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 | |
Steven Rostedt | 4e5292e | 2009-09-12 19:26:21 -0400 | [diff] [blame] | 21 | /* not needed for this file */ |
| 22 | #undef __field_struct |
| 23 | #define __field_struct(type, item) |
Steven Rostedt | da4d030 | 2009-03-09 17:14:30 -0400 | [diff] [blame] | 24 | |
Steven Rostedt | 4e5292e | 2009-09-12 19:26:21 -0400 | [diff] [blame] | 25 | #undef __field |
Li Zefan | 05ffa2d | 2009-09-14 15:54:52 +0800 | [diff] [blame] | 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 | }; \ |
Li Zefan | 5e9b397 | 2009-11-02 08:51:13 +0800 | [diff] [blame] | 51 | static void __always_unused ____ftrace_check_##name(void) \ |
Li Zefan | 05ffa2d | 2009-09-14 15:54:52 +0800 | [diff] [blame] | 52 | { \ |
| 53 | struct ____ftrace_##name *__entry = NULL; \ |
| 54 | \ |
Li Zefan | 5e9b397 | 2009-11-02 08:51:13 +0800 | [diff] [blame] | 55 | /* force compile-time check on F_printk() */ \ |
Li Zefan | 05ffa2d | 2009-09-14 15:54:52 +0800 | [diff] [blame] | 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 | |
Steven Rostedt | 4e5292e | 2009-09-12 19:26:21 -0400 | [diff] [blame] | 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), \ |
Lai Jiangshan | fb7ae981 | 2009-12-15 15:39:38 +0800 | [diff] [blame] | 89 | sizeof(field.item), \ |
| 90 | is_signed_type(type), FILTER_OTHER); \ |
Steven Rostedt | 4e5292e | 2009-09-12 19:26:21 -0400 | [diff] [blame] | 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), \ |
Lai Jiangshan | fb7ae981 | 2009-12-15 15:39:38 +0800 | [diff] [blame] | 100 | sizeof(field.container.item), \ |
| 101 | is_signed_type(type), FILTER_OTHER); \ |
Steven Rostedt | 4e5292e | 2009-09-12 19:26:21 -0400 | [diff] [blame] | 102 | if (ret) \ |
| 103 | return ret; |
| 104 | |
| 105 | #undef __dynamic_array |
Lai Jiangshan | 809826a | 2009-12-15 15:39:34 +0800 | [diff] [blame] | 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; |
Steven Rostedt | 4e5292e | 2009-09-12 19:26:21 -0400 | [diff] [blame] | 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) \ |
Tom Zanussi | e45f2e2 | 2009-03-31 00:49:16 -0500 | [diff] [blame] | 117 | { \ |
Steven Rostedt | 4e5292e | 2009-09-12 19:26:21 -0400 | [diff] [blame] | 118 | struct struct_name field; \ |
Tom Zanussi | e45f2e2 | 2009-03-31 00:49:16 -0500 | [diff] [blame] | 119 | int ret; \ |
| 120 | \ |
Steven Rostedt | 4e5292e | 2009-09-12 19:26:21 -0400 | [diff] [blame] | 121 | tstruct; \ |
Tom Zanussi | e45f2e2 | 2009-03-31 00:49:16 -0500 | [diff] [blame] | 122 | \ |
| 123 | return ret; \ |
| 124 | } |
| 125 | |
Steven Rostedt | 4e5292e | 2009-09-12 19:26:21 -0400 | [diff] [blame] | 126 | #include "trace_entries.h" |
| 127 | |
Lai Jiangshan | 509e760 | 2009-12-15 15:39:42 +0800 | [diff] [blame] | 128 | #undef __entry |
| 129 | #define __entry REC |
| 130 | |
Steven Rostedt | 4e5292e | 2009-09-12 19:26:21 -0400 | [diff] [blame] | 131 | #undef __field |
| 132 | #define __field(type, item) |
| 133 | |
| 134 | #undef __field_desc |
| 135 | #define __field_desc(type, container, item) |
| 136 | |
| 137 | #undef __array |
| 138 | #define __array(type, item, len) |
| 139 | |
| 140 | #undef __array_desc |
| 141 | #define __array_desc(type, container, item, len) |
| 142 | |
| 143 | #undef __dynamic_array |
| 144 | #define __dynamic_array(type, item) |
| 145 | |
Lai Jiangshan | 509e760 | 2009-12-15 15:39:42 +0800 | [diff] [blame] | 146 | #undef F_printk |
| 147 | #define F_printk(fmt, args...) #fmt ", " __stringify(args) |
| 148 | |
Steven Rostedt | 4e5292e | 2009-09-12 19:26:21 -0400 | [diff] [blame] | 149 | #undef FTRACE_ENTRY |
Steven Rostedt | 32c0eda | 2010-04-23 10:38:03 -0400 | [diff] [blame] | 150 | #define FTRACE_ENTRY(call, struct_name, etype, tstruct, print) \ |
Steven Rostedt | 770cb24 | 2009-03-05 21:35:29 -0500 | [diff] [blame] | 151 | \ |
Steven Rostedt | 2e33af0 | 2010-04-22 10:35:55 -0400 | [diff] [blame] | 152 | struct ftrace_event_class event_class_ftrace_##call = { \ |
| 153 | .system = __stringify(TRACE_SYSTEM), \ |
| 154 | .define_fields = ftrace_define_fields_##call, \ |
Li Zefan | ffb9f99 | 2010-05-24 16:24:52 +0800 | [diff] [blame] | 155 | .fields = LIST_HEAD_INIT(event_class_ftrace_##call.fields),\ |
Steven Rostedt | 2e33af0 | 2010-04-22 10:35:55 -0400 | [diff] [blame] | 156 | }; \ |
| 157 | \ |
Tom Zanussi | e1112b4 | 2009-03-31 00:48:49 -0500 | [diff] [blame] | 158 | struct ftrace_event_call __used \ |
Steven Rostedt | 770cb24 | 2009-03-05 21:35:29 -0500 | [diff] [blame] | 159 | __attribute__((__aligned__(4))) \ |
| 160 | __attribute__((section("_ftrace_events"))) event_##call = { \ |
Steven Rostedt | ef18012 | 2009-03-10 14:10:56 -0400 | [diff] [blame] | 161 | .name = #call, \ |
Steven Rostedt | 32c0eda | 2010-04-23 10:38:03 -0400 | [diff] [blame] | 162 | .event.type = etype, \ |
Steven Rostedt | 2e33af0 | 2010-04-22 10:35:55 -0400 | [diff] [blame] | 163 | .class = &event_class_ftrace_##call, \ |
Lai Jiangshan | 509e760 | 2009-12-15 15:39:42 +0800 | [diff] [blame] | 164 | .print_fmt = print, \ |
Tom Zanussi | e1112b4 | 2009-03-31 00:48:49 -0500 | [diff] [blame] | 165 | }; \ |
Tom Zanussi | e1112b4 | 2009-03-31 00:48:49 -0500 | [diff] [blame] | 166 | |
Steven Rostedt | 4e5292e | 2009-09-12 19:26:21 -0400 | [diff] [blame] | 167 | #include "trace_entries.h" |