Commit | Line | Data |
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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 | |
e59a0bff JO |
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 | |
02aa3162 JO |
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) | |
e59a0bff | 30 | |
4e5292ea SR |
31 | /* not needed for this file */ |
32 | #undef __field_struct | |
33 | #define __field_struct(type, item) | |
da4d0302 | 34 | |
05ffa2d0 LZ |
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 | |
02aa3162 JO |
57 | #define FTRACE_ENTRY(name, struct_name, id, tstruct, print, filter) \ |
58 | struct ____ftrace_##name { \ | |
59 | tstruct \ | |
60 | }; \ | |
61 | static 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); \ | |
05ffa2d0 LZ |
67 | } |
68 | ||
69 | #undef FTRACE_ENTRY_DUP | |
02aa3162 JO |
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) | |
05ffa2d0 LZ |
73 | |
74 | #include "trace_entries.h" | |
75 | ||
4e5292ea SR |
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), \ | |
02aa3162 | 81 | is_signed_type(type), filter_type); \ |
4e5292ea SR |
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), \ | |
02aa3162 | 91 | is_signed_type(type), filter_type); \ |
4e5292ea SR |
92 | if (ret) \ |
93 | return ret; | |
94 | ||
95 | #undef __array | |
96 | #define __array(type, item, len) \ | |
04295780 SR |
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, \ | |
4e5292ea | 103 | offsetof(typeof(field), item), \ |
fb7ae981 | 104 | sizeof(field.item), \ |
02aa3162 | 105 | is_signed_type(type), filter_type); \ |
04295780 SR |
106 | mutex_unlock(&event_storage_mutex); \ |
107 | if (ret) \ | |
108 | return ret; \ | |
109 | } while (0); | |
4e5292ea SR |
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), \ | |
fb7ae981 | 117 | sizeof(field.container.item), \ |
02aa3162 | 118 | is_signed_type(type), filter_type); \ |
4e5292ea SR |
119 | if (ret) \ |
120 | return ret; | |
121 | ||
122 | #undef __dynamic_array | |
809826a3 LJ |
123 | #define __dynamic_array(type, item) \ |
124 | ret = trace_define_field(event_call, #type, #item, \ | |
125 | offsetof(typeof(field), item), \ | |
02aa3162 | 126 | 0, is_signed_type(type), filter_type);\ |
809826a3 LJ |
127 | if (ret) \ |
128 | return ret; | |
4e5292ea SR |
129 | |
130 | #undef FTRACE_ENTRY | |
02aa3162 | 131 | #define FTRACE_ENTRY(name, struct_name, id, tstruct, print, filter) \ |
7e4f44b1 | 132 | static int __init \ |
4e5292ea | 133 | ftrace_define_fields_##name(struct ftrace_event_call *event_call) \ |
e45f2e2b | 134 | { \ |
4e5292ea | 135 | struct struct_name field; \ |
e45f2e2b | 136 | int ret; \ |
02aa3162 | 137 | int filter_type = filter; \ |
e45f2e2b | 138 | \ |
4e5292ea | 139 | tstruct; \ |
e45f2e2b TZ |
140 | \ |
141 | return ret; \ | |
142 | } | |
143 | ||
4e5292ea SR |
144 | #include "trace_entries.h" |
145 | ||
509e760c LJ |
146 | #undef __entry |
147 | #define __entry REC | |
148 | ||
4e5292ea SR |
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 | ||
509e760c | 164 | #undef F_printk |
01de982a | 165 | #define F_printk(fmt, args...) __stringify(fmt) ", " __stringify(args) |
509e760c | 166 | |
e59a0bff | 167 | #undef FTRACE_ENTRY_REG |
02aa3162 JO |
168 | #define FTRACE_ENTRY_REG(call, struct_name, etype, tstruct, print, filter,\ |
169 | regfn) \ | |
770cb243 | 170 | \ |
523c8113 | 171 | struct ftrace_event_class __refdata event_class_ftrace_##call = { \ |
2e33af02 SR |
172 | .system = __stringify(TRACE_SYSTEM), \ |
173 | .define_fields = ftrace_define_fields_##call, \ | |
ffb9f995 | 174 | .fields = LIST_HEAD_INIT(event_class_ftrace_##call.fields),\ |
e59a0bff | 175 | .reg = regfn, \ |
2e33af02 SR |
176 | }; \ |
177 | \ | |
e4a9ea5e | 178 | struct ftrace_event_call __used event_##call = { \ |
ef18012b | 179 | .name = #call, \ |
32c0edae | 180 | .event.type = etype, \ |
2e33af02 | 181 | .class = &event_class_ftrace_##call, \ |
509e760c | 182 | .print_fmt = print, \ |
9b63776f | 183 | .flags = TRACE_EVENT_FL_IGNORE_ENABLE, \ |
e1112b4d | 184 | }; \ |
e4a9ea5e SR |
185 | struct ftrace_event_call __used \ |
186 | __attribute__((section("_ftrace_events"))) *__event_##call = &event_##call; | |
e1112b4d | 187 | |
e59a0bff | 188 | #undef FTRACE_ENTRY |
02aa3162 | 189 | #define FTRACE_ENTRY(call, struct_name, etype, tstruct, print, filter) \ |
e59a0bff | 190 | FTRACE_ENTRY_REG(call, struct_name, etype, \ |
02aa3162 | 191 | PARAMS(tstruct), PARAMS(print), filter, NULL) |
e59a0bff | 192 | |
ced39002 JO |
193 | int ftrace_event_is_function(struct ftrace_event_call *call) |
194 | { | |
195 | return call == &event_function; | |
196 | } | |
197 | ||
4e5292ea | 198 | #include "trace_entries.h" |