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 #include "lttng-index.h"
  56
  57 #define DEFAULT_FILE_ARRAY_SIZE 1
  58
  59 const char *opt_input_path;
  60 static int opt_textdump;
  61 static int opt_child;
  62
  63 int quit = 0;
  64
  65 struct lttngtop *copy;
  66 pthread_t display_thread;
  67 pthread_t timer_thread;
  68
  69 unsigned long refresh_display = 1 * NSEC_PER_SEC;
  70 unsigned long last_display_update = 0;
  71 unsigned long last_event_ts = 0;
  72
  73 /* list of FDs available for being read with snapshots */
  74 struct bt_mmap_stream_list mmap_list;
  75 GPtrArray *lttng_consumer_stream_array;
  76 int sessiond_metadata, consumerd_metadata;
  77 struct lttng_consumer_local_data *ctx = NULL;
  78 /* list of snapshots currently not consumed */
  79 GPtrArray *available_snapshots;
  80 sem_t metadata_available;
  81 int reload_trace = 0;
  82
  83 int last_textdump_print_newline = 1;
  84
  85 enum {
  86         OPT_NONE = 0,
  87         OPT_HELP,
  88         OPT_TEXTDUMP,
  89         OPT_PID,
  90         OPT_CHILD,
  91         OPT_HOSTNAME,
  92         OPT_RELAY_HOSTNAME,
  93         OPT_KPROBES,
  94 };
  95
  96 static struct poptOption long_options[] = {
  97         /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
  98         { "help", 'h', POPT_ARG_NONE, NULL, OPT_HELP, NULL, NULL },
  99         { "textdump", 't', POPT_ARG_NONE, NULL, OPT_TEXTDUMP, NULL, NULL },
 100         { "child", 'f', POPT_ARG_NONE, NULL, OPT_CHILD, NULL, NULL },
 101         { "pid", 'p', POPT_ARG_STRING, &opt_tid, OPT_PID, NULL, NULL },
 102         { "hostname", 'n', POPT_ARG_STRING, &opt_hostname, OPT_HOSTNAME, NULL, NULL },
 103         { "relay-hostname", 'r', POPT_ARG_STRING, &opt_relay_hostname,
 104                 OPT_RELAY_HOSTNAME, NULL, NULL },
 105         { "kprobes", 'k', POPT_ARG_STRING, &opt_kprobes, OPT_KPROBES, NULL, NULL },
 106         { NULL, 0, 0, NULL, 0, NULL, NULL },
 107 };
 108
 109 #ifdef LTTNGTOP_MMAP_LIVE
 110 static void handle_textdump_sigterm(int signal)
 111 {
 112         quit = 1;
 113         lttng_destroy_session("test");
 114 }
 115 #endif
 116
 117 void *refresh_thread(void *p)
 118 {
 119         while (1) {
 120                 if (quit) {
 121                         sem_post(&pause_sem);
 122                         sem_post(&timer);
 123                         sem_post(&end_trace_sem);
 124                         sem_post(&goodtodisplay);
 125                         sem_post(&goodtoupdate);
 126                         pthread_exit(0);
 127                 }
 128                 if (!opt_input_path) {
 129 #ifdef LTTNGTOP_MMAP_LIVE
 130                         mmap_live_flush(mmap_list);
 131 #endif
 132                 }
 133                 sem_wait(&pause_sem);
 134                 sem_post(&pause_sem);
 135                 sem_post(&timer);
 136                 sleep(refresh_display/NSEC_PER_SEC);
 137         }
 138 }
 139
 140 void *ncurses_display(void *p)
 141 {
 142         unsigned int current_display_index = 0;
 143
 144         sem_wait(&bootstrap);
 145         /*
 146          * Prevent the 1 second delay when we hit ESC
 147          */
 148         ESCDELAY = 0;
 149         init_ncurses();
 150
 151         while (1) {
 152                 sem_wait(&timer);
 153                 sem_wait(&goodtodisplay);
 154                 sem_wait(&pause_sem);
 155
 156                 if (quit) {
 157                         sem_post(&pause_sem);
 158                         sem_post(&timer);
 159                         reset_ncurses();
 160                         pthread_exit(0);
 161                 }
 162
 163                 copy = g_ptr_array_index(copies, current_display_index);
 164                 assert(copy);
 165                 display(current_display_index++);
 166
 167                 sem_post(&goodtoupdate);
 168                 sem_post(&pause_sem);
 169         }
 170 }
 171
 172 void print_fields(struct bt_ctf_event *event)
 173 {
 174         unsigned int cnt, i;
 175         const struct bt_definition *const * list;
 176         const struct bt_declaration *l;
 177         const struct bt_definition *scope;
 178         enum ctf_type_id type;
 179         const char *str;
 180
 181         scope = bt_ctf_get_top_level_scope(event, BT_EVENT_FIELDS);
 182
 183         bt_ctf_get_field_list(event, scope, &list, &cnt);
 184         for (i = 0; i < cnt; i++) {
 185                 if (i != 0)
 186                         printf(", ");
 187                 printf("%s = ", bt_ctf_field_name(list[i]));
 188                 l = bt_ctf_get_decl_from_def(list[i]);
 189                 type = bt_ctf_field_type(l);
 190                 if (type == CTF_TYPE_INTEGER) {
 191                         if (bt_ctf_get_int_signedness(l) == 0)
 192                                 printf("%" PRIu64 "", bt_ctf_get_uint64(list[i]));
 193                         else
 194                                 printf("%" PRId64 "", bt_ctf_get_int64(list[i]));
 195                 } else if (type == CTF_TYPE_STRING) {
 196                         printf("%s", bt_ctf_get_string(list[i]));
 197                 } else if (type == CTF_TYPE_ARRAY) {
 198                         str = bt_ctf_get_char_array(list[i]);
 199                         if (!bt_ctf_field_get_error() && str)
 200                                 printf("%s", str);
 201                 }
 202         }
 203 }
 204
 205 /*
 206  * hook on each event to check the timestamp and refresh the display if
 207  * necessary
 208  */
 209 enum bt_cb_ret print_timestamp(struct bt_ctf_event *call_data, void *private_data)
 210 {
 211         unsigned long timestamp;
 212         struct tm start;
 213         uint64_t ts_nsec_start;
 214         int pid, cpu_id;
 215         int64_t syscall_ret;
 216         const struct bt_definition *scope;
 217         const char *hostname, *procname;
 218
 219         timestamp = bt_ctf_get_timestamp(call_data);
 220
 221         /* can happen in network live when tracing is idle */
 222         if (timestamp < last_event_ts)
 223                 goto end_stop;
 224
 225         last_event_ts = timestamp;
 226
 227         start = format_timestamp(timestamp);
 228         ts_nsec_start = timestamp % NSEC_PER_SEC;
 229
 230         pid = get_context_pid(call_data);
 231         if (pid == -1ULL && opt_tid) {
 232                 goto error;
 233         }
 234
 235         hostname = get_context_hostname(call_data);
 236         if (opt_tid || opt_hostname)
 237                 if (!lookup_filter_tid_list(pid))
 238                         goto end;
 239
 240         cpu_id = get_cpu_id(call_data);
 241         procname = get_context_comm(call_data);
 242
 243         if ((strcmp(bt_ctf_event_name(call_data), "exit_syscall") == 0) &&
 244                         !last_textdump_print_newline) {
 245                 scope = bt_ctf_get_top_level_scope(call_data,
 246                                 BT_EVENT_FIELDS);
 247                 syscall_ret = bt_ctf_get_int64(bt_ctf_get_field(call_data,
 248                                         scope, "_ret"));
 249                 printf("= %ld\n", syscall_ret);
 250                 last_textdump_print_newline = 1;
 251         } else {
 252                 /* we might have lost the exit_syscall event, so need to
 253                  * print the newline in this case */
 254                 if (last_textdump_print_newline == 0)
 255                         printf("\n");
 256                 printf("%02d:%02d:%02d.%09" PRIu64 " (%s) (cpu %d) [%s (%d)] %s (",
 257                                 start.tm_hour, start.tm_min, start.tm_sec,
 258                                 ts_nsec_start, hostname, cpu_id, procname, pid,
 259                                 bt_ctf_event_name(call_data));
 260                 print_fields(call_data);
 261                 printf(") ");
 262                 if (strncmp(bt_ctf_event_name(call_data), "sys_", 4) != 0) {
 263                         printf("\n");
 264                         last_textdump_print_newline = 1;
 265                 } else {
 266                         last_textdump_print_newline = 0;
 267                 }
 268         }
 269
 270 end:
 271         return BT_CB_OK;
 272 error:
 273         return BT_CB_ERROR_STOP;
 274 end_stop:
 275         return BT_CB_OK_STOP;
 276 }
 277
 278 enum bt_cb_ret handle_kprobes(struct bt_ctf_event *call_data, void *private_data)
 279 {
 280         int i;
 281         struct kprobes *kprobe;
 282
 283         /* for kprobes */
 284         for (i = 0; i < lttngtop.kprobes_table->len; i++) {
 285                 kprobe = g_ptr_array_index(lttngtop.kprobes_table, i);
 286                 if (strcmp(bt_ctf_event_name(call_data), kprobe->probe_name) == 0) {
 287                         kprobe->count++;
 288                 }
 289         }
 290
 291         return BT_CB_OK;
 292 }
 293
 294 /*
 295  * hook on each event to check the timestamp and refresh the display if
 296  * necessary
 297  */
 298 enum bt_cb_ret check_timestamp(struct bt_ctf_event *call_data, void *private_data)
 299 {
 300         unsigned long timestamp;
 301
 302         timestamp = bt_ctf_get_timestamp(call_data);
 303         if (timestamp == -1ULL)
 304                 goto error;
 305
 306         /* can happen in network live when tracing is idle */
 307         if (timestamp < last_event_ts)
 308                 goto end_stop;
 309
 310         last_event_ts = timestamp;
 311
 312         if (last_display_update == 0)
 313                 last_display_update = timestamp;
 314
 315         if (timestamp - last_display_update >= refresh_display) {
 316                 sem_wait(&goodtoupdate);
 317                 g_ptr_array_add(copies, get_copy_lttngtop(last_display_update,
 318                                         timestamp));
 319                 sem_post(&goodtodisplay);
 320                 sem_post(&bootstrap);
 321                 last_display_update = timestamp;
 322         }
 323         return BT_CB_OK;
 324
 325 error:
 326         fprintf(stderr, "check_timestamp callback error\n");
 327         return BT_CB_ERROR_STOP;
 328
 329 end_stop:
 330         return BT_CB_OK_STOP;
 331 }
 332
 333 /*
 334  * get_perf_counter : get or create and return a perf_counter struct for
 335  * either a process or a cpu (only one of the 2 parameters mandatory)
 336  */
 337 struct perfcounter *get_perf_counter(const char *name, struct processtop *proc,
 338                 struct cputime *cpu)
 339 {
 340         struct perfcounter *ret;
 341         GHashTable *table;
 342
 343         if (proc)
 344                 table = proc->perf;
 345         else if (cpu)
 346                 table = cpu->perf;
 347         else
 348                 goto error;
 349
 350         ret = g_hash_table_lookup(table, (gpointer) name);
 351         if (ret)
 352                 goto end;
 353
 354         ret = g_new0(struct perfcounter, 1);
 355         /* by default, make it visible in the UI */
 356         ret->visible = 1;
 357         g_hash_table_insert(table, (gpointer) strdup(name), ret);
 358
 359 end:
 360         return ret;
 361
 362 error:
 363         return NULL;
 364 }
 365
 366 void update_perf_value(struct processtop *proc, struct cputime *cpu,
 367                 const char *name, int value)
 368 {
 369         struct perfcounter *cpu_perf, *process_perf;
 370
 371         cpu_perf = get_perf_counter(name, NULL, cpu);
 372         if (cpu_perf->count < value) {
 373                 process_perf = get_perf_counter(name, proc, NULL);
 374                 process_perf->count += value - cpu_perf->count;
 375                 cpu_perf->count = value;
 376         }
 377 }
 378
 379 void extract_perf_counter_scope(const struct bt_ctf_event *event,
 380                 const struct bt_definition *scope,
 381                 struct processtop *proc,
 382                 struct cputime *cpu)
 383 {
 384         struct bt_definition const * const *list = NULL;
 385         const struct bt_definition *field;
 386         unsigned int count;
 387         struct perfcounter *perfcounter;
 388         GHashTableIter iter;
 389         gpointer key;
 390         int ret;
 391
 392         if (!scope)
 393                 goto end;
 394
 395         ret = bt_ctf_get_field_list(event, scope, &list, &count);
 396         if (ret < 0)
 397                 goto end;
 398
 399         if (count == 0)
 400                 goto end;
 401
 402         g_hash_table_iter_init(&iter, global_perf_liszt);
 403         while (g_hash_table_iter_next (&iter, &key, (gpointer) &perfcounter)) {
 404                 field = bt_ctf_get_field(event, scope, (char *) key);
 405                 if (field) {
 406                         int value = bt_ctf_get_uint64(field);
 407                         if (bt_ctf_field_get_error())
 408                                 continue;
 409                         update_perf_value(proc, cpu, (char *) key, value);
 410                 }
 411         }
 412
 413 end:
 414         return;
 415 }
 416
 417 void update_perf_counter(struct processtop *proc, const struct bt_ctf_event *event)
 418 {
 419         struct cputime *cpu;
 420         const struct bt_definition *scope;
 421
 422         cpu = get_cpu(get_cpu_id(event));
 423
 424         scope = bt_ctf_get_top_level_scope(event, BT_STREAM_EVENT_CONTEXT);
 425         extract_perf_counter_scope(event, scope, proc, cpu);
 426
 427         scope = bt_ctf_get_top_level_scope(event, BT_STREAM_PACKET_CONTEXT);
 428         extract_perf_counter_scope(event, scope, proc, cpu);
 429
 430         scope = bt_ctf_get_top_level_scope(event, BT_EVENT_CONTEXT);
 431         extract_perf_counter_scope(event, scope, proc, cpu);
 432 }
 433
 434 enum bt_cb_ret fix_process_table(struct bt_ctf_event *call_data,
 435                 void *private_data)
 436 {
 437         int pid, tid, ppid, vpid, vtid, vppid;
 438         char *comm, *hostname;
 439         struct processtop *parent, *child;
 440         unsigned long timestamp;
 441
 442         timestamp = bt_ctf_get_timestamp(call_data);
 443         if (timestamp == -1ULL)
 444                 goto error;
 445
 446         pid = get_context_pid(call_data);
 447         if (pid == -1ULL) {
 448                 goto error;
 449         }
 450
 451         tid = get_context_tid(call_data);
 452         if (tid == -1ULL) {
 453                 goto error;
 454         }
 455         ppid = get_context_ppid(call_data);
 456         if (ppid == -1ULL) {
 457                 goto error;
 458         }
 459         vpid = get_context_vpid(call_data);
 460         if (pid == -1ULL) {
 461                 vpid = -1;
 462         }
 463         vtid = get_context_vtid(call_data);
 464         if (tid == -1ULL) {
 465                 vtid = -1;
 466         }
 467         vppid = get_context_vppid(call_data);
 468         if (ppid == -1ULL) {
 469                 vppid = -1;
 470         }
 471         comm = get_context_comm(call_data);
 472         if (!comm) {
 473                 goto error;
 474         }
 475         /* optional */
 476         hostname = get_context_hostname(call_data);
 477
 478         /* find or create the current process */
 479         child = find_process_tid(&lttngtop, tid, comm);
 480         if (!child)
 481                 child = add_proc(&lttngtop, tid, comm, timestamp, hostname);
 482         if (!child)
 483                 goto end;
 484         update_proc(child, pid, tid, ppid, vpid, vtid, vppid, comm, hostname);
 485
 486         if (pid != tid) {
 487                 /* find or create the parent */
 488                 parent = find_process_tid(&lttngtop, pid, comm);
 489                 if (!parent) {
 490                         parent = add_proc(&lttngtop, pid, comm, timestamp, hostname);
 491                         if (parent)
 492                                 parent->pid = pid;
 493                 }
 494
 495                 /* attach the parent to the current process */
 496                 child->threadparent = parent;
 497                 add_thread(parent, child);
 498         }
 499
 500         update_perf_counter(child, call_data);
 501
 502 end:
 503         return BT_CB_OK;
 504
 505 error:
 506         return BT_CB_ERROR_STOP;
 507 }
 508
 509 void init_lttngtop()
 510 {
 511         copies = g_ptr_array_new();
 512         global_perf_liszt = g_hash_table_new(g_str_hash, g_str_equal);
 513         global_filter_list = g_hash_table_new(g_str_hash, g_str_equal);
 514         global_host_list = g_hash_table_new(g_str_hash, g_str_equal);
 515
 516         sem_init(&goodtodisplay, 0, 0);
 517         sem_init(&goodtoupdate, 0, 1);
 518         sem_init(&timer, 0, 1);
 519         sem_init(&bootstrap, 0, 0);
 520         sem_init(&pause_sem, 0, 1);
 521         sem_init(&end_trace_sem, 0, 0);
 522
 523         reset_global_counters();
 524         lttngtop.nbproc = 0;
 525         lttngtop.nbthreads = 0;
 526         lttngtop.nbfiles = 0;
 527
 528         lttngtop.process_hash_table = g_hash_table_new(g_direct_hash,
 529                         g_direct_equal);
 530         lttngtop.process_table = g_ptr_array_new();
 531         lttngtop.files_table = g_ptr_array_new();
 532         lttngtop.cpu_table = g_ptr_array_new();
 533
 534         toggle_filter = -1;
 535 }
 536
 537 void usage(FILE *fp)
 538 {
 539         fprintf(fp, "LTTngTop %s\n\n", VERSION);
 540         fprintf(fp, "Usage : lttngtop [OPTIONS] [TRACE]\n");
 541         fprintf(fp, "  TRACE                    Path to the trace to analyse (no trace path for live tracing)\n");
 542         fprintf(fp, "  -h, --help               This help message\n");
 543         fprintf(fp, "  -t, --textdump           Display live events in text-only\n");
 544         fprintf(fp, "  -p, --pid                Comma-separated list of PIDs to display\n");
 545         fprintf(fp, "  -f, --child              Follow threads associated with selected PIDs\n");
 546         fprintf(fp, "  -n, --hostname           Comma-separated list of hostnames to display (require hostname context in trace)\n");
 547         fprintf(fp, "  -k, --kprobes            Comma-separated list of kprobes to insert (same format as lttng enable-event)\n");
 548 }
 549
 550 /*
 551  * Parse probe options.
 552  * Shamelessly stolen from lttng-tools :
 553  * src/bin/lttng/commands/enable_events.c
 554  */
 555 static struct kprobes *parse_probe_opts(char *opt)
 556 {
 557         char s_hex[19];
 558         char name[LTTNG_SYMBOL_NAME_LEN];
 559         struct kprobes *kprobe;
 560         int ret;
 561
 562         /*
 563         kprobe->probe_addr = 0;
 564         kprobe->probe_offset = 0;
 565         asprintf(&kprobe->probe_name, "probe_sys_open");
 566         asprintf(&kprobe->symbol_name, "sys_open");
 567         */
 568
 569         if (opt == NULL) {
 570                 kprobe = NULL;
 571                 goto end;
 572         }
 573
 574         kprobe = g_new0(struct kprobes, 1);
 575
 576         /* Check for symbol+offset */
 577         ret = sscanf(opt, "%[^'+']+%s", name, s_hex);
 578         if (ret == 2) {
 579                 ret = asprintf(&kprobe->probe_name, "probe_%s", name);
 580                 ret = asprintf(&kprobe->symbol_name, "%s", name);
 581
 582                 if (strlen(s_hex) == 0) {
 583                         fprintf(stderr, "Invalid probe offset %s", s_hex);
 584                         ret = -1;
 585                         goto end;
 586                 }
 587                 kprobe->probe_offset = strtoul(s_hex, NULL, 0);
 588                 kprobe->probe_addr = 0;
 589                 goto end;
 590         }
 591
 592         /* Check for symbol */
 593         if (isalpha(name[0])) {
 594                 ret = sscanf(opt, "%s", name);
 595                 if (ret == 1) {
 596                         ret = asprintf(&kprobe->probe_name, "probe_%s", name);
 597                         ret = asprintf(&kprobe->symbol_name, "%s", name);
 598                         kprobe->probe_offset = 0;
 599                         kprobe->probe_addr = 0;
 600                         goto end;
 601                 }
 602         }
 603
 604         /* Check for address */
 605         ret = sscanf(opt, "%s", s_hex);
 606         if (ret > 0) {
 607                 if (strlen(s_hex) == 0) {
 608                         fprintf(stderr, "Invalid probe address %s", s_hex);
 609                         ret = -1;
 610                         goto end;
 611                 }
 612                 ret = asprintf(&kprobe->probe_name, "probe_%s", s_hex);
 613                 kprobe->probe_offset = 0;
 614                 kprobe->probe_addr = strtoul(s_hex, NULL, 0);
 615                 goto end;
 616         }
 617
 618         /* No match */
 619         kprobe = NULL;
 620
 621 end:
 622         return kprobe;
 623 }
 624
 625 /*
 626  * Return 0 if caller should continue, < 0 if caller should return
 627  * error, > 0 if caller should exit without reporting error.
 628  */
 629 static int parse_options(int argc, char **argv)
 630 {
 631         poptContext pc;
 632         int opt, ret = 0;
 633         char *tmp_str;
 634         int *tid;
 635
 636         remote_live = 0;
 637
 638         pc = poptGetContext(NULL, argc, (const char **) argv, long_options, 0);
 639         poptReadDefaultConfig(pc, 0);
 640
 641         while ((opt = poptGetNextOpt(pc)) != -1) {
 642                 switch (opt) {
 643                         case OPT_HELP:
 644                                 usage(stdout);
 645                                 ret = 1;    /* exit cleanly */
 646                                 goto end;
 647                         case OPT_TEXTDUMP:
 648                                 opt_textdump = 1;
 649                                 break;
 650                         case OPT_CHILD:
 651                                 opt_textdump = 1;
 652                                 opt_child = 1;
 653                                 break;
 654                         case OPT_PID:
 655                                 toggle_filter = 1;
 656                                 tid_filter_list = g_hash_table_new(g_str_hash,
 657                                                 g_str_equal);
 658                                 tmp_str = strtok(opt_tid, ",");
 659                                 while (tmp_str) {
 660                                         tid = malloc(sizeof(int));
 661                                         *tid = atoi(tmp_str);
 662                                         g_hash_table_insert(tid_filter_list,
 663                                                         (gpointer) tid, tid);
 664                                         tmp_str = strtok(NULL, ",");
 665                                 }
 666                                 break;
 667                         case OPT_HOSTNAME:
 668                                 toggle_filter = 1;
 669                                 tmp_str = strtok(opt_hostname, ",");
 670                                 while (tmp_str) {
 671                                         add_hostname_list(tmp_str, 1);
 672                                         tmp_str = strtok(NULL, ",");
 673                                 }
 674                                 break;
 675                         case OPT_RELAY_HOSTNAME:
 676                                 remote_live = 1;
 677                                 break;
 678                         case OPT_KPROBES:
 679                                 lttngtop.kprobes_table = g_ptr_array_new();
 680                                 tmp_str = strtok(opt_kprobes, ",");
 681                                 while (tmp_str) {
 682                                         struct kprobes *kprobe;
 683
 684                                         kprobe = parse_probe_opts(tmp_str);
 685                                         if (kprobe) {
 686                                                 g_ptr_array_add(
 687                                                         lttngtop.kprobes_table,
 688                                                         kprobe);
 689                                         } else {
 690                                                 ret = -EINVAL;
 691                                                 goto end;
 692                                         }
 693                                         tmp_str = strtok(NULL, ",");
 694                                 }
 695                                 break;
 696                         default:
 697                                 ret = -EINVAL;
 698                                 goto end;
 699                 }
 700         }
 701
 702         opt_input_path = poptGetArg(pc);
 703
 704 end:
 705         if (pc) {
 706                 poptFreeContext(pc);
 707         }
 708         return ret;
 709 }
 710
 711 void iter_trace(struct bt_context *bt_ctx)
 712 {
 713         struct bt_ctf_iter *iter;
 714         struct bt_iter_pos begin_pos;
 715         struct kprobes *kprobe;
 716         const struct bt_ctf_event *event;
 717         int i;
 718         int ret = 0;
 719
 720         begin_pos.type = BT_SEEK_BEGIN;
 721         iter = bt_ctf_iter_create(bt_ctx, &begin_pos, NULL);
 722
 723         /* at each event, verify the status of the process table */
 724         bt_ctf_iter_add_callback(iter, 0, NULL, 0,
 725                         fix_process_table,
 726                         NULL, NULL, NULL);
 727         if (opt_textdump) {
 728                 bt_ctf_iter_add_callback(iter, 0, NULL, 0,
 729                                 print_timestamp,
 730                                 NULL, NULL, NULL);
 731         } else {
 732                 /* at each event check if we need to refresh */
 733                 bt_ctf_iter_add_callback(iter, 0, NULL, 0,
 734                                 check_timestamp,
 735                                 NULL, NULL, NULL);
 736                 /* to handle the scheduling events */
 737                 bt_ctf_iter_add_callback(iter,
 738                                 g_quark_from_static_string("sched_switch"),
 739                                 NULL, 0, handle_sched_switch, NULL, NULL, NULL);
 740                 /* to clean up the process table */
 741                 bt_ctf_iter_add_callback(iter,
 742                                 g_quark_from_static_string("sched_process_free"),
 743                                 NULL, 0, handle_sched_process_free, NULL, NULL, NULL);
 744                 /* to get all the process from the statedumps */
 745                 bt_ctf_iter_add_callback(iter,
 746                                 g_quark_from_static_string(
 747                                         "lttng_statedump_process_state"),
 748                                 NULL, 0, handle_statedump_process_state,
 749                                 NULL, NULL, NULL);
 750
 751                 /* for IO top */
 752                 bt_ctf_iter_add_callback(iter,
 753                                 g_quark_from_static_string("exit_syscall"),
 754                                 NULL, 0, handle_exit_syscall, NULL, NULL, NULL);
 755                 bt_ctf_iter_add_callback(iter,
 756                                 g_quark_from_static_string("sys_write"),
 757                                 NULL, 0, handle_sys_write, NULL, NULL, NULL);
 758                 bt_ctf_iter_add_callback(iter,
 759                                 g_quark_from_static_string("sys_read"),
 760                                 NULL, 0, handle_sys_read, NULL, NULL, NULL);
 761                 bt_ctf_iter_add_callback(iter,
 762                                 g_quark_from_static_string("sys_open"),
 763                                 NULL, 0, handle_sys_open, NULL, NULL, NULL);
 764                 bt_ctf_iter_add_callback(iter,
 765                                 g_quark_from_static_string("sys_close"),
 766                                 NULL, 0, handle_sys_close, NULL, NULL, NULL);
 767                 bt_ctf_iter_add_callback(iter,
 768                                 g_quark_from_static_string(
 769                                         "lttng_statedump_file_descriptor"),
 770                                 NULL, 0, handle_statedump_file_descriptor,
 771                                 NULL, NULL, NULL);
 772
 773                 /* for kprobes */
 774                 if (lttngtop.kprobes_table) {
 775                         for (i = 0; i < lttngtop.kprobes_table->len; i++) {
 776                                 kprobe = g_ptr_array_index(lttngtop.kprobes_table, i);
 777                                 bt_ctf_iter_add_callback(iter,
 778                                                 g_quark_from_static_string(
 779                                                         kprobe->probe_name),
 780                                                 NULL, 0, handle_kprobes,
 781                                                 NULL, NULL, NULL);
 782                         }
 783                 }
 784         }
 785
 786         while ((event = bt_ctf_iter_read_event(iter)) != NULL) {
 787                 if (quit || reload_trace)
 788                         goto end_iter;
 789                 ret = bt_iter_next(bt_ctf_get_iter(iter));
 790                 if (ret < 0)
 791                         goto end_iter;
 792         }
 793
 794         /* block until quit, we reached the end of the trace */
 795         sem_wait(&end_trace_sem);
 796
 797 end_iter:
 798         bt_ctf_iter_destroy(iter);
 799 }
 800
 801 /*
 802  * bt_context_add_traces_recursive: Open a trace recursively
 803  * (copied from BSD code in converter/babeltrace.c)
 804  *
 805  * Find each trace present in the subdirectory starting from the given
 806  * path, and add them to the context. The packet_seek parameter can be
 807  * NULL: this specify to use the default format packet_seek.
 808  *
 809  * Return: 0 on success, nonzero on failure.
 810  * Unable to open toplevel: failure.
 811  * Unable to open some subdirectory or file: warn and continue;
 812  */
 813 int bt_context_add_traces_recursive(struct bt_context *ctx, const char *path,
 814                 const char *format_str,
 815                 void (*packet_seek)(struct bt_stream_pos *pos,
 816                         size_t offset, int whence))
 817 {
 818         FTS *tree;
 819         FTSENT *node;
 820         GArray *trace_ids;
 821         char lpath[PATH_MAX];
 822         char * const paths[2] = { lpath, NULL };
 823         int ret = -1;
 824
 825         /*
 826          * Need to copy path, because fts_open can change it.
 827          * It is the pointer array, not the strings, that are constant.
 828          */
 829         strncpy(lpath, path, PATH_MAX);
 830         lpath[PATH_MAX - 1] = '\0';
 831
 832         tree = fts_open(paths, FTS_NOCHDIR | FTS_LOGICAL, 0);
 833         if (tree == NULL) {
 834                 fprintf(stderr, "[error] [Context] Cannot traverse \"%s\" for reading.\n",
 835                                 path);
 836                 return -EINVAL;
 837         }
 838
 839         trace_ids = g_array_new(FALSE, TRUE, sizeof(int));
 840
 841         while ((node = fts_read(tree))) {
 842                 int dirfd, metafd;
 843
 844                 if (!(node->fts_info & FTS_D))
 845                         continue;
 846
 847                 dirfd = open(node->fts_accpath, 0);
 848                 if (dirfd < 0) {
 849                         fprintf(stderr, "[error] [Context] Unable to open trace "
 850                                 "directory file descriptor.\n");
 851                         ret = dirfd;
 852                         goto error;
 853                 }
 854                 metafd = openat(dirfd, "metadata", O_RDONLY);
 855                 if (metafd < 0) {
 856                         close(dirfd);
 857                         ret = -1;
 858                         continue;
 859                 } else {
 860                         int trace_id;
 861
 862                         ret = close(metafd);
 863                         if (ret < 0) {
 864                                 perror("close");
 865                                 goto error;
 866                         }
 867                         ret = close(dirfd);
 868                         if (ret < 0) {
 869                                 perror("close");
 870                                 goto error;
 871                         }
 872
 873                         trace_id = bt_context_add_trace(ctx,
 874                                 node->fts_accpath, format_str,
 875                                 packet_seek, NULL, NULL);
 876                         if (trace_id < 0) {
 877                                 fprintf(stderr, "[warning] [Context] opening trace \"%s\" from %s "
 878                                         "for reading.\n", node->fts_accpath, path);
 879                                 /* Allow to skip erroneous traces. */
 880                                 continue;
 881                         }
 882                         g_array_append_val(trace_ids, trace_id);
 883                 }
 884         }
 885
 886         g_array_free(trace_ids, TRUE);
 887         return ret;
 888
 889 error:
 890         return ret;
 891 }
 892
 893 static int check_field_requirements(const struct bt_ctf_field_decl *const * field_list,
 894                 int field_cnt, int *tid_check, int *pid_check,
 895                 int *procname_check, int *ppid_check)
 896 {
 897         int j;
 898         struct perfcounter *global;
 899         const char *name;
 900
 901         for (j = 0; j < field_cnt; j++) {
 902                 name = bt_ctf_get_decl_field_name(field_list[j]);
 903                 if (*tid_check == 0) {
 904                         if (strncmp(name, "tid", 3) == 0)
 905                                 (*tid_check)++;
 906                 }
 907                 if (*pid_check == 0) {
 908                         if (strncmp(name, "pid", 3) == 0)
 909                                 (*pid_check)++;
 910                 }
 911                 if (*ppid_check == 0) {
 912                         if (strncmp(name, "ppid", 4) == 0)
 913                                 (*ppid_check)++;
 914                 }
 915                 if (*procname_check == 0) {
 916                         if (strncmp(name, "procname", 8) == 0)
 917                                 (*procname_check)++;
 918                 }
 919                 if (strncmp(name, "perf_", 5) == 0) {
 920                         global = g_hash_table_lookup(global_perf_liszt, (gpointer) name);
 921                         if (!global) {
 922                                 global = g_new0(struct perfcounter, 1);
 923                                 /* by default, sort on the first perf context */
 924                                 if (g_hash_table_size(global_perf_liszt) == 0)
 925                                         global->sort = 1;
 926                                 global->visible = 1;
 927                                 g_hash_table_insert(global_perf_liszt, (gpointer) strdup(name), global);
 928                         }
 929                 }
 930         }
 931
 932         if (*tid_check == 1 && *pid_check == 1 && *ppid_check == 1 &&
 933                         *procname_check == 1)
 934                 return 0;
 935
 936         return -1;
 937 }
 938
 939 /*
 940  * check_requirements: check if the required context informations are available
 941  *
 942  * If each mandatory context information is available for at least in one
 943  * event, return 0 otherwise return -1.
 944  */
 945 int check_requirements(struct bt_context *ctx)
 946 {
 947         unsigned int i, evt_cnt, field_cnt;
 948         struct bt_ctf_event_decl *const * evt_list;
 949         const struct bt_ctf_field_decl *const * field_list;
 950         int tid_check = 0;
 951         int pid_check = 0;
 952         int procname_check = 0;
 953         int ppid_check = 0;
 954         int ret = 0;
 955
 956         ret = bt_ctf_get_event_decl_list(0, ctx, &evt_list, &evt_cnt);
 957         if (ret < 0) {
 958                 goto end;
 959         }
 960
 961         for (i = 0; i < evt_cnt; i++) {
 962                 bt_ctf_get_decl_fields(evt_list[i], BT_STREAM_EVENT_CONTEXT,
 963                                 &field_list, &field_cnt);
 964                 ret = check_field_requirements(field_list, field_cnt,
 965                                 &tid_check, &pid_check, &procname_check,
 966                                 &ppid_check);
 967
 968                 bt_ctf_get_decl_fields(evt_list[i], BT_EVENT_CONTEXT,
 969                                 &field_list, &field_cnt);
 970                 ret = check_field_requirements(field_list, field_cnt,
 971                                 &tid_check, &pid_check, &procname_check,
 972                                 &ppid_check);
 973
 974                 bt_ctf_get_decl_fields(evt_list[i], BT_STREAM_PACKET_CONTEXT,
 975                                 &field_list, &field_cnt);
 976                 ret = check_field_requirements(field_list, field_cnt,
 977                                 &tid_check, &pid_check, &procname_check,
 978                                 &ppid_check);
 979         }
 980
 981         if (tid_check == 0) {
 982                 ret = -1;
 983                 fprintf(stderr, "[error] missing tid context information\n");
 984         }
 985         if (pid_check == 0) {
 986                 ret = -1;
 987                 fprintf(stderr, "[error] missing pid context information\n");
 988         }
 989         if (ppid_check == 0) {
 990                 ret = -1;
 991                 fprintf(stderr, "[error] missing ppid context information\n");
 992         }
 993         if (procname_check == 0) {
 994                 ret = -1;
 995                 fprintf(stderr, "[error] missing procname context information\n");
 996         }
 997
 998 end:
 999         return ret;
1000 }
1001
1002 int main(int argc, char **argv)
1003 {
1004         int ret;
1005         struct bt_context *bt_ctx = NULL;
1006
1007         init_lttngtop();
1008         ret = parse_options(argc, argv);
1009         if (ret < 0) {
1010                 fprintf(stdout, "Error parsing options.\n\n");
1011                 usage(stdout);
1012                 exit(EXIT_FAILURE);
1013         } else if (ret > 0) {
1014                 exit(EXIT_SUCCESS);
1015         }
1016
1017         if (!opt_input_path && !remote_live) {
1018                 /* mmap live */
1019 #ifdef LTTNGTOP_MMAP_LIVE
1020                 if (opt_textdump) {
1021                         signal(SIGTERM, handle_textdump_sigterm);
1022                         signal(SIGINT, handle_textdump_sigterm);
1023                 }
1024                 mmap_live_loop(bt_ctx);
1025                 pthread_join(timer_thread, NULL);
1026                 quit = 1;
1027                 pthread_join(display_thread, NULL);
1028
1029                 lttng_stop_tracing("test");
1030                 lttng_destroy_session("test");
1031
1032                 goto end;
1033 #else
1034                 fprintf(stderr, "Mmap live support not compiled\n");
1035                 goto end;
1036 #endif /* LTTNGTOP_MMAP_LIVE */
1037         } else if (!opt_input_path && remote_live) {
1038                 /* network live */
1039                 ret = setup_network_live(opt_relay_hostname);
1040                 if (ret < 0) {
1041                         goto end;
1042                 }
1043
1044                 ret = open_trace(&bt_ctx);
1045                 if (ret < 0) {
1046                         goto end;
1047                 }
1048         } else {
1049                 //init_lttngtop();
1050
1051                 bt_ctx = bt_context_create();
1052                 ret = bt_context_add_traces_recursive(bt_ctx, opt_input_path, "ctf", NULL);
1053                 if (ret < 0) {
1054                         fprintf(stderr, "[error] Opening the trace\n");
1055                         goto end;
1056                 }
1057         }
1058
1059         ret = check_requirements(bt_ctx);
1060         if (ret < 0) {
1061                 fprintf(stderr, "[error] some mandatory contexts were missing, exiting.\n");
1062                 goto end;
1063         }
1064         if (!opt_textdump) {
1065                 pthread_create(&display_thread, NULL, ncurses_display, (void *) NULL);
1066                 pthread_create(&timer_thread, NULL, refresh_thread, (void *) NULL);
1067         }
1068
1069         iter_trace(bt_ctx);
1070
1071         pthread_join(display_thread, NULL);
1072         quit = 1;
1073         pthread_join(timer_thread, NULL);
1074
1075 end:
1076         if (bt_ctx)
1077                 bt_context_put(bt_ctx);
1078
1079         return 0;
1080 }