Question

Enabling JIT Debugging (.NET 2.0)

Asked by: drydo

OK - I'm been getting the following error whilst testing my .Net 2.0 application on a deployment machine...

<quote>
An unhandled win32 exception occured in <application exe> [1808]. Just-In-Time debugging this exception failed with the following error: No installed debugger has Just-In-Time debugging enabled. In Visual Studio, Just-In-Time debugging can be enabled from Tools/Options/Debugging/Just-In-Time.

Check the documentation index for 'Just-in-time debugging, error' for more information.
</quote>

Now my first thought was to install the .Net 2.0 framework SDK to utilise the GuiDebug utility.  However, that didn't help, nor did adding...

<system.windows.forms jitDebugging="true"/>

...nor a host of other registry tweaks and other options.  Safe to say that the application has been built in 'Debug' release.  Now I'm really struggling to sort this issue out and the above error message is useless and in tracking and resolving this.

FYI - the application has been built in VS2005 (with SP1), .NET 2.0.  The deployment machine is running Window XP Home, SP2 with all the critical MS updates installed.

Any thoughts on getting the JIT debugger or something that would give me better indication of what and where this error is?

Chrs

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Asked On
2007-01-29 at 09:11:06ID22140821
Tags

jit

,

debugging

Topic

.NET

Participating Experts
2
Points
500
Comments
12

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Answers

 

by: gregoryyoungPosted on 2007-01-29 at 09:52:32ID: 18421282

Are you just trying to get the exception that occurred or are you trying to actually hook up a debugger?

Cheers,

Greg

 

by: drydoPosted on 2007-01-29 at 12:18:22ID: 18422538

Either would help if the truth be known, although my preference would be to hook to a debugger.  Note: I've already added a application.threadexception event handler and that doesn't pick up anything :-(  The above still occurs...

 

by: gregoryyoungPosted on 2007-01-29 at 12:37:31ID: 18422699

at whatpoint in your app is it dying? On start up? th only way the threadexception event wouldnt get calledis something like if you neer actually started up properly

 

by: drydoPosted on 2007-01-29 at 13:51:03ID: 18423309

No - sporadically during its execution.  There's no pattern to determine at which point its dying or at which milestone - the lack of info. only adds to the frustration of debugging the app.

 

by: TheLearnedOnePosted on 2007-01-30 at 09:02:01ID: 18429086

Did you look at these settings?

    Just-In-Time debugging can be enabled from Tools/Options/Debugging/Just-In-Time.

Bob

 

by: drydoPosted on 2007-01-30 at 09:36:17ID: 18429387

> Just-In-Time debugging can be enabled from Tools/Options/Debugging/Just-In-Time
The application is being ran on a deployment machine, e.g. there is no Studio installed.

Note: I have the SDK installed with the appropriate option set - but alas, no joy.

 

by: TheLearnedOnePosted on 2007-01-30 at 09:45:54ID: 18429475

Do you have this file?

    C:\Windows\System32\vsjitdebugger.exe

and this registry key:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\.NETFramework\DbgManagedDebugger

Bob

 

by: drydoPosted on 2007-01-31 at 01:21:45ID: 18434485

Yep - both there

 

by: TheLearnedOnePosted on 2007-01-31 at 04:29:53ID: 18435201

Ok, let's start piling on the resources here to try to help uncover the inner workings of JIT compiler:

1) Enabling JIT-attach Debugging
http://msdn2.microsoft.com/en-us/library/2ac5yxx6.aspx

HKEY_LOCAL_MACHINE\Software\Microsoft\.NETFramework\DbgJITDebugLaunchSetting.
If value = 16, in the .NET Framework version 2.0 only, the runtime presents the message box described above for processes that are interactive with the desktop. For processes that are not interactive, the runtime spawns the debugger listed in the DbgManagedDebugger registry key. This is the default setting for the .NET Framework version 2.0.

Mine = 0x10 (16)

HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\Current Version\AeDebug\Debugger
Mine = "C:\WINDOWS\system32\vsjitdebugger.exe" -p %ld -e %ld

2) Did you add this to the application.exe.config file?

      <system.windows.forms jitDebugging="true"/>

3) What is the configuration for the application?  Debug or Release?

4) Was there a .pdb file created?

5) Here is a good CodeProject article about debugging:

    Windows Debuggers: Part 1: A WinDbg Tutorial
    http://www.codeproject.com/debug/windbg_part1.asp

Bob

 

by: drydoPosted on 2007-01-31 at 09:21:25ID: 18437586

Okey dokey,

1. Been there, all configured and matching your config.
2. Sure did (first post ;-) )
3. Debug (first post ;-) )
4. On the development machine - yes.  At some stage I copied the PDB files over thinking that the debugger was falling over because its wanted these file - no good.
5. Wow - a cool article.  In fact, by installing the WinDbg debugger, configuring it and utilising the sos.dll - I managed get the exception message.  For prosperity I blogged it up just here -> http://blogs.vbcity.com/drydo/archive/2007/01/31/8172.aspx

Thanx for pointers and whilst I would have to preferred to have enabled the VS JitDebugger - this is better than nothing.  Chrs

 

by: TheLearnedOnePosted on 2007-01-31 at 09:37:06ID: 18437745

Chris,

I am wondering if this is a problem with Windows XP Home edition?  I have no way to test that theory.

Bob

 

by: drydoPosted on 2007-02-01 at 01:20:18ID: 18442965

Yeah - I mentioned this in the article and tried a couple of XP Home configurations.  Personally I'm leaning towards the issue being an MS Update style problem.  Ho hum :)

20120131-EE-VQP-002

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