[mirror_ubuntu-bionic-kernel.git] / kernel / trace / trace_export.c

/*
 * trace_export.c - export basic ftrace utilities to user space
 *
 * Copyright (C) 2009 Steven Rostedt <srostedt@redhat.com>
 */
#include <linux/stringify.h>
#include <linux/kallsyms.h>
#include <linux/seq_file.h>
#include <linux/debugfs.h>
#include <linux/uaccess.h>
#include <linux/ftrace.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/fs.h>

#include "trace_output.h"


#undef TRACE_STRUCT
#define TRACE_STRUCT(args...) args

extern void __bad_type_size(void);

#undef TRACE_FIELD
#define TRACE_FIELD(type, item, assign)					\
	if (sizeof(type) != sizeof(field.item))				\
		__bad_type_size();					\
	ret = trace_seq_printf(s, "\tfield:" #type " " #item ";\t"	\
			       "offset:%u;\tsize:%u;\n",		\
			       (unsigned int)offsetof(typeof(field), item), \
			       (unsigned int)sizeof(field.item));	\
	if (!ret)							\
		return 0;


#undef TRACE_FIELD_SPECIAL
#define TRACE_FIELD_SPECIAL(type_item, item, len, cmd)			\
	ret = trace_seq_printf(s, "\tfield special:" #type_item ";\t"	\
			       "offset:%u;\tsize:%u;\n",		\
			       (unsigned int)offsetof(typeof(field), item), \
			       (unsigned int)sizeof(field.item));	\
	if (!ret)							\
		return 0;

#undef TRACE_FIELD_ZERO_CHAR
#define TRACE_FIELD_ZERO_CHAR(item)					\
	ret = trace_seq_printf(s, "\tfield:char " #item ";\t"		\
			       "offset:%u;\tsize:0;\n",			\
			       (unsigned int)offsetof(typeof(field), item)); \
	if (!ret)							\
		return 0;

#undef TRACE_FIELD_SIGN
#define TRACE_FIELD_SIGN(type, item, assign, is_signed)	\
	TRACE_FIELD(type, item, assign)

#undef TP_RAW_FMT
#define TP_RAW_FMT(args...) args

#undef TRACE_EVENT_FORMAT
#define TRACE_EVENT_FORMAT(call, proto, args, fmt, tstruct, tpfmt)	\
static int								\
ftrace_format_##call(struct ftrace_event_call *unused,			\
		      struct trace_seq *s)				\
{									\
	struct args field;						\
	int ret;							\
									\
	tstruct;							\
									\
	trace_seq_printf(s, "\nprint fmt: \"%s\"\n", tpfmt);		\
									\
	return ret;							\
}

#undef TRACE_EVENT_FORMAT_NOFILTER
#define TRACE_EVENT_FORMAT_NOFILTER(call, proto, args, fmt, tstruct,	\
				    tpfmt)				\
static int								\
ftrace_format_##call(struct ftrace_event_call *unused,			\
		      struct trace_seq *s)				\
{									\
	struct args field;						\
	int ret;							\
									\
	tstruct;							\
									\
	trace_seq_printf(s, "\nprint fmt: \"%s\"\n", tpfmt);		\
									\
	return ret;							\
}

#include "trace_event_types.h"

#undef TRACE_ZERO_CHAR
#define TRACE_ZERO_CHAR(arg)

#undef TRACE_FIELD
#define TRACE_FIELD(type, item, assign)\
	entry->item = assign;

#undef TRACE_FIELD
#define TRACE_FIELD(type, item, assign)\
	entry->item = assign;

#undef TRACE_FIELD_SIGN
#define TRACE_FIELD_SIGN(type, item, assign, is_signed)	\
	TRACE_FIELD(type, item, assign)

#undef TP_CMD
#define TP_CMD(cmd...)	cmd

#undef TRACE_ENTRY
#define TRACE_ENTRY	entry

#undef TRACE_FIELD_SPECIAL
#define TRACE_FIELD_SPECIAL(type_item, item, len, cmd)	\
	cmd;

#undef TRACE_EVENT_FORMAT
#define TRACE_EVENT_FORMAT(call, proto, args, fmt, tstruct, tpfmt)	\
int ftrace_define_fields_##call(struct ftrace_event_call *event_call);	\
static int ftrace_raw_init_event_##call(void);				\
									\
struct ftrace_event_call __used						\
__attribute__((__aligned__(4)))						\
__attribute__((section("_ftrace_events"))) event_##call = {		\
	.name			= #call,				\
	.id			= proto,				\
	.system			= __stringify(TRACE_SYSTEM),		\
	.raw_init		= ftrace_raw_init_event_##call,		\
	.show_format		= ftrace_format_##call,			\
	.define_fields		= ftrace_define_fields_##call,		\
};									\
static int ftrace_raw_init_event_##call(void)				\
{									\
	INIT_LIST_HEAD(&event_##call.fields);				\
	init_preds(&event_##call);					\
	return 0;							\
}									\

#undef TRACE_EVENT_FORMAT_NOFILTER
#define TRACE_EVENT_FORMAT_NOFILTER(call, proto, args, fmt, tstruct,	\
				    tpfmt)				\
									\
struct ftrace_event_call __used						\
__attribute__((__aligned__(4)))						\
__attribute__((section("_ftrace_events"))) event_##call = {		\
	.name			= #call,				\
	.id			= proto,				\
	.system			= __stringify(TRACE_SYSTEM),		\
	.show_format		= ftrace_format_##call,			\
};

#include "trace_event_types.h"

#undef TRACE_FIELD
#define TRACE_FIELD(type, item, assign)					\
	ret = trace_define_field(event_call, #type, #item,		\
				 offsetof(typeof(field), item),		\
				 sizeof(field.item), is_signed_type(type));	\
	if (ret)							\
		return ret;

#undef TRACE_FIELD_SPECIAL
#define TRACE_FIELD_SPECIAL(type, item, len, cmd)			\
	ret = trace_define_field(event_call, #type "[" #len "]", #item,	\
				 offsetof(typeof(field), item),		\
				 sizeof(field.item), 0);		\
	if (ret)							\
		return ret;

#undef TRACE_FIELD_SIGN
#define TRACE_FIELD_SIGN(type, item, assign, is_signed)			\
	ret = trace_define_field(event_call, #type, #item,		\
				 offsetof(typeof(field), item),		\
				 sizeof(field.item), is_signed);	\
	if (ret)							\
		return ret;

#undef TRACE_FIELD_ZERO_CHAR
#define TRACE_FIELD_ZERO_CHAR(item)

#undef TRACE_EVENT_FORMAT
#define TRACE_EVENT_FORMAT(call, proto, args, fmt, tstruct, tpfmt)	\
int									\
ftrace_define_fields_##call(struct ftrace_event_call *event_call)	\
{									\
	struct args field;						\
	int ret;							\
									\
	ret = trace_define_common_fields(event_call);			\
	if (ret)							\
		return ret;						\
									\
	tstruct;							\
									\
	return ret;							\
}

#undef TRACE_EVENT_FORMAT_NOFILTER
#define TRACE_EVENT_FORMAT_NOFILTER(call, proto, args, fmt, tstruct,	\
				    tpfmt)

#include "trace_event_types.h"
Commit	Line	Data
770cb243 SR	1	/*
	2	* trace_export.c - export basic ftrace utilities to user space
	3	*
	4	* Copyright (C) 2009 Steven Rostedt <srostedt@redhat.com>
	5	*/
	6	#include <linux/stringify.h>
	7	#include <linux/kallsyms.h>
	8	#include <linux/seq_file.h>
	9	#include <linux/debugfs.h>
	10	#include <linux/uaccess.h>
	11	#include <linux/ftrace.h>
	12	#include <linux/module.h>
	13	#include <linux/init.h>
	14	#include <linux/fs.h>
	15
	16	#include "trace_output.h"
	17
da4d0302 SR	18
	19	#undef TRACE_STRUCT
	20	#define TRACE_STRUCT(args...) args
	21
75db37d2 SR	22	extern void __bad_type_size(void);
75db37d2 SR	23
da4d0302 SR	24	#undef TRACE_FIELD
da4d0302 SR	25	#define TRACE_FIELD(type, item, assign) \
75db37d2 SR	26	if (sizeof(type) != sizeof(field.item)) \
75db37d2 SR	27	__bad_type_size(); \
da4d0302 SR	28	ret = trace_seq_printf(s, "\tfield:" #type " " #item ";\t" \
	29	"offset:%u;\tsize:%u;\n", \
	30	(unsigned int)offsetof(typeof(field), item), \
	31	(unsigned int)sizeof(field.item)); \
	32	if (!ret) \
	33	return 0;
	34
	35
	36	#undef TRACE_FIELD_SPECIAL
e1112b4d	37	#define TRACE_FIELD_SPECIAL(type_item, item, len, cmd) \
da4d0302 SR	38	ret = trace_seq_printf(s, "\tfield special:" #type_item ";\t" \
	39	"offset:%u;\tsize:%u;\n", \
	40	(unsigned int)offsetof(typeof(field), item), \
	41	(unsigned int)sizeof(field.item)); \
	42	if (!ret) \
	43	return 0;
770cb243 SR	44
770cb243 SR	45	#undef TRACE_FIELD_ZERO_CHAR
156b5f17	46	#define TRACE_FIELD_ZERO_CHAR(item) \
1bbe2a83	47	ret = trace_seq_printf(s, "\tfield:char " #item ";\t" \
156b5f17 SR	48	"offset:%u;\tsize:0;\n", \
	49	(unsigned int)offsetof(typeof(field), item)); \
	50	if (!ret) \
770cb243 SR	51	return 0;
770cb243 SR	52
a118e4d1 TZ	53	#undef TRACE_FIELD_SIGN
	54	#define TRACE_FIELD_SIGN(type, item, assign, is_signed) \
	55	TRACE_FIELD(type, item, assign)
770cb243	56
2939b046 SR	57	#undef TP_RAW_FMT
2939b046 SR	58	#define TP_RAW_FMT(args...) args
770cb243 SR	59
	60	#undef TRACE_EVENT_FORMAT
	61	#define TRACE_EVENT_FORMAT(call, proto, args, fmt, tstruct, tpfmt) \
	62	static int \
e8f9f4d7 FW	63	ftrace_format_##call(struct ftrace_event_call *unused, \
e8f9f4d7 FW	64	struct trace_seq *s) \
770cb243 SR	65	{ \
	66	struct args field; \
	67	int ret; \
	68	\
	69	tstruct; \
	70	\
	71	trace_seq_printf(s, "\nprint fmt: \"%s\"\n", tpfmt); \
	72	\
	73	return ret; \
	74	}
	75
e45f2e2b TZ	76	#undef TRACE_EVENT_FORMAT_NOFILTER
	77	#define TRACE_EVENT_FORMAT_NOFILTER(call, proto, args, fmt, tstruct, \
	78	tpfmt) \
	79	static int \
e8f9f4d7 FW	80	ftrace_format_##call(struct ftrace_event_call *unused, \
e8f9f4d7 FW	81	struct trace_seq *s) \
e45f2e2b TZ	82	{ \
	83	struct args field; \
	84	int ret; \
	85	\
	86	tstruct; \
	87	\
	88	trace_seq_printf(s, "\nprint fmt: \"%s\"\n", tpfmt); \
	89	\
	90	return ret; \
	91	}
	92
770cb243 SR	93	#include "trace_event_types.h"
	94
	95	#undef TRACE_ZERO_CHAR
	96	#define TRACE_ZERO_CHAR(arg)
	97
	98	#undef TRACE_FIELD
	99	#define TRACE_FIELD(type, item, assign)\
	100	entry->item = assign;
	101
	102	#undef TRACE_FIELD
	103	#define TRACE_FIELD(type, item, assign)\
	104	entry->item = assign;
	105
a118e4d1 TZ	106	#undef TRACE_FIELD_SIGN
	107	#define TRACE_FIELD_SIGN(type, item, assign, is_signed) \
	108	TRACE_FIELD(type, item, assign)
	109
2939b046 SR	110	#undef TP_CMD
2939b046 SR	111	#define TP_CMD(cmd...) cmd
770cb243 SR	112
	113	#undef TRACE_ENTRY
	114	#define TRACE_ENTRY entry
	115
	116	#undef TRACE_FIELD_SPECIAL
e1112b4d	117	#define TRACE_FIELD_SPECIAL(type_item, item, len, cmd) \
770cb243 SR	118	cmd;
	119
	120	#undef TRACE_EVENT_FORMAT
	121	#define TRACE_EVENT_FORMAT(call, proto, args, fmt, tstruct, tpfmt) \
14be96c9	122	int ftrace_define_fields_##call(struct ftrace_event_call *event_call); \
e1112b4d	123	static int ftrace_raw_init_event_##call(void); \
770cb243	124	\
e1112b4d	125	struct ftrace_event_call __used \
770cb243 SR	126	__attribute__((__aligned__(4))) \
770cb243 SR	127	__attribute__((section("_ftrace_events"))) event_##call = { \
ef18012b	128	.name = #call, \
770cb243 SR	129	.id = proto, \
770cb243 SR	130	.system = __stringify(TRACE_SYSTEM), \
e1112b4d	131	.raw_init = ftrace_raw_init_event_##call, \
770cb243	132	.show_format = ftrace_format_##call, \
e1112b4d TZ	133	.define_fields = ftrace_define_fields_##call, \
	134	}; \
	135	static int ftrace_raw_init_event_##call(void) \
	136	{ \
	137	INIT_LIST_HEAD(&event_##call.fields); \
0a19e53c	138	init_preds(&event_##call); \
e1112b4d TZ	139	return 0; \
	140	} \
	141
e45f2e2b TZ	142	#undef TRACE_EVENT_FORMAT_NOFILTER
	143	#define TRACE_EVENT_FORMAT_NOFILTER(call, proto, args, fmt, tstruct, \
	144	tpfmt) \
	145	\
	146	struct ftrace_event_call __used \
	147	__attribute__((__aligned__(4))) \
	148	__attribute__((section("_ftrace_events"))) event_##call = { \
	149	.name = #call, \
	150	.id = proto, \
	151	.system = __stringify(TRACE_SYSTEM), \
	152	.show_format = ftrace_format_##call, \
	153	};
	154
e1112b4d TZ	155	#include "trace_event_types.h"
	156
	157	#undef TRACE_FIELD
	158	#define TRACE_FIELD(type, item, assign) \
	159	ret = trace_define_field(event_call, #type, #item, \
	160	offsetof(typeof(field), item), \
a118e4d1	161	sizeof(field.item), is_signed_type(type)); \
e1112b4d TZ	162	if (ret) \
	163	return ret;
	164
	165	#undef TRACE_FIELD_SPECIAL
	166	#define TRACE_FIELD_SPECIAL(type, item, len, cmd) \
	167	ret = trace_define_field(event_call, #type "[" #len "]", #item, \
	168	offsetof(typeof(field), item), \
a118e4d1 TZ	169	sizeof(field.item), 0); \
	170	if (ret) \
	171	return ret;
	172
	173	#undef TRACE_FIELD_SIGN
	174	#define TRACE_FIELD_SIGN(type, item, assign, is_signed) \
	175	ret = trace_define_field(event_call, #type, #item, \
	176	offsetof(typeof(field), item), \
	177	sizeof(field.item), is_signed); \
e1112b4d TZ	178	if (ret) \
	179	return ret;
	180
	181	#undef TRACE_FIELD_ZERO_CHAR
	182	#define TRACE_FIELD_ZERO_CHAR(item)
	183
	184	#undef TRACE_EVENT_FORMAT
	185	#define TRACE_EVENT_FORMAT(call, proto, args, fmt, tstruct, tpfmt) \
	186	int \
14be96c9	187	ftrace_define_fields_##call(struct ftrace_event_call *event_call) \
e1112b4d	188	{ \
e1112b4d TZ	189	struct args field; \
	190	int ret; \
	191	\
e647d6b3 LZ	192	ret = trace_define_common_fields(event_call); \
	193	if (ret) \
	194	return ret; \
e1112b4d TZ	195	\
	196	tstruct; \
	197	\
	198	return ret; \
770cb243	199	}
e1112b4d	200
e45f2e2b TZ	201	#undef TRACE_EVENT_FORMAT_NOFILTER
	202	#define TRACE_EVENT_FORMAT_NOFILTER(call, proto, args, fmt, tstruct, \
	203	tpfmt)
	204
770cb243	205	#include "trace_event_types.h"