// RUN: %clang_analyze_cc1 -triple i386-apple-darwin10 -analyzer-checker=core,osx.cocoa.NilArg,osx.cocoa.RetainCount,alpha.core -verify -Wno-objc-root-class %s
// RUN: %clang_analyze_cc1 -triple i386-apple-darwin10 -analyzer-checker=core,osx.cocoa.NilArg,osx.cocoa.RetainCount,alpha.core -analyzer-config mode=shallow -verify -Wno-objc-root-class %s
// RUN: %clang_analyze_cc1 -DTEST_64 -triple x86_64-apple-darwin10 -analyzer-checker=core,osx.cocoa.NilArg,osx.cocoa.RetainCount,alpha.core -verify -Wno-objc-root-class %s
// RUN: %clang_analyze_cc1 -DOSATOMIC_USE_INLINED -triple i386-apple-darwin10 -analyzer-checker=core,osx.cocoa.NilArg,osx.cocoa.RetainCount,alpha.core -verify -Wno-objc-root-class %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 directly including Foundation.h directly makes this test case
// both svelte and portable to non-Mac platforms.
//===----------------------------------------------------------------------===//
#ifdef TEST_64
typedef long long int64_t;
_Bool OSAtomicCompareAndSwap64Barrier( int64_t __oldValue, int64_t __newValue, volatile int64_t *__theValue );
#define COMPARE_SWAP_BARRIER OSAtomicCompareAndSwap64Barrier
typedef int64_t intptr_t;
#else
typedef int int32_t;
_Bool OSAtomicCompareAndSwap32Barrier( int32_t __oldValue, int32_t __newValue, volatile int32_t *__theValue );
#define COMPARE_SWAP_BARRIER OSAtomicCompareAndSwap32Barrier
typedef int32_t intptr_t;
#endif
typedef const void * CFTypeRef;
typedef const struct __CFString * CFStringRef;
typedef const struct __CFAllocator * CFAllocatorRef;
extern const CFAllocatorRef kCFAllocatorDefault;
extern CFTypeRef CFRetain(CFTypeRef cf);
void CFRelease(CFTypeRef cf);
typedef const struct __CFDictionary * CFDictionaryRef;
const void *CFDictionaryGetValue(CFDictionaryRef theDict, const void *key);
extern CFStringRef CFStringCreateWithFormat(CFAllocatorRef alloc, CFDictionaryRef formatOptions, CFStringRef format, ...);
typedef signed char BOOL;
typedef int NSInteger;
typedef unsigned int NSUInteger;
@class NSString, Protocol;
extern void NSLog(NSString *format, ...) __attribute__((format(__NSString__, 1, 2)));
typedef NSInteger NSComparisonResult;
typedef struct _NSZone NSZone;
@class NSInvocation, NSMethodSignature, NSCoder, NSString, NSEnumerator;
@protocol NSObject
- (BOOL)isEqual:(id)object;
- (oneway void)release;
- (id)retain;
- (id)autorelease;
@end
@protocol NSCopying
- (id)copyWithZone:(NSZone *)zone;
@end
@protocol NSMutableCopying
- (id)mutableCopyWithZone:(NSZone *)zone;
@end
@protocol NSCoding
- (void)encodeWithCoder:(NSCoder *)aCoder;
@end
@interface NSObject <NSObject> {}
- (id)init;
+ (id)alloc;
@end
extern id NSAllocateObject(Class aClass, NSUInteger extraBytes, NSZone *zone);
typedef struct {} NSFastEnumerationState;
@protocol NSFastEnumeration
- (NSUInteger)countByEnumeratingWithState:(NSFastEnumerationState *)state objects:(id *)stackbuf count:(NSUInteger)len;
@end
@class NSString;
typedef struct _NSRange {} NSRange;
@interface NSArray : NSObject <NSCopying, NSMutableCopying, NSCoding, NSFastEnumeration>
- (NSUInteger)count;
@end
@interface NSMutableArray : NSArray
- (void)addObject:(id)anObject;
- (id)initWithCapacity:(NSUInteger)numItems;
@end
typedef unsigned short unichar;
@class NSData, NSArray, NSDictionary, NSCharacterSet, NSData, NSURL, NSError, NSLocale;
typedef NSUInteger NSStringCompareOptions;
@interface NSString : NSObject <NSCopying, NSMutableCopying, NSCoding> - (NSUInteger)length;
- (NSComparisonResult)compare:(NSString *)string;
- (NSComparisonResult)compare:(NSString *)string options:(NSStringCompareOptions)mask;
- (NSComparisonResult)compare:(NSString *)string options:(NSStringCompareOptions)mask range:(NSRange)compareRange;
- (NSComparisonResult)compare:(NSString *)string options:(NSStringCompareOptions)mask range:(NSRange)compareRange locale:(id)locale;
- (NSComparisonResult)caseInsensitiveCompare:(NSString *)string;
- (NSArray *)componentsSeparatedByCharactersInSet:(NSCharacterSet *)separator;
+ (id)stringWithFormat:(NSString *)format, ... __attribute__((format(__NSString__, 1, 2)));
@end
@interface NSSimpleCString : NSString {} @end
@interface NSConstantString : NSSimpleCString @end
extern void *_NSConstantStringClassReference;
//===----------------------------------------------------------------------===//
// Test cases.
//===----------------------------------------------------------------------===//
NSComparisonResult f1(NSString* s) {
NSString *aString = 0;
return [s compare:aString]; // expected-warning {{Argument to 'NSString' method 'compare:' cannot be nil}}
}
NSComparisonResult f2(NSString* s) {
NSString *aString = 0;
return [s caseInsensitiveCompare:aString]; // expected-warning {{Argument to 'NSString' method 'caseInsensitiveCompare:' cannot be nil}}
}
NSComparisonResult f3(NSString* s, NSStringCompareOptions op) {
NSString *aString = 0;
return [s compare:aString options:op]; // expected-warning {{Argument to 'NSString' method 'compare:options:' cannot be nil}}
}
NSComparisonResult f4(NSString* s, NSStringCompareOptions op, NSRange R) {
NSString *aString = 0;
return [s compare:aString options:op range:R]; // expected-warning {{Argument to 'NSString' method 'compare:options:range:' cannot be nil}}
}
NSComparisonResult f5(NSString* s, NSStringCompareOptions op, NSRange R) {
NSString *aString = 0;
return [s compare:aString options:op range:R locale:0]; // expected-warning {{Argument to 'NSString' method 'compare:options:range:locale:' cannot be nil}}
}
NSArray *f6(NSString* s) {
return [s componentsSeparatedByCharactersInSet:0]; // expected-warning {{Argument to 'NSString' method 'componentsSeparatedByCharactersInSet:' cannot be nil}}
}
NSString* f7(NSString* s1, NSString* s2, NSString* s3) {
NSString* s4 = (NSString*)
CFStringCreateWithFormat(kCFAllocatorDefault, 0, // expected-warning{{leak}}
(CFStringRef) __builtin___CFStringMakeConstantString("%@ %@ (%@)"),
s1, s2, s3);
CFRetain(s4);
return s4;
}
NSMutableArray* f8(void) {
NSString* s = [[NSString alloc] init];
NSMutableArray* a = [[NSMutableArray alloc] initWithCapacity:2];
[a addObject:s];
[s release]; // no-warning
return a;
}
void f9(void) {
NSString* s = [[NSString alloc] init];
NSString* q = s;
[s release];
[q release]; // expected-warning {{used after it is released}}
}
NSString* f10(void) {
static NSString* s = 0;
if (!s) s = [[NSString alloc] init];
return s; // no-warning
}
// Essentially 's' should not be considered allocated on the false branch.
// This exercises the 'EvalAssume' logic in GRTransferFuncs (CFRefCount.cpp).
NSString* f11(CFDictionaryRef dict, const char* key) {
NSString* s = (NSString*) CFDictionaryGetValue(dict, key);
[s retain];
if (s) {
[s release];
}
return 0;
}
// Test case for passing a tracked object by-reference to a function we
// don't understand.
void unknown_function_f12(NSString** s);
void f12(void) {
NSString *string = [[NSString alloc] init];
unknown_function_f12(&string); // no-warning
}
// Test double release of CFString (PR 4014).
void f13(void) {
CFStringRef ref = CFStringCreateWithFormat(kCFAllocatorDefault, ((void*)0), ((CFStringRef) __builtin___CFStringMakeConstantString ("" "%d" "")), 100);
CFRelease(ref);
CFRelease(ref); // expected-warning{{Reference-counted object is used after it is released}}
}
@interface MyString : NSString
@end
void f14(MyString *s) {
[s compare:0]; // expected-warning {{Argument to 'MyString' method 'compare:' cannot be nil}}
}
// Test regular use of -autorelease
@interface TestAutorelease
-(NSString*) getString;
@end
@implementation TestAutorelease
-(NSString*) getString {
NSString *str = [[NSString alloc] init];
return [str autorelease]; // no-warning
}
- (void)m1
{
NSString *s = [[NSString alloc] init]; // expected-warning{{leak}}
[s retain];
[s autorelease];
}
- (void)m2
{
NSString *s = [[[NSString alloc] init] autorelease]; // expected-warning{{leak}}
[s retain];
}
- (void)m3
{
NSString *s = [[[NSString alloc] init] autorelease];
[s retain];
[s autorelease];
}
- (void)m4
{
NSString *s = [[NSString alloc] init]; // expected-warning{{leak}}
[s retain];
}
- (void)m5
{
NSString *s = [[NSString alloc] init];
[s autorelease];
}
@end
@interface C1 : NSObject {}
- (NSString*) getShared;
+ (C1*) sharedInstance;
@end
@implementation C1 : NSObject {}
- (NSString*) getShared {
static NSString* s = 0;
if (!s) s = [[NSString alloc] init];
return s; // no-warning
}
+ (C1 *)sharedInstance {
static C1 *sharedInstance = 0;
if (!sharedInstance) {
sharedInstance = [[C1 alloc] init];
}
return sharedInstance; // no-warning
}
@end
@interface SharedClass : NSObject
+ (id)sharedInstance;
- (id)notShared;
@end
@implementation SharedClass
- (id)_init {
if ((self = [super init])) {
NSLog(@"Bar");
}
return self;
}
- (id)notShared {
return [[SharedClass alloc] _init]; // expected-warning{{leak}}
}
+ (id)sharedInstance {
static SharedClass *_sharedInstance = 0;
if (!_sharedInstance) {
_sharedInstance = [[SharedClass alloc] _init];
}
return _sharedInstance; // no-warning
}
@end
id testSharedClassFromFunction(void) {
return [[SharedClass alloc] _init]; // no-warning
}
#if !(defined(OSATOMIC_USE_INLINED) && OSATOMIC_USE_INLINED)
// Test OSCompareAndSwap
_Bool OSAtomicCompareAndSwapPtr( void *__oldValue, void *__newValue, void * volatile *__theValue );
extern BOOL objc_atomicCompareAndSwapPtr(id predicate, id replacement, volatile id *objectLocation);
#else
// Test that the body farm models are still used even when a body is available.
_Bool opaque_OSAtomicCompareAndSwapPtr( void *__oldValue, void *__newValue, void * volatile *__theValue );
_Bool OSAtomicCompareAndSwapPtr( void *__oldValue, void *__newValue, void * volatile *__theValue ) {
return opaque_OSAtomicCompareAndSwapPtr(__oldValue, __newValue, __theValue);
}
// Test that the analyzer doesn't crash when the farm model is used.
// The analyzer ignores the autosynthesized code.
_Bool OSAtomicCompareAndSwapEmptyFunction( void *__oldValue, void *__newValue, void * volatile *__theValue ) {
return 0;
}
extern BOOL opaque_objc_atomicCompareAndSwapPtr(id predicate, id replacement, volatile id *objectLocation);
extern BOOL objc_atomicCompareAndSwapPtr(id predicate, id replacement, volatile id *objectLocation) {
return opaque_objc_atomicCompareAndSwapPtr(predicate, replacement, objectLocation);
}
#endif
void testOSCompareAndSwap(void) {
NSString *old = 0;
NSString *s = [[NSString alloc] init]; // no-warning
if (!OSAtomicCompareAndSwapPtr(0, s, (void**) &old))
[s release];
else
[old release];
}
void testOSCompareAndSwapXXBarrier_local(void) {
NSString *old = 0;
NSString *s = [[NSString alloc] init]; // no-warning
if (!COMPARE_SWAP_BARRIER((intptr_t) 0, (intptr_t) s, (intptr_t*) &old))
[s release];
else
[old release];
}
void testOSCompareAndSwapXXBarrier_local_no_direct_release(void) {
NSString *old = 0;
NSString *s = [[NSString alloc] init]; // no-warning
if (!COMPARE_SWAP_BARRIER((intptr_t) 0, (intptr_t) s, (intptr_t*) &old))
return;
else
[old release];
}
int testOSCompareAndSwapXXBarrier_id(Class myclass, id xclass) {
if (COMPARE_SWAP_BARRIER(0, (intptr_t) myclass, (intptr_t*) &xclass))
return 1;
return 0;
}
void test_objc_atomicCompareAndSwap_local(void) {
NSString *old = 0;
NSString *s = [[NSString alloc] init]; // no-warning
if (!objc_atomicCompareAndSwapPtr(0, s, &old))
[s release];
else
[old release];
}
void test_objc_atomicCompareAndSwap_local_no_direct_release(void) {
NSString *old = 0;
NSString *s = [[NSString alloc] init]; // no-warning
if (!objc_atomicCompareAndSwapPtr(0, s, &old))
return;
else
[old release];
}
void test_objc_atomicCompareAndSwap_parameter(NSString **old) {
NSString *s = [[NSString alloc] init]; // no-warning
if (!objc_atomicCompareAndSwapPtr(0, s, old))
[s release];
else
[*old release];
}
void test_objc_atomicCompareAndSwap_parameter_no_direct_release(NSString **old) {
NSString *s = [[NSString alloc] init]; // expected-warning{{leak}}
if (!objc_atomicCompareAndSwapPtr(0, s, old))
return;
else
[*old release];
}
// Test stringWithFormat
void test_stringWithFormat(void) {
NSString *string = [[NSString stringWithFormat:@"%ld", (long) 100] retain];
[string release];
[string release]; // expected-warning{{Incorrect decrement of the reference count}}
}
// Test isTrackedObjectType(void).
typedef NSString* WonkyTypedef;
@interface TestIsTracked
+ (WonkyTypedef)newString;
@end
void test_isTrackedObjectType(void) {
NSString *str = [TestIsTracked newString]; // expected-warning{{Potential leak}}
}
// Test isTrackedCFObjectType().
@interface TestIsCFTracked
+ (CFStringRef) badNewCFString;
+ (CFStringRef) newCFString;
@end
@implementation TestIsCFTracked
+ (CFStringRef) newCFString {
return CFStringCreateWithFormat(kCFAllocatorDefault, ((void*)0), ((CFStringRef) __builtin___CFStringMakeConstantString ("" "%d" "")), 100); // no-warning
}
+ (CFStringRef) badNewCFString {
return CFStringCreateWithFormat(kCFAllocatorDefault, ((void*)0), ((CFStringRef) __builtin___CFStringMakeConstantString ("" "%d" "")), 100); // expected-warning{{leak}}
}
// Test @synchronized
void test_synchronized(id x) {
@synchronized(x) {
NSString *string = [[NSString stringWithFormat:@"%ld", (long) 100] retain]; // expected-warning {{leak}}
}
}
@end
void testOSCompareAndSwapXXBarrier_parameter(NSString **old) {
NSString *s = [[NSString alloc] init]; // no-warning
if (!COMPARE_SWAP_BARRIER((intptr_t) 0, (intptr_t) s, (intptr_t*) old))
[s release];
else
[*old release];
}
void testOSCompareAndSwapXXBarrier_parameter_no_direct_release(NSString **old) {
NSString *s = [[NSString alloc] init]; // no-warning
if (!COMPARE_SWAP_BARRIER((intptr_t) 0, (intptr_t) s, (intptr_t*) old))
[s release];
else
return;
}
@interface AlwaysInlineBodyFarmBodies : NSObject {
NSString *_value;
}
- (NSString *)_value;
- (void)callValue;
@end
@implementation AlwaysInlineBodyFarmBodies
- (NSString *)_value {
if (!_value) {
NSString *s = [[NSString alloc] init];
if (!OSAtomicCompareAndSwapPtr(0, s, (void**)&_value)) {
[s release];
}
}
return _value;
}
- (void)callValue {
[self _value];
}
@end