retain-release.m revision f7a0cf426eddae76e1a71dd2295631a2cf0560af 
1//>>SLICER
2// RUN: clang-cc -analyze -checker-cfref -analyzer-store=basic -verify %s &&
3// RUN: clang-cc -analyze -checker-cfref -analyzer-store=region -verify %s
4
5#if __has_feature(attribute_ns_returns_retained)
6#define NS_RETURNS_RETAINED __attribute__((ns_returns_retained))
7#endif
8#if __has_feature(attribute_cf_returns_retained)
9#define CF_RETURNS_RETAINED __attribute__((cf_returns_retained))
10#endif
11
12//===----------------------------------------------------------------------===//
13// The following code is reduced using delta-debugging from Mac OS X headers:
14//
15// #include <Cocoa/Cocoa.h>
16// #include <CoreFoundation/CoreFoundation.h>
17// #include <DiskArbitration/DiskArbitration.h>
18// #include <QuartzCore/QuartzCore.h>
19// #include <Quartz/Quartz.h>
20// #include <IOKit/IOKitLib.h>
21//
22// It includes the basic definitions for the test cases below.
23//===----------------------------------------------------------------------===//
24
25typedef unsigned int __darwin_natural_t;
26typedef unsigned long uintptr_t;
27typedef unsigned int uint32_t;
28typedef unsigned long long uint64_t;
29typedef unsigned int UInt32;
30typedef signed long CFIndex;
31typedef const void * CFTypeRef;
32typedef const struct __CFString * CFStringRef;
33typedef const struct __CFAllocator * CFAllocatorRef;
34extern const CFAllocatorRef kCFAllocatorDefault;
35extern CFTypeRef CFRetain(CFTypeRef cf);
36extern void CFRelease(CFTypeRef cf);
37typedef struct {
38}
39CFArrayCallBacks;
40extern const CFArrayCallBacks kCFTypeArrayCallBacks;
41typedef const struct __CFArray * CFArrayRef;
42typedef struct __CFArray * CFMutableArrayRef;
43extern CFMutableArrayRef CFArrayCreateMutable(CFAllocatorRef allocator, CFIndex capacity, const CFArrayCallBacks *callBacks);
44extern const void *CFArrayGetValueAtIndex(CFArrayRef theArray, CFIndex idx);
45extern void CFArrayAppendValue(CFMutableArrayRef theArray, const void *value);
46typedef const struct __CFDictionary * CFDictionaryRef;
47typedef struct __CFDictionary * CFMutableDictionaryRef;
48typedef UInt32 CFStringEncoding;
49enum {
50kCFStringEncodingMacRoman = 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  };
51extern CFStringRef CFStringCreateWithCString(CFAllocatorRef alloc, const char *cStr, CFStringEncoding encoding);
52typedef double CFTimeInterval;
53typedef CFTimeInterval CFAbsoluteTime;
54extern CFAbsoluteTime CFAbsoluteTimeGetCurrent(void);
55typedef const struct __CFDate * CFDateRef;
56extern CFDateRef CFDateCreate(CFAllocatorRef allocator, CFAbsoluteTime at);
57extern CFAbsoluteTime CFDateGetAbsoluteTime(CFDateRef theDate);
58typedef __darwin_natural_t natural_t;
59typedef natural_t mach_port_name_t;
60typedef mach_port_name_t mach_port_t;
61typedef int kern_return_t;
62typedef kern_return_t mach_error_t;
63typedef signed char BOOL;
64typedef unsigned long NSUInteger;
65@class NSString, Protocol;
66extern void NSLog(NSString *format, ...) __attribute__((format(__NSString__, 1, 2)));
67typedef struct _NSZone NSZone;
68@class NSInvocation, NSMethodSignature, NSCoder, NSString, NSEnumerator;
69@protocol NSObject  - (BOOL)isEqual:(id)object;
70- (id)retain;
71- (oneway void)release;
72- (id)autorelease;
73@end  @protocol NSCopying  - (id)copyWithZone:(NSZone *)zone;
74@end  @protocol NSMutableCopying  - (id)mutableCopyWithZone:(NSZone *)zone;
75@end  @protocol NSCoding  - (void)encodeWithCoder:(NSCoder *)aCoder;
76@end    @interface NSObject <NSObject> {
77}
78+ (id)allocWithZone:(NSZone *)zone;
79+ (id)alloc;
80- (void)dealloc;
81@end      extern id NSAllocateObject(Class aClass, NSUInteger extraBytes, NSZone *zone);
82typedef struct {
83}
84NSFastEnumerationState;
85@protocol NSFastEnumeration  - (NSUInteger)countByEnumeratingWithState:(NSFastEnumerationState *)state objects:(id *)stackbuf count:(NSUInteger)len;
86@end   @class NSString;
87@interface NSArray : NSObject <NSCopying, NSMutableCopying, NSCoding, NSFastEnumeration>  - (NSUInteger)count;
88@end  @interface NSArray (NSArrayCreation)  + (id)array;
89@end       @interface NSAutoreleasePool : NSObject {
90}
91- (void)drain;
92@end extern NSString * const NSBundleDidLoadNotification;
93typedef double NSTimeInterval;
94@interface NSDate : NSObject <NSCopying, NSCoding>  - (NSTimeInterval)timeIntervalSinceReferenceDate;
95@end            typedef unsigned short unichar;
96@interface NSString : NSObject <NSCopying, NSMutableCopying, NSCoding>    - (NSUInteger)length;
97- ( const char *)UTF8String;
98- (id)initWithUTF8String:(const char *)nullTerminatedCString;
99+ (id)stringWithUTF8String:(const char *)nullTerminatedCString;
100@end       @class NSString, NSData;
101@interface NSData : NSObject <NSCopying, NSMutableCopying, NSCoding>  - (NSUInteger)length;
102+ (id)dataWithBytesNoCopy:(void *)bytes length:(NSUInteger)length;
103+ (id)dataWithBytesNoCopy:(void *)bytes length:(NSUInteger)length freeWhenDone:(BOOL)b;
104@end             @class NSString;
105@interface NSDictionary : NSObject <NSCopying, NSMutableCopying, NSCoding, NSFastEnumeration>  - (NSUInteger)count;
106@end    @interface NSMutableDictionary : NSDictionary  - (void)removeObjectForKey:(id)aKey;
107- (void)setObject:(id)anObject forKey:(id)aKey;
108@end  @interface NSMutableDictionary (NSMutableDictionaryCreation)  + (id)dictionaryWithCapacity:(NSUInteger)numItems;
109@end  typedef double CGFloat;
110struct CGSize {
111};
112typedef struct CGSize CGSize;
113struct CGRect {
114};
115typedef struct CGRect CGRect;
116@protocol NSLocking  - (void)lock;
117- (id)init;
118@end @class NSURLAuthenticationChallenge;
119typedef mach_port_t io_object_t;
120typedef char io_name_t[128];
121typedef io_object_t io_iterator_t;
122typedef io_object_t io_service_t;
123typedef struct IONotificationPort * IONotificationPortRef;
124typedef void (*IOServiceMatchingCallback)(  void * refcon,  io_iterator_t iterator );
125io_service_t IOServiceGetMatchingService(  mach_port_t masterPort,  CFDictionaryRef matching );
126kern_return_t IOServiceGetMatchingServices(  mach_port_t masterPort,  CFDictionaryRef matching,  io_iterator_t * existing );
127kern_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));
128kern_return_t IOServiceAddMatchingNotification(  IONotificationPortRef notifyPort,  const io_name_t notificationType,  CFDictionaryRef matching,         IOServiceMatchingCallback callback,         void * refCon,  io_iterator_t * notification );
129CFMutableDictionaryRef IOServiceMatching(  const char * name );
130CFMutableDictionaryRef IOServiceNameMatching(  const char * name );
131CFMutableDictionaryRef IOBSDNameMatching(  mach_port_t masterPort,  uint32_t options,  const char * bsdName );
132CFMutableDictionaryRef IOOpenFirmwarePathMatching(  mach_port_t masterPort,  uint32_t options,  const char * path );
133CFMutableDictionaryRef IORegistryEntryIDMatching(  uint64_t entryID );
134typedef struct __DASession * DASessionRef;
135extern DASessionRef DASessionCreate( CFAllocatorRef allocator );
136typedef struct __DADisk * DADiskRef;
137extern DADiskRef DADiskCreateFromBSDName( CFAllocatorRef allocator, DASessionRef session, const char * name );
138extern DADiskRef DADiskCreateFromIOMedia( CFAllocatorRef allocator, DASessionRef session, io_service_t media );
139extern CFDictionaryRef DADiskCopyDescription( DADiskRef disk );
140extern DADiskRef DADiskCopyWholeDisk( DADiskRef disk );
141typedef struct CGColorSpace *CGColorSpaceRef;
142typedef struct CGImage *CGImageRef;
143  typedef struct CGLayer *CGLayerRef;
144           @class NSArray, NSError, NSEvent, NSMenu, NSUndoManager, NSWindow;
145@interface NSResponder : NSObject <NSCoding> {
146}
147@end    @protocol NSAnimatablePropertyContainer      - (id)animator;
148@end  extern NSString *NSAnimationTriggerOrderIn ;
149@interface NSView : NSResponder  <NSAnimatablePropertyContainer>  {
150struct __VFlags2 {
151}
152_vFlags2;
153}
154@end   extern NSString * const NSFullScreenModeAllScreens;
155@protocol NSChangeSpelling - (void)changeSpelling:(id)sender;
156@end      @protocol NSIgnoreMisspelledWords - (void)ignoreSpelling:(id)sender;
157@end  @class NSColor, NSFont, NSNotification;
158@interface NSText : NSView <NSChangeSpelling, NSIgnoreMisspelledWords> {
159}
160@end @protocol NSValidatedUserInterfaceItem - (SEL)action;
161@end   @protocol NSUserInterfaceValidations - (BOOL)validateUserInterfaceItem:(id <NSValidatedUserInterfaceItem>)anItem;
162@end @class NSArray, NSError, NSImage, NSView, NSNotificationCenter, NSURL, NSScreen, NSRunningApplication;
163@interface NSApplication : NSResponder <NSUserInterfaceValidations> {
164}
165@end   enum {
166NSTerminateCancel = 0,         NSTerminateNow = 1,         NSTerminateLater = 2 };
167typedef NSUInteger NSApplicationTerminateReply;
168@protocol NSApplicationDelegate <NSObject> @optional        - (NSApplicationTerminateReply)applicationShouldTerminate:(NSApplication *)sender;
169@end    enum {
170}
171_CFlags;
172@interface CIImage : NSObject <NSCoding, NSCopying> {
173}
174typedef int CIFormat;
175@end  enum {
176kDAReturnSuccess = 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 };
177typedef mach_error_t DAReturn;
178typedef const struct __DADissenter * DADissenterRef;
179extern DADissenterRef DADissenterCreate( CFAllocatorRef allocator, DAReturn status, CFStringRef string );
180@interface CIContext: NSObject {
181}
182- (CGImageRef)createCGImage:(CIImage *)im fromRect:(CGRect)r;
183- (CGImageRef)createCGImage:(CIImage *)im fromRect:(CGRect)r     format:(CIFormat)f colorSpace:(CGColorSpaceRef)cs;
184- (CGLayerRef)createCGLayerWithSize:(CGSize)size info:(CFDictionaryRef)d;
185@end @class NSURL;
186@protocol QCCompositionRenderer - (NSDictionary*) attributes;
187@end   @interface QCRenderer : NSObject <QCCompositionRenderer> {
188}
189- (id) createSnapshotImageOfType:(NSString*)type;
190@end  extern NSString* const QCViewDidStartRenderingNotification;
191@interface QCView : NSView <QCCompositionRenderer> {
192}
193- (id) createSnapshotImageOfType:(NSString*)type;
194@end    enum {
195ICEXIFOrientation1 = 1,     ICEXIFOrientation2 = 2,     ICEXIFOrientation3 = 3,     ICEXIFOrientation4 = 4,     ICEXIFOrientation5 = 5,     ICEXIFOrientation6 = 6,     ICEXIFOrientation7 = 7,     ICEXIFOrientation8 = 8, };
196@class ICDevice;
197@protocol ICDeviceDelegate <NSObject>  @required      - (void)didRemoveDevice:(ICDevice*)device;
198@end  @class ICCameraDevice;
199@class ICScannerDevice;
200@protocol ICScannerDeviceDelegate <ICDeviceDelegate>  @optional       - (void)scannerDeviceDidBecomeAvailable:(ICScannerDevice*)scanner;
201@end
202  
203//===----------------------------------------------------------------------===//
204// Test cases.
205//===----------------------------------------------------------------------===//
206
207CFAbsoluteTime f1() {
208  CFAbsoluteTime t = CFAbsoluteTimeGetCurrent();
209  CFDateRef date = CFDateCreate(0, t);
210  CFRetain(date);
211  CFRelease(date);
212  CFDateGetAbsoluteTime(date); // no-warning
213  CFRelease(date);
214  t = CFDateGetAbsoluteTime(date);   // expected-warning{{Reference-counted object is used after it is released.}}
215  return t;
216}
217
218CFAbsoluteTime f2() {
219  CFAbsoluteTime t = CFAbsoluteTimeGetCurrent();
220  CFDateRef date = CFDateCreate(0, t);  
221  [((NSDate*) date) retain];
222  CFRelease(date);
223  CFDateGetAbsoluteTime(date); // no-warning
224  [((NSDate*) date) release];
225  t = CFDateGetAbsoluteTime(date);   // expected-warning{{Reference-counted object is used after it is released.}}
226  return t;
227}
228
229
230NSDate* global_x;
231
232// Test to see if we supresss an error when we store the pointer
233// to a global.
234
235CFAbsoluteTime f3() {
236  CFAbsoluteTime t = CFAbsoluteTimeGetCurrent();
237  CFDateRef date = CFDateCreate(0, t);  
238  [((NSDate*) date) retain];
239  CFRelease(date);
240  CFDateGetAbsoluteTime(date); // no-warning
241  global_x = (NSDate*) date;  
242  [((NSDate*) date) release];
243  t = CFDateGetAbsoluteTime(date);   // no-warning
244  return t;
245}
246
247//---------------------------------------------------------------------------
248// Test case 'f4' differs for region store and basic store.  See
249// retain-release-region-store.m and retain-release-basic-store.m.
250//---------------------------------------------------------------------------
251
252// Test a leak.
253
254CFAbsoluteTime f5(int x) {  
255  CFAbsoluteTime t = CFAbsoluteTimeGetCurrent();
256  CFDateRef date = CFDateCreate(0, t); // expected-warning{{leak}}
257  
258  if (x)
259    CFRelease(date);
260  
261  return t;
262}
263
264// Test a leak involving the return.
265
266CFDateRef f6(int x) {  
267  CFDateRef date = CFDateCreate(0, CFAbsoluteTimeGetCurrent());  // expected-warning{{leak}}
268  CFRetain(date);
269  return date;
270}
271
272// Test a leak involving an overwrite.
273
274CFDateRef f7() {
275  CFDateRef date = CFDateCreate(0, CFAbsoluteTimeGetCurrent());  //expected-warning{{leak}}
276  CFRetain(date);
277  date = CFDateCreate(0, CFAbsoluteTimeGetCurrent());
278  return date;
279}
280
281// Generalization of Create rule.  MyDateCreate returns a CFXXXTypeRef, and
282// has the word create.
283CFDateRef MyDateCreate();
284
285CFDateRef f8() {
286  CFDateRef date = MyDateCreate(); // expected-warning{{leak}}
287  CFRetain(date);  
288  return date;
289}
290
291CFDateRef f9() {
292  CFDateRef date = CFDateCreate(0, CFAbsoluteTimeGetCurrent());
293  int *p = 0;
294  // When allocations fail, CFDateCreate can return null.
295  if (!date) *p = 1; // expected-warning{{null}}
296  return date;
297}
298
299// Handle DiskArbitration API:
300//
301// http://developer.apple.com/DOCUMENTATION/DARWIN/Reference/DiscArbitrationFramework/
302//
303void f10(io_service_t media, DADiskRef d, CFStringRef s) {
304  DADiskRef disk = DADiskCreateFromBSDName(kCFAllocatorDefault, 0, "hello"); // expected-warning{{leak}}
305  if (disk) NSLog(@"ok");
306  
307  disk = DADiskCreateFromIOMedia(kCFAllocatorDefault, 0, media); // expected-warning{{leak}}
308  if (disk) NSLog(@"ok");
309
310  CFDictionaryRef dict = DADiskCopyDescription(d);  // expected-warning{{leak}}
311  if (dict) NSLog(@"ok"); 
312  
313  disk = DADiskCopyWholeDisk(d); // expected-warning{{leak}}
314  if (disk) NSLog(@"ok");
315    
316  DADissenterRef dissenter = DADissenterCreate(kCFAllocatorDefault,   // expected-warning{{leak}}
317                                                kDAReturnSuccess, s);
318  if (dissenter) NSLog(@"ok");
319  
320  DASessionRef session = DASessionCreate(kCFAllocatorDefault);  // expected-warning{{leak}}
321  if (session) NSLog(@"ok");
322}
323
324// Test retain/release checker with CFString and CFMutableArray.
325void f11() {
326  // Create the array.
327  CFMutableArrayRef A = CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks);
328
329  // Create a string.
330  CFStringRef s1 = CFStringCreateWithCString(0, "hello world",
331                                             kCFStringEncodingUTF8);
332
333  // Add the string to the array.
334  CFArrayAppendValue(A, s1);
335  
336  // Decrement the reference count.
337  CFRelease(s1); // no-warning
338  
339  // Get the string.  We don't own it.
340  s1 = (CFStringRef) CFArrayGetValueAtIndex(A, 0);
341  
342  // Release the array.
343  CFRelease(A); // no-warning
344  
345  // Release the string.  This is a bug.
346  CFRelease(s1); // expected-warning{{Incorrect decrement of the reference count}}
347}
348
349// PR 3337: Handle functions declared using typedefs.
350typedef CFTypeRef CREATEFUN();
351CREATEFUN MyCreateFun;
352
353void f12() {
354  CFTypeRef o = MyCreateFun(); // expected-warning {{leak}}
355}
356
357void f13_autorelease() {
358  CFMutableArrayRef A = CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks); // no-warning
359  [(id) A autorelease]; // no-warning
360}
361
362void f13_autorelease_b() {
363  CFMutableArrayRef A = CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks);
364  [(id) A autorelease];
365  [(id) A autorelease]; // expected-warning{{Object sent -autorelease too many times}}
366}
367
368CFMutableArrayRef f13_autorelease_c() {
369  CFMutableArrayRef A = CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks);
370  [(id) A autorelease];
371  [(id) A autorelease]; 
372  return A; // expected-warning{{Object sent -autorelease too many times}}
373}
374
375CFMutableArrayRef f13_autorelease_d() {
376  CFMutableArrayRef A = CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks);
377  [(id) A autorelease];
378  [(id) A autorelease]; 
379  CFMutableArrayRef B = CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks); // expected-warning{{Object sent -autorelease too many times}}
380  CFRelease(B); // no-warning
381  while (1) {}
382}
383
384
385// This case exercises the logic where the leak site is the same as the allocation site.
386void f14_leakimmediately() {
387  CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks); // expected-warning{{leak}}
388}
389
390// Test that we track an allocated object beyond the point where the *name*
391// of the variable storing the reference is no longer live.
392void f15() {
393  // Create the array.
394  CFMutableArrayRef A = CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks);
395  CFMutableArrayRef *B = &A;
396  // At this point, the name 'A' is no longer live.
397  CFRelease(*B);  // no-warning
398}
399
400// Test when we pass NULL to CFRetain/CFRelease.
401void f16(int x, CFTypeRef p) {
402  if (p)
403    return;
404
405  if (x) {
406    CFRelease(p); // expected-warning{{Null pointer argument in call to CFRelease}}
407  }
408  else {
409    CFRetain(p); // expected-warning{{Null pointer argument in call to CFRetain}}
410  }
411}
412
413// Test basic tracking of ivars associated with 'self'.  For the retain/release
414// checker we currently do not want to flag leaks associated with stores
415// of tracked objects to ivars.
416@interface SelfIvarTest : NSObject {
417  id myObj;
418}
419- (void)test_self_tracking;
420@end
421
422@implementation SelfIvarTest
423- (void)test_self_tracking {
424  myObj = (id) CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks); // no-warning
425}
426@end
427
428// Test return of non-owned objects in contexts where an owned object
429// is expected.
430@interface TestReturnNotOwnedWhenExpectedOwned
431- (NSString*)newString;
432@end
433
434@implementation TestReturnNotOwnedWhenExpectedOwned
435- (NSString*)newString {
436  NSString *s = [NSString stringWithUTF8String:"hello"];
437  return s; // expected-warning{{Object with +0 retain counts returned to caller where a +1 (owning) retain count is expected}}
438}
439@end
440
441// <rdar://problem/6659160>
442int isFoo(char c);
443
444static void rdar_6659160(char *inkind, char *inname)
445{
446  // We currently expect that [NSObject alloc] cannot fail.  This
447  // will be a toggled flag in the future.  It can indeed return null, but
448  // Cocoa programmers generally aren't expected to reason about out-of-memory
449  // conditions.
450  NSString *kind = [[NSString alloc] initWithUTF8String:inkind];  // expected-warning{{leak}}
451  
452  // We do allow stringWithUTF8String to fail.  This isn't really correct, as
453  // far as returning 0.  In most error conditions it will throw an exception.
454  // If allocation fails it could return 0, but again this
455  // isn't expected.
456  NSString *name = [NSString stringWithUTF8String:inname];
457  if(!name)
458    return;
459
460  const char *kindC = 0;
461  const char *nameC = 0;
462  
463  // In both cases, we cannot reach a point down below where we
464  // dereference kindC or nameC with either being null.  This is because
465  // we assume that [NSObject alloc] doesn't fail and that we have the guard
466  // up above.
467  
468  if(kind)
469    kindC = [kind UTF8String];
470  if(name)
471    nameC = [name UTF8String];
472  if(!isFoo(kindC[0])) // expected-warning{{null}}
473    return;
474  if(!isFoo(nameC[0])) // no-warning
475    return;
476
477  [kind release];
478  [name release]; // expected-warning{{Incorrect decrement of the reference count}}
479}
480
481// PR 3677 - 'allocWithZone' should be treated as following the Cocoa naming
482//  conventions with respect to 'return'ing ownership.
483@interface PR3677: NSObject @end
484@implementation PR3677
485+ (id)allocWithZone:(NSZone *)inZone {
486  return [super allocWithZone:inZone];  // no-warning
487}
488@end
489
490// PR 3820 - Reason about calls to -dealloc
491void pr3820_DeallocInsteadOfRelease(void)
492{
493  id foo = [[NSString alloc] init]; // no-warning
494  [foo dealloc];
495  // foo is not leaked, since it has been deallocated.
496}
497
498void pr3820_ReleaseAfterDealloc(void)
499{
500  id foo = [[NSString alloc] init];
501  [foo dealloc];
502  [foo release];  // expected-warning{{used after it is release}}
503  // NSInternalInconsistencyException: message sent to deallocated object
504}
505
506void pr3820_DeallocAfterRelease(void)
507{
508  NSLog(@"\n\n[%s]", __FUNCTION__);
509  id foo = [[NSString alloc] init];
510  [foo release];
511  [foo dealloc]; // expected-warning{{used after it is released}}
512  // message sent to released object
513}
514
515// From <rdar://problem/6704930>.  The problem here is that 'length' binds to
516// '($0 - 1)' after '--length', but SimpleConstraintManager doesn't know how to
517// reason about '($0 - 1) > constant'.  As a temporary hack, we drop the value
518// of '($0 - 1)' and conjure a new symbol.
519void rdar6704930(unsigned char *s, unsigned int length) {
520  NSString* name = 0;
521  if (s != 0) {
522    if (length > 0) {
523      while (length > 0) {
524        if (*s == ':') {
525          ++s;
526          --length;
527          name = [[NSString alloc] init]; // no-warning
528          break;
529        }
530        ++s;
531        --length;
532      }
533      if ((length == 0) && (name != 0)) {
534        [name release];
535        name = 0;
536      }
537      if (length == 0) { // no ':' found -> use it all as name
538        name = [[NSString alloc] init]; // no-warning
539      }
540    }
541  }
542
543  if (name != 0) {
544    [name release];
545  }
546}
547
548//===----------------------------------------------------------------------===//
549// <rdar://problem/6833332>
550// One build of the analyzer accidentally stopped tracking the allocated
551// object after the 'retain'.
552//===----------------------------------------------------------------------===//
553
554@interface rdar_6833332 : NSObject <NSApplicationDelegate> {
555    NSWindow *window;
556}
557@property (nonatomic, retain) NSWindow *window;
558@end
559
560@implementation rdar_6833332
561@synthesize window;
562- (void)applicationDidFinishLaunching:(NSNotification *)aNotification {
563 NSMutableDictionary *dict = [[NSMutableDictionary dictionaryWithCapacity:4] retain]; // expected-warning{{leak}}
564
565 [dict setObject:@"foo" forKey:@"bar"];
566
567 NSLog(@"%@", dict);
568}
569- (void)dealloc {
570    [window release];
571    [super dealloc];
572}
573@end
574
575//===----------------------------------------------------------------------===//
576// <rdar://problem/6257780> clang checker fails to catch use-after-release
577//===----------------------------------------------------------------------===//
578                                 
579int rdar_6257780_Case1() {
580  NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
581  NSArray *array = [NSArray array];
582  [array release]; // expected-warning{{Incorrect decrement of the reference count of an object is not owned at this point by the caller}}
583  [pool drain];
584  return 0;
585}
586
587//===----------------------------------------------------------------------===//
588// <rdar://problem/6866843> Checker should understand new/setObject:/release constructs
589//===----------------------------------------------------------------------===//
590
591void rdar_6866843() {
592 NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
593 NSMutableDictionary* dictionary = [[NSMutableDictionary alloc] init];
594 NSArray* array = [[NSArray alloc] init];
595 [dictionary setObject:array forKey:@"key"];
596 [array release];
597 // Using 'array' here should be fine
598 NSLog(@"array = %@\n", array); // no-warning
599 // Now the array is released
600 [dictionary release];
601 [pool drain];
602}
603
604
605//===----------------------------------------------------------------------===//
606// <rdar://problem/6877235> Classes typedef-ed to CF objects should get the same treatment as CF objects
607//===----------------------------------------------------------------------===//
608
609typedef CFTypeRef OtherRef;
610
611@interface RDar6877235 : NSObject {}
612- (CFTypeRef)_copyCFTypeRef;
613- (OtherRef)_copyOtherRef;
614@end
615
616@implementation RDar6877235
617- (CFTypeRef)_copyCFTypeRef {
618  return [[NSString alloc] init]; // no-warning
619}
620- (OtherRef)_copyOtherRef {
621  return [[NSString alloc] init]; // no-warning
622}
623@end
624
625//===----------------------------------------------------------------------===//
626//<rdar://problem/6320065> false positive - init method returns an object owned by caller
627//===----------------------------------------------------------------------===//
628
629@interface RDar6320065 : NSObject {
630  NSString *_foo;
631}
632- (id)initReturningNewClass;
633- (id)initReturningNewClassBad;
634- (id)initReturningNewClassBad2;
635@end
636
637@interface RDar6320065Subclass : RDar6320065
638@end
639
640@implementation RDar6320065
641- (id)initReturningNewClass {
642  [self release];
643  self = [[RDar6320065Subclass alloc] init]; // no-warning
644  return self;
645}
646- (id)initReturningNewClassBad {
647  [self release];
648  [[RDar6320065Subclass alloc] init]; // expected-warning {{leak}}
649  return self;
650}
651- (id)initReturningNewClassBad2 {
652  [self release];
653  self = [[RDar6320065Subclass alloc] init];
654  return [self autorelease]; // expected-warning{{Object with +0 retain counts returned to caller where a +1 (owning) retain count is expected}}
655}
656
657@end
658
659@implementation RDar6320065Subclass
660@end
661
662int RDar6320065_test() {
663  RDar6320065 *test = [[RDar6320065 alloc] init]; // no-warning
664  [test release];
665  return 0;
666}
667
668//===----------------------------------------------------------------------===//
669// <rdar://problem/6859457> [NSData dataWithBytesNoCopy] does not return a retained object
670//===----------------------------------------------------------------------===//
671
672@interface RDar6859457 : NSObject {}
673- (NSString*) NoCopyString;
674- (NSString*) noCopyString;
675@end
676
677@implementation RDar6859457 
678- (NSString*) NoCopyString { return [[NSString alloc] init]; } // no-warning
679- (NSString*) noCopyString { return [[NSString alloc] init]; } // no-warning
680@end
681
682void test_RDar6859457(RDar6859457 *x, void *bytes, NSUInteger dataLength) {
683  [x NoCopyString]; // expected-warning{{leak}}
684  [x noCopyString]; // expected-warning{{leak}}
685  [NSData dataWithBytesNoCopy:bytes length:dataLength];  // no-warning
686  [NSData dataWithBytesNoCopy:bytes length:dataLength freeWhenDone:1]; // no-warning
687}
688
689//===----------------------------------------------------------------------===//
690// PR 4230 - an autorelease pool is not necessarily leaked during a premature
691//  return
692//===----------------------------------------------------------------------===//
693
694static void PR4230(void)
695{
696  NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; // no-warning
697  NSString *object = [[[NSString alloc] init] autorelease]; // no-warning
698  return;
699}
700
701//===----------------------------------------------------------------------===//
702// Method name that has a null IdentifierInfo* for its first selector slot.
703// This test just makes sure that we handle it.
704//===----------------------------------------------------------------------===//
705
706@interface TestNullIdentifier
707@end
708
709@implementation TestNullIdentifier
710+ (id):(int)x, ... {
711  return [[NSString alloc] init]; // expected-warning{{leak}}
712}
713@end
714
715//===----------------------------------------------------------------------===//
716// <rdar://problem/6893565> don't flag leaks for return types that cannot be 
717//                          determined to be CF types
718//===----------------------------------------------------------------------===//
719
720// We don't know if 'struct s6893565' represents a Core Foundation type, so
721// we shouldn't emit an error here.
722typedef struct s6893565* TD6893565;
723
724@interface RDar6893565 {}
725-(TD6893565)newThing;
726@end
727
728@implementation RDar6893565
729-(TD6893565)newThing {  
730  return (TD6893565) [[NSString alloc] init]; // no-warning
731}
732@end
733
734//===----------------------------------------------------------------------===//
735// <rdar://problem/6902710> clang: false positives w/QC and CoreImage methods
736//===----------------------------------------------------------------------===//
737
738void rdar6902710(QCView *view, QCRenderer *renderer, CIContext *context,
739                 NSString *str, CIImage *img, CGRect rect,
740                 CIFormat form, CGColorSpaceRef cs) {
741  [view createSnapshotImageOfType:str]; // expected-warning{{leak}}
742  [renderer createSnapshotImageOfType:str]; // expected-warning{{leak}}
743  [context createCGImage:img fromRect:rect]; // expected-warning{{leak}}
744  [context createCGImage:img fromRect:rect format:form colorSpace:cs]; // expected-warning{{leak}}
745}
746
747//===----------------------------------------------------------------------===//
748// <rdar://problem/6945561> -[CIContext createCGLayerWithSize:info:]
749//                           misinterpreted by clang scan-build
750//===----------------------------------------------------------------------===//
751
752void rdar6945561(CIContext *context, CGSize size, CFDictionaryRef d) {
753  [context createCGLayerWithSize:size info:d]; // expected-warning{{leak}}
754}
755
756//===----------------------------------------------------------------------===//
757// <rdar://problem/6961230> add knowledge of IOKit functions to retain/release 
758//                          checker
759//===----------------------------------------------------------------------===//
760
761void IOBSDNameMatching_wrapper(mach_port_t masterPort, uint32_t options,  const char * bsdName) {  
762  IOBSDNameMatching(masterPort, options, bsdName); // expected-warning{{leak}}
763}
764
765void IOServiceMatching_wrapper(const char * name) {
766  IOServiceMatching(name); // expected-warning{{leak}}
767}
768
769void IOServiceNameMatching_wrapper(const char * name) {
770  IOServiceNameMatching(name); // expected-warning{{leak}}
771}
772
773CF_RETURNS_RETAINED CFDictionaryRef CreateDict();
774
775void IOServiceAddNotification_wrapper(mach_port_t masterPort, const io_name_t notificationType,
776  mach_port_t wakePort, uintptr_t reference, io_iterator_t * notification ) {
777
778  CFDictionaryRef matching = CreateDict();
779  CFRelease(matching);
780  IOServiceAddNotification(masterPort, notificationType, matching, // expected-warning{{used after it is released}} expected-warning{{deprecated}}
781                           wakePort, reference, notification);
782}
783
784void IORegistryEntryIDMatching_wrapper(uint64_t entryID ) {
785  IORegistryEntryIDMatching(entryID); // expected-warning{{leak}}
786}
787
788void IOOpenFirmwarePathMatching_wrapper(mach_port_t masterPort, uint32_t options,
789                                        const char * path) {
790  IOOpenFirmwarePathMatching(masterPort, options, path); // expected-warning{{leak}}
791}
792
793void IOServiceGetMatchingService_wrapper(mach_port_t masterPort) {
794  CFDictionaryRef matching = CreateDict();
795  IOServiceGetMatchingService(masterPort, matching);
796  CFRelease(matching); // expected-warning{{used after it is released}}
797}
798
799void IOServiceGetMatchingServices_wrapper(mach_port_t masterPort, io_iterator_t *existing) {
800  CFDictionaryRef matching = CreateDict();
801  IOServiceGetMatchingServices(masterPort, matching, existing);
802  CFRelease(matching); // expected-warning{{used after it is released}}
803}
804
805void IOServiceAddMatchingNotification_wrapper(IONotificationPortRef notifyPort, const io_name_t notificationType, 
806  IOServiceMatchingCallback callback, void * refCon, io_iterator_t * notification) {
807    
808  CFDictionaryRef matching = CreateDict();
809  IOServiceAddMatchingNotification(notifyPort, notificationType, matching, callback, refCon, notification);
810  CFRelease(matching); // expected-warning{{used after it is released}}
811}
812
813//===----------------------------------------------------------------------===//
814// Tests of ownership attributes.
815//===----------------------------------------------------------------------===//
816
817typedef NSString* MyStringTy;
818
819@protocol FooP;
820
821@interface TestOwnershipAttr : NSObject
822- (NSString*) returnsAnOwnedString  NS_RETURNS_RETAINED; // no-warning
823- (NSString*) returnsAnOwnedCFString  CF_RETURNS_RETAINED; // no-warning
824- (MyStringTy) returnsAnOwnedTypedString NS_RETURNS_RETAINED; // no-warning
825- (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}}
826- (id<FooP>) returnsOwnedProt NS_RETURNS_RETAINED; // no-warning
827@end
828
829static int ownership_attribute_doesnt_go_here NS_RETURNS_RETAINED; // expected-warning{{'ns_returns_retained' attribute only applies to function or method types}}
830
831void test_attr_1(TestOwnershipAttr *X) {
832  NSString *str = [X returnsAnOwnedString]; // expected-warning{{leak}}
833}
834
835void test_attr_1b(TestOwnershipAttr *X) {
836  NSString *str = [X returnsAnOwnedCFString]; // expected-warning{{leak}}
837}
838
839@interface MyClassTestCFAttr : NSObject {}
840- (NSDate*) returnsCFRetained CF_RETURNS_RETAINED;
841- (CFDateRef) returnsCFRetainedAsCF CF_RETURNS_RETAINED;
842- (NSDate*) alsoReturnsRetained;
843- (CFDateRef) alsoReturnsRetainedAsCF;
844- (NSDate*) returnsNSRetained NS_RETURNS_RETAINED;
845@end
846
847CF_RETURNS_RETAINED
848CFDateRef returnsRetainedCFDate()  {
849  return CFDateCreate(0, CFAbsoluteTimeGetCurrent());
850}
851
852@implementation MyClassTestCFAttr
853- (NSDate*) returnsCFRetained {
854  return (NSDate*) returnsRetainedCFDate(); // No leak.
855}
856
857- (CFDateRef) returnsCFRetainedAsCF {
858  return returnsRetainedCFDate(); // No leak.
859}
860
861
862- (NSDate*) alsoReturnsRetained {
863  return (NSDate*) returnsRetainedCFDate(); // expected-warning{{leak}}
864}
865
866- (CFDateRef) alsoReturnsRetainedAsCF {
867  return returnsRetainedCFDate(); // expected-warning{{leak}}
868}
869
870
871- (NSDate*) returnsNSRetained {
872  return (NSDate*) returnsRetainedCFDate(); // no-warning
873}
874@end
875
876
877
878