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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> |
6ef4987c |
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 | |
5a9aecad |
16 | // Useful outside __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 */ |
e277c2f1 |
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 | |
e277c2f1 |
48 | static inline size_t lttng_get_size_mystruct2( |
257d03bc |
49 | struct lttng_mystruct2 * obj) |
6ef4987c |
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( |
1c341713 |
79 | void **to_base, |
257d03bc |
80 | size_t *to, |
6ef4987c |
81 | void **from, |
82 | size_t *len, |
83 | struct lttng_mystruct2 *obj) |
84 | { |
3e090fd3 |
85 | size_t align, size; |
6ef4987c |
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 | |
e277c2f1 |
104 | static inline size_t lttng_get_size_array_mystruct_myarray( |
6ef4987c |
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 | |
ae9eea8c |
115 | BUG_ON(sizeof(lttng_array_mystruct_myarray) != size); |
6ef4987c |
116 | |
ae9eea8c |
117 | return sizeof(lttng_array_mystruct_myarray); |
6ef4987c |
118 | } |
119 | |
e277c2f1 |
120 | static inline size_t lttng_get_alignment_array_mystruct_myarray( |
6ef4987c |
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 | |
e277c2f1 |
132 | static inline void lttng_write_array_mystruct_myarray( |
1c341713 |
133 | void **to_base, |
257d03bc |
134 | size_t *to, |
6ef4987c |
135 | void **from, |
136 | size_t *len, |
137 | lttng_array_mystruct_myarray obj) |
138 | { |
1c341713 |
139 | size_t align, size; |
6ef4987c |
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 | |
e277c2f1 |
161 | static inline size_t lttng_get_size_sequence_mystruct_mysequence( |
6ef4987c |
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 | |
5ec61509 |
172 | /* Realign on arch size */ |
173 | locsize = sizeof(void *); |
174 | size += ltt_align(size, locsize); |
175 | |
6ef4987c |
176 | return size; |
177 | } |
178 | |
e277c2f1 |
179 | static inline size_t lttng_get_alignment_sequence_mystruct_mysequence( |
6ef4987c |
180 | lttng_sequence_mystruct_mysequence *obj) |
181 | { |
182 | size_t align=0, localign; |
183 | |
184 | localign = sizeof(unsigned int); |
185 | align = max(align, localign); |
186 | |
187 | localign = sizeof(double); |
188 | align = max(align, localign); |
189 | |
190 | return align; |
191 | } |
192 | |
193 | |
e277c2f1 |
194 | static inline void lttng_write_sequence_mystruct_mysequence( |
1c341713 |
195 | void **to_base, |
257d03bc |
196 | size_t *to, |
6ef4987c |
197 | void **from, |
198 | size_t *len, |
199 | lttng_sequence_mystruct_mysequence *obj) |
200 | { |
257d03bc |
201 | size_t align; |
6ef4987c |
202 | void *varfrom; |
203 | size_t varlen=0; |
204 | |
205 | /* Flush pending memcpy */ |
206 | if(*len != 0) { |
1c341713 |
207 | memcpy(*to_base+*to, *from, *len); |
6ef4987c |
208 | *to += *len; |
209 | *len = 0; |
210 | } |
211 | |
212 | align = lttng_get_alignment_sequence_mystruct_mysequence(obj); |
213 | //no need size = lttng_get_size_sequence_mystruct_mysequence(obj); |
214 | |
215 | /* Align output */ |
1c341713 |
216 | *to += ltt_align(*to, align); /* *len = 0 in this function */ |
6ef4987c |
217 | |
218 | /* Copy members */ |
1c341713 |
219 | *to += ltt_align(*to, sizeof(unsigned int)); |
6ef4987c |
220 | varfrom = &obj->len; |
221 | varlen += sizeof(unsigned int); |
1c341713 |
222 | memcpy(*to_base+*to, varfrom, varlen); |
223 | *to += varlen; |
6ef4987c |
224 | varlen = 0; |
225 | |
1c341713 |
226 | *to += ltt_align(*to, sizeof(double)); |
6ef4987c |
227 | varfrom = obj->array; |
228 | varlen += obj->len * sizeof(double); |
1c341713 |
229 | memcpy(*to_base+*to, varfrom, varlen); |
230 | *to += varlen; |
6ef4987c |
231 | varlen = 0; |
232 | |
1c341713 |
233 | /* Realign the *to_base on arch size, set *to to 0 */ |
234 | *to = ltt_align(*to, sizeof(void *)); |
235 | *to_base = *to_base+*to; |
236 | *to = 0; |
a6cf4981 |
237 | |
6ef4987c |
238 | /* Put source *from just after the C sequence */ |
239 | *from = obj+1; |
240 | } |
241 | |
242 | |
243 | |
244 | union lttng_mystruct_myunion { |
245 | double myfloat; |
246 | unsigned long myulong; |
247 | }; |
248 | |
249 | |
e277c2f1 |
250 | static inline size_t lttng_get_size_mystruct_myunion( |
6ef4987c |
251 | union lttng_mystruct_myunion *obj) |
252 | { |
253 | size_t size=0, locsize; |
254 | |
255 | locsize = sizeof(double); |
256 | size = max(size, locsize); |
257 | |
258 | locsize = sizeof(unsigned long); |
259 | size = max(size, locsize); |
260 | |
261 | BUG_ON(size != sizeof(union lttng_mystruct_myunion)); |
262 | |
ae9eea8c |
263 | return sizeof(union lttng_mystruct_myunion); |
6ef4987c |
264 | } |
265 | |
266 | |
e277c2f1 |
267 | static inline size_t lttng_get_alignment_mystruct_myunion( |
6ef4987c |
268 | union lttng_mystruct_myunion *obj) |
269 | { |
270 | size_t align=0, localign; |
271 | |
272 | localign = sizeof(double); |
273 | align = max(align, localign); |
274 | |
275 | localign = sizeof(unsigned long); |
276 | align = max(align, localign); |
277 | |
278 | return align; |
279 | } |
280 | |
281 | |
e277c2f1 |
282 | static inline void lttng_write_mystruct_myunion( |
1c341713 |
283 | void **to_base, |
257d03bc |
284 | size_t *to, |
6ef4987c |
285 | void **from, |
286 | size_t *len, |
287 | union lttng_mystruct_myunion *obj) |
288 | { |
1c341713 |
289 | size_t align, size; |
6ef4987c |
290 | |
291 | align = lttng_get_alignment_mystruct_myunion(obj); |
292 | size = lttng_get_size_mystruct_myunion(obj); |
293 | |
294 | if(*len == 0) { |
1c341713 |
295 | *to += ltt_align(*to, align); /* align output */ |
6ef4987c |
296 | } else { |
1c341713 |
297 | *len += ltt_align(*to+*len, align); /* C alignment, ok to do a memcpy of it */ |
6ef4987c |
298 | } |
299 | |
300 | *len += size; |
301 | } |
302 | |
303 | |
304 | struct lttng_mystruct { |
305 | unsigned int irq_id; |
306 | enum lttng_irq_mode mode; |
307 | struct lttng_mystruct2 teststr; |
308 | lttng_array_mystruct_myarray myarray; |
309 | lttng_sequence_mystruct_mysequence mysequence; |
310 | union lttng_mystruct_myunion myunion; |
311 | }; |
312 | |
e277c2f1 |
313 | static inline size_t lttng_get_size_mystruct( |
6ef4987c |
314 | struct lttng_mystruct *obj) |
315 | { |
316 | size_t size=0, locsize, localign; |
317 | |
318 | locsize = sizeof(unsigned int); |
319 | size += ltt_align(size, locsize) + locsize; |
320 | |
321 | locsize = sizeof(enum lttng_irq_mode); |
322 | size += ltt_align(size, locsize) + locsize; |
323 | |
324 | localign = lttng_get_alignment_mystruct2(&obj->teststr); |
325 | locsize = lttng_get_size_mystruct2(&obj->teststr); |
326 | size += ltt_align(size, localign) + locsize; |
327 | |
328 | localign = lttng_get_alignment_array_mystruct_myarray(obj->myarray); |
329 | locsize = lttng_get_size_array_mystruct_myarray(obj->myarray); |
330 | size += ltt_align(size, localign) + locsize; |
331 | |
332 | localign = lttng_get_alignment_sequence_mystruct_mysequence(&obj->mysequence); |
333 | locsize = lttng_get_size_sequence_mystruct_mysequence(&obj->mysequence); |
334 | size += ltt_align(size, localign) + locsize; |
335 | |
336 | localign = lttng_get_alignment_mystruct_myunion(&obj->myunion); |
337 | locsize = lttng_get_size_mystruct_myunion(&obj->myunion); |
338 | size += ltt_align(size, localign) + locsize; |
339 | |
340 | return size; |
341 | } |
342 | |
343 | |
e277c2f1 |
344 | static inline size_t lttng_get_alignment_mystruct( |
6ef4987c |
345 | struct lttng_mystruct *obj) |
346 | { |
347 | size_t align=0, localign; |
348 | |
349 | localign = sizeof(unsigned int); |
350 | align = max(align, localign); |
351 | |
352 | localign = sizeof(enum lttng_irq_mode); |
353 | align = max(align, localign); |
354 | |
355 | localign = lttng_get_alignment_mystruct2(&obj->teststr); |
356 | align = max(align, localign); |
357 | |
358 | localign = lttng_get_alignment_array_mystruct_myarray(obj->myarray); |
359 | align = max(align, localign); |
360 | |
361 | localign = lttng_get_alignment_sequence_mystruct_mysequence(&obj->mysequence); |
362 | align = max(align, localign); |
363 | |
364 | localign = lttng_get_alignment_mystruct_myunion(&obj->myunion); |
365 | align = max(align, localign); |
366 | |
367 | return align; |
368 | } |
369 | |
e277c2f1 |
370 | static inline void lttng_write_mystruct( |
1c341713 |
371 | void **to_base, |
257d03bc |
372 | size_t *to, |
6ef4987c |
373 | void **from, |
374 | size_t *len, |
375 | struct lttng_mystruct *obj) |
376 | { |
1c341713 |
377 | size_t align, size; |
6ef4987c |
378 | |
379 | align = lttng_get_alignment_mystruct(obj); |
380 | // no need : contains variable size fields. |
381 | // locsize = lttng_get_size_mystruct(obj); |
382 | |
383 | if(*len == 0) { |
257d03bc |
384 | *to += ltt_align(*to, align); /* align output */ |
6ef4987c |
385 | } else { |
257d03bc |
386 | *len += ltt_align(*to+*len, align); /* C alignment, ok to do a memcpy of it */ |
6ef4987c |
387 | } |
388 | |
389 | /* Contains variable sized fields : must explode the structure */ |
390 | |
1c341713 |
391 | size = sizeof(unsigned int); |
392 | size += ltt_align(*to+*len, size) + size; |
393 | *len += size; |
6ef4987c |
394 | |
1c341713 |
395 | size = sizeof(enum lttng_irq_mode); |
396 | size += ltt_align(*to+*len, size) + size; |
397 | *len += size; |
6ef4987c |
398 | |
1c341713 |
399 | lttng_write_mystruct2(to_base, to, from, len, &obj->teststr); |
6ef4987c |
400 | |
1c341713 |
401 | lttng_write_array_mystruct_myarray(to_base, to, from, len, obj->myarray); |
6ef4987c |
402 | |
403 | /* Variable length field */ |
1c341713 |
404 | lttng_write_sequence_mystruct_mysequence(to_base, to, from, len, &obj->mysequence); |
53f58ee1 |
405 | //*to = 0; /* Force the compiler to know it's 0 */ |
1c341713 |
406 | /* After this previous write, we are sure that *to is 0, and *to_base is |
407 | * aligned on the architecture size : to rest of alignment will be calculated |
408 | * statically. */ |
409 | |
1c341713 |
410 | lttng_write_mystruct_myunion(to_base, to, from, len, &obj->myunion); |
6ef4987c |
411 | |
412 | /* Don't forget to flush last write..... */ |
413 | } |
414 | |
415 | |
416 | |
417 | |
418 | |
419 | |
257d03bc |
420 | //void main() |
421 | void test() |
6ef4987c |
422 | { |
423 | struct lttng_mystruct test; |
424 | test.mysequence.len = 20; |
425 | test.mysequence.array = malloc(20); |
426 | |
427 | size_t size = lttng_get_size_mystruct(&test); |
428 | size_t align = lttng_get_alignment_mystruct(&test); |
429 | |
430 | void *buf = malloc(align + size); |
1c341713 |
431 | void *to_base = buf; /* the buffer is allocated on arch_size alignment */ |
257d03bc |
432 | size_t to = 0; |
6ef4987c |
433 | void *from = &test; |
434 | size_t len = 0; |
435 | |
1c341713 |
436 | lttng_write_mystruct(&to_base, &to, &from, &len, &test); |
6ef4987c |
437 | /* Final flush */ |
438 | /* Flush pending memcpy */ |
439 | if(len != 0) { |
1c341713 |
440 | memcpy(to_base+to, from, len); |
6ef4987c |
441 | to += len; |
442 | from += len; |
443 | len = 0; |
444 | } |
445 | |
446 | free(test.mysequence.array); |
447 | free(buf); |
448 | } |