[Mono-list] dlopen problem on Mono 2.4.4

[Stifu]

Chances are you're going to be told you're running an old Mono version and
should try with a more recent one.
Can you upgrade?


batuakan wrote:
> 
> Hello,
> 
> I have been trying to write a simple c# program to dynamically load a
> shared object file under mono 2.4.4, in linux environment. My call to
> dlload function ends up a SIGSEGV and the application exits I tried with
> several shared objects, the system seems to be able find them, but still
> unable to load. What might be the problem?
> 
> Thanks
> Batu
> 
> c# source code
> -----------------
> 
> using System;
> using System.ComponentModel;
> using System.Runtime.InteropServices;
> 
> 
> namespace swi
> {
> 	class MainClass
> 	{
> 
> 		[DllImport("libdl.so", CallingConvention = CallingConvention.Cdecl,
> CharSet = CharSet.Auto)]
> 		private static extern IntPtr dlopen([In] string filename, [In] int
> flags);
> 
> 		public static void Main (string[] args)
> 		{
> 			IntPtr handle = dlopen("libc.so.6", 0x02);
> 			if (handle == null)
> 				Console.WriteLine("Unable to load shared object");
> 			else 
> 				Console.WriteLine("Shared object successfully loaded");
> 		}
> 	}
> }
> 
> Application Output
> ---------------------
> 
> Module loaded: swi, Version=1.0.4044.28138, Culture=neutral,
> PublicKeyToken=null.
> Stacktrace:
> 
>   at (wrapper managed-to-native) swi.MainClass.dlopen (string,int)
> <0x00004>
>   at (wrapper managed-to-native) swi.MainClass.dlopen (string,int)
> <0xffffffff>
>   at swi.MainClass.Main (string[]) [0x00000] in
> /home/batuakan/Projects/swi/Main.cs:16
>   at (wrapper runtime-invoke) swi.MainClass.runtime_invoke_void_object
> (object,intptr,intptr,intptr) <0xffffffff>
> 
> Native stacktrace:
> 
> 	/usr/bin/mono() [0x80ca6e4]
> 	/usr/bin/mono() [0x80f6893]
> 	[0xb77cd410]
> 	/lib/ld-linux.so.2(+0x11688) [0xb77df688]
> 	/usr/lib/libdl.so(+0xc0b) [0xb6ff0c0b]
> 	/lib/ld-linux.so.2(+0xd7e6) [0xb77db7e6]
> 	/usr/lib/libdl.so(+0x109c) [0xb6ff109c]
> 	/usr/lib/libdl.so(dlopen+0x41) [0xb6ff0b41]
> 	[0xb6ff53a9]
> 	[0xb6ff52f9]
> 	[0xb6ff525b]
> 	/usr/bin/mono(mono_runtime_exec_main+0xde) [0x8113b1e]
> 	/usr/bin/mono(mono_runtime_run_main+0x15a) [0x811429a]
> 	/usr/bin/mono(mono_debugger_main+0x77) [0x80f9e67]
> 	/usr/bin/mono(mono_main+0x150c) [0x80b316c]
> 	/usr/bin/mono() [0x805ad25]
> 	/lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xe6) [0xb7551bd6]
> 	/usr/bin/mono() [0x805ac61]
> 
> =================================================================
> Got a SIGSEGV while executing native code. This usually indicates
> a fatal error in the mono runtime or one of the native libraries 
> used by your application.
> =================================================================
> 
> Thread 2 exited.
> Thread 3 exited.
> Thread 1 exited.
> Process 1 exited.
> Target exited.
> 
> 
> 
> 

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