lib: fully detach CTF IR and CTF writer implementations
[babeltrace.git] / lib / ctf-writer / event.c
index b2a7f23206622dc3a591a15528e2118c147bf558..603b3cf0339de442dd86242ab6c87ab785fb84b1 100644 (file)
 #define BT_LOG_TAG "CTF-WRITER-EVENT"
 #include <babeltrace/lib-logging-internal.h>
 
-#include <babeltrace/ctf-ir/event-internal.h>
+#include <babeltrace/assert-pre-internal.h>
+#include <babeltrace/assert-internal.h>
+#include <babeltrace/compiler-internal.h>
+#include <babeltrace/ctf-writer/attributes-internal.h>
+#include <babeltrace/ctf-writer/clock-class-internal.h>
 #include <babeltrace/ctf-writer/clock-internal.h>
+#include <babeltrace/ctf-writer/event-class-internal.h>
 #include <babeltrace/ctf-writer/event-internal.h>
 #include <babeltrace/ctf-writer/event.h>
-#include <babeltrace/ctf-writer/fields-internal.h>
 #include <babeltrace/ctf-writer/field-types-internal.h>
 #include <babeltrace/ctf-writer/field-types.h>
+#include <babeltrace/ctf-writer/fields-internal.h>
 #include <babeltrace/ctf-writer/fields.h>
 #include <babeltrace/ctf-writer/stream-class-internal.h>
 #include <babeltrace/ctf-writer/stream-class.h>
+#include <babeltrace/ctf-writer/stream-internal.h>
 #include <babeltrace/ctf-writer/trace-internal.h>
 #include <babeltrace/ctf-writer/trace.h>
+#include <babeltrace/ctf-writer/utils.h>
+#include <babeltrace/ctf-writer/validation-internal.h>
 #include <babeltrace/ref.h>
-#include <babeltrace/compiler-internal.h>
-#include <babeltrace/assert-internal.h>
-#include <babeltrace/assert-pre-internal.h>
 #include <inttypes.h>
 
 static
-void bt_ctf_event_destroy(struct bt_object *obj);
+int bt_ctf_event_common_validate_types_for_create(
+               struct bt_ctf_event_class_common *event_class,
+               struct bt_ctf_validation_output *validation_output,
+               bt_ctf_validation_flag_copy_field_type_func copy_field_type_func)
+{
+       int ret;
+       enum bt_ctf_validation_flag validation_flags =
+               BT_CTF_VALIDATION_FLAG_STREAM |
+               BT_CTF_VALIDATION_FLAG_EVENT;
+       struct bt_ctf_trace_common *trace = NULL;
+       struct bt_ctf_stream_class_common *stream_class = NULL;
+       struct bt_ctf_field_type_common *packet_header_type = NULL;
+       struct bt_ctf_field_type_common *packet_context_type = NULL;
+       struct bt_ctf_field_type_common *event_header_type = NULL;
+       struct bt_ctf_field_type_common *stream_event_ctx_type = NULL;
+       struct bt_ctf_field_type_common *event_context_type = NULL;
+       struct bt_ctf_field_type_common *event_payload_type = NULL;
+       int trace_valid = 0;
+       struct bt_value *environment = NULL;
+
+       stream_class = bt_ctf_event_class_common_borrow_stream_class(event_class);
+       BT_ASSERT(stream_class);
+       trace = bt_ctf_stream_class_common_borrow_trace(stream_class);
+       if (trace) {
+               BT_LOGD_STR("Event class is part of a trace.");
+               packet_header_type =
+                       bt_ctf_trace_common_borrow_packet_header_field_type(trace);
+               trace_valid = trace->valid;
+               BT_ASSERT(trace_valid);
+               environment = trace->environment;
+       }
+
+       packet_context_type =
+               bt_ctf_stream_class_common_borrow_packet_context_field_type(
+                       stream_class);
+       event_header_type =
+               bt_ctf_stream_class_common_borrow_event_header_field_type(
+                       stream_class);
+       stream_event_ctx_type =
+               bt_ctf_stream_class_common_borrow_event_context_field_type(
+                       stream_class);
+       event_context_type =
+               bt_ctf_event_class_common_borrow_context_field_type(event_class);
+       event_payload_type =
+               bt_ctf_event_class_common_borrow_payload_field_type(event_class);
+       ret = bt_ctf_validate_class_types(environment, packet_header_type,
+               packet_context_type, event_header_type, stream_event_ctx_type,
+               event_context_type, event_payload_type, trace_valid,
+               stream_class->valid, event_class->valid,
+               validation_output, validation_flags, copy_field_type_func);
+       if (ret) {
+               /*
+                * This means something went wrong during the validation
+                * process, not that the objects are invalid.
+                */
+               BT_LOGE("Failed to validate event and parents: ret=%d", ret);
+               goto error;
+       }
+
+       if ((validation_output->valid_flags & validation_flags) !=
+                       validation_flags) {
+               /* Invalid trace/stream class/event class */
+               BT_LOGW("Invalid trace, stream class, or event class: "
+                       "valid-flags=0x%x", validation_output->valid_flags);
+               goto error;
+       }
+
+       goto end;
+
+error:
+       bt_ctf_validation_output_put_types(validation_output);
+       ret = -1;
+
+end:
+       return ret;
+}
 
 static
-int map_clock_classes_func(struct bt_stream_class_common *stream_class,
-               struct bt_field_type_common *packet_context_type,
-               struct bt_field_type_common *event_header_type)
+int bt_ctf_event_common_create_fields(
+               struct bt_ctf_stream_class_common *stream_class,
+               struct bt_ctf_validation_output *validation_output,
+               create_field_func create_field_func,
+               release_field_func release_field_func,
+               create_header_field_func create_header_field_func,
+               release_header_field_func release_header_field_func,
+               struct bt_ctf_field_wrapper **header_field,
+               struct bt_ctf_field_common **stream_event_context_field,
+               struct bt_ctf_field_common **context_field,
+               struct bt_ctf_field_common **payload_field)
+{
+       int ret = 0;
+
+       if (validation_output->event_header_type) {
+               BT_LOGD("Creating initial event header field: ft-addr=%p",
+                       validation_output->event_header_type);
+               *header_field =
+                       create_header_field_func(stream_class,
+                               validation_output->event_header_type);
+               if (!*header_field) {
+                       BT_LOGE_STR("Cannot create initial event header field object.");
+                       goto error;
+               }
+       }
+
+       if (validation_output->stream_event_ctx_type) {
+               BT_LOGD("Creating initial stream event context field: ft-addr=%p",
+                       validation_output->stream_event_ctx_type);
+               *stream_event_context_field = create_field_func(
+                       validation_output->stream_event_ctx_type);
+               if (!*stream_event_context_field) {
+                       BT_LOGE_STR("Cannot create initial stream event context field object.");
+                       goto error;
+               }
+       }
+
+       if (validation_output->event_context_type) {
+               BT_LOGD("Creating initial event context field: ft-addr=%p",
+                       validation_output->event_context_type);
+               *context_field = create_field_func(
+                       validation_output->event_context_type);
+               if (!*context_field) {
+                       BT_LOGE_STR("Cannot create initial event context field object.");
+                       goto error;
+               }
+       }
+
+       if (validation_output->event_payload_type) {
+               BT_LOGD("Creating initial event payload field: ft-addr=%p",
+                       validation_output->event_payload_type);
+               *payload_field = create_field_func(
+                       validation_output->event_payload_type);
+               if (!*payload_field) {
+                       BT_LOGE_STR("Cannot create initial event payload field object.");
+                       goto error;
+               }
+       }
+
+       goto end;
+
+error:
+       if (*header_field) {
+               release_header_field_func(*header_field, stream_class);
+       }
+
+       if (*stream_event_context_field) {
+               release_field_func(*stream_event_context_field);
+       }
+
+       if (*context_field) {
+               release_field_func(*context_field);
+       }
+
+       if (*payload_field) {
+               release_field_func(*payload_field);
+       }
+
+       ret = -1;
+
+end:
+       return ret;
+}
+
+BT_HIDDEN
+int _bt_ctf_event_common_validate(struct bt_ctf_event_common *event)
+{
+       int ret = 0;
+       struct bt_ctf_stream_class_common *stream_class;
+
+       BT_ASSERT(event);
+       if (event->header_field) {
+               ret = bt_ctf_field_common_validate_recursive(
+                       event->header_field->field);
+               if (ret) {
+                       BT_ASSERT_PRE_MSG("Invalid event's header field: "
+                               "event-addr=%p, field-addr=%p",
+                               event, event->header_field->field);
+                       goto end;
+               }
+       }
+
+       stream_class = bt_ctf_event_class_common_borrow_stream_class(event->class);
+
+       /*
+        * We should not have been able to create the event without associating
+        * the event class to a stream class.
+        */
+       BT_ASSERT(stream_class);
+
+       if (stream_class->event_context_field_type) {
+               ret = bt_ctf_field_common_validate_recursive(
+                       event->stream_event_context_field);
+               if (ret) {
+                       BT_ASSERT_PRE_MSG("Invalid event's stream event context field: "
+                               "event-addr=%p, field-addr=%p",
+                               event, event->stream_event_context_field);
+                       goto end;
+               }
+       }
+
+       if (event->class->context_field_type) {
+               ret = bt_ctf_field_common_validate_recursive(event->context_field);
+               if (ret) {
+                       BT_ASSERT_PRE_MSG("Invalid event's payload field: "
+                               "event-addr=%p, field-addr=%p",
+                               event, event->context_field);
+                       goto end;
+               }
+       }
+
+       ret = bt_ctf_field_common_validate_recursive(event->payload_field);
+       if (ret) {
+               BT_ASSERT_PRE_MSG("Invalid event's payload field: "
+                       "event-addr=%p, field-addr=%p",
+                       event, event->payload_field);
+               goto end;
+       }
+
+end:
+       return ret;
+}
+
+BT_HIDDEN
+void _bt_ctf_event_common_set_is_frozen(struct bt_ctf_event_common *event,
+               bool is_frozen)
+{
+       BT_ASSERT(event);
+       BT_LOGD("Freezing event: addr=%p, "
+               "event-class-name=\"%s\", event-class-id=%" PRId64,
+               event, bt_ctf_event_class_common_get_name(event->class),
+               bt_ctf_event_class_common_get_id(event->class));
+
+       if (event->header_field) {
+               BT_LOGD_STR("Freezing event's header field.");
+               bt_ctf_field_common_set_is_frozen_recursive(
+                       event->header_field->field, is_frozen);
+       }
+
+       if (event->stream_event_context_field) {
+               BT_LOGD_STR("Freezing event's stream event context field.");
+               bt_ctf_field_common_set_is_frozen_recursive(
+                       event->stream_event_context_field, is_frozen);
+       }
+
+       if (event->context_field) {
+               BT_LOGD_STR("Freezing event's context field.");
+               bt_ctf_field_common_set_is_frozen_recursive(event->context_field,
+                       is_frozen);
+       }
+
+       if (event->payload_field) {
+               BT_LOGD_STR("Freezing event's payload field.");
+               bt_ctf_field_common_set_is_frozen_recursive(event->payload_field,
+                       is_frozen);
+       }
+
+       event->frozen = is_frozen;
+}
+
+BT_HIDDEN
+int bt_ctf_event_common_initialize(struct bt_ctf_event_common *event,
+               struct bt_ctf_event_class_common *event_class,
+               struct bt_ctf_clock_class *init_expected_clock_class,
+               bool is_shared_with_parent, bt_object_release_func release_func,
+               bt_ctf_validation_flag_copy_field_type_func field_type_copy_func,
+               bool must_be_in_trace,
+               int (*map_clock_classes_func)(struct bt_ctf_stream_class_common *stream_class,
+                       struct bt_ctf_field_type_common *packet_context_field_type,
+                       struct bt_ctf_field_type_common *event_header_field_type),
+               create_field_func create_field_func,
+               release_field_func release_field_func,
+               create_header_field_func create_header_field_func,
+               release_header_field_func release_header_field_func)
+{
+       int ret;
+       struct bt_ctf_trace_common *trace = NULL;
+       struct bt_ctf_stream_class_common *stream_class = NULL;
+       struct bt_ctf_field_wrapper *event_header = NULL;
+       struct bt_ctf_field_common *stream_event_context = NULL;
+       struct bt_ctf_field_common *event_context = NULL;
+       struct bt_ctf_field_common *event_payload = NULL;
+       struct bt_ctf_validation_output validation_output = { 0 };
+       struct bt_ctf_clock_class *expected_clock_class =
+               init_expected_clock_class ? bt_get(init_expected_clock_class) :
+               NULL;
+
+       BT_ASSERT_PRE_NON_NULL(event_class, "Event class");
+       BT_LOGD("Initializing common event object: event-class-addr=%p, "
+               "event-class-name=\"%s\", event-class-id=%" PRId64,
+               event_class, bt_ctf_event_class_common_get_name(event_class),
+               bt_ctf_event_class_common_get_id(event_class));
+
+       stream_class = bt_ctf_event_class_common_borrow_stream_class(event_class);
+       BT_ASSERT_PRE(stream_class,
+               "Event class is not part of a stream class: event-class-addr=%p",
+               event_class);
+
+       /* The event class was frozen when added to its stream class */
+       BT_ASSERT(event_class->frozen);
+       trace = bt_ctf_stream_class_common_borrow_trace(stream_class);
+
+       if (must_be_in_trace) {
+               BT_ASSERT_PRE(trace,
+                       "Event class's stream class is not part of a trace: "
+                       "ec-addr=%p, sc-addr=%p", event_class, stream_class);
+       }
+
+       /*
+        * This must be called before anything that can fail because on
+        * failure, the caller releases the reference to `event` to
+        * destroy it.
+        */
+       if (is_shared_with_parent) {
+               bt_object_init_shared_with_parent(&event->base, release_func);
+       } else {
+               bt_object_init_unique(&event->base);
+       }
+
+       if (!stream_class->frozen) {
+               /*
+                * Because this function freezes the stream class,
+                * validate that this stream class contains at most a
+                * single clock class so that we set its expected clock
+                * class for future checks.
+                */
+               ret = bt_ctf_stream_class_common_validate_single_clock_class(
+                       stream_class, &expected_clock_class);
+               if (ret) {
+                       BT_LOGW("Event class's stream class or one of its event "
+                               "classes contains a field type which is not "
+                               "recursively mapped to the expected "
+                               "clock class: "
+                               "stream-class-addr=%p, "
+                               "stream-class-id=%" PRId64 ", "
+                               "stream-class-name=\"%s\", "
+                               "expected-clock-class-addr=%p, "
+                               "expected-clock-class-name=\"%s\"",
+                               stream_class,
+                               bt_ctf_stream_class_common_get_id(stream_class),
+                               bt_ctf_stream_class_common_get_name(stream_class),
+                               expected_clock_class,
+                               expected_clock_class ?
+                                       bt_ctf_clock_class_get_name(expected_clock_class) :
+                                       NULL);
+                       goto error;
+               }
+       }
+
+       /* Validate the trace, the stream class, and the event class */
+       ret = bt_ctf_event_common_validate_types_for_create(
+               event_class, &validation_output, field_type_copy_func);
+       if (ret) {
+               /* bt_ctf_event_common_validate_types_for_create() logs errors */
+               goto error;
+       }
+
+       if (map_clock_classes_func) {
+               /*
+                * Safe to automatically map selected fields to the
+                * stream's clock's class here because the stream class
+                * is about to be frozen.
+                */
+               if (map_clock_classes_func(stream_class,
+                               validation_output.packet_context_type,
+                               validation_output.event_header_type)) {
+                       BT_LOGW_STR("Cannot automatically map selected stream class's "
+                               "field types to stream class's clock's class.");
+                       goto error;
+               }
+       }
+
+       /*
+        * event does not share a common ancestor with the event class; it has
+        * to guarantee its existence by holding a reference. This reference
+        * shall be released once the event is associated to a stream since,
+        * from that point, the event and its class will share the same
+        * lifetime.
+        */
+       event->class = bt_get(event_class);
+
+       ret = bt_ctf_event_common_create_fields(stream_class,
+               &validation_output,
+               create_field_func, release_field_func,
+               create_header_field_func, release_header_field_func,
+               &event_header, &stream_event_context, &event_context,
+               &event_payload);
+       if (ret) {
+               /* bt_ctf_event_common_create_fields() logs errors */
+               goto error;
+       }
+
+       /*
+        * At this point all the fields are created, potentially from
+        * validated copies of field types, so that the field types and
+        * fields can be replaced in the trace, stream class,
+        * event class, and created event.
+        */
+       bt_ctf_validation_replace_types(trace, stream_class, event_class,
+               &validation_output,
+               BT_CTF_VALIDATION_FLAG_STREAM | BT_CTF_VALIDATION_FLAG_EVENT);
+       event->header_field = event_header;
+       event_header = NULL;
+       event->stream_event_context_field = stream_event_context;
+       stream_event_context = NULL;
+       event->context_field = event_context;
+       event_context = NULL;
+       event->payload_field = event_payload;
+       event_payload = NULL;
+
+       /*
+        * Put what was not moved in bt_ctf_validation_replace_types().
+        */
+       bt_ctf_validation_output_put_types(&validation_output);
+
+       /*
+        * Freeze the stream class since the event header must not be changed
+        * anymore.
+        */
+       bt_ctf_stream_class_common_freeze(stream_class);
+
+       /*
+        * It is safe to set the stream class's unique clock class
+        * now because the stream class is frozen.
+        */
+       if (expected_clock_class) {
+               BT_MOVE(stream_class->clock_class, expected_clock_class);
+       }
+
+       /*
+        * Mark stream class, and event class as valid since
+        * they're all frozen now.
+        */
+       stream_class->valid = 1;
+       event_class->valid = 1;
+
+       /* Put stuff we borrowed from the event class */
+       BT_LOGD("Initialized event object: addr=%p, event-class-name=\"%s\", "
+               "event-class-id=%" PRId64,
+               event, bt_ctf_event_class_common_get_name(event->class),
+               bt_ctf_event_class_common_get_id(event->class));
+       goto end;
+
+error:
+       bt_ctf_validation_output_put_types(&validation_output);
+       bt_put(expected_clock_class);
+
+       if (event_header) {
+               release_header_field_func(event_header, stream_class);
+       }
+
+       if (stream_event_context) {
+               release_field_func(stream_event_context);
+       }
+
+       if (event_context) {
+               release_field_func(event_context);
+       }
+
+       if (event_payload) {
+               release_field_func(event_payload);
+       }
+
+       ret = -1;
+
+end:
+       return ret;
+}
+
+int map_clock_classes_func(struct bt_ctf_stream_class_common *stream_class,
+               struct bt_ctf_field_type_common *packet_context_type,
+               struct bt_ctf_field_type_common *event_header_type)
 {
        int ret = bt_ctf_stream_class_map_clock_class(
-               BT_FROM_COMMON(stream_class),
-               BT_FROM_COMMON(packet_context_type),
-               BT_FROM_COMMON(event_header_type));
+               BT_CTF_FROM_COMMON(stream_class),
+               BT_CTF_FROM_COMMON(packet_context_type),
+               BT_CTF_FROM_COMMON(event_header_type));
 
        if (ret) {
                BT_LOGW_STR("Cannot automatically map selected stream class's field types to stream class's clock's class.");
@@ -63,26 +532,26 @@ int map_clock_classes_func(struct bt_stream_class_common *stream_class,
 }
 
 static
-void destroy_event_header_field(struct bt_field_wrapper *field_wrapper)
+void destroy_event_header_field(struct bt_ctf_field_wrapper *field_wrapper)
 {
        BT_ASSERT(field_wrapper);
        bt_put(field_wrapper->field);
-       bt_field_wrapper_destroy(field_wrapper);
+       bt_ctf_field_wrapper_destroy(field_wrapper);
 }
 
 static
-struct bt_field_wrapper *create_event_header_field(
-               struct bt_stream_class *stream_class,
-               struct bt_field_type_common *ft)
+struct bt_ctf_field_wrapper *create_event_header_field(
+               struct bt_ctf_stream_class *stream_class,
+               struct bt_ctf_field_type_common *ft)
 {
-       struct bt_field_wrapper *field_wrapper = NULL;
+       struct bt_ctf_field_wrapper *field_wrapper = NULL;
        struct bt_ctf_field *field = bt_ctf_field_create((void *) ft);
 
        if (!field) {
                goto error;
        }
 
-       field_wrapper = bt_field_wrapper_new(NULL);
+       field_wrapper = bt_ctf_field_wrapper_new(NULL);
        if (!field_wrapper) {
                goto error;
        }
@@ -103,11 +572,28 @@ end:
        return field_wrapper;
 }
 
+static
+void release_event_header_field(struct bt_ctf_field_wrapper *field_wrapper,
+               struct bt_ctf_event_common *event_common)
+{
+       BT_ASSERT(field_wrapper);
+       BT_PUT(field_wrapper->field);
+       bt_ctf_field_wrapper_destroy(field_wrapper);
+}
+
+static
+void bt_ctf_event_destroy(struct bt_object *obj)
+{
+       bt_ctf_event_common_finalize(obj, (void *) bt_put,
+               (void *) release_event_header_field);
+       g_free(obj);
+}
+
 struct bt_ctf_event *bt_ctf_event_create(struct bt_ctf_event_class *event_class)
 {
        int ret;
        struct bt_ctf_event *event = NULL;
-       struct bt_clock_class *expected_clock_class = NULL;
+       struct bt_ctf_clock_class *expected_clock_class = NULL;
 
        event = g_new0(struct bt_ctf_event, 1);
        if (!event) {
@@ -117,19 +603,18 @@ struct bt_ctf_event *bt_ctf_event_create(struct bt_ctf_event_class *event_class)
 
        if (event_class) {
                struct bt_ctf_stream_class *stream_class =
-                       BT_FROM_COMMON(bt_event_class_common_borrow_stream_class(
-                               BT_TO_COMMON(event_class)));
+                       BT_CTF_FROM_COMMON(bt_ctf_event_class_common_borrow_stream_class(
+                               BT_CTF_TO_COMMON(event_class)));
 
                if (stream_class && stream_class->clock) {
-                       expected_clock_class = BT_TO_COMMON(
-                               stream_class->clock->clock_class);
+                       expected_clock_class = stream_class->clock->clock_class;
                }
        }
 
-       ret = bt_event_common_initialize(BT_TO_COMMON(event),
-               BT_TO_COMMON(event_class), expected_clock_class,
+       ret = bt_ctf_event_common_initialize(BT_CTF_TO_COMMON(event),
+               BT_CTF_TO_COMMON(event_class), expected_clock_class,
                true, bt_ctf_event_destroy,
-               (bt_validation_flag_copy_field_type_func)
+               (bt_ctf_validation_flag_copy_field_type_func)
                        bt_ctf_field_type_copy,
                false, map_clock_classes_func,
                (create_field_func) bt_ctf_field_create,
@@ -137,7 +622,7 @@ struct bt_ctf_event *bt_ctf_event_create(struct bt_ctf_event_class *event_class)
                (create_header_field_func) create_event_header_field,
                (release_header_field_func) destroy_event_header_field);
        if (ret) {
-               /* bt_event_common_initialize() logs errors */
+               /* bt_ctf_event_common_initialize() logs errors */
                goto error;
        }
 
@@ -153,7 +638,7 @@ end:
 struct bt_ctf_event_class *bt_ctf_event_get_class(struct bt_ctf_event *event)
 {
        BT_ASSERT_PRE_NON_NULL(event, "Event");
-       return bt_get(bt_event_common_borrow_class(BT_TO_COMMON(event)));
+       return bt_get(bt_ctf_event_common_borrow_class(BT_CTF_TO_COMMON(event)));
 }
 
 BT_HIDDEN
@@ -161,7 +646,7 @@ struct bt_ctf_stream *bt_ctf_event_borrow_stream(struct bt_ctf_event *event)
 {
        BT_ASSERT(event);
        return (struct bt_ctf_stream *)
-               bt_object_borrow_parent(&BT_TO_COMMON(event)->base);
+               bt_object_borrow_parent(&BT_CTF_TO_COMMON(event)->base);
 }
 
 struct bt_ctf_stream *bt_ctf_event_get_stream(struct bt_ctf_event *event)
@@ -175,7 +660,7 @@ int bt_ctf_event_set_payload(struct bt_ctf_event *event, const char *name,
 {
        BT_ASSERT_PRE_NON_NULL(event, "Event");
        BT_ASSERT_PRE_NON_NULL(field, "Payload field");
-       BT_ASSERT_PRE_EVENT_COMMON_HOT(BT_TO_COMMON(event), "Event");
+       BT_ASSERT_PRE_EVENT_COMMON_HOT(BT_CTF_TO_COMMON(event), "Event");
        return bt_ctf_field_structure_set_field_by_name(
                (void *) event->common.payload_field, name, field);
 }
@@ -189,9 +674,9 @@ struct bt_ctf_field *bt_ctf_event_get_payload(struct bt_ctf_event *event,
 
        if (name) {
                field = bt_ctf_field_structure_get_field_by_name(
-                       BT_FROM_COMMON(event->common.payload_field), name);
+                       BT_CTF_FROM_COMMON(event->common.payload_field), name);
        } else {
-               field = BT_FROM_COMMON(event->common.payload_field);
+               field = BT_CTF_FROM_COMMON(event->common.payload_field);
                bt_get(field);
        }
 
@@ -201,41 +686,24 @@ struct bt_ctf_field *bt_ctf_event_get_payload(struct bt_ctf_event *event,
 struct bt_ctf_field *bt_ctf_event_get_payload_field(
                struct bt_ctf_event *event)
 {
-       return bt_get(bt_event_common_borrow_payload(BT_TO_COMMON(event)));
+       return bt_get(bt_ctf_event_common_borrow_payload(BT_CTF_TO_COMMON(event)));
 }
 
 struct bt_ctf_field *bt_ctf_event_get_header(struct bt_ctf_event *event)
 {
-       return bt_get(bt_event_common_borrow_header(BT_TO_COMMON(event)));
+       return bt_get(bt_ctf_event_common_borrow_header(BT_CTF_TO_COMMON(event)));
 }
 
 struct bt_ctf_field *bt_ctf_event_get_context(struct bt_ctf_event *event)
 {
-       return bt_get(bt_event_common_borrow_context(BT_TO_COMMON(event)));
+       return bt_get(bt_ctf_event_common_borrow_context(BT_CTF_TO_COMMON(event)));
 }
 
 struct bt_ctf_field *bt_ctf_event_get_stream_event_context(
                struct bt_ctf_event *event)
 {
-       return bt_get(bt_event_common_borrow_stream_event_context(
-               BT_TO_COMMON(event)));
-}
-
-static
-void release_event_header_field(struct bt_field_wrapper *field_wrapper,
-               struct bt_event_common *event_common)
-{
-       BT_ASSERT(field_wrapper);
-       BT_PUT(field_wrapper->field);
-       bt_field_wrapper_destroy(field_wrapper);
-}
-
-static
-void bt_ctf_event_destroy(struct bt_object *obj)
-{
-       bt_event_common_finalize(obj, (void *) bt_put,
-               (void *) release_event_header_field);
-       g_free(obj);
+       return bt_get(bt_ctf_event_common_borrow_stream_event_context(
+               BT_CTF_TO_COMMON(event)));
 }
 
 BT_HIDDEN
@@ -258,8 +726,8 @@ int bt_ctf_event_serialize(struct bt_ctf_event *event,
                                "event-addr=%p, event-class-name=\"%s\", "
                                "event-class-id=%" PRId64,
                                event,
-                               bt_event_class_common_get_name(event->common.class),
-                               bt_event_class_common_get_id(event->common.class));
+                               bt_ctf_event_class_common_get_name(event->common.class),
+                               bt_ctf_event_class_common_get_id(event->common.class));
                        goto end;
                }
        }
@@ -274,8 +742,8 @@ int bt_ctf_event_serialize(struct bt_ctf_event *event,
                                "event-addr=%p, event-class-name=\"%s\", "
                                "event-class-id=%" PRId64,
                                event,
-                               bt_event_class_common_get_name(event->common.class),
-                               bt_event_class_common_get_id(event->common.class));
+                               bt_ctf_event_class_common_get_name(event->common.class),
+                               bt_ctf_event_class_common_get_id(event->common.class));
                        goto end;
                }
        }
@@ -287,35 +755,35 @@ end:
 BT_HIDDEN
 void _bt_ctf_event_freeze(struct bt_ctf_event *event)
 {
-       _bt_event_common_set_is_frozen(BT_TO_COMMON(event), true);
+       _bt_ctf_event_common_set_is_frozen(BT_CTF_TO_COMMON(event), true);
 }
 
 int bt_ctf_event_set_header(struct bt_ctf_event *event,
                struct bt_ctf_field *header)
 {
        BT_ASSERT_PRE_NON_NULL(event, "Event");
-       BT_ASSERT_PRE_EVENT_COMMON_HOT(BT_TO_COMMON(event), "Event");
+       BT_ASSERT_PRE_EVENT_COMMON_HOT(BT_CTF_TO_COMMON(event), "Event");
 
        /*
         * Ensure the provided header's type matches the one registered to the
         * stream class.
         */
        if (header) {
-               BT_ASSERT_PRE(bt_field_type_common_compare(
-                       ((struct bt_field_common *) header)->type,
-                       bt_event_class_common_borrow_stream_class(event->common.class)->event_header_field_type) == 0,
+               BT_ASSERT_PRE(bt_ctf_field_type_common_compare(
+                       ((struct bt_ctf_field_common *) header)->type,
+                       bt_ctf_event_class_common_borrow_stream_class(event->common.class)->event_header_field_type) == 0,
                        "Header field's type is different from the "
-                       "expected field type: %![event-]+we, %![ft-]+wF, "
-                       "%![expected-ft-]+wF",
-                       event, ((struct bt_field_common *) header)->type,
-                       bt_event_class_common_borrow_stream_class(event->common.class)->event_header_field_type);
+                       "expected field type: event-addr=%p, ft-addr=%p, "
+                       "expected-ft-addr=%p",
+                       event, ((struct bt_ctf_field_common *) header)->type,
+                       bt_ctf_event_class_common_borrow_stream_class(event->common.class)->event_header_field_type);
        } else {
-               BT_ASSERT_PRE(!bt_event_class_common_borrow_stream_class(event->common.class)->event_header_field_type,
+               BT_ASSERT_PRE(!bt_ctf_event_class_common_borrow_stream_class(event->common.class)->event_header_field_type,
                        "Setting no event header field, "
                        "but event header field type is not NULL: ",
-                       "%![event-]+we, %![header-ft-]+wF",
+                       "event-addr=%p, header-ft-addr=%p",
                        event,
-                       bt_event_class_common_borrow_stream_class(event->common.class)->event_header_field_type);
+                       bt_ctf_event_class_common_borrow_stream_class(event->common.class)->event_header_field_type);
        }
 
        bt_put(event->common.header_field->field);
@@ -323,8 +791,8 @@ int bt_ctf_event_set_header(struct bt_ctf_event *event,
        BT_LOGV("Set event's header field: event-addr=%p, "
                "event-class-name=\"%s\", event-class-id=%" PRId64 ", "
                "header-field-addr=%p",
-               event, bt_event_class_common_get_name(event->common.class),
-               bt_event_class_common_get_id(event->common.class), header);
+               event, bt_ctf_event_class_common_get_name(event->common.class),
+               bt_ctf_event_class_common_get_id(event->common.class), header);
        return 0;
 }
 
@@ -332,23 +800,23 @@ int bt_ctf_event_common_set_payload(struct bt_ctf_event *event,
                struct bt_ctf_field *payload)
 {
        BT_ASSERT_PRE_NON_NULL(event, "Event");
-       BT_ASSERT_PRE_EVENT_COMMON_HOT(BT_TO_COMMON(event), "Event");
+       BT_ASSERT_PRE_EVENT_COMMON_HOT(BT_CTF_TO_COMMON(event), "Event");
 
        if (payload) {
-               BT_ASSERT_PRE(bt_field_type_common_compare(
-                       ((struct bt_field_common *) payload)->type,
+               BT_ASSERT_PRE(bt_ctf_field_type_common_compare(
+                       ((struct bt_ctf_field_common *) payload)->type,
                        event->common.class->payload_field_type) == 0,
                        "Payload field's type is different from the "
-                       "expected field type: %![event-]+we, %![ft-]+wF, "
-                       "%![expected-ft-]+wF",
+                       "expected field type: event-addr=%p, ft-addr=%p, "
+                       "expected-ft-addr=%p",
                        event,
-                       ((struct bt_field_common *) payload)->type,
+                       ((struct bt_ctf_field_common *) payload)->type,
                        event->common.class->payload_field_type);
        } else {
                BT_ASSERT_PRE(!event->common.class->payload_field_type,
                        "Setting no event payload field, "
                        "but event payload field type is not NULL: ",
-                       "%![event-]+we, %![payload-ft-]+wF",
+                       "event-addr=%p, payload-ft-addr=%p",
                        event, event->common.class->payload_field_type);
        }
 
@@ -357,8 +825,8 @@ int bt_ctf_event_common_set_payload(struct bt_ctf_event *event,
        BT_LOGV("Set event's payload field: event-addr=%p, "
                "event-class-name=\"%s\", event-class-id=%" PRId64 ", "
                "payload-field-addr=%p",
-               event, bt_event_class_common_get_name(event->common.class),
-               bt_event_class_common_get_id(event->common.class), payload);
+               event, bt_ctf_event_class_common_get_name(event->common.class),
+               bt_ctf_event_class_common_get_id(event->common.class), payload);
        return 0;
 }
 
@@ -366,22 +834,22 @@ int bt_ctf_event_set_context(struct bt_ctf_event *event,
                struct bt_ctf_field *context)
 {
        BT_ASSERT_PRE_NON_NULL(event, "Event");
-       BT_ASSERT_PRE_EVENT_COMMON_HOT(BT_TO_COMMON(event), "Event");
+       BT_ASSERT_PRE_EVENT_COMMON_HOT(BT_CTF_TO_COMMON(event), "Event");
 
        if (context) {
-               BT_ASSERT_PRE(bt_field_type_common_compare(
-                       ((struct bt_field_common *) context)->type,
+               BT_ASSERT_PRE(bt_ctf_field_type_common_compare(
+                       ((struct bt_ctf_field_common *) context)->type,
                        event->common.class->context_field_type) == 0,
                        "Context field's type is different from the "
-                       "expected field type: %![event-]+we, %![ft-]+wF, "
-                       "%![expected-ft-]+wF",
-                       event, ((struct bt_field_common *) context)->type,
+                       "expected field type: event-addr=%p, ft-addr=%p, "
+                       "expected-ft-addr=%p",
+                       event, ((struct bt_ctf_field_common *) context)->type,
                        event->common.class->context_field_type);
        } else {
                BT_ASSERT_PRE(!event->common.class->context_field_type,
                        "Setting no event context field, "
                        "but event context field type is not NULL: ",
-                       "%![event-]+we, %![context-ft-]+wF",
+                       "event-addr=%p, context-ft-addr=%p",
                        event, event->common.class->context_field_type);
        }
 
@@ -390,8 +858,8 @@ int bt_ctf_event_set_context(struct bt_ctf_event *event,
        BT_LOGV("Set event's context field: event-addr=%p, "
                "event-class-name=\"%s\", event-class-id=%" PRId64 ", "
                "context-field-addr=%p",
-               event, bt_event_class_common_get_name(event->common.class),
-               bt_event_class_common_get_id(event->common.class), context);
+               event, bt_ctf_event_class_common_get_name(event->common.class),
+               bt_ctf_event_class_common_get_id(event->common.class), context);
        return 0;
 }
 
@@ -399,25 +867,25 @@ int bt_ctf_event_set_stream_event_context(struct bt_ctf_event *event,
                struct bt_ctf_field *stream_event_context)
 {
        BT_ASSERT_PRE_NON_NULL(event, "Event");
-       BT_ASSERT_PRE_EVENT_COMMON_HOT(BT_TO_COMMON(event), "Event");
+       BT_ASSERT_PRE_EVENT_COMMON_HOT(BT_CTF_TO_COMMON(event), "Event");
 
        if (stream_event_context) {
-               BT_ASSERT_PRE(bt_field_type_common_compare(
-                       ((struct bt_field_common *) stream_event_context)->type,
-                       bt_event_class_common_borrow_stream_class(event->common.class)->event_context_field_type) == 0,
+               BT_ASSERT_PRE(bt_ctf_field_type_common_compare(
+                       ((struct bt_ctf_field_common *) stream_event_context)->type,
+                       bt_ctf_event_class_common_borrow_stream_class(event->common.class)->event_context_field_type) == 0,
                        "Stream event context field's type is different from the "
-                       "expected field type: %![event-]+we, %![ft-]+wF, "
-                       "%![expected-ft-]+wF",
+                       "expected field type: event-addr=%p, ft-addr=%p, "
+                       "expected-ft-addr=%p",
                        event,
-                       ((struct bt_field_common *) stream_event_context)->type,
-                       bt_event_class_common_borrow_stream_class(event->common.class)->event_context_field_type);
+                       ((struct bt_ctf_field_common *) stream_event_context)->type,
+                       bt_ctf_event_class_common_borrow_stream_class(event->common.class)->event_context_field_type);
        } else {
-               BT_ASSERT_PRE(!bt_event_class_common_borrow_stream_class(event->common.class)->event_context_field_type,
+               BT_ASSERT_PRE(!bt_ctf_event_class_common_borrow_stream_class(event->common.class)->event_context_field_type,
                        "Setting no stream event context field, "
                        "but stream event context field type is not NULL: ",
-                       "%![event-]+we, %![context-ft-]+wF",
+                       "event-addr=%p, context-ft-addr=%p",
                        event,
-                       bt_event_class_common_borrow_stream_class(event->common.class)->event_context_field_type);
+                       bt_ctf_event_class_common_borrow_stream_class(event->common.class)->event_context_field_type);
        }
 
        bt_put(event->common.stream_event_context_field);
@@ -425,8 +893,8 @@ int bt_ctf_event_set_stream_event_context(struct bt_ctf_event *event,
        BT_LOGV("Set event's stream event context field: event-addr=%p, "
                "event-class-name=\"%s\", event-class-id=%" PRId64 ", "
                "stream-event-context-field-addr=%p",
-               event, bt_event_class_common_get_name(event->common.class),
-               bt_event_class_common_get_id(event->common.class),
+               event, bt_ctf_event_class_common_get_name(event->common.class),
+               bt_ctf_event_class_common_get_id(event->common.class),
                stream_event_context);
        return 0;
 }
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