Remote debug a rust process as sudo

[MarioHewardt]

OS: 5.11.0-41-generic #45~20.04.1-Ubuntu SMP Wed Nov 10 10:20:10 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
VSCode version: 1.70.2
CodeLLDB version: 1.8.1
Compiler: rustc 1.64.0 (a55dd71d5 2022-09-19)
Debuggee: compiled rust program that needs to run as sudo in the debug session

I am able to debug my target rust app in VS code using CodeLLDB when the target app runs non-privileged. However, I need to debug the target process running as sudo (as it is a requirement). Is there any way to do this using this extension?

[vadimcn]

Currently the only way to do that is via remote debugging, i.e. launch lldb-server as root, connect to it from codelldb, etc.

[VioletFlare]

I am experiencing the same problem, trying to run lldb-server with sudo doesn't elevate it's privileges. Neither running it in a root session...
It would be nice to explain in the documentation how to configure the remote debugger to run as root.

[vadimcn]

Dunno, folks - the following works for me:

sudo lldb-server-15 platform --server --listen *:1234 (or, you can use the one from extension, ~/.vscode/extensions/vadimcn.vscode-lldb-1.11.4/lldb/bin/lldb-server)

{
	"name": "apt update",
	"type": "lldb",
	"request": "launch",
	"program": "/usr/bin/apt",
	"args": ["update"],
	"initCommands": [
		"platform select remote-linux",
		"platform connect connect://127.0.0.1:1234",
	]
}

You can try adding "platform settings -w /tmp" in case it picks invalid working directory.

[VioletFlare]

Hi @vadimcn , thanks a lot for getting back with a reply :)

I've modified the config as you suggested:

{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "apt install linux-headers",
            "type": "lldb",
            "request": "launch",
            "program": "${workspaceFolder}/build/cmdline/apt-get",
            "args": ["install", "linux-headers"],
            "initCommands": [
                "platform select remote-linux",
                "platform connect connect://127.0.0.1:1234",
                "platform settings -w /tmp"
            ]
        }
    ]
}

This is how I am running lldb-server:

sudo ~/.vscode-oss/extensions/vadimcn.vscode-lldb-1.11.4/lldb/bin/lldb-server platform --server --listen *:1234

Still no progress here.

Running Debian Bookworm and vscodium (installed via a .deb package, not the snap version)

I am going to install vscode and see if I still have the same issue...

//Edit: Installed VSCode and ran the extension there, still no solution unfortunately.

[vadimcn]

I would check that the process is indeed launched as root. Does it work as expected when running without a debugger?

[VioletFlare]

Thanks @vadimcn, you made me realize the problem. Turns out the program was accessing nonexistent files, but was suggesting also I wasn't root which confused me... >_>

I feel silly now, but thanks to your help I can run it now as sudo!