Microsoft debug symbol don't work

问题

I try to analyze some memory dump. But I stack on debug symbols of some Microsoft dll (sechost.dll). What I do:

1) !sym noisy

2) .symfix

3) .sympath

My .sympath is:

Symbol search path is: srv*
Expanded Symbol search path is: cache*;SRV*http://msdl.microsoft.com/download/symbols

4) analyze -v After it I saw symbols loading. But for some symbols I have

......
SYMSRV:  The operation timed out
SYMSRV:  http://msdl.microsoft.com/download/symbols/sechost.pdb/C4FD72A96E384F62A5F796624D37EAB42/sechost.pdb not found
SYMSRV:  C:\ProgramData\dbg\sym\sechost.pdb\C4FD72A96E384F62A5F796624D37EAB42\sechost.pdb not found
DBGHELP: sechost.pdb - file not found
*** ERROR: Symbol file could not be found.  Defaulted to export symbols for sechost.dll - 
DBGHELP: sechost - export symbols
......

When actual analyze start I saw:

.....
IMAGE_NAME:  sechost.dll
BUCKET_ID:  WRONG_SYMBOLS
FAILURE_BUCKET_ID:  WRONG_SYMBOLS_80000003_sechost.dll!SubscribeServiceChangeNotifications
.....

I understand that I don't have PDB for this DLL. I try load it with .reload /f sechost.dll. But analyze got stuck on same place. How to deal with this? Maybe there is possibility to increase connection timeout or other way to get what I need?

回答1:

I asked this Microsoft and Andy Luhrs replied me that Microsoft needs 3 days to publish the symbols for new builds/ Windows 10 updates.

So if you analyze dumps after updates have been published, try to load symbols 3 days after the update was published.

回答2:

Symbols was temporary unavailable on the server after cumulative update Win10 1607. Microsoft already solved the issue. Better solution in such kind of situations - report the issue to the maintainer.

来源：https://stackoverflow.com/questions/42770518/microsoft-debug-symbol-dont-work