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