struct bt_ctf_iter *bt_ctf_iter_create_intersect(struct bt_context *ctx,
struct bt_iter_pos **inter_begin_pos,
struct bt_iter_pos **inter_end_pos)
{
int ret;
uint64_t begin, end;
/*
* The iterator's range is the union of each trace's intersection of
* streams. This means that we determine the "active" region of each
* trace (that is the region where all of its streams are active), and
* use the TraceCollection to merge all of these active regions.
*
* This results in a union of the traces' active regions.
*/
ret = ctf_find_tc_stream_packet_intersection_union(ctx, &begin, &end);
if (ret == 1) {
fprintf(stderr, "[error] No intersection found between trace files.\n");
goto error;
} else if (ret != 0) {
goto error;
}
*inter_begin_pos = bt_iter_create_time_pos(NULL, begin);
if (!(*inter_begin_pos)) {
goto error;
}
*inter_end_pos = bt_iter_create_time_pos(NULL, end);
if (!(*inter_end_pos)) {
goto error;
}
ret = ctf_tc_set_stream_intersection_mode(ctx);
if (ret) {
goto error;
}
/*
* bt_ctf_iter does not take ownership of begin and end positions,
* so we return them to the caller who must still assume their ownership
* until the iterator is destroyed.
*/
return bt_ctf_iter_create(ctx, *inter_begin_pos,
*inter_end_pos);
error:
return NULL;
}
static
int convert_trace(struct bt_trace_descriptor *td_write,
struct bt_context *ctx)
{
struct bt_ctf_iter *iter;
struct ctf_text_stream_pos *sout;
struct bt_iter_pos *begin_pos = NULL, *end_pos = NULL;
struct bt_ctf_event *ctf_event;
int ret;
sout = container_of(td_write, struct ctf_text_stream_pos,
trace_descriptor);
if (!sout->parent.event_cb) {
return 0;
}
if (opt_stream_intersection) {
iter = bt_ctf_iter_create_intersect(ctx, &begin_pos, &end_pos);
} else {
begin_pos = bt_iter_create_time_pos(NULL, 0);
begin_pos->type = BT_SEEK_BEGIN;
iter = bt_ctf_iter_create(ctx, begin_pos, NULL);
}
if (!iter) {
ret = -1;
goto error_iter;
}
while ((ctf_event = bt_ctf_iter_read_event(iter))) {
ret = sout->parent.event_cb(&sout->parent, ctf_event->parent->stream);
if (ret) {
fprintf(stderr, "[error] Writing event failed.\n");
goto end;
}
ret = bt_iter_next(bt_ctf_get_iter(iter));
if (ret < 0) {
goto end;
}
}
ret = 0;
end:
bt_ctf_iter_destroy(iter);
error_iter:
bt_iter_free_pos(begin_pos);
bt_iter_free_pos(end_pos);
return ret;
}
LttvTracesetPosition *lttv_traceset_create_time_position(LttvTraceset *traceset,
LttTime timestamp)
{
LttvTracesetPosition *traceset_pos;
traceset_pos = g_new(LttvTracesetPosition, 1);
/* Check if the new passed */
if(traceset_pos == NULL) {
return NULL;
}
traceset_pos->iter = traceset->iter;
traceset_pos->bt_pos = bt_iter_create_time_pos(
bt_ctf_get_iter(traceset_pos->iter),
ltt_time_to_uint64(timestamp));
traceset_pos->timestamp = G_MAXUINT64;
traceset_pos->cpu_id = INT_MAX;
return traceset_pos;
}
