[ust.git] / libust / tracercore.h

/*
 * Copyright (C) 2005,2006 Mathieu Desnoyers (mathieu.desnoyers@polymtl.ca)
 *
 * 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; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * 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
 */

#ifndef UST_TRACERCORE_H
#define UST_TRACERCORE_H

#include <ust/kcompat/kcompat.h>
#include <ust/core.h>
#include <urcu/list.h>

/*
 * All modifications of ltt_traces must be done by ltt-tracer.c, while holding
 * the semaphore. Only reading of this information can be done elsewhere, with
 * the RCU mechanism : the preemption must be disabled while reading the
 * list.
 */
struct ltt_traces {
	struct cds_list_head setup_head;	/* Pre-allocated traces list */
	struct cds_list_head head;		/* Allocated Traces list */
	unsigned int num_active_traces;	/* Number of active traces */
} ____cacheline_aligned;

extern struct ltt_traces ltt_traces;

/* Keep track of trap nesting inside LTT */
extern __thread int ltt_nesting;

typedef int (*ltt_run_filter_functor)(void *trace, uint16_t eID);
//typedef int (*ltt_run_filter_functor)(void *, __u16);

extern ltt_run_filter_functor ltt_run_filter;

extern void ltt_filter_register(ltt_run_filter_functor func);
extern void ltt_filter_unregister(void);

#endif /* UST_TRACERCORE_H */
Commit	Line	Data
	1	/*
	2	* Copyright (C) 2005,2006 Mathieu Desnoyers (mathieu.desnoyers@polymtl.ca)
	3	*
	4	* This contains the core definitions for the Linux Trace Toolkit.
	5	*
	6	* This library is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU Lesser General Public
	8	* License as published by the Free Software Foundation; either
	9	* version 2.1 of the License, or (at your option) any later version.
	10	*
	11	* This library is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	* Lesser General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU Lesser General Public
	17	* License along with this library; if not, write to the Free Software
	18	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	19	*/
	20
	21	#ifndef UST_TRACERCORE_H
	22	#define UST_TRACERCORE_H
	23
	24	#include <ust/kcompat/kcompat.h>
	25	#include <ust/core.h>
	26	#include <urcu/list.h>
	27
	28	/*
	29	* All modifications of ltt_traces must be done by ltt-tracer.c, while holding
	30	* the semaphore. Only reading of this information can be done elsewhere, with
	31	* the RCU mechanism : the preemption must be disabled while reading the
	32	* list.
	33	*/
	34	struct ltt_traces {
	35	struct cds_list_head setup_head; /* Pre-allocated traces list */
	36	struct cds_list_head head; /* Allocated Traces list */
	37	unsigned int num_active_traces; /* Number of active traces */
	38	} ____cacheline_aligned;
	39
	40	extern struct ltt_traces ltt_traces;
	41
	42	/* Keep track of trap nesting inside LTT */
	43	extern __thread int ltt_nesting;
	44
	45	typedef int (ltt_run_filter_functor)(void trace, uint16_t eID);
	46	//typedef int (ltt_run_filter_functor)(void , __u16);
	47
	48	extern ltt_run_filter_functor ltt_run_filter;
	49
	50	extern void ltt_filter_register(ltt_run_filter_functor func);
	51	extern void ltt_filter_unregister(void);
	52
	53	#endif /* UST_TRACERCORE_H */