How to read Source Link JSON data from PDBs

[gregwb]

Is there a supported way for retrieving Source Link URLs from PDB files?

For writing tools that use Source Link data, there's a useful SourceLinkMap for parsing the JSON, but how can the JSON be read from a PDB in the first place?

I note that the symreader-converter project has code for reading Source Link data, but from my experimentation, I believe the APIs used there do not support PDBs for native C++ projects. I would like in particular to be able to read Source Link data embedded in native PDBs by the C++ linker.

From this comment it appears at a pinch I may be able to use pdbstr.exe to extract streams sourcelink$1, sourcelink$2, ... etc. But I was hoping for a more convenient API than a command-line tool.

[tmat]

The debugger reads the data using IDiaDataSource3 from DIA APIs which are unfortunately not public currently.

We'll use https://developercommunity.visualstudio.com/t/Is-there-an-API-for-reading-Source-Link-/1468642 to track the feature request to make these APIs public.