blob: 9fd15d3e7a5b3e1231007e5dbe03c3c8514ff457 [file] [log] [blame]
// RUN: clang -analyze -checker-cfref -verify %s &&
// RUN: clang -analyze -checker-cfref -analyzer-store=region -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 struct {} div_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);
extern void CFArrayAppendValue(CFMutableArrayRef theArray, const void *value);
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;
extern CFAbsoluteTime CFAbsoluteTimeGetCurrent(void);
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 struct {
}
CFRunLoopObserverContext;
typedef signed char BOOL;
typedef unsigned int NSUInteger;
@class NSString, Protocol;
extern void NSLog(NSString *format, ...) __attribute__((format(__NSString__, 1, 2)));
typedef struct _NSZone NSZone;
@class NSInvocation, NSMethodSignature, NSCoder, NSString, NSEnumerator;
@protocol NSObject - (BOOL)isEqual:(id)object;
- (id)retain;
- (oneway void)release;
- (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)alloc;
+ (id)allocWithZone:(NSZone *)zone;
@end typedef float CGFloat;
@interface NSString : NSObject <NSCopying, NSMutableCopying, NSCoding> - (NSUInteger)length;
- (const char *)UTF8String;
- (id)initWithUTF8String:(const char *)nullTerminatedCString;
+ (id)stringWithUTF8String:(const char *)nullTerminatedCString;
- (id)init;
- (void)dealloc;
@end extern NSString * const NSCurrentLocaleDidChangeNotification ;
@protocol NSLocking - (void)lock;
@end extern NSString * const NSUndoManagerCheckpointNotification;
typedef enum {
ACL_READ_DATA = (1<<1), ACL_LIST_DIRECTORY = (1<<1), ACL_WRITE_DATA = (1<<2), ACL_ADD_FILE = (1<<2), ACL_EXECUTE = (1<<3), ACL_SEARCH = (1<<3), ACL_DELETE = (1<<4), ACL_APPEND_DATA = (1<<5), ACL_ADD_SUBDIRECTORY = (1<<5), ACL_DELETE_CHILD = (1<<6), ACL_READ_ATTRIBUTES = (1<<7), ACL_WRITE_ATTRIBUTES = (1<<8), ACL_READ_EXTATTRIBUTES = (1<<9), ACL_WRITE_EXTATTRIBUTES = (1<<10), ACL_READ_SECURITY = (1<<11), ACL_WRITE_SECURITY = (1<<12), ACL_CHANGE_OWNER = (1<<13) }
acl_entry_id_t;
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 NSResponder : NSObject <NSCoding> {
}
@end @class NSColor, NSFont, NSNotification;
typedef struct __CFlags {
}
_CFlags;
@interface NSCell : NSObject <NSCopying, NSCoding> {
}
@end @class NSDate, NSDictionary, NSError, NSException, NSNotification;
@interface NSManagedObjectContext : NSObject <NSCoding, NSLocking> {
}
@end enum {
kDAReturnSuccess = 0, kDAReturnError = (((0x3e)&0x3f)<<26) | (((0x368)&0xfff)<<14) | 0x01, kDAReturnBusy = (((0x3e)&0x3f)<<26) | (((0x368)&0xfff)<<14) | 0x02, kDAReturnBadArgument = (((0x3e)&0x3f)<<26) | (((0x368)&0xfff)<<14) | 0x03, kDAReturnExclusiveAccess = (((0x3e)&0x3f)<<26) | (((0x368)&0xfff)<<14) | 0x04, kDAReturnNoResources = (((0x3e)&0x3f)<<26) | (((0x368)&0xfff)<<14) | 0x05, kDAReturnNotFound = (((0x3e)&0x3f)<<26) | (((0x368)&0xfff)<<14) | 0x06, kDAReturnNotMounted = (((0x3e)&0x3f)<<26) | (((0x368)&0xfff)<<14) | 0x07, kDAReturnNotPermitted = (((0x3e)&0x3f)<<26) | (((0x368)&0xfff)<<14) | 0x08, kDAReturnNotPrivileged = (((0x3e)&0x3f)<<26) | (((0x368)&0xfff)<<14) | 0x09, kDAReturnNotReady = (((0x3e)&0x3f)<<26) | (((0x368)&0xfff)<<14) | 0x0A, kDAReturnNotWritable = (((0x3e)&0x3f)<<26) | (((0x368)&0xfff)<<14) | 0x0B, kDAReturnUnsupported = (((0x3e)&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 );
//===----------------------------------------------------------------------===//
// Test cases.
//===----------------------------------------------------------------------===//
CFAbsoluteTime f1() {
CFAbsoluteTime t = CFAbsoluteTimeGetCurrent();
CFDateRef date = CFDateCreate(0, t);
CFRetain(date);
CFRelease(date);
CFDateGetAbsoluteTime(date); // no-warning
CFRelease(date);
t = CFDateGetAbsoluteTime(date); // expected-warning{{Reference-counted object is used after it is released.}}
return t;
}
CFAbsoluteTime f2() {
CFAbsoluteTime t = CFAbsoluteTimeGetCurrent();
CFDateRef date = CFDateCreate(0, t);
[((NSDate*) date) retain];
CFRelease(date);
CFDateGetAbsoluteTime(date); // no-warning
[((NSDate*) date) release];
t = CFDateGetAbsoluteTime(date); // expected-warning{{Reference-counted object is used after it is released.}}
return t;
}
NSDate* global_x;
// Test to see if we supresss an error when we store the pointer
// to a global.
CFAbsoluteTime f3() {
CFAbsoluteTime t = CFAbsoluteTimeGetCurrent();
CFDateRef date = CFDateCreate(0, t);
[((NSDate*) date) retain];
CFRelease(date);
CFDateGetAbsoluteTime(date); // no-warning
global_x = (NSDate*) date;
[((NSDate*) date) release];
t = CFDateGetAbsoluteTime(date); // no-warning
return t;
}
//---------------------------------------------------------------------------
// Test case 'f4' differs for region store and basic store. See
// retain-release-region-store.m and retain-release-basic-store.m.
//---------------------------------------------------------------------------
// Test a leak.
CFAbsoluteTime f5(int x) {
CFAbsoluteTime t = CFAbsoluteTimeGetCurrent();
CFDateRef date = CFDateCreate(0, t); // expected-warning{{leak}}
if (x)
CFRelease(date);
return t;
}
// Test a leak involving the return.
CFDateRef f6(int x) {
CFDateRef date = CFDateCreate(0, CFAbsoluteTimeGetCurrent()); // expected-warning{{leak}}
CFRetain(date);
return date;
}
// Test a leak involving an overwrite.
CFDateRef f7() {
CFDateRef date = CFDateCreate(0, CFAbsoluteTimeGetCurrent()); //expected-warning{{leak}}
CFRetain(date);
date = CFDateCreate(0, CFAbsoluteTimeGetCurrent());
return date;
}
// Generalization of Create rule. MyDateCreate returns a CFXXXTypeRef, and
// has the word create.
CFDateRef MyDateCreate();
CFDateRef f8() {
CFDateRef date = MyDateCreate(); // expected-warning{{leak}}
CFRetain(date);
return date;
}
CFDateRef f9() {
CFDateRef date = CFDateCreate(0, CFAbsoluteTimeGetCurrent());
int *p = 0;
// When allocations fail, CFDateCreate can return null.
if (!date) *p = 1; // expected-warning{{null}}
return date;
}
// Handle DiskArbitration API:
//
// http://developer.apple.com/DOCUMENTATION/DARWIN/Reference/DiscArbitrationFramework/
//
void f10(io_service_t media, DADiskRef d, CFStringRef s) {
DADiskRef disk = DADiskCreateFromBSDName(kCFAllocatorDefault, 0, "hello"); // expected-warning{{leak}}
if (disk) NSLog(@"ok");
disk = DADiskCreateFromIOMedia(kCFAllocatorDefault, 0, media); // expected-warning{{leak}}
if (disk) NSLog(@"ok");
CFDictionaryRef dict = DADiskCopyDescription(d); // expected-warning{{leak}}
if (dict) NSLog(@"ok");
disk = DADiskCopyWholeDisk(d); // expected-warning{{leak}}
if (disk) NSLog(@"ok");
DADissenterRef dissenter = DADissenterCreate(kCFAllocatorDefault, // expected-warning{{leak}}
kDAReturnSuccess, s);
if (dissenter) NSLog(@"ok");
DASessionRef session = DASessionCreate(kCFAllocatorDefault); // expected-warning{{leak}}
if (session) NSLog(@"ok");
}
// Test retain/release checker with CFString and CFMutableArray.
void f11() {
// Create the array.
CFMutableArrayRef A = CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks);
// Create a string.
CFStringRef s1 = CFStringCreateWithCString(0, "hello world",
kCFStringEncodingUTF8);
// Add the string to the array.
CFArrayAppendValue(A, s1);
// Decrement the reference count.
CFRelease(s1); // no-warning
// Get the string. We don't own it.
s1 = (CFStringRef) CFArrayGetValueAtIndex(A, 0);
// Release the array.
CFRelease(A); // no-warning
// Release the string. This is a bug.
CFRelease(s1); // expected-warning{{Incorrect decrement of the reference count}}
}
// PR 3337: Handle functions declared using typedefs.
typedef CFTypeRef CREATEFUN();
CREATEFUN MyCreateFun;
void f12() {
CFTypeRef o = MyCreateFun(); // expected-warning {{leak}}
}
void f13_autorelease() {
CFMutableArrayRef A = CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks);
[(id) A autorelease]; // no-warning
}
// This case exercises the logic where the leak site is the same as the allocation site.
void f14_leakimmediately() {
CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks); // expected-warning{{leak}}
}
// Test basic tracking of ivars associated with 'self'. For the retain/release
// checker we currently do not want to flag leaks associated with stores
// of tracked objects to ivars.
@interface SelfIvarTest : NSObject {
id myObj;
}
- (void)test_self_tracking;
@end
@implementation SelfIvarTest
- (void)test_self_tracking {
myObj = (id) CFArrayCreateMutable(0, 10, &kCFTypeArrayCallBacks); // no-warning
}
@end
// <rdar://problem/6659160>
int isFoo(char c);
static void rdar_6659160(char *inkind, char *inname)
{
// We currently expect that [NSObject alloc] cannot fail. This
// will be a toggled flag in the future. It can indeed return null, but
// Cocoa programmers generally aren't expected to reason about out-of-memory
// conditions.
NSString *kind = [[NSString alloc] initWithUTF8String:inkind]; // expected-warning{{leak}}
// We do allow stringWithUTF8String to fail. This isn't really correct, as
// far as returning 0. In most error conditions it will throw an exception.
// If allocation fails it could return 0, but again this
// isn't expected.
NSString *name = [NSString stringWithUTF8String:inname];
if(!name)
return;
const char *kindC = 0;
const char *nameC = 0;
// In both cases, we cannot reach a point down below where we
// dereference kindC or nameC with either being null. This is because
// we assume that [NSObject alloc] doesn't fail and that we have the guard
// up above.
if(kind)
kindC = [kind UTF8String];
if(name)
nameC = [name UTF8String];
if(!isFoo(kindC[0])) // expected-warning{{null}}
return;
if(!isFoo(nameC[0])) // no-warning
return;
[kind release];
[name release];
}
// PR 3677 - 'allocWithZone' should be treated as following the Cocoa naming
// conventions with respect to 'return'ing ownership.
@interface PR3677: NSObject @end
@implementation PR3677
+ (id)allocWithZone:(NSZone *)inZone {
return [super allocWithZone:inZone]; // no-warning
}
@end
// PR 3820 - Reason about calls to -dealloc
void pr3820_DeallocInsteadOfRelease(void)
{
id foo = [[NSString alloc] init]; // no-warning
[foo dealloc];
// foo is not leaked, since it has been deallocated.
}
void pr3820_ReleaseAfterDealloc(void)
{
id foo = [[NSString alloc] init];
[foo dealloc];
[foo release]; // expected-warning{{used after it is release}}
// NSInternalInconsistencyException: message sent to deallocated object
}
void pr3820_DeallocAfterRelease(void)
{
NSLog(@"\n\n[%s]", __FUNCTION__);
id foo = [[NSString alloc] init];
[foo release];
[foo dealloc]; // expected-warning{{used after it is released}}
// message sent to released object
}
// From <rdar://problem/6704930>. The problem here is that 'length' binds to
// '($0 - 1)' after '--length', but SimpleConstraintManager doesn't know how to
// reason about '($0 - 1) > constant'. As a temporary hack, we drop the value
// of '($0 - 1)' and conjure a new symbol.
void rdar6704930(unsigned char *s, unsigned int length) {
NSString* name = 0;
if (s != 0) {
if (length > 0) {
while (length > 0) {
if (*s == ':') {
++s;
--length;
name = [[NSString alloc] init]; // no-warning
break;
}
++s;
--length;
}
if ((length == 0) && (name != 0)) {
[name release];
name = 0;
}
if (length == 0) { // no ':' found -> use it all as name
name = [[NSString alloc] init]; // no-warning
}
}
}
if (name != 0) {
[name release];
}
}