Specify how to obtain a Ruby thread's id

[fallwith]

Update the span-general.md#source-code-attributes table for obtaining
thread ids and names across languages to explain how to obtain a
thread's id for Ruby.

[linux-foundation-easycla]

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• ✅ login: fallwith / name: James Bunch (b3af1e8)

[Oberon00]

Is there always only one unique Ruby object per logical Thread? Otherwise I think this may have confusing results.

[fallwith]

Is there always only one unique Ruby object per logical Thread? Otherwise I think this may have confusing results.

Hi @Oberon00. The table row in question already had a value for the current thread's name. There is a name attribute available on the instance of the Thread class that is referenced by the table.

That instance of the Thread class is itself a unique object from Ruby's perspective and has a unique object id which is exposed via object_id.

[arminru]

@open-telemetry/ruby-maintainers @open-telemetry/ruby-approvers PTAL

[ahayworth]

👋 Hello from @open-telemetry/ruby-approvers 👋

Since the semantic conventions explicitly require that thread.id be the Current "managed" thread ID (as opposed to OS thread ID). - this would be the right way to go about it. 👍