170 строки
4.2 KiB
C
170 строки
4.2 KiB
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_SYSTEM
|
|
#define TRACE_SYSTEM ftrace
|
|
|
|
/* not needed for this file */
|
|
#undef __field_struct
|
|
#define __field_struct(type, item)
|
|
|
|
#undef __field
|
|
#define __field(type, item) type item;
|
|
|
|
#undef __field_desc
|
|
#define __field_desc(type, container, item) type item;
|
|
|
|
#undef __array
|
|
#define __array(type, item, size) type item[size];
|
|
|
|
#undef __array_desc
|
|
#define __array_desc(type, container, item, size) type item[size];
|
|
|
|
#undef __dynamic_array
|
|
#define __dynamic_array(type, item) type item[];
|
|
|
|
#undef F_STRUCT
|
|
#define F_STRUCT(args...) args
|
|
|
|
#undef F_printk
|
|
#define F_printk(fmt, args...) fmt, args
|
|
|
|
#undef FTRACE_ENTRY
|
|
#define FTRACE_ENTRY(name, struct_name, id, tstruct, print) \
|
|
struct ____ftrace_##name { \
|
|
tstruct \
|
|
}; \
|
|
static void __always_unused ____ftrace_check_##name(void) \
|
|
{ \
|
|
struct ____ftrace_##name *__entry = NULL; \
|
|
\
|
|
/* force compile-time check on F_printk() */ \
|
|
printk(print); \
|
|
}
|
|
|
|
#undef FTRACE_ENTRY_DUP
|
|
#define FTRACE_ENTRY_DUP(name, struct_name, id, tstruct, print) \
|
|
FTRACE_ENTRY(name, struct_name, id, PARAMS(tstruct), PARAMS(print))
|
|
|
|
#include "trace_entries.h"
|
|
|
|
#undef __field
|
|
#define __field(type, item) \
|
|
ret = trace_define_field(event_call, #type, #item, \
|
|
offsetof(typeof(field), item), \
|
|
sizeof(field.item), \
|
|
is_signed_type(type), FILTER_OTHER); \
|
|
if (ret) \
|
|
return ret;
|
|
|
|
#undef __field_desc
|
|
#define __field_desc(type, container, item) \
|
|
ret = trace_define_field(event_call, #type, #item, \
|
|
offsetof(typeof(field), \
|
|
container.item), \
|
|
sizeof(field.container.item), \
|
|
is_signed_type(type), FILTER_OTHER); \
|
|
if (ret) \
|
|
return ret;
|
|
|
|
#undef __array
|
|
#define __array(type, item, len) \
|
|
BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \
|
|
ret = trace_define_field(event_call, #type "[" #len "]", #item, \
|
|
offsetof(typeof(field), item), \
|
|
sizeof(field.item), \
|
|
is_signed_type(type), FILTER_OTHER); \
|
|
if (ret) \
|
|
return ret;
|
|
|
|
#undef __array_desc
|
|
#define __array_desc(type, container, item, len) \
|
|
BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \
|
|
ret = trace_define_field(event_call, #type "[" #len "]", #item, \
|
|
offsetof(typeof(field), \
|
|
container.item), \
|
|
sizeof(field.container.item), \
|
|
is_signed_type(type), FILTER_OTHER); \
|
|
if (ret) \
|
|
return ret;
|
|
|
|
#undef __dynamic_array
|
|
#define __dynamic_array(type, item) \
|
|
ret = trace_define_field(event_call, #type, #item, \
|
|
offsetof(typeof(field), item), \
|
|
0, is_signed_type(type), FILTER_OTHER);\
|
|
if (ret) \
|
|
return ret;
|
|
|
|
#undef FTRACE_ENTRY
|
|
#define FTRACE_ENTRY(name, struct_name, id, tstruct, print) \
|
|
int \
|
|
ftrace_define_fields_##name(struct ftrace_event_call *event_call) \
|
|
{ \
|
|
struct struct_name field; \
|
|
int ret; \
|
|
\
|
|
tstruct; \
|
|
\
|
|
return ret; \
|
|
}
|
|
|
|
#include "trace_entries.h"
|
|
|
|
static int ftrace_raw_init_event(struct ftrace_event_call *call)
|
|
{
|
|
INIT_LIST_HEAD(&call->fields);
|
|
return 0;
|
|
}
|
|
|
|
#undef __entry
|
|
#define __entry REC
|
|
|
|
#undef __field
|
|
#define __field(type, item)
|
|
|
|
#undef __field_desc
|
|
#define __field_desc(type, container, item)
|
|
|
|
#undef __array
|
|
#define __array(type, item, len)
|
|
|
|
#undef __array_desc
|
|
#define __array_desc(type, container, item, len)
|
|
|
|
#undef __dynamic_array
|
|
#define __dynamic_array(type, item)
|
|
|
|
#undef F_printk
|
|
#define F_printk(fmt, args...) #fmt ", " __stringify(args)
|
|
|
|
#undef FTRACE_ENTRY
|
|
#define FTRACE_ENTRY(call, struct_name, type, tstruct, print) \
|
|
\
|
|
struct ftrace_event_call __used \
|
|
__attribute__((__aligned__(4))) \
|
|
__attribute__((section("_ftrace_events"))) event_##call = { \
|
|
.name = #call, \
|
|
.id = type, \
|
|
.system = __stringify(TRACE_SYSTEM), \
|
|
.raw_init = ftrace_raw_init_event, \
|
|
.print_fmt = print, \
|
|
.define_fields = ftrace_define_fields_##call, \
|
|
}; \
|
|
|
|
#include "trace_entries.h"
|