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  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  21  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  23  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  24  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  25  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  26  * SOFTWARE.
  27  */
  28
  29 #include <babeltrace/format.h>
  30 #include <babeltrace/ctf-text/types.h>
  31 #include <babeltrace/ctf/metadata.h>
  32 #include <babeltrace/babeltrace-internal.h>
  33 #include <babeltrace/ctf/events-internal.h>
  34 #include <inttypes.h>
  35 #include <sys/mman.h>
  36 #include <errno.h>
  37 #include <sys/types.h>
  38 #include <sys/stat.h>
  39 #include <fcntl.h>
  40 #include <dirent.h>
  41 #include <glib.h>
  42 #include <unistd.h>
  43 #include <stdlib.h>
  44
  45 #define NSEC_PER_SEC 1000000000ULL
  46
  47 int opt_all_field_names,
  48         opt_scope_field_names,
  49         opt_header_field_names,
  50         opt_context_field_names,
  51         opt_payload_field_names,
  52         opt_all_fields,
  53         opt_trace_field,
  54         opt_trace_domain_field,
  55         opt_trace_procname_field,
  56         opt_trace_vpid_field,
  57         opt_trace_hostname_field,
  58         opt_trace_default_fields = 1,
  59         opt_loglevel_field,
  60         opt_emf_field,
  61         opt_callsite_field,
  62         opt_delta_field = 1;
  63
  64 enum field_item {
  65         ITEM_SCOPE,
  66         ITEM_HEADER,
  67         ITEM_CONTEXT,
  68         ITEM_PAYLOAD,
  69 };
  70
  71 enum bt_loglevel {
  72         BT_LOGLEVEL_EMERG                  = 0,
  73         BT_LOGLEVEL_ALERT                  = 1,
  74         BT_LOGLEVEL_CRIT                   = 2,
  75         BT_LOGLEVEL_ERR                    = 3,
  76         BT_LOGLEVEL_WARNING                = 4,
  77         BT_LOGLEVEL_NOTICE                 = 5,
  78         BT_LOGLEVEL_INFO                   = 6,
  79         BT_LOGLEVEL_DEBUG_SYSTEM           = 7,
  80         BT_LOGLEVEL_DEBUG_PROGRAM          = 8,
  81         BT_LOGLEVEL_DEBUG_PROCESS          = 9,
  82         BT_LOGLEVEL_DEBUG_MODULE           = 10,
  83         BT_LOGLEVEL_DEBUG_UNIT             = 11,
  84         BT_LOGLEVEL_DEBUG_FUNCTION         = 12,
  85         BT_LOGLEVEL_DEBUG_LINE             = 13,
  86         BT_LOGLEVEL_DEBUG                  = 14,
  87 };
  88
  89 static
  90 struct bt_trace_descriptor *ctf_text_open_trace(const char *path, int flags,
  91                 void (*packet_seek)(struct bt_stream_pos *pos, size_t index,
  92                         int whence), FILE *metadata_fp);
  93 static
  94 int ctf_text_close_trace(struct bt_trace_descriptor *descriptor);
  95
  96 static
  97 rw_dispatch write_dispatch_table[] = {
  98         [ CTF_TYPE_INTEGER ] = ctf_text_integer_write,
  99         [ CTF_TYPE_FLOAT ] = ctf_text_float_write,
 100         [ CTF_TYPE_ENUM ] = ctf_text_enum_write,
 101         [ CTF_TYPE_STRING ] = ctf_text_string_write,
 102         [ CTF_TYPE_STRUCT ] = ctf_text_struct_write,
 103         [ CTF_TYPE_VARIANT ] = ctf_text_variant_write,
 104         [ CTF_TYPE_ARRAY ] = ctf_text_array_write,
 105         [ CTF_TYPE_SEQUENCE ] = ctf_text_sequence_write,
 106 };
 107
 108 static
 109 struct bt_format ctf_text_format = {
 110         .open_trace = ctf_text_open_trace,
 111         .close_trace = ctf_text_close_trace,
 112 };
 113
 114 static GQuark Q_STREAM_PACKET_CONTEXT_TIMESTAMP_BEGIN,
 115         Q_STREAM_PACKET_CONTEXT_TIMESTAMP_END,
 116         Q_STREAM_PACKET_CONTEXT_EVENTS_DISCARDED,
 117         Q_STREAM_PACKET_CONTEXT_CONTENT_SIZE,
 118         Q_STREAM_PACKET_CONTEXT_PACKET_SIZE;
 119
 120 static
 121 void __attribute__((constructor)) init_quarks(void)
 122 {
 123         Q_STREAM_PACKET_CONTEXT_TIMESTAMP_BEGIN = g_quark_from_static_string("stream.packet.context.timestamp_begin");
 124         Q_STREAM_PACKET_CONTEXT_TIMESTAMP_END = g_quark_from_static_string("stream.packet.context.timestamp_end");
 125         Q_STREAM_PACKET_CONTEXT_EVENTS_DISCARDED = g_quark_from_static_string("stream.packet.context.events_discarded");
 126         Q_STREAM_PACKET_CONTEXT_CONTENT_SIZE = g_quark_from_static_string("stream.packet.context.content_size");
 127         Q_STREAM_PACKET_CONTEXT_PACKET_SIZE = g_quark_from_static_string("stream.packet.context.packet_size");
 128 }
 129
 130 static
 131 struct ctf_callsite_dups *ctf_trace_callsite_lookup(struct ctf_trace *trace,
 132                         GQuark callsite_name)
 133 {
 134         return g_hash_table_lookup(trace->callsites,
 135                         (gpointer) (unsigned long) callsite_name);
 136 }
 137
 138 int print_field(struct bt_definition *definition)
 139 {
 140         /* Print all fields in verbose mode */
 141         if (babeltrace_verbose)
 142                 return 1;
 143
 144         /* Filter out part of the packet context */
 145         if (definition->path == Q_STREAM_PACKET_CONTEXT_TIMESTAMP_BEGIN)
 146                 return 0;
 147         if (definition->path == Q_STREAM_PACKET_CONTEXT_TIMESTAMP_END)
 148                 return 0;
 149         if (definition->path == Q_STREAM_PACKET_CONTEXT_EVENTS_DISCARDED)
 150                 return 0;
 151         if (definition->path == Q_STREAM_PACKET_CONTEXT_CONTENT_SIZE)
 152                 return 0;
 153         if (definition->path == Q_STREAM_PACKET_CONTEXT_PACKET_SIZE)
 154                 return 0;
 155
 156         return 1;
 157 }
 158
 159 static
 160 void set_field_names_print(struct ctf_text_stream_pos *pos, enum field_item item)
 161 {
 162         switch (item) {
 163         case ITEM_SCOPE:
 164                 if (opt_all_field_names || opt_scope_field_names)
 165                         pos->print_names = 1;
 166                 else
 167                         pos->print_names = 0;
 168                 break;
 169         case ITEM_HEADER:
 170                 if (opt_all_field_names || opt_header_field_names)
 171                         pos->print_names = 1;
 172                 else
 173                         pos->print_names = 0;
 174                 break;
 175         case ITEM_CONTEXT:
 176                 if (opt_all_field_names || opt_context_field_names)
 177                         pos->print_names = 1;
 178                 else
 179                         pos->print_names = 0;
 180                 break;
 181         case ITEM_PAYLOAD:
 182                 if (opt_all_field_names || opt_payload_field_names)
 183                         pos->print_names = 1;
 184                 else
 185                         pos->print_names = 0;
 186
 187                 break;
 188         default:
 189                 assert(0);
 190         }
 191 }
 192
 193 static
 194 const char *print_loglevel(int value)
 195 {
 196         switch (value) {
 197         case -1:
 198                 return "";
 199         case BT_LOGLEVEL_EMERG:
 200                 return "TRACE_EMERG";
 201         case BT_LOGLEVEL_ALERT:
 202                 return "TRACE_ALERT";
 203         case BT_LOGLEVEL_CRIT:
 204                 return "TRACE_CRIT";
 205         case BT_LOGLEVEL_ERR:
 206                 return "TRACE_ERR";
 207         case BT_LOGLEVEL_WARNING:
 208                 return "TRACE_WARNING";
 209         case BT_LOGLEVEL_NOTICE:
 210                 return "TRACE_NOTICE";
 211         case BT_LOGLEVEL_INFO:
 212                 return "TRACE_INFO";
 213         case BT_LOGLEVEL_DEBUG_SYSTEM:
 214                 return "TRACE_DEBUG_SYSTEM";
 215         case BT_LOGLEVEL_DEBUG_PROGRAM:
 216                 return "TRACE_DEBUG_PROGRAM";
 217         case BT_LOGLEVEL_DEBUG_PROCESS:
 218                 return "TRACE_DEBUG_PROCESS";
 219         case BT_LOGLEVEL_DEBUG_MODULE:
 220                 return "TRACE_DEBUG_MODULE";
 221         case BT_LOGLEVEL_DEBUG_UNIT:
 222                 return "TRACE_DEBUG_UNIT";
 223         case BT_LOGLEVEL_DEBUG_FUNCTION:
 224                 return "TRACE_DEBUG_FUNCTION";
 225         case BT_LOGLEVEL_DEBUG_LINE:
 226                 return "TRACE_DEBUG_LINE";
 227         case BT_LOGLEVEL_DEBUG:
 228                 return "TRACE_DEBUG";
 229         default:
 230                 return "<<UNKNOWN>>";
 231         }
 232 }
 233
 234 static
 235 int ctf_text_write_event(struct bt_stream_pos *ppos, struct ctf_stream_definition *stream)
 236
 237 {
 238         struct ctf_text_stream_pos *pos =
 239                 container_of(ppos, struct ctf_text_stream_pos, parent);
 240         struct ctf_stream_declaration *stream_class = stream->stream_class;
 241         int field_nr_saved;
 242         struct ctf_event_declaration *event_class;
 243         struct ctf_event_definition *event;
 244         uint64_t id;
 245         int ret;
 246         int dom_print = 0;
 247
 248         id = stream->event_id;
 249
 250         if (id >= stream_class->events_by_id->len) {
 251                 fprintf(stderr, "[error] Event id %" PRIu64 " is outside range.\n", id);
 252                 return -EINVAL;
 253         }
 254         event = g_ptr_array_index(stream->events_by_id, id);
 255         if (!event) {
 256                 fprintf(stderr, "[error] Event id %" PRIu64 " is unknown.\n", id);
 257                 return -EINVAL;
 258         }
 259         event_class = g_ptr_array_index(stream_class->events_by_id, id);
 260         if (!event_class) {
 261                 fprintf(stderr, "[error] Event class id %" PRIu64 " is unknown.\n", id);
 262                 return -EINVAL;
 263         }
 264
 265         if (stream->has_timestamp) {
 266                 set_field_names_print(pos, ITEM_HEADER);
 267                 if (pos->print_names)
 268                         fprintf(pos->fp, "timestamp = ");
 269                 else
 270                         fprintf(pos->fp, "[");
 271                 if (opt_clock_cycles) {
 272                         ctf_print_timestamp(pos->fp, stream, stream->cycles_timestamp);
 273                 } else {
 274                         ctf_print_timestamp(pos->fp, stream, stream->real_timestamp);
 275                 }
 276                 if (!pos->print_names)
 277                         fprintf(pos->fp, "]");
 278
 279                 if (pos->print_names)
 280                         fprintf(pos->fp, ", ");
 281                 else
 282                         fprintf(pos->fp, " ");
 283         }
 284         if (opt_delta_field && stream->has_timestamp) {
 285                 uint64_t delta, delta_sec, delta_nsec;
 286
 287                 set_field_names_print(pos, ITEM_HEADER);
 288                 if (pos->print_names)
 289                         fprintf(pos->fp, "delta = ");
 290                 else
 291                         fprintf(pos->fp, "(");
 292                 if (pos->last_real_timestamp != -1ULL) {
 293                         delta = stream->real_timestamp - pos->last_real_timestamp;
 294                         delta_sec = delta / NSEC_PER_SEC;
 295                         delta_nsec = delta % NSEC_PER_SEC;
 296                         fprintf(pos->fp, "+%" PRIu64 ".%09" PRIu64,
 297                                 delta_sec, delta_nsec);
 298                 } else {
 299                         fprintf(pos->fp, "+?.?????????");
 300                 }
 301                 if (!pos->print_names)
 302                         fprintf(pos->fp, ")");
 303
 304                 if (pos->print_names)
 305                         fprintf(pos->fp, ", ");
 306                 else
 307                         fprintf(pos->fp, " ");
 308                 pos->last_real_timestamp = stream->real_timestamp;
 309                 pos->last_cycles_timestamp = stream->cycles_timestamp;
 310         }
 311
 312         if ((opt_trace_field || opt_all_fields) && stream_class->trace->parent.path[0] != '\0') {
 313                 set_field_names_print(pos, ITEM_HEADER);
 314                 if (pos->print_names) {
 315                         fprintf(pos->fp, "trace = ");
 316                 }
 317                 fprintf(pos->fp, "%s", stream_class->trace->parent.path);
 318                 if (pos->print_names)
 319                         fprintf(pos->fp, ", ");
 320                 else
 321                         fprintf(pos->fp, " ");
 322         }
 323         if ((opt_trace_hostname_field || opt_all_fields || opt_trace_default_fields)
 324                         && stream_class->trace->env.hostname[0] != '\0') {
 325                 set_field_names_print(pos, ITEM_HEADER);
 326                 if (pos->print_names) {
 327                         fprintf(pos->fp, "trace:hostname = ");
 328                 }
 329                 fprintf(pos->fp, "%s", stream_class->trace->env.hostname);
 330                 if (pos->print_names)
 331                         fprintf(pos->fp, ", ");
 332                 dom_print = 1;
 333         }
 334         if ((opt_trace_domain_field || opt_all_fields) && stream_class->trace->env.domain[0] != '\0') {
 335                 set_field_names_print(pos, ITEM_HEADER);
 336                 if (pos->print_names) {
 337                         fprintf(pos->fp, "trace:domain = ");
 338                 }
 339                 fprintf(pos->fp, "%s", stream_class->trace->env.domain);
 340                 if (pos->print_names)
 341                         fprintf(pos->fp, ", ");
 342                 dom_print = 1;
 343         }
 344         if ((opt_trace_procname_field || opt_all_fields || opt_trace_default_fields)
 345                         && stream_class->trace->env.procname[0] != '\0') {
 346                 set_field_names_print(pos, ITEM_HEADER);
 347                 if (pos->print_names) {
 348                         fprintf(pos->fp, "trace:procname = ");
 349                 } else if (dom_print) {
 350                         fprintf(pos->fp, ":");
 351                 }
 352                 fprintf(pos->fp, "%s", stream_class->trace->env.procname);
 353                 if (pos->print_names)
 354                         fprintf(pos->fp, ", ");
 355                 dom_print = 1;
 356         }
 357         if ((opt_trace_vpid_field || opt_all_fields || opt_trace_default_fields)
 358                         && stream_class->trace->env.vpid != -1) {
 359                 set_field_names_print(pos, ITEM_HEADER);
 360                 if (pos->print_names) {
 361                         fprintf(pos->fp, "trace:vpid = ");
 362                 } else if (dom_print) {
 363                         fprintf(pos->fp, ":");
 364                 }
 365                 fprintf(pos->fp, "%d", stream_class->trace->env.vpid);
 366                 if (pos->print_names)
 367                         fprintf(pos->fp, ", ");
 368                 dom_print = 1;
 369         }
 370         if ((opt_loglevel_field || opt_all_fields) && event_class->loglevel != -1) {
 371                 set_field_names_print(pos, ITEM_HEADER);
 372                 if (pos->print_names) {
 373                         fprintf(pos->fp, "loglevel = ");
 374                 } else if (dom_print) {
 375                         fprintf(pos->fp, ":");
 376                 }
 377                 fprintf(pos->fp, "%s (%d)",
 378                         print_loglevel(event_class->loglevel),
 379                         event_class->loglevel);
 380                 if (pos->print_names)
 381                         fprintf(pos->fp, ", ");
 382                 dom_print = 1;
 383         }
 384         if ((opt_emf_field || opt_all_fields) && event_class->model_emf_uri) {
 385                 set_field_names_print(pos, ITEM_HEADER);
 386                 if (pos->print_names) {
 387                         fprintf(pos->fp, "model.emf.uri = ");
 388                 } else if (dom_print) {
 389                         fprintf(pos->fp, ":");
 390                 }
 391                 fprintf(pos->fp, "\"%s\"",
 392                         g_quark_to_string(event_class->model_emf_uri));
 393                 if (pos->print_names)
 394                         fprintf(pos->fp, ", ");
 395                 dom_print = 1;
 396         }
 397         if ((opt_callsite_field || opt_all_fields)) {
 398                 struct ctf_callsite_dups *cs_dups;
 399                 struct ctf_callsite *callsite;
 400
 401                 cs_dups = ctf_trace_callsite_lookup(stream_class->trace,
 402                                 event_class->name);
 403                 if (cs_dups) {
 404                         int i = 0;
 405
 406                         set_field_names_print(pos, ITEM_HEADER);
 407                         if (pos->print_names) {
 408                                 fprintf(pos->fp, "callsite = ");
 409                         } else if (dom_print) {
 410                                 fprintf(pos->fp, ":");
 411                         }
 412                         fprintf(pos->fp, "[");
 413                         bt_list_for_each_entry(callsite, &cs_dups->head, node) {
 414                                 if (i != 0)
 415                                         fprintf(pos->fp, ",");
 416                                 if (CTF_CALLSITE_FIELD_IS_SET(callsite, ip)) {
 417                                         fprintf(pos->fp, "%s@0x%" PRIx64 ":%s:%" PRIu64 "",
 418                                                 callsite->func, callsite->ip, callsite->file,
 419                                                 callsite->line);
 420                                 } else {
 421                                         fprintf(pos->fp, "%s:%s:%" PRIu64 "",
 422                                                 callsite->func, callsite->file,
 423                                                 callsite->line);
 424                                 }
 425                                 i++;
 426                         }
 427                         fprintf(pos->fp, "]");
 428                         if (pos->print_names)
 429                                 fprintf(pos->fp, ", ");
 430                         dom_print = 1;
 431                 }
 432         }
 433         if (dom_print && !pos->print_names)
 434                 fprintf(pos->fp, " ");
 435         set_field_names_print(pos, ITEM_HEADER);
 436         if (pos->print_names)
 437                 fprintf(pos->fp, "name = ");
 438         fprintf(pos->fp, "%s", g_quark_to_string(event_class->name));
 439         if (pos->print_names)
 440                 pos->field_nr++;
 441         else
 442                 fprintf(pos->fp, ":");
 443
 444         /* print cpuid field from packet context */
 445         if (stream->stream_packet_context) {
 446                 if (pos->field_nr++ != 0)
 447                         fprintf(pos->fp, ",");
 448                 set_field_names_print(pos, ITEM_SCOPE);
 449                 if (pos->print_names)
 450                         fprintf(pos->fp, " stream.packet.context =");
 451                 field_nr_saved = pos->field_nr;
 452                 pos->field_nr = 0;
 453                 set_field_names_print(pos, ITEM_CONTEXT);
 454                 ret = generic_rw(ppos, &stream->stream_packet_context->p);
 455                 if (ret)
 456                         goto error;
 457                 pos->field_nr = field_nr_saved;
 458         }
 459
 460         /* Only show the event header in verbose mode */
 461         if (babeltrace_verbose && stream->stream_event_header) {
 462                 if (pos->field_nr++ != 0)
 463                         fprintf(pos->fp, ",");
 464                 set_field_names_print(pos, ITEM_SCOPE);
 465                 if (pos->print_names)
 466                         fprintf(pos->fp, " stream.event.header =");
 467                 field_nr_saved = pos->field_nr;
 468                 pos->field_nr = 0;
 469                 set_field_names_print(pos, ITEM_CONTEXT);
 470                 ret = generic_rw(ppos, &stream->stream_event_header->p);
 471                 if (ret)
 472                         goto error;
 473                 pos->field_nr = field_nr_saved;
 474         }
 475
 476         /* print stream-declared event context */
 477         if (stream->stream_event_context) {
 478                 if (pos->field_nr++ != 0)
 479                         fprintf(pos->fp, ",");
 480                 set_field_names_print(pos, ITEM_SCOPE);
 481                 if (pos->print_names)
 482                         fprintf(pos->fp, " stream.event.context =");
 483                 field_nr_saved = pos->field_nr;
 484                 pos->field_nr = 0;
 485                 set_field_names_print(pos, ITEM_CONTEXT);
 486                 ret = generic_rw(ppos, &stream->stream_event_context->p);
 487                 if (ret)
 488                         goto error;
 489                 pos->field_nr = field_nr_saved;
 490         }
 491
 492         /* print event-declared event context */
 493         if (event->event_context) {
 494                 if (pos->field_nr++ != 0)
 495                         fprintf(pos->fp, ",");
 496                 set_field_names_print(pos, ITEM_SCOPE);
 497                 if (pos->print_names)
 498                         fprintf(pos->fp, " event.context =");
 499                 field_nr_saved = pos->field_nr;
 500                 pos->field_nr = 0;
 501                 set_field_names_print(pos, ITEM_CONTEXT);
 502                 ret = generic_rw(ppos, &event->event_context->p);
 503                 if (ret)
 504                         goto error;
 505                 pos->field_nr = field_nr_saved;
 506         }
 507
 508         /* Read and print event payload */
 509         if (event->event_fields) {
 510                 if (pos->field_nr++ != 0)
 511                         fprintf(pos->fp, ",");
 512                 set_field_names_print(pos, ITEM_SCOPE);
 513                 if (pos->print_names)
 514                         fprintf(pos->fp, " event.fields =");
 515                 field_nr_saved = pos->field_nr;
 516                 pos->field_nr = 0;
 517                 set_field_names_print(pos, ITEM_PAYLOAD);
 518                 ret = generic_rw(ppos, &event->event_fields->p);
 519                 if (ret)
 520                         goto error;
 521                 pos->field_nr = field_nr_saved;
 522         }
 523         /* newline */
 524         fprintf(pos->fp, "\n");
 525         pos->field_nr = 0;
 526
 527         return 0;
 528
 529 error:
 530         fprintf(stderr, "[error] Unexpected end of stream. Either the trace data stream is corrupted or metadata description does not match data layout.\n");
 531         return ret;
 532 }
 533
 534 static
 535 struct bt_trace_descriptor *ctf_text_open_trace(const char *path, int flags,
 536                 void (*packet_seek)(struct bt_stream_pos *pos, size_t index,
 537                         int whence), FILE *metadata_fp)
 538 {
 539         struct ctf_text_stream_pos *pos;
 540         FILE *fp;
 541
 542         pos = g_new0(struct ctf_text_stream_pos, 1);
 543
 544         pos->last_real_timestamp = -1ULL;
 545         pos->last_cycles_timestamp = -1ULL;
 546         switch (flags & O_ACCMODE) {
 547         case O_RDWR:
 548                 if (!path)
 549                         fp = stdout;
 550                 else
 551                         fp = fopen(path, "w");
 552                 if (!fp)
 553                         goto error;
 554                 pos->fp = fp;
 555                 pos->parent.rw_table = write_dispatch_table;
 556                 pos->parent.event_cb = ctf_text_write_event;
 557                 pos->parent.trace = &pos->trace_descriptor;
 558                 pos->print_names = 0;
 559                 babeltrace_ctf_console_output++;
 560                 break;
 561         case O_RDONLY:
 562         default:
 563                 fprintf(stderr, "[error] Incorrect open flags.\n");
 564                 goto error;
 565         }
 566
 567         return &pos->trace_descriptor;
 568 error:
 569         g_free(pos);
 570         return NULL;
 571 }
 572
 573 static
 574 int ctf_text_close_trace(struct bt_trace_descriptor *td)
 575 {
 576         int ret;
 577         struct ctf_text_stream_pos *pos =
 578                 container_of(td, struct ctf_text_stream_pos, trace_descriptor);
 579
 580         babeltrace_ctf_console_output--;
 581         if (pos->fp != stdout) {
 582                 ret = fclose(pos->fp);
 583                 if (ret) {
 584                         perror("Error on fclose");
 585                         return -1;
 586                 }
 587         }
 588         g_free(pos);
 589         return 0;
 590 }
 591
 592 static
 593 void __attribute__((constructor)) ctf_text_init(void)
 594 {
 595         int ret;
 596
 597         ctf_text_format.name = g_quark_from_static_string("text");
 598         ret = bt_register_format(&ctf_text_format);
 599         assert(!ret);
 600 }
 601
 602 static
 603 void __attribute__((destructor)) ctf_text_exit(void)
 604 {
 605         bt_unregister_format(&ctf_text_format);
 606 }