[Mono-bugs] [Bug 660015] Getting errors and crash while invoking Activator.CreateInstanceFrom()

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https://bugzilla.novell.com/show_bug.cgi?id=660015

https://bugzilla.novell.com/show_bug.cgi?id=660015#c3


--- Comment #3 from mike guman <mguman at knology.net> 2010-12-23 17:37:49 UTC ---
Luis,

Ok, rewrote to use p/Invoke with a true native DLL (extern C, no name mangling
here) and it appears that I am back to *square one* with the 'File not found
exception'.

If I p/Invoke to a single native dll, all is fine. However if that dll depends
on a secondary native 

dll, I get an "unhandled exception: System.DLLNotFoundException". Again, this
scenario works fine under 

NET, fails under 2.8

The issue seems to be related to p/Invoking to a dynamic link library which
depends on a second native dll.

Here is a tiny example of all codes involved which may help highlight the
issue. Note the native dlls 

are in a sub-folder 'native' to the executing app path.
--------------------------------------------------------------------------
First DLL (Test_Native.dll) source :
//------------
// MyLib.h
//------------
#pragma once

extern "C" {
_declspec(dllexport) void Test();
}
//----------
//MyLib.cpp
//----------
#include <iostream>
#include <stdio.h>
#include <exception>
#include "MyLib.h"
#include "MyEnviron.h"

using namespace std;

    void Test()
    {
        foo();
        printf("ok.");
    }


Second DLL (Environ.dll) Source:
//-------------------
//MyEnviron.h
//-------------------
extern "C" { __declspec(dllexport) void foo(); }

//-------------------
//MyEnviron.cpp
//-------------------
#include <iostream>
#include <stdio.h>
#include <exception>
#include "MyEnviron.h"

using namespace std;
void foo()
{
    printf("dyn ok.");
}


// Test C# driver
//
//------------------
using System;
using System.Runtime.InteropServices;
using System.IO;

namespace PInvoke_Test
{
    class MainClass
    {
        public static void Main (string[] args)
        {
            _Test();
        }            
        // Test Method
        [DllImport("Native\\Test_Native.dll",
        EntryPoint = "Test",
        ExactSpelling = false,
        CallingConvention = CallingConvention.StdCall)]
        static extern void _Test();        
    }
}

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