golang/go

x/debug: viewcore can't type some stack variables

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#73,035 opened on Mar 25, 2025

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FeatureRequestNeedsInvestigationcompiler/runtimehelp wanted

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Description

Some stack variables in viewcore and gocore are ignored because gocore doesn't handle them properly. I don't fully understand this yet, but @thanm made us aware of this issue and helpfully left a comment in the code:

"Instead what the code above should be doing is caching any abstract variables it encounters in a map (indexed by DWARF offset), then when it encounters a concrete var, pick the name and type up from the abstract variable."

Than also linked to a design doc for this with examples: https://github.com/golang/proposal/blob/master/design/22080-dwarf-inlining.md#how-the-generated-dwarf-should-look.

Contributor guide

Research direction
Inspect the handling of abstract variables in gocore's viewcore and implement caching by DWARF offset to properly associate concrete variables with abstract ones, following the design doc at https://github.com/golang/proposal/blob/master/design/22080 dwarf inlining.md.
Tech stack
go
Domain
backend
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Mostly clear
Prerequisites
GoDWARFGit
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
30