Unmanaged exceptions

Hi Gurus,
I am porting my application C# which is using several unmanaged c++ DLL's to 64 bit.
On 32 bits it' works just fine.
C++: throw
C#: catch as a SEHException

On 64 bits(Vista, 7) i have an application crash. I can't catch any of these exceptions...
Any ideas?

You can use catch withou exception type, it should catch all exceptions including unmanaged.

Code:

---

try
{
 ....
}
catch
{
 ...
}

---

I tried it without any success.
The application just crashes whenever i try to throw from unmanaged c++ DLL.
Fault module name:StackHash_579c... Not mine...

I don't know if this will work, but try adding a handler to the UnhandledException.
Something like:

Code:

---

AppDomain.CurrentDomain.UnhandledException += UnhandledExceptionEventRaised;

---

and then make a method to catch it:

Code:

---

private static void UnhandledExceptionEventRaised(object sender, UnhandledExceptionEventArgs e)
{
//do stuff here
}

---

But I'm unsure if it will catch your exceptions.

Can you rebuild the C++ dlls for 64-bit?

Thanks for trying, but it doesn't help..

The DLL's are native 64 bit

Quote:

---

Originally Posted by urisol

The DLL's are native 64 bit

---

Help clear up some confusion, please.

Are you saying that you've already rebuild the 32-bit dlls for 64-bit?

If so, how do you know they work as 64-bit? What I would do is write some C++ unit tests to debug the dlls.

Once you know they work in a 64-bit environment, then you can get them working under .Net.

What does happen if you check C++ Exceptions in Debug/Exceptions dialog and run the application under debugger. Are you able to determine the exact exception? Maybe it is rewrapped in some way or it could be a security exception because your applications lacks some permission.

Yes i have already rebuilt my C++ DLL's for 64 bit and they work just fine.
Actually the whole application .NET / C++/drivers woks fine except of the unmanaged interrupts issue.
I see the crash only if i test the unmnaged interrupts flows or just call to c++ foo function from C#(PInvoke)

c++:
extern "C" XXINTERFACE_API void foo()throw(...);
void foo()
{
throw blabla;
}
I tried to make Blabla to be a native type (int) with no effect..

I will try to establish 64 bit development environment(mine is 32... cross compiler issue?), to see what happens under debug..