src/lttngtop.c

   1 /*
   2  * Copyright (C) 2011-2012 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 <lttng/lttng.h>
  42 #include <lttng/lttngtop-helper.h>
  43 #include <babeltrace/lttngtopmmappacketseek.h>
  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
  53 const char *opt_input_path;
  54 static int opt_textdump;
  55 static int opt_child;
  56
  57 int quit = 0;
  58
  59 struct lttngtop *copy;
  60 pthread_t display_thread;
  61 pthread_t timer_thread;
  62
  63 unsigned long refresh_display = 1 * NSEC_PER_SEC;
  64 unsigned long last_display_update = 0;
  65
  66 /* list of FDs available for being read with snapshots */
  67 struct mmap_stream_list mmap_list;
  68 GPtrArray *lttng_consumer_stream_array;
  69 int sessiond_metadata, consumerd_metadata;
  70 struct lttng_consumer_local_data *ctx = NULL;
  71 /* list of snapshots currently not consumed */
  72 GPtrArray *available_snapshots;
  73 sem_t metadata_available;
  74 int reload_trace = 0;
  75
  76 int last_textdump_print_newline = 1;
  77
  78 enum {
  79         OPT_NONE = 0,
  80         OPT_HELP,
  81         OPT_TEXTDUMP,
  82         OPT_PID,
  83         OPT_CHILD,
  84         OPT_HOSTNAME,
  85         OPT_KPROBES,
  86 };
  87
  88 static struct poptOption long_options[] = {
  89         /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
  90         { "help", 'h', POPT_ARG_NONE, NULL, OPT_HELP, NULL, NULL },
  91         { "textdump", 't', POPT_ARG_NONE, NULL, OPT_TEXTDUMP, NULL, NULL },
  92         { "child", 'f', POPT_ARG_NONE, NULL, OPT_CHILD, NULL, NULL },
  93         { "pid", 'p', POPT_ARG_STRING, &opt_tid, OPT_PID, NULL, NULL },
  94         { "hostname", 'n', POPT_ARG_STRING, &opt_hostname, OPT_HOSTNAME, NULL, NULL },
  95         { "kprobes", 'k', POPT_ARG_STRING, &opt_kprobes, OPT_KPROBES, NULL, NULL },
  96         { NULL, 0, 0, NULL, 0, NULL, NULL },
  97 };
  98
  99 static void handle_textdump_sigterm(int signal)
 100 {
 101         quit = 1;
 102         lttng_destroy_session("test");
 103 }
 104
 105 void *refresh_thread(void *p)
 106 {
 107         struct mmap_stream *mmap_info;
 108
 109         while (1) {
 110                 if (quit) {
 111                         sem_post(&pause_sem);
 112                         sem_post(&timer);
 113                         sem_post(&end_trace_sem);
 114                         sem_post(&goodtodisplay);
 115                         sem_post(&goodtoupdate);
 116                         pthread_exit(0);
 117                 }
 118                 if (!opt_input_path) {
 119                         bt_list_for_each_entry(mmap_info, &mmap_list.head, list)
 120                                 helper_kernctl_buffer_flush(mmap_info->fd);
 121                 }
 122                 sem_wait(&pause_sem);
 123                 sem_post(&pause_sem);
 124                 sem_post(&timer);
 125                 sleep(refresh_display/NSEC_PER_SEC);
 126         }
 127 }
 128
 129 void *ncurses_display(void *p)
 130 {
 131         unsigned int current_display_index = 0;
 132
 133         sem_wait(&bootstrap);
 134         /*
 135          * Prevent the 1 second delay when we hit ESC
 136          */
 137         ESCDELAY = 0;
 138         init_ncurses();
 139
 140         while (1) {
 141                 sem_wait(&timer);
 142                 sem_wait(&goodtodisplay);
 143                 sem_wait(&pause_sem);
 144
 145                 if (quit) {
 146                         sem_post(&pause_sem);
 147                         sem_post(&timer);
 148                         reset_ncurses();
 149                         pthread_exit(0);
 150                 }
 151
 152                 copy = g_ptr_array_index(copies, current_display_index);
 153                 assert(copy);
 154                 display(current_display_index++);
 155
 156                 sem_post(&goodtoupdate);
 157                 sem_post(&pause_sem);
 158         }
 159 }
 160
 161 void print_fields(struct bt_ctf_event *event)
 162 {
 163         unsigned int cnt, i;
 164         const struct definition *const * list;
 165         const struct definition *scope;
 166         enum ctf_type_id type;
 167         const char *str;
 168
 169         scope = bt_ctf_get_top_level_scope(event, BT_EVENT_FIELDS);
 170
 171         bt_ctf_get_field_list(event, scope, &list, &cnt);
 172         for (i = 0; i < cnt; i++) {
 173                 if (i != 0)
 174                         printf(", ");
 175                 printf("%s = ", bt_ctf_field_name(list[i]));
 176                 type = bt_ctf_field_type(list[i]);
 177                 if (type == CTF_TYPE_INTEGER) {
 178                         if (bt_ctf_get_int_signedness(list[i]) == 0)
 179                                 printf("%" PRIu64 "", bt_ctf_get_uint64(list[i]));
 180                         else
 181                                 printf("%" PRId64 "", bt_ctf_get_int64(list[i]));
 182                 } else if (type == CTF_TYPE_STRING) {
 183                         printf("%s", bt_ctf_get_string(list[i]));
 184                 } else if (type == CTF_TYPE_ARRAY) {
 185                         str = bt_ctf_get_char_array(list[i]);
 186                         if (!bt_ctf_field_get_error() && str)
 187                                 printf("%s", str);
 188                 }
 189         }
 190 }
 191
 192 /*
 193  * hook on each event to check the timestamp and refresh the display if
 194  * necessary
 195  */
 196 enum bt_cb_ret print_timestamp(struct bt_ctf_event *call_data, void *private_data)
 197 {
 198         unsigned long timestamp;
 199         struct tm start;
 200         uint64_t ts_nsec_start;
 201         int pid, cpu_id;
 202         int64_t syscall_ret;
 203         const struct definition *scope;
 204         const char *hostname, *procname;
 205
 206         timestamp = bt_ctf_get_timestamp(call_data);
 207
 208         start = format_timestamp(timestamp);
 209         ts_nsec_start = timestamp % NSEC_PER_SEC;
 210
 211         pid = get_context_pid(call_data);
 212         if (pid == -1ULL && opt_tid) {
 213                 goto error;
 214         }
 215
 216         hostname = get_context_hostname(call_data);
 217         if (!opt_tid && (opt_hostname && !lookup_hostname_list(hostname)))
 218                 goto end;
 219         if (!opt_hostname && (opt_tid && !lookup_tid_list(pid)))
 220                 goto end;
 221         if ((opt_tid && !lookup_tid_list(pid)) &&
 222                         (opt_hostname && !lookup_hostname_list(hostname)))
 223                 goto end;
 224
 225         cpu_id = get_cpu_id(call_data);
 226         procname = get_context_comm(call_data);
 227
 228         if ((strcmp(bt_ctf_event_name(call_data), "exit_syscall") == 0) &&
 229                         !last_textdump_print_newline) {
 230                 scope = bt_ctf_get_top_level_scope(call_data,
 231                                 BT_EVENT_FIELDS);
 232                 syscall_ret = bt_ctf_get_int64(bt_ctf_get_field(call_data,
 233                                         scope, "_ret"));
 234                 printf("= %ld\n", syscall_ret);
 235                 last_textdump_print_newline = 1;
 236         } else {
 237                 /* we might have lost the exit_syscall event, so need to
 238                  * print the newline in this case */
 239                 if (last_textdump_print_newline == 0)
 240                         printf("\n");
 241                 printf("%02d:%02d:%02d.%09" PRIu64 " (%s) (cpu %d) [%s (%d)] %s (",
 242                                 start.tm_hour, start.tm_min, start.tm_sec,
 243                                 ts_nsec_start, hostname, cpu_id, procname, pid,
 244                                 bt_ctf_event_name(call_data));
 245                 print_fields(call_data);
 246                 printf(") ");
 247                 if (strncmp(bt_ctf_event_name(call_data), "sys_", 4) != 0) {
 248                         printf("\n");
 249                         last_textdump_print_newline = 1;
 250                 } else {
 251                         last_textdump_print_newline = 0;
 252                 }
 253         }
 254
 255 end:
 256         return BT_CB_OK;
 257 error:
 258         return BT_CB_ERROR_STOP;
 259 }
 260
 261 enum bt_cb_ret handle_kprobes(struct bt_ctf_event *call_data, void *private_data)
 262 {
 263         int i;
 264         struct kprobes *kprobe;
 265
 266         /* for kprobes */
 267         for (i = 0; i < lttngtop.kprobes_table->len; i++) {
 268                 kprobe = g_ptr_array_index(lttngtop.kprobes_table, i);
 269                 if (strcmp(bt_ctf_event_name(call_data), kprobe->probe_name) == 0) {
 270                         kprobe->count++;
 271                 }
 272         }
 273
 274         return BT_CB_OK;
 275 }
 276
 277 /*
 278  * hook on each event to check the timestamp and refresh the display if
 279  * necessary
 280  */
 281 enum bt_cb_ret check_timestamp(struct bt_ctf_event *call_data, void *private_data)
 282 {
 283         unsigned long timestamp;
 284
 285         timestamp = bt_ctf_get_timestamp(call_data);
 286         if (timestamp == -1ULL)
 287                 goto error;
 288
 289         if (last_display_update == 0)
 290                 last_display_update = timestamp;
 291
 292         if (timestamp - last_display_update >= refresh_display) {
 293                 sem_wait(&goodtoupdate);
 294                 g_ptr_array_add(copies, get_copy_lttngtop(last_display_update,
 295                                         timestamp));
 296                 sem_post(&goodtodisplay);
 297                 sem_post(&bootstrap);
 298                 last_display_update = timestamp;
 299         }
 300         return BT_CB_OK;
 301
 302 error:
 303         fprintf(stderr, "check_timestamp callback error\n");
 304         return BT_CB_ERROR_STOP;
 305 }
 306
 307 /*
 308  * get_perf_counter : get or create and return a perf_counter struct for
 309  * either a process or a cpu (only one of the 2 parameters mandatory)
 310  */
 311 struct perfcounter *get_perf_counter(const char *name, struct processtop *proc,
 312                 struct cputime *cpu)
 313 {
 314         struct perfcounter *ret;
 315         GHashTable *table;
 316
 317         if (proc)
 318                 table = proc->perf;
 319         else if (cpu)
 320                 table = cpu->perf;
 321         else
 322                 goto error;
 323
 324         ret = g_hash_table_lookup(table, (gpointer) name);
 325         if (ret)
 326                 goto end;
 327
 328         ret = g_new0(struct perfcounter, 1);
 329         /* by default, make it visible in the UI */
 330         ret->visible = 1;
 331         g_hash_table_insert(table, (gpointer) strdup(name), ret);
 332
 333 end:
 334         return ret;
 335
 336 error:
 337         return NULL;
 338 }
 339
 340 void update_perf_value(struct processtop *proc, struct cputime *cpu,
 341                 const char *name, int value)
 342 {
 343         struct perfcounter *cpu_perf, *process_perf;
 344
 345         cpu_perf = get_perf_counter(name, NULL, cpu);
 346         if (cpu_perf->count < value) {
 347                 process_perf = get_perf_counter(name, proc, NULL);
 348                 process_perf->count += value - cpu_perf->count;
 349                 cpu_perf->count = value;
 350         }
 351 }
 352
 353 void extract_perf_counter_scope(const struct bt_ctf_event *event,
 354                 const struct bt_definition *scope,
 355                 struct processtop *proc,
 356                 struct cputime *cpu)
 357 {
 358         struct bt_definition const * const *list = NULL;
 359         const struct bt_definition *field;
 360         unsigned int count;
 361         struct perfcounter *perfcounter;
 362         GHashTableIter iter;
 363         gpointer key;
 364         int ret;
 365
 366         if (!scope)
 367                 goto end;
 368
 369         ret = bt_ctf_get_field_list(event, scope, &list, &count);
 370         if (ret < 0)
 371                 goto end;
 372
 373         if (count == 0)
 374                 goto end;
 375
 376         g_hash_table_iter_init(&iter, global_perf_liszt);
 377         while (g_hash_table_iter_next (&iter, &key, (gpointer) &perfcounter)) {
 378                 field = bt_ctf_get_field(event, scope, (char *) key);
 379                 if (field) {
 380                         int value = bt_ctf_get_uint64(field);
 381                         if (bt_ctf_field_get_error())
 382                                 continue;
 383                         update_perf_value(proc, cpu, (char *) key, value);
 384                 }
 385         }
 386
 387 end:
 388         return;
 389 }
 390
 391 void update_perf_counter(struct processtop *proc, const struct bt_ctf_event *event)
 392 {
 393         struct cputime *cpu;
 394         const struct bt_definition *scope;
 395
 396         cpu = get_cpu(get_cpu_id(event));
 397
 398         scope = bt_ctf_get_top_level_scope(event, BT_STREAM_EVENT_CONTEXT);
 399         extract_perf_counter_scope(event, scope, proc, cpu);
 400
 401         scope = bt_ctf_get_top_level_scope(event, BT_STREAM_PACKET_CONTEXT);
 402         extract_perf_counter_scope(event, scope, proc, cpu);
 403
 404         scope = bt_ctf_get_top_level_scope(event, BT_EVENT_CONTEXT);
 405         extract_perf_counter_scope(event, scope, proc, cpu);
 406 }
 407
 408 enum bt_cb_ret fix_process_table(struct bt_ctf_event *call_data,
 409                 void *private_data)
 410 {
 411         int pid, tid, ppid, vpid, vtid, vppid;
 412         char *comm, *hostname;
 413         struct processtop *parent, *child;
 414         unsigned long timestamp;
 415
 416         timestamp = bt_ctf_get_timestamp(call_data);
 417         if (timestamp == -1ULL)
 418                 goto error;
 419
 420         pid = get_context_pid(call_data);
 421         if (pid == -1ULL) {
 422                 goto error;
 423         }
 424
 425         tid = get_context_tid(call_data);
 426         if (tid == -1ULL) {
 427                 goto error;
 428         }
 429         ppid = get_context_ppid(call_data);
 430         if (ppid == -1ULL) {
 431                 goto error;
 432         }
 433         vpid = get_context_vpid(call_data);
 434         if (pid == -1ULL) {
 435                 vpid = -1;
 436         }
 437         vtid = get_context_vtid(call_data);
 438         if (tid == -1ULL) {
 439                 vtid = -1;
 440         }
 441         vppid = get_context_vppid(call_data);
 442         if (ppid == -1ULL) {
 443                 vppid = -1;
 444         }
 445         comm = get_context_comm(call_data);
 446         if (!comm) {
 447                 goto error;
 448         }
 449         /* optional */
 450         hostname = get_context_hostname(call_data);
 451
 452         /* find or create the current process */
 453         child = find_process_tid(&lttngtop, tid, comm);
 454         if (!child)
 455                 child = add_proc(&lttngtop, tid, comm, timestamp);
 456         if (!child)
 457                 goto end;
 458         update_proc(child, pid, tid, ppid, vpid, vtid, vppid, comm, hostname);
 459
 460         if (pid != tid) {
 461                 /* find or create the parent */
 462                 parent = find_process_tid(&lttngtop, pid, comm);
 463                 if (!parent) {
 464                         parent = add_proc(&lttngtop, pid, comm, timestamp);
 465                         if (parent)
 466                                 parent->pid = pid;
 467                 }
 468
 469                 /* attach the parent to the current process */
 470                 child->threadparent = parent;
 471                 add_thread(parent, child);
 472         }
 473
 474         update_perf_counter(child, call_data);
 475
 476 end:
 477         return BT_CB_OK;
 478
 479 error:
 480         return BT_CB_ERROR_STOP;
 481 }
 482
 483 void init_lttngtop()
 484 {
 485         copies = g_ptr_array_new();
 486         global_perf_liszt = g_hash_table_new(g_str_hash, g_str_equal);
 487
 488         sem_init(&goodtodisplay, 0, 0);
 489         sem_init(&goodtoupdate, 0, 1);
 490         sem_init(&timer, 0, 1);
 491         sem_init(&bootstrap, 0, 0);
 492         sem_init(&pause_sem, 0, 1);
 493         sem_init(&end_trace_sem, 0, 0);
 494
 495         reset_global_counters();
 496         lttngtop.nbproc = 0;
 497         lttngtop.nbthreads = 0;
 498         lttngtop.nbfiles = 0;
 499
 500         lttngtop.process_hash_table = g_hash_table_new(g_direct_hash,
 501                         g_direct_equal);
 502         lttngtop.process_table = g_ptr_array_new();
 503         lttngtop.files_table = g_ptr_array_new();
 504         lttngtop.cpu_table = g_ptr_array_new();
 505 }
 506
 507 void usage(FILE *fp)
 508 {
 509         fprintf(fp, "LTTngTop %s\n\n", VERSION);
 510         fprintf(fp, "Usage : lttngtop [OPTIONS] [TRACE]\n");
 511         fprintf(fp, "  TRACE                    Path to the trace to analyse (no trace path for live tracing)\n");
 512         fprintf(fp, "  -h, --help               This help message\n");
 513         fprintf(fp, "  -t, --textdump           Display live events in text-only\n");
 514         fprintf(fp, "  -p, --pid                Comma-separated list of PIDs to display\n");
 515         fprintf(fp, "  -f, --child              Follow threads associated with selected PIDs\n");
 516         fprintf(fp, "  -n, --hostname           Comma-separated list of hostnames to display (require hostname context in trace)\n");
 517         fprintf(fp, "  -k, --kprobes            Comma-separated list of kprobes to insert (same format as lttng enable-event)\n");
 518 }
 519
 520 /*
 521  * Parse probe options.
 522  * Shamelessly stolen from lttng-tools :
 523  * src/bin/lttng/commands/enable_events.c
 524  */
 525 static struct kprobes *parse_probe_opts(char *opt)
 526 {
 527         char s_hex[19];
 528         char name[LTTNG_SYMBOL_NAME_LEN];
 529         struct kprobes *kprobe;
 530         int ret;
 531
 532         /*
 533         kprobe->probe_addr = 0;
 534         kprobe->probe_offset = 0;
 535         asprintf(&kprobe->probe_name, "probe_sys_open");
 536         asprintf(&kprobe->symbol_name, "sys_open");
 537         */
 538
 539         if (opt == NULL) {
 540                 kprobe = NULL;
 541                 goto end;
 542         }
 543
 544         kprobe = g_new0(struct kprobes, 1);
 545
 546         /* Check for symbol+offset */
 547         ret = sscanf(opt, "%[^'+']+%s", name, s_hex);
 548         if (ret == 2) {
 549                 asprintf(&kprobe->probe_name, "probe_%s", name);
 550                 asprintf(&kprobe->symbol_name, "%s", name);
 551
 552                 if (strlen(s_hex) == 0) {
 553                         fprintf(stderr, "Invalid probe offset %s", s_hex);
 554                         ret = -1;
 555                         goto end;
 556                 }
 557                 kprobe->probe_offset = strtoul(s_hex, NULL, 0);
 558                 kprobe->probe_addr = 0;
 559                 goto end;
 560         }
 561
 562         /* Check for symbol */
 563         if (isalpha(name[0])) {
 564                 ret = sscanf(opt, "%s", name);
 565                 if (ret == 1) {
 566                         asprintf(&kprobe->probe_name, "probe_%s", name);
 567                         asprintf(&kprobe->symbol_name, "%s", name);
 568                         kprobe->probe_offset = 0;
 569                         kprobe->probe_addr = 0;
 570                         goto end;
 571                 }
 572         }
 573
 574         /* Check for address */
 575         ret = sscanf(opt, "%s", s_hex);
 576         if (ret > 0) {
 577                 if (strlen(s_hex) == 0) {
 578                         fprintf(stderr, "Invalid probe address %s", s_hex);
 579                         ret = -1;
 580                         goto end;
 581                 }
 582                 asprintf(&kprobe->probe_name, "probe_%s", s_hex);
 583                 kprobe->probe_offset = 0;
 584                 kprobe->probe_addr = strtoul(s_hex, NULL, 0);
 585                 goto end;
 586         }
 587
 588         /* No match */
 589         kprobe = NULL;
 590
 591 end:
 592         return kprobe;
 593 }
 594
 595 /*
 596  * Return 0 if caller should continue, < 0 if caller should return
 597  * error, > 0 if caller should exit without reporting error.
 598  */
 599 static int parse_options(int argc, char **argv)
 600 {
 601         poptContext pc;
 602         int opt, ret = 0;
 603         char *tmp_str;
 604         int *tid;
 605
 606         pc = poptGetContext(NULL, argc, (const char **) argv, long_options, 0);
 607         poptReadDefaultConfig(pc, 0);
 608
 609         while ((opt = poptGetNextOpt(pc)) != -1) {
 610                 switch (opt) {
 611                         case OPT_HELP:
 612                                 usage(stdout);
 613                                 ret = 1;    /* exit cleanly */
 614                                 goto end;
 615                         case OPT_TEXTDUMP:
 616                                 opt_textdump = 1;
 617                                 break;
 618                         case OPT_CHILD:
 619                                 opt_textdump = 1;
 620                                 opt_child = 1;
 621                                 break;
 622                         case OPT_PID:
 623                                 tid_list = g_hash_table_new(g_str_hash,
 624                                                 g_str_equal);
 625                                 tmp_str = strtok(opt_tid, ",");
 626                                 while (tmp_str) {
 627                                         tid = malloc(sizeof(int));
 628                                         *tid = atoi(tmp_str);
 629                                         g_hash_table_insert(tid_list,
 630                                                         (gpointer) tid, tid);
 631                                         tmp_str = strtok(NULL, ",");
 632                                 }
 633                                 break;
 634                         case OPT_HOSTNAME:
 635                                 hostname_list = g_hash_table_new(g_str_hash,
 636                                                 g_str_equal);
 637                                 tmp_str = strtok(opt_hostname, ",");
 638                                 while (tmp_str) {
 639                                         char *new_str = strdup(tmp_str);
 640                                         g_hash_table_insert(hostname_list,
 641                                                         (gpointer) new_str,
 642                                                         (gpointer) new_str);
 643                                         tmp_str = strtok(NULL, ",");
 644                                 }
 645                                 break;
 646                         case OPT_KPROBES:
 647                                 lttngtop.kprobes_table = g_ptr_array_new();
 648                                 tmp_str = strtok(opt_kprobes, ",");
 649                                 while (tmp_str) {
 650                                         struct kprobes *kprobe;
 651
 652                                         kprobe = parse_probe_opts(tmp_str);
 653                                         if (kprobe) {
 654                                                 g_ptr_array_add(
 655                                                         lttngtop.kprobes_table,
 656                                                         kprobe);
 657                                         } else {
 658                                                 ret = -EINVAL;
 659                                                 goto end;
 660                                         }
 661                                         tmp_str = strtok(NULL, ",");
 662                                 }
 663                                 break;
 664                         default:
 665                                 ret = -EINVAL;
 666                                 goto end;
 667                 }
 668         }
 669
 670         opt_input_path = poptGetArg(pc);
 671
 672 end:
 673         if (pc) {
 674                 poptFreeContext(pc);
 675         }
 676         return ret;
 677 }
 678
 679 void iter_trace(struct bt_context *bt_ctx)
 680 {
 681         struct bt_ctf_iter *iter;
 682         struct bt_iter_pos begin_pos;
 683         struct kprobes *kprobe;
 684         const struct bt_ctf_event *event;
 685         int i;
 686         int ret = 0;
 687
 688         begin_pos.type = BT_SEEK_BEGIN;
 689         iter = bt_ctf_iter_create(bt_ctx, &begin_pos, NULL);
 690
 691         if (opt_textdump) {
 692                 bt_ctf_iter_add_callback(iter, 0, NULL, 0,
 693                                 print_timestamp,
 694                                 NULL, NULL, NULL);
 695         } else {
 696                 /* at each event check if we need to refresh */
 697                 bt_ctf_iter_add_callback(iter, 0, NULL, 0,
 698                                 check_timestamp,
 699                                 NULL, NULL, NULL);
 700                 /* at each event, verify the status of the process table */
 701                 bt_ctf_iter_add_callback(iter, 0, NULL, 0,
 702                                 fix_process_table,
 703                                 NULL, NULL, NULL);
 704                 /* to handle the scheduling events */
 705                 bt_ctf_iter_add_callback(iter,
 706                                 g_quark_from_static_string("sched_switch"),
 707                                 NULL, 0, handle_sched_switch, NULL, NULL, NULL);
 708                 /* to clean up the process table */
 709                 bt_ctf_iter_add_callback(iter,
 710                                 g_quark_from_static_string("sched_process_free"),
 711                                 NULL, 0, handle_sched_process_free, NULL, NULL, NULL);
 712                 /* to get all the process from the statedumps */
 713                 bt_ctf_iter_add_callback(iter,
 714                                 g_quark_from_static_string(
 715                                         "lttng_statedump_process_state"),
 716                                 NULL, 0, handle_statedump_process_state,
 717                                 NULL, NULL, NULL);
 718
 719                 /* for IO top */
 720                 bt_ctf_iter_add_callback(iter,
 721                                 g_quark_from_static_string("exit_syscall"),
 722                                 NULL, 0, handle_exit_syscall, NULL, NULL, NULL);
 723                 bt_ctf_iter_add_callback(iter,
 724                                 g_quark_from_static_string("sys_write"),
 725                                 NULL, 0, handle_sys_write, NULL, NULL, NULL);
 726                 bt_ctf_iter_add_callback(iter,
 727                                 g_quark_from_static_string("sys_read"),
 728                                 NULL, 0, handle_sys_read, NULL, NULL, NULL);
 729                 bt_ctf_iter_add_callback(iter,
 730                                 g_quark_from_static_string("sys_open"),
 731                                 NULL, 0, handle_sys_open, NULL, NULL, NULL);
 732                 bt_ctf_iter_add_callback(iter,
 733                                 g_quark_from_static_string("sys_close"),
 734                                 NULL, 0, handle_sys_close, NULL, NULL, NULL);
 735                 bt_ctf_iter_add_callback(iter,
 736                                 g_quark_from_static_string(
 737                                         "lttng_statedump_file_descriptor"),
 738                                 NULL, 0, handle_statedump_file_descriptor,
 739                                 NULL, NULL, NULL);
 740
 741                 /* for kprobes */
 742                 for (i = 0; i < lttngtop.kprobes_table->len; i++) {
 743                         kprobe = g_ptr_array_index(lttngtop.kprobes_table, i);
 744                         bt_ctf_iter_add_callback(iter,
 745                                         g_quark_from_static_string(
 746                                                 kprobe->probe_name),
 747                                         NULL, 0, handle_kprobes,
 748                                         NULL, NULL, NULL);
 749                 }
 750         }
 751
 752         while ((event = bt_ctf_iter_read_event(iter)) != NULL) {
 753                 if (quit || reload_trace)
 754                         goto end_iter;
 755                 ret = bt_iter_next(bt_ctf_get_iter(iter));
 756                 if (ret < 0)
 757                         goto end_iter;
 758         }
 759
 760         /* block until quit, we reached the end of the trace */
 761         sem_wait(&end_trace_sem);
 762
 763 end_iter:
 764         bt_ctf_iter_destroy(iter);
 765 }
 766
 767 /*
 768  * bt_context_add_traces_recursive: Open a trace recursively
 769  * (copied from BSD code in converter/babeltrace.c)
 770  *
 771  * Find each trace present in the subdirectory starting from the given
 772  * path, and add them to the context. The packet_seek parameter can be
 773  * NULL: this specify to use the default format packet_seek.
 774  *
 775  * Return: 0 on success, nonzero on failure.
 776  * Unable to open toplevel: failure.
 777  * Unable to open some subdirectory or file: warn and continue;
 778  */
 779 int bt_context_add_traces_recursive(struct bt_context *ctx, const char *path,
 780                 const char *format_str,
 781                 void (*packet_seek)(struct bt_stream_pos *pos,
 782                         size_t offset, int whence))
 783 {
 784         FTS *tree;
 785         FTSENT *node;
 786         GArray *trace_ids;
 787         char lpath[PATH_MAX];
 788         char * const paths[2] = { lpath, NULL };
 789         int ret = -1;
 790
 791         /*
 792          * Need to copy path, because fts_open can change it.
 793          * It is the pointer array, not the strings, that are constant.
 794          */
 795         strncpy(lpath, path, PATH_MAX);
 796         lpath[PATH_MAX - 1] = '\0';
 797
 798         tree = fts_open(paths, FTS_NOCHDIR | FTS_LOGICAL, 0);
 799         if (tree == NULL) {
 800                 fprintf(stderr, "[error] [Context] Cannot traverse \"%s\" for reading.\n",
 801                                 path);
 802                 return -EINVAL;
 803         }
 804
 805         trace_ids = g_array_new(FALSE, TRUE, sizeof(int));
 806
 807         while ((node = fts_read(tree))) {
 808                 int dirfd, metafd;
 809
 810                 if (!(node->fts_info & FTS_D))
 811                         continue;
 812
 813                 dirfd = open(node->fts_accpath, 0);
 814                 if (dirfd < 0) {
 815                         fprintf(stderr, "[error] [Context] Unable to open trace "
 816                                 "directory file descriptor.\n");
 817                         ret = dirfd;
 818                         goto error;
 819                 }
 820                 metafd = openat(dirfd, "metadata", O_RDONLY);
 821                 if (metafd < 0) {
 822                         close(dirfd);
 823                         ret = -1;
 824                         continue;
 825                 } else {
 826                         int trace_id;
 827
 828                         ret = close(metafd);
 829                         if (ret < 0) {
 830                                 perror("close");
 831                                 goto error;
 832                         }
 833                         ret = close(dirfd);
 834                         if (ret < 0) {
 835                                 perror("close");
 836                                 goto error;
 837                         }
 838
 839                         trace_id = bt_context_add_trace(ctx,
 840                                 node->fts_accpath, format_str,
 841                                 packet_seek, NULL, NULL);
 842                         if (trace_id < 0) {
 843                                 fprintf(stderr, "[warning] [Context] opening trace \"%s\" from %s "
 844                                         "for reading.\n", node->fts_accpath, path);
 845                                 /* Allow to skip erroneous traces. */
 846                                 continue;
 847                         }
 848                         g_array_append_val(trace_ids, trace_id);
 849                 }
 850         }
 851
 852         g_array_free(trace_ids, TRUE);
 853         return ret;
 854
 855 error:
 856         return ret;
 857 }
 858
 859 static int check_field_requirements(const struct bt_ctf_field_decl *const * field_list,
 860                 int field_cnt, int *tid_check, int *pid_check,
 861                 int *procname_check, int *ppid_check)
 862 {
 863         int j;
 864         struct perfcounter *global;
 865         const char *name;
 866
 867         for (j = 0; j < field_cnt; j++) {
 868                 name = bt_ctf_get_decl_field_name(field_list[j]);
 869                 if (*tid_check == 0) {
 870                         if (strncmp(name, "tid", 3) == 0)
 871                                 (*tid_check)++;
 872                 }
 873                 if (*pid_check == 0) {
 874                         if (strncmp(name, "pid", 3) == 0)
 875                                 (*pid_check)++;
 876                 }
 877                 if (*ppid_check == 0) {
 878                         if (strncmp(name, "ppid", 4) == 0)
 879                                 (*ppid_check)++;
 880                 }
 881                 if (*procname_check == 0) {
 882                         if (strncmp(name, "procname", 8) == 0)
 883                                 (*procname_check)++;
 884                 }
 885                 if (strncmp(name, "perf_", 5) == 0) {
 886                         global = g_hash_table_lookup(global_perf_liszt, (gpointer) name);
 887                         if (!global) {
 888                                 global = g_new0(struct perfcounter, 1);
 889                                 /* by default, sort on the first perf context */
 890                                 if (g_hash_table_size(global_perf_liszt) == 0)
 891                                         global->sort = 1;
 892                                 global->visible = 1;
 893                                 g_hash_table_insert(global_perf_liszt, (gpointer) strdup(name), global);
 894                         }
 895                 }
 896         }
 897
 898         if (*tid_check == 1 && *pid_check == 1 && *ppid_check == 1 &&
 899                         *procname_check == 1)
 900                 return 0;
 901
 902         return -1;
 903 }
 904
 905 /*
 906  * check_requirements: check if the required context informations are available
 907  *
 908  * If each mandatory context information is available for at least in one
 909  * event, return 0 otherwise return -1.
 910  */
 911 int check_requirements(struct bt_context *ctx)
 912 {
 913         unsigned int i, evt_cnt, field_cnt;
 914         struct bt_ctf_event_decl *const * evt_list;
 915         const struct bt_ctf_field_decl *const * field_list;
 916         int tid_check = 0;
 917         int pid_check = 0;
 918         int procname_check = 0;
 919         int ppid_check = 0;
 920         int ret = 0;
 921
 922         bt_ctf_get_event_decl_list(0, ctx, &evt_list, &evt_cnt);
 923         for (i = 0; i < evt_cnt; i++) {
 924                 bt_ctf_get_decl_fields(evt_list[i], BT_STREAM_EVENT_CONTEXT,
 925                                 &field_list, &field_cnt);
 926                 ret = check_field_requirements(field_list, field_cnt,
 927                                 &tid_check, &pid_check, &procname_check,
 928                                 &ppid_check);
 929
 930                 bt_ctf_get_decl_fields(evt_list[i], BT_EVENT_CONTEXT,
 931                                 &field_list, &field_cnt);
 932                 ret = check_field_requirements(field_list, field_cnt,
 933                                 &tid_check, &pid_check, &procname_check,
 934                                 &ppid_check);
 935
 936                 bt_ctf_get_decl_fields(evt_list[i], BT_STREAM_PACKET_CONTEXT,
 937                                 &field_list, &field_cnt);
 938                 ret = check_field_requirements(field_list, field_cnt,
 939                                 &tid_check, &pid_check, &procname_check,
 940                                 &ppid_check);
 941         }
 942
 943         if (tid_check == 0) {
 944                 ret = -1;
 945                 fprintf(stderr, "[error] missing tid context information\n");
 946         }
 947         if (pid_check == 0) {
 948                 ret = -1;
 949                 fprintf(stderr, "[error] missing pid context information\n");
 950         }
 951         if (ppid_check == 0) {
 952                 ret = -1;
 953                 fprintf(stderr, "[error] missing ppid context information\n");
 954         }
 955         if (procname_check == 0) {
 956                 ret = -1;
 957                 fprintf(stderr, "[error] missing procname context information\n");
 958         }
 959
 960         return ret;
 961 }
 962
 963 ssize_t read_subbuffer(struct lttng_consumer_stream *kconsumerd_fd,
 964                 struct lttng_consumer_local_data *ctx)
 965 {
 966         unsigned long len;
 967         int err;
 968         long ret = 0;
 969         int infd = helper_get_lttng_consumer_stream_wait_fd(kconsumerd_fd);
 970
 971         if (helper_get_lttng_consumer_stream_output(kconsumerd_fd) == LTTNG_EVENT_SPLICE) {
 972                 /* Get the next subbuffer */
 973                 err = helper_kernctl_get_next_subbuf(infd);
 974                 if (err != 0) {
 975                         ret = errno;
 976                         perror("Reserving sub buffer failed (everything is normal, "
 977                                         "it is due to concurrency)");
 978                         goto end;
 979                 }
 980                 /* read the whole subbuffer */
 981                 err = helper_kernctl_get_padded_subbuf_size(infd, &len);
 982                 if (err != 0) {
 983                         ret = errno;
 984                         perror("Getting sub-buffer len failed.");
 985                         goto end;
 986                 }
 987
 988                 /* splice the subbuffer to the tracefile */
 989                 ret = helper_lttng_consumer_on_read_subbuffer_splice(ctx, kconsumerd_fd, len);
 990                 if (ret < 0) {
 991                         /*
 992                          * display the error but continue processing to try
 993                          * to release the subbuffer
 994                          */
 995                         fprintf(stderr,"Error splicing to tracefile\n");
 996                 }
 997                 err = helper_kernctl_put_next_subbuf(infd);
 998                 if (err != 0) {
 999                         ret = errno;
1000                         perror("Reserving sub buffer failed (everything is normal, "
1001                                         "it is due to concurrency)");
1002                         goto end;
1003                 }
1004                 sem_post(&metadata_available);
1005         }
1006
1007 end:
1008         return 0;
1009 }
1010
1011 int on_update_fd(int key, uint32_t state)
1012 {
1013         /* let the lib handle the metadata FD */
1014         if (key == sessiond_metadata)
1015                 return 0;
1016         return 1;
1017 }
1018
1019 int on_recv_fd(struct lttng_consumer_stream *kconsumerd_fd)
1020 {
1021         int ret;
1022         struct mmap_stream *new_mmap_stream;
1023
1024         /* Opening the tracefile in write mode */
1025         if (helper_get_lttng_consumer_stream_path_name(kconsumerd_fd) != NULL) {
1026                 ret = open(helper_get_lttng_consumer_stream_path_name(kconsumerd_fd),
1027                                 O_WRONLY|O_CREAT|O_TRUNC, S_IRWXU|S_IRWXG|S_IRWXO);
1028                 if (ret < 0) {
1029                         perror("open");
1030                         goto end;
1031                 }
1032                 helper_set_lttng_consumer_stream_out_fd(kconsumerd_fd, ret);
1033         }
1034
1035         if (helper_get_lttng_consumer_stream_output(kconsumerd_fd) == LTTNG_EVENT_MMAP) {
1036                 new_mmap_stream = malloc(sizeof(struct mmap_stream));
1037                 new_mmap_stream->fd = helper_get_lttng_consumer_stream_wait_fd(
1038                                 kconsumerd_fd);
1039                 bt_list_add(&new_mmap_stream->list, &mmap_list.head);
1040
1041                 g_ptr_array_add(lttng_consumer_stream_array, kconsumerd_fd);
1042                 /* keep mmap FDs internally */
1043                 ret = 1;
1044         } else {
1045                 consumerd_metadata = helper_get_lttng_consumer_stream_wait_fd(kconsumerd_fd);
1046                 sessiond_metadata = helper_get_lttng_consumer_stream_key(kconsumerd_fd);
1047                 ret = 0;
1048         }
1049
1050         reload_trace = 1;
1051
1052 end:
1053         return ret;
1054 }
1055
1056 void live_consume(struct bt_context **bt_ctx)
1057 {
1058         int ret;
1059         FILE *metadata_fp;
1060
1061         sem_wait(&metadata_available);
1062         if (access("/tmp/livesession/kernel/metadata", F_OK) != 0) {
1063                 fprintf(stderr,"no metadata\n");
1064                 goto end;
1065         }
1066         metadata_fp = fopen("/tmp/livesession/kernel/metadata", "r");
1067
1068         *bt_ctx = bt_context_create();
1069         ret = bt_context_add_trace(*bt_ctx, NULL, "ctf",
1070                         lttngtop_ctf_packet_seek, &mmap_list, metadata_fp);
1071         if (ret < 0) {
1072                 printf("Error adding trace\n");
1073                 goto end;
1074         }
1075
1076 end:
1077         return;
1078 }
1079
1080 int setup_consumer(char *command_sock_path, pthread_t *threads,
1081                 struct lttng_consumer_local_data *ctx)
1082 {
1083         int ret = 0;
1084
1085         ctx = helper_lttng_consumer_create(HELPER_LTTNG_CONSUMER_KERNEL,
1086                 read_subbuffer, NULL, on_recv_fd, on_update_fd);
1087         if (!ctx)
1088                 goto end;
1089
1090         unlink(command_sock_path);
1091         helper_lttng_consumer_set_command_sock_path(ctx, command_sock_path);
1092         helper_lttng_consumer_init();
1093
1094         /* Create the thread to manage the receive of fd */
1095         ret = pthread_create(&threads[0], NULL, helper_lttng_consumer_thread_receive_fds,
1096                         (void *) ctx);
1097         if (ret != 0) {
1098                 perror("pthread_create receive fd");
1099                 goto end;
1100         }
1101         /* Create thread to manage the polling/writing of traces */
1102         ret = pthread_create(&threads[1], NULL, helper_lttng_consumer_thread_poll_fds,
1103                         (void *) ctx);
1104         if (ret != 0) {
1105                 perror("pthread_create poll fd");
1106                 goto end;
1107         }
1108
1109 end:
1110         return ret;
1111 }
1112
1113 int enable_kprobes(struct lttng_handle *handle, char *channel_name)
1114 {
1115         struct lttng_event ev;
1116         struct kprobes *kprobe;
1117         int ret = 0;
1118         int i;
1119
1120         for (i = 0; i < lttngtop.kprobes_table->len; i++) {
1121                 kprobe = g_ptr_array_index(lttngtop.kprobes_table, i);
1122
1123                 memset(&ev, '\0', sizeof(struct lttng_event));
1124                 ev.type = LTTNG_EVENT_PROBE;
1125                 if (kprobe->symbol_name)
1126                         sprintf(ev.attr.probe.symbol_name, "%s", kprobe->symbol_name);
1127                 sprintf(ev.name, "%s", kprobe->probe_name);
1128                 ev.attr.probe.addr = kprobe->probe_addr;
1129                 ev.attr.probe.offset = kprobe->probe_offset;
1130                 if ((ret = lttng_enable_event(handle, &ev, channel_name)) < 0) {
1131                         fprintf(stderr,"error enabling kprobes : %s\n",
1132                                         helper_lttcomm_get_readable_code(ret));
1133                         goto end;
1134                 }
1135         }
1136
1137 end:
1138         return ret;
1139 }
1140
1141 int setup_live_tracing()
1142 {
1143         struct lttng_domain dom;
1144         struct lttng_channel chan;
1145         char *channel_name = "mmapchan";
1146         struct lttng_event ev;
1147         int ret = 0;
1148         char *command_sock_path = "/tmp/consumerd_sock";
1149         static pthread_t threads[2]; /* recv_fd, poll */
1150         struct lttng_event_context kctxpid, kctxcomm, kctxppid, kctxtid;
1151
1152         struct lttng_handle *handle;
1153
1154         BT_INIT_LIST_HEAD(&mmap_list.head);
1155
1156         lttng_consumer_stream_array = g_ptr_array_new();
1157
1158         if ((ret = setup_consumer(command_sock_path, threads, ctx)) < 0) {
1159                 fprintf(stderr,"error setting up consumer\n");
1160                 goto error;
1161         }
1162
1163         available_snapshots = g_ptr_array_new();
1164
1165         /* setup the session */
1166         dom.type = LTTNG_DOMAIN_KERNEL;
1167
1168         ret = unlink("/tmp/livesession");
1169
1170         lttng_destroy_session("test");
1171         if ((ret = lttng_create_session("test", "/tmp/livesession")) < 0) {
1172                 fprintf(stderr,"error creating the session : %s\n",
1173                                 helper_lttcomm_get_readable_code(ret));
1174                 goto error;
1175         }
1176
1177         if ((handle = lttng_create_handle("test", &dom)) == NULL) {
1178                 fprintf(stderr,"error creating handle\n");
1179                 goto error_session;
1180         }
1181
1182         /*
1183          * FIXME : need to let the
1184          * helper_lttng_consumer_thread_receive_fds create the
1185          * socket.
1186          * Cleaner solution ?
1187          */
1188         while (access(command_sock_path, F_OK)) {
1189                 sleep(0.1);
1190         }
1191
1192         if ((ret = lttng_register_consumer(handle, command_sock_path)) < 0) {
1193                 fprintf(stderr,"error registering consumer : %s\n",
1194                                 helper_lttcomm_get_readable_code(ret));
1195                 goto error_session;
1196         }
1197
1198         strcpy(chan.name, channel_name);
1199         chan.attr.overwrite = 0;
1200         if (opt_tid && opt_textdump) {
1201                 chan.attr.subbuf_size = 32768;
1202                 chan.attr.num_subbuf = 8;
1203         } else {
1204                 chan.attr.subbuf_size = 1048576; /* 1MB */
1205                 chan.attr.num_subbuf = 4;
1206         }
1207         chan.attr.switch_timer_interval = 0;
1208         chan.attr.read_timer_interval = 200;
1209         chan.attr.output = LTTNG_EVENT_MMAP;
1210
1211         if ((ret = lttng_enable_channel(handle, &chan)) < 0) {
1212                 fprintf(stderr,"error creating channel : %s\n",
1213                                 helper_lttcomm_get_readable_code(ret));
1214                 goto error_session;
1215         }
1216
1217         memset(&ev, '\0', sizeof(struct lttng_event));
1218         //sprintf(ev.name, "sched_switch");
1219         ev.type = LTTNG_EVENT_TRACEPOINT;
1220         if ((ret = lttng_enable_event(handle, &ev, channel_name)) < 0) {
1221                 fprintf(stderr,"error enabling event : %s\n",
1222                                 helper_lttcomm_get_readable_code(ret));
1223                 goto error_session;
1224         }
1225
1226         memset(&ev, '\0', sizeof(struct lttng_event));
1227         ev.type = LTTNG_EVENT_SYSCALL;
1228         if ((ret = lttng_enable_event(handle, &ev, channel_name)) < 0) {
1229                 fprintf(stderr,"error enabling syscalls : %s\n",
1230                                 helper_lttcomm_get_readable_code(ret));
1231                 goto error_session;
1232         }
1233
1234         if (lttngtop.kprobes_table) {
1235                 ret = enable_kprobes(handle, channel_name);
1236                 if (ret < 0) {
1237                         goto error_session;
1238                 }
1239         }
1240
1241         kctxpid.ctx = LTTNG_EVENT_CONTEXT_PID;
1242         lttng_add_context(handle, &kctxpid, NULL, NULL);
1243         kctxtid.ctx = LTTNG_EVENT_CONTEXT_TID;
1244         lttng_add_context(handle, &kctxtid, NULL, NULL);
1245         kctxppid.ctx = LTTNG_EVENT_CONTEXT_PPID;
1246         lttng_add_context(handle, &kctxppid, NULL, NULL);
1247         kctxcomm.ctx = LTTNG_EVENT_CONTEXT_PROCNAME;
1248         lttng_add_context(handle, &kctxcomm, NULL, NULL);
1249         kctxpid.ctx = LTTNG_EVENT_CONTEXT_VPID;
1250         lttng_add_context(handle, &kctxpid, NULL, NULL);
1251         kctxtid.ctx = LTTNG_EVENT_CONTEXT_VTID;
1252         lttng_add_context(handle, &kctxtid, NULL, NULL);
1253         kctxtid.ctx = LTTNG_EVENT_CONTEXT_HOSTNAME;
1254         lttng_add_context(handle, &kctxtid, NULL, NULL);
1255
1256         if ((ret = lttng_start_tracing("test")) < 0) {
1257                 fprintf(stderr,"error starting tracing : %s\n",
1258                                 helper_lttcomm_get_readable_code(ret));
1259                 goto error_session;
1260         }
1261
1262         helper_kernctl_buffer_flush(consumerd_metadata);
1263
1264         /* block until metadata is ready */
1265         sem_init(&metadata_available, 0, 0);
1266
1267         return 0;
1268
1269 error_session:
1270         lttng_destroy_session("test");
1271 error:
1272         return -1;
1273 }
1274
1275 int main(int argc, char **argv)
1276 {
1277         int ret;
1278         struct bt_context *bt_ctx = NULL;
1279         struct mmap_stream *mmap_info;
1280         unsigned long mmap_len;
1281
1282         init_lttngtop();
1283         ret = parse_options(argc, argv);
1284         if (ret < 0) {
1285                 fprintf(stdout, "Error parsing options.\n\n");
1286                 usage(stdout);
1287                 exit(EXIT_FAILURE);
1288         } else if (ret > 0) {
1289                 exit(EXIT_SUCCESS);
1290         }
1291
1292         if (!opt_input_path) {
1293                 if (opt_textdump) {
1294                         signal(SIGTERM, handle_textdump_sigterm);
1295                         signal(SIGINT, handle_textdump_sigterm);
1296                 }
1297                 ret = setup_live_tracing();
1298                 if (ret < 0) {
1299                         goto end;
1300                 }
1301                 if (!opt_textdump) {
1302                         pthread_create(&display_thread, NULL, ncurses_display, (void *) NULL);
1303                         pthread_create(&timer_thread, NULL, refresh_thread, (void *) NULL);
1304                 }
1305                 while (!quit) {
1306                         reload_trace = 0;
1307                         live_consume(&bt_ctx);
1308                         iter_trace(bt_ctx);
1309                         ret = bt_context_remove_trace(bt_ctx, 0);
1310                         if (ret != 0)
1311                                 fprintf(stderr, "error removing trace\n");
1312                         if (bt_ctx) {
1313                                 bt_context_put(bt_ctx);
1314                         }
1315
1316                         /*
1317                          * since we receive all FDs every time there is an
1318                          * update and the FD number is different every time,
1319                          * we don't know which one are valid.
1320                          * so we check if all FDs are usable with a simple
1321                          * ioctl call.
1322                          */
1323                         bt_list_for_each_entry(mmap_info, &mmap_list.head, list) {
1324                                 ret = helper_kernctl_get_mmap_len(mmap_info->fd, &mmap_len);
1325                                 if (ret != 0) {
1326                                         bt_list_del(&mmap_info->list);
1327                                 }
1328                         }
1329                         sem_post(&metadata_available);
1330                 }
1331
1332                 pthread_join(timer_thread, NULL);
1333                 quit = 1;
1334                 pthread_join(display_thread, NULL);
1335
1336                 lttng_stop_tracing("test");
1337                 lttng_destroy_session("test");
1338
1339                 goto end;
1340         } else {
1341                 //init_lttngtop();
1342
1343                 bt_ctx = bt_context_create();
1344                 ret = bt_context_add_traces_recursive(bt_ctx, opt_input_path, "ctf", NULL);
1345                 if (ret < 0) {
1346                         fprintf(stderr, "[error] Opening the trace\n");
1347                         goto end;
1348                 }
1349
1350                 ret = check_requirements(bt_ctx);
1351                 if (ret < 0) {
1352                         fprintf(stderr, "[error] some mandatory contexts were missing, exiting.\n");
1353                         goto end;
1354                 }
1355                 pthread_create(&display_thread, NULL, ncurses_display, (void *) NULL);
1356                 pthread_create(&timer_thread, NULL, refresh_thread, (void *) NULL);
1357
1358                 iter_trace(bt_ctx);
1359
1360                 pthread_join(display_thread, NULL);
1361                 quit = 1;
1362                 pthread_join(timer_thread, NULL);
1363         }
1364
1365 end:
1366         if (bt_ctx)
1367                 bt_context_put(bt_ctx);
1368
1369         return 0;
1370 }