+ struct lttng_event cur_event;
+
+ memset(&domain, 0, sizeof(domain));
+ memset(&cur_event, 0, sizeof(cur_event));
+
+ DBG("Getting UST tracing event fields");
+
+ domain.type = LTTNG_DOMAIN_UST;
+
+ handle = lttng_create_handle(NULL, &domain);
+ if (handle == NULL) {
+ ret = CMD_ERROR;
+ goto end;
+ }
+
+ size = lttng_list_tracepoint_fields(handle, &event_field_list);
+ if (size < 0) {
+ ERR("Unable to list UST event fields: %s", lttng_strerror(size));
+ ret = CMD_ERROR;
+ goto end;
+ }
+
+ if (lttng_opt_mi) {
+ /* Mi print */
+ ret = mi_list_ust_event_fields(event_field_list, size, &domain);
+ if (ret) {
+ ret = CMD_ERROR;
+ goto error;
+ }
+ } else {
+ /* Pretty print */
+ MSG("UST events:\n-------------");
+
+ if (size == 0) {
+ MSG("None");
+ }
+
+ for (i = 0; i < size; i++) {
+ if (cur_pid != event_field_list[i].event.pid) {
+ cur_pid = event_field_list[i].event.pid;
+ cmdline = get_cmdline_by_pid(cur_pid);
+ if (cmdline == NULL) {
+ ret = CMD_ERROR;
+ goto error;
+ }
+ MSG("\nPID: %d - Name: %s", cur_pid, cmdline);
+ free(cmdline);
+ /* Wipe current event since we are about to print a new PID. */
+ memset(&cur_event, 0, sizeof(cur_event));
+ }
+ if (strcmp(cur_event.name, event_field_list[i].event.name) != 0) {
+ print_events(&event_field_list[i].event);
+ memcpy(&cur_event, &event_field_list[i].event,
+ sizeof(cur_event));
+ }
+ print_event_field(&event_field_list[i]);
+ }
+
+ MSG("");
+ }
+
+error:
+ free(event_field_list);
+end:
+ lttng_destroy_handle(handle);
+ return ret;
+}
+
+/*
+ * Machine interface
+ * Print a list of kernel events
+ */
+static int mi_list_kernel_events(struct lttng_event *events, int count,
+ struct lttng_domain *domain)
+{
+ int ret, i;
+
+ /* Open domains element */
+ ret = mi_lttng_domains_open(writer);
+ if (ret) {
+ goto end;
+ }
+
+ /* Write domain */
+ ret = mi_lttng_domain(writer, domain, 1);
+ if (ret) {
+ goto end;
+ }
+
+ /* Open events */
+ ret = mi_lttng_events_open(writer);
+ if (ret) {
+ goto end;
+ }
+
+ for (i = 0; i < count; i++) {
+ ret = mi_lttng_event(writer, &events[i], 0, handle->domain.type);
+ if (ret) {
+ goto end;
+ }
+ }
+
+ /* close events, domain and domains */
+ ret = mi_lttng_close_multi_element(writer, 3);
+ if (ret) {
+ goto end;
+ }
+
+end:
+ return ret;
+}
+
+/*
+ * Ask for all trace events in the kernel
+ */
+static int list_kernel_events(void)
+{
+ int i, size, ret = CMD_SUCCESS;
+ struct lttng_domain domain;
+ struct lttng_handle *handle;
+ struct lttng_event *event_list;
+
+ memset(&domain, 0, sizeof(domain));
+
+ DBG("Getting kernel tracing events");
+
+ domain.type = LTTNG_DOMAIN_KERNEL;
+
+ handle = lttng_create_handle(NULL, &domain);
+ if (handle == NULL) {
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ size = lttng_list_tracepoints(handle, &event_list);
+ if (size < 0) {
+ ERR("Unable to list kernel events: %s", lttng_strerror(size));
+ lttng_destroy_handle(handle);
+ return CMD_ERROR;
+ }
+
+ if (lttng_opt_mi) {
+ /* Mi print */
+ ret = mi_list_kernel_events(event_list, size, &domain);
+ if (ret) {
+ ret = CMD_ERROR;
+ goto end;
+ }
+ } else {
+ MSG("Kernel events:\n-------------");
+
+ for (i = 0; i < size; i++) {
+ print_events(&event_list[i]);
+ }
+
+ MSG("");
+ }
+
+end:
+ free(event_list);
+
+ lttng_destroy_handle(handle);
+ return ret;
+
+error:
+ lttng_destroy_handle(handle);
+ return ret;
+}
+
+/*
+ * Machine interface
+ * Print a list of system calls.
+ */
+static int mi_list_syscalls(struct lttng_event *events, int count)
+{
+ int ret, i;
+
+ /* Open events */
+ ret = mi_lttng_events_open(writer);
+ if (ret) {
+ goto end;
+ }
+
+ for (i = 0; i < count; i++) {
+ ret = mi_lttng_event(writer, &events[i], 0, handle->domain.type);
+ if (ret) {
+ goto end;
+ }
+ }
+
+ /* Close events. */
+ ret = mi_lttng_writer_close_element(writer);
+ if (ret) {
+ goto end;
+ }
+
+end:
+ return ret;
+}
+
+/*
+ * Ask for kernel system calls.
+ */
+static int list_syscalls(void)
+{
+ int i, size, ret = CMD_SUCCESS;
+ struct lttng_event *event_list;
+
+ DBG("Getting kernel system call events");
+
+ size = lttng_list_syscalls(&event_list);
+ if (size < 0) {
+ ERR("Unable to list system calls: %s", lttng_strerror(size));
+ ret = CMD_ERROR;
+ goto error;
+ }
+
+ if (lttng_opt_mi) {
+ /* Mi print */
+ ret = mi_list_syscalls(event_list, size);
+ if (ret) {
+ ret = CMD_ERROR;
+ goto end;
+ }
+ } else {
+ MSG("System calls:\n-------------");
+
+ for (i = 0; i < size; i++) {
+ print_events(&event_list[i]);
+ }
+
+ MSG("");
+ }
+
+end:
+ free(event_list);
+ return ret;
+
+error:
+ return ret;
+}
+
+/*
+ * Machine Interface
+ * Print a list of agent events
+ */
+static int mi_list_session_agent_events(struct lttng_event *events, int count)
+{
+ int ret, i;
+
+ /* Open events element */
+ ret = mi_lttng_events_open(writer);
+ if (ret) {
+ goto end;
+ }
+
+ for (i = 0; i < count; i++) {
+ ret = mi_lttng_event(writer, &events[i], 0, handle->domain.type);
+ if (ret) {
+ goto end;
+ }
+ }
+
+ /* Close events element */
+ ret = mi_lttng_writer_close_element(writer);
+
+end:
+ return ret;
+}
+
+/*
+ * List agent events for a specific session using the handle.
+ *
+ * Return CMD_SUCCESS on success else a negative value.
+ */
+static int list_session_agent_events(void)
+{
+ int ret = CMD_SUCCESS, count, i;
+ struct lttng_event *events = NULL;
+
+ count = lttng_list_events(handle, "", &events);
+ if (count < 0) {
+ ret = CMD_ERROR;
+ ERR("%s", lttng_strerror(count));
+ goto error;
+ }
+
+ if (lttng_opt_mi) {
+ /* Mi print */
+ ret = mi_list_session_agent_events(events, count);
+ if (ret) {
+ ret = CMD_ERROR;
+ goto end;
+ }
+ } else {
+ /* Pretty print */
+ MSG("Events (Logger name):\n---------------------");
+ if (count == 0) {
+ MSG("%sNone\n", indent6);
+ goto end;
+ }
+
+ for (i = 0; i < count; i++) {
+ const char *filter_str;
+ char *filter_msg = NULL;
+ struct lttng_event *event = &events[i];
+
+ ret = lttng_event_get_filter_expression(event,
+ &filter_str);
+ if (ret) {
+ filter_msg = strdup(" [failed to retrieve filter]");
+ } else if (filter_str) {
+ const char * const filter_fmt =
+ " [filter: '%s']";
+
+ filter_msg = malloc(strlen(filter_str) +
+ strlen(filter_fmt) + 1);
+ if (filter_msg) {
+ sprintf(filter_msg, filter_fmt,
+ filter_str);
+ }
+ }
+
+ if (event->loglevel_type !=
+ LTTNG_EVENT_LOGLEVEL_ALL) {
+ MSG("%s- %s%s (loglevel%s %s)%s", indent4,
+ event->name,
+ enabled_string(event->enabled),
+ logleveltype_string(
+ event->loglevel_type),
+ mi_lttng_loglevel_string(
+ event->loglevel,
+ handle->domain.type),
+ safe_string(filter_msg));
+ } else {
+ MSG("%s- %s%s%s", indent4, event->name,
+ enabled_string(event->enabled),
+ safe_string(filter_msg));
+ }
+ free(filter_msg);
+ }
+
+ MSG("");
+ }
+
+end:
+ free(events);
+error:
+ return ret;
+}
+
+/*
+ * Machine interface
+ * print a list of event
+ */
+static int mi_list_events(struct lttng_event *events, int count)
+{
+ int ret, i;
+
+ /* Open events element */
+ ret = mi_lttng_events_open(writer);
+ if (ret) {
+ goto end;
+ }
+
+ for (i = 0; i < count; i++) {
+ ret = mi_lttng_event(writer, &events[i], 0, handle->domain.type);
+ if (ret) {
+ goto end;
+ }
+ }
+
+ /* Close events element */
+ ret = mi_lttng_writer_close_element(writer);
+
+end:
+ return ret;
+}
+
+/*
+ * List events of channel of session and domain.
+ */
+static int list_events(const char *channel_name)
+{
+ int ret = CMD_SUCCESS, count, i;
+ struct lttng_event *events = NULL;
+
+ count = lttng_list_events(handle, channel_name, &events);
+ if (count < 0) {
+ ret = CMD_ERROR;
+ ERR("%s", lttng_strerror(count));
+ goto error;
+ }
+
+ if (lttng_opt_mi) {
+ /* Mi print */
+ ret = mi_list_events(events, count);
+ if (ret) {
+ ret = CMD_ERROR;
+ goto end;
+ }
+ } else {
+ /* Pretty print */
+ MSG("\n%sEvents:", indent4);
+ if (count == 0) {
+ MSG("%sNone\n", indent6);
+ goto end;
+ }
+
+ for (i = 0; i < count; i++) {
+ print_events(&events[i]);
+ }
+
+ MSG("");
+ }
+end:
+ free(events);
+error:
+ return ret;
+}
+
+/*
+ * Pretty print channel
+ */
+static void print_channel(struct lttng_channel *channel)
+{
+ int ret;
+ uint64_t discarded_events, lost_packets, monitor_timer_interval;
+
+ ret = lttng_channel_get_discarded_event_count(channel,
+ &discarded_events);
+ if (ret) {
+ ERR("Failed to retrieve discarded event count of channel");
+ return;
+ }
+
+ ret = lttng_channel_get_lost_packet_count(channel,
+ &lost_packets);
+ if (ret) {
+ ERR("Failed to retrieve lost packet count of channel");
+ return;
+ }
+
+ ret = lttng_channel_get_monitor_timer_interval(channel,
+ &monitor_timer_interval);
+ if (ret) {
+ ERR("Failed to retrieve monitor interval of channel");
+ return;
+ }
+
+ MSG("- %s:%s\n", channel->name, enabled_string(channel->enabled));
+
+ MSG("%sAttributes:", indent4);
+ MSG("%soverwrite mode: %d", indent6, channel->attr.overwrite);
+ MSG("%ssubbuffers size: %" PRIu64, indent6, channel->attr.subbuf_size);
+ MSG("%snumber of subbuffers: %" PRIu64, indent6, channel->attr.num_subbuf);
+ MSG("%sswitch timer interval: %u", indent6, channel->attr.switch_timer_interval);
+ MSG("%sread timer interval: %u", indent6, channel->attr.read_timer_interval);
+ MSG("%smonitor timer interval: %" PRIu64, indent6, monitor_timer_interval);
+ MSG("%strace file count: %" PRIu64, indent6, channel->attr.tracefile_count);
+ MSG("%strace file size (bytes): %" PRIu64, indent6, channel->attr.tracefile_size);
+ MSG("%sdiscarded events: %" PRIu64, indent6, discarded_events);
+ MSG("%slost packets: %" PRIu64, indent6, lost_packets);
+ switch (channel->attr.output) {
+ case LTTNG_EVENT_SPLICE:
+ MSG("%soutput: splice()", indent6);
+ break;
+ case LTTNG_EVENT_MMAP:
+ MSG("%soutput: mmap()", indent6);
+ break;
+ }
+}
+
+/*
+ * Machine interface
+ * Print a list of channel
+ *
+ */
+static int mi_list_channels(struct lttng_channel *channels, int count,
+ const char *channel_name)
+{
+ int i, ret;
+ unsigned int chan_found = 0;
+
+ /* Open channels element */
+ ret = mi_lttng_channels_open(writer);
+ if (ret) {
+ goto error;
+ }
+
+ for (i = 0; i < count; i++) {
+ if (channel_name != NULL) {
+ if (strncmp(channels[i].name, channel_name, NAME_MAX) == 0) {
+ chan_found = 1;
+ } else {
+ continue;
+ }
+ }
+
+ /* Write channel element and leave it open */
+ ret = mi_lttng_channel(writer, &channels[i], 1);
+ if (ret) {
+ goto error;
+ }
+
+ /* Listing events per channel */
+ ret = list_events(channels[i].name);
+ if (ret) {
+ goto error;
+ }
+
+ /* Closing the channel element we opened earlier */
+ ret = mi_lttng_writer_close_element(writer);
+ if (ret) {
+ goto error;
+ }
+
+ if (chan_found) {
+ break;
+ }
+ }
+
+ /* Close channels element */
+ ret = mi_lttng_writer_close_element(writer);
+ if (ret) {
+ goto error;
+ }
+
+error:
+ return ret;
+}
+
+/*
+ * List channel(s) of session and domain.
+ *
+ * If channel_name is NULL, all channels are listed.
+ */
+static int list_channels(const char *channel_name)
+{
+ int count, i, ret = CMD_SUCCESS;
+ unsigned int chan_found = 0;
+ struct lttng_channel *channels = NULL;
+
+ DBG("Listing channel(s) (%s)", channel_name ? : "<all>");