interface_offsets = alloc_vtable (domain, vtsize + extra_interface_vtsize, imt_table_bytes);
pvt = (MonoVTable*) ((char*)interface_offsets + imt_table_bytes);
interface_offsets = alloc_vtable (domain, vtsize + extra_interface_vtsize, imt_table_bytes);
pvt = (MonoVTable*) ((char*)interface_offsets + imt_table_bytes);