Commit | Line | Data |
---|---|---|
17baffe2 MD |
1 | /* |
2 | * lttng-events.h | |
3 | * | |
4 | * Copyright (C) 2009 Steven Rostedt <rostedt@goodmis.org> | |
5 | * Copyright (C) 2010-2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
6 | * | |
7 | * Dual LGPL v2.1/GPL v2 license. | |
8 | */ | |
9 | ||
d0dd2ecb | 10 | #include <linux/debugfs.h> |
c0edae1d MD |
11 | #include "lttng.h" |
12 | #include "lttng-types.h" | |
b13f3ebe | 13 | #include "../wrapper/vmalloc.h" /* for wrapper_vmalloc_sync_all() */ |
f3bc08c5 | 14 | #include "../wrapper/ringbuffer/frontend_types.h" |
e763dbf5 | 15 | #include "../ltt-events.h" |
6db3d13b | 16 | #include "../ltt-tracer-core.h" |
40652b65 | 17 | |
40652b65 | 18 | /* |
6db3d13b | 19 | * Macro declarations used for all stages. |
40652b65 MD |
20 | */ |
21 | ||
22 | /* | |
23 | * DECLARE_EVENT_CLASS can be used to add a generic function | |
24 | * handlers for events. That is, if all events have the same | |
25 | * parameters and just have distinct trace points. | |
26 | * Each tracepoint can be defined with DEFINE_EVENT and that | |
27 | * will map the DECLARE_EVENT_CLASS to the tracepoint. | |
28 | * | |
29 | * TRACE_EVENT is a one to one mapping between tracepoint and template. | |
30 | */ | |
6db3d13b | 31 | |
40652b65 MD |
32 | #undef TRACE_EVENT |
33 | #define TRACE_EVENT(name, proto, args, tstruct, assign, print) \ | |
34 | DECLARE_EVENT_CLASS(name, \ | |
35 | PARAMS(proto), \ | |
36 | PARAMS(args), \ | |
37 | PARAMS(tstruct), \ | |
38 | PARAMS(assign), \ | |
299338c8 MD |
39 | PARAMS(print)) \ |
40 | DEFINE_EVENT(name, name, PARAMS(proto), PARAMS(args)) | |
40652b65 | 41 | |
f7bdf4db MD |
42 | #undef TRACE_EVENT_NOARGS |
43 | #define TRACE_EVENT_NOARGS(name, tstruct, assign, print) \ | |
44 | DECLARE_EVENT_CLASS_NOARGS(name, \ | |
45 | PARAMS(tstruct), \ | |
46 | PARAMS(assign), \ | |
47 | PARAMS(print)) \ | |
48 | DEFINE_EVENT_NOARGS(name, name) | |
49 | ||
50 | ||
6db3d13b MD |
51 | #undef DEFINE_EVENT_PRINT |
52 | #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ | |
53 | DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) | |
54 | ||
55 | /* Callbacks are meaningless to LTTng. */ | |
56 | #undef TRACE_EVENT_FN | |
57 | #define TRACE_EVENT_FN(name, proto, args, tstruct, \ | |
58 | assign, print, reg, unreg) \ | |
59 | TRACE_EVENT(name, PARAMS(proto), PARAMS(args), \ | |
60 | PARAMS(tstruct), PARAMS(assign), PARAMS(print)) \ | |
61 | ||
f62b389e | 62 | /* |
c099397a | 63 | * Stage 1 of the trace events. |
f62b389e MD |
64 | * |
65 | * Create dummy trace calls for each events, verifying that the LTTng module | |
66 | * TRACE_EVENT headers match the kernel arguments. Will be optimized out by the | |
67 | * compiler. | |
68 | */ | |
69 | ||
70 | #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */ | |
71 | ||
72 | #undef TP_PROTO | |
73 | #define TP_PROTO(args...) args | |
74 | ||
75 | #undef TP_ARGS | |
76 | #define TP_ARGS(args...) args | |
77 | ||
78 | #undef DEFINE_EVENT | |
79 | #define DEFINE_EVENT(_template, _name, _proto, _args) \ | |
7eb827f2 | 80 | void trace_##_name(_proto); |
f62b389e | 81 | |
f7bdf4db MD |
82 | #undef DEFINE_EVENT_NOARGS |
83 | #define DEFINE_EVENT_NOARGS(_template, _name) \ | |
84 | void trace_##_name(void *__data); | |
85 | ||
f62b389e MD |
86 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
87 | ||
6db3d13b | 88 | /* |
c099397a | 89 | * Stage 2 of the trace events. |
6db3d13b MD |
90 | * |
91 | * Create event field type metadata section. | |
92 | * Each event produce an array of fields. | |
93 | */ | |
94 | ||
95 | #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */ | |
96 | ||
1d12cebd MD |
97 | /* Named field types must be defined in lttng-types.h */ |
98 | ||
d71e6471 MD |
99 | #undef __field_full |
100 | #define __field_full(_type, _item, _order, _base) \ | |
c099397a MD |
101 | { \ |
102 | .name = #_item, \ | |
d71e6471 | 103 | .type = __type_integer(_type, _order, _base, none), \ |
c099397a | 104 | }, |
40652b65 | 105 | |
d71e6471 MD |
106 | #undef __field |
107 | #define __field(_type, _item) \ | |
108 | __field_full(_type, _item, __BYTE_ORDER, 10) | |
109 | ||
40652b65 | 110 | #undef __field_ext |
d71e6471 MD |
111 | #define __field_ext(_type, _item, _filter_type) \ |
112 | __field(_type, _item) | |
40652b65 | 113 | |
6d20e0ae MD |
114 | #undef __field_hex |
115 | #define __field_hex(_type, _item) \ | |
116 | __field_full(_type, _item, __BYTE_ORDER, 16) | |
117 | ||
c099397a MD |
118 | #undef __field_network |
119 | #define __field_network(_type, _item) \ | |
d71e6471 MD |
120 | __field_full(_type, _item, __BIG_ENDIAN, 10) |
121 | ||
122 | #undef __field_network_hex | |
123 | #define __field_network_hex(_type, _item) \ | |
124 | __field_full(_type, _item, __BIG_ENDIAN, 16) | |
c099397a | 125 | |
d71e6471 MD |
126 | #undef __array_enc_ext |
127 | #define __array_enc_ext(_type, _item, _length, _order, _base, _encoding)\ | |
299338c8 | 128 | { \ |
c099397a MD |
129 | .name = #_item, \ |
130 | .type = \ | |
131 | { \ | |
299338c8 | 132 | .atype = atype_array, \ |
c099397a MD |
133 | .u.array = \ |
134 | { \ | |
135 | .length = _length, \ | |
d71e6471 | 136 | .elem_type = __type_integer(_type, _order, _base, _encoding), \ |
c099397a | 137 | }, \ |
299338c8 MD |
138 | }, \ |
139 | }, | |
40652b65 | 140 | |
64c796d8 MD |
141 | #undef __array |
142 | #define __array(_type, _item, _length) \ | |
d71e6471 | 143 | __array_enc_ext(_type, _item, _length, __BYTE_ORDER, 10, none) |
64c796d8 MD |
144 | |
145 | #undef __array_text | |
146 | #define __array_text(_type, _item, _length) \ | |
d71e6471 | 147 | __array_enc_ext(_type, _item, _length, __BYTE_ORDER, 10, UTF8) |
64c796d8 | 148 | |
d71e6471 MD |
149 | #undef __array_hex |
150 | #define __array_hex(_type, _item, _length) \ | |
151 | __array_enc_ext(_type, _item, _length, __BYTE_ORDER, 16, none) | |
152 | ||
153 | #undef __dynamic_array_enc_ext | |
154 | #define __dynamic_array_enc_ext(_type, _item, _length, _order, _base, _encoding) \ | |
299338c8 | 155 | { \ |
c099397a MD |
156 | .name = #_item, \ |
157 | .type = \ | |
158 | { \ | |
299338c8 | 159 | .atype = atype_sequence, \ |
c099397a MD |
160 | .u.sequence = \ |
161 | { \ | |
64c796d8 | 162 | .length_type = __type_integer(u32, __BYTE_ORDER, 10, none), \ |
d71e6471 | 163 | .elem_type = __type_integer(_type, _order, _base, _encoding), \ |
c099397a | 164 | }, \ |
299338c8 MD |
165 | }, \ |
166 | }, | |
40652b65 | 167 | |
64c796d8 MD |
168 | #undef __dynamic_array |
169 | #define __dynamic_array(_type, _item, _length) \ | |
d71e6471 | 170 | __dynamic_array_enc_ext(_type, _item, _length, __BYTE_ORDER, 10, none) |
64c796d8 MD |
171 | |
172 | #undef __dynamic_array_text | |
173 | #define __dynamic_array_text(_type, _item, _length) \ | |
d71e6471 MD |
174 | __dynamic_array_enc_ext(_type, _item, _length, __BYTE_ORDER, 10, UTF8) |
175 | ||
176 | #undef __dynamic_array_hex | |
177 | #define __dynamic_array_hex(_type, _item, _length) \ | |
178 | __dynamic_array_enc_ext(_type, _item, _length, __BYTE_ORDER, 16, none) | |
64c796d8 | 179 | |
40652b65 | 180 | #undef __string |
1d12cebd | 181 | #define __string(_item, _src) \ |
299338c8 | 182 | { \ |
c099397a MD |
183 | .name = #_item, \ |
184 | .type = \ | |
185 | { \ | |
299338c8 | 186 | .atype = atype_string, \ |
c099397a | 187 | .u.basic.string.encoding = lttng_encode_UTF8, \ |
299338c8 MD |
188 | }, \ |
189 | }, | |
1d12cebd | 190 | |
40652b65 | 191 | #undef TP_STRUCT__entry |
1d12cebd MD |
192 | #define TP_STRUCT__entry(args...) args /* Only one used in this phase */ |
193 | ||
f7bdf4db MD |
194 | #undef DECLARE_EVENT_CLASS_NOARGS |
195 | #define DECLARE_EVENT_CLASS_NOARGS(_name, _tstruct, _assign, _print) \ | |
0d1d4002 MD |
196 | static const struct lttng_event_field __event_fields___##_name[] = { \ |
197 | _tstruct \ | |
299338c8 MD |
198 | }; |
199 | ||
f7bdf4db MD |
200 | #undef DECLARE_EVENT_CLASS |
201 | #define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print) \ | |
202 | DECLARE_EVENT_CLASS_NOARGS(_name, PARAMS(_tstruct), PARAMS(_assign), \ | |
203 | PARAMS(_print)) | |
204 | ||
299338c8 MD |
205 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
206 | ||
19c57fbf | 207 | /* |
c099397a | 208 | * Stage 3 of the trace events. |
19c57fbf MD |
209 | * |
210 | * Create probe callback prototypes. | |
211 | */ | |
212 | ||
213 | #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */ | |
214 | ||
215 | #undef TP_PROTO | |
216 | #define TP_PROTO(args...) args | |
217 | ||
218 | #undef DECLARE_EVENT_CLASS | |
219 | #define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print) \ | |
220 | static void __event_probe__##_name(void *__data, _proto); | |
221 | ||
f7bdf4db MD |
222 | #undef DECLARE_EVENT_CLASS_NOARGS |
223 | #define DECLARE_EVENT_CLASS_NOARGS(_name, _tstruct, _assign, _print) \ | |
224 | static void __event_probe__##_name(void *__data); | |
225 | ||
19c57fbf MD |
226 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
227 | ||
299338c8 | 228 | /* |
f7bdf4db | 229 | * Stage 3.9 of the trace events. |
299338c8 | 230 | * |
f7bdf4db | 231 | * Create event descriptions. |
299338c8 MD |
232 | */ |
233 | ||
299338c8 MD |
234 | /* Named field types must be defined in lttng-types.h */ |
235 | ||
6db3d13b | 236 | #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */ |
299338c8 | 237 | |
1ec65de1 MD |
238 | #ifndef TP_PROBE_CB |
239 | #define TP_PROBE_CB(_template) &__event_probe__##_template | |
240 | #endif | |
241 | ||
f7bdf4db MD |
242 | #undef DEFINE_EVENT_NOARGS |
243 | #define DEFINE_EVENT_NOARGS(_template, _name) \ | |
244 | static const struct lttng_event_desc __event_desc___##_name = { \ | |
245 | .fields = __event_fields___##_template, \ | |
246 | .name = #_name, \ | |
247 | .probe_callback = (void *) TP_PROBE_CB(_template), \ | |
248 | .nr_fields = ARRAY_SIZE(__event_fields___##_template), \ | |
249 | .owner = THIS_MODULE, \ | |
250 | }; | |
251 | ||
252 | #undef DEFINE_EVENT | |
253 | #define DEFINE_EVENT(_template, _name, _proto, _args) \ | |
254 | DEFINE_EVENT_NOARGS(_template, _name) | |
255 | ||
256 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
257 | ||
258 | ||
259 | /* | |
260 | * Stage 4 of the trace events. | |
261 | * | |
262 | * Create an array of event description pointers. | |
263 | */ | |
264 | ||
265 | /* Named field types must be defined in lttng-types.h */ | |
266 | ||
267 | #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */ | |
268 | ||
269 | #undef DEFINE_EVENT_NOARGS | |
270 | #define DEFINE_EVENT_NOARGS(_template, _name) \ | |
271 | &__event_desc___##_name, | |
272 | ||
d32a57a2 MD |
273 | #undef DEFINE_EVENT |
274 | #define DEFINE_EVENT(_template, _name, _proto, _args) \ | |
f7bdf4db | 275 | DEFINE_EVENT_NOARGS(_template, _name) |
40652b65 | 276 | |
d0dd2ecb MD |
277 | #define TP_ID1(_token, _system) _token##_system |
278 | #define TP_ID(_token, _system) TP_ID1(_token, _system) | |
40652b65 | 279 | |
f7bdf4db | 280 | static const struct lttng_event_desc *TP_ID(__event_desc___, TRACE_SYSTEM)[] = { |
40652b65 | 281 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
299338c8 MD |
282 | }; |
283 | ||
d0dd2ecb MD |
284 | #undef TP_ID1 |
285 | #undef TP_ID | |
286 | ||
85a9ca7f MD |
287 | |
288 | /* | |
c099397a | 289 | * Stage 5 of the trace events. |
85a9ca7f MD |
290 | * |
291 | * Create a toplevel descriptor for the whole probe. | |
292 | */ | |
293 | ||
294 | #define TP_ID1(_token, _system) _token##_system | |
295 | #define TP_ID(_token, _system) TP_ID1(_token, _system) | |
296 | ||
297 | /* non-const because list head will be modified when registered. */ | |
25631135 | 298 | static __used struct lttng_probe_desc TP_ID(__probe_desc___, TRACE_SYSTEM) = { |
85a9ca7f MD |
299 | .event_desc = TP_ID(__event_desc___, TRACE_SYSTEM), |
300 | .nr_events = ARRAY_SIZE(TP_ID(__event_desc___, TRACE_SYSTEM)), | |
301 | }; | |
302 | ||
303 | #undef TP_ID1 | |
304 | #undef TP_ID | |
305 | ||
d0dd2ecb | 306 | /* |
c099397a | 307 | * Stage 6 of the trace events. |
40652b65 MD |
308 | * |
309 | * Create static inline function that calculates event size. | |
310 | */ | |
311 | ||
6db3d13b | 312 | #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */ |
40652b65 | 313 | |
6db3d13b MD |
314 | /* Named field types must be defined in lttng-types.h */ |
315 | ||
d71e6471 MD |
316 | #undef __field_full |
317 | #define __field_full(_type, _item, _order, _base) \ | |
d793d5e1 | 318 | __event_len += lib_ring_buffer_align(__event_len, ltt_alignof(_type)); \ |
0d1d4002 | 319 | __event_len += sizeof(_type); |
6db3d13b | 320 | |
d71e6471 MD |
321 | #undef __array_enc_ext |
322 | #define __array_enc_ext(_type, _item, _length, _order, _base, _encoding) \ | |
d793d5e1 | 323 | __event_len += lib_ring_buffer_align(__event_len, ltt_alignof(_type)); \ |
0d1d4002 | 324 | __event_len += sizeof(_type) * (_length); |
6db3d13b | 325 | |
d71e6471 MD |
326 | #undef __dynamic_array_enc_ext |
327 | #define __dynamic_array_enc_ext(_type, _item, _length, _order, _base, _encoding)\ | |
d793d5e1 | 328 | __event_len += lib_ring_buffer_align(__event_len, ltt_alignof(u32)); \ |
85a80742 | 329 | __event_len += sizeof(u32); \ |
d793d5e1 | 330 | __event_len += lib_ring_buffer_align(__event_len, ltt_alignof(_type)); \ |
41b59694 MD |
331 | __dynamic_len[__dynamic_len_idx] = (_length); \ |
332 | __event_len += sizeof(_type) * __dynamic_len[__dynamic_len_idx]; \ | |
333 | __dynamic_len_idx++; | |
6db3d13b MD |
334 | |
335 | #undef __string | |
85a80742 | 336 | #define __string(_item, _src) \ |
0d1d4002 MD |
337 | __event_len += __dynamic_len[__dynamic_len_idx++] = strlen(_src) + 1; |
338 | ||
339 | #undef TP_PROTO | |
340 | #define TP_PROTO(args...) args | |
6db3d13b MD |
341 | |
342 | #undef TP_STRUCT__entry | |
0d1d4002 | 343 | #define TP_STRUCT__entry(args...) args |
6db3d13b MD |
344 | |
345 | #undef DECLARE_EVENT_CLASS | |
0d1d4002 MD |
346 | #define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print) \ |
347 | static inline size_t __event_get_size__##_name(size_t *__dynamic_len, _proto) \ | |
348 | { \ | |
349 | size_t __event_len = 0; \ | |
350 | unsigned int __dynamic_len_idx = 0; \ | |
351 | \ | |
352 | if (0) \ | |
353 | (void) __dynamic_len_idx; /* don't warn if unused */ \ | |
354 | _tstruct \ | |
355 | return __event_len; \ | |
6db3d13b | 356 | } |
40652b65 MD |
357 | |
358 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
359 | ||
360 | /* | |
c099397a | 361 | * Stage 7 of the trace events. |
e763dbf5 MD |
362 | * |
363 | * Create static inline function that calculates event payload alignment. | |
364 | */ | |
365 | ||
366 | #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */ | |
367 | ||
368 | /* Named field types must be defined in lttng-types.h */ | |
369 | ||
d71e6471 MD |
370 | #undef __field_full |
371 | #define __field_full(_type, _item, _order, _base) \ | |
d793d5e1 | 372 | __event_align = max_t(size_t, __event_align, ltt_alignof(_type)); |
e763dbf5 | 373 | |
d71e6471 MD |
374 | #undef __array_enc_ext |
375 | #define __array_enc_ext(_type, _item, _length, _order, _base, _encoding) \ | |
d793d5e1 | 376 | __event_align = max_t(size_t, __event_align, ltt_alignof(_type)); |
e763dbf5 | 377 | |
d71e6471 MD |
378 | #undef __dynamic_array_enc_ext |
379 | #define __dynamic_array_enc_ext(_type, _item, _length, _order, _base, _encoding)\ | |
d793d5e1 MD |
380 | __event_align = max_t(size_t, __event_align, ltt_alignof(u32)); \ |
381 | __event_align = max_t(size_t, __event_align, ltt_alignof(_type)); | |
e763dbf5 MD |
382 | |
383 | #undef __string | |
384 | #define __string(_item, _src) | |
385 | ||
386 | #undef TP_PROTO | |
387 | #define TP_PROTO(args...) args | |
388 | ||
389 | #undef TP_STRUCT__entry | |
390 | #define TP_STRUCT__entry(args...) args | |
391 | ||
392 | #undef DECLARE_EVENT_CLASS | |
393 | #define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print) \ | |
394 | static inline size_t __event_get_align__##_name(_proto) \ | |
395 | { \ | |
396 | size_t __event_align = 1; \ | |
397 | _tstruct \ | |
398 | return __event_align; \ | |
399 | } | |
400 | ||
401 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
402 | ||
403 | ||
e763dbf5 | 404 | /* |
c099397a | 405 | * Stage 8 of the trace events. |
40652b65 | 406 | * |
3c4ffab9 MD |
407 | * Create structure declaration that allows the "assign" macros to access the |
408 | * field types. | |
409 | */ | |
410 | ||
411 | #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */ | |
412 | ||
413 | /* Named field types must be defined in lttng-types.h */ | |
414 | ||
d71e6471 MD |
415 | #undef __field_full |
416 | #define __field_full(_type, _item, _order, _base) _type _item; | |
3c4ffab9 | 417 | |
d71e6471 MD |
418 | #undef __array_enc_ext |
419 | #define __array_enc_ext(_type, _item, _length, _order, _base, _encoding) \ | |
420 | _type _item; | |
64c796d8 | 421 | |
d71e6471 MD |
422 | #undef __dynamic_array_enc_ext |
423 | #define __dynamic_array_enc_ext(_type, _item, _length, _order, _base, _encoding)\ | |
424 | _type _item; | |
64c796d8 | 425 | |
3c4ffab9 MD |
426 | #undef __string |
427 | #define __string(_item, _src) char _item; | |
428 | ||
429 | #undef TP_STRUCT__entry | |
430 | #define TP_STRUCT__entry(args...) args | |
431 | ||
432 | #undef DECLARE_EVENT_CLASS | |
433 | #define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print) \ | |
434 | struct __event_typemap__##_name { \ | |
435 | _tstruct \ | |
436 | }; | |
437 | ||
438 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
439 | ||
440 | ||
441 | /* | |
c099397a | 442 | * Stage 9 of the trace events. |
3c4ffab9 | 443 | * |
40652b65 MD |
444 | * Create the probe function : call even size calculation and write event data |
445 | * into the buffer. | |
e763dbf5 | 446 | * |
67e5e60c MD |
447 | * We use both the field and assignment macros to write the fields in the order |
448 | * defined in the field declaration. The field declarations control the | |
449 | * execution order, jumping to the appropriate assignment block. | |
40652b65 MD |
450 | */ |
451 | ||
e763dbf5 MD |
452 | #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */ |
453 | ||
d71e6471 MD |
454 | #undef __field_full |
455 | #define __field_full(_type, _item, _order, _base) \ | |
e763dbf5 MD |
456 | goto __assign_##_item; \ |
457 | __end_field_##_item: | |
40652b65 | 458 | |
d71e6471 MD |
459 | #undef __array_enc_ext |
460 | #define __array_enc_ext(_type, _item, _length, _order, _base, _encoding)\ | |
e763dbf5 MD |
461 | goto __assign_##_item; \ |
462 | __end_field_##_item: | |
40652b65 | 463 | |
d71e6471 MD |
464 | #undef __dynamic_array_enc_ext |
465 | #define __dynamic_array_enc_ext(_type, _item, _length, _order, _base, _encoding)\ | |
e763dbf5 MD |
466 | goto __assign_##_item##_1; \ |
467 | __end_field_##_item##_1: \ | |
e763dbf5 MD |
468 | goto __assign_##_item##_2; \ |
469 | __end_field_##_item##_2: | |
40652b65 | 470 | |
e763dbf5 MD |
471 | #undef __string |
472 | #define __string(_item, _src) \ | |
473 | goto __assign_##_item; \ | |
474 | __end_field_##_item: | |
475 | ||
476 | /* | |
477 | * Macros mapping tp_assign() to "=", tp_memcpy() to memcpy() and tp_strcpy() to | |
478 | * strcpy(). | |
479 | */ | |
480 | #undef tp_assign | |
481 | #define tp_assign(dest, src) \ | |
482 | __assign_##dest: \ | |
483 | { \ | |
3c4ffab9 | 484 | __typeof__(__typemap.dest) __tmp = (src); \ |
aaa4004a MD |
485 | lib_ring_buffer_align_ctx(&__ctx, ltt_alignof(__tmp)); \ |
486 | __chan->ops->event_write(&__ctx, &__tmp, sizeof(__tmp));\ | |
e763dbf5 MD |
487 | } \ |
488 | goto __end_field_##dest; | |
489 | ||
490 | #undef tp_memcpy | |
491 | #define tp_memcpy(dest, src, len) \ | |
492 | __assign_##dest: \ | |
d793d5e1 MD |
493 | if (0) \ |
494 | (void) __typemap.dest; \ | |
aaa4004a MD |
495 | lib_ring_buffer_align_ctx(&__ctx, ltt_alignof(__typemap.dest)); \ |
496 | __chan->ops->event_write(&__ctx, src, len); \ | |
e763dbf5 MD |
497 | goto __end_field_##dest; |
498 | ||
499 | #undef tp_memcpy_dyn | |
41b59694 | 500 | #define tp_memcpy_dyn(dest, src) \ |
e763dbf5 MD |
501 | __assign_##dest##_1: \ |
502 | { \ | |
41b59694 | 503 | u32 __tmpl = __dynamic_len[__dynamic_len_idx]; \ |
aaa4004a MD |
504 | lib_ring_buffer_align_ctx(&__ctx, ltt_alignof(u32)); \ |
505 | __chan->ops->event_write(&__ctx, &__tmpl, sizeof(u32)); \ | |
e763dbf5 MD |
506 | } \ |
507 | goto __end_field_##dest##_1; \ | |
508 | __assign_##dest##_2: \ | |
aaa4004a MD |
509 | lib_ring_buffer_align_ctx(&__ctx, ltt_alignof(__typemap.dest)); \ |
510 | __chan->ops->event_write(&__ctx, src, \ | |
41b59694 | 511 | sizeof(__typemap.dest) * __get_dynamic_array_len(dest));\ |
e763dbf5 MD |
512 | goto __end_field_##dest##_2; |
513 | ||
514 | #undef tp_strcpy | |
515 | #define tp_strcpy(dest, src) \ | |
3c4ffab9 | 516 | tp_memcpy(dest, src, __get_dynamic_array_len(dest)) |
40652b65 | 517 | |
e763dbf5 MD |
518 | /* Named field types must be defined in lttng-types.h */ |
519 | ||
520 | #undef __get_str | |
521 | #define __get_str(field) field | |
522 | ||
523 | #undef __get_dynamic_array | |
524 | #define __get_dynamic_array(field) field | |
525 | ||
526 | /* Beware: this get len actually consumes the len value */ | |
527 | #undef __get_dynamic_array_len | |
528 | #define __get_dynamic_array_len(field) __dynamic_len[__dynamic_len_idx++] | |
529 | ||
530 | #undef TP_PROTO | |
531 | #define TP_PROTO(args...) args | |
532 | ||
533 | #undef TP_ARGS | |
534 | #define TP_ARGS(args...) args | |
535 | ||
536 | #undef TP_STRUCT__entry | |
537 | #define TP_STRUCT__entry(args...) args | |
538 | ||
539 | #undef TP_fast_assign | |
540 | #define TP_fast_assign(args...) args | |
541 | ||
542 | #undef DECLARE_EVENT_CLASS | |
543 | #define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print) \ | |
544 | static void __event_probe__##_name(void *__data, _proto) \ | |
545 | { \ | |
546 | struct ltt_event *__event = __data; \ | |
547 | struct ltt_channel *__chan = __event->chan; \ | |
aaa4004a | 548 | struct lib_ring_buffer_ctx __ctx; \ |
e763dbf5 MD |
549 | size_t __event_len, __event_align; \ |
550 | size_t __dynamic_len_idx = 0; \ | |
551 | size_t __dynamic_len[ARRAY_SIZE(__event_fields___##_name)]; \ | |
3c4ffab9 | 552 | struct __event_typemap__##_name __typemap; \ |
e763dbf5 MD |
553 | int __ret; \ |
554 | \ | |
555 | if (0) \ | |
556 | (void) __dynamic_len_idx; /* don't warn if unused */ \ | |
e64957da MD |
557 | if (unlikely(!ACCESS_ONCE(__chan->session->active))) \ |
558 | return; \ | |
559 | if (unlikely(!ACCESS_ONCE(__chan->enabled))) \ | |
560 | return; \ | |
561 | if (unlikely(!ACCESS_ONCE(__event->enabled))) \ | |
52fc2e1f | 562 | return; \ |
e763dbf5 MD |
563 | __event_len = __event_get_size__##_name(__dynamic_len, _args); \ |
564 | __event_align = __event_get_align__##_name(_args); \ | |
aaa4004a | 565 | lib_ring_buffer_ctx_init(&__ctx, __chan->chan, __event, __event_len, \ |
e763dbf5 | 566 | __event_align, -1); \ |
aaa4004a | 567 | __ret = __chan->ops->event_reserve(&__ctx, __event->id); \ |
e763dbf5 MD |
568 | if (__ret < 0) \ |
569 | return; \ | |
570 | /* Control code (field ordering) */ \ | |
571 | _tstruct \ | |
aaa4004a | 572 | __chan->ops->event_commit(&__ctx); \ |
e763dbf5 MD |
573 | return; \ |
574 | /* Copy code, steered by control code */ \ | |
575 | _assign \ | |
576 | } | |
577 | ||
f7bdf4db MD |
578 | #undef DECLARE_EVENT_CLASS_NOARGS |
579 | #define DECLARE_EVENT_CLASS_NOARGS(_name, _tstruct, _assign, _print) \ | |
580 | static void __event_probe__##_name(void *__data) \ | |
581 | { \ | |
582 | struct ltt_event *__event = __data; \ | |
583 | struct ltt_channel *__chan = __event->chan; \ | |
584 | struct lib_ring_buffer_ctx __ctx; \ | |
585 | size_t __event_len, __event_align; \ | |
586 | int __ret; \ | |
587 | \ | |
588 | if (unlikely(!ACCESS_ONCE(__chan->session->active))) \ | |
589 | return; \ | |
590 | if (unlikely(!ACCESS_ONCE(__chan->enabled))) \ | |
591 | return; \ | |
592 | if (unlikely(!ACCESS_ONCE(__event->enabled))) \ | |
593 | return; \ | |
594 | __event_len = 0; \ | |
595 | __event_align = 1; \ | |
596 | lib_ring_buffer_ctx_init(&__ctx, __chan->chan, __event, __event_len, \ | |
597 | __event_align, -1); \ | |
598 | __ret = __chan->ops->event_reserve(&__ctx, __event->id); \ | |
599 | if (__ret < 0) \ | |
600 | return; \ | |
601 | /* Control code (field ordering) */ \ | |
602 | _tstruct \ | |
603 | __chan->ops->event_commit(&__ctx); \ | |
604 | return; \ | |
605 | /* Copy code, steered by control code */ \ | |
606 | _assign \ | |
607 | } | |
608 | ||
e763dbf5 MD |
609 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
610 | ||
3afe7aac | 611 | /* |
c099397a | 612 | * Stage 10 of the trace events. |
3afe7aac MD |
613 | * |
614 | * Register/unregister probes at module load/unload. | |
615 | */ | |
616 | ||
617 | #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */ | |
618 | ||
619 | #define TP_ID1(_token, _system) _token##_system | |
620 | #define TP_ID(_token, _system) TP_ID1(_token, _system) | |
621 | #define module_init_eval1(_token, _system) module_init(_token##_system) | |
622 | #define module_init_eval(_token, _system) module_init_eval1(_token, _system) | |
623 | #define module_exit_eval1(_token, _system) module_exit(_token##_system) | |
624 | #define module_exit_eval(_token, _system) module_exit_eval1(_token, _system) | |
625 | ||
259b6cb3 | 626 | #ifndef TP_MODULE_OVERRIDE |
3afe7aac MD |
627 | static int TP_ID(__lttng_events_init__, TRACE_SYSTEM)(void) |
628 | { | |
6d2a620c | 629 | wrapper_vmalloc_sync_all(); |
259b6cb3 | 630 | return ltt_probe_register(&TP_ID(__probe_desc___, TRACE_SYSTEM)); |
3afe7aac MD |
631 | } |
632 | ||
633 | module_init_eval(__lttng_events_init__, TRACE_SYSTEM); | |
634 | ||
3afe7aac MD |
635 | static void TP_ID(__lttng_events_exit__, TRACE_SYSTEM)(void) |
636 | { | |
259b6cb3 | 637 | ltt_probe_unregister(&TP_ID(__probe_desc___, TRACE_SYSTEM)); |
3afe7aac MD |
638 | } |
639 | ||
640 | module_exit_eval(__lttng_events_exit__, TRACE_SYSTEM); | |
259b6cb3 | 641 | #endif |
3afe7aac MD |
642 | |
643 | #undef module_init_eval | |
644 | #undef module_exit_eval | |
645 | #undef TP_ID1 | |
646 | #undef TP_ID | |
177b3692 MD |
647 | |
648 | #undef TP_PROTO | |
649 | #undef TP_ARGS | |
650 | #undef TRACE_EVENT_FLAGS |