2 * Copyright (C) 2011-2012 Julien Desfossez
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License Version 2 as
6 * published by the Free Software Foundation;
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
22 #include <babeltrace/babeltrace.h>
23 #include <babeltrace/ctf/events.h>
24 #include <babeltrace/ctf/callbacks.h>
25 #include <babeltrace/ctf/iterator.h>
37 #include <sys/types.h>
41 #include <lttng/lttng.h>
42 #include <lttng/lttngtop-helper.h>
44 #include "lttngtoptypes.h"
46 #include "iostreamtop.h"
47 #include "cursesdisplay.h"
50 #define DEFAULT_FILE_ARRAY_SIZE 1
52 const char *opt_input_path
;
54 struct lttngtop
*copy
;
55 pthread_t display_thread
;
56 pthread_t timer_thread
;
58 unsigned long refresh_display
= 1 * NSEC_PER_SEC
;
59 unsigned long last_display_update
= 0;
63 /* list of FDs available for being read with snapshots */
64 struct mmap_stream_list mmap_list
;
65 GPtrArray
*lttng_consumer_stream_array
;
66 int sessiond_metadata
, consumerd_metadata
;
67 struct lttng_consumer_local_data
*ctx
= NULL
;
68 /* list of snapshots currently not consumed */
69 GPtrArray
*available_snapshots
;
70 sem_t metadata_available
;
73 int metadata_ready
= 0;
84 static struct poptOption long_options
[] = {
85 /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
86 { "help", 'h', POPT_ARG_NONE
, NULL
, OPT_HELP
, NULL
, NULL
},
87 { NULL
, 0, 0, NULL
, 0, NULL
, NULL
},
90 void *refresh_thread(void *p
)
98 sleep(refresh_display
/NSEC_PER_SEC
);
102 void *ncurses_display(void *p
)
104 unsigned int current_display_index
= 0;
106 sem_wait(&bootstrap
);
108 * Prevent the 1 second delay when we hit ESC
115 sem_wait(&goodtodisplay
);
116 sem_wait(&pause_sem
);
118 copy
= g_ptr_array_index(copies
, current_display_index
);
120 display(current_display_index
++);
122 sem_post(&goodtoupdate
);
123 sem_post(&pause_sem
);
133 * hook on each event to check the timestamp and refresh the display if
136 enum bt_cb_ret
check_timestamp(struct bt_ctf_event
*call_data
, void *private_data
)
138 unsigned long timestamp
;
140 timestamp
= bt_ctf_get_real_timestamp(call_data
);
141 if (timestamp
== -1ULL)
144 if (last_display_update
== 0)
145 last_display_update
= timestamp
;
147 if (timestamp
- last_display_update
>= refresh_display
) {
148 sem_wait(&goodtoupdate
);
149 g_ptr_array_add(copies
, get_copy_lttngtop(last_display_update
,
151 sem_post(&goodtodisplay
);
152 sem_post(&bootstrap
);
153 last_display_update
= timestamp
;
158 fprintf(stderr
, "check_timestamp callback error\n");
159 return BT_CB_ERROR_STOP
;
163 * get_perf_counter : get or create and return a perf_counter struct for
164 * either a process or a cpu (only one of the 2 parameters mandatory)
166 struct perfcounter
*get_perf_counter(const char *name
, struct processtop
*proc
,
169 struct perfcounter
*ret
;
179 ret
= g_hash_table_lookup(table
, (gpointer
) name
);
183 ret
= g_new0(struct perfcounter
, 1);
184 /* by default, make it visible in the UI */
186 g_hash_table_insert(table
, (gpointer
) strdup(name
), ret
);
195 void update_perf_value(struct processtop
*proc
, struct cputime
*cpu
,
196 const char *name
, int value
)
198 struct perfcounter
*cpu_perf
, *process_perf
;
200 cpu_perf
= get_perf_counter(name
, NULL
, cpu
);
201 if (cpu_perf
->count
< value
) {
202 process_perf
= get_perf_counter(name
, proc
, NULL
);
203 process_perf
->count
+= value
- cpu_perf
->count
;
204 cpu_perf
->count
= value
;
208 void extract_perf_counter_scope(const struct bt_ctf_event
*event
,
209 const struct bt_definition
*scope
,
210 struct processtop
*proc
,
213 struct bt_definition
const * const *list
= NULL
;
214 const struct bt_definition
*field
;
216 struct perfcounter
*perfcounter
;
224 ret
= bt_ctf_get_field_list(event
, scope
, &list
, &count
);
231 g_hash_table_iter_init(&iter
, global_perf_liszt
);
232 while (g_hash_table_iter_next (&iter
, &key
, (gpointer
) &perfcounter
)) {
233 field
= bt_ctf_get_field(event
, scope
, (char *) key
);
235 int value
= bt_ctf_get_uint64(field
);
236 if (bt_ctf_field_get_error())
238 update_perf_value(proc
, cpu
, (char *) key
, value
);
246 void update_perf_counter(struct processtop
*proc
, const struct bt_ctf_event
*event
)
249 const struct bt_definition
*scope
;
251 cpu
= get_cpu(get_cpu_id(event
));
253 scope
= bt_ctf_get_top_level_scope(event
, BT_STREAM_EVENT_CONTEXT
);
254 extract_perf_counter_scope(event
, scope
, proc
, cpu
);
256 scope
= bt_ctf_get_top_level_scope(event
, BT_STREAM_PACKET_CONTEXT
);
257 extract_perf_counter_scope(event
, scope
, proc
, cpu
);
259 scope
= bt_ctf_get_top_level_scope(event
, BT_EVENT_CONTEXT
);
260 extract_perf_counter_scope(event
, scope
, proc
, cpu
);
263 enum bt_cb_ret
fix_process_table(struct bt_ctf_event
*call_data
,
268 struct processtop
*parent
, *child
;
269 unsigned long timestamp
;
271 timestamp
= bt_ctf_get_real_timestamp(call_data
);
272 if (timestamp
== -1ULL)
275 pid
= get_context_pid(call_data
);
279 tid
= get_context_tid(call_data
);
283 ppid
= get_context_ppid(call_data
);
287 comm
= get_context_comm(call_data
);
292 /* find or create the current process */
293 child
= find_process_tid(<tngtop
, tid
, comm
);
295 child
= add_proc(<tngtop
, tid
, comm
, timestamp
);
296 update_proc(child
, pid
, tid
, ppid
, comm
);
299 /* find or create the parent */
300 parent
= find_process_tid(<tngtop
, pid
, comm
);
302 parent
= add_proc(<tngtop
, pid
, comm
, timestamp
);
306 /* attach the parent to the current process */
307 child
->threadparent
= parent
;
308 add_thread(parent
, child
);
311 update_perf_counter(child
, call_data
);
316 return BT_CB_ERROR_STOP
;
321 copies
= g_ptr_array_new();
322 global_perf_liszt
= g_hash_table_new(g_str_hash
, g_str_equal
);
324 sem_init(&goodtodisplay
, 0, 0);
325 sem_init(&goodtoupdate
, 0, 1);
326 sem_init(&timer
, 0, 1);
327 sem_init(&bootstrap
, 0, 0);
328 sem_init(&pause_sem
, 0, 1);
329 sem_init(&end_trace_sem
, 0, 0);
331 reset_global_counters();
333 lttngtop
.nbthreads
= 0;
334 lttngtop
.nbfiles
= 0;
336 lttngtop
.process_table
= g_ptr_array_new();
337 lttngtop
.files_table
= g_ptr_array_new();
338 lttngtop
.cpu_table
= g_ptr_array_new();
343 fprintf(fp
, "LTTngTop %s\n\n", VERSION
);
344 fprintf(fp
, "Usage : lttngtop /path/to/trace\n");
348 * Return 0 if caller should continue, < 0 if caller should return
349 * error, > 0 if caller should exit without reporting error.
351 static int parse_options(int argc
, char **argv
)
356 pc
= poptGetContext(NULL
, argc
, (const char **) argv
, long_options
, 0);
357 poptReadDefaultConfig(pc
, 0);
359 while ((opt
= poptGetNextOpt(pc
)) != -1) {
363 ret
= 1; /* exit cleanly */
371 opt_input_path
= poptGetArg(pc
);
380 void iter_trace(struct bt_context
*bt_ctx
)
382 struct bt_ctf_iter
*iter
;
383 struct bt_iter_pos begin_pos
;
384 const struct bt_ctf_event
*event
;
387 begin_pos
.type
= BT_SEEK_BEGIN
;
388 iter
= bt_ctf_iter_create(bt_ctx
, &begin_pos
, NULL
);
390 /* at each event check if we need to refresh */
391 bt_ctf_iter_add_callback(iter
, 0, NULL
, 0,
394 /* at each event, verify the status of the process table */
395 bt_ctf_iter_add_callback(iter
, 0, NULL
, 0,
398 /* to handle the scheduling events */
399 bt_ctf_iter_add_callback(iter
,
400 g_quark_from_static_string("sched_switch"),
401 NULL
, 0, handle_sched_switch
, NULL
, NULL
, NULL
);
402 /* to clean up the process table */
403 bt_ctf_iter_add_callback(iter
,
404 g_quark_from_static_string("sched_process_free"),
405 NULL
, 0, handle_sched_process_free
, NULL
, NULL
, NULL
);
406 /* to get all the process from the statedumps */
407 bt_ctf_iter_add_callback(iter
,
408 g_quark_from_static_string(
409 "lttng_statedump_process_state"),
410 NULL
, 0, handle_statedump_process_state
,
414 bt_ctf_iter_add_callback(iter
,
415 g_quark_from_static_string("exit_syscall"),
416 NULL
, 0, handle_exit_syscall
, NULL
, NULL
, NULL
);
417 bt_ctf_iter_add_callback(iter
,
418 g_quark_from_static_string("sys_write"),
419 NULL
, 0, handle_sys_write
, NULL
, NULL
, NULL
);
420 bt_ctf_iter_add_callback(iter
,
421 g_quark_from_static_string("sys_read"),
422 NULL
, 0, handle_sys_read
, NULL
, NULL
, NULL
);
423 bt_ctf_iter_add_callback(iter
,
424 g_quark_from_static_string("sys_open"),
425 NULL
, 0, handle_sys_open
, NULL
, NULL
, NULL
);
426 bt_ctf_iter_add_callback(iter
,
427 g_quark_from_static_string("sys_close"),
428 NULL
, 0, handle_sys_close
, NULL
, NULL
, NULL
);
429 bt_ctf_iter_add_callback(iter
,
430 g_quark_from_static_string(
431 "lttng_statedump_file_descriptor"),
432 NULL
, 0, handle_statedump_file_descriptor
,
435 while ((event
= bt_ctf_iter_read_event(iter
)) != NULL
) {
436 ret
= bt_iter_next(bt_ctf_get_iter(iter
));
441 /* block until quit, we reached the end of the trace */
442 sem_wait(&end_trace_sem
);
445 bt_ctf_iter_destroy(iter
);
449 * bt_context_add_traces_recursive: Open a trace recursively
450 * (copied from BSD code in converter/babeltrace.c)
452 * Find each trace present in the subdirectory starting from the given
453 * path, and add them to the context. The packet_seek parameter can be
454 * NULL: this specify to use the default format packet_seek.
456 * Return: 0 on success, nonzero on failure.
457 * Unable to open toplevel: failure.
458 * Unable to open some subdirectory or file: warn and continue;
460 int bt_context_add_traces_recursive(struct bt_context
*ctx
, const char *path
,
461 const char *format_str
,
462 void (*packet_seek
)(struct bt_stream_pos
*pos
,
463 size_t offset
, int whence
))
468 char lpath
[PATH_MAX
];
469 char * const paths
[2] = { lpath
, NULL
};
473 * Need to copy path, because fts_open can change it.
474 * It is the pointer array, not the strings, that are constant.
476 strncpy(lpath
, path
, PATH_MAX
);
477 lpath
[PATH_MAX
- 1] = '\0';
479 tree
= fts_open(paths
, FTS_NOCHDIR
| FTS_LOGICAL
, 0);
481 fprintf(stderr
, "[error] [Context] Cannot traverse \"%s\" for reading.\n",
486 trace_ids
= g_array_new(FALSE
, TRUE
, sizeof(int));
488 while ((node
= fts_read(tree
))) {
491 if (!(node
->fts_info
& FTS_D
))
494 dirfd
= open(node
->fts_accpath
, 0);
496 fprintf(stderr
, "[error] [Context] Unable to open trace "
497 "directory file descriptor.\n");
501 metafd
= openat(dirfd
, "metadata", O_RDONLY
);
520 trace_id
= bt_context_add_trace(ctx
,
521 node
->fts_accpath
, format_str
,
522 packet_seek
, NULL
, NULL
);
524 fprintf(stderr
, "[warning] [Context] opening trace \"%s\" from %s "
525 "for reading.\n", node
->fts_accpath
, path
);
526 /* Allow to skip erroneous traces. */
529 g_array_append_val(trace_ids
, trace_id
);
533 g_array_free(trace_ids
, TRUE
);
540 static int check_field_requirements(const struct bt_ctf_field_decl
*const * field_list
,
541 int field_cnt
, int *tid_check
, int *pid_check
,
542 int *procname_check
, int *ppid_check
)
545 struct perfcounter
*global
;
548 for (j
= 0; j
< field_cnt
; j
++) {
549 name
= bt_ctf_get_decl_field_name(field_list
[j
]);
550 if (*tid_check
== 0) {
551 if (strncmp(name
, "tid", 3) == 0)
554 if (*pid_check
== 0) {
555 if (strncmp(name
, "pid", 3) == 0)
558 if (*ppid_check
== 0) {
559 if (strncmp(name
, "ppid", 4) == 0)
562 if (*procname_check
== 0) {
563 if (strncmp(name
, "procname", 8) == 0)
566 if (strncmp(name
, "perf_", 5) == 0) {
567 global
= g_hash_table_lookup(global_perf_liszt
, (gpointer
) name
);
569 global
= g_new0(struct perfcounter
, 1);
570 /* by default, sort on the first perf context */
571 if (g_hash_table_size(global_perf_liszt
) == 0)
574 g_hash_table_insert(global_perf_liszt
, (gpointer
) strdup(name
), global
);
579 if (*tid_check
== 1 && *pid_check
== 1 && *ppid_check
== 1 &&
580 *procname_check
== 1)
587 * check_requirements: check if the required context informations are available
589 * If each mandatory context information is available for at least in one
590 * event, return 0 otherwise return -1.
592 int check_requirements(struct bt_context
*ctx
)
594 unsigned int i
, evt_cnt
, field_cnt
;
595 struct bt_ctf_event_decl
*const * evt_list
;
596 const struct bt_ctf_field_decl
*const * field_list
;
599 int procname_check
= 0;
603 bt_ctf_get_event_decl_list(0, ctx
, &evt_list
, &evt_cnt
);
604 for (i
= 0; i
< evt_cnt
; i
++) {
605 bt_ctf_get_decl_fields(evt_list
[i
], BT_STREAM_EVENT_CONTEXT
,
606 &field_list
, &field_cnt
);
607 ret
= check_field_requirements(field_list
, field_cnt
,
608 &tid_check
, &pid_check
, &procname_check
,
611 bt_ctf_get_decl_fields(evt_list
[i
], BT_EVENT_CONTEXT
,
612 &field_list
, &field_cnt
);
613 ret
= check_field_requirements(field_list
, field_cnt
,
614 &tid_check
, &pid_check
, &procname_check
,
617 bt_ctf_get_decl_fields(evt_list
[i
], BT_STREAM_PACKET_CONTEXT
,
618 &field_list
, &field_cnt
);
619 ret
= check_field_requirements(field_list
, field_cnt
,
620 &tid_check
, &pid_check
, &procname_check
,
624 if (tid_check
== 0) {
626 fprintf(stderr
, "[error] missing tid context information\n");
628 if (pid_check
== 0) {
630 fprintf(stderr
, "[error] missing pid context information\n");
632 if (ppid_check
== 0) {
634 fprintf(stderr
, "[error] missing ppid context information\n");
636 if (procname_check
== 0) {
638 fprintf(stderr
, "[error] missing procname context information\n");
646 struct lttng_consumer_stream
*iter
;
648 struct mmap_stream
*new_snapshot
;
653 * try lock mutex ressource courante (overrun)
655 * stop trace (flush implicite avant stop)
656 * lttng_consumer_take_snapshot
657 * read timestamp packet end (use time as end pos)
658 * - stream_packet_context
659 * - reculer de 1 subbuf : pos - max_subbuff_size
661 * - position de fin (take_snapshot)
662 * - mov_pos_slow ( fin - max_subbuff_size) lire timestamp packet end
663 * - prend min(end) (activité sur tous les streams)
669 helper_kernctl_buffer_flush(consumerd_metadata
);
670 for (i
= 0; i
< lttng_consumer_stream_array
->len
; i
++) {
671 iter
= g_ptr_array_index(lttng_consumer_stream_array
, i
);
672 helper_kernctl_buffer_flush(helper_get_lttng_consumer_stream_wait_fd(iter
));
673 ret
= helper_lttng_consumer_take_snapshot(ctx
, iter
);
676 perror("lttng_consumer_take_snapshots");
680 for (i
= 0; i
< lttng_consumer_stream_array
->len
; i
++) {
681 iter
= g_ptr_array_index(lttng_consumer_stream_array
, i
);
682 //cds_list_for_each_entry(iter2, &mmap_stream_list.head, list) {
684 ret
= helper_lttng_consumer_get_produced_snapshot(ctx
, iter
, &spos
);
687 perror("helper_lttng_consumer_get_produced_snapshot");
690 //while (iter->last_pos < spos) { FIXME : last_pos does not exists
691 new_snapshot
= g_new0(struct mmap_stream
, 1);
692 new_snapshot
->fd
= helper_get_lttng_consumer_stream_wait_fd(iter
);
693 //FIXME new_snapshot->last_pos = iter->last_pos; /* not last_pos, pos for the snapshot */
694 // fprintf(stderr,"ADDING AVAILABLE SNAPSHOT ON FD %d AT POSITION %lu\n",
695 // new_snapshot->kconsumerd_fd->wait_fd,
696 // new_snapshot->last_pos);
697 g_ptr_array_add(available_snapshots
, new_snapshot
);
698 //FIXME iter->last_pos += iter->chan->max_sb_size;
702 if (!metadata_ready
) {
703 // fprintf(stderr, "BLOCKING BEFORE METADATA\n");
704 sem_wait(&metadata_available
);
705 // fprintf(stderr,"OPENING TRACE\n");
706 if (access("/tmp/livesession/kernel/metadata", F_OK
) != 0) {
707 fprintf(stderr
,"NO METADATA FILE, SKIPPING\n");
711 metadata_fp
= fopen("/tmp/livesession/kernel/metadata", "r");
715 //bt_ctx = bt_context_create();
716 // ret = bt_context_add_trace(ctx, NULL, "ctf", ctf_move_mmap_pos_slow, mmap_list, metadata_fp);
719 //iter_trace(bt_ctx);
725 ssize_t
read_subbuffer(struct lttng_consumer_stream
*kconsumerd_fd
,
726 struct lttng_consumer_local_data
*ctx
)
731 int infd
= helper_get_lttng_consumer_stream_wait_fd(kconsumerd_fd
);
733 if (helper_get_lttng_consumer_stream_output(kconsumerd_fd
) == LTTNG_EVENT_SPLICE
) {
734 /* Get the next subbuffer */
735 printf("get_next : %d\n", infd
);
736 err
= helper_kernctl_get_next_subbuf(infd
);
739 perror("Reserving sub buffer failed (everything is normal, "
740 "it is due to concurrency)");
743 /* read the whole subbuffer */
744 err
= helper_kernctl_get_padded_subbuf_size(infd
, &len
);
747 perror("Getting sub-buffer len failed.");
750 printf("len : %ld\n", len
);
752 /* splice the subbuffer to the tracefile */
753 ret
= helper_lttng_consumer_on_read_subbuffer_splice(ctx
, kconsumerd_fd
, len
);
756 * display the error but continue processing to try
757 * to release the subbuffer
759 fprintf(stderr
,"Error splicing to tracefile\n");
761 printf("ret : %ld\n", ret
);
762 printf("put_next : %d\n", infd
);
763 err
= helper_kernctl_put_next_subbuf(infd
);
766 perror("Reserving sub buffer failed (everything is normal, "
767 "it is due to concurrency)");
770 sem_post(&metadata_available
);
777 int on_update_fd(int key
, uint32_t state
)
779 /* let the lib handle the metadata FD */
780 if (key
== sessiond_metadata
)
785 int on_recv_fd(struct lttng_consumer_stream
*kconsumerd_fd
)
788 struct mmap_stream
*new_info
;
791 /* Opening the tracefile in write mode */
792 if (helper_get_lttng_consumer_stream_path_name(kconsumerd_fd
) != NULL
) {
793 ret
= open(helper_get_lttng_consumer_stream_path_name(kconsumerd_fd
),
794 O_WRONLY
|O_CREAT
|O_TRUNC
, S_IRWXU
|S_IRWXG
|S_IRWXO
);
799 helper_set_lttng_consumer_stream_out_fd(kconsumerd_fd
, ret
);
802 if (helper_get_lttng_consumer_stream_output(kconsumerd_fd
) == LTTNG_EVENT_MMAP
) {
803 new_info
= malloc(sizeof(struct mmap_stream
));
804 new_info
->fd
= helper_get_lttng_consumer_stream_wait_fd(kconsumerd_fd
);
805 bt_list_add(&new_info
->list
, &mmap_list
.head
);
807 /* get the len of the mmap region */
808 ret
= helper_kernctl_get_mmap_len(helper_get_lttng_consumer_stream_wait_fd(kconsumerd_fd
),
812 perror("helper_kernctl_get_mmap_len");
815 helper_set_lttng_consumer_stream_mmap_len(kconsumerd_fd
, tmp_mmap_len
);
817 helper_set_lttng_consumer_stream_mmap_base(kconsumerd_fd
,
818 mmap(NULL
, helper_get_lttng_consumer_stream_mmap_len(kconsumerd_fd
),
819 PROT_READ
, MAP_PRIVATE
, helper_get_lttng_consumer_stream_wait_fd(kconsumerd_fd
), 0));
820 if (helper_get_lttng_consumer_stream_mmap_base(kconsumerd_fd
) == MAP_FAILED
) {
821 perror("Error mmaping");
826 g_ptr_array_add(lttng_consumer_stream_array
, kconsumerd_fd
);
829 consumerd_metadata
= helper_get_lttng_consumer_stream_wait_fd(kconsumerd_fd
);
830 sessiond_metadata
= helper_get_lttng_consumer_stream_key(kconsumerd_fd
);
839 int setup_consumer(char *command_sock_path
, pthread_t
*threads
,
840 struct lttng_consumer_local_data
*ctx
)
844 ctx
= helper_lttng_consumer_create(HELPER_LTTNG_CONSUMER_KERNEL
,
845 read_subbuffer
, NULL
, on_recv_fd
, on_update_fd
);
849 unlink(command_sock_path
);
850 helper_lttng_consumer_set_command_sock_path(ctx
, command_sock_path
);
851 helper_lttng_consumer_init();
853 /* Create the thread to manage the receive of fd */
854 ret
= pthread_create(&threads
[0], NULL
, helper_lttng_consumer_thread_receive_fds
,
857 perror("pthread_create");
860 /* Create thread to manage the polling/writing of traces */
861 ret
= pthread_create(&threads
[1], NULL
, helper_lttng_consumer_thread_poll_fds
,
864 perror("pthread_create");
872 int setup_live_tracing()
874 struct lttng_domain dom
;
875 struct lttng_channel chan
;
876 char *channel_name
= "mmapchan";
877 struct lttng_event ev
;
879 char *command_sock_path
= "/tmp/consumerd_sock";
880 static pthread_t threads
[2]; /* recv_fd, poll */
881 struct lttng_event_context kctxpid
, kctxcomm
, kctxppid
, kctxtid
;
883 struct lttng_handle
*handle
;
885 BT_INIT_LIST_HEAD(&mmap_list
.head
);
887 lttng_consumer_stream_array
= g_ptr_array_new();
889 if ((ret
= setup_consumer(command_sock_path
, threads
, ctx
)) < 0) {
890 fprintf(stderr
,"error setting up consumer\n");
894 available_snapshots
= g_ptr_array_new();
896 /* setup the session */
897 dom
.type
= LTTNG_DOMAIN_KERNEL
;
899 ret
= system("rm -rf /tmp/livesession");
901 if ((ret
= lttng_create_session("test", "/tmp/livesession")) < 0) {
902 fprintf(stderr
,"error creating the session : %s\n",
903 helper_lttcomm_get_readable_code(ret
));
907 if ((handle
= lttng_create_handle("test", &dom
)) == NULL
) {
908 fprintf(stderr
,"error creating handle\n");
912 if ((ret
= lttng_register_consumer(handle
, command_sock_path
)) < 0) {
913 fprintf(stderr
,"error registering consumer : %s\n",
914 helper_lttcomm_get_readable_code(ret
));
918 strcpy(chan
.name
, channel_name
);
919 chan
.attr
.overwrite
= 1;
920 // chan.attr.subbuf_size = 32768;
921 chan
.attr
.subbuf_size
= 1048576; /* 1MB */
922 chan
.attr
.num_subbuf
= 4;
923 chan
.attr
.switch_timer_interval
= 0;
924 chan
.attr
.read_timer_interval
= 200;
925 chan
.attr
.output
= LTTNG_EVENT_MMAP
;
927 if ((ret
= lttng_enable_channel(handle
, &chan
)) < 0) {
928 fprintf(stderr
,"error creating channel : %s\n", helper_lttcomm_get_readable_code(ret
));
932 sprintf(ev
.name
, "sched_switch");
933 ev
.type
= LTTNG_EVENT_TRACEPOINT
;
935 //if ((ret = lttng_enable_event(handle, NULL, channel_name)) < 0) {
936 if ((ret
= lttng_enable_event(handle
, &ev
, channel_name
)) < 0) {
937 fprintf(stderr
,"error enabling event : %s\n", helper_lttcomm_get_readable_code(ret
));
941 kctxpid
.ctx
= LTTNG_EVENT_CONTEXT_PID
;
942 lttng_add_context(handle
, &kctxpid
, NULL
, NULL
);
943 kctxppid
.ctx
= LTTNG_EVENT_CONTEXT_PPID
;
944 lttng_add_context(handle
, &kctxppid
, NULL
, NULL
);
945 kctxcomm
.ctx
= LTTNG_EVENT_CONTEXT_PROCNAME
;
946 lttng_add_context(handle
, &kctxcomm
, NULL
, NULL
);
947 kctxtid
.ctx
= LTTNG_EVENT_CONTEXT_TID
;
948 lttng_add_context(handle
, &kctxtid
, NULL
, NULL
);
950 if ((ret
= lttng_start_tracing("test")) < 0) {
951 fprintf(stderr
,"error starting tracing : %s\n", helper_lttcomm_get_readable_code(ret
));
955 helper_kernctl_buffer_flush(consumerd_metadata
);
958 lttng_stop_tracing("test");
959 lttng_destroy_session("test");
961 /* block until metadata is ready */
962 sem_init(&metadata_available
, 0, 0);
970 int main(int argc
, char **argv
)
973 struct bt_context
*bt_ctx
= NULL
;
975 ret
= parse_options(argc
, argv
);
977 fprintf(stdout
, "Error parsing options.\n\n");
980 } else if (ret
> 0) {
984 if (!opt_input_path
) {
985 printf("live tracing enabled\n");
986 setup_live_tracing();
991 bt_ctx
= bt_context_create();
992 ret
= bt_context_add_traces_recursive(bt_ctx
, opt_input_path
, "ctf", NULL
);
994 fprintf(stderr
, "[error] Opening the trace\n");
998 ret
= check_requirements(bt_ctx
);
1000 fprintf(stderr
, "[error] some mandatory contexts were missing, exiting.\n");
1003 pthread_create(&display_thread
, NULL
, ncurses_display
, (void *) NULL
);
1004 pthread_create(&timer_thread
, NULL
, refresh_thread
, (void *) NULL
);
1009 pthread_join(display_thread
, NULL
);
1010 pthread_join(timer_thread
, NULL
);
1015 bt_context_put(bt_ctx
);