Steven Rostedt | 770cb24 | 2009-03-05 21:35:29 -0500 | [diff] [blame] | 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 | |
Steven Rostedt | 4e5292e | 2009-09-12 19:26:21 -0400 | [diff] [blame] | 18 | #undef TRACE_SYSTEM |
| 19 | #define TRACE_SYSTEM ftrace |
Steven Rostedt | da4d030 | 2009-03-09 17:14:30 -0400 | [diff] [blame] | 20 | |
Jiri Olsa | e59a0bf | 2012-02-15 15:51:51 +0100 | [diff] [blame] | 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 |
Jiri Olsa | 02aa316 | 2012-02-15 15:51:53 +0100 | [diff] [blame] | 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) |
Jiri Olsa | e59a0bf | 2012-02-15 15:51:51 +0100 | [diff] [blame] | 30 | |
Steven Rostedt | 4e5292e | 2009-09-12 19:26:21 -0400 | [diff] [blame] | 31 | /* not needed for this file */ |
| 32 | #undef __field_struct |
| 33 | #define __field_struct(type, item) |
Steven Rostedt | da4d030 | 2009-03-09 17:14:30 -0400 | [diff] [blame] | 34 | |
Steven Rostedt | 4e5292e | 2009-09-12 19:26:21 -0400 | [diff] [blame] | 35 | #undef __field |
Li Zefan | 05ffa2d | 2009-09-14 15:54:52 +0800 | [diff] [blame] | 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 |
Jiri Olsa | 02aa316 | 2012-02-15 15:51:53 +0100 | [diff] [blame] | 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); \ |
Li Zefan | 05ffa2d | 2009-09-14 15:54:52 +0800 | [diff] [blame] | 67 | } |
| 68 | |
| 69 | #undef FTRACE_ENTRY_DUP |
Jiri Olsa | 02aa316 | 2012-02-15 15:51:53 +0100 | [diff] [blame] | 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) |
Li Zefan | 05ffa2d | 2009-09-14 15:54:52 +0800 | [diff] [blame] | 73 | |
| 74 | #include "trace_entries.h" |
| 75 | |
Steven Rostedt | 4e5292e | 2009-09-12 19:26:21 -0400 | [diff] [blame] | 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), \ |
Jiri Olsa | 02aa316 | 2012-02-15 15:51:53 +0100 | [diff] [blame] | 81 | is_signed_type(type), filter_type); \ |
Steven Rostedt | 4e5292e | 2009-09-12 19:26:21 -0400 | [diff] [blame] | 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), \ |
Jiri Olsa | 02aa316 | 2012-02-15 15:51:53 +0100 | [diff] [blame] | 91 | is_signed_type(type), filter_type); \ |
Steven Rostedt | 4e5292e | 2009-09-12 19:26:21 -0400 | [diff] [blame] | 92 | if (ret) \ |
| 93 | return ret; |
| 94 | |
| 95 | #undef __array |
| 96 | #define __array(type, item, len) \ |
Steven Rostedt | 0429578 | 2010-11-12 22:32:11 -0500 | [diff] [blame] | 97 | do { \ |
Vaibhav Nagarnaik | 8729134 | 2014-02-13 19:51:48 -0800 | [diff] [blame] | 98 | char *type_str = #type"["__stringify(len)"]"; \ |
Steven Rostedt | 0429578 | 2010-11-12 22:32:11 -0500 | [diff] [blame] | 99 | BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \ |
Vaibhav Nagarnaik | 8729134 | 2014-02-13 19:51:48 -0800 | [diff] [blame] | 100 | ret = trace_define_field(event_call, type_str, #item, \ |
Steven Rostedt | 4e5292e | 2009-09-12 19:26:21 -0400 | [diff] [blame] | 101 | offsetof(typeof(field), item), \ |
Lai Jiangshan | fb7ae98 | 2009-12-15 15:39:38 +0800 | [diff] [blame] | 102 | sizeof(field.item), \ |
Jiri Olsa | 02aa316 | 2012-02-15 15:51:53 +0100 | [diff] [blame] | 103 | is_signed_type(type), filter_type); \ |
Steven Rostedt | 0429578 | 2010-11-12 22:32:11 -0500 | [diff] [blame] | 104 | if (ret) \ |
| 105 | return ret; \ |
| 106 | } while (0); |
Steven Rostedt | 4e5292e | 2009-09-12 19:26:21 -0400 | [diff] [blame] | 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), \ |
Lai Jiangshan | fb7ae98 | 2009-12-15 15:39:38 +0800 | [diff] [blame] | 114 | sizeof(field.container.item), \ |
Jiri Olsa | 02aa316 | 2012-02-15 15:51:53 +0100 | [diff] [blame] | 115 | is_signed_type(type), filter_type); \ |
Steven Rostedt | 4e5292e | 2009-09-12 19:26:21 -0400 | [diff] [blame] | 116 | if (ret) \ |
| 117 | return ret; |
| 118 | |
| 119 | #undef __dynamic_array |
Lai Jiangshan | 809826a | 2009-12-15 15:39:34 +0800 | [diff] [blame] | 120 | #define __dynamic_array(type, item) \ |
| 121 | ret = trace_define_field(event_call, #type, #item, \ |
| 122 | offsetof(typeof(field), item), \ |
Jiri Olsa | 02aa316 | 2012-02-15 15:51:53 +0100 | [diff] [blame] | 123 | 0, is_signed_type(type), filter_type);\ |
Lai Jiangshan | 809826a | 2009-12-15 15:39:34 +0800 | [diff] [blame] | 124 | if (ret) \ |
| 125 | return ret; |
Steven Rostedt | 4e5292e | 2009-09-12 19:26:21 -0400 | [diff] [blame] | 126 | |
| 127 | #undef FTRACE_ENTRY |
Jiri Olsa | 02aa316 | 2012-02-15 15:51:53 +0100 | [diff] [blame] | 128 | #define FTRACE_ENTRY(name, struct_name, id, tstruct, print, filter) \ |
Li Zefan | 7e4f44b | 2013-02-21 10:33:33 +0800 | [diff] [blame] | 129 | static int __init \ |
Steven Rostedt | 4e5292e | 2009-09-12 19:26:21 -0400 | [diff] [blame] | 130 | ftrace_define_fields_##name(struct ftrace_event_call *event_call) \ |
Tom Zanussi | e45f2e2 | 2009-03-31 00:49:16 -0500 | [diff] [blame] | 131 | { \ |
Steven Rostedt | 4e5292e | 2009-09-12 19:26:21 -0400 | [diff] [blame] | 132 | struct struct_name field; \ |
Tom Zanussi | e45f2e2 | 2009-03-31 00:49:16 -0500 | [diff] [blame] | 133 | int ret; \ |
Jiri Olsa | 02aa316 | 2012-02-15 15:51:53 +0100 | [diff] [blame] | 134 | int filter_type = filter; \ |
Tom Zanussi | e45f2e2 | 2009-03-31 00:49:16 -0500 | [diff] [blame] | 135 | \ |
Steven Rostedt | 4e5292e | 2009-09-12 19:26:21 -0400 | [diff] [blame] | 136 | tstruct; \ |
Tom Zanussi | e45f2e2 | 2009-03-31 00:49:16 -0500 | [diff] [blame] | 137 | \ |
| 138 | return ret; \ |
| 139 | } |
| 140 | |
Steven Rostedt | 4e5292e | 2009-09-12 19:26:21 -0400 | [diff] [blame] | 141 | #include "trace_entries.h" |
| 142 | |
Lai Jiangshan | 509e760 | 2009-12-15 15:39:42 +0800 | [diff] [blame] | 143 | #undef __entry |
| 144 | #define __entry REC |
| 145 | |
Steven Rostedt | 4e5292e | 2009-09-12 19:26:21 -0400 | [diff] [blame] | 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 | |
Lai Jiangshan | 509e760 | 2009-12-15 15:39:42 +0800 | [diff] [blame] | 161 | #undef F_printk |
Wolfgang Mauerer | 01de982 | 2012-03-22 11:18:20 +0100 | [diff] [blame] | 162 | #define F_printk(fmt, args...) __stringify(fmt) ", " __stringify(args) |
Lai Jiangshan | 509e760 | 2009-12-15 15:39:42 +0800 | [diff] [blame] | 163 | |
Jiri Olsa | e59a0bf | 2012-02-15 15:51:51 +0100 | [diff] [blame] | 164 | #undef FTRACE_ENTRY_REG |
Jiri Olsa | 02aa316 | 2012-02-15 15:51:53 +0100 | [diff] [blame] | 165 | #define FTRACE_ENTRY_REG(call, struct_name, etype, tstruct, print, filter,\ |
| 166 | regfn) \ |
Steven Rostedt | 770cb24 | 2009-03-05 21:35:29 -0500 | [diff] [blame] | 167 | \ |
Li Zefan | 523c811 | 2013-03-04 14:15:59 +0800 | [diff] [blame] | 168 | struct ftrace_event_class __refdata event_class_ftrace_##call = { \ |
Steven Rostedt | 2e33af0 | 2010-04-22 10:35:55 -0400 | [diff] [blame] | 169 | .system = __stringify(TRACE_SYSTEM), \ |
| 170 | .define_fields = ftrace_define_fields_##call, \ |
Li Zefan | ffb9f99 | 2010-05-24 16:24:52 +0800 | [diff] [blame] | 171 | .fields = LIST_HEAD_INIT(event_class_ftrace_##call.fields),\ |
Jiri Olsa | e59a0bf | 2012-02-15 15:51:51 +0100 | [diff] [blame] | 172 | .reg = regfn, \ |
Steven Rostedt | 2e33af0 | 2010-04-22 10:35:55 -0400 | [diff] [blame] | 173 | }; \ |
| 174 | \ |
Steven Rostedt | e4a9ea5 | 2011-01-27 09:15:30 -0500 | [diff] [blame] | 175 | struct ftrace_event_call __used event_##call = { \ |
Steven Rostedt | 2e33af0 | 2010-04-22 10:35:55 -0400 | [diff] [blame] | 176 | .class = &event_class_ftrace_##call, \ |
Mathieu Desnoyers | abb43f6 | 2014-04-09 17:06:08 -0400 | [diff] [blame] | 177 | { \ |
| 178 | .name = #call, \ |
| 179 | }, \ |
| 180 | .event.type = etype, \ |
Lai Jiangshan | 509e760 | 2009-12-15 15:39:42 +0800 | [diff] [blame] | 181 | .print_fmt = print, \ |
Tom Zanussi | f306cc8 | 2013-10-24 08:34:17 -0500 | [diff] [blame] | 182 | .flags = TRACE_EVENT_FL_IGNORE_ENABLE | TRACE_EVENT_FL_USE_CALL_FILTER, \ |
Tom Zanussi | e1112b4 | 2009-03-31 00:48:49 -0500 | [diff] [blame] | 183 | }; \ |
Steven Rostedt | e4a9ea5 | 2011-01-27 09:15:30 -0500 | [diff] [blame] | 184 | struct ftrace_event_call __used \ |
| 185 | __attribute__((section("_ftrace_events"))) *__event_##call = &event_##call; |
Tom Zanussi | e1112b4 | 2009-03-31 00:48:49 -0500 | [diff] [blame] | 186 | |
Jiri Olsa | e59a0bf | 2012-02-15 15:51:51 +0100 | [diff] [blame] | 187 | #undef FTRACE_ENTRY |
Jiri Olsa | 02aa316 | 2012-02-15 15:51:53 +0100 | [diff] [blame] | 188 | #define FTRACE_ENTRY(call, struct_name, etype, tstruct, print, filter) \ |
Jiri Olsa | e59a0bf | 2012-02-15 15:51:51 +0100 | [diff] [blame] | 189 | FTRACE_ENTRY_REG(call, struct_name, etype, \ |
Jiri Olsa | 02aa316 | 2012-02-15 15:51:53 +0100 | [diff] [blame] | 190 | PARAMS(tstruct), PARAMS(print), filter, NULL) |
Jiri Olsa | e59a0bf | 2012-02-15 15:51:51 +0100 | [diff] [blame] | 191 | |
Jiri Olsa | ced3900 | 2012-02-15 15:51:52 +0100 | [diff] [blame] | 192 | int ftrace_event_is_function(struct ftrace_event_call *call) |
| 193 | { |
| 194 | return call == &event_function; |
| 195 | } |
| 196 | |
Steven Rostedt | 4e5292e | 2009-09-12 19:26:21 -0400 | [diff] [blame] | 197 | #include "trace_entries.h" |