probes/lttng-events.h

   1 #include <lttng.h>
   2 #include <lttng-types.h>
   3 #include <linux/debugfs.h>
   4 #include "../wrapper/vmalloc.h" /* for wrapper_vmalloc_sync_all() */
   5 #include "../wrapper/ringbuffer/frontend_types.h"
   6 #include "../ltt-events.h"
   7 #include "../ltt-tracer-core.h"
   8
   9 struct lttng_event_field {
  10         const char *name;
  11         const struct lttng_type type;
  12 };
  13
  14 struct lttng_event_desc {
  15         const struct lttng_event_field *fields;
  16         const char *name;
  17         void *probe_callback;
  18         unsigned int nr_fields;
  19 };
  20
  21 /*
  22  * Macro declarations used for all stages.
  23  */
  24
  25 /*
  26  * DECLARE_EVENT_CLASS can be used to add a generic function
  27  * handlers for events. That is, if all events have the same
  28  * parameters and just have distinct trace points.
  29  * Each tracepoint can be defined with DEFINE_EVENT and that
  30  * will map the DECLARE_EVENT_CLASS to the tracepoint.
  31  *
  32  * TRACE_EVENT is a one to one mapping between tracepoint and template.
  33  */
  34
  35 #undef TRACE_EVENT
  36 #define TRACE_EVENT(name, proto, args, tstruct, assign, print) \
  37         DECLARE_EVENT_CLASS(name,                              \
  38                              PARAMS(proto),                    \
  39                              PARAMS(args),                     \
  40                              PARAMS(tstruct),                  \
  41                              PARAMS(assign),                   \
  42                              PARAMS(print))                    \
  43         DEFINE_EVENT(name, name, PARAMS(proto), PARAMS(args))
  44
  45 #undef DEFINE_EVENT_PRINT
  46 #define DEFINE_EVENT_PRINT(template, name, proto, args, print)  \
  47         DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
  48
  49 /* Callbacks are meaningless to LTTng. */
  50 #undef TRACE_EVENT_FN
  51 #define TRACE_EVENT_FN(name, proto, args, tstruct,                      \
  52                 assign, print, reg, unreg)                              \
  53         TRACE_EVENT(name, PARAMS(proto), PARAMS(args),                  \
  54                 PARAMS(tstruct), PARAMS(assign), PARAMS(print))         \
  55
  56 /*
  57  * Stage 0.1 of the trace events.
  58  *
  59  * Create dummy trace calls for each events, verifying that the LTTng module
  60  * TRACE_EVENT headers match the kernel arguments. Will be optimized out by the
  61  * compiler.
  62  */
  63
  64 #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */
  65
  66 #undef TP_PROTO
  67 #define TP_PROTO(args...) args
  68
  69 #undef TP_ARGS
  70 #define TP_ARGS(args...) args
  71
  72 #undef DEFINE_EVENT
  73 #define DEFINE_EVENT(_template, _name, _proto, _args)                   \
  74 void trace_##_name(_proto);
  75
  76 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
  77
  78 /*
  79  * Stage 1 of the trace events.
  80  *
  81  * Create event field type metadata section.
  82  * Each event produce an array of fields.
  83  */
  84
  85 #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */
  86
  87 /* Named field types must be defined in lttng-types.h */
  88
  89 #undef __field
  90 #define __field(_type, _item)                                   \
  91         { .name = #_item, .type = { .atype = atype_integer, .name = #_type} },
  92
  93 #undef __field_ext
  94 #define __field_ext(_type, _item, _filter_type)         __field(_type, _item)
  95
  96 #undef __array
  97 #define __array(_type, _item, _length)                          \
  98         {                                                       \
  99                 .name = #_item,                                 \
 100                 .type = {                                       \
 101                   .atype = atype_array,                         \
 102                   .name = NULL,                                 \
 103                   .u.array.elem_type = #_type,                  \
 104                   .u.array.length = _length,                    \
 105                 },                                              \
 106         },
 107
 108 #undef __dynamic_array
 109 #define __dynamic_array(_type, _item, _length)                  \
 110         {                                                       \
 111                 .name = #_item,                                 \
 112                 .type = {                                       \
 113                   .atype = atype_sequence,                      \
 114                   .name = NULL,                                 \
 115                   .u.sequence.elem_type = #_type,               \
 116                   .u.sequence.length_type = "u32",              \
 117                 },                                              \
 118         },
 119
 120 #undef __string
 121 #define __string(_item, _src)                                   \
 122         {                                                       \
 123                 .name = #_item,                                 \
 124                 .type = {                                       \
 125                   .atype = atype_string,                        \
 126                   .name = NULL,                                 \
 127                   .u.string.encoding = lttng_encode_UTF8,       \
 128                 },                                              \
 129         },
 130
 131 #undef TP_STRUCT__entry
 132 #define TP_STRUCT__entry(args...) args  /* Only one used in this phase */
 133
 134 #undef DECLARE_EVENT_CLASS
 135 #define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print) \
 136         static const struct lttng_event_field __event_fields___##_name[] = { \
 137                 _tstruct                                                     \
 138         };
 139
 140 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 141
 142 /*
 143  * Stage 1.1 of the trace events.
 144  *
 145  * Create probe callback prototypes.
 146  */
 147
 148 #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */
 149
 150 #undef TP_PROTO
 151 #define TP_PROTO(args...) args
 152
 153 #undef DECLARE_EVENT_CLASS
 154 #define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print)  \
 155 static void __event_probe__##_name(void *__data, _proto);
 156
 157 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 158
 159 /*
 160  * Stage 2 of the trace events.
 161  *
 162  * Create an array of events.
 163  */
 164
 165 /* Named field types must be defined in lttng-types.h */
 166
 167 #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */
 168
 169 #undef DEFINE_EVENT
 170 #define DEFINE_EVENT(_template, _name, _proto, _args)                          \
 171                 {                                                              \
 172                         .fields = __event_fields___##_template,                \
 173                         .name = #_name,                                        \
 174                         .probe_callback = (void *) &__event_probe__##_template,\
 175                         .nr_fields = ARRAY_SIZE(__event_fields___##_template), \
 176                 },
 177
 178 #define TP_ID1(_token, _system) _token##_system
 179 #define TP_ID(_token, _system)  TP_ID1(_token, _system)
 180
 181 static const struct lttng_event_desc TP_ID(__event_desc___, TRACE_SYSTEM)[] = {
 182 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 183 };
 184
 185 #undef TP_ID1
 186 #undef TP_ID
 187
 188 /*
 189  * Stage 3 of the trace events.
 190  *
 191  * Create seq file metadata output.
 192  */
 193
 194 #define TP_ID1(_token, _system) _token##_system
 195 #define TP_ID(_token, _system)  TP_ID1(_token, _system)
 196
 197 static void *TP_ID(__lttng_seq_start__, TRACE_SYSTEM)(struct seq_file *m,
 198                                                       loff_t *pos)
 199 {
 200         const struct lttng_event_desc *desc =
 201                 &TP_ID(__event_desc___, TRACE_SYSTEM)[*pos];
 202
 203         if (desc > &TP_ID(__event_desc___, TRACE_SYSTEM)
 204                         [ARRAY_SIZE(TP_ID(__event_desc___, TRACE_SYSTEM)) - 1])
 205                 return NULL;
 206         return (void *) desc;
 207 }
 208
 209 static void *TP_ID(__lttng_seq_next__, TRACE_SYSTEM)(struct seq_file *m,
 210                                                      void *p, loff_t *ppos)
 211 {
 212         const struct lttng_event_desc *desc =
 213                 &TP_ID(__event_desc___, TRACE_SYSTEM)[++(*ppos)];
 214
 215         if (desc > &TP_ID(__event_desc___, TRACE_SYSTEM)
 216                         [ARRAY_SIZE(TP_ID(__event_desc___, TRACE_SYSTEM)) - 1])
 217                 return NULL;
 218         return (void *) desc;
 219 }
 220
 221 static void TP_ID(__lttng_seq_stop__, TRACE_SYSTEM)(struct seq_file *m,
 222                                                     void *p)
 223 {
 224 }
 225
 226 static int TP_ID(__lttng_seq_show__, TRACE_SYSTEM)(struct seq_file *m,
 227                                                    void *p)
 228 {
 229         const struct lttng_event_desc *desc = p;
 230         int i;
 231
 232         seq_printf(m,   "event {\n"
 233                         "\tname = %s;\n"
 234                         "\tid = UNKNOWN;\n"
 235                         "\tstream = UNKNOWN;\n"
 236                         "\tfields = {\n",
 237                         desc->name);
 238         for (i = 0; i < desc->nr_fields; i++) {
 239                 if (desc->fields[i].type.name)  /* Named type */
 240                         seq_printf(m,   "\t\t%s",
 241                                         desc->fields[i].type.name);
 242                 else                            /* Nameless type */
 243                         lttng_print_event_type(m, 2, &desc->fields[i].type);
 244                 seq_printf(m,   " %s;\n", desc->fields[i].name);
 245         }
 246         seq_printf(m,   "\t};\n");
 247         seq_printf(m,   "};\n");
 248         return 0;
 249 }
 250
 251 static const
 252 struct seq_operations TP_ID(__lttng_types_seq_ops__, TRACE_SYSTEM) = {
 253         .start = TP_ID(__lttng_seq_start__, TRACE_SYSTEM),
 254         .next = TP_ID(__lttng_seq_next__, TRACE_SYSTEM),
 255         .stop = TP_ID(__lttng_seq_stop__, TRACE_SYSTEM),
 256         .show = TP_ID(__lttng_seq_show__, TRACE_SYSTEM),
 257 };
 258
 259 static int
 260 TP_ID(__lttng_types_open__, TRACE_SYSTEM)(struct inode *inode, struct file *file)
 261 {
 262         return seq_open(file, &TP_ID(__lttng_types_seq_ops__, TRACE_SYSTEM));
 263 }
 264
 265 static const
 266 struct file_operations TP_ID(__lttng_types_fops__, TRACE_SYSTEM) = {
 267         .open = TP_ID(__lttng_types_open__, TRACE_SYSTEM),
 268         .read = seq_read,
 269         .llseek = seq_lseek,
 270         .release = seq_release_private,
 271 };
 272
 273 static struct dentry *TP_ID(__lttng_types_dentry__, TRACE_SYSTEM);
 274
 275 static int TP_ID(__lttng_types_init__, TRACE_SYSTEM)(void)
 276 {
 277         int ret = 0;
 278
 279         TP_ID(__lttng_types_dentry__, TRACE_SYSTEM) =
 280                 debugfs_create_file("lttng-events-" __stringify(TRACE_SYSTEM),
 281                                     S_IWUSR, NULL, NULL,
 282                                     &TP_ID(__lttng_types_fops__, TRACE_SYSTEM));
 283         if (IS_ERR(TP_ID(__lttng_types_dentry__, TRACE_SYSTEM))
 284             || !TP_ID(__lttng_types_dentry__, TRACE_SYSTEM)) {
 285                 printk(KERN_ERR "Error creating LTTng type export file\n");
 286                 ret = -ENOMEM;
 287                 goto error;
 288         }
 289 error:
 290         return ret;
 291 }
 292
 293 static void TP_ID(__lttng_types_exit__, TRACE_SYSTEM)(void)
 294 {
 295         debugfs_remove(TP_ID(__lttng_types_dentry__, TRACE_SYSTEM));
 296 }
 297
 298 #undef TP_ID1
 299 #undef TP_ID
 300
 301 /*
 302  * Stage 4 of the trace events.
 303  *
 304  * Create static inline function that calculates event size.
 305  */
 306
 307 #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */
 308
 309 /* Named field types must be defined in lttng-types.h */
 310
 311 #undef __field
 312 #define __field(_type, _item)                                                  \
 313         __event_len += lib_ring_buffer_align(__event_len, __alignof__(_type)); \
 314         __event_len += sizeof(_type);
 315
 316 #undef __field_ext
 317 #define __field_ext(_type, _item, _filter_type) __field(_type, _item)
 318
 319 #undef __array
 320 #define __array(_type, _item, _length)                                         \
 321         __event_len += lib_ring_buffer_align(__event_len, __alignof__(_type)); \
 322         __event_len += sizeof(_type) * (_length);
 323
 324 #undef __dynamic_array
 325 #define __dynamic_array(_type, _item, _length)                                 \
 326         __event_len += lib_ring_buffer_align(__event_len, __alignof__(u32));   \
 327         __event_len += sizeof(u32);                                            \
 328         __event_len += lib_ring_buffer_align(__event_len, __alignof__(_type)); \
 329         __event_len += sizeof(_type) * (_length);
 330
 331 #undef __string
 332 #define __string(_item, _src)                                                  \
 333         __event_len += __dynamic_len[__dynamic_len_idx++] = strlen(_src) + 1;
 334
 335 #undef TP_PROTO
 336 #define TP_PROTO(args...) args
 337
 338 #undef TP_STRUCT__entry
 339 #define TP_STRUCT__entry(args...) args
 340
 341 #undef DECLARE_EVENT_CLASS
 342 #define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print)  \
 343 static inline size_t __event_get_size__##_name(size_t *__dynamic_len, _proto) \
 344 {                                                                             \
 345         size_t __event_len = 0;                                               \
 346         unsigned int __dynamic_len_idx = 0;                                   \
 347                                                                               \
 348         if (0)                                                                \
 349                 (void) __dynamic_len_idx;       /* don't warn if unused */    \
 350         _tstruct                                                              \
 351         return __event_len;                                                   \
 352 }
 353
 354 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 355
 356
 357
 358 /*
 359  * Stage 5 of the trace events.
 360  *
 361  * Create static inline function that calculates event payload alignment.
 362  */
 363
 364 #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */
 365
 366 /* Named field types must be defined in lttng-types.h */
 367
 368 #undef __field
 369 #define __field(_type, _item)                                             \
 370         __event_align = max_t(size_t, __event_align, __alignof__(_type));
 371
 372 #undef __field_ext
 373 #define __field_ext(_type, _item, _filter_type) __field(_type, _item)
 374
 375 #undef __array
 376 #define __array(_type, _item, _length)                                    \
 377         __event_align = max_t(size_t, __event_align, __alignof__(_type));
 378
 379 #undef __dynamic_array
 380 #define __dynamic_array(_type, _item, _length)                            \
 381         __event_align = max_t(size_t, __event_align, __alignof__(u32));   \
 382         __event_align = max_t(size_t, __event_align, __alignof__(_type));
 383
 384 #undef __string
 385 #define __string(_item, _src)
 386
 387 #undef TP_PROTO
 388 #define TP_PROTO(args...) args
 389
 390 #undef TP_STRUCT__entry
 391 #define TP_STRUCT__entry(args...) args
 392
 393 #undef DECLARE_EVENT_CLASS
 394 #define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print)  \
 395 static inline size_t __event_get_align__##_name(_proto)                       \
 396 {                                                                             \
 397         size_t __event_align = 1;                                             \
 398         _tstruct                                                              \
 399         return __event_align;                                                 \
 400 }
 401
 402 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 403
 404
 405 /*
 406  * Stage 6 of the trace events.
 407  *
 408  * Create structure declaration that allows the "assign" macros to access the
 409  * field types.
 410  */
 411
 412 #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */
 413
 414 /* Named field types must be defined in lttng-types.h */
 415
 416 #undef __field
 417 #define __field(_type, _item)   _type   _item;
 418
 419 #undef __field_ext
 420 #define __field_ext(_type, _item, _filter_type) __field(_type, _item)
 421
 422 #undef __array
 423 #define __array(_type, _item, _length)  _type   _item;
 424
 425 #undef __dynamic_array
 426 #define __dynamic_array(_type, _item, _length)  _type   _item;
 427
 428 #undef __string
 429 #define __string(_item, _src)   char _item;
 430
 431 #undef TP_STRUCT__entry
 432 #define TP_STRUCT__entry(args...) args
 433
 434 #undef DECLARE_EVENT_CLASS
 435 #define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print)  \
 436 struct __event_typemap__##_name {                                             \
 437         _tstruct                                                              \
 438 };
 439
 440 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 441
 442
 443 /*
 444  * Stage 7 of the trace events.
 445  *
 446  * Create the probe function : call even size calculation and write event data
 447  * into the buffer.
 448  *
 449  * We use both the field and assignment macros to write the fields in the order
 450  * defined in the field declaration. The field declarations control the
 451  * execution order, jumping to the appropriate assignment block.
 452  */
 453
 454 #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */
 455
 456 #undef __field
 457 #define __field(_type, _item)                                           \
 458         goto __assign_##_item;                                          \
 459 __end_field_##_item:
 460
 461 #undef __field_ext
 462 #define __field_ext(_type, _item, _filter_type) __field(_type, _item)
 463
 464 #undef __array
 465 #define __array(_type, _item, _length)                                  \
 466         goto __assign_##_item;                                          \
 467 __end_field_##_item:
 468
 469 #undef __dynamic_array
 470 #define __dynamic_array(_type, _item, _length)                          \
 471         goto __assign_##_item##_1;                                      \
 472 __end_field_##_item##_1:                                                \
 473         goto __assign_##_item##_2;                                      \
 474 __end_field_##_item##_2:
 475
 476 #undef __string
 477 #define __string(_item, _src)                                           \
 478         goto __assign_##_item;                                          \
 479 __end_field_##_item:
 480
 481 /*
 482  * Macros mapping tp_assign() to "=", tp_memcpy() to memcpy() and tp_strcpy() to
 483  * strcpy().
 484  */
 485 #undef tp_assign
 486 #define tp_assign(dest, src)                                            \
 487 __assign_##dest:                                                        \
 488         {                                                               \
 489                 __typeof__(__typemap.dest) __tmp = (src);               \
 490                 lib_ring_buffer_align_ctx(&ctx, __alignof__(__tmp));    \
 491                 __chan->ops->event_write(&ctx, &__tmp, sizeof(__tmp));  \
 492         }                                                               \
 493         goto __end_field_##dest;
 494
 495 #undef tp_memcpy
 496 #define tp_memcpy(dest, src, len)                                       \
 497 __assign_##dest:                                                        \
 498         lib_ring_buffer_align_ctx(&ctx, __alignof__(__typemap.dest));   \
 499         __chan->ops->event_write(&ctx, src, len);                       \
 500         goto __end_field_##dest;
 501
 502 #undef tp_memcpy_dyn
 503 #define tp_memcpy_dyn(dest, src, len)                                   \
 504 __assign_##dest##_1:                                                    \
 505         {                                                               \
 506                 u32 __tmpl = (len);                                     \
 507                 lib_ring_buffer_align_ctx(&ctx, __alignof__(u32));      \
 508                 __chan->ops->event_write(&ctx, &__tmpl, sizeof(u32));   \
 509         }                                                               \
 510         goto __end_field_##dest##_1;                                    \
 511 __assign_##dest##_2:                                                    \
 512         lib_ring_buffer_align_ctx(&ctx, __alignof__(__typemap.dest));   \
 513         __chan->ops->event_write(&ctx, src, len);                       \
 514         goto __end_field_##dest##_2;
 515
 516 #undef tp_strcpy
 517 #define tp_strcpy(dest, src)                                            \
 518         tp_memcpy(dest, src, __get_dynamic_array_len(dest))
 519
 520 /* Named field types must be defined in lttng-types.h */
 521
 522 #undef __get_str
 523 #define __get_str(field)                field
 524
 525 #undef __get_dynamic_array
 526 #define __get_dynamic_array(field)      field
 527
 528 /* Beware: this get len actually consumes the len value */
 529 #undef __get_dynamic_array_len
 530 #define __get_dynamic_array_len(field)  __dynamic_len[__dynamic_len_idx++]
 531
 532 #undef TP_PROTO
 533 #define TP_PROTO(args...) args
 534
 535 #undef TP_ARGS
 536 #define TP_ARGS(args...) args
 537
 538 #undef TP_STRUCT__entry
 539 #define TP_STRUCT__entry(args...) args
 540
 541 #undef TP_fast_assign
 542 #define TP_fast_assign(args...) args
 543
 544 #undef DECLARE_EVENT_CLASS
 545 #define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print)  \
 546 static void __event_probe__##_name(void *__data, _proto)                      \
 547 {                                                                             \
 548         struct ltt_event *__event = __data;                                   \
 549         struct ltt_channel *__chan = __event->chan;                           \
 550         struct lib_ring_buffer_ctx ctx;                                       \
 551         size_t __event_len, __event_align;                                    \
 552         size_t __dynamic_len_idx = 0;                                         \
 553         size_t __dynamic_len[ARRAY_SIZE(__event_fields___##_name)];           \
 554         struct __event_typemap__##_name __typemap;                            \
 555         int __ret;                                                            \
 556                                                                               \
 557         if (0)                                                                \
 558                 (void) __dynamic_len_idx;       /* don't warn if unused */    \
 559         if (!ACCESS_ONCE(__chan->session->active))                            \
 560                 return;                                                       \
 561         __event_len = __event_get_size__##_name(__dynamic_len, _args);        \
 562         __event_align = __event_get_align__##_name(_args);                    \
 563         lib_ring_buffer_ctx_init(&ctx, __chan->chan, NULL, __event_len,       \
 564                                  __event_align, -1);                          \
 565         __ret = __chan->ops->event_reserve(&ctx);                             \
 566         if (__ret < 0)                                                        \
 567                 return;                                                       \
 568         /* Control code (field ordering) */                                   \
 569         _tstruct                                                              \
 570         __chan->ops->event_commit(&ctx);                                      \
 571         return;                                                               \
 572         /* Copy code, steered by control code */                              \
 573         _assign                                                               \
 574 }
 575
 576 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 577
 578 /*
 579  * Stage 8 of the trace events.
 580  *
 581  * Register/unregister probes at module load/unload.
 582  */
 583
 584 #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */
 585
 586 #define TP_ID1(_token, _system) _token##_system
 587 #define TP_ID(_token, _system)  TP_ID1(_token, _system)
 588 #define module_init_eval1(_token, _system)      module_init(_token##_system)
 589 #define module_init_eval(_token, _system)       module_init_eval1(_token, _system)
 590 #define module_exit_eval1(_token, _system)      module_exit(_token##_system)
 591 #define module_exit_eval(_token, _system)       module_exit_eval1(_token, _system)
 592
 593 static int TP_ID(__lttng_events_init__, TRACE_SYSTEM)(void)
 594 {
 595         int ret;
 596         int i;
 597
 598         wrapper_vmalloc_sync_all();
 599         ret = TP_ID(__lttng_types_init__, TRACE_SYSTEM)();
 600         if (ret)
 601                 return ret;
 602         for (i = 0; i < ARRAY_SIZE(TP_ID(__event_desc___, TRACE_SYSTEM)); i++) {
 603                 const struct lttng_event_desc *event_desc;
 604
 605                 event_desc = &TP_ID(__event_desc___, TRACE_SYSTEM)[i];
 606                 ret = ltt_probe_register(event_desc->name,
 607                                          event_desc->probe_callback);
 608                 if (ret)
 609                         goto error;
 610         }
 611         return 0;
 612
 613 error:
 614         for (i--; i >= 0; i--) {
 615                 const struct lttng_event_desc *event_desc;
 616
 617                 event_desc = &TP_ID(__event_desc___, TRACE_SYSTEM)[i];
 618                 ltt_probe_unregister(event_desc->name);
 619         }
 620         return ret;
 621 }
 622
 623 module_init_eval(__lttng_events_init__, TRACE_SYSTEM);
 624
 625 static void TP_ID(__lttng_events_exit__, TRACE_SYSTEM)(void)
 626 {
 627         int i;
 628
 629         for (i = 0; i < ARRAY_SIZE(TP_ID(__event_desc___, TRACE_SYSTEM)); i++) {
 630                 const struct lttng_event_desc *event_desc;
 631
 632                 event_desc = &TP_ID(__event_desc___, TRACE_SYSTEM)[i];
 633                 ltt_probe_unregister(event_desc->name);
 634         }
 635         TP_ID(__lttng_types_exit__, TRACE_SYSTEM)();
 636 }
 637
 638 module_exit_eval(__lttng_events_exit__, TRACE_SYSTEM);
 639
 640 #undef module_init_eval
 641 #undef module_exit_eval
 642 #undef TP_ID1
 643 #undef TP_ID