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 #if __has_feature(attribute_ns_returns_not_retained)
  11 #define NS_RETURNS_NOT_RETAINED __attribute__((ns_returns_not_retained))
  12 #endif
  13 #if __has_feature(attribute_cf_returns_not_retained)
  14 #define CF_RETURNS_NOT_RETAINED __attribute__((cf_returns_not_retained))
  15 #endif
  16
  17 //===----------------------------------------------------------------------===//
  18 // The following code is reduced using delta-debugging from Mac OS X headers:
  19 //
  20 // #include <Cocoa/Cocoa.h>
  21 // #include <CoreFoundation/CoreFoundation.h>
  22 // #include <DiskArbitration/DiskArbitration.h>
  23 // #include <QuartzCore/QuartzCore.h>
  24 // #include <Quartz/Quartz.h>
  25 // #include <IOKit/IOKitLib.h>
  26 //
  27 // It includes the basic definitions for the test cases below.
  28 //===----------------------------------------------------------------------===//
  29
  30 typedef unsigned int __darwin_natural_t;
  31 typedef unsigned long uintptr_t;
  32 typedef unsigned int uint32_t;
  33 typedef unsigned long long uint64_t;
  34 typedef unsigned int UInt32;
  35 typedef signed long CFIndex;
  36 typedef struct {
  37     CFIndex location;
  38     CFIndex length;
  39 } CFRange;
  40 static __inline__ __attribute__((always_inline)) CFRange CFRangeMake(CFIndex loc, CFIndex len) {
  41     CFRange range;
  42     range.location = loc;
  43     range.length = len;
  44     return range;
  45 }
  46 typedef const void * CFTypeRef;
  47 typedef const struct __CFString * CFStringRef;
  48 typedef const struct __CFAllocator * CFAllocatorRef;
  49 extern const CFAllocatorRef kCFAllocatorDefault;
  50 extern CFTypeRef CFRetain(CFTypeRef cf);
  51 extern void CFRelease(CFTypeRef cf);
  52 typedef struct {
  53 }
  54 CFArrayCallBacks;
  55 extern const CFArrayCallBacks kCFTypeArrayCallBacks;
  56 typedef const struct __CFArray * CFArrayRef;
  57 typedef struct __CFArray * CFMutableArrayRef;
  58 extern CFMutableArrayRef CFArrayCreateMutable(CFAllocatorRef allocator, CFIndex capacity, const CFArrayCallBacks *callBacks);
  59 extern const void *CFArrayGetValueAtIndex(CFArrayRef theArray, CFIndex idx);
  60 extern void CFArrayAppendValue(CFMutableArrayRef theArray, const void *value);
  61 typedef struct {
  62 }
  63 CFDictionaryKeyCallBacks;
  64 extern const CFDictionaryKeyCallBacks kCFTypeDictionaryKeyCallBacks;
  65 typedef struct {
  66 }
  67 CFDictionaryValueCallBacks;
  68 extern const CFDictionaryValueCallBacks kCFTypeDictionaryValueCallBacks;
  69 typedef const struct __CFDictionary * CFDictionaryRef;
  70 typedef struct __CFDictionary * CFMutableDictionaryRef;
  71 extern CFMutableDictionaryRef CFDictionaryCreateMutable(CFAllocatorRef allocator, CFIndex capacity, const CFDictionaryKeyCallBacks *keyCallBacks, const CFDictionaryValueCallBacks *valueCallBacks);
  72 typedef UInt32 CFStringEncoding;
  73 enum {
  74 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  };
  75 extern CFStringRef CFStringCreateWithCString(CFAllocatorRef alloc, const char *cStr, CFStringEncoding encoding);
  76 typedef double CFTimeInterval;
  77 typedef CFTimeInterval CFAbsoluteTime;
  78 extern CFAbsoluteTime CFAbsoluteTimeGetCurrent(void);
  79 typedef const struct __CFDate * CFDateRef;
  80 extern CFDateRef CFDateCreate(CFAllocatorRef allocator, CFAbsoluteTime at);
  81 extern CFAbsoluteTime CFDateGetAbsoluteTime(CFDateRef theDate);
  82 typedef __darwin_natural_t natural_t;
  83 typedef natural_t mach_port_name_t;
  84 typedef mach_port_name_t mach_port_t;
  85 typedef int kern_return_t;
  86 typedef kern_return_t mach_error_t;
  87 enum {
  88 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    };
  89 typedef CFIndex CFNumberType;
  90 typedef const struct __CFNumber * CFNumberRef;
  91 extern CFNumberRef CFNumberCreate(CFAllocatorRef allocator, CFNumberType theType, const void *valuePtr);
  92 typedef const struct __CFAttributedString *CFAttributedStringRef;
  93 typedef struct __CFAttributedString *CFMutableAttributedStringRef;
  94 extern CFAttributedStringRef CFAttributedStringCreate(CFAllocatorRef alloc, CFStringRef str, CFDictionaryRef attributes) ;
  95 extern CFMutableAttributedStringRef CFAttributedStringCreateMutableCopy(CFAllocatorRef alloc, CFIndex maxLength, CFAttributedStringRef aStr) ;
  96 extern void CFAttributedStringSetAttribute(CFMutableAttributedStringRef aStr, CFRange range, CFStringRef attrName, CFTypeRef value) ;
  97 typedef signed char BOOL;
  98 typedef unsigned long NSUInteger;
  99 @class NSString, Protocol;
 100 extern void NSLog(NSString *format, ...) __attribute__((format(__NSString__, 1, 2)));
 101 typedef struct _NSZone NSZone;
 102 @class NSInvocation, NSMethodSignature, NSCoder, NSString, NSEnumerator;
 103 @protocol NSObject
 104 - (BOOL)isEqual:(id)object;
 105 - (id)retain;
 106 - (oneway void)release;
 107 - (id)autorelease;
 108 @end  @protocol NSCopying  - (id)copyWithZone:(NSZone *)zone;
 109 @end  @protocol NSMutableCopying  - (id)mutableCopyWithZone:(NSZone *)zone;
 110 @end  @protocol NSCoding  - (void)encodeWithCoder:(NSCoder *)aCoder;
 111 @end
 112 @interface NSObject <NSObject> {}
 113 + (id)allocWithZone:(NSZone *)zone;
 114 + (id)alloc;
 115 - (void)dealloc;
 116 @end
 117 @interface NSObject (NSCoderMethods)
 118 - (id)awakeAfterUsingCoder:(NSCoder *)aDecoder;
 119 @end
 120 extern id NSAllocateObject(Class aClass, NSUInteger extraBytes, NSZone *zone);
 121 typedef struct {
 122 }
 123 NSFastEnumerationState;
 124 @protocol NSFastEnumeration  - (NSUInteger)countByEnumeratingWithState:(NSFastEnumerationState *)state objects:(id *)stackbuf count:(NSUInteger)len;
 125 @end           @class NSString, NSDictionary;
 126 @interface NSValue : NSObject <NSCopying, NSCoding>  - (void)getValue:(void *)value;
 127 @end  @interface NSNumber : NSValue  - (char)charValue;
 128 - (id)initWithInt:(int)value;
 129 @end   @class NSString;
 130 @interface NSArray : NSObject <NSCopying, NSMutableCopying, NSCoding, NSFastEnumeration>  - (NSUInteger)count;
 131 @end  @interface NSArray (NSArrayCreation)  + (id)array;
 132 @end       @interface NSAutoreleasePool : NSObject {
 133 }
 134 - (void)drain;
 135 @end extern NSString * const NSBundleDidLoadNotification;
 136 typedef double NSTimeInterval;
 137 @interface NSDate : NSObject <NSCopying, NSCoding>  - (NSTimeInterval)timeIntervalSinceReferenceDate;
 138 @end            typedef unsigned short unichar;
 139 @interface NSString : NSObject <NSCopying, NSMutableCopying, NSCoding>    - (NSUInteger)length;
 140 - ( const char *)UTF8String;
 141 - (id)initWithUTF8String:(const char *)nullTerminatedCString;
 142 + (id)stringWithUTF8String:(const char *)nullTerminatedCString;
 143 @end        @class NSString, NSURL, NSError;
 144 @interface NSData : NSObject <NSCopying, NSMutableCopying, NSCoding>  - (NSUInteger)length;
 145 + (id)dataWithBytesNoCopy:(void *)bytes length:(NSUInteger)length;
 146 + (id)dataWithBytesNoCopy:(void *)bytes length:(NSUInteger)length freeWhenDone:(BOOL)b;
 147 @end   @class NSLocale, NSDate, NSCalendar, NSTimeZone, NSError, NSArray, NSMutableDictionary;
 148 @interface NSDictionary : NSObject <NSCopying, NSMutableCopying, NSCoding, NSFastEnumeration>  - (NSUInteger)count;
 149 @end    @interface NSMutableDictionary : NSDictionary  - (void)removeObjectForKey:(id)aKey;
 150 - (void)setObject:(id)anObject forKey:(id)aKey;
 151 @end  @interface NSMutableDictionary (NSMutableDictionaryCreation)  + (id)dictionaryWithCapacity:(NSUInteger)numItems;
 152 @end  typedef double CGFloat;
 153 struct CGSize {
 154 };
 155 typedef struct CGSize CGSize;
 156 struct CGRect {
 157 };
 158 typedef struct CGRect CGRect;
 159 typedef mach_port_t io_object_t;
 160 typedef char io_name_t[128];
 161 typedef io_object_t io_iterator_t;
 162 typedef io_object_t io_service_t;
 163 typedef struct IONotificationPort * IONotificationPortRef;
 164 typedef void (*IOServiceMatchingCallback)(  void * refcon,  io_iterator_t iterator );
 165 io_service_t IOServiceGetMatchingService(  mach_port_t masterPort,  CFDictionaryRef matching );
 166 kern_return_t IOServiceGetMatchingServices(  mach_port_t masterPort,  CFDictionaryRef matching,  io_iterator_t * existing );
 167 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));
 168 kern_return_t IOServiceAddMatchingNotification(  IONotificationPortRef notifyPort,  const io_name_t notificationType,  CFDictionaryRef matching,         IOServiceMatchingCallback callback,         void * refCon,  io_iterator_t * notification );
 169 CFMutableDictionaryRef IOServiceMatching(  const char * name );
 170 CFMutableDictionaryRef IOServiceNameMatching(  const char * name );
 171 CFMutableDictionaryRef IOBSDNameMatching(  mach_port_t masterPort,  uint32_t options,  const char * bsdName );
 172 CFMutableDictionaryRef IOOpenFirmwarePathMatching(  mach_port_t masterPort,  uint32_t options,  const char * path );
 173 CFMutableDictionaryRef IORegistryEntryIDMatching(  uint64_t entryID );
 174 typedef struct __DASession * DASessionRef;
 175 extern DASessionRef DASessionCreate( CFAllocatorRef allocator );
 176 typedef struct __DADisk * DADiskRef;
 177 extern DADiskRef DADiskCreateFromBSDName( CFAllocatorRef allocator, DASessionRef session, const char * name );
 178 extern DADiskRef DADiskCreateFromIOMedia( CFAllocatorRef allocator, DASessionRef session, io_service_t media );
 179 extern CFDictionaryRef DADiskCopyDescription( DADiskRef disk );
 180 extern DADiskRef DADiskCopyWholeDisk( DADiskRef disk );
 181 @interface NSTask : NSObject - (id)init;
 182 @end                    typedef struct CGColorSpace *CGColorSpaceRef;
 183 typedef struct CGImage *CGImageRef;
 184 typedef struct CGLayer *CGLayerRef;
 185 @interface NSResponder : NSObject <NSCoding> {
 186 }
 187 @end    @protocol NSAnimatablePropertyContainer      - (id)animator;
 188 @end  extern NSString *NSAnimationTriggerOrderIn ;
 189 @interface NSView : NSResponder  <NSAnimatablePropertyContainer>  {
 190 }
 191 @end @protocol NSValidatedUserInterfaceItem - (SEL)action;
 192 @end   @protocol NSUserInterfaceValidations - (BOOL)validateUserInterfaceItem:(id <NSValidatedUserInterfaceItem>)anItem;
 193 @end  @class NSDate, NSDictionary, NSError, NSException, NSNotification;
 194 @interface NSApplication : NSResponder <NSUserInterfaceValidations> {
 195 }
 196 @end   enum {
 197 NSTerminateCancel = 0,         NSTerminateNow = 1,         NSTerminateLater = 2 };
 198 typedef NSUInteger NSApplicationTerminateReply;
 199 @protocol NSApplicationDelegate <NSObject> @optional        - (NSApplicationTerminateReply)applicationShouldTerminate:(NSApplication *)sender;
 200 @end  @class NSAttributedString, NSEvent, NSFont, NSFormatter, NSImage, NSMenu, NSText, NSView, NSTextView;
 201 @interface NSCell : NSObject <NSCopying, NSCoding> {
 202 }
 203 @end @class NSTextField, NSPanel, NSArray, NSWindow, NSImage, NSButton, NSError;
 204 typedef struct {
 205 }
 206 CVTimeStamp;
 207 @interface CIImage : NSObject <NSCoding, NSCopying> {
 208 }
 209 typedef int CIFormat;
 210 @end  enum {
 211 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 };
 212 typedef mach_error_t DAReturn;
 213 typedef const struct __DADissenter * DADissenterRef;
 214 extern DADissenterRef DADissenterCreate( CFAllocatorRef allocator, DAReturn status, CFStringRef string );
 215 @interface CIContext: NSObject {
 216 }
 217 - (CGImageRef)createCGImage:(CIImage *)im fromRect:(CGRect)r;
 218 - (CGImageRef)createCGImage:(CIImage *)im fromRect:(CGRect)r     format:(CIFormat)f colorSpace:(CGColorSpaceRef)cs;
 219 - (CGLayerRef)createCGLayerWithSize:(CGSize)size info:(CFDictionaryRef)d;
 220 @end extern NSString* const QCRendererEventKey;
 221 @protocol QCCompositionRenderer - (NSDictionary*) attributes;
 222 @end   @interface QCRenderer : NSObject <QCCompositionRenderer> {
 223 }
 224 - (id) createSnapshotImageOfType:(NSString*)type;
 225 @end  extern NSString* const QCViewDidStartRenderingNotification;
 226 @interface QCView : NSView <QCCompositionRenderer> {
 227 }
 228 - (id) createSnapshotImageOfType:(NSString*)type;
 229 @end    enum {
 230 ICEXIFOrientation1 = 1,     ICEXIFOrientation2 = 2,     ICEXIFOrientation3 = 3,     ICEXIFOrientation4 = 4,     ICEXIFOrientation5 = 5,     ICEXIFOrientation6 = 6,     ICEXIFOrientation7 = 7,     ICEXIFOrientation8 = 8, };
 231 @class ICDevice;
 232 @protocol ICDeviceDelegate <NSObject>  @required      - (void)didRemoveDevice:(ICDevice*)device;
 233 @end extern NSString *const ICScannerStatusWarmingUp;
 234 @class ICScannerDevice;
 235 @protocol ICScannerDeviceDelegate <ICDeviceDelegate>  @optional       - (void)scannerDeviceDidBecomeAvailable:(ICScannerDevice*)scanner;
 236 @end
 237
 238 typedef long unsigned int __darwin_size_t;
 239 typedef __darwin_size_t size_t;
 240 typedef unsigned long CFTypeID;
 241 struct CGPoint {
 242   CGFloat x;
 243   CGFloat y;
 244 };
 245 typedef struct CGPoint CGPoint;
 246 typedef struct CGGradient *CGGradientRef;
 247 typedef uint32_t CGGradientDrawingOptions;
 248 extern CFTypeID CGGradientGetTypeID(void);
 249 extern CGGradientRef CGGradientCreateWithColorComponents(CGColorSpaceRef
 250   space, const CGFloat components[], const CGFloat locations[], size_t count);
 251 extern CGGradientRef CGGradientCreateWithColors(CGColorSpaceRef space,
 252   CFArrayRef colors, const CGFloat locations[]);
 253 extern CGGradientRef CGGradientRetain(CGGradientRef gradient);
 254 extern void CGGradientRelease(CGGradientRef gradient);
 255 typedef struct CGContext *CGContextRef;
 256 extern void CGContextDrawLinearGradient(CGContextRef context,
 257     CGGradientRef gradient, CGPoint startPoint, CGPoint endPoint,
 258     CGGradientDrawingOptions options);
 259 extern CGColorSpaceRef CGColorSpaceCreateDeviceRGB(void);
 260
 261 //===----------------------------------------------------------------------===//
 262 // Test cases.
 263 //===----------------------------------------------------------------------===//
 264
 265 CFAbsoluteTime f1() {
 266   CFAbsoluteTime t = CFAbsoluteTimeGetCurrent();
 267   CFDateRef date = CFDateCreate(0, t);
 268   CFRetain(date);
 269   CFRelease(date);
 270   CFDateGetAbsoluteTime(date); // no-warning
 271   CFRelease(date);
 272   t = CFDateGetAbsoluteTime(date);   // expected-warning{{Reference-counted object is used after it is released.}}
 273   return t;
 274 }
 275
 276 CFAbsoluteTime f2() {
 277   CFAbsoluteTime t = CFAbsoluteTimeGetCurrent();
 278   CFDateRef date = CFDateCreate(0, t);
 279   [((NSDate*) date) retain];
 280   CFRelease(date);
 281   CFDateGetAbsoluteTime(date); // no-warning
 282   [((NSDate*) date) release];
 283   t = CFDateGetAbsoluteTime(date);   // expected-warning{{Reference-counted object is used after it is released.}}
 284   return t;
 285 }
 286
 287
 288 NSDate* global_x;
 289
 290 // Test to see if we supresss an error when we store the pointer
 291 // to a global.
 292
 293 CFAbsoluteTime f3() {
 294   CFAbsoluteTime t = CFAbsoluteTimeGetCurrent();
 295   CFDateRef date = CFDateCreate(0, t);
 296   [((NSDate*) date) retain];
 297   CFRelease(date);
 298   CFDateGetAbsoluteTime(date); // no-warning
 299   global_x = (NSDate*) date;
 300   [((NSDate*) date) release];
 301   t = CFDateGetAbsoluteTime(date);   // no-warning
 302   return t;
 303 }
 304
 305 //---------------------------------------------------------------------------
 306 // Test case 'f4' differs for region store and basic store.  See
 307 // retain-release-region-store.m and retain-release-basic-store.m.
 308 //---------------------------------------------------------------------------
 309
 310 // Test a leak.
 311
 312 CFAbsoluteTime f5(int x) {
 313   CFAbsoluteTime t = CFAbsoluteTimeGetCurrent();
 314   CFDateRef date = CFDateCreate(0, t); // expected-warning{{leak}}
 315
 316   if (x)
 317     CFRelease(date);
 318
 319   return t;
 320 }
 321
 322 // Test a leak involving the return.
 323
 324 CFDateRef f6(int x) {
 325   CFDateRef date = CFDateCreate(0, CFAbsoluteTimeGetCurrent());  // expected-warning{{leak}}
 326   CFRetain(date);
 327   return date;
 328 }
 329
 330 // Test a leak involving an overwrite.
 331
 332 CFDateRef f7() {
 333   CFDateRef date = CFDateCreate(0, CFAbsoluteTimeGetCurrent());  //expected-warning{{leak}}
 334   CFRetain(date);
 335   date = CFDateCreate(0, CFAbsoluteTimeGetCurrent());
 336   return date;
 337 }
 338
 339 // Generalization of Create rule.  MyDateCreate returns a CFXXXTypeRef, and
 340 // has the word create.
 341 CFDateRef MyDateCreate();
 342
 343 CFDateRef f8() {
 344   CFDateRef date = MyDateCreate(); // expected-warning{{leak}}
 345   CFRetain(date);
 346   return date;
 347 }
 348
 349 CFDateRef f9() {
 350   CFDateRef date = CFDateCreate(0, CFAbsoluteTimeGetCurrent());
 351   int *p = 0;
 352   // When allocations fail, CFDateCreate can return null.
 353   if (!date) *p = 1; // expected-warning{{null}}
 354   return date;
 355 }
 356
 357 // Handle DiskArbitration API:
 358 //
 359 // http://developer.apple.com/DOCUMENTATION/DARWIN/Reference/DiscArbitrationFramework/
 360 //
 361 void f10(io_service_t media, DADiskRef d, CFStringRef s) {
 362   DADiskRef disk = DADiskCreateFromBSDName(kCFAllocatorDefault, 0, "hello"); // expected-warning{{leak}}
 363   if (disk) NSLog(@"ok");
 364
 365   disk = DADiskCreateFromIOMedia(kCFAllocatorDefault, 0, media); // expected-warning{{leak}}
 366   if (disk) NSLog(@"ok");
 367
 368   CFDictionaryRef dict = DADiskCopyDescription(d);  // expected-warning{{leak}}
 369   if (dict) NSLog(@"ok");
 370
 371   disk = DADiskCopyWholeDisk(d); // expected-warning{{leak}}
 372   if (disk) NSLog(@"ok");
 373
 374   DADissenterRef dissenter = DADissenterCreate(kCFAllocatorDefault,   // expected-warning{{leak}}
 375                                                 kDAReturnSuccess, s);
 376   if (dissenter) NSLog(@"ok");
 377
 378   DASessionRef session = DASessionCreate(kCFAllocatorDefault);  // expected-warning{{leak}}
 379   if (session) NSLog(@"ok");
 380 }
 381
 382 // Test retain/release checker with CFString and CFMutableArray.
 383 void f11() {
 384   // Create the array.
 385   CFMutableArrayRef A = CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks);
 386
 387   // Create a string.
 388   CFStringRef s1 = CFStringCreateWithCString(0, "hello world",
 389                                              kCFStringEncodingUTF8);
 390
 391   // Add the string to the array.
 392   CFArrayAppendValue(A, s1);
 393
 394   // Decrement the reference count.
 395   CFRelease(s1); // no-warning
 396
 397   // Get the string.  We don't own it.
 398   s1 = (CFStringRef) CFArrayGetValueAtIndex(A, 0);
 399
 400   // Release the array.
 401   CFRelease(A); // no-warning
 402
 403   // Release the string.  This is a bug.
 404   CFRelease(s1); // expected-warning{{Incorrect decrement of the reference count}}
 405 }
 406
 407 // PR 3337: Handle functions declared using typedefs.
 408 typedef CFTypeRef CREATEFUN();
 409 CREATEFUN MyCreateFun;
 410
 411 void f12() {
 412   CFTypeRef o = MyCreateFun(); // expected-warning {{leak}}
 413 }
 414
 415 void f13_autorelease() {
 416   CFMutableArrayRef A = CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks); // no-warning
 417   [(id) A autorelease]; // no-warning
 418 }
 419
 420 void f13_autorelease_b() {
 421   CFMutableArrayRef A = CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks);
 422   [(id) A autorelease];
 423   [(id) A autorelease]; // expected-warning{{Object sent -autorelease too many times}}
 424 }
 425
 426 CFMutableArrayRef f13_autorelease_c() {
 427   CFMutableArrayRef A = CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks);
 428   [(id) A autorelease];
 429   [(id) A autorelease];
 430   return A; // expected-warning{{Object sent -autorelease too many times}}
 431 }
 432
 433 CFMutableArrayRef f13_autorelease_d() {
 434   CFMutableArrayRef A = CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks);
 435   [(id) A autorelease];
 436   [(id) A autorelease];
 437   CFMutableArrayRef B = CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks); // expected-warning{{Object sent -autorelease too many times}}
 438   CFRelease(B); // no-warning
 439   while (1) {}
 440 }
 441
 442
 443 // This case exercises the logic where the leak site is the same as the allocation site.
 444 void f14_leakimmediately() {
 445   CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks); // expected-warning{{leak}}
 446 }
 447
 448 // Test that we track an allocated object beyond the point where the *name*
 449 // of the variable storing the reference is no longer live.
 450 void f15() {
 451   // Create the array.
 452   CFMutableArrayRef A = CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks);
 453   CFMutableArrayRef *B = &A;
 454   // At this point, the name 'A' is no longer live.
 455   CFRelease(*B);  // no-warning
 456 }
 457
 458 // Test when we pass NULL to CFRetain/CFRelease.
 459 void f16(int x, CFTypeRef p) {
 460   if (p)
 461     return;
 462
 463   if (x) {
 464     CFRelease(p); // expected-warning{{Null pointer argument in call to CFRelease}}
 465   }
 466   else {
 467     CFRetain(p); // expected-warning{{Null pointer argument in call to CFRetain}}
 468   }
 469 }
 470
 471 // Test that an object is non-null after being CFRetained/CFReleased.
 472 void f17(int x, CFTypeRef p) {
 473   if (x) {
 474     CFRelease(p);
 475     if (!p)
 476       CFRelease(0); // no-warning
 477   }
 478   else {
 479     CFRetain(p);
 480     if (!p)
 481       CFRetain(0); // no-warning
 482   }
 483 }
 484
 485 // Test basic tracking of ivars associated with 'self'.  For the retain/release
 486 // checker we currently do not want to flag leaks associated with stores
 487 // of tracked objects to ivars.
 488 @interface SelfIvarTest : NSObject {
 489   id myObj;
 490 }
 491 - (void)test_self_tracking;
 492 @end
 493
 494 @implementation SelfIvarTest
 495 - (void)test_self_tracking {
 496   myObj = (id) CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks); // no-warning
 497 }
 498 @end
 499
 500 // Test return of non-owned objects in contexts where an owned object
 501 // is expected.
 502 @interface TestReturnNotOwnedWhenExpectedOwned
 503 - (NSString*)newString;
 504 @end
 505
 506 @implementation TestReturnNotOwnedWhenExpectedOwned
 507 - (NSString*)newString {
 508   NSString *s = [NSString stringWithUTF8String:"hello"];
 509   return s; // expected-warning{{Object with +0 retain counts returned to caller where a +1 (owning) retain count is expected}}
 510 }
 511 @end
 512
 513 // <rdar://problem/6659160>
 514 int isFoo(char c);
 515
 516 static void rdar_6659160(char *inkind, char *inname)
 517 {
 518   // We currently expect that [NSObject alloc] cannot fail.  This
 519   // will be a toggled flag in the future.  It can indeed return null, but
 520   // Cocoa programmers generally aren't expected to reason about out-of-memory
 521   // conditions.
 522   NSString *kind = [[NSString alloc] initWithUTF8String:inkind];  // expected-warning{{leak}}
 523
 524   // We do allow stringWithUTF8String to fail.  This isn't really correct, as
 525   // far as returning 0.  In most error conditions it will throw an exception.
 526   // If allocation fails it could return 0, but again this
 527   // isn't expected.
 528   NSString *name = [NSString stringWithUTF8String:inname];
 529   if(!name)
 530     return;
 531
 532   const char *kindC = 0;
 533   const char *nameC = 0;
 534
 535   // In both cases, we cannot reach a point down below where we
 536   // dereference kindC or nameC with either being null.  This is because
 537   // we assume that [NSObject alloc] doesn't fail and that we have the guard
 538   // up above.
 539
 540   if(kind)
 541     kindC = [kind UTF8String];
 542   if(name)
 543     nameC = [name UTF8String];
 544   if(!isFoo(kindC[0])) // expected-warning{{null}}
 545     return;
 546   if(!isFoo(nameC[0])) // no-warning
 547     return;
 548
 549   [kind release];
 550   [name release]; // expected-warning{{Incorrect decrement of the reference count}}
 551 }
 552
 553 // PR 3677 - 'allocWithZone' should be treated as following the Cocoa naming
 554 //  conventions with respect to 'return'ing ownership.
 555 @interface PR3677: NSObject @end
 556 @implementation PR3677
 557 + (id)allocWithZone:(NSZone *)inZone {
 558   return [super allocWithZone:inZone];  // no-warning
 559 }
 560 @end
 561
 562 // PR 3820 - Reason about calls to -dealloc
 563 void pr3820_DeallocInsteadOfRelease(void)
 564 {
 565   id foo = [[NSString alloc] init]; // no-warning
 566   [foo dealloc];
 567   // foo is not leaked, since it has been deallocated.
 568 }
 569
 570 void pr3820_ReleaseAfterDealloc(void)
 571 {
 572   id foo = [[NSString alloc] init];
 573   [foo dealloc];
 574   [foo release];  // expected-warning{{used after it is release}}
 575   // NSInternalInconsistencyException: message sent to deallocated object
 576 }
 577
 578 void pr3820_DeallocAfterRelease(void)
 579 {
 580   NSLog(@"\n\n[%s]", __FUNCTION__);
 581   id foo = [[NSString alloc] init];
 582   [foo release];
 583   [foo dealloc]; // expected-warning{{used after it is released}}
 584   // message sent to released object
 585 }
 586
 587 // From <rdar://problem/6704930>.  The problem here is that 'length' binds to
 588 // '($0 - 1)' after '--length', but SimpleConstraintManager doesn't know how to
 589 // reason about '($0 - 1) > constant'.  As a temporary hack, we drop the value
 590 // of '($0 - 1)' and conjure a new symbol.
 591 void rdar6704930(unsigned char *s, unsigned int length) {
 592   NSString* name = 0;
 593   if (s != 0) {
 594     if (length > 0) {
 595       while (length > 0) {
 596         if (*s == ':') {
 597           ++s;
 598           --length;
 599           name = [[NSString alloc] init]; // no-warning
 600           break;
 601         }
 602         ++s;
 603         --length;
 604       }
 605       if ((length == 0) && (name != 0)) {
 606         [name release];
 607         name = 0;
 608       }
 609       if (length == 0) { // no ':' found -> use it all as name
 610         name = [[NSString alloc] init]; // no-warning
 611       }
 612     }
 613   }
 614
 615   if (name != 0) {
 616     [name release];
 617   }
 618 }
 619
 620 //===----------------------------------------------------------------------===//
 621 // <rdar://problem/6833332>
 622 // One build of the analyzer accidentally stopped tracking the allocated
 623 // object after the 'retain'.
 624 //===----------------------------------------------------------------------===//
 625
 626 @interface rdar_6833332 : NSObject <NSApplicationDelegate> {
 627     NSWindow *window;
 628 }
 629 @property (nonatomic, retain) NSWindow *window;
 630 @end
 631
 632 @implementation rdar_6833332
 633 @synthesize window;
 634 - (void)applicationDidFinishLaunching:(NSNotification *)aNotification {
 635  NSMutableDictionary *dict = [[NSMutableDictionary dictionaryWithCapacity:4] retain]; // expected-warning{{leak}}
 636
 637  [dict setObject:@"foo" forKey:@"bar"];
 638
 639  NSLog(@"%@", dict);
 640 }
 641 - (void)dealloc {
 642     [window release];
 643     [super dealloc];
 644 }
 645 @end
 646
 647 //===----------------------------------------------------------------------===//
 648 // <rdar://problem/6257780> clang checker fails to catch use-after-release
 649 //===----------------------------------------------------------------------===//
 650
 651 int rdar_6257780_Case1() {
 652   NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
 653   NSArray *array = [NSArray array];
 654   [array release]; // expected-warning{{Incorrect decrement of the reference count of an object that is not owned at this point by the caller}}
 655   [pool drain];
 656   return 0;
 657 }
 658
 659 //===----------------------------------------------------------------------===//
 660 // <rdar://problem/6866843> Checker should understand new/setObject:/release constructs
 661 //===----------------------------------------------------------------------===//
 662
 663 void rdar_6866843() {
 664  NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
 665  NSMutableDictionary* dictionary = [[NSMutableDictionary alloc] init];
 666  NSArray* array = [[NSArray alloc] init];
 667  [dictionary setObject:array forKey:@"key"];
 668  [array release];
 669  // Using 'array' here should be fine
 670  NSLog(@"array = %@\n", array); // no-warning
 671  // Now the array is released
 672  [dictionary release];
 673  [pool drain];
 674 }
 675
 676
 677 //===----------------------------------------------------------------------===//
 678 // <rdar://problem/6877235> Classes typedef-ed to CF objects should get the same treatment as CF objects
 679 //===----------------------------------------------------------------------===//
 680
 681 typedef CFTypeRef OtherRef;
 682
 683 @interface RDar6877235 : NSObject {}
 684 - (CFTypeRef)_copyCFTypeRef;
 685 - (OtherRef)_copyOtherRef;
 686 @end
 687
 688 @implementation RDar6877235
 689 - (CFTypeRef)_copyCFTypeRef {
 690   return [[NSString alloc] init]; // no-warning
 691 }
 692 - (OtherRef)_copyOtherRef {
 693   return [[NSString alloc] init]; // no-warning
 694 }
 695 @end
 696
 697 //===----------------------------------------------------------------------===//
 698 //<rdar://problem/6320065> false positive - init method returns an object
 699 // owned by caller
 700 //===----------------------------------------------------------------------===//
 701
 702 @interface RDar6320065 : NSObject {
 703   NSString *_foo;
 704 }
 705 - (id)initReturningNewClass;
 706 - (id)_initReturningNewClassBad;
 707 - (id)initReturningNewClassBad2;
 708 @end
 709
 710 @interface RDar6320065Subclass : RDar6320065
 711 @end
 712
 713 @implementation RDar6320065
 714 - (id)initReturningNewClass {
 715   [self release];
 716   self = [[RDar6320065Subclass alloc] init]; // no-warning
 717   return self;
 718 }
 719 - (id)_initReturningNewClassBad {
 720   [self release];
 721   [[RDar6320065Subclass alloc] init]; // expected-warning {{leak}}
 722   return self;
 723 }
 724 - (id)initReturningNewClassBad2 {
 725   [self release];
 726   self = [[RDar6320065Subclass alloc] init];
 727   return [self autorelease]; // expected-warning{{Object with +0 retain counts returned to caller where a +1 (owning) retain count is expected}}
 728 }
 729
 730 @end
 731
 732 @implementation RDar6320065Subclass
 733 @end
 734
 735 int RDar6320065_test() {
 736   RDar6320065 *test = [[RDar6320065 alloc] init]; // no-warning
 737   [test release];
 738   return 0;
 739 }
 740
 741 //===----------------------------------------------------------------------===//
 742 // <rdar://problem/7129086> -awakeAfterUsingCoder: returns an owned object
 743 //  and claims the receiver
 744 //===----------------------------------------------------------------------===//
 745
 746 @interface RDar7129086 : NSObject {} @end
 747 @implementation RDar7129086
 748 - (id)awakeAfterUsingCoder:(NSCoder *)aDecoder {
 749   [self release]; // no-warning
 750   return [NSString alloc];  // no-warning
 751 }
 752 @end
 753
 754 //===----------------------------------------------------------------------===//
 755 // <rdar://problem/6859457> [NSData dataWithBytesNoCopy] does not return a
 756 //  retained object
 757 //===----------------------------------------------------------------------===//
 758
 759 @interface RDar6859457 : NSObject {}
 760 - (NSString*) NoCopyString;
 761 - (NSString*) noCopyString;
 762 @end
 763
 764 @implementation RDar6859457
 765 - (NSString*) NoCopyString { return [[NSString alloc] init]; } // expected-warning{{leak}}
 766 - (NSString*) noCopyString { return [[NSString alloc] init]; } // expected-warning{{leak}}
 767 @end
 768
 769 void test_RDar6859457(RDar6859457 *x, void *bytes, NSUInteger dataLength) {
 770   [x NoCopyString]; // no-warning
 771   [x noCopyString]; // no-warning
 772   [NSData dataWithBytesNoCopy:bytes length:dataLength];  // no-warning
 773   [NSData dataWithBytesNoCopy:bytes length:dataLength freeWhenDone:1]; // no-warning
 774 }
 775
 776 //===----------------------------------------------------------------------===//
 777 // PR 4230 - an autorelease pool is not necessarily leaked during a premature
 778 //  return
 779 //===----------------------------------------------------------------------===//
 780
 781 static void PR4230(void)
 782 {
 783   NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; // no-warning
 784   NSString *object = [[[NSString alloc] init] autorelease]; // no-warning
 785   return;
 786 }
 787
 788 //===----------------------------------------------------------------------===//
 789 // Method name that has a null IdentifierInfo* for its first selector slot.
 790 // This test just makes sure that we handle it.
 791 //===----------------------------------------------------------------------===//
 792
 793 @interface TestNullIdentifier
 794 @end
 795
 796 @implementation TestNullIdentifier
 797 + (id):(int)x, ... {
 798   return [[NSString alloc] init]; // expected-warning{{leak}}
 799 }
 800 @end
 801
 802 //===----------------------------------------------------------------------===//
 803 // <rdar://problem/6893565> don't flag leaks for return types that cannot be
 804 //                          determined to be CF types
 805 //===----------------------------------------------------------------------===//
 806
 807 // We don't know if 'struct s6893565' represents a Core Foundation type, so
 808 // we shouldn't emit an error here.
 809 typedef struct s6893565* TD6893565;
 810
 811 @interface RDar6893565 {}
 812 -(TD6893565)newThing;
 813 @end
 814
 815 @implementation RDar6893565
 816 -(TD6893565)newThing {
 817   return (TD6893565) [[NSString alloc] init]; // no-warning
 818 }
 819 @end
 820
 821 //===----------------------------------------------------------------------===//
 822 // <rdar://problem/6902710> clang: false positives w/QC and CoreImage methods
 823 //===----------------------------------------------------------------------===//
 824
 825 void rdar6902710(QCView *view, QCRenderer *renderer, CIContext *context,
 826                  NSString *str, CIImage *img, CGRect rect,
 827                  CIFormat form, CGColorSpaceRef cs) {
 828   [view createSnapshotImageOfType:str]; // expected-warning{{leak}}
 829   [renderer createSnapshotImageOfType:str]; // expected-warning{{leak}}
 830   [context createCGImage:img fromRect:rect]; // expected-warning{{leak}}
 831   [context createCGImage:img fromRect:rect format:form colorSpace:cs]; // expected-warning{{leak}}
 832 }
 833
 834 //===----------------------------------------------------------------------===//
 835 // <rdar://problem/6945561> -[CIContext createCGLayerWithSize:info:]
 836 //                           misinterpreted by clang scan-build
 837 //===----------------------------------------------------------------------===//
 838
 839 void rdar6945561(CIContext *context, CGSize size, CFDictionaryRef d) {
 840   [context createCGLayerWithSize:size info:d]; // expected-warning{{leak}}
 841 }
 842
 843 //===----------------------------------------------------------------------===//
 844 // <rdar://problem/6961230> add knowledge of IOKit functions to retain/release
 845 //                          checker
 846 //===----------------------------------------------------------------------===//
 847
 848 void IOBSDNameMatching_wrapper(mach_port_t masterPort, uint32_t options,  const char * bsdName) {
 849   IOBSDNameMatching(masterPort, options, bsdName); // expected-warning{{leak}}
 850 }
 851
 852 void IOServiceMatching_wrapper(const char * name) {
 853   IOServiceMatching(name); // expected-warning{{leak}}
 854 }
 855
 856 void IOServiceNameMatching_wrapper(const char * name) {
 857   IOServiceNameMatching(name); // expected-warning{{leak}}
 858 }
 859
 860 CF_RETURNS_RETAINED CFDictionaryRef CreateDict();
 861
 862 void IOServiceAddNotification_wrapper(mach_port_t masterPort, const io_name_t notificationType,
 863   mach_port_t wakePort, uintptr_t reference, io_iterator_t * notification ) {
 864
 865   CFDictionaryRef matching = CreateDict();
 866   CFRelease(matching);
 867   IOServiceAddNotification(masterPort, notificationType, matching, // expected-warning{{used after it is released}} expected-warning{{deprecated}}
 868                            wakePort, reference, notification);
 869 }
 870
 871 void IORegistryEntryIDMatching_wrapper(uint64_t entryID ) {
 872   IORegistryEntryIDMatching(entryID); // expected-warning{{leak}}
 873 }
 874
 875 void IOOpenFirmwarePathMatching_wrapper(mach_port_t masterPort, uint32_t options,
 876                                         const char * path) {
 877   IOOpenFirmwarePathMatching(masterPort, options, path); // expected-warning{{leak}}
 878 }
 879
 880 void IOServiceGetMatchingService_wrapper(mach_port_t masterPort) {
 881   CFDictionaryRef matching = CreateDict();
 882   IOServiceGetMatchingService(masterPort, matching);
 883   CFRelease(matching); // expected-warning{{used after it is released}}
 884 }
 885
 886 void IOServiceGetMatchingServices_wrapper(mach_port_t masterPort, io_iterator_t *existing) {
 887   CFDictionaryRef matching = CreateDict();
 888   IOServiceGetMatchingServices(masterPort, matching, existing);
 889   CFRelease(matching); // expected-warning{{used after it is released}}
 890 }
 891
 892 void IOServiceAddMatchingNotification_wrapper(IONotificationPortRef notifyPort, const io_name_t notificationType,
 893   IOServiceMatchingCallback callback, void * refCon, io_iterator_t * notification) {
 894
 895   CFDictionaryRef matching = CreateDict();
 896   IOServiceAddMatchingNotification(notifyPort, notificationType, matching, callback, refCon, notification);
 897   CFRelease(matching); // expected-warning{{used after it is released}}
 898 }
 899
 900 //===----------------------------------------------------------------------===//
 901 // Test of handling objects whose references "escape" to containers.
 902 //===----------------------------------------------------------------------===//
 903
 904 void CFDictionaryAddValue();
 905
 906 // <rdar://problem/6539791>
 907 void rdar_6539791(CFMutableDictionaryRef y, void* key, void* val_key) {
 908   CFMutableDictionaryRef x = CFDictionaryCreateMutable(kCFAllocatorDefault, 1, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
 909   CFDictionaryAddValue(y, key, x);
 910   CFRelease(x); // the dictionary keeps a reference, so the object isn't deallocated yet
 911   signed z = 1;
 912   CFNumberRef value = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &z);
 913   if (value) {
 914     CFDictionaryAddValue(x, val_key, value); // no-warning
 915     CFRelease(value);
 916     CFDictionaryAddValue(y, val_key, value); // no-warning
 917   }
 918 }
 919
 920 // <rdar://problem/6560661>
 921 // Same issue, except with "AppendValue" functions.
 922 void rdar_6560661(CFMutableArrayRef x) {
 923   signed z = 1;
 924   CFNumberRef value = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &z);
 925   // CFArrayAppendValue keeps a reference to value.
 926   CFArrayAppendValue(x, value);
 927   CFRelease(value);
 928   CFRetain(value);
 929   CFRelease(value); // no-warning
 930 }
 931
 932 // <rdar://problem/7152619>
 933 // Same issue, excwept with "CFAttributeStringSetAttribute".
 934 void rdar_7152619(CFStringRef str) {
 935   CFAttributedStringRef string = CFAttributedStringCreate(kCFAllocatorDefault, str, 0);
 936   CFMutableAttributedStringRef attrString = CFAttributedStringCreateMutableCopy(kCFAllocatorDefault, 100, string);
 937   CFRelease(string);
 938   NSNumber *number = [[NSNumber alloc] initWithInt:5]; // expected-warning{{leak}}
 939   CFAttributedStringSetAttribute(attrString, CFRangeMake(0, 1), str, number);
 940   [number release];
 941   [number retain];
 942   CFRelease(attrString);
 943 }
 944
 945 //===----------------------------------------------------------------------===//
 946 // Test of handling CGGradientXXX functions.
 947 //===----------------------------------------------------------------------===//
 948
 949 void rdar_7184450(CGContextRef myContext, CGFloat x, CGPoint myStartPoint,
 950                   CGPoint myEndPoint) {
 951   size_t num_locations = 6;
 952   CGFloat locations[6] = { 0.0, 0.265, 0.28, 0.31, 0.36, 1.0 };
 953   CGFloat components[28] = { 239.0/256.0, 167.0/256.0, 170.0/256.0,
 954      x,  // Start color
 955     207.0/255.0, 39.0/255.0, 39.0/255.0, x,
 956     147.0/255.0, 21.0/255.0, 22.0/255.0, x,
 957     175.0/255.0, 175.0/255.0, 175.0/255.0, x,
 958     255.0/255.0,255.0/255.0, 255.0/255.0, x,
 959     255.0/255.0,255.0/255.0, 255.0/255.0, x
 960   }; // End color
 961
 962   CGGradientRef myGradient =
 963     CGGradientCreateWithColorComponents(CGColorSpaceCreateDeviceRGB(), // expected-warning{{leak}}
 964       components, locations, num_locations);
 965
 966   CGContextDrawLinearGradient(myContext, myGradient, myStartPoint, myEndPoint,
 967                               0);
 968   CGGradientRelease(myGradient);
 969 }
 970
 971 void rdar_7184450_pos(CGContextRef myContext, CGFloat x, CGPoint myStartPoint,
 972                   CGPoint myEndPoint) {
 973   size_t num_locations = 6;
 974   CGFloat locations[6] = { 0.0, 0.265, 0.28, 0.31, 0.36, 1.0 };
 975   CGFloat components[28] = { 239.0/256.0, 167.0/256.0, 170.0/256.0,
 976      x,  // Start color
 977     207.0/255.0, 39.0/255.0, 39.0/255.0, x,
 978     147.0/255.0, 21.0/255.0, 22.0/255.0, x,
 979     175.0/255.0, 175.0/255.0, 175.0/255.0, x,
 980     255.0/255.0,255.0/255.0, 255.0/255.0, x,
 981     255.0/255.0,255.0/255.0, 255.0/255.0, x
 982   }; // End color
 983
 984   CGGradientRef myGradient =
 985    CGGradientCreateWithColorComponents(CGColorSpaceCreateDeviceRGB(), components, locations, num_locations); // expected-warning 2 {{leak}}
 986
 987   CGContextDrawLinearGradient(myContext, myGradient, myStartPoint, myEndPoint,
 988                               0);
 989 }
 990
 991 //===----------------------------------------------------------------------===//
 992 // <rdar://problem/7299394> clang false positive: retained instance passed to
 993 //                          thread in pthread_create marked as leak
 994 //
 995 // Until we have full IPA, the analyzer should stop tracking the reference
 996 // count of objects passed to pthread_create.
 997 //
 998 //===----------------------------------------------------------------------===//
 999
1000 struct _opaque_pthread_t {};
1001 struct _opaque_pthread_attr_t {};
1002 typedef struct _opaque_pthread_t *__darwin_pthread_t;
1003 typedef struct _opaque_pthread_attr_t __darwin_pthread_attr_t;
1004 typedef __darwin_pthread_t pthread_t;
1005 typedef __darwin_pthread_attr_t pthread_attr_t;
1006
1007 int pthread_create(pthread_t * restrict, const pthread_attr_t * restrict,
1008                    void *(*)(void *), void * restrict);
1009
1010 void *rdar_7299394_start_routine(void *p) {
1011   [((id) p) release];
1012   return 0;
1013 }
1014 void rdar_7299394(pthread_attr_t *attr, pthread_t *thread, void *args) {
1015   NSNumber *number = [[NSNumber alloc] initWithInt:5]; // no-warning
1016   pthread_create(thread, attr, rdar_7299394_start_routine, number);
1017 }
1018 void rdar_7299394_positive(pthread_attr_t *attr, pthread_t *thread) {
1019   NSNumber *number = [[NSNumber alloc] initWithInt:5]; // expected-warning{{leak}}
1020 }
1021
1022 //===----------------------------------------------------------------------===//
1023 // <rdar://problem/7283567> False leak associated with call to
1024 //                          CVPixelBufferCreateWithBytes ()
1025 //
1026 // According to the Core Video Reference (ADC), CVPixelBufferCreateWithBytes and
1027 // CVPixelBufferCreateWithPlanarBytes can release (via a callback) the
1028 // pixel buffer object.  These test cases show how the analyzer stops tracking
1029 // the reference count for the objects passed for this argument.  This
1030 // could be made smarter.
1031 //===----------------------------------------------------------------------===//
1032
1033 typedef int int32_t;
1034 typedef UInt32 FourCharCode;
1035 typedef FourCharCode OSType;
1036 typedef uint64_t CVOptionFlags;
1037 typedef int32_t CVReturn;
1038 typedef struct __CVBuffer *CVBufferRef;
1039 typedef CVBufferRef CVImageBufferRef;
1040 typedef CVImageBufferRef CVPixelBufferRef;
1041 typedef void (*CVPixelBufferReleaseBytesCallback)( void *releaseRefCon, const void *baseAddress );
1042
1043 extern CVReturn CVPixelBufferCreateWithBytes(CFAllocatorRef allocator,
1044             size_t width,
1045             size_t height,
1046             OSType pixelFormatType,
1047             void *baseAddress,
1048             size_t bytesPerRow,
1049             CVPixelBufferReleaseBytesCallback releaseCallback,
1050             void *releaseRefCon,
1051             CFDictionaryRef pixelBufferAttributes,
1052                    CVPixelBufferRef *pixelBufferOut) ;
1053
1054 typedef void (*CVPixelBufferReleasePlanarBytesCallback)( void *releaseRefCon, const void *dataPtr, size_t dataSize, size_t numberOfPlanes, const void *planeAddresses[] );
1055
1056 extern CVReturn CVPixelBufferCreateWithPlanarBytes(CFAllocatorRef allocator,
1057         size_t width,
1058         size_t height,
1059         OSType pixelFormatType,
1060         void *dataPtr,
1061         size_t dataSize,
1062         size_t numberOfPlanes,
1063         void *planeBaseAddress[],
1064         size_t planeWidth[],
1065         size_t planeHeight[],
1066         size_t planeBytesPerRow[],
1067         CVPixelBufferReleasePlanarBytesCallback releaseCallback,
1068         void *releaseRefCon,
1069         CFDictionaryRef pixelBufferAttributes,
1070         CVPixelBufferRef *pixelBufferOut) ;
1071
1072 extern CVReturn CVPixelBufferCreateWithBytes(CFAllocatorRef allocator,
1073             size_t width,
1074             size_t height,
1075             OSType pixelFormatType,
1076             void *baseAddress,
1077             size_t bytesPerRow,
1078             CVPixelBufferReleaseBytesCallback releaseCallback,
1079             void *releaseRefCon,
1080             CFDictionaryRef pixelBufferAttributes,
1081                    CVPixelBufferRef *pixelBufferOut) ;
1082
1083 CVReturn rdar_7283567(CFAllocatorRef allocator, size_t width, size_t height,
1084                       OSType pixelFormatType, void *baseAddress,
1085                       size_t bytesPerRow,
1086                       CVPixelBufferReleaseBytesCallback releaseCallback,
1087                       CFDictionaryRef pixelBufferAttributes,
1088                       CVPixelBufferRef *pixelBufferOut) {
1089
1090   // For the allocated object, it doesn't really matter what type it is
1091   // for the purpose of this test.  All we want to show is that
1092   // this is freed later by the callback.
1093   NSNumber *number = [[NSNumber alloc] initWithInt:5]; // no-warning
1094
1095   return CVPixelBufferCreateWithBytes(allocator, width, height, pixelFormatType,
1096                                 baseAddress, bytesPerRow, releaseCallback,
1097                                 number, // potentially released by callback
1098                                 pixelBufferAttributes, pixelBufferOut) ;
1099 }
1100
1101 CVReturn rdar_7283567_2(CFAllocatorRef allocator, size_t width, size_t height,
1102         OSType pixelFormatType, void *dataPtr, size_t dataSize,
1103         size_t numberOfPlanes, void *planeBaseAddress[],
1104         size_t planeWidth[], size_t planeHeight[], size_t planeBytesPerRow[],
1105         CVPixelBufferReleasePlanarBytesCallback releaseCallback,
1106         CFDictionaryRef pixelBufferAttributes,
1107         CVPixelBufferRef *pixelBufferOut) {
1108
1109     // For the allocated object, it doesn't really matter what type it is
1110     // for the purpose of this test.  All we want to show is that
1111     // this is freed later by the callback.
1112     NSNumber *number = [[NSNumber alloc] initWithInt:5]; // no-warning
1113
1114     return CVPixelBufferCreateWithPlanarBytes(allocator,
1115               width, height, pixelFormatType, dataPtr, dataSize,
1116               numberOfPlanes, planeBaseAddress, planeWidth,
1117               planeHeight, planeBytesPerRow, releaseCallback,
1118               number, // potentially released by callback
1119               pixelBufferAttributes, pixelBufferOut) ;
1120 }
1121
1122 //===----------------------------------------------------------------------===//
1123 // <rdar://problem/7358899> False leak associated with
1124 //  CGBitmapContextCreateWithData
1125 //===----------------------------------------------------------------------===//
1126 typedef uint32_t CGBitmapInfo;
1127 typedef void (*CGBitmapContextReleaseDataCallback)(void *releaseInfo, void *data);
1128
1129 CGContextRef CGBitmapContextCreateWithData(void *data,
1130     size_t width, size_t height, size_t bitsPerComponent,
1131     size_t bytesPerRow, CGColorSpaceRef space, CGBitmapInfo bitmapInfo,
1132     CGBitmapContextReleaseDataCallback releaseCallback, void *releaseInfo);
1133
1134 void rdar_7358899(void *data,
1135       size_t width, size_t height, size_t bitsPerComponent,
1136       size_t bytesPerRow, CGColorSpaceRef space, CGBitmapInfo bitmapInfo,
1137       CGBitmapContextReleaseDataCallback releaseCallback) {
1138
1139     // For the allocated object, it doesn't really matter what type it is
1140     // for the purpose of this test.  All we want to show is that
1141     // this is freed later by the callback.
1142     NSNumber *number = [[NSNumber alloc] initWithInt:5]; // no-warning
1143
1144   CGBitmapContextCreateWithData(data, width, height, bitsPerComponent, // expected-warning{{leak}}
1145     bytesPerRow, space, bitmapInfo, releaseCallback, number);
1146 }
1147
1148 //===----------------------------------------------------------------------===//
1149 // <rdar://problem/7265711> allow 'new', 'copy', 'alloc', 'init' prefix to
1150 //  start before '_' when determining Cocoa fundamental rule
1151 //
1152 // Previously the retain/release checker just skipped prefixes before the
1153 // first '_' entirely.  Now the checker honors the prefix if it results in a
1154 // recognizable naming convention (e.g., 'new', 'init').
1155 //===----------------------------------------------------------------------===//
1156
1157 @interface RDar7265711 {}
1158 - (id) new_stuff;
1159 @end
1160
1161 void rdar7265711_a(RDar7265711 *x) {
1162   id y = [x new_stuff]; // expected-warning{{leak}}
1163 }
1164
1165 void rdar7265711_b(RDar7265711 *x) {
1166   id y = [x new_stuff]; // no-warning
1167   [y release];
1168 }
1169
1170 //===----------------------------------------------------------------------===//
1171 // <rdar://problem/7306898> clang thinks [NSCursor dragCopyCursor] returns a
1172 //                          retained reference
1173 //===----------------------------------------------------------------------===//
1174
1175 @interface NSCursor : NSObject
1176 + (NSCursor *)dragCopyCursor;
1177 @end
1178
1179 void rdar7306898(void) {
1180   // 'dragCopyCursor' does not follow Cocoa's fundamental rule.  It is a noun, not an sentence
1181   // implying a 'copy' of something.
1182   NSCursor *c =  [NSCursor dragCopyCursor]; // no-warning
1183   NSNumber *number = [[NSNumber alloc] initWithInt:5]; // expected-warning{{leak}}
1184 }
1185
1186 //===----------------------------------------------------------------------===//
1187 // <rdar://problem/7252064> sending 'release', 'retain', etc. to a Class
1188 // directly is not likely what the user intended
1189 //===----------------------------------------------------------------------===//
1190
1191 @interface RDar7252064 : NSObject @end
1192 void rdar7252064(void) {
1193   [RDar7252064 release]; // expected-warning{{The 'release' message should be sent to instances of class 'RDar7252064' and not the class directly}}
1194   [RDar7252064 retain]; // expected-warning{{The 'retain' message should be sent to instances of class 'RDar7252064' and not the class directly}}
1195   [RDar7252064 autorelease]; // expected-warning{{The 'autorelease' message should be sent to instances of class 'RDar7252064' and not the class directly}}
1196   [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}}
1197 }
1198
1199 //===----------------------------------------------------------------------===//
1200 // Tests of ownership attributes.
1201 //===----------------------------------------------------------------------===//
1202
1203 typedef NSString* MyStringTy;
1204
1205 @protocol FooP;
1206
1207 @interface TestOwnershipAttr : NSObject
1208 - (NSString*) returnsAnOwnedString  NS_RETURNS_RETAINED; // no-warning
1209 - (NSString*) returnsAnOwnedCFString  CF_RETURNS_RETAINED; // no-warning
1210 - (MyStringTy) returnsAnOwnedTypedString NS_RETURNS_RETAINED; // no-warning
1211 - (NSString*) newString NS_RETURNS_NOT_RETAINED; // no-warning
1212 - (NSString*) newStringNoAttr;
1213 - (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}}
1214 @end
1215
1216 static int ownership_attribute_doesnt_go_here NS_RETURNS_RETAINED; // expected-warning{{'ns_returns_retained' attribute only applies to function or method types}}
1217
1218 void test_attr_1(TestOwnershipAttr *X) {
1219   NSString *str = [X returnsAnOwnedString]; // expected-warning{{leak}}
1220 }
1221
1222 void test_attr_1b(TestOwnershipAttr *X) {
1223   NSString *str = [X returnsAnOwnedCFString]; // expected-warning{{leak}}
1224 }
1225
1226 void test_attr1c(TestOwnershipAttr *X) {
1227   NSString *str = [X newString]; // no-warning
1228   NSString *str2 = [X newStringNoAttr]; // expected-warning{{leak}}
1229 }
1230
1231 @interface MyClassTestCFAttr : NSObject {}
1232 - (NSDate*) returnsCFRetained CF_RETURNS_RETAINED;
1233 - (CFDateRef) returnsCFRetainedAsCF CF_RETURNS_RETAINED;
1234 - (CFDateRef) newCFRetainedAsCF CF_RETURNS_NOT_RETAINED;
1235 - (CFDateRef) newCFRetainedAsCFNoAttr;
1236 - (NSDate*) alsoReturnsRetained;
1237 - (CFDateRef) alsoReturnsRetainedAsCF;
1238 - (NSDate*) returnsNSRetained NS_RETURNS_RETAINED;
1239 @end
1240
1241 CF_RETURNS_RETAINED
1242 CFDateRef returnsRetainedCFDate()  {
1243   return CFDateCreate(0, CFAbsoluteTimeGetCurrent());
1244 }
1245
1246 @implementation MyClassTestCFAttr
1247 - (NSDate*) returnsCFRetained {
1248   return (NSDate*) returnsRetainedCFDate(); // No leak.
1249 }
1250
1251 - (CFDateRef) returnsCFRetainedAsCF {
1252   return returnsRetainedCFDate(); // No leak.
1253 }
1254
1255 - (CFDateRef) newCFRetainedAsCF {
1256   return (CFDateRef)[(id)[self returnsCFRetainedAsCF] autorelease];
1257 }
1258
1259 - (CFDateRef) newCFRetainedAsCFNoAttr {
1260   return (CFDateRef)[(id)[self returnsCFRetainedAsCF] autorelease]; // expected-warning{{Object with +0 retain counts returned to caller where a +1 (owning) retain count is expected}}
1261 }
1262
1263 - (NSDate*) alsoReturnsRetained {
1264   return (NSDate*) returnsRetainedCFDate(); // expected-warning{{leak}}
1265 }
1266
1267 - (CFDateRef) alsoReturnsRetainedAsCF {
1268   return returnsRetainedCFDate(); // expected-warning{{leak}}
1269 }
1270
1271
1272 - (NSDate*) returnsNSRetained {
1273   return (NSDate*) returnsRetainedCFDate(); // no-warning
1274 }
1275 @end
1276
1277 //===----------------------------------------------------------------------===//
1278 // Test that leaks post-dominated by "panic" functions are not reported.
1279 //
1280 // <rdar://problem/5905851> do not report a leak when post-dominated by a call
1281 // to a noreturn or panic function
1282 //===----------------------------------------------------------------------===//
1283
1284 void panic() __attribute__((noreturn));
1285 void panic_not_in_hardcoded_list() __attribute__((noreturn));
1286
1287 void test_panic_negative() {
1288   signed z = 1;
1289   CFNumberRef value = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &z);  // expected-warning{{leak}}
1290 }
1291
1292 void test_panic_positive() {
1293   signed z = 1;
1294   CFNumberRef value = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &z); // no-warning
1295   panic();
1296 }
1297
1298 void test_panic_neg_2(int x) {
1299   signed z = 1;
1300   CFNumberRef value = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &z); // expected-warning{{leak}}
1301   if (x)
1302     panic();
1303 }
1304
1305 void test_panic_pos_2(int x) {
1306   signed z = 1;
1307   CFNumberRef value = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &z); // no-warning
1308   if (x)
1309     panic();
1310   if (!x) {
1311     // This showed up in <rdar://problem/7796563>, where we silently missed checking
1312     // the function type for noreturn.  "panic()" is a hard-coded known panic function
1313     // that isn't always noreturn.
1314     panic_not_in_hardcoded_list();
1315   }
1316 }
1317
1318 //===----------------------------------------------------------------------===//
1319 // Test uses of blocks (closures)
1320 //===----------------------------------------------------------------------===//
1321
1322 void test_blocks_1_pos(void) {
1323   NSNumber *number = [[NSNumber alloc] initWithInt:5]; // expected-warning{{leak}}
1324   ^{}();
1325 }
1326
1327 void test_blocks_1_indirect_release(void) {
1328   NSNumber *number = [[NSNumber alloc] initWithInt:5]; // no-warning
1329   ^{ [number release]; }();
1330 }
1331
1332 void test_blocks_1_indirect_retain(void) {
1333   // Eventually this should be reported as a leak.
1334   NSNumber *number = [[NSNumber alloc] initWithInt:5]; // no-warning
1335   ^{ [number retain]; }();
1336 }
1337
1338 void test_blocks_1_indirect_release_via_call(void) {
1339   NSNumber *number = [[NSNumber alloc] initWithInt:5]; // no-warning
1340   ^(NSObject *o){ [o release]; }(number);
1341 }
1342
1343 void test_blocks_1_indirect_retain_via_call(void) {
1344   // Eventually this should be reported as a leak.
1345   NSNumber *number = [[NSNumber alloc] initWithInt:5]; // no-warning
1346   ^(NSObject *o){ [o retain]; }(number);
1347 }
1348
1349 //===--------------------------------------------------------------------===//
1350 // Test sending message to super that returns an object alias.  Previously
1351 // this caused a crash in the analyzer.
1352 //===--------------------------------------------------------------------===//
1353
1354 @interface Rdar8015556 : NSObject {} @end
1355 @implementation Rdar8015556
1356 - (id)retain {
1357   return [super retain];
1358 }
1359 @end
1360
1361 // <rdar://problem/8272168> - Correcly handle Class<...> in Cocoa Conventions
1362 // detector.
1363
1364 @protocol Prot_R8272168 @end
1365 Class <Prot_R8272168> GetAClassThatImplementsProt_R8272168();
1366 void r8272168() {
1367   GetAClassThatImplementsProt_R8272168();
1368 }
1369
1370 // Test case for <rdar://problem/8356342>, which in the past triggered
1371 // a false positive.
1372 @interface RDar8356342
1373 - (NSDate*) rdar8356342:(NSDate *)inValue;
1374 @end
1375
1376 @implementation RDar8356342
1377 - (NSDate*) rdar8356342:(NSDate*)inValue {
1378   NSDate *outValue = inValue;
1379   if (outValue == 0)
1380     outValue = [[NSDate alloc] init]; // no-warning
1381
1382   if (outValue != inValue)
1383     [outValue autorelease];
1384
1385   return outValue;
1386 }
1387 @end
1388
1389 // <rdar://problem/8724287> - This test case previously crashed because
1390 // of a bug in BugReporter.
1391 extern const void *CFDictionaryGetValue(CFDictionaryRef theDict, const void *key);
1392 typedef struct __CFError * CFErrorRef;
1393 extern const CFStringRef kCFErrorUnderlyingErrorKey;
1394 extern CFDictionaryRef CFErrorCopyUserInfo(CFErrorRef err);
1395
1396 static void rdar_8724287(CFErrorRef error)
1397 {
1398     CFErrorRef error_to_dump;
1399
1400     error_to_dump = error;
1401     while (error_to_dump != ((void*)0)) {
1402         CFDictionaryRef info;
1403
1404         info = CFErrorCopyUserInfo(error_to_dump); // expected-warning{{Potential leak of an object allocated on line 1404 and stored into 'info'}}
1405
1406         if (info != ((void*)0)) {
1407         }
1408
1409         error_to_dump = (CFErrorRef) CFDictionaryGetValue(info, kCFErrorUnderlyingErrorKey);
1410     }
1411 }
1412