| 1 | // RUN: %clang_tsan %s -o %t |
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| 2 | // RUN: %run %t 2>&1 | FileCheck %s --implicit-check-not='ThreadSanitizer' |
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| 3 | |
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| 4 | #include <dispatch/dispatch.h> |
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| 5 | |
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| 6 | #include <stdio.h> |
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| 7 | |
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| 8 | long global; |
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| 9 | |
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| 10 | int main() { |
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| 11 | fprintf(stderr, format: "Hello world." ); |
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| 12 | |
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| 13 | global = 42; |
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| 14 | |
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| 15 | dispatch_semaphore_t sem = dispatch_semaphore_create(0); |
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| 16 | dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{ |
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| 17 | |
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| 18 | global = 43; |
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| 19 | dispatch_semaphore_signal(sem); |
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| 20 | }); |
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| 21 | |
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| 22 | dispatch_semaphore_wait(sem, DISPATCH_TIME_FOREVER); |
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| 23 | global = 44; |
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| 24 | |
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| 25 | fprintf(stderr, format: "Done." ); |
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| 26 | return 0; |
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| 27 | } |
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| 28 | |
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| 29 | // CHECK: Hello world. |
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| 30 | // CHECK: Done. |
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| 31 | |
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