| 1 | /* |
| 2 | * babeltrace-lib.c |
| 3 | * |
| 4 | * Babeltrace Trace Converter Library |
| 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 | #include <stdlib.h> |
| 22 | #include <errno.h> |
| 23 | #include <stdio.h> |
| 24 | #include <inttypes.h> |
| 25 | #include <babeltrace/babeltrace-internal.h> |
| 26 | #include <babeltrace/format.h> |
| 27 | #include <babeltrace/ctf/types.h> |
| 28 | #include <babeltrace/ctf/metadata.h> |
| 29 | #include <babeltrace/ctf-text/types.h> |
| 30 | #include <babeltrace/prio_heap.h> |
| 31 | #include <babeltrace/babeltrace.h> |
| 32 | #include <babeltrace/types.h> |
| 33 | #include <babeltrace/ctf/types.h> |
| 34 | #include <babeltrace/ctf-ir/metadata.h> |
| 35 | #include <stdarg.h> |
| 36 | |
| 37 | int babeltrace_verbose, babeltrace_debug; |
| 38 | |
| 39 | struct stream_saved_pos { |
| 40 | /* |
| 41 | * Use file_stream pointer to check if the trace collection we |
| 42 | * restore to match the one we saved from, for each stream. |
| 43 | */ |
| 44 | struct ctf_file_stream *file_stream; |
| 45 | size_t cur_index; /* current index in packet index */ |
| 46 | ssize_t offset; /* offset from base, in bits. EOF for end of file. */ |
| 47 | }; |
| 48 | |
| 49 | struct babeltrace_saved_pos { |
| 50 | struct trace_collection *tc; |
| 51 | GArray *stream_saved_pos; /* Contains struct stream_saved_pos */ |
| 52 | }; |
| 53 | |
| 54 | struct bt_callback { |
| 55 | int prio; /* Callback order priority. Lower first. Dynamically assigned from dependency graph. */ |
| 56 | void *private_data; |
| 57 | int flags; |
| 58 | struct bt_dependencies *depends; |
| 59 | struct bt_dependencies *weak_depends; |
| 60 | struct bt_dependencies *provides; |
| 61 | enum bt_cb_ret (*callback)(struct bt_ctf_data *ctf_data, |
| 62 | void *private_data); |
| 63 | }; |
| 64 | |
| 65 | struct bt_callback_chain { |
| 66 | GArray *callback; /* Array of struct bt_callback, ordered by priority */ |
| 67 | }; |
| 68 | |
| 69 | /* |
| 70 | * per id callbacks need to be per stream class because event ID vs |
| 71 | * event name mapping can vary from stream to stream. |
| 72 | */ |
| 73 | struct bt_stream_callbacks { |
| 74 | GArray *per_id_callbacks; /* Array of struct bt_callback_chain */ |
| 75 | }; |
| 76 | |
| 77 | /* |
| 78 | * struct babeltrace_iter: data structure representing an iterator on a trace |
| 79 | * collection. |
| 80 | */ |
| 81 | struct babeltrace_iter { |
| 82 | struct ptr_heap *stream_heap; |
| 83 | struct trace_collection *tc; |
| 84 | struct trace_collection_pos *end_pos; |
| 85 | GArray *callbacks; /* Array of struct bt_stream_callbacks */ |
| 86 | struct bt_callback_chain main_callbacks; /* For all events */ |
| 87 | /* |
| 88 | * Flag indicating if dependency graph needs to be recalculated. |
| 89 | * Set by babeltrace_iter_add_callback(), and checked (and |
| 90 | * cleared) by upon entry into babeltrace_iter_read_event(). |
| 91 | * babeltrace_iter_read_event() is responsible for calling dep |
| 92 | * graph calculation if it sees this flag set. |
| 93 | */ |
| 94 | int recalculate_dep_graph; |
| 95 | /* |
| 96 | * Array of pointers to struct bt_dependencies, for garbage |
| 97 | * collection. We're not using a linked list here because each |
| 98 | * struct bt_dependencies can belong to more than one |
| 99 | * babeltrace_iter. |
| 100 | */ |
| 101 | GPtrArray *dep_gc; |
| 102 | }; |
| 103 | |
| 104 | struct bt_dependencies { |
| 105 | GArray *deps; /* Array of GQuarks */ |
| 106 | int refcount; /* free when decremented to 0 */ |
| 107 | }; |
| 108 | |
| 109 | static |
| 110 | struct bt_dependencies *_babeltrace_dependencies_create(const char *first, |
| 111 | va_list ap) |
| 112 | { |
| 113 | const char *iter; |
| 114 | struct bt_dependencies *dep; |
| 115 | |
| 116 | dep = g_new0(struct bt_dependencies, 1); |
| 117 | dep->refcount = 1; |
| 118 | dep->deps = g_array_new(FALSE, TRUE, sizeof(GQuark)); |
| 119 | iter = first; |
| 120 | while (iter) { |
| 121 | GQuark q = g_quark_from_string(iter); |
| 122 | g_array_append_val(dep->deps, q); |
| 123 | iter = va_arg(ap, const char *); |
| 124 | } |
| 125 | return dep; |
| 126 | } |
| 127 | |
| 128 | struct bt_dependencies *babeltrace_dependencies_create(const char *first, ...) |
| 129 | { |
| 130 | va_list ap; |
| 131 | struct bt_dependencies *deps; |
| 132 | |
| 133 | va_start(ap, first); |
| 134 | deps = _babeltrace_dependencies_create(first, ap); |
| 135 | va_end(ap); |
| 136 | return deps; |
| 137 | } |
| 138 | |
| 139 | /* |
| 140 | * babeltrace_iter_add_callback: Add a callback to iterator. |
| 141 | */ |
| 142 | int babeltrace_iter_add_callback(struct babeltrace_iter *iter, |
| 143 | bt_event_name event, void *private_data, int flags, |
| 144 | enum bt_cb_ret (*callback)(struct bt_ctf_data *ctf_data, |
| 145 | void *private_data), |
| 146 | struct bt_dependencies *depends, |
| 147 | struct bt_dependencies *weak_depends, |
| 148 | struct bt_dependencies *provides) |
| 149 | { |
| 150 | int i, stream_id; |
| 151 | gpointer *event_id_ptr; |
| 152 | unsigned long event_id; |
| 153 | struct trace_collection *tc = iter->tc; |
| 154 | |
| 155 | for (i = 0; i < tc->array->len; i++) { |
| 156 | struct ctf_trace *tin; |
| 157 | struct trace_descriptor *td_read; |
| 158 | |
| 159 | td_read = g_ptr_array_index(tc->array, i); |
| 160 | tin = container_of(td_read, struct ctf_trace, parent); |
| 161 | |
| 162 | for (stream_id = 0; stream_id < tin->streams->len; stream_id++) { |
| 163 | struct ctf_stream_class *stream; |
| 164 | struct bt_stream_callbacks *bt_stream_cb = NULL; |
| 165 | struct bt_callback_chain *bt_chain = NULL; |
| 166 | struct bt_callback new_callback; |
| 167 | |
| 168 | stream = g_ptr_array_index(tin->streams, stream_id); |
| 169 | |
| 170 | if (stream_id >= iter->callbacks->len) { |
| 171 | g_array_set_size(iter->callbacks, stream->stream_id + 1); |
| 172 | } |
| 173 | bt_stream_cb = &g_array_index(iter->callbacks, |
| 174 | struct bt_stream_callbacks, stream->stream_id); |
| 175 | if (!bt_stream_cb->per_id_callbacks) { |
| 176 | bt_stream_cb->per_id_callbacks = g_array_new(FALSE, TRUE, |
| 177 | sizeof(struct bt_callback_chain)); |
| 178 | } |
| 179 | |
| 180 | if (event) { |
| 181 | /* find the event id */ |
| 182 | event_id_ptr = g_hash_table_lookup(stream->event_quark_to_id, |
| 183 | (gconstpointer) (unsigned long) event); |
| 184 | /* event not found in this stream class */ |
| 185 | if (!event_id_ptr) { |
| 186 | printf("event not found\n"); |
| 187 | continue; |
| 188 | } |
| 189 | event_id = (uint64_t)(unsigned long) *event_id_ptr; |
| 190 | |
| 191 | /* find or create the bt_callback_chain for this event */ |
| 192 | if (event_id >= bt_stream_cb->per_id_callbacks->len) { |
| 193 | g_array_set_size(bt_stream_cb->per_id_callbacks, event_id + 1); |
| 194 | } |
| 195 | bt_chain = &g_array_index(bt_stream_cb->per_id_callbacks, |
| 196 | struct bt_callback_chain, event_id); |
| 197 | if (!bt_chain->callback) { |
| 198 | bt_chain->callback = g_array_new(FALSE, TRUE, |
| 199 | sizeof(struct bt_callback)); |
| 200 | } |
| 201 | } else { |
| 202 | /* callback for all events */ |
| 203 | if (!iter->main_callbacks.callback) { |
| 204 | iter->main_callbacks.callback = g_array_new(FALSE, TRUE, |
| 205 | sizeof(struct bt_callback)); |
| 206 | } |
| 207 | bt_chain = &iter->main_callbacks; |
| 208 | } |
| 209 | |
| 210 | new_callback.private_data = private_data; |
| 211 | new_callback.flags = flags; |
| 212 | new_callback.callback = callback; |
| 213 | new_callback.depends = depends; |
| 214 | new_callback.weak_depends = weak_depends; |
| 215 | new_callback.provides = provides; |
| 216 | |
| 217 | /* TODO : take care of priority, for now just FIFO */ |
| 218 | g_array_append_val(bt_chain->callback, new_callback); |
| 219 | } |
| 220 | } |
| 221 | |
| 222 | return 0; |
| 223 | } |
| 224 | |
| 225 | static int stream_read_event(struct ctf_file_stream *sin) |
| 226 | { |
| 227 | int ret; |
| 228 | |
| 229 | ret = sin->pos.parent.event_cb(&sin->pos.parent, &sin->parent); |
| 230 | if (ret == EOF) |
| 231 | return EOF; |
| 232 | else if (ret) { |
| 233 | fprintf(stdout, "[error] Reading event failed.\n"); |
| 234 | return ret; |
| 235 | } |
| 236 | return 0; |
| 237 | } |
| 238 | |
| 239 | /* |
| 240 | * returns true if a < b, false otherwise. |
| 241 | */ |
| 242 | int stream_compare(void *a, void *b) |
| 243 | { |
| 244 | struct ctf_file_stream *s_a = a, *s_b = b; |
| 245 | |
| 246 | if (s_a->parent.timestamp < s_b->parent.timestamp) |
| 247 | return 1; |
| 248 | else |
| 249 | return 0; |
| 250 | } |
| 251 | |
| 252 | /* |
| 253 | * babeltrace_filestream_seek: seek a filestream to given position. |
| 254 | * |
| 255 | * The stream_id parameter is only useful for BT_SEEK_RESTORE. |
| 256 | */ |
| 257 | static int babeltrace_filestream_seek(struct ctf_file_stream *file_stream, |
| 258 | const struct trace_collection_pos *begin_pos, |
| 259 | unsigned long stream_id) |
| 260 | { |
| 261 | int ret = 0; |
| 262 | |
| 263 | switch (begin_pos->type) { |
| 264 | case BT_SEEK_CUR: |
| 265 | /* |
| 266 | * just insert into the heap we should already know |
| 267 | * the timestamps |
| 268 | */ |
| 269 | break; |
| 270 | case BT_SEEK_BEGIN: |
| 271 | file_stream->pos.move_pos_slow(&file_stream->pos, 0, SEEK_SET); |
| 272 | ret = stream_read_event(file_stream); |
| 273 | break; |
| 274 | case BT_SEEK_TIME: |
| 275 | case BT_SEEK_RESTORE: |
| 276 | case BT_SEEK_END: |
| 277 | default: |
| 278 | assert(0); /* Not yet defined */ |
| 279 | } |
| 280 | |
| 281 | return ret; |
| 282 | } |
| 283 | |
| 284 | /* |
| 285 | * babeltrace_iter_seek: seek iterator to given position. |
| 286 | */ |
| 287 | int babeltrace_iter_seek(struct babeltrace_iter *iter, |
| 288 | const struct trace_collection_pos *begin_pos) |
| 289 | { |
| 290 | int i, stream_id; |
| 291 | int ret = 0; |
| 292 | struct trace_collection *tc = iter->tc; |
| 293 | |
| 294 | for (i = 0; i < tc->array->len; i++) { |
| 295 | struct ctf_trace *tin; |
| 296 | struct trace_descriptor *td_read; |
| 297 | |
| 298 | td_read = g_ptr_array_index(tc->array, i); |
| 299 | tin = container_of(td_read, struct ctf_trace, parent); |
| 300 | |
| 301 | /* Populate heap with each stream */ |
| 302 | for (stream_id = 0; stream_id < tin->streams->len; |
| 303 | stream_id++) { |
| 304 | struct ctf_stream_class *stream; |
| 305 | int filenr; |
| 306 | |
| 307 | stream = g_ptr_array_index(tin->streams, stream_id); |
| 308 | for (filenr = 0; filenr < stream->streams->len; |
| 309 | filenr++) { |
| 310 | struct ctf_file_stream *file_stream; |
| 311 | |
| 312 | file_stream = g_ptr_array_index(stream->streams, |
| 313 | filenr); |
| 314 | ret = babeltrace_filestream_seek(file_stream, begin_pos, |
| 315 | stream_id); |
| 316 | if (ret < 0) |
| 317 | goto end; |
| 318 | } |
| 319 | } |
| 320 | } |
| 321 | end: |
| 322 | return ret; |
| 323 | } |
| 324 | |
| 325 | struct babeltrace_iter *babeltrace_iter_create(struct trace_collection *tc, |
| 326 | struct trace_collection_pos *begin_pos, |
| 327 | struct trace_collection_pos *end_pos) |
| 328 | { |
| 329 | int i, stream_id; |
| 330 | int ret = 0; |
| 331 | struct babeltrace_iter *iter; |
| 332 | |
| 333 | iter = malloc(sizeof(struct babeltrace_iter)); |
| 334 | if (!iter) |
| 335 | goto error_malloc; |
| 336 | iter->stream_heap = g_new(struct ptr_heap, 1); |
| 337 | iter->tc = tc; |
| 338 | iter->end_pos = end_pos; |
| 339 | iter->callbacks = g_array_new(0, 1, sizeof(struct bt_stream_callbacks)); |
| 340 | iter->recalculate_dep_graph = 0; |
| 341 | iter->main_callbacks.callback = NULL; |
| 342 | iter->dep_gc = g_ptr_array_new(); |
| 343 | |
| 344 | ret = heap_init(iter->stream_heap, 0, stream_compare); |
| 345 | if (ret < 0) |
| 346 | goto error_heap_init; |
| 347 | |
| 348 | for (i = 0; i < tc->array->len; i++) { |
| 349 | struct ctf_trace *tin; |
| 350 | struct trace_descriptor *td_read; |
| 351 | |
| 352 | td_read = g_ptr_array_index(tc->array, i); |
| 353 | tin = container_of(td_read, struct ctf_trace, parent); |
| 354 | |
| 355 | /* Populate heap with each stream */ |
| 356 | for (stream_id = 0; stream_id < tin->streams->len; |
| 357 | stream_id++) { |
| 358 | struct ctf_stream_class *stream; |
| 359 | int filenr; |
| 360 | |
| 361 | stream = g_ptr_array_index(tin->streams, stream_id); |
| 362 | if (!stream) |
| 363 | continue; |
| 364 | for (filenr = 0; filenr < stream->streams->len; |
| 365 | filenr++) { |
| 366 | struct ctf_file_stream *file_stream; |
| 367 | |
| 368 | file_stream = g_ptr_array_index(stream->streams, |
| 369 | filenr); |
| 370 | |
| 371 | if (begin_pos) { |
| 372 | ret = babeltrace_filestream_seek(file_stream, begin_pos, |
| 373 | stream_id); |
| 374 | if (ret == EOF) { |
| 375 | ret = 0; |
| 376 | continue; |
| 377 | } else if (ret) { |
| 378 | goto error; |
| 379 | } |
| 380 | } |
| 381 | /* Add to heap */ |
| 382 | ret = heap_insert(iter->stream_heap, file_stream); |
| 383 | if (ret) |
| 384 | goto error; |
| 385 | } |
| 386 | } |
| 387 | } |
| 388 | |
| 389 | return iter; |
| 390 | |
| 391 | error: |
| 392 | heap_free(iter->stream_heap); |
| 393 | error_heap_init: |
| 394 | g_free(iter->stream_heap); |
| 395 | free(iter); |
| 396 | error_malloc: |
| 397 | return NULL; |
| 398 | } |
| 399 | |
| 400 | void babeltrace_iter_destroy(struct babeltrace_iter *iter) |
| 401 | { |
| 402 | struct bt_stream_callbacks *bt_stream_cb; |
| 403 | struct bt_callback_chain *bt_chain; |
| 404 | int i, j; |
| 405 | |
| 406 | heap_free(iter->stream_heap); |
| 407 | g_free(iter->stream_heap); |
| 408 | |
| 409 | /* free all events callbacks */ |
| 410 | if (iter->main_callbacks.callback) |
| 411 | g_array_free(iter->main_callbacks.callback, TRUE); |
| 412 | |
| 413 | /* free per-event callbacks */ |
| 414 | for (i = 0; i < iter->callbacks->len; i++) { |
| 415 | bt_stream_cb = &g_array_index(iter->callbacks, |
| 416 | struct bt_stream_callbacks, i); |
| 417 | if (!bt_stream_cb || !bt_stream_cb->per_id_callbacks) |
| 418 | continue; |
| 419 | for (j = 0; j < bt_stream_cb->per_id_callbacks->len; j++) { |
| 420 | bt_chain = &g_array_index(bt_stream_cb->per_id_callbacks, |
| 421 | struct bt_callback_chain, j); |
| 422 | if (bt_chain->callback) { |
| 423 | g_array_free(bt_chain->callback, TRUE); |
| 424 | } |
| 425 | } |
| 426 | g_array_free(bt_stream_cb->per_id_callbacks, TRUE); |
| 427 | } |
| 428 | |
| 429 | free(iter); |
| 430 | } |
| 431 | |
| 432 | int babeltrace_iter_next(struct babeltrace_iter *iter) |
| 433 | { |
| 434 | struct ctf_file_stream *file_stream, *removed; |
| 435 | int ret; |
| 436 | |
| 437 | file_stream = heap_maximum(iter->stream_heap); |
| 438 | if (!file_stream) { |
| 439 | /* end of file for all streams */ |
| 440 | ret = 0; |
| 441 | goto end; |
| 442 | } |
| 443 | |
| 444 | ret = stream_read_event(file_stream); |
| 445 | if (ret == EOF) { |
| 446 | removed = heap_remove(iter->stream_heap); |
| 447 | assert(removed == file_stream); |
| 448 | ret = 0; |
| 449 | goto end; |
| 450 | } else if (ret) { |
| 451 | goto end; |
| 452 | } |
| 453 | /* Reinsert the file stream into the heap, and rebalance. */ |
| 454 | removed = heap_replace_max(iter->stream_heap, file_stream); |
| 455 | assert(removed == file_stream); |
| 456 | |
| 457 | end: |
| 458 | return ret; |
| 459 | } |
| 460 | |
| 461 | static |
| 462 | struct ctf_stream_event *extract_ctf_stream_event(struct ctf_stream *stream) |
| 463 | { |
| 464 | struct ctf_stream_class *stream_class = stream->stream_class; |
| 465 | struct ctf_event *event_class; |
| 466 | struct ctf_stream_event *event; |
| 467 | uint64_t id = stream->event_id; |
| 468 | |
| 469 | if (id >= stream_class->events_by_id->len) { |
| 470 | fprintf(stdout, "[error] Event id %" PRIu64 " is outside range.\n", id); |
| 471 | return NULL; |
| 472 | } |
| 473 | event = g_ptr_array_index(stream->events_by_id, id); |
| 474 | if (!event) { |
| 475 | fprintf(stdout, "[error] Event id %" PRIu64 " is unknown.\n", id); |
| 476 | return NULL; |
| 477 | } |
| 478 | event_class = g_ptr_array_index(stream_class->events_by_id, id); |
| 479 | if (!event_class) { |
| 480 | fprintf(stdout, "[error] Event id %" PRIu64 " is unknown.\n", id); |
| 481 | return NULL; |
| 482 | } |
| 483 | |
| 484 | return event; |
| 485 | } |
| 486 | |
| 487 | static |
| 488 | void process_callbacks(struct babeltrace_iter *iter, |
| 489 | struct ctf_stream *stream) |
| 490 | { |
| 491 | struct bt_stream_callbacks *bt_stream_cb; |
| 492 | struct bt_callback_chain *bt_chain; |
| 493 | struct bt_callback *cb; |
| 494 | int i; |
| 495 | enum bt_cb_ret ret; |
| 496 | struct bt_ctf_data ctf_data; |
| 497 | |
| 498 | ctf_data.event = extract_ctf_stream_event(stream); |
| 499 | ctf_data.stream = stream; |
| 500 | |
| 501 | /* process all events callback first */ |
| 502 | if (iter->main_callbacks.callback) { |
| 503 | for (i = 0; i < iter->main_callbacks.callback->len; i++) { |
| 504 | cb = &g_array_index(iter->main_callbacks.callback, struct bt_callback, i); |
| 505 | if (!cb) |
| 506 | goto end; |
| 507 | ret = cb->callback(&ctf_data, cb->private_data); |
| 508 | switch (ret) { |
| 509 | case BT_CB_OK_STOP: |
| 510 | case BT_CB_ERROR_STOP: |
| 511 | goto end; |
| 512 | default: |
| 513 | break; |
| 514 | } |
| 515 | } |
| 516 | } |
| 517 | |
| 518 | /* process per event callbacks */ |
| 519 | bt_stream_cb = &g_array_index(iter->callbacks, |
| 520 | struct bt_stream_callbacks, stream->stream_id); |
| 521 | if (!bt_stream_cb || !bt_stream_cb->per_id_callbacks) |
| 522 | goto end; |
| 523 | |
| 524 | if (stream->event_id > bt_stream_cb->per_id_callbacks->len) |
| 525 | goto end; |
| 526 | bt_chain = &g_array_index(bt_stream_cb->per_id_callbacks, |
| 527 | struct bt_callback_chain, stream->event_id); |
| 528 | if (!bt_chain || !bt_chain->callback) |
| 529 | goto end; |
| 530 | |
| 531 | for (i = 0; i < bt_chain->callback->len; i++) { |
| 532 | cb = &g_array_index(bt_chain->callback, struct bt_callback, i); |
| 533 | if (!cb) |
| 534 | goto end; |
| 535 | ret = cb->callback(&ctf_data, cb->private_data); |
| 536 | switch (ret) { |
| 537 | case BT_CB_OK_STOP: |
| 538 | case BT_CB_ERROR_STOP: |
| 539 | goto end; |
| 540 | default: |
| 541 | break; |
| 542 | } |
| 543 | } |
| 544 | |
| 545 | end: |
| 546 | return; |
| 547 | } |
| 548 | |
| 549 | int babeltrace_iter_read_event(struct babeltrace_iter *iter, |
| 550 | struct ctf_stream **stream, |
| 551 | struct ctf_stream_event **event) |
| 552 | { |
| 553 | struct ctf_file_stream *file_stream; |
| 554 | int ret = 0; |
| 555 | |
| 556 | file_stream = heap_maximum(iter->stream_heap); |
| 557 | if (!file_stream) { |
| 558 | /* end of file for all streams */ |
| 559 | ret = EOF; |
| 560 | goto end; |
| 561 | } |
| 562 | *stream = &file_stream->parent; |
| 563 | *event = g_ptr_array_index((*stream)->events_by_id, (*stream)->event_id); |
| 564 | |
| 565 | if ((*stream)->stream_id > iter->callbacks->len) |
| 566 | goto end; |
| 567 | |
| 568 | process_callbacks(iter, *stream); |
| 569 | |
| 570 | end: |
| 571 | return ret; |
| 572 | } |
| 573 | |
| 574 | int convert_trace(struct trace_descriptor *td_write, |
| 575 | struct trace_collection *trace_collection_read) |
| 576 | { |
| 577 | struct babeltrace_iter *iter; |
| 578 | struct ctf_stream *stream; |
| 579 | struct ctf_stream_event *event; |
| 580 | struct ctf_text_stream_pos *sout; |
| 581 | struct trace_collection_pos begin_pos; |
| 582 | int ret = 0; |
| 583 | |
| 584 | sout = container_of(td_write, struct ctf_text_stream_pos, |
| 585 | trace_descriptor); |
| 586 | |
| 587 | begin_pos.type = BT_SEEK_BEGIN; |
| 588 | iter = babeltrace_iter_create(trace_collection_read, &begin_pos, NULL); |
| 589 | while (babeltrace_iter_read_event(iter, &stream, &event) == 0) { |
| 590 | ret = sout->parent.event_cb(&sout->parent, stream); |
| 591 | if (ret) { |
| 592 | fprintf(stdout, "[error] Writing event failed.\n"); |
| 593 | goto end; |
| 594 | } |
| 595 | ret = babeltrace_iter_next(iter); |
| 596 | if (ret < 0) |
| 597 | goto end; |
| 598 | } |
| 599 | end: |
| 600 | babeltrace_iter_destroy(iter); |
| 601 | return ret; |
| 602 | } |
| 603 | |
| 604 | static |
| 605 | void __attribute__((constructor)) init_babeltrace_lib(void) |
| 606 | { |
| 607 | if (getenv("BABELTRACE_VERBOSE")) |
| 608 | babeltrace_verbose = 1; |
| 609 | if (getenv("BABELTRACE_DEBUG")) |
| 610 | babeltrace_debug = 1; |
| 611 | } |