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
16int 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
28extern "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
47namespace 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