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 #if defined(__GNUC__) && __GNUC__ -0 < 6 25 // 26 // From libstdc++-v3/src/c++11/thread.cc 27 // 28 29 extern "C" void* _v_execute_native_thread_routine(void* __p) 30 { 31 std::thread::_Impl_base* __t = static_cast<std::thread::_Impl_base*>(__p); 32 std::thread::__shared_base_type __local; 33 __local.swap(__t->_M_this_ptr); 34 35 __try { 36 __t->_M_run(); 37 } __catch(const __cxxabiv1::__forced_unwind&) { 38 __throw_exception_again; 39 } __catch(...) { 40 std::terminate(); 41 } 42 43 return 0; 44 } 45 46 #include <system_error> 47 48 namespace std 49 { 50 void thread::_M_start_thread(__shared_base_type __b) 51 { 52 if (!__gthread_active_p()) 53 #if __EXCEPTIONS 54 throw system_error(make_error_code(errc::operation_not_permitted), 55 "Enable multithreading to use std::thread"); 56 #else 57 __throw_system_error(int(errc::operation_not_permitted)); 58 #endif 59 60 __b->_M_this_ptr = __b; 61 int __e = __gthread_create(&_M_id._M_thread, _v_execute_native_thread_routine, 62 __b.get()); 63 if (__e) { 64 __b->_M_this_ptr.reset(); 65 __throw_system_error(__e); 66 } 67 } 68 } 69 #endif 70
