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