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