| 1 | /* |
| 2 | * lttng-events.h |
| 3 | * |
| 4 | * Copyright (C) 2009 Steven Rostedt <rostedt@goodmis.org> |
| 5 | * Copyright (C) 2009-2014 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 6 | * |
| 7 | * This library is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU Lesser General Public |
| 9 | * License as published by the Free Software Foundation; only |
| 10 | * version 2.1 of the License. |
| 11 | * |
| 12 | * This library is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | * Lesser General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU Lesser General Public |
| 18 | * License along with this library; if not, write to the Free Software |
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 20 | */ |
| 21 | |
| 22 | #include <linux/uaccess.h> |
| 23 | #include <linux/debugfs.h> |
| 24 | #include <linux/rculist.h> |
| 25 | #include "lttng.h" |
| 26 | #include "lttng-types.h" |
| 27 | #include "lttng-probe-user.h" |
| 28 | #include "../wrapper/vmalloc.h" /* for wrapper_vmalloc_sync_all() */ |
| 29 | #include "../wrapper/ringbuffer/frontend_types.h" |
| 30 | #include "../wrapper/ringbuffer/backend.h" |
| 31 | #include "../wrapper/rcu.h" |
| 32 | #include "../lttng-events.h" |
| 33 | #include "../lttng-tracer-core.h" |
| 34 | |
| 35 | /* |
| 36 | * Macro declarations used for all stages. |
| 37 | */ |
| 38 | |
| 39 | /* |
| 40 | * LTTng name mapping macros. LTTng remaps some of the kernel events to |
| 41 | * enforce name-spacing. |
| 42 | */ |
| 43 | #undef LTTNG_TRACEPOINT_EVENT_MAP |
| 44 | #define LTTNG_TRACEPOINT_EVENT_MAP(name, map, proto, args, fields) \ |
| 45 | LTTNG_TRACEPOINT_EVENT_CLASS(map, \ |
| 46 | PARAMS(proto), \ |
| 47 | PARAMS(args), \ |
| 48 | PARAMS(fields)) \ |
| 49 | LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(map, name, map, PARAMS(proto), PARAMS(args)) |
| 50 | |
| 51 | #undef LTTNG_TRACEPOINT_EVENT_MAP_NOARGS |
| 52 | #define LTTNG_TRACEPOINT_EVENT_MAP_NOARGS(name, map, fields) \ |
| 53 | LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(map, \ |
| 54 | PARAMS(fields)) \ |
| 55 | LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(map, name, map) |
| 56 | |
| 57 | #undef LTTNG_TRACEPOINT_EVENT_CODE_MAP |
| 58 | #define LTTNG_TRACEPOINT_EVENT_CODE_MAP(name, map, proto, args, _locvar, _code, fields) \ |
| 59 | LTTNG_TRACEPOINT_EVENT_CLASS_CODE(map, \ |
| 60 | PARAMS(proto), \ |
| 61 | PARAMS(args), \ |
| 62 | PARAMS(_locvar), \ |
| 63 | PARAMS(_code), \ |
| 64 | PARAMS(fields)) \ |
| 65 | LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(map, name, map, PARAMS(proto), PARAMS(args)) |
| 66 | |
| 67 | #undef LTTNG_TRACEPOINT_EVENT_CODE |
| 68 | #define LTTNG_TRACEPOINT_EVENT_CODE(name, proto, args, _locvar, _code, fields) \ |
| 69 | LTTNG_TRACEPOINT_EVENT_CODE_MAP(name, name, \ |
| 70 | PARAMS(proto), \ |
| 71 | PARAMS(args), \ |
| 72 | PARAMS(_locvar), \ |
| 73 | PARAMS(_code), \ |
| 74 | PARAMS(fields)) |
| 75 | |
| 76 | /* |
| 77 | * LTTNG_TRACEPOINT_EVENT_CLASS can be used to add a generic function |
| 78 | * handlers for events. That is, if all events have the same parameters |
| 79 | * and just have distinct trace points. Each tracepoint can be defined |
| 80 | * with LTTNG_TRACEPOINT_EVENT_INSTANCE and that will map the |
| 81 | * LTTNG_TRACEPOINT_EVENT_CLASS to the tracepoint. |
| 82 | * |
| 83 | * LTTNG_TRACEPOINT_EVENT is a one to one mapping between tracepoint and |
| 84 | * template. |
| 85 | */ |
| 86 | |
| 87 | #undef LTTNG_TRACEPOINT_EVENT |
| 88 | #define LTTNG_TRACEPOINT_EVENT(name, proto, args, fields) \ |
| 89 | LTTNG_TRACEPOINT_EVENT_MAP(name, name, \ |
| 90 | PARAMS(proto), \ |
| 91 | PARAMS(args), \ |
| 92 | PARAMS(fields)) |
| 93 | |
| 94 | #undef LTTNG_TRACEPOINT_EVENT_NOARGS |
| 95 | #define LTTNG_TRACEPOINT_EVENT_NOARGS(name, fields) \ |
| 96 | LTTNG_TRACEPOINT_EVENT_MAP_NOARGS(name, name, PARAMS(fields)) |
| 97 | |
| 98 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE |
| 99 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE(template, name, proto, args) \ |
| 100 | LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(template, name, name, PARAMS(proto), PARAMS(args)) |
| 101 | |
| 102 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS |
| 103 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS(template, name) \ |
| 104 | LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(template, name, name) |
| 105 | |
| 106 | #undef LTTNG_TRACEPOINT_EVENT_CLASS |
| 107 | #define LTTNG_TRACEPOINT_EVENT_CLASS(_name, _proto, _args, _fields) \ |
| 108 | LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, PARAMS(_proto), PARAMS(_args), , , \ |
| 109 | PARAMS(_fields)) |
| 110 | |
| 111 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS |
| 112 | #define LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(_name, _fields) \ |
| 113 | LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, , , PARAMS(_fields)) |
| 114 | |
| 115 | |
| 116 | /* |
| 117 | * Stage 1 of the trace events. |
| 118 | * |
| 119 | * Create dummy trace calls for each events, verifying that the LTTng module |
| 120 | * instrumentation headers match the kernel arguments. Will be optimized |
| 121 | * out by the compiler. |
| 122 | */ |
| 123 | |
| 124 | /* Reset all macros within TRACEPOINT_EVENT */ |
| 125 | #include "lttng-events-reset.h" |
| 126 | |
| 127 | #undef TP_PROTO |
| 128 | #define TP_PROTO(...) __VA_ARGS__ |
| 129 | |
| 130 | #undef TP_ARGS |
| 131 | #define TP_ARGS(...) __VA_ARGS__ |
| 132 | |
| 133 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP |
| 134 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(_template, _name, _map, _proto, _args) \ |
| 135 | void trace_##_name(_proto); |
| 136 | |
| 137 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS |
| 138 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map) \ |
| 139 | void trace_##_name(void); |
| 140 | |
| 141 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| 142 | |
| 143 | /* |
| 144 | * Stage 1.1 of the trace events. |
| 145 | * |
| 146 | * Create dummy trace prototypes for each event class, and for each used |
| 147 | * template. This will allow checking whether the prototypes from the |
| 148 | * class and the instance using the class actually match. |
| 149 | */ |
| 150 | |
| 151 | #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */ |
| 152 | |
| 153 | #undef TP_PROTO |
| 154 | #define TP_PROTO(...) __VA_ARGS__ |
| 155 | |
| 156 | #undef TP_ARGS |
| 157 | #define TP_ARGS(...) __VA_ARGS__ |
| 158 | |
| 159 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP |
| 160 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(_template, _name, _map, _proto, _args) \ |
| 161 | void __event_template_proto___##_template(_proto); |
| 162 | |
| 163 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS |
| 164 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map) \ |
| 165 | void __event_template_proto___##_template(void); |
| 166 | |
| 167 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE |
| 168 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code, _fields) \ |
| 169 | void __event_template_proto___##_name(_proto); |
| 170 | |
| 171 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS |
| 172 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code, _fields) \ |
| 173 | void __event_template_proto___##_name(void); |
| 174 | |
| 175 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| 176 | |
| 177 | /* |
| 178 | * Stage 2 of the trace events. |
| 179 | * |
| 180 | * Create event field type metadata section. |
| 181 | * Each event produce an array of fields. |
| 182 | */ |
| 183 | |
| 184 | /* Reset all macros within TRACEPOINT_EVENT */ |
| 185 | #include "lttng-events-reset.h" |
| 186 | #include "lttng-events-write.h" |
| 187 | #include "lttng-events-nowrite.h" |
| 188 | |
| 189 | #undef _ctf_integer_ext |
| 190 | #define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _user, _nowrite) \ |
| 191 | { \ |
| 192 | .name = #_item, \ |
| 193 | .type = __type_integer(_type, _byte_order, _base, none),\ |
| 194 | .nowrite = _nowrite, \ |
| 195 | .user = _user, \ |
| 196 | }, |
| 197 | |
| 198 | #undef _ctf_array_encoded |
| 199 | #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _user, _nowrite) \ |
| 200 | { \ |
| 201 | .name = #_item, \ |
| 202 | .type = \ |
| 203 | { \ |
| 204 | .atype = atype_array, \ |
| 205 | .u = \ |
| 206 | { \ |
| 207 | .array = \ |
| 208 | { \ |
| 209 | .elem_type = __type_integer(_type, __BYTE_ORDER, 10, _encoding), \ |
| 210 | .length = _length, \ |
| 211 | } \ |
| 212 | } \ |
| 213 | }, \ |
| 214 | .nowrite = _nowrite, \ |
| 215 | .user = _user, \ |
| 216 | }, |
| 217 | |
| 218 | #undef _ctf_sequence_encoded |
| 219 | #define _ctf_sequence_encoded(_type, _item, _src, \ |
| 220 | _length_type, _src_length, _encoding, \ |
| 221 | _byte_order, _base, _user, _nowrite) \ |
| 222 | { \ |
| 223 | .name = #_item, \ |
| 224 | .type = \ |
| 225 | { \ |
| 226 | .atype = atype_sequence, \ |
| 227 | .u = \ |
| 228 | { \ |
| 229 | .sequence = \ |
| 230 | { \ |
| 231 | .length_type = __type_integer(_length_type, __BYTE_ORDER, 10, none), \ |
| 232 | .elem_type = __type_integer(_type, _byte_order, _base, _encoding), \ |
| 233 | }, \ |
| 234 | }, \ |
| 235 | }, \ |
| 236 | .nowrite = _nowrite, \ |
| 237 | .user = _user, \ |
| 238 | }, |
| 239 | |
| 240 | #undef _ctf_string |
| 241 | #define _ctf_string(_item, _src, _user, _nowrite) \ |
| 242 | { \ |
| 243 | .name = #_item, \ |
| 244 | .type = \ |
| 245 | { \ |
| 246 | .atype = atype_string, \ |
| 247 | .u = \ |
| 248 | { \ |
| 249 | .basic = { .string = { .encoding = lttng_encode_UTF8 } } \ |
| 250 | }, \ |
| 251 | }, \ |
| 252 | .nowrite = _nowrite, \ |
| 253 | .user = _user, \ |
| 254 | }, |
| 255 | |
| 256 | #undef TP_FIELDS |
| 257 | #define TP_FIELDS(...) __VA_ARGS__ /* Only one used in this phase */ |
| 258 | |
| 259 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS |
| 260 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code, _fields) \ |
| 261 | static const struct lttng_event_field __event_fields___##_name[] = { \ |
| 262 | _fields \ |
| 263 | }; |
| 264 | |
| 265 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE |
| 266 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code, _fields) \ |
| 267 | LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code, PARAMS(_fields)) |
| 268 | |
| 269 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| 270 | |
| 271 | /* |
| 272 | * Stage 3 of the trace events. |
| 273 | * |
| 274 | * Create probe callback prototypes. |
| 275 | */ |
| 276 | |
| 277 | /* Reset all macros within TRACEPOINT_EVENT */ |
| 278 | #include "lttng-events-reset.h" |
| 279 | |
| 280 | #undef TP_PROTO |
| 281 | #define TP_PROTO(...) __VA_ARGS__ |
| 282 | |
| 283 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE |
| 284 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code, _fields) \ |
| 285 | static void __event_probe__##_name(void *__data, _proto); |
| 286 | |
| 287 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS |
| 288 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code, _fields) \ |
| 289 | static void __event_probe__##_name(void *__data); |
| 290 | |
| 291 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| 292 | |
| 293 | /* |
| 294 | * Stage 4 of the trace events. |
| 295 | * |
| 296 | * Create static inline function that calculates event size. |
| 297 | */ |
| 298 | |
| 299 | /* Reset all macros within TRACEPOINT_EVENT */ |
| 300 | #include "lttng-events-reset.h" |
| 301 | #include "lttng-events-write.h" |
| 302 | |
| 303 | #undef _ctf_integer_ext |
| 304 | #define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _user, _nowrite) \ |
| 305 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ |
| 306 | __event_len += sizeof(_type); |
| 307 | |
| 308 | #undef _ctf_array_encoded |
| 309 | #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _user, _nowrite) \ |
| 310 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ |
| 311 | __event_len += sizeof(_type) * (_length); |
| 312 | |
| 313 | #undef _ctf_sequence_encoded |
| 314 | #define _ctf_sequence_encoded(_type, _item, _src, _length_type, \ |
| 315 | _src_length, _encoding, _byte_order, _base, _user, _nowrite) \ |
| 316 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_length_type)); \ |
| 317 | __event_len += sizeof(_length_type); \ |
| 318 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ |
| 319 | __dynamic_len[__dynamic_len_idx] = (_src_length); \ |
| 320 | __event_len += sizeof(_type) * __dynamic_len[__dynamic_len_idx]; \ |
| 321 | __dynamic_len_idx++; |
| 322 | |
| 323 | /* |
| 324 | * ctf_user_string includes \0. If returns 0, it faulted, so we set size to |
| 325 | * 1 (\0 only). |
| 326 | */ |
| 327 | #undef _ctf_string |
| 328 | #define _ctf_string(_item, _src, _user, _nowrite) \ |
| 329 | if (_user) \ |
| 330 | __event_len += __dynamic_len[__dynamic_len_idx++] = \ |
| 331 | max_t(size_t, lttng_strlen_user_inatomic(_src), 1); \ |
| 332 | else \ |
| 333 | __event_len += __dynamic_len[__dynamic_len_idx++] = \ |
| 334 | strlen(_src) + 1; |
| 335 | |
| 336 | #undef TP_PROTO |
| 337 | #define TP_PROTO(...) __VA_ARGS__ |
| 338 | |
| 339 | #undef TP_FIELDS |
| 340 | #define TP_FIELDS(...) __VA_ARGS__ |
| 341 | |
| 342 | #undef TP_locvar |
| 343 | #define TP_locvar(...) __VA_ARGS__ |
| 344 | |
| 345 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE |
| 346 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code, _fields) \ |
| 347 | static inline size_t __event_get_size__##_name(size_t *__dynamic_len, \ |
| 348 | void *__tp_locvar, _proto) \ |
| 349 | { \ |
| 350 | size_t __event_len = 0; \ |
| 351 | unsigned int __dynamic_len_idx __attribute__((unused)) = 0; \ |
| 352 | struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \ |
| 353 | \ |
| 354 | _fields \ |
| 355 | return __event_len; \ |
| 356 | } |
| 357 | |
| 358 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS |
| 359 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code, _fields) \ |
| 360 | static inline size_t __event_get_size__##_name(size_t *__dynamic_len, \ |
| 361 | void *__tp_locvar) \ |
| 362 | { \ |
| 363 | size_t __event_len = 0; \ |
| 364 | unsigned int __dynamic_len_idx __attribute__((unused)) = 0; \ |
| 365 | struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \ |
| 366 | \ |
| 367 | _fields \ |
| 368 | return __event_len; \ |
| 369 | } |
| 370 | |
| 371 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| 372 | |
| 373 | |
| 374 | /* |
| 375 | * Stage 4.1 of tracepoint event generation. |
| 376 | * |
| 377 | * Create static inline function that layout the filter stack data. |
| 378 | * We make both write and nowrite data available to the filter. |
| 379 | */ |
| 380 | |
| 381 | /* Reset all macros within TRACEPOINT_EVENT */ |
| 382 | #include "lttng-events-reset.h" |
| 383 | #include "lttng-events-write.h" |
| 384 | #include "lttng-events-nowrite.h" |
| 385 | |
| 386 | #undef _ctf_integer_ext_fetched |
| 387 | #define _ctf_integer_ext_fetched(_type, _item, _src, _byte_order, _base, _nowrite) \ |
| 388 | if (lttng_is_signed_type(_type)) { \ |
| 389 | int64_t __ctf_tmp_int64; \ |
| 390 | switch (sizeof(_type)) { \ |
| 391 | case 1: \ |
| 392 | { \ |
| 393 | union { _type t; int8_t v; } __tmp = { (_type) (_src) }; \ |
| 394 | __ctf_tmp_int64 = (int64_t) __tmp.v; \ |
| 395 | break; \ |
| 396 | } \ |
| 397 | case 2: \ |
| 398 | { \ |
| 399 | union { _type t; int16_t v; } __tmp = { (_type) (_src) }; \ |
| 400 | __ctf_tmp_int64 = (int64_t) __tmp.v; \ |
| 401 | break; \ |
| 402 | } \ |
| 403 | case 4: \ |
| 404 | { \ |
| 405 | union { _type t; int32_t v; } __tmp = { (_type) (_src) }; \ |
| 406 | __ctf_tmp_int64 = (int64_t) __tmp.v; \ |
| 407 | break; \ |
| 408 | } \ |
| 409 | case 8: \ |
| 410 | { \ |
| 411 | union { _type t; int64_t v; } __tmp = { (_type) (_src) }; \ |
| 412 | __ctf_tmp_int64 = (int64_t) __tmp.v; \ |
| 413 | break; \ |
| 414 | } \ |
| 415 | default: \ |
| 416 | BUG_ON(1); \ |
| 417 | }; \ |
| 418 | memcpy(__stack_data, &__ctf_tmp_int64, sizeof(int64_t)); \ |
| 419 | } else { \ |
| 420 | uint64_t __ctf_tmp_uint64; \ |
| 421 | switch (sizeof(_type)) { \ |
| 422 | case 1: \ |
| 423 | { \ |
| 424 | union { _type t; uint8_t v; } __tmp = { (_type) (_src) }; \ |
| 425 | __ctf_tmp_uint64 = (uint64_t) __tmp.v; \ |
| 426 | break; \ |
| 427 | } \ |
| 428 | case 2: \ |
| 429 | { \ |
| 430 | union { _type t; uint16_t v; } __tmp = { (_type) (_src) }; \ |
| 431 | __ctf_tmp_uint64 = (uint64_t) __tmp.v; \ |
| 432 | break; \ |
| 433 | } \ |
| 434 | case 4: \ |
| 435 | { \ |
| 436 | union { _type t; uint32_t v; } __tmp = { (_type) (_src) }; \ |
| 437 | __ctf_tmp_uint64 = (uint64_t) __tmp.v; \ |
| 438 | break; \ |
| 439 | } \ |
| 440 | case 8: \ |
| 441 | { \ |
| 442 | union { _type t; uint64_t v; } __tmp = { (_type) (_src) }; \ |
| 443 | __ctf_tmp_uint64 = (uint64_t) __tmp.v; \ |
| 444 | break; \ |
| 445 | } \ |
| 446 | default: \ |
| 447 | BUG_ON(1); \ |
| 448 | }; \ |
| 449 | memcpy(__stack_data, &__ctf_tmp_uint64, sizeof(uint64_t)); \ |
| 450 | } \ |
| 451 | __stack_data += sizeof(int64_t); |
| 452 | |
| 453 | #undef _ctf_integer_ext_isuser0 |
| 454 | #define _ctf_integer_ext_isuser0(_type, _item, _src, _byte_order, _base, _nowrite) \ |
| 455 | _ctf_integer_ext_fetched(_type, _item, _src, _byte_order, _base, _nowrite) |
| 456 | |
| 457 | #undef _ctf_integer_ext_isuser1 |
| 458 | #define _ctf_integer_ext_isuser1(_type, _item, _user_src, _byte_order, _base, _nowrite) \ |
| 459 | { \ |
| 460 | union { \ |
| 461 | char __array[sizeof(_user_src)]; \ |
| 462 | __typeof__(_user_src) __v; \ |
| 463 | } __tmp_fetch; \ |
| 464 | if (lib_ring_buffer_copy_from_user_check_nofault(__tmp_fetch.__array, \ |
| 465 | &(_user_src), sizeof(_user_src))) \ |
| 466 | memset(__tmp_fetch.__array, 0, sizeof(__tmp_fetch.__array)); \ |
| 467 | _ctf_integer_ext_fetched(_type, _item, __tmp_fetch.__v, _byte_order, _base, _nowrite) \ |
| 468 | } |
| 469 | |
| 470 | #undef _ctf_integer_ext |
| 471 | #define _ctf_integer_ext(_type, _item, _user_src, _byte_order, _base, _user, _nowrite) \ |
| 472 | _ctf_integer_ext_isuser##_user(_type, _item, _user_src, _byte_order, _base, _nowrite) |
| 473 | |
| 474 | #undef _ctf_array_encoded |
| 475 | #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _user, _nowrite) \ |
| 476 | { \ |
| 477 | unsigned long __ctf_tmp_ulong = (unsigned long) (_length); \ |
| 478 | const void *__ctf_tmp_ptr = (_src); \ |
| 479 | memcpy(__stack_data, &__ctf_tmp_ulong, sizeof(unsigned long)); \ |
| 480 | __stack_data += sizeof(unsigned long); \ |
| 481 | memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void *)); \ |
| 482 | __stack_data += sizeof(void *); \ |
| 483 | } |
| 484 | |
| 485 | #undef _ctf_sequence_encoded |
| 486 | #define _ctf_sequence_encoded(_type, _item, _src, _length_type, \ |
| 487 | _src_length, _encoding, _byte_order, _base, _user, _nowrite) \ |
| 488 | { \ |
| 489 | unsigned long __ctf_tmp_ulong = (unsigned long) (_src_length); \ |
| 490 | const void *__ctf_tmp_ptr = (_src); \ |
| 491 | memcpy(__stack_data, &__ctf_tmp_ulong, sizeof(unsigned long)); \ |
| 492 | __stack_data += sizeof(unsigned long); \ |
| 493 | memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void *)); \ |
| 494 | __stack_data += sizeof(void *); \ |
| 495 | } |
| 496 | |
| 497 | #undef _ctf_string |
| 498 | #define _ctf_string(_item, _src, _user, _nowrite) \ |
| 499 | { \ |
| 500 | const void *__ctf_tmp_ptr = (_src); \ |
| 501 | memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void *)); \ |
| 502 | __stack_data += sizeof(void *); \ |
| 503 | } |
| 504 | |
| 505 | #undef TP_PROTO |
| 506 | #define TP_PROTO(...) __VA_ARGS__ |
| 507 | |
| 508 | #undef TP_FIELDS |
| 509 | #define TP_FIELDS(...) __VA_ARGS__ |
| 510 | |
| 511 | #undef TP_locvar |
| 512 | #define TP_locvar(...) __VA_ARGS__ |
| 513 | |
| 514 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS |
| 515 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code, _fields) \ |
| 516 | static inline \ |
| 517 | void __event_prepare_filter_stack__##_name(char *__stack_data, \ |
| 518 | void *__tp_locvar) \ |
| 519 | { \ |
| 520 | struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \ |
| 521 | \ |
| 522 | _fields \ |
| 523 | } |
| 524 | |
| 525 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE |
| 526 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code, _fields) \ |
| 527 | static inline \ |
| 528 | void __event_prepare_filter_stack__##_name(char *__stack_data, \ |
| 529 | void *__tp_locvar, _proto) \ |
| 530 | { \ |
| 531 | struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \ |
| 532 | \ |
| 533 | _fields \ |
| 534 | } |
| 535 | |
| 536 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| 537 | |
| 538 | /* |
| 539 | * Stage 5 of the trace events. |
| 540 | * |
| 541 | * Create static inline function that calculates event payload alignment. |
| 542 | */ |
| 543 | |
| 544 | /* Reset all macros within TRACEPOINT_EVENT */ |
| 545 | #include "lttng-events-reset.h" |
| 546 | #include "lttng-events-write.h" |
| 547 | |
| 548 | #undef _ctf_integer_ext |
| 549 | #define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _user, _nowrite) \ |
| 550 | __event_align = max_t(size_t, __event_align, lttng_alignof(_type)); |
| 551 | |
| 552 | #undef _ctf_array_encoded |
| 553 | #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _user, _nowrite) \ |
| 554 | __event_align = max_t(size_t, __event_align, lttng_alignof(_type)); |
| 555 | |
| 556 | #undef _ctf_sequence_encoded |
| 557 | #define _ctf_sequence_encoded(_type, _item, _src, _length_type, \ |
| 558 | _src_length, _encoding, _byte_order, _base, _user, _nowrite) \ |
| 559 | __event_align = max_t(size_t, __event_align, lttng_alignof(_length_type)); \ |
| 560 | __event_align = max_t(size_t, __event_align, lttng_alignof(_type)); |
| 561 | |
| 562 | #undef _ctf_string |
| 563 | #define _ctf_string(_item, _src, _user, _nowrite) |
| 564 | |
| 565 | #undef TP_PROTO |
| 566 | #define TP_PROTO(...) __VA_ARGS__ |
| 567 | |
| 568 | #undef TP_FIELDS |
| 569 | #define TP_FIELDS(...) __VA_ARGS__ |
| 570 | |
| 571 | #undef TP_locvar |
| 572 | #define TP_locvar(...) __VA_ARGS__ |
| 573 | |
| 574 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE |
| 575 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code, _fields) \ |
| 576 | static inline size_t __event_get_align__##_name(void *__tp_locvar, _proto) \ |
| 577 | { \ |
| 578 | size_t __event_align = 1; \ |
| 579 | struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \ |
| 580 | \ |
| 581 | _fields \ |
| 582 | return __event_align; \ |
| 583 | } |
| 584 | |
| 585 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS |
| 586 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code, _fields) \ |
| 587 | static inline size_t __event_get_align__##_name(void *__tp_locvar) \ |
| 588 | { \ |
| 589 | size_t __event_align = 1; \ |
| 590 | struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \ |
| 591 | \ |
| 592 | _fields \ |
| 593 | return __event_align; \ |
| 594 | } |
| 595 | |
| 596 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| 597 | |
| 598 | /* |
| 599 | * Stage 6 of tracepoint event generation. |
| 600 | * |
| 601 | * Create the probe function. This function calls event size calculation |
| 602 | * and writes event data into the buffer. |
| 603 | */ |
| 604 | |
| 605 | /* Reset all macros within TRACEPOINT_EVENT */ |
| 606 | #include "lttng-events-reset.h" |
| 607 | #include "lttng-events-write.h" |
| 608 | |
| 609 | #undef _ctf_integer_ext_fetched |
| 610 | #define _ctf_integer_ext_fetched(_type, _item, _src, _byte_order, _base, _nowrite) \ |
| 611 | { \ |
| 612 | _type __tmp = _src; \ |
| 613 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__tmp));\ |
| 614 | __chan->ops->event_write(&__ctx, &__tmp, sizeof(__tmp));\ |
| 615 | } |
| 616 | |
| 617 | #undef _ctf_integer_ext_isuser0 |
| 618 | #define _ctf_integer_ext_isuser0(_type, _item, _src, _byte_order, _base, _nowrite) \ |
| 619 | _ctf_integer_ext_fetched(_type, _item, _src, _byte_order, _base, _nowrite) |
| 620 | |
| 621 | #undef _ctf_integer_ext_isuser1 |
| 622 | #define _ctf_integer_ext_isuser1(_type, _item, _user_src, _byte_order, _base, _nowrite) \ |
| 623 | { \ |
| 624 | union { \ |
| 625 | char __array[sizeof(_user_src)]; \ |
| 626 | __typeof__(_user_src) __v; \ |
| 627 | } __tmp_fetch; \ |
| 628 | if (lib_ring_buffer_copy_from_user_check_nofault(__tmp_fetch.__array, \ |
| 629 | &(_user_src), sizeof(_user_src))) \ |
| 630 | memset(__tmp_fetch.__array, 0, sizeof(__tmp_fetch.__array)); \ |
| 631 | _ctf_integer_ext_fetched(_type, _item, __tmp_fetch.__v, _byte_order, _base, _nowrite) \ |
| 632 | } |
| 633 | |
| 634 | #undef _ctf_integer_ext |
| 635 | #define _ctf_integer_ext(_type, _item, _user_src, _byte_order, _base, _user, _nowrite) \ |
| 636 | _ctf_integer_ext_isuser##_user(_type, _item, _user_src, _byte_order, _base, _nowrite) |
| 637 | |
| 638 | #undef _ctf_array_encoded |
| 639 | #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _user, _nowrite) \ |
| 640 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \ |
| 641 | if (_user) { \ |
| 642 | __chan->ops->event_write_from_user(&__ctx, _src, sizeof(_type) * (_length)); \ |
| 643 | } else { \ |
| 644 | __chan->ops->event_write(&__ctx, _src, sizeof(_type) * (_length)); \ |
| 645 | } |
| 646 | |
| 647 | #undef _ctf_sequence_encoded |
| 648 | #define _ctf_sequence_encoded(_type, _item, _src, _length_type, \ |
| 649 | _src_length, _encoding, _byte_order, _base, _user, _nowrite) \ |
| 650 | { \ |
| 651 | _length_type __tmpl = __stackvar.__dynamic_len[__dynamic_len_idx]; \ |
| 652 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_length_type));\ |
| 653 | __chan->ops->event_write(&__ctx, &__tmpl, sizeof(_length_type));\ |
| 654 | } \ |
| 655 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \ |
| 656 | if (_user) { \ |
| 657 | __chan->ops->event_write_from_user(&__ctx, _src, \ |
| 658 | sizeof(_type) * __get_dynamic_len(dest)); \ |
| 659 | } else { \ |
| 660 | __chan->ops->event_write(&__ctx, _src, \ |
| 661 | sizeof(_type) * __get_dynamic_len(dest)); \ |
| 662 | } |
| 663 | |
| 664 | #undef _ctf_string |
| 665 | #define _ctf_string(_item, _src, _user, _nowrite) \ |
| 666 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(*(_src))); \ |
| 667 | if (_user) { \ |
| 668 | __chan->ops->event_strcpy_from_user(&__ctx, _src, \ |
| 669 | __get_dynamic_len(dest)); \ |
| 670 | } else { \ |
| 671 | __chan->ops->event_strcpy(&__ctx, _src, \ |
| 672 | __get_dynamic_len(dest)); \ |
| 673 | } |
| 674 | |
| 675 | /* Beware: this get len actually consumes the len value */ |
| 676 | #undef __get_dynamic_len |
| 677 | #define __get_dynamic_len(field) __stackvar.__dynamic_len[__dynamic_len_idx++] |
| 678 | |
| 679 | #undef TP_PROTO |
| 680 | #define TP_PROTO(...) __VA_ARGS__ |
| 681 | |
| 682 | #undef TP_ARGS |
| 683 | #define TP_ARGS(...) __VA_ARGS__ |
| 684 | |
| 685 | #undef TP_FIELDS |
| 686 | #define TP_FIELDS(...) __VA_ARGS__ |
| 687 | |
| 688 | #undef TP_locvar |
| 689 | #define TP_locvar(...) __VA_ARGS__ |
| 690 | |
| 691 | #undef TP_code |
| 692 | #define TP_code(...) __VA_ARGS__ |
| 693 | |
| 694 | /* |
| 695 | * For state dump, check that "session" argument (mandatory) matches the |
| 696 | * session this event belongs to. Ensures that we write state dump data only |
| 697 | * into the started session, not into all sessions. |
| 698 | */ |
| 699 | #ifdef TP_SESSION_CHECK |
| 700 | #define _TP_SESSION_CHECK(session, csession) (session == csession) |
| 701 | #else /* TP_SESSION_CHECK */ |
| 702 | #define _TP_SESSION_CHECK(session, csession) 1 |
| 703 | #endif /* TP_SESSION_CHECK */ |
| 704 | |
| 705 | /* |
| 706 | * Using twice size for filter stack data to hold size and pointer for |
| 707 | * each field (worse case). For integers, max size required is 64-bit. |
| 708 | * Same for double-precision floats. Those fit within |
| 709 | * 2*sizeof(unsigned long) for all supported architectures. |
| 710 | * Perform UNION (||) of filter runtime list. |
| 711 | */ |
| 712 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE |
| 713 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code, _fields) \ |
| 714 | static void __event_probe__##_name(void *__data, _proto) \ |
| 715 | { \ |
| 716 | struct probe_local_vars { _locvar }; \ |
| 717 | struct lttng_event *__event = __data; \ |
| 718 | struct lttng_channel *__chan = __event->chan; \ |
| 719 | struct lttng_session *__session = __chan->session; \ |
| 720 | struct lib_ring_buffer_ctx __ctx; \ |
| 721 | size_t __event_len, __event_align; \ |
| 722 | size_t __dynamic_len_idx __attribute__((unused)) = 0; \ |
| 723 | union { \ |
| 724 | size_t __dynamic_len[ARRAY_SIZE(__event_fields___##_name)]; \ |
| 725 | char __filter_stack_data[2 * sizeof(unsigned long) * ARRAY_SIZE(__event_fields___##_name)]; \ |
| 726 | } __stackvar; \ |
| 727 | int __ret; \ |
| 728 | struct probe_local_vars __tp_locvar; \ |
| 729 | struct probe_local_vars *tp_locvar __attribute__((unused)) = \ |
| 730 | &__tp_locvar; \ |
| 731 | struct lttng_pid_tracker *__lpf; \ |
| 732 | \ |
| 733 | if (!_TP_SESSION_CHECK(session, __session)) \ |
| 734 | return; \ |
| 735 | if (unlikely(!ACCESS_ONCE(__session->active))) \ |
| 736 | return; \ |
| 737 | if (unlikely(!ACCESS_ONCE(__chan->enabled))) \ |
| 738 | return; \ |
| 739 | if (unlikely(!ACCESS_ONCE(__event->enabled))) \ |
| 740 | return; \ |
| 741 | __lpf = lttng_rcu_dereference(__session->pid_tracker); \ |
| 742 | if (__lpf && likely(!lttng_pid_tracker_lookup(__lpf, current->pid))) \ |
| 743 | return; \ |
| 744 | _code \ |
| 745 | if (unlikely(!list_empty(&__event->bytecode_runtime_head))) { \ |
| 746 | struct lttng_bytecode_runtime *bc_runtime; \ |
| 747 | int __filter_record = __event->has_enablers_without_bytecode; \ |
| 748 | \ |
| 749 | __event_prepare_filter_stack__##_name(__stackvar.__filter_stack_data, \ |
| 750 | tp_locvar, _args); \ |
| 751 | lttng_list_for_each_entry_rcu(bc_runtime, &__event->bytecode_runtime_head, node) { \ |
| 752 | if (unlikely(bc_runtime->filter(bc_runtime, \ |
| 753 | __stackvar.__filter_stack_data) & LTTNG_FILTER_RECORD_FLAG)) \ |
| 754 | __filter_record = 1; \ |
| 755 | } \ |
| 756 | if (likely(!__filter_record)) \ |
| 757 | return; \ |
| 758 | } \ |
| 759 | __event_len = __event_get_size__##_name(__stackvar.__dynamic_len, \ |
| 760 | tp_locvar, _args); \ |
| 761 | __event_align = __event_get_align__##_name(tp_locvar, _args); \ |
| 762 | lib_ring_buffer_ctx_init(&__ctx, __chan->chan, __event, __event_len, \ |
| 763 | __event_align, -1); \ |
| 764 | __ret = __chan->ops->event_reserve(&__ctx, __event->id); \ |
| 765 | if (__ret < 0) \ |
| 766 | return; \ |
| 767 | _fields \ |
| 768 | __chan->ops->event_commit(&__ctx); \ |
| 769 | } |
| 770 | |
| 771 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS |
| 772 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code, _fields) \ |
| 773 | static void __event_probe__##_name(void *__data) \ |
| 774 | { \ |
| 775 | struct probe_local_vars { _locvar }; \ |
| 776 | struct lttng_event *__event = __data; \ |
| 777 | struct lttng_channel *__chan = __event->chan; \ |
| 778 | struct lttng_session *__session = __chan->session; \ |
| 779 | struct lib_ring_buffer_ctx __ctx; \ |
| 780 | size_t __event_len, __event_align; \ |
| 781 | size_t __dynamic_len_idx __attribute__((unused)) = 0; \ |
| 782 | union { \ |
| 783 | size_t __dynamic_len[ARRAY_SIZE(__event_fields___##_name)]; \ |
| 784 | char __filter_stack_data[2 * sizeof(unsigned long) * ARRAY_SIZE(__event_fields___##_name)]; \ |
| 785 | } __stackvar; \ |
| 786 | int __ret; \ |
| 787 | struct probe_local_vars __tp_locvar; \ |
| 788 | struct probe_local_vars *tp_locvar __attribute__((unused)) = \ |
| 789 | &__tp_locvar; \ |
| 790 | struct lttng_pid_tracker *__lpf; \ |
| 791 | \ |
| 792 | if (!_TP_SESSION_CHECK(session, __session)) \ |
| 793 | return; \ |
| 794 | if (unlikely(!ACCESS_ONCE(__session->active))) \ |
| 795 | return; \ |
| 796 | if (unlikely(!ACCESS_ONCE(__chan->enabled))) \ |
| 797 | return; \ |
| 798 | if (unlikely(!ACCESS_ONCE(__event->enabled))) \ |
| 799 | return; \ |
| 800 | __lpf = lttng_rcu_dereference(__session->pid_tracker); \ |
| 801 | if (__lpf && likely(!lttng_pid_tracker_lookup(__lpf, current->pid))) \ |
| 802 | return; \ |
| 803 | _code \ |
| 804 | if (unlikely(!list_empty(&__event->bytecode_runtime_head))) { \ |
| 805 | struct lttng_bytecode_runtime *bc_runtime; \ |
| 806 | int __filter_record = __event->has_enablers_without_bytecode; \ |
| 807 | \ |
| 808 | __event_prepare_filter_stack__##_name(__stackvar.__filter_stack_data, \ |
| 809 | tp_locvar); \ |
| 810 | lttng_list_for_each_entry_rcu(bc_runtime, &__event->bytecode_runtime_head, node) { \ |
| 811 | if (unlikely(bc_runtime->filter(bc_runtime, \ |
| 812 | __stackvar.__filter_stack_data) & LTTNG_FILTER_RECORD_FLAG)) \ |
| 813 | __filter_record = 1; \ |
| 814 | } \ |
| 815 | if (likely(!__filter_record)) \ |
| 816 | return; \ |
| 817 | } \ |
| 818 | __event_len = __event_get_size__##_name(__stackvar.__dynamic_len, tp_locvar); \ |
| 819 | __event_align = __event_get_align__##_name(tp_locvar); \ |
| 820 | lib_ring_buffer_ctx_init(&__ctx, __chan->chan, __event, __event_len, \ |
| 821 | __event_align, -1); \ |
| 822 | __ret = __chan->ops->event_reserve(&__ctx, __event->id); \ |
| 823 | if (__ret < 0) \ |
| 824 | return; \ |
| 825 | _fields \ |
| 826 | __chan->ops->event_commit(&__ctx); \ |
| 827 | } |
| 828 | |
| 829 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| 830 | |
| 831 | #undef __get_dynamic_len |
| 832 | |
| 833 | /* |
| 834 | * Stage 7 of the trace events. |
| 835 | * |
| 836 | * Create event descriptions. |
| 837 | */ |
| 838 | |
| 839 | /* Named field types must be defined in lttng-types.h */ |
| 840 | |
| 841 | #include "lttng-events-reset.h" /* Reset all macros within LTTNG_TRACEPOINT_EVENT */ |
| 842 | |
| 843 | #ifndef TP_PROBE_CB |
| 844 | #define TP_PROBE_CB(_template) &__event_probe__##_template |
| 845 | #endif |
| 846 | |
| 847 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS |
| 848 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map) \ |
| 849 | static const struct lttng_event_desc __event_desc___##_map = { \ |
| 850 | .fields = __event_fields___##_template, \ |
| 851 | .name = #_map, \ |
| 852 | .kname = #_name, \ |
| 853 | .probe_callback = (void *) TP_PROBE_CB(_template), \ |
| 854 | .nr_fields = ARRAY_SIZE(__event_fields___##_template), \ |
| 855 | .owner = THIS_MODULE, \ |
| 856 | }; |
| 857 | |
| 858 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP |
| 859 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(_template, _name, _map, _proto, _args) \ |
| 860 | LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map) |
| 861 | |
| 862 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| 863 | |
| 864 | /* |
| 865 | * Stage 8 of the trace events. |
| 866 | * |
| 867 | * Create an array of event description pointers. |
| 868 | */ |
| 869 | |
| 870 | #include "lttng-events-reset.h" /* Reset all macros within LTTNG_TRACEPOINT_EVENT */ |
| 871 | |
| 872 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS |
| 873 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map) \ |
| 874 | &__event_desc___##_map, |
| 875 | |
| 876 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP |
| 877 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(_template, _name, _map, _proto, _args) \ |
| 878 | LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map) |
| 879 | |
| 880 | #define TP_ID1(_token, _system) _token##_system |
| 881 | #define TP_ID(_token, _system) TP_ID1(_token, _system) |
| 882 | |
| 883 | static const struct lttng_event_desc *TP_ID(__event_desc___, TRACE_SYSTEM)[] = { |
| 884 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| 885 | }; |
| 886 | |
| 887 | #undef TP_ID1 |
| 888 | #undef TP_ID |
| 889 | |
| 890 | /* |
| 891 | * Stage 9 of the trace events. |
| 892 | * |
| 893 | * Create a toplevel descriptor for the whole probe. |
| 894 | */ |
| 895 | |
| 896 | #define TP_ID1(_token, _system) _token##_system |
| 897 | #define TP_ID(_token, _system) TP_ID1(_token, _system) |
| 898 | |
| 899 | /* non-const because list head will be modified when registered. */ |
| 900 | static __used struct lttng_probe_desc TP_ID(__probe_desc___, TRACE_SYSTEM) = { |
| 901 | .provider = __stringify(TRACE_SYSTEM), |
| 902 | .event_desc = TP_ID(__event_desc___, TRACE_SYSTEM), |
| 903 | .nr_events = ARRAY_SIZE(TP_ID(__event_desc___, TRACE_SYSTEM)), |
| 904 | .head = { NULL, NULL }, |
| 905 | .lazy_init_head = { NULL, NULL }, |
| 906 | .lazy = 0, |
| 907 | }; |
| 908 | |
| 909 | #undef TP_ID1 |
| 910 | #undef TP_ID |
| 911 | |
| 912 | /* |
| 913 | * Stage 10 of the trace events. |
| 914 | * |
| 915 | * Register/unregister probes at module load/unload. |
| 916 | */ |
| 917 | |
| 918 | #include "lttng-events-reset.h" /* Reset all macros within LTTNG_TRACEPOINT_EVENT */ |
| 919 | |
| 920 | #define TP_ID1(_token, _system) _token##_system |
| 921 | #define TP_ID(_token, _system) TP_ID1(_token, _system) |
| 922 | #define module_init_eval1(_token, _system) module_init(_token##_system) |
| 923 | #define module_init_eval(_token, _system) module_init_eval1(_token, _system) |
| 924 | #define module_exit_eval1(_token, _system) module_exit(_token##_system) |
| 925 | #define module_exit_eval(_token, _system) module_exit_eval1(_token, _system) |
| 926 | |
| 927 | #ifndef TP_MODULE_NOINIT |
| 928 | static int TP_ID(__lttng_events_init__, TRACE_SYSTEM)(void) |
| 929 | { |
| 930 | wrapper_vmalloc_sync_all(); |
| 931 | return lttng_probe_register(&TP_ID(__probe_desc___, TRACE_SYSTEM)); |
| 932 | } |
| 933 | |
| 934 | static void TP_ID(__lttng_events_exit__, TRACE_SYSTEM)(void) |
| 935 | { |
| 936 | lttng_probe_unregister(&TP_ID(__probe_desc___, TRACE_SYSTEM)); |
| 937 | } |
| 938 | |
| 939 | #ifndef TP_MODULE_NOAUTOLOAD |
| 940 | module_init_eval(__lttng_events_init__, TRACE_SYSTEM); |
| 941 | module_exit_eval(__lttng_events_exit__, TRACE_SYSTEM); |
| 942 | #endif |
| 943 | |
| 944 | #endif |
| 945 | |
| 946 | #undef module_init_eval |
| 947 | #undef module_exit_eval |
| 948 | #undef TP_ID1 |
| 949 | #undef TP_ID |
| 950 | |
| 951 | #undef TP_PROTO |
| 952 | #undef TP_ARGS |