| 1 | /* |
| 2 | * lttng-events.h |
| 3 | * |
| 4 | * Copyright (C) 2009 Steven Rostedt <rostedt@goodmis.org> |
| 5 | * Copyright (C) 2009-2012 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 | #include <linux/uaccess.h> |
| 22 | #include <linux/debugfs.h> |
| 23 | #include "lttng.h" |
| 24 | #include "lttng-types.h" |
| 25 | #include "lttng-probe-user.h" |
| 26 | #include "../wrapper/vmalloc.h" /* for wrapper_vmalloc_sync_all() */ |
| 27 | #include "../wrapper/ringbuffer/frontend_types.h" |
| 28 | #include "../lttng-events.h" |
| 29 | #include "../lttng-tracer-core.h" |
| 30 | |
| 31 | /* |
| 32 | * Macro declarations used for all stages. |
| 33 | */ |
| 34 | |
| 35 | /* |
| 36 | * LTTng name mapping macros. LTTng remaps some of the kernel events to |
| 37 | * enforce name-spacing. |
| 38 | */ |
| 39 | #undef LTTNG_TRACEPOINT_EVENT_MAP |
| 40 | #define LTTNG_TRACEPOINT_EVENT_MAP(name, map, proto, args, tstruct, assign, print) \ |
| 41 | LTTNG_TRACEPOINT_EVENT_CLASS(map, \ |
| 42 | PARAMS(proto), \ |
| 43 | PARAMS(args), \ |
| 44 | PARAMS(tstruct), \ |
| 45 | PARAMS(assign), \ |
| 46 | PARAMS(print)) \ |
| 47 | LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(map, name, map, PARAMS(proto), PARAMS(args)) |
| 48 | |
| 49 | #undef LTTNG_TRACEPOINT_EVENT_MAP_NOARGS |
| 50 | #define LTTNG_TRACEPOINT_EVENT_MAP_NOARGS(name, map, tstruct, assign, print) \ |
| 51 | LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(map, \ |
| 52 | PARAMS(tstruct), \ |
| 53 | PARAMS(assign), \ |
| 54 | PARAMS(print)) \ |
| 55 | LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(map, name, map) |
| 56 | |
| 57 | #undef LTTNG_TRACEPOINT_EVENT_CODE |
| 58 | #define LTTNG_TRACEPOINT_EVENT_CODE(name, proto, args, _locvar, _code, tstruct, assign, print) \ |
| 59 | LTTNG_TRACEPOINT_EVENT_CLASS_CODE(name, \ |
| 60 | PARAMS(proto), \ |
| 61 | PARAMS(args), \ |
| 62 | PARAMS(_locvar), \ |
| 63 | PARAMS(_code), \ |
| 64 | PARAMS(tstruct), \ |
| 65 | PARAMS(assign), \ |
| 66 | PARAMS(print)) \ |
| 67 | LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(name, name, name, PARAMS(proto), PARAMS(args)) |
| 68 | |
| 69 | |
| 70 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_PRINT_MAP |
| 71 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_PRINT_MAP(template, name, map, proto, args, print) \ |
| 72 | LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(template, name, map, PARAMS(proto), PARAMS(args)) |
| 73 | |
| 74 | /* Callbacks are meaningless to LTTng. */ |
| 75 | #undef LTTNG_TRACEPOINT_EVENT_FN_MAP |
| 76 | #define LTTNG_TRACEPOINT_EVENT_FN_MAP(name, map, proto, args, tstruct, \ |
| 77 | assign, print, reg, unreg) \ |
| 78 | LTTNG_TRACEPOINT_EVENT_MAP(name, map, PARAMS(proto), PARAMS(args), \ |
| 79 | PARAMS(tstruct), PARAMS(assign), PARAMS(print)) |
| 80 | |
| 81 | #undef LTTNG_TRACEPOINT_EVENT_CONDITION_MAP |
| 82 | #define LTTNG_TRACEPOINT_EVENT_CONDITION_MAP(name, map, proto, args, cond, tstruct, assign, print) \ |
| 83 | LTTNG_TRACEPOINT_EVENT_MAP(name, map, \ |
| 84 | PARAMS(proto), \ |
| 85 | PARAMS(args), \ |
| 86 | PARAMS(tstruct), \ |
| 87 | PARAMS(assign), \ |
| 88 | PARAMS(print)) |
| 89 | |
| 90 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_CONDITION_MAP |
| 91 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_CONDITION_MAP(template, name, map, proto, args, cond) \ |
| 92 | LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(template, name, map, PARAMS(proto), PARAMS(args)) |
| 93 | |
| 94 | /* |
| 95 | * LTTNG_TRACEPOINT_EVENT_CLASS can be used to add a generic function |
| 96 | * handlers for events. That is, if all events have the same parameters |
| 97 | * and just have distinct trace points. Each tracepoint can be defined |
| 98 | * with LTTNG_TRACEPOINT_EVENT_INSTANCE and that will map the |
| 99 | * LTTNG_TRACEPOINT_EVENT_CLASS to the tracepoint. |
| 100 | * |
| 101 | * LTTNG_TRACEPOINT_EVENT is a one to one mapping between tracepoint and |
| 102 | * template. |
| 103 | */ |
| 104 | |
| 105 | #undef LTTNG_TRACEPOINT_EVENT |
| 106 | #define LTTNG_TRACEPOINT_EVENT(name, proto, args, tstruct, assign, print) \ |
| 107 | LTTNG_TRACEPOINT_EVENT_MAP(name, name, \ |
| 108 | PARAMS(proto), \ |
| 109 | PARAMS(args), \ |
| 110 | PARAMS(tstruct), \ |
| 111 | PARAMS(assign), \ |
| 112 | PARAMS(print)) |
| 113 | |
| 114 | #undef LTTNG_TRACEPOINT_EVENT_NOARGS |
| 115 | #define LTTNG_TRACEPOINT_EVENT_NOARGS(name, tstruct, assign, print) \ |
| 116 | LTTNG_TRACEPOINT_EVENT_MAP_NOARGS(name, name, \ |
| 117 | PARAMS(tstruct), \ |
| 118 | PARAMS(assign), \ |
| 119 | PARAMS(print)) |
| 120 | |
| 121 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_PRINT |
| 122 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_PRINT(template, name, proto, args, print) \ |
| 123 | LTTNG_TRACEPOINT_EVENT_INSTANCE_PRINT_MAP(template, name, name, \ |
| 124 | PARAMS(proto), PARAMS(args), PARAMS(print_)) |
| 125 | |
| 126 | #undef LTTNG_TRACEPOINT_EVENT_FN |
| 127 | #define LTTNG_TRACEPOINT_EVENT_FN(name, proto, args, tstruct, \ |
| 128 | assign, print, reg, unreg) \ |
| 129 | LTTNG_TRACEPOINT_EVENT_FN_MAP(name, name, PARAMS(proto), PARAMS(args), \ |
| 130 | PARAMS(tstruct), PARAMS(assign), PARAMS(print), \ |
| 131 | PARAMS(reg), PARAMS(unreg)) \ |
| 132 | |
| 133 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE |
| 134 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE(template, name, proto, args) \ |
| 135 | LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(template, name, name, PARAMS(proto), PARAMS(args)) |
| 136 | |
| 137 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS |
| 138 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS(template, name) \ |
| 139 | LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(template, name, name) |
| 140 | |
| 141 | #undef LTTNG_TRACEPOINT_EVENT_CONDITION |
| 142 | #define LTTNG_TRACEPOINT_EVENT_CONDITION(name, proto, args, cond, tstruct, assign, print) \ |
| 143 | LTTNG_TRACEPOINT_EVENT_CONDITION_MAP(name, name, \ |
| 144 | PARAMS(proto), \ |
| 145 | PARAMS(args), \ |
| 146 | PARAMS(cond), \ |
| 147 | PARAMS(tstruct), \ |
| 148 | PARAMS(assign), \ |
| 149 | PARAMS(print)) |
| 150 | |
| 151 | #undef LTTNG_TRACEPOINT_EVENT_CLASS |
| 152 | #define LTTNG_TRACEPOINT_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print) \ |
| 153 | LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, PARAMS(_proto), PARAMS(_args), , , \ |
| 154 | PARAMS(_tstruct), PARAMS(_assign), PARAMS(_print)) |
| 155 | |
| 156 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS |
| 157 | #define LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(_name, _tstruct, _assign, _print) \ |
| 158 | LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, , , PARAMS(_tstruct), \ |
| 159 | PARAMS(_assign), PARAMS(_print)) |
| 160 | |
| 161 | |
| 162 | /* |
| 163 | * Stage 1 of the trace events. |
| 164 | * |
| 165 | * Create dummy trace calls for each events, verifying that the LTTng module |
| 166 | * instrumentation headers match the kernel arguments. Will be optimized |
| 167 | * out by the compiler. |
| 168 | */ |
| 169 | |
| 170 | #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */ |
| 171 | |
| 172 | #undef TP_PROTO |
| 173 | #define TP_PROTO(args...) args |
| 174 | |
| 175 | #undef TP_ARGS |
| 176 | #define TP_ARGS(args...) args |
| 177 | |
| 178 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP |
| 179 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(_template, _name, _map, _proto, _args) \ |
| 180 | void trace_##_name(_proto); |
| 181 | |
| 182 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS |
| 183 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map) \ |
| 184 | void trace_##_name(void *__data); |
| 185 | |
| 186 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| 187 | |
| 188 | /* |
| 189 | * Stage 2 of the trace events. |
| 190 | * |
| 191 | * Create event field type metadata section. |
| 192 | * Each event produce an array of fields. |
| 193 | */ |
| 194 | |
| 195 | #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */ |
| 196 | |
| 197 | /* Named field types must be defined in lttng-types.h */ |
| 198 | |
| 199 | #undef __field_full |
| 200 | #define __field_full(_type, _item, _order, _base) \ |
| 201 | { \ |
| 202 | .name = #_item, \ |
| 203 | .type = __type_integer(_type, _order, _base, none), \ |
| 204 | }, |
| 205 | |
| 206 | #undef __field |
| 207 | #define __field(_type, _item) \ |
| 208 | __field_full(_type, _item, __BYTE_ORDER, 10) |
| 209 | |
| 210 | #undef __field_ext |
| 211 | #define __field_ext(_type, _item, _filter_type) \ |
| 212 | __field(_type, _item) |
| 213 | |
| 214 | #undef __field_hex |
| 215 | #define __field_hex(_type, _item) \ |
| 216 | __field_full(_type, _item, __BYTE_ORDER, 16) |
| 217 | |
| 218 | #undef __field_oct |
| 219 | #define __field_oct(_type, _item) \ |
| 220 | __field_full(_type, _item, __BYTE_ORDER, 8) |
| 221 | |
| 222 | #undef __field_network |
| 223 | #define __field_network(_type, _item) \ |
| 224 | __field_full(_type, _item, __BIG_ENDIAN, 10) |
| 225 | |
| 226 | #undef __field_network_hex |
| 227 | #define __field_network_hex(_type, _item) \ |
| 228 | __field_full(_type, _item, __BIG_ENDIAN, 16) |
| 229 | |
| 230 | #undef __array_enc_ext |
| 231 | #define __array_enc_ext(_type, _item, _length, _order, _base, _encoding)\ |
| 232 | { \ |
| 233 | .name = #_item, \ |
| 234 | .type = \ |
| 235 | { \ |
| 236 | .atype = atype_array, \ |
| 237 | .u.array = \ |
| 238 | { \ |
| 239 | .length = _length, \ |
| 240 | .elem_type = __type_integer(_type, _order, _base, _encoding), \ |
| 241 | }, \ |
| 242 | }, \ |
| 243 | }, |
| 244 | |
| 245 | #undef __array |
| 246 | #define __array(_type, _item, _length) \ |
| 247 | __array_enc_ext(_type, _item, _length, __BYTE_ORDER, 10, none) |
| 248 | |
| 249 | #undef __array_text |
| 250 | #define __array_text(_type, _item, _length) \ |
| 251 | __array_enc_ext(_type, _item, _length, __BYTE_ORDER, 10, UTF8) |
| 252 | |
| 253 | #undef __array_hex |
| 254 | #define __array_hex(_type, _item, _length) \ |
| 255 | __array_enc_ext(_type, _item, _length, __BYTE_ORDER, 16, none) |
| 256 | |
| 257 | #undef __dynamic_array_enc_ext |
| 258 | #define __dynamic_array_enc_ext(_type, _item, _length, _order, _base, _encoding) \ |
| 259 | { \ |
| 260 | .name = #_item, \ |
| 261 | .type = \ |
| 262 | { \ |
| 263 | .atype = atype_sequence, \ |
| 264 | .u.sequence = \ |
| 265 | { \ |
| 266 | .length_type = __type_integer(u32, __BYTE_ORDER, 10, none), \ |
| 267 | .elem_type = __type_integer(_type, _order, _base, _encoding), \ |
| 268 | }, \ |
| 269 | }, \ |
| 270 | }, |
| 271 | |
| 272 | #undef __dynamic_array_enc_ext_2 |
| 273 | #define __dynamic_array_enc_ext_2(_type, _item, _length1, _length2, _order, _base, _encoding) \ |
| 274 | __dynamic_array_enc_ext(_type, _item, _length1 + _length2, _order, _base, _encoding) |
| 275 | |
| 276 | #undef __dynamic_array |
| 277 | #define __dynamic_array(_type, _item, _length) \ |
| 278 | __dynamic_array_enc_ext(_type, _item, _length, __BYTE_ORDER, 10, none) |
| 279 | |
| 280 | #undef __dynamic_array_text |
| 281 | #define __dynamic_array_text(_type, _item, _length) \ |
| 282 | __dynamic_array_enc_ext(_type, _item, _length, __BYTE_ORDER, 10, UTF8) |
| 283 | |
| 284 | #undef __dynamic_array_hex |
| 285 | #define __dynamic_array_hex(_type, _item, _length) \ |
| 286 | __dynamic_array_enc_ext(_type, _item, _length, __BYTE_ORDER, 16, none) |
| 287 | |
| 288 | #undef __dynamic_array_network_hex |
| 289 | #define __dynamic_array_network_hex(_type, _item, _length) \ |
| 290 | __dynamic_array_enc_ext(_type, _item, _length, __BIG_ENDIAN, 16, none) |
| 291 | |
| 292 | #undef __dynamic_array_network |
| 293 | #define __dynamic_array_network(_type, _item, _length) \ |
| 294 | __dynamic_array_enc_ext(_type, _item, _length, __BIG_ENDIAN, 10, none) |
| 295 | |
| 296 | #undef __dynamic_array_text_2 |
| 297 | #define __dynamic_array_text_2(_type, _item, _length1, _length2) \ |
| 298 | __dynamic_array_enc_ext_2(_type, _item, _length1, _length2, __BYTE_ORDER, 10, UTF8) |
| 299 | |
| 300 | #undef __string |
| 301 | #define __string(_item, _src) \ |
| 302 | { \ |
| 303 | .name = #_item, \ |
| 304 | .type = \ |
| 305 | { \ |
| 306 | .atype = atype_string, \ |
| 307 | .u.basic.string.encoding = lttng_encode_UTF8, \ |
| 308 | }, \ |
| 309 | }, |
| 310 | |
| 311 | #undef __string_from_user |
| 312 | #define __string_from_user(_item, _src) \ |
| 313 | __string(_item, _src) |
| 314 | |
| 315 | #undef TP_STRUCT__entry |
| 316 | #define TP_STRUCT__entry(args...) args /* Only one used in this phase */ |
| 317 | |
| 318 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS |
| 319 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code, _tstruct, _assign, _print) \ |
| 320 | static const struct lttng_event_field __event_fields___##_name[] = { \ |
| 321 | _tstruct \ |
| 322 | }; |
| 323 | |
| 324 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE |
| 325 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code, _tstruct, _assign, _print) \ |
| 326 | LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code, PARAMS(_tstruct), PARAMS(_assign), \ |
| 327 | PARAMS(_print)) |
| 328 | |
| 329 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| 330 | |
| 331 | /* |
| 332 | * Stage 3 of the trace events. |
| 333 | * |
| 334 | * Create probe callback prototypes. |
| 335 | */ |
| 336 | |
| 337 | #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */ |
| 338 | |
| 339 | #undef TP_PROTO |
| 340 | #define TP_PROTO(args...) args |
| 341 | |
| 342 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE |
| 343 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code, _tstruct, _assign, _print) \ |
| 344 | static void __event_probe__##_name(void *__data, _proto); |
| 345 | |
| 346 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS |
| 347 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code, _tstruct, _assign, _print) \ |
| 348 | static void __event_probe__##_name(void *__data); |
| 349 | |
| 350 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| 351 | |
| 352 | /* |
| 353 | * Stage 3.9 of the trace events. |
| 354 | * |
| 355 | * Create event descriptions. |
| 356 | */ |
| 357 | |
| 358 | /* Named field types must be defined in lttng-types.h */ |
| 359 | |
| 360 | #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */ |
| 361 | |
| 362 | #ifndef TP_PROBE_CB |
| 363 | #define TP_PROBE_CB(_template) &__event_probe__##_template |
| 364 | #endif |
| 365 | |
| 366 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS |
| 367 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map) \ |
| 368 | static const struct lttng_event_desc __event_desc___##_map = { \ |
| 369 | .fields = __event_fields___##_template, \ |
| 370 | .name = #_map, \ |
| 371 | .kname = #_name, \ |
| 372 | .probe_callback = (void *) TP_PROBE_CB(_template), \ |
| 373 | .nr_fields = ARRAY_SIZE(__event_fields___##_template), \ |
| 374 | .owner = THIS_MODULE, \ |
| 375 | }; |
| 376 | |
| 377 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP |
| 378 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(_template, _name, _map, _proto, _args) \ |
| 379 | LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map) |
| 380 | |
| 381 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| 382 | |
| 383 | |
| 384 | /* |
| 385 | * Stage 4 of the trace events. |
| 386 | * |
| 387 | * Create an array of event description pointers. |
| 388 | */ |
| 389 | |
| 390 | /* Named field types must be defined in lttng-types.h */ |
| 391 | |
| 392 | #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */ |
| 393 | |
| 394 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS |
| 395 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map) \ |
| 396 | &__event_desc___##_map, |
| 397 | |
| 398 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP |
| 399 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(_template, _name, _map, _proto, _args) \ |
| 400 | LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map) |
| 401 | |
| 402 | #define TP_ID1(_token, _system) _token##_system |
| 403 | #define TP_ID(_token, _system) TP_ID1(_token, _system) |
| 404 | |
| 405 | static const struct lttng_event_desc *TP_ID(__event_desc___, TRACE_SYSTEM)[] = { |
| 406 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| 407 | }; |
| 408 | |
| 409 | #undef TP_ID1 |
| 410 | #undef TP_ID |
| 411 | |
| 412 | |
| 413 | /* |
| 414 | * Stage 5 of the trace events. |
| 415 | * |
| 416 | * Create a toplevel descriptor for the whole probe. |
| 417 | */ |
| 418 | |
| 419 | #define TP_ID1(_token, _system) _token##_system |
| 420 | #define TP_ID(_token, _system) TP_ID1(_token, _system) |
| 421 | |
| 422 | /* non-const because list head will be modified when registered. */ |
| 423 | static __used struct lttng_probe_desc TP_ID(__probe_desc___, TRACE_SYSTEM) = { |
| 424 | .event_desc = TP_ID(__event_desc___, TRACE_SYSTEM), |
| 425 | .nr_events = ARRAY_SIZE(TP_ID(__event_desc___, TRACE_SYSTEM)), |
| 426 | }; |
| 427 | |
| 428 | #undef TP_ID1 |
| 429 | #undef TP_ID |
| 430 | |
| 431 | /* |
| 432 | * Stage 6 of the trace events. |
| 433 | * |
| 434 | * Create static inline function that calculates event size. |
| 435 | */ |
| 436 | |
| 437 | #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */ |
| 438 | |
| 439 | /* Named field types must be defined in lttng-types.h */ |
| 440 | |
| 441 | #undef __field_full |
| 442 | #define __field_full(_type, _item, _order, _base) \ |
| 443 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ |
| 444 | __event_len += sizeof(_type); |
| 445 | |
| 446 | #undef __array_enc_ext |
| 447 | #define __array_enc_ext(_type, _item, _length, _order, _base, _encoding) \ |
| 448 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ |
| 449 | __event_len += sizeof(_type) * (_length); |
| 450 | |
| 451 | #undef __dynamic_array_enc_ext |
| 452 | #define __dynamic_array_enc_ext(_type, _item, _length, _order, _base, _encoding)\ |
| 453 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(u32)); \ |
| 454 | __event_len += sizeof(u32); \ |
| 455 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ |
| 456 | __dynamic_len[__dynamic_len_idx] = (_length); \ |
| 457 | __event_len += sizeof(_type) * __dynamic_len[__dynamic_len_idx]; \ |
| 458 | __dynamic_len_idx++; |
| 459 | |
| 460 | #undef __dynamic_array_enc_ext_2 |
| 461 | #define __dynamic_array_enc_ext_2(_type, _item, _length1, _length2, _order, _base, _encoding)\ |
| 462 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(u32)); \ |
| 463 | __event_len += sizeof(u32); \ |
| 464 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ |
| 465 | __dynamic_len[__dynamic_len_idx] = (_length1); \ |
| 466 | __event_len += sizeof(_type) * __dynamic_len[__dynamic_len_idx]; \ |
| 467 | __dynamic_len_idx++; \ |
| 468 | __dynamic_len[__dynamic_len_idx] = (_length2); \ |
| 469 | __event_len += sizeof(_type) * __dynamic_len[__dynamic_len_idx]; \ |
| 470 | __dynamic_len_idx++; |
| 471 | |
| 472 | #undef __string |
| 473 | #define __string(_item, _src) \ |
| 474 | __event_len += __dynamic_len[__dynamic_len_idx++] = strlen(_src) + 1; |
| 475 | |
| 476 | /* |
| 477 | * strlen_user includes \0. If returns 0, it faulted, so we set size to |
| 478 | * 1 (\0 only). |
| 479 | */ |
| 480 | #undef __string_from_user |
| 481 | #define __string_from_user(_item, _src) \ |
| 482 | __event_len += __dynamic_len[__dynamic_len_idx++] = \ |
| 483 | max_t(size_t, lttng_strlen_user_inatomic(_src), 1); |
| 484 | |
| 485 | #undef TP_PROTO |
| 486 | #define TP_PROTO(args...) args |
| 487 | |
| 488 | #undef TP_STRUCT__entry |
| 489 | #define TP_STRUCT__entry(args...) args |
| 490 | |
| 491 | #undef TP_locvar |
| 492 | #define TP_locvar(...) __VA_ARGS__ |
| 493 | |
| 494 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE |
| 495 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code, _tstruct, _assign, _print) \ |
| 496 | static inline size_t __event_get_size__##_name(size_t *__dynamic_len, \ |
| 497 | void *__tp_locvar, _proto) \ |
| 498 | { \ |
| 499 | size_t __event_len = 0; \ |
| 500 | unsigned int __dynamic_len_idx __attribute__((unused)) = 0; \ |
| 501 | struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \ |
| 502 | \ |
| 503 | _tstruct \ |
| 504 | return __event_len; \ |
| 505 | } |
| 506 | |
| 507 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS |
| 508 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code, _tstruct, _assign, _print) \ |
| 509 | static inline size_t __event_get_size__##_name(size_t *__dynamic_len, \ |
| 510 | void *__tp_locvar) \ |
| 511 | { \ |
| 512 | size_t __event_len = 0; \ |
| 513 | unsigned int __dynamic_len_idx __attribute__((unused)) = 0; \ |
| 514 | struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \ |
| 515 | \ |
| 516 | _tstruct \ |
| 517 | return __event_len; \ |
| 518 | } |
| 519 | |
| 520 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| 521 | |
| 522 | /* |
| 523 | * Stage 7 of the trace events. |
| 524 | * |
| 525 | * Create static inline function that calculates event payload alignment. |
| 526 | */ |
| 527 | |
| 528 | #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */ |
| 529 | |
| 530 | /* Named field types must be defined in lttng-types.h */ |
| 531 | |
| 532 | #undef __field_full |
| 533 | #define __field_full(_type, _item, _order, _base) \ |
| 534 | __event_align = max_t(size_t, __event_align, lttng_alignof(_type)); |
| 535 | |
| 536 | #undef __array_enc_ext |
| 537 | #define __array_enc_ext(_type, _item, _length, _order, _base, _encoding) \ |
| 538 | __event_align = max_t(size_t, __event_align, lttng_alignof(_type)); |
| 539 | |
| 540 | #undef __dynamic_array_enc_ext |
| 541 | #define __dynamic_array_enc_ext(_type, _item, _length, _order, _base, _encoding)\ |
| 542 | __event_align = max_t(size_t, __event_align, lttng_alignof(u32)); \ |
| 543 | __event_align = max_t(size_t, __event_align, lttng_alignof(_type)); |
| 544 | |
| 545 | #undef __dynamic_array_enc_ext_2 |
| 546 | #define __dynamic_array_enc_ext_2(_type, _item, _length1, _length2, _order, _base, _encoding)\ |
| 547 | __dynamic_array_enc_ext(_type, _item, _length1 + _length2, _order, _base, _encoding) |
| 548 | |
| 549 | #undef __string |
| 550 | #define __string(_item, _src) |
| 551 | |
| 552 | #undef __string_from_user |
| 553 | #define __string_from_user(_item, _src) |
| 554 | |
| 555 | #undef TP_PROTO |
| 556 | #define TP_PROTO(args...) args |
| 557 | |
| 558 | #undef TP_STRUCT__entry |
| 559 | #define TP_STRUCT__entry(args...) args |
| 560 | |
| 561 | #undef TP_locvar |
| 562 | #define TP_locvar(...) __VA_ARGS__ |
| 563 | |
| 564 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE |
| 565 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code, _tstruct, _assign, _print) \ |
| 566 | static inline size_t __event_get_align__##_name(void *__tp_locvar, _proto) \ |
| 567 | { \ |
| 568 | size_t __event_align = 1; \ |
| 569 | struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \ |
| 570 | \ |
| 571 | _tstruct \ |
| 572 | return __event_align; \ |
| 573 | } |
| 574 | |
| 575 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS |
| 576 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code, _tstruct, _assign, _print) \ |
| 577 | static inline size_t __event_get_align__##_name(void *__tp_locvar) \ |
| 578 | { \ |
| 579 | size_t __event_align = 1; \ |
| 580 | struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \ |
| 581 | \ |
| 582 | _tstruct \ |
| 583 | return __event_align; \ |
| 584 | } |
| 585 | |
| 586 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| 587 | |
| 588 | /* |
| 589 | * Stage 8 of the trace events. |
| 590 | * |
| 591 | * Create structure declaration that allows the "assign" macros to access the |
| 592 | * field types. |
| 593 | */ |
| 594 | |
| 595 | #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */ |
| 596 | |
| 597 | /* Named field types must be defined in lttng-types.h */ |
| 598 | |
| 599 | #undef __field_full |
| 600 | #define __field_full(_type, _item, _order, _base) _type _item; |
| 601 | |
| 602 | #undef __array_enc_ext |
| 603 | #define __array_enc_ext(_type, _item, _length, _order, _base, _encoding) \ |
| 604 | _type _item; |
| 605 | |
| 606 | #undef __dynamic_array_enc_ext |
| 607 | #define __dynamic_array_enc_ext(_type, _item, _length, _order, _base, _encoding)\ |
| 608 | _type _item; |
| 609 | |
| 610 | #undef __dynamic_array_enc_ext_2 |
| 611 | #define __dynamic_array_enc_ext_2(_type, _item, _length1, _length2, _order, _base, _encoding)\ |
| 612 | __dynamic_array_enc_ext(_type, _item, _length1 + _length2, _order, _base, _encoding) |
| 613 | |
| 614 | #undef __string |
| 615 | #define __string(_item, _src) char _item; |
| 616 | |
| 617 | #undef __string_from_user |
| 618 | #define __string_from_user(_item, _src) \ |
| 619 | __string(_item, _src) |
| 620 | |
| 621 | #undef TP_STRUCT__entry |
| 622 | #define TP_STRUCT__entry(args...) args |
| 623 | |
| 624 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS |
| 625 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code, _tstruct, _assign, _print) \ |
| 626 | struct __event_typemap__##_name { \ |
| 627 | _tstruct \ |
| 628 | }; |
| 629 | |
| 630 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE |
| 631 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code, _tstruct, _assign, _print) \ |
| 632 | LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code, _tstruct, _assign, _print) |
| 633 | |
| 634 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| 635 | |
| 636 | |
| 637 | /* |
| 638 | * Stage 9 of the trace events. |
| 639 | * |
| 640 | * Create the probe function : call even size calculation and write event data |
| 641 | * into the buffer. |
| 642 | * |
| 643 | * We use both the field and assignment macros to write the fields in the order |
| 644 | * defined in the field declaration. The field declarations control the |
| 645 | * execution order, jumping to the appropriate assignment block. |
| 646 | */ |
| 647 | |
| 648 | #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */ |
| 649 | |
| 650 | #undef __field_full |
| 651 | #define __field_full(_type, _item, _order, _base) \ |
| 652 | goto __assign_##_item; \ |
| 653 | __end_field_##_item: |
| 654 | |
| 655 | #undef __array_enc_ext |
| 656 | #define __array_enc_ext(_type, _item, _length, _order, _base, _encoding)\ |
| 657 | goto __assign_##_item; \ |
| 658 | __end_field_##_item: |
| 659 | |
| 660 | #undef __dynamic_array_enc_ext |
| 661 | #define __dynamic_array_enc_ext(_type, _item, _length, _order, _base, _encoding)\ |
| 662 | goto __assign_##_item##_1; \ |
| 663 | __end_field_##_item##_1: \ |
| 664 | goto __assign_##_item##_2; \ |
| 665 | __end_field_##_item##_2: |
| 666 | |
| 667 | #undef __dynamic_array_enc_ext_2 |
| 668 | #define __dynamic_array_enc_ext_2(_type, _item, _length1, _length2, _order, _base, _encoding)\ |
| 669 | goto __assign_##_item##_1; \ |
| 670 | __end_field_##_item##_1: \ |
| 671 | goto __assign_##_item##_2; \ |
| 672 | __end_field_##_item##_2: \ |
| 673 | goto __assign_##_item##_3; \ |
| 674 | __end_field_##_item##_3: |
| 675 | |
| 676 | #undef __string |
| 677 | #define __string(_item, _src) \ |
| 678 | goto __assign_##_item; \ |
| 679 | __end_field_##_item: |
| 680 | |
| 681 | #undef __string_from_user |
| 682 | #define __string_from_user(_item, _src) \ |
| 683 | __string(_item, _src) |
| 684 | |
| 685 | /* |
| 686 | * Macros mapping tp_assign() to "=", tp_memcpy() to memcpy() and tp_strcpy() to |
| 687 | * strcpy(). |
| 688 | */ |
| 689 | #undef tp_assign |
| 690 | #define tp_assign(dest, src) \ |
| 691 | __assign_##dest: \ |
| 692 | { \ |
| 693 | __typeof__(__typemap.dest) __tmp = (src); \ |
| 694 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__tmp)); \ |
| 695 | __chan->ops->event_write(&__ctx, &__tmp, sizeof(__tmp));\ |
| 696 | } \ |
| 697 | goto __end_field_##dest; |
| 698 | |
| 699 | /* fixed length array memcpy */ |
| 700 | #undef tp_memcpy_gen |
| 701 | #define tp_memcpy_gen(write_ops, dest, src, len) \ |
| 702 | __assign_##dest: \ |
| 703 | if (0) \ |
| 704 | (void) __typemap.dest; \ |
| 705 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__typemap.dest)); \ |
| 706 | __chan->ops->write_ops(&__ctx, src, len); \ |
| 707 | goto __end_field_##dest; |
| 708 | |
| 709 | #undef tp_memcpy |
| 710 | #define tp_memcpy(dest, src, len) \ |
| 711 | tp_memcpy_gen(event_write, dest, src, len) |
| 712 | |
| 713 | #undef tp_memcpy_from_user |
| 714 | #define tp_memcpy_from_user(dest, src, len) \ |
| 715 | tp_memcpy_gen(event_write_from_user, dest, src, len) |
| 716 | |
| 717 | /* variable length sequence memcpy */ |
| 718 | #undef tp_memcpy_dyn_gen |
| 719 | #define tp_memcpy_dyn_gen(write_ops, dest, src) \ |
| 720 | __assign_##dest##_1: \ |
| 721 | { \ |
| 722 | u32 __tmpl = __dynamic_len[__dynamic_len_idx]; \ |
| 723 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(u32)); \ |
| 724 | __chan->ops->event_write(&__ctx, &__tmpl, sizeof(u32)); \ |
| 725 | } \ |
| 726 | goto __end_field_##dest##_1; \ |
| 727 | __assign_##dest##_2: \ |
| 728 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__typemap.dest)); \ |
| 729 | __chan->ops->write_ops(&__ctx, src, \ |
| 730 | sizeof(__typemap.dest) * __get_dynamic_array_len(dest));\ |
| 731 | goto __end_field_##dest##_2; |
| 732 | |
| 733 | #undef tp_memcpy_dyn_gen_2 |
| 734 | #define tp_memcpy_dyn_gen_2(write_ops, dest, src1, src2) \ |
| 735 | __assign_##dest##_1: \ |
| 736 | { \ |
| 737 | u32 __tmpl = __dynamic_len[__dynamic_len_idx] \ |
| 738 | + __dynamic_len[__dynamic_len_idx + 1]; \ |
| 739 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(u32)); \ |
| 740 | __chan->ops->event_write(&__ctx, &__tmpl, sizeof(u32)); \ |
| 741 | } \ |
| 742 | goto __end_field_##dest##_1; \ |
| 743 | __assign_##dest##_2: \ |
| 744 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__typemap.dest)); \ |
| 745 | __chan->ops->write_ops(&__ctx, src1, \ |
| 746 | sizeof(__typemap.dest) * __get_dynamic_array_len(dest));\ |
| 747 | goto __end_field_##dest##_2; \ |
| 748 | __assign_##dest##_3: \ |
| 749 | __chan->ops->write_ops(&__ctx, src2, \ |
| 750 | sizeof(__typemap.dest) * __get_dynamic_array_len(dest));\ |
| 751 | goto __end_field_##dest##_3; |
| 752 | |
| 753 | #undef tp_memcpy_dyn |
| 754 | #define tp_memcpy_dyn(dest, src) \ |
| 755 | tp_memcpy_dyn_gen(event_write, dest, src) |
| 756 | |
| 757 | #undef tp_memcpy_dyn_2 |
| 758 | #define tp_memcpy_dyn_2(dest, src1, src2) \ |
| 759 | tp_memcpy_dyn_gen_2(event_write, dest, src1, src2) |
| 760 | |
| 761 | #undef tp_memcpy_dyn_from_user |
| 762 | #define tp_memcpy_dyn_from_user(dest, src) \ |
| 763 | tp_memcpy_dyn_gen(event_write_from_user, dest, src) |
| 764 | |
| 765 | /* |
| 766 | * The string length including the final \0. |
| 767 | */ |
| 768 | #undef tp_copy_string_from_user |
| 769 | #define tp_copy_string_from_user(dest, src) \ |
| 770 | __assign_##dest: \ |
| 771 | if (0) \ |
| 772 | (void) __typemap.dest; \ |
| 773 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__typemap.dest)); \ |
| 774 | __chan->ops->event_strcpy_from_user(&__ctx, src, \ |
| 775 | __get_dynamic_array_len(dest)); \ |
| 776 | goto __end_field_##dest; |
| 777 | |
| 778 | #undef tp_strcpy |
| 779 | #define tp_strcpy(dest, src) \ |
| 780 | __assign_##dest: \ |
| 781 | if (0) \ |
| 782 | (void) __typemap.dest; \ |
| 783 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__typemap.dest)); \ |
| 784 | __chan->ops->event_strcpy(&__ctx, src, __get_dynamic_array_len(dest)); \ |
| 785 | goto __end_field_##dest; |
| 786 | |
| 787 | /* Named field types must be defined in lttng-types.h */ |
| 788 | |
| 789 | #undef __get_str |
| 790 | #define __get_str(field) field |
| 791 | |
| 792 | #undef __get_dynamic_array |
| 793 | #define __get_dynamic_array(field) field |
| 794 | |
| 795 | /* Beware: this get len actually consumes the len value */ |
| 796 | #undef __get_dynamic_array_len |
| 797 | #define __get_dynamic_array_len(field) __dynamic_len[__dynamic_len_idx++] |
| 798 | |
| 799 | #undef TP_PROTO |
| 800 | #define TP_PROTO(args...) args |
| 801 | |
| 802 | #undef TP_ARGS |
| 803 | #define TP_ARGS(args...) args |
| 804 | |
| 805 | #undef TP_STRUCT__entry |
| 806 | #define TP_STRUCT__entry(args...) args |
| 807 | |
| 808 | #undef TP_fast_assign |
| 809 | #define TP_fast_assign(args...) args |
| 810 | |
| 811 | #undef TP_locvar |
| 812 | #define TP_locvar(...) __VA_ARGS__ |
| 813 | |
| 814 | #undef TP_code |
| 815 | #define TP_code(...) __VA_ARGS__ |
| 816 | |
| 817 | /* |
| 818 | * For state dump, check that "session" argument (mandatory) matches the |
| 819 | * session this event belongs to. Ensures that we write state dump data only |
| 820 | * into the started session, not into all sessions. |
| 821 | */ |
| 822 | #ifdef TP_SESSION_CHECK |
| 823 | #define _TP_SESSION_CHECK(session, csession) (session == csession) |
| 824 | #else /* TP_SESSION_CHECK */ |
| 825 | #define _TP_SESSION_CHECK(session, csession) 1 |
| 826 | #endif /* TP_SESSION_CHECK */ |
| 827 | |
| 828 | /* |
| 829 | * __dynamic_len array length is twice the number of fields due to |
| 830 | * __dynamic_array_enc_ext_2() and tp_memcpy_dyn_2(), which are the |
| 831 | * worse case, needing 2 entries per field. |
| 832 | */ |
| 833 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE |
| 834 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code, _tstruct, _assign, _print) \ |
| 835 | static void __event_probe__##_name(void *__data, _proto) \ |
| 836 | { \ |
| 837 | struct probe_local_vars { _locvar }; \ |
| 838 | struct lttng_event *__event = __data; \ |
| 839 | struct lttng_channel *__chan = __event->chan; \ |
| 840 | struct lttng_session *__session = __chan->session; \ |
| 841 | struct lib_ring_buffer_ctx __ctx; \ |
| 842 | size_t __event_len, __event_align; \ |
| 843 | size_t __dynamic_len_idx __attribute__((unused)) = 0; \ |
| 844 | size_t __dynamic_len[2 * ARRAY_SIZE(__event_fields___##_name)] __attribute__((unused)); \ |
| 845 | struct __event_typemap__##_name __typemap __attribute__((unused)); \ |
| 846 | int __ret; \ |
| 847 | struct probe_local_vars __tp_locvar; \ |
| 848 | struct probe_local_vars *tp_locvar __attribute__((unused)) = \ |
| 849 | &__tp_locvar; \ |
| 850 | struct lttng_pid_tracker *__lpf; \ |
| 851 | \ |
| 852 | if (!_TP_SESSION_CHECK(session, __session)) \ |
| 853 | return; \ |
| 854 | if (unlikely(!ACCESS_ONCE(__session->active))) \ |
| 855 | return; \ |
| 856 | if (unlikely(!ACCESS_ONCE(__chan->enabled))) \ |
| 857 | return; \ |
| 858 | if (unlikely(!ACCESS_ONCE(__event->enabled))) \ |
| 859 | return; \ |
| 860 | __lpf = rcu_dereference(__session->pid_tracker); \ |
| 861 | if (__lpf && likely(!lttng_pid_tracker_lookup(__lpf, current->pid))) \ |
| 862 | return; \ |
| 863 | _code \ |
| 864 | __event_len = __event_get_size__##_name(__dynamic_len, tp_locvar, \ |
| 865 | _args); \ |
| 866 | __event_align = __event_get_align__##_name(tp_locvar, _args); \ |
| 867 | lib_ring_buffer_ctx_init(&__ctx, __chan->chan, __event, __event_len, \ |
| 868 | __event_align, -1); \ |
| 869 | __ret = __chan->ops->event_reserve(&__ctx, __event->id); \ |
| 870 | if (__ret < 0) \ |
| 871 | return; \ |
| 872 | /* Control code (field ordering) */ \ |
| 873 | _tstruct \ |
| 874 | __chan->ops->event_commit(&__ctx); \ |
| 875 | return; \ |
| 876 | /* Copy code, steered by control code */ \ |
| 877 | _assign \ |
| 878 | } |
| 879 | |
| 880 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS |
| 881 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code, _tstruct, _assign, _print) \ |
| 882 | static void __event_probe__##_name(void *__data) \ |
| 883 | { \ |
| 884 | struct probe_local_vars { _locvar }; \ |
| 885 | struct lttng_event *__event = __data; \ |
| 886 | struct lttng_channel *__chan = __event->chan; \ |
| 887 | struct lttng_session *__session = __chan->session; \ |
| 888 | struct lib_ring_buffer_ctx __ctx; \ |
| 889 | size_t __event_len, __event_align; \ |
| 890 | size_t __dynamic_len_idx __attribute__((unused)) = 0; \ |
| 891 | size_t __dynamic_len[2 * ARRAY_SIZE(__event_fields___##_name)] __attribute__((unused)); \ |
| 892 | struct __event_typemap__##_name __typemap __attribute__((unused)); \ |
| 893 | int __ret; \ |
| 894 | struct probe_local_vars __tp_locvar; \ |
| 895 | struct probe_local_vars *tp_locvar __attribute__((unused)) = \ |
| 896 | &__tp_locvar; \ |
| 897 | struct lttng_pid_tracker *__lpf; \ |
| 898 | \ |
| 899 | if (!_TP_SESSION_CHECK(session, __session)) \ |
| 900 | return; \ |
| 901 | if (unlikely(!ACCESS_ONCE(__session->active))) \ |
| 902 | return; \ |
| 903 | if (unlikely(!ACCESS_ONCE(__chan->enabled))) \ |
| 904 | return; \ |
| 905 | if (unlikely(!ACCESS_ONCE(__event->enabled))) \ |
| 906 | return; \ |
| 907 | __lpf = rcu_dereference(__session->pid_tracker); \ |
| 908 | if (__lpf && likely(!lttng_pid_tracker_lookup(__lpf, current->pid))) \ |
| 909 | return; \ |
| 910 | _code \ |
| 911 | __event_len = __event_get_size__##_name(__dynamic_len, tp_locvar); \ |
| 912 | __event_align = __event_get_align__##_name(tp_locvar); \ |
| 913 | lib_ring_buffer_ctx_init(&__ctx, __chan->chan, __event, __event_len, \ |
| 914 | __event_align, -1); \ |
| 915 | __ret = __chan->ops->event_reserve(&__ctx, __event->id); \ |
| 916 | if (__ret < 0) \ |
| 917 | return; \ |
| 918 | /* Control code (field ordering) */ \ |
| 919 | _tstruct \ |
| 920 | __chan->ops->event_commit(&__ctx); \ |
| 921 | return; \ |
| 922 | /* Copy code, steered by control code */ \ |
| 923 | _assign \ |
| 924 | } |
| 925 | |
| 926 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| 927 | |
| 928 | /* |
| 929 | * Stage 10 of the trace events. |
| 930 | * |
| 931 | * Register/unregister probes at module load/unload. |
| 932 | */ |
| 933 | |
| 934 | #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */ |
| 935 | |
| 936 | #define TP_ID1(_token, _system) _token##_system |
| 937 | #define TP_ID(_token, _system) TP_ID1(_token, _system) |
| 938 | #define module_init_eval1(_token, _system) module_init(_token##_system) |
| 939 | #define module_init_eval(_token, _system) module_init_eval1(_token, _system) |
| 940 | #define module_exit_eval1(_token, _system) module_exit(_token##_system) |
| 941 | #define module_exit_eval(_token, _system) module_exit_eval1(_token, _system) |
| 942 | |
| 943 | #ifndef TP_MODULE_NOINIT |
| 944 | static int TP_ID(__lttng_events_init__, TRACE_SYSTEM)(void) |
| 945 | { |
| 946 | wrapper_vmalloc_sync_all(); |
| 947 | return lttng_probe_register(&TP_ID(__probe_desc___, TRACE_SYSTEM)); |
| 948 | } |
| 949 | |
| 950 | static void TP_ID(__lttng_events_exit__, TRACE_SYSTEM)(void) |
| 951 | { |
| 952 | lttng_probe_unregister(&TP_ID(__probe_desc___, TRACE_SYSTEM)); |
| 953 | } |
| 954 | |
| 955 | #ifndef TP_MODULE_NOAUTOLOAD |
| 956 | module_init_eval(__lttng_events_init__, TRACE_SYSTEM); |
| 957 | module_exit_eval(__lttng_events_exit__, TRACE_SYSTEM); |
| 958 | #endif |
| 959 | |
| 960 | #endif |
| 961 | |
| 962 | #undef module_init_eval |
| 963 | #undef module_exit_eval |
| 964 | #undef TP_ID1 |
| 965 | #undef TP_ID |
| 966 | |
| 967 | #undef TP_PROTO |
| 968 | #undef TP_ARGS |