Microsoft KB Archive/923325

= FIX: When you use the Native Image Generator (Ngen.exe) in the .NET Framework 2.0, the size of the stack frames increases significantly =

Article ID: 923325

Article Last Modified on 4/16/2007

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APPLIES TO


 * Microsoft .NET Framework 1.1

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SYMPTOMS
When you use the Native Image Generator (Ngen.exe) in the Microsoft .NET Framework 2.0, the size of the stack frames increases significantly.

Note When you compile the same code by using the just-in-time (JIT) compiler, the same code consumes much less of the stack.



CAUSE
The JIT compiler has a mode in which most of the optimizations are turned off when you compile very large methods. However, the Native Image Generator does not have this mode. Therefore, the code that the Native Image Generator generates may put methods inline in a large method that already has many local variables. This behavior creates even more local variables for the large method. Additionally, this behavior produces very large stack frames that consume lots of the stack space.



Hotfix information
A supported hotfix is now available from Microsoft. However, it is intended to correct only the problem that is described in this article. Apply it only to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next .NET Framework 2.0 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Customer Support Services to obtain the hotfix. For a complete list of Microsoft Customer Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

Prerequisites
The following list contains prerequisites for the hotfix:
 * The .NET Framework 2.0

Restart requirement
You do not have to restart the computer after you apply this hotfix.

Hotfix replacement information
This hotfix does not replace a previously released hotfix.

File information
The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.

IA-64-based computers


STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.



MORE INFORMATION
For more information, click the following article number to view the article in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates

For more information about interop debugging, visit the following Microsoft Web site:

http://blogs.msdn.com/jmstall/archive/2005/01/28/362169.aspx

Additional query words: NGEN Ngen.exe

Keywords: kbexpertiseadvanced kbcodegen kbjit kbcompiler kbbug kbfix kbqfe kbhotfixserver kbpubtypekc KB923325

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