Debugging other PowerShell processes

A PowerShell developer can make use of Enter-PSHostProcess to debug a script running in a different PowerShell process.

The Enter-PSHostProcess command creates a remote runspace inside an existing PowerShell process.

Demonstrating use requires two PowerShell processes. The first PowerShell process is started, and for convenience, the PID of that process is shown.

A simple infinite loop is started after setting the window title to show the current PID:

$host.UI.RawUI.WindowTitle = 'Script runner: {0}' -f $PID $i = 0 while ($true) { Write-Host "Working on $i" $i++ Start-Sleep -Seconds 30 } 

In the example that follows, the first process showed a PID of 14504 and is used to connect to that process. This PID will be different in each case.

A second process is started and the Enter-PSHostProcess command is used to connect to the original PID. The prompt will change to reflect the connection to...