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  • run cdb as service, but fail acquiring symbols over http

    From me.loading.15@gmail.com@21:1/5 to All on Tue Aug 21 04:59:46 2018
    I am trying to analyze crash using cdb.exe from windbg.
    I run an windows service to invoke cdb to analyze dmp that i passed in. Then send me the result.

    Symbol search path is something like this: d:\oldstyle;cache*d:\winsyms;srv*http://127.0.0.1:9094/home/apache/winsym

    What i actually want is, download symbols from http://127.0.0.1:9094/home/apache/winsym, and save to d:\winsyms(local cache)

    ************* Problem is something like this:***************

    Unable to load image C:\Windows\System32\combase.dll, Win32 error 0n2
    DBGENG: combase.dll - Partial symbol image load missing image info
    DBGHELP: Module is not fully loaded into memory.
    DBGHELP: Searching for symbols using debugger-provided data.
    DBGHELP: d:\oldstyle\combase.pdb - file not found
    DBGHELP: d:\oldstyle\dll\combase.pdb - file not found
    DBGHELP: d:\oldstyle\symbols\dll\combase.pdb - file not found
    SYMSRV: BYINDEX: 0x1F
    d:\winsyms
    combase.pdb
    6D54516506E95F4ABC3FBDAF3373F96D1
    SYMSRV: UNC: d:\winsyms\combase.pdb\6D54516506E95F4ABC3FBDAF3373F96D1\combase.pdb - path not found
    SYMSRV: UNC: d:\winsyms\combase.pdb\6D54516506E95F4ABC3FBDAF3373F96D1\combase.pd_ - path not found
    SYMSRV: UNC: d:\winsyms\combase.pdb\6D54516506E95F4ABC3FBDAF3373F96D1\file.ptr - path not found
    SYMSRV: RESULT: 0x80070003
    SYMSRV: BYINDEX: 0x20
    http://127.0.0.1:9094/home/apache/winsym
    combase.pdb
    6D54516506E95F4ABC3FBDAF3373F96D1
    SYMSRV: UNC: D:\Windows Kits\Debuggers\x64\sym\combase.pdb\6D54516506E95F4ABC3FBDAF3373F96D1\combase.pdb - path not found
    SYMSRV: UNC: D:\Windows Kits\Debuggers\x64\sym\combase.pdb\6D54516506E95F4ABC3FBDAF3373F96D1\combase.pd_ - path not found
    SYMSRV: UNC: D:\Windows Kits\Debuggers\x64\sym\combase.pdb\6D54516506E95F4ABC3FBDAF3373F96D1\file.ptr - path not found
    SYMSRV: HTTPGET: /home/apache/winsym/combase.pdb/6D54516506E95F4ABC3FBDAF3373F96D1/combase.pdb
    SYMSRV: WinHttpSendRequest: 800C0057
    SYMSRV: RESULT: 0x800C0057
    DBGHELP: combase.pdb - file not found

    ************************************************************

    SYMSRV: HTTPGET: /home/apache/winsym/combase.pdb/6D54516506E95F4ABC3FBDAF3373F96D1/combase.pdb
    SYMSRV: WinHttpSendRequest: 800C0057
    SYMSRV: RESULT: 0x800C0057

    I got "WinHttpSendRequest: 800C0057" after cdb tried to download symbol from my http server.
    It's totally ok if i call cdb from a Command Prompt.

    I digged and found out:
    When running from a Command Prompt, cdb uses WinINet to access internet resources. When running from a Windows service, cdb uses WinHTTP to access internet resources.

    But i found nothing about "WinHttpSendRequest: 800C0057"

    I am looking for help with this hell.


    Thanks and Regards
    wyx

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