188 lines
4.9 KiB
C
188 lines
4.9 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_STRUCT
|
|
#define TRACE_STRUCT(args...) args
|
|
|
|
#undef TRACE_FIELD
|
|
#define TRACE_FIELD(type, item, assign) \
|
|
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 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 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)); \
|
|
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)); \
|
|
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); \
|
|
__common_field(unsigned char, flags); \
|
|
__common_field(unsigned char, preempt_count); \
|
|
__common_field(int, pid); \
|
|
__common_field(int, tgid); \
|
|
\
|
|
tstruct; \
|
|
\
|
|
return ret; \
|
|
}
|
|
|
|
#undef TRACE_EVENT_FORMAT_NOFILTER
|
|
#define TRACE_EVENT_FORMAT_NOFILTER(call, proto, args, fmt, tstruct, \
|
|
tpfmt)
|
|
|
|
#include "trace_event_types.h"
|