使用 boost syslog 和 cpp-netlib 时出现分段错误

Question

在源码中加入boost syslog后，cpp-netlib库出现segmentation fault。我能够准备最少的工作代码片段来重现该问题。

#include <boost/network/protocol/http/client.hpp>
#include <boost/log/utility/setup/file.hpp>
#include <boost/log/sinks/syslog_backend.hpp>

#include <iostream>

using namespace boost::network;
using namespace boost::network::http;

namespace sinks = boost::log::sinks;

int main()
{
    client::request request_("http://www.boost.org/");
    client client_;
    client::response response_ = client_.get(request_);
    std::string body_ = body(response_);
    std::cout << "body: " << body_;
    using syslog_sinkT = sinks::synchronous_sink <sinks::syslog_backend>;
    boost::shared_ptr <sinks::syslog_backend> backend = boost::make_shared <sinks::syslog_backend> ();
    boost::shared_ptr<syslog_sinkT> sink = boost::make_shared <syslog_sinkT> (backend);
}

当最后 2 行被注释时，分段错误消失，一切正常。

gdb 堆栈跟踪（大约，可能会有所不同）：

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0xf7c29b40 (LWP 19874)]
0x00000000 in ?? ()
(gdb) where
#0  0x00000000 in ?? ()
#1  0x083c376c in boost::asio::detail::task_io_service_operation::complete (bytes_transferred=260, ec=..., owner=..., 
    this=0xf6900710)
    at /home/kostidov/prj/third_party-master/boost/boost_1_60_0/__public__/v0/Linux-libc6/include/boost/asio/detail/task_io_service_o$
eration.hpp:38
#2  boost::asio::detail::task_io_service::do_run_one (ec=..., this_thread=..., lock=..., this=<optimized out>)
    at /home/kostidov/prj/third_party-master/boost/boost_1_60_0/__public__/v0/Linux-libc6/include/boost/asio/detail/impl/task_io_serv$
ce.ipp:372
#3  boost::asio::detail::task_io_service::run (ec=..., this=0x84ea280)
    at /home/kostidov/prj/third_party-master/boost/boost_1_60_0/__public__/v0/Linux-libc6/include/boost/asio/detail/impl/task_io_serv$
ce.ipp:149
#4  boost::asio::io_service::run (this=0x84e9a94)
    at /home/kostidov/prj/third_party-master/boost/boost_1_60_0/__public__/v0/Linux-libc6/include/boost/asio/impl/io_service.ipp:59
#5  0x083b5766 in boost::_mfi::mf0<unsigned int, boost::asio::io_service>::operator() (p=<optimized out>, this=<optimized out>)
    at /home/kostidov/prj/third_party-master/boost/boost_1_60_0/__public__/v0/Linux-libc6/include/boost/bind/mem_fn_template.hpp:49
#6  boost::_bi::list1<boost::_bi::value<boost::asio::io_service*> >::operator()<unsigned int, boost::_mfi::mf0<unsigned int, boost::a$
io::io_service>, boost::_bi::list0> (a=<synthetic pointer>, f=..., this=0x84ea94c)
    at /home/kostidov/prj/third_party-master/boost/boost_1_60_0/__public__/v0/Linux-libc6/include/boost/bind/bind.hpp:249
#7  boost::_bi::bind_t<unsigned int, boost::_mfi::mf0<unsigned int, boost::asio::io_service>, boost::_bi::list1<boost::_bi::value<boo$
t::asio::io_service*> > >::operator() (this=0x84ea944)
    at /home/kostidov/prj/third_party-master/boost/boost_1_60_0/__public__/v0/Linux-libc6/include/boost/bind/bind.hpp:1222
#8  boost::detail::thread_data<boost::_bi::bind_t<unsigned int, boost::_mfi::mf0<unsigned int, boost::asio::io_service>, boost::_bi::$
ist1<boost::_bi::value<boost::asio::io_service*> > > >::run (this=0x84ea828)
    at /home/kostidov/prj/third_party-master/boost/boost_1_60_0/__public__/v0/Linux-libc6/include/boost/thread/detail/thread.hpp:116
#9  0x0840a4f8 in boost::(anonymous namespace)::thread_proxy (param=0x84ea828) at libs/thread/src/pthread/thread.cpp:167
#10 0xf7de1f70 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#11 0xf7d18bee in clone () from /lib/i386-linux-gnu/libc.so.6

Ubuntu 14.04 上的 cpp-netlib 0.11.2 和两个提升版本 1_58_0 和 1_60_0 上存在问题。 Boost、cpp-netlib 和我的应用程序是使用 -std=c++11.

编译的

注意 1. 在到达 syslog_backend 创建之前，cpp-netlib 内部出现分段错误。只有最后 2 行的存在才能保证 SIGSEGV 的再现。

注 2。仅使用 syslog_backend 进行复制。任何其他日志记录目标（文件、控制台）都可以正常工作。我最好的想法是问题可能出在静态变量初始化期间的 boost 内部，但我没有关于这个版本的证据。有什么建议吗？

Answer 1

似乎我在构建 boost 和 cpp-netlib 时使用了太多编译选项。我再次为 boost 和 cpp-netlib 准备了新的构建，但这次我使用了尽可能少的附加选项。而且效果很好。

编辑：我找到了导致错误的关键。它是 BOOST_ASIO_ENABLE_HANDLER_TRACKING 它是在 boost 编译期间定义的，但在编译 cpp-netlib 和我的应用程序期间没有定义。

https://svn.boost.org/trac/boost/ticket/11945

使用 boost syslog 和 cpp-netlib 时出现分段错误

Segmentation fault on using boost syslog and cpp-netlib

boost

segmentation-fault

syslog

boost-log

cpp-netlib