1// RUN: %clang_cc1 -analyze -analyzer-checker=core,osx.cocoa.RetainCount -analyzer-store=region -analyzer-max-loop 6 -verify %s
2
3//===----------------------------------------------------------------------===//
4// The following code is reduced using delta-debugging from
5// Foundation.h (Mac OS X).
6//
7// It includes the basic definitions for the test cases below.
8// Not including Foundation.h directly makes this test case both svelte and
9// portable to non-Mac platforms.
10//===----------------------------------------------------------------------===//
11
12typedef unsigned int __darwin_natural_t;
13typedef unsigned long UInt32;
14typedef signed long CFIndex;
15typedef const void * CFTypeRef;
16typedef const struct __CFString * CFStringRef;
17typedef const struct __CFAllocator * CFAllocatorRef;
18extern const CFAllocatorRef kCFAllocatorDefault;
19extern CFTypeRef CFRetain(CFTypeRef cf);
20extern void CFRelease(CFTypeRef cf);
21typedef struct {
22}
23CFArrayCallBacks;
24extern const CFArrayCallBacks kCFTypeArrayCallBacks;
25typedef const struct __CFArray * CFArrayRef;
26typedef struct __CFArray * CFMutableArrayRef;
27extern CFMutableArrayRef CFArrayCreateMutable(CFAllocatorRef allocator, CFIndex capacity, const CFArrayCallBacks *callBacks);
28extern const void *CFArrayGetValueAtIndex(CFArrayRef theArray, CFIndex idx);
29typedef const struct __CFDictionary * CFDictionaryRef;
30typedef UInt32 CFStringEncoding;
31enum {
32kCFStringEncodingMacRoman = 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  };
33extern CFStringRef CFStringCreateWithCString(CFAllocatorRef alloc, const char *cStr, CFStringEncoding encoding);
34typedef double CFTimeInterval;
35typedef CFTimeInterval CFAbsoluteTime;
36typedef const struct __CFDate * CFDateRef;
37extern CFDateRef CFDateCreate(CFAllocatorRef allocator, CFAbsoluteTime at);
38extern CFAbsoluteTime CFDateGetAbsoluteTime(CFDateRef theDate);
39typedef __darwin_natural_t natural_t;
40typedef natural_t mach_port_name_t;
41typedef mach_port_name_t mach_port_t;
42typedef signed char BOOL;
43typedef struct _NSZone NSZone;
44@class NSInvocation, NSMethodSignature, NSCoder, NSString, NSEnumerator;
45@protocol NSObject
46- (BOOL)isEqual:(id)object;
47- (id)retain;
48- (oneway void)release;
49@end  @protocol NSCopying  - (id)copyWithZone:(NSZone *)zone;
50@end  @protocol NSCoding  - (void)encodeWithCoder:(NSCoder *)aCoder;
51@end
52@interface NSObject <NSObject> {}
53- (id)init;
54+ (id)allocWithZone:(NSZone *)zone;
55+ (id)alloc;
56- (void)dealloc;
57@end
58typedef float CGFloat;
59typedef double NSTimeInterval;
60@interface NSDate : NSObject <NSCopying, NSCoding>  - (NSTimeInterval)timeIntervalSinceReferenceDate;
61@end      enum {
62NSObjCNoType = 0,     NSObjCVoidType = 'v',     NSObjCCharType = 'c',     NSObjCShortType = 's',     NSObjCLongType = 'l',     NSObjCLonglongType = 'q',     NSObjCFloatType = 'f',     NSObjCDoubleType = 'd',      NSObjCBoolType = 'B',      NSObjCSelectorType = ':',     NSObjCObjectType = '@',     NSObjCStructType = '{',     NSObjCPointerType = '^',     NSObjCStringType = '*',     NSObjCArrayType = '[',     NSObjCUnionType = '(',     NSObjCBitfield = 'b' }
63__attribute__((deprecated));
64typedef int kern_return_t;
65typedef kern_return_t mach_error_t;
66typedef mach_port_t io_object_t;
67typedef io_object_t io_service_t;
68typedef struct __DASession * DASessionRef;
69extern DASessionRef DASessionCreate( CFAllocatorRef allocator );
70typedef struct __DADisk * DADiskRef;
71extern DADiskRef DADiskCreateFromBSDName( CFAllocatorRef allocator, DASessionRef session, const char * name );
72extern DADiskRef DADiskCreateFromIOMedia( CFAllocatorRef allocator, DASessionRef session, io_service_t media );
73extern CFDictionaryRef DADiskCopyDescription( DADiskRef disk );
74extern DADiskRef DADiskCopyWholeDisk( DADiskRef disk );
75@interface NSAppleEventManager : NSObject {
76}
77@end enum {
78kDAReturnSuccess = 0,     kDAReturnError = (((0x3eU)&0x3f)<<26) | (((0x368)&0xfff)<<14) | 0x01,     kDAReturnBusy = (((0x3eU)&0x3f)<<26) | (((0x368)&0xfff)<<14) | 0x02,     kDAReturnBadArgument = (((0x3eU)&0x3f)<<26) | (((0x368)&0xfff)<<14) | 0x03,     kDAReturnExclusiveAccess = (((0x3eU)&0x3f)<<26) | (((0x368)&0xfff)<<14) | 0x04,     kDAReturnNoResources = (((0x3eU)&0x3f)<<26) | (((0x368)&0xfff)<<14) | 0x05,     kDAReturnNotFound = (((0x3eU)&0x3f)<<26) | (((0x368)&0xfff)<<14) | 0x06,     kDAReturnNotMounted = (((0x3eU)&0x3f)<<26) | (((0x368)&0xfff)<<14) | 0x07,     kDAReturnNotPermitted = (((0x3eU)&0x3f)<<26) | (((0x368)&0xfff)<<14) | 0x08,     kDAReturnNotPrivileged = (((0x3eU)&0x3f)<<26) | (((0x368)&0xfff)<<14) | 0x09,     kDAReturnNotReady = (((0x3eU)&0x3f)<<26) | (((0x368)&0xfff)<<14) | 0x0A,     kDAReturnNotWritable = (((0x3eU)&0x3f)<<26) | (((0x368)&0xfff)<<14) | 0x0B,     kDAReturnUnsupported = (((0x3eU)&0x3f)<<26) | (((0x368)&0xfff)<<14) | 0x0C };
79typedef mach_error_t DAReturn;
80typedef const struct __DADissenter * DADissenterRef;
81extern DADissenterRef DADissenterCreate( CFAllocatorRef allocator, DAReturn status, CFStringRef string );
82@interface NSNumber : NSObject
83- (id)initWithInt:(int)value;
84@end
85typedef unsigned long NSUInteger;
86@interface NSArray : NSObject
87-(id) initWithObjects:(const id *)objects count:(NSUInteger) cnt;
88@end
89
90//===----------------------------------------------------------------------===//
91// Test cases.
92//===----------------------------------------------------------------------===//
93
94// Test to see if we *issue* an error when we store the pointer
95// to a struct.  This differs from basic store.
96
97CFAbsoluteTime CFAbsoluteTimeGetCurrent(void);
98
99struct foo {
100  NSDate* f;
101};
102
103// FIXME: We should be warning about a use-after-free here, but we
104// temporarily "escape" retain counted objects stored to structs very eagerly
105// until we can properly tell whether they have escaped via a return value
106// or not.
107CFAbsoluteTime f4() {
108  struct foo x;
109  
110  CFAbsoluteTime t = CFAbsoluteTimeGetCurrent();
111  CFDateRef date = CFDateCreate(0, t);  
112  [((NSDate*) date) retain];
113  CFRelease(date);
114  CFDateGetAbsoluteTime(date); // no-warning
115  x.f = (NSDate*) date;  
116  [((NSDate*) date) release];
117  // FIXME: the following line should warn.
118  t = CFDateGetAbsoluteTime(date);   // no-warning
119  return t;
120}
121
122// Test that assigning to an self.ivar loses track of an object.
123// This is a temporary hack to reduce false positives.
124@interface Test3 : NSObject {
125  id myObj;
126}
127- (void)test_self_assign_ivar;
128@end
129
130@implementation Test3
131- (void)test_self_assign_ivar {
132  CFAbsoluteTime t = CFAbsoluteTimeGetCurrent();
133  CFDateRef date = CFDateCreate(0, t); // no-warning
134  myObj = (id) date;
135}
136@end
137
138//===------------------------------------------------------------------------------------------===//
139// <rdar://problem/7257223> (also <rdar://problem/7283470>) - False positive due to not invalidating
140//  the reference count of a tracked region that was itself invalidated.
141//===------------------------------------------------------------------------------------------===//
142
143typedef struct __rdar_7257223 { CFDateRef x; } RDar7257223;
144void rdar_7257223_aux(RDar7257223 *p);
145
146CFDateRef rdar7257223_Create(void) {
147  RDar7257223 s;
148  CFAbsoluteTime t = CFAbsoluteTimeGetCurrent();
149  s.x = CFDateCreate(0, t); // no-warning
150  rdar_7257223_aux(&s);
151  return s.x;
152}
153
154CFDateRef rdar7257223_Create_2(void) {
155  RDar7257223 s;
156  CFAbsoluteTime t = CFAbsoluteTimeGetCurrent();
157  s.x = CFDateCreate(0, t); // no-warning
158  return s.x;
159}
160
161void rdar7283470(void) {
162  NSNumber *numbers[] = {
163    [[NSNumber alloc] initWithInt:1], // no-warning
164    [[NSNumber alloc] initWithInt:2], // no-warning
165    [[NSNumber alloc] initWithInt:3], // no-warning
166    [[NSNumber alloc] initWithInt:4], // no-warning
167    [[NSNumber alloc] initWithInt:5]  // no-warning
168  };
169  
170  for (unsigned i = 0 ; i < sizeof(numbers) / sizeof(numbers[0]) ; ++i)
171    [numbers[i] release];
172}
173
174void rdar7283470_positive(void) {
175  NSNumber *numbers[] = {
176    [[NSNumber alloc] initWithInt:1], // expected-warning{{leak}}
177    [[NSNumber alloc] initWithInt:2], // expected-warning{{leak}}
178    [[NSNumber alloc] initWithInt:3], // expected-warning{{leak}}
179    [[NSNumber alloc] initWithInt:4], // expected-warning{{leak}}
180    [[NSNumber alloc] initWithInt:5]  // expected-warning{{leak}} 
181  };
182}
183
184void rdar7283470_2(void) {
185  NSNumber *numbers[] = {
186    [[NSNumber alloc] initWithInt:1], // no-warning
187    [[NSNumber alloc] initWithInt:2], // no-warning
188    [[NSNumber alloc] initWithInt:3], // no-warning
189    [[NSNumber alloc] initWithInt:4], // no-warning
190    [[NSNumber alloc] initWithInt:5]  // no-warning
191  };
192  
193  NSArray *s_numbers =[[NSArray alloc] initWithObjects:&numbers[0] count:sizeof(numbers) / sizeof(numbers[0])];
194  
195  for (unsigned i = 0 ; i < sizeof(numbers) / sizeof(numbers[0]) ; ++i)
196    [numbers[i] release];
197  
198  [s_numbers release];
199}
200
201void rdar7283470_2_positive(void) {
202  NSNumber *numbers[] = {
203    [[NSNumber alloc] initWithInt:1], // no-warning
204    [[NSNumber alloc] initWithInt:2], // no-warning
205    [[NSNumber alloc] initWithInt:3], // no-warning
206    [[NSNumber alloc] initWithInt:4], // no-warning
207    [[NSNumber alloc] initWithInt:5]  // no-warning
208  };
209  
210  NSArray *s_numbers =[[NSArray alloc] initWithObjects: &numbers[0] count:sizeof(numbers) / sizeof(numbers[0])]; // expected-warning{{leak}}
211  
212  for (unsigned i = 0 ; i < sizeof(numbers) / sizeof(numbers[0]) ; ++i)
213    [numbers[i] release];
214}
215
216void pr6699(int x) {
217  CFDateRef values[2];
218  values[0] = values[1] = 0;
219
220  if (x) {
221    CFAbsoluteTime t = CFAbsoluteTimeGetCurrent();
222    values[1] = CFDateCreate(0, t);
223  }
224
225  if (values[1]) {
226    // A bug in RegionStore::RemoveDeadBindings caused 'values[1]' to get prematurely
227    // pruned from the store.
228    CFRelease(values[1]); // no-warning
229  }
230}
231
232// <rdar://problem/8261992> Idempotent operation checker false positive with ObjC ivars
233@interface R8261992 : NSObject {
234  @package int myIvar;
235}
236@end
237
238static void R8261992_ChangeMyIvar(R8261992 *tc) {
239    tc->myIvar = 5;
240}
241
242void R8261992_test(R8261992 *tc) {
243  int temp = tc->myIvar;
244  // The ivar binding for tc->myIvar gets invalidated.
245  R8261992_ChangeMyIvar(tc);
246  tc->myIvar = temp; // no-warning
247  tc = [[R8261992 alloc] init];
248  temp = tc->myIvar; // no-warning
249  // The ivar binding for tc->myIvar gets invalidated.
250  R8261992_ChangeMyIvar(tc);
251  tc->myIvar = temp;
252  [tc release]; // no-warning
253  // did we analyze this?
254  int *p = 0x0;
255  *p = 0xDEADBEEF; // expected-warning{{null}}
256}
257
258