graph TD;
001(main #greeter_client.cc:81 入口调用grpc::CreateChannel)-->002(grpc::CreateChannel #create_channel.h:30 调用::grpc_impl::CreateChannelImpl)

002-->003(grpc_impl::CreateChannelImpl #create_channel.cc:33 调用CreateCustomChannelImpl)

003-->004(grpc_impl::CreateCustomChannelImpl #create_channel.cc:50 初始化GrpcLibraryCodegen并最终调用grpc_init初始化核心模块, 再调用CreateChannelImpl)

004-->005(grpc_impl::InsecureChannelCredentialsImpl::CreateChannelImpl #insecure_credentials.cc:37 调用CreateChannelWithInterceptors)

005-->006(grpc_impl::InsecureChannelCredentialsImpl::CreateChannelWithInterceptors insecure_credentials.cc:50 调用grpc_insecure_channel_create)

006-->007(grpc_insecure_channel_create #channel_create.cc:104 增加了grpc.client_channel_factory参数并调用CreateChannel)

007-->008(grpc_core::CreateChannel #channel_create.cc:67 增加了grpc.server_uri参数并调用grpc_channel_create)

008-->009(grpc_channel_create #channel.cc:286 调用grpc_init, 此处不会执行初始化,因为前面已经初始化了,创建并设置grpc_channel_stack_builder参数,创建ChannelzNode,最后调用 grpc_channel_create_with_builder)

009-->010(grpc_channel_create_with_builder #channel.cc:79 调用grpc_channel_stack_builder_finish完成channel创建并设置channel的变量)

010-->011(grpc_channel_stack_builder_finish #channel_stack_builder.cc:297 创建并初始化channel对应的grpc_channel_stack)