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Windows Subsystem for Linux
With the Windows 10 Creators Update (Windows version 10.0.15063), you can use Visual Studio Code to debug .NET core applications on Windows Subsystem for Linux (WSL).
This page will walk you through the steps required to debug a .NET core application on WSL.
- Windows 10 Creators Update or newer with Windows Subsystem for Linux and Bash installed.
- .NET Core on WSL
- Visual Studio Code
- Microsoft C# extension for VSCode.
Go to .NET Core SDK Linux install instructions for steps to install the .NET Core SDK into WSL. Change the 'Linux Distribution' drop down to the version you have installed.
You can download a copy of the debugger with:
sudo apt-get install unzip
curl -sSL https://aka.ms/getvsdbgsh | bash /dev/stdin -v latest -l ~/vsdbg
This will download and install the debugger at ~/vsdbg/vsdbg
. This will be used later as the debuggerPath
.
VS Code uses json files to configure how your application is debugged (both for launch and attach) as well as built. There are two files that we need to configure --
- <your-open-folder>/.vscode/launch.json: This provides an array of different configurations you can use to launch your application. There is a drop down in the Debug view for selecting which configuration is active.
- <your-open-folder>/.vscode/tasks.json: This provides an array of different tasks, like building your application, that you can execute. Debug configurations can link to one of these tasks through the
preLaunchTask
property.
The rest of this page will provide examples of how launch.json and tasks.json should be configured to support WSL.
{
"name": ".NET Core WSL Launch",
"type": "coreclr",
"request": "launch",
"preLaunchTask": "publish",
"program": "/mnt/c/temp/dotnetapps/wslApp/bin/publish/wslApp.dll",
"args": [],
"cwd": "/mnt/c/temp/dotnetapps/wslApp",
"stopAtEntry": false,
"console": "internalConsole",
"pipeTransport": {
"pipeCwd": "${workspaceRoot}",
"pipeProgram": "bash.exe",
"pipeArgs": [ "-c" ],
"debuggerPath": "~/vsdbg/vsdbg"
}
}
{
"version": "2.0.0",
"tasks": [
...,
{
"label": "publish",
"command": "dotnet",
"type": "process",
"args": [
"publish",
"${workspaceFolder}/wslApp.csproj",
"/property:GenerateFullPaths=true",
"/consoleloggerparameters:NoSummary",
"-o",
"${workspaceFolder}/bin/publish"
]
}
]
}
The sample application shown here was created in the Windows path C:\temp\dotnetapps\wslApp
. WSL by default allows windows paths to be accessible through /mnt/<driveletter>/<path>
, so the path above is accessible as /mnt/c/temp/dotnetapps/wslApp
from WSL.
Notes:
-
preLaunchTask
executesdotnet publish
, which builds the project on Windows. Since coreclr is cross-platform, the binary can be executed on WSL without any extra work. -
pipeProgram
is set to bash.exe. -
debuggerPath
points to vsdbg, the coreclr debugger. - This will not support programs that want to read from the console.
{
"name": ".NET Core WSL Attach",
"type": "coreclr",
"request": "attach",
"processId": "${command:pickRemoteProcess}",
"pipeTransport": {
"pipeCwd": "${workspaceRoot}",
"pipeProgram": "bash.exe",
"pipeArgs": [ "-c" ],
"debuggerPath": "~/vsdbg/vsdbg",
"quoteArgs": true
}
}
Notes:
-
"processId": "${command:pickRemoteProcess}"
lists the processes running on WSL using the pipe program. -
quoteArgs
will quote any arguments and debugger commands with spaces if set totrue
. - Use
sourceFileMap
to map sources if they are available in a different location than where they were built. If you build your project in Linux, make sure to add a map from the /mnt drive letters. Example:"sourceFileMap": { "/mnt/c/": "c:\\" }
- File and paths are case sensitive in Linux.
Configuration
- Configuring Snap installs of dotnet-sdk
- Configuring Arch Linux for Unity development
- Configuring Arch Linux for Razor development
- Installing the .NET Core Debugger on Arch Linux
Debugger
- Overview
- launch.json Help
- Feature List
- Enable Logging
- Portable PDBs
- Troubleshoot Breakpoints
- Attaching to remote processes
- Remote Debugging On Linux-Arm
- Windows Subsystem for Linux
- Diagnosting 'Debug adapter process has terminated unexpectedly'
- Testing libicu compatibility on Linux
- Debugging into the .NET Runtime itself
- Debugging x64 processes on an arm64 computer
Documentation
- Change Log
- Branches and Releases
- Installing Beta Releases
- Installing without internet connectivity
- Linux Support
- Run/Debug Unit Tests
- Troubleshooting: 'The .NET Core SDK cannot be located.' errors
Developer Guide