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

#ifndef _LTTNG_TRACER_CORE_H
#define _LTTNG_TRACER_CORE_H

/*
 * Copyright (C) 2005-2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 *
 * This contains the core definitions for the Linux Trace Toolkit.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; version 2.1 of
 * the License.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
 */

#include <stdint.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;

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);
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);

#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	#ifndef _LTTNG_TRACER_CORE_H
	2	#define _LTTNG_TRACER_CORE_H
	3
	4	/*
	5	* Copyright (C) 2005-2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	6	*
	7	* This contains the core definitions for the Linux Trace Toolkit.
	8	*
	9	* This library is free software; you can redistribute it and/or
	10	* modify it under the terms of the GNU Lesser General Public
	11	* License as published by the Free Software Foundation; version 2.1 of
	12	* the License.
	13	*
	14	* This library is distributed in the hope that it will be useful,
	15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	17	* Lesser General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU Lesser General Public
	20	* License along with this library; if not, write to the Free Software
	21	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	22	*/
	23
	24	#include <stdint.h>
	25	#include <stddef.h>
	26	#include <urcu/arch.h>
	27	#include <urcu/list.h>
	28	#include <lttng/ust-tracer.h>
	29	#include <lttng/bug.h>
	30	#include <lttng/ringbuffer-config.h>
	31	#include <usterr-signal-safe.h>
	32	#include <helper.h>
	33
	34	/*
	35	* The longuest possible namespace proc path is with the cgroup ns
	36	* and the maximum theoretical linux pid of 536870912 :
	37	*
	38	* /proc/self/task/536870912/ns/cgroup
	39	*/
	40	#define LTTNG_PROC_NS_PATH_MAX 40
	41
	42	struct lttng_session;
	43	struct lttng_channel;
	44	struct lttng_event;
	45	struct lttng_ctx_field;
	46	struct lttng_ust_lib_ring_buffer_ctx;
	47	struct lttng_ctx_value;
	48
	49	int ust_lock(void) __attribute__ ((warn_unused_result));
	50	void ust_lock_nocheck(void);
	51	void ust_unlock(void);
	52
	53	void lttng_fixup_event_tls(void);
	54	void lttng_fixup_vtid_tls(void);
	55	void lttng_fixup_procname_tls(void);
	56	void lttng_fixup_cgroup_ns_tls(void);
	57	void lttng_fixup_ipc_ns_tls(void);
	58	void lttng_fixup_net_ns_tls(void);
	59	void lttng_fixup_uts_ns_tls(void);
	60
	61	const char *lttng_ust_obj_get_name(int id);
	62
	63	int lttng_get_notify_socket(void *owner);
	64
	65	LTTNG_HIDDEN
	66	char* lttng_ust_sockinfo_get_procname(void *owner);
	67
	68	void lttng_ust_sockinfo_session_enabled(void *owner);
	69
	70	void lttng_ust_malloc_wrapper_init(void);
	71
	72	ssize_t lttng_ust_read(int fd, void *buf, size_t len);
	73
	74	size_t lttng_ust_dummy_get_size(struct lttng_ctx_field *field, size_t offset);
	75	void lttng_ust_dummy_record(struct lttng_ctx_field *field,
	76	struct lttng_ust_lib_ring_buffer_ctx *ctx,
	77	struct lttng_channel *chan);
	78	void lttng_ust_dummy_get_value(struct lttng_ctx_field *field,
	79	struct lttng_ctx_value *value);
	80	int lttng_context_is_app(const char *name);
	81	void lttng_ust_fixup_tls(void);
	82
	83	#ifdef LTTNG_UST_HAVE_PERF_EVENT
	84	void lttng_ust_fixup_perf_counter_tls(void);
	85	void lttng_perf_lock(void);
	86	void lttng_perf_unlock(void);
	87	#else /* #ifdef LTTNG_UST_HAVE_PERF_EVENT */
	88	static inline
	89	void lttng_ust_fixup_perf_counter_tls(void)
	90	{
	91	}
	92	static inline
	93	void lttng_perf_lock(void)
	94	{
	95	}
	96	static inline
	97	void lttng_perf_unlock(void)
	98	{
	99	}
	100	#endif /* #else #ifdef LTTNG_UST_HAVE_PERF_EVENT */
	101
	102	#endif /* _LTTNG_TRACER_CORE_H */