[libvirt] Memory leak in virInitialize -> vboxRegister -> VBoxCGlueInit

[Daniel P. Berrange]

On Mon, Aug 13, 2012 at 09:53:22AM -0600, Eric Blake wrote:
> On 08/13/2012 01:57 AM, Daniel P. Berrange wrote:
> > On Sat, Aug 11, 2012 at 07:45:19AM +0100, Richard W.M. Jones wrote:
> >> https://bugzilla.redhat.com/show_bug.cgi?id=847429
> >>
> >> Spotted by valgrind:
> >>
> >> ==2390== 45 bytes in 1 blocks are definitely lost in loss record 68 of 123
> 
> >> ==2390==    by 0x5817568: virInitialize (libvirt.c:450)
> >> ==2390==    by 0x5492C02: init_libguestfs (guestfs.c:108)
> >>
> >> libvirt-0.10.0-0rc0.fc18.x86_64
> >>
> >> libguestfs calls virInitialize, but (since there is no cleanup
> >> function) doesn't do any corresponding cleanup.  Is that correct?
> > 
> > Yep, virInitialize does global one-time initialization and we don't
> > provide any de-initialization function, so any memory allocations
> > should be considered global state. You'll want to provide a valgrind
> > suppressions file which whitelists any stack trace below the
> > virInitialize function.
> 
> Should libvirt be providing a suppression file as part of the
> installation to make it easier for others to ignore known one-shot
> initializations?

Is there a way for individual libraries to register global suppression
files with valgrind ?  If so, then I think it'd be reasonable for us
to supply one. Otherwise, we could at least stuff one in the docs
directory

Daniel
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