Question 134459 in Visual Studio Code Question posted in
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Visual Studio Code – How do I run and debug Bash's source code through VS Code?

I would like to see how Bash implements command line argument parsing and stepping through the code as it parses some trivial command should be a good way to do that. How do I set this up? Bash is normally run with

./configure
make

which creates a bash executable in the top level directory of the source code. I wanted to run that executable though GDB but it doesn’t support M1 Macs so I was thinking to do it through VS Code but I don’t know where to start.

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  1. Chosen as BEST ANSWER
    0

    (on macOS)

    1. git clone https://git.savannah.gnu.org/git/bash.git

    2. Install the CodeLLDB VS Code extension

    3. Add a launch.json file with these contents (set args to the arguments you want to pass to the bash executable):

    {
    "version": "0.2.0",
    "configurations": [
        {
            "type": "lldb",
            "request": "launch",
            "name": "Debug",
            "program": "${workspaceFolder}/bash",
            "args": ["-c", "echo hello world"],
            "cwd": "${workspaceFolder}"
        }
    ]
}
    1. Compile bash (see the INSTALL file for details), which will generate an executable file called "bash":
    ./configure
make
    1. Add a breakpoint somewhere (for example in the main() function) and hit F5 to run the command

  2. 0

    To set up C/C++ debugging on VS Code, create a .vscode/launch.json file and fill in the arguments with whatever you need. See the docs here: https://code.visualstudio.com/docs/cpp/launch-json-reference.

    That being said, VS Code’s C/C++ debugger just hooks into an existing debugger like GDB or LLDB. If GDB can’t debug your program, try LLDB (might require building Bash with LLVM instead of GCC- not 100% sure). If that’s not an option, you might be out of luck with this exact question.

    For setup with LLDB, see How to debug in VS Code using lldb?.

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