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Diffstat (limited to 'test/Analysis/retain-release.m')
| -rw-r--r-- | test/Analysis/retain-release.m | 708 |
1 files changed, 708 insertions, 0 deletions
diff --git a/test/Analysis/retain-release.m b/test/Analysis/retain-release.m new file mode 100644 index 000000000000..3ff007ed8b3a --- /dev/null +++ b/test/Analysis/retain-release.m @@ -0,0 +1,708 @@ +//>>SLICER +// RUN: clang-cc -analyze -checker-cfref -verify %s && +// RUN: clang-cc -analyze -checker-cfref -analyzer-store=region -verify %s + +//===----------------------------------------------------------------------===// +// The following code is reduced using delta-debugging from Mac OS X headers: +// +// #include <Cocoa/Cocoa.h> +// #include <CoreFoundation/CoreFoundation.h> +// #include <DiskArbitration/DiskArbitration.h> +// #include <QuartzCore/QuartzCore.h> +// #include <Quartz/Quartz.h> +// +// It includes the basic definitions for the test cases below. +//===----------------------------------------------------------------------===// + +typedef unsigned int __darwin_natural_t; +typedef unsigned int UInt32; +typedef signed long CFIndex; +typedef const void * CFTypeRef; +typedef const struct __CFString * CFStringRef; +typedef const struct __CFAllocator * CFAllocatorRef; +extern CFTypeRef CFRetain(CFTypeRef cf); +extern void CFRelease(CFTypeRef cf); +extern const CFAllocatorRef kCFAllocatorDefault; +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 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); +CFAbsoluteTime CFDateGetAbsoluteTime(CFDateRef theDate); +enum { +kCFCalendarComponentsWrap = (1UL << 0) }; +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; +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 <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 @interface NSArray : NSObject <NSCopying, NSMutableCopying, NSCoding, NSFastEnumeration> - (NSUInteger)count; +@end @interface NSArray (NSArrayCreation) + (id)array; +@end @interface NSAutoreleasePool : NSObject { +} +- (void)drain; +@end typedef double NSTimeInterval; +@interface NSDate : NSObject <NSCopying, NSCoding> - (NSTimeInterval)timeIntervalSinceReferenceDate; +@end enum { +NSWrapCalendarComponents = kCFCalendarComponentsWrap, }; +@interface NSString : NSObject <NSCopying, NSMutableCopying, NSCoding> - (NSUInteger)length; +- ( const char *)UTF8String; +- (id)initWithUTF8String:(const char *)nullTerminatedCString; ++ (id)stringWithUTF8String:(const char *)nullTerminatedCString; +@end @interface NSData : NSObject <NSCopying, NSMutableCopying, NSCoding> - (NSUInteger)length; ++ (id)dataWithBytesNoCopy:(void *)bytes length:(NSUInteger)length; ++ (id)dataWithBytesNoCopy:(void *)bytes length:(NSUInteger)length freeWhenDone:(BOOL)b; +@end @interface NSDictionary : NSObject <NSCopying, NSMutableCopying, NSCoding, NSFastEnumeration> - (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; +struct CGRect { +}; +typedef struct CGRect CGRect; +- (id)init; +typedef mach_port_t io_object_t; +typedef io_object_t io_service_t; +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; +@end @class CIContext; +@class NSArray, NSError, NSEvent, NSMenu, NSUndoManager, NSWindow; +@interface NSResponder : NSObject <NSCoding> { +} +@end @protocol NSAnimatablePropertyContainer - (id)animator; +@end extern NSString *NSAnimationTriggerOrderIn ; +@interface NSView : NSResponder <NSAnimatablePropertyContainer> { +} +@end @class NSColor, NSFont, NSNotification; +@protocol NSValidatedUserInterfaceItem - (SEL)action; +@end @protocol NSUserInterfaceValidations - (BOOL)validateUserInterfaceItem:(id <NSValidatedUserInterfaceItem>)anItem; +@end typedef struct NSThreadPrivate _NSThreadPrivate; +@interface NSApplication : NSResponder <NSUserInterfaceValidations> { +} +@end enum { +NSTerminateCancel = 0, NSTerminateNow = 1, NSTerminateLater = 2 }; +typedef NSUInteger NSApplicationTerminateReply; +@protocol NSApplicationDelegate <NSObject> @optional - (NSApplicationTerminateReply)applicationShouldTerminate:(NSApplication *)sender; +@end enum { +NSUserInterfaceLayoutDirectionLeftToRight = 0, NSUserInterfaceLayoutDirectionRightToLeft = 1 }; +@interface CIImage : NSObject <NSCoding, NSCopying> { +} +typedef int CIFormat; +typedef struct __SFlags { +} +_SFlags; +@end extern NSString * const kCAGravityCenter __attribute__((visibility("default"))); +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; +@end @protocol QCCompositionRenderer @end @interface QCRenderer : NSObject <QCCompositionRenderer> { +} +- (id) createSnapshotImageOfType:(NSString*)type; +@end @interface QCView : NSView <QCCompositionRenderer> { +} +- (id) createSnapshotImageOfType:(NSString*)type; +@end +extern void NSLog(NSString *format, ...) __attribute__((format(__NSString__, 1, 2))); + +//===----------------------------------------------------------------------===// +// 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 +} + + +// 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 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 + +// <rdar://problem/6659160> +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 <rdar://problem/6704930>. 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]; + } +} + +//===----------------------------------------------------------------------===// +// <rdar://problem/6833332> +// One build of the analyzer accidentally stopped tracking the allocated +// object after the 'retain'. +//===----------------------------------------------------------------------===// + +@interface rdar_6833332 : NSObject <NSApplicationDelegate> { + 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 + +//===----------------------------------------------------------------------===// +// <rdar://problem/6257780> 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; +} + +//===----------------------------------------------------------------------===// +// <rdar://problem/6866843> 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]; +} + + +//===----------------------------------------------------------------------===// +// <rdar://problem/6877235> 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 + +//===----------------------------------------------------------------------===// +//<rdar://problem/6320065> 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; +} + +//===----------------------------------------------------------------------===// +// <rdar://problem/6859457> [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 + +//===----------------------------------------------------------------------===// +// <rdar://problem/6893565> 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 + +//===----------------------------------------------------------------------===// +// <rdar://problem/6902710> 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}} +} + +//===----------------------------------------------------------------------===// +// Tests of ownership attributes. +//===----------------------------------------------------------------------===// + +typedef NSString* MyStringTy; + +@interface TestOwnershipAttr : NSObject +- (NSString*) returnsAnOwnedString __attribute__((ns_returns_retained)); // no-warning +- (NSString*) returnsAnOwnedCFString __attribute__((cf_returns_retained)); // no-warning +- (MyStringTy) returnsAnOwnedTypedString __attribute__((ns_returns_retained)); // no-warning +- (int) returnsAnOwnedInt __attribute__((ns_returns_retained)); // expected-warning{{'ns_returns_retained' attribute only applies to functions or methods that return a pointer or Objective-C object}} +@end + +static int ownership_attribute_doesnt_go_here __attribute__((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}} +} +//<<SLICER + |