201 lines
6.8 KiB
Objective-C
201 lines
6.8 KiB
Objective-C
// RUN: %clang_cc1 -fsyntax-only -fobjc-runtime-has-weak -fobjc-arc -fblocks -verify -Wno-objc-root-class -Wno-implicit-retain-self %s
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void *_Block_copy(const void *block);
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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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// rdar://11702054
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x.block = ^{ (void)x.actNow; }; // expected-warning {{capturing 'x' strongly in this block is likely to lead to a retain cycle}} \
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// expected-note {{block will be retained by the captured object}}
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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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@interface NSOperationQueue {}
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- (void)addOperationWithBlock:(void (^)(void))block;
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- (void)addSomethingElse:(void (^)(void))block;
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@end
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@interface Test3 {
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NSOperationQueue *myOperationQueue;
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unsigned count;
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}
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@end
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void doSomething(unsigned v);
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@implementation Test3
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- (void) test {
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// 'addOperationWithBlock:' is specifically whitelisted.
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[myOperationQueue addOperationWithBlock:^() { // no-warning
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if (count > 20) {
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doSomething(count);
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}
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}];
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}
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- (void) test_positive {
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// Sanity check that we are really whitelisting 'addOperationWithBlock:' and not doing
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// something funny.
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[myOperationQueue addSomethingElse:^() { // expected-note {{block will be retained by an object strongly retained by the captured object}}
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if (count > 20) {
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doSomething(count); // 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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}
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@end
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void testBlockVariable() {
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typedef void (^block_t)(void);
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// This case will be caught by -Wuninitialized, and does not create a
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// retain cycle.
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block_t a1 = ^{
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a1(); // no-warning
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};
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// This case will also be caught by -Wuninitialized.
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block_t a2;
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a2 = ^{
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a2(); // no-warning
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};
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__block block_t b1 = ^{ // expected-note{{block will be retained by the captured object}}
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b1(); // expected-warning{{capturing 'b1' strongly in this block is likely to lead to a retain cycle}}
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};
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__block block_t b2;
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b2 = ^{ // expected-note{{block will be retained by the captured object}}
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b2(); // expected-warning{{capturing 'b2' strongly in this block is likely to lead to a retain cycle}}
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};
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}
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@interface NSObject
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- (id)copy;
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- (void (^)(void))someRandomMethodReturningABlock;
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@end
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void testCopying(Test0 *obj) {
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typedef void (^block_t)(void);
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[obj setBlock:[^{ // expected-note{{block will be retained by the captured object}}
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[obj actNow]; // expected-warning{{capturing 'obj' strongly in this block is likely to lead to a retain cycle}}
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} copy]];
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[obj addBlock:(__bridge_transfer block_t)_Block_copy((__bridge void *)^{ // expected-note{{block will be retained by the captured object}}
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[obj actNow]; // expected-warning{{capturing 'obj' strongly in this block is likely to lead to a retain cycle}}
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})];
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[obj addBlock:[^{
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[obj actNow]; // no-warning
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} someRandomMethodReturningABlock]];
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extern block_t someRandomFunctionReturningABlock(block_t);
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[obj setBlock:someRandomFunctionReturningABlock(^{
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[obj actNow]; // no-warning
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})];
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}
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// rdar://16944538
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void func(int someCondition) {
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__block void(^myBlock)(void) = ^{
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if (someCondition) {
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doSomething(1);
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myBlock();
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}
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else {
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myBlock = ((void*)0);
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}
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};
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}
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