remote debugging - remote server is different OS from local server

[weinand]

From @Loreton on March 2, 2018 15:47

• VSCode Version: 1.17.2
• OS Version: Windows 7

Steps to Reproduce:

1. prepare code on linux using netiface module
2. run debug from windows to remote linux
   When the local module (windows), in my case "netifaces", has different characteristics from remote module (linux) we get error reading the network interface caracteristics. Why? It should run remote code and not local code.
   Regards

Does this issue occur when all extensions are disabled?: Yes/No

Copied from original issue: microsoft/vscode#44932

[weinand]

From @vscodebot[bot] on March 2, 2018 15:47

(Experimental duplicate detection)
Thanks for submitting this issue. Please also check if it is already covered by an existing one, like:

• Window always on top when opened from a remote server (#37586)

[weinand]

From @isidorn on March 2, 2018 15:56

Sounds like a potential duplicate of the wsl issues, forwarding to @weinand

[weinand]

@Loreton How does your launch config look like?

[weinand]

From @Loreton on March 5, 2018 11:4

my main.py code

# ####################################
# #### R E M O T E  - Linux OS #############
# ####################################

# ******** D E B U G *********************************
import ptvsd
ptvsd.enable_attach("my_secret", address=('localhost', 3000))
ptvsd.wait_for_attach() # only in the remote node
# ******** D E B U G *********************************


import sys; sys.dont_write_bytecode = True
import  Source as Prj

myLibName = ['LnPyLib', 'DDNS_v2018-02-27.zip'] 
LnLib     = Prj.SPE.LibPath(myLibName, fDEBUG=False)



# ####################################
# #### L O C A L    Windows OS ############
# ####################################

# ******** D E B U G *********************************
import ptvsd
ptvsd.enable_attach("my_secret", address=('localhost', 3000))
# ptvsd.wait_for_attach() # only in the remote node
# ******** D E B U G *********************************


import sys; sys.dont_write_bytecode = True
import  Source as Prj

myLibName = ['LnPyLib', 'DDNS_v2018-02-27.zip']   **_<=== BreakPoint_**
LnLib     = Prj.SPE.LibPath(myLibName, fDEBUG=False)

Problem

When I start the debugger I can STEP just the first two line and the I get an error regarding a missing feature of netifaces module (AF_PACKET).

  File "y:\GIT-REPO\Python3\DDNS\__main__.py", line 79, in <module>
    Prj.Main(gv.args.firstPosParameter)
  File "y:\GIT-REPO\Python3\DDNS\Source\Main\DDNS_Main.py", line 83, in Main
    interfaces     = Ln.getInterfaces(dictType=Ln.Dict)
  File "y:\GIT-REPO\Python3\DDNS\LnPyLib\Net\InterfacesCl.py", line 418, in getInterfaces
    ifc = Interfaces(ifcName)
  File "y:\GIT-REPO\Python3\DDNS\LnPyLib\Net\InterfacesCl.py", line 116, in __init__
    self.arpPing(self._gatewayIpAddress)
  File "y:\GIT-REPO\Python3\DDNS\LnPyLib\Net\InterfacesCl.py", line 319, in arpPing
    macAddressHex   =  bytes.fromhex(self._MAC_address.replace(':',''))
AttributeError: 'NoneType' object has no attribute 'replace'

But this feature is missed just in windows module and not in linux one.
In any case:

1. it doesn't stop in the breakpoint line.
2. the TCP connection to remote machine NOT starts

launch extract configuration

   "configurations": [
        {
            "name": "Python",
            "type": "python",
            "request": "launch",
            "stopOnEntry": true,
            "pythonPath": "${config:python.pythonPath}",
            "program": "${file}",
            "cwd": "${workspaceRoot}",
            "env": {},
            "envFile": "${workspaceRoot}/.env",
            "debugOptions": [
                // "WaitOnAbnormalExit",
                // "WaitOnNormalExit",
                "RedirectOutput"
            ],
            "args": [
                "update",
                "--profile",
                "LnPi23"
            ]
        },
    ....
    i have the following tunnel ssh -L 3001:destMaschine:3000 
        {
            "name": "Attach (Remote Debug)",
            "type": "python",
            "request": "attach",
            "localRoot": "${workspaceRoot}",
            "remoteRoot": "/home/pi/GIT-REPO/Python3/DDNS",
            "port": 3001,    
            "secret": "my_secret",
            "host": "localhost"
        }
    ]

Kind Regards

[DonJayamanne]

@lorento
Please could you change the remote python file being debugged as follows:

my main.py code

import ptvsd
ptvsd.enable_attach("my_secret", address=('localhost', 3000))
ptvsd.wait_for_attach()


print("attached")
a = input()
print("something entered")    # **_<=== BreakPoint_**
print("End")                  # **_<=== BreakPoint_**

• Run the above file on the remote linux computer in a terminal window
• Ensure the above file is also available on the local widows computer
• Go into your local windows computer
• Add a break point to the line print("something entered") and the line after as well
• Select Attach (Remote Debug) and run that.
  Note: None of the Python code gets executed locally on your windows machine.

[Loreton]

Hi Don,
reading your last update, when you said:

"Select Attach (Remote Debug) and run that."

I realized I had omitted something important. I didn't select the configuration type to be used for debugging. I left the default. Selecting the right configuration it works fine and very fast.
I am very sorry to have bothered You for my mistake.
Thanks for Your support and best compliments for this product that I'm starting to discover.
It's OK for me. Problem is solved.
Regards
Loreto