| 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 | #include "../test.h" |
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| 6 | |
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| 7 | long global; |
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| 8 | |
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| 9 | int main() { |
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| 10 | fprintf(stderr, format: "Hello world.\n" ); |
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| 11 | print_address("addr=" , 1, &global); |
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| 12 | dispatch_semaphore_t done = dispatch_semaphore_create(0); |
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| 13 | barrier_init(barrier: &barrier, count: 2); |
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| 14 | |
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| 15 | dispatch_queue_t q1 = dispatch_queue_create("my.queue1" , DISPATCH_QUEUE_CONCURRENT); |
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| 16 | dispatch_queue_t q2 = dispatch_queue_create("my.queue2" , DISPATCH_QUEUE_CONCURRENT); |
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| 17 | |
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| 18 | global = 42; |
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| 19 | dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{ |
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| 20 | dispatch_sync(q1, ^{ |
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| 21 | global = 43; |
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| 22 | barrier_wait(barrier: &barrier); |
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| 23 | }); |
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| 24 | }); |
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| 25 | dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{ |
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| 26 | dispatch_sync(q2, ^{ |
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| 27 | barrier_wait(barrier: &barrier); |
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| 28 | global = 44; |
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| 29 | |
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| 30 | dispatch_semaphore_signal(done); |
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| 31 | }); |
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| 32 | }); |
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| 33 | |
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| 34 | dispatch_semaphore_wait(done, DISPATCH_TIME_FOREVER); |
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| 35 | fprintf(stderr, format: "Done.\n" ); |
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| 36 | } |
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| 37 | |
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| 38 | // CHECK: Hello world. |
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| 39 | // CHECK: addr=[[ADDR:0x[0-9,a-f]+]] |
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| 40 | // CHECK: WARNING: ThreadSanitizer: data race |
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| 41 | // CHECK: Location is global 'global' {{(of size 8 )?}}at [[ADDR]] (sync-race.c.tmp+0x{{[0-9,a-f]+}}) |
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| 42 | // CHECK: Done. |
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| 43 | |
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