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

/*
 * Code markup for dynamic and static tracing.
 *
 * See Documentation/marker.txt.
 *
 * (C) Copyright 2006 Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
 * (C) Copyright 2009 Pierre-Marc Fournier <pierre-marc dot fournier at polymtl dot ca>
 *
 * 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_MARKER_H
#define _UST_MARKER_H

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

#include <bits/wordsize.h>

struct ust_marker;

/**
 * ust_marker_probe_func - Type of a marker probe function
 * @mdata: marker data
 * @probe_private: probe private data
 * @call_private: call site private data
 * @fmt: format string
 * @args: variable argument list pointer. Use a pointer to overcome C's
 *        inability to pass this around as a pointer in a portable manner in
 *        the callee otherwise.
 *
 * Type of marker probe functions. They receive the mdata and need to parse the
 * format string to recover the variable argument list.
 */
typedef void ust_marker_probe_func(const struct ust_marker *mdata,
		void *probe_private, struct registers *regs, void *call_private,
		const char *fmt, va_list *args);

struct ust_marker_probe_closure {
	ust_marker_probe_func *func;	/* Callback */
	void *probe_private;		/* Private probe data */
};

struct ust_marker {
	const char *channel;	/* Name of channel where to send data */
	const char *name;	/* Marker name */
	const char *format;	/* Marker format string, describing the
				 * variable argument list.
				 */
	char state;		/* State. */
	char ptype;		/* probe type : 0 : single, 1 : multi */
				/* Probe wrapper */
	u16 channel_id;		/* Numeric channel identifier, dynamic */
	u16 event_id;		/* Numeric event identifier, dynamic */
	void (*call)(const struct ust_marker *mdata, void *call_private, struct registers *regs, ...);
	struct ust_marker_probe_closure single;
	struct ust_marker_probe_closure *multi;
	const char *tp_name;	/* Optional tracepoint name */
	void *tp_cb;		/* Optional tracepoint callback */
	void *location;		/* Address of marker in code */
};

#define GET_UST_MARKER(name)		(__ust_marker_ust_##name)

#define _DEFINE_UST_MARKER(channel, name, tp_name_str, tp_cb, format, unique, m)			\
		struct registers __ust_marker_regs;							\
												\
		/* This next asm has to be a basic inline asm (no input/output/clobber), 	\
		 * because it must not require %-sign escaping, as we most certainly		\
		 * have some %-signs in the format string.					\
		 */										\
		asm volatile (									\
			/* We only define these symbols if they have not yet been defined. Indeed, \
			 * if two markers with the same channel/name are on the same line, they	\
			 * will try to create the same symbols, resulting in a conflict. This	\
			 * is not unusual as it can be the result of function inlining.		\
			 */									\
			".ifndef __mstrtab_" __stringify(channel) "_" __stringify(name) "_channel_" __stringify(unique) "\n\t"	\
			/*".section __ust_marker_strings\n\t"*/					\
			".section __ust_marker_strings,\"aw\"\n\t"					\
			"__mstrtab_" __stringify(channel) "_" __stringify(name) "_channel_" __stringify(unique) ":\n\t"	\
			".string \"" __stringify(channel) "\"\n\t"					\
			"__mstrtab_" __stringify(channel) "_" __stringify(name) "_name_" __stringify(unique) ":\n\t"	\
			".string \"" __stringify(name) "\"\n\t"						\
			"__mstrtab_" __stringify(channel) "_" __stringify(name) "_format_" __stringify(unique) ":\n\t"	\
			".string " "\"" format "\"" "\n\t"						\
			".previous\n\t"								\
			".endif\n\t"								\
		);										\
		asm volatile (									\
			/*".section __ust_marker\n\t"*/ \
			".section __ust_marker,\"aw\"\n\t"						\
			"2:\n\t" \
			_ASM_PTR "(__mstrtab_" __stringify(channel) "_" __stringify(name) "_channel_" __stringify(unique) ")\n\t" /* channel string */ \
			_ASM_PTR "(__mstrtab_" __stringify(channel) "_" __stringify(name) "_name_" __stringify(unique) ")\n\t" /* name string */ \
			_ASM_PTR "(__mstrtab_" __stringify(channel) "_" __stringify(name) "_format_" __stringify(unique) ")\n\t" /* format string */ \
			".byte 0\n\t" /* state imv */						\
			".byte 0\n\t" /* ptype */							\
			".hword 0\n\t" /* channel_id */						\
			".hword 0\n\t" /* event_id */						\
			".balign " __stringify(__WORDSIZE) " / 8\n\t" /* alignment */			\
			_ASM_PTR "(ust_marker_probe_cb)\n\t" /* call */				\
			_ASM_PTR "(__ust_marker_empty_function)\n\t" /* ust_marker_probe_closure single.field1 */ \
			_ASM_PTR "0\n\t" /* ust_marker_probe_closure single.field2 */			\
			_ASM_PTR "0\n\t" /* ust_marker_probe_closure *multi */				\
			_ASM_PTR "0\n\t" /* tp_name */						\
			_ASM_PTR "0\n\t" /* tp_cb */						\
			_ASM_PTR "(1f)\n\t" /* location */						\
			".previous\n\t"								\
			/*".section __ust_marker_ptrs\n\t"*/ \
			".section __ust_marker_ptrs,\"a\"\n\t"					\
			_ASM_PTR "(2b)\n\t"							\
			".previous\n\t"								\
			"1:\n\t"								\
			ARCH_COPY_ADDR("%[outptr]")						\
		: [outptr] "=r" (m) );								\
												\
		save_registers(&__ust_marker_regs)


#define DEFINE_UST_MARKER(name, format, unique, m)			\
		_DEFINE_UST_MARKER(ust, name, NULL, NULL, format, unique, m)

#define DEFINE_UST_MARKER_TP(name, tp_name, tp_cb, format)		\
		_DEFINE_UST_MARKER_TP(ust, name, #tp_name, tp_cb, format)

#define _DEFINE_UST_MARKER_TP(channel, name, tp_name_str, tp_cb, format)\
		static const char __mstrtab_##channel##_##name[]	\
		__attribute__((section("__ust_marker_strings")))	\
		= #channel "\0" #name "\0" format;			\
		static struct ust_marker __ust_marker_##channel##_##name\
		__attribute__((section("__ust_marker"))) =		\
		{ __mstrtab_##channel##_##name,				\
			&__mstrtab_##channel##_##name[sizeof(#channel)],\
			&__mstrtab_##channel##_##name[sizeof(#channel) + sizeof(#name)],		\
			0, 0, 0, 0, ust_marker_probe_cb,		\
			{ __ust_marker_empty_function, NULL},		\
			NULL, tp_name_str, tp_cb };			\
		static struct ust_marker * const __ust_marker_ptr_##channel##_##name	\
			__attribute__((used, section("__ust_marker_ptrs"))) =	\
			&__ust_marker_##channel##_##name;

/*
 * Make sure the alignment of the structure in the __ust_marker section will
 * not add unwanted padding between the beginning of the section and the
 * structure. Force alignment to the same alignment as the section start.
 */

#define __ust_marker(channel, name, call_private, format, args...) \
	__ust_marker_counter(channel, name, __LINE__, call_private, format, ## args)

#define __ust_marker_counter(channel, name, unique, call_private, format, args...) \
	do {								\
		struct ust_marker *__ust_marker_counter_ptr;			\
		_DEFINE_UST_MARKER(channel, name, NULL, NULL, format, unique, __ust_marker_counter_ptr);	\
		__ust_marker_check_format(format, ## args);		\
		if (unlikely(__ust_marker_counter_ptr->state)) \
			(__ust_marker_counter_ptr->call)(__ust_marker_counter_ptr, call_private, &__ust_marker_regs, ## args);		\
	} while (0)

#define __ust_marker_tp(channel, name, call_private, tp_name, tp_cb, format, args...) \
	__ust_marker_tp_counter(channel, name, __LINE__, call_private, tp_name, tp_cb, format, ## args)

#define __ust_marker_tp_counter(channel, name, unique, call_private, tp_name, tp_cb, format, args...) \
	do {								\
		struct registers __ust_marker_regs;				\
		void __check_tp_type(void)				\
		{							\
			register_trace_##tp_name(tp_cb, call_private);		\
		}							\
		_DEFINE_UST_MARKER_TP(channel, name, #tp_name, tp_cb, format);	\
		__ust_marker_check_format(format, ## args);		\
		(*__ust_marker_##channel##_##name.call)(&__ust_marker_##channel##_##name,	\
			call_private, &__ust_marker_regs, ## args);				\
	} while (0)

extern void ust_marker_update_probe_range(struct ust_marker * const *begin,
	struct ust_marker * const *end);

/**
 * ust_marker - Marker using code patching
 * @name: marker name, not quoted.
 * @format: format string
 * @args...: variable argument list
 *
 * Places a marker at caller site.
 */
#define ust_marker(name, format, args...) \
	__ust_marker(ust, name, NULL, format, ## args)

/**
 * ust_marker_tp - Marker in a tracepoint callback
 * @name: marker name, not quoted.
 * @tp_name: tracepoint name, not quoted.
 * @tp_cb: tracepoint callback. Should have an associated global symbol so it
 *         is not optimized away by the compiler (should not be static).
 * @format: format string
 * @args...: variable argument list
 *
 * Places a marker in a tracepoint callback.
 */
#define ust_marker_tp(name, tp_name, tp_cb, format, args...)	\
	__ust_marker_tp(ust, name, NULL, tp_name, tp_cb, format, ## args)

/**
 * UST_MARKER_NOARGS - Format string for a marker with no argument.
 */
#define UST_MARKER_NOARGS " "

extern void lock_ust_marker(void);
extern void unlock_ust_marker(void);

extern void ust_marker_compact_event_ids(void);

/* To be used for string format validity checking with gcc */
static inline void __printf(1, 2) ___ust_marker_check_format(const char *fmt, ...)
{
}

#define __ust_marker_check_format(format, args...)			\
	do {								\
		if (0)							\
			___ust_marker_check_format(format, ## args);	\
	} while (0)

extern ust_marker_probe_func __ust_marker_empty_function;

extern void ust_marker_probe_cb(const struct ust_marker *mdata,
	void *call_private, struct registers *regs, ...);

/*
 * Connect a probe to a marker.
 * private data pointer must be a valid allocated memory address, or NULL.
 */
extern int ust_marker_probe_register(const char *channel, const char *name,
	const char *format, ust_marker_probe_func *probe, void *probe_private);

/*
 * Returns the private data given to ust_marker_probe_register.
 */
extern int ust_marker_probe_unregister(const char *channel, const char *name,
	ust_marker_probe_func *probe, void *probe_private);
/*
 * Unregister a marker by providing the registered private data.
 */
extern int ust_marker_probe_unregister_private_data(ust_marker_probe_func *probe,
	void *probe_private);

extern void *ust_marker_get_private_data(const char *channel, const char *name,
	ust_marker_probe_func *probe, int num);

/*
 * ust_marker_synchronize_unregister must be called between the last marker probe
 * unregistration and the first one of
 * - the end of module exit function
 * - the free of any resource used by the probes
 * to ensure the code and data are valid for any possibly running probes.
 */
#define ust_marker_synchronize_unregister() synchronize_sched()

struct ust_marker_iter {
//ust//	struct module *module;
	struct ust_marker_lib *lib;
	struct ust_marker * const *ust_marker;
};

extern void ust_marker_iter_start(struct ust_marker_iter *iter);
extern void ust_marker_iter_next(struct ust_marker_iter *iter);
extern void ust_marker_iter_stop(struct ust_marker_iter *iter);
extern void ust_marker_iter_reset(struct ust_marker_iter *iter);
extern int ust_marker_get_iter_range(struct ust_marker * const **marker, struct ust_marker * const *begin,
	struct ust_marker * const *end);

extern void ust_marker_update_process(void);
extern int is_ust_marker_enabled(const char *channel, const char *name);

//ust// #ifdef CONFIG_UST_MARKER_USERSPACE
//ust// extern void exit_user_ust_marker(struct task_struct *p);
//ust// #else
//ust// static inline void exit_user_ust_marker(struct task_struct *p)
//ust// {
//ust// }
//ust// #endif

struct ust_marker_addr {
	struct ust_marker *marker;
	void *addr;
};

struct ust_marker_lib {
	struct ust_marker * const *ust_marker_start;
#ifdef CONFIG_UST_GDB_INTEGRATION
	struct ust_marker_addr *ust_marker_addr_start;
#endif
	int ust_marker_count;
	struct cds_list_head list;
};

extern int ust_marker_register_lib(struct ust_marker * const *ust_marker_start, int ust_marker_count);
extern int ust_marker_unregister_lib(struct ust_marker * const *ust_marker_start);

#define UST_MARKER_LIB							\
	extern struct ust_marker * const __start___ust_marker_ptrs[] __attribute__((weak, visibility("hidden"))); \
	extern struct ust_marker * const __stop___ust_marker_ptrs[] __attribute__((weak, visibility("hidden"))); \
	static struct ust_marker * const __ust_marker_ptr_dummy			\
		__attribute__((used, section("__ust_marker_ptrs"))) = NULL;\
									\
	static void __attribute__((constructor)) __ust_marker__init(void)	\
	{								\
		ust_marker_register_lib(__start___ust_marker_ptrs,	\
				    __stop___ust_marker_ptrs		\
				    - __start___ust_marker_ptrs);		\
	}								\
									\
	static void __attribute__((destructor)) __ust_marker__destroy(void)\
	{								\
		ust_marker_unregister_lib(__start___ust_marker_ptrs);	\
	}

extern void ust_marker_set_new_ust_marker_cb(void (*cb)(struct ust_marker *));
extern void init_ust_marker(void);

#endif /* _UST_MARKER_H */
Commit	Line	Data
a72ca31a PMF	1	/*
	2	* Code markup for dynamic and static tracing.
	3	*
	4	* See Documentation/marker.txt.
	5	*
	6	* (C) Copyright 2006 Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
59b161cd	7	* (C) Copyright 2009 Pierre-Marc Fournier <pierre-marc dot fournier at polymtl dot ca>
a72ca31a	8	*
8fc2d8db PMF	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; either
	12	* version 2.1 of the License, or (at your option) any later version.
	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
a72ca31a PMF	22	*/
a72ca31a PMF	23
2288bf6d PMF	24	#ifndef _UST_MARKER_H
2288bf6d PMF	25	#define _UST_MARKER_H
e4621c7f	26
a72ca31a	27	#include <stdarg.h>
518d7abb	28	#include <ust/core.h>
22d9080d	29	#include <urcu/list.h>
2782fc4b	30	#include <ust/processor.h>
518d7abb	31	#include <ust/kcompat/kcompat.h>
7b2c5007	32	#include <ust/kcompat/stringify.h>
59b161cd	33
9389f19d PMF	34	#include <bits/wordsize.h>
9389f19d PMF	35
b521931e	36	struct ust_marker;
a72ca31a PMF	37
a72ca31a PMF	38	/**
b521931e	39	* ust_marker_probe_func - Type of a marker probe function
a72ca31a PMF	40	* @mdata: marker data
	41	* @probe_private: probe private data
	42	* @call_private: call site private data
	43	* @fmt: format string
	44	* @args: variable argument list pointer. Use a pointer to overcome C's
	45	* inability to pass this around as a pointer in a portable manner in
	46	* the callee otherwise.
	47	*
	48	* Type of marker probe functions. They receive the mdata and need to parse the
	49	* format string to recover the variable argument list.
	50	*/
b521931e	51	typedef void ust_marker_probe_func(const struct ust_marker *mdata,
75667d04	52	void probe_private, struct registers regs, void *call_private,
a72ca31a PMF	53	const char fmt, va_list args);
a72ca31a PMF	54
b521931e MD	55	struct ust_marker_probe_closure {
b521931e MD	56	ust_marker_probe_func func; / Callback */
a72ca31a PMF	57	void probe_private; / Private probe data */
	58	};
	59
b521931e	60	struct ust_marker {
a72ca31a PMF	61	const char channel; / Name of channel where to send data */
	62	const char name; / Marker name */
	63	const char format; / Marker format string, describing the
	64	* variable argument list.
	65	*/
f36c12ab	66	char state; /* State. */
a72ca31a PMF	67	char ptype; /* probe type : 0 : single, 1 : multi */
	68	/* Probe wrapper */
	69	u16 channel_id; /* Numeric channel identifier, dynamic */
	70	u16 event_id; /* Numeric event identifier, dynamic */
b521931e MD	71	void (call)(const struct ust_marker mdata, void call_private, struct registers regs, ...);
	72	struct ust_marker_probe_closure single;
	73	struct ust_marker_probe_closure *multi;
a72ca31a PMF	74	const char tp_name; / Optional tracepoint name */
a72ca31a PMF	75	void tp_cb; / Optional tracepoint callback */
3ea1e2fc	76	void location; / Address of marker in code */
eb5d20c6	77	};
a72ca31a	78
b521931e	79	#define GET_UST_MARKER(name) (__ust_marker_ust_##name)
7b2c5007	80
b521931e MD	81	#define _DEFINE_UST_MARKER(channel, name, tp_name_str, tp_cb, format, unique, m) \
b521931e MD	82	struct registers __ust_marker_regs; \
bb9ade29	83	\
a4db742a	84	/* This next asm has to be a basic inline asm (no input/output/clobber), \
9692fa18 PMF	85	* because it must not require %-sign escaping, as we most certainly \
	86	* have some %-signs in the format string. \
	87	*/ \
f91aa730 DG	88	asm volatile ( \
	89	/* We only define these symbols if they have not yet been defined. Indeed, \
	90	* if two markers with the same channel/name are on the same line, they \
	91	* will try to create the same symbols, resulting in a conflict. This \
	92	* is not unusual as it can be the result of function inlining. \
	93	*/ \
	94	".ifndef __mstrtab_" __stringify(channel) "_" __stringify(name) "_channel_" __stringify(unique) "\n\t" \
b521931e MD	95	/".section __ust_marker_strings\n\t"/ \
b521931e MD	96	".section __ust_marker_strings,\"aw\"\n\t" \
f91aa730 DG	97	"__mstrtab_" __stringify(channel) "_" __stringify(name) "_channel_" __stringify(unique) ":\n\t" \
	98	".string \"" __stringify(channel) "\"\n\t" \
	99	"__mstrtab_" __stringify(channel) "_" __stringify(name) "_name_" __stringify(unique) ":\n\t" \
	100	".string \"" __stringify(name) "\"\n\t" \
	101	"__mstrtab_" __stringify(channel) "_" __stringify(name) "_format_" __stringify(unique) ":\n\t" \
	102	".string " "\"" format "\"" "\n\t" \
	103	".previous\n\t" \
	104	".endif\n\t" \
9692fa18 PMF	105	); \
9692fa18 PMF	106	asm volatile ( \
b521931e MD	107	/".section __ust_marker\n\t"/ \
b521931e MD	108	".section __ust_marker,\"aw\"\n\t" \
f91aa730 DG	109	"2:\n\t" \
	110	_ASM_PTR "(__mstrtab_" __stringify(channel) "_" __stringify(name) "_channel_" __stringify(unique) ")\n\t" /* channel string */ \
	111	_ASM_PTR "(__mstrtab_" __stringify(channel) "_" __stringify(name) "_name_" __stringify(unique) ")\n\t" /* name string */ \
	112	_ASM_PTR "(__mstrtab_" __stringify(channel) "_" __stringify(name) "_format_" __stringify(unique) ")\n\t" /* format string */ \
	113	".byte 0\n\t" /* state imv */ \
	114	".byte 0\n\t" /* ptype */ \
34174843 MD	115	".hword 0\n\t" /* channel_id */ \
34174843 MD	116	".hword 0\n\t" /* event_id */ \
f91aa730	117	".balign " __stringify(__WORDSIZE) " / 8\n\t" /* alignment */ \
b521931e MD	118	_ASM_PTR "(ust_marker_probe_cb)\n\t" /* call */ \
	119	_ASM_PTR "(__ust_marker_empty_function)\n\t" /* ust_marker_probe_closure single.field1 */ \
	120	_ASM_PTR "0\n\t" /* ust_marker_probe_closure single.field2 */ \
	121	_ASM_PTR "0\n\t" /* ust_marker_probe_closure multi / \
f91aa730 DG	122	_ASM_PTR "0\n\t" /* tp_name */ \
	123	_ASM_PTR "0\n\t" /* tp_cb */ \
	124	_ASM_PTR "(1f)\n\t" /* location */ \
	125	".previous\n\t" \
b521931e MD	126	/".section __ust_marker_ptrs\n\t"/ \
b521931e MD	127	".section __ust_marker_ptrs,\"a\"\n\t" \
eb5d20c6 MD	128	_ASM_PTR "(2b)\n\t" \
	129	".previous\n\t" \
	130	"1:\n\t" \
f91aa730	131	ARCH_COPY_ADDR("%[outptr]") \
9692fa18	132	: [outptr] "=r" (m) ); \
bb9ade29	133	\
b521931e	134	save_registers(&__ust_marker_regs)
3ea1e2fc PMF	135
3ea1e2fc PMF	136
b521931e MD	137	#define DEFINE_UST_MARKER(name, format, unique, m) \
b521931e MD	138	_DEFINE_UST_MARKER(ust, name, NULL, NULL, format, unique, m)
a72ca31a	139
b521931e MD	140	#define DEFINE_UST_MARKER_TP(name, tp_name, tp_cb, format) \
b521931e MD	141	_DEFINE_UST_MARKER_TP(ust, name, #tp_name, tp_cb, format)
7166e240	142
b521931e	143	#define _DEFINE_UST_MARKER_TP(channel, name, tp_name_str, tp_cb, format)\
7166e240	144	static const char __mstrtab_##channel##_##name[] \
b521931e	145	__attribute__((section("__ust_marker_strings"))) \
7166e240	146	= #channel "\0" #name "\0" format; \
b521931e MD	147	static struct ust_marker __ust_marker_##channel##_##name\
b521931e MD	148	__attribute__((section("__ust_marker"))) = \
7166e240	149	{ __mstrtab_##channel##_##name, \
b521931e	150	&__mstrtab_##channel##_##name[sizeof(#channel)],\
f91aa730	151	&__mstrtab_##channel##_##name[sizeof(#channel) + sizeof(#name)], \
b521931e MD	152	0, 0, 0, 0, ust_marker_probe_cb, \
b521931e MD	153	{ __ust_marker_empty_function, NULL}, \
eb5d20c6	154	NULL, tp_name_str, tp_cb }; \
b521931e MD	155	static struct ust_marker * const __ust_marker_ptr_##channel##_##name \
	156	__attribute__((used, section("__ust_marker_ptrs"))) = \
	157	&__ust_marker_##channel##_##name;
a72ca31a PMF	158
a72ca31a PMF	159	/*
b521931e	160	* Make sure the alignment of the structure in the __ust_marker section will
a72ca31a PMF	161	* not add unwanted padding between the beginning of the section and the
a72ca31a PMF	162	* structure. Force alignment to the same alignment as the section start.
a72ca31a	163	*/
bb9ade29	164
f36c12ab MD	165	#define __ust_marker(channel, name, call_private, format, args...) \
f36c12ab MD	166	__ust_marker_counter(channel, name, __LINE__, call_private, format, ## args)
bb9ade29	167
f36c12ab	168	#define __ust_marker_counter(channel, name, unique, call_private, format, args...) \
a72ca31a	169	do { \
b521931e MD	170	struct ust_marker *__ust_marker_counter_ptr; \
	171	_DEFINE_UST_MARKER(channel, name, NULL, NULL, format, unique, __ust_marker_counter_ptr); \
	172	__ust_marker_check_format(format, ## args); \
f36c12ab MD	173	if (unlikely(__ust_marker_counter_ptr->state)) \
f36c12ab MD	174	(__ust_marker_counter_ptr->call)(__ust_marker_counter_ptr, call_private, &__ust_marker_regs, ## args); \
a72ca31a PMF	175	} while (0)
a72ca31a PMF	176
686debc3 MD	177	#define __ust_marker_tp(channel, name, call_private, tp_name, tp_cb, format, args...) \
686debc3 MD	178	__ust_marker_tp_counter(channel, name, __LINE__, call_private, tp_name, tp_cb, format, ## args)
bb9ade29	179
686debc3	180	#define __ust_marker_tp_counter(channel, name, unique, call_private, tp_name, tp_cb, format, args...) \
a72ca31a	181	do { \
b521931e	182	struct registers __ust_marker_regs; \
a72ca31a PMF	183	void __check_tp_type(void) \
a72ca31a PMF	184	{ \
245d371e	185	register_trace_##tp_name(tp_cb, call_private); \
a72ca31a	186	} \
b521931e MD	187	_DEFINE_UST_MARKER_TP(channel, name, #tp_name, tp_cb, format); \
	188	__ust_marker_check_format(format, ## args); \
	189	(*__ust_marker_##channel##_##name.call)(&__ust_marker_##channel##_##name, \
	190	call_private, &__ust_marker_regs, ## args); \
a72ca31a PMF	191	} while (0)
a72ca31a PMF	192
b521931e MD	193	extern void ust_marker_update_probe_range(struct ust_marker * const *begin,
b521931e MD	194	struct ust_marker * const *end);
a72ca31a	195
a72ca31a	196	/**
686debc3	197	* ust_marker - Marker using code patching
a72ca31a PMF	198	* @name: marker name, not quoted.
	199	* @format: format string
	200	* @args...: variable argument list
	201	*
f36c12ab	202	* Places a marker at caller site.
a72ca31a	203	*/
686debc3	204	#define ust_marker(name, format, args...) \
f36c12ab	205	__ust_marker(ust, name, NULL, format, ## args)
a72ca31a PMF	206
a72ca31a PMF	207	/**
686debc3	208	* ust_marker_tp - Marker in a tracepoint callback
a72ca31a PMF	209	* @name: marker name, not quoted.
	210	* @tp_name: tracepoint name, not quoted.
	211	* @tp_cb: tracepoint callback. Should have an associated global symbol so it
	212	* is not optimized away by the compiler (should not be static).
	213	* @format: format string
	214	* @args...: variable argument list
	215	*
	216	* Places a marker in a tracepoint callback.
	217	*/
686debc3 MD	218	#define ust_marker_tp(name, tp_name, tp_cb, format, args...) \
686debc3 MD	219	__ust_marker_tp(ust, name, NULL, tp_name, tp_cb, format, ## args)
a72ca31a PMF	220
a72ca31a PMF	221	/**
b521931e	222	* UST_MARKER_NOARGS - Format string for a marker with no argument.
a72ca31a	223	*/
b521931e	224	#define UST_MARKER_NOARGS " "
a72ca31a	225
b521931e MD	226	extern void lock_ust_marker(void);
b521931e MD	227	extern void unlock_ust_marker(void);
a72ca31a	228
b521931e	229	extern void ust_marker_compact_event_ids(void);
a72ca31a PMF	230
a72ca31a PMF	231	/* To be used for string format validity checking with gcc */
b521931e	232	static inline void __printf(1, 2) ___ust_marker_check_format(const char *fmt, ...)
a72ca31a PMF	233	{
	234	}
	235
b521931e	236	#define __ust_marker_check_format(format, args...) \
a72ca31a PMF	237	do { \
a72ca31a PMF	238	if (0) \
b521931e	239	___ust_marker_check_format(format, ## args); \
a72ca31a PMF	240	} while (0)
a72ca31a PMF	241
b521931e	242	extern ust_marker_probe_func __ust_marker_empty_function;
a72ca31a	243
b521931e	244	extern void ust_marker_probe_cb(const struct ust_marker *mdata,
75667d04	245	void call_private, struct registers regs, ...);
a72ca31a PMF	246
	247	/*
	248	* Connect a probe to a marker.
	249	* private data pointer must be a valid allocated memory address, or NULL.
	250	*/
b521931e MD	251	extern int ust_marker_probe_register(const char channel, const char name,
b521931e MD	252	const char format, ust_marker_probe_func probe, void *probe_private);
a72ca31a PMF	253
a72ca31a PMF	254	/*
b521931e	255	* Returns the private data given to ust_marker_probe_register.
a72ca31a	256	*/
b521931e MD	257	extern int ust_marker_probe_unregister(const char channel, const char name,
b521931e MD	258	ust_marker_probe_func probe, void probe_private);
a72ca31a PMF	259	/*
	260	* Unregister a marker by providing the registered private data.
	261	*/
b521931e	262	extern int ust_marker_probe_unregister_private_data(ust_marker_probe_func *probe,
a72ca31a PMF	263	void *probe_private);
a72ca31a PMF	264
b521931e MD	265	extern void ust_marker_get_private_data(const char channel, const char *name,
b521931e MD	266	ust_marker_probe_func *probe, int num);
a72ca31a PMF	267
a72ca31a PMF	268	/*
b521931e	269	* ust_marker_synchronize_unregister must be called between the last marker probe
a72ca31a PMF	270	* unregistration and the first one of
	271	* - the end of module exit function
	272	* - the free of any resource used by the probes
	273	* to ensure the code and data are valid for any possibly running probes.
	274	*/
b521931e	275	#define ust_marker_synchronize_unregister() synchronize_sched()
a72ca31a	276
b521931e	277	struct ust_marker_iter {
98963de4	278	//ust// struct module *module;
b521931e MD	279	struct ust_marker_lib *lib;
b521931e MD	280	struct ust_marker * const *ust_marker;
a72ca31a PMF	281	};
a72ca31a PMF	282
b521931e MD	283	extern void ust_marker_iter_start(struct ust_marker_iter *iter);
	284	extern void ust_marker_iter_next(struct ust_marker_iter *iter);
	285	extern void ust_marker_iter_stop(struct ust_marker_iter *iter);
	286	extern void ust_marker_iter_reset(struct ust_marker_iter *iter);
	287	extern int ust_marker_get_iter_range(struct ust_marker * const *marker, struct ust_marker const *begin,
	288	struct ust_marker * const *end);
a72ca31a	289
b521931e MD	290	extern void ust_marker_update_process(void);
b521931e MD	291	extern int is_ust_marker_enabled(const char channel, const char name);
a72ca31a	292
b521931e MD	293	//ust// #ifdef CONFIG_UST_MARKER_USERSPACE
b521931e MD	294	//ust// extern void exit_user_ust_marker(struct task_struct *p);
59b161cd	295	//ust// #else
b521931e	296	//ust// static inline void exit_user_ust_marker(struct task_struct *p)
59b161cd PMF	297	//ust// {
	298	//ust// }
	299	//ust// #endif
a72ca31a	300
b521931e MD	301	struct ust_marker_addr {
b521931e MD	302	struct ust_marker *marker;
3ea1e2fc PMF	303	void *addr;
3ea1e2fc PMF	304	};
98963de4	305
b521931e MD	306	struct ust_marker_lib {
b521931e MD	307	struct ust_marker * const *ust_marker_start;
defa46a7	308	#ifdef CONFIG_UST_GDB_INTEGRATION
b521931e	309	struct ust_marker_addr *ust_marker_addr_start;
defa46a7	310	#endif
b521931e	311	int ust_marker_count;
0222e121	312	struct cds_list_head list;
98963de4 PMF	313	};
98963de4 PMF	314
b521931e MD	315	extern int ust_marker_register_lib(struct ust_marker * const *ust_marker_start, int ust_marker_count);
b521931e MD	316	extern int ust_marker_unregister_lib(struct ust_marker * const *ust_marker_start);
defa46a7	317
b521931e MD	318	#define UST_MARKER_LIB \
	319	extern struct ust_marker * const __start___ust_marker_ptrs[] __attribute__((weak, visibility("hidden"))); \
	320	extern struct ust_marker * const __stop___ust_marker_ptrs[] __attribute__((weak, visibility("hidden"))); \
	321	static struct ust_marker * const __ust_marker_ptr_dummy \
	322	__attribute__((used, section("__ust_marker_ptrs"))) = NULL;\
55994a67	323	\
b521931e	324	static void __attribute__((constructor)) __ust_marker__init(void) \
55994a67	325	{ \
b521931e MD	326	ust_marker_register_lib(__start___ust_marker_ptrs, \
	327	__stop___ust_marker_ptrs \
	328	- __start___ust_marker_ptrs); \
900e307e MD	329	} \
900e307e MD	330	\
b521931e	331	static void __attribute__((destructor)) __ust_marker__destroy(void)\
24b6668c	332	{ \
b521931e	333	ust_marker_unregister_lib(__start___ust_marker_ptrs); \
55994a67	334	}
98963de4	335
b521931e MD	336	extern void ust_marker_set_new_ust_marker_cb(void (cb)(struct ust_marker ));
b521931e MD	337	extern void init_ust_marker(void);
9160b4e4	338
defa46a7	339	#endif /* _UST_MARKER_H */