drd/tests/std_thread2.cpp

   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 #include <unistd.h>
  16
  17 static int i;
  18
  19 int main(int argc, char** argv)
  20 {
  21   std::thread t1( []() { sleep(1); i = 1; } );
  22   std::thread t2( []() { i = 2; } );
  23   t2.join();
  24   t1.join();
  25   std::cerr << "Done.\n";
  26   return 0;
  27 }
  28
  29 #if defined(__GNUC__) && __GNUC__ -0 < 6
  30 //
  31 // From libstdc++-v3/src/c++11/thread.cc
  32 //
  33
  34 extern "C" void* _v_execute_native_thread_routine(void* __p)
  35 {
  36   std::thread::_Impl_base* __t = static_cast<std::thread::_Impl_base*>(__p);
  37   std::thread::__shared_base_type __local;
  38   __local.swap(__t->_M_this_ptr);
  39
  40   __try {
  41     __t->_M_run();
  42   } __catch(const __cxxabiv1::__forced_unwind&) {
  43     __throw_exception_again;
  44   } __catch(...) {
  45     std::terminate();
  46   }
  47
  48   return 0;
  49 }
  50
  51 #include <system_error>
  52
  53 namespace std
  54 {
  55   void thread::_M_start_thread(__shared_base_type __b)
  56   {
  57     if (!__gthread_active_p())
  58 #if __EXCEPTIONS
  59       throw system_error(make_error_code(errc::operation_not_permitted),
  60                          "Enable multithreading to use std::thread");
  61 #else
  62       __throw_system_error(int(errc::operation_not_permitted));
  63 #endif
  64
  65     __b->_M_this_ptr = __b;
  66     int __e = __gthread_create(&_M_id._M_thread, _v_execute_native_thread_routine,
  67                                __b.get());
  68     if (__e) {
  69       __b->_M_this_ptr.reset();
  70       __throw_system_error(__e);
  71     }
  72   }
  73 }
  74 #endif