if (tc->destruction_listeners) {
uint64_t i;
BT_LIB_LOGV("Calling trace class destruction listener(s): %!+T", tc);
+
+ /*
+ * The trace class' reference count is 0 if we're here. Increment
+ * it to avoid a double-destroy (possibly infinitely recursive).
+ * This could happen for example if a destruction listener did
+ * bt_object_get_ref() (or anything that causes
+ * bt_object_get_ref() to be called) on the trace class (ref.
+ * count goes from 0 to 1), and then bt_object_put_ref(): the
+ * reference count would go from 1 to 0 again and this function
+ * would be called again.
+ */
+ tc->base.ref_count++;
+
/* Call all the trace class destruction listeners */
for (i = 0; i < tc->destruction_listeners->len; i++) {
struct bt_trace_class_destruction_listener_elem elem =
if (elem.func) {
elem.func(tc, elem.data);
}
+
+ /*
+ * The destruction listener should not have kept a
+ * reference to the trace class.
+ */
+ BT_ASSERT_PRE(tc->base.ref_count == 1, "Destruction listener kept a reference to the trace class being destroyed: %![tc-]+T", tc);
}
g_array_free(tc->destruction_listeners, TRUE);
tc->destruction_listeners = NULL;