| 1 | // RUN: %clang_tsan %s -o %t |
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| 2 | // RUN: %deflake %run %t 2>&1 | FileCheck %s |
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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 "../test.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.\n" ); |
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| 12 | print_address("addr=" , 1, &global); |
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| 13 | dispatch_semaphore_t done = dispatch_semaphore_create(0); |
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| 14 | barrier_init(barrier: &barrier, count: 2); |
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| 15 | |
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| 16 | global = 42; |
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| 17 | dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{ |
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| 18 | global = 43; |
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| 19 | barrier_wait(barrier: &barrier); |
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| 20 | }); |
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| 21 | |
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| 22 | dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{ |
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| 23 | barrier_wait(barrier: &barrier); |
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| 24 | global = 44; |
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| 25 | |
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| 26 | dispatch_semaphore_signal(done); |
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| 27 | }); |
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| 28 | |
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| 29 | dispatch_semaphore_wait(done, DISPATCH_TIME_FOREVER); |
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| 30 | fprintf(stderr, format: "Done.\n" ); |
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| 31 | } |
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| 32 | |
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| 33 | // CHECK: Hello world. |
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| 34 | // CHECK: addr=[[ADDR:0x[0-9,a-f]+]] |
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| 35 | // CHECK: WARNING: ThreadSanitizer: data race |
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| 36 | // CHECK: Location is global 'global' {{(of size 8 )?}}at [[ADDR]] (async-race.c.tmp+0x{{[0-9,a-f]+}}) |
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| 37 | // CHECK: Done. |
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| 38 | |
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