Cannot pause execution or trigger breakpoints

[johannesstricker]

Hi, I'm using this on Windows 10 with an executable created with the Visual Studio 15 compiler. My program ist just a simple main function. I can start the debugging process and I get console output ('[New Thread XXX.XXX]' for example), however there is no way to pause execution. If I hit the pause button nothing happens and my breakpoints don't trigger.

GDB version is 7.11.1 configured as i686-w64-mingw32

[ProPuke]

Breakpoints won't work if your executable isn't compiled with debug symbols (that gdb understands). So it could be a case of not compiling in debug mode (or perhaps needing a special flag to support gdb with vs). I do believe pausing should still work if the executable is active, though, with or without debug info. So I'm not sure there.

Could you enable logging for dbg-gdb and paste the output here so I can see what's going wrong?

To do so..

• Navigate to Edit > Preferences > Packages > dbg-gdb > Settings and enable Log to developer console
• Select View > Developer > Toggle Developer Tool
• Try to debug your program
• Paste the contents of the Console in Developer Tools

[johannesstricker]

Hi, sorry this took me so long. So I have a very basic project:

int main(int argc, char** argv)
{
  std::cout << "Hello world." << std::endl; // breakpoint on this line
  return 0;
}

I use cmake to create and build the project files with -DCMAKE_BUILD_TYPE=Debug and -DCMAKE_GENERATOR="Visual Studio 14 2015".

Below is the console output for a single debug run.

dbg-gdb >  -file-exec-and-symbols C:/Users/johan/Desktop/test/build/Debug/example.exe
main.coffee:220 dbg-gdb <  = thread-group-added Object {id: "i1"}
main.coffee:220 dbg-gdb <  ^ done Object {}
main.coffee:446 dbg-gdb >  -gdb-set mi-async on
main.coffee:220 dbg-gdb <  ^ done Object {}
main.coffee:446 dbg-gdb >  -break-insert C:/Users/johan/Desktop/test/main.cpp:7
main.coffee:220 dbg-gdb <  ^ error Object {msg: "No symbol table is loaded.  Use the "file" command."}
main.coffee:446 dbg-gdb >  -exec-arguments 
main.coffee:220 dbg-gdb <  ^ done Object {}
main.coffee:446 dbg-gdb >  -exec-run
main.coffee:220 dbg-gdb <  = thread-group-started Object {id: "i1", pid: "20624"}
main.coffee:220 dbg-gdb <  = thread-created Object {id: "1", group-id: "i1"}
main.coffee:232 dbg-gdb <  ~ [New Thread 20624.0x3988]

main.coffee:220 dbg-gdb <  = thread-created Object {id: "2", group-id: "i1"}
main.coffee:232 dbg-gdb <  ~ [New Thread 20624.0x4748]

main.coffee:220 dbg-gdb <  = thread-created Object {id: "3", group-id: "i1"}
main.coffee:232 dbg-gdb <  ~ [New Thread 20624.0x57f4]

main.coffee:220 dbg-gdb <  = thread-created Object {id: "4", group-id: "i1"}
main.coffee:232 dbg-gdb <  ~ [New Thread 20624.0x1374]

main.coffee:220 dbg-gdb <  = library-loaded Object {id: "C:\WINDOWS\SYSTEM32\ntdll.dll", target-name: "C:\WINDOWS\SYSTEM32\ntdll.dll", host-name: "C:\WINDOWS\SYSTEM32\ntdll.dll", symbols-loaded: "0", thread-group: "i1"}host-name: "C:\WINDOWS\SYSTEM32\ntdll.dll"id: "C:\WINDOWS\SYSTEM32\ntdll.dll"symbols-loaded: "0"target-name: "C:\WINDOWS\SYSTEM32\ntdll.dll"thread-group: "i1"__proto__: Object
main.coffee:220 dbg-gdb <  = library-loaded Object {id: "C:\WINDOWS\System32\kernel32.dll", target-name: "C:\WINDOWS\System32\kernel32.dll", host-name: "C:\WINDOWS\System32\kernel32.dll", symbols-loaded: "0", thread-group: "i1"}
main.coffee:220 dbg-gdb <  = library-loaded Object {id: "C:\WINDOWS\System32\KernelBase.dll", target-name: "C:\WINDOWS\System32\KernelBase.dll", host-name: "C:\WINDOWS\System32\KernelBase.dll", symbols-loaded: "0", thread-group: "i1"}
main.coffee:220 dbg-gdb <  = library-loaded Object {id: "C:\WINDOWS\SYSTEM32\vcruntime140d.dll", target-name: "C:\WINDOWS\SYSTEM32\vcruntime140d.dll", host-name: "C:\WINDOWS\SYSTEM32\vcruntime140d.dll", symbols-loaded: "0", thread-group: "i1"}
main.coffee:220 dbg-gdb <  = library-loaded Object {id: "C:\WINDOWS\SYSTEM32\msvcp140d.dll", target-name: "C:\WINDOWS\SYSTEM32\msvcp140d.dll", host-name: "C:\WINDOWS\SYSTEM32\msvcp140d.dll", symbols-loaded: "0", thread-group: "i1"}
main.coffee:220 dbg-gdb <  = library-loaded Object {id: "C:\WINDOWS\SYSTEM32\ucrtbased.dll", target-name: "C:\WINDOWS\SYSTEM32\ucrtbased.dll", host-name: "C:\WINDOWS\SYSTEM32\ucrtbased.dll", symbols-loaded: "0", thread-group: "i1"}
main.coffee:220 dbg-gdb <  ^ running Object {}
main.coffee:220 dbg-gdb <  * running Object {thread-id: "all"}
main.coffee:238 dbg-gdb <  Hello world.
main.coffee:220 dbg-gdb <  = library-loaded Object {id: "C:\WINDOWS\SysWOW64\kernel.appcore.dll", target-name: "C:\WINDOWS\SysWOW64\kernel.appcore.dll", host-name: "C:\WINDOWS\SysWOW64\kernel.appcore.dll", symbols-loaded: "0", thread-group: "i1"}
main.coffee:220 dbg-gdb <  = library-loaded Object {id: "C:\WINDOWS\SysWOW64\msvcrt.dll", target-name: "C:\WINDOWS\SysWOW64\msvcrt.dll", host-name: "C:\WINDOWS\SysWOW64\msvcrt.dll", symbols-loaded: "0", thread-group: "i1"}
main.coffee:220 dbg-gdb <  = library-loaded Object {id: "C:\WINDOWS\SysWOW64\rpcrt4.dll", target-name: "C:\WINDOWS\SysWOW64\rpcrt4.dll", host-name: "C:\WINDOWS\SysWOW64\rpcrt4.dll", symbols-loaded: "0", thread-group: "i1"}
main.coffee:220 dbg-gdb <  = library-loaded Object {id: "C:\WINDOWS\SysWOW64\sspicli.dll", target-name: "C:\WINDOWS\SysWOW64\sspicli.dll", host-name: "C:\WINDOWS\SysWOW64\sspicli.dll", symbols-loaded: "0", thread-group: "i1"}
main.coffee:220 dbg-gdb <  = library-loaded Object {id: "C:\WINDOWS\SysWOW64\cryptbase.dll", target-name: "C:\WINDOWS\SysWOW64\cryptbase.dll", host-name: "C:\WINDOWS\SysWOW64\cryptbase.dll", symbols-loaded: "0", thread-group: "i1"}
main.coffee:220 dbg-gdb <  = library-loaded Object {id: "C:\WINDOWS\SysWOW64\bcryptprimitives.dll", target-name: "C:\WINDOWS\SysWOW64\bcryptprimitives.dll", host-name: "C:\WINDOWS\SysWOW64\bcryptprimitives.dll", symbols-loaded: "0", thread-group: "i1"}
main.coffee:220 dbg-gdb <  = library-loaded Object {id: "C:\WINDOWS\SysWOW64\sechost.dll", target-name: "C:\WINDOWS\SysWOW64\sechost.dll", host-name: "C:\WINDOWS\SysWOW64\sechost.dll", symbols-loaded: "0", thread-group: "i1"}
main.coffee:232 dbg-gdb <  ~ [Thread 20624.0x1374 exited with code 0]

main.coffee:220 dbg-gdb <  = thread-exited Object {id: "4", group-id: "i1"}
main.coffee:232 dbg-gdb <  ~ [Thread 20624.0x57f4 exited with code 0]

main.coffee:220 dbg-gdb <  = thread-exited Object {id: "3", group-id: "i1"}
main.coffee:232 dbg-gdb <  ~ [Thread 20624.0x4748 exited with code 0]

main.coffee:220 dbg-gdb <  = thread-exited Object {id: "2", group-id: "i1"}
main.coffee:232 dbg-gdb <  ~ [Inferior 1 (process 20624) exited normally]

main.coffee:220 dbg-gdb <  = thread-exited Object {id: "1", group-id: "i1"}
main.coffee:220 dbg-gdb <  = thread-group-exited Object {id: "i1", exit-code: "0"}
main.coffee:220 dbg-gdb <  * stopped Object {reason: "exited-normally"}

[ProPuke]

Yeah, there's no debug symbols in that executable for some reason.

Despite being built in debug mode, vs is not generating debug symbols that gdb understands.

It might be that there's a switch the vc compiler needs to enable this, and cmake needs a specific setting to know to do this, but I'm not sure what that is.

Sorry for the vagueness of this answer.

[johannesstricker]

Thanks, now that you say it I can make sense of the missing symbol table. I thought I had this working a year ago using Sublime Text, but I might have compiled with gcc back then.