- return ret;
-}
-
-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;
-
- printf("Receiving %d\n", helper_get_lttng_consumer_stream_wait_fd(kconsumerd_fd));
- /* 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);
- printf("mmap len : %ld\n", 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 = 1;
- } 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;
-}
-
-
-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");
- 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");
- goto end;
- }
-
-end:
- return ret;
-}
-
-int setup_live_tracing()
-{
- struct lttng_domain dom;
- struct lttng_channel chan;
- char *channel_name = "mmapchan";
- struct lttng_consumer_local_data *ctx = NULL;
- struct lttng_event ev;
- int ret = 0;
- char *command_sock_path = "/tmp/consumerd_sock";
- static pthread_t threads[2]; /* recv_fd, poll */
- struct lttng_event_context kctxpid, kctxcomm, kctxppid, kctxtid;
- /* list of snapshots currently not consumed */
- GPtrArray *available_snapshots;
-
- struct lttng_handle *handle;
-
- BT_INIT_LIST_HEAD(&mmap_list.head);
-
- lttng_consumer_stream_array = g_ptr_array_new();
-
- if ((ret = setup_consumer(command_sock_path, threads, ctx)) < 0) {
- fprintf(stderr,"error setting up consumer\n");
- goto end;
- }
-
- available_snapshots = g_ptr_array_new();
-
- /* setup the session */
- dom.type = LTTNG_DOMAIN_KERNEL;
-
- ret = system("rm -rf /tmp/livesession");
-
- if ((ret = lttng_create_session("test", "/tmp/livesession")) < 0) {
- fprintf(stderr,"error creating the session : %s\n",
- helper_lttcomm_get_readable_code(ret));
- goto end;
- }
-
- if ((handle = lttng_create_handle("test", &dom)) == NULL) {
- fprintf(stderr,"error creating handle\n");
- goto end;
- }
-
- if ((ret = lttng_register_consumer(handle, command_sock_path)) < 0) {
- fprintf(stderr,"error registering consumer : %s\n",
- helper_lttcomm_get_readable_code(ret));
- goto end;
- }
-
- strcpy(chan.name, channel_name);
- chan.attr.overwrite = 1;
-// chan.attr.subbuf_size = 32768;
- chan.attr.subbuf_size = 1048576; /* 1MB */
- chan.attr.num_subbuf = 4;
- chan.attr.switch_timer_interval = 0;
- chan.attr.read_timer_interval = 200;
- chan.attr.output = LTTNG_EVENT_MMAP;
-
- if ((ret = lttng_enable_channel(handle, &chan)) < 0) {
- fprintf(stderr,"error creating channel : %s\n", helper_lttcomm_get_readable_code(ret));
- goto end;
- }
-
- sprintf(ev.name, "sched_switch");
- ev.type = LTTNG_EVENT_TRACEPOINT;
-
- //if ((ret = lttng_enable_event(handle, NULL, channel_name)) < 0) {
- if ((ret = lttng_enable_event(handle, &ev, channel_name)) < 0) {
- fprintf(stderr,"error enabling event : %s\n", helper_lttcomm_get_readable_code(ret));
- goto end;
- }
-
- kctxpid.ctx = LTTNG_EVENT_CONTEXT_PID;
- lttng_add_context(handle, &kctxpid, NULL, NULL);
- kctxppid.ctx = LTTNG_EVENT_CONTEXT_PPID;
- lttng_add_context(handle, &kctxppid, NULL, NULL);
- kctxcomm.ctx = LTTNG_EVENT_CONTEXT_PROCNAME;
- lttng_add_context(handle, &kctxcomm, NULL, NULL);
- kctxtid.ctx = LTTNG_EVENT_CONTEXT_TID;
- lttng_add_context(handle, &kctxtid, NULL, NULL);
-
- if ((ret = lttng_start_tracing("test")) < 0) {
- fprintf(stderr,"error starting tracing : %s\n", helper_lttcomm_get_readable_code(ret));
- goto end;
- }
-
- helper_kernctl_buffer_flush(consumerd_metadata);
- sleep(10);
-
- lttng_stop_tracing("test");
- lttng_destroy_session("test");
-
- /* block until metadata is ready */
- //sem_init(&metadata_available, 0, 0);
-
- //init_lttngtop();
-