What is the structure of a PDB file?

Question

I am trying to understand how a debugger uses PDB file. It would probably be a small file system in itself. Could someone help me understand the structure of the PDB file?

Answer 1

According to this blog post, the actual file format is kept secret by MS. However, I recommend you read that post as it has a lot of useful information what a PDB file is and how it's used.