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// 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 const struct __CFAllocator * CFAllocatorRef;
typedef double CFTimeInterval;
typedef CFTimeInterval CFAbsoluteTime;
typedef const struct __CFDate * CFDateRef;
extern CFDateRef CFDateCreate(CFAllocatorRef allocator, CFAbsoluteTime at);
typedef struct objc_object {} *id;
typedef signed char BOOL;
typedef unsigned int NSUInteger;
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
extern id NSAllocateObject(Class aClass, NSUInteger extraBytes, NSZone *zone);
typedef double NSTimeInterval;
@interface NSDate : NSObject <NSCopying, NSCoding> - (NSTimeInterval)timeIntervalSinceReferenceDate; @end
@class NSString, NSArray, NSTimeZone;
//===----------------------------------------------------------------------===//
// 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;
}
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