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                 mutex_lock(&event_storage_mutex);                       \
 307                 BUILD_BUG_ON(len > MAX_FILTER_STR_VAL);                 \
 308                 snprintf(event_storage, sizeof(event_storage),          \
 309                          "%s[%d]", #type, len);                         \
 310                 ret = trace_define_field(event_call, event_storage, #item, \
 311                                  offsetof(typeof(field), item),         \
 312                                  sizeof(field.item),                    \
 313                                  is_signed_type(type), FILTER_OTHER);   \
 314                 mutex_unlock(&event_storage_mutex);                     \
 315                 if (ret)                                                \
 316                         return ret;                                     \
 317         } while (0);
 318
 319 #undef __dynamic_array
 320 #define __dynamic_array(type, item, len)                                       \
 321         ret = trace_define_field(event_call, "__data_loc " #type "[]", #item,  \
 322                                  offsetof(typeof(field), __data_loc_##item),   \
 323                                  sizeof(field.__data_loc_##item),              \
 324                                  is_signed_type(type), FILTER_OTHER);
 325
 326 #undef __string
 327 #define __string(item, src) __dynamic_array(char, item, -1)
 328
 329 #undef DECLARE_EVENT_CLASS
 330 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print)    \
 331 static int notrace __init                                               \
 332 ftrace_define_fields_##call(struct ftrace_event_call *event_call)       \
 333 {                                                                       \
 334         struct ftrace_raw_##call field;                                 \
 335         int ret;                                                        \
 336                                                                         \
 337         tstruct;                                                        \
 338                                                                         \
 339         return ret;                                                     \
 340 }
 341
 342 #undef DEFINE_EVENT
 343 #define DEFINE_EVENT(template, name, proto, args)
 344
 345 #undef DEFINE_EVENT_PRINT
 346 #define DEFINE_EVENT_PRINT(template, name, proto, args, print)  \
 347         DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
 348
 349 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 350
 351 /*
 352  * remember the offset of each array from the beginning of the event.
 353  */
 354
 355 #undef __entry
 356 #define __entry entry
 357
 358 #undef __field
 359 #define __field(type, item)
 360
 361 #undef __field_ext
 362 #define __field_ext(type, item, filter_type)
 363
 364 #undef __array
 365 #define __array(type, item, len)
 366
 367 #undef __dynamic_array
 368 #define __dynamic_array(type, item, len)                                \
 369         __data_offsets->item = __data_size +                            \
 370                                offsetof(typeof(*entry), __data);        \
 371         __data_offsets->item |= (len * sizeof(type)) << 16;             \
 372         __data_size += (len) * sizeof(type);
 373
 374 #undef __string
 375 #define __string(item, src) __dynamic_array(char, item, strlen(src) + 1)
 376
 377 #undef DECLARE_EVENT_CLASS
 378 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)  \
 379 static inline notrace int ftrace_get_offsets_##call(                    \
 380         struct ftrace_data_offsets_##call *__data_offsets, proto)       \
 381 {                                                                       \
 382         int __data_size = 0;                                            \
 383         struct ftrace_raw_##call __maybe_unused *entry;                 \
 384                                                                         \
 385         tstruct;                                                        \
 386                                                                         \
 387         return __data_size;                                             \
 388 }
 389
 390 #undef DEFINE_EVENT
 391 #define DEFINE_EVENT(template, name, proto, args)
 392
 393 #undef DEFINE_EVENT_PRINT
 394 #define DEFINE_EVENT_PRINT(template, name, proto, args, print)  \
 395         DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
 396
 397 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 398
 399 /*
 400  * Stage 4 of the trace events.
 401  *
 402  * Override the macros in <trace/trace_events.h> to include the following:
 403  *
 404  * For those macros defined with TRACE_EVENT:
 405  *
 406  * static struct ftrace_event_call event_<call>;
 407  *
 408  * static void ftrace_raw_event_<call>(void *__data, proto)
 409  * {
 410  *      struct ftrace_event_file *ftrace_file = __data;
 411  *      struct ftrace_event_call *event_call = ftrace_file->event_call;
 412  *      struct ftrace_data_offsets_<call> __maybe_unused __data_offsets;
 413  *      struct ring_buffer_event *event;
 414  *      struct ftrace_raw_<call> *entry; <-- defined in stage 1
 415  *      struct ring_buffer *buffer;
 416  *      unsigned long irq_flags;
 417  *      int __data_size;
 418  *      int pc;
 419  *
 420  *      if (test_bit(FTRACE_EVENT_FL_SOFT_DISABLED_BIT,
 421  *                   &ftrace_file->flags))
 422  *              return;
 423  *
 424  *      local_save_flags(irq_flags);
 425  *      pc = preempt_count();
 426  *
 427  *      __data_size = ftrace_get_offsets_<call>(&__data_offsets, args);
 428  *
 429  *      event = trace_event_buffer_lock_reserve(&buffer, ftrace_file,
 430  *                                event_<call>->event.type,
 431  *                                sizeof(*entry) + __data_size,
 432  *                                irq_flags, pc);
 433  *      if (!event)
 434  *              return;
 435  *      entry   = ring_buffer_event_data(event);
 436  *
 437  *      { <assign>; }  <-- Here we assign the entries by the __field and
 438  *                         __array macros.
 439  *
 440  *      if (!filter_current_check_discard(buffer, event_call, entry, event))
 441  *              trace_nowake_buffer_unlock_commit(buffer,
 442  *                                                 event, irq_flags, pc);
 443  * }
 444  *
 445  * static struct trace_event ftrace_event_type_<call> = {
 446  *      .trace                  = ftrace_raw_output_<call>, <-- stage 2
 447  * };
 448  *
 449  * static const char print_fmt_<call>[] = <TP_printk>;
 450  *
 451  * static struct ftrace_event_class __used event_class_<template> = {
 452  *      .system                 = "<system>",
 453  *      .define_fields          = ftrace_define_fields_<call>,
 454  *      .fields                 = LIST_HEAD_INIT(event_class_##call.fields),
 455  *      .raw_init               = trace_event_raw_init,
 456  *      .probe                  = ftrace_raw_event_##call,
 457  *      .reg                    = ftrace_event_reg,
 458  * };
 459  *
 460  * static struct ftrace_event_call event_<call> = {
 461  *      .name                   = "<call>",
 462  *      .class                  = event_class_<template>,
 463  *      .event                  = &ftrace_event_type_<call>,
 464  *      .print_fmt              = print_fmt_<call>,
 465  * };
 466  * // its only safe to use pointers when doing linker tricks to
 467  * // create an array.
 468  * static struct ftrace_event_call __used
 469  * __attribute__((section("_ftrace_events"))) *__event_<call> = &event_<call>;
 470  *
 471  */
 472
 473 #ifdef CONFIG_PERF_EVENTS
 474
 475 #define _TRACE_PERF_PROTO(call, proto)                                  \
 476         static notrace void                                             \
 477         perf_trace_##call(void *__data, proto);
 478
 479 #define _TRACE_PERF_INIT(call)                                          \
 480         .perf_probe             = perf_trace_##call,
 481
 482 #else
 483 #define _TRACE_PERF_PROTO(call, proto)
 484 #define _TRACE_PERF_INIT(call)
 485 #endif /* CONFIG_PERF_EVENTS */
 486
 487 #undef __entry
 488 #define __entry entry
 489
 490 #undef __field
 491 #define __field(type, item)
 492
 493 #undef __array
 494 #define __array(type, item, len)
 495
 496 #undef __dynamic_array
 497 #define __dynamic_array(type, item, len)                                \
 498         __entry->__data_loc_##item = __data_offsets.item;
 499
 500 #undef __string
 501 #define __string(item, src) __dynamic_array(char, item, -1)             \
 502
 503 #undef __assign_str
 504 #define __assign_str(dst, src)                                          \
 505         strcpy(__get_str(dst), src);
 506
 507 #undef TP_fast_assign
 508 #define TP_fast_assign(args...) args
 509
 510 #undef __perf_addr
 511 #define __perf_addr(a)  (a)
 512
 513 #undef __perf_count
 514 #define __perf_count(c) (c)
 515
 516 #undef __perf_task
 517 #define __perf_task(t)  (t)
 518
 519 #undef DECLARE_EVENT_CLASS
 520 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)  \
 521                                                                         \
 522 static notrace void                                                     \
 523 ftrace_raw_event_##call(void *__data, proto)                            \
 524 {                                                                       \
 525         struct ftrace_event_file *ftrace_file = __data;                 \
 526         struct ftrace_event_call *event_call = ftrace_file->event_call; \
 527         struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
 528         struct ring_buffer_event *event;                                \
 529         struct ftrace_raw_##call *entry;                                \
 530         struct ring_buffer *buffer;                                     \
 531         unsigned long irq_flags;                                        \
 532         int __data_size;                                                \
 533         int pc;                                                         \
 534                                                                         \
 535         if (test_bit(FTRACE_EVENT_FL_SOFT_DISABLED_BIT,                 \
 536                      &ftrace_file->flags))                              \
 537                 return;                                                 \
 538                                                                         \
 539         local_save_flags(irq_flags);                                    \
 540         pc = preempt_count();                                           \
 541                                                                         \
 542         __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
 543                                                                         \
 544         event = trace_event_buffer_lock_reserve(&buffer, ftrace_file,   \
 545                                  event_call->event.type,                \
 546                                  sizeof(*entry) + __data_size,          \
 547                                  irq_flags, pc);                        \
 548         if (!event)                                                     \
 549                 return;                                                 \
 550         entry   = ring_buffer_event_data(event);                        \
 551                                                                         \
 552         tstruct                                                         \
 553                                                                         \
 554         { assign; }                                                     \
 555                                                                         \
 556         if (!filter_current_check_discard(buffer, event_call, entry, event)) \
 557                 trace_buffer_unlock_commit(buffer, event, irq_flags, pc); \
 558 }
 559 /*
 560  * The ftrace_test_probe is compiled out, it is only here as a build time check
 561  * to make sure that if the tracepoint handling changes, the ftrace probe will
 562  * fail to compile unless it too is updated.
 563  */
 564
 565 #undef DEFINE_EVENT
 566 #define DEFINE_EVENT(template, call, proto, args)                       \
 567 static inline void ftrace_test_probe_##call(void)                       \
 568 {                                                                       \
 569         check_trace_callback_type_##call(ftrace_raw_event_##template);  \
 570 }
 571
 572 #undef DEFINE_EVENT_PRINT
 573 #define DEFINE_EVENT_PRINT(template, name, proto, args, print)
 574
 575 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 576
 577 #undef __entry
 578 #define __entry REC
 579
 580 #undef __print_flags
 581 #undef __print_symbolic
 582 #undef __print_hex
 583 #undef __get_dynamic_array
 584 #undef __get_str
 585
 586 #undef TP_printk
 587 #define TP_printk(fmt, args...) "\"" fmt "\", "  __stringify(args)
 588
 589 #undef DECLARE_EVENT_CLASS
 590 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)  \
 591 _TRACE_PERF_PROTO(call, PARAMS(proto));                                 \
 592 static const char print_fmt_##call[] = print;                           \
 593 static struct ftrace_event_class __used __refdata event_class_##call = { \
 594         .system                 = __stringify(TRACE_SYSTEM),            \
 595         .define_fields          = ftrace_define_fields_##call,          \
 596         .fields                 = LIST_HEAD_INIT(event_class_##call.fields),\
 597         .raw_init               = trace_event_raw_init,                 \
 598         .probe                  = ftrace_raw_event_##call,              \
 599         .reg                    = ftrace_event_reg,                     \
 600         _TRACE_PERF_INIT(call)                                          \
 601 };
 602
 603 #undef DEFINE_EVENT
 604 #define DEFINE_EVENT(template, call, proto, args)                       \
 605                                                                         \
 606 static struct ftrace_event_call __used event_##call = {                 \
 607         .name                   = #call,                                \
 608         .class                  = &event_class_##template,              \
 609         .event.funcs            = &ftrace_event_type_funcs_##template,  \
 610         .print_fmt              = print_fmt_##template,                 \
 611 };                                                                      \
 612 static struct ftrace_event_call __used                                  \
 613 __attribute__((section("_ftrace_events"))) *__event_##call = &event_##call
 614
 615 #undef DEFINE_EVENT_PRINT
 616 #define DEFINE_EVENT_PRINT(template, call, proto, args, print)          \
 617                                                                         \
 618 static const char print_fmt_##call[] = print;                           \
 619                                                                         \
 620 static struct ftrace_event_call __used event_##call = {                 \
 621         .name                   = #call,                                \
 622         .class                  = &event_class_##template,              \
 623         .event.funcs            = &ftrace_event_type_funcs_##call,      \
 624         .print_fmt              = print_fmt_##call,                     \
 625 };                                                                      \
 626 static struct ftrace_event_call __used                                  \
 627 __attribute__((section("_ftrace_events"))) *__event_##call = &event_##call
 628
 629 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 630
 631
 632 #ifdef CONFIG_PERF_EVENTS
 633
 634 #undef __entry
 635 #define __entry entry
 636
 637 #undef __get_dynamic_array
 638 #define __get_dynamic_array(field)      \
 639                 ((void *)__entry + (__entry->__data_loc_##field & 0xffff))
 640
 641 #undef __get_str
 642 #define __get_str(field) (char *)__get_dynamic_array(field)
 643
 644 #undef __perf_addr
 645 #define __perf_addr(a)  (__addr = (a))
 646
 647 #undef __perf_count
 648 #define __perf_count(c) (__count = (c))
 649
 650 #undef __perf_task
 651 #define __perf_task(t)  (__task = (t))
 652
 653 #undef DECLARE_EVENT_CLASS
 654 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)  \
 655 static notrace void                                                     \
 656 perf_trace_##call(void *__data, proto)                                  \
 657 {                                                                       \
 658         struct ftrace_event_call *event_call = __data;                  \
 659         struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
 660         struct ftrace_raw_##call *entry;                                \
 661         struct pt_regs __regs;                                          \
 662         u64 __addr = 0, __count = 1;                                    \
 663         struct task_struct *__task = NULL;                              \
 664         struct hlist_head *head;                                        \
 665         int __entry_size;                                               \
 666         int __data_size;                                                \
 667         int rctx;                                                       \
 668                                                                         \
 669         __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
 670                                                                         \
 671         head = this_cpu_ptr(event_call->perf_events);                   \
 672         if (__builtin_constant_p(!__task) && !__task &&                 \
 673                                 hlist_empty(head))                      \
 674                 return;                                                 \
 675                                                                         \
 676         __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),\
 677                              sizeof(u64));                              \
 678         __entry_size -= sizeof(u32);                                    \
 679                                                                         \
 680         perf_fetch_caller_regs(&__regs);                                \
 681         entry = perf_trace_buf_prepare(__entry_size,                    \
 682                         event_call->event.type, &__regs, &rctx);        \
 683         if (!entry)                                                     \
 684                 return;                                                 \
 685                                                                         \
 686         tstruct                                                         \
 687                                                                         \
 688         { assign; }                                                     \
 689                                                                         \
 690         perf_trace_buf_submit(entry, __entry_size, rctx, __addr,        \
 691                 __count, &__regs, head, __task);                        \
 692 }
 693
 694 /*
 695  * This part is compiled out, it is only here as a build time check
 696  * to make sure that if the tracepoint handling changes, the
 697  * perf probe will fail to compile unless it too is updated.
 698  */
 699 #undef DEFINE_EVENT
 700 #define DEFINE_EVENT(template, call, proto, args)                       \
 701 static inline void perf_test_probe_##call(void)                         \
 702 {                                                                       \
 703         check_trace_callback_type_##call(perf_trace_##template);        \
 704 }
 705
 706
 707 #undef DEFINE_EVENT_PRINT
 708 #define DEFINE_EVENT_PRINT(template, name, proto, args, print)  \
 709         DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
 710
 711 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 712 #endif /* CONFIG_PERF_EVENTS */
 713