/*
* if type == -1, change the target of the handle, otherwise allocate a new handle.
*/
guint32
ves_icall_System_GCHandle_GetTargetHandle (MonoObject *obj, guint32 handle, gint32 type)
{
if (type == -1) {
mono_gchandle_set_target (handle, obj);
/* the handle doesn't change */
return handle;
}
switch (type) {
case HANDLE_WEAK:
return mono_gchandle_new_weakref (obj, FALSE);
case HANDLE_WEAK_TRACK:
return mono_gchandle_new_weakref (obj, TRUE);
case HANDLE_NORMAL:
return mono_gchandle_new (obj, FALSE);
case HANDLE_PINNED:
return mono_gchandle_new (obj, TRUE);
default:
g_assert_not_reached ();
}
return 0;
}
//FIXME inline
void
mono_gchandle_set_target_handle (guint32 gchandle, MonoObjectHandle obj)
{
mono_gchandle_set_target (gchandle, MONO_HANDLE_RAW (obj));
}
/*
* actually, we might want to queue the finalize requests in a separate thread,
* but we need to be careful about the execution domain of the thread...
*/
void
mono_gc_run_finalize (void *obj, void *data)
{
MonoObject *exc = NULL;
MonoObject *o;
#ifndef HAVE_SGEN_GC
MonoObject *o2;
#endif
MonoMethod* finalizer = NULL;
MonoDomain *caller_domain = mono_domain_get ();
MonoDomain *domain;
RuntimeInvokeFunction runtime_invoke;
GSList *l, *refs = NULL;
o = (MonoObject*)((char*)obj + GPOINTER_TO_UINT (data));
if (suspend_finalizers)
return;
domain = o->vtable->domain;
#ifndef HAVE_SGEN_GC
mono_domain_finalizers_lock (domain);
o2 = g_hash_table_lookup (domain->finalizable_objects_hash, o);
refs = mono_gc_remove_weak_track_object (domain, o);
mono_domain_finalizers_unlock (domain);
if (!o2)
/* Already finalized somehow */
return;
#endif
if (refs) {
/*
* Support for GCHandles of type WeakTrackResurrection:
*
* Its not exactly clear how these are supposed to work, or how their
* semantics can be implemented. We only implement one crucial thing:
* these handles are only cleared after the finalizer has ran.
*/
for (l = refs; l; l = l->next) {
guint32 gchandle = GPOINTER_TO_UINT (l->data);
mono_gchandle_set_target (gchandle, o);
}
g_slist_free (refs);
}
/* make sure the finalizer is not called again if the object is resurrected */
object_register_finalizer (obj, NULL);
if (o->vtable->klass == mono_defaults.internal_thread_class) {
MonoInternalThread *t = (MonoInternalThread*)o;
if (mono_gc_is_finalizer_internal_thread (t))
/* Avoid finalizing ourselves */
return;
if (t->threadpool_thread && finalizing_root_domain) {
/* Don't finalize threadpool threads when
shutting down - they're finalized when the
threadpool shuts down. */
add_thread_to_finalize (t);
return;
}
}
if (o->vtable->klass->image == mono_defaults.corlib && !strcmp (o->vtable->klass->name, "DynamicMethod") && finalizing_root_domain) {
/*
* These can't be finalized during unloading/shutdown, since that would
* free the native code which can still be referenced by other
* finalizers.
* FIXME: This is not perfect, objects dying at the same time as
* dynamic methods can still reference them even when !shutdown.
*/
return;
}
if (mono_runtime_get_no_exec ())
return;
/* speedup later... and use a timeout */
/* g_print ("Finalize run on %p %s.%s\n", o, mono_object_class (o)->name_space, mono_object_class (o)->name); */
/* Use _internal here, since this thread can enter a doomed appdomain */
mono_domain_set_internal (mono_object_domain (o));
/* delegates that have a native function pointer allocated are
* registered for finalization, but they don't have a Finalize
* method, because in most cases it's not needed and it's just a waste.
*/
if (o->vtable->klass->delegate) {
MonoDelegate* del = (MonoDelegate*)o;
if (del->delegate_trampoline)
mono_delegate_free_ftnptr ((MonoDelegate*)o);
mono_domain_set_internal (caller_domain);
return;
}
finalizer = mono_class_get_finalizer (o->vtable->klass);
#ifndef DISABLE_COM
/* If object has a CCW but has no finalizer, it was only
* registered for finalization in order to free the CCW.
* Else it needs the regular finalizer run.
* FIXME: what to do about ressurection and suppression
* of finalizer on object with CCW.
*/
if (mono_marshal_free_ccw (o) && !finalizer) {
mono_domain_set_internal (caller_domain);
return;
}
#endif
/*
* To avoid the locking plus the other overhead of mono_runtime_invoke (),
* create and precompile a wrapper which calls the finalize method using
* a CALLVIRT.
*/
if (!domain->finalize_runtime_invoke) {
MonoMethod *invoke = mono_marshal_get_runtime_invoke (mono_class_get_method_from_name_flags (mono_defaults.object_class, "Finalize", 0, 0), TRUE);
domain->finalize_runtime_invoke = mono_compile_method (invoke);
}
runtime_invoke = domain->finalize_runtime_invoke;
mono_runtime_class_init (o->vtable);
runtime_invoke (o, NULL, &exc, NULL);
if (exc) {
/* fixme: do something useful */
}
mono_domain_set_internal (caller_domain);
}