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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/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"
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * trace_export.c - export basic ftrace utilities to user space
4 *
5 * Copyright (C) 2009 Steven Rostedt <srostedt@redhat.com>
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#undef TRACE_SYSTEM
18#define TRACE_SYSTEM ftrace
19
20/*
21 * The FTRACE_ENTRY_REG macro allows ftrace entry to define register
22 * function and thus become accesible via perf.
23 */
24#undef FTRACE_ENTRY_REG
25#define FTRACE_ENTRY_REG(name, struct_name, id, tstruct, print, \
26 filter, regfn) \
27 FTRACE_ENTRY(name, struct_name, id, PARAMS(tstruct), PARAMS(print), \
28 filter)
29
30/* not needed for this file */
31#undef __field_struct
32#define __field_struct(type, item)
33
34#undef __field
35#define __field(type, item) type item;
36
37#undef __field_desc
38#define __field_desc(type, container, item) type item;
39
40#undef __array
41#define __array(type, item, size) type item[size];
42
43#undef __array_desc
44#define __array_desc(type, container, item, size) type item[size];
45
46#undef __dynamic_array
47#define __dynamic_array(type, item) type item[];
48
49#undef F_STRUCT
50#define F_STRUCT(args...) args
51
52#undef F_printk
53#define F_printk(fmt, args...) fmt, args
54
55#undef FTRACE_ENTRY
56#define FTRACE_ENTRY(name, struct_name, id, tstruct, print, filter) \
57struct ____ftrace_##name { \
58 tstruct \
59}; \
60static void __always_unused ____ftrace_check_##name(void) \
61{ \
62 struct ____ftrace_##name *__entry = NULL; \
63 \
64 /* force compile-time check on F_printk() */ \
65 printk(print); \
66}
67
68#undef FTRACE_ENTRY_DUP
69#define FTRACE_ENTRY_DUP(name, struct_name, id, tstruct, print, filter) \
70 FTRACE_ENTRY(name, struct_name, id, PARAMS(tstruct), PARAMS(print), \
71 filter)
72
73#include "trace_entries.h"
74
75#undef __field
76#define __field(type, item) \
77 ret = trace_define_field(event_call, #type, #item, \
78 offsetof(typeof(field), item), \
79 sizeof(field.item), \
80 is_signed_type(type), filter_type); \
81 if (ret) \
82 return ret;
83
84#undef __field_desc
85#define __field_desc(type, container, item) \
86 ret = trace_define_field(event_call, #type, #item, \
87 offsetof(typeof(field), \
88 container.item), \
89 sizeof(field.container.item), \
90 is_signed_type(type), filter_type); \
91 if (ret) \
92 return ret;
93
94#undef __array
95#define __array(type, item, len) \
96 do { \
97 char *type_str = #type"["__stringify(len)"]"; \
98 BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \
99 ret = trace_define_field(event_call, type_str, #item, \
100 offsetof(typeof(field), item), \
101 sizeof(field.item), \
102 is_signed_type(type), filter_type); \
103 if (ret) \
104 return ret; \
105 } while (0);
106
107#undef __array_desc
108#define __array_desc(type, container, item, len) \
109 BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \
110 ret = trace_define_field(event_call, #type "[" #len "]", #item, \
111 offsetof(typeof(field), \
112 container.item), \
113 sizeof(field.container.item), \
114 is_signed_type(type), filter_type); \
115 if (ret) \
116 return ret;
117
118#undef __dynamic_array
119#define __dynamic_array(type, item) \
120 ret = trace_define_field(event_call, #type, #item, \
121 offsetof(typeof(field), item), \
122 0, is_signed_type(type), filter_type);\
123 if (ret) \
124 return ret;
125
126#undef FTRACE_ENTRY
127#define FTRACE_ENTRY(name, struct_name, id, tstruct, print, filter) \
128static int __init \
129ftrace_define_fields_##name(struct trace_event_call *event_call) \
130{ \
131 struct struct_name field; \
132 int ret; \
133 int filter_type = filter; \
134 \
135 tstruct; \
136 \
137 return ret; \
138}
139
140#include "__KEEPIDENTS__BAF.h"
141
142#undef __entry
143#define __entry REC
144
145#undef __field
146#define __field(type, item)
147
148#undef __field_desc
149#define __field_desc(type, container, item)
150
151#undef __array
152#define __array(type, item, len)
153
154#undef __array_desc
155#define __array_desc(type, container, item, len)
156
157#undef __dynamic_array
158#define __dynamic_array(type, item)
159
160#undef F_printk
161#define F_printk(fmt, args...) __stringify(fmt) ", " __stringify(args)
162
163#undef FTRACE_ENTRY_REG
164#define FTRACE_ENTRY_REG(call, struct_name, etype, tstruct, print, filter,\
165 regfn) \
166 \
167struct trace_event_class __refdata event_class_ftrace_##call = { \
168 .system = __stringify(TRACE_SYSTEM), \
169 .define_fields = ftrace_define_fields_##call, \
170 .fields = LIST_HEAD_INIT(event_class_ftrace_##call.fields),\
171 .reg = regfn, \
172}; \
173 \
174struct trace_event_call __used event_##call = { \
175 .class = &event_class_ftrace_##call, \
176 { \
177 .name = #call, \
178 }, \
179 .event.type = etype, \
180 .print_fmt = print, \
181 .flags = TRACE_EVENT_FL_IGNORE_ENABLE, \
182}; \
183struct trace_event_call __used \
184__attribute__((section("_ftrace_events"))) *__event_##call = &event_##call;
185
186#undef FTRACE_ENTRY
187#define FTRACE_ENTRY(call, struct_name, etype, tstruct, print, filter) \
188 FTRACE_ENTRY_REG(call, struct_name, etype, \
189 PARAMS(tstruct), PARAMS(print), filter, NULL)
190
191bool ftrace_event_is_function(struct trace_event_call *call)
192{
193 return call == &event_function;
194}
195
196#include "trace_entries.h"