-/*
- * stream.c
- *
- * Babeltrace CTF IR - Stream
- *
- * Copyright 2013, 2014 Jérémie Galarneau <jeremie.galarneau@efficios.com>
- *
- * Author: Jérémie Galarneau <jeremie.galarneau@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
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-
-#include <babeltrace/ctf-ir/clock-class.h>
-#include <babeltrace/ctf-writer/clock.h>
-#include <babeltrace/ctf-writer/clock-internal.h>
-#include <babeltrace/ctf-writer/event.h>
-#include <babeltrace/ctf-ir/event-internal.h>
-#include <babeltrace/ctf-ir/field-types-internal.h>
-#include <babeltrace/ctf-ir/fields-internal.h>
-#include <babeltrace/ctf-ir/stream.h>
-#include <babeltrace/ctf-ir/stream-internal.h>
-#include <babeltrace/ctf-ir/stream-class-internal.h>
-#include <babeltrace/ctf-ir/trace-internal.h>
-#include <babeltrace/ctf-writer/writer-internal.h>
-#include <babeltrace/ref.h>
-#include <babeltrace/ctf-writer/functor-internal.h>
-#include <babeltrace/compiler.h>
-#include <babeltrace/align.h>
-#include <babeltrace/ctf/ctf-index.h>
-
-static
-void bt_ctf_stream_destroy(struct bt_object *obj);
-static
-int try_set_structure_field_integer(struct bt_ctf_field *, char *, uint64_t);
-static
-int set_structure_field_integer(struct bt_ctf_field *, char *, uint64_t);
-
-static
-int set_integer_field_value(struct bt_ctf_field* field, uint64_t value)
-{
- int ret = 0;
- struct bt_ctf_field_type *field_type = NULL;
-
- if (!field) {
- ret = -1;
- goto end;
- }
-
- field_type = bt_ctf_field_get_type(field);
- assert(field_type);
-
- if (bt_ctf_field_type_get_type_id(field_type) !=
- BT_CTF_TYPE_ID_INTEGER) {
- /* Not an integer and the value is unset, error. */
- ret = -1;
- goto end;
- }
-
- if (bt_ctf_field_type_integer_get_signed(field_type)) {
- ret = bt_ctf_field_signed_integer_set_value(field, (int64_t) value);
- if (ret) {
- /* Value is out of range, error. */
- goto end;
- }
- } else {
- ret = bt_ctf_field_unsigned_integer_set_value(field, value);
- if (ret) {
- /* Value is out of range, error. */
- goto end;
- }
- }
-end:
- bt_put(field_type);
- return ret;
-}
-
-static
-int set_packet_header_magic(struct bt_ctf_stream *stream)
-{
- int ret = 0;
- struct bt_ctf_field_type *magic_field_type = NULL;
- struct bt_ctf_field *magic_field = bt_ctf_field_structure_get_field(
- stream->packet_header, "magic");
-
- if (!magic_field) {
- /* No magic field found. Not an error, skip. */
- goto end;
- }
-
- if (bt_ctf_field_is_set(magic_field)) {
- /* Value already set. Not an error, skip. */
- goto end;
- }
-
- magic_field_type = bt_ctf_field_get_type(magic_field);
- assert(magic_field_type);
-
- if (bt_ctf_field_type_get_type_id(magic_field_type) !=
- BT_CTF_TYPE_ID_INTEGER) {
- /* Magic field is not an integer. Not an error, skip. */
- goto end;
- }
-
- if (bt_ctf_field_type_integer_get_size(magic_field_type) != 32) {
- /*
- * Magic field is not of the expected size.
- * Not an error, skip.
- */
- goto end;
- }
-
- ret = bt_ctf_field_type_integer_get_signed(magic_field_type);
- assert(ret >= 0);
- if (ret) {
- ret = bt_ctf_field_signed_integer_set_value(magic_field,
- (int64_t) 0xC1FC1FC1);
- } else {
- ret = bt_ctf_field_unsigned_integer_set_value(magic_field,
- (uint64_t) 0xC1FC1FC1);
- }
-end:
- bt_put(magic_field);
- bt_put(magic_field_type);
- return ret;
-}
-
-static
-int set_packet_header_uuid(struct bt_ctf_stream *stream)
-{
- int i, ret = 0;
- struct bt_ctf_trace *trace = NULL;
- struct bt_ctf_field_type *uuid_field_type = NULL;
- struct bt_ctf_field_type *element_field_type = NULL;
- struct bt_ctf_field *uuid_field = bt_ctf_field_structure_get_field(
- stream->packet_header, "uuid");
-
- if (!uuid_field) {
- /* No uuid field found. Not an error, skip. */
- goto end;
- }
-
- if (bt_ctf_field_is_set(uuid_field)) {
- /* Value already set. Not an error, skip. */
- goto end;
- }
-
- uuid_field_type = bt_ctf_field_get_type(uuid_field);
- assert(uuid_field_type);
- if (bt_ctf_field_type_get_type_id(uuid_field_type) !=
- BT_CTF_TYPE_ID_ARRAY) {
- /* UUID field is not an array. Not an error, skip. */
- goto end;
- }
-
- if (bt_ctf_field_type_array_get_length(uuid_field_type) != 16) {
- /*
- * UUID field is not of the expected size.
- * Not an error, skip.
- */
- goto end;
- }
-
- element_field_type = bt_ctf_field_type_array_get_element_type(
- uuid_field_type);
- assert(element_field_type);
- if (bt_ctf_field_type_get_type_id(element_field_type) !=
- BT_CTF_TYPE_ID_INTEGER) {
- /* UUID array elements are not integers. Not an error, skip */
- goto end;
- }
-
- trace = (struct bt_ctf_trace *) bt_object_get_parent(stream);
- for (i = 0; i < 16; i++) {
- struct bt_ctf_field *uuid_element =
- bt_ctf_field_array_get_field(uuid_field, i);
-
- ret = bt_ctf_field_type_integer_get_signed(element_field_type);
- assert(ret >= 0);
-
- if (ret) {
- ret = bt_ctf_field_signed_integer_set_value(
- uuid_element, (int64_t) trace->uuid[i]);
- } else {
- ret = bt_ctf_field_unsigned_integer_set_value(
- uuid_element,
- (uint64_t) trace->uuid[i]);
- }
- bt_put(uuid_element);
- if (ret) {
- goto end;
- }
- }
-
-end:
- bt_put(uuid_field);
- bt_put(uuid_field_type);
- bt_put(element_field_type);
- BT_PUT(trace);
- return ret;
-}
-static
-int set_packet_header_stream_id(struct bt_ctf_stream *stream)
-{
- int ret = 0;
- uint32_t stream_id;
- struct bt_ctf_field_type *stream_id_field_type = NULL;
- struct bt_ctf_field *stream_id_field = bt_ctf_field_structure_get_field(
- stream->packet_header, "stream_id");
-
- if (!stream_id_field) {
- /* No stream_id field found. Not an error, skip. */
- goto end;
- }
-
- if (bt_ctf_field_is_set(stream_id_field)) {
- /* Value already set. Not an error, skip. */
- goto end;
- }
-
- stream_id_field_type = bt_ctf_field_get_type(stream_id_field);
- assert(stream_id_field_type);
- if (bt_ctf_field_type_get_type_id(stream_id_field_type) !=
- BT_CTF_TYPE_ID_INTEGER) {
- /* stream_id field is not an integer. Not an error, skip. */
- goto end;
- }
-
- stream_id = stream->stream_class->id;
- ret = bt_ctf_field_type_integer_get_signed(stream_id_field_type);
- assert(ret >= 0);
- if (ret) {
- ret = bt_ctf_field_signed_integer_set_value(stream_id_field,
- (int64_t) stream_id);
- } else {
- ret = bt_ctf_field_unsigned_integer_set_value(stream_id_field,
- (uint64_t) stream_id);
- }
-end:
- bt_put(stream_id_field);
- bt_put(stream_id_field_type);
- return ret;
-}
-
-static
-int set_packet_header(struct bt_ctf_stream *stream)
-{
- int ret;
-
- ret = set_packet_header_magic(stream);
- if (ret) {
- goto end;
- }
-
- ret = set_packet_header_uuid(stream);
- if (ret) {
- goto end;
- }
-
- ret = set_packet_header_stream_id(stream);
- if (ret) {
- goto end;
- }
-end:
- return ret;
-}
-
-static
-void release_event(struct bt_ctf_event *event)
-{
- if (bt_object_get_ref_count(event)) {
- /*
- * The event is being orphaned, but it must guarantee the
- * existence of its event class for the duration of its
- * lifetime.
- */
- bt_get(event->event_class);
- BT_PUT(event->base.parent);
- } else {
- bt_object_release(event);
- }
-}
-
-static
-int create_stream_file(struct bt_ctf_writer *writer,
- struct bt_ctf_stream *stream)
-{
- int fd;
- GString *filename = g_string_new(stream->stream_class->name->str);
-
- if (stream->stream_class->name->len == 0) {
- int64_t ret;
-
- ret = bt_ctf_stream_class_get_id(stream->stream_class);
- if (ret < 0) {
- fd = -1;
- goto error;
- }
-
- g_string_printf(filename, "stream_%" PRId64, ret);
- }
-
- g_string_append_printf(filename, "_%" PRIu32, stream->id);
- fd = openat(writer->trace_dir_fd, filename->str,
- O_RDWR | O_CREAT | O_TRUNC,
- S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP);
-error:
- g_string_free(filename, TRUE);
- return fd;
-}
-
-static
-int set_stream_fd(struct bt_ctf_stream *stream, int fd)
-{
- int ret = 0;
-
- if (stream->pos.fd != -1) {
- ret = -1;
- goto end;
- }
-
- ctf_init_pos(&stream->pos, NULL, fd, O_RDWR);
- stream->pos.fd = fd;
-end:
- return ret;
-}
-
-struct bt_ctf_stream *bt_ctf_stream_create(
- struct bt_ctf_stream_class *stream_class,
- const char *name)
-{
- int ret;
- struct bt_ctf_stream *stream = NULL;
- struct bt_ctf_trace *trace = NULL;
- struct bt_ctf_writer *writer = NULL;
-
- if (!stream_class) {
- goto error;
- }
-
- trace = bt_ctf_stream_class_get_trace(stream_class);
- if (!trace) {
- goto error;
- }
-
- stream = g_new0(struct bt_ctf_stream, 1);
- if (!stream) {
- goto error;
- }
-
- bt_object_init(stream, bt_ctf_stream_destroy);
- /*
- * Acquire reference to parent since stream will become publicly
- * reachable; it needs its parent to remain valid.
- */
- bt_object_set_parent(stream, trace);
- stream->id = stream_class->next_stream_id++;
- stream->stream_class = stream_class;
- stream->pos.fd = -1;
-
- if (name) {
- stream->name = g_string_new(name);
- if (!stream->name) {
- goto error;
- }
- }
-
- if (trace->is_created_by_writer) {
- int fd;
- writer = (struct bt_ctf_writer *)
- bt_object_get_parent(trace);
-
- assert(writer);
- if (stream_class->packet_context_type) {
- stream->packet_context = bt_ctf_field_create(
- stream_class->packet_context_type);
- if (!stream->packet_context) {
- goto error;
- }
-
- /* Initialize events_discarded */
- ret = try_set_structure_field_integer(
- stream->packet_context,
- "events_discarded", 0);
- if (ret != 1) {
- goto error;
- }
- }
-
- stream->events = g_ptr_array_new_with_free_func(
- (GDestroyNotify) release_event);
- if (!stream->events) {
- goto error;
- }
-
- /* A trace is not allowed to have a NULL packet header */
- assert(trace->packet_header_type);
- stream->packet_header =
- bt_ctf_field_create(trace->packet_header_type);
- if (!stream->packet_header) {
- goto error;
- }
-
- /*
- * Attempt to populate the default trace packet header fields
- * (magic, uuid and stream_id). This will _not_ fail shall the
- * fields not be found or be of an incompatible type; they will
- * simply not be populated automatically. The user will have to
- * make sure to set the trace packet header fields himself
- * before flushing.
- */
- ret = set_packet_header(stream);
- if (ret) {
- goto error;
- }
-
- /* Create file associated with this stream */
- fd = create_stream_file(writer, stream);
- if (fd < 0) {
- goto error;
- }
-
- ret = set_stream_fd(stream, fd);
- if (ret) {
- goto error;
- }
-
- /* Freeze the writer */
- bt_ctf_writer_freeze(writer);
- } else {
- /* Non-writer stream indicated by a negative FD */
- ret = set_stream_fd(stream, -1);
- if (ret) {
- goto error;
- }
- }
-
- /* Add this stream to the trace's streams */
- g_ptr_array_add(trace->streams, stream);
-
- BT_PUT(trace);
- BT_PUT(writer);
- return stream;
-error:
- BT_PUT(stream);
- BT_PUT(trace);
- BT_PUT(writer);
- return stream;
-}
-
-struct bt_ctf_stream_class *bt_ctf_stream_get_class(
- struct bt_ctf_stream *stream)
-{
- struct bt_ctf_stream_class *stream_class = NULL;
-
- if (!stream) {
- goto end;
- }
-
- stream_class = stream->stream_class;
- bt_get(stream_class);
-end:
- return stream_class;
-}
-
-int bt_ctf_stream_get_discarded_events_count(
- struct bt_ctf_stream *stream, uint64_t *count)
-{
- int64_t ret = 0;
- int field_signed;
- struct bt_ctf_field *events_discarded_field = NULL;
- struct bt_ctf_field_type *events_discarded_field_type = NULL;
-
- if (!stream || !count || !stream->packet_context ||
- stream->pos.fd < 0) {
- ret = -1;
- goto end;
- }
-
- events_discarded_field = bt_ctf_field_structure_get_field(
- stream->packet_context, "events_discarded");
- if (!events_discarded_field) {
- ret = -1;
- goto end;
- }
-
- events_discarded_field_type = bt_ctf_field_get_type(
- events_discarded_field);
- if (!events_discarded_field_type) {
- ret = -1;
- goto end;
- }
-
- field_signed = bt_ctf_field_type_integer_get_signed(
- events_discarded_field_type);
- if (field_signed < 0) {
- ret = field_signed;
- goto end;
- }
-
- if (field_signed) {
- int64_t signed_count;
-
- ret = bt_ctf_field_signed_integer_get_value(
- events_discarded_field, &signed_count);
- if (ret) {
- goto end;
- }
- if (signed_count < 0) {
- /* Invalid value */
- ret = -1;
- goto end;
- }
- *count = (uint64_t) signed_count;
- } else {
- ret = bt_ctf_field_unsigned_integer_get_value(
- events_discarded_field, count);
- if (ret) {
- goto end;
- }
- }
-end:
- bt_put(events_discarded_field);
- bt_put(events_discarded_field_type);
- return ret;
-}
-
-void bt_ctf_stream_append_discarded_events(struct bt_ctf_stream *stream,
- uint64_t event_count)
-{
- int ret;
- int field_signed;
- uint64_t previous_count;
- uint64_t new_count;
- struct bt_ctf_field *events_discarded_field = NULL;
- struct bt_ctf_field_type *events_discarded_field_type = NULL;
-
- if (!stream || !stream->packet_context || stream->pos.fd < 0) {
- goto end;
- }
-
- ret = bt_ctf_stream_get_discarded_events_count(stream,
- &previous_count);
- if (ret) {
- goto end;
- }
-
- events_discarded_field = bt_ctf_field_structure_get_field(
- stream->packet_context, "events_discarded");
- if (!events_discarded_field) {
- goto end;
- }
-
- events_discarded_field_type = bt_ctf_field_get_type(
- events_discarded_field);
- if (!events_discarded_field_type) {
- goto end;
- }
-
- field_signed = bt_ctf_field_type_integer_get_signed(
- events_discarded_field_type);
- if (field_signed < 0) {
- goto end;
- }
-
- new_count = previous_count + event_count;
- if (field_signed) {
- ret = bt_ctf_field_signed_integer_set_value(
- events_discarded_field, (int64_t) new_count);
- if (ret) {
- goto end;
- }
- } else {
- ret = bt_ctf_field_unsigned_integer_set_value(
- events_discarded_field, new_count);
- if (ret) {
- goto end;
- }
- }
-
-end:
- bt_put(events_discarded_field);
- bt_put(events_discarded_field_type);
-}
-
-static int auto_populate_event_header(struct bt_ctf_stream *stream,
- struct bt_ctf_event *event)
-{
- int ret = 0;
- struct bt_ctf_field *id_field = NULL, *timestamp_field = NULL;
- struct bt_ctf_clock_class *mapped_clock_class = NULL;
-
- if (!event || event->frozen) {
- ret = -1;
- goto end;
- }
-
- /*
- * The condition to automatically set the ID are:
- *
- * 1. The event header field "id" exists and is an integer
- * field.
- * 2. The event header field "id" is NOT set.
- */
- id_field = bt_ctf_field_structure_get_field(event->event_header, "id");
- if (id_field && !bt_ctf_field_is_set(id_field)) {
- ret = set_integer_field_value(id_field,
- (uint64_t) bt_ctf_event_class_get_id(
- event->event_class));
- if (ret) {
- goto end;
- }
- }
-
- /*
- * The conditions to automatically set the timestamp are:
- *
- * 1. The event header field "timestamp" exists and is an
- * integer field.
- * 2. This stream's class has a registered clock (set with
- * bt_ctf_stream_class_set_clock()).
- * 3. The event header field "timestamp" has its type mapped to
- * a clock class which is also the clock class of this
- * stream's class's registered clock.
- * 4. The event header field "timestamp" is NOT set.
- */
- timestamp_field = bt_ctf_field_structure_get_field(event->event_header,
- "timestamp");
- if (timestamp_field && !bt_ctf_field_is_set(timestamp_field) &&
- stream->stream_class->clock) {
- struct bt_ctf_clock_class *stream_class_clock_class =
- stream->stream_class->clock->clock_class;
- struct bt_ctf_field_type *timestamp_field_type =
- bt_ctf_field_get_type(timestamp_field);
-
- assert(timestamp_field_type);
- mapped_clock_class =
- bt_ctf_field_type_integer_get_mapped_clock_class(
- timestamp_field_type);
- BT_PUT(timestamp_field_type);
- if (mapped_clock_class == stream_class_clock_class) {
- uint64_t timestamp;
-
- ret = bt_ctf_clock_get_value(
- stream->stream_class->clock,
- ×tamp);
- if (ret) {
- goto end;
- }
-
- ret = set_integer_field_value(timestamp_field,
- timestamp);
- if (ret) {
- goto end;
- }
- }
- }
-
-end:
- bt_put(id_field);
- bt_put(timestamp_field);
- bt_put(mapped_clock_class);
- return ret;
-}
-
-int bt_ctf_stream_append_event(struct bt_ctf_stream *stream,
- struct bt_ctf_event *event)
-{
- int ret = 0;
-
- if (!stream || !event || stream->pos.fd < 0) {
- ret = -1;
- goto end;
- }
-
- /*
- * The event is not supposed to have a parent stream at this
- * point. The only other way an event can have a parent stream
- * is if it was assigned when setting a packet to the event,
- * in which case the packet's stream is not a writer stream,
- * and thus the user is trying to append an event which belongs
- * to another stream.
- */
- if (event->base.parent) {
- ret = -1;
- goto end;
- }
-
- bt_object_set_parent(event, stream);
- ret = auto_populate_event_header(stream, event);
- if (ret) {
- goto error;
- }
-
- /* Make sure the various scopes of the event are set */
- ret = bt_ctf_event_validate(event);
- if (ret) {
- goto error;
- }
-
- /* Save the new event and freeze it */
- bt_ctf_event_freeze(event);
- g_ptr_array_add(stream->events, event);
-
- /*
- * Event had to hold a reference to its event class as long as it wasn't
- * part of the same trace hierarchy. From now on, the event and its
- * class share the same lifetime guarantees and the reference is no
- * longer needed.
- */
- bt_put(event->event_class);
-
-end:
- return ret;
-
-error:
- /*
- * Orphan the event; we were not successful in associating it to
- * a stream.
- */
- bt_object_set_parent(event, NULL);
-
- return ret;
-}
-
-struct bt_ctf_field *bt_ctf_stream_get_packet_context(
- struct bt_ctf_stream *stream)
-{
- struct bt_ctf_field *packet_context = NULL;
-
- if (!stream || stream->pos.fd < 0) {
- goto end;
- }
-
- packet_context = stream->packet_context;
- if (packet_context) {
- bt_get(packet_context);
- }
-end:
- return packet_context;
-}
-
-int bt_ctf_stream_set_packet_context(struct bt_ctf_stream *stream,
- struct bt_ctf_field *field)
-{
- int ret = 0;
- struct bt_ctf_field_type *field_type;
-
- if (!stream || stream->pos.fd < 0) {
- ret = -1;
- goto end;
- }
-
- field_type = bt_ctf_field_get_type(field);
- if (bt_ctf_field_type_compare(field_type,
- stream->stream_class->packet_context_type)) {
- ret = -1;
- goto end;
- }
-
- bt_put(field_type);
- bt_put(stream->packet_context);
- stream->packet_context = bt_get(field);
-end:
- return ret;
-}
-
-struct bt_ctf_field *bt_ctf_stream_get_packet_header(
- struct bt_ctf_stream *stream)
-{
- struct bt_ctf_field *packet_header = NULL;
-
- if (!stream || stream->pos.fd < 0) {
- goto end;
- }
-
- packet_header = stream->packet_header;
- if (packet_header) {
- bt_get(packet_header);
- }
-end:
- return packet_header;
-}
-
-int bt_ctf_stream_set_packet_header(struct bt_ctf_stream *stream,
- struct bt_ctf_field *field)
-{
- int ret = 0;
- struct bt_ctf_trace *trace = NULL;
- struct bt_ctf_field_type *field_type = NULL;
-
- if (!stream || stream->pos.fd < 0) {
- ret = -1;
- goto end;
- }
-
- trace = (struct bt_ctf_trace *) bt_object_get_parent(stream);
- field_type = bt_ctf_field_get_type(field);
- if (bt_ctf_field_type_compare(field_type, trace->packet_header_type)) {
- ret = -1;
- goto end;
- }
-
- bt_put(stream->packet_header);
- stream->packet_header = bt_get(field);
-end:
- BT_PUT(trace);
- bt_put(field_type);
- return ret;
-}
-
-static
-int get_event_header_timestamp(struct bt_ctf_field *event_header, uint64_t *timestamp)
-{
- int ret = 0;
- struct bt_ctf_field *timestamp_field = NULL;
- struct bt_ctf_field_type *timestamp_field_type = NULL;
-
- timestamp_field = bt_ctf_field_structure_get_field(event_header,
- "timestamp");
- if (!timestamp_field) {
- ret = -1;
- goto end;
- }
-
- timestamp_field_type = bt_ctf_field_get_type(timestamp_field);
- assert(timestamp_field_type);
- if (bt_ctf_field_type_get_type_id(timestamp_field_type) !=
- BT_CTF_TYPE_ID_INTEGER) {
- ret = -1;
- goto end;
- }
-
- if (bt_ctf_field_type_integer_get_signed(timestamp_field_type)) {
- int64_t val;
-
- ret = bt_ctf_field_signed_integer_get_value(timestamp_field,
- &val);
- if (ret) {
- goto end;
- }
- *timestamp = (uint64_t) val;
- } else {
- ret = bt_ctf_field_unsigned_integer_get_value(timestamp_field,
- timestamp);
- if (ret) {
- goto end;
- }
- }
-end:
- bt_put(timestamp_field);
- bt_put(timestamp_field_type);
- return ret;
-}
-
-static
-void reset_structure_field(struct bt_ctf_field *structure, const char *name)
-{
- struct bt_ctf_field *member;
-
- member = bt_ctf_field_structure_get_field(structure, name);
- assert(member);
- (void) bt_ctf_field_reset(member);
- bt_put(member);
-}
-
-int bt_ctf_stream_flush(struct bt_ctf_stream *stream)
-{
- int ret = 0;
- size_t i;
- uint64_t timestamp_begin, timestamp_end;
- struct bt_ctf_field *integer = NULL;
- struct ctf_stream_pos packet_context_pos;
- bool empty_packet;
- uint64_t packet_size_bits;
- struct {
- bool timestamp_begin;
- bool timestamp_end;
- bool content_size;
- bool packet_size;
- } auto_set_fields = { 0 };
-
- if (!stream || stream->pos.fd < 0) {
- /*
- * Stream does not have an associated fd. It is,
- * therefore, not a stream being used to write events.
- */
- ret = -1;
- goto end;
- }
-
- if (!stream->packet_context && stream->flushed_packet_count > 0) {
- /*
- * A stream without a packet context, and thus without
- * content and packet size members, can't have more than
- * one packet.
- */
- ret = -1;
- goto end;
- }
-
- empty_packet = (stream->events->len == 0);
-
- /* mmap the next packet */
- ctf_packet_seek(&stream->pos.parent, 0, SEEK_CUR);
- ret = bt_ctf_field_serialize(stream->packet_header, &stream->pos);
- if (ret) {
- goto end;
- }
-
- if (stream->packet_context) {
- /* Set the default context attributes if present and unset. */
- if (!empty_packet && !get_event_header_timestamp(
- ((struct bt_ctf_event *) g_ptr_array_index(
- stream->events, 0))->event_header, ×tamp_begin)) {
- ret = try_set_structure_field_integer(
- stream->packet_context,
- "timestamp_begin", timestamp_begin);
- if (ret < 0) {
- goto end;
- }
- auto_set_fields.timestamp_begin = ret == 1;
- }
-
- if (!empty_packet && !get_event_header_timestamp(
- ((struct bt_ctf_event *) g_ptr_array_index(
- stream->events, stream->events->len - 1))->event_header,
- ×tamp_end)) {
-
- ret = try_set_structure_field_integer(
- stream->packet_context,
- "timestamp_end", timestamp_end);
- if (ret < 0) {
- goto end;
- }
- auto_set_fields.timestamp_end = ret == 1;
- }
- ret = try_set_structure_field_integer(stream->packet_context,
- "content_size", UINT64_MAX);
- if (ret < 0) {
- goto end;
- }
- auto_set_fields.content_size = ret == 1;
-
- ret = try_set_structure_field_integer(stream->packet_context,
- "packet_size", UINT64_MAX);
- if (ret < 0) {
- goto end;
- }
- auto_set_fields.packet_size = ret == 1;
-
- /* Write packet context */
- memcpy(&packet_context_pos, &stream->pos,
- sizeof(struct ctf_stream_pos));
- ret = bt_ctf_field_serialize(stream->packet_context,
- &stream->pos);
- if (ret) {
- goto end;
- }
- }
-
- for (i = 0; i < stream->events->len; i++) {
- struct bt_ctf_event *event = g_ptr_array_index(
- stream->events, i);
-
- /* Write event header */
- ret = bt_ctf_field_serialize(event->event_header,
- &stream->pos);
- if (ret) {
- goto end;
- }
-
- /* Write stream event context */
- if (event->stream_event_context) {
- ret = bt_ctf_field_serialize(
- event->stream_event_context, &stream->pos);
- if (ret) {
- goto end;
- }
- }
-
- /* Write event content */
- ret = bt_ctf_event_serialize(event, &stream->pos);
- if (ret) {
- goto end;
- }
- }
-
- /* Rounded-up in case content_size is not byte-aligned. */
- packet_size_bits = (stream->pos.offset + (CHAR_BIT - 1)) &
- ~(CHAR_BIT - 1);
- stream->pos.packet_size = packet_size_bits;
-
- if (stream->packet_context) {
- /*
- * Update the packet total size and content size and overwrite
- * the packet context.
- * Copy base_mma as the packet may have been remapped (e.g. when
- * a packet is resized).
- */
- packet_context_pos.base_mma = stream->pos.base_mma;
- if (auto_set_fields.content_size) {
- ret = set_structure_field_integer(
- stream->packet_context,
- "content_size", stream->pos.offset);
- if (ret < 0) {
- goto end;
- }
- }
-
- if (auto_set_fields.packet_size) {
- ret = set_structure_field_integer(stream->packet_context,
- "packet_size", packet_size_bits);
- if (ret < 0) {
- goto end;
- }
- }
-
- ret = bt_ctf_field_serialize(stream->packet_context,
- &packet_context_pos);
- if (ret) {
- goto end;
- }
- }
-
- g_ptr_array_set_size(stream->events, 0);
- stream->flushed_packet_count++;
- stream->size += packet_size_bits / CHAR_BIT;
-end:
- /* Reset automatically-set fields. */
- if (auto_set_fields.timestamp_begin) {
- reset_structure_field(stream->packet_context,
- "timestamp_begin");
- }
- if (auto_set_fields.timestamp_end) {
- reset_structure_field(stream->packet_context,
- "timestamp_end");
- }
- if (auto_set_fields.packet_size) {
- reset_structure_field(stream->packet_context,
- "packet_size");
- }
- if (auto_set_fields.content_size) {
- reset_structure_field(stream->packet_context,
- "content_size");
- }
- bt_put(integer);
-
- if (ret < 0) {
- /*
- * We failed to write the packet. Its size is therefore set to 0
- * to ensure the next mapping is done in the same place rather
- * than advancing by "stream->pos.packet_size", which would
- * leave a corrupted packet in the trace.
- */
- stream->pos.packet_size = 0;
- }
- return ret;
-}
-
-void bt_ctf_stream_get(struct bt_ctf_stream *stream)
-{
- bt_get(stream);
-}
-
-void bt_ctf_stream_put(struct bt_ctf_stream *stream)
-{
- bt_put(stream);
-}
-
-static
-void bt_ctf_stream_destroy(struct bt_object *obj)
-{
- struct bt_ctf_stream *stream;
-
- stream = container_of(obj, struct bt_ctf_stream, base);
- ctf_fini_pos(&stream->pos);
- if (stream->pos.fd >= 0) {
- int ret;
-
- /*
- * Truncate the file's size to the minimum required to fit the
- * last packet as we might have grown it too much on the last
- * mmap.
- */
- do {
- ret = ftruncate(stream->pos.fd, stream->size);
- } while (ret == -1 && errno == EINTR);
- if (ret) {
- perror("ftruncate");
- }
-
- if (close(stream->pos.fd)) {
- perror("close");
- }
- }
-
- if (stream->events) {
- g_ptr_array_free(stream->events, TRUE);
- }
-
- if (stream->name) {
- g_string_free(stream->name, TRUE);
- }
-
- bt_put(stream->packet_header);
- bt_put(stream->packet_context);
- g_free(stream);
-}
-
-static
-int _set_structure_field_integer(struct bt_ctf_field *structure, char *name,
- uint64_t value, bool force)
-{
- int ret = 0;
- struct bt_ctf_field_type *field_type = NULL;
- struct bt_ctf_field *integer =
- bt_ctf_field_structure_get_field(structure, name);
-
- if (!structure || !name) {
- ret = -1;
- goto end;
- }
-
- if (!integer) {
- /* Field not found, not an error. */
- goto end;
- }
-
- /* Make sure the payload has not already been set. */
- if (!force && bt_ctf_field_is_set(integer)) {
- /* Payload already set, not an error */
- goto end;
- }
-
- field_type = bt_ctf_field_get_type(integer);
- assert(field_type);
- if (bt_ctf_field_type_get_type_id(field_type) != BT_CTF_TYPE_ID_INTEGER) {
- /*
- * The user most likely meant for us to populate this field
- * automatically. However, we can only do this if the field
- * is an integer. Return an error.
- */
- ret = -1;
- goto end;
- }
-
- if (bt_ctf_field_type_integer_get_signed(field_type)) {
- ret = bt_ctf_field_signed_integer_set_value(integer,
- (int64_t) value);
- } else {
- ret = bt_ctf_field_unsigned_integer_set_value(integer, value);
- }
- ret = !ret ? 1 : ret;
-end:
- bt_put(integer);
- bt_put(field_type);
- return ret;
-}
-
-static
-int set_structure_field_integer(struct bt_ctf_field *structure, char *name,
- uint64_t value)
-{
- return _set_structure_field_integer(structure, name, value, true);
-}
-
-/*
- * Returns the following codes:
- * 1 if the field was found and set,
- * 0 if nothing was done (field not found, or was already set),
- * <0 if an error was encoutered
- */
-static
-int try_set_structure_field_integer(struct bt_ctf_field *structure, char *name,
- uint64_t value)
-{
- return _set_structure_field_integer(structure, name, value, false);
-}
-
-const char *bt_ctf_stream_get_name(struct bt_ctf_stream *stream)
-{
- const char *name = NULL;
-
- if (!stream) {
- goto end;
- }
-
- name = stream->name ? stream->name->str : NULL;
-
-end:
- return name;
-}
-
-int bt_ctf_stream_is_writer(struct bt_ctf_stream *stream)
-{
- int ret = -1;
-
- if (!stream) {
- goto end;
- }
-
- ret = (stream->pos.fd >= 0);
-
-end:
- return ret;
-}
projects / babeltrace.git / blobdiff