| 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(int argc, const char *argv[]) { |
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| 11 | barrier_init(barrier: &barrier, count: 2); |
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| 12 | fprintf(stderr, format: "start\n" ); |
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| 13 | |
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| 14 | // Warm up GCD (workaround for macOS Sierra where dispatch_apply might run single-threaded). |
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| 15 | dispatch_sync(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{ }); |
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| 16 | |
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| 17 | dispatch_queue_t q = dispatch_queue_create("my.queue" , DISPATCH_QUEUE_CONCURRENT); |
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| 18 | dispatch_apply(2, q, ^(size_t i) { |
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| 19 | global = i; |
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| 20 | barrier_wait(barrier: &barrier); |
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| 21 | }); |
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| 22 | |
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| 23 | fprintf(stderr, format: "done\n" ); |
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| 24 | return 0; |
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| 25 | } |
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| 26 | |
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| 27 | // CHECK: start |
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| 28 | // CHECK: WARNING: ThreadSanitizer: data race |
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| 29 | // CHECK: Location is global 'global' |
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| 30 | // CHECK: done |
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| 31 | |
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