simgrid::kernel::resource::VirtualMachineImpl::extension_create<DirtyPageTrackingExt>();
simgrid::s4u::VirtualMachine::on_creation_cb(&on_virtual_machine_creation);
simgrid::s4u::Exec::on_start_cb(&on_exec_creation);
simgrid::kernel::resource::VirtualMachineImpl::extension_create<DirtyPageTrackingExt>();
simgrid::s4u::VirtualMachine::on_creation_cb(&on_virtual_machine_creation);
simgrid::s4u::Exec::on_start_cb(&on_exec_creation);