| 1 | /* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only) |
| 2 | * |
| 3 | * lttng/tracepoint-event-impl.h |
| 4 | * |
| 5 | * Copyright (C) 2009 Steven Rostedt <rostedt@goodmis.org> |
| 6 | * Copyright (C) 2009-2014 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 7 | */ |
| 8 | |
| 9 | #include <linux/uaccess.h> |
| 10 | #include <linux/debugfs.h> |
| 11 | #include <linux/rculist.h> |
| 12 | #include <asm/byteorder.h> |
| 13 | #include <linux/swab.h> |
| 14 | |
| 15 | #include <wrapper/vmalloc.h> /* for wrapper_vmalloc_sync_mappings() */ |
| 16 | #include <ringbuffer/frontend_types.h> |
| 17 | #include <ringbuffer/backend.h> |
| 18 | #include <wrapper/rcu.h> |
| 19 | #include <wrapper/user_namespace.h> |
| 20 | #include <lttng/types.h> |
| 21 | #include <lttng/probe-user.h> |
| 22 | #include <lttng/events.h> |
| 23 | #include <lttng/tracer-core.h> |
| 24 | #include <lttng/tp-mempool.h> |
| 25 | |
| 26 | #define __LTTNG_NULL_STRING "(null)" |
| 27 | |
| 28 | #undef PARAMS |
| 29 | #define PARAMS(args...) args |
| 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, fields) \ |
| 41 | LTTNG_TRACEPOINT_EVENT_CLASS(map, \ |
| 42 | PARAMS(proto), \ |
| 43 | PARAMS(args), \ |
| 44 | PARAMS(fields)) \ |
| 45 | LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(map, name, map, PARAMS(proto), PARAMS(args)) |
| 46 | |
| 47 | #undef LTTNG_TRACEPOINT_EVENT_MAP_NOARGS |
| 48 | #define LTTNG_TRACEPOINT_EVENT_MAP_NOARGS(name, map, fields) \ |
| 49 | LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(map, \ |
| 50 | PARAMS(fields)) \ |
| 51 | LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(map, name, map) |
| 52 | |
| 53 | #undef LTTNG_TRACEPOINT_EVENT_CODE_MAP |
| 54 | #define LTTNG_TRACEPOINT_EVENT_CODE_MAP(name, map, proto, args, _locvar, _code_pre, fields, _code_post) \ |
| 55 | LTTNG_TRACEPOINT_EVENT_CLASS_CODE(map, \ |
| 56 | PARAMS(proto), \ |
| 57 | PARAMS(args), \ |
| 58 | PARAMS(_locvar), \ |
| 59 | PARAMS(_code_pre), \ |
| 60 | PARAMS(fields), \ |
| 61 | PARAMS(_code_post)) \ |
| 62 | LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(map, name, map, PARAMS(proto), PARAMS(args)) |
| 63 | |
| 64 | #undef LTTNG_TRACEPOINT_EVENT_CODE |
| 65 | #define LTTNG_TRACEPOINT_EVENT_CODE(name, proto, args, _locvar, _code_pre, fields, _code_post) \ |
| 66 | LTTNG_TRACEPOINT_EVENT_CODE_MAP(name, name, \ |
| 67 | PARAMS(proto), \ |
| 68 | PARAMS(args), \ |
| 69 | PARAMS(_locvar), \ |
| 70 | PARAMS(_code_pre), \ |
| 71 | PARAMS(fields), \ |
| 72 | PARAMS(_code_post)) |
| 73 | |
| 74 | /* |
| 75 | * LTTNG_TRACEPOINT_EVENT_CLASS can be used to add a generic function |
| 76 | * handlers for events. That is, if all events have the same parameters |
| 77 | * and just have distinct trace points. Each tracepoint can be defined |
| 78 | * with LTTNG_TRACEPOINT_EVENT_INSTANCE and that will map the |
| 79 | * LTTNG_TRACEPOINT_EVENT_CLASS to the tracepoint. |
| 80 | * |
| 81 | * LTTNG_TRACEPOINT_EVENT is a one to one mapping between tracepoint and |
| 82 | * template. |
| 83 | */ |
| 84 | |
| 85 | #undef LTTNG_TRACEPOINT_EVENT |
| 86 | #define LTTNG_TRACEPOINT_EVENT(name, proto, args, fields) \ |
| 87 | LTTNG_TRACEPOINT_EVENT_MAP(name, name, \ |
| 88 | PARAMS(proto), \ |
| 89 | PARAMS(args), \ |
| 90 | PARAMS(fields)) |
| 91 | |
| 92 | #undef LTTNG_TRACEPOINT_EVENT_NOARGS |
| 93 | #define LTTNG_TRACEPOINT_EVENT_NOARGS(name, fields) \ |
| 94 | LTTNG_TRACEPOINT_EVENT_MAP_NOARGS(name, name, PARAMS(fields)) |
| 95 | |
| 96 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE |
| 97 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE(template, name, proto, args) \ |
| 98 | LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(template, name, name, PARAMS(proto), PARAMS(args)) |
| 99 | |
| 100 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS |
| 101 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS(template, name) \ |
| 102 | LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(template, name, name) |
| 103 | |
| 104 | #undef LTTNG_TRACEPOINT_EVENT_CLASS |
| 105 | #define LTTNG_TRACEPOINT_EVENT_CLASS(_name, _proto, _args, _fields) \ |
| 106 | LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, PARAMS(_proto), PARAMS(_args), , , \ |
| 107 | PARAMS(_fields), ) |
| 108 | |
| 109 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS |
| 110 | #define LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(_name, _fields) \ |
| 111 | LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, , , PARAMS(_fields), ) |
| 112 | |
| 113 | |
| 114 | /* |
| 115 | * Stage 1 of the trace events. |
| 116 | * |
| 117 | * Create dummy trace calls for each events, verifying that the LTTng module |
| 118 | * instrumentation headers match the kernel arguments. Will be optimized |
| 119 | * out by the compiler. |
| 120 | */ |
| 121 | |
| 122 | /* Reset all macros within TRACEPOINT_EVENT */ |
| 123 | #include <lttng/events-reset.h> |
| 124 | |
| 125 | #undef TP_PROTO |
| 126 | #define TP_PROTO(...) __VA_ARGS__ |
| 127 | |
| 128 | #undef TP_ARGS |
| 129 | #define TP_ARGS(...) __VA_ARGS__ |
| 130 | |
| 131 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP |
| 132 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(_template, _name, _map, _proto, _args) \ |
| 133 | void trace_##_name(_proto); |
| 134 | |
| 135 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS |
| 136 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map) \ |
| 137 | void trace_##_name(void); |
| 138 | |
| 139 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| 140 | |
| 141 | /* |
| 142 | * Stage 1.1 of the trace events. |
| 143 | * |
| 144 | * Create dummy trace prototypes for each event class, and for each used |
| 145 | * template. This will allow checking whether the prototypes from the |
| 146 | * class and the instance using the class actually match. |
| 147 | */ |
| 148 | |
| 149 | #include <lttng/events-reset.h> /* Reset all macros within TRACE_EVENT */ |
| 150 | |
| 151 | #undef TP_PROTO |
| 152 | #define TP_PROTO(...) __VA_ARGS__ |
| 153 | |
| 154 | #undef TP_ARGS |
| 155 | #define TP_ARGS(...) __VA_ARGS__ |
| 156 | |
| 157 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP |
| 158 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(_template, _name, _map, _proto, _args) \ |
| 159 | void __event_template_proto___##_template(_proto); |
| 160 | |
| 161 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS |
| 162 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map) \ |
| 163 | void __event_template_proto___##_template(void); |
| 164 | |
| 165 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE |
| 166 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \ |
| 167 | void __event_template_proto___##_name(_proto); |
| 168 | |
| 169 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS |
| 170 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \ |
| 171 | void __event_template_proto___##_name(void); |
| 172 | |
| 173 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| 174 | |
| 175 | /* |
| 176 | * Stage 1.2 of tracepoint event generation |
| 177 | * |
| 178 | * Unfolding the enums |
| 179 | */ |
| 180 | #include <lttng/events-reset.h> /* Reset all macros within TRACE_EVENT */ |
| 181 | |
| 182 | /* Enumeration entry (single value) */ |
| 183 | #undef ctf_enum_value |
| 184 | #define ctf_enum_value(_string, _value) \ |
| 185 | lttng_kernel_static_enum_entry_value(_string, _value) |
| 186 | |
| 187 | /* Enumeration entry (range) */ |
| 188 | #undef ctf_enum_range |
| 189 | #define ctf_enum_range(_string, _range_start, _range_end) \ |
| 190 | lttng_kernel_static_enum_entry_range(_string, _range_start, _range_end) |
| 191 | |
| 192 | /* Enumeration entry (automatic value; follows the rules of CTF) */ |
| 193 | #undef ctf_enum_auto |
| 194 | #define ctf_enum_auto(_string) \ |
| 195 | lttng_kernel_static_enum_entry_auto(_string) |
| 196 | |
| 197 | #undef TP_ENUM_VALUES |
| 198 | #define TP_ENUM_VALUES(...) \ |
| 199 | __VA_ARGS__ |
| 200 | |
| 201 | #undef LTTNG_TRACEPOINT_ENUM |
| 202 | #define LTTNG_TRACEPOINT_ENUM(_name, _values) \ |
| 203 | static const struct lttng_kernel_enum_entry *__enum_values__##_name[] = { \ |
| 204 | _values \ |
| 205 | }; |
| 206 | |
| 207 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| 208 | |
| 209 | /* |
| 210 | * Stage 2 of the trace events. |
| 211 | * |
| 212 | * Create event field type metadata section. |
| 213 | * Each event produce an array of fields. |
| 214 | */ |
| 215 | |
| 216 | /* Reset all macros within TRACEPOINT_EVENT */ |
| 217 | #include <lttng/events-reset.h> |
| 218 | #include <lttng/events-write.h> |
| 219 | #include <lttng/events-nowrite.h> |
| 220 | |
| 221 | #undef _ctf_integer_ext |
| 222 | #define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _user, _nowrite) \ |
| 223 | lttng_kernel_static_event_field(#_item, \ |
| 224 | lttng_kernel_static_type_integer_from_type(_type, _byte_order, _base), \ |
| 225 | _nowrite, _user, 0), |
| 226 | |
| 227 | #undef _ctf_array_encoded |
| 228 | #define _ctf_array_encoded(_type, _item, _src, _length, \ |
| 229 | _encoding, _byte_order, _elem_type_base, _user, _nowrite) \ |
| 230 | lttng_kernel_static_event_field(#_item, \ |
| 231 | lttng_kernel_static_type_array(_length, \ |
| 232 | lttng_kernel_static_type_integer_from_type(_type, _byte_order, _elem_type_base), \ |
| 233 | 0, \ |
| 234 | _encoding), \ |
| 235 | _nowrite, _user, 0), |
| 236 | |
| 237 | #undef _ctf_array_bitfield |
| 238 | #define _ctf_array_bitfield(_type, _item, _src, _length, _user, _nowrite) \ |
| 239 | lttng_kernel_static_event_field(#_item, \ |
| 240 | lttng_kernel_static_type_array((_length) * sizeof(_type) * CHAR_BIT, \ |
| 241 | lttng_kernel_static_type_integer(1, 1, 0, __LITTLE_ENDIAN, 10), \ |
| 242 | lttng_alignof(_type), \ |
| 243 | none), \ |
| 244 | _nowrite, _user, 0), |
| 245 | |
| 246 | #undef _ctf_sequence_encoded |
| 247 | #define _ctf_sequence_encoded(_type, _item, _src, \ |
| 248 | _length_type, _src_length, _encoding, \ |
| 249 | _byte_order, _elem_type_base, _user, _nowrite) \ |
| 250 | lttng_kernel_static_event_field("_" #_item "_length", \ |
| 251 | lttng_kernel_static_type_integer_from_type(_length_type, __BYTE_ORDER, 10), \ |
| 252 | _nowrite, 0, 1), \ |
| 253 | lttng_kernel_static_event_field(#_item, \ |
| 254 | lttng_kernel_static_type_sequence(NULL, /* Use previous field. */ \ |
| 255 | lttng_kernel_static_type_integer_from_type(_type, _byte_order, _elem_type_base), \ |
| 256 | 0, \ |
| 257 | _encoding), \ |
| 258 | _nowrite, _user, 0), |
| 259 | |
| 260 | #undef _ctf_sequence_bitfield |
| 261 | #define _ctf_sequence_bitfield(_type, _item, _src, \ |
| 262 | _length_type, _src_length, \ |
| 263 | _user, _nowrite) \ |
| 264 | lttng_kernel_static_event_field("_" #_item "_length", \ |
| 265 | lttng_kernel_static_type_integer_from_type(_length_type, __BYTE_ORDER, 10), \ |
| 266 | _nowrite, 0, 1), \ |
| 267 | lttng_kernel_static_event_field(#_item, \ |
| 268 | lttng_kernel_static_type_sequence(NULL, /* Use previous field. */ \ |
| 269 | lttng_kernel_static_type_integer(1, 1, 0, __LITTLE_ENDIAN, 10), \ |
| 270 | lttng_alignof(_type), \ |
| 271 | none), \ |
| 272 | _nowrite, _user, 0), |
| 273 | |
| 274 | #undef _ctf_string |
| 275 | #define _ctf_string(_item, _src, _user, _nowrite) \ |
| 276 | lttng_kernel_static_event_field(#_item, \ |
| 277 | lttng_kernel_static_type_string(UTF8), \ |
| 278 | _nowrite, _user, 0), |
| 279 | |
| 280 | #undef _ctf_unused |
| 281 | #define _ctf_unused(_src) |
| 282 | |
| 283 | #undef _ctf_enum |
| 284 | #define _ctf_enum(_name, _type, _item, _src, _user, _nowrite) \ |
| 285 | lttng_kernel_static_event_field(#_item, \ |
| 286 | lttng_kernel_static_type_enum(&__enum_##_name, \ |
| 287 | lttng_kernel_static_type_integer_from_type(_type, __BYTE_ORDER, 10)), \ |
| 288 | _nowrite, _user, 0), |
| 289 | |
| 290 | #undef ctf_custom_field |
| 291 | #define ctf_custom_field(_type, _item, _code) \ |
| 292 | lttng_kernel_static_event_field(#_item, PARAMS(_type), 0, 0, 1), |
| 293 | |
| 294 | #undef ctf_custom_type |
| 295 | #define ctf_custom_type(...) __VA_ARGS__ |
| 296 | |
| 297 | #undef TP_FIELDS |
| 298 | #define TP_FIELDS(...) __VA_ARGS__ /* Only one used in this phase */ |
| 299 | |
| 300 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS |
| 301 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \ |
| 302 | static const struct lttng_kernel_event_field *__event_fields___##_name[] = { \ |
| 303 | _fields \ |
| 304 | }; |
| 305 | |
| 306 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE |
| 307 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \ |
| 308 | LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, PARAMS(_fields), _code_post) |
| 309 | |
| 310 | #undef LTTNG_TRACEPOINT_ENUM |
| 311 | #define LTTNG_TRACEPOINT_ENUM(_name, _values) \ |
| 312 | static const struct lttng_kernel_enum_desc __enum_##_name = { \ |
| 313 | .name = #_name, \ |
| 314 | .entries = __enum_values__##_name, \ |
| 315 | .nr_entries = ARRAY_SIZE(__enum_values__##_name), \ |
| 316 | }; |
| 317 | |
| 318 | #define LTTNG_CREATE_FIELD_METADATA |
| 319 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| 320 | #undef LTTNG_CREATE_FIELD_METADATA |
| 321 | |
| 322 | /* |
| 323 | * Stage 3 of the trace events. |
| 324 | * |
| 325 | * Create probe callback prototypes. |
| 326 | */ |
| 327 | |
| 328 | /* Reset all macros within TRACEPOINT_EVENT */ |
| 329 | #include <lttng/events-reset.h> |
| 330 | |
| 331 | #undef TP_PROTO |
| 332 | #define TP_PROTO(...) __VA_ARGS__ |
| 333 | |
| 334 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE |
| 335 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \ |
| 336 | static void __event_probe__##_name(void *__data, _proto); |
| 337 | |
| 338 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS |
| 339 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \ |
| 340 | static void __event_probe__##_name(void *__data); |
| 341 | |
| 342 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| 343 | |
| 344 | /* |
| 345 | * Stage 4 of the trace events. |
| 346 | * |
| 347 | * Create static inline function that calculates event size. |
| 348 | */ |
| 349 | |
| 350 | /* Reset all macros within TRACEPOINT_EVENT */ |
| 351 | #include <lttng/events-reset.h> |
| 352 | #include <lttng/events-write.h> |
| 353 | |
| 354 | #undef _ctf_integer_ext |
| 355 | #define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _user, _nowrite) \ |
| 356 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ |
| 357 | __event_len += sizeof(_type); |
| 358 | |
| 359 | #undef _ctf_array_encoded |
| 360 | #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _byte_order, _base, _user, _nowrite) \ |
| 361 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ |
| 362 | __event_len += sizeof(_type) * (_length); |
| 363 | |
| 364 | #undef _ctf_array_bitfield |
| 365 | #define _ctf_array_bitfield(_type, _item, _src, _length, _user, _nowrite) \ |
| 366 | _ctf_array_encoded(_type, _item, _src, _length, none, __LITTLE_ENDIAN, 0, _user, _nowrite) |
| 367 | |
| 368 | #undef _ctf_sequence_encoded |
| 369 | #define _ctf_sequence_encoded(_type, _item, _src, _length_type, \ |
| 370 | _src_length, _encoding, _byte_order, _base, _user, _nowrite) \ |
| 371 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_length_type)); \ |
| 372 | __event_len += sizeof(_length_type); \ |
| 373 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ |
| 374 | { \ |
| 375 | size_t __seqlen = (_src_length); \ |
| 376 | \ |
| 377 | if (unlikely(++this_cpu_ptr(<tng_dynamic_len_stack)->offset >= LTTNG_DYNAMIC_LEN_STACK_SIZE)) \ |
| 378 | goto error; \ |
| 379 | barrier(); /* reserve before use. */ \ |
| 380 | this_cpu_ptr(<tng_dynamic_len_stack)->stack[this_cpu_ptr(<tng_dynamic_len_stack)->offset - 1] = __seqlen; \ |
| 381 | __event_len += sizeof(_type) * __seqlen; \ |
| 382 | } |
| 383 | |
| 384 | #undef _ctf_sequence_bitfield |
| 385 | #define _ctf_sequence_bitfield(_type, _item, _src, \ |
| 386 | _length_type, _src_length, \ |
| 387 | _user, _nowrite) \ |
| 388 | _ctf_sequence_encoded(_type, _item, _src, _length_type, _src_length, \ |
| 389 | none, __LITTLE_ENDIAN, 10, _user, _nowrite) |
| 390 | |
| 391 | /* |
| 392 | * ctf_user_string includes \0. If returns 0, it faulted, so we set size to |
| 393 | * 1 (\0 only). |
| 394 | */ |
| 395 | #undef _ctf_string |
| 396 | #define _ctf_string(_item, _src, _user, _nowrite) \ |
| 397 | if (unlikely(++this_cpu_ptr(<tng_dynamic_len_stack)->offset >= LTTNG_DYNAMIC_LEN_STACK_SIZE)) \ |
| 398 | goto error; \ |
| 399 | barrier(); /* reserve before use. */ \ |
| 400 | if (_user) { \ |
| 401 | __event_len += this_cpu_ptr(<tng_dynamic_len_stack)->stack[this_cpu_ptr(<tng_dynamic_len_stack)->offset - 1] = \ |
| 402 | max_t(size_t, lttng_strlen_user_inatomic(_src), 1); \ |
| 403 | } else { \ |
| 404 | __event_len += this_cpu_ptr(<tng_dynamic_len_stack)->stack[this_cpu_ptr(<tng_dynamic_len_stack)->offset - 1] = \ |
| 405 | strlen((_src) ? (_src) : __LTTNG_NULL_STRING) + 1; \ |
| 406 | } |
| 407 | |
| 408 | #undef _ctf_enum |
| 409 | #define _ctf_enum(_name, _type, _item, _src, _user, _nowrite) \ |
| 410 | _ctf_integer_ext(_type, _item, _src, __BYTE_ORDER, 10, _user, _nowrite) |
| 411 | |
| 412 | #undef ctf_align |
| 413 | #define ctf_align(_type) \ |
| 414 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); |
| 415 | |
| 416 | #undef ctf_custom_field |
| 417 | #define ctf_custom_field(_type, _item, _code) \ |
| 418 | { \ |
| 419 | _code \ |
| 420 | } |
| 421 | |
| 422 | #undef ctf_custom_code |
| 423 | #define ctf_custom_code(...) __VA_ARGS__ |
| 424 | |
| 425 | #undef TP_PROTO |
| 426 | #define TP_PROTO(...) __VA_ARGS__ |
| 427 | |
| 428 | #undef TP_FIELDS |
| 429 | #define TP_FIELDS(...) __VA_ARGS__ |
| 430 | |
| 431 | #undef TP_locvar |
| 432 | #define TP_locvar(...) __VA_ARGS__ |
| 433 | |
| 434 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE |
| 435 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \ |
| 436 | static inline ssize_t __event_get_size__##_name(void *__tp_locvar, _proto) \ |
| 437 | { \ |
| 438 | size_t __event_len = 0; \ |
| 439 | unsigned int __dynamic_len_idx __attribute__((unused)) = 0; \ |
| 440 | struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \ |
| 441 | \ |
| 442 | _fields \ |
| 443 | return __event_len; \ |
| 444 | \ |
| 445 | error: \ |
| 446 | __attribute__((unused)); \ |
| 447 | return -1; \ |
| 448 | } |
| 449 | |
| 450 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS |
| 451 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \ |
| 452 | static inline ssize_t __event_get_size__##_name(void *__tp_locvar) \ |
| 453 | { \ |
| 454 | size_t __event_len = 0; \ |
| 455 | unsigned int __dynamic_len_idx __attribute__((unused)) = 0; \ |
| 456 | struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \ |
| 457 | \ |
| 458 | _fields \ |
| 459 | return __event_len; \ |
| 460 | \ |
| 461 | error: \ |
| 462 | __attribute__((unused)); \ |
| 463 | return -1; \ |
| 464 | } |
| 465 | |
| 466 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| 467 | |
| 468 | |
| 469 | /* |
| 470 | * Stage 4.1 of tracepoint event generation. |
| 471 | * |
| 472 | * Create static inline function that layout the filter stack data. |
| 473 | * We make both write and nowrite data available to the filter. |
| 474 | */ |
| 475 | |
| 476 | /* Reset all macros within TRACEPOINT_EVENT */ |
| 477 | #include <lttng/events-reset.h> |
| 478 | #include <lttng/events-write.h> |
| 479 | #include <lttng/events-nowrite.h> |
| 480 | |
| 481 | #undef _ctf_integer_ext_fetched |
| 482 | #define _ctf_integer_ext_fetched(_type, _item, _src, _byte_order, _base, _nowrite) \ |
| 483 | if (lttng_is_signed_type(_type)) { \ |
| 484 | int64_t __ctf_tmp_int64; \ |
| 485 | switch (sizeof(_type)) { \ |
| 486 | case 1: \ |
| 487 | { \ |
| 488 | union { _type t; int8_t v; } __tmp = { (_type) (_src) }; \ |
| 489 | __ctf_tmp_int64 = (int64_t) __tmp.v; \ |
| 490 | break; \ |
| 491 | } \ |
| 492 | case 2: \ |
| 493 | { \ |
| 494 | union { _type t; int16_t v; } __tmp = { (_type) (_src) }; \ |
| 495 | if (_byte_order != __BYTE_ORDER) \ |
| 496 | __swab16s(&__tmp.v); \ |
| 497 | __ctf_tmp_int64 = (int64_t) __tmp.v; \ |
| 498 | break; \ |
| 499 | } \ |
| 500 | case 4: \ |
| 501 | { \ |
| 502 | union { _type t; int32_t v; } __tmp = { (_type) (_src) }; \ |
| 503 | if (_byte_order != __BYTE_ORDER) \ |
| 504 | __swab32s(&__tmp.v); \ |
| 505 | __ctf_tmp_int64 = (int64_t) __tmp.v; \ |
| 506 | break; \ |
| 507 | } \ |
| 508 | case 8: \ |
| 509 | { \ |
| 510 | union { _type t; int64_t v; } __tmp = { (_type) (_src) }; \ |
| 511 | if (_byte_order != __BYTE_ORDER) \ |
| 512 | __swab64s(&__tmp.v); \ |
| 513 | __ctf_tmp_int64 = (int64_t) __tmp.v; \ |
| 514 | break; \ |
| 515 | } \ |
| 516 | default: \ |
| 517 | BUG_ON(1); \ |
| 518 | }; \ |
| 519 | memcpy(__stack_data, &__ctf_tmp_int64, sizeof(int64_t)); \ |
| 520 | } else { \ |
| 521 | uint64_t __ctf_tmp_uint64; \ |
| 522 | switch (sizeof(_type)) { \ |
| 523 | case 1: \ |
| 524 | { \ |
| 525 | union { _type t; uint8_t v; } __tmp = { (_type) (_src) }; \ |
| 526 | __ctf_tmp_uint64 = (uint64_t) __tmp.v; \ |
| 527 | break; \ |
| 528 | } \ |
| 529 | case 2: \ |
| 530 | { \ |
| 531 | union { _type t; uint16_t v; } __tmp = { (_type) (_src) }; \ |
| 532 | if (_byte_order != __BYTE_ORDER) \ |
| 533 | __swab16s(&__tmp.v); \ |
| 534 | __ctf_tmp_uint64 = (uint64_t) __tmp.v; \ |
| 535 | break; \ |
| 536 | } \ |
| 537 | case 4: \ |
| 538 | { \ |
| 539 | union { _type t; uint32_t v; } __tmp = { (_type) (_src) }; \ |
| 540 | if (_byte_order != __BYTE_ORDER) \ |
| 541 | __swab32s(&__tmp.v); \ |
| 542 | __ctf_tmp_uint64 = (uint64_t) __tmp.v; \ |
| 543 | break; \ |
| 544 | } \ |
| 545 | case 8: \ |
| 546 | { \ |
| 547 | union { _type t; uint64_t v; } __tmp = { (_type) (_src) }; \ |
| 548 | if (_byte_order != __BYTE_ORDER) \ |
| 549 | __swab64s(&__tmp.v); \ |
| 550 | __ctf_tmp_uint64 = (uint64_t) __tmp.v; \ |
| 551 | break; \ |
| 552 | } \ |
| 553 | default: \ |
| 554 | BUG_ON(1); \ |
| 555 | }; \ |
| 556 | memcpy(__stack_data, &__ctf_tmp_uint64, sizeof(uint64_t)); \ |
| 557 | } \ |
| 558 | __stack_data += sizeof(int64_t); |
| 559 | |
| 560 | #undef _ctf_integer_ext_isuser0 |
| 561 | #define _ctf_integer_ext_isuser0(_type, _item, _src, _byte_order, _base, _nowrite) \ |
| 562 | _ctf_integer_ext_fetched(_type, _item, _src, _byte_order, _base, _nowrite) |
| 563 | |
| 564 | #undef _ctf_integer_ext_isuser1 |
| 565 | #define _ctf_integer_ext_isuser1(_type, _item, _user_src, _byte_order, _base, _nowrite) \ |
| 566 | { \ |
| 567 | union { \ |
| 568 | char __array[sizeof(_user_src)]; \ |
| 569 | __typeof__(_user_src) __v; \ |
| 570 | } __tmp_fetch; \ |
| 571 | if (lib_ring_buffer_copy_from_user_check_nofault(__tmp_fetch.__array, \ |
| 572 | &(_user_src), sizeof(_user_src))) \ |
| 573 | memset(__tmp_fetch.__array, 0, sizeof(__tmp_fetch.__array)); \ |
| 574 | _ctf_integer_ext_fetched(_type, _item, __tmp_fetch.__v, _byte_order, _base, _nowrite) \ |
| 575 | } |
| 576 | |
| 577 | #undef _ctf_integer_ext |
| 578 | #define _ctf_integer_ext(_type, _item, _user_src, _byte_order, _base, _user, _nowrite) \ |
| 579 | _ctf_integer_ext_isuser##_user(_type, _item, _user_src, _byte_order, _base, _nowrite) |
| 580 | |
| 581 | #undef _ctf_array_encoded |
| 582 | #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _byte_order, _base, _user, _nowrite) \ |
| 583 | { \ |
| 584 | unsigned long __ctf_tmp_ulong = (unsigned long) (_length); \ |
| 585 | const void *__ctf_tmp_ptr = (_src); \ |
| 586 | memcpy(__stack_data, &__ctf_tmp_ulong, sizeof(unsigned long)); \ |
| 587 | __stack_data += sizeof(unsigned long); \ |
| 588 | memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void *)); \ |
| 589 | __stack_data += sizeof(void *); \ |
| 590 | } |
| 591 | |
| 592 | #undef _ctf_array_bitfield |
| 593 | #define _ctf_array_bitfield(_type, _item, _src, _length, _user, _nowrite) \ |
| 594 | _ctf_array_encoded(_type, _item, _src, _length, none, __LITTLE_ENDIAN, 0, _user, _nowrite) |
| 595 | |
| 596 | #undef _ctf_sequence_encoded |
| 597 | #define _ctf_sequence_encoded(_type, _item, _src, _length_type, \ |
| 598 | _src_length, _encoding, _byte_order, _base, _user, _nowrite) \ |
| 599 | { \ |
| 600 | unsigned long __ctf_tmp_ulong = (unsigned long) (_src_length); \ |
| 601 | const void *__ctf_tmp_ptr = (_src); \ |
| 602 | memcpy(__stack_data, &__ctf_tmp_ulong, sizeof(unsigned long)); \ |
| 603 | __stack_data += sizeof(unsigned long); \ |
| 604 | memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void *)); \ |
| 605 | __stack_data += sizeof(void *); \ |
| 606 | } |
| 607 | |
| 608 | #undef _ctf_sequence_bitfield |
| 609 | #define _ctf_sequence_bitfield(_type, _item, _src, \ |
| 610 | _length_type, _src_length, \ |
| 611 | _user, _nowrite) \ |
| 612 | _ctf_sequence_encoded(_type, _item, _src, _length_type, _src_length, \ |
| 613 | none, __LITTLE_ENDIAN, 10, _user, _nowrite) |
| 614 | |
| 615 | #undef _ctf_string |
| 616 | #define _ctf_string(_item, _src, _user, _nowrite) \ |
| 617 | { \ |
| 618 | const void *__ctf_tmp_ptr = \ |
| 619 | ((_src) ? (_src) : __LTTNG_NULL_STRING); \ |
| 620 | memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void *)); \ |
| 621 | __stack_data += sizeof(void *); \ |
| 622 | } |
| 623 | |
| 624 | #undef _ctf_enum |
| 625 | #define _ctf_enum(_name, _type, _item, _src, _user, _nowrite) \ |
| 626 | _ctf_integer_ext(_type, _item, _src, __BYTE_ORDER, 10, _user, _nowrite) |
| 627 | |
| 628 | #undef TP_PROTO |
| 629 | #define TP_PROTO(...) __VA_ARGS__ |
| 630 | |
| 631 | #undef TP_FIELDS |
| 632 | #define TP_FIELDS(...) __VA_ARGS__ |
| 633 | |
| 634 | #undef TP_locvar |
| 635 | #define TP_locvar(...) __VA_ARGS__ |
| 636 | |
| 637 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS |
| 638 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \ |
| 639 | static inline \ |
| 640 | void __event_prepare_interpreter_stack__##_name(char *__stack_data, \ |
| 641 | void *__tp_locvar) \ |
| 642 | { \ |
| 643 | struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \ |
| 644 | \ |
| 645 | _fields \ |
| 646 | } |
| 647 | |
| 648 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE |
| 649 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \ |
| 650 | static inline \ |
| 651 | void __event_prepare_interpreter_stack__##_name(char *__stack_data, \ |
| 652 | void *__tp_locvar, _proto) \ |
| 653 | { \ |
| 654 | struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \ |
| 655 | \ |
| 656 | _fields \ |
| 657 | } |
| 658 | |
| 659 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| 660 | |
| 661 | /* |
| 662 | * Stage 5 of the trace events. |
| 663 | * |
| 664 | * Create static inline function that calculates event payload alignment. |
| 665 | */ |
| 666 | |
| 667 | /* Reset all macros within TRACEPOINT_EVENT */ |
| 668 | #include <lttng/events-reset.h> |
| 669 | #include <lttng/events-write.h> |
| 670 | |
| 671 | #undef _ctf_integer_ext |
| 672 | #define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _user, _nowrite) \ |
| 673 | __event_align = max_t(size_t, __event_align, lttng_alignof(_type)); |
| 674 | |
| 675 | #undef _ctf_array_encoded |
| 676 | #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _byte_order, _base, _user, _nowrite) \ |
| 677 | __event_align = max_t(size_t, __event_align, lttng_alignof(_type)); |
| 678 | |
| 679 | #undef _ctf_array_bitfield |
| 680 | #define _ctf_array_bitfield(_type, _item, _src, _length, _user, _nowrite) \ |
| 681 | _ctf_array_encoded(_type, _item, _src, _length, none, __LITTLE_ENDIAN, 0, _user, _nowrite) |
| 682 | |
| 683 | #undef _ctf_sequence_encoded |
| 684 | #define _ctf_sequence_encoded(_type, _item, _src, _length_type, \ |
| 685 | _src_length, _encoding, _byte_order, _base, _user, _nowrite) \ |
| 686 | __event_align = max_t(size_t, __event_align, lttng_alignof(_length_type)); \ |
| 687 | __event_align = max_t(size_t, __event_align, lttng_alignof(_type)); |
| 688 | |
| 689 | #undef _ctf_sequence_bitfield |
| 690 | #define _ctf_sequence_bitfield(_type, _item, _src, \ |
| 691 | _length_type, _src_length, \ |
| 692 | _user, _nowrite) \ |
| 693 | _ctf_sequence_encoded(_type, _item, _src, _length_type, _src_length, \ |
| 694 | none, __LITTLE_ENDIAN, 10, _user, _nowrite) |
| 695 | |
| 696 | #undef _ctf_string |
| 697 | #define _ctf_string(_item, _src, _user, _nowrite) |
| 698 | |
| 699 | #undef _ctf_enum |
| 700 | #define _ctf_enum(_name, _type, _item, _src, _user, _nowrite) \ |
| 701 | _ctf_integer_ext(_type, _item, _src, __BYTE_ORDER, 10, _user, _nowrite) |
| 702 | |
| 703 | #undef ctf_align |
| 704 | #define ctf_align(_type) \ |
| 705 | __event_align = max_t(size_t, __event_align, lttng_alignof(_type)); |
| 706 | |
| 707 | #undef TP_PROTO |
| 708 | #define TP_PROTO(...) __VA_ARGS__ |
| 709 | |
| 710 | #undef TP_FIELDS |
| 711 | #define TP_FIELDS(...) __VA_ARGS__ |
| 712 | |
| 713 | #undef TP_locvar |
| 714 | #define TP_locvar(...) __VA_ARGS__ |
| 715 | |
| 716 | #undef ctf_custom_field |
| 717 | #define ctf_custom_field(_type, _item, _code) _code |
| 718 | |
| 719 | #undef ctf_custom_code |
| 720 | #define ctf_custom_code(...) \ |
| 721 | { \ |
| 722 | __VA_ARGS__ \ |
| 723 | } |
| 724 | |
| 725 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE |
| 726 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \ |
| 727 | static inline size_t __event_get_align__##_name(void *__tp_locvar, _proto) \ |
| 728 | { \ |
| 729 | size_t __event_align = 1; \ |
| 730 | struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \ |
| 731 | \ |
| 732 | _fields \ |
| 733 | return __event_align; \ |
| 734 | } |
| 735 | |
| 736 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS |
| 737 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \ |
| 738 | static inline size_t __event_get_align__##_name(void *__tp_locvar) \ |
| 739 | { \ |
| 740 | size_t __event_align = 1; \ |
| 741 | struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \ |
| 742 | \ |
| 743 | _fields \ |
| 744 | return __event_align; \ |
| 745 | } |
| 746 | |
| 747 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| 748 | |
| 749 | /* |
| 750 | * Stage 6 of tracepoint event generation. |
| 751 | * |
| 752 | * Create the probe function. This function calls event size calculation |
| 753 | * and writes event data into the buffer. |
| 754 | */ |
| 755 | |
| 756 | /* Reset all macros within TRACEPOINT_EVENT */ |
| 757 | #include <lttng/events-reset.h> |
| 758 | #include <lttng/events-write.h> |
| 759 | |
| 760 | #undef _ctf_integer_ext_fetched |
| 761 | #define _ctf_integer_ext_fetched(_type, _item, _src, _byte_order, _base, _nowrite) \ |
| 762 | { \ |
| 763 | _type __tmp = _src; \ |
| 764 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__tmp));\ |
| 765 | __chan->ops->event_write(&__ctx, &__tmp, sizeof(__tmp));\ |
| 766 | } |
| 767 | |
| 768 | #undef _ctf_integer_ext_isuser0 |
| 769 | #define _ctf_integer_ext_isuser0(_type, _item, _src, _byte_order, _base, _nowrite) \ |
| 770 | _ctf_integer_ext_fetched(_type, _item, _src, _byte_order, _base, _nowrite) |
| 771 | |
| 772 | #undef _ctf_integer_ext_isuser1 |
| 773 | #define _ctf_integer_ext_isuser1(_type, _item, _user_src, _byte_order, _base, _nowrite) \ |
| 774 | { \ |
| 775 | union { \ |
| 776 | char __array[sizeof(_user_src)]; \ |
| 777 | __typeof__(_user_src) __v; \ |
| 778 | } __tmp_fetch; \ |
| 779 | if (lib_ring_buffer_copy_from_user_check_nofault(__tmp_fetch.__array, \ |
| 780 | &(_user_src), sizeof(_user_src))) \ |
| 781 | memset(__tmp_fetch.__array, 0, sizeof(__tmp_fetch.__array)); \ |
| 782 | _ctf_integer_ext_fetched(_type, _item, __tmp_fetch.__v, _byte_order, _base, _nowrite) \ |
| 783 | } |
| 784 | |
| 785 | #undef _ctf_integer_ext |
| 786 | #define _ctf_integer_ext(_type, _item, _user_src, _byte_order, _base, _user, _nowrite) \ |
| 787 | _ctf_integer_ext_isuser##_user(_type, _item, _user_src, _byte_order, _base, _nowrite) |
| 788 | |
| 789 | #undef _ctf_array_encoded |
| 790 | #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _byte_order, _base, _user, _nowrite) \ |
| 791 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \ |
| 792 | if (_user) { \ |
| 793 | __chan->ops->event_write_from_user(&__ctx, _src, sizeof(_type) * (_length)); \ |
| 794 | } else { \ |
| 795 | __chan->ops->event_write(&__ctx, _src, sizeof(_type) * (_length)); \ |
| 796 | } |
| 797 | |
| 798 | #if (__BYTE_ORDER == __LITTLE_ENDIAN) |
| 799 | #undef _ctf_array_bitfield |
| 800 | #define _ctf_array_bitfield(_type, _item, _src, _length, _user, _nowrite) \ |
| 801 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \ |
| 802 | if (_user) { \ |
| 803 | __chan->ops->event_write_from_user(&__ctx, _src, sizeof(_type) * (_length)); \ |
| 804 | } else { \ |
| 805 | __chan->ops->event_write(&__ctx, _src, sizeof(_type) * (_length)); \ |
| 806 | } |
| 807 | #else /* #if (__BYTE_ORDER == __LITTLE_ENDIAN) */ |
| 808 | /* |
| 809 | * For big endian, we need to byteswap into little endian. |
| 810 | */ |
| 811 | #undef _ctf_array_bitfield |
| 812 | #define _ctf_array_bitfield(_type, _item, _src, _length, _user, _nowrite) \ |
| 813 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \ |
| 814 | { \ |
| 815 | size_t _i; \ |
| 816 | \ |
| 817 | for (_i = 0; _i < (_length); _i++) { \ |
| 818 | _type _tmp; \ |
| 819 | \ |
| 820 | if (_user) { \ |
| 821 | if (get_user(_tmp, (_type *) _src + _i)) \ |
| 822 | _tmp = 0; \ |
| 823 | } else { \ |
| 824 | _tmp = ((_type *) _src)[_i]; \ |
| 825 | } \ |
| 826 | switch (sizeof(_type)) { \ |
| 827 | case 1: \ |
| 828 | break; \ |
| 829 | case 2: \ |
| 830 | _tmp = cpu_to_le16(_tmp); \ |
| 831 | break; \ |
| 832 | case 4: \ |
| 833 | _tmp = cpu_to_le32(_tmp); \ |
| 834 | break; \ |
| 835 | case 8: \ |
| 836 | _tmp = cpu_to_le64(_tmp); \ |
| 837 | break; \ |
| 838 | default: \ |
| 839 | BUG_ON(1); \ |
| 840 | } \ |
| 841 | __chan->ops->event_write(&__ctx, &_tmp, sizeof(_type)); \ |
| 842 | } \ |
| 843 | } |
| 844 | #endif /* #else #if (__BYTE_ORDER == __LITTLE_ENDIAN) */ |
| 845 | |
| 846 | #undef _ctf_sequence_encoded |
| 847 | #define _ctf_sequence_encoded(_type, _item, _src, _length_type, \ |
| 848 | _src_length, _encoding, _byte_order, _base, _user, _nowrite) \ |
| 849 | { \ |
| 850 | _length_type __tmpl = this_cpu_ptr(<tng_dynamic_len_stack)->stack[__dynamic_len_idx]; \ |
| 851 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_length_type));\ |
| 852 | __chan->ops->event_write(&__ctx, &__tmpl, sizeof(_length_type));\ |
| 853 | } \ |
| 854 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \ |
| 855 | if (_user) { \ |
| 856 | __chan->ops->event_write_from_user(&__ctx, _src, \ |
| 857 | sizeof(_type) * __get_dynamic_len(dest)); \ |
| 858 | } else { \ |
| 859 | __chan->ops->event_write(&__ctx, _src, \ |
| 860 | sizeof(_type) * __get_dynamic_len(dest)); \ |
| 861 | } |
| 862 | |
| 863 | #if (__BYTE_ORDER == __LITTLE_ENDIAN) |
| 864 | #undef _ctf_sequence_bitfield |
| 865 | #define _ctf_sequence_bitfield(_type, _item, _src, \ |
| 866 | _length_type, _src_length, \ |
| 867 | _user, _nowrite) \ |
| 868 | { \ |
| 869 | _length_type __tmpl = this_cpu_ptr(<tng_dynamic_len_stack)->stack[__dynamic_len_idx] * sizeof(_type) * CHAR_BIT; \ |
| 870 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_length_type));\ |
| 871 | __chan->ops->event_write(&__ctx, &__tmpl, sizeof(_length_type));\ |
| 872 | } \ |
| 873 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \ |
| 874 | if (_user) { \ |
| 875 | __chan->ops->event_write_from_user(&__ctx, _src, \ |
| 876 | sizeof(_type) * __get_dynamic_len(dest)); \ |
| 877 | } else { \ |
| 878 | __chan->ops->event_write(&__ctx, _src, \ |
| 879 | sizeof(_type) * __get_dynamic_len(dest)); \ |
| 880 | } |
| 881 | #else /* #if (__BYTE_ORDER == __LITTLE_ENDIAN) */ |
| 882 | /* |
| 883 | * For big endian, we need to byteswap into little endian. |
| 884 | */ |
| 885 | #undef _ctf_sequence_bitfield |
| 886 | #define _ctf_sequence_bitfield(_type, _item, _src, \ |
| 887 | _length_type, _src_length, \ |
| 888 | _user, _nowrite) \ |
| 889 | { \ |
| 890 | _length_type __tmpl = this_cpu_ptr(<tng_dynamic_len_stack)->stack[__dynamic_len_idx] * sizeof(_type) * CHAR_BIT; \ |
| 891 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_length_type));\ |
| 892 | __chan->ops->event_write(&__ctx, &__tmpl, sizeof(_length_type));\ |
| 893 | } \ |
| 894 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \ |
| 895 | { \ |
| 896 | size_t _i, _length; \ |
| 897 | \ |
| 898 | _length = __get_dynamic_len(dest); \ |
| 899 | for (_i = 0; _i < _length; _i++) { \ |
| 900 | _type _tmp; \ |
| 901 | \ |
| 902 | if (_user) { \ |
| 903 | if (get_user(_tmp, (_type *) _src + _i)) \ |
| 904 | _tmp = 0; \ |
| 905 | } else { \ |
| 906 | _tmp = ((_type *) _src)[_i]; \ |
| 907 | } \ |
| 908 | switch (sizeof(_type)) { \ |
| 909 | case 1: \ |
| 910 | break; \ |
| 911 | case 2: \ |
| 912 | _tmp = cpu_to_le16(_tmp); \ |
| 913 | break; \ |
| 914 | case 4: \ |
| 915 | _tmp = cpu_to_le32(_tmp); \ |
| 916 | break; \ |
| 917 | case 8: \ |
| 918 | _tmp = cpu_to_le64(_tmp); \ |
| 919 | break; \ |
| 920 | default: \ |
| 921 | BUG_ON(1); \ |
| 922 | } \ |
| 923 | __chan->ops->event_write(&__ctx, &_tmp, sizeof(_type)); \ |
| 924 | } \ |
| 925 | } |
| 926 | #endif /* #else #if (__BYTE_ORDER == __LITTLE_ENDIAN) */ |
| 927 | |
| 928 | #undef _ctf_string |
| 929 | #define _ctf_string(_item, _src, _user, _nowrite) \ |
| 930 | if (_user) { \ |
| 931 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(*(_src))); \ |
| 932 | __chan->ops->event_strcpy_from_user(&__ctx, _src, \ |
| 933 | __get_dynamic_len(dest)); \ |
| 934 | } else { \ |
| 935 | const char *__ctf_tmp_string = \ |
| 936 | ((_src) ? (_src) : __LTTNG_NULL_STRING); \ |
| 937 | lib_ring_buffer_align_ctx(&__ctx, \ |
| 938 | lttng_alignof(*__ctf_tmp_string)); \ |
| 939 | __chan->ops->event_strcpy(&__ctx, __ctf_tmp_string, \ |
| 940 | __get_dynamic_len(dest)); \ |
| 941 | } |
| 942 | |
| 943 | #undef _ctf_enum |
| 944 | #define _ctf_enum(_name, _type, _item, _src, _user, _nowrite) \ |
| 945 | _ctf_integer_ext(_type, _item, _src, __BYTE_ORDER, 10, _user, _nowrite) |
| 946 | |
| 947 | #undef ctf_align |
| 948 | #define ctf_align(_type) \ |
| 949 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); |
| 950 | |
| 951 | #undef ctf_custom_field |
| 952 | #define ctf_custom_field(_type, _item, _code) _code |
| 953 | |
| 954 | #undef ctf_custom_code |
| 955 | #define ctf_custom_code(...) \ |
| 956 | { \ |
| 957 | __VA_ARGS__ \ |
| 958 | } |
| 959 | |
| 960 | /* Beware: this get len actually consumes the len value */ |
| 961 | #undef __get_dynamic_len |
| 962 | #define __get_dynamic_len(field) this_cpu_ptr(<tng_dynamic_len_stack)->stack[__dynamic_len_idx++] |
| 963 | |
| 964 | #undef TP_PROTO |
| 965 | #define TP_PROTO(...) __VA_ARGS__ |
| 966 | |
| 967 | #undef TP_ARGS |
| 968 | #define TP_ARGS(...) __VA_ARGS__ |
| 969 | |
| 970 | #undef TP_FIELDS |
| 971 | #define TP_FIELDS(...) __VA_ARGS__ |
| 972 | |
| 973 | #undef TP_locvar |
| 974 | #define TP_locvar(...) __VA_ARGS__ |
| 975 | |
| 976 | #undef TP_code_pre |
| 977 | #define TP_code_pre(...) __VA_ARGS__ |
| 978 | |
| 979 | #undef TP_code_post |
| 980 | #define TP_code_post(...) __VA_ARGS__ |
| 981 | |
| 982 | /* |
| 983 | * For state dump, check that "session" argument (mandatory) matches the |
| 984 | * session this event belongs to. Ensures that we write state dump data only |
| 985 | * into the started session, not into all sessions. |
| 986 | */ |
| 987 | #ifdef TP_SESSION_CHECK |
| 988 | #define _TP_SESSION_CHECK(session, csession) (session == csession) |
| 989 | #else /* TP_SESSION_CHECK */ |
| 990 | #define _TP_SESSION_CHECK(session, csession) 1 |
| 991 | #endif /* TP_SESSION_CHECK */ |
| 992 | |
| 993 | /* |
| 994 | * Using twice size for filter stack data to hold size and pointer for |
| 995 | * each field (worse case). For integers, max size required is 64-bit. |
| 996 | * Same for double-precision floats. Those fit within |
| 997 | * 2*sizeof(unsigned long) for all supported architectures. |
| 998 | * Perform UNION (||) of filter runtime list. |
| 999 | */ |
| 1000 | #undef _LTTNG_TRACEPOINT_EVENT_CLASS_CODE |
| 1001 | #define _LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _data_proto, _locvar_args, _locvar, _code_pre, _fields, _code_post) \ |
| 1002 | static void __event_probe__##_name(_data_proto) \ |
| 1003 | { \ |
| 1004 | struct probe_local_vars { _locvar }; \ |
| 1005 | struct lttng_kernel_event_common *__event = __data; \ |
| 1006 | struct lttng_kernel_probe_ctx __lttng_probe_ctx = { \ |
| 1007 | .event = __event, \ |
| 1008 | .interruptible = !irqs_disabled(), \ |
| 1009 | }; \ |
| 1010 | union { \ |
| 1011 | size_t __dynamic_len_removed[ARRAY_SIZE(__event_fields___##_name)]; \ |
| 1012 | char __interpreter_stack_data[2 * sizeof(unsigned long) * ARRAY_SIZE(__event_fields___##_name)]; \ |
| 1013 | } __stackvar; \ |
| 1014 | size_t __orig_dynamic_len_offset, __dynamic_len_idx __attribute__((unused)); \ |
| 1015 | struct probe_local_vars __tp_locvar; \ |
| 1016 | struct probe_local_vars *tp_locvar __attribute__((unused)) = \ |
| 1017 | &__tp_locvar; \ |
| 1018 | bool __interpreter_stack_prepared = false; \ |
| 1019 | \ |
| 1020 | switch (__event->type) { \ |
| 1021 | case LTTNG_KERNEL_EVENT_TYPE_RECORDER: \ |
| 1022 | { \ |
| 1023 | struct lttng_kernel_event_recorder *__event_recorder = \ |
| 1024 | container_of(__event, struct lttng_kernel_event_recorder, parent); \ |
| 1025 | struct lttng_channel *__chan = __event_recorder->chan; \ |
| 1026 | struct lttng_kernel_session *__session = __chan->session; \ |
| 1027 | struct lttng_kernel_id_tracker_rcu *__lf; \ |
| 1028 | \ |
| 1029 | if (!_TP_SESSION_CHECK(session, __session)) \ |
| 1030 | return; \ |
| 1031 | if (unlikely(!LTTNG_READ_ONCE(__session->active))) \ |
| 1032 | return; \ |
| 1033 | if (unlikely(!LTTNG_READ_ONCE(__chan->enabled))) \ |
| 1034 | return; \ |
| 1035 | __lf = lttng_rcu_dereference(__session->pid_tracker.p); \ |
| 1036 | if (__lf && likely(!lttng_id_tracker_lookup(__lf, current->tgid))) \ |
| 1037 | return; \ |
| 1038 | __lf = lttng_rcu_dereference(__session->vpid_tracker.p); \ |
| 1039 | if (__lf && likely(!lttng_id_tracker_lookup(__lf, task_tgid_vnr(current)))) \ |
| 1040 | return; \ |
| 1041 | __lf = lttng_rcu_dereference(__session->uid_tracker.p); \ |
| 1042 | if (__lf && likely(!lttng_id_tracker_lookup(__lf, \ |
| 1043 | lttng_current_uid()))) \ |
| 1044 | return; \ |
| 1045 | __lf = lttng_rcu_dereference(__session->vuid_tracker.p); \ |
| 1046 | if (__lf && likely(!lttng_id_tracker_lookup(__lf, \ |
| 1047 | lttng_current_vuid()))) \ |
| 1048 | return; \ |
| 1049 | __lf = lttng_rcu_dereference(__session->gid_tracker.p); \ |
| 1050 | if (__lf && likely(!lttng_id_tracker_lookup(__lf, \ |
| 1051 | lttng_current_gid()))) \ |
| 1052 | return; \ |
| 1053 | __lf = lttng_rcu_dereference(__session->vgid_tracker.p); \ |
| 1054 | if (__lf && likely(!lttng_id_tracker_lookup(__lf, \ |
| 1055 | lttng_current_vgid()))) \ |
| 1056 | return; \ |
| 1057 | break; \ |
| 1058 | } \ |
| 1059 | case LTTNG_KERNEL_EVENT_TYPE_NOTIFIER: \ |
| 1060 | break; \ |
| 1061 | default: \ |
| 1062 | WARN_ON_ONCE(1); \ |
| 1063 | } \ |
| 1064 | if (unlikely(!READ_ONCE(__event->enabled))) \ |
| 1065 | return; \ |
| 1066 | __orig_dynamic_len_offset = this_cpu_ptr(<tng_dynamic_len_stack)->offset; \ |
| 1067 | __dynamic_len_idx = __orig_dynamic_len_offset; \ |
| 1068 | _code_pre \ |
| 1069 | if (unlikely(READ_ONCE(__event->eval_filter))) { \ |
| 1070 | __event_prepare_interpreter_stack__##_name(__stackvar.__interpreter_stack_data, \ |
| 1071 | _locvar_args); \ |
| 1072 | __interpreter_stack_prepared = true; \ |
| 1073 | if (likely(__event->run_filter(__event, \ |
| 1074 | __stackvar.__interpreter_stack_data, &__lttng_probe_ctx, NULL) != LTTNG_KERNEL_EVENT_FILTER_ACCEPT)) \ |
| 1075 | goto __post; \ |
| 1076 | } \ |
| 1077 | switch (__event->type) { \ |
| 1078 | case LTTNG_KERNEL_EVENT_TYPE_RECORDER: \ |
| 1079 | { \ |
| 1080 | struct lttng_kernel_event_recorder *__event_recorder = \ |
| 1081 | container_of(__event, struct lttng_kernel_event_recorder, parent); \ |
| 1082 | struct lttng_channel *__chan = __event_recorder->chan; \ |
| 1083 | struct lttng_kernel_ring_buffer_ctx __ctx; \ |
| 1084 | ssize_t __event_len; \ |
| 1085 | size_t __event_align; \ |
| 1086 | int __ret; \ |
| 1087 | \ |
| 1088 | __event_len = __event_get_size__##_name(_locvar_args); \ |
| 1089 | if (unlikely(__event_len < 0)) { \ |
| 1090 | lib_ring_buffer_lost_event_too_big(__chan->chan); \ |
| 1091 | goto __post; \ |
| 1092 | } \ |
| 1093 | __event_align = __event_get_align__##_name(_locvar_args); \ |
| 1094 | lib_ring_buffer_ctx_init(&__ctx, __event_recorder, __event_len, \ |
| 1095 | __event_align, &__lttng_probe_ctx); \ |
| 1096 | __ret = __chan->ops->event_reserve(&__ctx); \ |
| 1097 | if (__ret < 0) \ |
| 1098 | goto __post; \ |
| 1099 | _fields \ |
| 1100 | __chan->ops->event_commit(&__ctx); \ |
| 1101 | break; \ |
| 1102 | } \ |
| 1103 | case LTTNG_KERNEL_EVENT_TYPE_NOTIFIER: \ |
| 1104 | { \ |
| 1105 | struct lttng_kernel_event_notifier *__event_notifier = \ |
| 1106 | container_of(__event, struct lttng_kernel_event_notifier, parent); \ |
| 1107 | struct lttng_kernel_notification_ctx __notif_ctx; \ |
| 1108 | \ |
| 1109 | __notif_ctx.eval_capture = LTTNG_READ_ONCE(__event_notifier->eval_capture); \ |
| 1110 | if (unlikely(!__interpreter_stack_prepared && __notif_ctx.eval_capture)) \ |
| 1111 | __event_prepare_interpreter_stack__##_name( \ |
| 1112 | __stackvar.__interpreter_stack_data, \ |
| 1113 | _locvar_args); \ |
| 1114 | \ |
| 1115 | __event_notifier->notification_send(__event_notifier, \ |
| 1116 | __stackvar.__interpreter_stack_data, \ |
| 1117 | &__lttng_probe_ctx, \ |
| 1118 | &__notif_ctx); \ |
| 1119 | break; \ |
| 1120 | } \ |
| 1121 | default: \ |
| 1122 | WARN_ON_ONCE(1); \ |
| 1123 | } \ |
| 1124 | __post: \ |
| 1125 | _code_post \ |
| 1126 | barrier(); /* use before un-reserve. */ \ |
| 1127 | this_cpu_ptr(<tng_dynamic_len_stack)->offset = __orig_dynamic_len_offset; \ |
| 1128 | return; \ |
| 1129 | } |
| 1130 | |
| 1131 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE |
| 1132 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \ |
| 1133 | _LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, PARAMS(void *__data, _proto), PARAMS(tp_locvar, _args), \ |
| 1134 | PARAMS(_locvar), PARAMS(_code_pre), PARAMS(_fields), PARAMS(_code_post)) |
| 1135 | |
| 1136 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS |
| 1137 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \ |
| 1138 | _LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, PARAMS(void *__data), PARAMS(tp_locvar), PARAMS(_locvar), \ |
| 1139 | PARAMS(_code_pre), PARAMS(_fields), PARAMS(_code_post)) |
| 1140 | |
| 1141 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| 1142 | |
| 1143 | #undef __get_dynamic_len |
| 1144 | |
| 1145 | /* |
| 1146 | * Stage 7 of the trace events. |
| 1147 | * |
| 1148 | * Create event descriptions. |
| 1149 | */ |
| 1150 | |
| 1151 | /* Named field types must be defined in lttng-types.h */ |
| 1152 | |
| 1153 | #include <lttng/events-reset.h> /* Reset all macros within LTTNG_TRACEPOINT_EVENT */ |
| 1154 | |
| 1155 | #ifndef TP_PROBE_CB |
| 1156 | #define TP_PROBE_CB(_template) &__event_probe__##_template |
| 1157 | #endif |
| 1158 | |
| 1159 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS |
| 1160 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map) \ |
| 1161 | static const struct lttng_kernel_event_desc __event_desc___##_map = { \ |
| 1162 | .event_name = #_map, \ |
| 1163 | .event_kname = #_name, \ |
| 1164 | .probe_callback = (void (*)(void)) TP_PROBE_CB(_template), \ |
| 1165 | .fields = __event_fields___##_template, \ |
| 1166 | .nr_fields = ARRAY_SIZE(__event_fields___##_template), \ |
| 1167 | .owner = THIS_MODULE, \ |
| 1168 | }; |
| 1169 | |
| 1170 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP |
| 1171 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(_template, _name, _map, _proto, _args) \ |
| 1172 | LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map) |
| 1173 | |
| 1174 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| 1175 | |
| 1176 | /* |
| 1177 | * Stage 8 of the trace events. |
| 1178 | * |
| 1179 | * Create an array of event description pointers. |
| 1180 | */ |
| 1181 | |
| 1182 | #include <lttng/events-reset.h> /* Reset all macros within LTTNG_TRACEPOINT_EVENT */ |
| 1183 | |
| 1184 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS |
| 1185 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map) \ |
| 1186 | &__event_desc___##_map, |
| 1187 | |
| 1188 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP |
| 1189 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(_template, _name, _map, _proto, _args) \ |
| 1190 | LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map) |
| 1191 | |
| 1192 | #define TP_ID1(_token, _system) _token##_system |
| 1193 | #define TP_ID(_token, _system) TP_ID1(_token, _system) |
| 1194 | |
| 1195 | static const struct lttng_kernel_event_desc *TP_ID(__event_desc___, TRACE_SYSTEM)[] = { |
| 1196 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| 1197 | }; |
| 1198 | |
| 1199 | #undef TP_ID1 |
| 1200 | #undef TP_ID |
| 1201 | |
| 1202 | /* |
| 1203 | * Stage 9 of the trace events. |
| 1204 | * |
| 1205 | * Create a toplevel descriptor for the whole probe. |
| 1206 | */ |
| 1207 | |
| 1208 | #define TP_ID1(_token, _system) _token##_system |
| 1209 | #define TP_ID(_token, _system) TP_ID1(_token, _system) |
| 1210 | |
| 1211 | /* non-const because list head will be modified when registered. */ |
| 1212 | static __used struct lttng_kernel_probe_desc TP_ID(__probe_desc___, TRACE_SYSTEM) = { |
| 1213 | .provider_name = __stringify(TRACE_SYSTEM), |
| 1214 | .event_desc = TP_ID(__event_desc___, TRACE_SYSTEM), |
| 1215 | .nr_events = ARRAY_SIZE(TP_ID(__event_desc___, TRACE_SYSTEM)), |
| 1216 | .head = { NULL, NULL }, |
| 1217 | .lazy_init_head = { NULL, NULL }, |
| 1218 | .lazy = 0, |
| 1219 | }; |
| 1220 | |
| 1221 | #undef TP_ID1 |
| 1222 | #undef TP_ID |
| 1223 | |
| 1224 | /* |
| 1225 | * Stage 10 of the trace events. |
| 1226 | * |
| 1227 | * Register/unregister probes at module load/unload. |
| 1228 | */ |
| 1229 | |
| 1230 | #include <lttng/events-reset.h> /* Reset all macros within LTTNG_TRACEPOINT_EVENT */ |
| 1231 | |
| 1232 | #define TP_ID1(_token, _system) _token##_system |
| 1233 | #define TP_ID(_token, _system) TP_ID1(_token, _system) |
| 1234 | #define module_init_eval1(_token, _system) module_init(_token##_system) |
| 1235 | #define module_init_eval(_token, _system) module_init_eval1(_token, _system) |
| 1236 | #define module_exit_eval1(_token, _system) module_exit(_token##_system) |
| 1237 | #define module_exit_eval(_token, _system) module_exit_eval1(_token, _system) |
| 1238 | |
| 1239 | #ifndef TP_MODULE_NOINIT |
| 1240 | static int TP_ID(__lttng_events_init__, TRACE_SYSTEM)(void) |
| 1241 | { |
| 1242 | wrapper_vmalloc_sync_mappings(); |
| 1243 | return lttng_kernel_probe_register(&TP_ID(__probe_desc___, TRACE_SYSTEM)); |
| 1244 | } |
| 1245 | |
| 1246 | static void TP_ID(__lttng_events_exit__, TRACE_SYSTEM)(void) |
| 1247 | { |
| 1248 | lttng_kernel_probe_unregister(&TP_ID(__probe_desc___, TRACE_SYSTEM)); |
| 1249 | } |
| 1250 | |
| 1251 | #ifndef TP_MODULE_NOAUTOLOAD |
| 1252 | module_init_eval(__lttng_events_init__, TRACE_SYSTEM); |
| 1253 | module_exit_eval(__lttng_events_exit__, TRACE_SYSTEM); |
| 1254 | #endif |
| 1255 | |
| 1256 | #endif |
| 1257 | |
| 1258 | #undef module_init_eval |
| 1259 | #undef module_exit_eval |
| 1260 | #undef TP_ID1 |
| 1261 | #undef TP_ID |
| 1262 | |
| 1263 | #undef TP_PROTO |
| 1264 | #undef TP_ARGS |