Visual Studio Debugger
Just-In-Time Debugging

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Just-In-Time debugging is a feature that launches the Visual Studio debugger automatically when a program, running outside Visual Studio, encounters a fatal error. Just-In-Time debugging allows you to examine the error before the application is terminated by the operating system. The Visual Studio debugger does not need to be running when the error occurs.

If an error occurs while Just-In-Time debugging is enabled, a dialog box opens, asking if you want to debug the program and which debugger you want to use.

If a program running as another user hits a fatal error, a security warning dialog box appears before the debugger starts. For more information, see Security Warning: Attaching to a process owned by an untrusted user can be dangerous. If the following information looks suspicious or you are unsure, do not attach to this process.

You can enable Just-In-Time debugging from the Options dialog box. For more information, see How to: Enable/Disable Just-In-Time Debugging.

For Windows forms, you must also enable Just-In-Time debugging in the machine.config or application.exe.config file. For more information, see How to: Enable Just-In-Time Debugging for Windows Forms.

After Visual Studio is installed on a server, the default behavior when an unhandled exception occurs is to show an Exception dialog that requires user intervention to either start Just-In-Time debugging or ignore the exception. This may be undesirable for unattended operation. To configure the server to no longer show a dialog when an unhandled exception occurs (the default behavior prior to installing Visual Studio), use the registry editor to delete the following registry keys:

  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\AeDebug\Debugger

  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\.NETFramework\DbgManagedDebugger

On a 64-bit operating system also delete the following registry keys:

  • HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\AeDebug\Debugger

  • HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\.NETFramework\DbgManagedDebugger

NoteNote:

Just-In-Time debugging will not work for managed code hosted in a native application, such as Visualizers.

NoteNote:

After installing the .NET Framework on Windows Server 2003 or on Windows 2000 SP3 (or later), Just-In-Time debugging will not work on a process running in a limited user account in a Terminal Services session until the computer has been rebooted.

See Also

Concepts

Debugger Security

Reference

Just-In-Time, Debugging, Options Dialog Box
Security Warning: Attaching to a process owned by an untrusted user can be dangerous. If the following information looks suspicious or you are unsure, do not attach to this process

Other Resources

Debugger Roadmap
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Community Content

www.st
JIT debugger
hi
i keep on getting the fallowing error: an unhandled win 32 exception occored in iexplore exe[4472]
i followed some diffarent steps and after i did what microsoft suggest (goning to run and typeing in something...) the debugger dose not appear any more but an Intermet explorer error openes(send/dont send error) and shots dowen
what can i do to corect this problme?
thanks
Tags : jit debugger

Thomas Lee
DEBUGGER

WHEN I TRY TO ACCESS MEDIA CENTRE I GET AN ERROR MESSAGE -- FATAL EXECUTION ENGINE ERROR (OX7927F26E) THEN JIT DEBUGGER NOT AVAILABLE ERROR CODE 0X2(2) CORDBG.EXE !A OX6F8 ---- HOW TO I FIX IT ?


[tfl - 03 08 09] Hi - and thanks for your post. You should post questions like this to the MSDN Forums at http://forums.microsoft.com/msdn or the MSDN Newsgroups at

http://www.microsoft.com/communities/newsgroups/en-us/ . You are much more likely get a quicker response using the forums than through the Community Content. For specific help about:
Visual Studio : http://groups.google.com/groups/dir?sel=usenet%3Dmicrosoft.public.vstudio%2C &
SQL Server : http://groups.google.com/groups/dir?sel=usenet%3Dmicrosoft.public.sqlserver%2C &
.NET Framework : http://groups.google.com/groups/dir?sel=usenet%3Dmicrosoft.public.dotnet.framework
PowerShell : http://groups.google.com/group/microsoft.public.windows.powershell/topics?pli=1
All Public : http://groups.google.com/groups/dir?sel=usenet%3Dmicrosoft.public%2C &


Thomas Lee
Just in time debugging - how to disable?

I WANT TO DISABLE JUST IN TIME DEBUGING!!!!!!!!!! I have this problem when i try to use moding tools for call of duty world at war, I AM NOT USEING VISUAL STUDIO, please can some body help me with this ***?!?!?!?!?!?!?!?!?!?!?!? I have left over 30 diferent comments on lots of forums, and no one will help. I just get stupid shity msgs from nerds who dont like to help noobs!! Im a nice guy realy, i just HATE microsoft and nerds who know it all and are ***s about the the lack of knowlege other ppl have!!

[tfl - 17 10 09] Hi - and thanks for your post. You should post questions like this to the MSDN Forums at http://forums.microsoft.com/msdn or the MSDN Newsgroups at http://www.microsoft.com/communities/newsgroups/en-us/. You are much more likely get a quicker response using the forums than through the Community Content. For specific help about:
Visual Studio  : http://groups.google.com/groups/dir?sel=usenet%3Dmicrosoft.public.vstudio%2C&
SQL Server     : http://groups.google.com/groups/dir?sel=usenet%3Dmicrosoft.public.sqlserver%2C&
.NET Framework : http://groups.google.com/groups/dir?sel=usenet%3Dmicrosoft.public.dotnet.framework
PowerShell     : http://groups.google.com/group/microsoft.public.windows.powershell/topics?pli=1
All Public     : http://groups.google.com/groups/dir?sel=usenet%3Dmicrosoft.public%2C&

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