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 <babeltrace/trace-debug-info.h>
  35 #include <inttypes.h>
  36 #include <sys/mman.h>
  37 #include <errno.h>
  38 #include <sys/types.h>
  39 #include <sys/stat.h>
  40 #include <fcntl.h>
  41 #include <dirent.h>
  42 #include <glib.h>
  43 #include <unistd.h>
  44 #include <stdlib.h>
  45
  46 #define NSEC_PER_SEC 1000000000ULL
  47
  48 int opt_all_field_names,
  49         opt_scope_field_names,
  50         opt_header_field_names,
  51         opt_context_field_names,
  52         opt_payload_field_names,
  53         opt_all_fields,
  54         opt_trace_field,
  55         opt_trace_domain_field,
  56         opt_trace_procname_field,
  57         opt_trace_vpid_field,
  58         opt_trace_hostname_field,
  59         opt_trace_default_fields = 1,
  60         opt_loglevel_field,
  61         opt_emf_field,
  62         opt_callsite_field,
  63         opt_delta_field = 1,
  64         opt_debug_info_full_path;
  65
  66 enum field_item {
  67         ITEM_SCOPE,
  68         ITEM_HEADER,
  69         ITEM_CONTEXT,
  70         ITEM_PAYLOAD,
  71 };
  72
  73 enum bt_loglevel {
  74         BT_LOGLEVEL_EMERG                  = 0,
  75         BT_LOGLEVEL_ALERT                  = 1,
  76         BT_LOGLEVEL_CRIT                   = 2,
  77         BT_LOGLEVEL_ERR                    = 3,
  78         BT_LOGLEVEL_WARNING                = 4,
  79         BT_LOGLEVEL_NOTICE                 = 5,
  80         BT_LOGLEVEL_INFO                   = 6,
  81         BT_LOGLEVEL_DEBUG_SYSTEM           = 7,
  82         BT_LOGLEVEL_DEBUG_PROGRAM          = 8,
  83         BT_LOGLEVEL_DEBUG_PROCESS          = 9,
  84         BT_LOGLEVEL_DEBUG_MODULE           = 10,
  85         BT_LOGLEVEL_DEBUG_UNIT             = 11,
  86         BT_LOGLEVEL_DEBUG_FUNCTION         = 12,
  87         BT_LOGLEVEL_DEBUG_LINE             = 13,
  88         BT_LOGLEVEL_DEBUG                  = 14,
  89 };
  90
  91 static
  92 struct bt_trace_descriptor *ctf_text_open_trace(const char *path, int flags,
  93                 void (*packet_seek)(struct bt_stream_pos *pos, size_t index,
  94                         int whence), FILE *metadata_fp);
  95 static
  96 int ctf_text_close_trace(struct bt_trace_descriptor *descriptor);
  97
  98 static
  99 rw_dispatch write_dispatch_table[] = {
 100         [ CTF_TYPE_INTEGER ] = ctf_text_integer_write,
 101         [ CTF_TYPE_FLOAT ] = ctf_text_float_write,
 102         [ CTF_TYPE_ENUM ] = ctf_text_enum_write,
 103         [ CTF_TYPE_STRING ] = ctf_text_string_write,
 104         [ CTF_TYPE_STRUCT ] = ctf_text_struct_write,
 105         [ CTF_TYPE_VARIANT ] = ctf_text_variant_write,
 106         [ CTF_TYPE_ARRAY ] = ctf_text_array_write,
 107         [ CTF_TYPE_SEQUENCE ] = ctf_text_sequence_write,
 108 };
 109
 110 static
 111 struct bt_format ctf_text_format = {
 112         .open_trace = ctf_text_open_trace,
 113         .close_trace = ctf_text_close_trace,
 114 };
 115
 116 static GQuark Q_STREAM_PACKET_CONTEXT_TIMESTAMP_BEGIN,
 117         Q_STREAM_PACKET_CONTEXT_TIMESTAMP_END,
 118         Q_STREAM_PACKET_CONTEXT_EVENTS_DISCARDED,
 119         Q_STREAM_PACKET_CONTEXT_CONTENT_SIZE,
 120         Q_STREAM_PACKET_CONTEXT_PACKET_SIZE,
 121         Q_STREAM_PACKET_CONTEXT_PACKET_SEQ_NUM;
 122
 123 static
 124 void __attribute__((constructor)) init_quarks(void)
 125 {
 126         Q_STREAM_PACKET_CONTEXT_TIMESTAMP_BEGIN = g_quark_from_static_string("stream.packet.context.timestamp_begin");
 127         Q_STREAM_PACKET_CONTEXT_TIMESTAMP_END = g_quark_from_static_string("stream.packet.context.timestamp_end");
 128         Q_STREAM_PACKET_CONTEXT_EVENTS_DISCARDED = g_quark_from_static_string("stream.packet.context.events_discarded");
 129         Q_STREAM_PACKET_CONTEXT_CONTENT_SIZE = g_quark_from_static_string("stream.packet.context.content_size");
 130         Q_STREAM_PACKET_CONTEXT_PACKET_SIZE = g_quark_from_static_string("stream.packet.context.packet_size");
 131         Q_STREAM_PACKET_CONTEXT_PACKET_SEQ_NUM = g_quark_from_static_string("stream.packet.context.packet_seq_num");
 132 }
 133
 134 static
 135 struct ctf_callsite_dups *ctf_trace_callsite_lookup(struct ctf_trace *trace,
 136                         GQuark callsite_name)
 137 {
 138         return g_hash_table_lookup(trace->callsites,
 139                         (gpointer) (unsigned long) callsite_name);
 140 }
 141
 142 int print_field(struct bt_definition *definition)
 143 {
 144         /* Print all fields in verbose mode */
 145         if (babeltrace_verbose)
 146                 return 1;
 147
 148         /* Filter out part of the packet context */
 149         if (definition->path == Q_STREAM_PACKET_CONTEXT_TIMESTAMP_BEGIN)
 150                 return 0;
 151         if (definition->path == Q_STREAM_PACKET_CONTEXT_TIMESTAMP_END)
 152                 return 0;
 153         if (definition->path == Q_STREAM_PACKET_CONTEXT_EVENTS_DISCARDED)
 154                 return 0;
 155         if (definition->path == Q_STREAM_PACKET_CONTEXT_CONTENT_SIZE)
 156                 return 0;
 157         if (definition->path == Q_STREAM_PACKET_CONTEXT_PACKET_SIZE)
 158                 return 0;
 159         if (definition->path == Q_STREAM_PACKET_CONTEXT_PACKET_SEQ_NUM)
 160                 return 0;
 161
 162         return 1;
 163 }
 164
 165 static
 166 void set_field_names_print(struct ctf_text_stream_pos *pos, enum field_item item)
 167 {
 168         switch (item) {
 169         case ITEM_SCOPE:
 170                 if (opt_all_field_names || opt_scope_field_names)
 171                         pos->print_names = 1;
 172                 else
 173                         pos->print_names = 0;
 174                 break;
 175         case ITEM_HEADER:
 176                 if (opt_all_field_names || opt_header_field_names)
 177                         pos->print_names = 1;
 178                 else
 179                         pos->print_names = 0;
 180                 break;
 181         case ITEM_CONTEXT:
 182                 if (opt_all_field_names || opt_context_field_names)
 183                         pos->print_names = 1;
 184                 else
 185                         pos->print_names = 0;
 186                 break;
 187         case ITEM_PAYLOAD:
 188                 if (opt_all_field_names || opt_payload_field_names)
 189                         pos->print_names = 1;
 190                 else
 191                         pos->print_names = 0;
 192
 193                 break;
 194         default:
 195                 assert(0);
 196         }
 197 }
 198
 199 static
 200 const char *print_loglevel(int value)
 201 {
 202         switch (value) {
 203         case -1:
 204                 return "";
 205         case BT_LOGLEVEL_EMERG:
 206                 return "TRACE_EMERG";
 207         case BT_LOGLEVEL_ALERT:
 208                 return "TRACE_ALERT";
 209         case BT_LOGLEVEL_CRIT:
 210                 return "TRACE_CRIT";
 211         case BT_LOGLEVEL_ERR:
 212                 return "TRACE_ERR";
 213         case BT_LOGLEVEL_WARNING:
 214                 return "TRACE_WARNING";
 215         case BT_LOGLEVEL_NOTICE:
 216                 return "TRACE_NOTICE";
 217         case BT_LOGLEVEL_INFO:
 218                 return "TRACE_INFO";
 219         case BT_LOGLEVEL_DEBUG_SYSTEM:
 220                 return "TRACE_DEBUG_SYSTEM";
 221         case BT_LOGLEVEL_DEBUG_PROGRAM:
 222                 return "TRACE_DEBUG_PROGRAM";
 223         case BT_LOGLEVEL_DEBUG_PROCESS:
 224                 return "TRACE_DEBUG_PROCESS";
 225         case BT_LOGLEVEL_DEBUG_MODULE:
 226                 return "TRACE_DEBUG_MODULE";
 227         case BT_LOGLEVEL_DEBUG_UNIT:
 228                 return "TRACE_DEBUG_UNIT";
 229         case BT_LOGLEVEL_DEBUG_FUNCTION:
 230                 return "TRACE_DEBUG_FUNCTION";
 231         case BT_LOGLEVEL_DEBUG_LINE:
 232                 return "TRACE_DEBUG_LINE";
 233         case BT_LOGLEVEL_DEBUG:
 234                 return "TRACE_DEBUG";
 235         default:
 236                 return "<<UNKNOWN>>";
 237         }
 238 }
 239
 240 static
 241 int ctf_text_write_event(struct bt_stream_pos *ppos, struct ctf_stream_definition *stream)
 242 {
 243         struct ctf_text_stream_pos *pos =
 244                 container_of(ppos, struct ctf_text_stream_pos, parent);
 245         struct ctf_stream_declaration *stream_class = stream->stream_class;
 246         int field_nr_saved;
 247         struct ctf_event_declaration *event_class;
 248         struct ctf_event_definition *event;
 249         uint64_t id;
 250         int ret;
 251         int dom_print = 0;
 252
 253         id = stream->event_id;
 254
 255         if (id >= stream_class->events_by_id->len) {
 256                 fprintf(stderr, "[error] Event id %" PRIu64 " is outside range.\n", id);
 257                 return -EINVAL;
 258         }
 259         event = g_ptr_array_index(stream->events_by_id, id);
 260         if (!event) {
 261                 fprintf(stderr, "[error] Event id %" PRIu64 " is unknown.\n", id);
 262                 return -EINVAL;
 263         }
 264         event_class = g_ptr_array_index(stream_class->events_by_id, id);
 265         if (!event_class) {
 266                 fprintf(stderr, "[error] Event class id %" PRIu64 " is unknown.\n", id);
 267                 return -EINVAL;
 268         }
 269
 270         handle_debug_info_event(stream_class, event);
 271
 272         if (stream->has_timestamp) {
 273                 set_field_names_print(pos, ITEM_HEADER);
 274                 if (pos->print_names)
 275                         fprintf(pos->fp, "timestamp = ");
 276                 else
 277                         fprintf(pos->fp, "[");
 278                 if (opt_clock_cycles) {
 279                         ctf_print_timestamp(pos->fp, stream, stream->cycles_timestamp);
 280                 } else {
 281                         ctf_print_timestamp(pos->fp, stream, stream->real_timestamp);
 282                 }
 283                 if (!pos->print_names)
 284                         fprintf(pos->fp, "]");
 285
 286                 if (pos->print_names)
 287                         fprintf(pos->fp, ", ");
 288                 else
 289                         fprintf(pos->fp, " ");
 290         }
 291         if (opt_delta_field && stream->has_timestamp) {
 292                 uint64_t delta, delta_sec, delta_nsec;
 293
 294                 set_field_names_print(pos, ITEM_HEADER);
 295                 if (pos->print_names)
 296                         fprintf(pos->fp, "delta = ");
 297                 else
 298                         fprintf(pos->fp, "(");
 299                 if (pos->last_real_timestamp != -1ULL) {
 300                         delta = stream->real_timestamp - pos->last_real_timestamp;
 301                         delta_sec = delta / NSEC_PER_SEC;
 302                         delta_nsec = delta % NSEC_PER_SEC;
 303                         fprintf(pos->fp, "+%" PRIu64 ".%09" PRIu64,
 304                                 delta_sec, delta_nsec);
 305                 } else {
 306                         fprintf(pos->fp, "+?.?????????");
 307                 }
 308                 if (!pos->print_names)
 309                         fprintf(pos->fp, ")");
 310
 311                 if (pos->print_names)
 312                         fprintf(pos->fp, ", ");
 313                 else
 314                         fprintf(pos->fp, " ");
 315                 pos->last_real_timestamp = stream->real_timestamp;
 316                 pos->last_cycles_timestamp = stream->cycles_timestamp;
 317         }
 318
 319         if ((opt_trace_field || opt_all_fields) && stream_class->trace->parent.path[0] != '\0') {
 320                 set_field_names_print(pos, ITEM_HEADER);
 321                 if (pos->print_names) {
 322                         fprintf(pos->fp, "trace = ");
 323                 }
 324                 fprintf(pos->fp, "%s", stream_class->trace->parent.path);
 325                 if (pos->print_names)
 326                         fprintf(pos->fp, ", ");
 327                 else
 328                         fprintf(pos->fp, " ");
 329         }
 330         if ((opt_trace_hostname_field || opt_all_fields || opt_trace_default_fields)
 331                         && stream_class->trace->env.hostname[0] != '\0') {
 332                 set_field_names_print(pos, ITEM_HEADER);
 333                 if (pos->print_names) {
 334                         fprintf(pos->fp, "trace:hostname = ");
 335                 }
 336                 fprintf(pos->fp, "%s", stream_class->trace->env.hostname);
 337                 if (pos->print_names)
 338                         fprintf(pos->fp, ", ");
 339                 dom_print = 1;
 340         }
 341         if ((opt_trace_domain_field || opt_all_fields) && stream_class->trace->env.domain[0] != '\0') {
 342                 set_field_names_print(pos, ITEM_HEADER);
 343                 if (pos->print_names) {
 344                         fprintf(pos->fp, "trace:domain = ");
 345                 } else if (dom_print) {
 346                         fprintf(pos->fp, ":");
 347                 }
 348                 fprintf(pos->fp, "%s", stream_class->trace->env.domain);
 349                 if (pos->print_names)
 350                         fprintf(pos->fp, ", ");
 351                 dom_print = 1;
 352         }
 353         if ((opt_trace_procname_field || opt_all_fields || opt_trace_default_fields)
 354                         && stream_class->trace->env.procname[0] != '\0') {
 355                 set_field_names_print(pos, ITEM_HEADER);
 356                 if (pos->print_names) {
 357                         fprintf(pos->fp, "trace:procname = ");
 358                 } else if (dom_print) {
 359                         fprintf(pos->fp, ":");
 360                 }
 361                 fprintf(pos->fp, "%s", stream_class->trace->env.procname);
 362                 if (pos->print_names)
 363                         fprintf(pos->fp, ", ");
 364                 dom_print = 1;
 365         }
 366         if ((opt_trace_vpid_field || opt_all_fields || opt_trace_default_fields)
 367                         && stream_class->trace->env.vpid != -1) {
 368                 set_field_names_print(pos, ITEM_HEADER);
 369                 if (pos->print_names) {
 370                         fprintf(pos->fp, "trace:vpid = ");
 371                 } else if (dom_print) {
 372                         fprintf(pos->fp, ":");
 373                 }
 374                 fprintf(pos->fp, "%d", stream_class->trace->env.vpid);
 375                 if (pos->print_names)
 376                         fprintf(pos->fp, ", ");
 377                 dom_print = 1;
 378         }
 379         if ((opt_loglevel_field || opt_all_fields) && event_class->loglevel != -1) {
 380                 set_field_names_print(pos, ITEM_HEADER);
 381                 if (pos->print_names) {
 382                         fprintf(pos->fp, "loglevel = ");
 383                 } else if (dom_print) {
 384                         fprintf(pos->fp, ":");
 385                 }
 386                 fprintf(pos->fp, "%s (%d)",
 387                         print_loglevel(event_class->loglevel),
 388                         event_class->loglevel);
 389                 if (pos->print_names)
 390                         fprintf(pos->fp, ", ");
 391                 dom_print = 1;
 392         }
 393         if ((opt_emf_field || opt_all_fields) && event_class->model_emf_uri) {
 394                 set_field_names_print(pos, ITEM_HEADER);
 395                 if (pos->print_names) {
 396                         fprintf(pos->fp, "model.emf.uri = ");
 397                 } else if (dom_print) {
 398                         fprintf(pos->fp, ":");
 399                 }
 400                 fprintf(pos->fp, "\"%s\"",
 401                         g_quark_to_string(event_class->model_emf_uri));
 402                 if (pos->print_names)
 403                         fprintf(pos->fp, ", ");
 404                 dom_print = 1;
 405         }
 406         if ((opt_callsite_field || opt_all_fields)) {
 407                 struct ctf_callsite_dups *cs_dups;
 408                 struct ctf_callsite *callsite;
 409
 410                 cs_dups = ctf_trace_callsite_lookup(stream_class->trace,
 411                                 event_class->name);
 412                 if (cs_dups) {
 413                         int i = 0;
 414
 415                         set_field_names_print(pos, ITEM_HEADER);
 416                         if (pos->print_names) {
 417                                 fprintf(pos->fp, "callsite = ");
 418                         } else if (dom_print) {
 419                                 fprintf(pos->fp, ":");
 420                         }
 421                         fprintf(pos->fp, "[");
 422                         bt_list_for_each_entry(callsite, &cs_dups->head, node) {
 423                                 if (i != 0)
 424                                         fprintf(pos->fp, ",");
 425                                 if (CTF_CALLSITE_FIELD_IS_SET(callsite, ip)) {
 426                                         fprintf(pos->fp, "%s@0x%" PRIx64 ":%s:%" PRIu64 "",
 427                                                 callsite->func, callsite->ip, callsite->file,
 428                                                 callsite->line);
 429                                 } else {
 430                                         fprintf(pos->fp, "%s:%s:%" PRIu64 "",
 431                                                 callsite->func, callsite->file,
 432                                                 callsite->line);
 433                                 }
 434                                 i++;
 435                         }
 436                         fprintf(pos->fp, "]");
 437                         if (pos->print_names)
 438                                 fprintf(pos->fp, ", ");
 439                         dom_print = 1;
 440                 }
 441         }
 442         if (dom_print && !pos->print_names)
 443                 fprintf(pos->fp, " ");
 444         set_field_names_print(pos, ITEM_HEADER);
 445         if (pos->print_names)
 446                 fprintf(pos->fp, "name = ");
 447         fprintf(pos->fp, "%s", g_quark_to_string(event_class->name));
 448         if (pos->print_names)
 449                 pos->field_nr++;
 450         else
 451                 fprintf(pos->fp, ":");
 452
 453         /* print cpuid field from packet context */
 454         if (stream->stream_packet_context) {
 455                 if (pos->field_nr++ != 0)
 456                         fprintf(pos->fp, ",");
 457                 set_field_names_print(pos, ITEM_SCOPE);
 458                 if (pos->print_names)
 459                         fprintf(pos->fp, " stream.packet.context =");
 460                 field_nr_saved = pos->field_nr;
 461                 pos->field_nr = 0;
 462                 set_field_names_print(pos, ITEM_CONTEXT);
 463                 ret = generic_rw(ppos, &stream->stream_packet_context->p);
 464                 if (ret)
 465                         goto error;
 466                 pos->field_nr = field_nr_saved;
 467         }
 468
 469         /* Only show the event header in verbose mode */
 470         if (babeltrace_verbose && stream->stream_event_header) {
 471                 if (pos->field_nr++ != 0)
 472                         fprintf(pos->fp, ",");
 473                 set_field_names_print(pos, ITEM_SCOPE);
 474                 if (pos->print_names)
 475                         fprintf(pos->fp, " stream.event.header =");
 476                 field_nr_saved = pos->field_nr;
 477                 pos->field_nr = 0;
 478                 set_field_names_print(pos, ITEM_CONTEXT);
 479                 ret = generic_rw(ppos, &stream->stream_event_header->p);
 480                 if (ret)
 481                         goto error;
 482                 pos->field_nr = field_nr_saved;
 483         }
 484
 485         /* print stream-declared event context */
 486         if (stream->stream_event_context) {
 487                 if (pos->field_nr++ != 0)
 488                         fprintf(pos->fp, ",");
 489                 set_field_names_print(pos, ITEM_SCOPE);
 490                 if (pos->print_names)
 491                         fprintf(pos->fp, " stream.event.context =");
 492                 field_nr_saved = pos->field_nr;
 493                 pos->field_nr = 0;
 494                 set_field_names_print(pos, ITEM_CONTEXT);
 495                 ret = generic_rw(ppos, &stream->stream_event_context->p);
 496                 if (ret)
 497                         goto error;
 498                 pos->field_nr = field_nr_saved;
 499         }
 500
 501         /* print event-declared event context */
 502         if (event->event_context) {
 503                 if (pos->field_nr++ != 0)
 504                         fprintf(pos->fp, ",");
 505                 set_field_names_print(pos, ITEM_SCOPE);
 506                 if (pos->print_names)
 507                         fprintf(pos->fp, " event.context =");
 508                 field_nr_saved = pos->field_nr;
 509                 pos->field_nr = 0;
 510                 set_field_names_print(pos, ITEM_CONTEXT);
 511                 ret = generic_rw(ppos, &event->event_context->p);
 512                 if (ret)
 513                         goto error;
 514                 pos->field_nr = field_nr_saved;
 515         }
 516
 517         /* Read and print event payload */
 518         if (event->event_fields) {
 519                 if (pos->field_nr++ != 0)
 520                         fprintf(pos->fp, ",");
 521                 set_field_names_print(pos, ITEM_SCOPE);
 522                 if (pos->print_names)
 523                         fprintf(pos->fp, " event.fields =");
 524                 field_nr_saved = pos->field_nr;
 525                 pos->field_nr = 0;
 526                 set_field_names_print(pos, ITEM_PAYLOAD);
 527                 ret = generic_rw(ppos, &event->event_fields->p);
 528                 if (ret)
 529                         goto error;
 530                 pos->field_nr = field_nr_saved;
 531         }
 532         /* newline */
 533         fprintf(pos->fp, "\n");
 534         pos->field_nr = 0;
 535
 536         return 0;
 537
 538 error:
 539         fprintf(stderr, "[error] Unexpected end of stream. Either the trace data stream is corrupted or metadata description does not match data layout.\n");
 540         return ret;
 541 }
 542
 543 static
 544 struct bt_trace_descriptor *ctf_text_open_trace(const char *path, int flags,
 545                 void (*packet_seek)(struct bt_stream_pos *pos, size_t index,
 546                         int whence), FILE *metadata_fp)
 547 {
 548         struct ctf_text_stream_pos *pos;
 549         FILE *fp;
 550
 551         pos = g_new0(struct ctf_text_stream_pos, 1);
 552         if (!pos) {
 553                 goto error;
 554         }
 555         init_trace_descriptor(&pos->trace_descriptor);
 556
 557         pos->last_real_timestamp = -1ULL;
 558         pos->last_cycles_timestamp = -1ULL;
 559         switch (flags & O_ACCMODE) {
 560         case O_RDWR:
 561                 if (!path)
 562                         fp = stdout;
 563                 else
 564                         fp = fopen(path, "w");
 565                 if (!fp)
 566                         goto error;
 567                 pos->fp = fp;
 568                 pos->parent.rw_table = write_dispatch_table;
 569                 pos->parent.event_cb = ctf_text_write_event;
 570                 pos->parent.trace = &pos->trace_descriptor;
 571                 pos->print_names = 0;
 572                 babeltrace_ctf_console_output++;
 573                 break;
 574         case O_RDONLY:
 575         default:
 576                 fprintf(stderr, "[error] Incorrect open flags.\n");
 577                 goto error;
 578         }
 579
 580         return &pos->trace_descriptor;
 581 error:
 582         g_free(pos);
 583         return NULL;
 584 }
 585
 586 static
 587 int ctf_text_close_trace(struct bt_trace_descriptor *td)
 588 {
 589         int ret;
 590         struct ctf_text_stream_pos *pos =
 591                 container_of(td, struct ctf_text_stream_pos, trace_descriptor);
 592
 593         babeltrace_ctf_console_output--;
 594         if (pos->fp != stdout) {
 595                 ret = fclose(pos->fp);
 596                 if (ret) {
 597                         perror("Error on fclose");
 598                         return -1;
 599                 }
 600         }
 601         g_free(pos);
 602         return 0;
 603 }
 604
 605 static
 606 void __attribute__((constructor)) ctf_text_init(void)
 607 {
 608         int ret;
 609
 610         ctf_text_format.name = g_quark_from_static_string("text");
 611         ret = bt_register_format(&ctf_text_format);
 612         assert(!ret);
 613 }
 614
 615 static
 616 void __attribute__((destructor)) ctf_text_exit(void)
 617 {
 618         bt_unregister_format(&ctf_text_format);
 619 }