Commit | Line | Data |
---|---|---|
9cfe06f8 SR |
1 | /* |
2 | * If TRACE_SYSTEM is defined, that will be the directory created | |
4e20e3a6 | 3 | * in the ftrace directory under /sys/kernel/tracing/events/<system> |
9cfe06f8 | 4 | * |
44ad18e0 | 5 | * The define_trace.h below will also look for a file name of |
9cfe06f8 | 6 | * TRACE_SYSTEM.h where TRACE_SYSTEM is what is defined here. |
67aedeb8 | 7 | * In this case, it would look for sample-trace.h |
9cfe06f8 | 8 | * |
44ad18e0 SR |
9 | * If the header name will be different than the system name |
10 | * (as in this case), then you can override the header name that | |
11 | * define_trace.h will look up by defining TRACE_INCLUDE_FILE | |
9cfe06f8 | 12 | * |
44ad18e0 | 13 | * This file is called trace-events-sample.h but we want the system |
67aedeb8 | 14 | * to be called "sample-trace". Therefore we must define the name of this |
44ad18e0 | 15 | * file: |
9cfe06f8 | 16 | * |
44ad18e0 | 17 | * #define TRACE_INCLUDE_FILE trace-events-sample |
9cfe06f8 | 18 | * |
44ad18e0 | 19 | * As we do an the bottom of this file. |
d0b6e04a LZ |
20 | * |
21 | * Notice that TRACE_SYSTEM should be defined outside of #if | |
22 | * protection, just like TRACE_INCLUDE_FILE. | |
9cfe06f8 SR |
23 | */ |
24 | #undef TRACE_SYSTEM | |
88920427 SRRH |
25 | #define TRACE_SYSTEM sample-trace |
26 | ||
27 | /* | |
28 | * TRACE_SYSTEM is expected to be a C valid variable (alpha-numeric | |
29 | * and underscore), although it may start with numbers. If for some | |
30 | * reason it is not, you need to add the following lines: | |
31 | */ | |
32 | #undef TRACE_SYSTEM_VAR | |
33 | #define TRACE_SYSTEM_VAR sample_trace | |
34 | /* | |
35 | * But the above is only needed if TRACE_SYSTEM is not alpha-numeric | |
36 | * and underscored. By default, TRACE_SYSTEM_VAR will be equal to | |
37 | * TRACE_SYSTEM. As TRACE_SYSTEM_VAR must be alpha-numeric, if | |
38 | * TRACE_SYSTEM is not, then TRACE_SYSTEM_VAR must be defined with | |
39 | * only alpha-numeric and underscores. | |
40 | * | |
41 | * The TRACE_SYSTEM_VAR is only used internally and not visible to | |
42 | * user space. | |
43 | */ | |
9cfe06f8 | 44 | |
d0b6e04a LZ |
45 | /* |
46 | * Notice that this file is not protected like a normal header. | |
47 | * We also must allow for rereading of this file. The | |
48 | * | |
49 | * || defined(TRACE_HEADER_MULTI_READ) | |
50 | * | |
51 | * serves this purpose. | |
52 | */ | |
53 | #if !defined(_TRACE_EVENT_SAMPLE_H) || defined(TRACE_HEADER_MULTI_READ) | |
54 | #define _TRACE_EVENT_SAMPLE_H | |
55 | ||
56 | /* | |
57 | * All trace headers should include tracepoint.h, until we finally | |
58 | * make it into a standard header. | |
59 | */ | |
60 | #include <linux/tracepoint.h> | |
61 | ||
9cfe06f8 SR |
62 | /* |
63 | * The TRACE_EVENT macro is broken up into 5 parts. | |
64 | * | |
65 | * name: name of the trace point. This is also how to enable the tracepoint. | |
66 | * A function called trace_foo_bar() will be created. | |
67 | * | |
68 | * proto: the prototype of the function trace_foo_bar() | |
69 | * Here it is trace_foo_bar(char *foo, int bar). | |
70 | * | |
71 | * args: must match the arguments in the prototype. | |
72 | * Here it is simply "foo, bar". | |
73 | * | |
74 | * struct: This defines the way the data will be stored in the ring buffer. | |
4e20e3a6 SRRH |
75 | * The items declared here become part of a special structure |
76 | * called "__entry", which can be used in the fast_assign part of the | |
77 | * TRACE_EVENT macro. | |
78 | * | |
79 | * Here are the currently defined types you can use: | |
80 | * | |
81 | * __field : Is broken up into type and name. Where type can be any | |
82 | * primitive type (integer, long or pointer). | |
83 | * | |
84 | * __field(int, foo) | |
85 | * | |
86 | * __entry->foo = 5; | |
87 | * | |
88 | * __field_struct : This can be any static complex data type (struct, union | |
89 | * but not an array). Be careful using complex types, as each | |
90 | * event is limited in size, and copying large amounts of data | |
91 | * into the ring buffer can slow things down. | |
92 | * | |
93 | * __field_struct(struct bar, foo) | |
94 | * | |
95 | * __entry->bar.x = y; | |
96 | ||
97 | * __array: There are three fields (type, name, size). The type is the | |
98 | * type of elements in teh array, the name is the name of the array. | |
99 | * size is the number of items in the array (not the total size). | |
100 | * | |
101 | * __array( char, foo, 10) is the same as saying: char foo[10]; | |
102 | * | |
103 | * Assigning arrays can be done like any array: | |
104 | * | |
105 | * __entry->foo[0] = 'a'; | |
106 | * | |
107 | * memcpy(__entry->foo, bar, 10); | |
108 | * | |
67aedeb8 | 109 | * __dynamic_array: This is similar to array, but can vary its size from |
4e20e3a6 SRRH |
110 | * instance to instance of the tracepoint being called. |
111 | * Like __array, this too has three elements (type, name, size); | |
112 | * type is the type of the element, name is the name of the array. | |
113 | * The size is different than __array. It is not a static number, | |
114 | * but the algorithm to figure out the length of the array for the | |
115 | * specific instance of tracepoint. Again, size is the numebr of | |
116 | * items in the array, not the total length in bytes. | |
117 | * | |
118 | * __dynamic_array( int, foo, bar) is similar to: int foo[bar]; | |
119 | * | |
120 | * Note, unlike arrays, you must use the __get_dynamic_array() macro | |
121 | * to access the array. | |
122 | * | |
123 | * memcpy(__get_dynamic_array(foo), bar, 10); | |
124 | * | |
125 | * Notice, that "__entry" is not needed here. | |
126 | * | |
127 | * __string: This is a special kind of __dynamic_array. It expects to | |
128 | * have a nul terminated character array passed to it (it allows | |
129 | * for NULL too, which would be converted into "(null)"). __string | |
130 | * takes two paramenter (name, src), where name is the name of | |
131 | * the string saved, and src is the string to copy into the | |
132 | * ring buffer. | |
133 | * | |
134 | * __string(foo, bar) is similar to: strcpy(foo, bar) | |
135 | * | |
136 | * To assign a string, use the helper macro __assign_str(). | |
137 | * | |
138 | * __assign_str(foo, bar); | |
139 | * | |
140 | * In most cases, the __assign_str() macro will take the same | |
141 | * parameters as the __string() macro had to declare the string. | |
142 | * | |
143 | * __bitmask: This is another kind of __dynamic_array, but it expects | |
144 | * an array of longs, and the number of bits to parse. It takes | |
145 | * two parameters (name, nr_bits), where name is the name of the | |
146 | * bitmask to save, and the nr_bits is the number of bits to record. | |
147 | * | |
148 | * __bitmask(target_cpu, nr_cpumask_bits) | |
149 | * | |
150 | * To assign a bitmask, use the __assign_bitmask() helper macro. | |
151 | * | |
152 | * __assign_bitmask(target_cpus, cpumask_bits(bar), nr_cpumask_bits); | |
9cfe06f8 | 153 | * |
9cfe06f8 SR |
154 | * |
155 | * fast_assign: This is a C like function that is used to store the items | |
4e20e3a6 SRRH |
156 | * into the ring buffer. A special variable called "__entry" will be the |
157 | * structure that points into the ring buffer and has the same fields as | |
158 | * described by the struct part of TRACE_EVENT above. | |
9cfe06f8 SR |
159 | * |
160 | * printk: This is a way to print out the data in pretty print. This is | |
161 | * useful if the system crashes and you are logging via a serial line, | |
162 | * the data can be printed to the console using this "printk" method. | |
4e20e3a6 SRRH |
163 | * This is also used to print out the data from the trace files. |
164 | * Again, the __entry macro is used to access the data from the ring buffer. | |
165 | * | |
166 | * Note, __dynamic_array, __string, and __bitmask require special helpers | |
167 | * to access the data. | |
168 | * | |
169 | * For __dynamic_array(int, foo, bar) use __get_dynamic_array(foo) | |
170 | * Use __get_dynamic_array_len(foo) to get the length of the array | |
d6726c81 SRRH |
171 | * saved. Note, __get_dynamic_array_len() returns the total allocated |
172 | * length of the dynamic array; __print_array() expects the second | |
173 | * parameter to be the number of elements. To get that, the array length | |
174 | * needs to be divided by the element size. | |
4e20e3a6 SRRH |
175 | * |
176 | * For __string(foo, bar) use __get_str(foo) | |
177 | * | |
178 | * For __bitmask(target_cpus, nr_cpumask_bits) use __get_bitmask(target_cpus) | |
179 | * | |
9cfe06f8 SR |
180 | * |
181 | * Note, that for both the assign and the printk, __entry is the handler | |
182 | * to the data structure in the ring buffer, and is defined by the | |
183 | * TP_STRUCT__entry. | |
184 | */ | |
4e20e3a6 SRRH |
185 | |
186 | /* | |
187 | * It is OK to have helper functions in the file, but they need to be protected | |
188 | * from being defined more than once. Remember, this file gets included more | |
189 | * than once. | |
190 | */ | |
191 | #ifndef __TRACE_EVENT_SAMPLE_HELPER_FUNCTIONS | |
192 | #define __TRACE_EVENT_SAMPLE_HELPER_FUNCTIONS | |
193 | static inline int __length_of(const int *list) | |
194 | { | |
195 | int i; | |
196 | ||
197 | if (!list) | |
198 | return 0; | |
199 | ||
200 | for (i = 0; list[i]; i++) | |
201 | ; | |
202 | return i; | |
203 | } | |
32eb3d0d SRRH |
204 | |
205 | enum { | |
206 | TRACE_SAMPLE_FOO = 2, | |
207 | TRACE_SAMPLE_BAR = 4, | |
208 | TRACE_SAMPLE_ZOO = 8, | |
209 | }; | |
4e20e3a6 SRRH |
210 | #endif |
211 | ||
32eb3d0d SRRH |
212 | /* |
213 | * If enums are used in the TP_printk(), their names will be shown in | |
214 | * format files and not their values. This can cause problems with user | |
215 | * space programs that parse the format files to know how to translate | |
216 | * the raw binary trace output into human readable text. | |
217 | * | |
218 | * To help out user space programs, any enum that is used in the TP_printk() | |
219 | * should be defined by TRACE_DEFINE_ENUM() macro. All that is needed to | |
220 | * be done is to add this macro with the enum within it in the trace | |
221 | * header file, and it will be converted in the output. | |
222 | */ | |
223 | ||
224 | TRACE_DEFINE_ENUM(TRACE_SAMPLE_FOO); | |
225 | TRACE_DEFINE_ENUM(TRACE_SAMPLE_BAR); | |
226 | TRACE_DEFINE_ENUM(TRACE_SAMPLE_ZOO); | |
227 | ||
9cfe06f8 SR |
228 | TRACE_EVENT(foo_bar, |
229 | ||
4e20e3a6 SRRH |
230 | TP_PROTO(const char *foo, int bar, const int *lst, |
231 | const char *string, const struct cpumask *mask), | |
9cfe06f8 | 232 | |
4e20e3a6 | 233 | TP_ARGS(foo, bar, lst, string, mask), |
9cfe06f8 SR |
234 | |
235 | TP_STRUCT__entry( | |
236 | __array( char, foo, 10 ) | |
237 | __field( int, bar ) | |
4e20e3a6 SRRH |
238 | __dynamic_array(int, list, __length_of(lst)) |
239 | __string( str, string ) | |
240 | __bitmask( cpus, num_possible_cpus() ) | |
9cfe06f8 SR |
241 | ), |
242 | ||
243 | TP_fast_assign( | |
d8fae2f6 | 244 | strlcpy(__entry->foo, foo, 10); |
9cfe06f8 | 245 | __entry->bar = bar; |
4e20e3a6 SRRH |
246 | memcpy(__get_dynamic_array(list), lst, |
247 | __length_of(lst) * sizeof(int)); | |
248 | __assign_str(str, string); | |
249 | __assign_bitmask(cpus, cpumask_bits(mask), num_possible_cpus()); | |
9cfe06f8 SR |
250 | ), |
251 | ||
32eb3d0d SRRH |
252 | TP_printk("foo %s %d %s %s %s %s (%s)", __entry->foo, __entry->bar, |
253 | ||
254 | /* | |
255 | * Notice here the use of some helper functions. This includes: | |
256 | * | |
257 | * __print_symbolic( variable, { value, "string" }, ... ), | |
258 | * | |
259 | * The variable is tested against each value of the { } pair. If | |
260 | * the variable matches one of the values, then it will print the | |
261 | * string in that pair. If non are matched, it returns a string | |
262 | * version of the number (if __entry->bar == 7 then "7" is returned). | |
263 | */ | |
264 | __print_symbolic(__entry->bar, | |
265 | { 0, "zero" }, | |
266 | { TRACE_SAMPLE_FOO, "TWO" }, | |
267 | { TRACE_SAMPLE_BAR, "FOUR" }, | |
268 | { TRACE_SAMPLE_ZOO, "EIGHT" }, | |
269 | { 10, "TEN" } | |
270 | ), | |
271 | ||
272 | /* | |
273 | * __print_flags( variable, "delim", { value, "flag" }, ... ), | |
274 | * | |
275 | * This is similar to __print_symbolic, except that it tests the bits | |
276 | * of the value. If ((FLAG & variable) == FLAG) then the string is | |
277 | * printed. If more than one flag matches, then each one that does is | |
278 | * also printed with delim in between them. | |
279 | * If not all bits are accounted for, then the not found bits will be | |
280 | * added in hex format: 0x506 will show BIT2|BIT4|0x500 | |
281 | */ | |
282 | __print_flags(__entry->bar, "|", | |
283 | { 1, "BIT1" }, | |
284 | { 2, "BIT2" }, | |
285 | { 4, "BIT3" }, | |
286 | { 8, "BIT4" } | |
287 | ), | |
288 | /* | |
289 | * __print_array( array, len, element_size ) | |
290 | * | |
291 | * This prints out the array that is defined by __array in a nice format. | |
292 | */ | |
4e20e3a6 | 293 | __print_array(__get_dynamic_array(list), |
d6726c81 | 294 | __get_dynamic_array_len(list) / sizeof(int), |
4e20e3a6 SRRH |
295 | sizeof(int)), |
296 | __get_str(str), __get_bitmask(cpus)) | |
9cfe06f8 | 297 | ); |
c4c7eb29 SRRH |
298 | |
299 | /* | |
300 | * There may be a case where a tracepoint should only be called if | |
301 | * some condition is set. Otherwise the tracepoint should not be called. | |
302 | * But to do something like: | |
303 | * | |
304 | * if (cond) | |
305 | * trace_foo(); | |
306 | * | |
307 | * Would cause a little overhead when tracing is not enabled, and that | |
308 | * overhead, even if small, is not something we want. As tracepoints | |
309 | * use static branch (aka jump_labels), where no branch is taken to | |
310 | * skip the tracepoint when not enabled, and a jmp is placed to jump | |
311 | * to the tracepoint code when it is enabled, having a if statement | |
312 | * nullifies that optimization. It would be nice to place that | |
313 | * condition within the static branch. This is where TRACE_EVENT_CONDITION | |
314 | * comes in. | |
315 | * | |
316 | * TRACE_EVENT_CONDITION() is just like TRACE_EVENT, except it adds another | |
317 | * parameter just after args. Where TRACE_EVENT has: | |
318 | * | |
319 | * TRACE_EVENT(name, proto, args, struct, assign, printk) | |
320 | * | |
321 | * the CONDITION version has: | |
322 | * | |
323 | * TRACE_EVENT_CONDITION(name, proto, args, cond, struct, assign, printk) | |
324 | * | |
325 | * Everything is the same as TRACE_EVENT except for the new cond. Think | |
326 | * of the cond variable as: | |
327 | * | |
328 | * if (cond) | |
329 | * trace_foo_bar_with_cond(); | |
330 | * | |
331 | * Except that the logic for the if branch is placed after the static branch. | |
332 | * That is, the if statement that processes the condition will not be | |
333 | * executed unless that traecpoint is enabled. Otherwise it still remains | |
334 | * a nop. | |
335 | */ | |
336 | TRACE_EVENT_CONDITION(foo_bar_with_cond, | |
337 | ||
338 | TP_PROTO(const char *foo, int bar), | |
339 | ||
340 | TP_ARGS(foo, bar), | |
341 | ||
342 | TP_CONDITION(!(bar % 10)), | |
343 | ||
344 | TP_STRUCT__entry( | |
345 | __string( foo, foo ) | |
346 | __field( int, bar ) | |
347 | ), | |
348 | ||
349 | TP_fast_assign( | |
350 | __assign_str(foo, foo); | |
351 | __entry->bar = bar; | |
352 | ), | |
353 | ||
354 | TP_printk("foo %s %d", __get_str(foo), __entry->bar) | |
355 | ); | |
6adc13f8 SRRH |
356 | |
357 | void foo_bar_reg(void); | |
358 | void foo_bar_unreg(void); | |
359 | ||
360 | /* | |
361 | * Now in the case that some function needs to be called when the | |
362 | * tracepoint is enabled and/or when it is disabled, the | |
363 | * TRACE_EVENT_FN() serves this purpose. This is just like TRACE_EVENT() | |
364 | * but adds two more parameters at the end: | |
365 | * | |
366 | * TRACE_EVENT_FN( name, proto, args, struct, assign, printk, reg, unreg) | |
367 | * | |
368 | * reg and unreg are functions with the prototype of: | |
369 | * | |
370 | * void reg(void) | |
371 | * | |
372 | * The reg function gets called before the tracepoint is enabled, and | |
373 | * the unreg function gets called after the tracepoint is disabled. | |
374 | * | |
375 | * Note, reg and unreg are allowed to be NULL. If you only need to | |
376 | * call a function before enabling, or after disabling, just set one | |
377 | * function and pass in NULL for the other parameter. | |
378 | */ | |
379 | TRACE_EVENT_FN(foo_bar_with_fn, | |
380 | ||
381 | TP_PROTO(const char *foo, int bar), | |
382 | ||
383 | TP_ARGS(foo, bar), | |
384 | ||
385 | TP_STRUCT__entry( | |
386 | __string( foo, foo ) | |
387 | __field( int, bar ) | |
388 | ), | |
389 | ||
390 | TP_fast_assign( | |
391 | __assign_str(foo, foo); | |
392 | __entry->bar = bar; | |
393 | ), | |
394 | ||
395 | TP_printk("foo %s %d", __get_str(foo), __entry->bar), | |
396 | ||
397 | foo_bar_reg, foo_bar_unreg | |
398 | ); | |
399 | ||
7496946a SRRH |
400 | /* |
401 | * Each TRACE_EVENT macro creates several helper functions to produce | |
402 | * the code to add the tracepoint, create the files in the trace | |
403 | * directory, hook it to perf, assign the values and to print out | |
404 | * the raw data from the ring buffer. To prevent too much bloat, | |
405 | * if there are more than one tracepoint that uses the same format | |
406 | * for the proto, args, struct, assign and printk, and only the name | |
407 | * is different, it is highly recommended to use the DECLARE_EVENT_CLASS | |
408 | * | |
409 | * DECLARE_EVENT_CLASS() macro creates most of the functions for the | |
410 | * tracepoint. Then DEFINE_EVENT() is use to hook a tracepoint to those | |
411 | * functions. This DEFINE_EVENT() is an instance of the class and can | |
412 | * be enabled and disabled separately from other events (either TRACE_EVENT | |
413 | * or other DEFINE_EVENT()s). | |
414 | * | |
415 | * Note, TRACE_EVENT() itself is simply defined as: | |
416 | * | |
417 | * #define TRACE_EVENT(name, proto, args, tstruct, assign, printk) \ | |
418 | * DEFINE_EVENT_CLASS(name, proto, args, tstruct, assign, printk); \ | |
419 | * DEFINE_EVENT(name, name, proto, args) | |
420 | * | |
421 | * The DEFINE_EVENT() also can be declared with conditions and reg functions: | |
422 | * | |
423 | * DEFINE_EVENT_CONDITION(template, name, proto, args, cond); | |
424 | * DEFINE_EVENT_FN(template, name, proto, args, reg, unreg); | |
425 | */ | |
426 | DECLARE_EVENT_CLASS(foo_template, | |
427 | ||
428 | TP_PROTO(const char *foo, int bar), | |
429 | ||
430 | TP_ARGS(foo, bar), | |
431 | ||
432 | TP_STRUCT__entry( | |
433 | __string( foo, foo ) | |
434 | __field( int, bar ) | |
435 | ), | |
436 | ||
437 | TP_fast_assign( | |
438 | __assign_str(foo, foo); | |
439 | __entry->bar = bar; | |
440 | ), | |
441 | ||
442 | TP_printk("foo %s %d", __get_str(foo), __entry->bar) | |
443 | ); | |
444 | ||
445 | /* | |
446 | * Here's a better way for the previous samples (except, the first | |
447 | * exmaple had more fields and could not be used here). | |
448 | */ | |
449 | DEFINE_EVENT(foo_template, foo_with_template_simple, | |
450 | TP_PROTO(const char *foo, int bar), | |
451 | TP_ARGS(foo, bar)); | |
452 | ||
453 | DEFINE_EVENT_CONDITION(foo_template, foo_with_template_cond, | |
454 | TP_PROTO(const char *foo, int bar), | |
455 | TP_ARGS(foo, bar), | |
456 | TP_CONDITION(!(bar % 8))); | |
457 | ||
458 | ||
459 | DEFINE_EVENT_FN(foo_template, foo_with_template_fn, | |
460 | TP_PROTO(const char *foo, int bar), | |
461 | TP_ARGS(foo, bar), | |
462 | foo_bar_reg, foo_bar_unreg); | |
463 | ||
464 | /* | |
465 | * Anytime two events share basically the same values and have | |
466 | * the same output, use the DECLARE_EVENT_CLASS() and DEFINE_EVENT() | |
467 | * when ever possible. | |
468 | */ | |
469 | ||
470 | /* | |
471 | * If the event is similar to the DECLARE_EVENT_CLASS, but you need | |
472 | * to have a different output, then use DEFINE_EVENT_PRINT() which | |
473 | * lets you override the TP_printk() of the class. | |
474 | */ | |
475 | ||
476 | DEFINE_EVENT_PRINT(foo_template, foo_with_template_print, | |
477 | TP_PROTO(const char *foo, int bar), | |
478 | TP_ARGS(foo, bar), | |
479 | TP_printk("bar %s %d", __get_str(foo), __entry->bar)); | |
480 | ||
9cfe06f8 SR |
481 | #endif |
482 | ||
483 | /***** NOTICE! The #if protection ends here. *****/ | |
484 | ||
485 | ||
486 | /* | |
487 | * There are several ways I could have done this. If I left out the | |
488 | * TRACE_INCLUDE_PATH, then it would default to the kernel source | |
489 | * include/trace/events directory. | |
490 | * | |
491 | * I could specify a path from the define_trace.h file back to this | |
492 | * file. | |
493 | * | |
494 | * #define TRACE_INCLUDE_PATH ../../samples/trace_events | |
495 | * | |
44ad18e0 SR |
496 | * But the safest and easiest way to simply make it use the directory |
497 | * that the file is in is to add in the Makefile: | |
9cfe06f8 | 498 | * |
44ad18e0 | 499 | * CFLAGS_trace-events-sample.o := -I$(src) |
9cfe06f8 SR |
500 | * |
501 | * This will make sure the current path is part of the include | |
44ad18e0 | 502 | * structure for our file so that define_trace.h can find it. |
9cfe06f8 SR |
503 | * |
504 | * I could have made only the top level directory the include: | |
505 | * | |
506 | * CFLAGS_trace-events-sample.o := -I$(PWD) | |
507 | * | |
508 | * And then let the path to this directory be the TRACE_INCLUDE_PATH: | |
509 | * | |
510 | * #define TRACE_INCLUDE_PATH samples/trace_events | |
511 | * | |
44ad18e0 SR |
512 | * But then if something defines "samples" or "trace_events" as a macro |
513 | * then we could risk that being converted too, and give us an unexpected | |
9cfe06f8 SR |
514 | * result. |
515 | */ | |
516 | #undef TRACE_INCLUDE_PATH | |
71e1c8ac | 517 | #undef TRACE_INCLUDE_FILE |
9cfe06f8 | 518 | #define TRACE_INCLUDE_PATH . |
71e1c8ac SR |
519 | /* |
520 | * TRACE_INCLUDE_FILE is not needed if the filename and TRACE_SYSTEM are equal | |
521 | */ | |
522 | #define TRACE_INCLUDE_FILE trace-events-sample | |
9cfe06f8 | 523 | #include <trace/define_trace.h> |