1 // Test whether no race conditions are reported on std::thread. Note: since
2 // the implementation of std::thread uses the shared pointer implementation,
3 // that implementation has to be annotated in order to avoid false positives.
4 // See also http://gcc.gnu.org/onlinedocs/libstdc++/manual/debug.html for more
5 // information.
6 
7 #include "../../drd/drd.h"
8 #define _GLIBCXX_SYNCHRONIZATION_HAPPENS_BEFORE(addr) \
9   ANNOTATE_HAPPENS_BEFORE(addr)
10 #define _GLIBCXX_SYNCHRONIZATION_HAPPENS_AFTER(addr) \
11   ANNOTATE_HAPPENS_AFTER(addr)
12 
13 #include <iostream>
14 #include <thread>
15 
main(int argc,char ** argv)16 int main(int argc, char** argv)
17 {
18   std::thread t( []() { } );
19   t.join();
20   std::cerr << "Done.\n";
21   return 0;
22 }
23 
24 //
25 // From libstdc++-v3/src/c++11/thread.cc
26 //
27 
execute_native_thread_routine(void * __p)28 extern "C" void* execute_native_thread_routine(void* __p)
29 {
30   std::thread::_Impl_base* __t = static_cast<std::thread::_Impl_base*>(__p);
31   std::thread::__shared_base_type __local;
32   __local.swap(__t->_M_this_ptr);
33 
34   __try {
35     __t->_M_run();
36   } __catch(const __cxxabiv1::__forced_unwind&) {
37     __throw_exception_again;
38   } __catch(...) {
39     std::terminate();
40   }
41 
42   return 0;
43 }
44 
45 #include <system_error>
46 
47 namespace std
48 {
_M_start_thread(__shared_base_type __b)49   void thread::_M_start_thread(__shared_base_type __b)
50   {
51     if (!__gthread_active_p())
52 #if __EXCEPTIONS
53       throw system_error(make_error_code(errc::operation_not_permitted),
54                          "Enable multithreading to use std::thread");
55 #else
56       __throw_system_error(int(errc::operation_not_permitted));
57 #endif
58 
59     __b->_M_this_ptr = __b;
60     int __e = __gthread_create(&_M_id._M_thread, execute_native_thread_routine,
61                                __b.get());
62     if (__e) {
63       __b->_M_this_ptr.reset();
64       __throw_system_error(__e);
65     }
66   }
67 }
68