WinDbg symbol resolution

by

Sorry for the late reply.
In your post you mention that you are seeing the following error message.

*** WARNING: Unable to verify checksum for C:\TheProgram\SomeSubfolder\AnotherSubfolder\MyDll.dll

You also ask the question, “where do I put my symbols for my DLL in the symbol path?”

Here is a response for the first problem:

Steps to identify mismatched symbols.

  1. !sym noisy
  2. .reload
  3. x MyDll!*class*
    *This reloads your dll, alternatively you can type kb to display the call stack of the DLL which should load it as well.
  4. !sym quiet
    *Reset’s back to original quiet symbol loading

Also you can run

0:001> lmv m myDll  *(and examine the Checksum)

Note: If you have a checksum, then Windbg can match the checksum of the DLL against the checksum of the PDB. Every development environment has a different way to generate a checksum.

Here is the response for the questions about where to put the PDBs

If you have MyDll.pdb added to a symbol store then you can use the following syntax

.sympath SRV*c:\symcache*http://msdl.microsoft.com/download/symbols

As Roger has suggested above…

However if you just have the PDB locally, you may want to put the path to the PDB first before going out to the symbol server like this

.sympath C:\TheProgram\SomeSubfolder\AnotherSubfolder\;SRV*c:\symcache*http://msdl.microsoft.com/download/symbols

This way Windbg should look local to your SomSubFolder dir before trying to use the Symbols Server cache.

Thanks,
Aaron

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