1 // RUN: %clang_cc1 -analyze -analyzer-checker=core,osx.cocoa.RetainCount,osx.cocoa.NSAutoreleasePool -analyzer-store=region -fobjc-gc-only -fblocks -verify -Wno-objc-root-class %s 2 3 //===----------------------------------------------------------------------===// 4 // Header stuff. 5 //===----------------------------------------------------------------------===// 6 7 typedef unsigned int __darwin_natural_t; 8 typedef unsigned long uintptr_t; 9 typedef unsigned int uint32_t; 10 typedef unsigned long long uint64_t; 11 typedef unsigned int UInt32; 12 typedef signed long CFIndex; 13 typedef struct { 14 CFIndex location; 15 CFIndex length; 16 } CFRange; 17 static __inline__ __attribute__((always_inline)) CFRange CFRangeMake(CFIndex loc, CFIndex len) { 18 CFRange range; 19 range.location = loc; 20 range.length = len; 21 return range; 22 } 23 typedef const void * CFTypeRef; 24 typedef const struct __CFString * CFStringRef; 25 typedef const struct __CFAllocator * CFAllocatorRef; 26 extern const CFAllocatorRef kCFAllocatorDefault; 27 extern CFTypeRef CFRetain(CFTypeRef cf); 28 extern void CFRelease(CFTypeRef cf); 29 typedef struct { 30 } 31 CFArrayCallBacks; 32 extern const CFArrayCallBacks kCFTypeArrayCallBacks; 33 typedef const struct __CFArray * CFArrayRef; 34 typedef struct __CFArray * CFMutableArrayRef; 35 extern CFMutableArrayRef CFArrayCreateMutable(CFAllocatorRef allocator, CFIndex capacity, const CFArrayCallBacks *callBacks); 36 extern const void *CFArrayGetValueAtIndex(CFArrayRef theArray, CFIndex idx); 37 extern void CFArrayAppendValue(CFMutableArrayRef theArray, const void *value); 38 typedef struct { 39 } 40 CFDictionaryKeyCallBacks; 41 extern const CFDictionaryKeyCallBacks kCFTypeDictionaryKeyCallBacks; 42 typedef struct { 43 } 44 CFDictionaryValueCallBacks; 45 extern const CFDictionaryValueCallBacks kCFTypeDictionaryValueCallBacks; 46 typedef const struct __CFDictionary * CFDictionaryRef; 47 typedef struct __CFDictionary * CFMutableDictionaryRef; 48 extern CFMutableDictionaryRef CFDictionaryCreateMutable(CFAllocatorRef allocator, CFIndex capacity, const CFDictionaryKeyCallBacks *keyCallBacks, const CFDictionaryValueCallBacks *valueCallBacks); 49 typedef UInt32 CFStringEncoding; 50 enum { 51 kCFStringEncodingMacRoman = 0, kCFStringEncodingWindowsLatin1 = 0x0500, kCFStringEncodingISOLatin1 = 0x0201, kCFStringEncodingNextStepLatin = 0x0B01, kCFStringEncodingASCII = 0x0600, kCFStringEncodingUnicode = 0x0100, kCFStringEncodingUTF8 = 0x08000100, kCFStringEncodingNonLossyASCII = 0x0BFF , kCFStringEncodingUTF16 = 0x0100, kCFStringEncodingUTF16BE = 0x10000100, kCFStringEncodingUTF16LE = 0x14000100, kCFStringEncodingUTF32 = 0x0c000100, kCFStringEncodingUTF32BE = 0x18000100, kCFStringEncodingUTF32LE = 0x1c000100 }; 52 extern CFStringRef CFStringCreateWithCString(CFAllocatorRef alloc, const char *cStr, CFStringEncoding encoding); 53 typedef double CFTimeInterval; 54 typedef CFTimeInterval CFAbsoluteTime; 55 extern CFAbsoluteTime CFAbsoluteTimeGetCurrent(void); 56 typedef const struct __CFDate * CFDateRef; 57 extern CFDateRef CFDateCreate(CFAllocatorRef allocator, CFAbsoluteTime at); 58 extern CFAbsoluteTime CFDateGetAbsoluteTime(CFDateRef theDate); 59 typedef __darwin_natural_t natural_t; 60 typedef natural_t mach_port_name_t; 61 typedef mach_port_name_t mach_port_t; 62 typedef int kern_return_t; 63 typedef kern_return_t mach_error_t; 64 enum { 65 kCFNumberSInt8Type = 1, kCFNumberSInt16Type = 2, kCFNumberSInt32Type = 3, kCFNumberSInt64Type = 4, kCFNumberFloat32Type = 5, kCFNumberFloat64Type = 6, kCFNumberCharType = 7, kCFNumberShortType = 8, kCFNumberIntType = 9, kCFNumberLongType = 10, kCFNumberLongLongType = 11, kCFNumberFloatType = 12, kCFNumberDoubleType = 13, kCFNumberCFIndexType = 14, kCFNumberNSIntegerType = 15, kCFNumberCGFloatType = 16, kCFNumberMaxType = 16 }; 66 typedef CFIndex CFNumberType; 67 typedef const struct __CFNumber * CFNumberRef; 68 extern CFNumberRef CFNumberCreate(CFAllocatorRef allocator, CFNumberType theType, const void *valuePtr); 69 typedef const struct __CFAttributedString *CFAttributedStringRef; 70 typedef struct __CFAttributedString *CFMutableAttributedStringRef; 71 extern CFAttributedStringRef CFAttributedStringCreate(CFAllocatorRef alloc, CFStringRef str, CFDictionaryRef attributes) ; 72 extern CFMutableAttributedStringRef CFAttributedStringCreateMutableCopy(CFAllocatorRef alloc, CFIndex maxLength, CFAttributedStringRef aStr) ; 73 extern void CFAttributedStringSetAttribute(CFMutableAttributedStringRef aStr, CFRange range, CFStringRef attrName, CFTypeRef value) ; 74 typedef signed char BOOL; 75 typedef unsigned long NSUInteger; 76 @class NSString, Protocol; 77 extern void NSLog(NSString *format, ...) __attribute__((format(__NSString__, 1, 2))); 78 typedef struct _NSZone NSZone; 79 @class NSInvocation, NSMethodSignature, NSCoder, NSString, NSEnumerator; 80 @protocol NSObject 81 - (BOOL)isEqual:(id)object; 82 - (id)retain; 83 - (oneway void)release; 84 - (id)autorelease; 85 - (Class)class; 86 @end @protocol NSCopying - (id)copyWithZone:(NSZone *)zone; 87 @end @protocol NSMutableCopying - (id)mutableCopyWithZone:(NSZone *)zone; 88 @end @protocol NSCoding - (void)encodeWithCoder:(NSCoder *)aCoder; 89 @end 90 @interface NSObject <NSObject> {} 91 + (id)allocWithZone:(NSZone *)zone; 92 + (id)alloc; 93 - (void)dealloc; 94 - (oneway void)release; 95 - (id)copy; 96 @end 97 @interface NSObject (NSCoderMethods) 98 - (id)awakeAfterUsingCoder:(NSCoder *)aDecoder; 99 @end 100 extern id NSAllocateObject(Class aClass, NSUInteger extraBytes, NSZone *zone); 101 typedef struct { 102 } 103 NSFastEnumerationState; 104 @protocol NSFastEnumeration - (NSUInteger)countByEnumeratingWithState:(NSFastEnumerationState *)state objects:(id *)stackbuf count:(NSUInteger)len; 105 @end @class NSString, NSDictionary; 106 @interface NSValue : NSObject <NSCopying, NSCoding> - (void)getValue:(void *)value; 107 @end @interface NSNumber : NSValue - (char)charValue; 108 - (id)initWithInt:(int)value; 109 @end @class NSString; 110 @interface NSArray : NSObject <NSCopying, NSMutableCopying, NSCoding, NSFastEnumeration> 111 - (NSUInteger)count; 112 @end 113 @interface NSArray (NSArrayCreation) 114 + (id)array; 115 + (id)arrayWithObjects:(const id [])objects count:(NSUInteger)cnt; 116 @end 117 @interface NSAutoreleasePool : NSObject { 118 } 119 - (void)drain; 120 - (id)init; 121 @end extern NSString * const NSBundleDidLoadNotification; 122 typedef double NSTimeInterval; 123 @interface NSDate : NSObject <NSCopying, NSCoding> - (NSTimeInterval)timeIntervalSinceReferenceDate; 124 @end typedef unsigned short unichar; 125 @interface NSString : NSObject <NSCopying, NSMutableCopying, NSCoding> - (NSUInteger)length; 126 - ( const char *)UTF8String; 127 - (id)initWithUTF8String:(const char *)nullTerminatedCString; 128 + (id)stringWithUTF8String:(const char *)nullTerminatedCString; 129 @end @class NSString, NSURL, NSError; 130 @interface NSData : NSObject <NSCopying, NSMutableCopying, NSCoding> - (NSUInteger)length; 131 + (id)dataWithBytesNoCopy:(void *)bytes length:(NSUInteger)length; 132 + (id)dataWithBytesNoCopy:(void *)bytes length:(NSUInteger)length freeWhenDone:(BOOL)b; 133 @end @class NSLocale, NSDate, NSCalendar, NSTimeZone, NSError, NSArray, NSMutableDictionary; 134 @interface NSDictionary : NSObject <NSCopying, NSMutableCopying, NSCoding, NSFastEnumeration> - (NSUInteger)count; 135 @end @interface NSMutableDictionary : NSDictionary - (void)removeObjectForKey:(id)aKey; 136 - (void)setObject:(id)anObject forKey:(id)aKey; 137 @end @interface NSMutableDictionary (NSMutableDictionaryCreation) + (id)dictionaryWithCapacity:(NSUInteger)numItems; 138 @end typedef double CGFloat; 139 struct CGSize { 140 }; 141 typedef struct CGSize CGSize; 142 struct CGRect { 143 }; 144 typedef struct CGRect CGRect; 145 typedef mach_port_t io_object_t; 146 typedef char io_name_t[128]; 147 typedef io_object_t io_iterator_t; 148 typedef io_object_t io_service_t; 149 typedef struct IONotificationPort * IONotificationPortRef; 150 typedef void (*IOServiceMatchingCallback)( void * refcon, io_iterator_t iterator ); 151 io_service_t IOServiceGetMatchingService( mach_port_t masterPort, CFDictionaryRef matching ); 152 kern_return_t IOServiceGetMatchingServices( mach_port_t masterPort, CFDictionaryRef matching, io_iterator_t * existing ); 153 kern_return_t IOServiceAddNotification( mach_port_t masterPort, const io_name_t notificationType, CFDictionaryRef matching, mach_port_t wakePort, uintptr_t reference, io_iterator_t * notification ) __attribute__((deprecated)); 154 kern_return_t IOServiceAddMatchingNotification( IONotificationPortRef notifyPort, const io_name_t notificationType, CFDictionaryRef matching, IOServiceMatchingCallback callback, void * refCon, io_iterator_t * notification ); 155 CFMutableDictionaryRef IOServiceMatching( const char * name ); 156 CFMutableDictionaryRef IOServiceNameMatching( const char * name ); 157 CFMutableDictionaryRef IOBSDNameMatching( mach_port_t masterPort, uint32_t options, const char * bsdName ); 158 CFMutableDictionaryRef IOOpenFirmwarePathMatching( mach_port_t masterPort, uint32_t options, const char * path ); 159 CFMutableDictionaryRef IORegistryEntryIDMatching( uint64_t entryID ); 160 typedef struct __DASession * DASessionRef; 161 extern DASessionRef DASessionCreate( CFAllocatorRef allocator ); 162 typedef struct __DADisk * DADiskRef; 163 extern DADiskRef DADiskCreateFromBSDName( CFAllocatorRef allocator, DASessionRef session, const char * name ); 164 extern DADiskRef DADiskCreateFromIOMedia( CFAllocatorRef allocator, DASessionRef session, io_service_t media ); 165 extern CFDictionaryRef DADiskCopyDescription( DADiskRef disk ); 166 extern DADiskRef DADiskCopyWholeDisk( DADiskRef disk ); 167 @interface NSTask : NSObject - (id)init; 168 @end typedef struct CGColorSpace *CGColorSpaceRef; 169 typedef struct CGImage *CGImageRef; 170 typedef struct CGLayer *CGLayerRef; 171 @interface NSResponder : NSObject <NSCoding> { 172 } 173 @end @protocol NSAnimatablePropertyContainer - (id)animator; 174 @end extern NSString *NSAnimationTriggerOrderIn ; 175 @interface NSView : NSResponder <NSAnimatablePropertyContainer> { 176 } 177 @end @protocol NSValidatedUserInterfaceItem - (SEL)action; 178 @end @protocol NSUserInterfaceValidations - (BOOL)validateUserInterfaceItem:(id <NSValidatedUserInterfaceItem>)anItem; 179 @end @class NSDate, NSDictionary, NSError, NSException, NSNotification; 180 @interface NSApplication : NSResponder <NSUserInterfaceValidations> { 181 } 182 @end enum { 183 NSTerminateCancel = 0, NSTerminateNow = 1, NSTerminateLater = 2 }; 184 typedef NSUInteger NSApplicationTerminateReply; 185 @protocol NSApplicationDelegate <NSObject> @optional - (NSApplicationTerminateReply)applicationShouldTerminate:(NSApplication *)sender; 186 @end @class NSAttributedString, NSEvent, NSFont, NSFormatter, NSImage, NSMenu, NSText, NSView, NSTextView; 187 @interface NSCell : NSObject <NSCopying, NSCoding> { 188 } 189 @end @class NSTextField, NSPanel, NSArray, NSWindow, NSImage, NSButton, NSError; 190 typedef struct { 191 } 192 CVTimeStamp; 193 @interface CIImage : NSObject <NSCoding, NSCopying> { 194 } 195 typedef int CIFormat; 196 @end enum { 197 kDAReturnSuccess = 0, kDAReturnError = (((0x3eU)&0x3f)<<26) | (((0x368)&0xfff)<<14) | 0x01, kDAReturnBusy = (((0x3eU)&0x3f)<<26) | (((0x368)&0xfff)<<14) | 0x02, kDAReturnBadArgument = (((0x3eU)&0x3f)<<26) | (((0x368)&0xfff)<<14) | 0x03, kDAReturnExclusiveAccess = (((0x3eU)&0x3f)<<26) | (((0x368)&0xfff)<<14) | 0x04, kDAReturnNoResources = (((0x3eU)&0x3f)<<26) | (((0x368)&0xfff)<<14) | 0x05, kDAReturnNotFound = (((0x3eU)&0x3f)<<26) | (((0x368)&0xfff)<<14) | 0x06, kDAReturnNotMounted = (((0x3eU)&0x3f)<<26) | (((0x368)&0xfff)<<14) | 0x07, kDAReturnNotPermitted = (((0x3eU)&0x3f)<<26) | (((0x368)&0xfff)<<14) | 0x08, kDAReturnNotPrivileged = (((0x3eU)&0x3f)<<26) | (((0x368)&0xfff)<<14) | 0x09, kDAReturnNotReady = (((0x3eU)&0x3f)<<26) | (((0x368)&0xfff)<<14) | 0x0A, kDAReturnNotWritable = (((0x3eU)&0x3f)<<26) | (((0x368)&0xfff)<<14) | 0x0B, kDAReturnUnsupported = (((0x3eU)&0x3f)<<26) | (((0x368)&0xfff)<<14) | 0x0C }; 198 typedef mach_error_t DAReturn; 199 typedef const struct __DADissenter * DADissenterRef; 200 extern DADissenterRef DADissenterCreate( CFAllocatorRef allocator, DAReturn status, CFStringRef string ); 201 @interface CIContext: NSObject { 202 } 203 - (CGImageRef)createCGImage:(CIImage *)im fromRect:(CGRect)r; 204 - (CGImageRef)createCGImage:(CIImage *)im fromRect:(CGRect)r format:(CIFormat)f colorSpace:(CGColorSpaceRef)cs; 205 - (CGLayerRef)createCGLayerWithSize:(CGSize)size info:(CFDictionaryRef)d; 206 @end extern NSString* const QCRendererEventKey; 207 @protocol QCCompositionRenderer - (NSDictionary*) attributes; 208 @end @interface QCRenderer : NSObject <QCCompositionRenderer> { 209 } 210 - (id) createSnapshotImageOfType:(NSString*)type; 211 @end extern NSString* const QCViewDidStartRenderingNotification; 212 @interface QCView : NSView <QCCompositionRenderer> { 213 } 214 - (id) createSnapshotImageOfType:(NSString*)type; 215 @end enum { 216 ICEXIFOrientation1 = 1, ICEXIFOrientation2 = 2, ICEXIFOrientation3 = 3, ICEXIFOrientation4 = 4, ICEXIFOrientation5 = 5, ICEXIFOrientation6 = 6, ICEXIFOrientation7 = 7, ICEXIFOrientation8 = 8, }; 217 @class ICDevice; 218 @protocol ICDeviceDelegate <NSObject> @required - (void)didRemoveDevice:(ICDevice*)device; 219 @end extern NSString *const ICScannerStatusWarmingUp; 220 @class ICScannerDevice; 221 @protocol ICScannerDeviceDelegate <ICDeviceDelegate> @optional - (void)scannerDeviceDidBecomeAvailable:(ICScannerDevice*)scanner; 222 @end 223 CFTypeRef CFMakeCollectable(CFTypeRef cf) ; 224 225 static __inline__ __attribute__((always_inline)) id NSMakeCollectable(CFTypeRef 226 cf) { 227 return cf ? (id)CFMakeCollectable(cf) : ((void*)0); 228 } 229 230 //===----------------------------------------------------------------------===// 231 // Test cases. 232 //===----------------------------------------------------------------------===// 233 234 void f1() { 235 CFMutableArrayRef A = CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks); // no-warning 236 id x = [(id) A autorelease]; 237 CFRelease((CFMutableArrayRef) x); 238 } 239 240 void f2() { 241 CFMutableArrayRef A = CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks); // expected-warning{{leak}} 242 id x = [(id) A retain]; 243 [x release]; 244 [x release]; 245 } 246 247 void f3() { 248 CFMutableArrayRef A = CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks); // expected-warning{{leak}} 249 CFMakeCollectable(A); 250 CFRetain(A); 251 } 252 253 void f3b() { 254 CFMutableArrayRef A = CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks); // no-warning 255 CFMakeCollectable(A); 256 } 257 258 259 void f4() { 260 CFMutableArrayRef A = CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks); // expected-warning{{leak}} 261 NSMakeCollectable(A); 262 CFRetain(A); 263 } 264 265 void f4b() { 266 CFMutableArrayRef A = CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks); // no-warning 267 NSMakeCollectable(A); 268 } 269 270 void f5() { 271 id x = [NSMakeCollectable(CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks)) autorelease]; // no-warning 272 } 273 274 void f5b() { 275 id x = [(id) CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks) autorelease]; // expected-warning{{leak}} 276 } 277 278 // Test return of non-owned objects in contexts where an owned object 279 // is expected. 280 @interface TestReturnNotOwnedWhenExpectedOwned 281 - (NSString*)newString; 282 - (CFMutableArrayRef)newArray; 283 @end 284 285 @implementation TestReturnNotOwnedWhenExpectedOwned 286 - (NSString*)newString { 287 NSString *s = [NSString stringWithUTF8String:"hello"]; // expected-warning{{Potential leak (when using garbage collection) of an object}} 288 CFRetain(s); 289 return s; 290 } 291 - (CFMutableArrayRef)newArray{ 292 return CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks); // no-warning 293 } 294 @end 295 296 //===----------------------------------------------------------------------===// 297 // <rdar://problem/6948053> False positive: object substitution during -init* 298 // methods warns about returning +0 when using -fobjc-gc-only 299 //===----------------------------------------------------------------------===// 300 301 @interface MyClassRdar6948053 : NSObject 302 - (id) init; 303 + (id) shared; 304 @end 305 306 @implementation MyClassRdar6948053 307 +(id) shared { 308 return (id) 0; 309 } 310 - (id) init 311 { 312 Class myClass = [self class]; 313 [self release]; 314 return [[myClass shared] retain]; // no-warning 315 } 316 @end 317 318 //===----------------------------------------------------------------------===// 319 // <rdar://problem/7174400> 'ciContext createCGImage:outputImage fromRect:' returns a retained CF object (not GC'ed)//===----------------------------------------------------------------------===// 320 //===----------------------------------------------------------------------===// 321 322 void rdar_7174400(QCView *view, QCRenderer *renderer, CIContext *context, 323 NSString *str, CIImage *img, CGRect rect, 324 CIFormat form, CGColorSpaceRef cs) { 325 [view createSnapshotImageOfType:str]; // no-warning 326 [renderer createSnapshotImageOfType:str]; // no-warning 327 [context createCGImage:img fromRect:rect]; // expected-warning{{leak}} 328 [context createCGImage:img fromRect:rect format:form colorSpace:cs]; // expected-warning{{leak}} 329 } 330 331 //===----------------------------------------------------------------------===// 332 // <rdar://problem/6250216> Warn against using -[NSAutoreleasePool release] in 333 // GC mode 334 //===----------------------------------------------------------------------===// 335 336 void rdar_6250216(void) { 337 NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init]; 338 [pool release]; // expected-warning{{Use -drain instead of -release when using NSAutoreleasePool and garbage collection}} 339 } 340 341 342 //===----------------------------------------------------------------------===// 343 // <rdar://problem/7407273> Don't crash when analyzing messages sent to blocks 344 //===----------------------------------------------------------------------===// 345 346 @class RDar7407273; 347 typedef void (^RDar7407273Block)(RDar7407273 *operation); 348 void rdar7407273(RDar7407273Block b) { 349 [b copy]; 350 } 351 352 //===----------------------------------------------------------------------===// 353 // Tests of ownership attributes. 354 //===----------------------------------------------------------------------===// 355 356 @interface TestOwnershipAttr : NSObject 357 - (NSString*) returnsAnOwnedString __attribute__((ns_returns_retained)); 358 - (NSString*) returnsAnOwnedCFString __attribute__((cf_returns_retained)); 359 @end 360 361 void test_attr_1(TestOwnershipAttr *X) { 362 NSString *str = [X returnsAnOwnedString]; // no-warning 363 } 364 365 void test_attr_1b(TestOwnershipAttr *X) { 366 NSString *str = [X returnsAnOwnedCFString]; // expected-warning{{leak}} 367 } 368 369 @interface MyClassTestCFAttr : NSObject {} 370 - (NSDate*) returnsCFRetained __attribute__((cf_returns_retained)); 371 - (NSDate*) alsoReturnsRetained; 372 - (NSDate*) returnsNSRetained __attribute__((ns_returns_retained)); 373 @end 374 375 __attribute__((cf_returns_retained)) 376 CFDateRef returnsRetainedCFDate() { 377 return CFDateCreate(0, CFAbsoluteTimeGetCurrent()); 378 } 379 380 @implementation MyClassTestCFAttr 381 - (NSDate*) returnsCFRetained { 382 return (NSDate*) returnsRetainedCFDate(); // No leak. 383 } 384 385 - (NSDate*) alsoReturnsRetained { 386 return (NSDate*) returnsRetainedCFDate(); // expected-warning{{leak}} 387 } 388 389 - (NSDate*) returnsNSRetained { 390 return (NSDate*) returnsRetainedCFDate(); // expected-warning{{leak}} 391 } 392 @end 393 394 395 #if __has_feature(attribute_ns_consumed) 396 #define NS_CONSUMED __attribute__((ns_consumed)) 397 #endif 398 #if __has_feature(attribute_cf_consumed) 399 #define CF_CONSUMED __attribute__((cf_consumed)) 400 #endif 401 402 void consumeAndStopTracking(id NS_CONSUMED obj, void (^callback)(void)); 403 void CFConsumeAndStopTracking(CFTypeRef CF_CONSUMED obj, void (^callback)(void)); 404 405 void testConsumeAndStopTracking() { 406 id retained = [@[] retain]; // +0, GC 407 consumeAndStopTracking(retained, ^{}); // no-warning 408 409 id doubleRetained = [[@[] retain] retain]; // +0, GC 410 consumeAndStopTracking(doubleRetained, ^{ 411 [doubleRetained release]; 412 }); // no-warning 413 414 id unretained = @[]; // +0 415 consumeAndStopTracking(unretained, ^{}); // no-warning, GC 416 } 417 418 void testCFConsumeAndStopTrackingMsg() { 419 id retained = [@[] retain]; // +0, GC 420 CFConsumeAndStopTracking((CFTypeRef)retained, ^{}); // expected-warning {{Incorrect decrement of the reference count of an object that is not owned at this point by the caller}} 421 } 422 423 void testCFConsumeAndStopTracking() { 424 CFTypeRef retained = returnsRetainedCFDate(); // +1 425 CFConsumeAndStopTracking(retained, ^{}); // no-warning 426 427 CFTypeRef doubleRetained = CFRetain(returnsRetainedCFDate()); // +2 428 CFConsumeAndStopTracking(doubleRetained, ^{ 429 CFRelease(doubleRetained); 430 }); // no-warning 431 432 id unretained = @[]; // +0 433 CFConsumeAndStopTracking((CFTypeRef)unretained, ^{}); // expected-warning {{Incorrect decrement of the reference count of an object that is not owned at this point by the caller}} 434 } 435
