include/trace/ftrace.h

   1 /*
   2  * Stage 1 of the trace events.
   3  *
   4  * Override the macros in <trace/trace_events.h> to include the following:
   5  *
   6  * struct ftrace_raw_<call> {
   7  *      struct trace_entry              ent;
   8  *      <type>                          <item>;
   9  *      <type2>                         <item2>[<len>];
  10  *      [...]
  11  * };
  12  *
  13  * The <type> <item> is created by the __field(type, item) macro or
  14  * the __array(type2, item2, len) macro.
  15  * We simply do "type item;", and that will create the fields
  16  * in the structure.
  17  */
  18
  19 #include <linux/ftrace_event.h>
  20
  21 /*
  22  * DECLARE_EVENT_CLASS can be used to add a generic function
  23  * handlers for events. That is, if all events have the same
  24  * parameters and just have distinct trace points.
  25  * Each tracepoint can be defined with DEFINE_EVENT and that
  26  * will map the DECLARE_EVENT_CLASS to the tracepoint.
  27  *
  28  * TRACE_EVENT is a one to one mapping between tracepoint and template.
  29  */
  30 #undef TRACE_EVENT
  31 #define TRACE_EVENT(name, proto, args, tstruct, assign, print) \
  32         DECLARE_EVENT_CLASS(name,                              \
  33                              PARAMS(proto),                    \
  34                              PARAMS(args),                     \
  35                              PARAMS(tstruct),                  \
  36                              PARAMS(assign),                   \
  37                              PARAMS(print));                   \
  38         DEFINE_EVENT(name, name, PARAMS(proto), PARAMS(args));
  39
  40
  41 #undef __field
  42 #define __field(type, item)             type    item;
  43
  44 #undef __field_ext
  45 #define __field_ext(type, item, filter_type)    type    item;
  46
  47 #undef __array
  48 #define __array(type, item, len)        type    item[len];
  49
  50 #undef __dynamic_array
  51 #define __dynamic_array(type, item, len) u32 __data_loc_##item;
  52
  53 #undef __string
  54 #define __string(item, src) __dynamic_array(char, item, -1)
  55
  56 #undef TP_STRUCT__entry
  57 #define TP_STRUCT__entry(args...) args
  58
  59 #undef DECLARE_EVENT_CLASS
  60 #define DECLARE_EVENT_CLASS(name, proto, args, tstruct, assign, print)  \
  61         struct ftrace_raw_##name {                                      \
  62                 struct trace_entry      ent;                            \
  63                 tstruct                                                 \
  64                 char                    __data[0];                      \
  65         };                                                              \
  66                                                                         \
  67         static struct ftrace_event_class event_class_##name;
  68
  69 #undef DEFINE_EVENT
  70 #define DEFINE_EVENT(template, name, proto, args)       \
  71         static struct ftrace_event_call __used          \
  72         __attribute__((__aligned__(4))) event_##name
  73
  74 #undef DEFINE_EVENT_FN
  75 #define DEFINE_EVENT_FN(template, name, proto, args, reg, unreg)        \
  76         DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
  77
  78 #undef DEFINE_EVENT_PRINT
  79 #define DEFINE_EVENT_PRINT(template, name, proto, args, print)  \
  80         DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
  81
  82 /* Callbacks are meaningless to ftrace. */
  83 #undef TRACE_EVENT_FN
  84 #define TRACE_EVENT_FN(name, proto, args, tstruct,                      \
  85                 assign, print, reg, unreg)                              \
  86         TRACE_EVENT(name, PARAMS(proto), PARAMS(args),                  \
  87                 PARAMS(tstruct), PARAMS(assign), PARAMS(print))         \
  88
  89 #undef TRACE_EVENT_FLAGS
  90 #define TRACE_EVENT_FLAGS(name, value)                                  \
  91         __TRACE_EVENT_FLAGS(name, value)
  92
  93 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
  94
  95
  96 /*
  97  * Stage 2 of the trace events.
  98  *
  99  * Include the following:
 100  *
 101  * struct ftrace_data_offsets_<call> {
 102  *      u32                             <item1>;
 103  *      u32                             <item2>;
 104  *      [...]
 105  * };
 106  *
 107  * The __dynamic_array() macro will create each u32 <item>, this is
 108  * to keep the offset of each array from the beginning of the event.
 109  * The size of an array is also encoded, in the higher 16 bits of <item>.
 110  */
 111
 112 #undef __field
 113 #define __field(type, item)
 114
 115 #undef __field_ext
 116 #define __field_ext(type, item, filter_type)
 117
 118 #undef __array
 119 #define __array(type, item, len)
 120
 121 #undef __dynamic_array
 122 #define __dynamic_array(type, item, len)        u32 item;
 123
 124 #undef __string
 125 #define __string(item, src) __dynamic_array(char, item, -1)
 126
 127 #undef DECLARE_EVENT_CLASS
 128 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)  \
 129         struct ftrace_data_offsets_##call {                             \
 130                 tstruct;                                                \
 131         };
 132
 133 #undef DEFINE_EVENT
 134 #define DEFINE_EVENT(template, name, proto, args)
 135
 136 #undef DEFINE_EVENT_PRINT
 137 #define DEFINE_EVENT_PRINT(template, name, proto, args, print)  \
 138         DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
 139
 140 #undef TRACE_EVENT_FLAGS
 141 #define TRACE_EVENT_FLAGS(event, flag)
 142
 143 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 144
 145 /*
 146  * Stage 3 of the trace events.
 147  *
 148  * Override the macros in <trace/trace_events.h> to include the following:
 149  *
 150  * enum print_line_t
 151  * ftrace_raw_output_<call>(struct trace_iterator *iter, int flags)
 152  * {
 153  *      struct trace_seq *s = &iter->seq;
 154  *      struct ftrace_raw_<call> *field; <-- defined in stage 1
 155  *      struct trace_entry *entry;
 156  *      struct trace_seq *p = &iter->tmp_seq;
 157  *      int ret;
 158  *
 159  *      entry = iter->ent;
 160  *
 161  *      if (entry->type != event_<call>->event.type) {
 162  *              WARN_ON_ONCE(1);
 163  *              return TRACE_TYPE_UNHANDLED;
 164  *      }
 165  *
 166  *      field = (typeof(field))entry;
 167  *
 168  *      trace_seq_init(p);
 169  *      ret = trace_seq_printf(s, "%s: ", <call>);
 170  *      if (ret)
 171  *              ret = trace_seq_printf(s, <TP_printk> "\n");
 172  *      if (!ret)
 173  *              return TRACE_TYPE_PARTIAL_LINE;
 174  *
 175  *      return TRACE_TYPE_HANDLED;
 176  * }
 177  *
 178  * This is the method used to print the raw event to the trace
 179  * output format. Note, this is not needed if the data is read
 180  * in binary.
 181  */
 182
 183 #undef __entry
 184 #define __entry field
 185
 186 #undef TP_printk
 187 #define TP_printk(fmt, args...) fmt "\n", args
 188
 189 #undef __get_dynamic_array
 190 #define __get_dynamic_array(field)      \
 191                 ((void *)__entry + (__entry->__data_loc_##field & 0xffff))
 192
 193 #undef __get_str
 194 #define __get_str(field) (char *)__get_dynamic_array(field)
 195
 196 #undef __print_flags
 197 #define __print_flags(flag, delim, flag_array...)                       \
 198         ({                                                              \
 199                 static const struct trace_print_flags __flags[] =       \
 200                         { flag_array, { -1, NULL }};                    \
 201                 ftrace_print_flags_seq(p, delim, flag, __flags);        \
 202         })
 203
 204 #undef __print_symbolic
 205 #define __print_symbolic(value, symbol_array...)                        \
 206         ({                                                              \
 207                 static const struct trace_print_flags symbols[] =       \
 208                         { symbol_array, { -1, NULL }};                  \
 209                 ftrace_print_symbols_seq(p, value, symbols);            \
 210         })
 211
 212 #undef __print_symbolic_u64
 213 #if BITS_PER_LONG == 32
 214 #define __print_symbolic_u64(value, symbol_array...)                    \
 215         ({                                                              \
 216                 static const struct trace_print_flags_u64 symbols[] =   \
 217                         { symbol_array, { -1, NULL } };                 \
 218                 ftrace_print_symbols_seq_u64(p, value, symbols);        \
 219         })
 220 #else
 221 #define __print_symbolic_u64(value, symbol_array...)                    \
 222                         __print_symbolic(value, symbol_array)
 223 #endif
 224
 225 #undef __print_hex
 226 #define __print_hex(buf, buf_len) ftrace_print_hex_seq(p, buf, buf_len)
 227
 228 #undef DECLARE_EVENT_CLASS
 229 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)  \
 230 static notrace enum print_line_t                                        \
 231 ftrace_raw_output_##call(struct trace_iterator *iter, int flags,        \
 232                          struct trace_event *trace_event)               \
 233 {                                                                       \
 234         struct trace_seq *s = &iter->seq;                               \
 235         struct trace_seq __maybe_unused *p = &iter->tmp_seq;            \
 236         struct ftrace_raw_##call *field;                                \
 237         int ret;                                                        \
 238                                                                         \
 239         field = (typeof(field))iter->ent;                               \
 240                                                                         \
 241         ret = ftrace_raw_output_prep(iter, trace_event);                \
 242         if (ret)                                                        \
 243                 return ret;                                             \
 244                                                                         \
 245         ret = trace_seq_printf(s, print);                               \
 246         if (!ret)                                                       \
 247                 return TRACE_TYPE_PARTIAL_LINE;                         \
 248                                                                         \
 249         return TRACE_TYPE_HANDLED;                                      \
 250 }                                                                       \
 251 static struct trace_event_functions ftrace_event_type_funcs_##call = {  \
 252         .trace                  = ftrace_raw_output_##call,             \
 253 };
 254
 255 #undef DEFINE_EVENT_PRINT
 256 #define DEFINE_EVENT_PRINT(template, call, proto, args, print)          \
 257 static notrace enum print_line_t                                        \
 258 ftrace_raw_output_##call(struct trace_iterator *iter, int flags,        \
 259                          struct trace_event *event)                     \
 260 {                                                                       \
 261         struct trace_seq *s = &iter->seq;                               \
 262         struct ftrace_raw_##template *field;                            \
 263         struct trace_entry *entry;                                      \
 264         struct trace_seq *p = &iter->tmp_seq;                           \
 265         int ret;                                                        \
 266                                                                         \
 267         entry = iter->ent;                                              \
 268                                                                         \
 269         if (entry->type != event_##call.event.type) {                   \
 270                 WARN_ON_ONCE(1);                                        \
 271                 return TRACE_TYPE_UNHANDLED;                            \
 272         }                                                               \
 273                                                                         \
 274         field = (typeof(field))entry;                                   \
 275                                                                         \
 276         trace_seq_init(p);                                              \
 277         ret = trace_seq_printf(s, "%s: ", #call);                       \
 278         if (ret)                                                        \
 279                 ret = trace_seq_printf(s, print);                       \
 280         if (!ret)                                                       \
 281                 return TRACE_TYPE_PARTIAL_LINE;                         \
 282                                                                         \
 283         return TRACE_TYPE_HANDLED;                                      \
 284 }                                                                       \
 285 static struct trace_event_functions ftrace_event_type_funcs_##call = {  \
 286         .trace                  = ftrace_raw_output_##call,             \
 287 };
 288
 289 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 290
 291 #undef __field_ext
 292 #define __field_ext(type, item, filter_type)                            \
 293         ret = trace_define_field(event_call, #type, #item,              \
 294                                  offsetof(typeof(field), item),         \
 295                                  sizeof(field.item),                    \
 296                                  is_signed_type(type), filter_type);    \
 297         if (ret)                                                        \
 298                 return ret;
 299
 300 #undef __field
 301 #define __field(type, item)     __field_ext(type, item, FILTER_OTHER)
 302
 303 #undef __array
 304 #define __array(type, item, len)                                        \
 305         do {                                                            \
 306                 char *type_str = #type"["__stringify(len)"]";           \
 307                 BUILD_BUG_ON(len > MAX_FILTER_STR_VAL);                 \
 308                 ret = trace_define_field(event_call, type_str, #item,   \
 309                                  offsetof(typeof(field), item),         \
 310                                  sizeof(field.item),                    \
 311                                  is_signed_type(type), FILTER_OTHER);   \
 312                 if (ret)                                                \
 313                         return ret;                                     \
 314         } while (0);
 315
 316 #undef __dynamic_array
 317 #define __dynamic_array(type, item, len)                                       \
 318         ret = trace_define_field(event_call, "__data_loc " #type "[]", #item,  \
 319                                  offsetof(typeof(field), __data_loc_##item),   \
 320                                  sizeof(field.__data_loc_##item),              \
 321                                  is_signed_type(type), FILTER_OTHER);
 322
 323 #undef __string
 324 #define __string(item, src) __dynamic_array(char, item, -1)
 325
 326 #undef DECLARE_EVENT_CLASS
 327 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print)    \
 328 static int notrace __init                                               \
 329 ftrace_define_fields_##call(struct ftrace_event_call *event_call)       \
 330 {                                                                       \
 331         struct ftrace_raw_##call field;                                 \
 332         int ret;                                                        \
 333                                                                         \
 334         tstruct;                                                        \
 335                                                                         \
 336         return ret;                                                     \
 337 }
 338
 339 #undef DEFINE_EVENT
 340 #define DEFINE_EVENT(template, name, proto, args)
 341
 342 #undef DEFINE_EVENT_PRINT
 343 #define DEFINE_EVENT_PRINT(template, name, proto, args, print)  \
 344         DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
 345
 346 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 347
 348 /*
 349  * remember the offset of each array from the beginning of the event.
 350  */
 351
 352 #undef __entry
 353 #define __entry entry
 354
 355 #undef __field
 356 #define __field(type, item)
 357
 358 #undef __field_ext
 359 #define __field_ext(type, item, filter_type)
 360
 361 #undef __array
 362 #define __array(type, item, len)
 363
 364 #undef __dynamic_array
 365 #define __dynamic_array(type, item, len)                                \
 366         __data_offsets->item = __data_size +                            \
 367                                offsetof(typeof(*entry), __data);        \
 368         __data_offsets->item |= (len * sizeof(type)) << 16;             \
 369         __data_size += (len) * sizeof(type);
 370
 371 #undef __string
 372 #define __string(item, src) __dynamic_array(char, item,                 \
 373                     strlen((src) ? (const char *)(src) : "(null)") + 1)
 374
 375 #undef DECLARE_EVENT_CLASS
 376 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)  \
 377 static inline notrace int ftrace_get_offsets_##call(                    \
 378         struct ftrace_data_offsets_##call *__data_offsets, proto)       \
 379 {                                                                       \
 380         int __data_size = 0;                                            \
 381         struct ftrace_raw_##call __maybe_unused *entry;                 \
 382                                                                         \
 383         tstruct;                                                        \
 384                                                                         \
 385         return __data_size;                                             \
 386 }
 387
 388 #undef DEFINE_EVENT
 389 #define DEFINE_EVENT(template, name, proto, args)
 390
 391 #undef DEFINE_EVENT_PRINT
 392 #define DEFINE_EVENT_PRINT(template, name, proto, args, print)  \
 393         DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
 394
 395 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 396
 397 /*
 398  * Stage 4 of the trace events.
 399  *
 400  * Override the macros in <trace/trace_events.h> to include the following:
 401  *
 402  * For those macros defined with TRACE_EVENT:
 403  *
 404  * static struct ftrace_event_call event_<call>;
 405  *
 406  * static void ftrace_raw_event_<call>(void *__data, proto)
 407  * {
 408  *      struct ftrace_event_file *ftrace_file = __data;
 409  *      struct ftrace_event_call *event_call = ftrace_file->event_call;
 410  *      struct ftrace_data_offsets_<call> __maybe_unused __data_offsets;
 411  *      struct ring_buffer_event *event;
 412  *      struct ftrace_raw_<call> *entry; <-- defined in stage 1
 413  *      struct ring_buffer *buffer;
 414  *      unsigned long irq_flags;
 415  *      int __data_size;
 416  *      int pc;
 417  *
 418  *      if (test_bit(FTRACE_EVENT_FL_SOFT_DISABLED_BIT,
 419  *                   &ftrace_file->flags))
 420  *              return;
 421  *
 422  *      local_save_flags(irq_flags);
 423  *      pc = preempt_count();
 424  *
 425  *      __data_size = ftrace_get_offsets_<call>(&__data_offsets, args);
 426  *
 427  *      event = trace_event_buffer_lock_reserve(&buffer, ftrace_file,
 428  *                                event_<call>->event.type,
 429  *                                sizeof(*entry) + __data_size,
 430  *                                irq_flags, pc);
 431  *      if (!event)
 432  *              return;
 433  *      entry   = ring_buffer_event_data(event);
 434  *
 435  *      { <assign>; }  <-- Here we assign the entries by the __field and
 436  *                         __array macros.
 437  *
 438  *      if (!filter_current_check_discard(buffer, event_call, entry, event))
 439  *              trace_nowake_buffer_unlock_commit(buffer,
 440  *                                                 event, irq_flags, pc);
 441  * }
 442  *
 443  * static struct trace_event ftrace_event_type_<call> = {
 444  *      .trace                  = ftrace_raw_output_<call>, <-- stage 2
 445  * };
 446  *
 447  * static const char print_fmt_<call>[] = <TP_printk>;
 448  *
 449  * static struct ftrace_event_class __used event_class_<template> = {
 450  *      .system                 = "<system>",
 451  *      .define_fields          = ftrace_define_fields_<call>,
 452  *      .fields                 = LIST_HEAD_INIT(event_class_##call.fields),
 453  *      .raw_init               = trace_event_raw_init,
 454  *      .probe                  = ftrace_raw_event_##call,
 455  *      .reg                    = ftrace_event_reg,
 456  * };
 457  *
 458  * static struct ftrace_event_call event_<call> = {
 459  *      .name                   = "<call>",
 460  *      .class                  = event_class_<template>,
 461  *      .event                  = &ftrace_event_type_<call>,
 462  *      .print_fmt              = print_fmt_<call>,
 463  * };
 464  * // its only safe to use pointers when doing linker tricks to
 465  * // create an array.
 466  * static struct ftrace_event_call __used
 467  * __attribute__((section("_ftrace_events"))) *__event_<call> = &event_<call>;
 468  *
 469  */
 470
 471 #ifdef CONFIG_PERF_EVENTS
 472
 473 #define _TRACE_PERF_PROTO(call, proto)                                  \
 474         static notrace void                                             \
 475         perf_trace_##call(void *__data, proto);
 476
 477 #define _TRACE_PERF_INIT(call)                                          \
 478         .perf_probe             = perf_trace_##call,
 479
 480 #else
 481 #define _TRACE_PERF_PROTO(call, proto)
 482 #define _TRACE_PERF_INIT(call)
 483 #endif /* CONFIG_PERF_EVENTS */
 484
 485 #undef __entry
 486 #define __entry entry
 487
 488 #undef __field
 489 #define __field(type, item)
 490
 491 #undef __array
 492 #define __array(type, item, len)
 493
 494 #undef __dynamic_array
 495 #define __dynamic_array(type, item, len)                                \
 496         __entry->__data_loc_##item = __data_offsets.item;
 497
 498 #undef __string
 499 #define __string(item, src) __dynamic_array(char, item, -1)             \
 500
 501 #undef __assign_str
 502 #define __assign_str(dst, src)                                          \
 503         strcpy(__get_str(dst), (src) ? (const char *)(src) : "(null)");
 504
 505 #undef TP_fast_assign
 506 #define TP_fast_assign(args...) args
 507
 508 #undef __perf_addr
 509 #define __perf_addr(a)  (a)
 510
 511 #undef __perf_count
 512 #define __perf_count(c) (c)
 513
 514 #undef __perf_task
 515 #define __perf_task(t)  (t)
 516
 517 #undef DECLARE_EVENT_CLASS
 518 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)  \
 519                                                                         \
 520 static notrace void                                                     \
 521 ftrace_raw_event_##call(void *__data, proto)                            \
 522 {                                                                       \
 523         struct ftrace_event_file *ftrace_file = __data;                 \
 524         struct ftrace_event_call *event_call = ftrace_file->event_call; \
 525         struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
 526         struct ring_buffer_event *event;                                \
 527         struct ftrace_raw_##call *entry;                                \
 528         struct ring_buffer *buffer;                                     \
 529         unsigned long irq_flags;                                        \
 530         int __data_size;                                                \
 531         int pc;                                                         \
 532                                                                         \
 533         if (test_bit(FTRACE_EVENT_FL_SOFT_DISABLED_BIT,                 \
 534                      &ftrace_file->flags))                              \
 535                 return;                                                 \
 536                                                                         \
 537         local_save_flags(irq_flags);                                    \
 538         pc = preempt_count();                                           \
 539                                                                         \
 540         __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
 541                                                                         \
 542         event = trace_event_buffer_lock_reserve(&buffer, ftrace_file,   \
 543                                  event_call->event.type,                \
 544                                  sizeof(*entry) + __data_size,          \
 545                                  irq_flags, pc);                        \
 546         if (!event)                                                     \
 547                 return;                                                 \
 548         entry   = ring_buffer_event_data(event);                        \
 549                                                                         \
 550         tstruct                                                         \
 551                                                                         \
 552         { assign; }                                                     \
 553                                                                         \
 554         if (!filter_current_check_discard(buffer, event_call, entry, event)) \
 555                 trace_buffer_unlock_commit(buffer, event, irq_flags, pc); \
 556 }
 557 /*
 558  * The ftrace_test_probe is compiled out, it is only here as a build time check
 559  * to make sure that if the tracepoint handling changes, the ftrace probe will
 560  * fail to compile unless it too is updated.
 561  */
 562
 563 #undef DEFINE_EVENT
 564 #define DEFINE_EVENT(template, call, proto, args)                       \
 565 static inline void ftrace_test_probe_##call(void)                       \
 566 {                                                                       \
 567         check_trace_callback_type_##call(ftrace_raw_event_##template);  \
 568 }
 569
 570 #undef DEFINE_EVENT_PRINT
 571 #define DEFINE_EVENT_PRINT(template, name, proto, args, print)
 572
 573 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 574
 575 #undef __entry
 576 #define __entry REC
 577
 578 #undef __print_flags
 579 #undef __print_symbolic
 580 #undef __print_hex
 581 #undef __get_dynamic_array
 582 #undef __get_str
 583
 584 #undef TP_printk
 585 #define TP_printk(fmt, args...) "\"" fmt "\", "  __stringify(args)
 586
 587 #undef DECLARE_EVENT_CLASS
 588 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)  \
 589 _TRACE_PERF_PROTO(call, PARAMS(proto));                                 \
 590 static const char print_fmt_##call[] = print;                           \
 591 static struct ftrace_event_class __used __refdata event_class_##call = { \
 592         .system                 = __stringify(TRACE_SYSTEM),            \
 593         .define_fields          = ftrace_define_fields_##call,          \
 594         .fields                 = LIST_HEAD_INIT(event_class_##call.fields),\
 595         .raw_init               = trace_event_raw_init,                 \
 596         .probe                  = ftrace_raw_event_##call,              \
 597         .reg                    = ftrace_event_reg,                     \
 598         _TRACE_PERF_INIT(call)                                          \
 599 };
 600
 601 #undef DEFINE_EVENT
 602 #define DEFINE_EVENT(template, call, proto, args)                       \
 603                                                                         \
 604 static struct ftrace_event_call __used event_##call = {                 \
 605         .name                   = #call,                                \
 606         .class                  = &event_class_##template,              \
 607         .event.funcs            = &ftrace_event_type_funcs_##template,  \
 608         .print_fmt              = print_fmt_##template,                 \
 609 };                                                                      \
 610 static struct ftrace_event_call __used                                  \
 611 __attribute__((section("_ftrace_events"))) *__event_##call = &event_##call
 612
 613 #undef DEFINE_EVENT_PRINT
 614 #define DEFINE_EVENT_PRINT(template, call, proto, args, print)          \
 615                                                                         \
 616 static const char print_fmt_##call[] = print;                           \
 617                                                                         \
 618 static struct ftrace_event_call __used event_##call = {                 \
 619         .name                   = #call,                                \
 620         .class                  = &event_class_##template,              \
 621         .event.funcs            = &ftrace_event_type_funcs_##call,      \
 622         .print_fmt              = print_fmt_##call,                     \
 623 };                                                                      \
 624 static struct ftrace_event_call __used                                  \
 625 __attribute__((section("_ftrace_events"))) *__event_##call = &event_##call
 626
 627 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 628
 629
 630 #ifdef CONFIG_PERF_EVENTS
 631
 632 #undef __entry
 633 #define __entry entry
 634
 635 #undef __get_dynamic_array
 636 #define __get_dynamic_array(field)      \
 637                 ((void *)__entry + (__entry->__data_loc_##field & 0xffff))
 638
 639 #undef __get_str
 640 #define __get_str(field) (char *)__get_dynamic_array(field)
 641
 642 #undef __perf_addr
 643 #define __perf_addr(a)  (__addr = (a))
 644
 645 #undef __perf_count
 646 #define __perf_count(c) (__count = (c))
 647
 648 #undef __perf_task
 649 #define __perf_task(t)  (__task = (t))
 650
 651 #undef DECLARE_EVENT_CLASS
 652 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)  \
 653 static notrace void                                                     \
 654 perf_trace_##call(void *__data, proto)                                  \
 655 {                                                                       \
 656         struct ftrace_event_call *event_call = __data;                  \
 657         struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
 658         struct ftrace_raw_##call *entry;                                \
 659         struct pt_regs __regs;                                          \
 660         u64 __addr = 0, __count = 1;                                    \
 661         struct task_struct *__task = NULL;                              \
 662         struct hlist_head *head;                                        \
 663         int __entry_size;                                               \
 664         int __data_size;                                                \
 665         int rctx;                                                       \
 666                                                                         \
 667         __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
 668                                                                         \
 669         head = this_cpu_ptr(event_call->perf_events);                   \
 670         if (__builtin_constant_p(!__task) && !__task &&                 \
 671                                 hlist_empty(head))                      \
 672                 return;                                                 \
 673                                                                         \
 674         __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),\
 675                              sizeof(u64));                              \
 676         __entry_size -= sizeof(u32);                                    \
 677                                                                         \
 678         perf_fetch_caller_regs(&__regs);                                \
 679         entry = perf_trace_buf_prepare(__entry_size,                    \
 680                         event_call->event.type, &__regs, &rctx);        \
 681         if (!entry)                                                     \
 682                 return;                                                 \
 683                                                                         \
 684         tstruct                                                         \
 685                                                                         \
 686         { assign; }                                                     \
 687                                                                         \
 688         perf_trace_buf_submit(entry, __entry_size, rctx, __addr,        \
 689                 __count, &__regs, head, __task);                        \
 690 }
 691
 692 /*
 693  * This part is compiled out, it is only here as a build time check
 694  * to make sure that if the tracepoint handling changes, the
 695  * perf probe will fail to compile unless it too is updated.
 696  */
 697 #undef DEFINE_EVENT
 698 #define DEFINE_EVENT(template, call, proto, args)                       \
 699 static inline void perf_test_probe_##call(void)                         \
 700 {                                                                       \
 701         check_trace_callback_type_##call(perf_trace_##template);        \
 702 }
 703
 704
 705 #undef DEFINE_EVENT_PRINT
 706 #define DEFINE_EVENT_PRINT(template, name, proto, args, print)  \
 707         DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
 708
 709 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 710 #endif /* CONFIG_PERF_EVENTS */
 711