LXR linux/include/trace/ftrace.h

   1/*
   2 * Stage 1 of the trace events.
   3 *
   4 * Override the macros in <trace/trace_events.h> to include the following:
   5 *
   6 * struct ftrace_raw_<call> {
   7 *      struct trace_entry              ent;
   8 *      <type>                          <item>;
   9 *      <type2>                         <item2>[<len>];
  10 *      [...]
  11 * };
  12 *
  13 * The <type> <item> is created by the __field(type, item) macro or
  14 * the __array(type2, item2, len) macro.
  15 * We simply do "type item;", and that will create the fields
  16 * in the structure.
  17 */
  18
  19#include <linux/ftrace_event.h>
  20
  21/*
  22 * DECLARE_EVENT_CLASS can be used to add a generic function
  23 * handlers for events. That is, if all events have the same
  24 * parameters and just have distinct trace points.
  25 * Each tracepoint can be defined with DEFINE_EVENT and that
  26 * will map the DECLARE_EVENT_CLASS to the tracepoint.
  27 *
  28 * TRACE_EVENT is a one to one mapping between tracepoint and template.
  29 */
  30#undef TRACE_EVENT
  31#define TRACE_EVENT(name, proto, args, tstruct, assign, print) \
  32        DECLARE_EVENT_CLASS(name,                              \
  33                             PARAMS(proto),                    \
  34                             PARAMS(args),                     \
  35                             PARAMS(tstruct),                  \
  36                             PARAMS(assign),                   \
  37                             PARAMS(print));                   \
  38        DEFINE_EVENT(name, name, PARAMS(proto), PARAMS(args));
  39
  40
  41#undef __field
  42#define __field(type, item)             type    item;
  43
  44#undef __field_ext
  45#define __field_ext(type, item, filter_type)    type    item;
  46
  47#undef __array
  48#define __array(type, item, len)        type    item[len];
  49
  50#undef __dynamic_array
  51#define __dynamic_array(type, item, len) u32 __data_loc_##item;
  52
  53#undef __string
  54#define __string(item, src) __dynamic_array(char, item, -1)
  55
  56#undef TP_STRUCT__entry
  57#define TP_STRUCT__entry(args...) args
  58
  59#undef DECLARE_EVENT_CLASS
  60#define DECLARE_EVENT_CLASS(name, proto, args, tstruct, assign, print)  \
  61        struct ftrace_raw_##name {                                      \
  62                struct trace_entry      ent;                            \
  63                tstruct                                                 \
  64                char                    __data[0];                      \
  65        };                                                              \
  66                                                                        \
  67        static struct ftrace_event_class event_class_##name;
  68
  69#undef DEFINE_EVENT
  70#define DEFINE_EVENT(template, name, proto, args)       \
  71        static struct ftrace_event_call __used          \
  72        __attribute__((__aligned__(4))) event_##name
  73
  74#undef DEFINE_EVENT_PRINT
  75#define DEFINE_EVENT_PRINT(template, name, proto, args, print)  \
  76        DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
  77
  78/* Callbacks are meaningless to ftrace. */
  79#undef TRACE_EVENT_FN
  80#define TRACE_EVENT_FN(name, proto, args, tstruct,                      \
  81                assign, print, reg, unreg)                              \
  82        TRACE_EVENT(name, PARAMS(proto), PARAMS(args),                  \
  83                PARAMS(tstruct), PARAMS(assign), PARAMS(print))         \
  84
  85#undef TRACE_EVENT_FLAGS
  86#define TRACE_EVENT_FLAGS(name, value)                                  \
  87        __TRACE_EVENT_FLAGS(name, value)
  88
  89#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
  90
  91
  92/*
  93 * Stage 2 of the trace events.
  94 *
  95 * Include the following:
  96 *
  97 * struct ftrace_data_offsets_<call> {
  98 *      u32                             <item1>;
  99 *      u32                             <item2>;
 100 *      [...]
 101 * };
 102 *
 103 * The __dynamic_array() macro will create each u32 <item>, this is
 104 * to keep the offset of each array from the beginning of the event.
 105 * The size of an array is also encoded, in the higher 16 bits of <item>.
 106 */
 107
 108#undef __field
 109#define __field(type, item)
 110
 111#undef __field_ext
 112#define __field_ext(type, item, filter_type)
 113
 114#undef __array
 115#define __array(type, item, len)
 116
 117#undef __dynamic_array
 118#define __dynamic_array(type, item, len)        u32 item;
 119
 120#undef __string
 121#define __string(item, src) __dynamic_array(char, item, -1)
 122
 123#undef DECLARE_EVENT_CLASS
 124#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)  \
 125        struct ftrace_data_offsets_##call {                             \
 126                tstruct;                                                \
 127        };
 128
 129#undef DEFINE_EVENT
 130#define DEFINE_EVENT(template, name, proto, args)
 131
 132#undef DEFINE_EVENT_PRINT
 133#define DEFINE_EVENT_PRINT(template, name, proto, args, print)  \
 134        DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
 135
 136#undef TRACE_EVENT_FLAGS
 137#define TRACE_EVENT_FLAGS(event, flag)
 138
 139#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 140
 141/*
 142 * Stage 3 of the trace events.
 143 *
 144 * Override the macros in <trace/trace_events.h> to include the following:
 145 *
 146 * enum print_line_t
 147 * ftrace_raw_output_<call>(struct trace_iterator *iter, int flags)
 148 * {
 149 *      struct trace_seq *s = &iter->seq;
 150 *      struct ftrace_raw_<call> *field; <-- defined in stage 1
 151 *      struct trace_entry *entry;
 152 *      struct trace_seq *p = &iter->tmp_seq;
 153 *      int ret;
 154 *
 155 *      entry = iter->ent;
 156 *
 157 *      if (entry->type != event_<call>->event.type) {
 158 *              WARN_ON_ONCE(1);
 159 *              return TRACE_TYPE_UNHANDLED;
 160 *      }
 161 *
 162 *      field = (typeof(field))entry;
 163 *
 164 *      trace_seq_init(p);
 165 *      ret = trace_seq_printf(s, "%s: ", <call>);
 166 *      if (ret)
 167 *              ret = trace_seq_printf(s, <TP_printk> "\n");
 168 *      if (!ret)
 169 *              return TRACE_TYPE_PARTIAL_LINE;
 170 *
 171 *      return TRACE_TYPE_HANDLED;
 172 * }
 173 *
 174 * This is the method used to print the raw event to the trace
 175 * output format. Note, this is not needed if the data is read
 176 * in binary.
 177 */
 178
 179#undef __entry
 180#define __entry field
 181
 182#undef TP_printk
 183#define TP_printk(fmt, args...) fmt "\n", args
 184
 185#undef __get_dynamic_array
 186#define __get_dynamic_array(field)      \
 187                ((void *)__entry + (__entry->__data_loc_##field & 0xffff))
 188
 189#undef __get_str
 190#define __get_str(field) (char *)__get_dynamic_array(field)
 191
 192#undef __print_flags
 193#define __print_flags(flag, delim, flag_array...)                       \
 194        ({                                                              \
 195                static const struct trace_print_flags __flags[] =       \
 196                        { flag_array, { -1, NULL }};                    \
 197                ftrace_print_flags_seq(p, delim, flag, __flags);        \
 198        })
 199
 200#undef __print_symbolic
 201#define __print_symbolic(value, symbol_array...)                        \
 202        ({                                                              \
 203                static const struct trace_print_flags symbols[] =       \
 204                        { symbol_array, { -1, NULL }};                  \
 205                ftrace_print_symbols_seq(p, value, symbols);            \
 206        })
 207
 208#undef __print_symbolic_u64
 209#if BITS_PER_LONG == 32
 210#define __print_symbolic_u64(value, symbol_array...)                    \
 211        ({                                                              \
 212                static const struct trace_print_flags_u64 symbols[] =   \
 213                        { symbol_array, { -1, NULL } };                 \
 214                ftrace_print_symbols_seq_u64(p, value, symbols);        \
 215        })
 216#else
 217#define __print_symbolic_u64(value, symbol_array...)                    \
 218                        __print_symbolic(value, symbol_array)
 219#endif
 220
 221#undef __print_hex
 222#define __print_hex(buf, buf_len) ftrace_print_hex_seq(p, buf, buf_len)
 223
 224#undef DECLARE_EVENT_CLASS
 225#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)  \
 226static notrace enum print_line_t                                        \
 227ftrace_raw_output_##call(struct trace_iterator *iter, int flags,        \
 228                         struct trace_event *trace_event)               \
 229{                                                                       \
 230        struct trace_seq *s = &iter->seq;                               \
 231        struct trace_seq __maybe_unused *p = &iter->tmp_seq;            \
 232        struct ftrace_raw_##call *field;                                \
 233        int ret;                                                        \
 234                                                                        \
 235        field = (typeof(field))iter->ent;                               \
 236                                                                        \
 237        ret = ftrace_raw_output_prep(iter, trace_event);                \
 238        if (ret)                                                        \
 239                return ret;                                             \
 240                                                                        \
 241        ret = trace_seq_printf(s, print);                               \
 242        if (!ret)                                                       \
 243                return TRACE_TYPE_PARTIAL_LINE;                         \
 244                                                                        \
 245        return TRACE_TYPE_HANDLED;                                      \
 246}                                                                       \
 247static struct trace_event_functions ftrace_event_type_funcs_##call = {  \
 248        .trace                  = ftrace_raw_output_##call,             \
 249};
 250
 251#undef DEFINE_EVENT_PRINT
 252#define DEFINE_EVENT_PRINT(template, call, proto, args, print)          \
 253static notrace enum print_line_t                                        \
 254ftrace_raw_output_##call(struct trace_iterator *iter, int flags,        \
 255                         struct trace_event *event)                     \
 256{                                                                       \
 257        struct trace_seq *s = &iter->seq;                               \
 258        struct ftrace_raw_##template *field;                            \
 259        struct trace_entry *entry;                                      \
 260        struct trace_seq *p = &iter->tmp_seq;                           \
 261        int ret;                                                        \
 262                                                                        \
 263        entry = iter->ent;                                              \
 264                                                                        \
 265        if (entry->type != event_##call.event.type) {                   \
 266                WARN_ON_ONCE(1);                                        \
 267                return TRACE_TYPE_UNHANDLED;                            \
 268        }                                                               \
 269                                                                        \
 270        field = (typeof(field))entry;                                   \
 271                                                                        \
 272        trace_seq_init(p);                                              \
 273        ret = trace_seq_printf(s, "%s: ", #call);                       \
 274        if (ret)                                                        \
 275                ret = trace_seq_printf(s, print);                       \
 276        if (!ret)                                                       \
 277                return TRACE_TYPE_PARTIAL_LINE;                         \
 278                                                                        \
 279        return TRACE_TYPE_HANDLED;                                      \
 280}                                                                       \
 281static struct trace_event_functions ftrace_event_type_funcs_##call = {  \
 282        .trace                  = ftrace_raw_output_##call,             \
 283};
 284
 285#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 286
 287#undef __field_ext
 288#define __field_ext(type, item, filter_type)                            \
 289        ret = trace_define_field(event_call, #type, #item,              \
 290                                 offsetof(typeof(field), item),         \
 291                                 sizeof(field.item),                    \
 292                                 is_signed_type(type), filter_type);    \
 293        if (ret)                                                        \
 294                return ret;
 295
 296#undef __field
 297#define __field(type, item)     __field_ext(type, item, FILTER_OTHER)
 298
 299#undef __array
 300#define __array(type, item, len)                                        \
 301        do {                                                            \
 302                mutex_lock(&event_storage_mutex);                       \
 303                BUILD_BUG_ON(len > MAX_FILTER_STR_VAL);                 \
 304                snprintf(event_storage, sizeof(event_storage),          \
 305                         "%s[%d]", #type, len);                         \
 306                ret = trace_define_field(event_call, event_storage, #item, \
 307                                 offsetof(typeof(field), item),         \
 308                                 sizeof(field.item),                    \
 309                                 is_signed_type(type), FILTER_OTHER);   \
 310                mutex_unlock(&event_storage_mutex);                     \
 311                if (ret)                                                \
 312                        return ret;                                     \
 313        } while (0);
 314
 315#undef __dynamic_array
 316#define __dynamic_array(type, item, len)                                       \
 317        ret = trace_define_field(event_call, "__data_loc " #type "[]", #item,  \
 318                                 offsetof(typeof(field), __data_loc_##item),   \
 319                                 sizeof(field.__data_loc_##item),              \
 320                                 is_signed_type(type), FILTER_OTHER);
 321
 322#undef __string
 323#define __string(item, src) __dynamic_array(char, item, -1)
 324
 325#undef DECLARE_EVENT_CLASS
 326#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print)    \
 327static int notrace __init                                               \
 328ftrace_define_fields_##call(struct ftrace_event_call *event_call)       \
 329{                                                                       \
 330        struct ftrace_raw_##call field;                                 \
 331        int ret;                                                        \
 332                                                                        \
 333        tstruct;                                                        \
 334                                                                        \
 335        return ret;                                                     \
 336}
 337
 338#undef DEFINE_EVENT
 339#define DEFINE_EVENT(template, name, proto, args)
 340
 341#undef DEFINE_EVENT_PRINT
 342#define DEFINE_EVENT_PRINT(template, name, proto, args, print)  \
 343        DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
 344
 345#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 346
 347/*
 348 * remember the offset of each array from the beginning of the event.
 349 */
 350
 351#undef __entry
 352#define __entry entry
 353
 354#undef __field
 355#define __field(type, item)
 356
 357#undef __field_ext
 358#define __field_ext(type, item, filter_type)
 359
 360#undef __array
 361#define __array(type, item, len)
 362
 363#undef __dynamic_array
 364#define __dynamic_array(type, item, len)                                \
 365        __data_offsets->item = __data_size +                            \
 366                               offsetof(typeof(*entry), __data);        \
 367        __data_offsets->item |= (len * sizeof(type)) << 16;             \
 368        __data_size += (len) * sizeof(type);
 369
 370#undef __string
 371#define __string(item, src) __dynamic_array(char, item, strlen(src) + 1)
 372
 373#undef DECLARE_EVENT_CLASS
 374#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)  \
 375static inline notrace int ftrace_get_offsets_##call(                    \
 376        struct ftrace_data_offsets_##call *__data_offsets, proto)       \
 377{                                                                       \
 378        int __data_size = 0;                                            \
 379        struct ftrace_raw_##call __maybe_unused *entry;                 \
 380                                                                        \
 381        tstruct;                                                        \
 382                                                                        \
 383        return __data_size;                                             \
 384}
 385
 386#undef DEFINE_EVENT
 387#define DEFINE_EVENT(template, name, proto, args)
 388
 389#undef DEFINE_EVENT_PRINT
 390#define DEFINE_EVENT_PRINT(template, name, proto, args, print)  \
 391        DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
 392
 393#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 394
 395/*
 396 * Stage 4 of the trace events.
 397 *
 398 * Override the macros in <trace/trace_events.h> to include the following:
 399 *
 400 * For those macros defined with TRACE_EVENT:
 401 *
 402 * static struct ftrace_event_call event_<call>;
 403 *
 404 * static void ftrace_raw_event_<call>(void *__data, proto)
 405 * {
 406 *      struct ftrace_event_file *ftrace_file = __data;
 407 *      struct ftrace_event_call *event_call = ftrace_file->event_call;
 408 *      struct ftrace_data_offsets_<call> __maybe_unused __data_offsets;
 409 *      struct ring_buffer_event *event;
 410 *      struct ftrace_raw_<call> *entry; <-- defined in stage 1
 411 *      struct ring_buffer *buffer;
 412 *      unsigned long irq_flags;
 413 *      int __data_size;
 414 *      int pc;
 415 *
 416 *      if (test_bit(FTRACE_EVENT_FL_SOFT_DISABLED_BIT,
 417 *                   &ftrace_file->flags))
 418 *              return;
 419 *
 420 *      local_save_flags(irq_flags);
 421 *      pc = preempt_count();
 422 *
 423 *      __data_size = ftrace_get_offsets_<call>(&__data_offsets, args);
 424 *
 425 *      event = trace_event_buffer_lock_reserve(&buffer, ftrace_file,
 426 *                                event_<call>->event.type,
 427 *                                sizeof(*entry) + __data_size,
 428 *                                irq_flags, pc);
 429 *      if (!event)
 430 *              return;
 431 *      entry   = ring_buffer_event_data(event);
 432 *
 433 *      { <assign>; }  <-- Here we assign the entries by the __field and
 434 *                         __array macros.
 435 *
 436 *      if (!filter_current_check_discard(buffer, event_call, entry, event))
 437 *              trace_nowake_buffer_unlock_commit(buffer,
 438 *                                                 event, irq_flags, pc);
 439 * }
 440 *
 441 * static struct trace_event ftrace_event_type_<call> = {
 442 *      .trace                  = ftrace_raw_output_<call>, <-- stage 2
 443 * };
 444 *
 445 * static const char print_fmt_<call>[] = <TP_printk>;
 446 *
 447 * static struct ftrace_event_class __used event_class_<template> = {
 448 *      .system                 = "<system>",
 449 *      .define_fields          = ftrace_define_fields_<call>,
 450 *      .fields                 = LIST_HEAD_INIT(event_class_##call.fields),
 451 *      .raw_init               = trace_event_raw_init,
 452 *      .probe                  = ftrace_raw_event_##call,
 453 *      .reg                    = ftrace_event_reg,
 454 * };
 455 *
 456 * static struct ftrace_event_call event_<call> = {
 457 *      .name                   = "<call>",
 458 *      .class                  = event_class_<template>,
 459 *      .event                  = &ftrace_event_type_<call>,
 460 *      .print_fmt              = print_fmt_<call>,
 461 * };
 462 * // its only safe to use pointers when doing linker tricks to
 463 * // create an array.
 464 * static struct ftrace_event_call __used
 465 * __attribute__((section("_ftrace_events"))) *__event_<call> = &event_<call>;
 466 *
 467 */
 468
 469#ifdef CONFIG_PERF_EVENTS
 470
 471#define _TRACE_PERF_PROTO(call, proto)                                  \
 472        static notrace void                                             \
 473        perf_trace_##call(void *__data, proto);
 474
 475#define _TRACE_PERF_INIT(call)                                          \
 476        .perf_probe             = perf_trace_##call,
 477
 478#else
 479#define _TRACE_PERF_PROTO(call, proto)
 480#define _TRACE_PERF_INIT(call)
 481#endif /* CONFIG_PERF_EVENTS */
 482
 483#undef __entry
 484#define __entry entry
 485
 486#undef __field
 487#define __field(type, item)
 488
 489#undef __array
 490#define __array(type, item, len)
 491
 492#undef __dynamic_array
 493#define __dynamic_array(type, item, len)                                \
 494        __entry->__data_loc_##item = __data_offsets.item;
 495
 496#undef __string
 497#define __string(item, src) __dynamic_array(char, item, -1)             \
 498
 499#undef __assign_str
 500#define __assign_str(dst, src)                                          \
 501        strcpy(__get_str(dst), src);
 502
 503#undef TP_fast_assign
 504#define TP_fast_assign(args...) args
 505
 506#undef TP_perf_assign
 507#define TP_perf_assign(args...)
 508
 509#undef DECLARE_EVENT_CLASS
 510#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)  \
 511                                                                        \
 512static notrace void                                                     \
 513ftrace_raw_event_##call(void *__data, proto)                            \
 514{                                                                       \
 515        struct ftrace_event_file *ftrace_file = __data;                 \
 516        struct ftrace_event_call *event_call = ftrace_file->event_call; \
 517        struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
 518        struct ring_buffer_event *event;                                \
 519        struct ftrace_raw_##call *entry;                                \
 520        struct ring_buffer *buffer;                                     \
 521        unsigned long irq_flags;                                        \
 522        int __data_size;                                                \
 523        int pc;                                                         \
 524                                                                        \
 525        if (test_bit(FTRACE_EVENT_FL_SOFT_DISABLED_BIT,                 \
 526                     &ftrace_file->flags))                              \
 527                return;                                                 \
 528                                                                        \
 529        local_save_flags(irq_flags);                                    \
 530        pc = preempt_count();                                           \
 531                                                                        \
 532        __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
 533                                                                        \
 534        event = trace_event_buffer_lock_reserve(&buffer, ftrace_file,   \
 535                                 event_call->event.type,                \
 536                                 sizeof(*entry) + __data_size,          \
 537                                 irq_flags, pc);                        \
 538        if (!event)                                                     \
 539                return;                                                 \
 540        entry   = ring_buffer_event_data(event);                        \
 541                                                                        \
 542        tstruct                                                         \
 543                                                                        \
 544        { assign; }                                                     \
 545                                                                        \
 546        if (!filter_current_check_discard(buffer, event_call, entry, event)) \
 547                trace_buffer_unlock_commit(buffer, event, irq_flags, pc); \
 548}
 549/*
 550 * The ftrace_test_probe is compiled out, it is only here as a build time check
 551 * to make sure that if the tracepoint handling changes, the ftrace probe will
 552 * fail to compile unless it too is updated.
 553 */
 554
 555#undef DEFINE_EVENT
 556#define DEFINE_EVENT(template, call, proto, args)                       \
 557static inline void ftrace_test_probe_##call(void)                       \
 558{                                                                       \
 559        check_trace_callback_type_##call(ftrace_raw_event_##template);  \
 560}
 561
 562#undef DEFINE_EVENT_PRINT
 563#define DEFINE_EVENT_PRINT(template, name, proto, args, print)
 564
 565#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 566
 567#undef __entry
 568#define __entry REC
 569
 570#undef __print_flags
 571#undef __print_symbolic
 572#undef __print_hex
 573#undef __get_dynamic_array
 574#undef __get_str
 575
 576#undef TP_printk
 577#define TP_printk(fmt, args...) "\"" fmt "\", "  __stringify(args)
 578
 579#undef DECLARE_EVENT_CLASS
 580#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)  \
 581_TRACE_PERF_PROTO(call, PARAMS(proto));                                 \
 582static const char print_fmt_##call[] = print;                           \
 583static struct ftrace_event_class __used __refdata event_class_##call = { \
 584        .system                 = __stringify(TRACE_SYSTEM),            \
 585        .define_fields          = ftrace_define_fields_##call,          \
 586        .fields                 = LIST_HEAD_INIT(event_class_##call.fields),\
 587        .raw_init               = trace_event_raw_init,                 \
 588        .probe                  = ftrace_raw_event_##call,              \
 589        .reg                    = ftrace_event_reg,                     \
 590        _TRACE_PERF_INIT(call)                                          \
 591};
 592
 593#undef DEFINE_EVENT
 594#define DEFINE_EVENT(template, call, proto, args)                       \
 595                                                                        \
 596static struct ftrace_event_call __used event_##call = {                 \
 597        .name                   = #call,                                \
 598        .class                  = &event_class_##template,              \
 599        .event.funcs            = &ftrace_event_type_funcs_##template,  \
 600        .print_fmt              = print_fmt_##template,                 \
 601};                                                                      \
 602static struct ftrace_event_call __used                                  \
 603__attribute__((section("_ftrace_events"))) *__event_##call = &event_##call
 604
 605#undef DEFINE_EVENT_PRINT
 606#define DEFINE_EVENT_PRINT(template, call, proto, args, print)          \
 607                                                                        \
 608static const char print_fmt_##call[] = print;                           \
 609                                                                        \
 610static struct ftrace_event_call __used event_##call = {                 \
 611        .name                   = #call,                                \
 612        .class                  = &event_class_##template,              \
 613        .event.funcs            = &ftrace_event_type_funcs_##call,      \
 614        .print_fmt              = print_fmt_##call,                     \
 615};                                                                      \
 616static struct ftrace_event_call __used                                  \
 617__attribute__((section("_ftrace_events"))) *__event_##call = &event_##call
 618
 619#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 620
 621
 622#ifdef CONFIG_PERF_EVENTS
 623
 624#undef __entry
 625#define __entry entry
 626
 627#undef __get_dynamic_array
 628#define __get_dynamic_array(field)      \
 629                ((void *)__entry + (__entry->__data_loc_##field & 0xffff))
 630
 631#undef __get_str
 632#define __get_str(field) (char *)__get_dynamic_array(field)
 633
 634#undef __perf_addr
 635#define __perf_addr(a) __addr = (a)
 636
 637#undef __perf_count
 638#define __perf_count(c) __count = (c)
 639
 640#undef __perf_task
 641#define __perf_task(t) __task = (t)
 642
 643#undef TP_perf_assign
 644#define TP_perf_assign(args...) args
 645
 646#undef DECLARE_EVENT_CLASS
 647#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)  \
 648static notrace void                                                     \
 649perf_trace_##call(void *__data, proto)                                  \
 650{                                                                       \
 651        struct ftrace_event_call *event_call = __data;                  \
 652        struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
 653        struct ftrace_raw_##call *entry;                                \
 654        struct pt_regs __regs;                                          \
 655        u64 __addr = 0, __count = 1;                                    \
 656        struct task_struct *__task = NULL;                              \
 657        struct hlist_head *head;                                        \
 658        int __entry_size;                                               \
 659        int __data_size;                                                \
 660        int rctx;                                                       \
 661                                                                        \
 662        perf_fetch_caller_regs(&__regs);                                \
 663                                                                        \
 664        __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
 665        __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),\
 666                             sizeof(u64));                              \
 667        __entry_size -= sizeof(u32);                                    \
 668                                                                        \
 669        if (WARN_ONCE(__entry_size > PERF_MAX_TRACE_SIZE,               \
 670                      "profile buffer not large enough"))               \
 671                return;                                                 \
 672                                                                        \
 673        entry = (struct ftrace_raw_##call *)perf_trace_buf_prepare(     \
 674                __entry_size, event_call->event.type, &__regs, &rctx);  \
 675        if (!entry)                                                     \
 676                return;                                                 \
 677                                                                        \
 678        tstruct                                                         \
 679                                                                        \
 680        { assign; }                                                     \
 681                                                                        \
 682        head = this_cpu_ptr(event_call->perf_events);                   \
 683        perf_trace_buf_submit(entry, __entry_size, rctx, __addr,        \
 684                __count, &__regs, head, __task);                        \
 685}
 686
 687/*
 688 * This part is compiled out, it is only here as a build time check
 689 * to make sure that if the tracepoint handling changes, the
 690 * perf probe will fail to compile unless it too is updated.
 691 */
 692#undef DEFINE_EVENT
 693#define DEFINE_EVENT(template, call, proto, args)                       \
 694static inline void perf_test_probe_##call(void)                         \
 695{                                                                       \
 696        check_trace_callback_type_##call(perf_trace_##template);        \
 697}
 698
 699
 700#undef DEFINE_EVENT_PRINT
 701#define DEFINE_EVENT_PRINT(template, name, proto, args, print)  \
 702        DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
 703
 704#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 705#endif /* CONFIG_PERF_EVENTS */
 706
 707