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windbg can't load symbol

ysys Posts: 100
Hi dear all,
I can't load symbol file from microsoft symbol server , following is
windbg output

0:000> .reload
Reloading current modules
...........
SYMSRV: 与服务器的连接被重置
SYMSRV: 与服务器的连接被重置
SYMSRV: d:\symbols\ntdll.pdb\1751003260CA42598C0FB326585000ED2\ntdll.pdb
not found
SYMSRV: https://msdl.microsoft.com/download/symbols/ntdll.pdb/1751003260CA42598C0FB326585000ED2/ntdll.pdb
not found
DBGHELP: ntdll.pdb - file not found
*** ERROR: Symbol file could not be found. Defaulted to export
symbols for C:\WINDOWS\system32\ntdll.dll -
DBGHELP: ntdll - export symbols

BTW , I've tried paste
https://msdl.microsoft.com/download/symbols/ntdll.pdb/1751003260CA42598C0FB326585000ED2/ntdll.pdb
in browser and it works .

please help , many thanks!!!

Comments

  • Hi Shang yu

    Try

    !sym noisy

    Before the

    .reload

    Perhaps this will tell you more !

    Jolyon

    > On 3 Aug 2018, at 15:59, Shang Yu xxxxx@lists.osr.com <xxxxx@gmail.com> wrote:
    >
    > Hi dear all,
    > I can't load symbol file from microsoft symbol server , following is
    > windbg output
    >
    > 0:000> .reload
    > Reloading current modules
    > ...........
    > SYMSRV: 与服务器的连接被重置
    > SYMSRV: 与服务器的连接被重置
    > SYMSRV: d:\symbols\ntdll.pdb\1751003260CA42598C0FB326585000ED2\ntdll.pdb
    > not found
    > SYMSRV: https://msdl.microsoft.com/download/symbols/ntdll.pdb/1751003260CA42598C0FB326585000ED2/ntdll.pdb
    > not found
    > DBGHELP: ntdll.pdb - file not found
    > *** ERROR: Symbol file could not be found. Defaulted to export
    > symbols for C:\WINDOWS\system32\ntdll.dll -
    > DBGHELP: ntdll - export symbols
    >
    > BTW , I've tried paste
    > https://msdl.microsoft.com/download/symbols/ntdll.pdb/1751003260CA42598C0FB326585000ED2/ntdll.pdb
    > in browser and it works .
    >
    > please help , many thanks!!!
    >
    > ---
    > WINDBG is sponsored by OSR
    >
    > OSR is hiring!! Info at http://www.osr.com/careers
    >
    >
    > MONTHLY seminars on crash dump analysis, WDF, Windows internals and software drivers!
    > Details at <http://www.osr.com/seminars>;
    >
    > To unsubscribe, visit the List Server section of OSR Online at <http://www.osronline.com/page.cfm?name=ListServer>;
  • ysys Posts: 100
    sorry , but I've turned noisy on.

    2018-08-04 2:42 GMT+08:00, Jolyon Wright <xxxxx@gmail.com>
    <xxxxx@lists.osr.com>:
    > Hi Shang yu
    >
    > Try
    >
    > !sym noisy
    >
    > Before the
    >
    > .reload
    >
    > Perhaps this will tell you more !
    >
    > Jolyon
    >
    >> On 3 Aug 2018, at 15:59, Shang Yu xxxxx@lists.osr.com <xxxxx@gmail.com>
    >> wrote:
    >>
    >> Hi dear all,
    >> I can't load symbol file from microsoft symbol server , following is
    >> windbg output
    >>
    >> 0:000> .reload
    >> Reloading current modules
    >> ...........
    >> SYMSRV: 与服务器的连接被重置
    >> SYMSRV: 与服务器的连接被重置
    >> SYMSRV: d:\symbols\ntdll.pdb\1751003260CA42598C0FB326585000ED2\ntdll.pdb
    >> not found
    >> SYMSRV:
    >> https://msdl.microsoft.com/download/symbols/ntdll.pdb/1751003260CA42598C0FB326585000ED2/ntdll.pdb
    >> not found
    >> DBGHELP: ntdll.pdb - file not found
    >> *** ERROR: Symbol file could not be found. Defaulted to export
    >> symbols for C:\WINDOWS\system32\ntdll.dll -
    >> DBGHELP: ntdll - export symbols
    >>
    >> BTW , I've tried paste
    >> https://msdl.microsoft.com/download/symbols/ntdll.pdb/1751003260CA42598C0FB326585000ED2/ntdll.pdb
    >> in browser and it works .
    >>
    >> please help , many thanks!!!
    >>
    >> ---
    >> WINDBG is sponsored by OSR
    >>
    >> OSR is hiring!! Info at http://www.osr.com/careers
    >>
    >>
    >> MONTHLY seminars on crash dump analysis, WDF, Windows internals and
    >> software drivers!
    >> Details at <http://www.osr.com/seminars>;
    >>
    >> To unsubscribe, visit the List Server section of OSR Online at
    >> <http://www.osronline.com/page.cfm?name=ListServer>;
    >
    > ---
    > WINDBG is sponsored by OSR
    >
    > OSR is hiring!! Info at http://www.osr.com/careers
    >
    >
    > MONTHLY seminars on crash dump analysis, WDF, Windows internals and software
    > drivers!
    > Details at <http://www.osr.com/seminars>;
    >
    > To unsubscribe, visit the List Server section of OSR Online at
    > <http://www.osronline.com/page.cfm?name=ListServer>;
    >
  • ysys Posts: 100
    thanks for replying . It works fine for now (I don't known the
    reaosn). many thanks !!!

    2018-08-07 3:40 GMT+08:00, Alan Adams <xxxxx@alanadams.org>
    <xxxxx@lists.osr.com>:
    >> I can't load symbol file from microsoft symbol server , following is
    >> windbg output
    >
    > Is WinDBG running in a context where it CAN access the network?
    >
    > To ask it another way, are you able to download ANY symbols
    > successfully? Or does any/every symbol download fail, not just this
    > specific NTDLL.PDB download?
    >
    > For example, when you run WinDBG locally attached to LogonUI.exe
    > instances to debug credential provider behavior, you don't actually
    > have any network access in WinDBG at that time because of the logon
    > session and security context it is running under.
    >
    > (In such instances, you have to pull down all the symbols you need
    > while running WinDBG from a normal desktop context which does have
    > network access, so that the symbols are already in the local SYMSRV
    > cache directory when you then later attempt to locally debug
    > LogonUI.exe.)
    >
    > If the context from which WinDBG.exe is being executed isn't unique in
    > any way like that, but ALL of my symbol downloads are being failed, I
    > would probably try and use Process Monitor and/or a Wireshark LAN
    > trace to try and figure out what's blocking them or preventing them
    > from succeeding.
    >
    > Alan Adams
    > Client for Open Enterprise Server
    > Micro Focus
    > xxxxx@microfocus.com
    >
    > ---
    > WINDBG is sponsored by OSR
    >
    > OSR is hiring!! Info at http://www.osr.com/careers
    >
    >
    > MONTHLY seminars on crash dump analysis, WDF, Windows internals and software
    > drivers!
    > Details at <http://www.osr.com/seminars>;
    >
    > To unsubscribe, visit the List Server section of OSR Online at
    > <http://www.osronline.com/page.cfm?name=ListServer>;
    >
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