How can I debugging Ray framework?

thanks for reply. I edit my question. I want to distinguish whether the rpc_address is host or remote node, so I add some information in evet_stats.cc：

  const auto &rpc_address = CoreWorkerProcess::GetCoreWorker().GetRpcAddress();    
  RAY_LOG(INFO) << rpc_address.SerializeAsString() << "\n\n";  

then add core_worker_lib in the ray_common's dependency in BUILD.bzael, but I find the

ERROR: /home/Ray/ray/BUILD.bazel:2028:11: in cc_library rule //:gcs_client_lib: cycle in dependency graph:
    //:ray_pkg
    //:cp_raylet
    //:raylet
    //:raylet_lib
.-> //:gcs_client_lib
|   //:gcs_service_rpc
|   //:pubsub_lib
|   //:pubsub_rpc
|   //:grpc_common_lib
|   //:ray_common
|   //:core_worker_lib
`-- //:gcs_client_lib

so， MY question is:

1. how can I use CoreWorkerProcess in event_stat.cc ?
2. when I change the code of event_stat.cc, I use " pip3 install -e . --verbose" to recompile project, but it is too slow. Is there a another way to fast recompile when altering the cpp code of ray ？