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