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Diffstat (limited to 'test/Analysis/retain-release.m')
| -rw-r--r-- | test/Analysis/retain-release.m | 239 |
1 files changed, 239 insertions, 0 deletions
diff --git a/test/Analysis/retain-release.m b/test/Analysis/retain-release.m new file mode 100644 index 0000000000..b548f2d26b --- /dev/null +++ b/test/Analysis/retain-release.m @@ -0,0 +1,239 @@ +// RUN: clang -checker-cfref -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> { +} +@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 = (((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 to see if we supresss an error when we store the pointer +// to a struct. + +struct foo { + NSDate* f; +}; + +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]; + t = CFDateGetAbsoluteTime(date); // no-warning + return t; +} + +// Test a leak. + +CFAbsoluteTime f5(int x) { + CFAbsoluteTime t = CFAbsoluteTimeGetCurrent(); + CFDateRef date = CFDateCreate(0, t); + + if (x) + CFRelease(date); + + return t; // expected-warning{{leak}} +} + +// Test a leak involving the return. + +CFDateRef f6(int x) { + CFDateRef date = CFDateCreate(0, CFAbsoluteTimeGetCurrent()); + CFRetain(date); + return date; // expected-warning{{leak}} +} + +// Test a leak involving an overwrite. + +CFDateRef f7() { + CFDateRef date = CFDateCreate(0, CFAbsoluteTimeGetCurrent()); + CFRetain(date); //expected-warning{{leak}} + 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(); + CFRetain(date); + return date; // expected-warning{{leak}} +} + +CFDateRef f9() { + CFDateRef date = CFDateCreate(0, CFAbsoluteTimeGetCurrent()); + int *p = 0; + // test that the checker assumes that CFDateCreate returns a non-null + // pointer + if (!date) *p = 1; // no-warning + 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"); + if (disk) NSLog(@"ok"); // expected-warning{{leak}} + + disk = DADiskCreateFromIOMedia(kCFAllocatorDefault, 0, media); + if (disk) NSLog(@"ok"); // expected-warning{{leak}} + + CFDictionaryRef dict = DADiskCopyDescription(d); + if (dict) NSLog(@"ok"); // expected-warning{{leak}} + + disk = DADiskCopyWholeDisk(d); + if (disk) NSLog(@"ok"); // expected-warning{{leak}} + + DADissenterRef dissenter = DADissenterCreate(kCFAllocatorDefault, + kDAReturnSuccess, s); + if (dissenter) NSLog(@"ok"); // expected-warning{{leak}} + + DASessionRef session = DASessionCreate(kCFAllocatorDefault); + if (session) NSLog(@"ok"); // expected-warning{{leak}} +} + +// 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}} +} + |