1// RUN: %clang_cc1 -triple=x86_64-apple-darwin -fsyntax-only -verify %s 2 3//====------------------------------------------------------------====// 4// Test deprecated direct usage of the 'isa' pointer. 5//====------------------------------------------------------------====// 6 7typedef unsigned long NSUInteger; 8 9typedef struct objc_object { 10 struct objc_class *isa; 11} *id; 12 13@interface NSObject { 14 id firstobj; 15 struct objc_class *isa; 16} 17- (id)performSelector:(SEL)aSelector;; 18@end 19@interface Whatever : NSObject 20+self; 21-(id)foo; 22@end 23 24static void func() { 25 26 id x; 27 28 // rdar://8290002 29 [(*x).isa self]; // expected-warning {{direct access to Objective-C's isa is deprecated in favor of object_getClass()}} 30 [x->isa self]; // expected-warning {{direct access to Objective-C's isa is deprecated in favor of object_getClass()}} 31 32 Whatever *y; 33 34 // GCC allows this, with the following warning: 35 // instance variable 'isa' is @protected; this will be a hard error in the future 36 // 37 // FIXME: see if we can avoid the warning that follows the error. 38 [(*y).isa self]; // expected-error {{instance variable 'isa' is protected}} \ 39 expected-warning{{receiver type 'struct objc_class *' is not 'id' or interface pointer, consider casting it to 'id'}} 40 [y->isa self]; // expected-error {{instance variable 'isa' is protected}} \ 41 expected-warning{{receiver type 'struct objc_class *' is not 'id' or interface pointer, consider casting it to 'id'}} 42} 43 44// rdar://11702488 45// If an ivar is (1) the first ivar in a root class and (2) named `isa`, 46// then it should get the same warnings that id->isa gets. 47 48@interface BaseClass { 49@public 50 Class isa; // expected-note 4 {{instance variable is declared here}} 51} 52@end 53 54@interface OtherClass { 55@public 56 id firstIvar; 57 Class isa; // note, not first ivar; 58} 59@end 60 61@interface Subclass : BaseClass @end 62 63@interface SiblingClass : BaseClass @end 64 65@interface Root @end 66 67@interface hasIsa : Root { 68@public 69 Class isa; // note, isa is not in root class 70} 71@end 72 73@implementation Subclass 74-(void)method { 75 hasIsa *u; 76 id v; 77 BaseClass *w; 78 Subclass *x; 79 SiblingClass *y; 80 OtherClass *z; 81 (void)v->isa; // expected-warning {{direct access to Objective-C's isa is deprecated in favor of object_getClass()}} 82 (void)w->isa; // expected-warning {{direct access to Objective-C's isa is deprecated in favor of object_getClass()}} 83 (void)x->isa; // expected-warning {{direct access to Objective-C's isa is deprecated in favor of object_getClass()}} 84 (void)y->isa; // expected-warning {{direct access to Objective-C's isa is deprecated in favor of object_getClass()}} 85 (void)z->isa; 86 (void)u->isa; 87 88 w->isa = 0; // expected-warning {{assignment to Objective-C's isa is deprecated in favor of object_setClass()}} 89} 90@end 91 92// Test for introspection of Objective-C pointers via bitmasking. 93 94void testBitmasking(NSObject *p) { 95 (void) (((NSUInteger) p) & 0x1); // expected-warning {{bitmasking for introspection of Objective-C object pointers is strongly discouraged}} 96 (void) (0x1 & ((NSUInteger) p)); // expected-warning {{bitmasking for introspection of Objective-C object pointers is strongly discouraged}} 97 (void) (((NSUInteger) p) ^ 0x1); // no-warning 98 (void) (0x1 ^ ((NSUInteger) p)); // no-warning 99 (void) (0x1 & ((NSUInteger) [p performSelector:@selector(foo)])); // expected-warning {{bitmasking for introspection of Objective-C object pointers is strongly discouraged}} 100#pragma clang diagnostic push 101#pragma clang diagnostic ignored "-Wdeprecated-objc-pointer-introspection-performSelector" 102 (void) (0x1 & ((NSUInteger) [p performSelector:@selector(foo)])); // no-warning 103#pragma clang diagnostic pop 104}