OTA binary coredump

General Discussions
1

ubuntu@ubuntu:~/ota/datalink/ota-primary$ sudo gdb bin/ota-primary core.323786
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Reading symbols from bin/ota-primary…
[New LWP 323786]
[Thread debugging using libthread_db enabled]
Using host libthread_db library “/lib/x86_64-linux-gnu/libthread_db.so.1”.
Core was generated by `/home/ubuntu/ota/datalink/ota-primary/bin/ota-primary -c /home/ubuntu/ota/datal’.
Program terminated with signal SIGSEGV, Segmentation fault.
#0 0x000055ddeed5b682 in boost::shared_ptrboost::log::v2s_mt_posix::core::operator-> (this=0x0) at /home/ubuntu/code/ota-test/ota-third-party/x86_64_output/include/boost/smart_ptr/shared_ptr.hpp:784
784 /home/ubuntu/code/ota-test/ota-third-party/x86_64_output/include/boost/smart_ptr/shared_ptr.hpp: No such file or directory.
(gdb) bt
#0 0x000055ddeed5b682 in boost::shared_ptrboost::log::v2s_mt_posix::core::operator-> (this=0x0) at /home/ubuntu/code/ota-test/ota-third-party/x86_64_output/include/boost/smart_ptr/shared_ptr.hpp:784
#1 0x000055ddeed5d567 in boost::log::v2s_mt_posix::sources::basic_composite_logger<char, boost::log::v2s_mt_posix::sources::severity_loggerota::common::log::LogLevel, boost::log::v2s_mt_posix::sources::single_thread_model, boost::log::v2s_mt_posix::sources::features<boost::log::v2s_mt_posix::sources::severityota::common::log::LogLevel > >::open_record<boost::parameter::aux::tagged_argument_list_of_1<boost::parameter::aux::tagged_argument<boost::log::v2s_mt_posix::keywords::tag::severity, ota::common::log::LogLevel> > > (this=0x0, args=…) at /home/ubuntu/code/ota-test/ota-third-party/x86_64_output/include/boost/log/sources/basic_logger.hpp:575
#2 0x000055ddeed56f57 in ota::common::log::Logger::Log_ (this=0x55ddef17be80 ota::common::log::global_logger_, level=ota::common::log::LogLevel::Debug, message=“Stream::DoCancel()”)
at /mnt/hgfs/new-code/br_datalink/ota-primary/src/common/log/platform/boost/boost_log.cpp:159
#3 0x000055ddeea3bd5c in ota::common::log::Logger::Log (this=0x55ddef17be80 ota::common::log::global_logger_, level=ota::common::log::LogLevel::Debug, message=“Stream::DoCancel()”)
at /mnt/hgfs/new-code/br_datalink/ota-primary/src/common/log.hpp:134
#4 0x000055ddeed58025 in ota::common::log::Debug (message=“Stream::DoCancel()”) at /mnt/hgfs/new-code/br_datalink/ota-primary/src/common/log/platform/boost/boost_log.cpp:308
#5 0x000055ddee8878e6 in ota::http::Stream::DoCancel (this=0x55de0fda3f50) at /mnt/hgfs/new-code/br_datalink/ota-primary/src/common/http/platform/beast/http.cpp:1295
#6 0x000055ddee88722e in ota::http::Stream::~Stream (this=0x55de0fda3f50, __in_chrg=) at /mnt/hgfs/new-code/br_datalink/ota-primary/src/common/http/platform/beast/http.cpp:1249
#7 0x000055ddeeaa6e4e in std::_Sp_counted_ptr<ota::http::Stream*, (__gnu_cxx::_Lock_policy)2>::_M_dispose (this=0x55de0fdc65d0) at /usr/include/c++/11/bits/shared_ptr_base.h:348
#8 0x000055ddee75f5eb in std::_Sp_counted_base<(__gnu_cxx::_Lock_policy)2>::_M_release (this=0x55de0fdc65d0) at /usr/include/c++/11/bits/shared_ptr_base.h:168
#9 0x000055ddee75e819 in std::__shared_count<(__gnu_cxx::_Lock_policy)2>::~__shared_count (this=0x7fffcd626610, __in_chrg=) at /usr/include/c++/11/bits/shared_ptr_base.h:705
#10 0x000055ddee878b22 in std::__shared_ptr<ota::http::Stream, (__gnu_cxx::_Lock_policy)2>::~__shared_ptr (this=0x7fffcd626608, __in_chrg=) at /usr/include/c++/11/bits/shared_ptr_base.h:1154
#11 0x000055ddee878b42 in std::shared_ptrota::http::Stream::~shared_ptr (this=0x7fffcd626608, __in_chrg=) at /usr/include/c++/11/bits/shared_ptr.h:122
#12 0x000055ddee88efae in ~(void) (this=0x7fffcd626600, __in_chrg=) at /mnt/hgfs/new-code/br_datalink/ota-primary/src/common/http/platform/beast/http.cpp:1923
#13 0x000055ddee89f91e in boost::asio::detail::binder1<ota::http::Server::AsyncAccept(ota::http::Server::StreamPtr)::<lambda(const std::error_code&)>, boost::system::error_code>::~binder1(void) (this=0x7fffcd626600,
in_chrg=) at /home/ubuntu/code/ota-test/ota-third-party/x86_64_output/include/boost/asio/detail/bind_handler.hpp:139
#14 0x000055ddee89fa9d in boost::asio::detail::reactive_socket_accept_op<boost::asio::basic_socket<boost::asio::ip::tcp, boost::asio::any_io_executor>, boost::asio::ip::tcp, ota::http::Server::AsyncAccept(ota::http::Server::StreamPtr)::<lambda(const std::error_code&)>, boost::asio::any_io_executor>::do_complete(void *, boost::asio::detail::operation *, const boost::system::error_code &, std::size_t) (owner=0x0, base=0x55de0fda44d0)
at /home/ubuntu/code/ota-test/ota-third-party/x86_64_output/include/boost/asio/detail/reactive_socket_accept_op.hpp:158
#15 0x000055ddee771379 in boost::asio::detail::scheduler_operation::destroy (this=0x55de0fda44d0) at /home/ubuntu/code/ota-test/ota-third-party/x86_64_output/include/boost/asio/detail/scheduler_operation.hpp:45
#16 0x000055ddee7738a4 in boost::asio::detail::scheduler::shutdown (this=0x55de0fd99b60) at /home/ubuntu/code/ota-test/ota-third-party/x86_64_output/include/boost/asio/detail/impl/scheduler.ipp:176
#17 0x000055ddee770c57 in boost::asio::detail::service_registry::shutdown_services (this=0x55de0fd99b10) at /home/ubuntu/code/ota-test/ota-third-party/x86_64_output/include/boost/asio/detail/impl/service_registry.ipp:44
#18 0x000055ddee771191 in boost::asio::execution_context::shutdown (this=0x55ddef171ea8 <ota::primary::Singletonota::primary::HttpServer::GetInstance()::instance+40>)
at /home/ubuntu/code/ota-test/ota-third-party/x86_64_output/include/boost/asio/impl/execution_context.ipp:41
#19 0x000055ddee7741b6 in boost::asio::io_context::~io_context (this=0x55ddef171ea8 <ota::primary::Singletonota::primary::HttpServer::GetInstance()::instance+40>, __in_chrg=)
at /home/ubuntu/code/ota-test/ota-third-party/x86_64_output/include/boost/asio/impl/io_context.ipp:58

2

When I was using HTTPServer, the program exited and I encountered a bug in the log coredump。

3

Hope this helps to solve this log bug.

4

Hi @PrimeQH,

Can you please share some context plus details, and how this possibly relates to Mender?

Greetz,
Josef

5

HTTPServer was built using the common/http.hpp library. When HTTPServer exited, a log null pointer bug was found. In the function void Stream::DoCancel() {
…
log::Debug(“Stream::DoCancel()”);
…
}, a logger_ null pointer appeared, and then in the function
void Logger::Log_(LogLevel level, const string &message) {
if (this->logger_ == nullptr) {
std::cerr << “Logger is not initialized or destroyed before use” << std::endl;
return;
}
BOOST_LOG_SEV(*this->logger_, level) << message;
}
, a coredump was generated when writing the log.

6

I currently add a null pointer check before writing to avoid the generation of coredump。
@TheYoctoJester

7

@PrimeQH okay… you’re writing a HTTPServer and are using boost, but that’s really the only thing I gather here.

Greetz,
Josef

8

HTTPServer has a logger object, and the global Logger object is used to write logs, and finally the program exits.