test/Analysis/retain-release.m

   1 // RUN: %clang_cc1 -triple x86_64-apple-darwin10 -analyze -analyzer-check-objc-mem -analyzer-store=basic -fblocks -verify %s
   2 // RUN: %clang_cc1 -triple x86_64-apple-darwin10 -analyze -analyzer-check-objc-mem -analyzer-store=region -fblocks -verify %s
   3
   4 #if __has_feature(attribute_ns_returns_retained)
   5 #define NS_RETURNS_RETAINED __attribute__((ns_returns_retained))
   6 #endif
   7 #if __has_feature(attribute_cf_returns_retained)
   8 #define CF_RETURNS_RETAINED __attribute__((cf_returns_retained))
   9 #endif
  10
  11 //===----------------------------------------------------------------------===//
  12 // The following code is reduced using delta-debugging from Mac OS X headers:
  13 //
  14 // #include <Cocoa/Cocoa.h>
  15 // #include <CoreFoundation/CoreFoundation.h>
  16 // #include <DiskArbitration/DiskArbitration.h>
  17 // #include <QuartzCore/QuartzCore.h>
  18 // #include <Quartz/Quartz.h>
  19 // #include <IOKit/IOKitLib.h>
  20 //
  21 // It includes the basic definitions for the test cases below.
  22 //===----------------------------------------------------------------------===//
  23
  24 typedef unsigned int __darwin_natural_t;
  25 typedef unsigned long uintptr_t;
  26 typedef unsigned int uint32_t;
  27 typedef unsigned long long uint64_t;
  28 typedef unsigned int UInt32;
  29 typedef signed long CFIndex;
  30 typedef struct {
  31     CFIndex location;
  32     CFIndex length;
  33 } CFRange;
  34 static __inline__ __attribute__((always_inline)) CFRange CFRangeMake(CFIndex loc, CFIndex len) {
  35     CFRange range;
  36     range.location = loc;
  37     range.length = len;
  38     return range;
  39 }
  40 typedef const void * CFTypeRef;
  41 typedef const struct __CFString * CFStringRef;
  42 typedef const struct __CFAllocator * CFAllocatorRef;
  43 extern const CFAllocatorRef kCFAllocatorDefault;
  44 extern CFTypeRef CFRetain(CFTypeRef cf);
  45 extern void CFRelease(CFTypeRef cf);
  46 typedef struct {
  47 }
  48 CFArrayCallBacks;
  49 extern const CFArrayCallBacks kCFTypeArrayCallBacks;
  50 typedef const struct __CFArray * CFArrayRef;
  51 typedef struct __CFArray * CFMutableArrayRef;
  52 extern CFMutableArrayRef CFArrayCreateMutable(CFAllocatorRef allocator, CFIndex capacity, const CFArrayCallBacks *callBacks);
  53 extern const void *CFArrayGetValueAtIndex(CFArrayRef theArray, CFIndex idx);
  54 extern void CFArrayAppendValue(CFMutableArrayRef theArray, const void *value);
  55 typedef struct {
  56 }
  57 CFDictionaryKeyCallBacks;
  58 extern const CFDictionaryKeyCallBacks kCFTypeDictionaryKeyCallBacks;
  59 typedef struct {
  60 }
  61 CFDictionaryValueCallBacks;
  62 extern const CFDictionaryValueCallBacks kCFTypeDictionaryValueCallBacks;
  63 typedef const struct __CFDictionary * CFDictionaryRef;
  64 typedef struct __CFDictionary * CFMutableDictionaryRef;
  65 extern CFMutableDictionaryRef CFDictionaryCreateMutable(CFAllocatorRef allocator, CFIndex capacity, const CFDictionaryKeyCallBacks *keyCallBacks, const CFDictionaryValueCallBacks *valueCallBacks);
  66 typedef UInt32 CFStringEncoding;
  67 enum {
  68 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  };
  69 extern CFStringRef CFStringCreateWithCString(CFAllocatorRef alloc, const char *cStr, CFStringEncoding encoding);
  70 typedef double CFTimeInterval;
  71 typedef CFTimeInterval CFAbsoluteTime;
  72 extern CFAbsoluteTime CFAbsoluteTimeGetCurrent(void);
  73 typedef const struct __CFDate * CFDateRef;
  74 extern CFDateRef CFDateCreate(CFAllocatorRef allocator, CFAbsoluteTime at);
  75 extern CFAbsoluteTime CFDateGetAbsoluteTime(CFDateRef theDate);
  76 typedef __darwin_natural_t natural_t;
  77 typedef natural_t mach_port_name_t;
  78 typedef mach_port_name_t mach_port_t;
  79 typedef int kern_return_t;
  80 typedef kern_return_t mach_error_t;
  81 enum {
  82 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    };
  83 typedef CFIndex CFNumberType;
  84 typedef const struct __CFNumber * CFNumberRef;
  85 extern CFNumberRef CFNumberCreate(CFAllocatorRef allocator, CFNumberType theType, const void *valuePtr);
  86 typedef const struct __CFAttributedString *CFAttributedStringRef;
  87 typedef struct __CFAttributedString *CFMutableAttributedStringRef;
  88 extern CFAttributedStringRef CFAttributedStringCreate(CFAllocatorRef alloc, CFStringRef str, CFDictionaryRef attributes) ;
  89 extern CFMutableAttributedStringRef CFAttributedStringCreateMutableCopy(CFAllocatorRef alloc, CFIndex maxLength, CFAttributedStringRef aStr) ;
  90 extern void CFAttributedStringSetAttribute(CFMutableAttributedStringRef aStr, CFRange range, CFStringRef attrName, CFTypeRef value) ;
  91 typedef signed char BOOL;
  92 typedef unsigned long NSUInteger;
  93 @class NSString, Protocol;
  94 extern void NSLog(NSString *format, ...) __attribute__((format(__NSString__, 1, 2)));
  95 typedef struct _NSZone NSZone;
  96 @class NSInvocation, NSMethodSignature, NSCoder, NSString, NSEnumerator;
  97 @protocol NSObject
  98 - (BOOL)isEqual:(id)object;
  99 - (id)retain;
 100 - (oneway void)release;
 101 - (id)autorelease;
 102 @end  @protocol NSCopying  - (id)copyWithZone:(NSZone *)zone;
 103 @end  @protocol NSMutableCopying  - (id)mutableCopyWithZone:(NSZone *)zone;
 104 @end  @protocol NSCoding  - (void)encodeWithCoder:(NSCoder *)aCoder;
 105 @end
 106 @interface NSObject <NSObject> {}
 107 + (id)allocWithZone:(NSZone *)zone;
 108 + (id)alloc;
 109 - (void)dealloc;
 110 @end
 111 @interface NSObject (NSCoderMethods)
 112 - (id)awakeAfterUsingCoder:(NSCoder *)aDecoder;
 113 @end
 114 extern id NSAllocateObject(Class aClass, NSUInteger extraBytes, NSZone *zone);
 115 typedef struct {
 116 }
 117 NSFastEnumerationState;
 118 @protocol NSFastEnumeration  - (NSUInteger)countByEnumeratingWithState:(NSFastEnumerationState *)state objects:(id *)stackbuf count:(NSUInteger)len;
 119 @end           @class NSString, NSDictionary;
 120 @interface NSValue : NSObject <NSCopying, NSCoding>  - (void)getValue:(void *)value;
 121 @end  @interface NSNumber : NSValue  - (char)charValue;
 122 - (id)initWithInt:(int)value;
 123 @end   @class NSString;
 124 @interface NSArray : NSObject <NSCopying, NSMutableCopying, NSCoding, NSFastEnumeration>  - (NSUInteger)count;
 125 @end  @interface NSArray (NSArrayCreation)  + (id)array;
 126 @end       @interface NSAutoreleasePool : NSObject {
 127 }
 128 - (void)drain;
 129 @end extern NSString * const NSBundleDidLoadNotification;
 130 typedef double NSTimeInterval;
 131 @interface NSDate : NSObject <NSCopying, NSCoding>  - (NSTimeInterval)timeIntervalSinceReferenceDate;
 132 @end            typedef unsigned short unichar;
 133 @interface NSString : NSObject <NSCopying, NSMutableCopying, NSCoding>    - (NSUInteger)length;
 134 - ( const char *)UTF8String;
 135 - (id)initWithUTF8String:(const char *)nullTerminatedCString;
 136 + (id)stringWithUTF8String:(const char *)nullTerminatedCString;
 137 @end        @class NSString, NSURL, NSError;
 138 @interface NSData : NSObject <NSCopying, NSMutableCopying, NSCoding>  - (NSUInteger)length;
 139 + (id)dataWithBytesNoCopy:(void *)bytes length:(NSUInteger)length;
 140 + (id)dataWithBytesNoCopy:(void *)bytes length:(NSUInteger)length freeWhenDone:(BOOL)b;
 141 @end   @class NSLocale, NSDate, NSCalendar, NSTimeZone, NSError, NSArray, NSMutableDictionary;
 142 @interface NSDictionary : NSObject <NSCopying, NSMutableCopying, NSCoding, NSFastEnumeration>  - (NSUInteger)count;
 143 @end    @interface NSMutableDictionary : NSDictionary  - (void)removeObjectForKey:(id)aKey;
 144 - (void)setObject:(id)anObject forKey:(id)aKey;
 145 @end  @interface NSMutableDictionary (NSMutableDictionaryCreation)  + (id)dictionaryWithCapacity:(NSUInteger)numItems;
 146 @end  typedef double CGFloat;
 147 struct CGSize {
 148 };
 149 typedef struct CGSize CGSize;
 150 struct CGRect {
 151 };
 152 typedef struct CGRect CGRect;
 153 typedef mach_port_t io_object_t;
 154 typedef char io_name_t[128];
 155 typedef io_object_t io_iterator_t;
 156 typedef io_object_t io_service_t;
 157 typedef struct IONotificationPort * IONotificationPortRef;
 158 typedef void (*IOServiceMatchingCallback)(  void * refcon,  io_iterator_t iterator );
 159 io_service_t IOServiceGetMatchingService(  mach_port_t masterPort,  CFDictionaryRef matching );
 160 kern_return_t IOServiceGetMatchingServices(  mach_port_t masterPort,  CFDictionaryRef matching,  io_iterator_t * existing );
 161 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));
 162 kern_return_t IOServiceAddMatchingNotification(  IONotificationPortRef notifyPort,  const io_name_t notificationType,  CFDictionaryRef matching,         IOServiceMatchingCallback callback,         void * refCon,  io_iterator_t * notification );
 163 CFMutableDictionaryRef IOServiceMatching(  const char * name );
 164 CFMutableDictionaryRef IOServiceNameMatching(  const char * name );
 165 CFMutableDictionaryRef IOBSDNameMatching(  mach_port_t masterPort,  uint32_t options,  const char * bsdName );
 166 CFMutableDictionaryRef IOOpenFirmwarePathMatching(  mach_port_t masterPort,  uint32_t options,  const char * path );
 167 CFMutableDictionaryRef IORegistryEntryIDMatching(  uint64_t entryID );
 168 typedef struct __DASession * DASessionRef;
 169 extern DASessionRef DASessionCreate( CFAllocatorRef allocator );
 170 typedef struct __DADisk * DADiskRef;
 171 extern DADiskRef DADiskCreateFromBSDName( CFAllocatorRef allocator, DASessionRef session, const char * name );
 172 extern DADiskRef DADiskCreateFromIOMedia( CFAllocatorRef allocator, DASessionRef session, io_service_t media );
 173 extern CFDictionaryRef DADiskCopyDescription( DADiskRef disk );
 174 extern DADiskRef DADiskCopyWholeDisk( DADiskRef disk );
 175 @interface NSTask : NSObject - (id)init;
 176 @end                    typedef struct CGColorSpace *CGColorSpaceRef;
 177 typedef struct CGImage *CGImageRef;
 178 typedef struct CGLayer *CGLayerRef;
 179 @interface NSResponder : NSObject <NSCoding> {
 180 }
 181 @end    @protocol NSAnimatablePropertyContainer      - (id)animator;
 182 @end  extern NSString *NSAnimationTriggerOrderIn ;
 183 @interface NSView : NSResponder  <NSAnimatablePropertyContainer>  {
 184 }
 185 @end @protocol NSValidatedUserInterfaceItem - (SEL)action;
 186 @end   @protocol NSUserInterfaceValidations - (BOOL)validateUserInterfaceItem:(id <NSValidatedUserInterfaceItem>)anItem;
 187 @end  @class NSDate, NSDictionary, NSError, NSException, NSNotification;
 188 @interface NSApplication : NSResponder <NSUserInterfaceValidations> {
 189 }
 190 @end   enum {
 191 NSTerminateCancel = 0,         NSTerminateNow = 1,         NSTerminateLater = 2 };
 192 typedef NSUInteger NSApplicationTerminateReply;
 193 @protocol NSApplicationDelegate <NSObject> @optional        - (NSApplicationTerminateReply)applicationShouldTerminate:(NSApplication *)sender;
 194 @end  @class NSAttributedString, NSEvent, NSFont, NSFormatter, NSImage, NSMenu, NSText, NSView, NSTextView;
 195 @interface NSCell : NSObject <NSCopying, NSCoding> {
 196 }
 197 @end @class NSTextField, NSPanel, NSArray, NSWindow, NSImage, NSButton, NSError;
 198 typedef struct {
 199 }
 200 CVTimeStamp;
 201 @interface CIImage : NSObject <NSCoding, NSCopying> {
 202 }
 203 typedef int CIFormat;
 204 @end  enum {
 205 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 };
 206 typedef mach_error_t DAReturn;
 207 typedef const struct __DADissenter * DADissenterRef;
 208 extern DADissenterRef DADissenterCreate( CFAllocatorRef allocator, DAReturn status, CFStringRef string );
 209 @interface CIContext: NSObject {
 210 }
 211 - (CGImageRef)createCGImage:(CIImage *)im fromRect:(CGRect)r;
 212 - (CGImageRef)createCGImage:(CIImage *)im fromRect:(CGRect)r     format:(CIFormat)f colorSpace:(CGColorSpaceRef)cs;
 213 - (CGLayerRef)createCGLayerWithSize:(CGSize)size info:(CFDictionaryRef)d;
 214 @end extern NSString* const QCRendererEventKey;
 215 @protocol QCCompositionRenderer - (NSDictionary*) attributes;
 216 @end   @interface QCRenderer : NSObject <QCCompositionRenderer> {
 217 }
 218 - (id) createSnapshotImageOfType:(NSString*)type;
 219 @end  extern NSString* const QCViewDidStartRenderingNotification;
 220 @interface QCView : NSView <QCCompositionRenderer> {
 221 }
 222 - (id) createSnapshotImageOfType:(NSString*)type;
 223 @end    enum {
 224 ICEXIFOrientation1 = 1,     ICEXIFOrientation2 = 2,     ICEXIFOrientation3 = 3,     ICEXIFOrientation4 = 4,     ICEXIFOrientation5 = 5,     ICEXIFOrientation6 = 6,     ICEXIFOrientation7 = 7,     ICEXIFOrientation8 = 8, };
 225 @class ICDevice;
 226 @protocol ICDeviceDelegate <NSObject>  @required      - (void)didRemoveDevice:(ICDevice*)device;
 227 @end extern NSString *const ICScannerStatusWarmingUp;
 228 @class ICScannerDevice;
 229 @protocol ICScannerDeviceDelegate <ICDeviceDelegate>  @optional       - (void)scannerDeviceDidBecomeAvailable:(ICScannerDevice*)scanner;
 230 @end
 231
 232 typedef long unsigned int __darwin_size_t;
 233 typedef __darwin_size_t size_t;
 234 typedef unsigned long CFTypeID;
 235 struct CGPoint {
 236   CGFloat x;
 237   CGFloat y;
 238 };
 239 typedef struct CGPoint CGPoint;
 240 typedef struct CGGradient *CGGradientRef;
 241 typedef uint32_t CGGradientDrawingOptions;
 242 extern CFTypeID CGGradientGetTypeID(void);
 243 extern CGGradientRef CGGradientCreateWithColorComponents(CGColorSpaceRef
 244   space, const CGFloat components[], const CGFloat locations[], size_t count);
 245 extern CGGradientRef CGGradientCreateWithColors(CGColorSpaceRef space,
 246   CFArrayRef colors, const CGFloat locations[]);
 247 extern CGGradientRef CGGradientRetain(CGGradientRef gradient);
 248 extern void CGGradientRelease(CGGradientRef gradient);
 249 typedef struct CGContext *CGContextRef;
 250 extern void CGContextDrawLinearGradient(CGContextRef context,
 251     CGGradientRef gradient, CGPoint startPoint, CGPoint endPoint,
 252     CGGradientDrawingOptions options);
 253 extern CGColorSpaceRef CGColorSpaceCreateDeviceRGB(void);
 254
 255 //===----------------------------------------------------------------------===//
 256 // Test cases.
 257 //===----------------------------------------------------------------------===//
 258
 259 CFAbsoluteTime f1() {
 260   CFAbsoluteTime t = CFAbsoluteTimeGetCurrent();
 261   CFDateRef date = CFDateCreate(0, t);
 262   CFRetain(date);
 263   CFRelease(date);
 264   CFDateGetAbsoluteTime(date); // no-warning
 265   CFRelease(date);
 266   t = CFDateGetAbsoluteTime(date);   // expected-warning{{Reference-counted object is used after it is released.}}
 267   return t;
 268 }
 269
 270 CFAbsoluteTime f2() {
 271   CFAbsoluteTime t = CFAbsoluteTimeGetCurrent();
 272   CFDateRef date = CFDateCreate(0, t);
 273   [((NSDate*) date) retain];
 274   CFRelease(date);
 275   CFDateGetAbsoluteTime(date); // no-warning
 276   [((NSDate*) date) release];
 277   t = CFDateGetAbsoluteTime(date);   // expected-warning{{Reference-counted object is used after it is released.}}
 278   return t;
 279 }
 280
 281
 282 NSDate* global_x;
 283
 284 // Test to see if we supresss an error when we store the pointer
 285 // to a global.
 286
 287 CFAbsoluteTime f3() {
 288   CFAbsoluteTime t = CFAbsoluteTimeGetCurrent();
 289   CFDateRef date = CFDateCreate(0, t);
 290   [((NSDate*) date) retain];
 291   CFRelease(date);
 292   CFDateGetAbsoluteTime(date); // no-warning
 293   global_x = (NSDate*) date;
 294   [((NSDate*) date) release];
 295   t = CFDateGetAbsoluteTime(date);   // no-warning
 296   return t;
 297 }
 298
 299 //---------------------------------------------------------------------------
 300 // Test case 'f4' differs for region store and basic store.  See
 301 // retain-release-region-store.m and retain-release-basic-store.m.
 302 //---------------------------------------------------------------------------
 303
 304 // Test a leak.
 305
 306 CFAbsoluteTime f5(int x) {
 307   CFAbsoluteTime t = CFAbsoluteTimeGetCurrent();
 308   CFDateRef date = CFDateCreate(0, t); // expected-warning{{leak}}
 309
 310   if (x)
 311     CFRelease(date);
 312
 313   return t;
 314 }
 315
 316 // Test a leak involving the return.
 317
 318 CFDateRef f6(int x) {
 319   CFDateRef date = CFDateCreate(0, CFAbsoluteTimeGetCurrent());  // expected-warning{{leak}}
 320   CFRetain(date);
 321   return date;
 322 }
 323
 324 // Test a leak involving an overwrite.
 325
 326 CFDateRef f7() {
 327   CFDateRef date = CFDateCreate(0, CFAbsoluteTimeGetCurrent());  //expected-warning{{leak}}
 328   CFRetain(date);
 329   date = CFDateCreate(0, CFAbsoluteTimeGetCurrent());
 330   return date;
 331 }
 332
 333 // Generalization of Create rule.  MyDateCreate returns a CFXXXTypeRef, and
 334 // has the word create.
 335 CFDateRef MyDateCreate();
 336
 337 CFDateRef f8() {
 338   CFDateRef date = MyDateCreate(); // expected-warning{{leak}}
 339   CFRetain(date);
 340   return date;
 341 }
 342
 343 CFDateRef f9() {
 344   CFDateRef date = CFDateCreate(0, CFAbsoluteTimeGetCurrent());
 345   int *p = 0;
 346   // When allocations fail, CFDateCreate can return null.
 347   if (!date) *p = 1; // expected-warning{{null}}
 348   return date;
 349 }
 350
 351 // Handle DiskArbitration API:
 352 //
 353 // http://developer.apple.com/DOCUMENTATION/DARWIN/Reference/DiscArbitrationFramework/
 354 //
 355 void f10(io_service_t media, DADiskRef d, CFStringRef s) {
 356   DADiskRef disk = DADiskCreateFromBSDName(kCFAllocatorDefault, 0, "hello"); // expected-warning{{leak}}
 357   if (disk) NSLog(@"ok");
 358
 359   disk = DADiskCreateFromIOMedia(kCFAllocatorDefault, 0, media); // expected-warning{{leak}}
 360   if (disk) NSLog(@"ok");
 361
 362   CFDictionaryRef dict = DADiskCopyDescription(d);  // expected-warning{{leak}}
 363   if (dict) NSLog(@"ok");
 364
 365   disk = DADiskCopyWholeDisk(d); // expected-warning{{leak}}
 366   if (disk) NSLog(@"ok");
 367
 368   DADissenterRef dissenter = DADissenterCreate(kCFAllocatorDefault,   // expected-warning{{leak}}
 369                                                 kDAReturnSuccess, s);
 370   if (dissenter) NSLog(@"ok");
 371
 372   DASessionRef session = DASessionCreate(kCFAllocatorDefault);  // expected-warning{{leak}}
 373   if (session) NSLog(@"ok");
 374 }
 375
 376 // Test retain/release checker with CFString and CFMutableArray.
 377 void f11() {
 378   // Create the array.
 379   CFMutableArrayRef A = CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks);
 380
 381   // Create a string.
 382   CFStringRef s1 = CFStringCreateWithCString(0, "hello world",
 383                                              kCFStringEncodingUTF8);
 384
 385   // Add the string to the array.
 386   CFArrayAppendValue(A, s1);
 387
 388   // Decrement the reference count.
 389   CFRelease(s1); // no-warning
 390
 391   // Get the string.  We don't own it.
 392   s1 = (CFStringRef) CFArrayGetValueAtIndex(A, 0);
 393
 394   // Release the array.
 395   CFRelease(A); // no-warning
 396
 397   // Release the string.  This is a bug.
 398   CFRelease(s1); // expected-warning{{Incorrect decrement of the reference count}}
 399 }
 400
 401 // PR 3337: Handle functions declared using typedefs.
 402 typedef CFTypeRef CREATEFUN();
 403 CREATEFUN MyCreateFun;
 404
 405 void f12() {
 406   CFTypeRef o = MyCreateFun(); // expected-warning {{leak}}
 407 }
 408
 409 void f13_autorelease() {
 410   CFMutableArrayRef A = CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks); // no-warning
 411   [(id) A autorelease]; // no-warning
 412 }
 413
 414 void f13_autorelease_b() {
 415   CFMutableArrayRef A = CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks);
 416   [(id) A autorelease];
 417   [(id) A autorelease]; // expected-warning{{Object sent -autorelease too many times}}
 418 }
 419
 420 CFMutableArrayRef f13_autorelease_c() {
 421   CFMutableArrayRef A = CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks);
 422   [(id) A autorelease];
 423   [(id) A autorelease];
 424   return A; // expected-warning{{Object sent -autorelease too many times}}
 425 }
 426
 427 CFMutableArrayRef f13_autorelease_d() {
 428   CFMutableArrayRef A = CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks);
 429   [(id) A autorelease];
 430   [(id) A autorelease];
 431   CFMutableArrayRef B = CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks); // expected-warning{{Object sent -autorelease too many times}}
 432   CFRelease(B); // no-warning
 433   while (1) {}
 434 }
 435
 436
 437 // This case exercises the logic where the leak site is the same as the allocation site.
 438 void f14_leakimmediately() {
 439   CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks); // expected-warning{{leak}}
 440 }
 441
 442 // Test that we track an allocated object beyond the point where the *name*
 443 // of the variable storing the reference is no longer live.
 444 void f15() {
 445   // Create the array.
 446   CFMutableArrayRef A = CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks);
 447   CFMutableArrayRef *B = &A;
 448   // At this point, the name 'A' is no longer live.
 449   CFRelease(*B);  // no-warning
 450 }
 451
 452 // Test when we pass NULL to CFRetain/CFRelease.
 453 void f16(int x, CFTypeRef p) {
 454   if (p)
 455     return;
 456
 457   if (x) {
 458     CFRelease(p); // expected-warning{{Null pointer argument in call to CFRelease}}
 459   }
 460   else {
 461     CFRetain(p); // expected-warning{{Null pointer argument in call to CFRetain}}
 462   }
 463 }
 464
 465 // Test basic tracking of ivars associated with 'self'.  For the retain/release
 466 // checker we currently do not want to flag leaks associated with stores
 467 // of tracked objects to ivars.
 468 @interface SelfIvarTest : NSObject {
 469   id myObj;
 470 }
 471 - (void)test_self_tracking;
 472 @end
 473
 474 @implementation SelfIvarTest
 475 - (void)test_self_tracking {
 476   myObj = (id) CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks); // no-warning
 477 }
 478 @end
 479
 480 // Test return of non-owned objects in contexts where an owned object
 481 // is expected.
 482 @interface TestReturnNotOwnedWhenExpectedOwned
 483 - (NSString*)newString;
 484 @end
 485
 486 @implementation TestReturnNotOwnedWhenExpectedOwned
 487 - (NSString*)newString {
 488   NSString *s = [NSString stringWithUTF8String:"hello"];
 489   return s; // expected-warning{{Object with +0 retain counts returned to caller where a +1 (owning) retain count is expected}}
 490 }
 491 @end
 492
 493 // <rdar://problem/6659160>
 494 int isFoo(char c);
 495
 496 static void rdar_6659160(char *inkind, char *inname)
 497 {
 498   // We currently expect that [NSObject alloc] cannot fail.  This
 499   // will be a toggled flag in the future.  It can indeed return null, but
 500   // Cocoa programmers generally aren't expected to reason about out-of-memory
 501   // conditions.
 502   NSString *kind = [[NSString alloc] initWithUTF8String:inkind];  // expected-warning{{leak}}
 503
 504   // We do allow stringWithUTF8String to fail.  This isn't really correct, as
 505   // far as returning 0.  In most error conditions it will throw an exception.
 506   // If allocation fails it could return 0, but again this
 507   // isn't expected.
 508   NSString *name = [NSString stringWithUTF8String:inname];
 509   if(!name)
 510     return;
 511
 512   const char *kindC = 0;
 513   const char *nameC = 0;
 514
 515   // In both cases, we cannot reach a point down below where we
 516   // dereference kindC or nameC with either being null.  This is because
 517   // we assume that [NSObject alloc] doesn't fail and that we have the guard
 518   // up above.
 519
 520   if(kind)
 521     kindC = [kind UTF8String];
 522   if(name)
 523     nameC = [name UTF8String];
 524   if(!isFoo(kindC[0])) // expected-warning{{null}}
 525     return;
 526   if(!isFoo(nameC[0])) // no-warning
 527     return;
 528
 529   [kind release];
 530   [name release]; // expected-warning{{Incorrect decrement of the reference count}}
 531 }
 532
 533 // PR 3677 - 'allocWithZone' should be treated as following the Cocoa naming
 534 //  conventions with respect to 'return'ing ownership.
 535 @interface PR3677: NSObject @end
 536 @implementation PR3677
 537 + (id)allocWithZone:(NSZone *)inZone {
 538   return [super allocWithZone:inZone];  // no-warning
 539 }
 540 @end
 541
 542 // PR 3820 - Reason about calls to -dealloc
 543 void pr3820_DeallocInsteadOfRelease(void)
 544 {
 545   id foo = [[NSString alloc] init]; // no-warning
 546   [foo dealloc];
 547   // foo is not leaked, since it has been deallocated.
 548 }
 549
 550 void pr3820_ReleaseAfterDealloc(void)
 551 {
 552   id foo = [[NSString alloc] init];
 553   [foo dealloc];
 554   [foo release];  // expected-warning{{used after it is release}}
 555   // NSInternalInconsistencyException: message sent to deallocated object
 556 }
 557
 558 void pr3820_DeallocAfterRelease(void)
 559 {
 560   NSLog(@"\n\n[%s]", __FUNCTION__);
 561   id foo = [[NSString alloc] init];
 562   [foo release];
 563   [foo dealloc]; // expected-warning{{used after it is released}}
 564   // message sent to released object
 565 }
 566
 567 // From <rdar://problem/6704930>.  The problem here is that 'length' binds to
 568 // '($0 - 1)' after '--length', but SimpleConstraintManager doesn't know how to
 569 // reason about '($0 - 1) > constant'.  As a temporary hack, we drop the value
 570 // of '($0 - 1)' and conjure a new symbol.
 571 void rdar6704930(unsigned char *s, unsigned int length) {
 572   NSString* name = 0;
 573   if (s != 0) {
 574     if (length > 0) {
 575       while (length > 0) {
 576         if (*s == ':') {
 577           ++s;
 578           --length;
 579           name = [[NSString alloc] init]; // no-warning
 580           break;
 581         }
 582         ++s;
 583         --length;
 584       }
 585       if ((length == 0) && (name != 0)) {
 586         [name release];
 587         name = 0;
 588       }
 589       if (length == 0) { // no ':' found -> use it all as name
 590         name = [[NSString alloc] init]; // no-warning
 591       }
 592     }
 593   }
 594
 595   if (name != 0) {
 596     [name release];
 597   }
 598 }
 599
 600 //===----------------------------------------------------------------------===//
 601 // <rdar://problem/6833332>
 602 // One build of the analyzer accidentally stopped tracking the allocated
 603 // object after the 'retain'.
 604 //===----------------------------------------------------------------------===//
 605
 606 @interface rdar_6833332 : NSObject <NSApplicationDelegate> {
 607     NSWindow *window;
 608 }
 609 @property (nonatomic, retain) NSWindow *window;
 610 @end
 611
 612 @implementation rdar_6833332
 613 @synthesize window;
 614 - (void)applicationDidFinishLaunching:(NSNotification *)aNotification {
 615  NSMutableDictionary *dict = [[NSMutableDictionary dictionaryWithCapacity:4] retain]; // expected-warning{{leak}}
 616
 617  [dict setObject:@"foo" forKey:@"bar"];
 618
 619  NSLog(@"%@", dict);
 620 }
 621 - (void)dealloc {
 622     [window release];
 623     [super dealloc];
 624 }
 625 @end
 626
 627 //===----------------------------------------------------------------------===//
 628 // <rdar://problem/6257780> clang checker fails to catch use-after-release
 629 //===----------------------------------------------------------------------===//
 630
 631 int rdar_6257780_Case1() {
 632   NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
 633   NSArray *array = [NSArray array];
 634   [array release]; // expected-warning{{Incorrect decrement of the reference count of an object that is not owned at this point by the caller}}
 635   [pool drain];
 636   return 0;
 637 }
 638
 639 //===----------------------------------------------------------------------===//
 640 // <rdar://problem/6866843> Checker should understand new/setObject:/release constructs
 641 //===----------------------------------------------------------------------===//
 642
 643 void rdar_6866843() {
 644  NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
 645  NSMutableDictionary* dictionary = [[NSMutableDictionary alloc] init];
 646  NSArray* array = [[NSArray alloc] init];
 647  [dictionary setObject:array forKey:@"key"];
 648  [array release];
 649  // Using 'array' here should be fine
 650  NSLog(@"array = %@\n", array); // no-warning
 651  // Now the array is released
 652  [dictionary release];
 653  [pool drain];
 654 }
 655
 656
 657 //===----------------------------------------------------------------------===//
 658 // <rdar://problem/6877235> Classes typedef-ed to CF objects should get the same treatment as CF objects
 659 //===----------------------------------------------------------------------===//
 660
 661 typedef CFTypeRef OtherRef;
 662
 663 @interface RDar6877235 : NSObject {}
 664 - (CFTypeRef)_copyCFTypeRef;
 665 - (OtherRef)_copyOtherRef;
 666 @end
 667
 668 @implementation RDar6877235
 669 - (CFTypeRef)_copyCFTypeRef {
 670   return [[NSString alloc] init]; // no-warning
 671 }
 672 - (OtherRef)_copyOtherRef {
 673   return [[NSString alloc] init]; // no-warning
 674 }
 675 @end
 676
 677 //===----------------------------------------------------------------------===//
 678 //<rdar://problem/6320065> false positive - init method returns an object
 679 // owned by caller
 680 //===----------------------------------------------------------------------===//
 681
 682 @interface RDar6320065 : NSObject {
 683   NSString *_foo;
 684 }
 685 - (id)initReturningNewClass;
 686 - (id)initReturningNewClassBad;
 687 - (id)initReturningNewClassBad2;
 688 @end
 689
 690 @interface RDar6320065Subclass : RDar6320065
 691 @end
 692
 693 @implementation RDar6320065
 694 - (id)initReturningNewClass {
 695   [self release];
 696   self = [[RDar6320065Subclass alloc] init]; // no-warning
 697   return self;
 698 }
 699 - (id)initReturningNewClassBad {
 700   [self release];
 701   [[RDar6320065Subclass alloc] init]; // expected-warning {{leak}}
 702   return self;
 703 }
 704 - (id)initReturningNewClassBad2 {
 705   [self release];
 706   self = [[RDar6320065Subclass alloc] init];
 707   return [self autorelease]; // expected-warning{{Object with +0 retain counts returned to caller where a +1 (owning) retain count is expected}}
 708 }
 709
 710 @end
 711
 712 @implementation RDar6320065Subclass
 713 @end
 714
 715 int RDar6320065_test() {
 716   RDar6320065 *test = [[RDar6320065 alloc] init]; // no-warning
 717   [test release];
 718   return 0;
 719 }
 720
 721 //===----------------------------------------------------------------------===//
 722 // <rdar://problem/7129086> -awakeAfterUsingCoder: returns an owned object
 723 //  and claims the receiver
 724 //===----------------------------------------------------------------------===//
 725
 726 @interface RDar7129086 : NSObject {} @end
 727 @implementation RDar7129086
 728 - (id)awakeAfterUsingCoder:(NSCoder *)aDecoder {
 729   [self release]; // no-warning
 730   return [NSString alloc];  // no-warning
 731 }
 732 @end
 733
 734 //===----------------------------------------------------------------------===//
 735 // <rdar://problem/6859457> [NSData dataWithBytesNoCopy] does not return a
 736 //  retained object
 737 //===----------------------------------------------------------------------===//
 738
 739 @interface RDar6859457 : NSObject {}
 740 - (NSString*) NoCopyString;
 741 - (NSString*) noCopyString;
 742 @end
 743
 744 @implementation RDar6859457
 745 - (NSString*) NoCopyString { return [[NSString alloc] init]; } // no-warning
 746 - (NSString*) noCopyString { return [[NSString alloc] init]; } // no-warning
 747 @end
 748
 749 void test_RDar6859457(RDar6859457 *x, void *bytes, NSUInteger dataLength) {
 750   [x NoCopyString]; // expected-warning{{leak}}
 751   [x noCopyString]; // expected-warning{{leak}}
 752   [NSData dataWithBytesNoCopy:bytes length:dataLength];  // no-warning
 753   [NSData dataWithBytesNoCopy:bytes length:dataLength freeWhenDone:1]; // no-warning
 754 }
 755
 756 //===----------------------------------------------------------------------===//
 757 // PR 4230 - an autorelease pool is not necessarily leaked during a premature
 758 //  return
 759 //===----------------------------------------------------------------------===//
 760
 761 static void PR4230(void)
 762 {
 763   NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; // no-warning
 764   NSString *object = [[[NSString alloc] init] autorelease]; // no-warning
 765   return;
 766 }
 767
 768 //===----------------------------------------------------------------------===//
 769 // Method name that has a null IdentifierInfo* for its first selector slot.
 770 // This test just makes sure that we handle it.
 771 //===----------------------------------------------------------------------===//
 772
 773 @interface TestNullIdentifier
 774 @end
 775
 776 @implementation TestNullIdentifier
 777 + (id):(int)x, ... {
 778   return [[NSString alloc] init]; // expected-warning{{leak}}
 779 }
 780 @end
 781
 782 //===----------------------------------------------------------------------===//
 783 // <rdar://problem/6893565> don't flag leaks for return types that cannot be
 784 //                          determined to be CF types
 785 //===----------------------------------------------------------------------===//
 786
 787 // We don't know if 'struct s6893565' represents a Core Foundation type, so
 788 // we shouldn't emit an error here.
 789 typedef struct s6893565* TD6893565;
 790
 791 @interface RDar6893565 {}
 792 -(TD6893565)newThing;
 793 @end
 794
 795 @implementation RDar6893565
 796 -(TD6893565)newThing {
 797   return (TD6893565) [[NSString alloc] init]; // no-warning
 798 }
 799 @end
 800
 801 //===----------------------------------------------------------------------===//
 802 // <rdar://problem/6902710> clang: false positives w/QC and CoreImage methods
 803 //===----------------------------------------------------------------------===//
 804
 805 void rdar6902710(QCView *view, QCRenderer *renderer, CIContext *context,
 806                  NSString *str, CIImage *img, CGRect rect,
 807                  CIFormat form, CGColorSpaceRef cs) {
 808   [view createSnapshotImageOfType:str]; // expected-warning{{leak}}
 809   [renderer createSnapshotImageOfType:str]; // expected-warning{{leak}}
 810   [context createCGImage:img fromRect:rect]; // expected-warning{{leak}}
 811   [context createCGImage:img fromRect:rect format:form colorSpace:cs]; // expected-warning{{leak}}
 812 }
 813
 814 //===----------------------------------------------------------------------===//
 815 // <rdar://problem/6945561> -[CIContext createCGLayerWithSize:info:]
 816 //                           misinterpreted by clang scan-build
 817 //===----------------------------------------------------------------------===//
 818
 819 void rdar6945561(CIContext *context, CGSize size, CFDictionaryRef d) {
 820   [context createCGLayerWithSize:size info:d]; // expected-warning{{leak}}
 821 }
 822
 823 //===----------------------------------------------------------------------===//
 824 // <rdar://problem/6961230> add knowledge of IOKit functions to retain/release
 825 //                          checker
 826 //===----------------------------------------------------------------------===//
 827
 828 void IOBSDNameMatching_wrapper(mach_port_t masterPort, uint32_t options,  const char * bsdName) {
 829   IOBSDNameMatching(masterPort, options, bsdName); // expected-warning{{leak}}
 830 }
 831
 832 void IOServiceMatching_wrapper(const char * name) {
 833   IOServiceMatching(name); // expected-warning{{leak}}
 834 }
 835
 836 void IOServiceNameMatching_wrapper(const char * name) {
 837   IOServiceNameMatching(name); // expected-warning{{leak}}
 838 }
 839
 840 CF_RETURNS_RETAINED CFDictionaryRef CreateDict();
 841
 842 void IOServiceAddNotification_wrapper(mach_port_t masterPort, const io_name_t notificationType,
 843   mach_port_t wakePort, uintptr_t reference, io_iterator_t * notification ) {
 844
 845   CFDictionaryRef matching = CreateDict();
 846   CFRelease(matching);
 847   IOServiceAddNotification(masterPort, notificationType, matching, // expected-warning{{used after it is released}} expected-warning{{deprecated}}
 848                            wakePort, reference, notification);
 849 }
 850
 851 void IORegistryEntryIDMatching_wrapper(uint64_t entryID ) {
 852   IORegistryEntryIDMatching(entryID); // expected-warning{{leak}}
 853 }
 854
 855 void IOOpenFirmwarePathMatching_wrapper(mach_port_t masterPort, uint32_t options,
 856                                         const char * path) {
 857   IOOpenFirmwarePathMatching(masterPort, options, path); // expected-warning{{leak}}
 858 }
 859
 860 void IOServiceGetMatchingService_wrapper(mach_port_t masterPort) {
 861   CFDictionaryRef matching = CreateDict();
 862   IOServiceGetMatchingService(masterPort, matching);
 863   CFRelease(matching); // expected-warning{{used after it is released}}
 864 }
 865
 866 void IOServiceGetMatchingServices_wrapper(mach_port_t masterPort, io_iterator_t *existing) {
 867   CFDictionaryRef matching = CreateDict();
 868   IOServiceGetMatchingServices(masterPort, matching, existing);
 869   CFRelease(matching); // expected-warning{{used after it is released}}
 870 }
 871
 872 void IOServiceAddMatchingNotification_wrapper(IONotificationPortRef notifyPort, const io_name_t notificationType,
 873   IOServiceMatchingCallback callback, void * refCon, io_iterator_t * notification) {
 874
 875   CFDictionaryRef matching = CreateDict();
 876   IOServiceAddMatchingNotification(notifyPort, notificationType, matching, callback, refCon, notification);
 877   CFRelease(matching); // expected-warning{{used after it is released}}
 878 }
 879
 880 //===----------------------------------------------------------------------===//
 881 // Test of handling objects whose references "escape" to containers.
 882 //===----------------------------------------------------------------------===//
 883
 884 void CFDictionaryAddValue();
 885
 886 // <rdar://problem/6539791>
 887 void rdar_6539791(CFMutableDictionaryRef y, void* key, void* val_key) {
 888   CFMutableDictionaryRef x = CFDictionaryCreateMutable(kCFAllocatorDefault, 1, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
 889   CFDictionaryAddValue(y, key, x);
 890   CFRelease(x); // the dictionary keeps a reference, so the object isn't deallocated yet
 891   signed z = 1;
 892   CFNumberRef value = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &z);
 893   if (value) {
 894     CFDictionaryAddValue(x, val_key, value); // no-warning
 895     CFRelease(value);
 896     CFDictionaryAddValue(y, val_key, value); // no-warning
 897   }
 898 }
 899
 900 // <rdar://problem/6560661>
 901 // Same issue, except with "AppendValue" functions.
 902 void rdar_6560661(CFMutableArrayRef x) {
 903   signed z = 1;
 904   CFNumberRef value = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &z);
 905   // CFArrayAppendValue keeps a reference to value.
 906   CFArrayAppendValue(x, value);
 907   CFRelease(value);
 908   CFRetain(value);
 909   CFRelease(value); // no-warning
 910 }
 911
 912 // <rdar://problem/7152619>
 913 // Same issue, excwept with "CFAttributeStringSetAttribute".
 914 void rdar_7152619(CFStringRef str) {
 915   CFAttributedStringRef string = CFAttributedStringCreate(kCFAllocatorDefault, str, 0);
 916   CFMutableAttributedStringRef attrString = CFAttributedStringCreateMutableCopy(kCFAllocatorDefault, 100, string);
 917   CFRelease(string);
 918   NSNumber *number = [[NSNumber alloc] initWithInt:5]; // expected-warning{{leak}}
 919   CFAttributedStringSetAttribute(attrString, CFRangeMake(0, 1), str, number);
 920   [number release];
 921   [number retain];
 922   CFRelease(attrString);
 923 }
 924
 925 //===----------------------------------------------------------------------===//
 926 // Test of handling CGGradientXXX functions.
 927 //===----------------------------------------------------------------------===//
 928
 929 void rdar_7184450(CGContextRef myContext, CGFloat x, CGPoint myStartPoint,
 930                   CGPoint myEndPoint) {
 931   size_t num_locations = 6;
 932   CGFloat locations[6] = { 0.0, 0.265, 0.28, 0.31, 0.36, 1.0 };
 933   CGFloat components[28] = { 239.0/256.0, 167.0/256.0, 170.0/256.0,
 934      x,  // Start color
 935     207.0/255.0, 39.0/255.0, 39.0/255.0, x,
 936     147.0/255.0, 21.0/255.0, 22.0/255.0, x,
 937     175.0/255.0, 175.0/255.0, 175.0/255.0, x,
 938     255.0/255.0,255.0/255.0, 255.0/255.0, x,
 939     255.0/255.0,255.0/255.0, 255.0/255.0, x
 940   }; // End color
 941
 942   CGGradientRef myGradient =
 943     CGGradientCreateWithColorComponents(CGColorSpaceCreateDeviceRGB(), // expected-warning{{leak}}
 944       components, locations, num_locations);
 945
 946   CGContextDrawLinearGradient(myContext, myGradient, myStartPoint, myEndPoint,
 947                               0);
 948   CGGradientRelease(myGradient);
 949 }
 950
 951 void rdar_7184450_pos(CGContextRef myContext, CGFloat x, CGPoint myStartPoint,
 952                   CGPoint myEndPoint) {
 953   size_t num_locations = 6;
 954   CGFloat locations[6] = { 0.0, 0.265, 0.28, 0.31, 0.36, 1.0 };
 955   CGFloat components[28] = { 239.0/256.0, 167.0/256.0, 170.0/256.0,
 956      x,  // Start color
 957     207.0/255.0, 39.0/255.0, 39.0/255.0, x,
 958     147.0/255.0, 21.0/255.0, 22.0/255.0, x,
 959     175.0/255.0, 175.0/255.0, 175.0/255.0, x,
 960     255.0/255.0,255.0/255.0, 255.0/255.0, x,
 961     255.0/255.0,255.0/255.0, 255.0/255.0, x
 962   }; // End color
 963
 964   CGGradientRef myGradient =
 965    CGGradientCreateWithColorComponents(CGColorSpaceCreateDeviceRGB(), components, locations, num_locations); // expected-warning 2 {{leak}}
 966
 967   CGContextDrawLinearGradient(myContext, myGradient, myStartPoint, myEndPoint,
 968                               0);
 969 }
 970
 971 //===----------------------------------------------------------------------===//
 972 // <rdar://problem/7299394> clang false positive: retained instance passed to
 973 //                          thread in pthread_create marked as leak
 974 //
 975 // Until we have full IPA, the analyzer should stop tracking the reference
 976 // count of objects passed to pthread_create.
 977 //
 978 //===----------------------------------------------------------------------===//
 979
 980 struct _opaque_pthread_t {};
 981 struct _opaque_pthread_attr_t {};
 982 typedef struct _opaque_pthread_t *__darwin_pthread_t;
 983 typedef struct _opaque_pthread_attr_t __darwin_pthread_attr_t;
 984 typedef __darwin_pthread_t pthread_t;
 985 typedef __darwin_pthread_attr_t pthread_attr_t;
 986
 987 int pthread_create(pthread_t * restrict, const pthread_attr_t * restrict,
 988                    void *(*)(void *), void * restrict);
 989
 990 void *rdar_7299394_start_routine(void *p) {
 991   [((id) p) release];
 992   return 0;
 993 }
 994 void rdar_7299394(pthread_attr_t *attr, pthread_t *thread, void *args) {
 995   NSNumber *number = [[NSNumber alloc] initWithInt:5]; // no-warning
 996   pthread_create(thread, attr, rdar_7299394_start_routine, number);
 997 }
 998 void rdar_7299394_positive(pthread_attr_t *attr, pthread_t *thread) {
 999   NSNumber *number = [[NSNumber alloc] initWithInt:5]; // expected-warning{{leak}}
1000 }
1001
1002 //===----------------------------------------------------------------------===//
1003 // <rdar://problem/7283567> False leak associated with call to
1004 //                          CVPixelBufferCreateWithBytes ()
1005 //
1006 // According to the Core Video Reference (ADC), CVPixelBufferCreateWithBytes and
1007 // CVPixelBufferCreateWithPlanarBytes can release (via a callback) the
1008 // pixel buffer object.  These test cases show how the analyzer stops tracking
1009 // the reference count for the objects passed for this argument.  This
1010 // could be made smarter.
1011 //===----------------------------------------------------------------------===//
1012
1013 typedef int int32_t;
1014 typedef UInt32 FourCharCode;
1015 typedef FourCharCode OSType;
1016 typedef uint64_t CVOptionFlags;
1017 typedef int32_t CVReturn;
1018 typedef struct __CVBuffer *CVBufferRef;
1019 typedef CVBufferRef CVImageBufferRef;
1020 typedef CVImageBufferRef CVPixelBufferRef;
1021 typedef void (*CVPixelBufferReleaseBytesCallback)( void *releaseRefCon, const void *baseAddress );
1022
1023 extern CVReturn CVPixelBufferCreateWithBytes(CFAllocatorRef allocator,
1024             size_t width,
1025             size_t height,
1026             OSType pixelFormatType,
1027             void *baseAddress,
1028             size_t bytesPerRow,
1029             CVPixelBufferReleaseBytesCallback releaseCallback,
1030             void *releaseRefCon,
1031             CFDictionaryRef pixelBufferAttributes,
1032                    CVPixelBufferRef *pixelBufferOut) ;
1033
1034 typedef void (*CVPixelBufferReleasePlanarBytesCallback)( void *releaseRefCon, const void *dataPtr, size_t dataSize, size_t numberOfPlanes, const void *planeAddresses[] );
1035
1036 extern CVReturn CVPixelBufferCreateWithPlanarBytes(CFAllocatorRef allocator,
1037         size_t width,
1038         size_t height,
1039         OSType pixelFormatType,
1040         void *dataPtr,
1041         size_t dataSize,
1042         size_t numberOfPlanes,
1043         void *planeBaseAddress[],
1044         size_t planeWidth[],
1045         size_t planeHeight[],
1046         size_t planeBytesPerRow[],
1047         CVPixelBufferReleasePlanarBytesCallback releaseCallback,
1048         void *releaseRefCon,
1049         CFDictionaryRef pixelBufferAttributes,
1050         CVPixelBufferRef *pixelBufferOut) ;
1051
1052 extern CVReturn CVPixelBufferCreateWithBytes(CFAllocatorRef allocator,
1053             size_t width,
1054             size_t height,
1055             OSType pixelFormatType,
1056             void *baseAddress,
1057             size_t bytesPerRow,
1058             CVPixelBufferReleaseBytesCallback releaseCallback,
1059             void *releaseRefCon,
1060             CFDictionaryRef pixelBufferAttributes,
1061                    CVPixelBufferRef *pixelBufferOut) ;
1062
1063 CVReturn rdar_7283567(CFAllocatorRef allocator, size_t width, size_t height,
1064                       OSType pixelFormatType, void *baseAddress,
1065                       size_t bytesPerRow,
1066                       CVPixelBufferReleaseBytesCallback releaseCallback,
1067                       CFDictionaryRef pixelBufferAttributes,
1068                       CVPixelBufferRef *pixelBufferOut) {
1069
1070   // For the allocated object, it doesn't really matter what type it is
1071   // for the purpose of this test.  All we want to show is that
1072   // this is freed later by the callback.
1073   NSNumber *number = [[NSNumber alloc] initWithInt:5]; // no-warning
1074
1075   return CVPixelBufferCreateWithBytes(allocator, width, height, pixelFormatType,
1076                                 baseAddress, bytesPerRow, releaseCallback,
1077                                 number, // potentially released by callback
1078                                 pixelBufferAttributes, pixelBufferOut) ;
1079 }
1080
1081 CVReturn rdar_7283567_2(CFAllocatorRef allocator, size_t width, size_t height,
1082         OSType pixelFormatType, void *dataPtr, size_t dataSize,
1083         size_t numberOfPlanes, void *planeBaseAddress[],
1084         size_t planeWidth[], size_t planeHeight[], size_t planeBytesPerRow[],
1085         CVPixelBufferReleasePlanarBytesCallback releaseCallback,
1086         CFDictionaryRef pixelBufferAttributes,
1087         CVPixelBufferRef *pixelBufferOut) {
1088
1089     // For the allocated object, it doesn't really matter what type it is
1090     // for the purpose of this test.  All we want to show is that
1091     // this is freed later by the callback.
1092     NSNumber *number = [[NSNumber alloc] initWithInt:5]; // no-warning
1093
1094     return CVPixelBufferCreateWithPlanarBytes(allocator,
1095               width, height, pixelFormatType, dataPtr, dataSize,
1096               numberOfPlanes, planeBaseAddress, planeWidth,
1097               planeHeight, planeBytesPerRow, releaseCallback,
1098               number, // potentially released by callback
1099               pixelBufferAttributes, pixelBufferOut) ;
1100 }
1101
1102 //===----------------------------------------------------------------------===//
1103 // <rdar://problem/7358899> False leak associated with
1104 //  CGBitmapContextCreateWithData
1105 //===----------------------------------------------------------------------===//
1106 typedef uint32_t CGBitmapInfo;
1107 typedef void (*CGBitmapContextReleaseDataCallback)(void *releaseInfo, void *data);
1108
1109 CGContextRef CGBitmapContextCreateWithData(void *data,
1110     size_t width, size_t height, size_t bitsPerComponent,
1111     size_t bytesPerRow, CGColorSpaceRef space, CGBitmapInfo bitmapInfo,
1112     CGBitmapContextReleaseDataCallback releaseCallback, void *releaseInfo);
1113
1114 void rdar_7358899(void *data,
1115       size_t width, size_t height, size_t bitsPerComponent,
1116       size_t bytesPerRow, CGColorSpaceRef space, CGBitmapInfo bitmapInfo,
1117       CGBitmapContextReleaseDataCallback releaseCallback) {
1118
1119     // For the allocated object, it doesn't really matter what type it is
1120     // for the purpose of this test.  All we want to show is that
1121     // this is freed later by the callback.
1122     NSNumber *number = [[NSNumber alloc] initWithInt:5]; // no-warning
1123
1124   CGBitmapContextCreateWithData(data, width, height, bitsPerComponent, // expected-warning{{leak}}
1125     bytesPerRow, space, bitmapInfo, releaseCallback, number);
1126 }
1127
1128 //===----------------------------------------------------------------------===//
1129 // <rdar://problem/7265711> allow 'new', 'copy', 'alloc', 'init' prefix to
1130 //  start before '_' when determining Cocoa fundamental rule
1131 //
1132 // Previously the retain/release checker just skipped prefixes before the
1133 // first '_' entirely.  Now the checker honors the prefix if it results in a
1134 // recognizable naming convention (e.g., 'new', 'init').
1135 //===----------------------------------------------------------------------===//
1136
1137 @interface RDar7265711 {}
1138 - (id) new_stuff;
1139 @end
1140
1141 void rdar7265711_a(RDar7265711 *x) {
1142   id y = [x new_stuff]; // expected-warning{{leak}}
1143 }
1144
1145 void rdar7265711_b(RDar7265711 *x) {
1146   id y = [x new_stuff]; // no-warning
1147   [y release];
1148 }
1149
1150 //===----------------------------------------------------------------------===//
1151 // <rdar://problem/7306898> clang thinks [NSCursor dragCopyCursor] returns a
1152 //                          retained reference
1153 //===----------------------------------------------------------------------===//
1154
1155 @interface NSCursor : NSObject
1156 + (NSCursor *)dragCopyCursor;
1157 @end
1158
1159 void rdar7306898(void) {
1160   // 'dragCopyCursor' does not follow Cocoa's fundamental rule.  It is a noun, not an sentence
1161   // implying a 'copy' of something.
1162   NSCursor *c =  [NSCursor dragCopyCursor]; // no-warning
1163   NSNumber *number = [[NSNumber alloc] initWithInt:5]; // expected-warning{{leak}}
1164 }
1165
1166 //===----------------------------------------------------------------------===//
1167 // <rdar://problem/7252064> sending 'release', 'retain', etc. to a Class
1168 // directly is not likely what the user intended
1169 //===----------------------------------------------------------------------===//
1170
1171 @interface RDar7252064 : NSObject @end
1172 void rdar7252064(void) {
1173   [RDar7252064 release]; // expected-warning{{The 'release' message should be sent to instances of class 'RDar7252064' and not the class directly}}
1174   [RDar7252064 retain]; // expected-warning{{The 'retain' message should be sent to instances of class 'RDar7252064' and not the class directly}}
1175   [RDar7252064 autorelease]; // expected-warning{{The 'autorelease' message should be sent to instances of class 'RDar7252064' and not the class directly}}
1176   [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}}
1177 }
1178
1179 //===----------------------------------------------------------------------===//
1180 // Tests of ownership attributes.
1181 //===----------------------------------------------------------------------===//
1182
1183 typedef NSString* MyStringTy;
1184
1185 @protocol FooP;
1186
1187 @interface TestOwnershipAttr : NSObject
1188 - (NSString*) returnsAnOwnedString  NS_RETURNS_RETAINED; // no-warning
1189 - (NSString*) returnsAnOwnedCFString  CF_RETURNS_RETAINED; // no-warning
1190 - (MyStringTy) returnsAnOwnedTypedString NS_RETURNS_RETAINED; // no-warning
1191 - (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}}
1192 @end
1193
1194 static int ownership_attribute_doesnt_go_here NS_RETURNS_RETAINED; // expected-warning{{'ns_returns_retained' attribute only applies to function or method types}}
1195
1196 void test_attr_1(TestOwnershipAttr *X) {
1197   NSString *str = [X returnsAnOwnedString]; // expected-warning{{leak}}
1198 }
1199
1200 void test_attr_1b(TestOwnershipAttr *X) {
1201   NSString *str = [X returnsAnOwnedCFString]; // expected-warning{{leak}}
1202 }
1203
1204 @interface MyClassTestCFAttr : NSObject {}
1205 - (NSDate*) returnsCFRetained CF_RETURNS_RETAINED;
1206 - (CFDateRef) returnsCFRetainedAsCF CF_RETURNS_RETAINED;
1207 - (NSDate*) alsoReturnsRetained;
1208 - (CFDateRef) alsoReturnsRetainedAsCF;
1209 - (NSDate*) returnsNSRetained NS_RETURNS_RETAINED;
1210 @end
1211
1212 CF_RETURNS_RETAINED
1213 CFDateRef returnsRetainedCFDate()  {
1214   return CFDateCreate(0, CFAbsoluteTimeGetCurrent());
1215 }
1216
1217 @implementation MyClassTestCFAttr
1218 - (NSDate*) returnsCFRetained {
1219   return (NSDate*) returnsRetainedCFDate(); // No leak.
1220 }
1221
1222 - (CFDateRef) returnsCFRetainedAsCF {
1223   return returnsRetainedCFDate(); // No leak.
1224 }
1225
1226
1227 - (NSDate*) alsoReturnsRetained {
1228   return (NSDate*) returnsRetainedCFDate(); // expected-warning{{leak}}
1229 }
1230
1231 - (CFDateRef) alsoReturnsRetainedAsCF {
1232   return returnsRetainedCFDate(); // expected-warning{{leak}}
1233 }
1234
1235
1236 - (NSDate*) returnsNSRetained {
1237   return (NSDate*) returnsRetainedCFDate(); // no-warning
1238 }
1239 @end
1240
1241 //===----------------------------------------------------------------------===//
1242 // Test that leaks post-dominated by "panic" functions are not reported.
1243 //
1244 // <rdar://problem/5905851> do not report a leak when post-dominated by a call
1245 // to a noreturn or panic function
1246 //===----------------------------------------------------------------------===//
1247
1248 void panic() __attribute__((noreturn));
1249
1250 void test_panic_negative() {
1251   signed z = 1;
1252   CFNumberRef value = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &z);  // expected-warning{{leak}}
1253 }
1254
1255 void test_panic_positive() {
1256   signed z = 1;
1257   CFNumberRef value = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &z); // no-warning
1258   panic();
1259 }
1260
1261 void test_panic_neg_2(int x) {
1262   signed z = 1;
1263   CFNumberRef value = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &z); // expected-warning{{leak}}
1264   if (x)
1265     panic();
1266 }
1267
1268 void test_panic_pos_2(int x) {
1269   signed z = 1;
1270   CFNumberRef value = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &z); // no-warning
1271   if (x)
1272     panic();
1273   if (!x)
1274     panic();
1275 }
1276
1277 //===----------------------------------------------------------------------===//
1278 // Test uses of blocks (closures)
1279 //===----------------------------------------------------------------------===//
1280
1281 void test_blocks_1_pos(void) {
1282   NSNumber *number = [[NSNumber alloc] initWithInt:5]; // expected-warning{{leak}}
1283   ^{}();
1284 }
1285
1286 void test_blocks_1_indirect_release(void) {
1287   NSNumber *number = [[NSNumber alloc] initWithInt:5]; // no-warning
1288   ^{ [number release]; }();
1289 }
1290
1291 void test_blocks_1_indirect_retain(void) {
1292   // Eventually this should be reported as a leak.
1293   NSNumber *number = [[NSNumber alloc] initWithInt:5]; // no-warning
1294   ^{ [number retain]; }();
1295 }
1296
1297 void test_blocks_1_indirect_release_via_call(void) {
1298   NSNumber *number = [[NSNumber alloc] initWithInt:5]; // no-warning
1299   ^(NSObject *o){ [o release]; }(number);
1300 }
1301
1302 void test_blocks_1_indirect_retain_via_call(void) {
1303   // Eventually this should be reported as a leak.
1304   NSNumber *number = [[NSNumber alloc] initWithInt:5]; // no-warning
1305   ^(NSObject *o){ [o retain]; }(number);
1306 }
1307