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 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 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 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 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         /* Print events discarded */
 266         if (stream->events_discarded) {
 267                 fflush(pos->fp);
 268                 fprintf(stderr, "[warning] Tracer discarded %" PRIu64 " events between [",
 269                         stream->events_discarded);
 270                 if (opt_clock_cycles) {
 271                         ctf_print_timestamp(stderr, stream,
 272                                         stream->prev_cycles_timestamp);
 273                         fprintf(stderr, "] and [");
 274                         ctf_print_timestamp(stderr, stream,
 275                                         stream->prev_cycles_timestamp_end);
 276                 } else {
 277                         ctf_print_timestamp(stderr, stream,
 278                                         stream->prev_real_timestamp);
 279                         fprintf(stderr, "] and [");
 280                         ctf_print_timestamp(stderr, stream,
 281                                         stream->prev_real_timestamp_end);
 282                 }
 283                 fprintf(stderr, "]. You should consider recording a new trace with larger buffers or with fewer events enabled.\n");
 284                 fflush(stderr);
 285                 stream->events_discarded = 0;
 286         }
 287
 288         if (stream->has_timestamp) {
 289                 set_field_names_print(pos, ITEM_HEADER);
 290                 if (pos->print_names)
 291                         fprintf(pos->fp, "timestamp = ");
 292                 else
 293                         fprintf(pos->fp, "[");
 294                 if (opt_clock_cycles) {
 295                         ctf_print_timestamp(pos->fp, stream, stream->cycles_timestamp);
 296                 } else {
 297                         ctf_print_timestamp(pos->fp, stream, stream->real_timestamp);
 298                 }
 299                 if (!pos->print_names)
 300                         fprintf(pos->fp, "]");
 301
 302                 if (pos->print_names)
 303                         fprintf(pos->fp, ", ");
 304                 else
 305                         fprintf(pos->fp, " ");
 306         }
 307         if ((opt_delta_field || opt_all_fields) && stream->has_timestamp) {
 308                 uint64_t delta, delta_sec, delta_nsec;
 309
 310                 set_field_names_print(pos, ITEM_HEADER);
 311                 if (pos->print_names)
 312                         fprintf(pos->fp, "delta = ");
 313                 else
 314                         fprintf(pos->fp, "(");
 315                 if (pos->last_real_timestamp != -1ULL) {
 316                         delta = stream->real_timestamp - pos->last_real_timestamp;
 317                         delta_sec = delta / NSEC_PER_SEC;
 318                         delta_nsec = delta % NSEC_PER_SEC;
 319                         fprintf(pos->fp, "+%" PRIu64 ".%09" PRIu64,
 320                                 delta_sec, delta_nsec);
 321                 } else {
 322                         fprintf(pos->fp, "+?.?????????");
 323                 }
 324                 if (!pos->print_names)
 325                         fprintf(pos->fp, ")");
 326
 327                 if (pos->print_names)
 328                         fprintf(pos->fp, ", ");
 329                 else
 330                         fprintf(pos->fp, " ");
 331                 pos->last_real_timestamp = stream->real_timestamp;
 332                 pos->last_cycles_timestamp = stream->cycles_timestamp;
 333         }
 334
 335         if ((opt_trace_field || opt_all_fields) && stream_class->trace->path[0] != '\0') {
 336                 set_field_names_print(pos, ITEM_HEADER);
 337                 if (pos->print_names) {
 338                         fprintf(pos->fp, "trace = ");
 339                 }
 340                 fprintf(pos->fp, "%s", stream_class->trace->path);
 341                 if (pos->print_names)
 342                         fprintf(pos->fp, ", ");
 343                 else
 344                         fprintf(pos->fp, " ");
 345         }
 346         if ((opt_trace_hostname_field || opt_all_fields || opt_trace_default_fields)
 347                         && stream_class->trace->env.hostname[0] != '\0') {
 348                 set_field_names_print(pos, ITEM_HEADER);
 349                 if (pos->print_names) {
 350                         fprintf(pos->fp, "trace:hostname = ");
 351                 }
 352                 fprintf(pos->fp, "%s", stream_class->trace->env.hostname);
 353                 if (pos->print_names)
 354                         fprintf(pos->fp, ", ");
 355                 dom_print = 1;
 356         }
 357         if ((opt_trace_domain_field || opt_all_fields) && stream_class->trace->env.domain[0] != '\0') {
 358                 set_field_names_print(pos, ITEM_HEADER);
 359                 if (pos->print_names) {
 360                         fprintf(pos->fp, "trace:domain = ");
 361                 }
 362                 fprintf(pos->fp, "%s", stream_class->trace->env.domain);
 363                 if (pos->print_names)
 364                         fprintf(pos->fp, ", ");
 365                 dom_print = 1;
 366         }
 367         if ((opt_trace_procname_field || opt_all_fields || opt_trace_default_fields)
 368                         && stream_class->trace->env.procname[0] != '\0') {
 369                 set_field_names_print(pos, ITEM_HEADER);
 370                 if (pos->print_names) {
 371                         fprintf(pos->fp, "trace:procname = ");
 372                 } else if (dom_print) {
 373                         fprintf(pos->fp, ":");
 374                 }
 375                 fprintf(pos->fp, "%s", stream_class->trace->env.procname);
 376                 if (pos->print_names)
 377                         fprintf(pos->fp, ", ");
 378                 dom_print = 1;
 379         }
 380         if ((opt_trace_vpid_field || opt_all_fields || opt_trace_default_fields)
 381                         && stream_class->trace->env.vpid != -1) {
 382                 set_field_names_print(pos, ITEM_HEADER);
 383                 if (pos->print_names) {
 384                         fprintf(pos->fp, "trace:vpid = ");
 385                 } else if (dom_print) {
 386                         fprintf(pos->fp, ":");
 387                 }
 388                 fprintf(pos->fp, "%d", stream_class->trace->env.vpid);
 389                 if (pos->print_names)
 390                         fprintf(pos->fp, ", ");
 391                 dom_print = 1;
 392         }
 393         if ((opt_loglevel_field || opt_all_fields) && event_class->loglevel != -1) {
 394                 set_field_names_print(pos, ITEM_HEADER);
 395                 if (pos->print_names) {
 396                         fprintf(pos->fp, "loglevel = ");
 397                 } else if (dom_print) {
 398                         fprintf(pos->fp, ":");
 399                 }
 400                 fprintf(pos->fp, "%s (%d)",
 401                         print_loglevel(event_class->loglevel),
 402                         event_class->loglevel);
 403                 if (pos->print_names)
 404                         fprintf(pos->fp, ", ");
 405                 dom_print = 1;
 406         }
 407         if ((opt_emf_field || opt_all_fields) && event_class->model_emf_uri) {
 408                 set_field_names_print(pos, ITEM_HEADER);
 409                 if (pos->print_names) {
 410                         fprintf(pos->fp, "model.emf.uri = ");
 411                 } else if (dom_print) {
 412                         fprintf(pos->fp, ":");
 413                 }
 414                 fprintf(pos->fp, "\"%s\"",
 415                         g_quark_to_string(event_class->model_emf_uri));
 416                 if (pos->print_names)
 417                         fprintf(pos->fp, ", ");
 418                 dom_print = 1;
 419         }
 420         if ((opt_callsite_field || opt_all_fields)) {
 421                 struct ctf_callsite_dups *cs_dups;
 422                 struct ctf_callsite *callsite;
 423
 424                 cs_dups = ctf_trace_callsite_lookup(stream_class->trace,
 425                                 event_class->name);
 426                 if (cs_dups) {
 427                         int i = 0;
 428
 429                         set_field_names_print(pos, ITEM_HEADER);
 430                         if (pos->print_names) {
 431                                 fprintf(pos->fp, "callsite = ");
 432                         } else if (dom_print) {
 433                                 fprintf(pos->fp, ":");
 434                         }
 435                         fprintf(pos->fp, "[");
 436                         bt_list_for_each_entry(callsite, &cs_dups->head, node) {
 437                                 if (i != 0)
 438                                         fprintf(pos->fp, ",");
 439                                 if (CTF_CALLSITE_FIELD_IS_SET(callsite, ip)) {
 440                                         fprintf(pos->fp, "%s@0x%" PRIx64 ":%s:%" PRIu64 "",
 441                                                 callsite->func, callsite->ip, callsite->file,
 442                                                 callsite->line);
 443                                 } else {
 444                                         fprintf(pos->fp, "%s:%s:%" PRIu64 "",
 445                                                 callsite->func, callsite->file,
 446                                                 callsite->line);
 447                                 }
 448                                 i++;
 449                         }
 450                         fprintf(pos->fp, "]");
 451                         if (pos->print_names)
 452                                 fprintf(pos->fp, ", ");
 453                         dom_print = 1;
 454                 }
 455         }
 456         if (dom_print && !pos->print_names)
 457                 fprintf(pos->fp, " ");
 458         set_field_names_print(pos, ITEM_HEADER);
 459         if (pos->print_names)
 460                 fprintf(pos->fp, "name = ");
 461         fprintf(pos->fp, "%s", g_quark_to_string(event_class->name));
 462         if (pos->print_names)
 463                 pos->field_nr++;
 464         else
 465                 fprintf(pos->fp, ":");
 466
 467         /* print cpuid field from packet context */
 468         if (stream->stream_packet_context) {
 469                 if (pos->field_nr++ != 0)
 470                         fprintf(pos->fp, ",");
 471                 set_field_names_print(pos, ITEM_SCOPE);
 472                 if (pos->print_names)
 473                         fprintf(pos->fp, " stream.packet.context =");
 474                 field_nr_saved = pos->field_nr;
 475                 pos->field_nr = 0;
 476                 set_field_names_print(pos, ITEM_CONTEXT);
 477                 ret = generic_rw(ppos, &stream->stream_packet_context->p);
 478                 if (ret)
 479                         goto error;
 480                 pos->field_nr = field_nr_saved;
 481         }
 482
 483         /* Only show the event header in verbose mode */
 484         if (babeltrace_verbose && stream->stream_event_header) {
 485                 if (pos->field_nr++ != 0)
 486                         fprintf(pos->fp, ",");
 487                 set_field_names_print(pos, ITEM_SCOPE);
 488                 if (pos->print_names)
 489                         fprintf(pos->fp, " stream.event.header =");
 490                 field_nr_saved = pos->field_nr;
 491                 pos->field_nr = 0;
 492                 set_field_names_print(pos, ITEM_CONTEXT);
 493                 ret = generic_rw(ppos, &stream->stream_event_header->p);
 494                 if (ret)
 495                         goto error;
 496                 pos->field_nr = field_nr_saved;
 497         }
 498
 499         /* print stream-declared event context */
 500         if (stream->stream_event_context) {
 501                 if (pos->field_nr++ != 0)
 502                         fprintf(pos->fp, ",");
 503                 set_field_names_print(pos, ITEM_SCOPE);
 504                 if (pos->print_names)
 505                         fprintf(pos->fp, " stream.event.context =");
 506                 field_nr_saved = pos->field_nr;
 507                 pos->field_nr = 0;
 508                 set_field_names_print(pos, ITEM_CONTEXT);
 509                 ret = generic_rw(ppos, &stream->stream_event_context->p);
 510                 if (ret)
 511                         goto error;
 512                 pos->field_nr = field_nr_saved;
 513         }
 514
 515         /* print event-declared event context */
 516         if (event->event_context) {
 517                 if (pos->field_nr++ != 0)
 518                         fprintf(pos->fp, ",");
 519                 set_field_names_print(pos, ITEM_SCOPE);
 520                 if (pos->print_names)
 521                         fprintf(pos->fp, " event.context =");
 522                 field_nr_saved = pos->field_nr;
 523                 pos->field_nr = 0;
 524                 set_field_names_print(pos, ITEM_CONTEXT);
 525                 ret = generic_rw(ppos, &event->event_context->p);
 526                 if (ret)
 527                         goto error;
 528                 pos->field_nr = field_nr_saved;
 529         }
 530
 531         /* Read and print event payload */
 532         if (event->event_fields) {
 533                 if (pos->field_nr++ != 0)
 534                         fprintf(pos->fp, ",");
 535                 set_field_names_print(pos, ITEM_SCOPE);
 536                 if (pos->print_names)
 537                         fprintf(pos->fp, " event.fields =");
 538                 field_nr_saved = pos->field_nr;
 539                 pos->field_nr = 0;
 540                 set_field_names_print(pos, ITEM_PAYLOAD);
 541                 ret = generic_rw(ppos, &event->event_fields->p);
 542                 if (ret)
 543                         goto error;
 544                 pos->field_nr = field_nr_saved;
 545         }
 546         /* newline */
 547         fprintf(pos->fp, "\n");
 548         pos->field_nr = 0;
 549
 550         return 0;
 551
 552 error:
 553         fprintf(stderr, "[error] Unexpected end of stream. Either the trace data stream is corrupted or metadata description does not match data layout.\n");
 554         return ret;
 555 }
 556
 557 static
 558 struct trace_descriptor *ctf_text_open_trace(const char *path, int flags,
 559                 void (*packet_seek)(struct bt_stream_pos *pos, size_t index,
 560                         int whence), FILE *metadata_fp)
 561 {
 562         struct ctf_text_stream_pos *pos;
 563         FILE *fp;
 564
 565         pos = g_new0(struct ctf_text_stream_pos, 1);
 566
 567         pos->last_real_timestamp = -1ULL;
 568         pos->last_cycles_timestamp = -1ULL;
 569         switch (flags & O_ACCMODE) {
 570         case O_RDWR:
 571                 if (!path)
 572                         fp = stdout;
 573                 else
 574                         fp = fopen(path, "w");
 575                 if (!fp)
 576                         goto error;
 577                 pos->fp = fp;
 578                 pos->parent.rw_table = write_dispatch_table;
 579                 pos->parent.event_cb = ctf_text_write_event;
 580                 pos->print_names = 0;
 581                 break;
 582         case O_RDONLY:
 583         default:
 584                 fprintf(stderr, "[error] Incorrect open flags.\n");
 585                 goto error;
 586         }
 587
 588         return &pos->trace_descriptor;
 589 error:
 590         g_free(pos);
 591         return NULL;
 592 }
 593
 594 static
 595 int ctf_text_close_trace(struct trace_descriptor *td)
 596 {
 597         int ret;
 598         struct ctf_text_stream_pos *pos =
 599                 container_of(td, struct ctf_text_stream_pos, trace_descriptor);
 600         ret = fclose(pos->fp);
 601         if (ret) {
 602                 perror("Error on fclose");
 603                 return -1;
 604         }
 605         g_free(pos);
 606         return 0;
 607 }
 608
 609 static
 610 void __attribute__((constructor)) ctf_text_init(void)
 611 {
 612         int ret;
 613
 614         ctf_text_format.name = g_quark_from_static_string("text");
 615         ret = bt_register_format(&ctf_text_format);
 616         assert(!ret);
 617 }
 618
 619 static
 620 void __attribute__((destructor)) ctf_text_exit(void)
 621 {
 622         bt_unregister_format(&ctf_text_format);
 623 }