[Mono-list] Finalization cycle involving ... errors

[Adam Treat]

About the "Finalization cycle involving ... " errors.
 
The fix is to replace the 'GC_register_finalizer' call in 
mono/mono/metadata/gc.c with 'GC_register_finalizer_no_order'.  According to 
the source documentation in boehm GC, the 'no_order' call is:

/*
 * A version of GC_register_finalizer that allows the object to be
 * finalized before the objects it references.  This is again error
 * prone, in that it makes it easy to accidentally reference finalized
 * objects.  Again, recommended only for JVM implementors.
 */

I believe this applies to the .NET/CLR as well as the JVM, but am not 
completely sure.  This eliminates those errors in Qt# though ...

Here is the trivial patch ;)

Index: gc.c
===================================================================
RCS file: /cvs/public/mono/mono/metadata/gc.c,v
retrieving revision 1.18
diff -u -3 -p -u -r1.18 gc.c
--- gc.c        11 Oct 2002 20:24:11 -0000      1.18
+++ gc.c        10 Nov 2002 16:58:49 -0000
@@ -69,7 +69,7 @@ object_register_finalizer (MonoObject *o
        guint offset = 0;

        g_assert (GC_base (obj) == (char*)obj - offset);
-       GC_register_finalizer ((char*)obj - offset, callback, GUINT_TO_POINTER 
(offset), NULL, NULL);
+       GC_register_finalizer_no_order ((char*)obj - offset, callback, 
GUINT_TO_POINTER (offset), NULL, NULL);
 #endif
 }

Cheers,

Adam