Comment 10 for bug 1845506

XML is taken via virDomainDefFormat from the contexts `virDomainDefPtr def`
That is passed to virt-aa-helper as stdin.

These calls are from the same stack.
In my example having the same object for the VM.

vm=0x7f92240444b0 which carries def=0x7f92380e9190 nto both calls and therby the same XML context it starts with (our issue).

qemuDomainSnapshotCreateDiskActive
  -> 2*qemuDomainSnapshotCreateSingleDiskActive

Since virt-aa-helper is external it doesn't know state, libvirt needs to pass that state from the labeling calls somehow.