/* list of snapshots currently not consumed */
GPtrArray *available_snapshots;
sem_t metadata_available;
-FILE *metadata_fp;
-int trace_opened = 0;
-int metadata_ready = 0;
+int reload_trace = 0;
enum {
OPT_NONE = 0,
sem_wait(&pause_sem);
if (quit) {
+ sem_post(&pause_sem);
+ sem_post(&timer);
reset_ncurses();
pthread_exit(0);
}
-
copy = g_ptr_array_index(copies, current_display_index);
assert(copy);
display(current_display_index++);
NULL, NULL, NULL);
}
- while (((event = bt_ctf_iter_read_event(iter)) != NULL)) {
- if (quit)
+ while ((event = bt_ctf_iter_read_event(iter)) != NULL) {
+ if (quit || reload_trace)
goto end_iter;
ret = bt_iter_next(bt_ctf_get_iter(iter));
if (ret < 0)
ret = 0;
}
+ reload_trace = 1;
+
end:
return ret;
}
void live_consume(struct bt_context **bt_ctx)
{
int ret;
+ FILE *metadata_fp;
- if (!metadata_ready) {
- sem_wait(&metadata_available);
- if (access("/tmp/livesession/kernel/metadata", F_OK) != 0) {
- fprintf(stderr,"no metadata\n");
- goto end;
- }
- metadata_ready = 1;
- metadata_fp = fopen("/tmp/livesession/kernel/metadata", "r");
+ sem_wait(&metadata_available);
+ if (access("/tmp/livesession/kernel/metadata", F_OK) != 0) {
+ fprintf(stderr,"no metadata\n");
+ goto end;
}
+ 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");
- goto end;
- }
- trace_opened = 1;
+ *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");
+ goto end;
}
end:
return ret;
}
-void *setup_live_tracing()
+int setup_live_tracing()
{
struct lttng_domain dom;
struct lttng_channel chan;
if ((ret = setup_consumer(command_sock_path, threads, ctx)) < 0) {
fprintf(stderr,"error setting up consumer\n");
- goto end;
+ goto error;
}
available_snapshots = g_ptr_array_new();
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;
+ goto error;
}
if ((handle = lttng_create_handle("test", &dom)) == NULL) {
fprintf(stderr,"error creating handle\n");
- goto end;
+ goto error_session;
+ }
+
+ /*
+ * FIXME : need to let the
+ * helper_lttng_consumer_thread_receive_fds create the
+ * socket.
+ * Cleaner solution ?
+ */
+ while (access(command_sock_path, F_OK)) {
+ sleep(0.1);
}
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;
+ goto error_session;
}
strcpy(chan.name, channel_name);
if ((ret = lttng_enable_channel(handle, &chan)) < 0) {
fprintf(stderr,"error creating channel : %s\n",
helper_lttcomm_get_readable_code(ret));
- goto end;
+ goto error_session;
}
memset(&ev, '\0', sizeof(struct lttng_event));
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;
+ goto error_session;
}
ev.type = LTTNG_EVENT_SYSCALL;
if ((ret = lttng_enable_event(handle, &ev, channel_name)) < 0) {
fprintf(stderr,"error enabling syscalls : %s\n",
helper_lttcomm_get_readable_code(ret));
- goto end;
+ goto error_session;
}
kctxpid.ctx = LTTNG_EVENT_CONTEXT_PID;
if ((ret = lttng_start_tracing("test")) < 0) {
fprintf(stderr,"error starting tracing : %s\n",
helper_lttcomm_get_readable_code(ret));
- goto end;
+ goto error_session;
}
helper_kernctl_buffer_flush(consumerd_metadata);
/* block until metadata is ready */
sem_init(&metadata_available, 0, 0);
-end:
- return NULL;
+ return 0;
+
+error_session:
+ lttng_destroy_session("test");
+error:
+ return -1;
}
int main(int argc, char **argv)
{
int ret;
struct bt_context *bt_ctx = NULL;
+ struct mmap_stream *mmap_info;
+ unsigned long mmap_len;
ret = parse_options(argc, argv);
if (ret < 0) {
}
if (!opt_input_path) {
- setup_live_tracing();
+ ret = setup_live_tracing();
+ if (ret < 0) {
+ goto end;
+ }
init_lttngtop();
if (!opt_textdump) {
pthread_create(&display_thread, NULL, ncurses_display, (void *) NULL);
pthread_create(&timer_thread, NULL, refresh_thread, (void *) NULL);
}
- live_consume(&bt_ctx);
- iter_trace(bt_ctx);
+ while (!quit) {
+ reload_trace = 0;
+ live_consume(&bt_ctx);
+ iter_trace(bt_ctx);
+ ret = bt_context_remove_trace(bt_ctx, 0);
+ if (ret != 0)
+ fprintf(stderr, "error removing trace\n");
+ if (bt_ctx) {
+ bt_context_put(bt_ctx);
+ }
+
+ /*
+ * since we receive all FDs every time there is an
+ * update and the FD number is different every time,
+ * we don't know which one are valid.
+ * so we check if all FDs are usable with a simple
+ * ioctl call.
+ */
+ bt_list_for_each_entry(mmap_info, &mmap_list.head, list) {
+ ret = helper_kernctl_get_mmap_len(mmap_info->fd, &mmap_len);
+ if (ret != 0) {
+ bt_list_del(&mmap_info->list);
+ }
+ }
+ sem_post(&metadata_available);
+ }
pthread_join(timer_thread, NULL);
quit = 1;
projects / lttngtop.git / blobdiff