formats/ctf/ctf.c

   1 /*
   2  * BabelTrace - Common Trace Format (CTF)
   3  *
   4  * Format registration.
   5  *
   6  * Copyright 2010-2011 EfficiOS Inc. and Linux Foundation
   7  *
   8  * Author: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   9  *
  10  * Permission is hereby granted, free of charge, to any person obtaining a copy
  11  * of this software and associated documentation files (the "Software"), to deal
  12  * in the Software without restriction, including without limitation the rights
  13  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  14  * copies of the Software, and to permit persons to whom the Software is
  15  * furnished to do so, subject to the following conditions:
  16  *
  17  * The above copyright notice and this permission notice shall be included in
  18  * all copies or substantial portions of the Software.
  19  *
  20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  21  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  23  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  24  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  25  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  26  * SOFTWARE.
  27  */
  28
  29 #include <babeltrace/format.h>
  30 #include <babeltrace/ctf/types.h>
  31 #include <babeltrace/ctf/metadata.h>
  32 #include <babeltrace/babeltrace-internal.h>
  33 #include <babeltrace/ctf/events-internal.h>
  34 #include <babeltrace/trace-handle-internal.h>
  35 #include <babeltrace/context-internal.h>
  36 #include <babeltrace/uuid.h>
  37 #include <babeltrace/endian.h>
  38 #include <inttypes.h>
  39 #include <stdio.h>
  40 #include <sys/mman.h>
  41 #include <errno.h>
  42 #include <sys/types.h>
  43 #include <sys/stat.h>
  44 #include <fcntl.h>
  45 #include <dirent.h>
  46 #include <glib.h>
  47 #include <unistd.h>
  48 #include <stdlib.h>
  49
  50 #include "metadata/ctf-scanner.h"
  51 #include "metadata/ctf-parser.h"
  52 #include "metadata/ctf-ast.h"
  53 #include "events-private.h"
  54 #include "memstream.h"
  55
  56 /*
  57  * We currently simply map a page to read the packet header and packet
  58  * context to get the packet length and content length. (in bits)
  59  */
  60 #define MAX_PACKET_HEADER_LEN   (getpagesize() * CHAR_BIT)
  61 #define WRITE_PACKET_LEN        (getpagesize() * 8 * CHAR_BIT)
  62
  63 #ifndef min
  64 #define min(a, b)       (((a) < (b)) ? (a) : (b))
  65 #endif
  66
  67 #define NSEC_PER_SEC 1000000000ULL
  68
  69 int opt_clock_cycles,
  70         opt_clock_seconds,
  71         opt_clock_date,
  72         opt_clock_gmt;
  73
  74 uint64_t opt_clock_offset;
  75
  76 extern int yydebug;
  77
  78 static
  79 struct trace_descriptor *ctf_open_trace(const char *path, int flags,
  80                 void (*packet_seek)(struct stream_pos *pos, size_t index,
  81                         int whence),
  82                 FILE *metadata_fp);
  83 static
  84 struct trace_descriptor *ctf_open_mmap_trace(
  85                 struct mmap_stream_list *mmap_list,
  86                 void (*packet_seek)(struct stream_pos *pos, size_t index,
  87                         int whence),
  88                 FILE *metadata_fp);
  89 static
  90 void ctf_set_context(struct trace_descriptor *descriptor,
  91                 struct bt_context *ctx);
  92 static
  93 void ctf_set_handle(struct trace_descriptor *descriptor,
  94                 struct bt_trace_handle *handle);
  95
  96 static
  97 int ctf_close_trace(struct trace_descriptor *descriptor);
  98 static
  99 uint64_t ctf_timestamp_begin(struct trace_descriptor *descriptor,
 100                 struct bt_trace_handle *handle, enum bt_clock_type type);
 101 static
 102 uint64_t ctf_timestamp_end(struct trace_descriptor *descriptor,
 103                 struct bt_trace_handle *handle, enum bt_clock_type type);
 104 static
 105 int ctf_convert_index_timestamp(struct trace_descriptor *tdp);
 106
 107 static
 108 rw_dispatch read_dispatch_table[] = {
 109         [ CTF_TYPE_INTEGER ] = ctf_integer_read,
 110         [ CTF_TYPE_FLOAT ] = ctf_float_read,
 111         [ CTF_TYPE_ENUM ] = ctf_enum_read,
 112         [ CTF_TYPE_STRING ] = ctf_string_read,
 113         [ CTF_TYPE_STRUCT ] = ctf_struct_rw,
 114         [ CTF_TYPE_VARIANT ] = ctf_variant_rw,
 115         [ CTF_TYPE_ARRAY ] = ctf_array_read,
 116         [ CTF_TYPE_SEQUENCE ] = ctf_sequence_read,
 117 };
 118
 119 static
 120 rw_dispatch write_dispatch_table[] = {
 121         [ CTF_TYPE_INTEGER ] = ctf_integer_write,
 122         [ CTF_TYPE_FLOAT ] = ctf_float_write,
 123         [ CTF_TYPE_ENUM ] = ctf_enum_write,
 124         [ CTF_TYPE_STRING ] = ctf_string_write,
 125         [ CTF_TYPE_STRUCT ] = ctf_struct_rw,
 126         [ CTF_TYPE_VARIANT ] = ctf_variant_rw,
 127         [ CTF_TYPE_ARRAY ] = ctf_array_write,
 128         [ CTF_TYPE_SEQUENCE ] = ctf_sequence_write,
 129 };
 130
 131 static
 132 struct format ctf_format = {
 133         .open_trace = ctf_open_trace,
 134         .open_mmap_trace = ctf_open_mmap_trace,
 135         .close_trace = ctf_close_trace,
 136         .set_context = ctf_set_context,
 137         .set_handle = ctf_set_handle,
 138         .timestamp_begin = ctf_timestamp_begin,
 139         .timestamp_end = ctf_timestamp_end,
 140         .convert_index_timestamp = ctf_convert_index_timestamp,
 141 };
 142
 143 static
 144 uint64_t ctf_timestamp_begin(struct trace_descriptor *descriptor,
 145                 struct bt_trace_handle *handle, enum bt_clock_type type)
 146 {
 147         struct ctf_trace *tin;
 148         uint64_t begin = ULLONG_MAX;
 149         int i, j;
 150
 151         tin = container_of(descriptor, struct ctf_trace, parent);
 152
 153         if (!tin)
 154                 goto error;
 155
 156         /* for each stream_class */
 157         for (i = 0; i < tin->streams->len; i++) {
 158                 struct ctf_stream_declaration *stream_class;
 159
 160                 stream_class = g_ptr_array_index(tin->streams, i);
 161                 if (!stream_class)
 162                         continue;
 163                 /* for each file_stream */
 164                 for (j = 0; j < stream_class->streams->len; j++) {
 165                         struct ctf_stream_definition *stream;
 166                         struct ctf_file_stream *cfs;
 167                         struct ctf_stream_pos *stream_pos;
 168                         struct packet_index *index;
 169
 170                         stream = g_ptr_array_index(stream_class->streams, j);
 171                         cfs = container_of(stream, struct ctf_file_stream,
 172                                         parent);
 173                         stream_pos = &cfs->pos;
 174
 175                         if (!stream_pos->packet_real_index)
 176                                 goto error;
 177
 178                         if (stream_pos->packet_real_index->len <= 0)
 179                                 continue;
 180
 181                         if (type == BT_CLOCK_REAL) {
 182                                 index = &g_array_index(stream_pos->packet_real_index,
 183                                                 struct packet_index,
 184                                                 stream_pos->packet_real_index->len - 1);
 185                         } else if (type == BT_CLOCK_CYCLES) {
 186                                 index = &g_array_index(stream_pos->packet_cycles_index,
 187                                                 struct packet_index,
 188                                                 stream_pos->packet_real_index->len - 1);
 189
 190                         } else {
 191                                 goto error;
 192                         }
 193                         if (index->timestamp_begin < begin)
 194                                 begin = index->timestamp_begin;
 195                 }
 196         }
 197
 198         return begin;
 199
 200 error:
 201         return -1ULL;
 202 }
 203
 204 static
 205 uint64_t ctf_timestamp_end(struct trace_descriptor *descriptor,
 206                 struct bt_trace_handle *handle, enum bt_clock_type type)
 207 {
 208         struct ctf_trace *tin;
 209         uint64_t end = 0;
 210         int i, j;
 211
 212         tin = container_of(descriptor, struct ctf_trace, parent);
 213
 214         if (!tin)
 215                 goto error;
 216
 217         /* for each stream_class */
 218         for (i = 0; i < tin->streams->len; i++) {
 219                 struct ctf_stream_declaration *stream_class;
 220
 221                 stream_class = g_ptr_array_index(tin->streams, i);
 222                 if (!stream_class)
 223                         continue;
 224                 /* for each file_stream */
 225                 for (j = 0; j < stream_class->streams->len; j++) {
 226                         struct ctf_stream_definition *stream;
 227                         struct ctf_file_stream *cfs;
 228                         struct ctf_stream_pos *stream_pos;
 229                         struct packet_index *index;
 230
 231                         stream = g_ptr_array_index(stream_class->streams, j);
 232                         cfs = container_of(stream, struct ctf_file_stream,
 233                                         parent);
 234                         stream_pos = &cfs->pos;
 235
 236                         if (!stream_pos->packet_real_index)
 237                                 goto error;
 238
 239                         if (stream_pos->packet_real_index->len <= 0)
 240                                 continue;
 241
 242                         if (type == BT_CLOCK_REAL) {
 243                                 index = &g_array_index(stream_pos->packet_real_index,
 244                                                 struct packet_index,
 245                                                 stream_pos->packet_real_index->len - 1);
 246                         } else if (type == BT_CLOCK_CYCLES) {
 247                                 index = &g_array_index(stream_pos->packet_cycles_index,
 248                                                 struct packet_index,
 249                                                 stream_pos->packet_real_index->len - 1);
 250
 251                         } else {
 252                                 goto error;
 253                         }
 254                         if (index->timestamp_end > end)
 255                                 end = index->timestamp_end;
 256                 }
 257         }
 258
 259         return end;
 260
 261 error:
 262         return -1ULL;
 263 }
 264
 265 /*
 266  * Update stream current timestamp
 267  */
 268 static
 269 void ctf_update_timestamp(struct ctf_stream_definition *stream,
 270                           struct definition_integer *integer_definition)
 271 {
 272         struct declaration_integer *integer_declaration =
 273                 integer_definition->declaration;
 274         uint64_t oldval, newval, updateval;
 275
 276         if (unlikely(integer_declaration->len == 64)) {
 277                 stream->prev_cycles_timestamp = stream->cycles_timestamp;
 278                 stream->cycles_timestamp = integer_definition->value._unsigned;
 279                 stream->prev_real_timestamp = ctf_get_real_timestamp(stream,
 280                                 stream->prev_cycles_timestamp);
 281                 stream->real_timestamp = ctf_get_real_timestamp(stream,
 282                                 stream->cycles_timestamp);
 283                 return;
 284         }
 285         /* keep low bits */
 286         oldval = stream->cycles_timestamp;
 287         oldval &= (1ULL << integer_declaration->len) - 1;
 288         newval = integer_definition->value._unsigned;
 289         /* Test for overflow by comparing low bits */
 290         if (newval < oldval)
 291                 newval += 1ULL << integer_declaration->len;
 292         /* updateval contains old high bits, and new low bits (sum) */
 293         updateval = stream->cycles_timestamp;
 294         updateval &= ~((1ULL << integer_declaration->len) - 1);
 295         updateval += newval;
 296         stream->prev_cycles_timestamp = stream->cycles_timestamp;
 297         stream->cycles_timestamp = updateval;
 298
 299         /* convert to real timestamp */
 300         stream->prev_real_timestamp = ctf_get_real_timestamp(stream,
 301                         stream->prev_cycles_timestamp);
 302         stream->real_timestamp = ctf_get_real_timestamp(stream,
 303                         stream->cycles_timestamp);
 304 }
 305
 306 /*
 307  * Print timestamp, rescaling clock frequency to nanoseconds and
 308  * applying offsets as needed (unix time).
 309  */
 310 static
 311 void ctf_print_timestamp_real(FILE *fp,
 312                         struct ctf_stream_definition *stream,
 313                         uint64_t timestamp)
 314 {
 315         uint64_t ts_sec = 0, ts_nsec;
 316
 317         ts_nsec = timestamp;
 318
 319         /* Add command-line offset */
 320         ts_sec += opt_clock_offset;
 321
 322         ts_sec += ts_nsec / NSEC_PER_SEC;
 323         ts_nsec = ts_nsec % NSEC_PER_SEC;
 324
 325         if (!opt_clock_seconds) {
 326                 struct tm tm;
 327                 time_t time_s = (time_t) ts_sec;
 328
 329                 if (!opt_clock_gmt) {
 330                         struct tm *res;
 331
 332                         res = localtime_r(&time_s, &tm);
 333                         if (!res) {
 334                                 fprintf(stderr, "[warning] Unable to get localtime.\n");
 335                                 goto seconds;
 336                         }
 337                 } else {
 338                         struct tm *res;
 339
 340                         res = gmtime_r(&time_s, &tm);
 341                         if (!res) {
 342                                 fprintf(stderr, "[warning] Unable to get gmtime.\n");
 343                                 goto seconds;
 344                         }
 345                 }
 346                 if (opt_clock_date) {
 347                         char timestr[26];
 348                         size_t res;
 349
 350                         /* Print date and time */
 351                         res = strftime(timestr, sizeof(timestr),
 352                                 "%F ", &tm);
 353                         if (!res) {
 354                                 fprintf(stderr, "[warning] Unable to print ascii time.\n");
 355                                 goto seconds;
 356                         }
 357                         fprintf(fp, "%s", timestr);
 358                 }
 359                 /* Print time in HH:MM:SS.ns */
 360                 fprintf(fp, "%02d:%02d:%02d.%09" PRIu64,
 361                         tm.tm_hour, tm.tm_min, tm.tm_sec, ts_nsec);
 362                 goto end;
 363         }
 364 seconds:
 365         fprintf(fp, "%3" PRIu64 ".%09" PRIu64,
 366                 ts_sec, ts_nsec);
 367
 368 end:
 369         return;
 370 }
 371
 372 /*
 373  * Print timestamp, in cycles
 374  */
 375 static
 376 void ctf_print_timestamp_cycles(FILE *fp,
 377                 struct ctf_stream_definition *stream,
 378                 uint64_t timestamp)
 379 {
 380         fprintf(fp, "%020" PRIu64, timestamp);
 381 }
 382
 383 void ctf_print_timestamp(FILE *fp,
 384                 struct ctf_stream_definition *stream,
 385                 uint64_t timestamp)
 386 {
 387         if (opt_clock_cycles) {
 388                 ctf_print_timestamp_cycles(fp, stream, timestamp);
 389         } else {
 390                 ctf_print_timestamp_real(fp, stream, timestamp);
 391         }
 392 }
 393
 394 static
 395 int ctf_read_event(struct stream_pos *ppos, struct ctf_stream_definition *stream)
 396 {
 397         struct ctf_stream_pos *pos =
 398                 container_of(ppos, struct ctf_stream_pos, parent);
 399         struct ctf_stream_declaration *stream_class = stream->stream_class;
 400         struct ctf_event_definition *event;
 401         uint64_t id = 0;
 402         int ret;
 403
 404         /* We need to check for EOF here for empty files. */
 405         if (unlikely(pos->offset == EOF))
 406                 return EOF;
 407
 408         ctf_pos_get_event(pos);
 409
 410         /* save the current position as a restore point */
 411         pos->last_offset = pos->offset;
 412
 413         /*
 414          * This is the EOF check after we've advanced the position in
 415          * ctf_pos_get_event.
 416          */
 417         if (unlikely(pos->offset == EOF))
 418                 return EOF;
 419         assert(pos->offset < pos->content_size);
 420
 421         /* Read event header */
 422         if (likely(stream->stream_event_header)) {
 423                 struct definition_integer *integer_definition;
 424                 struct definition *variant;
 425
 426                 ret = generic_rw(ppos, &stream->stream_event_header->p);
 427                 if (unlikely(ret))
 428                         goto error;
 429                 /* lookup event id */
 430                 integer_definition = lookup_integer(&stream->stream_event_header->p, "id", FALSE);
 431                 if (integer_definition) {
 432                         id = integer_definition->value._unsigned;
 433                 } else {
 434                         struct definition_enum *enum_definition;
 435
 436                         enum_definition = bt_lookup_enum(&stream->stream_event_header->p, "id", FALSE);
 437                         if (enum_definition) {
 438                                 id = enum_definition->integer->value._unsigned;
 439                         }
 440                 }
 441
 442                 variant = lookup_variant(&stream->stream_event_header->p, "v");
 443                 if (variant) {
 444                         integer_definition = lookup_integer(variant, "id", FALSE);
 445                         if (integer_definition) {
 446                                 id = integer_definition->value._unsigned;
 447                         }
 448                 }
 449                 stream->event_id = id;
 450
 451                 /* lookup timestamp */
 452                 stream->has_timestamp = 0;
 453                 integer_definition = lookup_integer(&stream->stream_event_header->p, "timestamp", FALSE);
 454                 if (integer_definition) {
 455                         ctf_update_timestamp(stream, integer_definition);
 456                         stream->has_timestamp = 1;
 457                 } else {
 458                         if (variant) {
 459                                 integer_definition = lookup_integer(variant, "timestamp", FALSE);
 460                                 if (integer_definition) {
 461                                         ctf_update_timestamp(stream, integer_definition);
 462                                         stream->has_timestamp = 1;
 463                                 }
 464                         }
 465                 }
 466         }
 467
 468         /* Read stream-declared event context */
 469         if (stream->stream_event_context) {
 470                 ret = generic_rw(ppos, &stream->stream_event_context->p);
 471                 if (ret)
 472                         goto error;
 473         }
 474
 475         if (unlikely(id >= stream_class->events_by_id->len)) {
 476                 fprintf(stderr, "[error] Event id %" PRIu64 " is outside range.\n", id);
 477                 return -EINVAL;
 478         }
 479         event = g_ptr_array_index(stream->events_by_id, id);
 480         if (unlikely(!event)) {
 481                 fprintf(stderr, "[error] Event id %" PRIu64 " is unknown.\n", id);
 482                 return -EINVAL;
 483         }
 484
 485         /* Read event-declared event context */
 486         if (event->event_context) {
 487                 ret = generic_rw(ppos, &event->event_context->p);
 488                 if (ret)
 489                         goto error;
 490         }
 491
 492         /* Read event payload */
 493         if (likely(event->event_fields)) {
 494                 ret = generic_rw(ppos, &event->event_fields->p);
 495                 if (ret)
 496                         goto error;
 497         }
 498
 499         return 0;
 500
 501 error:
 502         fprintf(stderr, "[error] Unexpected end of stream. Either the trace data stream is corrupted or metadata description does not match data layout.\n");
 503         return ret;
 504 }
 505
 506 static
 507 int ctf_write_event(struct stream_pos *pos, struct ctf_stream_definition *stream)
 508 {
 509         struct ctf_stream_declaration *stream_class = stream->stream_class;
 510         struct ctf_event_definition *event;
 511         uint64_t id;
 512         int ret;
 513
 514         id = stream->event_id;
 515
 516         /* print event header */
 517         if (likely(stream->stream_event_header)) {
 518                 ret = generic_rw(pos, &stream->stream_event_header->p);
 519                 if (ret)
 520                         goto error;
 521         }
 522
 523         /* print stream-declared event context */
 524         if (stream->stream_event_context) {
 525                 ret = generic_rw(pos, &stream->stream_event_context->p);
 526                 if (ret)
 527                         goto error;
 528         }
 529
 530         if (unlikely(id >= stream_class->events_by_id->len)) {
 531                 fprintf(stderr, "[error] Event id %" PRIu64 " is outside range.\n", id);
 532                 return -EINVAL;
 533         }
 534         event = g_ptr_array_index(stream->events_by_id, id);
 535         if (unlikely(!event)) {
 536                 fprintf(stderr, "[error] Event id %" PRIu64 " is unknown.\n", id);
 537                 return -EINVAL;
 538         }
 539
 540         /* print event-declared event context */
 541         if (event->event_context) {
 542                 ret = generic_rw(pos, &event->event_context->p);
 543                 if (ret)
 544                         goto error;
 545         }
 546
 547         /* Read and print event payload */
 548         if (likely(event->event_fields)) {
 549                 ret = generic_rw(pos, &event->event_fields->p);
 550                 if (ret)
 551                         goto error;
 552         }
 553
 554         return 0;
 555
 556 error:
 557         fprintf(stderr, "[error] Unexpected end of stream. Either the trace data stream is corrupted or metadata description does not match data layout.\n");
 558         return ret;
 559 }
 560
 561 int ctf_init_pos(struct ctf_stream_pos *pos, int fd, int open_flags)
 562 {
 563         pos->fd = fd;
 564         if (fd >= 0) {
 565                 pos->packet_cycles_index = g_array_new(FALSE, TRUE,
 566                                                 sizeof(struct packet_index));
 567                 pos->packet_real_index = g_array_new(FALSE, TRUE,
 568                                 sizeof(struct packet_index));
 569         } else {
 570                 pos->packet_cycles_index = NULL;
 571                 pos->packet_real_index = NULL;
 572         }
 573         switch (open_flags & O_ACCMODE) {
 574         case O_RDONLY:
 575                 pos->prot = PROT_READ;
 576                 pos->flags = MAP_PRIVATE;
 577                 pos->parent.rw_table = read_dispatch_table;
 578                 pos->parent.event_cb = ctf_read_event;
 579                 break;
 580         case O_RDWR:
 581                 pos->prot = PROT_WRITE; /* Write has priority */
 582                 pos->flags = MAP_SHARED;
 583                 pos->parent.rw_table = write_dispatch_table;
 584                 pos->parent.event_cb = ctf_write_event;
 585                 if (fd >= 0)
 586                         ctf_packet_seek(&pos->parent, 0, SEEK_SET);     /* position for write */
 587                 break;
 588         default:
 589                 assert(0);
 590         }
 591         return 0;
 592 }
 593
 594 int ctf_fini_pos(struct ctf_stream_pos *pos)
 595 {
 596         if (pos->prot == PROT_WRITE && pos->content_size_loc)
 597                 *pos->content_size_loc = pos->offset;
 598         if (pos->base_mma) {
 599                 int ret;
 600
 601                 /* unmap old base */
 602                 ret = munmap_align(pos->base_mma);
 603                 if (ret) {
 604                         fprintf(stderr, "[error] Unable to unmap old base: %s.\n",
 605                                 strerror(errno));
 606                         return -1;
 607                 }
 608         }
 609         if (pos->packet_cycles_index)
 610                 (void) g_array_free(pos->packet_cycles_index, TRUE);
 611         if (pos->packet_real_index)
 612                 (void) g_array_free(pos->packet_real_index, TRUE);
 613         return 0;
 614 }
 615
 616 /*
 617  * for SEEK_CUR: go to next packet.
 618  * for SEEK_POS: go to packet numer (index).
 619  */
 620 void ctf_packet_seek(struct stream_pos *stream_pos, size_t index, int whence)
 621 {
 622         struct ctf_stream_pos *pos =
 623                 container_of(stream_pos, struct ctf_stream_pos, parent);
 624         struct ctf_file_stream *file_stream =
 625                 container_of(pos, struct ctf_file_stream, pos);
 626         int ret;
 627         off_t off;
 628         struct packet_index *packet_index;
 629
 630         if (pos->prot == PROT_WRITE && pos->content_size_loc)
 631                 *pos->content_size_loc = pos->offset;
 632
 633         if (pos->base_mma) {
 634                 /* unmap old base */
 635                 ret = munmap_align(pos->base_mma);
 636                 if (ret) {
 637                         fprintf(stderr, "[error] Unable to unmap old base: %s.\n",
 638                                 strerror(errno));
 639                         assert(0);
 640                 }
 641                 pos->base_mma = NULL;
 642         }
 643
 644         /*
 645          * The caller should never ask for ctf_move_pos across packets,
 646          * except to get exactly at the beginning of the next packet.
 647          */
 648         if (pos->prot == PROT_WRITE) {
 649                 switch (whence) {
 650                 case SEEK_CUR:
 651                         /* The writer will add padding */
 652                         pos->mmap_offset += WRITE_PACKET_LEN / CHAR_BIT;
 653                         break;
 654                 case SEEK_SET:
 655                         assert(index == 0);     /* only seek supported for now */
 656                         pos->cur_index = 0;
 657                         break;
 658                 default:
 659                         assert(0);
 660                 }
 661                 pos->content_size = -1U;        /* Unknown at this point */
 662                 pos->packet_size = WRITE_PACKET_LEN;
 663                 off = posix_fallocate(pos->fd, pos->mmap_offset,
 664                                       pos->packet_size / CHAR_BIT);
 665                 assert(off >= 0);
 666                 pos->offset = 0;
 667         } else {
 668         read_next_packet:
 669                 switch (whence) {
 670                 case SEEK_CUR:
 671                 {
 672                         uint64_t events_discarded_diff;
 673
 674                         if (pos->offset == EOF) {
 675                                 return;
 676                         }
 677                         /* For printing discarded event count */
 678                         packet_index = &g_array_index(pos->packet_cycles_index,
 679                                         struct packet_index, pos->cur_index);
 680                         file_stream->parent.prev_cycles_timestamp_end =
 681                                 packet_index->timestamp_end;
 682                         file_stream->parent.prev_cycles_timestamp =
 683                                 packet_index->timestamp_begin;
 684
 685                         packet_index = &g_array_index(pos->packet_real_index,
 686                                         struct packet_index, pos->cur_index);
 687                         file_stream->parent.prev_real_timestamp_end =
 688                                                 packet_index->timestamp_end;
 689                         file_stream->parent.prev_real_timestamp =
 690                                 packet_index->timestamp_begin;
 691
 692                         events_discarded_diff = packet_index->events_discarded;
 693                         if (pos->cur_index > 0) {
 694                                 packet_index = &g_array_index(pos->packet_real_index,
 695                                                 struct packet_index,
 696                                                 pos->cur_index - 1);
 697                                 events_discarded_diff -= packet_index->events_discarded;
 698                                 /*
 699                                  * Deal with 32-bit wrap-around if the
 700                                  * tracer provided a 32-bit field.
 701                                  */
 702                                 if (packet_index->events_discarded_len == 32) {
 703                                         events_discarded_diff = (uint32_t) events_discarded_diff;
 704                                 }
 705                         }
 706                         file_stream->parent.events_discarded = events_discarded_diff;
 707                         file_stream->parent.prev_real_timestamp = file_stream->parent.real_timestamp;
 708                         file_stream->parent.prev_cycles_timestamp = file_stream->parent.cycles_timestamp;
 709                         /* The reader will expect us to skip padding */
 710                         ++pos->cur_index;
 711                         break;
 712                 }
 713                 case SEEK_SET:
 714                         packet_index = &g_array_index(pos->packet_cycles_index,
 715                                         struct packet_index, index);
 716                         pos->last_events_discarded = packet_index->events_discarded;
 717                         pos->cur_index = index;
 718                         file_stream->parent.prev_real_timestamp = 0;
 719                         file_stream->parent.prev_real_timestamp_end = 0;
 720                         file_stream->parent.prev_cycles_timestamp = 0;
 721                         file_stream->parent.prev_cycles_timestamp_end = 0;
 722                         break;
 723                 default:
 724                         assert(0);
 725                 }
 726                 if (pos->cur_index >= pos->packet_real_index->len) {
 727                         /*
 728                          * When a stream reaches the end of the
 729                          * file, we need to show the number of
 730                          * events discarded ourselves, because
 731                          * there is no next event scheduled to
 732                          * be printed in the output.
 733                          */
 734                         if (file_stream->parent.events_discarded) {
 735                                 /*
 736                                  * We need to check if we are in trace
 737                                  * read or called from packet indexing.
 738                                  * In this last case, the collection is
 739                                  * not there, so we cannot print the
 740                                  * timestamps.
 741                                  */
 742                                 if ((&file_stream->parent)->stream_class->trace->collection) {
 743                                         fflush(stdout);
 744                                         fprintf(stderr, "[warning] Tracer discarded %" PRIu64 " events at end of stream between [",
 745                                                         file_stream->parent.events_discarded);
 746                                         if (opt_clock_cycles) {
 747                                                 ctf_print_timestamp(stderr,
 748                                                                 &file_stream->parent,
 749                                                                 file_stream->parent.prev_cycles_timestamp);
 750                                                 fprintf(stderr, "] and [");
 751                                                 ctf_print_timestamp(stderr, &file_stream->parent,
 752                                                                 file_stream->parent.prev_cycles_timestamp_end);
 753                                         } else {
 754                                                 ctf_print_timestamp(stderr,
 755                                                                 &file_stream->parent,
 756                                                                 file_stream->parent.prev_real_timestamp);
 757                                                 fprintf(stderr, "] and [");
 758                                                 ctf_print_timestamp(stderr, &file_stream->parent,
 759                                                                 file_stream->parent.prev_real_timestamp_end);
 760                                         }
 761                                         fprintf(stderr, "]. You should consider recording a new trace with larger buffers or with fewer events enabled.\n");
 762                                         fflush(stderr);
 763                                 }
 764                                 file_stream->parent.events_discarded = 0;
 765                         }
 766                         pos->offset = EOF;
 767                         return;
 768                 }
 769                 packet_index = &g_array_index(pos->packet_cycles_index,
 770                                 struct packet_index,
 771                                 pos->cur_index);
 772                 file_stream->parent.cycles_timestamp = packet_index->timestamp_begin;
 773
 774                 packet_index = &g_array_index(pos->packet_real_index,
 775                                 struct packet_index,
 776                                 pos->cur_index);
 777                 file_stream->parent.real_timestamp = packet_index->timestamp_begin;
 778                 pos->mmap_offset = packet_index->offset;
 779
 780                 /* Lookup context/packet size in index */
 781                 pos->content_size = packet_index->content_size;
 782                 pos->packet_size = packet_index->packet_size;
 783                 if (packet_index->data_offset < packet_index->content_size) {
 784                         pos->offset = 0;        /* will read headers */
 785                 } else if (packet_index->data_offset == packet_index->content_size) {
 786                         /* empty packet */
 787                         pos->offset = packet_index->data_offset;
 788                         whence = SEEK_CUR;
 789                         goto read_next_packet;
 790                 } else {
 791                         pos->offset = EOF;
 792                         return;
 793                 }
 794         }
 795         /* map new base. Need mapping length from header. */
 796         pos->base_mma = mmap_align(pos->packet_size / CHAR_BIT, pos->prot,
 797                         pos->flags, pos->fd, pos->mmap_offset);
 798         if (pos->base_mma == MAP_FAILED) {
 799                 fprintf(stderr, "[error] mmap error %s.\n",
 800                         strerror(errno));
 801                 assert(0);
 802         }
 803
 804         /* update trace_packet_header and stream_packet_context */
 805         if (pos->prot != PROT_WRITE && file_stream->parent.trace_packet_header) {
 806                 /* Read packet header */
 807                 ret = generic_rw(&pos->parent, &file_stream->parent.trace_packet_header->p);
 808                 assert(!ret);
 809         }
 810         if (pos->prot != PROT_WRITE && file_stream->parent.stream_packet_context) {
 811                 /* Read packet context */
 812                 ret = generic_rw(&pos->parent, &file_stream->parent.stream_packet_context->p);
 813                 assert(!ret);
 814         }
 815 }
 816
 817 static
 818 int packet_metadata(struct ctf_trace *td, FILE *fp)
 819 {
 820         uint32_t magic;
 821         size_t len;
 822         int ret = 0;
 823
 824         len = fread(&magic, sizeof(magic), 1, fp);
 825         if (len != 1) {
 826                 goto end;
 827         }
 828         if (magic == TSDL_MAGIC) {
 829                 ret = 1;
 830                 td->byte_order = BYTE_ORDER;
 831                 CTF_TRACE_SET_FIELD(td, byte_order);
 832         } else if (magic == GUINT32_SWAP_LE_BE(TSDL_MAGIC)) {
 833                 ret = 1;
 834                 td->byte_order = (BYTE_ORDER == BIG_ENDIAN) ?
 835                                         LITTLE_ENDIAN : BIG_ENDIAN;
 836                 CTF_TRACE_SET_FIELD(td, byte_order);
 837         }
 838 end:
 839         rewind(fp);
 840         return ret;
 841 }
 842
 843 /*
 844  * Returns 0 on success, -1 on error.
 845  */
 846 static
 847 int check_version(unsigned int major, unsigned int minor)
 848 {
 849         switch (major) {
 850         case 1:
 851                 switch (minor) {
 852                 case 8:
 853                         return 0;
 854                 default:
 855                         goto warning;
 856                 }
 857         default:
 858                 goto warning;
 859
 860         }
 861
 862         /* eventually return an error instead of warning */
 863 warning:
 864         fprintf(stderr, "[warning] Unsupported CTF specification version %u.%u. Trying anyway.\n",
 865                 major, minor);
 866         return 0;
 867 }
 868
 869 static
 870 int ctf_open_trace_metadata_packet_read(struct ctf_trace *td, FILE *in,
 871                                         FILE *out)
 872 {
 873         struct metadata_packet_header header;
 874         size_t readlen, writelen, toread;
 875         char buf[4096 + 1];     /* + 1 for debug-mode \0 */
 876         int ret = 0;
 877
 878         readlen = fread(&header, header_sizeof(header), 1, in);
 879         if (readlen < 1)
 880                 return -EINVAL;
 881
 882         if (td->byte_order != BYTE_ORDER) {
 883                 header.magic = GUINT32_SWAP_LE_BE(header.magic);
 884                 header.checksum = GUINT32_SWAP_LE_BE(header.checksum);
 885                 header.content_size = GUINT32_SWAP_LE_BE(header.content_size);
 886                 header.packet_size = GUINT32_SWAP_LE_BE(header.packet_size);
 887         }
 888         if (header.checksum)
 889                 fprintf(stderr, "[warning] checksum verification not supported yet.\n");
 890         if (header.compression_scheme) {
 891                 fprintf(stderr, "[error] compression (%u) not supported yet.\n",
 892                         header.compression_scheme);
 893                 return -EINVAL;
 894         }
 895         if (header.encryption_scheme) {
 896                 fprintf(stderr, "[error] encryption (%u) not supported yet.\n",
 897                         header.encryption_scheme);
 898                 return -EINVAL;
 899         }
 900         if (header.checksum_scheme) {
 901                 fprintf(stderr, "[error] checksum (%u) not supported yet.\n",
 902                         header.checksum_scheme);
 903                 return -EINVAL;
 904         }
 905         if (check_version(header.major, header.minor) < 0)
 906                 return -EINVAL;
 907         if (!CTF_TRACE_FIELD_IS_SET(td, uuid)) {
 908                 memcpy(td->uuid, header.uuid, sizeof(header.uuid));
 909                 CTF_TRACE_SET_FIELD(td, uuid);
 910         } else {
 911                 if (babeltrace_uuid_compare(header.uuid, td->uuid))
 912                         return -EINVAL;
 913         }
 914
 915         if ((header.content_size / CHAR_BIT) < header_sizeof(header))
 916                 return -EINVAL;
 917
 918         toread = (header.content_size / CHAR_BIT) - header_sizeof(header);
 919
 920         for (;;) {
 921                 readlen = fread(buf, sizeof(char), min(sizeof(buf) - 1, toread), in);
 922                 if (ferror(in)) {
 923                         ret = -EINVAL;
 924                         break;
 925                 }
 926                 if (babeltrace_debug) {
 927                         buf[readlen] = '\0';
 928                         fprintf(stderr, "[debug] metadata packet read: %s\n",
 929                                 buf);
 930                 }
 931
 932                 writelen = fwrite(buf, sizeof(char), readlen, out);
 933                 if (writelen < readlen) {
 934                         ret = -EIO;
 935                         break;
 936                 }
 937                 if (ferror(out)) {
 938                         ret = -EINVAL;
 939                         break;
 940                 }
 941                 toread -= readlen;
 942                 if (!toread) {
 943                         ret = 0;        /* continue reading next packet */
 944                         goto read_padding;
 945                 }
 946         }
 947         return ret;
 948
 949 read_padding:
 950         toread = (header.packet_size - header.content_size) / CHAR_BIT;
 951         ret = fseek(in, toread, SEEK_CUR);
 952         if (ret < 0) {
 953                 fprintf(stderr, "[warning] Missing padding at end of file\n");
 954                 ret = 0;
 955         }
 956         return ret;
 957 }
 958
 959 static
 960 int ctf_open_trace_metadata_stream_read(struct ctf_trace *td, FILE **fp,
 961                                         char **buf)
 962 {
 963         FILE *in, *out;
 964         size_t size;
 965         int ret;
 966
 967         in = *fp;
 968         /*
 969          * Using strlen on *buf instead of size of open_memstream
 970          * because its size includes garbage at the end (after final
 971          * \0). This is the allocated size, not the actual string size.
 972          */
 973         out = babeltrace_open_memstream(buf, &size);
 974         if (out == NULL) {
 975                 perror("Metadata open_memstream");
 976                 return -errno;
 977         }
 978         for (;;) {
 979                 ret = ctf_open_trace_metadata_packet_read(td, in, out);
 980                 if (ret) {
 981                         break;
 982                 }
 983                 if (feof(in)) {
 984                         ret = 0;
 985                         break;
 986                 }
 987         }
 988         /* close to flush the buffer */
 989         ret = babeltrace_close_memstream(buf, &size, out);
 990         if (ret < 0) {
 991                 int closeret;
 992
 993                 perror("babeltrace_flush_memstream");
 994                 ret = -errno;
 995                 closeret = fclose(in);
 996                 if (closeret) {
 997                         perror("Error in fclose");
 998                 }
 999                 return ret;
1000         }
1001         ret = fclose(in);
1002         if (ret) {
1003                 perror("Error in fclose");
1004         }
1005         /* open for reading */
1006         *fp = babeltrace_fmemopen(*buf, strlen(*buf), "rb");
1007         if (!*fp) {
1008                 perror("Metadata fmemopen");
1009                 return -errno;
1010         }
1011         return 0;
1012 }
1013
1014 static
1015 int ctf_open_trace_metadata_read(struct ctf_trace *td,
1016                 void (*packet_seek)(struct stream_pos *pos, size_t index,
1017                         int whence), FILE *metadata_fp)
1018 {
1019         struct ctf_scanner *scanner;
1020         struct ctf_file_stream *metadata_stream;
1021         FILE *fp;
1022         char *buf = NULL;
1023         int ret = 0, closeret;
1024
1025         metadata_stream = g_new0(struct ctf_file_stream, 1);
1026         metadata_stream->pos.last_offset = LAST_OFFSET_POISON;
1027
1028         if (packet_seek) {
1029                 metadata_stream->pos.packet_seek = packet_seek;
1030         } else {
1031                 fprintf(stderr, "[error] packet_seek function undefined.\n");
1032                 ret = -1;
1033                 goto end_free;
1034         }
1035
1036         if (metadata_fp) {
1037                 fp = metadata_fp;
1038                 metadata_stream->pos.fd = -1;
1039         } else {
1040                 td->metadata = &metadata_stream->parent;
1041                 metadata_stream->pos.fd = openat(td->dirfd, "metadata", O_RDONLY);
1042                 if (metadata_stream->pos.fd < 0) {
1043                         fprintf(stderr, "Unable to open metadata.\n");
1044                         ret = -1;
1045                         goto end_free;
1046                 }
1047
1048                 fp = fdopen(metadata_stream->pos.fd, "r");
1049                 if (!fp) {
1050                         fprintf(stderr, "[error] Unable to open metadata stream.\n");
1051                         perror("Metadata stream open");
1052                         ret = -errno;
1053                         goto end_stream;
1054                 }
1055                 /* fd now belongs to fp */
1056                 metadata_stream->pos.fd = -1;
1057         }
1058         if (babeltrace_debug)
1059                 yydebug = 1;
1060
1061         if (packet_metadata(td, fp)) {
1062                 ret = ctf_open_trace_metadata_stream_read(td, &fp, &buf);
1063                 if (ret)
1064                         goto end_packet_read;
1065         } else {
1066                 unsigned int major, minor;
1067                 ssize_t nr_items;
1068
1069                 td->byte_order = BYTE_ORDER;
1070
1071                 /* Check text-only metadata header and version */
1072                 nr_items = fscanf(fp, "/* CTF %u.%u", &major, &minor);
1073                 if (nr_items < 2)
1074                         fprintf(stderr, "[warning] Ill-shapen or missing \"/* CTF x.y\" header for text-only metadata.\n");
1075                 if (check_version(major, minor) < 0) {
1076                         ret = -EINVAL;
1077                         goto end_packet_read;
1078                 }
1079                 rewind(fp);
1080         }
1081
1082         scanner = ctf_scanner_alloc(fp);
1083         if (!scanner) {
1084                 fprintf(stderr, "[error] Error allocating scanner\n");
1085                 ret = -ENOMEM;
1086                 goto end_scanner_alloc;
1087         }
1088         ret = ctf_scanner_append_ast(scanner);
1089         if (ret) {
1090                 fprintf(stderr, "[error] Error creating AST\n");
1091                 goto end;
1092         }
1093
1094         if (babeltrace_debug) {
1095                 ret = ctf_visitor_print_xml(stderr, 0, &scanner->ast->root);
1096                 if (ret) {
1097                         fprintf(stderr, "[error] Error visiting AST for XML output\n");
1098                         goto end;
1099                 }
1100         }
1101
1102         ret = ctf_visitor_semantic_check(stderr, 0, &scanner->ast->root);
1103         if (ret) {
1104                 fprintf(stderr, "[error] Error in CTF semantic validation %d\n", ret);
1105                 goto end;
1106         }
1107         ret = ctf_visitor_construct_metadata(stderr, 0, &scanner->ast->root,
1108                         td, td->byte_order);
1109         if (ret) {
1110                 fprintf(stderr, "[error] Error in CTF metadata constructor %d\n", ret);
1111                 goto end;
1112         }
1113 end:
1114         ctf_scanner_free(scanner);
1115 end_scanner_alloc:
1116 end_packet_read:
1117         if (fp) {
1118                 closeret = fclose(fp);
1119                 if (closeret) {
1120                         perror("Error on fclose");
1121                 }
1122         }
1123         free(buf);
1124 end_stream:
1125         if (metadata_stream->pos.fd >= 0) {
1126                 closeret = close(metadata_stream->pos.fd);
1127                 if (closeret) {
1128                         perror("Error on metadata stream fd close");
1129                 }
1130         }
1131 end_free:
1132         if (ret)
1133                 g_free(metadata_stream);
1134         return ret;
1135 }
1136
1137 static
1138 struct ctf_event_definition *create_event_definitions(struct ctf_trace *td,
1139                                                   struct ctf_stream_definition *stream,
1140                                                   struct ctf_event_declaration *event)
1141 {
1142         struct ctf_event_definition *stream_event = g_new0(struct ctf_event_definition, 1);
1143
1144         if (event->context_decl) {
1145                 struct definition *definition =
1146                         event->context_decl->p.definition_new(&event->context_decl->p,
1147                                 stream->parent_def_scope, 0, 0, "event.context");
1148                 if (!definition) {
1149                         goto error;
1150                 }
1151                 stream_event->event_context = container_of(definition,
1152                                         struct definition_struct, p);
1153                 stream->parent_def_scope = stream_event->event_context->p.scope;
1154         }
1155         if (event->fields_decl) {
1156                 struct definition *definition =
1157                         event->fields_decl->p.definition_new(&event->fields_decl->p,
1158                                 stream->parent_def_scope, 0, 0, "event.fields");
1159                 if (!definition) {
1160                         goto error;
1161                 }
1162                 stream_event->event_fields = container_of(definition,
1163                                         struct definition_struct, p);
1164                 stream->parent_def_scope = stream_event->event_fields->p.scope;
1165         }
1166         stream_event->stream = stream;
1167         return stream_event;
1168
1169 error:
1170         if (stream_event->event_fields)
1171                 bt_definition_unref(&stream_event->event_fields->p);
1172         if (stream_event->event_context)
1173                 bt_definition_unref(&stream_event->event_context->p);
1174         return NULL;
1175 }
1176
1177 static
1178 int create_stream_definitions(struct ctf_trace *td, struct ctf_stream_definition *stream)
1179 {
1180         struct ctf_stream_declaration *stream_class;
1181         int ret;
1182         int i;
1183
1184         if (stream->stream_definitions_created)
1185                 return 0;
1186
1187         stream_class = stream->stream_class;
1188
1189         if (stream_class->packet_context_decl) {
1190                 struct definition *definition =
1191                         stream_class->packet_context_decl->p.definition_new(&stream_class->packet_context_decl->p,
1192                                 stream->parent_def_scope, 0, 0, "stream.packet.context");
1193                 if (!definition) {
1194                         ret = -EINVAL;
1195                         goto error;
1196                 }
1197                 stream->stream_packet_context = container_of(definition,
1198                                                 struct definition_struct, p);
1199                 stream->parent_def_scope = stream->stream_packet_context->p.scope;
1200         }
1201         if (stream_class->event_header_decl) {
1202                 struct definition *definition =
1203                         stream_class->event_header_decl->p.definition_new(&stream_class->event_header_decl->p,
1204                                 stream->parent_def_scope, 0, 0, "stream.event.header");
1205                 if (!definition) {
1206                         ret = -EINVAL;
1207                         goto error;
1208                 }
1209                 stream->stream_event_header =
1210                         container_of(definition, struct definition_struct, p);
1211                 stream->parent_def_scope = stream->stream_event_header->p.scope;
1212         }
1213         if (stream_class->event_context_decl) {
1214                 struct definition *definition =
1215                         stream_class->event_context_decl->p.definition_new(&stream_class->event_context_decl->p,
1216                                 stream->parent_def_scope, 0, 0, "stream.event.context");
1217                 if (!definition) {
1218                         ret = -EINVAL;
1219                         goto error;
1220                 }
1221                 stream->stream_event_context =
1222                         container_of(definition, struct definition_struct, p);
1223                 stream->parent_def_scope = stream->stream_event_context->p.scope;
1224         }
1225         stream->events_by_id = g_ptr_array_new();
1226         g_ptr_array_set_size(stream->events_by_id, stream_class->events_by_id->len);
1227         for (i = 0; i < stream->events_by_id->len; i++) {
1228                 struct ctf_event_declaration *event = g_ptr_array_index(stream_class->events_by_id, i);
1229                 struct ctf_event_definition *stream_event;
1230
1231                 if (!event)
1232                         continue;
1233                 stream_event = create_event_definitions(td, stream, event);
1234                 if (!stream_event)
1235                         goto error_event;
1236                 g_ptr_array_index(stream->events_by_id, i) = stream_event;
1237         }
1238         return 0;
1239
1240 error_event:
1241         for (i = 0; i < stream->events_by_id->len; i++) {
1242                 struct ctf_event_definition *stream_event = g_ptr_array_index(stream->events_by_id, i);
1243                 if (stream_event)
1244                         g_free(stream_event);
1245         }
1246         g_ptr_array_free(stream->events_by_id, TRUE);
1247 error:
1248         if (stream->stream_event_context)
1249                 bt_definition_unref(&stream->stream_event_context->p);
1250         if (stream->stream_event_header)
1251                 bt_definition_unref(&stream->stream_event_header->p);
1252         if (stream->stream_packet_context)
1253                 bt_definition_unref(&stream->stream_packet_context->p);
1254         return ret;
1255 }
1256
1257
1258 static
1259 int create_stream_packet_index(struct ctf_trace *td,
1260                                struct ctf_file_stream *file_stream)
1261 {
1262         struct ctf_stream_declaration *stream;
1263         int len_index;
1264         struct ctf_stream_pos *pos;
1265         struct stat filestats;
1266         struct packet_index packet_index;
1267         int first_packet = 1;
1268         int ret;
1269
1270         pos = &file_stream->pos;
1271
1272         ret = fstat(pos->fd, &filestats);
1273         if (ret < 0)
1274                 return ret;
1275
1276         if (filestats.st_size < MAX_PACKET_HEADER_LEN / CHAR_BIT)
1277                 return -EINVAL;
1278
1279         for (pos->mmap_offset = 0; pos->mmap_offset < filestats.st_size; ) {
1280                 uint64_t stream_id = 0;
1281
1282                 if (pos->base_mma) {
1283                         /* unmap old base */
1284                         ret = munmap_align(pos->base_mma);
1285                         if (ret) {
1286                                 fprintf(stderr, "[error] Unable to unmap old base: %s.\n",
1287                                         strerror(errno));
1288                                 return ret;
1289                         }
1290                         pos->base_mma = NULL;
1291                 }
1292                 /* map new base. Need mapping length from header. */
1293                 pos->base_mma = mmap_align(MAX_PACKET_HEADER_LEN / CHAR_BIT, PROT_READ,
1294                                  MAP_PRIVATE, pos->fd, pos->mmap_offset);
1295                 assert(pos->base_mma != MAP_FAILED);
1296                 pos->content_size = MAX_PACKET_HEADER_LEN;      /* Unknown at this point */
1297                 pos->packet_size = MAX_PACKET_HEADER_LEN;       /* Unknown at this point */
1298                 pos->offset = 0;        /* Position of the packet header */
1299
1300                 packet_index.offset = pos->mmap_offset;
1301                 packet_index.content_size = 0;
1302                 packet_index.packet_size = 0;
1303                 packet_index.timestamp_begin = 0;
1304                 packet_index.timestamp_end = 0;
1305                 packet_index.events_discarded = 0;
1306                 packet_index.events_discarded_len = 0;
1307
1308                 /* read and check header, set stream id (and check) */
1309                 if (file_stream->parent.trace_packet_header) {
1310                         /* Read packet header */
1311                         ret = generic_rw(&pos->parent, &file_stream->parent.trace_packet_header->p);
1312                         if (ret)
1313                                 return ret;
1314                         len_index = struct_declaration_lookup_field_index(file_stream->parent.trace_packet_header->declaration, g_quark_from_static_string("magic"));
1315                         if (len_index >= 0) {
1316                                 struct definition *field;
1317                                 uint64_t magic;
1318
1319                                 field = struct_definition_get_field_from_index(file_stream->parent.trace_packet_header, len_index);
1320                                 magic = bt_get_unsigned_int(field);
1321                                 if (magic != CTF_MAGIC) {
1322                                         fprintf(stderr, "[error] Invalid magic number 0x%" PRIX64 " at packet %u (file offset %zd).\n",
1323                                                         magic,
1324                                                         file_stream->pos.packet_cycles_index->len,
1325                                                         (ssize_t) pos->mmap_offset);
1326                                         return -EINVAL;
1327                                 }
1328                         }
1329
1330                         /* check uuid */
1331                         len_index = struct_declaration_lookup_field_index(file_stream->parent.trace_packet_header->declaration, g_quark_from_static_string("uuid"));
1332                         if (len_index >= 0) {
1333                                 struct definition_array *defarray;
1334                                 struct definition *field;
1335                                 uint64_t i;
1336                                 uint8_t uuidval[BABELTRACE_UUID_LEN];
1337
1338                                 field = struct_definition_get_field_from_index(file_stream->parent.trace_packet_header, len_index);
1339                                 assert(field->declaration->id == CTF_TYPE_ARRAY);
1340                                 defarray = container_of(field, struct definition_array, p);
1341                                 assert(bt_array_len(defarray) == BABELTRACE_UUID_LEN);
1342
1343                                 for (i = 0; i < BABELTRACE_UUID_LEN; i++) {
1344                                         struct definition *elem;
1345
1346                                         elem = bt_array_index(defarray, i);
1347                                         uuidval[i] = bt_get_unsigned_int(elem);
1348                                 }
1349                                 ret = babeltrace_uuid_compare(td->uuid, uuidval);
1350                                 if (ret) {
1351                                         fprintf(stderr, "[error] Unique Universal Identifiers do not match.\n");
1352                                         return -EINVAL;
1353                                 }
1354                         }
1355
1356
1357                         len_index = struct_declaration_lookup_field_index(file_stream->parent.trace_packet_header->declaration, g_quark_from_static_string("stream_id"));
1358                         if (len_index >= 0) {
1359                                 struct definition *field;
1360
1361                                 field = struct_definition_get_field_from_index(file_stream->parent.trace_packet_header, len_index);
1362                                 stream_id = bt_get_unsigned_int(field);
1363                         }
1364                 }
1365
1366                 if (!first_packet && file_stream->parent.stream_id != stream_id) {
1367                         fprintf(stderr, "[error] Stream ID is changing within a stream.\n");
1368                         return -EINVAL;
1369                 }
1370                 if (first_packet) {
1371                         file_stream->parent.stream_id = stream_id;
1372                         if (stream_id >= td->streams->len) {
1373                                 fprintf(stderr, "[error] Stream %" PRIu64 " is not declared in metadata.\n", stream_id);
1374                                 return -EINVAL;
1375                         }
1376                         stream = g_ptr_array_index(td->streams, stream_id);
1377                         if (!stream) {
1378                                 fprintf(stderr, "[error] Stream %" PRIu64 " is not declared in metadata.\n", stream_id);
1379                                 return -EINVAL;
1380                         }
1381                         file_stream->parent.stream_class = stream;
1382                         ret = create_stream_definitions(td, &file_stream->parent);
1383                         if (ret)
1384                                 return ret;
1385                 }
1386                 first_packet = 0;
1387
1388                 if (file_stream->parent.stream_packet_context) {
1389                         /* Read packet context */
1390                         ret = generic_rw(&pos->parent, &file_stream->parent.stream_packet_context->p);
1391                         if (ret)
1392                                 return ret;
1393                         /* read content size from header */
1394                         len_index = struct_declaration_lookup_field_index(file_stream->parent.stream_packet_context->declaration, g_quark_from_static_string("content_size"));
1395                         if (len_index >= 0) {
1396                                 struct definition *field;
1397
1398                                 field = struct_definition_get_field_from_index(file_stream->parent.stream_packet_context, len_index);
1399                                 packet_index.content_size = bt_get_unsigned_int(field);
1400                         } else {
1401                                 /* Use file size for packet size */
1402                                 packet_index.content_size = filestats.st_size * CHAR_BIT;
1403                         }
1404
1405                         /* read packet size from header */
1406                         len_index = struct_declaration_lookup_field_index(file_stream->parent.stream_packet_context->declaration, g_quark_from_static_string("packet_size"));
1407                         if (len_index >= 0) {
1408                                 struct definition *field;
1409
1410                                 field = struct_definition_get_field_from_index(file_stream->parent.stream_packet_context, len_index);
1411                                 packet_index.packet_size = bt_get_unsigned_int(field);
1412                         } else {
1413                                 /* Use content size if non-zero, else file size */
1414                                 packet_index.packet_size = packet_index.content_size ? : filestats.st_size * CHAR_BIT;
1415                         }
1416
1417                         /* read timestamp begin from header */
1418                         len_index = struct_declaration_lookup_field_index(file_stream->parent.stream_packet_context->declaration, g_quark_from_static_string("timestamp_begin"));
1419                         if (len_index >= 0) {
1420                                 struct definition *field;
1421
1422                                 field = struct_definition_get_field_from_index(file_stream->parent.stream_packet_context, len_index);
1423                                 packet_index.timestamp_begin = bt_get_unsigned_int(field);
1424                                 if (file_stream->parent.stream_class->trace->collection) {
1425                                         packet_index.timestamp_begin =
1426                                                 ctf_get_real_timestamp(
1427                                                         &file_stream->parent,
1428                                                         packet_index.timestamp_begin);
1429                                 }
1430                         }
1431
1432                         /* read timestamp end from header */
1433                         len_index = struct_declaration_lookup_field_index(file_stream->parent.stream_packet_context->declaration, g_quark_from_static_string("timestamp_end"));
1434                         if (len_index >= 0) {
1435                                 struct definition *field;
1436
1437                                 field = struct_definition_get_field_from_index(file_stream->parent.stream_packet_context, len_index);
1438                                 packet_index.timestamp_end = bt_get_unsigned_int(field);
1439                                 if (file_stream->parent.stream_class->trace->collection) {
1440                                         packet_index.timestamp_end =
1441                                                 ctf_get_real_timestamp(
1442                                                         &file_stream->parent,
1443                                                         packet_index.timestamp_end);
1444                                 }
1445                         }
1446
1447                         /* read events discarded from header */
1448                         len_index = struct_declaration_lookup_field_index(file_stream->parent.stream_packet_context->declaration, g_quark_from_static_string("events_discarded"));
1449                         if (len_index >= 0) {
1450                                 struct definition *field;
1451
1452                                 field = struct_definition_get_field_from_index(file_stream->parent.stream_packet_context, len_index);
1453                                 packet_index.events_discarded = bt_get_unsigned_int(field);
1454                                 packet_index.events_discarded_len = bt_get_int_len(field);
1455                         }
1456                 } else {
1457                         /* Use file size for packet size */
1458                         packet_index.content_size = filestats.st_size * CHAR_BIT;
1459                         /* Use content size if non-zero, else file size */
1460                         packet_index.packet_size = packet_index.content_size ? : filestats.st_size * CHAR_BIT;
1461                 }
1462
1463                 /* Validate content size and packet size values */
1464                 if (packet_index.content_size > packet_index.packet_size) {
1465                         fprintf(stderr, "[error] Content size (%" PRIu64 " bits) is larger than packet size (%" PRIu64 " bits).\n",
1466                                 packet_index.content_size, packet_index.packet_size);
1467                         return -EINVAL;
1468                 }
1469
1470                 if (packet_index.packet_size > ((uint64_t)filestats.st_size - packet_index.offset) * CHAR_BIT) {
1471                         fprintf(stderr, "[error] Packet size (%" PRIu64 " bits) is larger than remaining file size (%" PRIu64 " bits).\n",
1472                                 packet_index.packet_size, ((uint64_t)filestats.st_size - packet_index.offset) * CHAR_BIT);
1473                         return -EINVAL;
1474                 }
1475
1476                 /* Save position after header and context */
1477                 packet_index.data_offset = pos->offset;
1478
1479                 /* add index to packet array */
1480                 g_array_append_val(file_stream->pos.packet_cycles_index, packet_index);
1481
1482                 pos->mmap_offset += packet_index.packet_size / CHAR_BIT;
1483         }
1484
1485         return 0;
1486 }
1487
1488 static
1489 int create_trace_definitions(struct ctf_trace *td, struct ctf_stream_definition *stream)
1490 {
1491         int ret;
1492
1493         if (td->packet_header_decl) {
1494                 struct definition *definition =
1495                         td->packet_header_decl->p.definition_new(&td->packet_header_decl->p,
1496                                 stream->parent_def_scope, 0, 0, "trace.packet.header");
1497                 if (!definition) {
1498                         ret = -EINVAL;
1499                         goto error;
1500                 }
1501                 stream->trace_packet_header =
1502                         container_of(definition, struct definition_struct, p);
1503                 stream->parent_def_scope = stream->trace_packet_header->p.scope;
1504         }
1505
1506         return 0;
1507
1508 error:
1509         return ret;
1510 }
1511
1512 /*
1513  * Note: many file streams can inherit from the same stream class
1514  * description (metadata).
1515  */
1516 static
1517 int ctf_open_file_stream_read(struct ctf_trace *td, const char *path, int flags,
1518                 void (*packet_seek)(struct stream_pos *pos, size_t index,
1519                         int whence))
1520 {
1521         int ret, fd, closeret;
1522         struct ctf_file_stream *file_stream;
1523         struct stat statbuf;
1524
1525         fd = openat(td->dirfd, path, flags);
1526         if (fd < 0) {
1527                 perror("File stream openat()");
1528                 ret = fd;
1529                 goto error;
1530         }
1531
1532         /* Don't try to mmap subdirectories. Skip them, return success. */
1533         ret = fstat(fd, &statbuf);
1534         if (ret) {
1535                 perror("File stream fstat()");
1536                 goto fstat_error;
1537         }
1538         if (S_ISDIR(statbuf.st_mode)) {
1539                 fprintf(stderr, "[warning] Skipping directory '%s' found in trace\n", path);
1540                 ret = 0;
1541                 goto fd_is_dir_ok;
1542         }
1543
1544         file_stream = g_new0(struct ctf_file_stream, 1);
1545         file_stream->pos.last_offset = LAST_OFFSET_POISON;
1546
1547         if (packet_seek) {
1548                 file_stream->pos.packet_seek = packet_seek;
1549         } else {
1550                 fprintf(stderr, "[error] packet_seek function undefined.\n");
1551                 ret = -1;
1552                 goto error_def;
1553         }
1554
1555         ret = ctf_init_pos(&file_stream->pos, fd, flags);
1556         if (ret)
1557                 goto error_def;
1558         ret = create_trace_definitions(td, &file_stream->parent);
1559         if (ret)
1560                 goto error_def;
1561         /*
1562          * For now, only a single clock per trace is supported.
1563          */
1564         file_stream->parent.current_clock = td->single_clock;
1565         ret = create_stream_packet_index(td, file_stream);
1566         if (ret)
1567                 goto error_index;
1568         /* Add stream file to stream class */
1569         g_ptr_array_add(file_stream->parent.stream_class->streams,
1570                         &file_stream->parent);
1571         return 0;
1572
1573 error_index:
1574         if (file_stream->parent.trace_packet_header)
1575                 bt_definition_unref(&file_stream->parent.trace_packet_header->p);
1576 error_def:
1577         closeret = ctf_fini_pos(&file_stream->pos);
1578         if (closeret) {
1579                 fprintf(stderr, "Error on ctf_fini_pos\n");
1580         }
1581         g_free(file_stream);
1582 fd_is_dir_ok:
1583 fstat_error:
1584         closeret = close(fd);
1585         if (closeret) {
1586                 perror("Error on fd close");
1587         }
1588 error:
1589         return ret;
1590 }
1591
1592 static
1593 int ctf_open_trace_read(struct ctf_trace *td,
1594                 const char *path, int flags,
1595                 void (*packet_seek)(struct stream_pos *pos, size_t index,
1596                         int whence), FILE *metadata_fp)
1597 {
1598         int ret, closeret;
1599         struct dirent *dirent;
1600         struct dirent *diriter;
1601         size_t dirent_len;
1602
1603         td->flags = flags;
1604
1605         /* Open trace directory */
1606         td->dir = opendir(path);
1607         if (!td->dir) {
1608                 fprintf(stderr, "[error] Unable to open trace directory \"%s\".\n", path);
1609                 ret = -ENOENT;
1610                 goto error;
1611         }
1612
1613         td->dirfd = open(path, 0);
1614         if (td->dirfd < 0) {
1615                 fprintf(stderr, "[error] Unable to open trace directory file descriptor for path \"%s\".\n", path);
1616                 perror("Trace directory open");
1617                 ret = -errno;
1618                 goto error_dirfd;
1619         }
1620         strncpy(td->path, path, sizeof(td->path));
1621         td->path[sizeof(td->path) - 1] = '\0';
1622
1623         /*
1624          * Keep the metadata file separate.
1625          */
1626
1627         ret = ctf_open_trace_metadata_read(td, packet_seek, metadata_fp);
1628         if (ret) {
1629                 fprintf(stderr, "[warning] Unable to open trace metadata for path \"%s\".\n", path);
1630                 goto error_metadata;
1631         }
1632
1633         /*
1634          * Open each stream: for each file, try to open, check magic
1635          * number, and get the stream ID to add to the right location in
1636          * the stream array.
1637          */
1638
1639         dirent_len = offsetof(struct dirent, d_name) +
1640                         fpathconf(td->dirfd, _PC_NAME_MAX) + 1;
1641
1642         dirent = malloc(dirent_len);
1643
1644         for (;;) {
1645                 ret = readdir_r(td->dir, dirent, &diriter);
1646                 if (ret) {
1647                         fprintf(stderr, "[error] Readdir error.\n");
1648                         goto readdir_error;
1649                 }
1650                 if (!diriter)
1651                         break;
1652                 /* Ignore hidden files, ., .. and metadata. */
1653                 if (!strncmp(diriter->d_name, ".", 1)
1654                                 || !strcmp(diriter->d_name, "..")
1655                                 || !strcmp(diriter->d_name, "metadata"))
1656                         continue;
1657                 ret = ctf_open_file_stream_read(td, diriter->d_name,
1658                                         flags, packet_seek);
1659                 if (ret) {
1660                         fprintf(stderr, "[error] Open file stream error.\n");
1661                         goto readdir_error;
1662                 }
1663         }
1664
1665         free(dirent);
1666         return 0;
1667
1668 readdir_error:
1669         free(dirent);
1670 error_metadata:
1671         closeret = close(td->dirfd);
1672         if (closeret) {
1673                 perror("Error on fd close");
1674         }
1675 error_dirfd:
1676         closeret = closedir(td->dir);
1677         if (closeret) {
1678                 perror("Error on closedir");
1679         }
1680 error:
1681         return ret;
1682 }
1683
1684 /*
1685  * ctf_open_trace: Open a CTF trace and index it.
1686  * Note that the user must seek the trace after the open (using the iterator)
1687  * since the index creation read it entirely.
1688  */
1689 static
1690 struct trace_descriptor *ctf_open_trace(const char *path, int flags,
1691                 void (*packet_seek)(struct stream_pos *pos, size_t index,
1692                         int whence), FILE *metadata_fp)
1693 {
1694         struct ctf_trace *td;
1695         int ret;
1696
1697         /*
1698          * If packet_seek is NULL, we provide our default version.
1699          */
1700         if (!packet_seek)
1701                 packet_seek = ctf_packet_seek;
1702
1703         td = g_new0(struct ctf_trace, 1);
1704
1705         switch (flags & O_ACCMODE) {
1706         case O_RDONLY:
1707                 if (!path) {
1708                         fprintf(stderr, "[error] Path missing for input CTF trace.\n");
1709                         goto error;
1710                 }
1711                 ret = ctf_open_trace_read(td, path, flags, packet_seek, metadata_fp);
1712                 if (ret)
1713                         goto error;
1714                 break;
1715         case O_RDWR:
1716                 fprintf(stderr, "[error] Opening CTF traces for output is not supported yet.\n");
1717                 goto error;
1718         default:
1719                 fprintf(stderr, "[error] Incorrect open flags.\n");
1720                 goto error;
1721         }
1722
1723         return &td->parent;
1724 error:
1725         g_free(td);
1726         return NULL;
1727 }
1728
1729 static
1730 void ctf_init_mmap_pos(struct ctf_stream_pos *pos,
1731                 struct mmap_stream *mmap_info)
1732 {
1733         pos->mmap_offset = 0;
1734         pos->packet_size = 0;
1735         pos->content_size = 0;
1736         pos->content_size_loc = NULL;
1737         pos->fd = mmap_info->fd;
1738         pos->base_mma = NULL;
1739         pos->offset = 0;
1740         pos->dummy = false;
1741         pos->cur_index = 0;
1742         pos->packet_cycles_index = NULL;
1743         pos->packet_real_index = NULL;
1744         pos->prot = PROT_READ;
1745         pos->flags = MAP_PRIVATE;
1746         pos->parent.rw_table = read_dispatch_table;
1747         pos->parent.event_cb = ctf_read_event;
1748 }
1749
1750 static
1751 int prepare_mmap_stream_definition(struct ctf_trace *td,
1752                 struct ctf_file_stream *file_stream)
1753 {
1754         struct ctf_stream_declaration *stream;
1755         uint64_t stream_id = 0;
1756         int ret;
1757
1758         file_stream->parent.stream_id = stream_id;
1759         if (stream_id >= td->streams->len) {
1760                 fprintf(stderr, "[error] Stream %" PRIu64 " is not declared "
1761                                 "in metadata.\n", stream_id);
1762                 ret = -EINVAL;
1763                 goto end;
1764         }
1765         stream = g_ptr_array_index(td->streams, stream_id);
1766         if (!stream) {
1767                 fprintf(stderr, "[error] Stream %" PRIu64 " is not declared "
1768                                 "in metadata.\n", stream_id);
1769                 ret = -EINVAL;
1770                 goto end;
1771         }
1772         file_stream->parent.stream_class = stream;
1773         ret = create_stream_definitions(td, &file_stream->parent);
1774 end:
1775         return ret;
1776 }
1777
1778 static
1779 int ctf_open_mmap_stream_read(struct ctf_trace *td,
1780                 struct mmap_stream *mmap_info,
1781                 void (*packet_seek)(struct stream_pos *pos, size_t index,
1782                         int whence))
1783 {
1784         int ret;
1785         struct ctf_file_stream *file_stream;
1786
1787         file_stream = g_new0(struct ctf_file_stream, 1);
1788         file_stream->pos.last_offset = LAST_OFFSET_POISON;
1789         ctf_init_mmap_pos(&file_stream->pos, mmap_info);
1790
1791         file_stream->pos.packet_seek = packet_seek;
1792
1793         ret = create_trace_definitions(td, &file_stream->parent);
1794         if (ret) {
1795                 goto error_def;
1796         }
1797
1798         ret = prepare_mmap_stream_definition(td, file_stream);
1799         if (ret)
1800                 goto error_index;
1801
1802         /*
1803          * For now, only a single clock per trace is supported.
1804          */
1805         file_stream->parent.current_clock = td->single_clock;
1806
1807         /* Add stream file to stream class */
1808         g_ptr_array_add(file_stream->parent.stream_class->streams,
1809                         &file_stream->parent);
1810         return 0;
1811
1812 error_index:
1813         if (file_stream->parent.trace_packet_header)
1814                 bt_definition_unref(&file_stream->parent.trace_packet_header->p);
1815 error_def:
1816         g_free(file_stream);
1817         return ret;
1818 }
1819
1820 static
1821 int ctf_open_mmap_trace_read(struct ctf_trace *td,
1822                 struct mmap_stream_list *mmap_list,
1823                 void (*packet_seek)(struct stream_pos *pos, size_t index,
1824                         int whence),
1825                 FILE *metadata_fp)
1826 {
1827         int ret;
1828         struct mmap_stream *mmap_info;
1829
1830         ret = ctf_open_trace_metadata_read(td, ctf_packet_seek, metadata_fp);
1831         if (ret) {
1832                 goto error;
1833         }
1834
1835         /*
1836          * for each stream, try to open, check magic number, and get the
1837          * stream ID to add to the right location in the stream array.
1838          */
1839         bt_list_for_each_entry(mmap_info, &mmap_list->head, list) {
1840                 ret = ctf_open_mmap_stream_read(td, mmap_info, packet_seek);
1841                 if (ret) {
1842                         fprintf(stderr, "[error] Open file mmap stream error.\n");
1843                         goto error;
1844                 }
1845         }
1846
1847         return 0;
1848
1849 error:
1850         return ret;
1851 }
1852
1853 static
1854 struct trace_descriptor *ctf_open_mmap_trace(
1855                 struct mmap_stream_list *mmap_list,
1856                 void (*packet_seek)(struct stream_pos *pos, size_t index,
1857                         int whence),
1858                 FILE *metadata_fp)
1859 {
1860         struct ctf_trace *td;
1861         int ret;
1862
1863         if (!metadata_fp) {
1864                 fprintf(stderr, "[error] No metadata file pointer associated, "
1865                                 "required for mmap parsing\n");
1866                 goto error;
1867         }
1868         if (!packet_seek) {
1869                 fprintf(stderr, "[error] packet_seek function undefined.\n");
1870                 goto error;
1871         }
1872         td = g_new0(struct ctf_trace, 1);
1873         ret = ctf_open_mmap_trace_read(td, mmap_list, packet_seek, metadata_fp);
1874         if (ret)
1875                 goto error_free;
1876
1877         return &td->parent;
1878
1879 error_free:
1880         g_free(td);
1881 error:
1882         return NULL;
1883 }
1884
1885 static
1886 int ctf_convert_index_timestamp(struct trace_descriptor *tdp)
1887 {
1888         int i, j, k;
1889         struct ctf_trace *td = container_of(tdp, struct ctf_trace, parent);
1890
1891         /* for each stream_class */
1892         for (i = 0; i < td->streams->len; i++) {
1893                 struct ctf_stream_declaration *stream_class;
1894
1895                 stream_class = g_ptr_array_index(td->streams, i);
1896                 if (!stream_class)
1897                         continue;
1898                 /* for each file_stream */
1899                 for (j = 0; j < stream_class->streams->len; j++) {
1900                         struct ctf_stream_definition *stream;
1901                         struct ctf_stream_pos *stream_pos;
1902                         struct ctf_file_stream *cfs;
1903
1904                         stream = g_ptr_array_index(stream_class->streams, j);
1905                         if (!stream)
1906                                 continue;
1907                         cfs = container_of(stream, struct ctf_file_stream,
1908                                         parent);
1909                         stream_pos = &cfs->pos;
1910                         if (!stream_pos->packet_cycles_index)
1911                                 continue;
1912
1913                         for (k = 0; k < stream_pos->packet_cycles_index->len; k++) {
1914                                 struct packet_index *index;
1915                                 struct packet_index new_index;
1916
1917                                 index = &g_array_index(stream_pos->packet_cycles_index,
1918                                                 struct packet_index, k);
1919                                 memcpy(&new_index, index,
1920                                                 sizeof(struct packet_index));
1921                                 new_index.timestamp_begin =
1922                                         ctf_get_real_timestamp(stream,
1923                                                         index->timestamp_begin);
1924                                 new_index.timestamp_end =
1925                                         ctf_get_real_timestamp(stream,
1926                                                         index->timestamp_end);
1927                                 g_array_append_val(stream_pos->packet_real_index,
1928                                                 new_index);
1929                         }
1930                 }
1931         }
1932         return 0;
1933 }
1934
1935 static
1936 int ctf_close_file_stream(struct ctf_file_stream *file_stream)
1937 {
1938         int ret;
1939
1940         ret = ctf_fini_pos(&file_stream->pos);
1941         if (ret) {
1942                 fprintf(stderr, "Error on ctf_fini_pos\n");
1943                 return -1;
1944         }
1945         ret = close(file_stream->pos.fd);
1946         if (ret) {
1947                 perror("Error closing file fd");
1948                 return -1;
1949         }
1950         return 0;
1951 }
1952
1953 static
1954 int ctf_close_trace(struct trace_descriptor *tdp)
1955 {
1956         struct ctf_trace *td = container_of(tdp, struct ctf_trace, parent);
1957         int ret;
1958
1959         if (td->streams) {
1960                 int i;
1961
1962                 for (i = 0; i < td->streams->len; i++) {
1963                         struct ctf_stream_declaration *stream;
1964                         int j;
1965
1966                         stream = g_ptr_array_index(td->streams, i);
1967                         if (!stream)
1968                                 continue;
1969                         for (j = 0; j < stream->streams->len; j++) {
1970                                 struct ctf_file_stream *file_stream;
1971                                 file_stream = container_of(g_ptr_array_index(stream->streams, j),
1972                                                 struct ctf_file_stream, parent);
1973                                 ret = ctf_close_file_stream(file_stream);
1974                                 if (ret)
1975                                         return ret;
1976                         }
1977                 }
1978         }
1979         ctf_destroy_metadata(td);
1980         ret = close(td->dirfd);
1981         if (ret) {
1982                 perror("Error closing dirfd");
1983                 return ret;
1984         }
1985         ret = closedir(td->dir);
1986         if (ret) {
1987                 perror("Error closedir");
1988                 return ret;
1989         }
1990         g_free(td);
1991         return 0;
1992 }
1993
1994 static
1995 void ctf_set_context(struct trace_descriptor *descriptor,
1996                 struct bt_context *ctx)
1997 {
1998         struct ctf_trace *td = container_of(descriptor, struct ctf_trace,
1999                         parent);
2000
2001         td->ctx = ctx;
2002 }
2003
2004 static
2005 void ctf_set_handle(struct trace_descriptor *descriptor,
2006                 struct bt_trace_handle *handle)
2007 {
2008         struct ctf_trace *td = container_of(descriptor, struct ctf_trace,
2009                         parent);
2010
2011         td->handle = handle;
2012 }
2013
2014 static
2015 void __attribute__((constructor)) ctf_init(void)
2016 {
2017         int ret;
2018
2019         ctf_format.name = g_quark_from_static_string("ctf");
2020         ret = bt_register_format(&ctf_format);
2021         assert(!ret);
2022 }
2023
2024 static
2025 void __attribute__((destructor)) ctf_exit(void)
2026 {
2027         bt_unregister_format(&ctf_format);
2028 }