Commit | Line | Data |
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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 | ||
176 | /* | |
177 | * Stage 3 of the trace events. | |
178 | * | |
179 | * Create seq file metadata output. | |
180 | */ | |
181 | ||
d0dd2ecb MD |
182 | #define TP_ID1(_token, _system) _token##_system |
183 | #define TP_ID(_token, _system) TP_ID1(_token, _system) | |
d0dd2ecb MD |
184 | |
185 | static void *TP_ID(__lttng_seq_start__, TRACE_SYSTEM)(struct seq_file *m, | |
186 | loff_t *pos) | |
187 | { | |
6db3d13b MD |
188 | const struct lttng_event_desc *desc = |
189 | &TP_ID(__event_desc___, TRACE_SYSTEM)[*pos]; | |
d0dd2ecb | 190 | |
6db3d13b MD |
191 | if (desc > &TP_ID(__event_desc___, TRACE_SYSTEM) |
192 | [ARRAY_SIZE(TP_ID(__event_desc___, TRACE_SYSTEM)) - 1]) | |
d0dd2ecb MD |
193 | return NULL; |
194 | return (void *) desc; | |
195 | } | |
196 | ||
197 | static void *TP_ID(__lttng_seq_next__, TRACE_SYSTEM)(struct seq_file *m, | |
198 | void *p, loff_t *ppos) | |
199 | { | |
6db3d13b MD |
200 | const struct lttng_event_desc *desc = |
201 | &TP_ID(__event_desc___, TRACE_SYSTEM)[++(*ppos)]; | |
d0dd2ecb | 202 | |
6db3d13b MD |
203 | if (desc > &TP_ID(__event_desc___, TRACE_SYSTEM) |
204 | [ARRAY_SIZE(TP_ID(__event_desc___, TRACE_SYSTEM)) - 1]) | |
d0dd2ecb MD |
205 | return NULL; |
206 | return (void *) desc; | |
207 | } | |
208 | ||
209 | static void TP_ID(__lttng_seq_stop__, TRACE_SYSTEM)(struct seq_file *m, | |
210 | void *p) | |
211 | { | |
212 | } | |
213 | ||
214 | static int TP_ID(__lttng_seq_show__, TRACE_SYSTEM)(struct seq_file *m, | |
215 | void *p) | |
216 | { | |
217 | const struct lttng_event_desc *desc = p; | |
218 | int i; | |
219 | ||
220 | seq_printf(m, "event {\n" | |
221 | "\tname = %s;\n" | |
222 | "\tid = UNKNOWN;\n" | |
223 | "\tstream = UNKNOWN;\n" | |
224 | "\tfields = {\n", | |
225 | desc->name); | |
226 | for (i = 0; i < desc->nr_fields; i++) { | |
227 | if (desc->fields[i].type.name) /* Named type */ | |
228 | seq_printf(m, "\t\t%s", | |
229 | desc->fields[i].type.name); | |
230 | else /* Nameless type */ | |
231 | lttng_print_event_type(m, 2, &desc->fields[i].type); | |
232 | seq_printf(m, " %s;\n", desc->fields[i].name); | |
233 | } | |
234 | seq_printf(m, "\t};\n"); | |
235 | seq_printf(m, "};\n"); | |
236 | return 0; | |
237 | } | |
238 | ||
239 | static const | |
240 | struct seq_operations TP_ID(__lttng_types_seq_ops__, TRACE_SYSTEM) = { | |
241 | .start = TP_ID(__lttng_seq_start__, TRACE_SYSTEM), | |
242 | .next = TP_ID(__lttng_seq_next__, TRACE_SYSTEM), | |
243 | .stop = TP_ID(__lttng_seq_stop__, TRACE_SYSTEM), | |
244 | .show = TP_ID(__lttng_seq_show__, TRACE_SYSTEM), | |
245 | }; | |
246 | ||
247 | static int | |
248 | TP_ID(__lttng_types_open__, TRACE_SYSTEM)(struct inode *inode, struct file *file) | |
249 | { | |
250 | return seq_open(file, &TP_ID(__lttng_types_seq_ops__, TRACE_SYSTEM)); | |
251 | } | |
252 | ||
6db3d13b MD |
253 | static const |
254 | struct file_operations TP_ID(__lttng_types_fops__, TRACE_SYSTEM) = { | |
d0dd2ecb MD |
255 | .open = TP_ID(__lttng_types_open__, TRACE_SYSTEM), |
256 | .read = seq_read, | |
257 | .llseek = seq_lseek, | |
258 | .release = seq_release_private, | |
259 | }; | |
260 | ||
261 | static struct dentry *TP_ID(__lttng_types_dentry__, TRACE_SYSTEM); | |
262 | ||
263 | static int TP_ID(__lttng_types_init__, TRACE_SYSTEM)(void) | |
264 | { | |
265 | int ret = 0; | |
266 | ||
267 | TP_ID(__lttng_types_dentry__, TRACE_SYSTEM) = | |
6db3d13b MD |
268 | debugfs_create_file("lttng-events-" __stringify(TRACE_SYSTEM), |
269 | S_IWUSR, NULL, NULL, | |
270 | &TP_ID(__lttng_types_fops__, TRACE_SYSTEM)); | |
d0dd2ecb MD |
271 | if (IS_ERR(TP_ID(__lttng_types_dentry__, TRACE_SYSTEM)) |
272 | || !TP_ID(__lttng_types_dentry__, TRACE_SYSTEM)) { | |
273 | printk(KERN_ERR "Error creating LTTng type export file\n"); | |
274 | ret = -ENOMEM; | |
275 | goto error; | |
276 | } | |
277 | error: | |
278 | return ret; | |
279 | } | |
280 | ||
d0dd2ecb MD |
281 | static void TP_ID(__lttng_types_exit__, TRACE_SYSTEM)(void) |
282 | { | |
283 | debugfs_remove(TP_ID(__lttng_types_dentry__, TRACE_SYSTEM)); | |
284 | } | |
285 | ||
d0dd2ecb MD |
286 | #undef TP_ID1 |
287 | #undef TP_ID | |
288 | ||
40652b65 | 289 | /* |
6db3d13b | 290 | * Stage 4 of the trace events. |
40652b65 MD |
291 | * |
292 | * Create static inline function that calculates event size. | |
293 | */ | |
294 | ||
6db3d13b | 295 | #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */ |
40652b65 | 296 | |
6db3d13b MD |
297 | /* Named field types must be defined in lttng-types.h */ |
298 | ||
299 | #undef __field | |
85a80742 MD |
300 | #define __field(_type, _item) \ |
301 | __event_len += lib_ring_buffer_align(__event_len, __alignof__(_type)); \ | |
0d1d4002 | 302 | __event_len += sizeof(_type); |
6db3d13b MD |
303 | |
304 | #undef __field_ext | |
305 | #define __field_ext(_type, _item, _filter_type) __field(_type, _item) | |
306 | ||
307 | #undef __array | |
85a80742 MD |
308 | #define __array(_type, _item, _length) \ |
309 | __event_len += lib_ring_buffer_align(__event_len, __alignof__(_type)); \ | |
0d1d4002 | 310 | __event_len += sizeof(_type) * (_length); |
6db3d13b MD |
311 | |
312 | #undef __dynamic_array | |
85a80742 MD |
313 | #define __dynamic_array(_type, _item, _length) \ |
314 | __event_len += lib_ring_buffer_align(__event_len, __alignof__(u32)); \ | |
315 | __event_len += sizeof(u32); \ | |
316 | __event_len += lib_ring_buffer_align(__event_len, __alignof__(_type)); \ | |
0d1d4002 | 317 | __event_len += sizeof(_type) * (_length); |
6db3d13b MD |
318 | |
319 | #undef __string | |
85a80742 | 320 | #define __string(_item, _src) \ |
0d1d4002 MD |
321 | __event_len += __dynamic_len[__dynamic_len_idx++] = strlen(_src) + 1; |
322 | ||
323 | #undef TP_PROTO | |
324 | #define TP_PROTO(args...) args | |
6db3d13b MD |
325 | |
326 | #undef TP_STRUCT__entry | |
0d1d4002 | 327 | #define TP_STRUCT__entry(args...) args |
6db3d13b MD |
328 | |
329 | #undef DECLARE_EVENT_CLASS | |
0d1d4002 MD |
330 | #define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print) \ |
331 | static inline size_t __event_get_size__##_name(size_t *__dynamic_len, _proto) \ | |
332 | { \ | |
333 | size_t __event_len = 0; \ | |
334 | unsigned int __dynamic_len_idx = 0; \ | |
335 | \ | |
336 | if (0) \ | |
337 | (void) __dynamic_len_idx; /* don't warn if unused */ \ | |
338 | _tstruct \ | |
339 | return __event_len; \ | |
6db3d13b | 340 | } |
40652b65 MD |
341 | |
342 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
343 | ||
6db3d13b | 344 | |
6db3d13b | 345 | |
40652b65 | 346 | /* |
e763dbf5 MD |
347 | * Stage 5 of the trace events. |
348 | * | |
349 | * Create static inline function that calculates event payload alignment. | |
350 | */ | |
351 | ||
352 | #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */ | |
353 | ||
354 | /* Named field types must be defined in lttng-types.h */ | |
355 | ||
356 | #undef __field | |
357 | #define __field(_type, _item) \ | |
67e5e60c | 358 | __event_align = max_t(size_t, __event_align, __alignof__(_type)); |
e763dbf5 MD |
359 | |
360 | #undef __field_ext | |
361 | #define __field_ext(_type, _item, _filter_type) __field(_type, _item) | |
362 | ||
363 | #undef __array | |
364 | #define __array(_type, _item, _length) \ | |
67e5e60c | 365 | __event_align = max_t(size_t, __event_align, __alignof__(_type)); |
e763dbf5 MD |
366 | |
367 | #undef __dynamic_array | |
368 | #define __dynamic_array(_type, _item, _length) \ | |
67e5e60c MD |
369 | __event_align = max_t(size_t, __event_align, __alignof__(u32)); \ |
370 | __event_align = max_t(size_t, __event_align, __alignof__(_type)); | |
e763dbf5 MD |
371 | |
372 | #undef __string | |
373 | #define __string(_item, _src) | |
374 | ||
375 | #undef TP_PROTO | |
376 | #define TP_PROTO(args...) args | |
377 | ||
378 | #undef TP_STRUCT__entry | |
379 | #define TP_STRUCT__entry(args...) args | |
380 | ||
381 | #undef DECLARE_EVENT_CLASS | |
382 | #define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print) \ | |
383 | static inline size_t __event_get_align__##_name(_proto) \ | |
384 | { \ | |
385 | size_t __event_align = 1; \ | |
386 | _tstruct \ | |
387 | return __event_align; \ | |
388 | } | |
389 | ||
390 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
391 | ||
392 | ||
e763dbf5 MD |
393 | /* |
394 | * Stage 6 of the trace events. | |
40652b65 | 395 | * |
3c4ffab9 MD |
396 | * Create structure declaration that allows the "assign" macros to access the |
397 | * field types. | |
398 | */ | |
399 | ||
400 | #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */ | |
401 | ||
402 | /* Named field types must be defined in lttng-types.h */ | |
403 | ||
404 | #undef __field | |
405 | #define __field(_type, _item) _type _item; | |
406 | ||
407 | #undef __field_ext | |
408 | #define __field_ext(_type, _item, _filter_type) __field(_type, _item) | |
409 | ||
410 | #undef __array | |
411 | #define __array(_type, _item, _length) _type _item; | |
412 | ||
413 | #undef __dynamic_array | |
414 | #define __dynamic_array(_type, _item, _length) _type _item; | |
415 | ||
416 | #undef __string | |
417 | #define __string(_item, _src) char _item; | |
418 | ||
419 | #undef TP_STRUCT__entry | |
420 | #define TP_STRUCT__entry(args...) args | |
421 | ||
422 | #undef DECLARE_EVENT_CLASS | |
423 | #define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print) \ | |
424 | struct __event_typemap__##_name { \ | |
425 | _tstruct \ | |
426 | }; | |
427 | ||
428 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
429 | ||
430 | ||
431 | /* | |
432 | * Stage 7 of the trace events. | |
433 | * | |
40652b65 MD |
434 | * Create the probe function : call even size calculation and write event data |
435 | * into the buffer. | |
e763dbf5 | 436 | * |
67e5e60c MD |
437 | * We use both the field and assignment macros to write the fields in the order |
438 | * defined in the field declaration. The field declarations control the | |
439 | * execution order, jumping to the appropriate assignment block. | |
40652b65 MD |
440 | */ |
441 | ||
e763dbf5 MD |
442 | #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */ |
443 | ||
444 | #undef __field | |
445 | #define __field(_type, _item) \ | |
e763dbf5 MD |
446 | goto __assign_##_item; \ |
447 | __end_field_##_item: | |
40652b65 | 448 | |
e763dbf5 MD |
449 | #undef __field_ext |
450 | #define __field_ext(_type, _item, _filter_type) __field(_type, _item) | |
40652b65 | 451 | |
e763dbf5 MD |
452 | #undef __array |
453 | #define __array(_type, _item, _length) \ | |
e763dbf5 MD |
454 | goto __assign_##_item; \ |
455 | __end_field_##_item: | |
40652b65 | 456 | |
e763dbf5 MD |
457 | #undef __dynamic_array |
458 | #define __dynamic_array(_type, _item, _length) \ | |
e763dbf5 MD |
459 | goto __assign_##_item##_1; \ |
460 | __end_field_##_item##_1: \ | |
e763dbf5 MD |
461 | goto __assign_##_item##_2; \ |
462 | __end_field_##_item##_2: | |
40652b65 | 463 | |
e763dbf5 MD |
464 | #undef __string |
465 | #define __string(_item, _src) \ | |
466 | goto __assign_##_item; \ | |
467 | __end_field_##_item: | |
468 | ||
469 | /* | |
470 | * Macros mapping tp_assign() to "=", tp_memcpy() to memcpy() and tp_strcpy() to | |
471 | * strcpy(). | |
472 | */ | |
473 | #undef tp_assign | |
474 | #define tp_assign(dest, src) \ | |
475 | __assign_##dest: \ | |
476 | { \ | |
3c4ffab9 MD |
477 | __typeof__(__typemap.dest) __tmp = (src); \ |
478 | lib_ring_buffer_align_ctx(&ctx, __alignof__(__tmp)); \ | |
479 | __chan->ops->event_write(&ctx, &__tmp, sizeof(__tmp)); \ | |
e763dbf5 MD |
480 | } \ |
481 | goto __end_field_##dest; | |
482 | ||
483 | #undef tp_memcpy | |
484 | #define tp_memcpy(dest, src, len) \ | |
485 | __assign_##dest: \ | |
3c4ffab9 | 486 | lib_ring_buffer_align_ctx(&ctx, __alignof__(__typemap.dest)); \ |
e763dbf5 MD |
487 | __chan->ops->event_write(&ctx, src, len); \ |
488 | goto __end_field_##dest; | |
489 | ||
490 | #undef tp_memcpy_dyn | |
491 | #define tp_memcpy_dyn(dest, src, len) \ | |
492 | __assign_##dest##_1: \ | |
493 | { \ | |
3c4ffab9 MD |
494 | u32 __tmpl = (len); \ |
495 | lib_ring_buffer_align_ctx(&ctx, __alignof__(u32)); \ | |
e763dbf5 MD |
496 | __chan->ops->event_write(&ctx, &__tmpl, sizeof(u32)); \ |
497 | } \ | |
498 | goto __end_field_##dest##_1; \ | |
499 | __assign_##dest##_2: \ | |
3c4ffab9 | 500 | lib_ring_buffer_align_ctx(&ctx, __alignof__(__typemap.dest)); \ |
e763dbf5 MD |
501 | __chan->ops->event_write(&ctx, src, len); \ |
502 | goto __end_field_##dest##_2; | |
503 | ||
504 | #undef tp_strcpy | |
505 | #define tp_strcpy(dest, src) \ | |
3c4ffab9 | 506 | tp_memcpy(dest, src, __get_dynamic_array_len(dest)) |
40652b65 | 507 | |
e763dbf5 MD |
508 | /* Named field types must be defined in lttng-types.h */ |
509 | ||
510 | #undef __get_str | |
511 | #define __get_str(field) field | |
512 | ||
513 | #undef __get_dynamic_array | |
514 | #define __get_dynamic_array(field) field | |
515 | ||
516 | /* Beware: this get len actually consumes the len value */ | |
517 | #undef __get_dynamic_array_len | |
518 | #define __get_dynamic_array_len(field) __dynamic_len[__dynamic_len_idx++] | |
519 | ||
520 | #undef TP_PROTO | |
521 | #define TP_PROTO(args...) args | |
522 | ||
523 | #undef TP_ARGS | |
524 | #define TP_ARGS(args...) args | |
525 | ||
526 | #undef TP_STRUCT__entry | |
527 | #define TP_STRUCT__entry(args...) args | |
528 | ||
529 | #undef TP_fast_assign | |
530 | #define TP_fast_assign(args...) args | |
531 | ||
532 | #undef DECLARE_EVENT_CLASS | |
533 | #define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print) \ | |
534 | static void __event_probe__##_name(void *__data, _proto) \ | |
535 | { \ | |
536 | struct ltt_event *__event = __data; \ | |
537 | struct ltt_channel *__chan = __event->chan; \ | |
538 | struct lib_ring_buffer_ctx ctx; \ | |
539 | size_t __event_len, __event_align; \ | |
540 | size_t __dynamic_len_idx = 0; \ | |
541 | size_t __dynamic_len[ARRAY_SIZE(__event_fields___##_name)]; \ | |
3c4ffab9 | 542 | struct __event_typemap__##_name __typemap; \ |
e763dbf5 MD |
543 | int __ret; \ |
544 | \ | |
545 | if (0) \ | |
546 | (void) __dynamic_len_idx; /* don't warn if unused */ \ | |
52fc2e1f MD |
547 | if (!ACCESS_ONCE(__chan->session->active)) \ |
548 | return; \ | |
e763dbf5 MD |
549 | __event_len = __event_get_size__##_name(__dynamic_len, _args); \ |
550 | __event_align = __event_get_align__##_name(_args); \ | |
551 | lib_ring_buffer_ctx_init(&ctx, __chan->chan, NULL, __event_len, \ | |
552 | __event_align, -1); \ | |
553 | __ret = __chan->ops->event_reserve(&ctx); \ | |
554 | if (__ret < 0) \ | |
555 | return; \ | |
556 | /* Control code (field ordering) */ \ | |
557 | _tstruct \ | |
558 | __chan->ops->event_commit(&ctx); \ | |
559 | return; \ | |
560 | /* Copy code, steered by control code */ \ | |
561 | _assign \ | |
562 | } | |
563 | ||
564 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
565 | ||
3afe7aac MD |
566 | /* |
567 | * Stage 8 of the trace events. | |
568 | * | |
569 | * Register/unregister probes at module load/unload. | |
570 | */ | |
571 | ||
572 | #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */ | |
573 | ||
574 | #define TP_ID1(_token, _system) _token##_system | |
575 | #define TP_ID(_token, _system) TP_ID1(_token, _system) | |
576 | #define module_init_eval1(_token, _system) module_init(_token##_system) | |
577 | #define module_init_eval(_token, _system) module_init_eval1(_token, _system) | |
578 | #define module_exit_eval1(_token, _system) module_exit(_token##_system) | |
579 | #define module_exit_eval(_token, _system) module_exit_eval1(_token, _system) | |
580 | ||
3afe7aac MD |
581 | static int TP_ID(__lttng_events_init__, TRACE_SYSTEM)(void) |
582 | { | |
19c57fbf MD |
583 | int ret; |
584 | int i; | |
3afe7aac | 585 | |
6d2a620c | 586 | wrapper_vmalloc_sync_all(); |
3afe7aac MD |
587 | ret = TP_ID(__lttng_types_init__, TRACE_SYSTEM)(); |
588 | if (ret) | |
589 | return ret; | |
19c57fbf MD |
590 | for (i = 0; i < ARRAY_SIZE(TP_ID(__event_desc___, TRACE_SYSTEM)); i++) { |
591 | const struct lttng_event_desc *event_desc; | |
592 | ||
593 | event_desc = &TP_ID(__event_desc___, TRACE_SYSTEM)[i]; | |
594 | ret = ltt_probe_register(event_desc->name, | |
595 | event_desc->probe_callback); | |
596 | if (ret) | |
597 | goto error; | |
598 | } | |
599 | return 0; | |
600 | ||
601 | error: | |
602 | for (i--; i >= 0; i--) { | |
603 | const struct lttng_event_desc *event_desc; | |
604 | ||
605 | event_desc = &TP_ID(__event_desc___, TRACE_SYSTEM)[i]; | |
606 | ltt_probe_unregister(event_desc->name); | |
607 | } | |
3afe7aac MD |
608 | return ret; |
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 | { | |
19c57fbf MD |
615 | int i; |
616 | ||
617 | for (i = 0; i < ARRAY_SIZE(TP_ID(__event_desc___, TRACE_SYSTEM)); i++) { | |
618 | const struct lttng_event_desc *event_desc; | |
619 | ||
620 | event_desc = &TP_ID(__event_desc___, TRACE_SYSTEM)[i]; | |
621 | ltt_probe_unregister(event_desc->name); | |
622 | } | |
3afe7aac MD |
623 | TP_ID(__lttng_types_exit__, TRACE_SYSTEM)(); |
624 | } | |
625 | ||
626 | module_exit_eval(__lttng_events_exit__, TRACE_SYSTEM); | |
627 | ||
628 | #undef module_init_eval | |
629 | #undef module_exit_eval | |
630 | #undef TP_ID1 | |
631 | #undef TP_ID |