forked from OSchip/llvm-project
92 lines
3.8 KiB
Objective-C
92 lines
3.8 KiB
Objective-C
// RUN: %clang_cc1 -fsyntax-only -fobjc-runtime-has-weak -fobjc-arc -fblocks -verify %s
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@interface Test0
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- (void) setBlock: (void(^)(void)) block;
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- (void) addBlock: (void(^)(void)) block;
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- (void) actNow;
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@end
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void test0(Test0 *x) {
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[x setBlock: // expected-note {{block will be retained by the captured object}}
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^{ [x actNow]; }]; // expected-warning {{capturing 'x' strongly in this block is likely to lead to a retain cycle}}
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x.block = // expected-note {{block will be retained by the captured object}}
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^{ [x actNow]; }; // expected-warning {{capturing 'x' strongly in this block is likely to lead to a retain cycle}}
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[x addBlock: // expected-note {{block will be retained by the captured object}}
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^{ [x actNow]; }]; // expected-warning {{capturing 'x' strongly in this block is likely to lead to a retain cycle}}
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// These actually don't cause retain cycles.
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__weak Test0 *weakx = x;
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[x addBlock: ^{ [weakx actNow]; }];
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[x setBlock: ^{ [weakx actNow]; }];
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x.block = ^{ [weakx actNow]; };
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// These do cause retain cycles, but we're not clever enough to figure that out.
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[weakx addBlock: ^{ [x actNow]; }];
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[weakx setBlock: ^{ [x actNow]; }];
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weakx.block = ^{ [x actNow]; };
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}
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@interface BlockOwner
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@property (retain) void (^strong)(void); // expected-warning {{retain'ed block property does not copy the block - use copy attribute instead}}
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@end
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@interface Test1 {
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@public
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BlockOwner *owner;
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};
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@property (retain) BlockOwner *owner;
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@property (assign) __strong BlockOwner *owner2; // expected-error {{unsafe_unretained property 'owner2' may not also be declared __strong}}
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@property (assign) BlockOwner *owner3;
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@end
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void test1(Test1 *x) {
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x->owner.strong = ^{ (void) x; }; // expected-warning {{retain cycle}} expected-note {{block will be retained by an object strongly retained by the captured object}}
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x.owner.strong = ^{ (void) x; }; // expected-warning {{retain cycle}} expected-note {{block will be retained by an object strongly retained by the captured object}}
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x.owner2.strong = ^{ (void) x; };
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x.owner3.strong = ^{ (void) x; };
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}
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@implementation Test1 {
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BlockOwner * __unsafe_unretained owner3ivar;
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__weak BlockOwner *weakowner;
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}
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@dynamic owner;
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@dynamic owner2;
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@synthesize owner3 = owner3ivar;
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- (id) init {
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self.owner.strong = ^{ (void) owner; }; // expected-warning {{retain cycle}} expected-note {{block will be retained by an object strongly retained by the captured object}}
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self.owner2.strong = ^{ (void) owner; };
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// TODO: should we warn here? What's the story with this kind of mismatch?
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self.owner3.strong = ^{ (void) owner; };
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owner.strong = ^{ (void) owner; }; // expected-warning {{retain cycle}} expected-note {{block will be retained by an object strongly retained by the captured object}}
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owner.strong = ^{ ^{ (void) owner; }(); }; // expected-warning {{retain cycle}} expected-note {{block will be retained by an object strongly retained by the captured object}}
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owner.strong = ^{ (void) sizeof(self); // expected-note {{block will be retained by an object strongly retained by the captured object}}
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(void) owner; }; // expected-warning {{capturing 'self' strongly in this block is likely to lead to a retain cycle}}
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weakowner.strong = ^{ (void) owner; };
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return self;
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}
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- (void) foo {
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owner.strong = ^{ (void) owner; }; // expected-warning {{retain cycle}} expected-note {{block will be retained by an object strongly retained by the captured object}}
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}
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@end
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void test2_helper(id);
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@interface Test2 {
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void (^block)(void);
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id x;
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}
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@end
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@implementation Test2
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- (void) test {
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block = ^{ // expected-note {{block will be retained by an object strongly retained by the captured object}}
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test2_helper(x); // expected-warning {{capturing 'self' strongly in this block is likely to lead to a retain cycle}}
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};
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}
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@end
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