static void vlc_object_destroy( vlc_object_t *p_this );
static void vlc_object_detach_unlocked (vlc_object_t *p_this);
-#ifdef LIBVLC_REFCHECK
-static vlc_threadvar_t held_objects;
-typedef struct held_list_t
-{
- struct held_list_t *next;
- vlc_object_t *obj;
-} held_list_t;
-static void held_objects_destroy (void *);
-#endif
-
/*****************************************************************************
* Local structure lock
*****************************************************************************/
object_counter = 0; /* reset */
p_priv->next = p_priv->prev = p_new;
vlc_mutex_init( &structure_lock );
-#ifdef LIBVLC_REFCHECK
- /* TODO: use the destruction callback to track ref leaks */
- vlc_threadvar_create( &held_objects, held_objects_destroy );
-#endif
}
else
{
p_priv->pipes[0] = p_priv->pipes[1] = -1;
p_priv->next = VLC_OBJECT (p_libvlc_global);
-#if !defined (LIBVLC_REFCHECK)
- /* ... */
-#elif defined (LIBVLC_USE_PTHREAD)
- p_priv->creator_id = pthread_self ();
-#elif defined (WIN32)
- p_priv->creator_id = GetCurrentThreadId ();
-#endif
vlc_mutex_lock( &structure_lock );
p_priv->prev = vlc_internals (p_libvlc_global)->prev;
vlc_internals (p_libvlc_global)->prev = p_new;
/* We are the global object ... no need to lock. */
vlc_mutex_destroy( &structure_lock );
-#ifdef LIBVLC_REFCHECK
- held_objects_destroy( vlc_threadvar_get( &held_objects ) );
- vlc_threadvar_delete( &held_objects );
-#endif
}
FREENULL( p_this->psz_object_name );
/* Increment the counter */
internals->i_refcount++;
vlc_spin_unlock( &internals->ref_spin );
-#ifdef LIBVLC_REFCHECK
- /* Update the list of referenced objects */
- /* Using TLS, so no need to lock */
- /* The following line may leak memory if a thread leaks objects. */
- held_list_t *newhead = malloc (sizeof (*newhead));
- held_list_t *oldhead = vlc_threadvar_get (&held_objects);
- newhead->next = oldhead;
- newhead->obj = p_this;
- vlc_threadvar_set (&held_objects, newhead);
-#endif
}
/*****************************************************************************
vlc_object_internals_t *internals = vlc_internals( p_this );
bool b_should_destroy;
-#ifdef LIBVLC_REFCHECK
- /* Update the list of referenced objects */
- /* Using TLS, so no need to lock */
- for (held_list_t *hlcur = vlc_threadvar_get (&held_objects),
- *hlprev = NULL;
- hlcur != NULL;
- hlprev = hlcur, hlcur = hlcur->next)
- {
- if (hlcur->obj == p_this)
- {
- if (hlprev == NULL)
- vlc_threadvar_set (&held_objects, hlcur->next);
- else
- hlprev->next = hlcur->next;
- free (hlcur);
- break;
- }
- }
- /* TODO: what if releasing without references? */
-#endif
-
vlc_spin_lock( &internals->ref_spin );
assert( internals->i_refcount > 0 );
ListChildren( p_list, p_tmp, i_type );
}
}
-
-#ifdef LIBVLC_REFCHECK
-# if defined(HAVE_EXECINFO_H) && defined(HAVE_BACKTRACE)
-# include <execinfo.h>
-# endif
-
-void vlc_refcheck (vlc_object_t *obj)
-{
- static unsigned errors = 0;
- if (errors > 100)
- return;
-
- /* Anyone can use the root object (though it should not exist) */
- if (obj == VLC_OBJECT (vlc_global ()))
- return;
-
- /* Anyone can use its libvlc instance object */
- if (obj == VLC_OBJECT (obj->p_libvlc))
- return;
-
- /* The thread that created the object holds the initial reference */
- vlc_object_internals_t *priv = vlc_internals (obj);
-#if defined (LIBVLC_USE_PTHREAD)
- if (pthread_equal (priv->creator_id, pthread_self ()))
-#elif defined WIN32
- if (priv->creator_id == GetCurrentThreadId ())
-#else
- if (0)
-#endif
- return;
-
- /* A thread can use its own object without references! */
- vlc_object_t *caller = vlc_threadobj ();
- if (caller == obj)
- return;
-#if 0
- /* The calling thread is younger than the object.
- * Access could be valid through cross-thread synchronization;
- * we would need better accounting. */
- if (caller && (caller->i_object_id > obj->i_object_id))
- return;
-#endif
- int refs;
- vlc_spin_lock (&priv->ref_spin);
- refs = priv->i_refcount;
- vlc_spin_unlock (&priv->ref_spin);
-
- for (held_list_t *hlcur = vlc_threadvar_get (&held_objects);
- hlcur != NULL; hlcur = hlcur->next)
- if (hlcur->obj == obj)
- return;
-
- int canc = vlc_savecancel ();
-
- fprintf (stderr, "The %s %s thread object is accessing...\n"
- "the %s %s object without references.\n",
- caller && caller->psz_object_name
- ? caller->psz_object_name : "unnamed",
- caller ? caller->psz_object_type : "main",
- obj->psz_object_name ? obj->psz_object_name : "unnamed",
- obj->psz_object_type);
- fflush (stderr);
-
-#ifdef HAVE_BACKTRACE
- void *stack[20];
- int stackdepth = backtrace (stack, sizeof (stack) / sizeof (stack[0]));
- backtrace_symbols_fd (stack, stackdepth, 2);
-#endif
-
- if (++errors == 100)
- fprintf (stderr, "Too many reference errors!\n");
- vlc_restorecancel (canc);
-}
-
-static void held_objects_destroy (void *data)
-{
- VLC_UNUSED( data );
- held_list_t *hl = vlc_threadvar_get (&held_objects);
- vlc_object_t *caller = vlc_threadobj ();
-
- int canc = vlc_savecancel ();
-
- while (hl != NULL)
- {
- held_list_t *buf = hl->next;
- vlc_object_t *obj = hl->obj;
-
- fprintf (stderr, "The %s %s thread object leaked a reference to...\n"
- "the %s %s object.\n",
- caller && caller->psz_object_name
- ? caller->psz_object_name : "unnamed",
- caller ? caller->psz_object_type : "main",
- obj->psz_object_name ? obj->psz_object_name : "unnamed",
- obj->psz_object_type);
- free (hl);
- hl = buf;
- }
- vlc_restorecancel (canc);
-}
-#endif
projects / vlc / blobdiff