[lttng-ust.git] / include / lttng / ust-tracepoint-event.h

/*
 * Copyright (c) 2011 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 *
 * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
 * OR IMPLIED.  ANY USE IS AT YOUR OWN RISK.
 *
 * Permission is hereby granted to use or copy this program
 * for any purpose,  provided the above notices are retained on all copies.
 * Permission to modify the code and to distribute modified code is granted,
 * provided the above notices are retained, and a notice that the code was
 * modified is included with the above copyright notice.
 */

#include <stdio.h>
#include <urcu/compiler.h>
#include <lttng/ust-events.h>
#include <lttng/ringbuffer-config.h>
#include <string.h>

/*
 * Macro declarations used for all stages.
 */

#undef ctf_integer
#define ctf_integer(_type, _item, _src)				\
	ctf_integer_ext(_type, _item, _src, BYTE_ORDER, 10)

#undef ctf_integer_hex
#define ctf_integer_hex(_type, _item, _src)			\
	ctf_integer_ext(_type, _item, _src, BYTE_ORDER, 16)

#undef ctf_integer_network
#define ctf_integer_network(_type, _item, _src)			\
	ctf_integer_ext(_type, _item, _src, BIG_ENDIAN, 10)

#undef ctf_integer_network_hex
#define ctf_integer_network_hex(_type, _item, _src)		\
	ctf_integer_ext(_type, _item, _src, BIG_ENDIAN, 16)

/* ctf_float is redefined at each step */

#undef ctf_array
#define ctf_array(_type, _item, _src, _length)			\
	ctf_array_encoded(_type, _item, _src, _length, none)

#undef ctf_array_text
#define ctf_array_text(_type, _item, _src, _length)		\
	ctf_array_encoded(_type, _item, _src, _length, UTF8)

#undef ctf_sequence
#define ctf_sequence(_type, _item, _src, _length_type, _src_length)	\
	ctf_sequence_encoded(_type, _item, _src,			\
			_length_type, _src_length, none)

#undef ctf_sequence_text
#define ctf_sequence_text(_type, _item, _src, _length_type, _src_length) \
	ctf_sequence_encoded(_type, _item, _src,			 \
			_length_type, _src_length, UTF8)

/* ctf_string is redefined at each step */

/*
 * TRACEPOINT_EVENT_CLASS declares a class of tracepoints receiving the
 * same arguments and having the same field layout.
 *
 * TRACEPOINT_EVENT_INSTANCE declares an instance of a tracepoint, with
 * its own provider and name. It refers to a class (template).
 *
 * TRACEPOINT_EVENT declared both a class and an instance and does a
 * direct mapping from the instance to the class.
 */

#undef TRACEPOINT_EVENT
#define TRACEPOINT_EVENT(_provider, _name, _args, _fields)	\
	TRACEPOINT_EVENT_CLASS(_provider, _name,		\
			 _TP_PARAMS(_args),			\
			 _TP_PARAMS(_fields))			\
	TRACEPOINT_EVENT_INSTANCE(_provider, _name, _name,	\
			 _TP_PARAMS(args))

/* Helpers */
#define _TP_ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))

#define _tp_max_t(type, x, y)				\
	({						\
		type __max1 = (x);              	\
		type __max2 = (y);              	\
		__max1 > __max2 ? __max1: __max2;	\
	})

/*
 * Stage 0 of tracepoint event generation.
 *
 * Check that each TRACEPOINT_EVENT provider argument match the
 * TRACEPOINT_PROVIDER by creating dummy callbacks.
 */

/* Reset all macros within TRACEPOINT_EVENT */
#include <lttng/ust-tracepoint-event-reset.h>

static inline
void _TP_COMBINE_TOKENS(__tracepoint_provider_mismatch_, TRACEPOINT_PROVIDER)(void)
{
}

#undef TRACEPOINT_EVENT_CLASS
#define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) 	\
	__tracepoint_provider_mismatch_##_provider();

#undef TRACEPOINT_EVENT_INSTANCE
#define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args)	\
	__tracepoint_provider_mismatch_##_provider();

static __attribute__((unused))
void _TP_COMBINE_TOKENS(__tracepoint_provider_check_, TRACEPOINT_PROVIDER)(void)
{
#include TRACEPOINT_INCLUDE
}

/*
 * Stage 1 of tracepoint event generation.
 *
 * Create event field type metadata section.
 * Each event produce an array of fields.
 */

/* Reset all macros within TRACEPOINT_EVENT */
#include <lttng/ust-tracepoint-event-reset.h>

#undef ctf_integer_ext
#define ctf_integer_ext(_type, _item, _src, _byte_order, _base)	\
	{							\
	  .name = #_item,					\
	  .type = __type_integer(_type, _byte_order, _base, none),\
	},

#undef ctf_float
#define ctf_float(_type, _item, _src)				\
	{							\
	  .name = #_item,					\
	  .type = __type_float(_type),				\
	},

#undef ctf_array_encoded
#define ctf_array_encoded(_type, _item, _src, _length, _encoding) \
	{							\
	  .name = #_item,					\
	  .type =						\
		{						\
		  .atype = atype_array,				\
		  .u.array =					\
			{					\
			    .length = _length,			\
			    .elem_type = __type_integer(_type, BYTE_ORDER, 10, _encoding), \
			},					\
		},						\
	},

#undef ctf_sequence_encoded
#define ctf_sequence_encoded(_type, _item, _src,	\
			_length_type, _src_length, _encoding)	\
	{							\
	  .name = #_item,					\
	  .type =						\
		{						\
		  .atype = atype_sequence,			\
		  .u.sequence =					\
			{					\
			    .length_type = __type_integer(_length_type, BYTE_ORDER, 10, none), \
			    .elem_type = __type_integer(_type, BYTE_ORDER, 10, _encoding), \
			},					\
		},						\
	},

#undef ctf_string
#define ctf_string(_item, _src)					\
	{							\
	  .name = #_item,					\
	  .type =						\
		{						\
		  .atype = atype_string,			\
		  .u.basic.string.encoding = lttng_encode_UTF8,	\
		},						\
	},

#undef TP_FIELDS
#define TP_FIELDS(args...) args	/* Only one used in this phase */

#undef TRACEPOINT_EVENT_CLASS
#define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields)		   	     \
	static const struct lttng_event_field __event_fields___##_provider##___##_name[] = { \
		_fields									     \
	};

#include TRACEPOINT_INCLUDE

/*
 * Stage 2 of tracepoint event generation.
 *
 * Create probe callback prototypes.
 */

/* Reset all macros within TRACEPOINT_EVENT */
#include <lttng/ust-tracepoint-event-reset.h>

#undef TP_ARGS
#define TP_ARGS(args...) args

#undef TRACEPOINT_EVENT_CLASS
#define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields)		\
static void __event_probe__##_provider##___##_name(_TP_ARGS_DATA_PROTO(_args));

#include TRACEPOINT_INCLUDE

/*
 * Stage 3 of tracepoint event generation.
 *
 * Create an array of events.
 */

/* Reset all macros within TRACEPOINT_EVENT */
#include <lttng/ust-tracepoint-event-reset.h>

#undef TRACEPOINT_EVENT_INSTANCE
#define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args)	       \
		{							       \
			.fields = __event_fields___##_provider##___##_template,\
			.name = #_provider ":" #_name,			       \
			.probe_callback = (void *) &__event_probe__##_provider##___##_template,\
			.nr_fields = _TP_ARRAY_SIZE(__event_fields___##_provider##___##_template), \
		},

static const struct lttng_event_desc _TP_COMBINE_TOKENS(__event_desc___, TRACEPOINT_PROVIDER)[] = {
#include TRACEPOINT_INCLUDE
};


/*
 * Stage 4 of tracepoint event generation.
 *
 * Create a toplevel descriptor for the whole probe.
 */

/* non-const because list head will be modified when registered. */
static struct lttng_probe_desc _TP_COMBINE_TOKENS(__probe_desc___, TRACEPOINT_PROVIDER) = {
	.event_desc = _TP_COMBINE_TOKENS(__event_desc___, TRACEPOINT_PROVIDER),
	.nr_events = _TP_ARRAY_SIZE(_TP_COMBINE_TOKENS(__event_desc___, TRACEPOINT_PROVIDER)),
};

/*
 * Stage 5 of tracepoint event generation.
 *
 * Create static inline function that calculates event size.
 */

/* Reset all macros within TRACEPOINT_EVENT */
#include <lttng/ust-tracepoint-event-reset.h>

#undef ctf_integer_ext
#define ctf_integer_ext(_type, _item, _src, _byte_order, _base)		       \
	__event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \
	__event_len += sizeof(_type);

#undef ctf_float
#define ctf_float(_type, _item, _src)		      			       \
	__event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \
	__event_len += sizeof(_type);

#undef ctf_array_encoded
#define ctf_array_encoded(_type, _item, _src, _length, _encoding)	       \
	__event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \
	__event_len += sizeof(_type) * (_length);

#undef ctf_sequence_encoded
#define ctf_sequence_encoded(_type, _item, _src, _length_type,	\
			_src_length, _encoding)			\
	__event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_length_type));   \
	__event_len += sizeof(_length_type);				       \
	__event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \
	__dynamic_len[__dynamic_len_idx] = (_src_length);		       \
	__event_len += sizeof(_type) * __dynamic_len[__dynamic_len_idx];       \
	__dynamic_len_idx++;

#undef ctf_string
#define ctf_string(_item, _src)						       \
	__event_len += __dynamic_len[__dynamic_len_idx++] = strlen(_src) + 1;

#undef TP_ARGS
#define TP_ARGS(args...) args

#undef TP_FIELDS
#define TP_FIELDS(args...) args

#undef TRACEPOINT_EVENT_CLASS
#define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields)      \
static inline size_t __event_get_size__##_provider##___##_name(size_t *__dynamic_len, _TP_ARGS_DATA_PROTO(_args)) \
{									      \
	size_t __event_len = 0;						      \
	unsigned int __dynamic_len_idx = 0;				      \
									      \
	if (0)								      \
		(void) __dynamic_len_idx;	/* don't warn if unused */    \
	_fields								      \
	return __event_len;						      \
}

#include TRACEPOINT_INCLUDE

/*
 * Stage 6 of tracepoint event generation.
 *
 * Create static inline function that calculates event payload alignment.
 */

/* Reset all macros within TRACEPOINT_EVENT */
#include <lttng/ust-tracepoint-event-reset.h>

#undef ctf_integer_ext
#define ctf_integer_ext(_type, _item, _src, _byte_order, _base)		       \
	__event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type));

#undef ctf_float
#define ctf_float(_type, _item, _src)					       \
	__event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type));

#undef ctf_array_encoded
#define ctf_array_encoded(_type, _item, _src, _length, _encoding)	       \
	__event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type));

#undef ctf_sequence_encoded
#define ctf_sequence_encoded(_type, _item, _src, _length_type,	\
			_src_length, _encoding)			\
	__event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_length_type));	  \
	__event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type));

#undef ctf_string
#define ctf_string(_item, _src)

#undef TP_ARGS
#define TP_ARGS(args...) args

#undef TP_FIELDS
#define TP_FIELDS(args...) args

#undef TRACEPOINT_EVENT_CLASS
#define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields)	      \
static inline								      \
size_t __event_get_align__##_provider##___##_name(_TP_ARGS_PROTO(_args))      \
{									      \
	size_t __event_align = 1;					      \
	_fields								      \
	return __event_align;						      \
}

#include TRACEPOINT_INCLUDE


/*
 * Stage 7 of tracepoint event generation.
 *
 * Create the probe function. This function calls event size calculation
 * and writes event data into the buffer.
 */

/* Reset all macros within TRACEPOINT_EVENT */
#include <lttng/ust-tracepoint-event-reset.h>

#undef ctf_integer_ext
#define ctf_integer_ext(_type, _item, _src, _byte_order, _base)	        \
	{								\
		_type __tmp = (_src);					\
		lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__tmp));\
		__chan->ops->event_write(&__ctx, &__tmp, sizeof(__tmp));\
	}

#undef ctf_float
#define ctf_float(_type, _item, _src)				        \
	{								\
		_type __tmp = (_src);					\
		lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__tmp));\
		__chan->ops->event_write(&__ctx, &__tmp, sizeof(__tmp));\
	}

#undef ctf_array_encoded
#define ctf_array_encoded(_type, _item, _src, _length, _encoding)       \
	lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type));	\
	__chan->ops->event_write(&__ctx, _src, sizeof(_type) * (_length));

#undef ctf_sequence_encoded
#define ctf_sequence_encoded(_type, _item, _src, _length_type,		\
			_src_length, _encoding)			\
	{								\
		_length_type __tmpl = __dynamic_len[__dynamic_len_idx];	\
		lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_length_type));\
		__chan->ops->event_write(&__ctx, &__tmpl, sizeof(_length_type));\
	}								\
	lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type));	\
	__chan->ops->event_write(&__ctx, _src,				\
		sizeof(_type) * __get_dynamic_len(dest));

#undef ctf_string
#define ctf_string(_item, _src)					        \
	lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(*(_src)));	\
	__chan->ops->event_write(&__ctx, _src, __get_dynamic_len(dest));

/* Beware: this get len actually consumes the len value */
#undef __get_dynamic_len
#define __get_dynamic_len(field)	__dynamic_len[__dynamic_len_idx++]

#undef TP_ARGS
#define TP_ARGS(args...) args

#undef TP_FIELDS
#define TP_FIELDS(args...) args

#undef TRACEPOINT_EVENT_CLASS
#define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields)	      \
static void __event_probe__##_provider##___##_name(_TP_ARGS_DATA_PROTO(_args))\
{									      \
	struct ltt_event *__event = __tp_data;				      \
	struct ltt_channel *__chan = __event->chan;			      \
	struct lttng_ust_lib_ring_buffer_ctx __ctx;			      \
	size_t __event_len, __event_align;				      \
	size_t __dynamic_len_idx = 0;					      \
	size_t __dynamic_len[_TP_ARRAY_SIZE(__event_fields___##_provider##___##_name)];	      \
	int __ret;							      \
									      \
	if (0)								      \
		(void) __dynamic_len_idx;	/* don't warn if unused */    \
	if (caa_unlikely(!CMM_ACCESS_ONCE(__chan->session->active)))	      \
		return;							      \
	if (caa_unlikely(!CMM_ACCESS_ONCE(__chan->enabled)))		      \
		return;							      \
	if (caa_unlikely(!CMM_ACCESS_ONCE(__event->enabled)))		      \
		return;							      \
	__event_len = __event_get_size__##_provider##___##_name(__dynamic_len,\
		 _TP_ARGS_DATA_VAR(_args));				      \
	__event_align = __event_get_align__##_provider##___##_name(_TP_ARGS_VAR(_args)); \
	lib_ring_buffer_ctx_init(&__ctx, __chan->chan, __event, __event_len,  \
				 __event_align, -1, __chan->handle);	      \
	__ret = __chan->ops->event_reserve(&__ctx, __event->id);	      \
	if (__ret < 0)							      \
		return;							      \
	_fields								      \
	__chan->ops->event_commit(&__ctx);				      \
}

#include TRACEPOINT_INCLUDE

#undef __get_dynamic_len

/*
 * Stage 8 of tracepoint event generation.
 *
 * Register/unregister probes at module load/unload.
 */

/* Reset all macros within TRACEPOINT_EVENT */
#include <lttng/ust-tracepoint-event-reset.h>

static void __attribute__((constructor))
_TP_COMBINE_TOKENS(__lttng_events_init__, TRACEPOINT_PROVIDER)(void)
{
	int ret;

	ret = ltt_probe_register(&_TP_COMBINE_TOKENS(__probe_desc___, TRACEPOINT_PROVIDER));
	assert(!ret);
}

static void __attribute__((destructor))
_TP_COMBINE_TOKENS(__lttng_events_exit__, TRACEPOINT_PROVIDER)(void)
{
	ltt_probe_unregister(&_TP_COMBINE_TOKENS(__probe_desc___, TRACEPOINT_PROVIDER));
}
Commit	Line	Data
1c324e59 MD	1	/*
	2	* Copyright (c) 2011 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	3	*
	4	* THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
	5	* OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
	6	*
	7	* Permission is hereby granted to use or copy this program
	8	* for any purpose, provided the above notices are retained on all copies.
	9	* Permission to modify the code and to distribute modified code is granted,
	10	* provided the above notices are retained, and a notice that the code was
	11	* modified is included with the above copyright notice.
	12	*/
	13
	14	#include <stdio.h>
	15	#include <urcu/compiler.h>
	16	#include <lttng/ust-events.h>
1c324e59	17	#include <lttng/ringbuffer-config.h>
44c72f10	18	#include <string.h>
1c324e59 MD	19
	20	/*
	21	* Macro declarations used for all stages.
	22	*/
	23
	24	#undef ctf_integer
	25	#define ctf_integer(_type, _item, _src) \
	26	ctf_integer_ext(_type, _item, _src, BYTE_ORDER, 10)
	27
	28	#undef ctf_integer_hex
	29	#define ctf_integer_hex(_type, _item, _src) \
	30	ctf_integer_ext(_type, _item, _src, BYTE_ORDER, 16)
	31
	32	#undef ctf_integer_network
	33	#define ctf_integer_network(_type, _item, _src) \
	34	ctf_integer_ext(_type, _item, _src, BIG_ENDIAN, 10)
	35
	36	#undef ctf_integer_network_hex
	37	#define ctf_integer_network_hex(_type, _item, _src) \
	38	ctf_integer_ext(_type, _item, _src, BIG_ENDIAN, 16)
	39
	40	/* ctf_float is redefined at each step */
	41
	42	#undef ctf_array
	43	#define ctf_array(_type, _item, _src, _length) \
	44	ctf_array_encoded(_type, _item, _src, _length, none)
	45
	46	#undef ctf_array_text
	47	#define ctf_array_text(_type, _item, _src, _length) \
	48	ctf_array_encoded(_type, _item, _src, _length, UTF8)
	49
	50	#undef ctf_sequence
	51	#define ctf_sequence(_type, _item, _src, _length_type, _src_length) \
	52	ctf_sequence_encoded(_type, _item, _src, \
	53	_length_type, _src_length, none)
	54
	55	#undef ctf_sequence_text
	56	#define ctf_sequence_text(_type, _item, _src, _length_type, _src_length) \
	57	ctf_sequence_encoded(_type, _item, _src, \
	58	_length_type, _src_length, UTF8)
	59
	60	/* ctf_string is redefined at each step */
	61
	62	/*
	63	* TRACEPOINT_EVENT_CLASS declares a class of tracepoints receiving the
	64	* same arguments and having the same field layout.
	65	*
	66	* TRACEPOINT_EVENT_INSTANCE declares an instance of a tracepoint, with
	67	* its own provider and name. It refers to a class (template).
	68	*
	69	* TRACEPOINT_EVENT declared both a class and an instance and does a
	70	* direct mapping from the instance to the class.
	71	*/
	72
	73	#undef TRACEPOINT_EVENT
	74	#define TRACEPOINT_EVENT(_provider, _name, _args, _fields) \
	75	TRACEPOINT_EVENT_CLASS(_provider, _name, \
	76	_TP_PARAMS(_args), \
	77	_TP_PARAMS(_fields)) \
	78	TRACEPOINT_EVENT_INSTANCE(_provider, _name, _name, \
	79	_TP_PARAMS(args))
	80
	81	/* Helpers */
	82	#define _TP_ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
83
84	#define _tp_max_t(type, x, y) \
85	({ \
86	type __max1 = (x); \
87	type __max2 = (y); \
88	__max1 > __max2 ? __max1: __max2; \
89	})
90
91	/*
92	* Stage 0 of tracepoint event generation.
93	*
94	* Check that each TRACEPOINT_EVENT provider argument match the
95	* TRACEPOINT_PROVIDER by creating dummy callbacks.
96	*/
97
98	/* Reset all macros within TRACEPOINT_EVENT */
99	#include <lttng/ust-tracepoint-event-reset.h>
100
101	static inline
102	void _TP_COMBINE_TOKENS(__tracepoint_provider_mismatch_, TRACEPOINT_PROVIDER)(void)
103	{
104	}
105
106	#undef TRACEPOINT_EVENT_CLASS
107	#define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
108	__tracepoint_provider_mismatch_##_provider();
109
110	#undef TRACEPOINT_EVENT_INSTANCE
111	#define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \
112	__tracepoint_provider_mismatch_##_provider();
113
114	static __attribute__((unused))
115	void _TP_COMBINE_TOKENS(__tracepoint_provider_check_, TRACEPOINT_PROVIDER)(void)
116	{
117	#include TRACEPOINT_INCLUDE
118	}
119
120	/*
121	* Stage 1 of tracepoint event generation.
122	*
123	* Create event field type metadata section.
124	* Each event produce an array of fields.
125	*/
126
127	/* Reset all macros within TRACEPOINT_EVENT */
128	#include <lttng/ust-tracepoint-event-reset.h>
129
130	#undef ctf_integer_ext
131	#define ctf_integer_ext(_type, _item, _src, _byte_order, _base) \
132	{ \
133	.name = #_item, \
134	.type = __type_integer(_type, _byte_order, _base, none),\
135	},
136
137	#undef ctf_float
138	#define ctf_float(_type, _item, _src) \
139	{ \
140	.name = #_item, \
141	.type = __type_float(_type), \
142	},
143
144	#undef ctf_array_encoded
145	#define ctf_array_encoded(_type, _item, _src, _length, _encoding) \
146	{ \
147	.name = #_item, \
148	.type = \
149	{ \
150	.atype = atype_array, \
151	.u.array = \
152	{ \
153	.length = _length, \
154	.elem_type = __type_integer(_type, BYTE_ORDER, 10, _encoding), \
155	}, \
156	}, \
157	},
158
159	#undef ctf_sequence_encoded
160	#define ctf_sequence_encoded(_type, _item, _src, \
161	_length_type, _src_length, _encoding) \
162	{ \
163	.name = #_item, \
164	.type = \
165	{ \
166	.atype = atype_sequence, \
167	.u.sequence = \
168	{ \
169	.length_type = __type_integer(_length_type, BYTE_ORDER, 10, none), \
170	.elem_type = __type_integer(_type, BYTE_ORDER, 10, _encoding), \
171	}, \
172	}, \
173	},
174
175	#undef ctf_string
176	#define ctf_string(_item, _src) \
177	{ \
178	.name = #_item, \
179	.type = \
180	{ \
181	.atype = atype_string, \
182	.u.basic.string.encoding = lttng_encode_UTF8, \
183	}, \
184	},
185
186	#undef TP_FIELDS
187	#define TP_FIELDS(args...) args /* Only one used in this phase */
188
189	#undef TRACEPOINT_EVENT_CLASS
190	#define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
191	static const struct lttng_event_field __event_fields___##_provider##___##_name[] = { \
192	_fields \
193	};
194
195	#include TRACEPOINT_INCLUDE
196
197	/*
198	* Stage 2 of tracepoint event generation.
199	*
200	* Create probe callback prototypes.
201	*/
202
203	/* Reset all macros within TRACEPOINT_EVENT */
204	#include <lttng/ust-tracepoint-event-reset.h>
205
206	#undef TP_ARGS
207	#define TP_ARGS(args...) args
208
209	#undef TRACEPOINT_EVENT_CLASS
210	#define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
211	static void __event_probe__##_provider##___##_name(_TP_ARGS_DATA_PROTO(_args));
212
213	#include TRACEPOINT_INCLUDE
214
215	/*
216	* Stage 3 of tracepoint event generation.
217	*
218	* Create an array of events.
219	*/
220
221	/* Reset all macros within TRACEPOINT_EVENT */
222	#include <lttng/ust-tracepoint-event-reset.h>
223
224	#undef TRACEPOINT_EVENT_INSTANCE
225	#define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \
226	{ \
227	.fields = __event_fields___##_provider##___##_template,\
228	.name = #_provider ":" #_name, \
229	.probe_callback = (void *) &__event_probe__##_provider##___##_template,\
230	.nr_fields = _TP_ARRAY_SIZE(__event_fields___##_provider##___##_template), \
231	},
232
233	static const struct lttng_event_desc _TP_COMBINE_TOKENS(__event_desc___, TRACEPOINT_PROVIDER)[] = {
234	#include TRACEPOINT_INCLUDE
235	};
236
237
238	/*
239	* Stage 4 of tracepoint event generation.
240	*
241	* Create a toplevel descriptor for the whole probe.
242	*/
243
244	/* non-const because list head will be modified when registered. */
245	static struct lttng_probe_desc _TP_COMBINE_TOKENS(__probe_desc___, TRACEPOINT_PROVIDER) = {
246	.event_desc = _TP_COMBINE_TOKENS(__event_desc___, TRACEPOINT_PROVIDER),
247	.nr_events = _TP_ARRAY_SIZE(_TP_COMBINE_TOKENS(__event_desc___, TRACEPOINT_PROVIDER)),
248	};
249
250	/*
251	* Stage 5 of tracepoint event generation.
252	*
253	* Create static inline function that calculates event size.
254	*/
255
256	/* Reset all macros within TRACEPOINT_EVENT */
257	#include <lttng/ust-tracepoint-event-reset.h>
258
259	#undef ctf_integer_ext
260	#define ctf_integer_ext(_type, _item, _src, _byte_order, _base) \
261	__event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \
262	__event_len += sizeof(_type);
263
264	#undef ctf_float
265	#define ctf_float(_type, _item, _src) \
266	__event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \
267	__event_len += sizeof(_type);
268
269	#undef ctf_array_encoded
270	#define ctf_array_encoded(_type, _item, _src, _length, _encoding) \
271	__event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \
272	__event_len += sizeof(_type) * (_length);
273
274	#undef ctf_sequence_encoded
275	#define ctf_sequence_encoded(_type, _item, _src, _length_type, \
276	_src_length, _encoding) \
277	__event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_length_type)); \
278	__event_len += sizeof(_length_type); \
279	__event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \
280	__dynamic_len[__dynamic_len_idx] = (_src_length); \
281	__event_len += sizeof(_type) * __dynamic_len[__dynamic_len_idx]; \
282	__dynamic_len_idx++;
283
284	#undef ctf_string
285	#define ctf_string(_item, _src) \
286	__event_len += __dynamic_len[__dynamic_len_idx++] = strlen(_src) + 1;
287
288	#undef TP_ARGS
289	#define TP_ARGS(args...) args
290
291	#undef TP_FIELDS
292	#define TP_FIELDS(args...) args
293
294	#undef TRACEPOINT_EVENT_CLASS
295	#define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
296	static inline size_t __event_get_size__##_provider##___##_name(size_t *__dynamic_len, _TP_ARGS_DATA_PROTO(_args)) \
297	{ \
298	size_t __event_len = 0; \
299	unsigned int __dynamic_len_idx = 0; \
300	\
301	if (0) \
302	(void) __dynamic_len_idx; /* don't warn if unused */ \
303	_fields \
304	return __event_len; \
305	}
306
307	#include TRACEPOINT_INCLUDE
308
309	/*
310	* Stage 6 of tracepoint event generation.
311	*
312	* Create static inline function that calculates event payload alignment.
313	*/
314
315	/* Reset all macros within TRACEPOINT_EVENT */
316	#include <lttng/ust-tracepoint-event-reset.h>
317
318	#undef ctf_integer_ext
319	#define ctf_integer_ext(_type, _item, _src, _byte_order, _base) \
320	__event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type));
321
322	#undef ctf_float
323	#define ctf_float(_type, _item, _src) \
324	__event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type));
325
326	#undef ctf_array_encoded
327	#define ctf_array_encoded(_type, _item, _src, _length, _encoding) \
328	__event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type));
329
330	#undef ctf_sequence_encoded
331	#define ctf_sequence_encoded(_type, _item, _src, _length_type, \
332	_src_length, _encoding) \
333	__event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_length_type)); \
334	__event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type));
335
336	#undef ctf_string
337	#define ctf_string(_item, _src)
338
339	#undef TP_ARGS
340	#define TP_ARGS(args...) args
341
342	#undef TP_FIELDS
343	#define TP_FIELDS(args...) args
344
345	#undef TRACEPOINT_EVENT_CLASS
346	#define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
347	static inline \
348	size_t __event_get_align__##_provider##___##_name(_TP_ARGS_PROTO(_args)) \
349	{ \
350	size_t __event_align = 1; \
351	_fields \
352	return __event_align; \
353	}
354
355	#include TRACEPOINT_INCLUDE
356
357
358	/*
359	* Stage 7 of tracepoint event generation.
360	*
361	* Create the probe function. This function calls event size calculation
362	* and writes event data into the buffer.
363	*/
364
365	/* Reset all macros within TRACEPOINT_EVENT */
366	#include <lttng/ust-tracepoint-event-reset.h>
367
368	#undef ctf_integer_ext
369	#define ctf_integer_ext(_type, _item, _src, _byte_order, _base) \
370	{ \
371	_type __tmp = (_src); \
372	lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__tmp));\
373	__chan->ops->event_write(&__ctx, &__tmp, sizeof(__tmp));\
374	}
375
376	#undef ctf_float
377	#define ctf_float(_type, _item, _src) \
378	{ \
379	_type __tmp = (_src); \
380	lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__tmp));\
381	__chan->ops->event_write(&__ctx, &__tmp, sizeof(__tmp));\
382	}
383
384	#undef ctf_array_encoded
385	#define ctf_array_encoded(_type, _item, _src, _length, _encoding) \
386	lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \
387	__chan->ops->event_write(&__ctx, _src, sizeof(_type) * (_length));
388
389	#undef ctf_sequence_encoded
390	#define ctf_sequence_encoded(_type, _item, _src, _length_type, \
391	_src_length, _encoding) \
392	{ \
393	_length_type __tmpl = __dynamic_len[__dynamic_len_idx]; \
394	lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_length_type));\
395	__chan->ops->event_write(&__ctx, &__tmpl, sizeof(_length_type));\
396	} \
397	lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \
398	__chan->ops->event_write(&__ctx, _src, \
399	sizeof(_type) * __get_dynamic_len(dest));
400
401	#undef ctf_string
402	#define ctf_string(_item, _src) \
403	lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(*(_src))); \
404	__chan->ops->event_write(&__ctx, _src, __get_dynamic_len(dest));
405
406	/* Beware: this get len actually consumes the len value */
407	#undef __get_dynamic_len
408	#define __get_dynamic_len(field) __dynamic_len[__dynamic_len_idx++]
409
410	#undef TP_ARGS
411	#define TP_ARGS(args...) args
412
413	#undef TP_FIELDS
414	#define TP_FIELDS(args...) args
415
416	#undef TRACEPOINT_EVENT_CLASS
417	#define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
418	static void __event_probe__##_provider##___##_name(_TP_ARGS_DATA_PROTO(_args))\
419	{ \
f280cb51	420	struct ltt_event *__event = __tp_data; \
1c324e59	421	struct ltt_channel *__chan = __event->chan; \
f280cb51	422	struct lttng_ust_lib_ring_buffer_ctx __ctx; \
1c324e59 MD	423	size_t __event_len, __event_align; \
	424	size_t __dynamic_len_idx = 0; \
	425	size_t __dynamic_len[_TP_ARRAY_SIZE(__event_fields___##_provider##___##_name)]; \
	426	int __ret; \
	427	\
	428	if (0) \
	429	(void) __dynamic_len_idx; /* don't warn if unused */ \
	430	if (caa_unlikely(!CMM_ACCESS_ONCE(__chan->session->active))) \
	431	return; \
	432	if (caa_unlikely(!CMM_ACCESS_ONCE(__chan->enabled))) \
	433	return; \
	434	if (caa_unlikely(!CMM_ACCESS_ONCE(__event->enabled))) \
	435	return; \
	436	__event_len = __event_get_size__##_provider##___##_name(__dynamic_len,\
	437	_TP_ARGS_DATA_VAR(_args)); \
	438	__event_align = __event_get_align__##_provider##___##_name(_TP_ARGS_VAR(_args)); \
	439	lib_ring_buffer_ctx_init(&__ctx, __chan->chan, __event, __event_len, \
	440	__event_align, -1, __chan->handle); \
	441	__ret = __chan->ops->event_reserve(&__ctx, __event->id); \
	442	if (__ret < 0) \
	443	return; \
	444	_fields \
	445	__chan->ops->event_commit(&__ctx); \
	446	}
	447
	448	#include TRACEPOINT_INCLUDE
	449
	450	#undef __get_dynamic_len
	451
	452	/*
	453	* Stage 8 of tracepoint event generation.
	454	*
	455	* Register/unregister probes at module load/unload.
	456	*/
	457
	458	/* Reset all macros within TRACEPOINT_EVENT */
	459	#include <lttng/ust-tracepoint-event-reset.h>
	460
	461	static void __attribute__((constructor))
	462	_TP_COMBINE_TOKENS(__lttng_events_init__, TRACEPOINT_PROVIDER)(void)
	463	{
	464	int ret;
	465
	466	ret = ltt_probe_register(&_TP_COMBINE_TOKENS(__probe_desc___, TRACEPOINT_PROVIDER));
	467	assert(!ret);
	468	}
	469
	470	static void __attribute__((destructor))
	471	_TP_COMBINE_TOKENS(__lttng_events_exit__, TRACEPOINT_PROVIDER)(void)
	472	{
	473	ltt_probe_unregister(&_TP_COMBINE_TOKENS(__probe_desc___, TRACEPOINT_PROVIDER));
	474	}