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 int last_textdump_print_newline = 1;
  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         struct tm start;
 218         uint64_t ts_nsec_start;
 219         int pid, cpu_id;
 220         int64_t syscall_ret;
 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         hostname = get_context_hostname(call_data);
 241         if (opt_tid || opt_hostname)
 242                 if (!lookup_filter_tid_list(pid))
 243                         goto end;
 244
 245         cpu_id = get_cpu_id(call_data);
 246         procname = get_context_comm(call_data);
 247
 248         if ((strcmp(bt_ctf_event_name(call_data), "exit_syscall") == 0) &&
 249                         !last_textdump_print_newline) {
 250                 scope = bt_ctf_get_top_level_scope(call_data,
 251                                 BT_EVENT_FIELDS);
 252                 syscall_ret = bt_ctf_get_int64(bt_ctf_get_field(call_data,
 253                                         scope, "_ret"));
 254                 printf("= %ld\n", syscall_ret);
 255                 last_textdump_print_newline = 1;
 256         } else {
 257                 /* we might have lost the exit_syscall event, so need to
 258                  * print the newline in this case */
 259                 if (last_textdump_print_newline == 0)
 260                         printf("\n");
 261                 printf("%02d:%02d:%02d.%09" PRIu64 " (%s) (cpu %d) [%s (%d)] %s (",
 262                                 start.tm_hour, start.tm_min, start.tm_sec,
 263                                 ts_nsec_start, hostname, cpu_id, procname, pid,
 264                                 bt_ctf_event_name(call_data));
 265                 print_fields(call_data);
 266                 printf(") ");
 267                 if (strncmp(bt_ctf_event_name(call_data), "sys_", 4) != 0) {
 268                         printf("\n");
 269                         last_textdump_print_newline = 1;
 270                 } else {
 271                         last_textdump_print_newline = 0;
 272                 }
 273         }
 274
 275 end:
 276         return BT_CB_OK;
 277 error:
 278         return BT_CB_ERROR_STOP;
 279 end_stop:
 280         return BT_CB_OK_STOP;
 281 }
 282
 283 enum bt_cb_ret handle_kprobes(struct bt_ctf_event *call_data, void *private_data)
 284 {
 285         int i;
 286         struct kprobes *kprobe;
 287
 288         /* for kprobes */
 289         for (i = 0; i < lttngtop.kprobes_table->len; i++) {
 290                 kprobe = g_ptr_array_index(lttngtop.kprobes_table, i);
 291                 if (strcmp(bt_ctf_event_name(call_data), kprobe->probe_name) == 0) {
 292                         kprobe->count++;
 293                 }
 294         }
 295
 296         return BT_CB_OK;
 297 }
 298
 299 /*
 300  * hook on each event to check the timestamp and refresh the display if
 301  * necessary
 302  */
 303 enum bt_cb_ret check_timestamp(struct bt_ctf_event *call_data, void *private_data)
 304 {
 305         unsigned long timestamp;
 306
 307         timestamp = bt_ctf_get_timestamp(call_data);
 308         if (timestamp == -1ULL)
 309                 goto error;
 310
 311         /* can happen in network live when tracing is idle */
 312         if (timestamp < last_event_ts)
 313                 goto end_stop;
 314
 315         last_event_ts = timestamp;
 316
 317         if (last_display_update == 0)
 318                 last_display_update = timestamp;
 319
 320         if (timestamp - last_display_update >= refresh_display) {
 321                 sem_wait(&goodtoupdate);
 322                 g_ptr_array_add(copies, get_copy_lttngtop(last_display_update,
 323                                         timestamp));
 324                 sem_post(&goodtodisplay);
 325                 sem_post(&bootstrap);
 326                 last_display_update = timestamp;
 327         }
 328         return BT_CB_OK;
 329
 330 error:
 331         fprintf(stderr, "check_timestamp callback error\n");
 332         return BT_CB_ERROR_STOP;
 333
 334 end_stop:
 335         return BT_CB_OK_STOP;
 336 }
 337
 338 /*
 339  * get_perf_counter : get or create and return a perf_counter struct for
 340  * either a process or a cpu (only one of the 2 parameters mandatory)
 341  */
 342 struct perfcounter *get_perf_counter(const char *name, struct processtop *proc,
 343                 struct cputime *cpu)
 344 {
 345         struct perfcounter *ret;
 346         GHashTable *table;
 347
 348         if (proc)
 349                 table = proc->perf;
 350         else if (cpu)
 351                 table = cpu->perf;
 352         else
 353                 goto error;
 354
 355         ret = g_hash_table_lookup(table, (gpointer) name);
 356         if (ret)
 357                 goto end;
 358
 359         ret = g_new0(struct perfcounter, 1);
 360         /* by default, make it visible in the UI */
 361         ret->visible = 1;
 362         g_hash_table_insert(table, (gpointer) strdup(name), ret);
 363
 364 end:
 365         return ret;
 366
 367 error:
 368         return NULL;
 369 }
 370
 371 void update_perf_value(struct processtop *proc, struct cputime *cpu,
 372                 const char *name, int value)
 373 {
 374         struct perfcounter *cpu_perf, *process_perf;
 375
 376         cpu_perf = get_perf_counter(name, NULL, cpu);
 377         if (cpu_perf->count < value) {
 378                 process_perf = get_perf_counter(name, proc, NULL);
 379                 process_perf->count += value - cpu_perf->count;
 380                 cpu_perf->count = value;
 381         }
 382 }
 383
 384 void extract_perf_counter_scope(const struct bt_ctf_event *event,
 385                 const struct bt_definition *scope,
 386                 struct processtop *proc,
 387                 struct cputime *cpu)
 388 {
 389         struct bt_definition const * const *list = NULL;
 390         const struct bt_definition *field;
 391         unsigned int count;
 392         struct perfcounter *perfcounter;
 393         GHashTableIter iter;
 394         gpointer key;
 395         int ret;
 396
 397         if (!scope)
 398                 goto end;
 399
 400         ret = bt_ctf_get_field_list(event, scope, &list, &count);
 401         if (ret < 0)
 402                 goto end;
 403
 404         if (count == 0)
 405                 goto end;
 406
 407         g_hash_table_iter_init(&iter, global_perf_liszt);
 408         while (g_hash_table_iter_next (&iter, &key, (gpointer) &perfcounter)) {
 409                 field = bt_ctf_get_field(event, scope, (char *) key);
 410                 if (field) {
 411                         int value = bt_ctf_get_uint64(field);
 412                         if (bt_ctf_field_get_error())
 413                                 continue;
 414                         update_perf_value(proc, cpu, (char *) key, value);
 415                 }
 416         }
 417
 418 end:
 419         return;
 420 }
 421
 422 void update_perf_counter(struct processtop *proc, const struct bt_ctf_event *event)
 423 {
 424         struct cputime *cpu;
 425         const struct bt_definition *scope;
 426
 427         cpu = get_cpu(get_cpu_id(event));
 428
 429         scope = bt_ctf_get_top_level_scope(event, BT_STREAM_EVENT_CONTEXT);
 430         extract_perf_counter_scope(event, scope, proc, cpu);
 431
 432         scope = bt_ctf_get_top_level_scope(event, BT_STREAM_PACKET_CONTEXT);
 433         extract_perf_counter_scope(event, scope, proc, cpu);
 434
 435         scope = bt_ctf_get_top_level_scope(event, BT_EVENT_CONTEXT);
 436         extract_perf_counter_scope(event, scope, proc, cpu);
 437 }
 438
 439 enum bt_cb_ret fix_process_table(struct bt_ctf_event *call_data,
 440                 void *private_data)
 441 {
 442         int pid, tid, ppid, vpid, vtid, vppid;
 443         char *comm, *hostname;
 444         struct processtop *parent, *child;
 445         unsigned long timestamp;
 446
 447         timestamp = bt_ctf_get_timestamp(call_data);
 448         if (timestamp == -1ULL)
 449                 goto error;
 450
 451         pid = get_context_pid(call_data);
 452         if (pid == -1ULL) {
 453                 goto error;
 454         }
 455
 456         tid = get_context_tid(call_data);
 457         if (tid == -1ULL) {
 458                 goto error;
 459         }
 460         ppid = get_context_ppid(call_data);
 461         if (ppid == -1ULL) {
 462                 goto error;
 463         }
 464         vpid = get_context_vpid(call_data);
 465         if (pid == -1ULL) {
 466                 vpid = -1;
 467         }
 468         vtid = get_context_vtid(call_data);
 469         if (tid == -1ULL) {
 470                 vtid = -1;
 471         }
 472         vppid = get_context_vppid(call_data);
 473         if (ppid == -1ULL) {
 474                 vppid = -1;
 475         }
 476         comm = get_context_comm(call_data);
 477         if (!comm) {
 478                 goto error;
 479         }
 480         /* optional */
 481         hostname = get_context_hostname(call_data);
 482
 483         /* find or create the current process */
 484         child = find_process_tid(&lttngtop, tid, comm);
 485         if (!child)
 486                 child = add_proc(&lttngtop, tid, comm, timestamp, hostname);
 487         if (!child)
 488                 goto end;
 489         update_proc(child, pid, tid, ppid, vpid, vtid, vppid, comm, hostname);
 490
 491         if (pid != tid) {
 492                 /* find or create the parent */
 493                 parent = find_process_tid(&lttngtop, pid, comm);
 494                 if (!parent) {
 495                         parent = add_proc(&lttngtop, pid, comm, timestamp, hostname);
 496                         if (parent)
 497                                 parent->pid = pid;
 498                 }
 499
 500                 /* attach the parent to the current process */
 501                 child->threadparent = parent;
 502                 add_thread(parent, child);
 503         }
 504
 505         update_perf_counter(child, call_data);
 506
 507 end:
 508         return BT_CB_OK;
 509
 510 error:
 511         return BT_CB_ERROR_STOP;
 512 }
 513
 514 void init_lttngtop()
 515 {
 516         copies = g_ptr_array_new();
 517         global_perf_liszt = g_hash_table_new(g_str_hash, g_str_equal);
 518         global_filter_list = g_hash_table_new(g_str_hash, g_str_equal);
 519         global_host_list = g_hash_table_new(g_str_hash, g_str_equal);
 520
 521         sem_init(&goodtodisplay, 0, 0);
 522         sem_init(&goodtoupdate, 0, 1);
 523         sem_init(&timer, 0, 1);
 524         sem_init(&bootstrap, 0, 0);
 525         sem_init(&pause_sem, 0, 1);
 526         sem_init(&end_trace_sem, 0, 0);
 527
 528         reset_global_counters();
 529         lttngtop.nbproc = 0;
 530         lttngtop.nbthreads = 0;
 531         lttngtop.nbfiles = 0;
 532
 533         lttngtop.process_hash_table = g_hash_table_new(g_direct_hash,
 534                         g_direct_equal);
 535         lttngtop.process_table = g_ptr_array_new();
 536         lttngtop.files_table = g_ptr_array_new();
 537         lttngtop.cpu_table = g_ptr_array_new();
 538
 539         toggle_filter = -1;
 540 }
 541
 542 void usage(FILE *fp)
 543 {
 544         fprintf(fp, "LTTngTop %s\n\n", VERSION);
 545         fprintf(fp, "Usage : lttngtop [OPTIONS] TRACE\n");
 546         fprintf(fp, "  TRACE                    Path to the trace to analyse (-r for network live tracing, nothing for mmap live streaming)\n");
 547         fprintf(fp, "  -h, --help               This help message\n");
 548         fprintf(fp, "  -t, --textdump           Display live events in text-only\n");
 549         fprintf(fp, "  -p, --pid                Comma-separated list of PIDs to display\n");
 550         fprintf(fp, "  -f, --child              Follow threads associated with selected PIDs\n");
 551         fprintf(fp, "  -n, --hostname           Comma-separated list of hostnames to display (require hostname context in trace)\n");
 552         fprintf(fp, "  -k, --kprobes            Comma-separated list of kprobes to insert (same format as lttng enable-event)\n");
 553         fprintf(fp, "  -r, --relay-hostname     Network live streaming : hostname of the lttng-relayd (default port)\n");
 554         fprintf(fp, "  -b, --begin              Network live streaming : read the trace for the beginning of the recording\n");
 555 }
 556
 557 /*
 558  * Parse probe options.
 559  * Shamelessly stolen from lttng-tools :
 560  * src/bin/lttng/commands/enable_events.c
 561  */
 562 static struct kprobes *parse_probe_opts(char *opt)
 563 {
 564         char s_hex[19];
 565         char name[LTTNG_SYMBOL_NAME_LEN];
 566         struct kprobes *kprobe;
 567         int ret;
 568
 569         /*
 570         kprobe->probe_addr = 0;
 571         kprobe->probe_offset = 0;
 572         asprintf(&kprobe->probe_name, "probe_sys_open");
 573         asprintf(&kprobe->symbol_name, "sys_open");
 574         */
 575
 576         if (opt == NULL) {
 577                 kprobe = NULL;
 578                 goto end;
 579         }
 580
 581         kprobe = g_new0(struct kprobes, 1);
 582
 583         /* Check for symbol+offset */
 584         ret = sscanf(opt, "%[^'+']+%s", name, s_hex);
 585         if (ret == 2) {
 586                 ret = asprintf(&kprobe->probe_name, "probe_%s", name);
 587                 ret = asprintf(&kprobe->symbol_name, "%s", name);
 588
 589                 if (strlen(s_hex) == 0) {
 590                         fprintf(stderr, "Invalid probe offset %s", s_hex);
 591                         ret = -1;
 592                         goto end;
 593                 }
 594                 kprobe->probe_offset = strtoul(s_hex, NULL, 0);
 595                 kprobe->probe_addr = 0;
 596                 goto end;
 597         }
 598
 599         /* Check for symbol */
 600         if (isalpha(name[0])) {
 601                 ret = sscanf(opt, "%s", name);
 602                 if (ret == 1) {
 603                         ret = asprintf(&kprobe->probe_name, "probe_%s", name);
 604                         ret = asprintf(&kprobe->symbol_name, "%s", name);
 605                         kprobe->probe_offset = 0;
 606                         kprobe->probe_addr = 0;
 607                         goto end;
 608                 }
 609         }
 610
 611         /* Check for address */
 612         ret = sscanf(opt, "%s", s_hex);
 613         if (ret > 0) {
 614                 if (strlen(s_hex) == 0) {
 615                         fprintf(stderr, "Invalid probe address %s", s_hex);
 616                         ret = -1;
 617                         goto end;
 618                 }
 619                 ret = asprintf(&kprobe->probe_name, "probe_%s", s_hex);
 620                 kprobe->probe_offset = 0;
 621                 kprobe->probe_addr = strtoul(s_hex, NULL, 0);
 622                 goto end;
 623         }
 624
 625         /* No match */
 626         kprobe = NULL;
 627
 628 end:
 629         return kprobe;
 630 }
 631
 632 /*
 633  * Return 0 if caller should continue, < 0 if caller should return
 634  * error, > 0 if caller should exit without reporting error.
 635  */
 636 static int parse_options(int argc, char **argv)
 637 {
 638         poptContext pc;
 639         int opt, ret = 0;
 640         char *tmp_str;
 641         int *tid;
 642
 643         remote_live = 0;
 644
 645         pc = poptGetContext(NULL, argc, (const char **) argv, long_options, 0);
 646         poptReadDefaultConfig(pc, 0);
 647
 648         while ((opt = poptGetNextOpt(pc)) != -1) {
 649                 switch (opt) {
 650                         case OPT_HELP:
 651                                 usage(stdout);
 652                                 ret = 1;    /* exit cleanly */
 653                                 goto end;
 654                         case OPT_TEXTDUMP:
 655                                 opt_textdump = 1;
 656                                 break;
 657                         case OPT_CHILD:
 658                                 opt_textdump = 1;
 659                                 opt_child = 1;
 660                                 break;
 661                         case OPT_PID:
 662                                 toggle_filter = 1;
 663                                 tid_filter_list = g_hash_table_new(g_str_hash,
 664                                                 g_str_equal);
 665                                 tmp_str = strtok(opt_tid, ",");
 666                                 while (tmp_str) {
 667                                         tid = malloc(sizeof(int));
 668                                         *tid = atoi(tmp_str);
 669                                         g_hash_table_insert(tid_filter_list,
 670                                                         (gpointer) tid, tid);
 671                                         tmp_str = strtok(NULL, ",");
 672                                 }
 673                                 break;
 674                         case OPT_BEGIN:
 675                                 /* start reading the live trace from the beginning */
 676                                 opt_begin = 1;
 677                                 break;
 678                         case OPT_HOSTNAME:
 679                                 toggle_filter = 1;
 680                                 tmp_str = strtok(opt_hostname, ",");
 681                                 while (tmp_str) {
 682                                         add_hostname_list(tmp_str, 1);
 683                                         tmp_str = strtok(NULL, ",");
 684                                 }
 685                                 break;
 686                         case OPT_RELAY_HOSTNAME:
 687                                 remote_live = 1;
 688                                 break;
 689                         case OPT_KPROBES:
 690                                 lttngtop.kprobes_table = g_ptr_array_new();
 691                                 tmp_str = strtok(opt_kprobes, ",");
 692                                 while (tmp_str) {
 693                                         struct kprobes *kprobe;
 694
 695                                         kprobe = parse_probe_opts(tmp_str);
 696                                         if (kprobe) {
 697                                                 g_ptr_array_add(
 698                                                         lttngtop.kprobes_table,
 699                                                         kprobe);
 700                                         } else {
 701                                                 ret = -EINVAL;
 702                                                 goto end;
 703                                         }
 704                                         tmp_str = strtok(NULL, ",");
 705                                 }
 706                                 break;
 707                         default:
 708                                 ret = -EINVAL;
 709                                 goto end;
 710                 }
 711         }
 712
 713         opt_input_path = poptGetArg(pc);
 714
 715 end:
 716         if (pc) {
 717                 poptFreeContext(pc);
 718         }
 719         return ret;
 720 }
 721
 722 void iter_trace(struct bt_context *bt_ctx)
 723 {
 724         struct bt_ctf_iter *iter;
 725         struct bt_iter_pos begin_pos;
 726         struct kprobes *kprobe;
 727         const struct bt_ctf_event *event;
 728         int i;
 729         int ret = 0;
 730
 731         begin_pos.type = BT_SEEK_BEGIN;
 732         iter = bt_ctf_iter_create(bt_ctx, &begin_pos, NULL);
 733
 734         /* at each event, verify the status of the process table */
 735         bt_ctf_iter_add_callback(iter, 0, NULL, 0,
 736                         fix_process_table,
 737                         NULL, NULL, NULL);
 738         if (opt_textdump) {
 739                 bt_ctf_iter_add_callback(iter, 0, NULL, 0,
 740                                 print_timestamp,
 741                                 NULL, NULL, NULL);
 742         } else {
 743                 /* at each event check if we need to refresh */
 744                 bt_ctf_iter_add_callback(iter, 0, NULL, 0,
 745                                 check_timestamp,
 746                                 NULL, NULL, NULL);
 747                 /* to handle the scheduling events */
 748                 bt_ctf_iter_add_callback(iter,
 749                                 g_quark_from_static_string("sched_switch"),
 750                                 NULL, 0, handle_sched_switch, NULL, NULL, NULL);
 751                 /* to clean up the process table */
 752                 bt_ctf_iter_add_callback(iter,
 753                                 g_quark_from_static_string("sched_process_free"),
 754                                 NULL, 0, handle_sched_process_free, NULL, NULL, NULL);
 755                 /* to get all the process from the statedumps */
 756                 bt_ctf_iter_add_callback(iter,
 757                                 g_quark_from_static_string(
 758                                         "lttng_statedump_process_state"),
 759                                 NULL, 0, handle_statedump_process_state,
 760                                 NULL, NULL, NULL);
 761
 762                 /* for IO top */
 763                 bt_ctf_iter_add_callback(iter,
 764                                 g_quark_from_static_string("exit_syscall"),
 765                                 NULL, 0, handle_exit_syscall, NULL, NULL, NULL);
 766                 bt_ctf_iter_add_callback(iter,
 767                                 g_quark_from_static_string("sys_write"),
 768                                 NULL, 0, handle_sys_write, NULL, NULL, NULL);
 769                 bt_ctf_iter_add_callback(iter,
 770                                 g_quark_from_static_string("sys_read"),
 771                                 NULL, 0, handle_sys_read, NULL, NULL, NULL);
 772                 bt_ctf_iter_add_callback(iter,
 773                                 g_quark_from_static_string("sys_open"),
 774                                 NULL, 0, handle_sys_open, NULL, NULL, NULL);
 775                 bt_ctf_iter_add_callback(iter,
 776                                 g_quark_from_static_string("sys_close"),
 777                                 NULL, 0, handle_sys_close, NULL, NULL, NULL);
 778                 bt_ctf_iter_add_callback(iter,
 779                                 g_quark_from_static_string(
 780                                         "lttng_statedump_file_descriptor"),
 781                                 NULL, 0, handle_statedump_file_descriptor,
 782                                 NULL, NULL, NULL);
 783
 784                 /* for kprobes */
 785                 if (lttngtop.kprobes_table) {
 786                         for (i = 0; i < lttngtop.kprobes_table->len; i++) {
 787                                 kprobe = g_ptr_array_index(lttngtop.kprobes_table, i);
 788                                 bt_ctf_iter_add_callback(iter,
 789                                                 g_quark_from_static_string(
 790                                                         kprobe->probe_name),
 791                                                 NULL, 0, handle_kprobes,
 792                                                 NULL, NULL, NULL);
 793                         }
 794                 }
 795         }
 796
 797         while ((event = bt_ctf_iter_read_event(iter)) != NULL) {
 798                 if (quit || reload_trace)
 799                         goto end_iter;
 800                 ret = bt_iter_next(bt_ctf_get_iter(iter));
 801                 if (ret < 0)
 802                         goto end_iter;
 803         }
 804
 805         /* block until quit, we reached the end of the trace */
 806         sem_wait(&end_trace_sem);
 807
 808 end_iter:
 809         bt_ctf_iter_destroy(iter);
 810 }
 811
 812 /*
 813  * bt_context_add_traces_recursive: Open a trace recursively
 814  * (copied from BSD code in converter/babeltrace.c)
 815  *
 816  * Find each trace present in the subdirectory starting from the given
 817  * path, and add them to the context. The packet_seek parameter can be
 818  * NULL: this specify to use the default format packet_seek.
 819  *
 820  * Return: 0 on success, nonzero on failure.
 821  * Unable to open toplevel: failure.
 822  * Unable to open some subdirectory or file: warn and continue;
 823  */
 824 int bt_context_add_traces_recursive(struct bt_context *ctx, const char *path,
 825                 const char *format_str,
 826                 void (*packet_seek)(struct bt_stream_pos *pos,
 827                         size_t offset, int whence))
 828 {
 829         FTS *tree;
 830         FTSENT *node;
 831         GArray *trace_ids;
 832         char lpath[PATH_MAX];
 833         char * const paths[2] = { lpath, NULL };
 834         int ret = -1;
 835
 836         if ((strncmp(path, NET4_URL_PREFIX, sizeof(NET4_URL_PREFIX) - 1)) == 0 ||
 837                         (strncmp(path, NET6_URL_PREFIX, sizeof(NET6_URL_PREFIX) - 1)) == 0 ||
 838                         (strncmp(path, NET_URL_PREFIX, sizeof(NET_URL_PREFIX) - 1)) == 0) {
 839                 ret = bt_context_add_trace(ctx,
 840                                 path, format_str, packet_seek, NULL, NULL);
 841                 if (ret < 0) {
 842                         fprintf(stderr, "[warning] [Context] cannot open trace \"%s\" "
 843                                         "for reading.\n", path);
 844                         /* Allow to skip erroneous traces. */
 845                         ret = 1;        /* partial error */
 846                 }
 847                 return ret;
 848         }
 849         /*
 850          * Need to copy path, because fts_open can change it.
 851          * It is the pointer array, not the strings, that are constant.
 852          */
 853         strncpy(lpath, path, PATH_MAX);
 854         lpath[PATH_MAX - 1] = '\0';
 855
 856         tree = fts_open(paths, FTS_NOCHDIR | FTS_LOGICAL, 0);
 857         if (tree == NULL) {
 858                 fprintf(stderr, "[error] [Context] Cannot traverse \"%s\" for reading.\n",
 859                                 path);
 860                 return -EINVAL;
 861         }
 862
 863         trace_ids = g_array_new(FALSE, TRUE, sizeof(int));
 864
 865         while ((node = fts_read(tree))) {
 866                 int dirfd, metafd;
 867
 868                 if (!(node->fts_info & FTS_D))
 869                         continue;
 870
 871                 dirfd = open(node->fts_accpath, 0);
 872                 if (dirfd < 0) {
 873                         fprintf(stderr, "[error] [Context] Unable to open trace "
 874                                 "directory file descriptor.\n");
 875                         ret = dirfd;
 876                         goto error;
 877                 }
 878                 metafd = openat(dirfd, "metadata", O_RDONLY);
 879                 if (metafd < 0) {
 880                         close(dirfd);
 881                         continue;
 882                 } else {
 883                         int trace_id;
 884
 885                         ret = close(metafd);
 886                         if (ret < 0) {
 887                                 perror("close");
 888                                 goto error;
 889                         }
 890                         ret = close(dirfd);
 891                         if (ret < 0) {
 892                                 perror("close");
 893                                 goto error;
 894                         }
 895
 896                         trace_id = bt_context_add_trace(ctx,
 897                                 node->fts_accpath, format_str,
 898                                 packet_seek, NULL, NULL);
 899                         if (trace_id < 0) {
 900                                 fprintf(stderr, "[warning] [Context] opening trace \"%s\" from %s "
 901                                         "for reading.\n", node->fts_accpath, path);
 902                                 /* Allow to skip erroneous traces. */
 903                                 continue;
 904                         }
 905                         g_array_append_val(trace_ids, trace_id);
 906                 }
 907         }
 908
 909         g_array_free(trace_ids, TRUE);
 910         return ret;
 911
 912 error:
 913         return ret;
 914 }
 915
 916 static int check_field_requirements(const struct bt_ctf_field_decl *const * field_list,
 917                 int field_cnt, int *tid_check, int *pid_check,
 918                 int *procname_check, int *ppid_check)
 919 {
 920         int j;
 921         struct perfcounter *global;
 922         const char *name;
 923
 924         for (j = 0; j < field_cnt; j++) {
 925                 name = bt_ctf_get_decl_field_name(field_list[j]);
 926                 if (*tid_check == 0) {
 927                         if (strncmp(name, "tid", 3) == 0)
 928                                 (*tid_check)++;
 929                 }
 930                 if (*pid_check == 0) {
 931                         if (strncmp(name, "pid", 3) == 0)
 932                                 (*pid_check)++;
 933                 }
 934                 if (*ppid_check == 0) {
 935                         if (strncmp(name, "ppid", 4) == 0)
 936                                 (*ppid_check)++;
 937                 }
 938                 if (*procname_check == 0) {
 939                         if (strncmp(name, "procname", 8) == 0)
 940                                 (*procname_check)++;
 941                 }
 942                 if (strncmp(name, "perf_", 5) == 0) {
 943                         global = g_hash_table_lookup(global_perf_liszt, (gpointer) name);
 944                         if (!global) {
 945                                 global = g_new0(struct perfcounter, 1);
 946                                 /* by default, sort on the first perf context */
 947                                 if (g_hash_table_size(global_perf_liszt) == 0)
 948                                         global->sort = 1;
 949                                 global->visible = 1;
 950                                 g_hash_table_insert(global_perf_liszt, (gpointer) strdup(name), global);
 951                         }
 952                 }
 953         }
 954
 955         if (*tid_check == 1 && *pid_check == 1 && *ppid_check == 1 &&
 956                         *procname_check == 1)
 957                 return 0;
 958
 959         return -1;
 960 }
 961
 962 /*
 963  * check_requirements: check if the required context informations are available
 964  *
 965  * If each mandatory context information is available for at least in one
 966  * event, return 0 otherwise return -1.
 967  */
 968 int check_requirements(struct bt_context *ctx)
 969 {
 970         unsigned int i, evt_cnt, field_cnt;
 971         struct bt_ctf_event_decl *const * evt_list;
 972         const struct bt_ctf_field_decl *const * field_list;
 973         int tid_check = 0;
 974         int pid_check = 0;
 975         int procname_check = 0;
 976         int ppid_check = 0;
 977         int ret = 0;
 978
 979         ret = bt_ctf_get_event_decl_list(0, ctx, &evt_list, &evt_cnt);
 980         if (ret < 0) {
 981                 goto end;
 982         }
 983
 984         for (i = 0; i < evt_cnt; i++) {
 985                 bt_ctf_get_decl_fields(evt_list[i], BT_STREAM_EVENT_CONTEXT,
 986                                 &field_list, &field_cnt);
 987                 ret = check_field_requirements(field_list, field_cnt,
 988                                 &tid_check, &pid_check, &procname_check,
 989                                 &ppid_check);
 990
 991                 bt_ctf_get_decl_fields(evt_list[i], BT_EVENT_CONTEXT,
 992                                 &field_list, &field_cnt);
 993                 ret = check_field_requirements(field_list, field_cnt,
 994                                 &tid_check, &pid_check, &procname_check,
 995                                 &ppid_check);
 996
 997                 bt_ctf_get_decl_fields(evt_list[i], BT_STREAM_PACKET_CONTEXT,
 998                                 &field_list, &field_cnt);
 999                 ret = check_field_requirements(field_list, field_cnt,
1000                                 &tid_check, &pid_check, &procname_check,
1001                                 &ppid_check);
1002         }
1003
1004         if (tid_check == 0) {
1005                 ret = -1;
1006                 fprintf(stderr, "[error] missing tid context information\n");
1007         }
1008         if (pid_check == 0) {
1009                 ret = -1;
1010                 fprintf(stderr, "[error] missing pid context information\n");
1011         }
1012         if (ppid_check == 0) {
1013                 ret = -1;
1014                 fprintf(stderr, "[error] missing ppid context information\n");
1015         }
1016         if (procname_check == 0) {
1017                 ret = -1;
1018                 fprintf(stderr, "[error] missing procname context information\n");
1019         }
1020
1021 end:
1022         return ret;
1023 }
1024
1025 int main(int argc, char **argv)
1026 {
1027         int ret;
1028         struct bt_context *bt_ctx = NULL;
1029
1030         init_lttngtop();
1031         ret = parse_options(argc, argv);
1032         if (ret < 0) {
1033                 fprintf(stdout, "Error parsing options.\n\n");
1034                 usage(stdout);
1035                 exit(EXIT_FAILURE);
1036         } else if (ret > 0) {
1037                 exit(EXIT_SUCCESS);
1038         }
1039
1040         if (!opt_input_path && !remote_live) {
1041                 /* mmap live */
1042 #ifdef LTTNGTOP_MMAP_LIVE
1043                 if (opt_textdump) {
1044                         signal(SIGTERM, handle_textdump_sigterm);
1045                         signal(SIGINT, handle_textdump_sigterm);
1046                 }
1047                 mmap_live_loop(bt_ctx);
1048                 pthread_join(timer_thread, NULL);
1049                 quit = 1;
1050                 pthread_join(display_thread, NULL);
1051
1052                 lttng_stop_tracing("test");
1053                 lttng_destroy_session("test");
1054
1055                 goto end;
1056 #else
1057                 fprintf(stderr, "[ERROR] Mmap live support not compiled, specify a "
1058                                 "trace directory or -r <relayd hostname/IP>\n");
1059                 usage(stdout);
1060                 ret = -1;
1061                 goto end;
1062 #endif /* LTTNGTOP_MMAP_LIVE */
1063         } else if (!opt_input_path && remote_live) {
1064                 /* network live */
1065 #if 0
1066                 ret = setup_network_live(opt_relay_hostname, opt_begin);
1067                 if (ret < 0) {
1068                         goto end;
1069                 }
1070
1071                 ret = open_trace(&bt_ctx);
1072                 if (ret < 0) {
1073                         goto end;
1074                 }
1075 #endif
1076
1077                 bt_ctx = bt_context_create();
1078                 ret = bt_context_add_traces_recursive(bt_ctx, opt_relay_hostname,
1079                                 "lttng-live", NULL);
1080                 if (ret < 0) {
1081                         fprintf(stderr, "[error] Opening the trace\n");
1082                         goto end;
1083                 }
1084         } else {
1085                 //init_lttngtop();
1086
1087                 bt_ctx = bt_context_create();
1088                 ret = bt_context_add_traces_recursive(bt_ctx, opt_input_path, "ctf", NULL);
1089                 if (ret < 0) {
1090                         fprintf(stderr, "[error] Opening the trace\n");
1091                         goto end;
1092                 }
1093
1094                 ret = check_requirements(bt_ctx);
1095                 if (ret < 0) {
1096                         fprintf(stderr, "[error] some mandatory contexts "
1097                                         "were missing, exiting.\n");
1098                         goto end;
1099                 }
1100
1101                 if (!opt_textdump) {
1102                         pthread_create(&display_thread, NULL, ncurses_display,
1103                                         (void *) NULL);
1104                         pthread_create(&timer_thread, NULL, refresh_thread,
1105                                         (void *) NULL);
1106                 }
1107
1108                 iter_trace(bt_ctx);
1109         }
1110
1111
1112         pthread_join(display_thread, NULL);
1113         quit = 1;
1114         pthread_join(timer_thread, NULL);
1115
1116         ret = 0;
1117
1118 end:
1119         if (bt_ctx)
1120                 bt_context_put(bt_ctx);
1121
1122         return ret;
1123 }