liblttng-ust/ust-events-internal.h

   1 /*
   2  * SPDX-License-Identifier: MIT
   3  *
   4  * Copyright 2019 (c) Francis Deslauriers <francis.deslauriers@efficios.com>
   5  */
   6
   7 #ifndef _LTTNG_UST_EVENTS_INTERNAL_H
   8 #define _LTTNG_UST_EVENTS_INTERNAL_H
   9
  10 #include <stdint.h>
  11
  12 #include <urcu/list.h>
  13 #include <urcu/hlist.h>
  14
  15 #include <lttng/ust-events.h>
  16
  17 #include <ust-helper.h>
  18 #include "ust-context-provider.h"
  19
  20 struct lttng_ust_abi_obj;
  21 struct lttng_event_notifier_group;
  22
  23 union lttng_ust_abi_args {
  24         struct {
  25                 void *chan_data;
  26                 int wakeup_fd;
  27         } channel;
  28         struct {
  29                 int shm_fd;
  30                 int wakeup_fd;
  31         } stream;
  32         struct {
  33                 struct lttng_ust_abi_field_iter entry;
  34         } field_list;
  35         struct {
  36                 char *ctxname;
  37         } app_context;
  38         struct {
  39                 int event_notifier_notif_fd;
  40         } event_notifier_handle;
  41         struct {
  42                 void *counter_data;
  43         } counter;
  44         struct {
  45                 int shm_fd;
  46         } counter_shm;
  47 };
  48
  49 struct lttng_ust_abi_objd_ops {
  50         long (*cmd)(int objd, unsigned int cmd, unsigned long arg,
  51                 union lttng_ust_abi_args *args, void *owner);
  52         int (*release)(int objd);
  53 };
  54
  55 enum lttng_enabler_format_type {
  56         LTTNG_ENABLER_FORMAT_STAR_GLOB,
  57         LTTNG_ENABLER_FORMAT_EVENT,
  58 };
  59
  60 /*
  61  * Enabler field, within whatever object is enabling an event. Target of
  62  * backward reference.
  63  */
  64 struct lttng_enabler {
  65         enum lttng_enabler_format_type format_type;
  66
  67         /* head list of struct lttng_ust_filter_bytecode_node */
  68         struct cds_list_head filter_bytecode_head;
  69         /* head list of struct lttng_ust_excluder_node */
  70         struct cds_list_head excluder_head;
  71
  72         struct lttng_ust_abi_event event_param;
  73         unsigned int enabled:1;
  74 };
  75
  76 struct lttng_event_enabler {
  77         struct lttng_enabler base;
  78         struct cds_list_head node;      /* per-session list of enablers */
  79         struct lttng_ust_channel_buffer *chan;
  80         /*
  81          * Unused, but kept around to make it explicit that the tracer can do
  82          * it.
  83          */
  84         struct lttng_ust_ctx *ctx;
  85 };
  86
  87 struct lttng_event_notifier_enabler {
  88         struct lttng_enabler base;
  89         uint64_t error_counter_index;
  90         struct cds_list_head node;      /* per-app list of event_notifier enablers */
  91         struct cds_list_head capture_bytecode_head;
  92         struct lttng_event_notifier_group *group; /* weak ref */
  93         uint64_t user_token;            /* User-provided token */
  94         uint64_t num_captures;
  95 };
  96
  97 enum lttng_ust_bytecode_node_type {
  98         LTTNG_UST_BYTECODE_NODE_TYPE_FILTER,
  99         LTTNG_UST_BYTECODE_NODE_TYPE_CAPTURE,
 100 };
 101
 102 struct lttng_ust_bytecode_node {
 103         enum lttng_ust_bytecode_node_type type;
 104         struct cds_list_head node;
 105         struct lttng_enabler *enabler;
 106         struct  {
 107                 uint32_t len;
 108                 uint32_t reloc_offset;
 109                 uint64_t seqnum;
 110                 char data[];
 111         } bc;
 112 };
 113
 114 struct lttng_ust_excluder_node {
 115         struct cds_list_head node;
 116         struct lttng_enabler *enabler;
 117         /*
 118          * struct lttng_ust_event_exclusion had variable sized array,
 119          * must be last field.
 120          */
 121         struct lttng_ust_abi_event_exclusion excluder;
 122 };
 123
 124 /* Data structures used by the tracer. */
 125
 126 struct tp_list_entry {
 127         struct lttng_ust_abi_tracepoint_iter tp;
 128         struct cds_list_head head;
 129 };
 130
 131 struct lttng_ust_tracepoint_list {
 132         struct tp_list_entry *iter;
 133         struct cds_list_head head;
 134 };
 135
 136 struct tp_field_list_entry {
 137         struct lttng_ust_abi_field_iter field;
 138         struct cds_list_head head;
 139 };
 140
 141 struct lttng_ust_field_list {
 142         struct tp_field_list_entry *iter;
 143         struct cds_list_head head;
 144 };
 145
 146 /*
 147  * Objects in a linked-list of enablers, owned by an event or event_notifier.
 148  * This is used because an event (or a event_notifier) can be enabled by more
 149  * than one enabler and we want a quick way to iterate over all enablers of an
 150  * object.
 151  *
 152  * For example, event rules "my_app:a*" and "my_app:ab*" will both match the
 153  * event with the name "my_app:abc".
 154  */
 155 struct lttng_enabler_ref {
 156         struct cds_list_head node;              /* enabler ref list */
 157         struct lttng_enabler *ref;              /* backward ref */
 158 };
 159
 160 #define LTTNG_COUNTER_DIMENSION_MAX     8
 161 struct lttng_counter_dimension {
 162         uint64_t size;
 163         uint64_t underflow_index;
 164         uint64_t overflow_index;
 165         uint8_t has_underflow;
 166         uint8_t has_overflow;
 167 };
 168
 169 struct lttng_counter_ops {
 170         struct lib_counter *(*counter_create)(size_t nr_dimensions,
 171                         const struct lttng_counter_dimension *dimensions,
 172                         int64_t global_sum_step,
 173                         int global_counter_fd,
 174                         int nr_counter_cpu_fds,
 175                         const int *counter_cpu_fds,
 176                         bool is_daemon);
 177         void (*counter_destroy)(struct lib_counter *counter);
 178         int (*counter_add)(struct lib_counter *counter,
 179                         const size_t *dimension_indexes, int64_t v);
 180         int (*counter_read)(struct lib_counter *counter,
 181                         const size_t *dimension_indexes, int cpu,
 182                         int64_t *value, bool *overflow, bool *underflow);
 183         int (*counter_aggregate)(struct lib_counter *counter,
 184                         const size_t *dimension_indexes, int64_t *value,
 185                         bool *overflow, bool *underflow);
 186         int (*counter_clear)(struct lib_counter *counter, const size_t *dimension_indexes);
 187 };
 188
 189 struct lttng_counter {
 190         int objd;
 191         struct lttng_event_notifier_group *event_notifier_group;    /* owner */
 192         struct lttng_counter_transport *transport;
 193         struct lib_counter *counter;
 194         struct lttng_counter_ops *ops;
 195 };
 196
 197 #define LTTNG_UST_EVENT_HT_BITS         12
 198 #define LTTNG_UST_EVENT_HT_SIZE         (1U << LTTNG_UST_EVENT_HT_BITS)
 199
 200 struct lttng_ust_event_ht {
 201         struct cds_hlist_head table[LTTNG_UST_EVENT_HT_SIZE];
 202 };
 203
 204 #define LTTNG_UST_EVENT_NOTIFIER_HT_BITS                12
 205 #define LTTNG_UST_EVENT_NOTIFIER_HT_SIZE                (1U << LTTNG_UST_EVENT_NOTIFIER_HT_BITS)
 206 struct lttng_ust_event_notifier_ht {
 207         struct cds_hlist_head table[LTTNG_UST_EVENT_NOTIFIER_HT_SIZE];
 208 };
 209
 210 #define LTTNG_UST_ENUM_HT_BITS          12
 211 #define LTTNG_UST_ENUM_HT_SIZE          (1U << LTTNG_UST_ENUM_HT_BITS)
 212
 213 struct lttng_ust_enum_ht {
 214         struct cds_hlist_head table[LTTNG_UST_ENUM_HT_SIZE];
 215 };
 216
 217 struct lttng_event_notifier_group {
 218         int objd;
 219         void *owner;
 220         int notification_fd;
 221         struct cds_list_head node;              /* Event notifier group handle list */
 222         struct cds_list_head enablers_head;
 223         struct cds_list_head event_notifiers_head;      /* list of event_notifiers */
 224         struct lttng_ust_event_notifier_ht event_notifiers_ht; /* hashtable of event_notifiers */
 225         struct lttng_ust_ctx *ctx;                      /* contexts for filters. */
 226
 227         struct lttng_counter *error_counter;
 228         size_t error_counter_len;
 229 };
 230
 231 struct lttng_transport {
 232         char *name;
 233         struct cds_list_head node;
 234         struct lttng_ust_channel_ops ops;
 235         const struct lttng_ust_lib_ring_buffer_config *client_config;
 236 };
 237
 238 struct lttng_counter_transport {
 239         char *name;
 240         struct cds_list_head node;
 241         struct lttng_counter_ops ops;
 242         const struct lib_counter_config *client_config;
 243 };
 244
 245 struct lttng_ust_event_common_private {
 246         struct lttng_ust_event_common *pub;     /* Public event interface */
 247
 248         struct lttng_ust_event_desc *desc;
 249         /* Backward references: list of lttng_enabler_ref (ref to enablers) */
 250         struct cds_list_head enablers_ref_head;
 251         int registered;                 /* has reg'd tracepoint probe */
 252         uint64_t user_token;
 253 };
 254
 255 struct lttng_ust_event_recorder_private {
 256         struct lttng_ust_event_common_private parent;
 257
 258         struct lttng_ust_event_recorder *pub;   /* Public event interface */
 259         struct cds_list_head node;              /* Event recorder list */
 260         struct cds_hlist_node hlist;            /* Hash table of event recorders */
 261         struct lttng_ust_ctx *ctx;
 262 };
 263
 264 struct lttng_ust_event_notifier_private {
 265         struct lttng_ust_event_common_private parent;
 266
 267         struct lttng_ust_event_notifier *pub;   /* Public event notifier interface */
 268         struct lttng_event_notifier_group *group; /* weak ref */
 269         size_t num_captures;                    /* Needed to allocate the msgpack array. */
 270         uint64_t error_counter_index;
 271         struct cds_list_head node;              /* Event notifier list */
 272         struct cds_hlist_node hlist;            /* Hash table of event notifiers */
 273 };
 274
 275 struct lttng_ust_bytecode_runtime_private {
 276         struct bytecode_runtime *pub;   /* Public bytecode runtime interface */
 277
 278         struct lttng_ust_bytecode_node *bc;
 279         int link_failed;
 280         /*
 281          * Pointer to a URCU-protected pointer owned by an `struct
 282          * lttng_session`or `struct lttng_event_notifier_group`.
 283          */
 284         struct lttng_ust_ctx **pctx;
 285 };
 286
 287 struct lttng_ust_session_private {
 288         struct lttng_ust_session *pub;          /* Public session interface */
 289
 290         int been_active;                        /* Been active ? */
 291         int objd;                               /* Object associated */
 292         struct cds_list_head chan_head;         /* Channel list head */
 293         struct cds_list_head events_head;       /* list of events */
 294         struct cds_list_head node;              /* Session list */
 295
 296         /* New UST 2.1 */
 297         /* List of enablers */
 298         struct cds_list_head enablers_head;
 299         struct lttng_ust_event_ht events_ht;    /* ht of events */
 300         void *owner;                            /* object owner */
 301         int tstate:1;                           /* Transient enable state */
 302
 303         /* New UST 2.4 */
 304         int statedump_pending:1;
 305
 306         /* New UST 2.8 */
 307         struct lttng_ust_enum_ht enums_ht;      /* ht of enumerations */
 308         struct cds_list_head enums_head;
 309         struct lttng_ust_ctx *ctx;                      /* contexts for filters. */
 310 };
 311
 312 struct lttng_enum {
 313         struct lttng_ust_enum_desc *desc;
 314         struct lttng_ust_session *session;
 315         struct cds_list_head node;      /* Enum list in session */
 316         struct cds_hlist_node hlist;    /* Session ht of enums */
 317         uint64_t id;                    /* Enumeration ID in sessiond */
 318 };
 319
 320 struct lttng_ust_shm_handle;
 321
 322 struct lttng_ust_channel_ops_private {
 323         struct lttng_ust_channel_ops *pub;      /* Public channels ops interface */
 324
 325         struct lttng_ust_channel_buffer *(*channel_create)(const char *name,
 326                         void *buf_addr,
 327                         size_t subbuf_size, size_t num_subbuf,
 328                         unsigned int switch_timer_interval,
 329                         unsigned int read_timer_interval,
 330                         unsigned char *uuid,
 331                         uint32_t chan_id,
 332                         const int *stream_fds, int nr_stream_fds,
 333                         int64_t blocking_timeout);
 334         void (*channel_destroy)(struct lttng_ust_channel_buffer *chan);
 335         /*
 336          * packet_avail_size returns the available size in the current
 337          * packet. Note that the size returned is only a hint, since it
 338          * may change due to concurrent writes.
 339          */
 340         size_t (*packet_avail_size)(struct lttng_ust_lib_ring_buffer_channel *chan,
 341                                     struct lttng_ust_shm_handle *handle);
 342         int (*is_finalized)(struct lttng_ust_lib_ring_buffer_channel *chan);
 343         int (*is_disabled)(struct lttng_ust_lib_ring_buffer_channel *chan);
 344         int (*flush_buffer)(struct lttng_ust_lib_ring_buffer_channel *chan,
 345                             struct lttng_ust_shm_handle *handle);
 346 };
 347
 348 struct lttng_ust_channel_common_private {
 349         struct lttng_ust_channel_common *pub;   /* Public channel interface */
 350
 351         int objd;       /* Object associated with channel. */
 352         int tstate:1;                   /* Transient enable state */
 353 };
 354
 355 struct lttng_ust_channel_buffer_private {
 356         struct lttng_ust_channel_common_private parent;
 357
 358         struct lttng_ust_channel_buffer *pub;   /* Public channel buffer interface */
 359         struct cds_list_head node;      /* Channel list in session */
 360         int header_type;                /* 0: unset, 1: compact, 2: large */
 361         unsigned int id;                /* Channel ID */
 362         enum lttng_ust_abi_chan_type type;
 363         struct lttng_ust_ctx *ctx;
 364         unsigned char uuid[LTTNG_UST_UUID_LEN]; /* Trace session unique ID */
 365 };
 366
 367 /*
 368  * IMPORTANT: this structure is part of the ABI between the consumer
 369  * daemon and the UST library within traced applications. Changing it
 370  * breaks the UST communication protocol.
 371  *
 372  * TODO: remove unused fields on next UST communication protocol
 373  * breaking update.
 374  */
 375 struct lttng_ust_abi_channel_config {
 376         void *unused1;
 377         int unused2;
 378         void *unused3;
 379         void *unused4;
 380         int unused5;
 381         struct cds_list_head unused6;
 382         void *unused7;
 383         int unused8;
 384         void *unused9;
 385
 386         /* Channel ID */
 387         unsigned int id;
 388         enum lttng_ust_abi_chan_type unused10;
 389         unsigned char uuid[LTTNG_UST_UUID_LEN]; /* Trace session unique ID */
 390         int unused11:1;
 391 };
 392
 393 static inline
 394 struct lttng_ust_type_integer *lttng_ust_get_type_integer(struct lttng_ust_type_common *type)
 395 {
 396         if (type->type != lttng_ust_type_integer)
 397                 return NULL;
 398         return caa_container_of(type, struct lttng_ust_type_integer, parent);
 399 }
 400
 401 static inline
 402 struct lttng_ust_type_float *lttng_ust_get_type_float(struct lttng_ust_type_common *type)
 403 {
 404         if (type->type != lttng_ust_type_float)
 405                 return NULL;
 406         return caa_container_of(type, struct lttng_ust_type_float, parent);
 407 }
 408
 409 static inline
 410 struct lttng_ust_type_string *lttng_ust_get_type_string(struct lttng_ust_type_common *type)
 411 {
 412         if (type->type != lttng_ust_type_string)
 413                 return NULL;
 414         return caa_container_of(type, struct lttng_ust_type_string, parent);
 415 }
 416
 417 static inline
 418 struct lttng_ust_type_enum *lttng_ust_get_type_enum(struct lttng_ust_type_common *type)
 419 {
 420         if (type->type != lttng_ust_type_enum)
 421                 return NULL;
 422         return caa_container_of(type, struct lttng_ust_type_enum, parent);
 423 }
 424
 425 static inline
 426 struct lttng_ust_type_array *lttng_ust_get_type_array(struct lttng_ust_type_common *type)
 427 {
 428         if (type->type != lttng_ust_type_array)
 429                 return NULL;
 430         return caa_container_of(type, struct lttng_ust_type_array, parent);
 431 }
 432
 433 static inline
 434 struct lttng_ust_type_sequence *lttng_ust_get_type_sequence(struct lttng_ust_type_common *type)
 435 {
 436         if (type->type != lttng_ust_type_sequence)
 437                 return NULL;
 438         return caa_container_of(type, struct lttng_ust_type_sequence, parent);
 439 }
 440
 441 static inline
 442 struct lttng_ust_type_struct *lttng_ust_get_type_struct(struct lttng_ust_type_common *type)
 443 {
 444         if (type->type != lttng_ust_type_struct)
 445                 return NULL;
 446         return caa_container_of(type, struct lttng_ust_type_struct, parent);
 447 }
 448
 449 /* Create dynamically allocated types. */
 450 static inline
 451 struct lttng_ust_type_common *lttng_ust_create_type_integer(unsigned int size,
 452                 unsigned short alignment, bool signedness, unsigned int byte_order,
 453                 unsigned int base)
 454 {
 455         struct lttng_ust_type_integer *integer_type;
 456
 457         integer_type = zmalloc(sizeof(struct lttng_ust_type_integer));
 458         if (!integer_type)
 459                 return NULL;
 460         integer_type->parent.type = lttng_ust_type_integer;
 461         integer_type->struct_size = sizeof(struct lttng_ust_type_integer);
 462         integer_type->size = size;
 463         integer_type->alignment = alignment;
 464         integer_type->signedness = signedness;
 465         integer_type->reverse_byte_order = byte_order != BYTE_ORDER;
 466         integer_type->base = base;
 467         return (struct lttng_ust_type_common *) integer_type;
 468 }
 469
 470 static inline
 471 struct lttng_ust_type_common *lttng_ust_create_type_array_text(unsigned int length)
 472 {
 473         struct lttng_ust_type_array *array_type;
 474
 475         array_type = zmalloc(sizeof(struct lttng_ust_type_array));
 476         if (!array_type)
 477                 return NULL;
 478         array_type->parent.type = lttng_ust_type_array;
 479         array_type->struct_size = sizeof(struct lttng_ust_type_array);
 480         array_type->length = length;
 481         array_type->alignment = 0;
 482         array_type->encoding = lttng_ust_string_encoding_UTF8;
 483         array_type->elem_type = lttng_ust_create_type_integer(sizeof(char) * CHAR_BIT,
 484                         lttng_alignof(char) * CHAR_BIT, lttng_is_signed_type(char),
 485                         BYTE_ORDER, 10);
 486         if (!array_type->elem_type)
 487                 goto error_elem;
 488         return (struct lttng_ust_type_common *) array_type;
 489
 490 error_elem:
 491         free(array_type);
 492         return NULL;
 493 }
 494
 495 /*
 496  * Destroy dynamically allocated types, including nested types.
 497  * For enumerations, it does not free the enumeration mapping description.
 498  */
 499 static inline
 500 void lttng_ust_destroy_type(struct lttng_ust_type_common *type)
 501 {
 502         if (!type)
 503                 return;
 504
 505         switch (type->type) {
 506         case lttng_ust_type_integer:
 507         case lttng_ust_type_string:
 508         case lttng_ust_type_float:
 509         case lttng_ust_type_dynamic:
 510                 free(type);
 511                 break;
 512         case lttng_ust_type_enum:
 513         {
 514                 struct lttng_ust_type_enum *enum_type = (struct lttng_ust_type_enum *) type;
 515
 516                 lttng_ust_destroy_type(enum_type->container_type);
 517                 free(enum_type);
 518                 break;
 519         }
 520         case lttng_ust_type_array:
 521         {
 522                 struct lttng_ust_type_array *array_type = (struct lttng_ust_type_array *) type;
 523
 524                 lttng_ust_destroy_type(array_type->elem_type);
 525                 free(array_type);
 526                 break;
 527         }
 528         case lttng_ust_type_sequence:
 529         {
 530                 struct lttng_ust_type_sequence *sequence_type = (struct lttng_ust_type_sequence *) type;
 531
 532                 lttng_ust_destroy_type(sequence_type->elem_type);
 533                 free(sequence_type);
 534                 break;
 535         }
 536         case lttng_ust_type_struct:
 537         {
 538                 struct lttng_ust_type_struct *struct_type = (struct lttng_ust_type_struct *) type;
 539                 unsigned int i;
 540
 541                 for (i = 0; i < struct_type->nr_fields; i++)
 542                         lttng_ust_destroy_type(struct_type->fields[i]->type);
 543                 free(struct_type);
 544                 break;
 545         }
 546         default:
 547                 abort();
 548         }
 549 }
 550
 551 static inline
 552 struct lttng_enabler *lttng_event_enabler_as_enabler(
 553                 struct lttng_event_enabler *event_enabler)
 554 {
 555         return &event_enabler->base;
 556 }
 557
 558 static inline
 559 struct lttng_enabler *lttng_event_notifier_enabler_as_enabler(
 560                 struct lttng_event_notifier_enabler *event_notifier_enabler)
 561 {
 562         return &event_notifier_enabler->base;
 563 }
 564
 565 /*
 566  * Allocate and initialize a `struct lttng_event_enabler` object.
 567  *
 568  * On success, returns a `struct lttng_event_enabler`,
 569  * On memory error, returns NULL.
 570  */
 571 __attribute__((visibility("hidden")))
 572 struct lttng_event_enabler *lttng_event_enabler_create(
 573                 enum lttng_enabler_format_type format_type,
 574                 struct lttng_ust_abi_event *event_param,
 575                 struct lttng_ust_channel_buffer *chan);
 576
 577 /*
 578  * Destroy a `struct lttng_event_enabler` object.
 579  */
 580 __attribute__((visibility("hidden")))
 581 void lttng_event_enabler_destroy(struct lttng_event_enabler *enabler);
 582
 583 /*
 584  * Enable a `struct lttng_event_enabler` object and all events related to this
 585  * enabler.
 586  */
 587 __attribute__((visibility("hidden")))
 588 int lttng_event_enabler_enable(struct lttng_event_enabler *enabler);
 589
 590 /*
 591  * Disable a `struct lttng_event_enabler` object and all events related to this
 592  * enabler.
 593  */
 594 __attribute__((visibility("hidden")))
 595 int lttng_event_enabler_disable(struct lttng_event_enabler *enabler);
 596
 597 /*
 598  * Attach filter bytecode program to `struct lttng_event_enabler` and all
 599  * events related to this enabler.
 600  */
 601 __attribute__((visibility("hidden")))
 602 int lttng_event_enabler_attach_filter_bytecode(
 603                 struct lttng_event_enabler *enabler,
 604                 struct lttng_ust_bytecode_node **bytecode);
 605
 606 /*
 607  * Attach an application context to an event enabler.
 608  *
 609  * Not implemented.
 610  */
 611 __attribute__((visibility("hidden")))
 612 int lttng_event_enabler_attach_context(struct lttng_event_enabler *enabler,
 613                 struct lttng_ust_abi_context *ctx);
 614
 615 /*
 616  * Attach exclusion list to `struct lttng_event_enabler` and all
 617  * events related to this enabler.
 618  */
 619 __attribute__((visibility("hidden")))
 620 int lttng_event_enabler_attach_exclusion(struct lttng_event_enabler *enabler,
 621                 struct lttng_ust_excluder_node **excluder);
 622
 623 /*
 624  * Synchronize bytecodes for the enabler and the instance (event or
 625  * event_notifier).
 626  *
 627  * This function goes over all bytecode programs of the enabler (event or
 628  * event_notifier enabler) to ensure each is linked to the provided instance.
 629  */
 630 __attribute__((visibility("hidden")))
 631 void lttng_enabler_link_bytecode(struct lttng_ust_event_desc *event_desc,
 632                 struct lttng_ust_ctx **ctx,
 633                 struct cds_list_head *instance_bytecode_runtime_head,
 634                 struct cds_list_head *enabler_bytecode_runtime_head);
 635
 636 /*
 637  * Allocate and initialize a `struct lttng_event_notifier_group` object.
 638  *
 639  * On success, returns a `struct lttng_triggre_group`,
 640  * on memory error, returns NULL.
 641  */
 642 __attribute__((visibility("hidden")))
 643 struct lttng_event_notifier_group *lttng_event_notifier_group_create(void);
 644
 645 /*
 646  * Destroy a `struct lttng_event_notifier_group` object.
 647  */
 648 __attribute__((visibility("hidden")))
 649 void lttng_event_notifier_group_destroy(
 650                 struct lttng_event_notifier_group *event_notifier_group);
 651
 652 /*
 653  * Allocate and initialize a `struct lttng_event_notifier_enabler` object.
 654  *
 655  * On success, returns a `struct lttng_event_notifier_enabler`,
 656  * On memory error, returns NULL.
 657  */
 658 __attribute__((visibility("hidden")))
 659 struct lttng_event_notifier_enabler *lttng_event_notifier_enabler_create(
 660                 struct lttng_event_notifier_group *event_notifier_group,
 661                 enum lttng_enabler_format_type format_type,
 662                 struct lttng_ust_abi_event_notifier *event_notifier_param);
 663
 664 /*
 665  * Destroy a `struct lttng_event_notifier_enabler` object.
 666  */
 667 __attribute__((visibility("hidden")))
 668 void lttng_event_notifier_enabler_destroy(
 669                 struct lttng_event_notifier_enabler *event_notifier_enabler);
 670
 671 /*
 672  * Enable a `struct lttng_event_notifier_enabler` object and all event
 673  * notifiers related to this enabler.
 674  */
 675 __attribute__((visibility("hidden")))
 676 int lttng_event_notifier_enabler_enable(
 677                 struct lttng_event_notifier_enabler *event_notifier_enabler);
 678
 679 /*
 680  * Disable a `struct lttng_event_notifier_enabler` object and all event
 681  * notifiers related to this enabler.
 682  */
 683 __attribute__((visibility("hidden")))
 684 int lttng_event_notifier_enabler_disable(
 685                 struct lttng_event_notifier_enabler *event_notifier_enabler);
 686
 687 /*
 688  * Attach filter bytecode program to `struct lttng_event_notifier_enabler` and
 689  * all event notifiers related to this enabler.
 690  */
 691 __attribute__((visibility("hidden")))
 692 int lttng_event_notifier_enabler_attach_filter_bytecode(
 693                 struct lttng_event_notifier_enabler *event_notifier_enabler,
 694                 struct lttng_ust_bytecode_node **bytecode);
 695
 696 /*
 697  * Attach capture bytecode program to `struct lttng_event_notifier_enabler` and
 698  * all event_notifiers related to this enabler.
 699  */
 700 __attribute__((visibility("hidden")))
 701 int lttng_event_notifier_enabler_attach_capture_bytecode(
 702                 struct lttng_event_notifier_enabler *event_notifier_enabler,
 703                 struct lttng_ust_bytecode_node **bytecode);
 704
 705 /*
 706  * Attach exclusion list to `struct lttng_event_notifier_enabler` and all
 707  * event notifiers related to this enabler.
 708  */
 709 __attribute__((visibility("hidden")))
 710 int lttng_event_notifier_enabler_attach_exclusion(
 711                 struct lttng_event_notifier_enabler *event_notifier_enabler,
 712                 struct lttng_ust_excluder_node **excluder);
 713
 714 __attribute__((visibility("hidden")))
 715 void lttng_free_event_filter_runtime(struct lttng_ust_event_common *event);
 716
 717 /*
 718  * Connect the probe on all enablers matching this event description.
 719  * Called on library load.
 720  */
 721 __attribute__((visibility("hidden")))
 722 int lttng_fix_pending_event_notifiers(void);
 723
 724 __attribute__((visibility("hidden")))
 725 struct lttng_counter *lttng_ust_counter_create(
 726                 const char *counter_transport_name,
 727                 size_t number_dimensions, const struct lttng_counter_dimension *dimensions);
 728
 729 #ifdef HAVE_PERF_EVENT
 730
 731 __attribute__((visibility("hidden")))
 732 int lttng_add_perf_counter_to_ctx(uint32_t type,
 733                                   uint64_t config,
 734                                   const char *name,
 735                                   struct lttng_ust_ctx **ctx);
 736
 737 __attribute__((visibility("hidden")))
 738 int lttng_perf_counter_init(void);
 739
 740 __attribute__((visibility("hidden")))
 741 void lttng_perf_counter_exit(void);
 742
 743 #else /* #ifdef HAVE_PERF_EVENT */
 744
 745 static inline
 746 int lttng_add_perf_counter_to_ctx(uint32_t type,
 747                                   uint64_t config,
 748                                   const char *name,
 749                                   struct lttng_ust_ctx **ctx)
 750 {
 751         return -ENOSYS;
 752 }
 753 static inline
 754 int lttng_perf_counter_init(void)
 755 {
 756         return 0;
 757 }
 758 static inline
 759 void lttng_perf_counter_exit(void)
 760 {
 761 }
 762 #endif /* #else #ifdef HAVE_PERF_EVENT */
 763
 764 __attribute__((visibility("hidden")))
 765 int lttng_probes_get_event_list(struct lttng_ust_tracepoint_list *list);
 766
 767 __attribute__((visibility("hidden")))
 768 void lttng_probes_prune_event_list(struct lttng_ust_tracepoint_list *list);
 769
 770 __attribute__((visibility("hidden")))
 771 int lttng_probes_get_field_list(struct lttng_ust_field_list *list);
 772
 773 __attribute__((visibility("hidden")))
 774 void lttng_probes_prune_field_list(struct lttng_ust_field_list *list);
 775
 776 __attribute__((visibility("hidden")))
 777 struct lttng_ust_abi_tracepoint_iter *
 778         lttng_ust_tracepoint_list_get_iter_next(struct lttng_ust_tracepoint_list *list);
 779
 780 __attribute__((visibility("hidden")))
 781 struct lttng_ust_abi_field_iter *
 782         lttng_ust_field_list_get_iter_next(struct lttng_ust_field_list *list);
 783
 784 __attribute__((visibility("hidden")))
 785 struct lttng_ust_session *lttng_session_create(void);
 786
 787 __attribute__((visibility("hidden")))
 788 int lttng_session_enable(struct lttng_ust_session *session);
 789
 790 __attribute__((visibility("hidden")))
 791 int lttng_session_disable(struct lttng_ust_session *session);
 792
 793 __attribute__((visibility("hidden")))
 794 int lttng_session_statedump(struct lttng_ust_session *session);
 795
 796 __attribute__((visibility("hidden")))
 797 void lttng_session_destroy(struct lttng_ust_session *session);
 798
 799 /*
 800  * Called with ust lock held.
 801  */
 802 __attribute__((visibility("hidden")))
 803 int lttng_session_active(void);
 804
 805 __attribute__((visibility("hidden")))
 806 struct cds_list_head *lttng_get_sessions(void);
 807
 808 __attribute__((visibility("hidden")))
 809 void lttng_handle_pending_statedump(void *owner);
 810
 811 __attribute__((visibility("hidden")))
 812 int lttng_channel_enable(struct lttng_ust_channel_common *lttng_channel);
 813
 814 __attribute__((visibility("hidden")))
 815 int lttng_channel_disable(struct lttng_ust_channel_common *lttng_channel);
 816
 817 __attribute__((visibility("hidden")))
 818 void lttng_transport_register(struct lttng_transport *transport);
 819
 820 __attribute__((visibility("hidden")))
 821 void lttng_transport_unregister(struct lttng_transport *transport);
 822
 823 /* This is ABI between liblttng-ust and liblttng-ust-ctl */
 824 struct lttng_transport *lttng_ust_transport_find(const char *name);
 825
 826 /* This is ABI between liblttng-ust and liblttng-ust-dl */
 827 void lttng_ust_dl_update(void *ip);
 828
 829 __attribute__((visibility("hidden")))
 830 void lttng_probe_provider_unregister_events(struct lttng_ust_probe_desc *desc);
 831
 832 __attribute__((visibility("hidden")))
 833 int lttng_fix_pending_events(void);
 834
 835 __attribute__((visibility("hidden")))
 836 struct cds_list_head *lttng_get_probe_list_head(void);
 837
 838 __attribute__((visibility("hidden")))
 839 struct lttng_enum *lttng_ust_enum_get_from_desc(struct lttng_ust_session *session,
 840                 struct lttng_ust_enum_desc *enum_desc);
 841
 842 __attribute__((visibility("hidden")))
 843 int lttng_abi_create_root_handle(void);
 844
 845 __attribute__((visibility("hidden")))
 846 const struct lttng_ust_abi_objd_ops *lttng_ust_abi_objd_ops(int id);
 847
 848 __attribute__((visibility("hidden")))
 849 int lttng_ust_abi_objd_unref(int id, int is_owner);
 850
 851 __attribute__((visibility("hidden")))
 852 void lttng_ust_abi_exit(void);
 853
 854 __attribute__((visibility("hidden")))
 855 void lttng_ust_abi_events_exit(void);
 856
 857 __attribute__((visibility("hidden")))
 858 void lttng_ust_abi_objd_table_owner_cleanup(void *owner);
 859
 860 __attribute__((visibility("hidden")))
 861 struct lttng_ust_channel_buffer *lttng_ust_alloc_channel_buffer(void);
 862
 863 __attribute__((visibility("hidden")))
 864 void lttng_ust_free_channel_common(struct lttng_ust_channel_common *chan);
 865
 866 #endif /* _LTTNG_UST_EVENTS_INTERNAL_H */