[lttng-ust.git] / liblttng-ust / lttng-tracer-core.h

/*
 * SPDX-License-Identifier: LGPL-2.1-only
 *
 * Copyright (C) 2005-2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 *
 * This contains the core definitions for the Linux Trace Toolkit.
 */

#ifndef _LTTNG_TRACER_CORE_H
#define _LTTNG_TRACER_CORE_H

#include <stddef.h>
#include <urcu/arch.h>
#include <urcu/list.h>
#include <lttng/ust-tracer.h>
#include <lttng/bug.h>
#include <lttng/ringbuffer-config.h>
#include <usterr-signal-safe.h>
#include <helper.h>

/*
 * The longuest possible namespace proc path is with the cgroup ns
 * and the maximum theoretical linux pid of 536870912 :
 *
 *  /proc/self/task/536870912/ns/cgroup
 */
#define LTTNG_PROC_NS_PATH_MAX 40

struct lttng_session;
struct lttng_channel;
struct lttng_event;
struct lttng_ctx_field;
struct lttng_ust_lib_ring_buffer_ctx;
struct lttng_ctx_value;
struct lttng_event_notifier;

int ust_lock(void) __attribute__ ((warn_unused_result));
void ust_lock_nocheck(void);
void ust_unlock(void);

void lttng_fixup_event_tls(void);
void lttng_fixup_vtid_tls(void);
void lttng_fixup_procname_tls(void);
void lttng_fixup_cgroup_ns_tls(void);
void lttng_fixup_ipc_ns_tls(void);
void lttng_fixup_net_ns_tls(void);
LTTNG_HIDDEN
void lttng_fixup_time_ns_tls(void);
void lttng_fixup_uts_ns_tls(void);

const char *lttng_ust_obj_get_name(int id);

int lttng_get_notify_socket(void *owner);

LTTNG_HIDDEN
char* lttng_ust_sockinfo_get_procname(void *owner);

void lttng_ust_sockinfo_session_enabled(void *owner);

void lttng_ust_malloc_wrapper_init(void);

ssize_t lttng_ust_read(int fd, void *buf, size_t len);

size_t lttng_ust_dummy_get_size(struct lttng_ctx_field *field, size_t offset);
void lttng_ust_dummy_record(struct lttng_ctx_field *field,
		 struct lttng_ust_lib_ring_buffer_ctx *ctx,
		 struct lttng_channel *chan);
void lttng_ust_dummy_get_value(struct lttng_ctx_field *field,
		struct lttng_ctx_value *value);
int lttng_context_is_app(const char *name);
void lttng_ust_fixup_tls(void);

extern void (*lttng_ust_liburcu_bp_before_fork)(void);
extern void (*lttng_ust_liburcu_bp_after_fork_parent)(void);
extern void (*lttng_ust_liburcu_bp_after_fork_child)(void);

LTTNG_HIDDEN
void lttng_event_notifier_notification_send(
		struct lttng_event_notifier *event_notifier,
		const char *stack_data);

LTTNG_HIDDEN
struct lttng_counter_transport *lttng_counter_transport_find(const char *name);
LTTNG_HIDDEN
void lttng_counter_transport_register(struct lttng_counter_transport *transport);
LTTNG_HIDDEN
void lttng_counter_transport_unregister(struct lttng_counter_transport *transport);

#ifdef LTTNG_UST_HAVE_PERF_EVENT
void lttng_ust_fixup_perf_counter_tls(void);
void lttng_perf_lock(void);
void lttng_perf_unlock(void);
#else /* #ifdef LTTNG_UST_HAVE_PERF_EVENT */
static inline
void lttng_ust_fixup_perf_counter_tls(void)
{
}
static inline
void lttng_perf_lock(void)
{
}
static inline
void lttng_perf_unlock(void)
{
}
#endif /* #else #ifdef LTTNG_UST_HAVE_PERF_EVENT */

#endif /* _LTTNG_TRACER_CORE_H */
Commit	Line	Data
	1	/*
	2	* SPDX-License-Identifier: LGPL-2.1-only
	3	*
	4	* Copyright (C) 2005-2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	5	*
	6	* This contains the core definitions for the Linux Trace Toolkit.
	7	*/
	8
	9	#ifndef _LTTNG_TRACER_CORE_H
	10	#define _LTTNG_TRACER_CORE_H
	11
	12	#include <stddef.h>
	13	#include <urcu/arch.h>
	14	#include <urcu/list.h>
	15	#include <lttng/ust-tracer.h>
	16	#include <lttng/bug.h>
	17	#include <lttng/ringbuffer-config.h>
	18	#include <usterr-signal-safe.h>
	19	#include <helper.h>
	20
	21	/*
	22	* The longuest possible namespace proc path is with the cgroup ns
	23	* and the maximum theoretical linux pid of 536870912 :
	24	*
	25	* /proc/self/task/536870912/ns/cgroup
	26	*/
	27	#define LTTNG_PROC_NS_PATH_MAX 40
	28
	29	struct lttng_session;
	30	struct lttng_channel;
	31	struct lttng_event;
	32	struct lttng_ctx_field;
	33	struct lttng_ust_lib_ring_buffer_ctx;
	34	struct lttng_ctx_value;
	35	struct lttng_event_notifier;
	36
	37	int ust_lock(void) __attribute__ ((warn_unused_result));
	38	void ust_lock_nocheck(void);
	39	void ust_unlock(void);
	40
	41	void lttng_fixup_event_tls(void);
	42	void lttng_fixup_vtid_tls(void);
	43	void lttng_fixup_procname_tls(void);
	44	void lttng_fixup_cgroup_ns_tls(void);
	45	void lttng_fixup_ipc_ns_tls(void);
	46	void lttng_fixup_net_ns_tls(void);
	47	LTTNG_HIDDEN
	48	void lttng_fixup_time_ns_tls(void);
	49	void lttng_fixup_uts_ns_tls(void);
	50
	51	const char *lttng_ust_obj_get_name(int id);
	52
	53	int lttng_get_notify_socket(void *owner);
	54
	55	LTTNG_HIDDEN
	56	char* lttng_ust_sockinfo_get_procname(void *owner);
	57
	58	void lttng_ust_sockinfo_session_enabled(void *owner);
	59
	60	void lttng_ust_malloc_wrapper_init(void);
	61
	62	ssize_t lttng_ust_read(int fd, void *buf, size_t len);
	63
	64	size_t lttng_ust_dummy_get_size(struct lttng_ctx_field *field, size_t offset);
	65	void lttng_ust_dummy_record(struct lttng_ctx_field *field,
	66	struct lttng_ust_lib_ring_buffer_ctx *ctx,
	67	struct lttng_channel *chan);
	68	void lttng_ust_dummy_get_value(struct lttng_ctx_field *field,
	69	struct lttng_ctx_value *value);
	70	int lttng_context_is_app(const char *name);
	71	void lttng_ust_fixup_tls(void);
	72
	73	extern void (*lttng_ust_liburcu_bp_before_fork)(void);
	74	extern void (*lttng_ust_liburcu_bp_after_fork_parent)(void);
	75	extern void (*lttng_ust_liburcu_bp_after_fork_child)(void);
	76
	77	LTTNG_HIDDEN
	78	void lttng_event_notifier_notification_send(
	79	struct lttng_event_notifier *event_notifier,
	80	const char *stack_data);
	81
	82	LTTNG_HIDDEN
	83	struct lttng_counter_transport lttng_counter_transport_find(const char name);
	84	LTTNG_HIDDEN
	85	void lttng_counter_transport_register(struct lttng_counter_transport *transport);
	86	LTTNG_HIDDEN
	87	void lttng_counter_transport_unregister(struct lttng_counter_transport *transport);
	88
	89	#ifdef LTTNG_UST_HAVE_PERF_EVENT
	90	void lttng_ust_fixup_perf_counter_tls(void);
	91	void lttng_perf_lock(void);
	92	void lttng_perf_unlock(void);
	93	#else /* #ifdef LTTNG_UST_HAVE_PERF_EVENT */
	94	static inline
	95	void lttng_ust_fixup_perf_counter_tls(void)
	96	{
	97	}
	98	static inline
	99	void lttng_perf_lock(void)
	100	{
	101	}
	102	static inline
	103	void lttng_perf_unlock(void)
	104	{
	105	}
	106	#endif /* #else #ifdef LTTNG_UST_HAVE_PERF_EVENT */
	107
	108	#endif /* _LTTNG_TRACER_CORE_H */