1 #ifndef _LTTNG_EVENTS_H
2 #define _LTTNG_EVENTS_H
7 * Holds LTTng per-session event registry.
9 * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
11 * This library is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU Lesser General Public
13 * License as published by the Free Software Foundation; only
14 * version 2.1 of the License.
16 * This library is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * Lesser General Public License for more details.
21 * You should have received a copy of the GNU Lesser General Public
22 * License along with this library; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
26 #include <linux/version.h>
27 #include <linux/list.h>
28 #include <linux/kprobes.h>
29 #include <linux/kref.h>
30 #include <lttng-cpuhotplug.h>
31 #include <wrapper/uuid.h>
32 #include <lttng-tracer.h>
33 #include <lttng-abi.h>
34 #include <lttng-abi-old.h>
36 #define lttng_is_signed_type(type) (((type)(-1)) < 0)
40 struct lttng_metadata_cache
;
41 struct lib_ring_buffer_ctx
;
43 struct perf_event_attr
;
44 struct lib_ring_buffer_config
;
46 /* Type description */
55 atype_array_compound
, /* Array of compound types. */
56 atype_sequence_compound
, /* Sequence of compound types. */
59 atype_sequence_bitfield
,
63 enum lttng_string_encodings
{
64 lttng_encode_none
= 0,
65 lttng_encode_UTF8
= 1,
66 lttng_encode_ASCII
= 2,
75 struct lttng_enum_value
{
76 unsigned long long value
;
77 unsigned int signedness
:1;
80 struct lttng_enum_entry
{
81 struct lttng_enum_value start
, end
; /* start and end are inclusive */
84 unsigned int is_auto
:1;
88 #define __type_integer(_type, _size, _alignment, _signedness, \
89 _byte_order, _base, _encoding) \
91 .atype = atype_integer, \
94 .size = (_size) ? : sizeof(_type) * CHAR_BIT, \
95 .alignment = (_alignment) ? : lttng_alignof(_type) * CHAR_BIT, \
96 .signedness = (_signedness) >= 0 ? (_signedness) : lttng_is_signed_type(_type), \
97 .reverse_byte_order = _byte_order != __BYTE_ORDER, \
99 .encoding = lttng_encode_##_encoding, \
103 struct lttng_integer_type {
104 unsigned int size
; /* in bits */
105 unsigned short alignment
; /* in bits */
106 unsigned int signedness
:1,
107 reverse_byte_order
:1;
108 unsigned int base
; /* 2, 8, 10, 16, for pretty print */
109 enum lttng_string_encodings encoding
;
112 union _lttng_basic_type
{
113 struct lttng_integer_type integer
;
115 const struct lttng_enum_desc
*desc
; /* Enumeration mapping */
116 struct lttng_integer_type container_type
;
119 enum lttng_string_encodings encoding
;
123 struct lttng_basic_type
{
124 enum abstract_types atype
;
126 union _lttng_basic_type basic
;
131 enum abstract_types atype
;
133 union _lttng_basic_type basic
;
135 struct lttng_basic_type elem_type
;
136 unsigned int length
; /* num. elems. */
137 unsigned int elem_alignment
; /* alignment override */
140 struct lttng_basic_type length_type
;
141 struct lttng_basic_type elem_type
;
142 unsigned int elem_alignment
; /* alignment override */
146 struct lttng_event_field
*fields
; /* Array of fields. */
149 struct lttng_type
*elem_type
;
150 unsigned int length
; /* num. elems. */
153 struct lttng_type
*elem_type
;
154 const char *length_name
;
157 const char *tag_name
;
158 struct lttng_event_field
*choices
; /* Array of fields. */
164 struct lttng_enum_desc
{
166 const struct lttng_enum_entry
*entries
;
167 unsigned int nr_entries
;
170 /* Event field description */
172 struct lttng_event_field
{
174 struct lttng_type type
;
175 unsigned int nowrite
:1, /* do not write into trace */
176 user
:1; /* fetch from user-space */
179 union lttng_ctx_value
{
186 * We need to keep this perf counter field separately from struct
187 * lttng_ctx_field because cpu hotplug needs fixed-location addresses.
189 struct lttng_perf_counter_field
{
190 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0))
191 struct lttng_cpuhp_node cpuhp_prepare
;
192 struct lttng_cpuhp_node cpuhp_online
;
194 struct notifier_block nb
;
197 struct perf_event_attr
*attr
;
198 struct perf_event
**e
; /* per-cpu array */
201 struct lttng_probe_ctx
{
202 struct lttng_event
*event
;
203 uint8_t interruptible
;
206 struct lttng_ctx_field
{
207 struct lttng_event_field event_field
;
208 size_t (*get_size
)(size_t offset
);
209 size_t (*get_size_arg
)(size_t offset
, struct lttng_ctx_field
*field
,
210 struct lib_ring_buffer_ctx
*ctx
,
211 struct lttng_channel
*chan
);
212 void (*record
)(struct lttng_ctx_field
*field
,
213 struct lib_ring_buffer_ctx
*ctx
,
214 struct lttng_channel
*chan
);
215 void (*get_value
)(struct lttng_ctx_field
*field
,
216 struct lttng_probe_ctx
*lttng_probe_ctx
,
217 union lttng_ctx_value
*value
);
219 struct lttng_perf_counter_field
*perf_counter
;
221 void (*destroy
)(struct lttng_ctx_field
*field
);
223 * Private data to keep state between get_size and record.
224 * User must perform its own synchronization to protect against
225 * concurrent and reentrant contexts.
231 struct lttng_ctx_field
*fields
;
232 unsigned int nr_fields
;
233 unsigned int allocated_fields
;
234 size_t largest_align
; /* in bytes */
237 struct lttng_event_desc
{
238 const char *name
; /* lttng-modules name */
239 const char *kname
; /* Linux kernel name (tracepoints) */
240 void *probe_callback
;
241 const struct lttng_event_ctx
*ctx
; /* context */
242 const struct lttng_event_field
*fields
; /* event payload */
243 unsigned int nr_fields
;
244 struct module
*owner
;
247 struct lttng_probe_desc
{
248 const char *provider
;
249 const struct lttng_event_desc
**event_desc
;
250 unsigned int nr_events
;
251 struct list_head head
; /* chain registered probes */
252 struct list_head lazy_init_head
;
253 int lazy
; /* lazy registration */
256 struct lttng_krp
; /* Kretprobe handling */
258 enum lttng_event_type
{
259 LTTNG_TYPE_EVENT
= 0,
260 LTTNG_TYPE_ENABLER
= 1,
263 struct lttng_filter_bytecode_node
{
264 struct list_head node
;
265 struct lttng_enabler
*enabler
;
267 * struct lttng_kernel_filter_bytecode has var. sized array, must be
270 struct lttng_kernel_filter_bytecode bc
;
274 * Filter return value masks.
276 enum lttng_filter_ret
{
277 LTTNG_FILTER_DISCARD
= 0,
278 LTTNG_FILTER_RECORD_FLAG
= (1ULL << 0),
279 /* Other bits are kept for future use. */
282 struct lttng_bytecode_runtime
{
283 /* Associated bytecode */
284 struct lttng_filter_bytecode_node
*bc
;
285 uint64_t (*filter
)(void *filter_data
, struct lttng_probe_ctx
*lttng_probe_ctx
,
286 const char *filter_stack_data
);
288 struct list_head node
; /* list of bytecode runtime in event */
289 struct lttng_event
*event
;
293 * Objects in a linked-list of enablers, owned by an event.
295 struct lttng_enabler_ref
{
296 struct list_head node
; /* enabler ref list */
297 struct lttng_enabler
*ref
; /* backward ref */
301 * lttng_event structure is referred to by the tracing fast path. It must be
305 enum lttng_event_type evtype
; /* First field. */
307 struct lttng_channel
*chan
;
309 const struct lttng_event_desc
*desc
;
311 struct lttng_ctx
*ctx
;
312 enum lttng_kernel_instrumentation instrumentation
;
319 struct lttng_krp
*lttng_krp
;
326 struct list_head list
; /* Event list in session */
327 unsigned int metadata_dumped
:1;
329 /* Backward references: list of lttng_enabler_ref (ref to enablers) */
330 struct list_head enablers_ref_head
;
331 struct hlist_node hlist
; /* session ht of events */
332 int registered
; /* has reg'd tracepoint probe */
333 /* list of struct lttng_bytecode_runtime, sorted by seqnum */
334 struct list_head bytecode_runtime_head
;
335 int has_enablers_without_bytecode
;
338 enum lttng_enabler_type
{
339 LTTNG_ENABLER_STAR_GLOB
,
344 * Enabler field, within whatever object is enabling an event. Target of
345 * backward reference.
347 struct lttng_enabler
{
348 enum lttng_event_type evtype
; /* First field. */
350 enum lttng_enabler_type type
;
352 struct list_head node
; /* per-session list of enablers */
353 /* head list of struct lttng_ust_filter_bytecode_node */
354 struct list_head filter_bytecode_head
;
356 struct lttng_kernel_event event_param
;
357 struct lttng_channel
*chan
;
358 struct lttng_ctx
*ctx
;
359 unsigned int enabled
:1;
362 struct lttng_channel_ops
{
363 struct channel
*(*channel_create
)(const char *name
,
364 struct lttng_channel
*lttng_chan
,
366 size_t subbuf_size
, size_t num_subbuf
,
367 unsigned int switch_timer_interval
,
368 unsigned int read_timer_interval
);
369 void (*channel_destroy
)(struct channel
*chan
);
370 struct lib_ring_buffer
*(*buffer_read_open
)(struct channel
*chan
);
371 int (*buffer_has_read_closed_stream
)(struct channel
*chan
);
372 void (*buffer_read_close
)(struct lib_ring_buffer
*buf
);
373 int (*event_reserve
)(struct lib_ring_buffer_ctx
*ctx
,
375 void (*event_commit
)(struct lib_ring_buffer_ctx
*ctx
);
376 void (*event_write
)(struct lib_ring_buffer_ctx
*ctx
, const void *src
,
378 void (*event_write_from_user
)(struct lib_ring_buffer_ctx
*ctx
,
379 const void *src
, size_t len
);
380 void (*event_memset
)(struct lib_ring_buffer_ctx
*ctx
,
382 void (*event_strcpy
)(struct lib_ring_buffer_ctx
*ctx
, const char *src
,
384 void (*event_strcpy_from_user
)(struct lib_ring_buffer_ctx
*ctx
,
385 const char __user
*src
, size_t len
);
387 * packet_avail_size returns the available size in the current
388 * packet. Note that the size returned is only a hint, since it
389 * may change due to concurrent writes.
391 size_t (*packet_avail_size
)(struct channel
*chan
);
392 wait_queue_head_t
*(*get_writer_buf_wait_queue
)(struct channel
*chan
, int cpu
);
393 wait_queue_head_t
*(*get_hp_wait_queue
)(struct channel
*chan
);
394 int (*is_finalized
)(struct channel
*chan
);
395 int (*is_disabled
)(struct channel
*chan
);
396 int (*timestamp_begin
) (const struct lib_ring_buffer_config
*config
,
397 struct lib_ring_buffer
*bufb
,
398 uint64_t *timestamp_begin
);
399 int (*timestamp_end
) (const struct lib_ring_buffer_config
*config
,
400 struct lib_ring_buffer
*bufb
,
401 uint64_t *timestamp_end
);
402 int (*events_discarded
) (const struct lib_ring_buffer_config
*config
,
403 struct lib_ring_buffer
*bufb
,
404 uint64_t *events_discarded
);
405 int (*content_size
) (const struct lib_ring_buffer_config
*config
,
406 struct lib_ring_buffer
*bufb
,
407 uint64_t *content_size
);
408 int (*packet_size
) (const struct lib_ring_buffer_config
*config
,
409 struct lib_ring_buffer
*bufb
,
410 uint64_t *packet_size
);
411 int (*stream_id
) (const struct lib_ring_buffer_config
*config
,
412 struct lib_ring_buffer
*bufb
,
413 uint64_t *stream_id
);
414 int (*current_timestamp
) (const struct lib_ring_buffer_config
*config
,
415 struct lib_ring_buffer
*bufb
,
417 int (*sequence_number
) (const struct lib_ring_buffer_config
*config
,
418 struct lib_ring_buffer
*bufb
,
420 int (*instance_id
) (const struct lib_ring_buffer_config
*config
,
421 struct lib_ring_buffer
*bufb
,
425 struct lttng_transport
{
427 struct module
*owner
;
428 struct list_head node
;
429 struct lttng_channel_ops ops
;
432 struct lttng_syscall_filter
;
434 #define LTTNG_EVENT_HT_BITS 12
435 #define LTTNG_EVENT_HT_SIZE (1U << LTTNG_EVENT_HT_BITS)
437 struct lttng_event_ht
{
438 struct hlist_head table
[LTTNG_EVENT_HT_SIZE
];
441 struct lttng_channel
{
443 struct channel
*chan
; /* Channel buffers */
445 struct lttng_ctx
*ctx
;
446 /* Event ID management */
447 struct lttng_session
*session
;
448 struct file
*file
; /* File associated to channel */
449 unsigned int free_event_id
; /* Next event ID to allocate */
450 struct list_head list
; /* Channel list */
451 struct lttng_channel_ops
*ops
;
452 struct lttng_transport
*transport
;
453 struct lttng_event
**sc_table
; /* for syscall tracing */
454 struct lttng_event
**compat_sc_table
;
455 struct lttng_event
**sc_exit_table
; /* for syscall exit tracing */
456 struct lttng_event
**compat_sc_exit_table
;
457 struct lttng_event
*sc_unknown
; /* for unknown syscalls */
458 struct lttng_event
*sc_compat_unknown
;
459 struct lttng_event
*sc_exit_unknown
;
460 struct lttng_event
*compat_sc_exit_unknown
;
461 struct lttng_syscall_filter
*sc_filter
;
462 int header_type
; /* 0: unset, 1: compact, 2: large */
463 enum channel_type channel_type
;
464 unsigned int metadata_dumped
:1,
465 sys_enter_registered
:1,
466 sys_exit_registered
:1,
468 tstate
:1; /* Transient enable state */
471 struct lttng_metadata_stream
{
472 void *priv
; /* Ring buffer private data */
473 struct lttng_metadata_cache
*metadata_cache
;
474 unsigned int metadata_in
; /* Bytes read from the cache */
475 unsigned int metadata_out
; /* Bytes consumed from stream */
476 int finalized
; /* Has channel been finalized */
477 wait_queue_head_t read_wait
; /* Reader buffer-level wait queue */
478 struct list_head list
; /* Stream list */
479 struct lttng_transport
*transport
;
480 uint64_t version
; /* Current version of the metadata cache */
483 #define LTTNG_DYNAMIC_LEN_STACK_SIZE 128
485 struct lttng_dynamic_len_stack
{
486 size_t stack
[LTTNG_DYNAMIC_LEN_STACK_SIZE
];
490 DECLARE_PER_CPU(struct lttng_dynamic_len_stack
, lttng_dynamic_len_stack
);
493 * struct lttng_pid_tracker declared in header due to deferencing of *v
494 * in RCU_INITIALIZER(v).
496 #define LTTNG_PID_HASH_BITS 6
497 #define LTTNG_PID_TABLE_SIZE (1 << LTTNG_PID_HASH_BITS)
499 struct lttng_pid_tracker
{
500 struct hlist_head pid_hash
[LTTNG_PID_TABLE_SIZE
];
503 struct lttng_pid_hash_node
{
504 struct hlist_node hlist
;
508 struct lttng_session
{
509 int active
; /* Is trace session active ? */
510 int been_active
; /* Has trace session been active ? */
511 struct file
*file
; /* File associated to session */
512 struct list_head chan
; /* Channel list head */
513 struct list_head events
; /* Event list head */
514 struct list_head list
; /* Session list */
515 unsigned int free_chan_id
; /* Next chan ID to allocate */
516 uuid_le uuid
; /* Trace session unique ID */
517 struct lttng_metadata_cache
*metadata_cache
;
518 struct lttng_pid_tracker
*pid_tracker
;
519 unsigned int metadata_dumped
:1,
520 tstate
:1; /* Transient enable state */
521 /* List of enablers */
522 struct list_head enablers_head
;
523 /* Hash table of events */
524 struct lttng_event_ht events_ht
;
527 struct lttng_metadata_cache
{
528 char *data
; /* Metadata cache */
529 unsigned int cache_alloc
; /* Metadata allocated size (bytes) */
530 unsigned int metadata_written
; /* Number of bytes written in metadata cache */
531 struct kref refcount
; /* Metadata cache usage */
532 struct list_head metadata_stream
; /* Metadata stream list */
533 uuid_le uuid
; /* Trace session unique ID (copy) */
534 struct mutex lock
; /* Produce/consume lock */
535 uint64_t version
; /* Current version of the metadata */
538 void lttng_lock_sessions(void);
539 void lttng_unlock_sessions(void);
541 struct list_head
*lttng_get_probe_list_head(void);
543 struct lttng_enabler
*lttng_enabler_create(enum lttng_enabler_type type
,
544 struct lttng_kernel_event
*event_param
,
545 struct lttng_channel
*chan
);
547 int lttng_enabler_enable(struct lttng_enabler
*enabler
);
548 int lttng_enabler_disable(struct lttng_enabler
*enabler
);
549 int lttng_fix_pending_events(void);
550 int lttng_session_active(void);
552 struct lttng_session
*lttng_session_create(void);
553 int lttng_session_enable(struct lttng_session
*session
);
554 int lttng_session_disable(struct lttng_session
*session
);
555 void lttng_session_destroy(struct lttng_session
*session
);
556 int lttng_session_metadata_regenerate(struct lttng_session
*session
);
557 int lttng_session_statedump(struct lttng_session
*session
);
558 void metadata_cache_destroy(struct kref
*kref
);
560 struct lttng_channel
*lttng_channel_create(struct lttng_session
*session
,
561 const char *transport_name
,
563 size_t subbuf_size
, size_t num_subbuf
,
564 unsigned int switch_timer_interval
,
565 unsigned int read_timer_interval
,
566 enum channel_type channel_type
);
567 struct lttng_channel
*lttng_global_channel_create(struct lttng_session
*session
,
568 int overwrite
, void *buf_addr
,
569 size_t subbuf_size
, size_t num_subbuf
,
570 unsigned int switch_timer_interval
,
571 unsigned int read_timer_interval
);
573 void lttng_metadata_channel_destroy(struct lttng_channel
*chan
);
574 struct lttng_event
*lttng_event_create(struct lttng_channel
*chan
,
575 struct lttng_kernel_event
*event_param
,
577 const struct lttng_event_desc
*event_desc
,
578 enum lttng_kernel_instrumentation itype
);
579 struct lttng_event
*_lttng_event_create(struct lttng_channel
*chan
,
580 struct lttng_kernel_event
*event_param
,
582 const struct lttng_event_desc
*event_desc
,
583 enum lttng_kernel_instrumentation itype
);
584 struct lttng_event
*lttng_event_compat_old_create(struct lttng_channel
*chan
,
585 struct lttng_kernel_old_event
*old_event_param
,
587 const struct lttng_event_desc
*internal_desc
);
589 int lttng_channel_enable(struct lttng_channel
*channel
);
590 int lttng_channel_disable(struct lttng_channel
*channel
);
591 int lttng_event_enable(struct lttng_event
*event
);
592 int lttng_event_disable(struct lttng_event
*event
);
594 void lttng_transport_register(struct lttng_transport
*transport
);
595 void lttng_transport_unregister(struct lttng_transport
*transport
);
597 void synchronize_trace(void);
598 int lttng_abi_init(void);
599 int lttng_abi_compat_old_init(void);
600 void lttng_abi_exit(void);
601 void lttng_abi_compat_old_exit(void);
603 int lttng_probe_register(struct lttng_probe_desc
*desc
);
604 void lttng_probe_unregister(struct lttng_probe_desc
*desc
);
605 const struct lttng_event_desc
*lttng_event_get(const char *name
);
606 void lttng_event_put(const struct lttng_event_desc
*desc
);
607 int lttng_probes_init(void);
608 void lttng_probes_exit(void);
610 int lttng_metadata_output_channel(struct lttng_metadata_stream
*stream
,
611 struct channel
*chan
);
613 int lttng_pid_tracker_get_node_pid(const struct lttng_pid_hash_node
*node
);
614 struct lttng_pid_tracker
*lttng_pid_tracker_create(void);
615 void lttng_pid_tracker_destroy(struct lttng_pid_tracker
*lpf
);
616 bool lttng_pid_tracker_lookup(struct lttng_pid_tracker
*lpf
, int pid
);
617 int lttng_pid_tracker_add(struct lttng_pid_tracker
*lpf
, int pid
);
618 int lttng_pid_tracker_del(struct lttng_pid_tracker
*lpf
, int pid
);
620 int lttng_session_track_pid(struct lttng_session
*session
, int pid
);
621 int lttng_session_untrack_pid(struct lttng_session
*session
, int pid
);
623 int lttng_session_list_tracker_pids(struct lttng_session
*session
);
625 void lttng_clock_ref(void);
626 void lttng_clock_unref(void);
628 #if defined(CONFIG_HAVE_SYSCALL_TRACEPOINTS)
629 int lttng_syscalls_register(struct lttng_channel
*chan
, void *filter
);
630 int lttng_syscalls_unregister(struct lttng_channel
*chan
);
631 int lttng_syscall_filter_enable(struct lttng_channel
*chan
,
633 int lttng_syscall_filter_disable(struct lttng_channel
*chan
,
635 long lttng_channel_syscall_mask(struct lttng_channel
*channel
,
636 struct lttng_kernel_syscall_mask __user
*usyscall_mask
);
638 static inline int lttng_syscalls_register(struct lttng_channel
*chan
, void *filter
)
643 static inline int lttng_syscalls_unregister(struct lttng_channel
*chan
)
648 static inline int lttng_syscall_filter_enable(struct lttng_channel
*chan
,
654 static inline int lttng_syscall_filter_disable(struct lttng_channel
*chan
,
660 static inline long lttng_channel_syscall_mask(struct lttng_channel
*channel
,
661 struct lttng_kernel_syscall_mask __user
*usyscall_mask
)
667 void lttng_filter_sync_state(struct lttng_bytecode_runtime
*runtime
);
668 int lttng_enabler_attach_bytecode(struct lttng_enabler
*enabler
,
669 struct lttng_kernel_filter_bytecode __user
*bytecode
);
670 void lttng_enabler_event_link_bytecode(struct lttng_event
*event
,
671 struct lttng_enabler
*enabler
);
673 int lttng_probes_init(void);
675 extern struct lttng_ctx
*lttng_static_ctx
;
677 int lttng_context_init(void);
678 void lttng_context_exit(void);
679 struct lttng_ctx_field
*lttng_append_context(struct lttng_ctx
**ctx
);
680 void lttng_context_update(struct lttng_ctx
*ctx
);
681 int lttng_find_context(struct lttng_ctx
*ctx
, const char *name
);
682 int lttng_get_context_index(struct lttng_ctx
*ctx
, const char *name
);
683 void lttng_remove_context_field(struct lttng_ctx
**ctx
,
684 struct lttng_ctx_field
*field
);
685 void lttng_destroy_context(struct lttng_ctx
*ctx
);
686 int lttng_add_pid_to_ctx(struct lttng_ctx
**ctx
);
687 int lttng_add_cpu_id_to_ctx(struct lttng_ctx
**ctx
);
688 int lttng_add_procname_to_ctx(struct lttng_ctx
**ctx
);
689 int lttng_add_prio_to_ctx(struct lttng_ctx
**ctx
);
690 int lttng_add_nice_to_ctx(struct lttng_ctx
**ctx
);
691 int lttng_add_vpid_to_ctx(struct lttng_ctx
**ctx
);
692 int lttng_add_tid_to_ctx(struct lttng_ctx
**ctx
);
693 int lttng_add_vtid_to_ctx(struct lttng_ctx
**ctx
);
694 int lttng_add_ppid_to_ctx(struct lttng_ctx
**ctx
);
695 int lttng_add_vppid_to_ctx(struct lttng_ctx
**ctx
);
696 int lttng_add_hostname_to_ctx(struct lttng_ctx
**ctx
);
697 int lttng_add_interruptible_to_ctx(struct lttng_ctx
**ctx
);
698 int lttng_add_need_reschedule_to_ctx(struct lttng_ctx
**ctx
);
699 #if defined(CONFIG_PREEMPT_RT_FULL) || defined(CONFIG_PREEMPT)
700 int lttng_add_preemptible_to_ctx(struct lttng_ctx
**ctx
);
703 int lttng_add_preemptible_to_ctx(struct lttng_ctx
**ctx
)
708 #ifdef CONFIG_PREEMPT_RT_FULL
709 int lttng_add_migratable_to_ctx(struct lttng_ctx
**ctx
);
712 int lttng_add_migratable_to_ctx(struct lttng_ctx
**ctx
)
718 int lttng_add_callstack_to_ctx(struct lttng_ctx
**ctx
, int type
);
720 #if defined(CONFIG_PERF_EVENTS) && (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,33))
721 int lttng_add_perf_counter_to_ctx(uint32_t type
,
724 struct lttng_ctx
**ctx
);
725 int lttng_cpuhp_perf_counter_online(unsigned int cpu
,
726 struct lttng_cpuhp_node
*node
);
727 int lttng_cpuhp_perf_counter_dead(unsigned int cpu
,
728 struct lttng_cpuhp_node
*node
);
731 int lttng_add_perf_counter_to_ctx(uint32_t type
,
734 struct lttng_ctx
**ctx
)
739 int lttng_cpuhp_perf_counter_online(unsigned int cpu
,
740 struct lttng_cpuhp_node
*node
)
745 int lttng_cpuhp_perf_counter_dead(unsigned int cpu
,
746 struct lttng_cpuhp_node
*node
)
752 int lttng_logger_init(void);
753 void lttng_logger_exit(void);
755 extern int lttng_statedump_start(struct lttng_session
*session
);
757 #ifdef CONFIG_KPROBES
758 int lttng_kprobes_register(const char *name
,
759 const char *symbol_name
,
762 struct lttng_event
*event
);
763 void lttng_kprobes_unregister(struct lttng_event
*event
);
764 void lttng_kprobes_destroy_private(struct lttng_event
*event
);
767 int lttng_kprobes_register(const char *name
,
768 const char *symbol_name
,
771 struct lttng_event
*event
)
777 void lttng_kprobes_unregister(struct lttng_event
*event
)
782 void lttng_kprobes_destroy_private(struct lttng_event
*event
)
787 #ifdef CONFIG_KRETPROBES
788 int lttng_kretprobes_register(const char *name
,
789 const char *symbol_name
,
792 struct lttng_event
*event_entry
,
793 struct lttng_event
*event_exit
);
794 void lttng_kretprobes_unregister(struct lttng_event
*event
);
795 void lttng_kretprobes_destroy_private(struct lttng_event
*event
);
796 int lttng_kretprobes_event_enable_state(struct lttng_event
*event
,
800 int lttng_kretprobes_register(const char *name
,
801 const char *symbol_name
,
804 struct lttng_event
*event_entry
,
805 struct lttng_event
*event_exit
)
811 void lttng_kretprobes_unregister(struct lttng_event
*event
)
816 void lttng_kretprobes_destroy_private(struct lttng_event
*event
)
821 int lttng_kretprobes_event_enable_state(struct lttng_event
*event
,
828 #if defined(CONFIG_DYNAMIC_FTRACE) && !defined(LTTNG_FTRACE_MISSING_HEADER)
829 int lttng_ftrace_register(const char *name
,
830 const char *symbol_name
,
831 struct lttng_event
*event
);
832 void lttng_ftrace_unregister(struct lttng_event
*event
);
833 void lttng_ftrace_destroy_private(struct lttng_event
*event
);
836 int lttng_ftrace_register(const char *name
,
837 const char *symbol_name
,
838 struct lttng_event
*event
)
844 void lttng_ftrace_unregister(struct lttng_event
*event
)
849 void lttng_ftrace_destroy_private(struct lttng_event
*event
)
854 int lttng_calibrate(struct lttng_kernel_calibrate
*calibrate
);
856 extern const struct file_operations lttng_tracepoint_list_fops
;
857 extern const struct file_operations lttng_syscall_list_fops
;
859 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
860 #define TRACEPOINT_HAS_DATA_ARG
863 #endif /* _LTTNG_EVENTS_H */