Convert DBG into PDB?

Question

i have a Win32 compiler which, for years, has been able to create a DBG debug information file.

This has allowed debuggers, and tools like Process Explorer and Process Monitor to have access to symbol information:

i recently learned that Visual Studio's debugger no longer accepts DBG files, only undocumented Program Database (PDB) files:

Since Microsoft keeps the PDB format secret, i assume they have a tool that will allow me to convert existing debugging information to a PDB (so i don't learn the secrets of their file format).

Bonus Reading

• cv2pdb: how to use to convert other debug formats to pdb?

Undocumented

Even though Microsoft has a GitHub repository for PDB, the spec remains completely undocumented. The files on their repository are incomplete. There are missing types and declarations.

And even though i've created a PDBViewer:

It doesn't get me anything - because Microsoft doesn't explain what any of it means.

The point isn't just to look at a PDB - we need to create one. And for that we need to know:

• what goes in it
• where
• and what format

Answer 1

The PDB format is now documented-through-code by Microsoft in a GitHub repository. LLVM also have a great overview, partly based on Microsoft's documentation.

That's not a complete answer because you'll still need to write the tool to do the conversion...

Answer 2

LLVM developers documented the PDB file format in order to make clang and lld able to read and produce PDB files. Microsoft's PDB Github repository was put up, in part, to support that work.

PDB is primarily a container for CodeView debug info, which is documented by Microsoft.

LLVM provides libraries for working with PDBs and COFF debug info, as well as command line tools for inspecting and generating them from YAML.

Answer 3

PDB is not documented, but you can collect very detailed information about the content of PDB files programmatically using the appropriate interfaces See Sample