[libvirt] Assert with libvirt + xen hvm

[Michal Privoznik]

On 22.01.2015 17:49, CloudPatch Staff wrote:
> We're hitting an assert whenever we try to create an HVM instance under
> Xen via libvirtd.
> 
> System is running on Gentoo, package information as follows:
> 
> app-emulation/xen-4.5.0 USE="api debug flask hvm pam pygrub python qemu
> screen"
> app-emulation/xen-tools-4.5.0 USE="api debug flask hvm pam pygrub python
> qemu screen"
> app-emulation/libvirt-1.2.11-r2:0/1.2.11 USE="caps libvirtd lvm macvtap
> nls qemu udev vepa virtualbox xen"
> 
> The following commands are run in parallel:
> 
> vmmachine ~ # libvirtd --listen
> 2015-01-22 16:33:13.596+0000: 2620: info : libvirt version: 1.2.11
> 2015-01-22 16:33:13.596+0000: 2620: error : udevGetDMIData:1607 : Failed
> to get udev device for syspath '/sys/devices/virtual/dmi/id' or
> '/sys/class/dmi/id'
> libvirtd: libxl_fork.c:350: sigchld_installhandler_core: Assertion
> `((void)"application must negotiate with libxl about SIGCHLD",
> !(sigchld_saved_action.sa_flags & 4) &&
> (sigchld_saved_action.__sigaction_handler.sa_handler ==
> ((__sighandler_t) 0) ||
> sigchld_saved_action.__sigaction_handler.sa_handler == ((__sighandler_t)
> 1)))' failed.
> Aborted

Interesting. Can you attach a debugger so we can see stacktrace?

Michal