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
  21 #include <babeltrace/format.h>
  22 #include <babeltrace/ctf/types.h>
  23 #include <babeltrace/ctf/metadata.h>
  24 #include <babeltrace/babeltrace-internal.h>
  25 #include <inttypes.h>
  26 #include <stdio.h>
  27 #include <uuid/uuid.h>
  28 #include <sys/mman.h>
  29 #include <errno.h>
  30 #include <endian.h>
  31 #include <sys/types.h>
  32 #include <sys/stat.h>
  33 #include <fcntl.h>
  34 #include <dirent.h>
  35 #include <glib.h>
  36 #include <unistd.h>
  37 #include <stdlib.h>
  38
  39 #include "metadata/ctf-scanner.h"
  40 #include "metadata/ctf-parser.h"
  41 #include "metadata/ctf-ast.h"
  42
  43 /*
  44  * We currently simply map a page to read the packet header and packet
  45  * context to get the packet length and content length. (in bits)
  46  */
  47 #define MAX_PACKET_HEADER_LEN   (getpagesize() * CHAR_BIT)
  48 #define WRITE_PACKET_LEN        (getpagesize() * 8 * CHAR_BIT)
  49 #define UUID_LEN 16     /* uuid by value len */
  50
  51 #ifndef min
  52 #define min(a, b)       (((a) < (b)) ? (a) : (b))
  53 #endif
  54
  55 extern int yydebug;
  56
  57 static
  58 struct trace_descriptor *ctf_open_trace(const char *path, int flags,
  59                 void (*move_pos_slow)(struct ctf_stream_pos *pos, size_t offset,
  60                         int whence), FILE *metadata_fp);
  61 static
  62 void ctf_close_trace(struct trace_descriptor *descriptor);
  63
  64 static
  65 rw_dispatch read_dispatch_table[] = {
  66         [ CTF_TYPE_INTEGER ] = ctf_integer_read,
  67         [ CTF_TYPE_FLOAT ] = ctf_float_read,
  68         [ CTF_TYPE_ENUM ] = ctf_enum_read,
  69         [ CTF_TYPE_STRING ] = ctf_string_read,
  70         [ CTF_TYPE_STRUCT ] = ctf_struct_rw,
  71         [ CTF_TYPE_VARIANT ] = ctf_variant_rw,
  72         [ CTF_TYPE_ARRAY ] = ctf_array_read,
  73         [ CTF_TYPE_SEQUENCE ] = ctf_sequence_read,
  74 };
  75
  76 static
  77 rw_dispatch write_dispatch_table[] = {
  78         [ CTF_TYPE_INTEGER ] = ctf_integer_write,
  79         [ CTF_TYPE_FLOAT ] = ctf_float_write,
  80         [ CTF_TYPE_ENUM ] = ctf_enum_write,
  81         [ CTF_TYPE_STRING ] = ctf_string_write,
  82         [ CTF_TYPE_STRUCT ] = ctf_struct_rw,
  83         [ CTF_TYPE_VARIANT ] = ctf_variant_rw,
  84         [ CTF_TYPE_ARRAY ] = ctf_array_write,
  85         [ CTF_TYPE_SEQUENCE ] = ctf_sequence_write,
  86 };
  87
  88 static
  89 struct format ctf_format = {
  90         .open_trace = ctf_open_trace,
  91         .close_trace = ctf_close_trace,
  92 };
  93
  94 static
  95 void ctf_update_timestamp(struct ctf_stream *stream,
  96                           struct definition_integer *integer_definition)
  97 {
  98         struct declaration_integer *integer_declaration =
  99                 integer_definition->declaration;
 100         uint64_t oldval, newval, updateval;
 101
 102         if (unlikely(integer_declaration->len == 64)) {
 103                 stream->timestamp = integer_definition->value._unsigned;
 104                 return;
 105         }
 106         /* keep low bits */
 107         oldval = stream->timestamp;
 108         oldval &= (1ULL << integer_declaration->len) - 1;
 109         newval = integer_definition->value._unsigned;
 110         /* Test for overflow by comparing low bits */
 111         if (newval < oldval)
 112                 newval += 1ULL << integer_declaration->len;
 113         /* updateval contains old high bits, and new low bits (sum) */
 114         updateval = stream->timestamp;
 115         updateval &= ~((1ULL << integer_declaration->len) - 1);
 116         updateval += newval;
 117         stream->timestamp = updateval;
 118 }
 119
 120 static
 121 int ctf_read_event(struct stream_pos *ppos, struct ctf_stream *stream)
 122 {
 123         struct ctf_stream_pos *pos =
 124                 container_of(ppos, struct ctf_stream_pos, parent);
 125         struct ctf_stream_class *stream_class = stream->stream_class;
 126         struct ctf_stream_event *event;
 127         uint64_t id = 0;
 128         int ret;
 129
 130         /* We need to check for EOF here for empty files. */
 131         if (unlikely(pos->offset == EOF))
 132                 return EOF;
 133
 134         ctf_pos_get_event(pos);
 135
 136         /*
 137          * This is the EOF check after we've advanced the position in
 138          * ctf_pos_get_event.
 139          */
 140         if (unlikely(pos->offset == EOF))
 141                 return EOF;
 142         assert(pos->offset < pos->content_size);
 143
 144         /* Read event header */
 145         if (likely(stream->stream_event_header)) {
 146                 struct definition_integer *integer_definition;
 147                 struct definition *variant;
 148
 149                 ret = generic_rw(ppos, &stream->stream_event_header->p);
 150                 if (unlikely(ret))
 151                         goto error;
 152                 /* lookup event id */
 153                 integer_definition = lookup_integer(&stream->stream_event_header->p, "id", FALSE);
 154                 if (integer_definition) {
 155                         id = integer_definition->value._unsigned;
 156                 } else {
 157                         struct definition_enum *enum_definition;
 158
 159                         enum_definition = lookup_enum(&stream->stream_event_header->p, "id", FALSE);
 160                         if (enum_definition) {
 161                                 id = enum_definition->integer->value._unsigned;
 162                         }
 163                 }
 164
 165                 variant = lookup_variant(&stream->stream_event_header->p, "v");
 166                 if (variant) {
 167                         integer_definition = lookup_integer(variant, "id", FALSE);
 168                         if (integer_definition) {
 169                                 id = integer_definition->value._unsigned;
 170                         }
 171                 }
 172                 stream->event_id = id;
 173
 174                 /* lookup timestamp */
 175                 stream->has_timestamp = 0;
 176                 integer_definition = lookup_integer(&stream->stream_event_header->p, "timestamp", FALSE);
 177                 if (integer_definition) {
 178                         ctf_update_timestamp(stream, integer_definition);
 179                         stream->has_timestamp = 1;
 180                 } else {
 181                         if (variant) {
 182                                 integer_definition = lookup_integer(variant, "timestamp", FALSE);
 183                                 if (integer_definition) {
 184                                         ctf_update_timestamp(stream, integer_definition);
 185                                         stream->has_timestamp = 1;
 186                                 }
 187                         }
 188                 }
 189         }
 190
 191         /* Read stream-declared event context */
 192         if (stream->stream_event_context) {
 193                 ret = generic_rw(ppos, &stream->stream_event_context->p);
 194                 if (ret)
 195                         goto error;
 196         }
 197
 198         if (unlikely(id >= stream_class->events_by_id->len)) {
 199                 fprintf(stdout, "[error] Event id %" PRIu64 " is outside range.\n", id);
 200                 return -EINVAL;
 201         }
 202         event = g_ptr_array_index(stream->events_by_id, id);
 203         if (unlikely(!event)) {
 204                 fprintf(stdout, "[error] Event id %" PRIu64 " is unknown.\n", id);
 205                 return -EINVAL;
 206         }
 207
 208         /* Read event-declared event context */
 209         if (event->event_context) {
 210                 ret = generic_rw(ppos, &event->event_context->p);
 211                 if (ret)
 212                         goto error;
 213         }
 214
 215         /* Read event payload */
 216         if (likely(event->event_fields)) {
 217                 ret = generic_rw(ppos, &event->event_fields->p);
 218                 if (ret)
 219                         goto error;
 220         }
 221
 222         return 0;
 223
 224 error:
 225         fprintf(stdout, "[error] Unexpected end of stream. Either the trace data stream is corrupted or metadata description does not match data layout.\n");
 226         return ret;
 227 }
 228
 229 static
 230 int ctf_write_event(struct stream_pos *pos, struct ctf_stream *stream)
 231 {
 232         struct ctf_stream_class *stream_class = stream->stream_class;
 233         struct ctf_stream_event *event;
 234         uint64_t id;
 235         int ret;
 236
 237         id = stream->event_id;
 238
 239         /* print event header */
 240         if (likely(stream->stream_event_header)) {
 241                 ret = generic_rw(pos, &stream->stream_event_header->p);
 242                 if (ret)
 243                         goto error;
 244         }
 245
 246         /* print stream-declared event context */
 247         if (stream->stream_event_context) {
 248                 ret = generic_rw(pos, &stream->stream_event_context->p);
 249                 if (ret)
 250                         goto error;
 251         }
 252
 253         if (unlikely(id >= stream_class->events_by_id->len)) {
 254                 fprintf(stdout, "[error] Event id %" PRIu64 " is outside range.\n", id);
 255                 return -EINVAL;
 256         }
 257         event = g_ptr_array_index(stream->events_by_id, id);
 258         if (unlikely(!event)) {
 259                 fprintf(stdout, "[error] Event id %" PRIu64 " is unknown.\n", id);
 260                 return -EINVAL;
 261         }
 262
 263         /* print event-declared event context */
 264         if (event->event_context) {
 265                 ret = generic_rw(pos, &event->event_context->p);
 266                 if (ret)
 267                         goto error;
 268         }
 269
 270         /* Read and print event payload */
 271         if (likely(event->event_fields)) {
 272                 ret = generic_rw(pos, &event->event_fields->p);
 273                 if (ret)
 274                         goto error;
 275         }
 276
 277         return 0;
 278
 279 error:
 280         fprintf(stdout, "[error] Unexpected end of stream. Either the trace data stream is corrupted or metadata description does not match data layout.\n");
 281         return ret;
 282 }
 283
 284 void ctf_init_pos(struct ctf_stream_pos *pos, int fd, int open_flags)
 285 {
 286         pos->fd = fd;
 287         pos->mmap_offset = 0;
 288         pos->packet_size = 0;
 289         pos->content_size = 0;
 290         pos->content_size_loc = NULL;
 291         pos->base = NULL;
 292         pos->offset = 0;
 293         pos->dummy = false;
 294         pos->cur_index = 0;
 295         if (fd >= 0)
 296                 pos->packet_index = g_array_new(FALSE, TRUE,
 297                                                 sizeof(struct packet_index));
 298         else
 299                 pos->packet_index = NULL;
 300         switch (open_flags & O_ACCMODE) {
 301         case O_RDONLY:
 302                 pos->prot = PROT_READ;
 303                 pos->flags = MAP_PRIVATE;
 304                 pos->parent.rw_table = read_dispatch_table;
 305                 pos->parent.event_cb = ctf_read_event;
 306                 break;
 307         case O_RDWR:
 308                 pos->prot = PROT_WRITE; /* Write has priority */
 309                 pos->flags = MAP_SHARED;
 310                 pos->parent.rw_table = write_dispatch_table;
 311                 pos->parent.event_cb = ctf_write_event;
 312                 if (fd >= 0)
 313                         ctf_move_pos_slow(pos, 0, SEEK_SET);    /* position for write */
 314                 break;
 315         default:
 316                 assert(0);
 317         }
 318 }
 319
 320 void ctf_fini_pos(struct ctf_stream_pos *pos)
 321 {
 322         int ret;
 323
 324         if (pos->prot == PROT_WRITE && pos->content_size_loc)
 325                 *pos->content_size_loc = pos->offset;
 326         if (pos->base) {
 327                 /* unmap old base */
 328                 ret = munmap(pos->base, pos->packet_size / CHAR_BIT);
 329                 if (ret) {
 330                         fprintf(stdout, "[error] Unable to unmap old base: %s.\n",
 331                                 strerror(errno));
 332                         assert(0);
 333                 }
 334         }
 335         (void) g_array_free(pos->packet_index, TRUE);
 336 }
 337
 338 void ctf_move_pos_slow(struct ctf_stream_pos *pos, size_t offset, int whence)
 339 {
 340         struct ctf_file_stream *file_stream =
 341                 container_of(pos, struct ctf_file_stream, pos);
 342         int ret;
 343         off_t off;
 344         struct packet_index *index;
 345
 346         if (pos->prot == PROT_WRITE && pos->content_size_loc)
 347                 *pos->content_size_loc = pos->offset;
 348
 349         if (pos->base) {
 350                 /* unmap old base */
 351                 ret = munmap(pos->base, pos->packet_size / CHAR_BIT);
 352                 if (ret) {
 353                         fprintf(stdout, "[error] Unable to unmap old base: %s.\n",
 354                                 strerror(errno));
 355                         assert(0);
 356                 }
 357                 pos->base = NULL;
 358         }
 359
 360         /*
 361          * The caller should never ask for ctf_move_pos across packets,
 362          * except to get exactly at the beginning of the next packet.
 363          */
 364         if (pos->prot == PROT_WRITE) {
 365                 switch (whence) {
 366                 case SEEK_CUR:
 367                         /* The writer will add padding */
 368                         assert(pos->offset + offset == pos->packet_size);
 369                         pos->mmap_offset += WRITE_PACKET_LEN / CHAR_BIT;
 370                         break;
 371                 case SEEK_SET:
 372                         assert(offset == 0);    /* only seek supported for now */
 373                         pos->cur_index = 0;
 374                         break;
 375                 default:
 376                         assert(0);
 377                 }
 378                 pos->content_size = -1U;        /* Unknown at this point */
 379                 pos->packet_size = WRITE_PACKET_LEN;
 380                 off = posix_fallocate(pos->fd, pos->mmap_offset,
 381                                       pos->packet_size / CHAR_BIT);
 382                 assert(off >= 0);
 383                 pos->offset = 0;
 384         } else {
 385         read_next_packet:
 386                 switch (whence) {
 387                 case SEEK_CUR:
 388                         if (pos->offset == EOF)
 389                                 return;
 390                         /* The reader will expect us to skip padding */
 391                         assert(pos->offset + offset == pos->content_size);
 392                         ++pos->cur_index;
 393                         break;
 394                 case SEEK_SET:
 395                         assert(offset == 0);    /* only seek supported for now */
 396                         pos->cur_index = 0;
 397                         break;
 398                 default:
 399                         assert(0);
 400                 }
 401                 if (pos->cur_index >= pos->packet_index->len) {
 402                         pos->offset = EOF;
 403                         return;
 404                 }
 405                 index = &g_array_index(pos->packet_index, struct packet_index,
 406                                        pos->cur_index);
 407                 pos->mmap_offset = index->offset;
 408
 409                 /* Lookup context/packet size in index */
 410                 file_stream->parent.timestamp = index->timestamp_begin;
 411                 pos->content_size = index->content_size;
 412                 pos->packet_size = index->packet_size;
 413                 if (index->data_offset < index->content_size) {
 414                         pos->offset = 0;        /* will read headers */
 415                 } else if (index->data_offset == index->content_size) {
 416                         /* empty packet */
 417                         pos->offset = index->data_offset;
 418                         offset = 0;
 419                         whence = SEEK_CUR;
 420                         goto read_next_packet;
 421                 } else {
 422                         pos->offset = EOF;
 423                         return;
 424                 }
 425         }
 426         /* map new base. Need mapping length from header. */
 427         pos->base = mmap(NULL, pos->packet_size / CHAR_BIT, pos->prot,
 428                          pos->flags, pos->fd, pos->mmap_offset);
 429         if (pos->base == MAP_FAILED) {
 430                 fprintf(stdout, "[error] mmap error %s.\n",
 431                         strerror(errno));
 432                 assert(0);
 433         }
 434
 435         /* update trace_packet_header and stream_packet_context */
 436         if (pos->prot != PROT_WRITE && file_stream->parent.trace_packet_header) {
 437                 /* Read packet header */
 438                 ret = generic_rw(&pos->parent, &file_stream->parent.trace_packet_header->p);
 439                 assert(!ret);
 440         }
 441         if (pos->prot != PROT_WRITE && file_stream->parent.stream_packet_context) {
 442                 /* Read packet context */
 443                 ret = generic_rw(&pos->parent, &file_stream->parent.stream_packet_context->p);
 444                 assert(!ret);
 445         }
 446 }
 447
 448 static
 449 int packet_metadata(struct ctf_trace *td, FILE *fp)
 450 {
 451         uint32_t magic;
 452         size_t len;
 453         int ret = 0;
 454
 455         len = fread(&magic, sizeof(magic), 1, fp);
 456         if (len != 1) {
 457                 goto end;
 458         }
 459         if (magic == TSDL_MAGIC) {
 460                 ret = 1;
 461                 td->byte_order = BYTE_ORDER;
 462                 CTF_TRACE_SET_FIELD(td, byte_order);
 463         } else if (magic == GUINT32_SWAP_LE_BE(TSDL_MAGIC)) {
 464                 ret = 1;
 465                 td->byte_order = (BYTE_ORDER == BIG_ENDIAN) ?
 466                                         LITTLE_ENDIAN : BIG_ENDIAN;
 467                 CTF_TRACE_SET_FIELD(td, byte_order);
 468         }
 469 end:
 470         rewind(fp);
 471         return ret;
 472 }
 473
 474 /*
 475  * Returns 0 on success, -1 on error.
 476  */
 477 static
 478 int check_version(unsigned int major, unsigned int minor)
 479 {
 480         switch (major) {
 481         case 1:
 482                 switch (minor) {
 483                 case 8:
 484                         return 0;
 485                 default:
 486                         goto warning;
 487                 }
 488         default:
 489                 goto warning;
 490
 491         }
 492
 493         /* eventually return an error instead of warning */
 494 warning:
 495         fprintf(stdout, "[warning] Unsupported CTF specification version %u.%u. Trying anyway.\n",
 496                 major, minor);
 497         return 0;
 498 }
 499
 500 static
 501 int ctf_open_trace_metadata_packet_read(struct ctf_trace *td, FILE *in,
 502                                         FILE *out)
 503 {
 504         struct metadata_packet_header header;
 505         size_t readlen, writelen, toread;
 506         char buf[4096 + 1];     /* + 1 for debug-mode \0 */
 507         int ret = 0;
 508
 509         readlen = fread(&header, header_sizeof(header), 1, in);
 510         if (readlen < 1)
 511                 return -EINVAL;
 512
 513         if (td->byte_order != BYTE_ORDER) {
 514                 header.magic = GUINT32_SWAP_LE_BE(header.magic);
 515                 header.checksum = GUINT32_SWAP_LE_BE(header.checksum);
 516                 header.content_size = GUINT32_SWAP_LE_BE(header.content_size);
 517                 header.packet_size = GUINT32_SWAP_LE_BE(header.packet_size);
 518         }
 519         if (header.checksum)
 520                 fprintf(stdout, "[warning] checksum verification not supported yet.\n");
 521         if (header.compression_scheme) {
 522                 fprintf(stdout, "[error] compression (%u) not supported yet.\n",
 523                         header.compression_scheme);
 524                 return -EINVAL;
 525         }
 526         if (header.encryption_scheme) {
 527                 fprintf(stdout, "[error] encryption (%u) not supported yet.\n",
 528                         header.encryption_scheme);
 529                 return -EINVAL;
 530         }
 531         if (header.checksum_scheme) {
 532                 fprintf(stdout, "[error] checksum (%u) not supported yet.\n",
 533                         header.checksum_scheme);
 534                 return -EINVAL;
 535         }
 536         if (check_version(header.major, header.minor) < 0)
 537                 return -EINVAL;
 538         if (!CTF_TRACE_FIELD_IS_SET(td, uuid)) {
 539                 memcpy(td->uuid, header.uuid, sizeof(header.uuid));
 540                 CTF_TRACE_SET_FIELD(td, uuid);
 541         } else {
 542                 if (uuid_compare(header.uuid, td->uuid))
 543                         return -EINVAL;
 544         }
 545
 546         toread = (header.content_size / CHAR_BIT) - header_sizeof(header);
 547
 548         for (;;) {
 549                 readlen = fread(buf, sizeof(char), min(sizeof(buf) - 1, toread), in);
 550                 if (ferror(in)) {
 551                         ret = -EINVAL;
 552                         break;
 553                 }
 554                 if (babeltrace_debug) {
 555                         buf[readlen] = '\0';
 556                         fprintf(stdout, "[debug] metadata packet read: %s\n",
 557                                 buf);
 558                 }
 559
 560                 writelen = fwrite(buf, sizeof(char), readlen, out);
 561                 if (writelen < readlen) {
 562                         ret = -EIO;
 563                         break;
 564                 }
 565                 if (ferror(out)) {
 566                         ret = -EINVAL;
 567                         break;
 568                 }
 569                 toread -= readlen;
 570                 if (!toread) {
 571                         ret = 0;        /* continue reading next packet */
 572                         goto read_padding;
 573                 }
 574         }
 575         return ret;
 576
 577 read_padding:
 578         toread = (header.packet_size - header.content_size) / CHAR_BIT;
 579         ret = fseek(in, toread, SEEK_CUR);
 580         if (ret < 0) {
 581                 fprintf(stdout, "[warning] Missing padding at end of file\n");
 582                 ret = 0;
 583         }
 584         return ret;
 585 }
 586
 587 static
 588 int ctf_open_trace_metadata_stream_read(struct ctf_trace *td, FILE **fp,
 589                                         char **buf)
 590 {
 591         FILE *in, *out;
 592         size_t size;
 593         int ret;
 594
 595         in = *fp;
 596         /*
 597          * Using strlen on *buf instead of size of open_memstream
 598          * because its size includes garbage at the end (after final
 599          * \0). This is the allocated size, not the actual string size.
 600          */
 601         out = open_memstream(buf, &size);
 602         if (out == NULL)
 603                 return -errno;
 604
 605         for (;;) {
 606                 ret = ctf_open_trace_metadata_packet_read(td, in, out);
 607                 if (ret) {
 608                         break;
 609                 }
 610                 if (feof(in)) {
 611                         ret = 0;
 612                         break;
 613                 }
 614         }
 615         fclose(out);    /* flush the buffer */
 616         fclose(in);
 617         /* open for reading */
 618         *fp = fmemopen(*buf, strlen(*buf), "rb");
 619         return 0;
 620 }
 621
 622 static
 623 int ctf_open_trace_metadata_read(struct ctf_trace *td,
 624                 void (*move_pos_slow)(struct ctf_stream_pos *pos, size_t offset,
 625                         int whence), FILE *metadata_fp)
 626 {
 627         struct ctf_scanner *scanner;
 628         struct ctf_file_stream *metadata_stream;
 629         FILE *fp;
 630         char *buf = NULL;
 631         int ret = 0;
 632
 633         metadata_stream = g_new0(struct ctf_file_stream, 1);
 634
 635         if (move_pos_slow) {
 636                 metadata_stream->pos.move_pos_slow = move_pos_slow;
 637         } else {
 638                 fprintf(stderr, "[error] move_pos_slow function undefined.\n");
 639                 ret = -1;
 640                 goto end_stream;
 641         }
 642
 643         if (metadata_fp) {
 644                 fp = metadata_fp;
 645         } else {
 646                 td->metadata = &metadata_stream->parent;
 647                 metadata_stream->pos.fd = openat(td->dirfd, "metadata", O_RDONLY);
 648                 if (metadata_stream->pos.fd < 0) {
 649                         fprintf(stdout, "Unable to open metadata.\n");
 650                         return metadata_stream->pos.fd;
 651                 }
 652
 653                 fp = fdopen(metadata_stream->pos.fd, "r");
 654                 if (!fp) {
 655                         fprintf(stdout, "[error] Unable to open metadata stream.\n");
 656                         ret = -errno;
 657                         goto end_stream;
 658                 }
 659         }
 660         if (babeltrace_debug)
 661                 yydebug = 1;
 662
 663         if (packet_metadata(td, fp)) {
 664                 ret = ctf_open_trace_metadata_stream_read(td, &fp, &buf);
 665                 if (ret)
 666                         goto end_packet_read;
 667         } else {
 668                 unsigned int major, minor;
 669                 ssize_t nr_items;
 670
 671                 td->byte_order = BYTE_ORDER;
 672
 673                 /* Check text-only metadata header and version */
 674                 nr_items = fscanf(fp, "/* CTF %u.%u", &major, &minor);
 675                 if (nr_items < 2)
 676                         fprintf(stdout, "[warning] Ill-shapen or missing \"/* CTF x.y\" header for text-only metadata.\n");
 677                 if (check_version(major, minor) < 0) {
 678                         ret = -EINVAL;
 679                         goto end_packet_read;
 680                 }
 681                 rewind(fp);
 682         }
 683
 684         scanner = ctf_scanner_alloc(fp);
 685         if (!scanner) {
 686                 fprintf(stdout, "[error] Error allocating scanner\n");
 687                 ret = -ENOMEM;
 688                 goto end_scanner_alloc;
 689         }
 690         ret = ctf_scanner_append_ast(scanner);
 691         if (ret) {
 692                 fprintf(stdout, "[error] Error creating AST\n");
 693                 goto end;
 694         }
 695
 696         if (babeltrace_debug) {
 697                 ret = ctf_visitor_print_xml(stdout, 0, &scanner->ast->root);
 698                 if (ret) {
 699                         fprintf(stdout, "[error] Error visiting AST for XML output\n");
 700                         goto end;
 701                 }
 702         }
 703
 704         ret = ctf_visitor_semantic_check(stdout, 0, &scanner->ast->root);
 705         if (ret) {
 706                 fprintf(stdout, "[error] Error in CTF semantic validation %d\n", ret);
 707                 goto end;
 708         }
 709         ret = ctf_visitor_construct_metadata(stdout, 0, &scanner->ast->root,
 710                         td, td->byte_order);
 711         if (ret) {
 712                 fprintf(stdout, "[error] Error in CTF metadata constructor %d\n", ret);
 713                 goto end;
 714         }
 715 end:
 716         ctf_scanner_free(scanner);
 717 end_scanner_alloc:
 718 end_packet_read:
 719         fclose(fp);
 720         free(buf);
 721 end_stream:
 722         close(metadata_stream->pos.fd);
 723         if (ret)
 724                 g_free(metadata_stream);
 725         return ret;
 726 }
 727
 728 static
 729 struct ctf_stream_event *create_event_definitions(struct ctf_trace *td,
 730                                                   struct ctf_stream *stream,
 731                                                   struct ctf_event *event)
 732 {
 733         struct ctf_stream_event *stream_event = g_new0(struct ctf_stream_event, 1);
 734
 735         if (event->context_decl) {
 736                 struct definition *definition =
 737                         event->context_decl->p.definition_new(&event->context_decl->p,
 738                                 stream->parent_def_scope, 0, 0, "event.context");
 739                 if (!definition) {
 740                         goto error;
 741                 }
 742                 stream_event->event_context = container_of(definition,
 743                                         struct definition_struct, p);
 744                 stream->parent_def_scope = stream_event->event_context->p.scope;
 745         }
 746         if (event->fields_decl) {
 747                 struct definition *definition =
 748                         event->fields_decl->p.definition_new(&event->fields_decl->p,
 749                                 stream->parent_def_scope, 0, 0, "event.fields");
 750                 if (!definition) {
 751                         goto error;
 752                 }
 753                 stream_event->event_fields = container_of(definition,
 754                                         struct definition_struct, p);
 755                 stream->parent_def_scope = stream_event->event_fields->p.scope;
 756         }
 757         return stream_event;
 758
 759 error:
 760         if (stream_event->event_fields)
 761                 definition_unref(&stream_event->event_fields->p);
 762         if (stream_event->event_context)
 763                 definition_unref(&stream_event->event_context->p);
 764         return NULL;
 765 }
 766
 767 static
 768 int create_stream_definitions(struct ctf_trace *td, struct ctf_stream *stream)
 769 {
 770         struct ctf_stream_class *stream_class;
 771         int ret;
 772         int i;
 773
 774         if (stream->stream_definitions_created)
 775                 return 0;
 776
 777         stream_class = stream->stream_class;
 778
 779         if (stream_class->packet_context_decl) {
 780                 struct definition *definition =
 781                         stream_class->packet_context_decl->p.definition_new(&stream_class->packet_context_decl->p,
 782                                 stream->parent_def_scope, 0, 0, "stream.packet.context");
 783                 if (!definition) {
 784                         ret = -EINVAL;
 785                         goto error;
 786                 }
 787                 stream->stream_packet_context = container_of(definition,
 788                                                 struct definition_struct, p);
 789                 stream->parent_def_scope = stream->stream_packet_context->p.scope;
 790         }
 791         if (stream_class->event_header_decl) {
 792                 struct definition *definition =
 793                         stream_class->event_header_decl->p.definition_new(&stream_class->event_header_decl->p,
 794                                 stream->parent_def_scope, 0, 0, "stream.event.header");
 795                 if (!definition) {
 796                         ret = -EINVAL;
 797                         goto error;
 798                 }
 799                 stream->stream_event_header =
 800                         container_of(definition, struct definition_struct, p);
 801                 stream->parent_def_scope = stream->stream_event_header->p.scope;
 802         }
 803         if (stream_class->event_context_decl) {
 804                 struct definition *definition =
 805                         stream_class->event_context_decl->p.definition_new(&stream_class->event_context_decl->p,
 806                                 stream->parent_def_scope, 0, 0, "stream.event.context");
 807                 if (!definition) {
 808                         ret = -EINVAL;
 809                         goto error;
 810                 }
 811                 stream->stream_event_context =
 812                         container_of(definition, struct definition_struct, p);
 813                 stream->parent_def_scope = stream->stream_event_context->p.scope;
 814         }
 815         stream->events_by_id = g_ptr_array_new();
 816         g_ptr_array_set_size(stream->events_by_id, stream_class->events_by_id->len);
 817         for (i = 0; i < stream->events_by_id->len; i++) {
 818                 struct ctf_event *event = g_ptr_array_index(stream_class->events_by_id, i);
 819                 struct ctf_stream_event *stream_event;
 820
 821                 if (!event)
 822                         continue;
 823                 stream_event = create_event_definitions(td, stream, event);
 824                 if (!stream_event)
 825                         goto error_event;
 826                 g_ptr_array_index(stream->events_by_id, i) = stream_event;
 827         }
 828         return 0;
 829
 830 error_event:
 831         for (i = 0; i < stream->events_by_id->len; i++) {
 832                 struct ctf_stream_event *stream_event = g_ptr_array_index(stream->events_by_id, i);
 833                 if (stream_event)
 834                         g_free(stream_event);
 835         }
 836         g_ptr_array_free(stream->events_by_id, TRUE);
 837 error:
 838         if (stream->stream_event_context)
 839                 definition_unref(&stream->stream_event_context->p);
 840         if (stream->stream_event_header)
 841                 definition_unref(&stream->stream_event_header->p);
 842         if (stream->stream_packet_context)
 843                 definition_unref(&stream->stream_packet_context->p);
 844         return ret;
 845 }
 846
 847
 848 static
 849 int create_stream_packet_index(struct ctf_trace *td,
 850                                struct ctf_file_stream *file_stream)
 851 {
 852         struct ctf_stream_class *stream;
 853         int len_index;
 854         struct ctf_stream_pos *pos;
 855         struct stat filestats;
 856         struct packet_index packet_index;
 857         int first_packet = 1;
 858         int ret;
 859
 860         pos = &file_stream->pos;
 861
 862         ret = fstat(pos->fd, &filestats);
 863         if (ret < 0)
 864                 return ret;
 865
 866         if (filestats.st_size < MAX_PACKET_HEADER_LEN / CHAR_BIT)
 867                 return -EINVAL;
 868
 869         for (pos->mmap_offset = 0; pos->mmap_offset < filestats.st_size; ) {
 870                 uint64_t stream_id = 0;
 871
 872                 if (pos->base) {
 873                         /* unmap old base */
 874                         ret = munmap(pos->base, pos->packet_size / CHAR_BIT);
 875                         if (ret) {
 876                                 fprintf(stdout, "[error] Unable to unmap old base: %s.\n",
 877                                         strerror(errno));
 878                                 return ret;
 879                         }
 880                         pos->base = NULL;
 881                 }
 882                 /* map new base. Need mapping length from header. */
 883                 pos->base = mmap(NULL, MAX_PACKET_HEADER_LEN / CHAR_BIT, PROT_READ,
 884                                  MAP_PRIVATE, pos->fd, pos->mmap_offset);
 885                 pos->content_size = MAX_PACKET_HEADER_LEN;      /* Unknown at this point */
 886                 pos->packet_size = MAX_PACKET_HEADER_LEN;       /* Unknown at this point */
 887                 pos->offset = 0;        /* Position of the packet header */
 888
 889                 packet_index.offset = pos->mmap_offset;
 890                 packet_index.content_size = 0;
 891                 packet_index.packet_size = 0;
 892                 packet_index.timestamp_begin = 0;
 893                 packet_index.timestamp_end = 0;
 894
 895                 /* read and check header, set stream id (and check) */
 896                 if (file_stream->parent.trace_packet_header) {
 897                         /* Read packet header */
 898                         ret = generic_rw(&pos->parent, &file_stream->parent.trace_packet_header->p);
 899                         if (ret)
 900                                 return ret;
 901                         len_index = struct_declaration_lookup_field_index(file_stream->parent.trace_packet_header->declaration, g_quark_from_static_string("magic"));
 902                         if (len_index >= 0) {
 903                                 struct definition_integer *defint;
 904                                 struct definition *field;
 905
 906                                 field = struct_definition_get_field_from_index(file_stream->parent.trace_packet_header, len_index);
 907                                 assert(field->declaration->id == CTF_TYPE_INTEGER);
 908                                 defint = container_of(field, struct definition_integer, p);
 909                                 assert(defint->declaration->signedness == FALSE);
 910                                 if (defint->value._unsigned != CTF_MAGIC) {
 911                                         fprintf(stdout, "[error] Invalid magic number 0x%" PRIX64 " at packet %u (file offset %zd).\n",
 912                                                         defint->value._unsigned,
 913                                                         file_stream->pos.packet_index->len,
 914                                                         (ssize_t) pos->mmap_offset);
 915                                         return -EINVAL;
 916                                 }
 917                         }
 918
 919                         /* check uuid */
 920                         len_index = struct_declaration_lookup_field_index(file_stream->parent.trace_packet_header->declaration, g_quark_from_static_string("uuid"));
 921                         if (len_index >= 0) {
 922                                 struct definition_array *defarray;
 923                                 struct definition *field;
 924                                 uint64_t i;
 925                                 uint8_t uuidval[UUID_LEN];
 926
 927                                 field = struct_definition_get_field_from_index(file_stream->parent.trace_packet_header, len_index);
 928                                 assert(field->declaration->id == CTF_TYPE_ARRAY);
 929                                 defarray = container_of(field, struct definition_array, p);
 930                                 assert(array_len(defarray) == UUID_LEN);
 931                                 assert(defarray->declaration->elem->id == CTF_TYPE_INTEGER);
 932
 933                                 for (i = 0; i < UUID_LEN; i++) {
 934                                         struct definition *elem;
 935                                         struct definition_integer *defint;
 936
 937                                         elem = array_index(defarray, i);
 938                                         assert(elem);
 939                                         defint = container_of(elem, struct definition_integer, p);
 940                                         uuidval[i] = defint->value._unsigned;
 941                                 }
 942                                 ret = uuid_compare(td->uuid, uuidval);
 943                                 if (ret) {
 944                                         fprintf(stdout, "[error] Unique Universal Identifiers do not match.\n");
 945                                         return -EINVAL;
 946                                 }
 947                         }
 948
 949
 950                         len_index = struct_declaration_lookup_field_index(file_stream->parent.trace_packet_header->declaration, g_quark_from_static_string("stream_id"));
 951                         if (len_index >= 0) {
 952                                 struct definition_integer *defint;
 953                                 struct definition *field;
 954
 955                                 field = struct_definition_get_field_from_index(file_stream->parent.trace_packet_header, len_index);
 956                                 assert(field->declaration->id == CTF_TYPE_INTEGER);
 957                                 defint = container_of(field, struct definition_integer, p);
 958                                 assert(defint->declaration->signedness == FALSE);
 959                                 stream_id = defint->value._unsigned;
 960                         }
 961                 }
 962
 963                 if (!first_packet && file_stream->parent.stream_id != stream_id) {
 964                         fprintf(stdout, "[error] Stream ID is changing within a stream.\n");
 965                         return -EINVAL;
 966                 }
 967                 if (first_packet) {
 968                         file_stream->parent.stream_id = stream_id;
 969                         if (stream_id >= td->streams->len) {
 970                                 fprintf(stdout, "[error] Stream %" PRIu64 " is not declared in metadata.\n", stream_id);
 971                                 return -EINVAL;
 972                         }
 973                         stream = g_ptr_array_index(td->streams, stream_id);
 974                         if (!stream) {
 975                                 fprintf(stdout, "[error] Stream %" PRIu64 " is not declared in metadata.\n", stream_id);
 976                                 return -EINVAL;
 977                         }
 978                         file_stream->parent.stream_class = stream;
 979                         ret = create_stream_definitions(td, &file_stream->parent);
 980                         if (ret)
 981                                 return ret;
 982                 }
 983                 first_packet = 0;
 984
 985                 if (file_stream->parent.stream_packet_context) {
 986                         /* Read packet context */
 987                         ret = generic_rw(&pos->parent, &file_stream->parent.stream_packet_context->p);
 988                         if (ret)
 989                                 return ret;
 990                         /* read content size from header */
 991                         len_index = struct_declaration_lookup_field_index(file_stream->parent.stream_packet_context->declaration, g_quark_from_static_string("content_size"));
 992                         if (len_index >= 0) {
 993                                 struct definition_integer *defint;
 994                                 struct definition *field;
 995
 996                                 field = struct_definition_get_field_from_index(file_stream->parent.stream_packet_context, len_index);
 997                                 assert(field->declaration->id == CTF_TYPE_INTEGER);
 998                                 defint = container_of(field, struct definition_integer, p);
 999                                 assert(defint->declaration->signedness == FALSE);
1000                                 packet_index.content_size = defint->value._unsigned;
1001                         } else {
1002                                 /* Use file size for packet size */
1003                                 packet_index.content_size = filestats.st_size * CHAR_BIT;
1004                         }
1005
1006                         /* read packet size from header */
1007                         len_index = struct_declaration_lookup_field_index(file_stream->parent.stream_packet_context->declaration, g_quark_from_static_string("packet_size"));
1008                         if (len_index >= 0) {
1009                                 struct definition_integer *defint;
1010                                 struct definition *field;
1011
1012                                 field = struct_definition_get_field_from_index(file_stream->parent.stream_packet_context, len_index);
1013                                 assert(field->declaration->id == CTF_TYPE_INTEGER);
1014                                 defint = container_of(field, struct definition_integer, p);
1015                                 assert(defint->declaration->signedness == FALSE);
1016                                 packet_index.packet_size = defint->value._unsigned;
1017                         } else {
1018                                 /* Use content size if non-zero, else file size */
1019                                 packet_index.packet_size = packet_index.content_size ? : filestats.st_size * CHAR_BIT;
1020                         }
1021
1022                         /* read timestamp begin from header */
1023                         len_index = struct_declaration_lookup_field_index(file_stream->parent.stream_packet_context->declaration, g_quark_from_static_string("timestamp_begin"));
1024                         if (len_index >= 0) {
1025                                 struct definition_integer *defint;
1026                                 struct definition *field;
1027
1028                                 field = struct_definition_get_field_from_index(file_stream->parent.stream_packet_context, len_index);
1029                                 assert(field->declaration->id == CTF_TYPE_INTEGER);
1030                                 defint = container_of(field, struct definition_integer, p);
1031                                 assert(defint->declaration->signedness == FALSE);
1032                                 packet_index.timestamp_begin = defint->value._unsigned;
1033                         }
1034
1035                         /* read timestamp end from header */
1036                         len_index = struct_declaration_lookup_field_index(file_stream->parent.stream_packet_context->declaration, g_quark_from_static_string("timestamp_end"));
1037                         if (len_index >= 0) {
1038                                 struct definition_integer *defint;
1039                                 struct definition *field;
1040
1041                                 field = struct_definition_get_field_from_index(file_stream->parent.stream_packet_context, len_index);
1042                                 assert(field->declaration->id == CTF_TYPE_INTEGER);
1043                                 defint = container_of(field, struct definition_integer, p);
1044                                 assert(defint->declaration->signedness == FALSE);
1045                                 packet_index.timestamp_end = defint->value._unsigned;
1046                         }
1047                 } else {
1048                         /* Use file size for packet size */
1049                         packet_index.content_size = filestats.st_size * CHAR_BIT;
1050                         /* Use content size if non-zero, else file size */
1051                         packet_index.packet_size = packet_index.content_size ? : filestats.st_size * CHAR_BIT;
1052                 }
1053
1054                 /* Validate content size and packet size values */
1055                 if (packet_index.content_size > packet_index.packet_size) {
1056                         fprintf(stdout, "[error] Content size (%zu bits) is larger than packet size (%zu bits).\n",
1057                                 packet_index.content_size, packet_index.packet_size);
1058                         return -EINVAL;
1059                 }
1060
1061                 if (packet_index.packet_size > (filestats.st_size - packet_index.offset) * CHAR_BIT) {
1062                         fprintf(stdout, "[error] Packet size (%zu bits) is larger than remaining file size (%zu bits).\n",
1063                                 packet_index.content_size, (size_t) (filestats.st_size - packet_index.offset) * CHAR_BIT);
1064                         return -EINVAL;
1065                 }
1066
1067                 /* Save position after header and context */
1068                 packet_index.data_offset = pos->offset;
1069
1070                 /* add index to packet array */
1071                 g_array_append_val(file_stream->pos.packet_index, packet_index);
1072
1073                 pos->mmap_offset += packet_index.packet_size / CHAR_BIT;
1074         }
1075
1076         /* Move pos back to beginning of file */
1077         ctf_move_pos_slow(pos, 0, SEEK_SET);    /* position for write */
1078
1079         return 0;
1080 }
1081
1082 static
1083 int create_trace_definitions(struct ctf_trace *td, struct ctf_stream *stream)
1084 {
1085         int ret;
1086
1087         if (td->packet_header_decl) {
1088                 struct definition *definition =
1089                         td->packet_header_decl->p.definition_new(&td->packet_header_decl->p,
1090                                 stream->parent_def_scope, 0, 0, "trace.packet.header");
1091                 if (!definition) {
1092                         ret = -EINVAL;
1093                         goto error;
1094                 }
1095                 stream->trace_packet_header =
1096                         container_of(definition, struct definition_struct, p);
1097                 stream->parent_def_scope = stream->trace_packet_header->p.scope;
1098         }
1099
1100         return 0;
1101
1102 error:
1103         return ret;
1104 }
1105
1106 /*
1107  * Note: many file streams can inherit from the same stream class
1108  * description (metadata).
1109  */
1110 static
1111 int ctf_open_file_stream_read(struct ctf_trace *td, const char *path, int flags,
1112                 void (*move_pos_slow)(struct ctf_stream_pos *pos, size_t offset,
1113                         int whence))
1114 {
1115         int ret;
1116         struct ctf_file_stream *file_stream;
1117
1118         ret = openat(td->dirfd, path, flags);
1119         if (ret < 0)
1120                 goto error;
1121         file_stream = g_new0(struct ctf_file_stream, 1);
1122
1123         if (move_pos_slow) {
1124                 file_stream->pos.move_pos_slow = move_pos_slow;
1125         } else {
1126                 fprintf(stderr, "[error] move_pos_slow function undefined.\n");
1127                 ret = -1;
1128                 goto error_def;
1129         }
1130
1131         ctf_init_pos(&file_stream->pos, ret, flags);
1132         ret = create_trace_definitions(td, &file_stream->parent);
1133         if (ret)
1134                 goto error_def;
1135         ret = create_stream_packet_index(td, file_stream);
1136         if (ret)
1137                 goto error_index;
1138         /* Add stream file to stream class */
1139         g_ptr_array_add(file_stream->parent.stream_class->streams,
1140                         &file_stream->parent);
1141         return 0;
1142
1143 error_index:
1144         if (file_stream->parent.trace_packet_header)
1145                 definition_unref(&file_stream->parent.trace_packet_header->p);
1146 error_def:
1147         ctf_fini_pos(&file_stream->pos);
1148         close(file_stream->pos.fd);
1149         g_free(file_stream);
1150 error:
1151         return ret;
1152 }
1153
1154 static
1155 int ctf_open_trace_read(struct ctf_trace *td, const char *path, int flags,
1156                 void (*move_pos_slow)(struct ctf_stream_pos *pos, size_t offset,
1157                         int whence), FILE *metadata_fp)
1158 {
1159         int ret;
1160         struct dirent *dirent;
1161         struct dirent *diriter;
1162         size_t dirent_len;
1163
1164         td->flags = flags;
1165
1166         /* Open trace directory */
1167         td->dir = opendir(path);
1168         if (!td->dir) {
1169                 fprintf(stdout, "[error] Unable to open trace directory.\n");
1170                 ret = -ENOENT;
1171                 goto error;
1172         }
1173
1174         td->dirfd = open(path, 0);
1175         if (td->dirfd < 0) {
1176                 fprintf(stdout, "[error] Unable to open trace directory file descriptor.\n");
1177                 ret = -ENOENT;
1178                 goto error_dirfd;
1179         }
1180
1181         /*
1182          * Keep the metadata file separate.
1183          */
1184
1185         ret = ctf_open_trace_metadata_read(td, move_pos_slow, metadata_fp);
1186         if (ret) {
1187                 goto error_metadata;
1188         }
1189
1190         /*
1191          * Open each stream: for each file, try to open, check magic
1192          * number, and get the stream ID to add to the right location in
1193          * the stream array.
1194          */
1195
1196         dirent_len = offsetof(struct dirent, d_name) +
1197                         fpathconf(td->dirfd, _PC_NAME_MAX) + 1;
1198
1199         dirent = malloc(dirent_len);
1200
1201         for (;;) {
1202                 ret = readdir_r(td->dir, dirent, &diriter);
1203                 if (ret) {
1204                         fprintf(stdout, "[error] Readdir error.\n");
1205                         goto readdir_error;
1206                 }
1207                 if (!diriter)
1208                         break;
1209                 /* Ignore hidden files, ., .. and metadata. */
1210                 if (!strncmp(diriter->d_name, ".", 1)
1211                                 || !strcmp(diriter->d_name, "..")
1212                                 || !strcmp(diriter->d_name, "metadata"))
1213                         continue;
1214                 ret = ctf_open_file_stream_read(td, diriter->d_name, flags, move_pos_slow);
1215                 if (ret) {
1216                         fprintf(stdout, "[error] Open file stream error.\n");
1217                         goto readdir_error;
1218                 }
1219         }
1220
1221         free(dirent);
1222         return 0;
1223
1224 readdir_error:
1225         free(dirent);
1226 error_metadata:
1227         close(td->dirfd);
1228 error_dirfd:
1229         closedir(td->dir);
1230 error:
1231         return ret;
1232 }
1233
1234 static
1235 struct trace_descriptor *ctf_open_trace(const char *path, int flags,
1236                 void (*move_pos_slow)(struct ctf_stream_pos *pos, size_t offset,
1237                         int whence), FILE *metadata_fp)
1238 {
1239         struct ctf_trace *td;
1240         int ret;
1241
1242         td = g_new0(struct ctf_trace, 1);
1243
1244         switch (flags & O_ACCMODE) {
1245         case O_RDONLY:
1246                 if (!path) {
1247                         fprintf(stdout, "[error] Path missing for input CTF trace.\n");
1248                         goto error;
1249                 }
1250                 ret = ctf_open_trace_read(td, path, flags, move_pos_slow, metadata_fp);
1251                 if (ret)
1252                         goto error;
1253                 break;
1254         case O_RDWR:
1255                 fprintf(stdout, "[error] Opening CTF traces for output is not supported yet.\n");
1256                 goto error;
1257         default:
1258                 fprintf(stdout, "[error] Incorrect open flags.\n");
1259                 goto error;
1260         }
1261
1262         return &td->parent;
1263 error:
1264         g_free(td);
1265         return NULL;
1266 }
1267
1268 static
1269 void ctf_close_file_stream(struct ctf_file_stream *file_stream)
1270 {
1271         ctf_fini_pos(&file_stream->pos);
1272         close(file_stream->pos.fd);
1273 }
1274
1275 static
1276 void ctf_close_trace(struct trace_descriptor *tdp)
1277 {
1278         struct ctf_trace *td = container_of(tdp, struct ctf_trace, parent);
1279         int i;
1280
1281         if (td->streams) {
1282                 for (i = 0; i < td->streams->len; i++) {
1283                         struct ctf_stream_class *stream;
1284                         int j;
1285
1286                         stream = g_ptr_array_index(td->streams, i);
1287                         if (!stream)
1288                                 continue;
1289                         for (j = 0; j < stream->streams->len; j++) {
1290                                 struct ctf_file_stream *file_stream;
1291                                 file_stream = container_of(g_ptr_array_index(stream->streams, j), struct ctf_file_stream, parent);
1292                                 ctf_close_file_stream(file_stream);
1293                         }
1294
1295                 }
1296                 g_ptr_array_free(td->streams, TRUE);
1297         }
1298         closedir(td->dir);
1299         g_free(td);
1300 }
1301
1302 void __attribute__((constructor)) ctf_init(void)
1303 {
1304         int ret;
1305
1306         ctf_format.name = g_quark_from_static_string("ctf");
1307         ret = bt_register_format(&ctf_format);
1308         assert(!ret);
1309 }
1310
1311 /* TODO: finalize */