need urgent help to deebug a process

[Tony Johansson]

Hello!

We have a C#.ASP.NET web application that runs on a IIS 6. The application
contains actually several asp pages but there is no GUI.
The application receive an xml file that is processed.
There is also an MFC dll that is called from this asp application to make a
syntax check on quite many commands.
You don't have to know what a command is.

The problem that we get is the following when the asp pages calls the MFC
dll it will run into protected memory error.
The IIS runs on a windows server 2003.
We have also added some rows in the MFC dll to write to a file about where
in the
dll it is executing and also write some value for different variables.

We have also build the dll in debug mode and copied it to the windows server
2003 and it will result in the same protected memory error.

Another thing that is of interest is that if we run the built-in application
server in Visual Studio which exist by default we never get any kind of
error. Note I don't mean IIS here.

This is strange because when we run the built-in application server the asp
will call the MFC dll but when we run it in this way we never get any
kind of problem.

We have also copied and change the asp pages to be runable in a windows form
application which will call the
MFC dll and here we never get any kind of problem either.

Another very strange thing is that when we add statements to write to a file
it might cause the application to work.

So if we have for example 10 statement to write to a file in
the MFC DLL we get protected memory but if we then
add some more statement to write to a file it might cause the application to
work
and NOT cause any protected memeory.

I hope to get some information about this strange problem that we have.
For example I wonder about the row that cause the crash.
As I said before it sounds strange that there should be an error on that row
when it works when we run and call the MFC dll in two different local modes
which are.
1. Use Visual Studio and the built-in application server
2. Use Windows forms that call the MFC dll

I have now installed the local IIS.

What I want to do is debug the process that is calling the MFC DLL is that
possible?
Can somebody explain the steps that need to be done if I want to debug the
MFC dll
from within VS.


//Tony

 

[Anthony Jones]

Hello!

We have a C#.ASP.NET web application that runs on a IIS 6. The application
contains actually several asp pages but there is no GUI.
The application receive an xml file that is processed.
There is also an MFC dll that is called from this asp application to make
a
syntax check on quite many commands.
You don't have to know what a command is.

The problem that we get is the following when the asp pages calls the MFC
dll it will run into protected memory error.
The IIS runs on a windows server 2003.
We have also added some rows in the MFC dll to write to a file about where
in the
dll it is executing and also write some value for different variables.

We have also build the dll in debug mode and copied it to the windows
server
2003 and it will result in the same protected memory error.

Another thing that is of interest is that if we run the built-in
application
server in Visual Studio which exist by default we never get any kind of
error. Note I don't mean IIS here.

This is strange because when we run the built-in application server the
asp
will call the MFC dll but when we run it in this way we never get any
kind of problem.

We have also copied and change the asp pages to be runable in a windows
form
application which will call the
MFC dll and here we never get any kind of problem either.

Another very strange thing is that when we add statements to write to a
file
it might cause the application to work.

So if we have for example 10 statement to write to a file in
the MFC DLL we get protected memory but if we then
add some more statement to write to a file it might cause the application
to work
and NOT cause any protected memeory.

I hope to get some information about this strange problem that we have.
For example I wonder about the row that cause the crash.
As I said before it sounds strange that there should be an error on that
row
when it works when we run and call the MFC dll in two different local
modes
which are.
1. Use Visual Studio and the built-in application server
2. Use Windows forms that call the MFC dll

I have now installed the local IIS.

What I want to do is debug the process that is calling the MFC DLL is that
possible?
Can somebody explain the steps that need to be done if I want to debug the
MFC dll
from within VS.

Not sure what this has to do with C# however...

You've got the MFC project on your local machine and the website also so.
Build a debug version of the project and have the web app use that dll from
its build location. In VS with the project loaded attach native debugging
to the w3wp.exe process that represents your web app. Now you can set break
points in your MFC code to trace through what is happening.

 

[Tony Johansson]

Hello!

So you mean I first start the asp.net web application from my local IIS
which is from within VS.
I just wonder at what point do I attach to the process w3wp you meantioned
in your main

//Tony

 

[Anthony Jones]

Hello!

So you mean I first start the asp.net web application from my local IIS
which is from within VS.
I just wonder at what point do I attach to the process w3wp you meantioned
in your main

Yes you'll need to make at least one request into the app to get it spun up.
If you are using XP its not called w3wp.exe it will called aspnet_wp.exe in
which case you need to make at least one request that invokes a .NET handler
such as an aspx or ashx request.