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_channel *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 };
 262
 263 struct lttng_ust_event_notifier_private {
 264         struct lttng_ust_event_common_private parent;
 265
 266         struct lttng_ust_event_notifier *pub;   /* Public event notifier interface */
 267         struct lttng_event_notifier_group *group; /* weak ref */
 268         size_t num_captures;                    /* Needed to allocate the msgpack array. */
 269         uint64_t error_counter_index;
 270         struct cds_list_head node;              /* Event notifier list */
 271         struct cds_hlist_node hlist;            /* Hash table of event notifiers */
 272 };
 273
 274 struct lttng_ust_bytecode_runtime_private {
 275         struct bytecode_runtime *pub;   /* Public bytecode runtime interface */
 276
 277         struct lttng_ust_bytecode_node *bc;
 278         int link_failed;
 279         /*
 280          * Pointer to a URCU-protected pointer owned by an `struct
 281          * lttng_session`or `struct lttng_event_notifier_group`.
 282          */
 283         struct lttng_ust_ctx **pctx;
 284 };
 285
 286 struct lttng_ust_session_private {
 287         struct lttng_ust_session *pub;          /* Public session interface */
 288
 289         int been_active;                        /* Been active ? */
 290         int objd;                               /* Object associated */
 291         struct cds_list_head chan_head;         /* Channel list head */
 292         struct cds_list_head events_head;       /* list of events */
 293         struct cds_list_head node;              /* Session list */
 294
 295         /* New UST 2.1 */
 296         /* List of enablers */
 297         struct cds_list_head enablers_head;
 298         struct lttng_ust_event_ht events_ht;    /* ht of events */
 299         void *owner;                            /* object owner */
 300         int tstate:1;                           /* Transient enable state */
 301
 302         /* New UST 2.4 */
 303         int statedump_pending:1;
 304
 305         /* New UST 2.8 */
 306         struct lttng_ust_enum_ht enums_ht;      /* ht of enumerations */
 307         struct cds_list_head enums_head;
 308         struct lttng_ust_ctx *ctx;                      /* contexts for filters. */
 309 };
 310
 311 struct lttng_enum {
 312         struct lttng_ust_enum_desc *desc;
 313         struct lttng_ust_session *session;
 314         struct cds_list_head node;      /* Enum list in session */
 315         struct cds_hlist_node hlist;    /* Session ht of enums */
 316         uint64_t id;                    /* Enumeration ID in sessiond */
 317 };
 318
 319 struct lttng_ust_channel_ops_private {
 320         struct lttng_ust_channel_ops *pub;      /* Public channels ops interface */
 321
 322         struct lttng_channel *(*channel_create)(const char *name,
 323                         void *buf_addr,
 324                         size_t subbuf_size, size_t num_subbuf,
 325                         unsigned int switch_timer_interval,
 326                         unsigned int read_timer_interval,
 327                         unsigned char *uuid,
 328                         uint32_t chan_id,
 329                         const int *stream_fds, int nr_stream_fds,
 330                         int64_t blocking_timeout);
 331         void (*channel_destroy)(struct lttng_channel *chan);
 332         /*
 333          * packet_avail_size returns the available size in the current
 334          * packet. Note that the size returned is only a hint, since it
 335          * may change due to concurrent writes.
 336          */
 337         size_t (*packet_avail_size)(struct lttng_ust_lib_ring_buffer_channel *chan,
 338                                     struct lttng_ust_shm_handle *handle);
 339         int (*is_finalized)(struct lttng_ust_lib_ring_buffer_channel *chan);
 340         int (*is_disabled)(struct lttng_ust_lib_ring_buffer_channel *chan);
 341         int (*flush_buffer)(struct lttng_ust_lib_ring_buffer_channel *chan,
 342                             struct lttng_ust_shm_handle *handle);
 343 };
 344
 345 static inline
 346 struct lttng_ust_type_integer *lttng_ust_get_type_integer(struct lttng_ust_type_common *type)
 347 {
 348         if (type->type != lttng_ust_type_integer)
 349                 return NULL;
 350         return caa_container_of(type, struct lttng_ust_type_integer, parent);
 351 }
 352
 353 static inline
 354 struct lttng_ust_type_float *lttng_ust_get_type_float(struct lttng_ust_type_common *type)
 355 {
 356         if (type->type != lttng_ust_type_float)
 357                 return NULL;
 358         return caa_container_of(type, struct lttng_ust_type_float, parent);
 359 }
 360
 361 static inline
 362 struct lttng_ust_type_string *lttng_ust_get_type_string(struct lttng_ust_type_common *type)
 363 {
 364         if (type->type != lttng_ust_type_string)
 365                 return NULL;
 366         return caa_container_of(type, struct lttng_ust_type_string, parent);
 367 }
 368
 369 static inline
 370 struct lttng_ust_type_enum *lttng_ust_get_type_enum(struct lttng_ust_type_common *type)
 371 {
 372         if (type->type != lttng_ust_type_enum)
 373                 return NULL;
 374         return caa_container_of(type, struct lttng_ust_type_enum, parent);
 375 }
 376
 377 static inline
 378 struct lttng_ust_type_array *lttng_ust_get_type_array(struct lttng_ust_type_common *type)
 379 {
 380         if (type->type != lttng_ust_type_array)
 381                 return NULL;
 382         return caa_container_of(type, struct lttng_ust_type_array, parent);
 383 }
 384
 385 static inline
 386 struct lttng_ust_type_sequence *lttng_ust_get_type_sequence(struct lttng_ust_type_common *type)
 387 {
 388         if (type->type != lttng_ust_type_sequence)
 389                 return NULL;
 390         return caa_container_of(type, struct lttng_ust_type_sequence, parent);
 391 }
 392
 393 static inline
 394 struct lttng_ust_type_struct *lttng_ust_get_type_struct(struct lttng_ust_type_common *type)
 395 {
 396         if (type->type != lttng_ust_type_struct)
 397                 return NULL;
 398         return caa_container_of(type, struct lttng_ust_type_struct, parent);
 399 }
 400
 401 /* Create dynamically allocated types. */
 402 static inline
 403 struct lttng_ust_type_common *lttng_ust_create_type_integer(unsigned int size,
 404                 unsigned short alignment, bool signedness, unsigned int byte_order,
 405                 unsigned int base)
 406 {
 407         struct lttng_ust_type_integer *integer_type;
 408
 409         integer_type = zmalloc(sizeof(struct lttng_ust_type_integer));
 410         if (!integer_type)
 411                 return NULL;
 412         integer_type->parent.type = lttng_ust_type_integer;
 413         integer_type->struct_size = sizeof(struct lttng_ust_type_integer);
 414         integer_type->size = size;
 415         integer_type->alignment = alignment;
 416         integer_type->signedness = signedness;
 417         integer_type->reverse_byte_order = byte_order != BYTE_ORDER;
 418         integer_type->base = base;
 419         return (struct lttng_ust_type_common *) integer_type;
 420 }
 421
 422 static inline
 423 struct lttng_ust_type_common *lttng_ust_create_type_array_text(unsigned int length)
 424 {
 425         struct lttng_ust_type_array *array_type;
 426
 427         array_type = zmalloc(sizeof(struct lttng_ust_type_array));
 428         if (!array_type)
 429                 return NULL;
 430         array_type->parent.type = lttng_ust_type_array;
 431         array_type->struct_size = sizeof(struct lttng_ust_type_array);
 432         array_type->length = length;
 433         array_type->alignment = 0;
 434         array_type->encoding = lttng_ust_string_encoding_UTF8;
 435         array_type->elem_type = lttng_ust_create_type_integer(sizeof(char) * CHAR_BIT,
 436                         lttng_alignof(char) * CHAR_BIT, lttng_is_signed_type(char),
 437                         BYTE_ORDER, 10);
 438         if (!array_type->elem_type)
 439                 goto error_elem;
 440         return (struct lttng_ust_type_common *) array_type;
 441
 442 error_elem:
 443         free(array_type);
 444         return NULL;
 445 }
 446
 447 /*
 448  * Destroy dynamically allocated types, including nested types.
 449  * For enumerations, it does not free the enumeration mapping description.
 450  */
 451 static inline
 452 void lttng_ust_destroy_type(struct lttng_ust_type_common *type)
 453 {
 454         if (!type)
 455                 return;
 456
 457         switch (type->type) {
 458         case lttng_ust_type_integer:
 459         case lttng_ust_type_string:
 460         case lttng_ust_type_float:
 461         case lttng_ust_type_dynamic:
 462                 free(type);
 463                 break;
 464         case lttng_ust_type_enum:
 465         {
 466                 struct lttng_ust_type_enum *enum_type = (struct lttng_ust_type_enum *) type;
 467
 468                 lttng_ust_destroy_type(enum_type->container_type);
 469                 break;
 470         }
 471         case lttng_ust_type_array:
 472         {
 473                 struct lttng_ust_type_array *array_type = (struct lttng_ust_type_array *) type;
 474
 475                 lttng_ust_destroy_type(array_type->elem_type);
 476                 break;
 477         }
 478         case lttng_ust_type_sequence:
 479         {
 480                 struct lttng_ust_type_sequence *sequence_type = (struct lttng_ust_type_sequence *) type;
 481
 482                 lttng_ust_destroy_type(sequence_type->elem_type);
 483                 break;
 484         }
 485         case lttng_ust_type_struct:
 486         {
 487                 struct lttng_ust_type_struct *struct_type = (struct lttng_ust_type_struct *) type;
 488                 unsigned int i;
 489
 490                 for (i = 0; i < struct_type->nr_fields; i++)
 491                         lttng_ust_destroy_type(struct_type->fields[i]->type);
 492                 break;
 493         }
 494         default:
 495                 abort();
 496         }
 497 }
 498
 499 static inline
 500 struct lttng_enabler *lttng_event_enabler_as_enabler(
 501                 struct lttng_event_enabler *event_enabler)
 502 {
 503         return &event_enabler->base;
 504 }
 505
 506 static inline
 507 struct lttng_enabler *lttng_event_notifier_enabler_as_enabler(
 508                 struct lttng_event_notifier_enabler *event_notifier_enabler)
 509 {
 510         return &event_notifier_enabler->base;
 511 }
 512
 513 /*
 514  * Allocate and initialize a `struct lttng_event_enabler` object.
 515  *
 516  * On success, returns a `struct lttng_event_enabler`,
 517  * On memory error, returns NULL.
 518  */
 519 __attribute__((visibility("hidden")))
 520 struct lttng_event_enabler *lttng_event_enabler_create(
 521                 enum lttng_enabler_format_type format_type,
 522                 struct lttng_ust_abi_event *event_param,
 523                 struct lttng_channel *chan);
 524
 525 /*
 526  * Destroy a `struct lttng_event_enabler` object.
 527  */
 528 __attribute__((visibility("hidden")))
 529 void lttng_event_enabler_destroy(struct lttng_event_enabler *enabler);
 530
 531 /*
 532  * Enable a `struct lttng_event_enabler` object and all events related to this
 533  * enabler.
 534  */
 535 __attribute__((visibility("hidden")))
 536 int lttng_event_enabler_enable(struct lttng_event_enabler *enabler);
 537
 538 /*
 539  * Disable a `struct lttng_event_enabler` object and all events related to this
 540  * enabler.
 541  */
 542 __attribute__((visibility("hidden")))
 543 int lttng_event_enabler_disable(struct lttng_event_enabler *enabler);
 544
 545 /*
 546  * Attach filter bytecode program to `struct lttng_event_enabler` and all
 547  * events related to this enabler.
 548  */
 549 __attribute__((visibility("hidden")))
 550 int lttng_event_enabler_attach_filter_bytecode(
 551                 struct lttng_event_enabler *enabler,
 552                 struct lttng_ust_bytecode_node **bytecode);
 553
 554 /*
 555  * Attach an application context to an event enabler.
 556  *
 557  * Not implemented.
 558  */
 559 __attribute__((visibility("hidden")))
 560 int lttng_event_enabler_attach_context(struct lttng_event_enabler *enabler,
 561                 struct lttng_ust_abi_context *ctx);
 562
 563 /*
 564  * Attach exclusion list to `struct lttng_event_enabler` and all
 565  * events related to this enabler.
 566  */
 567 __attribute__((visibility("hidden")))
 568 int lttng_event_enabler_attach_exclusion(struct lttng_event_enabler *enabler,
 569                 struct lttng_ust_excluder_node **excluder);
 570
 571 /*
 572  * Synchronize bytecodes for the enabler and the instance (event or
 573  * event_notifier).
 574  *
 575  * This function goes over all bytecode programs of the enabler (event or
 576  * event_notifier enabler) to ensure each is linked to the provided instance.
 577  */
 578 __attribute__((visibility("hidden")))
 579 void lttng_enabler_link_bytecode(struct lttng_ust_event_desc *event_desc,
 580                 struct lttng_ust_ctx **ctx,
 581                 struct cds_list_head *instance_bytecode_runtime_head,
 582                 struct cds_list_head *enabler_bytecode_runtime_head);
 583
 584 /*
 585  * Allocate and initialize a `struct lttng_event_notifier_group` object.
 586  *
 587  * On success, returns a `struct lttng_triggre_group`,
 588  * on memory error, returns NULL.
 589  */
 590 __attribute__((visibility("hidden")))
 591 struct lttng_event_notifier_group *lttng_event_notifier_group_create(void);
 592
 593 /*
 594  * Destroy a `struct lttng_event_notifier_group` object.
 595  */
 596 __attribute__((visibility("hidden")))
 597 void lttng_event_notifier_group_destroy(
 598                 struct lttng_event_notifier_group *event_notifier_group);
 599
 600 /*
 601  * Allocate and initialize a `struct lttng_event_notifier_enabler` object.
 602  *
 603  * On success, returns a `struct lttng_event_notifier_enabler`,
 604  * On memory error, returns NULL.
 605  */
 606 __attribute__((visibility("hidden")))
 607 struct lttng_event_notifier_enabler *lttng_event_notifier_enabler_create(
 608                 struct lttng_event_notifier_group *event_notifier_group,
 609                 enum lttng_enabler_format_type format_type,
 610                 struct lttng_ust_abi_event_notifier *event_notifier_param);
 611
 612 /*
 613  * Destroy a `struct lttng_event_notifier_enabler` object.
 614  */
 615 __attribute__((visibility("hidden")))
 616 void lttng_event_notifier_enabler_destroy(
 617                 struct lttng_event_notifier_enabler *event_notifier_enabler);
 618
 619 /*
 620  * Enable a `struct lttng_event_notifier_enabler` object and all event
 621  * notifiers related to this enabler.
 622  */
 623 __attribute__((visibility("hidden")))
 624 int lttng_event_notifier_enabler_enable(
 625                 struct lttng_event_notifier_enabler *event_notifier_enabler);
 626
 627 /*
 628  * Disable a `struct lttng_event_notifier_enabler` object and all event
 629  * notifiers related to this enabler.
 630  */
 631 __attribute__((visibility("hidden")))
 632 int lttng_event_notifier_enabler_disable(
 633                 struct lttng_event_notifier_enabler *event_notifier_enabler);
 634
 635 /*
 636  * Attach filter bytecode program to `struct lttng_event_notifier_enabler` and
 637  * all event notifiers related to this enabler.
 638  */
 639 __attribute__((visibility("hidden")))
 640 int lttng_event_notifier_enabler_attach_filter_bytecode(
 641                 struct lttng_event_notifier_enabler *event_notifier_enabler,
 642                 struct lttng_ust_bytecode_node **bytecode);
 643
 644 /*
 645  * Attach capture bytecode program to `struct lttng_event_notifier_enabler` and
 646  * all event_notifiers related to this enabler.
 647  */
 648 __attribute__((visibility("hidden")))
 649 int lttng_event_notifier_enabler_attach_capture_bytecode(
 650                 struct lttng_event_notifier_enabler *event_notifier_enabler,
 651                 struct lttng_ust_bytecode_node **bytecode);
 652
 653 /*
 654  * Attach exclusion list to `struct lttng_event_notifier_enabler` and all
 655  * event notifiers related to this enabler.
 656  */
 657 __attribute__((visibility("hidden")))
 658 int lttng_event_notifier_enabler_attach_exclusion(
 659                 struct lttng_event_notifier_enabler *event_notifier_enabler,
 660                 struct lttng_ust_excluder_node **excluder);
 661
 662 __attribute__((visibility("hidden")))
 663 void lttng_free_event_filter_runtime(struct lttng_ust_event_common *event);
 664
 665 /*
 666  * Connect the probe on all enablers matching this event description.
 667  * Called on library load.
 668  */
 669 __attribute__((visibility("hidden")))
 670 int lttng_fix_pending_event_notifiers(void);
 671
 672 __attribute__((visibility("hidden")))
 673 struct lttng_counter *lttng_ust_counter_create(
 674                 const char *counter_transport_name,
 675                 size_t number_dimensions, const struct lttng_counter_dimension *dimensions);
 676
 677 #ifdef HAVE_PERF_EVENT
 678
 679 __attribute__((visibility("hidden")))
 680 int lttng_add_perf_counter_to_ctx(uint32_t type,
 681                                   uint64_t config,
 682                                   const char *name,
 683                                   struct lttng_ust_ctx **ctx);
 684
 685 __attribute__((visibility("hidden")))
 686 int lttng_perf_counter_init(void);
 687
 688 __attribute__((visibility("hidden")))
 689 void lttng_perf_counter_exit(void);
 690
 691 #else /* #ifdef HAVE_PERF_EVENT */
 692
 693 static inline
 694 int lttng_add_perf_counter_to_ctx(uint32_t type,
 695                                   uint64_t config,
 696                                   const char *name,
 697                                   struct lttng_ust_ctx **ctx)
 698 {
 699         return -ENOSYS;
 700 }
 701 static inline
 702 int lttng_perf_counter_init(void)
 703 {
 704         return 0;
 705 }
 706 static inline
 707 void lttng_perf_counter_exit(void)
 708 {
 709 }
 710 #endif /* #else #ifdef HAVE_PERF_EVENT */
 711
 712 __attribute__((visibility("hidden")))
 713 int lttng_probes_get_event_list(struct lttng_ust_tracepoint_list *list);
 714
 715 __attribute__((visibility("hidden")))
 716 void lttng_probes_prune_event_list(struct lttng_ust_tracepoint_list *list);
 717
 718 __attribute__((visibility("hidden")))
 719 int lttng_probes_get_field_list(struct lttng_ust_field_list *list);
 720
 721 __attribute__((visibility("hidden")))
 722 void lttng_probes_prune_field_list(struct lttng_ust_field_list *list);
 723
 724 __attribute__((visibility("hidden")))
 725 struct lttng_ust_abi_tracepoint_iter *
 726         lttng_ust_tracepoint_list_get_iter_next(struct lttng_ust_tracepoint_list *list);
 727
 728 __attribute__((visibility("hidden")))
 729 struct lttng_ust_abi_field_iter *
 730         lttng_ust_field_list_get_iter_next(struct lttng_ust_field_list *list);
 731
 732 __attribute__((visibility("hidden")))
 733 struct lttng_ust_session *lttng_session_create(void);
 734
 735 __attribute__((visibility("hidden")))
 736 int lttng_session_enable(struct lttng_ust_session *session);
 737
 738 __attribute__((visibility("hidden")))
 739 int lttng_session_disable(struct lttng_ust_session *session);
 740
 741 __attribute__((visibility("hidden")))
 742 int lttng_session_statedump(struct lttng_ust_session *session);
 743
 744 __attribute__((visibility("hidden")))
 745 void lttng_session_destroy(struct lttng_ust_session *session);
 746
 747 /*
 748  * Called with ust lock held.
 749  */
 750 __attribute__((visibility("hidden")))
 751 int lttng_session_active(void);
 752
 753 __attribute__((visibility("hidden")))
 754 struct cds_list_head *lttng_get_sessions(void);
 755
 756 __attribute__((visibility("hidden")))
 757 void lttng_handle_pending_statedump(void *owner);
 758
 759 __attribute__((visibility("hidden")))
 760 struct lttng_channel *lttng_channel_create(struct lttng_ust_session *session,
 761                                        const char *transport_name,
 762                                        void *buf_addr,
 763                                        size_t subbuf_size, size_t num_subbuf,
 764                                        unsigned int switch_timer_interval,
 765                                        unsigned int read_timer_interval,
 766                                        int **shm_fd, int **wait_fd,
 767                                        uint64_t **memory_map_size,
 768                                        struct lttng_channel *chan_priv_init);
 769
 770 __attribute__((visibility("hidden")))
 771 int lttng_channel_enable(struct lttng_channel *channel);
 772
 773 __attribute__((visibility("hidden")))
 774 int lttng_channel_disable(struct lttng_channel *channel);
 775
 776 __attribute__((visibility("hidden")))
 777 void lttng_transport_register(struct lttng_transport *transport);
 778
 779 __attribute__((visibility("hidden")))
 780 void lttng_transport_unregister(struct lttng_transport *transport);
 781
 782 /* This is ABI between liblttng-ust and liblttng-ust-ctl */
 783 struct lttng_transport *lttng_ust_transport_find(const char *name);
 784
 785 /* This is ABI between liblttng-ust and liblttng-ust-dl */
 786 void lttng_ust_dl_update(void *ip);
 787
 788 __attribute__((visibility("hidden")))
 789 void lttng_probe_provider_unregister_events(struct lttng_ust_probe_desc *desc);
 790
 791 __attribute__((visibility("hidden")))
 792 int lttng_fix_pending_events(void);
 793
 794 __attribute__((visibility("hidden")))
 795 struct cds_list_head *lttng_get_probe_list_head(void);
 796
 797 __attribute__((visibility("hidden")))
 798 struct lttng_enum *lttng_ust_enum_get_from_desc(struct lttng_ust_session *session,
 799                 struct lttng_ust_enum_desc *enum_desc);
 800
 801 __attribute__((visibility("hidden")))
 802 int lttng_abi_create_root_handle(void);
 803
 804 __attribute__((visibility("hidden")))
 805 const struct lttng_ust_abi_objd_ops *lttng_ust_abi_objd_ops(int id);
 806
 807 __attribute__((visibility("hidden")))
 808 int lttng_ust_abi_objd_unref(int id, int is_owner);
 809
 810 __attribute__((visibility("hidden")))
 811 void lttng_ust_abi_exit(void);
 812
 813 __attribute__((visibility("hidden")))
 814 void lttng_ust_abi_events_exit(void);
 815
 816 __attribute__((visibility("hidden")))
 817 void lttng_ust_abi_objd_table_owner_cleanup(void *owner);
 818
 819 #endif /* _LTTNG_UST_EVENTS_INTERNAL_H */