include/lttng/ust-tracepoint-event.h

   1 /*
   2  * Copyright (c) 2011-2012 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a copy
   5  * of this software and associated documentation files (the "Software"), to deal
   6  * in the Software without restriction, including without limitation the rights
   7  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   8  * copies of the Software, and to permit persons to whom the Software is
   9  * furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  */
  14
  15 #include <stdio.h>
  16 #include <urcu/compiler.h>
  17 #include <lttng/ust-events.h>
  18 #include <lttng/ringbuffer-config.h>
  19 #include <string.h>
  20
  21 /*
  22  * Macro declarations used for all stages.
  23  */
  24
  25 #undef ctf_integer
  26 #define ctf_integer(_type, _item, _src)                         \
  27         ctf_integer_ext(_type, _item, _src, BYTE_ORDER, 10)
  28
  29 #undef ctf_integer_hex
  30 #define ctf_integer_hex(_type, _item, _src)                     \
  31         ctf_integer_ext(_type, _item, _src, BYTE_ORDER, 16)
  32
  33 #undef ctf_integer_network
  34 #define ctf_integer_network(_type, _item, _src)                 \
  35         ctf_integer_ext(_type, _item, _src, BIG_ENDIAN, 10)
  36
  37 #undef ctf_integer_network_hex
  38 #define ctf_integer_network_hex(_type, _item, _src)             \
  39         ctf_integer_ext(_type, _item, _src, BIG_ENDIAN, 16)
  40
  41 /* ctf_float is redefined at each step */
  42
  43 #undef ctf_array
  44 #define ctf_array(_type, _item, _src, _length)                  \
  45         ctf_array_encoded(_type, _item, _src, _length, none)
  46
  47 #undef ctf_array_text
  48 #define ctf_array_text(_type, _item, _src, _length)             \
  49         ctf_array_encoded(_type, _item, _src, _length, UTF8)
  50
  51 #undef ctf_sequence
  52 #define ctf_sequence(_type, _item, _src, _length_type, _src_length)     \
  53         ctf_sequence_encoded(_type, _item, _src,                        \
  54                         _length_type, _src_length, none)
  55
  56 #undef ctf_sequence_text
  57 #define ctf_sequence_text(_type, _item, _src, _length_type, _src_length) \
  58         ctf_sequence_encoded(_type, _item, _src,                         \
  59                         _length_type, _src_length, UTF8)
  60
  61 /* ctf_string is redefined at each step */
  62
  63 /*
  64  * TRACEPOINT_EVENT_CLASS declares a class of tracepoints receiving the
  65  * same arguments and having the same field layout.
  66  *
  67  * TRACEPOINT_EVENT_INSTANCE declares an instance of a tracepoint, with
  68  * its own provider and name. It refers to a class (template).
  69  *
  70  * TRACEPOINT_EVENT declared both a class and an instance and does a
  71  * direct mapping from the instance to the class.
  72  */
  73
  74 #undef TRACEPOINT_EVENT
  75 #define TRACEPOINT_EVENT(_provider, _name, _args, _fields)      \
  76         TRACEPOINT_EVENT_CLASS(_provider, _name,                \
  77                          _TP_PARAMS(_args),                     \
  78                          _TP_PARAMS(_fields))                   \
  79         TRACEPOINT_EVENT_INSTANCE(_provider, _name, _name,      \
  80                          _TP_PARAMS(_args))
  81
  82 /* Helpers */
  83 #define _TP_ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
  84
  85 #define _tp_max_t(type, x, y)                           \
  86         ({                                              \
  87                 type __max1 = (x);                      \
  88                 type __max2 = (y);                      \
  89                 __max1 > __max2 ? __max1: __max2;       \
  90         })
  91
  92 /*
  93  * Stage 0 of tracepoint event generation.
  94  *
  95  * Check that each TRACEPOINT_EVENT provider argument match the
  96  * TRACEPOINT_PROVIDER by creating dummy callbacks.
  97  */
  98
  99 /* Reset all macros within TRACEPOINT_EVENT */
 100 #include <lttng/ust-tracepoint-event-reset.h>
 101
 102 static inline
 103 void _TP_COMBINE_TOKENS(__tracepoint_provider_mismatch_, TRACEPOINT_PROVIDER)(void)
 104 {
 105 }
 106
 107 #undef TRACEPOINT_EVENT_CLASS
 108 #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields)        \
 109         __tracepoint_provider_mismatch_##_provider();
 110
 111 #undef TRACEPOINT_EVENT_INSTANCE
 112 #define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args)   \
 113         __tracepoint_provider_mismatch_##_provider();
 114
 115 static __attribute__((unused))
 116 void _TP_COMBINE_TOKENS(__tracepoint_provider_check_, TRACEPOINT_PROVIDER)(void)
 117 {
 118 #include TRACEPOINT_INCLUDE
 119 }
 120
 121 /*
 122  * Stage 0.1 of tracepoint event generation.
 123  *
 124  * Check that each TRACEPOINT_EVENT provider:name does not exceed the
 125  * tracepoint name length limit.
 126  */
 127
 128 /* Reset all macros within TRACEPOINT_EVENT */
 129 #include <lttng/ust-tracepoint-event-reset.h>
 130
 131 #undef TRACEPOINT_EVENT_INSTANCE
 132 #define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args)   \
 133 static const char                                                       \
 134         __tp_name_len_check##_provider##___##_name[LTTNG_UST_SYM_NAME_LEN] \
 135         __attribute__((unused)) =                                       \
 136                 #_provider ":" #_name;
 137
 138 #include TRACEPOINT_INCLUDE
 139
 140 /*
 141  * Stage 1 of tracepoint event generation.
 142  *
 143  * Create event field type metadata section.
 144  * Each event produce an array of fields.
 145  */
 146
 147 /* Reset all macros within TRACEPOINT_EVENT */
 148 #include <lttng/ust-tracepoint-event-reset.h>
 149
 150 #undef ctf_integer_ext
 151 #define ctf_integer_ext(_type, _item, _src, _byte_order, _base) \
 152         {                                                       \
 153           .name = #_item,                                       \
 154           .type = __type_integer(_type, _byte_order, _base, none),\
 155         },
 156
 157 #undef ctf_float
 158 #define ctf_float(_type, _item, _src)                           \
 159         {                                                       \
 160           .name = #_item,                                       \
 161           .type = __type_float(_type),                          \
 162         },
 163
 164 #undef ctf_array_encoded
 165 #define ctf_array_encoded(_type, _item, _src, _length, _encoding) \
 166         {                                                       \
 167           .name = #_item,                                       \
 168           .type =                                               \
 169                 {                                               \
 170                   .atype = atype_array,                         \
 171                   .u.array =                                    \
 172                         {                                       \
 173                             .length = _length,                  \
 174                             .elem_type = __type_integer(_type, BYTE_ORDER, 10, _encoding), \
 175                         },                                      \
 176                 },                                              \
 177         },
 178
 179 #undef ctf_sequence_encoded
 180 #define ctf_sequence_encoded(_type, _item, _src,        \
 181                         _length_type, _src_length, _encoding)   \
 182         {                                                       \
 183           .name = #_item,                                       \
 184           .type =                                               \
 185                 {                                               \
 186                   .atype = atype_sequence,                      \
 187                   .u.sequence =                                 \
 188                         {                                       \
 189                             .length_type = __type_integer(_length_type, BYTE_ORDER, 10, none), \
 190                             .elem_type = __type_integer(_type, BYTE_ORDER, 10, _encoding), \
 191                         },                                      \
 192                 },                                              \
 193         },
 194
 195 #undef ctf_string
 196 #define ctf_string(_item, _src)                                 \
 197         {                                                       \
 198           .name = #_item,                                       \
 199           .type =                                               \
 200                 {                                               \
 201                   .atype = atype_string,                        \
 202                   .u.basic.string.encoding = lttng_encode_UTF8, \
 203                 },                                              \
 204         },
 205
 206 #undef TP_FIELDS
 207 #define TP_FIELDS(...) __VA_ARGS__      /* Only one used in this phase */
 208
 209 #undef TRACEPOINT_EVENT_CLASS
 210 #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields)                             \
 211         static const struct lttng_event_field __event_fields___##_provider##___##_name[] = { \
 212                 _fields                                                                      \
 213         };
 214
 215 #include TRACEPOINT_INCLUDE
 216
 217 /*
 218  * Stage 2 of tracepoint event generation.
 219  *
 220  * Create probe callback prototypes.
 221  */
 222
 223 /* Reset all macros within TRACEPOINT_EVENT */
 224 #include <lttng/ust-tracepoint-event-reset.h>
 225
 226 #undef TP_ARGS
 227 #define TP_ARGS(...) __VA_ARGS__
 228
 229 #undef TRACEPOINT_EVENT_CLASS
 230 #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields)                \
 231 static void __event_probe__##_provider##___##_name(_TP_ARGS_DATA_PROTO(_args));
 232
 233 #include TRACEPOINT_INCLUDE
 234
 235 /*
 236  * Stage 3 of tracepoint event generation.
 237  *
 238  * Create static inline function that calculates event size.
 239  */
 240
 241 /* Reset all macros within TRACEPOINT_EVENT */
 242 #include <lttng/ust-tracepoint-event-reset.h>
 243
 244 #undef ctf_integer_ext
 245 #define ctf_integer_ext(_type, _item, _src, _byte_order, _base)                \
 246         __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \
 247         __event_len += sizeof(_type);
 248
 249 #undef ctf_float
 250 #define ctf_float(_type, _item, _src)                                          \
 251         __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \
 252         __event_len += sizeof(_type);
 253
 254 #undef ctf_array_encoded
 255 #define ctf_array_encoded(_type, _item, _src, _length, _encoding)              \
 256         __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \
 257         __event_len += sizeof(_type) * (_length);
 258
 259 #undef ctf_sequence_encoded
 260 #define ctf_sequence_encoded(_type, _item, _src, _length_type,  \
 261                         _src_length, _encoding)                 \
 262         __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_length_type));   \
 263         __event_len += sizeof(_length_type);                                   \
 264         __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \
 265         __dynamic_len[__dynamic_len_idx] = (_src_length);                      \
 266         __event_len += sizeof(_type) * __dynamic_len[__dynamic_len_idx];       \
 267         __dynamic_len_idx++;
 268
 269 #undef ctf_string
 270 #define ctf_string(_item, _src)                                                \
 271         __event_len += __dynamic_len[__dynamic_len_idx++] = strlen(_src) + 1;
 272
 273 #undef TP_ARGS
 274 #define TP_ARGS(...) __VA_ARGS__
 275
 276 #undef TP_FIELDS
 277 #define TP_FIELDS(...) __VA_ARGS__
 278
 279 #undef TRACEPOINT_EVENT_CLASS
 280 #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields)      \
 281 static inline size_t __event_get_size__##_provider##___##_name(size_t *__dynamic_len, _TP_ARGS_DATA_PROTO(_args)) \
 282 {                                                                             \
 283         size_t __event_len = 0;                                               \
 284         unsigned int __dynamic_len_idx = 0;                                   \
 285                                                                               \
 286         if (0)                                                                \
 287                 (void) __dynamic_len_idx;       /* don't warn if unused */    \
 288         _fields                                                               \
 289         return __event_len;                                                   \
 290 }
 291
 292 #include TRACEPOINT_INCLUDE
 293
 294 /*
 295  * Stage 4 of tracepoint event generation.
 296  *
 297  * Create static inline function that calculates event payload alignment.
 298  */
 299
 300 /* Reset all macros within TRACEPOINT_EVENT */
 301 #include <lttng/ust-tracepoint-event-reset.h>
 302
 303 #undef ctf_integer_ext
 304 #define ctf_integer_ext(_type, _item, _src, _byte_order, _base)                \
 305         __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type));
 306
 307 #undef ctf_float
 308 #define ctf_float(_type, _item, _src)                                          \
 309         __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type));
 310
 311 #undef ctf_array_encoded
 312 #define ctf_array_encoded(_type, _item, _src, _length, _encoding)              \
 313         __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type));
 314
 315 #undef ctf_sequence_encoded
 316 #define ctf_sequence_encoded(_type, _item, _src, _length_type,  \
 317                         _src_length, _encoding)                 \
 318         __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_length_type));    \
 319         __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type));
 320
 321 #undef ctf_string
 322 #define ctf_string(_item, _src)
 323
 324 #undef TP_ARGS
 325 #define TP_ARGS(...) __VA_ARGS__
 326
 327 #undef TP_FIELDS
 328 #define TP_FIELDS(...) __VA_ARGS__
 329
 330 #undef TRACEPOINT_EVENT_CLASS
 331 #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields)              \
 332 static inline                                                                 \
 333 size_t __event_get_align__##_provider##___##_name(_TP_ARGS_PROTO(_args))      \
 334 {                                                                             \
 335         size_t __event_align = 1;                                             \
 336         _fields                                                               \
 337         return __event_align;                                                 \
 338 }
 339
 340 #include TRACEPOINT_INCLUDE
 341
 342
 343 /*
 344  * Stage 5 of tracepoint event generation.
 345  *
 346  * Create the probe function. This function calls event size calculation
 347  * and writes event data into the buffer.
 348  */
 349
 350 /* Reset all macros within TRACEPOINT_EVENT */
 351 #include <lttng/ust-tracepoint-event-reset.h>
 352
 353 #undef ctf_integer_ext
 354 #define ctf_integer_ext(_type, _item, _src, _byte_order, _base)         \
 355         {                                                               \
 356                 _type __tmp = (_src);                                   \
 357                 lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__tmp));\
 358                 __chan->ops->event_write(&__ctx, &__tmp, sizeof(__tmp));\
 359         }
 360
 361 #undef ctf_float
 362 #define ctf_float(_type, _item, _src)                                   \
 363         {                                                               \
 364                 _type __tmp = (_src);                                   \
 365                 lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__tmp));\
 366                 __chan->ops->event_write(&__ctx, &__tmp, sizeof(__tmp));\
 367         }
 368
 369 #undef ctf_array_encoded
 370 #define ctf_array_encoded(_type, _item, _src, _length, _encoding)       \
 371         lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type));        \
 372         __chan->ops->event_write(&__ctx, _src, sizeof(_type) * (_length));
 373
 374 #undef ctf_sequence_encoded
 375 #define ctf_sequence_encoded(_type, _item, _src, _length_type,          \
 376                         _src_length, _encoding)                 \
 377         {                                                               \
 378                 _length_type __tmpl = __dynamic_len[__dynamic_len_idx]; \
 379                 lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_length_type));\
 380                 __chan->ops->event_write(&__ctx, &__tmpl, sizeof(_length_type));\
 381         }                                                               \
 382         lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type));        \
 383         __chan->ops->event_write(&__ctx, _src,                          \
 384                 sizeof(_type) * __get_dynamic_len(dest));
 385
 386 #undef ctf_string
 387 #define ctf_string(_item, _src)                                         \
 388         lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(*(_src)));      \
 389         __chan->ops->event_write(&__ctx, _src, __get_dynamic_len(dest));
 390
 391 /* Beware: this get len actually consumes the len value */
 392 #undef __get_dynamic_len
 393 #define __get_dynamic_len(field)        __dynamic_len[__dynamic_len_idx++]
 394
 395 #undef TP_ARGS
 396 #define TP_ARGS(...) __VA_ARGS__
 397
 398 #undef TP_FIELDS
 399 #define TP_FIELDS(...) __VA_ARGS__
 400
 401 #undef TRACEPOINT_EVENT_CLASS
 402 #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields)              \
 403 static void __event_probe__##_provider##___##_name(_TP_ARGS_DATA_PROTO(_args))\
 404 {                                                                             \
 405         struct ltt_event *__event = __tp_data;                                \
 406         struct ltt_channel *__chan = __event->chan;                           \
 407         struct lttng_ust_lib_ring_buffer_ctx __ctx;                           \
 408         size_t __event_len, __event_align;                                    \
 409         size_t __dynamic_len_idx = 0;                                         \
 410         size_t __dynamic_len[_TP_ARRAY_SIZE(__event_fields___##_provider##___##_name)];       \
 411         int __ret;                                                            \
 412                                                                               \
 413         if (0)                                                                \
 414                 (void) __dynamic_len_idx;       /* don't warn if unused */    \
 415         if (caa_unlikely(!CMM_ACCESS_ONCE(__chan->session->active)))          \
 416                 return;                                                       \
 417         if (caa_unlikely(!CMM_ACCESS_ONCE(__chan->enabled)))                  \
 418                 return;                                                       \
 419         if (caa_unlikely(!CMM_ACCESS_ONCE(__event->enabled)))                 \
 420                 return;                                                       \
 421         __event_len = __event_get_size__##_provider##___##_name(__dynamic_len,\
 422                  _TP_ARGS_DATA_VAR(_args));                                   \
 423         __event_align = __event_get_align__##_provider##___##_name(_TP_ARGS_VAR(_args)); \
 424         lib_ring_buffer_ctx_init(&__ctx, __chan->chan, __event, __event_len,  \
 425                                  __event_align, -1, __chan->handle);          \
 426         __ret = __chan->ops->event_reserve(&__ctx, __event->id);              \
 427         if (__ret < 0)                                                        \
 428                 return;                                                       \
 429         _fields                                                               \
 430         __chan->ops->event_commit(&__ctx);                                    \
 431 }
 432
 433 #include TRACEPOINT_INCLUDE
 434
 435 #undef __get_dynamic_len
 436
 437 /*
 438  * Stage 5.1 of tracepoint event generation.
 439  *
 440  * Create probe signature
 441  */
 442
 443 /* Reset all macros within TRACEPOINT_EVENT */
 444 #include <lttng/ust-tracepoint-event-reset.h>
 445
 446 #undef TP_ARGS
 447 #define TP_ARGS(...) __VA_ARGS__
 448
 449 #define _TP_EXTRACT_STRING2(...)        #__VA_ARGS__
 450
 451 #undef TRACEPOINT_EVENT_CLASS
 452 #define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields)        \
 453 const char __tp_event_signature___##_provider##___##_name[] =           \
 454                 _TP_EXTRACT_STRING2(_args);
 455
 456 #include TRACEPOINT_INCLUDE
 457
 458 #undef _TP_EXTRACT_STRING2
 459
 460 /*
 461  * Stage 6 of tracepoint event generation.
 462  *
 463  * Tracepoint loglevel mapping definition generation. We generate a
 464  * symbol for each mapping for a provider/event to ensure at most a 1 to
 465  * 1 mapping between events and loglevels. If the symbol is repeated,
 466  * the compiler will complain.
 467  */
 468
 469 /* Reset all macros within TRACEPOINT_EVENT */
 470 #include <lttng/ust-tracepoint-event-reset.h>
 471
 472 #undef TRACEPOINT_LOGLEVEL
 473 #define TRACEPOINT_LOGLEVEL(__provider, __name, __loglevel)                \
 474 static const int _loglevel_value___##__provider##___##__name = __loglevel; \
 475 static const int *_loglevel___##__provider##___##__name =                  \
 476                 &_loglevel_value___##__provider##___##__name;
 477
 478 #include TRACEPOINT_INCLUDE
 479
 480 /*
 481  * Stage 7.1 of tracepoint event generation.
 482  *
 483  * Create events description structures. We use a weakref because
 484  * loglevels are optional. If not declared, the event will point to the
 485  * a loglevel that contains NULL.
 486  */
 487
 488 /* Reset all macros within TRACEPOINT_EVENT */
 489 #include <lttng/ust-tracepoint-event-reset.h>
 490
 491 #undef TRACEPOINT_EVENT_INSTANCE
 492 #define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args)          \
 493 static const int *                                                             \
 494         __ref_loglevel___##_provider##___##_name                               \
 495         __attribute__((weakref ("_loglevel___" #_provider "___" #_name)));     \
 496 const struct lttng_event_desc __event_desc___##_provider##_##_name = {         \
 497         .fields = __event_fields___##_provider##___##_template,                \
 498         .name = #_provider ":" #_name,                                         \
 499         .probe_callback = (void (*)(void)) &__event_probe__##_provider##___##_template,\
 500         .nr_fields = _TP_ARRAY_SIZE(__event_fields___##_provider##___##_template), \
 501         .loglevel = &__ref_loglevel___##_provider##___##_name,                 \
 502         .signature = __tp_event_signature___##_provider##___##_template,       \
 503 };
 504
 505 #include TRACEPOINT_INCLUDE
 506
 507 /*
 508  * Stage 7.2 of tracepoint event generation.
 509  *
 510  * Create array of events.
 511  */
 512
 513 /* Reset all macros within TRACEPOINT_EVENT */
 514 #include <lttng/ust-tracepoint-event-reset.h>
 515
 516 #undef TRACEPOINT_EVENT_INSTANCE
 517 #define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args)          \
 518         &__event_desc___##_provider##_##_name,
 519
 520 static const struct lttng_event_desc *_TP_COMBINE_TOKENS(__event_desc___, TRACEPOINT_PROVIDER)[] = {
 521 #include TRACEPOINT_INCLUDE
 522 };
 523
 524
 525 /*
 526  * Stage 8 of tracepoint event generation.
 527  *
 528  * Create a toplevel descriptor for the whole probe.
 529  */
 530
 531 /* non-const because list head will be modified when registered. */
 532 static struct lttng_probe_desc _TP_COMBINE_TOKENS(__probe_desc___, TRACEPOINT_PROVIDER) = {
 533         .provider = __tp_stringify(TRACEPOINT_PROVIDER),
 534         .event_desc = _TP_COMBINE_TOKENS(__event_desc___, TRACEPOINT_PROVIDER),
 535         .nr_events = _TP_ARRAY_SIZE(_TP_COMBINE_TOKENS(__event_desc___, TRACEPOINT_PROVIDER)),
 536 };
 537
 538 /*
 539  * Stage 9 of tracepoint event generation.
 540  *
 541  * Register/unregister probes at module load/unload.
 542  *
 543  * Generate the constructor as an externally visible symbol for use when
 544  * linking the probe statically.
 545  */
 546
 547 /* Reset all macros within TRACEPOINT_EVENT */
 548 #include <lttng/ust-tracepoint-event-reset.h>
 549 static void __attribute__((constructor))
 550 _TP_COMBINE_TOKENS(__lttng_events_init__, TRACEPOINT_PROVIDER)(void)
 551 {
 552         int ret;
 553
 554         ret = ltt_probe_register(&_TP_COMBINE_TOKENS(__probe_desc___, TRACEPOINT_PROVIDER));
 555         assert(!ret);
 556 }
 557
 558 static void __attribute__((destructor))
 559 _TP_COMBINE_TOKENS(__lttng_events_exit__, TRACEPOINT_PROVIDER)(void)
 560 {
 561         ltt_probe_unregister(&_TP_COMBINE_TOKENS(__probe_desc___, TRACEPOINT_PROVIDER));
 562 }
 563
 564 int _TP_COMBINE_TOKENS(__tracepoint_provider_, TRACEPOINT_PROVIDER);