-
- return ret;
-}
-
-void dump_snapshot()
-{
-#if 0
- 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));
- printf("Taking snapshot of fd : %d\n", 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);
- 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 (helper_get_lttng_consumer_stream_wait_last_pos(iter) < spos) {
- new_snapshot = g_new0(struct mmap_stream, 1);
- new_snapshot->fd = helper_get_lttng_consumer_stream_wait_fd(iter);
- new_snapshot->last_pos = helper_get_lttng_consumer_stream_wait_last_pos(iter);
- fprintf(stderr,"ADDING AVAILABLE SNAPSHOT ON FD %d AT POSITION %lu\n",
- new_snapshot->fd,
- new_snapshot->last_pos);
- g_ptr_array_add(available_snapshots, new_snapshot);
- helper_set_lttng_consumer_stream_wait_last_pos(iter,
- helper_get_lttng_consumer_stream_wait_last_pos(iter) +
- helper_get_lttng_consumer_stream_chan_max_sb_size(iter));
- }
- }
-
- 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");
- }
-
-
-end:
- return;
-#endif
-}
-
-ssize_t read_subbuffer(struct lttng_consumer_stream *kconsumerd_fd,
- struct lttng_consumer_local_data *ctx)
-{
- unsigned long len;
- int err;
- long ret = 0;
- int infd = helper_get_lttng_consumer_stream_wait_fd(kconsumerd_fd);
-
- if (helper_get_lttng_consumer_stream_output(kconsumerd_fd) == LTTNG_EVENT_SPLICE) {
- /* Get the next subbuffer */
- printf("get_next : %d\n", infd);
- err = helper_kernctl_get_next_subbuf(infd);
- if (err != 0) {
- ret = errno;
- perror("Reserving sub buffer failed (everything is normal, "
- "it is due to concurrency)");
- goto end;
- }
- /* read the whole subbuffer */
- err = helper_kernctl_get_padded_subbuf_size(infd, &len);
- if (err != 0) {
- ret = errno;
- perror("Getting sub-buffer len failed.");
- goto end;
- }
- printf("len : %ld\n", len);
-
- /* splice the subbuffer to the tracefile */
- ret = helper_lttng_consumer_on_read_subbuffer_splice(ctx, kconsumerd_fd, len);
- if (ret < 0) {
- /*
- * display the error but continue processing to try
- * to release the subbuffer
- */
- fprintf(stderr,"Error splicing to tracefile\n");
- }
- printf("ret : %ld\n", ret);
- printf("put_next : %d\n", infd);
- err = helper_kernctl_put_next_subbuf(infd);
- if (err != 0) {
- ret = errno;
- perror("Reserving sub buffer failed (everything is normal, "
- "it is due to concurrency)");
- goto end;
- }
- sem_post(&metadata_available);
- }
-
-end:
- return 0;
-}
-
-int on_update_fd(int key, uint32_t state)
-{
- /* let the lib handle the metadata FD */
- if (key == sessiond_metadata)
- return 0;
- return 1;
-}
-
-int on_recv_fd(struct lttng_consumer_stream *kconsumerd_fd)
-{
- int ret;
- struct mmap_stream *new_info;
- size_t tmp_mmap_len;
-
- /* Opening the tracefile in write mode */
- if (helper_get_lttng_consumer_stream_path_name(kconsumerd_fd) != NULL) {
- ret = open(helper_get_lttng_consumer_stream_path_name(kconsumerd_fd),
- O_WRONLY|O_CREAT|O_TRUNC, S_IRWXU|S_IRWXG|S_IRWXO);
- if (ret < 0) {
- perror("open");
- goto end;
- }
- helper_set_lttng_consumer_stream_out_fd(kconsumerd_fd, ret);
- }
-
- if (helper_get_lttng_consumer_stream_output(kconsumerd_fd) == LTTNG_EVENT_MMAP) {
- new_info = malloc(sizeof(struct mmap_stream));
- new_info->fd = helper_get_lttng_consumer_stream_wait_fd(kconsumerd_fd);
- bt_list_add(&new_info->list, &mmap_list.head);
-
- /* get the len of the mmap region */
- ret = helper_kernctl_get_mmap_len(helper_get_lttng_consumer_stream_wait_fd(kconsumerd_fd),
- &tmp_mmap_len);
- if (ret != 0) {
- ret = errno;
- perror("helper_kernctl_get_mmap_len");
- goto end;
- }
- helper_set_lttng_consumer_stream_mmap_len(kconsumerd_fd, tmp_mmap_len);
-
- helper_set_lttng_consumer_stream_mmap_base(kconsumerd_fd,
- mmap(NULL, helper_get_lttng_consumer_stream_mmap_len(kconsumerd_fd),
- PROT_READ, MAP_PRIVATE, helper_get_lttng_consumer_stream_wait_fd(kconsumerd_fd), 0));
- if (helper_get_lttng_consumer_stream_mmap_base(kconsumerd_fd) == MAP_FAILED) {
- perror("Error mmaping");
- ret = -1;
- goto end;
- }
-
- g_ptr_array_add(lttng_consumer_stream_array, kconsumerd_fd);
- ret = 0;
- } else {
- consumerd_metadata = helper_get_lttng_consumer_stream_wait_fd(kconsumerd_fd);
- sessiond_metadata = helper_get_lttng_consumer_stream_key(kconsumerd_fd);
- ret = 0;
- }
-
-end:
- return ret;
-}
-
-void *live_consume()
-{
- struct bt_context *bt_ctx = NULL;
- int ret;
-
- while (1) {
-// dump_snapshot();
-
- 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 NULL;
- }
- metadata_ready = 1;
- metadata_fp = fopen("/tmp/livesession/kernel/metadata", "r");
- }
-
- if (!trace_opened) {
- bt_ctx = bt_context_create();
- ret = bt_context_add_trace(bt_ctx, NULL, "ctf",
- lttngtop_ctf_packet_seek, &mmap_list, metadata_fp);
- if (ret < 0) {
- printf("Error adding trace\n");
- return NULL;
- }
- trace_opened = 1;
- }
- iter_trace(bt_ctx);
- sleep(1);
- }
-}
-
-int setup_consumer(char *command_sock_path, pthread_t *threads,
- struct lttng_consumer_local_data *ctx)
-{
- int ret = 0;
-
- ctx = helper_lttng_consumer_create(HELPER_LTTNG_CONSUMER_KERNEL,
- read_subbuffer, NULL, on_recv_fd, on_update_fd);
- if (!ctx)
- goto end;
-
- unlink(command_sock_path);
- helper_lttng_consumer_set_command_sock_path(ctx, command_sock_path);
- helper_lttng_consumer_init();
-
- /* Create the thread to manage the receive of fd */
- ret = pthread_create(&threads[0], NULL, helper_lttng_consumer_thread_receive_fds,
- (void *) ctx);
- if (ret != 0) {
- perror("pthread_create receive fd");
- goto end;
- }
- /* Create thread to manage the polling/writing of traces */
- ret = pthread_create(&threads[1], NULL, helper_lttng_consumer_thread_poll_fds,
- (void *) ctx);
- if (ret != 0) {
- perror("pthread_create poll fd");
- goto end;