1 #ifndef _LTTNG_UST_EVENTS_H
2 #define _LTTNG_UST_EVENTS_H
7 * Copyright 2010-2012 (c) - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
9 * Holds LTTng per-session event registry.
11 * Permission is hereby granted, free of charge, to any person obtaining a copy
12 * of this software and associated documentation files (the "Software"), to deal
13 * in the Software without restriction, including without limitation the rights
14 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
15 * copies of the Software, and to permit persons to whom the Software is
16 * furnished to do so, subject to the following conditions:
18 * The above copyright notice and this permission notice shall be included in
19 * all copies or substantial portions of the Software.
21 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
22 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
23 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
24 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
25 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
26 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 #include <urcu/list.h>
31 #include <urcu/hlist.h>
34 #include <lttng/ust-config.h>
35 #include <lttng/ust-abi.h>
36 #include <lttng/ust-tracer.h>
37 #include <lttng/ust-endian.h>
44 #error "LTTNG_PACKED should be defined"
51 #define LTTNG_UST_UUID_LEN 16
54 * Tracepoint provider version. Compatibility based on the major number.
55 * Older tracepoint providers can always register to newer lttng-ust
56 * library, but the opposite is rejected: a newer tracepoint provider is
57 * rejected by an older lttng-ust library.
59 #define LTTNG_UST_PROVIDER_MAJOR 2
60 #define LTTNG_UST_PROVIDER_MINOR 0
64 struct lttng_ust_lib_ring_buffer_ctx
;
65 struct lttng_ust_context_app
;
66 struct lttng_event_field
;
67 struct lttng_event_notifier
;
68 struct lttng_event_notifier_group
;
71 * Data structures used by tracepoint event declarations, and by the
72 * tracer. Those structures have padding for future extension.
76 * LTTng client type enumeration. Used by the consumer to map the
77 * callbacks from its own address space.
79 enum lttng_client_types
{
80 LTTNG_CLIENT_METADATA
= 0,
81 LTTNG_CLIENT_DISCARD
= 1,
82 LTTNG_CLIENT_OVERWRITE
= 2,
83 LTTNG_CLIENT_DISCARD_RT
= 3,
84 LTTNG_CLIENT_OVERWRITE_RT
= 4,
85 LTTNG_NR_CLIENT_TYPES
,
88 /* Type description */
90 /* Update the astract_types name table in lttng-types.c along with this enum */
91 enum lttng_abstract_types
{
93 atype_enum
, /* legacy */
94 atype_array
, /* legacy */
95 atype_sequence
, /* legacy */
99 atype_struct
, /* legacy */
101 atype_array_nestable
,
102 atype_sequence_nestable
,
103 atype_struct_nestable
,
107 /* Update the string_encodings name table in lttng-types.c along with this enum */
108 enum lttng_string_encodings
{
109 lttng_encode_none
= 0,
110 lttng_encode_UTF8
= 1,
111 lttng_encode_ASCII
= 2,
115 struct lttng_enum_value
{
116 unsigned long long value
;
117 unsigned int signedness
:1;
120 enum lttng_enum_entry_options
{
121 LTTNG_ENUM_ENTRY_OPTION_IS_AUTO
= 1U << 0,
124 #define LTTNG_UST_ENUM_ENTRY_PADDING 16
125 struct lttng_enum_entry
{
126 struct lttng_enum_value start
, end
; /* start and end are inclusive */
130 unsigned int options
;
131 } LTTNG_PACKED extra
;
132 char padding
[LTTNG_UST_ENUM_ENTRY_PADDING
];
136 #define __type_integer(_type, _byte_order, _base, _encoding) \
138 .atype = atype_integer, \
143 .size = sizeof(_type) * CHAR_BIT, \
144 .alignment = lttng_alignof(_type) * CHAR_BIT, \
145 .signedness = lttng_is_signed_type(_type), \
146 .reverse_byte_order = _byte_order != BYTE_ORDER, \
148 .encoding = lttng_encode_##_encoding, \
153 #define LTTNG_UST_INTEGER_TYPE_PADDING 24
154 struct lttng_integer_type
{
155 unsigned int size
; /* in bits */
156 unsigned short alignment
; /* in bits */
157 unsigned int signedness
:1;
158 unsigned int reverse_byte_order
:1;
159 unsigned int base
; /* 2, 8, 10, 16, for pretty print */
160 enum lttng_string_encodings encoding
;
161 char padding
[LTTNG_UST_INTEGER_TYPE_PADDING
];
165 * Only float and double are supported. long double is not supported at
168 #define _float_mant_dig(_type) \
169 (sizeof(_type) == sizeof(float) ? FLT_MANT_DIG \
170 : (sizeof(_type) == sizeof(double) ? DBL_MANT_DIG \
173 #define __type_float(_type) \
175 .atype = atype_float, \
180 .exp_dig = sizeof(_type) * CHAR_BIT \
181 - _float_mant_dig(_type), \
182 .mant_dig = _float_mant_dig(_type), \
183 .alignment = lttng_alignof(_type) * CHAR_BIT, \
184 .reverse_byte_order = BYTE_ORDER != FLOAT_WORD_ORDER, \
189 #define LTTNG_UST_FLOAT_TYPE_PADDING 24
190 struct lttng_float_type
{
191 unsigned int exp_dig
; /* exponent digits, in bits */
192 unsigned int mant_dig
; /* mantissa digits, in bits */
193 unsigned short alignment
; /* in bits */
194 unsigned int reverse_byte_order
:1;
195 char padding
[LTTNG_UST_FLOAT_TYPE_PADDING
];
199 #define LTTNG_UST_BASIC_TYPE_PADDING 128
200 union _lttng_basic_type
{
201 struct lttng_integer_type integer
; /* legacy */
203 const struct lttng_enum_desc
*desc
; /* Enumeration mapping */
204 struct lttng_integer_type container_type
;
205 } enumeration
; /* legacy */
207 enum lttng_string_encodings encoding
;
208 } string
; /* legacy */
209 struct lttng_float_type _float
; /* legacy */
210 char padding
[LTTNG_UST_BASIC_TYPE_PADDING
];
214 struct lttng_basic_type
{
215 enum lttng_abstract_types atype
;
217 union _lttng_basic_type basic
;
221 #define LTTNG_UST_TYPE_PADDING 128
223 enum lttng_abstract_types atype
;
225 /* provider ABI 2.0 */
226 struct lttng_integer_type integer
;
227 struct lttng_float_type _float
;
229 enum lttng_string_encodings encoding
;
232 const struct lttng_enum_desc
*desc
; /* Enumeration mapping */
233 struct lttng_type
*container_type
;
236 const struct lttng_type
*elem_type
;
237 unsigned int length
; /* Num. elems. */
238 unsigned int alignment
;
241 const char *length_name
; /* Length field name. */
242 const struct lttng_type
*elem_type
;
243 unsigned int alignment
; /* Alignment before elements. */
246 unsigned int nr_fields
;
247 const struct lttng_event_field
*fields
; /* Array of fields. */
248 unsigned int alignment
;
252 /* legacy provider ABI 1.0 */
253 union _lttng_basic_type basic
; /* legacy */
255 struct lttng_basic_type elem_type
;
256 unsigned int length
; /* Num. elems. */
257 } array
; /* legacy */
259 struct lttng_basic_type length_type
;
260 struct lttng_basic_type elem_type
;
261 } sequence
; /* legacy */
263 unsigned int nr_fields
;
264 struct lttng_event_field
*fields
; /* Array of fields. */
265 } _struct
; /* legacy */
267 char padding
[LTTNG_UST_TYPE_PADDING
];
271 #define LTTNG_UST_ENUM_TYPE_PADDING 24
272 struct lttng_enum_desc
{
274 const struct lttng_enum_entry
*entries
;
275 unsigned int nr_entries
;
276 char padding
[LTTNG_UST_ENUM_TYPE_PADDING
];
280 * Event field description
282 * IMPORTANT: this structure is part of the ABI between the probe and
283 * UST. Fields need to be only added at the end, never reordered, never
287 #define LTTNG_UST_EVENT_FIELD_PADDING 28
288 struct lttng_event_field
{
290 struct lttng_type type
;
291 unsigned int nowrite
; /* do not write into trace */
294 unsigned int nofilter
:1; /* do not consider for filter */
296 char padding
[LTTNG_UST_EVENT_FIELD_PADDING
];
300 enum lttng_ust_dynamic_type
{
301 LTTNG_UST_DYNAMIC_TYPE_NONE
,
302 LTTNG_UST_DYNAMIC_TYPE_S8
,
303 LTTNG_UST_DYNAMIC_TYPE_S16
,
304 LTTNG_UST_DYNAMIC_TYPE_S32
,
305 LTTNG_UST_DYNAMIC_TYPE_S64
,
306 LTTNG_UST_DYNAMIC_TYPE_U8
,
307 LTTNG_UST_DYNAMIC_TYPE_U16
,
308 LTTNG_UST_DYNAMIC_TYPE_U32
,
309 LTTNG_UST_DYNAMIC_TYPE_U64
,
310 LTTNG_UST_DYNAMIC_TYPE_FLOAT
,
311 LTTNG_UST_DYNAMIC_TYPE_DOUBLE
,
312 LTTNG_UST_DYNAMIC_TYPE_STRING
,
313 _NR_LTTNG_UST_DYNAMIC_TYPES
,
316 struct lttng_ctx_value
{
317 enum lttng_ust_dynamic_type sel
;
326 struct lttng_perf_counter_field
;
328 #define LTTNG_UST_CTX_FIELD_PADDING 40
329 struct lttng_ctx_field
{
330 struct lttng_event_field event_field
;
331 size_t (*get_size
)(struct lttng_ctx_field
*field
, size_t offset
);
332 void (*record
)(struct lttng_ctx_field
*field
,
333 struct lttng_ust_lib_ring_buffer_ctx
*ctx
,
334 struct lttng_channel
*chan
);
335 void (*get_value
)(struct lttng_ctx_field
*field
,
336 struct lttng_ctx_value
*value
);
338 struct lttng_perf_counter_field
*perf_counter
;
339 char padding
[LTTNG_UST_CTX_FIELD_PADDING
];
341 void (*destroy
)(struct lttng_ctx_field
*field
);
342 char *field_name
; /* Has ownership, dynamically allocated. */
345 #define LTTNG_UST_CTX_PADDING 20
347 struct lttng_ctx_field
*fields
;
348 unsigned int nr_fields
;
349 unsigned int allocated_fields
;
350 unsigned int largest_align
;
351 char padding
[LTTNG_UST_CTX_PADDING
];
354 #define LTTNG_UST_EVENT_DESC_PADDING 40
355 struct lttng_event_desc
{
357 void (*probe_callback
)(void);
358 const struct lttng_event_ctx
*ctx
; /* context */
359 const struct lttng_event_field
*fields
; /* event payload */
360 unsigned int nr_fields
;
361 const int **loglevel
;
362 const char *signature
; /* Argument types/names received */
365 const char **model_emf_uri
;
366 void (*event_notifier_callback
)(void);
368 char padding
[LTTNG_UST_EVENT_DESC_PADDING
];
372 #define LTTNG_UST_PROBE_DESC_PADDING 12
373 struct lttng_probe_desc
{
374 const char *provider
;
375 const struct lttng_event_desc
**event_desc
;
376 unsigned int nr_events
;
377 struct cds_list_head head
; /* chain registered probes */
378 struct cds_list_head lazy_init_head
;
379 int lazy
; /* lazy registration */
382 char padding
[LTTNG_UST_PROBE_DESC_PADDING
];
385 /* Data structures used by the tracer. */
387 enum lttng_enabler_format_type
{
388 LTTNG_ENABLER_FORMAT_STAR_GLOB
,
389 LTTNG_ENABLER_FORMAT_EVENT
,
393 * Enabler field, within whatever object is enabling an event. Target of
394 * backward reference.
396 struct lttng_enabler
{
397 enum lttng_enabler_format_type format_type
;
399 /* head list of struct lttng_ust_filter_bytecode_node */
400 struct cds_list_head filter_bytecode_head
;
401 /* head list of struct lttng_ust_excluder_node */
402 struct cds_list_head excluder_head
;
404 struct lttng_ust_event event_param
;
405 unsigned int enabled
:1;
408 struct tp_list_entry
{
409 struct lttng_ust_tracepoint_iter tp
;
410 struct cds_list_head head
;
413 struct lttng_ust_tracepoint_list
{
414 struct tp_list_entry
*iter
;
415 struct cds_list_head head
;
418 struct tp_field_list_entry
{
419 struct lttng_ust_field_iter field
;
420 struct cds_list_head head
;
423 struct lttng_ust_field_list
{
424 struct tp_field_list_entry
*iter
;
425 struct cds_list_head head
;
428 struct ust_pending_probe
;
432 * Bytecode interpreter return value masks.
434 enum lttng_bytecode_interpreter_ret
{
435 LTTNG_INTERPRETER_DISCARD
= 0,
436 LTTNG_INTERPRETER_RECORD_FLAG
= (1ULL << 0),
437 /* Other bits are kept for future use. */
440 struct lttng_interpreter_output
;
443 * This structure is used in the probes. More specifically, the `filter` and
444 * `node` fields are explicity used in the probes. When modifying this
445 * structure we must not change the layout of these two fields as it is
448 struct lttng_bytecode_runtime
{
449 /* Associated bytecode */
450 struct lttng_ust_bytecode_node
*bc
;
452 uint64_t (*filter
)(void *interpreter_data
,
453 const char *interpreter_stack_data
);
454 uint64_t (*capture
)(void *interpreter_data
,
455 const char *interpreter_stack_data
,
456 struct lttng_interpreter_output
*interpreter_output
);
459 struct cds_list_head node
; /* list of bytecode runtime in event */
461 * Pointer to a URCU-protected pointer owned by an `struct
462 * lttng_session`or `struct lttng_event_notifier_group`.
464 struct lttng_ctx
**pctx
;
468 * Objects in a linked-list of enablers, owned by an event or event_notifier.
469 * This is used because an event (or a event_notifier) can be enabled by more
470 * than one enabler and we want a quick way to iterate over all enablers of an
473 * For example, event rules "my_app:a*" and "my_app:ab*" will both match the
474 * event with the name "my_app:abc".
476 struct lttng_enabler_ref
{
477 struct cds_list_head node
; /* enabler ref list */
478 struct lttng_enabler
*ref
; /* backward ref */
482 * lttng_event structure is referred to by the tracing fast path. It
483 * must be kept small.
485 * IMPORTANT: this structure is part of the ABI between the probe and
486 * UST. Fields need to be only added at the end, never reordered, never
491 struct lttng_channel
*chan
;
493 const struct lttng_event_desc
*desc
;
494 struct lttng_ctx
*ctx
;
495 enum lttng_ust_instrumentation instrumentation
;
496 struct cds_list_head node
; /* Event list in session */
498 /* list of struct lttng_bytecode_runtime, sorted by seqnum */
499 struct cds_list_head filter_bytecode_runtime_head
;
500 int has_enablers_without_bytecode
;
501 /* Backward references: list of lttng_enabler_ref (ref to enablers) */
502 struct cds_list_head enablers_ref_head
;
503 struct cds_hlist_node hlist
; /* session ht of events */
504 int registered
; /* has reg'd tracepoint probe */
507 struct lttng_event_notifier
{
509 uint64_t error_counter_index
;
511 int registered
; /* has reg'd tracepoint probe */
512 size_t num_captures
; /* Needed to allocate the msgpack array. */
513 void (*notification_send
)(struct lttng_event_notifier
*event_notifier
,
514 const char *stack_data
);
515 struct cds_list_head filter_bytecode_runtime_head
;
516 struct cds_list_head capture_bytecode_runtime_head
;
517 int has_enablers_without_bytecode
;
518 struct cds_list_head enablers_ref_head
;
519 const struct lttng_event_desc
*desc
;
520 struct cds_hlist_node hlist
; /* hashtable of event_notifiers */
521 struct cds_list_head node
; /* event_notifier list in session */
522 struct lttng_event_notifier_group
*group
; /* weak ref */
526 const struct lttng_enum_desc
*desc
;
527 struct lttng_session
*session
;
528 struct cds_list_head node
; /* Enum list in session */
529 struct cds_hlist_node hlist
; /* Session ht of enums */
530 uint64_t id
; /* Enumeration ID in sessiond */
534 struct lttng_ust_shm_handle
;
537 * IMPORTANT: this structure is part of the ABI between the probe and
538 * UST. Fields need to be only added at the end, never reordered, never
541 struct lttng_channel_ops
{
542 struct lttng_channel
*(*channel_create
)(const char *name
,
544 size_t subbuf_size
, size_t num_subbuf
,
545 unsigned int switch_timer_interval
,
546 unsigned int read_timer_interval
,
549 const int *stream_fds
, int nr_stream_fds
,
550 int64_t blocking_timeout
);
551 void (*channel_destroy
)(struct lttng_channel
*chan
);
552 int (*event_reserve
)(struct lttng_ust_lib_ring_buffer_ctx
*ctx
,
554 void (*event_commit
)(struct lttng_ust_lib_ring_buffer_ctx
*ctx
);
555 void (*event_write
)(struct lttng_ust_lib_ring_buffer_ctx
*ctx
,
556 const void *src
, size_t len
);
558 * packet_avail_size returns the available size in the current
559 * packet. Note that the size returned is only a hint, since it
560 * may change due to concurrent writes.
562 size_t (*packet_avail_size
)(struct channel
*chan
,
563 struct lttng_ust_shm_handle
*handle
);
564 int (*is_finalized
)(struct channel
*chan
);
565 int (*is_disabled
)(struct channel
*chan
);
566 int (*flush_buffer
)(struct channel
*chan
, struct lttng_ust_shm_handle
*handle
);
567 void (*event_strcpy
)(struct lttng_ust_lib_ring_buffer_ctx
*ctx
,
568 const char *src
, size_t len
);
572 * IMPORTANT: this structure is part of the ABI between the probe and
573 * UST. Fields need to be only added at the end, never reordered, never
576 struct lttng_channel
{
578 * The pointers located in this private data are NOT safe to be
579 * dereferenced by the consumer. The only operations the
580 * consumer process is designed to be allowed to do is to read
581 * and perform subbuffer flush.
583 struct channel
*chan
; /* Channel buffers */
585 struct lttng_ctx
*ctx
;
586 /* Event ID management */
587 struct lttng_session
*session
;
588 int objd
; /* Object associated to channel */
589 struct cds_list_head node
; /* Channel list in session */
590 const struct lttng_channel_ops
*ops
;
591 int header_type
; /* 0: unset, 1: compact, 2: large */
592 struct lttng_ust_shm_handle
*handle
; /* shared-memory handle */
596 enum lttng_ust_chan_type type
;
597 unsigned char uuid
[LTTNG_UST_UUID_LEN
]; /* Trace session unique ID */
598 int tstate
:1; /* Transient enable state */
601 #define LTTNG_COUNTER_DIMENSION_MAX 8
603 struct lttng_counter_dimension
{
605 uint64_t underflow_index
;
606 uint64_t overflow_index
;
607 uint8_t has_underflow
;
608 uint8_t has_overflow
;
611 struct lttng_counter_ops
{
612 struct lib_counter
*(*counter_create
)(size_t nr_dimensions
,
613 const struct lttng_counter_dimension
*dimensions
,
614 int64_t global_sum_step
,
615 int global_counter_fd
,
616 int nr_counter_cpu_fds
,
617 const int *counter_cpu_fds
,
619 void (*counter_destroy
)(struct lib_counter
*counter
);
620 int (*counter_add
)(struct lib_counter
*counter
,
621 const size_t *dimension_indexes
, int64_t v
);
622 int (*counter_read
)(struct lib_counter
*counter
,
623 const size_t *dimension_indexes
, int cpu
,
624 int64_t *value
, bool *overflow
, bool *underflow
);
625 int (*counter_aggregate
)(struct lib_counter
*counter
,
626 const size_t *dimension_indexes
, int64_t *value
,
627 bool *overflow
, bool *underflow
);
628 int (*counter_clear
)(struct lib_counter
*counter
, const size_t *dimension_indexes
);
631 #define LTTNG_UST_STACK_CTX_PADDING 32
632 struct lttng_stack_ctx
{
633 struct lttng_event
*event
;
634 struct lttng_ctx
*chan_ctx
; /* RCU dereferenced. */
635 struct lttng_ctx
*event_ctx
; /* RCU dereferenced. */
636 char padding
[LTTNG_UST_STACK_CTX_PADDING
];
639 #define LTTNG_UST_EVENT_HT_BITS 12
640 #define LTTNG_UST_EVENT_HT_SIZE (1U << LTTNG_UST_EVENT_HT_BITS)
642 struct lttng_ust_event_ht
{
643 struct cds_hlist_head table
[LTTNG_UST_EVENT_HT_SIZE
];
646 #define LTTNG_UST_EVENT_NOTIFIER_HT_BITS 12
647 #define LTTNG_UST_EVENT_NOTIFIER_HT_SIZE (1U << LTTNG_UST_EVENT_NOTIFIER_HT_BITS)
648 struct lttng_ust_event_notifier_ht
{
649 struct cds_hlist_head table
[LTTNG_UST_EVENT_NOTIFIER_HT_SIZE
];
652 #define LTTNG_UST_ENUM_HT_BITS 12
653 #define LTTNG_UST_ENUM_HT_SIZE (1U << LTTNG_UST_ENUM_HT_BITS)
655 struct lttng_ust_enum_ht
{
656 struct cds_hlist_head table
[LTTNG_UST_ENUM_HT_SIZE
];
660 * IMPORTANT: this structure is part of the ABI between the probe and
661 * UST. Fields need to be only added at the end, never reordered, never
664 struct lttng_session
{
665 int active
; /* Is trace session active ? */
666 int been_active
; /* Been active ? */
667 int objd
; /* Object associated */
668 struct cds_list_head chan_head
; /* Channel list head */
669 struct cds_list_head events_head
; /* list of events */
670 struct cds_list_head node
; /* Session list */
673 /* List of enablers */
674 struct cds_list_head enablers_head
;
675 struct lttng_ust_event_ht events_ht
; /* ht of events */
676 void *owner
; /* object owner */
677 int tstate
:1; /* Transient enable state */
680 int statedump_pending
:1;
683 struct lttng_ust_enum_ht enums_ht
; /* ht of enumerations */
684 struct cds_list_head enums_head
;
685 struct lttng_ctx
*ctx
; /* contexts for filters. */
688 struct lttng_counter
{
690 struct lttng_event_notifier_group
*event_notifier_group
; /* owner */
691 struct lttng_counter_transport
*transport
;
692 struct lib_counter
*counter
;
693 struct lttng_counter_ops
*ops
;
696 struct lttng_event_notifier_group
{
700 struct cds_list_head node
; /* Event notifier group handle list */
701 struct cds_list_head enablers_head
;
702 struct cds_list_head event_notifiers_head
; /* list of event_notifiers */
703 struct lttng_ust_event_notifier_ht event_notifiers_ht
; /* hashtable of event_notifiers */
704 struct lttng_ctx
*ctx
; /* contexts for filters. */
706 struct lttng_counter
*error_counter
;
707 size_t error_counter_len
;
710 struct lttng_transport
{
712 struct cds_list_head node
;
713 struct lttng_channel_ops ops
;
714 const struct lttng_ust_lib_ring_buffer_config
*client_config
;
717 struct lttng_counter_transport
{
719 struct cds_list_head node
;
720 struct lttng_counter_ops ops
;
721 const struct lib_counter_config
*client_config
;
724 struct lttng_session
*lttng_session_create(void);
725 int lttng_session_enable(struct lttng_session
*session
);
726 int lttng_session_disable(struct lttng_session
*session
);
727 int lttng_session_statedump(struct lttng_session
*session
);
728 void lttng_session_destroy(struct lttng_session
*session
);
730 struct lttng_channel
*lttng_channel_create(struct lttng_session
*session
,
731 const char *transport_name
,
733 size_t subbuf_size
, size_t num_subbuf
,
734 unsigned int switch_timer_interval
,
735 unsigned int read_timer_interval
,
736 int **shm_fd
, int **wait_fd
,
737 uint64_t **memory_map_size
,
738 struct lttng_channel
*chan_priv_init
);
740 int lttng_channel_enable(struct lttng_channel
*channel
);
741 int lttng_channel_disable(struct lttng_channel
*channel
);
743 int lttng_attach_context(struct lttng_ust_context
*context_param
,
744 union ust_args
*uargs
,
745 struct lttng_ctx
**ctx
, struct lttng_session
*session
);
746 void lttng_transport_register(struct lttng_transport
*transport
);
747 void lttng_transport_unregister(struct lttng_transport
*transport
);
749 struct lttng_counter
*lttng_ust_counter_create(
750 const char *counter_transport_name
,
751 size_t number_dimensions
, const struct lttng_counter_dimension
*dimensions
);
753 int lttng_probe_register(struct lttng_probe_desc
*desc
);
754 void lttng_probe_unregister(struct lttng_probe_desc
*desc
);
755 void lttng_probe_provider_unregister_events(struct lttng_probe_desc
*desc
);
756 int lttng_fix_pending_events(void);
757 int lttng_probes_init(void);
758 void lttng_probes_exit(void);
759 int lttng_find_context(struct lttng_ctx
*ctx
, const char *name
);
760 int lttng_get_context_index(struct lttng_ctx
*ctx
, const char *name
);
761 struct lttng_ctx_field
*lttng_append_context(struct lttng_ctx
**ctx_p
);
762 void lttng_context_update(struct lttng_ctx
*ctx
);
763 void lttng_remove_context_field(struct lttng_ctx
**ctx_p
,
764 struct lttng_ctx_field
*field
);
765 void lttng_destroy_context(struct lttng_ctx
*ctx
);
766 int lttng_add_vtid_to_ctx(struct lttng_ctx
**ctx
);
767 int lttng_add_vpid_to_ctx(struct lttng_ctx
**ctx
);
768 int lttng_add_pthread_id_to_ctx(struct lttng_ctx
**ctx
);
769 int lttng_add_procname_to_ctx(struct lttng_ctx
**ctx
);
770 int lttng_add_ip_to_ctx(struct lttng_ctx
**ctx
);
771 int lttng_add_cpu_id_to_ctx(struct lttng_ctx
**ctx
);
772 int lttng_add_dyntest_to_ctx(struct lttng_ctx
**ctx
);
773 int lttng_add_cgroup_ns_to_ctx(struct lttng_ctx
**ctx
);
774 int lttng_add_ipc_ns_to_ctx(struct lttng_ctx
**ctx
);
775 int lttng_add_mnt_ns_to_ctx(struct lttng_ctx
**ctx
);
776 int lttng_add_net_ns_to_ctx(struct lttng_ctx
**ctx
);
777 int lttng_add_pid_ns_to_ctx(struct lttng_ctx
**ctx
);
778 int lttng_add_user_ns_to_ctx(struct lttng_ctx
**ctx
);
779 int lttng_add_uts_ns_to_ctx(struct lttng_ctx
**ctx
);
780 int lttng_add_vuid_to_ctx(struct lttng_ctx
**ctx
);
781 int lttng_add_veuid_to_ctx(struct lttng_ctx
**ctx
);
782 int lttng_add_vsuid_to_ctx(struct lttng_ctx
**ctx
);
783 int lttng_add_vgid_to_ctx(struct lttng_ctx
**ctx
);
784 int lttng_add_vegid_to_ctx(struct lttng_ctx
**ctx
);
785 int lttng_add_vsgid_to_ctx(struct lttng_ctx
**ctx
);
786 void lttng_context_vtid_reset(void);
787 void lttng_context_vpid_reset(void);
788 void lttng_context_procname_reset(void);
789 void lttng_context_cgroup_ns_reset(void);
790 void lttng_context_ipc_ns_reset(void);
791 void lttng_context_mnt_ns_reset(void);
792 void lttng_context_net_ns_reset(void);
793 void lttng_context_pid_ns_reset(void);
794 void lttng_context_user_ns_reset(void);
795 void lttng_context_uts_ns_reset(void);
796 void lttng_context_vuid_reset(void);
797 void lttng_context_veuid_reset(void);
798 void lttng_context_vsuid_reset(void);
799 void lttng_context_vgid_reset(void);
800 void lttng_context_vegid_reset(void);
801 void lttng_context_vsgid_reset(void);
803 #ifdef LTTNG_UST_HAVE_PERF_EVENT
804 int lttng_add_perf_counter_to_ctx(uint32_t type
,
807 struct lttng_ctx
**ctx
);
808 int lttng_perf_counter_init(void);
809 void lttng_perf_counter_exit(void);
810 #else /* #ifdef LTTNG_UST_HAVE_PERF_EVENT */
812 int lttng_add_perf_counter_to_ctx(uint32_t type
,
815 struct lttng_ctx
**ctx
)
820 int lttng_perf_counter_init(void)
825 void lttng_perf_counter_exit(void)
828 #endif /* #else #ifdef LTTNG_UST_HAVE_PERF_EVENT */
830 extern const struct lttng_ust_client_lib_ring_buffer_client_cb
*lttng_client_callbacks_metadata
;
831 extern const struct lttng_ust_client_lib_ring_buffer_client_cb
*lttng_client_callbacks_discard
;
832 extern const struct lttng_ust_client_lib_ring_buffer_client_cb
*lttng_client_callbacks_overwrite
;
834 struct lttng_transport
*lttng_transport_find(const char *name
);
836 int lttng_probes_get_event_list(struct lttng_ust_tracepoint_list
*list
);
837 void lttng_probes_prune_event_list(struct lttng_ust_tracepoint_list
*list
);
838 struct lttng_ust_tracepoint_iter
*
839 lttng_ust_tracepoint_list_get_iter_next(struct lttng_ust_tracepoint_list
*list
);
840 int lttng_probes_get_field_list(struct lttng_ust_field_list
*list
);
841 void lttng_probes_prune_field_list(struct lttng_ust_field_list
*list
);
842 struct lttng_ust_field_iter
*
843 lttng_ust_field_list_get_iter_next(struct lttng_ust_field_list
*list
);
845 void lttng_free_event_filter_runtime(struct lttng_event
*event
);
847 struct cds_list_head
*lttng_get_probe_list_head(void);
848 int lttng_session_active(void);
850 typedef int (*t_statedump_func_ptr
)(struct lttng_session
*session
);
851 void lttng_handle_pending_statedump(void *owner
);
852 struct cds_list_head
*_lttng_get_sessions(void);
854 struct lttng_enum
*lttng_ust_enum_get_from_desc(struct lttng_session
*session
,
855 const struct lttng_enum_desc
*enum_desc
);
857 void lttng_ust_dl_update(void *ip
);
858 void lttng_ust_fixup_fd_tracker_tls(void);
864 #endif /* _LTTNG_UST_EVENTS_H */