Doubt about trace ID

[keyval-dev]

Doubt about trace ID

[edeNFed]

Hi, if you are referring to context propagation (sending trace id over request headers), we just released that.
Please check out v0.6.0

[yfractal]

I guess relates code is here

opentelemetry-go-instrumentation/pkg/instrumentors/bpf/google/golang/org/grpc/bpf/probe.bpf.c

Lines 150 to 157 in 483a265

	char val[SPAN_CONTEXT_STRING_SIZE];
	span_context_to_w3c_string(&grpcReq.sc, val);
	struct go_string val_str = write_user_go_string(val, sizeof(val));
	struct hpack_header_field hf = {};
	hf.name = key_str;
	hf.value = val_str;
	append_item_to_slice(&slice, &hf, sizeof(hf), &slice_user_ptr, &headers_buff_map);
	bpf_map_update_elem(&context_to_grpc_events, &parent_ctx, &grpcReq, 0);

append_item_to_slice will do writing

[EvanLjp]

Thx a lot, there was no code for that at the time I asked. I would read the related PRs.

I guess relates code is here

opentelemetry-go-instrumentation/pkg/instrumentors/bpf/google/golang/org/grpc/bpf/probe.bpf.c

Lines 150 to 157 in 483a265

	char val[SPAN_CONTEXT_STRING_SIZE];
	span_context_to_w3c_string(&grpcReq.sc, val);
	struct go_string val_str = write_user_go_string(val, sizeof(val));
	struct hpack_header_field hf = {};
	hf.name = key_str;
	hf.value = val_str;
	append_item_to_slice(&slice, &hf, sizeof(hf), &slice_user_ptr, &headers_buff_map);
	bpf_map_update_elem(&context_to_grpc_events, &parent_ctx, &grpcReq, 0);

append_item_to_slice will do writing