lib: rename include dir to babeltrace2
[babeltrace.git] / lib / plugin / plugin-so.c
index f8fb4df8d4d688f1790f01ad4ec862c707cd768d..ec69646f99fd38f3bb4c4bc20472698aa0aebe18 100644 (file)
@@ -1,10 +1,6 @@
 /*
- * plugin-so.c
- *
- * Babeltrace Plugin (shared object)
- *
+ * Copyright 2017-2018 Philippe Proulx <pproulx@efficios.com>
  * Copyright 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com>
- * Copyright 2017 Philippe Proulx <pproulx@efficios.com>
  *
  * Author: Jérémie Galarneau <jeremie.galarneau@efficios.com>
  *
  */
 
 #define BT_LOG_TAG "PLUGIN-SO"
-#include <babeltrace/lib-logging-internal.h>
-
-#include <babeltrace/compiler-internal.h>
-#include <babeltrace/ref.h>
-#include <babeltrace/plugin/plugin-internal.h>
-#include <babeltrace/plugin/plugin-so-internal.h>
-#include <babeltrace/plugin/plugin-dev.h>
-#include <babeltrace/plugin/plugin-internal.h>
-#include <babeltrace/graph/component-class-internal.h>
-#include <babeltrace/types.h>
-#include <babeltrace/list-internal.h>
+#include <babeltrace2/lib-logging-internal.h>
+
+#include <babeltrace2/assert-internal.h>
+#include <babeltrace2/assert-pre-internal.h>
+#include <babeltrace2/compiler-internal.h>
+#include <babeltrace2/plugin/plugin-internal.h>
+#include <babeltrace2/plugin/plugin-so-internal.h>
+#include <babeltrace2/plugin/plugin-dev.h>
+#include <babeltrace2/plugin/plugin-internal.h>
+#include <babeltrace2/graph/component-class-internal.h>
+#include <babeltrace2/graph/component-class.h>
+#include <babeltrace2/graph/component-class-source.h>
+#include <babeltrace2/graph/component-class-filter.h>
+#include <babeltrace2/graph/component-class-sink.h>
+#include <babeltrace2/types.h>
+#include <babeltrace2/list-internal.h>
 #include <string.h>
 #include <stdlib.h>
 #include <glib.h>
 #define PLUGIN_SUFFIX_LEN      max_t(size_t, sizeof(NATIVE_PLUGIN_SUFFIX), \
                                        sizeof(LIBTOOL_PLUGIN_SUFFIX))
 
-#define SECTION_BEGIN(_name)           (&(__start_##_name))
-#define SECTION_END(_name)             (&(__stop_##_name))
-#define SECTION_ELEMENT_COUNT(_name) (SECTION_END(_name) - SECTION_BEGIN(_name))
-
-#define DECLARE_SECTION(_type, _name)                          \
-       extern _type __start_##_name __attribute((weak));       \
-       extern _type __stop_##_name __attribute((weak))
-
-DECLARE_SECTION(struct __bt_plugin_descriptor const *, __bt_plugin_descriptors);
-DECLARE_SECTION(struct __bt_plugin_descriptor_attribute const *, __bt_plugin_descriptor_attributes);
-DECLARE_SECTION(struct __bt_plugin_component_class_descriptor const *, __bt_plugin_component_class_descriptors);
-DECLARE_SECTION(struct __bt_plugin_component_class_descriptor_attribute const *, __bt_plugin_component_class_descriptor_attributes);
+BT_PLUGIN_MODULE();
 
 /*
  * This list, global to the library, keeps all component classes that
@@ -81,7 +71,7 @@ DECLARE_SECTION(struct __bt_plugin_component_class_descriptor_attribute const *,
  *
  * It allows this use-case:
  *
- *        my_plugins = bt_plugin_create_all_from_file("/path/to/my-plugin.so");
+ *        my_plugins = bt_plugin_find_all_from_file("/path/to/my-plugin.so");
  *        // instantiate components from a plugin's component classes
  *        // put plugins and free my_plugins here
  *        // user code of instantiated components still exists
@@ -106,17 +96,33 @@ void fini_comp_class_list(void)
 
        bt_list_for_each_entry_safe(comp_class, tmp, &component_class_list, node) {
                bt_list_del(&comp_class->node);
-               BT_PUT(comp_class->so_handle);
+               BT_OBJECT_PUT_REF_AND_RESET(comp_class->so_handle);
        }
+
        BT_LOGD_STR("Released references from all component classes to shared library handles.");
 }
 
+static inline
+const char *bt_self_plugin_status_string(enum bt_self_plugin_status status)
+{
+       switch (status) {
+       case BT_SELF_PLUGIN_STATUS_OK:
+               return "BT_SELF_PLUGIN_STATUS_OK";
+       case BT_SELF_PLUGIN_STATUS_ERROR:
+               return "BT_SELF_PLUGIN_STATUS_ERROR";
+       case BT_SELF_PLUGIN_STATUS_NOMEM:
+               return "BT_SELF_PLUGIN_STATUS_NOMEM";
+       default:
+               return "(unknown)";
+       }
+}
+
 static
 void bt_plugin_so_shared_lib_handle_destroy(struct bt_object *obj)
 {
        struct bt_plugin_so_shared_lib_handle *shared_lib_handle;
 
-       assert(obj);
+       BT_ASSERT(obj);
        shared_lib_handle = container_of(obj,
                struct bt_plugin_so_shared_lib_handle, base);
        const char *path = shared_lib_handle->path ?
@@ -126,17 +132,9 @@ void bt_plugin_so_shared_lib_handle_destroy(struct bt_object *obj)
                shared_lib_handle, path);
 
        if (shared_lib_handle->init_called && shared_lib_handle->exit) {
-               enum bt_plugin_status status;
-
                BT_LOGD_STR("Calling user's plugin exit function.");
-               status = shared_lib_handle->exit();
-               BT_LOGD("User function returned: %s",
-                       bt_plugin_status_string(status));
-
-               if (status < 0) {
-                       BT_LOGW("User's plugin exit function failed: "
-                               "path=\"%s\"", path);
-               }
+               shared_lib_handle->exit();
+               BT_LOGD_STR("User function returned.");
        }
 
        if (shared_lib_handle->module) {
@@ -157,6 +155,8 @@ void bt_plugin_so_shared_lib_handle_destroy(struct bt_object *obj)
                                BT_LOGE("Cannot close GModule: %s: path=\"%s\"",
                                        g_module_error(), path);
                        }
+
+                       shared_lib_handle->module = NULL;
 #ifndef NDEBUG
                } else {
                        BT_LOGD("Not closing GModule because `BABELTRACE_NO_DLCLOSE=1`: "
@@ -167,6 +167,7 @@ void bt_plugin_so_shared_lib_handle_destroy(struct bt_object *obj)
 
        if (shared_lib_handle->path) {
                g_string_free(shared_lib_handle->path, TRUE);
+               shared_lib_handle->path = NULL;
        }
 
        g_free(shared_lib_handle);
@@ -185,7 +186,8 @@ struct bt_plugin_so_shared_lib_handle *bt_plugin_so_shared_lib_handle_create(
                goto error;
        }
 
-       bt_object_init(shared_lib_handle, bt_plugin_so_shared_lib_handle_destroy);
+       bt_object_init_shared(&shared_lib_handle->base,
+               bt_plugin_so_shared_lib_handle_destroy);
 
        if (!path) {
                goto end;
@@ -203,7 +205,7 @@ struct bt_plugin_so_shared_lib_handle *bt_plugin_so_shared_lib_handle_create(
                 * DEBUG-level logging because we're only _trying_ to
                 * open this file as a Babeltrace plugin: if it's not,
                 * it's not an error. And because this can be tried
-                * during bt_plugin_create_all_from_dir(), it's not even
+                * during bt_plugin_find_all_from_dir(), it's not even
                 * a warning.
                 */
                BT_LOGD("Cannot open GModule: %s: path=\"%s\"",
@@ -214,7 +216,7 @@ struct bt_plugin_so_shared_lib_handle *bt_plugin_so_shared_lib_handle_create(
        goto end;
 
 error:
-       BT_PUT(shared_lib_handle);
+       BT_OBJECT_PUT_REF_AND_RESET(shared_lib_handle);
 
 end:
        if (shared_lib_handle) {
@@ -234,9 +236,9 @@ void bt_plugin_so_destroy_spec_data(struct bt_plugin *plugin)
                return;
        }
 
-       assert(plugin->type == BT_PLUGIN_TYPE_SO);
-       assert(spec);
-       BT_PUT(spec->shared_lib_handle);
+       BT_ASSERT(plugin->type == BT_PLUGIN_TYPE_SO);
+       BT_ASSERT(spec);
+       BT_OBJECT_PUT_REF_AND_RESET(spec->shared_lib_handle);
        g_free(plugin->spec_data);
        plugin->spec_data = NULL;
 }
@@ -287,13 +289,47 @@ enum bt_plugin_status bt_plugin_so_init(
                const struct __bt_plugin_component_class_descriptor *descriptor;
                const char *description;
                const char *help;
-               bt_component_class_init_method init_method;
-               bt_component_class_finalize_method finalize_method;
-               bt_component_class_query_method query_method;
-               bt_component_class_accept_port_connection_method accept_port_connection_method;
-               bt_component_class_port_connected_method port_connected_method;
-               bt_component_class_port_disconnected_method port_disconnected_method;
-               struct bt_component_class_iterator_methods iterator_methods;
+
+               union {
+                       struct {
+                               bt_component_class_source_init_method init;
+                               bt_component_class_source_finalize_method finalize;
+                               bt_component_class_source_query_method query;
+                               bt_component_class_source_accept_output_port_connection_method accept_output_port_connection;
+                               bt_component_class_source_output_port_connected_method output_port_connected;
+                               bt_component_class_source_message_iterator_init_method msg_iter_init;
+                               bt_component_class_source_message_iterator_finalize_method msg_iter_finalize;
+                               bt_component_class_source_message_iterator_seek_ns_from_origin_method msg_iter_seek_ns_from_origin;
+                               bt_component_class_source_message_iterator_seek_beginning_method msg_iter_seek_beginning;
+                               bt_component_class_source_message_iterator_can_seek_ns_from_origin_method msg_iter_can_seek_ns_from_origin;
+                               bt_component_class_source_message_iterator_can_seek_beginning_method msg_iter_can_seek_beginning;
+                       } source;
+
+                       struct {
+                               bt_component_class_filter_init_method init;
+                               bt_component_class_filter_finalize_method finalize;
+                               bt_component_class_filter_query_method query;
+                               bt_component_class_filter_accept_input_port_connection_method accept_input_port_connection;
+                               bt_component_class_filter_accept_output_port_connection_method accept_output_port_connection;
+                               bt_component_class_filter_input_port_connected_method input_port_connected;
+                               bt_component_class_filter_output_port_connected_method output_port_connected;
+                               bt_component_class_filter_message_iterator_init_method msg_iter_init;
+                               bt_component_class_filter_message_iterator_finalize_method msg_iter_finalize;
+                               bt_component_class_filter_message_iterator_seek_ns_from_origin_method msg_iter_seek_ns_from_origin;
+                               bt_component_class_filter_message_iterator_seek_beginning_method msg_iter_seek_beginning;
+                               bt_component_class_filter_message_iterator_can_seek_ns_from_origin_method msg_iter_can_seek_ns_from_origin;
+                               bt_component_class_filter_message_iterator_can_seek_beginning_method msg_iter_can_seek_beginning;
+                       } filter;
+
+                       struct {
+                               bt_component_class_sink_init_method init;
+                               bt_component_class_sink_finalize_method finalize;
+                               bt_component_class_sink_query_method query;
+                               bt_component_class_sink_accept_input_port_connection_method accept_input_port_connection;
+                               bt_component_class_sink_input_port_connected_method input_port_connected;
+                               bt_component_class_sink_graph_is_configured_method graph_is_configured;
+                       } sink;
+               } methods;
        };
 
        enum bt_plugin_status status = BT_PLUGIN_STATUS_OK;
@@ -336,6 +372,10 @@ enum bt_plugin_status bt_plugin_so_init(
                const struct __bt_plugin_descriptor_attribute *cur_attr =
                        *cur_attr_ptr;
 
+               if (cur_attr == NULL) {
+                       continue;
+               }
+
                if (cur_attr->plugin_descriptor != descriptor) {
                        continue;
                }
@@ -393,6 +433,10 @@ enum bt_plugin_status bt_plugin_so_init(
                        *cur_cc_descr_ptr;
                struct comp_class_full_descriptor full_descriptor = {0};
 
+               if (cur_cc_descr == NULL) {
+                       continue;
+               }
+
                if (cur_cc_descr->plugin_descriptor != descriptor) {
                        continue;
                }
@@ -410,106 +454,285 @@ enum bt_plugin_status bt_plugin_so_init(
        for (cur_cc_descr_attr_ptr = cc_descr_attrs_begin; cur_cc_descr_attr_ptr != cc_descr_attrs_end; cur_cc_descr_attr_ptr++) {
                const struct __bt_plugin_component_class_descriptor_attribute *cur_cc_descr_attr =
                        *cur_cc_descr_attr_ptr;
+               enum bt_component_class_type cc_type;
+
+               if (cur_cc_descr_attr == NULL) {
+                       continue;
+               }
 
                if (cur_cc_descr_attr->comp_class_descriptor->plugin_descriptor !=
                                descriptor) {
                        continue;
                }
 
+               cc_type = cur_cc_descr_attr->comp_class_descriptor->type;
+
                /* Find the corresponding component class descriptor entry */
                for (i = 0; i < comp_class_full_descriptors->len; i++) {
                        struct comp_class_full_descriptor *cc_full_descr =
                                &g_array_index(comp_class_full_descriptors,
                                        struct comp_class_full_descriptor, i);
 
-                       if (cur_cc_descr_attr->comp_class_descriptor ==
+                       if (cur_cc_descr_attr->comp_class_descriptor !=
                                        cc_full_descr->descriptor) {
-                               switch (cur_cc_descr_attr->type) {
-                               case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_DESCRIPTION:
-                                       cc_full_descr->description =
-                                               cur_cc_descr_attr->value.description;
+                               continue;
+                       }
+
+                       switch (cur_cc_descr_attr->type) {
+                       case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_DESCRIPTION:
+                               cc_full_descr->description =
+                                       cur_cc_descr_attr->value.description;
+                               break;
+                       case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_HELP:
+                               cc_full_descr->help =
+                                       cur_cc_descr_attr->value.help;
+                               break;
+                       case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_INIT_METHOD:
+                               switch (cc_type) {
+                               case BT_COMPONENT_CLASS_TYPE_SOURCE:
+                                       cc_full_descr->methods.source.init =
+                                               cur_cc_descr_attr->value.source_init_method;
+                                       break;
+                               case BT_COMPONENT_CLASS_TYPE_FILTER:
+                                       cc_full_descr->methods.filter.init =
+                                               cur_cc_descr_attr->value.filter_init_method;
+                                       break;
+                               case BT_COMPONENT_CLASS_TYPE_SINK:
+                                       cc_full_descr->methods.sink.init =
+                                               cur_cc_descr_attr->value.sink_init_method;
                                        break;
-                               case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_HELP:
-                                       cc_full_descr->help =
-                                               cur_cc_descr_attr->value.help;
+                               default:
+                                       abort();
+                               }
+                               break;
+                       case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_FINALIZE_METHOD:
+                               switch (cc_type) {
+                               case BT_COMPONENT_CLASS_TYPE_SOURCE:
+                                       cc_full_descr->methods.source.finalize =
+                                               cur_cc_descr_attr->value.source_finalize_method;
+                                       break;
+                               case BT_COMPONENT_CLASS_TYPE_FILTER:
+                                       cc_full_descr->methods.filter.finalize =
+                                               cur_cc_descr_attr->value.filter_finalize_method;
+                                       break;
+                               case BT_COMPONENT_CLASS_TYPE_SINK:
+                                       cc_full_descr->methods.sink.finalize =
+                                               cur_cc_descr_attr->value.sink_finalize_method;
+                                       break;
+                               default:
+                                       abort();
+                               }
+                               break;
+                       case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_QUERY_METHOD:
+                               switch (cc_type) {
+                               case BT_COMPONENT_CLASS_TYPE_SOURCE:
+                                       cc_full_descr->methods.source.query =
+                                               cur_cc_descr_attr->value.source_query_method;
+                                       break;
+                               case BT_COMPONENT_CLASS_TYPE_FILTER:
+                                       cc_full_descr->methods.filter.query =
+                                               cur_cc_descr_attr->value.filter_query_method;
+                                       break;
+                               case BT_COMPONENT_CLASS_TYPE_SINK:
+                                       cc_full_descr->methods.sink.query =
+                                               cur_cc_descr_attr->value.sink_query_method;
+                                       break;
+                               default:
+                                       abort();
+                               }
+                               break;
+                       case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_ACCEPT_INPUT_PORT_CONNECTION_METHOD:
+                               switch (cc_type) {
+                               case BT_COMPONENT_CLASS_TYPE_FILTER:
+                                       cc_full_descr->methods.filter.accept_input_port_connection =
+                                               cur_cc_descr_attr->value.filter_accept_input_port_connection_method;
+                                       break;
+                               case BT_COMPONENT_CLASS_TYPE_SINK:
+                                       cc_full_descr->methods.sink.accept_input_port_connection =
+                                               cur_cc_descr_attr->value.sink_accept_input_port_connection_method;
+                                       break;
+                               default:
+                                       abort();
+                               }
+                               break;
+                       case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_ACCEPT_OUTPUT_PORT_CONNECTION_METHOD:
+                               switch (cc_type) {
+                               case BT_COMPONENT_CLASS_TYPE_SOURCE:
+                                       cc_full_descr->methods.source.accept_output_port_connection =
+                                               cur_cc_descr_attr->value.source_accept_output_port_connection_method;
                                        break;
-                               case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_INIT_METHOD:
-                                       cc_full_descr->init_method =
-                                               cur_cc_descr_attr->value.init_method;
+                               case BT_COMPONENT_CLASS_TYPE_FILTER:
+                                       cc_full_descr->methods.filter.accept_output_port_connection =
+                                               cur_cc_descr_attr->value.filter_accept_output_port_connection_method;
                                        break;
-                               case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_FINALIZE_METHOD:
-                                       cc_full_descr->finalize_method =
-                                               cur_cc_descr_attr->value.finalize_method;
+                               default:
+                                       abort();
+                               }
+                               break;
+                       case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_INPUT_PORT_CONNECTED_METHOD:
+                               switch (cc_type) {
+                               case BT_COMPONENT_CLASS_TYPE_FILTER:
+                                       cc_full_descr->methods.filter.input_port_connected =
+                                               cur_cc_descr_attr->value.filter_input_port_connected_method;
                                        break;
-                               case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_QUERY_METHOD:
-                                       cc_full_descr->query_method =
-                                               cur_cc_descr_attr->value.query_method;
+                               case BT_COMPONENT_CLASS_TYPE_SINK:
+                                       cc_full_descr->methods.sink.input_port_connected =
+                                               cur_cc_descr_attr->value.sink_input_port_connected_method;
+                                       break;
+                               default:
+                                       abort();
+                               }
+                               break;
+                       case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_OUTPUT_PORT_CONNECTED_METHOD:
+                               switch (cc_type) {
+                               case BT_COMPONENT_CLASS_TYPE_SOURCE:
+                                       cc_full_descr->methods.source.output_port_connected =
+                                               cur_cc_descr_attr->value.source_output_port_connected_method;
                                        break;
-                               case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_ACCEPT_PORT_CONNECTION_METHOD:
-                                       cc_full_descr->accept_port_connection_method =
-                                               cur_cc_descr_attr->value.accept_port_connection_method;
+                               case BT_COMPONENT_CLASS_TYPE_FILTER:
+                                       cc_full_descr->methods.filter.output_port_connected =
+                                               cur_cc_descr_attr->value.filter_output_port_connected_method;
                                        break;
-                               case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_PORT_CONNECTED_METHOD:
-                                       cc_full_descr->port_connected_method =
-                                               cur_cc_descr_attr->value.port_connected_method;
+                               default:
+                                       abort();
+                               }
+                               break;
+                       case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_GRAPH_IS_CONFIGURED_METHOD:
+                               switch (cc_type) {
+                               case BT_COMPONENT_CLASS_TYPE_SINK:
+                                       cc_full_descr->methods.sink.graph_is_configured =
+                                               cur_cc_descr_attr->value.sink_graph_is_configured_method;
                                        break;
-                               case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_PORT_DISCONNECTED_METHOD:
-                                       cc_full_descr->port_disconnected_method =
-                                               cur_cc_descr_attr->value.port_disconnected_method;
+                               default:
+                                       abort();
+                               }
+                               break;
+                       case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_MSG_ITER_INIT_METHOD:
+                               switch (cc_type) {
+                               case BT_COMPONENT_CLASS_TYPE_SOURCE:
+                                       cc_full_descr->methods.source.msg_iter_init =
+                                               cur_cc_descr_attr->value.source_msg_iter_init_method;
                                        break;
-                               case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_NOTIF_ITER_INIT_METHOD:
-                                       cc_full_descr->iterator_methods.init =
-                                               cur_cc_descr_attr->value.notif_iter_init_method;
+                               case BT_COMPONENT_CLASS_TYPE_FILTER:
+                                       cc_full_descr->methods.filter.msg_iter_init =
+                                               cur_cc_descr_attr->value.filter_msg_iter_init_method;
                                        break;
-                               case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_NOTIF_ITER_FINALIZE_METHOD:
-                                       cc_full_descr->iterator_methods.finalize =
-                                               cur_cc_descr_attr->value.notif_iter_finalize_method;
+                               default:
+                                       abort();
+                               }
+                               break;
+                       case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_MSG_ITER_FINALIZE_METHOD:
+                               switch (cc_type) {
+                               case BT_COMPONENT_CLASS_TYPE_SOURCE:
+                                       cc_full_descr->methods.source.msg_iter_finalize =
+                                               cur_cc_descr_attr->value.source_msg_iter_finalize_method;
                                        break;
-                               case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_NOTIF_ITER_SEEK_TIME_METHOD:
-                                       cc_full_descr->iterator_methods.seek_time =
-                                               cur_cc_descr_attr->value.notif_iter_seek_time_method;
+                               case BT_COMPONENT_CLASS_TYPE_FILTER:
+                                       cc_full_descr->methods.filter.msg_iter_finalize =
+                                               cur_cc_descr_attr->value.filter_msg_iter_finalize_method;
                                        break;
                                default:
-                                       /*
-                                        * WARN-level logging because
-                                        * this should not happen with
-                                        * the appropriate ABI version.
-                                        * If we're here, we know that
-                                        * for the reported version of
-                                        * the ABI, this attribute is
-                                        * unknown.
-                                        */
-                                       BT_LOGW("Ignoring unknown component class descriptor attribute: "
-                                               "plugin-path=\"%s\", "
-                                               "plugin-name=\"%s\", "
-                                               "comp-class-name=\"%s\", "
-                                               "comp-class-type=%s, "
-                                               "attr-type-name=\"%s\", "
-                                               "attr-type-id=%d",
-                                               spec->shared_lib_handle->path ?
-                                                       spec->shared_lib_handle->path->str :
-                                                       NULL,
-                                               descriptor->name,
-                                               cur_cc_descr_attr->comp_class_descriptor->name,
-                                               bt_component_class_type_string(
-                                                       cur_cc_descr_attr->comp_class_descriptor->type),
-                                               cur_cc_descr_attr->type_name,
-                                               cur_cc_descr_attr->type);
+                                       abort();
+                               }
+                               break;
+                       case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_MSG_ITER_SEEK_NS_FROM_ORIGIN_METHOD:
+                               switch (cc_type) {
+                               case BT_COMPONENT_CLASS_TYPE_SOURCE:
+                                       cc_full_descr->methods.source.msg_iter_seek_ns_from_origin =
+                                               cur_cc_descr_attr->value.source_msg_iter_seek_ns_from_origin_method;
                                        break;
+                               case BT_COMPONENT_CLASS_TYPE_FILTER:
+                                       cc_full_descr->methods.filter.msg_iter_seek_ns_from_origin =
+                                               cur_cc_descr_attr->value.filter_msg_iter_seek_ns_from_origin_method;
+                                       break;
+                               default:
+                                       abort();
                                }
+                               break;
+                       case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_MSG_ITER_SEEK_BEGINNING_METHOD:
+                               switch (cc_type) {
+                               case BT_COMPONENT_CLASS_TYPE_SOURCE:
+                                       cc_full_descr->methods.source.msg_iter_seek_beginning =
+                                               cur_cc_descr_attr->value.source_msg_iter_seek_beginning_method;
+                                       break;
+                               case BT_COMPONENT_CLASS_TYPE_FILTER:
+                                       cc_full_descr->methods.filter.msg_iter_seek_beginning =
+                                               cur_cc_descr_attr->value.filter_msg_iter_seek_beginning_method;
+                                       break;
+                               default:
+                                       abort();
+                               }
+                               break;
+                       case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_MSG_ITER_CAN_SEEK_NS_FROM_ORIGIN_METHOD:
+                               switch (cc_type) {
+                               case BT_COMPONENT_CLASS_TYPE_SOURCE:
+                                       cc_full_descr->methods.source.msg_iter_can_seek_ns_from_origin =
+                                               cur_cc_descr_attr->value.source_msg_iter_can_seek_ns_from_origin_method;
+                                       break;
+                               case BT_COMPONENT_CLASS_TYPE_FILTER:
+                                       cc_full_descr->methods.filter.msg_iter_can_seek_ns_from_origin =
+                                               cur_cc_descr_attr->value.filter_msg_iter_can_seek_ns_from_origin_method;
+                                       break;
+                               default:
+                                       abort();
+                               }
+                               break;
+                       case BT_PLUGIN_COMPONENT_CLASS_DESCRIPTOR_ATTRIBUTE_TYPE_MSG_ITER_CAN_SEEK_BEGINNING_METHOD:
+                               switch (cc_type) {
+                               case BT_COMPONENT_CLASS_TYPE_SOURCE:
+                                       cc_full_descr->methods.source.msg_iter_can_seek_beginning =
+                                               cur_cc_descr_attr->value.source_msg_iter_can_seek_beginning_method;
+                                       break;
+                               case BT_COMPONENT_CLASS_TYPE_FILTER:
+                                       cc_full_descr->methods.filter.msg_iter_can_seek_beginning =
+                                               cur_cc_descr_attr->value.filter_msg_iter_can_seek_beginning_method;
+                                       break;
+                               default:
+                                       abort();
+                               }
+                               break;
+                       default:
+                               /*
+                                * WARN-level logging because this
+                                * should not happen with the
+                                * appropriate ABI version. If we're
+                                * here, we know that for the reported
+                                * version of the ABI, this attribute is
+                                * unknown.
+                                */
+                               BT_LOGW("Ignoring unknown component class descriptor attribute: "
+                                       "plugin-path=\"%s\", "
+                                       "plugin-name=\"%s\", "
+                                       "comp-class-name=\"%s\", "
+                                       "comp-class-type=%s, "
+                                       "attr-type-name=\"%s\", "
+                                       "attr-type-id=%d",
+                                       spec->shared_lib_handle->path ?
+                                               spec->shared_lib_handle->path->str :
+                                               NULL,
+                                       descriptor->name,
+                                       cur_cc_descr_attr->comp_class_descriptor->name,
+                                       bt_component_class_type_string(
+                                               cur_cc_descr_attr->comp_class_descriptor->type),
+                                       cur_cc_descr_attr->type_name,
+                                       cur_cc_descr_attr->type);
+                               break;
                        }
                }
        }
 
        /* Initialize plugin */
        if (spec->init) {
+               enum bt_self_plugin_status init_status;
+
                BT_LOGD_STR("Calling user's plugin initialization function.");
-               status = spec->init(plugin);
+               init_status = spec->init((void *) plugin);
                BT_LOGD("User function returned: %s",
-                       bt_plugin_status_string(status));
+                       bt_self_plugin_status_string(init_status));
 
-               if (status < 0) {
+               if (init_status < 0) {
                        BT_LOGW_STR("User's plugin initialization function failed.");
+                       status = BT_PLUGIN_STATUS_ERROR;
                        goto end;
                }
        }
@@ -521,7 +744,10 @@ enum bt_plugin_status bt_plugin_so_init(
                struct comp_class_full_descriptor *cc_full_descr =
                        &g_array_index(comp_class_full_descriptors,
                                struct comp_class_full_descriptor, i);
-               struct bt_component_class *comp_class;
+               struct bt_component_class *comp_class = NULL;
+               struct bt_component_class_source *src_comp_class = NULL;
+               struct bt_component_class_filter *flt_comp_class = NULL;
+               struct bt_component_class_sink *sink_comp_class = NULL;
 
                BT_LOGD("Creating and setting properties of plugin's component class: "
                        "plugin-path=\"%s\", plugin-name=\"%s\", "
@@ -536,19 +762,25 @@ enum bt_plugin_status bt_plugin_so_init(
 
                switch (cc_full_descr->descriptor->type) {
                case BT_COMPONENT_CLASS_TYPE_SOURCE:
-                       comp_class = bt_component_class_source_create(
+                       src_comp_class = bt_component_class_source_create(
                                cc_full_descr->descriptor->name,
-                               cc_full_descr->descriptor->methods.source.notif_iter_next);
+                               cc_full_descr->descriptor->methods.source.msg_iter_next);
+                       comp_class = bt_component_class_source_as_component_class(
+                               src_comp_class);
                        break;
                case BT_COMPONENT_CLASS_TYPE_FILTER:
-                       comp_class = bt_component_class_filter_create(
+                       flt_comp_class = bt_component_class_filter_create(
                                cc_full_descr->descriptor->name,
-                               cc_full_descr->descriptor->methods.source.notif_iter_next);
+                               cc_full_descr->descriptor->methods.source.msg_iter_next);
+                       comp_class = bt_component_class_filter_as_component_class(
+                               flt_comp_class);
                        break;
                case BT_COMPONENT_CLASS_TYPE_SINK:
-                       comp_class = bt_component_class_sink_create(
+                       sink_comp_class = bt_component_class_sink_create(
                                cc_full_descr->descriptor->name,
                                cc_full_descr->descriptor->methods.sink.consume);
+                       comp_class = bt_component_class_sink_as_component_class(
+                               sink_comp_class);
                        break;
                default:
                        /*
@@ -577,12 +809,12 @@ enum bt_plugin_status bt_plugin_so_init(
                }
 
                if (cc_full_descr->description) {
-                       ret = bt_component_class_set_description(comp_class,
-                               cc_full_descr->description);
+                       ret = bt_component_class_set_description(
+                               comp_class, cc_full_descr->description);
                        if (ret) {
                                BT_LOGE_STR("Cannot set component class's description.");
                                status = BT_PLUGIN_STATUS_ERROR;
-                               BT_PUT(comp_class);
+                               BT_OBJECT_PUT_REF_AND_RESET(comp_class);
                                goto end;
                        }
                }
@@ -593,153 +825,377 @@ enum bt_plugin_status bt_plugin_so_init(
                        if (ret) {
                                BT_LOGE_STR("Cannot set component class's help string.");
                                status = BT_PLUGIN_STATUS_ERROR;
-                               BT_PUT(comp_class);
+                               BT_OBJECT_PUT_REF_AND_RESET(comp_class);
                                goto end;
                        }
                }
 
-               if (cc_full_descr->init_method) {
-                       ret = bt_component_class_set_init_method(comp_class,
-                               cc_full_descr->init_method);
-                       if (ret) {
-                               BT_LOGE_STR("Cannot set component class's initialization method.");
-                               status = BT_PLUGIN_STATUS_ERROR;
-                               BT_PUT(comp_class);
-                               goto end;
+               switch (cc_full_descr->descriptor->type) {
+               case BT_COMPONENT_CLASS_TYPE_SOURCE:
+                       if (cc_full_descr->methods.source.init) {
+                               ret = bt_component_class_source_set_init_method(
+                                       src_comp_class,
+                                       cc_full_descr->methods.source.init);
+                               if (ret) {
+                                       BT_LOGE_STR("Cannot set source component class's initialization method.");
+                                       status = BT_PLUGIN_STATUS_ERROR;
+                                       BT_OBJECT_PUT_REF_AND_RESET(src_comp_class);
+                                       goto end;
+                               }
                        }
-               }
 
-               if (cc_full_descr->finalize_method) {
-                       ret = bt_component_class_set_finalize_method(comp_class,
-                               cc_full_descr->finalize_method);
-                       if (ret) {
-                               BT_LOGE_STR("Cannot set component class's finalization method.");
-                               status = BT_PLUGIN_STATUS_ERROR;
-                               BT_PUT(comp_class);
-                               goto end;
+                       if (cc_full_descr->methods.source.finalize) {
+                               ret = bt_component_class_source_set_finalize_method(
+                                       src_comp_class,
+                                       cc_full_descr->methods.source.finalize);
+                               if (ret) {
+                                       BT_LOGE_STR("Cannot set source component class's finalization method.");
+                                       status = BT_PLUGIN_STATUS_ERROR;
+                                       BT_OBJECT_PUT_REF_AND_RESET(src_comp_class);
+                                       goto end;
+                               }
                        }
-               }
 
-               if (cc_full_descr->query_method) {
-                       ret = bt_component_class_set_query_method(
-                               comp_class, cc_full_descr->query_method);
-                       if (ret) {
-                               BT_LOGE_STR("Cannot set component class's query method.");
-                               status = BT_PLUGIN_STATUS_ERROR;
-                               BT_PUT(comp_class);
-                               goto end;
+                       if (cc_full_descr->methods.source.query) {
+                               ret = bt_component_class_source_set_query_method(
+                                       src_comp_class,
+                                       cc_full_descr->methods.source.query);
+                               if (ret) {
+                                       BT_LOGE_STR("Cannot set source component class's query method.");
+                                       status = BT_PLUGIN_STATUS_ERROR;
+                                       BT_OBJECT_PUT_REF_AND_RESET(src_comp_class);
+                                       goto end;
+                               }
                        }
-               }
 
-               if (cc_full_descr->accept_port_connection_method) {
-                       ret = bt_component_class_set_accept_port_connection_method(
-                               comp_class, cc_full_descr->accept_port_connection_method);
-                       if (ret) {
-                               BT_LOGE_STR("Cannot set component class's \"accept port connection\" method.");
-                               status = BT_PLUGIN_STATUS_ERROR;
-                               BT_PUT(comp_class);
-                               goto end;
+                       if (cc_full_descr->methods.source.accept_output_port_connection) {
+                               ret = bt_component_class_source_set_accept_output_port_connection_method(
+                                       src_comp_class,
+                                       cc_full_descr->methods.source.accept_output_port_connection);
+                               if (ret) {
+                                       BT_LOGE_STR("Cannot set source component class's \"accept input output connection\" method.");
+                                       status = BT_PLUGIN_STATUS_ERROR;
+                                       BT_OBJECT_PUT_REF_AND_RESET(src_comp_class);
+                                       goto end;
+                               }
                        }
-               }
 
-               if (cc_full_descr->port_connected_method) {
-                       ret = bt_component_class_set_port_connected_method(
-                               comp_class, cc_full_descr->port_connected_method);
-                       if (ret) {
-                               BT_LOGE_STR("Cannot set component class's \"port connected\" method.");
-                               status = BT_PLUGIN_STATUS_ERROR;
-                               BT_PUT(comp_class);
-                               goto end;
+                       if (cc_full_descr->methods.source.output_port_connected) {
+                               ret = bt_component_class_source_set_output_port_connected_method(
+                                       src_comp_class,
+                                       cc_full_descr->methods.source.output_port_connected);
+                               if (ret) {
+                                       BT_LOGE_STR("Cannot set source component class's \"output port connected\" method.");
+                                       status = BT_PLUGIN_STATUS_ERROR;
+                                       BT_OBJECT_PUT_REF_AND_RESET(src_comp_class);
+                                       goto end;
+                               }
                        }
-               }
 
-               if (cc_full_descr->port_disconnected_method) {
-                       ret = bt_component_class_set_port_disconnected_method(
-                               comp_class, cc_full_descr->port_disconnected_method);
-                       if (ret) {
-                               BT_LOGE_STR("Cannot set component class's \"port disconnected\" method.");
-                               status = BT_PLUGIN_STATUS_ERROR;
-                               BT_PUT(comp_class);
-                               goto end;
+                       if (cc_full_descr->methods.source.msg_iter_init) {
+                               ret = bt_component_class_source_set_message_iterator_init_method(
+                                       src_comp_class,
+                                       cc_full_descr->methods.source.msg_iter_init);
+                               if (ret) {
+                                       BT_LOGE_STR("Cannot set source component class's message iterator initialization method.");
+                                       status = BT_PLUGIN_STATUS_ERROR;
+                                       BT_OBJECT_PUT_REF_AND_RESET(src_comp_class);
+                                       goto end;
+                               }
                        }
-               }
 
-               switch (cc_full_descr->descriptor->type) {
-               case BT_COMPONENT_CLASS_TYPE_SOURCE:
-                       if (cc_full_descr->iterator_methods.init) {
-                               ret = bt_component_class_source_set_notification_iterator_init_method(
-                                       comp_class,
-                                       cc_full_descr->iterator_methods.init);
+                       if (cc_full_descr->methods.source.msg_iter_finalize) {
+                               ret = bt_component_class_source_set_message_iterator_finalize_method(
+                                       src_comp_class,
+                                       cc_full_descr->methods.source.msg_iter_finalize);
+                               if (ret) {
+                                       BT_LOGE_STR("Cannot set source component class's message iterator finalization method.");
+                                       status = BT_PLUGIN_STATUS_ERROR;
+                                       BT_OBJECT_PUT_REF_AND_RESET(src_comp_class);
+                                       goto end;
+                               }
+                       }
+
+                       if (cc_full_descr->methods.source.msg_iter_seek_ns_from_origin) {
+                               ret = bt_component_class_source_set_message_iterator_seek_ns_from_origin_method(
+                                       src_comp_class,
+                                       cc_full_descr->methods.source.msg_iter_seek_ns_from_origin);
                                if (ret) {
-                                       BT_LOGE_STR("Cannot set component class's notification iterator initialization method.");
+                                       BT_LOGE_STR("Cannot set source component class's message iterator \"seek nanoseconds from origin\" method.");
                                        status = BT_PLUGIN_STATUS_ERROR;
-                                       BT_PUT(comp_class);
+                                       BT_OBJECT_PUT_REF_AND_RESET(src_comp_class);
                                        goto end;
                                }
                        }
 
-                       if (cc_full_descr->iterator_methods.finalize) {
-                               ret = bt_component_class_source_set_notification_iterator_finalize_method(
-                                       comp_class,
-                                       cc_full_descr->iterator_methods.finalize);
+                       if (cc_full_descr->methods.source.msg_iter_seek_beginning) {
+                               ret = bt_component_class_source_set_message_iterator_seek_beginning_method(
+                                       src_comp_class,
+                                       cc_full_descr->methods.source.msg_iter_seek_beginning);
                                if (ret) {
-                                       BT_LOGE_STR("Cannot set source component class's notification iterator finalization method.");
+                                       BT_LOGE_STR("Cannot set source component class's message iterator \"seek beginning\" method.");
                                        status = BT_PLUGIN_STATUS_ERROR;
-                                       BT_PUT(comp_class);
+                                       BT_OBJECT_PUT_REF_AND_RESET(src_comp_class);
                                        goto end;
                                }
                        }
 
-                       if (cc_full_descr->iterator_methods.seek_time) {
-                               ret = bt_component_class_source_set_notification_iterator_seek_time_method(
-                                       comp_class,
-                                       cc_full_descr->iterator_methods.seek_time);
+                       if (cc_full_descr->methods.source.msg_iter_can_seek_ns_from_origin) {
+                               ret = bt_component_class_source_set_message_iterator_can_seek_ns_from_origin_method(
+                                       src_comp_class,
+                                       cc_full_descr->methods.source.msg_iter_can_seek_ns_from_origin);
                                if (ret) {
-                                       BT_LOGE_STR("Cannot set source component class's notification iterator seek to time method.");
+                                       BT_LOGE_STR("Cannot set source component class's message iterator \"can seek nanoseconds from origin\" method.");
                                        status = BT_PLUGIN_STATUS_ERROR;
-                                       BT_PUT(comp_class);
+                                       BT_OBJECT_PUT_REF_AND_RESET(src_comp_class);
                                        goto end;
                                }
                        }
+
+                       if (cc_full_descr->methods.source.msg_iter_can_seek_beginning) {
+                               ret = bt_component_class_source_set_message_iterator_can_seek_beginning_method(
+                                       src_comp_class,
+                                       cc_full_descr->methods.source.msg_iter_can_seek_beginning);
+                               if (ret) {
+                                       BT_LOGE_STR("Cannot set source component class's message iterator \"can seek beginning\" method.");
+                                       status = BT_PLUGIN_STATUS_ERROR;
+                                       BT_OBJECT_PUT_REF_AND_RESET(src_comp_class);
+                                       goto end;
+                               }
+                       }
+
                        break;
                case BT_COMPONENT_CLASS_TYPE_FILTER:
-                       if (cc_full_descr->iterator_methods.init) {
-                               ret = bt_component_class_filter_set_notification_iterator_init_method(
-                                       comp_class,
-                                       cc_full_descr->iterator_methods.init);
+                       if (cc_full_descr->methods.filter.init) {
+                               ret = bt_component_class_filter_set_init_method(
+                                       flt_comp_class,
+                                       cc_full_descr->methods.filter.init);
+                               if (ret) {
+                                       BT_LOGE_STR("Cannot set filter component class's initialization method.");
+                                       status = BT_PLUGIN_STATUS_ERROR;
+                                       BT_OBJECT_PUT_REF_AND_RESET(flt_comp_class);
+                                       goto end;
+                               }
+                       }
+
+                       if (cc_full_descr->methods.filter.finalize) {
+                               ret = bt_component_class_filter_set_finalize_method(
+                                       flt_comp_class,
+                                       cc_full_descr->methods.filter.finalize);
+                               if (ret) {
+                                       BT_LOGE_STR("Cannot set filter component class's finalization method.");
+                                       status = BT_PLUGIN_STATUS_ERROR;
+                                       BT_OBJECT_PUT_REF_AND_RESET(flt_comp_class);
+                                       goto end;
+                               }
+                       }
+
+                       if (cc_full_descr->methods.filter.query) {
+                               ret = bt_component_class_filter_set_query_method(
+                                       flt_comp_class,
+                                       cc_full_descr->methods.filter.query);
+                               if (ret) {
+                                       BT_LOGE_STR("Cannot set filter component class's query method.");
+                                       status = BT_PLUGIN_STATUS_ERROR;
+                                       BT_OBJECT_PUT_REF_AND_RESET(flt_comp_class);
+                                       goto end;
+                               }
+                       }
+
+                       if (cc_full_descr->methods.filter.accept_input_port_connection) {
+                               ret = bt_component_class_filter_set_accept_input_port_connection_method(
+                                       flt_comp_class,
+                                       cc_full_descr->methods.filter.accept_input_port_connection);
+                               if (ret) {
+                                       BT_LOGE_STR("Cannot set filter component class's \"accept input port connection\" method.");
+                                       status = BT_PLUGIN_STATUS_ERROR;
+                                       BT_OBJECT_PUT_REF_AND_RESET(flt_comp_class);
+                                       goto end;
+                               }
+                       }
+
+                       if (cc_full_descr->methods.filter.accept_output_port_connection) {
+                               ret = bt_component_class_filter_set_accept_output_port_connection_method(
+                                       flt_comp_class,
+                                       cc_full_descr->methods.filter.accept_output_port_connection);
+                               if (ret) {
+                                       BT_LOGE_STR("Cannot set filter component class's \"accept input output connection\" method.");
+                                       status = BT_PLUGIN_STATUS_ERROR;
+                                       BT_OBJECT_PUT_REF_AND_RESET(flt_comp_class);
+                                       goto end;
+                               }
+                       }
+
+                       if (cc_full_descr->methods.filter.input_port_connected) {
+                               ret = bt_component_class_filter_set_input_port_connected_method(
+                                       flt_comp_class,
+                                       cc_full_descr->methods.filter.input_port_connected);
+                               if (ret) {
+                                       BT_LOGE_STR("Cannot set filter component class's \"input port connected\" method.");
+                                       status = BT_PLUGIN_STATUS_ERROR;
+                                       BT_OBJECT_PUT_REF_AND_RESET(flt_comp_class);
+                                       goto end;
+                               }
+                       }
+
+                       if (cc_full_descr->methods.filter.output_port_connected) {
+                               ret = bt_component_class_filter_set_output_port_connected_method(
+                                       flt_comp_class,
+                                       cc_full_descr->methods.filter.output_port_connected);
+                               if (ret) {
+                                       BT_LOGE_STR("Cannot set filter component class's \"output port connected\" method.");
+                                       status = BT_PLUGIN_STATUS_ERROR;
+                                       BT_OBJECT_PUT_REF_AND_RESET(flt_comp_class);
+                                       goto end;
+                               }
+                       }
+
+                       if (cc_full_descr->methods.filter.msg_iter_init) {
+                               ret = bt_component_class_filter_set_message_iterator_init_method(
+                                       flt_comp_class,
+                                       cc_full_descr->methods.filter.msg_iter_init);
+                               if (ret) {
+                                       BT_LOGE_STR("Cannot set filter component class's message iterator initialization method.");
+                                       status = BT_PLUGIN_STATUS_ERROR;
+                                       BT_OBJECT_PUT_REF_AND_RESET(flt_comp_class);
+                                       goto end;
+                               }
+                       }
+
+                       if (cc_full_descr->methods.filter.msg_iter_finalize) {
+                               ret = bt_component_class_filter_set_message_iterator_finalize_method(
+                                       flt_comp_class,
+                                       cc_full_descr->methods.filter.msg_iter_finalize);
                                if (ret) {
-                                       BT_LOGE_STR("Cannot set filter component class's notification iterator initialization method.");
+                                       BT_LOGE_STR("Cannot set filter component class's message iterator finalization method.");
                                        status = BT_PLUGIN_STATUS_ERROR;
-                                       BT_PUT(comp_class);
+                                       BT_OBJECT_PUT_REF_AND_RESET(flt_comp_class);
                                        goto end;
                                }
                        }
 
-                       if (cc_full_descr->iterator_methods.finalize) {
-                               ret = bt_component_class_filter_set_notification_iterator_finalize_method(
-                                       comp_class,
-                                       cc_full_descr->iterator_methods.finalize);
+                       if (cc_full_descr->methods.filter.msg_iter_seek_ns_from_origin) {
+                               ret = bt_component_class_filter_set_message_iterator_seek_ns_from_origin_method(
+                                       flt_comp_class,
+                                       cc_full_descr->methods.filter.msg_iter_seek_ns_from_origin);
                                if (ret) {
-                                       BT_LOGE_STR("Cannot set filter component class's notification iterator finalization method.");
+                                       BT_LOGE_STR("Cannot set filter component class's message iterator \"seek nanoseconds from origin\" method.");
                                        status = BT_PLUGIN_STATUS_ERROR;
-                                       BT_PUT(comp_class);
+                                       BT_OBJECT_PUT_REF_AND_RESET(flt_comp_class);
                                        goto end;
                                }
                        }
 
-                       if (cc_full_descr->iterator_methods.seek_time) {
-                               ret = bt_component_class_filter_set_notification_iterator_seek_time_method(
-                                       comp_class,
-                                       cc_full_descr->iterator_methods.seek_time);
+                       if (cc_full_descr->methods.filter.msg_iter_seek_beginning) {
+                               ret = bt_component_class_filter_set_message_iterator_seek_beginning_method(
+                                       flt_comp_class,
+                                       cc_full_descr->methods.filter.msg_iter_seek_beginning);
                                if (ret) {
-                                       BT_LOGE_STR("Cannot set filter component class's notification iterator seek to time method.");
+                                       BT_LOGE_STR("Cannot set filter component class's message iterator \"seek beginning\" method.");
                                        status = BT_PLUGIN_STATUS_ERROR;
-                                       BT_PUT(comp_class);
+                                       BT_OBJECT_PUT_REF_AND_RESET(flt_comp_class);
                                        goto end;
                                }
                        }
+
+                       if (cc_full_descr->methods.filter.msg_iter_can_seek_ns_from_origin) {
+                               ret = bt_component_class_filter_set_message_iterator_can_seek_ns_from_origin_method(
+                                       flt_comp_class,
+                                       cc_full_descr->methods.filter.msg_iter_can_seek_ns_from_origin);
+                               if (ret) {
+                                       BT_LOGE_STR("Cannot set filter component class's message iterator \"can seek nanoseconds from origin\" method.");
+                                       status = BT_PLUGIN_STATUS_ERROR;
+                                       BT_OBJECT_PUT_REF_AND_RESET(flt_comp_class);
+                                       goto end;
+                               }
+                       }
+
+                       if (cc_full_descr->methods.filter.msg_iter_can_seek_beginning) {
+                               ret = bt_component_class_filter_set_message_iterator_can_seek_beginning_method(
+                                       flt_comp_class,
+                                       cc_full_descr->methods.filter.msg_iter_can_seek_beginning);
+                               if (ret) {
+                                       BT_LOGE_STR("Cannot set filter component class's message iterator \"can seek beginning\" method.");
+                                       status = BT_PLUGIN_STATUS_ERROR;
+                                       BT_OBJECT_PUT_REF_AND_RESET(flt_comp_class);
+                                       goto end;
+                               }
+                       }
+
                        break;
                case BT_COMPONENT_CLASS_TYPE_SINK:
+                       if (cc_full_descr->methods.sink.init) {
+                               ret = bt_component_class_sink_set_init_method(
+                                       sink_comp_class,
+                                       cc_full_descr->methods.sink.init);
+                               if (ret) {
+                                       BT_LOGE_STR("Cannot set sink component class's initialization method.");
+                                       status = BT_PLUGIN_STATUS_ERROR;
+                                       BT_OBJECT_PUT_REF_AND_RESET(sink_comp_class);
+                                       goto end;
+                               }
+                       }
+
+                       if (cc_full_descr->methods.sink.finalize) {
+                               ret = bt_component_class_sink_set_finalize_method(
+                                       sink_comp_class,
+                                       cc_full_descr->methods.sink.finalize);
+                               if (ret) {
+                                       BT_LOGE_STR("Cannot set sink component class's finalization method.");
+                                       status = BT_PLUGIN_STATUS_ERROR;
+                                       BT_OBJECT_PUT_REF_AND_RESET(sink_comp_class);
+                                       goto end;
+                               }
+                       }
+
+                       if (cc_full_descr->methods.sink.query) {
+                               ret = bt_component_class_sink_set_query_method(
+                                       sink_comp_class,
+                                       cc_full_descr->methods.sink.query);
+                               if (ret) {
+                                       BT_LOGE_STR("Cannot set sink component class's query method.");
+                                       status = BT_PLUGIN_STATUS_ERROR;
+                                       BT_OBJECT_PUT_REF_AND_RESET(sink_comp_class);
+                                       goto end;
+                               }
+                       }
+
+                       if (cc_full_descr->methods.sink.accept_input_port_connection) {
+                               ret = bt_component_class_sink_set_accept_input_port_connection_method(
+                                       sink_comp_class,
+                                       cc_full_descr->methods.sink.accept_input_port_connection);
+                               if (ret) {
+                                       BT_LOGE_STR("Cannot set sink component class's \"accept input port connection\" method.");
+                                       status = BT_PLUGIN_STATUS_ERROR;
+                                       BT_OBJECT_PUT_REF_AND_RESET(sink_comp_class);
+                                       goto end;
+                               }
+                       }
+
+                       if (cc_full_descr->methods.sink.input_port_connected) {
+                               ret = bt_component_class_sink_set_input_port_connected_method(
+                                       sink_comp_class,
+                                       cc_full_descr->methods.sink.input_port_connected);
+                               if (ret) {
+                                       BT_LOGE_STR("Cannot set sink component class's \"input port connected\" method.");
+                                       status = BT_PLUGIN_STATUS_ERROR;
+                                       BT_OBJECT_PUT_REF_AND_RESET(sink_comp_class);
+                                       goto end;
+                               }
+                       }
+
+                       if (cc_full_descr->methods.sink.graph_is_configured) {
+                               ret = bt_component_class_sink_set_graph_is_configured_method(
+                                       sink_comp_class,
+                                       cc_full_descr->methods.sink.graph_is_configured);
+                               if (ret) {
+                                       BT_LOGE_STR("Cannot set sink component class's \"graph is configured\" method.");
+                                       status = BT_PLUGIN_STATUS_ERROR;
+                                       BT_OBJECT_PUT_REF_AND_RESET(sink_comp_class);
+                                       goto end;
+                               }
+                       }
+
                        break;
                default:
                        abort();
@@ -750,26 +1206,18 @@ enum bt_plugin_status bt_plugin_so_init(
                 *
                 * This will call back
                 * bt_plugin_so_on_add_component_class() so that we can
-                * add a mapping in the component class list when
-                * we know the component class is successfully added.
+                * add a mapping in the component class list when we
+                * know the component class is successfully added.
                 */
                status = bt_plugin_add_component_class(plugin,
-                       comp_class);
-               BT_PUT(comp_class);
+                       (void *) comp_class);
+               BT_OBJECT_PUT_REF_AND_RESET(comp_class);
                if (status < 0) {
                        BT_LOGE("Cannot add component class to plugin.");
                        goto end;
                }
        }
 
-       /*
-        * All the plugin's component classes should be added at this
-        * point. We freeze the plugin so that it's not possible to add
-        * component classes to this plugin object after this stage
-        * (plugin object becomes immutable).
-        */
-       bt_plugin_freeze(plugin);
-
 end:
        g_array_free(comp_class_full_descriptors, TRUE);
        return status;
@@ -795,16 +1243,34 @@ struct bt_plugin *bt_plugin_so_create_empty(
        }
 
        spec = plugin->spec_data;
-       spec->shared_lib_handle = bt_get(shared_lib_handle);
+       spec->shared_lib_handle = shared_lib_handle;
+       bt_object_get_no_null_check(spec->shared_lib_handle);
        goto end;
 
 error:
-       BT_PUT(plugin);
+       BT_OBJECT_PUT_REF_AND_RESET(plugin);
 
 end:
        return plugin;
 }
 
+static
+size_t count_non_null_items_in_section(const void *begin, const void *end)
+{
+       size_t count = 0;
+       const int * const *begin_int = (const int * const *) begin;
+       const int * const *end_int = (const int * const *) end;
+       const int * const *iter;
+
+       for (iter = begin_int; iter != end_int; iter++) {
+               if (*iter) {
+                       count++;
+               }
+       }
+
+       return count;
+}
+
 static
 struct bt_plugin_set *bt_plugin_so_create_all_from_sections(
                struct bt_plugin_so_shared_lib_handle *shared_lib_handle,
@@ -824,10 +1290,10 @@ struct bt_plugin_set *bt_plugin_so_create_all_from_sections(
        size_t i;
        struct bt_plugin_set *plugin_set = NULL;
 
-       descriptor_count = descriptors_end - descriptors_begin;
-       attrs_count = attrs_end - attrs_begin;
-       cc_descriptors_count = cc_descriptors_end - cc_descriptors_begin;
-       cc_descr_attrs_count = cc_descr_attrs_end - cc_descr_attrs_begin;
+       descriptor_count = count_non_null_items_in_section(descriptors_begin, descriptors_end);
+       attrs_count = count_non_null_items_in_section(attrs_begin, attrs_end);
+       cc_descriptors_count = count_non_null_items_in_section(cc_descriptors_begin, cc_descriptors_end);
+       cc_descr_attrs_count =  count_non_null_items_in_section(cc_descr_attrs_begin, cc_descr_attrs_end);
 
        BT_LOGD("Creating all SO plugins from sections: "
                "plugin-path=\"%s\", "
@@ -850,12 +1316,16 @@ struct bt_plugin_set *bt_plugin_so_create_all_from_sections(
                goto error;
        }
 
-       for (i = 0; i < descriptor_count; i++) {
+       for (i = 0; i < descriptors_end - descriptors_begin; i++) {
                enum bt_plugin_status status;
                const struct __bt_plugin_descriptor *descriptor =
                        descriptors_begin[i];
                struct bt_plugin *plugin;
 
+               if (descriptor == NULL) {
+                       continue;
+               }
+
                BT_LOGD("Creating plugin object for plugin: "
                        "name=\"%s\", abi-major=%d, abi-minor=%d",
                        descriptor->name, descriptor->major, descriptor->minor);
@@ -866,7 +1336,7 @@ struct bt_plugin_set *bt_plugin_so_create_all_from_sections(
                         * _trying_ to open this file as a compatible
                         * Babeltrace plugin: if it's not, it's not an
                         * error. And because this can be tried during
-                        * bt_plugin_create_all_from_dir(), it's not
+                        * bt_plugin_find_all_from_dir(), it's not
                         * even a warning.
                         */
                        BT_LOGD("Unknown ABI major version: abi-major=%d",
@@ -893,23 +1363,23 @@ struct bt_plugin_set *bt_plugin_so_create_all_from_sections(
                         * _trying_ to open this file as a compatible
                         * Babeltrace plugin: if it's not, it's not an
                         * error. And because this can be tried during
-                        * bt_plugin_create_all_from_dir(), it's not
+                        * bt_plugin_find_all_from_dir(), it's not
                         * even a warning.
                         */
                        BT_LOGD_STR("Cannot initialize SO plugin object from sections.");
-                       BT_PUT(plugin);
+                       BT_OBJECT_PUT_REF_AND_RESET(plugin);
                        goto error;
                }
 
                /* Add to plugin set */
                bt_plugin_set_add_plugin(plugin_set, plugin);
-               bt_put(plugin);
+               bt_object_put_ref(plugin);
        }
 
        goto end;
 
 error:
-       BT_PUT(plugin_set);
+       BT_OBJECT_PUT_REF_AND_RESET(plugin_set);
 
 end:
        return plugin_set;
@@ -928,17 +1398,17 @@ struct bt_plugin_set *bt_plugin_so_create_all_from_static(void)
 
        BT_LOGD_STR("Creating all SO plugins from built-in plugins.");
        plugin_set = bt_plugin_so_create_all_from_sections(shared_lib_handle,
-               SECTION_BEGIN(__bt_plugin_descriptors),
-               SECTION_END(__bt_plugin_descriptors),
-               SECTION_BEGIN(__bt_plugin_descriptor_attributes),
-               SECTION_END(__bt_plugin_descriptor_attributes),
-               SECTION_BEGIN(__bt_plugin_component_class_descriptors),
-               SECTION_END(__bt_plugin_component_class_descriptors),
-               SECTION_BEGIN(__bt_plugin_component_class_descriptor_attributes),
-               SECTION_END(__bt_plugin_component_class_descriptor_attributes));
+               __bt_get_begin_section_plugin_descriptors(),
+               __bt_get_end_section_plugin_descriptors(),
+               __bt_get_begin_section_plugin_descriptor_attributes(),
+               __bt_get_end_section_plugin_descriptor_attributes(),
+               __bt_get_begin_section_component_class_descriptors(),
+               __bt_get_end_section_component_class_descriptors(),
+               __bt_get_begin_section_component_class_descriptor_attributes(),
+               __bt_get_end_section_component_class_descriptor_attributes());
 
 end:
-       BT_PUT(shared_lib_handle);
+       BT_OBJECT_PUT_REF_AND_RESET(shared_lib_handle);
 
        return plugin_set;
 }
@@ -956,6 +1426,14 @@ struct bt_plugin_set *bt_plugin_so_create_all_from_file(const char *path)
        struct __bt_plugin_component_class_descriptor const * const *cc_descriptors_end = NULL;
        struct __bt_plugin_component_class_descriptor_attribute const * const *cc_descr_attrs_begin = NULL;
        struct __bt_plugin_component_class_descriptor_attribute const * const *cc_descr_attrs_end = NULL;
+       struct __bt_plugin_descriptor const * const *(*get_begin_section_plugin_descriptors)(void);
+       struct __bt_plugin_descriptor const * const *(*get_end_section_plugin_descriptors)(void);
+       struct __bt_plugin_descriptor_attribute const * const *(*get_begin_section_plugin_descriptor_attributes)(void);
+       struct __bt_plugin_descriptor_attribute const * const *(*get_end_section_plugin_descriptor_attributes)(void);
+       struct __bt_plugin_component_class_descriptor const * const *(*get_begin_section_component_class_descriptors)(void);
+       struct __bt_plugin_component_class_descriptor const * const *(*get_end_section_component_class_descriptors)(void);
+       struct __bt_plugin_component_class_descriptor_attribute const * const *(*get_begin_section_component_class_descriptor_attributes)(void);
+       struct __bt_plugin_component_class_descriptor_attribute const * const *(*get_end_section_component_class_descriptor_attributes)(void);
        bt_bool is_libtool_wrapper = BT_FALSE, is_shared_object = BT_FALSE;
        struct bt_plugin_so_shared_lib_handle *shared_lib_handle = NULL;
 
@@ -995,34 +1473,42 @@ struct bt_plugin_set *bt_plugin_so_create_all_from_file(const char *path)
                goto end;
        }
 
-       if (!g_module_symbol(shared_lib_handle->module, "__start___bt_plugin_descriptors",
-                       (gpointer *) &descriptors_begin)) {
+       if (g_module_symbol(shared_lib_handle->module, "__bt_get_begin_section_plugin_descriptors",
+                       (gpointer *) &get_begin_section_plugin_descriptors)) {
+               descriptors_begin = get_begin_section_plugin_descriptors();
+       } else {
                BT_LOGD("Cannot resolve plugin symbol: path=\"%s\", "
                        "symbol=\"%s\"", path,
-                       "__start___bt_plugin_descriptors");
+                       "__bt_get_begin_section_plugin_descriptors");
                goto end;
        }
 
-       if (!g_module_symbol(shared_lib_handle->module, "__stop___bt_plugin_descriptors",
-                       (gpointer *) &descriptors_end)) {
+       if (g_module_symbol(shared_lib_handle->module, "__bt_get_end_section_plugin_descriptors",
+                       (gpointer *) &get_end_section_plugin_descriptors)) {
+               descriptors_end = get_end_section_plugin_descriptors();
+       } else {
                BT_LOGD("Cannot resolve plugin symbol: path=\"%s\", "
                        "symbol=\"%s\"", path,
-                       "__stop___bt_plugin_descriptors");
+                       "__bt_get_end_section_plugin_descriptors");
                goto end;
        }
 
-       if (!g_module_symbol(shared_lib_handle->module, "__start___bt_plugin_descriptor_attributes",
-                       (gpointer *) &attrs_begin)) {
+       if (g_module_symbol(shared_lib_handle->module, "__bt_get_begin_section_plugin_descriptor_attributes",
+                       (gpointer *) &get_begin_section_plugin_descriptor_attributes)) {
+                attrs_begin = get_begin_section_plugin_descriptor_attributes();
+       } else {
                BT_LOGD("Cannot resolve plugin symbol: path=\"%s\", "
                        "symbol=\"%s\"", path,
-                       "__start___bt_plugin_descriptor_attributes");
+                       "__bt_get_begin_section_plugin_descriptor_attributes");
        }
 
-       if (!g_module_symbol(shared_lib_handle->module, "__stop___bt_plugin_descriptor_attributes",
-                       (gpointer *) &attrs_end)) {
+       if (g_module_symbol(shared_lib_handle->module, "__bt_get_end_section_plugin_descriptor_attributes",
+                       (gpointer *) &get_end_section_plugin_descriptor_attributes)) {
+               attrs_end = get_end_section_plugin_descriptor_attributes();
+       } else {
                BT_LOGD("Cannot resolve plugin symbol: path=\"%s\", "
                        "symbol=\"%s\"", path,
-                       "__stop___bt_plugin_descriptor_attributes");
+                       "__bt_get_end_section_plugin_descriptor_attributes");
        }
 
        if ((!!attrs_begin - !!attrs_end) != 0) {
@@ -1030,24 +1516,28 @@ struct bt_plugin_set *bt_plugin_so_create_all_from_file(const char *path)
                        "path=\"%s\", symbol-start=\"%s\", "
                        "symbol-end=\"%s\", symbol-start-addr=%p, "
                        "symbol-end-addr=%p",
-                       path, "__start___bt_plugin_descriptor_attributes",
-                       "__stop___bt_plugin_descriptor_attributes",
+                       path, "__bt_get_begin_section_plugin_descriptor_attributes",
+                       "__bt_get_end_section_plugin_descriptor_attributes",
                        attrs_begin, attrs_end);
                goto end;
        }
 
-       if (!g_module_symbol(shared_lib_handle->module, "__start___bt_plugin_component_class_descriptors",
-                       (gpointer *) &cc_descriptors_begin)) {
+       if (g_module_symbol(shared_lib_handle->module, "__bt_get_begin_section_component_class_descriptors",
+                       (gpointer *) &get_begin_section_component_class_descriptors)) {
+               cc_descriptors_begin = get_begin_section_component_class_descriptors();
+       } else {
                BT_LOGD("Cannot resolve plugin symbol: path=\"%s\", "
                        "symbol=\"%s\"", path,
-                       "__start___bt_plugin_component_class_descriptors");
+                       "__bt_get_begin_section_component_class_descriptors");
        }
 
-       if (!g_module_symbol(shared_lib_handle->module, "__stop___bt_plugin_component_class_descriptors",
-                       (gpointer *) &cc_descriptors_end)) {
+       if (g_module_symbol(shared_lib_handle->module, "__bt_get_end_section_component_class_descriptors",
+                       (gpointer *) &get_end_section_component_class_descriptors)) {
+               cc_descriptors_end = get_end_section_component_class_descriptors();
+       } else {
                BT_LOGD("Cannot resolve plugin symbol: path=\"%s\", "
                        "symbol=\"%s\"", path,
-                       "__stop___bt_plugin_component_class_descriptors");
+                       "__bt_get_end_section_component_class_descriptors");
        }
 
        if ((!!cc_descriptors_begin - !!cc_descriptors_end) != 0) {
@@ -1055,24 +1545,28 @@ struct bt_plugin_set *bt_plugin_so_create_all_from_file(const char *path)
                        "path=\"%s\", symbol-start=\"%s\", "
                        "symbol-end=\"%s\", symbol-start-addr=%p, "
                        "symbol-end-addr=%p",
-                       path, "__start___bt_plugin_component_class_descriptors",
-                       "__stop___bt_plugin_component_class_descriptors",
+                       path, "__bt_get_begin_section_component_class_descriptors",
+                       "__bt_get_end_section_component_class_descriptors",
                        cc_descriptors_begin, cc_descriptors_end);
                goto end;
        }
 
-       if (!g_module_symbol(shared_lib_handle->module, "__start___bt_plugin_component_class_descriptor_attributes",
-                       (gpointer *) &cc_descr_attrs_begin)) {
+       if (g_module_symbol(shared_lib_handle->module, "__bt_get_begin_section_component_class_descriptor_attributes",
+                       (gpointer *) &get_begin_section_component_class_descriptor_attributes)) {
+               cc_descr_attrs_begin = get_begin_section_component_class_descriptor_attributes();
+       } else {
                BT_LOGD("Cannot resolve plugin symbol: path=\"%s\", "
                        "symbol=\"%s\"", path,
-                       "__start___bt_plugin_component_class_descriptor_attributes");
+                       "__bt_get_begin_section_component_class_descriptor_attributes");
        }
 
-       if (!g_module_symbol(shared_lib_handle->module, "__stop___bt_plugin_component_class_descriptor_attributes",
-                       (gpointer *) &cc_descr_attrs_end)) {
+       if (g_module_symbol(shared_lib_handle->module, "__bt_get_end_section_component_class_descriptor_attributes",
+                       (gpointer *) &get_end_section_component_class_descriptor_attributes)) {
+               cc_descr_attrs_end = get_end_section_component_class_descriptor_attributes();
+       } else {
                BT_LOGD("Cannot resolve plugin symbol: path=\"%s\", "
                        "symbol=\"%s\"", path,
-                       "__stop___bt_plugin_component_class_descriptor_attributes");
+                       "__bt_get_end_section_component_class_descriptor_attributes");
        }
 
        if ((!!cc_descr_attrs_begin - !!cc_descr_attrs_end) != 0) {
@@ -1080,8 +1574,8 @@ struct bt_plugin_set *bt_plugin_so_create_all_from_file(const char *path)
                        "path=\"%s\", symbol-start=\"%s\", "
                        "symbol-end=\"%s\", symbol-start-addr=%p, "
                        "symbol-end-addr=%p",
-                       path, "__start___bt_plugin_component_class_descriptor_attributes",
-                       "__stop___bt_plugin_component_class_descriptor_attributes",
+                       path, "__bt_get_begin_section_component_class_descriptor_attributes",
+                       "__bt_get_end_section_component_class_descriptor_attributes",
                        cc_descr_attrs_begin, cc_descr_attrs_end);
                goto end;
        }
@@ -1094,7 +1588,7 @@ struct bt_plugin_set *bt_plugin_so_create_all_from_file(const char *path)
                cc_descr_attrs_begin, cc_descr_attrs_end);
 
 end:
-       BT_PUT(shared_lib_handle);
+       BT_OBJECT_PUT_REF_AND_RESET(shared_lib_handle);
        return plugin_set;
 }
 
@@ -1103,22 +1597,22 @@ void plugin_comp_class_destroy_listener(struct bt_component_class *comp_class,
                void *data)
 {
        bt_list_del(&comp_class->node);
-       BT_PUT(comp_class->so_handle);
+       BT_OBJECT_PUT_REF_AND_RESET(comp_class->so_handle);
        BT_LOGV("Component class destroyed: removed entry from list: "
                "comp-cls-addr=%p", comp_class);
 }
 
-BT_HIDDEN
 void bt_plugin_so_on_add_component_class(struct bt_plugin *plugin,
                struct bt_component_class *comp_class)
 {
        struct bt_plugin_so_spec_data *spec = plugin->spec_data;
 
-       assert(plugin->spec_data);
-       assert(plugin->type == BT_PLUGIN_TYPE_SO);
+       BT_ASSERT(plugin->spec_data);
+       BT_ASSERT(plugin->type == BT_PLUGIN_TYPE_SO);
 
        bt_list_add(&comp_class->node, &component_class_list);
-       comp_class->so_handle = bt_get(spec->shared_lib_handle);
+       comp_class->so_handle = spec->shared_lib_handle;
+       bt_object_get_no_null_check(comp_class->so_handle);
 
        /* Add our custom destroy listener */
        bt_component_class_add_destroy_listener(comp_class,
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