LXR linux/include/trace/trace

   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 trace_event_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/trace_events.h>
  20
  21#ifndef TRACE_SYSTEM_VAR
  22#define TRACE_SYSTEM_VAR TRACE_SYSTEM
  23#endif
  24
  25#define __app__(x, y) str__##x##y
  26#define __app(x, y) __app__(x, y)
  27
  28#define TRACE_SYSTEM_STRING __app(TRACE_SYSTEM_VAR,__trace_system_name)
  29
  30#define TRACE_MAKE_SYSTEM_STR()                         \
  31        static const char TRACE_SYSTEM_STRING[] =       \
  32                __stringify(TRACE_SYSTEM)
  33
  34TRACE_MAKE_SYSTEM_STR();
  35
  36#undef TRACE_DEFINE_ENUM
  37#define TRACE_DEFINE_ENUM(a)                            \
  38        static struct trace_enum_map __used __initdata  \
  39        __##TRACE_SYSTEM##_##a =                        \
  40        {                                               \
  41                .system = TRACE_SYSTEM_STRING,          \
  42                .enum_string = #a,                      \
  43                .enum_value = a                         \
  44        };                                              \
  45        static struct trace_enum_map __used             \
  46        __attribute__((section("_ftrace_enum_map")))    \
  47        *TRACE_SYSTEM##_##a = &__##TRACE_SYSTEM##_##a
  48
  49/*
  50 * DECLARE_EVENT_CLASS can be used to add a generic function
  51 * handlers for events. That is, if all events have the same
  52 * parameters and just have distinct trace points.
  53 * Each tracepoint can be defined with DEFINE_EVENT and that
  54 * will map the DECLARE_EVENT_CLASS to the tracepoint.
  55 *
  56 * TRACE_EVENT is a one to one mapping between tracepoint and template.
  57 */
  58#undef TRACE_EVENT
  59#define TRACE_EVENT(name, proto, args, tstruct, assign, print) \
  60        DECLARE_EVENT_CLASS(name,                              \
  61                             PARAMS(proto),                    \
  62                             PARAMS(args),                     \
  63                             PARAMS(tstruct),                  \
  64                             PARAMS(assign),                   \
  65                             PARAMS(print));                   \
  66        DEFINE_EVENT(name, name, PARAMS(proto), PARAMS(args));
  67
  68
  69#undef __field
  70#define __field(type, item)             type    item;
  71
  72#undef __field_ext
  73#define __field_ext(type, item, filter_type)    type    item;
  74
  75#undef __field_struct
  76#define __field_struct(type, item)      type    item;
  77
  78#undef __field_struct_ext
  79#define __field_struct_ext(type, item, filter_type)     type    item;
  80
  81#undef __array
  82#define __array(type, item, len)        type    item[len];
  83
  84#undef __dynamic_array
  85#define __dynamic_array(type, item, len) u32 __data_loc_##item;
  86
  87#undef __string
  88#define __string(item, src) __dynamic_array(char, item, -1)
  89
  90#undef __bitmask
  91#define __bitmask(item, nr_bits) __dynamic_array(char, item, -1)
  92
  93#undef TP_STRUCT__entry
  94#define TP_STRUCT__entry(args...) args
  95
  96#undef DECLARE_EVENT_CLASS
  97#define DECLARE_EVENT_CLASS(name, proto, args, tstruct, assign, print)  \
  98        struct trace_event_raw_##name {                                 \
  99                struct trace_entry      ent;                            \
 100                tstruct                                                 \
 101                char                    __data[0];                      \
 102        };                                                              \
 103                                                                        \
 104        static struct trace_event_class event_class_##name;
 105
 106#undef DEFINE_EVENT
 107#define DEFINE_EVENT(template, name, proto, args)       \
 108        static struct trace_event_call  __used          \
 109        __attribute__((__aligned__(4))) event_##name
 110
 111#undef DEFINE_EVENT_FN
 112#define DEFINE_EVENT_FN(template, name, proto, args, reg, unreg)        \
 113        DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
 114
 115#undef DEFINE_EVENT_PRINT
 116#define DEFINE_EVENT_PRINT(template, name, proto, args, print)  \
 117        DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
 118
 119/* Callbacks are meaningless to ftrace. */
 120#undef TRACE_EVENT_FN
 121#define TRACE_EVENT_FN(name, proto, args, tstruct,                      \
 122                assign, print, reg, unreg)                              \
 123        TRACE_EVENT(name, PARAMS(proto), PARAMS(args),                  \
 124                PARAMS(tstruct), PARAMS(assign), PARAMS(print))         \
 125
 126#undef TRACE_EVENT_FN_COND
 127#define TRACE_EVENT_FN_COND(name, proto, args, cond, tstruct,   \
 128                assign, print, reg, unreg)                              \
 129        TRACE_EVENT_CONDITION(name, PARAMS(proto), PARAMS(args), PARAMS(cond),          \
 130                PARAMS(tstruct), PARAMS(assign), PARAMS(print))         \
 131
 132#undef TRACE_EVENT_FLAGS
 133#define TRACE_EVENT_FLAGS(name, value)                                  \
 134        __TRACE_EVENT_FLAGS(name, value)
 135
 136#undef TRACE_EVENT_PERF_PERM
 137#define TRACE_EVENT_PERF_PERM(name, expr...)                            \
 138        __TRACE_EVENT_PERF_PERM(name, expr)
 139
 140#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 141
 142/*
 143 * Stage 2 of the trace events.
 144 *
 145 * Include the following:
 146 *
 147 * struct trace_event_data_offsets_<call> {
 148 *      u32                             <item1>;
 149 *      u32                             <item2>;
 150 *      [...]
 151 * };
 152 *
 153 * The __dynamic_array() macro will create each u32 <item>, this is
 154 * to keep the offset of each array from the beginning of the event.
 155 * The size of an array is also encoded, in the higher 16 bits of <item>.
 156 */
 157
 158#undef TRACE_DEFINE_ENUM
 159#define TRACE_DEFINE_ENUM(a)
 160
 161#undef __field
 162#define __field(type, item)
 163
 164#undef __field_ext
 165#define __field_ext(type, item, filter_type)
 166
 167#undef __field_struct
 168#define __field_struct(type, item)
 169
 170#undef __field_struct_ext
 171#define __field_struct_ext(type, item, filter_type)
 172
 173#undef __array
 174#define __array(type, item, len)
 175
 176#undef __dynamic_array
 177#define __dynamic_array(type, item, len)        u32 item;
 178
 179#undef __string
 180#define __string(item, src) __dynamic_array(char, item, -1)
 181
 182#undef __bitmask
 183#define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1)
 184
 185#undef DECLARE_EVENT_CLASS
 186#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)  \
 187        struct trace_event_data_offsets_##call {                        \
 188                tstruct;                                                \
 189        };
 190
 191#undef DEFINE_EVENT
 192#define DEFINE_EVENT(template, name, proto, args)
 193
 194#undef DEFINE_EVENT_PRINT
 195#define DEFINE_EVENT_PRINT(template, name, proto, args, print)  \
 196        DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
 197
 198#undef TRACE_EVENT_FLAGS
 199#define TRACE_EVENT_FLAGS(event, flag)
 200
 201#undef TRACE_EVENT_PERF_PERM
 202#define TRACE_EVENT_PERF_PERM(event, expr...)
 203
 204#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 205
 206/*
 207 * Stage 3 of the trace events.
 208 *
 209 * Override the macros in <trace/trace_events.h> to include the following:
 210 *
 211 * enum print_line_t
 212 * trace_raw_output_<call>(struct trace_iterator *iter, int flags)
 213 * {
 214 *      struct trace_seq *s = &iter->seq;
 215 *      struct trace_event_raw_<call> *field; <-- defined in stage 1
 216 *      struct trace_entry *entry;
 217 *      struct trace_seq *p = &iter->tmp_seq;
 218 *      int ret;
 219 *
 220 *      entry = iter->ent;
 221 *
 222 *      if (entry->type != event_<call>->event.type) {
 223 *              WARN_ON_ONCE(1);
 224 *              return TRACE_TYPE_UNHANDLED;
 225 *      }
 226 *
 227 *      field = (typeof(field))entry;
 228 *
 229 *      trace_seq_init(p);
 230 *      ret = trace_seq_printf(s, "%s: ", <call>);
 231 *      if (ret)
 232 *              ret = trace_seq_printf(s, <TP_printk> "\n");
 233 *      if (!ret)
 234 *              return TRACE_TYPE_PARTIAL_LINE;
 235 *
 236 *      return TRACE_TYPE_HANDLED;
 237 * }
 238 *
 239 * This is the method used to print the raw event to the trace
 240 * output format. Note, this is not needed if the data is read
 241 * in binary.
 242 */
 243
 244#undef __entry
 245#define __entry field
 246
 247#undef TP_printk
 248#define TP_printk(fmt, args...) fmt "\n", args
 249
 250#undef __get_dynamic_array
 251#define __get_dynamic_array(field)      \
 252                ((void *)__entry + (__entry->__data_loc_##field & 0xffff))
 253
 254#undef __get_dynamic_array_len
 255#define __get_dynamic_array_len(field)  \
 256                ((__entry->__data_loc_##field >> 16) & 0xffff)
 257
 258#undef __get_str
 259#define __get_str(field) (char *)__get_dynamic_array(field)
 260
 261#undef __get_bitmask
 262#define __get_bitmask(field)                                            \
 263        ({                                                              \
 264                void *__bitmask = __get_dynamic_array(field);           \
 265                unsigned int __bitmask_size;                            \
 266                __bitmask_size = __get_dynamic_array_len(field);        \
 267                trace_print_bitmask_seq(p, __bitmask, __bitmask_size);  \
 268        })
 269
 270#undef __print_flags
 271#define __print_flags(flag, delim, flag_array...)                       \
 272        ({                                                              \
 273                static const struct trace_print_flags __flags[] =       \
 274                        { flag_array, { -1, NULL }};                    \
 275                trace_print_flags_seq(p, delim, flag, __flags); \
 276        })
 277
 278#undef __print_symbolic
 279#define __print_symbolic(value, symbol_array...)                        \
 280        ({                                                              \
 281                static const struct trace_print_flags symbols[] =       \
 282                        { symbol_array, { -1, NULL }};                  \
 283                trace_print_symbols_seq(p, value, symbols);             \
 284        })
 285
 286#undef __print_symbolic_u64
 287#if BITS_PER_LONG == 32
 288#define __print_symbolic_u64(value, symbol_array...)                    \
 289        ({                                                              \
 290                static const struct trace_print_flags_u64 symbols[] =   \
 291                        { symbol_array, { -1, NULL } };                 \
 292                trace_print_symbols_seq_u64(p, value, symbols); \
 293        })
 294#else
 295#define __print_symbolic_u64(value, symbol_array...)                    \
 296                        __print_symbolic(value, symbol_array)
 297#endif
 298
 299#undef __print_hex
 300#define __print_hex(buf, buf_len) trace_print_hex_seq(p, buf, buf_len)
 301
 302#undef __print_array
 303#define __print_array(array, count, el_size)                            \
 304        ({                                                              \
 305                BUILD_BUG_ON(el_size != 1 && el_size != 2 &&            \
 306                             el_size != 4 && el_size != 8);             \
 307                trace_print_array_seq(p, array, count, el_size);        \
 308        })
 309
 310#undef DECLARE_EVENT_CLASS
 311#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)  \
 312static notrace enum print_line_t                                        \
 313trace_raw_output_##call(struct trace_iterator *iter, int flags,         \
 314                        struct trace_event *trace_event)                \
 315{                                                                       \
 316        struct trace_seq *s = &iter->seq;                               \
 317        struct trace_seq __maybe_unused *p = &iter->tmp_seq;            \
 318        struct trace_event_raw_##call *field;                           \
 319        int ret;                                                        \
 320                                                                        \
 321        field = (typeof(field))iter->ent;                               \
 322                                                                        \
 323        ret = trace_raw_output_prep(iter, trace_event);                 \
 324        if (ret != TRACE_TYPE_HANDLED)                                  \
 325                return ret;                                             \
 326                                                                        \
 327        trace_seq_printf(s, print);                                     \
 328                                                                        \
 329        return trace_handle_return(s);                                  \
 330}                                                                       \
 331static struct trace_event_functions trace_event_type_funcs_##call = {   \
 332        .trace                  = trace_raw_output_##call,              \
 333};
 334
 335#undef DEFINE_EVENT_PRINT
 336#define DEFINE_EVENT_PRINT(template, call, proto, args, print)          \
 337static notrace enum print_line_t                                        \
 338trace_raw_output_##call(struct trace_iterator *iter, int flags,         \
 339                         struct trace_event *event)                     \
 340{                                                                       \
 341        struct trace_event_raw_##template *field;                       \
 342        struct trace_entry *entry;                                      \
 343        struct trace_seq *p = &iter->tmp_seq;                           \
 344                                                                        \
 345        entry = iter->ent;                                              \
 346                                                                        \
 347        if (entry->type != event_##call.event.type) {                   \
 348                WARN_ON_ONCE(1);                                        \
 349                return TRACE_TYPE_UNHANDLED;                            \
 350        }                                                               \
 351                                                                        \
 352        field = (typeof(field))entry;                                   \
 353                                                                        \
 354        trace_seq_init(p);                                              \
 355        return trace_output_call(iter, #call, print);                   \
 356}                                                                       \
 357static struct trace_event_functions trace_event_type_funcs_##call = {   \
 358        .trace                  = trace_raw_output_##call,              \
 359};
 360
 361#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 362
 363#undef __field_ext
 364#define __field_ext(type, item, filter_type)                            \
 365        ret = trace_define_field(event_call, #type, #item,              \
 366                                 offsetof(typeof(field), item),         \
 367                                 sizeof(field.item),                    \
 368                                 is_signed_type(type), filter_type);    \
 369        if (ret)                                                        \
 370                return ret;
 371
 372#undef __field_struct_ext
 373#define __field_struct_ext(type, item, filter_type)                     \
 374        ret = trace_define_field(event_call, #type, #item,              \
 375                                 offsetof(typeof(field), item),         \
 376                                 sizeof(field.item),                    \
 377                                 0, filter_type);                       \
 378        if (ret)                                                        \
 379                return ret;
 380
 381#undef __field
 382#define __field(type, item)     __field_ext(type, item, FILTER_OTHER)
 383
 384#undef __field_struct
 385#define __field_struct(type, item) __field_struct_ext(type, item, FILTER_OTHER)
 386
 387#undef __array
 388#define __array(type, item, len)                                        \
 389        do {                                                            \
 390                char *type_str = #type"["__stringify(len)"]";           \
 391                BUILD_BUG_ON(len > MAX_FILTER_STR_VAL);                 \
 392                ret = trace_define_field(event_call, type_str, #item,   \
 393                                 offsetof(typeof(field), item),         \
 394                                 sizeof(field.item),                    \
 395                                 is_signed_type(type), FILTER_OTHER);   \
 396                if (ret)                                                \
 397                        return ret;                                     \
 398        } while (0);
 399
 400#undef __dynamic_array
 401#define __dynamic_array(type, item, len)                                       \
 402        ret = trace_define_field(event_call, "__data_loc " #type "[]", #item,  \
 403                                 offsetof(typeof(field), __data_loc_##item),   \
 404                                 sizeof(field.__data_loc_##item),              \
 405                                 is_signed_type(type), FILTER_OTHER);
 406
 407#undef __string
 408#define __string(item, src) __dynamic_array(char, item, -1)
 409
 410#undef __bitmask
 411#define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1)
 412
 413#undef DECLARE_EVENT_CLASS
 414#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print)    \
 415static int notrace __init                                               \
 416trace_event_define_fields_##call(struct trace_event_call *event_call)   \
 417{                                                                       \
 418        struct trace_event_raw_##call field;                            \
 419        int ret;                                                        \
 420                                                                        \
 421        tstruct;                                                        \
 422                                                                        \
 423        return ret;                                                     \
 424}
 425
 426#undef DEFINE_EVENT
 427#define DEFINE_EVENT(template, name, proto, args)
 428
 429#undef DEFINE_EVENT_PRINT
 430#define DEFINE_EVENT_PRINT(template, name, proto, args, print)  \
 431        DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
 432
 433#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 434
 435/*
 436 * remember the offset of each array from the beginning of the event.
 437 */
 438
 439#undef __entry
 440#define __entry entry
 441
 442#undef __field
 443#define __field(type, item)
 444
 445#undef __field_ext
 446#define __field_ext(type, item, filter_type)
 447
 448#undef __field_struct
 449#define __field_struct(type, item)
 450
 451#undef __field_struct_ext
 452#define __field_struct_ext(type, item, filter_type)
 453
 454#undef __array
 455#define __array(type, item, len)
 456
 457#undef __dynamic_array
 458#define __dynamic_array(type, item, len)                                \
 459        __item_length = (len) * sizeof(type);                           \
 460        __data_offsets->item = __data_size +                            \
 461                               offsetof(typeof(*entry), __data);        \
 462        __data_offsets->item |= __item_length << 16;                    \
 463        __data_size += __item_length;
 464
 465#undef __string
 466#define __string(item, src) __dynamic_array(char, item,                 \
 467                    strlen((src) ? (const char *)(src) : "(null)") + 1)
 468
 469/*
 470 * __bitmask_size_in_bytes_raw is the number of bytes needed to hold
 471 * num_possible_cpus().
 472 */
 473#define __bitmask_size_in_bytes_raw(nr_bits)    \
 474        (((nr_bits) + 7) / 8)
 475
 476#define __bitmask_size_in_longs(nr_bits)                        \
 477        ((__bitmask_size_in_bytes_raw(nr_bits) +                \
 478          ((BITS_PER_LONG / 8) - 1)) / (BITS_PER_LONG / 8))
 479
 480/*
 481 * __bitmask_size_in_bytes is the number of bytes needed to hold
 482 * num_possible_cpus() padded out to the nearest long. This is what
 483 * is saved in the buffer, just to be consistent.
 484 */
 485#define __bitmask_size_in_bytes(nr_bits)                                \
 486        (__bitmask_size_in_longs(nr_bits) * (BITS_PER_LONG / 8))
 487
 488#undef __bitmask
 489#define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item,   \
 490                                         __bitmask_size_in_longs(nr_bits))
 491
 492#undef DECLARE_EVENT_CLASS
 493#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)  \
 494static inline notrace int trace_event_get_offsets_##call(               \
 495        struct trace_event_data_offsets_##call *__data_offsets, proto)  \
 496{                                                                       \
 497        int __data_size = 0;                                            \
 498        int __maybe_unused __item_length;                               \
 499        struct trace_event_raw_##call __maybe_unused *entry;            \
 500                                                                        \
 501        tstruct;                                                        \
 502                                                                        \
 503        return __data_size;                                             \
 504}
 505
 506#undef DEFINE_EVENT
 507#define DEFINE_EVENT(template, name, proto, args)
 508
 509#undef DEFINE_EVENT_PRINT
 510#define DEFINE_EVENT_PRINT(template, name, proto, args, print)  \
 511        DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
 512
 513#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 514
 515/*
 516 * Stage 4 of the trace events.
 517 *
 518 * Override the macros in <trace/trace_events.h> to include the following:
 519 *
 520 * For those macros defined with TRACE_EVENT:
 521 *
 522 * static struct trace_event_call event_<call>;
 523 *
 524 * static void trace_event_raw_event_<call>(void *__data, proto)
 525 * {
 526 *      struct trace_event_file *trace_file = __data;
 527 *      struct trace_event_call *event_call = trace_file->event_call;
 528 *      struct trace_event_data_offsets_<call> __maybe_unused __data_offsets;
 529 *      unsigned long eflags = trace_file->flags;
 530 *      enum event_trigger_type __tt = ETT_NONE;
 531 *      struct ring_buffer_event *event;
 532 *      struct trace_event_raw_<call> *entry; <-- defined in stage 1
 533 *      struct ring_buffer *buffer;
 534 *      unsigned long irq_flags;
 535 *      int __data_size;
 536 *      int pc;
 537 *
 538 *      if (!(eflags & EVENT_FILE_FL_TRIGGER_COND)) {
 539 *              if (eflags & EVENT_FILE_FL_TRIGGER_MODE)
 540 *                      event_triggers_call(trace_file, NULL);
 541 *              if (eflags & EVENT_FILE_FL_SOFT_DISABLED)
 542 *                      return;
 543 *      }
 544 *
 545 *      local_save_flags(irq_flags);
 546 *      pc = preempt_count();
 547 *
 548 *      __data_size = trace_event_get_offsets_<call>(&__data_offsets, args);
 549 *
 550 *      event = trace_event_buffer_lock_reserve(&buffer, trace_file,
 551 *                                event_<call>->event.type,
 552 *                                sizeof(*entry) + __data_size,
 553 *                                irq_flags, pc);
 554 *      if (!event)
 555 *              return;
 556 *      entry   = ring_buffer_event_data(event);
 557 *
 558 *      { <assign>; }  <-- Here we assign the entries by the __field and
 559 *                         __array macros.
 560 *
 561 *      if (eflags & EVENT_FILE_FL_TRIGGER_COND)
 562 *              __tt = event_triggers_call(trace_file, entry);
 563 *
 564 *      if (test_bit(EVENT_FILE_FL_SOFT_DISABLED_BIT,
 565 *                   &trace_file->flags))
 566 *              ring_buffer_discard_commit(buffer, event);
 567 *      else if (!filter_check_discard(trace_file, entry, buffer, event))
 568 *              trace_buffer_unlock_commit(buffer, event, irq_flags, pc);
 569 *
 570 *      if (__tt)
 571 *              event_triggers_post_call(trace_file, __tt);
 572 * }
 573 *
 574 * static struct trace_event ftrace_event_type_<call> = {
 575 *      .trace                  = trace_raw_output_<call>, <-- stage 2
 576 * };
 577 *
 578 * static char print_fmt_<call>[] = <TP_printk>;
 579 *
 580 * static struct trace_event_class __used event_class_<template> = {
 581 *      .system                 = "<system>",
 582 *      .define_fields          = trace_event_define_fields_<call>,
 583 *      .fields                 = LIST_HEAD_INIT(event_class_##call.fields),
 584 *      .raw_init               = trace_event_raw_init,
 585 *      .probe                  = trace_event_raw_event_##call,
 586 *      .reg                    = trace_event_reg,
 587 * };
 588 *
 589 * static struct trace_event_call event_<call> = {
 590 *      .class                  = event_class_<template>,
 591 *      {
 592 *              .tp                     = &__tracepoint_<call>,
 593 *      },
 594 *      .event                  = &ftrace_event_type_<call>,
 595 *      .print_fmt              = print_fmt_<call>,
 596 *      .flags                  = TRACE_EVENT_FL_TRACEPOINT,
 597 * };
 598 * // its only safe to use pointers when doing linker tricks to
 599 * // create an array.
 600 * static struct trace_event_call __used
 601 * __attribute__((section("_ftrace_events"))) *__event_<call> = &event_<call>;
 602 *
 603 */
 604
 605#ifdef CONFIG_PERF_EVENTS
 606
 607#define _TRACE_PERF_PROTO(call, proto)                                  \
 608        static notrace void                                             \
 609        perf_trace_##call(void *__data, proto);
 610
 611#define _TRACE_PERF_INIT(call)                                          \
 612        .perf_probe             = perf_trace_##call,
 613
 614#else
 615#define _TRACE_PERF_PROTO(call, proto)
 616#define _TRACE_PERF_INIT(call)
 617#endif /* CONFIG_PERF_EVENTS */
 618
 619#undef __entry
 620#define __entry entry
 621
 622#undef __field
 623#define __field(type, item)
 624
 625#undef __field_struct
 626#define __field_struct(type, item)
 627
 628#undef __array
 629#define __array(type, item, len)
 630
 631#undef __dynamic_array
 632#define __dynamic_array(type, item, len)                                \
 633        __entry->__data_loc_##item = __data_offsets.item;
 634
 635#undef __string
 636#define __string(item, src) __dynamic_array(char, item, -1)
 637
 638#undef __assign_str
 639#define __assign_str(dst, src)                                          \
 640        strcpy(__get_str(dst), (src) ? (const char *)(src) : "(null)");
 641
 642#undef __bitmask
 643#define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1)
 644
 645#undef __get_bitmask
 646#define __get_bitmask(field) (char *)__get_dynamic_array(field)
 647
 648#undef __assign_bitmask
 649#define __assign_bitmask(dst, src, nr_bits)                                     \
 650        memcpy(__get_bitmask(dst), (src), __bitmask_size_in_bytes(nr_bits))
 651
 652#undef TP_fast_assign
 653#define TP_fast_assign(args...) args
 654
 655#undef __perf_addr
 656#define __perf_addr(a)  (a)
 657
 658#undef __perf_count
 659#define __perf_count(c) (c)
 660
 661#undef __perf_task
 662#define __perf_task(t)  (t)
 663
 664#undef DECLARE_EVENT_CLASS
 665#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)  \
 666                                                                        \
 667static notrace void                                                     \
 668trace_event_raw_event_##call(void *__data, proto)                       \
 669{                                                                       \
 670        struct trace_event_file *trace_file = __data;                   \
 671        struct trace_event_data_offsets_##call __maybe_unused __data_offsets;\
 672        struct trace_event_buffer fbuffer;                              \
 673        struct trace_event_raw_##call *entry;                           \
 674        int __data_size;                                                \
 675                                                                        \
 676        if (trace_trigger_soft_disabled(trace_file))                    \
 677                return;                                                 \
 678                                                                        \
 679        __data_size = trace_event_get_offsets_##call(&__data_offsets, args); \
 680                                                                        \
 681        entry = trace_event_buffer_reserve(&fbuffer, trace_file,        \
 682                                 sizeof(*entry) + __data_size);         \
 683                                                                        \
 684        if (!entry)                                                     \
 685                return;                                                 \
 686                                                                        \
 687        tstruct                                                         \
 688                                                                        \
 689        { assign; }                                                     \
 690                                                                        \
 691        trace_event_buffer_commit(&fbuffer);                            \
 692}
 693/*
 694 * The ftrace_test_probe is compiled out, it is only here as a build time check
 695 * to make sure that if the tracepoint handling changes, the ftrace probe will
 696 * fail to compile unless it too is updated.
 697 */
 698
 699#undef DEFINE_EVENT
 700#define DEFINE_EVENT(template, call, proto, args)                       \
 701static inline void ftrace_test_probe_##call(void)                       \
 702{                                                                       \
 703        check_trace_callback_type_##call(trace_event_raw_event_##template); \
 704}
 705
 706#undef DEFINE_EVENT_PRINT
 707#define DEFINE_EVENT_PRINT(template, name, proto, args, print)
 708
 709#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 710
 711#undef __entry
 712#define __entry REC
 713
 714#undef __print_flags
 715#undef __print_symbolic
 716#undef __print_hex
 717#undef __get_dynamic_array
 718#undef __get_dynamic_array_len
 719#undef __get_str
 720#undef __get_bitmask
 721#undef __print_array
 722
 723#undef TP_printk
 724#define TP_printk(fmt, args...) "\"" fmt "\", "  __stringify(args)
 725
 726#undef DECLARE_EVENT_CLASS
 727#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)  \
 728_TRACE_PERF_PROTO(call, PARAMS(proto));                                 \
 729static char print_fmt_##call[] = print;                                 \
 730static struct trace_event_class __used __refdata event_class_##call = { \
 731        .system                 = TRACE_SYSTEM_STRING,                  \
 732        .define_fields          = trace_event_define_fields_##call,     \
 733        .fields                 = LIST_HEAD_INIT(event_class_##call.fields),\
 734        .raw_init               = trace_event_raw_init,                 \
 735        .probe                  = trace_event_raw_event_##call,         \
 736        .reg                    = trace_event_reg,                      \
 737        _TRACE_PERF_INIT(call)                                          \
 738};
 739
 740#undef DEFINE_EVENT
 741#define DEFINE_EVENT(template, call, proto, args)                       \
 742                                                                        \
 743static struct trace_event_call __used event_##call = {                  \
 744        .class                  = &event_class_##template,              \
 745        {                                                               \
 746                .tp                     = &__tracepoint_##call,         \
 747        },                                                              \
 748        .event.funcs            = &trace_event_type_funcs_##template,   \
 749        .print_fmt              = print_fmt_##template,                 \
 750        .flags                  = TRACE_EVENT_FL_TRACEPOINT,            \
 751};                                                                      \
 752static struct trace_event_call __used                                   \
 753__attribute__((section("_ftrace_events"))) *__event_##call = &event_##call
 754
 755#undef DEFINE_EVENT_PRINT
 756#define DEFINE_EVENT_PRINT(template, call, proto, args, print)          \
 757                                                                        \
 758static char print_fmt_##call[] = print;                                 \
 759                                                                        \
 760static struct trace_event_call __used event_##call = {                  \
 761        .class                  = &event_class_##template,              \
 762        {                                                               \
 763                .tp                     = &__tracepoint_##call,         \
 764        },                                                              \
 765        .event.funcs            = &trace_event_type_funcs_##call,       \
 766        .print_fmt              = print_fmt_##call,                     \
 767        .flags                  = TRACE_EVENT_FL_TRACEPOINT,            \
 768};                                                                      \
 769static struct trace_event_call __used                                   \
 770__attribute__((section("_ftrace_events"))) *__event_##call = &event_##call
 771
 772#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 773