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>
43 #include <babeltrace/lttngtopmmappacketseek.h>
45 #include "lttngtoptypes.h"
47 #include "iostreamtop.h"
48 #include "cursesdisplay.h"
51 #define DEFAULT_FILE_ARRAY_SIZE 1
53 const char *opt_input_path
;
58 struct lttngtop
*copy
;
59 pthread_t display_thread
;
60 pthread_t timer_thread
;
62 unsigned long refresh_display
= 1 * NSEC_PER_SEC
;
63 unsigned long last_display_update
= 0;
65 /* list of FDs available for being read with snapshots */
66 struct mmap_stream_list mmap_list
;
67 GPtrArray
*lttng_consumer_stream_array
;
68 int sessiond_metadata
, consumerd_metadata
;
69 struct lttng_consumer_local_data
*ctx
= NULL
;
70 /* list of snapshots currently not consumed */
71 GPtrArray
*available_snapshots
;
72 sem_t metadata_available
;
81 static struct poptOption long_options
[] = {
82 /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
83 { "help", 'h', POPT_ARG_NONE
, NULL
, OPT_HELP
, NULL
, NULL
},
84 { "textdump", 't', POPT_ARG_NONE
, NULL
, OPT_TEXTDUMP
, NULL
, NULL
},
85 { NULL
, 0, 0, NULL
, 0, NULL
, NULL
},
88 void *refresh_thread(void *p
)
90 struct mmap_stream
*mmap_info
;
96 sem_post(&goodtodisplay
);
99 bt_list_for_each_entry(mmap_info
, &mmap_list
.head
, list
)
100 helper_kernctl_buffer_flush(mmap_info
->fd
);
101 sem_wait(&pause_sem
);
102 sem_post(&pause_sem
);
104 sleep(refresh_display
/NSEC_PER_SEC
);
108 void *ncurses_display(void *p
)
110 unsigned int current_display_index
= 0;
112 sem_wait(&bootstrap
);
114 * Prevent the 1 second delay when we hit ESC
121 sem_wait(&goodtodisplay
);
122 sem_wait(&pause_sem
);
125 sem_post(&pause_sem
);
131 copy
= g_ptr_array_index(copies
, current_display_index
);
133 display(current_display_index
++);
135 sem_post(&goodtoupdate
);
136 sem_post(&pause_sem
);
141 * hook on each event to check the timestamp and refresh the display if
144 enum bt_cb_ret
print_timestamp(struct bt_ctf_event
*call_data
, void *private_data
)
146 unsigned long timestamp
;
148 uint64_t ts_nsec_start
;
150 timestamp
= bt_ctf_get_timestamp(call_data
);
152 start
= format_timestamp(timestamp
);
153 ts_nsec_start
= timestamp
% NSEC_PER_SEC
;
155 printf("%02d:%02d:%02d.%09" PRIu64
" %s\n", start
.tm_hour
,
156 start
.tm_min
, start
.tm_sec
, ts_nsec_start
,
157 bt_ctf_event_name(call_data
));
163 * hook on each event to check the timestamp and refresh the display if
166 enum bt_cb_ret
check_timestamp(struct bt_ctf_event
*call_data
, void *private_data
)
168 unsigned long timestamp
;
170 timestamp
= bt_ctf_get_timestamp(call_data
);
171 if (timestamp
== -1ULL)
174 if (last_display_update
== 0)
175 last_display_update
= timestamp
;
177 if (timestamp
- last_display_update
>= refresh_display
) {
178 sem_wait(&goodtoupdate
);
179 g_ptr_array_add(copies
, get_copy_lttngtop(last_display_update
,
181 sem_post(&goodtodisplay
);
182 sem_post(&bootstrap
);
183 last_display_update
= timestamp
;
188 fprintf(stderr
, "check_timestamp callback error\n");
189 return BT_CB_ERROR_STOP
;
193 * get_perf_counter : get or create and return a perf_counter struct for
194 * either a process or a cpu (only one of the 2 parameters mandatory)
196 struct perfcounter
*get_perf_counter(const char *name
, struct processtop
*proc
,
199 struct perfcounter
*ret
;
209 ret
= g_hash_table_lookup(table
, (gpointer
) name
);
213 ret
= g_new0(struct perfcounter
, 1);
214 /* by default, make it visible in the UI */
216 g_hash_table_insert(table
, (gpointer
) strdup(name
), ret
);
225 void update_perf_value(struct processtop
*proc
, struct cputime
*cpu
,
226 const char *name
, int value
)
228 struct perfcounter
*cpu_perf
, *process_perf
;
230 cpu_perf
= get_perf_counter(name
, NULL
, cpu
);
231 if (cpu_perf
->count
< value
) {
232 process_perf
= get_perf_counter(name
, proc
, NULL
);
233 process_perf
->count
+= value
- cpu_perf
->count
;
234 cpu_perf
->count
= value
;
238 void extract_perf_counter_scope(const struct bt_ctf_event
*event
,
239 const struct definition
*scope
,
240 struct processtop
*proc
,
243 struct definition
const * const *list
= NULL
;
244 const struct definition
*field
;
246 struct perfcounter
*perfcounter
;
254 ret
= bt_ctf_get_field_list(event
, scope
, &list
, &count
);
261 g_hash_table_iter_init(&iter
, global_perf_liszt
);
262 while (g_hash_table_iter_next (&iter
, &key
, (gpointer
) &perfcounter
)) {
263 field
= bt_ctf_get_field(event
, scope
, (char *) key
);
265 int value
= bt_ctf_get_uint64(field
);
266 if (bt_ctf_field_get_error())
268 update_perf_value(proc
, cpu
, (char *) key
, value
);
276 void update_perf_counter(struct processtop
*proc
, const struct bt_ctf_event
*event
)
279 const struct definition
*scope
;
281 cpu
= get_cpu(get_cpu_id(event
));
283 scope
= bt_ctf_get_top_level_scope(event
, BT_STREAM_EVENT_CONTEXT
);
284 extract_perf_counter_scope(event
, scope
, proc
, cpu
);
286 scope
= bt_ctf_get_top_level_scope(event
, BT_STREAM_PACKET_CONTEXT
);
287 extract_perf_counter_scope(event
, scope
, proc
, cpu
);
289 scope
= bt_ctf_get_top_level_scope(event
, BT_EVENT_CONTEXT
);
290 extract_perf_counter_scope(event
, scope
, proc
, cpu
);
293 enum bt_cb_ret
fix_process_table(struct bt_ctf_event
*call_data
,
298 struct processtop
*parent
, *child
;
299 unsigned long timestamp
;
301 timestamp
= bt_ctf_get_timestamp(call_data
);
302 if (timestamp
== -1ULL)
305 pid
= get_context_pid(call_data
);
309 tid
= get_context_tid(call_data
);
313 ppid
= get_context_ppid(call_data
);
317 comm
= get_context_comm(call_data
);
322 /* find or create the current process */
323 child
= find_process_tid(<tngtop
, tid
, comm
);
325 child
= add_proc(<tngtop
, tid
, comm
, timestamp
);
326 update_proc(child
, pid
, tid
, ppid
, comm
);
329 /* find or create the parent */
330 parent
= find_process_tid(<tngtop
, pid
, comm
);
332 parent
= add_proc(<tngtop
, pid
, comm
, timestamp
);
336 /* attach the parent to the current process */
337 child
->threadparent
= parent
;
338 add_thread(parent
, child
);
341 update_perf_counter(child
, call_data
);
346 return BT_CB_ERROR_STOP
;
351 copies
= g_ptr_array_new();
352 global_perf_liszt
= g_hash_table_new(g_str_hash
, g_str_equal
);
354 sem_init(&goodtodisplay
, 0, 0);
355 sem_init(&goodtoupdate
, 0, 1);
356 sem_init(&timer
, 0, 1);
357 sem_init(&bootstrap
, 0, 0);
358 sem_init(&pause_sem
, 0, 1);
359 sem_init(&end_trace_sem
, 0, 0);
361 reset_global_counters();
363 lttngtop
.nbthreads
= 0;
364 lttngtop
.nbfiles
= 0;
366 lttngtop
.process_hash_table
= g_hash_table_new(g_direct_hash
,
368 lttngtop
.process_table
= g_ptr_array_new();
369 lttngtop
.files_table
= g_ptr_array_new();
370 lttngtop
.cpu_table
= g_ptr_array_new();
375 fprintf(fp
, "LTTngTop %s\n\n", VERSION
);
376 fprintf(fp
, "Usage : lttngtop /path/to/trace\n");
380 * Return 0 if caller should continue, < 0 if caller should return
381 * error, > 0 if caller should exit without reporting error.
383 static int parse_options(int argc
, char **argv
)
388 pc
= poptGetContext(NULL
, argc
, (const char **) argv
, long_options
, 0);
389 poptReadDefaultConfig(pc
, 0);
391 while ((opt
= poptGetNextOpt(pc
)) != -1) {
395 ret
= 1; /* exit cleanly */
406 opt_input_path
= poptGetArg(pc
);
415 void iter_trace(struct bt_context
*bt_ctx
)
417 struct bt_ctf_iter
*iter
;
418 struct bt_iter_pos begin_pos
;
419 const struct bt_ctf_event
*event
;
422 begin_pos
.type
= BT_SEEK_BEGIN
;
423 iter
= bt_ctf_iter_create(bt_ctx
, &begin_pos
, NULL
);
426 bt_ctf_iter_add_callback(iter
, 0, NULL
, 0,
430 /* at each event check if we need to refresh */
431 bt_ctf_iter_add_callback(iter
, 0, NULL
, 0,
434 /* at each event, verify the status of the process table */
435 bt_ctf_iter_add_callback(iter
, 0, NULL
, 0,
438 /* to handle the scheduling events */
439 bt_ctf_iter_add_callback(iter
,
440 g_quark_from_static_string("sched_switch"),
441 NULL
, 0, handle_sched_switch
, NULL
, NULL
, NULL
);
442 /* to clean up the process table */
443 bt_ctf_iter_add_callback(iter
,
444 g_quark_from_static_string("sched_process_free"),
445 NULL
, 0, handle_sched_process_free
, NULL
, NULL
, NULL
);
446 /* to get all the process from the statedumps */
447 bt_ctf_iter_add_callback(iter
,
448 g_quark_from_static_string(
449 "lttng_statedump_process_state"),
450 NULL
, 0, handle_statedump_process_state
,
454 bt_ctf_iter_add_callback(iter
,
455 g_quark_from_static_string("exit_syscall"),
456 NULL
, 0, handle_exit_syscall
, NULL
, NULL
, NULL
);
457 bt_ctf_iter_add_callback(iter
,
458 g_quark_from_static_string("sys_write"),
459 NULL
, 0, handle_sys_write
, NULL
, NULL
, NULL
);
460 bt_ctf_iter_add_callback(iter
,
461 g_quark_from_static_string("sys_read"),
462 NULL
, 0, handle_sys_read
, NULL
, NULL
, NULL
);
463 bt_ctf_iter_add_callback(iter
,
464 g_quark_from_static_string("sys_open"),
465 NULL
, 0, handle_sys_open
, NULL
, NULL
, NULL
);
466 bt_ctf_iter_add_callback(iter
,
467 g_quark_from_static_string("sys_close"),
468 NULL
, 0, handle_sys_close
, NULL
, NULL
, NULL
);
469 bt_ctf_iter_add_callback(iter
,
470 g_quark_from_static_string(
471 "lttng_statedump_file_descriptor"),
472 NULL
, 0, handle_statedump_file_descriptor
,
476 while ((event
= bt_ctf_iter_read_event(iter
)) != NULL
) {
477 if (quit
|| reload_trace
)
479 ret
= bt_iter_next(bt_ctf_get_iter(iter
));
484 /* block until quit, we reached the end of the trace */
485 sem_wait(&end_trace_sem
);
488 bt_ctf_iter_destroy(iter
);
492 * bt_context_add_traces_recursive: Open a trace recursively
493 * (copied from BSD code in converter/babeltrace.c)
495 * Find each trace present in the subdirectory starting from the given
496 * path, and add them to the context. The packet_seek parameter can be
497 * NULL: this specify to use the default format packet_seek.
499 * Return: 0 on success, nonzero on failure.
500 * Unable to open toplevel: failure.
501 * Unable to open some subdirectory or file: warn and continue;
503 int bt_context_add_traces_recursive(struct bt_context
*ctx
, const char *path
,
504 const char *format_str
,
505 void (*packet_seek
)(struct stream_pos
*pos
,
506 size_t offset
, int whence
))
511 char lpath
[PATH_MAX
];
512 char * const paths
[2] = { lpath
, NULL
};
516 * Need to copy path, because fts_open can change it.
517 * It is the pointer array, not the strings, that are constant.
519 strncpy(lpath
, path
, PATH_MAX
);
520 lpath
[PATH_MAX
- 1] = '\0';
522 tree
= fts_open(paths
, FTS_NOCHDIR
| FTS_LOGICAL
, 0);
524 fprintf(stderr
, "[error] [Context] Cannot traverse \"%s\" for reading.\n",
529 trace_ids
= g_array_new(FALSE
, TRUE
, sizeof(int));
531 while ((node
= fts_read(tree
))) {
534 if (!(node
->fts_info
& FTS_D
))
537 dirfd
= open(node
->fts_accpath
, 0);
539 fprintf(stderr
, "[error] [Context] Unable to open trace "
540 "directory file descriptor.\n");
544 metafd
= openat(dirfd
, "metadata", O_RDONLY
);
563 trace_id
= bt_context_add_trace(ctx
,
564 node
->fts_accpath
, format_str
,
565 packet_seek
, NULL
, NULL
);
567 fprintf(stderr
, "[warning] [Context] opening trace \"%s\" from %s "
568 "for reading.\n", node
->fts_accpath
, path
);
569 /* Allow to skip erroneous traces. */
572 g_array_append_val(trace_ids
, trace_id
);
576 g_array_free(trace_ids
, TRUE
);
583 static int check_field_requirements(const struct bt_ctf_field_decl
*const * field_list
,
584 int field_cnt
, int *tid_check
, int *pid_check
,
585 int *procname_check
, int *ppid_check
)
588 struct perfcounter
*global
;
591 for (j
= 0; j
< field_cnt
; j
++) {
592 name
= bt_ctf_get_decl_field_name(field_list
[j
]);
593 if (*tid_check
== 0) {
594 if (strncmp(name
, "tid", 3) == 0)
597 if (*pid_check
== 0) {
598 if (strncmp(name
, "tid", 3) == 0)
601 if (*ppid_check
== 0) {
602 if (strncmp(name
, "ppid", 4) == 0)
605 if (*procname_check
== 0) {
606 if (strncmp(name
, "procname", 8) == 0)
609 if (strncmp(name
, "perf_", 5) == 0) {
610 global
= g_hash_table_lookup(global_perf_liszt
, (gpointer
) name
);
612 global
= g_new0(struct perfcounter
, 1);
613 /* by default, sort on the first perf context */
614 if (g_hash_table_size(global_perf_liszt
) == 0)
617 g_hash_table_insert(global_perf_liszt
, (gpointer
) strdup(name
), global
);
622 if (*tid_check
== 1 && *pid_check
== 1 && *ppid_check
== 1 &&
623 *procname_check
== 1)
630 * check_requirements: check if the required context informations are available
632 * If each mandatory context information is available for at least in one
633 * event, return 0 otherwise return -1.
635 int check_requirements(struct bt_context
*ctx
)
637 unsigned int i
, evt_cnt
, field_cnt
;
638 struct bt_ctf_event_decl
*const * evt_list
;
639 const struct bt_ctf_field_decl
*const * field_list
;
642 int procname_check
= 0;
646 bt_ctf_get_event_decl_list(0, ctx
, &evt_list
, &evt_cnt
);
647 for (i
= 0; i
< evt_cnt
; i
++) {
648 bt_ctf_get_decl_fields(evt_list
[i
], BT_STREAM_EVENT_CONTEXT
,
649 &field_list
, &field_cnt
);
650 ret
= check_field_requirements(field_list
, field_cnt
,
651 &tid_check
, &pid_check
, &procname_check
,
654 bt_ctf_get_decl_fields(evt_list
[i
], BT_EVENT_CONTEXT
,
655 &field_list
, &field_cnt
);
656 ret
= check_field_requirements(field_list
, field_cnt
,
657 &tid_check
, &pid_check
, &procname_check
,
660 bt_ctf_get_decl_fields(evt_list
[i
], BT_STREAM_PACKET_CONTEXT
,
661 &field_list
, &field_cnt
);
662 ret
= check_field_requirements(field_list
, field_cnt
,
663 &tid_check
, &pid_check
, &procname_check
,
667 if (tid_check
== 0) {
669 fprintf(stderr
, "[error] missing tid context information\n");
671 if (pid_check
== 0) {
673 fprintf(stderr
, "[error] missing pid context information\n");
675 if (ppid_check
== 0) {
677 fprintf(stderr
, "[error] missing ppid context information\n");
679 if (procname_check
== 0) {
681 fprintf(stderr
, "[error] missing procname context information\n");
687 ssize_t
read_subbuffer(struct lttng_consumer_stream
*kconsumerd_fd
,
688 struct lttng_consumer_local_data
*ctx
)
693 int infd
= helper_get_lttng_consumer_stream_wait_fd(kconsumerd_fd
);
695 if (helper_get_lttng_consumer_stream_output(kconsumerd_fd
) == LTTNG_EVENT_SPLICE
) {
696 /* Get the next subbuffer */
697 err
= helper_kernctl_get_next_subbuf(infd
);
700 perror("Reserving sub buffer failed (everything is normal, "
701 "it is due to concurrency)");
704 /* read the whole subbuffer */
705 err
= helper_kernctl_get_padded_subbuf_size(infd
, &len
);
708 perror("Getting sub-buffer len failed.");
712 /* splice the subbuffer to the tracefile */
713 ret
= helper_lttng_consumer_on_read_subbuffer_splice(ctx
, kconsumerd_fd
, len
);
716 * display the error but continue processing to try
717 * to release the subbuffer
719 fprintf(stderr
,"Error splicing to tracefile\n");
721 err
= helper_kernctl_put_next_subbuf(infd
);
724 perror("Reserving sub buffer failed (everything is normal, "
725 "it is due to concurrency)");
728 sem_post(&metadata_available
);
735 int on_update_fd(int key
, uint32_t state
)
737 /* let the lib handle the metadata FD */
738 if (key
== sessiond_metadata
)
743 int on_recv_fd(struct lttng_consumer_stream
*kconsumerd_fd
)
746 struct mmap_stream
*new_mmap_stream
;
748 /* Opening the tracefile in write mode */
749 if (helper_get_lttng_consumer_stream_path_name(kconsumerd_fd
) != NULL
) {
750 ret
= open(helper_get_lttng_consumer_stream_path_name(kconsumerd_fd
),
751 O_WRONLY
|O_CREAT
|O_TRUNC
, S_IRWXU
|S_IRWXG
|S_IRWXO
);
756 helper_set_lttng_consumer_stream_out_fd(kconsumerd_fd
, ret
);
759 if (helper_get_lttng_consumer_stream_output(kconsumerd_fd
) == LTTNG_EVENT_MMAP
) {
760 new_mmap_stream
= malloc(sizeof(struct mmap_stream
));
761 new_mmap_stream
->fd
= helper_get_lttng_consumer_stream_wait_fd(
763 bt_list_add(&new_mmap_stream
->list
, &mmap_list
.head
);
765 g_ptr_array_add(lttng_consumer_stream_array
, kconsumerd_fd
);
766 /* keep mmap FDs internally */
769 consumerd_metadata
= helper_get_lttng_consumer_stream_wait_fd(kconsumerd_fd
);
770 sessiond_metadata
= helper_get_lttng_consumer_stream_key(kconsumerd_fd
);
780 void live_consume(struct bt_context
**bt_ctx
)
785 sem_wait(&metadata_available
);
786 if (access("/tmp/livesession/kernel/metadata", F_OK
) != 0) {
787 fprintf(stderr
,"no metadata\n");
790 metadata_fp
= fopen("/tmp/livesession/kernel/metadata", "r");
792 *bt_ctx
= bt_context_create();
793 ret
= bt_context_add_trace(*bt_ctx
, NULL
, "ctf",
794 lttngtop_ctf_packet_seek
, &mmap_list
, metadata_fp
);
796 printf("Error adding trace\n");
804 int setup_consumer(char *command_sock_path
, pthread_t
*threads
,
805 struct lttng_consumer_local_data
*ctx
)
809 ctx
= helper_lttng_consumer_create(HELPER_LTTNG_CONSUMER_KERNEL
,
810 read_subbuffer
, NULL
, on_recv_fd
, on_update_fd
);
814 unlink(command_sock_path
);
815 helper_lttng_consumer_set_command_sock_path(ctx
, command_sock_path
);
816 helper_lttng_consumer_init();
818 /* Create the thread to manage the receive of fd */
819 ret
= pthread_create(&threads
[0], NULL
, helper_lttng_consumer_thread_receive_fds
,
822 perror("pthread_create receive fd");
825 /* Create thread to manage the polling/writing of traces */
826 ret
= pthread_create(&threads
[1], NULL
, helper_lttng_consumer_thread_poll_fds
,
829 perror("pthread_create poll fd");
837 int setup_live_tracing()
839 struct lttng_domain dom
;
840 struct lttng_channel chan
;
841 char *channel_name
= "mmapchan";
842 struct lttng_event ev
;
844 char *command_sock_path
= "/tmp/consumerd_sock";
845 static pthread_t threads
[2]; /* recv_fd, poll */
846 struct lttng_event_context kctxpid
, kctxcomm
, kctxppid
, kctxtid
;
848 struct lttng_handle
*handle
;
850 BT_INIT_LIST_HEAD(&mmap_list
.head
);
852 lttng_consumer_stream_array
= g_ptr_array_new();
854 if ((ret
= setup_consumer(command_sock_path
, threads
, ctx
)) < 0) {
855 fprintf(stderr
,"error setting up consumer\n");
859 available_snapshots
= g_ptr_array_new();
861 /* setup the session */
862 dom
.type
= LTTNG_DOMAIN_KERNEL
;
864 ret
= unlink("/tmp/livesession");
866 lttng_destroy_session("test");
867 if ((ret
= lttng_create_session("test", "/tmp/livesession")) < 0) {
868 fprintf(stderr
,"error creating the session : %s\n",
869 helper_lttcomm_get_readable_code(ret
));
873 if ((handle
= lttng_create_handle("test", &dom
)) == NULL
) {
874 fprintf(stderr
,"error creating handle\n");
879 * FIXME : need to let the
880 * helper_lttng_consumer_thread_receive_fds create the
884 while (access(command_sock_path
, F_OK
)) {
888 if ((ret
= lttng_register_consumer(handle
, command_sock_path
)) < 0) {
889 fprintf(stderr
,"error registering consumer : %s\n",
890 helper_lttcomm_get_readable_code(ret
));
894 strcpy(chan
.name
, channel_name
);
895 chan
.attr
.overwrite
= 0;
896 // chan.attr.subbuf_size = 32768;
897 chan
.attr
.subbuf_size
= 1048576; /* 1MB */
898 chan
.attr
.num_subbuf
= 4;
899 chan
.attr
.switch_timer_interval
= 0;
900 chan
.attr
.read_timer_interval
= 200;
901 chan
.attr
.output
= LTTNG_EVENT_MMAP
;
903 if ((ret
= lttng_enable_channel(handle
, &chan
)) < 0) {
904 fprintf(stderr
,"error creating channel : %s\n",
905 helper_lttcomm_get_readable_code(ret
));
909 memset(&ev
, '\0', sizeof(struct lttng_event
));
910 //sprintf(ev.name, "sched_switch");
911 ev
.type
= LTTNG_EVENT_TRACEPOINT
;
912 if ((ret
= lttng_enable_event(handle
, &ev
, channel_name
)) < 0) {
913 fprintf(stderr
,"error enabling event : %s\n",
914 helper_lttcomm_get_readable_code(ret
));
918 ev
.type
= LTTNG_EVENT_SYSCALL
;
919 if ((ret
= lttng_enable_event(handle
, &ev
, channel_name
)) < 0) {
920 fprintf(stderr
,"error enabling syscalls : %s\n",
921 helper_lttcomm_get_readable_code(ret
));
925 kctxpid
.ctx
= LTTNG_EVENT_CONTEXT_PID
;
926 lttng_add_context(handle
, &kctxpid
, NULL
, NULL
);
927 kctxppid
.ctx
= LTTNG_EVENT_CONTEXT_PPID
;
928 lttng_add_context(handle
, &kctxppid
, NULL
, NULL
);
929 kctxcomm
.ctx
= LTTNG_EVENT_CONTEXT_PROCNAME
;
930 lttng_add_context(handle
, &kctxcomm
, NULL
, NULL
);
931 kctxtid
.ctx
= LTTNG_EVENT_CONTEXT_TID
;
932 lttng_add_context(handle
, &kctxtid
, NULL
, NULL
);
934 if ((ret
= lttng_start_tracing("test")) < 0) {
935 fprintf(stderr
,"error starting tracing : %s\n",
936 helper_lttcomm_get_readable_code(ret
));
940 helper_kernctl_buffer_flush(consumerd_metadata
);
942 /* block until metadata is ready */
943 sem_init(&metadata_available
, 0, 0);
948 lttng_destroy_session("test");
953 int main(int argc
, char **argv
)
956 struct bt_context
*bt_ctx
= NULL
;
957 struct mmap_stream
*mmap_info
;
958 unsigned long mmap_len
;
960 ret
= parse_options(argc
, argv
);
962 fprintf(stdout
, "Error parsing options.\n\n");
965 } else if (ret
> 0) {
969 if (!opt_input_path
) {
970 ret
= setup_live_tracing();
976 pthread_create(&display_thread
, NULL
, ncurses_display
, (void *) NULL
);
977 pthread_create(&timer_thread
, NULL
, refresh_thread
, (void *) NULL
);
981 live_consume(&bt_ctx
);
983 ret
= bt_context_remove_trace(bt_ctx
, 0);
985 fprintf(stderr
, "error removing trace\n");
987 bt_context_put(bt_ctx
);
991 * since we receive all FDs every time there is an
992 * update and the FD number is different every time,
993 * we don't know which one are valid.
994 * so we check if all FDs are usable with a simple
997 bt_list_for_each_entry(mmap_info
, &mmap_list
.head
, list
) {
998 ret
= helper_kernctl_get_mmap_len(mmap_info
->fd
, &mmap_len
);
1000 bt_list_del(&mmap_info
->list
);
1003 sem_post(&metadata_available
);
1006 pthread_join(timer_thread
, NULL
);
1008 pthread_join(display_thread
, NULL
);
1010 lttng_stop_tracing("test");
1011 lttng_destroy_session("test");
1017 bt_ctx
= bt_context_create();
1018 ret
= bt_context_add_traces_recursive(bt_ctx
, opt_input_path
, "ctf", NULL
);
1020 fprintf(stderr
, "[error] Opening the trace\n");
1024 ret
= check_requirements(bt_ctx
);
1026 fprintf(stderr
, "[error] some mandatory contexts were missing, exiting.\n");
1029 pthread_create(&display_thread
, NULL
, ncurses_display
, (void *) NULL
);
1030 pthread_create(&timer_thread
, NULL
, refresh_thread
, (void *) NULL
);
1034 pthread_join(display_thread
, NULL
);
1036 pthread_join(timer_thread
, NULL
);
1041 bt_context_put(bt_ctx
);