Hi Michael and Tony,
The github reference for SourceLink has both the schema for the json file
(https://github.com/dotnet/designs/blob/main/accepted/2020/diagnostics/source-link.md#source-link-json-schema)
and several examples of the info contained there
(https://github.com/dotnet/designs/blob/main/accepted/2020/diagnostics/source-link.md#examples).
Please let me know what needs to be clarified and I'll be happy to provide
additional information.
Thanks,
Eugene
-Original Message-
From: Dwarf-Discuss On Behalf Of
Michael Eager via Dwarf-Discuss
Sent: Wednesday, May 04, 2022 7:14 PM
To: Eugene Rozenfeld ;
dwarf-discuss@lists.dwarfstd.org
Subject: [EXTERNAL] Re: [Dwarf-Discuss] Support for SourceLink in DWARF
Hi Eugene --
Please work with Tony Tye (cc'ed), the champion on this issue, to draft a more
complete proposal. Much of the description on the Github reference for
SourceLink is about the implementation in a PDB file and less about the what
information is contained and how it is used.
On 5/4/22 18:54, Eugene Rozenfeld via Dwarf-Discuss wrote:
> Hello,
>
> I work on the Linux tools team at Microsoft and I'd like to comment on the
> issue
> https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdwarfstd.org%2FShowIssue.php%3Fissue%3D181223.1&data=05%7C01%7CEugene.Rozenfeld%40microsoft.com%7Ce2f2311ad7b6419653ad08da2e3cfb99%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637873136819887860%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=vhy1WMTrcJzYM%2F4HRnaq5D1xzPMxfpyqIK%2FZ182%2F%2Fqk%3D&reserved=0
> that proposes to add info similar to SourceLink to the DWARF format.
> We are interested in pushing this forward both as a developer experience
> improvement and as a step in improving secure supply chain guarantees. It's
> important to be able to figure out where the sources come from if we want to
> check the binary integrity.
>
> The issue discusses two approaches: one involves augmenting the DWARF format
> and the other one relies on buildid's and debuginfod servers. We believe the
> approach whereby an arbitrary URL for source retrieval (e.g., github, VSTS,
> etc.) can be specified offers greater applicability and flexibility over
> relying on buildid and debuginfod servers. For instance, it can accommodate
> scenarios where storing debuginfo along with sources on a debuginfod server
> may not always be feasible.
>
> The issue discusses two approaches to modifying the DWARF format: one is
> augmenting the existing file table to allow the specification of a URL (the
> proposed resolution) and the other one is a per CU URL table that would allow
> the equivalent of SourceLink wildcards. The tradeoff is simplicity vs.
> potential DWARF file size saving if many source files are involved in the
> compilation. We are ok with either resolution. The important thing is a
> standard way to encode the source file information so that the producers and
> consumers agree.
>
> Thank you,
>
> Eugene
>
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--
Michael Eager
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