How to debug Linux Programs throwing qemu

[super-pixel-coder]

There are programs built to binary files and we use qemu to run it, so How can I debug it with qemu throwing this extension.
The launch.json file is like that:

{
    // Use IntelliSense to learn about possible attributes.
    // Hover to view descriptions of existing attributes.
    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
    "version": "0.2.0",
    "configurations": [
        {
            "name": "(gdb) Launch",
            "type": "cppdbg",
            "request": "launch",
            "miDebuggerServerAddress": "127.0.0.1:1234",
            "program": "${workspaceRoot}/build/kernel.bin",
            "args": [],
            "stopAtEntry": false,
            "cwd": "${fileDirname}",
            "environment": [],
            "externalConsole": false,
            "MIMode": "gdb",
        }
        
    ]
}

But it seems not work well

[xuming]

You should use by-gdb not cppdbg