retain-release.m revision b9d8db86ab1d9c95c09083d8e9792414ae9fcd6d
1//>>SLICER 2// RUN: clang-cc -analyze -checker-cfref -verify %s && 3// RUN: clang-cc -analyze -checker-cfref -analyzer-store=region -verify %s 4 5//===----------------------------------------------------------------------===// 6// The following code is reduced using delta-debugging from Mac OS X headers: 7// 8// #include <Cocoa/Cocoa.h> 9// #include <CoreFoundation/CoreFoundation.h> 10// #include <DiskArbitration/DiskArbitration.h> 11// #include <QuartzCore/QuartzCore.h> 12// #include <Quartz/Quartz.h> 13// 14// It includes the basic definitions for the test cases below. 15//===----------------------------------------------------------------------===// 16 17typedef unsigned int __darwin_natural_t; 18typedef unsigned int UInt32; 19typedef signed long CFIndex; 20typedef const void * CFTypeRef; 21typedef const struct __CFString * CFStringRef; 22typedef const struct __CFAllocator * CFAllocatorRef; 23extern CFTypeRef CFRetain(CFTypeRef cf); 24extern void CFRelease(CFTypeRef cf); 25extern const CFAllocatorRef kCFAllocatorDefault; 26typedef struct { 27} 28CFArrayCallBacks; 29extern const CFArrayCallBacks kCFTypeArrayCallBacks; 30typedef const struct __CFArray * CFArrayRef; 31typedef struct __CFArray * CFMutableArrayRef; 32extern CFMutableArrayRef CFArrayCreateMutable(CFAllocatorRef allocator, CFIndex capacity, const CFArrayCallBacks *callBacks); 33extern const void *CFArrayGetValueAtIndex(CFArrayRef theArray, CFIndex idx); 34extern void CFArrayAppendValue(CFMutableArrayRef theArray, const void *value); 35typedef const struct __CFDictionary * CFDictionaryRef; 36typedef UInt32 CFStringEncoding; 37enum { 38kCFStringEncodingMacRoman = 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 }; 39extern CFStringRef CFStringCreateWithCString(CFAllocatorRef alloc, const char *cStr, CFStringEncoding encoding); 40typedef double CFTimeInterval; 41typedef CFTimeInterval CFAbsoluteTime; 42extern CFAbsoluteTime CFAbsoluteTimeGetCurrent(void); 43typedef const struct __CFDate * CFDateRef; 44extern CFDateRef CFDateCreate(CFAllocatorRef allocator, CFAbsoluteTime at); 45CFAbsoluteTime CFDateGetAbsoluteTime(CFDateRef theDate); 46enum { 47kCFCalendarComponentsWrap = (1UL << 0) }; 48typedef __darwin_natural_t natural_t; 49typedef natural_t mach_port_name_t; 50typedef mach_port_name_t mach_port_t; 51typedef int kern_return_t; 52typedef kern_return_t mach_error_t; 53typedef signed char BOOL; 54typedef unsigned long NSUInteger; 55typedef struct _NSZone NSZone; 56@class NSInvocation, NSMethodSignature, NSCoder, NSString, NSEnumerator; 57@protocol NSObject - (BOOL)isEqual:(id)object; 58- (id)retain; 59- (oneway void)release; 60- (id)autorelease; 61@end @protocol NSCopying - (id)copyWithZone:(NSZone *)zone; 62@end @protocol NSMutableCopying - (id)mutableCopyWithZone:(NSZone *)zone; 63@end @protocol NSCoding - (void)encodeWithCoder:(NSCoder *)aCoder; 64@end @interface NSObject <NSObject> { 65} 66+ (id)allocWithZone:(NSZone *)zone; 67+ (id)alloc; 68- (void)dealloc; 69@end extern id NSAllocateObject(Class aClass, NSUInteger extraBytes, NSZone *zone); 70typedef struct { 71} 72NSFastEnumerationState; 73@protocol NSFastEnumeration - (NSUInteger)countByEnumeratingWithState:(NSFastEnumerationState *)state objects:(id *)stackbuf count:(NSUInteger)len; 74@end @interface NSArray : NSObject <NSCopying, NSMutableCopying, NSCoding, NSFastEnumeration> - (NSUInteger)count; 75@end @interface NSArray (NSArrayCreation) + (id)array; 76@end @interface NSAutoreleasePool : NSObject { 77} 78- (void)drain; 79@end typedef double NSTimeInterval; 80@interface NSDate : NSObject <NSCopying, NSCoding> - (NSTimeInterval)timeIntervalSinceReferenceDate; 81@end enum { 82NSWrapCalendarComponents = kCFCalendarComponentsWrap, }; 83@interface NSString : NSObject <NSCopying, NSMutableCopying, NSCoding> - (NSUInteger)length; 84- ( const char *)UTF8String; 85- (id)initWithUTF8String:(const char *)nullTerminatedCString; 86+ (id)stringWithUTF8String:(const char *)nullTerminatedCString; 87@end @interface NSData : NSObject <NSCopying, NSMutableCopying, NSCoding> - (NSUInteger)length; 88+ (id)dataWithBytesNoCopy:(void *)bytes length:(NSUInteger)length; 89+ (id)dataWithBytesNoCopy:(void *)bytes length:(NSUInteger)length freeWhenDone:(BOOL)b; 90@end @interface NSDictionary : NSObject <NSCopying, NSMutableCopying, NSCoding, NSFastEnumeration> - (NSUInteger)count; 91@end @interface NSMutableDictionary : NSDictionary - (void)removeObjectForKey:(id)aKey; 92- (void)setObject:(id)anObject forKey:(id)aKey; 93@end @interface NSMutableDictionary (NSMutableDictionaryCreation) + (id)dictionaryWithCapacity:(NSUInteger)numItems; 94struct CGRect { 95}; 96typedef struct CGRect CGRect; 97- (id)init; 98typedef mach_port_t io_object_t; 99typedef io_object_t io_service_t; 100typedef struct __DASession * DASessionRef; 101extern DASessionRef DASessionCreate( CFAllocatorRef allocator ); 102typedef struct __DADisk * DADiskRef; 103extern DADiskRef DADiskCreateFromBSDName( CFAllocatorRef allocator, DASessionRef session, const char * name ); 104extern DADiskRef DADiskCreateFromIOMedia( CFAllocatorRef allocator, DASessionRef session, io_service_t media ); 105extern CFDictionaryRef DADiskCopyDescription( DADiskRef disk ); 106extern DADiskRef DADiskCopyWholeDisk( DADiskRef disk ); 107typedef struct CGColorSpace *CGColorSpaceRef; 108typedef struct CGImage *CGImageRef; 109@end @class CIContext; 110@class NSArray, NSError, NSEvent, NSMenu, NSUndoManager, NSWindow; 111@interface NSResponder : NSObject <NSCoding> { 112} 113@end @protocol NSAnimatablePropertyContainer - (id)animator; 114@end extern NSString *NSAnimationTriggerOrderIn ; 115@interface NSView : NSResponder <NSAnimatablePropertyContainer> { 116} 117@end @class NSColor, NSFont, NSNotification; 118@protocol NSValidatedUserInterfaceItem - (SEL)action; 119@end @protocol NSUserInterfaceValidations - (BOOL)validateUserInterfaceItem:(id <NSValidatedUserInterfaceItem>)anItem; 120@end typedef struct NSThreadPrivate _NSThreadPrivate; 121@interface NSApplication : NSResponder <NSUserInterfaceValidations> { 122} 123@end enum { 124NSTerminateCancel = 0, NSTerminateNow = 1, NSTerminateLater = 2 }; 125typedef NSUInteger NSApplicationTerminateReply; 126@protocol NSApplicationDelegate <NSObject> @optional - (NSApplicationTerminateReply)applicationShouldTerminate:(NSApplication *)sender; 127@end enum { 128NSUserInterfaceLayoutDirectionLeftToRight = 0, NSUserInterfaceLayoutDirectionRightToLeft = 1 }; 129@interface CIImage : NSObject <NSCoding, NSCopying> { 130} 131typedef int CIFormat; 132typedef struct __SFlags { 133} 134_SFlags; 135@end extern NSString * const kCAGravityCenter __attribute__((visibility("default"))); 136enum { 137kDAReturnSuccess = 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 }; 138typedef mach_error_t DAReturn; 139typedef const struct __DADissenter * DADissenterRef; 140extern DADissenterRef DADissenterCreate( CFAllocatorRef allocator, DAReturn status, CFStringRef string ); 141@interface CIContext: NSObject { 142} 143- (CGImageRef)createCGImage:(CIImage *)im fromRect:(CGRect)r; 144- (CGImageRef)createCGImage:(CIImage *)im fromRect:(CGRect)r format:(CIFormat)f colorSpace:(CGColorSpaceRef)cs; 145@end @protocol QCCompositionRenderer @end @interface QCRenderer : NSObject <QCCompositionRenderer> { 146} 147- (id) createSnapshotImageOfType:(NSString*)type; 148@end @interface QCView : NSView <QCCompositionRenderer> { 149} 150- (id) createSnapshotImageOfType:(NSString*)type; 151@end 152extern void NSLog(NSString *format, ...) __attribute__((format(__NSString__, 1, 2))); 153 154//===----------------------------------------------------------------------===// 155// Test cases. 156//===----------------------------------------------------------------------===// 157 158CFAbsoluteTime f1() { 159 CFAbsoluteTime t = CFAbsoluteTimeGetCurrent(); 160 CFDateRef date = CFDateCreate(0, t); 161 CFRetain(date); 162 CFRelease(date); 163 CFDateGetAbsoluteTime(date); // no-warning 164 CFRelease(date); 165 t = CFDateGetAbsoluteTime(date); // expected-warning{{Reference-counted object is used after it is released.}} 166 return t; 167} 168 169CFAbsoluteTime f2() { 170 CFAbsoluteTime t = CFAbsoluteTimeGetCurrent(); 171 CFDateRef date = CFDateCreate(0, t); 172 [((NSDate*) date) retain]; 173 CFRelease(date); 174 CFDateGetAbsoluteTime(date); // no-warning 175 [((NSDate*) date) release]; 176 t = CFDateGetAbsoluteTime(date); // expected-warning{{Reference-counted object is used after it is released.}} 177 return t; 178} 179 180 181NSDate* global_x; 182 183// Test to see if we supresss an error when we store the pointer 184// to a global. 185 186CFAbsoluteTime f3() { 187 CFAbsoluteTime t = CFAbsoluteTimeGetCurrent(); 188 CFDateRef date = CFDateCreate(0, t); 189 [((NSDate*) date) retain]; 190 CFRelease(date); 191 CFDateGetAbsoluteTime(date); // no-warning 192 global_x = (NSDate*) date; 193 [((NSDate*) date) release]; 194 t = CFDateGetAbsoluteTime(date); // no-warning 195 return t; 196} 197 198//--------------------------------------------------------------------------- 199// Test case 'f4' differs for region store and basic store. See 200// retain-release-region-store.m and retain-release-basic-store.m. 201//--------------------------------------------------------------------------- 202 203// Test a leak. 204 205CFAbsoluteTime f5(int x) { 206 CFAbsoluteTime t = CFAbsoluteTimeGetCurrent(); 207 CFDateRef date = CFDateCreate(0, t); // expected-warning{{leak}} 208 209 if (x) 210 CFRelease(date); 211 212 return t; 213} 214 215// Test a leak involving the return. 216 217CFDateRef f6(int x) { 218 CFDateRef date = CFDateCreate(0, CFAbsoluteTimeGetCurrent()); // expected-warning{{leak}} 219 CFRetain(date); 220 return date; 221} 222 223// Test a leak involving an overwrite. 224 225CFDateRef f7() { 226 CFDateRef date = CFDateCreate(0, CFAbsoluteTimeGetCurrent()); //expected-warning{{leak}} 227 CFRetain(date); 228 date = CFDateCreate(0, CFAbsoluteTimeGetCurrent()); 229 return date; 230} 231 232// Generalization of Create rule. MyDateCreate returns a CFXXXTypeRef, and 233// has the word create. 234CFDateRef MyDateCreate(); 235 236CFDateRef f8() { 237 CFDateRef date = MyDateCreate(); // expected-warning{{leak}} 238 CFRetain(date); 239 return date; 240} 241 242CFDateRef f9() { 243 CFDateRef date = CFDateCreate(0, CFAbsoluteTimeGetCurrent()); 244 int *p = 0; 245 // When allocations fail, CFDateCreate can return null. 246 if (!date) *p = 1; // expected-warning{{null}} 247 return date; 248} 249 250// Handle DiskArbitration API: 251// 252// http://developer.apple.com/DOCUMENTATION/DARWIN/Reference/DiscArbitrationFramework/ 253// 254void f10(io_service_t media, DADiskRef d, CFStringRef s) { 255 DADiskRef disk = DADiskCreateFromBSDName(kCFAllocatorDefault, 0, "hello"); // expected-warning{{leak}} 256 if (disk) NSLog(@"ok"); 257 258 disk = DADiskCreateFromIOMedia(kCFAllocatorDefault, 0, media); // expected-warning{{leak}} 259 if (disk) NSLog(@"ok"); 260 261 CFDictionaryRef dict = DADiskCopyDescription(d); // expected-warning{{leak}} 262 if (dict) NSLog(@"ok"); 263 264 disk = DADiskCopyWholeDisk(d); // expected-warning{{leak}} 265 if (disk) NSLog(@"ok"); 266 267 DADissenterRef dissenter = DADissenterCreate(kCFAllocatorDefault, // expected-warning{{leak}} 268 kDAReturnSuccess, s); 269 if (dissenter) NSLog(@"ok"); 270 271 DASessionRef session = DASessionCreate(kCFAllocatorDefault); // expected-warning{{leak}} 272 if (session) NSLog(@"ok"); 273} 274 275// Test retain/release checker with CFString and CFMutableArray. 276void f11() { 277 // Create the array. 278 CFMutableArrayRef A = CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks); 279 280 // Create a string. 281 CFStringRef s1 = CFStringCreateWithCString(0, "hello world", 282 kCFStringEncodingUTF8); 283 284 // Add the string to the array. 285 CFArrayAppendValue(A, s1); 286 287 // Decrement the reference count. 288 CFRelease(s1); // no-warning 289 290 // Get the string. We don't own it. 291 s1 = (CFStringRef) CFArrayGetValueAtIndex(A, 0); 292 293 // Release the array. 294 CFRelease(A); // no-warning 295 296 // Release the string. This is a bug. 297 CFRelease(s1); // expected-warning{{Incorrect decrement of the reference count}} 298} 299 300// PR 3337: Handle functions declared using typedefs. 301typedef CFTypeRef CREATEFUN(); 302CREATEFUN MyCreateFun; 303 304void f12() { 305 CFTypeRef o = MyCreateFun(); // expected-warning {{leak}} 306} 307 308void f13_autorelease() { 309 CFMutableArrayRef A = CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks); // no-warning 310 [(id) A autorelease]; // no-warning 311} 312 313void f13_autorelease_b() { 314 CFMutableArrayRef A = CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks); 315 [(id) A autorelease]; 316 [(id) A autorelease]; // expected-warning{{Object sent -autorelease too many times}} 317} 318 319CFMutableArrayRef f13_autorelease_c() { 320 CFMutableArrayRef A = CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks); 321 [(id) A autorelease]; 322 [(id) A autorelease]; 323 return A; // expected-warning{{Object sent -autorelease too many times}} 324} 325 326CFMutableArrayRef f13_autorelease_d() { 327 CFMutableArrayRef A = CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks); 328 [(id) A autorelease]; 329 [(id) A autorelease]; 330 CFMutableArrayRef B = CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks); // expected-warning{{Object sent -autorelease too many times}} 331 CFRelease(B); // no-warning 332} 333 334 335// This case exercises the logic where the leak site is the same as the allocation site. 336void f14_leakimmediately() { 337 CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks); // expected-warning{{leak}} 338} 339 340// Test that we track an allocated object beyond the point where the *name* 341// of the variable storing the reference is no longer live. 342void f15() { 343 // Create the array. 344 CFMutableArrayRef A = CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks); 345 CFMutableArrayRef *B = &A; 346 // At this point, the name 'A' is no longer live. 347 CFRelease(*B); // no-warning 348} 349 350 351// Test basic tracking of ivars associated with 'self'. For the retain/release 352// checker we currently do not want to flag leaks associated with stores 353// of tracked objects to ivars. 354@interface SelfIvarTest : NSObject { 355 id myObj; 356} 357- (void)test_self_tracking; 358@end 359 360@implementation SelfIvarTest 361- (void)test_self_tracking { 362 myObj = (id) CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks); // no-warning 363} 364@end 365 366// Test return of non-owned objects in contexts where an owned object 367// is expected. 368@interface TestReturnNotOwnedWhenExpectedOwned 369- (NSString*)newString; 370@end 371 372@implementation TestReturnNotOwnedWhenExpectedOwned 373- (NSString*)newString { 374 NSString *s = [NSString stringWithUTF8String:"hello"]; 375 return s; // expected-warning{{Object with +0 retain counts returned to caller where a +1 (owning) retain count is expected}} 376} 377@end 378 379// <rdar://problem/6659160> 380int isFoo(char c); 381 382static void rdar_6659160(char *inkind, char *inname) 383{ 384 // We currently expect that [NSObject alloc] cannot fail. This 385 // will be a toggled flag in the future. It can indeed return null, but 386 // Cocoa programmers generally aren't expected to reason about out-of-memory 387 // conditions. 388 NSString *kind = [[NSString alloc] initWithUTF8String:inkind]; // expected-warning{{leak}} 389 390 // We do allow stringWithUTF8String to fail. This isn't really correct, as 391 // far as returning 0. In most error conditions it will throw an exception. 392 // If allocation fails it could return 0, but again this 393 // isn't expected. 394 NSString *name = [NSString stringWithUTF8String:inname]; 395 if(!name) 396 return; 397 398 const char *kindC = 0; 399 const char *nameC = 0; 400 401 // In both cases, we cannot reach a point down below where we 402 // dereference kindC or nameC with either being null. This is because 403 // we assume that [NSObject alloc] doesn't fail and that we have the guard 404 // up above. 405 406 if(kind) 407 kindC = [kind UTF8String]; 408 if(name) 409 nameC = [name UTF8String]; 410 if(!isFoo(kindC[0])) // expected-warning{{null}} 411 return; 412 if(!isFoo(nameC[0])) // no-warning 413 return; 414 415 [kind release]; 416 [name release]; // expected-warning{{Incorrect decrement of the reference count}} 417} 418 419// PR 3677 - 'allocWithZone' should be treated as following the Cocoa naming 420// conventions with respect to 'return'ing ownership. 421@interface PR3677: NSObject @end 422@implementation PR3677 423+ (id)allocWithZone:(NSZone *)inZone { 424 return [super allocWithZone:inZone]; // no-warning 425} 426@end 427 428// PR 3820 - Reason about calls to -dealloc 429void pr3820_DeallocInsteadOfRelease(void) 430{ 431 id foo = [[NSString alloc] init]; // no-warning 432 [foo dealloc]; 433 // foo is not leaked, since it has been deallocated. 434} 435 436void pr3820_ReleaseAfterDealloc(void) 437{ 438 id foo = [[NSString alloc] init]; 439 [foo dealloc]; 440 [foo release]; // expected-warning{{used after it is release}} 441 // NSInternalInconsistencyException: message sent to deallocated object 442} 443 444void pr3820_DeallocAfterRelease(void) 445{ 446 NSLog(@"\n\n[%s]", __FUNCTION__); 447 id foo = [[NSString alloc] init]; 448 [foo release]; 449 [foo dealloc]; // expected-warning{{used after it is released}} 450 // message sent to released object 451} 452 453// From <rdar://problem/6704930>. The problem here is that 'length' binds to 454// '($0 - 1)' after '--length', but SimpleConstraintManager doesn't know how to 455// reason about '($0 - 1) > constant'. As a temporary hack, we drop the value 456// of '($0 - 1)' and conjure a new symbol. 457void rdar6704930(unsigned char *s, unsigned int length) { 458 NSString* name = 0; 459 if (s != 0) { 460 if (length > 0) { 461 while (length > 0) { 462 if (*s == ':') { 463 ++s; 464 --length; 465 name = [[NSString alloc] init]; // no-warning 466 break; 467 } 468 ++s; 469 --length; 470 } 471 if ((length == 0) && (name != 0)) { 472 [name release]; 473 name = 0; 474 } 475 if (length == 0) { // no ':' found -> use it all as name 476 name = [[NSString alloc] init]; // no-warning 477 } 478 } 479 } 480 481 if (name != 0) { 482 [name release]; 483 } 484} 485 486//===----------------------------------------------------------------------===// 487// <rdar://problem/6833332> 488// One build of the analyzer accidentally stopped tracking the allocated 489// object after the 'retain'. 490//===----------------------------------------------------------------------===// 491 492@interface rdar_6833332 : NSObject <NSApplicationDelegate> { 493 NSWindow *window; 494} 495@property (nonatomic, retain) NSWindow *window; 496@end 497 498@implementation rdar_6833332 499@synthesize window; 500- (void)applicationDidFinishLaunching:(NSNotification *)aNotification { 501 NSMutableDictionary *dict = [[NSMutableDictionary dictionaryWithCapacity:4] retain]; // expected-warning{{leak}} 502 503 [dict setObject:@"foo" forKey:@"bar"]; 504 505 NSLog(@"%@", dict); 506} 507- (void)dealloc { 508 [window release]; 509 [super dealloc]; 510} 511@end 512 513//===----------------------------------------------------------------------===// 514// <rdar://problem/6257780> clang checker fails to catch use-after-release 515//===----------------------------------------------------------------------===// 516 517int rdar_6257780_Case1() { 518 NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init]; 519 NSArray *array = [NSArray array]; 520 [array release]; // expected-warning{{Incorrect decrement of the reference count of an object is not owned at this point by the caller}} 521 [pool drain]; 522 return 0; 523} 524 525//===----------------------------------------------------------------------===// 526// <rdar://problem/6866843> Checker should understand new/setObject:/release constructs 527//===----------------------------------------------------------------------===// 528 529void rdar_6866843() { 530 NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init]; 531 NSMutableDictionary* dictionary = [[NSMutableDictionary alloc] init]; 532 NSArray* array = [[NSArray alloc] init]; 533 [dictionary setObject:array forKey:@"key"]; 534 [array release]; 535 // Using 'array' here should be fine 536 NSLog(@"array = %@\n", array); // no-warning 537 // Now the array is released 538 [dictionary release]; 539 [pool drain]; 540} 541 542 543//===----------------------------------------------------------------------===// 544// <rdar://problem/6877235> Classes typedef-ed to CF objects should get the same treatment as CF objects 545//===----------------------------------------------------------------------===// 546 547typedef CFTypeRef OtherRef; 548 549@interface RDar6877235 : NSObject {} 550- (CFTypeRef)_copyCFTypeRef; 551- (OtherRef)_copyOtherRef; 552@end 553 554@implementation RDar6877235 555- (CFTypeRef)_copyCFTypeRef { 556 return [[NSString alloc] init]; // no-warning 557} 558- (OtherRef)_copyOtherRef { 559 return [[NSString alloc] init]; // no-warning 560} 561@end 562 563//===----------------------------------------------------------------------===// 564//<rdar://problem/6320065> false positive - init method returns an object owned by caller 565//===----------------------------------------------------------------------===// 566 567@interface RDar6320065 : NSObject { 568 NSString *_foo; 569} 570- (id)initReturningNewClass; 571- (id)initReturningNewClassBad; 572- (id)initReturningNewClassBad2; 573@end 574 575@interface RDar6320065Subclass : RDar6320065 576@end 577 578@implementation RDar6320065 579- (id)initReturningNewClass { 580 [self release]; 581 self = [[RDar6320065Subclass alloc] init]; // no-warning 582 return self; 583} 584- (id)initReturningNewClassBad { 585 [self release]; 586 [[RDar6320065Subclass alloc] init]; // expected-warning {{leak}} 587 return self; 588} 589- (id)initReturningNewClassBad2 { 590 [self release]; 591 self = [[RDar6320065Subclass alloc] init]; 592 return [self autorelease]; // expected-warning{{Object with +0 retain counts returned to caller where a +1 (owning) retain count is expected}} 593} 594 595@end 596 597@implementation RDar6320065Subclass 598@end 599 600int RDar6320065_test() { 601 RDar6320065 *test = [[RDar6320065 alloc] init]; // no-warning 602 [test release]; 603 return 0; 604} 605 606//===----------------------------------------------------------------------===// 607// <rdar://problem/6859457> [NSData dataWithBytesNoCopy] does not return a retained object 608//===----------------------------------------------------------------------===// 609 610@interface RDar6859457 : NSObject {} 611- (NSString*) NoCopyString; 612- (NSString*) noCopyString; 613@end 614 615@implementation RDar6859457 616- (NSString*) NoCopyString { return [[NSString alloc] init]; } // no-warning 617- (NSString*) noCopyString { return [[NSString alloc] init]; } // no-warning 618@end 619 620void test_RDar6859457(RDar6859457 *x, void *bytes, NSUInteger dataLength) { 621 [x NoCopyString]; // expected-warning{{leak}} 622 [x noCopyString]; // expected-warning{{leak}} 623 [NSData dataWithBytesNoCopy:bytes length:dataLength]; // no-warning 624 [NSData dataWithBytesNoCopy:bytes length:dataLength freeWhenDone:1]; // no-warning 625} 626 627//===----------------------------------------------------------------------===// 628// PR 4230 - an autorelease pool is not necessarily leaked during a premature 629// return 630//===----------------------------------------------------------------------===// 631 632static void PR4230(void) 633{ 634 NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; // no-warning 635 NSString *object = [[[NSString alloc] init] autorelease]; // no-warning 636 return; 637} 638 639//===----------------------------------------------------------------------===// 640// Method name that has a null IdentifierInfo* for its first selector slot. 641// This test just makes sure that we handle it. 642//===----------------------------------------------------------------------===// 643 644@interface TestNullIdentifier 645@end 646 647@implementation TestNullIdentifier 648+ (id):(int)x, ... { 649 return [[NSString alloc] init]; // expected-warning{{leak}} 650} 651@end 652 653//===----------------------------------------------------------------------===// 654// <rdar://problem/6893565> don't flag leaks for return types that cannot be 655// determined to be CF types 656//===----------------------------------------------------------------------===// 657 658// We don't know if 'struct s6893565' represents a Core Foundation type, so 659// we shouldn't emit an error here. 660typedef struct s6893565* TD6893565; 661 662@interface RDar6893565 {} 663-(TD6893565)newThing; 664@end 665 666@implementation RDar6893565 667-(TD6893565)newThing { 668 return (TD6893565) [[NSString alloc] init]; // no-warning 669} 670@end 671 672//===----------------------------------------------------------------------===// 673// <rdar://problem/6902710> clang: false positives w/QC and CoreImage methods 674//===----------------------------------------------------------------------===// 675 676void rdar6902710(QCView *view, QCRenderer *renderer, CIContext *context, 677 NSString *str, CIImage *img, CGRect rect, 678 CIFormat form, CGColorSpaceRef cs) { 679 [view createSnapshotImageOfType:str]; // expected-warning{{leak}} 680 [renderer createSnapshotImageOfType:str]; // expected-warning{{leak}} 681 [context createCGImage:img fromRect:rect]; // expected-warning{{leak}} 682 [context createCGImage:img fromRect:rect format:form colorSpace:cs]; // expected-warning{{leak}} 683} 684 685//===----------------------------------------------------------------------===// 686// Tests of ownership attributes. 687//===----------------------------------------------------------------------===// 688 689typedef NSString* MyStringTy; 690 691@interface TestOwnershipAttr : NSObject 692- (NSString*) returnsAnOwnedString __attribute__((ns_returns_retained)); // no-warning 693- (NSString*) returnsAnOwnedCFString __attribute__((cf_returns_retained)); // no-warning 694- (MyStringTy) returnsAnOwnedTypedString __attribute__((ns_returns_retained)); // no-warning 695- (int) returnsAnOwnedInt __attribute__((ns_returns_retained)); // expected-warning{{'ns_returns_retained' attribute only applies to functions or methods that return a pointer or Objective-C object}} 696@end 697 698static int ownership_attribute_doesnt_go_here __attribute__((ns_returns_retained)); // expected-warning{{'ns_returns_retained' attribute only applies to function or method types}} 699 700void test_attr_1(TestOwnershipAttr *X) { 701 NSString *str = [X returnsAnOwnedString]; // expected-warning{{leak}} 702} 703 704void test_attr_1b(TestOwnershipAttr *X) { 705 NSString *str = [X returnsAnOwnedCFString]; // expected-warning{{leak}} 706} 707 708@interface MyClassTestCFAttr : NSObject {} 709- (NSDate*) returnsCFRetained __attribute__((cf_returns_retained)); 710- (NSDate*) alsoReturnsRetained; 711- (NSDate*) returnsNSRetained __attribute__((ns_returns_retained)); 712@end 713 714__attribute__((cf_returns_retained)) 715CFDateRef returnsRetainedCFDate() { 716 return CFDateCreate(0, CFAbsoluteTimeGetCurrent()); 717} 718 719@implementation MyClassTestCFAttr 720- (NSDate*) returnsCFRetained { 721 return (NSDate*) returnsRetainedCFDate(); // No leak. 722} 723 724- (NSDate*) alsoReturnsRetained { 725 return (NSDate*) returnsRetainedCFDate(); // expected-warning{{leak}} 726} 727 728- (NSDate*) returnsNSRetained { 729 return (NSDate*) returnsRetainedCFDate(); // no-warning 730} 731@end 732 733 734 735