Commit | Line | Data |
---|---|---|
d0dd2ecb | 1 | #include <linux/debugfs.h> |
c0edae1d MD |
2 | #include "lttng.h" |
3 | #include "lttng-types.h" | |
b13f3ebe | 4 | #include "../wrapper/vmalloc.h" /* for wrapper_vmalloc_sync_all() */ |
f3bc08c5 | 5 | #include "../wrapper/ringbuffer/frontend_types.h" |
e763dbf5 | 6 | #include "../ltt-events.h" |
6db3d13b | 7 | #include "../ltt-tracer-core.h" |
40652b65 | 8 | |
40652b65 | 9 | /* |
6db3d13b | 10 | * Macro declarations used for all stages. |
40652b65 MD |
11 | */ |
12 | ||
13 | /* | |
14 | * DECLARE_EVENT_CLASS can be used to add a generic function | |
15 | * handlers for events. That is, if all events have the same | |
16 | * parameters and just have distinct trace points. | |
17 | * Each tracepoint can be defined with DEFINE_EVENT and that | |
18 | * will map the DECLARE_EVENT_CLASS to the tracepoint. | |
19 | * | |
20 | * TRACE_EVENT is a one to one mapping between tracepoint and template. | |
21 | */ | |
6db3d13b | 22 | |
40652b65 MD |
23 | #undef TRACE_EVENT |
24 | #define TRACE_EVENT(name, proto, args, tstruct, assign, print) \ | |
25 | DECLARE_EVENT_CLASS(name, \ | |
26 | PARAMS(proto), \ | |
27 | PARAMS(args), \ | |
28 | PARAMS(tstruct), \ | |
29 | PARAMS(assign), \ | |
299338c8 MD |
30 | PARAMS(print)) \ |
31 | DEFINE_EVENT(name, name, PARAMS(proto), PARAMS(args)) | |
40652b65 | 32 | |
6db3d13b MD |
33 | #undef DEFINE_EVENT_PRINT |
34 | #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ | |
35 | DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) | |
36 | ||
37 | /* Callbacks are meaningless to LTTng. */ | |
38 | #undef TRACE_EVENT_FN | |
39 | #define TRACE_EVENT_FN(name, proto, args, tstruct, \ | |
40 | assign, print, reg, unreg) \ | |
41 | TRACE_EVENT(name, PARAMS(proto), PARAMS(args), \ | |
42 | PARAMS(tstruct), PARAMS(assign), PARAMS(print)) \ | |
43 | ||
f62b389e MD |
44 | /* |
45 | * Stage 0.1 of the trace events. | |
46 | * | |
47 | * Create dummy trace calls for each events, verifying that the LTTng module | |
48 | * TRACE_EVENT headers match the kernel arguments. Will be optimized out by the | |
49 | * compiler. | |
50 | */ | |
51 | ||
52 | #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */ | |
53 | ||
54 | #undef TP_PROTO | |
55 | #define TP_PROTO(args...) args | |
56 | ||
57 | #undef TP_ARGS | |
58 | #define TP_ARGS(args...) args | |
59 | ||
60 | #undef DEFINE_EVENT | |
61 | #define DEFINE_EVENT(_template, _name, _proto, _args) \ | |
7eb827f2 | 62 | void trace_##_name(_proto); |
f62b389e MD |
63 | |
64 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
65 | ||
6db3d13b MD |
66 | /* |
67 | * Stage 1 of the trace events. | |
68 | * | |
69 | * Create event field type metadata section. | |
70 | * Each event produce an array of fields. | |
71 | */ | |
72 | ||
73 | #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */ | |
74 | ||
1d12cebd MD |
75 | /* Named field types must be defined in lttng-types.h */ |
76 | ||
40652b65 | 77 | #undef __field |
299338c8 MD |
78 | #define __field(_type, _item) \ |
79 | { .name = #_item, .type = { .atype = atype_integer, .name = #_type} }, | |
40652b65 MD |
80 | |
81 | #undef __field_ext | |
6db3d13b | 82 | #define __field_ext(_type, _item, _filter_type) __field(_type, _item) |
40652b65 MD |
83 | |
84 | #undef __array | |
299338c8 MD |
85 | #define __array(_type, _item, _length) \ |
86 | { \ | |
87 | .name = #_item, \ | |
88 | .type = { \ | |
89 | .atype = atype_array, \ | |
90 | .name = NULL, \ | |
91 | .u.array.elem_type = #_type, \ | |
92 | .u.array.length = _length, \ | |
93 | }, \ | |
94 | }, | |
40652b65 MD |
95 | |
96 | #undef __dynamic_array | |
299338c8 MD |
97 | #define __dynamic_array(_type, _item, _length) \ |
98 | { \ | |
99 | .name = #_item, \ | |
100 | .type = { \ | |
101 | .atype = atype_sequence, \ | |
102 | .name = NULL, \ | |
103 | .u.sequence.elem_type = #_type, \ | |
104 | .u.sequence.length_type = "u32", \ | |
105 | }, \ | |
106 | }, | |
40652b65 MD |
107 | |
108 | #undef __string | |
1d12cebd | 109 | #define __string(_item, _src) \ |
299338c8 | 110 | { \ |
0d1d4002 | 111 | .name = #_item, \ |
299338c8 MD |
112 | .type = { \ |
113 | .atype = atype_string, \ | |
114 | .name = NULL, \ | |
115 | .u.string.encoding = lttng_encode_UTF8, \ | |
116 | }, \ | |
117 | }, | |
1d12cebd | 118 | |
40652b65 | 119 | #undef TP_STRUCT__entry |
1d12cebd MD |
120 | #define TP_STRUCT__entry(args...) args /* Only one used in this phase */ |
121 | ||
40652b65 | 122 | #undef DECLARE_EVENT_CLASS |
0d1d4002 MD |
123 | #define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print) \ |
124 | static const struct lttng_event_field __event_fields___##_name[] = { \ | |
125 | _tstruct \ | |
299338c8 MD |
126 | }; |
127 | ||
299338c8 MD |
128 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
129 | ||
19c57fbf MD |
130 | /* |
131 | * Stage 1.1 of the trace events. | |
132 | * | |
133 | * Create probe callback prototypes. | |
134 | */ | |
135 | ||
136 | #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */ | |
137 | ||
138 | #undef TP_PROTO | |
139 | #define TP_PROTO(args...) args | |
140 | ||
141 | #undef DECLARE_EVENT_CLASS | |
142 | #define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print) \ | |
143 | static void __event_probe__##_name(void *__data, _proto); | |
144 | ||
145 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
146 | ||
299338c8 MD |
147 | /* |
148 | * Stage 2 of the trace events. | |
149 | * | |
150 | * Create an array of events. | |
151 | */ | |
152 | ||
299338c8 MD |
153 | /* Named field types must be defined in lttng-types.h */ |
154 | ||
6db3d13b | 155 | #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */ |
299338c8 | 156 | |
d32a57a2 MD |
157 | #undef DEFINE_EVENT |
158 | #define DEFINE_EVENT(_template, _name, _proto, _args) \ | |
159 | { \ | |
160 | .fields = __event_fields___##_template, \ | |
161 | .name = #_name, \ | |
19c57fbf | 162 | .probe_callback = (void *) &__event_probe__##_template,\ |
d32a57a2 | 163 | .nr_fields = ARRAY_SIZE(__event_fields___##_template), \ |
6db3d13b | 164 | }, |
40652b65 | 165 | |
d0dd2ecb MD |
166 | #define TP_ID1(_token, _system) _token##_system |
167 | #define TP_ID(_token, _system) TP_ID1(_token, _system) | |
40652b65 | 168 | |
d0dd2ecb | 169 | static const struct lttng_event_desc TP_ID(__event_desc___, TRACE_SYSTEM)[] = { |
40652b65 | 170 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
299338c8 MD |
171 | }; |
172 | ||
d0dd2ecb MD |
173 | #undef TP_ID1 |
174 | #undef TP_ID | |
175 | ||
85a9ca7f MD |
176 | |
177 | /* | |
178 | * Stage 2.1 of the trace events. | |
179 | * | |
180 | * Create a toplevel descriptor for the whole probe. | |
181 | */ | |
182 | ||
183 | #define TP_ID1(_token, _system) _token##_system | |
184 | #define TP_ID(_token, _system) TP_ID1(_token, _system) | |
185 | ||
186 | /* non-const because list head will be modified when registered. */ | |
187 | static struct lttng_probe_desc TP_ID(__probe_desc___, TRACE_SYSTEM) = { | |
188 | .event_desc = TP_ID(__event_desc___, TRACE_SYSTEM), | |
189 | .nr_events = ARRAY_SIZE(TP_ID(__event_desc___, TRACE_SYSTEM)), | |
190 | }; | |
191 | ||
192 | #undef TP_ID1 | |
193 | #undef TP_ID | |
194 | ||
d0dd2ecb MD |
195 | /* |
196 | * Stage 3 of the trace events. | |
197 | * | |
198 | * Create seq file metadata output. | |
199 | */ | |
200 | ||
d0dd2ecb MD |
201 | #define TP_ID1(_token, _system) _token##_system |
202 | #define TP_ID(_token, _system) TP_ID1(_token, _system) | |
d0dd2ecb MD |
203 | |
204 | static void *TP_ID(__lttng_seq_start__, TRACE_SYSTEM)(struct seq_file *m, | |
205 | loff_t *pos) | |
206 | { | |
6db3d13b MD |
207 | const struct lttng_event_desc *desc = |
208 | &TP_ID(__event_desc___, TRACE_SYSTEM)[*pos]; | |
d0dd2ecb | 209 | |
6db3d13b MD |
210 | if (desc > &TP_ID(__event_desc___, TRACE_SYSTEM) |
211 | [ARRAY_SIZE(TP_ID(__event_desc___, TRACE_SYSTEM)) - 1]) | |
d0dd2ecb MD |
212 | return NULL; |
213 | return (void *) desc; | |
214 | } | |
215 | ||
216 | static void *TP_ID(__lttng_seq_next__, TRACE_SYSTEM)(struct seq_file *m, | |
217 | void *p, loff_t *ppos) | |
218 | { | |
6db3d13b MD |
219 | const struct lttng_event_desc *desc = |
220 | &TP_ID(__event_desc___, TRACE_SYSTEM)[++(*ppos)]; | |
d0dd2ecb | 221 | |
6db3d13b MD |
222 | if (desc > &TP_ID(__event_desc___, TRACE_SYSTEM) |
223 | [ARRAY_SIZE(TP_ID(__event_desc___, TRACE_SYSTEM)) - 1]) | |
d0dd2ecb MD |
224 | return NULL; |
225 | return (void *) desc; | |
226 | } | |
227 | ||
228 | static void TP_ID(__lttng_seq_stop__, TRACE_SYSTEM)(struct seq_file *m, | |
229 | void *p) | |
230 | { | |
231 | } | |
232 | ||
233 | static int TP_ID(__lttng_seq_show__, TRACE_SYSTEM)(struct seq_file *m, | |
234 | void *p) | |
235 | { | |
236 | const struct lttng_event_desc *desc = p; | |
237 | int i; | |
238 | ||
239 | seq_printf(m, "event {\n" | |
240 | "\tname = %s;\n" | |
241 | "\tid = UNKNOWN;\n" | |
242 | "\tstream = UNKNOWN;\n" | |
243 | "\tfields = {\n", | |
244 | desc->name); | |
245 | for (i = 0; i < desc->nr_fields; i++) { | |
246 | if (desc->fields[i].type.name) /* Named type */ | |
247 | seq_printf(m, "\t\t%s", | |
248 | desc->fields[i].type.name); | |
249 | else /* Nameless type */ | |
250 | lttng_print_event_type(m, 2, &desc->fields[i].type); | |
251 | seq_printf(m, " %s;\n", desc->fields[i].name); | |
252 | } | |
253 | seq_printf(m, "\t};\n"); | |
254 | seq_printf(m, "};\n"); | |
255 | return 0; | |
256 | } | |
257 | ||
258 | static const | |
259 | struct seq_operations TP_ID(__lttng_types_seq_ops__, TRACE_SYSTEM) = { | |
260 | .start = TP_ID(__lttng_seq_start__, TRACE_SYSTEM), | |
261 | .next = TP_ID(__lttng_seq_next__, TRACE_SYSTEM), | |
262 | .stop = TP_ID(__lttng_seq_stop__, TRACE_SYSTEM), | |
263 | .show = TP_ID(__lttng_seq_show__, TRACE_SYSTEM), | |
264 | }; | |
265 | ||
266 | static int | |
267 | TP_ID(__lttng_types_open__, TRACE_SYSTEM)(struct inode *inode, struct file *file) | |
268 | { | |
269 | return seq_open(file, &TP_ID(__lttng_types_seq_ops__, TRACE_SYSTEM)); | |
270 | } | |
271 | ||
6db3d13b MD |
272 | static const |
273 | struct file_operations TP_ID(__lttng_types_fops__, TRACE_SYSTEM) = { | |
d0dd2ecb MD |
274 | .open = TP_ID(__lttng_types_open__, TRACE_SYSTEM), |
275 | .read = seq_read, | |
276 | .llseek = seq_lseek, | |
277 | .release = seq_release_private, | |
278 | }; | |
279 | ||
280 | static struct dentry *TP_ID(__lttng_types_dentry__, TRACE_SYSTEM); | |
281 | ||
282 | static int TP_ID(__lttng_types_init__, TRACE_SYSTEM)(void) | |
283 | { | |
284 | int ret = 0; | |
285 | ||
286 | TP_ID(__lttng_types_dentry__, TRACE_SYSTEM) = | |
6db3d13b MD |
287 | debugfs_create_file("lttng-events-" __stringify(TRACE_SYSTEM), |
288 | S_IWUSR, NULL, NULL, | |
289 | &TP_ID(__lttng_types_fops__, TRACE_SYSTEM)); | |
d0dd2ecb MD |
290 | if (IS_ERR(TP_ID(__lttng_types_dentry__, TRACE_SYSTEM)) |
291 | || !TP_ID(__lttng_types_dentry__, TRACE_SYSTEM)) { | |
292 | printk(KERN_ERR "Error creating LTTng type export file\n"); | |
293 | ret = -ENOMEM; | |
294 | goto error; | |
295 | } | |
296 | error: | |
297 | return ret; | |
298 | } | |
299 | ||
d0dd2ecb MD |
300 | static void TP_ID(__lttng_types_exit__, TRACE_SYSTEM)(void) |
301 | { | |
302 | debugfs_remove(TP_ID(__lttng_types_dentry__, TRACE_SYSTEM)); | |
303 | } | |
304 | ||
d0dd2ecb MD |
305 | #undef TP_ID1 |
306 | #undef TP_ID | |
307 | ||
40652b65 | 308 | /* |
6db3d13b | 309 | * Stage 4 of the trace events. |
40652b65 MD |
310 | * |
311 | * Create static inline function that calculates event size. | |
312 | */ | |
313 | ||
6db3d13b | 314 | #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */ |
40652b65 | 315 | |
6db3d13b MD |
316 | /* Named field types must be defined in lttng-types.h */ |
317 | ||
318 | #undef __field | |
85a80742 MD |
319 | #define __field(_type, _item) \ |
320 | __event_len += lib_ring_buffer_align(__event_len, __alignof__(_type)); \ | |
0d1d4002 | 321 | __event_len += sizeof(_type); |
6db3d13b MD |
322 | |
323 | #undef __field_ext | |
324 | #define __field_ext(_type, _item, _filter_type) __field(_type, _item) | |
325 | ||
326 | #undef __array | |
85a80742 MD |
327 | #define __array(_type, _item, _length) \ |
328 | __event_len += lib_ring_buffer_align(__event_len, __alignof__(_type)); \ | |
0d1d4002 | 329 | __event_len += sizeof(_type) * (_length); |
6db3d13b MD |
330 | |
331 | #undef __dynamic_array | |
85a80742 MD |
332 | #define __dynamic_array(_type, _item, _length) \ |
333 | __event_len += lib_ring_buffer_align(__event_len, __alignof__(u32)); \ | |
334 | __event_len += sizeof(u32); \ | |
335 | __event_len += lib_ring_buffer_align(__event_len, __alignof__(_type)); \ | |
0d1d4002 | 336 | __event_len += sizeof(_type) * (_length); |
6db3d13b MD |
337 | |
338 | #undef __string | |
85a80742 | 339 | #define __string(_item, _src) \ |
0d1d4002 MD |
340 | __event_len += __dynamic_len[__dynamic_len_idx++] = strlen(_src) + 1; |
341 | ||
342 | #undef TP_PROTO | |
343 | #define TP_PROTO(args...) args | |
6db3d13b MD |
344 | |
345 | #undef TP_STRUCT__entry | |
0d1d4002 | 346 | #define TP_STRUCT__entry(args...) args |
6db3d13b MD |
347 | |
348 | #undef DECLARE_EVENT_CLASS | |
0d1d4002 MD |
349 | #define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print) \ |
350 | static inline size_t __event_get_size__##_name(size_t *__dynamic_len, _proto) \ | |
351 | { \ | |
352 | size_t __event_len = 0; \ | |
353 | unsigned int __dynamic_len_idx = 0; \ | |
354 | \ | |
355 | if (0) \ | |
356 | (void) __dynamic_len_idx; /* don't warn if unused */ \ | |
357 | _tstruct \ | |
358 | return __event_len; \ | |
6db3d13b | 359 | } |
40652b65 MD |
360 | |
361 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
362 | ||
6db3d13b | 363 | |
6db3d13b | 364 | |
40652b65 | 365 | /* |
e763dbf5 MD |
366 | * Stage 5 of the trace events. |
367 | * | |
368 | * Create static inline function that calculates event payload alignment. | |
369 | */ | |
370 | ||
371 | #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */ | |
372 | ||
373 | /* Named field types must be defined in lttng-types.h */ | |
374 | ||
375 | #undef __field | |
376 | #define __field(_type, _item) \ | |
67e5e60c | 377 | __event_align = max_t(size_t, __event_align, __alignof__(_type)); |
e763dbf5 MD |
378 | |
379 | #undef __field_ext | |
380 | #define __field_ext(_type, _item, _filter_type) __field(_type, _item) | |
381 | ||
382 | #undef __array | |
383 | #define __array(_type, _item, _length) \ | |
67e5e60c | 384 | __event_align = max_t(size_t, __event_align, __alignof__(_type)); |
e763dbf5 MD |
385 | |
386 | #undef __dynamic_array | |
387 | #define __dynamic_array(_type, _item, _length) \ | |
67e5e60c MD |
388 | __event_align = max_t(size_t, __event_align, __alignof__(u32)); \ |
389 | __event_align = max_t(size_t, __event_align, __alignof__(_type)); | |
e763dbf5 MD |
390 | |
391 | #undef __string | |
392 | #define __string(_item, _src) | |
393 | ||
394 | #undef TP_PROTO | |
395 | #define TP_PROTO(args...) args | |
396 | ||
397 | #undef TP_STRUCT__entry | |
398 | #define TP_STRUCT__entry(args...) args | |
399 | ||
400 | #undef DECLARE_EVENT_CLASS | |
401 | #define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print) \ | |
402 | static inline size_t __event_get_align__##_name(_proto) \ | |
403 | { \ | |
404 | size_t __event_align = 1; \ | |
405 | _tstruct \ | |
406 | return __event_align; \ | |
407 | } | |
408 | ||
409 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
410 | ||
411 | ||
e763dbf5 MD |
412 | /* |
413 | * Stage 6 of the trace events. | |
40652b65 | 414 | * |
3c4ffab9 MD |
415 | * Create structure declaration that allows the "assign" macros to access the |
416 | * field types. | |
417 | */ | |
418 | ||
419 | #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */ | |
420 | ||
421 | /* Named field types must be defined in lttng-types.h */ | |
422 | ||
423 | #undef __field | |
424 | #define __field(_type, _item) _type _item; | |
425 | ||
426 | #undef __field_ext | |
427 | #define __field_ext(_type, _item, _filter_type) __field(_type, _item) | |
428 | ||
429 | #undef __array | |
430 | #define __array(_type, _item, _length) _type _item; | |
431 | ||
432 | #undef __dynamic_array | |
433 | #define __dynamic_array(_type, _item, _length) _type _item; | |
434 | ||
435 | #undef __string | |
436 | #define __string(_item, _src) char _item; | |
437 | ||
438 | #undef TP_STRUCT__entry | |
439 | #define TP_STRUCT__entry(args...) args | |
440 | ||
441 | #undef DECLARE_EVENT_CLASS | |
442 | #define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print) \ | |
443 | struct __event_typemap__##_name { \ | |
444 | _tstruct \ | |
445 | }; | |
446 | ||
447 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
448 | ||
449 | ||
450 | /* | |
451 | * Stage 7 of the trace events. | |
452 | * | |
40652b65 MD |
453 | * Create the probe function : call even size calculation and write event data |
454 | * into the buffer. | |
e763dbf5 | 455 | * |
67e5e60c MD |
456 | * We use both the field and assignment macros to write the fields in the order |
457 | * defined in the field declaration. The field declarations control the | |
458 | * execution order, jumping to the appropriate assignment block. | |
40652b65 MD |
459 | */ |
460 | ||
e763dbf5 MD |
461 | #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */ |
462 | ||
463 | #undef __field | |
464 | #define __field(_type, _item) \ | |
e763dbf5 MD |
465 | goto __assign_##_item; \ |
466 | __end_field_##_item: | |
40652b65 | 467 | |
e763dbf5 MD |
468 | #undef __field_ext |
469 | #define __field_ext(_type, _item, _filter_type) __field(_type, _item) | |
40652b65 | 470 | |
e763dbf5 MD |
471 | #undef __array |
472 | #define __array(_type, _item, _length) \ | |
e763dbf5 MD |
473 | goto __assign_##_item; \ |
474 | __end_field_##_item: | |
40652b65 | 475 | |
e763dbf5 MD |
476 | #undef __dynamic_array |
477 | #define __dynamic_array(_type, _item, _length) \ | |
e763dbf5 MD |
478 | goto __assign_##_item##_1; \ |
479 | __end_field_##_item##_1: \ | |
e763dbf5 MD |
480 | goto __assign_##_item##_2; \ |
481 | __end_field_##_item##_2: | |
40652b65 | 482 | |
e763dbf5 MD |
483 | #undef __string |
484 | #define __string(_item, _src) \ | |
485 | goto __assign_##_item; \ | |
486 | __end_field_##_item: | |
487 | ||
488 | /* | |
489 | * Macros mapping tp_assign() to "=", tp_memcpy() to memcpy() and tp_strcpy() to | |
490 | * strcpy(). | |
491 | */ | |
492 | #undef tp_assign | |
493 | #define tp_assign(dest, src) \ | |
494 | __assign_##dest: \ | |
495 | { \ | |
3c4ffab9 MD |
496 | __typeof__(__typemap.dest) __tmp = (src); \ |
497 | lib_ring_buffer_align_ctx(&ctx, __alignof__(__tmp)); \ | |
498 | __chan->ops->event_write(&ctx, &__tmp, sizeof(__tmp)); \ | |
e763dbf5 MD |
499 | } \ |
500 | goto __end_field_##dest; | |
501 | ||
502 | #undef tp_memcpy | |
503 | #define tp_memcpy(dest, src, len) \ | |
504 | __assign_##dest: \ | |
3c4ffab9 | 505 | lib_ring_buffer_align_ctx(&ctx, __alignof__(__typemap.dest)); \ |
e763dbf5 MD |
506 | __chan->ops->event_write(&ctx, src, len); \ |
507 | goto __end_field_##dest; | |
508 | ||
509 | #undef tp_memcpy_dyn | |
510 | #define tp_memcpy_dyn(dest, src, len) \ | |
511 | __assign_##dest##_1: \ | |
512 | { \ | |
3c4ffab9 MD |
513 | u32 __tmpl = (len); \ |
514 | lib_ring_buffer_align_ctx(&ctx, __alignof__(u32)); \ | |
e763dbf5 MD |
515 | __chan->ops->event_write(&ctx, &__tmpl, sizeof(u32)); \ |
516 | } \ | |
517 | goto __end_field_##dest##_1; \ | |
518 | __assign_##dest##_2: \ | |
3c4ffab9 | 519 | lib_ring_buffer_align_ctx(&ctx, __alignof__(__typemap.dest)); \ |
e763dbf5 MD |
520 | __chan->ops->event_write(&ctx, src, len); \ |
521 | goto __end_field_##dest##_2; | |
522 | ||
523 | #undef tp_strcpy | |
524 | #define tp_strcpy(dest, src) \ | |
3c4ffab9 | 525 | tp_memcpy(dest, src, __get_dynamic_array_len(dest)) |
40652b65 | 526 | |
e763dbf5 MD |
527 | /* Named field types must be defined in lttng-types.h */ |
528 | ||
529 | #undef __get_str | |
530 | #define __get_str(field) field | |
531 | ||
532 | #undef __get_dynamic_array | |
533 | #define __get_dynamic_array(field) field | |
534 | ||
535 | /* Beware: this get len actually consumes the len value */ | |
536 | #undef __get_dynamic_array_len | |
537 | #define __get_dynamic_array_len(field) __dynamic_len[__dynamic_len_idx++] | |
538 | ||
539 | #undef TP_PROTO | |
540 | #define TP_PROTO(args...) args | |
541 | ||
542 | #undef TP_ARGS | |
543 | #define TP_ARGS(args...) args | |
544 | ||
545 | #undef TP_STRUCT__entry | |
546 | #define TP_STRUCT__entry(args...) args | |
547 | ||
548 | #undef TP_fast_assign | |
549 | #define TP_fast_assign(args...) args | |
550 | ||
551 | #undef DECLARE_EVENT_CLASS | |
552 | #define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print) \ | |
553 | static void __event_probe__##_name(void *__data, _proto) \ | |
554 | { \ | |
555 | struct ltt_event *__event = __data; \ | |
556 | struct ltt_channel *__chan = __event->chan; \ | |
557 | struct lib_ring_buffer_ctx ctx; \ | |
558 | size_t __event_len, __event_align; \ | |
559 | size_t __dynamic_len_idx = 0; \ | |
560 | size_t __dynamic_len[ARRAY_SIZE(__event_fields___##_name)]; \ | |
3c4ffab9 | 561 | struct __event_typemap__##_name __typemap; \ |
e763dbf5 MD |
562 | int __ret; \ |
563 | \ | |
564 | if (0) \ | |
565 | (void) __dynamic_len_idx; /* don't warn if unused */ \ | |
52fc2e1f MD |
566 | if (!ACCESS_ONCE(__chan->session->active)) \ |
567 | return; \ | |
e763dbf5 MD |
568 | __event_len = __event_get_size__##_name(__dynamic_len, _args); \ |
569 | __event_align = __event_get_align__##_name(_args); \ | |
570 | lib_ring_buffer_ctx_init(&ctx, __chan->chan, NULL, __event_len, \ | |
571 | __event_align, -1); \ | |
572 | __ret = __chan->ops->event_reserve(&ctx); \ | |
573 | if (__ret < 0) \ | |
574 | return; \ | |
575 | /* Control code (field ordering) */ \ | |
576 | _tstruct \ | |
577 | __chan->ops->event_commit(&ctx); \ | |
578 | return; \ | |
579 | /* Copy code, steered by control code */ \ | |
580 | _assign \ | |
581 | } | |
582 | ||
583 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
584 | ||
3afe7aac MD |
585 | /* |
586 | * Stage 8 of the trace events. | |
587 | * | |
588 | * Register/unregister probes at module load/unload. | |
589 | */ | |
590 | ||
591 | #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */ | |
592 | ||
593 | #define TP_ID1(_token, _system) _token##_system | |
594 | #define TP_ID(_token, _system) TP_ID1(_token, _system) | |
595 | #define module_init_eval1(_token, _system) module_init(_token##_system) | |
596 | #define module_init_eval(_token, _system) module_init_eval1(_token, _system) | |
597 | #define module_exit_eval1(_token, _system) module_exit(_token##_system) | |
598 | #define module_exit_eval(_token, _system) module_exit_eval1(_token, _system) | |
599 | ||
3afe7aac MD |
600 | static int TP_ID(__lttng_events_init__, TRACE_SYSTEM)(void) |
601 | { | |
19c57fbf | 602 | int ret; |
3afe7aac | 603 | |
6d2a620c | 604 | wrapper_vmalloc_sync_all(); |
3afe7aac MD |
605 | ret = TP_ID(__lttng_types_init__, TRACE_SYSTEM)(); |
606 | if (ret) | |
607 | return ret; | |
85a9ca7f | 608 | return ltt_probe_register(&TP_ID(__probe_desc___, TRACE_SYSTEM)); |
3afe7aac MD |
609 | } |
610 | ||
611 | module_init_eval(__lttng_events_init__, TRACE_SYSTEM); | |
612 | ||
3afe7aac MD |
613 | static void TP_ID(__lttng_events_exit__, TRACE_SYSTEM)(void) |
614 | { | |
3afe7aac | 615 | TP_ID(__lttng_types_exit__, TRACE_SYSTEM)(); |
85a9ca7f | 616 | ltt_probe_unregister(&TP_ID(__probe_desc___, TRACE_SYSTEM)); |
3afe7aac MD |
617 | } |
618 | ||
619 | module_exit_eval(__lttng_events_exit__, TRACE_SYSTEM); | |
620 | ||
621 | #undef module_init_eval | |
622 | #undef module_exit_eval | |
623 | #undef TP_ID1 | |
624 | #undef TP_ID |