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