microsoft
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clang-1
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clang-1/test/Analysis/retain-release.m

1335 строки
53 KiB
Objective-C
Исходник Ответственный История

// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -analyze -analyzer-check-objc-mem -analyzer-store=basic -fblocks -verify %s
// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -analyze -analyzer-check-objc-mem -analyzer-store=region -fblocks -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
#if __has_feature(attribute_ns_returns_not_retained)
#define NS_RETURNS_NOT_RETAINED __attribute__((ns_returns_not_retained))
#endif
#if __has_feature(attribute_cf_returns_not_retained)
#define CF_RETURNS_NOT_RETAINED __attribute__((cf_returns_not_retained))
#endif
//===----------------------------------------------------------------------===//
// 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>
// #include <IOKit/IOKitLib.h>
//
// 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 struct {
CFIndex location;
CFIndex length;
} CFRange;
static __inline__ __attribute__((always_inline)) CFRange CFRangeMake(CFIndex loc, CFIndex len) {
CFRange range;
range.location = loc;
range.length = len;
return range;
}
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 struct {
}
CFDictionaryKeyCallBacks;
extern const CFDictionaryKeyCallBacks kCFTypeDictionaryKeyCallBacks;
typedef struct {
}
CFDictionaryValueCallBacks;
extern const CFDictionaryValueCallBacks kCFTypeDictionaryValueCallBacks;
typedef const struct __CFDictionary * CFDictionaryRef;
typedef struct __CFDictionary * CFMutableDictionaryRef;
extern CFMutableDictionaryRef CFDictionaryCreateMutable(CFAllocatorRef allocator, CFIndex capacity, const CFDictionaryKeyCallBacks *keyCallBacks, const CFDictionaryValueCallBacks *valueCallBacks);
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;
enum {
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 };
typedef CFIndex CFNumberType;
typedef const struct __CFNumber * CFNumberRef;
extern CFNumberRef CFNumberCreate(CFAllocatorRef allocator, CFNumberType theType, const void *valuePtr);
typedef const struct __CFAttributedString *CFAttributedStringRef;
typedef struct __CFAttributedString *CFMutableAttributedStringRef;
extern CFAttributedStringRef CFAttributedStringCreate(CFAllocatorRef alloc, CFStringRef str, CFDictionaryRef attributes) ;
extern CFMutableAttributedStringRef CFAttributedStringCreateMutableCopy(CFAllocatorRef alloc, CFIndex maxLength, CFAttributedStringRef aStr) ;
extern void CFAttributedStringSetAttribute(CFMutableAttributedStringRef aStr, CFRange range, CFStringRef attrName, CFTypeRef value) ;
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 <NSObject> {}
+ (id)allocWithZone:(NSZone *)zone;
+ (id)alloc;
- (void)dealloc;
@end
@interface NSObject (NSCoderMethods)
- (id)awakeAfterUsingCoder:(NSCoder *)aDecoder;
@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, NSDictionary;
@interface NSValue : NSObject <NSCopying, NSCoding> - (void)getValue:(void *)value;
@end @interface NSNumber : NSValue - (char)charValue;
- (id)initWithInt:(int)value;
@end @class NSString;
@interface NSArray : NSObject <NSCopying, NSMutableCopying, NSCoding, NSFastEnumeration> - (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 <NSCopying, NSCoding> - (NSTimeInterval)timeIntervalSinceReferenceDate;
@end typedef unsigned short unichar;
@interface NSString : NSObject <NSCopying, NSMutableCopying, NSCoding> - (NSUInteger)length;
- ( const char *)UTF8String;
- (id)initWithUTF8String:(const char *)nullTerminatedCString;
+ (id)stringWithUTF8String:(const char *)nullTerminatedCString;
@end @class NSString, NSURL, NSError;
@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 @class NSLocale, NSDate, NSCalendar, NSTimeZone, NSError, NSArray, NSMutableDictionary;
@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;
@end typedef double CGFloat;
struct CGSize {
};
typedef struct CGSize CGSize;
struct CGRect {
};
typedef struct CGRect CGRect;
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 );
@interface NSTask : NSObject - (id)init;
@end typedef struct CGColorSpace *CGColorSpaceRef;
typedef struct CGImage *CGImageRef;
typedef struct CGLayer *CGLayerRef;
@interface NSResponder : NSObject <NSCoding> {
}
@end @protocol NSAnimatablePropertyContainer - (id)animator;
@end extern NSString *NSAnimationTriggerOrderIn ;
@interface NSView : NSResponder <NSAnimatablePropertyContainer> {
}
@end @protocol NSValidatedUserInterfaceItem - (SEL)action;
@end @protocol NSUserInterfaceValidations - (BOOL)validateUserInterfaceItem:(id <NSValidatedUserInterfaceItem>)anItem;
@end @class NSDate, NSDictionary, NSError, NSException, NSNotification;
@interface NSApplication : NSResponder <NSUserInterfaceValidations> {
}
@end enum {
NSTerminateCancel = 0, NSTerminateNow = 1, NSTerminateLater = 2 };
typedef NSUInteger NSApplicationTerminateReply;
@protocol NSApplicationDelegate <NSObject> @optional - (NSApplicationTerminateReply)applicationShouldTerminate:(NSApplication *)sender;
@end @class NSAttributedString, NSEvent, NSFont, NSFormatter, NSImage, NSMenu, NSText, NSView, NSTextView;
@interface NSCell : NSObject <NSCopying, NSCoding> {
}
@end @class NSTextField, NSPanel, NSArray, NSWindow, NSImage, NSButton, NSError;
typedef struct {
}
CVTimeStamp;
@interface CIImage : NSObject <NSCoding, NSCopying> {
}
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 extern NSString* const QCRendererEventKey;
@protocol QCCompositionRenderer - (NSDictionary*) attributes;
@end @interface QCRenderer : NSObject <QCCompositionRenderer> {
}
- (id) createSnapshotImageOfType:(NSString*)type;
@end extern NSString* const QCViewDidStartRenderingNotification;
@interface QCView : NSView <QCCompositionRenderer> {
}
- (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 <NSObject> @required - (void)didRemoveDevice:(ICDevice*)device;
@end extern NSString *const ICScannerStatusWarmingUp;
@class ICScannerDevice;
@protocol ICScannerDeviceDelegate <ICDeviceDelegate> @optional - (void)scannerDeviceDidBecomeAvailable:(ICScannerDevice*)scanner;
@end
typedef long unsigned int __darwin_size_t;
typedef __darwin_size_t size_t;
typedef unsigned long CFTypeID;
struct CGPoint {
CGFloat x;
CGFloat y;
};
typedef struct CGPoint CGPoint;
typedef struct CGGradient *CGGradientRef;
typedef uint32_t CGGradientDrawingOptions;
extern CFTypeID CGGradientGetTypeID(void);
extern CGGradientRef CGGradientCreateWithColorComponents(CGColorSpaceRef
space, const CGFloat components[], const CGFloat locations[], size_t count);
extern CGGradientRef CGGradientCreateWithColors(CGColorSpaceRef space,
CFArrayRef colors, const CGFloat locations[]);
extern CGGradientRef CGGradientRetain(CGGradientRef gradient);
extern void CGGradientRelease(CGGradientRef gradient);
typedef struct CGContext *CGContextRef;
extern void CGContextDrawLinearGradient(CGContextRef context,
CGGradientRef gradient, CGPoint startPoint, CGPoint endPoint,
CGGradientDrawingOptions options);
extern CGColorSpaceRef CGColorSpaceCreateDeviceRGB(void);
//===----------------------------------------------------------------------===//
// 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
// <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 that 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/7129086> -awakeAfterUsingCoder: returns an owned object
// and claims the receiver
//===----------------------------------------------------------------------===//
@interface RDar7129086 : NSObject {} @end
@implementation RDar7129086
- (id)awakeAfterUsingCoder:(NSCoder *)aDecoder {
[self release]; // no-warning
return [NSString alloc]; // no-warning
}
@end
//===----------------------------------------------------------------------===//
// <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}}
}
//===----------------------------------------------------------------------===//
// <rdar://problem/6945561> -[CIContext createCGLayerWithSize:info:]
// misinterpreted by clang scan-build
//===----------------------------------------------------------------------===//
void rdar6945561(CIContext *context, CGSize size, CFDictionaryRef d) {
[context createCGLayerWithSize:size info:d]; // expected-warning{{leak}}
}
//===----------------------------------------------------------------------===//
// <rdar://problem/6961230> 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}}
}
//===----------------------------------------------------------------------===//
// Test of handling objects whose references "escape" to containers.
//===----------------------------------------------------------------------===//
void CFDictionaryAddValue();
// <rdar://problem/6539791>
void rdar_6539791(CFMutableDictionaryRef y, void* key, void* val_key) {
CFMutableDictionaryRef x = CFDictionaryCreateMutable(kCFAllocatorDefault, 1, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
CFDictionaryAddValue(y, key, x);
CFRelease(x); // the dictionary keeps a reference, so the object isn't deallocated yet
signed z = 1;
CFNumberRef value = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &z);
if (value) {
CFDictionaryAddValue(x, val_key, value); // no-warning
CFRelease(value);
CFDictionaryAddValue(y, val_key, value); // no-warning
}
}
// <rdar://problem/6560661>
// Same issue, except with "AppendValue" functions.
void rdar_6560661(CFMutableArrayRef x) {
signed z = 1;
CFNumberRef value = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &z);
// CFArrayAppendValue keeps a reference to value.
CFArrayAppendValue(x, value);
CFRelease(value);
CFRetain(value);
CFRelease(value); // no-warning
}
// <rdar://problem/7152619>
// Same issue, excwept with "CFAttributeStringSetAttribute".
void rdar_7152619(CFStringRef str) {
CFAttributedStringRef string = CFAttributedStringCreate(kCFAllocatorDefault, str, 0);
CFMutableAttributedStringRef attrString = CFAttributedStringCreateMutableCopy(kCFAllocatorDefault, 100, string);
CFRelease(string);
NSNumber *number = [[NSNumber alloc] initWithInt:5]; // expected-warning{{leak}}
CFAttributedStringSetAttribute(attrString, CFRangeMake(0, 1), str, number);
[number release];
[number retain];
CFRelease(attrString);
}
//===----------------------------------------------------------------------===//
// Test of handling CGGradientXXX functions.
//===----------------------------------------------------------------------===//
void rdar_7184450(CGContextRef myContext, CGFloat x, CGPoint myStartPoint,
CGPoint myEndPoint) {
size_t num_locations = 6;
CGFloat locations[6] = { 0.0, 0.265, 0.28, 0.31, 0.36, 1.0 };
CGFloat components[28] = { 239.0/256.0, 167.0/256.0, 170.0/256.0,
x, // Start color
207.0/255.0, 39.0/255.0, 39.0/255.0, x,
147.0/255.0, 21.0/255.0, 22.0/255.0, x,
175.0/255.0, 175.0/255.0, 175.0/255.0, x,
255.0/255.0,255.0/255.0, 255.0/255.0, x,
255.0/255.0,255.0/255.0, 255.0/255.0, x
}; // End color
CGGradientRef myGradient =
CGGradientCreateWithColorComponents(CGColorSpaceCreateDeviceRGB(), // expected-warning{{leak}}
components, locations, num_locations);
CGContextDrawLinearGradient(myContext, myGradient, myStartPoint, myEndPoint,
0);
CGGradientRelease(myGradient);
}
void rdar_7184450_pos(CGContextRef myContext, CGFloat x, CGPoint myStartPoint,
CGPoint myEndPoint) {
size_t num_locations = 6;
CGFloat locations[6] = { 0.0, 0.265, 0.28, 0.31, 0.36, 1.0 };
CGFloat components[28] = { 239.0/256.0, 167.0/256.0, 170.0/256.0,
x, // Start color
207.0/255.0, 39.0/255.0, 39.0/255.0, x,
147.0/255.0, 21.0/255.0, 22.0/255.0, x,
175.0/255.0, 175.0/255.0, 175.0/255.0, x,
255.0/255.0,255.0/255.0, 255.0/255.0, x,
255.0/255.0,255.0/255.0, 255.0/255.0, x
}; // End color
CGGradientRef myGradient =
CGGradientCreateWithColorComponents(CGColorSpaceCreateDeviceRGB(), components, locations, num_locations); // expected-warning 2 {{leak}}
CGContextDrawLinearGradient(myContext, myGradient, myStartPoint, myEndPoint,
0);
}
//===----------------------------------------------------------------------===//
// <rdar://problem/7299394> clang false positive: retained instance passed to
// thread in pthread_create marked as leak
//
// Until we have full IPA, the analyzer should stop tracking the reference
// count of objects passed to pthread_create.
//
//===----------------------------------------------------------------------===//
struct _opaque_pthread_t {};
struct _opaque_pthread_attr_t {};
typedef struct _opaque_pthread_t *__darwin_pthread_t;
typedef struct _opaque_pthread_attr_t __darwin_pthread_attr_t;
typedef __darwin_pthread_t pthread_t;
typedef __darwin_pthread_attr_t pthread_attr_t;
int pthread_create(pthread_t * restrict, const pthread_attr_t * restrict,
void *(*)(void *), void * restrict);
void *rdar_7299394_start_routine(void *p) {
[((id) p) release];
return 0;
}
void rdar_7299394(pthread_attr_t *attr, pthread_t *thread, void *args) {
NSNumber *number = [[NSNumber alloc] initWithInt:5]; // no-warning
pthread_create(thread, attr, rdar_7299394_start_routine, number);
}
void rdar_7299394_positive(pthread_attr_t *attr, pthread_t *thread) {
NSNumber *number = [[NSNumber alloc] initWithInt:5]; // expected-warning{{leak}}
}
//===----------------------------------------------------------------------===//
// <rdar://problem/7283567> False leak associated with call to
// CVPixelBufferCreateWithBytes ()
//
// According to the Core Video Reference (ADC), CVPixelBufferCreateWithBytes and
// CVPixelBufferCreateWithPlanarBytes can release (via a callback) the
// pixel buffer object. These test cases show how the analyzer stops tracking
// the reference count for the objects passed for this argument. This
// could be made smarter.
//===----------------------------------------------------------------------===//
typedef int int32_t;
typedef UInt32 FourCharCode;
typedef FourCharCode OSType;
typedef uint64_t CVOptionFlags;
typedef int32_t CVReturn;
typedef struct __CVBuffer *CVBufferRef;
typedef CVBufferRef CVImageBufferRef;
typedef CVImageBufferRef CVPixelBufferRef;
typedef void (*CVPixelBufferReleaseBytesCallback)( void *releaseRefCon, const void *baseAddress );
extern CVReturn CVPixelBufferCreateWithBytes(CFAllocatorRef allocator,
size_t width,
size_t height,
OSType pixelFormatType,
void *baseAddress,
size_t bytesPerRow,
CVPixelBufferReleaseBytesCallback releaseCallback,
void *releaseRefCon,
CFDictionaryRef pixelBufferAttributes,
CVPixelBufferRef *pixelBufferOut) ;
typedef void (*CVPixelBufferReleasePlanarBytesCallback)( void *releaseRefCon, const void *dataPtr, size_t dataSize, size_t numberOfPlanes, const void *planeAddresses[] );
extern CVReturn CVPixelBufferCreateWithPlanarBytes(CFAllocatorRef allocator,
size_t width,
size_t height,
OSType pixelFormatType,
void *dataPtr,
size_t dataSize,
size_t numberOfPlanes,
void *planeBaseAddress[],
size_t planeWidth[],
size_t planeHeight[],
size_t planeBytesPerRow[],
CVPixelBufferReleasePlanarBytesCallback releaseCallback,
void *releaseRefCon,
CFDictionaryRef pixelBufferAttributes,
CVPixelBufferRef *pixelBufferOut) ;
extern CVReturn CVPixelBufferCreateWithBytes(CFAllocatorRef allocator,
size_t width,
size_t height,
OSType pixelFormatType,
void *baseAddress,
size_t bytesPerRow,
CVPixelBufferReleaseBytesCallback releaseCallback,
void *releaseRefCon,
CFDictionaryRef pixelBufferAttributes,
CVPixelBufferRef *pixelBufferOut) ;
CVReturn rdar_7283567(CFAllocatorRef allocator, size_t width, size_t height,
OSType pixelFormatType, void *baseAddress,
size_t bytesPerRow,
CVPixelBufferReleaseBytesCallback releaseCallback,
CFDictionaryRef pixelBufferAttributes,
CVPixelBufferRef *pixelBufferOut) {
// For the allocated object, it doesn't really matter what type it is
// for the purpose of this test. All we want to show is that
// this is freed later by the callback.
NSNumber *number = [[NSNumber alloc] initWithInt:5]; // no-warning
return CVPixelBufferCreateWithBytes(allocator, width, height, pixelFormatType,
baseAddress, bytesPerRow, releaseCallback,
number, // potentially released by callback
pixelBufferAttributes, pixelBufferOut) ;
}
CVReturn rdar_7283567_2(CFAllocatorRef allocator, size_t width, size_t height,
OSType pixelFormatType, void *dataPtr, size_t dataSize,
size_t numberOfPlanes, void *planeBaseAddress[],
size_t planeWidth[], size_t planeHeight[], size_t planeBytesPerRow[],
CVPixelBufferReleasePlanarBytesCallback releaseCallback,
CFDictionaryRef pixelBufferAttributes,
CVPixelBufferRef *pixelBufferOut) {
// For the allocated object, it doesn't really matter what type it is
// for the purpose of this test. All we want to show is that
// this is freed later by the callback.
NSNumber *number = [[NSNumber alloc] initWithInt:5]; // no-warning
return CVPixelBufferCreateWithPlanarBytes(allocator,
width, height, pixelFormatType, dataPtr, dataSize,
numberOfPlanes, planeBaseAddress, planeWidth,
planeHeight, planeBytesPerRow, releaseCallback,
number, // potentially released by callback
pixelBufferAttributes, pixelBufferOut) ;
}
//===----------------------------------------------------------------------===//
// <rdar://problem/7358899> False leak associated with
// CGBitmapContextCreateWithData
//===----------------------------------------------------------------------===//
typedef uint32_t CGBitmapInfo;
typedef void (*CGBitmapContextReleaseDataCallback)(void *releaseInfo, void *data);
CGContextRef CGBitmapContextCreateWithData(void *data,
size_t width, size_t height, size_t bitsPerComponent,
size_t bytesPerRow, CGColorSpaceRef space, CGBitmapInfo bitmapInfo,
CGBitmapContextReleaseDataCallback releaseCallback, void *releaseInfo);
void rdar_7358899(void *data,
size_t width, size_t height, size_t bitsPerComponent,
size_t bytesPerRow, CGColorSpaceRef space, CGBitmapInfo bitmapInfo,
CGBitmapContextReleaseDataCallback releaseCallback) {
// For the allocated object, it doesn't really matter what type it is
// for the purpose of this test. All we want to show is that
// this is freed later by the callback.
NSNumber *number = [[NSNumber alloc] initWithInt:5]; // no-warning
CGBitmapContextCreateWithData(data, width, height, bitsPerComponent, // expected-warning{{leak}}
bytesPerRow, space, bitmapInfo, releaseCallback, number);
}
//===----------------------------------------------------------------------===//
// <rdar://problem/7265711> allow 'new', 'copy', 'alloc', 'init' prefix to
// start before '_' when determining Cocoa fundamental rule
//
// Previously the retain/release checker just skipped prefixes before the
// first '_' entirely. Now the checker honors the prefix if it results in a
// recognizable naming convention (e.g., 'new', 'init').
//===----------------------------------------------------------------------===//
@interface RDar7265711 {}
- (id) new_stuff;
@end
void rdar7265711_a(RDar7265711 *x) {
id y = [x new_stuff]; // expected-warning{{leak}}
}
void rdar7265711_b(RDar7265711 *x) {
id y = [x new_stuff]; // no-warning
[y release];
}
//===----------------------------------------------------------------------===//
// <rdar://problem/7306898> clang thinks [NSCursor dragCopyCursor] returns a
// retained reference
//===----------------------------------------------------------------------===//
@interface NSCursor : NSObject
+ (NSCursor *)dragCopyCursor;
@end
void rdar7306898(void) {
// 'dragCopyCursor' does not follow Cocoa's fundamental rule. It is a noun, not an sentence
// implying a 'copy' of something.
NSCursor *c = [NSCursor dragCopyCursor]; // no-warning
NSNumber *number = [[NSNumber alloc] initWithInt:5]; // expected-warning{{leak}}
}
//===----------------------------------------------------------------------===//
// <rdar://problem/7252064> sending 'release', 'retain', etc. to a Class
// directly is not likely what the user intended
//===----------------------------------------------------------------------===//
@interface RDar7252064 : NSObject @end
void rdar7252064(void) {
[RDar7252064 release]; // expected-warning{{The 'release' message should be sent to instances of class 'RDar7252064' and not the class directly}}
[RDar7252064 retain]; // expected-warning{{The 'retain' message should be sent to instances of class 'RDar7252064' and not the class directly}}
[RDar7252064 autorelease]; // expected-warning{{The 'autorelease' message should be sent to instances of class 'RDar7252064' and not the class directly}}
[NSAutoreleasePool drain]; // expected-warning{{method '+drain' not found}} expected-warning{{The 'drain' message should be sent to instances of class 'NSAutoreleasePool' and not the class directly}}
}
//===----------------------------------------------------------------------===//
// 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
- (NSString*) newString NS_RETURNS_NOT_RETAINED; // no-warning
- (NSString*) newStringNoAttr;
- (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}}
@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}}
}
void test_attr1c(TestOwnershipAttr *X) {
NSString *str = [X newString]; // no-warning
NSString *str2 = [X newStringNoAttr]; // expected-warning{{leak}}
}
@interface MyClassTestCFAttr : NSObject {}
- (NSDate*) returnsCFRetained CF_RETURNS_RETAINED;
- (CFDateRef) returnsCFRetainedAsCF CF_RETURNS_RETAINED;
- (CFDateRef) newCFRetainedAsCF CF_RETURNS_NOT_RETAINED;
- (CFDateRef) newCFRetainedAsCFNoAttr;
- (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.
}
- (CFDateRef) newCFRetainedAsCF {
return (CFDateRef)[(id)[self returnsCFRetainedAsCF] autorelease];
}
- (CFDateRef) newCFRetainedAsCFNoAttr {
return (CFDateRef)[(id)[self returnsCFRetainedAsCF] autorelease]; // expected-warning{{Object with +0 retain counts returned to caller where a +1 (owning) retain count is expected}}
}
- (NSDate*) alsoReturnsRetained {
return (NSDate*) returnsRetainedCFDate(); // expected-warning{{leak}}
}
- (CFDateRef) alsoReturnsRetainedAsCF {
return returnsRetainedCFDate(); // expected-warning{{leak}}
}
- (NSDate*) returnsNSRetained {
return (NSDate*) returnsRetainedCFDate(); // no-warning
}
@end
//===----------------------------------------------------------------------===//
// Test that leaks post-dominated by "panic" functions are not reported.
//
// <rdar://problem/5905851> do not report a leak when post-dominated by a call
// to a noreturn or panic function
//===----------------------------------------------------------------------===//
void panic() __attribute__((noreturn));
void panic_not_in_hardcoded_list() __attribute__((noreturn));
void test_panic_negative() {
signed z = 1;
CFNumberRef value = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &z); // expected-warning{{leak}}
}
void test_panic_positive() {
signed z = 1;
CFNumberRef value = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &z); // no-warning
panic();
}
void test_panic_neg_2(int x) {
signed z = 1;
CFNumberRef value = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &z); // expected-warning{{leak}}
if (x)
panic();
}
void test_panic_pos_2(int x) {
signed z = 1;
CFNumberRef value = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &z); // no-warning
if (x)
panic();
if (!x) {
// This showed up in <rdar://problem/7796563>, where we silently missed checking
// the function type for noreturn. "panic()" is a hard-coded known panic function
// that isn't always noreturn.
panic_not_in_hardcoded_list();
}
}
//===----------------------------------------------------------------------===//
// Test uses of blocks (closures)
//===----------------------------------------------------------------------===//
void test_blocks_1_pos(void) {
NSNumber *number = [[NSNumber alloc] initWithInt:5]; // expected-warning{{leak}}
^{}();
}
void test_blocks_1_indirect_release(void) {
NSNumber *number = [[NSNumber alloc] initWithInt:5]; // no-warning
^{ [number release]; }();
}
void test_blocks_1_indirect_retain(void) {
// Eventually this should be reported as a leak.
NSNumber *number = [[NSNumber alloc] initWithInt:5]; // no-warning
^{ [number retain]; }();
}
void test_blocks_1_indirect_release_via_call(void) {
NSNumber *number = [[NSNumber alloc] initWithInt:5]; // no-warning
^(NSObject *o){ [o release]; }(number);
}
void test_blocks_1_indirect_retain_via_call(void) {
// Eventually this should be reported as a leak.
NSNumber *number = [[NSNumber alloc] initWithInt:5]; // no-warning
^(NSObject *o){ [o retain]; }(number);
}
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