When calling a Logger method inside a helper function, the recorded source code is the source code of the helper:

 func Foo() { logSomething("hello world", "key": 1, "value": "xyz") } func logSomething(msg string, kvs ...any) { slog.Default().Info("logging " + msg", kvs...) } 

Other logging libraries (zap, go-logr) have a WithCallDepth call for this. testing.T has Helper, but that is less flexible.

It would be useful to add Logger.WithCallDepth, then this example would become:

func logSomething(msg string, kvs ...any) { slog.Default().WithCallDepth(1).Info("logging " + msg", kvs...) } 

The only solution right now is for logSomething to translate its arguments into a Record, do stack unwinding, then call Handler.Handle. This is doable, but implies copying quite a bit of code from slog because the helper functions which do that in Logger are not exported (and probably shouldn't be).

cc @jba