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
);
225 struct lttng_ctx_field
*fields
;
226 unsigned int nr_fields
;
227 unsigned int allocated_fields
;
228 size_t largest_align
; /* in bytes */
231 struct lttng_event_desc
{
232 const char *name
; /* lttng-modules name */
233 const char *kname
; /* Linux kernel name (tracepoints) */
234 void *probe_callback
;
235 const struct lttng_event_ctx
*ctx
; /* context */
236 const struct lttng_event_field
*fields
; /* event payload */
237 unsigned int nr_fields
;
238 struct module
*owner
;
241 struct lttng_probe_desc
{
242 const char *provider
;
243 const struct lttng_event_desc
**event_desc
;
244 unsigned int nr_events
;
245 struct list_head head
; /* chain registered probes */
246 struct list_head lazy_init_head
;
247 int lazy
; /* lazy registration */
250 struct lttng_krp
; /* Kretprobe handling */
252 enum lttng_event_type
{
253 LTTNG_TYPE_EVENT
= 0,
254 LTTNG_TYPE_ENABLER
= 1,
257 struct lttng_filter_bytecode_node
{
258 struct list_head node
;
259 struct lttng_enabler
*enabler
;
261 * struct lttng_kernel_filter_bytecode has var. sized array, must be
264 struct lttng_kernel_filter_bytecode bc
;
268 * Filter return value masks.
270 enum lttng_filter_ret
{
271 LTTNG_FILTER_DISCARD
= 0,
272 LTTNG_FILTER_RECORD_FLAG
= (1ULL << 0),
273 /* Other bits are kept for future use. */
276 struct lttng_bytecode_runtime
{
277 /* Associated bytecode */
278 struct lttng_filter_bytecode_node
*bc
;
279 uint64_t (*filter
)(void *filter_data
, struct lttng_probe_ctx
*lttng_probe_ctx
,
280 const char *filter_stack_data
);
282 struct list_head node
; /* list of bytecode runtime in event */
283 struct lttng_event
*event
;
287 * Objects in a linked-list of enablers, owned by an event.
289 struct lttng_enabler_ref
{
290 struct list_head node
; /* enabler ref list */
291 struct lttng_enabler
*ref
; /* backward ref */
295 * lttng_event structure is referred to by the tracing fast path. It must be
299 enum lttng_event_type evtype
; /* First field. */
301 struct lttng_channel
*chan
;
303 const struct lttng_event_desc
*desc
;
305 struct lttng_ctx
*ctx
;
306 enum lttng_kernel_instrumentation instrumentation
;
313 struct lttng_krp
*lttng_krp
;
320 struct list_head list
; /* Event list in session */
321 unsigned int metadata_dumped
:1;
323 /* Backward references: list of lttng_enabler_ref (ref to enablers) */
324 struct list_head enablers_ref_head
;
325 struct hlist_node hlist
; /* session ht of events */
326 int registered
; /* has reg'd tracepoint probe */
327 /* list of struct lttng_bytecode_runtime, sorted by seqnum */
328 struct list_head bytecode_runtime_head
;
329 int has_enablers_without_bytecode
;
332 enum lttng_enabler_type
{
333 LTTNG_ENABLER_STAR_GLOB
,
338 * Enabler field, within whatever object is enabling an event. Target of
339 * backward reference.
341 struct lttng_enabler
{
342 enum lttng_event_type evtype
; /* First field. */
344 enum lttng_enabler_type type
;
346 struct list_head node
; /* per-session list of enablers */
347 /* head list of struct lttng_ust_filter_bytecode_node */
348 struct list_head filter_bytecode_head
;
350 struct lttng_kernel_event event_param
;
351 struct lttng_channel
*chan
;
352 struct lttng_ctx
*ctx
;
353 unsigned int enabled
:1;
356 struct lttng_channel_ops
{
357 struct channel
*(*channel_create
)(const char *name
,
358 struct lttng_channel
*lttng_chan
,
360 size_t subbuf_size
, size_t num_subbuf
,
361 unsigned int switch_timer_interval
,
362 unsigned int read_timer_interval
);
363 void (*channel_destroy
)(struct channel
*chan
);
364 struct lib_ring_buffer
*(*buffer_read_open
)(struct channel
*chan
);
365 int (*buffer_has_read_closed_stream
)(struct channel
*chan
);
366 void (*buffer_read_close
)(struct lib_ring_buffer
*buf
);
367 int (*event_reserve
)(struct lib_ring_buffer_ctx
*ctx
,
369 void (*event_commit
)(struct lib_ring_buffer_ctx
*ctx
);
370 void (*event_write
)(struct lib_ring_buffer_ctx
*ctx
, const void *src
,
372 void (*event_write_from_user
)(struct lib_ring_buffer_ctx
*ctx
,
373 const void *src
, size_t len
);
374 void (*event_memset
)(struct lib_ring_buffer_ctx
*ctx
,
376 void (*event_strcpy
)(struct lib_ring_buffer_ctx
*ctx
, const char *src
,
378 void (*event_strcpy_from_user
)(struct lib_ring_buffer_ctx
*ctx
,
379 const char __user
*src
, size_t len
);
381 * packet_avail_size returns the available size in the current
382 * packet. Note that the size returned is only a hint, since it
383 * may change due to concurrent writes.
385 size_t (*packet_avail_size
)(struct channel
*chan
);
386 wait_queue_head_t
*(*get_writer_buf_wait_queue
)(struct channel
*chan
, int cpu
);
387 wait_queue_head_t
*(*get_hp_wait_queue
)(struct channel
*chan
);
388 int (*is_finalized
)(struct channel
*chan
);
389 int (*is_disabled
)(struct channel
*chan
);
390 int (*timestamp_begin
) (const struct lib_ring_buffer_config
*config
,
391 struct lib_ring_buffer
*bufb
,
392 uint64_t *timestamp_begin
);
393 int (*timestamp_end
) (const struct lib_ring_buffer_config
*config
,
394 struct lib_ring_buffer
*bufb
,
395 uint64_t *timestamp_end
);
396 int (*events_discarded
) (const struct lib_ring_buffer_config
*config
,
397 struct lib_ring_buffer
*bufb
,
398 uint64_t *events_discarded
);
399 int (*content_size
) (const struct lib_ring_buffer_config
*config
,
400 struct lib_ring_buffer
*bufb
,
401 uint64_t *content_size
);
402 int (*packet_size
) (const struct lib_ring_buffer_config
*config
,
403 struct lib_ring_buffer
*bufb
,
404 uint64_t *packet_size
);
405 int (*stream_id
) (const struct lib_ring_buffer_config
*config
,
406 struct lib_ring_buffer
*bufb
,
407 uint64_t *stream_id
);
408 int (*current_timestamp
) (const struct lib_ring_buffer_config
*config
,
409 struct lib_ring_buffer
*bufb
,
411 int (*sequence_number
) (const struct lib_ring_buffer_config
*config
,
412 struct lib_ring_buffer
*bufb
,
414 int (*instance_id
) (const struct lib_ring_buffer_config
*config
,
415 struct lib_ring_buffer
*bufb
,
419 struct lttng_transport
{
421 struct module
*owner
;
422 struct list_head node
;
423 struct lttng_channel_ops ops
;
426 struct lttng_syscall_filter
;
428 #define LTTNG_EVENT_HT_BITS 12
429 #define LTTNG_EVENT_HT_SIZE (1U << LTTNG_EVENT_HT_BITS)
431 struct lttng_event_ht
{
432 struct hlist_head table
[LTTNG_EVENT_HT_SIZE
];
435 struct lttng_channel
{
437 struct channel
*chan
; /* Channel buffers */
439 struct lttng_ctx
*ctx
;
440 /* Event ID management */
441 struct lttng_session
*session
;
442 struct file
*file
; /* File associated to channel */
443 unsigned int free_event_id
; /* Next event ID to allocate */
444 struct list_head list
; /* Channel list */
445 struct lttng_channel_ops
*ops
;
446 struct lttng_transport
*transport
;
447 struct lttng_event
**sc_table
; /* for syscall tracing */
448 struct lttng_event
**compat_sc_table
;
449 struct lttng_event
**sc_exit_table
; /* for syscall exit tracing */
450 struct lttng_event
**compat_sc_exit_table
;
451 struct lttng_event
*sc_unknown
; /* for unknown syscalls */
452 struct lttng_event
*sc_compat_unknown
;
453 struct lttng_event
*sc_exit_unknown
;
454 struct lttng_event
*compat_sc_exit_unknown
;
455 struct lttng_syscall_filter
*sc_filter
;
456 int header_type
; /* 0: unset, 1: compact, 2: large */
457 enum channel_type channel_type
;
458 unsigned int metadata_dumped
:1,
459 sys_enter_registered
:1,
460 sys_exit_registered
:1,
462 tstate
:1; /* Transient enable state */
465 struct lttng_metadata_stream
{
466 void *priv
; /* Ring buffer private data */
467 struct lttng_metadata_cache
*metadata_cache
;
468 unsigned int metadata_in
; /* Bytes read from the cache */
469 unsigned int metadata_out
; /* Bytes consumed from stream */
470 int finalized
; /* Has channel been finalized */
471 wait_queue_head_t read_wait
; /* Reader buffer-level wait queue */
472 struct list_head list
; /* Stream list */
473 struct lttng_transport
*transport
;
474 uint64_t version
; /* Current version of the metadata cache */
477 #define LTTNG_DYNAMIC_LEN_STACK_SIZE 128
479 struct lttng_dynamic_len_stack
{
480 size_t stack
[LTTNG_DYNAMIC_LEN_STACK_SIZE
];
484 DECLARE_PER_CPU(struct lttng_dynamic_len_stack
, lttng_dynamic_len_stack
);
487 * struct lttng_pid_tracker declared in header due to deferencing of *v
488 * in RCU_INITIALIZER(v).
490 #define LTTNG_PID_HASH_BITS 6
491 #define LTTNG_PID_TABLE_SIZE (1 << LTTNG_PID_HASH_BITS)
493 struct lttng_pid_tracker
{
494 struct hlist_head pid_hash
[LTTNG_PID_TABLE_SIZE
];
497 struct lttng_pid_hash_node
{
498 struct hlist_node hlist
;
502 struct lttng_session
{
503 int active
; /* Is trace session active ? */
504 int been_active
; /* Has trace session been active ? */
505 struct file
*file
; /* File associated to session */
506 struct list_head chan
; /* Channel list head */
507 struct list_head events
; /* Event list head */
508 struct list_head list
; /* Session list */
509 unsigned int free_chan_id
; /* Next chan ID to allocate */
510 uuid_le uuid
; /* Trace session unique ID */
511 struct lttng_metadata_cache
*metadata_cache
;
512 struct lttng_pid_tracker
*pid_tracker
;
513 unsigned int metadata_dumped
:1,
514 tstate
:1; /* Transient enable state */
515 /* List of enablers */
516 struct list_head enablers_head
;
517 /* Hash table of events */
518 struct lttng_event_ht events_ht
;
521 struct lttng_metadata_cache
{
522 char *data
; /* Metadata cache */
523 unsigned int cache_alloc
; /* Metadata allocated size (bytes) */
524 unsigned int metadata_written
; /* Number of bytes written in metadata cache */
525 struct kref refcount
; /* Metadata cache usage */
526 struct list_head metadata_stream
; /* Metadata stream list */
527 uuid_le uuid
; /* Trace session unique ID (copy) */
528 struct mutex lock
; /* Produce/consume lock */
529 uint64_t version
; /* Current version of the metadata */
532 void lttng_lock_sessions(void);
533 void lttng_unlock_sessions(void);
535 struct list_head
*lttng_get_probe_list_head(void);
537 struct lttng_enabler
*lttng_enabler_create(enum lttng_enabler_type type
,
538 struct lttng_kernel_event
*event_param
,
539 struct lttng_channel
*chan
);
541 int lttng_enabler_enable(struct lttng_enabler
*enabler
);
542 int lttng_enabler_disable(struct lttng_enabler
*enabler
);
543 int lttng_fix_pending_events(void);
544 int lttng_session_active(void);
546 struct lttng_session
*lttng_session_create(void);
547 int lttng_session_enable(struct lttng_session
*session
);
548 int lttng_session_disable(struct lttng_session
*session
);
549 void lttng_session_destroy(struct lttng_session
*session
);
550 int lttng_session_metadata_regenerate(struct lttng_session
*session
);
551 int lttng_session_statedump(struct lttng_session
*session
);
552 void metadata_cache_destroy(struct kref
*kref
);
554 struct lttng_channel
*lttng_channel_create(struct lttng_session
*session
,
555 const char *transport_name
,
557 size_t subbuf_size
, size_t num_subbuf
,
558 unsigned int switch_timer_interval
,
559 unsigned int read_timer_interval
,
560 enum channel_type channel_type
);
561 struct lttng_channel
*lttng_global_channel_create(struct lttng_session
*session
,
562 int overwrite
, void *buf_addr
,
563 size_t subbuf_size
, size_t num_subbuf
,
564 unsigned int switch_timer_interval
,
565 unsigned int read_timer_interval
);
567 void lttng_metadata_channel_destroy(struct lttng_channel
*chan
);
568 struct lttng_event
*lttng_event_create(struct lttng_channel
*chan
,
569 struct lttng_kernel_event
*event_param
,
571 const struct lttng_event_desc
*event_desc
,
572 enum lttng_kernel_instrumentation itype
);
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_compat_old_create(struct lttng_channel
*chan
,
579 struct lttng_kernel_old_event
*old_event_param
,
581 const struct lttng_event_desc
*internal_desc
);
583 int lttng_channel_enable(struct lttng_channel
*channel
);
584 int lttng_channel_disable(struct lttng_channel
*channel
);
585 int lttng_event_enable(struct lttng_event
*event
);
586 int lttng_event_disable(struct lttng_event
*event
);
588 void lttng_transport_register(struct lttng_transport
*transport
);
589 void lttng_transport_unregister(struct lttng_transport
*transport
);
591 void synchronize_trace(void);
592 int lttng_abi_init(void);
593 int lttng_abi_compat_old_init(void);
594 void lttng_abi_exit(void);
595 void lttng_abi_compat_old_exit(void);
597 int lttng_probe_register(struct lttng_probe_desc
*desc
);
598 void lttng_probe_unregister(struct lttng_probe_desc
*desc
);
599 const struct lttng_event_desc
*lttng_event_get(const char *name
);
600 void lttng_event_put(const struct lttng_event_desc
*desc
);
601 int lttng_probes_init(void);
602 void lttng_probes_exit(void);
604 int lttng_metadata_output_channel(struct lttng_metadata_stream
*stream
,
605 struct channel
*chan
);
607 int lttng_pid_tracker_get_node_pid(const struct lttng_pid_hash_node
*node
);
608 struct lttng_pid_tracker
*lttng_pid_tracker_create(void);
609 void lttng_pid_tracker_destroy(struct lttng_pid_tracker
*lpf
);
610 bool lttng_pid_tracker_lookup(struct lttng_pid_tracker
*lpf
, int pid
);
611 int lttng_pid_tracker_add(struct lttng_pid_tracker
*lpf
, int pid
);
612 int lttng_pid_tracker_del(struct lttng_pid_tracker
*lpf
, int pid
);
614 int lttng_session_track_pid(struct lttng_session
*session
, int pid
);
615 int lttng_session_untrack_pid(struct lttng_session
*session
, int pid
);
617 int lttng_session_list_tracker_pids(struct lttng_session
*session
);
619 void lttng_clock_ref(void);
620 void lttng_clock_unref(void);
622 #if defined(CONFIG_HAVE_SYSCALL_TRACEPOINTS)
623 int lttng_syscalls_register(struct lttng_channel
*chan
, void *filter
);
624 int lttng_syscalls_unregister(struct lttng_channel
*chan
);
625 int lttng_syscall_filter_enable(struct lttng_channel
*chan
,
627 int lttng_syscall_filter_disable(struct lttng_channel
*chan
,
629 long lttng_channel_syscall_mask(struct lttng_channel
*channel
,
630 struct lttng_kernel_syscall_mask __user
*usyscall_mask
);
632 static inline int lttng_syscalls_register(struct lttng_channel
*chan
, void *filter
)
637 static inline int lttng_syscalls_unregister(struct lttng_channel
*chan
)
642 static inline int lttng_syscall_filter_enable(struct lttng_channel
*chan
,
648 static inline int lttng_syscall_filter_disable(struct lttng_channel
*chan
,
654 static inline long lttng_channel_syscall_mask(struct lttng_channel
*channel
,
655 struct lttng_kernel_syscall_mask __user
*usyscall_mask
)
661 void lttng_filter_sync_state(struct lttng_bytecode_runtime
*runtime
);
662 int lttng_enabler_attach_bytecode(struct lttng_enabler
*enabler
,
663 struct lttng_kernel_filter_bytecode __user
*bytecode
);
664 void lttng_enabler_event_link_bytecode(struct lttng_event
*event
,
665 struct lttng_enabler
*enabler
);
667 int lttng_probes_init(void);
669 extern struct lttng_ctx
*lttng_static_ctx
;
671 int lttng_context_init(void);
672 void lttng_context_exit(void);
673 struct lttng_ctx_field
*lttng_append_context(struct lttng_ctx
**ctx
);
674 void lttng_context_update(struct lttng_ctx
*ctx
);
675 int lttng_find_context(struct lttng_ctx
*ctx
, const char *name
);
676 int lttng_get_context_index(struct lttng_ctx
*ctx
, const char *name
);
677 void lttng_remove_context_field(struct lttng_ctx
**ctx
,
678 struct lttng_ctx_field
*field
);
679 void lttng_destroy_context(struct lttng_ctx
*ctx
);
680 int lttng_add_pid_to_ctx(struct lttng_ctx
**ctx
);
681 int lttng_add_cpu_id_to_ctx(struct lttng_ctx
**ctx
);
682 int lttng_add_procname_to_ctx(struct lttng_ctx
**ctx
);
683 int lttng_add_prio_to_ctx(struct lttng_ctx
**ctx
);
684 int lttng_add_nice_to_ctx(struct lttng_ctx
**ctx
);
685 int lttng_add_vpid_to_ctx(struct lttng_ctx
**ctx
);
686 int lttng_add_tid_to_ctx(struct lttng_ctx
**ctx
);
687 int lttng_add_vtid_to_ctx(struct lttng_ctx
**ctx
);
688 int lttng_add_ppid_to_ctx(struct lttng_ctx
**ctx
);
689 int lttng_add_vppid_to_ctx(struct lttng_ctx
**ctx
);
690 int lttng_add_hostname_to_ctx(struct lttng_ctx
**ctx
);
691 int lttng_add_interruptible_to_ctx(struct lttng_ctx
**ctx
);
692 int lttng_add_need_reschedule_to_ctx(struct lttng_ctx
**ctx
);
693 #if defined(CONFIG_PREEMPT_RT_FULL) || defined(CONFIG_PREEMPT)
694 int lttng_add_preemptible_to_ctx(struct lttng_ctx
**ctx
);
697 int lttng_add_preemptible_to_ctx(struct lttng_ctx
**ctx
)
702 #ifdef CONFIG_PREEMPT_RT_FULL
703 int lttng_add_migratable_to_ctx(struct lttng_ctx
**ctx
);
706 int lttng_add_migratable_to_ctx(struct lttng_ctx
**ctx
)
711 #if defined(CONFIG_PERF_EVENTS) && (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,33))
712 int lttng_add_perf_counter_to_ctx(uint32_t type
,
715 struct lttng_ctx
**ctx
);
716 int lttng_cpuhp_perf_counter_online(unsigned int cpu
,
717 struct lttng_cpuhp_node
*node
);
718 int lttng_cpuhp_perf_counter_dead(unsigned int cpu
,
719 struct lttng_cpuhp_node
*node
);
722 int lttng_add_perf_counter_to_ctx(uint32_t type
,
725 struct lttng_ctx
**ctx
)
730 int lttng_cpuhp_perf_counter_online(unsigned int cpu
,
731 struct lttng_cpuhp_node
*node
)
736 int lttng_cpuhp_perf_counter_dead(unsigned int cpu
,
737 struct lttng_cpuhp_node
*node
)
743 int lttng_logger_init(void);
744 void lttng_logger_exit(void);
746 extern int lttng_statedump_start(struct lttng_session
*session
);
748 #ifdef CONFIG_KPROBES
749 int lttng_kprobes_register(const char *name
,
750 const char *symbol_name
,
753 struct lttng_event
*event
);
754 void lttng_kprobes_unregister(struct lttng_event
*event
);
755 void lttng_kprobes_destroy_private(struct lttng_event
*event
);
758 int lttng_kprobes_register(const char *name
,
759 const char *symbol_name
,
762 struct lttng_event
*event
)
768 void lttng_kprobes_unregister(struct lttng_event
*event
)
773 void lttng_kprobes_destroy_private(struct lttng_event
*event
)
778 #ifdef CONFIG_KRETPROBES
779 int lttng_kretprobes_register(const char *name
,
780 const char *symbol_name
,
783 struct lttng_event
*event_entry
,
784 struct lttng_event
*event_exit
);
785 void lttng_kretprobes_unregister(struct lttng_event
*event
);
786 void lttng_kretprobes_destroy_private(struct lttng_event
*event
);
787 int lttng_kretprobes_event_enable_state(struct lttng_event
*event
,
791 int lttng_kretprobes_register(const char *name
,
792 const char *symbol_name
,
795 struct lttng_event
*event_entry
,
796 struct lttng_event
*event_exit
)
802 void lttng_kretprobes_unregister(struct lttng_event
*event
)
807 void lttng_kretprobes_destroy_private(struct lttng_event
*event
)
812 int lttng_kretprobes_event_enable_state(struct lttng_event
*event
,
819 #if defined(CONFIG_DYNAMIC_FTRACE) && !defined(LTTNG_FTRACE_MISSING_HEADER)
820 int lttng_ftrace_register(const char *name
,
821 const char *symbol_name
,
822 struct lttng_event
*event
);
823 void lttng_ftrace_unregister(struct lttng_event
*event
);
824 void lttng_ftrace_destroy_private(struct lttng_event
*event
);
827 int lttng_ftrace_register(const char *name
,
828 const char *symbol_name
,
829 struct lttng_event
*event
)
835 void lttng_ftrace_unregister(struct lttng_event
*event
)
840 void lttng_ftrace_destroy_private(struct lttng_event
*event
)
845 int lttng_calibrate(struct lttng_kernel_calibrate
*calibrate
);
847 extern const struct file_operations lttng_tracepoint_list_fops
;
848 extern const struct file_operations lttng_syscall_list_fops
;
850 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
851 #define TRACEPOINT_HAS_DATA_ARG
854 #endif /* _LTTNG_EVENTS_H */