STATE_DSCOPE_STREAM_PACKET_CONTEXT_BEGIN,
STATE_DSCOPE_STREAM_PACKET_CONTEXT_CONTINUE,
STATE_AFTER_STREAM_PACKET_CONTEXT,
+ STATE_CHECK_EMIT_MSG_STREAM_BEGINNING,
STATE_EMIT_MSG_STREAM_BEGINNING,
STATE_EMIT_MSG_STREAM_ACTIVITY_BEGINNING,
+ STATE_CHECK_EMIT_MSG_DISCARDED_EVENTS,
+ STATE_CHECK_EMIT_MSG_DISCARDED_PACKETS,
+ STATE_EMIT_MSG_DISCARDED_EVENTS,
+ STATE_EMIT_MSG_DISCARDED_PACKETS,
STATE_EMIT_MSG_PACKET_BEGINNING,
STATE_DSCOPE_EVENT_HEADER_BEGIN,
STATE_DSCOPE_EVENT_HEADER_CONTINUE,
STATE_SKIP_PACKET_PADDING,
STATE_EMIT_MSG_PACKET_END_MULTI,
STATE_EMIT_MSG_PACKET_END_SINGLE,
+ STATE_CHECK_EMIT_MSG_STREAM_ACTIVITY_END,
STATE_EMIT_MSG_STREAM_ACTIVITY_END,
STATE_EMIT_MSG_STREAM_END,
STATE_DONE,
};
+struct end_of_packet_snapshots {
+ uint64_t discarded_events;
+ uint64_t packets;
+ uint64_t beginning_clock;
+ uint64_t end_clock;
+};
+
/* CTF message iterator */
struct bt_msg_iter {
/* Visit stack */
*/
bool emit_stream_begin_msg;
- /*
- * True to emit stream end and stream activity end messages.
- */
+ /* True to emit stream end and stream activity end messages */
bool emit_stream_end_msg;
+ /* True to set the stream */
+ bool set_stream;
+
/*
* Current dynamic scope field pointer.
*
/* Default clock's current value */
uint64_t default_clock_snapshot;
- /* End of packet snapshots */
- struct {
- uint64_t discarded_events;
- uint64_t packets;
- uint64_t beginning_clock;
- uint64_t end_clock;
- } snapshots;
+ /* End of current packet snapshots */
+ struct end_of_packet_snapshots snapshots;
+
+ /* End of previous packet snapshots */
+ struct end_of_packet_snapshots prev_packet_snapshots;
/* Stored values (for sequence lengths, variant tags) */
GArray *stored_values;
return "STATE_EMIT_MSG_STREAM_ACTIVITY_BEGINNING";
case STATE_EMIT_MSG_PACKET_BEGINNING:
return "STATE_EMIT_MSG_PACKET_BEGINNING";
+ case STATE_EMIT_MSG_DISCARDED_EVENTS:
+ return "STATE_EMIT_MSG_DISCARDED_EVENTS";
+ case STATE_EMIT_MSG_DISCARDED_PACKETS:
+ return "STATE_EMIT_MSG_DISCARDED_PACKETS";
case STATE_DSCOPE_EVENT_HEADER_BEGIN:
return "STATE_DSCOPE_EVENT_HEADER_BEGIN";
case STATE_DSCOPE_EVENT_HEADER_CONTINUE:
break;
case BT_MSG_ITER_STATUS_EOF:
ret = BT_MSG_ITER_STATUS_OK;
- notit->state = STATE_EMIT_MSG_STREAM_ACTIVITY_END;
+ notit->state = STATE_CHECK_EMIT_MSG_STREAM_ACTIVITY_END;
goto end;
default:
goto end;
* least one packet beginning message, so the initial
* stream beginning message was also emitted.
*/
- notit->state = STATE_EMIT_MSG_PACKET_BEGINNING;
+ notit->state = STATE_CHECK_EMIT_MSG_DISCARDED_EVENTS;
} else {
- notit->state = STATE_EMIT_MSG_STREAM_BEGINNING;
+ notit->state = STATE_CHECK_EMIT_MSG_STREAM_BEGINNING;
}
end:
return status;
}
+static
+enum bt_msg_iter_status check_emit_msg_stream_beginning_state(
+ struct bt_msg_iter *notit)
+{
+ enum bt_msg_iter_status status = BT_MSG_ITER_STATUS_OK;
+
+ if (notit->set_stream) {
+ status = set_current_stream(notit);
+ if (status != BT_MSG_ITER_STATUS_OK) {
+ goto end;
+ }
+ }
+
+ if (notit->emit_stream_begin_msg) {
+ notit->state = STATE_EMIT_MSG_STREAM_BEGINNING;
+ } else {
+ /* Stream's first packet */
+ notit->state = STATE_CHECK_EMIT_MSG_DISCARDED_EVENTS;
+ }
+
+end:
+ return status;
+}
+
+static
+enum bt_msg_iter_status check_emit_msg_discarded_events(
+ struct bt_msg_iter *notit)
+{
+ notit->state = STATE_EMIT_MSG_DISCARDED_EVENTS;
+
+ if (notit->prev_packet_snapshots.discarded_events == UINT64_C(-1)) {
+ if (notit->snapshots.discarded_events == 0 ||
+ notit->snapshots.discarded_events == UINT64_C(-1)) {
+ /*
+ * Stream's first packet with no discarded
+ * events or no information about discarded
+ * events: do not emit.
+ */
+ notit->state = STATE_CHECK_EMIT_MSG_DISCARDED_PACKETS;
+ }
+ } else {
+ /*
+ * If the previous packet has a value for this counter,
+ * then this counter is defined for the whole stream.
+ */
+ BT_ASSERT(notit->snapshots.discarded_events != UINT64_C(-1));
+
+ if (notit->snapshots.discarded_events -
+ notit->prev_packet_snapshots.discarded_events == 0) {
+ /*
+ * No discarded events since previous packet: do
+ * not emit.
+ */
+ notit->state = STATE_CHECK_EMIT_MSG_DISCARDED_PACKETS;
+ }
+ }
+
+ return BT_MSG_ITER_STATUS_OK;
+}
+
+static
+enum bt_msg_iter_status check_emit_msg_discarded_packets(
+ struct bt_msg_iter *notit)
+{
+ notit->state = STATE_EMIT_MSG_DISCARDED_PACKETS;
+
+ if (notit->prev_packet_snapshots.packets == UINT64_C(-1)) {
+ /*
+ * Stream's first packet or no information about
+ * discarded packets: do not emit. In other words, if
+ * this is the first packet and its sequence number is
+ * not 0, do not consider that packets were previously
+ * lost: we might be reading a partial stream (LTTng
+ * snapshot for example).
+ */
+ notit->state = STATE_EMIT_MSG_PACKET_BEGINNING;
+ } else {
+ /*
+ * If the previous packet has a value for this counter,
+ * then this counter is defined for the whole stream.
+ */
+ BT_ASSERT(notit->snapshots.packets != UINT64_C(-1));
+
+ if (notit->snapshots.packets -
+ notit->prev_packet_snapshots.packets <= 1) {
+ /*
+ * No discarded packets since previous packet:
+ * do not emit.
+ */
+ notit->state = STATE_EMIT_MSG_PACKET_BEGINNING;
+ }
+ }
+
+ return BT_MSG_ITER_STATUS_OK;
+}
+
+static
+enum bt_msg_iter_status check_emit_msg_stream_activity_end(
+ struct bt_msg_iter *notit)
+{
+ if (notit->emit_stream_end_msg) {
+ notit->state = STATE_EMIT_MSG_STREAM_ACTIVITY_END;
+ } else {
+ notit->state = STATE_DONE;
+ }
+
+ return BT_MSG_ITER_STATUS_OK;
+}
+
static inline
enum bt_msg_iter_status handle_state(struct bt_msg_iter *notit)
{
case STATE_AFTER_STREAM_PACKET_CONTEXT:
status = after_packet_context_state(notit);
break;
+ case STATE_CHECK_EMIT_MSG_STREAM_BEGINNING:
+ status = check_emit_msg_stream_beginning_state(notit);
+ break;
case STATE_EMIT_MSG_STREAM_BEGINNING:
notit->state = STATE_EMIT_MSG_STREAM_ACTIVITY_BEGINNING;
break;
case STATE_EMIT_MSG_STREAM_ACTIVITY_BEGINNING:
+ notit->state = STATE_CHECK_EMIT_MSG_DISCARDED_EVENTS;
+ break;
+ case STATE_CHECK_EMIT_MSG_DISCARDED_EVENTS:
+ status = check_emit_msg_discarded_events(notit);
+ break;
+ case STATE_EMIT_MSG_DISCARDED_EVENTS:
+ notit->state = STATE_CHECK_EMIT_MSG_DISCARDED_PACKETS;
+ break;
+ case STATE_CHECK_EMIT_MSG_DISCARDED_PACKETS:
+ status = check_emit_msg_discarded_packets(notit);
+ break;
+ case STATE_EMIT_MSG_DISCARDED_PACKETS:
notit->state = STATE_EMIT_MSG_PACKET_BEGINNING;
break;
case STATE_EMIT_MSG_PACKET_BEGINNING:
notit->state = STATE_SKIP_PACKET_PADDING;
break;
case STATE_EMIT_MSG_PACKET_END_SINGLE:
- notit->state = STATE_EMIT_MSG_STREAM_ACTIVITY_END;
+ notit->state = STATE_CHECK_EMIT_MSG_STREAM_ACTIVITY_END;
+ break;
+ case STATE_CHECK_EMIT_MSG_STREAM_ACTIVITY_END:
+ status = check_emit_msg_stream_activity_end(notit);
break;
case STATE_EMIT_MSG_STREAM_ACTIVITY_END:
notit->state = STATE_EMIT_MSG_STREAM_END;
return status;
}
-/**
- * Resets the internal state of a CTF message iterator.
- */
BT_HIDDEN
-void bt_msg_iter_reset(struct bt_msg_iter *notit)
+void bt_msg_iter_reset_for_next_stream_file(struct bt_msg_iter *notit)
{
BT_ASSERT(notit);
BT_LOGD("Resetting message iterator: addr=%p", notit);
notit->cur_exp_packet_content_size = -1;
notit->cur_exp_packet_total_size = -1;
notit->cur_packet_offset = -1;
- notit->cur_stream_class_id = -1;
notit->cur_event_class_id = -1;
+ notit->snapshots.beginning_clock = UINT64_C(-1);
+ notit->snapshots.end_clock = UINT64_C(-1);
+}
+
+/**
+ * Resets the internal state of a CTF message iterator.
+ */
+BT_HIDDEN
+void bt_msg_iter_reset(struct bt_msg_iter *notit)
+{
+ bt_msg_iter_reset_for_next_stream_file(notit);
+ notit->cur_stream_class_id = -1;
notit->cur_data_stream_id = -1;
notit->emit_stream_begin_msg = true;
notit->emit_stream_end_msg = true;
+ notit->snapshots.discarded_events = UINT64_C(-1);
+ notit->snapshots.packets = UINT64_C(-1);
+ notit->prev_packet_snapshots.discarded_events = UINT64_C(-1);
+ notit->prev_packet_snapshots.packets = UINT64_C(-1);
+ notit->prev_packet_snapshots.beginning_clock = UINT64_C(-1);
+ notit->prev_packet_snapshots.end_clock = UINT64_C(-1);
}
static
notit->cur_stream_class_id = -1;
notit->cur_event_class_id = -1;
notit->cur_data_stream_id = -1;
+ notit->prev_packet_snapshots = notit->snapshots;
notit->snapshots.discarded_events = UINT64_C(-1);
notit->snapshots.packets = UINT64_C(-1);
notit->snapshots.beginning_clock = UINT64_C(-1);
*message = msg;
}
+static
+void create_msg_discarded_events(struct bt_msg_iter *notit,
+ bt_message **message)
+{
+ bt_message *msg;
+ uint64_t beginning_raw_value = UINT64_C(-1);
+ uint64_t end_raw_value = UINT64_C(-1);
+ uint64_t count = UINT64_C(-1);
+
+ BT_ASSERT(notit->msg_iter);
+ BT_ASSERT(notit->stream);
+
+ if (notit->prev_packet_snapshots.discarded_events == UINT64_C(-1)) {
+ /*
+ * We discarded events, but before (and possibly
+ * including) the current packet: use this packet's time
+ * range, and do not have a specific count.
+ */
+ beginning_raw_value = notit->snapshots.beginning_clock;
+ end_raw_value = notit->snapshots.end_clock;
+ } else {
+ count = notit->snapshots.discarded_events -
+ notit->prev_packet_snapshots.discarded_events;
+ BT_ASSERT(count > 0);
+ beginning_raw_value = notit->prev_packet_snapshots.end_clock;
+ end_raw_value = notit->snapshots.end_clock;
+ }
+
+ if (beginning_raw_value != UINT64_C(-1) &&
+ end_raw_value != UINT64_C(-1)) {
+ msg = bt_message_discarded_events_create_with_default_clock_snapshots(
+ notit->msg_iter, notit->stream, beginning_raw_value,
+ end_raw_value);
+ } else {
+ msg = bt_message_discarded_events_create(notit->msg_iter,
+ notit->stream);
+ }
+
+ if (!msg) {
+ BT_LOGE("Cannot create discarded events message: "
+ "notit-addr=%p, stream-addr=%p",
+ notit, notit->stream);
+ return;
+ }
+
+ if (count != UINT64_C(-1)) {
+ bt_message_discarded_events_set_count(msg, count);
+ }
+
+ *message = msg;
+}
+
+static
+void create_msg_discarded_packets(struct bt_msg_iter *notit,
+ bt_message **message)
+{
+ bt_message *msg;
+
+ BT_ASSERT(notit->msg_iter);
+ BT_ASSERT(notit->stream);
+ BT_ASSERT(notit->prev_packet_snapshots.packets !=
+ UINT64_C(-1));
+
+ if (notit->prev_packet_snapshots.end_clock != UINT64_C(-1) &&
+ notit->snapshots.beginning_clock != UINT64_C(-1)) {
+ msg = bt_message_discarded_packets_create_with_default_clock_snapshots(
+ notit->msg_iter, notit->stream,
+ notit->prev_packet_snapshots.end_clock,
+ notit->snapshots.beginning_clock);
+ } else {
+ msg = bt_message_discarded_packets_create(notit->msg_iter,
+ notit->stream);
+ }
+
+ if (!msg) {
+ BT_LOGE("Cannot create discarded packets message: "
+ "notit-addr=%p, stream-addr=%p",
+ notit, notit->stream);
+ return;
+ }
+
+ bt_message_discarded_packets_set_count(msg,
+ notit->snapshots.packets -
+ notit->prev_packet_snapshots.packets - 1);
+ *message = msg;
+}
+
BT_HIDDEN
struct bt_msg_iter *bt_msg_iter_create(struct ctf_trace_class *tc,
size_t max_request_sz,
BT_ASSERT(notit);
BT_ASSERT(message);
notit->msg_iter = msg_iter;
+ notit->set_stream = true;
BT_LOGV("Getting next message: notit-addr=%p", notit);
while (true) {
set_event_default_clock_snapshot(notit);
*message = notit->event_msg;
notit->event_msg = NULL;
+ goto end;
+ case STATE_EMIT_MSG_DISCARDED_EVENTS:
+ /* create_msg_discared_events() logs errors */
+ create_msg_discarded_events(notit, message);
+
+ if (!*message) {
+ status = BT_MSG_ITER_STATUS_ERROR;
+ }
+
+ goto end;
+ case STATE_EMIT_MSG_DISCARDED_PACKETS:
+ /* create_msg_discared_packets() logs errors */
+ create_msg_discarded_packets(notit, message);
+
+ if (!*message) {
+ status = BT_MSG_ITER_STATUS_ERROR;
+ }
+
goto end;
case STATE_EMIT_MSG_PACKET_BEGINNING:
/* create_msg_packet_beginning() logs errors */
goto end;
case STATE_EMIT_MSG_STREAM_ACTIVITY_BEGINNING:
- if (notit->emit_stream_begin_msg) {
- /* create_msg_stream_activity_beginning() logs errors */
- create_msg_stream_activity_beginning(notit, message);
-
- if (!*message) {
- status = BT_MSG_ITER_STATUS_ERROR;
- }
+ /* create_msg_stream_activity_beginning() logs errors */
+ create_msg_stream_activity_beginning(notit, message);
- goto end;
+ if (!*message) {
+ status = BT_MSG_ITER_STATUS_ERROR;
}
- break;
+ goto end;
case STATE_EMIT_MSG_STREAM_ACTIVITY_END:
- if (notit->emit_stream_end_msg) {
- /* create_msg_stream_activity_end() logs errors */
- create_msg_stream_activity_end(notit, message);
-
- if (!*message) {
- status = BT_MSG_ITER_STATUS_ERROR;
- }
+ /* create_msg_stream_activity_end() logs errors */
+ create_msg_stream_activity_end(notit, message);
- goto end;
+ if (!*message) {
+ status = BT_MSG_ITER_STATUS_ERROR;
}
- break;
+ goto end;
case STATE_EMIT_MSG_STREAM_BEGINNING:
- status = set_current_stream(notit);
- if (status != BT_MSG_ITER_STATUS_OK) {
- goto end;
- }
-
- if (notit->emit_stream_begin_msg) {
- /* create_msg_stream_beginning() logs errors */
- create_msg_stream_beginning(notit, message);
-
- if (!*message) {
- status = BT_MSG_ITER_STATUS_ERROR;
- }
+ /* create_msg_stream_beginning() logs errors */
+ create_msg_stream_beginning(notit, message);
- goto end;
+ if (!*message) {
+ status = BT_MSG_ITER_STATUS_ERROR;
}
- break;
+ goto end;
case STATE_EMIT_MSG_STREAM_END:
- if (notit->emit_stream_end_msg) {
- /* create_msg_stream_end() logs errors */
- create_msg_stream_end(notit, message);
-
- if (!*message) {
- status = BT_MSG_ITER_STATUS_ERROR;
- }
+ /* create_msg_stream_end() logs errors */
+ create_msg_stream_end(notit, message);
- goto end;
+ if (!*message) {
+ status = BT_MSG_ITER_STATUS_ERROR;
}
- break;
+ goto end;
case STATE_DONE:
status = BT_MSG_ITER_STATUS_EOF;
goto end;
enum bt_msg_iter_status status = BT_MSG_ITER_STATUS_OK;
BT_ASSERT(notit);
+ notit->set_stream = false;
if (notit->state == STATE_EMIT_MSG_PACKET_BEGINNING) {
/* We're already there */
case STATE_DSCOPE_STREAM_PACKET_CONTEXT_BEGIN:
case STATE_DSCOPE_STREAM_PACKET_CONTEXT_CONTINUE:
case STATE_AFTER_STREAM_PACKET_CONTEXT:
+ case STATE_CHECK_EMIT_MSG_STREAM_BEGINNING:
case STATE_EMIT_MSG_STREAM_BEGINNING:
case STATE_EMIT_MSG_STREAM_ACTIVITY_BEGINNING:
+ case STATE_CHECK_EMIT_MSG_DISCARDED_EVENTS:
+ case STATE_EMIT_MSG_DISCARDED_EVENTS:
+ case STATE_CHECK_EMIT_MSG_DISCARDED_PACKETS:
+ case STATE_EMIT_MSG_DISCARDED_PACKETS:
/* Non-emitting state: continue */
break;
default: