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 #undef __field
  22 #define __field(type, item)             type    item;
  23
  24 #undef __array
  25 #define __array(type, item, len)        type    item[len];
  26
  27 #undef __dynamic_array
  28 #define __dynamic_array(type, item, len) unsigned short __data_loc_##item;
  29
  30 #undef __string
  31 #define __string(item, src) __dynamic_array(char, item, -1)
  32
  33 #undef TP_STRUCT__entry
  34 #define TP_STRUCT__entry(args...) args
  35
  36 #undef TRACE_EVENT
  37 #define TRACE_EVENT(name, proto, args, tstruct, assign, print)  \
  38         struct ftrace_raw_##name {                              \
  39                 struct trace_entry      ent;                    \
  40                 tstruct                                         \
  41                 char                    __data[0];              \
  42         };                                                      \
  43         static struct ftrace_event_call event_##name
  44
  45 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
  46
  47
  48 /*
  49  * Stage 2 of the trace events.
  50  *
  51  * Include the following:
  52  *
  53  * struct ftrace_data_offsets_<call> {
  54  *      int                             <item1>;
  55  *      int                             <item2>;
  56  *      [...]
  57  * };
  58  *
  59  * The __dynamic_array() macro will create each int <item>, this is
  60  * to keep the offset of each array from the beginning of the event.
  61  */
  62
  63 #undef __field
  64 #define __field(type, item);
  65
  66 #undef __array
  67 #define __array(type, item, len)
  68
  69 #undef __dynamic_array
  70 #define __dynamic_array(type, item, len)        int item;
  71
  72 #undef __string
  73 #define __string(item, src) __dynamic_array(char, item, -1)
  74
  75 #undef TRACE_EVENT
  76 #define TRACE_EVENT(call, proto, args, tstruct, assign, print)          \
  77         struct ftrace_data_offsets_##call {                             \
  78                 tstruct;                                                \
  79         };
  80
  81 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
  82
  83 /*
  84  * Setup the showing format of trace point.
  85  *
  86  * int
  87  * ftrace_format_##call(struct trace_seq *s)
  88  * {
  89  *      struct ftrace_raw_##call field;
  90  *      int ret;
  91  *
  92  *      ret = trace_seq_printf(s, #type " " #item ";"
  93  *                             " offset:%u; size:%u;\n",
  94  *                             offsetof(struct ftrace_raw_##call, item),
  95  *                             sizeof(field.type));
  96  *
  97  * }
  98  */
  99
 100 #undef TP_STRUCT__entry
 101 #define TP_STRUCT__entry(args...) args
 102
 103 #undef __field
 104 #define __field(type, item)                                     \
 105         ret = trace_seq_printf(s, "\tfield:" #type " " #item ";\t"      \
 106                                "offset:%u;\tsize:%u;\n",                \
 107                                (unsigned int)offsetof(typeof(field), item), \
 108                                (unsigned int)sizeof(field.item));       \
 109         if (!ret)                                                       \
 110                 return 0;
 111
 112 #undef __array
 113 #define __array(type, item, len)                                                \
 114         ret = trace_seq_printf(s, "\tfield:" #type " " #item "[" #len "];\t"    \
 115                                "offset:%u;\tsize:%u;\n",                \
 116                                (unsigned int)offsetof(typeof(field), item), \
 117                                (unsigned int)sizeof(field.item));       \
 118         if (!ret)                                                       \
 119                 return 0;
 120
 121 #undef __dynamic_array
 122 #define __dynamic_array(type, item, len)                                       \
 123         ret = trace_seq_printf(s, "\tfield:__data_loc " #item ";\t"            \
 124                                "offset:%u;\tsize:%u;\n",                       \
 125                                (unsigned int)offsetof(typeof(field),           \
 126                                         __data_loc_##item),                    \
 127                                (unsigned int)sizeof(field.__data_loc_##item)); \
 128         if (!ret)                                                              \
 129                 return 0;
 130
 131 #undef __string
 132 #define __string(item, src) __dynamic_array(char, item, -1)
 133
 134 #undef __entry
 135 #define __entry REC
 136
 137 #undef __print_symbolic
 138 #undef __get_dynamic_array
 139 #undef __get_str
 140
 141 #undef TP_printk
 142 #define TP_printk(fmt, args...) "%s, %s\n", #fmt, __stringify(args)
 143
 144 #undef TP_fast_assign
 145 #define TP_fast_assign(args...) args
 146
 147 #undef TP_perf_assign
 148 #define TP_perf_assign(args...)
 149
 150 #undef TRACE_EVENT
 151 #define TRACE_EVENT(call, proto, args, tstruct, func, print)            \
 152 static int                                                              \
 153 ftrace_format_##call(struct trace_seq *s)                               \
 154 {                                                                       \
 155         struct ftrace_raw_##call field __attribute__((unused));         \
 156         int ret = 0;                                                    \
 157                                                                         \
 158         tstruct;                                                        \
 159                                                                         \
 160         trace_seq_printf(s, "\nprint fmt: " print);                     \
 161                                                                         \
 162         return ret;                                                     \
 163 }
 164
 165 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 166
 167 /*
 168  * Stage 3 of the trace events.
 169  *
 170  * Override the macros in <trace/trace_events.h> to include the following:
 171  *
 172  * enum print_line_t
 173  * ftrace_raw_output_<call>(struct trace_iterator *iter, int flags)
 174  * {
 175  *      struct trace_seq *s = &iter->seq;
 176  *      struct ftrace_raw_<call> *field; <-- defined in stage 1
 177  *      struct trace_entry *entry;
 178  *      struct trace_seq *p;
 179  *      int ret;
 180  *
 181  *      entry = iter->ent;
 182  *
 183  *      if (entry->type != event_<call>.id) {
 184  *              WARN_ON_ONCE(1);
 185  *              return TRACE_TYPE_UNHANDLED;
 186  *      }
 187  *
 188  *      field = (typeof(field))entry;
 189  *
 190  *      p = get_cpu_var(ftrace_event_seq);
 191  *      trace_seq_init(p);
 192  *      ret = trace_seq_printf(s, <TP_printk> "\n");
 193  *      put_cpu();
 194  *      if (!ret)
 195  *              return TRACE_TYPE_PARTIAL_LINE;
 196  *
 197  *      return TRACE_TYPE_HANDLED;
 198  * }
 199  *
 200  * This is the method used to print the raw event to the trace
 201  * output format. Note, this is not needed if the data is read
 202  * in binary.
 203  */
 204
 205 #undef __entry
 206 #define __entry field
 207
 208 #undef TP_printk
 209 #define TP_printk(fmt, args...) fmt "\n", args
 210
 211 #undef __get_dynamic_array
 212 #define __get_dynamic_array(field)      \
 213                 ((void *)__entry + __entry->__data_loc_##field)
 214
 215 #undef __get_str
 216 #define __get_str(field) (char *)__get_dynamic_array(field)
 217
 218 #undef __print_flags
 219 #define __print_flags(flag, delim, flag_array...)                       \
 220         ({                                                              \
 221                 static const struct trace_print_flags flags[] =         \
 222                         { flag_array, { -1, NULL }};                    \
 223                 ftrace_print_flags_seq(p, delim, flag, flags);          \
 224         })
 225
 226 #undef __print_symbolic
 227 #define __print_symbolic(value, symbol_array...)                        \
 228         ({                                                              \
 229                 static const struct trace_print_flags symbols[] =       \
 230                         { symbol_array, { -1, NULL }};                  \
 231                 ftrace_print_symbols_seq(p, value, symbols);            \
 232         })
 233
 234 #undef TRACE_EVENT
 235 #define TRACE_EVENT(call, proto, args, tstruct, assign, print)          \
 236 enum print_line_t                                                       \
 237 ftrace_raw_output_##call(struct trace_iterator *iter, int flags)        \
 238 {                                                                       \
 239         struct trace_seq *s = &iter->seq;                               \
 240         struct ftrace_raw_##call *field;                                \
 241         struct trace_entry *entry;                                      \
 242         struct trace_seq *p;                                            \
 243         int ret;                                                        \
 244                                                                         \
 245         entry = iter->ent;                                              \
 246                                                                         \
 247         if (entry->type != event_##call.id) {                           \
 248                 WARN_ON_ONCE(1);                                        \
 249                 return TRACE_TYPE_UNHANDLED;                            \
 250         }                                                               \
 251                                                                         \
 252         field = (typeof(field))entry;                                   \
 253                                                                         \
 254         p = &get_cpu_var(ftrace_event_seq);                             \
 255         trace_seq_init(p);                                              \
 256         ret = trace_seq_printf(s, #call ": " print);                    \
 257         put_cpu();                                                      \
 258         if (!ret)                                                       \
 259                 return TRACE_TYPE_PARTIAL_LINE;                         \
 260                                                                         \
 261         return TRACE_TYPE_HANDLED;                                      \
 262 }
 263
 264 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 265
 266 #undef __field
 267 #define __field(type, item)                                             \
 268         ret = trace_define_field(event_call, #type, #item,              \
 269                                  offsetof(typeof(field), item),         \
 270                                  sizeof(field.item), is_signed_type(type));     \
 271         if (ret)                                                        \
 272                 return ret;
 273
 274 #undef __array
 275 #define __array(type, item, len)                                        \
 276         BUILD_BUG_ON(len > MAX_FILTER_STR_VAL);                         \
 277         ret = trace_define_field(event_call, #type "[" #len "]", #item, \
 278                                  offsetof(typeof(field), item),         \
 279                                  sizeof(field.item), 0);                \
 280         if (ret)                                                        \
 281                 return ret;
 282
 283 #undef __dynamic_array
 284 #define __dynamic_array(type, item, len)                                       \
 285         ret = trace_define_field(event_call, "__data_loc" "[" #type "]", #item,\
 286                                 offsetof(typeof(field), __data_loc_##item),    \
 287                                  sizeof(field.__data_loc_##item), 0);
 288
 289 #undef __string
 290 #define __string(item, src) __dynamic_array(char, item, -1)
 291
 292 #undef TRACE_EVENT
 293 #define TRACE_EVENT(call, proto, args, tstruct, func, print)            \
 294 int                                                                     \
 295 ftrace_define_fields_##call(void)                                       \
 296 {                                                                       \
 297         struct ftrace_raw_##call field;                                 \
 298         struct ftrace_event_call *event_call = &event_##call;           \
 299         int ret;                                                        \
 300                                                                         \
 301         __common_field(int, type, 1);                                   \
 302         __common_field(unsigned char, flags, 0);                        \
 303         __common_field(unsigned char, preempt_count, 0);                \
 304         __common_field(int, pid, 1);                                    \
 305         __common_field(int, tgid, 1);                                   \
 306                                                                         \
 307         tstruct;                                                        \
 308                                                                         \
 309         return ret;                                                     \
 310 }
 311
 312 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 313
 314 /*
 315  * remember the offset of each array from the beginning of the event.
 316  */
 317
 318 #undef __entry
 319 #define __entry entry
 320
 321 #undef __field
 322 #define __field(type, item)
 323
 324 #undef __array
 325 #define __array(type, item, len)
 326
 327 #undef __dynamic_array
 328 #define __dynamic_array(type, item, len)                                \
 329         __data_offsets->item = __data_size +                            \
 330                                offsetof(typeof(*entry), __data);        \
 331         __data_size += (len) * sizeof(type);
 332
 333 #undef __string
 334 #define __string(item, src) __dynamic_array(char, item, strlen(src) + 1)       \
 335
 336 #undef TRACE_EVENT
 337 #define TRACE_EVENT(call, proto, args, tstruct, assign, print)          \
 338 static inline int ftrace_get_offsets_##call(                            \
 339         struct ftrace_data_offsets_##call *__data_offsets, proto)       \
 340 {                                                                       \
 341         int __data_size = 0;                                            \
 342         struct ftrace_raw_##call __maybe_unused *entry;                 \
 343                                                                         \
 344         tstruct;                                                        \
 345                                                                         \
 346         return __data_size;                                             \
 347 }
 348
 349 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 350
 351 #ifdef CONFIG_EVENT_PROFILE
 352
 353 /*
 354  * Generate the functions needed for tracepoint perf_counter support.
 355  *
 356  * NOTE: The insertion profile callback (ftrace_profile_<call>) is defined later
 357  *
 358  * static int ftrace_profile_enable_<call>(struct ftrace_event_call *event_call)
 359  * {
 360  *      int ret = 0;
 361  *
 362  *      if (!atomic_inc_return(&event_call->profile_count))
 363  *              ret = register_trace_<call>(ftrace_profile_<call>);
 364  *
 365  *      return ret;
 366  * }
 367  *
 368  * static void ftrace_profile_disable_<call>(struct ftrace_event_call *event_call)
 369  * {
 370  *      if (atomic_add_negative(-1, &event->call->profile_count))
 371  *              unregister_trace_<call>(ftrace_profile_<call>);
 372  * }
 373  *
 374  */
 375
 376 #undef TRACE_EVENT
 377 #define TRACE_EVENT(call, proto, args, tstruct, assign, print)          \
 378                                                                         \
 379 static void ftrace_profile_##call(proto);                               \
 380                                                                         \
 381 static int ftrace_profile_enable_##call(struct ftrace_event_call *event_call) \
 382 {                                                                       \
 383         int ret = 0;                                                    \
 384                                                                         \
 385         if (!atomic_inc_return(&event_call->profile_count))             \
 386                 ret = register_trace_##call(ftrace_profile_##call);     \
 387                                                                         \
 388         return ret;                                                     \
 389 }                                                                       \
 390                                                                         \
 391 static void ftrace_profile_disable_##call(struct ftrace_event_call *event_call)\
 392 {                                                                       \
 393         if (atomic_add_negative(-1, &event_call->profile_count))        \
 394                 unregister_trace_##call(ftrace_profile_##call);         \
 395 }
 396
 397 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 398
 399 #endif
 400
 401 /*
 402  * Stage 4 of the trace events.
 403  *
 404  * Override the macros in <trace/trace_events.h> to include the following:
 405  *
 406  * static void ftrace_event_<call>(proto)
 407  * {
 408  *      event_trace_printk(_RET_IP_, "<call>: " <fmt>);
 409  * }
 410  *
 411  * static int ftrace_reg_event_<call>(void)
 412  * {
 413  *      int ret;
 414  *
 415  *      ret = register_trace_<call>(ftrace_event_<call>);
 416  *      if (!ret)
 417  *              pr_info("event trace: Could not activate trace point "
 418  *                      "probe to  <call>");
 419  *      return ret;
 420  * }
 421  *
 422  * static void ftrace_unreg_event_<call>(void)
 423  * {
 424  *      unregister_trace_<call>(ftrace_event_<call>);
 425  * }
 426  *
 427  *
 428  * For those macros defined with TRACE_EVENT:
 429  *
 430  * static struct ftrace_event_call event_<call>;
 431  *
 432  * static void ftrace_raw_event_<call>(proto)
 433  * {
 434  *      struct ring_buffer_event *event;
 435  *      struct ftrace_raw_<call> *entry; <-- defined in stage 1
 436  *      unsigned long irq_flags;
 437  *      int pc;
 438  *
 439  *      local_save_flags(irq_flags);
 440  *      pc = preempt_count();
 441  *
 442  *      event = trace_current_buffer_lock_reserve(event_<call>.id,
 443  *                                sizeof(struct ftrace_raw_<call>),
 444  *                                irq_flags, pc);
 445  *      if (!event)
 446  *              return;
 447  *      entry   = ring_buffer_event_data(event);
 448  *
 449  *      <assign>;  <-- Here we assign the entries by the __field and
 450  *                      __array macros.
 451  *
 452  *      trace_current_buffer_unlock_commit(event, irq_flags, pc);
 453  * }
 454  *
 455  * static int ftrace_raw_reg_event_<call>(void)
 456  * {
 457  *      int ret;
 458  *
 459  *      ret = register_trace_<call>(ftrace_raw_event_<call>);
 460  *      if (!ret)
 461  *              pr_info("event trace: Could not activate trace point "
 462  *                      "probe to <call>");
 463  *      return ret;
 464  * }
 465  *
 466  * static void ftrace_unreg_event_<call>(void)
 467  * {
 468  *      unregister_trace_<call>(ftrace_raw_event_<call>);
 469  * }
 470  *
 471  * static struct trace_event ftrace_event_type_<call> = {
 472  *      .trace                  = ftrace_raw_output_<call>, <-- stage 2
 473  * };
 474  *
 475  * static int ftrace_raw_init_event_<call>(void)
 476  * {
 477  *      int id;
 478  *
 479  *      id = register_ftrace_event(&ftrace_event_type_<call>);
 480  *      if (!id)
 481  *              return -ENODEV;
 482  *      event_<call>.id = id;
 483  *      return 0;
 484  * }
 485  *
 486  * static struct ftrace_event_call __used
 487  * __attribute__((__aligned__(4)))
 488  * __attribute__((section("_ftrace_events"))) event_<call> = {
 489  *      .name                   = "<call>",
 490  *      .system                 = "<system>",
 491  *      .raw_init               = ftrace_raw_init_event_<call>,
 492  *      .regfunc                = ftrace_reg_event_<call>,
 493  *      .unregfunc              = ftrace_unreg_event_<call>,
 494  *      .show_format            = ftrace_format_<call>,
 495  * }
 496  *
 497  */
 498
 499 #undef TP_FMT
 500 #define TP_FMT(fmt, args...)    fmt "\n", ##args
 501
 502 #ifdef CONFIG_EVENT_PROFILE
 503
 504 #define _TRACE_PROFILE_INIT(call)                                       \
 505         .profile_count = ATOMIC_INIT(-1),                               \
 506         .profile_enable = ftrace_profile_enable_##call,                 \
 507         .profile_disable = ftrace_profile_disable_##call,
 508
 509 #else
 510 #define _TRACE_PROFILE_INIT(call)
 511 #endif
 512
 513 #undef __entry
 514 #define __entry entry
 515
 516 #undef __field
 517 #define __field(type, item)
 518
 519 #undef __array
 520 #define __array(type, item, len)
 521
 522 #undef __dynamic_array
 523 #define __dynamic_array(type, item, len)                                \
 524         __entry->__data_loc_##item = __data_offsets.item;
 525
 526 #undef __string
 527 #define __string(item, src) __dynamic_array(char, item, -1)             \
 528
 529 #undef __assign_str
 530 #define __assign_str(dst, src)                                          \
 531         strcpy(__get_str(dst), src);
 532
 533 #undef TRACE_EVENT
 534 #define TRACE_EVENT(call, proto, args, tstruct, assign, print)          \
 535                                                                         \
 536 static struct ftrace_event_call event_##call;                           \
 537                                                                         \
 538 static void ftrace_raw_event_##call(proto)                              \
 539 {                                                                       \
 540         struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
 541         struct ftrace_event_call *event_call = &event_##call;           \
 542         struct ring_buffer_event *event;                                \
 543         struct ftrace_raw_##call *entry;                                \
 544         unsigned long irq_flags;                                        \
 545         int __data_size;                                                \
 546         int pc;                                                         \
 547                                                                         \
 548         local_save_flags(irq_flags);                                    \
 549         pc = preempt_count();                                           \
 550                                                                         \
 551         __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
 552                                                                         \
 553         event = trace_current_buffer_lock_reserve(event_##call.id,      \
 554                                  sizeof(*entry) + __data_size,          \
 555                                  irq_flags, pc);                        \
 556         if (!event)                                                     \
 557                 return;                                                 \
 558         entry   = ring_buffer_event_data(event);                        \
 559                                                                         \
 560                                                                         \
 561         tstruct                                                         \
 562                                                                         \
 563         { assign; }                                                     \
 564                                                                         \
 565         if (!filter_current_check_discard(event_call, entry, event))    \
 566                 trace_nowake_buffer_unlock_commit(event, irq_flags, pc); \
 567 }                                                                       \
 568                                                                         \
 569 static int ftrace_raw_reg_event_##call(void)                            \
 570 {                                                                       \
 571         int ret;                                                        \
 572                                                                         \
 573         ret = register_trace_##call(ftrace_raw_event_##call);           \
 574         if (ret)                                                        \
 575                 pr_info("event trace: Could not activate trace point "  \
 576                         "probe to " #call "\n");                        \
 577         return ret;                                                     \
 578 }                                                                       \
 579                                                                         \
 580 static void ftrace_raw_unreg_event_##call(void)                         \
 581 {                                                                       \
 582         unregister_trace_##call(ftrace_raw_event_##call);               \
 583 }                                                                       \
 584                                                                         \
 585 static struct trace_event ftrace_event_type_##call = {                  \
 586         .trace                  = ftrace_raw_output_##call,             \
 587 };                                                                      \
 588                                                                         \
 589 static int ftrace_raw_init_event_##call(void)                           \
 590 {                                                                       \
 591         int id;                                                         \
 592                                                                         \
 593         id = register_ftrace_event(&ftrace_event_type_##call);          \
 594         if (!id)                                                        \
 595                 return -ENODEV;                                         \
 596         event_##call.id = id;                                           \
 597         INIT_LIST_HEAD(&event_##call.fields);                           \
 598         init_preds(&event_##call);                                      \
 599         return 0;                                                       \
 600 }                                                                       \
 601                                                                         \
 602 static struct ftrace_event_call __used                                  \
 603 __attribute__((__aligned__(4)))                                         \
 604 __attribute__((section("_ftrace_events"))) event_##call = {             \
 605         .name                   = #call,                                \
 606         .system                 = __stringify(TRACE_SYSTEM),            \
 607         .event                  = &ftrace_event_type_##call,            \
 608         .raw_init               = ftrace_raw_init_event_##call,         \
 609         .regfunc                = ftrace_raw_reg_event_##call,          \
 610         .unregfunc              = ftrace_raw_unreg_event_##call,        \
 611         .show_format            = ftrace_format_##call,                 \
 612         .define_fields          = ftrace_define_fields_##call,          \
 613         _TRACE_PROFILE_INIT(call)                                       \
 614 }
 615
 616 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 617
 618 /*
 619  * Define the insertion callback to profile events
 620  *
 621  * The job is very similar to ftrace_raw_event_<call> except that we don't
 622  * insert in the ring buffer but in a perf counter.
 623  *
 624  * static void ftrace_profile_<call>(proto)
 625  * {
 626  *      struct ftrace_data_offsets_<call> __maybe_unused __data_offsets;
 627  *      struct ftrace_event_call *event_call = &event_<call>;
 628  *      extern void perf_tpcounter_event(int, u64, u64, void *, int);
 629  *      struct ftrace_raw_##call *entry;
 630  *      u64 __addr = 0, __count = 1;
 631  *      unsigned long irq_flags;
 632  *      int __entry_size;
 633  *      int __data_size;
 634  *      int pc;
 635  *
 636  *      local_save_flags(irq_flags);
 637  *      pc = preempt_count();
 638  *
 639  *      __data_size = ftrace_get_offsets_<call>(&__data_offsets, args);
 640  *
 641  *      // Below we want to get the aligned size by taking into account
 642  *      // the u32 field that will later store the buffer size
 643  *      __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),
 644  *                           sizeof(u64));
 645  *      __entry_size -= sizeof(u32);
 646  *
 647  *      do {
 648  *              char raw_data[__entry_size]; <- allocate our sample in the stack
 649  *              struct trace_entry *ent;
 650  *
 651  *              zero dead bytes from alignment to avoid stack leak to userspace:
 652  *
 653  *              *(u64 *)(&raw_data[__entry_size - sizeof(u64)]) = 0ULL;
 654  *              entry = (struct ftrace_raw_<call> *)raw_data;
 655  *              ent = &entry->ent;
 656  *              tracing_generic_entry_update(ent, irq_flags, pc);
 657  *              ent->type = event_call->id;
 658  *
 659  *              <tstruct> <- do some jobs with dynamic arrays
 660  *
 661  *              <assign>  <- affect our values
 662  *
 663  *              perf_tpcounter_event(event_call->id, __addr, __count, entry,
 664  *                           __entry_size);  <- submit them to perf counter
 665  *      } while (0);
 666  *
 667  * }
 668  */
 669
 670 #ifdef CONFIG_EVENT_PROFILE
 671
 672 #undef __perf_addr
 673 #define __perf_addr(a) __addr = (a)
 674
 675 #undef __perf_count
 676 #define __perf_count(c) __count = (c)
 677
 678 #undef TRACE_EVENT
 679 #define TRACE_EVENT(call, proto, args, tstruct, assign, print)          \
 680 static void ftrace_profile_##call(proto)                                \
 681 {                                                                       \
 682         struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
 683         struct ftrace_event_call *event_call = &event_##call;           \
 684         extern void perf_tpcounter_event(int, u64, u64, void *, int);   \
 685         struct ftrace_raw_##call *entry;                                \
 686         u64 __addr = 0, __count = 1;                                    \
 687         unsigned long irq_flags;                                        \
 688         int __entry_size;                                               \
 689         int __data_size;                                                \
 690         int pc;                                                         \
 691                                                                         \
 692         local_save_flags(irq_flags);                                    \
 693         pc = preempt_count();                                           \
 694                                                                         \
 695         __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
 696         __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),\
 697                              sizeof(u64));                              \
 698         __entry_size -= sizeof(u32);                                    \
 699                                                                         \
 700         do {                                                            \
 701                 char raw_data[__entry_size];                            \
 702                 struct trace_entry *ent;                                \
 703                                                                         \
 704                 *(u64 *)(&raw_data[__entry_size - sizeof(u64)]) = 0ULL; \
 705                 entry = (struct ftrace_raw_##call *)raw_data;           \
 706                 ent = &entry->ent;                                      \
 707                 tracing_generic_entry_update(ent, irq_flags, pc);       \
 708                 ent->type = event_call->id;                             \
 709                                                                         \
 710                 tstruct                                                 \
 711                                                                         \
 712                 { assign; }                                             \
 713                                                                         \
 714                 perf_tpcounter_event(event_call->id, __addr, __count, entry,\
 715                              __entry_size);                             \
 716         } while (0);                                                    \
 717                                                                         \
 718 }
 719
 720 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 721 #endif /* CONFIG_EVENT_PROFILE */
 722
 723 #undef _TRACE_PROFILE_INIT
 724