| 1 | // This test verifies that dispatch_sync() doesn't actually copy the block under TSan (without TSan, it doesn't). |
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| 2 | |
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| 3 | // RUN: %clang_tsan %s -o %t_no_tsan -framework Foundation -fno-sanitize=thread |
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| 4 | // RUN: %clang_tsan %s -o %t_with_tsan -framework Foundation |
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| 5 | |
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| 6 | // RUN: %run %t_no_tsan 2>&1 | FileCheck %s |
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| 7 | // RUN: %run %t_with_tsan 2>&1 | FileCheck %s |
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| 8 | |
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| 9 | #import <Foundation/Foundation.h> |
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| 10 | |
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| 11 | @interface MyClass : NSObject |
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| 12 | @end |
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| 13 | |
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| 14 | @implementation MyClass |
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| 15 | - (instancetype)retain { |
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| 16 | // Copying the dispatch_sync'd block below will increment the retain count of |
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| 17 | // this object. Abort if that happens. |
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| 18 | abort(); |
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| 19 | } |
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| 20 | @end |
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| 21 | |
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| 22 | int main(int argc, const char* argv[]) { |
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| 23 | dispatch_queue_t q = dispatch_queue_create("my.queue" , NULL); |
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| 24 | id object = [[MyClass alloc] init]; |
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| 25 | void (^block)(void) = ^ { |
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| 26 | NSLog(@"%@" , object); |
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| 27 | }; |
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| 28 | dispatch_sync(q, ^{ |
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| 29 | NSLog(@"%@" , object); |
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| 30 | }); |
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| 31 | dispatch_sync(q, block); |
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| 32 | [object release]; |
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| 33 | NSLog(@"Done." ); |
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| 34 | return 0; |
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| 35 | } |
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| 36 | |
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| 37 | // CHECK: Done. |
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| 38 | // CHECK-NOT: WARNING: ThreadSanitizer |
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| 39 | |
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