src/lttngtop.c

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