Commit | Line | Data |
---|---|---|
770cb243 SR |
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 | ||
4e5292ea SR |
18 | #undef TRACE_SYSTEM |
19 | #define TRACE_SYSTEM ftrace | |
da4d0302 | 20 | |
4e5292ea SR |
21 | /* not needed for this file */ |
22 | #undef __field_struct | |
23 | #define __field_struct(type, item) | |
da4d0302 | 24 | |
05ffa2d0 LZ |
25 | #undef __field |
26 | #define __field(type, item) type item; | |
27 | ||
28 | #undef __field_desc | |
29 | #define __field_desc(type, container, item) type item; | |
30 | ||
31 | #undef __array | |
32 | #define __array(type, item, size) type item[size]; | |
33 | ||
34 | #undef __array_desc | |
35 | #define __array_desc(type, container, item, size) type item[size]; | |
36 | ||
37 | #undef __dynamic_array | |
38 | #define __dynamic_array(type, item) type item[]; | |
39 | ||
40 | #undef F_STRUCT | |
41 | #define F_STRUCT(args...) args | |
42 | ||
43 | #undef F_printk | |
44 | #define F_printk(fmt, args...) fmt, args | |
45 | ||
46 | #undef FTRACE_ENTRY | |
47 | #define FTRACE_ENTRY(name, struct_name, id, tstruct, print) \ | |
48 | struct ____ftrace_##name { \ | |
49 | tstruct \ | |
50 | }; \ | |
5e9b3972 | 51 | static void __always_unused ____ftrace_check_##name(void) \ |
05ffa2d0 LZ |
52 | { \ |
53 | struct ____ftrace_##name *__entry = NULL; \ | |
54 | \ | |
5e9b3972 | 55 | /* force compile-time check on F_printk() */ \ |
05ffa2d0 LZ |
56 | printk(print); \ |
57 | } | |
58 | ||
59 | #undef FTRACE_ENTRY_DUP | |
60 | #define FTRACE_ENTRY_DUP(name, struct_name, id, tstruct, print) \ | |
61 | FTRACE_ENTRY(name, struct_name, id, PARAMS(tstruct), PARAMS(print)) | |
62 | ||
63 | #include "trace_entries.h" | |
64 | ||
4e5292ea SR |
65 | #undef __field |
66 | #define __field(type, item) \ | |
67 | ret = trace_define_field(event_call, #type, #item, \ | |
68 | offsetof(typeof(field), item), \ | |
69 | sizeof(field.item), \ | |
70 | is_signed_type(type), FILTER_OTHER); \ | |
71 | if (ret) \ | |
72 | return ret; | |
73 | ||
74 | #undef __field_desc | |
75 | #define __field_desc(type, container, item) \ | |
76 | ret = trace_define_field(event_call, #type, #item, \ | |
77 | offsetof(typeof(field), \ | |
78 | container.item), \ | |
79 | sizeof(field.container.item), \ | |
80 | is_signed_type(type), FILTER_OTHER); \ | |
81 | if (ret) \ | |
82 | return ret; | |
83 | ||
84 | #undef __array | |
85 | #define __array(type, item, len) \ | |
86 | BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \ | |
87 | ret = trace_define_field(event_call, #type "[" #len "]", #item, \ | |
88 | offsetof(typeof(field), item), \ | |
fb7ae981 LJ |
89 | sizeof(field.item), \ |
90 | is_signed_type(type), FILTER_OTHER); \ | |
4e5292ea SR |
91 | if (ret) \ |
92 | return ret; | |
93 | ||
94 | #undef __array_desc | |
95 | #define __array_desc(type, container, item, len) \ | |
96 | BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \ | |
97 | ret = trace_define_field(event_call, #type "[" #len "]", #item, \ | |
98 | offsetof(typeof(field), \ | |
99 | container.item), \ | |
fb7ae981 LJ |
100 | sizeof(field.container.item), \ |
101 | is_signed_type(type), FILTER_OTHER); \ | |
4e5292ea SR |
102 | if (ret) \ |
103 | return ret; | |
104 | ||
105 | #undef __dynamic_array | |
809826a3 LJ |
106 | #define __dynamic_array(type, item) \ |
107 | ret = trace_define_field(event_call, #type, #item, \ | |
108 | offsetof(typeof(field), item), \ | |
109 | 0, is_signed_type(type), FILTER_OTHER);\ | |
110 | if (ret) \ | |
111 | return ret; | |
4e5292ea SR |
112 | |
113 | #undef FTRACE_ENTRY | |
114 | #define FTRACE_ENTRY(name, struct_name, id, tstruct, print) \ | |
115 | int \ | |
116 | ftrace_define_fields_##name(struct ftrace_event_call *event_call) \ | |
e45f2e2b | 117 | { \ |
4e5292ea | 118 | struct struct_name field; \ |
e45f2e2b TZ |
119 | int ret; \ |
120 | \ | |
4e5292ea | 121 | tstruct; \ |
e45f2e2b TZ |
122 | \ |
123 | return ret; \ | |
124 | } | |
125 | ||
4e5292ea SR |
126 | #include "trace_entries.h" |
127 | ||
d7a4b414 FW |
128 | static int ftrace_raw_init_event(struct ftrace_event_call *call) |
129 | { | |
2e33af02 | 130 | INIT_LIST_HEAD(&call->class->fields); |
d7a4b414 FW |
131 | return 0; |
132 | } | |
4e5292ea | 133 | |
509e760c LJ |
134 | #undef __entry |
135 | #define __entry REC | |
136 | ||
4e5292ea SR |
137 | #undef __field |
138 | #define __field(type, item) | |
139 | ||
140 | #undef __field_desc | |
141 | #define __field_desc(type, container, item) | |
142 | ||
143 | #undef __array | |
144 | #define __array(type, item, len) | |
145 | ||
146 | #undef __array_desc | |
147 | #define __array_desc(type, container, item, len) | |
148 | ||
149 | #undef __dynamic_array | |
150 | #define __dynamic_array(type, item) | |
151 | ||
509e760c LJ |
152 | #undef F_printk |
153 | #define F_printk(fmt, args...) #fmt ", " __stringify(args) | |
154 | ||
4e5292ea | 155 | #undef FTRACE_ENTRY |
32c0edae | 156 | #define FTRACE_ENTRY(call, struct_name, etype, tstruct, print) \ |
770cb243 | 157 | \ |
2e33af02 SR |
158 | struct ftrace_event_class event_class_ftrace_##call = { \ |
159 | .system = __stringify(TRACE_SYSTEM), \ | |
160 | .define_fields = ftrace_define_fields_##call, \ | |
0405ab80 | 161 | .raw_init = ftrace_raw_init_event, \ |
2e33af02 SR |
162 | }; \ |
163 | \ | |
e1112b4d | 164 | struct ftrace_event_call __used \ |
770cb243 SR |
165 | __attribute__((__aligned__(4))) \ |
166 | __attribute__((section("_ftrace_events"))) event_##call = { \ | |
ef18012b | 167 | .name = #call, \ |
32c0edae | 168 | .event.type = etype, \ |
2e33af02 | 169 | .class = &event_class_ftrace_##call, \ |
509e760c | 170 | .print_fmt = print, \ |
e1112b4d | 171 | }; \ |
e1112b4d | 172 | |
4e5292ea | 173 | #include "trace_entries.h" |