How to create a serial pipe between a windows host and virtual machine in VirtualBox?

I am trying to debug the kernel of a windows 7 virtual machine and am following the steps here, here and here.

I ran:

bcdedit /debug on
bcdedit /dbgsettings serial debugport:n baudrate:115200 

on the virtual machine and have set up the port to a named pipe:

but when I reboot the machine I get:

How can I create the pipe inside the guest machine (both the host and the guest are running windows 7)?

2 Answers

You set Host pipe. It means you need to fill pipe name like this: \.\pipe\VirtualMachineName

Moreover, as Robin Hood mentioned you need to uncheck Connect to existing pipe/socket it helps don't create a pipe manually. After launch Virtual machine you can check created pipe via pipelist application. You should see VirtualMachineName on the list.

C:\Windows\system32>pipelist64.exe
...
pipe_returnb2848f45-49cf-444b-85a1-04af7fe5606e 1 128
mojo.9004.8732.10216662671524970515 1 1
mojo.9004.9560.12163195199288806074 1 1
mojo.9004.9560.2084235546261883787 1 1
VirtualMachineName 1 1

You can read what is pipe here. A pipe isn't a simple file.

it is not an existing port, uncheck connect to existing pipe, so it creates a new one.

Thanks