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 bt_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 bt_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 bt_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 = bt_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 = bt_lookup_variant(&stream->stream_event_header->p, "v");
 443                 if (variant) {
 444                         integer_definition = bt_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 = bt_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 = bt_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 bt_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 bt_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, buflen;
 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         buflen = strlen(*buf);
1007         if (!buflen) {
1008                 *fp = NULL;
1009                 return -ENODATA;
1010         }
1011         *fp = babeltrace_fmemopen(*buf, buflen, "rb");
1012         if (!*fp) {
1013                 perror("Metadata fmemopen");
1014                 return -errno;
1015         }
1016         return 0;
1017 }
1018
1019 static
1020 int ctf_open_trace_metadata_read(struct ctf_trace *td,
1021                 void (*packet_seek)(struct bt_stream_pos *pos, size_t index,
1022                         int whence), FILE *metadata_fp)
1023 {
1024         struct ctf_scanner *scanner;
1025         struct ctf_file_stream *metadata_stream;
1026         FILE *fp;
1027         char *buf = NULL;
1028         int ret = 0, closeret;
1029
1030         metadata_stream = g_new0(struct ctf_file_stream, 1);
1031         metadata_stream->pos.last_offset = LAST_OFFSET_POISON;
1032
1033         if (packet_seek) {
1034                 metadata_stream->pos.packet_seek = packet_seek;
1035         } else {
1036                 fprintf(stderr, "[error] packet_seek function undefined.\n");
1037                 ret = -1;
1038                 goto end_free;
1039         }
1040
1041         if (metadata_fp) {
1042                 fp = metadata_fp;
1043                 metadata_stream->pos.fd = -1;
1044         } else {
1045                 td->metadata = &metadata_stream->parent;
1046                 metadata_stream->pos.fd = openat(td->dirfd, "metadata", O_RDONLY);
1047                 if (metadata_stream->pos.fd < 0) {
1048                         fprintf(stderr, "Unable to open metadata.\n");
1049                         ret = -1;
1050                         goto end_free;
1051                 }
1052
1053                 fp = fdopen(metadata_stream->pos.fd, "r");
1054                 if (!fp) {
1055                         fprintf(stderr, "[error] Unable to open metadata stream.\n");
1056                         perror("Metadata stream open");
1057                         ret = -errno;
1058                         goto end_stream;
1059                 }
1060                 /* fd now belongs to fp */
1061                 metadata_stream->pos.fd = -1;
1062         }
1063         if (babeltrace_debug)
1064                 yydebug = 1;
1065
1066         if (packet_metadata(td, fp)) {
1067                 ret = ctf_open_trace_metadata_stream_read(td, &fp, &buf);
1068                 if (ret) {
1069                         /* Warn about empty metadata */
1070                         fprintf(stderr, "[warning] Empty metadata.\n");
1071                         goto end_packet_read;
1072                 }
1073         } else {
1074                 unsigned int major, minor;
1075                 ssize_t nr_items;
1076
1077                 td->byte_order = BYTE_ORDER;
1078
1079                 /* Check text-only metadata header and version */
1080                 nr_items = fscanf(fp, "/* CTF %u.%u", &major, &minor);
1081                 if (nr_items < 2)
1082                         fprintf(stderr, "[warning] Ill-shapen or missing \"/* CTF x.y\" header for text-only metadata.\n");
1083                 if (check_version(major, minor) < 0) {
1084                         ret = -EINVAL;
1085                         goto end_packet_read;
1086                 }
1087                 rewind(fp);
1088         }
1089
1090         scanner = ctf_scanner_alloc(fp);
1091         if (!scanner) {
1092                 fprintf(stderr, "[error] Error allocating scanner\n");
1093                 ret = -ENOMEM;
1094                 goto end_scanner_alloc;
1095         }
1096         ret = ctf_scanner_append_ast(scanner);
1097         if (ret) {
1098                 fprintf(stderr, "[error] Error creating AST\n");
1099                 goto end;
1100         }
1101
1102         if (babeltrace_debug) {
1103                 ret = ctf_visitor_print_xml(stderr, 0, &scanner->ast->root);
1104                 if (ret) {
1105                         fprintf(stderr, "[error] Error visiting AST for XML output\n");
1106                         goto end;
1107                 }
1108         }
1109
1110         ret = ctf_visitor_semantic_check(stderr, 0, &scanner->ast->root);
1111         if (ret) {
1112                 fprintf(stderr, "[error] Error in CTF semantic validation %d\n", ret);
1113                 goto end;
1114         }
1115         ret = ctf_visitor_construct_metadata(stderr, 0, &scanner->ast->root,
1116                         td, td->byte_order);
1117         if (ret) {
1118                 fprintf(stderr, "[error] Error in CTF metadata constructor %d\n", ret);
1119                 goto end;
1120         }
1121 end:
1122         ctf_scanner_free(scanner);
1123 end_scanner_alloc:
1124 end_packet_read:
1125         if (fp) {
1126                 closeret = fclose(fp);
1127                 if (closeret) {
1128                         perror("Error on fclose");
1129                 }
1130         }
1131         free(buf);
1132 end_stream:
1133         if (metadata_stream->pos.fd >= 0) {
1134                 closeret = close(metadata_stream->pos.fd);
1135                 if (closeret) {
1136                         perror("Error on metadata stream fd close");
1137                 }
1138         }
1139 end_free:
1140         if (ret)
1141                 g_free(metadata_stream);
1142         return ret;
1143 }
1144
1145 static
1146 struct ctf_event_definition *create_event_definitions(struct ctf_trace *td,
1147                                                   struct ctf_stream_definition *stream,
1148                                                   struct ctf_event_declaration *event)
1149 {
1150         struct ctf_event_definition *stream_event = g_new0(struct ctf_event_definition, 1);
1151
1152         if (event->context_decl) {
1153                 struct definition *definition =
1154                         event->context_decl->p.definition_new(&event->context_decl->p,
1155                                 stream->parent_def_scope, 0, 0, "event.context");
1156                 if (!definition) {
1157                         goto error;
1158                 }
1159                 stream_event->event_context = container_of(definition,
1160                                         struct definition_struct, p);
1161                 stream->parent_def_scope = stream_event->event_context->p.scope;
1162         }
1163         if (event->fields_decl) {
1164                 struct definition *definition =
1165                         event->fields_decl->p.definition_new(&event->fields_decl->p,
1166                                 stream->parent_def_scope, 0, 0, "event.fields");
1167                 if (!definition) {
1168                         goto error;
1169                 }
1170                 stream_event->event_fields = container_of(definition,
1171                                         struct definition_struct, p);
1172                 stream->parent_def_scope = stream_event->event_fields->p.scope;
1173         }
1174         stream_event->stream = stream;
1175         return stream_event;
1176
1177 error:
1178         if (stream_event->event_fields)
1179                 bt_definition_unref(&stream_event->event_fields->p);
1180         if (stream_event->event_context)
1181                 bt_definition_unref(&stream_event->event_context->p);
1182         return NULL;
1183 }
1184
1185 static
1186 int create_stream_definitions(struct ctf_trace *td, struct ctf_stream_definition *stream)
1187 {
1188         struct ctf_stream_declaration *stream_class;
1189         int ret;
1190         int i;
1191
1192         if (stream->stream_definitions_created)
1193                 return 0;
1194
1195         stream_class = stream->stream_class;
1196
1197         if (stream_class->packet_context_decl) {
1198                 struct definition *definition =
1199                         stream_class->packet_context_decl->p.definition_new(&stream_class->packet_context_decl->p,
1200                                 stream->parent_def_scope, 0, 0, "stream.packet.context");
1201                 if (!definition) {
1202                         ret = -EINVAL;
1203                         goto error;
1204                 }
1205                 stream->stream_packet_context = container_of(definition,
1206                                                 struct definition_struct, p);
1207                 stream->parent_def_scope = stream->stream_packet_context->p.scope;
1208         }
1209         if (stream_class->event_header_decl) {
1210                 struct definition *definition =
1211                         stream_class->event_header_decl->p.definition_new(&stream_class->event_header_decl->p,
1212                                 stream->parent_def_scope, 0, 0, "stream.event.header");
1213                 if (!definition) {
1214                         ret = -EINVAL;
1215                         goto error;
1216                 }
1217                 stream->stream_event_header =
1218                         container_of(definition, struct definition_struct, p);
1219                 stream->parent_def_scope = stream->stream_event_header->p.scope;
1220         }
1221         if (stream_class->event_context_decl) {
1222                 struct definition *definition =
1223                         stream_class->event_context_decl->p.definition_new(&stream_class->event_context_decl->p,
1224                                 stream->parent_def_scope, 0, 0, "stream.event.context");
1225                 if (!definition) {
1226                         ret = -EINVAL;
1227                         goto error;
1228                 }
1229                 stream->stream_event_context =
1230                         container_of(definition, struct definition_struct, p);
1231                 stream->parent_def_scope = stream->stream_event_context->p.scope;
1232         }
1233         stream->events_by_id = g_ptr_array_new();
1234         g_ptr_array_set_size(stream->events_by_id, stream_class->events_by_id->len);
1235         for (i = 0; i < stream->events_by_id->len; i++) {
1236                 struct ctf_event_declaration *event = g_ptr_array_index(stream_class->events_by_id, i);
1237                 struct ctf_event_definition *stream_event;
1238
1239                 if (!event)
1240                         continue;
1241                 stream_event = create_event_definitions(td, stream, event);
1242                 if (!stream_event)
1243                         goto error_event;
1244                 g_ptr_array_index(stream->events_by_id, i) = stream_event;
1245         }
1246         return 0;
1247
1248 error_event:
1249         for (i = 0; i < stream->events_by_id->len; i++) {
1250                 struct ctf_event_definition *stream_event = g_ptr_array_index(stream->events_by_id, i);
1251                 if (stream_event)
1252                         g_free(stream_event);
1253         }
1254         g_ptr_array_free(stream->events_by_id, TRUE);
1255 error:
1256         if (stream->stream_event_context)
1257                 bt_definition_unref(&stream->stream_event_context->p);
1258         if (stream->stream_event_header)
1259                 bt_definition_unref(&stream->stream_event_header->p);
1260         if (stream->stream_packet_context)
1261                 bt_definition_unref(&stream->stream_packet_context->p);
1262         return ret;
1263 }
1264
1265
1266 static
1267 int create_stream_packet_index(struct ctf_trace *td,
1268                                struct ctf_file_stream *file_stream)
1269 {
1270         struct ctf_stream_declaration *stream;
1271         int len_index;
1272         struct ctf_stream_pos *pos;
1273         struct stat filestats;
1274         struct packet_index packet_index;
1275         int first_packet = 1;
1276         int ret;
1277
1278         pos = &file_stream->pos;
1279
1280         ret = fstat(pos->fd, &filestats);
1281         if (ret < 0)
1282                 return ret;
1283
1284         if (filestats.st_size < MAX_PACKET_HEADER_LEN / CHAR_BIT)
1285                 return -EINVAL;
1286
1287         for (pos->mmap_offset = 0; pos->mmap_offset < filestats.st_size; ) {
1288                 uint64_t stream_id = 0;
1289
1290                 if (pos->base_mma) {
1291                         /* unmap old base */
1292                         ret = munmap_align(pos->base_mma);
1293                         if (ret) {
1294                                 fprintf(stderr, "[error] Unable to unmap old base: %s.\n",
1295                                         strerror(errno));
1296                                 return ret;
1297                         }
1298                         pos->base_mma = NULL;
1299                 }
1300                 /* map new base. Need mapping length from header. */
1301                 pos->base_mma = mmap_align(MAX_PACKET_HEADER_LEN / CHAR_BIT, PROT_READ,
1302                                  MAP_PRIVATE, pos->fd, pos->mmap_offset);
1303                 assert(pos->base_mma != MAP_FAILED);
1304                 pos->content_size = MAX_PACKET_HEADER_LEN;      /* Unknown at this point */
1305                 pos->packet_size = MAX_PACKET_HEADER_LEN;       /* Unknown at this point */
1306                 pos->offset = 0;        /* Position of the packet header */
1307
1308                 packet_index.offset = pos->mmap_offset;
1309                 packet_index.content_size = 0;
1310                 packet_index.packet_size = 0;
1311                 packet_index.timestamp_begin = 0;
1312                 packet_index.timestamp_end = 0;
1313                 packet_index.events_discarded = 0;
1314                 packet_index.events_discarded_len = 0;
1315
1316                 /* read and check header, set stream id (and check) */
1317                 if (file_stream->parent.trace_packet_header) {
1318                         /* Read packet header */
1319                         ret = generic_rw(&pos->parent, &file_stream->parent.trace_packet_header->p);
1320                         if (ret)
1321                                 return ret;
1322                         len_index = bt_struct_declaration_lookup_field_index(file_stream->parent.trace_packet_header->declaration, g_quark_from_static_string("magic"));
1323                         if (len_index >= 0) {
1324                                 struct definition *field;
1325                                 uint64_t magic;
1326
1327                                 field = bt_struct_definition_get_field_from_index(file_stream->parent.trace_packet_header, len_index);
1328                                 magic = bt_get_unsigned_int(field);
1329                                 if (magic != CTF_MAGIC) {
1330                                         fprintf(stderr, "[error] Invalid magic number 0x%" PRIX64 " at packet %u (file offset %zd).\n",
1331                                                         magic,
1332                                                         file_stream->pos.packet_cycles_index->len,
1333                                                         (ssize_t) pos->mmap_offset);
1334                                         return -EINVAL;
1335                                 }
1336                         }
1337
1338                         /* check uuid */
1339                         len_index = bt_struct_declaration_lookup_field_index(file_stream->parent.trace_packet_header->declaration, g_quark_from_static_string("uuid"));
1340                         if (len_index >= 0) {
1341                                 struct definition_array *defarray;
1342                                 struct definition *field;
1343                                 uint64_t i;
1344                                 uint8_t uuidval[BABELTRACE_UUID_LEN];
1345
1346                                 field = bt_struct_definition_get_field_from_index(file_stream->parent.trace_packet_header, len_index);
1347                                 assert(field->declaration->id == CTF_TYPE_ARRAY);
1348                                 defarray = container_of(field, struct definition_array, p);
1349                                 assert(bt_array_len(defarray) == BABELTRACE_UUID_LEN);
1350
1351                                 for (i = 0; i < BABELTRACE_UUID_LEN; i++) {
1352                                         struct definition *elem;
1353
1354                                         elem = bt_array_index(defarray, i);
1355                                         uuidval[i] = bt_get_unsigned_int(elem);
1356                                 }
1357                                 ret = babeltrace_uuid_compare(td->uuid, uuidval);
1358                                 if (ret) {
1359                                         fprintf(stderr, "[error] Unique Universal Identifiers do not match.\n");
1360                                         return -EINVAL;
1361                                 }
1362                         }
1363
1364
1365                         len_index = bt_struct_declaration_lookup_field_index(file_stream->parent.trace_packet_header->declaration, g_quark_from_static_string("stream_id"));
1366                         if (len_index >= 0) {
1367                                 struct definition *field;
1368
1369                                 field = bt_struct_definition_get_field_from_index(file_stream->parent.trace_packet_header, len_index);
1370                                 stream_id = bt_get_unsigned_int(field);
1371                         }
1372                 }
1373
1374                 if (!first_packet && file_stream->parent.stream_id != stream_id) {
1375                         fprintf(stderr, "[error] Stream ID is changing within a stream.\n");
1376                         return -EINVAL;
1377                 }
1378                 if (first_packet) {
1379                         file_stream->parent.stream_id = stream_id;
1380                         if (stream_id >= td->streams->len) {
1381                                 fprintf(stderr, "[error] Stream %" PRIu64 " is not declared in metadata.\n", stream_id);
1382                                 return -EINVAL;
1383                         }
1384                         stream = g_ptr_array_index(td->streams, stream_id);
1385                         if (!stream) {
1386                                 fprintf(stderr, "[error] Stream %" PRIu64 " is not declared in metadata.\n", stream_id);
1387                                 return -EINVAL;
1388                         }
1389                         file_stream->parent.stream_class = stream;
1390                         ret = create_stream_definitions(td, &file_stream->parent);
1391                         if (ret)
1392                                 return ret;
1393                 }
1394                 first_packet = 0;
1395
1396                 if (file_stream->parent.stream_packet_context) {
1397                         /* Read packet context */
1398                         ret = generic_rw(&pos->parent, &file_stream->parent.stream_packet_context->p);
1399                         if (ret)
1400                                 return ret;
1401                         /* read content size from header */
1402                         len_index = bt_struct_declaration_lookup_field_index(file_stream->parent.stream_packet_context->declaration, g_quark_from_static_string("content_size"));
1403                         if (len_index >= 0) {
1404                                 struct definition *field;
1405
1406                                 field = bt_struct_definition_get_field_from_index(file_stream->parent.stream_packet_context, len_index);
1407                                 packet_index.content_size = bt_get_unsigned_int(field);
1408                         } else {
1409                                 /* Use file size for packet size */
1410                                 packet_index.content_size = filestats.st_size * CHAR_BIT;
1411                         }
1412
1413                         /* read packet size from header */
1414                         len_index = bt_struct_declaration_lookup_field_index(file_stream->parent.stream_packet_context->declaration, g_quark_from_static_string("packet_size"));
1415                         if (len_index >= 0) {
1416                                 struct definition *field;
1417
1418                                 field = bt_struct_definition_get_field_from_index(file_stream->parent.stream_packet_context, len_index);
1419                                 packet_index.packet_size = bt_get_unsigned_int(field);
1420                         } else {
1421                                 /* Use content size if non-zero, else file size */
1422                                 packet_index.packet_size = packet_index.content_size ? : filestats.st_size * CHAR_BIT;
1423                         }
1424
1425                         /* read timestamp begin from header */
1426                         len_index = bt_struct_declaration_lookup_field_index(file_stream->parent.stream_packet_context->declaration, g_quark_from_static_string("timestamp_begin"));
1427                         if (len_index >= 0) {
1428                                 struct definition *field;
1429
1430                                 field = bt_struct_definition_get_field_from_index(file_stream->parent.stream_packet_context, len_index);
1431                                 packet_index.timestamp_begin = bt_get_unsigned_int(field);
1432                                 if (file_stream->parent.stream_class->trace->collection) {
1433                                         packet_index.timestamp_begin =
1434                                                 ctf_get_real_timestamp(
1435                                                         &file_stream->parent,
1436                                                         packet_index.timestamp_begin);
1437                                 }
1438                         }
1439
1440                         /* read timestamp end from header */
1441                         len_index = bt_struct_declaration_lookup_field_index(file_stream->parent.stream_packet_context->declaration, g_quark_from_static_string("timestamp_end"));
1442                         if (len_index >= 0) {
1443                                 struct definition *field;
1444
1445                                 field = bt_struct_definition_get_field_from_index(file_stream->parent.stream_packet_context, len_index);
1446                                 packet_index.timestamp_end = bt_get_unsigned_int(field);
1447                                 if (file_stream->parent.stream_class->trace->collection) {
1448                                         packet_index.timestamp_end =
1449                                                 ctf_get_real_timestamp(
1450                                                         &file_stream->parent,
1451                                                         packet_index.timestamp_end);
1452                                 }
1453                         }
1454
1455                         /* read events discarded from header */
1456                         len_index = bt_struct_declaration_lookup_field_index(file_stream->parent.stream_packet_context->declaration, g_quark_from_static_string("events_discarded"));
1457                         if (len_index >= 0) {
1458                                 struct definition *field;
1459
1460                                 field = bt_struct_definition_get_field_from_index(file_stream->parent.stream_packet_context, len_index);
1461                                 packet_index.events_discarded = bt_get_unsigned_int(field);
1462                                 packet_index.events_discarded_len = bt_get_int_len(field);
1463                         }
1464                 } else {
1465                         /* Use file size for packet size */
1466                         packet_index.content_size = filestats.st_size * CHAR_BIT;
1467                         /* Use content size if non-zero, else file size */
1468                         packet_index.packet_size = packet_index.content_size ? : filestats.st_size * CHAR_BIT;
1469                 }
1470
1471                 /* Validate content size and packet size values */
1472                 if (packet_index.content_size > packet_index.packet_size) {
1473                         fprintf(stderr, "[error] Content size (%" PRIu64 " bits) is larger than packet size (%" PRIu64 " bits).\n",
1474                                 packet_index.content_size, packet_index.packet_size);
1475                         return -EINVAL;
1476                 }
1477
1478                 if (packet_index.packet_size > ((uint64_t)filestats.st_size - packet_index.offset) * CHAR_BIT) {
1479                         fprintf(stderr, "[error] Packet size (%" PRIu64 " bits) is larger than remaining file size (%" PRIu64 " bits).\n",
1480                                 packet_index.packet_size, ((uint64_t)filestats.st_size - packet_index.offset) * CHAR_BIT);
1481                         return -EINVAL;
1482                 }
1483
1484                 /* Save position after header and context */
1485                 packet_index.data_offset = pos->offset;
1486
1487                 /* add index to packet array */
1488                 g_array_append_val(file_stream->pos.packet_cycles_index, packet_index);
1489
1490                 pos->mmap_offset += packet_index.packet_size / CHAR_BIT;
1491         }
1492
1493         return 0;
1494 }
1495
1496 static
1497 int create_trace_definitions(struct ctf_trace *td, struct ctf_stream_definition *stream)
1498 {
1499         int ret;
1500
1501         if (td->packet_header_decl) {
1502                 struct definition *definition =
1503                         td->packet_header_decl->p.definition_new(&td->packet_header_decl->p,
1504                                 stream->parent_def_scope, 0, 0, "trace.packet.header");
1505                 if (!definition) {
1506                         ret = -EINVAL;
1507                         goto error;
1508                 }
1509                 stream->trace_packet_header =
1510                         container_of(definition, struct definition_struct, p);
1511                 stream->parent_def_scope = stream->trace_packet_header->p.scope;
1512         }
1513
1514         return 0;
1515
1516 error:
1517         return ret;
1518 }
1519
1520 /*
1521  * Note: many file streams can inherit from the same stream class
1522  * description (metadata).
1523  */
1524 static
1525 int ctf_open_file_stream_read(struct ctf_trace *td, const char *path, int flags,
1526                 void (*packet_seek)(struct bt_stream_pos *pos, size_t index,
1527                         int whence))
1528 {
1529         int ret, fd, closeret;
1530         struct ctf_file_stream *file_stream;
1531         struct stat statbuf;
1532
1533         fd = openat(td->dirfd, path, flags);
1534         if (fd < 0) {
1535                 perror("File stream openat()");
1536                 ret = fd;
1537                 goto error;
1538         }
1539
1540         /* Don't try to mmap subdirectories. Skip them, return success. */
1541         ret = fstat(fd, &statbuf);
1542         if (ret) {
1543                 perror("File stream fstat()");
1544                 goto fstat_error;
1545         }
1546         if (S_ISDIR(statbuf.st_mode)) {
1547                 fprintf(stderr, "[warning] Skipping directory '%s' found in trace\n", path);
1548                 ret = 0;
1549                 goto fd_is_dir_ok;
1550         }
1551
1552         file_stream = g_new0(struct ctf_file_stream, 1);
1553         file_stream->pos.last_offset = LAST_OFFSET_POISON;
1554
1555         if (packet_seek) {
1556                 file_stream->pos.packet_seek = packet_seek;
1557         } else {
1558                 fprintf(stderr, "[error] packet_seek function undefined.\n");
1559                 ret = -1;
1560                 goto error_def;
1561         }
1562
1563         ret = ctf_init_pos(&file_stream->pos, fd, flags);
1564         if (ret)
1565                 goto error_def;
1566         ret = create_trace_definitions(td, &file_stream->parent);
1567         if (ret)
1568                 goto error_def;
1569         /*
1570          * For now, only a single clock per trace is supported.
1571          */
1572         file_stream->parent.current_clock = td->single_clock;
1573         ret = create_stream_packet_index(td, file_stream);
1574         if (ret)
1575                 goto error_index;
1576         /* Add stream file to stream class */
1577         g_ptr_array_add(file_stream->parent.stream_class->streams,
1578                         &file_stream->parent);
1579         return 0;
1580
1581 error_index:
1582         if (file_stream->parent.trace_packet_header)
1583                 bt_definition_unref(&file_stream->parent.trace_packet_header->p);
1584 error_def:
1585         closeret = ctf_fini_pos(&file_stream->pos);
1586         if (closeret) {
1587                 fprintf(stderr, "Error on ctf_fini_pos\n");
1588         }
1589         g_free(file_stream);
1590 fd_is_dir_ok:
1591 fstat_error:
1592         closeret = close(fd);
1593         if (closeret) {
1594                 perror("Error on fd close");
1595         }
1596 error:
1597         return ret;
1598 }
1599
1600 static
1601 int ctf_open_trace_read(struct ctf_trace *td,
1602                 const char *path, int flags,
1603                 void (*packet_seek)(struct bt_stream_pos *pos, size_t index,
1604                         int whence), FILE *metadata_fp)
1605 {
1606         int ret, closeret;
1607         struct dirent *dirent;
1608         struct dirent *diriter;
1609         size_t dirent_len;
1610
1611         td->flags = flags;
1612
1613         /* Open trace directory */
1614         td->dir = opendir(path);
1615         if (!td->dir) {
1616                 fprintf(stderr, "[error] Unable to open trace directory \"%s\".\n", path);
1617                 ret = -ENOENT;
1618                 goto error;
1619         }
1620
1621         td->dirfd = open(path, 0);
1622         if (td->dirfd < 0) {
1623                 fprintf(stderr, "[error] Unable to open trace directory file descriptor for path \"%s\".\n", path);
1624                 perror("Trace directory open");
1625                 ret = -errno;
1626                 goto error_dirfd;
1627         }
1628         strncpy(td->path, path, sizeof(td->path));
1629         td->path[sizeof(td->path) - 1] = '\0';
1630
1631         /*
1632          * Keep the metadata file separate.
1633          */
1634
1635         ret = ctf_open_trace_metadata_read(td, packet_seek, metadata_fp);
1636         if (ret) {
1637                 fprintf(stderr, "[warning] Unable to open trace metadata for path \"%s\".\n", path);
1638                 goto error_metadata;
1639         }
1640
1641         /*
1642          * Open each stream: for each file, try to open, check magic
1643          * number, and get the stream ID to add to the right location in
1644          * the stream array.
1645          */
1646
1647         dirent_len = offsetof(struct dirent, d_name) +
1648                         fpathconf(td->dirfd, _PC_NAME_MAX) + 1;
1649
1650         dirent = malloc(dirent_len);
1651
1652         for (;;) {
1653                 ret = readdir_r(td->dir, dirent, &diriter);
1654                 if (ret) {
1655                         fprintf(stderr, "[error] Readdir error.\n");
1656                         goto readdir_error;
1657                 }
1658                 if (!diriter)
1659                         break;
1660                 /* Ignore hidden files, ., .. and metadata. */
1661                 if (!strncmp(diriter->d_name, ".", 1)
1662                                 || !strcmp(diriter->d_name, "..")
1663                                 || !strcmp(diriter->d_name, "metadata"))
1664                         continue;
1665                 ret = ctf_open_file_stream_read(td, diriter->d_name,
1666                                         flags, packet_seek);
1667                 if (ret) {
1668                         fprintf(stderr, "[error] Open file stream error.\n");
1669                         goto readdir_error;
1670                 }
1671         }
1672
1673         free(dirent);
1674         return 0;
1675
1676 readdir_error:
1677         free(dirent);
1678 error_metadata:
1679         closeret = close(td->dirfd);
1680         if (closeret) {
1681                 perror("Error on fd close");
1682         }
1683 error_dirfd:
1684         closeret = closedir(td->dir);
1685         if (closeret) {
1686                 perror("Error on closedir");
1687         }
1688 error:
1689         return ret;
1690 }
1691
1692 /*
1693  * ctf_open_trace: Open a CTF trace and index it.
1694  * Note that the user must seek the trace after the open (using the iterator)
1695  * since the index creation read it entirely.
1696  */
1697 static
1698 struct trace_descriptor *ctf_open_trace(const char *path, int flags,
1699                 void (*packet_seek)(struct bt_stream_pos *pos, size_t index,
1700                         int whence), FILE *metadata_fp)
1701 {
1702         struct ctf_trace *td;
1703         int ret;
1704
1705         /*
1706          * If packet_seek is NULL, we provide our default version.
1707          */
1708         if (!packet_seek)
1709                 packet_seek = ctf_packet_seek;
1710
1711         td = g_new0(struct ctf_trace, 1);
1712
1713         switch (flags & O_ACCMODE) {
1714         case O_RDONLY:
1715                 if (!path) {
1716                         fprintf(stderr, "[error] Path missing for input CTF trace.\n");
1717                         goto error;
1718                 }
1719                 ret = ctf_open_trace_read(td, path, flags, packet_seek, metadata_fp);
1720                 if (ret)
1721                         goto error;
1722                 break;
1723         case O_RDWR:
1724                 fprintf(stderr, "[error] Opening CTF traces for output is not supported yet.\n");
1725                 goto error;
1726         default:
1727                 fprintf(stderr, "[error] Incorrect open flags.\n");
1728                 goto error;
1729         }
1730
1731         return &td->parent;
1732 error:
1733         g_free(td);
1734         return NULL;
1735 }
1736
1737 static
1738 void ctf_init_mmap_pos(struct ctf_stream_pos *pos,
1739                 struct mmap_stream *mmap_info)
1740 {
1741         pos->mmap_offset = 0;
1742         pos->packet_size = 0;
1743         pos->content_size = 0;
1744         pos->content_size_loc = NULL;
1745         pos->fd = mmap_info->fd;
1746         pos->base_mma = NULL;
1747         pos->offset = 0;
1748         pos->dummy = false;
1749         pos->cur_index = 0;
1750         pos->packet_cycles_index = NULL;
1751         pos->packet_real_index = NULL;
1752         pos->prot = PROT_READ;
1753         pos->flags = MAP_PRIVATE;
1754         pos->parent.rw_table = read_dispatch_table;
1755         pos->parent.event_cb = ctf_read_event;
1756 }
1757
1758 static
1759 int prepare_mmap_stream_definition(struct ctf_trace *td,
1760                 struct ctf_file_stream *file_stream)
1761 {
1762         struct ctf_stream_declaration *stream;
1763         uint64_t stream_id = 0;
1764         int ret;
1765
1766         file_stream->parent.stream_id = stream_id;
1767         if (stream_id >= td->streams->len) {
1768                 fprintf(stderr, "[error] Stream %" PRIu64 " is not declared "
1769                                 "in metadata.\n", stream_id);
1770                 ret = -EINVAL;
1771                 goto end;
1772         }
1773         stream = g_ptr_array_index(td->streams, stream_id);
1774         if (!stream) {
1775                 fprintf(stderr, "[error] Stream %" PRIu64 " is not declared "
1776                                 "in metadata.\n", stream_id);
1777                 ret = -EINVAL;
1778                 goto end;
1779         }
1780         file_stream->parent.stream_class = stream;
1781         ret = create_stream_definitions(td, &file_stream->parent);
1782 end:
1783         return ret;
1784 }
1785
1786 static
1787 int ctf_open_mmap_stream_read(struct ctf_trace *td,
1788                 struct mmap_stream *mmap_info,
1789                 void (*packet_seek)(struct bt_stream_pos *pos, size_t index,
1790                         int whence))
1791 {
1792         int ret;
1793         struct ctf_file_stream *file_stream;
1794
1795         file_stream = g_new0(struct ctf_file_stream, 1);
1796         file_stream->pos.last_offset = LAST_OFFSET_POISON;
1797         ctf_init_mmap_pos(&file_stream->pos, mmap_info);
1798
1799         file_stream->pos.packet_seek = packet_seek;
1800
1801         ret = create_trace_definitions(td, &file_stream->parent);
1802         if (ret) {
1803                 goto error_def;
1804         }
1805
1806         ret = prepare_mmap_stream_definition(td, file_stream);
1807         if (ret)
1808                 goto error_index;
1809
1810         /*
1811          * For now, only a single clock per trace is supported.
1812          */
1813         file_stream->parent.current_clock = td->single_clock;
1814
1815         /* Add stream file to stream class */
1816         g_ptr_array_add(file_stream->parent.stream_class->streams,
1817                         &file_stream->parent);
1818         return 0;
1819
1820 error_index:
1821         if (file_stream->parent.trace_packet_header)
1822                 bt_definition_unref(&file_stream->parent.trace_packet_header->p);
1823 error_def:
1824         g_free(file_stream);
1825         return ret;
1826 }
1827
1828 static
1829 int ctf_open_mmap_trace_read(struct ctf_trace *td,
1830                 struct mmap_stream_list *mmap_list,
1831                 void (*packet_seek)(struct bt_stream_pos *pos, size_t index,
1832                         int whence),
1833                 FILE *metadata_fp)
1834 {
1835         int ret;
1836         struct mmap_stream *mmap_info;
1837
1838         ret = ctf_open_trace_metadata_read(td, ctf_packet_seek, metadata_fp);
1839         if (ret) {
1840                 goto error;
1841         }
1842
1843         /*
1844          * for each stream, try to open, check magic number, and get the
1845          * stream ID to add to the right location in the stream array.
1846          */
1847         bt_list_for_each_entry(mmap_info, &mmap_list->head, list) {
1848                 ret = ctf_open_mmap_stream_read(td, mmap_info, packet_seek);
1849                 if (ret) {
1850                         fprintf(stderr, "[error] Open file mmap stream error.\n");
1851                         goto error;
1852                 }
1853         }
1854
1855         return 0;
1856
1857 error:
1858         return ret;
1859 }
1860
1861 static
1862 struct trace_descriptor *ctf_open_mmap_trace(
1863                 struct mmap_stream_list *mmap_list,
1864                 void (*packet_seek)(struct bt_stream_pos *pos, size_t index,
1865                         int whence),
1866                 FILE *metadata_fp)
1867 {
1868         struct ctf_trace *td;
1869         int ret;
1870
1871         if (!metadata_fp) {
1872                 fprintf(stderr, "[error] No metadata file pointer associated, "
1873                                 "required for mmap parsing\n");
1874                 goto error;
1875         }
1876         if (!packet_seek) {
1877                 fprintf(stderr, "[error] packet_seek function undefined.\n");
1878                 goto error;
1879         }
1880         td = g_new0(struct ctf_trace, 1);
1881         ret = ctf_open_mmap_trace_read(td, mmap_list, packet_seek, metadata_fp);
1882         if (ret)
1883                 goto error_free;
1884
1885         return &td->parent;
1886
1887 error_free:
1888         g_free(td);
1889 error:
1890         return NULL;
1891 }
1892
1893 static
1894 int ctf_convert_index_timestamp(struct trace_descriptor *tdp)
1895 {
1896         int i, j, k;
1897         struct ctf_trace *td = container_of(tdp, struct ctf_trace, parent);
1898
1899         /* for each stream_class */
1900         for (i = 0; i < td->streams->len; i++) {
1901                 struct ctf_stream_declaration *stream_class;
1902
1903                 stream_class = g_ptr_array_index(td->streams, i);
1904                 if (!stream_class)
1905                         continue;
1906                 /* for each file_stream */
1907                 for (j = 0; j < stream_class->streams->len; j++) {
1908                         struct ctf_stream_definition *stream;
1909                         struct ctf_stream_pos *stream_pos;
1910                         struct ctf_file_stream *cfs;
1911
1912                         stream = g_ptr_array_index(stream_class->streams, j);
1913                         if (!stream)
1914                                 continue;
1915                         cfs = container_of(stream, struct ctf_file_stream,
1916                                         parent);
1917                         stream_pos = &cfs->pos;
1918                         if (!stream_pos->packet_cycles_index)
1919                                 continue;
1920
1921                         for (k = 0; k < stream_pos->packet_cycles_index->len; k++) {
1922                                 struct packet_index *index;
1923                                 struct packet_index new_index;
1924
1925                                 index = &g_array_index(stream_pos->packet_cycles_index,
1926                                                 struct packet_index, k);
1927                                 memcpy(&new_index, index,
1928                                                 sizeof(struct packet_index));
1929                                 new_index.timestamp_begin =
1930                                         ctf_get_real_timestamp(stream,
1931                                                         index->timestamp_begin);
1932                                 new_index.timestamp_end =
1933                                         ctf_get_real_timestamp(stream,
1934                                                         index->timestamp_end);
1935                                 g_array_append_val(stream_pos->packet_real_index,
1936                                                 new_index);
1937                         }
1938                 }
1939         }
1940         return 0;
1941 }
1942
1943 static
1944 int ctf_close_file_stream(struct ctf_file_stream *file_stream)
1945 {
1946         int ret;
1947
1948         ret = ctf_fini_pos(&file_stream->pos);
1949         if (ret) {
1950                 fprintf(stderr, "Error on ctf_fini_pos\n");
1951                 return -1;
1952         }
1953         ret = close(file_stream->pos.fd);
1954         if (ret) {
1955                 perror("Error closing file fd");
1956                 return -1;
1957         }
1958         return 0;
1959 }
1960
1961 static
1962 int ctf_close_trace(struct trace_descriptor *tdp)
1963 {
1964         struct ctf_trace *td = container_of(tdp, struct ctf_trace, parent);
1965         int ret;
1966
1967         if (td->streams) {
1968                 int i;
1969
1970                 for (i = 0; i < td->streams->len; i++) {
1971                         struct ctf_stream_declaration *stream;
1972                         int j;
1973
1974                         stream = g_ptr_array_index(td->streams, i);
1975                         if (!stream)
1976                                 continue;
1977                         for (j = 0; j < stream->streams->len; j++) {
1978                                 struct ctf_file_stream *file_stream;
1979                                 file_stream = container_of(g_ptr_array_index(stream->streams, j),
1980                                                 struct ctf_file_stream, parent);
1981                                 ret = ctf_close_file_stream(file_stream);
1982                                 if (ret)
1983                                         return ret;
1984                         }
1985                 }
1986         }
1987         ctf_destroy_metadata(td);
1988         ret = close(td->dirfd);
1989         if (ret) {
1990                 perror("Error closing dirfd");
1991                 return ret;
1992         }
1993         ret = closedir(td->dir);
1994         if (ret) {
1995                 perror("Error closedir");
1996                 return ret;
1997         }
1998         g_free(td);
1999         return 0;
2000 }
2001
2002 static
2003 void ctf_set_context(struct trace_descriptor *descriptor,
2004                 struct bt_context *ctx)
2005 {
2006         struct ctf_trace *td = container_of(descriptor, struct ctf_trace,
2007                         parent);
2008
2009         td->ctx = ctx;
2010 }
2011
2012 static
2013 void ctf_set_handle(struct trace_descriptor *descriptor,
2014                 struct bt_trace_handle *handle)
2015 {
2016         struct ctf_trace *td = container_of(descriptor, struct ctf_trace,
2017                         parent);
2018
2019         td->handle = handle;
2020 }
2021
2022 static
2023 void __attribute__((constructor)) ctf_init(void)
2024 {
2025         int ret;
2026
2027         ctf_format.name = g_quark_from_static_string("ctf");
2028         ret = bt_register_format(&ctf_format);
2029         assert(!ret);
2030 }
2031
2032 static
2033 void __attribute__((destructor)) ctf_exit(void)
2034 {
2035         bt_unregister_format(&ctf_format);
2036 }