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libvirt
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Daniel P. Berrange 8e44e5593e Prevent crash from dlclose() of libvirt.so 
When libvirt calls virInitialize it creates a thread local
for the virErrorPtr storage, and registers a callback to
cleanup memory when a thread exits. When libvirt is dlclose()d
or otherwise made non-resident, the callback function is
removed from memory, but the thread local may still exist
and if a thread later exists, it will invoke the callback
and SEGV. There may also be other thread locals with callbacks
pointing to libvirt code, so it is in general never safe to
unload libvirt.so from memory once initialized.

To allow dlclose() to succeed, but keep libvirt.so resident
in memory, link with '-z nodelete'. This issue was first
found with the libvirt CIM provider, but can potentially
hit many of the dynamic language bindings which all ultimately
involve dlopen() in some way, either on libvirt.so itself,
or on the glue code for the binding which in turns links
to libvirt

* configure.ac, src/Makefile.am: Ensure libvirt.so is linked
  with -z nodelete
* cfg.mk, .gitignore, tests/Makefile.am, tests/shunloadhelper.c,
  tests/shunloadtest.c: A test case to unload libvirt while
  a thread is still running.
 		2011-09-16 15:51:31 -06:00
.gnulib@da1717b7f9 maint: update to latest gnulib 2011-09-08 14:36:46 +01:00
daemon Do not log invalid operations in libvirtd logs 2011-09-13 18:24:13 +08:00
docs Remove two references to files not generated 2011-09-14 22:57:46 +08:00
examples snapshot: better events when starting paused 2011-09-02 10:00:06 -06:00
gnulib freebsd: Fix build problem due to picking up the wrong libvirt.h 2011-07-29 07:35:54 -06:00
include qemu: Introduce shutdown reason for paused state 2011-09-16 17:25:55 +02:00
m4 tests: Lower stack usage below 4096 bytes 2011-04-30 19:59:52 +02:00
po hyperv: Add basic driver for Microsoft Hyper-V 2011-08-26 17:52:55 +02:00
python python: Fix bindings generated in VPATH build 2011-09-16 17:07:57 +02:00
src Prevent crash from dlclose() of libvirt.so 2011-09-16 15:51:31 -06:00
tests Prevent crash from dlclose() of libvirt.so 2011-09-16 15:51:31 -06:00
tools qemu: Introduce shutdown reason for paused state 2011-09-16 17:25:55 +02:00
.dir-locals.el maint: let emacs avoid tabs in rng files 2011-08-13 08:56:26 -06:00
.gitignore Prevent crash from dlclose() of libvirt.so 2011-09-16 15:51:31 -06:00
.gitmodules make .gnulib a submodule 2009-07-08 16:17:51 +02:00
.mailmap Change my email domain 2011-09-01 16:13:34 -06:00
AUTHORS virnetsocket: Pass KRB5CCNAME env variable 2011-09-09 15:59:26 +02:00
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 build: rename files.h to virfile.h 2011-07-21 10:34:51 -06:00
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 Remove the Open Nebula driver 2011-03-28 14:09:11 +01:00
autogen.sh build: avoid problems with autogen.sh runs from tarball 2011-02-12 06:28:28 -07:00
bootstrap build: fix compilation on mingw64 2011-08-19 07:20:10 -06:00
bootstrap.conf Add API for duplicating a socket/client file descriptor 2011-08-15 15:21:26 +02:00
cfg.mk Prevent crash from dlclose() of libvirt.so 2011-09-16 15:51:31 -06:00
configure.ac Prevent crash from dlclose() of libvirt.so 2011-09-16 15:51:31 -06:00
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: Require augeas for sanlock 2011-09-15 17:08:59 +02:00
mingw32-libvirt.spec.in snapshot: update rng to support full domain in xml 2011-09-03 08:12:13 -06:00

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>