| 1 | /* |
| 2 | * Copyright (C) 2009 Steven Rostedt <srostedt@redhat.com> |
| 3 | * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 4 | * |
| 5 | * This library is free software; you can redistribute it and/or |
| 6 | * modify it under the terms of the GNU Lesser General Public |
| 7 | * License as published by the Free Software Foundation; |
| 8 | * version 2.1 of the License. |
| 9 | * |
| 10 | * This library is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | * Lesser General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU Lesser General Public |
| 16 | * License along with this library; if not, write to the Free Software |
| 17 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 18 | */ |
| 19 | |
| 20 | #include <stdio.h> |
| 21 | #include <urcu/compiler.h> |
| 22 | #include <ust/lttng-events.h> |
| 23 | #include <ust/ringbuffer-config.h> |
| 24 | |
| 25 | /* |
| 26 | * Macro declarations used for all stages. |
| 27 | */ |
| 28 | |
| 29 | #undef ctf_integer |
| 30 | #define ctf_integer(_type, _item, _src) \ |
| 31 | ctf_integer_ext(_type, _item, _src, BYTE_ORDER, 10) |
| 32 | |
| 33 | #undef ctf_integer_hex |
| 34 | #define ctf_integer_hex(_type, _item, _src) \ |
| 35 | ctf_integer_ext(_type, _item, _src, BYTE_ORDER, 16) |
| 36 | |
| 37 | #undef ctf_integer_network |
| 38 | #define ctf_integer_network(_type, _item, _src) \ |
| 39 | ctf_integer_ext(_type, _item, _src, BIG_ENDIAN, 10) |
| 40 | |
| 41 | #undef ctf_integer_network_hex |
| 42 | #define ctf_integer_network_hex(_type, _item, _src) \ |
| 43 | ctf_integer_ext(_type, _item, _src, BIG_ENDIAN, 16) |
| 44 | |
| 45 | #undef ctf_array |
| 46 | #define ctf_array(_type, _item, _src, _length) \ |
| 47 | ctf_array_encoded(_type, _item, _src, _length, none) |
| 48 | |
| 49 | #undef ctf_array_text |
| 50 | #define ctf_array_text(_type, _item, _src, _length) \ |
| 51 | ctf_array_encoded(_type, _item, _src, _length, UTF8) |
| 52 | |
| 53 | #undef ctf_sequence |
| 54 | #define ctf_sequence(_type, _item, _src, _length_type, _src_length) \ |
| 55 | ctf_sequence_encoded(_type, _item, _src, \ |
| 56 | _length_type, _src_length, none) |
| 57 | |
| 58 | #undef ctf_sequence_text |
| 59 | #define ctf_sequence_text(_type, _item, _src, _length_type, _src_length) \ |
| 60 | ctf_sequence_encoded(_type, _item, _src, \ |
| 61 | _length_type, _src_length, UTF8) |
| 62 | |
| 63 | /* ctf_string is redefined at each step */ |
| 64 | |
| 65 | /* |
| 66 | * TRACEPOINT_EVENT_CLASS can be used to add a generic function handlers |
| 67 | * for events. That is, if all events have the same parameters and just |
| 68 | * have distinct trace points. Each tracepoint can be defined with |
| 69 | * TRACEPOINT_EVENT_INSTANCE and that will map the |
| 70 | * TRACEPOINT_EVENT_CLASS to the tracepoint. |
| 71 | * |
| 72 | * TRACEPOINT_EVENT is a one to one mapping between tracepoint and |
| 73 | * template. |
| 74 | */ |
| 75 | |
| 76 | #undef TRACEPOINT_EVENT |
| 77 | #define TRACEPOINT_EVENT(name, proto, args, fields) \ |
| 78 | TRACEPOINT_EVENT_CLASS(name, \ |
| 79 | TP_PARAMS(proto), \ |
| 80 | TP_PARAMS(args), \ |
| 81 | TP_PARAMS(fields)) \ |
| 82 | TRACEPOINT_EVENT_INSTANCE(name, name, TP_PARAMS(proto), TP_PARAMS(args)) |
| 83 | |
| 84 | #undef TRACEPOINT_EVENT_NOARGS |
| 85 | #define TRACEPOINT_EVENT_NOARGS(name, fields) \ |
| 86 | TRACEPOINT_EVENT_CLASS_NOARGS(name, \ |
| 87 | TP_PARAMS(fields)) \ |
| 88 | TRACEPOINT_EVENT_INSTANCE_NOARGS(name, name) |
| 89 | |
| 90 | /* Helpers */ |
| 91 | #define _TP_ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0])) |
| 92 | |
| 93 | /* |
| 94 | * Stage 1 of the trace events. |
| 95 | * |
| 96 | * Create event field type metadata section. |
| 97 | * Each event produce an array of fields. |
| 98 | */ |
| 99 | |
| 100 | /* Reset all macros within TRACEPOINT_EVENT */ |
| 101 | #include <ust/lttng-tracepoint-event-reset.h> |
| 102 | |
| 103 | /* Named field types must be defined in lttng-types.h */ |
| 104 | |
| 105 | #undef ctf_integer_ext |
| 106 | #define ctf_integer_ext(_type, _item, _src, _byte_order, _base) \ |
| 107 | { \ |
| 108 | .name = #_item, \ |
| 109 | .type = __type_integer(_type, _byte_order, _base, none),\ |
| 110 | }, |
| 111 | |
| 112 | #undef ctf_float |
| 113 | #define ctf_float(_type, _item, _src) \ |
| 114 | { \ |
| 115 | .name = #_item, \ |
| 116 | .type = __type_float(_type), \ |
| 117 | }, |
| 118 | |
| 119 | #undef ctf_array_encoded |
| 120 | #define ctf_array_encoded(_type, _item, _src, _length, _encoding) \ |
| 121 | { \ |
| 122 | .name = #_item, \ |
| 123 | .type = \ |
| 124 | { \ |
| 125 | .atype = atype_array, \ |
| 126 | .u.array = \ |
| 127 | { \ |
| 128 | .length = _length, \ |
| 129 | .elem_type = __type_integer(_type, BYTE_ORDER, 10, _encoding), \ |
| 130 | }, \ |
| 131 | }, \ |
| 132 | }, |
| 133 | |
| 134 | #undef ctf_sequence_encoded |
| 135 | #define ctf_sequence_encoded(_type, _item, _src, \ |
| 136 | _length_type, _src_length, _encoding) \ |
| 137 | { \ |
| 138 | .name = #_item, \ |
| 139 | .type = \ |
| 140 | { \ |
| 141 | .atype = atype_sequence, \ |
| 142 | .u.sequence = \ |
| 143 | { \ |
| 144 | .length_type = __type_integer(_length_type, BYTE_ORDER, 10, none), \ |
| 145 | .elem_type = __type_integer(_type, BYTE_ORDER, 10, _encoding), \ |
| 146 | }, \ |
| 147 | }, \ |
| 148 | }, |
| 149 | |
| 150 | #undef ctf_string |
| 151 | #define ctf_string(_item, _src) \ |
| 152 | { \ |
| 153 | .name = #_item, \ |
| 154 | .type = \ |
| 155 | { \ |
| 156 | .atype = atype_string, \ |
| 157 | .u.basic.string.encoding = lttng_encode_UTF8, \ |
| 158 | }, \ |
| 159 | }, |
| 160 | |
| 161 | #undef TP_FIELDS |
| 162 | #define TP_FIELDS(args...) args /* Only one used in this phase */ |
| 163 | |
| 164 | #undef TRACEPOINT_EVENT_CLASS_NOARGS |
| 165 | #define TRACEPOINT_EVENT_CLASS_NOARGS(_name, _fields) \ |
| 166 | static const struct lttng_event_field __event_fields___##_name[] = { \ |
| 167 | _fields \ |
| 168 | }; |
| 169 | |
| 170 | #undef TRACEPOINT_EVENT_CLASS |
| 171 | #define TRACEPOINT_EVENT_CLASS(_name, _proto, _args, _fields) \ |
| 172 | TRACEPOINT_EVENT_CLASS_NOARGS(_name, _fields) |
| 173 | |
| 174 | #include TRACEPOINT_INCLUDE(TRACEPOINT_INCLUDE_FILE) |
| 175 | |
| 176 | /* |
| 177 | * Stage 2 of the trace events. |
| 178 | * |
| 179 | * Create probe callback prototypes. |
| 180 | */ |
| 181 | |
| 182 | /* Reset all macros within TRACEPOINT_EVENT */ |
| 183 | #include <ust/lttng-tracepoint-event-reset.h> |
| 184 | |
| 185 | #undef TP_PROTO |
| 186 | #define TP_PROTO(args...) args |
| 187 | |
| 188 | #undef TRACEPOINT_EVENT_CLASS |
| 189 | #define TRACEPOINT_EVENT_CLASS(_name, _proto, _args, _fields) \ |
| 190 | static void __event_probe__##_name(void *__data, _proto); |
| 191 | |
| 192 | #undef TRACEPOINT_EVENT_CLASS_NOARGS |
| 193 | #define TRACEPOINT_EVENT_CLASS_NOARGS(_name, _fields) \ |
| 194 | static void __event_probe__##_name(void *__data); |
| 195 | |
| 196 | #include TRACEPOINT_INCLUDE(TRACEPOINT_INCLUDE_FILE) |
| 197 | |
| 198 | /* |
| 199 | * Stage 3 of the trace events. |
| 200 | * |
| 201 | * Create an array of events. |
| 202 | */ |
| 203 | |
| 204 | /* Named field types must be defined in lttng-types.h */ |
| 205 | |
| 206 | /* Reset all macros within TRACEPOINT_EVENT */ |
| 207 | #include <ust/lttng-tracepoint-event-reset.h> |
| 208 | |
| 209 | #undef TRACEPOINT_EVENT_INSTANCE_NOARGS |
| 210 | #define TRACEPOINT_EVENT_INSTANCE_NOARGS(_template, _name) \ |
| 211 | { \ |
| 212 | .fields = __event_fields___##_template, \ |
| 213 | .name = #_name, \ |
| 214 | .probe_callback = (void *) &__event_probe__##_template,\ |
| 215 | .nr_fields = _TP_ARRAY_SIZE(__event_fields___##_template), \ |
| 216 | }, |
| 217 | |
| 218 | #undef TRACEPOINT_EVENT_INSTANCE |
| 219 | #define TRACEPOINT_EVENT_INSTANCE(_template, _name, _proto, _args) \ |
| 220 | TRACEPOINT_EVENT_INSTANCE_NOARGS(_template, _name) |
| 221 | |
| 222 | #define TP_ID1(_token, _system) _token##_system |
| 223 | #define TP_ID(_token, _system) TP_ID1(_token, _system) |
| 224 | |
| 225 | static const struct lttng_event_desc TP_ID(__event_desc___, TRACEPOINT_SYSTEM)[] = { |
| 226 | #include TRACEPOINT_INCLUDE(TRACEPOINT_INCLUDE_FILE) |
| 227 | }; |
| 228 | |
| 229 | #undef TP_ID1 |
| 230 | #undef TP_ID |
| 231 | |
| 232 | |
| 233 | /* |
| 234 | * Stage 4 of the trace events. |
| 235 | * |
| 236 | * Create a toplevel descriptor for the whole probe. |
| 237 | */ |
| 238 | |
| 239 | #define TP_ID1(_token, _system) _token##_system |
| 240 | #define TP_ID(_token, _system) TP_ID1(_token, _system) |
| 241 | |
| 242 | /* non-const because list head will be modified when registered. */ |
| 243 | static struct lttng_probe_desc TP_ID(__probe_desc___, TRACEPOINT_SYSTEM) = { |
| 244 | .event_desc = TP_ID(__event_desc___, TRACEPOINT_SYSTEM), |
| 245 | .nr_events = _TP_ARRAY_SIZE(TP_ID(__event_desc___, TRACEPOINT_SYSTEM)), |
| 246 | }; |
| 247 | |
| 248 | #undef TP_ID1 |
| 249 | #undef TP_ID |
| 250 | |
| 251 | /* |
| 252 | * Stage 5 of the trace events. |
| 253 | * |
| 254 | * Create static inline function that calculates event size. |
| 255 | */ |
| 256 | |
| 257 | /* Reset all macros within TRACEPOINT_EVENT */ |
| 258 | #include <ust/lttng-tracepoint-event-reset.h> |
| 259 | |
| 260 | /* Named field types must be defined in lttng-types.h */ |
| 261 | |
| 262 | #undef ctf_integer_ext |
| 263 | #define ctf_integer_ext(_type, _item, _src, _byte_order, _base) \ |
| 264 | __event_len += lib_ring_buffer_align(__event_len, ltt_alignof(_type)); \ |
| 265 | __event_len += sizeof(_type); |
| 266 | |
| 267 | #undef ctf_float |
| 268 | #define ctf_float(_type, _item, _src) \ |
| 269 | __event_len += lib_ring_buffer_align(__event_len, ltt_alignof(_type)); \ |
| 270 | __event_len += sizeof(_type); |
| 271 | |
| 272 | #undef ctf_array_encoded |
| 273 | #define ctf_array_encoded(_type, _item, _src, _length) \ |
| 274 | __event_len += lib_ring_buffer_align(__event_len, ltt_alignof(_type)); \ |
| 275 | __event_len += sizeof(_type) * (_length); |
| 276 | |
| 277 | #undef ctf_sequence_encoded |
| 278 | #define ctf_sequence_encoded(_type, _item, _src, _length_type, \ |
| 279 | _src_length, _encoding) \ |
| 280 | __event_len += lib_ring_buffer_align(__event_len, ltt_alignof(_length_type)); \ |
| 281 | __event_len += sizeof(_length_type); \ |
| 282 | __event_len += lib_ring_buffer_align(__event_len, ltt_alignof(_type)); \ |
| 283 | __dynamic_len[__dynamic_len_idx] = (_length); \ |
| 284 | __event_len += sizeof(_type) * __dynamic_len[__dynamic_len_idx]; \ |
| 285 | __dynamic_len_idx++; |
| 286 | |
| 287 | #undef ctf_string |
| 288 | #define ctf_string(_item, _src) \ |
| 289 | __event_len += __dynamic_len[__dynamic_len_idx++] = strlen(_src) + 1; |
| 290 | |
| 291 | #undef TP_PROTO |
| 292 | #define TP_PROTO(args...) args |
| 293 | |
| 294 | #undef TP_FIELDS |
| 295 | #define TP_FIELDS(args...) args |
| 296 | |
| 297 | #undef TRACEPOINT_EVENT_CLASS |
| 298 | #define TRACEPOINT_EVENT_CLASS(_name, _proto, _args, _fields) \ |
| 299 | static inline size_t __event_get_size__##_name(size_t *__dynamic_len, _proto) \ |
| 300 | { \ |
| 301 | size_t __event_len = 0; \ |
| 302 | unsigned int __dynamic_len_idx = 0; \ |
| 303 | \ |
| 304 | if (0) \ |
| 305 | (void) __dynamic_len_idx; /* don't warn if unused */ \ |
| 306 | _fields \ |
| 307 | return __event_len; \ |
| 308 | } |
| 309 | |
| 310 | #undef TRACEPOINT_EVENT_CLASS_NOARGS |
| 311 | #define TRACEPOINT_EVENT_CLASS_NOARGS(_name, _fields) \ |
| 312 | static inline size_t __event_get_size__##_name(size_t *__dynamic_len) \ |
| 313 | { \ |
| 314 | size_t __event_len = 0; \ |
| 315 | unsigned int __dynamic_len_idx = 0; \ |
| 316 | \ |
| 317 | if (0) \ |
| 318 | (void) __dynamic_len_idx; /* don't warn if unused */ \ |
| 319 | _fields \ |
| 320 | return __event_len; \ |
| 321 | } |
| 322 | |
| 323 | #include TRACEPOINT_INCLUDE(TRACEPOINT_INCLUDE_FILE) |
| 324 | |
| 325 | /* |
| 326 | * Stage 6 of the trace events. |
| 327 | * |
| 328 | * Create static inline function that calculates event payload alignment. |
| 329 | */ |
| 330 | |
| 331 | /* Reset all macros within TRACEPOINT_EVENT */ |
| 332 | #include <ust/lttng-tracepoint-event-reset.h> |
| 333 | |
| 334 | /* Named field types must be defined in lttng-types.h */ |
| 335 | |
| 336 | #undef ctf_integer_ext |
| 337 | #define ctf_integer_ext(_type, _item, _src, _byte_order, _base) \ |
| 338 | __event_align = max_t(size_t, __event_align, ltt_alignof(_type)); |
| 339 | |
| 340 | #undef ctf_float |
| 341 | #define ctf_float(_type, _item, _src) \ |
| 342 | __event_align = max_t(size_t, __event_align, ltt_alignof(_type)); |
| 343 | |
| 344 | #undef ctf_array_encoded |
| 345 | #define ctf_array_encoded(_type, _item, _src, _length) \ |
| 346 | __event_align = max_t(size_t, __event_align, ltt_alignof(_type)); |
| 347 | |
| 348 | #undef ctf_sequence_encoded |
| 349 | #define ctf_sequence_encoded(_type, _item, _src, _length_type, \ |
| 350 | _src_length, _encoding) \ |
| 351 | __event_align = max_t(size_t, __event_align, ltt_alignof(_length_type)); \ |
| 352 | __event_align = max_t(size_t, __event_align, ltt_alignof(_type)); |
| 353 | |
| 354 | #undef ctf_string |
| 355 | #define ctf_string(_item, _src) |
| 356 | |
| 357 | #undef TP_PROTO |
| 358 | #define TP_PROTO(args...) args |
| 359 | |
| 360 | #undef TP_FIELDS |
| 361 | #define TP_FIELDS(args...) args |
| 362 | |
| 363 | #undef TRACEPOINT_EVENT_CLASS |
| 364 | #define TRACEPOINT_EVENT_CLASS(_name, _proto, _args, _fields) \ |
| 365 | static inline size_t __event_get_align__##_name(_proto) \ |
| 366 | { \ |
| 367 | size_t __event_align = 1; \ |
| 368 | _fields \ |
| 369 | return __event_align; \ |
| 370 | } |
| 371 | |
| 372 | #undef TRACEPOINT_EVENT_CLASS_NOARGS |
| 373 | #define TRACEPOINT_EVENT_CLASS_NOARGS(_name, _fields) \ |
| 374 | static inline size_t __event_get_align__##_name(void) \ |
| 375 | { \ |
| 376 | size_t __event_align = 1; \ |
| 377 | _fields \ |
| 378 | return __event_align; \ |
| 379 | } |
| 380 | |
| 381 | #include TRACEPOINT_INCLUDE(TRACEPOINT_INCLUDE_FILE) |
| 382 | |
| 383 | |
| 384 | /* |
| 385 | * Stage 7 of the trace events. |
| 386 | * |
| 387 | * Create the probe function : call even size calculation and write event data |
| 388 | * into the buffer. |
| 389 | * |
| 390 | * We use both the field and assignment macros to write the fields in the order |
| 391 | * defined in the field declaration. The field declarations control the |
| 392 | * execution order, jumping to the appropriate assignment block. |
| 393 | */ |
| 394 | |
| 395 | /* Reset all macros within TRACEPOINT_EVENT */ |
| 396 | #include <ust/lttng-tracepoint-event-reset.h> |
| 397 | |
| 398 | #undef ctf_integer_ext |
| 399 | #define ctf_integer_ext(_type, _item, _src, _byte_order, _base) \ |
| 400 | { \ |
| 401 | _type __tmp = (_src); \ |
| 402 | lib_ring_buffer_align_ctx(&ctx, ltt_alignof(__tmp)); \ |
| 403 | __chan->ops->event_write(&ctx, &__tmp, sizeof(__tmp)); \ |
| 404 | } |
| 405 | |
| 406 | #undef ctf_float |
| 407 | #define ctf_float(_type, _item, _src) \ |
| 408 | { \ |
| 409 | _type __tmp = (_src); \ |
| 410 | lib_ring_buffer_align_ctx(&ctx, ltt_alignof(__tmp)); \ |
| 411 | __chan->ops->event_write(&ctx, &__tmp, sizeof(__tmp)); \ |
| 412 | } |
| 413 | |
| 414 | #undef ctf_array_encoded |
| 415 | #define ctf_array_encoded(_type, _item, _src, _length) \ |
| 416 | lib_ring_buffer_align_ctx(&ctx, ltt_alignof(_type)); \ |
| 417 | __chan->ops->event_write(&ctx, _src, _length); |
| 418 | |
| 419 | #undef ctf_sequence_encoded |
| 420 | #define ctf_sequence_encoded(_type, _item, _src, _length_type, \ |
| 421 | _src_length, _encoding) \ |
| 422 | { \ |
| 423 | _length_type __tmpl = __dynamic_len[__dynamic_len_idx]; \ |
| 424 | lib_ring_buffer_align_ctx(&ctx, ltt_alignof(_length_type)); \ |
| 425 | __chan->ops->event_write(&ctx, &__tmpl, sizeof(_length_type)); \ |
| 426 | } \ |
| 427 | lib_ring_buffer_align_ctx(&ctx, ltt_alignof(_type)); \ |
| 428 | __chan->ops->event_write(&ctx, _src, \ |
| 429 | sizeof(_type) * __get_sequence_len(dest)); |
| 430 | |
| 431 | #undef ctf_string |
| 432 | #define ctf_string(_item, _src) \ |
| 433 | tp_memcpy(dest, _src, __get_sequence_len(dest)) |
| 434 | |
| 435 | /* Beware: this get len actually consumes the len value */ |
| 436 | #undef __get_sequence_len |
| 437 | #define __get_sequence_len(field) __dynamic_len[__dynamic_len_idx++] |
| 438 | |
| 439 | #undef TP_PROTO |
| 440 | #define TP_PROTO(args...) args |
| 441 | |
| 442 | #undef TP_ARGS |
| 443 | #define TP_ARGS(args...) args |
| 444 | |
| 445 | #undef TP_FIELDS |
| 446 | #define TP_FIELDS(args...) args |
| 447 | |
| 448 | #undef TRACEPOINT_EVENT_CLASS |
| 449 | #define TRACEPOINT_EVENT_CLASS(_name, _proto, _args, _fields) \ |
| 450 | static void __event_probe__##_name(void *__data, _proto) \ |
| 451 | { \ |
| 452 | struct ltt_event *__event = __data; \ |
| 453 | struct ltt_channel *__chan = __event->chan; \ |
| 454 | struct lib_ring_buffer_ctx ctx; \ |
| 455 | size_t __event_len, __event_align; \ |
| 456 | size_t __dynamic_len_idx = 0; \ |
| 457 | size_t __dynamic_len[_TP_ARRAY_SIZE(__event_fields___##_name)]; \ |
| 458 | int __ret; \ |
| 459 | \ |
| 460 | if (0) \ |
| 461 | (void) __dynamic_len_idx; /* don't warn if unused */ \ |
| 462 | if (unlikely(!CMM_ACCESS_ONCE(__chan->session->active))) \ |
| 463 | return; \ |
| 464 | if (unlikely(!CMM_ACCESS_ONCE(__chan->enabled))) \ |
| 465 | return; \ |
| 466 | if (unlikely(!CMM_ACCESS_ONCE(__event->enabled))) \ |
| 467 | return; \ |
| 468 | __event_len = __event_get_size__##_name(__dynamic_len, _args); \ |
| 469 | __event_align = __event_get_align__##_name(_args); \ |
| 470 | lib_ring_buffer_ctx_init(&ctx, __chan->chan, __event, __event_len, \ |
| 471 | __event_align, -1); \ |
| 472 | __ret = __chan->ops->event_reserve(&ctx, __event->id); \ |
| 473 | if (__ret < 0) \ |
| 474 | return; \ |
| 475 | _fields \ |
| 476 | __chan->ops->event_commit(&ctx); \ |
| 477 | } |
| 478 | |
| 479 | #undef TRACEPOINT_EVENT_CLASS_NOARGS |
| 480 | #define TRACEPOINT_EVENT_CLASS_NOARGS(_name, _fields) \ |
| 481 | static void __event_probe__##_name(void *__data) \ |
| 482 | { \ |
| 483 | struct ltt_event *__event = __data; \ |
| 484 | struct ltt_channel *__chan = __event->chan; \ |
| 485 | struct lib_ring_buffer_ctx ctx; \ |
| 486 | size_t __event_len, __event_align; \ |
| 487 | size_t __dynamic_len_idx = 0; \ |
| 488 | size_t __dynamic_len[_TP_ARRAY_SIZE(__event_fields___##_name)]; \ |
| 489 | int __ret; \ |
| 490 | \ |
| 491 | if (0) \ |
| 492 | (void) __dynamic_len_idx; /* don't warn if unused */ \ |
| 493 | if (unlikely(!CMM_ACCESS_ONCE(__chan->session->active))) \ |
| 494 | return; \ |
| 495 | if (unlikely(!CMM_ACCESS_ONCE(__chan->enabled))) \ |
| 496 | return; \ |
| 497 | if (unlikely(!CMM_ACCESS_ONCE(__event->enabled))) \ |
| 498 | return; \ |
| 499 | __event_len = __event_get_size__##_name(__dynamic_len); \ |
| 500 | __event_align = __event_get_align__##_name(); \ |
| 501 | lib_ring_buffer_ctx_init(&ctx, __chan->chan, __event, __event_len, \ |
| 502 | __event_align, -1); \ |
| 503 | __ret = __chan->ops->event_reserve(&ctx, __event->id); \ |
| 504 | if (__ret < 0) \ |
| 505 | return; \ |
| 506 | _fields \ |
| 507 | __chan->ops->event_commit(&ctx); \ |
| 508 | } |
| 509 | |
| 510 | #include TRACEPOINT_INCLUDE(TRACEPOINT_INCLUDE_FILE) |
| 511 | |
| 512 | /* |
| 513 | * Stage 8 of the trace events. |
| 514 | * |
| 515 | * Register/unregister probes at module load/unload. |
| 516 | */ |
| 517 | |
| 518 | /* Reset all macros within TRACEPOINT_EVENT */ |
| 519 | #include <ust/lttng-tracepoint-event-reset.h> |
| 520 | |
| 521 | #define TP_ID1(_token, _system) _token##_system |
| 522 | #define TP_ID(_token, _system) TP_ID1(_token, _system) |
| 523 | |
| 524 | static void __attribute__((constructor)) |
| 525 | TP_ID(__lttng_events_init__, TRACEPOINT_SYSTEM)(void) |
| 526 | { |
| 527 | int ret; |
| 528 | |
| 529 | ret = ltt_probe_register(&TP_ID(__probe_desc___, TRACEPOINT_SYSTEM)); |
| 530 | assert(!ret); |
| 531 | } |
| 532 | |
| 533 | static void __attribute__((destructor)) |
| 534 | TP_ID(__lttng_events_exit__, TRACEPOINT_SYSTEM)(void) |
| 535 | { |
| 536 | ltt_probe_unregister(&TP_ID(__probe_desc___, TRACEPOINT_SYSTEM)); |
| 537 | } |
| 538 | |
| 539 | #undef TP_ID1 |
| 540 | #undef TP_ID |