retain-release-region-store.m revision c4d2c9074be6eb2091086eddd6c8f052f3b245c8 
1// RUN: %clang_cc1 -analyze -analyzer-checker=core -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
103CFAbsoluteTime f4() {
104  struct foo x;
105  
106  CFAbsoluteTime t = CFAbsoluteTimeGetCurrent();
107  CFDateRef date = CFDateCreate(0, t);  
108  [((NSDate*) date) retain];
109  CFRelease(date);
110  CFDateGetAbsoluteTime(date); // no-warning
111  x.f = (NSDate*) date;  
112  [((NSDate*) date) release];
113  t = CFDateGetAbsoluteTime(date);   // expected-warning{{Reference-counted object is used after it is released.}}
114  return t;
115}
116
117// Test that assigning to an self.ivar loses track of an object.
118// This is a temporary hack to reduce false positives.
119@interface Test3 : NSObject {
120  id myObj;
121}
122- (void)test_self_assign_ivar;
123@end
124
125@implementation Test3
126- (void)test_self_assign_ivar {
127  CFAbsoluteTime t = CFAbsoluteTimeGetCurrent();
128  CFDateRef date = CFDateCreate(0, t); // no-warning
129  myObj = (id) date;
130}
131@end
132
133//===------------------------------------------------------------------------------------------===//
134// <rdar://problem/7257223> (also <rdar://problem/7283470>) - False positive due to not invalidating
135//  the reference count of a tracked region that was itself invalidated.
136//===------------------------------------------------------------------------------------------===//
137
138typedef struct __rdar_7257223 { CFDateRef x; } RDar7257223;
139void rdar_7257223_aux(RDar7257223 *p);
140
141CFDateRef rdar7257223_Create(void) {
142  RDar7257223 s;
143  CFAbsoluteTime t = CFAbsoluteTimeGetCurrent();
144  s.x = CFDateCreate(0, t); // no-warning
145  rdar_7257223_aux(&s);
146  return s.x;
147}
148
149CFDateRef rdar7257223_Create_2(void) {
150  RDar7257223 s;
151  CFAbsoluteTime t = CFAbsoluteTimeGetCurrent();
152  s.x = CFDateCreate(0, t); // no-warning
153  return s.x;
154}
155
156void rdar7283470(void) {
157  NSNumber *numbers[] = {
158    [[NSNumber alloc] initWithInt:1], // no-warning
159    [[NSNumber alloc] initWithInt:2], // no-warning
160    [[NSNumber alloc] initWithInt:3], // no-warning
161    [[NSNumber alloc] initWithInt:4], // no-warning
162    [[NSNumber alloc] initWithInt:5]  // no-warning
163  };
164  
165  for (unsigned i = 0 ; i < sizeof(numbers) / sizeof(numbers[0]) ; ++i)
166    [numbers[i] release];
167}
168
169void rdar7283470_positive(void) {
170  NSNumber *numbers[] = {
171    [[NSNumber alloc] initWithInt:1], // expected-warning{{leak}}
172    [[NSNumber alloc] initWithInt:2], // expected-warning{{leak}}
173    [[NSNumber alloc] initWithInt:3], // expected-warning{{leak}}
174    [[NSNumber alloc] initWithInt:4], // expected-warning{{leak}}
175    [[NSNumber alloc] initWithInt:5]  // expected-warning{{leak}} 
176  };
177}
178
179void rdar7283470_2(void) {
180  NSNumber *numbers[] = {
181    [[NSNumber alloc] initWithInt:1], // no-warning
182    [[NSNumber alloc] initWithInt:2], // no-warning
183    [[NSNumber alloc] initWithInt:3], // no-warning
184    [[NSNumber alloc] initWithInt:4], // no-warning
185    [[NSNumber alloc] initWithInt:5]  // no-warning
186  };
187  
188  NSArray *s_numbers =[[NSArray alloc] initWithObjects:&numbers[0] count:sizeof(numbers) / sizeof(numbers[0])];
189  
190  for (unsigned i = 0 ; i < sizeof(numbers) / sizeof(numbers[0]) ; ++i)
191    [numbers[i] release];
192  
193  [s_numbers release];
194}
195
196void rdar7283470_2_positive(void) {
197  NSNumber *numbers[] = {
198    [[NSNumber alloc] initWithInt:1], // no-warning
199    [[NSNumber alloc] initWithInt:2], // no-warning
200    [[NSNumber alloc] initWithInt:3], // no-warning
201    [[NSNumber alloc] initWithInt:4], // no-warning
202    [[NSNumber alloc] initWithInt:5]  // no-warning
203  };
204  
205  NSArray *s_numbers =[[NSArray alloc] initWithObjects: &numbers[0] count:sizeof(numbers) / sizeof(numbers[0])]; // expected-warning{{leak}}
206  
207  for (unsigned i = 0 ; i < sizeof(numbers) / sizeof(numbers[0]) ; ++i)
208    [numbers[i] release];
209}
210
211void pr6699(int x) {
212  CFDateRef values[2];
213  values[0] = values[1] = 0;
214
215  if (x) {
216    CFAbsoluteTime t = CFAbsoluteTimeGetCurrent();
217    values[1] = CFDateCreate(0, t);
218  }
219
220  if (values[1]) {
221    // A bug in RegionStore::RemoveDeadBindings caused 'values[1]' to get prematurely
222    // pruned from the store.
223    CFRelease(values[1]); // no-warning
224  }
225}
226
227// <rdar://problem/8261992> Idempotent operation checker false positive with ObjC ivars
228@interface R8261992 : NSObject {
229  @package int myIvar;
230}
231@end
232
233static void R8261992_ChangeMyIvar(R8261992 *tc) {
234    tc->myIvar = 5;
235}
236
237void R8261992_test(R8261992 *tc) {
238  int temp = tc->myIvar;
239  // The ivar binding for tc->myIvar gets invalidated.
240  R8261992_ChangeMyIvar(tc);
241  tc->myIvar = temp; // no-warning
242  tc = [[R8261992 alloc] init];
243  temp = tc->myIvar; // no-warning
244  // The ivar binding for tc->myIvar gets invalidated.
245  R8261992_ChangeMyIvar(tc);
246  tc->myIvar = temp;
247  [tc release]; // no-warning
248  // did we analyze this?
249  int *p = 0x0;
250  *p = 0xDEADBEEF; // expected-warning{{null}}
251}
252
253