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 __field_struct
  48 #define __field_struct(type, item)      type    item;
  49
  50 #undef __field_struct_ext
  51 #define __field_struct_ext(type, item, filter_type)     type    item;
  52
  53 #undef __array
  54 #define __array(type, item, len)        type    item[len];
  55
  56 #undef __dynamic_array
  57 #define __dynamic_array(type, item, len) u32 __data_loc_##item;
  58
  59 #undef __string
  60 #define __string(item, src) __dynamic_array(char, item, -1)
  61
  62 #undef __bitmask
  63 #define __bitmask(item, nr_bits) __dynamic_array(char, item, -1)
  64
  65 #undef TP_STRUCT__entry
  66 #define TP_STRUCT__entry(args...) args
  67
  68 #undef DECLARE_EVENT_CLASS
  69 #define DECLARE_EVENT_CLASS(name, proto, args, tstruct, assign, print)  \
  70         struct ftrace_raw_##name {                                      \
  71                 struct trace_entry      ent;                            \
  72                 tstruct                                                 \
  73                 char                    __data[0];                      \
  74         };                                                              \
  75                                                                         \
  76         static struct ftrace_event_class event_class_##name;
  77
  78 #undef DEFINE_EVENT
  79 #define DEFINE_EVENT(template, name, proto, args)       \
  80         static struct ftrace_event_call __used          \
  81         __attribute__((__aligned__(4))) event_##name
  82
  83 #undef DEFINE_EVENT_FN
  84 #define DEFINE_EVENT_FN(template, name, proto, args, reg, unreg)        \
  85         DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
  86
  87 #undef DEFINE_EVENT_PRINT
  88 #define DEFINE_EVENT_PRINT(template, name, proto, args, print)  \
  89         DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
  90
  91 /* Callbacks are meaningless to ftrace. */
  92 #undef TRACE_EVENT_FN
  93 #define TRACE_EVENT_FN(name, proto, args, tstruct,                      \
  94                 assign, print, reg, unreg)                              \
  95         TRACE_EVENT(name, PARAMS(proto), PARAMS(args),                  \
  96                 PARAMS(tstruct), PARAMS(assign), PARAMS(print))         \
  97
  98 #undef TRACE_EVENT_FLAGS
  99 #define TRACE_EVENT_FLAGS(name, value)                                  \
 100         __TRACE_EVENT_FLAGS(name, value)
 101
 102 #undef TRACE_EVENT_PERF_PERM
 103 #define TRACE_EVENT_PERF_PERM(name, expr...)                            \
 104         __TRACE_EVENT_PERF_PERM(name, expr)
 105
 106 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 107
 108
 109 /*
 110  * Stage 2 of the trace events.
 111  *
 112  * Include the following:
 113  *
 114  * struct ftrace_data_offsets_<call> {
 115  *      u32                             <item1>;
 116  *      u32                             <item2>;
 117  *      [...]
 118  * };
 119  *
 120  * The __dynamic_array() macro will create each u32 <item>, this is
 121  * to keep the offset of each array from the beginning of the event.
 122  * The size of an array is also encoded, in the higher 16 bits of <item>.
 123  */
 124
 125 #undef __field
 126 #define __field(type, item)
 127
 128 #undef __field_ext
 129 #define __field_ext(type, item, filter_type)
 130
 131 #undef __field_struct
 132 #define __field_struct(type, item)
 133
 134 #undef __field_struct_ext
 135 #define __field_struct_ext(type, item, filter_type)
 136
 137 #undef __array
 138 #define __array(type, item, len)
 139
 140 #undef __dynamic_array
 141 #define __dynamic_array(type, item, len)        u32 item;
 142
 143 #undef __string
 144 #define __string(item, src) __dynamic_array(char, item, -1)
 145
 146 #undef __bitmask
 147 #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1)
 148
 149 #undef DECLARE_EVENT_CLASS
 150 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)  \
 151         struct ftrace_data_offsets_##call {                             \
 152                 tstruct;                                                \
 153         };
 154
 155 #undef DEFINE_EVENT
 156 #define DEFINE_EVENT(template, name, proto, args)
 157
 158 #undef DEFINE_EVENT_PRINT
 159 #define DEFINE_EVENT_PRINT(template, name, proto, args, print)  \
 160         DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
 161
 162 #undef TRACE_EVENT_FLAGS
 163 #define TRACE_EVENT_FLAGS(event, flag)
 164
 165 #undef TRACE_EVENT_PERF_PERM
 166 #define TRACE_EVENT_PERF_PERM(event, expr...)
 167
 168 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 169
 170 /*
 171  * Stage 3 of the trace events.
 172  *
 173  * Override the macros in <trace/trace_events.h> to include the following:
 174  *
 175  * enum print_line_t
 176  * ftrace_raw_output_<call>(struct trace_iterator *iter, int flags)
 177  * {
 178  *      struct trace_seq *s = &iter->seq;
 179  *      struct ftrace_raw_<call> *field; <-- defined in stage 1
 180  *      struct trace_entry *entry;
 181  *      struct trace_seq *p = &iter->tmp_seq;
 182  *      int ret;
 183  *
 184  *      entry = iter->ent;
 185  *
 186  *      if (entry->type != event_<call>->event.type) {
 187  *              WARN_ON_ONCE(1);
 188  *              return TRACE_TYPE_UNHANDLED;
 189  *      }
 190  *
 191  *      field = (typeof(field))entry;
 192  *
 193  *      trace_seq_init(p);
 194  *      ret = trace_seq_printf(s, "%s: ", <call>);
 195  *      if (ret)
 196  *              ret = trace_seq_printf(s, <TP_printk> "\n");
 197  *      if (!ret)
 198  *              return TRACE_TYPE_PARTIAL_LINE;
 199  *
 200  *      return TRACE_TYPE_HANDLED;
 201  * }
 202  *
 203  * This is the method used to print the raw event to the trace
 204  * output format. Note, this is not needed if the data is read
 205  * in binary.
 206  */
 207
 208 #undef __entry
 209 #define __entry field
 210
 211 #undef TP_printk
 212 #define TP_printk(fmt, args...) fmt "\n", args
 213
 214 #undef __get_dynamic_array
 215 #define __get_dynamic_array(field)      \
 216                 ((void *)__entry + (__entry->__data_loc_##field & 0xffff))
 217
 218 #undef __get_dynamic_array_len
 219 #define __get_dynamic_array_len(field)  \
 220                 ((__entry->__data_loc_##field >> 16) & 0xffff)
 221
 222 #undef __get_str
 223 #define __get_str(field) (char *)__get_dynamic_array(field)
 224
 225 #undef __get_bitmask
 226 #define __get_bitmask(field)                                            \
 227         ({                                                              \
 228                 void *__bitmask = __get_dynamic_array(field);           \
 229                 unsigned int __bitmask_size;                            \
 230                 __bitmask_size = __get_dynamic_array_len(field);        \
 231                 ftrace_print_bitmask_seq(p, __bitmask, __bitmask_size); \
 232         })
 233
 234 #undef __print_flags
 235 #define __print_flags(flag, delim, flag_array...)                       \
 236         ({                                                              \
 237                 static const struct trace_print_flags __flags[] =       \
 238                         { flag_array, { -1, NULL }};                    \
 239                 ftrace_print_flags_seq(p, delim, flag, __flags);        \
 240         })
 241
 242 #undef __print_symbolic
 243 #define __print_symbolic(value, symbol_array...)                        \
 244         ({                                                              \
 245                 static const struct trace_print_flags symbols[] =       \
 246                         { symbol_array, { -1, NULL }};                  \
 247                 ftrace_print_symbols_seq(p, value, symbols);            \
 248         })
 249
 250 #undef __print_symbolic_u64
 251 #if BITS_PER_LONG == 32
 252 #define __print_symbolic_u64(value, symbol_array...)                    \
 253         ({                                                              \
 254                 static const struct trace_print_flags_u64 symbols[] =   \
 255                         { symbol_array, { -1, NULL } };                 \
 256                 ftrace_print_symbols_seq_u64(p, value, symbols);        \
 257         })
 258 #else
 259 #define __print_symbolic_u64(value, symbol_array...)                    \
 260                         __print_symbolic(value, symbol_array)
 261 #endif
 262
 263 #undef __print_hex
 264 #define __print_hex(buf, buf_len) ftrace_print_hex_seq(p, buf, buf_len)
 265
 266 #undef DECLARE_EVENT_CLASS
 267 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)  \
 268 static notrace enum print_line_t                                        \
 269 ftrace_raw_output_##call(struct trace_iterator *iter, int flags,        \
 270                          struct trace_event *trace_event)               \
 271 {                                                                       \
 272         struct trace_seq *s = &iter->seq;                               \
 273         struct trace_seq __maybe_unused *p = &iter->tmp_seq;            \
 274         struct ftrace_raw_##call *field;                                \
 275         int ret;                                                        \
 276                                                                         \
 277         field = (typeof(field))iter->ent;                               \
 278                                                                         \
 279         ret = ftrace_raw_output_prep(iter, trace_event);                \
 280         if (ret != TRACE_TYPE_HANDLED)                                  \
 281                 return ret;                                             \
 282                                                                         \
 283         trace_seq_printf(s, print);                                     \
 284                                                                         \
 285         return trace_handle_return(s);                                  \
 286 }                                                                       \
 287 static struct trace_event_functions ftrace_event_type_funcs_##call = {  \
 288         .trace                  = ftrace_raw_output_##call,             \
 289 };
 290
 291 #undef DEFINE_EVENT_PRINT
 292 #define DEFINE_EVENT_PRINT(template, call, proto, args, print)          \
 293 static notrace enum print_line_t                                        \
 294 ftrace_raw_output_##call(struct trace_iterator *iter, int flags,        \
 295                          struct trace_event *event)                     \
 296 {                                                                       \
 297         struct ftrace_raw_##template *field;                            \
 298         struct trace_entry *entry;                                      \
 299         struct trace_seq *p = &iter->tmp_seq;                           \
 300                                                                         \
 301         entry = iter->ent;                                              \
 302                                                                         \
 303         if (entry->type != event_##call.event.type) {                   \
 304                 WARN_ON_ONCE(1);                                        \
 305                 return TRACE_TYPE_UNHANDLED;                            \
 306         }                                                               \
 307                                                                         \
 308         field = (typeof(field))entry;                                   \
 309                                                                         \
 310         trace_seq_init(p);                                              \
 311         return ftrace_output_call(iter, #call, print);                  \
 312 }                                                                       \
 313 static struct trace_event_functions ftrace_event_type_funcs_##call = {  \
 314         .trace                  = ftrace_raw_output_##call,             \
 315 };
 316
 317 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 318
 319 #undef __field_ext
 320 #define __field_ext(type, item, filter_type)                            \
 321         ret = trace_define_field(event_call, #type, #item,              \
 322                                  offsetof(typeof(field), item),         \
 323                                  sizeof(field.item),                    \
 324                                  is_signed_type(type), filter_type);    \
 325         if (ret)                                                        \
 326                 return ret;
 327
 328 #undef __field_struct_ext
 329 #define __field_struct_ext(type, item, filter_type)                     \
 330         ret = trace_define_field(event_call, #type, #item,              \
 331                                  offsetof(typeof(field), item),         \
 332                                  sizeof(field.item),                    \
 333                                  0, filter_type);                       \
 334         if (ret)                                                        \
 335                 return ret;
 336
 337 #undef __field
 338 #define __field(type, item)     __field_ext(type, item, FILTER_OTHER)
 339
 340 #undef __field_struct
 341 #define __field_struct(type, item) __field_struct_ext(type, item, FILTER_OTHER)
 342
 343 #undef __array
 344 #define __array(type, item, len)                                        \
 345         do {                                                            \
 346                 char *type_str = #type"["__stringify(len)"]";           \
 347                 BUILD_BUG_ON(len > MAX_FILTER_STR_VAL);                 \
 348                 ret = trace_define_field(event_call, type_str, #item,   \
 349                                  offsetof(typeof(field), item),         \
 350                                  sizeof(field.item),                    \
 351                                  is_signed_type(type), FILTER_OTHER);   \
 352                 if (ret)                                                \
 353                         return ret;                                     \
 354         } while (0);
 355
 356 #undef __dynamic_array
 357 #define __dynamic_array(type, item, len)                                       \
 358         ret = trace_define_field(event_call, "__data_loc " #type "[]", #item,  \
 359                                  offsetof(typeof(field), __data_loc_##item),   \
 360                                  sizeof(field.__data_loc_##item),              \
 361                                  is_signed_type(type), FILTER_OTHER);
 362
 363 #undef __string
 364 #define __string(item, src) __dynamic_array(char, item, -1)
 365
 366 #undef __bitmask
 367 #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1)
 368
 369 #undef DECLARE_EVENT_CLASS
 370 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print)    \
 371 static int notrace __init                                               \
 372 ftrace_define_fields_##call(struct ftrace_event_call *event_call)       \
 373 {                                                                       \
 374         struct ftrace_raw_##call field;                                 \
 375         int ret;                                                        \
 376                                                                         \
 377         tstruct;                                                        \
 378                                                                         \
 379         return ret;                                                     \
 380 }
 381
 382 #undef DEFINE_EVENT
 383 #define DEFINE_EVENT(template, name, proto, args)
 384
 385 #undef DEFINE_EVENT_PRINT
 386 #define DEFINE_EVENT_PRINT(template, name, proto, args, print)  \
 387         DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
 388
 389 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 390
 391 /*
 392  * remember the offset of each array from the beginning of the event.
 393  */
 394
 395 #undef __entry
 396 #define __entry entry
 397
 398 #undef __field
 399 #define __field(type, item)
 400
 401 #undef __field_ext
 402 #define __field_ext(type, item, filter_type)
 403
 404 #undef __field_struct
 405 #define __field_struct(type, item)
 406
 407 #undef __field_struct_ext
 408 #define __field_struct_ext(type, item, filter_type)
 409
 410 #undef __array
 411 #define __array(type, item, len)
 412
 413 #undef __dynamic_array
 414 #define __dynamic_array(type, item, len)                                \
 415         __item_length = (len) * sizeof(type);                           \
 416         __data_offsets->item = __data_size +                            \
 417                                offsetof(typeof(*entry), __data);        \
 418         __data_offsets->item |= __item_length << 16;                    \
 419         __data_size += __item_length;
 420
 421 #undef __string
 422 #define __string(item, src) __dynamic_array(char, item,                 \
 423                     strlen((src) ? (const char *)(src) : "(null)") + 1)
 424
 425 /*
 426  * __bitmask_size_in_bytes_raw is the number of bytes needed to hold
 427  * num_possible_cpus().
 428  */
 429 #define __bitmask_size_in_bytes_raw(nr_bits)    \
 430         (((nr_bits) + 7) / 8)
 431
 432 #define __bitmask_size_in_longs(nr_bits)                        \
 433         ((__bitmask_size_in_bytes_raw(nr_bits) +                \
 434           ((BITS_PER_LONG / 8) - 1)) / (BITS_PER_LONG / 8))
 435
 436 /*
 437  * __bitmask_size_in_bytes is the number of bytes needed to hold
 438  * num_possible_cpus() padded out to the nearest long. This is what
 439  * is saved in the buffer, just to be consistent.
 440  */
 441 #define __bitmask_size_in_bytes(nr_bits)                                \
 442         (__bitmask_size_in_longs(nr_bits) * (BITS_PER_LONG / 8))
 443
 444 #undef __bitmask
 445 #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item,   \
 446                                          __bitmask_size_in_longs(nr_bits))
 447
 448 #undef DECLARE_EVENT_CLASS
 449 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)  \
 450 static inline notrace int ftrace_get_offsets_##call(                    \
 451         struct ftrace_data_offsets_##call *__data_offsets, proto)       \
 452 {                                                                       \
 453         int __data_size = 0;                                            \
 454         int __maybe_unused __item_length;                               \
 455         struct ftrace_raw_##call __maybe_unused *entry;                 \
 456                                                                         \
 457         tstruct;                                                        \
 458                                                                         \
 459         return __data_size;                                             \
 460 }
 461
 462 #undef DEFINE_EVENT
 463 #define DEFINE_EVENT(template, name, proto, args)
 464
 465 #undef DEFINE_EVENT_PRINT
 466 #define DEFINE_EVENT_PRINT(template, name, proto, args, print)  \
 467         DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
 468
 469 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 470
 471 /*
 472  * Stage 4 of the trace events.
 473  *
 474  * Override the macros in <trace/trace_events.h> to include the following:
 475  *
 476  * For those macros defined with TRACE_EVENT:
 477  *
 478  * static struct ftrace_event_call event_<call>;
 479  *
 480  * static void ftrace_raw_event_<call>(void *__data, proto)
 481  * {
 482  *      struct ftrace_event_file *ftrace_file = __data;
 483  *      struct ftrace_event_call *event_call = ftrace_file->event_call;
 484  *      struct ftrace_data_offsets_<call> __maybe_unused __data_offsets;
 485  *      unsigned long eflags = ftrace_file->flags;
 486  *      enum event_trigger_type __tt = ETT_NONE;
 487  *      struct ring_buffer_event *event;
 488  *      struct ftrace_raw_<call> *entry; <-- defined in stage 1
 489  *      struct ring_buffer *buffer;
 490  *      unsigned long irq_flags;
 491  *      int __data_size;
 492  *      int pc;
 493  *
 494  *      if (!(eflags & FTRACE_EVENT_FL_TRIGGER_COND)) {
 495  *              if (eflags & FTRACE_EVENT_FL_TRIGGER_MODE)
 496  *                      event_triggers_call(ftrace_file, NULL);
 497  *              if (eflags & FTRACE_EVENT_FL_SOFT_DISABLED)
 498  *                      return;
 499  *      }
 500  *
 501  *      local_save_flags(irq_flags);
 502  *      pc = preempt_count();
 503  *
 504  *      __data_size = ftrace_get_offsets_<call>(&__data_offsets, args);
 505  *
 506  *      event = trace_event_buffer_lock_reserve(&buffer, ftrace_file,
 507  *                                event_<call>->event.type,
 508  *                                sizeof(*entry) + __data_size,
 509  *                                irq_flags, pc);
 510  *      if (!event)
 511  *              return;
 512  *      entry   = ring_buffer_event_data(event);
 513  *
 514  *      { <assign>; }  <-- Here we assign the entries by the __field and
 515  *                         __array macros.
 516  *
 517  *      if (eflags & FTRACE_EVENT_FL_TRIGGER_COND)
 518  *              __tt = event_triggers_call(ftrace_file, entry);
 519  *
 520  *      if (test_bit(FTRACE_EVENT_FL_SOFT_DISABLED_BIT,
 521  *                   &ftrace_file->flags))
 522  *              ring_buffer_discard_commit(buffer, event);
 523  *      else if (!filter_check_discard(ftrace_file, entry, buffer, event))
 524  *              trace_buffer_unlock_commit(buffer, event, irq_flags, pc);
 525  *
 526  *      if (__tt)
 527  *              event_triggers_post_call(ftrace_file, __tt);
 528  * }
 529  *
 530  * static struct trace_event ftrace_event_type_<call> = {
 531  *      .trace                  = ftrace_raw_output_<call>, <-- stage 2
 532  * };
 533  *
 534  * static const char print_fmt_<call>[] = <TP_printk>;
 535  *
 536  * static struct ftrace_event_class __used event_class_<template> = {
 537  *      .system                 = "<system>",
 538  *      .define_fields          = ftrace_define_fields_<call>,
 539  *      .fields                 = LIST_HEAD_INIT(event_class_##call.fields),
 540  *      .raw_init               = trace_event_raw_init,
 541  *      .probe                  = ftrace_raw_event_##call,
 542  *      .reg                    = ftrace_event_reg,
 543  * };
 544  *
 545  * static struct ftrace_event_call event_<call> = {
 546  *      .class                  = event_class_<template>,
 547  *      {
 548  *              .tp                     = &__tracepoint_<call>,
 549  *      },
 550  *      .event                  = &ftrace_event_type_<call>,
 551  *      .print_fmt              = print_fmt_<call>,
 552  *      .flags                  = TRACE_EVENT_FL_TRACEPOINT,
 553  * };
 554  * // its only safe to use pointers when doing linker tricks to
 555  * // create an array.
 556  * static struct ftrace_event_call __used
 557  * __attribute__((section("_ftrace_events"))) *__event_<call> = &event_<call>;
 558  *
 559  */
 560
 561 #ifdef CONFIG_PERF_EVENTS
 562
 563 #define _TRACE_PERF_PROTO(call, proto)                                  \
 564         static notrace void                                             \
 565         perf_trace_##call(void *__data, proto);
 566
 567 #define _TRACE_PERF_INIT(call)                                          \
 568         .perf_probe             = perf_trace_##call,
 569
 570 #else
 571 #define _TRACE_PERF_PROTO(call, proto)
 572 #define _TRACE_PERF_INIT(call)
 573 #endif /* CONFIG_PERF_EVENTS */
 574
 575 #undef __entry
 576 #define __entry entry
 577
 578 #undef __field
 579 #define __field(type, item)
 580
 581 #undef __field_struct
 582 #define __field_struct(type, item)
 583
 584 #undef __array
 585 #define __array(type, item, len)
 586
 587 #undef __dynamic_array
 588 #define __dynamic_array(type, item, len)                                \
 589         __entry->__data_loc_##item = __data_offsets.item;
 590
 591 #undef __string
 592 #define __string(item, src) __dynamic_array(char, item, -1)
 593
 594 #undef __assign_str
 595 #define __assign_str(dst, src)                                          \
 596         strcpy(__get_str(dst), (src) ? (const char *)(src) : "(null)");
 597
 598 #undef __bitmask
 599 #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1)
 600
 601 #undef __get_bitmask
 602 #define __get_bitmask(field) (char *)__get_dynamic_array(field)
 603
 604 #undef __assign_bitmask
 605 #define __assign_bitmask(dst, src, nr_bits)                                     \
 606         memcpy(__get_bitmask(dst), (src), __bitmask_size_in_bytes(nr_bits))
 607
 608 #undef TP_fast_assign
 609 #define TP_fast_assign(args...) args
 610
 611 #undef __perf_addr
 612 #define __perf_addr(a)  (a)
 613
 614 #undef __perf_count
 615 #define __perf_count(c) (c)
 616
 617 #undef __perf_task
 618 #define __perf_task(t)  (t)
 619
 620 #undef DECLARE_EVENT_CLASS
 621 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)  \
 622                                                                         \
 623 static notrace void                                                     \
 624 ftrace_raw_event_##call(void *__data, proto)                            \
 625 {                                                                       \
 626         struct ftrace_event_file *ftrace_file = __data;                 \
 627         struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
 628         struct ftrace_event_buffer fbuffer;                             \
 629         struct ftrace_raw_##call *entry;                                \
 630         int __data_size;                                                \
 631                                                                         \
 632         if (ftrace_trigger_soft_disabled(ftrace_file))                  \
 633                 return;                                                 \
 634                                                                         \
 635         __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
 636                                                                         \
 637         entry = ftrace_event_buffer_reserve(&fbuffer, ftrace_file,      \
 638                                  sizeof(*entry) + __data_size);         \
 639                                                                         \
 640         if (!entry)                                                     \
 641                 return;                                                 \
 642                                                                         \
 643         tstruct                                                         \
 644                                                                         \
 645         { assign; }                                                     \
 646                                                                         \
 647         ftrace_event_buffer_commit(&fbuffer);                           \
 648 }
 649 /*
 650  * The ftrace_test_probe is compiled out, it is only here as a build time check
 651  * to make sure that if the tracepoint handling changes, the ftrace probe will
 652  * fail to compile unless it too is updated.
 653  */
 654
 655 #undef DEFINE_EVENT
 656 #define DEFINE_EVENT(template, call, proto, args)                       \
 657 static inline void ftrace_test_probe_##call(void)                       \
 658 {                                                                       \
 659         check_trace_callback_type_##call(ftrace_raw_event_##template);  \
 660 }
 661
 662 #undef DEFINE_EVENT_PRINT
 663 #define DEFINE_EVENT_PRINT(template, name, proto, args, print)
 664
 665 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 666
 667 #undef __entry
 668 #define __entry REC
 669
 670 #undef __print_flags
 671 #undef __print_symbolic
 672 #undef __print_hex
 673 #undef __get_dynamic_array
 674 #undef __get_dynamic_array_len
 675 #undef __get_str
 676 #undef __get_bitmask
 677
 678 #undef TP_printk
 679 #define TP_printk(fmt, args...) "\"" fmt "\", "  __stringify(args)
 680
 681 #undef DECLARE_EVENT_CLASS
 682 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)  \
 683 _TRACE_PERF_PROTO(call, PARAMS(proto));                                 \
 684 static const char print_fmt_##call[] = print;                           \
 685 static struct ftrace_event_class __used __refdata event_class_##call = { \
 686         .system                 = __stringify(TRACE_SYSTEM),            \
 687         .define_fields          = ftrace_define_fields_##call,          \
 688         .fields                 = LIST_HEAD_INIT(event_class_##call.fields),\
 689         .raw_init               = trace_event_raw_init,                 \
 690         .probe                  = ftrace_raw_event_##call,              \
 691         .reg                    = ftrace_event_reg,                     \
 692         _TRACE_PERF_INIT(call)                                          \
 693 };
 694
 695 #undef DEFINE_EVENT
 696 #define DEFINE_EVENT(template, call, proto, args)                       \
 697                                                                         \
 698 static struct ftrace_event_call __used event_##call = {                 \
 699         .class                  = &event_class_##template,              \
 700         {                                                               \
 701                 .tp                     = &__tracepoint_##call,         \
 702         },                                                              \
 703         .event.funcs            = &ftrace_event_type_funcs_##template,  \
 704         .print_fmt              = print_fmt_##template,                 \
 705         .flags                  = TRACE_EVENT_FL_TRACEPOINT,            \
 706 };                                                                      \
 707 static struct ftrace_event_call __used                                  \
 708 __attribute__((section("_ftrace_events"))) *__event_##call = &event_##call
 709
 710 #undef DEFINE_EVENT_PRINT
 711 #define DEFINE_EVENT_PRINT(template, call, proto, args, print)          \
 712                                                                         \
 713 static const char print_fmt_##call[] = print;                           \
 714                                                                         \
 715 static struct ftrace_event_call __used event_##call = {                 \
 716         .class                  = &event_class_##template,              \
 717         {                                                               \
 718                 .tp                     = &__tracepoint_##call,         \
 719         },                                                              \
 720         .event.funcs            = &ftrace_event_type_funcs_##call,      \
 721         .print_fmt              = print_fmt_##call,                     \
 722         .flags                  = TRACE_EVENT_FL_TRACEPOINT,            \
 723 };                                                                      \
 724 static struct ftrace_event_call __used                                  \
 725 __attribute__((section("_ftrace_events"))) *__event_##call = &event_##call
 726
 727 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 728
 729
 730 #ifdef CONFIG_PERF_EVENTS
 731
 732 #undef __entry
 733 #define __entry entry
 734
 735 #undef __get_dynamic_array
 736 #define __get_dynamic_array(field)      \
 737                 ((void *)__entry + (__entry->__data_loc_##field & 0xffff))
 738
 739 #undef __get_dynamic_array_len
 740 #define __get_dynamic_array_len(field)  \
 741                 ((__entry->__data_loc_##field >> 16) & 0xffff)
 742
 743 #undef __get_str
 744 #define __get_str(field) (char *)__get_dynamic_array(field)
 745
 746 #undef __get_bitmask
 747 #define __get_bitmask(field) (char *)__get_dynamic_array(field)
 748
 749 #undef __perf_addr
 750 #define __perf_addr(a)  (__addr = (a))
 751
 752 #undef __perf_count
 753 #define __perf_count(c) (__count = (c))
 754
 755 #undef __perf_task
 756 #define __perf_task(t)  (__task = (t))
 757
 758 #undef DECLARE_EVENT_CLASS
 759 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)  \
 760 static notrace void                                                     \
 761 perf_trace_##call(void *__data, proto)                                  \
 762 {                                                                       \
 763         struct ftrace_event_call *event_call = __data;                  \
 764         struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
 765         struct ftrace_raw_##call *entry;                                \
 766         struct pt_regs *__regs;                                         \
 767         u64 __addr = 0, __count = 1;                                    \
 768         struct task_struct *__task = NULL;                              \
 769         struct hlist_head *head;                                        \
 770         int __entry_size;                                               \
 771         int __data_size;                                                \
 772         int rctx;                                                       \
 773                                                                         \
 774         __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
 775                                                                         \
 776         head = this_cpu_ptr(event_call->perf_events);                   \
 777         if (__builtin_constant_p(!__task) && !__task &&                 \
 778                                 hlist_empty(head))                      \
 779                 return;                                                 \
 780                                                                         \
 781         __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),\
 782                              sizeof(u64));                              \
 783         __entry_size -= sizeof(u32);                                    \
 784                                                                         \
 785         entry = perf_trace_buf_prepare(__entry_size,                    \
 786                         event_call->event.type, &__regs, &rctx);        \
 787         if (!entry)                                                     \
 788                 return;                                                 \
 789                                                                         \
 790         perf_fetch_caller_regs(__regs);                                 \
 791                                                                         \
 792         tstruct                                                         \
 793                                                                         \
 794         { assign; }                                                     \
 795                                                                         \
 796         perf_trace_buf_submit(entry, __entry_size, rctx, __addr,        \
 797                 __count, __regs, head, __task);                         \
 798 }
 799
 800 /*
 801  * This part is compiled out, it is only here as a build time check
 802  * to make sure that if the tracepoint handling changes, the
 803  * perf probe will fail to compile unless it too is updated.
 804  */
 805 #undef DEFINE_EVENT
 806 #define DEFINE_EVENT(template, call, proto, args)                       \
 807 static inline void perf_test_probe_##call(void)                         \
 808 {                                                                       \
 809         check_trace_callback_type_##call(perf_trace_##template);        \
 810 }
 811
 812
 813 #undef DEFINE_EVENT_PRINT
 814 #define DEFINE_EVENT_PRINT(template, name, proto, args, print)  \
 815         DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
 816
 817 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 818 #endif /* CONFIG_PERF_EVENTS */
 819