Fix race conditions in test class used throughout the std::thread tests.
The test class 'G' reads and writes to the same static variables in its
constructor, destructor and call operator. When threads are
constructed using `std::thread t((G()))` there is a race condition between the
destruction of the temporary and the execution of `G::operator()()`.
The fix is to simply create the input before creating the thread.
llvm-svn: 233946
GitOrigin-RevId: 9a37bc91d2d8a60f7872546f72d98123ae2288f6
10 files changed
