Reading a static variable in an Azure App Service

Visit the Kudu site

The URL for a Kudo site is normally just https://contoso-images.azurewebsites.net with scm put inbetween the host and the .azurewebsites.net bit.

So https://contoso-images.azurewebsites.net becomes https://contoso-images.scm.azurewebsites.net.

You can otherwise use the handy script below:

$name = "contoso-images"

$id = az webapp list --query "[?name=='$name'].id | [0]"
$url = az webapp show --id $id --query "hostNameSslStates[?hostType=='Repository'].name | [0]" --output tsv

Start-Process ("https://" + $url)

Generate a full memory dump

Inside of Kudu's online interface, goto Debug Console -> Powershell via the menu at the top, then use the following script to generate a memory dump. The SysInternals tools are alreay installed on the machines by default.

$targetPID = (Get-Process | Sort-Object -Property "StartTime" | Select-Object -First 1).ID

& "D:\devtools\sysinternals\procdump" -accepteula -ma $targetPID

It will take a little bit to dump the memory to a local file. Which you can then download by clicking the icon circled below:

Download all the code

Using the same window as above, click on site, then click on the download button next to wwwroot.

This will download a ZIP of the code running on the site.

Use dotPeek to decompile the C# Project

Install dotPeek however you like, then start it up and follow these steps:

Add the files downloaded from Kudu to dotPeek .

Start the Symbol Server

Start the Symbol Server using the button shown below:

Open the memory dump and set the symbol server

Open the memory dump in Visual Studio. Use the option Set symbol paths to open the Options menu, then the + to add the dotPeek url http://localhost:33417 to the studio.

Start Debug with Managed Only

Use the button top-right Debug with Managed Only, which'll start-up the debug instance. This will look like you've hit a breakpoint, but without any code showing.

Swap thread to... something

Honestly I have no idea what this is for. But go to Debug -> Threads, then pick any thread that has text next to it.

Use the immediate window to show the static variable

Open the Debug -> Immediate Window, then, in the new Immediate Window type the full name of the static variable you'd like to read.