| 1 | /* |
| 2 | * stream.c |
| 3 | * |
| 4 | * Babeltrace CTF Writer |
| 5 | * |
| 6 | * Copyright 2013, 2014 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
| 7 | * |
| 8 | * Author: Jérémie Galarneau <jeremie.galarneau@efficios.com> |
| 9 | * |
| 10 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 11 | * of this software and associated documentation files (the "Software"), to deal |
| 12 | * in the Software without restriction, including without limitation the rights |
| 13 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 14 | * copies of the Software, and to permit persons to whom the Software is |
| 15 | * furnished to do so, subject to the following conditions: |
| 16 | * |
| 17 | * The above copyright notice and this permission notice shall be included in |
| 18 | * all copies or substantial portions of the Software. |
| 19 | * |
| 20 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 21 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 22 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 23 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 24 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 25 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 26 | * SOFTWARE. |
| 27 | */ |
| 28 | |
| 29 | #include <babeltrace/ctf-writer/clock.h> |
| 30 | #include <babeltrace/ctf-ir/clock-internal.h> |
| 31 | #include <babeltrace/ctf-writer/event.h> |
| 32 | #include <babeltrace/ctf-ir/event-internal.h> |
| 33 | #include <babeltrace/ctf-ir/event-types-internal.h> |
| 34 | #include <babeltrace/ctf-ir/event-fields-internal.h> |
| 35 | #include <babeltrace/ctf-writer/stream.h> |
| 36 | #include <babeltrace/ctf-ir/stream-class-internal.h> |
| 37 | #include <babeltrace/ctf-writer/functor-internal.h> |
| 38 | #include <babeltrace/compiler.h> |
| 39 | #include <babeltrace/align.h> |
| 40 | |
| 41 | static |
| 42 | void bt_ctf_stream_class_destroy(struct bt_ctf_ref *ref); |
| 43 | static |
| 44 | int init_event_header(struct bt_ctf_stream_class *stream_class, |
| 45 | enum bt_ctf_byte_order byte_order); |
| 46 | static |
| 47 | int init_packet_context(struct bt_ctf_stream_class *stream_class, |
| 48 | enum bt_ctf_byte_order byte_order); |
| 49 | |
| 50 | struct bt_ctf_stream_class *bt_ctf_stream_class_create(const char *name) |
| 51 | { |
| 52 | struct bt_ctf_stream_class *stream_class = NULL; |
| 53 | |
| 54 | if (!name || !strlen(name)) { |
| 55 | goto error; |
| 56 | } |
| 57 | |
| 58 | stream_class = g_new0(struct bt_ctf_stream_class, 1); |
| 59 | if (!stream_class) { |
| 60 | goto error; |
| 61 | } |
| 62 | |
| 63 | stream_class->name = g_string_new(name); |
| 64 | stream_class->event_classes = g_ptr_array_new_with_free_func( |
| 65 | (GDestroyNotify)bt_ctf_event_class_put); |
| 66 | if (!stream_class->event_classes) { |
| 67 | goto error_destroy; |
| 68 | } |
| 69 | |
| 70 | bt_ctf_ref_init(&stream_class->ref_count); |
| 71 | return stream_class; |
| 72 | |
| 73 | error_destroy: |
| 74 | bt_ctf_stream_class_destroy(&stream_class->ref_count); |
| 75 | stream_class = NULL; |
| 76 | error: |
| 77 | return stream_class; |
| 78 | } |
| 79 | |
| 80 | int bt_ctf_stream_class_set_clock(struct bt_ctf_stream_class *stream_class, |
| 81 | struct bt_ctf_clock *clock) |
| 82 | { |
| 83 | int ret = 0; |
| 84 | |
| 85 | if (!stream_class || !clock || stream_class->frozen) { |
| 86 | ret = -1; |
| 87 | goto end; |
| 88 | } |
| 89 | |
| 90 | if (stream_class->clock) { |
| 91 | bt_ctf_clock_put(stream_class->clock); |
| 92 | } |
| 93 | |
| 94 | stream_class->clock = clock; |
| 95 | bt_ctf_clock_get(clock); |
| 96 | end: |
| 97 | return ret; |
| 98 | } |
| 99 | |
| 100 | int bt_ctf_stream_class_add_event_class( |
| 101 | struct bt_ctf_stream_class *stream_class, |
| 102 | struct bt_ctf_event_class *event_class) |
| 103 | { |
| 104 | int ret = 0; |
| 105 | |
| 106 | if (!stream_class || !event_class) { |
| 107 | ret = -1; |
| 108 | goto end; |
| 109 | } |
| 110 | |
| 111 | /* Check for duplicate event classes */ |
| 112 | struct search_query query = { .value = event_class, .found = 0 }; |
| 113 | g_ptr_array_foreach(stream_class->event_classes, value_exists, &query); |
| 114 | if (query.found) { |
| 115 | ret = -1; |
| 116 | goto end; |
| 117 | } |
| 118 | |
| 119 | if (bt_ctf_event_class_set_id(event_class, |
| 120 | stream_class->next_event_id++)) { |
| 121 | /* The event is already associated to a stream class */ |
| 122 | ret = -1; |
| 123 | goto end; |
| 124 | } |
| 125 | |
| 126 | bt_ctf_event_class_get(event_class); |
| 127 | g_ptr_array_add(stream_class->event_classes, event_class); |
| 128 | end: |
| 129 | return ret; |
| 130 | } |
| 131 | |
| 132 | void bt_ctf_stream_class_get(struct bt_ctf_stream_class *stream_class) |
| 133 | { |
| 134 | if (!stream_class) { |
| 135 | return; |
| 136 | } |
| 137 | |
| 138 | bt_ctf_ref_get(&stream_class->ref_count); |
| 139 | } |
| 140 | |
| 141 | void bt_ctf_stream_class_put(struct bt_ctf_stream_class *stream_class) |
| 142 | { |
| 143 | if (!stream_class) { |
| 144 | return; |
| 145 | } |
| 146 | |
| 147 | bt_ctf_ref_put(&stream_class->ref_count, bt_ctf_stream_class_destroy); |
| 148 | } |
| 149 | |
| 150 | BT_HIDDEN |
| 151 | void bt_ctf_stream_class_freeze(struct bt_ctf_stream_class *stream_class) |
| 152 | { |
| 153 | if (!stream_class) { |
| 154 | return; |
| 155 | } |
| 156 | |
| 157 | stream_class->frozen = 1; |
| 158 | bt_ctf_clock_freeze(stream_class->clock); |
| 159 | g_ptr_array_foreach(stream_class->event_classes, |
| 160 | (GFunc)bt_ctf_event_class_freeze, NULL); |
| 161 | } |
| 162 | |
| 163 | BT_HIDDEN |
| 164 | int bt_ctf_stream_class_set_id(struct bt_ctf_stream_class *stream_class, |
| 165 | uint32_t id) |
| 166 | { |
| 167 | int ret = 0; |
| 168 | |
| 169 | if (!stream_class || |
| 170 | (stream_class->id_set && (id != stream_class->id))) { |
| 171 | ret = -1; |
| 172 | goto end; |
| 173 | } |
| 174 | |
| 175 | stream_class->id = id; |
| 176 | stream_class->id_set = 1; |
| 177 | end: |
| 178 | return ret; |
| 179 | } |
| 180 | |
| 181 | BT_HIDDEN |
| 182 | int bt_ctf_stream_class_set_byte_order(struct bt_ctf_stream_class *stream_class, |
| 183 | enum bt_ctf_byte_order byte_order) |
| 184 | { |
| 185 | int ret = 0; |
| 186 | |
| 187 | ret = init_packet_context(stream_class, byte_order); |
| 188 | if (ret) { |
| 189 | goto end; |
| 190 | } |
| 191 | |
| 192 | ret = init_event_header(stream_class, byte_order); |
| 193 | if (ret) { |
| 194 | goto end; |
| 195 | } |
| 196 | end: |
| 197 | return ret; |
| 198 | } |
| 199 | |
| 200 | BT_HIDDEN |
| 201 | int bt_ctf_stream_class_serialize(struct bt_ctf_stream_class *stream_class, |
| 202 | struct metadata_context *context) |
| 203 | { |
| 204 | int ret = 0; |
| 205 | size_t i; |
| 206 | |
| 207 | g_string_assign(context->field_name, ""); |
| 208 | context->current_indentation_level = 1; |
| 209 | if (!stream_class->id_set) { |
| 210 | ret = -1; |
| 211 | goto end; |
| 212 | } |
| 213 | |
| 214 | g_string_append_printf(context->string, |
| 215 | "stream {\n\tid = %" PRIu32 ";\n\tevent.header := ", |
| 216 | stream_class->id); |
| 217 | ret = bt_ctf_field_type_serialize(stream_class->event_header_type, |
| 218 | context); |
| 219 | if (ret) { |
| 220 | goto end; |
| 221 | } |
| 222 | |
| 223 | g_string_append(context->string, ";\n\n\tpacket.context := "); |
| 224 | ret = bt_ctf_field_type_serialize(stream_class->packet_context_type, |
| 225 | context); |
| 226 | if (ret) { |
| 227 | goto end; |
| 228 | } |
| 229 | |
| 230 | if (stream_class->event_context_type) { |
| 231 | g_string_append(context->string, ";\n\n\tevent.context := "); |
| 232 | ret = bt_ctf_field_type_serialize( |
| 233 | stream_class->event_context_type, context); |
| 234 | if (ret) { |
| 235 | goto end; |
| 236 | } |
| 237 | } |
| 238 | |
| 239 | g_string_append(context->string, ";\n};\n\n"); |
| 240 | |
| 241 | /* Assign this stream's ID to every event and serialize them */ |
| 242 | g_ptr_array_foreach(stream_class->event_classes, |
| 243 | (GFunc) bt_ctf_event_class_set_stream_id, |
| 244 | GUINT_TO_POINTER(stream_class->id)); |
| 245 | for (i = 0; i < stream_class->event_classes->len; i++) { |
| 246 | struct bt_ctf_event_class *event_class = |
| 247 | stream_class->event_classes->pdata[i]; |
| 248 | |
| 249 | ret = bt_ctf_event_class_set_stream_id(event_class, |
| 250 | stream_class->id); |
| 251 | if (ret) { |
| 252 | goto end; |
| 253 | } |
| 254 | |
| 255 | ret = bt_ctf_event_class_serialize(event_class, context); |
| 256 | if (ret) { |
| 257 | goto end; |
| 258 | } |
| 259 | } |
| 260 | end: |
| 261 | context->current_indentation_level = 0; |
| 262 | return ret; |
| 263 | } |
| 264 | |
| 265 | static |
| 266 | void bt_ctf_stream_class_destroy(struct bt_ctf_ref *ref) |
| 267 | { |
| 268 | struct bt_ctf_stream_class *stream_class; |
| 269 | |
| 270 | if (!ref) { |
| 271 | return; |
| 272 | } |
| 273 | |
| 274 | stream_class = container_of(ref, struct bt_ctf_stream_class, ref_count); |
| 275 | bt_ctf_clock_put(stream_class->clock); |
| 276 | |
| 277 | if (stream_class->event_classes) { |
| 278 | g_ptr_array_free(stream_class->event_classes, TRUE); |
| 279 | } |
| 280 | |
| 281 | if (stream_class->name) { |
| 282 | g_string_free(stream_class->name, TRUE); |
| 283 | } |
| 284 | |
| 285 | bt_ctf_field_type_put(stream_class->event_header_type); |
| 286 | bt_ctf_field_put(stream_class->event_header); |
| 287 | bt_ctf_field_type_put(stream_class->packet_context_type); |
| 288 | bt_ctf_field_put(stream_class->packet_context); |
| 289 | bt_ctf_field_type_put(stream_class->event_context_type); |
| 290 | bt_ctf_field_put(stream_class->event_context); |
| 291 | g_free(stream_class); |
| 292 | } |
| 293 | |
| 294 | static |
| 295 | int init_event_header(struct bt_ctf_stream_class *stream_class, |
| 296 | enum bt_ctf_byte_order byte_order) |
| 297 | { |
| 298 | int ret = 0; |
| 299 | struct bt_ctf_field_type *event_header_type = |
| 300 | bt_ctf_field_type_structure_create(); |
| 301 | struct bt_ctf_field_type *_uint32_t = |
| 302 | get_field_type(FIELD_TYPE_ALIAS_UINT32_T); |
| 303 | struct bt_ctf_field_type *_uint64_t = |
| 304 | get_field_type(FIELD_TYPE_ALIAS_UINT64_T); |
| 305 | |
| 306 | if (!event_header_type) { |
| 307 | ret = -1; |
| 308 | goto end; |
| 309 | } |
| 310 | |
| 311 | ret = bt_ctf_field_type_set_byte_order(_uint32_t, byte_order); |
| 312 | if (ret) { |
| 313 | goto end; |
| 314 | } |
| 315 | |
| 316 | ret = bt_ctf_field_type_set_byte_order(_uint64_t, byte_order); |
| 317 | if (ret) { |
| 318 | goto end; |
| 319 | } |
| 320 | |
| 321 | ret = bt_ctf_field_type_structure_add_field(event_header_type, |
| 322 | _uint32_t, "id"); |
| 323 | if (ret) { |
| 324 | goto end; |
| 325 | } |
| 326 | |
| 327 | ret = bt_ctf_field_type_structure_add_field(event_header_type, |
| 328 | _uint64_t, "timestamp"); |
| 329 | if (ret) { |
| 330 | goto end; |
| 331 | } |
| 332 | |
| 333 | stream_class->event_header_type = event_header_type; |
| 334 | stream_class->event_header = bt_ctf_field_create( |
| 335 | stream_class->event_header_type); |
| 336 | if (!stream_class->event_header) { |
| 337 | ret = -1; |
| 338 | } |
| 339 | end: |
| 340 | if (ret) { |
| 341 | bt_ctf_field_type_put(event_header_type); |
| 342 | } |
| 343 | |
| 344 | bt_ctf_field_type_put(_uint32_t); |
| 345 | bt_ctf_field_type_put(_uint64_t); |
| 346 | return ret; |
| 347 | } |
| 348 | |
| 349 | static |
| 350 | int init_packet_context(struct bt_ctf_stream_class *stream_class, |
| 351 | enum bt_ctf_byte_order byte_order) |
| 352 | { |
| 353 | int ret = 0; |
| 354 | struct bt_ctf_field_type *packet_context_type = |
| 355 | bt_ctf_field_type_structure_create(); |
| 356 | struct bt_ctf_field_type *_uint64_t = |
| 357 | get_field_type(FIELD_TYPE_ALIAS_UINT64_T); |
| 358 | |
| 359 | if (!packet_context_type) { |
| 360 | ret = -1; |
| 361 | goto end; |
| 362 | } |
| 363 | |
| 364 | /* |
| 365 | * We create a stream packet context as proposed in the CTF |
| 366 | * specification. |
| 367 | */ |
| 368 | ret = bt_ctf_field_type_set_byte_order(_uint64_t, byte_order); |
| 369 | if (ret) { |
| 370 | goto end; |
| 371 | } |
| 372 | |
| 373 | ret = bt_ctf_field_type_structure_add_field(packet_context_type, |
| 374 | _uint64_t, "timestamp_begin"); |
| 375 | if (ret) { |
| 376 | goto end; |
| 377 | } |
| 378 | |
| 379 | ret = bt_ctf_field_type_structure_add_field(packet_context_type, |
| 380 | _uint64_t, "timestamp_end"); |
| 381 | if (ret) { |
| 382 | goto end; |
| 383 | } |
| 384 | |
| 385 | ret = bt_ctf_field_type_structure_add_field(packet_context_type, |
| 386 | _uint64_t, "content_size"); |
| 387 | if (ret) { |
| 388 | goto end; |
| 389 | } |
| 390 | |
| 391 | ret = bt_ctf_field_type_structure_add_field(packet_context_type, |
| 392 | _uint64_t, "packet_size"); |
| 393 | if (ret) { |
| 394 | goto end; |
| 395 | } |
| 396 | |
| 397 | ret = bt_ctf_field_type_structure_add_field(packet_context_type, |
| 398 | _uint64_t, "events_discarded"); |
| 399 | if (ret) { |
| 400 | goto end; |
| 401 | } |
| 402 | |
| 403 | stream_class->packet_context_type = packet_context_type; |
| 404 | stream_class->packet_context = bt_ctf_field_create(packet_context_type); |
| 405 | if (!stream_class->packet_context) { |
| 406 | ret = -1; |
| 407 | } |
| 408 | end: |
| 409 | if (ret) { |
| 410 | bt_ctf_field_type_put(packet_context_type); |
| 411 | goto end; |
| 412 | } |
| 413 | |
| 414 | bt_ctf_field_type_put(_uint64_t); |
| 415 | return ret; |
| 416 | } |