X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=plugins%2Ftext%2Fdmesg%2Fdmesg.c;h=b10c94252201c2a040bb22e932ce2475411fd5d9;hb=3fadfbc0c91f82c46bd36e6e0657ea93570c9db1;hp=8cb9539cdbb9bd06d70f2f923964306f7db03d43;hpb=f0010051db62783ef057e8a6b625d6b4444671c2;p=babeltrace.git

diff --git a/plugins/text/dmesg/dmesg.c b/plugins/text/dmesg/dmesg.c
index 8cb9539c..b10c9425 100644
--- a/plugins/text/dmesg/dmesg.c
+++ b/plugins/text/dmesg/dmesg.c
@@ -1,6 +1,6 @@
 /*
  * Copyright 2010-2011 EfficiOS Inc. and Linux Foundation
- * Copyright 2017 Philippe Proulx <jeremie.galarneau@efficios.com>
+ * Copyright 2017 Philippe Proulx <pproulx@efficios.com>
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
@@ -28,11 +28,12 @@
 #include <string.h>
 #include <ctype.h>
 #include <stdio.h>
-#include <babeltrace/assert-internal.h>
-#include <babeltrace/babeltrace.h>
-#include <babeltrace/values-internal.h>
-#include <babeltrace/compat/utc-internal.h>
-#include <babeltrace/compat/stdio-internal.h>
+#include <babeltrace2/assert-internal.h>
+#include <babeltrace2/common-internal.h>
+#include <babeltrace2/babeltrace.h>
+#include <babeltrace2/value-internal.h>
+#include <babeltrace2/compat/utc-internal.h>
+#include <babeltrace2/compat/stdio-internal.h>
 #include <glib.h>
 
 #define NSEC_PER_USEC 1000UL
@@ -42,19 +43,22 @@
 
 struct dmesg_component;
 
-struct dmesg_notif_iter {
+struct dmesg_msg_iter {
 	struct dmesg_component *dmesg_comp;
-	struct bt_private_connection_private_notification_iterator *pc_notif_iter; /* Weak */
+	bt_self_message_iterator *pc_msg_iter; /* Weak */
 	char *linebuf;
 	size_t linebuf_len;
 	FILE *fp;
-	struct bt_notification *tmp_event_notif;
+	bt_message *tmp_event_msg;
+	uint64_t last_clock_value;
 
 	enum {
 		STATE_EMIT_STREAM_BEGINNING,
+		STATE_EMIT_STREAM_ACTIVITY_BEGINNING,
 		STATE_EMIT_PACKET_BEGINNING,
 		STATE_EMIT_EVENT,
 		STATE_EMIT_PACKET_END,
+		STATE_EMIT_STREAM_ACTIVITY_END,
 		STATE_EMIT_STREAM_END,
 		STATE_DONE,
 	} state;
@@ -67,89 +71,39 @@ struct dmesg_component {
 		bt_bool no_timestamp;
 	} params;
 
-	struct bt_trace *trace;
-	struct bt_stream_class *stream_class;
-	struct bt_event_class *event_class;
-	struct bt_stream *stream;
-	struct bt_packet *packet;
-	struct bt_clock_class *clock_class;
-	struct bt_clock_class_priority_map *cc_prio_map;
+	bt_self_component_source *self_comp;
+	bt_trace_class *trace_class;
+	bt_stream_class *stream_class;
+	bt_event_class *event_class;
+	bt_trace *trace;
+	bt_stream *stream;
+	bt_packet *packet;
+	bt_clock_class *clock_class;
 };
 
 static
-struct bt_field_type *create_packet_header_ft(void)
+bt_field_class *create_event_payload_fc(bt_trace_class *trace_class)
 {
-	struct bt_field_type *root_ft = NULL;
-	struct bt_field_type *ft = NULL;
+	bt_field_class *root_fc = NULL;
+	bt_field_class *fc = NULL;
 	int ret;
 
-	root_ft = bt_field_type_structure_create();
-	if (!root_ft) {
-		BT_LOGE_STR("Cannot create an empty structure field type object.");
+	root_fc = bt_field_class_structure_create(trace_class);
+	if (!root_fc) {
+		BT_LOGE_STR("Cannot create an empty structure field class object.");
 		goto error;
 	}
 
-	ft = bt_field_type_integer_create(32);
-	if (!ft) {
-		BT_LOGE_STR("Cannot create an integer field type object.");
+	fc = bt_field_class_string_create(trace_class);
+	if (!fc) {
+		BT_LOGE_STR("Cannot create a string field class object.");
 		goto error;
 	}
 
-	ret = bt_field_type_structure_add_field(root_ft, ft, "magic");
+	ret = bt_field_class_structure_append_member(root_fc,
+		"str", fc);
 	if (ret) {
-		BT_LOGE("Cannot add `magic` field type to structure field type: "
-			"ret=%d", ret);
-		goto error;
-	}
-
-	BT_PUT(ft);
-	ft = bt_field_type_integer_create(8);
-	if (!ft) {
-		BT_LOGE_STR("Cannot create an integer field type object.");
-		goto error;
-	}
-
-	goto end;
-
-error:
-	BT_PUT(root_ft);
-
-end:
-	bt_put(ft);
-	return root_ft;
-}
-
-static
-struct bt_field_type *create_event_header_ft(
-		struct bt_clock_class *clock_class)
-{
-	struct bt_field_type *root_ft = NULL;
-	struct bt_field_type *ft = NULL;
-	int ret;
-
-	root_ft = bt_field_type_structure_create();
-	if (!root_ft) {
-		BT_LOGE_STR("Cannot create an empty structure field type object.");
-		goto error;
-	}
-
-	ft = bt_field_type_integer_create(64);
-	if (!ft) {
-		BT_LOGE_STR("Cannot create an integer field type object.");
-		goto error;
-	}
-
-	ret = bt_field_type_integer_set_mapped_clock_class(ft, clock_class);
-	if (ret) {
-		BT_LOGE("Cannot map integer field type to clock class: "
-			"ret=%d", ret);
-		goto error;
-	}
-
-	ret = bt_field_type_structure_add_field(root_ft,
-		ft, "timestamp");
-	if (ret) {
-		BT_LOGE("Cannot add `timestamp` field type to structure field type: "
+		BT_LOGE("Cannot add `str` member to structure field class: "
 			"ret=%d", ret);
 		goto error;
 	}
@@ -157,167 +111,85 @@ struct bt_field_type *create_event_header_ft(
 	goto end;
 
 error:
-	BT_PUT(root_ft);
+	BT_FIELD_CLASS_PUT_REF_AND_RESET(root_fc);
 
 end:
-	bt_put(ft);
-	return root_ft;
-}
-
-static
-struct bt_field_type *create_event_payload_ft(void)
-{
-	struct bt_field_type *root_ft = NULL;
-	struct bt_field_type *ft = NULL;
-	int ret;
-
-	root_ft = bt_field_type_structure_create();
-	if (!root_ft) {
-		BT_LOGE_STR("Cannot create an empty structure field type object.");
-		goto error;
-	}
-
-	ft = bt_field_type_string_create();
-	if (!ft) {
-		BT_LOGE_STR("Cannot create a string field type object.");
-		goto error;
-	}
-
-	ret = bt_field_type_structure_add_field(root_ft,
-		ft, "str");
-	if (ret) {
-		BT_LOGE("Cannot add `str` field type to structure field type: "
-			"ret=%d", ret);
-		goto error;
-	}
-
-	goto end;
-
-error:
-	BT_PUT(root_ft);
-
-end:
-	bt_put(ft);
-	return root_ft;
-}
-
-static
-struct bt_clock_class *create_clock_class(void)
-{
-	return bt_clock_class_create("the_clock", 1000000000);
+	bt_field_class_put_ref(fc);
+	return root_fc;
 }
 
 static
 int create_meta(struct dmesg_component *dmesg_comp, bool has_ts)
 {
-	struct bt_field_type *ft = NULL;
-	const char *trace_name = NULL;
-	gchar *basename = NULL;
+	bt_field_class *fc = NULL;
 	int ret = 0;
 
-	dmesg_comp->trace = bt_trace_create();
-	if (!dmesg_comp->trace) {
-		BT_LOGE_STR("Cannot create an empty trace object.");
-		goto error;
-	}
-
-	ft = create_packet_header_ft();
-	if (!ft) {
-		BT_LOGE_STR("Cannot create packet header field type.");
+	dmesg_comp->trace_class = bt_trace_class_create(
+		bt_self_component_source_as_self_component(
+			dmesg_comp->self_comp));
+	if (!dmesg_comp->trace_class) {
+		BT_LOGE_STR("Cannot create an empty trace class object.");
 		goto error;
 	}
 
-	ret = bt_trace_set_packet_header_field_type(dmesg_comp->trace, ft);
-	if (ret) {
-		BT_LOGE_STR("Cannot set trace's packet header field type.");
-		goto error;
-	}
-
-	if (dmesg_comp->params.read_from_stdin) {
-		trace_name = "STDIN";
-	} else {
-		basename = g_path_get_basename(dmesg_comp->params.path->str);
-		BT_ASSERT(basename);
-
-		if (strcmp(basename, G_DIR_SEPARATOR_S) != 0 &&
-				strcmp(basename, ".") != 0) {
-			trace_name = basename;
-		}
-	}
-
-	if (trace_name) {
-		ret = bt_trace_set_name(dmesg_comp->trace, trace_name);
-		if (ret) {
-			BT_LOGE("Cannot set trace's name: name=\"%s\"", trace_name);
-			goto error;
-		}
-	}
-
-	dmesg_comp->stream_class = bt_stream_class_create(NULL);
+	dmesg_comp->stream_class = bt_stream_class_create(
+		dmesg_comp->trace_class);
 	if (!dmesg_comp->stream_class) {
-		BT_LOGE_STR("Cannot create an empty stream class object.");
+		BT_LOGE_STR("Cannot create a stream class object.");
 		goto error;
 	}
 
 	if (has_ts) {
-		dmesg_comp->clock_class = create_clock_class();
+		dmesg_comp->clock_class = bt_clock_class_create(
+				bt_self_component_source_as_self_component(
+					dmesg_comp->self_comp));
 		if (!dmesg_comp->clock_class) {
 			BT_LOGE_STR("Cannot create clock class.");
 			goto error;
 		}
 
-		ret = bt_trace_add_clock_class(dmesg_comp->trace,
-			dmesg_comp->clock_class);
-		if (ret) {
-			BT_LOGE_STR("Cannot add clock class to trace.");
-			goto error;
-		}
-
-		bt_put(ft);
-		ft = create_event_header_ft(dmesg_comp->clock_class);
-		if (!ft) {
-			BT_LOGE_STR("Cannot create event header field type.");
-			goto error;
-		}
+		/*
+		 * The `dmesg` timestamp's origin is not the Unix epoch,
+		 * it's the boot time.
+		 */
+		bt_clock_class_set_origin_is_unix_epoch(dmesg_comp->clock_class,
+			BT_FALSE);
 
-		ret = bt_stream_class_set_event_header_field_type(
-			dmesg_comp->stream_class, ft);
+		ret = bt_stream_class_set_default_clock_class(
+			dmesg_comp->stream_class, dmesg_comp->clock_class);
 		if (ret) {
-			BT_LOGE_STR("Cannot set stream class's event header field type.");
+			BT_LOGE_STR("Cannot set stream class's default clock class.");
 			goto error;
 		}
-	}
 
-	dmesg_comp->event_class = bt_event_class_create("string");
-	if (!dmesg_comp->event_class) {
-		BT_LOGE_STR("Cannot create an empty event class object.");
-		goto error;
+		bt_stream_class_set_packets_have_beginning_default_clock_snapshot(
+			dmesg_comp->stream_class, BT_TRUE);
+		bt_stream_class_set_packets_have_end_default_clock_snapshot(
+			dmesg_comp->stream_class, BT_TRUE);
 	}
 
-	bt_put(ft);
-	ft = create_event_payload_ft();
-	if (!ft) {
-		BT_LOGE_STR("Cannot create event payload field type.");
+	dmesg_comp->event_class = bt_event_class_create(
+		dmesg_comp->stream_class);
+	if (!dmesg_comp->event_class) {
+		BT_LOGE_STR("Cannot create an event class object.");
 		goto error;
 	}
 
-	ret = bt_event_class_set_payload_field_type(dmesg_comp->event_class, ft);
+	ret = bt_event_class_set_name(dmesg_comp->event_class, "string");
 	if (ret) {
-		BT_LOGE_STR("Cannot set event class's event payload field type.");
+		BT_LOGE_STR("Cannot set event class's name.");
 		goto error;
 	}
 
-	ret = bt_stream_class_add_event_class(dmesg_comp->stream_class,
-		dmesg_comp->event_class);
-	if (ret) {
-		BT_LOGE("Cannot add event class to stream class: ret=%d", ret);
+	fc = create_event_payload_fc(dmesg_comp->trace_class);
+	if (!fc) {
+		BT_LOGE_STR("Cannot create event payload field class.");
 		goto error;
 	}
 
-	ret = bt_trace_add_stream_class(dmesg_comp->trace,
-		dmesg_comp->stream_class);
+	ret = bt_event_class_set_payload_field_class(dmesg_comp->event_class, fc);
 	if (ret) {
-		BT_LOGE("Cannot add event class to stream class: ret=%d", ret);
+		BT_LOGE_STR("Cannot set event class's event payload field class.");
 		goto error;
 	}
 
@@ -327,40 +199,35 @@ error:
 	ret = -1;
 
 end:
-	bt_put(ft);
-
-	if (basename) {
-		g_free(basename);
-	}
-
+	bt_field_class_put_ref(fc);
 	return ret;
 }
 
 static
-int handle_params(struct dmesg_component *dmesg_comp, struct bt_value *params)
+int handle_params(struct dmesg_component *dmesg_comp,
+		const bt_value *params)
 {
-	struct bt_value *read_from_stdin = NULL;
-	struct bt_value *no_timestamp = NULL;
-	struct bt_value *path = NULL;
+	const bt_value *no_timestamp = NULL;
+	const bt_value *path = NULL;
 	const char *path_str;
 	int ret = 0;
 
-	no_timestamp = bt_value_map_get(params, "no-extract-timestamp");
+	no_timestamp = bt_value_map_borrow_entry_value_const(params,
+		"no-extract-timestamp");
 	if (no_timestamp) {
 		if (!bt_value_is_bool(no_timestamp)) {
 			BT_LOGE("Expecting a boolean value for the `no-extract-timestamp` parameter: "
 				"type=%s",
-				bt_value_type_string(
+				bt_common_value_type_string(
 					bt_value_get_type(no_timestamp)));
 			goto error;
 		}
 
-		ret = bt_value_bool_get(no_timestamp,
-			&dmesg_comp->params.no_timestamp);
-		BT_ASSERT(ret == 0);
+		dmesg_comp->params.no_timestamp =
+			bt_value_bool_get(no_timestamp);
 	}
 
-	path = bt_value_map_get(params, "path");
+	path = bt_value_map_borrow_entry_value_const(params, "path");
 	if (path) {
 		if (dmesg_comp->params.read_from_stdin) {
 			BT_LOGE_STR("Cannot specify both `read-from-stdin` and `path` parameters.");
@@ -370,13 +237,12 @@ int handle_params(struct dmesg_component *dmesg_comp, struct bt_value *params)
 		if (!bt_value_is_string(path)) {
 			BT_LOGE("Expecting a string value for the `path` parameter: "
 				"type=%s",
-				bt_value_type_string(
+				bt_common_value_type_string(
 					bt_value_get_type(path)));
 			goto error;
 		}
 
-		ret = bt_value_string_get(path, &path_str);
-		BT_ASSERT(ret == 0);
+		path_str = bt_value_string_get(path);
 		g_string_assign(dmesg_comp->params.path, path_str);
 	} else {
 		dmesg_comp->params.read_from_stdin = true;
@@ -388,45 +254,45 @@ error:
 	ret = -1;
 
 end:
-	bt_put(read_from_stdin);
-	bt_put(path);
-	bt_put(no_timestamp);
 	return ret;
 }
 
 static
-int fill_packet_header_field(struct bt_packet *packet)
+int create_packet_and_stream_and_trace(struct dmesg_component *dmesg_comp)
 {
-	struct bt_field *ph = NULL;
-	struct bt_field *magic = NULL;
-	int ret;
+	int ret = 0;
+	const char *trace_name = NULL;
+	gchar *basename = NULL;
 
-	ph = bt_packet_borrow_header(packet);
-	BT_ASSERT(ph);
-	magic = bt_field_structure_borrow_field_by_name(ph, "magic");
-	if (!magic) {
-		BT_LOGE_STR("Cannot borrow `magic` field from structure field.");
+	dmesg_comp->trace = bt_trace_create(dmesg_comp->trace_class);
+	if (!dmesg_comp->trace) {
+		BT_LOGE_STR("Cannot create trace object.");
 		goto error;
 	}
 
-	ret = bt_field_integer_unsigned_set_value(magic, 0xc1fc1fc1);
-	BT_ASSERT(ret == 0);
-	goto end;
-
-error:
-	ret = -1;
+	if (dmesg_comp->params.read_from_stdin) {
+		trace_name = "STDIN";
+	} else {
+		basename = g_path_get_basename(dmesg_comp->params.path->str);
+		BT_ASSERT(basename);
 
-end:
-	return ret;
-}
+		if (strcmp(basename, G_DIR_SEPARATOR_S) != 0 &&
+				strcmp(basename, ".") != 0) {
+			trace_name = basename;
+		}
+	}
 
-static
-int create_packet_and_stream(struct dmesg_component *dmesg_comp)
-{
-	int ret = 0;
+	if (trace_name) {
+		ret = bt_trace_set_name(dmesg_comp->trace, trace_name);
+		if (ret) {
+			BT_LOGE("Cannot set trace's name: name=\"%s\"",
+				trace_name);
+			goto error;
+		}
+	}
 
 	dmesg_comp->stream = bt_stream_create(dmesg_comp->stream_class,
-		NULL, 0);
+		dmesg_comp->trace);
 	if (!dmesg_comp->stream) {
 		BT_LOGE_STR("Cannot create stream object.");
 		goto error;
@@ -438,24 +304,16 @@ int create_packet_and_stream(struct dmesg_component *dmesg_comp)
 		goto error;
 	}
 
-	ret = fill_packet_header_field(dmesg_comp->packet);
-	if (ret) {
-		BT_LOGE_STR("Cannot fill packet header field.");
-		goto error;
-	}
-
-	ret = bt_trace_set_is_static(dmesg_comp->trace);
-	if (ret) {
-		BT_LOGE_STR("Cannot make trace static.");
-		goto error;
-	}
-
 	goto end;
 
 error:
 	ret = -1;
 
 end:
+	if (basename) {
+		g_free(basename);
+	}
+
 	return ret;
 }
 
@@ -477,7 +335,7 @@ int try_create_meta_stream_packet(struct dmesg_component *dmesg_comp,
 		goto error;
 	}
 
-	ret = create_packet_and_stream(dmesg_comp);
+	ret = create_packet_and_stream_and_trace(dmesg_comp);
 	if (ret) {
 		BT_LOGE("Cannot create packet and stream objects: "
 			"dmesg-comp-addr=%p", dmesg_comp);
@@ -504,36 +362,39 @@ void destroy_dmesg_component(struct dmesg_component *dmesg_comp)
 		g_string_free(dmesg_comp->params.path, TRUE);
 	}
 
-	bt_put(dmesg_comp->packet);
-	bt_put(dmesg_comp->trace);
-	bt_put(dmesg_comp->stream_class);
-	bt_put(dmesg_comp->event_class);
-	bt_put(dmesg_comp->stream);
-	bt_put(dmesg_comp->clock_class);
-	bt_put(dmesg_comp->cc_prio_map);
+	bt_packet_put_ref(dmesg_comp->packet);
+	bt_trace_put_ref(dmesg_comp->trace);
+	bt_stream_class_put_ref(dmesg_comp->stream_class);
+	bt_event_class_put_ref(dmesg_comp->event_class);
+	bt_stream_put_ref(dmesg_comp->stream);
+	bt_clock_class_put_ref(dmesg_comp->clock_class);
+	bt_trace_class_put_ref(dmesg_comp->trace_class);
 	g_free(dmesg_comp);
 }
 
 static
-enum bt_component_status create_port(struct bt_private_component *priv_comp)
+bt_self_component_status create_port(
+		bt_self_component_source *self_comp)
 {
-	return bt_private_component_source_add_output_private_port(priv_comp,
+	return bt_self_component_source_add_output_port(self_comp,
 		"out", NULL, NULL);
 }
 
 BT_HIDDEN
-enum bt_component_status dmesg_init(struct bt_private_component *priv_comp,
-		struct bt_value *params, void *init_method_data)
+bt_self_component_status dmesg_init(
+		bt_self_component_source *self_comp,
+		bt_value *params, void *init_method_data)
 {
 	int ret = 0;
 	struct dmesg_component *dmesg_comp = g_new0(struct dmesg_component, 1);
-	enum bt_component_status status = BT_COMPONENT_STATUS_OK;
+	bt_self_component_status status = BT_SELF_COMPONENT_STATUS_OK;
 
 	if (!dmesg_comp) {
 		BT_LOGE_STR("Failed to allocate one dmesg component structure.");
 		goto error;
 	}
 
+	dmesg_comp->self_comp = self_comp;
 	dmesg_comp->params.path = g_string_new(NULL);
 	if (!dmesg_comp->params.path) {
 		BT_LOGE_STR("Failed to allocate a GString.");
@@ -542,7 +403,7 @@ enum bt_component_status dmesg_init(struct bt_private_component *priv_comp,
 
 	ret = handle_params(dmesg_comp, params);
 	if (ret) {
-		BT_LOGE("Invalid parameters: comp-addr=%p", priv_comp);
+		BT_LOGE("Invalid parameters: comp-addr=%p", self_comp);
 		goto error;
 	}
 
@@ -550,25 +411,29 @@ enum bt_component_status dmesg_init(struct bt_private_component *priv_comp,
 			!g_file_test(dmesg_comp->params.path->str,
 			G_FILE_TEST_IS_REGULAR)) {
 		BT_LOGE("Input path is not a regular file: "
-			"comp-addr=%p, path=\"%s\"", priv_comp,
+			"comp-addr=%p, path=\"%s\"", self_comp,
 			dmesg_comp->params.path->str);
 		goto error;
 	}
 
-	status = create_port(priv_comp);
-	if (status != BT_COMPONENT_STATUS_OK) {
+	status = create_port(self_comp);
+	if (status != BT_SELF_COMPONENT_STATUS_OK) {
 		goto error;
 	}
 
-	(void) bt_private_component_set_user_data(priv_comp, dmesg_comp);
+	bt_self_component_set_data(
+		bt_self_component_source_as_self_component(self_comp),
+		dmesg_comp);
 	goto end;
 
 error:
 	destroy_dmesg_component(dmesg_comp);
-	(void) bt_private_component_set_user_data(priv_comp, NULL);
+	bt_self_component_set_data(
+		bt_self_component_source_as_self_component(self_comp),
+		NULL);
 
 	if (status >= 0) {
-		status = BT_COMPONENT_STATUS_ERROR;
+		status = BT_SELF_COMPONENT_STATUS_ERROR;
 	}
 
 end:
@@ -576,28 +441,25 @@ end:
 }
 
 BT_HIDDEN
-void dmesg_finalize(struct bt_private_component *priv_comp)
+void dmesg_finalize(bt_self_component_source *self_comp)
 {
-	void *data = bt_private_component_get_user_data(priv_comp);
-
-	destroy_dmesg_component(data);
+	destroy_dmesg_component(bt_self_component_get_data(
+		bt_self_component_source_as_self_component(self_comp)));
 }
 
 static
-struct bt_notification *create_init_event_notif_from_line(
-		struct dmesg_notif_iter *notif_iter,
+bt_message *create_init_event_msg_from_line(
+		struct dmesg_msg_iter *msg_iter,
 		const char *line, const char **new_start)
 {
-	struct bt_event *event;
-	struct bt_notification *notif = NULL;
+	bt_event *event;
+	bt_message *msg = NULL;
 	bool has_timestamp = false;
 	unsigned long sec, usec, msec;
 	unsigned int year, mon, mday, hour, min;
 	uint64_t ts = 0;
-	struct bt_field *eh_field = NULL;
-	struct bt_field *ts_field = NULL;
 	int ret = 0;
-	struct dmesg_component *dmesg_comp = notif_iter->dmesg_comp;
+	struct dmesg_component *dmesg_comp = msg_iter->dmesg_comp;
 
 	*new_start = line;
 
@@ -652,7 +514,7 @@ struct bt_notification *create_init_event_notif_from_line(
 skip_ts:
 	/*
 	 * At this point, we know if the stream class's event header
-	 * field type should have a timestamp or not, so we can lazily
+	 * field class should have a timestamp or not, so we can lazily
 	 * create the metadata, stream, and packet objects.
 	 */
 	ret = try_create_meta_stream_packet(dmesg_comp, has_timestamp);
@@ -661,53 +523,45 @@ skip_ts:
 		goto error;
 	}
 
-	notif = bt_notification_event_create(notif_iter->pc_notif_iter,
-		dmesg_comp->event_class, dmesg_comp->packet);
-	if (!notif) {
-		BT_LOGE_STR("Cannot create event notification.");
-		goto error;
-	}
-
-	event = bt_notification_event_borrow_event(notif);
-	BT_ASSERT(event);
-
 	if (dmesg_comp->clock_class) {
-		ret = bt_event_set_clock_value(event,
-			dmesg_comp->clock_class, ts, BT_TRUE);
-		BT_ASSERT(ret == 0);
-		eh_field = bt_event_borrow_header(event);
-		BT_ASSERT(eh_field);
-		ts_field = bt_field_structure_borrow_field_by_name(eh_field,
-			"timestamp");
-		if (!ts_field) {
-			BT_LOGE_STR("Cannot borrow `timestamp` field from event header structure field.");
-			goto error;
-		}
+		msg = bt_message_event_create_with_default_clock_snapshot(
+			msg_iter->pc_msg_iter,
+			dmesg_comp->event_class, dmesg_comp->packet, ts);
+		msg_iter->last_clock_value = ts;
+	} else {
+		msg = bt_message_event_create(msg_iter->pc_msg_iter,
+			dmesg_comp->event_class, dmesg_comp->packet);
+	}
 
-		ret = bt_field_integer_unsigned_set_value(ts_field, ts);
-		BT_ASSERT(ret == 0);
+	if (!msg) {
+		BT_LOGE_STR("Cannot create event message.");
+		goto error;
 	}
 
+	event = bt_message_event_borrow_event(msg);
+	BT_ASSERT(event);
 	goto end;
 
 error:
-	BT_PUT(notif);
+	BT_MESSAGE_PUT_REF_AND_RESET(msg);
 
 end:
-	return notif;
+	return msg;
 }
 
 static
-int fill_event_payload_from_line(const char *line, struct bt_event *event)
+int fill_event_payload_from_line(const char *line,
+		bt_event *event)
 {
-	struct bt_field *ep_field = NULL;
-	struct bt_field *str_field = NULL;
+	bt_field *ep_field = NULL;
+	bt_field *str_field = NULL;
 	size_t len;
 	int ret;
 
-	ep_field = bt_event_borrow_payload(event);
+	ep_field = bt_event_borrow_payload_field(event);
 	BT_ASSERT(ep_field);
-	str_field = bt_field_structure_borrow_field_by_name(ep_field, "str");
+	str_field = bt_field_structure_borrow_member_field_by_index(
+		ep_field, 0);
 	if (!str_field) {
 		BT_LOGE_STR("Cannot borrow `timestamp` field from event payload structure field.");
 		goto error;
@@ -725,7 +579,7 @@ int fill_event_payload_from_line(const char *line, struct bt_event *event)
 		goto error;
 	}
 
-	ret = bt_field_string_append_len(str_field, line, len);
+	ret = bt_field_string_append_with_length(str_field, line, len);
 	if (ret) {
 		BT_LOGE("Cannot append value to string field object: "
 			"len=%zu", len);
@@ -742,22 +596,22 @@ end:
 }
 
 static
-struct bt_notification *create_notif_from_line(
-		struct dmesg_notif_iter *dmesg_notif_iter, const char *line)
+bt_message *create_msg_from_line(
+		struct dmesg_msg_iter *dmesg_msg_iter, const char *line)
 {
-	struct bt_event *event = NULL;
-	struct bt_notification *notif = NULL;
+	bt_event *event = NULL;
+	bt_message *msg = NULL;
 	const char *new_start;
 	int ret;
 
-	notif = create_init_event_notif_from_line(dmesg_notif_iter,
+	msg = create_init_event_msg_from_line(dmesg_msg_iter,
 		line, &new_start);
-	if (!notif) {
-		BT_LOGE_STR("Cannot create and initialize event notification from line.");
+	if (!msg) {
+		BT_LOGE_STR("Cannot create and initialize event message from line.");
 		goto error;
 	}
 
-	event = bt_notification_event_borrow_event(notif);
+	event = bt_message_event_borrow_event(msg);
 	BT_ASSERT(event);
 	ret = fill_event_payload_from_line(new_start, event);
 	if (ret) {
@@ -769,113 +623,112 @@ struct bt_notification *create_notif_from_line(
 	goto end;
 
 error:
-	BT_PUT(notif);
+	BT_MESSAGE_PUT_REF_AND_RESET(msg);
 
 end:
-	return notif;
+	return msg;
 }
 
 static
-void destroy_dmesg_notif_iter(struct dmesg_notif_iter *dmesg_notif_iter)
+void destroy_dmesg_msg_iter(struct dmesg_msg_iter *dmesg_msg_iter)
 {
-	if (!dmesg_notif_iter) {
+	if (!dmesg_msg_iter) {
 		return;
 	}
 
-	if (dmesg_notif_iter->fp && dmesg_notif_iter->fp != stdin) {
-		if (fclose(dmesg_notif_iter->fp)) {
+	if (dmesg_msg_iter->fp && dmesg_msg_iter->fp != stdin) {
+		if (fclose(dmesg_msg_iter->fp)) {
 			BT_LOGE_ERRNO("Cannot close input file", ".");
 		}
 	}
 
-	bt_put(dmesg_notif_iter->tmp_event_notif);
-	free(dmesg_notif_iter->linebuf);
-	g_free(dmesg_notif_iter);
+	bt_message_put_ref(dmesg_msg_iter->tmp_event_msg);
+	free(dmesg_msg_iter->linebuf);
+	g_free(dmesg_msg_iter);
 }
 
+
+
 BT_HIDDEN
-enum bt_notification_iterator_status dmesg_notif_iter_init(
-		struct bt_private_connection_private_notification_iterator *priv_notif_iter,
-		struct bt_private_port *priv_port)
+bt_self_message_iterator_status dmesg_msg_iter_init(
+		bt_self_message_iterator *self_msg_iter,
+		bt_self_component_source *self_comp,
+		bt_self_component_port_output *self_port)
 {
-	struct bt_private_component *priv_comp = NULL;
 	struct dmesg_component *dmesg_comp;
-	struct dmesg_notif_iter *dmesg_notif_iter =
-		g_new0(struct dmesg_notif_iter, 1);
-	enum bt_notification_iterator_status status =
-		BT_NOTIFICATION_ITERATOR_STATUS_OK;
+	struct dmesg_msg_iter *dmesg_msg_iter =
+		g_new0(struct dmesg_msg_iter, 1);
+	bt_self_message_iterator_status status =
+		BT_SELF_MESSAGE_ITERATOR_STATUS_OK;
 
-	if (!dmesg_notif_iter) {
-		BT_LOGE_STR("Failed to allocate on dmesg notification iterator structure.");
+	if (!dmesg_msg_iter) {
+		BT_LOGE_STR("Failed to allocate on dmesg message iterator structure.");
 		goto error;
 	}
 
-	priv_comp = bt_private_connection_private_notification_iterator_get_private_component(
-		priv_notif_iter);
-	BT_ASSERT(priv_comp);
-	dmesg_comp = bt_private_component_get_user_data(priv_comp);
+	dmesg_comp = bt_self_component_get_data(
+		bt_self_component_source_as_self_component(self_comp));
 	BT_ASSERT(dmesg_comp);
-	dmesg_notif_iter->dmesg_comp = dmesg_comp;
-	dmesg_notif_iter->pc_notif_iter = priv_notif_iter;
+	dmesg_msg_iter->dmesg_comp = dmesg_comp;
+	dmesg_msg_iter->pc_msg_iter = self_msg_iter;
 
 	if (dmesg_comp->params.read_from_stdin) {
-		dmesg_notif_iter->fp = stdin;
+		dmesg_msg_iter->fp = stdin;
 	} else {
-		dmesg_notif_iter->fp = fopen(dmesg_comp->params.path->str, "r");
-		if (!dmesg_notif_iter->fp) {
+		dmesg_msg_iter->fp = fopen(dmesg_comp->params.path->str, "r");
+		if (!dmesg_msg_iter->fp) {
 			BT_LOGE_ERRNO("Cannot open input file in read mode", ": path=\"%s\"",
 				dmesg_comp->params.path->str);
 			goto error;
 		}
 	}
 
-	(void) bt_private_connection_private_notification_iterator_set_user_data(priv_notif_iter,
-		dmesg_notif_iter);
+	bt_self_message_iterator_set_data(self_msg_iter,
+		dmesg_msg_iter);
 	goto end;
 
 error:
-	destroy_dmesg_notif_iter(dmesg_notif_iter);
-	(void) bt_private_connection_private_notification_iterator_set_user_data(priv_notif_iter,
-		NULL);
+	destroy_dmesg_msg_iter(dmesg_msg_iter);
+	bt_self_message_iterator_set_data(self_msg_iter, NULL);
 	if (status >= 0) {
-		status = BT_NOTIFICATION_ITERATOR_STATUS_ERROR;
+		status = BT_SELF_MESSAGE_ITERATOR_STATUS_ERROR;
 	}
 
 end:
-	bt_put(priv_comp);
 	return status;
 }
 
 BT_HIDDEN
-void dmesg_notif_iter_finalize(
-		struct bt_private_connection_private_notification_iterator *priv_notif_iter)
+void dmesg_msg_iter_finalize(
+		bt_self_message_iterator *priv_msg_iter)
 {
-	destroy_dmesg_notif_iter(bt_private_connection_private_notification_iterator_get_user_data(
-		priv_notif_iter));
+	destroy_dmesg_msg_iter(bt_self_message_iterator_get_data(
+		priv_msg_iter));
 }
 
 static
-enum bt_notification_iterator_status dmesg_notif_iter_next_one(
-		struct dmesg_notif_iter *dmesg_notif_iter,
-		struct bt_notification **notif)
+bt_self_message_iterator_status dmesg_msg_iter_next_one(
+		struct dmesg_msg_iter *dmesg_msg_iter,
+		bt_message **msg)
 {
 	ssize_t len;
 	struct dmesg_component *dmesg_comp;
-	enum bt_notification_iterator_status status =
-		BT_NOTIFICATION_ITERATOR_STATUS_OK;
+	bt_self_message_iterator_status status =
+		BT_SELF_MESSAGE_ITERATOR_STATUS_OK;
 
-	BT_ASSERT(dmesg_notif_iter);
-	dmesg_comp = dmesg_notif_iter->dmesg_comp;
+	BT_ASSERT(dmesg_msg_iter);
+	dmesg_comp = dmesg_msg_iter->dmesg_comp;
 	BT_ASSERT(dmesg_comp);
 
-	if (dmesg_notif_iter->state == STATE_DONE) {
-		status = BT_NOTIFICATION_ITERATOR_STATUS_END;
+	if (dmesg_msg_iter->state == STATE_DONE) {
+		status = BT_SELF_MESSAGE_ITERATOR_STATUS_END;
 		goto end;
 	}
 
-	if (dmesg_notif_iter->tmp_event_notif ||
-			dmesg_notif_iter->state == STATE_EMIT_PACKET_END ||
-			dmesg_notif_iter->state == STATE_EMIT_STREAM_END) {
+	if (dmesg_msg_iter->tmp_event_msg ||
+			dmesg_msg_iter->state == STATE_EMIT_PACKET_END ||
+			dmesg_msg_iter->state == STATE_EMIT_STREAM_ACTIVITY_END ||
+			dmesg_msg_iter->state == STATE_EMIT_STREAM_END) {
 		goto handle_state;
 	}
 
@@ -883,22 +736,22 @@ enum bt_notification_iterator_status dmesg_notif_iter_next_one(
 		const char *ch;
 		bool only_spaces = true;
 
-		len = bt_getline(&dmesg_notif_iter->linebuf,
-			&dmesg_notif_iter->linebuf_len, dmesg_notif_iter->fp);
+		len = bt_getline(&dmesg_msg_iter->linebuf,
+			&dmesg_msg_iter->linebuf_len, dmesg_msg_iter->fp);
 		if (len < 0) {
 			if (errno == EINVAL) {
-				status = BT_NOTIFICATION_ITERATOR_STATUS_ERROR;
+				status = BT_SELF_MESSAGE_ITERATOR_STATUS_ERROR;
 			} else if (errno == ENOMEM) {
 				status =
-					BT_NOTIFICATION_ITERATOR_STATUS_NOMEM;
+					BT_SELF_MESSAGE_ITERATOR_STATUS_NOMEM;
 			} else {
-				if (dmesg_notif_iter->state == STATE_EMIT_STREAM_BEGINNING) {
+				if (dmesg_msg_iter->state == STATE_EMIT_STREAM_BEGINNING) {
 					/* Stream did not even begin */
-					status = BT_NOTIFICATION_ITERATOR_STATUS_END;
+					status = BT_SELF_MESSAGE_ITERATOR_STATUS_END;
 					goto end;
 				} else {
 					/* End current packet now */
-					dmesg_notif_iter->state =
+					dmesg_msg_iter->state =
 						STATE_EMIT_PACKET_END;
 					goto handle_state;
 				}
@@ -907,10 +760,10 @@ enum bt_notification_iterator_status dmesg_notif_iter_next_one(
 			goto end;
 		}
 
-		BT_ASSERT(dmesg_notif_iter->linebuf);
+		BT_ASSERT(dmesg_msg_iter->linebuf);
 
 		/* Ignore empty lines, once trimmed */
-		for (ch = dmesg_notif_iter->linebuf; *ch != '\0'; ch++) {
+		for (ch = dmesg_msg_iter->linebuf; *ch != '\0'; ch++) {
 			if (!isspace(*ch)) {
 				only_spaces = false;
 				break;
@@ -922,54 +775,80 @@ enum bt_notification_iterator_status dmesg_notif_iter_next_one(
 		}
 	}
 
-	dmesg_notif_iter->tmp_event_notif = create_notif_from_line(
-		dmesg_notif_iter, dmesg_notif_iter->linebuf);
-	if (!dmesg_notif_iter->tmp_event_notif) {
-		BT_LOGE("Cannot create event notification from line: "
+	dmesg_msg_iter->tmp_event_msg = create_msg_from_line(
+		dmesg_msg_iter, dmesg_msg_iter->linebuf);
+	if (!dmesg_msg_iter->tmp_event_msg) {
+		BT_LOGE("Cannot create event message from line: "
 			"dmesg-comp-addr=%p, line=\"%s\"", dmesg_comp,
-			dmesg_notif_iter->linebuf);
+			dmesg_msg_iter->linebuf);
 		goto end;
 	}
 
 handle_state:
 	BT_ASSERT(dmesg_comp->trace);
 
-	switch (dmesg_notif_iter->state) {
+	switch (dmesg_msg_iter->state) {
 	case STATE_EMIT_STREAM_BEGINNING:
-		BT_ASSERT(dmesg_notif_iter->tmp_event_notif);
-		*notif = bt_notification_stream_begin_create(
-			dmesg_notif_iter->pc_notif_iter, dmesg_comp->stream);
-		dmesg_notif_iter->state = STATE_EMIT_PACKET_BEGINNING;
+		BT_ASSERT(dmesg_msg_iter->tmp_event_msg);
+		*msg = bt_message_stream_beginning_create(
+			dmesg_msg_iter->pc_msg_iter, dmesg_comp->stream);
+		dmesg_msg_iter->state = STATE_EMIT_STREAM_ACTIVITY_BEGINNING;
+		break;
+	case STATE_EMIT_STREAM_ACTIVITY_BEGINNING:
+		BT_ASSERT(dmesg_msg_iter->tmp_event_msg);
+		*msg = bt_message_stream_activity_beginning_create(
+			dmesg_msg_iter->pc_msg_iter, dmesg_comp->stream);
+		dmesg_msg_iter->state = STATE_EMIT_PACKET_BEGINNING;
 		break;
 	case STATE_EMIT_PACKET_BEGINNING:
-		BT_ASSERT(dmesg_notif_iter->tmp_event_notif);
-		*notif = bt_notification_packet_begin_create(
-			dmesg_notif_iter->pc_notif_iter, dmesg_comp->packet);
-		dmesg_notif_iter->state = STATE_EMIT_EVENT;
+		BT_ASSERT(dmesg_msg_iter->tmp_event_msg);
+
+		if (dmesg_comp->clock_class) {
+			*msg = bt_message_packet_beginning_create_with_default_clock_snapshot(
+				dmesg_msg_iter->pc_msg_iter, dmesg_comp->packet,
+				dmesg_msg_iter->last_clock_value);
+		} else {
+			*msg = bt_message_packet_beginning_create(
+				dmesg_msg_iter->pc_msg_iter, dmesg_comp->packet);
+		}
+
+		dmesg_msg_iter->state = STATE_EMIT_EVENT;
 		break;
 	case STATE_EMIT_EVENT:
-		BT_ASSERT(dmesg_notif_iter->tmp_event_notif);
-		*notif = dmesg_notif_iter->tmp_event_notif;
-		dmesg_notif_iter->tmp_event_notif = NULL;
+		BT_ASSERT(dmesg_msg_iter->tmp_event_msg);
+		*msg = dmesg_msg_iter->tmp_event_msg;
+		dmesg_msg_iter->tmp_event_msg = NULL;
 		break;
 	case STATE_EMIT_PACKET_END:
-		*notif = bt_notification_packet_end_create(
-			dmesg_notif_iter->pc_notif_iter, dmesg_comp->packet);
-		dmesg_notif_iter->state = STATE_EMIT_STREAM_END;
+		if (dmesg_comp->clock_class) {
+			*msg = bt_message_packet_end_create_with_default_clock_snapshot(
+				dmesg_msg_iter->pc_msg_iter, dmesg_comp->packet,
+				dmesg_msg_iter->last_clock_value);
+		} else {
+			*msg = bt_message_packet_end_create(
+				dmesg_msg_iter->pc_msg_iter, dmesg_comp->packet);
+		}
+
+		dmesg_msg_iter->state = STATE_EMIT_STREAM_ACTIVITY_END;
+		break;
+	case STATE_EMIT_STREAM_ACTIVITY_END:
+		*msg = bt_message_stream_activity_end_create(
+			dmesg_msg_iter->pc_msg_iter, dmesg_comp->stream);
+		dmesg_msg_iter->state = STATE_EMIT_STREAM_END;
 		break;
 	case STATE_EMIT_STREAM_END:
-		*notif = bt_notification_stream_end_create(
-			dmesg_notif_iter->pc_notif_iter, dmesg_comp->stream);
-		dmesg_notif_iter->state = STATE_DONE;
+		*msg = bt_message_stream_end_create(
+			dmesg_msg_iter->pc_msg_iter, dmesg_comp->stream);
+		dmesg_msg_iter->state = STATE_DONE;
 		break;
 	default:
 		break;
 	}
 
-	if (!*notif) {
-		BT_LOGE("Cannot create notification: dmesg-comp-addr=%p",
+	if (!*msg) {
+		BT_LOGE("Cannot create message: dmesg-comp-addr=%p",
 			dmesg_comp);
-		status = BT_NOTIFICATION_ITERATOR_STATUS_ERROR;
+		status = BT_SELF_MESSAGE_ITERATOR_STATUS_ERROR;
 	}
 
 end:
@@ -977,41 +856,72 @@ end:
 }
 
 BT_HIDDEN
-enum bt_notification_iterator_status dmesg_notif_iter_next(
-		struct bt_private_connection_private_notification_iterator *priv_notif_iter,
-		bt_notification_array notifs, uint64_t capacity,
+bt_self_message_iterator_status dmesg_msg_iter_next(
+		bt_self_message_iterator *self_msg_iter,
+		bt_message_array_const msgs, uint64_t capacity,
 		uint64_t *count)
 {
-	struct dmesg_notif_iter *dmesg_notif_iter =
-		bt_private_connection_private_notification_iterator_get_user_data(
-			priv_notif_iter);
-	enum bt_notification_iterator_status status =
-		BT_NOTIFICATION_ITERATOR_STATUS_OK;
+	struct dmesg_msg_iter *dmesg_msg_iter =
+		bt_self_message_iterator_get_data(
+			self_msg_iter);
+	bt_self_message_iterator_status status =
+		BT_SELF_MESSAGE_ITERATOR_STATUS_OK;
 	uint64_t i = 0;
 
-	while (i < capacity && status == BT_NOTIFICATION_ITERATOR_STATUS_OK) {
-		status = dmesg_notif_iter_next_one(dmesg_notif_iter, &notifs[i]);
-		if (status == BT_NOTIFICATION_ITERATOR_STATUS_OK) {
+	while (i < capacity &&
+			status == BT_SELF_MESSAGE_ITERATOR_STATUS_OK) {
+		bt_message *priv_msg = NULL;
+
+		status = dmesg_msg_iter_next_one(dmesg_msg_iter,
+			&priv_msg);
+		msgs[i] = priv_msg;
+		if (status == BT_SELF_MESSAGE_ITERATOR_STATUS_OK) {
 			i++;
 		}
 	}
 
 	if (i > 0) {
 		/*
-		 * Even if dmesg_notif_iter_next_one() returned
+		 * Even if dmesg_msg_iter_next_one() returned
 		 * something else than
-		 * BT_NOTIFICATION_ITERATOR_STATUS_OK, we accumulated
-		 * notification objects in the output notification
-		 * array, so we need to return
-		 * BT_NOTIFICATION_ITERATOR_STATUS_OK so that they are
-		 * transfered to downstream. This other status occurs
-		 * again the next time muxer_notif_iter_do_next() is
-		 * called, possibly without any accumulated
-		 * notification, in which case we'll return it.
+		 * BT_SELF_MESSAGE_ITERATOR_STATUS_OK, we
+		 * accumulated message objects in the output
+		 * message array, so we need to return
+		 * BT_SELF_MESSAGE_ITERATOR_STATUS_OK so that they
+		 * are transfered to downstream. This other status
+		 * occurs again the next time muxer_msg_iter_do_next()
+		 * is called, possibly without any accumulated
+		 * message, in which case we'll return it.
 		 */
 		*count = i;
-		status = BT_NOTIFICATION_ITERATOR_STATUS_OK;
+		status = BT_SELF_MESSAGE_ITERATOR_STATUS_OK;
 	}
 
 	return status;
 }
+
+BT_HIDDEN
+bt_bool dmesg_msg_iter_can_seek_beginning(
+		bt_self_message_iterator *self_msg_iter)
+{
+	struct dmesg_msg_iter *dmesg_msg_iter =
+		bt_self_message_iterator_get_data(self_msg_iter);
+
+	/* Can't seek the beginning of the standard input stream */
+	return !dmesg_msg_iter->dmesg_comp->params.read_from_stdin;
+}
+
+BT_HIDDEN
+bt_self_message_iterator_status dmesg_msg_iter_seek_beginning(
+		bt_self_message_iterator *self_msg_iter)
+{
+	struct dmesg_msg_iter *dmesg_msg_iter =
+		bt_self_message_iterator_get_data(self_msg_iter);
+
+	BT_ASSERT(!dmesg_msg_iter->dmesg_comp->params.read_from_stdin);
+
+	BT_MESSAGE_PUT_REF_AND_RESET(dmesg_msg_iter->tmp_event_msg);
+	dmesg_msg_iter->last_clock_value = 0;
+	dmesg_msg_iter->state = STATE_EMIT_STREAM_BEGINNING;
+	return BT_SELF_MESSAGE_ITERATOR_STATUS_OK;
+}