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[lttngtop.git] / src / lttngtop.c
1 /*
2 * Copyright (C) 2013 Julien Desfossez
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 *
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.
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>
25 #include <babeltrace/ctf/iterator.h>
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>
39 #include <assert.h>
40 #include <sys/mman.h>
41 #include <sys/wait.h>
42 #include <lttng/lttng.h>
43 #ifdef LTTNGTOP_MMAP_LIVE
44 #include <lttng/lttngtop-helper.h>
45 #include <babeltrace/lttngtopmmappacketseek.h>
46 #include "mmap-live.h"
47 #endif /* LTTNGTOP_MMAP_LIVE */
48
49 #include "lttngtoptypes.h"
50 #include "cputop.h"
51 #include "iostreamtop.h"
52 #include "cursesdisplay.h"
53 #include "common.h"
54 #include "network-live.h"
55
56 #define NET_URL_PREFIX "net://"
57 #define NET4_URL_PREFIX "net4://"
58 #define NET6_URL_PREFIX "net6://"
59
60 #define DEFAULT_FILE_ARRAY_SIZE 1
61
62 const char *opt_input_path;
63 int opt_textdump;
64 int opt_child;
65 int opt_begin;
66
67 int quit = 0;
68
69 struct lttngtop *copy;
70 pthread_t display_thread;
71 pthread_t timer_thread;
72
73 unsigned long refresh_display = 1 * NSEC_PER_SEC;
74 unsigned long last_display_update = 0;
75 unsigned long last_event_ts = 0;
76
77 /* list of FDs available for being read with snapshots */
78 struct bt_mmap_stream_list mmap_list;
79 GPtrArray *lttng_consumer_stream_array;
80 int sessiond_metadata, consumerd_metadata;
81 struct lttng_consumer_local_data *ctx = NULL;
82 /* list of snapshots currently not consumed */
83 GPtrArray *available_snapshots;
84 sem_t metadata_available;
85 int reload_trace = 0;
86
87 uint64_t prev_ts = 0;
88
89 enum {
90 OPT_NONE = 0,
91 OPT_HELP,
92 OPT_TEXTDUMP,
93 OPT_PID,
94 OPT_CHILD,
95 OPT_HOSTNAME,
96 OPT_RELAY_HOSTNAME,
97 OPT_KPROBES,
98 OPT_BEGIN,
99 };
100
101 static struct poptOption long_options[] = {
102 /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
103 { "help", 'h', POPT_ARG_NONE, NULL, OPT_HELP, NULL, NULL },
104 { "textdump", 't', POPT_ARG_NONE, NULL, OPT_TEXTDUMP, NULL, NULL },
105 { "child", 'f', POPT_ARG_NONE, NULL, OPT_CHILD, NULL, NULL },
106 { "begin", 'b', POPT_ARG_NONE, NULL, OPT_BEGIN, NULL, NULL },
107 { "pid", 'p', POPT_ARG_STRING, &opt_tid, OPT_PID, NULL, NULL },
108 { "hostname", 'n', POPT_ARG_STRING, &opt_hostname, OPT_HOSTNAME, NULL, NULL },
109 { "relay-hostname", 'r', POPT_ARG_STRING, &opt_relay_hostname,
110 OPT_RELAY_HOSTNAME, NULL, NULL },
111 { "kprobes", 'k', POPT_ARG_STRING, &opt_kprobes, OPT_KPROBES, NULL, NULL },
112 { NULL, 0, 0, NULL, 0, NULL, NULL },
113 };
114
115 #ifdef LTTNGTOP_MMAP_LIVE
116 static void handle_textdump_sigterm(int signal)
117 {
118 quit = 1;
119 lttng_destroy_session("test");
120 }
121 #endif
122
123 void *refresh_thread(void *p)
124 {
125 while (1) {
126 if (quit) {
127 sem_post(&pause_sem);
128 sem_post(&timer);
129 sem_post(&end_trace_sem);
130 sem_post(&goodtodisplay);
131 sem_post(&goodtoupdate);
132 pthread_exit(0);
133 }
134 if (!opt_input_path) {
135 #ifdef LTTNGTOP_MMAP_LIVE
136 mmap_live_flush(mmap_list);
137 #endif
138 }
139 sem_wait(&pause_sem);
140 sem_post(&pause_sem);
141 sem_post(&timer);
142 sleep(refresh_display/NSEC_PER_SEC);
143 }
144 }
145
146 void *ncurses_display(void *p)
147 {
148 unsigned int current_display_index = 0;
149
150 sem_wait(&bootstrap);
151 /*
152 * Prevent the 1 second delay when we hit ESC
153 */
154 ESCDELAY = 0;
155 init_ncurses();
156
157 while (1) {
158 sem_wait(&timer);
159 sem_wait(&goodtodisplay);
160 sem_wait(&pause_sem);
161
162 if (quit) {
163 sem_post(&pause_sem);
164 sem_post(&timer);
165 reset_ncurses();
166 pthread_exit(0);
167 }
168
169 copy = g_ptr_array_index(copies, current_display_index);
170 assert(copy);
171 display(current_display_index++);
172
173 sem_post(&goodtoupdate);
174 sem_post(&pause_sem);
175 }
176 }
177
178 void print_fields(struct bt_ctf_event *event)
179 {
180 unsigned int cnt, i;
181 const struct bt_definition *const * list;
182 const struct bt_declaration *l;
183 const struct bt_definition *scope;
184 enum ctf_type_id type;
185 const char *str;
186
187 scope = bt_ctf_get_top_level_scope(event, BT_EVENT_FIELDS);
188
189 bt_ctf_get_field_list(event, scope, &list, &cnt);
190 for (i = 0; i < cnt; i++) {
191 if (i != 0)
192 printf(", ");
193 printf("%s = ", bt_ctf_field_name(list[i]));
194 l = bt_ctf_get_decl_from_def(list[i]);
195 type = bt_ctf_field_type(l);
196 if (type == CTF_TYPE_INTEGER) {
197 if (bt_ctf_get_int_signedness(l) == 0)
198 printf("%" PRIu64 "", bt_ctf_get_uint64(list[i]));
199 else
200 printf("%" PRId64 "", bt_ctf_get_int64(list[i]));
201 } else if (type == CTF_TYPE_STRING) {
202 printf("%s", bt_ctf_get_string(list[i]));
203 } else if (type == CTF_TYPE_ARRAY) {
204 str = bt_ctf_get_char_array(list[i]);
205 if (!bt_ctf_field_get_error() && str)
206 printf("%s", str);
207 }
208 }
209 }
210
211 /*
212 * hook on each event to check the timestamp and refresh the display if
213 * necessary
214 */
215 enum bt_cb_ret print_timestamp(struct bt_ctf_event *call_data, void *private_data)
216 {
217 unsigned long timestamp;
218 uint64_t delta;
219 struct tm start;
220 uint64_t ts_nsec_start;
221 int pid, cpu_id, tid, ret, lookup;
222 const struct bt_definition *scope;
223 const char *hostname, *procname;
224 struct cputime *cpu;
225 char *from_syscall = NULL;
226
227 timestamp = bt_ctf_get_timestamp(call_data);
228
229 /* can happen in network live when tracing is idle */
230 if (timestamp < last_event_ts)
231 goto end_stop;
232
233 last_event_ts = timestamp;
234
235 start = format_timestamp(timestamp);
236 ts_nsec_start = timestamp % NSEC_PER_SEC;
237
238 pid = get_context_pid(call_data);
239 if (pid == -1ULL && opt_tid) {
240 goto error;
241 }
242
243 tid = get_context_tid(call_data);
244
245 hostname = get_context_hostname(call_data);
246 if (opt_child)
247 lookup = pid;
248 else
249 lookup = tid;
250 if (opt_tid || opt_hostname || opt_exec_name) {
251 if (!lookup_filter_tid_list(lookup)) {
252 /* To display when a process of ours in getting scheduled in */
253 if (strcmp(bt_ctf_event_name(call_data), "sched_switch") == 0) {
254 int next_tid;
255
256 scope = bt_ctf_get_top_level_scope(call_data,
257 BT_EVENT_FIELDS);
258 next_tid = bt_ctf_get_int64(bt_ctf_get_field(call_data,
259 scope, "_next_tid"));
260 if (bt_ctf_field_get_error()) {
261 fprintf(stderr, "Missing next_tid field\n");
262 goto error;
263 }
264 if (!lookup_filter_tid_list(next_tid)) {
265 goto end;
266 }
267 } else {
268 goto end;
269 }
270 }
271 }
272
273 cpu_id = get_cpu_id(call_data);
274 procname = get_context_comm(call_data);
275 if (strncmp(bt_ctf_event_name(call_data), "sys_", 4) == 0) {
276 cpu = get_cpu(cpu_id);
277 cpu->current_syscall = g_new0(struct syscall, 1);
278 cpu->current_syscall->name = strdup(bt_ctf_event_name(call_data));
279 cpu->current_syscall->ts_start = timestamp;
280 } else if ((strncmp(bt_ctf_event_name(call_data), "exit_syscall", 12)) == 0) {
281 struct tm start_ts;
282
283 cpu = get_cpu(cpu_id);
284 if (cpu->current_syscall) {
285 delta = timestamp - cpu->current_syscall->ts_start;
286 start_ts = format_timestamp(cpu->current_syscall->ts_start);
287 ret = asprintf(&from_syscall, " [from %02d:%02d:%02d.%09" PRIu64
288 " (+%" PRIu64 ".%09" PRIu64 ") (cpu %d) %s]\n",
289 start_ts.tm_hour, start_ts.tm_min, start_ts.tm_sec,
290 cpu->current_syscall->ts_start % NSEC_PER_SEC,
291 delta / NSEC_PER_SEC, delta % NSEC_PER_SEC,
292 cpu_id, cpu->current_syscall->name);
293 if (ret < 0) {
294 goto error;
295 }
296 free(cpu->current_syscall->name);
297 g_free(cpu->current_syscall);
298 cpu->current_syscall = NULL;
299 }
300 }
301
302 if (prev_ts == 0)
303 prev_ts = timestamp;
304 delta = timestamp - prev_ts;
305 prev_ts = timestamp;
306
307 printf("%02d:%02d:%02d.%09" PRIu64 " (+%" PRIu64 ".%09" PRIu64 ") %s%s"
308 "(cpu %d) [%s (%d/%d)] %s (",
309 start.tm_hour, start.tm_min, start.tm_sec,
310 ts_nsec_start, delta / NSEC_PER_SEC,
311 delta % NSEC_PER_SEC, (hostname) ? hostname : "",
312 (hostname) ? " ": "", cpu_id, procname, pid, tid,
313 bt_ctf_event_name(call_data));
314 print_fields(call_data);
315 printf(")%s", (from_syscall) ? from_syscall : "\n");
316
317 free(from_syscall);
318
319 end:
320 return BT_CB_OK;
321 error:
322 return BT_CB_ERROR_STOP;
323 end_stop:
324 return BT_CB_OK_STOP;
325 }
326
327 enum bt_cb_ret handle_kprobes(struct bt_ctf_event *call_data, void *private_data)
328 {
329 int i;
330 struct kprobes *kprobe;
331
332 /* for kprobes */
333 for (i = 0; i < lttngtop.kprobes_table->len; i++) {
334 kprobe = g_ptr_array_index(lttngtop.kprobes_table, i);
335 if (strcmp(bt_ctf_event_name(call_data), kprobe->probe_name) == 0) {
336 kprobe->count++;
337 }
338 }
339
340 return BT_CB_OK;
341 }
342
343 /*
344 * hook on each event to check the timestamp and refresh the display if
345 * necessary
346 */
347 enum bt_cb_ret check_timestamp(struct bt_ctf_event *call_data, void *private_data)
348 {
349 unsigned long timestamp;
350
351 timestamp = bt_ctf_get_timestamp(call_data);
352 if (timestamp == -1ULL)
353 goto error;
354
355 /* can happen in network live when tracing is idle */
356 if (timestamp < last_event_ts)
357 goto end_stop;
358
359 last_event_ts = timestamp;
360
361 if (last_display_update == 0)
362 last_display_update = timestamp;
363
364 if (timestamp - last_display_update >= refresh_display) {
365 sem_wait(&goodtoupdate);
366 g_ptr_array_add(copies, get_copy_lttngtop(last_display_update,
367 timestamp));
368 sem_post(&goodtodisplay);
369 sem_post(&bootstrap);
370 last_display_update = timestamp;
371 }
372 return BT_CB_OK;
373
374 error:
375 fprintf(stderr, "check_timestamp callback error\n");
376 return BT_CB_ERROR_STOP;
377
378 end_stop:
379 return BT_CB_OK_STOP;
380 }
381
382 /*
383 * get_perf_counter : get or create and return a perf_counter struct for
384 * either a process or a cpu (only one of the 2 parameters mandatory)
385 */
386 struct perfcounter *get_perf_counter(const char *name, struct processtop *proc,
387 struct cputime *cpu)
388 {
389 struct perfcounter *ret;
390 GHashTable *table;
391
392 if (proc)
393 table = proc->perf;
394 else if (cpu)
395 table = cpu->perf;
396 else
397 goto error;
398
399 ret = g_hash_table_lookup(table, (gpointer) name);
400 if (ret)
401 goto end;
402
403 ret = g_new0(struct perfcounter, 1);
404 /* by default, make it visible in the UI */
405 ret->visible = 1;
406 g_hash_table_insert(table, (gpointer) strdup(name), ret);
407
408 end:
409 return ret;
410
411 error:
412 return NULL;
413 }
414
415 void update_perf_value(struct processtop *proc, struct cputime *cpu,
416 const char *name, int value)
417 {
418 struct perfcounter *cpu_perf, *process_perf;
419
420 cpu_perf = get_perf_counter(name, NULL, cpu);
421 if (cpu_perf->count < value) {
422 process_perf = get_perf_counter(name, proc, NULL);
423 process_perf->count += value - cpu_perf->count;
424 cpu_perf->count = value;
425 }
426 }
427
428 void extract_perf_counter_scope(const struct bt_ctf_event *event,
429 const struct bt_definition *scope,
430 struct processtop *proc,
431 struct cputime *cpu)
432 {
433 struct bt_definition const * const *list = NULL;
434 const struct bt_definition *field;
435 unsigned int count;
436 struct perfcounter *perfcounter;
437 GHashTableIter iter;
438 gpointer key;
439 int ret;
440
441 if (!scope)
442 goto end;
443
444 ret = bt_ctf_get_field_list(event, scope, &list, &count);
445 if (ret < 0)
446 goto end;
447
448 if (count == 0)
449 goto end;
450
451 g_hash_table_iter_init(&iter, global_perf_liszt);
452 while (g_hash_table_iter_next (&iter, &key, (gpointer) &perfcounter)) {
453 field = bt_ctf_get_field(event, scope, (char *) key);
454 if (field) {
455 int value = bt_ctf_get_uint64(field);
456 if (bt_ctf_field_get_error())
457 continue;
458 update_perf_value(proc, cpu, (char *) key, value);
459 }
460 }
461
462 end:
463 return;
464 }
465
466 void update_perf_counter(struct processtop *proc, const struct bt_ctf_event *event)
467 {
468 struct cputime *cpu;
469 const struct bt_definition *scope;
470
471 cpu = get_cpu(get_cpu_id(event));
472
473 scope = bt_ctf_get_top_level_scope(event, BT_STREAM_EVENT_CONTEXT);
474 extract_perf_counter_scope(event, scope, proc, cpu);
475
476 scope = bt_ctf_get_top_level_scope(event, BT_STREAM_PACKET_CONTEXT);
477 extract_perf_counter_scope(event, scope, proc, cpu);
478
479 scope = bt_ctf_get_top_level_scope(event, BT_EVENT_CONTEXT);
480 extract_perf_counter_scope(event, scope, proc, cpu);
481 }
482
483 enum bt_cb_ret fix_process_table(struct bt_ctf_event *call_data,
484 void *private_data)
485 {
486 int pid, tid, ppid, vpid, vtid, vppid;
487 char *comm, *hostname;
488 struct processtop *parent, *child;
489 unsigned long timestamp;
490
491 timestamp = bt_ctf_get_timestamp(call_data);
492 if (timestamp == -1ULL)
493 goto error;
494
495 pid = get_context_pid(call_data);
496 if (pid == -1ULL) {
497 goto error;
498 }
499
500 tid = get_context_tid(call_data);
501 if (tid == -1ULL) {
502 goto error;
503 }
504 ppid = get_context_ppid(call_data);
505 if (ppid == -1ULL) {
506 goto error;
507 }
508 vpid = get_context_vpid(call_data);
509 if (pid == -1ULL) {
510 vpid = -1;
511 }
512 vtid = get_context_vtid(call_data);
513 if (tid == -1ULL) {
514 vtid = -1;
515 }
516 vppid = get_context_vppid(call_data);
517 if (ppid == -1ULL) {
518 vppid = -1;
519 }
520 comm = get_context_comm(call_data);
521 if (!comm) {
522 goto error;
523 }
524 /* optional */
525 hostname = get_context_hostname(call_data);
526
527 /* find or create the current process */
528 child = find_process_tid(&lttngtop, tid, comm);
529 if (!child)
530 child = add_proc(&lttngtop, tid, comm, timestamp, hostname);
531 if (!child)
532 goto end;
533 update_proc(child, pid, tid, ppid, vpid, vtid, vppid, comm, hostname);
534
535 if (pid != tid) {
536 /* find or create the parent */
537 parent = find_process_tid(&lttngtop, pid, comm);
538 if (!parent) {
539 parent = add_proc(&lttngtop, pid, comm, timestamp, hostname);
540 if (parent)
541 parent->pid = pid;
542 }
543
544 /* attach the parent to the current process */
545 child->threadparent = parent;
546 add_thread(parent, child);
547 }
548
549 update_perf_counter(child, call_data);
550
551 end:
552 return BT_CB_OK;
553
554 error:
555 return BT_CB_ERROR_STOP;
556 }
557
558 void init_lttngtop()
559 {
560 copies = g_ptr_array_new();
561 global_perf_liszt = g_hash_table_new(g_str_hash, g_str_equal);
562 global_filter_list = g_hash_table_new(g_str_hash, g_str_equal);
563 global_host_list = g_hash_table_new(g_str_hash, g_str_equal);
564 tid_filter_list = g_hash_table_new(g_str_hash,
565 g_str_equal);
566
567 sem_init(&goodtodisplay, 0, 0);
568 sem_init(&goodtoupdate, 0, 1);
569 sem_init(&timer, 0, 1);
570 sem_init(&bootstrap, 0, 0);
571 sem_init(&pause_sem, 0, 1);
572 sem_init(&end_trace_sem, 0, 0);
573
574 reset_global_counters();
575 lttngtop.nbproc = 0;
576 lttngtop.nbthreads = 0;
577 lttngtop.nbfiles = 0;
578
579 lttngtop.process_hash_table = g_hash_table_new(g_direct_hash,
580 g_direct_equal);
581 lttngtop.process_table = g_ptr_array_new();
582 lttngtop.files_table = g_ptr_array_new();
583 lttngtop.cpu_table = g_ptr_array_new();
584
585 toggle_filter = -1;
586 }
587
588 void usage(FILE *fp)
589 {
590 fprintf(fp, "LTTngTop %s\n\n", VERSION);
591 fprintf(fp, "Usage : lttngtop [OPTIONS] TRACE\n");
592 fprintf(fp, " TRACE Path to the trace to analyse (-r for network live tracing, nothing for mmap live streaming)\n");
593 fprintf(fp, " -h, --help This help message\n");
594 fprintf(fp, " -t, --textdump Display live events in text-only\n");
595 fprintf(fp, " -p, --pid Comma-separated list of PIDs to display\n");
596 fprintf(fp, " -f, --child Follow threads associated with selected PIDs\n");
597 fprintf(fp, " -n, --hostname Comma-separated list of hostnames to display (require hostname context in trace)\n");
598 fprintf(fp, " -k, --kprobes Comma-separated list of kprobes to insert (same format as lttng enable-event)\n");
599 fprintf(fp, " -r, --relay-hostname Network live streaming : hostname of the lttng-relayd (default port)\n");
600 fprintf(fp, " -b, --begin Network live streaming : read the trace for the beginning of the recording\n");
601 }
602
603 /*
604 * Parse probe options.
605 * Shamelessly stolen from lttng-tools :
606 * src/bin/lttng/commands/enable_events.c
607 */
608 static struct kprobes *parse_probe_opts(char *opt)
609 {
610 char s_hex[19];
611 char name[LTTNG_SYMBOL_NAME_LEN];
612 struct kprobes *kprobe;
613 int ret;
614
615 /*
616 kprobe->probe_addr = 0;
617 kprobe->probe_offset = 0;
618 asprintf(&kprobe->probe_name, "probe_sys_open");
619 asprintf(&kprobe->symbol_name, "sys_open");
620 */
621
622 if (opt == NULL) {
623 kprobe = NULL;
624 goto end;
625 }
626
627 kprobe = g_new0(struct kprobes, 1);
628
629 /* Check for symbol+offset */
630 ret = sscanf(opt, "%[^'+']+%s", name, s_hex);
631 if (ret == 2) {
632 ret = asprintf(&kprobe->probe_name, "probe_%s", name);
633 ret = asprintf(&kprobe->symbol_name, "%s", name);
634
635 if (strlen(s_hex) == 0) {
636 fprintf(stderr, "Invalid probe offset %s", s_hex);
637 ret = -1;
638 goto end;
639 }
640 kprobe->probe_offset = strtoul(s_hex, NULL, 0);
641 kprobe->probe_addr = 0;
642 goto end;
643 }
644
645 /* Check for symbol */
646 if (isalpha(name[0])) {
647 ret = sscanf(opt, "%s", name);
648 if (ret == 1) {
649 ret = asprintf(&kprobe->probe_name, "probe_%s", name);
650 ret = asprintf(&kprobe->symbol_name, "%s", name);
651 kprobe->probe_offset = 0;
652 kprobe->probe_addr = 0;
653 goto end;
654 }
655 }
656
657 /* Check for address */
658 ret = sscanf(opt, "%s", s_hex);
659 if (ret > 0) {
660 if (strlen(s_hex) == 0) {
661 fprintf(stderr, "Invalid probe address %s", s_hex);
662 ret = -1;
663 goto end;
664 }
665 ret = asprintf(&kprobe->probe_name, "probe_%s", s_hex);
666 kprobe->probe_offset = 0;
667 kprobe->probe_addr = strtoul(s_hex, NULL, 0);
668 goto end;
669 }
670
671 /* No match */
672 kprobe = NULL;
673
674 end:
675 return kprobe;
676 }
677
678 /*
679 * Return 0 if caller should continue, < 0 if caller should return
680 * error, > 0 if caller should exit without reporting error.
681 */
682 static int parse_options(int argc, char **argv)
683 {
684 poptContext pc;
685 int opt, ret = 0;
686 char *tmp_str;
687 int *tid;
688 int i;
689
690 remote_live = 0;
691
692 pc = poptGetContext(NULL, argc, (const char **) argv, long_options, 0);
693 poptReadDefaultConfig(pc, 0);
694
695 while ((opt = poptGetNextOpt(pc)) != -1) {
696 switch (opt) {
697 case OPT_HELP:
698 usage(stdout);
699 ret = 1; /* exit cleanly */
700 goto end;
701 case OPT_TEXTDUMP:
702 opt_textdump = 1;
703 break;
704 case OPT_CHILD:
705 opt_child = 1;
706 break;
707 case OPT_PID:
708 toggle_filter = 1;
709 tmp_str = strtok(opt_tid, ",");
710 while (tmp_str) {
711 tid = malloc(sizeof(int));
712 *tid = atoi(tmp_str);
713 g_hash_table_insert(tid_filter_list,
714 (gpointer) tid, tid);
715 tmp_str = strtok(NULL, ",");
716 }
717 break;
718 case OPT_BEGIN:
719 /* start reading the live trace from the beginning */
720 opt_begin = 1;
721 break;
722 case OPT_HOSTNAME:
723 toggle_filter = 1;
724 tmp_str = strtok(opt_hostname, ",");
725 while (tmp_str) {
726 add_hostname_list(tmp_str, 1);
727 tmp_str = strtok(NULL, ",");
728 }
729 break;
730 case OPT_RELAY_HOSTNAME:
731 remote_live = 1;
732 break;
733 case OPT_KPROBES:
734 lttngtop.kprobes_table = g_ptr_array_new();
735 tmp_str = strtok(opt_kprobes, ",");
736 while (tmp_str) {
737 struct kprobes *kprobe;
738
739 kprobe = parse_probe_opts(tmp_str);
740 if (kprobe) {
741 g_ptr_array_add(
742 lttngtop.kprobes_table,
743 kprobe);
744 } else {
745 ret = -EINVAL;
746 goto end;
747 }
748 tmp_str = strtok(NULL, ",");
749 }
750 break;
751 default:
752 ret = -EINVAL;
753 goto end;
754 }
755 }
756
757 opt_exec_name = NULL;
758 opt_exec_argv = NULL;
759 for (i = 0; i < argc; i++) {
760 if (argv[i][0] == '-' && argv[i][1] == '-') {
761 opt_exec_name = argv[i + 1];
762 opt_exec_argv = &argv[i + 1];
763 break;
764 }
765 }
766 if (!opt_exec_name) {
767 opt_input_path = poptGetArg(pc);
768 }
769
770 end:
771 if (pc) {
772 poptFreeContext(pc);
773 }
774 return ret;
775 }
776
777 void iter_trace(struct bt_context *bt_ctx)
778 {
779 struct bt_ctf_iter *iter;
780 struct bt_iter_pos begin_pos;
781 struct kprobes *kprobe;
782 const struct bt_ctf_event *event;
783 int i;
784 int ret = 0;
785
786 begin_pos.type = BT_SEEK_BEGIN;
787 iter = bt_ctf_iter_create(bt_ctx, &begin_pos, NULL);
788
789 /* at each event, verify the status of the process table */
790 bt_ctf_iter_add_callback(iter, 0, NULL, 0,
791 fix_process_table,
792 NULL, NULL, NULL);
793 /* to handle the follow child option */
794 bt_ctf_iter_add_callback(iter,
795 g_quark_from_static_string("sched_process_fork"),
796 NULL, 0, handle_sched_process_fork, NULL, NULL, NULL);
797 /* to clean up the process table */
798 bt_ctf_iter_add_callback(iter,
799 g_quark_from_static_string("sched_process_free"),
800 NULL, 0, handle_sched_process_free, NULL, NULL, NULL);
801 if (opt_textdump) {
802 bt_ctf_iter_add_callback(iter, 0, NULL, 0,
803 print_timestamp,
804 NULL, NULL, NULL);
805 } else {
806 /* at each event check if we need to refresh */
807 bt_ctf_iter_add_callback(iter, 0, NULL, 0,
808 check_timestamp,
809 NULL, NULL, NULL);
810 /* to handle the scheduling events */
811 bt_ctf_iter_add_callback(iter,
812 g_quark_from_static_string("sched_switch"),
813 NULL, 0, handle_sched_switch, NULL, NULL, NULL);
814 /* to get all the process from the statedumps */
815 bt_ctf_iter_add_callback(iter,
816 g_quark_from_static_string(
817 "lttng_statedump_process_state"),
818 NULL, 0, handle_statedump_process_state,
819 NULL, NULL, NULL);
820
821 /* for IO top */
822 bt_ctf_iter_add_callback(iter,
823 g_quark_from_static_string("exit_syscall"),
824 NULL, 0, handle_exit_syscall, NULL, NULL, NULL);
825 bt_ctf_iter_add_callback(iter,
826 g_quark_from_static_string("sys_write"),
827 NULL, 0, handle_sys_write, NULL, NULL, NULL);
828 bt_ctf_iter_add_callback(iter,
829 g_quark_from_static_string("sys_read"),
830 NULL, 0, handle_sys_read, NULL, NULL, NULL);
831 bt_ctf_iter_add_callback(iter,
832 g_quark_from_static_string("sys_open"),
833 NULL, 0, handle_sys_open, NULL, NULL, NULL);
834 bt_ctf_iter_add_callback(iter,
835 g_quark_from_static_string("sys_close"),
836 NULL, 0, handle_sys_close, NULL, NULL, NULL);
837 bt_ctf_iter_add_callback(iter,
838 g_quark_from_static_string(
839 "lttng_statedump_file_descriptor"),
840 NULL, 0, handle_statedump_file_descriptor,
841 NULL, NULL, NULL);
842
843 /* for kprobes */
844 if (lttngtop.kprobes_table) {
845 for (i = 0; i < lttngtop.kprobes_table->len; i++) {
846 kprobe = g_ptr_array_index(lttngtop.kprobes_table, i);
847 bt_ctf_iter_add_callback(iter,
848 g_quark_from_static_string(
849 kprobe->probe_name),
850 NULL, 0, handle_kprobes,
851 NULL, NULL, NULL);
852 }
853 }
854 }
855
856 if (opt_exec_name) {
857 pid_t pid;
858
859 pid = fork();
860 if (pid == 0) {
861 execvpe(opt_exec_name, opt_exec_argv, opt_exec_env);
862 exit(EXIT_SUCCESS);
863 } else if (pid > 0) {
864 opt_exec_pid = pid;
865 g_hash_table_insert(tid_filter_list,
866 (gpointer) &pid,
867 &pid);
868 } else {
869 perror("fork");
870 exit(EXIT_FAILURE);
871 }
872 }
873
874 while ((event = bt_ctf_iter_read_event(iter)) != NULL) {
875 if (quit || reload_trace)
876 goto end_iter;
877 ret = bt_iter_next(bt_ctf_get_iter(iter));
878 if (ret < 0)
879 goto end_iter;
880 }
881
882 /* block until quit, we reached the end of the trace */
883 sem_wait(&end_trace_sem);
884
885 end_iter:
886 bt_ctf_iter_destroy(iter);
887 }
888
889 /*
890 * bt_context_add_traces_recursive: Open a trace recursively
891 * (copied from BSD code in converter/babeltrace.c)
892 *
893 * Find each trace present in the subdirectory starting from the given
894 * path, and add them to the context. The packet_seek parameter can be
895 * NULL: this specify to use the default format packet_seek.
896 *
897 * Return: 0 on success, nonzero on failure.
898 * Unable to open toplevel: failure.
899 * Unable to open some subdirectory or file: warn and continue;
900 */
901 int bt_context_add_traces_recursive(struct bt_context *ctx, const char *path,
902 const char *format_str,
903 void (*packet_seek)(struct bt_stream_pos *pos,
904 size_t offset, int whence))
905 {
906 FTS *tree;
907 FTSENT *node;
908 GArray *trace_ids;
909 char lpath[PATH_MAX];
910 char * const paths[2] = { lpath, NULL };
911 int ret = -1;
912
913 if ((strncmp(path, NET4_URL_PREFIX, sizeof(NET4_URL_PREFIX) - 1)) == 0 ||
914 (strncmp(path, NET6_URL_PREFIX, sizeof(NET6_URL_PREFIX) - 1)) == 0 ||
915 (strncmp(path, NET_URL_PREFIX, sizeof(NET_URL_PREFIX) - 1)) == 0) {
916 ret = bt_context_add_trace(ctx,
917 path, format_str, packet_seek, NULL, NULL);
918 if (ret < 0) {
919 fprintf(stderr, "[warning] [Context] cannot open trace \"%s\" "
920 "for reading.\n", path);
921 /* Allow to skip erroneous traces. */
922 ret = 1; /* partial error */
923 }
924 return ret;
925 }
926 /*
927 * Need to copy path, because fts_open can change it.
928 * It is the pointer array, not the strings, that are constant.
929 */
930 strncpy(lpath, path, PATH_MAX);
931 lpath[PATH_MAX - 1] = '\0';
932
933 tree = fts_open(paths, FTS_NOCHDIR | FTS_LOGICAL, 0);
934 if (tree == NULL) {
935 fprintf(stderr, "[error] [Context] Cannot traverse \"%s\" for reading.\n",
936 path);
937 return -EINVAL;
938 }
939
940 trace_ids = g_array_new(FALSE, TRUE, sizeof(int));
941
942 while ((node = fts_read(tree))) {
943 int dirfd, metafd;
944
945 if (!(node->fts_info & FTS_D))
946 continue;
947
948 dirfd = open(node->fts_accpath, 0);
949 if (dirfd < 0) {
950 fprintf(stderr, "[error] [Context] Unable to open trace "
951 "directory file descriptor.\n");
952 ret = dirfd;
953 goto error;
954 }
955 metafd = openat(dirfd, "metadata", O_RDONLY);
956 if (metafd < 0) {
957 close(dirfd);
958 continue;
959 } else {
960 int trace_id;
961
962 ret = close(metafd);
963 if (ret < 0) {
964 perror("close");
965 goto error;
966 }
967 ret = close(dirfd);
968 if (ret < 0) {
969 perror("close");
970 goto error;
971 }
972
973 trace_id = bt_context_add_trace(ctx,
974 node->fts_accpath, format_str,
975 packet_seek, NULL, NULL);
976 if (trace_id < 0) {
977 fprintf(stderr, "[warning] [Context] opening trace \"%s\" from %s "
978 "for reading.\n", node->fts_accpath, path);
979 /* Allow to skip erroneous traces. */
980 continue;
981 }
982 g_array_append_val(trace_ids, trace_id);
983 }
984 }
985
986 g_array_free(trace_ids, TRUE);
987 return ret;
988
989 error:
990 return ret;
991 }
992
993 static int check_field_requirements(const struct bt_ctf_field_decl *const * field_list,
994 int field_cnt, int *tid_check, int *pid_check,
995 int *procname_check, int *ppid_check)
996 {
997 int j;
998 struct perfcounter *global;
999 const char *name;
1000
1001 for (j = 0; j < field_cnt; j++) {
1002 name = bt_ctf_get_decl_field_name(field_list[j]);
1003 if (*tid_check == 0) {
1004 if (strncmp(name, "tid", 3) == 0)
1005 (*tid_check)++;
1006 }
1007 if (*pid_check == 0) {
1008 if (strncmp(name, "pid", 3) == 0)
1009 (*pid_check)++;
1010 }
1011 if (*ppid_check == 0) {
1012 if (strncmp(name, "ppid", 4) == 0)
1013 (*ppid_check)++;
1014 }
1015 if (*procname_check == 0) {
1016 if (strncmp(name, "procname", 8) == 0)
1017 (*procname_check)++;
1018 }
1019 if (strncmp(name, "perf_", 5) == 0) {
1020 global = g_hash_table_lookup(global_perf_liszt, (gpointer) name);
1021 if (!global) {
1022 global = g_new0(struct perfcounter, 1);
1023 /* by default, sort on the first perf context */
1024 if (g_hash_table_size(global_perf_liszt) == 0)
1025 global->sort = 1;
1026 global->visible = 1;
1027 g_hash_table_insert(global_perf_liszt, (gpointer) strdup(name), global);
1028 }
1029 }
1030 }
1031
1032 if (*tid_check == 1 && *pid_check == 1 && *ppid_check == 1 &&
1033 *procname_check == 1)
1034 return 0;
1035
1036 return -1;
1037 }
1038
1039 /*
1040 * check_requirements: check if the required context informations are available
1041 *
1042 * If each mandatory context information is available for at least in one
1043 * event, return 0 otherwise return -1.
1044 */
1045 int check_requirements(struct bt_context *ctx)
1046 {
1047 unsigned int i, evt_cnt, field_cnt;
1048 struct bt_ctf_event_decl *const * evt_list;
1049 const struct bt_ctf_field_decl *const * field_list;
1050 int tid_check = 0;
1051 int pid_check = 0;
1052 int procname_check = 0;
1053 int ppid_check = 0;
1054 int ret = 0;
1055
1056 ret = bt_ctf_get_event_decl_list(0, ctx, &evt_list, &evt_cnt);
1057 if (ret < 0) {
1058 goto end;
1059 }
1060
1061 for (i = 0; i < evt_cnt; i++) {
1062 bt_ctf_get_decl_fields(evt_list[i], BT_STREAM_EVENT_CONTEXT,
1063 &field_list, &field_cnt);
1064 ret = check_field_requirements(field_list, field_cnt,
1065 &tid_check, &pid_check, &procname_check,
1066 &ppid_check);
1067
1068 bt_ctf_get_decl_fields(evt_list[i], BT_EVENT_CONTEXT,
1069 &field_list, &field_cnt);
1070 ret = check_field_requirements(field_list, field_cnt,
1071 &tid_check, &pid_check, &procname_check,
1072 &ppid_check);
1073
1074 bt_ctf_get_decl_fields(evt_list[i], BT_STREAM_PACKET_CONTEXT,
1075 &field_list, &field_cnt);
1076 ret = check_field_requirements(field_list, field_cnt,
1077 &tid_check, &pid_check, &procname_check,
1078 &ppid_check);
1079 }
1080
1081 if (tid_check == 0) {
1082 ret = -1;
1083 fprintf(stderr, "[error] missing tid context information\n");
1084 }
1085 if (pid_check == 0) {
1086 ret = -1;
1087 fprintf(stderr, "[error] missing pid context information\n");
1088 }
1089 if (ppid_check == 0) {
1090 ret = -1;
1091 fprintf(stderr, "[error] missing ppid context information\n");
1092 }
1093 if (procname_check == 0) {
1094 ret = -1;
1095 fprintf(stderr, "[error] missing procname context information\n");
1096 }
1097
1098 end:
1099 return ret;
1100 }
1101
1102 static void handle_sigchild(int signal)
1103 {
1104 int status;
1105
1106 waitpid(opt_exec_pid, &status, 0);
1107 }
1108
1109 int main(int argc, char **argv, char **envp)
1110 {
1111 int ret;
1112 struct bt_context *bt_ctx = NULL;
1113
1114 //babeltrace_verbose = 1;
1115 init_lttngtop();
1116 ret = parse_options(argc, argv);
1117 if (ret < 0) {
1118 fprintf(stdout, "Error parsing options.\n\n");
1119 usage(stdout);
1120 exit(EXIT_FAILURE);
1121 } else if (ret > 0) {
1122 exit(EXIT_SUCCESS);
1123 }
1124
1125 if (opt_exec_name) {
1126 opt_exec_env = envp;
1127 signal(SIGCHLD, handle_sigchild);
1128 }
1129
1130 if (!opt_input_path && !remote_live && !opt_exec_name) {
1131 /* mmap live */
1132 #ifdef LTTNGTOP_MMAP_LIVE
1133 if (opt_textdump) {
1134 signal(SIGTERM, handle_textdump_sigterm);
1135 signal(SIGINT, handle_textdump_sigterm);
1136 }
1137 mmap_live_loop(bt_ctx);
1138 pthread_join(timer_thread, NULL);
1139 quit = 1;
1140 pthread_join(display_thread, NULL);
1141
1142 lttng_stop_tracing("test");
1143 lttng_destroy_session("test");
1144
1145 goto end;
1146 #else
1147 fprintf(stderr, "[ERROR] Mmap live support not compiled, specify a "
1148 "trace directory or -r <relayd hostname/IP>\n");
1149 usage(stdout);
1150 ret = -1;
1151 goto end;
1152 #endif /* LTTNGTOP_MMAP_LIVE */
1153 } else if (!opt_input_path && remote_live) {
1154 /* network live */
1155 bt_ctx = bt_context_create();
1156 ret = bt_context_add_traces_recursive(bt_ctx, opt_relay_hostname,
1157 "lttng-live", NULL);
1158 if (ret < 0) {
1159 fprintf(stderr, "[error] Opening the trace\n");
1160 goto end;
1161 }
1162 } else {
1163 //init_lttngtop();
1164
1165 bt_ctx = bt_context_create();
1166 ret = bt_context_add_traces_recursive(bt_ctx, opt_input_path, "ctf", NULL);
1167 if (ret < 0) {
1168 fprintf(stderr, "[error] Opening the trace\n");
1169 goto end;
1170 }
1171
1172 ret = check_requirements(bt_ctx);
1173 if (ret < 0) {
1174 fprintf(stderr, "[error] some mandatory contexts "
1175 "were missing, exiting.\n");
1176 goto end;
1177 }
1178
1179 if (!opt_textdump) {
1180 pthread_create(&display_thread, NULL, ncurses_display,
1181 (void *) NULL);
1182 pthread_create(&timer_thread, NULL, refresh_thread,
1183 (void *) NULL);
1184 }
1185
1186 iter_trace(bt_ctx);
1187 }
1188
1189
1190 pthread_join(display_thread, NULL);
1191 quit = 1;
1192 pthread_join(timer_thread, NULL);
1193
1194 ret = 0;
1195
1196 end:
1197 if (bt_ctx)
1198 bt_context_put(bt_ctx);
1199
1200 return ret;
1201 }
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