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User forums => Help => Topic started by: MadDavid on July 28, 2026, 10:41:33 pm

Title: Debugger lldb.exe exits without running target executable
Post by: MadDavid on July 28, 2026, 10:41:33 pm

I'm trying to get LLVM CLANG working with Code::Blocks.

I've got basic compilation working, now I'm trying to get debugging working.

So I set up a test project called "TestConsoleDebugger", which has the following code

Quote

#include <iostream>
#include <cstdio>

int main()
{
int iterations = 0;
FILE* fp;

while (iterations < 1000000)
{
iterations++;
}

fp = fopen("Debug.txt", "a+");
fprintf(fp, "Iterations = %i\n", iterations);
fflush(fp);
fclose(fp);
return 0;
}

and breakpoints on "iteration++;" and "fp = fopen("Debug.txt", "a+");

When I click the red "Debug / Continue" arrow, I get

Quote

Active debugger config: GDB/CDB debugger:LLVM 64
Building to ensure sources are up-to-date
Selecting target:
Debug
Adding source dir: E:\Development\TestConsoleDebugger\
Adding source dir: E:\Development\TestConsoleDebugger\
Adding file: E:\Development\TestConsoleDebugger\bin\Debug\TestConsoleDebugger.exe
Changing directory to: E:/Development/TestConsoleDebugger/.
Set variable: PATH=.;E:\Compilers\LLVM\bin;E:\Compilers\LLVM;[bunch of irrelevant paths]E:\Compilers\CodeBlocks;\;E:\Compilers\TDM-GCC-64\bin;E:\Compilers\WinSDK\Windows Performance Toolkit;E:\Compilers\Python310\Scripts;E:\Compilers\Python310;E:\Compilers\CodeBlocks\MinGW\bin;E:\Compilers\VisualStudio\VC\Tools\MSVC\14.31.31103\bin\Hostx64\x64;E:\Compilers\Zip
Starting debugger: E:\Compilers\LLVM\bin\lldb.exe -G -lines -2 -y E:/Development/TestConsoleDebugger/; -srcpath E:/Development/TestConsoleDebugger/; E:/Development/TestConsoleDebugger/bin/Debug/TestConsoleDebugger.exe
done
Debugger finished with status 1
Selecting target:
Debug
Adding source dir: E:\Development\TestConsoleDebugger\
Adding source dir: E:\Development\TestConsoleDebugger\
Adding file: E:\Development\TestConsoleDebugger\bin\Debug\TestConsoleDebugger.exe
Changing directory to: E:/Development/TestConsoleDebugger/.
Set variable: PATH=.;E:\Compilers\LLVM\bin;E:\Compilers\LLVM;[bunch of irrelevant paths]E:\Compilers\CodeBlocks;\;E:\Compilers\TDM-GCC-64\bin;E:\Compilers\WinSDK\Windows Performance Toolkit;E:\Compilers\Python310\Scripts;E:\Compilers\Python310;E:\Compilers\CodeBlocks\MinGW\bin;E:\Compilers\VisualStudio\VC\Tools\MSVC\14.31.31103\bin\Hostx64\x64;E:\Compilers\Zip
Starting debugger: E:\Compilers\LLVM\bin\lldb.exe -G -lines -2 -y E:/Development/TestConsoleDebugger/; -srcpath E:/Development/TestConsoleDebugger/; E:/Development/TestConsoleDebugger/bin/Debug/TestConsoleDebugger.exe
done
Debugger finished with status 1

Code::Blocks does not stop at any breakpoints, the console does not appear, and notably, "Debug.txt" does not appear. When I click the green "Run" arrow, in contrast, it pops up the console and "Debug.txt" appears in the project directory.

Is there any advice for how to get lldb to actually debug from Code::Blocks? E.g., do I need to put anything in for "Debugger initialization commands" in the debugger setting?

Title: Re: Debugger lldb.exe exits without running target executable
Post by: Miguel Gimenez on July 29, 2026, 02:55:02 pm

Quote

Debugger finished with status 1

This means the debugger found an error and quit without executing your program at all. C::B expects GDB or CDB as debugger, not LLDB, and it uses commands specific for them that LLDB does not understand. Also, it parses answers using regex that will fail with LLDB.

Title: Re: Debugger lldb.exe exits without running target executable
Post by: MadDavid on July 29, 2026, 07:29:23 pm

Thanks for your reply. As I understand it, there's no way to get the LLVM debugger to work with code::blocks (barring going into the C::B source code and implementing support). Is that correct?

Title: Re: Debugger lldb.exe exits without running target executable
Post by: Pecan on July 29, 2026, 09:38:38 pm

Quote from: MadDavid on July 29, 2026, 07:29:23 pm

Thanks for your reply. As I understand it, there's no way to get the LLVM debugger to work with code::blocks (barring going into the C::B source code and implementing support). Is that correct?

There is already a debugger being developed for CodeBlocks that supports llvm.
The debugger_DAP source is at https://github.com/pecanh/debugger_DAP.
The setup for the debugger is the same as for debugger_gdb or debugger_gdbmi.

Once the plugin is loaded by CodeBlocks, a settings/debugger entry will appear and you will have
to set the location of your debugger (see attachment).

You also have to decide what flavor of breakpoint.symbols to use.

The ususal -g flag alone will not work for llvm.
You have to match the compiler with the gdb symbol types expected.

Look into the compiler setup for the llvm flag types.

Place the source of the debugger_DAP into the contrib plugin folder.
Review the .cbp file to fit your environment.
Compile and place the plugin into the output32_xx.plugin folder or into the devel32_xx folder to test.
You can use the regular debugger_gdb or debugger_gdbmi to debug debugger_DAP if necessary.

Title: Re: Debugger lldb.exe exits without running target executable
Post by: everSome on August 06, 2026, 04:12:03 am

You can always check to see what your clang installation defaults to via

Code

clang -### -x c /dev/null

Code

clang -### -x c++ /dev/null

. If you see something other than

Code

"-debugger-tuning=gdb"

, you can override you installation's default via the options

Code

-ggdb

, or one of the other gdb variants

Code

-ggdb1, -ggdb2, ggdb3, etc

. If using an MSYS2 environment on Windows, you'll find that clang in these environments is setup to use gdb by default.

Code::Blocks Forums

User forums => Help => Topic started by: MadDavid on July 28, 2026, 10:41:33 pm