1 /* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1)
5 * Holds LTTng per-session event registry.
7 * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
10 #ifndef _LTTNG_EVENTS_H
11 #define _LTTNG_EVENTS_H
13 #include <linux/version.h>
14 #include <linux/list.h>
15 #include <linux/kprobes.h>
16 #include <linux/kref.h>
17 #include <lttng-cpuhotplug.h>
18 #include <wrapper/uuid.h>
19 #include <wrapper/uprobes.h>
20 #include <lttng-tracer.h>
21 #include <lttng-abi.h>
22 #include <lttng-abi-old.h>
24 #define lttng_is_signed_type(type) (((type)(-1)) < 0)
28 struct lttng_metadata_cache
;
29 struct lib_ring_buffer_ctx
;
31 struct perf_event_attr
;
32 struct lib_ring_buffer_config
;
34 /* Type description */
43 atype_array_compound
, /* Array of compound types. */
44 atype_sequence_compound
, /* Sequence of compound types. */
47 atype_sequence_bitfield
,
51 enum lttng_string_encodings
{
52 lttng_encode_none
= 0,
53 lttng_encode_UTF8
= 1,
54 lttng_encode_ASCII
= 2,
63 struct lttng_enum_value
{
64 unsigned long long value
;
65 unsigned int signedness
:1;
68 struct lttng_enum_entry
{
69 struct lttng_enum_value start
, end
; /* start and end are inclusive */
72 unsigned int is_auto
:1;
76 #define __type_integer(_type, _size, _alignment, _signedness, \
77 _byte_order, _base, _encoding) \
79 .atype = atype_integer, \
82 .size = (_size) ? : sizeof(_type) * CHAR_BIT, \
83 .alignment = (_alignment) ? : lttng_alignof(_type) * CHAR_BIT, \
84 .signedness = (_signedness) >= 0 ? (_signedness) : lttng_is_signed_type(_type), \
85 .reverse_byte_order = _byte_order != __BYTE_ORDER, \
87 .encoding = lttng_encode_##_encoding, \
91 struct lttng_integer_type {
92 unsigned int size
; /* in bits */
93 unsigned short alignment
; /* in bits */
94 unsigned int signedness
:1,
96 unsigned int base
; /* 2, 8, 10, 16, for pretty print */
97 enum lttng_string_encodings encoding
;
100 union _lttng_basic_type
{
101 struct lttng_integer_type integer
;
103 const struct lttng_enum_desc
*desc
; /* Enumeration mapping */
104 struct lttng_integer_type container_type
;
107 enum lttng_string_encodings encoding
;
111 struct lttng_basic_type
{
112 enum abstract_types atype
;
114 union _lttng_basic_type basic
;
119 enum abstract_types atype
;
121 union _lttng_basic_type basic
;
123 struct lttng_basic_type elem_type
;
124 unsigned int length
; /* num. elems. */
125 unsigned int elem_alignment
; /* alignment override */
128 struct lttng_basic_type length_type
;
129 struct lttng_basic_type elem_type
;
130 unsigned int elem_alignment
; /* alignment override */
134 struct lttng_event_field
*fields
; /* Array of fields. */
137 struct lttng_type
*elem_type
;
138 unsigned int length
; /* num. elems. */
141 struct lttng_type
*elem_type
;
142 const char *length_name
;
145 const char *tag_name
;
146 struct lttng_event_field
*choices
; /* Array of fields. */
152 struct lttng_enum_desc
{
154 const struct lttng_enum_entry
*entries
;
155 unsigned int nr_entries
;
158 /* Event field description */
160 struct lttng_event_field
{
162 struct lttng_type type
;
163 unsigned int nowrite
:1, /* do not write into trace */
164 user
:1; /* fetch from user-space */
167 union lttng_ctx_value
{
174 * We need to keep this perf counter field separately from struct
175 * lttng_ctx_field because cpu hotplug needs fixed-location addresses.
177 struct lttng_perf_counter_field
{
178 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0))
179 struct lttng_cpuhp_node cpuhp_prepare
;
180 struct lttng_cpuhp_node cpuhp_online
;
182 struct notifier_block nb
;
185 struct perf_event_attr
*attr
;
186 struct perf_event
**e
; /* per-cpu array */
189 struct lttng_probe_ctx
{
190 struct lttng_event
*event
;
191 uint8_t interruptible
;
194 struct lttng_ctx_field
{
195 struct lttng_event_field event_field
;
196 size_t (*get_size
)(size_t offset
);
197 size_t (*get_size_arg
)(size_t offset
, struct lttng_ctx_field
*field
,
198 struct lib_ring_buffer_ctx
*ctx
,
199 struct lttng_channel
*chan
);
200 void (*record
)(struct lttng_ctx_field
*field
,
201 struct lib_ring_buffer_ctx
*ctx
,
202 struct lttng_channel
*chan
);
203 void (*get_value
)(struct lttng_ctx_field
*field
,
204 struct lttng_probe_ctx
*lttng_probe_ctx
,
205 union lttng_ctx_value
*value
);
207 struct lttng_perf_counter_field
*perf_counter
;
209 void (*destroy
)(struct lttng_ctx_field
*field
);
211 * Private data to keep state between get_size and record.
212 * User must perform its own synchronization to protect against
213 * concurrent and reentrant contexts.
219 struct lttng_ctx_field
*fields
;
220 unsigned int nr_fields
;
221 unsigned int allocated_fields
;
222 size_t largest_align
; /* in bytes */
225 struct lttng_event_desc
{
226 const char *name
; /* lttng-modules name */
227 const char *kname
; /* Linux kernel name (tracepoints) */
228 void *probe_callback
;
229 const struct lttng_event_ctx
*ctx
; /* context */
230 const struct lttng_event_field
*fields
; /* event payload */
231 unsigned int nr_fields
;
232 struct module
*owner
;
235 struct lttng_probe_desc
{
236 const char *provider
;
237 const struct lttng_event_desc
**event_desc
;
238 unsigned int nr_events
;
239 struct list_head head
; /* chain registered probes */
240 struct list_head lazy_init_head
;
241 int lazy
; /* lazy registration */
244 struct lttng_krp
; /* Kretprobe handling */
246 enum lttng_event_type
{
247 LTTNG_TYPE_EVENT
= 0,
248 LTTNG_TYPE_ENABLER
= 1,
251 struct lttng_filter_bytecode_node
{
252 struct list_head node
;
253 struct lttng_enabler
*enabler
;
255 * struct lttng_kernel_filter_bytecode has var. sized array, must be
258 struct lttng_kernel_filter_bytecode bc
;
262 * Filter return value masks.
264 enum lttng_filter_ret
{
265 LTTNG_FILTER_DISCARD
= 0,
266 LTTNG_FILTER_RECORD_FLAG
= (1ULL << 0),
267 /* Other bits are kept for future use. */
270 struct lttng_bytecode_runtime
{
271 /* Associated bytecode */
272 struct lttng_filter_bytecode_node
*bc
;
273 uint64_t (*filter
)(void *filter_data
, struct lttng_probe_ctx
*lttng_probe_ctx
,
274 const char *filter_stack_data
);
276 struct list_head node
; /* list of bytecode runtime in event */
277 struct lttng_event
*event
;
281 * Objects in a linked-list of enablers, owned by an event.
283 struct lttng_enabler_ref
{
284 struct list_head node
; /* enabler ref list */
285 struct lttng_enabler
*ref
; /* backward ref */
288 struct lttng_uprobe_handler
{
289 struct lttng_event
*event
;
291 struct uprobe_consumer up_consumer
;
292 struct list_head node
;
296 * lttng_event structure is referred to by the tracing fast path. It must be
300 enum lttng_event_type evtype
; /* First field. */
302 struct lttng_channel
*chan
;
304 const struct lttng_event_desc
*desc
;
306 struct lttng_ctx
*ctx
;
307 enum lttng_kernel_instrumentation instrumentation
;
314 struct lttng_krp
*lttng_krp
;
322 struct list_head head
;
325 struct list_head list
; /* Event list in session */
326 unsigned int metadata_dumped
:1;
328 /* Backward references: list of lttng_enabler_ref (ref to enablers) */
329 struct list_head enablers_ref_head
;
330 struct hlist_node hlist
; /* session ht of events */
331 int registered
; /* has reg'd tracepoint probe */
332 /* list of struct lttng_bytecode_runtime, sorted by seqnum */
333 struct list_head bytecode_runtime_head
;
334 int has_enablers_without_bytecode
;
337 enum lttng_enabler_type
{
338 LTTNG_ENABLER_STAR_GLOB
,
343 * Enabler field, within whatever object is enabling an event. Target of
344 * backward reference.
346 struct lttng_enabler
{
347 enum lttng_event_type evtype
; /* First field. */
349 enum lttng_enabler_type type
;
351 struct list_head node
; /* per-session list of enablers */
352 /* head list of struct lttng_ust_filter_bytecode_node */
353 struct list_head filter_bytecode_head
;
355 struct lttng_kernel_event event_param
;
356 struct lttng_channel
*chan
;
357 struct lttng_ctx
*ctx
;
358 unsigned int enabled
:1;
361 struct lttng_channel_ops
{
362 struct channel
*(*channel_create
)(const char *name
,
363 struct lttng_channel
*lttng_chan
,
365 size_t subbuf_size
, size_t num_subbuf
,
366 unsigned int switch_timer_interval
,
367 unsigned int read_timer_interval
);
368 void (*channel_destroy
)(struct channel
*chan
);
369 struct lib_ring_buffer
*(*buffer_read_open
)(struct channel
*chan
);
370 int (*buffer_has_read_closed_stream
)(struct channel
*chan
);
371 void (*buffer_read_close
)(struct lib_ring_buffer
*buf
);
372 int (*event_reserve
)(struct lib_ring_buffer_ctx
*ctx
,
374 void (*event_commit
)(struct lib_ring_buffer_ctx
*ctx
);
375 void (*event_write
)(struct lib_ring_buffer_ctx
*ctx
, const void *src
,
377 void (*event_write_from_user
)(struct lib_ring_buffer_ctx
*ctx
,
378 const void *src
, size_t len
);
379 void (*event_memset
)(struct lib_ring_buffer_ctx
*ctx
,
381 void (*event_strcpy
)(struct lib_ring_buffer_ctx
*ctx
, const char *src
,
383 void (*event_strcpy_from_user
)(struct lib_ring_buffer_ctx
*ctx
,
384 const char __user
*src
, size_t len
);
386 * packet_avail_size returns the available size in the current
387 * packet. Note that the size returned is only a hint, since it
388 * may change due to concurrent writes.
390 size_t (*packet_avail_size
)(struct channel
*chan
);
391 wait_queue_head_t
*(*get_writer_buf_wait_queue
)(struct channel
*chan
, int cpu
);
392 wait_queue_head_t
*(*get_hp_wait_queue
)(struct channel
*chan
);
393 int (*is_finalized
)(struct channel
*chan
);
394 int (*is_disabled
)(struct channel
*chan
);
395 int (*timestamp_begin
) (const struct lib_ring_buffer_config
*config
,
396 struct lib_ring_buffer
*bufb
,
397 uint64_t *timestamp_begin
);
398 int (*timestamp_end
) (const struct lib_ring_buffer_config
*config
,
399 struct lib_ring_buffer
*bufb
,
400 uint64_t *timestamp_end
);
401 int (*events_discarded
) (const struct lib_ring_buffer_config
*config
,
402 struct lib_ring_buffer
*bufb
,
403 uint64_t *events_discarded
);
404 int (*content_size
) (const struct lib_ring_buffer_config
*config
,
405 struct lib_ring_buffer
*bufb
,
406 uint64_t *content_size
);
407 int (*packet_size
) (const struct lib_ring_buffer_config
*config
,
408 struct lib_ring_buffer
*bufb
,
409 uint64_t *packet_size
);
410 int (*stream_id
) (const struct lib_ring_buffer_config
*config
,
411 struct lib_ring_buffer
*bufb
,
412 uint64_t *stream_id
);
413 int (*current_timestamp
) (const struct lib_ring_buffer_config
*config
,
414 struct lib_ring_buffer
*bufb
,
416 int (*sequence_number
) (const struct lib_ring_buffer_config
*config
,
417 struct lib_ring_buffer
*bufb
,
419 int (*instance_id
) (const struct lib_ring_buffer_config
*config
,
420 struct lib_ring_buffer
*bufb
,
424 struct lttng_transport
{
426 struct module
*owner
;
427 struct list_head node
;
428 struct lttng_channel_ops ops
;
431 struct lttng_syscall_filter
;
433 #define LTTNG_EVENT_HT_BITS 12
434 #define LTTNG_EVENT_HT_SIZE (1U << LTTNG_EVENT_HT_BITS)
436 struct lttng_event_ht
{
437 struct hlist_head table
[LTTNG_EVENT_HT_SIZE
];
440 struct lttng_channel
{
442 struct channel
*chan
; /* Channel buffers */
444 struct lttng_ctx
*ctx
;
445 /* Event ID management */
446 struct lttng_session
*session
;
447 struct file
*file
; /* File associated to channel */
448 unsigned int free_event_id
; /* Next event ID to allocate */
449 struct list_head list
; /* Channel list */
450 struct lttng_channel_ops
*ops
;
451 struct lttng_transport
*transport
;
452 struct lttng_event
**sc_table
; /* for syscall tracing */
453 struct lttng_event
**compat_sc_table
;
454 struct lttng_event
**sc_exit_table
; /* for syscall exit tracing */
455 struct lttng_event
**compat_sc_exit_table
;
456 struct lttng_event
*sc_unknown
; /* for unknown syscalls */
457 struct lttng_event
*sc_compat_unknown
;
458 struct lttng_event
*sc_exit_unknown
;
459 struct lttng_event
*compat_sc_exit_unknown
;
460 struct lttng_syscall_filter
*sc_filter
;
461 int header_type
; /* 0: unset, 1: compact, 2: large */
462 enum channel_type channel_type
;
463 unsigned int metadata_dumped
:1,
464 sys_enter_registered
:1,
465 sys_exit_registered
:1,
467 tstate
:1; /* Transient enable state */
470 struct lttng_metadata_stream
{
471 void *priv
; /* Ring buffer private data */
472 struct lttng_metadata_cache
*metadata_cache
;
473 unsigned int metadata_in
; /* Bytes read from the cache */
474 unsigned int metadata_out
; /* Bytes consumed from stream */
475 int finalized
; /* Has channel been finalized */
476 wait_queue_head_t read_wait
; /* Reader buffer-level wait queue */
477 struct list_head list
; /* Stream list */
478 struct lttng_transport
*transport
;
479 uint64_t version
; /* Current version of the metadata cache */
482 #define LTTNG_DYNAMIC_LEN_STACK_SIZE 128
484 struct lttng_dynamic_len_stack
{
485 size_t stack
[LTTNG_DYNAMIC_LEN_STACK_SIZE
];
489 DECLARE_PER_CPU(struct lttng_dynamic_len_stack
, lttng_dynamic_len_stack
);
492 * struct lttng_pid_tracker declared in header due to deferencing of *v
493 * in RCU_INITIALIZER(v).
495 #define LTTNG_PID_HASH_BITS 6
496 #define LTTNG_PID_TABLE_SIZE (1 << LTTNG_PID_HASH_BITS)
498 struct lttng_pid_tracker
{
499 struct hlist_head pid_hash
[LTTNG_PID_TABLE_SIZE
];
502 struct lttng_pid_hash_node
{
503 struct hlist_node hlist
;
507 struct lttng_session
{
508 int active
; /* Is trace session active ? */
509 int been_active
; /* Has trace session been active ? */
510 struct file
*file
; /* File associated to session */
511 struct list_head chan
; /* Channel list head */
512 struct list_head events
; /* Event list head */
513 struct list_head list
; /* Session list */
514 unsigned int free_chan_id
; /* Next chan ID to allocate */
515 uuid_le uuid
; /* Trace session unique ID */
516 struct lttng_metadata_cache
*metadata_cache
;
517 struct lttng_pid_tracker
*pid_tracker
;
518 unsigned int metadata_dumped
:1,
519 tstate
:1; /* Transient enable state */
520 /* List of enablers */
521 struct list_head enablers_head
;
522 /* Hash table of events */
523 struct lttng_event_ht events_ht
;
526 struct lttng_metadata_cache
{
527 char *data
; /* Metadata cache */
528 unsigned int cache_alloc
; /* Metadata allocated size (bytes) */
529 unsigned int metadata_written
; /* Number of bytes written in metadata cache */
530 struct kref refcount
; /* Metadata cache usage */
531 struct list_head metadata_stream
; /* Metadata stream list */
532 uuid_le uuid
; /* Trace session unique ID (copy) */
533 struct mutex lock
; /* Produce/consume lock */
534 uint64_t version
; /* Current version of the metadata */
537 void lttng_lock_sessions(void);
538 void lttng_unlock_sessions(void);
540 struct list_head
*lttng_get_probe_list_head(void);
542 struct lttng_enabler
*lttng_enabler_create(enum lttng_enabler_type type
,
543 struct lttng_kernel_event
*event_param
,
544 struct lttng_channel
*chan
);
546 int lttng_enabler_enable(struct lttng_enabler
*enabler
);
547 int lttng_enabler_disable(struct lttng_enabler
*enabler
);
548 int lttng_fix_pending_events(void);
549 int lttng_session_active(void);
551 struct lttng_session
*lttng_session_create(void);
552 int lttng_session_enable(struct lttng_session
*session
);
553 int lttng_session_disable(struct lttng_session
*session
);
554 void lttng_session_destroy(struct lttng_session
*session
);
555 int lttng_session_metadata_regenerate(struct lttng_session
*session
);
556 int lttng_session_statedump(struct lttng_session
*session
);
557 void metadata_cache_destroy(struct kref
*kref
);
559 struct lttng_channel
*lttng_channel_create(struct lttng_session
*session
,
560 const char *transport_name
,
562 size_t subbuf_size
, size_t num_subbuf
,
563 unsigned int switch_timer_interval
,
564 unsigned int read_timer_interval
,
565 enum channel_type channel_type
);
566 struct lttng_channel
*lttng_global_channel_create(struct lttng_session
*session
,
567 int overwrite
, void *buf_addr
,
568 size_t subbuf_size
, size_t num_subbuf
,
569 unsigned int switch_timer_interval
,
570 unsigned int read_timer_interval
);
572 void lttng_metadata_channel_destroy(struct lttng_channel
*chan
);
573 struct lttng_event
*lttng_event_create(struct lttng_channel
*chan
,
574 struct lttng_kernel_event
*event_param
,
576 const struct lttng_event_desc
*event_desc
,
577 enum lttng_kernel_instrumentation itype
);
578 struct lttng_event
*_lttng_event_create(struct lttng_channel
*chan
,
579 struct lttng_kernel_event
*event_param
,
581 const struct lttng_event_desc
*event_desc
,
582 enum lttng_kernel_instrumentation itype
);
583 struct lttng_event
*lttng_event_compat_old_create(struct lttng_channel
*chan
,
584 struct lttng_kernel_old_event
*old_event_param
,
586 const struct lttng_event_desc
*internal_desc
);
588 int lttng_channel_enable(struct lttng_channel
*channel
);
589 int lttng_channel_disable(struct lttng_channel
*channel
);
590 int lttng_event_enable(struct lttng_event
*event
);
591 int lttng_event_disable(struct lttng_event
*event
);
593 void lttng_transport_register(struct lttng_transport
*transport
);
594 void lttng_transport_unregister(struct lttng_transport
*transport
);
596 void synchronize_trace(void);
597 int lttng_abi_init(void);
598 int lttng_abi_compat_old_init(void);
599 void lttng_abi_exit(void);
600 void lttng_abi_compat_old_exit(void);
602 int lttng_probe_register(struct lttng_probe_desc
*desc
);
603 void lttng_probe_unregister(struct lttng_probe_desc
*desc
);
604 const struct lttng_event_desc
*lttng_event_get(const char *name
);
605 void lttng_event_put(const struct lttng_event_desc
*desc
);
606 int lttng_probes_init(void);
607 void lttng_probes_exit(void);
609 int lttng_metadata_output_channel(struct lttng_metadata_stream
*stream
,
610 struct channel
*chan
);
612 int lttng_pid_tracker_get_node_pid(const struct lttng_pid_hash_node
*node
);
613 struct lttng_pid_tracker
*lttng_pid_tracker_create(void);
614 void lttng_pid_tracker_destroy(struct lttng_pid_tracker
*lpf
);
615 bool lttng_pid_tracker_lookup(struct lttng_pid_tracker
*lpf
, int pid
);
616 int lttng_pid_tracker_add(struct lttng_pid_tracker
*lpf
, int pid
);
617 int lttng_pid_tracker_del(struct lttng_pid_tracker
*lpf
, int pid
);
619 int lttng_session_track_pid(struct lttng_session
*session
, int pid
);
620 int lttng_session_untrack_pid(struct lttng_session
*session
, int pid
);
622 int lttng_session_list_tracker_pids(struct lttng_session
*session
);
624 void lttng_clock_ref(void);
625 void lttng_clock_unref(void);
627 #if defined(CONFIG_HAVE_SYSCALL_TRACEPOINTS)
628 int lttng_syscalls_register(struct lttng_channel
*chan
, void *filter
);
629 int lttng_syscalls_unregister(struct lttng_channel
*chan
);
630 int lttng_syscall_filter_enable(struct lttng_channel
*chan
,
632 int lttng_syscall_filter_disable(struct lttng_channel
*chan
,
634 long lttng_channel_syscall_mask(struct lttng_channel
*channel
,
635 struct lttng_kernel_syscall_mask __user
*usyscall_mask
);
637 static inline int lttng_syscalls_register(struct lttng_channel
*chan
, void *filter
)
642 static inline int lttng_syscalls_unregister(struct lttng_channel
*chan
)
647 static inline int lttng_syscall_filter_enable(struct lttng_channel
*chan
,
653 static inline int lttng_syscall_filter_disable(struct lttng_channel
*chan
,
659 static inline long lttng_channel_syscall_mask(struct lttng_channel
*channel
,
660 struct lttng_kernel_syscall_mask __user
*usyscall_mask
)
666 void lttng_filter_sync_state(struct lttng_bytecode_runtime
*runtime
);
667 int lttng_enabler_attach_bytecode(struct lttng_enabler
*enabler
,
668 struct lttng_kernel_filter_bytecode __user
*bytecode
);
669 void lttng_enabler_event_link_bytecode(struct lttng_event
*event
,
670 struct lttng_enabler
*enabler
);
672 int lttng_probes_init(void);
674 extern struct lttng_ctx
*lttng_static_ctx
;
676 int lttng_context_init(void);
677 void lttng_context_exit(void);
678 struct lttng_ctx_field
*lttng_append_context(struct lttng_ctx
**ctx
);
679 void lttng_context_update(struct lttng_ctx
*ctx
);
680 int lttng_find_context(struct lttng_ctx
*ctx
, const char *name
);
681 int lttng_get_context_index(struct lttng_ctx
*ctx
, const char *name
);
682 void lttng_remove_context_field(struct lttng_ctx
**ctx
,
683 struct lttng_ctx_field
*field
);
684 void lttng_destroy_context(struct lttng_ctx
*ctx
);
685 int lttng_add_pid_to_ctx(struct lttng_ctx
**ctx
);
686 int lttng_add_cpu_id_to_ctx(struct lttng_ctx
**ctx
);
687 int lttng_add_procname_to_ctx(struct lttng_ctx
**ctx
);
688 int lttng_add_prio_to_ctx(struct lttng_ctx
**ctx
);
689 int lttng_add_nice_to_ctx(struct lttng_ctx
**ctx
);
690 int lttng_add_vpid_to_ctx(struct lttng_ctx
**ctx
);
691 int lttng_add_tid_to_ctx(struct lttng_ctx
**ctx
);
692 int lttng_add_vtid_to_ctx(struct lttng_ctx
**ctx
);
693 int lttng_add_ppid_to_ctx(struct lttng_ctx
**ctx
);
694 int lttng_add_vppid_to_ctx(struct lttng_ctx
**ctx
);
695 int lttng_add_hostname_to_ctx(struct lttng_ctx
**ctx
);
696 int lttng_add_interruptible_to_ctx(struct lttng_ctx
**ctx
);
697 int lttng_add_need_reschedule_to_ctx(struct lttng_ctx
**ctx
);
698 #if defined(CONFIG_PREEMPT_RT_FULL) || defined(CONFIG_PREEMPT)
699 int lttng_add_preemptible_to_ctx(struct lttng_ctx
**ctx
);
702 int lttng_add_preemptible_to_ctx(struct lttng_ctx
**ctx
)
707 #ifdef CONFIG_PREEMPT_RT_FULL
708 int lttng_add_migratable_to_ctx(struct lttng_ctx
**ctx
);
711 int lttng_add_migratable_to_ctx(struct lttng_ctx
**ctx
)
717 int lttng_add_callstack_to_ctx(struct lttng_ctx
**ctx
, int type
);
719 #if defined(CONFIG_PERF_EVENTS) && (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,33))
720 int lttng_add_perf_counter_to_ctx(uint32_t type
,
723 struct lttng_ctx
**ctx
);
724 int lttng_cpuhp_perf_counter_online(unsigned int cpu
,
725 struct lttng_cpuhp_node
*node
);
726 int lttng_cpuhp_perf_counter_dead(unsigned int cpu
,
727 struct lttng_cpuhp_node
*node
);
730 int lttng_add_perf_counter_to_ctx(uint32_t type
,
733 struct lttng_ctx
**ctx
)
738 int lttng_cpuhp_perf_counter_online(unsigned int cpu
,
739 struct lttng_cpuhp_node
*node
)
744 int lttng_cpuhp_perf_counter_dead(unsigned int cpu
,
745 struct lttng_cpuhp_node
*node
)
751 int lttng_logger_init(void);
752 void lttng_logger_exit(void);
754 extern int lttng_statedump_start(struct lttng_session
*session
);
756 #ifdef CONFIG_KPROBES
757 int lttng_kprobes_register(const char *name
,
758 const char *symbol_name
,
761 struct lttng_event
*event
);
762 void lttng_kprobes_unregister(struct lttng_event
*event
);
763 void lttng_kprobes_destroy_private(struct lttng_event
*event
);
766 int lttng_kprobes_register(const char *name
,
767 const char *symbol_name
,
770 struct lttng_event
*event
)
776 void lttng_kprobes_unregister(struct lttng_event
*event
)
781 void lttng_kprobes_destroy_private(struct lttng_event
*event
)
786 int lttng_event_add_callsite(struct lttng_event
*event
,
787 struct lttng_kernel_event_callsite
*callsite
);
789 #ifdef CONFIG_UPROBES
790 int lttng_uprobes_register(const char *name
,
791 int fd
, struct lttng_event
*event
);
792 int lttng_uprobes_add_callsite(struct lttng_event
*event
,
793 struct lttng_kernel_event_callsite
*callsite
);
794 void lttng_uprobes_unregister(struct lttng_event
*event
);
795 void lttng_uprobes_destroy_private(struct lttng_event
*event
);
798 int lttng_uprobes_register(const char *name
,
799 int fd
, struct lttng_event
*event
)
805 int lttng_uprobes_add_callsite(struct lttng_event
*event
,
806 struct lttng_kernel_event_callsite
*callsite
)
812 void lttng_uprobes_unregister(struct lttng_event
*event
)
817 void lttng_uprobes_destroy_private(struct lttng_event
*event
)
822 #ifdef CONFIG_KRETPROBES
823 int lttng_kretprobes_register(const char *name
,
824 const char *symbol_name
,
827 struct lttng_event
*event_entry
,
828 struct lttng_event
*event_exit
);
829 void lttng_kretprobes_unregister(struct lttng_event
*event
);
830 void lttng_kretprobes_destroy_private(struct lttng_event
*event
);
831 int lttng_kretprobes_event_enable_state(struct lttng_event
*event
,
835 int lttng_kretprobes_register(const char *name
,
836 const char *symbol_name
,
839 struct lttng_event
*event_entry
,
840 struct lttng_event
*event_exit
)
846 void lttng_kretprobes_unregister(struct lttng_event
*event
)
851 void lttng_kretprobes_destroy_private(struct lttng_event
*event
)
856 int lttng_kretprobes_event_enable_state(struct lttng_event
*event
,
863 #if defined(CONFIG_DYNAMIC_FTRACE) && !defined(LTTNG_FTRACE_MISSING_HEADER)
864 int lttng_ftrace_register(const char *name
,
865 const char *symbol_name
,
866 struct lttng_event
*event
);
867 void lttng_ftrace_unregister(struct lttng_event
*event
);
868 void lttng_ftrace_destroy_private(struct lttng_event
*event
);
871 int lttng_ftrace_register(const char *name
,
872 const char *symbol_name
,
873 struct lttng_event
*event
)
879 void lttng_ftrace_unregister(struct lttng_event
*event
)
884 void lttng_ftrace_destroy_private(struct lttng_event
*event
)
889 int lttng_calibrate(struct lttng_kernel_calibrate
*calibrate
);
891 extern const struct file_operations lttng_tracepoint_list_fops
;
892 extern const struct file_operations lttng_syscall_list_fops
;
894 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
895 #define TRACEPOINT_HAS_DATA_ARG
898 #endif /* _LTTNG_EVENTS_H */