[lttng-ust.git] / include / ust / ust_trace.h

/*
 * Copyright (C) 2009     Steven Rostedt <srostedt@redhat.com>
 * Copyright (C) 2010     Nils Carlson <nils.carlson@ericsson.com>
 *
 * 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
 *
 */

/*
 * This whole file is currently a dummy, mapping a TRACE_EVENT
 * to a printf
 */

#include <stdio.h>

/*
 * Stage 1. Create a struct and a printf calling function
 * that is connected to the tracepoint at load time.
 */
#undef TRACE_EVENT
#define TRACE_EVENT(name, proto, args, tstruct, assign, print)		\
	DECLARE_TRACE_EVENT_CLASS(name,					\
				  PARAMS(proto),			\
				  PARAMS(args),				\
				  PARAMS(tstruct),			\
				  PARAMS(assign),			\
				  PARAMS(print));			\
	DEFINE_TRACE_EVENT(name, name, PARAMS(proto), PARAMS(args));

#undef __field
#define __field(type, item)		type	item;

#undef TP_STRUCT__entry
#define TP_STRUCT__entry(args...) args

#undef TP_printf
#define TP_printf(fmt, args...) fmt "\n", args

#undef TP_fast_assign
#define TP_fast_assign(args...) args

#undef DEFINE_TRACE_EVENT
#define DEFINE_TRACE_EVENT(template, name, proto, args)


#undef DECLARE_TRACE_EVENT_CLASS
#define DECLARE_TRACE_EVENT_CLASS(name, proto, args, tstruct, assign, print)	\
	struct trace_raw_##name {					\
		tstruct							\
	};								\
	static void trace_printf_##name(void *dummy, proto)		\
	{								\
		struct trace_raw_##name entry_struct, *__entry;		\
		__entry = &entry_struct;				\
		{ assign };					\
									\
		printf(print);						\
	}								\
	static inline int register_event_##name(void *data)		\
	{								\
		return register_trace_##name(trace_printf_##name, data); \
	}								\
	static inline int unregister_event_##name(void *data)		\
	{								\
		return unregister_trace_##name(trace_printf_##name, data); \
	}								\
	struct trace_event __event_##name				\
	__attribute__((section("__trace_events"), aligned(32)))	= {	\
		__tpstrtab_##name,					\
		register_event_##name,					\
		unregister_event_##name					\
	};								\
	static void __attribute__((constructor)) init_##name()		\
	{								\
		void *dummy = NULL;					\
		register_trace_##name(trace_printf_##name, dummy);	\
	}


#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
Commit	Line	Data
22d72948 NC	1	/*
	2	* Copyright (C) 2009 Steven Rostedt <srostedt@redhat.com>
	3	* Copyright (C) 2010 Nils Carlson <nils.carlson@ericsson.com>
	4	*
	5	* This library is free software; you can redistribute it and/or
	6	* modify it under the terms of the GNU Lesser General Public
	7	* License as published by the Free Software Foundation; either
	8	* version 2.1 of the License, or (at your option) any later version.
	9	*
	10	* This library is distributed in the hope that it will be useful,
	11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	13	* Lesser General Public License for more details.
	14	*
	15	* You should have received a copy of the GNU Lesser General Public
	16	* License along with this library; if not, write to the Free Software
	17	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	18	*
	19	*/
	20
	21	/*
	22	* This whole file is currently a dummy, mapping a TRACE_EVENT
	23	* to a printf
	24	*/
	25
0c0686ee NC	26	#include <stdio.h>
0c0686ee NC	27
22d72948 NC	28	/*
	29	* Stage 1. Create a struct and a printf calling function
	30	* that is connected to the tracepoint at load time.
	31	*/
	32	#undef TRACE_EVENT
	33	#define TRACE_EVENT(name, proto, args, tstruct, assign, print) \
	34	DECLARE_TRACE_EVENT_CLASS(name, \
	35	PARAMS(proto), \
	36	PARAMS(args), \
	37	PARAMS(tstruct), \
	38	PARAMS(assign), \
	39	PARAMS(print)); \
	40	DEFINE_TRACE_EVENT(name, name, PARAMS(proto), PARAMS(args));
	41
	42	#undef __field
	43	#define __field(type, item) type item;
	44
	45	#undef TP_STRUCT__entry
	46	#define TP_STRUCT__entry(args...) args
	47
	48	#undef TP_printf
	49	#define TP_printf(fmt, args...) fmt "\n", args
	50
	51	#undef TP_fast_assign
	52	#define TP_fast_assign(args...) args
	53
	54	#undef DEFINE_TRACE_EVENT
	55	#define DEFINE_TRACE_EVENT(template, name, proto, args)
	56
	57
	58	#undef DECLARE_TRACE_EVENT_CLASS
	59	#define DECLARE_TRACE_EVENT_CLASS(name, proto, args, tstruct, assign, print) \
	60	struct trace_raw_##name { \
	61	tstruct \
	62	}; \
9dec086e	63	static void trace_printf_##name(void *dummy, proto) \
22d72948 NC	64	{ \
	65	struct trace_raw_##name entry_struct, *__entry; \
	66	__entry = &entry_struct; \
	67	{ assign }; \
	68	\
	69	printf(print); \
	70	} \
0c0686ee NC	71	static inline int register_event_##name(void *data) \
	72	{ \
	73	return register_trace_##name(trace_printf_##name, data); \
	74	} \
	75	static inline int unregister_event_##name(void *data) \
	76	{ \
	77	return unregister_trace_##name(trace_printf_##name, data); \
	78	} \
	79	struct trace_event __event_##name \
	80	__attribute__((section("__trace_events"), aligned(32))) = { \
	81	__tpstrtab_##name, \
	82	register_event_##name, \
	83	unregister_event_##name \
	84	}; \
22d72948 NC	85	static void __attribute__((constructor)) init_##name() \
22d72948 NC	86	{ \
fbae86d6	87	void *dummy = NULL; \
9dec086e	88	register_trace_##name(trace_printf_##name, dummy); \
22d72948 NC	89	}
	90
	91
	92	#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)