[vbox-dev] VirtualBox official debug builds/debug symbols

[Mihai Hanor]

Hi,

Does VBOX_ASSERT=no affect kernel mode assertions?

Regards,
Mihai

On Wed, Apr 11, 2018 at 11:30 AM, Michael Thayer <michael.thayer at oracle.com>
wrote:

> Hello Both,
>
> On the whole the debug build should be usable for day to day work for a
> developer (not for an innocent person of course).  Assertions can be
> made non-fatal by either running in the debugger ("gdb VBoxSVC" in one
> terminal and "gdb --args VirtualBox --startvm ..." in another) - the
> preferred option - or setting the environment variable VBOX_ASSERT=no.
> See the source file src/VBox/Runtime/VBox/RTAssertShouldPanic-vbox.cpp.
> I must admit that I was never happy with the "gdb" option, to the extent
> that I added the "wait" option for myself, but feel free to experiment.
>
> I would certainly recommend trying to investigate using a debug version.
>  That said, you can also build your own release version.  Building with
> "VBOX_WITHOUT_HARDENING=1" set will probably make you happier either way.
>
> Regards
> Michael
>
> 10.04.2018 22:35, Mihai Hanor wrote:
> > Hi Samuel,
> >
> > The VirtualBox debug build is not for regular usage. The debug build
> > runs unoptimized code and some of its code paths may differ from a
> > release build. This includes debug assertions, that will stop your VM or
> > even the host OS without warning, if they trigger. On Windows, at least,
> > an assert in the VirtualBox kernel driver will stop your OS with a BSOD
> > -- I don't know how the Linux kernel handles a kernel module fault. With
> > a debug build, it may even be harder or impossible to reproduce a
> > scenario. You can use the official build to see where it crashes, then
> > use a self-build release build to obtain a detailed stack trace, if the
> > crash is in VirtualBox code. From this point forward, it depends on the
> > issue and your skills.
> >
> > Best regards,
> > Mihai
> >
> > On Tue, Apr 10, 2018 at 6:31 PM, Samuel Rats <srats at genymobile.com
> > <mailto:srats at genymobile.com>> wrote:
> >
> >     Hi VBox people!
> >
> >     In order to investigate an issue I recently opened
> >     (https://www.virtualbox.org/ticket/17644
> >     <https://www.virtualbox.org/ticket/17644>), I was looking for some
> >     official debug builds of the VirtualBox package, but couldn't manage
> >     to find any.
> >     Even the "testing" builds are release build.
> >
> >     Can I find them somewhere, or should I build VirtualBox in debug
> >     mode myself?
> >     Additional question, do you know if the debug build is of VirtualBox
> >     is much slower than a release build, or is it still usable for
> >     days-to-days operations?
> >
> >     This issue is really bothering us, and I have time to
> >     investigate/fix it.
> >     Thanks in advance.
> >
> >     --
> >     Samuel Rats
> >     _______________________________________________
> >     vbox-dev mailing list
> >     vbox-dev at virtualbox.org <mailto:vbox-dev at virtualbox.org>
> >     https://www.virtualbox.org/mailman/listinfo/vbox-dev
> >     <https://www.virtualbox.org/mailman/listinfo/vbox-dev>
> >
> >
> >
> >
> > _______________________________________________
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> > vbox-dev at virtualbox.org
> > https://www.virtualbox.org/mailman/listinfo/vbox-dev
> >
>
> --
> Michael Thayer | VirtualBox engineer
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