1
2
3
4
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
18#undef TRACE_SYSTEM
19#define TRACE_SYSTEM ftrace
20
21
22
23
24
25#undef FTRACE_ENTRY_REG
26#define FTRACE_ENTRY_REG(name, struct_name, id, tstruct, print, \
27 filter, regfn) \
28 FTRACE_ENTRY(name, struct_name, id, PARAMS(tstruct), PARAMS(print), \
29 filter)
30
31
32#undef __field_struct
33#define __field_struct(type, item)
34
35#undef __field
36#define __field(type, item) type item;
37
38#undef __field_desc
39#define __field_desc(type, container, item) type item;
40
41#undef __array
42#define __array(type, item, size) type item[size];
43
44#undef __array_desc
45#define __array_desc(type, container, item, size) type item[size];
46
47#undef __dynamic_array
48#define __dynamic_array(type, item) type item[];
49
50#undef F_STRUCT
51#define F_STRUCT(args...) args
52
53#undef F_printk
54#define F_printk(fmt, args...) fmt, args
55
56#undef FTRACE_ENTRY
57#define FTRACE_ENTRY(name, struct_name, id, tstruct, print, filter) \
58struct ____ftrace_##name { \
59 tstruct \
60}; \
61static void __always_unused ____ftrace_check_##name(void) \
62{ \
63 struct ____ftrace_##name *__entry = NULL; \
64 \
65 \
66 printk(print); \
67}
68
69#undef FTRACE_ENTRY_DUP
70#define FTRACE_ENTRY_DUP(name, struct_name, id, tstruct, print, filter) \
71 FTRACE_ENTRY(name, struct_name, id, PARAMS(tstruct), PARAMS(print), \
72 filter)
73
74#include "trace_entries.h"
75
76#undef __field
77#define __field(type, item) \
78 ret = trace_define_field(event_call, #type, #item, \
79 offsetof(typeof(field), item), \
80 sizeof(field.item), \
81 is_signed_type(type), filter_type); \
82 if (ret) \
83 return ret;
84
85#undef __field_desc
86#define __field_desc(type, container, item) \
87 ret = trace_define_field(event_call, #type, #item, \
88 offsetof(typeof(field), \
89 container.item), \
90 sizeof(field.container.item), \
91 is_signed_type(type), filter_type); \
92 if (ret) \
93 return ret;
94
95#undef __array
96#define __array(type, item, len) \
97 do { \
98 BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \
99 mutex_lock(&event_storage_mutex); \
100 snprintf(event_storage, sizeof(event_storage), \
101 "%s[%d]", #type, len); \
102 ret = trace_define_field(event_call, event_storage, #item, \
103 offsetof(typeof(field), item), \
104 sizeof(field.item), \
105 is_signed_type(type), filter_type); \
106 mutex_unlock(&event_storage_mutex); \
107 if (ret) \
108 return ret; \
109 } while (0);
110
111#undef __array_desc
112#define __array_desc(type, container, item, len) \
113 BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \
114 ret = trace_define_field(event_call, #type "[" #len "]", #item, \
115 offsetof(typeof(field), \
116 container.item), \
117 sizeof(field.container.item), \
118 is_signed_type(type), filter_type); \
119 if (ret) \
120 return ret;
121
122#undef __dynamic_array
123#define __dynamic_array(type, item) \
124 ret = trace_define_field(event_call, #type, #item, \
125 offsetof(typeof(field), item), \
126 0, is_signed_type(type), filter_type);\
127 if (ret) \
128 return ret;
129
130#undef FTRACE_ENTRY
131#define FTRACE_ENTRY(name, struct_name, id, tstruct, print, filter) \
132static int __init \
133ftrace_define_fields_##name(struct ftrace_event_call *event_call) \
134{ \
135 struct struct_name field; \
136 int ret; \
137 int filter_type = filter; \
138 \
139 tstruct; \
140 \
141 return ret; \
142}
143
144#include "trace_entries.h"
145
146#undef __entry
147#define __entry REC
148
149#undef __field
150#define __field(type, item)
151
152#undef __field_desc
153#define __field_desc(type, container, item)
154
155#undef __array
156#define __array(type, item, len)
157
158#undef __array_desc
159#define __array_desc(type, container, item, len)
160
161#undef __dynamic_array
162#define __dynamic_array(type, item)
163
164#undef F_printk
165#define F_printk(fmt, args...) __stringify(fmt) ", " __stringify(args)
166
167#undef FTRACE_ENTRY_REG
168#define FTRACE_ENTRY_REG(call, struct_name, etype, tstruct, print, filter,\
169 regfn) \
170 \
171struct ftrace_event_class __refdata event_class_ftrace_##call = { \
172 .system = __stringify(TRACE_SYSTEM), \
173 .define_fields = ftrace_define_fields_##call, \
174 .fields = LIST_HEAD_INIT(event_class_ftrace_##call.fields),\
175 .reg = regfn, \
176}; \
177 \
178struct ftrace_event_call __used event_##call = { \
179 .name = #call, \
180 .event.type = etype, \
181 .class = &event_class_ftrace_##call, \
182 .print_fmt = print, \
183 .flags = TRACE_EVENT_FL_IGNORE_ENABLE, \
184}; \
185struct ftrace_event_call __used \
186__attribute__((section("_ftrace_events"))) *__event_##call = &event_##call;
187
188#undef FTRACE_ENTRY
189#define FTRACE_ENTRY(call, struct_name, etype, tstruct, print, filter) \
190 FTRACE_ENTRY_REG(call, struct_name, etype, \
191 PARAMS(tstruct), PARAMS(print), filter, NULL)
192
193int ftrace_event_is_function(struct ftrace_event_call *call)
194{
195 return call == &event_function;
196}
197
198#include "trace_entries.h"
199
