lttv/lttv/traceset.c

   1 /* This file is part of the Linux Trace Toolkit viewer
   2  * Copyright (C) 2003-2004 Michel Dagenais
   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
  14  * along with this program; if not, write to the Free Software
  15  * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
  16  * MA 02111-1307, USA.
  17  */
  18
  19 #ifdef HAVE_CONFIG_H
  20 #include <config.h>
  21 #endif
  22
  23 #include <lttv/traceset.h>
  24 #include <lttv/iattribute.h>
  25 #include <lttv/state.h>
  26 #include <lttv/event.h>
  27 #include <lttv/hook.h>
  28 #include <stdio.h>
  29 #include <babeltrace/babeltrace.h>
  30 #include <babeltrace/context.h>
  31 #include <babeltrace/ctf/iterator.h>
  32 #include <babeltrace/ctf/events.h>
  33
  34 /* To traverse a tree recursively */
  35 #include <fcntl.h>
  36 #include <fts.h>
  37 /* For the use of realpath*/
  38 #include <limits.h>
  39 #include <stdlib.h>
  40 /* For strcpy*/
  41 #include <string.h>
  42
  43 /* A trace is a sequence of events gathered in the same tracing session. The
  44    events may be stored in several tracefiles in the same directory.
  45    A trace set is defined when several traces are to be analyzed together,
  46    possibly to study the interactions between events in the different traces.
  47 */
  48
  49
  50 LttvTraceset *lttv_traceset_new(void)
  51 {
  52         LttvTraceset *ts;
  53         struct bt_iter_pos begin_pos;
  54
  55         ts = g_new(LttvTraceset, 1);
  56         ts->filename = NULL;
  57         ts->traces = g_ptr_array_new();
  58         ts->context = bt_context_create();
  59         ts->a = g_object_new(LTTV_ATTRIBUTE_TYPE, NULL);
  60         //TODO remove this when we have really mecanism
  61         //s->tmpState = g_new(LttvTraceState *, 1);
  62         //lttv_trace_state_init(s->tmpState,0);
  63
  64         /*Initialize iterator to the beginning of the traces*/
  65         begin_pos.type = BT_SEEK_BEGIN;
  66         ts->iter = bt_ctf_iter_create(ts->context, &begin_pos, NULL);
  67
  68         ts->event_hooks = lttv_hooks_new();
  69
  70         ts->state_trace_handle_index = g_ptr_array_new();
  71         ts->has_precomputed_states = FALSE;
  72
  73         return ts;
  74 }
  75
  76 char * lttv_traceset_name(LttvTraceset * s)
  77 {
  78         return s->filename;
  79 }
  80
  81 #ifdef BABEL_CLEANUP
  82 LttvTrace *lttv_trace_new(LttTrace *t)
  83 {
  84         LttvTrace *new_trace;
  85
  86         new_trace = g_new(LttvTrace, 1);
  87         new_trace->a = g_object_new(LTTV_ATTRIBUTE_TYPE, NULL);
  88         new_trace->id = t;
  89         new_trace->ref_count = 0;
  90         return new_trace;
  91 }
  92 #endif
  93 /*
  94  * get_absolute_pathname : Return the unique pathname in the system
  95  *
  96  * pathname is the relative path.
  97  *
  98  * abs_pathname is being set to the absolute path.
  99  *
 100  */
 101 void get_absolute_pathname(const gchar *pathname, gchar * abs_pathname)
 102 {
 103   abs_pathname[0] = '\0';
 104
 105   if (realpath(pathname, abs_pathname) != NULL)
 106     return;
 107   else
 108   {
 109     /* error, return the original path unmodified */
 110     strcpy(abs_pathname, pathname);
 111     return;
 112   }
 113   return;
 114 }
 115
 116
 117
 118 /*
 119  * lttv_trace_create : Create a trace from a path
 120  *
 121  * ts is the traceset in which will be contained the trace
 122  *
 123  * path is the path where to find a trace. It is not recursive.
 124  *
 125  * This function is static since a trace should always be contained in a
 126  * traceset.
 127  *
 128  * return the created trace or NULL on failure
 129  */
 130 static LttvTrace *lttv_trace_create(LttvTraceset *ts, const char *path)
 131 {
 132         int id = bt_context_add_trace(lttv_traceset_get_context(ts),
 133                 path,
 134                 "ctf",
 135                 NULL,
 136                 NULL,
 137                 NULL);
 138         if (id < 0) {
 139                 return NULL;
 140         }
 141         // Create the trace and save the trace handle id returned by babeltrace
 142         LttvTrace *new_trace;
 143
 144         new_trace = g_new(LttvTrace, 1);
 145         new_trace->a = g_object_new(LTTV_ATTRIBUTE_TYPE, NULL);
 146         new_trace->id = id;
 147         new_trace->ref_count = 0;
 148         new_trace->traceset = ts;
 149         new_trace->state = g_new(LttvTraceState,1);
 150         lttv_trace_state_init(new_trace->state,new_trace);
 151
 152         /* Add the state to the trace_handle to state index */
 153         g_ptr_array_set_size(ts->state_trace_handle_index,id+1);
 154         g_ptr_array_index(ts->state_trace_handle_index,id) = new_trace->state;
 155
 156         return new_trace;
 157 }
 158
 159 /*
 160  * lttv_trace_create : Create and add a single trace to a traceset
 161  *
 162  * ts is the traceset in which will be contained the trace
 163  *
 164  * path is the path where to find a trace. It is not recursive.
 165  *
 166  * return a positive integer (>=0)on success or -1 on failure
 167  */
 168 static int lttv_traceset_create_trace(LttvTraceset *ts, const char *path)
 169 {
 170         LttvTrace *trace = lttv_trace_create(ts, path);
 171         if (trace == NULL) {
 172                 return -1;
 173         }
 174         lttv_traceset_add(ts, trace);
 175         return 0;
 176 }
 177
 178 LttvTraceset *lttv_traceset_copy(LttvTraceset *s_orig)
 179 {
 180         guint i;
 181         LttvTraceset *s;
 182         LttvTrace * trace;
 183
 184         s = g_new(LttvTraceset, 1);
 185         s->filename = NULL;
 186         s->traces = g_ptr_array_new();
 187         s->state_trace_handle_index = g_ptr_array_new();
 188         for(i=0;i<s_orig->traces->len;i++)
 189         {
 190                 trace = g_ptr_array_index(s_orig->traces, i);
 191                 trace->ref_count++;
 192
 193                 /* WARNING: this is an alias, not a copy. */
 194                 g_ptr_array_add(s->traces, trace);
 195
 196                 g_ptr_array_set_size(s->state_trace_handle_index,trace->id+1);
 197                 g_ptr_array_index(s->state_trace_handle_index,trace->id) = trace->state;
 198
 199         }
 200         s->context = s_orig->context;
 201         bt_context_get(s->context);
 202         s->a = LTTV_ATTRIBUTE(lttv_iattribute_deep_copy(LTTV_IATTRIBUTE(s_orig->a)));
 203         return s;
 204 }
 205
 206
 207 LttvTraceset *lttv_traceset_load(const gchar *filename)
 208 {
 209         LttvTraceset *s = g_new(LttvTraceset,1);
 210         FILE *tf;
 211
 212         s->filename = g_strdup(filename);
 213         tf = fopen(filename,"r");
 214
 215         g_critical("NOT IMPLEMENTED : load traceset data from a XML file");
 216
 217         fclose(tf);
 218         return s;
 219 }
 220
 221 gint lttv_traceset_save(LttvTraceset *s)
 222 {
 223         FILE *tf;
 224
 225         tf = fopen(s->filename, "w");
 226
 227         g_critical("NOT IMPLEMENTED : save traceset data in a XML file");
 228
 229         fclose(tf);
 230         return 0;
 231 }
 232
 233 void lttv_traceset_destroy(LttvTraceset *s)
 234 {
 235         guint i;
 236
 237         for(i=0;i<s->traces->len;i++) {
 238                 LttvTrace *trace = g_ptr_array_index(s->traces, i);
 239                 lttv_trace_unref(trace);
 240                 // todo mdenis 2012-03-27: uncomment when babeltrace gets fixed
 241                 //bt_context_remove_trace(lttv_traceset_get_context(s), trace->id);
 242                 if(lttv_trace_get_ref_number(trace) == 0)
 243                         lttv_trace_destroy(trace);
 244         }
 245         g_ptr_array_free(s->traces, TRUE);
 246         bt_context_put(s->context);
 247         g_object_unref(s->a);
 248         g_free(s);
 249 }
 250
 251 struct bt_context *lttv_traceset_get_context(LttvTraceset *s)
 252 {
 253         return s->context;
 254 }
 255
 256 LttvTraceset *lttv_trace_get_traceset(LttvTrace *trace)
 257 {
 258         return trace->traceset;
 259 }
 260
 261 LttvHooks *lttv_traceset_get_hooks(LttvTraceset *s)
 262 {
 263         return s->event_hooks;
 264 }
 265
 266 void lttv_trace_destroy(LttvTrace *t)
 267 {
 268         g_object_unref(t->a);
 269         g_free(t);
 270 }
 271
 272 void lttv_traceset_add(LttvTraceset *s, LttvTrace *t)
 273 {
 274         t->ref_count++;
 275         g_ptr_array_add(s->traces, t);
 276 }
 277
 278 int lttv_traceset_add_path(LttvTraceset *ts, char *trace_path)
 279 {
 280         FTS *tree;
 281         FTSENT *node;
 282         char * const paths[2] = { trace_path, NULL };
 283         int ret = -1;
 284
 285         gboolean metaFileFound = FALSE;
 286
 287         tree = fts_open(paths, FTS_NOCHDIR | FTS_LOGICAL, 0);
 288         if (tree == NULL) {
 289                 g_warning("Cannot traverse \"%s\" for reading.\n",
 290                                 trace_path);
 291                 return ret;
 292         }
 293
 294         int dirfd, metafd;
 295         while ((node = fts_read(tree))) {
 296
 297                 if (!(node->fts_info & FTS_D))
 298                         continue;
 299
 300                 dirfd = open(node->fts_accpath, 0);
 301                 if (dirfd < 0) {
 302                         g_warning("Unable to open trace "
 303                                         "directory file descriptor : %s.", node->fts_accpath);
 304                         ret = dirfd;
 305                         goto error;
 306                 }
 307
 308                 // Check if a metadata file exists in the current directory
 309                 metafd = openat(dirfd, "metadata", O_RDONLY);
 310                 if (metafd < 0) {
 311                         ret = close(dirfd);
 312                         if (ret < 0) {
 313                                 g_warning("Unable to open metadata "
 314                                                 "file descriptor : %s.", node->fts_accpath);
 315                                 goto error;
 316                         }
 317                 } else {
 318                         ret = close(metafd);
 319                         if (ret < 0) {
 320                                 g_warning("Unable to close metadata "
 321                                                 "file descriptor : %s.", node->fts_accpath);
 322                                 goto error;
 323                         }
 324                         ret = close(dirfd);
 325                         if (ret < 0) {
 326                                 g_warning("Unable to close trace "
 327                                                 "directory file descriptor : %s.", node->fts_accpath);
 328                                 goto error;
 329                         }
 330
 331                         ret = lttv_traceset_create_trace(ts, node->fts_accpath);
 332                         if (ret < 0) {
 333                                 g_warning("Opening trace \"%s\" from %s "
 334                                                 "for reading.", node->fts_accpath, trace_path);
 335                                 goto error;
 336                         }
 337                         metaFileFound = TRUE;
 338                 }
 339         }
 340
 341 error:
 342         ret = fts_close(tree);
 343         if (ret < 0) {
 344                 g_warning("Unable to close tree  "
 345                                 "file descriptor : %s.", trace_path);
 346         }
 347         if(metaFileFound)
 348           return ret;
 349         else
 350           return -1;
 351 }
 352
 353
 354 unsigned lttv_traceset_number(LttvTraceset *s)
 355 {
 356         return s->traces->len;
 357 }
 358
 359
 360 LttvTrace *lttv_traceset_get(LttvTraceset *s, unsigned i)
 361 {
 362         g_assert(s->traces->len > i);
 363         return ((LttvTrace *)s->traces->pdata[i]);
 364 }
 365
 366
 367 void lttv_traceset_remove(LttvTraceset *s, unsigned i)
 368 {
 369         LttvTrace * t;
 370         g_assert(s->traces->len > i);
 371         t = (LttvTrace *)s->traces->pdata[i];
 372         t->ref_count--;
 373         bt_context_remove_trace(lttv_traceset_get_context(s), t->id);
 374         g_ptr_array_remove_index(s->traces, i);
 375 }
 376
 377
 378 /* A set of attributes is attached to each trace set, trace and tracefile
 379          to store user defined data as needed. */
 380
 381 LttvAttribute *lttv_traceset_attribute(LttvTraceset *s)
 382 {
 383         return s->a;
 384 }
 385
 386
 387 LttvAttribute *lttv_trace_attribute(LttvTrace *t)
 388 {
 389         return t->a;
 390 }
 391
 392
 393 gint lttv_trace_get_id(LttvTrace *t)
 394 {
 395         return t->id;
 396 }
 397
 398 guint lttv_trace_get_ref_number(LttvTrace * t)
 399 {
 400         // todo mdenis: adapt to babeltrace
 401         return t->ref_count;
 402 }
 403
 404 guint lttv_trace_ref(LttvTrace * t)
 405 {
 406         t->ref_count++;
 407
 408         return t->ref_count;
 409 }
 410
 411 guint lttv_trace_unref(LttvTrace * t)
 412 {
 413         if(likely(t->ref_count > 0))
 414                 t->ref_count--;
 415
 416         return t->ref_count;
 417 }
 418
 419 guint lttv_trace_get_num_cpu(LttvTrace *t)
 420 {
 421 #warning "TODO - Set the right number of CPU"
 422         return 24;
 423 }
 424
 425 LttvTracesetPosition *lttv_traceset_create_current_position(LttvTraceset *traceset)
 426 {
 427         LttvTracesetPosition *traceset_pos;
 428
 429         traceset_pos = g_new(LttvTracesetPosition, 1);
 430
 431         /* Check if the new passed */
 432         if(traceset_pos == NULL) {
 433                 return NULL;
 434         }
 435
 436         traceset_pos->iter = traceset->iter;
 437         traceset_pos->bt_pos = bt_iter_get_pos(bt_ctf_get_iter(traceset->iter));
 438
 439         return traceset_pos;
 440 }
 441
 442 LttvTracesetPosition *lttv_traceset_create_time_position(LttvTraceset *traceset,
 443                                                                 LttTime timestamp)
 444 {
 445         LttvTracesetPosition *traceset_pos;
 446
 447         traceset_pos = g_new(LttvTracesetPosition, 1);
 448
 449         /* Check if the new passed */
 450         if(traceset_pos == NULL) {
 451                 return NULL;
 452         }
 453
 454         traceset_pos->iter = traceset->iter;
 455         traceset_pos->bt_pos = bt_iter_create_time_pos(
 456                                         bt_ctf_get_iter(traceset_pos->iter),
 457                                         ltt_time_to_uint64(timestamp));
 458
 459         return traceset_pos;
 460 }
 461
 462 void lttv_traceset_destroy_position(LttvTracesetPosition *traceset_pos)
 463 {
 464         bt_iter_free_pos(traceset_pos->bt_pos);
 465         g_free(traceset_pos);
 466 }
 467
 468 void lttv_traceset_seek_to_position(const LttvTracesetPosition *traceset_pos)
 469 {
 470         bt_iter_set_pos(bt_ctf_get_iter(traceset_pos->iter), traceset_pos->bt_pos);
 471 }
 472
 473 guint lttv_traceset_get_cpuid_from_event(LttvEvent *event)
 474 {
 475         unsigned long timestamp;
 476         unsigned int cpu_id;
 477
 478         struct bt_ctf_event *ctf_event = event->bt_event;
 479         timestamp = bt_ctf_get_timestamp(ctf_event);
 480         if (timestamp == -1ULL) {
 481                 return 0;
 482         }
 483         const struct definition *scope = bt_ctf_get_top_level_scope(ctf_event, BT_STREAM_PACKET_CONTEXT);
 484         if (bt_ctf_field_get_error()) {
 485                 return 0;
 486         }
 487         cpu_id = bt_ctf_get_uint64(bt_ctf_get_field(ctf_event, scope, "cpu_id"));
 488         if (bt_ctf_field_get_error()) {
 489                 return 0;
 490         } else {
 491                 return cpu_id;
 492         }
 493 }
 494
 495 guint64 lttv_traceset_get_timestamp_first_event(LttvTraceset *ts)
 496 {
 497         LttvTracesetPosition begin_position;
 498         struct bt_iter_pos pos;
 499         begin_position.bt_pos = &pos;
 500
 501          /* Assign iterator to the beginning of the traces */
 502         begin_position.bt_pos->type = BT_SEEK_BEGIN;
 503         begin_position.iter = ts->iter;
 504
 505         return lttv_traceset_position_get_timestamp(&begin_position);
 506 }
 507
 508 /*
 509  * lttv_traceset_get_timestamp_begin : returns the  minimum timestamp of
 510  * all the traces in the traceset.
 511  *
 512  */
 513 guint64 lttv_traceset_get_timestamp_begin(LttvTraceset *traceset)
 514 {
 515         struct bt_context *bt_ctx;
 516         bt_ctx = lttv_traceset_get_context(traceset);
 517         guint64 timestamp_min, timestamp_cur = 0;
 518         int i;
 519         int trace_count;
 520         LttvTrace *currentTrace;
 521         trace_count = traceset->traces->len;
 522         if(trace_count == 0)
 523                 timestamp_min = 0;
 524         else{
 525                 timestamp_min = G_MAXUINT64;
 526                 for(i = 0; i < trace_count;i++)
 527                 {
 528                         currentTrace = g_ptr_array_index(traceset->traces,i);
 529                         timestamp_cur = bt_trace_handle_get_timestamp_begin(bt_ctx,
 530                                                                         currentTrace->id);
 531                         if(timestamp_cur < timestamp_min)
 532                                 timestamp_min = timestamp_cur;
 533                 }
 534         }
 535         return timestamp_min;
 536 }
 537
 538 /*
 539  * lttv_traceset_get_timestamp_end: returns the maximum timestamp of
 540  * all the traces in the traceset.
 541  *
 542  */
 543 guint64 lttv_traceset_get_timestamp_end(LttvTraceset *traceset)
 544 {
 545         struct bt_context *bt_ctx;
 546         bt_ctx = lttv_traceset_get_context(traceset);
 547         guint64 timestamp_max, timestamp_cur = 0;
 548         int i;
 549         int trace_count;
 550         LttvTrace *currentTrace;
 551         trace_count = traceset->traces->len;
 552
 553         if(trace_count == 0){
 554                 timestamp_max = 1;
 555         }
 556         else{
 557                 timestamp_max = 0;
 558                 for(i =0; i < trace_count;i++)
 559                 {
 560                         currentTrace = g_ptr_array_index(traceset->traces,i);
 561                         timestamp_cur = bt_trace_handle_get_timestamp_end(bt_ctx,
 562                                                                           currentTrace->id);
 563                         if(timestamp_cur > timestamp_max){
 564                                 timestamp_max = timestamp_cur;
 565                         }
 566                 }
 567         }
 568         return timestamp_max;
 569 }
 570 /*
 571  * lttv_traceset_get_time_span_real : return a TimeInterval representing the
 572  * minimum timestamp dans le maximum timestamp of the traceset.
 573  *
 574  */
 575 TimeInterval lttv_traceset_get_time_span_real(LttvTraceset *ts)
 576 {
 577         TimeInterval time_span;
 578         time_span.start_time =ltt_time_from_uint64(lttv_traceset_get_timestamp_first_event(ts));
 579         time_span.end_time = ltt_time_from_uint64(lttv_traceset_get_timestamp_end(ts));
 580         return time_span;
 581 }
 582
 583 /*
 584  * lttv_traceset_get_time_span : return a TimeInterval representing the
 585  * minimum timestamp dans le maximum timestamp of the traceset.
 586  *
 587  */
 588 TimeInterval lttv_traceset_get_time_span(LttvTraceset *ts)
 589 {
 590         TimeInterval time_span;
 591         time_span.start_time =ltt_time_from_uint64(lttv_traceset_get_timestamp_begin(ts));
 592         time_span.end_time = ltt_time_from_uint64(lttv_traceset_get_timestamp_end(ts));
 593         return time_span;
 594 }
 595
 596 const char *lttv_traceset_get_name_from_event(LttvEvent *event)
 597 {
 598         return bt_ctf_event_name(event->bt_event);
 599 }
 600
 601 guint64 lttv_traceset_position_get_timestamp(const LttvTracesetPosition *pos)
 602 {
 603         guint64 timestamp = 0;
 604         /*We save the current iterator,so we can reassign it after the seek*/
 605         LttvTracesetPosition previous_pos;
 606         previous_pos.iter = pos->iter;
 607         previous_pos.bt_pos = bt_iter_get_pos(bt_ctf_get_iter(pos->iter));
 608         /* Seek to the new desired position */
 609         lttv_traceset_seek_to_position(pos);
 610         /*Read the event*/
 611         struct bt_ctf_event *event = bt_ctf_iter_read_event(pos->iter);
 612
 613         if(event != NULL){
 614                 timestamp = bt_ctf_get_timestamp_raw(event);
 615         }
 616         /* Reassign the previously saved position */
 617         lttv_traceset_seek_to_position(&previous_pos);
 618         /*We must desallocate because the function bt_iter_get_pos() does a g_new */
 619         bt_iter_free_pos(previous_pos.bt_pos);
 620         return timestamp;
 621 }
 622
 623 LttTime  lttv_traceset_position_get_time(const LttvTracesetPosition *pos)
 624 {
 625         return ltt_time_from_uint64(lttv_traceset_position_get_timestamp(pos));
 626 }
 627
 628
 629
 630 int lttv_traceset_position_compare(const LttvTracesetPosition *pos1, const LttvTracesetPosition *pos2)
 631 {
 632 #warning " TODO :Rename for lttv_traceset_position_equals && Must return COMPARAISON OF THE 2 POSITION && verify if it is the best way to compare position"
 633         if(pos1 == NULL || pos2 == NULL){
 634                 return -1;
 635         }
 636
 637         guint64 timeStampPos1,timeStampPos2;
 638         guint cpuId1, cpuId2;
 639         LttvEvent event1, event2;
 640         int ret;
 641
 642         timeStampPos1 = lttv_traceset_position_get_timestamp(pos1);
 643         timeStampPos2 = lttv_traceset_position_get_timestamp(pos2);
 644
 645         event1.bt_event = bt_ctf_iter_read_event(pos1->iter);
 646         event2.bt_event = bt_ctf_iter_read_event(pos2->iter);
 647
 648         if(event1.bt_event == NULL || event2.bt_event == NULL){
 649                 return -1;
 650         }
 651
 652         cpuId1 = lttv_traceset_get_cpuid_from_event(&event1);
 653         cpuId2 = lttv_traceset_get_cpuid_from_event(&event2);
 654
 655         if(timeStampPos1 == timeStampPos2 && cpuId1 == cpuId2){
 656                 return 0;
 657         }
 658         else{
 659                 return 1;
 660         }
 661 }
 662
 663 int lttv_traceset_position_time_compare(const LttvTracesetPosition *pos1,
 664                                         const LttvTracesetPosition *pos2)
 665 {
 666         guint64 timeStampPos1,timeStampPos2;
 667
 668         timeStampPos1 = lttv_traceset_position_get_timestamp(pos1);
 669         timeStampPos2 = lttv_traceset_position_get_timestamp(pos2);
 670
 671         return timeStampPos1 - timeStampPos2;
 672 }
 673 int lttv_traceset_position_compare_current(const LttvTraceset *ts,
 674                                            const LttvTracesetPosition *pos)
 675 {
 676         int result = 0;
 677         LttvTracesetPosition *curPos = lttv_traceset_create_current_position(ts);
 678
 679         result = lttv_traceset_position_compare(curPos,pos);
 680
 681         lttv_traceset_destroy_position(curPos);
 682
 683         return result;
 684 }
 685
 686 LttTime lttv_traceset_get_current_time(const LttvTraceset *ts)
 687 {
 688         LttvTracesetPosition *curPos = lttv_traceset_create_current_position(ts);
 689         guint64 currentTimestamp = lttv_traceset_position_get_timestamp(curPos);
 690         lttv_traceset_destroy_position(curPos);
 691
 692         return ltt_time_from_uint64(currentTimestamp);
 693 }