blob: 170c93bbdbb75e1be7a4efb71c7873d6c84d9e35 [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 *
Steven Rostedt (Red Hat)a7237762015-05-13 15:27:47 -04006 * struct trace_event_raw_<call> {
Steven Rostedtf42c85e2009-04-13 12:25:37 -04007 * 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
Steven Rostedt (Red Hat)af658dc2015-04-29 14:36:05 -040019#include <linux/trace_events.h>
Steven Rostedtf42c85e2009-04-13 12:25:37 -040020
Steven Rostedt (Red Hat)acd388f2015-03-31 14:37:12 -040021#ifndef TRACE_SYSTEM_VAR
22#define TRACE_SYSTEM_VAR TRACE_SYSTEM
23#endif
24
25#define __app__(x, y) str__##x##y
26#define __app(x, y) __app__(x, y)
27
28#define TRACE_SYSTEM_STRING __app(TRACE_SYSTEM_VAR,__trace_system_name)
29
30#define TRACE_MAKE_SYSTEM_STR() \
31 static const char TRACE_SYSTEM_STRING[] = \
32 __stringify(TRACE_SYSTEM)
33
34TRACE_MAKE_SYSTEM_STR();
35
Steven Rostedt (Red Hat)0c564a52015-03-24 17:58:09 -040036#undef TRACE_DEFINE_ENUM
37#define TRACE_DEFINE_ENUM(a) \
38 static struct trace_enum_map __used __initdata \
39 __##TRACE_SYSTEM##_##a = \
40 { \
41 .system = TRACE_SYSTEM_STRING, \
42 .enum_string = #a, \
43 .enum_value = a \
44 }; \
45 static struct trace_enum_map __used \
46 __attribute__((section("_ftrace_enum_map"))) \
47 *TRACE_SYSTEM##_##a = &__##TRACE_SYSTEM##_##a
48
Steven Rostedtff038f52009-11-18 20:27:27 -050049/*
Ingo Molnar091ad362009-11-26 09:04:55 +010050 * DECLARE_EVENT_CLASS can be used to add a generic function
Steven Rostedtff038f52009-11-18 20:27:27 -050051 * handlers for events. That is, if all events have the same
52 * parameters and just have distinct trace points.
53 * Each tracepoint can be defined with DEFINE_EVENT and that
Ingo Molnar091ad362009-11-26 09:04:55 +010054 * will map the DECLARE_EVENT_CLASS to the tracepoint.
Steven Rostedtff038f52009-11-18 20:27:27 -050055 *
56 * TRACE_EVENT is a one to one mapping between tracepoint and template.
57 */
58#undef TRACE_EVENT
59#define TRACE_EVENT(name, proto, args, tstruct, assign, print) \
Ingo Molnar091ad362009-11-26 09:04:55 +010060 DECLARE_EVENT_CLASS(name, \
Steven Rostedtff038f52009-11-18 20:27:27 -050061 PARAMS(proto), \
62 PARAMS(args), \
63 PARAMS(tstruct), \
64 PARAMS(assign), \
65 PARAMS(print)); \
66 DEFINE_EVENT(name, name, PARAMS(proto), PARAMS(args));
67
68
Steven Rostedtf42c85e2009-04-13 12:25:37 -040069#undef __field
70#define __field(type, item) type item;
71
Li Zefan43b51ea2009-08-07 10:33:22 +080072#undef __field_ext
73#define __field_ext(type, item, filter_type) type item;
74
Steven Rostedt4d4c9cc2014-06-17 08:59:16 -040075#undef __field_struct
76#define __field_struct(type, item) type item;
77
78#undef __field_struct_ext
79#define __field_struct_ext(type, item, filter_type) type item;
80
Li Zefan7fcb7c42009-06-01 15:35:46 +080081#undef __array
82#define __array(type, item, len) type item[len];
83
84#undef __dynamic_array
Li Zefan7d536cb2009-07-16 10:54:02 +080085#define __dynamic_array(type, item, len) u32 __data_loc_##item;
Li Zefan7fcb7c42009-06-01 15:35:46 +080086
Frederic Weisbecker9cbf1172009-04-19 04:51:29 +020087#undef __string
Li Zefan7fcb7c42009-06-01 15:35:46 +080088#define __string(item, src) __dynamic_array(char, item, -1)
Frederic Weisbecker9cbf1172009-04-19 04:51:29 +020089
Steven Rostedt (Red Hat)4449bf92014-05-06 13:10:24 -040090#undef __bitmask
91#define __bitmask(item, nr_bits) __dynamic_array(char, item, -1)
92
Steven Rostedtf42c85e2009-04-13 12:25:37 -040093#undef TP_STRUCT__entry
94#define TP_STRUCT__entry(args...) args
95
Ingo Molnar091ad362009-11-26 09:04:55 +010096#undef DECLARE_EVENT_CLASS
97#define DECLARE_EVENT_CLASS(name, proto, args, tstruct, assign, print) \
Steven Rostedt (Red Hat)a7237762015-05-13 15:27:47 -040098 struct trace_event_raw_##name { \
Steven Rostedtff038f52009-11-18 20:27:27 -050099 struct trace_entry ent; \
100 tstruct \
101 char __data[0]; \
Steven Rostedt8f082012010-04-20 10:47:33 -0400102 }; \
103 \
Steven Rostedt (Red Hat)2425bcb2015-05-05 11:45:27 -0400104 static struct trace_event_class event_class_##name;
Steven Rostedt8f082012010-04-20 10:47:33 -0400105
Steven Rostedtff038f52009-11-18 20:27:27 -0500106#undef DEFINE_EVENT
107#define DEFINE_EVENT(template, name, proto, args) \
Steven Rostedt (Red Hat)2425bcb2015-05-05 11:45:27 -0400108 static struct trace_event_call __used \
Jeff Mahoney86c38a32010-02-24 13:59:23 -0500109 __attribute__((__aligned__(4))) event_##name
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400110
Steven Rostedtf5abaa12013-06-20 11:44:44 -0400111#undef DEFINE_EVENT_FN
112#define DEFINE_EVENT_FN(template, name, proto, args, reg, unreg) \
113 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
114
Steven Rostedte5bc9722009-11-18 20:36:26 -0500115#undef DEFINE_EVENT_PRINT
116#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
117 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
118
Josh Stone97419872009-08-24 14:43:13 -0700119/* Callbacks are meaningless to ftrace. */
120#undef TRACE_EVENT_FN
Frederic Weisbecker0dd7b742009-08-28 00:50:06 +0200121#define TRACE_EVENT_FN(name, proto, args, tstruct, \
122 assign, print, reg, unreg) \
Frederic Weisbecker819ce452010-07-20 18:41:24 +0200123 TRACE_EVENT(name, PARAMS(proto), PARAMS(args), \
124 PARAMS(tstruct), PARAMS(assign), PARAMS(print)) \
Josh Stone97419872009-08-24 14:43:13 -0700125
Denis Kirjanov27011212015-12-14 23:18:05 +0300126#undef TRACE_EVENT_FN_COND
127#define TRACE_EVENT_FN_COND(name, proto, args, cond, tstruct, \
128 assign, print, reg, unreg) \
129 TRACE_EVENT_CONDITION(name, PARAMS(proto), PARAMS(args), PARAMS(cond), \
130 PARAMS(tstruct), PARAMS(assign), PARAMS(print)) \
131
Frederic Weisbecker1ed0c592010-11-18 01:46:57 +0100132#undef TRACE_EVENT_FLAGS
133#define TRACE_EVENT_FLAGS(name, value) \
Frederic Weisbecker53cf810b2010-11-18 02:11:42 +0100134 __TRACE_EVENT_FLAGS(name, value)
Frederic Weisbecker1ed0c592010-11-18 01:46:57 +0100135
Peter Zijlstrad5b5f392013-11-14 16:23:04 +0100136#undef TRACE_EVENT_PERF_PERM
137#define TRACE_EVENT_PERF_PERM(name, expr...) \
138 __TRACE_EVENT_PERF_PERM(name, expr)
139
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400140#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
141
142/*
143 * Stage 2 of the trace events.
144 *
Frederic Weisbecker9cbf1172009-04-19 04:51:29 +0200145 * Include the following:
146 *
Steven Rostedt (Red Hat)62323a12015-05-13 15:33:52 -0400147 * struct trace_event_data_offsets_<call> {
Li Zefan7d536cb2009-07-16 10:54:02 +0800148 * u32 <item1>;
149 * u32 <item2>;
Frederic Weisbecker9cbf1172009-04-19 04:51:29 +0200150 * [...]
151 * };
152 *
Li Zefan7d536cb2009-07-16 10:54:02 +0800153 * The __dynamic_array() macro will create each u32 <item>, this is
Li Zefan7fcb7c42009-06-01 15:35:46 +0800154 * to keep the offset of each array from the beginning of the event.
Li Zefan7d536cb2009-07-16 10:54:02 +0800155 * The size of an array is also encoded, in the higher 16 bits of <item>.
Frederic Weisbecker9cbf1172009-04-19 04:51:29 +0200156 */
157
Steven Rostedt (Red Hat)0c564a52015-03-24 17:58:09 -0400158#undef TRACE_DEFINE_ENUM
159#define TRACE_DEFINE_ENUM(a)
160
Frederic Weisbecker9cbf1172009-04-19 04:51:29 +0200161#undef __field
Li Zefan43b51ea2009-08-07 10:33:22 +0800162#define __field(type, item)
163
164#undef __field_ext
165#define __field_ext(type, item, filter_type)
Frederic Weisbecker9cbf1172009-04-19 04:51:29 +0200166
Steven Rostedt4d4c9cc2014-06-17 08:59:16 -0400167#undef __field_struct
168#define __field_struct(type, item)
169
170#undef __field_struct_ext
171#define __field_struct_ext(type, item, filter_type)
172
Li Zefan7fcb7c42009-06-01 15:35:46 +0800173#undef __array
174#define __array(type, item, len)
175
176#undef __dynamic_array
Li Zefan7d536cb2009-07-16 10:54:02 +0800177#define __dynamic_array(type, item, len) u32 item;
Li Zefan7fcb7c42009-06-01 15:35:46 +0800178
Frederic Weisbecker9cbf1172009-04-19 04:51:29 +0200179#undef __string
Li Zefan7fcb7c42009-06-01 15:35:46 +0800180#define __string(item, src) __dynamic_array(char, item, -1)
Frederic Weisbecker9cbf1172009-04-19 04:51:29 +0200181
Steven Rostedt (Red Hat)4449bf92014-05-06 13:10:24 -0400182#undef __bitmask
183#define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1)
184
Ingo Molnar091ad362009-11-26 09:04:55 +0100185#undef DECLARE_EVENT_CLASS
186#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
Steven Rostedt (Red Hat)62323a12015-05-13 15:33:52 -0400187 struct trace_event_data_offsets_##call { \
Frederic Weisbecker9cbf1172009-04-19 04:51:29 +0200188 tstruct; \
189 };
190
Steven Rostedtff038f52009-11-18 20:27:27 -0500191#undef DEFINE_EVENT
192#define DEFINE_EVENT(template, name, proto, args)
193
Steven Rostedte5bc9722009-11-18 20:36:26 -0500194#undef DEFINE_EVENT_PRINT
195#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
196 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
197
Frederic Weisbecker1ed0c592010-11-18 01:46:57 +0100198#undef TRACE_EVENT_FLAGS
199#define TRACE_EVENT_FLAGS(event, flag)
200
Peter Zijlstrad5b5f392013-11-14 16:23:04 +0100201#undef TRACE_EVENT_PERF_PERM
202#define TRACE_EVENT_PERF_PERM(event, expr...)
203
Frederic Weisbecker9cbf1172009-04-19 04:51:29 +0200204#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
205
206/*
207 * Stage 3 of the trace events.
208 *
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400209 * Override the macros in <trace/trace_events.h> to include the following:
210 *
211 * enum print_line_t
Steven Rostedt (Red Hat)892c5052015-05-05 14:18:11 -0400212 * trace_raw_output_<call>(struct trace_iterator *iter, int flags)
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400213 * {
214 * struct trace_seq *s = &iter->seq;
Steven Rostedt (Red Hat)a7237762015-05-13 15:27:47 -0400215 * struct trace_event_raw_<call> *field; <-- defined in stage 1
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400216 * struct trace_entry *entry;
Lai Jiangshanbc289ae2010-06-03 18:26:24 +0800217 * struct trace_seq *p = &iter->tmp_seq;
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400218 * int ret;
219 *
220 * entry = iter->ent;
221 *
Steven Rostedt32c0eda2010-04-23 10:38:03 -0400222 * if (entry->type != event_<call>->event.type) {
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400223 * WARN_ON_ONCE(1);
224 * return TRACE_TYPE_UNHANDLED;
225 * }
226 *
227 * field = (typeof(field))entry;
228 *
Steven Whitehouse56d8bd32009-06-03 14:52:03 +0100229 * trace_seq_init(p);
Li Zefan50354a82010-03-24 10:58:24 +0800230 * ret = trace_seq_printf(s, "%s: ", <call>);
231 * if (ret)
232 * ret = trace_seq_printf(s, <TP_printk> "\n");
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400233 * if (!ret)
234 * return TRACE_TYPE_PARTIAL_LINE;
235 *
236 * return TRACE_TYPE_HANDLED;
237 * }
238 *
239 * This is the method used to print the raw event to the trace
240 * output format. Note, this is not needed if the data is read
241 * in binary.
242 */
243
244#undef __entry
245#define __entry field
246
247#undef TP_printk
248#define TP_printk(fmt, args...) fmt "\n", args
249
Li Zefan7fcb7c42009-06-01 15:35:46 +0800250#undef __get_dynamic_array
251#define __get_dynamic_array(field) \
Li Zefan7d536cb2009-07-16 10:54:02 +0800252 ((void *)__entry + (__entry->__data_loc_##field & 0xffff))
Li Zefan7fcb7c42009-06-01 15:35:46 +0800253
Steven Rostedt (Red Hat)beba4bb2014-06-04 14:29:33 -0400254#undef __get_dynamic_array_len
255#define __get_dynamic_array_len(field) \
256 ((__entry->__data_loc_##field >> 16) & 0xffff)
257
Frederic Weisbecker9cbf1172009-04-19 04:51:29 +0200258#undef __get_str
Li Zefan7fcb7c42009-06-01 15:35:46 +0800259#define __get_str(field) (char *)__get_dynamic_array(field)
Frederic Weisbecker9cbf1172009-04-19 04:51:29 +0200260
Steven Rostedt (Red Hat)4449bf92014-05-06 13:10:24 -0400261#undef __get_bitmask
262#define __get_bitmask(field) \
263 ({ \
264 void *__bitmask = __get_dynamic_array(field); \
265 unsigned int __bitmask_size; \
Steven Rostedt (Red Hat)beba4bb2014-06-04 14:29:33 -0400266 __bitmask_size = __get_dynamic_array_len(field); \
Steven Rostedt (Red Hat)645df982015-05-04 18:12:44 -0400267 trace_print_bitmask_seq(p, __bitmask, __bitmask_size); \
Steven Rostedt (Red Hat)4449bf92014-05-06 13:10:24 -0400268 })
269
Steven Rostedtbe74b732009-05-26 20:25:22 +0200270#undef __print_flags
271#define __print_flags(flag, delim, flag_array...) \
272 ({ \
Steven Rostedta48f4942009-09-14 11:18:02 -0400273 static const struct trace_print_flags __flags[] = \
Steven Rostedtbe74b732009-05-26 20:25:22 +0200274 { flag_array, { -1, NULL }}; \
Steven Rostedt (Red Hat)645df982015-05-04 18:12:44 -0400275 trace_print_flags_seq(p, delim, flag, __flags); \
Steven Rostedtbe74b732009-05-26 20:25:22 +0200276 })
277
Steven Rostedt0f4fc292009-05-20 19:21:47 -0400278#undef __print_symbolic
279#define __print_symbolic(value, symbol_array...) \
280 ({ \
281 static const struct trace_print_flags symbols[] = \
282 { symbol_array, { -1, NULL }}; \
Steven Rostedt (Red Hat)645df982015-05-04 18:12:44 -0400283 trace_print_symbols_seq(p, value, symbols); \
Steven Rostedt0f4fc292009-05-20 19:21:47 -0400284 })
285
liubo2fc1b6f2011-04-19 09:35:28 +0800286#undef __print_symbolic_u64
287#if BITS_PER_LONG == 32
288#define __print_symbolic_u64(value, symbol_array...) \
289 ({ \
290 static const struct trace_print_flags_u64 symbols[] = \
291 { symbol_array, { -1, NULL } }; \
Steven Rostedt (Red Hat)645df982015-05-04 18:12:44 -0400292 trace_print_symbols_seq_u64(p, value, symbols); \
liubo2fc1b6f2011-04-19 09:35:28 +0800293 })
294#else
295#define __print_symbolic_u64(value, symbol_array...) \
296 __print_symbolic(value, symbol_array)
297#endif
298
Kei Tokunaga5a2e3992010-04-01 20:40:58 +0900299#undef __print_hex
Steven Rostedt (Red Hat)645df982015-05-04 18:12:44 -0400300#define __print_hex(buf, buf_len) trace_print_hex_seq(p, buf, buf_len)
Kei Tokunaga5a2e3992010-04-01 20:40:58 +0900301
Dave Martin6ea22482015-01-28 12:48:53 +0000302#undef __print_array
303#define __print_array(array, count, el_size) \
304 ({ \
305 BUILD_BUG_ON(el_size != 1 && el_size != 2 && \
306 el_size != 4 && el_size != 8); \
Steven Rostedt (Red Hat)645df982015-05-04 18:12:44 -0400307 trace_print_array_seq(p, array, count, el_size); \
Dave Martin6ea22482015-01-28 12:48:53 +0000308 })
309
Ingo Molnar091ad362009-11-26 09:04:55 +0100310#undef DECLARE_EVENT_CLASS
311#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
Steven Rostedt83f0d532010-02-16 10:38:47 -0500312static notrace enum print_line_t \
Steven Rostedt (Red Hat)892c5052015-05-05 14:18:11 -0400313trace_raw_output_##call(struct trace_iterator *iter, int flags, \
314 struct trace_event *trace_event) \
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400315{ \
316 struct trace_seq *s = &iter->seq; \
Li Zefanf71130d2013-02-21 10:32:38 +0800317 struct trace_seq __maybe_unused *p = &iter->tmp_seq; \
Steven Rostedt (Red Hat)a7237762015-05-13 15:27:47 -0400318 struct trace_event_raw_##call *field; \
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400319 int ret; \
320 \
Li Zefanf71130d2013-02-21 10:32:38 +0800321 field = (typeof(field))iter->ent; \
Steven Rostedt80decc72010-04-23 10:00:22 -0400322 \
Steven Rostedt (Red Hat)892c5052015-05-05 14:18:11 -0400323 ret = trace_raw_output_prep(iter, trace_event); \
Steven Rostedt (Red Hat)8e2e0952014-11-14 11:42:06 -0500324 if (ret != TRACE_TYPE_HANDLED) \
Li Zefanf71130d2013-02-21 10:32:38 +0800325 return ret; \
326 \
Steven Rostedt (Red Hat)19a7fe22014-11-12 10:29:54 -0500327 trace_seq_printf(s, print); \
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400328 \
Steven Rostedt (Red Hat)19a7fe22014-11-12 10:29:54 -0500329 return trace_handle_return(s); \
Steven Rostedt80decc72010-04-23 10:00:22 -0400330} \
Steven Rostedt (Red Hat)3ad017b2015-05-13 15:35:44 -0400331static struct trace_event_functions trace_event_type_funcs_##call = { \
Steven Rostedt (Red Hat)892c5052015-05-05 14:18:11 -0400332 .trace = trace_raw_output_##call, \
Steven Rostedt80decc72010-04-23 10:00:22 -0400333};
Steven Rostedtff038f52009-11-18 20:27:27 -0500334
Steven Rostedte5bc9722009-11-18 20:36:26 -0500335#undef DEFINE_EVENT_PRINT
336#define DEFINE_EVENT_PRINT(template, call, proto, args, print) \
Steven Rostedt83f0d532010-02-16 10:38:47 -0500337static notrace enum print_line_t \
Steven Rostedt (Red Hat)892c5052015-05-05 14:18:11 -0400338trace_raw_output_##call(struct trace_iterator *iter, int flags, \
Steven Rostedta9a57762010-04-22 18:46:14 -0400339 struct trace_event *event) \
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400340{ \
Steven Rostedt (Red Hat)a7237762015-05-13 15:27:47 -0400341 struct trace_event_raw_##template *field; \
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400342 struct trace_entry *entry; \
Lai Jiangshanbc289ae2010-06-03 18:26:24 +0800343 struct trace_seq *p = &iter->tmp_seq; \
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400344 \
345 entry = iter->ent; \
346 \
Steven Rostedt32c0eda2010-04-23 10:38:03 -0400347 if (entry->type != event_##call.event.type) { \
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400348 WARN_ON_ONCE(1); \
349 return TRACE_TYPE_UNHANDLED; \
350 } \
351 \
352 field = (typeof(field))entry; \
353 \
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400354 trace_seq_init(p); \
Steven Rostedt (Red Hat)892c5052015-05-05 14:18:11 -0400355 return trace_output_call(iter, #call, print); \
Steven Rostedt80decc72010-04-23 10:00:22 -0400356} \
Steven Rostedt (Red Hat)3ad017b2015-05-13 15:35:44 -0400357static struct trace_event_functions trace_event_type_funcs_##call = { \
Steven Rostedt (Red Hat)892c5052015-05-05 14:18:11 -0400358 .trace = trace_raw_output_##call, \
Steven Rostedt80decc72010-04-23 10:00:22 -0400359};
Steven Rostedte5bc9722009-11-18 20:36:26 -0500360
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400361#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
362
Li Zefan43b51ea2009-08-07 10:33:22 +0800363#undef __field_ext
364#define __field_ext(type, item, filter_type) \
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400365 ret = trace_define_field(event_call, #type, #item, \
366 offsetof(typeof(field), item), \
Li Zefan43b51ea2009-08-07 10:33:22 +0800367 sizeof(field.item), \
368 is_signed_type(type), filter_type); \
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400369 if (ret) \
370 return ret;
371
Steven Rostedt4d4c9cc2014-06-17 08:59:16 -0400372#undef __field_struct_ext
373#define __field_struct_ext(type, item, filter_type) \
374 ret = trace_define_field(event_call, #type, #item, \
375 offsetof(typeof(field), item), \
376 sizeof(field.item), \
377 0, filter_type); \
378 if (ret) \
379 return ret;
380
Li Zefan43b51ea2009-08-07 10:33:22 +0800381#undef __field
382#define __field(type, item) __field_ext(type, item, FILTER_OTHER)
383
Steven Rostedt4d4c9cc2014-06-17 08:59:16 -0400384#undef __field_struct
385#define __field_struct(type, item) __field_struct_ext(type, item, FILTER_OTHER)
386
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400387#undef __array
388#define __array(type, item, len) \
Steven Rostedt04295782010-11-12 22:32:11 -0500389 do { \
Vaibhav Nagarnaik87291342014-02-13 19:51:48 -0800390 char *type_str = #type"["__stringify(len)"]"; \
Steven Rostedt04295782010-11-12 22:32:11 -0500391 BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \
Vaibhav Nagarnaik87291342014-02-13 19:51:48 -0800392 ret = trace_define_field(event_call, type_str, #item, \
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400393 offsetof(typeof(field), item), \
Lai Jiangshanfb7ae982009-12-15 15:39:38 +0800394 sizeof(field.item), \
395 is_signed_type(type), FILTER_OTHER); \
Steven Rostedt04295782010-11-12 22:32:11 -0500396 if (ret) \
397 return ret; \
398 } while (0);
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400399
Li Zefan7fcb7c42009-06-01 15:35:46 +0800400#undef __dynamic_array
401#define __dynamic_array(type, item, len) \
Lai Jiangshan68fd60a2009-07-16 10:53:34 +0800402 ret = trace_define_field(event_call, "__data_loc " #type "[]", #item, \
Li Zefan43b51ea2009-08-07 10:33:22 +0800403 offsetof(typeof(field), __data_loc_##item), \
Lai Jiangshanfb7ae982009-12-15 15:39:38 +0800404 sizeof(field.__data_loc_##item), \
405 is_signed_type(type), FILTER_OTHER);
Li Zefan7fcb7c42009-06-01 15:35:46 +0800406
Frederic Weisbecker9cbf1172009-04-19 04:51:29 +0200407#undef __string
Li Zefan7fcb7c42009-06-01 15:35:46 +0800408#define __string(item, src) __dynamic_array(char, item, -1)
Frederic Weisbecker9cbf1172009-04-19 04:51:29 +0200409
Steven Rostedt (Red Hat)4449bf92014-05-06 13:10:24 -0400410#undef __bitmask
411#define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1)
412
Ingo Molnar091ad362009-11-26 09:04:55 +0100413#undef DECLARE_EVENT_CLASS
414#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print) \
Li Zefan7e4f44b2013-02-21 10:33:33 +0800415static int notrace __init \
Steven Rostedt (Red Hat)33d0f352015-05-13 15:37:57 -0400416trace_event_define_fields_##call(struct trace_event_call *event_call) \
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400417{ \
Steven Rostedt (Red Hat)a7237762015-05-13 15:27:47 -0400418 struct trace_event_raw_##call field; \
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400419 int ret; \
420 \
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400421 tstruct; \
422 \
423 return ret; \
424}
425
Steven Rostedtff038f52009-11-18 20:27:27 -0500426#undef DEFINE_EVENT
427#define DEFINE_EVENT(template, name, proto, args)
428
Steven Rostedte5bc9722009-11-18 20:36:26 -0500429#undef DEFINE_EVENT_PRINT
430#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
431 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
432
Steven Rostedtf42c85e2009-04-13 12:25:37 -0400433#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
434
435/*
Li Zefan7fcb7c42009-06-01 15:35:46 +0800436 * remember the offset of each array from the beginning of the event.
437 */
438
439#undef __entry
440#define __entry entry
441
442#undef __field
443#define __field(type, item)
444
Li Zefan43b51ea2009-08-07 10:33:22 +0800445#undef __field_ext
446#define __field_ext(type, item, filter_type)
447
Steven Rostedt4d4c9cc2014-06-17 08:59:16 -0400448#undef __field_struct
449#define __field_struct(type, item)
450
451#undef __field_struct_ext
452#define __field_struct_ext(type, item, filter_type)
453
Li Zefan7fcb7c42009-06-01 15:35:46 +0800454#undef __array
455#define __array(type, item, len)
456
457#undef __dynamic_array
458#define __dynamic_array(type, item, len) \
Filipe Brandenburger114e7b52014-02-28 21:32:17 -0800459 __item_length = (len) * sizeof(type); \
Li Zefan7fcb7c42009-06-01 15:35:46 +0800460 __data_offsets->item = __data_size + \
461 offsetof(typeof(*entry), __data); \
Filipe Brandenburger114e7b52014-02-28 21:32:17 -0800462 __data_offsets->item |= __item_length << 16; \
463 __data_size += __item_length;
Li Zefan7fcb7c42009-06-01 15:35:46 +0800464
465#undef __string
Steven Rostedt (Red Hat)4e58e542013-11-26 09:22:54 -0500466#define __string(item, src) __dynamic_array(char, item, \
467 strlen((src) ? (const char *)(src) : "(null)") + 1)
Li Zefan7fcb7c42009-06-01 15:35:46 +0800468
Steven Rostedt (Red Hat)4449bf92014-05-06 13:10:24 -0400469/*
470 * __bitmask_size_in_bytes_raw is the number of bytes needed to hold
471 * num_possible_cpus().
472 */
473#define __bitmask_size_in_bytes_raw(nr_bits) \
474 (((nr_bits) + 7) / 8)
475
476#define __bitmask_size_in_longs(nr_bits) \
477 ((__bitmask_size_in_bytes_raw(nr_bits) + \
478 ((BITS_PER_LONG / 8) - 1)) / (BITS_PER_LONG / 8))
479
480/*
481 * __bitmask_size_in_bytes is the number of bytes needed to hold
482 * num_possible_cpus() padded out to the nearest long. This is what
483 * is saved in the buffer, just to be consistent.
484 */
485#define __bitmask_size_in_bytes(nr_bits) \
486 (__bitmask_size_in_longs(nr_bits) * (BITS_PER_LONG / 8))
487
488#undef __bitmask
489#define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, \
490 __bitmask_size_in_longs(nr_bits))
491
Ingo Molnar091ad362009-11-26 09:04:55 +0100492#undef DECLARE_EVENT_CLASS
493#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
Steven Rostedt (Red Hat)d0ee8f42015-05-13 15:40:23 -0400494static inline notrace int trace_event_get_offsets_##call( \
Steven Rostedt (Red Hat)62323a12015-05-13 15:33:52 -0400495 struct trace_event_data_offsets_##call *__data_offsets, proto) \
Li Zefan7fcb7c42009-06-01 15:35:46 +0800496{ \
497 int __data_size = 0; \
Filipe Brandenburger114e7b52014-02-28 21:32:17 -0800498 int __maybe_unused __item_length; \
Steven Rostedt (Red Hat)a7237762015-05-13 15:27:47 -0400499 struct trace_event_raw_##call __maybe_unused *entry; \
Li Zefan7fcb7c42009-06-01 15:35:46 +0800500 \
501 tstruct; \
502 \
503 return __data_size; \
504}
505
Steven Rostedtff038f52009-11-18 20:27:27 -0500506#undef DEFINE_EVENT
507#define DEFINE_EVENT(template, name, proto, args)
508
Steven Rostedte5bc9722009-11-18 20:36:26 -0500509#undef DEFINE_EVENT_PRINT
510#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
511 DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
512
Li Zefan7fcb7c42009-06-01 15:35:46 +0800513#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
514
Steven Rostedt (Red Hat)46ac5182015-09-23 09:26:27 -0400515/*
516 * Stage 4 of the trace events.
517 *
518 * Override the macros in <trace/trace_events.h> to include the following:
519 *
520 * For those macros defined with TRACE_EVENT:
521 *
522 * static struct trace_event_call event_<call>;
523 *
524 * static void trace_event_raw_event_<call>(void *__data, proto)
525 * {
526 * struct trace_event_file *trace_file = __data;
527 * struct trace_event_call *event_call = trace_file->event_call;
528 * struct trace_event_data_offsets_<call> __maybe_unused __data_offsets;
529 * unsigned long eflags = trace_file->flags;
530 * enum event_trigger_type __tt = ETT_NONE;
531 * struct ring_buffer_event *event;
532 * struct trace_event_raw_<call> *entry; <-- defined in stage 1
533 * struct ring_buffer *buffer;
534 * unsigned long irq_flags;
535 * int __data_size;
536 * int pc;
537 *
538 * if (!(eflags & EVENT_FILE_FL_TRIGGER_COND)) {
539 * if (eflags & EVENT_FILE_FL_TRIGGER_MODE)
540 * event_triggers_call(trace_file, NULL);
541 * if (eflags & EVENT_FILE_FL_SOFT_DISABLED)
542 * return;
543 * }
544 *
545 * local_save_flags(irq_flags);
546 * pc = preempt_count();
547 *
548 * __data_size = trace_event_get_offsets_<call>(&__data_offsets, args);
549 *
550 * event = trace_event_buffer_lock_reserve(&buffer, trace_file,
551 * event_<call>->event.type,
552 * sizeof(*entry) + __data_size,
553 * irq_flags, pc);
554 * if (!event)
555 * return;
556 * entry = ring_buffer_event_data(event);
557 *
558 * { <assign>; } <-- Here we assign the entries by the __field and
559 * __array macros.
560 *
561 * if (eflags & EVENT_FILE_FL_TRIGGER_COND)
562 * __tt = event_triggers_call(trace_file, entry);
563 *
564 * if (test_bit(EVENT_FILE_FL_SOFT_DISABLED_BIT,
565 * &trace_file->flags))
566 * ring_buffer_discard_commit(buffer, event);
567 * else if (!filter_check_discard(trace_file, entry, buffer, event))
568 * trace_buffer_unlock_commit(buffer, event, irq_flags, pc);
569 *
570 * if (__tt)
571 * event_triggers_post_call(trace_file, __tt);
572 * }
573 *
574 * static struct trace_event ftrace_event_type_<call> = {
575 * .trace = trace_raw_output_<call>, <-- stage 2
576 * };
577 *
578 * static char print_fmt_<call>[] = <TP_printk>;
579 *
580 * static struct trace_event_class __used event_class_<template> = {
581 * .system = "<system>",
582 * .define_fields = trace_event_define_fields_<call>,
583 * .fields = LIST_HEAD_INIT(event_class_##call.fields),
584 * .raw_init = trace_event_raw_init,
585 * .probe = trace_event_raw_event_##call,
586 * .reg = trace_event_reg,
587 * };
588 *
589 * static struct trace_event_call event_<call> = {
590 * .class = event_class_<template>,
591 * {
592 * .tp = &__tracepoint_<call>,
593 * },
594 * .event = &ftrace_event_type_<call>,
595 * .print_fmt = print_fmt_<call>,
596 * .flags = TRACE_EVENT_FL_TRACEPOINT,
597 * };
598 * // its only safe to use pointers when doing linker tricks to
599 * // create an array.
600 * static struct trace_event_call __used
601 * __attribute__((section("_ftrace_events"))) *__event_<call> = &event_<call>;
602 *
603 */
604
605#ifdef CONFIG_PERF_EVENTS
606
607#define _TRACE_PERF_PROTO(call, proto) \
608 static notrace void \
609 perf_trace_##call(void *__data, proto);
610
611#define _TRACE_PERF_INIT(call) \
612 .perf_probe = perf_trace_##call,
613
614#else
615#define _TRACE_PERF_PROTO(call, proto)
616#define _TRACE_PERF_INIT(call)
617#endif /* CONFIG_PERF_EVENTS */
618
619#undef __entry
620#define __entry entry
621
622#undef __field
623#define __field(type, item)
624
625#undef __field_struct
626#define __field_struct(type, item)
627
628#undef __array
629#define __array(type, item, len)
630
631#undef __dynamic_array
632#define __dynamic_array(type, item, len) \
633 __entry->__data_loc_##item = __data_offsets.item;
634
635#undef __string
636#define __string(item, src) __dynamic_array(char, item, -1)
637
638#undef __assign_str
639#define __assign_str(dst, src) \
640 strcpy(__get_str(dst), (src) ? (const char *)(src) : "(null)");
641
642#undef __bitmask
643#define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1)
644
645#undef __get_bitmask
646#define __get_bitmask(field) (char *)__get_dynamic_array(field)
647
648#undef __assign_bitmask
649#define __assign_bitmask(dst, src, nr_bits) \
650 memcpy(__get_bitmask(dst), (src), __bitmask_size_in_bytes(nr_bits))
651
652#undef TP_fast_assign
653#define TP_fast_assign(args...) args
654
655#undef __perf_addr
656#define __perf_addr(a) (a)
657
658#undef __perf_count
659#define __perf_count(c) (c)
660
661#undef __perf_task
662#define __perf_task(t) (t)
663
664#undef DECLARE_EVENT_CLASS
665#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
666 \
667static notrace void \
668trace_event_raw_event_##call(void *__data, proto) \
669{ \
670 struct trace_event_file *trace_file = __data; \
671 struct trace_event_data_offsets_##call __maybe_unused __data_offsets;\
672 struct trace_event_buffer fbuffer; \
673 struct trace_event_raw_##call *entry; \
674 int __data_size; \
675 \
676 if (trace_trigger_soft_disabled(trace_file)) \
677 return; \
678 \
679 __data_size = trace_event_get_offsets_##call(&__data_offsets, args); \
680 \
681 entry = trace_event_buffer_reserve(&fbuffer, trace_file, \
682 sizeof(*entry) + __data_size); \
683 \
684 if (!entry) \
685 return; \
686 \
687 tstruct \
688 \
689 { assign; } \
690 \
691 trace_event_buffer_commit(&fbuffer); \
692}
693/*
694 * The ftrace_test_probe is compiled out, it is only here as a build time check
695 * to make sure that if the tracepoint handling changes, the ftrace probe will
696 * fail to compile unless it too is updated.
697 */
698
699#undef DEFINE_EVENT
700#define DEFINE_EVENT(template, call, proto, args) \
701static inline void ftrace_test_probe_##call(void) \
702{ \
703 check_trace_callback_type_##call(trace_event_raw_event_##template); \
704}
705
706#undef DEFINE_EVENT_PRINT
707#define DEFINE_EVENT_PRINT(template, name, proto, args, print)
708
709#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
710
711#undef __entry
712#define __entry REC
713
714#undef __print_flags
715#undef __print_symbolic
716#undef __print_hex
717#undef __get_dynamic_array
718#undef __get_dynamic_array_len
719#undef __get_str
720#undef __get_bitmask
721#undef __print_array
722
723#undef TP_printk
724#define TP_printk(fmt, args...) "\"" fmt "\", " __stringify(args)
725
726#undef DECLARE_EVENT_CLASS
727#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
728_TRACE_PERF_PROTO(call, PARAMS(proto)); \
729static char print_fmt_##call[] = print; \
730static struct trace_event_class __used __refdata event_class_##call = { \
731 .system = TRACE_SYSTEM_STRING, \
732 .define_fields = trace_event_define_fields_##call, \
733 .fields = LIST_HEAD_INIT(event_class_##call.fields),\
734 .raw_init = trace_event_raw_init, \
735 .probe = trace_event_raw_event_##call, \
736 .reg = trace_event_reg, \
737 _TRACE_PERF_INIT(call) \
738};
739
740#undef DEFINE_EVENT
741#define DEFINE_EVENT(template, call, proto, args) \
742 \
743static struct trace_event_call __used event_##call = { \
744 .class = &event_class_##template, \
745 { \
746 .tp = &__tracepoint_##call, \
747 }, \
748 .event.funcs = &trace_event_type_funcs_##template, \
749 .print_fmt = print_fmt_##template, \
750 .flags = TRACE_EVENT_FL_TRACEPOINT, \
751}; \
752static struct trace_event_call __used \
753__attribute__((section("_ftrace_events"))) *__event_##call = &event_##call
754
755#undef DEFINE_EVENT_PRINT
756#define DEFINE_EVENT_PRINT(template, call, proto, args, print) \
757 \
758static char print_fmt_##call[] = print; \
759 \
760static struct trace_event_call __used event_##call = { \
761 .class = &event_class_##template, \
762 { \
763 .tp = &__tracepoint_##call, \
764 }, \
765 .event.funcs = &trace_event_type_funcs_##call, \
766 .print_fmt = print_fmt_##call, \
767 .flags = TRACE_EVENT_FL_TRACEPOINT, \
768}; \
769static struct trace_event_call __used \
770__attribute__((section("_ftrace_events"))) *__event_##call = &event_##call
771
772#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)