[Mono-dev] Interop Callback Segmentation fault

[Zoltan Varga]

                                    Hi,

  This _might_ be a mono bug. Could you file a bug report and attach some
kind of self-contained testcase (a xine dependency is ok) ?

            Zoltan

On 7/11/06, Ivan N. Zlatev <contact at i-nz.net> wrote:
> Hey,
>
> I am on mono svn head and I get a segmentation fault when trying to
> use this code:
>
> ===========================================
> typedef void (*xine_event_listener_cb_t) (void *user_data,
>                                           const xine_event_t *event);
>
> void xine_event_create_listener_thread (xine_event_queue_t *queue,
>                                         xine_event_listener_cb_t callback,
>                                         void *user_data);
>
> ===========================================
>
>                 [DllImport ("libxine")]
>                 private static extern void
> xine_event_create_listener_thread (IntPtr eventQueue, XineEventHandler
> eventHandler, IntPtr data);
>
>                 public delegate void XineEventHandler (IntPtr data,
> IntPtr eventArgs);
>                 ...
>                         eventQueue = xine_event_new_queue (_stream);
>                         if (_eventQueue != IntPtr.Zero) {
>                                 xine_event_create_listener_thread
> (_eventQueue, HandleEvent, IntPtr.Zero);
>                         }
>                 ...
>
>                 private void HandleEvent (IntPtr data, IntPtr eventArgs)
>                 {
>                         Console.WriteLine ("Helllooo");
>                 }
> ===========================================
>
> This works when HandleEvent is static but else segfaults:
>
> (gdb) bt
>
> #0  0x08790f66 in ?? ()
> #1  0xb4c72a8a in listener_loop (queue_gen=0x878d670) at events.c:209
> #2  0xb7eda34b in start_thread () from /lib/libpthread.so.0
> #3  0xb7e4465e in clone () from /lib/libc.so.6
>
> (gdb) p mono_pmip (0x08790f66)
>
> Program received signal SIGSEGV, Segmentation fault.
> 0x0809603c in mono_jit_info_table_find (domain=0x0, addr=0x8790f66
> "\022") at domain.c:173
> 173             MonoJitInfoTable *table = domain->jit_info_table;
>
>
> Any ideas what am I doing wrong or if it is a mono bug?
>
> --
> Ivan N. Zlatev
>
> Web: http://www.i-nZ.net
> GPG Key: http://files.i-nZ.net/i-nZ.asc
> "It's all some kind of whacked out conspiracy."
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