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 1000000000LL
  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         Q_STREAM_PACKET_CONTEXT_PACKET_SEQ_NUM;
 120
 121 static
 122 void __attribute__((constructor)) init_quarks(void)
 123 {
 124         Q_STREAM_PACKET_CONTEXT_TIMESTAMP_BEGIN = g_quark_from_static_string("stream.packet.context.timestamp_begin");
 125         Q_STREAM_PACKET_CONTEXT_TIMESTAMP_END = g_quark_from_static_string("stream.packet.context.timestamp_end");
 126         Q_STREAM_PACKET_CONTEXT_EVENTS_DISCARDED = g_quark_from_static_string("stream.packet.context.events_discarded");
 127         Q_STREAM_PACKET_CONTEXT_CONTENT_SIZE = g_quark_from_static_string("stream.packet.context.content_size");
 128         Q_STREAM_PACKET_CONTEXT_PACKET_SIZE = g_quark_from_static_string("stream.packet.context.packet_size");
 129         Q_STREAM_PACKET_CONTEXT_PACKET_SEQ_NUM = g_quark_from_static_string("stream.packet.context.packet_seq_num");
 130 }
 131
 132 static
 133 struct ctf_callsite_dups *ctf_trace_callsite_lookup(struct ctf_trace *trace,
 134                         GQuark callsite_name)
 135 {
 136         return g_hash_table_lookup(trace->callsites,
 137                         (gpointer) (unsigned long) callsite_name);
 138 }
 139
 140 int print_field(struct bt_definition *definition)
 141 {
 142         /* Print all fields in verbose mode */
 143         if (babeltrace_verbose)
 144                 return 1;
 145
 146         /* Filter out part of the packet context */
 147         if (definition->path == Q_STREAM_PACKET_CONTEXT_TIMESTAMP_BEGIN)
 148                 return 0;
 149         if (definition->path == Q_STREAM_PACKET_CONTEXT_TIMESTAMP_END)
 150                 return 0;
 151         if (definition->path == Q_STREAM_PACKET_CONTEXT_EVENTS_DISCARDED)
 152                 return 0;
 153         if (definition->path == Q_STREAM_PACKET_CONTEXT_CONTENT_SIZE)
 154                 return 0;
 155         if (definition->path == Q_STREAM_PACKET_CONTEXT_PACKET_SIZE)
 156                 return 0;
 157         if (definition->path == Q_STREAM_PACKET_CONTEXT_PACKET_SEQ_NUM)
 158                 return 0;
 159
 160         return 1;
 161 }
 162
 163 static
 164 void set_field_names_print(struct ctf_text_stream_pos *pos, enum field_item item)
 165 {
 166         switch (item) {
 167         case ITEM_SCOPE:
 168                 if (opt_all_field_names || opt_scope_field_names)
 169                         pos->print_names = 1;
 170                 else
 171                         pos->print_names = 0;
 172                 break;
 173         case ITEM_HEADER:
 174                 if (opt_all_field_names || opt_header_field_names)
 175                         pos->print_names = 1;
 176                 else
 177                         pos->print_names = 0;
 178                 break;
 179         case ITEM_CONTEXT:
 180                 if (opt_all_field_names || opt_context_field_names)
 181                         pos->print_names = 1;
 182                 else
 183                         pos->print_names = 0;
 184                 break;
 185         case ITEM_PAYLOAD:
 186                 if (opt_all_field_names || opt_payload_field_names)
 187                         pos->print_names = 1;
 188                 else
 189                         pos->print_names = 0;
 190
 191                 break;
 192         default:
 193                 assert(0);
 194         }
 195 }
 196
 197 static
 198 const char *print_loglevel(int value)
 199 {
 200         switch (value) {
 201         case -1:
 202                 return "";
 203         case BT_LOGLEVEL_EMERG:
 204                 return "TRACE_EMERG";
 205         case BT_LOGLEVEL_ALERT:
 206                 return "TRACE_ALERT";
 207         case BT_LOGLEVEL_CRIT:
 208                 return "TRACE_CRIT";
 209         case BT_LOGLEVEL_ERR:
 210                 return "TRACE_ERR";
 211         case BT_LOGLEVEL_WARNING:
 212                 return "TRACE_WARNING";
 213         case BT_LOGLEVEL_NOTICE:
 214                 return "TRACE_NOTICE";
 215         case BT_LOGLEVEL_INFO:
 216                 return "TRACE_INFO";
 217         case BT_LOGLEVEL_DEBUG_SYSTEM:
 218                 return "TRACE_DEBUG_SYSTEM";
 219         case BT_LOGLEVEL_DEBUG_PROGRAM:
 220                 return "TRACE_DEBUG_PROGRAM";
 221         case BT_LOGLEVEL_DEBUG_PROCESS:
 222                 return "TRACE_DEBUG_PROCESS";
 223         case BT_LOGLEVEL_DEBUG_MODULE:
 224                 return "TRACE_DEBUG_MODULE";
 225         case BT_LOGLEVEL_DEBUG_UNIT:
 226                 return "TRACE_DEBUG_UNIT";
 227         case BT_LOGLEVEL_DEBUG_FUNCTION:
 228                 return "TRACE_DEBUG_FUNCTION";
 229         case BT_LOGLEVEL_DEBUG_LINE:
 230                 return "TRACE_DEBUG_LINE";
 231         case BT_LOGLEVEL_DEBUG:
 232                 return "TRACE_DEBUG";
 233         default:
 234                 return "<<UNKNOWN>>";
 235         }
 236 }
 237
 238 static
 239 int ctf_text_write_event(struct bt_stream_pos *ppos, struct ctf_stream_definition *stream)
 240
 241 {
 242         struct ctf_text_stream_pos *pos =
 243                 container_of(ppos, struct ctf_text_stream_pos, parent);
 244         struct ctf_stream_declaration *stream_class = stream->stream_class;
 245         int field_nr_saved;
 246         struct ctf_event_declaration *event_class;
 247         struct ctf_event_definition *event;
 248         uint64_t id;
 249         int ret;
 250         int dom_print = 0;
 251
 252         id = stream->event_id;
 253
 254         if (id >= stream_class->events_by_id->len) {
 255                 fprintf(stderr, "[error] Event id %" PRIu64 " is outside range.\n", id);
 256                 return -EINVAL;
 257         }
 258         event = g_ptr_array_index(stream->events_by_id, id);
 259         if (!event) {
 260                 fprintf(stderr, "[error] Event id %" PRIu64 " is unknown.\n", id);
 261                 return -EINVAL;
 262         }
 263         event_class = g_ptr_array_index(stream_class->events_by_id, id);
 264         if (!event_class) {
 265                 fprintf(stderr, "[error] Event class id %" PRIu64 " is unknown.\n", id);
 266                 return -EINVAL;
 267         }
 268
 269         if (stream->has_timestamp) {
 270                 set_field_names_print(pos, ITEM_HEADER);
 271                 if (pos->print_names)
 272                         fprintf(pos->fp, "timestamp = ");
 273                 else
 274                         fprintf(pos->fp, "[");
 275                 if (opt_clock_cycles) {
 276                         ctf_print_timestamp(pos->fp, stream, stream->cycles_timestamp);
 277                 } else {
 278                         ctf_print_timestamp(pos->fp, stream, stream->real_timestamp);
 279                 }
 280                 if (!pos->print_names)
 281                         fprintf(pos->fp, "]");
 282
 283                 if (pos->print_names)
 284                         fprintf(pos->fp, ", ");
 285                 else
 286                         fprintf(pos->fp, " ");
 287         }
 288         if (opt_delta_field && stream->has_timestamp) {
 289                 uint64_t delta, delta_sec, delta_nsec;
 290
 291                 set_field_names_print(pos, ITEM_HEADER);
 292                 if (pos->print_names)
 293                         fprintf(pos->fp, "delta = ");
 294                 else
 295                         fprintf(pos->fp, "(");
 296                 if (pos->last_real_timestamp != -1ULL) {
 297                         delta = stream->real_timestamp - pos->last_real_timestamp;
 298                         delta_sec = delta / NSEC_PER_SEC;
 299                         delta_nsec = delta % NSEC_PER_SEC;
 300                         fprintf(pos->fp, "+%" PRIu64 ".%09" PRIu64,
 301                                 delta_sec, delta_nsec);
 302                 } else {
 303                         fprintf(pos->fp, "+?.?????????");
 304                 }
 305                 if (!pos->print_names)
 306                         fprintf(pos->fp, ")");
 307
 308                 if (pos->print_names)
 309                         fprintf(pos->fp, ", ");
 310                 else
 311                         fprintf(pos->fp, " ");
 312                 pos->last_real_timestamp = stream->real_timestamp;
 313                 pos->last_cycles_timestamp = stream->cycles_timestamp;
 314         }
 315
 316         if ((opt_trace_field || opt_all_fields) && stream_class->trace->parent.path[0] != '\0') {
 317                 set_field_names_print(pos, ITEM_HEADER);
 318                 if (pos->print_names) {
 319                         fprintf(pos->fp, "trace = ");
 320                 }
 321                 fprintf(pos->fp, "%s", stream_class->trace->parent.path);
 322                 if (pos->print_names)
 323                         fprintf(pos->fp, ", ");
 324                 else
 325                         fprintf(pos->fp, " ");
 326         }
 327         if ((opt_trace_hostname_field || opt_all_fields || opt_trace_default_fields)
 328                         && stream_class->trace->env.hostname[0] != '\0') {
 329                 set_field_names_print(pos, ITEM_HEADER);
 330                 if (pos->print_names) {
 331                         fprintf(pos->fp, "trace:hostname = ");
 332                 }
 333                 fprintf(pos->fp, "%s", stream_class->trace->env.hostname);
 334                 if (pos->print_names)
 335                         fprintf(pos->fp, ", ");
 336                 dom_print = 1;
 337         }
 338         if ((opt_trace_domain_field || opt_all_fields) && stream_class->trace->env.domain[0] != '\0') {
 339                 set_field_names_print(pos, ITEM_HEADER);
 340                 if (pos->print_names) {
 341                         fprintf(pos->fp, "trace:domain = ");
 342                 }
 343                 fprintf(pos->fp, "%s", stream_class->trace->env.domain);
 344                 if (pos->print_names)
 345                         fprintf(pos->fp, ", ");
 346                 dom_print = 1;
 347         }
 348         if ((opt_trace_procname_field || opt_all_fields || opt_trace_default_fields)
 349                         && stream_class->trace->env.procname[0] != '\0') {
 350                 set_field_names_print(pos, ITEM_HEADER);
 351                 if (pos->print_names) {
 352                         fprintf(pos->fp, "trace:procname = ");
 353                 } else if (dom_print) {
 354                         fprintf(pos->fp, ":");
 355                 }
 356                 fprintf(pos->fp, "%s", stream_class->trace->env.procname);
 357                 if (pos->print_names)
 358                         fprintf(pos->fp, ", ");
 359                 dom_print = 1;
 360         }
 361         if ((opt_trace_vpid_field || opt_all_fields || opt_trace_default_fields)
 362                         && stream_class->trace->env.vpid != -1) {
 363                 set_field_names_print(pos, ITEM_HEADER);
 364                 if (pos->print_names) {
 365                         fprintf(pos->fp, "trace:vpid = ");
 366                 } else if (dom_print) {
 367                         fprintf(pos->fp, ":");
 368                 }
 369                 fprintf(pos->fp, "%d", stream_class->trace->env.vpid);
 370                 if (pos->print_names)
 371                         fprintf(pos->fp, ", ");
 372                 dom_print = 1;
 373         }
 374         if ((opt_loglevel_field || opt_all_fields) && event_class->loglevel != -1) {
 375                 set_field_names_print(pos, ITEM_HEADER);
 376                 if (pos->print_names) {
 377                         fprintf(pos->fp, "loglevel = ");
 378                 } else if (dom_print) {
 379                         fprintf(pos->fp, ":");
 380                 }
 381                 fprintf(pos->fp, "%s (%d)",
 382                         print_loglevel(event_class->loglevel),
 383                         event_class->loglevel);
 384                 if (pos->print_names)
 385                         fprintf(pos->fp, ", ");
 386                 dom_print = 1;
 387         }
 388         if ((opt_emf_field || opt_all_fields) && event_class->model_emf_uri) {
 389                 set_field_names_print(pos, ITEM_HEADER);
 390                 if (pos->print_names) {
 391                         fprintf(pos->fp, "model.emf.uri = ");
 392                 } else if (dom_print) {
 393                         fprintf(pos->fp, ":");
 394                 }
 395                 fprintf(pos->fp, "\"%s\"",
 396                         g_quark_to_string(event_class->model_emf_uri));
 397                 if (pos->print_names)
 398                         fprintf(pos->fp, ", ");
 399                 dom_print = 1;
 400         }
 401         if ((opt_callsite_field || opt_all_fields)) {
 402                 struct ctf_callsite_dups *cs_dups;
 403                 struct ctf_callsite *callsite;
 404
 405                 cs_dups = ctf_trace_callsite_lookup(stream_class->trace,
 406                                 event_class->name);
 407                 if (cs_dups) {
 408                         int i = 0;
 409
 410                         set_field_names_print(pos, ITEM_HEADER);
 411                         if (pos->print_names) {
 412                                 fprintf(pos->fp, "callsite = ");
 413                         } else if (dom_print) {
 414                                 fprintf(pos->fp, ":");
 415                         }
 416                         fprintf(pos->fp, "[");
 417                         bt_list_for_each_entry(callsite, &cs_dups->head, node) {
 418                                 if (i != 0)
 419                                         fprintf(pos->fp, ",");
 420                                 if (CTF_CALLSITE_FIELD_IS_SET(callsite, ip)) {
 421                                         fprintf(pos->fp, "%s@0x%" PRIx64 ":%s:%" PRIu64 "",
 422                                                 callsite->func, callsite->ip, callsite->file,
 423                                                 callsite->line);
 424                                 } else {
 425                                         fprintf(pos->fp, "%s:%s:%" PRIu64 "",
 426                                                 callsite->func, callsite->file,
 427                                                 callsite->line);
 428                                 }
 429                                 i++;
 430                         }
 431                         fprintf(pos->fp, "]");
 432                         if (pos->print_names)
 433                                 fprintf(pos->fp, ", ");
 434                         dom_print = 1;
 435                 }
 436         }
 437         if (dom_print && !pos->print_names)
 438                 fprintf(pos->fp, " ");
 439         set_field_names_print(pos, ITEM_HEADER);
 440         if (pos->print_names)
 441                 fprintf(pos->fp, "name = ");
 442         fprintf(pos->fp, "%s", g_quark_to_string(event_class->name));
 443         if (pos->print_names)
 444                 pos->field_nr++;
 445         else
 446                 fprintf(pos->fp, ":");
 447
 448         /* print cpuid field from packet context */
 449         if (stream->stream_packet_context) {
 450                 if (pos->field_nr++ != 0)
 451                         fprintf(pos->fp, ",");
 452                 set_field_names_print(pos, ITEM_SCOPE);
 453                 if (pos->print_names)
 454                         fprintf(pos->fp, " stream.packet.context =");
 455                 field_nr_saved = pos->field_nr;
 456                 pos->field_nr = 0;
 457                 set_field_names_print(pos, ITEM_CONTEXT);
 458                 ret = generic_rw(ppos, &stream->stream_packet_context->p);
 459                 if (ret)
 460                         goto error;
 461                 pos->field_nr = field_nr_saved;
 462         }
 463
 464         /* Only show the event header in verbose mode */
 465         if (babeltrace_verbose && stream->stream_event_header) {
 466                 if (pos->field_nr++ != 0)
 467                         fprintf(pos->fp, ",");
 468                 set_field_names_print(pos, ITEM_SCOPE);
 469                 if (pos->print_names)
 470                         fprintf(pos->fp, " stream.event.header =");
 471                 field_nr_saved = pos->field_nr;
 472                 pos->field_nr = 0;
 473                 set_field_names_print(pos, ITEM_CONTEXT);
 474                 ret = generic_rw(ppos, &stream->stream_event_header->p);
 475                 if (ret)
 476                         goto error;
 477                 pos->field_nr = field_nr_saved;
 478         }
 479
 480         /* print stream-declared event context */
 481         if (stream->stream_event_context) {
 482                 if (pos->field_nr++ != 0)
 483                         fprintf(pos->fp, ",");
 484                 set_field_names_print(pos, ITEM_SCOPE);
 485                 if (pos->print_names)
 486                         fprintf(pos->fp, " stream.event.context =");
 487                 field_nr_saved = pos->field_nr;
 488                 pos->field_nr = 0;
 489                 set_field_names_print(pos, ITEM_CONTEXT);
 490                 ret = generic_rw(ppos, &stream->stream_event_context->p);
 491                 if (ret)
 492                         goto error;
 493                 pos->field_nr = field_nr_saved;
 494         }
 495
 496         /* print event-declared event context */
 497         if (event->event_context) {
 498                 if (pos->field_nr++ != 0)
 499                         fprintf(pos->fp, ",");
 500                 set_field_names_print(pos, ITEM_SCOPE);
 501                 if (pos->print_names)
 502                         fprintf(pos->fp, " event.context =");
 503                 field_nr_saved = pos->field_nr;
 504                 pos->field_nr = 0;
 505                 set_field_names_print(pos, ITEM_CONTEXT);
 506                 ret = generic_rw(ppos, &event->event_context->p);
 507                 if (ret)
 508                         goto error;
 509                 pos->field_nr = field_nr_saved;
 510         }
 511
 512         /* Read and print event payload */
 513         if (event->event_fields) {
 514                 if (pos->field_nr++ != 0)
 515                         fprintf(pos->fp, ",");
 516                 set_field_names_print(pos, ITEM_SCOPE);
 517                 if (pos->print_names)
 518                         fprintf(pos->fp, " event.fields =");
 519                 field_nr_saved = pos->field_nr;
 520                 pos->field_nr = 0;
 521                 set_field_names_print(pos, ITEM_PAYLOAD);
 522                 ret = generic_rw(ppos, &event->event_fields->p);
 523                 if (ret)
 524                         goto error;
 525                 pos->field_nr = field_nr_saved;
 526         }
 527         /* newline */
 528         fprintf(pos->fp, "\n");
 529         pos->field_nr = 0;
 530
 531         return 0;
 532
 533 error:
 534         fprintf(stderr, "[error] Unexpected end of stream. Either the trace data stream is corrupted or metadata description does not match data layout.\n");
 535         return ret;
 536 }
 537
 538 static
 539 struct bt_trace_descriptor *ctf_text_open_trace(const char *path, int flags,
 540                 void (*packet_seek)(struct bt_stream_pos *pos, size_t index,
 541                         int whence), FILE *metadata_fp)
 542 {
 543         struct ctf_text_stream_pos *pos;
 544         FILE *fp;
 545
 546         pos = g_new0(struct ctf_text_stream_pos, 1);
 547
 548         pos->last_real_timestamp = -1ULL;
 549         pos->last_cycles_timestamp = -1ULL;
 550         switch (flags & O_ACCMODE) {
 551         case O_RDWR:
 552                 if (!path)
 553                         fp = stdout;
 554                 else
 555                         fp = fopen(path, "w");
 556                 if (!fp)
 557                         goto error;
 558                 pos->fp = fp;
 559                 pos->parent.rw_table = write_dispatch_table;
 560                 pos->parent.event_cb = ctf_text_write_event;
 561                 pos->parent.trace = &pos->trace_descriptor;
 562                 pos->print_names = 0;
 563                 babeltrace_ctf_console_output++;
 564                 break;
 565         case O_RDONLY:
 566         default:
 567                 fprintf(stderr, "[error] Incorrect open flags.\n");
 568                 goto error;
 569         }
 570
 571         return &pos->trace_descriptor;
 572 error:
 573         g_free(pos);
 574         return NULL;
 575 }
 576
 577 static
 578 int ctf_text_close_trace(struct bt_trace_descriptor *td)
 579 {
 580         int ret;
 581         struct ctf_text_stream_pos *pos =
 582                 container_of(td, struct ctf_text_stream_pos, trace_descriptor);
 583
 584         babeltrace_ctf_console_output--;
 585         if (pos->fp != stdout) {
 586                 ret = fclose(pos->fp);
 587                 if (ret) {
 588                         perror("Error on fclose");
 589                         return -1;
 590                 }
 591         }
 592         g_free(pos);
 593         return 0;
 594 }
 595
 596 static
 597 void __attribute__((constructor)) ctf_text_init(void)
 598 {
 599         int ret;
 600
 601         ctf_text_format.name = g_quark_from_static_string("text");
 602         ret = bt_register_format(&ctf_text_format);
 603         assert(!ret);
 604 }
 605
 606 static
 607 void __attribute__((destructor)) ctf_text_exit(void)
 608 {
 609         bt_unregister_format(&ctf_text_format);
 610 }