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Daniel P. Berrange 707781fe12 Only add the timer when a callback is registered 
The lifetime of the virDomainEventState object is tied to
the lifetime of the driver, which in stateless drivers is
tied to the lifetime of the virConnectPtr.

If we add & remove a timer when allocating/freeing the
virDomainEventState object, we can get a situation where
the timer still triggers once after virDomainEventState
has been freed. The timeout callback can't keep a ref
on the event state though, since that would be a circular
reference.

The trick is to only register the timer when a callback
is registered with the event state & remove the timer
when the callback is unregistered.

The demo for the bug is to run

  while true ; do date ; ../tools/virsh -q -c test:///default 'shutdown test; undefine test; dominfo test' ; done

prior to this fix, it will frequently hang and / or
crash, or corrupt memory
 		2011-12-19 11:08:25 +00:00
.gnulib@6b93d00f54 build: update to latest gnulib 2011-12-01 14:12:59 -07:00
daemon build: follow directory install conventions 2011-12-12 10:26:57 -07:00
docs docs: document <address> elements in one place 2011-12-12 12:03:32 -07:00
examples examples: Update event tests for shutdown event 2011-12-05 17:35:29 +01:00
gnulib build: update to latest gnulib 2011-12-01 14:12:59 -07:00
include migration: Add more specific error code/message on migration abort 2011-12-16 16:38:26 +01:00
m4 build: reduce warnings from older gcc 2011-12-05 10:14:55 -07:00
po Release of libvirt-0.9.8 2011-12-08 15:13:50 +08:00
python python: Expose blockPeek and memoryPeek in Python binding 2011-12-15 21:01:33 +08:00
src Only add the timer when a callback is registered 2011-12-19 11:08:25 +00:00
tests tests: plug memory leak on linuxTestNodeInfo 2011-12-13 10:03:01 +01:00
tools virsh: Add option to undefine storage with domains 2011-12-16 11:42:12 +01:00
.dir-locals.el maint: let emacs avoid tabs in rng files 2011-08-13 08:56:26 -06:00
.gitignore Define keepalive protocol 2011-11-24 11:44:08 +01:00
.gitmodules make .gnulib a submodule 2009-07-08 16:17:51 +02:00
.mailmap maint: use mailmap, not AUTHORS, for secondary addresses 2011-11-11 08:56:19 -07:00
AUTHORS Maint: Update AUTHORs 2011-12-12 21:58:52 +08:00
COPYING.LIB remove all trailing blank lines 2009-07-16 15:06:42 +02:00
ChangeLog-old generate ChangeLog from git logs into distribution tarball 2009-07-08 16:17:51 +02:00
HACKING Document STREQ_NULLABLE and STRNEQ_NULLABLE 2011-10-06 16:50:38 +02:00
Makefile.am maint: add missing copyright notices 2011-07-28 15:01:17 -06:00
Makefile.nonreentrant Ban use of all inet_* functions 2010-10-22 11:59:23 +01:00
README Correct typos in the documentation (Atsushi SAKAI) 2008-01-24 10:15:13 +00:00
README-hacking maint: relax git minimum version 2010-02-24 14:29:27 -05:00
TODO Update todo list file to point at bugzilla/website 2010-10-13 16:45:26 +01:00
autobuild.sh build: let autobuild check more code 2011-12-15 17:43:07 -07:00
autogen.sh build: allow for local gnulib diffs 2011-11-09 09:03:33 -07:00
bootstrap build: fix compilation on mingw64 2011-08-19 07:20:10 -06:00
bootstrap.conf maint: allow bootstrap in a sandbox 2011-12-08 14:37:15 -07:00
cfg.mk build: update to latest gnulib 2011-12-01 14:12:59 -07:00
configure.ac build: disable dtrace on non-Linux builds 2011-12-16 08:46:41 -07:00
libvirt.pc.in * libvirt.pc.in: applied patch from Daniel Berrange to fix --cflags 2006-03-24 13:18:12 +00:00
libvirt.spec.in spec: fix inverted logic on sanlock 2011-12-14 10:31:30 -07:00
mingw32-libvirt.spec.in spec: make it easier to autoreconf when building rpm 2011-12-08 09:49:50 -07:00

README 

         LibVirt : simple API for virtualization

  Libvirt is a C toolkit to interact with the virtualization capabilities
of recent versions of Linux (and other OSes). It is free software
available under the GNU Lesser General Public License. Virtualization of
the Linux Operating System means the ability to run multiple instances of
Operating Systems concurrently on a single hardware system where the basic
resources are driven by a Linux instance. The library aim at providing
long term stable C API initially for the Xen paravirtualization but
should be able to integrate other virtualization mechanisms if needed.

Daniel Veillard <veillard@redhat.com>