Exception code: 0xc00000fd

Question

Scenario

We have site in ASP.NET (C#) which gives call to Win32 dll (with MFC used - Native code). It works in debug mode. But when i used the same dll with published site, i get following exception.

Used P/Invoke to call functions from Win32 dll

Everything works fine if buffer length is kept low like - 

TCHAR users[BUFSIZE] = {'0'}; where BUFSIZE = 9999 

If we increase BUFSIZE = 99999, w3wp.exe crashes hard.

Any clues how can this be fixed?

Thanks,

Sachin

Following exception is thrown.

Faulting application name: w3wp.exe, version: 7.5.7600.16385, time stamp: 0x4a5bcd2b

Faulting module name: PTLicenseMgmnt.dll, version: 1.0.0.0, time stamp: 0x4c378b13

Exception code: 0xc00000fd

Fault offset: 0x00019bf7

Faulting process id: 0x%9

Faulting application start time: 0x%10

Faulting application path: %11

Faulting module path: %12

Report Id: %13

Answer 1

I'm guessing you are defining BUFSIZE as an Int32?  If the win32.dll expects an integer, than it's actually expecting a 16-bit integer, and not a 32-bit integer.

When BUFSIZE = 9999, this value is less than the maximum size of a 16-bit value of 32,767.

When BUFSIZE = 99999, this value is greater than the maximum size of a 16-bit value of 32,767.

EDIT:  After re-reading where you using BUFSIZE, I see that it's for defining an array.  I'm thinking that the maximum size the P/Invoke method will accept for that array is an array size that does NOT exceed the 16-bit value, so Int16.

Hope this helps :)

Answer 2

The code works for both 9999 and 99999 in debug mode.

Works with C# .Net dll

Works with ASP.NET.

 

Problem occurs with release mode and published site.

Any clues?

 

Thanks,

Sachin

Answer 3

With some code changes I am able to pass on stringbuilder with buffer of 99999 to win 32 dll.

Actual issue occurs if i have that much buffer inside function using registry functions

 

I am sure I am missing something .... do not what is that.

 

Thanks,

Sachin