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
;
56 struct lttngtop
*copy
;
57 pthread_t display_thread
;
58 pthread_t timer_thread
;
60 unsigned long refresh_display
= 1 * NSEC_PER_SEC
;
61 unsigned long last_display_update
= 0;
64 /* list of FDs available for being read with snapshots */
65 struct mmap_stream_list mmap_list
;
66 GPtrArray
*lttng_consumer_stream_array
;
67 int sessiond_metadata
, consumerd_metadata
;
68 struct lttng_consumer_local_data
*ctx
= NULL
;
69 /* list of snapshots currently not consumed */
70 GPtrArray
*available_snapshots
;
71 sem_t metadata_available
;
74 int metadata_ready
= 0;
82 static struct poptOption long_options
[] = {
83 /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
84 { "help", 'h', POPT_ARG_NONE
, NULL
, OPT_HELP
, NULL
, NULL
},
85 { "textdump", 't', POPT_ARG_NONE
, NULL
, OPT_TEXTDUMP
, NULL
, NULL
},
86 { NULL
, 0, 0, NULL
, 0, NULL
, NULL
},
89 void *refresh_thread(void *p
)
97 sleep(refresh_display
/NSEC_PER_SEC
);
101 void *ncurses_display(void *p
)
103 unsigned int current_display_index
= 0;
105 sem_wait(&bootstrap
);
107 * Prevent the 1 second delay when we hit ESC
114 sem_wait(&goodtodisplay
);
115 sem_wait(&pause_sem
);
117 copy
= g_ptr_array_index(copies
, current_display_index
);
119 display(current_display_index
++);
121 sem_post(&goodtoupdate
);
122 sem_post(&pause_sem
);
132 * hook on each event to check the timestamp and refresh the display if
135 enum bt_cb_ret
print_timestamp(struct bt_ctf_event
*call_data
, void *private_data
)
137 unsigned long timestamp
;
139 uint64_t ts_nsec_start
;
142 timestamp
= bt_ctf_get_timestamp(call_data
);
144 start
= format_timestamp(timestamp
);
145 ts_nsec_start
= timestamp
% NSEC_PER_SEC
;
147 printf("%02d:%02d:%02d.%09" PRIu64
" %s\n", start
.tm_hour
,
148 start
.tm_min
, start
.tm_sec
, ts_nsec_start
,
149 bt_ctf_event_name(call_data
));
155 * hook on each event to check the timestamp and refresh the display if
158 enum bt_cb_ret
check_timestamp(struct bt_ctf_event
*call_data
, void *private_data
)
160 unsigned long timestamp
;
162 timestamp
= bt_ctf_get_timestamp(call_data
);
163 if (timestamp
== -1ULL)
166 if (last_display_update
== 0)
167 last_display_update
= timestamp
;
169 if (timestamp
- last_display_update
>= refresh_display
) {
170 sem_wait(&goodtoupdate
);
171 g_ptr_array_add(copies
, get_copy_lttngtop(last_display_update
,
173 sem_post(&goodtodisplay
);
174 sem_post(&bootstrap
);
175 last_display_update
= timestamp
;
180 fprintf(stderr
, "check_timestamp callback error\n");
181 return BT_CB_ERROR_STOP
;
185 * get_perf_counter : get or create and return a perf_counter struct for
186 * either a process or a cpu (only one of the 2 parameters mandatory)
188 struct perfcounter
*get_perf_counter(const char *name
, struct processtop
*proc
,
191 struct perfcounter
*ret
;
201 ret
= g_hash_table_lookup(table
, (gpointer
) name
);
205 ret
= g_new0(struct perfcounter
, 1);
206 /* by default, make it visible in the UI */
208 g_hash_table_insert(table
, (gpointer
) strdup(name
), ret
);
217 void update_perf_value(struct processtop
*proc
, struct cputime
*cpu
,
218 const char *name
, int value
)
220 struct perfcounter
*cpu_perf
, *process_perf
;
222 cpu_perf
= get_perf_counter(name
, NULL
, cpu
);
223 if (cpu_perf
->count
< value
) {
224 process_perf
= get_perf_counter(name
, proc
, NULL
);
225 process_perf
->count
+= value
- cpu_perf
->count
;
226 cpu_perf
->count
= value
;
230 void extract_perf_counter_scope(const struct bt_ctf_event
*event
,
231 const struct definition
*scope
,
232 struct processtop
*proc
,
235 struct definition
const * const *list
= NULL
;
236 const struct definition
*field
;
238 struct perfcounter
*perfcounter
;
246 ret
= bt_ctf_get_field_list(event
, scope
, &list
, &count
);
253 g_hash_table_iter_init(&iter
, global_perf_liszt
);
254 while (g_hash_table_iter_next (&iter
, &key
, (gpointer
) &perfcounter
)) {
255 field
= bt_ctf_get_field(event
, scope
, (char *) key
);
257 int value
= bt_ctf_get_uint64(field
);
258 if (bt_ctf_field_get_error())
260 update_perf_value(proc
, cpu
, (char *) key
, value
);
268 void update_perf_counter(struct processtop
*proc
, const struct bt_ctf_event
*event
)
271 const struct definition
*scope
;
273 cpu
= get_cpu(get_cpu_id(event
));
275 scope
= bt_ctf_get_top_level_scope(event
, BT_STREAM_EVENT_CONTEXT
);
276 extract_perf_counter_scope(event
, scope
, proc
, cpu
);
278 scope
= bt_ctf_get_top_level_scope(event
, BT_STREAM_PACKET_CONTEXT
);
279 extract_perf_counter_scope(event
, scope
, proc
, cpu
);
281 scope
= bt_ctf_get_top_level_scope(event
, BT_EVENT_CONTEXT
);
282 extract_perf_counter_scope(event
, scope
, proc
, cpu
);
285 enum bt_cb_ret
fix_process_table(struct bt_ctf_event
*call_data
,
290 struct processtop
*parent
, *child
;
291 unsigned long timestamp
;
293 timestamp
= bt_ctf_get_timestamp(call_data
);
294 if (timestamp
== -1ULL)
297 pid
= get_context_pid(call_data
);
301 tid
= get_context_tid(call_data
);
305 ppid
= get_context_ppid(call_data
);
309 comm
= get_context_comm(call_data
);
314 /* find or create the current process */
315 child
= find_process_tid(<tngtop
, tid
, comm
);
317 child
= add_proc(<tngtop
, tid
, comm
, timestamp
);
318 update_proc(child
, pid
, tid
, ppid
, comm
);
321 /* find or create the parent */
322 parent
= find_process_tid(<tngtop
, pid
, comm
);
324 parent
= add_proc(<tngtop
, pid
, comm
, timestamp
);
328 /* attach the parent to the current process */
329 child
->threadparent
= parent
;
330 add_thread(parent
, child
);
333 update_perf_counter(child
, call_data
);
338 return BT_CB_ERROR_STOP
;
343 copies
= g_ptr_array_new();
344 global_perf_liszt
= g_hash_table_new(g_str_hash
, g_str_equal
);
346 sem_init(&goodtodisplay
, 0, 0);
347 sem_init(&goodtoupdate
, 0, 1);
348 sem_init(&timer
, 0, 1);
349 sem_init(&bootstrap
, 0, 0);
350 sem_init(&pause_sem
, 0, 1);
351 sem_init(&end_trace_sem
, 0, 0);
353 reset_global_counters();
355 lttngtop
.nbthreads
= 0;
356 lttngtop
.nbfiles
= 0;
358 lttngtop
.process_table
= g_ptr_array_new();
359 lttngtop
.files_table
= g_ptr_array_new();
360 lttngtop
.cpu_table
= g_ptr_array_new();
365 fprintf(fp
, "LTTngTop %s\n\n", VERSION
);
366 fprintf(fp
, "Usage : lttngtop /path/to/trace\n");
370 * Return 0 if caller should continue, < 0 if caller should return
371 * error, > 0 if caller should exit without reporting error.
373 static int parse_options(int argc
, char **argv
)
378 pc
= poptGetContext(NULL
, argc
, (const char **) argv
, long_options
, 0);
379 poptReadDefaultConfig(pc
, 0);
381 while ((opt
= poptGetNextOpt(pc
)) != -1) {
385 ret
= 1; /* exit cleanly */
396 opt_input_path
= poptGetArg(pc
);
405 void iter_trace(struct bt_context
*bt_ctx
)
407 struct bt_ctf_iter
*iter
;
408 struct bt_iter_pos begin_pos
;
409 const struct bt_ctf_event
*event
;
412 begin_pos
.type
= BT_SEEK_BEGIN
;
413 iter
= bt_ctf_iter_create(bt_ctx
, &begin_pos
, NULL
);
416 bt_ctf_iter_add_callback(iter
, 0, NULL
, 0,
420 /* at each event check if we need to refresh */
421 bt_ctf_iter_add_callback(iter
, 0, NULL
, 0,
424 /* at each event, verify the status of the process table */
425 bt_ctf_iter_add_callback(iter
, 0, NULL
, 0,
428 /* to handle the scheduling events */
429 bt_ctf_iter_add_callback(iter
,
430 g_quark_from_static_string("sched_switch"),
431 NULL
, 0, handle_sched_switch
, NULL
, NULL
, NULL
);
432 /* to clean up the process table */
433 bt_ctf_iter_add_callback(iter
,
434 g_quark_from_static_string("sched_process_free"),
435 NULL
, 0, handle_sched_process_free
, NULL
, NULL
, NULL
);
436 /* to get all the process from the statedumps */
437 bt_ctf_iter_add_callback(iter
,
438 g_quark_from_static_string(
439 "lttng_statedump_process_state"),
440 NULL
, 0, handle_statedump_process_state
,
444 bt_ctf_iter_add_callback(iter
,
445 g_quark_from_static_string("exit_syscall"),
446 NULL
, 0, handle_exit_syscall
, NULL
, NULL
, NULL
);
447 bt_ctf_iter_add_callback(iter
,
448 g_quark_from_static_string("sys_write"),
449 NULL
, 0, handle_sys_write
, NULL
, NULL
, NULL
);
450 bt_ctf_iter_add_callback(iter
,
451 g_quark_from_static_string("sys_read"),
452 NULL
, 0, handle_sys_read
, NULL
, NULL
, NULL
);
453 bt_ctf_iter_add_callback(iter
,
454 g_quark_from_static_string("sys_open"),
455 NULL
, 0, handle_sys_open
, NULL
, NULL
, NULL
);
456 bt_ctf_iter_add_callback(iter
,
457 g_quark_from_static_string("sys_close"),
458 NULL
, 0, handle_sys_close
, NULL
, NULL
, NULL
);
459 bt_ctf_iter_add_callback(iter
,
460 g_quark_from_static_string(
461 "lttng_statedump_file_descriptor"),
462 NULL
, 0, handle_statedump_file_descriptor
,
466 while ((event
= bt_ctf_iter_read_event(iter
)) != NULL
) {
467 ret
= bt_iter_next(bt_ctf_get_iter(iter
));
472 /* block until quit, we reached the end of the trace */
473 sem_wait(&end_trace_sem
);
476 bt_ctf_iter_destroy(iter
);
480 * bt_context_add_traces_recursive: Open a trace recursively
481 * (copied from BSD code in converter/babeltrace.c)
483 * Find each trace present in the subdirectory starting from the given
484 * path, and add them to the context. The packet_seek parameter can be
485 * NULL: this specify to use the default format packet_seek.
487 * Return: 0 on success, nonzero on failure.
488 * Unable to open toplevel: failure.
489 * Unable to open some subdirectory or file: warn and continue;
491 int bt_context_add_traces_recursive(struct bt_context
*ctx
, const char *path
,
492 const char *format_str
,
493 void (*packet_seek
)(struct stream_pos
*pos
,
494 size_t offset
, int whence
))
499 char lpath
[PATH_MAX
];
500 char * const paths
[2] = { lpath
, NULL
};
504 * Need to copy path, because fts_open can change it.
505 * It is the pointer array, not the strings, that are constant.
507 strncpy(lpath
, path
, PATH_MAX
);
508 lpath
[PATH_MAX
- 1] = '\0';
510 tree
= fts_open(paths
, FTS_NOCHDIR
| FTS_LOGICAL
, 0);
512 fprintf(stderr
, "[error] [Context] Cannot traverse \"%s\" for reading.\n",
517 trace_ids
= g_array_new(FALSE
, TRUE
, sizeof(int));
519 while ((node
= fts_read(tree
))) {
522 if (!(node
->fts_info
& FTS_D
))
525 dirfd
= open(node
->fts_accpath
, 0);
527 fprintf(stderr
, "[error] [Context] Unable to open trace "
528 "directory file descriptor.\n");
532 metafd
= openat(dirfd
, "metadata", O_RDONLY
);
551 trace_id
= bt_context_add_trace(ctx
,
552 node
->fts_accpath
, format_str
,
553 packet_seek
, NULL
, NULL
);
555 fprintf(stderr
, "[warning] [Context] opening trace \"%s\" from %s "
556 "for reading.\n", node
->fts_accpath
, path
);
557 /* Allow to skip erroneous traces. */
560 g_array_append_val(trace_ids
, trace_id
);
564 g_array_free(trace_ids
, TRUE
);
571 static int check_field_requirements(const struct bt_ctf_field_decl
*const * field_list
,
572 int field_cnt
, int *tid_check
, int *pid_check
,
573 int *procname_check
, int *ppid_check
)
576 struct perfcounter
*global
;
579 for (j
= 0; j
< field_cnt
; j
++) {
580 name
= bt_ctf_get_decl_field_name(field_list
[j
]);
581 if (*tid_check
== 0) {
582 if (strncmp(name
, "tid", 3) == 0)
585 if (*pid_check
== 0) {
586 if (strncmp(name
, "tid", 3) == 0)
589 if (*ppid_check
== 0) {
590 if (strncmp(name
, "ppid", 4) == 0)
593 if (*procname_check
== 0) {
594 if (strncmp(name
, "procname", 8) == 0)
597 if (strncmp(name
, "perf_", 5) == 0) {
598 global
= g_hash_table_lookup(global_perf_liszt
, (gpointer
) name
);
600 global
= g_new0(struct perfcounter
, 1);
601 /* by default, sort on the first perf context */
602 if (g_hash_table_size(global_perf_liszt
) == 0)
605 g_hash_table_insert(global_perf_liszt
, (gpointer
) strdup(name
), global
);
610 if (*tid_check
== 1 && *pid_check
== 1 && *ppid_check
== 1 &&
611 *procname_check
== 1)
618 * check_requirements: check if the required context informations are available
620 * If each mandatory context information is available for at least in one
621 * event, return 0 otherwise return -1.
623 int check_requirements(struct bt_context
*ctx
)
625 unsigned int i
, evt_cnt
, field_cnt
;
626 struct bt_ctf_event_decl
*const * evt_list
;
627 const struct bt_ctf_field_decl
*const * field_list
;
630 int procname_check
= 0;
634 bt_ctf_get_event_decl_list(0, ctx
, &evt_list
, &evt_cnt
);
635 for (i
= 0; i
< evt_cnt
; i
++) {
636 bt_ctf_get_decl_fields(evt_list
[i
], BT_STREAM_EVENT_CONTEXT
,
637 &field_list
, &field_cnt
);
638 ret
= check_field_requirements(field_list
, field_cnt
,
639 &tid_check
, &pid_check
, &procname_check
,
642 bt_ctf_get_decl_fields(evt_list
[i
], BT_EVENT_CONTEXT
,
643 &field_list
, &field_cnt
);
644 ret
= check_field_requirements(field_list
, field_cnt
,
645 &tid_check
, &pid_check
, &procname_check
,
648 bt_ctf_get_decl_fields(evt_list
[i
], BT_STREAM_PACKET_CONTEXT
,
649 &field_list
, &field_cnt
);
650 ret
= check_field_requirements(field_list
, field_cnt
,
651 &tid_check
, &pid_check
, &procname_check
,
655 if (tid_check
== 0) {
657 fprintf(stderr
, "[error] missing tid context information\n");
659 if (pid_check
== 0) {
661 fprintf(stderr
, "[error] missing pid context information\n");
663 if (ppid_check
== 0) {
665 fprintf(stderr
, "[error] missing ppid context information\n");
667 if (procname_check
== 0) {
669 fprintf(stderr
, "[error] missing procname context information\n");
675 ssize_t
read_subbuffer(struct lttng_consumer_stream
*kconsumerd_fd
,
676 struct lttng_consumer_local_data
*ctx
)
681 int infd
= helper_get_lttng_consumer_stream_wait_fd(kconsumerd_fd
);
683 if (helper_get_lttng_consumer_stream_output(kconsumerd_fd
) == LTTNG_EVENT_SPLICE
) {
684 /* Get the next subbuffer */
685 err
= helper_kernctl_get_next_subbuf(infd
);
688 perror("Reserving sub buffer failed (everything is normal, "
689 "it is due to concurrency)");
692 /* read the whole subbuffer */
693 err
= helper_kernctl_get_padded_subbuf_size(infd
, &len
);
696 perror("Getting sub-buffer len failed.");
700 /* splice the subbuffer to the tracefile */
701 ret
= helper_lttng_consumer_on_read_subbuffer_splice(ctx
, kconsumerd_fd
, len
);
704 * display the error but continue processing to try
705 * to release the subbuffer
707 fprintf(stderr
,"Error splicing to tracefile\n");
709 err
= helper_kernctl_put_next_subbuf(infd
);
712 perror("Reserving sub buffer failed (everything is normal, "
713 "it is due to concurrency)");
716 sem_post(&metadata_available
);
723 int on_update_fd(int key
, uint32_t state
)
725 /* let the lib handle the metadata FD */
726 if (key
== sessiond_metadata
)
731 int on_recv_fd(struct lttng_consumer_stream
*kconsumerd_fd
)
734 struct mmap_stream
*new_mmap_stream
;
736 /* Opening the tracefile in write mode */
737 if (helper_get_lttng_consumer_stream_path_name(kconsumerd_fd
) != NULL
) {
738 ret
= open(helper_get_lttng_consumer_stream_path_name(kconsumerd_fd
),
739 O_WRONLY
|O_CREAT
|O_TRUNC
, S_IRWXU
|S_IRWXG
|S_IRWXO
);
744 helper_set_lttng_consumer_stream_out_fd(kconsumerd_fd
, ret
);
747 if (helper_get_lttng_consumer_stream_output(kconsumerd_fd
) == LTTNG_EVENT_MMAP
) {
748 new_mmap_stream
= malloc(sizeof(struct mmap_stream
));
749 new_mmap_stream
->fd
= helper_get_lttng_consumer_stream_wait_fd(
751 bt_list_add(&new_mmap_stream
->list
, &mmap_list
.head
);
753 g_ptr_array_add(lttng_consumer_stream_array
, kconsumerd_fd
);
754 /* keep mmap FDs internally */
757 consumerd_metadata
= helper_get_lttng_consumer_stream_wait_fd(kconsumerd_fd
);
758 sessiond_metadata
= helper_get_lttng_consumer_stream_key(kconsumerd_fd
);
768 struct bt_context
*bt_ctx
= NULL
;
771 if (!metadata_ready
) {
772 sem_wait(&metadata_available
);
773 if (access("/tmp/livesession/kernel/metadata", F_OK
) != 0) {
774 fprintf(stderr
,"no metadata\n");
778 metadata_fp
= fopen("/tmp/livesession/kernel/metadata", "r");
782 bt_ctx
= bt_context_create();
783 ret
= bt_context_add_trace(bt_ctx
, NULL
, "ctf",
784 lttngtop_ctf_packet_seek
, &mmap_list
, metadata_fp
);
786 printf("Error adding trace\n");
796 int setup_consumer(char *command_sock_path
, pthread_t
*threads
,
797 struct lttng_consumer_local_data
*ctx
)
801 ctx
= helper_lttng_consumer_create(HELPER_LTTNG_CONSUMER_KERNEL
,
802 read_subbuffer
, NULL
, on_recv_fd
, on_update_fd
);
806 unlink(command_sock_path
);
807 helper_lttng_consumer_set_command_sock_path(ctx
, command_sock_path
);
808 helper_lttng_consumer_init();
810 /* Create the thread to manage the receive of fd */
811 ret
= pthread_create(&threads
[0], NULL
, helper_lttng_consumer_thread_receive_fds
,
814 perror("pthread_create receive fd");
817 /* Create thread to manage the polling/writing of traces */
818 ret
= pthread_create(&threads
[1], NULL
, helper_lttng_consumer_thread_poll_fds
,
821 perror("pthread_create poll fd");
829 void *setup_live_tracing()
831 struct lttng_domain dom
;
832 struct lttng_channel chan
;
833 char *channel_name
= "mmapchan";
834 struct lttng_event ev
;
836 char *command_sock_path
= "/tmp/consumerd_sock";
837 static pthread_t threads
[2]; /* recv_fd, poll */
838 struct lttng_event_context kctxpid
, kctxcomm
, kctxppid
, kctxtid
;
840 struct lttng_handle
*handle
;
842 BT_INIT_LIST_HEAD(&mmap_list
.head
);
844 lttng_consumer_stream_array
= g_ptr_array_new();
846 if ((ret
= setup_consumer(command_sock_path
, threads
, ctx
)) < 0) {
847 fprintf(stderr
,"error setting up consumer\n");
851 available_snapshots
= g_ptr_array_new();
853 /* setup the session */
854 dom
.type
= LTTNG_DOMAIN_KERNEL
;
856 ret
= system("rm -rf /tmp/livesession");
858 lttng_destroy_session("test");
859 if ((ret
= lttng_create_session("test", "/tmp/livesession")) < 0) {
860 fprintf(stderr
,"error creating the session : %s\n",
861 helper_lttcomm_get_readable_code(ret
));
865 if ((handle
= lttng_create_handle("test", &dom
)) == NULL
) {
866 fprintf(stderr
,"error creating handle\n");
870 if ((ret
= lttng_register_consumer(handle
, command_sock_path
)) < 0) {
871 fprintf(stderr
,"error registering consumer : %s\n",
872 helper_lttcomm_get_readable_code(ret
));
876 strcpy(chan
.name
, channel_name
);
877 chan
.attr
.overwrite
= 0;
878 // chan.attr.subbuf_size = 32768;
879 chan
.attr
.subbuf_size
= 1048576; /* 1MB */
880 chan
.attr
.num_subbuf
= 4;
881 chan
.attr
.switch_timer_interval
= 0;
882 chan
.attr
.read_timer_interval
= 200;
883 chan
.attr
.output
= LTTNG_EVENT_MMAP
;
885 if ((ret
= lttng_enable_channel(handle
, &chan
)) < 0) {
886 fprintf(stderr
,"error creating channel : %s\n",
887 helper_lttcomm_get_readable_code(ret
));
891 memset(&ev
, '\0', sizeof(struct lttng_event
));
892 //sprintf(ev.name, "sched_switch");
893 ev
.type
= LTTNG_EVENT_TRACEPOINT
;
894 if ((ret
= lttng_enable_event(handle
, &ev
, channel_name
)) < 0) {
895 fprintf(stderr
,"error enabling event : %s\n",
896 helper_lttcomm_get_readable_code(ret
));
900 ev
.type
= LTTNG_EVENT_SYSCALL
;
901 if ((ret
= lttng_enable_event(handle
, &ev
, channel_name
)) < 0) {
902 fprintf(stderr
,"error enabling syscalls : %s\n",
903 helper_lttcomm_get_readable_code(ret
));
907 kctxpid
.ctx
= LTTNG_EVENT_CONTEXT_PID
;
908 lttng_add_context(handle
, &kctxpid
, NULL
, NULL
);
909 kctxppid
.ctx
= LTTNG_EVENT_CONTEXT_PPID
;
910 lttng_add_context(handle
, &kctxppid
, NULL
, NULL
);
911 kctxcomm
.ctx
= LTTNG_EVENT_CONTEXT_PROCNAME
;
912 lttng_add_context(handle
, &kctxcomm
, NULL
, NULL
);
913 kctxtid
.ctx
= LTTNG_EVENT_CONTEXT_TID
;
914 lttng_add_context(handle
, &kctxtid
, NULL
, NULL
);
916 if ((ret
= lttng_start_tracing("test")) < 0) {
917 fprintf(stderr
,"error starting tracing : %s\n",
918 helper_lttcomm_get_readable_code(ret
));
922 helper_kernctl_buffer_flush(consumerd_metadata
);
924 /* block until metadata is ready */
925 sem_init(&metadata_available
, 0, 0);
931 int main(int argc
, char **argv
)
934 struct bt_context
*bt_ctx
= NULL
;
936 ret
= parse_options(argc
, argv
);
938 fprintf(stdout
, "Error parsing options.\n\n");
941 } else if (ret
> 0) {
945 if (!opt_input_path
) {
946 setup_live_tracing();
949 pthread_create(&display_thread
, NULL
, ncurses_display
, (void *) NULL
);
950 pthread_create(&timer_thread
, NULL
, refresh_thread
, (void *) NULL
);
955 lttng_stop_tracing("test");
956 lttng_destroy_session("test");
962 bt_ctx
= bt_context_create();
963 ret
= bt_context_add_traces_recursive(bt_ctx
, opt_input_path
, "ctf", NULL
);
965 fprintf(stderr
, "[error] Opening the trace\n");
969 ret
= check_requirements(bt_ctx
);
971 fprintf(stderr
, "[error] some mandatory contexts were missing, exiting.\n");
974 pthread_create(&display_thread
, NULL
, ncurses_display
, (void *) NULL
);
975 pthread_create(&timer_thread
, NULL
, refresh_thread
, (void *) NULL
);
980 pthread_join(display_thread
, NULL
);
981 pthread_join(timer_thread
, NULL
);
986 bt_context_put(bt_ctx
);