src/lttngtop.c

   1 /*
   2  * Copyright (C) 2013 Julien Desfossez
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License Version 2 as
   6  * published by the Free Software Foundation;
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along
  14  * with this program; if not, write to the Free Software Foundation, Inc.,
  15  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  16  */
  17
  18 #define _GNU_SOURCE
  19 #include <config.h>
  20 #include <stdio.h>
  21 #include <stdint.h>
  22 #include <babeltrace/babeltrace.h>
  23 #include <babeltrace/ctf/events.h>
  24 #include <babeltrace/ctf/callbacks.h>
  25 #include <babeltrace/ctf/iterator.h>
  26 #include <fcntl.h>
  27 #include <pthread.h>
  28 #include <popt.h>
  29 #include <stdlib.h>
  30 #include <ftw.h>
  31 #include <dirent.h>
  32 #include <ctype.h>
  33 #include <sys/stat.h>
  34 #include <unistd.h>
  35 #include <string.h>
  36 #include <errno.h>
  37 #include <sys/types.h>
  38 #include <fts.h>
  39 #include <assert.h>
  40 #include <sys/mman.h>
  41 #include <lttng/lttng.h>
  42 #ifdef LTTNGTOP_MMAP_LIVE
  43 #include <lttng/lttngtop-helper.h>
  44 #include <babeltrace/lttngtopmmappacketseek.h>
  45 #include "mmap-live.h"
  46 #endif /* LTTNGTOP_MMAP_LIVE */
  47
  48 #include "lttngtoptypes.h"
  49 #include "cputop.h"
  50 #include "iostreamtop.h"
  51 #include "cursesdisplay.h"
  52 #include "common.h"
  53 #include "network-live.h"
  54
  55 #define NET_URL_PREFIX  "net://"
  56 #define NET4_URL_PREFIX "net4://"
  57 #define NET6_URL_PREFIX "net6://"
  58
  59 #define DEFAULT_FILE_ARRAY_SIZE 1
  60
  61 const char *opt_input_path;
  62 int opt_textdump;
  63 int opt_child;
  64 int opt_begin;
  65
  66 int quit = 0;
  67
  68 struct lttngtop *copy;
  69 pthread_t display_thread;
  70 pthread_t timer_thread;
  71
  72 unsigned long refresh_display = 1 * NSEC_PER_SEC;
  73 unsigned long last_display_update = 0;
  74 unsigned long last_event_ts = 0;
  75
  76 /* list of FDs available for being read with snapshots */
  77 struct bt_mmap_stream_list mmap_list;
  78 GPtrArray *lttng_consumer_stream_array;
  79 int sessiond_metadata, consumerd_metadata;
  80 struct lttng_consumer_local_data *ctx = NULL;
  81 /* list of snapshots currently not consumed */
  82 GPtrArray *available_snapshots;
  83 sem_t metadata_available;
  84 int reload_trace = 0;
  85
  86 uint64_t prev_ts = 0;
  87
  88 enum {
  89         OPT_NONE = 0,
  90         OPT_HELP,
  91         OPT_TEXTDUMP,
  92         OPT_PID,
  93         OPT_CHILD,
  94         OPT_HOSTNAME,
  95         OPT_RELAY_HOSTNAME,
  96         OPT_KPROBES,
  97         OPT_BEGIN,
  98 };
  99
 100 static struct poptOption long_options[] = {
 101         /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
 102         { "help", 'h', POPT_ARG_NONE, NULL, OPT_HELP, NULL, NULL },
 103         { "textdump", 't', POPT_ARG_NONE, NULL, OPT_TEXTDUMP, NULL, NULL },
 104         { "child", 'f', POPT_ARG_NONE, NULL, OPT_CHILD, NULL, NULL },
 105         { "begin", 'b', POPT_ARG_NONE, NULL, OPT_BEGIN, NULL, NULL },
 106         { "pid", 'p', POPT_ARG_STRING, &opt_tid, OPT_PID, NULL, NULL },
 107         { "hostname", 'n', POPT_ARG_STRING, &opt_hostname, OPT_HOSTNAME, NULL, NULL },
 108         { "relay-hostname", 'r', POPT_ARG_STRING, &opt_relay_hostname,
 109                 OPT_RELAY_HOSTNAME, NULL, NULL },
 110         { "kprobes", 'k', POPT_ARG_STRING, &opt_kprobes, OPT_KPROBES, NULL, NULL },
 111         { NULL, 0, 0, NULL, 0, NULL, NULL },
 112 };
 113
 114 #ifdef LTTNGTOP_MMAP_LIVE
 115 static void handle_textdump_sigterm(int signal)
 116 {
 117         quit = 1;
 118         lttng_destroy_session("test");
 119 }
 120 #endif
 121
 122 void *refresh_thread(void *p)
 123 {
 124         while (1) {
 125                 if (quit) {
 126                         sem_post(&pause_sem);
 127                         sem_post(&timer);
 128                         sem_post(&end_trace_sem);
 129                         sem_post(&goodtodisplay);
 130                         sem_post(&goodtoupdate);
 131                         pthread_exit(0);
 132                 }
 133                 if (!opt_input_path) {
 134 #ifdef LTTNGTOP_MMAP_LIVE
 135                         mmap_live_flush(mmap_list);
 136 #endif
 137                 }
 138                 sem_wait(&pause_sem);
 139                 sem_post(&pause_sem);
 140                 sem_post(&timer);
 141                 sleep(refresh_display/NSEC_PER_SEC);
 142         }
 143 }
 144
 145 void *ncurses_display(void *p)
 146 {
 147         unsigned int current_display_index = 0;
 148
 149         sem_wait(&bootstrap);
 150         /*
 151          * Prevent the 1 second delay when we hit ESC
 152          */
 153         ESCDELAY = 0;
 154         init_ncurses();
 155
 156         while (1) {
 157                 sem_wait(&timer);
 158                 sem_wait(&goodtodisplay);
 159                 sem_wait(&pause_sem);
 160
 161                 if (quit) {
 162                         sem_post(&pause_sem);
 163                         sem_post(&timer);
 164                         reset_ncurses();
 165                         pthread_exit(0);
 166                 }
 167
 168                 copy = g_ptr_array_index(copies, current_display_index);
 169                 assert(copy);
 170                 display(current_display_index++);
 171
 172                 sem_post(&goodtoupdate);
 173                 sem_post(&pause_sem);
 174         }
 175 }
 176
 177 void print_fields(struct bt_ctf_event *event)
 178 {
 179         unsigned int cnt, i;
 180         const struct bt_definition *const * list;
 181         const struct bt_declaration *l;
 182         const struct bt_definition *scope;
 183         enum ctf_type_id type;
 184         const char *str;
 185
 186         scope = bt_ctf_get_top_level_scope(event, BT_EVENT_FIELDS);
 187
 188         bt_ctf_get_field_list(event, scope, &list, &cnt);
 189         for (i = 0; i < cnt; i++) {
 190                 if (i != 0)
 191                         printf(", ");
 192                 printf("%s = ", bt_ctf_field_name(list[i]));
 193                 l = bt_ctf_get_decl_from_def(list[i]);
 194                 type = bt_ctf_field_type(l);
 195                 if (type == CTF_TYPE_INTEGER) {
 196                         if (bt_ctf_get_int_signedness(l) == 0)
 197                                 printf("%" PRIu64 "", bt_ctf_get_uint64(list[i]));
 198                         else
 199                                 printf("%" PRId64 "", bt_ctf_get_int64(list[i]));
 200                 } else if (type == CTF_TYPE_STRING) {
 201                         printf("%s", bt_ctf_get_string(list[i]));
 202                 } else if (type == CTF_TYPE_ARRAY) {
 203                         str = bt_ctf_get_char_array(list[i]);
 204                         if (!bt_ctf_field_get_error() && str)
 205                                 printf("%s", str);
 206                 }
 207         }
 208 }
 209
 210 /*
 211  * hook on each event to check the timestamp and refresh the display if
 212  * necessary
 213  */
 214 enum bt_cb_ret print_timestamp(struct bt_ctf_event *call_data, void *private_data)
 215 {
 216         unsigned long timestamp;
 217         uint64_t delta;
 218         struct tm start;
 219         uint64_t ts_nsec_start;
 220         int pid, cpu_id, tid;
 221         const struct bt_definition *scope;
 222         const char *hostname, *procname;
 223
 224         timestamp = bt_ctf_get_timestamp(call_data);
 225
 226         /* can happen in network live when tracing is idle */
 227         if (timestamp < last_event_ts)
 228                 goto end_stop;
 229
 230         last_event_ts = timestamp;
 231
 232         start = format_timestamp(timestamp);
 233         ts_nsec_start = timestamp % NSEC_PER_SEC;
 234
 235         pid = get_context_pid(call_data);
 236         if (pid == -1ULL && opt_tid) {
 237                 goto error;
 238         }
 239
 240         tid = get_context_tid(call_data);
 241
 242         hostname = get_context_hostname(call_data);
 243         if (opt_tid || opt_hostname) {
 244                 if (!lookup_filter_tid_list(pid)) {
 245                         /* To display when a process of ours in getting scheduled in */
 246                         if (strcmp(bt_ctf_event_name(call_data), "sched_switch") == 0) {
 247                                 int next_tid;
 248
 249                                 scope = bt_ctf_get_top_level_scope(call_data,
 250                                                 BT_EVENT_FIELDS);
 251                                 next_tid = bt_ctf_get_int64(bt_ctf_get_field(call_data,
 252                                                         scope, "_next_tid"));
 253                                 if (bt_ctf_field_get_error()) {
 254                                         fprintf(stderr, "Missing next_tid field\n");
 255                                         goto error;
 256                                 }
 257                                 if (!lookup_filter_tid_list(next_tid)) {
 258                                         goto end;
 259                                 }
 260                         } else {
 261                                 goto end;
 262                         }
 263                 }
 264         }
 265
 266         cpu_id = get_cpu_id(call_data);
 267         procname = get_context_comm(call_data);
 268         if (prev_ts == 0)
 269                 prev_ts = timestamp;
 270         delta = timestamp - prev_ts;
 271         prev_ts = timestamp;
 272
 273         if (hostname) {
 274                 printf("%02d:%02d:%02d.%09" PRIu64 " (+%" PRIu64 ".%09" PRIu64 ") (%s) "
 275                                 "(cpu %d) [%s (%d/%d)] %s (",
 276                                 start.tm_hour, start.tm_min, start.tm_sec,
 277                                 ts_nsec_start, delta / NSEC_PER_SEC,
 278                                 delta % NSEC_PER_SEC, hostname, cpu_id,
 279                                 procname, pid, tid,
 280                                 bt_ctf_event_name(call_data));
 281         } else {
 282                 printf("%02d:%02d:%02d.%09" PRIu64 " (+%" PRIu64 ".%09" PRIu64 ") "
 283                                 "(cpu %d) [%s (%d/%d)] %s (",
 284                                 start.tm_hour, start.tm_min, start.tm_sec,
 285                                 ts_nsec_start, delta  / NSEC_PER_SEC,
 286                                 delta % NSEC_PER_SEC, cpu_id, procname, pid,
 287                                 tid, bt_ctf_event_name(call_data));
 288         }
 289         print_fields(call_data);
 290         printf(")\n");
 291
 292 end:
 293         return BT_CB_OK;
 294 error:
 295         return BT_CB_ERROR_STOP;
 296 end_stop:
 297         return BT_CB_OK_STOP;
 298 }
 299
 300 enum bt_cb_ret handle_kprobes(struct bt_ctf_event *call_data, void *private_data)
 301 {
 302         int i;
 303         struct kprobes *kprobe;
 304
 305         /* for kprobes */
 306         for (i = 0; i < lttngtop.kprobes_table->len; i++) {
 307                 kprobe = g_ptr_array_index(lttngtop.kprobes_table, i);
 308                 if (strcmp(bt_ctf_event_name(call_data), kprobe->probe_name) == 0) {
 309                         kprobe->count++;
 310                 }
 311         }
 312
 313         return BT_CB_OK;
 314 }
 315
 316 /*
 317  * hook on each event to check the timestamp and refresh the display if
 318  * necessary
 319  */
 320 enum bt_cb_ret check_timestamp(struct bt_ctf_event *call_data, void *private_data)
 321 {
 322         unsigned long timestamp;
 323
 324         timestamp = bt_ctf_get_timestamp(call_data);
 325         if (timestamp == -1ULL)
 326                 goto error;
 327
 328         /* can happen in network live when tracing is idle */
 329         if (timestamp < last_event_ts)
 330                 goto end_stop;
 331
 332         last_event_ts = timestamp;
 333
 334         if (last_display_update == 0)
 335                 last_display_update = timestamp;
 336
 337         if (timestamp - last_display_update >= refresh_display) {
 338                 sem_wait(&goodtoupdate);
 339                 g_ptr_array_add(copies, get_copy_lttngtop(last_display_update,
 340                                         timestamp));
 341                 sem_post(&goodtodisplay);
 342                 sem_post(&bootstrap);
 343                 last_display_update = timestamp;
 344         }
 345         return BT_CB_OK;
 346
 347 error:
 348         fprintf(stderr, "check_timestamp callback error\n");
 349         return BT_CB_ERROR_STOP;
 350
 351 end_stop:
 352         return BT_CB_OK_STOP;
 353 }
 354
 355 /*
 356  * get_perf_counter : get or create and return a perf_counter struct for
 357  * either a process or a cpu (only one of the 2 parameters mandatory)
 358  */
 359 struct perfcounter *get_perf_counter(const char *name, struct processtop *proc,
 360                 struct cputime *cpu)
 361 {
 362         struct perfcounter *ret;
 363         GHashTable *table;
 364
 365         if (proc)
 366                 table = proc->perf;
 367         else if (cpu)
 368                 table = cpu->perf;
 369         else
 370                 goto error;
 371
 372         ret = g_hash_table_lookup(table, (gpointer) name);
 373         if (ret)
 374                 goto end;
 375
 376         ret = g_new0(struct perfcounter, 1);
 377         /* by default, make it visible in the UI */
 378         ret->visible = 1;
 379         g_hash_table_insert(table, (gpointer) strdup(name), ret);
 380
 381 end:
 382         return ret;
 383
 384 error:
 385         return NULL;
 386 }
 387
 388 void update_perf_value(struct processtop *proc, struct cputime *cpu,
 389                 const char *name, int value)
 390 {
 391         struct perfcounter *cpu_perf, *process_perf;
 392
 393         cpu_perf = get_perf_counter(name, NULL, cpu);
 394         if (cpu_perf->count < value) {
 395                 process_perf = get_perf_counter(name, proc, NULL);
 396                 process_perf->count += value - cpu_perf->count;
 397                 cpu_perf->count = value;
 398         }
 399 }
 400
 401 void extract_perf_counter_scope(const struct bt_ctf_event *event,
 402                 const struct bt_definition *scope,
 403                 struct processtop *proc,
 404                 struct cputime *cpu)
 405 {
 406         struct bt_definition const * const *list = NULL;
 407         const struct bt_definition *field;
 408         unsigned int count;
 409         struct perfcounter *perfcounter;
 410         GHashTableIter iter;
 411         gpointer key;
 412         int ret;
 413
 414         if (!scope)
 415                 goto end;
 416
 417         ret = bt_ctf_get_field_list(event, scope, &list, &count);
 418         if (ret < 0)
 419                 goto end;
 420
 421         if (count == 0)
 422                 goto end;
 423
 424         g_hash_table_iter_init(&iter, global_perf_liszt);
 425         while (g_hash_table_iter_next (&iter, &key, (gpointer) &perfcounter)) {
 426                 field = bt_ctf_get_field(event, scope, (char *) key);
 427                 if (field) {
 428                         int value = bt_ctf_get_uint64(field);
 429                         if (bt_ctf_field_get_error())
 430                                 continue;
 431                         update_perf_value(proc, cpu, (char *) key, value);
 432                 }
 433         }
 434
 435 end:
 436         return;
 437 }
 438
 439 void update_perf_counter(struct processtop *proc, const struct bt_ctf_event *event)
 440 {
 441         struct cputime *cpu;
 442         const struct bt_definition *scope;
 443
 444         cpu = get_cpu(get_cpu_id(event));
 445
 446         scope = bt_ctf_get_top_level_scope(event, BT_STREAM_EVENT_CONTEXT);
 447         extract_perf_counter_scope(event, scope, proc, cpu);
 448
 449         scope = bt_ctf_get_top_level_scope(event, BT_STREAM_PACKET_CONTEXT);
 450         extract_perf_counter_scope(event, scope, proc, cpu);
 451
 452         scope = bt_ctf_get_top_level_scope(event, BT_EVENT_CONTEXT);
 453         extract_perf_counter_scope(event, scope, proc, cpu);
 454 }
 455
 456 enum bt_cb_ret fix_process_table(struct bt_ctf_event *call_data,
 457                 void *private_data)
 458 {
 459         int pid, tid, ppid, vpid, vtid, vppid;
 460         char *comm, *hostname;
 461         struct processtop *parent, *child;
 462         unsigned long timestamp;
 463
 464         timestamp = bt_ctf_get_timestamp(call_data);
 465         if (timestamp == -1ULL)
 466                 goto error;
 467
 468         pid = get_context_pid(call_data);
 469         if (pid == -1ULL) {
 470                 goto error;
 471         }
 472
 473         tid = get_context_tid(call_data);
 474         if (tid == -1ULL) {
 475                 goto error;
 476         }
 477         ppid = get_context_ppid(call_data);
 478         if (ppid == -1ULL) {
 479                 goto error;
 480         }
 481         vpid = get_context_vpid(call_data);
 482         if (pid == -1ULL) {
 483                 vpid = -1;
 484         }
 485         vtid = get_context_vtid(call_data);
 486         if (tid == -1ULL) {
 487                 vtid = -1;
 488         }
 489         vppid = get_context_vppid(call_data);
 490         if (ppid == -1ULL) {
 491                 vppid = -1;
 492         }
 493         comm = get_context_comm(call_data);
 494         if (!comm) {
 495                 goto error;
 496         }
 497         /* optional */
 498         hostname = get_context_hostname(call_data);
 499
 500         /* find or create the current process */
 501         child = find_process_tid(&lttngtop, tid, comm);
 502         if (!child)
 503                 child = add_proc(&lttngtop, tid, comm, timestamp, hostname);
 504         if (!child)
 505                 goto end;
 506         update_proc(child, pid, tid, ppid, vpid, vtid, vppid, comm, hostname);
 507
 508         if (pid != tid) {
 509                 /* find or create the parent */
 510                 parent = find_process_tid(&lttngtop, pid, comm);
 511                 if (!parent) {
 512                         parent = add_proc(&lttngtop, pid, comm, timestamp, hostname);
 513                         if (parent)
 514                                 parent->pid = pid;
 515                 }
 516
 517                 /* attach the parent to the current process */
 518                 child->threadparent = parent;
 519                 add_thread(parent, child);
 520         }
 521
 522         update_perf_counter(child, call_data);
 523
 524 end:
 525         return BT_CB_OK;
 526
 527 error:
 528         return BT_CB_ERROR_STOP;
 529 }
 530
 531 void init_lttngtop()
 532 {
 533         copies = g_ptr_array_new();
 534         global_perf_liszt = g_hash_table_new(g_str_hash, g_str_equal);
 535         global_filter_list = g_hash_table_new(g_str_hash, g_str_equal);
 536         global_host_list = g_hash_table_new(g_str_hash, g_str_equal);
 537
 538         sem_init(&goodtodisplay, 0, 0);
 539         sem_init(&goodtoupdate, 0, 1);
 540         sem_init(&timer, 0, 1);
 541         sem_init(&bootstrap, 0, 0);
 542         sem_init(&pause_sem, 0, 1);
 543         sem_init(&end_trace_sem, 0, 0);
 544
 545         reset_global_counters();
 546         lttngtop.nbproc = 0;
 547         lttngtop.nbthreads = 0;
 548         lttngtop.nbfiles = 0;
 549
 550         lttngtop.process_hash_table = g_hash_table_new(g_direct_hash,
 551                         g_direct_equal);
 552         lttngtop.process_table = g_ptr_array_new();
 553         lttngtop.files_table = g_ptr_array_new();
 554         lttngtop.cpu_table = g_ptr_array_new();
 555
 556         toggle_filter = -1;
 557 }
 558
 559 void usage(FILE *fp)
 560 {
 561         fprintf(fp, "LTTngTop %s\n\n", VERSION);
 562         fprintf(fp, "Usage : lttngtop [OPTIONS] TRACE\n");
 563         fprintf(fp, "  TRACE                    Path to the trace to analyse (-r for network live tracing, nothing for mmap live streaming)\n");
 564         fprintf(fp, "  -h, --help               This help message\n");
 565         fprintf(fp, "  -t, --textdump           Display live events in text-only\n");
 566         fprintf(fp, "  -p, --pid                Comma-separated list of PIDs to display\n");
 567         fprintf(fp, "  -f, --child              Follow threads associated with selected PIDs\n");
 568         fprintf(fp, "  -n, --hostname           Comma-separated list of hostnames to display (require hostname context in trace)\n");
 569         fprintf(fp, "  -k, --kprobes            Comma-separated list of kprobes to insert (same format as lttng enable-event)\n");
 570         fprintf(fp, "  -r, --relay-hostname     Network live streaming : hostname of the lttng-relayd (default port)\n");
 571         fprintf(fp, "  -b, --begin              Network live streaming : read the trace for the beginning of the recording\n");
 572 }
 573
 574 /*
 575  * Parse probe options.
 576  * Shamelessly stolen from lttng-tools :
 577  * src/bin/lttng/commands/enable_events.c
 578  */
 579 static struct kprobes *parse_probe_opts(char *opt)
 580 {
 581         char s_hex[19];
 582         char name[LTTNG_SYMBOL_NAME_LEN];
 583         struct kprobes *kprobe;
 584         int ret;
 585
 586         /*
 587         kprobe->probe_addr = 0;
 588         kprobe->probe_offset = 0;
 589         asprintf(&kprobe->probe_name, "probe_sys_open");
 590         asprintf(&kprobe->symbol_name, "sys_open");
 591         */
 592
 593         if (opt == NULL) {
 594                 kprobe = NULL;
 595                 goto end;
 596         }
 597
 598         kprobe = g_new0(struct kprobes, 1);
 599
 600         /* Check for symbol+offset */
 601         ret = sscanf(opt, "%[^'+']+%s", name, s_hex);
 602         if (ret == 2) {
 603                 ret = asprintf(&kprobe->probe_name, "probe_%s", name);
 604                 ret = asprintf(&kprobe->symbol_name, "%s", name);
 605
 606                 if (strlen(s_hex) == 0) {
 607                         fprintf(stderr, "Invalid probe offset %s", s_hex);
 608                         ret = -1;
 609                         goto end;
 610                 }
 611                 kprobe->probe_offset = strtoul(s_hex, NULL, 0);
 612                 kprobe->probe_addr = 0;
 613                 goto end;
 614         }
 615
 616         /* Check for symbol */
 617         if (isalpha(name[0])) {
 618                 ret = sscanf(opt, "%s", name);
 619                 if (ret == 1) {
 620                         ret = asprintf(&kprobe->probe_name, "probe_%s", name);
 621                         ret = asprintf(&kprobe->symbol_name, "%s", name);
 622                         kprobe->probe_offset = 0;
 623                         kprobe->probe_addr = 0;
 624                         goto end;
 625                 }
 626         }
 627
 628         /* Check for address */
 629         ret = sscanf(opt, "%s", s_hex);
 630         if (ret > 0) {
 631                 if (strlen(s_hex) == 0) {
 632                         fprintf(stderr, "Invalid probe address %s", s_hex);
 633                         ret = -1;
 634                         goto end;
 635                 }
 636                 ret = asprintf(&kprobe->probe_name, "probe_%s", s_hex);
 637                 kprobe->probe_offset = 0;
 638                 kprobe->probe_addr = strtoul(s_hex, NULL, 0);
 639                 goto end;
 640         }
 641
 642         /* No match */
 643         kprobe = NULL;
 644
 645 end:
 646         return kprobe;
 647 }
 648
 649 /*
 650  * Return 0 if caller should continue, < 0 if caller should return
 651  * error, > 0 if caller should exit without reporting error.
 652  */
 653 static int parse_options(int argc, char **argv)
 654 {
 655         poptContext pc;
 656         int opt, ret = 0;
 657         char *tmp_str;
 658         int *tid;
 659
 660         remote_live = 0;
 661
 662         pc = poptGetContext(NULL, argc, (const char **) argv, long_options, 0);
 663         poptReadDefaultConfig(pc, 0);
 664
 665         while ((opt = poptGetNextOpt(pc)) != -1) {
 666                 switch (opt) {
 667                         case OPT_HELP:
 668                                 usage(stdout);
 669                                 ret = 1;    /* exit cleanly */
 670                                 goto end;
 671                         case OPT_TEXTDUMP:
 672                                 opt_textdump = 1;
 673                                 break;
 674                         case OPT_CHILD:
 675                                 opt_child = 1;
 676                                 break;
 677                         case OPT_PID:
 678                                 toggle_filter = 1;
 679                                 tid_filter_list = g_hash_table_new(g_str_hash,
 680                                                 g_str_equal);
 681                                 tmp_str = strtok(opt_tid, ",");
 682                                 while (tmp_str) {
 683                                         tid = malloc(sizeof(int));
 684                                         *tid = atoi(tmp_str);
 685                                         g_hash_table_insert(tid_filter_list,
 686                                                         (gpointer) tid, tid);
 687                                         tmp_str = strtok(NULL, ",");
 688                                 }
 689                                 break;
 690                         case OPT_BEGIN:
 691                                 /* start reading the live trace from the beginning */
 692                                 opt_begin = 1;
 693                                 break;
 694                         case OPT_HOSTNAME:
 695                                 toggle_filter = 1;
 696                                 tmp_str = strtok(opt_hostname, ",");
 697                                 while (tmp_str) {
 698                                         add_hostname_list(tmp_str, 1);
 699                                         tmp_str = strtok(NULL, ",");
 700                                 }
 701                                 break;
 702                         case OPT_RELAY_HOSTNAME:
 703                                 remote_live = 1;
 704                                 break;
 705                         case OPT_KPROBES:
 706                                 lttngtop.kprobes_table = g_ptr_array_new();
 707                                 tmp_str = strtok(opt_kprobes, ",");
 708                                 while (tmp_str) {
 709                                         struct kprobes *kprobe;
 710
 711                                         kprobe = parse_probe_opts(tmp_str);
 712                                         if (kprobe) {
 713                                                 g_ptr_array_add(
 714                                                         lttngtop.kprobes_table,
 715                                                         kprobe);
 716                                         } else {
 717                                                 ret = -EINVAL;
 718                                                 goto end;
 719                                         }
 720                                         tmp_str = strtok(NULL, ",");
 721                                 }
 722                                 break;
 723                         default:
 724                                 ret = -EINVAL;
 725                                 goto end;
 726                 }
 727         }
 728
 729         opt_input_path = poptGetArg(pc);
 730
 731 end:
 732         if (pc) {
 733                 poptFreeContext(pc);
 734         }
 735         return ret;
 736 }
 737
 738 void iter_trace(struct bt_context *bt_ctx)
 739 {
 740         struct bt_ctf_iter *iter;
 741         struct bt_iter_pos begin_pos;
 742         struct kprobes *kprobe;
 743         const struct bt_ctf_event *event;
 744         int i;
 745         int ret = 0;
 746
 747         begin_pos.type = BT_SEEK_BEGIN;
 748         iter = bt_ctf_iter_create(bt_ctx, &begin_pos, NULL);
 749
 750         /* at each event, verify the status of the process table */
 751         bt_ctf_iter_add_callback(iter, 0, NULL, 0,
 752                         fix_process_table,
 753                         NULL, NULL, NULL);
 754         /* to handle the follow child option */
 755         bt_ctf_iter_add_callback(iter,
 756                         g_quark_from_static_string("sched_process_fork"),
 757                         NULL, 0, handle_sched_process_fork, NULL, NULL, NULL);
 758         if (opt_textdump) {
 759                 bt_ctf_iter_add_callback(iter, 0, NULL, 0,
 760                                 print_timestamp,
 761                                 NULL, NULL, NULL);
 762         } else {
 763                 /* at each event check if we need to refresh */
 764                 bt_ctf_iter_add_callback(iter, 0, NULL, 0,
 765                                 check_timestamp,
 766                                 NULL, NULL, NULL);
 767                 /* to handle the scheduling events */
 768                 bt_ctf_iter_add_callback(iter,
 769                                 g_quark_from_static_string("sched_switch"),
 770                                 NULL, 0, handle_sched_switch, NULL, NULL, NULL);
 771                 /* to clean up the process table */
 772                 bt_ctf_iter_add_callback(iter,
 773                                 g_quark_from_static_string("sched_process_free"),
 774                                 NULL, 0, handle_sched_process_free, NULL, NULL, NULL);
 775                 /* to get all the process from the statedumps */
 776                 bt_ctf_iter_add_callback(iter,
 777                                 g_quark_from_static_string(
 778                                         "lttng_statedump_process_state"),
 779                                 NULL, 0, handle_statedump_process_state,
 780                                 NULL, NULL, NULL);
 781
 782                 /* for IO top */
 783                 bt_ctf_iter_add_callback(iter,
 784                                 g_quark_from_static_string("exit_syscall"),
 785                                 NULL, 0, handle_exit_syscall, NULL, NULL, NULL);
 786                 bt_ctf_iter_add_callback(iter,
 787                                 g_quark_from_static_string("sys_write"),
 788                                 NULL, 0, handle_sys_write, NULL, NULL, NULL);
 789                 bt_ctf_iter_add_callback(iter,
 790                                 g_quark_from_static_string("sys_read"),
 791                                 NULL, 0, handle_sys_read, NULL, NULL, NULL);
 792                 bt_ctf_iter_add_callback(iter,
 793                                 g_quark_from_static_string("sys_open"),
 794                                 NULL, 0, handle_sys_open, NULL, NULL, NULL);
 795                 bt_ctf_iter_add_callback(iter,
 796                                 g_quark_from_static_string("sys_close"),
 797                                 NULL, 0, handle_sys_close, NULL, NULL, NULL);
 798                 bt_ctf_iter_add_callback(iter,
 799                                 g_quark_from_static_string(
 800                                         "lttng_statedump_file_descriptor"),
 801                                 NULL, 0, handle_statedump_file_descriptor,
 802                                 NULL, NULL, NULL);
 803
 804                 /* for kprobes */
 805                 if (lttngtop.kprobes_table) {
 806                         for (i = 0; i < lttngtop.kprobes_table->len; i++) {
 807                                 kprobe = g_ptr_array_index(lttngtop.kprobes_table, i);
 808                                 bt_ctf_iter_add_callback(iter,
 809                                                 g_quark_from_static_string(
 810                                                         kprobe->probe_name),
 811                                                 NULL, 0, handle_kprobes,
 812                                                 NULL, NULL, NULL);
 813                         }
 814                 }
 815         }
 816
 817         while ((event = bt_ctf_iter_read_event(iter)) != NULL) {
 818                 if (quit || reload_trace)
 819                         goto end_iter;
 820                 ret = bt_iter_next(bt_ctf_get_iter(iter));
 821                 if (ret < 0)
 822                         goto end_iter;
 823         }
 824
 825         /* block until quit, we reached the end of the trace */
 826         sem_wait(&end_trace_sem);
 827
 828 end_iter:
 829         bt_ctf_iter_destroy(iter);
 830 }
 831
 832 /*
 833  * bt_context_add_traces_recursive: Open a trace recursively
 834  * (copied from BSD code in converter/babeltrace.c)
 835  *
 836  * Find each trace present in the subdirectory starting from the given
 837  * path, and add them to the context. The packet_seek parameter can be
 838  * NULL: this specify to use the default format packet_seek.
 839  *
 840  * Return: 0 on success, nonzero on failure.
 841  * Unable to open toplevel: failure.
 842  * Unable to open some subdirectory or file: warn and continue;
 843  */
 844 int bt_context_add_traces_recursive(struct bt_context *ctx, const char *path,
 845                 const char *format_str,
 846                 void (*packet_seek)(struct bt_stream_pos *pos,
 847                         size_t offset, int whence))
 848 {
 849         FTS *tree;
 850         FTSENT *node;
 851         GArray *trace_ids;
 852         char lpath[PATH_MAX];
 853         char * const paths[2] = { lpath, NULL };
 854         int ret = -1;
 855
 856         if ((strncmp(path, NET4_URL_PREFIX, sizeof(NET4_URL_PREFIX) - 1)) == 0 ||
 857                         (strncmp(path, NET6_URL_PREFIX, sizeof(NET6_URL_PREFIX) - 1)) == 0 ||
 858                         (strncmp(path, NET_URL_PREFIX, sizeof(NET_URL_PREFIX) - 1)) == 0) {
 859                 ret = bt_context_add_trace(ctx,
 860                                 path, format_str, packet_seek, NULL, NULL);
 861                 if (ret < 0) {
 862                         fprintf(stderr, "[warning] [Context] cannot open trace \"%s\" "
 863                                         "for reading.\n", path);
 864                         /* Allow to skip erroneous traces. */
 865                         ret = 1;        /* partial error */
 866                 }
 867                 return ret;
 868         }
 869         /*
 870          * Need to copy path, because fts_open can change it.
 871          * It is the pointer array, not the strings, that are constant.
 872          */
 873         strncpy(lpath, path, PATH_MAX);
 874         lpath[PATH_MAX - 1] = '\0';
 875
 876         tree = fts_open(paths, FTS_NOCHDIR | FTS_LOGICAL, 0);
 877         if (tree == NULL) {
 878                 fprintf(stderr, "[error] [Context] Cannot traverse \"%s\" for reading.\n",
 879                                 path);
 880                 return -EINVAL;
 881         }
 882
 883         trace_ids = g_array_new(FALSE, TRUE, sizeof(int));
 884
 885         while ((node = fts_read(tree))) {
 886                 int dirfd, metafd;
 887
 888                 if (!(node->fts_info & FTS_D))
 889                         continue;
 890
 891                 dirfd = open(node->fts_accpath, 0);
 892                 if (dirfd < 0) {
 893                         fprintf(stderr, "[error] [Context] Unable to open trace "
 894                                 "directory file descriptor.\n");
 895                         ret = dirfd;
 896                         goto error;
 897                 }
 898                 metafd = openat(dirfd, "metadata", O_RDONLY);
 899                 if (metafd < 0) {
 900                         close(dirfd);
 901                         continue;
 902                 } else {
 903                         int trace_id;
 904
 905                         ret = close(metafd);
 906                         if (ret < 0) {
 907                                 perror("close");
 908                                 goto error;
 909                         }
 910                         ret = close(dirfd);
 911                         if (ret < 0) {
 912                                 perror("close");
 913                                 goto error;
 914                         }
 915
 916                         trace_id = bt_context_add_trace(ctx,
 917                                 node->fts_accpath, format_str,
 918                                 packet_seek, NULL, NULL);
 919                         if (trace_id < 0) {
 920                                 fprintf(stderr, "[warning] [Context] opening trace \"%s\" from %s "
 921                                         "for reading.\n", node->fts_accpath, path);
 922                                 /* Allow to skip erroneous traces. */
 923                                 continue;
 924                         }
 925                         g_array_append_val(trace_ids, trace_id);
 926                 }
 927         }
 928
 929         g_array_free(trace_ids, TRUE);
 930         return ret;
 931
 932 error:
 933         return ret;
 934 }
 935
 936 static int check_field_requirements(const struct bt_ctf_field_decl *const * field_list,
 937                 int field_cnt, int *tid_check, int *pid_check,
 938                 int *procname_check, int *ppid_check)
 939 {
 940         int j;
 941         struct perfcounter *global;
 942         const char *name;
 943
 944         for (j = 0; j < field_cnt; j++) {
 945                 name = bt_ctf_get_decl_field_name(field_list[j]);
 946                 if (*tid_check == 0) {
 947                         if (strncmp(name, "tid", 3) == 0)
 948                                 (*tid_check)++;
 949                 }
 950                 if (*pid_check == 0) {
 951                         if (strncmp(name, "pid", 3) == 0)
 952                                 (*pid_check)++;
 953                 }
 954                 if (*ppid_check == 0) {
 955                         if (strncmp(name, "ppid", 4) == 0)
 956                                 (*ppid_check)++;
 957                 }
 958                 if (*procname_check == 0) {
 959                         if (strncmp(name, "procname", 8) == 0)
 960                                 (*procname_check)++;
 961                 }
 962                 if (strncmp(name, "perf_", 5) == 0) {
 963                         global = g_hash_table_lookup(global_perf_liszt, (gpointer) name);
 964                         if (!global) {
 965                                 global = g_new0(struct perfcounter, 1);
 966                                 /* by default, sort on the first perf context */
 967                                 if (g_hash_table_size(global_perf_liszt) == 0)
 968                                         global->sort = 1;
 969                                 global->visible = 1;
 970                                 g_hash_table_insert(global_perf_liszt, (gpointer) strdup(name), global);
 971                         }
 972                 }
 973         }
 974
 975         if (*tid_check == 1 && *pid_check == 1 && *ppid_check == 1 &&
 976                         *procname_check == 1)
 977                 return 0;
 978
 979         return -1;
 980 }
 981
 982 /*
 983  * check_requirements: check if the required context informations are available
 984  *
 985  * If each mandatory context information is available for at least in one
 986  * event, return 0 otherwise return -1.
 987  */
 988 int check_requirements(struct bt_context *ctx)
 989 {
 990         unsigned int i, evt_cnt, field_cnt;
 991         struct bt_ctf_event_decl *const * evt_list;
 992         const struct bt_ctf_field_decl *const * field_list;
 993         int tid_check = 0;
 994         int pid_check = 0;
 995         int procname_check = 0;
 996         int ppid_check = 0;
 997         int ret = 0;
 998
 999         ret = bt_ctf_get_event_decl_list(0, ctx, &evt_list, &evt_cnt);
1000         if (ret < 0) {
1001                 goto end;
1002         }
1003
1004         for (i = 0; i < evt_cnt; i++) {
1005                 bt_ctf_get_decl_fields(evt_list[i], BT_STREAM_EVENT_CONTEXT,
1006                                 &field_list, &field_cnt);
1007                 ret = check_field_requirements(field_list, field_cnt,
1008                                 &tid_check, &pid_check, &procname_check,
1009                                 &ppid_check);
1010
1011                 bt_ctf_get_decl_fields(evt_list[i], BT_EVENT_CONTEXT,
1012                                 &field_list, &field_cnt);
1013                 ret = check_field_requirements(field_list, field_cnt,
1014                                 &tid_check, &pid_check, &procname_check,
1015                                 &ppid_check);
1016
1017                 bt_ctf_get_decl_fields(evt_list[i], BT_STREAM_PACKET_CONTEXT,
1018                                 &field_list, &field_cnt);
1019                 ret = check_field_requirements(field_list, field_cnt,
1020                                 &tid_check, &pid_check, &procname_check,
1021                                 &ppid_check);
1022         }
1023
1024         if (tid_check == 0) {
1025                 ret = -1;
1026                 fprintf(stderr, "[error] missing tid context information\n");
1027         }
1028         if (pid_check == 0) {
1029                 ret = -1;
1030                 fprintf(stderr, "[error] missing pid context information\n");
1031         }
1032         if (ppid_check == 0) {
1033                 ret = -1;
1034                 fprintf(stderr, "[error] missing ppid context information\n");
1035         }
1036         if (procname_check == 0) {
1037                 ret = -1;
1038                 fprintf(stderr, "[error] missing procname context information\n");
1039         }
1040
1041 end:
1042         return ret;
1043 }
1044
1045 int main(int argc, char **argv)
1046 {
1047         int ret;
1048         struct bt_context *bt_ctx = NULL;
1049
1050         init_lttngtop();
1051         ret = parse_options(argc, argv);
1052         if (ret < 0) {
1053                 fprintf(stdout, "Error parsing options.\n\n");
1054                 usage(stdout);
1055                 exit(EXIT_FAILURE);
1056         } else if (ret > 0) {
1057                 exit(EXIT_SUCCESS);
1058         }
1059
1060         if (!opt_input_path && !remote_live) {
1061                 /* mmap live */
1062 #ifdef LTTNGTOP_MMAP_LIVE
1063                 if (opt_textdump) {
1064                         signal(SIGTERM, handle_textdump_sigterm);
1065                         signal(SIGINT, handle_textdump_sigterm);
1066                 }
1067                 mmap_live_loop(bt_ctx);
1068                 pthread_join(timer_thread, NULL);
1069                 quit = 1;
1070                 pthread_join(display_thread, NULL);
1071
1072                 lttng_stop_tracing("test");
1073                 lttng_destroy_session("test");
1074
1075                 goto end;
1076 #else
1077                 fprintf(stderr, "[ERROR] Mmap live support not compiled, specify a "
1078                                 "trace directory or -r <relayd hostname/IP>\n");
1079                 usage(stdout);
1080                 ret = -1;
1081                 goto end;
1082 #endif /* LTTNGTOP_MMAP_LIVE */
1083         } else if (!opt_input_path && remote_live) {
1084                 /* network live */
1085 #if 0
1086                 ret = setup_network_live(opt_relay_hostname, opt_begin);
1087                 if (ret < 0) {
1088                         goto end;
1089                 }
1090
1091                 ret = open_trace(&bt_ctx);
1092                 if (ret < 0) {
1093                         goto end;
1094                 }
1095 #endif
1096
1097                 bt_ctx = bt_context_create();
1098                 ret = bt_context_add_traces_recursive(bt_ctx, opt_relay_hostname,
1099                                 "lttng-live", NULL);
1100                 if (ret < 0) {
1101                         fprintf(stderr, "[error] Opening the trace\n");
1102                         goto end;
1103                 }
1104         } else {
1105                 //init_lttngtop();
1106
1107                 bt_ctx = bt_context_create();
1108                 ret = bt_context_add_traces_recursive(bt_ctx, opt_input_path, "ctf", NULL);
1109                 if (ret < 0) {
1110                         fprintf(stderr, "[error] Opening the trace\n");
1111                         goto end;
1112                 }
1113
1114                 ret = check_requirements(bt_ctx);
1115                 if (ret < 0) {
1116                         fprintf(stderr, "[error] some mandatory contexts "
1117                                         "were missing, exiting.\n");
1118                         goto end;
1119                 }
1120
1121                 if (!opt_textdump) {
1122                         pthread_create(&display_thread, NULL, ncurses_display,
1123                                         (void *) NULL);
1124                         pthread_create(&timer_thread, NULL, refresh_thread,
1125                                         (void *) NULL);
1126                 }
1127
1128                 iter_trace(bt_ctx);
1129         }
1130
1131
1132         pthread_join(display_thread, NULL);
1133         quit = 1;
1134         pthread_join(timer_thread, NULL);
1135
1136         ret = 0;
1137
1138 end:
1139         if (bt_ctx)
1140                 bt_context_put(bt_ctx);
1141
1142         return ret;
1143 }