autorelease; |
| 18 | -(id)copy; |
| 19 | - (Class)class; |
| 20 | -(id)retain; |
| 21 | @end |
| 22 | |
| 23 | // Vanila: ObjC class method is called by name. |
| 24 | @interface MyParent : NSObject |
| 25 | + (int)getInt; |
| 26 | @end |
| 27 | @interface MyClass : MyParent |
| 28 | + (int)getInt; |
| 29 | @end |
| 30 | @implementation MyClass |
| 31 | + (int)testClassMethodByName { |
| 32 | int y = [MyClass getInt]; |
| 33 | return 5/y; // expected-warning {{Division by zero}} |
| 34 | } |
| 35 | + (int)getInt { |
| 36 | return 0; |
| 37 | } |
| 38 | @end |
| 39 | |
| 40 | // The definition is defined by the parent. Make sure we find it and inline. |
| 41 | @interface MyParentDIP : NSObject |
| 42 | + (int)getInt; |
| 43 | @end |
| 44 | @interface MyClassDIP : MyParentDIP |
| 45 | @end |
| 46 | @implementation MyClassDIP |
| 47 | + (int)testClassMethodByName { |
| 48 | int y = [MyClassDIP getInt]; |
| 49 | return 5/y; // expected-warning {{Division by zero}} |
| 50 | } |
| 51 | @end |
| 52 | @implementation MyParentDIP |
| 53 | + (int)getInt { |
| 54 | return 0; |
| 55 | } |
| 56 | @end |
| 57 | |
| 58 | // ObjC class method is called by name. Definition is in the category. |
| 59 | @interface AAA : NSObject |
| 60 | @end |
| 61 | @interface AAA (MyCat) |
| 62 | + (int)getInt; |
| 63 | @end |
| 64 | int foo() { |
| 65 | int y = [AAA getInt]; |
| 66 | return 5/y; // expected-warning {{Division by zero}} |
| 67 | } |
| 68 | @implementation AAA |
| 69 | @end |
| 70 | @implementation AAA (MyCat) |
| 71 | + (int)getInt { |
| 72 | return 0; |
| 73 | } |
| 74 | @end |
| 75 | |
| 76 | // ObjC class method is called by name. Definition is in the parent category. |
| 77 | @interface PPP : NSObject |
| 78 | @end |
| 79 | @interface PPP (MyCat) |
| 80 | + (int)getInt; |
| 81 | @end |
| 82 | @interface CCC : PPP |
| 83 | @end |
| 84 | int foo4() { |
| 85 | int y = [CCC getInt]; |
| 86 | return 5/y; // expected-warning {{Division by zero}} |
| 87 | } |
| 88 | @implementation PPP |
| 89 | @end |
| 90 | @implementation PPP (MyCat) |
| 91 | + (int)getInt { |
| 92 | return 0; |
| 93 | } |
| 94 | @end |
| 95 | |
| 96 | // There is no declaration in the class but there is one in the parent. Make |
| 97 | // sure we pick the definition from the class and not the parent. |
| 98 | @interface MyParentTricky : NSObject |
| 99 | + (int)getInt; |
| 100 | @end |
| 101 | @interface MyClassTricky : MyParentTricky |
| 102 | @end |
| 103 | @implementation MyParentTricky |
| 104 | + (int)getInt { |
| 105 | return 0; |
| 106 | } |
| 107 | @end |
| 108 | @implementation MyClassTricky |
| 109 | + (int)getInt { |
| 110 | return 1; |
| 111 | } |
| 112 | + (int)testClassMethodByName { |
| 113 | int y = [MyClassTricky getInt]; |
| 114 | return 5/y; // no-warning |
| 115 | } |
| 116 | @end |
| 117 | |
| 118 | // ObjC class method is called by unknown class declaration (passed in as a |
| 119 | // parameter). We should not inline in such case. |
| 120 | @interface MyParentUnknown : NSObject |
| 121 | + (int)getInt; |
| 122 | @end |
| 123 | @interface MyClassUnknown : MyParentUnknown |
| 124 | + (int)getInt; |
| 125 | @end |
| 126 | @implementation MyClassUnknown |
| 127 | + (int)testClassVariableByUnknownVarDecl: (Class)cl { |
| 128 | int y = [cl getInt]; |
| 129 | return 3/y; // no-warning |
| 130 | } |
| 131 | + (int)getInt { |
| 132 | return 0; |
| 133 | } |
| 134 | @end |
| 135 | |
| 136 | |
| 137 | // False negative. |
| 138 | // ObjC class method call through a decl with a known type. |
| 139 | // We should be able to track the type of currentClass and inline this call. |
| 140 | // Note, [self class] could be a subclass. Do we still want to inline here? |
| 141 | @interface MyClassKT : NSObject |
| 142 | @end |
| 143 | @interface MyClassKT (MyCatKT) |
| 144 | + (int)getInt; |
| 145 | @end |
| 146 | @implementation MyClassKT (MyCatKT) |
| 147 | + (int)getInt { |
| 148 | return 0; |
| 149 | } |
| 150 | @end |
| 151 | @implementation MyClassKT |
| 152 | - (int)testClassMethodByKnownVarDecl { |
| 153 | Class currentClass = [self class]; |
| 154 | int y = [currentClass getInt]; |
| 155 | return 5/y; // Would be great to get a warning here. |
| 156 | } |
| 157 | @end |
| 158 | |
| 159 | // Another false negative due to us not reasoning about self, which in this |
| 160 | // case points to the object of the class in the call site and should be equal |
| 161 | // to [MyParent class]. |
| 162 | @interface MyParentSelf : NSObject |
| 163 | + (int)testSelf; |
| 164 | @end |
| 165 | @implementation MyParentSelf |
| 166 | + (int)testSelf { |
| 167 | if (self == [MyParentSelf class]) |
| 168 | return 0; |
| 169 | else |
| 170 | return 1; |
| 171 | } |
| 172 | @end |
| 173 | @interface MyClassSelf : MyParentSelf |
| 174 | @end |
| 175 | @implementation MyClassSelf |
| 176 | + (int)testClassMethodByKnownVarDecl { |
| 177 | int y = [MyParentSelf testSelf]; |
| 178 | return 5/y; // expected-warning{{Division by zero}} |
| 179 | } |
| 180 | @end |
| 181 | int foo2() { |
| 182 | int y = [MyParentSelf testSelf]; |
| 183 | return 5/y; // expected-warning{{Division by zero}} |
| 184 | } |
| 185 | |
| 186 | // TODO: We do not inline 'getNum' in the following case, where the value of |
| 187 | // 'self' in call '[self getNum]' is available and evaualtes to |
| 188 | // 'SelfUsedInParentChild' if it's called from fooA. |
| 189 | // Self region should get created before we call foo and yje call to super |
| 190 | // should keep it live. |
| 191 | @interface SelfUsedInParent : NSObject |
| 192 | + (int)getNum; |
| 193 | + (int)foo; |
| 194 | @end |
| 195 | @implementation SelfUsedInParent |
| 196 | + (int)getNum {return 5;} |
| 197 | + (int)foo { |
| 198 | int r = [self getNum]; |
| 199 | clang_analyzer_eval(r == 5); // expected-warning{{TRUE}} |
| 200 | return r; |
| 201 | } |
| 202 | @end |
| 203 | @interface SelfUsedInParentChild : SelfUsedInParent |
| 204 | + (int)getNum; |
| 205 | + (int)fooA; |
| 206 | @end |
| 207 | @implementation SelfUsedInParentChild |
| 208 | + (int)getNum {return 0;} |
| 209 | + (int)fooA { |
| 210 | return [super foo]; |
| 211 | } |
| 212 | @end |
| 213 | int checkSelfUsedInparentClassMethod() { |
| 214 | return 5/[SelfUsedInParentChild fooA]; |
| 215 | } |
| 216 | |
| 217 | |
| 218 | @interface Rdar15037033 : NSObject |
| 219 | @end |
| 220 | |
| 221 | void rdar15037033() { |
| 222 | [Rdar15037033 forwardDeclaredMethod]; // expected-warning {{class method '+forwardDeclaredMethod' not found}} |
| 223 | [Rdar15037033 forwardDeclaredVariadicMethod:1, 2, 3, 0]; // expected-warning {{class method '+forwardDeclaredVariadicMethod:' not found}} |
| 224 | } |
| 225 | |
| 226 | @implementation Rdar15037033 |
| 227 | |
| 228 | + (void)forwardDeclaredMethod { |
| 229 | clang_analyzer_checkInlined(1); // expected-warning{{TRUE}} |
| 230 | } |
| 231 | |
| 232 | + (void)forwardDeclaredVariadicMethod:(int)x, ... { |
| 233 | clang_analyzer_checkInlined(0); // no-warning |
| 234 | } |
| 235 | @end |
| 236 | |
| 237 | @interface SelfClassTestParent : NSObject |
| 238 | -(unsigned)returns10; |
| 239 | +(unsigned)returns20; |
| 240 | +(unsigned)returns30; |
| 241 | @end |
| 242 | |
| 243 | @implementation SelfClassTestParent |
| 244 | -(unsigned)returns10 { return 100; } |
| 245 | +(unsigned)returns20 { return 100; } |
| 246 | +(unsigned)returns30 { return 100; } |
| 247 | @end |
| 248 | |
| 249 | @interface SelfClassTest : SelfClassTestParent |
| 250 | -(unsigned)returns10; |
| 251 | +(unsigned)returns20; |
| 252 | +(unsigned)returns30; |
| 253 | @end |
| 254 | |
| 255 | @implementation SelfClassTest |
| 256 | -(unsigned)returns10 { return 10; } |
| 257 | +(unsigned)returns20 { return 20; } |
| 258 | +(unsigned)returns30 { return 30; } |
| 259 | +(void)classMethod { |
| 260 | unsigned result1 = [self returns20]; |
| 261 | clang_analyzer_eval(result1 == 20); // expected-warning{{TRUE}} |
| 262 | unsigned result2 = [[self class] returns30]; |
| 263 | clang_analyzer_eval(result2 == 30); // expected-warning{{TRUE}} |
| 264 | unsigned result3 = [[super class] returns30]; |
| 265 | clang_analyzer_eval(result3 == 100); // expected-warning{{UNKNOWN}} |
| 266 | } |
| 267 | -(void)instanceMethod { |
| 268 | unsigned result0 = [self returns10]; |
| 269 | clang_analyzer_eval(result0 == 10); // expected-warning{{TRUE}} |
| 270 | unsigned result2 = [[self class] returns30]; |
| 271 | clang_analyzer_eval(result2 == 30); // expected-warning{{TRUE}} |
| 272 | unsigned result3 = [[super class] returns30]; |
| 273 | clang_analyzer_eval(result3 == 100); // expected-warning{{UNKNOWN}} |
| 274 | } |
| 275 | @end |
| 276 | |
| 277 | @interface Parent : NSObject |
| 278 | + (int)a; |
| 279 | + (int)b; |
| 280 | @end |
| 281 | @interface Child : Parent |
| 282 | @end |
| 283 | @interface Other : NSObject |
| 284 | +(void)run; |
| 285 | @end |
| 286 | int main(int argc, const char * argv[]) { |
| 287 | @autoreleasepool { |
| 288 | [Other run]; |
| 289 | } |
| 290 | return 0; |
| 291 | } |
| 292 | @implementation Other |
| 293 | +(void)run { |
| 294 | int result = [Child a]; |
| 295 | // TODO: This should return 100. |
| 296 | clang_analyzer_eval(result == 12); // expected-warning{{TRUE}} |
| 297 | } |
| 298 | @end |
| 299 | @implementation Parent |
| 300 | + (int)a; { |
| 301 | return [self b]; |
| 302 | } |
| 303 | + (int)b; { |
| 304 | return 12; |
| 305 | } |
| 306 | @end |
| 307 | @implementation Child |
| 308 | + (int)b; { |
| 309 | return 100; |
| 310 | } |
| 311 | @end |
| 312 | |