Steven Rostedt | f42c85e | 2009-04-13 12:25:37 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Stage 1 of the trace events. |
| 3 | * |
| 4 | * Override the macros in <trace/trace_events.h> to include the following: |
| 5 | * |
| 6 | * struct ftrace_raw_<call> { |
| 7 | * struct trace_entry ent; |
| 8 | * <type> <item>; |
| 9 | * <type2> <item2>[<len>]; |
| 10 | * [...] |
| 11 | * }; |
| 12 | * |
| 13 | * The <type> <item> is created by the __field(type, item) macro or |
| 14 | * the __array(type2, item2, len) macro. |
| 15 | * We simply do "type item;", and that will create the fields |
| 16 | * in the structure. |
| 17 | */ |
| 18 | |
| 19 | #include <linux/ftrace_event.h> |
| 20 | |
Steven Rostedt | f42c85e | 2009-04-13 12:25:37 -0400 | [diff] [blame] | 21 | #undef __field |
| 22 | #define __field(type, item) type item; |
| 23 | |
Li Zefan | 7fcb7c4 | 2009-06-01 15:35:46 +0800 | [diff] [blame] | 24 | #undef __array |
| 25 | #define __array(type, item, len) type item[len]; |
| 26 | |
| 27 | #undef __dynamic_array |
Li Zefan | 7d536cb | 2009-07-16 10:54:02 +0800 | [diff] [blame] | 28 | #define __dynamic_array(type, item, len) u32 __data_loc_##item; |
Li Zefan | 7fcb7c4 | 2009-06-01 15:35:46 +0800 | [diff] [blame] | 29 | |
Frederic Weisbecker | 9cbf117 | 2009-04-19 04:51:29 +0200 | [diff] [blame] | 30 | #undef __string |
Li Zefan | 7fcb7c4 | 2009-06-01 15:35:46 +0800 | [diff] [blame] | 31 | #define __string(item, src) __dynamic_array(char, item, -1) |
Frederic Weisbecker | 9cbf117 | 2009-04-19 04:51:29 +0200 | [diff] [blame] | 32 | |
Steven Rostedt | f42c85e | 2009-04-13 12:25:37 -0400 | [diff] [blame] | 33 | #undef TP_STRUCT__entry |
| 34 | #define TP_STRUCT__entry(args...) args |
| 35 | |
| 36 | #undef TRACE_EVENT |
| 37 | #define TRACE_EVENT(name, proto, args, tstruct, assign, print) \ |
| 38 | struct ftrace_raw_##name { \ |
| 39 | struct trace_entry ent; \ |
| 40 | tstruct \ |
Li Zefan | 7fcb7c4 | 2009-06-01 15:35:46 +0800 | [diff] [blame] | 41 | char __data[0]; \ |
Steven Rostedt | f42c85e | 2009-04-13 12:25:37 -0400 | [diff] [blame] | 42 | }; \ |
| 43 | static struct ftrace_event_call event_##name |
| 44 | |
| 45 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| 46 | |
Frederic Weisbecker | 9cbf117 | 2009-04-19 04:51:29 +0200 | [diff] [blame] | 47 | |
Steven Rostedt | f42c85e | 2009-04-13 12:25:37 -0400 | [diff] [blame] | 48 | /* |
| 49 | * Stage 2 of the trace events. |
| 50 | * |
Frederic Weisbecker | 9cbf117 | 2009-04-19 04:51:29 +0200 | [diff] [blame] | 51 | * Include the following: |
| 52 | * |
Li Zefan | 7fcb7c4 | 2009-06-01 15:35:46 +0800 | [diff] [blame] | 53 | * struct ftrace_data_offsets_<call> { |
Li Zefan | 7d536cb | 2009-07-16 10:54:02 +0800 | [diff] [blame] | 54 | * u32 <item1>; |
| 55 | * u32 <item2>; |
Frederic Weisbecker | 9cbf117 | 2009-04-19 04:51:29 +0200 | [diff] [blame] | 56 | * [...] |
| 57 | * }; |
| 58 | * |
Li Zefan | 7d536cb | 2009-07-16 10:54:02 +0800 | [diff] [blame] | 59 | * The __dynamic_array() macro will create each u32 <item>, this is |
Li Zefan | 7fcb7c4 | 2009-06-01 15:35:46 +0800 | [diff] [blame] | 60 | * to keep the offset of each array from the beginning of the event. |
Li Zefan | 7d536cb | 2009-07-16 10:54:02 +0800 | [diff] [blame] | 61 | * The size of an array is also encoded, in the higher 16 bits of <item>. |
Frederic Weisbecker | 9cbf117 | 2009-04-19 04:51:29 +0200 | [diff] [blame] | 62 | */ |
| 63 | |
Frederic Weisbecker | 9cbf117 | 2009-04-19 04:51:29 +0200 | [diff] [blame] | 64 | #undef __field |
| 65 | #define __field(type, item); |
| 66 | |
Li Zefan | 7fcb7c4 | 2009-06-01 15:35:46 +0800 | [diff] [blame] | 67 | #undef __array |
| 68 | #define __array(type, item, len) |
| 69 | |
| 70 | #undef __dynamic_array |
Li Zefan | 7d536cb | 2009-07-16 10:54:02 +0800 | [diff] [blame] | 71 | #define __dynamic_array(type, item, len) u32 item; |
Li Zefan | 7fcb7c4 | 2009-06-01 15:35:46 +0800 | [diff] [blame] | 72 | |
Frederic Weisbecker | 9cbf117 | 2009-04-19 04:51:29 +0200 | [diff] [blame] | 73 | #undef __string |
Li Zefan | 7fcb7c4 | 2009-06-01 15:35:46 +0800 | [diff] [blame] | 74 | #define __string(item, src) __dynamic_array(char, item, -1) |
Frederic Weisbecker | 9cbf117 | 2009-04-19 04:51:29 +0200 | [diff] [blame] | 75 | |
| 76 | #undef TRACE_EVENT |
| 77 | #define TRACE_EVENT(call, proto, args, tstruct, assign, print) \ |
Li Zefan | 7fcb7c4 | 2009-06-01 15:35:46 +0800 | [diff] [blame] | 78 | struct ftrace_data_offsets_##call { \ |
Frederic Weisbecker | 9cbf117 | 2009-04-19 04:51:29 +0200 | [diff] [blame] | 79 | tstruct; \ |
| 80 | }; |
| 81 | |
| 82 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| 83 | |
| 84 | /* |
Steven Rostedt | 6ff9a64 | 2009-06-10 14:28:34 -0400 | [diff] [blame] | 85 | * Setup the showing format of trace point. |
| 86 | * |
| 87 | * int |
| 88 | * ftrace_format_##call(struct trace_seq *s) |
| 89 | * { |
| 90 | * struct ftrace_raw_##call field; |
| 91 | * int ret; |
| 92 | * |
| 93 | * ret = trace_seq_printf(s, #type " " #item ";" |
| 94 | * " offset:%u; size:%u;\n", |
| 95 | * offsetof(struct ftrace_raw_##call, item), |
| 96 | * sizeof(field.type)); |
| 97 | * |
| 98 | * } |
| 99 | */ |
| 100 | |
| 101 | #undef TP_STRUCT__entry |
| 102 | #define TP_STRUCT__entry(args...) args |
| 103 | |
| 104 | #undef __field |
| 105 | #define __field(type, item) \ |
| 106 | ret = trace_seq_printf(s, "\tfield:" #type " " #item ";\t" \ |
| 107 | "offset:%u;\tsize:%u;\n", \ |
| 108 | (unsigned int)offsetof(typeof(field), item), \ |
| 109 | (unsigned int)sizeof(field.item)); \ |
| 110 | if (!ret) \ |
| 111 | return 0; |
| 112 | |
| 113 | #undef __array |
| 114 | #define __array(type, item, len) \ |
| 115 | ret = trace_seq_printf(s, "\tfield:" #type " " #item "[" #len "];\t" \ |
| 116 | "offset:%u;\tsize:%u;\n", \ |
| 117 | (unsigned int)offsetof(typeof(field), item), \ |
| 118 | (unsigned int)sizeof(field.item)); \ |
| 119 | if (!ret) \ |
| 120 | return 0; |
| 121 | |
| 122 | #undef __dynamic_array |
| 123 | #define __dynamic_array(type, item, len) \ |
Lai Jiangshan | 68fd60a | 2009-07-16 10:53:34 +0800 | [diff] [blame] | 124 | ret = trace_seq_printf(s, "\tfield:__data_loc " #type "[] " #item ";\t"\ |
Steven Rostedt | 6ff9a64 | 2009-06-10 14:28:34 -0400 | [diff] [blame] | 125 | "offset:%u;\tsize:%u;\n", \ |
| 126 | (unsigned int)offsetof(typeof(field), \ |
| 127 | __data_loc_##item), \ |
| 128 | (unsigned int)sizeof(field.__data_loc_##item)); \ |
| 129 | if (!ret) \ |
| 130 | return 0; |
| 131 | |
| 132 | #undef __string |
| 133 | #define __string(item, src) __dynamic_array(char, item, -1) |
| 134 | |
| 135 | #undef __entry |
| 136 | #define __entry REC |
| 137 | |
| 138 | #undef __print_symbolic |
| 139 | #undef __get_dynamic_array |
| 140 | #undef __get_str |
| 141 | |
| 142 | #undef TP_printk |
| 143 | #define TP_printk(fmt, args...) "%s, %s\n", #fmt, __stringify(args) |
| 144 | |
| 145 | #undef TP_fast_assign |
| 146 | #define TP_fast_assign(args...) args |
| 147 | |
Peter Zijlstra | 3a65930 | 2009-07-21 17:34:57 +0200 | [diff] [blame] | 148 | #undef TP_perf_assign |
| 149 | #define TP_perf_assign(args...) |
| 150 | |
Steven Rostedt | 6ff9a64 | 2009-06-10 14:28:34 -0400 | [diff] [blame] | 151 | #undef TRACE_EVENT |
| 152 | #define TRACE_EVENT(call, proto, args, tstruct, func, print) \ |
| 153 | static int \ |
| 154 | ftrace_format_##call(struct trace_seq *s) \ |
| 155 | { \ |
| 156 | struct ftrace_raw_##call field __attribute__((unused)); \ |
| 157 | int ret = 0; \ |
| 158 | \ |
| 159 | tstruct; \ |
| 160 | \ |
| 161 | trace_seq_printf(s, "\nprint fmt: " print); \ |
| 162 | \ |
| 163 | return ret; \ |
| 164 | } |
| 165 | |
| 166 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| 167 | |
| 168 | /* |
Frederic Weisbecker | 9cbf117 | 2009-04-19 04:51:29 +0200 | [diff] [blame] | 169 | * Stage 3 of the trace events. |
| 170 | * |
Steven Rostedt | f42c85e | 2009-04-13 12:25:37 -0400 | [diff] [blame] | 171 | * Override the macros in <trace/trace_events.h> to include the following: |
| 172 | * |
| 173 | * enum print_line_t |
| 174 | * ftrace_raw_output_<call>(struct trace_iterator *iter, int flags) |
| 175 | * { |
| 176 | * struct trace_seq *s = &iter->seq; |
| 177 | * struct ftrace_raw_<call> *field; <-- defined in stage 1 |
| 178 | * struct trace_entry *entry; |
Steven Rostedt | be74b73 | 2009-05-26 20:25:22 +0200 | [diff] [blame] | 179 | * struct trace_seq *p; |
Steven Rostedt | f42c85e | 2009-04-13 12:25:37 -0400 | [diff] [blame] | 180 | * int ret; |
| 181 | * |
| 182 | * entry = iter->ent; |
| 183 | * |
| 184 | * if (entry->type != event_<call>.id) { |
| 185 | * WARN_ON_ONCE(1); |
| 186 | * return TRACE_TYPE_UNHANDLED; |
| 187 | * } |
| 188 | * |
| 189 | * field = (typeof(field))entry; |
| 190 | * |
Steven Rostedt | be74b73 | 2009-05-26 20:25:22 +0200 | [diff] [blame] | 191 | * p = get_cpu_var(ftrace_event_seq); |
Steven Whitehouse | 56d8bd3 | 2009-06-03 14:52:03 +0100 | [diff] [blame] | 192 | * trace_seq_init(p); |
Steven Rostedt | f42c85e | 2009-04-13 12:25:37 -0400 | [diff] [blame] | 193 | * ret = trace_seq_printf(s, <TP_printk> "\n"); |
Steven Rostedt | be74b73 | 2009-05-26 20:25:22 +0200 | [diff] [blame] | 194 | * put_cpu(); |
Steven Rostedt | f42c85e | 2009-04-13 12:25:37 -0400 | [diff] [blame] | 195 | * if (!ret) |
| 196 | * return TRACE_TYPE_PARTIAL_LINE; |
| 197 | * |
| 198 | * return TRACE_TYPE_HANDLED; |
| 199 | * } |
| 200 | * |
| 201 | * This is the method used to print the raw event to the trace |
| 202 | * output format. Note, this is not needed if the data is read |
| 203 | * in binary. |
| 204 | */ |
| 205 | |
| 206 | #undef __entry |
| 207 | #define __entry field |
| 208 | |
| 209 | #undef TP_printk |
| 210 | #define TP_printk(fmt, args...) fmt "\n", args |
| 211 | |
Li Zefan | 7fcb7c4 | 2009-06-01 15:35:46 +0800 | [diff] [blame] | 212 | #undef __get_dynamic_array |
| 213 | #define __get_dynamic_array(field) \ |
Li Zefan | 7d536cb | 2009-07-16 10:54:02 +0800 | [diff] [blame] | 214 | ((void *)__entry + (__entry->__data_loc_##field & 0xffff)) |
Li Zefan | 7fcb7c4 | 2009-06-01 15:35:46 +0800 | [diff] [blame] | 215 | |
Frederic Weisbecker | 9cbf117 | 2009-04-19 04:51:29 +0200 | [diff] [blame] | 216 | #undef __get_str |
Li Zefan | 7fcb7c4 | 2009-06-01 15:35:46 +0800 | [diff] [blame] | 217 | #define __get_str(field) (char *)__get_dynamic_array(field) |
Frederic Weisbecker | 9cbf117 | 2009-04-19 04:51:29 +0200 | [diff] [blame] | 218 | |
Steven Rostedt | be74b73 | 2009-05-26 20:25:22 +0200 | [diff] [blame] | 219 | #undef __print_flags |
| 220 | #define __print_flags(flag, delim, flag_array...) \ |
| 221 | ({ \ |
| 222 | static const struct trace_print_flags flags[] = \ |
| 223 | { flag_array, { -1, NULL }}; \ |
| 224 | ftrace_print_flags_seq(p, delim, flag, flags); \ |
| 225 | }) |
| 226 | |
Steven Rostedt | 0f4fc29 | 2009-05-20 19:21:47 -0400 | [diff] [blame] | 227 | #undef __print_symbolic |
| 228 | #define __print_symbolic(value, symbol_array...) \ |
| 229 | ({ \ |
| 230 | static const struct trace_print_flags symbols[] = \ |
| 231 | { symbol_array, { -1, NULL }}; \ |
| 232 | ftrace_print_symbols_seq(p, value, symbols); \ |
| 233 | }) |
| 234 | |
Steven Rostedt | f42c85e | 2009-04-13 12:25:37 -0400 | [diff] [blame] | 235 | #undef TRACE_EVENT |
| 236 | #define TRACE_EVENT(call, proto, args, tstruct, assign, print) \ |
| 237 | enum print_line_t \ |
| 238 | ftrace_raw_output_##call(struct trace_iterator *iter, int flags) \ |
| 239 | { \ |
| 240 | struct trace_seq *s = &iter->seq; \ |
| 241 | struct ftrace_raw_##call *field; \ |
| 242 | struct trace_entry *entry; \ |
Steven Rostedt | be74b73 | 2009-05-26 20:25:22 +0200 | [diff] [blame] | 243 | struct trace_seq *p; \ |
Steven Rostedt | f42c85e | 2009-04-13 12:25:37 -0400 | [diff] [blame] | 244 | int ret; \ |
| 245 | \ |
| 246 | entry = iter->ent; \ |
| 247 | \ |
| 248 | if (entry->type != event_##call.id) { \ |
| 249 | WARN_ON_ONCE(1); \ |
| 250 | return TRACE_TYPE_UNHANDLED; \ |
| 251 | } \ |
| 252 | \ |
| 253 | field = (typeof(field))entry; \ |
| 254 | \ |
Steven Rostedt | be74b73 | 2009-05-26 20:25:22 +0200 | [diff] [blame] | 255 | p = &get_cpu_var(ftrace_event_seq); \ |
Steven Whitehouse | 56d8bd3 | 2009-06-03 14:52:03 +0100 | [diff] [blame] | 256 | trace_seq_init(p); \ |
Steven Rostedt | f42c85e | 2009-04-13 12:25:37 -0400 | [diff] [blame] | 257 | ret = trace_seq_printf(s, #call ": " print); \ |
Steven Rostedt | be74b73 | 2009-05-26 20:25:22 +0200 | [diff] [blame] | 258 | put_cpu(); \ |
Steven Rostedt | f42c85e | 2009-04-13 12:25:37 -0400 | [diff] [blame] | 259 | if (!ret) \ |
| 260 | return TRACE_TYPE_PARTIAL_LINE; \ |
| 261 | \ |
| 262 | return TRACE_TYPE_HANDLED; \ |
| 263 | } |
| 264 | |
| 265 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| 266 | |
Steven Rostedt | f42c85e | 2009-04-13 12:25:37 -0400 | [diff] [blame] | 267 | #undef __field |
| 268 | #define __field(type, item) \ |
| 269 | ret = trace_define_field(event_call, #type, #item, \ |
| 270 | offsetof(typeof(field), item), \ |
Tom Zanussi | a118e4d | 2009-04-28 03:04:53 -0500 | [diff] [blame] | 271 | sizeof(field.item), is_signed_type(type)); \ |
Steven Rostedt | f42c85e | 2009-04-13 12:25:37 -0400 | [diff] [blame] | 272 | if (ret) \ |
| 273 | return ret; |
| 274 | |
| 275 | #undef __array |
| 276 | #define __array(type, item, len) \ |
| 277 | BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \ |
| 278 | ret = trace_define_field(event_call, #type "[" #len "]", #item, \ |
| 279 | offsetof(typeof(field), item), \ |
Tom Zanussi | a118e4d | 2009-04-28 03:04:53 -0500 | [diff] [blame] | 280 | sizeof(field.item), 0); \ |
Steven Rostedt | f42c85e | 2009-04-13 12:25:37 -0400 | [diff] [blame] | 281 | if (ret) \ |
| 282 | return ret; |
| 283 | |
Li Zefan | 7fcb7c4 | 2009-06-01 15:35:46 +0800 | [diff] [blame] | 284 | #undef __dynamic_array |
| 285 | #define __dynamic_array(type, item, len) \ |
Lai Jiangshan | 68fd60a | 2009-07-16 10:53:34 +0800 | [diff] [blame] | 286 | ret = trace_define_field(event_call, "__data_loc " #type "[]", #item, \ |
Li Zefan | 7fcb7c4 | 2009-06-01 15:35:46 +0800 | [diff] [blame] | 287 | offsetof(typeof(field), __data_loc_##item), \ |
| 288 | sizeof(field.__data_loc_##item), 0); |
| 289 | |
Frederic Weisbecker | 9cbf117 | 2009-04-19 04:51:29 +0200 | [diff] [blame] | 290 | #undef __string |
Li Zefan | 7fcb7c4 | 2009-06-01 15:35:46 +0800 | [diff] [blame] | 291 | #define __string(item, src) __dynamic_array(char, item, -1) |
Frederic Weisbecker | 9cbf117 | 2009-04-19 04:51:29 +0200 | [diff] [blame] | 292 | |
Steven Rostedt | f42c85e | 2009-04-13 12:25:37 -0400 | [diff] [blame] | 293 | #undef TRACE_EVENT |
| 294 | #define TRACE_EVENT(call, proto, args, tstruct, func, print) \ |
| 295 | int \ |
| 296 | ftrace_define_fields_##call(void) \ |
| 297 | { \ |
| 298 | struct ftrace_raw_##call field; \ |
| 299 | struct ftrace_event_call *event_call = &event_##call; \ |
| 300 | int ret; \ |
| 301 | \ |
Tom Zanussi | a118e4d | 2009-04-28 03:04:53 -0500 | [diff] [blame] | 302 | __common_field(int, type, 1); \ |
| 303 | __common_field(unsigned char, flags, 0); \ |
| 304 | __common_field(unsigned char, preempt_count, 0); \ |
| 305 | __common_field(int, pid, 1); \ |
| 306 | __common_field(int, tgid, 1); \ |
Steven Rostedt | f42c85e | 2009-04-13 12:25:37 -0400 | [diff] [blame] | 307 | \ |
| 308 | tstruct; \ |
| 309 | \ |
| 310 | return ret; \ |
| 311 | } |
| 312 | |
| 313 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| 314 | |
| 315 | /* |
Li Zefan | 7fcb7c4 | 2009-06-01 15:35:46 +0800 | [diff] [blame] | 316 | * remember the offset of each array from the beginning of the event. |
| 317 | */ |
| 318 | |
| 319 | #undef __entry |
| 320 | #define __entry entry |
| 321 | |
| 322 | #undef __field |
| 323 | #define __field(type, item) |
| 324 | |
| 325 | #undef __array |
| 326 | #define __array(type, item, len) |
| 327 | |
| 328 | #undef __dynamic_array |
| 329 | #define __dynamic_array(type, item, len) \ |
| 330 | __data_offsets->item = __data_size + \ |
| 331 | offsetof(typeof(*entry), __data); \ |
Li Zefan | 7d536cb | 2009-07-16 10:54:02 +0800 | [diff] [blame] | 332 | __data_offsets->item |= (len * sizeof(type)) << 16; \ |
Li Zefan | 7fcb7c4 | 2009-06-01 15:35:46 +0800 | [diff] [blame] | 333 | __data_size += (len) * sizeof(type); |
| 334 | |
| 335 | #undef __string |
| 336 | #define __string(item, src) __dynamic_array(char, item, strlen(src) + 1) \ |
| 337 | |
| 338 | #undef TRACE_EVENT |
| 339 | #define TRACE_EVENT(call, proto, args, tstruct, assign, print) \ |
| 340 | static inline int ftrace_get_offsets_##call( \ |
| 341 | struct ftrace_data_offsets_##call *__data_offsets, proto) \ |
| 342 | { \ |
| 343 | int __data_size = 0; \ |
| 344 | struct ftrace_raw_##call __maybe_unused *entry; \ |
| 345 | \ |
| 346 | tstruct; \ |
| 347 | \ |
| 348 | return __data_size; \ |
| 349 | } |
| 350 | |
| 351 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| 352 | |
Peter Zijlstra | 3a65930 | 2009-07-21 17:34:57 +0200 | [diff] [blame] | 353 | #ifdef CONFIG_EVENT_PROFILE |
| 354 | |
| 355 | /* |
| 356 | * Generate the functions needed for tracepoint perf_counter support. |
| 357 | * |
Frederic Weisbecker | f413cdb | 2009-08-07 01:25:54 +0200 | [diff] [blame] | 358 | * NOTE: The insertion profile callback (ftrace_profile_<call>) is defined later |
Peter Zijlstra | 3a65930 | 2009-07-21 17:34:57 +0200 | [diff] [blame] | 359 | * |
| 360 | * static int ftrace_profile_enable_<call>(struct ftrace_event_call *event_call) |
| 361 | * { |
| 362 | * int ret = 0; |
| 363 | * |
| 364 | * if (!atomic_inc_return(&event_call->profile_count)) |
| 365 | * ret = register_trace_<call>(ftrace_profile_<call>); |
| 366 | * |
| 367 | * return ret; |
| 368 | * } |
| 369 | * |
| 370 | * static void ftrace_profile_disable_<call>(struct ftrace_event_call *event_call) |
| 371 | * { |
| 372 | * if (atomic_add_negative(-1, &event->call->profile_count)) |
| 373 | * unregister_trace_<call>(ftrace_profile_<call>); |
| 374 | * } |
| 375 | * |
| 376 | */ |
| 377 | |
Peter Zijlstra | 3a65930 | 2009-07-21 17:34:57 +0200 | [diff] [blame] | 378 | #undef TRACE_EVENT |
| 379 | #define TRACE_EVENT(call, proto, args, tstruct, assign, print) \ |
| 380 | \ |
Frederic Weisbecker | f413cdb | 2009-08-07 01:25:54 +0200 | [diff] [blame] | 381 | static void ftrace_profile_##call(proto); \ |
Peter Zijlstra | 3a65930 | 2009-07-21 17:34:57 +0200 | [diff] [blame] | 382 | \ |
| 383 | static int ftrace_profile_enable_##call(struct ftrace_event_call *event_call) \ |
| 384 | { \ |
| 385 | int ret = 0; \ |
| 386 | \ |
| 387 | if (!atomic_inc_return(&event_call->profile_count)) \ |
| 388 | ret = register_trace_##call(ftrace_profile_##call); \ |
| 389 | \ |
| 390 | return ret; \ |
| 391 | } \ |
| 392 | \ |
| 393 | static void ftrace_profile_disable_##call(struct ftrace_event_call *event_call)\ |
| 394 | { \ |
| 395 | if (atomic_add_negative(-1, &event_call->profile_count)) \ |
| 396 | unregister_trace_##call(ftrace_profile_##call); \ |
| 397 | } |
| 398 | |
| 399 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| 400 | |
Peter Zijlstra | 3a65930 | 2009-07-21 17:34:57 +0200 | [diff] [blame] | 401 | #endif |
| 402 | |
Li Zefan | 7fcb7c4 | 2009-06-01 15:35:46 +0800 | [diff] [blame] | 403 | /* |
Frederic Weisbecker | 9cbf117 | 2009-04-19 04:51:29 +0200 | [diff] [blame] | 404 | * Stage 4 of the trace events. |
Steven Rostedt | f42c85e | 2009-04-13 12:25:37 -0400 | [diff] [blame] | 405 | * |
| 406 | * Override the macros in <trace/trace_events.h> to include the following: |
| 407 | * |
| 408 | * static void ftrace_event_<call>(proto) |
| 409 | * { |
| 410 | * event_trace_printk(_RET_IP_, "<call>: " <fmt>); |
| 411 | * } |
| 412 | * |
| 413 | * static int ftrace_reg_event_<call>(void) |
| 414 | * { |
| 415 | * int ret; |
| 416 | * |
| 417 | * ret = register_trace_<call>(ftrace_event_<call>); |
| 418 | * if (!ret) |
| 419 | * pr_info("event trace: Could not activate trace point " |
| 420 | * "probe to <call>"); |
| 421 | * return ret; |
| 422 | * } |
| 423 | * |
| 424 | * static void ftrace_unreg_event_<call>(void) |
| 425 | * { |
| 426 | * unregister_trace_<call>(ftrace_event_<call>); |
| 427 | * } |
| 428 | * |
Steven Rostedt | f42c85e | 2009-04-13 12:25:37 -0400 | [diff] [blame] | 429 | * |
| 430 | * For those macros defined with TRACE_EVENT: |
| 431 | * |
| 432 | * static struct ftrace_event_call event_<call>; |
| 433 | * |
| 434 | * static void ftrace_raw_event_<call>(proto) |
| 435 | * { |
| 436 | * struct ring_buffer_event *event; |
| 437 | * struct ftrace_raw_<call> *entry; <-- defined in stage 1 |
| 438 | * unsigned long irq_flags; |
| 439 | * int pc; |
| 440 | * |
| 441 | * local_save_flags(irq_flags); |
| 442 | * pc = preempt_count(); |
| 443 | * |
| 444 | * event = trace_current_buffer_lock_reserve(event_<call>.id, |
| 445 | * sizeof(struct ftrace_raw_<call>), |
| 446 | * irq_flags, pc); |
| 447 | * if (!event) |
| 448 | * return; |
| 449 | * entry = ring_buffer_event_data(event); |
| 450 | * |
| 451 | * <assign>; <-- Here we assign the entries by the __field and |
| 452 | * __array macros. |
| 453 | * |
| 454 | * trace_current_buffer_unlock_commit(event, irq_flags, pc); |
| 455 | * } |
| 456 | * |
| 457 | * static int ftrace_raw_reg_event_<call>(void) |
| 458 | * { |
| 459 | * int ret; |
| 460 | * |
| 461 | * ret = register_trace_<call>(ftrace_raw_event_<call>); |
| 462 | * if (!ret) |
| 463 | * pr_info("event trace: Could not activate trace point " |
| 464 | * "probe to <call>"); |
| 465 | * return ret; |
| 466 | * } |
| 467 | * |
| 468 | * static void ftrace_unreg_event_<call>(void) |
| 469 | * { |
| 470 | * unregister_trace_<call>(ftrace_raw_event_<call>); |
| 471 | * } |
| 472 | * |
| 473 | * static struct trace_event ftrace_event_type_<call> = { |
| 474 | * .trace = ftrace_raw_output_<call>, <-- stage 2 |
| 475 | * }; |
| 476 | * |
| 477 | * static int ftrace_raw_init_event_<call>(void) |
| 478 | * { |
| 479 | * int id; |
| 480 | * |
| 481 | * id = register_ftrace_event(&ftrace_event_type_<call>); |
| 482 | * if (!id) |
| 483 | * return -ENODEV; |
| 484 | * event_<call>.id = id; |
| 485 | * return 0; |
| 486 | * } |
| 487 | * |
| 488 | * static struct ftrace_event_call __used |
| 489 | * __attribute__((__aligned__(4))) |
| 490 | * __attribute__((section("_ftrace_events"))) event_<call> = { |
| 491 | * .name = "<call>", |
| 492 | * .system = "<system>", |
| 493 | * .raw_init = ftrace_raw_init_event_<call>, |
| 494 | * .regfunc = ftrace_reg_event_<call>, |
| 495 | * .unregfunc = ftrace_unreg_event_<call>, |
| 496 | * .show_format = ftrace_format_<call>, |
| 497 | * } |
| 498 | * |
| 499 | */ |
| 500 | |
| 501 | #undef TP_FMT |
| 502 | #define TP_FMT(fmt, args...) fmt "\n", ##args |
| 503 | |
| 504 | #ifdef CONFIG_EVENT_PROFILE |
Steven Rostedt | f42c85e | 2009-04-13 12:25:37 -0400 | [diff] [blame] | 505 | |
| 506 | #define _TRACE_PROFILE_INIT(call) \ |
| 507 | .profile_count = ATOMIC_INIT(-1), \ |
| 508 | .profile_enable = ftrace_profile_enable_##call, \ |
| 509 | .profile_disable = ftrace_profile_disable_##call, |
| 510 | |
| 511 | #else |
Steven Rostedt | f42c85e | 2009-04-13 12:25:37 -0400 | [diff] [blame] | 512 | #define _TRACE_PROFILE_INIT(call) |
| 513 | #endif |
| 514 | |
Steven Rostedt | f42c85e | 2009-04-13 12:25:37 -0400 | [diff] [blame] | 515 | #undef __entry |
| 516 | #define __entry entry |
| 517 | |
Frederic Weisbecker | 9cbf117 | 2009-04-19 04:51:29 +0200 | [diff] [blame] | 518 | #undef __field |
| 519 | #define __field(type, item) |
| 520 | |
| 521 | #undef __array |
| 522 | #define __array(type, item, len) |
| 523 | |
Li Zefan | 7fcb7c4 | 2009-06-01 15:35:46 +0800 | [diff] [blame] | 524 | #undef __dynamic_array |
| 525 | #define __dynamic_array(type, item, len) \ |
| 526 | __entry->__data_loc_##item = __data_offsets.item; |
| 527 | |
Frederic Weisbecker | 9cbf117 | 2009-04-19 04:51:29 +0200 | [diff] [blame] | 528 | #undef __string |
Li Zefan | 7fcb7c4 | 2009-06-01 15:35:46 +0800 | [diff] [blame] | 529 | #define __string(item, src) __dynamic_array(char, item, -1) \ |
Frederic Weisbecker | 9cbf117 | 2009-04-19 04:51:29 +0200 | [diff] [blame] | 530 | |
| 531 | #undef __assign_str |
| 532 | #define __assign_str(dst, src) \ |
Frederic Weisbecker | 9cbf117 | 2009-04-19 04:51:29 +0200 | [diff] [blame] | 533 | strcpy(__get_str(dst), src); |
| 534 | |
Steven Rostedt | f42c85e | 2009-04-13 12:25:37 -0400 | [diff] [blame] | 535 | #undef TRACE_EVENT |
| 536 | #define TRACE_EVENT(call, proto, args, tstruct, assign, print) \ |
Steven Rostedt | f42c85e | 2009-04-13 12:25:37 -0400 | [diff] [blame] | 537 | \ |
| 538 | static struct ftrace_event_call event_##call; \ |
| 539 | \ |
| 540 | static void ftrace_raw_event_##call(proto) \ |
| 541 | { \ |
Li Zefan | 7fcb7c4 | 2009-06-01 15:35:46 +0800 | [diff] [blame] | 542 | struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\ |
Zhaolei | f2aebae | 2009-05-27 21:36:02 +0800 | [diff] [blame] | 543 | struct ftrace_event_call *event_call = &event_##call; \ |
Steven Rostedt | f42c85e | 2009-04-13 12:25:37 -0400 | [diff] [blame] | 544 | struct ring_buffer_event *event; \ |
| 545 | struct ftrace_raw_##call *entry; \ |
| 546 | unsigned long irq_flags; \ |
Li Zefan | 7fcb7c4 | 2009-06-01 15:35:46 +0800 | [diff] [blame] | 547 | int __data_size; \ |
Steven Rostedt | f42c85e | 2009-04-13 12:25:37 -0400 | [diff] [blame] | 548 | int pc; \ |
| 549 | \ |
| 550 | local_save_flags(irq_flags); \ |
| 551 | pc = preempt_count(); \ |
| 552 | \ |
Li Zefan | 7fcb7c4 | 2009-06-01 15:35:46 +0800 | [diff] [blame] | 553 | __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \ |
Frederic Weisbecker | 9cbf117 | 2009-04-19 04:51:29 +0200 | [diff] [blame] | 554 | \ |
Steven Rostedt | f42c85e | 2009-04-13 12:25:37 -0400 | [diff] [blame] | 555 | event = trace_current_buffer_lock_reserve(event_##call.id, \ |
Li Zefan | 7fcb7c4 | 2009-06-01 15:35:46 +0800 | [diff] [blame] | 556 | sizeof(*entry) + __data_size, \ |
Frederic Weisbecker | 9cbf117 | 2009-04-19 04:51:29 +0200 | [diff] [blame] | 557 | irq_flags, pc); \ |
Steven Rostedt | f42c85e | 2009-04-13 12:25:37 -0400 | [diff] [blame] | 558 | if (!event) \ |
| 559 | return; \ |
| 560 | entry = ring_buffer_event_data(event); \ |
| 561 | \ |
Li Zefan | 7fcb7c4 | 2009-06-01 15:35:46 +0800 | [diff] [blame] | 562 | \ |
| 563 | tstruct \ |
| 564 | \ |
Li Zefan | a9c1c3a | 2009-06-01 15:35:13 +0800 | [diff] [blame] | 565 | { assign; } \ |
Steven Rostedt | f42c85e | 2009-04-13 12:25:37 -0400 | [diff] [blame] | 566 | \ |
Zhaolei | f2aebae | 2009-05-27 21:36:02 +0800 | [diff] [blame] | 567 | if (!filter_current_check_discard(event_call, entry, event)) \ |
Steven Rostedt | f42c85e | 2009-04-13 12:25:37 -0400 | [diff] [blame] | 568 | trace_nowake_buffer_unlock_commit(event, irq_flags, pc); \ |
| 569 | } \ |
| 570 | \ |
Jason Baron | 69fd4f0 | 2009-08-10 16:52:44 -0400 | [diff] [blame^] | 571 | static int ftrace_raw_reg_event_##call(void *ptr) \ |
Steven Rostedt | f42c85e | 2009-04-13 12:25:37 -0400 | [diff] [blame] | 572 | { \ |
| 573 | int ret; \ |
| 574 | \ |
| 575 | ret = register_trace_##call(ftrace_raw_event_##call); \ |
| 576 | if (ret) \ |
| 577 | pr_info("event trace: Could not activate trace point " \ |
| 578 | "probe to " #call "\n"); \ |
| 579 | return ret; \ |
| 580 | } \ |
| 581 | \ |
Jason Baron | 69fd4f0 | 2009-08-10 16:52:44 -0400 | [diff] [blame^] | 582 | static void ftrace_raw_unreg_event_##call(void *ptr) \ |
Steven Rostedt | f42c85e | 2009-04-13 12:25:37 -0400 | [diff] [blame] | 583 | { \ |
| 584 | unregister_trace_##call(ftrace_raw_event_##call); \ |
| 585 | } \ |
| 586 | \ |
| 587 | static struct trace_event ftrace_event_type_##call = { \ |
| 588 | .trace = ftrace_raw_output_##call, \ |
| 589 | }; \ |
| 590 | \ |
| 591 | static int ftrace_raw_init_event_##call(void) \ |
| 592 | { \ |
| 593 | int id; \ |
| 594 | \ |
| 595 | id = register_ftrace_event(&ftrace_event_type_##call); \ |
| 596 | if (!id) \ |
| 597 | return -ENODEV; \ |
| 598 | event_##call.id = id; \ |
| 599 | INIT_LIST_HEAD(&event_##call.fields); \ |
| 600 | init_preds(&event_##call); \ |
| 601 | return 0; \ |
| 602 | } \ |
| 603 | \ |
| 604 | static struct ftrace_event_call __used \ |
| 605 | __attribute__((__aligned__(4))) \ |
| 606 | __attribute__((section("_ftrace_events"))) event_##call = { \ |
| 607 | .name = #call, \ |
| 608 | .system = __stringify(TRACE_SYSTEM), \ |
Steven Rostedt | 6d72373 | 2009-04-10 14:53:50 -0400 | [diff] [blame] | 609 | .event = &ftrace_event_type_##call, \ |
Steven Rostedt | f42c85e | 2009-04-13 12:25:37 -0400 | [diff] [blame] | 610 | .raw_init = ftrace_raw_init_event_##call, \ |
| 611 | .regfunc = ftrace_raw_reg_event_##call, \ |
| 612 | .unregfunc = ftrace_raw_unreg_event_##call, \ |
| 613 | .show_format = ftrace_format_##call, \ |
| 614 | .define_fields = ftrace_define_fields_##call, \ |
| 615 | _TRACE_PROFILE_INIT(call) \ |
| 616 | } |
| 617 | |
| 618 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| 619 | |
Frederic Weisbecker | f413cdb | 2009-08-07 01:25:54 +0200 | [diff] [blame] | 620 | /* |
| 621 | * Define the insertion callback to profile events |
| 622 | * |
| 623 | * The job is very similar to ftrace_raw_event_<call> except that we don't |
| 624 | * insert in the ring buffer but in a perf counter. |
| 625 | * |
| 626 | * static void ftrace_profile_<call>(proto) |
| 627 | * { |
| 628 | * struct ftrace_data_offsets_<call> __maybe_unused __data_offsets; |
| 629 | * struct ftrace_event_call *event_call = &event_<call>; |
| 630 | * extern void perf_tpcounter_event(int, u64, u64, void *, int); |
| 631 | * struct ftrace_raw_##call *entry; |
| 632 | * u64 __addr = 0, __count = 1; |
| 633 | * unsigned long irq_flags; |
| 634 | * int __entry_size; |
| 635 | * int __data_size; |
| 636 | * int pc; |
| 637 | * |
| 638 | * local_save_flags(irq_flags); |
| 639 | * pc = preempt_count(); |
| 640 | * |
| 641 | * __data_size = ftrace_get_offsets_<call>(&__data_offsets, args); |
Frederic Weisbecker | 304703a | 2009-08-10 16:11:32 +0200 | [diff] [blame] | 642 | * |
| 643 | * // Below we want to get the aligned size by taking into account |
| 644 | * // the u32 field that will later store the buffer size |
| 645 | * __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32), |
| 646 | * sizeof(u64)); |
| 647 | * __entry_size -= sizeof(u32); |
Frederic Weisbecker | f413cdb | 2009-08-07 01:25:54 +0200 | [diff] [blame] | 648 | * |
| 649 | * do { |
| 650 | * char raw_data[__entry_size]; <- allocate our sample in the stack |
| 651 | * struct trace_entry *ent; |
| 652 | * |
Frederic Weisbecker | 1853db0 | 2009-08-10 16:38:36 +0200 | [diff] [blame] | 653 | * zero dead bytes from alignment to avoid stack leak to userspace: |
| 654 | * |
| 655 | * *(u64 *)(&raw_data[__entry_size - sizeof(u64)]) = 0ULL; |
Frederic Weisbecker | f413cdb | 2009-08-07 01:25:54 +0200 | [diff] [blame] | 656 | * entry = (struct ftrace_raw_<call> *)raw_data; |
| 657 | * ent = &entry->ent; |
| 658 | * tracing_generic_entry_update(ent, irq_flags, pc); |
| 659 | * ent->type = event_call->id; |
| 660 | * |
| 661 | * <tstruct> <- do some jobs with dynamic arrays |
| 662 | * |
| 663 | * <assign> <- affect our values |
| 664 | * |
| 665 | * perf_tpcounter_event(event_call->id, __addr, __count, entry, |
| 666 | * __entry_size); <- submit them to perf counter |
| 667 | * } while (0); |
| 668 | * |
| 669 | * } |
| 670 | */ |
| 671 | |
| 672 | #ifdef CONFIG_EVENT_PROFILE |
| 673 | |
| 674 | #undef __perf_addr |
| 675 | #define __perf_addr(a) __addr = (a) |
| 676 | |
| 677 | #undef __perf_count |
| 678 | #define __perf_count(c) __count = (c) |
| 679 | |
| 680 | #undef TRACE_EVENT |
| 681 | #define TRACE_EVENT(call, proto, args, tstruct, assign, print) \ |
| 682 | static void ftrace_profile_##call(proto) \ |
| 683 | { \ |
| 684 | struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\ |
| 685 | struct ftrace_event_call *event_call = &event_##call; \ |
| 686 | extern void perf_tpcounter_event(int, u64, u64, void *, int); \ |
| 687 | struct ftrace_raw_##call *entry; \ |
| 688 | u64 __addr = 0, __count = 1; \ |
| 689 | unsigned long irq_flags; \ |
| 690 | int __entry_size; \ |
| 691 | int __data_size; \ |
| 692 | int pc; \ |
| 693 | \ |
| 694 | local_save_flags(irq_flags); \ |
| 695 | pc = preempt_count(); \ |
| 696 | \ |
| 697 | __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \ |
Peter Zijlstra | a044560 | 2009-08-10 11:16:52 +0200 | [diff] [blame] | 698 | __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),\ |
| 699 | sizeof(u64)); \ |
Frederic Weisbecker | 304703a | 2009-08-10 16:11:32 +0200 | [diff] [blame] | 700 | __entry_size -= sizeof(u32); \ |
Frederic Weisbecker | f413cdb | 2009-08-07 01:25:54 +0200 | [diff] [blame] | 701 | \ |
| 702 | do { \ |
| 703 | char raw_data[__entry_size]; \ |
| 704 | struct trace_entry *ent; \ |
| 705 | \ |
Frederic Weisbecker | 1853db0 | 2009-08-10 16:38:36 +0200 | [diff] [blame] | 706 | *(u64 *)(&raw_data[__entry_size - sizeof(u64)]) = 0ULL; \ |
Frederic Weisbecker | f413cdb | 2009-08-07 01:25:54 +0200 | [diff] [blame] | 707 | entry = (struct ftrace_raw_##call *)raw_data; \ |
| 708 | ent = &entry->ent; \ |
| 709 | tracing_generic_entry_update(ent, irq_flags, pc); \ |
| 710 | ent->type = event_call->id; \ |
| 711 | \ |
| 712 | tstruct \ |
| 713 | \ |
| 714 | { assign; } \ |
| 715 | \ |
| 716 | perf_tpcounter_event(event_call->id, __addr, __count, entry,\ |
| 717 | __entry_size); \ |
| 718 | } while (0); \ |
| 719 | \ |
| 720 | } |
| 721 | |
| 722 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
| 723 | #endif /* CONFIG_EVENT_PROFILE */ |
| 724 | |
Steven Rostedt | f42c85e | 2009-04-13 12:25:37 -0400 | [diff] [blame] | 725 | #undef _TRACE_PROFILE_INIT |
| 726 | |