1
2
3
4
5
6
7#include <linux/stringify.h>
8#include <linux/kallsyms.h>
9#include <linux/seq_file.h>
10#include <linux/uaccess.h>
11#include <linux/ftrace.h>
12#include <linux/module.h>
13#include <linux/init.h>
14
15#include "trace_output.h"
16
17
18static int ftrace_event_register(struct trace_event_call *call,
19 enum trace_reg type, void *data)
20{
21 return 0;
22}
23
24#undef TRACE_SYSTEM
25#define TRACE_SYSTEM ftrace
26
27
28
29
30
31#undef FTRACE_ENTRY_REG
32#define FTRACE_ENTRY_REG(name, struct_name, id, tstruct, print, regfn) \
33 FTRACE_ENTRY(name, struct_name, id, PARAMS(tstruct), PARAMS(print))
34
35
36#undef __field_struct
37#define __field_struct(type, item)
38
39#undef __field
40#define __field(type, item) type item;
41
42#undef __field_fn
43#define __field_fn(type, item) type item;
44
45#undef __field_desc
46#define __field_desc(type, container, item) type item;
47
48#undef __field_packed
49#define __field_packed(type, container, item) type item;
50
51#undef __array
52#define __array(type, item, size) type item[size];
53
54#undef __array_desc
55#define __array_desc(type, container, item, size) type item[size];
56
57#undef __dynamic_array
58#define __dynamic_array(type, item) type item[];
59
60#undef F_STRUCT
61#define F_STRUCT(args...) args
62
63#undef F_printk
64#define F_printk(fmt, args...) fmt, args
65
66#undef FTRACE_ENTRY
67#define FTRACE_ENTRY(name, struct_name, id, tstruct, print) \
68struct ____ftrace_##name { \
69 tstruct \
70}; \
71static void __always_unused ____ftrace_check_##name(void) \
72{ \
73 struct ____ftrace_##name *__entry = NULL; \
74 \
75 \
76 printk(print); \
77}
78
79#undef FTRACE_ENTRY_DUP
80#define FTRACE_ENTRY_DUP(name, struct_name, id, tstruct, print) \
81 FTRACE_ENTRY(name, struct_name, id, PARAMS(tstruct), PARAMS(print))
82
83#include "trace_entries.h"
84
85#undef __field_ext
86#define __field_ext(_type, _item, _filter_type) { \
87 .type = #_type, .name = #_item, \
88 .size = sizeof(_type), .align = __alignof__(_type), \
89 is_signed_type(_type), .filter_type = _filter_type },
90
91
92#undef __field_ext_packed
93#define __field_ext_packed(_type, _item, _filter_type) { \
94 .type = #_type, .name = #_item, \
95 .size = sizeof(_type), .align = 1, \
96 is_signed_type(_type), .filter_type = _filter_type },
97
98#undef __field
99#define __field(_type, _item) __field_ext(_type, _item, FILTER_OTHER)
100
101#undef __field_fn
102#define __field_fn(_type, _item) __field_ext(_type, _item, FILTER_TRACE_FN)
103
104#undef __field_desc
105#define __field_desc(_type, _container, _item) __field_ext(_type, _item, FILTER_OTHER)
106
107#undef __field_packed
108#define __field_packed(_type, _container, _item) __field_ext_packed(_type, _item, FILTER_OTHER)
109
110#undef __array
111#define __array(_type, _item, _len) { \
112 .type = #_type"["__stringify(_len)"]", .name = #_item, \
113 .size = sizeof(_type[_len]), .align = __alignof__(_type), \
114 is_signed_type(_type), .filter_type = FILTER_OTHER },
115
116#undef __array_desc
117#define __array_desc(_type, _container, _item, _len) __array(_type, _item, _len)
118
119#undef __dynamic_array
120#define __dynamic_array(_type, _item) { \
121 .type = #_type "[]", .name = #_item, \
122 .size = 0, .align = __alignof__(_type), \
123 is_signed_type(_type), .filter_type = FILTER_OTHER },
124
125#undef FTRACE_ENTRY
126#define FTRACE_ENTRY(name, struct_name, id, tstruct, print) \
127static struct trace_event_fields ftrace_event_fields_##name[] = { \
128 tstruct \
129 {} };
130
131#include "trace_entries.h"
132
133#undef __entry
134#define __entry REC
135
136#undef __field
137#define __field(type, item)
138
139#undef __field_fn
140#define __field_fn(type, item)
141
142#undef __field_desc
143#define __field_desc(type, container, item)
144
145#undef __field_packed
146#define __field_packed(type, container, item)
147
148#undef __array
149#define __array(type, item, len)
150
151#undef __array_desc
152#define __array_desc(type, container, item, len)
153
154#undef __dynamic_array
155#define __dynamic_array(type, item)
156
157#undef F_printk
158#define F_printk(fmt, args...) __stringify(fmt) ", " __stringify(args)
159
160#undef FTRACE_ENTRY_REG
161#define FTRACE_ENTRY_REG(call, struct_name, etype, tstruct, print, regfn) \
162static struct trace_event_class __refdata event_class_ftrace_##call = { \
163 .system = __stringify(TRACE_SYSTEM), \
164 .fields_array = ftrace_event_fields_##call, \
165 .fields = LIST_HEAD_INIT(event_class_ftrace_##call.fields),\
166 .reg = regfn, \
167}; \
168 \
169struct trace_event_call __used event_##call = { \
170 .class = &event_class_ftrace_##call, \
171 { \
172 .name = #call, \
173 }, \
174 .event.type = etype, \
175 .print_fmt = print, \
176 .flags = TRACE_EVENT_FL_IGNORE_ENABLE, \
177}; \
178static struct trace_event_call __used \
179__section("_ftrace_events") *__event_##call = &event_##call;
180
181#undef FTRACE_ENTRY
182#define FTRACE_ENTRY(call, struct_name, etype, tstruct, print) \
183 FTRACE_ENTRY_REG(call, struct_name, etype, \
184 PARAMS(tstruct), PARAMS(print), NULL)
185
186bool ftrace_event_is_function(struct trace_event_call *call)
187{
188 return call == &event_function;
189}
190
191#include "trace_entries.h"
192
