logging from VMMGC module

[vthakkar]

What is the way to get logs from VMMRC.rc module that maps in the guest context? Do I need to build virtualbox with VBOX_WITH_R0_LOGGING enabled?
Specifically, I am looking to get logs from VMMRC/PATMRC.cpp.

Currently, I am creating a debug build of virtualbox and I have enabled VBOX_WITH_R0_LOGGING in my LocalConfig.kmk.
I am setting the following environment variable
set VBOX_LOG=patm*.e.l.f

But, I only get the PATM logs from VMMR3/PATM* files and not from VMMRC/PATMRC.cpp

[socratis]

Moving to "OSE" from "Windows Hosts".

[frank]

Setting VBOX_WITH_R0_LOGGING is not necessary to get logging from stuff running in raw mode: Stuff in VMM/VMMRC (which is placed into VMMRC.rc) runs only in the raw context (guest context R0) -- when VT-x is not used. VBOX_WITH_R0_LOGGING is for enabling logging of the host R0 context (VT-x used, the VMM runs in host R0 context).

To enable logging for VMMR3/PATMRC you need to compile VBox as debug build. You need to set BUILD_TYPE=debug. If you compile VBox with

Code: Select all

./configure

then you need to run

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./configure --build-debug

which will change that environment variable in env.sh.

When you run VBox, make sure to set

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VBOX_LOG=patm.e.l.f

. I think the asterik in your line is superfluous. To be on the safe side, export VBOX_LOG.