4 ms·

How do you attach kd to VM? While I was at MS, it was such a big PITA - we just had a bunch of IT managed machines with KVM console access and KDNET for debugg

by zeusk 3y ago

How do you attach kd to VM? While I was at MS, it was such a big PITA - we just had a bunch of IT managed machines with KVM console access and KDNET for debugging.

EvanAnderson 3y ago
In Hyper-V it's fairly easy. You make a virtual serial port ("COMPort"), set the bootloader to enable kernel debugging over serial, then connect to the virtual serial port from the host via a named pipe. https://learn.microsoft.com/en-us/windows-hardware/drivers/debugger/attaching-to-a-virtual-machine--kernel-mode- https://learn.microsoft.com/en-us/windows-hardware/drivers/d... I haven't tried it with vSphere but I suspect it'd be similar.
- jasomill 3y ago
  Kernel debugging over serial should be possible in vSphere, but Ethernet is easier to set up: 1. Make sure at least one virtual NIC on the target VM (with IP connectivity to the debug host machine/VM) is on Microsoft's NIC whitelist[1]. I use e1000e; note that vmxnet3 is not on the list. 2. Follow Microsoft's directions[2] to connect. I can confirm this works on vSphere[3] and there's no reason it shouldn't also work on VMware Workstation, Player, and Fusion. [1] https://learn.microsoft.com/en-us/windows-hardware/drivers/debugger/supported-ethernet-nics-for-network-kernel-debugging-in-windows-10 https://learn.microsoft.com/en-us/windows-hardware/drivers/d... [2] https://learn.microsoft.com/en-us/windows-hardware/drivers/debugger/setting-up-a-network-debugging-connection-automatically https://learn.microsoft.com/en-us/windows-hardware/drivers/d... [3] Tested last week with a Windows Server 2022 target (e1000e virtual NIC) and Windows 10 debug host (vmxnet3 virtual NIC), both running on ESXi 8.0 Update 1 VM hosts.
- vlovich123 3y ago
  Delphi 7 was 2002. Was hyper-v around back then? Or is this just a legacy app still running?
  - EvanAnderson 3y ago
    Hyper-V wasn't until Windows Server 2008. I know you could do virtual serial ports w/ VMware GSX and ESX (and later ESXi) forwarded to real hardware serial ports on the host.
  - alex7734 3y ago
    It's a legacy app

by zeusk 3y ago

How do you attach kd to VM? While I was at MS, it was such a big PITA - we just had a bunch of IT managed machines with KVM console access and KDNET for debugging.

EvanAnderson 3y ago

In Hyper-V it's fairly easy. You make a virtual serial port ("COMPort"), set the bootloader to enable kernel debugging over serial, then connect to the virtual serial port from the host via a named pipe. https://learn.microsoft.com/en-us/windows-hardware/drivers/debugger/attaching-to-a-virtual-machine--kernel-mode- https://learn.microsoft.com/en-us/windows-hardware/drivers/d... I haven't tried it with vSphere but I suspect it'd be similar.

jasomill 3y ago
Kernel debugging over serial should be possible in vSphere, but Ethernet is easier to set up: 1. Make sure at least one virtual NIC on the target VM (with IP connectivity to the debug host machine/VM) is on Microsoft's NIC whitelist[1]. I use e1000e; note that vmxnet3 is not on the list. 2. Follow Microsoft's directions[2] to connect. I can confirm this works on vSphere[3] and there's no reason it shouldn't also work on VMware Workstation, Player, and Fusion. [1] https://learn.microsoft.com/en-us/windows-hardware/drivers/debugger/supported-ethernet-nics-for-network-kernel-debugging-in-windows-10 https://learn.microsoft.com/en-us/windows-hardware/drivers/d... [2] https://learn.microsoft.com/en-us/windows-hardware/drivers/debugger/setting-up-a-network-debugging-connection-automatically https://learn.microsoft.com/en-us/windows-hardware/drivers/d... [3] Tested last week with a Windows Server 2022 target (e1000e virtual NIC) and Windows 10 debug host (vmxnet3 virtual NIC), both running on ESXi 8.0 Update 1 VM hosts.
vlovich123 3y ago
Delphi 7 was 2002. Was hyper-v around back then? Or is this just a legacy app still running?
- EvanAnderson 3y ago
  Hyper-V wasn't until Windows Server 2008. I know you could do virtual serial ports w/ VMware GSX and ESX (and later ESXi) forwarded to real hardware serial ports on the host.
- alex7734 3y ago
  It's a legacy app