[VSCode] WSL2에서 process에 attach모드로 debugging 안됨.

The futex facility returned an unexpected error code.

 

 

vscode에서 python extension을 통해 디버깅 기능 테스트 중,

 

launch로 동작은 문제 없으나, attach는 문제가 있음을 확인함.

 

wsl2 의 version

WSL version: 1.2.5.0
Kernel version: 5.15.90.1
WSLg version: 1.0.51
MSRDC version: 1.2.3770
Direct3D version: 1.608.2-61064218
DXCore version: 10.0.25131.1002-220531-1700.rs-onecore-base2-hyp
Windows version: 10.0.25393.1

 

linux distribution

$ cat /etc/*release*

PRETTY_NAME="Debian GNU/Linux 12 (bookworm)"
NAME="Debian GNU/Linux"
VERSION_ID="12"
VERSION="12 (bookworm)"
VERSION_CODENAME=bookworm
ID=debian
HOME_URL="https://www.debian.org/"
SUPPORT_URL="https://www.debian.org/support"
BUG_REPORT_URL="https://bugs.debian.org/"

 

---

우선 wsl2 이고 Debian distribution이 설치된 상태에서

 

mamba install debugpy 를 수행하여 debugpy를 설치한 이후,

 

다음으로 debug설정을 위한 launch.json을 만들고

{
    // 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": "Python: Attach using Process Id",
            "type": "python",
            "request": "attach",
            "processId": "${command:pickProcess}",
            "justMyCode": true
        },
        {
            "name": "Python: Current File (External Terminal)",
            "type": "python",
            "request": "launch",
            "program": "${file}",
            "console": "externalTerminal",
            "justMyCode": true
        }
    ]
}

 

다음의 code의 python script file을 local_script_debuggin.py로 저장한 후

import debugpy

# 5678 is the default attach port in the VS Code debug configurations. Unless a host and port are specified, host defaults to 127.0.0.1
debugpy.listen(5678)
print("Waiting for debugger attach")
debugpy.wait_for_client()
debugpy.breakpoint()
print('break on this line')

 

Terminal (wt.exe)에서 다음과 같이 python으로 위의 local_script_debugging.py를 수행하고

$  python local_script_deugging.py
0.00s - Debugger warning: It seems that frozen modules are being used, which may
0.00s - make the debugger miss breakpoints. Please pass -Xfrozen_modules=off
0.00s - to python to disable frozen modules.
0.00s - Note: Debugging will proceed. Set PYDEVD_DISABLE_FILE_VALIDATION=1 to disable this validation.
Waiting for debugger attach

vscode에서 Python: Attach using Process Id를 디버깅했더니 Debug CONSole에서는 다음과 같이 출력이 되고

python local_script_deugging.py을 수행한 터미널에서 다음과 같이 에러가 발생.

$ python local_script_deugging.py
0.00s - Debugger warning: It seems that frozen modules are being used, which may
0.00s - make the debugger miss breakpoints. Please pass -Xfrozen_modules=off
0.00s - to python to disable frozen modules.
0.00s - Note: Debugging will proceed. Set PYDEVD_DISABLE_FILE_VALIDATION=1 to disable this validation.
Waiting for debugger attach
The futex facility returned an unexpected error code.
Aborted

futex 관련 에러로 보이는데... WSL2의 문제로 보인다.
(구글링 후 몇가지를 시도해봤지만 어림없었음. ㅠㅠ)