XML configuration not working

[huj13k4n9]

I'm trying to install kvm-vmi on my Ubuntu 20.04.3.
I followed the steps on the documentation to install all modules, including KVM kernel, QEMU, libvmi and libkvmi, with no errors.
However with qemu:commandline parameters given in the documentation, the VM failed to start.

My XML config is just the same as the one in documentation:

<domain type='kvm' xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'>
  <qemu:commandline>
      <qemu:arg value='-chardev'/>
      <qemu:arg value='socket,path=/tmp/introspector,id=chardev0,reconnect=10'/>
      <qemu:arg value='-object'/>
      <qemu:arg value='introspection,id=kvmi,chardev=chardev0'/>
  </qemu:commandline>
  <name>centos7</name>
...

Error message:

internal error: process exited while connecting to monitor: 2021-12-08T08:29:27.751021Z qemu-system-x86_64: -object introspection,id=kvmi,chardev=chardev0: invalid object type: introspection

Also when I'm trying to use libvmi API vmi_init_complete() to read config, It just failed in function driver_init_vmi()(the code I use is process-list.c in libvmi examples):

I don't know how to check the errors. Can anybody give me some help? Thanks a lot.

[adlazar]

Check if ... points to a version of QEMU built with introspection patches.