This helgrind example tests a slightly adapted version of 'Hello Wt' using Qt Creator under Ubuntu for possible problems.

Download the Qt Creator project 'CppHelgrindExample3' (zip)

The original version was adapted to let the program quit. So, I added a Wt::WPushButton that calls std::exit.

Technical facts

Application type(s)

Web application

Operating system(s) or programming environment(s)

Lubuntu 11.04 (natty)

IDE(s):

Qt Creator 2.0.1

Project type:

Console application

C++ standard:

C++98

Compiler(s):

G++ 4.5.2

Libraries used:

Boost: version 1.42
STL: GNU ISO C++ Library, version 4.5.2
Wt: version 3.1.9

Qt project file: CppHelgrindExample3.pro


#-------------------------------------------------

#

# Project created by QtCreator 2010-11-18T12:10:20

#

#-------------------------------------------------

QT       += core

QT       -= gui

TARGET = CppHelgrindExample3

LIBS += -lwt -lwthttp

CONFIG   += console

CONFIG   -= app_bundle

TEMPLATE = app

SOURCES += main.cpp

main.cpp


/*

 * Copyright (C) 2008 Emweb bvba, Heverlee, Belgium.

 *

 * See the LICENSE file for terms of use.

 */



#include <Wt/WApplication>

#include <Wt/WBreak>

#include <Wt/WContainerWidget>

#include <Wt/WLineEdit>

#include <Wt/WPushButton>

#include <Wt/WText>



#include <boost/version.hpp>



using namespace Wt;



/*

 * A simple hello world application class which demonstrates how to react

 * to events, read input, and give feed-back.

 */

class HelloApplication : public WApplication

{

public:

  HelloApplication(const WEnvironment& env);



private:

  WLineEdit *nameEdit_;

  WText *greeting_;



  void greet();

  void quit(); //Added by RJCB

};



/*

 * The env argument contains information about the new session, and

 * the initial request. It must be passed to the WApplication

 * constructor so it is typically also an argument for your custom

 * application constructor.

*/

HelloApplication::HelloApplication(const WEnvironment& env)

  : WApplication(env)

{

  setTitle("Hello world");                               // application title



  root()->addWidget(new WText("Your name, please ? "));  // show some text

  nameEdit_ = new WLineEdit(root());                     // allow text input

  nameEdit_->setFocus();                                 // give focus



  WPushButton *b = new WPushButton("Greet me.", root()); // create a button

  b->setMargin(5, Left);                                 // add 5 pixels margin



  root()->addWidget(new WBreak());                       // insert a line break



  greeting_ = new WText(root());                         // empty text





  root()->addWidget(new WBreak());                         // RJCB

  WPushButton * const q = new WPushButton("Quit", root()); // RJCB

  q->clicked().connect(this, &HelloApplication::quit);     // RJCB



  /*

   * Connect signals with slots

   *

   * - simple Wt-way

   */

  b->clicked().connect(this, &HelloApplication::greet);



  /*

   * - using an arbitrary function object (binding values with boost::bind())

   */

  nameEdit_->enterPressed().connect

    (boost::bind(&HelloApplication::greet, this));

}



void HelloApplication::greet()

{

  /*

   * Update the text, using text input into the nameEdit_ field.

   */

  greeting_->setText("Hello there, " + nameEdit_->text());

}



//Method added by RJCB

void HelloApplication::quit()

{

  std::exit(0);

}



WApplication *createApplication(const WEnvironment& env)

{

  /*

   * You could read information from the environment to decide whether

   * the user has permission to start a new application

   */

  return new HelloApplication(env);

}



int main(int argc, char **argv)

{

  /*

   * Your main method may set up some shared resources, but should then

   * start the server application (FastCGI or httpd) that starts listening

   * for requests, and handles all of the application life cycles.

   *

   * The last argument to WRun specifies the function that will instantiate

   * new application objects. That function is executed when a new user surfs

   * to the Wt application, and after the library has negotiated browser

   * support. The function should return a newly instantiated application

   * object.

   */

  return WRun(argc, argv, &createApplication);

}

helgrind.sh


#!/bin/sh

valgrind --tool=helgrind --log-file=helgrind.txt ../CppHelgrindExample3-build-desktop/./CppHelgrindExample3 --docroot=. --http-address=0.0.0.0 --http-port=8080

memcheck.sh


#!/bin/sh

valgrind --leak-check=full -v --show-reachable=yes --log-file=memcheck.txt ../CppHelgrindExample3-build-desktop/./CppHelgrindExample3 --docroot=. --http-address=0.0.0.0 --http-port=8080

helgrind.txt

helgrind.txt is the output file created by helgrind:


==17884== Helgrind, a thread error detector

==17884== Copyright (C) 2007-2010, and GNU GPL'd, by OpenWorks LLP et al.

==17884== Using Valgrind-3.6.1 and LibVEX; rerun with -h for copyright info

==17884== Command: ../CppHelgrindExample3-build-desktop/./CppHelgrindExample3 --docroot=. --http-address=0.0.0.0 --http-port=8080

==17884== Parent PID: 17883

==17884== 

==17884== Thread #3 was created

==17884==    at 0x4A9A728: clone (clone.S:111)

==17884==    by 0x48894B5: pthread_create@@GLIBC_2.1 (createthread.c:256)

==17884==    by 0x4026E2D: pthread_create_WRK (hg_intercepts.c:257)

==17884==    by 0x4026F8B: pthread_create@* (hg_intercepts.c:288)

==17884==    by 0x4B48D7C: boost::thread::start_thread() (thread.cpp:185)

==17884==    by 0x45C2C6D: Wt::WServer::start() (thread.hpp:191)

==17884==    by 0x45C3A38: Wt::WRun(int, char**, boost::function<Wt::WApplication* ()(Wt::WEnvironment const&)>) (WServer.C:492)

==17884==    by 0x804ADED: main (in /home/richel/Projects/Website/CppHelgrindExample3-build-desktop/CppHelgrindExample3)

==17884== 

==17884== Thread #2 was created

==17884==    at 0x4A9A728: clone (clone.S:111)

==17884==    by 0x48894B5: pthread_create@@GLIBC_2.1 (createthread.c:256)

==17884==    by 0x4026E2D: pthread_create_WRK (hg_intercepts.c:257)

==17884==    by 0x4026F8B: pthread_create@* (hg_intercepts.c:288)

==17884==    by 0x4B48D7C: boost::thread::start_thread() (thread.cpp:185)

==17884==    by 0x45C2C6D: Wt::WServer::start() (thread.hpp:191)

==17884==    by 0x45C3A38: Wt::WRun(int, char**, boost::function<Wt::WApplication* ()(Wt::WEnvironment const&)>) (WServer.C:492)

==17884==    by 0x804ADED: main (in /home/richel/Projects/Website/CppHelgrindExample3-build-desktop/CppHelgrindExample3)

==17884== 

==17884== Possible data race during read of size 4 at 0x4b5318c by thread #3

==17884==    at 0x4B48E44: _ZN5boost9call_onceIPFvvEEEvRNS_9once_flagET_.clone.101 (once.hpp:49)

==17884==    by 0x4B48F96: boost::detail::set_current_thread_data(boost::detail::thread_data_base*) (thread.cpp:104)

==17884==    by 0x4B4901D: thread_proxy (thread.cpp:117)

==17884==    by 0x4026F60: mythread_wrapper (hg_intercepts.c:221)

==17884==    by 0x4888E98: start_thread (pthread_create.c:304)

==17884==    by 0x4A9A73D: clone (clone.S:130)

==17884==  This conflicts with a previous write of size 4 by thread #2

==17884==    at 0x4B48F3D: _ZN5boost9call_onceIPFvvEEEvRNS_9once_flagET_.clone.101 (once.hpp:72)

==17884==    by 0x4B48F96: boost::detail::set_current_thread_data(boost::detail::thread_data_base*) (thread.cpp:104)

==17884==    by 0x4B4901D: thread_proxy (thread.cpp:117)

==17884==    by 0x4026F60: mythread_wrapper (hg_intercepts.c:221)

==17884==    by 0x4888E98: start_thread (pthread_create.c:304)

==17884==    by 0x4A9A73D: clone (clone.S:130)

==17884== 

==17884== Possible data race during read of size 4 at 0x4b53188 by thread #3

==17884==    at 0x4B48E4A: _ZN5boost9call_onceIPFvvEEEvRNS_9once_flagET_.clone.101 (once.hpp:49)

==17884==    by 0x4B48F96: boost::detail::set_current_thread_data(boost::detail::thread_data_base*) (thread.cpp:104)

==17884==    by 0x4B4901D: thread_proxy (thread.cpp:117)

==17884==    by 0x4026F60: mythread_wrapper (hg_intercepts.c:221)

==17884==    by 0x4888E98: start_thread (pthread_create.c:304)

==17884==    by 0x4A9A73D: clone (clone.S:130)

==17884==  This conflicts with a previous write of size 4 by thread #2

==17884==    at 0x4B48F43: _ZN5boost9call_onceIPFvvEEEvRNS_9once_flagET_.clone.101 (once.hpp:72)

==17884==    by 0x4B48F96: boost::detail::set_current_thread_data(boost::detail::thread_data_base*) (thread.cpp:104)

==17884==    by 0x4B4901D: thread_proxy (thread.cpp:117)

==17884==    by 0x4026F60: mythread_wrapper (hg_intercepts.c:221)

==17884==    by 0x4888E98: start_thread (pthread_create.c:304)

==17884==    by 0x4A9A73D: clone (clone.S:130)

==17884== 

==17884== Possible data race during read of size 4 at 0x4b531f4 by thread #3

==17884==    at 0x4B4E85F: boost::detail::get_once_per_thread_epoch() (once.cpp:40)

==17884==    by 0x4B48E54: _ZN5boost9call_onceIPFvvEEEvRNS_9once_flagET_.clone.101 (once.hpp:50)

==17884==    by 0x4B48F96: boost::detail::set_current_thread_data(boost::detail::thread_data_base*) (thread.cpp:104)

==17884==    by 0x4B4901D: thread_proxy (thread.cpp:117)

==17884==    by 0x4026F60: mythread_wrapper (hg_intercepts.c:221)

==17884==    by 0x4888E98: start_thread (pthread_create.c:304)

==17884==    by 0x4A9A73D: clone (clone.S:130)

==17884==  This conflicts with a previous write of size 4 by thread #2

==17884==    at 0x488E34D: pthread_key_create (pthread_key_create.c:44)

==17884==    by 0x4B4E7F9: create_epoch_tss_key (once.cpp:32)

==17884==    by 0x488E99F: pthread_once (pthread_once.S:122)

==17884==    by 0x4B48E54: _ZN5boost9call_onceIPFvvEEEvRNS_9once_flagET_.clone.101 (once.hpp:50)

==17884==    by 0x4B48F96: boost::detail::set_current_thread_data(boost::detail::thread_data_base*) (thread.cpp:104)

==17884==    by 0x4B4901D: thread_proxy (thread.cpp:117)

==17884==    by 0x4026F60: mythread_wrapper (hg_intercepts.c:221)

==17884==    by 0x4888E98: start_thread (pthread_create.c:304)

==17884== 

==17884== Thread #9 was created

==17884==    at 0x4A9A728: clone (clone.S:111)

==17884==    by 0x48894B5: pthread_create@@GLIBC_2.1 (createthread.c:256)

==17884==    by 0x4026E2D: pthread_create_WRK (hg_intercepts.c:257)

==17884==    by 0x4026F8B: pthread_create@* (hg_intercepts.c:288)

==17884==    by 0x4B48D7C: boost::thread::start_thread() (thread.cpp:185)

==17884==    by 0x45C2C6D: Wt::WServer::start() (thread.hpp:191)

==17884==    by 0x45C3A38: Wt::WRun(int, char**, boost::function<Wt::WApplication* ()(Wt::WEnvironment const&)>) (WServer.C:492)

==17884==    by 0x804ADED: main (in /home/richel/Projects/Website/CppHelgrindExample3-build-desktop/CppHelgrindExample3)

==17884== 

==17884== Possible data race during write of size 4 at 0x613f638 by thread #9

==17884==    at 0x43B9069: Wt::WebSession::setState(Wt::WebSession::State, int) (WebSession.C:222)

==17884==    by 0x43B914E: Wt::WebSession::setLoaded() (WebSession.C:209)

==17884==    by 0x43C0994: Wt::WebSession::handleRequest(Wt::WebSession::Handler&) (WebSession.C:1214)

==17884==    by 0x43D86A3: Wt::WebController::handleAsyncRequest(Wt::WebRequest*) (WebController.C:638)

==17884==    by 0x43D9703: Wt::WebController::handleRequest(Wt::WebRequest*) (WebController.C:512)

==17884==    by 0x45BE959: Wt::WServer::handleRequest(Wt::WebRequest*) (WServer.C:372)

==17884==    by 0x45C690D: http::server::WtReply::consumeRequestBody(char const*, char const*, http::server::Request::State) (WtReply.C:187)

==17884==    by 0x45C7CDB: http::server::WtReply::consumeData(char const*, char const*, http::server::Request::State) (WtReply.C:81)

==17884==    by 0x45889DF: http::server::RequestParser::parseBody(http::server::Request&, boost::shared_ptr<http::server::Reply>, char const*&, char const*) (RequestParser.C:137)

==17884==    by 0x456F58D: http::server::Connection::handleReadBody() (Connection.C:172)

==17884==    by 0x4571A8B: http::server::Connection::handleReadRequest0() (Connection.C:120)

==17884==    by 0x4571C89: http::server::Connection::handleReadRequest(boost::system::error_code const&, unsigned int) (Connection.C:154)

==17884==  This conflicts with a previous read of size 4 by thread #2

==17884==    at 0x43D85BD: Wt::WebController::handleAsyncRequest(Wt::WebRequest*) (WebController.C:590)

==17884==    by 0x43D9703: Wt::WebController::handleRequest(Wt::WebRequest*) (WebController.C:512)

==17884==    by 0x45BE959: Wt::WServer::handleRequest(Wt::WebRequest*) (WServer.C:372)

==17884==    by 0x45C690D: http::server::WtReply::consumeRequestBody(char const*, char const*, http::server::Request::State) (WtReply.C:187)

==17884==    by 0x45C7CDB: http::server::WtReply::consumeData(char const*, char const*, http::server::Request::State) (WtReply.C:81)

==17884==    by 0x45889DF: http::server::RequestParser::parseBody(http::server::Request&, boost::shared_ptr<http::server::Reply>, char const*&, char const*) (RequestParser.C:137)

==17884==    by 0x456F58D: http::server::Connection::handleReadBody() (Connection.C:172)

==17884==    by 0x4571A8B: http::server::Connection::handleReadRequest0() (Connection.C:120)

==17884==  Address 0x613f638 is 144 bytes inside a block of size 1472 alloc'd

==17884==    at 0x402647D: operator new(unsigned int) (vg_replace_malloc.c:255)

==17884==    by 0x43D89ED: Wt::WebController::handleAsyncRequest(Wt::WebRequest*) (WebController.C:613)

==17884==    by 0x43D9703: Wt::WebController::handleRequest(Wt::WebRequest*) (WebController.C:512)

==17884==    by 0x45BE959: Wt::WServer::handleRequest(Wt::WebRequest*) (WServer.C:372)

==17884==    by 0x45C690D: http::server::WtReply::consumeRequestBody(char const*, char const*, http::server::Request::State) (WtReply.C:187)

==17884==    by 0x45C7CDB: http::server::WtReply::consumeData(char const*, char const*, http::server::Request::State) (WtReply.C:81)

==17884==    by 0x45889DF: http::server::RequestParser::parseBody(http::server::Request&, boost::shared_ptr<http::server::Reply>, char const*&, char const*) (RequestParser.C:137)

==17884==    by 0x456F58D: http::server::Connection::handleReadBody() (Connection.C:172)

==17884==    by 0x4571A8B: http::server::Connection::handleReadRequest0() (Connection.C:120)

==17884==    by 0x4571C89: http::server::Connection::handleReadRequest(boost::system::error_code const&, unsigned int) (Connection.C:154)

==17884==    by 0x45B6071: boost::asio::detail::handler_queue::handler_wrapper<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> >::do_call(boost::asio::detail::handler_queue::handler*) (mem_fn_template.hpp:271)

==17884==    by 0x4598445: boost::asio::detail::task_io_service<boost::asio::detail::epoll_reactor<false> >::run(boost::system::error_code&) (handler_queue.hpp:39)

==17884== 

==17884== Possible data race during write of size 4 at 0x614c8f0 by thread #2

==17884==    at 0x4928DFE: std::string::_M_mutate(unsigned int, unsigned int, unsigned int) (in /usr/lib/i386-linux-gnu/libstdc++.so.6.0.14)

==17884==    by 0x45C64D7: http::server::WtReply::nextContentBuffer() (basic_string.h:787)

==17884==    by 0x457F722: http::server::Reply::encodeNextContentBuffer(std::vector<boost::asio::const_buffer, std::allocator<boost::asio::const_buffer> >&, int&, int&) (Reply.C:527)

==17884==    by 0x4580BD1: http::server::Reply::nextBuffers(std::vector<boost::asio::const_buffer, std::allocator<boost::asio::const_buffer> >&) (Reply.C:369)

==17884==    by 0x45713FA: http::server::Connection::startWriteResponse() (Connection.C:201)

==17884==    by 0x457123F: http::server::Connection::handleWriteResponse() (Connection.C:225)

==17884==    by 0x4571385: http::server::Connection::handleWriteResponse(boost::system::error_code const&) (Connection.C:257)

==17884==    by 0x45BC10F: boost::asio::detail::write_handler<boost::asio::basic_stream_socket<boost::asio::ip::tcp, boost::asio::stream_socket_service<boost::asio::ip::tcp> >, std::vector<boost::asio::const_buffer, std::allocator<boost::asio::const_buffer> >, boost::asio::detail::transfer_all_t, boost::_bi::bind_t<void, boost::_mfi::mf1<void, http::server::Connection, boost::system::error_code const&>, boost::_bi::list2<boost::_bi::value<boost::shared_ptr<http::server::Connection> >, boost::arg<1> (*)()> > >::operator()(boost::system::error_code const&, unsigned int) (mem_fn_template.hpp:156)

==17884==    by 0x45BCBD1: boost::asio::detail::handler_queue::handler_wrapper<boost::asio::detail::binder2<boost::asio::detail::write_handler<boost::asio::basic_stream_socket<boost::asio::ip::tcp, boost::asio::stream_socket_service<boost::asio::ip::tcp> >, std::vector<boost::asio::const_buffer, std::allocator<boost::asio::const_buffer> >, boost::asio::detail::transfer_all_t, boost::_bi::bind_t<void, boost::_mfi::mf1<void, http::server::Connection, boost::system::error_code const&>, boost::_bi::list2<boost::_bi::value<boost::shared_ptr<http::server::Connection> >, boost::arg<1> (*)()> > >, boost::system::error_code, unsigned int> >::do_call(boost::asio::detail::handler_queue::handler*) (bind_handler.hpp:96)

==17884==    by 0x4598445: boost::asio::detail::task_io_service<boost::asio::detail::epoll_reactor<false> >::run(boost::system::error_code&) (handler_queue.hpp:39)

==17884==    by 0x458E4ED: http::server::Server::run() (io_service.ipp:68)

==17884==    by 0x45C413A: Wt::WServerImpl::runThread(Wt::WServer*) (WServer.C:123)

==17884==  This conflicts with a previous read of size 4 by thread #9

==17884==    at 0x4927D5E: std::string::swap(std::string&) (in /usr/lib/i386-linux-gnu/libstdc++.so.6.0.14)

==17884==    by 0x45C64EF: http::server::WtReply::nextContentBuffer() (WtReply.C:329)

==17884==    by 0x457F722: http::server::Reply::encodeNextContentBuffer(std::vector<boost::asio::const_buffer, std::allocator<boost::asio::const_buffer> >&, int&, int&) (Reply.C:527)

==17884==    by 0x4580BD1: http::server::Reply::nextBuffers(std::vector<boost::asio::const_buffer, std::allocator<boost::asio::const_buffer> >&) (Reply.C:369)

==17884==    by 0x45713FA: http::server::Connection::startWriteResponse() (Connection.C:201)

==17884==    by 0x457123F: http::server::Connection::handleWriteResponse() (Connection.C:225)

==17884==    by 0x4571385: http::server::Connection::handleWriteResponse(boost::system::error_code const&) (Connection.C:257)

==17884==    by 0x45BC10F: boost::asio::detail::write_handler<boost::asio::basic_stream_socket<boost::asio::ip::tcp, boost::asio::stream_socket_service<boost::asio::ip::tcp> >, std::vector<boost::asio::const_buffer, std::allocator<boost::asio::const_buffer> >, boost::asio::detail::transfer_all_t, boost::_bi::bind_t<void, boost::_mfi::mf1<void, http::server::Connection, boost::system::error_code const&>, boost::_bi::list2<boost::_bi::value<boost::shared_ptr<http::server::Connection> >, boost::arg<1> (*)()> > >::operator()(boost::system::error_code const&, unsigned int) (mem_fn_template.hpp:156)

==17884==  Address 0x614c8f0 is 8 bytes inside a block of size 65 alloc'd

==17884==    at 0x402647D: operator new(unsigned int) (vg_replace_malloc.c:255)

==17884==    by 0x49289F7: std::string::_Rep::_S_create(unsigned int, unsigned int, std::allocator<char> const&) (in /usr/lib/i386-linux-gnu/libstdc++.so.6.0.14)

==17884==    by 0x4169873: char* std::string::_S_construct<char*>(char*, char*, std::allocator<char> const&, std::forward_iterator_tag) (basic_string.tcc:138)

==17884==    by 0x457D674: http::server::HTTPRequest::flush(Wt::WebRequest::ResponseState, boost::function<void ()()>) (basic_string.h:1649)

==17884==    by 0x43C041E: Wt::WebSession::handleRequest(Wt::WebSession::Handler&) (WebSession.C:1254)

==17884==    by 0x43D86A3: Wt::WebController::handleAsyncRequest(Wt::WebRequest*) (WebController.C:638)

==17884==    by 0x43D9703: Wt::WebController::handleRequest(Wt::WebRequest*) (WebController.C:512)

==17884==    by 0x45BE959: Wt::WServer::handleRequest(Wt::WebRequest*) (WServer.C:372)

==17884==    by 0x45C690D: http::server::WtReply::consumeRequestBody(char const*, char const*, http::server::Request::State) (WtReply.C:187)

==17884==    by 0x45C7CDB: http::server::WtReply::consumeData(char const*, char const*, http::server::Request::State) (WtReply.C:81)

==17884==    by 0x45889DF: http::server::RequestParser::parseBody(http::server::Request&, boost::shared_ptr<http::server::Reply>, char const*&, char const*) (RequestParser.C:137)

==17884==    by 0x456F58D: http::server::Connection::handleReadBody() (Connection.C:172)

==17884== 

==17884== Thread #10 was created

==17884==    at 0x4A9A728: clone (clone.S:111)

==17884==    by 0x48894B5: pthread_create@@GLIBC_2.1 (createthread.c:256)

==17884==    by 0x4026E2D: pthread_create_WRK (hg_intercepts.c:257)

==17884==    by 0x4026F8B: pthread_create@* (hg_intercepts.c:288)

==17884==    by 0x4B48D7C: boost::thread::start_thread() (thread.cpp:185)

==17884==    by 0x45C2C6D: Wt::WServer::start() (thread.hpp:191)

==17884==    by 0x45C3A38: Wt::WRun(int, char**, boost::function<Wt::WApplication* ()(Wt::WEnvironment const&)>) (WServer.C:492)

==17884==    by 0x804ADED: main (in /home/richel/Projects/Website/CppHelgrindExample3-build-desktop/CppHelgrindExample3)

==17884== 

==17884== Possible data race during write of size 4 at 0x49816f0 by thread #2

==17884==    at 0x48EF2B9: std::locale::locale(std::locale::_Impl*) (in /usr/lib/i386-linux-gnu/libstdc++.so.6.0.14)

==17884==    by 0x48F1505: std::locale::classic() (in /usr/lib/i386-linux-gnu/libstdc++.so.6.0.14)

==17884==    by 0x42679FB: std::basic_string<char, std::char_traits<char>, std::allocator<char> > boost::posix_time::to_simple_string_type<char>(boost::posix_time::ptime) (date_formatting.hpp:85)

==17884==    by 0x4266507: Wt::WLogEntry::operator<<(Wt::WLogger::TimeStamp const&) (time_formatters.hpp:184)

==17884==    by 0x457F35E: http::server::Reply::logReply(Wt::WLogger&) (Reply.C:469)

==17884==    by 0x4571111: http::server::Connection::handleWriteResponse() (Connection.C:232)

==17884==    by 0x4571385: http::server::Connection::handleWriteResponse(boost::system::error_code const&) (Connection.C:257)

==17884==    by 0x45BC10F: boost::asio::detail::write_handler<boost::asio::basic_stream_socket<boost::asio::ip::tcp, boost::asio::stream_socket_service<boost::asio::ip::tcp> >, std::vector<boost::asio::const_buffer, std::allocator<boost::asio::const_buffer> >, boost::asio::detail::transfer_all_t, boost::_bi::bind_t<void, boost::_mfi::mf1<void, http::server::Connection, boost::system::error_code const&>, boost::_bi::list2<boost::_bi::value<boost::shared_ptr<http::server::Connection> >, boost::arg<1> (*)()> > >::operator()(boost::system::error_code const&, unsigned int) (mem_fn_template.hpp:156)

==17884==    by 0x45BCBD1: boost::asio::detail::handler_queue::handler_wrapper<boost::asio::detail::binder2<boost::asio::detail::write_handler<boost::asio::basic_stream_socket<boost::asio::ip::tcp, boost::asio::stream_socket_service<boost::asio::ip::tcp> >, std::vector<boost::asio::const_buffer, std::allocator<boost::asio::const_buffer> >, boost::asio::detail::transfer_all_t, boost::_bi::bind_t<void, boost::_mfi::mf1<void, http::server::Connection, boost::system::error_code const&>, boost::_bi::list2<boost::_bi::value<boost::shared_ptr<http::server::Connection> >, boost::arg<1> (*)()> > >, boost::system::error_code, unsigned int> >::do_call(boost::asio::detail::handler_queue::handler*) (bind_handler.hpp:96)

==17884==    by 0x4598445: boost::asio::detail::task_io_service<boost::asio::detail::epoll_reactor<false> >::run(boost::system::error_code&) (handler_queue.hpp:39)

==17884==    by 0x458E4ED: http::server::Server::run() (io_service.ipp:68)

==17884==    by 0x45C413A: Wt::WServerImpl::runThread(Wt::WServer*) (WServer.C:123)

==17884==  This conflicts with a previous write of size 4 by thread #10

==17884==    at 0x48EF2B9: std::locale::locale(std::locale::_Impl*) (in /usr/lib/i386-linux-gnu/libstdc++.so.6.0.14)

==17884==    by 0x48F1505: std::locale::classic() (in /usr/lib/i386-linux-gnu/libstdc++.so.6.0.14)

==17884==    by 0x42679FB: std::basic_string<char, std::char_traits<char>, std::allocator<char> > boost::posix_time::to_simple_string_type<char>(boost::posix_time::ptime) (date_formatting.hpp:85)

==17884==    by 0x4266507: Wt::WLogEntry::operator<<(Wt::WLogger::TimeStamp const&) (time_formatters.hpp:184)

==17884==    by 0x43B8DC0: Wt::WebSession::log(std::string const&) const (WebSession.C:131)

==17884==    by 0x43C3CB1: Wt::WebSession::~WebSession() (WebSession.C:171)

==17884==    by 0x436F078: boost::detail::sp_counted_impl_p<Wt::WebSession>::dispose() (checked_delete.hpp:34)

==17884==    by 0x804B8F7: boost::detail::shared_count::~shared_count() (in /home/richel/Projects/Website/CppHelgrindExample3-build-desktop/CppHelgrindExample3)

==17884== 

==17884== Possible data race during write of size 4 at 0x6144d40 by thread #2

==17884==    at 0x45C5106: http::server::WtReply::~WtReply() (WtReply.C:63)

==17884==    by 0x45C56B1: http::server::WtReply::~WtReply() (WtReply.C:72)

==17884==    by 0x4587AE7: boost::detail::sp_counted_impl_p<http::server::WtReply>::dispose() (checked_delete.hpp:34)

==17884==    by 0x804B8F7: boost::detail::shared_count::~shared_count() (in /home/richel/Projects/Website/CppHelgrindExample3-build-desktop/CppHelgrindExample3)

==17884==    by 0x4571179: http::server::Connection::handleWriteResponse() (shared_ptr.hpp:169)

==17884==    by 0x4571385: http::server::Connection::handleWriteResponse(boost::system::error_code const&) (Connection.C:257)

==17884==    by 0x45BC10F: boost::asio::detail::write_handler<boost::asio::basic_stream_socket<boost::asio::ip::tcp, boost::asio::stream_socket_service<boost::asio::ip::tcp> >, std::vector<boost::asio::const_buffer, std::allocator<boost::asio::const_buffer> >, boost::asio::detail::transfer_all_t, boost::_bi::bind_t<void, boost::_mfi::mf1<void, http::server::Connection, boost::system::error_code const&>, boost::_bi::list2<boost::_bi::value<boost::shared_ptr<http::server::Connection> >, boost::arg<1> (*)()> > >::operator()(boost::system::error_code const&, unsigned int) (mem_fn_template.hpp:156)

==17884==    by 0x45BCBD1: boost::asio::detail::handler_queue::handler_wrapper<boost::asio::detail::binder2<boost::asio::detail::write_handler<boost::asio::basic_stream_socket<boost::asio::ip::tcp, boost::asio::stream_socket_service<boost::asio::ip::tcp> >, std::vector<boost::asio::const_buffer, std::allocator<boost::asio::const_buffer> >, boost::asio::detail::transfer_all_t, boost::_bi::bind_t<void, boost::_mfi::mf1<void, http::server::Connection, boost::system::error_code const&>, boost::_bi::list2<boost::_bi::value<boost::shared_ptr<http::server::Connection> >, boost::arg<1> (*)()> > >, boost::system::error_code, unsigned int> >::do_call(boost::asio::detail::handler_queue::handler*) (bind_handler.hpp:96)

==17884==    by 0x4598445: boost::asio::detail::task_io_service<boost::asio::detail::epoll_reactor<false> >::run(boost::system::error_code&) (handler_queue.hpp:39)

==17884==    by 0x458E4ED: http::server::Server::run() (io_service.ipp:68)

==17884==    by 0x45C413A: Wt::WServerImpl::runThread(Wt::WServer*) (WServer.C:123)

==17884==    by 0x45C4041: boost::detail::thread_data<boost::_bi::bind_t<void, boost::_mfi::mf1<void, Wt::WServerImpl, Wt::WServer*>, boost::_bi::list2<boost::_bi::value<Wt::WServerImpl*>, boost::_bi::value<Wt::WServer*> > > >::run() (mem_fn_template.hpp:165)

==17884==  This conflicts with a previous read of size 4 by thread #10

==17884==    at 0x45889ED: http::server::RequestParser::parseBody(http::server::Request&, boost::shared_ptr<http::server::Reply>, char const*&, char const*) (RequestParser.C:139)

==17884==    by 0x456F58D: http::server::Connection::handleReadBody() (Connection.C:172)

==17884==    by 0x4571A8B: http::server::Connection::handleReadRequest0() (Connection.C:120)

==17884==    by 0x4571C89: http::server::Connection::handleReadRequest(boost::system::error_code const&, unsigned int) (Connection.C:154)

==17884==    by 0x45B6071: boost::asio::detail::handler_queue::handler_wrapper<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> >::do_call(boost::asio::detail::handler_queue::handler*) (mem_fn_template.hpp:271)

==17884==    by 0x4598445: boost::asio::detail::task_io_service<boost::asio::detail::epoll_reactor<false> >::run(boost::system::error_code&) (handler_queue.hpp:39)

==17884==    by 0x458E4ED: http::server::Server::run() (io_service.ipp:68)

==17884==    by 0x45C413A: Wt::WServerImpl::runThread(Wt::WServer*) (WServer.C:123)

==17884==  Address 0x6144d40 is 0 bytes inside a block of size 476 alloc'd

==17884==    at 0x402647D: operator new(unsigned int) (vg_replace_malloc.c:255)

==17884==    by 0x4586C67: http::server::RequestHandler::handleRequest(http::server::Request&) (RequestHandler.C:145)

==17884==    by 0x45719FB: http::server::Connection::handleReadRequest0() (Connection.C:116)

==17884==    by 0x4571C89: http::server::Connection::handleReadRequest(boost::system::error_code const&, unsigned int) (Connection.C:154)

==17884==    by 0x45B6071: boost::asio::detail::handler_queue::handler_wrapper<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> >::do_call(boost::asio::detail::handler_queue::handler*) (mem_fn_template.hpp:271)

==17884==    by 0x4598445: boost::asio::detail::task_io_service<boost::asio::detail::epoll_reactor<false> >::run(boost::system::error_code&) (handler_queue.hpp:39)

==17884==    by 0x458E4ED: http::server::Server::run() (io_service.ipp:68)

==17884==    by 0x45C413A: Wt::WServerImpl::runThread(Wt::WServer*) (WServer.C:123)

==17884==    by 0x45C4041: boost::detail::thread_data<boost::_bi::bind_t<void, boost::_mfi::mf1<void, Wt::WServerImpl, Wt::WServer*>, boost::_bi::list2<boost::_bi::value<Wt::WServerImpl*>, boost::_bi::value<Wt::WServer*> > > >::run() (mem_fn_template.hpp:165)

==17884==    by 0x4B49028: thread_proxy (thread.cpp:120)

==17884==    by 0x4026F60: mythread_wrapper (hg_intercepts.c:221)

==17884==    by 0x4888E98: start_thread (pthread_create.c:304)

==17884== 

==17884== Thread #8 was created

==17884==    at 0x4A9A728: clone (clone.S:111)

==17884==    by 0x48894B5: pthread_create@@GLIBC_2.1 (createthread.c:256)

==17884==    by 0x4026E2D: pthread_create_WRK (hg_intercepts.c:257)

==17884==    by 0x4026F8B: pthread_create@* (hg_intercepts.c:288)

==17884==    by 0x4B48D7C: boost::thread::start_thread() (thread.cpp:185)

==17884==    by 0x45C2C6D: Wt::WServer::start() (thread.hpp:191)

==17884==    by 0x45C3A38: Wt::WRun(int, char**, boost::function<Wt::WApplication* ()(Wt::WEnvironment const&)>) (WServer.C:492)

==17884==    by 0x804ADED: main (in /home/richel/Projects/Website/CppHelgrindExample3-build-desktop/CppHelgrindExample3)

==17884== 

==17884== Thread #11 was created

==17884==    at 0x4A9A728: clone (clone.S:111)

==17884==    by 0x48894B5: pthread_create@@GLIBC_2.1 (createthread.c:256)

==17884==    by 0x4026E2D: pthread_create_WRK (hg_intercepts.c:257)

==17884==    by 0x4026F8B: pthread_create@* (hg_intercepts.c:288)

==17884==    by 0x4B48D7C: boost::thread::start_thread() (thread.cpp:185)

==17884==    by 0x45C2C6D: Wt::WServer::start() (thread.hpp:191)

==17884==    by 0x45C3A38: Wt::WRun(int, char**, boost::function<Wt::WApplication* ()(Wt::WEnvironment const&)>) (WServer.C:492)

==17884==    by 0x804ADED: main (in /home/richel/Projects/Website/CppHelgrindExample3-build-desktop/CppHelgrindExample3)

==17884== 

==17884== Possible data race during read of size 4 at 0x497fe8c by thread #8

==17884==    at 0x491C438: std::basic_ostream<char, std::char_traits<char> >& std::__ostream_insert<char, std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, char const*, int) (in /usr/lib/i386-linux-gnu/libstdc++.so.6.0.14)

==17884==    by 0x4265C7A: Wt::WLogger::addLine(std::string const&) const (basic_string.h:2605)

==17884==    by 0x426621F: Wt::WLogEntry::~WLogEntry() (WLogger.C:27)

==17884==    by 0x457F49E: http::server::Reply::logReply(Wt::WLogger&) (Reply.C:464)

==17884==    by 0x4571111: http::server::Connection::handleWriteResponse() (Connection.C:232)

==17884==    by 0x4571385: http::server::Connection::handleWriteResponse(boost::system::error_code const&) (Connection.C:257)

==17884==    by 0x45BC10F: boost::asio::detail::write_handler<boost::asio::basic_stream_socket<boost::asio::ip::tcp, boost::asio::stream_socket_service<boost::asio::ip::tcp> >, std::vector<boost::asio::const_buffer, std::allocator<boost::asio::const_buffer> >, boost::asio::detail::transfer_all_t, boost::_bi::bind_t<void, boost::_mfi::mf1<void, http::server::Connection, boost::system::error_code const&>, boost::_bi::list2<boost::_bi::value<boost::shared_ptr<http::server::Connection> >, boost::arg<1> (*)()> > >::operator()(boost::system::error_code const&, unsigned int) (mem_fn_template.hpp:156)

==17884==    by 0x45BCBD1: boost::asio::detail::handler_queue::handler_wrapper<boost::asio::detail::binder2<boost::asio::detail::write_handler<boost::asio::basic_stream_socket<boost::asio::ip::tcp, boost::asio::stream_socket_service<boost::asio::ip::tcp> >, std::vector<boost::asio::const_buffer, std::allocator<boost::asio::const_buffer> >, boost::asio::detail::transfer_all_t, boost::_bi::bind_t<void, boost::_mfi::mf1<void, http::server::Connection, boost::system::error_code const&>, boost::_bi::list2<boost::_bi::value<boost::shared_ptr<http::server::Connection> >, boost::arg<1> (*)()> > >, boost::system::error_code, unsigned int> >::do_call(boost::asio::detail::handler_queue::handler*) (bind_handler.hpp:96)

==17884==    by 0x4598445: boost::asio::detail::task_io_service<boost::asio::detail::epoll_reactor<false> >::run(boost::system::error_code&) (handler_queue.hpp:39)

==17884==    by 0x458E4ED: http::server::Server::run() (io_service.ipp:68)

==17884==    by 0x45C413A: Wt::WServerImpl::runThread(Wt::WServer*) (WServer.C:123)

==17884==    by 0x45C4041: boost::detail::thread_data<boost::_bi::bind_t<void, boost::_mfi::mf1<void, Wt::WServerImpl, Wt::WServer*>, boost::_bi::list2<boost::_bi::value<Wt::WServerImpl*>, boost::_bi::value<Wt::WServer*> > > >::run() (mem_fn_template.hpp:165)

==17884==  This conflicts with a previous write of size 4 by thread #11

==17884==    at 0x491C53C: std::basic_ostream<char, std::char_traits<char> >& std::__ostream_insert<char, std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, char const*, int) (in /usr/lib/i386-linux-gnu/libstdc++.so.6.0.14)

==17884==    by 0x4265C7A: Wt::WLogger::addLine(std::string const&) const (basic_string.h:2605)

==17884==    by 0x426621F: Wt::WLogEntry::~WLogEntry() (WLogger.C:27)

==17884==    by 0x457F49E: http::server::Reply::logReply(Wt::WLogger&) (Reply.C:464)

==17884==    by 0x4571111: http::server::Connection::handleWriteResponse() (Connection.C:232)

==17884==    by 0x4571385: http::server::Connection::handleWriteResponse(boost::system::error_code const&) (Connection.C:257)

==17884==    by 0x45BC10F: boost::asio::detail::write_handler<boost::asio::basic_stream_socket<boost::asio::ip::tcp, boost::asio::stream_socket_service<boost::asio::ip::tcp> >, std::vector<boost::asio::const_buffer, std::allocator<boost::asio::const_buffer> >, boost::asio::detail::transfer_all_t, boost::_bi::bind_t<void, boost::_mfi::mf1<void, http::server::Connection, boost::system::error_code const&>, boost::_bi::list2<boost::_bi::value<boost::shared_ptr<http::server::Connection> >, boost::arg<1> (*)()> > >::operator()(boost::system::error_code const&, unsigned int) (mem_fn_template.hpp:156)

==17884==    by 0x45BCBD1: boost::asio::detail::handler_queue::handler_wrapper<boost::asio::detail::binder2<boost::asio::detail::write_handler<boost::asio::basic_stream_socket<boost::asio::ip::tcp, boost::asio::stream_socket_service<boost::asio::ip::tcp> >, std::vector<boost::asio::const_buffer, std::allocator<boost::asio::const_buffer> >, boost::asio::detail::transfer_all_t, boost::_bi::bind_t<void, boost::_mfi::mf1<void, http::server::Connection, boost::system::error_code const&>, boost::_bi::list2<boost::_bi::value<boost::shared_ptr<http::server::Connection> >, boost::arg<1> (*)()> > >, boost::system::error_code, unsigned int> >::do_call(boost::asio::detail::handler_queue::handler*) (bind_handler.hpp:96)

==17884== 

==17884== Possible data race during write of size 4 at 0x497fe8c by thread #8

==17884==    at 0x491C53C: std::basic_ostream<char, std::char_traits<char> >& std::__ostream_insert<char, std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, char const*, int) (in /usr/lib/i386-linux-gnu/libstdc++.so.6.0.14)

==17884==    by 0x4265C7A: Wt::WLogger::addLine(std::string const&) const (basic_string.h:2605)

==17884==    by 0x426621F: Wt::WLogEntry::~WLogEntry() (WLogger.C:27)

==17884==    by 0x457F49E: http::server::Reply::logReply(Wt::WLogger&) (Reply.C:464)

==17884==    by 0x4571111: http::server::Connection::handleWriteResponse() (Connection.C:232)

==17884==    by 0x4571385: http::server::Connection::handleWriteResponse(boost::system::error_code const&) (Connection.C:257)

==17884==    by 0x45BC10F: boost::asio::detail::write_handler<boost::asio::basic_stream_socket<boost::asio::ip::tcp, boost::asio::stream_socket_service<boost::asio::ip::tcp> >, std::vector<boost::asio::const_buffer, std::allocator<boost::asio::const_buffer> >, boost::asio::detail::transfer_all_t, boost::_bi::bind_t<void, boost::_mfi::mf1<void, http::server::Connection, boost::system::error_code const&>, boost::_bi::list2<boost::_bi::value<boost::shared_ptr<http::server::Connection> >, boost::arg<1> (*)()> > >::operator()(boost::system::error_code const&, unsigned int) (mem_fn_template.hpp:156)

==17884==    by 0x45BCBD1: boost::asio::detail::handler_queue::handler_wrapper<boost::asio::detail::binder2<boost::asio::detail::write_handler<boost::asio::basic_stream_socket<boost::asio::ip::tcp, boost::asio::stream_socket_service<boost::asio::ip::tcp> >, std::vector<boost::asio::const_buffer, std::allocator<boost::asio::const_buffer> >, boost::asio::detail::transfer_all_t, boost::_bi::bind_t<void, boost::_mfi::mf1<void, http::server::Connection, boost::system::error_code const&>, boost::_bi::list2<boost::_bi::value<boost::shared_ptr<http::server::Connection> >, boost::arg<1> (*)()> > >, boost::system::error_code, unsigned int> >::do_call(boost::asio::detail::handler_queue::handler*) (bind_handler.hpp:96)

==17884==    by 0x4598445: boost::asio::detail::task_io_service<boost::asio::detail::epoll_reactor<false> >::run(boost::system::error_code&) (handler_queue.hpp:39)

==17884==    by 0x458E4ED: http::server::Server::run() (io_service.ipp:68)

==17884==    by 0x45C413A: Wt::WServerImpl::runThread(Wt::WServer*) (WServer.C:123)

==17884==    by 0x45C4041: boost::detail::thread_data<boost::_bi::bind_t<void, boost::_mfi::mf1<void, Wt::WServerImpl, Wt::WServer*>, boost::_bi::list2<boost::_bi::value<Wt::WServerImpl*>, boost::_bi::value<Wt::WServer*> > > >::run() (mem_fn_template.hpp:165)

==17884==  This conflicts with a previous write of size 4 by thread #11

==17884==    at 0x491C53C: std::basic_ostream<char, std::char_traits<char> >& std::__ostream_insert<char, std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, char const*, int) (in /usr/lib/i386-linux-gnu/libstdc++.so.6.0.14)

==17884==    by 0x4265C7A: Wt::WLogger::addLine(std::string const&) const (basic_string.h:2605)

==17884==    by 0x426621F: Wt::WLogEntry::~WLogEntry() (WLogger.C:27)

==17884==    by 0x457F49E: http::server::Reply::logReply(Wt::WLogger&) (Reply.C:464)

==17884==    by 0x4571111: http::server::Connection::handleWriteResponse() (Connection.C:232)

==17884==    by 0x4571385: http::server::Connection::handleWriteResponse(boost::system::error_code const&) (Connection.C:257)

==17884==    by 0x45BC10F: boost::asio::detail::write_handler<boost::asio::basic_stream_socket<boost::asio::ip::tcp, boost::asio::stream_socket_service<boost::asio::ip::tcp> >, std::vector<boost::asio::const_buffer, std::allocator<boost::asio::const_buffer> >, boost::asio::detail::transfer_all_t, boost::_bi::bind_t<void, boost::_mfi::mf1<void, http::server::Connection, boost::system::error_code const&>, boost::_bi::list2<boost::_bi::value<boost::shared_ptr<http::server::Connection> >, boost::arg<1> (*)()> > >::operator()(boost::system::error_code const&, unsigned int) (mem_fn_template.hpp:156)

==17884==    by 0x45BCBD1: boost::asio::detail::handler_queue::handler_wrapper<boost::asio::detail::binder2<boost::asio::detail::write_handler<boost::asio::basic_stream_socket<boost::asio::ip::tcp, boost::asio::stream_socket_service<boost::asio::ip::tcp> >, std::vector<boost::asio::const_buffer, std::allocator<boost::asio::const_buffer> >, boost::asio::detail::transfer_all_t, boost::_bi::bind_t<void, boost::_mfi::mf1<void, http::server::Connection, boost::system::error_code const&>, boost::_bi::list2<boost::_bi::value<boost::shared_ptr<http::server::Connection> >, boost::arg<1> (*)()> > >, boost::system::error_code, unsigned int> >::do_call(boost::asio::detail::handler_queue::handler*) (bind_handler.hpp:96)

==17884== 

==17884== 

==17884== For counts of detected and suppressed errors, rerun with: -v

==17884== Use --history-level=approx or =none to gain increased speed, at

==17884== the cost of reduced accuracy of conflicting-access information

==17884== ERROR SUMMARY: 35 errors from 9 contexts (suppressed: 9621 from 566)

35 errors!

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