WinDbg预览未加载压缩的.pd_符号文件

Question

WinDbg预览

我的符号路径是：

     SRV*C:\Symbols*http://msdl.microsoft.com/download/symbols

符号文件夹

     c:\Symbols\HelloWorld64.pdb\408F6A6B3154428DA5DB17FDD17ABAEE1\

这两个文件

    HelloWorld64.pd_
    refs.ptr

为了创建上面压缩的.pd_，我使用了/compress选项：

    SymStore.exe add /compress /f "C:\Development\HelloWorld\Bin\HelloWorld\x64\HelloWorld64.pdb" /s C:\Symbols /t HelloWorld64-Release /v 2.47.0.1 /o

    SYMSTORE MESSAGE: 0 alternate indexers registered
    SYMSTORE MESSAGE: LastId.txt reported id 131
    SYMSTORE MESSAGE: Final id is 0000000131
    SYMSTORE MESSAGE: Copying 
    C:\Development\HelloWorld\Bin\HelloWorld\x64\HelloWorld64.pdb to C:\Symbols\HelloWorld64.pdb\408F6A6B3154428DA5DB17FDD17ABAEE1\HelloWorld64.pd_ [Force: T, Compress: T]

    SYMSTORE: Number of files stored = 1
    SYMSTORE: Number of errors = 0
    SYMSTORE: Number of files ignored = 0

但是，在加载DMP文件时，WinDbg无法找到.pd_，而是查找.pdb：

    DBGENG:  C:\Development\HelloWorld\Bin\HelloWorld\x64\HelloWorld64.exe - Mapped image memory
    SYMSRV:  BYINDEX: 0x12
     c:\symbols*http://msdl.microsoft.com/download/symbols
     HelloWorld64.pdb
     408F6A6B3154428DA5DB17FDD17ABAEE1
     SYMSRV:  UNC: c:\symbols\HelloWorld64.pdb\408F6A6B3154428DA5DB17FDD17ABAEE1\HelloWorld64.pdb - file not found
     SYMSRV:  RESULT: 0x00000000
     DBGHELP: HelloWorld64.pdb - file not found
     DBGHELP: HelloWorld64 - no symbols loaded

有什么想法吗？谢谢!

Answer 1

只有当您有压缩的pdb时，symsrv才能与未压缩的pdb一起工作，您需要一个缓存，在此缓存可以解压缩版本10.0.19528.1000 AMD64上的演练。

如果使用symstore存储压缩的pdb，则需要一个本地缓存来解压缩它，然后symsrv才能找到它。

0:000> .reload /f
Reloading current modules
.SYMSRV:  BYINDEX: 0x2
         f:\symbols*https://msdl.microsoft.com/download/symbols
         deto.pdb
         3C481DA1FE5E450F947D744F14D014272
SYMSRV:  UNC: f:\symbols\deto.pdb\3C481DA1FE5E450F947D744F14D014272\deto.pdb - file not found
SYMSRV:  RESULT: 0x00000000
DBGHELP: F:\src\deto\deto.pdb - file not found
DBGHELP: deto - no symbols loaded

上面找不到符号，因为只有deto.pd_存在，在那里使用symstore.exe存储

F:\src\deto>dir /s /b f:\symbols\deto.pdb\3C481DA1FE5E450F947D744F14D014272\
f:\symbols\deto.pdb\3C481DA1FE5E450F947D744F14D014272\deto.pd_
f:\symbols\deto.pdb\3C481DA1FE5E450F947D744F14D014272\refs.ptr

临时更改符号路径以添加本地缓存

0:000> .sympath srv*f:\test*f:\symbols
DBGHELP: Symbol Search Path: srv*f:\test*f:\symbols

执行.reload符号现在可以在f:\test中访问(它还将在访问f：\ ntdll.pdb之前将ntdll.pdb和其他符号从f：\符号复制到f:\test

“压缩”选项主要用于符号服务器操作(在这些操作中，您有千兆字节的符号，用于千兆字节的版本)，如果您编译它们，只需存储，然后解压缩，并消除头痛。

0:000> .reload /f
Reloading current modules
.SYMSRV:  BYINDEX: 0x8
         f:\test*f:\symbols
         deto.pdb
         3C481DA1FE5E450F947D744F14D014272
SYMSRV:  UNC: f:\test\deto.pdb\3C481DA1FE5E450F947D744F14D014272\deto.pdb - path not found
SYMSRV:  UNC: f:\test\deto.pdb\3C481DA1FE5E450F947D744F14D014272\deto.pd_ - path not found
SYMSRV:  UNC: f:\test\deto.pdb\3C481DA1FE5E450F947D744F14D014272\file.ptr - path not found
SYMSRV:  UNC: f:\symbols\deto.pdb\3C481DA1FE5E450F947D744F14D014272\deto.pdb - file not found
SYMSRV:  deto.pd_ from f:\symbols: uncompressed
SYMSRV:  PATH: f:\test\deto.pdb\3C481DA1FE5E450F947D744F14D014272\deto.pdb
SYMSRV:  RESULT: 0x00000000
DBGHELP: deto - private symbols & lines 
        f:\test\deto.pdb\3C481DA1FE5E450F947D744F14D014272\deto.pdb