lib/ctf-writer/stream.c

   1 /*
   2  * Copyright 2013, 2014 Jérémie Galarneau <jeremie.galarneau@efficios.com>
   3  * Copyright 2017-2018 Philippe Proulx <pproulx@efficios.com>
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a copy
   6  * of this software and associated documentation files (the "Software"), to deal
   7  * in the Software without restriction, including without limitation the rights
   8  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   9  * copies of the Software, and to permit persons to whom the Software is
  10  * furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be included in
  13  * all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  18  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  20  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  21  * SOFTWARE.
  22  */
  23
  24 #define BT_LOG_TAG "CTF-WRITER-STREAM"
  25 #include <babeltrace2/lib-logging-internal.h>
  26
  27 #include <babeltrace2/assert-pre-internal.h>
  28 #include <babeltrace2/align-internal.h>
  29 #include <babeltrace2/assert-internal.h>
  30 #include <babeltrace2/compiler-internal.h>
  31 #include <babeltrace2/ctf-writer/event-class-internal.h>
  32 #include <babeltrace2/ctf-writer/event-internal.h>
  33 #include <babeltrace2/ctf-writer/field-types.h>
  34 #include <babeltrace2/ctf-writer/fields-internal.h>
  35 #include <babeltrace2/ctf-writer/stream-class-internal.h>
  36 #include <babeltrace2/ctf-writer/stream-class.h>
  37 #include <babeltrace2/ctf-writer/stream-internal.h>
  38 #include <babeltrace2/ctf-writer/stream.h>
  39 #include <babeltrace2/ctf-writer/trace-internal.h>
  40 #include <babeltrace2/ctf-writer/trace.h>
  41 #include <babeltrace2/ctf-writer/writer-internal.h>
  42 #include <babeltrace2/ctf-writer/object.h>
  43 #include <babeltrace2/ctfser-internal.h>
  44 #include <inttypes.h>
  45 #include <stdint.h>
  46 #include <unistd.h>
  47
  48 BT_HIDDEN
  49 void bt_ctf_stream_common_finalize(struct bt_ctf_stream_common *stream)
  50 {
  51         BT_LOGD("Finalizing common stream object: addr=%p, name=\"%s\"",
  52                 stream, bt_ctf_stream_common_get_name(stream));
  53
  54         if (stream->name) {
  55                 g_string_free(stream->name, TRUE);
  56         }
  57 }
  58
  59 BT_HIDDEN
  60 int bt_ctf_stream_common_initialize(
  61                 struct bt_ctf_stream_common *stream,
  62                 struct bt_ctf_stream_class_common *stream_class, const char *name,
  63                 uint64_t id, bt_ctf_object_release_func release_func)
  64 {
  65         int ret = 0;
  66         struct bt_ctf_trace_common *trace = NULL;
  67
  68         bt_ctf_object_init_shared_with_parent(&stream->base, release_func);
  69
  70         if (!stream_class) {
  71                 BT_LOGW_STR("Invalid parameter: stream class is NULL.");
  72                 goto error;
  73         }
  74
  75         BT_LOGD("Initializing common stream object: stream-class-addr=%p, "
  76                 "stream-class-name=\"%s\", stream-name=\"%s\", "
  77                 "stream-id=%" PRIu64,
  78                 stream_class, bt_ctf_stream_class_common_get_name(stream_class),
  79                 name, id);
  80         trace = bt_ctf_stream_class_common_borrow_trace(stream_class);
  81         if (!trace) {
  82                 BT_LOGW("Invalid parameter: cannot create stream from a stream class which is not part of trace: "
  83                         "stream-class-addr=%p, stream-class-name=\"%s\", "
  84                         "stream-name=\"%s\"",
  85                         stream_class,
  86                         bt_ctf_stream_class_common_get_name(stream_class), name);
  87                 goto error;
  88         }
  89
  90         if (id != -1ULL) {
  91                 /*
  92                  * Validate that the given ID is unique amongst all the
  93                  * existing trace's streams created from the same stream
  94                  * class.
  95                  */
  96                 size_t i;
  97
  98                 for (i = 0; i < trace->streams->len; i++) {
  99                         struct bt_ctf_stream_common *trace_stream =
 100                                 g_ptr_array_index(trace->streams, i);
 101
 102                         if (trace_stream->stream_class != (void *) stream_class) {
 103                                 continue;
 104                         }
 105
 106                         if (trace_stream->id == id) {
 107                                 BT_LOGW_STR("Invalid parameter: another stream in the same trace already has this ID.");
 108                                 goto error;
 109                         }
 110                 }
 111         }
 112
 113         /*
 114          * Acquire reference to parent since stream will become publicly
 115          * reachable; it needs its parent to remain valid.
 116          */
 117         bt_ctf_object_set_parent(&stream->base, &trace->base);
 118         stream->stream_class = stream_class;
 119         stream->id = (int64_t) id;
 120
 121         if (name) {
 122                 stream->name = g_string_new(name);
 123                 if (!stream->name) {
 124                         BT_LOGE_STR("Failed to allocate a GString.");
 125                         goto error;
 126                 }
 127         }
 128
 129         BT_LOGD("Set common stream's trace parent: trace-addr=%p", trace);
 130
 131         /* Add this stream to the trace's streams */
 132         BT_LOGD("Created common stream object: addr=%p", stream);
 133         goto end;
 134
 135 error:
 136         ret = -1;
 137
 138 end:
 139         return ret;
 140 }
 141
 142 static
 143 void bt_ctf_stream_destroy(struct bt_ctf_object *obj);
 144
 145 static
 146 int try_set_structure_field_integer(struct bt_ctf_field *, char *, uint64_t);
 147
 148 static
 149 int set_integer_field_value(struct bt_ctf_field* field, uint64_t value)
 150 {
 151         int ret = 0;
 152         struct bt_ctf_field_type *field_type = NULL;
 153
 154         if (!field) {
 155                 BT_LOGW_STR("Invalid parameter: field is NULL.");
 156                 ret = -1;
 157                 goto end;
 158         }
 159
 160         field_type = bt_ctf_field_get_type(field);
 161         BT_ASSERT(field_type);
 162
 163         if (bt_ctf_field_type_get_type_id(field_type) !=
 164                         BT_CTF_FIELD_TYPE_ID_INTEGER) {
 165                 /* Not an integer and the value is unset, error. */
 166                 BT_LOGW("Invalid parameter: field's type is not an integer field type: "
 167                         "field-addr=%p, ft-addr=%p, ft-id=%s",
 168                         field, field_type,
 169                         bt_ctf_field_type_id_string((int)
 170                                 bt_ctf_field_type_get_type_id(field_type)));
 171                 ret = -1;
 172                 goto end;
 173         }
 174
 175         if (bt_ctf_field_type_integer_is_signed(field_type)) {
 176                 ret = bt_ctf_field_integer_signed_set_value(field, (int64_t) value);
 177                 if (ret) {
 178                         /* Value is out of range, error. */
 179                         BT_LOGW("Cannot set signed integer field's value: "
 180                                 "addr=%p, value=%" PRId64,
 181                                 field, (int64_t) value);
 182                         goto end;
 183                 }
 184         } else {
 185                 ret = bt_ctf_field_integer_unsigned_set_value(field, value);
 186                 if (ret) {
 187                         /* Value is out of range, error. */
 188                         BT_LOGW("Cannot set unsigned integer field's value: "
 189                                 "addr=%p, value=%" PRIu64,
 190                                 field, value);
 191                         goto end;
 192                 }
 193         }
 194 end:
 195         bt_ctf_object_put_ref(field_type);
 196         return ret;
 197 }
 198
 199 static
 200 int set_packet_header_magic(struct bt_ctf_stream *stream)
 201 {
 202         int ret = 0;
 203         struct bt_ctf_field *magic_field = bt_ctf_field_structure_get_field_by_name(
 204                 stream->packet_header, "magic");
 205         const uint32_t magic_value = 0xc1fc1fc1;
 206
 207         BT_ASSERT(stream);
 208
 209         if (!magic_field) {
 210                 /* No magic field found. Not an error, skip. */
 211                 BT_LOGV("No field named `magic` in packet header: skipping: "
 212                         "stream-addr=%p, stream-name=\"%s\"",
 213                         stream, bt_ctf_stream_get_name(stream));
 214                 goto end;
 215         }
 216
 217         ret = bt_ctf_field_integer_unsigned_set_value(magic_field,
 218                 (uint64_t) magic_value);
 219
 220         if (ret) {
 221                 BT_LOGW("Cannot set packet header field's `magic` integer field's value: "
 222                         "stream-addr=%p, stream-name=\"%s\", field-addr=%p, value=%" PRIu64,
 223                         stream, bt_ctf_stream_get_name(stream),
 224                         magic_field, (uint64_t) magic_value);
 225         } else {
 226                 BT_LOGV("Set packet header field's `magic` field's value: "
 227                         "stream-addr=%p, stream-name=\"%s\", field-addr=%p, value=%" PRIu64,
 228                         stream, bt_ctf_stream_get_name(stream),
 229                         magic_field, (uint64_t) magic_value);
 230         }
 231 end:
 232         bt_ctf_object_put_ref(magic_field);
 233         return ret;
 234 }
 235
 236 static
 237 int set_packet_header_uuid(struct bt_ctf_stream *stream)
 238 {
 239         int ret = 0;
 240         int64_t i;
 241         struct bt_ctf_trace *trace = NULL;
 242         struct bt_ctf_field *uuid_field = bt_ctf_field_structure_get_field_by_name(
 243                 stream->packet_header, "uuid");
 244
 245         BT_ASSERT(stream);
 246
 247         if (!uuid_field) {
 248                 /* No uuid field found. Not an error, skip. */
 249                 BT_LOGV("No field named `uuid` in packet header: skipping: "
 250                         "stream-addr=%p, stream-name=\"%s\"",
 251                         stream, bt_ctf_stream_get_name(stream));
 252                 goto end;
 253         }
 254
 255         trace = (struct bt_ctf_trace *)
 256                 bt_ctf_object_get_parent(&stream->common.base);
 257
 258         for (i = 0; i < 16; i++) {
 259                 struct bt_ctf_field *uuid_element =
 260                         bt_ctf_field_array_get_field(uuid_field, i);
 261
 262                 ret = bt_ctf_field_integer_unsigned_set_value(
 263                         uuid_element, (uint64_t) trace->common.uuid[i]);
 264                 bt_ctf_object_put_ref(uuid_element);
 265                 if (ret) {
 266                         BT_LOGW("Cannot set integer field's value (for `uuid` packet header field): "
 267                                 "stream-addr=%p, stream-name=\"%s\", field-addr=%p, "
 268                                 "value=%" PRIu64 ", index=%" PRId64,
 269                                 stream, bt_ctf_stream_get_name(stream),
 270                                 uuid_element, (uint64_t) trace->common.uuid[i], i);
 271                         goto end;
 272                 }
 273         }
 274
 275         BT_LOGV("Set packet header field's `uuid` field's value: "
 276                 "stream-addr=%p, stream-name=\"%s\", field-addr=%p",
 277                 stream, bt_ctf_stream_get_name(stream), uuid_field);
 278
 279 end:
 280         bt_ctf_object_put_ref(uuid_field);
 281         BT_CTF_OBJECT_PUT_REF_AND_RESET(trace);
 282         return ret;
 283 }
 284 static
 285 int set_packet_header_stream_id(struct bt_ctf_stream *stream)
 286 {
 287         int ret = 0;
 288         uint32_t stream_id;
 289         struct bt_ctf_field *stream_id_field =
 290                 bt_ctf_field_structure_get_field_by_name(
 291                         stream->packet_header, "stream_id");
 292
 293         if (!stream_id_field) {
 294                 /* No stream_id field found. Not an error, skip. */
 295                 BT_LOGV("No field named `stream_id` in packet header: skipping: "
 296                         "stream-addr=%p, stream-name=\"%s\"",
 297                         stream, bt_ctf_stream_get_name(stream));
 298                 goto end;
 299         }
 300
 301         stream_id = stream->common.stream_class->id;
 302         ret = bt_ctf_field_integer_unsigned_set_value(stream_id_field,
 303                 (uint64_t) stream_id);
 304         if (ret) {
 305                 BT_LOGW("Cannot set packet header field's `stream_id` integer field's value: "
 306                         "stream-addr=%p, stream-name=\"%s\", field-addr=%p, value=%" PRIu64,
 307                         stream, bt_ctf_stream_get_name(stream),
 308                         stream_id_field, (uint64_t) stream_id);
 309         } else {
 310                 BT_LOGV("Set packet header field's `stream_id` field's value: "
 311                         "stream-addr=%p, stream-name=\"%s\", field-addr=%p, value=%" PRIu64,
 312                         stream, bt_ctf_stream_get_name(stream),
 313                         stream_id_field, (uint64_t) stream_id);
 314         }
 315
 316 end:
 317         bt_ctf_object_put_ref(stream_id_field);
 318         return ret;
 319 }
 320
 321 static
 322 int auto_populate_packet_header(struct bt_ctf_stream *stream)
 323 {
 324         int ret = 0;
 325
 326         if (!stream->packet_header) {
 327                 goto end;
 328         }
 329
 330         ret = set_packet_header_magic(stream);
 331         if (ret) {
 332                 BT_LOGW("Cannot set packet header's magic number field: "
 333                         "stream-addr=%p, stream-name=\"%s\"",
 334                         stream, bt_ctf_stream_get_name(stream));
 335                 goto end;
 336         }
 337
 338         ret = set_packet_header_uuid(stream);
 339         if (ret) {
 340                 BT_LOGW("Cannot set packet header's UUID field: "
 341                         "stream-addr=%p, stream-name=\"%s\"",
 342                         stream, bt_ctf_stream_get_name(stream));
 343                 goto end;
 344         }
 345
 346         ret = set_packet_header_stream_id(stream);
 347         if (ret) {
 348                 BT_LOGW("Cannot set packet header's stream class ID field: "
 349                         "stream-addr=%p, stream-name=\"%s\"",
 350                         stream, bt_ctf_stream_get_name(stream));
 351                 goto end;
 352         }
 353
 354         BT_LOGV("Automatically populated stream's packet header's known fields: "
 355                 "stream-addr=%p, stream-name=\"%s\"",
 356                 stream, bt_ctf_stream_get_name(stream));
 357
 358 end:
 359         return ret;
 360 }
 361
 362 static
 363 int set_packet_context_packet_size(struct bt_ctf_stream *stream,
 364                 uint64_t packet_size_bits)
 365 {
 366         int ret = 0;
 367         struct bt_ctf_field *field = bt_ctf_field_structure_get_field_by_name(
 368                 stream->packet_context, "packet_size");
 369
 370         ret = bt_ctf_field_integer_unsigned_set_value(field, packet_size_bits);
 371         if (ret) {
 372                 BT_LOGW("Cannot set packet context field's `packet_size` integer field's value: "
 373                         "stream-addr=%p, stream-name=\"%s\", field-addr=%p, value=%" PRIu64,
 374                         stream, bt_ctf_stream_get_name(stream),
 375                         field, packet_size_bits);
 376         } else {
 377                 BT_LOGV("Set packet context field's `packet_size` field's value: "
 378                         "stream-addr=%p, stream-name=\"%s\", field-addr=%p, value=%" PRIu64,
 379                         stream, bt_ctf_stream_get_name(stream),
 380                         field, packet_size_bits);
 381         }
 382
 383         bt_ctf_object_put_ref(field);
 384         return ret;
 385 }
 386
 387 static
 388 int set_packet_context_content_size(struct bt_ctf_stream *stream,
 389                 uint64_t content_size_bits)
 390 {
 391         int ret = 0;
 392         struct bt_ctf_field *field = bt_ctf_field_structure_get_field_by_name(
 393                 stream->packet_context, "content_size");
 394
 395         BT_ASSERT(stream);
 396
 397         if (!field) {
 398                 /* No content size field found. Not an error, skip. */
 399                 BT_LOGV("No field named `content_size` in packet context: skipping: "
 400                         "stream-addr=%p, stream-name=\"%s\"",
 401                         stream, bt_ctf_stream_get_name(stream));
 402                 goto end;
 403         }
 404
 405         ret = bt_ctf_field_integer_unsigned_set_value(field, content_size_bits);
 406         if (ret) {
 407                 BT_LOGW("Cannot set packet context field's `content_size` integer field's value: "
 408                         "stream-addr=%p, stream-name=\"%s\", field-addr=%p, value=%" PRIu64,
 409                         stream, bt_ctf_stream_get_name(stream),
 410                         field, content_size_bits);
 411         } else {
 412                 BT_LOGV("Set packet context field's `content_size` field's value: "
 413                         "stream-addr=%p, stream-name=\"%s\", field-addr=%p, value=%" PRIu64,
 414                         stream, bt_ctf_stream_get_name(stream),
 415                         field, content_size_bits);
 416         }
 417
 418 end:
 419         bt_ctf_object_put_ref(field);
 420         return ret;
 421 }
 422
 423 static
 424 int set_packet_context_events_discarded(struct bt_ctf_stream *stream)
 425 {
 426         int ret = 0;
 427         struct bt_ctf_field *field = bt_ctf_field_structure_get_field_by_name(
 428                 stream->packet_context, "events_discarded");
 429
 430         BT_ASSERT(stream);
 431
 432         if (!field) {
 433                 /* No discarded events count field found. Not an error, skip. */
 434                 BT_LOGV("No field named `events_discarded` in packet context: skipping: "
 435                         "stream-addr=%p, stream-name=\"%s\"",
 436                         stream, bt_ctf_stream_get_name(stream));
 437                 goto end;
 438         }
 439
 440         /*
 441          * If the field is set by the user, make sure that the value is
 442          * greater than or equal to the stream's current count of
 443          * discarded events. We do not allow wrapping here. If it's
 444          * valid, update the stream's current count.
 445          */
 446         if (bt_ctf_field_is_set_recursive(field)) {
 447                 uint64_t user_val;
 448
 449                 ret = bt_ctf_field_integer_unsigned_get_value(field,
 450                         &user_val);
 451                 if (ret) {
 452                         BT_LOGW("Cannot get packet context `events_discarded` field's unsigned value: "
 453                                 "stream-addr=%p, stream-name=\"%s\", field-addr=%p",
 454                                 stream, bt_ctf_stream_get_name(stream), field);
 455                         goto end;
 456                 }
 457
 458                 if (user_val < stream->discarded_events) {
 459                         BT_LOGW("Invalid packet context `events_discarded` field's unsigned value: "
 460                                 "value is lesser than the stream's current discarded events count: "
 461                                 "stream-addr=%p, stream-name=\"%s\", field-addr=%p, "
 462                                 "value=%" PRIu64 ", "
 463                                 "stream-discarded-events-count=%" PRIu64,
 464                                 stream, bt_ctf_stream_get_name(stream), field,
 465                                 user_val, stream->discarded_events);
 466                         goto end;
 467                 }
 468
 469                 stream->discarded_events = user_val;
 470         } else {
 471                 ret = bt_ctf_field_integer_unsigned_set_value(field,
 472                         stream->discarded_events);
 473                 if (ret) {
 474                         BT_LOGW("Cannot set packet context field's `events_discarded` integer field's value: "
 475                                 "stream-addr=%p, stream-name=\"%s\", field-addr=%p, value=%" PRIu64,
 476                                 stream, bt_ctf_stream_get_name(stream),
 477                                 field, stream->discarded_events);
 478                 } else {
 479                         BT_LOGV("Set packet context field's `events_discarded` field's value: "
 480                                 "stream-addr=%p, stream-name=\"%s\", field-addr=%p, value=%" PRIu64,
 481                                 stream, bt_ctf_stream_get_name(stream),
 482                                 field, stream->discarded_events);
 483                 }
 484         }
 485
 486 end:
 487         bt_ctf_object_put_ref(field);
 488         return ret;
 489 }
 490
 491 static
 492 void update_clock_value(uint64_t *val, uint64_t new_val,
 493                 unsigned int new_val_size)
 494 {
 495         const uint64_t pow2 = 1ULL << new_val_size;
 496         const uint64_t mask = pow2 - 1;
 497         uint64_t val_masked;
 498
 499 #ifdef BT_LOG_ENABLED_VERBOSE
 500         uint64_t old_val = *val;
 501 #endif
 502
 503         if (new_val_size == 64) {
 504                 *val = new_val;
 505                 goto end;
 506         }
 507
 508         val_masked = *val & mask;
 509
 510         if (new_val < val_masked) {
 511                 /* Wrapped once */
 512                 new_val |= pow2;
 513         }
 514
 515         *val &= ~mask;
 516         *val |= new_val;
 517
 518 end:
 519         BT_LOGV("Updated clock value: old-val=%" PRIu64 ", new-val=%" PRIu64,
 520                 old_val, *val);
 521         return;
 522 }
 523
 524 static
 525 int visit_field_update_clock_value(struct bt_ctf_field *field, uint64_t *val)
 526 {
 527         int ret = 0;
 528         struct bt_ctf_field_common *field_common = (void *) field;
 529
 530         if (!field) {
 531                 goto end;
 532         }
 533
 534         switch (bt_ctf_field_get_type_id(field)) {
 535         case BT_CTF_FIELD_TYPE_ID_INTEGER:
 536         {
 537                 struct bt_ctf_clock_class *cc =
 538                         bt_ctf_field_type_integer_get_mapped_clock_class(
 539                                 (void *) field_common->type);
 540                 int val_size;
 541                 uint64_t uval;
 542
 543                 if (!cc) {
 544                         goto end;
 545                 }
 546
 547                 bt_ctf_object_put_ref(cc);
 548                 val_size = bt_ctf_field_type_integer_get_size(
 549                         (void *) field_common->type);
 550                 BT_ASSERT(val_size >= 1);
 551
 552                 if (bt_ctf_field_type_integer_is_signed(
 553                                 (void *) field_common->type)) {
 554                         int64_t ival;
 555
 556                         ret = bt_ctf_field_integer_signed_get_value(field, &ival);
 557                         uval = (uint64_t) ival;
 558                 } else {
 559                         ret = bt_ctf_field_integer_unsigned_get_value(field, &uval);
 560                 }
 561
 562                 if (ret) {
 563                         /* Not set */
 564                         goto end;
 565                 }
 566
 567                 update_clock_value(val, uval, val_size);
 568                 break;
 569         }
 570         case BT_CTF_FIELD_TYPE_ID_ENUM:
 571         {
 572                 struct bt_ctf_field *int_field =
 573                         bt_ctf_field_enumeration_get_container(field);
 574
 575                 BT_ASSERT(int_field);
 576                 ret = visit_field_update_clock_value(int_field, val);
 577                 bt_ctf_object_put_ref(int_field);
 578                 break;
 579         }
 580         case BT_CTF_FIELD_TYPE_ID_ARRAY:
 581         {
 582                 uint64_t i;
 583                 int64_t len = bt_ctf_field_type_array_get_length(
 584                         (void *) field_common->type);
 585
 586                 BT_ASSERT(len >= 0);
 587
 588                 for (i = 0; i < len; i++) {
 589                         struct bt_ctf_field *elem_field =
 590                                 bt_ctf_field_array_get_field(field, i);
 591
 592                         BT_ASSERT(elem_field);
 593                         ret = visit_field_update_clock_value(elem_field, val);
 594                         bt_ctf_object_put_ref(elem_field);
 595                         if (ret) {
 596                                 goto end;
 597                         }
 598                 }
 599                 break;
 600         }
 601         case BT_CTF_FIELD_TYPE_ID_SEQUENCE:
 602         {
 603                 uint64_t i;
 604                 int64_t len = bt_ctf_field_common_sequence_get_length(
 605                         (void *) field);
 606
 607                 if (len < 0) {
 608                         ret = -1;
 609                         goto end;
 610                 }
 611
 612                 for (i = 0; i < len; i++) {
 613                         struct bt_ctf_field *elem_field =
 614                                 bt_ctf_field_sequence_get_field(field, i);
 615
 616                         BT_ASSERT(elem_field);
 617                         ret = visit_field_update_clock_value(elem_field, val);
 618                         bt_ctf_object_put_ref(elem_field);
 619                         if (ret) {
 620                                 goto end;
 621                         }
 622                 }
 623                 break;
 624         }
 625         case BT_CTF_FIELD_TYPE_ID_STRUCT:
 626         {
 627                 uint64_t i;
 628                 int64_t len = bt_ctf_field_type_structure_get_field_count(
 629                         (void *) field_common->type);
 630
 631                 BT_ASSERT(len >= 0);
 632
 633                 for (i = 0; i < len; i++) {
 634                         struct bt_ctf_field *member_field =
 635                                 bt_ctf_field_structure_get_field_by_index(field, i);
 636
 637                         BT_ASSERT(member_field);
 638                         ret = visit_field_update_clock_value(member_field, val);
 639                         bt_ctf_object_put_ref(member_field);
 640                         if (ret) {
 641                                 goto end;
 642                         }
 643                 }
 644                 break;
 645         }
 646         case BT_CTF_FIELD_TYPE_ID_VARIANT:
 647         {
 648                 struct bt_ctf_field *cur_field =
 649                         bt_ctf_field_variant_get_current_field(field);
 650
 651                 if (!cur_field) {
 652                         ret = -1;
 653                         goto end;
 654                 }
 655
 656                 ret = visit_field_update_clock_value(cur_field, val);
 657                 bt_ctf_object_put_ref(cur_field);
 658                 break;
 659         }
 660         default:
 661                 break;
 662         }
 663
 664 end:
 665         return ret;
 666 }
 667
 668 int visit_event_update_clock_value(struct bt_ctf_event *event, uint64_t *val)
 669 {
 670         int ret = 0;
 671         struct bt_ctf_field *field;
 672
 673         field = bt_ctf_event_get_header(event);
 674         ret = visit_field_update_clock_value(field, val);
 675         bt_ctf_object_put_ref(field);
 676         if (ret) {
 677                 BT_LOGW_STR("Cannot automatically update clock value in "
 678                         "event's header.");
 679                 goto end;
 680         }
 681
 682         field = bt_ctf_event_get_stream_event_context(event);
 683         ret = visit_field_update_clock_value(field, val);
 684         bt_ctf_object_put_ref(field);
 685         if (ret) {
 686                 BT_LOGW_STR("Cannot automatically update clock value in "
 687                         "event's stream event context.");
 688                 goto end;
 689         }
 690
 691         field = bt_ctf_event_get_context(event);
 692         ret = visit_field_update_clock_value(field, val);
 693         bt_ctf_object_put_ref(field);
 694         if (ret) {
 695                 BT_LOGW_STR("Cannot automatically update clock value in "
 696                         "event's context.");
 697                 goto end;
 698         }
 699
 700         field = bt_ctf_event_get_payload_field(event);
 701         ret = visit_field_update_clock_value(field, val);
 702         bt_ctf_object_put_ref(field);
 703         if (ret) {
 704                 BT_LOGW_STR("Cannot automatically update clock value in "
 705                         "event's payload.");
 706                 goto end;
 707         }
 708
 709 end:
 710         return ret;
 711 }
 712
 713 static
 714 int set_packet_context_timestamps(struct bt_ctf_stream *stream)
 715 {
 716         int ret = 0;
 717         uint64_t val;
 718         uint64_t cur_clock_value;
 719         uint64_t init_clock_value = 0;
 720         struct bt_ctf_field *ts_begin_field = bt_ctf_field_structure_get_field_by_name(
 721                 stream->packet_context, "timestamp_begin");
 722         struct bt_ctf_field *ts_end_field = bt_ctf_field_structure_get_field_by_name(
 723                 stream->packet_context, "timestamp_end");
 724         struct bt_ctf_field_common *packet_context =
 725                 (void *) stream->packet_context;
 726         uint64_t i;
 727         int64_t len;
 728
 729         if (ts_begin_field && bt_ctf_field_is_set_recursive(ts_begin_field)) {
 730                 /* Use provided `timestamp_begin` value as starting value */
 731                 ret = bt_ctf_field_integer_unsigned_get_value(ts_begin_field, &val);
 732                 BT_ASSERT(ret == 0);
 733                 init_clock_value = val;
 734         } else if (stream->last_ts_end != -1ULL) {
 735                 /* Use last packet's ending timestamp as starting value */
 736                 init_clock_value = stream->last_ts_end;
 737         }
 738
 739         cur_clock_value = init_clock_value;
 740
 741         if (stream->last_ts_end != -1ULL &&
 742                         cur_clock_value < stream->last_ts_end) {
 743                 BT_LOGW("Packet's initial timestamp is less than previous "
 744                         "packet's final timestamp: "
 745                         "stream-addr=%p, stream-name=\"%s\", "
 746                         "cur-packet-ts-begin=%" PRIu64 ", "
 747                         "prev-packet-ts-end=%" PRIu64,
 748                         stream, bt_ctf_stream_get_name(stream),
 749                         cur_clock_value, stream->last_ts_end);
 750                 ret = -1;
 751                 goto end;
 752         }
 753
 754         /*
 755          * Visit all the packet context fields, followed by all the
 756          * fields of all the events, in order, updating our current
 757          * clock value as we visit.
 758          *
 759          * While visiting the packet context fields, do not consider
 760          * `timestamp_begin` and `timestamp_end` because this function's
 761          * purpose is to set them anyway. Also do not consider
 762          * `packet_size`, `content_size`, `events_discarded`, and
 763          * `packet_seq_num` if they are not set because those are
 764          * autopopulating fields.
 765          */
 766         len = bt_ctf_field_type_structure_get_field_count(
 767                 (void *) packet_context->type);
 768         BT_ASSERT(len >= 0);
 769
 770         for (i = 0; i < len; i++) {
 771                 const char *member_name;
 772                 struct bt_ctf_field *member_field;
 773
 774                 ret = bt_ctf_field_type_structure_get_field_by_index(
 775                         (void *) packet_context->type, &member_name, NULL, i);
 776                 BT_ASSERT(ret == 0);
 777
 778                 if (strcmp(member_name, "timestamp_begin") == 0 ||
 779                                 strcmp(member_name, "timestamp_end") == 0) {
 780                         continue;
 781                 }
 782
 783                 member_field = bt_ctf_field_structure_get_field_by_index(
 784                         stream->packet_context, i);
 785                 BT_ASSERT(member_field);
 786
 787                 if (strcmp(member_name, "packet_size") == 0 &&
 788                                 !bt_ctf_field_is_set_recursive(member_field)) {
 789                         bt_ctf_object_put_ref(member_field);
 790                         continue;
 791                 }
 792
 793                 if (strcmp(member_name, "content_size") == 0 &&
 794                                 !bt_ctf_field_is_set_recursive(member_field)) {
 795                         bt_ctf_object_put_ref(member_field);
 796                         continue;
 797                 }
 798
 799                 if (strcmp(member_name, "events_discarded") == 0 &&
 800                                 !bt_ctf_field_is_set_recursive(member_field)) {
 801                         bt_ctf_object_put_ref(member_field);
 802                         continue;
 803                 }
 804
 805                 if (strcmp(member_name, "packet_seq_num") == 0 &&
 806                                 !bt_ctf_field_is_set_recursive(member_field)) {
 807                         bt_ctf_object_put_ref(member_field);
 808                         continue;
 809                 }
 810
 811                 ret = visit_field_update_clock_value(member_field,
 812                         &cur_clock_value);
 813                 bt_ctf_object_put_ref(member_field);
 814                 if (ret) {
 815                         BT_LOGW("Cannot automatically update clock value "
 816                                 "in stream's packet context: "
 817                                 "stream-addr=%p, stream-name=\"%s\", "
 818                                 "field-name=\"%s\"",
 819                                 stream, bt_ctf_stream_get_name(stream),
 820                                 member_name);
 821                         goto end;
 822                 }
 823         }
 824
 825         for (i = 0; i < stream->events->len; i++) {
 826                 struct bt_ctf_event *event = g_ptr_array_index(stream->events, i);
 827
 828                 BT_ASSERT(event);
 829                 ret = visit_event_update_clock_value(event, &cur_clock_value);
 830                 if (ret) {
 831                         BT_LOGW("Cannot automatically update clock value "
 832                                 "in stream's packet context: "
 833                                 "stream-addr=%p, stream-name=\"%s\", "
 834                                 "index=%" PRIu64 ", event-addr=%p, "
 835                                 "event-class-id=%" PRId64 ", "
 836                                 "event-class-name=\"%s\"",
 837                                 stream, bt_ctf_stream_get_name(stream),
 838                                 i, event,
 839                                 bt_ctf_event_class_common_get_id(event->common.class),
 840                                 bt_ctf_event_class_common_get_name(event->common.class));
 841                         goto end;
 842                 }
 843         }
 844
 845         /*
 846          * Everything is visited, thus the current clock value
 847          * corresponds to the ending timestamp. Validate this value
 848          * against the provided value of `timestamp_end`, if any,
 849          * otherwise set it.
 850          */
 851         if (ts_end_field && bt_ctf_field_is_set_recursive(ts_end_field)) {
 852                 ret = bt_ctf_field_integer_unsigned_get_value(ts_end_field, &val);
 853                 BT_ASSERT(ret == 0);
 854
 855                 if (val < cur_clock_value) {
 856                         BT_LOGW("Packet's final timestamp is less than "
 857                                 "computed packet's final timestamp: "
 858                                 "stream-addr=%p, stream-name=\"%s\", "
 859                                 "cur-packet-ts-end=%" PRIu64 ", "
 860                                 "computed-packet-ts-end=%" PRIu64,
 861                                 stream, bt_ctf_stream_get_name(stream),
 862                                 val, cur_clock_value);
 863                         ret = -1;
 864                         goto end;
 865                 }
 866
 867                 stream->last_ts_end = val;
 868         }
 869
 870         if (ts_end_field && !bt_ctf_field_is_set_recursive(ts_end_field)) {
 871                 ret = set_integer_field_value(ts_end_field, cur_clock_value);
 872                 BT_ASSERT(ret == 0);
 873                 stream->last_ts_end = cur_clock_value;
 874         }
 875
 876         if (!ts_end_field) {
 877                 stream->last_ts_end = cur_clock_value;
 878         }
 879
 880         /* Set `timestamp_begin` field to initial clock value */
 881         if (ts_begin_field && !bt_ctf_field_is_set_recursive(ts_begin_field)) {
 882                 ret = set_integer_field_value(ts_begin_field, init_clock_value);
 883                 BT_ASSERT(ret == 0);
 884         }
 885
 886 end:
 887         bt_ctf_object_put_ref(ts_begin_field);
 888         bt_ctf_object_put_ref(ts_end_field);
 889         return ret;
 890 }
 891
 892 static
 893 int auto_populate_packet_context(struct bt_ctf_stream *stream, bool set_ts,
 894                 uint64_t packet_size_bits, uint64_t content_size_bits)
 895 {
 896         int ret = 0;
 897
 898         if (!stream->packet_context) {
 899                 goto end;
 900         }
 901
 902         ret = set_packet_context_packet_size(stream, packet_size_bits);
 903         if (ret) {
 904                 BT_LOGW("Cannot set packet context's packet size field: "
 905                         "stream-addr=%p, stream-name=\"%s\"",
 906                         stream, bt_ctf_stream_get_name(stream));
 907                 goto end;
 908         }
 909
 910         ret = set_packet_context_content_size(stream, content_size_bits);
 911         if (ret) {
 912                 BT_LOGW("Cannot set packet context's content size field: "
 913                         "stream-addr=%p, stream-name=\"%s\"",
 914                         stream, bt_ctf_stream_get_name(stream));
 915                 goto end;
 916         }
 917
 918         if (set_ts) {
 919                 ret = set_packet_context_timestamps(stream);
 920                 if (ret) {
 921                         BT_LOGW("Cannot set packet context's timestamp fields: "
 922                                 "stream-addr=%p, stream-name=\"%s\"",
 923                                 stream, bt_ctf_stream_get_name(stream));
 924                         goto end;
 925                 }
 926         }
 927
 928         ret = set_packet_context_events_discarded(stream);
 929         if (ret) {
 930                 BT_LOGW("Cannot set packet context's discarded events count field: "
 931                         "stream-addr=%p, stream-name=\"%s\"",
 932                         stream, bt_ctf_stream_get_name(stream));
 933                 goto end;
 934         }
 935
 936         BT_LOGV("Automatically populated stream's packet context's known fields: "
 937                 "stream-addr=%p, stream-name=\"%s\"",
 938                 stream, bt_ctf_stream_get_name(stream));
 939
 940 end:
 941         return ret;
 942 }
 943
 944 static
 945 void release_event(struct bt_ctf_event *event)
 946 {
 947         if (bt_ctf_object_get_ref_count(&event->common.base)) {
 948                 /*
 949                  * The event is being orphaned, but it must guarantee the
 950                  * existence of its event class for the duration of its
 951                  * lifetime.
 952                  */
 953                 bt_ctf_object_get_ref(event->common.class);
 954                 BT_CTF_OBJECT_PUT_REF_AND_RESET(event->common.base.parent);
 955         } else {
 956                 bt_ctf_object_try_spec_release(&event->common.base);
 957         }
 958 }
 959
 960 static
 961 int create_stream_file(struct bt_ctf_writer *writer,
 962                 struct bt_ctf_stream *stream)
 963 {
 964         int ret = 0;
 965         GString *filename = g_string_new(NULL);
 966         int64_t stream_class_id;
 967         char *file_path = NULL;
 968
 969         BT_LOGD("Creating stream file: writer-addr=%p, stream-addr=%p, "
 970                 "stream-name=\"%s\", stream-class-addr=%p, stream-class-name=\"%s\"",
 971                 writer, stream, bt_ctf_stream_get_name(stream),
 972                 stream->common.stream_class,
 973                 stream->common.stream_class->name->str);
 974
 975         if (stream->common.name && stream->common.name->len > 0) {
 976                 /* Use stream name's base name as prefix */
 977                 gchar *basename = g_path_get_basename(stream->common.name->str);
 978
 979                 BT_ASSERT(basename);
 980
 981                 if (strcmp(basename, G_DIR_SEPARATOR_S) == 0) {
 982                         g_string_assign(filename, "stream");
 983                 } else {
 984                         g_string_assign(filename, basename);
 985                 }
 986
 987                 g_free(basename);
 988                 goto append_ids;
 989         }
 990
 991         if (stream->common.stream_class->name &&
 992                         stream->common.stream_class->name->len > 0) {
 993                 /* Use stream class name's base name as prefix */
 994                 gchar *basename =
 995                         g_path_get_basename(
 996                                 stream->common.stream_class->name->str);
 997
 998                 BT_ASSERT(basename);
 999
1000                 if (strcmp(basename, G_DIR_SEPARATOR_S) == 0) {
1001                         g_string_assign(filename, "stream");
1002                 } else {
1003                         g_string_assign(filename, basename);
1004                 }
1005
1006                 g_free(basename);
1007                 goto append_ids;
1008         }
1009
1010         /* Default to using `stream-` as prefix */
1011         g_string_assign(filename, "stream");
1012
1013 append_ids:
1014         stream_class_id = bt_ctf_stream_class_common_get_id(stream->common.stream_class);
1015         BT_ASSERT(stream_class_id >= 0);
1016         BT_ASSERT(stream->common.id >= 0);
1017         g_string_append_printf(filename, "-%" PRId64 "-%" PRId64,
1018                 stream_class_id, stream->common.id);
1019
1020         file_path = g_build_filename(writer->path->str, filename->str, NULL);
1021         if (file_path == NULL) {
1022                 ret = -1;
1023                 goto end;
1024         }
1025
1026         ret = bt_ctfser_init(&stream->ctfser, file_path);
1027         g_free(file_path);
1028         if (ret) {
1029                 /* bt_ctfser_init() logs errors */
1030                 goto end;
1031         }
1032
1033         BT_LOGD("Created stream file for writing: "
1034                 "stream-addr=%p, stream-name=\"%s\", "
1035                 "filename=\"%s\"", stream, bt_ctf_stream_get_name(stream),
1036                 filename->str);
1037
1038 end:
1039         g_string_free(filename, TRUE);
1040         return ret;
1041 }
1042
1043 BT_HIDDEN
1044 struct bt_ctf_stream *bt_ctf_stream_create_with_id(
1045                 struct bt_ctf_stream_class *stream_class,
1046                 const char *name, uint64_t id)
1047 {
1048         int ret;
1049         int fd;
1050         struct bt_ctf_stream *stream = NULL;
1051         struct bt_ctf_trace *trace = NULL;
1052         struct bt_ctf_writer *writer = NULL;
1053
1054         BT_LOGD("Creating CTF writer stream object: stream-class-addr=%p, "
1055                 "stream-class-name=\"%s\", stream-name=\"%s\", "
1056                 "stream-id=%" PRIu64,
1057                 stream_class, bt_ctf_stream_class_get_name(stream_class),
1058                 name, id);
1059         stream = g_new0(struct bt_ctf_stream, 1);
1060         if (!stream) {
1061                 BT_LOGE_STR("Failed to allocate one stream.");
1062                 goto error;
1063         }
1064
1065         if (id == -1ULL) {
1066                 id = stream_class->next_stream_id;
1067         }
1068
1069         ret = bt_ctf_stream_common_initialize(BT_CTF_TO_COMMON(stream),
1070                 BT_CTF_TO_COMMON(stream_class), name, id, bt_ctf_stream_destroy);
1071         if (ret) {
1072                 /* bt_ctf_stream_common_initialize() logs errors */
1073                 goto error;
1074         }
1075
1076         trace = BT_CTF_FROM_COMMON(bt_ctf_stream_class_common_borrow_trace(
1077                 BT_CTF_TO_COMMON(stream_class)));
1078         if (!trace) {
1079                 BT_LOGW("Invalid parameter: cannot create stream from a stream class which is not part of trace: "
1080                         "stream-class-addr=%p, stream-class-name=\"%s\", "
1081                         "stream-name=\"%s\"",
1082                         stream_class, bt_ctf_stream_class_get_name(stream_class),
1083                         name);
1084                 goto error;
1085         }
1086
1087         writer = (struct bt_ctf_writer *)
1088                 bt_ctf_object_get_parent(&trace->common.base);
1089         stream->last_ts_end = -1ULL;
1090         BT_LOGD("CTF writer stream object belongs writer's trace: "
1091                 "writer-addr=%p", writer);
1092         BT_ASSERT(writer);
1093
1094         if (stream_class->common.packet_context_field_type) {
1095                 BT_LOGD("Creating stream's packet context field: "
1096                         "ft-addr=%p",
1097                         stream_class->common.packet_context_field_type);
1098                 stream->packet_context = bt_ctf_field_create(
1099                         (void *) stream_class->common.packet_context_field_type);
1100                 if (!stream->packet_context) {
1101                         BT_LOGW_STR("Cannot create stream's packet context field.");
1102                         goto error;
1103                 }
1104
1105                 /* Initialize events_discarded */
1106                 ret = try_set_structure_field_integer(
1107                         stream->packet_context, "events_discarded", 0);
1108                 if (ret < 0) {
1109                         BT_LOGW("Cannot set `events_discarded` field in packet context: "
1110                                 "ret=%d, packet-context-field-addr=%p",
1111                                 ret, stream->packet_context);
1112                         goto error;
1113                 }
1114         }
1115
1116         stream->events = g_ptr_array_new_with_free_func(
1117                 (GDestroyNotify) release_event);
1118         if (!stream->events) {
1119                 BT_LOGE_STR("Failed to allocate a GPtrArray.");
1120                 goto error;
1121         }
1122
1123         if (trace->common.packet_header_field_type) {
1124                 BT_LOGD("Creating stream's packet header field: "
1125                         "ft-addr=%p", trace->common.packet_header_field_type);
1126                 stream->packet_header =
1127                         bt_ctf_field_create(
1128                                 (void *) trace->common.packet_header_field_type);
1129                 if (!stream->packet_header) {
1130                         BT_LOGW_STR("Cannot create stream's packet header field.");
1131                         goto error;
1132                 }
1133         }
1134
1135         /*
1136          * Attempt to populate the default trace packet header fields
1137          * (magic, uuid and stream_id). This will _not_ fail shall the
1138          * fields not be found or be of an incompatible type; they will
1139          * simply not be populated automatically. The user will have to
1140          * make sure to set the trace packet header fields himself
1141          * before flushing.
1142          */
1143         ret = auto_populate_packet_header(stream);
1144         if (ret) {
1145                 BT_LOGW_STR("Cannot automatically populate the stream's packet header.");
1146                 goto error;
1147         }
1148
1149         /* Create file associated with this stream */
1150         fd = create_stream_file(writer, stream);
1151         if (fd < 0) {
1152                 BT_LOGW_STR("Cannot create stream file.");
1153                 goto error;
1154         }
1155
1156         /* Freeze the writer */
1157         BT_LOGD_STR("Freezing stream's CTF writer.");
1158         bt_ctf_writer_freeze(writer);
1159
1160         /* Add this stream to the trace's streams */
1161         g_ptr_array_add(trace->common.streams, stream);
1162         stream_class->next_stream_id++;
1163         BT_LOGD("Created stream object: addr=%p", stream);
1164         goto end;
1165
1166 error:
1167         BT_CTF_OBJECT_PUT_REF_AND_RESET(stream);
1168
1169 end:
1170         bt_ctf_object_put_ref(writer);
1171         return stream;
1172 }
1173
1174 struct bt_ctf_stream *bt_ctf_stream_create(
1175                 struct bt_ctf_stream_class *stream_class,
1176                 const char *name, uint64_t id_param)
1177 {
1178         return bt_ctf_stream_create_with_id(stream_class,
1179                 name, id_param);
1180 }
1181
1182 int bt_ctf_stream_get_discarded_events_count(
1183                 struct bt_ctf_stream *stream, uint64_t *count)
1184 {
1185         int ret = 0;
1186
1187         if (!stream) {
1188                 BT_LOGW_STR("Invalid parameter: stream is NULL.");
1189                 ret = -1;
1190                 goto end;
1191         }
1192
1193         if (!count) {
1194                 BT_LOGW_STR("Invalid parameter: count is NULL.");
1195                 ret = -1;
1196                 goto end;
1197         }
1198
1199         *count = (uint64_t) stream->discarded_events;
1200
1201 end:
1202         return ret;
1203 }
1204
1205 static
1206 int set_packet_context_events_discarded_field(struct bt_ctf_stream *stream,
1207         uint64_t count)
1208 {
1209         int ret = 0;
1210         struct bt_ctf_field *events_discarded_field = NULL;
1211
1212         if (!stream->packet_context) {
1213                 goto end;
1214         }
1215
1216         events_discarded_field = bt_ctf_field_structure_get_field_by_name(
1217                 stream->packet_context, "events_discarded");
1218         if (!events_discarded_field) {
1219                 goto end;
1220         }
1221
1222         ret = bt_ctf_field_integer_unsigned_set_value(
1223                 events_discarded_field, count);
1224         if (ret) {
1225                 BT_LOGW("Cannot set packet context's `events_discarded` field: "
1226                         "field-addr=%p, value=%" PRIu64,
1227                         events_discarded_field, count);
1228                 goto end;
1229         }
1230
1231 end:
1232         bt_ctf_object_put_ref(events_discarded_field);
1233         return ret;
1234 }
1235
1236 void bt_ctf_stream_append_discarded_events(struct bt_ctf_stream *stream,
1237                 uint64_t event_count)
1238 {
1239         int ret;
1240         uint64_t new_count;
1241         struct bt_ctf_field *events_discarded_field = NULL;
1242
1243         if (!stream) {
1244                 BT_LOGW_STR("Invalid parameter: stream is NULL.");
1245                 goto end;
1246         }
1247
1248         BT_LOGV("Appending discarded events to stream: "
1249                 "stream-addr=%p, stream-name=\"%s\", append-count=%" PRIu64,
1250                 stream, bt_ctf_stream_get_name(stream), event_count);
1251
1252         if (!stream->packet_context) {
1253                 BT_LOGW_STR("Invalid parameter: stream has no packet context field.");
1254                 goto end;
1255         }
1256
1257         events_discarded_field = bt_ctf_field_structure_get_field_by_name(
1258                 stream->packet_context, "events_discarded");
1259         if (!events_discarded_field) {
1260                 BT_LOGW_STR("No field named `events_discarded` in stream's packet context.");
1261                 goto end;
1262         }
1263
1264         new_count = stream->discarded_events + event_count;
1265         if (new_count < stream->discarded_events) {
1266                 BT_LOGW("New discarded events count is less than the stream's current discarded events count: "
1267                         "cur-count=%" PRIu64 ", new-count=%" PRIu64,
1268                         stream->discarded_events, new_count);
1269                 goto end;
1270         }
1271
1272         ret = set_packet_context_events_discarded_field(stream, new_count);
1273         if (ret) {
1274                 /* set_packet_context_events_discarded_field() logs errors */
1275                 goto end;
1276         }
1277
1278         stream->discarded_events = new_count;
1279         BT_LOGV("Appended discarded events to stream: "
1280                 "stream-addr=%p, stream-name=\"%s\", append-count=%" PRIu64,
1281                 stream, bt_ctf_stream_get_name(stream), event_count);
1282
1283 end:
1284         bt_ctf_object_put_ref(events_discarded_field);
1285 }
1286
1287 static int auto_populate_event_header(struct bt_ctf_stream *stream,
1288                 struct bt_ctf_event *event)
1289 {
1290         int ret = 0;
1291         struct bt_ctf_field *id_field = NULL, *timestamp_field = NULL;
1292         struct bt_ctf_clock_class *mapped_clock_class = NULL;
1293         struct bt_ctf_stream_class *stream_class =
1294                 BT_CTF_FROM_COMMON(bt_ctf_stream_common_borrow_class(
1295                         BT_CTF_TO_COMMON(stream)));
1296         int64_t event_class_id;
1297
1298         BT_ASSERT(event);
1299
1300         if (!event->common.header_field) {
1301                 goto end;
1302         }
1303
1304         if (event->common.frozen) {
1305                 BT_LOGW_STR("Cannot populate event header field: event is frozen.");
1306                 ret = -1;
1307                 goto end;
1308         }
1309
1310         BT_LOGV("Automatically populating event's header field: "
1311                 "stream-addr=%p, stream-name=\"%s\", event-addr=%p",
1312                 stream, bt_ctf_stream_get_name(stream), event);
1313
1314         id_field = bt_ctf_field_structure_get_field_by_name(
1315                 (void *) event->common.header_field->field, "id");
1316         event_class_id = bt_ctf_event_class_common_get_id(event->common.class);
1317         BT_ASSERT(event_class_id >= 0);
1318
1319         if (id_field && bt_ctf_field_get_type_id(id_field) == BT_CTF_FIELD_TYPE_ID_INTEGER) {
1320                 ret = set_integer_field_value(id_field, event_class_id);
1321                 if (ret) {
1322                         BT_LOGW("Cannot set event header's `id` field's value: "
1323                                 "addr=%p, value=%" PRIu64, id_field,
1324                                 event_class_id);
1325                         goto end;
1326                 }
1327         }
1328
1329         /*
1330          * The conditions to automatically set the timestamp are:
1331          *
1332          * 1. The event header field "timestamp" exists and is an
1333          *    integer field.
1334          * 2. This stream's class has a registered clock (set with
1335          *    bt_ctf_stream_class_set_clock()).
1336          * 3. The "timestamp" field is not set.
1337          */
1338         timestamp_field = bt_ctf_field_structure_get_field_by_name(
1339                         (void *) event->common.header_field->field, "timestamp");
1340         if (timestamp_field && stream_class->clock &&
1341                         bt_ctf_field_get_type_id(id_field) == BT_CTF_FIELD_TYPE_ID_INTEGER &&
1342                         !bt_ctf_field_is_set_recursive(timestamp_field)) {
1343                 mapped_clock_class =
1344                         bt_ctf_field_type_integer_get_mapped_clock_class(
1345                                 (void *) ((struct bt_ctf_field_common *) timestamp_field)->type);
1346                 if (mapped_clock_class) {
1347                         uint64_t timestamp;
1348
1349                         BT_ASSERT(mapped_clock_class ==
1350                                 stream_class->clock->clock_class);
1351                         ret = bt_ctf_clock_get_value(
1352                                 stream_class->clock,
1353                                 &timestamp);
1354                         BT_ASSERT(ret == 0);
1355                         ret = set_integer_field_value(timestamp_field,
1356                                         timestamp);
1357                         if (ret) {
1358                                 BT_LOGW("Cannot set event header's `timestamp` field's value: "
1359                                         "addr=%p, value=%" PRIu64,
1360                                         timestamp_field, timestamp);
1361                                 goto end;
1362                         }
1363                 }
1364         }
1365
1366         BT_LOGV("Automatically populated event's header field: "
1367                 "stream-addr=%p, stream-name=\"%s\", event-addr=%p",
1368                 stream, bt_ctf_stream_get_name(stream), event);
1369
1370 end:
1371         bt_ctf_object_put_ref(id_field);
1372         bt_ctf_object_put_ref(timestamp_field);
1373         bt_ctf_object_put_ref(mapped_clock_class);
1374         return ret;
1375 }
1376
1377 int bt_ctf_stream_append_event(struct bt_ctf_stream *stream,
1378                 struct bt_ctf_event *event)
1379 {
1380         int ret = 0;
1381
1382         if (!stream) {
1383                 BT_LOGW_STR("Invalid parameter: stream is NULL.");
1384                 ret = -1;
1385                 goto end;
1386         }
1387
1388         if (!event) {
1389                 BT_LOGW_STR("Invalid parameter: event is NULL.");
1390                 ret = -1;
1391                 goto end;
1392         }
1393
1394         BT_LOGV("Appending event to stream: "
1395                 "stream-addr=%p, stream-name=\"%s\", event-addr=%p, "
1396                 "event-class-name=\"%s\", event-class-id=%" PRId64,
1397                 stream, bt_ctf_stream_get_name(stream), event,
1398                 bt_ctf_event_class_common_get_name(
1399                         bt_ctf_event_common_borrow_class(BT_CTF_TO_COMMON(event))),
1400                 bt_ctf_event_class_common_get_id(
1401                         bt_ctf_event_common_borrow_class(BT_CTF_TO_COMMON(event))));
1402
1403         /*
1404          * The event is not supposed to have a parent stream at this
1405          * point. The only other way an event can have a parent stream
1406          * is if it was assigned when setting a packet to the event,
1407          * in which case the packet's stream is not a writer stream,
1408          * and thus the user is trying to append an event which belongs
1409          * to another stream.
1410          */
1411         if (event->common.base.parent) {
1412                 ret = -1;
1413                 goto end;
1414         }
1415
1416         bt_ctf_object_set_parent(&event->common.base, &stream->common.base);
1417         BT_LOGV_STR("Automatically populating the header of the event to append.");
1418         ret = auto_populate_event_header(stream, event);
1419         if (ret) {
1420                 /* auto_populate_event_header() reports errors */
1421                 goto error;
1422         }
1423
1424         /* Make sure the various scopes of the event are set */
1425         BT_LOGV_STR("Validating event to append.");
1426         BT_ASSERT_PRE(bt_ctf_event_common_validate(BT_CTF_TO_COMMON(event)) == 0,
1427                 "Invalid event: event-addr=%p", event);
1428
1429         /* Save the new event and freeze it */
1430         BT_LOGV_STR("Freezing the event to append.");
1431         bt_ctf_event_common_set_is_frozen(BT_CTF_TO_COMMON(event), true);
1432         g_ptr_array_add(stream->events, event);
1433
1434         /*
1435          * Event had to hold a reference to its event class as long as it wasn't
1436          * part of the same trace hierarchy. From now on, the event and its
1437          * class share the same lifetime guarantees and the reference is no
1438          * longer needed.
1439          */
1440         BT_LOGV_STR("Putting the event's class.");
1441         bt_ctf_object_put_ref(event->common.class);
1442         BT_LOGV("Appended event to stream: "
1443                 "stream-addr=%p, stream-name=\"%s\", event-addr=%p, "
1444                 "event-class-name=\"%s\", event-class-id=%" PRId64,
1445                 stream, bt_ctf_stream_get_name(stream), event,
1446                 bt_ctf_event_class_common_get_name(
1447                         bt_ctf_event_common_borrow_class(BT_CTF_TO_COMMON(event))),
1448                 bt_ctf_event_class_common_get_id(
1449                         bt_ctf_event_common_borrow_class(BT_CTF_TO_COMMON(event))));
1450
1451 end:
1452         return ret;
1453
1454 error:
1455         /*
1456          * Orphan the event; we were not successful in associating it to
1457          * a stream.
1458          */
1459         bt_ctf_object_set_parent(&event->common.base, NULL);
1460         return ret;
1461 }
1462
1463 struct bt_ctf_field *bt_ctf_stream_get_packet_context(struct bt_ctf_stream *stream)
1464 {
1465         struct bt_ctf_field *packet_context = NULL;
1466
1467         if (!stream) {
1468                 BT_LOGW_STR("Invalid parameter: stream is NULL.");
1469                 goto end;
1470         }
1471
1472         packet_context = stream->packet_context;
1473         if (packet_context) {
1474                 bt_ctf_object_get_ref(packet_context);
1475         }
1476 end:
1477         return packet_context;
1478 }
1479
1480 int bt_ctf_stream_set_packet_context(struct bt_ctf_stream *stream,
1481                 struct bt_ctf_field *field)
1482 {
1483         int ret = 0;
1484         struct bt_ctf_field_type *field_type;
1485
1486         if (!stream) {
1487                 BT_LOGW_STR("Invalid parameter: stream is NULL.");
1488                 ret = -1;
1489                 goto end;
1490         }
1491
1492         field_type = bt_ctf_field_get_type(field);
1493         if (bt_ctf_field_type_common_compare((void *) field_type,
1494                         stream->common.stream_class->packet_context_field_type)) {
1495                 BT_LOGW("Invalid parameter: packet context's field type is different from the stream's packet context field type: "
1496                         "stream-addr=%p, stream-name=\"%s\", "
1497                         "packet-context-field-addr=%p, "
1498                         "packet-context-ft-addr=%p",
1499                         stream, bt_ctf_stream_get_name(stream),
1500                         field, field_type);
1501                 ret = -1;
1502                 goto end;
1503         }
1504
1505         bt_ctf_object_put_ref(field_type);
1506         bt_ctf_object_put_ref(stream->packet_context);
1507         stream->packet_context = bt_ctf_object_get_ref(field);
1508         BT_LOGV("Set stream's packet context field: "
1509                 "stream-addr=%p, stream-name=\"%s\", "
1510                 "packet-context-field-addr=%p",
1511                 stream, bt_ctf_stream_get_name(stream), field);
1512 end:
1513         return ret;
1514 }
1515
1516 struct bt_ctf_field *bt_ctf_stream_get_packet_header(struct bt_ctf_stream *stream)
1517 {
1518         struct bt_ctf_field *packet_header = NULL;
1519
1520         if (!stream) {
1521                 BT_LOGW_STR("Invalid parameter: stream is NULL.");
1522                 goto end;
1523         }
1524
1525         packet_header = stream->packet_header;
1526         if (packet_header) {
1527                 bt_ctf_object_get_ref(packet_header);
1528         }
1529 end:
1530         return packet_header;
1531 }
1532
1533 int bt_ctf_stream_set_packet_header(struct bt_ctf_stream *stream,
1534                 struct bt_ctf_field *field)
1535 {
1536         int ret = 0;
1537         struct bt_ctf_trace *trace = NULL;
1538         struct bt_ctf_field_type *field_type = NULL;
1539
1540         if (!stream) {
1541                 BT_LOGW_STR("Invalid parameter: stream is NULL.");
1542                 ret = -1;
1543                 goto end;
1544         }
1545
1546         trace = (struct bt_ctf_trace *)
1547                 bt_ctf_object_get_parent(&stream->common.base);
1548
1549         if (!field) {
1550                 if (trace->common.packet_header_field_type) {
1551                         BT_LOGW("Invalid parameter: setting no packet header but packet header field type is not NULL: "
1552                                 "stream-addr=%p, stream-name=\"%s\", "
1553                                 "packet-header-field-addr=%p, "
1554                                 "expected-ft-addr=%p",
1555                                 stream, bt_ctf_stream_get_name(stream),
1556                                 field, trace->common.packet_header_field_type);
1557                         ret = -1;
1558                         goto end;
1559                 }
1560
1561                 goto skip_validation;
1562         }
1563
1564         field_type = bt_ctf_field_get_type(field);
1565         BT_ASSERT(field_type);
1566
1567         if (bt_ctf_field_type_common_compare((void *) field_type,
1568                         trace->common.packet_header_field_type)) {
1569                 BT_LOGW("Invalid parameter: packet header's field type is different from the stream's packet header field type: "
1570                         "stream-addr=%p, stream-name=\"%s\", "
1571                         "packet-header-field-addr=%p, "
1572                         "packet-header-ft-addr=%p",
1573                         stream, bt_ctf_stream_get_name(stream),
1574                         field, field_type);
1575                 ret = -1;
1576                 goto end;
1577         }
1578
1579 skip_validation:
1580         bt_ctf_object_put_ref(stream->packet_header);
1581         stream->packet_header = bt_ctf_object_get_ref(field);
1582         BT_LOGV("Set stream's packet header field: "
1583                 "stream-addr=%p, stream-name=\"%s\", "
1584                 "packet-header-field-addr=%p",
1585                 stream, bt_ctf_stream_get_name(stream), field);
1586 end:
1587         BT_CTF_OBJECT_PUT_REF_AND_RESET(trace);
1588         bt_ctf_object_put_ref(field_type);
1589         return ret;
1590 }
1591
1592 static
1593 void reset_structure_field(struct bt_ctf_field *structure, const char *name)
1594 {
1595         struct bt_ctf_field *member;
1596
1597         member = bt_ctf_field_structure_get_field_by_name(structure, name);
1598         if (member) {
1599                 bt_ctf_field_common_reset_recursive((void *) member);
1600                 bt_ctf_object_put_ref(member);
1601         }
1602 }
1603
1604 int bt_ctf_stream_flush(struct bt_ctf_stream *stream)
1605 {
1606         int ret = 0;
1607         size_t i;
1608         uint64_t packet_context_offset_bits = 0;
1609         struct bt_ctf_trace *trace;
1610         enum bt_ctf_byte_order native_byte_order;
1611         bool has_packet_size = false;
1612         uint64_t packet_size_bits = 0;
1613         uint64_t content_size_bits = 0;
1614
1615         if (!stream) {
1616                 BT_LOGW_STR("Invalid parameter: stream is NULL.");
1617                 ret = -1;
1618                 goto end_no_stream;
1619         }
1620
1621         if (stream->packet_context) {
1622                 struct bt_ctf_field *packet_size_field;
1623
1624                 packet_size_field = bt_ctf_field_structure_get_field_by_name(
1625                                 stream->packet_context, "packet_size");
1626                 has_packet_size = (packet_size_field != NULL);
1627                 bt_ctf_object_put_ref(packet_size_field);
1628         }
1629
1630         if (stream->flushed_packet_count == 1) {
1631                 if (!stream->packet_context) {
1632                         BT_LOGW_STR("Cannot flush a stream which has no packet context field more than once.");
1633                         ret = -1;
1634                         goto end;
1635                 }
1636
1637                 if (!has_packet_size) {
1638                         BT_LOGW_STR("Cannot flush a stream which has no packet context's `packet_size` field more than once.");
1639                         ret = -1;
1640                         goto end;
1641                 }
1642         }
1643
1644         BT_LOGV("Flushing stream's current packet: stream-addr=%p, "
1645                 "stream-name=\"%s\", packet-index=%u", stream,
1646                 bt_ctf_stream_get_name(stream), stream->flushed_packet_count);
1647         trace = BT_CTF_FROM_COMMON(bt_ctf_stream_class_common_borrow_trace(
1648                 stream->common.stream_class));
1649         BT_ASSERT(trace);
1650         native_byte_order = bt_ctf_trace_get_native_byte_order(trace);
1651
1652         ret = auto_populate_packet_header(stream);
1653         if (ret) {
1654                 BT_LOGW_STR("Cannot automatically populate the stream's packet header field.");
1655                 ret = -1;
1656                 goto end;
1657         }
1658
1659         /* Initialize packet/content sizes to `0`; we will overwrite later */
1660         ret = auto_populate_packet_context(stream, true, 0, 0);
1661         if (ret) {
1662                 BT_LOGW_STR("Cannot automatically populate the stream's packet context field.");
1663                 ret = -1;
1664                 goto end;
1665         }
1666
1667         ret = bt_ctfser_open_packet(&stream->ctfser);
1668         if (ret) {
1669                 /* bt_ctfser_open_packet() logs errors */
1670                 ret = -1;
1671                 goto end;
1672         }
1673
1674         if (stream->packet_header) {
1675                 BT_LOGV_STR("Serializing packet header field (initial).");
1676                 ret = bt_ctf_field_serialize_recursive(stream->packet_header,
1677                         &stream->ctfser, native_byte_order);
1678                 if (ret) {
1679                         BT_LOGW("Cannot serialize stream's packet header field: "
1680                                 "field-addr=%p", stream->packet_header);
1681                         goto end;
1682                 }
1683         }
1684
1685         if (stream->packet_context) {
1686                 /* Save packet context's position to overwrite it later */
1687                 packet_context_offset_bits =
1688                         bt_ctfser_get_offset_in_current_packet_bits(
1689                                 &stream->ctfser);
1690
1691                 /* Write packet context */
1692                 BT_LOGV_STR("Serializing packet context field (initial).");
1693                 ret = bt_ctf_field_serialize_recursive(stream->packet_context,
1694                         &stream->ctfser, native_byte_order);
1695                 if (ret) {
1696                         BT_LOGW("Cannot serialize stream's packet context field: "
1697                                 "field-addr=%p", stream->packet_context);
1698                         goto end;
1699                 }
1700         }
1701
1702         BT_LOGV("Serializing events: count=%u", stream->events->len);
1703
1704         for (i = 0; i < stream->events->len; i++) {
1705                 struct bt_ctf_event *event = g_ptr_array_index(
1706                         stream->events, i);
1707                 struct bt_ctf_event_class *event_class =
1708                         BT_CTF_FROM_COMMON(bt_ctf_event_common_borrow_class(
1709                                 BT_CTF_TO_COMMON(event)));
1710
1711                 BT_LOGV("Serializing event: index=%zu, event-addr=%p, "
1712                         "event-class-name=\"%s\", event-class-id=%" PRId64 ", "
1713                         "ser-offset=%" PRIu64,
1714                         i, event, bt_ctf_event_class_get_name(event_class),
1715                         bt_ctf_event_class_get_id(event_class),
1716                         bt_ctfser_get_offset_in_current_packet_bits(
1717                                 &stream->ctfser));
1718
1719                 /* Write event header */
1720                 if (event->common.header_field) {
1721                         BT_LOGV_STR("Serializing event's header field.");
1722                         ret = bt_ctf_field_serialize_recursive(
1723                                 (void *) event->common.header_field->field,
1724                                 &stream->ctfser, native_byte_order);
1725                         if (ret) {
1726                                 BT_LOGW("Cannot serialize event's header field: "
1727                                         "field-addr=%p",
1728                                         event->common.header_field->field);
1729                                 goto end;
1730                         }
1731                 }
1732
1733                 /* Write stream event context */
1734                 if (event->common.stream_event_context_field) {
1735                         BT_LOGV_STR("Serializing event's stream event context field.");
1736                         ret = bt_ctf_field_serialize_recursive(
1737                                 (void *) event->common.stream_event_context_field,
1738                                 &stream->ctfser, native_byte_order);
1739                         if (ret) {
1740                                 BT_LOGW("Cannot serialize event's stream event context field: "
1741                                         "field-addr=%p",
1742                                         event->common.stream_event_context_field);
1743                                 goto end;
1744                         }
1745                 }
1746
1747                 /* Write event content */
1748                 ret = bt_ctf_event_serialize(event, &stream->ctfser,
1749                         native_byte_order);
1750                 if (ret) {
1751                         /* bt_ctf_event_serialize() logs errors */
1752                         goto end;
1753                 }
1754         }
1755
1756         content_size_bits = bt_ctfser_get_offset_in_current_packet_bits(
1757                 &stream->ctfser);
1758
1759         if (!has_packet_size && content_size_bits % 8 != 0) {
1760                 BT_LOGW("Stream's packet context field type has no `packet_size` field, "
1761                         "but current content size is not a multiple of 8 bits: "
1762                         "content-size=%" PRIu64 ", "
1763                         "packet-size=%" PRIu64,
1764                         content_size_bits,
1765                         packet_size_bits);
1766                 ret = -1;
1767                 goto end;
1768         }
1769
1770         /* Set packet size; make it a multiple of 8 */
1771         packet_size_bits = (content_size_bits + 7) & ~UINT64_C(7);
1772
1773         if (stream->packet_context) {
1774                 /*
1775                  * The whole packet is serialized at this point. Make
1776                  * sure that, if `packet_size` is missing, the current
1777                  * content size is equal to the current packet size.
1778                  */
1779                 struct bt_ctf_field *field =
1780                         bt_ctf_field_structure_get_field_by_name(
1781                                 stream->packet_context, "content_size");
1782
1783                 bt_ctf_object_put_ref(field);
1784                 if (!field) {
1785                         if (content_size_bits != packet_size_bits) {
1786                                 BT_LOGW("Stream's packet context's `content_size` field is missing, "
1787                                         "but current packet's content size is not equal to its packet size: "
1788                                         "content-size=%" PRIu64 ", "
1789                                         "packet-size=%" PRIu64,
1790                                         bt_ctfser_get_offset_in_current_packet_bits(&stream->ctfser),
1791                                         packet_size_bits);
1792                                 ret = -1;
1793                                 goto end;
1794                         }
1795                 }
1796
1797                 /*
1798                  * Overwrite the packet context now that the stream
1799                  * position's packet and content sizes have the correct
1800                  * values.
1801                  */
1802                 bt_ctfser_set_offset_in_current_packet_bits(&stream->ctfser,
1803                         packet_context_offset_bits);
1804                 ret = auto_populate_packet_context(stream, false,
1805                         packet_size_bits, content_size_bits);
1806                 if (ret) {
1807                         BT_LOGW_STR("Cannot automatically populate the stream's packet context field.");
1808                         ret = -1;
1809                         goto end;
1810                 }
1811
1812                 BT_LOGV("Rewriting (serializing) packet context field.");
1813                 ret = bt_ctf_field_serialize_recursive(stream->packet_context,
1814                         &stream->ctfser, native_byte_order);
1815                 if (ret) {
1816                         BT_LOGW("Cannot serialize stream's packet context field: "
1817                                 "field-addr=%p", stream->packet_context);
1818                         goto end;
1819                 }
1820         }
1821
1822         g_ptr_array_set_size(stream->events, 0);
1823         stream->flushed_packet_count++;
1824         bt_ctfser_close_current_packet(&stream->ctfser, packet_size_bits / 8);
1825
1826 end:
1827         /* Reset automatically-set fields. */
1828         if (stream->packet_context) {
1829                 reset_structure_field(stream->packet_context, "timestamp_begin");
1830                 reset_structure_field(stream->packet_context, "timestamp_end");
1831                 reset_structure_field(stream->packet_context, "packet_size");
1832                 reset_structure_field(stream->packet_context, "content_size");
1833                 reset_structure_field(stream->packet_context, "events_discarded");
1834         }
1835
1836         if (ret == 0) {
1837                 BT_LOGV("Flushed stream's current packet: "
1838                         "content-size=%" PRIu64 ", packet-size=%" PRIu64,
1839                         content_size_bits, packet_size_bits);
1840         }
1841
1842 end_no_stream:
1843         return ret;
1844 }
1845
1846 static
1847 void bt_ctf_stream_destroy(struct bt_ctf_object *obj)
1848 {
1849         struct bt_ctf_stream *stream = (void *) obj;
1850
1851         BT_LOGD("Destroying CTF writer stream object: addr=%p, name=\"%s\"",
1852                 stream, bt_ctf_stream_get_name(stream));
1853
1854         bt_ctf_stream_common_finalize(BT_CTF_TO_COMMON(stream));
1855         bt_ctfser_fini(&stream->ctfser);
1856
1857         if (stream->events) {
1858                 BT_LOGD_STR("Putting events.");
1859                 g_ptr_array_free(stream->events, TRUE);
1860         }
1861
1862         BT_LOGD_STR("Putting packet header field.");
1863         bt_ctf_object_put_ref(stream->packet_header);
1864         BT_LOGD_STR("Putting packet context field.");
1865         bt_ctf_object_put_ref(stream->packet_context);
1866         g_free(stream);
1867 }
1868
1869 static
1870 int _set_structure_field_integer(struct bt_ctf_field *structure, char *name,
1871                 uint64_t value, bt_bool force)
1872 {
1873         int ret = 0;
1874         struct bt_ctf_field_type *field_type = NULL;
1875         struct bt_ctf_field *integer;
1876
1877         BT_ASSERT(structure);
1878         BT_ASSERT(name);
1879
1880         integer = bt_ctf_field_structure_get_field_by_name(structure, name);
1881         if (!integer) {
1882                 /* Field not found, not an error. */
1883                 BT_LOGV("Field not found: struct-field-addr=%p, "
1884                         "name=\"%s\", force=%d", structure, name, force);
1885                 goto end;
1886         }
1887
1888         /* Make sure the payload has not already been set. */
1889         if (!force && bt_ctf_field_is_set_recursive(integer)) {
1890                 /* Payload already set, not an error */
1891                 BT_LOGV("Field's payload is already set: struct-field-addr=%p, "
1892                         "name=\"%s\", force=%d", structure, name, force);
1893                 goto end;
1894         }
1895
1896         field_type = bt_ctf_field_get_type(integer);
1897         BT_ASSERT(field_type);
1898         if (bt_ctf_field_type_get_type_id(field_type) != BT_CTF_FIELD_TYPE_ID_INTEGER) {
1899                 /*
1900                  * The user most likely meant for us to populate this field
1901                  * automatically. However, we can only do this if the field
1902                  * is an integer. Return an error.
1903                  */
1904                 BT_LOGW("Invalid parameter: field's type is not an integer field type: "
1905                         "field-addr=%p, ft-addr=%p, ft-id=%s",
1906                         integer, field_type,
1907                         bt_ctf_field_type_id_string((int)
1908                                 bt_ctf_field_type_get_type_id(field_type)));
1909                 ret = -1;
1910                 goto end;
1911         }
1912
1913         if (bt_ctf_field_type_integer_is_signed(field_type)) {
1914                 ret = bt_ctf_field_integer_signed_set_value(integer,
1915                         (int64_t) value);
1916         } else {
1917                 ret = bt_ctf_field_integer_unsigned_set_value(integer, value);
1918         }
1919         ret = !ret ? 1 : ret;
1920 end:
1921         bt_ctf_object_put_ref(integer);
1922         bt_ctf_object_put_ref(field_type);
1923         return ret;
1924 }
1925
1926 /*
1927  * Returns the following codes:
1928  * 1 if the field was found and set,
1929  * 0 if nothing was done (field not found, or was already set),
1930  * <0 if an error was encoutered
1931  */
1932 static
1933 int try_set_structure_field_integer(struct bt_ctf_field *structure, char *name,
1934                 uint64_t value)
1935 {
1936         return _set_structure_field_integer(structure, name, value, BT_FALSE);
1937 }
1938
1939 struct bt_ctf_stream_class *bt_ctf_stream_get_class(
1940                 struct bt_ctf_stream *stream)
1941 {
1942         return bt_ctf_object_get_ref(bt_ctf_stream_common_borrow_class(BT_CTF_TO_COMMON(stream)));
1943 }
1944
1945 const char *bt_ctf_stream_get_name(struct bt_ctf_stream *stream)
1946 {
1947         return bt_ctf_stream_common_get_name(BT_CTF_TO_COMMON(stream));
1948 }
1949
1950 int64_t bt_ctf_stream_get_id(struct bt_ctf_stream *stream)
1951 {
1952         return bt_ctf_stream_common_get_id(BT_CTF_TO_COMMON(stream));
1953 }