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