Highlighted
Contributor
Contributor

How to use VProbe inside ESXI hypervisor?

I'm reading the VProbe documentation, but consider only virtual machines instrumentation. Can i instrument the ESXI hypervisor, in order to intercept calls from/to VMkernel?

0 Kudos
4 Replies
Highlighted
Contributor
Contributor

What are you looking to do? If you share some details or an example, perhaps someone can help.

CTO | Co-founder CloudPhysics, Inc. http://www.cloudphysics.com http://virtualirfan.com
0 Kudos
Highlighted
Contributor
Contributor

Hi virtualirfan, for example, in the context of esxi hypervisor, i need to intercept all driver API (vmklinux or native) calls related to a read/write syscall. Is it possible?

0 Kudos
Highlighted
Contributor
Contributor

You have to know the entry function name if it's a standard vmkernel function. Might also work for a VMware driver. Are you the driver author? If so, look at the VMware driver guide on how to inject your driver symbols in.

To trace a function, do this:

$ vprobe -t World_Switch

Enter: World_Switch

Enter: World_Switch

Enter: World_Switch

Exit:  World_Switch retval = 0x41221d265000

Exit:  World_Switch retval = 0x412241ce5000

Exit:  World_Switch retval = 0x412214925000

Let me know if you need more.

CTO | Co-founder CloudPhysics, Inc. http://www.cloudphysics.com http://virtualirfan.com
0 Kudos
Highlighted
Contributor
Contributor

Thanks a lot! I'm not a driver author. Where can i find that VMware driver guide? Is it possible, for example, to probe function calls related to a specific context, e.g. storage subsystem? Finally, vprobe allows to read (or maybe write) target variables at function entry point?

0 Kudos