-void dump_snapshot()
-{
- struct lttng_consumer_stream *iter;
- unsigned long spos;
- struct mmap_stream *new_snapshot;
-
- int ret = 0;
- int i;
- /*
- * try lock mutex ressource courante (overrun)
- * if fail : overrun
- * stop trace (flush implicite avant stop)
- * lttng_consumer_take_snapshot
- * read timestamp packet end (use time as end pos)
- * - stream_packet_context
- * - reculer de 1 subbuf : pos - max_subbuff_size
- *
- * - position de fin (take_snapshot)
- * - mov_pos_slow ( fin - max_subbuff_size) lire timestamp packet end
- * - prend min(end) (activité sur tous les streams)
- *
- * start trace
- * unlock mutex
- */
-
- helper_kernctl_buffer_flush(consumerd_metadata);
- for (i = 0; i < lttng_consumer_stream_array->len; i++) {
- iter = g_ptr_array_index(lttng_consumer_stream_array, i);
- helper_kernctl_buffer_flush(helper_get_lttng_consumer_stream_wait_fd(iter));
- ret = helper_lttng_consumer_take_snapshot(ctx, iter);
- if (ret != 0) {
- ret = errno;
- perror("lttng_consumer_take_snapshots");
- goto end;
- }
- }
- for (i = 0; i < lttng_consumer_stream_array->len; i++) {
- iter = g_ptr_array_index(lttng_consumer_stream_array, i);
- //cds_list_for_each_entry(iter2, &mmap_stream_list.head, list) {
-
- ret = helper_lttng_consumer_get_produced_snapshot(ctx, iter, &spos);
- if (ret != 0) {
- ret = errno;
- perror("helper_lttng_consumer_get_produced_snapshot");
- goto end;
- }
- //while (iter->last_pos < spos) { FIXME : last_pos does not exists
- new_snapshot = g_new0(struct mmap_stream, 1);
- new_snapshot->fd = helper_get_lttng_consumer_stream_wait_fd(iter);
- //FIXME new_snapshot->last_pos = iter->last_pos; /* not last_pos, pos for the snapshot */
-// fprintf(stderr,"ADDING AVAILABLE SNAPSHOT ON FD %d AT POSITION %lu\n",
-// new_snapshot->kconsumerd_fd->wait_fd,
-// new_snapshot->last_pos);
- g_ptr_array_add(available_snapshots, new_snapshot);
- //FIXME iter->last_pos += iter->chan->max_sb_size;
- //}
- }
-
- if (!metadata_ready) {
-// fprintf(stderr, "BLOCKING BEFORE METADATA\n");
- sem_wait(&metadata_available);
-// fprintf(stderr,"OPENING TRACE\n");
- if (access("/tmp/livesession/kernel/metadata", F_OK) != 0) {
- fprintf(stderr,"NO METADATA FILE, SKIPPING\n");
- return;
- }
- metadata_ready = 1;
- metadata_fp = fopen("/tmp/livesession/kernel/metadata", "r");
- }
-
- if (!trace_opened) {
- //bt_ctx = bt_context_create();
-// ret = bt_context_add_trace(ctx, NULL, "ctf", ctf_move_mmap_pos_slow, mmap_list, metadata_fp);
- trace_opened = 1;
- }
- //iter_trace(bt_ctx);
-
-end:
- return;
-}
-