[Pnet-developers] [Bug #3669] Custom marshalers do not work properly

[nobody]

=================== BUG #3669: LATEST MODIFICATIONS ==================
http://savannah.gnu.org/bugs/?func=detailbug&bug_id=3669&group_id=353

Changes by: Gopal.V <address@hidden>
Date: Mon 06/02/03 at 01:17 (Asia/Calcutta)

            What     | Removed                   | Added
---------------------------------------------------------------------------
          Resolution | None                      | Fixed
              Status | Open                      | Closed


------------------ Additional Follow-up Comments ----------------------------
It's working now or has been for a few days or so



=================== BUG #3669: FULL BUG SNAPSHOT ===================


Submitted by: mathpup                 Project: DotGNU Portable.NET          
Submitted on: Sun 05/18/03 at 11:27
Category:  None                       Severity:  5 - Major                  
Bug Group:  None                      Resolution:  Fixed                    
Assigned to:  None                    Status:  Closed                       

Summary:  Custom marshalers do not work properly

Original Submission:  The bug report has more information than I would usually 
give because the topic is less likely to be familiar.

The documentation on implementing custom marshalers is quite vague, and further 
information is very scarce. However, I able to put together a trivial example 
of a custom marshaler to see if I could get it working.

The sample marshaler takes an Ansi C-string from unmanaged code and turns it 
into a C# string, placing asterisks around the string to differentiate this 
from the default marshaling.

The program creates a C# delegate that is indirectly invoked from unmanaged 
code, to test the marshaling.

With Rotor, I get the output "s = *ABC*".
With ilrun, I get "s = *v
    address@hidden"

This might be bug in Marshal.PtrToStringAnsi() or in custom marshaling 
component of the runtime.

I'm attaching a test case.

1. Build a shared lib of invoke.cpp: cpp -shared -o libtest.so invoke.cpp
2. Build the C# test: cscc -o MyMarshal.exe MyMarshal.cs
3. Run the program: ilrun MyMarshal.exe


Follow-up Comments
*******************

-------------------------------------------------------
Date: Mon 06/02/03 at 01:17         By: t3rmin4t0r
It's working now or has been for a few days or so

-------------------------------------------------------
Date: Sun 05/18/03 at 11:31         By: mathpup
Adding  Console.WriteLine( pNativeData ); to
MarshalNativeToManaged shows that with ilrun the address is -1073747212, which 
looks very suspicious.



CC list is empty


File Attachments
****************

-------------------------------------------------------
Date: Sun 05/18/03 at 11:27  Name: MyMarshal.cs  Size: 1KB   By: mathpup
Test case
http://savannah.gnu.org/bugs/download.php?group_id=353&amp;bug_id=3669&amp;bug_file_id=459


For detailed info, follow this link:
http://savannah.gnu.org/bugs/?func=detailbug&bug_id=3669&group_id=353