X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=src%2Fbin%2Flttng-sessiond%2Fcmd.c;h=f152c1c2ed191269a19aace219679916a88e0cfb;hb=ef440343c0d6372c1aaca74d0cdecfcd700a5785;hp=7af855eacb14e13b204730cdd2848f888c3bc352;hpb=343defc2671db532be8a9eed84907fd2e4044f0e;p=lttng-tools.git diff --git a/src/bin/lttng-sessiond/cmd.c b/src/bin/lttng-sessiond/cmd.c index 7af855eac..f152c1c2e 100644 --- a/src/bin/lttng-sessiond/cmd.c +++ b/src/bin/lttng-sessiond/cmd.c @@ -1442,12 +1442,14 @@ error: } /* - * Command LTTNG_TRACK_PID processed by the client thread. + * Command LTTNG_TRACK_ID processed by the client thread. * * Called with session lock held. */ -int cmd_track_pid(struct ltt_session *session, enum lttng_domain_type domain, - int pid) +int cmd_track_id(struct ltt_session *session, + enum lttng_tracker_type tracker_type, + enum lttng_domain_type domain, + const struct lttng_tracker_id *id) { int ret; @@ -1460,7 +1462,7 @@ int cmd_track_pid(struct ltt_session *session, enum lttng_domain_type domain, ksess = session->kernel_session; - ret = kernel_track_pid(ksess, pid); + ret = kernel_track_id(tracker_type, ksess, id); if (ret != LTTNG_OK) { goto error; } @@ -1474,7 +1476,7 @@ int cmd_track_pid(struct ltt_session *session, enum lttng_domain_type domain, usess = session->ust_session; - ret = trace_ust_track_pid(usess, pid); + ret = trace_ust_track_id(tracker_type, usess, id); if (ret != LTTNG_OK) { goto error; } @@ -1493,12 +1495,14 @@ error: } /* - * Command LTTNG_UNTRACK_PID processed by the client thread. + * Command LTTNG_UNTRACK_ID processed by the client thread. * * Called with session lock held. */ -int cmd_untrack_pid(struct ltt_session *session, enum lttng_domain_type domain, - int pid) +int cmd_untrack_id(struct ltt_session *session, + enum lttng_tracker_type tracker_type, + enum lttng_domain_type domain, + const struct lttng_tracker_id *id) { int ret; @@ -1511,7 +1515,7 @@ int cmd_untrack_pid(struct ltt_session *session, enum lttng_domain_type domain, ksess = session->kernel_session; - ret = kernel_untrack_pid(ksess, pid); + ret = kernel_untrack_id(tracker_type, ksess, id); if (ret != LTTNG_OK) { goto error; } @@ -1525,7 +1529,7 @@ int cmd_untrack_pid(struct ltt_session *session, enum lttng_domain_type domain, usess = session->ust_session; - ret = trace_ust_untrack_pid(usess, pid); + ret = trace_ust_untrack_id(tracker_type, usess, id); if (ret != LTTNG_OK) { goto error; } @@ -2573,12 +2577,14 @@ ssize_t cmd_list_syscalls(struct lttng_event **events) } /* - * Command LTTNG_LIST_TRACKER_PIDS processed by the client thread. + * Command LTTNG_LIST_TRACKER_IDS processed by the client thread. * * Called with session lock held. */ -ssize_t cmd_list_tracker_pids(struct ltt_session *session, - enum lttng_domain_type domain, int32_t **pids) +ssize_t cmd_list_tracker_ids(enum lttng_tracker_type tracker_type, + struct ltt_session *session, + enum lttng_domain_type domain, + struct lttng_tracker_id **ids) { int ret; ssize_t nr_pids = 0; @@ -2589,7 +2595,7 @@ ssize_t cmd_list_tracker_pids(struct ltt_session *session, struct ltt_kernel_session *ksess; ksess = session->kernel_session; - nr_pids = kernel_list_tracker_pids(ksess, pids); + nr_pids = kernel_list_tracker_ids(tracker_type, ksess, ids); if (nr_pids < 0) { ret = LTTNG_ERR_KERN_LIST_FAIL; goto error; @@ -2601,7 +2607,7 @@ ssize_t cmd_list_tracker_pids(struct ltt_session *session, struct ltt_ust_session *usess; usess = session->ust_session; - nr_pids = trace_ust_list_tracker_pids(usess, pids); + nr_pids = trace_ust_list_tracker_ids(tracker_type, usess, ids); if (nr_pids < 0) { ret = LTTNG_ERR_UST_LIST_FAIL; goto error; @@ -2636,6 +2642,8 @@ int cmd_start_trace(struct ltt_session *session) struct ltt_ust_session *usess; const bool session_rotated_after_last_stop = session->rotated_after_last_stop; + const bool session_cleared_after_last_stop = + session->cleared_after_last_stop; assert(session); @@ -2682,6 +2690,7 @@ int cmd_start_trace(struct ltt_session *session) session->active = 1; session->rotated_after_last_stop = false; + session->cleared_after_last_stop = false; if (session->output_traces && !session->current_trace_chunk) { if (!session->has_been_started) { struct lttng_trace_chunk *trace_chunk; @@ -2770,6 +2779,8 @@ error: /* Restore initial state on error. */ session->rotated_after_last_stop = session_rotated_after_last_stop; + session->cleared_after_last_stop = + session_cleared_after_last_stop; } return ret; } @@ -3323,9 +3334,7 @@ int cmd_destroy_session(struct ltt_session *session, session->rotate_size = 0; } - if (session->most_recent_chunk_id.is_set && - session->most_recent_chunk_id.value != 0 && - session->current_trace_chunk && session->output_traces) { + if (session->rotated && session->current_trace_chunk && session->output_traces) { /* * Perform a last rotation on destruction if rotations have * occurred during the session's lifetime. @@ -4710,7 +4719,13 @@ enum lttng_error_code snapshot_record(struct ltt_session *session, } } - if (session_close_trace_chunk(session, session->current_trace_chunk, + if (session_set_trace_chunk(session, NULL, &snapshot_trace_chunk)) { + ERR("Failed to release the current trace chunk of session \"%s\"", + session->name); + ret_code = LTTNG_ERR_UNK; + } + + if (session_close_trace_chunk(session, snapshot_trace_chunk, LTTNG_TRACE_CHUNK_COMMAND_TYPE_NO_OPERATION, NULL)) { /* * Don't goto end; make sure the chunk is closed for the session @@ -4720,11 +4735,6 @@ enum lttng_error_code snapshot_record(struct ltt_session *session, session->name); ret_code = LTTNG_ERR_CLOSE_TRACE_CHUNK_FAIL_CONSUMER; } - if (session_set_trace_chunk(session, NULL, NULL)) { - ERR("Failed to release the current trace chunk of session \"%s\"", - session->name); - ret_code = LTTNG_ERR_UNK; - } error: if (original_ust_consumer_output) { session->ust_session->consumer = original_ust_consumer_output; @@ -4967,6 +4977,18 @@ int cmd_rotate_session(struct ltt_session *session, cmd_ret = LTTNG_ERR_ROTATION_MULTIPLE_AFTER_STOP; goto end; } + + /* + * After a stop followed by a clear, disallow following rotations a they would + * generate empty chunks. + */ + if (session->cleared_after_last_stop) { + DBG("Session \"%s\" was already cleared after stop, refusing rotation", + session->name); + cmd_ret = LTTNG_ERR_ROTATION_AFTER_STOP_CLEAR; + goto end; + } + if (session->active) { new_trace_chunk = session_create_new_trace_chunk(session, NULL, NULL, NULL);