This is a page gathering how-tos and links to relevant information to get some things running.

At some point in the past, I did manage to have the rClr native code debugged from Monodevelop. I think, anyway. Seems I cannot anymore.

Now regarding how to figure how the following issue, which ends up with the R console spitting the dummy. How to set up the mono soft debugger to attach to the R process.

Unhandled Exception: System.NullReferenceException: Object reference not set to an instance of an object
  at RDotNet.Devices.CharacterDeviceAdapter.ResetConsole () [0x00000] in <filename unknown>:0 

• http://lists.ximian.com/pipermail/mono-devel-list/2012-November/039817.html
• http://www.jeffongames.com/2012/03/debugging-embedded-mono/
• http://stackoverflow.com/questions/9582365/debugging-w-embedded-mono-how-to-set-breakpoints-in-c-sharp-code

export MONODEVELOP_SDB_TEST=1

Seems that following the instructions work. Can hook up breakpoints. However when trying to debug the R.NET related issue, catching the exception fails. The mono runtime spits the dummy with a SIGSEV.

Aside from valgrind, sayw the mention on the R-devel mailing list of the AddressSanitizer. Seems to be soon included in LLVM clang and gcc.

The following links stem from looking how to invoke from rClr.dll a managed method such as public object CreateSomeRdotNetStructure(IntPtr ptr, int sexptype). It looks like the corresponding type to IntPtr is (void *), but while P/Invoke from C# works, rdotnet as a proof, I could not find the other way around to obtain an IntPtr. I think I could create the IntPtr in C# from end int or long, but this is where the rub is: a platform-dependent code...

• Platform Invoke Data Types
• VARIANT Type Constants
• May be of interest:
  • http://msdn.microsoft.com/en-us/library/bb162198(v=vs.110).aspx
  • http://stackoverflow.com/questions/9591579/clr-hosting-call-a-function-with-an-arbitrary-method-signature
  • http://www.codeproject.com/Articles/12662/Unmanaged-to-Managed-calls-C-to-C-without-Regasm
  • http://social.msdn.microsoft.com/Forums/en/clr/thread/3591cce9-e0f1-4c4e-8ad3-5952e9114ede
• VARIANT structure
• http://atom0s.wordpress.com/2012/11/30/native-clr-hosting-with-separate-appdomains-per-module
• An interested pointer, albeit not actively maintained: http://clrinterop.codeplex.com/

Read http://www.codeproject.com/Articles/416471/CLR-Hosting-Customizing-the-CLR and the follow up article.