Very randomly and sporadically (I have seen it twice so far in my
couple weeks long of using this so far) I get a crash on line 71 in
file timeutil.c because the this pointer is null (thus t_ is pointing
to invalid memory 0x00000004).
This is on Windows using the built in server.
Here is the callstack:
> Zombjas.wt.exe!Wt::Time::operator-(const Wt::Time & other={...}) Line
> 71 + 0xa bytes C++
Zombjas.wt.exe!Wt::WebController::expireSessions() Line 163 + 0x13
bytes C++
Zombjas.wt.exe!Wt::WebController::handleRequest(Wt::WebRequest *
request=0x00ffd7d0, const Wt::EntryPoint * ep=0x00fea030) Line
425 C++
Zombjas.wt.exe!http::server::WtReply::consumeRequestBody(const char
* begin=0x00fe5e09, const char * end=0x00fe5e09, bool
endOfRequest=true) Line 43 C++
Zombjas.wt.exe!http::server::RequestParser::parseBody(http::server::Request
& req={...}, boost::shared_ptr<http::server::Reply> reply={...}, const
char * & begin=0x00fe5e09, const char * end=0x00fe5e09) Line 120 +
0x26 bytes C++
Zombjas.wt.exe!http::server::Connection::handleReadBody() Line 131
+ 0x50 bytes C++
Zombjas.wt.exe!http::server::Connection::handleReadRequest0() Line
96 + 0x8 bytes C++
Zombjas.wt.exe!http::server::Connection::handleReadRequest(const
boost::system::error_code & e={...}, unsigned int
bytes_transferred=609) Line 121 C++
Zombjas.wt.exe!boost::_mfi::mf2<void,http::server::Connection,boost::system::error_code
const &,unsigned
int>::call<boost::shared_ptr<http::server::Connection>,boost::system::error_code
const ,unsigned int>(boost::shared_ptr<http::server::Connection> &
u={...}, const void * __formal=0x01d0fcbc, const
boost::system::error_code & b1={...}, unsigned int & b2=609) Line 265
+ 0x27 bytes C++
Zombjas.wt.exe!boost::_mfi::mf2<void,http::server::Connection,boost::system::error_code
const &,unsigned
int>::operator()<boost::shared_ptr<http::server::Connection>
>(boost::shared_ptr<http::server::Connection> & u={...}, const
boost::system::error_code & a1={...}, unsigned int a2=609) Line
280 C++
Zombjas.wt.exe!boost::_bi::list3<boost::_bi::value<boost::shared_ptr<http::server::Connection>
>,boost::arg<1>,boost::arg<2>
>::operator()<boost::_mfi::mf2<void,http::server::Connection,boost::system::error_code
const &,unsigned int>,boost::_bi::list2<boost::system::error_code
&,unsigned int &> >(boost::_bi::type<void> __formal={...},
boost::_mfi::mf2<void,http::server::Connection,boost::system::error_code
const &,unsigned int> & f={...},
boost::_bi::list2<boost::system::error_code &,unsigned int &> &
a={...}, boost::_bi::type<void> __formal={...}) Line 386 C++
Zombjas.wt.exe!boost::_bi::bind_t<void,boost::_mfi::mf2<void,http::server::Connection,boost::system::error_code
const &,unsigned
int>,boost::_bi::list3<boost::_bi::value<boost::shared_ptr<http::server::Connection>
>,boost::arg<1>,boost::arg<2> >
>::operator()<boost::system::error_code,unsigned
int>(boost::system::error_code & a1={...}, unsigned int & a2=609)
Line 62 C++
Zombjas.wt.exe!boost::asio::detail::binder2<boost::_bi::bind_t<void,boost::_mfi::mf2<void,http::server::Connection,boost::system::error_code
const &,unsigned
int>,boost::_bi::list3<boost::_bi::value<boost::shared_ptr<http::server::Connection>
>,boost::arg<1>,boost::arg<2> > >,boost::system::error_code,unsigned
int>::operator()() Line 97 C++
Zombjas.wt.exe!boost::asio::asio_handler_invoke<boost::asio::detail::binder2<boost::_bi::bind_t<void,boost::_mfi::mf2<void,http::server::Connection,boost::system::error_code
const &,unsigned
int>,boost::_bi::list3<boost::_bi::value<boost::shared_ptr<http::server::Connection>
>,boost::arg<1>,boost::arg<2> > >,boost::system::error_code,unsigned
int>
>(boost::asio::detail::binder2<boost::_bi::bind_t<void,boost::_mfi::mf2<void,http::server::Connection,boost::system::error_code
const &,unsigned
int>,boost::_bi::list3<boost::_bi::value<boost::shared_ptr<http::server::Connection>
>,boost::arg<1>,boost::arg<2> > >,boost::system::error_code,unsigned
int> function={...}, ...) Line 63 C++
Zombjas.wt.exe!boost_asio_handler_invoke_helpers::invoke<boost::asio::detail::binder2<boost::_bi::bind_t<void,boost::_mfi::mf2<void,http::server::Connection,boost::system::error_code
const &,unsigned
int>,boost::_bi::list3<boost::_bi::value<boost::shared_ptr<http::server::Connection>
>,boost::arg<1>,boost::arg<2> > >,boost::system::error_code,unsigned
int>,boost::_bi::bind_t<void,boost::_mfi::mf2<void,http::server::Connection,boost::system::error_code
const &,unsigned
int>,boost::_bi::list3<boost::_bi::value<boost::shared_ptr<http::server::Connection>
>,boost::arg<1>,boost::arg<2> > > >(const
boost::asio::detail::binder2<boost::_bi::bind_t<void,boost::_mfi::mf2<void,http::server::Connection,boost::system::error_code
const &,unsigned
int>,boost::_bi::list3<boost::_bi::value<boost::shared_ptr<http::server::Connection>
>,boost::arg<1>,boost::arg<2> > >,boost::system::error_code,unsigned
int> & function={...},
boost::_bi::bind_t<void,boost::_mfi::mf2<void,http::server::Connection,boost::system::error_code
const &,unsigned
int>,boost::_bi::list3<boost::_bi::value<boost::shared_ptr<http::server::Connection>
>,boost::arg<1>,boost::arg<2> > > * context=0x01d0fd24) Line 39 +
0x1d bytes C++
Zombjas.wt.exe!boost::asio::detail::win_iocp_socket_service<boost::asio::ip::tcp>::receive_operation<boost::asio::mutable_buffers_1,boost::_bi::bind_t<void,boost::_mfi::mf2<void,http::server::Connection,boost::system::error_code
const &,unsigned
int>,boost::_bi::list3<boost::_bi::value<boost::shared_ptr<http::server::Connection>
>,boost::arg<1>,boost::arg<2> > >
>::do_completion_impl(boost::asio::detail::win_iocp_io_service::operation
* op=0x01002b98, unsigned long last_error=0, unsigned int
bytes_transferred=609) Line 1342 + 0x32 bytes C++
Zombjas.wt.exe!boost::asio::detail::win_iocp_io_service::operation::do_completion(unsigned
long last_error=0, unsigned int bytes_transferred=609) Line 77 + 0x16
bytes C++
Zombjas.wt.exe!boost::asio::detail::win_iocp_io_service::do_one(bool
block=true, boost::system::error_code & ec={...}) Line 512 C++
Zombjas.wt.exe!boost::asio::detail::win_iocp_io_service::run(boost::system::error_code
& ec={...}) Line 186 + 0xe bytes C++
Zombjas.wt.exe!boost::asio::io_service::run() Line 58 + 0xf bytes
C++
Zombjas.wt.exe!http::server::Server::run() Line 193 C++
Zombjas.wt.exe!boost::_mfi::mf0<void,http::server::Server>::operator()(http::server::Server
* p=0x00fed118) Line 49 + 0xc bytes C++
Zombjas.wt.exe!boost::_bi::list1<boost::_bi::value<http::server::Server
*>
>::operator()<boost::_mfi::mf0<void,http::server::Server>,boost::_bi::list0>(boost::_bi::type<void>
__formal={...}, boost::_mfi::mf0<void,http::server::Server> & f={...},
boost::_bi::list0 & a={...}, boost::_bi::type<void> __formal={...})
Line 247 C++
Zombjas.wt.exe!boost::_bi::bind_t<void,boost::_mfi::mf0<void,http::server::Server>,boost::_bi::list1<boost::_bi::value<http::server::Server
*> > >::operator()() Line 21 C++
Zombjas.wt.exe!boost::detail::thread_data<boost::_bi::bind_t<void,boost::_mfi::mf0<void,http::server::Server>,boost::_bi::list1<boost::_bi::value<http::server::Server
*> > > >::run() Line 57 C++
Zombjas.wt.exe!boost::`anonymous
namespace'::thread_start_function(void * param=0x0017fa08) Line 167 +
0xd bytes C++
msvcr80d.dll!_callthreadstartex() Line 348 + 0xf bytes C
msvcr80d.dll!_threadstartex(void * ptd=0x00fea830) Line 331 C
In WebController::expireSessions, here are the local variables at that
point in time (it seems the expire_ var in session was never set?):
diff 600000 int
- session 0x010136b0 {mutex_={...} type_=Application favicon_=<Bad
Ptr> ...} Wt::WebSession *
+ mutex_ {...} boost::mutex
+ threadHandler_ {cleanup={...}
} boost::thread_specific_ptr<Wt::WebSession::Handler>
type_ Application Wt::ApplicationType
+ favicon_ <Bad
Ptr> std::basic_string<char,std::char_traits<char>,std::allocator<char>
>
state_ 18614203 Wt::WebSession::State
+ sessionId_ <Bad
Ptr> std::basic_string<char,std::char_traits<char>,std::allocator<char>
>
+ controller_ 0x01062a68 {conf_={...} stream_=0xcdcdcdcc
singleSessionId_=" @" ...} Wt::WebController *
+ renderer_ {session_={...} visibleOnly_=false
twoPhaseThreshold_=0
...} Wt::WebRenderer
applicationName_ <Bad
Ptr> std::basic_string<char,std::char_traits<char>,std::allocator<char>
>
bookmarkUrl_ <Bad
Ptr> std::basic_string<char,std::char_traits<char>,std::allocator<char>
>
+ baseUrl_ ""
std::basic_string<char,std::char_traits<char>,std::allocator<char>
>
+ absoluteBaseUrl_ <Bad
Ptr> std::basic_string<char,std::char_traits<char>,std::allocator<char>
>
applicationUrl_ "€9"
std::basic_string<char,std::char_traits<char>,std::allocator<char>
>
deploymentPath_ <Bad
Ptr> std::basic_string<char,std::char_traits<char>,std::allocator<char>
>
+ redirect_ ""
std::basic_string<char,std::char_traits<char>,std::allocator<char>
>
+ pollResponse_ 0xcdcdcd00 Wt::WebResponse *
updatesPending_ false bool
progressiveBoot_ false bool
+ expire_ {t_=0x00000004 } Wt::Time
+ recursiveEvent_ {...} boost::condition_variable_any
+ embeddedEnv_ {session_=0x01013e10 doesAjax_=false
doesCookies_=false ...} Wt::WEnvironment
+ env_ 0x00000000 {session_=??? doesAjax_=??? doesCookies_=???
...} Wt::WEnvironment *
+ app_ 0x00000004 {requestTooLarge_={...} session_=???
title_={...}
...} Wt::WApplication *
debug_ false bool
handlers_ [4294961119](...,...)
std::vector<Wt::WebSession::Handler
*,std::allocator<Wt::WebSession::Handler *> >
emitStack_ [0]() std::vector<Wt::WObject
*,std::allocator<Wt::WObject *> >
+ recursiveEventLoop_ 0x00000000 {lock_={...} prevHandler_=???
session_=??? ...} Wt::WebSession::Handler *
+ i ("RU6xllBxGoqrckA5",0x010136b0 {mutex_={...}
type_=Application
favicon_=<Bad Ptr>
...})
std::_Tree<std::_Tmap_traits<std::basic_string<char,std::char_traits<char>,std::allocator<char>
>,Wt::WebSession
*,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char>
> >,std::allocator<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char>
> const ,Wt::WebSession *> >,0> >::iterator
+ this 0x0036e2c0 {conf_={...} stream_=0x0036e2b8
singleSessionId_=""
...} Wt::WebController * const
+ now {t_=0x00ff7868 } Wt::Time
toKill [0]() std::vector<Wt::WebSession
*,std::allocator<Wt::WebSession *> >
+ sessionsLock {m=0x0036e328 is_locked=true
} boost::unique_lock<boost::recursive_mutex>
Any thoughts? Pretty hard for me to reproduce, thus debug...
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