[uml-devel] Valgrinding Linux kernel with UML

[uml-devel] Valgrinding Linux kernel with UML

[derry shribman]

Hi,

I have been using valgrind for quite a while, and found it to be very useful 
for my user-mode Linux programming.
I therefore tried getting valgrind to work on the Linux Kernel, with UML.

I did a few quick hacks:
- getting valgrind it to know UML's kmalloc/kfree and friends
- canceling the sanity check valgrind performs upon loading an image, in 
which it checks the image base address (since UML loads the kernel at a 
different virtual start address than regular applications start address).

Still - valgrind+UML crashed immediately.

Did anyone try out valgrind+UML?

Thanks,
Derry

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Re: [uml-devel] Valgrinding Linux kernel with UML

[Henrik Nordstrom]

There was some discussion on this some weeks ago, indicating at least that
it was possible to run UML under valgrind with some patches to valgrind
but unless it was thought about the kmalloc/kfree and friends it could not
do much useful.. check the archives if you have not already, maybe there 
is some useful clues.

Regards
Henrik

On Sun, 30 Nov 2003, derry shribman wrote:

> Hi,
> 
> I have been using valgrind for quite a while, and found it to be very useful 
> for my user-mode Linux programming.
> I therefore tried getting valgrind to work on the Linux Kernel, with UML.
> 
> I did a few quick hacks:
> - getting valgrind it to know UML's kmalloc/kfree and friends
> - canceling the sanity check valgrind performs upon loading an image, in 
> which it checks the image base address (since UML loads the kernel at a 
> different virtual start address than regular applications start address).
> 
> Still - valgrind+UML crashed immediately.
> 
> Did anyone try out valgrind+UML?
> 
> Thanks,
> Derry
> 
> _________________________________________________________________
> Protect your PC - get McAfee.com VirusScan Online 
> http://clinic.mcafee.com/clinic/ibuy/campaign.asp?cid=3963
> 
> 
> 
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> This SF.net email is sponsored by: SF.net Giveback Program.
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[uml-devel] bug: [ 851759 ] SuSE YAST in textmode does not work

[roland]

Hi,
i have submitted a bugreport related to yast:
http://sourceforge.net/tracker/index.php?func=detail&atid=100429&aid=851759&group_id=429
i don`t know if it`s a yast bug or if it`s a uml bug - but the effect is, that yast isn`t really usable inside an uml. did others
experience this bug?  comments?

regards
roland

ps:
it is important for me to fix this, because if i setup uml`s for my users, the first thing they will do is firing up yast to install
packages. so - this is an essential tool which should work correct.

pps:
sorry for flooding uml-lists with so many posts - but i had just some time this weekend :D



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Re: [uml-devel] Valgrinding Linux kernel with UML

[Jeff Dike]

derrysh@hotmail.com said:
> Still - valgrind+UML crashed immediately.
> Did anyone try out valgrind+UML? 

There is a config option (double the size of the kernel stack) that you need
to set in order for Valgrind to have a chance.

There are also a bunch of Valgrind fixes which are necessary, and I don't
know whether they've made it in yet.

				Jeff



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