Author: kuba.brecka Date: Wed Sep 14 09:15:42 2016 New Revision: 281477 URL: http://llvm.org/viewvc/llvm-project?rev=281477&view=rev Log: [libcxx] Add a TSan regression test for a data race in call_once
Differential Revision: https://reviews.llvm.org/D24297 Added: libcxx/trunk/test/std/thread/thread.mutex/thread.once/thread.once.callonce/race.pass.cpp Added: libcxx/trunk/test/std/thread/thread.mutex/thread.once/thread.once.callonce/race.pass.cpp URL: http://llvm.org/viewvc/llvm-project/libcxx/trunk/test/std/thread/thread.mutex/thread.once/thread.once.callonce/race.pass.cpp?rev=281477&view=auto ============================================================================== --- libcxx/trunk/test/std/thread/thread.mutex/thread.once/thread.once.callonce/race.pass.cpp (added) +++ libcxx/trunk/test/std/thread/thread.mutex/thread.once/thread.once.callonce/race.pass.cpp Wed Sep 14 09:15:42 2016 @@ -0,0 +1,48 @@ +//===----------------------------------------------------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is dual licensed under the MIT and the University of Illinois Open +// Source Licenses. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// UNSUPPORTED: libcpp-has-no-threads + +// <mutex> + +// struct once_flag; + +// template<class Callable, class ...Args> +// void call_once(once_flag& flag, Callable&& func, Args&&... args); + +// This test is supposed to be run with ThreadSanitizer and verifies that +// call_once properly synchronizes user state, a data race that was fixed +// in r280621. + +#include <mutex> +#include <thread> +#include <cassert> + +std::once_flag flg0; +long global = 0; + +void init0() +{ + ++global; +} + +void f0() +{ + std::call_once(flg0, init0); + assert(global == 1); +} + +int main() +{ + std::thread t0(f0); + std::thread t1(f0); + t0.join(); + t1.join(); + assert(global == 1); +} _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits