1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
| // RUN: %clang_analyze_cc1 -triple %itanium_abi_triple -analyzer-checker=core,osx.cocoa.RetainCount -analyzer-store=region -analyzer-max-loop 6 -verify %s
//===----------------------------------------------------------------------===//
// The following code is reduced using delta-debugging from
// Foundation.h (Mac OS X).
//
// It includes the basic definitions for the test cases below.
// Not including Foundation.h directly makes this test case both svelte and
// portable to non-Mac platforms.
//===----------------------------------------------------------------------===//
typedef unsigned int __darwin_natural_t;
typedef unsigned long UInt32;
typedef signed long CFIndex;
typedef const void * CFTypeRef;
typedef const struct __CFString * CFStringRef;
typedef const struct __CFAllocator * CFAllocatorRef;
extern const CFAllocatorRef kCFAllocatorDefault;
extern CFTypeRef CFRetain(CFTypeRef cf);
extern void CFRelease(CFTypeRef cf);
typedef struct {
}
CFArrayCallBacks;
extern const CFArrayCallBacks kCFTypeArrayCallBacks;
typedef const struct __CFArray * CFArrayRef;
typedef struct __CFArray * CFMutableArrayRef;
extern CFMutableArrayRef CFArrayCreateMutable(CFAllocatorRef allocator, CFIndex capacity, const CFArrayCallBacks *callBacks);
extern const void *CFArrayGetValueAtIndex(CFArrayRef theArray, CFIndex idx);
typedef const struct __CFDictionary * CFDictionaryRef;
typedef UInt32 CFStringEncoding;
enum {
kCFStringEncodingMacRoman = 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 };
extern CFStringRef CFStringCreateWithCString(CFAllocatorRef alloc, const char *cStr, CFStringEncoding encoding);
typedef double CFTimeInterval;
typedef CFTimeInterval CFAbsoluteTime;
typedef const struct __CFDate * CFDateRef;
extern CFDateRef CFDateCreate(CFAllocatorRef allocator, CFAbsoluteTime at);
extern CFAbsoluteTime CFDateGetAbsoluteTime(CFDateRef theDate);
typedef __darwin_natural_t natural_t;
typedef natural_t mach_port_name_t;
typedef mach_port_name_t mach_port_t;
typedef signed char BOOL;
typedef struct _NSZone NSZone;
@class NSInvocation, NSMethodSignature, NSCoder, NSString, NSEnumerator;
@protocol NSObject
- (BOOL)isEqual:(id)object;
- (id)retain;
- (oneway void)release;
@end @protocol NSCopying - (id)copyWithZone:(NSZone *)zone;
@end @protocol NSCoding - (void)encodeWithCoder:(NSCoder *)aCoder;
@end
@interface NSObject <NSObject> {}
- (id)init;
+ (id)allocWithZone:(NSZone *)zone;
+ (id)alloc;
- (void)dealloc;
@end
typedef float CGFloat;
typedef double NSTimeInterval;
@interface NSDate : NSObject <NSCopying, NSCoding> - (NSTimeInterval)timeIntervalSinceReferenceDate;
@end enum {
NSObjCNoType = 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' }
__attribute__((deprecated));
typedef int kern_return_t;
typedef kern_return_t mach_error_t;
typedef mach_port_t io_object_t;
typedef io_object_t io_service_t;
typedef struct __DASession * DASessionRef;
extern DASessionRef DASessionCreate( CFAllocatorRef allocator );
typedef struct __DADisk * DADiskRef;
extern DADiskRef DADiskCreateFromBSDName( CFAllocatorRef allocator, DASessionRef session, const char * name );
extern DADiskRef DADiskCreateFromIOMedia( CFAllocatorRef allocator, DASessionRef session, io_service_t media );
extern CFDictionaryRef DADiskCopyDescription( DADiskRef disk );
extern DADiskRef DADiskCopyWholeDisk( DADiskRef disk );
@interface NSAppleEventManager : NSObject {
}
@end enum {
kDAReturnSuccess = 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 };
typedef mach_error_t DAReturn;
typedef const struct __DADissenter * DADissenterRef;
extern DADissenterRef DADissenterCreate( CFAllocatorRef allocator, DAReturn status, CFStringRef string );
@interface NSNumber : NSObject
- (id)initWithInt:(int)value;
@end
typedef unsigned long NSUInteger;
@interface NSArray : NSObject
-(id) initWithObjects:(const id *)objects count:(NSUInteger) cnt;
@end
//===----------------------------------------------------------------------===//
// Test cases.
//===----------------------------------------------------------------------===//
// Test to see if we *issue* an error when we store the pointer
// to a struct. This differs from basic store.
CFAbsoluteTime CFAbsoluteTimeGetCurrent(void);
struct foo {
NSDate* f;
};
// FIXME: We should be warning about a use-after-free here, but we
// temporarily "escape" retain counted objects stored to structs very eagerly
// until we can properly tell whether they have escaped via a return value
// or not.
CFAbsoluteTime f4() {
struct foo x;
CFAbsoluteTime t = CFAbsoluteTimeGetCurrent();
CFDateRef date = CFDateCreate(0, t);
[((NSDate*) date) retain];
CFRelease(date);
CFDateGetAbsoluteTime(date); // no-warning
x.f = (NSDate*) date;
[((NSDate*) date) release];
// FIXME: the following line should warn.
t = CFDateGetAbsoluteTime(date); // no-warning
return t;
}
// Test that assigning to an self.ivar loses track of an object.
// This is a temporary hack to reduce false positives.
@interface Test3 : NSObject {
id myObj;
}
- (void)test_self_assign_ivar;
@end
@implementation Test3
- (void)test_self_assign_ivar {
CFAbsoluteTime t = CFAbsoluteTimeGetCurrent();
CFDateRef date = CFDateCreate(0, t); // no-warning
myObj = (id) date;
}
@end
//===------------------------------------------------------------------------------------------===//
// <rdar://problem/7257223> (also <rdar://problem/7283470>) - False positive due to not invalidating
// the reference count of a tracked region that was itself invalidated.
//===------------------------------------------------------------------------------------------===//
typedef struct __rdar_7257223 { CFDateRef x; } RDar7257223;
void rdar_7257223_aux(RDar7257223 *p);
CFDateRef rdar7257223_Create(void) {
RDar7257223 s;
CFAbsoluteTime t = CFAbsoluteTimeGetCurrent();
s.x = CFDateCreate(0, t); // no-warning
rdar_7257223_aux(&s);
return s.x;
}
CFDateRef rdar7257223_Create_2(void) {
RDar7257223 s;
CFAbsoluteTime t = CFAbsoluteTimeGetCurrent();
s.x = CFDateCreate(0, t); // no-warning
return s.x;
}
void rdar7283470(void) {
NSNumber *numbers[] = {
[[NSNumber alloc] initWithInt:1], // no-warning
[[NSNumber alloc] initWithInt:2], // no-warning
[[NSNumber alloc] initWithInt:3], // no-warning
[[NSNumber alloc] initWithInt:4], // no-warning
[[NSNumber alloc] initWithInt:5] // no-warning
};
for (unsigned i = 0 ; i < sizeof(numbers) / sizeof(numbers[0]) ; ++i)
[numbers[i] release];
}
void rdar7283470_positive(void) {
NSNumber *numbers[] = {
[[NSNumber alloc] initWithInt:1], // expected-warning{{leak}}
[[NSNumber alloc] initWithInt:2], // expected-warning{{leak}}
[[NSNumber alloc] initWithInt:3], // expected-warning{{leak}}
[[NSNumber alloc] initWithInt:4], // expected-warning{{leak}}
[[NSNumber alloc] initWithInt:5] // expected-warning{{leak}}
};
}
void rdar7283470_2(void) {
NSNumber *numbers[] = {
[[NSNumber alloc] initWithInt:1], // no-warning
[[NSNumber alloc] initWithInt:2], // no-warning
[[NSNumber alloc] initWithInt:3], // no-warning
[[NSNumber alloc] initWithInt:4], // no-warning
[[NSNumber alloc] initWithInt:5] // no-warning
};
NSArray *s_numbers =[[NSArray alloc] initWithObjects:&numbers[0] count:sizeof(numbers) / sizeof(numbers[0])];
for (unsigned i = 0 ; i < sizeof(numbers) / sizeof(numbers[0]) ; ++i)
[numbers[i] release];
[s_numbers release];
}
void rdar7283470_2_positive(void) {
NSNumber *numbers[] = {
[[NSNumber alloc] initWithInt:1], // no-warning
[[NSNumber alloc] initWithInt:2], // no-warning
[[NSNumber alloc] initWithInt:3], // no-warning
[[NSNumber alloc] initWithInt:4], // no-warning
[[NSNumber alloc] initWithInt:5] // no-warning
};
NSArray *s_numbers =[[NSArray alloc] initWithObjects: &numbers[0] count:sizeof(numbers) / sizeof(numbers[0])]; // expected-warning{{leak}}
for (unsigned i = 0 ; i < sizeof(numbers) / sizeof(numbers[0]) ; ++i)
[numbers[i] release];
}
void pr6699(int x) {
CFDateRef values[2];
values[0] = values[1] = 0;
if (x) {
CFAbsoluteTime t = CFAbsoluteTimeGetCurrent();
values[1] = CFDateCreate(0, t);
}
if (values[1]) {
// A bug in RegionStore::RemoveDeadBindings caused 'values[1]' to get prematurely
// pruned from the store.
CFRelease(values[1]); // no-warning
}
}
// <rdar://problem/8261992> Idempotent operation checker false positive with ObjC ivars
@interface R8261992 : NSObject {
@package int myIvar;
}
@end
static void R8261992_ChangeMyIvar(R8261992 *tc) {
tc->myIvar = 5;
}
void R8261992_test(R8261992 *tc) {
int temp = tc->myIvar;
// The ivar binding for tc->myIvar gets invalidated.
R8261992_ChangeMyIvar(tc);
tc->myIvar = temp; // no-warning
tc = [[R8261992 alloc] init];
temp = tc->myIvar; // no-warning
// The ivar binding for tc->myIvar gets invalidated.
R8261992_ChangeMyIvar(tc);
tc->myIvar = temp;
[tc release]; // no-warning
// did we analyze this?
int *p = 0x0;
*p = 0xDEADBEEF; // expected-warning{{null}}
}
|