/* * 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 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 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(void);					\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(void)					\{									\	struct ftrace_event_call *event_call = &event_##call;		\	struct args field;						\	int ret;							\									\	__common_field(unsigned char, type, 0);				\	__common_field(unsigned char, flags, 0);			\	__common_field(unsigned char, preempt_count, 0);		\	__common_field(int, pid, 1);					\	__common_field(int, tgid, 1);					\									\	tstruct;							\									\	return ret;							\} #undef TRACE_EVENT_FORMAT_NOFILTER#define TRACE_EVENT_FORMAT_NOFILTER(call, proto, args, fmt, tstruct,	\				    tpfmt) #include "trace_event_types.h"