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// RUN: %clangxx_tsan %s -o %t -framework Foundation -std=c++11
// RUN: %run %t 2>&1 | FileCheck %s
#import <Foundation/Foundation.h>
#import <iostream>
#import <thread>
long my_global;
std::once_flag once_token;
void thread_func() {
std::call_once(once_token, [] {
my_global = 17;
});
long val = my_global;
fprintf(stderr, "my_global = %ld\n", val);
}
int main(int argc, const char *argv[]) {
fprintf(stderr, "Hello world.\n");
std::thread t1(thread_func);
std::thread t2(thread_func);
t1.join();
t2.join();
fprintf(stderr, "Done.\n");
}
// CHECK: Hello world.
// CHECK-NOT: WARNING: ThreadSanitizer
// CHECK: Done.
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