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                 free(enum_type);
 470                 break;
 471         }
 472         case lttng_ust_type_array:
 473         {
 474                 struct lttng_ust_type_array *array_type = (struct lttng_ust_type_array *) type;
 475
 476                 lttng_ust_destroy_type(array_type->elem_type);
 477                 free(array_type);
 478                 break;
 479         }
 480         case lttng_ust_type_sequence:
 481         {
 482                 struct lttng_ust_type_sequence *sequence_type = (struct lttng_ust_type_sequence *) type;
 483
 484                 lttng_ust_destroy_type(sequence_type->elem_type);
 485                 free(sequence_type);
 486                 break;
 487         }
 488         case lttng_ust_type_struct:
 489         {
 490                 struct lttng_ust_type_struct *struct_type = (struct lttng_ust_type_struct *) type;
 491                 unsigned int i;
 492
 493                 for (i = 0; i < struct_type->nr_fields; i++)
 494                         lttng_ust_destroy_type(struct_type->fields[i]->type);
 495                 free(struct_type);
 496                 break;
 497         }
 498         default:
 499                 abort();
 500         }
 501 }
 502
 503 static inline
 504 struct lttng_enabler *lttng_event_enabler_as_enabler(
 505                 struct lttng_event_enabler *event_enabler)
 506 {
 507         return &event_enabler->base;
 508 }
 509
 510 static inline
 511 struct lttng_enabler *lttng_event_notifier_enabler_as_enabler(
 512                 struct lttng_event_notifier_enabler *event_notifier_enabler)
 513 {
 514         return &event_notifier_enabler->base;
 515 }
 516
 517 /*
 518  * Allocate and initialize a `struct lttng_event_enabler` object.
 519  *
 520  * On success, returns a `struct lttng_event_enabler`,
 521  * On memory error, returns NULL.
 522  */
 523 __attribute__((visibility("hidden")))
 524 struct lttng_event_enabler *lttng_event_enabler_create(
 525                 enum lttng_enabler_format_type format_type,
 526                 struct lttng_ust_abi_event *event_param,
 527                 struct lttng_channel *chan);
 528
 529 /*
 530  * Destroy a `struct lttng_event_enabler` object.
 531  */
 532 __attribute__((visibility("hidden")))
 533 void lttng_event_enabler_destroy(struct lttng_event_enabler *enabler);
 534
 535 /*
 536  * Enable a `struct lttng_event_enabler` object and all events related to this
 537  * enabler.
 538  */
 539 __attribute__((visibility("hidden")))
 540 int lttng_event_enabler_enable(struct lttng_event_enabler *enabler);
 541
 542 /*
 543  * Disable a `struct lttng_event_enabler` object and all events related to this
 544  * enabler.
 545  */
 546 __attribute__((visibility("hidden")))
 547 int lttng_event_enabler_disable(struct lttng_event_enabler *enabler);
 548
 549 /*
 550  * Attach filter bytecode program to `struct lttng_event_enabler` and all
 551  * events related to this enabler.
 552  */
 553 __attribute__((visibility("hidden")))
 554 int lttng_event_enabler_attach_filter_bytecode(
 555                 struct lttng_event_enabler *enabler,
 556                 struct lttng_ust_bytecode_node **bytecode);
 557
 558 /*
 559  * Attach an application context to an event enabler.
 560  *
 561  * Not implemented.
 562  */
 563 __attribute__((visibility("hidden")))
 564 int lttng_event_enabler_attach_context(struct lttng_event_enabler *enabler,
 565                 struct lttng_ust_abi_context *ctx);
 566
 567 /*
 568  * Attach exclusion list to `struct lttng_event_enabler` and all
 569  * events related to this enabler.
 570  */
 571 __attribute__((visibility("hidden")))
 572 int lttng_event_enabler_attach_exclusion(struct lttng_event_enabler *enabler,
 573                 struct lttng_ust_excluder_node **excluder);
 574
 575 /*
 576  * Synchronize bytecodes for the enabler and the instance (event or
 577  * event_notifier).
 578  *
 579  * This function goes over all bytecode programs of the enabler (event or
 580  * event_notifier enabler) to ensure each is linked to the provided instance.
 581  */
 582 __attribute__((visibility("hidden")))
 583 void lttng_enabler_link_bytecode(struct lttng_ust_event_desc *event_desc,
 584                 struct lttng_ust_ctx **ctx,
 585                 struct cds_list_head *instance_bytecode_runtime_head,
 586                 struct cds_list_head *enabler_bytecode_runtime_head);
 587
 588 /*
 589  * Allocate and initialize a `struct lttng_event_notifier_group` object.
 590  *
 591  * On success, returns a `struct lttng_triggre_group`,
 592  * on memory error, returns NULL.
 593  */
 594 __attribute__((visibility("hidden")))
 595 struct lttng_event_notifier_group *lttng_event_notifier_group_create(void);
 596
 597 /*
 598  * Destroy a `struct lttng_event_notifier_group` object.
 599  */
 600 __attribute__((visibility("hidden")))
 601 void lttng_event_notifier_group_destroy(
 602                 struct lttng_event_notifier_group *event_notifier_group);
 603
 604 /*
 605  * Allocate and initialize a `struct lttng_event_notifier_enabler` object.
 606  *
 607  * On success, returns a `struct lttng_event_notifier_enabler`,
 608  * On memory error, returns NULL.
 609  */
 610 __attribute__((visibility("hidden")))
 611 struct lttng_event_notifier_enabler *lttng_event_notifier_enabler_create(
 612                 struct lttng_event_notifier_group *event_notifier_group,
 613                 enum lttng_enabler_format_type format_type,
 614                 struct lttng_ust_abi_event_notifier *event_notifier_param);
 615
 616 /*
 617  * Destroy a `struct lttng_event_notifier_enabler` object.
 618  */
 619 __attribute__((visibility("hidden")))
 620 void lttng_event_notifier_enabler_destroy(
 621                 struct lttng_event_notifier_enabler *event_notifier_enabler);
 622
 623 /*
 624  * Enable a `struct lttng_event_notifier_enabler` object and all event
 625  * notifiers related to this enabler.
 626  */
 627 __attribute__((visibility("hidden")))
 628 int lttng_event_notifier_enabler_enable(
 629                 struct lttng_event_notifier_enabler *event_notifier_enabler);
 630
 631 /*
 632  * Disable a `struct lttng_event_notifier_enabler` object and all event
 633  * notifiers related to this enabler.
 634  */
 635 __attribute__((visibility("hidden")))
 636 int lttng_event_notifier_enabler_disable(
 637                 struct lttng_event_notifier_enabler *event_notifier_enabler);
 638
 639 /*
 640  * Attach filter bytecode program to `struct lttng_event_notifier_enabler` and
 641  * all event notifiers related to this enabler.
 642  */
 643 __attribute__((visibility("hidden")))
 644 int lttng_event_notifier_enabler_attach_filter_bytecode(
 645                 struct lttng_event_notifier_enabler *event_notifier_enabler,
 646                 struct lttng_ust_bytecode_node **bytecode);
 647
 648 /*
 649  * Attach capture bytecode program to `struct lttng_event_notifier_enabler` and
 650  * all event_notifiers related to this enabler.
 651  */
 652 __attribute__((visibility("hidden")))
 653 int lttng_event_notifier_enabler_attach_capture_bytecode(
 654                 struct lttng_event_notifier_enabler *event_notifier_enabler,
 655                 struct lttng_ust_bytecode_node **bytecode);
 656
 657 /*
 658  * Attach exclusion list to `struct lttng_event_notifier_enabler` and all
 659  * event notifiers related to this enabler.
 660  */
 661 __attribute__((visibility("hidden")))
 662 int lttng_event_notifier_enabler_attach_exclusion(
 663                 struct lttng_event_notifier_enabler *event_notifier_enabler,
 664                 struct lttng_ust_excluder_node **excluder);
 665
 666 __attribute__((visibility("hidden")))
 667 void lttng_free_event_filter_runtime(struct lttng_ust_event_common *event);
 668
 669 /*
 670  * Connect the probe on all enablers matching this event description.
 671  * Called on library load.
 672  */
 673 __attribute__((visibility("hidden")))
 674 int lttng_fix_pending_event_notifiers(void);
 675
 676 __attribute__((visibility("hidden")))
 677 struct lttng_counter *lttng_ust_counter_create(
 678                 const char *counter_transport_name,
 679                 size_t number_dimensions, const struct lttng_counter_dimension *dimensions);
 680
 681 #ifdef HAVE_PERF_EVENT
 682
 683 __attribute__((visibility("hidden")))
 684 int lttng_add_perf_counter_to_ctx(uint32_t type,
 685                                   uint64_t config,
 686                                   const char *name,
 687                                   struct lttng_ust_ctx **ctx);
 688
 689 __attribute__((visibility("hidden")))
 690 int lttng_perf_counter_init(void);
 691
 692 __attribute__((visibility("hidden")))
 693 void lttng_perf_counter_exit(void);
 694
 695 #else /* #ifdef HAVE_PERF_EVENT */
 696
 697 static inline
 698 int lttng_add_perf_counter_to_ctx(uint32_t type,
 699                                   uint64_t config,
 700                                   const char *name,
 701                                   struct lttng_ust_ctx **ctx)
 702 {
 703         return -ENOSYS;
 704 }
 705 static inline
 706 int lttng_perf_counter_init(void)
 707 {
 708         return 0;
 709 }
 710 static inline
 711 void lttng_perf_counter_exit(void)
 712 {
 713 }
 714 #endif /* #else #ifdef HAVE_PERF_EVENT */
 715
 716 __attribute__((visibility("hidden")))
 717 int lttng_probes_get_event_list(struct lttng_ust_tracepoint_list *list);
 718
 719 __attribute__((visibility("hidden")))
 720 void lttng_probes_prune_event_list(struct lttng_ust_tracepoint_list *list);
 721
 722 __attribute__((visibility("hidden")))
 723 int lttng_probes_get_field_list(struct lttng_ust_field_list *list);
 724
 725 __attribute__((visibility("hidden")))
 726 void lttng_probes_prune_field_list(struct lttng_ust_field_list *list);
 727
 728 __attribute__((visibility("hidden")))
 729 struct lttng_ust_abi_tracepoint_iter *
 730         lttng_ust_tracepoint_list_get_iter_next(struct lttng_ust_tracepoint_list *list);
 731
 732 __attribute__((visibility("hidden")))
 733 struct lttng_ust_abi_field_iter *
 734         lttng_ust_field_list_get_iter_next(struct lttng_ust_field_list *list);
 735
 736 __attribute__((visibility("hidden")))
 737 struct lttng_ust_session *lttng_session_create(void);
 738
 739 __attribute__((visibility("hidden")))
 740 int lttng_session_enable(struct lttng_ust_session *session);
 741
 742 __attribute__((visibility("hidden")))
 743 int lttng_session_disable(struct lttng_ust_session *session);
 744
 745 __attribute__((visibility("hidden")))
 746 int lttng_session_statedump(struct lttng_ust_session *session);
 747
 748 __attribute__((visibility("hidden")))
 749 void lttng_session_destroy(struct lttng_ust_session *session);
 750
 751 /*
 752  * Called with ust lock held.
 753  */
 754 __attribute__((visibility("hidden")))
 755 int lttng_session_active(void);
 756
 757 __attribute__((visibility("hidden")))
 758 struct cds_list_head *lttng_get_sessions(void);
 759
 760 __attribute__((visibility("hidden")))
 761 void lttng_handle_pending_statedump(void *owner);
 762
 763 __attribute__((visibility("hidden")))
 764 struct lttng_channel *lttng_channel_create(struct lttng_ust_session *session,
 765                                        const char *transport_name,
 766                                        void *buf_addr,
 767                                        size_t subbuf_size, size_t num_subbuf,
 768                                        unsigned int switch_timer_interval,
 769                                        unsigned int read_timer_interval,
 770                                        int **shm_fd, int **wait_fd,
 771                                        uint64_t **memory_map_size,
 772                                        struct lttng_channel *chan_priv_init);
 773
 774 __attribute__((visibility("hidden")))
 775 int lttng_channel_enable(struct lttng_channel *channel);
 776
 777 __attribute__((visibility("hidden")))
 778 int lttng_channel_disable(struct lttng_channel *channel);
 779
 780 __attribute__((visibility("hidden")))
 781 void lttng_transport_register(struct lttng_transport *transport);
 782
 783 __attribute__((visibility("hidden")))
 784 void lttng_transport_unregister(struct lttng_transport *transport);
 785
 786 /* This is ABI between liblttng-ust and liblttng-ust-ctl */
 787 struct lttng_transport *lttng_ust_transport_find(const char *name);
 788
 789 /* This is ABI between liblttng-ust and liblttng-ust-dl */
 790 void lttng_ust_dl_update(void *ip);
 791
 792 __attribute__((visibility("hidden")))
 793 void lttng_probe_provider_unregister_events(struct lttng_ust_probe_desc *desc);
 794
 795 __attribute__((visibility("hidden")))
 796 int lttng_fix_pending_events(void);
 797
 798 __attribute__((visibility("hidden")))
 799 struct cds_list_head *lttng_get_probe_list_head(void);
 800
 801 __attribute__((visibility("hidden")))
 802 struct lttng_enum *lttng_ust_enum_get_from_desc(struct lttng_ust_session *session,
 803                 struct lttng_ust_enum_desc *enum_desc);
 804
 805 __attribute__((visibility("hidden")))
 806 int lttng_abi_create_root_handle(void);
 807
 808 __attribute__((visibility("hidden")))
 809 const struct lttng_ust_abi_objd_ops *lttng_ust_abi_objd_ops(int id);
 810
 811 __attribute__((visibility("hidden")))
 812 int lttng_ust_abi_objd_unref(int id, int is_owner);
 813
 814 __attribute__((visibility("hidden")))
 815 void lttng_ust_abi_exit(void);
 816
 817 __attribute__((visibility("hidden")))
 818 void lttng_ust_abi_events_exit(void);
 819
 820 __attribute__((visibility("hidden")))
 821 void lttng_ust_abi_objd_table_owner_cleanup(void *owner);
 822
 823 #endif /* _LTTNG_UST_EVENTS_INTERNAL_H */