NSString.m revision 4489fe10fa073eb326e2c8906db170f009050911
1// RUN: clang -checker-cfref -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 directly including Foundation.h directly makes this test case 9// both svelte and portable to non-Mac platforms. 10//===----------------------------------------------------------------------===// 11 12typedef const void * CFTypeRef; 13typedef const struct __CFString * CFStringRef; 14typedef const struct __CFAllocator * CFAllocatorRef; 15extern const CFAllocatorRef kCFAllocatorDefault; 16extern CFTypeRef CFRetain(CFTypeRef cf); 17typedef const struct __CFDictionary * CFDictionaryRef; 18extern CFStringRef CFStringCreateWithFormat(CFAllocatorRef alloc, CFDictionaryRef formatOptions, CFStringRef format, ...); 19typedef signed char BOOL; 20typedef int NSInteger; 21typedef unsigned int NSUInteger; 22@class NSString, Protocol; 23extern void NSLog(NSString *format, ...) __attribute__((format(__NSString__, 1, 2))); 24typedef NSInteger NSComparisonResult; 25typedef struct _NSZone NSZone; 26@class NSInvocation, NSMethodSignature, NSCoder, NSString, NSEnumerator; 27@protocol NSObject 28- (BOOL)isEqual:(id)object; 29- (oneway void)release; 30@end 31@protocol NSCopying 32- (id)copyWithZone:(NSZone *)zone; 33@end 34@protocol NSMutableCopying 35- (id)mutableCopyWithZone:(NSZone *)zone; 36@end 37@protocol NSCoding 38- (void)encodeWithCoder:(NSCoder *)aCoder; 39@end 40@interface NSObject <NSObject> {} 41- (id)init; 42+ (id)alloc; 43@end 44extern id NSAllocateObject(Class aClass, NSUInteger extraBytes, NSZone *zone); 45typedef struct {} NSFastEnumerationState; 46@protocol NSFastEnumeration 47- (NSUInteger)countByEnumeratingWithState:(NSFastEnumerationState *)state objects:(id *)stackbuf count:(NSUInteger)len; 48@end 49@class NSString; 50typedef struct _NSRange {} NSRange; 51@interface NSArray : NSObject <NSCopying, NSMutableCopying, NSCoding, NSFastEnumeration> 52- (NSUInteger)count; 53@end 54@interface NSMutableArray : NSArray 55- (void)addObject:(id)anObject; 56- (id)initWithCapacity:(NSUInteger)numItems; 57@end 58typedef unsigned short unichar; 59@class NSData, NSArray, NSDictionary, NSCharacterSet, NSData, NSURL, NSError, NSLocale; 60typedef NSUInteger NSStringCompareOptions; 61@interface NSString : NSObject <NSCopying, NSMutableCopying, NSCoding> - (NSUInteger)length; 62- (NSComparisonResult)compare:(NSString *)string; 63- (NSComparisonResult)compare:(NSString *)string options:(NSStringCompareOptions)mask; 64- (NSComparisonResult)compare:(NSString *)string options:(NSStringCompareOptions)mask range:(NSRange)compareRange; 65- (NSComparisonResult)compare:(NSString *)string options:(NSStringCompareOptions)mask range:(NSRange)compareRange locale:(id)locale; 66- (NSComparisonResult)caseInsensitiveCompare:(NSString *)string; 67- (NSArray *)componentsSeparatedByCharactersInSet:(NSCharacterSet *)separator; 68@end 69@interface NSSimpleCString : NSString {} @end 70@interface NSConstantString : NSSimpleCString @end 71extern void *_NSConstantStringClassReference; 72 73//===----------------------------------------------------------------------===// 74// Test cases. 75//===----------------------------------------------------------------------===// 76 77NSComparisonResult f1(NSString* s) { 78 NSString *aString = 0; 79 return [s compare:aString]; // expected-warning {{Argument to 'NSString' method 'compare:' cannot be nil.}} 80} 81 82NSComparisonResult f2(NSString* s) { 83 NSString *aString = 0; 84 return [s caseInsensitiveCompare:aString]; // expected-warning {{Argument to 'NSString' method 'caseInsensitiveCompare:' cannot be nil.}} 85} 86 87NSComparisonResult f3(NSString* s, NSStringCompareOptions op) { 88 NSString *aString = 0; 89 return [s compare:aString options:op]; // expected-warning {{Argument to 'NSString' method 'compare:options:' cannot be nil.}} 90} 91 92NSComparisonResult f4(NSString* s, NSStringCompareOptions op, NSRange R) { 93 NSString *aString = 0; 94 return [s compare:aString options:op range:R]; // expected-warning {{Argument to 'NSString' method 'compare:options:range:' cannot be nil.}} 95} 96 97NSComparisonResult f5(NSString* s, NSStringCompareOptions op, NSRange R) { 98 NSString *aString = 0; 99 return [s compare:aString options:op range:R locale:0]; // expected-warning {{Argument to 'NSString' method 'compare:options:range:locale:' cannot be nil.}} 100} 101 102NSArray *f6(NSString* s) { 103 return [s componentsSeparatedByCharactersInSet:0]; // expected-warning {{Argument to 'NSString' method 'componentsSeparatedByCharactersInSet:' cannot be nil.}} 104} 105 106NSString* f7(NSString* s1, NSString* s2, NSString* s3) { 107 108 NSString* s4 = (NSString*) 109 CFStringCreateWithFormat(kCFAllocatorDefault, 0, 110 (CFStringRef) __builtin___CFStringMakeConstantString("%@ %@ (%@)"), 111 s1, s2, s3); 112 113 CFRetain(s4); 114 return s4; // expected-warning{{leak}} 115} 116 117NSMutableArray* f8() { 118 119 NSString* s = [[NSString alloc] init]; 120 NSMutableArray* a = [[NSMutableArray alloc] initWithCapacity:2]; 121 [a addObject:s]; 122 [s release]; // no-warning 123 return a; 124} 125 126void f9() { 127 128 NSString* s = [[NSString alloc] init]; 129 NSString* q = s; 130 [s release]; 131 [q release]; // expected-warning {{used after it is released}} 132} 133 134NSString* f10() { 135 136 static NSString* s = 0; 137 138 if (!s) s = [[NSString alloc] init]; 139 140 return s; // no-warning 141} 142 143@interface C1 : NSObject {} 144- (NSString*) getShared; 145+ (C1*) sharedInstance; 146@end 147@implementation C1 : NSObject {} 148- (NSString*) getShared { 149 static NSString* s = 0; 150 if (!s) s = [[NSString alloc] init]; 151 return s; // no-warning 152} 153+ (C1 *)sharedInstance { 154 static C1 *sharedInstance = 0; 155 if (!sharedInstance) { 156 sharedInstance = [[C1 alloc] init]; 157 } 158 return sharedInstance; // no-warning 159} 160@end 161 162@interface SharedClass : NSObject 163+ (id)sharedInstance; 164@end 165@implementation SharedClass 166 167- (id)_init { 168 if ((self = [super init])) { 169 NSLog(@"Bar"); 170 } 171 return self; 172} 173 174+ (id)sharedInstance { 175 static SharedClass *_sharedInstance = 0; 176 if (!_sharedInstance) { 177 _sharedInstance = [[SharedClass alloc] _init]; 178 } 179 return _sharedInstance; // no-warning 180} 181@end 182