Symbol exchange protocol

[Guest]

I want to see what's going on when WinDbg downloads symbols for user dumps from Symbol Store and Symbol Server: source, symbol name, etc. Verbose mode doesn't help me.

[VDO]

Try !sym noisy

0:000> !sym noisy
noisy mode — symbol prompts on
DBGHELP: Symbol Search Path: srv*c:\cache*http://msdl.microsoft.com/download/symbols
0:000> .reload
.......................
Loading unloaded module list
...
SYMSRV: ntdll.pdb from http://msdl.microsoft.com/download/symbols: 372194 bytes copied
DBGHELP: ntdll — public symbols
c:\cache\ntdll.pdb\DCE823FCF71A4BF5AA489994520EA18F2\ntdll.pdb
0:000> kv
SYMSRV: user32.pdb from http://msdl.microsoft.com/download/symbols: 300883 bytes copied
DBGHELP: user32 — public symbols
c:\cache\user32.pdb\5EA4E31A1AA540B9864D75E5434A777E2\user32.pdb
ChildEBP RetAddr Args to Child
0007feb8 7739c78d 7739c7c0 0007fefc 00000000 ntdll!KiFastSystemCallRet (FPO: [0,0,0])
SYMSRV: notepad.pdb from http://msdl.microsoft.com/download/symbols: 16498 bytes copied
DBGHELP: notepad — public symbols
c:\cache\notepad.pdb\B4CD0BCEC21049348161DFC07F9870B01\notepad.pdb
0007fed8 01002a3b 0007fefc 00000000 00000000 user32!NtUserGetMessage+0xc
0007ff1c 0100752b 01000000 00000000 000a24b2 notepad!WinMain+0xe5 (FPO: [Non-Fpo])
SYMSRV: kernel32.pdb from http://msdl.microsoft.com/download/symbols: 441955 bytes copied
DBGHELP: kernel32 — public symbols
c:\cache\kernel32.pdb\75CFE96517E5450DA600C870E95399FF2\kernel32.pdb
0007ffc0 77e523cd 00000000 00000000 7ffde000 notepad!WinMainCRTStartup+0x186 (FPO: [Non-Fpo])
0007fff0 00000000 010073a5 00000000 78746341 kernel32!BaseProcessStart+0x23 (FPO: [Non-Fpo])