Can't get information in main()

[diehard2]

So, this is strange. I'm using boost::stacktrace with libbacktrace, but I've reproduced it on a smaller scale with libbacktrace directly. Everything but information on my main() is showing up correctly (in my limited testing)

For instance, these are my stacktraces at two different points

         0# foo::throw_fds_exception<foo::FOOException>::throw_exception() at /home/dev/BAR/build/vcpkg_installed/bar/include/foo-exception/foo_exception.h:109
         1# main in build/Debug/bin/broker
         2# __libc_start_call_main at ../sysdeps/nptl/libc_start_call_main.h:58
         3# __libc_start_main at ../csu/libc-start.c:379
         4# _start in build/Debug/bin/broker

and

           0# foo::throw_fds_exception<foo::FOOException>::throw_exception() at /home/dev/BAR/build/vcpkg_installed/bar/include/foo-exception/foo_exception.h:109
         1# InitializeLogger(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) at /home/dev/FOO/foo/logging_helper.h:25
         2# main in build/Debug/bin/broker
         3# __libc_start_call_main at ../sysdeps/nptl/libc_start_call_main.h:58
         4# __libc_start_main at ../csu/libc-start.c:379
         5# _start in build/Debug/bin/broker

I'm using gcc 13.1 and these are in a debug build. I'm running Ubuntu 22.04 in a docker container. My options are below.

add_compile_options(
  "-Wno-unknown-pragmas" "-fexceptions" "-ggdb" "-DFDS_EXPORT= " "-DFDS_EXPORT_CLASS=class " "-DBOOST_ALLOW_DEPRECATED_HEADERS " "-fPIC" "-rdynamic"
  "-Wno-attributes" "-DBOOST_BIND_GLOBAL_PLACEHOLDERS " "-Wno-unused-result" "-Wno-deprecated-declarations" "-fdata-sections" "-ffunction-sections" "-g3" "-pthread"
  "-DXXH_INLINE_ALL " "-fno-omit-frame-pointer"
  "$<$<CONFIG:DEBUG>:-O0>"
  "$<$<CONFIG:DEBUG>:-D_DEBUG>"
  "$<$<CONFIG:RELEASE>:-Ofast>"
  "$<$<CONFIG:RELEASE>:-DRAPIDJSON_SSE42 >"
  "$<$<CONFIG:RELEASE>:-march=skylake>"
  "$<$<CONFIG:RELEASE>:-DNDEBUG>"
)

I'm pretty sure the "main in build/Debug/bin/broker" is a nicety added by boost. In my reproducer I'm seeing 0x561dd7eb9cf5. (null):0: function - Any help would be appreciated here

[diehard2]

looking a little closer, I can use libbacktrace to get the function name and offset if I use backtrace_syminfo() using the same backtrace_state, so it knows that main() exists

[diehard2]

it is giving the correct stacktrace in Release

[ianlancetaylor]

Sorry, I don't know what is happening. This kind of problem is essentially impossible for me to debug unless I can reproduce it myself. The most likely cause is that the file containing the main function was compiled without -g.

The fact that backtrace_syminfo succeeds doesn't tell us much, as backtrace_syminfo does not require the debug info produced by -g. In particular, backtrace_syminfo doesn't report the file and line number.

[ianlancetaylor]

Without more information there is nothing I can do. Please comment if there is some way to make progress.