[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 <urcu/list.h>
#include <ust/processor.h>

#include <bits/wordsize.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, m)			\
		struct registers 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_" XSTR(channel) "_" XSTR(name) "_channel_" XSTR(unique) "\n\t"	\
		     ".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 " "\"" format "\"" "\n\t"						\
		     ".previous\n\t"								\
		     ".endif\n\t"								\
		);										\
		asm volatile (									\
		     ".section __markers,\"aw\",@progbits\n\t"					\
		     ".align 8\n\t"								\
		     "2:\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(__WORDSIZE) " / 8\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 */						\
		     _ASM_PTR "(1f)\n\t" /* location */						\
		     ".previous\n\t"								\
		     "1:\n\t"									\
		     ARCH_COPY_ADDR("2b", "%[outptr]") "\n\t"					\
		: [outptr] "=r" (m) );								\
												\
		save_registers(&regs)


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

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

/*
 * 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...) \
	__trace_mark_counter(generic, channel, name, __LINE__, call_private, format, ## args)

#define __trace_mark_counter(generic, channel, name, unique, call_private, format, args...) \
	do {								\
		struct marker *m;					\
		DEFINE_MARKER(channel, name, format, unique, m);			\
		__mark_check_format(format, ## args);			\
		if (!generic) {						\
			if (unlikely(imv_read(m->state))) \
				(m->call)(m, call_private, &regs, ## args);		\
		} else {						\
			if (unlikely(_imv_read(m->state))) \
				(m->call)(m, call_private, &regs, ## args);		\
		}							\
	} while (0)

#define __trace_mark_tp(channel, name, call_private, tp_name, tp_cb, format, args...) \
	__trace_mark_tp_counter(channel, name, __LINE__, call_private, tp_name, tp_cb, format, ## args)

#define __trace_mark_tp_counter(channel, name, unique, call_private, tp_name, tp_cb, format, args...) \
	do {								\
		struct marker m;					\
		void __check_tp_type(void)				\
		{							\
			register_trace_##tp_name(tp_cb);		\
		}							\
		DEFINE_MARKER_TP(channel, name, tp_name, tp_cb, format, unique, m);\
		__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, m)
#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.
 */
#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>
22d9080d	32	#include <urcu/list.h>
2782fc4b	33	#include <ust/processor.h>
59b161cd	34
9389f19d PMF	35	#include <bits/wordsize.h>
9389f19d PMF	36
59b161cd PMF	37	//ust// struct module;
59b161cd PMF	38	//ust// struct task_struct;
a72ca31a PMF	39	struct marker;
a72ca31a PMF	40
a4db742a PMF	41	/* To stringify the expansion of a define */
	42	#define XSTR(d) STR(d)
	43	#define STR(s) #s
	44
a72ca31a PMF	45	/**
	46	* marker_probe_func - Type of a marker probe function
	47	* @mdata: marker data
	48	* @probe_private: probe private data
	49	* @call_private: call site private data
	50	* @fmt: format string
	51	* @args: variable argument list pointer. Use a pointer to overcome C's
	52	* inability to pass this around as a pointer in a portable manner in
	53	* the callee otherwise.
	54	*
	55	* Type of marker probe functions. They receive the mdata and need to parse the
	56	* format string to recover the variable argument list.
	57	*/
	58	typedef void marker_probe_func(const struct marker *mdata,
75667d04	59	void probe_private, struct registers regs, void *call_private,
a72ca31a PMF	60	const char fmt, va_list args);
	61
	62	struct marker_probe_closure {
	63	marker_probe_func func; / Callback */
	64	void probe_private; / Private probe data */
	65	};
	66
	67	struct marker {
	68	const char channel; / Name of channel where to send data */
	69	const char name; / Marker name */
	70	const char format; / Marker format string, describing the
	71	* variable argument list.
	72	*/
59b161cd	73	DEFINE_IMV(char, state);/* Immediate value state. */
a72ca31a PMF	74	char ptype; /* probe type : 0 : single, 1 : multi */
	75	/* Probe wrapper */
	76	u16 channel_id; /* Numeric channel identifier, dynamic */
	77	u16 event_id; /* Numeric event identifier, dynamic */
75667d04	78	void (call)(const struct marker mdata, void call_private, struct registers regs, ...);
a72ca31a PMF	79	struct marker_probe_closure single;
	80	struct marker_probe_closure *multi;
	81	const char tp_name; / Optional tracepoint name */
	82	void tp_cb; / Optional tracepoint callback */
3ea1e2fc	83	void location; / Address of marker in code */
a72ca31a PMF	84	} __attribute__((aligned(8)));
a72ca31a PMF	85
872037bb PMF	86	#define CONFIG_MARKERS
872037bb PMF	87	#ifdef CONFIG_MARKERS
a72ca31a	88
9692fa18	89	#define _DEFINE_MARKER(channel, name, tp_name_str, tp_cb, format, unique, m) \
bb9ade29	90	struct registers regs; \
bb9ade29	91	\
a4db742a	92	/* This next asm has to be a basic inline asm (no input/output/clobber), \
9692fa18 PMF	93	* because it must not require %-sign escaping, as we most certainly \
	94	* have some %-signs in the format string. \
	95	*/ \
a4db742a	96	asm volatile ( \
9692fa18 PMF	97	/* We only define these symbols if they have not yet been defined. Indeed, \
	98	* if two markers with the same channel/name are on the same line, they \
	99	* will try to create the same symbols, resulting in a conflict. This \
	100	* is not unusual as it can be the result of function inlining. \
	101	*/ \
	102	".ifndef __mstrtab_" XSTR(channel) "_" XSTR(name) "_channel_" XSTR(unique) "\n\t" \
a4db742a	103	".section __markers_strings,\"aw\",@progbits\n\t" \
a4db742a PMF	104	"__mstrtab_" XSTR(channel) "_" XSTR(name) "_channel_" XSTR(unique) ":\n\t" \
	105	".string \"" XSTR(channel) "\"\n\t" \
	106	"__mstrtab_" XSTR(channel) "_" XSTR(name) "_name_" XSTR(unique) ":\n\t" \
	107	".string \"" XSTR(name) "\"\n\t" \
	108	"__mstrtab_" XSTR(channel) "_" XSTR(name) "_format_" XSTR(unique) ":\n\t" \
c6794136	109	".string " "\"" format "\"" "\n\t" \
a4db742a	110	".previous\n\t" \
9692fa18 PMF	111	".endif\n\t" \
	112	); \
	113	asm volatile ( \
a4db742a PMF	114	".section __markers,\"aw\",@progbits\n\t" \
a4db742a PMF	115	".align 8\n\t" \
9692fa18	116	"2:\n\t" \
6b68d79d PMF	117	_ASM_PTR "(__mstrtab_" XSTR(channel) "_" XSTR(name) "_channel_" XSTR(unique) ")\n\t" /* channel string */ \
	118	_ASM_PTR "(__mstrtab_" XSTR(channel) "_" XSTR(name) "_name_" XSTR(unique) ")\n\t" /* name string */ \
	119	_ASM_PTR "(__mstrtab_" XSTR(channel) "_" XSTR(name) "_format_" XSTR(unique) ")\n\t" /* format string */ \
6793a8bf PMF	120	".byte 0\n\t" /* state imv */ \
	121	".byte 0\n\t" /* ptype */ \
	122	".word 0\n\t" /* channel_id */ \
	123	".word 0\n\t" /* event_id */ \
9389f19d	124	".align " XSTR(__WORDSIZE) " / 8\n\t" /* alignment */ \
6793a8bf	125	_ASM_PTR "(marker_probe_cb)\n\t" /* call */ \
6b68d79d	126	_ASM_PTR "(__mark_empty_function)\n\t" /* marker_probe_closure single.field1 */ \
6793a8bf PMF	127	_ASM_PTR "0\n\t" /* marker_probe_closure single.field2 */ \
	128	_ASM_PTR "0\n\t" /* marker_probe_closure multi / \
	129	_ASM_PTR "0\n\t" /* tp_name */ \
	130	_ASM_PTR "0\n\t" /* tp_cb */ \
6793a8bf PMF	131	_ASM_PTR "(1f)\n\t" /* location */ \
	132	".previous\n\t" \
	133	"1:\n\t" \
9692fa18 PMF	134	ARCH_COPY_ADDR("2b", "%[outptr]") "\n\t" \
9692fa18 PMF	135	: [outptr] "=r" (m) ); \
bb9ade29	136	\
3ea1e2fc PMF	137	save_registers(&regs)
	138
	139
9692fa18 PMF	140	#define DEFINE_MARKER(channel, name, format, unique, m) \
9692fa18 PMF	141	_DEFINE_MARKER(channel, name, NULL, NULL, format, unique, m)
a72ca31a	142
9692fa18 PMF	143	#define DEFINE_MARKER_TP(channel, name, tp_name, tp_cb, format, unique, m) \
9692fa18 PMF	144	_DEFINE_MARKER(channel, name, #tp_name, tp_cb, format, unique, m)
a72ca31a PMF	145
	146	/*
	147	* Make sure the alignment of the structure in the __markers section will
	148	* not add unwanted padding between the beginning of the section and the
	149	* structure. Force alignment to the same alignment as the section start.
	150	*
	151	* The "generic" argument controls which marker enabling mechanism must be used.
	152	* If generic is true, a variable read is used.
	153	* If generic is false, immediate values are used.
	154	*/
bb9ade29	155
a72ca31a	156	#define __trace_mark(generic, channel, name, call_private, format, args...) \
e05cba90	157	__trace_mark_counter(generic, channel, name, __LINE__, call_private, format, ## args)
bb9ade29 PMF	158
bb9ade29 PMF	159	#define __trace_mark_counter(generic, channel, name, unique, call_private, format, args...) \
a72ca31a	160	do { \
9692fa18 PMF	161	struct marker *m; \
9692fa18 PMF	162	DEFINE_MARKER(channel, name, format, unique, m); \
a72ca31a PMF	163	__mark_check_format(format, ## args); \
a72ca31a PMF	164	if (!generic) { \
9692fa18 PMF	165	if (unlikely(imv_read(m->state))) \
9692fa18 PMF	166	(m->call)(m, call_private, &regs, ## args); \
a72ca31a	167	} else { \
9692fa18 PMF	168	if (unlikely(_imv_read(m->state))) \
9692fa18 PMF	169	(m->call)(m, call_private, &regs, ## args); \
a72ca31a PMF	170	} \
	171	} while (0)
	172
bb9ade29	173	#define __trace_mark_tp(channel, name, call_private, tp_name, tp_cb, format, args...) \
e05cba90	174	__trace_mark_tp_counter(channel, name, __LINE__, call_private, tp_name, tp_cb, format, ## args)
bb9ade29 PMF	175
bb9ade29 PMF	176	#define __trace_mark_tp_counter(channel, name, unique, call_private, tp_name, tp_cb, format, args...) \
a72ca31a	177	do { \
9692fa18	178	struct marker m; \
a72ca31a PMF	179	void __check_tp_type(void) \
	180	{ \
	181	register_trace_##tp_name(tp_cb); \
	182	} \
9692fa18	183	DEFINE_MARKER_TP(channel, name, tp_name, tp_cb, format, unique, m);\
a72ca31a PMF	184	__mark_check_format(format, ## args); \
a72ca31a PMF	185	(*__mark_##channel##_##name.call)(&__mark_##channel##_##name, \
75667d04	186	call_private, &regs, ## args); \
a72ca31a PMF	187	} while (0)
	188
	189	extern void marker_update_probe_range(struct marker *begin,
	190	struct marker *end);
	191
	192	#define GET_MARKER(channel, name) (__mark_##channel##_##name)
	193
872037bb	194	#else /* !CONFIG_MARKERS */
9692fa18	195	#define DEFINE_MARKER(channel, name, tp_name, tp_cb, format, m)
872037bb PMF	196	#define __trace_mark(generic, channel, name, call_private, format, args...) \
	197	__mark_check_format(format, ## args)
	198	#define __trace_mark_tp(channel, name, call_private, tp_name, tp_cb, \
	199	format, args...) \
	200	do { \
	201	void __check_tp_type(void) \
	202	{ \
	203	register_trace_##tp_name(tp_cb); \
	204	} \
	205	__mark_check_format(format, ## args); \
	206	} while (0)
	207	static inline void marker_update_probe_range(struct marker *begin,
	208	struct marker *end)
	209	{ }
	210	#define GET_MARKER(channel, name)
	211	#endif /* CONFIG_MARKERS */
a72ca31a PMF	212
	213	/**
	214	* trace_mark - Marker using code patching
	215	* @channel: marker channel (where to send the data), not quoted.
	216	* @name: marker name, not quoted.
	217	* @format: format string
	218	* @args...: variable argument list
	219	*
	220	* Places a marker using optimized code patching technique (imv_read())
	221	* to be enabled when immediate values are present.
	222	*/
	223	#define trace_mark(channel, name, format, args...) \
	224	__trace_mark(0, channel, name, NULL, format, ## args)
	225
	226	/**
	227	* _trace_mark - Marker using variable read
	228	* @channel: marker channel (where to send the data), not quoted.
	229	* @name: marker name, not quoted.
	230	* @format: format string
	231	* @args...: variable argument list
	232	*
	233	* Places a marker using a standard memory read (_imv_read()) to be
	234	* enabled. Should be used for markers in code paths where instruction
c1f20530	235	* modification based enabling is not welcome.
a72ca31a PMF	236	*/
	237	#define _trace_mark(channel, name, format, args...) \
	238	__trace_mark(1, channel, name, NULL, format, ## args)
	239
	240	/**
	241	* trace_mark_tp - Marker in a tracepoint callback
	242	* @channel: marker channel (where to send the data), not quoted.
	243	* @name: marker name, not quoted.
	244	* @tp_name: tracepoint name, not quoted.
	245	* @tp_cb: tracepoint callback. Should have an associated global symbol so it
	246	* is not optimized away by the compiler (should not be static).
	247	* @format: format string
	248	* @args...: variable argument list
	249	*
	250	* Places a marker in a tracepoint callback.
	251	*/
	252	#define trace_mark_tp(channel, name, tp_name, tp_cb, format, args...) \
	253	__trace_mark_tp(channel, name, NULL, tp_name, tp_cb, format, ## args)
	254
	255	/**
	256	* MARK_NOARGS - Format string for a marker with no argument.
	257	*/
	258	#define MARK_NOARGS " "
	259
	260	extern void lock_markers(void);
	261	extern void unlock_markers(void);
	262
	263	extern void markers_compact_event_ids(void);
	264
	265	/* To be used for string format validity checking with gcc */
	266	static inline void __printf(1, 2) ___mark_check_format(const char *fmt, ...)
	267	{
	268	}
	269
	270	#define __mark_check_format(format, args...) \
	271	do { \
	272	if (0) \
	273	___mark_check_format(format, ## args); \
	274	} while (0)
	275
	276	extern marker_probe_func __mark_empty_function;
	277
	278	extern void marker_probe_cb(const struct marker *mdata,
75667d04	279	void call_private, struct registers regs, ...);
a72ca31a PMF	280
	281	/*
	282	* Connect a probe to a marker.
	283	* private data pointer must be a valid allocated memory address, or NULL.
	284	*/
	285	extern int marker_probe_register(const char channel, const char name,
	286	const char format, marker_probe_func probe, void *probe_private);
	287
	288	/*
	289	* Returns the private data given to marker_probe_register.
	290	*/
	291	extern int marker_probe_unregister(const char channel, const char name,
	292	marker_probe_func probe, void probe_private);
	293	/*
	294	* Unregister a marker by providing the registered private data.
	295	*/
	296	extern int marker_probe_unregister_private_data(marker_probe_func *probe,
	297	void *probe_private);
	298
	299	extern void marker_get_private_data(const char channel, const char *name,
	300	marker_probe_func *probe, int num);
	301
	302	/*
	303	* marker_synchronize_unregister must be called between the last marker probe
	304	* unregistration and the first one of
	305	* - the end of module exit function
	306	* - the free of any resource used by the probes
	307	* to ensure the code and data are valid for any possibly running probes.
	308	*/
	309	#define marker_synchronize_unregister() synchronize_sched()
	310
	311	struct marker_iter {
98963de4 PMF	312	//ust// struct module *module;
98963de4 PMF	313	struct lib *lib;
a72ca31a PMF	314	struct marker *marker;
	315	};
	316
	317	extern void marker_iter_start(struct marker_iter *iter);
	318	extern void marker_iter_next(struct marker_iter *iter);
	319	extern void marker_iter_stop(struct marker_iter *iter);
	320	extern void marker_iter_reset(struct marker_iter *iter);
	321	extern int marker_get_iter_range(struct marker *marker, struct marker begin,
	322	struct marker *end);
	323
	324	extern void marker_update_process(void);
	325	extern int is_marker_enabled(const char channel, const char name);
	326
59b161cd PMF	327	//ust// #ifdef CONFIG_MARKERS_USERSPACE
	328	//ust// extern void exit_user_markers(struct task_struct *p);
	329	//ust// #else
	330	//ust// static inline void exit_user_markers(struct task_struct *p)
	331	//ust// {
	332	//ust// }
	333	//ust// #endif
a72ca31a	334
3ea1e2fc PMF	335	struct marker_addr {
	336	struct marker *marker;
	337	void *addr;
	338	};
98963de4 PMF	339
	340	struct lib {
	341	struct marker *markers_start;
defa46a7	342	#ifdef CONFIG_UST_GDB_INTEGRATION
3ea1e2fc	343	struct marker_addr *markers_addr_start;
defa46a7	344	#endif
98963de4 PMF	345	int markers_count;
	346	struct list_head list;
	347	};
	348
bf961c7e	349	extern int marker_register_lib(struct marker *markers_start, int markers_count);
defa46a7	350
55994a67 JB	351	#define MARKER_LIB \
	352	extern struct marker __start___markers[] __attribute__((weak, visibility("hidden"))); \
	353	extern struct marker __stop___markers[] __attribute__((weak, visibility("hidden"))); \
55994a67 JB	354	\
	355	static void __attribute__((constructor)) __markers__init(void) \
	356	{ \
bf961c7e	357	marker_register_lib(__start___markers, (((long)__stop___markers)-((long)__start___markers))/sizeof(struct marker)); \
55994a67	358	}
98963de4	359
064842c6 PMF	360	extern void marker_set_new_marker_cb(void (cb)(struct marker ));
064842c6 PMF	361	extern void init_markers(void);
9160b4e4	362
defa46a7	363	#endif /* _UST_MARKER_H */