retain-release.m revision 304376651e85a6f84055ffa0b42517f8631e7f6b 
1// RUN: clang-cc -analyze -checker-cfref -verify %s &&
2// RUN: clang-cc -analyze -checker-cfref -analyzer-store=region -verify %s
3
4
5//===----------------------------------------------------------------------===//
6// The following code is reduced using delta-debugging from
7// Foundation.h (Mac OS X).
8//
9// It includes the basic definitions for the test cases below.
10// Not including Foundation.h directly makes this test case both svelte and
11// portable to non-Mac platforms.
12//===----------------------------------------------------------------------===//
13
14typedef unsigned int __darwin_natural_t;
15typedef unsigned int UInt32;
16typedef signed long CFIndex;
17typedef const void * CFTypeRef;
18typedef const struct __CFString * CFStringRef;
19typedef const struct __CFAllocator * CFAllocatorRef;
20extern const CFAllocatorRef kCFAllocatorDefault;
21extern CFTypeRef CFRetain(CFTypeRef cf);
22extern void CFRelease(CFTypeRef cf);
23typedef struct {
24}
25CFArrayCallBacks;
26extern const CFArrayCallBacks kCFTypeArrayCallBacks;
27typedef const struct __CFArray * CFArrayRef;
28typedef struct __CFArray * CFMutableArrayRef;
29extern CFMutableArrayRef CFArrayCreateMutable(CFAllocatorRef allocator, CFIndex capacity, const CFArrayCallBacks *callBacks);
30extern const void *CFArrayGetValueAtIndex(CFArrayRef theArray, CFIndex idx);
31extern void CFArrayAppendValue(CFMutableArrayRef theArray, const void *value);
32typedef const struct __CFDictionary * CFDictionaryRef;
33typedef UInt32 CFStringEncoding;
34enum {
35kCFStringEncodingMacRoman = 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  };
36extern CFStringRef CFStringCreateWithCString(CFAllocatorRef alloc, const char *cStr, CFStringEncoding encoding);
37typedef double CFTimeInterval;
38typedef CFTimeInterval CFAbsoluteTime;
39extern CFAbsoluteTime CFAbsoluteTimeGetCurrent(void);
40typedef const struct __CFDate * CFDateRef;
41extern CFDateRef CFDateCreate(CFAllocatorRef allocator, CFAbsoluteTime at);
42extern CFAbsoluteTime CFDateGetAbsoluteTime(CFDateRef theDate);
43typedef __darwin_natural_t natural_t;
44typedef natural_t mach_port_name_t;
45typedef mach_port_name_t mach_port_t;
46typedef int kern_return_t;
47typedef kern_return_t mach_error_t;
48typedef struct objc_selector *SEL;
49typedef signed char BOOL;
50typedef unsigned long NSUInteger;
51@class NSString, Protocol;
52extern void NSLog(NSString *format, ...) __attribute__((format(__NSString__, 1, 2)));
53typedef struct _NSZone NSZone;
54@class NSInvocation, NSMethodSignature, NSCoder, NSString, NSEnumerator;
55@protocol NSObject  - (BOOL)isEqual:(id)object;
56- (id)retain;
57- (oneway void)release;
58- (id)autorelease;
59@end  @protocol NSCopying  - (id)copyWithZone:(NSZone *)zone;
60@end  @protocol NSMutableCopying  - (id)mutableCopyWithZone:(NSZone *)zone;
61@end  @protocol NSCoding  - (void)encodeWithCoder:(NSCoder *)aCoder;
62@end    @interface NSObject <NSObject> {
63}
64+ (id)allocWithZone:(NSZone *)zone;
65+ (id)alloc;
66- (void)dealloc;
67@end      extern id NSAllocateObject(Class aClass, NSUInteger extraBytes, NSZone *zone);
68typedef struct {
69}
70NSFastEnumerationState;
71@protocol NSFastEnumeration  - (NSUInteger)countByEnumeratingWithState:(NSFastEnumerationState *)state objects:(id *)stackbuf count:(NSUInteger)len;
72@end           @class NSString, NSDictionary;
73typedef double NSTimeInterval;
74@interface NSDate : NSObject <NSCopying, NSCoding>  - (NSTimeInterval)timeIntervalSinceReferenceDate;
75@end            typedef unsigned short unichar;
76@interface NSString : NSObject <NSCopying, NSMutableCopying, NSCoding>    - (NSUInteger)length;
77- ( const char *)UTF8String;
78- (id)initWithUTF8String:(const char *)nullTerminatedCString;
79+ (id)stringWithUTF8String:(const char *)nullTerminatedCString;
80@end        @class NSDictionary;
81@interface NSDictionary : NSObject <NSCopying, NSMutableCopying, NSCoding, NSFastEnumeration>  - (NSUInteger)count;
82@end    @interface NSMutableDictionary : NSDictionary  - (void)removeObjectForKey:(id)aKey;
83- (void)setObject:(id)anObject forKey:(id)aKey;
84@end  @interface NSMutableDictionary (NSMutableDictionaryCreation)  + (id)dictionaryWithCapacity:(NSUInteger)numItems;
85@end @class NSString, NSDictionary, NSArray;
86typedef mach_port_t io_object_t;
87typedef io_object_t io_service_t;
88typedef struct __DASession * DASessionRef;
89extern DASessionRef DASessionCreate( CFAllocatorRef allocator );
90typedef struct __DADisk * DADiskRef;
91extern DADiskRef DADiskCreateFromBSDName( CFAllocatorRef allocator, DASessionRef session, const char * name );
92extern DADiskRef DADiskCreateFromIOMedia( CFAllocatorRef allocator, DASessionRef session, io_service_t media );
93extern CFDictionaryRef DADiskCopyDescription( DADiskRef disk );
94extern DADiskRef DADiskCopyWholeDisk( DADiskRef disk );
95@interface NSTask : NSObject - (id)init;
96@end  extern NSString * const NSTaskDidTerminateNotification;
97@interface NSResponder : NSObject <NSCoding> {
98struct __vaFlags {
99}
100_vaFlags;
101}
102@end    @protocol NSAnimatablePropertyContainer      - (id)animator;
103@end  extern NSString *NSAnimationTriggerOrderIn ;
104@class NSBitmapImageRep, NSCursor, NSGraphicsContext, NSImage, NSPasteboard, NSScrollView, NSTextInputContext, NSWindow, NSAttributedString;
105@interface NSView : NSResponder  <NSAnimatablePropertyContainer>  {
106struct __VFlags2 {
107}
108_vFlags2;
109}
110@end  @class NSColor, NSFont, NSNotification;
111@interface NSTextTab : NSObject <NSCopying, NSCoding> {
112}
113@end @protocol NSValidatedUserInterfaceItem - (SEL)action;
114@end   @protocol NSUserInterfaceValidations - (BOOL)validateUserInterfaceItem:(id <NSValidatedUserInterfaceItem>)anItem;
115@end @class NSArray, NSError, NSImage, NSView, NSNotificationCenter, NSURL, NSScreen, NSRunningApplication;
116@interface NSApplication : NSResponder <NSUserInterfaceValidations> {
117}
118@end   enum {
119NSTerminateCancel = 0,         NSTerminateNow = 1,         NSTerminateLater = 2 };
120typedef NSUInteger NSApplicationTerminateReply;
121@protocol NSApplicationDelegate <NSObject> @optional        - (NSApplicationTerminateReply)applicationShouldTerminate:(NSApplication *)sender;
122@end    enum {
123NSUserInterfaceLayoutDirectionLeftToRight = 0,     NSUserInterfaceLayoutDirectionRightToLeft = 1 };
124@interface NSManagedObject : NSObject {
125}
126@end enum {
127kDAReturnSuccess = 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 };
128typedef mach_error_t DAReturn;
129typedef const struct __DADissenter * DADissenterRef;
130extern DADissenterRef DADissenterCreate( CFAllocatorRef allocator, DAReturn status, CFStringRef string );
131
132 @interface NSArray : NSObject <NSCopying, NSMutableCopying, NSCoding, NSFastEnumeration>
133 - (NSUInteger)count;
134 + (id)array;
135 @end
136 
137@interface NSAutoreleasePool : NSObject {}
138+ (void)addObject:(id)anObject;
139- (void)addObject:(id)anObject;
140- (void)drain;
141@end
142
143@interface NSData : NSObject {}
144+ (id)dataWithBytesNoCopy:(void *)bytes length:(NSUInteger)length;
145+ (id)dataWithBytesNoCopy:(void *)bytes length:(NSUInteger)length freeWhenDone:(BOOL)b;
146@end
147
148//===----------------------------------------------------------------------===//
149// Test cases.
150//===----------------------------------------------------------------------===//
151
152CFAbsoluteTime f1() {
153  CFAbsoluteTime t = CFAbsoluteTimeGetCurrent();
154  CFDateRef date = CFDateCreate(0, t);
155  CFRetain(date);
156  CFRelease(date);
157  CFDateGetAbsoluteTime(date); // no-warning
158  CFRelease(date);
159  t = CFDateGetAbsoluteTime(date);   // expected-warning{{Reference-counted object is used after it is released.}}
160  return t;
161}
162
163CFAbsoluteTime f2() {
164  CFAbsoluteTime t = CFAbsoluteTimeGetCurrent();
165  CFDateRef date = CFDateCreate(0, t);  
166  [((NSDate*) date) retain];
167  CFRelease(date);
168  CFDateGetAbsoluteTime(date); // no-warning
169  [((NSDate*) date) release];
170  t = CFDateGetAbsoluteTime(date);   // expected-warning{{Reference-counted object is used after it is released.}}
171  return t;
172}
173
174
175NSDate* global_x;
176
177// Test to see if we supresss an error when we store the pointer
178// to a global.
179
180CFAbsoluteTime f3() {
181  CFAbsoluteTime t = CFAbsoluteTimeGetCurrent();
182  CFDateRef date = CFDateCreate(0, t);  
183  [((NSDate*) date) retain];
184  CFRelease(date);
185  CFDateGetAbsoluteTime(date); // no-warning
186  global_x = (NSDate*) date;  
187  [((NSDate*) date) release];
188  t = CFDateGetAbsoluteTime(date);   // no-warning
189  return t;
190}
191
192//---------------------------------------------------------------------------
193// Test case 'f4' differs for region store and basic store.  See
194// retain-release-region-store.m and retain-release-basic-store.m.
195//---------------------------------------------------------------------------
196
197// Test a leak.
198
199CFAbsoluteTime f5(int x) {  
200  CFAbsoluteTime t = CFAbsoluteTimeGetCurrent();
201  CFDateRef date = CFDateCreate(0, t); // expected-warning{{leak}}
202  
203  if (x)
204    CFRelease(date);
205  
206  return t;
207}
208
209// Test a leak involving the return.
210
211CFDateRef f6(int x) {  
212  CFDateRef date = CFDateCreate(0, CFAbsoluteTimeGetCurrent());  // expected-warning{{leak}}
213  CFRetain(date);
214  return date;
215}
216
217// Test a leak involving an overwrite.
218
219CFDateRef f7() {
220  CFDateRef date = CFDateCreate(0, CFAbsoluteTimeGetCurrent());  //expected-warning{{leak}}
221  CFRetain(date);
222  date = CFDateCreate(0, CFAbsoluteTimeGetCurrent());
223  return date;
224}
225
226// Generalization of Create rule.  MyDateCreate returns a CFXXXTypeRef, and
227// has the word create.
228CFDateRef MyDateCreate();
229
230CFDateRef f8() {
231  CFDateRef date = MyDateCreate(); // expected-warning{{leak}}
232  CFRetain(date);  
233  return date;
234}
235
236CFDateRef f9() {
237  CFDateRef date = CFDateCreate(0, CFAbsoluteTimeGetCurrent());
238  int *p = 0;
239  // When allocations fail, CFDateCreate can return null.
240  if (!date) *p = 1; // expected-warning{{null}}
241  return date;
242}
243
244// Handle DiskArbitration API:
245//
246// http://developer.apple.com/DOCUMENTATION/DARWIN/Reference/DiscArbitrationFramework/
247//
248void f10(io_service_t media, DADiskRef d, CFStringRef s) {
249  DADiskRef disk = DADiskCreateFromBSDName(kCFAllocatorDefault, 0, "hello"); // expected-warning{{leak}}
250  if (disk) NSLog(@"ok");
251  
252  disk = DADiskCreateFromIOMedia(kCFAllocatorDefault, 0, media); // expected-warning{{leak}}
253  if (disk) NSLog(@"ok");
254
255  CFDictionaryRef dict = DADiskCopyDescription(d);  // expected-warning{{leak}}
256  if (dict) NSLog(@"ok"); 
257  
258  disk = DADiskCopyWholeDisk(d); // expected-warning{{leak}}
259  if (disk) NSLog(@"ok");
260    
261  DADissenterRef dissenter = DADissenterCreate(kCFAllocatorDefault,   // expected-warning{{leak}}
262                                                kDAReturnSuccess, s);
263  if (dissenter) NSLog(@"ok");
264  
265  DASessionRef session = DASessionCreate(kCFAllocatorDefault);  // expected-warning{{leak}}
266  if (session) NSLog(@"ok");
267}
268
269// Test retain/release checker with CFString and CFMutableArray.
270void f11() {
271  // Create the array.
272  CFMutableArrayRef A = CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks);
273
274  // Create a string.
275  CFStringRef s1 = CFStringCreateWithCString(0, "hello world",
276                                             kCFStringEncodingUTF8);
277
278  // Add the string to the array.
279  CFArrayAppendValue(A, s1);
280  
281  // Decrement the reference count.
282  CFRelease(s1); // no-warning
283  
284  // Get the string.  We don't own it.
285  s1 = (CFStringRef) CFArrayGetValueAtIndex(A, 0);
286  
287  // Release the array.
288  CFRelease(A); // no-warning
289  
290  // Release the string.  This is a bug.
291  CFRelease(s1); // expected-warning{{Incorrect decrement of the reference count}}
292}
293
294// PR 3337: Handle functions declared using typedefs.
295typedef CFTypeRef CREATEFUN();
296CREATEFUN MyCreateFun;
297
298void f12() {
299  CFTypeRef o = MyCreateFun(); // expected-warning {{leak}}
300}
301
302void f13_autorelease() {
303  CFMutableArrayRef A = CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks); // no-warning
304  [(id) A autorelease]; // no-warning
305}
306
307void f13_autorelease_b() {
308  CFMutableArrayRef A = CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks);
309  [(id) A autorelease];
310  [(id) A autorelease]; // expected-warning{{Object sent -autorelease too many times}}
311}
312
313CFMutableArrayRef f13_autorelease_c() {
314  CFMutableArrayRef A = CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks);
315  [(id) A autorelease];
316  [(id) A autorelease]; 
317  return A; // expected-warning{{Object sent -autorelease too many times}}
318}
319
320CFMutableArrayRef f13_autorelease_d() {
321  CFMutableArrayRef A = CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks);
322  [(id) A autorelease];
323  [(id) A autorelease]; 
324  CFMutableArrayRef B = CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks); // expected-warning{{Object sent -autorelease too many times}}
325  CFRelease(B); // no-warning
326}
327
328
329// This case exercises the logic where the leak site is the same as the allocation site.
330void f14_leakimmediately() {
331  CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks); // expected-warning{{leak}}
332}
333
334// Test that we track an allocated object beyond the point where the *name*
335// of the variable storing the reference is no longer live.
336void f15() {
337  // Create the array.
338  CFMutableArrayRef A = CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks);
339  CFMutableArrayRef *B = &A;
340  // At this point, the name 'A' is no longer live.
341  CFRelease(*B);  // no-warning
342}
343
344
345// Test basic tracking of ivars associated with 'self'.  For the retain/release
346// checker we currently do not want to flag leaks associated with stores
347// of tracked objects to ivars.
348@interface SelfIvarTest : NSObject {
349  id myObj;
350}
351- (void)test_self_tracking;
352@end
353
354@implementation SelfIvarTest
355- (void)test_self_tracking {
356  myObj = (id) CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks); // no-warning
357}
358@end
359
360// Test return of non-owned objects in contexts where an owned object
361// is expected.
362@interface TestReturnNotOwnedWhenExpectedOwned
363- (NSString*)newString;
364@end
365
366@implementation TestReturnNotOwnedWhenExpectedOwned
367- (NSString*)newString {
368  NSString *s = [NSString stringWithUTF8String:"hello"];
369  return s; // expected-warning{{Object with +0 retain counts returned to caller where a +1 (owning) retain count is expected}}
370}
371@end
372
373// <rdar://problem/6659160>
374int isFoo(char c);
375
376static void rdar_6659160(char *inkind, char *inname)
377{
378  // We currently expect that [NSObject alloc] cannot fail.  This
379  // will be a toggled flag in the future.  It can indeed return null, but
380  // Cocoa programmers generally aren't expected to reason about out-of-memory
381  // conditions.
382  NSString *kind = [[NSString alloc] initWithUTF8String:inkind];  // expected-warning{{leak}}
383  
384  // We do allow stringWithUTF8String to fail.  This isn't really correct, as
385  // far as returning 0.  In most error conditions it will throw an exception.
386  // If allocation fails it could return 0, but again this
387  // isn't expected.
388  NSString *name = [NSString stringWithUTF8String:inname];
389  if(!name)
390    return;
391
392  const char *kindC = 0;
393  const char *nameC = 0;
394  
395  // In both cases, we cannot reach a point down below where we
396  // dereference kindC or nameC with either being null.  This is because
397  // we assume that [NSObject alloc] doesn't fail and that we have the guard
398  // up above.
399  
400  if(kind)
401    kindC = [kind UTF8String];
402  if(name)
403    nameC = [name UTF8String];
404  if(!isFoo(kindC[0])) // expected-warning{{null}}
405    return;
406  if(!isFoo(nameC[0])) // no-warning
407    return;
408
409  [kind release];
410  [name release]; // expected-warning{{Incorrect decrement of the reference count}}
411}
412
413// PR 3677 - 'allocWithZone' should be treated as following the Cocoa naming
414//  conventions with respect to 'return'ing ownership.
415@interface PR3677: NSObject @end
416@implementation PR3677
417+ (id)allocWithZone:(NSZone *)inZone {
418  return [super allocWithZone:inZone];  // no-warning
419}
420@end
421
422// PR 3820 - Reason about calls to -dealloc
423void pr3820_DeallocInsteadOfRelease(void)
424{
425  id foo = [[NSString alloc] init]; // no-warning
426  [foo dealloc];
427  // foo is not leaked, since it has been deallocated.
428}
429
430void pr3820_ReleaseAfterDealloc(void)
431{
432  id foo = [[NSString alloc] init];
433  [foo dealloc];
434  [foo release];  // expected-warning{{used after it is release}}
435  // NSInternalInconsistencyException: message sent to deallocated object
436}
437
438void pr3820_DeallocAfterRelease(void)
439{
440  NSLog(@"\n\n[%s]", __FUNCTION__);
441  id foo = [[NSString alloc] init];
442  [foo release];
443  [foo dealloc]; // expected-warning{{used after it is released}}
444  // message sent to released object
445}
446
447// From <rdar://problem/6704930>.  The problem here is that 'length' binds to
448// '($0 - 1)' after '--length', but SimpleConstraintManager doesn't know how to
449// reason about '($0 - 1) > constant'.  As a temporary hack, we drop the value
450// of '($0 - 1)' and conjure a new symbol.
451void rdar6704930(unsigned char *s, unsigned int length) {
452  NSString* name = 0;
453  if (s != 0) {
454    if (length > 0) {
455      while (length > 0) {
456        if (*s == ':') {
457          ++s;
458          --length;
459          name = [[NSString alloc] init]; // no-warning
460          break;
461        }
462        ++s;
463        --length;
464      }
465      if ((length == 0) && (name != 0)) {
466        [name release];
467        name = 0;
468      }
469      if (length == 0) { // no ':' found -> use it all as name
470        name = [[NSString alloc] init]; // no-warning
471      }
472    }
473  }
474
475  if (name != 0) {
476    [name release];
477  }
478}
479
480//===----------------------------------------------------------------------===//
481// <rdar://problem/6833332>
482// One build of the analyzer accidentally stopped tracking the allocated
483// object after the 'retain'.
484//===----------------------------------------------------------------------===//
485
486@interface rdar_6833332 : NSObject <NSApplicationDelegate> {
487    NSWindow *window;
488}
489@property (nonatomic, retain) NSWindow *window;
490@end
491
492@implementation rdar_6833332
493@synthesize window;
494- (void)applicationDidFinishLaunching:(NSNotification *)aNotification {
495 NSMutableDictionary *dict = [[NSMutableDictionary dictionaryWithCapacity:4] retain]; // expected-warning{{leak}}
496
497 [dict setObject:@"foo" forKey:@"bar"];
498
499 NSLog(@"%@", dict);
500}
501- (void)dealloc {
502    [window release];
503    [super dealloc];
504}
505@end
506
507//===----------------------------------------------------------------------===//
508// <rdar://problem/6257780> clang checker fails to catch use-after-release
509//===----------------------------------------------------------------------===//
510                                 
511int rdar_6257780_Case1() {
512  NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
513  NSArray *array = [NSArray array];
514  [array release]; // expected-warning{{Incorrect decrement of the reference count of an object is not owned at this point by the caller}}
515  [pool drain];
516  return 0;
517}
518
519//===----------------------------------------------------------------------===//
520// <rdar://problem/6866843> Checker should understand new/setObject:/release constructs
521//===----------------------------------------------------------------------===//
522
523void rdar_6866843() {
524 NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
525 NSMutableDictionary* dictionary = [[NSMutableDictionary alloc] init];
526 NSArray* array = [[NSArray alloc] init];
527 [dictionary setObject:array forKey:@"key"];
528 [array release];
529 // Using 'array' here should be fine
530 NSLog(@"array = %@\n", array); // no-warning
531 // Now the array is released
532 [dictionary release];
533 [pool drain];
534}
535
536
537//===----------------------------------------------------------------------===//
538// <rdar://problem/6877235> Classes typedef-ed to CF objects should get the same treatment as CF objects
539//===----------------------------------------------------------------------===//
540
541typedef CFTypeRef OtherRef;
542
543@interface RDar6877235 : NSObject {}
544- (CFTypeRef)_copyCFTypeRef;
545- (OtherRef)_copyOtherRef;
546@end
547
548@implementation RDar6877235
549- (CFTypeRef)_copyCFTypeRef {
550  return [[NSString alloc] init]; // no-warning
551}
552- (OtherRef)_copyOtherRef {
553  return [[NSString alloc] init]; // no-warning
554}
555@end
556
557//===----------------------------------------------------------------------===//
558//<rdar://problem/6320065> false positive - init method returns an object owned by caller
559//===----------------------------------------------------------------------===//
560
561@interface RDar6320065 : NSObject {
562  NSString *_foo;
563}
564- (id)initReturningNewClass;
565- (id)initReturningNewClassBad;
566- (id)initReturningNewClassBad2;
567@end
568
569@interface RDar6320065Subclass : RDar6320065
570@end
571
572@implementation RDar6320065
573- (id)initReturningNewClass {
574  [self release];
575  self = [[RDar6320065Subclass alloc] init]; // no-warning
576  return self;
577}
578- (id)initReturningNewClassBad {
579  [self release];
580  [[RDar6320065Subclass alloc] init]; // expected-warning {{leak}}
581  return self;
582}
583- (id)initReturningNewClassBad2 {
584  [self release];
585  self = [[RDar6320065Subclass alloc] init];
586  return [self autorelease]; // expected-warning{{Object with +0 retain counts returned to caller where a +1 (owning) retain count is expected}}
587}
588
589@end
590
591@implementation RDar6320065Subclass
592@end
593
594int RDar6320065_test() {
595  RDar6320065 *test = [[RDar6320065 alloc] init]; // no-warning
596  [test release];
597  return 0;
598}
599
600//===----------------------------------------------------------------------===//
601// <rdar://problem/6859457> [NSData dataWithBytesNoCopy] does not return a retained object
602//===----------------------------------------------------------------------===//
603
604@interface RDar6859457 : NSObject {}
605- (NSString*) NoCopyString;
606- (NSString*) noCopyString;
607@end
608
609@implementation RDar6859457 
610- (NSString*) NoCopyString { return [[NSString alloc] init]; } // no-warning
611- (NSString*) noCopyString { return [[NSString alloc] init]; } // no-warning
612@end
613
614void test_RDar6859457(RDar6859457 *x, void *bytes, NSUInteger dataLength) {
615  [x NoCopyString]; // expected-warning{{leak}}
616  [x noCopyString]; // expected-warning{{leak}}
617  [NSData dataWithBytesNoCopy:bytes length:dataLength];  // no-warning
618  [NSData dataWithBytesNoCopy:bytes length:dataLength freeWhenDone:1]; // no-warning
619}
620
621//===----------------------------------------------------------------------===//
622// Tests of ownership attributes.
623//===----------------------------------------------------------------------===//
624
625typedef NSString* MyStringTy;
626
627@interface TestOwnershipAttr : NSObject
628- (NSString*) returnsAnOwnedString  __attribute__((ns_returns_retained)); // no-warning
629- (NSString*) returnsAnOwnedCFString  __attribute__((cf_returns_retained)); // no-warning
630- (MyStringTy) returnsAnOwnedTypedString __attribute__((ns_returns_retained)); // no-warning
631- (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}}
632@end
633
634static int ownership_attribute_doesnt_go_here __attribute__((ns_returns_retained)); // expected-warning{{'ns_returns_retained' attribute only applies to function or method types}}
635
636void test_attr_1(TestOwnershipAttr *X) {
637  NSString *str = [X returnsAnOwnedString]; // expected-warning{{leak}}
638}
639
640void test_attr_1b(TestOwnershipAttr *X) {
641  NSString *str = [X returnsAnOwnedCFString]; // expected-warning{{leak}}
642}
643
644