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debugging/windows-debugging.md
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@ -15,7 +15,7 @@ Debugging Windows code can be tricky in a virtualized environment. The guide bel
User-mode debugging is usually straightforward if it can be done on one machine. Just duplicate your normal debugging environment in the VM.
Things get complicated if you need to perform kernel debugging or troubleshoot problems that only manifest on system boot, user logoff or similar. For that you need two Windows VMs: the *host* and the *target*. The *host* will contain [WinDbg](http://msdn.microsoft.com/en-us/library/windows/hardware/ff551063(v=vs.85).aspx) installation, your source code and private symbols. The *target* will run the code being debugged. Both will be linked by virtual serial ports.
Things get complicated if you need to perform kernel debugging or troubleshoot problems that only manifest on system boot, user logoff or similar. For that you need two Windows VMs: the *host* and the *target*. The *host* will contain [WinDbg](https://msdn.microsoft.com/en-us/library/windows/hardware/ff551063(v=vs.85).aspx) installation, your source code and private symbols. The *target* will run the code being debugged. Both will be linked by virtual serial ports.
- First, you need to prepare separate copies of both *target* and *host* VM configuration files with some changes. Copy the files from **/var/lib/qubes/appvms/vmname/vmname.conf** to some convenient location, let's call them **host.conf** and **target.conf**.
- In both copied files add the following line at the end: `serial = 'pty'`. This will make Xen connect VM's serial ports to dom0's ptys.