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.net - 在 Release模式下调试

转载 作者:行者123 更新时间:2023-12-01 11:40:28 25 4
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我正尝试使用 WinDbg 调试用于教育目的的 .NET 托管代码应用程序和 SOS .

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

在 Debug模式下编译时,我可以看到抛出异常的方法和破坏我的应用程序的本地字符串。

!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()

以及该方法无法处理的本地字符串。

!dso 和 !do 00000000027002c0 的输出:

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 Release模式下,即使加载了 pdb,我也看不到 WinDbg 的有用信息。

模块信息的输出。加载符号:

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 Stack 中看不到 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

我无法使用此信息发现生产环境中发生的情况。

有没有办法在 Release模式下使用 WinDbg 获取更多信息?

最佳答案

这是完全正常的,抖动优化器使您的代码快速的副作用。该方法消失是因为它被内联,堆栈变量消失是因为它们存储在 CPU 寄存器中。您会在 this answer 中找到由抖动执行的优化类型。 .

如果您非常喜欢可诊断性而不是速度,那么禁用优化器在技术上是一种选择。选择 Release 构建配置、Project + Properties、Compiled 选项卡、Advanced 按钮,取消选中“Enable optimizations”选项。顺便说一句,并不是我真的建议你这样做。

关于.net - 在 Release模式下调试,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/21381308/

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