我正在尝试使用WinDbg和SOS来调试一个.NET托管代码应用程序,以教育为目的。
当以调试模式编译时,我可以看到抛出异常的方法和导致应用程序崩溃的本地字符串。
!CLRStack命令的输出:
这个方法无法处理的是本地字符串。
!dso 和 !do 00000000027002c0 的输出结果:
但在发布模式下,即使已加载pdb文件,我也无法在WinDbg中看到有用的信息。
模块信息输出。符号已加载:
我在堆栈中找不到ThrowExcetionMethod。
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
当以调试模式编译时,我可以看到抛出异常的方法和导致应用程序崩溃的本地字符串。
!CLRStack命令的输出:
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()
这个方法无法处理的是本地字符串。
!dso 和 !do 00000000027002c0 的输出结果:
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 <<
但在发布模式下,即使已加载pdb文件,我也无法在WinDbg中看到有用的信息。
模块信息输出。符号已加载:
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
我在堆栈中找不到ThrowExcetionMethod。
0:000> !CLRStack
OS Thread Id: 0xae4 (0)
Child-SP RetAddr Call Site
00000000001fe920 000007fef881d432 Prototipos.Module1.Main()
我无法看到本地字符串转储堆栈对象。
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
根据这些信息,我无法发现在生产环境中发生了什么。
在发布模式下,是否有一种使用WinDbg获取更多信息的方法?
sxe clr
在任何 .NET 异常时停止,然后在异常被抛出时运行命令。这个假设正确吗? - Thomas Weller