Commit | Line | Data |
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40652b65 | 1 | #include <lttng.h> |
299338c8 | 2 | #include <lttng-types.h> |
d0dd2ecb | 3 | #include <linux/debugfs.h> |
e763dbf5 MD |
4 | #include <linux/ringbuffer/frontend_types.h> |
5 | #include "../ltt-events.h" | |
6db3d13b | 6 | #include "../ltt-tracer-core.h" |
40652b65 | 7 | |
299338c8 MD |
8 | struct lttng_event_field { |
9 | const char *name; | |
10 | const struct lttng_type type; | |
11 | }; | |
12 | ||
13 | struct lttng_event_desc { | |
14 | const struct lttng_event_field *fields; | |
d0dd2ecb MD |
15 | const char *name; |
16 | unsigned int nr_fields; | |
299338c8 | 17 | }; |
40652b65 MD |
18 | |
19 | /* | |
6db3d13b | 20 | * Macro declarations used for all stages. |
40652b65 MD |
21 | */ |
22 | ||
23 | /* | |
24 | * DECLARE_EVENT_CLASS can be used to add a generic function | |
25 | * handlers for events. That is, if all events have the same | |
26 | * parameters and just have distinct trace points. | |
27 | * Each tracepoint can be defined with DEFINE_EVENT and that | |
28 | * will map the DECLARE_EVENT_CLASS to the tracepoint. | |
29 | * | |
30 | * TRACE_EVENT is a one to one mapping between tracepoint and template. | |
31 | */ | |
6db3d13b | 32 | |
40652b65 MD |
33 | #undef TRACE_EVENT |
34 | #define TRACE_EVENT(name, proto, args, tstruct, assign, print) \ | |
35 | DECLARE_EVENT_CLASS(name, \ | |
36 | PARAMS(proto), \ | |
37 | PARAMS(args), \ | |
38 | PARAMS(tstruct), \ | |
39 | PARAMS(assign), \ | |
299338c8 MD |
40 | PARAMS(print)) \ |
41 | DEFINE_EVENT(name, name, PARAMS(proto), PARAMS(args)) | |
40652b65 | 42 | |
6db3d13b MD |
43 | #undef DEFINE_EVENT_PRINT |
44 | #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ | |
45 | DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) | |
46 | ||
47 | /* Callbacks are meaningless to LTTng. */ | |
48 | #undef TRACE_EVENT_FN | |
49 | #define TRACE_EVENT_FN(name, proto, args, tstruct, \ | |
50 | assign, print, reg, unreg) \ | |
51 | TRACE_EVENT(name, PARAMS(proto), PARAMS(args), \ | |
52 | PARAMS(tstruct), PARAMS(assign), PARAMS(print)) \ | |
53 | ||
54 | /* | |
55 | * Stage 1 of the trace events. | |
56 | * | |
57 | * Create event field type metadata section. | |
58 | * Each event produce an array of fields. | |
59 | */ | |
60 | ||
61 | #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */ | |
62 | ||
1d12cebd MD |
63 | /* Named field types must be defined in lttng-types.h */ |
64 | ||
40652b65 | 65 | #undef __field |
299338c8 MD |
66 | #define __field(_type, _item) \ |
67 | { .name = #_item, .type = { .atype = atype_integer, .name = #_type} }, | |
40652b65 MD |
68 | |
69 | #undef __field_ext | |
6db3d13b | 70 | #define __field_ext(_type, _item, _filter_type) __field(_type, _item) |
40652b65 MD |
71 | |
72 | #undef __array | |
299338c8 MD |
73 | #define __array(_type, _item, _length) \ |
74 | { \ | |
75 | .name = #_item, \ | |
76 | .type = { \ | |
77 | .atype = atype_array, \ | |
78 | .name = NULL, \ | |
79 | .u.array.elem_type = #_type, \ | |
80 | .u.array.length = _length, \ | |
81 | }, \ | |
82 | }, | |
40652b65 MD |
83 | |
84 | #undef __dynamic_array | |
299338c8 MD |
85 | #define __dynamic_array(_type, _item, _length) \ |
86 | { \ | |
87 | .name = #_item, \ | |
88 | .type = { \ | |
89 | .atype = atype_sequence, \ | |
90 | .name = NULL, \ | |
91 | .u.sequence.elem_type = #_type, \ | |
92 | .u.sequence.length_type = "u32", \ | |
93 | }, \ | |
94 | }, | |
40652b65 MD |
95 | |
96 | #undef __string | |
1d12cebd | 97 | #define __string(_item, _src) \ |
299338c8 | 98 | { \ |
0d1d4002 | 99 | .name = #_item, \ |
299338c8 MD |
100 | .type = { \ |
101 | .atype = atype_string, \ | |
102 | .name = NULL, \ | |
103 | .u.string.encoding = lttng_encode_UTF8, \ | |
104 | }, \ | |
105 | }, | |
1d12cebd | 106 | |
40652b65 | 107 | #undef TP_STRUCT__entry |
1d12cebd MD |
108 | #define TP_STRUCT__entry(args...) args /* Only one used in this phase */ |
109 | ||
40652b65 | 110 | #undef DECLARE_EVENT_CLASS |
0d1d4002 MD |
111 | #define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print) \ |
112 | static const struct lttng_event_field __event_fields___##_name[] = { \ | |
113 | _tstruct \ | |
299338c8 MD |
114 | }; |
115 | ||
299338c8 MD |
116 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
117 | ||
118 | /* | |
119 | * Stage 2 of the trace events. | |
120 | * | |
121 | * Create an array of events. | |
122 | */ | |
123 | ||
299338c8 MD |
124 | /* Named field types must be defined in lttng-types.h */ |
125 | ||
6db3d13b | 126 | #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */ |
299338c8 | 127 | |
d32a57a2 MD |
128 | #undef DEFINE_EVENT |
129 | #define DEFINE_EVENT(_template, _name, _proto, _args) \ | |
130 | { \ | |
131 | .fields = __event_fields___##_template, \ | |
132 | .name = #_name, \ | |
133 | .nr_fields = ARRAY_SIZE(__event_fields___##_template), \ | |
6db3d13b | 134 | }, |
40652b65 | 135 | |
d0dd2ecb MD |
136 | #define TP_ID1(_token, _system) _token##_system |
137 | #define TP_ID(_token, _system) TP_ID1(_token, _system) | |
40652b65 | 138 | |
d0dd2ecb | 139 | static const struct lttng_event_desc TP_ID(__event_desc___, TRACE_SYSTEM)[] = { |
40652b65 | 140 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
299338c8 MD |
141 | }; |
142 | ||
d0dd2ecb MD |
143 | #undef TP_ID1 |
144 | #undef TP_ID | |
145 | ||
146 | /* | |
147 | * Stage 3 of the trace events. | |
148 | * | |
149 | * Create seq file metadata output. | |
150 | */ | |
151 | ||
d0dd2ecb MD |
152 | #define TP_ID1(_token, _system) _token##_system |
153 | #define TP_ID(_token, _system) TP_ID1(_token, _system) | |
d0dd2ecb MD |
154 | |
155 | static void *TP_ID(__lttng_seq_start__, TRACE_SYSTEM)(struct seq_file *m, | |
156 | loff_t *pos) | |
157 | { | |
6db3d13b MD |
158 | const struct lttng_event_desc *desc = |
159 | &TP_ID(__event_desc___, TRACE_SYSTEM)[*pos]; | |
d0dd2ecb | 160 | |
6db3d13b MD |
161 | if (desc > &TP_ID(__event_desc___, TRACE_SYSTEM) |
162 | [ARRAY_SIZE(TP_ID(__event_desc___, TRACE_SYSTEM)) - 1]) | |
d0dd2ecb MD |
163 | return NULL; |
164 | return (void *) desc; | |
165 | } | |
166 | ||
167 | static void *TP_ID(__lttng_seq_next__, TRACE_SYSTEM)(struct seq_file *m, | |
168 | void *p, loff_t *ppos) | |
169 | { | |
6db3d13b MD |
170 | const struct lttng_event_desc *desc = |
171 | &TP_ID(__event_desc___, TRACE_SYSTEM)[++(*ppos)]; | |
d0dd2ecb | 172 | |
6db3d13b MD |
173 | if (desc > &TP_ID(__event_desc___, TRACE_SYSTEM) |
174 | [ARRAY_SIZE(TP_ID(__event_desc___, TRACE_SYSTEM)) - 1]) | |
d0dd2ecb MD |
175 | return NULL; |
176 | return (void *) desc; | |
177 | } | |
178 | ||
179 | static void TP_ID(__lttng_seq_stop__, TRACE_SYSTEM)(struct seq_file *m, | |
180 | void *p) | |
181 | { | |
182 | } | |
183 | ||
184 | static int TP_ID(__lttng_seq_show__, TRACE_SYSTEM)(struct seq_file *m, | |
185 | void *p) | |
186 | { | |
187 | const struct lttng_event_desc *desc = p; | |
188 | int i; | |
189 | ||
190 | seq_printf(m, "event {\n" | |
191 | "\tname = %s;\n" | |
192 | "\tid = UNKNOWN;\n" | |
193 | "\tstream = UNKNOWN;\n" | |
194 | "\tfields = {\n", | |
195 | desc->name); | |
196 | for (i = 0; i < desc->nr_fields; i++) { | |
197 | if (desc->fields[i].type.name) /* Named type */ | |
198 | seq_printf(m, "\t\t%s", | |
199 | desc->fields[i].type.name); | |
200 | else /* Nameless type */ | |
201 | lttng_print_event_type(m, 2, &desc->fields[i].type); | |
202 | seq_printf(m, " %s;\n", desc->fields[i].name); | |
203 | } | |
204 | seq_printf(m, "\t};\n"); | |
205 | seq_printf(m, "};\n"); | |
206 | return 0; | |
207 | } | |
208 | ||
209 | static const | |
210 | struct seq_operations TP_ID(__lttng_types_seq_ops__, TRACE_SYSTEM) = { | |
211 | .start = TP_ID(__lttng_seq_start__, TRACE_SYSTEM), | |
212 | .next = TP_ID(__lttng_seq_next__, TRACE_SYSTEM), | |
213 | .stop = TP_ID(__lttng_seq_stop__, TRACE_SYSTEM), | |
214 | .show = TP_ID(__lttng_seq_show__, TRACE_SYSTEM), | |
215 | }; | |
216 | ||
217 | static int | |
218 | TP_ID(__lttng_types_open__, TRACE_SYSTEM)(struct inode *inode, struct file *file) | |
219 | { | |
220 | return seq_open(file, &TP_ID(__lttng_types_seq_ops__, TRACE_SYSTEM)); | |
221 | } | |
222 | ||
6db3d13b MD |
223 | static const |
224 | struct file_operations TP_ID(__lttng_types_fops__, TRACE_SYSTEM) = { | |
d0dd2ecb MD |
225 | .open = TP_ID(__lttng_types_open__, TRACE_SYSTEM), |
226 | .read = seq_read, | |
227 | .llseek = seq_lseek, | |
228 | .release = seq_release_private, | |
229 | }; | |
230 | ||
231 | static struct dentry *TP_ID(__lttng_types_dentry__, TRACE_SYSTEM); | |
232 | ||
233 | static int TP_ID(__lttng_types_init__, TRACE_SYSTEM)(void) | |
234 | { | |
235 | int ret = 0; | |
236 | ||
237 | TP_ID(__lttng_types_dentry__, TRACE_SYSTEM) = | |
6db3d13b MD |
238 | debugfs_create_file("lttng-events-" __stringify(TRACE_SYSTEM), |
239 | S_IWUSR, NULL, NULL, | |
240 | &TP_ID(__lttng_types_fops__, TRACE_SYSTEM)); | |
d0dd2ecb MD |
241 | if (IS_ERR(TP_ID(__lttng_types_dentry__, TRACE_SYSTEM)) |
242 | || !TP_ID(__lttng_types_dentry__, TRACE_SYSTEM)) { | |
243 | printk(KERN_ERR "Error creating LTTng type export file\n"); | |
244 | ret = -ENOMEM; | |
245 | goto error; | |
246 | } | |
247 | error: | |
248 | return ret; | |
249 | } | |
250 | ||
d0dd2ecb MD |
251 | static void TP_ID(__lttng_types_exit__, TRACE_SYSTEM)(void) |
252 | { | |
253 | debugfs_remove(TP_ID(__lttng_types_dentry__, TRACE_SYSTEM)); | |
254 | } | |
255 | ||
d0dd2ecb MD |
256 | #undef TP_ID1 |
257 | #undef TP_ID | |
258 | ||
40652b65 | 259 | /* |
6db3d13b | 260 | * Stage 4 of the trace events. |
40652b65 MD |
261 | * |
262 | * Create static inline function that calculates event size. | |
263 | */ | |
264 | ||
6db3d13b | 265 | #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */ |
40652b65 | 266 | |
6db3d13b MD |
267 | /* Named field types must be defined in lttng-types.h */ |
268 | ||
269 | #undef __field | |
85a80742 MD |
270 | #define __field(_type, _item) \ |
271 | __event_len += lib_ring_buffer_align(__event_len, __alignof__(_type)); \ | |
0d1d4002 | 272 | __event_len += sizeof(_type); |
6db3d13b MD |
273 | |
274 | #undef __field_ext | |
275 | #define __field_ext(_type, _item, _filter_type) __field(_type, _item) | |
276 | ||
277 | #undef __array | |
85a80742 MD |
278 | #define __array(_type, _item, _length) \ |
279 | __event_len += lib_ring_buffer_align(__event_len, __alignof__(_type)); \ | |
0d1d4002 | 280 | __event_len += sizeof(_type) * (_length); |
6db3d13b MD |
281 | |
282 | #undef __dynamic_array | |
85a80742 MD |
283 | #define __dynamic_array(_type, _item, _length) \ |
284 | __event_len += lib_ring_buffer_align(__event_len, __alignof__(u32)); \ | |
285 | __event_len += sizeof(u32); \ | |
286 | __event_len += lib_ring_buffer_align(__event_len, __alignof__(_type)); \ | |
0d1d4002 | 287 | __event_len += sizeof(_type) * (_length); |
6db3d13b MD |
288 | |
289 | #undef __string | |
85a80742 | 290 | #define __string(_item, _src) \ |
0d1d4002 MD |
291 | __event_len += __dynamic_len[__dynamic_len_idx++] = strlen(_src) + 1; |
292 | ||
293 | #undef TP_PROTO | |
294 | #define TP_PROTO(args...) args | |
6db3d13b MD |
295 | |
296 | #undef TP_STRUCT__entry | |
0d1d4002 | 297 | #define TP_STRUCT__entry(args...) args |
6db3d13b MD |
298 | |
299 | #undef DECLARE_EVENT_CLASS | |
0d1d4002 MD |
300 | #define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print) \ |
301 | static inline size_t __event_get_size__##_name(size_t *__dynamic_len, _proto) \ | |
302 | { \ | |
303 | size_t __event_len = 0; \ | |
304 | unsigned int __dynamic_len_idx = 0; \ | |
305 | \ | |
306 | if (0) \ | |
307 | (void) __dynamic_len_idx; /* don't warn if unused */ \ | |
308 | _tstruct \ | |
309 | return __event_len; \ | |
6db3d13b | 310 | } |
40652b65 MD |
311 | |
312 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
313 | ||
6db3d13b | 314 | |
6db3d13b | 315 | |
40652b65 | 316 | /* |
e763dbf5 MD |
317 | * Stage 5 of the trace events. |
318 | * | |
319 | * Create static inline function that calculates event payload alignment. | |
320 | */ | |
321 | ||
322 | #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */ | |
323 | ||
324 | /* Named field types must be defined in lttng-types.h */ | |
325 | ||
326 | #undef __field | |
327 | #define __field(_type, _item) \ | |
67e5e60c | 328 | __event_align = max_t(size_t, __event_align, __alignof__(_type)); |
e763dbf5 MD |
329 | |
330 | #undef __field_ext | |
331 | #define __field_ext(_type, _item, _filter_type) __field(_type, _item) | |
332 | ||
333 | #undef __array | |
334 | #define __array(_type, _item, _length) \ | |
67e5e60c | 335 | __event_align = max_t(size_t, __event_align, __alignof__(_type)); |
e763dbf5 MD |
336 | |
337 | #undef __dynamic_array | |
338 | #define __dynamic_array(_type, _item, _length) \ | |
67e5e60c MD |
339 | __event_align = max_t(size_t, __event_align, __alignof__(u32)); \ |
340 | __event_align = max_t(size_t, __event_align, __alignof__(_type)); | |
e763dbf5 MD |
341 | |
342 | #undef __string | |
343 | #define __string(_item, _src) | |
344 | ||
345 | #undef TP_PROTO | |
346 | #define TP_PROTO(args...) args | |
347 | ||
348 | #undef TP_STRUCT__entry | |
349 | #define TP_STRUCT__entry(args...) args | |
350 | ||
351 | #undef DECLARE_EVENT_CLASS | |
352 | #define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print) \ | |
353 | static inline size_t __event_get_align__##_name(_proto) \ | |
354 | { \ | |
355 | size_t __event_align = 1; \ | |
356 | _tstruct \ | |
357 | return __event_align; \ | |
358 | } | |
359 | ||
360 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
361 | ||
362 | ||
e763dbf5 MD |
363 | /* |
364 | * Stage 6 of the trace events. | |
40652b65 | 365 | * |
3c4ffab9 MD |
366 | * Create structure declaration that allows the "assign" macros to access the |
367 | * field types. | |
368 | */ | |
369 | ||
370 | #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */ | |
371 | ||
372 | /* Named field types must be defined in lttng-types.h */ | |
373 | ||
374 | #undef __field | |
375 | #define __field(_type, _item) _type _item; | |
376 | ||
377 | #undef __field_ext | |
378 | #define __field_ext(_type, _item, _filter_type) __field(_type, _item) | |
379 | ||
380 | #undef __array | |
381 | #define __array(_type, _item, _length) _type _item; | |
382 | ||
383 | #undef __dynamic_array | |
384 | #define __dynamic_array(_type, _item, _length) _type _item; | |
385 | ||
386 | #undef __string | |
387 | #define __string(_item, _src) char _item; | |
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 | struct __event_typemap__##_name { \ | |
395 | _tstruct \ | |
396 | }; | |
397 | ||
398 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
399 | ||
400 | ||
401 | /* | |
402 | * Stage 7 of the trace events. | |
403 | * | |
40652b65 MD |
404 | * Create the probe function : call even size calculation and write event data |
405 | * into the buffer. | |
e763dbf5 | 406 | * |
67e5e60c MD |
407 | * We use both the field and assignment macros to write the fields in the order |
408 | * defined in the field declaration. The field declarations control the | |
409 | * execution order, jumping to the appropriate assignment block. | |
40652b65 MD |
410 | */ |
411 | ||
e763dbf5 MD |
412 | #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */ |
413 | ||
414 | #undef __field | |
415 | #define __field(_type, _item) \ | |
e763dbf5 MD |
416 | goto __assign_##_item; \ |
417 | __end_field_##_item: | |
40652b65 | 418 | |
e763dbf5 MD |
419 | #undef __field_ext |
420 | #define __field_ext(_type, _item, _filter_type) __field(_type, _item) | |
40652b65 | 421 | |
e763dbf5 MD |
422 | #undef __array |
423 | #define __array(_type, _item, _length) \ | |
e763dbf5 MD |
424 | goto __assign_##_item; \ |
425 | __end_field_##_item: | |
40652b65 | 426 | |
e763dbf5 MD |
427 | #undef __dynamic_array |
428 | #define __dynamic_array(_type, _item, _length) \ | |
e763dbf5 MD |
429 | goto __assign_##_item##_1; \ |
430 | __end_field_##_item##_1: \ | |
e763dbf5 MD |
431 | goto __assign_##_item##_2; \ |
432 | __end_field_##_item##_2: | |
40652b65 | 433 | |
e763dbf5 MD |
434 | #undef __string |
435 | #define __string(_item, _src) \ | |
436 | goto __assign_##_item; \ | |
437 | __end_field_##_item: | |
438 | ||
439 | /* | |
440 | * Macros mapping tp_assign() to "=", tp_memcpy() to memcpy() and tp_strcpy() to | |
441 | * strcpy(). | |
442 | */ | |
443 | #undef tp_assign | |
444 | #define tp_assign(dest, src) \ | |
445 | __assign_##dest: \ | |
446 | { \ | |
3c4ffab9 MD |
447 | __typeof__(__typemap.dest) __tmp = (src); \ |
448 | lib_ring_buffer_align_ctx(&ctx, __alignof__(__tmp)); \ | |
449 | __chan->ops->event_write(&ctx, &__tmp, sizeof(__tmp)); \ | |
e763dbf5 MD |
450 | } \ |
451 | goto __end_field_##dest; | |
452 | ||
453 | #undef tp_memcpy | |
454 | #define tp_memcpy(dest, src, len) \ | |
455 | __assign_##dest: \ | |
3c4ffab9 | 456 | lib_ring_buffer_align_ctx(&ctx, __alignof__(__typemap.dest)); \ |
e763dbf5 MD |
457 | __chan->ops->event_write(&ctx, src, len); \ |
458 | goto __end_field_##dest; | |
459 | ||
460 | #undef tp_memcpy_dyn | |
461 | #define tp_memcpy_dyn(dest, src, len) \ | |
462 | __assign_##dest##_1: \ | |
463 | { \ | |
3c4ffab9 MD |
464 | u32 __tmpl = (len); \ |
465 | lib_ring_buffer_align_ctx(&ctx, __alignof__(u32)); \ | |
e763dbf5 MD |
466 | __chan->ops->event_write(&ctx, &__tmpl, sizeof(u32)); \ |
467 | } \ | |
468 | goto __end_field_##dest##_1; \ | |
469 | __assign_##dest##_2: \ | |
3c4ffab9 | 470 | lib_ring_buffer_align_ctx(&ctx, __alignof__(__typemap.dest)); \ |
e763dbf5 MD |
471 | __chan->ops->event_write(&ctx, src, len); \ |
472 | goto __end_field_##dest##_2; | |
473 | ||
474 | #undef tp_strcpy | |
475 | #define tp_strcpy(dest, src) \ | |
3c4ffab9 | 476 | tp_memcpy(dest, src, __get_dynamic_array_len(dest)) |
40652b65 | 477 | |
e763dbf5 MD |
478 | /* Named field types must be defined in lttng-types.h */ |
479 | ||
480 | #undef __get_str | |
481 | #define __get_str(field) field | |
482 | ||
483 | #undef __get_dynamic_array | |
484 | #define __get_dynamic_array(field) field | |
485 | ||
486 | /* Beware: this get len actually consumes the len value */ | |
487 | #undef __get_dynamic_array_len | |
488 | #define __get_dynamic_array_len(field) __dynamic_len[__dynamic_len_idx++] | |
489 | ||
490 | #undef TP_PROTO | |
491 | #define TP_PROTO(args...) args | |
492 | ||
493 | #undef TP_ARGS | |
494 | #define TP_ARGS(args...) args | |
495 | ||
496 | #undef TP_STRUCT__entry | |
497 | #define TP_STRUCT__entry(args...) args | |
498 | ||
499 | #undef TP_fast_assign | |
500 | #define TP_fast_assign(args...) args | |
501 | ||
502 | #undef DECLARE_EVENT_CLASS | |
503 | #define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print) \ | |
504 | static void __event_probe__##_name(void *__data, _proto) \ | |
505 | { \ | |
506 | struct ltt_event *__event = __data; \ | |
507 | struct ltt_channel *__chan = __event->chan; \ | |
508 | struct lib_ring_buffer_ctx ctx; \ | |
509 | size_t __event_len, __event_align; \ | |
510 | size_t __dynamic_len_idx = 0; \ | |
511 | size_t __dynamic_len[ARRAY_SIZE(__event_fields___##_name)]; \ | |
3c4ffab9 | 512 | struct __event_typemap__##_name __typemap; \ |
e763dbf5 MD |
513 | int __ret; \ |
514 | \ | |
515 | if (0) \ | |
516 | (void) __dynamic_len_idx; /* don't warn if unused */ \ | |
52fc2e1f MD |
517 | if (!ACCESS_ONCE(__chan->session->active)) \ |
518 | return; \ | |
e763dbf5 MD |
519 | __event_len = __event_get_size__##_name(__dynamic_len, _args); \ |
520 | __event_align = __event_get_align__##_name(_args); \ | |
521 | lib_ring_buffer_ctx_init(&ctx, __chan->chan, NULL, __event_len, \ | |
522 | __event_align, -1); \ | |
523 | __ret = __chan->ops->event_reserve(&ctx); \ | |
524 | if (__ret < 0) \ | |
525 | return; \ | |
526 | /* Control code (field ordering) */ \ | |
527 | _tstruct \ | |
528 | __chan->ops->event_commit(&ctx); \ | |
529 | return; \ | |
530 | /* Copy code, steered by control code */ \ | |
531 | _assign \ | |
532 | } | |
533 | ||
534 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
535 | ||
536 | ||
3afe7aac MD |
537 | /* |
538 | * Stage 8 of the trace events. | |
539 | * | |
540 | * Register/unregister probes at module load/unload. | |
541 | */ | |
542 | ||
543 | #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */ | |
544 | ||
545 | #define TP_ID1(_token, _system) _token##_system | |
546 | #define TP_ID(_token, _system) TP_ID1(_token, _system) | |
547 | #define module_init_eval1(_token, _system) module_init(_token##_system) | |
548 | #define module_init_eval(_token, _system) module_init_eval1(_token, _system) | |
549 | #define module_exit_eval1(_token, _system) module_exit(_token##_system) | |
550 | #define module_exit_eval(_token, _system) module_exit_eval1(_token, _system) | |
551 | ||
552 | #undef DEFINE_EVENT | |
553 | #define DEFINE_EVENT(_template, _name, _proto, _args) \ | |
554 | ret = ltt_probe_register(#_name, (void *) __event_probe__##_template); \ | |
555 | WARN_ON_ONCE(ret); | |
556 | ||
557 | static int TP_ID(__lttng_events_init__, TRACE_SYSTEM)(void) | |
558 | { | |
559 | int ret = 0; | |
560 | ||
561 | ret = TP_ID(__lttng_types_init__, TRACE_SYSTEM)(); | |
562 | if (ret) | |
563 | return ret; | |
564 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
565 | return ret; | |
566 | } | |
567 | ||
568 | module_init_eval(__lttng_events_init__, TRACE_SYSTEM); | |
569 | ||
570 | #undef DEFINE_EVENT | |
571 | #define DEFINE_EVENT(_template, _name, _proto, _args) \ | |
572 | ltt_probe_unregister(#_name); | |
573 | ||
574 | static void TP_ID(__lttng_events_exit__, TRACE_SYSTEM)(void) | |
575 | { | |
576 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
577 | TP_ID(__lttng_types_exit__, TRACE_SYSTEM)(); | |
578 | } | |
579 | ||
580 | module_exit_eval(__lttng_events_exit__, TRACE_SYSTEM); | |
581 | ||
582 | #undef module_init_eval | |
583 | #undef module_exit_eval | |
584 | #undef TP_ID1 | |
585 | #undef TP_ID |