gin not support http pattern path in span name

[quanbisen]

Is your feature request related to a problem? Please describe.
I have see current code. I know span name will display method pattern in http standard library with go greater or equal 1.22.0, reference code:

opentelemetry-go-instrumentation/internal/pkg/instrumentation/bpf/net/http/server/probe.go

Lines 206 to 210 in 57ae946

	spanName := method
	if isPatternPathSupported && isValidPatternPath {
	spanName = spanName + " " + patternPath
	attributes = append(attributes, semconv.HTTPRouteKey.String(patternPath))
	}

But I have found that gin 1.9.1 trace span name only show method because of gin.Context internal http.Request struct field pat is nil, is there can get gin.Context.fullPath field in it?

Describe the solution you'd like
support gin.Context.fullPath field in span name. I am not good at ebpf and I have try to read gin.Context.fullPath from ebpf, but failed.

[minimAluminiumalism]

The same problem I've met. I think the code that causes this problem is in internal/pkg/instrumentation/bpf/net/http/server/bpf/probe.bpf.c:

int ret = bpf_probe_read(&pat_ptr, sizeof(pat_ptr), (void *)(req_ptr + req_pat_pos));

pat_ptr is 0.

Additionally, it seems that the same issue will ocuur in net/http package rather than just Gin. You can try the httpPlusdb on a Linux/amd64 virtual machine(not in a container).

[quanbisen]

httpPlusdb

It is only gin. I have test net/http package that have pattern in span name.

[minimAluminiumalism]

httpPlusdb

It is only gin. I have test net/http package that have pattern in span name.

Which OS and arch do you use to run this demo? You can check this issue to see the complete reproduction process.