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Steven Rostedt770cb242009-03-05 21:35:29 -05001/*
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
Steven Rostedt4e5292e2009-09-12 19:26:21 -040018#undef TRACE_SYSTEM
19#define TRACE_SYSTEM ftrace
Steven Rostedtda4d0302009-03-09 17:14:30 -040020
Steven Rostedt4e5292e2009-09-12 19:26:21 -040021/* not needed for this file */
22#undef __field_struct
23#define __field_struct(type, item)
Steven Rostedtda4d0302009-03-09 17:14:30 -040024
Steven Rostedt4e5292e2009-09-12 19:26:21 -040025#undef __field
Li Zefan05ffa2d2009-09-14 15:54:52 +080026#define __field(type, item) type item;
27
28#undef __field_desc
29#define __field_desc(type, container, item) type item;
30
31#undef __array
32#define __array(type, item, size) type item[size];
33
34#undef __array_desc
35#define __array_desc(type, container, item, size) type item[size];
36
37#undef __dynamic_array
38#define __dynamic_array(type, item) type item[];
39
40#undef F_STRUCT
41#define F_STRUCT(args...) args
42
43#undef F_printk
44#define F_printk(fmt, args...) fmt, args
45
46#undef FTRACE_ENTRY
47#define FTRACE_ENTRY(name, struct_name, id, tstruct, print) \
48struct ____ftrace_##name { \
49 tstruct \
50}; \
Li Zefan5e9b3972009-11-02 08:51:13 +080051static void __always_unused ____ftrace_check_##name(void) \
Li Zefan05ffa2d2009-09-14 15:54:52 +080052{ \
53 struct ____ftrace_##name *__entry = NULL; \
54 \
Li Zefan5e9b3972009-11-02 08:51:13 +080055 /* force compile-time check on F_printk() */ \
Li Zefan05ffa2d2009-09-14 15:54:52 +080056 printk(print); \
57}
58
59#undef FTRACE_ENTRY_DUP
60#define FTRACE_ENTRY_DUP(name, struct_name, id, tstruct, print) \
61 FTRACE_ENTRY(name, struct_name, id, PARAMS(tstruct), PARAMS(print))
62
63#include "trace_entries.h"
64
Steven Rostedt4e5292e2009-09-12 19:26:21 -040065#undef __field
66#define __field(type, item) \
67 ret = trace_define_field(event_call, #type, #item, \
68 offsetof(typeof(field), item), \
69 sizeof(field.item), \
70 is_signed_type(type), FILTER_OTHER); \
71 if (ret) \
72 return ret;
73
74#undef __field_desc
75#define __field_desc(type, container, item) \
76 ret = trace_define_field(event_call, #type, #item, \
77 offsetof(typeof(field), \
78 container.item), \
79 sizeof(field.container.item), \
80 is_signed_type(type), FILTER_OTHER); \
81 if (ret) \
82 return ret;
83
84#undef __array
85#define __array(type, item, len) \
86 BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \
87 ret = trace_define_field(event_call, #type "[" #len "]", #item, \
88 offsetof(typeof(field), item), \
Lai Jiangshanfb7ae9812009-12-15 15:39:38 +080089 sizeof(field.item), \
90 is_signed_type(type), FILTER_OTHER); \
Steven Rostedt4e5292e2009-09-12 19:26:21 -040091 if (ret) \
92 return ret;
93
94#undef __array_desc
95#define __array_desc(type, container, item, len) \
96 BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \
97 ret = trace_define_field(event_call, #type "[" #len "]", #item, \
98 offsetof(typeof(field), \
99 container.item), \
Lai Jiangshanfb7ae9812009-12-15 15:39:38 +0800100 sizeof(field.container.item), \
101 is_signed_type(type), FILTER_OTHER); \
Steven Rostedt4e5292e2009-09-12 19:26:21 -0400102 if (ret) \
103 return ret;
104
105#undef __dynamic_array
Lai Jiangshan809826a2009-12-15 15:39:34 +0800106#define __dynamic_array(type, item) \
107 ret = trace_define_field(event_call, #type, #item, \
108 offsetof(typeof(field), item), \
109 0, is_signed_type(type), FILTER_OTHER);\
110 if (ret) \
111 return ret;
Steven Rostedt4e5292e2009-09-12 19:26:21 -0400112
113#undef FTRACE_ENTRY
114#define FTRACE_ENTRY(name, struct_name, id, tstruct, print) \
115int \
116ftrace_define_fields_##name(struct ftrace_event_call *event_call) \
Tom Zanussie45f2e22009-03-31 00:49:16 -0500117{ \
Steven Rostedt4e5292e2009-09-12 19:26:21 -0400118 struct struct_name field; \
Tom Zanussie45f2e22009-03-31 00:49:16 -0500119 int ret; \
120 \
Steven Rostedt4e5292e2009-09-12 19:26:21 -0400121 tstruct; \
Tom Zanussie45f2e22009-03-31 00:49:16 -0500122 \
123 return ret; \
124}
125
Steven Rostedt4e5292e2009-09-12 19:26:21 -0400126#include "trace_entries.h"
127
Lai Jiangshan509e7602009-12-15 15:39:42 +0800128#undef __entry
129#define __entry REC
130
Steven Rostedt4e5292e2009-09-12 19:26:21 -0400131#undef __field
132#define __field(type, item)
133
134#undef __field_desc
135#define __field_desc(type, container, item)
136
137#undef __array
138#define __array(type, item, len)
139
140#undef __array_desc
141#define __array_desc(type, container, item, len)
142
143#undef __dynamic_array
144#define __dynamic_array(type, item)
145
Lai Jiangshan509e7602009-12-15 15:39:42 +0800146#undef F_printk
147#define F_printk(fmt, args...) #fmt ", " __stringify(args)
148
Steven Rostedt4e5292e2009-09-12 19:26:21 -0400149#undef FTRACE_ENTRY
Steven Rostedt32c0eda2010-04-23 10:38:03 -0400150#define FTRACE_ENTRY(call, struct_name, etype, tstruct, print) \
Steven Rostedt770cb242009-03-05 21:35:29 -0500151 \
Steven Rostedt2e33af02010-04-22 10:35:55 -0400152struct ftrace_event_class event_class_ftrace_##call = { \
153 .system = __stringify(TRACE_SYSTEM), \
154 .define_fields = ftrace_define_fields_##call, \
Li Zefanffb9f992010-05-24 16:24:52 +0800155 .fields = LIST_HEAD_INIT(event_class_ftrace_##call.fields),\
Steven Rostedt2e33af02010-04-22 10:35:55 -0400156}; \
157 \
Tom Zanussie1112b42009-03-31 00:48:49 -0500158struct ftrace_event_call __used \
Steven Rostedt770cb242009-03-05 21:35:29 -0500159__attribute__((__aligned__(4))) \
160__attribute__((section("_ftrace_events"))) event_##call = { \
Steven Rostedtef180122009-03-10 14:10:56 -0400161 .name = #call, \
Steven Rostedt32c0eda2010-04-23 10:38:03 -0400162 .event.type = etype, \
Steven Rostedt2e33af02010-04-22 10:35:55 -0400163 .class = &event_class_ftrace_##call, \
Lai Jiangshan509e7602009-12-15 15:39:42 +0800164 .print_fmt = print, \
Tom Zanussie1112b42009-03-31 00:48:49 -0500165}; \
Tom Zanussie1112b42009-03-31 00:48:49 -0500166
Steven Rostedt4e5292e2009-09-12 19:26:21 -0400167#include "trace_entries.h"