C++ Boost read_json 崩溃，我有#define BOOST_SPIRIT_THREADSAFE

Question

最近其他人升级了我们的 boost 库，现在我在大量调用 read_json 函数时看到这个 coredump。以前从未见过这个。而且我在代码中有#define BOOST_SPIRIT_THREADSAFE，这就是为什么以前没有发生过这种情况。真的需要帮助!谢谢!

程序终止，信号 11，段错误。

    #0  0x00007f062ce0d094 in std::mem_fun1_t<int, boost::spirit::classic::impl::grammar_helper_base<boost::spirit::classic::grammar<boost::property_tree::json_parser::json_grammar<boost::property_tree::basic_ptree<std::string, std::string, std::less<std::string> > >, boost::spirit::classic::parser_context<boost::spirit::classic::nil_t> > >, boost::spirit::classic::grammar<boost::property_tree::json_parser::json_grammar<boost::property_tree::basic_ptree<std::string, std::string, std::less<std::string> > >, boost::spirit::classic::parser_context<boost::spirit::classic::nil_t> >*>::operator() (this=0x7f06120f4c90, __p=0x7f05f813faa0, __x=0x7f06120f4df0) at /usr/lib/gcc/x86_64-spcdn-linux-gnu/4.5.2/../../../../include/c++/4.5.2/bits/stl_function.h:605
            in /usr/lib/gcc/x86_64-spcdn-linux-gnu/4.5.2/../../../../include/c++/4.5.2/bits/stl_function.h
    #0  0x00007f062ce0d094 in std::mem_fun1_t<int, boost::spirit::classic::impl::grammar_helper_base<boost::spirit::classic::grammar<boost::property_tree::json_parser::json_grammar<boost::property_tree::basic_ptree<std::string, std::string, std::less<std::string> > >, boost::spirit::classic::parser_context<boost::spirit::classic::nil_t> > >, boost::spirit::classic::grammar<boost::property_tree::json_parser::json_grammar<boost::property_tree::basic_ptree<std::string, std::string, std::less<std::string> > >, boost::spirit::classic::parser_context<boost::spirit::classic::nil_t> >*>::operator() (this=0x7f06120f4c90, __p=0x7f05f813faa0, __x=0x7f06120f4df0) at /usr/lib/gcc/x86_64-spcdn-linux-gnu/4.5.2/../../../../include/c++/4.5.2/bits/stl_function.h:605
    #1  0x00007f062ce0c66e in std::binder2nd<std::mem_fun1_t<int, boost::spirit::classic::impl::grammar_helper_base<boost::spirit::classic::grammar<boost::property_tree::json_parser::json_grammar<boost::property_tree::basic_ptree<std::string, std::string, std::less<std::string> > >, boost::spirit::classic::parser_context<boost::spirit::classic::nil_t> > >, boost::spirit::classic::grammar<boost::property_tree::json_parser::json_grammar<boost::property_tree::basic_ptree<std::string, std::string, std::less<std::string> > >, boost::spirit::classic::parser_context<boost::spirit::classic::nil_t> >*> >::operator() (this=0x7f06120f4c90, __x=@0x7f06001446e0) at /usr/lib/gcc/x86_64-spcdn-linux-gnu/4.5.2/../../../../include/c++/4.5.2/backward/binders.h:154
    #2  0x00007f062ce0b87e in std::for_each<std::reverse_iterator<__gnu_cxx::__normal_iterator<boost::spirit::classic::impl::grammar_helper_base<boost::spirit::classic::grammar<boost::property_tree::json_parser::json_grammar<boost::property_tree::basic_ptree<std::string, std::string, std::less<std::string> > >, boost::spirit::classic::parser_context<boost::spirit::classic::nil_t> > >**, std::vector<boost::spirit::classic::impl::grammar_helper_base<boost::spirit::classic::grammar<boost::property_tree::json_parser::json_grammar<boost::property_tree::basic_ptree<std::string, std::string, std::less<std::string> > >, boost::spirit::classic::parser_context<boost::spirit::classic::nil_t> > >*, std::allocator<boost::spirit::classic::impl::grammar_helper_base<boost::spirit::classic::grammar<boost::property_tree::json_parser::json_grammar<boost::property_tree::basic_ptree<std::string, std::string, std::less<std::string> > >, boost::spirit::classic::parser_context<boost::spirit::classic::nil_t> > >*> > > >, std::binder2nd<std::mem_fun1_t<int, boost::spirit::classic::impl::grammar_helper_base<boost::spirit::classic::grammar<boost::property_tree::json_parser::json_grammar<boost::property_tree::basic_ptree<std::string, std::string, std::less<std::string> > >, boost::spirit::classic::parser_context<boost::spirit::classic::nil_t> > >, boost::spirit::classic::grammar<boost::property_tree::json_parser::json_grammar<boost::property_tree::basic_ptree<std::string, std::string, std::less<std::string> > >, boost::spirit::classic::parser_context<boost::spirit::classic::nil_t> >*> > > (__first=..., __last=..., __f=...) at /usr/lib/gcc/x86_64-spcdn-linux-gnu/4.5.2/../../../../include/c++/4.5.2/bits/stl_algo.h:4185
    #3  0x00007f062ce0aa88 in boost::spirit::classic::impl::grammar_destruct<boost::spirit::classic::grammar<boost::property_tree::json_parser::json_grammar<boost::property_tree::basic_ptree<std::string, std::string, std::less<std::string> > >, boost::spirit::classic::parser_context<boost::spirit::classic::nil_t> > > (self=0x7f06120f4df0) at /usr/include/boost/spirit/home/classic/core/non_terminal/impl/grammar.ipp:324
    #4  0x00007f062ce09c5f in boost::spirit::classic::grammar<boost::property_tree::json_parser::json_grammar<boost::property_tree::basic_ptree<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >, boost::spirit::classic::parser_context<boost::spirit::classic::nil_t> >::~grammar (this=0x7f06120f4df0, __in_chrg=<optimized out>) at /usr/include/boost/spirit/home/classic/core/non_terminal/grammar.hpp:52
    #5  0x00007f062ce093f7 in boost::property_tree::json_parser::json_grammar<boost::property_tree::basic_ptree<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >::~json_grammar (this=0x7f06120f4df0, __in_chrg=<optimized out>) at /usr/include/boost/property_tree/detail/json_parser_read.hpp:162
    #6  0x00007f062ce0987f in boost::property_tree::json_parser::read_json_internal<boost::property_tree::basic_ptree<std::string, std::string, std::less<std::string> > > (stream=..., pt=..., filename="") at /usr/include/boost/property_tree/detail/json_parser_read.hpp:310
    #7  0x00007f062ce08eb6 in boost::property_tree::json_parser::read_json<boost::property_tree::basic_ptree<std::string, std::string, std::less<std::string> > > (stream=..., pt=...) at /usr/include/boost/property_tree/json_parser.hpp:45

Answer 1

在任何包含 json_parser.hpp 或 Spirit 的地方，都必须定义 BOOST_SPIRIT_THREADSAFE。全局定义它是最安全的，以防 boost/yourApp 的另一部分在您不知情的情况下使用 Spirit。

对于任何未定义的包含，Sprit 烦人地在 grammar.ipp 中创建一个静态变量，该变量将在 Spirit 的所有实例之间共享。你的 grammar_destruct 错误是因为 Spirit 在你的一个模块中缺少这个定义。