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31 lines
758 B
31 lines
758 B
4 months ago
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// RUN: %clang_tsan %s -o %t
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// RUN: %deflake %run %t 2>&1 | FileCheck %s
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#include <dispatch/dispatch.h>
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#include "../test.h"
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long global;
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int main(int argc, const char *argv[]) {
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barrier_init(&barrier, 2);
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fprintf(stderr, "start\n");
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// Warm up GCD (workaround for macOS Sierra where dispatch_apply might run single-threaded).
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dispatch_sync(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{ });
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dispatch_queue_t q = dispatch_queue_create("my.queue", DISPATCH_QUEUE_CONCURRENT);
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dispatch_apply(2, q, ^(size_t i) {
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global = i;
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barrier_wait(&barrier);
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});
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fprintf(stderr, "done\n");
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return 0;
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}
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// CHECK: start
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// CHECK: WARNING: ThreadSanitizer: data race
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// CHECK: Location is global 'global'
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// CHECK: done
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