| 1 | // RUN: %clangxx_tsan %s -o %t -framework Foundation -std=c++11 |
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| 2 | // RUN: %run %t 2>&1 | FileCheck %s |
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| 3 | |
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| 4 | #import <Foundation/Foundation.h> |
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| 5 | |
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| 6 | #import <iostream> |
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| 7 | #import <thread> |
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| 8 | |
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| 9 | long my_global; |
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| 10 | std::once_flag once_token; |
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| 11 | |
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| 12 | void thread_func() { |
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| 13 | std::call_once(once_token, [] { |
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| 14 | my_global = 17; |
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| 15 | }); |
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| 16 | |
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| 17 | long val = my_global; |
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| 18 | fprintf(stderr, "my_global = %ld\n" , val); |
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| 19 | } |
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| 20 | |
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| 21 | int main(int argc, const char *argv[]) { |
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| 22 | fprintf(stderr, "Hello world.\n" ); |
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| 23 | |
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| 24 | std::thread t1(thread_func); |
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| 25 | std::thread t2(thread_func); |
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| 26 | t1.join(); |
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| 27 | t2.join(); |
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| 28 | |
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| 29 | fprintf(stderr, "Done.\n" ); |
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| 30 | } |
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| 31 | |
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| 32 | // CHECK: Hello world. |
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| 33 | // CHECK-NOT: WARNING: ThreadSanitizer |
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| 34 | // CHECK: Done. |
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| 35 | |
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