include/trace/ftrace.h

   1 /*
   2  * Stage 1 of the trace events.
   3  *
   4  * Override the macros in <trace/trace_events.h> to include the following:
   5  *
   6  * struct ftrace_raw_<call> {
   7  *      struct trace_entry              ent;
   8  *      <type>                          <item>;
   9  *      <type2>                         <item2>[<len>];
  10  *      [...]
  11  * };
  12  *
  13  * The <type> <item> is created by the __field(type, item) macro or
  14  * the __array(type2, item2, len) macro.
  15  * We simply do "type item;", and that will create the fields
  16  * in the structure.
  17  */
  18
  19 #include <linux/ftrace_event.h>
  20
  21 /*
  22  * DECLARE_EVENT_CLASS can be used to add a generic function
  23  * handlers for events. That is, if all events have the same
  24  * parameters and just have distinct trace points.
  25  * Each tracepoint can be defined with DEFINE_EVENT and that
  26  * will map the DECLARE_EVENT_CLASS to the tracepoint.
  27  *
  28  * TRACE_EVENT is a one to one mapping between tracepoint and template.
  29  */
  30 #undef TRACE_EVENT
  31 #define TRACE_EVENT(name, proto, args, tstruct, assign, print) \
  32         DECLARE_EVENT_CLASS(name,                              \
  33                              PARAMS(proto),                    \
  34                              PARAMS(args),                     \
  35                              PARAMS(tstruct),                  \
  36                              PARAMS(assign),                   \
  37                              PARAMS(print));                   \
  38         DEFINE_EVENT(name, name, PARAMS(proto), PARAMS(args));
  39
  40
  41 #undef __field
  42 #define __field(type, item)             type    item;
  43
  44 #undef __field_ext
  45 #define __field_ext(type, item, filter_type)    type    item;
  46
  47 #undef __field_struct
  48 #define __field_struct(type, item)      type    item;
  49
  50 #undef __field_struct_ext
  51 #define __field_struct_ext(type, item, filter_type)     type    item;
  52
  53 #undef __array
  54 #define __array(type, item, len)        type    item[len];
  55
  56 #undef __dynamic_array
  57 #define __dynamic_array(type, item, len) u32 __data_loc_##item;
  58
  59 #undef __string
  60 #define __string(item, src) __dynamic_array(char, item, -1)
  61
  62 #undef __bitmask
  63 #define __bitmask(item, nr_bits) __dynamic_array(char, item, -1)
  64
  65 #undef TP_STRUCT__entry
  66 #define TP_STRUCT__entry(args...) args
  67
  68 #undef DECLARE_EVENT_CLASS
  69 #define DECLARE_EVENT_CLASS(name, proto, args, tstruct, assign, print)  \
  70         struct ftrace_raw_##name {                                      \
  71                 struct trace_entry      ent;                            \
  72                 tstruct                                                 \
  73                 char                    __data[0];                      \
  74         };                                                              \
  75                                                                         \
  76         static struct ftrace_event_class event_class_##name;
  77
  78 #undef DEFINE_EVENT
  79 #define DEFINE_EVENT(template, name, proto, args)       \
  80         static struct ftrace_event_call __used          \
  81         __attribute__((__aligned__(4))) event_##name
  82
  83 #undef DEFINE_EVENT_FN
  84 #define DEFINE_EVENT_FN(template, name, proto, args, reg, unreg)        \
  85         DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
  86
  87 #undef DEFINE_EVENT_PRINT
  88 #define DEFINE_EVENT_PRINT(template, name, proto, args, print)  \
  89         DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
  90
  91 /* Callbacks are meaningless to ftrace. */
  92 #undef TRACE_EVENT_FN
  93 #define TRACE_EVENT_FN(name, proto, args, tstruct,                      \
  94                 assign, print, reg, unreg)                              \
  95         TRACE_EVENT(name, PARAMS(proto), PARAMS(args),                  \
  96                 PARAMS(tstruct), PARAMS(assign), PARAMS(print))         \
  97
  98 #undef TRACE_EVENT_FLAGS
  99 #define TRACE_EVENT_FLAGS(name, value)                                  \
 100         __TRACE_EVENT_FLAGS(name, value)
 101
 102 #undef TRACE_EVENT_PERF_PERM
 103 #define TRACE_EVENT_PERF_PERM(name, expr...)                            \
 104         __TRACE_EVENT_PERF_PERM(name, expr)
 105
 106 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 107
 108
 109 /*
 110  * Stage 2 of the trace events.
 111  *
 112  * Include the following:
 113  *
 114  * struct ftrace_data_offsets_<call> {
 115  *      u32                             <item1>;
 116  *      u32                             <item2>;
 117  *      [...]
 118  * };
 119  *
 120  * The __dynamic_array() macro will create each u32 <item>, this is
 121  * to keep the offset of each array from the beginning of the event.
 122  * The size of an array is also encoded, in the higher 16 bits of <item>.
 123  */
 124
 125 #undef __field
 126 #define __field(type, item)
 127
 128 #undef __field_ext
 129 #define __field_ext(type, item, filter_type)
 130
 131 #undef __field_struct
 132 #define __field_struct(type, item)
 133
 134 #undef __field_struct_ext
 135 #define __field_struct_ext(type, item, filter_type)
 136
 137 #undef __array
 138 #define __array(type, item, len)
 139
 140 #undef __dynamic_array
 141 #define __dynamic_array(type, item, len)        u32 item;
 142
 143 #undef __string
 144 #define __string(item, src) __dynamic_array(char, item, -1)
 145
 146 #undef __bitmask
 147 #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1)
 148
 149 #undef DECLARE_EVENT_CLASS
 150 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)  \
 151         struct ftrace_data_offsets_##call {                             \
 152                 tstruct;                                                \
 153         };
 154
 155 #undef DEFINE_EVENT
 156 #define DEFINE_EVENT(template, name, proto, args)
 157
 158 #undef DEFINE_EVENT_PRINT
 159 #define DEFINE_EVENT_PRINT(template, name, proto, args, print)  \
 160         DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
 161
 162 #undef TRACE_EVENT_FLAGS
 163 #define TRACE_EVENT_FLAGS(event, flag)
 164
 165 #undef TRACE_EVENT_PERF_PERM
 166 #define TRACE_EVENT_PERF_PERM(event, expr...)
 167
 168 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 169
 170 /*
 171  * Stage 3 of the trace events.
 172  *
 173  * Override the macros in <trace/trace_events.h> to include the following:
 174  *
 175  * enum print_line_t
 176  * ftrace_raw_output_<call>(struct trace_iterator *iter, int flags)
 177  * {
 178  *      struct trace_seq *s = &iter->seq;
 179  *      struct ftrace_raw_<call> *field; <-- defined in stage 1
 180  *      struct trace_entry *entry;
 181  *      struct trace_seq *p = &iter->tmp_seq;
 182  *      int ret;
 183  *
 184  *      entry = iter->ent;
 185  *
 186  *      if (entry->type != event_<call>->event.type) {
 187  *              WARN_ON_ONCE(1);
 188  *              return TRACE_TYPE_UNHANDLED;
 189  *      }
 190  *
 191  *      field = (typeof(field))entry;
 192  *
 193  *      trace_seq_init(p);
 194  *      ret = trace_seq_printf(s, "%s: ", <call>);
 195  *      if (ret)
 196  *              ret = trace_seq_printf(s, <TP_printk> "\n");
 197  *      if (!ret)
 198  *              return TRACE_TYPE_PARTIAL_LINE;
 199  *
 200  *      return TRACE_TYPE_HANDLED;
 201  * }
 202  *
 203  * This is the method used to print the raw event to the trace
 204  * output format. Note, this is not needed if the data is read
 205  * in binary.
 206  */
 207
 208 #undef __entry
 209 #define __entry field
 210
 211 #undef TP_printk
 212 #define TP_printk(fmt, args...) fmt "\n", args
 213
 214 #undef __get_dynamic_array
 215 #define __get_dynamic_array(field)      \
 216                 ((void *)__entry + (__entry->__data_loc_##field & 0xffff))
 217
 218 #undef __get_dynamic_array_len
 219 #define __get_dynamic_array_len(field)  \
 220                 ((__entry->__data_loc_##field >> 16) & 0xffff)
 221
 222 #undef __get_str
 223 #define __get_str(field) (char *)__get_dynamic_array(field)
 224
 225 #undef __get_bitmask
 226 #define __get_bitmask(field)                                            \
 227         ({                                                              \
 228                 void *__bitmask = __get_dynamic_array(field);           \
 229                 unsigned int __bitmask_size;                            \
 230                 __bitmask_size = __get_dynamic_array_len(field);        \
 231                 ftrace_print_bitmask_seq(p, __bitmask, __bitmask_size); \
 232         })
 233
 234 #undef __print_flags
 235 #define __print_flags(flag, delim, flag_array...)                       \
 236         ({                                                              \
 237                 static const struct trace_print_flags __flags[] =       \
 238                         { flag_array, { -1, NULL }};                    \
 239                 ftrace_print_flags_seq(p, delim, flag, __flags);        \
 240         })
 241
 242 #undef __print_symbolic
 243 #define __print_symbolic(value, symbol_array...)                        \
 244         ({                                                              \
 245                 static const struct trace_print_flags symbols[] =       \
 246                         { symbol_array, { -1, NULL }};                  \
 247                 ftrace_print_symbols_seq(p, value, symbols);            \
 248         })
 249
 250 #undef __print_symbolic_u64
 251 #if BITS_PER_LONG == 32
 252 #define __print_symbolic_u64(value, symbol_array...)                    \
 253         ({                                                              \
 254                 static const struct trace_print_flags_u64 symbols[] =   \
 255                         { symbol_array, { -1, NULL } };                 \
 256                 ftrace_print_symbols_seq_u64(p, value, symbols);        \
 257         })
 258 #else
 259 #define __print_symbolic_u64(value, symbol_array...)                    \
 260                         __print_symbolic(value, symbol_array)
 261 #endif
 262
 263 #undef __print_hex
 264 #define __print_hex(buf, buf_len) ftrace_print_hex_seq(p, buf, buf_len)
 265
 266 #undef __print_array
 267 #define __print_array(array, count, el_size)                            \
 268         ({                                                              \
 269                 BUILD_BUG_ON(el_size != 1 && el_size != 2 &&            \
 270                              el_size != 4 && el_size != 8);             \
 271                 ftrace_print_array_seq(p, array, count, el_size);       \
 272         })
 273
 274 #undef DECLARE_EVENT_CLASS
 275 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)  \
 276 static notrace enum print_line_t                                        \
 277 ftrace_raw_output_##call(struct trace_iterator *iter, int flags,        \
 278                          struct trace_event *trace_event)               \
 279 {                                                                       \
 280         struct trace_seq *s = &iter->seq;                               \
 281         struct trace_seq __maybe_unused *p = &iter->tmp_seq;            \
 282         struct ftrace_raw_##call *field;                                \
 283         int ret;                                                        \
 284                                                                         \
 285         field = (typeof(field))iter->ent;                               \
 286                                                                         \
 287         ret = ftrace_raw_output_prep(iter, trace_event);                \
 288         if (ret != TRACE_TYPE_HANDLED)                                  \
 289                 return ret;                                             \
 290                                                                         \
 291         trace_seq_printf(s, print);                                     \
 292                                                                         \
 293         return trace_handle_return(s);                                  \
 294 }                                                                       \
 295 static struct trace_event_functions ftrace_event_type_funcs_##call = {  \
 296         .trace                  = ftrace_raw_output_##call,             \
 297 };
 298
 299 #undef DEFINE_EVENT_PRINT
 300 #define DEFINE_EVENT_PRINT(template, call, proto, args, print)          \
 301 static notrace enum print_line_t                                        \
 302 ftrace_raw_output_##call(struct trace_iterator *iter, int flags,        \
 303                          struct trace_event *event)                     \
 304 {                                                                       \
 305         struct ftrace_raw_##template *field;                            \
 306         struct trace_entry *entry;                                      \
 307         struct trace_seq *p = &iter->tmp_seq;                           \
 308                                                                         \
 309         entry = iter->ent;                                              \
 310                                                                         \
 311         if (entry->type != event_##call.event.type) {                   \
 312                 WARN_ON_ONCE(1);                                        \
 313                 return TRACE_TYPE_UNHANDLED;                            \
 314         }                                                               \
 315                                                                         \
 316         field = (typeof(field))entry;                                   \
 317                                                                         \
 318         trace_seq_init(p);                                              \
 319         return ftrace_output_call(iter, #call, print);                  \
 320 }                                                                       \
 321 static struct trace_event_functions ftrace_event_type_funcs_##call = {  \
 322         .trace                  = ftrace_raw_output_##call,             \
 323 };
 324
 325 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 326
 327 #undef __field_ext
 328 #define __field_ext(type, item, filter_type)                            \
 329         ret = trace_define_field(event_call, #type, #item,              \
 330                                  offsetof(typeof(field), item),         \
 331                                  sizeof(field.item),                    \
 332                                  is_signed_type(type), filter_type);    \
 333         if (ret)                                                        \
 334                 return ret;
 335
 336 #undef __field_struct_ext
 337 #define __field_struct_ext(type, item, filter_type)                     \
 338         ret = trace_define_field(event_call, #type, #item,              \
 339                                  offsetof(typeof(field), item),         \
 340                                  sizeof(field.item),                    \
 341                                  0, filter_type);                       \
 342         if (ret)                                                        \
 343                 return ret;
 344
 345 #undef __field
 346 #define __field(type, item)     __field_ext(type, item, FILTER_OTHER)
 347
 348 #undef __field_struct
 349 #define __field_struct(type, item) __field_struct_ext(type, item, FILTER_OTHER)
 350
 351 #undef __array
 352 #define __array(type, item, len)                                        \
 353         do {                                                            \
 354                 char *type_str = #type"["__stringify(len)"]";           \
 355                 BUILD_BUG_ON(len > MAX_FILTER_STR_VAL);                 \
 356                 ret = trace_define_field(event_call, type_str, #item,   \
 357                                  offsetof(typeof(field), item),         \
 358                                  sizeof(field.item),                    \
 359                                  is_signed_type(type), FILTER_OTHER);   \
 360                 if (ret)                                                \
 361                         return ret;                                     \
 362         } while (0);
 363
 364 #undef __dynamic_array
 365 #define __dynamic_array(type, item, len)                                       \
 366         ret = trace_define_field(event_call, "__data_loc " #type "[]", #item,  \
 367                                  offsetof(typeof(field), __data_loc_##item),   \
 368                                  sizeof(field.__data_loc_##item),              \
 369                                  is_signed_type(type), FILTER_OTHER);
 370
 371 #undef __string
 372 #define __string(item, src) __dynamic_array(char, item, -1)
 373
 374 #undef __bitmask
 375 #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1)
 376
 377 #undef DECLARE_EVENT_CLASS
 378 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print)    \
 379 static int notrace __init                                               \
 380 ftrace_define_fields_##call(struct ftrace_event_call *event_call)       \
 381 {                                                                       \
 382         struct ftrace_raw_##call field;                                 \
 383         int ret;                                                        \
 384                                                                         \
 385         tstruct;                                                        \
 386                                                                         \
 387         return ret;                                                     \
 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  * remember the offset of each array from the beginning of the event.
 401  */
 402
 403 #undef __entry
 404 #define __entry entry
 405
 406 #undef __field
 407 #define __field(type, item)
 408
 409 #undef __field_ext
 410 #define __field_ext(type, item, filter_type)
 411
 412 #undef __field_struct
 413 #define __field_struct(type, item)
 414
 415 #undef __field_struct_ext
 416 #define __field_struct_ext(type, item, filter_type)
 417
 418 #undef __array
 419 #define __array(type, item, len)
 420
 421 #undef __dynamic_array
 422 #define __dynamic_array(type, item, len)                                \
 423         __item_length = (len) * sizeof(type);                           \
 424         __data_offsets->item = __data_size +                            \
 425                                offsetof(typeof(*entry), __data);        \
 426         __data_offsets->item |= __item_length << 16;                    \
 427         __data_size += __item_length;
 428
 429 #undef __string
 430 #define __string(item, src) __dynamic_array(char, item,                 \
 431                     strlen((src) ? (const char *)(src) : "(null)") + 1)
 432
 433 /*
 434  * __bitmask_size_in_bytes_raw is the number of bytes needed to hold
 435  * num_possible_cpus().
 436  */
 437 #define __bitmask_size_in_bytes_raw(nr_bits)    \
 438         (((nr_bits) + 7) / 8)
 439
 440 #define __bitmask_size_in_longs(nr_bits)                        \
 441         ((__bitmask_size_in_bytes_raw(nr_bits) +                \
 442           ((BITS_PER_LONG / 8) - 1)) / (BITS_PER_LONG / 8))
 443
 444 /*
 445  * __bitmask_size_in_bytes is the number of bytes needed to hold
 446  * num_possible_cpus() padded out to the nearest long. This is what
 447  * is saved in the buffer, just to be consistent.
 448  */
 449 #define __bitmask_size_in_bytes(nr_bits)                                \
 450         (__bitmask_size_in_longs(nr_bits) * (BITS_PER_LONG / 8))
 451
 452 #undef __bitmask
 453 #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item,   \
 454                                          __bitmask_size_in_longs(nr_bits))
 455
 456 #undef DECLARE_EVENT_CLASS
 457 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)  \
 458 static inline notrace int ftrace_get_offsets_##call(                    \
 459         struct ftrace_data_offsets_##call *__data_offsets, proto)       \
 460 {                                                                       \
 461         int __data_size = 0;                                            \
 462         int __maybe_unused __item_length;                               \
 463         struct ftrace_raw_##call __maybe_unused *entry;                 \
 464                                                                         \
 465         tstruct;                                                        \
 466                                                                         \
 467         return __data_size;                                             \
 468 }
 469
 470 #undef DEFINE_EVENT
 471 #define DEFINE_EVENT(template, name, proto, args)
 472
 473 #undef DEFINE_EVENT_PRINT
 474 #define DEFINE_EVENT_PRINT(template, name, proto, args, print)  \
 475         DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
 476
 477 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 478
 479 /*
 480  * Stage 4 of the trace events.
 481  *
 482  * Override the macros in <trace/trace_events.h> to include the following:
 483  *
 484  * For those macros defined with TRACE_EVENT:
 485  *
 486  * static struct ftrace_event_call event_<call>;
 487  *
 488  * static void ftrace_raw_event_<call>(void *__data, proto)
 489  * {
 490  *      struct ftrace_event_file *ftrace_file = __data;
 491  *      struct ftrace_event_call *event_call = ftrace_file->event_call;
 492  *      struct ftrace_data_offsets_<call> __maybe_unused __data_offsets;
 493  *      unsigned long eflags = ftrace_file->flags;
 494  *      enum event_trigger_type __tt = ETT_NONE;
 495  *      struct ring_buffer_event *event;
 496  *      struct ftrace_raw_<call> *entry; <-- defined in stage 1
 497  *      struct ring_buffer *buffer;
 498  *      unsigned long irq_flags;
 499  *      int __data_size;
 500  *      int pc;
 501  *
 502  *      if (!(eflags & FTRACE_EVENT_FL_TRIGGER_COND)) {
 503  *              if (eflags & FTRACE_EVENT_FL_TRIGGER_MODE)
 504  *                      event_triggers_call(ftrace_file, NULL);
 505  *              if (eflags & FTRACE_EVENT_FL_SOFT_DISABLED)
 506  *                      return;
 507  *      }
 508  *
 509  *      local_save_flags(irq_flags);
 510  *      pc = preempt_count();
 511  *
 512  *      __data_size = ftrace_get_offsets_<call>(&__data_offsets, args);
 513  *
 514  *      event = trace_event_buffer_lock_reserve(&buffer, ftrace_file,
 515  *                                event_<call>->event.type,
 516  *                                sizeof(*entry) + __data_size,
 517  *                                irq_flags, pc);
 518  *      if (!event)
 519  *              return;
 520  *      entry   = ring_buffer_event_data(event);
 521  *
 522  *      { <assign>; }  <-- Here we assign the entries by the __field and
 523  *                         __array macros.
 524  *
 525  *      if (eflags & FTRACE_EVENT_FL_TRIGGER_COND)
 526  *              __tt = event_triggers_call(ftrace_file, entry);
 527  *
 528  *      if (test_bit(FTRACE_EVENT_FL_SOFT_DISABLED_BIT,
 529  *                   &ftrace_file->flags))
 530  *              ring_buffer_discard_commit(buffer, event);
 531  *      else if (!filter_check_discard(ftrace_file, entry, buffer, event))
 532  *              trace_buffer_unlock_commit(buffer, event, irq_flags, pc);
 533  *
 534  *      if (__tt)
 535  *              event_triggers_post_call(ftrace_file, __tt);
 536  * }
 537  *
 538  * static struct trace_event ftrace_event_type_<call> = {
 539  *      .trace                  = ftrace_raw_output_<call>, <-- stage 2
 540  * };
 541  *
 542  * static const char print_fmt_<call>[] = <TP_printk>;
 543  *
 544  * static struct ftrace_event_class __used event_class_<template> = {
 545  *      .system                 = "<system>",
 546  *      .define_fields          = ftrace_define_fields_<call>,
 547  *      .fields                 = LIST_HEAD_INIT(event_class_##call.fields),
 548  *      .raw_init               = trace_event_raw_init,
 549  *      .probe                  = ftrace_raw_event_##call,
 550  *      .reg                    = ftrace_event_reg,
 551  * };
 552  *
 553  * static struct ftrace_event_call event_<call> = {
 554  *      .class                  = event_class_<template>,
 555  *      {
 556  *              .tp                     = &__tracepoint_<call>,
 557  *      },
 558  *      .event                  = &ftrace_event_type_<call>,
 559  *      .print_fmt              = print_fmt_<call>,
 560  *      .flags                  = TRACE_EVENT_FL_TRACEPOINT,
 561  * };
 562  * // its only safe to use pointers when doing linker tricks to
 563  * // create an array.
 564  * static struct ftrace_event_call __used
 565  * __attribute__((section("_ftrace_events"))) *__event_<call> = &event_<call>;
 566  *
 567  */
 568
 569 #ifdef CONFIG_PERF_EVENTS
 570
 571 #define _TRACE_PERF_PROTO(call, proto)                                  \
 572         static notrace void                                             \
 573         perf_trace_##call(void *__data, proto);
 574
 575 #define _TRACE_PERF_INIT(call)                                          \
 576         .perf_probe             = perf_trace_##call,
 577
 578 #else
 579 #define _TRACE_PERF_PROTO(call, proto)
 580 #define _TRACE_PERF_INIT(call)
 581 #endif /* CONFIG_PERF_EVENTS */
 582
 583 #undef __entry
 584 #define __entry entry
 585
 586 #undef __field
 587 #define __field(type, item)
 588
 589 #undef __field_struct
 590 #define __field_struct(type, item)
 591
 592 #undef __array
 593 #define __array(type, item, len)
 594
 595 #undef __dynamic_array
 596 #define __dynamic_array(type, item, len)                                \
 597         __entry->__data_loc_##item = __data_offsets.item;
 598
 599 #undef __string
 600 #define __string(item, src) __dynamic_array(char, item, -1)
 601
 602 #undef __assign_str
 603 #define __assign_str(dst, src)                                          \
 604         strcpy(__get_str(dst), (src) ? (const char *)(src) : "(null)");
 605
 606 #undef __bitmask
 607 #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1)
 608
 609 #undef __get_bitmask
 610 #define __get_bitmask(field) (char *)__get_dynamic_array(field)
 611
 612 #undef __assign_bitmask
 613 #define __assign_bitmask(dst, src, nr_bits)                                     \
 614         memcpy(__get_bitmask(dst), (src), __bitmask_size_in_bytes(nr_bits))
 615
 616 #undef TP_fast_assign
 617 #define TP_fast_assign(args...) args
 618
 619 #undef __perf_addr
 620 #define __perf_addr(a)  (a)
 621
 622 #undef __perf_count
 623 #define __perf_count(c) (c)
 624
 625 #undef __perf_task
 626 #define __perf_task(t)  (t)
 627
 628 #undef DECLARE_EVENT_CLASS
 629 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)  \
 630                                                                         \
 631 static notrace void                                                     \
 632 ftrace_raw_event_##call(void *__data, proto)                            \
 633 {                                                                       \
 634         struct ftrace_event_file *ftrace_file = __data;                 \
 635         struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
 636         struct ftrace_event_buffer fbuffer;                             \
 637         struct ftrace_raw_##call *entry;                                \
 638         int __data_size;                                                \
 639                                                                         \
 640         if (ftrace_trigger_soft_disabled(ftrace_file))                  \
 641                 return;                                                 \
 642                                                                         \
 643         __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
 644                                                                         \
 645         entry = ftrace_event_buffer_reserve(&fbuffer, ftrace_file,      \
 646                                  sizeof(*entry) + __data_size);         \
 647                                                                         \
 648         if (!entry)                                                     \
 649                 return;                                                 \
 650                                                                         \
 651         tstruct                                                         \
 652                                                                         \
 653         { assign; }                                                     \
 654                                                                         \
 655         ftrace_event_buffer_commit(&fbuffer);                           \
 656 }
 657 /*
 658  * The ftrace_test_probe is compiled out, it is only here as a build time check
 659  * to make sure that if the tracepoint handling changes, the ftrace probe will
 660  * fail to compile unless it too is updated.
 661  */
 662
 663 #undef DEFINE_EVENT
 664 #define DEFINE_EVENT(template, call, proto, args)                       \
 665 static inline void ftrace_test_probe_##call(void)                       \
 666 {                                                                       \
 667         check_trace_callback_type_##call(ftrace_raw_event_##template);  \
 668 }
 669
 670 #undef DEFINE_EVENT_PRINT
 671 #define DEFINE_EVENT_PRINT(template, name, proto, args, print)
 672
 673 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 674
 675 #undef __entry
 676 #define __entry REC
 677
 678 #undef __print_flags
 679 #undef __print_symbolic
 680 #undef __print_hex
 681 #undef __get_dynamic_array
 682 #undef __get_dynamic_array_len
 683 #undef __get_str
 684 #undef __get_bitmask
 685 #undef __print_array
 686
 687 #undef TP_printk
 688 #define TP_printk(fmt, args...) "\"" fmt "\", "  __stringify(args)
 689
 690 #undef DECLARE_EVENT_CLASS
 691 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)  \
 692 _TRACE_PERF_PROTO(call, PARAMS(proto));                                 \
 693 static const char print_fmt_##call[] = print;                           \
 694 static struct ftrace_event_class __used __refdata event_class_##call = { \
 695         .system                 = __stringify(TRACE_SYSTEM),            \
 696         .define_fields          = ftrace_define_fields_##call,          \
 697         .fields                 = LIST_HEAD_INIT(event_class_##call.fields),\
 698         .raw_init               = trace_event_raw_init,                 \
 699         .probe                  = ftrace_raw_event_##call,              \
 700         .reg                    = ftrace_event_reg,                     \
 701         _TRACE_PERF_INIT(call)                                          \
 702 };
 703
 704 #undef DEFINE_EVENT
 705 #define DEFINE_EVENT(template, call, proto, args)                       \
 706                                                                         \
 707 static struct ftrace_event_call __used event_##call = {                 \
 708         .class                  = &event_class_##template,              \
 709         {                                                               \
 710                 .tp                     = &__tracepoint_##call,         \
 711         },                                                              \
 712         .event.funcs            = &ftrace_event_type_funcs_##template,  \
 713         .print_fmt              = print_fmt_##template,                 \
 714         .flags                  = TRACE_EVENT_FL_TRACEPOINT,            \
 715 };                                                                      \
 716 static struct ftrace_event_call __used                                  \
 717 __attribute__((section("_ftrace_events"))) *__event_##call = &event_##call
 718
 719 #undef DEFINE_EVENT_PRINT
 720 #define DEFINE_EVENT_PRINT(template, call, proto, args, print)          \
 721                                                                         \
 722 static const char print_fmt_##call[] = print;                           \
 723                                                                         \
 724 static struct ftrace_event_call __used event_##call = {                 \
 725         .class                  = &event_class_##template,              \
 726         {                                                               \
 727                 .tp                     = &__tracepoint_##call,         \
 728         },                                                              \
 729         .event.funcs            = &ftrace_event_type_funcs_##call,      \
 730         .print_fmt              = print_fmt_##call,                     \
 731         .flags                  = TRACE_EVENT_FL_TRACEPOINT,            \
 732 };                                                                      \
 733 static struct ftrace_event_call __used                                  \
 734 __attribute__((section("_ftrace_events"))) *__event_##call = &event_##call
 735
 736 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 737
 738
 739 #ifdef CONFIG_PERF_EVENTS
 740
 741 #undef __entry
 742 #define __entry entry
 743
 744 #undef __get_dynamic_array
 745 #define __get_dynamic_array(field)      \
 746                 ((void *)__entry + (__entry->__data_loc_##field & 0xffff))
 747
 748 #undef __get_dynamic_array_len
 749 #define __get_dynamic_array_len(field)  \
 750                 ((__entry->__data_loc_##field >> 16) & 0xffff)
 751
 752 #undef __get_str
 753 #define __get_str(field) (char *)__get_dynamic_array(field)
 754
 755 #undef __get_bitmask
 756 #define __get_bitmask(field) (char *)__get_dynamic_array(field)
 757
 758 #undef __perf_addr
 759 #define __perf_addr(a)  (__addr = (a))
 760
 761 #undef __perf_count
 762 #define __perf_count(c) (__count = (c))
 763
 764 #undef __perf_task
 765 #define __perf_task(t)  (__task = (t))
 766
 767 #undef DECLARE_EVENT_CLASS
 768 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)  \
 769 static notrace void                                                     \
 770 perf_trace_##call(void *__data, proto)                                  \
 771 {                                                                       \
 772         struct ftrace_event_call *event_call = __data;                  \
 773         struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
 774         struct ftrace_raw_##call *entry;                                \
 775         struct pt_regs *__regs;                                         \
 776         u64 __addr = 0, __count = 1;                                    \
 777         struct task_struct *__task = NULL;                              \
 778         struct hlist_head *head;                                        \
 779         int __entry_size;                                               \
 780         int __data_size;                                                \
 781         int rctx;                                                       \
 782                                                                         \
 783         __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
 784                                                                         \
 785         head = this_cpu_ptr(event_call->perf_events);                   \
 786         if (__builtin_constant_p(!__task) && !__task &&                 \
 787                                 hlist_empty(head))                      \
 788                 return;                                                 \
 789                                                                         \
 790         __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),\
 791                              sizeof(u64));                              \
 792         __entry_size -= sizeof(u32);                                    \
 793                                                                         \
 794         entry = perf_trace_buf_prepare(__entry_size,                    \
 795                         event_call->event.type, &__regs, &rctx);        \
 796         if (!entry)                                                     \
 797                 return;                                                 \
 798                                                                         \
 799         perf_fetch_caller_regs(__regs);                                 \
 800                                                                         \
 801         tstruct                                                         \
 802                                                                         \
 803         { assign; }                                                     \
 804                                                                         \
 805         perf_trace_buf_submit(entry, __entry_size, rctx, __addr,        \
 806                 __count, __regs, head, __task);                         \
 807 }
 808
 809 /*
 810  * This part is compiled out, it is only here as a build time check
 811  * to make sure that if the tracepoint handling changes, the
 812  * perf probe will fail to compile unless it too is updated.
 813  */
 814 #undef DEFINE_EVENT
 815 #define DEFINE_EVENT(template, call, proto, args)                       \
 816 static inline void perf_test_probe_##call(void)                         \
 817 {                                                                       \
 818         check_trace_callback_type_##call(perf_trace_##template);        \
 819 }
 820
 821
 822 #undef DEFINE_EVENT_PRINT
 823 #define DEFINE_EVENT_PRINT(template, name, proto, args, print)  \
 824         DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
 825
 826 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 827 #endif /* CONFIG_PERF_EVENTS */
 828