converter/babeltrace.c

   1 /*
   2  * babeltrace.c
   3  *
   4  * Babeltrace Trace Converter
   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
  21 #define _XOPEN_SOURCE 700
  22 #include <config.h>
  23 #include <babeltrace/babeltrace.h>
  24 #include <babeltrace/format.h>
  25 #include <babeltrace/context.h>
  26 #include <babeltrace/ctf/types.h>
  27 #include <babeltrace/ctf-text/types.h>
  28 #include <babeltrace/iterator.h>
  29 #include <popt.h>
  30 #include <errno.h>
  31 #include <stdlib.h>
  32 #include <ctype.h>
  33 #include <sys/stat.h>
  34 #include <sys/types.h>
  35 #include <fcntl.h>
  36 #include <ftw.h>
  37 #include <dirent.h>
  38 #include <unistd.h>
  39 #include <inttypes.h>
  40
  41 #include <babeltrace/ctf-ir/metadata.h> /* for clocks */
  42
  43 #define DEFAULT_FILE_ARRAY_SIZE 1
  44 static char *opt_input_format;
  45 static char *opt_output_format;
  46
  47 static const char *opt_input_path;
  48 static const char *opt_output_path;
  49
  50 static struct trace_collection trace_collection_read;
  51 static struct format *fmt_read;
  52
  53 void strlower(char *str)
  54 {
  55         while (*str) {
  56                 *str = tolower(*str);
  57                 str++;
  58         }
  59 }
  60
  61 enum {
  62         OPT_NONE = 0,
  63         OPT_HELP,
  64         OPT_LIST,
  65         OPT_VERBOSE,
  66         OPT_DEBUG,
  67         OPT_NAMES,
  68         OPT_FIELDS,
  69         OPT_NO_DELTA,
  70         OPT_CLOCK_OFFSET,
  71         OPT_CLOCK_RAW,
  72         OPT_CLOCK_SECONDS,
  73         OPT_CLOCK_DATE,
  74         OPT_CLOCK_GMT,
  75 };
  76
  77 static struct poptOption long_options[] = {
  78         /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
  79         { "input-format", 'i', POPT_ARG_STRING, &opt_input_format, OPT_NONE, NULL, NULL },
  80         { "output-format", 'o', POPT_ARG_STRING, &opt_output_format, OPT_NONE, NULL, NULL },
  81         { "help", 'h', POPT_ARG_NONE, NULL, OPT_HELP, NULL, NULL },
  82         { "list", 'l', POPT_ARG_NONE, NULL, OPT_LIST, NULL, NULL },
  83         { "verbose", 'v', POPT_ARG_NONE, NULL, OPT_VERBOSE, NULL, NULL },
  84         { "debug", 'd', POPT_ARG_NONE, NULL, OPT_DEBUG, NULL, NULL },
  85         { "names", 'n', POPT_ARG_STRING, NULL, OPT_NAMES, NULL, NULL },
  86         { "fields", 'f', POPT_ARG_STRING, NULL, OPT_FIELDS, NULL, NULL },
  87         { "no-delta", 0, POPT_ARG_NONE, NULL, OPT_NO_DELTA, NULL, NULL },
  88         { "clock-offset", 0, POPT_ARG_STRING, NULL, OPT_CLOCK_OFFSET, NULL, NULL },
  89         { "clock-raw", 0, POPT_ARG_NONE, NULL, OPT_CLOCK_RAW, NULL, NULL },
  90         { "clock-seconds", 0, POPT_ARG_NONE, NULL, OPT_CLOCK_SECONDS, NULL, NULL },
  91         { "clock-date", 0, POPT_ARG_NONE, NULL, OPT_CLOCK_DATE, NULL, NULL },
  92         { "clock-gmt", 0, POPT_ARG_NONE, NULL, OPT_CLOCK_GMT, NULL, NULL },
  93         { NULL, 0, 0, NULL, 0, NULL, NULL },
  94 };
  95
  96 static void list_formats(FILE *fp)
  97 {
  98         fprintf(fp, "\n");
  99         bt_fprintf_format_list(fp);
 100 }
 101
 102 static void usage(FILE *fp)
 103 {
 104         fprintf(fp, "BabelTrace Trace Converter %s\n\n", VERSION);
 105         fprintf(fp, "usage : babeltrace [OPTIONS] INPUT <OUTPUT>\n");
 106         fprintf(fp, "\n");
 107         fprintf(fp, "  INPUT                          Input trace path\n");
 108         fprintf(fp, "  OUTPUT                         Output trace path (default: stdout)\n");
 109         fprintf(fp, "\n");
 110         fprintf(fp, "  -i, --input-format FORMAT      Input trace format (default: ctf)\n");
 111         fprintf(fp, "  -o, --output-format FORMAT     Output trace format (default: text)\n");
 112         fprintf(fp, "\n");
 113         fprintf(fp, "  -h, --help                     This help message\n");
 114         fprintf(fp, "  -l, --list                     List available formats\n");
 115         fprintf(fp, "  -v, --verbose                  Verbose mode\n");
 116         fprintf(fp, "                                 (or set BABELTRACE_VERBOSE environment variable)\n");
 117         fprintf(fp, "  -d, --debug                    Debug mode\n");
 118         fprintf(fp, "                                 (or set BABELTRACE_DEBUG environment variable)\n");
 119         fprintf(fp, "      --no-delta                 Do not print time delta between consecutive events\n");
 120         fprintf(fp, "  -n, --names name1<,name2,...>  Print field names:\n");
 121         fprintf(fp, "                                     (payload OR args OR arg)\n");
 122         fprintf(fp, "                                     all, scope, header, (context OR ctx)\n");
 123         fprintf(fp, "                                        (payload active by default)\n");
 124         fprintf(fp, "  -f, --fields name1<,name2,...> Print additional fields:\n");
 125         fprintf(fp, "                                     all, trace, trace:domain, trace:procname,\n");
 126         fprintf(fp, "                                     trace:vpid, loglevel.\n");
 127         fprintf(fp, "      --clock-raw                Disregard internal clock offset (use raw value)\n");
 128         fprintf(fp, "      --clock-offset seconds     Clock offset in seconds\n");
 129         fprintf(fp, "      --clock-seconds            Print the timestamps as [sec.ns]\n");
 130         fprintf(fp, "                                 (default is: [hh:mm:ss.ns])\n");
 131         fprintf(fp, "      --clock-date               Print clock date\n");
 132         fprintf(fp, "      --clock-gmt                Print clock in GMT time zone (default: local time zone)\n");
 133         list_formats(fp);
 134         fprintf(fp, "\n");
 135 }
 136
 137 static int get_names_args(poptContext *pc)
 138 {
 139         char *str, *strlist, *strctx;
 140
 141         opt_payload_field_names = 0;
 142         strlist = (char *) poptGetOptArg(*pc);
 143         if (!strlist) {
 144                 return -EINVAL;
 145         }
 146         str = strtok_r(strlist, ",", &strctx);
 147         do {
 148                 if (!strcmp(str, "all"))
 149                         opt_all_field_names = 1;
 150                 else if (!strcmp(str, "scope"))
 151                         opt_scope_field_names = 1;
 152                 else if (!strcmp(str, "context") || !strcmp(str, "ctx"))
 153                         opt_context_field_names = 1;
 154                 else if (!strcmp(str, "header"))
 155                         opt_header_field_names = 1;
 156                 else if (!strcmp(str, "payload") || !strcmp(str, "args") || !strcmp(str, "arg"))
 157                         opt_payload_field_names = 1;
 158                 else {
 159                         fprintf(stderr, "[error] unknown field name type %s\n", str);
 160                         return -EINVAL;
 161                 }
 162         } while ((str = strtok_r(NULL, ",", &strctx)));
 163         return 0;
 164 }
 165
 166 static int get_fields_args(poptContext *pc)
 167 {
 168         char *str, *strlist, *strctx;
 169
 170         opt_payload_field_names = 0;
 171         strlist = (char *) poptGetOptArg(*pc);
 172         if (!strlist) {
 173                 return -EINVAL;
 174         }
 175         str = strtok_r(strlist, ",", &strctx);
 176         do {
 177                 if (!strcmp(str, "all"))
 178                         opt_all_fields = 1;
 179                 else if (!strcmp(str, "trace"))
 180                         opt_trace_field = 1;
 181                 else if (!strcmp(str, "trace:domain"))
 182                         opt_trace_domain_field = 1;
 183                 else if (!strcmp(str, "trace:procname"))
 184                         opt_trace_procname_field = 1;
 185                 else if (!strcmp(str, "trace:vpid"))
 186                         opt_trace_vpid_field = 1;
 187                 else if (!strcmp(str, "loglevel"))
 188                         opt_loglevel_field = 1;
 189                 else {
 190                         fprintf(stderr, "[error] unknown field type %s\n", str);
 191                         return -EINVAL;
 192                 }
 193         } while ((str = strtok_r(NULL, ",", &strctx)));
 194         return 0;
 195 }
 196
 197 /*
 198  * Return 0 if caller should continue, < 0 if caller should return
 199  * error, > 0 if caller should exit without reporting error.
 200  */
 201 static int parse_options(int argc, char **argv)
 202 {
 203         poptContext pc;
 204         int opt, ret = 0;
 205
 206         if (argc == 1) {
 207                 usage(stdout);
 208                 return 1;       /* exit cleanly */
 209         }
 210
 211         pc = poptGetContext(NULL, argc, (const char **) argv, long_options, 0);
 212         poptReadDefaultConfig(pc, 0);
 213
 214         /* set default */
 215         opt_payload_field_names = 1;
 216
 217         while ((opt = poptGetNextOpt(pc)) != -1) {
 218                 switch (opt) {
 219                 case OPT_HELP:
 220                         usage(stdout);
 221                         ret = 1;        /* exit cleanly */
 222                         goto end;
 223                 case OPT_LIST:
 224                         list_formats(stdout);
 225                         ret = 1;
 226                         goto end;
 227                 case OPT_VERBOSE:
 228                         babeltrace_verbose = 1;
 229                         break;
 230                 case OPT_NAMES:
 231                         if (get_names_args(&pc)) {
 232                                 ret = -EINVAL;
 233                                 goto end;
 234                         }
 235                         break;
 236                 case OPT_FIELDS:
 237                         if (get_fields_args(&pc)) {
 238                                 ret = -EINVAL;
 239                                 goto end;
 240                         }
 241                         break;
 242                 case OPT_DEBUG:
 243                         babeltrace_debug = 1;
 244                         break;
 245                 case OPT_NO_DELTA:
 246                         opt_delta_field = 0;
 247                         break;
 248                 case OPT_CLOCK_RAW:
 249                         opt_clock_raw = 1;
 250                         break;
 251                 case OPT_CLOCK_OFFSET:
 252                 {
 253                         char *str, *endptr;
 254
 255                         str = poptGetOptArg(pc);
 256                         if (!str) {
 257                                 fprintf(stderr, "[error] Missing --clock-offset argument\n");
 258                                 ret = -EINVAL;
 259                                 goto end;
 260                         }
 261                         errno = 0;
 262                         opt_clock_offset = strtoull(str, &endptr, 0);
 263                         if (*endptr != '\0' || str == endptr || errno != 0) {
 264                                 fprintf(stderr, "[error] Incorrect --clock-offset argument: %s\n", str);
 265                                 ret = -EINVAL;
 266                                 goto end;
 267                         }
 268                         break;
 269                 }
 270                 case OPT_CLOCK_SECONDS:
 271                         opt_clock_seconds = 1;
 272                         break;
 273                 case OPT_CLOCK_DATE:
 274                         opt_clock_date = 1;
 275                         break;
 276                 case OPT_CLOCK_GMT:
 277                         opt_clock_gmt = 1;
 278                         break;
 279
 280                 default:
 281                         ret = -EINVAL;
 282                         goto end;
 283                 }
 284         }
 285
 286         opt_input_path = poptGetArg(pc);
 287         if (!opt_input_path) {
 288                 ret = -EINVAL;
 289                 goto end;
 290         }
 291         opt_output_path = poptGetArg(pc);
 292
 293 end:
 294         if (pc) {
 295                 poptFreeContext(pc);
 296         }
 297         return ret;
 298 }
 299
 300 static void init_trace_collection(struct trace_collection *tc)
 301 {
 302         tc->array = g_ptr_array_sized_new(DEFAULT_FILE_ARRAY_SIZE);
 303         tc->clocks = g_hash_table_new(g_direct_hash, g_direct_equal);
 304 }
 305
 306 /*
 307  * finalize_trace_collection() closes the opened traces for read
 308  * and free the memory allocated for trace collection
 309  */
 310 static void finalize_trace_collection(struct trace_collection *tc)
 311 {
 312         int i;
 313
 314         for (i = 0; i < tc->array->len; i++) {
 315                 struct trace_descriptor *temp =
 316                         g_ptr_array_index(tc->array, i);
 317                 fmt_read->close_trace(temp);
 318         }
 319         g_ptr_array_free(tc->array, TRUE);
 320         g_hash_table_destroy(tc->clocks);
 321 }
 322
 323 struct clock_match {
 324         GHashTable *clocks;
 325         struct ctf_clock *clock_match;
 326         struct trace_collection *tc;
 327 };
 328
 329 static void check_clock_match(gpointer key, gpointer value, gpointer user_data)
 330 {
 331         struct clock_match *match = user_data;
 332         struct ctf_clock *clock_a = value, *clock_b;
 333
 334         if (clock_a->uuid != 0) {
 335                 /*
 336                  * Lookup the the trace clocks into the collection
 337                  * clocks.
 338                  */
 339                 clock_b = g_hash_table_lookup(match->clocks,
 340                         (gpointer) (unsigned long) clock_a->uuid);
 341                 if (clock_b) {
 342                         match->clock_match = clock_b;
 343                         return;
 344                 }
 345         } else if (clock_a->absolute) {
 346                 /*
 347                  * Absolute time references, such as NTP, are looked up
 348                  * by clock name.
 349                  */
 350                 clock_b = g_hash_table_lookup(match->clocks,
 351                         (gpointer) (unsigned long) clock_a->name);
 352                 if (clock_b) {
 353                         match->clock_match = clock_b;
 354                         return;
 355                 }
 356         }
 357 }
 358
 359 static void clock_add(gpointer key, gpointer value, gpointer user_data)
 360 {
 361         struct clock_match *clock_match = user_data;
 362         GHashTable *tc_clocks = clock_match->clocks;
 363         struct ctf_clock *t_clock = value;
 364         GQuark v;
 365
 366         if (t_clock->absolute)
 367                 v = t_clock->name;
 368         else
 369                 v = t_clock->uuid;
 370         if (v) {
 371                 struct ctf_clock *tc_clock;
 372
 373                 tc_clock = g_hash_table_lookup(tc_clocks,
 374                                 (gpointer) (unsigned long) v);
 375                 if (!tc_clock) {
 376                         /*
 377                          * For now, we only support CTF that has one
 378                          * single clock.
 379                          */
 380                         if (g_hash_table_size(tc_clocks) > 0) {
 381                                 fprintf(stderr, "[error] Only CTF traces with a single clock description are supported by this babeltrace version.\n");
 382                         }
 383                         if (!clock_match->tc->single_clock) {
 384                                 clock_match->tc->single_clock = value;
 385                         }
 386                         g_hash_table_insert(tc_clocks,
 387                                 (gpointer) (unsigned long) v,
 388                                 value);
 389                 } else {
 390                         int64_t diff_ns;
 391
 392                         /*
 393                          * Check that the offsets match. If not, warn
 394                          * the user that we do an arbitrary choice.
 395                          */
 396                         diff_ns = tc_clock->offset_s;
 397                         diff_ns -= t_clock->offset_s;
 398                         diff_ns *= 1000000000ULL;
 399                         diff_ns += tc_clock->offset;
 400                         diff_ns -= t_clock->offset;
 401                         printf_debug("Clock \"%s\" offset between traces has a delta of %" PRIu64 " ns.",
 402                                 g_quark_to_string(tc_clock->name),
 403                                 diff_ns < 0 ? -diff_ns : diff_ns);
 404                         if (diff_ns > 10000) {
 405                                 fprintf(stderr, "[warning] Clock \"%s\" offset differs between traces (delta %" PRIu64 " ns). Choosing one arbitrarily.\n",
 406                                         g_quark_to_string(tc_clock->name),
 407                                         diff_ns < 0 ? -diff_ns : diff_ns);
 408                         }
 409                 }
 410         }
 411 }
 412
 413 /*
 414  * Whenever we add a trace to the trace collection, check that we can
 415  * correlate this trace with at least one other clock in the trace.
 416  */
 417 static int trace_collection_add(struct trace_collection *tc,
 418                                 struct trace_descriptor *td)
 419 {
 420         struct ctf_trace *trace = container_of(td, struct ctf_trace, parent);
 421
 422         g_ptr_array_add(tc->array, td);
 423         trace->collection = tc;
 424
 425         if (tc->array->len > 1) {
 426                 struct clock_match clock_match = {
 427                         .clocks = tc->clocks,
 428                         .clock_match = NULL,
 429                         .tc = NULL,
 430                 };
 431
 432                 /*
 433                  * With two or more traces, we need correlation info
 434                  * avalable.
 435                  */
 436                 g_hash_table_foreach(trace->clocks,
 437                                 check_clock_match,
 438                                 &clock_match);
 439                 if (!clock_match.clock_match) {
 440                         fprintf(stderr, "[error] No clocks can be correlated and multiple traces are added to the collection.\n");
 441                         goto error;
 442                 }
 443         }
 444
 445         {
 446                 struct clock_match clock_match = {
 447                         .clocks = tc->clocks,
 448                         .clock_match = NULL,
 449                         .tc = tc,
 450                 };
 451
 452                 /*
 453                  * Add each clock from the trace clocks into the trace
 454                  * collection clocks.
 455                  */
 456                 g_hash_table_foreach(trace->clocks,
 457                                 clock_add,
 458                                 &clock_match);
 459         }
 460         return 0;
 461 error:
 462         return -EPERM;
 463 }
 464
 465 int convert_trace(struct trace_descriptor *td_write,
 466                   struct bt_context *ctx)
 467 {
 468         struct babeltrace_iter *iter;
 469         struct ctf_stream *stream;
 470         struct ctf_stream_event *event;
 471         struct ctf_text_stream_pos *sout;
 472         struct trace_collection_pos begin_pos;
 473         int ret;
 474
 475         sout = container_of(td_write, struct ctf_text_stream_pos,
 476                         trace_descriptor);
 477
 478         begin_pos.type = BT_SEEK_BEGIN;
 479         iter = babeltrace_iter_create(ctx, &begin_pos, NULL);
 480         if (!iter) {
 481                 ret = -1;
 482                 goto error_iter;
 483         }
 484         while (babeltrace_iter_read_event(iter, &stream, &event) == 0) {
 485                 ret = sout->parent.event_cb(&sout->parent, stream);
 486                 if (ret) {
 487                         fprintf(stderr, "[error] Writing event failed.\n");
 488                         goto end;
 489                 }
 490                 ret = babeltrace_iter_next(iter);
 491                 if (ret < 0)
 492                         goto end;
 493         }
 494         ret = 0;
 495
 496 end:
 497         babeltrace_iter_destroy(iter);
 498 error_iter:
 499         return ret;
 500 }
 501
 502
 503 /*
 504  * traverse_dir() is the callback functiion for File Tree Walk (nftw).
 505  * it receives the path of the current entry (file, dir, link..etc) with
 506  * a flag to indicate the type of the entry.
 507  * if the entry being visited is a directory and contains a metadata file,
 508  * then open it for reading and save a trace_descriptor to that directory
 509  * in the read trace collection.
 510  */
 511 static int traverse_dir(const char *fpath, const struct stat *sb,
 512                         int tflag, struct FTW *ftwbuf)
 513 {
 514         int dirfd;
 515         int fd;
 516         struct trace_descriptor *td_read;
 517         int ret;
 518
 519         if (tflag != FTW_D)
 520                 return 0;
 521         dirfd = open(fpath, 0);
 522         if (dirfd < 0) {
 523                 fprintf(stderr, "[error] unable to open trace "
 524                         "directory file descriptor.\n");
 525                 return -1;
 526         }
 527         fd = openat(dirfd, "metadata", O_RDONLY);
 528         if (fd < 0) {
 529                 close(dirfd);
 530         } else {
 531                 close(fd);
 532                 close(dirfd);
 533                 td_read = fmt_read->open_trace(opt_input_path,
 534                                 fpath, O_RDONLY, ctf_move_pos_slow,
 535                                 NULL);
 536                 if (!td_read) {
 537                         fprintf(stderr, "Error opening trace \"%s\" "
 538                                         "for reading.\n\n", fpath);
 539                         return -1;      /* error */
 540                 }
 541                 ret = trace_collection_add(&trace_collection_read, td_read);
 542                 if (ret) {
 543                         return -1;
 544                 }
 545         }
 546         return 0;       /* success */
 547 }
 548
 549 int main(int argc, char **argv)
 550 {
 551         int ret;
 552         struct format *fmt_write;
 553         struct trace_descriptor *td_write;
 554         struct bt_context *ctx;
 555
 556         ret = parse_options(argc, argv);
 557         if (ret < 0) {
 558                 fprintf(stderr, "Error parsing options.\n\n");
 559                 usage(stderr);
 560                 exit(EXIT_FAILURE);
 561         } else if (ret > 0) {
 562                 exit(EXIT_SUCCESS);
 563         }
 564         printf_verbose("Verbose mode active.\n");
 565         printf_debug("Debug mode active.\n");
 566
 567         if (opt_input_format)
 568                 strlower(opt_input_format);
 569         if (opt_output_format)
 570                 strlower(opt_output_format);
 571
 572         printf_verbose("Converting from directory: %s\n", opt_input_path);
 573         printf_verbose("Converting from format: %s\n",
 574                 opt_input_format ? : "ctf <default>");
 575         printf_verbose("Converting to directory: %s\n",
 576                 opt_output_path ? : "<stdout>");
 577         printf_verbose("Converting to format: %s\n",
 578                 opt_output_format ? : "text <default>");
 579
 580         if (!opt_input_format)
 581                 opt_input_format = "ctf";
 582         if (!opt_output_format)
 583                 opt_output_format = "text";
 584         fmt_read = bt_lookup_format(g_quark_from_static_string(opt_input_format));
 585         if (!fmt_read) {
 586                 fprintf(stderr, "[error] Format \"%s\" is not supported.\n\n",
 587                         opt_input_format);
 588                 exit(EXIT_FAILURE);
 589         }
 590         fmt_write = bt_lookup_format(g_quark_from_static_string(opt_output_format));
 591         if (!fmt_write) {
 592                 fprintf(stderr, "[error] format \"%s\" is not supported.\n\n",
 593                         opt_output_format);
 594                 exit(EXIT_FAILURE);
 595         }
 596
 597         /*
 598          * pass the input path to nftw() .
 599          * specify traverse_dir() as the callback function.
 600          * depth = 10 which is the max number of file descriptors
 601          * that nftw() can open at a given time.
 602          * flags = 0  check nftw documentation for more info .
 603          */
 604         init_trace_collection(&trace_collection_read);
 605         ret = nftw(opt_input_path, traverse_dir, 10, 0);
 606         if (ret != 0) {
 607                 fprintf(stderr, "[error] opening trace \"%s\" for reading.\n\n",
 608                         opt_input_path);
 609                 goto error_td_read;
 610         }
 611         if (trace_collection_read.array->len == 0) {
 612                 fprintf(stderr, "[warning] no metadata file was found."
 613                                                 " no output was generated\n");
 614                 return 0;
 615         }
 616         ctx = bt_context_create(&trace_collection_read);
 617         if (!ctx) {
 618                 fprintf(stderr, "Error allocating a new context\n");
 619                 goto error_td_read;
 620         }
 621         td_write = fmt_write->open_trace(NULL, opt_output_path, O_RDWR, NULL, NULL);
 622         if (!td_write) {
 623                 fprintf(stderr, "Error opening trace \"%s\" for writing.\n\n",
 624                         opt_output_path ? : "<none>");
 625                 goto error_td_write;
 626         }
 627
 628         ret = convert_trace(td_write, ctx);
 629         if (ret) {
 630                 fprintf(stderr, "Error printing trace.\n\n");
 631                 goto error_copy_trace;
 632         }
 633
 634         fmt_write->close_trace(td_write);
 635         finalize_trace_collection(&trace_collection_read);
 636         bt_context_destroy(ctx);
 637         printf_verbose("finished converting. Output written to:\n%s\n",
 638                         opt_output_path ? : "<stdout>");
 639         exit(EXIT_SUCCESS);
 640
 641         /* Error handling */
 642 error_copy_trace:
 643         fmt_write->close_trace(td_write);
 644 error_td_write:
 645         finalize_trace_collection(&trace_collection_read);
 646 error_td_read:
 647         exit(EXIT_FAILURE);
 648 }