在發佈模式下調試

Question

我試圖用WinDbg和SOS爲教育目的調試.NET託管代碼應用程序。

Module Module1 

    Sub Main() 

    Console.Read() 
    throwExceptionMethod() 

    End Sub 

    Private Sub throwExceptionMethod() 

    Dim localString As String = "bad string" 
    If localString = "bad string" Then 
     Throw New System.NotSupportedException("Can't process the string.") 
    End If 

    End Sub 

End Module 

當在調試模式下編譯時，我可以看到拋出異常的方法和打破我的應用程序的本地字符串。 ！

CLRStack命令的輸出：

0:000> !CLRStack 
OS Thread Id: 0x1148 (0) 
DBGHELP: mscorwks - public symbols 
     C:\Program Files\Debugging Tools for Windows (x64)\sym\mscorwks.pdb\EC7B2AF3D7A74E1FB2A04CB8AF5F867A1\mscorwks.pdb 
DBGHELP: ntdll - public symbols 
     C:\Program Files\Debugging Tools for Windows (x64)\sym\ntdll.pdb\9D04EB0AA387494FBD81ED062072B99C2\ntdll.pdb 
DBGHELP: mscoreei - public symbols 
     C:\Program Files\Debugging Tools for Windows (x64)\sym\mscoreei.pdb\F2445BD7B5494942A39C87ED630879A92\mscoreei.pdb 
DBGHELP: MSCOREE - public symbols 
     C:\Program Files\Debugging Tools for Windows (x64)\sym\mscoree.pdb\FB53EF9DD104439E9903F0B34128E0392\mscoree.pdb 
DBGHELP: KERNEL32 - public symbols 
     C:\Program Files\Debugging Tools for Windows (x64)\sym\kernel32.pdb\C4D1D9065632419699A8B2F25B62381D2\kernel32.pdb 
Child-SP   RetAddr   Call Site 
000000000020ec70 000007ff0019014a Prototipos.Module1.throwExceptionMethod() 
000000000020ecc0 000007fef881d432 Prototipos.Module1.Main() 

而且本地字符串該方法無法處理。 ！

DSO的輸出，並做00000000027002c0：

0:000> !dso 
OS Thread Id: 0x1148 (0) 
RSP/REG   Object   Name 
000000000020ea80 00000000026ff4c8 System.Text.DecoderNLS 
000000000020eaa8 0000000002700340 System.NotSupportedException 
000000000020eac0 0000000002700340 System.NotSupportedException 
000000000020eae0 0000000002700340 System.NotSupportedException 
000000000020ebb0 0000000002700340 System.NotSupportedException 
000000000020ebc0 00000000027002f0 System.String 
000000000020ec60 00000000027002f0 System.String 
000000000020ec90 00000000027002c0 System.String 
000000000020eca8 0000000002700340 System.NotSupportedException 
000000000020ecc0 00000000026ff828 System.IO.TextReader+SyncTextReader 

0:000> !do 00000000027002c0 
Name: System.String 
MethodTable: 000007fef7ab7d90 
EEClass: 000007fef76be560 
Size: 46(0x2e) bytes 
(C:\Windows\assembly\GAC_64\mscorlib\2.0.0.0__b77a5c561934e089\mscorlib.dll) 
String: bad string 
Fields: 
       MT Field Offset     Type VT  Attr   Value Name 
000007fef7abf000 4000096  8   System.Int32 1 instance    11 m_arrayLength 
000007fef7abf000 4000097  c   System.Int32 1 instance    10 m_stringLength 
000007fef7ab97d8 4000098  10   System.Char 1 instance    62 m_firstChar 
000007fef7ab7d90 4000099  20  System.String 0 shared   static Empty 
           >> Domain:Value 00000000000bac20:00000000026f1308 << 
000007fef7ab9688 400009a  28  System.Char[] 0 shared   static WhitespaceChars 
           >> Domain:Value 00000000000bac20:00000000026f1ba0 << 

但是在釋放模式，即使PDB裝，我看不出有WinDbg的有用信息。

模塊信息的輸出。符號被加載：

0:000> !lmi Prototipos.exe 
Loaded Module Info: [prototipos.exe] 
     Module: Prototipos 
    Base Address: 0000000000940000 
    Image Name: C:\Users\joseluis.vaquero\Documents\Visual Studio 2008\Projects\Prototipos\Prototipos\bin\Release\Prototipos.exe 
    Machine Type: 332 (I386) 
    Time Stamp: 52e64b75 Mon Jan 27 13:05:09 2014 
      Size: a000 
     CheckSum: 0 
Characteristics: 102 
Debug Data Dirs: Type Size  VA Pointer 
      CODEVIEW 89, 401c, 1c1c RSDS - GUID: {ABB91DE1-4132-4D69-B9E7-2D48B4C9A548} 
       Age: 1, Pdb: C:\Users\joseluis.vaquero\Documents\Visual Studio 2008\Projects\Prototipos\Prototipos\obj\Release\Prototipos.pdb 
    Image Type: FILE  - Image read successfully from debugger. 
       C:\Users\joseluis.vaquero\Documents\Visual Studio 2008\Projects\Prototipos\Prototipos\bin\Release\Prototipos.exe 
    Symbol Type: PDB  - Symbols loaded successfully from image path. 
       C:\Users\joseluis.vaquero\Documents\Visual Studio 2008\Projects\Prototipos\Prototipos\bin\Release\Prototipos.pdb 
    Load Report: private symbols & lines, not source indexed 
       C:\Users\joseluis.vaquero\Documents\Visual Studio 2008\Projects\Prototipos\Prototipos\bin\Release\Prototipos.pdb 

我看不到Stack中的ThrowExcetionMethod。

0:000> !CLRStack 
OS Thread Id: 0xae4 (0) 
Child-SP   RetAddr   Call Site 
00000000001fe920 000007fef881d432 Prototipos.Module1.Main() 

我看不到本地字符串轉儲堆棧對象。

0:000> !dso 
OS Thread Id: 0xae4 (0) 
RSP/REG   Object   Name 
00000000001fe758 000000000268a840 System.NotImplementedException 
00000000001fe770 000000000268a840 System.NotImplementedException 
00000000001fe790 000000000268a840 System.NotImplementedException 
00000000001fe860 000000000268a840 System.NotImplementedException 
00000000001fe870 000000000268a840 System.NotImplementedException 
00000000001fe910 000000000268a840 System.NotImplementedException 
00000000001fe920 000000000268a840 System.NotImplementedException 
00000000001fe928 000000000268a8c8 System.String 

我無法通過此信息發現生產環境中發生的情況。

有沒有辦法在發佈模式下使用WinDbg獲取更多信息？

Answer 1

這是完全正常的，抖動優化器的副作用使您的代碼快速。該方法因爲內聯而消失，堆棧變量消失，因爲它們存儲在CPU寄存器中。您可以在this answer中找到由抖動執行的優化類型。

如果您強烈支持可診斷性而不是速度，那麼禁用優化器在技術上是一種選擇。選擇發佈版本配置，項目+屬性，編譯選項卡，高級按鈕，取消選中「啓用優化」選項。不是我真的推薦你這樣做順便說一句。