[Bug libstdc++/60966] std::call_once sometime hangs

[thomas.sanchz at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60966

--- Comment #6 from Thomas Sanchez <thomas.sanchz at gmail dot com> ---
Last comment on myself:

I got some errors relates to the promise with valgrind but they do not cause an
hangs

==30999== Thread 2:
==30999== Invalid read of size 4
==30999==    at 0x4E44A91: pthread_once (pthread_once.S:111)
==30999==    by 0x4F4274: __gthread_once(int*, void (*)()) (gthr-default.h:699)
==30999==    by 0x4FADBC: void std::call_once<void
(std::__future_base::_State_base::*)(std::function<std::unique_ptr<std::__future_base::_Result_base,
std::__future_base::_Result_base::_Deleter> ()>&, bool&),
std::__future_base::_State_base* const,
std::reference_wrapper<std::function<std::unique_ptr<std::__future_base::_Result_base,
std::__future_base::_Result_base::_Deleter> ()> >, std::reference_wrapper<bool>
>(std::once_flag&, void
(std::__future_base::_State_base::*&&)(std::function<std::unique_ptr<std::__future_base::_Result_base,
std::__future_base::_Result_base::_Deleter> ()>&, bool&),
std::__future_base::_State_base* const&&,
std::reference_wrapper<std::function<std::unique_ptr<std::__future_base::_Result_base,
std::__future_base::_Result_base::_Deleter> ()> >&&,
std::reference_wrapper<bool>&&) (mutex:786)
==30999==    by 0x4F75A2:
std::__future_base::_State_base::_M_set_result(std::function<std::unique_ptr<std::__future_base::_Result_base,
std::__future_base::_Result_base::_Deleter> ()>, bool) (future:358)
==30999==    by 0x50B666: std::promise<void>::set_value() (future:1197)
==30999==    by 0x506E1F:
HTTPP::HTTP::client::detail::Manager::check_handles(std::promise<void>&)
(Manager.cpp:87)
==30999==    by 0x51D9A6: void std::_Mem_fn<void
(HTTPP::HTTP::client::detail::Manager::*)(std::promise<void>&)>::operator()<std::promise<void>&,
void>(HTTPP::HTTP::client::detail::Manager*, std::promise<void>&) const (in
/home/daedric/perso/httpp/build/tests/client/Test_Client_promise)
==30999==    by 0x51CFBE: void std::_Bind<std::_Mem_fn<void
(HTTPP::HTTP::client::detail::Manager::*)(std::promise<void>&)>
(HTTPP::HTTP::client::detail::Manager*,
std::reference_wrapper<std::promise<void> >)>::__call<void, , 0ul,
1ul>(std::tuple<>&&, std::_Index_tuple<0ul, 1ul>) (functional:1296)
==30999==    by 0x51C4FF: void std::_Bind<std::_Mem_fn<void
(HTTPP::HTTP::client::detail::Manager::*)(std::promise<void>&)>
(HTTPP::HTTP::client::detail::Manager*,
std::reference_wrapper<std::promise<void> >)>::operator()<, void>()
(functional:1355)
==30999==    by 0x51B594: void
boost::asio::asio_handler_invoke<std::_Bind<std::_Mem_fn<void
(HTTPP::HTTP::client::detail::Manager::*)(std::promise<void>&)>
(HTTPP::HTTP::client::detail::Manager*,
std::reference_wrapper<std::promise<void> >)> >(std::_Bind<std::_Mem_fn<void
(HTTPP::HTTP::client::detail::Manager::*)(std::promise<void>&)>
(HTTPP::HTTP::client::detail::Manager*,
std::reference_wrapper<std::promise<void> >)>, ...)
(handler_invoke_hook.hpp:64)
==30999==    by 0x519E81: void
boost_asio_handler_invoke_helpers::invoke<std::_Bind<std::_Mem_fn<void
(HTTPP::HTTP::client::detail::Manager::*)(std::promise<void>&)>
(HTTPP::HTTP::client::detail::Manager*,
std::reference_wrapper<std::promise<void> >)>, std::_Bind<std::_Mem_fn<void
(HTTPP::HTTP::client::detail::Manager::*)(std::promise<void>&)>
(HTTPP::HTTP::client::detail::Manager*,
std::reference_wrapper<std::promise<void> >)> >(std::_Bind<std::_Mem_fn<void
(HTTPP::HTTP::client::detail::Manager::*)(std::promise<void>&)>
(HTTPP::HTTP::client::detail::Manager*,
std::reference_wrapper<std::promise<void> >)>&, std::_Bind<std::_Mem_fn<void
(HTTPP::HTTP::client::detail::Manager::*)(std::promise<void>&)>
(HTTPP::HTTP::client::detail::Manager*,
std::reference_wrapper<std::promise<void> >)>&) (handler_invoke_helpers.hpp:37)
==30999==    by 0x51B6CE:
boost::asio::detail::completion_handler<std::_Bind<std::_Mem_fn<void
(HTTPP::HTTP::client::detail::Manager::*)(std::promise<void>&)>
(HTTPP::HTTP::client::detail::Manager*,
std::reference_wrapper<std::promise<void> >)>
>::do_complete(boost::asio::detail::task_io_service*,
boost::asio::detail::task_io_service_operation*, boost::system::error_code
const&, unsigned long) (completion_handler.hpp:68)
==30999==  Address 0xdbd3b54 is 132 bytes inside a block of size 136 free'd
==30999==    at 0x4C2C2BC: operator delete(void*) (in
/usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==30999==    by 0x504C41:
__gnu_cxx::new_allocator<std::_Sp_counted_ptr_inplace<std::__future_base::_State_base,
std::allocator<std::__future_base::_State_base>, (__gnu_cxx::_Lock_policy)2>
>::deallocate(std::_Sp_counted_ptr_inplace<std::__future_base::_State_base,
std::allocator<std::__future_base::_State_base>, (__gnu_cxx::_Lock_policy)2>*,
unsigned long) (new_allocator.h:110)
==30999==    by 0x5045F2:
std::allocator_traits<std::allocator<std::_Sp_counted_ptr_inplace<std::__future_base::_State_base,
std::allocator<std::__future_base::_State_base>, (__gnu_cxx::_Lock_policy)2> >
>::deallocate(std::allocator<std::_Sp_counted_ptr_inplace<std::__future_base::_State_base,
std::allocator<std::__future_base::_State_base>, (__gnu_cxx::_Lock_policy)2>
>&, std::_Sp_counted_ptr_inplace<std::__future_base::_State_base,
std::allocator<std::__future_base::_State_base>, (__gnu_cxx::_Lock_policy)2>*,
unsigned long) (alloc_traits.h:377)
==30999==    by 0x505D85:
std::_Sp_counted_ptr_inplace<std::__future_base::_State_base,
std::allocator<std::__future_base::_State_base>,
(__gnu_cxx::_Lock_policy)2>::_M_destroy() (shared_ptr_base.h:417)
==30999==    by 0x4F2A51:
std::_Sp_counted_base<(__gnu_cxx::_Lock_policy)2>::_M_release()
(shared_ptr_base.h:161)
==30999==    by 0x4F1CC4:
std::__shared_count<(__gnu_cxx::_Lock_policy)2>::~__shared_count()
(shared_ptr_base.h:546)
==30999==    by 0x4F15F3: std::__shared_ptr<std::__future_base::_State_base,
(__gnu_cxx::_Lock_policy)2>::~__shared_ptr() (shared_ptr_base.h:781)
==30999==    by 0x4F160D:
std::shared_ptr<std::__future_base::_State_base>::~shared_ptr()
(shared_ptr.h:93)
==30999==    by 0x50B491: std::promise<void>::~promise() (future:1136)
==30999==    by 0x5071C3: HTTPP::HTTP::client::detail::Manager::~Manager()
(Manager.cpp:121)
==30999==    by 0x4F2F2B:
std::default_delete<HTTPP::HTTP::client::detail::Manager>::operator()(HTTPP::HTTP::client::detail::Manager*)
const (unique_ptr.h:67)
==30999==    by 0x4F262F: std::unique_ptr<HTTPP::HTTP::client::detail::Manager,
std::default_delete<HTTPP::HTTP::client::detail::Manager>
>::reset(HTTPP::HTTP::client::detail::Manager*) (unique_ptr.h:262)