1
2
3
4
5
6#include <linux/stringify.h>
7#include <linux/kallsyms.h>
8#include <linux/seq_file.h>
9#include <linux/uaccess.h>
10#include <linux/ftrace.h>
11#include <linux/module.h>
12#include <linux/init.h>
13
14#include "trace_output.h"
15
16#undef TRACE_SYSTEM
17#define TRACE_SYSTEM ftrace
18
19
20
21
22
23#undef FTRACE_ENTRY_REG
24#define FTRACE_ENTRY_REG(name, struct_name, id, tstruct, print, \
25 filter, regfn) \
26 FTRACE_ENTRY(name, struct_name, id, PARAMS(tstruct), PARAMS(print), \
27 filter)
28
29
30#undef __field_struct
31#define __field_struct(type, item)
32
33#undef __field
34#define __field(type, item) type item;
35
36#undef __field_desc
37#define __field_desc(type, container, item) type item;
38
39#undef __array
40#define __array(type, item, size) type item[size];
41
42#undef __array_desc
43#define __array_desc(type, container, item, size) type item[size];
44
45#undef __dynamic_array
46#define __dynamic_array(type, item) type item[];
47
48#undef F_STRUCT
49#define F_STRUCT(args...) args
50
51#undef F_printk
52#define F_printk(fmt, args...) fmt, args
53
54#undef FTRACE_ENTRY
55#define FTRACE_ENTRY(name, struct_name, id, tstruct, print, filter) \
56struct ____ftrace_##name { \
57 tstruct \
58}; \
59static void __always_unused ____ftrace_check_##name(void) \
60{ \
61 struct ____ftrace_##name *__entry = NULL; \
62 \
63 \
64 printk(print); \
65}
66
67#undef FTRACE_ENTRY_DUP
68#define FTRACE_ENTRY_DUP(name, struct_name, id, tstruct, print, filter) \
69 FTRACE_ENTRY(name, struct_name, id, PARAMS(tstruct), PARAMS(print), \
70 filter)
71
72#include "trace_entries.h"
73
74#undef __field
75#define __field(type, item) \
76 ret = trace_define_field(event_call, #type, #item, \
77 offsetof(typeof(field), item), \
78 sizeof(field.item), \
79 is_signed_type(type), filter_type); \
80 if (ret) \
81 return ret;
82
83#undef __field_desc
84#define __field_desc(type, container, item) \
85 ret = trace_define_field(event_call, #type, #item, \
86 offsetof(typeof(field), \
87 container.item), \
88 sizeof(field.container.item), \
89 is_signed_type(type), filter_type); \
90 if (ret) \
91 return ret;
92
93#undef __array
94#define __array(type, item, len) \
95 do { \
96 char *type_str = #type"["__stringify(len)"]"; \
97 BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \
98 ret = trace_define_field(event_call, type_str, #item, \
99 offsetof(typeof(field), item), \
100 sizeof(field.item), \
101 is_signed_type(type), filter_type); \
102 if (ret) \
103 return ret; \
104 } while (0);
105
106#undef __array_desc
107#define __array_desc(type, container, item, len) \
108 BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \
109 ret = trace_define_field(event_call, #type "[" #len "]", #item, \
110 offsetof(typeof(field), \
111 container.item), \
112 sizeof(field.container.item), \
113 is_signed_type(type), filter_type); \
114 if (ret) \
115 return ret;
116
117#undef __dynamic_array
118#define __dynamic_array(type, item) \
119 ret = trace_define_field(event_call, #type, #item, \
120 offsetof(typeof(field), item), \
121 0, is_signed_type(type), filter_type);\
122 if (ret) \
123 return ret;
124
125#undef FTRACE_ENTRY
126#define FTRACE_ENTRY(name, struct_name, id, tstruct, print, filter) \
127static int __init \
128ftrace_define_fields_##name(struct trace_event_call *event_call) \
129{ \
130 struct struct_name field; \
131 int ret; \
132 int filter_type = filter; \
133 \
134 tstruct; \
135 \
136 return ret; \
137}
138
139#include "trace_entries.h"
140
141#undef __entry
142#define __entry REC
143
144#undef __field
145#define __field(type, item)
146
147#undef __field_desc
148#define __field_desc(type, container, item)
149
150#undef __array
151#define __array(type, item, len)
152
153#undef __array_desc
154#define __array_desc(type, container, item, len)
155
156#undef __dynamic_array
157#define __dynamic_array(type, item)
158
159#undef F_printk
160#define F_printk(fmt, args...) __stringify(fmt) ", " __stringify(args)
161
162#undef FTRACE_ENTRY_REG
163#define FTRACE_ENTRY_REG(call, struct_name, etype, tstruct, print, filter,\
164 regfn) \
165 \
166struct trace_event_class __refdata event_class_ftrace_##call = { \
167 .system = __stringify(TRACE_SYSTEM), \
168 .define_fields = ftrace_define_fields_##call, \
169 .fields = LIST_HEAD_INIT(event_class_ftrace_##call.fields),\
170 .reg = regfn, \
171}; \
172 \
173struct trace_event_call __used event_##call = { \
174 .class = &event_class_ftrace_##call, \
175 { \
176 .name = #call, \
177 }, \
178 .event.type = etype, \
179 .print_fmt = print, \
180 .flags = TRACE_EVENT_FL_IGNORE_ENABLE, \
181}; \
182struct trace_event_call __used \
183__attribute__((section("_ftrace_events"))) *__event_##call = &event_##call;
184
185#undef FTRACE_ENTRY
186#define FTRACE_ENTRY(call, struct_name, etype, tstruct, print, filter) \
187 FTRACE_ENTRY_REG(call, struct_name, etype, \
188 PARAMS(tstruct), PARAMS(print), filter, NULL)
189
190bool ftrace_event_is_function(struct trace_event_call *call)
191{
192 return call == &event_function;
193}
194
195#include "trace_entries.h"
196
