std :: thread问题

时间：2012-05-16 12:06:05

标签： c++ multithreading c++11 valgrind std

我认为我有一个非常糟糕的概念问题。为什么我简单地用valgrind获得了很多竞争条件错误。 首先我认为这可能是一个错误，我在论坛中看到linux的更新滚动版本将解决这个问题...所以现在我已经打开了tubleweed，100％更新。 以下代码muss有一些错误：

#include <iostream>
#include <thread>

using namespace std;

class FOO
{
public:
    void do_something ()
    {
        cout<<"cout somethin\n";
    }
};

int main ()
{
    FOO foo;
    std::thread t (&FOO::do_something,&foo);
    t.join();
}

当我做的时候

valgrind --tool=drd ./oncordia

我必须尝试5次或更多次，我会收到以下错误：

==6218== drd, a thread error detector
==6218== Copyright (C) 2006-2010, and GNU GPL'd, by Bart Van Assche.
==6218== Using Valgrind-3.6.1 and LibVEX; rerun with -h for copyright info
==6218== Command: ./oncordia
==6218== 
cout somethin
==6218== Conflicting store by thread 1 at 0x05b5d050 size 8
==6218==    at 0x418E62: std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> >::~_Impl() (in /home/ezequiel/projects/oncordia/build/oncordia)
==6218==    by 0x419099: std::_Sp_destroy_inplace<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> > >::operator()(std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> >*) const (in /home/ezequiel/projects/oncordia/build/oncordia)
==6218==    by 0x418EDC: std::_Sp_counted_deleter<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> >*, std::_Sp_destroy_inplace<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> > >, std::allocator<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> > >, (__gnu_cxx::_Lock_policy)2>::_M_dispose() (shared_ptr_base.h:351)
==6218==    by 0x4180B7: std::_Sp_counted_base<(__gnu_cxx::_Lock_policy)2>::_M_release() (shared_ptr_base.h:146)
==6218==    by 0x417F62: std::__shared_count<(__gnu_cxx::_Lock_policy)2>::~__shared_count() (shared_ptr_base.h:551)
==6218==    by 0x417E99: std::__shared_ptr<std::thread::_Impl_base, (__gnu_cxx::_Lock_policy)2>::~__shared_ptr() (shared_ptr_base.h:751)
==6218==    by 0x417EB3: std::shared_ptr<std::thread::_Impl_base>::~shared_ptr() (shared_ptr.h:93)
==6218==    by 0x418037: std::thread::thread<void (FOO::*)(), FOO*>(void (FOO::*&&)(), FOO*&&) (thread:135)
==6218==    by 0x417CCB: main (main.cpp:18)
==6218== Address 0x5b5d050 is at offset 32 from 0x5b5d030. Allocation context:
==6218==    at 0x4C2AAB7: operator new(unsigned long) (in /usr/lib64/valgrind/vgpreload_drd-amd64-linux.so)
==6218==    by 0x418A5F: __gnu_cxx::new_allocator<std::_Sp_counted_ptr_inplace<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> >, std::allocator<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> > >, (__gnu_cxx::_Lock_policy)2> >::allocate(unsigned long, void const*) (new_allocator.h:92)
==6218==    by 0x418846: std::__shared_count<(__gnu_cxx::_Lock_policy)2>::__shared_count<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> >, std::allocator<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> > >, std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> >(std::_Sp_make_shared_tag, std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> >*, std::allocator<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> > > const&, std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)>&&) (shared_ptr_base.h:517)
==6218==    by 0x418775: std::__shared_ptr<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> >, (__gnu_cxx::_Lock_policy)2>::__shared_ptr<std::allocator<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> > >, std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> >(std::_Sp_make_shared_tag, std::allocator<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> > > const&, std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)>&&) (shared_ptr_base.h:986)
==6218==    by 0x4186C1: std::shared_ptr<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> > >::shared_ptr<std::allocator<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> > >, std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> >(std::_Sp_make_shared_tag, std::allocator<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> > > const&, std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)>&&) (shared_ptr.h:313)
==6218==    by 0x4185A3: std::shared_ptr<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> > > std::allocate_shared<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> >, std::allocator<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> > >, std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> >(std::allocator<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> > > const&, std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)>&&) (shared_ptr.h:531)
==6218==    by 0x418360: std::shared_ptr<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> > > std::make_shared<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> >, std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> >(std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)>&&) (shared_ptr.h:547)
==6218==    by 0x4181BF: std::shared_ptr<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> > > std::thread::_M_make_routine<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> >(std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)>&&) (thread:194)
==6218==    by 0x418005: std::thread::thread<void (FOO::*)(), FOO*>(void (FOO::*&&)(), FOO*&&) (thread:135)
==6218==    by 0x417CCB: main (main.cpp:18)
==6218== Other segment start (thread 2)
==6218==    (thread finished, call stack no longer available)
==6218== Other segment end (thread 2)
==6218==    (thread finished, call stack no longer available)
==6218== 
==6218== Conflicting store by thread 1 at 0x05b5d050 size 8
==6218==    at 0x417EC6: std::thread::_Impl_base::~_Impl_base() (in /home/ezequiel/projects/oncordia/build/oncordia)
==6218==    by 0x418E74: std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> >::~_Impl() (in /home/ezequiel/projects/oncordia/build/oncordia)
==6218==    by 0x419099: std::_Sp_destroy_inplace<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> > >::operator()(std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> >*) const (in /home/ezequiel/projects/oncordia/build/oncordia)
==6218==    by 0x418EDC: std::_Sp_counted_deleter<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> >*, std::_Sp_destroy_inplace<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> > >, std::allocator<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> > >, (__gnu_cxx::_Lock_policy)2>::_M_dispose() (shared_ptr_base.h:351)
==6218==    by 0x4180B7: std::_Sp_counted_base<(__gnu_cxx::_Lock_policy)2>::_M_release() (shared_ptr_base.h:146)
==6218==    by 0x417F62: std::__shared_count<(__gnu_cxx::_Lock_policy)2>::~__shared_count() (shared_ptr_base.h:551)
==6218==    by 0x417E99: std::__shared_ptr<std::thread::_Impl_base, (__gnu_cxx::_Lock_policy)2>::~__shared_ptr() (shared_ptr_base.h:751)
==6218==    by 0x417EB3: std::shared_ptr<std::thread::_Impl_base>::~shared_ptr() (shared_ptr.h:93)
==6218==    by 0x418037: std::thread::thread<void (FOO::*)(), FOO*>(void (FOO::*&&)(), FOO*&&) (thread:135)
==6218==    by 0x417CCB: main (main.cpp:18)
==6218== Address 0x5b5d050 is at offset 32 from 0x5b5d030. Allocation context:
==6218==    at 0x4C2AAB7: operator new(unsigned long) (in /usr/lib64/valgrind/vgpreload_drd-amd64-linux.so)
==6218==    by 0x418A5F: __gnu_cxx::new_allocator<std::_Sp_counted_ptr_inplace<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> >, std::allocator<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> > >, (__gnu_cxx::_Lock_policy)2> >::allocate(unsigned long, void const*) (new_allocator.h:92)
==6218==    by 0x418846: std::__shared_count<(__gnu_cxx::_Lock_policy)2>::__shared_count<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> >, std::allocator<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> > >, std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> >(std::_Sp_make_shared_tag, std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> >*, std::allocator<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> > > const&, std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)>&&) (shared_ptr_base.h:517)
==6218==    by 0x418775: std::__shared_ptr<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> >, (__gnu_cxx::_Lock_policy)2>::__shared_ptr<std::allocator<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> > >, std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> >(std::_Sp_make_shared_tag, std::allocator<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> > > const&, std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)>&&) (shared_ptr_base.h:986)
==6218==    by 0x4186C1: std::shared_ptr<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> > >::shared_ptr<std::allocator<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> > >, std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> >(std::_Sp_make_shared_tag, std::allocator<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> > > const&, std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)>&&) (shared_ptr.h:313)
==6218==    by 0x4185A3: std::shared_ptr<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> > > std::allocate_shared<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> >, std::allocator<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> > >, std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> >(std::allocator<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> > > const&, std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)>&&) (shared_ptr.h:531)
==6218==    by 0x418360: std::shared_ptr<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> > > std::make_shared<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> >, std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> >(std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)>&&) (shared_ptr.h:547)
==6218==    by 0x4181BF: std::shared_ptr<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> > > std::thread::_M_make_routine<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> >(std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)>&&) (thread:194)
==6218==    by 0x418005: std::thread::thread<void (FOO::*)(), FOO*>(void (FOO::*&&)(), FOO*&&) (thread:135)
==6218==    by 0x417CCB: main (main.cpp:18)
==6218== Other segment start (thread 2)
==6218==    (thread finished, call stack no longer available)
==6218== Other segment end (thread 2)
==6218==    (thread finished, call stack no longer available)
==6218== 
==6218== Conflicting load by thread 1 at 0x05b5d060 size 8
==6218==    at 0x417F4C: std::__shared_count<(__gnu_cxx::_Lock_policy)2>::~__shared_count() (shared_ptr_base.h:550)
==6218==    by 0x417E99: std::__shared_ptr<std::thread::_Impl_base, (__gnu_cxx::_Lock_policy)2>::~__shared_ptr() (shared_ptr_base.h:751)
==6218==    by 0x417EB3: std::shared_ptr<std::thread::_Impl_base>::~shared_ptr() (shared_ptr.h:93)
==6218==    by 0x417EDC: std::thread::_Impl_base::~_Impl_base() (in /home/ezequiel/projects/oncordia/build/oncordia)
==6218==    by 0x418E74: std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> >::~_Impl() (in /home/ezequiel/projects/oncordia/build/oncordia)
==6218==    by 0x419099: std::_Sp_destroy_inplace<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> > >::operator()(std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> >*) const (in /home/ezequiel/projects/oncordia/build/oncordia)
==6218==    by 0x418EDC: std::_Sp_counted_deleter<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> >*, std::_Sp_destroy_inplace<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> > >, std::allocator<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> > >, (__gnu_cxx::_Lock_policy)2>::_M_dispose() (shared_ptr_base.h:351)
==6218==    by 0x4180B7: std::_Sp_counted_base<(__gnu_cxx::_Lock_policy)2>::_M_release() (shared_ptr_base.h:146)
==6218==    by 0x417F62: std::__shared_count<(__gnu_cxx::_Lock_policy)2>::~__shared_count() (shared_ptr_base.h:551)
==6218==    by 0x417E99: std::__shared_ptr<std::thread::_Impl_base, (__gnu_cxx::_Lock_policy)2>::~__shared_ptr() (shared_ptr_base.h:751)
==6218==    by 0x417EB3: std::shared_ptr<std::thread::_Impl_base>::~shared_ptr() (shared_ptr.h:93)
==6218==    by 0x418037: std::thread::thread<void (FOO::*)(), FOO*>(void (FOO::*&&)(), FOO*&&) (thread:135)
==6218== Address 0x5b5d060 is at offset 48 from 0x5b5d030. Allocation context:
==6218==    at 0x4C2AAB7: operator new(unsigned long) (in /usr/lib64/valgrind/vgpreload_drd-amd64-linux.so)
==6218==    by 0x418A5F: __gnu_cxx::new_allocator<std::_Sp_counted_ptr_inplace<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> >, std::allocator<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> > >, (__gnu_cxx::_Lock_policy)2> >::allocate(unsigned long, void const*) (new_allocator.h:92)
==6218==    by 0x418846: std::__shared_count<(__gnu_cxx::_Lock_policy)2>::__shared_count<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> >, std::allocator<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> > >, std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> >(std::_Sp_make_shared_tag, std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> >*, std::allocator<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> > > const&, std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)>&&) (shared_ptr_base.h:517)
==6218==    by 0x418775: std::__shared_ptr<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> >, (__gnu_cxx::_Lock_policy)2>::__shared_ptr<std::allocator<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> > >, std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> >(std::_Sp_make_shared_tag, std::allocator<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> > > const&, std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)>&&) (shared_ptr_base.h:986)
==6218==    by 0x4186C1: std::shared_ptr<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> > >::shared_ptr<std::allocator<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> > >, std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> >(std::_Sp_make_shared_tag, std::allocator<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> > > const&, std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)>&&) (shared_ptr.h:313)
==6218==    by 0x4185A3: std::shared_ptr<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> > > std::allocate_shared<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> >, std::allocator<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> > >, std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> >(std::allocator<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> > > const&, std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)>&&) (shared_ptr.h:531)
==6218==    by 0x418360: std::shared_ptr<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> > > std::make_shared<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> >, std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> >(std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)>&&) (shared_ptr.h:547)
==6218==    by 0x4181BF: std::shared_ptr<std::thread::_Impl<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> > > std::thread::_M_make_routine<std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)> >(std::_Bind_result<void, std::_Mem_fn<void (FOO::*)()> ()(FOO*)>&&) (thread:194)
==6218==    by 0x418005: std::thread::thread<void (FOO::*)(), FOO*>(void (FOO::*&&)(), FOO*&&) (thread:135)
==6218==    by 0x417CCB: main (main.cpp:18)
==6218== Other segment start (thread 2)
==6218==    (thread finished, call stack no longer available)
==6218== Other segment end (thread 2)
==6218==    (thread finished, call stack no longer available)
==6218== 
==6218== 
==6218== For counts of detected and suppressed errors, rerun with: -v

谢谢！

2 个答案:

答案 0 :(得分：10)

阅读精彩的手册：http://gcc.gnu.org/onlinedocs/libstdc++/manual/debug.html#debug.races

代码没问题，valgrind不理解我们在std::shared_ptr内使用的原子操作，并错误地将它们报告为种族。

答案 1 :(得分：0)

cout是一种资源，应该是互斥的（竞争条件，如果＆gt; do_something（1）或cout的其他用途）

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