//>>SLICER // RUN: clang-cc -analyze -checker-cfref -analyzer-store=basic -verify %s && // RUN: clang-cc -analyze -checker-cfref -analyzer-store=region -verify %s #if __has_feature(attribute_ns_returns_retained) #define NS_RETURNS_RETAINED __attribute__((ns_returns_retained)) #endif #if __has_feature(attribute_cf_returns_retained) #define CF_RETURNS_RETAINED __attribute__((cf_returns_retained)) #endif //===----------------------------------------------------------------------===// // The following code is reduced using delta-debugging from Mac OS X headers: // // #include // #include // #include // #include // #include // #include // // It includes the basic definitions for the test cases below. //===----------------------------------------------------------------------===// typedef unsigned int __darwin_natural_t; typedef unsigned long uintptr_t; typedef unsigned int uint32_t; typedef unsigned long long uint64_t; typedef unsigned int UInt32; typedef signed long CFIndex; typedef const void * CFTypeRef; typedef const struct __CFString * CFStringRef; typedef const struct __CFAllocator * CFAllocatorRef; extern const CFAllocatorRef kCFAllocatorDefault; extern CFTypeRef CFRetain(CFTypeRef cf); extern void CFRelease(CFTypeRef cf); typedef struct { } CFArrayCallBacks; extern const CFArrayCallBacks kCFTypeArrayCallBacks; typedef const struct __CFArray * CFArrayRef; typedef struct __CFArray * CFMutableArrayRef; extern CFMutableArrayRef CFArrayCreateMutable(CFAllocatorRef allocator, CFIndex capacity, const CFArrayCallBacks *callBacks); extern const void *CFArrayGetValueAtIndex(CFArrayRef theArray, CFIndex idx); extern void CFArrayAppendValue(CFMutableArrayRef theArray, const void *value); typedef const struct __CFDictionary * CFDictionaryRef; typedef struct __CFDictionary * CFMutableDictionaryRef; typedef UInt32 CFStringEncoding; enum { 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 }; extern CFStringRef CFStringCreateWithCString(CFAllocatorRef alloc, const char *cStr, CFStringEncoding encoding); typedef double CFTimeInterval; typedef CFTimeInterval CFAbsoluteTime; extern CFAbsoluteTime CFAbsoluteTimeGetCurrent(void); typedef const struct __CFDate * CFDateRef; extern CFDateRef CFDateCreate(CFAllocatorRef allocator, CFAbsoluteTime at); extern CFAbsoluteTime CFDateGetAbsoluteTime(CFDateRef theDate); typedef __darwin_natural_t natural_t; typedef natural_t mach_port_name_t; typedef mach_port_name_t mach_port_t; typedef int kern_return_t; typedef kern_return_t mach_error_t; typedef signed char BOOL; typedef unsigned long NSUInteger; @class NSString, Protocol; extern void NSLog(NSString *format, ...) __attribute__((format(__NSString__, 1, 2))); typedef struct _NSZone NSZone; @class NSInvocation, NSMethodSignature, NSCoder, NSString, NSEnumerator; @protocol NSObject - (BOOL)isEqual:(id)object; - (id)retain; - (oneway void)release; - (id)autorelease; @end @protocol NSCopying - (id)copyWithZone:(NSZone *)zone; @end @protocol NSMutableCopying - (id)mutableCopyWithZone:(NSZone *)zone; @end @protocol NSCoding - (void)encodeWithCoder:(NSCoder *)aCoder; @end @interface NSObject { } + (id)allocWithZone:(NSZone *)zone; + (id)alloc; - (void)dealloc; @end extern id NSAllocateObject(Class aClass, NSUInteger extraBytes, NSZone *zone); typedef struct { } NSFastEnumerationState; @protocol NSFastEnumeration - (NSUInteger)countByEnumeratingWithState:(NSFastEnumerationState *)state objects:(id *)stackbuf count:(NSUInteger)len; @end @class NSString; @interface NSArray : NSObject - (NSUInteger)count; @end @interface NSArray (NSArrayCreation) + (id)array; @end @interface NSAutoreleasePool : NSObject { } - (void)drain; @end extern NSString * const NSBundleDidLoadNotification; typedef double NSTimeInterval; @interface NSDate : NSObject - (NSTimeInterval)timeIntervalSinceReferenceDate; @end typedef unsigned short unichar; @interface NSString : NSObject - (NSUInteger)length; - ( const char *)UTF8String; - (id)initWithUTF8String:(const char *)nullTerminatedCString; + (id)stringWithUTF8String:(const char *)nullTerminatedCString; @end @class NSString, NSData; @interface NSData : NSObject - (NSUInteger)length; + (id)dataWithBytesNoCopy:(void *)bytes length:(NSUInteger)length; + (id)dataWithBytesNoCopy:(void *)bytes length:(NSUInteger)length freeWhenDone:(BOOL)b; @end @class NSString; @interface NSDictionary : NSObject - (NSUInteger)count; @end @interface NSMutableDictionary : NSDictionary - (void)removeObjectForKey:(id)aKey; - (void)setObject:(id)anObject forKey:(id)aKey; @end @interface NSMutableDictionary (NSMutableDictionaryCreation) + (id)dictionaryWithCapacity:(NSUInteger)numItems; @end typedef double CGFloat; struct CGSize { }; typedef struct CGSize CGSize; struct CGRect { }; typedef struct CGRect CGRect; @protocol NSLocking - (void)lock; - (id)init; @end @class NSURLAuthenticationChallenge; typedef mach_port_t io_object_t; typedef char io_name_t[128]; typedef io_object_t io_iterator_t; typedef io_object_t io_service_t; typedef struct IONotificationPort * IONotificationPortRef; typedef void (*IOServiceMatchingCallback)( void * refcon, io_iterator_t iterator ); io_service_t IOServiceGetMatchingService( mach_port_t masterPort, CFDictionaryRef matching ); kern_return_t IOServiceGetMatchingServices( mach_port_t masterPort, CFDictionaryRef matching, io_iterator_t * existing ); 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)); kern_return_t IOServiceAddMatchingNotification( IONotificationPortRef notifyPort, const io_name_t notificationType, CFDictionaryRef matching, IOServiceMatchingCallback callback, void * refCon, io_iterator_t * notification ); CFMutableDictionaryRef IOServiceMatching( const char * name ); CFMutableDictionaryRef IOServiceNameMatching( const char * name ); CFMutableDictionaryRef IOBSDNameMatching( mach_port_t masterPort, uint32_t options, const char * bsdName ); CFMutableDictionaryRef IOOpenFirmwarePathMatching( mach_port_t masterPort, uint32_t options, const char * path ); CFMutableDictionaryRef IORegistryEntryIDMatching( uint64_t entryID ); typedef struct __DASession * DASessionRef; extern DASessionRef DASessionCreate( CFAllocatorRef allocator ); typedef struct __DADisk * DADiskRef; extern DADiskRef DADiskCreateFromBSDName( CFAllocatorRef allocator, DASessionRef session, const char * name ); extern DADiskRef DADiskCreateFromIOMedia( CFAllocatorRef allocator, DASessionRef session, io_service_t media ); extern CFDictionaryRef DADiskCopyDescription( DADiskRef disk ); extern DADiskRef DADiskCopyWholeDisk( DADiskRef disk ); typedef struct CGColorSpace *CGColorSpaceRef; typedef struct CGImage *CGImageRef; typedef struct CGLayer *CGLayerRef; @class NSArray, NSError, NSEvent, NSMenu, NSUndoManager, NSWindow; @interface NSResponder : NSObject { } @end @protocol NSAnimatablePropertyContainer - (id)animator; @end extern NSString *NSAnimationTriggerOrderIn ; @interface NSView : NSResponder { struct __VFlags2 { } _vFlags2; } @end extern NSString * const NSFullScreenModeAllScreens; @protocol NSChangeSpelling - (void)changeSpelling:(id)sender; @end @protocol NSIgnoreMisspelledWords - (void)ignoreSpelling:(id)sender; @end @class NSColor, NSFont, NSNotification; @interface NSText : NSView { } @end @protocol NSValidatedUserInterfaceItem - (SEL)action; @end @protocol NSUserInterfaceValidations - (BOOL)validateUserInterfaceItem:(id )anItem; @end @class NSArray, NSError, NSImage, NSView, NSNotificationCenter, NSURL, NSScreen, NSRunningApplication; @interface NSApplication : NSResponder { } @end enum { NSTerminateCancel = 0, NSTerminateNow = 1, NSTerminateLater = 2 }; typedef NSUInteger NSApplicationTerminateReply; @protocol NSApplicationDelegate @optional - (NSApplicationTerminateReply)applicationShouldTerminate:(NSApplication *)sender; @end enum { } _CFlags; @interface CIImage : NSObject { } typedef int CIFormat; @end enum { kDAReturnSuccess = 0, kDAReturnError = (((0x3e)&0x3f)<<26) | (((0x368)&0xfff)<<14) | 0x01, kDAReturnBusy = (((0x3e)&0x3f)<<26) | (((0x368)&0xfff)<<14) | 0x02, kDAReturnBadArgument = (((0x3e)&0x3f)<<26) | (((0x368)&0xfff)<<14) | 0x03, kDAReturnExclusiveAccess = (((0x3e)&0x3f)<<26) | (((0x368)&0xfff)<<14) | 0x04, kDAReturnNoResources = (((0x3e)&0x3f)<<26) | (((0x368)&0xfff)<<14) | 0x05, kDAReturnNotFound = (((0x3e)&0x3f)<<26) | (((0x368)&0xfff)<<14) | 0x06, kDAReturnNotMounted = (((0x3e)&0x3f)<<26) | (((0x368)&0xfff)<<14) | 0x07, kDAReturnNotPermitted = (((0x3e)&0x3f)<<26) | (((0x368)&0xfff)<<14) | 0x08, kDAReturnNotPrivileged = (((0x3e)&0x3f)<<26) | (((0x368)&0xfff)<<14) | 0x09, kDAReturnNotReady = (((0x3e)&0x3f)<<26) | (((0x368)&0xfff)<<14) | 0x0A, kDAReturnNotWritable = (((0x3e)&0x3f)<<26) | (((0x368)&0xfff)<<14) | 0x0B, kDAReturnUnsupported = (((0x3e)&0x3f)<<26) | (((0x368)&0xfff)<<14) | 0x0C }; typedef mach_error_t DAReturn; typedef const struct __DADissenter * DADissenterRef; extern DADissenterRef DADissenterCreate( CFAllocatorRef allocator, DAReturn status, CFStringRef string ); @interface CIContext: NSObject { } - (CGImageRef)createCGImage:(CIImage *)im fromRect:(CGRect)r; - (CGImageRef)createCGImage:(CIImage *)im fromRect:(CGRect)r format:(CIFormat)f colorSpace:(CGColorSpaceRef)cs; - (CGLayerRef)createCGLayerWithSize:(CGSize)size info:(CFDictionaryRef)d; @end @class NSURL; @protocol QCCompositionRenderer - (NSDictionary*) attributes; @end @interface QCRenderer : NSObject { } - (id) createSnapshotImageOfType:(NSString*)type; @end extern NSString* const QCViewDidStartRenderingNotification; @interface QCView : NSView { } - (id) createSnapshotImageOfType:(NSString*)type; @end enum { ICEXIFOrientation1 = 1, ICEXIFOrientation2 = 2, ICEXIFOrientation3 = 3, ICEXIFOrientation4 = 4, ICEXIFOrientation5 = 5, ICEXIFOrientation6 = 6, ICEXIFOrientation7 = 7, ICEXIFOrientation8 = 8, }; @class ICDevice; @protocol ICDeviceDelegate @required - (void)didRemoveDevice:(ICDevice*)device; @end @class ICCameraDevice; @class ICScannerDevice; @protocol ICScannerDeviceDelegate @optional - (void)scannerDeviceDidBecomeAvailable:(ICScannerDevice*)scanner; @end //===----------------------------------------------------------------------===// // Test cases. //===----------------------------------------------------------------------===// CFAbsoluteTime f1() { CFAbsoluteTime t = CFAbsoluteTimeGetCurrent(); CFDateRef date = CFDateCreate(0, t); CFRetain(date); CFRelease(date); CFDateGetAbsoluteTime(date); // no-warning CFRelease(date); t = CFDateGetAbsoluteTime(date); // expected-warning{{Reference-counted object is used after it is released.}} return t; } CFAbsoluteTime f2() { CFAbsoluteTime t = CFAbsoluteTimeGetCurrent(); CFDateRef date = CFDateCreate(0, t); [((NSDate*) date) retain]; CFRelease(date); CFDateGetAbsoluteTime(date); // no-warning [((NSDate*) date) release]; t = CFDateGetAbsoluteTime(date); // expected-warning{{Reference-counted object is used after it is released.}} return t; } NSDate* global_x; // Test to see if we supresss an error when we store the pointer // to a global. CFAbsoluteTime f3() { CFAbsoluteTime t = CFAbsoluteTimeGetCurrent(); CFDateRef date = CFDateCreate(0, t); [((NSDate*) date) retain]; CFRelease(date); CFDateGetAbsoluteTime(date); // no-warning global_x = (NSDate*) date; [((NSDate*) date) release]; t = CFDateGetAbsoluteTime(date); // no-warning return t; } //--------------------------------------------------------------------------- // Test case 'f4' differs for region store and basic store. See // retain-release-region-store.m and retain-release-basic-store.m. //--------------------------------------------------------------------------- // Test a leak. CFAbsoluteTime f5(int x) { CFAbsoluteTime t = CFAbsoluteTimeGetCurrent(); CFDateRef date = CFDateCreate(0, t); // expected-warning{{leak}} if (x) CFRelease(date); return t; } // Test a leak involving the return. CFDateRef f6(int x) { CFDateRef date = CFDateCreate(0, CFAbsoluteTimeGetCurrent()); // expected-warning{{leak}} CFRetain(date); return date; } // Test a leak involving an overwrite. CFDateRef f7() { CFDateRef date = CFDateCreate(0, CFAbsoluteTimeGetCurrent()); //expected-warning{{leak}} CFRetain(date); date = CFDateCreate(0, CFAbsoluteTimeGetCurrent()); return date; } // Generalization of Create rule. MyDateCreate returns a CFXXXTypeRef, and // has the word create. CFDateRef MyDateCreate(); CFDateRef f8() { CFDateRef date = MyDateCreate(); // expected-warning{{leak}} CFRetain(date); return date; } CFDateRef f9() { CFDateRef date = CFDateCreate(0, CFAbsoluteTimeGetCurrent()); int *p = 0; // When allocations fail, CFDateCreate can return null. if (!date) *p = 1; // expected-warning{{null}} return date; } // Handle DiskArbitration API: // // http://developer.apple.com/DOCUMENTATION/DARWIN/Reference/DiscArbitrationFramework/ // void f10(io_service_t media, DADiskRef d, CFStringRef s) { DADiskRef disk = DADiskCreateFromBSDName(kCFAllocatorDefault, 0, "hello"); // expected-warning{{leak}} if (disk) NSLog(@"ok"); disk = DADiskCreateFromIOMedia(kCFAllocatorDefault, 0, media); // expected-warning{{leak}} if (disk) NSLog(@"ok"); CFDictionaryRef dict = DADiskCopyDescription(d); // expected-warning{{leak}} if (dict) NSLog(@"ok"); disk = DADiskCopyWholeDisk(d); // expected-warning{{leak}} if (disk) NSLog(@"ok"); DADissenterRef dissenter = DADissenterCreate(kCFAllocatorDefault, // expected-warning{{leak}} kDAReturnSuccess, s); if (dissenter) NSLog(@"ok"); DASessionRef session = DASessionCreate(kCFAllocatorDefault); // expected-warning{{leak}} if (session) NSLog(@"ok"); } // Test retain/release checker with CFString and CFMutableArray. void f11() { // Create the array. CFMutableArrayRef A = CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks); // Create a string. CFStringRef s1 = CFStringCreateWithCString(0, "hello world", kCFStringEncodingUTF8); // Add the string to the array. CFArrayAppendValue(A, s1); // Decrement the reference count. CFRelease(s1); // no-warning // Get the string. We don't own it. s1 = (CFStringRef) CFArrayGetValueAtIndex(A, 0); // Release the array. CFRelease(A); // no-warning // Release the string. This is a bug. CFRelease(s1); // expected-warning{{Incorrect decrement of the reference count}} } // PR 3337: Handle functions declared using typedefs. typedef CFTypeRef CREATEFUN(); CREATEFUN MyCreateFun; void f12() { CFTypeRef o = MyCreateFun(); // expected-warning {{leak}} } void f13_autorelease() { CFMutableArrayRef A = CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks); // no-warning [(id) A autorelease]; // no-warning } void f13_autorelease_b() { CFMutableArrayRef A = CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks); [(id) A autorelease]; [(id) A autorelease]; // expected-warning{{Object sent -autorelease too many times}} } CFMutableArrayRef f13_autorelease_c() { CFMutableArrayRef A = CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks); [(id) A autorelease]; [(id) A autorelease]; return A; // expected-warning{{Object sent -autorelease too many times}} } CFMutableArrayRef f13_autorelease_d() { CFMutableArrayRef A = CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks); [(id) A autorelease]; [(id) A autorelease]; CFMutableArrayRef B = CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks); // expected-warning{{Object sent -autorelease too many times}} CFRelease(B); // no-warning while (1) {} } // This case exercises the logic where the leak site is the same as the allocation site. void f14_leakimmediately() { CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks); // expected-warning{{leak}} } // Test that we track an allocated object beyond the point where the *name* // of the variable storing the reference is no longer live. void f15() { // Create the array. CFMutableArrayRef A = CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks); CFMutableArrayRef *B = &A; // At this point, the name 'A' is no longer live. CFRelease(*B); // no-warning } // Test when we pass NULL to CFRetain/CFRelease. void f16(int x, CFTypeRef p) { if (p) return; if (x) { CFRelease(p); // expected-warning{{Null pointer argument in call to CFRelease}} } else { CFRetain(p); // expected-warning{{Null pointer argument in call to CFRetain}} } } // Test basic tracking of ivars associated with 'self'. For the retain/release // checker we currently do not want to flag leaks associated with stores // of tracked objects to ivars. @interface SelfIvarTest : NSObject { id myObj; } - (void)test_self_tracking; @end @implementation SelfIvarTest - (void)test_self_tracking { myObj = (id) CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks); // no-warning } @end // Test return of non-owned objects in contexts where an owned object // is expected. @interface TestReturnNotOwnedWhenExpectedOwned - (NSString*)newString; @end @implementation TestReturnNotOwnedWhenExpectedOwned - (NSString*)newString { NSString *s = [NSString stringWithUTF8String:"hello"]; return s; // expected-warning{{Object with +0 retain counts returned to caller where a +1 (owning) retain count is expected}} } @end // int isFoo(char c); static void rdar_6659160(char *inkind, char *inname) { // We currently expect that [NSObject alloc] cannot fail. This // will be a toggled flag in the future. It can indeed return null, but // Cocoa programmers generally aren't expected to reason about out-of-memory // conditions. NSString *kind = [[NSString alloc] initWithUTF8String:inkind]; // expected-warning{{leak}} // We do allow stringWithUTF8String to fail. This isn't really correct, as // far as returning 0. In most error conditions it will throw an exception. // If allocation fails it could return 0, but again this // isn't expected. NSString *name = [NSString stringWithUTF8String:inname]; if(!name) return; const char *kindC = 0; const char *nameC = 0; // In both cases, we cannot reach a point down below where we // dereference kindC or nameC with either being null. This is because // we assume that [NSObject alloc] doesn't fail and that we have the guard // up above. if(kind) kindC = [kind UTF8String]; if(name) nameC = [name UTF8String]; if(!isFoo(kindC[0])) // expected-warning{{null}} return; if(!isFoo(nameC[0])) // no-warning return; [kind release]; [name release]; // expected-warning{{Incorrect decrement of the reference count}} } // PR 3677 - 'allocWithZone' should be treated as following the Cocoa naming // conventions with respect to 'return'ing ownership. @interface PR3677: NSObject @end @implementation PR3677 + (id)allocWithZone:(NSZone *)inZone { return [super allocWithZone:inZone]; // no-warning } @end // PR 3820 - Reason about calls to -dealloc void pr3820_DeallocInsteadOfRelease(void) { id foo = [[NSString alloc] init]; // no-warning [foo dealloc]; // foo is not leaked, since it has been deallocated. } void pr3820_ReleaseAfterDealloc(void) { id foo = [[NSString alloc] init]; [foo dealloc]; [foo release]; // expected-warning{{used after it is release}} // NSInternalInconsistencyException: message sent to deallocated object } void pr3820_DeallocAfterRelease(void) { NSLog(@"\n\n[%s]", __FUNCTION__); id foo = [[NSString alloc] init]; [foo release]; [foo dealloc]; // expected-warning{{used after it is released}} // message sent to released object } // From . The problem here is that 'length' binds to // '($0 - 1)' after '--length', but SimpleConstraintManager doesn't know how to // reason about '($0 - 1) > constant'. As a temporary hack, we drop the value // of '($0 - 1)' and conjure a new symbol. void rdar6704930(unsigned char *s, unsigned int length) { NSString* name = 0; if (s != 0) { if (length > 0) { while (length > 0) { if (*s == ':') { ++s; --length; name = [[NSString alloc] init]; // no-warning break; } ++s; --length; } if ((length == 0) && (name != 0)) { [name release]; name = 0; } if (length == 0) { // no ':' found -> use it all as name name = [[NSString alloc] init]; // no-warning } } } if (name != 0) { [name release]; } } //===----------------------------------------------------------------------===// // // One build of the analyzer accidentally stopped tracking the allocated // object after the 'retain'. //===----------------------------------------------------------------------===// @interface rdar_6833332 : NSObject { NSWindow *window; } @property (nonatomic, retain) NSWindow *window; @end @implementation rdar_6833332 @synthesize window; - (void)applicationDidFinishLaunching:(NSNotification *)aNotification { NSMutableDictionary *dict = [[NSMutableDictionary dictionaryWithCapacity:4] retain]; // expected-warning{{leak}} [dict setObject:@"foo" forKey:@"bar"]; NSLog(@"%@", dict); } - (void)dealloc { [window release]; [super dealloc]; } @end //===----------------------------------------------------------------------===// // clang checker fails to catch use-after-release //===----------------------------------------------------------------------===// int rdar_6257780_Case1() { NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init]; NSArray *array = [NSArray array]; [array release]; // expected-warning{{Incorrect decrement of the reference count of an object is not owned at this point by the caller}} [pool drain]; return 0; } //===----------------------------------------------------------------------===// // Checker should understand new/setObject:/release constructs //===----------------------------------------------------------------------===// void rdar_6866843() { NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init]; NSMutableDictionary* dictionary = [[NSMutableDictionary alloc] init]; NSArray* array = [[NSArray alloc] init]; [dictionary setObject:array forKey:@"key"]; [array release]; // Using 'array' here should be fine NSLog(@"array = %@\n", array); // no-warning // Now the array is released [dictionary release]; [pool drain]; } //===----------------------------------------------------------------------===// // Classes typedef-ed to CF objects should get the same treatment as CF objects //===----------------------------------------------------------------------===// typedef CFTypeRef OtherRef; @interface RDar6877235 : NSObject {} - (CFTypeRef)_copyCFTypeRef; - (OtherRef)_copyOtherRef; @end @implementation RDar6877235 - (CFTypeRef)_copyCFTypeRef { return [[NSString alloc] init]; // no-warning } - (OtherRef)_copyOtherRef { return [[NSString alloc] init]; // no-warning } @end //===----------------------------------------------------------------------===// // false positive - init method returns an object owned by caller //===----------------------------------------------------------------------===// @interface RDar6320065 : NSObject { NSString *_foo; } - (id)initReturningNewClass; - (id)initReturningNewClassBad; - (id)initReturningNewClassBad2; @end @interface RDar6320065Subclass : RDar6320065 @end @implementation RDar6320065 - (id)initReturningNewClass { [self release]; self = [[RDar6320065Subclass alloc] init]; // no-warning return self; } - (id)initReturningNewClassBad { [self release]; [[RDar6320065Subclass alloc] init]; // expected-warning {{leak}} return self; } - (id)initReturningNewClassBad2 { [self release]; self = [[RDar6320065Subclass alloc] init]; return [self autorelease]; // expected-warning{{Object with +0 retain counts returned to caller where a +1 (owning) retain count is expected}} } @end @implementation RDar6320065Subclass @end int RDar6320065_test() { RDar6320065 *test = [[RDar6320065 alloc] init]; // no-warning [test release]; return 0; } //===----------------------------------------------------------------------===// // [NSData dataWithBytesNoCopy] does not return a retained object //===----------------------------------------------------------------------===// @interface RDar6859457 : NSObject {} - (NSString*) NoCopyString; - (NSString*) noCopyString; @end @implementation RDar6859457 - (NSString*) NoCopyString { return [[NSString alloc] init]; } // no-warning - (NSString*) noCopyString { return [[NSString alloc] init]; } // no-warning @end void test_RDar6859457(RDar6859457 *x, void *bytes, NSUInteger dataLength) { [x NoCopyString]; // expected-warning{{leak}} [x noCopyString]; // expected-warning{{leak}} [NSData dataWithBytesNoCopy:bytes length:dataLength]; // no-warning [NSData dataWithBytesNoCopy:bytes length:dataLength freeWhenDone:1]; // no-warning } //===----------------------------------------------------------------------===// // PR 4230 - an autorelease pool is not necessarily leaked during a premature // return //===----------------------------------------------------------------------===// static void PR4230(void) { NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; // no-warning NSString *object = [[[NSString alloc] init] autorelease]; // no-warning return; } //===----------------------------------------------------------------------===// // Method name that has a null IdentifierInfo* for its first selector slot. // This test just makes sure that we handle it. //===----------------------------------------------------------------------===// @interface TestNullIdentifier @end @implementation TestNullIdentifier + (id):(int)x, ... { return [[NSString alloc] init]; // expected-warning{{leak}} } @end //===----------------------------------------------------------------------===// // don't flag leaks for return types that cannot be // determined to be CF types //===----------------------------------------------------------------------===// // We don't know if 'struct s6893565' represents a Core Foundation type, so // we shouldn't emit an error here. typedef struct s6893565* TD6893565; @interface RDar6893565 {} -(TD6893565)newThing; @end @implementation RDar6893565 -(TD6893565)newThing { return (TD6893565) [[NSString alloc] init]; // no-warning } @end //===----------------------------------------------------------------------===// // clang: false positives w/QC and CoreImage methods //===----------------------------------------------------------------------===// void rdar6902710(QCView *view, QCRenderer *renderer, CIContext *context, NSString *str, CIImage *img, CGRect rect, CIFormat form, CGColorSpaceRef cs) { [view createSnapshotImageOfType:str]; // expected-warning{{leak}} [renderer createSnapshotImageOfType:str]; // expected-warning{{leak}} [context createCGImage:img fromRect:rect]; // expected-warning{{leak}} [context createCGImage:img fromRect:rect format:form colorSpace:cs]; // expected-warning{{leak}} } //===----------------------------------------------------------------------===// // -[CIContext createCGLayerWithSize:info:] // misinterpreted by clang scan-build //===----------------------------------------------------------------------===// void rdar6945561(CIContext *context, CGSize size, CFDictionaryRef d) { [context createCGLayerWithSize:size info:d]; // expected-warning{{leak}} } //===----------------------------------------------------------------------===// // add knowledge of IOKit functions to retain/release // checker //===----------------------------------------------------------------------===// void IOBSDNameMatching_wrapper(mach_port_t masterPort, uint32_t options, const char * bsdName) { IOBSDNameMatching(masterPort, options, bsdName); // expected-warning{{leak}} } void IOServiceMatching_wrapper(const char * name) { IOServiceMatching(name); // expected-warning{{leak}} } void IOServiceNameMatching_wrapper(const char * name) { IOServiceNameMatching(name); // expected-warning{{leak}} } CF_RETURNS_RETAINED CFDictionaryRef CreateDict(); void IOServiceAddNotification_wrapper(mach_port_t masterPort, const io_name_t notificationType, mach_port_t wakePort, uintptr_t reference, io_iterator_t * notification ) { CFDictionaryRef matching = CreateDict(); CFRelease(matching); IOServiceAddNotification(masterPort, notificationType, matching, // expected-warning{{used after it is released}} expected-warning{{deprecated}} wakePort, reference, notification); } void IORegistryEntryIDMatching_wrapper(uint64_t entryID ) { IORegistryEntryIDMatching(entryID); // expected-warning{{leak}} } void IOOpenFirmwarePathMatching_wrapper(mach_port_t masterPort, uint32_t options, const char * path) { IOOpenFirmwarePathMatching(masterPort, options, path); // expected-warning{{leak}} } void IOServiceGetMatchingService_wrapper(mach_port_t masterPort) { CFDictionaryRef matching = CreateDict(); IOServiceGetMatchingService(masterPort, matching); CFRelease(matching); // expected-warning{{used after it is released}} } void IOServiceGetMatchingServices_wrapper(mach_port_t masterPort, io_iterator_t *existing) { CFDictionaryRef matching = CreateDict(); IOServiceGetMatchingServices(masterPort, matching, existing); CFRelease(matching); // expected-warning{{used after it is released}} } void IOServiceAddMatchingNotification_wrapper(IONotificationPortRef notifyPort, const io_name_t notificationType, IOServiceMatchingCallback callback, void * refCon, io_iterator_t * notification) { CFDictionaryRef matching = CreateDict(); IOServiceAddMatchingNotification(notifyPort, notificationType, matching, callback, refCon, notification); CFRelease(matching); // expected-warning{{used after it is released}} } //===----------------------------------------------------------------------===// // Tests of ownership attributes. //===----------------------------------------------------------------------===// typedef NSString* MyStringTy; @protocol FooP; @interface TestOwnershipAttr : NSObject - (NSString*) returnsAnOwnedString NS_RETURNS_RETAINED; // no-warning - (NSString*) returnsAnOwnedCFString CF_RETURNS_RETAINED; // no-warning - (MyStringTy) returnsAnOwnedTypedString NS_RETURNS_RETAINED; // no-warning - (int) returnsAnOwnedInt NS_RETURNS_RETAINED; // expected-warning{{'ns_returns_retained' attribute only applies to functions or methods that return a pointer or Objective-C object}} - (id) returnsOwnedProt NS_RETURNS_RETAINED; // no-warning @end static int ownership_attribute_doesnt_go_here NS_RETURNS_RETAINED; // expected-warning{{'ns_returns_retained' attribute only applies to function or method types}} void test_attr_1(TestOwnershipAttr *X) { NSString *str = [X returnsAnOwnedString]; // expected-warning{{leak}} } void test_attr_1b(TestOwnershipAttr *X) { NSString *str = [X returnsAnOwnedCFString]; // expected-warning{{leak}} } @interface MyClassTestCFAttr : NSObject {} - (NSDate*) returnsCFRetained CF_RETURNS_RETAINED; - (CFDateRef) returnsCFRetainedAsCF CF_RETURNS_RETAINED; - (NSDate*) alsoReturnsRetained; - (CFDateRef) alsoReturnsRetainedAsCF; - (NSDate*) returnsNSRetained NS_RETURNS_RETAINED; @end CF_RETURNS_RETAINED CFDateRef returnsRetainedCFDate() { return CFDateCreate(0, CFAbsoluteTimeGetCurrent()); } @implementation MyClassTestCFAttr - (NSDate*) returnsCFRetained { return (NSDate*) returnsRetainedCFDate(); // No leak. } - (CFDateRef) returnsCFRetainedAsCF { return returnsRetainedCFDate(); // No leak. } - (NSDate*) alsoReturnsRetained { return (NSDate*) returnsRetainedCFDate(); // expected-warning{{leak}} } - (CFDateRef) alsoReturnsRetainedAsCF { return returnsRetainedCFDate(); // expected-warning{{leak}} } - (NSDate*) returnsNSRetained { return (NSDate*) returnsRetainedCFDate(); // no-warning } @end