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1 | |
e277c2f1 |
2 | #define __KERNEL__ |
3 | |
6ef4987c |
4 | #include <assert.h> |
5 | #include <sys/types.h> |
6 | #include <stdint.h> |
7 | #include <stdlib.h> |
3e090fd3 |
8 | #include <string.h> |
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9 | |
e277c2f1 |
10 | #include <linux/compiler.h> |
11 | |
6ef4987c |
12 | #define min(a,b) (((a)<(b))?a:b) |
13 | #define max(a,b) (((a)>(b))?a:b) |
14 | #define BUG_ON(a) assert(!(a)) |
15 | |
e277c2f1 |
16 | // Useful outsize __KERNEL__. Not used here because inline is already redefined. |
1a42a214 |
17 | #define force_inline inline __attribute__((always_inline)) |
18 | |
6ef4987c |
19 | /* Calculate the offset needed to align the type */ |
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20 | static inline unsigned int ltt_align(size_t align_drift, |
6ef4987c |
21 | size_t size_of_type) |
22 | { |
23 | size_t alignment = min(sizeof(void*), size_of_type); |
24 | |
25 | return ((alignment - align_drift) & (alignment-1)); |
26 | } |
27 | |
28 | |
29 | /* TEMPLATE */ |
30 | |
31 | enum lttng_tasklet_priority { |
32 | LTTNG_LOW, |
33 | LTTNG_HIGH, |
34 | }; |
35 | |
36 | enum lttng_irq_mode { |
37 | LTTNG_user, |
38 | LTTNG_kernel, |
39 | }; |
40 | |
41 | struct lttng_mystruct2 { |
42 | unsigned int irq_id; |
43 | enum lttng_irq_mode mode; |
44 | //struct lttng_mystruct teststr1; |
45 | }; |
46 | |
47 | |
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48 | static inline size_t lttng_get_size_mystruct2( |
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49 | struct lttng_mystruct2 * obj) |
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50 | { |
51 | size_t size=0, locsize; |
52 | |
53 | locsize = sizeof(unsigned int); |
54 | size += ltt_align(size, locsize) + locsize; |
55 | |
56 | locsize = sizeof(enum lttng_irq_mode); |
57 | size += ltt_align(size, locsize) + locsize; |
58 | |
59 | BUG_ON(sizeof(struct lttng_mystruct2) != size); |
60 | |
61 | return sizeof(struct lttng_mystruct2); |
62 | } |
63 | |
e277c2f1 |
64 | static inline size_t lttng_get_alignment_mystruct2( |
6ef4987c |
65 | struct lttng_mystruct2 *obj) |
66 | { |
67 | size_t align=0, localign; |
68 | |
69 | localign = sizeof(unsigned int); |
70 | align = max(align, localign); |
71 | |
72 | localign = sizeof(enum lttng_irq_mode); |
73 | align = max(align, localign); |
74 | |
75 | return align; |
76 | } |
77 | |
e277c2f1 |
78 | static inline void lttng_write_mystruct2( |
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79 | void **to_base, |
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80 | size_t *to, |
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81 | void **from, |
82 | size_t *len, |
83 | struct lttng_mystruct2 *obj) |
84 | { |
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85 | size_t align, size; |
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86 | |
87 | align = lttng_get_alignment_mystruct2(obj); |
88 | size = lttng_get_size_mystruct2(obj); |
89 | |
90 | if(*len == 0) { |
1c341713 |
91 | *to += ltt_align(*to, align); /* align output */ |
6ef4987c |
92 | } else { |
1c341713 |
93 | *len += ltt_align(*to+*len, align); /* C alignment, ok to do a memcpy of it */ |
6ef4987c |
94 | } |
95 | |
96 | *len += size; |
97 | } |
98 | |
99 | |
100 | |
101 | #define LTTNG_ARRAY_SIZE_mystruct_myarray 10 |
102 | typedef uint64_t lttng_array_mystruct_myarray[LTTNG_ARRAY_SIZE_mystruct_myarray]; |
103 | |
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104 | static inline size_t lttng_get_size_array_mystruct_myarray( |
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105 | lttng_array_mystruct_myarray obj) |
106 | { |
107 | size_t size=0, locsize; |
108 | |
109 | locsize = sizeof(uint64_t); |
110 | /* ltt_align == 0 always*/ |
111 | //size += ltt_align(size, locsize) + (LTTNG_ARRAY_SIZE_mystruct_myarray * locsize); |
112 | BUG_ON(ltt_align(size, locsize) != 0); |
113 | size += LTTNG_ARRAY_SIZE_mystruct_myarray * locsize; |
114 | |
115 | BUG_ON(size != LTTNG_ARRAY_SIZE_mystruct_myarray * sizeof(uint64_t)); |
116 | |
117 | return size; |
118 | } |
119 | |
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120 | static inline size_t lttng_get_alignment_array_mystruct_myarray( |
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121 | lttng_array_mystruct_myarray obj) |
122 | { |
123 | size_t align=0, localign; |
124 | |
125 | localign = sizeof(uint64_t); |
126 | align = max(align, localign); |
127 | |
128 | return align; |
129 | } |
130 | |
131 | |
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132 | static inline void lttng_write_array_mystruct_myarray( |
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133 | void **to_base, |
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134 | size_t *to, |
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135 | void **from, |
136 | size_t *len, |
137 | lttng_array_mystruct_myarray obj) |
138 | { |
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139 | size_t align, size; |
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140 | |
141 | align = lttng_get_alignment_array_mystruct_myarray(obj); |
142 | size = lttng_get_size_array_mystruct_myarray(obj); |
143 | |
144 | if(*len == 0) { |
1c341713 |
145 | *to += ltt_align(*to, align); /* align output */ |
6ef4987c |
146 | } else { |
1c341713 |
147 | *len += ltt_align(*to+*len, align); /* C alignment, ok to do a memcpy of it */ |
6ef4987c |
148 | } |
149 | |
150 | *len += size; |
151 | } |
152 | |
153 | |
154 | typedef struct lttng_sequence_mystruct_mysequence lttng_sequence_mystruct_mysequence; |
155 | struct lttng_sequence_mystruct_mysequence { |
156 | unsigned int len; |
157 | double *array; |
158 | }; |
159 | |
160 | |
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161 | static inline size_t lttng_get_size_sequence_mystruct_mysequence( |
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162 | lttng_sequence_mystruct_mysequence *obj) |
163 | { |
164 | size_t size=0, locsize; |
165 | |
166 | locsize = sizeof(unsigned int); |
167 | size += ltt_align(size, locsize) + locsize; |
168 | |
169 | locsize = sizeof(double); |
170 | size += ltt_align(size, locsize) + (obj->len * locsize); |
171 | |
172 | return size; |
173 | } |
174 | |
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175 | static inline size_t lttng_get_alignment_sequence_mystruct_mysequence( |
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176 | lttng_sequence_mystruct_mysequence *obj) |
177 | { |
178 | size_t align=0, localign; |
179 | |
180 | localign = sizeof(unsigned int); |
181 | align = max(align, localign); |
182 | |
183 | localign = sizeof(double); |
184 | align = max(align, localign); |
185 | |
186 | return align; |
187 | } |
188 | |
189 | |
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190 | static inline void lttng_write_sequence_mystruct_mysequence( |
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191 | void **to_base, |
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192 | size_t *to, |
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193 | void **from, |
194 | size_t *len, |
195 | lttng_sequence_mystruct_mysequence *obj) |
196 | { |
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197 | size_t align; |
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198 | void *varfrom; |
199 | size_t varlen=0; |
200 | |
201 | /* Flush pending memcpy */ |
202 | if(*len != 0) { |
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203 | memcpy(*to_base+*to, *from, *len); |
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204 | *to += *len; |
205 | *len = 0; |
206 | } |
207 | |
208 | align = lttng_get_alignment_sequence_mystruct_mysequence(obj); |
209 | //no need size = lttng_get_size_sequence_mystruct_mysequence(obj); |
210 | |
211 | /* Align output */ |
1c341713 |
212 | *to += ltt_align(*to, align); /* *len = 0 in this function */ |
6ef4987c |
213 | |
214 | /* Copy members */ |
1c341713 |
215 | *to += ltt_align(*to, sizeof(unsigned int)); |
6ef4987c |
216 | varfrom = &obj->len; |
217 | varlen += sizeof(unsigned int); |
1c341713 |
218 | memcpy(*to_base+*to, varfrom, varlen); |
219 | *to += varlen; |
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220 | varlen = 0; |
221 | |
1c341713 |
222 | *to += ltt_align(*to, sizeof(double)); |
6ef4987c |
223 | varfrom = obj->array; |
224 | varlen += obj->len * sizeof(double); |
1c341713 |
225 | memcpy(*to_base+*to, varfrom, varlen); |
226 | *to += varlen; |
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227 | varlen = 0; |
228 | |
1c341713 |
229 | /* Realign the *to_base on arch size, set *to to 0 */ |
230 | *to = ltt_align(*to, sizeof(void *)); |
231 | *to_base = *to_base+*to; |
232 | *to = 0; |
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233 | |
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234 | /* Put source *from just after the C sequence */ |
235 | *from = obj+1; |
236 | } |
237 | |
238 | |
239 | |
240 | union lttng_mystruct_myunion { |
241 | double myfloat; |
242 | unsigned long myulong; |
243 | }; |
244 | |
245 | |
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246 | static inline size_t lttng_get_size_mystruct_myunion( |
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247 | union lttng_mystruct_myunion *obj) |
248 | { |
249 | size_t size=0, locsize; |
250 | |
251 | locsize = sizeof(double); |
252 | size = max(size, locsize); |
253 | |
254 | locsize = sizeof(unsigned long); |
255 | size = max(size, locsize); |
256 | |
257 | BUG_ON(size != sizeof(union lttng_mystruct_myunion)); |
258 | |
259 | return size; |
260 | } |
261 | |
262 | |
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263 | static inline size_t lttng_get_alignment_mystruct_myunion( |
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264 | union lttng_mystruct_myunion *obj) |
265 | { |
266 | size_t align=0, localign; |
267 | |
268 | localign = sizeof(double); |
269 | align = max(align, localign); |
270 | |
271 | localign = sizeof(unsigned long); |
272 | align = max(align, localign); |
273 | |
274 | return align; |
275 | } |
276 | |
277 | |
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278 | static inline void lttng_write_mystruct_myunion( |
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279 | void **to_base, |
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280 | size_t *to, |
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281 | void **from, |
282 | size_t *len, |
283 | union lttng_mystruct_myunion *obj) |
284 | { |
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285 | size_t align, size; |
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286 | |
287 | align = lttng_get_alignment_mystruct_myunion(obj); |
288 | size = lttng_get_size_mystruct_myunion(obj); |
289 | |
290 | if(*len == 0) { |
1c341713 |
291 | *to += ltt_align(*to, align); /* align output */ |
6ef4987c |
292 | } else { |
1c341713 |
293 | *len += ltt_align(*to+*len, align); /* C alignment, ok to do a memcpy of it */ |
6ef4987c |
294 | } |
295 | |
296 | *len += size; |
297 | } |
298 | |
299 | |
300 | struct lttng_mystruct { |
301 | unsigned int irq_id; |
302 | enum lttng_irq_mode mode; |
303 | struct lttng_mystruct2 teststr; |
304 | lttng_array_mystruct_myarray myarray; |
305 | lttng_sequence_mystruct_mysequence mysequence; |
306 | union lttng_mystruct_myunion myunion; |
307 | }; |
308 | |
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309 | static inline size_t lttng_get_size_mystruct( |
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310 | struct lttng_mystruct *obj) |
311 | { |
312 | size_t size=0, locsize, localign; |
313 | |
314 | locsize = sizeof(unsigned int); |
315 | size += ltt_align(size, locsize) + locsize; |
316 | |
317 | locsize = sizeof(enum lttng_irq_mode); |
318 | size += ltt_align(size, locsize) + locsize; |
319 | |
320 | localign = lttng_get_alignment_mystruct2(&obj->teststr); |
321 | locsize = lttng_get_size_mystruct2(&obj->teststr); |
322 | size += ltt_align(size, localign) + locsize; |
323 | |
324 | localign = lttng_get_alignment_array_mystruct_myarray(obj->myarray); |
325 | locsize = lttng_get_size_array_mystruct_myarray(obj->myarray); |
326 | size += ltt_align(size, localign) + locsize; |
327 | |
328 | localign = lttng_get_alignment_sequence_mystruct_mysequence(&obj->mysequence); |
329 | locsize = lttng_get_size_sequence_mystruct_mysequence(&obj->mysequence); |
330 | size += ltt_align(size, localign) + locsize; |
331 | |
332 | localign = lttng_get_alignment_mystruct_myunion(&obj->myunion); |
333 | locsize = lttng_get_size_mystruct_myunion(&obj->myunion); |
334 | size += ltt_align(size, localign) + locsize; |
335 | |
336 | return size; |
337 | } |
338 | |
339 | |
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340 | static inline size_t lttng_get_alignment_mystruct( |
6ef4987c |
341 | struct lttng_mystruct *obj) |
342 | { |
343 | size_t align=0, localign; |
344 | |
345 | localign = sizeof(unsigned int); |
346 | align = max(align, localign); |
347 | |
348 | localign = sizeof(enum lttng_irq_mode); |
349 | align = max(align, localign); |
350 | |
351 | localign = lttng_get_alignment_mystruct2(&obj->teststr); |
352 | align = max(align, localign); |
353 | |
354 | localign = lttng_get_alignment_array_mystruct_myarray(obj->myarray); |
355 | align = max(align, localign); |
356 | |
357 | localign = lttng_get_alignment_sequence_mystruct_mysequence(&obj->mysequence); |
358 | align = max(align, localign); |
359 | |
360 | localign = lttng_get_alignment_mystruct_myunion(&obj->myunion); |
361 | align = max(align, localign); |
362 | |
363 | return align; |
364 | } |
365 | |
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366 | static inline void lttng_write_mystruct( |
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367 | void **to_base, |
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368 | size_t *to, |
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369 | void **from, |
370 | size_t *len, |
371 | struct lttng_mystruct *obj) |
372 | { |
1c341713 |
373 | size_t align, size; |
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374 | |
375 | align = lttng_get_alignment_mystruct(obj); |
376 | // no need : contains variable size fields. |
377 | // locsize = lttng_get_size_mystruct(obj); |
378 | |
379 | if(*len == 0) { |
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380 | *to += ltt_align(*to, align); /* align output */ |
6ef4987c |
381 | } else { |
257d03bc |
382 | *len += ltt_align(*to+*len, align); /* C alignment, ok to do a memcpy of it */ |
6ef4987c |
383 | } |
384 | |
385 | /* Contains variable sized fields : must explode the structure */ |
386 | |
1c341713 |
387 | size = sizeof(unsigned int); |
388 | size += ltt_align(*to+*len, size) + size; |
389 | *len += size; |
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390 | |
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391 | size = sizeof(enum lttng_irq_mode); |
392 | size += ltt_align(*to+*len, size) + size; |
393 | *len += size; |
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394 | |
1c341713 |
395 | lttng_write_mystruct2(to_base, to, from, len, &obj->teststr); |
6ef4987c |
396 | |
1c341713 |
397 | lttng_write_array_mystruct_myarray(to_base, to, from, len, obj->myarray); |
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398 | |
399 | /* Variable length field */ |
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400 | lttng_write_sequence_mystruct_mysequence(to_base, to, from, len, &obj->mysequence); |
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401 | *to = 0; /* Force the compiler to know it's 0 */ |
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402 | /* After this previous write, we are sure that *to is 0, and *to_base is |
403 | * aligned on the architecture size : to rest of alignment will be calculated |
404 | * statically. */ |
405 | |
1c341713 |
406 | lttng_write_mystruct_myunion(to_base, to, from, len, &obj->myunion); |
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407 | |
408 | /* Don't forget to flush last write..... */ |
409 | } |
410 | |
411 | |
412 | |
413 | |
414 | |
415 | |
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416 | //void main() |
417 | void test() |
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418 | { |
419 | struct lttng_mystruct test; |
420 | test.mysequence.len = 20; |
421 | test.mysequence.array = malloc(20); |
422 | |
423 | size_t size = lttng_get_size_mystruct(&test); |
424 | size_t align = lttng_get_alignment_mystruct(&test); |
425 | |
426 | void *buf = malloc(align + size); |
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427 | void *to_base = buf; /* the buffer is allocated on arch_size alignment */ |
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428 | size_t to = 0; |
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429 | void *from = &test; |
430 | size_t len = 0; |
431 | |
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432 | lttng_write_mystruct(&to_base, &to, &from, &len, &test); |
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433 | /* Final flush */ |
434 | /* Flush pending memcpy */ |
435 | if(len != 0) { |
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436 | memcpy(to_base+to, from, len); |
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437 | to += len; |
438 | from += len; |
439 | len = 0; |
440 | } |
441 | |
442 | free(test.mysequence.array); |
443 | free(buf); |
444 | } |