[deliverable/lttng-ust.git] / liblttng-ust / ust-events-internal.h

#ifndef _LTTNG_UST_EVENTS_INTERNAL_H
#define _LTTNG_UST_EVENTS_INTERNAL_H

/*
 * ust-events-internal.h
 *
 * Copyright 2019 (c) - Francis Deslauriers <francis.deslauriers@efficios.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include <stdint.h>

#include <urcu/list.h>
#include <urcu/hlist.h>

#include <helper.h>
#include <lttng/ust-events.h>

struct lttng_event_enabler {
	struct lttng_enabler base;
	struct cds_list_head node;	/* per-session list of enablers */
	struct lttng_channel *chan;
	/*
	 * Unused, but kept around to make it explicit that the tracer can do
	 * it.
	 */
	struct lttng_ctx *ctx;
};

struct lttng_ust_filter_bytecode_node {
	struct cds_list_head node;
	struct lttng_enabler *enabler;
	/*
	 * struct lttng_ust_filter_bytecode has var. sized array, must
	 * be last field.
	 */
	struct lttng_ust_filter_bytecode bc;
};

struct lttng_ust_excluder_node {
	struct cds_list_head node;
	struct lttng_enabler *enabler;
	/*
	 * struct lttng_ust_event_exclusion had variable sized array,
	 * must be last field.
	 */
	struct lttng_ust_event_exclusion excluder;
};

static inline
struct lttng_enabler *lttng_event_enabler_as_enabler(
		struct lttng_event_enabler *event_enabler)
{
	return &event_enabler->base;
}


/*
 * Allocate and initialize a `struct lttng_event_enabler` object.
 *
 * On success, returns a `struct lttng_event_enabler`,
 * On memory error, returns NULL.
 */
LTTNG_HIDDEN
struct lttng_event_enabler *lttng_event_enabler_create(
		enum lttng_enabler_format_type format_type,
		struct lttng_ust_event *event_param,
		struct lttng_channel *chan);

/*
 * Destroy a `struct lttng_event_enabler` object.
 */
LTTNG_HIDDEN
void lttng_event_enabler_destroy(struct lttng_event_enabler *enabler);

/*
 * Enable a `struct lttng_event_enabler` object and all events related to this
 * enabler.
 */
LTTNG_HIDDEN
int lttng_event_enabler_enable(struct lttng_event_enabler *enabler);

/*
 * Disable a `struct lttng_event_enabler` object and all events related to this
 * enabler.
 */
LTTNG_HIDDEN
int lttng_event_enabler_disable(struct lttng_event_enabler *enabler);

/*
 * Attach filter bytecode program to `struct lttng_event_enabler` and all
 * events related to this enabler.
 */
LTTNG_HIDDEN
int lttng_event_enabler_attach_bytecode(struct lttng_event_enabler *enabler,
		struct lttng_ust_filter_bytecode_node *bytecode);

/*
 * Attach an application context to an event enabler.
 *
 * Not implemented.
 */
LTTNG_HIDDEN
int lttng_event_enabler_attach_context(struct lttng_event_enabler *enabler,
		struct lttng_ust_context *ctx);

/*
 * Attach exclusion list to `struct lttng_event_enabler` and all
 * events related to this enabler.
 */
LTTNG_HIDDEN
int lttng_event_enabler_attach_exclusion(struct lttng_event_enabler *enabler,
		struct lttng_ust_excluder_node *excluder);

/*
 * Synchronize bytecodes for the enabler and the event.
 *
 * This function goes over all bytecode programs of the event enabler to ensure
 * each is linked to the provided event.
 */
LTTNG_HIDDEN
void lttng_enabler_link_bytecode(const struct lttng_event_desc *event_desc,
		struct lttng_ctx **ctx,
		struct cds_list_head *bytecode_runtime_head,
		struct lttng_enabler *enabler);

#endif /* _LTTNG_UST_EVENTS_INTERNAL_H */
Commit	Line	Data
d871c65b FD	1	#ifndef _LTTNG_UST_EVENTS_INTERNAL_H
	2	#define _LTTNG_UST_EVENTS_INTERNAL_H
	3
	4	/*
	5	* ust-events-internal.h
	6	*
	7	* Copyright 2019 (c) - Francis Deslauriers <francis.deslauriers@efficios.com>
	8	*
	9	* Permission is hereby granted, free of charge, to any person obtaining a copy
	10	* of this software and associated documentation files (the "Software"), to deal
	11	* in the Software without restriction, including without limitation the rights
	12	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	13	* copies of the Software, and to permit persons to whom the Software is
	14	* furnished to do so, subject to the following conditions:
	15	*
	16	* The above copyright notice and this permission notice shall be included in
	17	* all copies or substantial portions of the Software.
	18	*
	19	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	20	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	21	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
	22	* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	23	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	24	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
	25	* SOFTWARE.
	26	*/
	27
	28	#include <stdint.h>
	29
	30	#include <urcu/list.h>
	31	#include <urcu/hlist.h>
	32
	33	#include <helper.h>
	34	#include <lttng/ust-events.h>
	35
	36	struct lttng_event_enabler {
	37	struct lttng_enabler base;
	38	struct cds_list_head node; /* per-session list of enablers */
	39	struct lttng_channel *chan;
	40	/*
	41	* Unused, but kept around to make it explicit that the tracer can do
	42	* it.
	43	*/
	44	struct lttng_ctx *ctx;
	45	};
	46
92495593 FD	47	struct lttng_ust_filter_bytecode_node {
	48	struct cds_list_head node;
	49	struct lttng_enabler *enabler;
	50	/*
	51	* struct lttng_ust_filter_bytecode has var. sized array, must
	52	* be last field.
	53	*/
	54	struct lttng_ust_filter_bytecode bc;
	55	};
	56
	57	struct lttng_ust_excluder_node {
	58	struct cds_list_head node;
	59	struct lttng_enabler *enabler;
	60	/*
	61	* struct lttng_ust_event_exclusion had variable sized array,
	62	* must be last field.
	63	*/
	64	struct lttng_ust_event_exclusion excluder;
	65	};
	66
d871c65b FD	67	static inline
	68	struct lttng_enabler *lttng_event_enabler_as_enabler(
	69	struct lttng_event_enabler *event_enabler)
	70	{
	71	return &event_enabler->base;
	72	}
	73
	74
	75	/*
	76	* Allocate and initialize a `struct lttng_event_enabler` object.
	77	*
	78	* On success, returns a `struct lttng_event_enabler`,
	79	* On memory error, returns NULL.
	80	*/
	81	LTTNG_HIDDEN
	82	struct lttng_event_enabler *lttng_event_enabler_create(
	83	enum lttng_enabler_format_type format_type,
	84	struct lttng_ust_event *event_param,
	85	struct lttng_channel *chan);
	86
	87	/*
	88	* Destroy a `struct lttng_event_enabler` object.
	89	*/
	90	LTTNG_HIDDEN
	91	void lttng_event_enabler_destroy(struct lttng_event_enabler *enabler);
	92
	93	/*
	94	* Enable a `struct lttng_event_enabler` object and all events related to this
	95	* enabler.
	96	*/
	97	LTTNG_HIDDEN
	98	int lttng_event_enabler_enable(struct lttng_event_enabler *enabler);
	99
	100	/*
	101	* Disable a `struct lttng_event_enabler` object and all events related to this
	102	* enabler.
	103	*/
	104	LTTNG_HIDDEN
	105	int lttng_event_enabler_disable(struct lttng_event_enabler *enabler);
	106
	107	/*
	108	* Attach filter bytecode program to `struct lttng_event_enabler` and all
	109	* events related to this enabler.
	110	*/
	111	LTTNG_HIDDEN
	112	int lttng_event_enabler_attach_bytecode(struct lttng_event_enabler *enabler,
	113	struct lttng_ust_filter_bytecode_node *bytecode);
	114
	115	/*
	116	* Attach an application context to an event enabler.
	117	*
	118	* Not implemented.
	119	*/
	120	LTTNG_HIDDEN
	121	int lttng_event_enabler_attach_context(struct lttng_event_enabler *enabler,
	122	struct lttng_ust_context *ctx);
	123
	124	/*
	125	* Attach exclusion list to `struct lttng_event_enabler` and all
	126	* events related to this enabler.
	127	*/
	128	LTTNG_HIDDEN
	129	int lttng_event_enabler_attach_exclusion(struct lttng_event_enabler *enabler,
	130	struct lttng_ust_excluder_node *excluder);
131
132	/*
133	* Synchronize bytecodes for the enabler and the event.
134	*
135	* This function goes over all bytecode programs of the event enabler to ensure
136	* each is linked to the provided event.
137	*/
138	LTTNG_HIDDEN
53b9d7db FD	139	void lttng_enabler_link_bytecode(const struct lttng_event_desc *event_desc,
	140	struct lttng_ctx **ctx,
	141	struct cds_list_head *bytecode_runtime_head,
	142	struct lttng_enabler *enabler);
d871c65b FD	143
d871c65b FD	144	#endif /* _LTTNG_UST_EVENTS_INTERNAL_H */