Mozilla Source and Symbol Server
Overview
Mozilla has a symbol server for Windows builds that allows developers or users to debug nightly and release builds without having to ship debug symbols along with the builds. This can be very useful when a user has a problem that developers can't reproduce, or when you hit a crash or hang during your normal browsing, not using a debug build.
While this is very useful, it doesn't provide source-level debugging. You can see function names and call stacks, but not the source at the location, which makes stepping through code very difficult. Luckily, Microsoft does provide a means to add source info to debug symbols, called a source server. The mission of this project is to sort through the Microsoft documentation and figure out how to add this to the existing Mozilla symbol server.
Project Name
Mozilla Source and Symbol Server
Project Description
Create a source code server to work with Mozilla's current symbol server. This will allow users to do full debugs of nightly release builds with access to remote symbols and full source code.
Project Leader(s)
Project Contributor(s)
For right now I am still working on source indexing. If anyone knows how to do this - or is interested in the continued research I am doing, please get in touch with me and I'll get you up to speed on what I know so far. Most of this info can be found on my blog
Project Details
Related Bugs
- Bug 385792: Compress PDB files
- Bug 395310: Mozilla needs a source and symbol server
- Uploading PDB files (fixed)
0.1 Release
* set up a localhost server * make buildsymbols from local build * load those symbols onto the local server * connect them up to my debugger to make sure it all works * get the microsoft scripts to work adding source code to my local pdb files * so that the debugger can access the source code from being pointed to my server
Updates
So far I have set up a server and configured it to serve up PDB files. This involved running a little script to allow the MIME type for pdb files which is application/octet-stream.
I ran make buildsymbols
on my local build of minefield and successfully generated a whole ton of symbol files. These were copied to my server and I have successfully loaded them into Visual Studio when debugging.
Right now the biggest barrier is a lack of information about the Microsoft Source Server - which comes with support for several version control systems but whose CVS version is apparently known to be potentially unstable. I have made one attempt at indexing the symbol files, it was unsuccessful.
Additional Resources
- MSDN articles on source server:
- Mozilla's symbol server: http://benjamin.smedbergs.us/blog/2007-06-11/debugging-official-builds-or-how-cool-is-the-mozilla-symbol-server/
- bonsai-test and bonsai-dev on landfill.mozilla.org support a "raw=1" parameter to get back a plain text version of a file at a specific revision.
- WinDbg comes with a perl script for doing some of this work, probably at C:\Program Files\Debugging Tools for Windows\sdk\srcsrv\cv2http.pl
- The symbolstore.py script in the Mozilla tree that builds the Breakpad symbol store already has support for grabbing CVS revision numbers