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 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 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 { 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
