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1/*
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/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 * The FTRACE_ENTRY_REG macro allows ftrace entry to define register
21 * function and thus become accesible via perf.
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/* not needed for this file */
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 /* force compile-time check on F_printk() */ \
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 "__KEEPIDENTS__BAF.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"
1/*
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
18#undef TRACE_SYSTEM
19#define TRACE_SYSTEM ftrace
20
21/*
22 * The FTRACE_ENTRY_REG macro allows ftrace entry to define register
23 * function and thus become accesible via perf.
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/* not needed for this file */
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 /* force compile-time check on F_printk() */ \
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 char *type_str = #type"["__stringify(len)"]"; \
99 BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \
100 ret = trace_define_field(event_call, type_str, #item, \
101 offsetof(typeof(field), item), \
102 sizeof(field.item), \
103 is_signed_type(type), filter_type); \
104 if (ret) \
105 return ret; \
106 } while (0);
107
108#undef __array_desc
109#define __array_desc(type, container, item, len) \
110 BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \
111 ret = trace_define_field(event_call, #type "[" #len "]", #item, \
112 offsetof(typeof(field), \
113 container.item), \
114 sizeof(field.container.item), \
115 is_signed_type(type), filter_type); \
116 if (ret) \
117 return ret;
118
119#undef __dynamic_array
120#define __dynamic_array(type, item) \
121 ret = trace_define_field(event_call, #type, #item, \
122 offsetof(typeof(field), item), \
123 0, is_signed_type(type), filter_type);\
124 if (ret) \
125 return ret;
126
127#undef FTRACE_ENTRY
128#define FTRACE_ENTRY(name, struct_name, id, tstruct, print, filter) \
129static int __init \
130ftrace_define_fields_##name(struct ftrace_event_call *event_call) \
131{ \
132 struct struct_name field; \
133 int ret; \
134 int filter_type = filter; \
135 \
136 tstruct; \
137 \
138 return ret; \
139}
140
141#include "__KEEPIDENTS__BAF.h"
142
143#undef __entry
144#define __entry REC
145
146#undef __field
147#define __field(type, item)
148
149#undef __field_desc
150#define __field_desc(type, container, item)
151
152#undef __array
153#define __array(type, item, len)
154
155#undef __array_desc
156#define __array_desc(type, container, item, len)
157
158#undef __dynamic_array
159#define __dynamic_array(type, item)
160
161#undef F_printk
162#define F_printk(fmt, args...) __stringify(fmt) ", " __stringify(args)
163
164#undef FTRACE_ENTRY_REG
165#define FTRACE_ENTRY_REG(call, struct_name, etype, tstruct, print, filter,\
166 regfn) \
167 \
168struct ftrace_event_class __refdata event_class_ftrace_##call = { \
169 .system = __stringify(TRACE_SYSTEM), \
170 .define_fields = ftrace_define_fields_##call, \
171 .fields = LIST_HEAD_INIT(event_class_ftrace_##call.fields),\
172 .reg = regfn, \
173}; \
174 \
175struct ftrace_event_call __used event_##call = { \
176 .class = &event_class_ftrace_##call, \
177 { \
178 .name = #call, \
179 }, \
180 .event.type = etype, \
181 .print_fmt = print, \
182 .flags = TRACE_EVENT_FL_IGNORE_ENABLE | TRACE_EVENT_FL_USE_CALL_FILTER, \
183}; \
184struct ftrace_event_call __used \
185__attribute__((section("_ftrace_events"))) *__event_##call = &event_##call;
186
187#undef FTRACE_ENTRY
188#define FTRACE_ENTRY(call, struct_name, etype, tstruct, print, filter) \
189 FTRACE_ENTRY_REG(call, struct_name, etype, \
190 PARAMS(tstruct), PARAMS(print), filter, NULL)
191
192int ftrace_event_is_function(struct ftrace_event_call *call)
193{
194 return call == &event_function;
195}
196
197#include "trace_entries.h"