formats/ctf-text/ctf-text.c

   1 /*
   2  * BabelTrace - Common Trace Format (CTF)
   3  *
   4  * CTF Text 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-text/types.h>
  23 #include <babeltrace/ctf/metadata.h>
  24 #include <babeltrace/babeltrace-internal.h>
  25 #include <babeltrace/ctf/events-internal.h>
  26 #include <inttypes.h>
  27 #include <sys/mman.h>
  28 #include <errno.h>
  29 #include <sys/types.h>
  30 #include <sys/stat.h>
  31 #include <fcntl.h>
  32 #include <dirent.h>
  33 #include <glib.h>
  34 #include <unistd.h>
  35 #include <stdlib.h>
  36
  37 #define NSEC_PER_SEC 1000000000ULL
  38
  39 int opt_all_field_names,
  40         opt_scope_field_names,
  41         opt_header_field_names,
  42         opt_context_field_names,
  43         opt_payload_field_names,
  44         opt_all_fields,
  45         opt_trace_field,
  46         opt_trace_domain_field,
  47         opt_trace_procname_field,
  48         opt_trace_vpid_field,
  49         opt_trace_hostname_field,
  50         opt_trace_default_fields = 1,
  51         opt_loglevel_field,
  52         opt_emf_field,
  53         opt_callsite_field,
  54         opt_delta_field = 1;
  55
  56 enum field_item {
  57         ITEM_SCOPE,
  58         ITEM_HEADER,
  59         ITEM_CONTEXT,
  60         ITEM_PAYLOAD,
  61 };
  62
  63 enum bt_loglevel {
  64         BT_LOGLEVEL_EMERG                  = 0,
  65         BT_LOGLEVEL_ALERT                  = 1,
  66         BT_LOGLEVEL_CRIT                   = 2,
  67         BT_LOGLEVEL_ERR                    = 3,
  68         BT_LOGLEVEL_WARNING                = 4,
  69         BT_LOGLEVEL_NOTICE                 = 5,
  70         BT_LOGLEVEL_INFO                   = 6,
  71         BT_LOGLEVEL_DEBUG_SYSTEM           = 7,
  72         BT_LOGLEVEL_DEBUG_PROGRAM          = 8,
  73         BT_LOGLEVEL_DEBUG_PROCESS          = 9,
  74         BT_LOGLEVEL_DEBUG_MODULE           = 10,
  75         BT_LOGLEVEL_DEBUG_UNIT             = 11,
  76         BT_LOGLEVEL_DEBUG_FUNCTION         = 12,
  77         BT_LOGLEVEL_DEBUG_LINE             = 13,
  78         BT_LOGLEVEL_DEBUG                  = 14,
  79 };
  80
  81
  82 struct trace_descriptor *ctf_text_open_trace(const char *path, int flags,
  83                 void (*packet_seek)(struct stream_pos *pos, size_t index,
  84                         int whence), FILE *metadata_fp);
  85 void ctf_text_close_trace(struct trace_descriptor *descriptor);
  86
  87 static
  88 rw_dispatch write_dispatch_table[] = {
  89         [ CTF_TYPE_INTEGER ] = ctf_text_integer_write,
  90         [ CTF_TYPE_FLOAT ] = ctf_text_float_write,
  91         [ CTF_TYPE_ENUM ] = ctf_text_enum_write,
  92         [ CTF_TYPE_STRING ] = ctf_text_string_write,
  93         [ CTF_TYPE_STRUCT ] = ctf_text_struct_write,
  94         [ CTF_TYPE_VARIANT ] = ctf_text_variant_write,
  95         [ CTF_TYPE_ARRAY ] = ctf_text_array_write,
  96         [ CTF_TYPE_SEQUENCE ] = ctf_text_sequence_write,
  97 };
  98
  99 static
 100 struct format ctf_text_format = {
 101         .open_trace = ctf_text_open_trace,
 102         .close_trace = ctf_text_close_trace,
 103 };
 104
 105 static GQuark Q_STREAM_PACKET_CONTEXT_TIMESTAMP_BEGIN,
 106         Q_STREAM_PACKET_CONTEXT_TIMESTAMP_END,
 107         Q_STREAM_PACKET_CONTEXT_EVENTS_DISCARDED,
 108         Q_STREAM_PACKET_CONTEXT_CONTENT_SIZE,
 109         Q_STREAM_PACKET_CONTEXT_PACKET_SIZE;
 110
 111 static
 112 void __attribute__((constructor)) init_quarks(void)
 113 {
 114         Q_STREAM_PACKET_CONTEXT_TIMESTAMP_BEGIN = g_quark_from_static_string("stream.packet.context.timestamp_begin");
 115         Q_STREAM_PACKET_CONTEXT_TIMESTAMP_END = g_quark_from_static_string("stream.packet.context.timestamp_end");
 116         Q_STREAM_PACKET_CONTEXT_EVENTS_DISCARDED = g_quark_from_static_string("stream.packet.context.events_discarded");
 117         Q_STREAM_PACKET_CONTEXT_CONTENT_SIZE = g_quark_from_static_string("stream.packet.context.content_size");
 118         Q_STREAM_PACKET_CONTEXT_PACKET_SIZE = g_quark_from_static_string("stream.packet.context.packet_size");
 119 }
 120
 121 static
 122 struct ctf_callsite_dups *ctf_trace_callsite_lookup(struct ctf_trace *trace,
 123                         GQuark callsite_name)
 124 {
 125         return g_hash_table_lookup(trace->callsites,
 126                         (gpointer) (unsigned long) callsite_name);
 127 }
 128
 129 int print_field(struct definition *definition)
 130 {
 131         /* Print all fields in verbose mode */
 132         if (babeltrace_verbose)
 133                 return 1;
 134
 135         /* Filter out part of the packet context */
 136         if (definition->path == Q_STREAM_PACKET_CONTEXT_TIMESTAMP_BEGIN)
 137                 return 0;
 138         if (definition->path == Q_STREAM_PACKET_CONTEXT_TIMESTAMP_END)
 139                 return 0;
 140         if (definition->path == Q_STREAM_PACKET_CONTEXT_EVENTS_DISCARDED)
 141                 return 0;
 142         if (definition->path == Q_STREAM_PACKET_CONTEXT_CONTENT_SIZE)
 143                 return 0;
 144         if (definition->path == Q_STREAM_PACKET_CONTEXT_PACKET_SIZE)
 145                 return 0;
 146
 147         return 1;
 148 }
 149
 150 static
 151 void set_field_names_print(struct ctf_text_stream_pos *pos, enum field_item item)
 152 {
 153         switch (item) {
 154         case ITEM_SCOPE:
 155                 if (opt_all_field_names || opt_scope_field_names)
 156                         pos->print_names = 1;
 157                 else
 158                         pos->print_names = 0;
 159                 break;
 160         case ITEM_HEADER:
 161                 if (opt_all_field_names || opt_header_field_names)
 162                         pos->print_names = 1;
 163                 else
 164                         pos->print_names = 0;
 165                 break;
 166         case ITEM_CONTEXT:
 167                 if (opt_all_field_names || opt_context_field_names)
 168                         pos->print_names = 1;
 169                 else
 170                         pos->print_names = 0;
 171                 break;
 172         case ITEM_PAYLOAD:
 173                 if (opt_all_field_names || opt_payload_field_names)
 174                         pos->print_names = 1;
 175                 else
 176                         pos->print_names = 0;
 177
 178                 break;
 179         default:
 180                 assert(0);
 181         }
 182 }
 183
 184 static
 185 const char *print_loglevel(int value)
 186 {
 187         switch (value) {
 188         case -1:
 189                 return "";
 190         case BT_LOGLEVEL_EMERG:
 191                 return "TRACE_EMERG";
 192         case BT_LOGLEVEL_ALERT:
 193                 return "TRACE_ALERT";
 194         case BT_LOGLEVEL_CRIT:
 195                 return "TRACE_CRIT";
 196         case BT_LOGLEVEL_ERR:
 197                 return "TRACE_ERR";
 198         case BT_LOGLEVEL_WARNING:
 199                 return "TRACE_WARNING";
 200         case BT_LOGLEVEL_NOTICE:
 201                 return "TRACE_NOTICE";
 202         case BT_LOGLEVEL_INFO:
 203                 return "TRACE_INFO";
 204         case BT_LOGLEVEL_DEBUG_SYSTEM:
 205                 return "TRACE_DEBUG_SYSTEM";
 206         case BT_LOGLEVEL_DEBUG_PROGRAM:
 207                 return "TRACE_DEBUG_PROGRAM";
 208         case BT_LOGLEVEL_DEBUG_PROCESS:
 209                 return "TRACE_DEBUG_PROCESS";
 210         case BT_LOGLEVEL_DEBUG_MODULE:
 211                 return "TRACE_DEBUG_MODULE";
 212         case BT_LOGLEVEL_DEBUG_UNIT:
 213                 return "TRACE_DEBUG_UNIT";
 214         case BT_LOGLEVEL_DEBUG_FUNCTION:
 215                 return "TRACE_DEBUG_FUNCTION";
 216         case BT_LOGLEVEL_DEBUG_LINE:
 217                 return "TRACE_DEBUG_LINE";
 218         case BT_LOGLEVEL_DEBUG:
 219                 return "TRACE_DEBUG";
 220         default:
 221                 return "<<UNKNOWN>>";
 222         }
 223 }
 224
 225 static
 226 int ctf_text_write_event(struct stream_pos *ppos, struct ctf_stream_definition *stream)
 227
 228 {
 229         struct ctf_text_stream_pos *pos =
 230                 container_of(ppos, struct ctf_text_stream_pos, parent);
 231         struct ctf_stream_declaration *stream_class = stream->stream_class;
 232         int field_nr_saved;
 233         struct ctf_event_declaration *event_class;
 234         struct ctf_event_definition *event;
 235         uint64_t id;
 236         int ret;
 237         int dom_print = 0;
 238
 239         id = stream->event_id;
 240
 241         if (id >= stream_class->events_by_id->len) {
 242                 fprintf(stderr, "[error] Event id %" PRIu64 " is outside range.\n", id);
 243                 return -EINVAL;
 244         }
 245         event = g_ptr_array_index(stream->events_by_id, id);
 246         if (!event) {
 247                 fprintf(stderr, "[error] Event id %" PRIu64 " is unknown.\n", id);
 248                 return -EINVAL;
 249         }
 250         event_class = g_ptr_array_index(stream_class->events_by_id, id);
 251         if (!event_class) {
 252                 fprintf(stderr, "[error] Event class id %" PRIu64 " is unknown.\n", id);
 253                 return -EINVAL;
 254         }
 255
 256         /* Print events discarded */
 257         if (stream->events_discarded) {
 258                 fflush(pos->fp);
 259                 fprintf(stderr, "[warning] Tracer discarded %" PRIu64 " events between [",
 260                         stream->events_discarded);
 261                 if (opt_clock_cycles) {
 262                         ctf_print_timestamp(stderr, stream,
 263                                         stream->prev_cycles_timestamp);
 264                         fprintf(stderr, "] and [");
 265                         ctf_print_timestamp(stderr, stream,
 266                                         stream->prev_cycles_timestamp_end);
 267                 } else {
 268                         ctf_print_timestamp(stderr, stream,
 269                                         stream->prev_real_timestamp);
 270                         fprintf(stderr, "] and [");
 271                         ctf_print_timestamp(stderr, stream,
 272                                         stream->prev_real_timestamp_end);
 273                 }
 274                 fprintf(stderr, "]. You should consider recording a new trace with larger buffers or with fewer events enabled.\n");
 275                 fflush(stderr);
 276                 stream->events_discarded = 0;
 277         }
 278
 279         if (stream->has_timestamp) {
 280                 set_field_names_print(pos, ITEM_HEADER);
 281                 if (pos->print_names)
 282                         fprintf(pos->fp, "timestamp = ");
 283                 else
 284                         fprintf(pos->fp, "[");
 285                 if (opt_clock_cycles) {
 286                         ctf_print_timestamp(pos->fp, stream, stream->cycles_timestamp);
 287                 } else {
 288                         ctf_print_timestamp(pos->fp, stream, stream->real_timestamp);
 289                 }
 290                 if (!pos->print_names)
 291                         fprintf(pos->fp, "]");
 292
 293                 if (pos->print_names)
 294                         fprintf(pos->fp, ", ");
 295                 else
 296                         fprintf(pos->fp, " ");
 297         }
 298         if ((opt_delta_field || opt_all_fields) && stream->has_timestamp) {
 299                 uint64_t delta, delta_sec, delta_nsec;
 300
 301                 set_field_names_print(pos, ITEM_HEADER);
 302                 if (pos->print_names)
 303                         fprintf(pos->fp, "delta = ");
 304                 else
 305                         fprintf(pos->fp, "(");
 306                 if (pos->last_real_timestamp != -1ULL) {
 307                         delta = stream->real_timestamp - pos->last_real_timestamp;
 308                         delta_sec = delta / NSEC_PER_SEC;
 309                         delta_nsec = delta % NSEC_PER_SEC;
 310                         fprintf(pos->fp, "+%" PRIu64 ".%09" PRIu64,
 311                                 delta_sec, delta_nsec);
 312                 } else {
 313                         fprintf(pos->fp, "+?.?????????");
 314                 }
 315                 if (!pos->print_names)
 316                         fprintf(pos->fp, ")");
 317
 318                 if (pos->print_names)
 319                         fprintf(pos->fp, ", ");
 320                 else
 321                         fprintf(pos->fp, " ");
 322                 pos->last_real_timestamp = stream->real_timestamp;
 323                 pos->last_cycles_timestamp = stream->cycles_timestamp;
 324         }
 325
 326         if ((opt_trace_field || opt_all_fields) && stream_class->trace->path[0] != '\0') {
 327                 set_field_names_print(pos, ITEM_HEADER);
 328                 if (pos->print_names) {
 329                         fprintf(pos->fp, "trace = ");
 330                 }
 331                 fprintf(pos->fp, "%s", stream_class->trace->path);
 332                 if (pos->print_names)
 333                         fprintf(pos->fp, ", ");
 334                 else
 335                         fprintf(pos->fp, " ");
 336         }
 337         if ((opt_trace_hostname_field || opt_all_fields || opt_trace_default_fields)
 338                         && stream_class->trace->env.hostname[0] != '\0') {
 339                 set_field_names_print(pos, ITEM_HEADER);
 340                 if (pos->print_names) {
 341                         fprintf(pos->fp, "trace:hostname = ");
 342                 }
 343                 fprintf(pos->fp, "%s", stream_class->trace->env.hostname);
 344                 if (pos->print_names)
 345                         fprintf(pos->fp, ", ");
 346                 dom_print = 1;
 347         }
 348         if ((opt_trace_domain_field || opt_all_fields) && stream_class->trace->env.domain[0] != '\0') {
 349                 set_field_names_print(pos, ITEM_HEADER);
 350                 if (pos->print_names) {
 351                         fprintf(pos->fp, "trace:domain = ");
 352                 }
 353                 fprintf(pos->fp, "%s", stream_class->trace->env.domain);
 354                 if (pos->print_names)
 355                         fprintf(pos->fp, ", ");
 356                 dom_print = 1;
 357         }
 358         if ((opt_trace_procname_field || opt_all_fields || opt_trace_default_fields)
 359                         && stream_class->trace->env.procname[0] != '\0') {
 360                 set_field_names_print(pos, ITEM_HEADER);
 361                 if (pos->print_names) {
 362                         fprintf(pos->fp, "trace:procname = ");
 363                 } else if (dom_print) {
 364                         fprintf(pos->fp, ":");
 365                 }
 366                 fprintf(pos->fp, "%s", stream_class->trace->env.procname);
 367                 if (pos->print_names)
 368                         fprintf(pos->fp, ", ");
 369                 dom_print = 1;
 370         }
 371         if ((opt_trace_vpid_field || opt_all_fields || opt_trace_default_fields)
 372                         && stream_class->trace->env.vpid != -1) {
 373                 set_field_names_print(pos, ITEM_HEADER);
 374                 if (pos->print_names) {
 375                         fprintf(pos->fp, "trace:vpid = ");
 376                 } else if (dom_print) {
 377                         fprintf(pos->fp, ":");
 378                 }
 379                 fprintf(pos->fp, "%d", stream_class->trace->env.vpid);
 380                 if (pos->print_names)
 381                         fprintf(pos->fp, ", ");
 382                 dom_print = 1;
 383         }
 384         if ((opt_loglevel_field || opt_all_fields) && event_class->loglevel != -1) {
 385                 set_field_names_print(pos, ITEM_HEADER);
 386                 if (pos->print_names) {
 387                         fprintf(pos->fp, "loglevel = ");
 388                 } else if (dom_print) {
 389                         fprintf(pos->fp, ":");
 390                 }
 391                 fprintf(pos->fp, "%s (%d)",
 392                         print_loglevel(event_class->loglevel),
 393                         event_class->loglevel);
 394                 if (pos->print_names)
 395                         fprintf(pos->fp, ", ");
 396                 dom_print = 1;
 397         }
 398         if ((opt_emf_field || opt_all_fields) && event_class->model_emf_uri) {
 399                 set_field_names_print(pos, ITEM_HEADER);
 400                 if (pos->print_names) {
 401                         fprintf(pos->fp, "model.emf.uri = ");
 402                 } else if (dom_print) {
 403                         fprintf(pos->fp, ":");
 404                 }
 405                 fprintf(pos->fp, "\"%s\"",
 406                         g_quark_to_string(event_class->model_emf_uri));
 407                 if (pos->print_names)
 408                         fprintf(pos->fp, ", ");
 409                 dom_print = 1;
 410         }
 411         if ((opt_callsite_field || opt_all_fields)) {
 412                 struct ctf_callsite_dups *cs_dups;
 413                 struct ctf_callsite *callsite;
 414
 415                 cs_dups = ctf_trace_callsite_lookup(stream_class->trace,
 416                                 event_class->name);
 417                 if (cs_dups) {
 418                         int i = 0;
 419
 420                         set_field_names_print(pos, ITEM_HEADER);
 421                         if (pos->print_names) {
 422                                 fprintf(pos->fp, "callsite = ");
 423                         } else if (dom_print) {
 424                                 fprintf(pos->fp, ":");
 425                         }
 426                         fprintf(pos->fp, "[");
 427                         bt_list_for_each_entry(callsite, &cs_dups->head, node) {
 428                                 if (i != 0)
 429                                         fprintf(pos->fp, ",");
 430                                 fprintf(pos->fp, "%s@%s:%" PRIu64 "",
 431                                         callsite->func, callsite->file,
 432                                         callsite->line);
 433                                 i++;
 434                         }
 435                         fprintf(pos->fp, "]");
 436                         if (pos->print_names)
 437                                 fprintf(pos->fp, ", ");
 438                         dom_print = 1;
 439                 }
 440         }
 441         if (dom_print && !pos->print_names)
 442                 fprintf(pos->fp, " ");
 443         set_field_names_print(pos, ITEM_HEADER);
 444         if (pos->print_names)
 445                 fprintf(pos->fp, "name = ");
 446         fprintf(pos->fp, "%s", g_quark_to_string(event_class->name));
 447         if (pos->print_names)
 448                 pos->field_nr++;
 449         else
 450                 fprintf(pos->fp, ":");
 451
 452         /* print cpuid field from packet context */
 453         if (stream->stream_packet_context) {
 454                 if (pos->field_nr++ != 0)
 455                         fprintf(pos->fp, ",");
 456                 set_field_names_print(pos, ITEM_SCOPE);
 457                 if (pos->print_names)
 458                         fprintf(pos->fp, " stream.packet.context =");
 459                 field_nr_saved = pos->field_nr;
 460                 pos->field_nr = 0;
 461                 set_field_names_print(pos, ITEM_CONTEXT);
 462                 ret = generic_rw(ppos, &stream->stream_packet_context->p);
 463                 if (ret)
 464                         goto error;
 465                 pos->field_nr = field_nr_saved;
 466         }
 467
 468         /* Only show the event header in verbose mode */
 469         if (babeltrace_verbose && stream->stream_event_header) {
 470                 if (pos->field_nr++ != 0)
 471                         fprintf(pos->fp, ",");
 472                 set_field_names_print(pos, ITEM_SCOPE);
 473                 if (pos->print_names)
 474                         fprintf(pos->fp, " stream.event.header =");
 475                 field_nr_saved = pos->field_nr;
 476                 pos->field_nr = 0;
 477                 set_field_names_print(pos, ITEM_CONTEXT);
 478                 ret = generic_rw(ppos, &stream->stream_event_header->p);
 479                 if (ret)
 480                         goto error;
 481                 pos->field_nr = field_nr_saved;
 482         }
 483
 484         /* print stream-declared event context */
 485         if (stream->stream_event_context) {
 486                 if (pos->field_nr++ != 0)
 487                         fprintf(pos->fp, ",");
 488                 set_field_names_print(pos, ITEM_SCOPE);
 489                 if (pos->print_names)
 490                         fprintf(pos->fp, " stream.event.context =");
 491                 field_nr_saved = pos->field_nr;
 492                 pos->field_nr = 0;
 493                 set_field_names_print(pos, ITEM_CONTEXT);
 494                 ret = generic_rw(ppos, &stream->stream_event_context->p);
 495                 if (ret)
 496                         goto error;
 497                 pos->field_nr = field_nr_saved;
 498         }
 499
 500         /* print event-declared event context */
 501         if (event->event_context) {
 502                 if (pos->field_nr++ != 0)
 503                         fprintf(pos->fp, ",");
 504                 set_field_names_print(pos, ITEM_SCOPE);
 505                 if (pos->print_names)
 506                         fprintf(pos->fp, " event.context =");
 507                 field_nr_saved = pos->field_nr;
 508                 pos->field_nr = 0;
 509                 set_field_names_print(pos, ITEM_CONTEXT);
 510                 ret = generic_rw(ppos, &event->event_context->p);
 511                 if (ret)
 512                         goto error;
 513                 pos->field_nr = field_nr_saved;
 514         }
 515
 516         /* Read and print event payload */
 517         if (event->event_fields) {
 518                 if (pos->field_nr++ != 0)
 519                         fprintf(pos->fp, ",");
 520                 set_field_names_print(pos, ITEM_SCOPE);
 521                 if (pos->print_names)
 522                         fprintf(pos->fp, " event.fields =");
 523                 field_nr_saved = pos->field_nr;
 524                 pos->field_nr = 0;
 525                 set_field_names_print(pos, ITEM_PAYLOAD);
 526                 ret = generic_rw(ppos, &event->event_fields->p);
 527                 if (ret)
 528                         goto error;
 529                 pos->field_nr = field_nr_saved;
 530         }
 531         /* newline */
 532         fprintf(pos->fp, "\n");
 533         pos->field_nr = 0;
 534
 535         return 0;
 536
 537 error:
 538         fprintf(stderr, "[error] Unexpected end of stream. Either the trace data stream is corrupted or metadata description does not match data layout.\n");
 539         return ret;
 540 }
 541
 542
 543 struct trace_descriptor *ctf_text_open_trace(const char *path, int flags,
 544                 void (*packet_seek)(struct stream_pos *pos, size_t index,
 545                         int whence), FILE *metadata_fp)
 546 {
 547         struct ctf_text_stream_pos *pos;
 548         FILE *fp;
 549
 550         pos = g_new0(struct ctf_text_stream_pos, 1);
 551
 552         pos->last_real_timestamp = -1ULL;
 553         pos->last_cycles_timestamp = -1ULL;
 554         switch (flags & O_ACCMODE) {
 555         case O_RDWR:
 556                 if (!path)
 557                         fp = stdout;
 558                 else
 559                         fp = fopen(path, "w");
 560                 if (!fp)
 561                         goto error;
 562                 pos->fp = fp;
 563                 pos->parent.rw_table = write_dispatch_table;
 564                 pos->parent.event_cb = ctf_text_write_event;
 565                 pos->print_names = 0;
 566                 break;
 567         case O_RDONLY:
 568         default:
 569                 fprintf(stderr, "[error] Incorrect open flags.\n");
 570                 goto error;
 571         }
 572
 573         return &pos->trace_descriptor;
 574 error:
 575         g_free(pos);
 576         return NULL;
 577 }
 578
 579 void ctf_text_close_trace(struct trace_descriptor *td)
 580 {
 581         struct ctf_text_stream_pos *pos =
 582                 container_of(td, struct ctf_text_stream_pos, trace_descriptor);
 583         fclose(pos->fp);
 584         g_free(pos);
 585 }
 586
 587 void __attribute__((constructor)) ctf_text_init(void)
 588 {
 589         int ret;
 590
 591         ctf_text_format.name = g_quark_from_static_string("text");
 592         ret = bt_register_format(&ctf_text_format);
 593         assert(!ret);
 594 }
 595
 596 /* TODO: finalize */