| 1 | #include <lttng.h> |
| 2 | |
| 3 | /* |
| 4 | * Macros mapping tp_assign() to "=", tp_memcpy() to memcpy() and tp_strcpy() to |
| 5 | * strcpy(). |
| 6 | */ |
| 7 | #define tp_assign(dest, src) \ |
| 8 | lib_ring_buffer_align_ctx(config, &ctx, sizeof(src)); \ |
| 9 | lib_ring_buffer_write(config, &ctx, &src, sizeof(src)); |
| 10 | |
| 11 | #define tp_memcpy(dest, src, len) \ |
| 12 | lib_ring_buffer_align_ctx(config, &ctx, sizeof(*(src))); \ |
| 13 | lib_ring_buffer_write(config, &ctx, &src, len); |
| 14 | |
| 15 | /* TODO */ |
| 16 | #define tp_strcpy(dest, src) __assign_str(dest, src) |
| 17 | |
| 18 | /* |
| 19 | * Stage 1 of the trace events. |
| 20 | * |
| 21 | * Create event field type metadata section. |
| 22 | */ |
| 23 | |
| 24 | /* |
| 25 | * DECLARE_EVENT_CLASS can be used to add a generic function |
| 26 | * handlers for events. That is, if all events have the same |
| 27 | * parameters and just have distinct trace points. |
| 28 | * Each tracepoint can be defined with DEFINE_EVENT and that |
| 29 | * will map the DECLARE_EVENT_CLASS to the tracepoint. |
| 30 | * |
| 31 | * TRACE_EVENT is a one to one mapping between tracepoint and template. |
| 32 | */ |
| 33 | #undef TRACE_EVENT |
| 34 | #define TRACE_EVENT(name, proto, args, tstruct, assign, print) \ |
| 35 | DECLARE_EVENT_CLASS(name, \ |
| 36 | PARAMS(proto), \ |
| 37 | PARAMS(args), \ |
| 38 | PARAMS(tstruct), \ |
| 39 | PARAMS(assign), \ |
| 40 | PARAMS(print)); \ |
| 41 | DEFINE_EVENT(name, name, PARAMS(proto), PARAMS(args)); |
| 42 | |
| 43 | /* Field types must be defined in lttng-types.h */ |
| 44 | |
| 45 | #undef __field |
| 46 | #define __field(type, item) type item; |
| 47 | |
| 48 | #undef __field_ext |
| 49 | #define __field_ext(type, item, filter_type) type item; |
| 50 | |
| 51 | #undef __array |
| 52 | #define __array(type, item, len) \ |
| 53 | type { parent = array; length = len; elem_type = type; } item; |
| 54 | |
| 55 | /* TODO */ |
| 56 | |
| 57 | #undef __dynamic_array |
| 58 | #define __dynamic_array(type, item, len) u32 __data_loc_##item; |
| 59 | |
| 60 | #undef __string |
| 61 | #define __string(item, src) __dynamic_array(char, item, -1) |
| 62 | |
| 63 | #undef TP_STRUCT__entry |
| 64 | #define TP_STRUCT__entry(args...) args |
| 65 | |
| 66 | #undef DECLARE_EVENT_CLASS |
| 67 | #define DECLARE_EVENT_CLASS(name, proto, args, tstruct, assign, print) \ |
| 68 | struct ftrace_raw_##name { \ |
| 69 | struct trace_entry ent; \ |
| 70 | tstruct \ |
| 71 | char __data[0]; \ |
| 72 | }; \ |
| 73 | \ |
| 74 | static struct ftrace_event_class event_class_##name; |
| 75 | |
| 76 | #undef DEFINE_EVENT |
| 77 | #define DEFINE_EVENT(template, name, proto, args) \ |
| 78 | static struct ftrace_event_call __used \ |
| 79 | __attribute__((__aligned__(4))) event_##name |
| 80 | |
| 81 | #undef DEFINE_EVENT_PRINT |
| 82 | #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ |
| 83 | DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) |
| 84 | |
| 85 | /* Callbacks are meaningless to ftrace. */ |
| 86 | #undef TRACE_EVENT_FN |
| 87 | #define TRACE_EVENT_FN(name, proto, args, tstruct, \ |
| 88 | assign, print, reg, unreg) \ |
| 89 | TRACE_EVENT(name, PARAMS(proto), PARAMS(args), \ |
| 90 | PARAMS(tstruct), PARAMS(assign), PARAMS(print)) \ |
| 91 | |
| 92 | |
| 93 | |
| 94 | |
| 95 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| 96 | |
| 97 | /* |
| 98 | * Stage 2 of the trace events. |
| 99 | * |
| 100 | * Create static inline function that calculates event size. |
| 101 | */ |
| 102 | |
| 103 | |
| 104 | |
| 105 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| 106 | |
| 107 | /* |
| 108 | * Stage 3 of the trace events. |
| 109 | * |
| 110 | * Create the probe function : call even size calculation and write event data |
| 111 | * into the buffer. |
| 112 | */ |
| 113 | |
| 114 | |
| 115 | |
| 116 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| 117 | |
| 118 | |
| 119 | |
| 120 | |
| 121 | #include <linux/ftrace_event.h> |
| 122 | |
| 123 | /* |
| 124 | * DECLARE_EVENT_CLASS can be used to add a generic function |
| 125 | * handlers for events. That is, if all events have the same |
| 126 | * parameters and just have distinct trace points. |
| 127 | * Each tracepoint can be defined with DEFINE_EVENT and that |
| 128 | * will map the DECLARE_EVENT_CLASS to the tracepoint. |
| 129 | * |
| 130 | * TRACE_EVENT is a one to one mapping between tracepoint and template. |
| 131 | */ |
| 132 | #undef TRACE_EVENT |
| 133 | #define TRACE_EVENT(name, proto, args, tstruct, assign, print) \ |
| 134 | DECLARE_EVENT_CLASS(name, \ |
| 135 | PARAMS(proto), \ |
| 136 | PARAMS(args), \ |
| 137 | PARAMS(tstruct), \ |
| 138 | PARAMS(assign), \ |
| 139 | PARAMS(print)); \ |
| 140 | DEFINE_EVENT(name, name, PARAMS(proto), PARAMS(args)); |
| 141 | |
| 142 | |
| 143 | #undef __field |
| 144 | #define __field(type, item) type item; |
| 145 | |
| 146 | #undef __field_ext |
| 147 | #define __field_ext(type, item, filter_type) type item; |
| 148 | |
| 149 | #undef __array |
| 150 | #define __array(type, item, len) type item[len]; |
| 151 | |
| 152 | #undef __dynamic_array |
| 153 | #define __dynamic_array(type, item, len) u32 __data_loc_##item; |
| 154 | |
| 155 | #undef __string |
| 156 | #define __string(item, src) __dynamic_array(char, item, -1) |
| 157 | |
| 158 | #undef TP_STRUCT__entry |
| 159 | #define TP_STRUCT__entry(args...) args |
| 160 | |
| 161 | #undef DECLARE_EVENT_CLASS |
| 162 | #define DECLARE_EVENT_CLASS(name, proto, args, tstruct, assign, print) \ |
| 163 | struct ftrace_raw_##name { \ |
| 164 | struct trace_entry ent; \ |
| 165 | tstruct \ |
| 166 | char __data[0]; \ |
| 167 | }; \ |
| 168 | \ |
| 169 | static struct ftrace_event_class event_class_##name; |
| 170 | |
| 171 | #undef DEFINE_EVENT |
| 172 | #define DEFINE_EVENT(template, name, proto, args) \ |
| 173 | static struct ftrace_event_call __used \ |
| 174 | __attribute__((__aligned__(4))) event_##name |
| 175 | |
| 176 | #undef DEFINE_EVENT_PRINT |
| 177 | #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ |
| 178 | DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) |
| 179 | |
| 180 | /* Callbacks are meaningless to ftrace. */ |
| 181 | #undef TRACE_EVENT_FN |
| 182 | #define TRACE_EVENT_FN(name, proto, args, tstruct, \ |
| 183 | assign, print, reg, unreg) \ |
| 184 | TRACE_EVENT(name, PARAMS(proto), PARAMS(args), \ |
| 185 | PARAMS(tstruct), PARAMS(assign), PARAMS(print)) \ |
| 186 | |
| 187 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| 188 | |
| 189 | |
| 190 | /* |
| 191 | * Stage 2 of the trace events. |
| 192 | * |
| 193 | * Create static inline function that calculates event size. |
| 194 | */ |
| 195 | |
| 196 | #undef __field |
| 197 | #define __field(type, item) |
| 198 | |
| 199 | #undef __field_ext |
| 200 | #define __field_ext(type, item, filter_type) |
| 201 | |
| 202 | #undef __array |
| 203 | #define __array(type, item, len) |
| 204 | |
| 205 | #undef __dynamic_array |
| 206 | #define __dynamic_array(type, item, len) u32 item; |
| 207 | |
| 208 | #undef __string |
| 209 | #define __string(item, src) __dynamic_array(char, item, -1) |
| 210 | |
| 211 | #undef DECLARE_EVENT_CLASS |
| 212 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ |
| 213 | struct ftrace_data_offsets_##call { \ |
| 214 | tstruct; \ |
| 215 | }; |
| 216 | |
| 217 | #undef DEFINE_EVENT |
| 218 | #define DEFINE_EVENT(template, name, proto, args) |
| 219 | |
| 220 | #undef DEFINE_EVENT_PRINT |
| 221 | #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ |
| 222 | DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) |
| 223 | |
| 224 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| 225 | |
| 226 | /* |
| 227 | * Stage 3 of the trace events. |
| 228 | * |
| 229 | * Create the probe function : call even size calculation and write event data |
| 230 | * into the buffer. |
| 231 | */ |
| 232 | |
| 233 | #undef __entry |
| 234 | #define __entry field |
| 235 | |
| 236 | #undef TP_printk |
| 237 | #define TP_printk(fmt, args...) fmt "\n", args |
| 238 | |
| 239 | #undef __get_dynamic_array |
| 240 | #define __get_dynamic_array(field) \ |
| 241 | ((void *)__entry + (__entry->__data_loc_##field & 0xffff)) |
| 242 | |
| 243 | #undef __get_str |
| 244 | #define __get_str(field) (char *)__get_dynamic_array(field) |
| 245 | |
| 246 | #undef __print_flags |
| 247 | #define __print_flags(flag, delim, flag_array...) \ |
| 248 | ({ \ |
| 249 | static const struct trace_print_flags __flags[] = \ |
| 250 | { flag_array, { -1, NULL }}; \ |
| 251 | ftrace_print_flags_seq(p, delim, flag, __flags); \ |
| 252 | }) |
| 253 | |
| 254 | #undef __print_symbolic |
| 255 | #define __print_symbolic(value, symbol_array...) \ |
| 256 | ({ \ |
| 257 | static const struct trace_print_flags symbols[] = \ |
| 258 | { symbol_array, { -1, NULL }}; \ |
| 259 | ftrace_print_symbols_seq(p, value, symbols); \ |
| 260 | }) |
| 261 | |
| 262 | #undef __print_hex |
| 263 | #define __print_hex(buf, buf_len) ftrace_print_hex_seq(p, buf, buf_len) |
| 264 | |
| 265 | #undef DECLARE_EVENT_CLASS |
| 266 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ |
| 267 | static notrace enum print_line_t \ |
| 268 | ftrace_raw_output_##call(struct trace_iterator *iter, int flags, \ |
| 269 | struct trace_event *trace_event) \ |
| 270 | { \ |
| 271 | struct ftrace_event_call *event; \ |
| 272 | struct trace_seq *s = &iter->seq; \ |
| 273 | struct ftrace_raw_##call *field; \ |
| 274 | struct trace_entry *entry; \ |
| 275 | struct trace_seq *p = &iter->tmp_seq; \ |
| 276 | int ret; \ |
| 277 | \ |
| 278 | event = container_of(trace_event, struct ftrace_event_call, \ |
| 279 | event); \ |
| 280 | \ |
| 281 | entry = iter->ent; \ |
| 282 | \ |
| 283 | if (entry->type != event->event.type) { \ |
| 284 | WARN_ON_ONCE(1); \ |
| 285 | return TRACE_TYPE_UNHANDLED; \ |
| 286 | } \ |
| 287 | \ |
| 288 | field = (typeof(field))entry; \ |
| 289 | \ |
| 290 | trace_seq_init(p); \ |
| 291 | ret = trace_seq_printf(s, "%s: ", event->name); \ |
| 292 | if (ret) \ |
| 293 | ret = trace_seq_printf(s, print); \ |
| 294 | if (!ret) \ |
| 295 | return TRACE_TYPE_PARTIAL_LINE; \ |
| 296 | \ |
| 297 | return TRACE_TYPE_HANDLED; \ |
| 298 | } \ |
| 299 | static struct trace_event_functions ftrace_event_type_funcs_##call = { \ |
| 300 | .trace = ftrace_raw_output_##call, \ |
| 301 | }; |
| 302 | |
| 303 | #undef DEFINE_EVENT_PRINT |
| 304 | #define DEFINE_EVENT_PRINT(template, call, proto, args, print) \ |
| 305 | static notrace enum print_line_t \ |
| 306 | ftrace_raw_output_##call(struct trace_iterator *iter, int flags, \ |
| 307 | struct trace_event *event) \ |
| 308 | { \ |
| 309 | struct trace_seq *s = &iter->seq; \ |
| 310 | struct ftrace_raw_##template *field; \ |
| 311 | struct trace_entry *entry; \ |
| 312 | struct trace_seq *p = &iter->tmp_seq; \ |
| 313 | int ret; \ |
| 314 | \ |
| 315 | entry = iter->ent; \ |
| 316 | \ |
| 317 | if (entry->type != event_##call.event.type) { \ |
| 318 | WARN_ON_ONCE(1); \ |
| 319 | return TRACE_TYPE_UNHANDLED; \ |
| 320 | } \ |
| 321 | \ |
| 322 | field = (typeof(field))entry; \ |
| 323 | \ |
| 324 | trace_seq_init(p); \ |
| 325 | ret = trace_seq_printf(s, "%s: ", #call); \ |
| 326 | if (ret) \ |
| 327 | ret = trace_seq_printf(s, print); \ |
| 328 | if (!ret) \ |
| 329 | return TRACE_TYPE_PARTIAL_LINE; \ |
| 330 | \ |
| 331 | return TRACE_TYPE_HANDLED; \ |
| 332 | } \ |
| 333 | static struct trace_event_functions ftrace_event_type_funcs_##call = { \ |
| 334 | .trace = ftrace_raw_output_##call, \ |
| 335 | }; |
| 336 | |
| 337 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| 338 | |
| 339 | #undef __field_ext |
| 340 | #define __field_ext(type, item, filter_type) \ |
| 341 | ret = trace_define_field(event_call, #type, #item, \ |
| 342 | offsetof(typeof(field), item), \ |
| 343 | sizeof(field.item), \ |
| 344 | is_signed_type(type), filter_type); \ |
| 345 | if (ret) \ |
| 346 | return ret; |
| 347 | |
| 348 | #undef __field |
| 349 | #define __field(type, item) __field_ext(type, item, FILTER_OTHER) |
| 350 | |
| 351 | #undef __array |
| 352 | #define __array(type, item, len) \ |
| 353 | BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \ |
| 354 | ret = trace_define_field(event_call, #type "[" #len "]", #item, \ |
| 355 | offsetof(typeof(field), item), \ |
| 356 | sizeof(field.item), \ |
| 357 | is_signed_type(type), FILTER_OTHER); \ |
| 358 | if (ret) \ |
| 359 | return ret; |
| 360 | |
| 361 | #undef __dynamic_array |
| 362 | #define __dynamic_array(type, item, len) \ |
| 363 | ret = trace_define_field(event_call, "__data_loc " #type "[]", #item, \ |
| 364 | offsetof(typeof(field), __data_loc_##item), \ |
| 365 | sizeof(field.__data_loc_##item), \ |
| 366 | is_signed_type(type), FILTER_OTHER); |
| 367 | |
| 368 | #undef __string |
| 369 | #define __string(item, src) __dynamic_array(char, item, -1) |
| 370 | |
| 371 | #undef DECLARE_EVENT_CLASS |
| 372 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print) \ |
| 373 | static int notrace \ |
| 374 | ftrace_define_fields_##call(struct ftrace_event_call *event_call) \ |
| 375 | { \ |
| 376 | struct ftrace_raw_##call field; \ |
| 377 | int ret; \ |
| 378 | \ |
| 379 | tstruct; \ |
| 380 | \ |
| 381 | return ret; \ |
| 382 | } |
| 383 | |
| 384 | #undef DEFINE_EVENT |
| 385 | #define DEFINE_EVENT(template, name, proto, args) |
| 386 | |
| 387 | #undef DEFINE_EVENT_PRINT |
| 388 | #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ |
| 389 | DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) |
| 390 | |
| 391 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| 392 | |
| 393 | /* |
| 394 | * remember the offset of each array from the beginning of the event. |
| 395 | */ |
| 396 | |
| 397 | #undef __entry |
| 398 | #define __entry entry |
| 399 | |
| 400 | #undef __field |
| 401 | #define __field(type, item) |
| 402 | |
| 403 | #undef __field_ext |
| 404 | #define __field_ext(type, item, filter_type) |
| 405 | |
| 406 | #undef __array |
| 407 | #define __array(type, item, len) |
| 408 | |
| 409 | #undef __dynamic_array |
| 410 | #define __dynamic_array(type, item, len) \ |
| 411 | __data_offsets->item = __data_size + \ |
| 412 | offsetof(typeof(*entry), __data); \ |
| 413 | __data_offsets->item |= (len * sizeof(type)) << 16; \ |
| 414 | __data_size += (len) * sizeof(type); |
| 415 | |
| 416 | #undef __string |
| 417 | #define __string(item, src) __dynamic_array(char, item, strlen(src) + 1) |
| 418 | |
| 419 | #undef DECLARE_EVENT_CLASS |
| 420 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ |
| 421 | static inline notrace int ftrace_get_offsets_##call( \ |
| 422 | struct ftrace_data_offsets_##call *__data_offsets, proto) \ |
| 423 | { \ |
| 424 | int __data_size = 0; \ |
| 425 | struct ftrace_raw_##call __maybe_unused *entry; \ |
| 426 | \ |
| 427 | tstruct; \ |
| 428 | \ |
| 429 | return __data_size; \ |
| 430 | } |
| 431 | |
| 432 | #undef DEFINE_EVENT |
| 433 | #define DEFINE_EVENT(template, name, proto, args) |
| 434 | |
| 435 | #undef DEFINE_EVENT_PRINT |
| 436 | #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ |
| 437 | DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) |
| 438 | |
| 439 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| 440 | |
| 441 | /* |
| 442 | * Stage 4 of the trace events. |
| 443 | * |
| 444 | * Override the macros in <trace/trace_events.h> to include the following: |
| 445 | * |
| 446 | * For those macros defined with TRACE_EVENT: |
| 447 | * |
| 448 | * static struct ftrace_event_call event_<call>; |
| 449 | * |
| 450 | * static void ftrace_raw_event_<call>(void *__data, proto) |
| 451 | * { |
| 452 | * struct ftrace_event_call *event_call = __data; |
| 453 | * struct ftrace_data_offsets_<call> __maybe_unused __data_offsets; |
| 454 | * struct ring_buffer_event *event; |
| 455 | * struct ftrace_raw_<call> *entry; <-- defined in stage 1 |
| 456 | * struct ring_buffer *buffer; |
| 457 | * unsigned long irq_flags; |
| 458 | * int __data_size; |
| 459 | * int pc; |
| 460 | * |
| 461 | * local_save_flags(irq_flags); |
| 462 | * pc = preempt_count(); |
| 463 | * |
| 464 | * __data_size = ftrace_get_offsets_<call>(&__data_offsets, args); |
| 465 | * |
| 466 | * event = trace_current_buffer_lock_reserve(&buffer, |
| 467 | * event_<call>->event.type, |
| 468 | * sizeof(*entry) + __data_size, |
| 469 | * irq_flags, pc); |
| 470 | * if (!event) |
| 471 | * return; |
| 472 | * entry = ring_buffer_event_data(event); |
| 473 | * |
| 474 | * { <assign>; } <-- Here we assign the entries by the __field and |
| 475 | * __array macros. |
| 476 | * |
| 477 | * if (!filter_current_check_discard(buffer, event_call, entry, event)) |
| 478 | * trace_current_buffer_unlock_commit(buffer, |
| 479 | * event, irq_flags, pc); |
| 480 | * } |
| 481 | * |
| 482 | * static struct trace_event ftrace_event_type_<call> = { |
| 483 | * .trace = ftrace_raw_output_<call>, <-- stage 2 |
| 484 | * }; |
| 485 | * |
| 486 | * static const char print_fmt_<call>[] = <TP_printk>; |
| 487 | * |
| 488 | * static struct ftrace_event_class __used event_class_<template> = { |
| 489 | * .system = "<system>", |
| 490 | * .define_fields = ftrace_define_fields_<call>, |
| 491 | * .fields = LIST_HEAD_INIT(event_class_##call.fields), |
| 492 | * .raw_init = trace_event_raw_init, |
| 493 | * .probe = ftrace_raw_event_##call, |
| 494 | * .reg = ftrace_event_reg, |
| 495 | * }; |
| 496 | * |
| 497 | * static struct ftrace_event_call __used |
| 498 | * __attribute__((__aligned__(4))) |
| 499 | * __attribute__((section("_ftrace_events"))) event_<call> = { |
| 500 | * .name = "<call>", |
| 501 | * .class = event_class_<template>, |
| 502 | * .event = &ftrace_event_type_<call>, |
| 503 | * .print_fmt = print_fmt_<call>, |
| 504 | * }; |
| 505 | * |
| 506 | */ |
| 507 | |
| 508 | #ifdef CONFIG_PERF_EVENTS |
| 509 | |
| 510 | #define _TRACE_PERF_PROTO(call, proto) \ |
| 511 | static notrace void \ |
| 512 | perf_trace_##call(void *__data, proto); |
| 513 | |
| 514 | #define _TRACE_PERF_INIT(call) \ |
| 515 | .perf_probe = perf_trace_##call, |
| 516 | |
| 517 | #else |
| 518 | #define _TRACE_PERF_PROTO(call, proto) |
| 519 | #define _TRACE_PERF_INIT(call) |
| 520 | #endif /* CONFIG_PERF_EVENTS */ |
| 521 | |
| 522 | #undef __entry |
| 523 | #define __entry entry |
| 524 | |
| 525 | #undef __field |
| 526 | #define __field(type, item) |
| 527 | |
| 528 | #undef __array |
| 529 | #define __array(type, item, len) |
| 530 | |
| 531 | #undef __dynamic_array |
| 532 | #define __dynamic_array(type, item, len) \ |
| 533 | __entry->__data_loc_##item = __data_offsets.item; |
| 534 | |
| 535 | #undef __string |
| 536 | #define __string(item, src) __dynamic_array(char, item, -1) \ |
| 537 | |
| 538 | #undef __assign_str |
| 539 | #define __assign_str(dst, src) \ |
| 540 | strcpy(__get_str(dst), src); |
| 541 | |
| 542 | #undef TP_fast_assign |
| 543 | #define TP_fast_assign(args...) args |
| 544 | |
| 545 | #undef TP_perf_assign |
| 546 | #define TP_perf_assign(args...) |
| 547 | |
| 548 | #undef DECLARE_EVENT_CLASS |
| 549 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ |
| 550 | \ |
| 551 | static notrace void \ |
| 552 | ftrace_raw_event_##call(void *__data, proto) \ |
| 553 | { \ |
| 554 | struct ftrace_event_call *event_call = __data; \ |
| 555 | struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\ |
| 556 | struct ring_buffer_event *event; \ |
| 557 | struct ftrace_raw_##call *entry; \ |
| 558 | struct ring_buffer *buffer; \ |
| 559 | unsigned long irq_flags; \ |
| 560 | int __data_size; \ |
| 561 | int pc; \ |
| 562 | \ |
| 563 | local_save_flags(irq_flags); \ |
| 564 | pc = preempt_count(); \ |
| 565 | \ |
| 566 | __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \ |
| 567 | \ |
| 568 | event = trace_current_buffer_lock_reserve(&buffer, \ |
| 569 | event_call->event.type, \ |
| 570 | sizeof(*entry) + __data_size, \ |
| 571 | irq_flags, pc); \ |
| 572 | if (!event) \ |
| 573 | return; \ |
| 574 | entry = ring_buffer_event_data(event); \ |
| 575 | \ |
| 576 | tstruct \ |
| 577 | \ |
| 578 | { assign; } \ |
| 579 | \ |
| 580 | if (!filter_current_check_discard(buffer, event_call, entry, event)) \ |
| 581 | trace_nowake_buffer_unlock_commit(buffer, \ |
| 582 | event, irq_flags, pc); \ |
| 583 | } |
| 584 | /* |
| 585 | * The ftrace_test_probe is compiled out, it is only here as a build time check |
| 586 | * to make sure that if the tracepoint handling changes, the ftrace probe will |
| 587 | * fail to compile unless it too is updated. |
| 588 | */ |
| 589 | |
| 590 | #undef DEFINE_EVENT |
| 591 | #define DEFINE_EVENT(template, call, proto, args) \ |
| 592 | static inline void ftrace_test_probe_##call(void) \ |
| 593 | { \ |
| 594 | check_trace_callback_type_##call(ftrace_raw_event_##template); \ |
| 595 | } |
| 596 | |
| 597 | #undef DEFINE_EVENT_PRINT |
| 598 | #define DEFINE_EVENT_PRINT(template, name, proto, args, print) |
| 599 | |
| 600 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| 601 | |
| 602 | #undef __entry |
| 603 | #define __entry REC |
| 604 | |
| 605 | #undef __print_flags |
| 606 | #undef __print_symbolic |
| 607 | #undef __get_dynamic_array |
| 608 | #undef __get_str |
| 609 | |
| 610 | #undef TP_printk |
| 611 | #define TP_printk(fmt, args...) "\"" fmt "\", " __stringify(args) |
| 612 | |
| 613 | #undef DECLARE_EVENT_CLASS |
| 614 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ |
| 615 | _TRACE_PERF_PROTO(call, PARAMS(proto)); \ |
| 616 | static const char print_fmt_##call[] = print; \ |
| 617 | static struct ftrace_event_class __used event_class_##call = { \ |
| 618 | .system = __stringify(TRACE_SYSTEM), \ |
| 619 | .define_fields = ftrace_define_fields_##call, \ |
| 620 | .fields = LIST_HEAD_INIT(event_class_##call.fields),\ |
| 621 | .raw_init = trace_event_raw_init, \ |
| 622 | .probe = ftrace_raw_event_##call, \ |
| 623 | .reg = ftrace_event_reg, \ |
| 624 | _TRACE_PERF_INIT(call) \ |
| 625 | }; |
| 626 | |
| 627 | #undef DEFINE_EVENT |
| 628 | #define DEFINE_EVENT(template, call, proto, args) \ |
| 629 | \ |
| 630 | static struct ftrace_event_call __used \ |
| 631 | __attribute__((__aligned__(4))) \ |
| 632 | __attribute__((section("_ftrace_events"))) event_##call = { \ |
| 633 | .name = #call, \ |
| 634 | .class = &event_class_##template, \ |
| 635 | .event.funcs = &ftrace_event_type_funcs_##template, \ |
| 636 | .print_fmt = print_fmt_##template, \ |
| 637 | }; |
| 638 | |
| 639 | #undef DEFINE_EVENT_PRINT |
| 640 | #define DEFINE_EVENT_PRINT(template, call, proto, args, print) \ |
| 641 | \ |
| 642 | static const char print_fmt_##call[] = print; \ |
| 643 | \ |
| 644 | static struct ftrace_event_call __used \ |
| 645 | __attribute__((__aligned__(4))) \ |
| 646 | __attribute__((section("_ftrace_events"))) event_##call = { \ |
| 647 | .name = #call, \ |
| 648 | .class = &event_class_##template, \ |
| 649 | .event.funcs = &ftrace_event_type_funcs_##call, \ |
| 650 | .print_fmt = print_fmt_##call, \ |
| 651 | } |
| 652 | |
| 653 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| 654 | |
| 655 | /* |
| 656 | * Define the insertion callback to perf events |
| 657 | * |
| 658 | * The job is very similar to ftrace_raw_event_<call> except that we don't |
| 659 | * insert in the ring buffer but in a perf counter. |
| 660 | * |
| 661 | * static void ftrace_perf_<call>(proto) |
| 662 | * { |
| 663 | * struct ftrace_data_offsets_<call> __maybe_unused __data_offsets; |
| 664 | * struct ftrace_event_call *event_call = &event_<call>; |
| 665 | * extern void perf_tp_event(int, u64, u64, void *, int); |
| 666 | * struct ftrace_raw_##call *entry; |
| 667 | * struct perf_trace_buf *trace_buf; |
| 668 | * u64 __addr = 0, __count = 1; |
| 669 | * unsigned long irq_flags; |
| 670 | * struct trace_entry *ent; |
| 671 | * int __entry_size; |
| 672 | * int __data_size; |
| 673 | * int __cpu |
| 674 | * int pc; |
| 675 | * |
| 676 | * pc = preempt_count(); |
| 677 | * |
| 678 | * __data_size = ftrace_get_offsets_<call>(&__data_offsets, args); |
| 679 | * |
| 680 | * // Below we want to get the aligned size by taking into account |
| 681 | * // the u32 field that will later store the buffer size |
| 682 | * __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32), |
| 683 | * sizeof(u64)); |
| 684 | * __entry_size -= sizeof(u32); |
| 685 | * |
| 686 | * // Protect the non nmi buffer |
| 687 | * // This also protects the rcu read side |
| 688 | * local_irq_save(irq_flags); |
| 689 | * __cpu = smp_processor_id(); |
| 690 | * |
| 691 | * if (in_nmi()) |
| 692 | * trace_buf = rcu_dereference_sched(perf_trace_buf_nmi); |
| 693 | * else |
| 694 | * trace_buf = rcu_dereference_sched(perf_trace_buf); |
| 695 | * |
| 696 | * if (!trace_buf) |
| 697 | * goto end; |
| 698 | * |
| 699 | * trace_buf = per_cpu_ptr(trace_buf, __cpu); |
| 700 | * |
| 701 | * // Avoid recursion from perf that could mess up the buffer |
| 702 | * if (trace_buf->recursion++) |
| 703 | * goto end_recursion; |
| 704 | * |
| 705 | * raw_data = trace_buf->buf; |
| 706 | * |
| 707 | * // Make recursion update visible before entering perf_tp_event |
| 708 | * // so that we protect from perf recursions. |
| 709 | * |
| 710 | * barrier(); |
| 711 | * |
| 712 | * //zero dead bytes from alignment to avoid stack leak to userspace: |
| 713 | * *(u64 *)(&raw_data[__entry_size - sizeof(u64)]) = 0ULL; |
| 714 | * entry = (struct ftrace_raw_<call> *)raw_data; |
| 715 | * ent = &entry->ent; |
| 716 | * tracing_generic_entry_update(ent, irq_flags, pc); |
| 717 | * ent->type = event_call->id; |
| 718 | * |
| 719 | * <tstruct> <- do some jobs with dynamic arrays |
| 720 | * |
| 721 | * <assign> <- affect our values |
| 722 | * |
| 723 | * perf_tp_event(event_call->id, __addr, __count, entry, |
| 724 | * __entry_size); <- submit them to perf counter |
| 725 | * |
| 726 | * } |
| 727 | */ |
| 728 | |
| 729 | #ifdef CONFIG_PERF_EVENTS |
| 730 | |
| 731 | #undef __entry |
| 732 | #define __entry entry |
| 733 | |
| 734 | #undef __get_dynamic_array |
| 735 | #define __get_dynamic_array(field) \ |
| 736 | ((void *)__entry + (__entry->__data_loc_##field & 0xffff)) |
| 737 | |
| 738 | #undef __get_str |
| 739 | #define __get_str(field) (char *)__get_dynamic_array(field) |
| 740 | |
| 741 | #undef __perf_addr |
| 742 | #define __perf_addr(a) __addr = (a) |
| 743 | |
| 744 | #undef __perf_count |
| 745 | #define __perf_count(c) __count = (c) |
| 746 | |
| 747 | #undef DECLARE_EVENT_CLASS |
| 748 | #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ |
| 749 | static notrace void \ |
| 750 | perf_trace_##call(void *__data, proto) \ |
| 751 | { \ |
| 752 | struct ftrace_event_call *event_call = __data; \ |
| 753 | struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\ |
| 754 | struct ftrace_raw_##call *entry; \ |
| 755 | struct pt_regs __regs; \ |
| 756 | u64 __addr = 0, __count = 1; \ |
| 757 | struct hlist_head *head; \ |
| 758 | int __entry_size; \ |
| 759 | int __data_size; \ |
| 760 | int rctx; \ |
| 761 | \ |
| 762 | perf_fetch_caller_regs(&__regs); \ |
| 763 | \ |
| 764 | __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \ |
| 765 | __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),\ |
| 766 | sizeof(u64)); \ |
| 767 | __entry_size -= sizeof(u32); \ |
| 768 | \ |
| 769 | if (WARN_ONCE(__entry_size > PERF_MAX_TRACE_SIZE, \ |
| 770 | "profile buffer not large enough")) \ |
| 771 | return; \ |
| 772 | \ |
| 773 | entry = (struct ftrace_raw_##call *)perf_trace_buf_prepare( \ |
| 774 | __entry_size, event_call->event.type, &__regs, &rctx); \ |
| 775 | if (!entry) \ |
| 776 | return; \ |
| 777 | \ |
| 778 | tstruct \ |
| 779 | \ |
| 780 | { assign; } \ |
| 781 | \ |
| 782 | head = this_cpu_ptr(event_call->perf_events); \ |
| 783 | perf_trace_buf_submit(entry, __entry_size, rctx, __addr, \ |
| 784 | __count, &__regs, head); \ |
| 785 | } |
| 786 | |
| 787 | /* |
| 788 | * This part is compiled out, it is only here as a build time check |
| 789 | * to make sure that if the tracepoint handling changes, the |
| 790 | * perf probe will fail to compile unless it too is updated. |
| 791 | */ |
| 792 | #undef DEFINE_EVENT |
| 793 | #define DEFINE_EVENT(template, call, proto, args) \ |
| 794 | static inline void perf_test_probe_##call(void) \ |
| 795 | { \ |
| 796 | check_trace_callback_type_##call(perf_trace_##template); \ |
| 797 | } |
| 798 | |
| 799 | |
| 800 | #undef DEFINE_EVENT_PRINT |
| 801 | #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ |
| 802 | DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) |
| 803 | |
| 804 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| 805 | #endif /* CONFIG_PERF_EVENTS */ |
| 806 | |
| 807 | #undef _TRACE_PROFILE_INIT |
| 808 | |