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// RUN: %clang_cc1 -analyze -analyzer-checker=core -analyzer-config suppress-inlined-defensive-checks=true -verify %s
typedef signed char BOOL;
typedef struct objc_class *Class;
typedef struct objc_object {
Class isa;
} *id;
@protocol NSObject - (BOOL)isEqual:(id)object; @end
@interface NSObject <NSObject> {}
+(id)alloc;
+(id)new;
-(id)init;
-(id)autorelease;
-(id)copy;
- (Class)class;
-(id)retain;
@end
// Check that inline defensive checks is triggered for null expressions
// within CompoundLiteralExpr.
typedef union {
struct dispatch_object_s *_do;
struct dispatch_source_s *_ds;
} dispatch_object_t __attribute__((__transparent_union__));
typedef struct dispatch_source_s *dispatch_source_t;
extern __attribute__((visibility("default"))) __attribute__((__nonnull__)) __attribute__((__nothrow__))
void
dispatch_resume(dispatch_object_t object);
@interface AppDelegate : NSObject {
@protected
dispatch_source_t p;
}
@end
@implementation AppDelegate
- (void)updateDeleteTimer {
if (p != ((void*)0))
;
}
- (void)createAndStartDeleteTimer {
[self updateDeleteTimer];
dispatch_resume(p); // no warning
}
@end
// Test nil receiver suppression.
// We only suppress on nil receiver if the nil value is directly causing the bug.
@interface Foo {
@public
int x;
}
- (Foo *)getFooPtr;
@end
Foo *retNil() {
return 0;
}
Foo *retInputOrNil(Foo *p) {
if (p)
return p;
return 0;
}
void idc(Foo *p) {
if (p)
;
}
int testNilReceiver(Foo* fPtr) {
if (fPtr)
;
// On a path where fPtr is nil, mem should be nil.
Foo *mem = [fPtr getFooPtr];
return mem->x; // expected-warning {{Access to instance variable 'x' results in a dereference of a null pointer}}
}
int suppressNilReceiverRetNullCond(Foo* fPtr) {
unsigned zero = 0;
fPtr = retInputOrNil(fPtr);
// On a path where fPtr is nzil, mem should be nil.
Foo *mem = [fPtr getFooPtr];
return mem->x;
}
int suppressNilReceiverRetNullCondCast(id fPtr) {
unsigned zero = 0;
fPtr = retInputOrNil(fPtr);
// On a path where fPtr is nzil, mem should be nil.
Foo *mem = ((id)([(Foo*)(fPtr) getFooPtr]));
return mem->x;
}
int dontSuppressNilReceiverRetNullCond(Foo* fPtr) {
unsigned zero = 0;
fPtr = retInputOrNil(fPtr);
// On a path where fPtr is nil, mem should be nil.
// The warning is not suppressed because the receiver being nil is not
// directly related to the value that triggers the warning.
Foo *mem = [fPtr getFooPtr];
if (!mem)
return 5/zero; // expected-warning {{Division by zero}}
return 0;
}
int dontSuppressNilReceiverRetNull(Foo* fPtr) {
unsigned zero = 0;
fPtr = retNil();
// On a path where fPtr is nil, mem should be nil.
// The warning is not suppressed because the receiver being nil is not
// directly related to the value that triggers the warning.
Foo *mem = [fPtr getFooPtr];
if (!mem)
return 5/zero; // expected-warning {{Division by zero}}
return 0;
}
int dontSuppressNilReceiverIDC(Foo* fPtr) {
unsigned zero = 0;
idc(fPtr);
// On a path where fPtr is nil, mem should be nil.
// The warning is not suppressed because the receiver being nil is not
// directly related to the value that triggers the warning.
Foo *mem = [fPtr getFooPtr];
if (!mem)
return 5/zero; // expected-warning {{Division by zero}}
return 0;
}
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