[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>
//ust// #include <linux/types.h>
#include <ust/immediate.h>
//ust// #include <linux/ltt-channels.h>
#include <ust/kernelcompat.h>
#include <kcompat/list.h>
#include <ust/processor.h>

//ust// struct module;
//ust// struct task_struct;
struct marker;

/* To stringify the expansion of a define */
#define XSTR(d) STR(d)
#define STR(s) #s

/**
 * 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 marker_probe_func(const struct marker *mdata,
		void *probe_private, struct registers *regs, void *call_private,
		const char *fmt, va_list *args);

struct marker_probe_closure {
	marker_probe_func *func;	/* Callback */
	void *probe_private;		/* Private probe data */
};

struct 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.
				 */
 	DEFINE_IMV(char, state);/* Immediate value 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 marker *mdata, void *call_private, struct registers *regs, ...);
	struct marker_probe_closure single;
	struct marker_probe_closure *multi;
	const char *tp_name;	/* Optional tracepoint name */
	void *tp_cb;		/* Optional tracepoint callback */
	void *location;		/* Address of marker in code */
} __attribute__((aligned(8)));

#define CONFIG_MARKERS
#ifdef CONFIG_MARKERS

#define _DEFINE_MARKER(channel, name, tp_name_str, tp_cb, format, unique)	\
		static const char __old_mstrtab_##channel##_##name[]		\
		__attribute__((section("__old_markers_strings")))		\
		= #channel "\0" #name "\0" format;				\
		struct registers regs;						\
		static struct marker *__pmark_##channel##_##name;		\
		static struct marker __old_mark_##channel##_##name		\
		__attribute__((section("__old_markers"), aligned(8))) =		\
		{ __old_mstrtab_##channel##_##name,				\
		  &__old_mstrtab_##channel##_##name[sizeof(#channel)],		\
		  &__old_mstrtab_##channel##_##name[sizeof(#channel) +		\
						sizeof(#name)],			\
		  0, 0, 0, 0, marker_probe_cb,					\
		  { __mark_empty_function, NULL},				\
		  NULL, tp_name_str, tp_cb, NULL };				\
										\
		/* 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 ( 									\
		     ".section __markers_strings,\"aw\",@progbits\n\t"				\
		     "__mstrtab_" XSTR(channel) "_" XSTR(name) "_channel_" XSTR(unique) ":\n\t"	\
		     ".string \"" XSTR(channel) "\"\n\t"					\
		     "__mstrtab_" XSTR(channel) "_" XSTR(name) "_name_" XSTR(unique) ":\n\t"	\
		     ".string \"" XSTR(name) "\"\n\t"						\
		     "__mstrtab_" XSTR(channel) "_" XSTR(name) "_format_" XSTR(unique) ":\n\t"	\
		     ".string " XSTR(format) "\n\t"						\
		     ".previous\n\t"								\
		     ".section __markers,\"aw\",@progbits\n\t"					\
		     ".align 8\n\t"								\
		     "__mark_struct_" XSTR(unique) ":\n\t" \
		     _ASM_PTR "(__mstrtab_" XSTR(channel) "_" XSTR(name) "_channel_" XSTR(unique) ")\n\t" /* channel string */ \
		     _ASM_PTR "(__mstrtab_" XSTR(channel) "_" XSTR(name) "_name_" XSTR(unique) ")\n\t" /* name string */ \
		     _ASM_PTR "(__mstrtab_" XSTR(channel) "_" XSTR(name) "_format_" XSTR(unique) ")\n\t" /* format string */ \
		     ".byte 0\n\t" /* state imv */						\
		     ".byte 0\n\t" /* ptype */							\
		     ".word 0\n\t" /* channel_id */						\
		     ".word 0\n\t" /* event_id */						\
		     ".align " XSTR(__SIZEOF_POINTER__) "\n\t" /* alignment */			\
		     _ASM_PTR "(marker_probe_cb)\n\t" /* call */				\
		     _ASM_PTR "(__mark_empty_function)\n\t" /* marker_probe_closure single.field1 */ \
		     _ASM_PTR "0\n\t" /* marker_probe_closure single.field2 */			\
		     _ASM_PTR "0\n\t" /* marker_probe_closure *multi */				\
		     _ASM_PTR "0\n\t" /* tp_name */						\
		     _ASM_PTR "0\n\t" /* tp_cb */						\
		     "__mark_location_" XSTR(unique) ":\n\t"					\
		     _ASM_PTR "(1f)\n\t" /* location */						\
		     ".previous\n\t"								\
		     "1:\n\t"									\
		);										\
		asm volatile ( \
		     "mov ""$__mark_struct_" XSTR(unique) ", %[pmark_struct]\n\t" \
		: [pmark_struct] "=r" (__pmark_##channel##_##name) :: "memory" \
		); \
		\
		save_registers(&regs)


#define DEFINE_MARKER(channel, name, format)				\
		_DEFINE_MARKER(channel, name, NULL, NULL, format, __COUNTER__)

#define DEFINE_MARKER_TP(channel, name, tp_name, tp_cb, format)		\
		_DEFINE_MARKER(channel, name, #tp_name, tp_cb, format, __COUNTER__)

/*
 * Make sure the alignment of the structure in the __markers 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.
 *
 * The "generic" argument controls which marker enabling mechanism must be used.
 * If generic is true, a variable read is used.
 * If generic is false, immediate values are used.
 */
#define __trace_mark(generic, channel, name, call_private, format, args...) \
	do {								\
		DEFINE_MARKER(channel, name, format);			\
		__mark_check_format(format, ## args);			\
		if (!generic) {						\
			if (unlikely(imv_read(				\
					__pmark_##channel##_##name->state))) \
				(*__pmark_##channel##_##name->call)	\
					(__pmark_##channel##_##name,	\
					call_private, &regs, ## args);		\
		} else {						\
			if (unlikely(_imv_read(				\
					__pmark_##channel##_##name->state))) \
				(__pmark_##channel##_##name->call)	\
					(__pmark_##channel##_##name,	\
					call_private, &regs, ## args);		\
		}							\
	} while (0)

#define __trace_mark_tp(channel, name, call_private, tp_name, tp_cb,	\
			format, args...)				\
	do {								\
		void __check_tp_type(void)				\
		{							\
			register_trace_##tp_name(tp_cb);		\
		}							\
		DEFINE_MARKER_TP(channel, name, tp_name, tp_cb, format);\
		__mark_check_format(format, ## args);			\
		(*__mark_##channel##_##name.call)(&__mark_##channel##_##name, \
			call_private, &regs, ## args);				\
	} while (0)

extern void marker_update_probe_range(struct marker *begin,
	struct marker *end);

#define GET_MARKER(channel, name)	(__mark_##channel##_##name)

#else /* !CONFIG_MARKERS */
#define DEFINE_MARKER(channel, name, tp_name, tp_cb, format)
#define __trace_mark(generic, channel, name, call_private, format, args...) \
		__mark_check_format(format, ## args)
#define __trace_mark_tp(channel, name, call_private, tp_name, tp_cb,	\
		format, args...)					\
	do {								\
		void __check_tp_type(void)				\
		{							\
			register_trace_##tp_name(tp_cb);		\
		}							\
		__mark_check_format(format, ## args);			\
	} while (0)
static inline void marker_update_probe_range(struct marker *begin,
	struct marker *end)
{ }
#define GET_MARKER(channel, name)
#endif /* CONFIG_MARKERS */

/**
 * trace_mark - Marker using code patching
 * @channel: marker channel (where to send the data), not quoted.
 * @name: marker name, not quoted.
 * @format: format string
 * @args...: variable argument list
 *
 * Places a marker using optimized code patching technique (imv_read())
 * to be enabled when immediate values are present.
 */
#define trace_mark(channel, name, format, args...) \
	__trace_mark(0, channel, name, NULL, format, ## args)

/**
 * _trace_mark - Marker using variable read
 * @channel: marker channel (where to send the data), not quoted.
 * @name: marker name, not quoted.
 * @format: format string
 * @args...: variable argument list
 *
 * Places a marker using a standard memory read (_imv_read()) to be
 * enabled. Should be used for markers in code paths where instruction
 * modification based enabling is not welcome. (__init and __exit functions,
 * lockdep, some traps, printk).
 */
#define _trace_mark(channel, name, format, args...) \
	__trace_mark(1, channel, name, NULL, format, ## args)

/**
 * trace_mark_tp - Marker in a tracepoint callback
 * @channel: marker channel (where to send the data), not quoted.
 * @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 trace_mark_tp(channel, name, tp_name, tp_cb, format, args...)	\
	__trace_mark_tp(channel, name, NULL, tp_name, tp_cb, format, ## args)

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

extern void lock_markers(void);
extern void unlock_markers(void);

extern void markers_compact_event_ids(void);

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

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

extern marker_probe_func __mark_empty_function;

extern void marker_probe_cb(const struct 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 marker_probe_register(const char *channel, const char *name,
	const char *format, marker_probe_func *probe, void *probe_private);

/*
 * Returns the private data given to marker_probe_register.
 */
extern int marker_probe_unregister(const char *channel, const char *name,
	marker_probe_func *probe, void *probe_private);
/*
 * Unregister a marker by providing the registered private data.
 */
extern int marker_probe_unregister_private_data(marker_probe_func *probe,
	void *probe_private);

extern void *marker_get_private_data(const char *channel, const char *name,
	marker_probe_func *probe, int num);

/*
 * 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 marker_synchronize_unregister() synchronize_sched()

struct marker_iter {
//ust//	struct module *module;
	struct lib *lib;
	struct marker *marker;
};

extern void marker_iter_start(struct marker_iter *iter);
extern void marker_iter_next(struct marker_iter *iter);
extern void marker_iter_stop(struct marker_iter *iter);
extern void marker_iter_reset(struct marker_iter *iter);
extern int marker_get_iter_range(struct marker **marker, struct marker *begin,
	struct marker *end);

extern void marker_update_process(void);
extern int is_marker_enabled(const char *channel, const char *name);

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

struct marker_addr {
	struct marker *marker;
	void *addr;
};

struct lib {
	struct marker *markers_start;
#ifdef CONFIG_UST_GDB_INTEGRATION
	struct marker_addr *markers_addr_start;
#endif
	int markers_count;
	struct list_head list;
};

extern int marker_register_lib(struct marker *markers_start, int markers_count);

#define MARKER_LIB							\
	extern struct marker __start___markers[] __attribute__((weak, visibility("hidden"))); \
	extern struct marker __stop___markers[] __attribute__((weak, visibility("hidden"))); \
									\
	static void __attribute__((constructor)) __markers__init(void)	\
	{								\
		marker_register_lib(__start___markers, (((long)__stop___markers)-((long)__start___markers))/sizeof(struct marker)); \
	}

extern void marker_set_new_marker_cb(void (*cb)(struct marker *));
extern void init_markers(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>
59b161cd	28	//ust// #include <linux/types.h>
93d0f2ea	29	#include <ust/immediate.h>
59b161cd	30	//ust// #include <linux/ltt-channels.h>
fbca6b62	31	#include <ust/kernelcompat.h>
769d0157	32	#include <kcompat/list.h>
2782fc4b	33	#include <ust/processor.h>
59b161cd PMF	34
	35	//ust// struct module;
	36	//ust// struct task_struct;
a72ca31a PMF	37	struct marker;
a72ca31a PMF	38
a4db742a PMF	39	/* To stringify the expansion of a define */
	40	#define XSTR(d) STR(d)
	41	#define STR(s) #s
	42
a72ca31a PMF	43	/**
	44	* marker_probe_func - Type of a marker probe function
	45	* @mdata: marker data
	46	* @probe_private: probe private data
	47	* @call_private: call site private data
	48	* @fmt: format string
	49	* @args: variable argument list pointer. Use a pointer to overcome C's
	50	* inability to pass this around as a pointer in a portable manner in
	51	* the callee otherwise.
	52	*
	53	* Type of marker probe functions. They receive the mdata and need to parse the
	54	* format string to recover the variable argument list.
	55	*/
	56	typedef void marker_probe_func(const struct marker *mdata,
75667d04	57	void probe_private, struct registers regs, void *call_private,
a72ca31a PMF	58	const char fmt, va_list args);
	59
	60	struct marker_probe_closure {
	61	marker_probe_func func; / Callback */
	62	void probe_private; / Private probe data */
	63	};
	64
	65	struct marker {
	66	const char channel; / Name of channel where to send data */
	67	const char name; / Marker name */
	68	const char format; / Marker format string, describing the
	69	* variable argument list.
	70	*/
59b161cd	71	DEFINE_IMV(char, state);/* Immediate value state. */
a72ca31a PMF	72	char ptype; /* probe type : 0 : single, 1 : multi */
	73	/* Probe wrapper */
	74	u16 channel_id; /* Numeric channel identifier, dynamic */
	75	u16 event_id; /* Numeric event identifier, dynamic */
75667d04	76	void (call)(const struct marker mdata, void call_private, struct registers regs, ...);
a72ca31a PMF	77	struct marker_probe_closure single;
	78	struct marker_probe_closure *multi;
	79	const char tp_name; / Optional tracepoint name */
	80	void tp_cb; / Optional tracepoint callback */
3ea1e2fc	81	void location; / Address of marker in code */
a72ca31a PMF	82	} __attribute__((aligned(8)));
a72ca31a PMF	83
872037bb PMF	84	#define CONFIG_MARKERS
872037bb PMF	85	#ifdef CONFIG_MARKERS
a72ca31a	86
a4db742a PMF	87	#define _DEFINE_MARKER(channel, name, tp_name_str, tp_cb, format, unique) \
	88	static const char __old_mstrtab_##channel##_##name[] \
	89	__attribute__((section("__old_markers_strings"))) \
	90	= #channel "\0" #name "\0" format; \
	91	struct registers regs; \
	92	static struct marker *__pmark_##channel##_##name; \
	93	static struct marker __old_mark_##channel##_##name \
	94	__attribute__((section("__old_markers"), aligned(8))) = \
	95	{ __old_mstrtab_##channel##_##name, \
	96	&__old_mstrtab_##channel##_##name[sizeof(#channel)], \
	97	&__old_mstrtab_##channel##_##name[sizeof(#channel) + \
	98	sizeof(#name)], \
	99	0, 0, 0, 0, marker_probe_cb, \
	100	{ __mark_empty_function, NULL}, \
	101	NULL, tp_name_str, tp_cb, NULL }; \
	102	\
	103	/* This next asm has to be a basic inline asm (no input/output/clobber), \
443addf6 PMF	104	because it must not require %-sign escaping, as we most certainly \
443addf6 PMF	105	have some %-signs in the format string. */ \
a4db742a PMF	106	asm volatile ( \
a4db742a PMF	107	".section __markers_strings,\"aw\",@progbits\n\t" \
a4db742a PMF	108	"__mstrtab_" XSTR(channel) "_" XSTR(name) "_channel_" XSTR(unique) ":\n\t" \
	109	".string \"" XSTR(channel) "\"\n\t" \
	110	"__mstrtab_" XSTR(channel) "_" XSTR(name) "_name_" XSTR(unique) ":\n\t" \
	111	".string \"" XSTR(name) "\"\n\t" \
	112	"__mstrtab_" XSTR(channel) "_" XSTR(name) "_format_" XSTR(unique) ":\n\t" \
	113	".string " XSTR(format) "\n\t" \
	114	".previous\n\t" \
	115	".section __markers,\"aw\",@progbits\n\t" \
	116	".align 8\n\t" \
6b68d79d PMF	117	"__mark_struct_" XSTR(unique) ":\n\t" \
	118	_ASM_PTR "(__mstrtab_" XSTR(channel) "_" XSTR(name) "_channel_" XSTR(unique) ")\n\t" /* channel string */ \
	119	_ASM_PTR "(__mstrtab_" XSTR(channel) "_" XSTR(name) "_name_" XSTR(unique) ")\n\t" /* name string */ \
	120	_ASM_PTR "(__mstrtab_" XSTR(channel) "_" XSTR(name) "_format_" XSTR(unique) ")\n\t" /* format string */ \
6793a8bf PMF	121	".byte 0\n\t" /* state imv */ \
	122	".byte 0\n\t" /* ptype */ \
	123	".word 0\n\t" /* channel_id */ \
	124	".word 0\n\t" /* event_id */ \
	125	".align " XSTR(__SIZEOF_POINTER__) "\n\t" /* alignment */ \
	126	_ASM_PTR "(marker_probe_cb)\n\t" /* call */ \
6b68d79d	127	_ASM_PTR "(__mark_empty_function)\n\t" /* marker_probe_closure single.field1 */ \
6793a8bf PMF	128	_ASM_PTR "0\n\t" /* marker_probe_closure single.field2 */ \
	129	_ASM_PTR "0\n\t" /* marker_probe_closure multi / \
	130	_ASM_PTR "0\n\t" /* tp_name */ \
	131	_ASM_PTR "0\n\t" /* tp_cb */ \
	132	"__mark_location_" XSTR(unique) ":\n\t" \
	133	_ASM_PTR "(1f)\n\t" /* location */ \
	134	".previous\n\t" \
	135	"1:\n\t" \
	136	); \
a4db742a	137	asm volatile ( \
6b68d79d PMF	138	"mov ""$__mark_struct_" XSTR(unique) ", %[pmark_struct]\n\t" \
6b68d79d PMF	139	: [pmark_struct] "=r" (__pmark_##channel##_##name) :: "memory" \
a4db742a PMF	140	); \
a4db742a PMF	141	\
3ea1e2fc PMF	142	save_registers(&regs)
	143
	144
a72ca31a	145	#define DEFINE_MARKER(channel, name, format) \
a4db742a	146	_DEFINE_MARKER(channel, name, NULL, NULL, format, __COUNTER__)
a72ca31a PMF	147
a72ca31a PMF	148	#define DEFINE_MARKER_TP(channel, name, tp_name, tp_cb, format) \
a4db742a	149	_DEFINE_MARKER(channel, name, #tp_name, tp_cb, format, __COUNTER__)
a72ca31a PMF	150
	151	/*
	152	* Make sure the alignment of the structure in the __markers section will
	153	* not add unwanted padding between the beginning of the section and the
	154	* structure. Force alignment to the same alignment as the section start.
	155	*
	156	* The "generic" argument controls which marker enabling mechanism must be used.
	157	* If generic is true, a variable read is used.
	158	* If generic is false, immediate values are used.
	159	*/
	160	#define __trace_mark(generic, channel, name, call_private, format, args...) \
	161	do { \
	162	DEFINE_MARKER(channel, name, format); \
	163	__mark_check_format(format, ## args); \
	164	if (!generic) { \
	165	if (unlikely(imv_read( \
a4db742a PMF	166	__pmark_##channel##_##name->state))) \
	167	(*__pmark_##channel##_##name->call) \
	168	(__pmark_##channel##_##name, \
75667d04	169	call_private, &regs, ## args); \
a72ca31a PMF	170	} else { \
a72ca31a PMF	171	if (unlikely(_imv_read( \
a4db742a PMF	172	__pmark_##channel##_##name->state))) \
	173	(__pmark_##channel##_##name->call) \
	174	(__pmark_##channel##_##name, \
75667d04	175	call_private, &regs, ## args); \
a72ca31a PMF	176	} \
	177	} while (0)
	178
	179	#define __trace_mark_tp(channel, name, call_private, tp_name, tp_cb, \
	180	format, args...) \
	181	do { \
	182	void __check_tp_type(void) \
	183	{ \
	184	register_trace_##tp_name(tp_cb); \
	185	} \
	186	DEFINE_MARKER_TP(channel, name, tp_name, tp_cb, format);\
	187	__mark_check_format(format, ## args); \
	188	(*__mark_##channel##_##name.call)(&__mark_##channel##_##name, \
75667d04	189	call_private, &regs, ## args); \
a72ca31a PMF	190	} while (0)
	191
	192	extern void marker_update_probe_range(struct marker *begin,
	193	struct marker *end);
	194
	195	#define GET_MARKER(channel, name) (__mark_##channel##_##name)
	196
872037bb PMF	197	#else /* !CONFIG_MARKERS */
	198	#define DEFINE_MARKER(channel, name, tp_name, tp_cb, format)
	199	#define __trace_mark(generic, channel, name, call_private, format, args...) \
	200	__mark_check_format(format, ## args)
	201	#define __trace_mark_tp(channel, name, call_private, tp_name, tp_cb, \
	202	format, args...) \
	203	do { \
	204	void __check_tp_type(void) \
	205	{ \
	206	register_trace_##tp_name(tp_cb); \
	207	} \
	208	__mark_check_format(format, ## args); \
	209	} while (0)
	210	static inline void marker_update_probe_range(struct marker *begin,
	211	struct marker *end)
	212	{ }
	213	#define GET_MARKER(channel, name)
	214	#endif /* CONFIG_MARKERS */
a72ca31a PMF	215
	216	/**
	217	* trace_mark - Marker using code patching
	218	* @channel: marker channel (where to send the data), not quoted.
	219	* @name: marker name, not quoted.
	220	* @format: format string
	221	* @args...: variable argument list
	222	*
	223	* Places a marker using optimized code patching technique (imv_read())
	224	* to be enabled when immediate values are present.
	225	*/
	226	#define trace_mark(channel, name, format, args...) \
	227	__trace_mark(0, channel, name, NULL, format, ## args)
	228
	229	/**
	230	* _trace_mark - Marker using variable read
	231	* @channel: marker channel (where to send the data), not quoted.
	232	* @name: marker name, not quoted.
	233	* @format: format string
	234	* @args...: variable argument list
	235	*
	236	* Places a marker using a standard memory read (_imv_read()) to be
	237	* enabled. Should be used for markers in code paths where instruction
	238	* modification based enabling is not welcome. (__init and __exit functions,
	239	* lockdep, some traps, printk).
	240	*/
	241	#define _trace_mark(channel, name, format, args...) \
	242	__trace_mark(1, channel, name, NULL, format, ## args)
	243
	244	/**
	245	* trace_mark_tp - Marker in a tracepoint callback
	246	* @channel: marker channel (where to send the data), not quoted.
	247	* @name: marker name, not quoted.
	248	* @tp_name: tracepoint name, not quoted.
	249	* @tp_cb: tracepoint callback. Should have an associated global symbol so it
	250	* is not optimized away by the compiler (should not be static).
	251	* @format: format string
	252	* @args...: variable argument list
	253	*
	254	* Places a marker in a tracepoint callback.
	255	*/
	256	#define trace_mark_tp(channel, name, tp_name, tp_cb, format, args...) \
	257	__trace_mark_tp(channel, name, NULL, tp_name, tp_cb, format, ## args)
	258
	259	/**
	260	* MARK_NOARGS - Format string for a marker with no argument.
	261	*/
	262	#define MARK_NOARGS " "
	263
	264	extern void lock_markers(void);
	265	extern void unlock_markers(void);
	266
	267	extern void markers_compact_event_ids(void);
	268
	269	/* To be used for string format validity checking with gcc */
	270	static inline void __printf(1, 2) ___mark_check_format(const char *fmt, ...)
	271	{
	272	}
	273
	274	#define __mark_check_format(format, args...) \
	275	do { \
	276	if (0) \
	277	___mark_check_format(format, ## args); \
	278	} while (0)
279
280	extern marker_probe_func __mark_empty_function;
281
282	extern void marker_probe_cb(const struct marker *mdata,
75667d04	283	void call_private, struct registers regs, ...);
a72ca31a PMF	284
	285	/*
	286	* Connect a probe to a marker.
	287	* private data pointer must be a valid allocated memory address, or NULL.
	288	*/
	289	extern int marker_probe_register(const char channel, const char name,
	290	const char format, marker_probe_func probe, void *probe_private);
	291
	292	/*
	293	* Returns the private data given to marker_probe_register.
	294	*/
	295	extern int marker_probe_unregister(const char channel, const char name,
	296	marker_probe_func probe, void probe_private);
	297	/*
	298	* Unregister a marker by providing the registered private data.
	299	*/
	300	extern int marker_probe_unregister_private_data(marker_probe_func *probe,
	301	void *probe_private);
	302
	303	extern void marker_get_private_data(const char channel, const char *name,
	304	marker_probe_func *probe, int num);
	305
	306	/*
	307	* marker_synchronize_unregister must be called between the last marker probe
	308	* unregistration and the first one of
	309	* - the end of module exit function
	310	* - the free of any resource used by the probes
	311	* to ensure the code and data are valid for any possibly running probes.
	312	*/
	313	#define marker_synchronize_unregister() synchronize_sched()
	314
	315	struct marker_iter {
98963de4 PMF	316	//ust// struct module *module;
98963de4 PMF	317	struct lib *lib;
a72ca31a PMF	318	struct marker *marker;
	319	};
	320
	321	extern void marker_iter_start(struct marker_iter *iter);
	322	extern void marker_iter_next(struct marker_iter *iter);
	323	extern void marker_iter_stop(struct marker_iter *iter);
	324	extern void marker_iter_reset(struct marker_iter *iter);
	325	extern int marker_get_iter_range(struct marker *marker, struct marker begin,
	326	struct marker *end);
	327
	328	extern void marker_update_process(void);
	329	extern int is_marker_enabled(const char channel, const char name);
	330
59b161cd PMF	331	//ust// #ifdef CONFIG_MARKERS_USERSPACE
	332	//ust// extern void exit_user_markers(struct task_struct *p);
	333	//ust// #else
	334	//ust// static inline void exit_user_markers(struct task_struct *p)
	335	//ust// {
	336	//ust// }
	337	//ust// #endif
a72ca31a	338
3ea1e2fc PMF	339	struct marker_addr {
	340	struct marker *marker;
	341	void *addr;
	342	};
98963de4 PMF	343
	344	struct lib {
	345	struct marker *markers_start;
defa46a7	346	#ifdef CONFIG_UST_GDB_INTEGRATION
3ea1e2fc	347	struct marker_addr *markers_addr_start;
defa46a7	348	#endif
98963de4 PMF	349	int markers_count;
	350	struct list_head list;
	351	};
	352
bf961c7e	353	extern int marker_register_lib(struct marker *markers_start, int markers_count);
defa46a7	354
55994a67 JB	355	#define MARKER_LIB \
	356	extern struct marker __start___markers[] __attribute__((weak, visibility("hidden"))); \
	357	extern struct marker __stop___markers[] __attribute__((weak, visibility("hidden"))); \
55994a67 JB	358	\
	359	static void __attribute__((constructor)) __markers__init(void) \
	360	{ \
bf961c7e	361	marker_register_lib(__start___markers, (((long)__stop___markers)-((long)__start___markers))/sizeof(struct marker)); \
55994a67	362	}
98963de4	363
064842c6 PMF	364	extern void marker_set_new_marker_cb(void (cb)(struct marker ));
064842c6 PMF	365	extern void init_markers(void);
9160b4e4	366
defa46a7	367	#endif /* _UST_MARKER_H */