blob: e7eb33420b0671e97706af7f5722fff02b12d281 [file] [log] [blame]
Steven Rostedtf42c85e2009-04-13 12:25:37 -04001/*
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 Rostedtff038f52009-11-18 20:27:27 -050021/*
Ingo Molnar091ad362009-11-26 09:04:55 +010022 * DECLARE_EVENT_CLASS can be used to add a generic function
Steven Rostedtff038f52009-11-18 20:27:27 -050023 * handlers for events. That is, if all events have the same
24 * parameters and just have distinct trace points.
25 * Each tracepoint can be defined with DEFINE_EVENT and that
Ingo Molnar091ad362009-11-26 09:04:55 +010026 * will map the DECLARE_EVENT_CLASS to the tracepoint.
Steven Rostedtff038f52009-11-18 20:27:27 -050027 *
28 * TRACE_EVENT is a one to one mapping between tracepoint and template.
29 */
30#undef TRACE_EVENT
31#define TRACE_EVENT(name, proto, args, tstruct, assign, print) \
Ingo Molnar091ad362009-11-26 09:04:55 +010032 DECLARE_EVENT_CLASS(name, \
Steven Rostedtff038f52009-11-18 20:27:27 -050033 PARAMS(proto), \
34 PARAMS(args), \
35 PARAMS(tstruct), \
36 PARAMS(assign), \
37 PARAMS(print)); \
38 DEFINE_EVENT(name, name, PARAMS(proto), PARAMS(args));
39
40
Steven Rostedtf42c85e2009-04-13 12:25:37 -040041#undef __field
42#define __field(type, item) type item;
43
Li Zefan43b51ea2009-08-07 10:33:22 +080044#undef __field_ext
45#define __field_ext(type, item, filter_type) type item;
46
Li Zefan7fcb7c42009-06-01 15:35:46 +080047#undef __array
48#define __array(type, item, len) type item[len];
49
50#undef __dynamic_array
Li Zefan7d536cb2009-07-16 10:54:02 +080051#define __dynamic_array(type, item, len) u32 __data_loc_##item;
Li Zefan7fcb7c42009-06-01 15:35:46 +080052
Frederic Weisbecker9cbf1172009-04-19 04:51:29 +020053#undef __string
Li Zefan7fcb7c42009-06-01 15:35:46 +080054#define __string(item, src) __dynamic_array(char, item, -1)
Frederic Weisbecker9cbf1172009-04-19 04:51:29 +020055
Steven Rostedtf42c85e2009-04-13 12:25:37 -040056#undef TP_STRUCT__entry
57#define TP_STRUCT__entry(args...) args
58
Ingo Molnar091ad362009-11-26 09:04:55 +010059#undef DECLARE_EVENT_CLASS
60#define DECLARE_EVENT_CLASS(name, proto, args, tstruct, assign, print) \
Steven Rostedtff038f52009-11-18 20:27:27 -050061 struct ftrace_raw_##name { \
62 struct trace_entry ent; \
63 tstruct \
64 char __data[0]; \
Steven Rostedt8f082012010-04-20 10:47:33 -040065 }; \
66 \
67 static struct ftrace_event_class event_class_##name;
68
Steven Rostedtff038f52009-11-18 20:27:27 -050069#undef DEFINE_EVENT
70#define DEFINE_EVENT(template, name, proto, args) \
Jeff Mahoney86c38a32010-02-24 13:59:23 -050071 static struct ftrace_event_call \
72 __attribute__((__aligned__(4))) event_##name
Steven Rostedtf42c85e2009-04-13 12:25:37 -040073
Steven Rostedte5bc9722009-11-18 20:36:26 -050074#undef DEFINE_EVENT_PRINT
75#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
76 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
77
Frederic Weisbecker0dd7b742009-08-28 00:50:06 +020078#undef __cpparg
79#define __cpparg(arg...) arg
80
Josh Stone97419872009-08-24 14:43:13 -070081/* Callbacks are meaningless to ftrace. */
82#undef TRACE_EVENT_FN
Frederic Weisbecker0dd7b742009-08-28 00:50:06 +020083#define TRACE_EVENT_FN(name, proto, args, tstruct, \
84 assign, print, reg, unreg) \
85 TRACE_EVENT(name, __cpparg(proto), __cpparg(args), \
86 __cpparg(tstruct), __cpparg(assign), __cpparg(print)) \
Josh Stone97419872009-08-24 14:43:13 -070087
Steven Rostedtf42c85e2009-04-13 12:25:37 -040088#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
89
Frederic Weisbecker9cbf1172009-04-19 04:51:29 +020090
Steven Rostedtf42c85e2009-04-13 12:25:37 -040091/*
92 * Stage 2 of the trace events.
93 *
Frederic Weisbecker9cbf1172009-04-19 04:51:29 +020094 * Include the following:
95 *
Li Zefan7fcb7c42009-06-01 15:35:46 +080096 * struct ftrace_data_offsets_<call> {
Li Zefan7d536cb2009-07-16 10:54:02 +080097 * u32 <item1>;
98 * u32 <item2>;
Frederic Weisbecker9cbf1172009-04-19 04:51:29 +020099 * [...]
100 * };
101 *
Li Zefan7d536cb2009-07-16 10:54:02 +0800102 * The __dynamic_array() macro will create each u32 <item>, this is
Li Zefan7fcb7c42009-06-01 15:35:46 +0800103 * to keep the offset of each array from the beginning of the event.
Li Zefan7d536cb2009-07-16 10:54:02 +0800104 * The size of an array is also encoded, in the higher 16 bits of <item>.
Frederic Weisbecker9cbf1172009-04-19 04:51:29 +0200105 */
106
Frederic Weisbecker9cbf1172009-04-19 04:51:29 +0200107#undef __field
Li Zefan43b51ea2009-08-07 10:33:22 +0800108#define __field(type, item)
109
110#undef __field_ext
111#define __field_ext(type, item, filter_type)
Frederic Weisbecker9cbf1172009-04-19 04:51:29 +0200112
Li Zefan7fcb7c42009-06-01 15:35:46 +0800113#undef __array
114#define __array(type, item, len)
115
116#undef __dynamic_array
Li Zefan7d536cb2009-07-16 10:54:02 +0800117#define __dynamic_array(type, item, len) u32 item;
Li Zefan7fcb7c42009-06-01 15:35:46 +0800118
Frederic Weisbecker9cbf1172009-04-19 04:51:29 +0200119#undef __string
Li Zefan7fcb7c42009-06-01 15:35:46 +0800120#define __string(item, src) __dynamic_array(char, item, -1)
Frederic Weisbecker9cbf1172009-04-19 04:51:29 +0200121
Ingo Molnar091ad362009-11-26 09:04:55 +0100122#undef DECLARE_EVENT_CLASS
123#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
Li Zefan7fcb7c42009-06-01 15:35:46 +0800124 struct ftrace_data_offsets_##call { \
Frederic Weisbecker9cbf1172009-04-19 04:51:29 +0200125 tstruct; \
126 };
127
Steven Rostedtff038f52009-11-18 20:27:27 -0500128#undef DEFINE_EVENT
129#define DEFINE_EVENT(template, name, proto, args)
130
Steven Rostedte5bc9722009-11-18 20:36:26 -0500131#undef DEFINE_EVENT_PRINT
132#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
133 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
134
Frederic Weisbecker9cbf1172009-04-19 04:51:29 +0200135#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
136
137/*
138 * Stage 3 of the trace events.
139 *
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400140 * Override the macros in <trace/trace_events.h> to include the following:
141 *
142 * enum print_line_t
143 * ftrace_raw_output_<call>(struct trace_iterator *iter, int flags)
144 * {
145 * struct trace_seq *s = &iter->seq;
146 * struct ftrace_raw_<call> *field; <-- defined in stage 1
147 * struct trace_entry *entry;
Steven Rostedtbe74b732009-05-26 20:25:22 +0200148 * struct trace_seq *p;
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400149 * int ret;
150 *
151 * entry = iter->ent;
152 *
153 * if (entry->type != event_<call>.id) {
154 * WARN_ON_ONCE(1);
155 * return TRACE_TYPE_UNHANDLED;
156 * }
157 *
158 * field = (typeof(field))entry;
159 *
Li Zefan50354a82010-03-24 10:58:24 +0800160 * p = &get_cpu_var(ftrace_event_seq);
Steven Whitehouse56d8bd32009-06-03 14:52:03 +0100161 * trace_seq_init(p);
Li Zefan50354a82010-03-24 10:58:24 +0800162 * ret = trace_seq_printf(s, "%s: ", <call>);
163 * if (ret)
164 * ret = trace_seq_printf(s, <TP_printk> "\n");
Steven Rostedtbe74b732009-05-26 20:25:22 +0200165 * put_cpu();
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400166 * if (!ret)
167 * return TRACE_TYPE_PARTIAL_LINE;
168 *
169 * return TRACE_TYPE_HANDLED;
170 * }
171 *
172 * This is the method used to print the raw event to the trace
173 * output format. Note, this is not needed if the data is read
174 * in binary.
175 */
176
177#undef __entry
178#define __entry field
179
180#undef TP_printk
181#define TP_printk(fmt, args...) fmt "\n", args
182
Li Zefan7fcb7c42009-06-01 15:35:46 +0800183#undef __get_dynamic_array
184#define __get_dynamic_array(field) \
Li Zefan7d536cb2009-07-16 10:54:02 +0800185 ((void *)__entry + (__entry->__data_loc_##field & 0xffff))
Li Zefan7fcb7c42009-06-01 15:35:46 +0800186
Frederic Weisbecker9cbf1172009-04-19 04:51:29 +0200187#undef __get_str
Li Zefan7fcb7c42009-06-01 15:35:46 +0800188#define __get_str(field) (char *)__get_dynamic_array(field)
Frederic Weisbecker9cbf1172009-04-19 04:51:29 +0200189
Steven Rostedtbe74b732009-05-26 20:25:22 +0200190#undef __print_flags
191#define __print_flags(flag, delim, flag_array...) \
192 ({ \
Steven Rostedta48f4942009-09-14 11:18:02 -0400193 static const struct trace_print_flags __flags[] = \
Steven Rostedtbe74b732009-05-26 20:25:22 +0200194 { flag_array, { -1, NULL }}; \
Steven Rostedta48f4942009-09-14 11:18:02 -0400195 ftrace_print_flags_seq(p, delim, flag, __flags); \
Steven Rostedtbe74b732009-05-26 20:25:22 +0200196 })
197
Steven Rostedt0f4fc292009-05-20 19:21:47 -0400198#undef __print_symbolic
199#define __print_symbolic(value, symbol_array...) \
200 ({ \
201 static const struct trace_print_flags symbols[] = \
202 { symbol_array, { -1, NULL }}; \
203 ftrace_print_symbols_seq(p, value, symbols); \
204 })
205
Ingo Molnar091ad362009-11-26 09:04:55 +0100206#undef DECLARE_EVENT_CLASS
207#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
Steven Rostedt83f0d532010-02-16 10:38:47 -0500208static notrace enum print_line_t \
Steven Rostedtff038f52009-11-18 20:27:27 -0500209ftrace_raw_output_id_##call(int event_id, const char *name, \
210 struct trace_iterator *iter, int flags) \
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400211{ \
212 struct trace_seq *s = &iter->seq; \
213 struct ftrace_raw_##call *field; \
214 struct trace_entry *entry; \
Steven Rostedtbe74b732009-05-26 20:25:22 +0200215 struct trace_seq *p; \
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400216 int ret; \
217 \
218 entry = iter->ent; \
219 \
Steven Rostedtff038f52009-11-18 20:27:27 -0500220 if (entry->type != event_id) { \
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400221 WARN_ON_ONCE(1); \
222 return TRACE_TYPE_UNHANDLED; \
223 } \
224 \
225 field = (typeof(field))entry; \
226 \
Steven Rostedtbe74b732009-05-26 20:25:22 +0200227 p = &get_cpu_var(ftrace_event_seq); \
Steven Whitehouse56d8bd32009-06-03 14:52:03 +0100228 trace_seq_init(p); \
Steven Rostedtff038f52009-11-18 20:27:27 -0500229 ret = trace_seq_printf(s, "%s: ", name); \
230 if (ret) \
231 ret = trace_seq_printf(s, print); \
Steven Rostedtbe74b732009-05-26 20:25:22 +0200232 put_cpu(); \
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400233 if (!ret) \
234 return TRACE_TYPE_PARTIAL_LINE; \
235 \
236 return TRACE_TYPE_HANDLED; \
237}
Steven Rostedtff038f52009-11-18 20:27:27 -0500238
239#undef DEFINE_EVENT
240#define DEFINE_EVENT(template, name, proto, args) \
Steven Rostedt83f0d532010-02-16 10:38:47 -0500241static notrace enum print_line_t \
Steven Rostedtff038f52009-11-18 20:27:27 -0500242ftrace_raw_output_##name(struct trace_iterator *iter, int flags) \
243{ \
244 return ftrace_raw_output_id_##template(event_##name.id, \
245 #name, iter, flags); \
246}
247
Steven Rostedte5bc9722009-11-18 20:36:26 -0500248#undef DEFINE_EVENT_PRINT
249#define DEFINE_EVENT_PRINT(template, call, proto, args, print) \
Steven Rostedt83f0d532010-02-16 10:38:47 -0500250static notrace enum print_line_t \
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400251ftrace_raw_output_##call(struct trace_iterator *iter, int flags) \
252{ \
253 struct trace_seq *s = &iter->seq; \
Steven Rostedte5bc9722009-11-18 20:36:26 -0500254 struct ftrace_raw_##template *field; \
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400255 struct trace_entry *entry; \
256 struct trace_seq *p; \
257 int ret; \
258 \
259 entry = iter->ent; \
260 \
261 if (entry->type != event_##call.id) { \
262 WARN_ON_ONCE(1); \
263 return TRACE_TYPE_UNHANDLED; \
264 } \
265 \
266 field = (typeof(field))entry; \
267 \
268 p = &get_cpu_var(ftrace_event_seq); \
269 trace_seq_init(p); \
Steven Rostedte5bc9722009-11-18 20:36:26 -0500270 ret = trace_seq_printf(s, "%s: ", #call); \
271 if (ret) \
272 ret = trace_seq_printf(s, print); \
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400273 put_cpu(); \
274 if (!ret) \
275 return TRACE_TYPE_PARTIAL_LINE; \
276 \
277 return TRACE_TYPE_HANDLED; \
278}
Steven Rostedte5bc9722009-11-18 20:36:26 -0500279
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400280#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
281
Li Zefan43b51ea2009-08-07 10:33:22 +0800282#undef __field_ext
283#define __field_ext(type, item, filter_type) \
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400284 ret = trace_define_field(event_call, #type, #item, \
285 offsetof(typeof(field), item), \
Li Zefan43b51ea2009-08-07 10:33:22 +0800286 sizeof(field.item), \
287 is_signed_type(type), filter_type); \
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400288 if (ret) \
289 return ret;
290
Li Zefan43b51ea2009-08-07 10:33:22 +0800291#undef __field
292#define __field(type, item) __field_ext(type, item, FILTER_OTHER)
293
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400294#undef __array
295#define __array(type, item, len) \
296 BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \
297 ret = trace_define_field(event_call, #type "[" #len "]", #item, \
298 offsetof(typeof(field), item), \
Lai Jiangshanfb7ae982009-12-15 15:39:38 +0800299 sizeof(field.item), \
300 is_signed_type(type), FILTER_OTHER); \
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400301 if (ret) \
302 return ret;
303
Li Zefan7fcb7c42009-06-01 15:35:46 +0800304#undef __dynamic_array
305#define __dynamic_array(type, item, len) \
Lai Jiangshan68fd60a2009-07-16 10:53:34 +0800306 ret = trace_define_field(event_call, "__data_loc " #type "[]", #item, \
Li Zefan43b51ea2009-08-07 10:33:22 +0800307 offsetof(typeof(field), __data_loc_##item), \
Lai Jiangshanfb7ae982009-12-15 15:39:38 +0800308 sizeof(field.__data_loc_##item), \
309 is_signed_type(type), FILTER_OTHER);
Li Zefan7fcb7c42009-06-01 15:35:46 +0800310
Frederic Weisbecker9cbf1172009-04-19 04:51:29 +0200311#undef __string
Li Zefan7fcb7c42009-06-01 15:35:46 +0800312#define __string(item, src) __dynamic_array(char, item, -1)
Frederic Weisbecker9cbf1172009-04-19 04:51:29 +0200313
Ingo Molnar091ad362009-11-26 09:04:55 +0100314#undef DECLARE_EVENT_CLASS
315#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print) \
Steven Rostedt83f0d532010-02-16 10:38:47 -0500316static int notrace \
Li Zefan14be96c2009-08-19 15:53:52 +0800317ftrace_define_fields_##call(struct ftrace_event_call *event_call) \
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400318{ \
319 struct ftrace_raw_##call field; \
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400320 int ret; \
321 \
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400322 tstruct; \
323 \
324 return ret; \
325}
326
Steven Rostedtff038f52009-11-18 20:27:27 -0500327#undef DEFINE_EVENT
328#define DEFINE_EVENT(template, name, proto, args)
329
Steven Rostedte5bc9722009-11-18 20:36:26 -0500330#undef DEFINE_EVENT_PRINT
331#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
332 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
333
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400334#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
335
336/*
Li Zefan7fcb7c42009-06-01 15:35:46 +0800337 * remember the offset of each array from the beginning of the event.
338 */
339
340#undef __entry
341#define __entry entry
342
343#undef __field
344#define __field(type, item)
345
Li Zefan43b51ea2009-08-07 10:33:22 +0800346#undef __field_ext
347#define __field_ext(type, item, filter_type)
348
Li Zefan7fcb7c42009-06-01 15:35:46 +0800349#undef __array
350#define __array(type, item, len)
351
352#undef __dynamic_array
353#define __dynamic_array(type, item, len) \
354 __data_offsets->item = __data_size + \
355 offsetof(typeof(*entry), __data); \
Li Zefan7d536cb2009-07-16 10:54:02 +0800356 __data_offsets->item |= (len * sizeof(type)) << 16; \
Li Zefan7fcb7c42009-06-01 15:35:46 +0800357 __data_size += (len) * sizeof(type);
358
359#undef __string
Steven Rostedtff038f52009-11-18 20:27:27 -0500360#define __string(item, src) __dynamic_array(char, item, strlen(src) + 1)
Li Zefan7fcb7c42009-06-01 15:35:46 +0800361
Ingo Molnar091ad362009-11-26 09:04:55 +0100362#undef DECLARE_EVENT_CLASS
363#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
Steven Rostedt83f0d532010-02-16 10:38:47 -0500364static inline notrace int ftrace_get_offsets_##call( \
Li Zefan7fcb7c42009-06-01 15:35:46 +0800365 struct ftrace_data_offsets_##call *__data_offsets, proto) \
366{ \
367 int __data_size = 0; \
368 struct ftrace_raw_##call __maybe_unused *entry; \
369 \
370 tstruct; \
371 \
372 return __data_size; \
373}
374
Steven Rostedtff038f52009-11-18 20:27:27 -0500375#undef DEFINE_EVENT
376#define DEFINE_EVENT(template, name, proto, args)
377
Steven Rostedte5bc9722009-11-18 20:36:26 -0500378#undef DEFINE_EVENT_PRINT
379#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
380 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
381
Li Zefan7fcb7c42009-06-01 15:35:46 +0800382#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
383
384/*
Frederic Weisbecker9cbf1172009-04-19 04:51:29 +0200385 * Stage 4 of the trace events.
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400386 *
387 * Override the macros in <trace/trace_events.h> to include the following:
388 *
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400389 * For those macros defined with TRACE_EVENT:
390 *
391 * static struct ftrace_event_call event_<call>;
392 *
Steven Rostedt22392912010-04-21 12:27:06 -0400393 * static void ftrace_raw_event_<call>(void *__data, proto)
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400394 * {
Steven Rostedt22392912010-04-21 12:27:06 -0400395 * struct ftrace_event_call *event_call = __data;
Li Zefan50354a82010-03-24 10:58:24 +0800396 * struct ftrace_data_offsets_<call> __maybe_unused __data_offsets;
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400397 * struct ring_buffer_event *event;
398 * struct ftrace_raw_<call> *entry; <-- defined in stage 1
Steven Rostedte77405a2009-09-02 14:17:06 -0400399 * struct ring_buffer *buffer;
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400400 * unsigned long irq_flags;
Li Zefan50354a82010-03-24 10:58:24 +0800401 * int __data_size;
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400402 * int pc;
403 *
404 * local_save_flags(irq_flags);
405 * pc = preempt_count();
406 *
Li Zefan50354a82010-03-24 10:58:24 +0800407 * __data_size = ftrace_get_offsets_<call>(&__data_offsets, args);
408 *
Steven Rostedte77405a2009-09-02 14:17:06 -0400409 * event = trace_current_buffer_lock_reserve(&buffer,
410 * event_<call>.id,
Li Zefan50354a82010-03-24 10:58:24 +0800411 * sizeof(*entry) + __data_size,
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400412 * irq_flags, pc);
413 * if (!event)
414 * return;
415 * entry = ring_buffer_event_data(event);
416 *
Li Zefan50354a82010-03-24 10:58:24 +0800417 * { <assign>; } <-- Here we assign the entries by the __field and
418 * __array macros.
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400419 *
Li Zefan50354a82010-03-24 10:58:24 +0800420 * if (!filter_current_check_discard(buffer, event_call, entry, event))
421 * trace_current_buffer_unlock_commit(buffer,
422 * event, irq_flags, pc);
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400423 * }
424 *
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400425 * static struct trace_event ftrace_event_type_<call> = {
426 * .trace = ftrace_raw_output_<call>, <-- stage 2
427 * };
428 *
Li Zefan50354a82010-03-24 10:58:24 +0800429 * static const char print_fmt_<call>[] = <TP_printk>;
430 *
Steven Rostedt8f082012010-04-20 10:47:33 -0400431 * static struct ftrace_event_class __used event_class_<template> = {
432 * .system = "<system>",
Steven Rostedt2e33af02010-04-22 10:35:55 -0400433 * .define_fields = ftrace_define_fields_<call>,
Steven Rostedt0405ab82010-04-22 11:46:44 -0400434 * .fields = LIST_HEAD_INIT(event_class_##call.fields),
435 * .raw_init = trace_event_raw_init,
436 * .probe = ftrace_raw_event_##call,
Steven Rostedt8f082012010-04-20 10:47:33 -0400437 * };
438 *
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400439 * static struct ftrace_event_call __used
440 * __attribute__((__aligned__(4)))
441 * __attribute__((section("_ftrace_events"))) event_<call> = {
442 * .name = "<call>",
Steven Rostedt8f082012010-04-20 10:47:33 -0400443 * .class = event_class_<template>,
Steven Rostedt2e33af02010-04-22 10:35:55 -0400444 * .event = &ftrace_event_type_<call>,
Li Zefan50354a82010-03-24 10:58:24 +0800445 * .print_fmt = print_fmt_<call>,
Steven Rostedt8f082012010-04-20 10:47:33 -0400446 * };
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400447 *
448 */
449
Li Zefan07b139c2009-12-21 14:27:35 +0800450#ifdef CONFIG_PERF_EVENTS
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400451
Steven Rostedt22392912010-04-21 12:27:06 -0400452#define _TRACE_PERF_PROTO(call, proto) \
453 static notrace void \
454 perf_trace_##call(void *__data, proto);
455
Frederic Weisbecker97d5a222010-03-05 05:35:37 +0100456#define _TRACE_PERF_INIT(call) \
Steven Rostedt22392912010-04-21 12:27:06 -0400457 .perf_probe = perf_trace_##call,
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400458
459#else
Steven Rostedt22392912010-04-21 12:27:06 -0400460#define _TRACE_PERF_PROTO(call, proto)
Frederic Weisbecker97d5a222010-03-05 05:35:37 +0100461#define _TRACE_PERF_INIT(call)
Li Zefan07b139c2009-12-21 14:27:35 +0800462#endif /* CONFIG_PERF_EVENTS */
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400463
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400464#undef __entry
465#define __entry entry
466
Frederic Weisbecker9cbf1172009-04-19 04:51:29 +0200467#undef __field
468#define __field(type, item)
469
470#undef __array
471#define __array(type, item, len)
472
Li Zefan7fcb7c42009-06-01 15:35:46 +0800473#undef __dynamic_array
474#define __dynamic_array(type, item, len) \
475 __entry->__data_loc_##item = __data_offsets.item;
476
Frederic Weisbecker9cbf1172009-04-19 04:51:29 +0200477#undef __string
Li Zefan7fcb7c42009-06-01 15:35:46 +0800478#define __string(item, src) __dynamic_array(char, item, -1) \
Frederic Weisbecker9cbf1172009-04-19 04:51:29 +0200479
480#undef __assign_str
481#define __assign_str(dst, src) \
Frederic Weisbecker9cbf1172009-04-19 04:51:29 +0200482 strcpy(__get_str(dst), src);
483
Lai Jiangshan0fa0eda2009-12-15 15:39:57 +0800484#undef TP_fast_assign
485#define TP_fast_assign(args...) args
486
487#undef TP_perf_assign
488#define TP_perf_assign(args...)
489
Ingo Molnar091ad362009-11-26 09:04:55 +0100490#undef DECLARE_EVENT_CLASS
491#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400492 \
Steven Rostedt83f0d532010-02-16 10:38:47 -0500493static notrace void \
Steven Rostedt22392912010-04-21 12:27:06 -0400494ftrace_raw_event_##call(void *__data, proto) \
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400495{ \
Steven Rostedt22392912010-04-21 12:27:06 -0400496 struct ftrace_event_call *event_call = __data; \
Li Zefan7fcb7c42009-06-01 15:35:46 +0800497 struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400498 struct ring_buffer_event *event; \
499 struct ftrace_raw_##call *entry; \
Steven Rostedte77405a2009-09-02 14:17:06 -0400500 struct ring_buffer *buffer; \
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400501 unsigned long irq_flags; \
Li Zefan7fcb7c42009-06-01 15:35:46 +0800502 int __data_size; \
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400503 int pc; \
504 \
505 local_save_flags(irq_flags); \
506 pc = preempt_count(); \
507 \
Li Zefan7fcb7c42009-06-01 15:35:46 +0800508 __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
Frederic Weisbecker9cbf1172009-04-19 04:51:29 +0200509 \
Steven Rostedte77405a2009-09-02 14:17:06 -0400510 event = trace_current_buffer_lock_reserve(&buffer, \
Steven Rostedtff038f52009-11-18 20:27:27 -0500511 event_call->id, \
Li Zefan7fcb7c42009-06-01 15:35:46 +0800512 sizeof(*entry) + __data_size, \
Frederic Weisbecker9cbf1172009-04-19 04:51:29 +0200513 irq_flags, pc); \
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400514 if (!event) \
515 return; \
516 entry = ring_buffer_event_data(event); \
517 \
Li Zefan7fcb7c42009-06-01 15:35:46 +0800518 tstruct \
519 \
Li Zefana9c1c3a2009-06-01 15:35:13 +0800520 { assign; } \
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400521 \
Steven Rostedte77405a2009-09-02 14:17:06 -0400522 if (!filter_current_check_discard(buffer, event_call, entry, event)) \
523 trace_nowake_buffer_unlock_commit(buffer, \
524 event, irq_flags, pc); \
Steven Rostedtff038f52009-11-18 20:27:27 -0500525}
Steven Rostedt22392912010-04-21 12:27:06 -0400526/*
527 * The ftrace_test_probe is compiled out, it is only here as a build time check
528 * to make sure that if the tracepoint handling changes, the ftrace probe will
529 * fail to compile unless it too is updated.
530 */
Steven Rostedtff038f52009-11-18 20:27:27 -0500531
532#undef DEFINE_EVENT
533#define DEFINE_EVENT(template, call, proto, args) \
534 \
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400535static struct trace_event ftrace_event_type_##call = { \
536 .trace = ftrace_raw_output_##call, \
Steven Rostedt22392912010-04-21 12:27:06 -0400537}; \
538 \
539static inline void ftrace_test_probe_##call(void) \
540{ \
541 check_trace_callback_type_##call(ftrace_raw_event_##template); \
542}
Steven Rostedte5bc9722009-11-18 20:36:26 -0500543
544#undef DEFINE_EVENT_PRINT
545#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
546 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
547
548#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
549
Lai Jiangshan509e7602009-12-15 15:39:42 +0800550#undef __entry
551#define __entry REC
552
553#undef __print_flags
554#undef __print_symbolic
555#undef __get_dynamic_array
556#undef __get_str
557
558#undef TP_printk
559#define TP_printk(fmt, args...) "\"" fmt "\", " __stringify(args)
560
Ingo Molnar091ad362009-11-26 09:04:55 +0100561#undef DECLARE_EVENT_CLASS
Lai Jiangshan509e7602009-12-15 15:39:42 +0800562#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
Steven Rostedt22392912010-04-21 12:27:06 -0400563_TRACE_PERF_PROTO(call, PARAMS(proto)); \
Steven Rostedt8f082012010-04-20 10:47:33 -0400564static const char print_fmt_##call[] = print; \
565static struct ftrace_event_class __used event_class_##call = { \
Steven Rostedt22392912010-04-21 12:27:06 -0400566 .system = __stringify(TRACE_SYSTEM), \
Steven Rostedt2e33af02010-04-22 10:35:55 -0400567 .define_fields = ftrace_define_fields_##call, \
568 .fields = LIST_HEAD_INIT(event_class_##call.fields),\
Steven Rostedt0405ab82010-04-22 11:46:44 -0400569 .raw_init = trace_event_raw_init, \
Steven Rostedt22392912010-04-21 12:27:06 -0400570 .probe = ftrace_raw_event_##call, \
571 _TRACE_PERF_INIT(call) \
Steven Rostedt8f082012010-04-20 10:47:33 -0400572};
Steven Rostedte5bc9722009-11-18 20:36:26 -0500573
574#undef DEFINE_EVENT
575#define DEFINE_EVENT(template, call, proto, args) \
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400576 \
577static struct ftrace_event_call __used \
578__attribute__((__aligned__(4))) \
579__attribute__((section("_ftrace_events"))) event_##call = { \
580 .name = #call, \
Steven Rostedt8f082012010-04-20 10:47:33 -0400581 .class = &event_class_##template, \
Steven Rostedt6d723732009-04-10 14:53:50 -0400582 .event = &ftrace_event_type_##call, \
Lai Jiangshan509e7602009-12-15 15:39:42 +0800583 .print_fmt = print_fmt_##template, \
Steven Rostedt8f082012010-04-20 10:47:33 -0400584};
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400585
Steven Rostedte5bc9722009-11-18 20:36:26 -0500586#undef DEFINE_EVENT_PRINT
587#define DEFINE_EVENT_PRINT(template, call, proto, args, print) \
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400588 \
Lai Jiangshan509e7602009-12-15 15:39:42 +0800589static const char print_fmt_##call[] = print; \
590 \
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400591static struct ftrace_event_call __used \
592__attribute__((__aligned__(4))) \
593__attribute__((section("_ftrace_events"))) event_##call = { \
594 .name = #call, \
Steven Rostedt8f082012010-04-20 10:47:33 -0400595 .class = &event_class_##template, \
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400596 .event = &ftrace_event_type_##call, \
Lai Jiangshan509e7602009-12-15 15:39:42 +0800597 .print_fmt = print_fmt_##call, \
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400598}
599
600#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
601
Frederic Weisbeckerf413cdb2009-08-07 01:25:54 +0200602/*
Frederic Weisbecker97d5a222010-03-05 05:35:37 +0100603 * Define the insertion callback to perf events
Frederic Weisbeckerf413cdb2009-08-07 01:25:54 +0200604 *
605 * The job is very similar to ftrace_raw_event_<call> except that we don't
606 * insert in the ring buffer but in a perf counter.
607 *
Frederic Weisbecker97d5a222010-03-05 05:35:37 +0100608 * static void ftrace_perf_<call>(proto)
Frederic Weisbeckerf413cdb2009-08-07 01:25:54 +0200609 * {
610 * struct ftrace_data_offsets_<call> __maybe_unused __data_offsets;
611 * struct ftrace_event_call *event_call = &event_<call>;
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200612 * extern void perf_tp_event(int, u64, u64, void *, int);
Frederic Weisbeckerf413cdb2009-08-07 01:25:54 +0200613 * struct ftrace_raw_##call *entry;
Frederic Weisbecker444a2a32009-11-06 04:13:05 +0100614 * struct perf_trace_buf *trace_buf;
Frederic Weisbeckerf413cdb2009-08-07 01:25:54 +0200615 * u64 __addr = 0, __count = 1;
616 * unsigned long irq_flags;
Frederic Weisbecker20ab44252009-09-18 06:10:28 +0200617 * struct trace_entry *ent;
Frederic Weisbeckerf413cdb2009-08-07 01:25:54 +0200618 * int __entry_size;
619 * int __data_size;
Frederic Weisbecker20ab44252009-09-18 06:10:28 +0200620 * int __cpu
Frederic Weisbeckerf413cdb2009-08-07 01:25:54 +0200621 * int pc;
622 *
Frederic Weisbeckerf413cdb2009-08-07 01:25:54 +0200623 * pc = preempt_count();
624 *
625 * __data_size = ftrace_get_offsets_<call>(&__data_offsets, args);
Frederic Weisbecker304703a2009-08-10 16:11:32 +0200626 *
627 * // Below we want to get the aligned size by taking into account
628 * // the u32 field that will later store the buffer size
629 * __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),
630 * sizeof(u64));
631 * __entry_size -= sizeof(u32);
Frederic Weisbeckerf413cdb2009-08-07 01:25:54 +0200632 *
Frederic Weisbecker20ab44252009-09-18 06:10:28 +0200633 * // Protect the non nmi buffer
634 * // This also protects the rcu read side
635 * local_irq_save(irq_flags);
636 * __cpu = smp_processor_id();
Frederic Weisbeckerf413cdb2009-08-07 01:25:54 +0200637 *
Frederic Weisbecker20ab44252009-09-18 06:10:28 +0200638 * if (in_nmi())
Paul E. McKenney8d53dd52010-03-03 17:50:18 -0800639 * trace_buf = rcu_dereference_sched(perf_trace_buf_nmi);
Frederic Weisbecker20ab44252009-09-18 06:10:28 +0200640 * else
Paul E. McKenney8d53dd52010-03-03 17:50:18 -0800641 * trace_buf = rcu_dereference_sched(perf_trace_buf);
Frederic Weisbecker1853db02009-08-10 16:38:36 +0200642 *
Frederic Weisbecker444a2a32009-11-06 04:13:05 +0100643 * if (!trace_buf)
Frederic Weisbecker20ab44252009-09-18 06:10:28 +0200644 * goto end;
Frederic Weisbeckerf413cdb2009-08-07 01:25:54 +0200645 *
Frederic Weisbecker444a2a32009-11-06 04:13:05 +0100646 * trace_buf = per_cpu_ptr(trace_buf, __cpu);
647 *
648 * // Avoid recursion from perf that could mess up the buffer
649 * if (trace_buf->recursion++)
650 * goto end_recursion;
651 *
652 * raw_data = trace_buf->buf;
653 *
654 * // Make recursion update visible before entering perf_tp_event
655 * // so that we protect from perf recursions.
656 *
657 * barrier();
Frederic Weisbeckerf413cdb2009-08-07 01:25:54 +0200658 *
Frederic Weisbecker20ab44252009-09-18 06:10:28 +0200659 * //zero dead bytes from alignment to avoid stack leak to userspace:
660 * *(u64 *)(&raw_data[__entry_size - sizeof(u64)]) = 0ULL;
661 * entry = (struct ftrace_raw_<call> *)raw_data;
662 * ent = &entry->ent;
663 * tracing_generic_entry_update(ent, irq_flags, pc);
664 * ent->type = event_call->id;
Frederic Weisbeckerf413cdb2009-08-07 01:25:54 +0200665 *
Frederic Weisbecker20ab44252009-09-18 06:10:28 +0200666 * <tstruct> <- do some jobs with dynamic arrays
667 *
668 * <assign> <- affect our values
669 *
Linus Torvalds43c12662009-09-21 09:15:07 -0700670 * perf_tp_event(event_call->id, __addr, __count, entry,
Frederic Weisbecker20ab44252009-09-18 06:10:28 +0200671 * __entry_size); <- submit them to perf counter
Frederic Weisbeckerf413cdb2009-08-07 01:25:54 +0200672 *
673 * }
674 */
675
Li Zefan07b139c2009-12-21 14:27:35 +0800676#ifdef CONFIG_PERF_EVENTS
Frederic Weisbeckerf413cdb2009-08-07 01:25:54 +0200677
Lai Jiangshan509e7602009-12-15 15:39:42 +0800678#undef __entry
679#define __entry entry
680
681#undef __get_dynamic_array
682#define __get_dynamic_array(field) \
683 ((void *)__entry + (__entry->__data_loc_##field & 0xffff))
684
685#undef __get_str
686#define __get_str(field) (char *)__get_dynamic_array(field)
687
Frederic Weisbeckerf413cdb2009-08-07 01:25:54 +0200688#undef __perf_addr
689#define __perf_addr(a) __addr = (a)
690
691#undef __perf_count
692#define __perf_count(c) __count = (c)
693
Ingo Molnar091ad362009-11-26 09:04:55 +0100694#undef DECLARE_EVENT_CLASS
695#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
Steven Rostedt83f0d532010-02-16 10:38:47 -0500696static notrace void \
Steven Rostedt22392912010-04-21 12:27:06 -0400697perf_trace_##call(void *__data, proto) \
Frederic Weisbeckerf413cdb2009-08-07 01:25:54 +0200698{ \
Steven Rostedt22392912010-04-21 12:27:06 -0400699 struct ftrace_event_call *event_call = __data; \
Frederic Weisbeckerf413cdb2009-08-07 01:25:54 +0200700 struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
Frederic Weisbeckerf413cdb2009-08-07 01:25:54 +0200701 struct ftrace_raw_##call *entry; \
702 u64 __addr = 0, __count = 1; \
703 unsigned long irq_flags; \
Frederic Weisbeckerc5306652010-03-03 07:16:16 +0100704 struct pt_regs *__regs; \
Frederic Weisbeckerf413cdb2009-08-07 01:25:54 +0200705 int __entry_size; \
706 int __data_size; \
Peter Zijlstra4ed7c922009-11-23 11:37:29 +0100707 int rctx; \
Frederic Weisbeckerf413cdb2009-08-07 01:25:54 +0200708 \
709 __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
Peter Zijlstraa0445602009-08-10 11:16:52 +0200710 __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),\
711 sizeof(u64)); \
Frederic Weisbecker304703a2009-08-10 16:11:32 +0200712 __entry_size -= sizeof(u32); \
Frederic Weisbeckerf413cdb2009-08-07 01:25:54 +0200713 \
Frederic Weisbecker97d5a222010-03-05 05:35:37 +0100714 if (WARN_ONCE(__entry_size > PERF_MAX_TRACE_SIZE, \
Frederic Weisbecker20ab44252009-09-18 06:10:28 +0200715 "profile buffer not large enough")) \
716 return; \
Frederic Weisbecker97d5a222010-03-05 05:35:37 +0100717 entry = (struct ftrace_raw_##call *)perf_trace_buf_prepare( \
Xiao Guangrong430ad5a2010-01-28 09:32:29 +0800718 __entry_size, event_call->id, &rctx, &irq_flags); \
719 if (!entry) \
720 return; \
Frederic Weisbecker20ab44252009-09-18 06:10:28 +0200721 tstruct \
722 \
723 { assign; } \
724 \
Frederic Weisbeckerc5306652010-03-03 07:16:16 +0100725 __regs = &__get_cpu_var(perf_trace_regs); \
726 perf_fetch_caller_regs(__regs, 2); \
727 \
Frederic Weisbecker97d5a222010-03-05 05:35:37 +0100728 perf_trace_buf_submit(entry, __entry_size, rctx, __addr, \
Frederic Weisbeckerc5306652010-03-03 07:16:16 +0100729 __count, irq_flags, __regs); \
Frederic Weisbeckerf413cdb2009-08-07 01:25:54 +0200730}
731
Steven Rostedt22392912010-04-21 12:27:06 -0400732/*
733 * This part is compiled out, it is only here as a build time check
734 * to make sure that if the tracepoint handling changes, the
735 * perf probe will fail to compile unless it too is updated.
736 */
Steven Rostedtff038f52009-11-18 20:27:27 -0500737#undef DEFINE_EVENT
Steven Rostedt22392912010-04-21 12:27:06 -0400738#define DEFINE_EVENT(template, call, proto, args) \
739static inline void perf_test_probe_##call(void) \
740{ \
741 check_trace_callback_type_##call(perf_trace_##template); \
742 \
Steven Rostedtff038f52009-11-18 20:27:27 -0500743}
744
Steven Rostedt22392912010-04-21 12:27:06 -0400745
Steven Rostedte5bc9722009-11-18 20:36:26 -0500746#undef DEFINE_EVENT_PRINT
747#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
748 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
749
Frederic Weisbeckerf413cdb2009-08-07 01:25:54 +0200750#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
Li Zefan07b139c2009-12-21 14:27:35 +0800751#endif /* CONFIG_PERF_EVENTS */
Frederic Weisbeckerf413cdb2009-08-07 01:25:54 +0200752
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400753#undef _TRACE_PROFILE_INIT
754