| 1 | /* |
| 2 | * ctf/events.c |
| 3 | * |
| 4 | * Babeltrace Library |
| 5 | * |
| 6 | * Copyright 2011-2012 EfficiOS Inc. and Linux Foundation |
| 7 | * |
| 8 | * Author: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 9 | * Julien Desfossez <julien.desfossez@efficios.com> |
| 10 | * |
| 11 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 12 | * of this software and associated documentation files (the "Software"), to deal |
| 13 | * in the Software without restriction, including without limitation the rights |
| 14 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 15 | * copies of the Software, and to permit persons to whom the Software is |
| 16 | * furnished to do so, subject to the following conditions: |
| 17 | * |
| 18 | * The above copyright notice and this permission notice shall be included in |
| 19 | * all copies or substantial portions of the Software. |
| 20 | */ |
| 21 | |
| 22 | #include <babeltrace/babeltrace.h> |
| 23 | #include <babeltrace/format.h> |
| 24 | #include <babeltrace/ctf/events.h> |
| 25 | #include <babeltrace/ctf-ir/metadata.h> |
| 26 | #include <babeltrace/prio_heap.h> |
| 27 | #include <babeltrace/iterator-internal.h> |
| 28 | #include <babeltrace/ctf/events-internal.h> |
| 29 | #include <babeltrace/ctf/metadata.h> |
| 30 | #include <glib.h> |
| 31 | |
| 32 | /* |
| 33 | * thread local storage to store the last error that occured |
| 34 | * while reading a field, this variable must be accessed by |
| 35 | * bt_ctf_field_error only |
| 36 | */ |
| 37 | __thread int bt_ctf_last_field_error = 0; |
| 38 | |
| 39 | struct bt_ctf_iter *bt_ctf_iter_create(struct bt_context *ctx, |
| 40 | struct bt_iter_pos *begin_pos, |
| 41 | struct bt_iter_pos *end_pos) |
| 42 | { |
| 43 | struct bt_ctf_iter *iter; |
| 44 | int ret; |
| 45 | |
| 46 | iter = g_new0(struct bt_ctf_iter, 1); |
| 47 | ret = bt_iter_init(&iter->parent, ctx, begin_pos, end_pos); |
| 48 | if (ret) { |
| 49 | g_free(iter); |
| 50 | return NULL; |
| 51 | } |
| 52 | iter->callbacks = g_array_new(0, 1, sizeof(struct bt_stream_callbacks)); |
| 53 | iter->recalculate_dep_graph = 0; |
| 54 | iter->main_callbacks.callback = NULL; |
| 55 | iter->dep_gc = g_ptr_array_new(); |
| 56 | return iter; |
| 57 | } |
| 58 | |
| 59 | void bt_ctf_iter_destroy(struct bt_ctf_iter *iter) |
| 60 | { |
| 61 | struct bt_stream_callbacks *bt_stream_cb; |
| 62 | struct bt_callback_chain *bt_chain; |
| 63 | int i, j; |
| 64 | |
| 65 | /* free all events callbacks */ |
| 66 | if (iter->main_callbacks.callback) |
| 67 | g_array_free(iter->main_callbacks.callback, TRUE); |
| 68 | |
| 69 | /* free per-event callbacks */ |
| 70 | for (i = 0; i < iter->callbacks->len; i++) { |
| 71 | bt_stream_cb = &g_array_index(iter->callbacks, |
| 72 | struct bt_stream_callbacks, i); |
| 73 | if (!bt_stream_cb || !bt_stream_cb->per_id_callbacks) |
| 74 | continue; |
| 75 | for (j = 0; j < bt_stream_cb->per_id_callbacks->len; j++) { |
| 76 | bt_chain = &g_array_index(bt_stream_cb->per_id_callbacks, |
| 77 | struct bt_callback_chain, j); |
| 78 | if (bt_chain->callback) { |
| 79 | g_array_free(bt_chain->callback, TRUE); |
| 80 | } |
| 81 | } |
| 82 | g_array_free(bt_stream_cb->per_id_callbacks, TRUE); |
| 83 | } |
| 84 | |
| 85 | bt_iter_fini(&iter->parent); |
| 86 | g_free(iter); |
| 87 | } |
| 88 | |
| 89 | struct bt_iter *bt_ctf_get_iter(struct bt_ctf_iter *iter) |
| 90 | { |
| 91 | return &iter->parent; |
| 92 | } |
| 93 | |
| 94 | struct bt_ctf_event *bt_ctf_iter_read_event(struct bt_ctf_iter *iter) |
| 95 | { |
| 96 | struct ctf_file_stream *file_stream; |
| 97 | struct bt_ctf_event *ret = &iter->current_ctf_event; |
| 98 | |
| 99 | file_stream = heap_maximum(iter->parent.stream_heap); |
| 100 | if (!file_stream) { |
| 101 | /* end of file for all streams */ |
| 102 | goto stop; |
| 103 | } |
| 104 | ret->stream = &file_stream->parent; |
| 105 | ret->event = g_ptr_array_index(ret->stream->events_by_id, |
| 106 | ret->stream->event_id); |
| 107 | |
| 108 | if (ret->stream->stream_id > iter->callbacks->len) |
| 109 | goto end; |
| 110 | |
| 111 | process_callbacks(iter, ret->stream); |
| 112 | |
| 113 | end: |
| 114 | return ret; |
| 115 | stop: |
| 116 | return NULL; |
| 117 | } |
| 118 | |
| 119 | struct definition *bt_ctf_get_top_level_scope(struct bt_ctf_event *event, |
| 120 | enum bt_ctf_scope scope) |
| 121 | { |
| 122 | struct definition *tmp = NULL; |
| 123 | |
| 124 | switch (scope) { |
| 125 | case BT_TRACE_PACKET_HEADER: |
| 126 | if (!event->stream) |
| 127 | goto error; |
| 128 | if (event->stream->trace_packet_header) |
| 129 | tmp = &event->stream->trace_packet_header->p; |
| 130 | break; |
| 131 | case BT_STREAM_PACKET_CONTEXT: |
| 132 | if (!event->stream) |
| 133 | goto error; |
| 134 | if (event->stream->stream_packet_context) |
| 135 | tmp = &event->stream->stream_packet_context->p; |
| 136 | break; |
| 137 | case BT_STREAM_EVENT_HEADER: |
| 138 | if (!event->stream) |
| 139 | goto error; |
| 140 | if (event->stream->stream_event_header) |
| 141 | tmp = &event->stream->stream_event_header->p; |
| 142 | break; |
| 143 | case BT_STREAM_EVENT_CONTEXT: |
| 144 | if (!event->stream) |
| 145 | goto error; |
| 146 | if (event->stream->stream_event_context) |
| 147 | tmp = &event->stream->stream_event_context->p; |
| 148 | break; |
| 149 | case BT_EVENT_CONTEXT: |
| 150 | if (!event->event) |
| 151 | goto error; |
| 152 | if (event->event->event_context) |
| 153 | tmp = &event->event->event_context->p; |
| 154 | break; |
| 155 | case BT_EVENT_FIELDS: |
| 156 | if (!event->event) |
| 157 | goto error; |
| 158 | if (event->event->event_fields) |
| 159 | tmp = &event->event->event_fields->p; |
| 160 | break; |
| 161 | } |
| 162 | return tmp; |
| 163 | |
| 164 | error: |
| 165 | return NULL; |
| 166 | } |
| 167 | |
| 168 | struct definition *bt_ctf_get_field(struct bt_ctf_event *event, |
| 169 | struct definition *scope, |
| 170 | const char *field) |
| 171 | { |
| 172 | struct definition *def; |
| 173 | |
| 174 | if (scope) { |
| 175 | def = lookup_definition(scope, field); |
| 176 | if (bt_ctf_field_type(def) == CTF_TYPE_VARIANT) { |
| 177 | struct definition_variant *variant_definition; |
| 178 | variant_definition = container_of(def, |
| 179 | struct definition_variant, p); |
| 180 | return variant_definition->current_field; |
| 181 | } |
| 182 | return def; |
| 183 | } |
| 184 | return NULL; |
| 185 | } |
| 186 | |
| 187 | struct definition *bt_ctf_get_index(struct bt_ctf_event *event, |
| 188 | struct definition *field, |
| 189 | unsigned int index) |
| 190 | { |
| 191 | struct definition *ret = NULL; |
| 192 | |
| 193 | if (bt_ctf_field_type(field) == CTF_TYPE_ARRAY) { |
| 194 | struct definition_array *array_definition; |
| 195 | array_definition = container_of(field, |
| 196 | struct definition_array, p); |
| 197 | ret = array_index(array_definition, index); |
| 198 | } else if (bt_ctf_field_type(field) == CTF_TYPE_SEQUENCE) { |
| 199 | struct definition_sequence *sequence_definition; |
| 200 | sequence_definition = container_of(field, |
| 201 | struct definition_sequence, p); |
| 202 | ret = sequence_index(sequence_definition, index); |
| 203 | } |
| 204 | return ret; |
| 205 | } |
| 206 | |
| 207 | const char *bt_ctf_event_name(struct bt_ctf_event *event) |
| 208 | { |
| 209 | struct ctf_event *event_class; |
| 210 | struct ctf_stream_class *stream_class; |
| 211 | |
| 212 | if (!event) |
| 213 | return NULL; |
| 214 | stream_class = event->stream->stream_class; |
| 215 | event_class = g_ptr_array_index(stream_class->events_by_id, |
| 216 | event->stream->event_id); |
| 217 | return g_quark_to_string(event_class->name); |
| 218 | } |
| 219 | |
| 220 | const char *bt_ctf_field_name(const struct definition *def) |
| 221 | { |
| 222 | if (def) |
| 223 | return g_quark_to_string(def->name); |
| 224 | return NULL; |
| 225 | } |
| 226 | |
| 227 | enum ctf_type_id bt_ctf_field_type(struct definition *def) |
| 228 | { |
| 229 | if (def) |
| 230 | return def->declaration->id; |
| 231 | return CTF_TYPE_UNKNOWN; |
| 232 | } |
| 233 | |
| 234 | int bt_ctf_get_field_list(struct bt_ctf_event *event, |
| 235 | struct definition *scope, |
| 236 | struct definition const * const **list, |
| 237 | unsigned int *count) |
| 238 | { |
| 239 | switch (bt_ctf_field_type(scope)) { |
| 240 | case CTF_TYPE_INTEGER: |
| 241 | case CTF_TYPE_FLOAT: |
| 242 | case CTF_TYPE_STRING: |
| 243 | case CTF_TYPE_ENUM: |
| 244 | goto error; |
| 245 | case CTF_TYPE_STRUCT: |
| 246 | { |
| 247 | struct definition_struct *def_struct; |
| 248 | |
| 249 | def_struct = container_of(scope, struct definition_struct, p); |
| 250 | if (!def_struct) |
| 251 | goto error; |
| 252 | if (def_struct->fields->pdata) { |
| 253 | *list = (struct definition const* const*) def_struct->fields->pdata; |
| 254 | *count = def_struct->fields->len; |
| 255 | goto end; |
| 256 | } else { |
| 257 | goto error; |
| 258 | } |
| 259 | } |
| 260 | case CTF_TYPE_UNTAGGED_VARIANT: |
| 261 | goto error; |
| 262 | case CTF_TYPE_VARIANT: |
| 263 | { |
| 264 | struct definition_variant *def_variant; |
| 265 | |
| 266 | def_variant = container_of(scope, struct definition_variant, p); |
| 267 | if (!def_variant) |
| 268 | goto error; |
| 269 | if (def_variant->fields->pdata) { |
| 270 | *list = (struct definition const* const*) def_variant->fields->pdata; |
| 271 | *count = def_variant->fields->len; |
| 272 | goto end; |
| 273 | } else { |
| 274 | goto error; |
| 275 | } |
| 276 | } |
| 277 | case CTF_TYPE_ARRAY: |
| 278 | { |
| 279 | struct definition_array *def_array; |
| 280 | |
| 281 | def_array = container_of(scope, struct definition_array, p); |
| 282 | if (!def_array) |
| 283 | goto error; |
| 284 | if (def_array->elems->pdata) { |
| 285 | *list = (struct definition const* const*) def_array->elems->pdata; |
| 286 | *count = def_array->elems->len; |
| 287 | goto end; |
| 288 | } else { |
| 289 | goto error; |
| 290 | } |
| 291 | } |
| 292 | case CTF_TYPE_SEQUENCE: |
| 293 | { |
| 294 | struct definition_sequence *def_sequence; |
| 295 | |
| 296 | def_sequence = container_of(scope, struct definition_sequence, p); |
| 297 | if (!def_sequence) |
| 298 | goto error; |
| 299 | if (def_sequence->elems->pdata) { |
| 300 | *list = (struct definition const* const*) def_sequence->elems->pdata; |
| 301 | *count = def_sequence->elems->len; |
| 302 | goto end; |
| 303 | } else { |
| 304 | goto error; |
| 305 | } |
| 306 | } |
| 307 | default: |
| 308 | break; |
| 309 | } |
| 310 | |
| 311 | end: |
| 312 | return 0; |
| 313 | |
| 314 | error: |
| 315 | *list = NULL; |
| 316 | *count = 0; |
| 317 | return -1; |
| 318 | } |
| 319 | |
| 320 | uint64_t bt_ctf_get_timestamp(struct bt_ctf_event *event) |
| 321 | { |
| 322 | if (event && event->stream->has_timestamp) |
| 323 | return event->stream->timestamp; |
| 324 | else |
| 325 | return 0; |
| 326 | } |
| 327 | |
| 328 | static void bt_ctf_field_set_error(int error) |
| 329 | { |
| 330 | bt_ctf_last_field_error = error; |
| 331 | } |
| 332 | |
| 333 | int bt_ctf_field_get_error(void) |
| 334 | { |
| 335 | int ret; |
| 336 | ret = bt_ctf_last_field_error; |
| 337 | bt_ctf_last_field_error = 0; |
| 338 | |
| 339 | return ret; |
| 340 | } |
| 341 | |
| 342 | uint64_t bt_ctf_get_uint64(struct definition *field) |
| 343 | { |
| 344 | unsigned int ret = 0; |
| 345 | |
| 346 | if (field && bt_ctf_field_type(field) == CTF_TYPE_INTEGER) |
| 347 | ret = get_unsigned_int(field); |
| 348 | else |
| 349 | bt_ctf_field_set_error(-EINVAL); |
| 350 | |
| 351 | return ret; |
| 352 | } |
| 353 | |
| 354 | int64_t bt_ctf_get_int64(struct definition *field) |
| 355 | { |
| 356 | int ret = 0; |
| 357 | |
| 358 | if (field && bt_ctf_field_type(field) == CTF_TYPE_INTEGER) |
| 359 | ret = get_signed_int(field); |
| 360 | else |
| 361 | bt_ctf_field_set_error(-EINVAL); |
| 362 | |
| 363 | return ret; |
| 364 | |
| 365 | } |
| 366 | |
| 367 | char *bt_ctf_get_char_array(struct definition *field) |
| 368 | { |
| 369 | char *ret = NULL; |
| 370 | |
| 371 | if (field && bt_ctf_field_type(field) == CTF_TYPE_ARRAY) |
| 372 | ret = get_char_array(field)->str; |
| 373 | else |
| 374 | bt_ctf_field_set_error(-EINVAL); |
| 375 | |
| 376 | return ret; |
| 377 | } |
| 378 | |
| 379 | char *bt_ctf_get_string(struct definition *field) |
| 380 | { |
| 381 | char *ret = NULL; |
| 382 | |
| 383 | if (field && bt_ctf_field_type(field) == CTF_TYPE_STRING) |
| 384 | ret = get_string(field); |
| 385 | else |
| 386 | bt_ctf_field_set_error(-EINVAL); |
| 387 | |
| 388 | return ret; |
| 389 | } |