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                 if (hostname) {
 262                         printf("%02d:%02d:%02d.%09" PRIu64 " (%s) (cpu %d) [%s (%d)] %s (",
 263                                         start.tm_hour, start.tm_min, start.tm_sec,
 264                                         ts_nsec_start, hostname, cpu_id, procname, pid,
 265                                         bt_ctf_event_name(call_data));
 266                 } else {
 267                         printf("%02d:%02d:%02d.%09" PRIu64 " (cpu %d) [%s (%d)] %s (",
 268                                         start.tm_hour, start.tm_min, start.tm_sec,
 269                                         ts_nsec_start, cpu_id, procname, pid,
 270                                         bt_ctf_event_name(call_data));
 271                 }
 272                 print_fields(call_data);
 273                 printf(") ");
 274                 if (strncmp(bt_ctf_event_name(call_data), "sys_", 4) != 0) {
 275                         printf("\n");
 276                         last_textdump_print_newline = 1;
 277                 } else {
 278                         last_textdump_print_newline = 0;
 279                 }
 280         }
 281
 282 end:
 283         return BT_CB_OK;
 284 error:
 285         return BT_CB_ERROR_STOP;
 286 end_stop:
 287         return BT_CB_OK_STOP;
 288 }
 289
 290 enum bt_cb_ret handle_kprobes(struct bt_ctf_event *call_data, void *private_data)
 291 {
 292         int i;
 293         struct kprobes *kprobe;
 294
 295         /* for kprobes */
 296         for (i = 0; i < lttngtop.kprobes_table->len; i++) {
 297                 kprobe = g_ptr_array_index(lttngtop.kprobes_table, i);
 298                 if (strcmp(bt_ctf_event_name(call_data), kprobe->probe_name) == 0) {
 299                         kprobe->count++;
 300                 }
 301         }
 302
 303         return BT_CB_OK;
 304 }
 305
 306 /*
 307  * hook on each event to check the timestamp and refresh the display if
 308  * necessary
 309  */
 310 enum bt_cb_ret check_timestamp(struct bt_ctf_event *call_data, void *private_data)
 311 {
 312         unsigned long timestamp;
 313
 314         timestamp = bt_ctf_get_timestamp(call_data);
 315         if (timestamp == -1ULL)
 316                 goto error;
 317
 318         /* can happen in network live when tracing is idle */
 319         if (timestamp < last_event_ts)
 320                 goto end_stop;
 321
 322         last_event_ts = timestamp;
 323
 324         if (last_display_update == 0)
 325                 last_display_update = timestamp;
 326
 327         if (timestamp - last_display_update >= refresh_display) {
 328                 sem_wait(&goodtoupdate);
 329                 g_ptr_array_add(copies, get_copy_lttngtop(last_display_update,
 330                                         timestamp));
 331                 sem_post(&goodtodisplay);
 332                 sem_post(&bootstrap);
 333                 last_display_update = timestamp;
 334         }
 335         return BT_CB_OK;
 336
 337 error:
 338         fprintf(stderr, "check_timestamp callback error\n");
 339         return BT_CB_ERROR_STOP;
 340
 341 end_stop:
 342         return BT_CB_OK_STOP;
 343 }
 344
 345 /*
 346  * get_perf_counter : get or create and return a perf_counter struct for
 347  * either a process or a cpu (only one of the 2 parameters mandatory)
 348  */
 349 struct perfcounter *get_perf_counter(const char *name, struct processtop *proc,
 350                 struct cputime *cpu)
 351 {
 352         struct perfcounter *ret;
 353         GHashTable *table;
 354
 355         if (proc)
 356                 table = proc->perf;
 357         else if (cpu)
 358                 table = cpu->perf;
 359         else
 360                 goto error;
 361
 362         ret = g_hash_table_lookup(table, (gpointer) name);
 363         if (ret)
 364                 goto end;
 365
 366         ret = g_new0(struct perfcounter, 1);
 367         /* by default, make it visible in the UI */
 368         ret->visible = 1;
 369         g_hash_table_insert(table, (gpointer) strdup(name), ret);
 370
 371 end:
 372         return ret;
 373
 374 error:
 375         return NULL;
 376 }
 377
 378 void update_perf_value(struct processtop *proc, struct cputime *cpu,
 379                 const char *name, int value)
 380 {
 381         struct perfcounter *cpu_perf, *process_perf;
 382
 383         cpu_perf = get_perf_counter(name, NULL, cpu);
 384         if (cpu_perf->count < value) {
 385                 process_perf = get_perf_counter(name, proc, NULL);
 386                 process_perf->count += value - cpu_perf->count;
 387                 cpu_perf->count = value;
 388         }
 389 }
 390
 391 void extract_perf_counter_scope(const struct bt_ctf_event *event,
 392                 const struct bt_definition *scope,
 393                 struct processtop *proc,
 394                 struct cputime *cpu)
 395 {
 396         struct bt_definition const * const *list = NULL;
 397         const struct bt_definition *field;
 398         unsigned int count;
 399         struct perfcounter *perfcounter;
 400         GHashTableIter iter;
 401         gpointer key;
 402         int ret;
 403
 404         if (!scope)
 405                 goto end;
 406
 407         ret = bt_ctf_get_field_list(event, scope, &list, &count);
 408         if (ret < 0)
 409                 goto end;
 410
 411         if (count == 0)
 412                 goto end;
 413
 414         g_hash_table_iter_init(&iter, global_perf_liszt);
 415         while (g_hash_table_iter_next (&iter, &key, (gpointer) &perfcounter)) {
 416                 field = bt_ctf_get_field(event, scope, (char *) key);
 417                 if (field) {
 418                         int value = bt_ctf_get_uint64(field);
 419                         if (bt_ctf_field_get_error())
 420                                 continue;
 421                         update_perf_value(proc, cpu, (char *) key, value);
 422                 }
 423         }
 424
 425 end:
 426         return;
 427 }
 428
 429 void update_perf_counter(struct processtop *proc, const struct bt_ctf_event *event)
 430 {
 431         struct cputime *cpu;
 432         const struct bt_definition *scope;
 433
 434         cpu = get_cpu(get_cpu_id(event));
 435
 436         scope = bt_ctf_get_top_level_scope(event, BT_STREAM_EVENT_CONTEXT);
 437         extract_perf_counter_scope(event, scope, proc, cpu);
 438
 439         scope = bt_ctf_get_top_level_scope(event, BT_STREAM_PACKET_CONTEXT);
 440         extract_perf_counter_scope(event, scope, proc, cpu);
 441
 442         scope = bt_ctf_get_top_level_scope(event, BT_EVENT_CONTEXT);
 443         extract_perf_counter_scope(event, scope, proc, cpu);
 444 }
 445
 446 enum bt_cb_ret fix_process_table(struct bt_ctf_event *call_data,
 447                 void *private_data)
 448 {
 449         int pid, tid, ppid, vpid, vtid, vppid;
 450         char *comm, *hostname;
 451         struct processtop *parent, *child;
 452         unsigned long timestamp;
 453
 454         timestamp = bt_ctf_get_timestamp(call_data);
 455         if (timestamp == -1ULL)
 456                 goto error;
 457
 458         pid = get_context_pid(call_data);
 459         if (pid == -1ULL) {
 460                 goto error;
 461         }
 462
 463         tid = get_context_tid(call_data);
 464         if (tid == -1ULL) {
 465                 goto error;
 466         }
 467         ppid = get_context_ppid(call_data);
 468         if (ppid == -1ULL) {
 469                 goto error;
 470         }
 471         vpid = get_context_vpid(call_data);
 472         if (pid == -1ULL) {
 473                 vpid = -1;
 474         }
 475         vtid = get_context_vtid(call_data);
 476         if (tid == -1ULL) {
 477                 vtid = -1;
 478         }
 479         vppid = get_context_vppid(call_data);
 480         if (ppid == -1ULL) {
 481                 vppid = -1;
 482         }
 483         comm = get_context_comm(call_data);
 484         if (!comm) {
 485                 goto error;
 486         }
 487         /* optional */
 488         hostname = get_context_hostname(call_data);
 489
 490         /* find or create the current process */
 491         child = find_process_tid(&lttngtop, tid, comm);
 492         if (!child)
 493                 child = add_proc(&lttngtop, tid, comm, timestamp, hostname);
 494         if (!child)
 495                 goto end;
 496         update_proc(child, pid, tid, ppid, vpid, vtid, vppid, comm, hostname);
 497
 498         if (pid != tid) {
 499                 /* find or create the parent */
 500                 parent = find_process_tid(&lttngtop, pid, comm);
 501                 if (!parent) {
 502                         parent = add_proc(&lttngtop, pid, comm, timestamp, hostname);
 503                         if (parent)
 504                                 parent->pid = pid;
 505                 }
 506
 507                 /* attach the parent to the current process */
 508                 child->threadparent = parent;
 509                 add_thread(parent, child);
 510         }
 511
 512         update_perf_counter(child, call_data);
 513
 514 end:
 515         return BT_CB_OK;
 516
 517 error:
 518         return BT_CB_ERROR_STOP;
 519 }
 520
 521 void init_lttngtop()
 522 {
 523         copies = g_ptr_array_new();
 524         global_perf_liszt = g_hash_table_new(g_str_hash, g_str_equal);
 525         global_filter_list = g_hash_table_new(g_str_hash, g_str_equal);
 526         global_host_list = g_hash_table_new(g_str_hash, g_str_equal);
 527
 528         sem_init(&goodtodisplay, 0, 0);
 529         sem_init(&goodtoupdate, 0, 1);
 530         sem_init(&timer, 0, 1);
 531         sem_init(&bootstrap, 0, 0);
 532         sem_init(&pause_sem, 0, 1);
 533         sem_init(&end_trace_sem, 0, 0);
 534
 535         reset_global_counters();
 536         lttngtop.nbproc = 0;
 537         lttngtop.nbthreads = 0;
 538         lttngtop.nbfiles = 0;
 539
 540         lttngtop.process_hash_table = g_hash_table_new(g_direct_hash,
 541                         g_direct_equal);
 542         lttngtop.process_table = g_ptr_array_new();
 543         lttngtop.files_table = g_ptr_array_new();
 544         lttngtop.cpu_table = g_ptr_array_new();
 545
 546         toggle_filter = -1;
 547 }
 548
 549 void usage(FILE *fp)
 550 {
 551         fprintf(fp, "LTTngTop %s\n\n", VERSION);
 552         fprintf(fp, "Usage : lttngtop [OPTIONS] TRACE\n");
 553         fprintf(fp, "  TRACE                    Path to the trace to analyse (-r for network live tracing, nothing for mmap live streaming)\n");
 554         fprintf(fp, "  -h, --help               This help message\n");
 555         fprintf(fp, "  -t, --textdump           Display live events in text-only\n");
 556         fprintf(fp, "  -p, --pid                Comma-separated list of PIDs to display\n");
 557         fprintf(fp, "  -f, --child              Follow threads associated with selected PIDs\n");
 558         fprintf(fp, "  -n, --hostname           Comma-separated list of hostnames to display (require hostname context in trace)\n");
 559         fprintf(fp, "  -k, --kprobes            Comma-separated list of kprobes to insert (same format as lttng enable-event)\n");
 560         fprintf(fp, "  -r, --relay-hostname     Network live streaming : hostname of the lttng-relayd (default port)\n");
 561         fprintf(fp, "  -b, --begin              Network live streaming : read the trace for the beginning of the recording\n");
 562 }
 563
 564 /*
 565  * Parse probe options.
 566  * Shamelessly stolen from lttng-tools :
 567  * src/bin/lttng/commands/enable_events.c
 568  */
 569 static struct kprobes *parse_probe_opts(char *opt)
 570 {
 571         char s_hex[19];
 572         char name[LTTNG_SYMBOL_NAME_LEN];
 573         struct kprobes *kprobe;
 574         int ret;
 575
 576         /*
 577         kprobe->probe_addr = 0;
 578         kprobe->probe_offset = 0;
 579         asprintf(&kprobe->probe_name, "probe_sys_open");
 580         asprintf(&kprobe->symbol_name, "sys_open");
 581         */
 582
 583         if (opt == NULL) {
 584                 kprobe = NULL;
 585                 goto end;
 586         }
 587
 588         kprobe = g_new0(struct kprobes, 1);
 589
 590         /* Check for symbol+offset */
 591         ret = sscanf(opt, "%[^'+']+%s", name, s_hex);
 592         if (ret == 2) {
 593                 ret = asprintf(&kprobe->probe_name, "probe_%s", name);
 594                 ret = asprintf(&kprobe->symbol_name, "%s", name);
 595
 596                 if (strlen(s_hex) == 0) {
 597                         fprintf(stderr, "Invalid probe offset %s", s_hex);
 598                         ret = -1;
 599                         goto end;
 600                 }
 601                 kprobe->probe_offset = strtoul(s_hex, NULL, 0);
 602                 kprobe->probe_addr = 0;
 603                 goto end;
 604         }
 605
 606         /* Check for symbol */
 607         if (isalpha(name[0])) {
 608                 ret = sscanf(opt, "%s", name);
 609                 if (ret == 1) {
 610                         ret = asprintf(&kprobe->probe_name, "probe_%s", name);
 611                         ret = asprintf(&kprobe->symbol_name, "%s", name);
 612                         kprobe->probe_offset = 0;
 613                         kprobe->probe_addr = 0;
 614                         goto end;
 615                 }
 616         }
 617
 618         /* Check for address */
 619         ret = sscanf(opt, "%s", s_hex);
 620         if (ret > 0) {
 621                 if (strlen(s_hex) == 0) {
 622                         fprintf(stderr, "Invalid probe address %s", s_hex);
 623                         ret = -1;
 624                         goto end;
 625                 }
 626                 ret = asprintf(&kprobe->probe_name, "probe_%s", s_hex);
 627                 kprobe->probe_offset = 0;
 628                 kprobe->probe_addr = strtoul(s_hex, NULL, 0);
 629                 goto end;
 630         }
 631
 632         /* No match */
 633         kprobe = NULL;
 634
 635 end:
 636         return kprobe;
 637 }
 638
 639 /*
 640  * Return 0 if caller should continue, < 0 if caller should return
 641  * error, > 0 if caller should exit without reporting error.
 642  */
 643 static int parse_options(int argc, char **argv)
 644 {
 645         poptContext pc;
 646         int opt, ret = 0;
 647         char *tmp_str;
 648         int *tid;
 649
 650         remote_live = 0;
 651
 652         pc = poptGetContext(NULL, argc, (const char **) argv, long_options, 0);
 653         poptReadDefaultConfig(pc, 0);
 654
 655         while ((opt = poptGetNextOpt(pc)) != -1) {
 656                 switch (opt) {
 657                         case OPT_HELP:
 658                                 usage(stdout);
 659                                 ret = 1;    /* exit cleanly */
 660                                 goto end;
 661                         case OPT_TEXTDUMP:
 662                                 opt_textdump = 1;
 663                                 break;
 664                         case OPT_CHILD:
 665                                 opt_child = 1;
 666                                 break;
 667                         case OPT_PID:
 668                                 toggle_filter = 1;
 669                                 tid_filter_list = g_hash_table_new(g_str_hash,
 670                                                 g_str_equal);
 671                                 tmp_str = strtok(opt_tid, ",");
 672                                 while (tmp_str) {
 673                                         tid = malloc(sizeof(int));
 674                                         *tid = atoi(tmp_str);
 675                                         g_hash_table_insert(tid_filter_list,
 676                                                         (gpointer) tid, tid);
 677                                         tmp_str = strtok(NULL, ",");
 678                                 }
 679                                 break;
 680                         case OPT_BEGIN:
 681                                 /* start reading the live trace from the beginning */
 682                                 opt_begin = 1;
 683                                 break;
 684                         case OPT_HOSTNAME:
 685                                 toggle_filter = 1;
 686                                 tmp_str = strtok(opt_hostname, ",");
 687                                 while (tmp_str) {
 688                                         add_hostname_list(tmp_str, 1);
 689                                         tmp_str = strtok(NULL, ",");
 690                                 }
 691                                 break;
 692                         case OPT_RELAY_HOSTNAME:
 693                                 remote_live = 1;
 694                                 break;
 695                         case OPT_KPROBES:
 696                                 lttngtop.kprobes_table = g_ptr_array_new();
 697                                 tmp_str = strtok(opt_kprobes, ",");
 698                                 while (tmp_str) {
 699                                         struct kprobes *kprobe;
 700
 701                                         kprobe = parse_probe_opts(tmp_str);
 702                                         if (kprobe) {
 703                                                 g_ptr_array_add(
 704                                                         lttngtop.kprobes_table,
 705                                                         kprobe);
 706                                         } else {
 707                                                 ret = -EINVAL;
 708                                                 goto end;
 709                                         }
 710                                         tmp_str = strtok(NULL, ",");
 711                                 }
 712                                 break;
 713                         default:
 714                                 ret = -EINVAL;
 715                                 goto end;
 716                 }
 717         }
 718
 719         opt_input_path = poptGetArg(pc);
 720
 721 end:
 722         if (pc) {
 723                 poptFreeContext(pc);
 724         }
 725         return ret;
 726 }
 727
 728 void iter_trace(struct bt_context *bt_ctx)
 729 {
 730         struct bt_ctf_iter *iter;
 731         struct bt_iter_pos begin_pos;
 732         struct kprobes *kprobe;
 733         const struct bt_ctf_event *event;
 734         int i;
 735         int ret = 0;
 736
 737         begin_pos.type = BT_SEEK_BEGIN;
 738         iter = bt_ctf_iter_create(bt_ctx, &begin_pos, NULL);
 739
 740         /* at each event, verify the status of the process table */
 741         bt_ctf_iter_add_callback(iter, 0, NULL, 0,
 742                         fix_process_table,
 743                         NULL, NULL, NULL);
 744         /* to handle the follow child option */
 745         bt_ctf_iter_add_callback(iter,
 746                         g_quark_from_static_string("sched_process_fork"),
 747                         NULL, 0, handle_sched_process_fork, NULL, NULL, NULL);
 748         if (opt_textdump) {
 749                 bt_ctf_iter_add_callback(iter, 0, NULL, 0,
 750                                 print_timestamp,
 751                                 NULL, NULL, NULL);
 752         } else {
 753                 /* at each event check if we need to refresh */
 754                 bt_ctf_iter_add_callback(iter, 0, NULL, 0,
 755                                 check_timestamp,
 756                                 NULL, NULL, NULL);
 757                 /* to handle the scheduling events */
 758                 bt_ctf_iter_add_callback(iter,
 759                                 g_quark_from_static_string("sched_switch"),
 760                                 NULL, 0, handle_sched_switch, NULL, NULL, NULL);
 761                 /* to clean up the process table */
 762                 bt_ctf_iter_add_callback(iter,
 763                                 g_quark_from_static_string("sched_process_free"),
 764                                 NULL, 0, handle_sched_process_free, NULL, NULL, NULL);
 765                 /* to get all the process from the statedumps */
 766                 bt_ctf_iter_add_callback(iter,
 767                                 g_quark_from_static_string(
 768                                         "lttng_statedump_process_state"),
 769                                 NULL, 0, handle_statedump_process_state,
 770                                 NULL, NULL, NULL);
 771
 772                 /* for IO top */
 773                 bt_ctf_iter_add_callback(iter,
 774                                 g_quark_from_static_string("exit_syscall"),
 775                                 NULL, 0, handle_exit_syscall, NULL, NULL, NULL);
 776                 bt_ctf_iter_add_callback(iter,
 777                                 g_quark_from_static_string("sys_write"),
 778                                 NULL, 0, handle_sys_write, NULL, NULL, NULL);
 779                 bt_ctf_iter_add_callback(iter,
 780                                 g_quark_from_static_string("sys_read"),
 781                                 NULL, 0, handle_sys_read, NULL, NULL, NULL);
 782                 bt_ctf_iter_add_callback(iter,
 783                                 g_quark_from_static_string("sys_open"),
 784                                 NULL, 0, handle_sys_open, NULL, NULL, NULL);
 785                 bt_ctf_iter_add_callback(iter,
 786                                 g_quark_from_static_string("sys_close"),
 787                                 NULL, 0, handle_sys_close, NULL, NULL, NULL);
 788                 bt_ctf_iter_add_callback(iter,
 789                                 g_quark_from_static_string(
 790                                         "lttng_statedump_file_descriptor"),
 791                                 NULL, 0, handle_statedump_file_descriptor,
 792                                 NULL, NULL, NULL);
 793
 794                 /* for kprobes */
 795                 if (lttngtop.kprobes_table) {
 796                         for (i = 0; i < lttngtop.kprobes_table->len; i++) {
 797                                 kprobe = g_ptr_array_index(lttngtop.kprobes_table, i);
 798                                 bt_ctf_iter_add_callback(iter,
 799                                                 g_quark_from_static_string(
 800                                                         kprobe->probe_name),
 801                                                 NULL, 0, handle_kprobes,
 802                                                 NULL, NULL, NULL);
 803                         }
 804                 }
 805         }
 806
 807         while ((event = bt_ctf_iter_read_event(iter)) != NULL) {
 808                 if (quit || reload_trace)
 809                         goto end_iter;
 810                 ret = bt_iter_next(bt_ctf_get_iter(iter));
 811                 if (ret < 0)
 812                         goto end_iter;
 813         }
 814
 815         /* block until quit, we reached the end of the trace */
 816         sem_wait(&end_trace_sem);
 817
 818 end_iter:
 819         bt_ctf_iter_destroy(iter);
 820 }
 821
 822 /*
 823  * bt_context_add_traces_recursive: Open a trace recursively
 824  * (copied from BSD code in converter/babeltrace.c)
 825  *
 826  * Find each trace present in the subdirectory starting from the given
 827  * path, and add them to the context. The packet_seek parameter can be
 828  * NULL: this specify to use the default format packet_seek.
 829  *
 830  * Return: 0 on success, nonzero on failure.
 831  * Unable to open toplevel: failure.
 832  * Unable to open some subdirectory or file: warn and continue;
 833  */
 834 int bt_context_add_traces_recursive(struct bt_context *ctx, const char *path,
 835                 const char *format_str,
 836                 void (*packet_seek)(struct bt_stream_pos *pos,
 837                         size_t offset, int whence))
 838 {
 839         FTS *tree;
 840         FTSENT *node;
 841         GArray *trace_ids;
 842         char lpath[PATH_MAX];
 843         char * const paths[2] = { lpath, NULL };
 844         int ret = -1;
 845
 846         if ((strncmp(path, NET4_URL_PREFIX, sizeof(NET4_URL_PREFIX) - 1)) == 0 ||
 847                         (strncmp(path, NET6_URL_PREFIX, sizeof(NET6_URL_PREFIX) - 1)) == 0 ||
 848                         (strncmp(path, NET_URL_PREFIX, sizeof(NET_URL_PREFIX) - 1)) == 0) {
 849                 ret = bt_context_add_trace(ctx,
 850                                 path, format_str, packet_seek, NULL, NULL);
 851                 if (ret < 0) {
 852                         fprintf(stderr, "[warning] [Context] cannot open trace \"%s\" "
 853                                         "for reading.\n", path);
 854                         /* Allow to skip erroneous traces. */
 855                         ret = 1;        /* partial error */
 856                 }
 857                 return ret;
 858         }
 859         /*
 860          * Need to copy path, because fts_open can change it.
 861          * It is the pointer array, not the strings, that are constant.
 862          */
 863         strncpy(lpath, path, PATH_MAX);
 864         lpath[PATH_MAX - 1] = '\0';
 865
 866         tree = fts_open(paths, FTS_NOCHDIR | FTS_LOGICAL, 0);
 867         if (tree == NULL) {
 868                 fprintf(stderr, "[error] [Context] Cannot traverse \"%s\" for reading.\n",
 869                                 path);
 870                 return -EINVAL;
 871         }
 872
 873         trace_ids = g_array_new(FALSE, TRUE, sizeof(int));
 874
 875         while ((node = fts_read(tree))) {
 876                 int dirfd, metafd;
 877
 878                 if (!(node->fts_info & FTS_D))
 879                         continue;
 880
 881                 dirfd = open(node->fts_accpath, 0);
 882                 if (dirfd < 0) {
 883                         fprintf(stderr, "[error] [Context] Unable to open trace "
 884                                 "directory file descriptor.\n");
 885                         ret = dirfd;
 886                         goto error;
 887                 }
 888                 metafd = openat(dirfd, "metadata", O_RDONLY);
 889                 if (metafd < 0) {
 890                         close(dirfd);
 891                         continue;
 892                 } else {
 893                         int trace_id;
 894
 895                         ret = close(metafd);
 896                         if (ret < 0) {
 897                                 perror("close");
 898                                 goto error;
 899                         }
 900                         ret = close(dirfd);
 901                         if (ret < 0) {
 902                                 perror("close");
 903                                 goto error;
 904                         }
 905
 906                         trace_id = bt_context_add_trace(ctx,
 907                                 node->fts_accpath, format_str,
 908                                 packet_seek, NULL, NULL);
 909                         if (trace_id < 0) {
 910                                 fprintf(stderr, "[warning] [Context] opening trace \"%s\" from %s "
 911                                         "for reading.\n", node->fts_accpath, path);
 912                                 /* Allow to skip erroneous traces. */
 913                                 continue;
 914                         }
 915                         g_array_append_val(trace_ids, trace_id);
 916                 }
 917         }
 918
 919         g_array_free(trace_ids, TRUE);
 920         return ret;
 921
 922 error:
 923         return ret;
 924 }
 925
 926 static int check_field_requirements(const struct bt_ctf_field_decl *const * field_list,
 927                 int field_cnt, int *tid_check, int *pid_check,
 928                 int *procname_check, int *ppid_check)
 929 {
 930         int j;
 931         struct perfcounter *global;
 932         const char *name;
 933
 934         for (j = 0; j < field_cnt; j++) {
 935                 name = bt_ctf_get_decl_field_name(field_list[j]);
 936                 if (*tid_check == 0) {
 937                         if (strncmp(name, "tid", 3) == 0)
 938                                 (*tid_check)++;
 939                 }
 940                 if (*pid_check == 0) {
 941                         if (strncmp(name, "pid", 3) == 0)
 942                                 (*pid_check)++;
 943                 }
 944                 if (*ppid_check == 0) {
 945                         if (strncmp(name, "ppid", 4) == 0)
 946                                 (*ppid_check)++;
 947                 }
 948                 if (*procname_check == 0) {
 949                         if (strncmp(name, "procname", 8) == 0)
 950                                 (*procname_check)++;
 951                 }
 952                 if (strncmp(name, "perf_", 5) == 0) {
 953                         global = g_hash_table_lookup(global_perf_liszt, (gpointer) name);
 954                         if (!global) {
 955                                 global = g_new0(struct perfcounter, 1);
 956                                 /* by default, sort on the first perf context */
 957                                 if (g_hash_table_size(global_perf_liszt) == 0)
 958                                         global->sort = 1;
 959                                 global->visible = 1;
 960                                 g_hash_table_insert(global_perf_liszt, (gpointer) strdup(name), global);
 961                         }
 962                 }
 963         }
 964
 965         if (*tid_check == 1 && *pid_check == 1 && *ppid_check == 1 &&
 966                         *procname_check == 1)
 967                 return 0;
 968
 969         return -1;
 970 }
 971
 972 /*
 973  * check_requirements: check if the required context informations are available
 974  *
 975  * If each mandatory context information is available for at least in one
 976  * event, return 0 otherwise return -1.
 977  */
 978 int check_requirements(struct bt_context *ctx)
 979 {
 980         unsigned int i, evt_cnt, field_cnt;
 981         struct bt_ctf_event_decl *const * evt_list;
 982         const struct bt_ctf_field_decl *const * field_list;
 983         int tid_check = 0;
 984         int pid_check = 0;
 985         int procname_check = 0;
 986         int ppid_check = 0;
 987         int ret = 0;
 988
 989         ret = bt_ctf_get_event_decl_list(0, ctx, &evt_list, &evt_cnt);
 990         if (ret < 0) {
 991                 goto end;
 992         }
 993
 994         for (i = 0; i < evt_cnt; i++) {
 995                 bt_ctf_get_decl_fields(evt_list[i], BT_STREAM_EVENT_CONTEXT,
 996                                 &field_list, &field_cnt);
 997                 ret = check_field_requirements(field_list, field_cnt,
 998                                 &tid_check, &pid_check, &procname_check,
 999                                 &ppid_check);
1000
1001                 bt_ctf_get_decl_fields(evt_list[i], BT_EVENT_CONTEXT,
1002                                 &field_list, &field_cnt);
1003                 ret = check_field_requirements(field_list, field_cnt,
1004                                 &tid_check, &pid_check, &procname_check,
1005                                 &ppid_check);
1006
1007                 bt_ctf_get_decl_fields(evt_list[i], BT_STREAM_PACKET_CONTEXT,
1008                                 &field_list, &field_cnt);
1009                 ret = check_field_requirements(field_list, field_cnt,
1010                                 &tid_check, &pid_check, &procname_check,
1011                                 &ppid_check);
1012         }
1013
1014         if (tid_check == 0) {
1015                 ret = -1;
1016                 fprintf(stderr, "[error] missing tid context information\n");
1017         }
1018         if (pid_check == 0) {
1019                 ret = -1;
1020                 fprintf(stderr, "[error] missing pid context information\n");
1021         }
1022         if (ppid_check == 0) {
1023                 ret = -1;
1024                 fprintf(stderr, "[error] missing ppid context information\n");
1025         }
1026         if (procname_check == 0) {
1027                 ret = -1;
1028                 fprintf(stderr, "[error] missing procname context information\n");
1029         }
1030
1031 end:
1032         return ret;
1033 }
1034
1035 int main(int argc, char **argv)
1036 {
1037         int ret;
1038         struct bt_context *bt_ctx = NULL;
1039
1040         init_lttngtop();
1041         ret = parse_options(argc, argv);
1042         if (ret < 0) {
1043                 fprintf(stdout, "Error parsing options.\n\n");
1044                 usage(stdout);
1045                 exit(EXIT_FAILURE);
1046         } else if (ret > 0) {
1047                 exit(EXIT_SUCCESS);
1048         }
1049
1050         if (!opt_input_path && !remote_live) {
1051                 /* mmap live */
1052 #ifdef LTTNGTOP_MMAP_LIVE
1053                 if (opt_textdump) {
1054                         signal(SIGTERM, handle_textdump_sigterm);
1055                         signal(SIGINT, handle_textdump_sigterm);
1056                 }
1057                 mmap_live_loop(bt_ctx);
1058                 pthread_join(timer_thread, NULL);
1059                 quit = 1;
1060                 pthread_join(display_thread, NULL);
1061
1062                 lttng_stop_tracing("test");
1063                 lttng_destroy_session("test");
1064
1065                 goto end;
1066 #else
1067                 fprintf(stderr, "[ERROR] Mmap live support not compiled, specify a "
1068                                 "trace directory or -r <relayd hostname/IP>\n");
1069                 usage(stdout);
1070                 ret = -1;
1071                 goto end;
1072 #endif /* LTTNGTOP_MMAP_LIVE */
1073         } else if (!opt_input_path && remote_live) {
1074                 /* network live */
1075 #if 0
1076                 ret = setup_network_live(opt_relay_hostname, opt_begin);
1077                 if (ret < 0) {
1078                         goto end;
1079                 }
1080
1081                 ret = open_trace(&bt_ctx);
1082                 if (ret < 0) {
1083                         goto end;
1084                 }
1085 #endif
1086
1087                 bt_ctx = bt_context_create();
1088                 ret = bt_context_add_traces_recursive(bt_ctx, opt_relay_hostname,
1089                                 "lttng-live", NULL);
1090                 if (ret < 0) {
1091                         fprintf(stderr, "[error] Opening the trace\n");
1092                         goto end;
1093                 }
1094         } else {
1095                 //init_lttngtop();
1096
1097                 bt_ctx = bt_context_create();
1098                 ret = bt_context_add_traces_recursive(bt_ctx, opt_input_path, "ctf", NULL);
1099                 if (ret < 0) {
1100                         fprintf(stderr, "[error] Opening the trace\n");
1101                         goto end;
1102                 }
1103
1104                 ret = check_requirements(bt_ctx);
1105                 if (ret < 0) {
1106                         fprintf(stderr, "[error] some mandatory contexts "
1107                                         "were missing, exiting.\n");
1108                         goto end;
1109                 }
1110
1111                 if (!opt_textdump) {
1112                         pthread_create(&display_thread, NULL, ncurses_display,
1113                                         (void *) NULL);
1114                         pthread_create(&timer_thread, NULL, refresh_thread,
1115                                         (void *) NULL);
1116                 }
1117
1118                 iter_trace(bt_ctx);
1119         }
1120
1121
1122         pthread_join(display_thread, NULL);
1123         quit = 1;
1124         pthread_join(timer_thread, NULL);
1125
1126         ret = 0;
1127
1128 end:
1129         if (bt_ctx)
1130                 bt_context_put(bt_ctx);
1131
1132         return ret;
1133 }