flush at every second
[lttngtop.git] / src / lttngtop.c
CommitLineData
1fc22eb4 1/*
aa15ac1c 2 * Copyright (C) 2011-2012 Julien Desfossez
1fc22eb4
JD
3 *
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;
7 *
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.
12 *
71bd7ce1
AM
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.
1fc22eb4
JD
16 */
17
18#define _GNU_SOURCE
19#include <config.h>
20#include <stdio.h>
21#include <stdint.h>
22#include <babeltrace/babeltrace.h>
23#include <babeltrace/ctf/events.h>
24#include <babeltrace/ctf/callbacks.h>
3ba84bed 25#include <babeltrace/ctf/iterator.h>
1fc22eb4
JD
26#include <fcntl.h>
27#include <pthread.h>
28#include <popt.h>
29#include <stdlib.h>
30#include <ftw.h>
31#include <dirent.h>
32#include <ctype.h>
33#include <sys/stat.h>
34#include <unistd.h>
35#include <string.h>
36#include <errno.h>
37#include <sys/types.h>
38#include <fts.h>
85db4618 39#include <assert.h>
16b22a0f
JD
40#include <sys/mman.h>
41#include <lttng/lttng.h>
42#include <lttng/lttngtop-helper.h>
c78f2cdc 43#include <babeltrace/lttngtopmmappacketseek.h>
1fc22eb4
JD
44
45#include "lttngtoptypes.h"
46#include "cputop.h"
47#include "iostreamtop.h"
48#include "cursesdisplay.h"
49#include "common.h"
50
51#define DEFAULT_FILE_ARRAY_SIZE 1
52
53const char *opt_input_path;
6777529d 54int opt_textdump;
1fc22eb4
JD
55
56struct lttngtop *copy;
57pthread_t display_thread;
58pthread_t timer_thread;
59
60unsigned long refresh_display = 1 * NSEC_PER_SEC;
61unsigned long last_display_update = 0;
62int quit = 0;
63
16b22a0f
JD
64/* list of FDs available for being read with snapshots */
65struct mmap_stream_list mmap_list;
66GPtrArray *lttng_consumer_stream_array;
67int sessiond_metadata, consumerd_metadata;
4e6aeb3d
JD
68struct lttng_consumer_local_data *ctx = NULL;
69/* list of snapshots currently not consumed */
70GPtrArray *available_snapshots;
71sem_t metadata_available;
72FILE *metadata_fp;
73int trace_opened = 0;
74int metadata_ready = 0;
16b22a0f 75
1fc22eb4
JD
76enum {
77 OPT_NONE = 0,
78 OPT_HELP,
6777529d 79 OPT_TEXTDUMP,
1fc22eb4
JD
80};
81
82static struct poptOption long_options[] = {
83 /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
84 { "help", 'h', POPT_ARG_NONE, NULL, OPT_HELP, NULL, NULL },
6777529d 85 { "textdump", 't', POPT_ARG_NONE, NULL, OPT_TEXTDUMP, NULL, NULL },
1fc22eb4
JD
86 { NULL, 0, 0, NULL, 0, NULL, NULL },
87};
88
89void *refresh_thread(void *p)
90{
cade3418
JD
91 struct mmap_stream *mmap_info;
92
1fc22eb4 93 while (1) {
85db4618
JD
94 if (quit)
95 return NULL;
cade3418
JD
96 bt_list_for_each_entry(mmap_info, &mmap_list.head, list)
97 helper_kernctl_buffer_flush(mmap_info->fd);
1fc22eb4
JD
98 sem_wait(&pause_sem);
99 sem_post(&pause_sem);
100 sem_post(&timer);
101 sleep(refresh_display/NSEC_PER_SEC);
102 }
103}
104
105void *ncurses_display(void *p)
106{
107 unsigned int current_display_index = 0;
108
109 sem_wait(&bootstrap);
b332d28f
JD
110 /*
111 * Prevent the 1 second delay when we hit ESC
112 */
113 ESCDELAY = 0;
1fc22eb4
JD
114 init_ncurses();
115
116 while (1) {
117 sem_wait(&timer);
118 sem_wait(&goodtodisplay);
119 sem_wait(&pause_sem);
120
121 copy = g_ptr_array_index(copies, current_display_index);
85db4618
JD
122 assert(copy);
123 display(current_display_index++);
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JD
124
125 sem_post(&goodtoupdate);
126 sem_post(&pause_sem);
127
128 if (quit) {
129 reset_ncurses();
130 pthread_exit(0);
131 }
132 }
133}
134
6112d0d4
JD
135/*
136 * hook on each event to check the timestamp and refresh the display if
137 * necessary
138 */
139enum bt_cb_ret print_timestamp(struct bt_ctf_event *call_data, void *private_data)
140{
141 unsigned long timestamp;
142 struct tm start;
b520ab45 143 uint64_t ts_nsec_start;
6112d0d4 144
6112d0d4
JD
145 timestamp = bt_ctf_get_timestamp(call_data);
146
b520ab45 147 start = format_timestamp(timestamp);
6112d0d4
JD
148 ts_nsec_start = timestamp % NSEC_PER_SEC;
149
71c74ca6
JD
150 printf("%02d:%02d:%02d.%09" PRIu64 " %s\n", start.tm_hour,
151 start.tm_min, start.tm_sec, ts_nsec_start,
152 bt_ctf_event_name(call_data));
6112d0d4
JD
153
154 return BT_CB_OK;
155}
156
1fc22eb4
JD
157/*
158 * hook on each event to check the timestamp and refresh the display if
159 * necessary
160 */
4adc8274 161enum bt_cb_ret check_timestamp(struct bt_ctf_event *call_data, void *private_data)
1fc22eb4
JD
162{
163 unsigned long timestamp;
164
c78f2cdc 165 timestamp = bt_ctf_get_timestamp(call_data);
1fc22eb4
JD
166 if (timestamp == -1ULL)
167 goto error;
168
169 if (last_display_update == 0)
170 last_display_update = timestamp;
171
172 if (timestamp - last_display_update >= refresh_display) {
173 sem_wait(&goodtoupdate);
174 g_ptr_array_add(copies, get_copy_lttngtop(last_display_update,
175 timestamp));
176 sem_post(&goodtodisplay);
177 sem_post(&bootstrap);
178 last_display_update = timestamp;
179 }
180 return BT_CB_OK;
181
182error:
183 fprintf(stderr, "check_timestamp callback error\n");
184 return BT_CB_ERROR_STOP;
185}
186
187/*
188 * get_perf_counter : get or create and return a perf_counter struct for
189 * either a process or a cpu (only one of the 2 parameters mandatory)
190 */
191struct perfcounter *get_perf_counter(const char *name, struct processtop *proc,
192 struct cputime *cpu)
193{
bb6d72a2 194 struct perfcounter *ret;
1fc22eb4
JD
195 GHashTable *table;
196
197 if (proc)
198 table = proc->perf;
199 else if (cpu)
200 table = cpu->perf;
201 else
202 goto error;
203
204 ret = g_hash_table_lookup(table, (gpointer) name);
205 if (ret)
206 goto end;
207
559c9f86 208 ret = g_new0(struct perfcounter, 1);
1fc22eb4
JD
209 /* by default, make it visible in the UI */
210 ret->visible = 1;
85db4618 211 g_hash_table_insert(table, (gpointer) strdup(name), ret);
1fc22eb4 212
1fc22eb4
JD
213end:
214 return ret;
215
216error:
217 return NULL;
218}
219
220void update_perf_value(struct processtop *proc, struct cputime *cpu,
221 const char *name, int value)
222{
223 struct perfcounter *cpu_perf, *process_perf;
224
225 cpu_perf = get_perf_counter(name, NULL, cpu);
226 if (cpu_perf->count < value) {
227 process_perf = get_perf_counter(name, proc, NULL);
228 process_perf->count += value - cpu_perf->count;
229 cpu_perf->count = value;
230 }
231}
232
4adc8274 233void extract_perf_counter_scope(const struct bt_ctf_event *event,
2e0a1190 234 const struct bt_definition *scope,
1fc22eb4
JD
235 struct processtop *proc,
236 struct cputime *cpu)
237{
2e0a1190
JD
238 struct bt_definition const * const *list = NULL;
239 const struct bt_definition *field;
1fc22eb4 240 unsigned int count;
bb6d72a2
JD
241 struct perfcounter *perfcounter;
242 GHashTableIter iter;
243 gpointer key;
244 int ret;
1fc22eb4
JD
245
246 if (!scope)
247 goto end;
248
249 ret = bt_ctf_get_field_list(event, scope, &list, &count);
250 if (ret < 0)
251 goto end;
252
bb6d72a2
JD
253 if (count == 0)
254 goto end;
255
256 g_hash_table_iter_init(&iter, global_perf_liszt);
257 while (g_hash_table_iter_next (&iter, &key, (gpointer) &perfcounter)) {
258 field = bt_ctf_get_field(event, scope, (char *) key);
259 if (field) {
260 int value = bt_ctf_get_uint64(field);
1fc22eb4
JD
261 if (bt_ctf_field_get_error())
262 continue;
bb6d72a2 263 update_perf_value(proc, cpu, (char *) key, value);
1fc22eb4
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264 }
265 }
266
267end:
268 return;
269}
270
4adc8274 271void update_perf_counter(struct processtop *proc, const struct bt_ctf_event *event)
1fc22eb4 272{
1fc22eb4 273 struct cputime *cpu;
2e0a1190 274 const struct bt_definition *scope;
1fc22eb4 275
d67167cd 276 cpu = get_cpu(get_cpu_id(event));
1fc22eb4
JD
277
278 scope = bt_ctf_get_top_level_scope(event, BT_STREAM_EVENT_CONTEXT);
279 extract_perf_counter_scope(event, scope, proc, cpu);
280
281 scope = bt_ctf_get_top_level_scope(event, BT_STREAM_PACKET_CONTEXT);
282 extract_perf_counter_scope(event, scope, proc, cpu);
283
284 scope = bt_ctf_get_top_level_scope(event, BT_EVENT_CONTEXT);
285 extract_perf_counter_scope(event, scope, proc, cpu);
1fc22eb4
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286}
287
4adc8274 288enum bt_cb_ret fix_process_table(struct bt_ctf_event *call_data,
1fc22eb4
JD
289 void *private_data)
290{
291 int pid, tid, ppid;
292 char *comm;
293 struct processtop *parent, *child;
1fc22eb4
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294 unsigned long timestamp;
295
c78f2cdc 296 timestamp = bt_ctf_get_timestamp(call_data);
1fc22eb4
JD
297 if (timestamp == -1ULL)
298 goto error;
299
1dec520a
JD
300 pid = get_context_pid(call_data);
301 if (pid == -1ULL) {
1fc22eb4
JD
302 goto error;
303 }
1dec520a
JD
304 tid = get_context_tid(call_data);
305 if (tid == -1ULL) {
1fc22eb4
JD
306 goto error;
307 }
1dec520a
JD
308 ppid = get_context_ppid(call_data);
309 if (ppid == -1ULL) {
1fc22eb4
JD
310 goto error;
311 }
1dec520a
JD
312 comm = get_context_comm(call_data);
313 if (!comm) {
1fc22eb4
JD
314 goto error;
315 }
316
317 /* find or create the current process */
318 child = find_process_tid(&lttngtop, tid, comm);
319 if (!child)
320 child = add_proc(&lttngtop, tid, comm, timestamp);
321 update_proc(child, pid, tid, ppid, comm);
322
323 if (pid != tid) {
324 /* find or create the parent */
325 parent = find_process_tid(&lttngtop, pid, comm);
326 if (!parent) {
327 parent = add_proc(&lttngtop, pid, comm, timestamp);
328 parent->pid = pid;
329 }
330
331 /* attach the parent to the current process */
332 child->threadparent = parent;
333 add_thread(parent, child);
334 }
335
336 update_perf_counter(child, call_data);
337
338 return BT_CB_OK;
339
340error:
341 return BT_CB_ERROR_STOP;
342}
343
344void init_lttngtop()
345{
346 copies = g_ptr_array_new();
0d91c12a 347 global_perf_liszt = g_hash_table_new(g_str_hash, g_str_equal);
1fc22eb4
JD
348
349 sem_init(&goodtodisplay, 0, 0);
350 sem_init(&goodtoupdate, 0, 1);
351 sem_init(&timer, 0, 1);
352 sem_init(&bootstrap, 0, 0);
353 sem_init(&pause_sem, 0, 1);
354 sem_init(&end_trace_sem, 0, 0);
355
e05a35a6
JD
356 reset_global_counters();
357 lttngtop.nbproc = 0;
358 lttngtop.nbthreads = 0;
359 lttngtop.nbfiles = 0;
360
30b646c4
JD
361 lttngtop.process_hash_table = g_hash_table_new(g_direct_hash,
362 g_direct_equal);
1fc22eb4
JD
363 lttngtop.process_table = g_ptr_array_new();
364 lttngtop.files_table = g_ptr_array_new();
365 lttngtop.cpu_table = g_ptr_array_new();
366}
367
c263c4eb 368void usage(FILE *fp)
1fc22eb4 369{
c263c4eb
JD
370 fprintf(fp, "LTTngTop %s\n\n", VERSION);
371 fprintf(fp, "Usage : lttngtop /path/to/trace\n");
1fc22eb4
JD
372}
373
374/*
375 * Return 0 if caller should continue, < 0 if caller should return
376 * error, > 0 if caller should exit without reporting error.
377 */
378static int parse_options(int argc, char **argv)
379{
380 poptContext pc;
381 int opt, ret = 0;
382
1fc22eb4
JD
383 pc = poptGetContext(NULL, argc, (const char **) argv, long_options, 0);
384 poptReadDefaultConfig(pc, 0);
385
386 while ((opt = poptGetNextOpt(pc)) != -1) {
387 switch (opt) {
388 case OPT_HELP:
389 usage(stdout);
390 ret = 1; /* exit cleanly */
391 goto end;
6777529d
JD
392 case OPT_TEXTDUMP:
393 opt_textdump = 1;
394 goto end;
1fc22eb4
JD
395 default:
396 ret = -EINVAL;
397 goto end;
398 }
399 }
400
401 opt_input_path = poptGetArg(pc);
16b22a0f 402
1fc22eb4
JD
403end:
404 if (pc) {
405 poptFreeContext(pc);
406 }
407 return ret;
408}
409
410void iter_trace(struct bt_context *bt_ctx)
411{
412 struct bt_ctf_iter *iter;
413 struct bt_iter_pos begin_pos;
4adc8274 414 const struct bt_ctf_event *event;
1fc22eb4
JD
415 int ret = 0;
416
417 begin_pos.type = BT_SEEK_BEGIN;
418 iter = bt_ctf_iter_create(bt_ctx, &begin_pos, NULL);
419
6777529d
JD
420 if (opt_textdump) {
421 bt_ctf_iter_add_callback(iter, 0, NULL, 0,
422 print_timestamp,
423 NULL, NULL, NULL);
424 } else {
425 /* at each event check if we need to refresh */
426 bt_ctf_iter_add_callback(iter, 0, NULL, 0,
427 check_timestamp,
428 NULL, NULL, NULL);
429 /* at each event, verify the status of the process table */
430 bt_ctf_iter_add_callback(iter, 0, NULL, 0,
431 fix_process_table,
432 NULL, NULL, NULL);
433 /* to handle the scheduling events */
434 bt_ctf_iter_add_callback(iter,
435 g_quark_from_static_string("sched_switch"),
436 NULL, 0, handle_sched_switch, NULL, NULL, NULL);
437 /* to clean up the process table */
438 bt_ctf_iter_add_callback(iter,
439 g_quark_from_static_string("sched_process_free"),
440 NULL, 0, handle_sched_process_free, NULL, NULL, NULL);
441 /* to get all the process from the statedumps */
442 bt_ctf_iter_add_callback(iter,
443 g_quark_from_static_string(
444 "lttng_statedump_process_state"),
445 NULL, 0, handle_statedump_process_state,
446 NULL, NULL, NULL);
447
448 /* for IO top */
449 bt_ctf_iter_add_callback(iter,
450 g_quark_from_static_string("exit_syscall"),
451 NULL, 0, handle_exit_syscall, NULL, NULL, NULL);
452 bt_ctf_iter_add_callback(iter,
453 g_quark_from_static_string("sys_write"),
454 NULL, 0, handle_sys_write, NULL, NULL, NULL);
455 bt_ctf_iter_add_callback(iter,
456 g_quark_from_static_string("sys_read"),
457 NULL, 0, handle_sys_read, NULL, NULL, NULL);
458 bt_ctf_iter_add_callback(iter,
459 g_quark_from_static_string("sys_open"),
460 NULL, 0, handle_sys_open, NULL, NULL, NULL);
461 bt_ctf_iter_add_callback(iter,
462 g_quark_from_static_string("sys_close"),
463 NULL, 0, handle_sys_close, NULL, NULL, NULL);
464 bt_ctf_iter_add_callback(iter,
465 g_quark_from_static_string(
ceb3a221 466 "lttng_statedump_file_descriptor"),
6777529d
JD
467 NULL, 0, handle_statedump_file_descriptor,
468 NULL, NULL, NULL);
469 }
470
1fc22eb4
JD
471 while ((event = bt_ctf_iter_read_event(iter)) != NULL) {
472 ret = bt_iter_next(bt_ctf_get_iter(iter));
473 if (ret < 0)
474 goto end_iter;
475 }
476
477 /* block until quit, we reached the end of the trace */
478 sem_wait(&end_trace_sem);
479
480end_iter:
06570214 481 bt_ctf_iter_destroy(iter);
1fc22eb4
JD
482}
483
484/*
485 * bt_context_add_traces_recursive: Open a trace recursively
486 * (copied from BSD code in converter/babeltrace.c)
487 *
488 * Find each trace present in the subdirectory starting from the given
489 * path, and add them to the context. The packet_seek parameter can be
490 * NULL: this specify to use the default format packet_seek.
491 *
492 * Return: 0 on success, nonzero on failure.
493 * Unable to open toplevel: failure.
494 * Unable to open some subdirectory or file: warn and continue;
495 */
496int bt_context_add_traces_recursive(struct bt_context *ctx, const char *path,
497 const char *format_str,
2e0a1190 498 void (*packet_seek)(struct bt_stream_pos *pos,
1fc22eb4
JD
499 size_t offset, int whence))
500{
501 FTS *tree;
502 FTSENT *node;
503 GArray *trace_ids;
504 char lpath[PATH_MAX];
505 char * const paths[2] = { lpath, NULL };
0d567cf1 506 int ret = -1;
1fc22eb4
JD
507
508 /*
509 * Need to copy path, because fts_open can change it.
510 * It is the pointer array, not the strings, that are constant.
511 */
512 strncpy(lpath, path, PATH_MAX);
513 lpath[PATH_MAX - 1] = '\0';
514
515 tree = fts_open(paths, FTS_NOCHDIR | FTS_LOGICAL, 0);
516 if (tree == NULL) {
517 fprintf(stderr, "[error] [Context] Cannot traverse \"%s\" for reading.\n",
518 path);
519 return -EINVAL;
520 }
521
522 trace_ids = g_array_new(FALSE, TRUE, sizeof(int));
523
524 while ((node = fts_read(tree))) {
525 int dirfd, metafd;
526
527 if (!(node->fts_info & FTS_D))
528 continue;
529
530 dirfd = open(node->fts_accpath, 0);
531 if (dirfd < 0) {
532 fprintf(stderr, "[error] [Context] Unable to open trace "
533 "directory file descriptor.\n");
534 ret = dirfd;
535 goto error;
536 }
537 metafd = openat(dirfd, "metadata", O_RDONLY);
538 if (metafd < 0) {
7314c855
JD
539 close(dirfd);
540 ret = -1;
541 continue;
1fc22eb4
JD
542 } else {
543 int trace_id;
544
545 ret = close(metafd);
546 if (ret < 0) {
547 perror("close");
548 goto error;
549 }
550 ret = close(dirfd);
551 if (ret < 0) {
552 perror("close");
553 goto error;
554 }
555
556 trace_id = bt_context_add_trace(ctx,
557 node->fts_accpath, format_str,
558 packet_seek, NULL, NULL);
559 if (trace_id < 0) {
0d567cf1 560 fprintf(stderr, "[warning] [Context] opening trace \"%s\" from %s "
1fc22eb4 561 "for reading.\n", node->fts_accpath, path);
0d567cf1
JD
562 /* Allow to skip erroneous traces. */
563 continue;
1fc22eb4
JD
564 }
565 g_array_append_val(trace_ids, trace_id);
566 }
567 }
568
569 g_array_free(trace_ids, TRUE);
0d567cf1 570 return ret;
1fc22eb4
JD
571
572error:
573 return ret;
574}
575
4553b4d1 576static int check_field_requirements(const struct bt_ctf_field_decl *const * field_list,
a54d0d2c
JD
577 int field_cnt, int *tid_check, int *pid_check,
578 int *procname_check, int *ppid_check)
579{
580 int j;
bb6d72a2
JD
581 struct perfcounter *global;
582 const char *name;
a54d0d2c
JD
583
584 for (j = 0; j < field_cnt; j++) {
bb6d72a2 585 name = bt_ctf_get_decl_field_name(field_list[j]);
a54d0d2c 586 if (*tid_check == 0) {
bb6d72a2 587 if (strncmp(name, "tid", 3) == 0)
a54d0d2c 588 (*tid_check)++;
a54d0d2c
JD
589 }
590 if (*pid_check == 0) {
da401e9c 591 if (strncmp(name, "pid", 3) == 0)
a54d0d2c
JD
592 (*pid_check)++;
593 }
594 if (*ppid_check == 0) {
bb6d72a2 595 if (strncmp(name, "ppid", 4) == 0)
a54d0d2c
JD
596 (*ppid_check)++;
597 }
598 if (*procname_check == 0) {
bb6d72a2 599 if (strncmp(name, "procname", 8) == 0)
a54d0d2c
JD
600 (*procname_check)++;
601 }
bb6d72a2
JD
602 if (strncmp(name, "perf_", 5) == 0) {
603 global = g_hash_table_lookup(global_perf_liszt, (gpointer) name);
604 if (!global) {
605 global = g_new0(struct perfcounter, 1);
606 /* by default, sort on the first perf context */
607 if (g_hash_table_size(global_perf_liszt) == 0)
608 global->sort = 1;
609 global->visible = 1;
610 g_hash_table_insert(global_perf_liszt, (gpointer) strdup(name), global);
611 }
612 }
a54d0d2c 613 }
bb6d72a2 614
a54d0d2c
JD
615 if (*tid_check == 1 && *pid_check == 1 && *ppid_check == 1 &&
616 *procname_check == 1)
617 return 0;
618
619 return -1;
620}
621
622/*
623 * check_requirements: check if the required context informations are available
624 *
625 * If each mandatory context information is available for at least in one
626 * event, return 0 otherwise return -1.
a54d0d2c
JD
627 */
628int check_requirements(struct bt_context *ctx)
629{
630 unsigned int i, evt_cnt, field_cnt;
631 struct bt_ctf_event_decl *const * evt_list;
632 const struct bt_ctf_field_decl *const * field_list;
633 int tid_check = 0;
634 int pid_check = 0;
635 int procname_check = 0;
636 int ppid_check = 0;
637 int ret = 0;
638
639 bt_ctf_get_event_decl_list(0, ctx, &evt_list, &evt_cnt);
640 for (i = 0; i < evt_cnt; i++) {
641 bt_ctf_get_decl_fields(evt_list[i], BT_STREAM_EVENT_CONTEXT,
642 &field_list, &field_cnt);
643 ret = check_field_requirements(field_list, field_cnt,
644 &tid_check, &pid_check, &procname_check,
645 &ppid_check);
a54d0d2c
JD
646
647 bt_ctf_get_decl_fields(evt_list[i], BT_EVENT_CONTEXT,
648 &field_list, &field_cnt);
649 ret = check_field_requirements(field_list, field_cnt,
650 &tid_check, &pid_check, &procname_check,
651 &ppid_check);
a54d0d2c
JD
652
653 bt_ctf_get_decl_fields(evt_list[i], BT_STREAM_PACKET_CONTEXT,
654 &field_list, &field_cnt);
655 ret = check_field_requirements(field_list, field_cnt,
656 &tid_check, &pid_check, &procname_check,
657 &ppid_check);
a54d0d2c
JD
658 }
659
660 if (tid_check == 0) {
661 ret = -1;
662 fprintf(stderr, "[error] missing tid context information\n");
663 }
664 if (pid_check == 0) {
665 ret = -1;
666 fprintf(stderr, "[error] missing pid context information\n");
667 }
668 if (ppid_check == 0) {
669 ret = -1;
670 fprintf(stderr, "[error] missing ppid context information\n");
671 }
672 if (procname_check == 0) {
673 ret = -1;
674 fprintf(stderr, "[error] missing procname context information\n");
675 }
676
a54d0d2c
JD
677 return ret;
678}
679
16b22a0f
JD
680ssize_t read_subbuffer(struct lttng_consumer_stream *kconsumerd_fd,
681 struct lttng_consumer_local_data *ctx)
682{
683 unsigned long len;
684 int err;
685 long ret = 0;
686 int infd = helper_get_lttng_consumer_stream_wait_fd(kconsumerd_fd);
687
688 if (helper_get_lttng_consumer_stream_output(kconsumerd_fd) == LTTNG_EVENT_SPLICE) {
689 /* Get the next subbuffer */
16b22a0f
JD
690 err = helper_kernctl_get_next_subbuf(infd);
691 if (err != 0) {
692 ret = errno;
693 perror("Reserving sub buffer failed (everything is normal, "
694 "it is due to concurrency)");
695 goto end;
696 }
697 /* read the whole subbuffer */
698 err = helper_kernctl_get_padded_subbuf_size(infd, &len);
699 if (err != 0) {
700 ret = errno;
701 perror("Getting sub-buffer len failed.");
702 goto end;
703 }
16b22a0f
JD
704
705 /* splice the subbuffer to the tracefile */
706 ret = helper_lttng_consumer_on_read_subbuffer_splice(ctx, kconsumerd_fd, len);
707 if (ret < 0) {
708 /*
709 * display the error but continue processing to try
710 * to release the subbuffer
711 */
712 fprintf(stderr,"Error splicing to tracefile\n");
713 }
16b22a0f
JD
714 err = helper_kernctl_put_next_subbuf(infd);
715 if (err != 0) {
716 ret = errno;
717 perror("Reserving sub buffer failed (everything is normal, "
718 "it is due to concurrency)");
719 goto end;
720 }
4e6aeb3d 721 sem_post(&metadata_available);
16b22a0f
JD
722 }
723
724end:
725 return 0;
726}
727
728int on_update_fd(int key, uint32_t state)
729{
730 /* let the lib handle the metadata FD */
731 if (key == sessiond_metadata)
732 return 0;
733 return 1;
734}
735
736int on_recv_fd(struct lttng_consumer_stream *kconsumerd_fd)
737{
738 int ret;
b520ab45 739 struct mmap_stream *new_mmap_stream;
16b22a0f 740
16b22a0f
JD
741 /* Opening the tracefile in write mode */
742 if (helper_get_lttng_consumer_stream_path_name(kconsumerd_fd) != NULL) {
743 ret = open(helper_get_lttng_consumer_stream_path_name(kconsumerd_fd),
744 O_WRONLY|O_CREAT|O_TRUNC, S_IRWXU|S_IRWXG|S_IRWXO);
745 if (ret < 0) {
746 perror("open");
747 goto end;
748 }
749 helper_set_lttng_consumer_stream_out_fd(kconsumerd_fd, ret);
750 }
751
752 if (helper_get_lttng_consumer_stream_output(kconsumerd_fd) == LTTNG_EVENT_MMAP) {
b520ab45
JD
753 new_mmap_stream = malloc(sizeof(struct mmap_stream));
754 new_mmap_stream->fd = helper_get_lttng_consumer_stream_wait_fd(
755 kconsumerd_fd);
756 bt_list_add(&new_mmap_stream->list, &mmap_list.head);
16b22a0f
JD
757
758 g_ptr_array_add(lttng_consumer_stream_array, kconsumerd_fd);
6112d0d4
JD
759 /* keep mmap FDs internally */
760 ret = 1;
16b22a0f
JD
761 } else {
762 consumerd_metadata = helper_get_lttng_consumer_stream_wait_fd(kconsumerd_fd);
763 sessiond_metadata = helper_get_lttng_consumer_stream_key(kconsumerd_fd);
764 ret = 0;
765 }
766
767end:
768 return ret;
769}
770
eb677852 771void live_consume(struct bt_context **bt_ctx)
e91044a8 772{
e91044a8
JD
773 int ret;
774
71c74ca6 775 if (!metadata_ready) {
71c74ca6 776 sem_wait(&metadata_available);
eb677852 777 if (access("/tmp/livesession/kernel/metadata", F_OK) != 0) {
b520ab45 778 fprintf(stderr,"no metadata\n");
eb677852 779 goto end;
c78f2cdc 780 }
71c74ca6 781 metadata_ready = 1;
eb677852 782 metadata_fp = fopen("/tmp/livesession/kernel/metadata", "r");
71c74ca6 783 }
c78f2cdc 784
71c74ca6 785 if (!trace_opened) {
eb677852
JD
786 *bt_ctx = bt_context_create();
787 ret = bt_context_add_trace(*bt_ctx, NULL, "ctf",
71c74ca6
JD
788 lttngtop_ctf_packet_seek, &mmap_list, metadata_fp);
789 if (ret < 0) {
790 printf("Error adding trace\n");
eb677852 791 goto end;
e91044a8 792 }
71c74ca6 793 trace_opened = 1;
e91044a8 794 }
b520ab45 795
eb677852
JD
796end:
797 return;
e91044a8 798}
16b22a0f
JD
799
800int setup_consumer(char *command_sock_path, pthread_t *threads,
801 struct lttng_consumer_local_data *ctx)
802{
803 int ret = 0;
804
805 ctx = helper_lttng_consumer_create(HELPER_LTTNG_CONSUMER_KERNEL,
806 read_subbuffer, NULL, on_recv_fd, on_update_fd);
807 if (!ctx)
808 goto end;
809
810 unlink(command_sock_path);
811 helper_lttng_consumer_set_command_sock_path(ctx, command_sock_path);
812 helper_lttng_consumer_init();
813
814 /* Create the thread to manage the receive of fd */
815 ret = pthread_create(&threads[0], NULL, helper_lttng_consumer_thread_receive_fds,
816 (void *) ctx);
817 if (ret != 0) {
c78f2cdc 818 perror("pthread_create receive fd");
16b22a0f
JD
819 goto end;
820 }
e91044a8
JD
821 /* Create thread to manage the polling/writing of traces */
822 ret = pthread_create(&threads[1], NULL, helper_lttng_consumer_thread_poll_fds,
823 (void *) ctx);
824 if (ret != 0) {
c78f2cdc 825 perror("pthread_create poll fd");
e91044a8
JD
826 goto end;
827 }
828
16b22a0f
JD
829end:
830 return ret;
831}
832
c78f2cdc 833void *setup_live_tracing()
16b22a0f
JD
834{
835 struct lttng_domain dom;
836 struct lttng_channel chan;
837 char *channel_name = "mmapchan";
16b22a0f
JD
838 struct lttng_event ev;
839 int ret = 0;
840 char *command_sock_path = "/tmp/consumerd_sock";
841 static pthread_t threads[2]; /* recv_fd, poll */
842 struct lttng_event_context kctxpid, kctxcomm, kctxppid, kctxtid;
16b22a0f
JD
843
844 struct lttng_handle *handle;
845
846 BT_INIT_LIST_HEAD(&mmap_list.head);
847
848 lttng_consumer_stream_array = g_ptr_array_new();
849
850 if ((ret = setup_consumer(command_sock_path, threads, ctx)) < 0) {
851 fprintf(stderr,"error setting up consumer\n");
852 goto end;
853 }
854
855 available_snapshots = g_ptr_array_new();
856
857 /* setup the session */
858 dom.type = LTTNG_DOMAIN_KERNEL;
859
eb677852 860 ret = unlink("/tmp/livesession");
16b22a0f 861
71c74ca6 862 lttng_destroy_session("test");
16b22a0f
JD
863 if ((ret = lttng_create_session("test", "/tmp/livesession")) < 0) {
864 fprintf(stderr,"error creating the session : %s\n",
865 helper_lttcomm_get_readable_code(ret));
866 goto end;
867 }
868
869 if ((handle = lttng_create_handle("test", &dom)) == NULL) {
870 fprintf(stderr,"error creating handle\n");
871 goto end;
872 }
873
874 if ((ret = lttng_register_consumer(handle, command_sock_path)) < 0) {
875 fprintf(stderr,"error registering consumer : %s\n",
876 helper_lttcomm_get_readable_code(ret));
877 goto end;
878 }
879
880 strcpy(chan.name, channel_name);
c78f2cdc 881 chan.attr.overwrite = 0;
6777529d
JD
882// chan.attr.subbuf_size = 32768;
883 chan.attr.subbuf_size = 1048576; /* 1MB */
16b22a0f
JD
884 chan.attr.num_subbuf = 4;
885 chan.attr.switch_timer_interval = 0;
886 chan.attr.read_timer_interval = 200;
887 chan.attr.output = LTTNG_EVENT_MMAP;
888
889 if ((ret = lttng_enable_channel(handle, &chan)) < 0) {
b872c906
JD
890 fprintf(stderr,"error creating channel : %s\n",
891 helper_lttcomm_get_readable_code(ret));
16b22a0f
JD
892 goto end;
893 }
894
b872c906
JD
895 memset(&ev, '\0', sizeof(struct lttng_event));
896 //sprintf(ev.name, "sched_switch");
16b22a0f 897 ev.type = LTTNG_EVENT_TRACEPOINT;
16b22a0f 898 if ((ret = lttng_enable_event(handle, &ev, channel_name)) < 0) {
b872c906
JD
899 fprintf(stderr,"error enabling event : %s\n",
900 helper_lttcomm_get_readable_code(ret));
16b22a0f
JD
901 goto end;
902 }
903
6777529d
JD
904 ev.type = LTTNG_EVENT_SYSCALL;
905 if ((ret = lttng_enable_event(handle, &ev, channel_name)) < 0) {
906 fprintf(stderr,"error enabling syscalls : %s\n",
907 helper_lttcomm_get_readable_code(ret));
908 goto end;
909 }
910
16b22a0f
JD
911 kctxpid.ctx = LTTNG_EVENT_CONTEXT_PID;
912 lttng_add_context(handle, &kctxpid, NULL, NULL);
913 kctxppid.ctx = LTTNG_EVENT_CONTEXT_PPID;
914 lttng_add_context(handle, &kctxppid, NULL, NULL);
915 kctxcomm.ctx = LTTNG_EVENT_CONTEXT_PROCNAME;
916 lttng_add_context(handle, &kctxcomm, NULL, NULL);
917 kctxtid.ctx = LTTNG_EVENT_CONTEXT_TID;
918 lttng_add_context(handle, &kctxtid, NULL, NULL);
919
920 if ((ret = lttng_start_tracing("test")) < 0) {
b872c906
JD
921 fprintf(stderr,"error starting tracing : %s\n",
922 helper_lttcomm_get_readable_code(ret));
16b22a0f
JD
923 goto end;
924 }
925
926 helper_kernctl_buffer_flush(consumerd_metadata);
e91044a8 927
16b22a0f 928 /* block until metadata is ready */
4e6aeb3d 929 sem_init(&metadata_available, 0, 0);
16b22a0f 930
16b22a0f 931end:
62e026c6 932 return NULL;
16b22a0f
JD
933}
934
1fc22eb4
JD
935int main(int argc, char **argv)
936{
937 int ret;
938 struct bt_context *bt_ctx = NULL;
939
940 ret = parse_options(argc, argv);
941 if (ret < 0) {
942 fprintf(stdout, "Error parsing options.\n\n");
943 usage(stdout);
944 exit(EXIT_FAILURE);
945 } else if (ret > 0) {
946 exit(EXIT_SUCCESS);
947 }
948
16b22a0f 949 if (!opt_input_path) {
6777529d
JD
950 setup_live_tracing();
951 init_lttngtop();
952 if (!opt_textdump) {
953 pthread_create(&display_thread, NULL, ncurses_display, (void *) NULL);
954 pthread_create(&timer_thread, NULL, refresh_thread, (void *) NULL);
955 }
eb677852
JD
956 live_consume(&bt_ctx);
957 iter_trace(bt_ctx);
958
959 quit = 1;
960 pthread_join(display_thread, NULL);
961 pthread_join(timer_thread, NULL);
6777529d 962
c78f2cdc 963 lttng_stop_tracing("test");
c78f2cdc
JD
964 lttng_destroy_session("test");
965
1fc22eb4 966 goto end;
16b22a0f
JD
967 } else {
968 init_lttngtop();
969
970 bt_ctx = bt_context_create();
971 ret = bt_context_add_traces_recursive(bt_ctx, opt_input_path, "ctf", NULL);
972 if (ret < 0) {
973 fprintf(stderr, "[error] Opening the trace\n");
974 goto end;
975 }
1fc22eb4 976
16b22a0f
JD
977 ret = check_requirements(bt_ctx);
978 if (ret < 0) {
979 fprintf(stderr, "[error] some mandatory contexts were missing, exiting.\n");
980 goto end;
981 }
982 pthread_create(&display_thread, NULL, ncurses_display, (void *) NULL);
983 pthread_create(&timer_thread, NULL, refresh_thread, (void *) NULL);
1fc22eb4 984
16b22a0f 985 iter_trace(bt_ctx);
1fc22eb4 986
16b22a0f
JD
987 quit = 1;
988 pthread_join(display_thread, NULL);
989 pthread_join(timer_thread, NULL);
990 }
1fc22eb4
JD
991
992end:
16b22a0f
JD
993 if (bt_ctx)
994 bt_context_put(bt_ctx);
995
1fc22eb4
JD
996 return 0;
997}
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