Commit | Line | Data |
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5cd6d0e5 | 1 | /* |
0235b0db | 2 | * SPDX-License-Identifier: MIT |
5cd6d0e5 PP |
3 | * |
4 | * Copyright (c) 2015-2016 EfficiOS Inc. and Linux Foundation | |
5 | * Copyright (c) 2015-2016 Philippe Proulx <pproulx@efficios.com> | |
6 | * | |
0235b0db | 7 | * Babeltrace - CTF binary field class reader (BFCR) |
5cd6d0e5 PP |
8 | */ |
9 | ||
c4a714d2 | 10 | #define BT_COMP_LOG_SELF_COMP (bfcr->self_comp) |
80870e64 | 11 | #define BT_LOG_OUTPUT_LEVEL (bfcr->log_level) |
350ad6c1 | 12 | #define BT_LOG_TAG "PLUGIN/CTF/BFCR" |
d9c39b0a | 13 | #include "logging/comp-logging.h" |
5cd6d0e5 PP |
14 | |
15 | #include <stdlib.h> | |
16 | #include <stdint.h> | |
17 | #include <inttypes.h> | |
18 | #include <stdio.h> | |
19 | #include <stddef.h> | |
20 | #include <stdbool.h> | |
578e048b | 21 | #include "common/assert.h" |
5cd6d0e5 | 22 | #include <string.h> |
578e048b MJ |
23 | #include "compat/bitfield.h" |
24 | #include "common/common.h" | |
3fadfbc0 | 25 | #include <babeltrace2/babeltrace.h> |
578e048b | 26 | #include "common/align.h" |
5cd6d0e5 PP |
27 | #include <glib.h> |
28 | ||
087cd0f5 SM |
29 | #include "bfcr.hpp" |
30 | #include "../metadata/ctf-meta.hpp" | |
5cd6d0e5 PP |
31 | |
32 | #define DIV8(_x) ((_x) >> 3) | |
33 | #define BYTES_TO_BITS(_x) ((_x) * 8) | |
34 | #define BITS_TO_BYTES_FLOOR(_x) DIV8(_x) | |
35 | #define BITS_TO_BYTES_CEIL(_x) DIV8((_x) + 7) | |
36 | #define IN_BYTE_OFFSET(_at) ((_at) & 7) | |
37 | ||
38 | /* A visit stack entry */ | |
39 | struct stack_entry { | |
40 | /* | |
41 | * Current class of base field, one of: | |
42 | * | |
43 | * * Structure | |
44 | * * Array | |
45 | * * Sequence | |
46 | * * Variant | |
47 | */ | |
48 | struct ctf_field_class *base_class; | |
49 | ||
50 | /* Length of base field (always 1 for a variant class) */ | |
51 | int64_t base_len; | |
52 | ||
53 | /* Index of next field to read */ | |
54 | int64_t index; | |
55 | }; | |
56 | ||
80870e64 PP |
57 | struct bt_bfcr; |
58 | ||
5cd6d0e5 PP |
59 | /* Visit stack */ |
60 | struct stack { | |
80870e64 PP |
61 | struct bt_bfcr *bfcr; |
62 | ||
5cd6d0e5 PP |
63 | /* Entries (struct stack_entry) */ |
64 | GArray *entries; | |
65 | ||
66 | /* Number of active entries */ | |
67 | size_t size; | |
68 | }; | |
69 | ||
70 | /* Reading states */ | |
71 | enum bfcr_state { | |
72 | BFCR_STATE_NEXT_FIELD, | |
73 | BFCR_STATE_ALIGN_BASIC, | |
74 | BFCR_STATE_ALIGN_COMPOUND, | |
75 | BFCR_STATE_READ_BASIC_BEGIN, | |
76 | BFCR_STATE_READ_BASIC_CONTINUE, | |
77 | BFCR_STATE_DONE, | |
78 | }; | |
79 | ||
80 | /* Binary class reader */ | |
81 | struct bt_bfcr { | |
80870e64 PP |
82 | bt_logging_level log_level; |
83 | ||
c4a714d2 PP |
84 | /* Weak */ |
85 | bt_self_component *self_comp; | |
86 | ||
80870e64 | 87 | /* BFCR stack */ |
5cd6d0e5 PP |
88 | struct stack *stack; |
89 | ||
90 | /* Current basic field class */ | |
91 | struct ctf_field_class *cur_basic_field_class; | |
92 | ||
93 | /* Current state */ | |
94 | enum bfcr_state state; | |
95 | ||
96 | /* | |
97 | * Last basic field class's byte order. | |
98 | * | |
99 | * This is used to detect errors since two contiguous basic | |
100 | * classes for which the common boundary is not the boundary of | |
101 | * a byte cannot have different byte orders. | |
102 | * | |
e2bd7d40 JR |
103 | * This is set to CTF_BYTE_ORDER_UNKNOWN on reset and when the last |
104 | * basic field class was a string class. | |
5cd6d0e5 PP |
105 | */ |
106 | enum ctf_byte_order last_bo; | |
107 | ||
108 | /* Current byte order (copied to last_bo after a successful read) */ | |
109 | enum ctf_byte_order cur_bo; | |
110 | ||
111 | /* Stitch buffer infos */ | |
112 | struct { | |
113 | /* Stitch buffer */ | |
114 | uint8_t buf[16]; | |
115 | ||
116 | /* Offset, within stitch buffer, of first bit */ | |
117 | size_t offset; | |
118 | ||
119 | /* Length (bits) of data in stitch buffer from offset */ | |
120 | size_t at; | |
121 | } stitch; | |
122 | ||
123 | /* User buffer infos */ | |
124 | struct { | |
125 | /* Address */ | |
126 | const uint8_t *addr; | |
127 | ||
128 | /* Offset of data from address (bits) */ | |
129 | size_t offset; | |
130 | ||
131 | /* Current position from offset (bits) */ | |
132 | size_t at; | |
133 | ||
134 | /* Offset of offset within whole packet (bits) */ | |
135 | size_t packet_offset; | |
136 | ||
137 | /* Data size in buffer (bits) */ | |
138 | size_t sz; | |
139 | ||
140 | /* Buffer size (bytes) */ | |
141 | size_t buf_sz; | |
142 | } buf; | |
143 | ||
144 | /* User stuff */ | |
145 | struct { | |
146 | /* Callback functions */ | |
147 | struct bt_bfcr_cbs cbs; | |
148 | ||
149 | /* Private data */ | |
150 | void *data; | |
151 | } user; | |
152 | }; | |
153 | ||
154 | static inline | |
155 | const char *bfcr_state_string(enum bfcr_state state) | |
156 | { | |
157 | switch (state) { | |
158 | case BFCR_STATE_NEXT_FIELD: | |
8a432889 | 159 | return "NEXT_FIELD"; |
5cd6d0e5 | 160 | case BFCR_STATE_ALIGN_BASIC: |
8a432889 | 161 | return "ALIGN_BASIC"; |
5cd6d0e5 | 162 | case BFCR_STATE_ALIGN_COMPOUND: |
8a432889 | 163 | return "ALIGN_COMPOUND"; |
5cd6d0e5 | 164 | case BFCR_STATE_READ_BASIC_BEGIN: |
8a432889 | 165 | return "READ_BASIC_BEGIN"; |
5cd6d0e5 | 166 | case BFCR_STATE_READ_BASIC_CONTINUE: |
8a432889 | 167 | return "READ_BASIC_CONTINUE"; |
5cd6d0e5 | 168 | case BFCR_STATE_DONE: |
8a432889 | 169 | return "DONE"; |
5cd6d0e5 | 170 | } |
00dff0ec SM |
171 | |
172 | bt_common_abort(); | |
5cd6d0e5 PP |
173 | } |
174 | ||
175 | static | |
80870e64 | 176 | struct stack *stack_new(struct bt_bfcr *bfcr) |
5cd6d0e5 PP |
177 | { |
178 | struct stack *stack = NULL; | |
179 | ||
180 | stack = g_new0(struct stack, 1); | |
181 | if (!stack) { | |
c4a714d2 | 182 | BT_COMP_LOGE_STR("Failed to allocate one stack."); |
5cd6d0e5 PP |
183 | goto error; |
184 | } | |
185 | ||
80870e64 | 186 | stack->bfcr = bfcr; |
5cd6d0e5 PP |
187 | stack->entries = g_array_new(FALSE, TRUE, sizeof(struct stack_entry)); |
188 | if (!stack->entries) { | |
c4a714d2 | 189 | BT_COMP_LOGE_STR("Failed to allocate a GArray."); |
5cd6d0e5 PP |
190 | goto error; |
191 | } | |
192 | ||
c4a714d2 | 193 | BT_COMP_LOGD("Created stack: addr=%p", stack); |
5cd6d0e5 PP |
194 | return stack; |
195 | ||
196 | error: | |
197 | g_free(stack); | |
198 | return NULL; | |
199 | } | |
200 | ||
201 | static | |
202 | void stack_destroy(struct stack *stack) | |
203 | { | |
80870e64 PP |
204 | struct bt_bfcr *bfcr; |
205 | ||
5cd6d0e5 PP |
206 | if (!stack) { |
207 | return; | |
208 | } | |
209 | ||
80870e64 | 210 | bfcr = stack->bfcr; |
c4a714d2 | 211 | BT_COMP_LOGD("Destroying stack: addr=%p", stack); |
5cd6d0e5 PP |
212 | |
213 | if (stack->entries) { | |
214 | g_array_free(stack->entries, TRUE); | |
215 | } | |
216 | ||
217 | g_free(stack); | |
218 | } | |
219 | ||
220 | static | |
221 | int stack_push(struct stack *stack, struct ctf_field_class *base_class, | |
222 | size_t base_len) | |
223 | { | |
224 | struct stack_entry *entry; | |
80870e64 | 225 | struct bt_bfcr *bfcr; |
5cd6d0e5 | 226 | |
98b15851 PP |
227 | BT_ASSERT_DBG(stack); |
228 | BT_ASSERT_DBG(base_class); | |
80870e64 | 229 | bfcr = stack->bfcr; |
ef267d12 | 230 | BT_COMP_LOGT("Pushing field class on stack: stack-addr=%p, " |
864cad70 | 231 | "fc-addr=%p, fc-type=%d, base-length=%zu, " |
5cd6d0e5 | 232 | "stack-size-before=%zu, stack-size-after=%zu", |
864cad70 | 233 | stack, base_class, base_class->type, |
5cd6d0e5 PP |
234 | base_len, stack->size, stack->size + 1); |
235 | ||
236 | if (stack->entries->len == stack->size) { | |
237 | g_array_set_size(stack->entries, stack->size + 1); | |
238 | } | |
239 | ||
240 | entry = &g_array_index(stack->entries, struct stack_entry, stack->size); | |
241 | entry->base_class = base_class; | |
242 | entry->base_len = base_len; | |
243 | entry->index = 0; | |
244 | stack->size++; | |
245 | return 0; | |
246 | } | |
247 | ||
248 | static inline | |
249 | int64_t get_compound_field_class_length(struct bt_bfcr *bfcr, | |
250 | struct ctf_field_class *fc) | |
251 | { | |
252 | int64_t length; | |
253 | ||
864cad70 PP |
254 | switch (fc->type) { |
255 | case CTF_FIELD_CLASS_TYPE_STRUCT: | |
5cd6d0e5 | 256 | { |
087cd0f5 | 257 | ctf_field_class_struct *struct_fc = ctf_field_class_as_struct(fc); |
5cd6d0e5 PP |
258 | |
259 | length = (int64_t) struct_fc->members->len; | |
260 | break; | |
261 | } | |
864cad70 | 262 | case CTF_FIELD_CLASS_TYPE_VARIANT: |
5cd6d0e5 PP |
263 | { |
264 | /* Variant field classes always "contain" a single class */ | |
265 | length = 1; | |
266 | break; | |
267 | } | |
864cad70 | 268 | case CTF_FIELD_CLASS_TYPE_ARRAY: |
5cd6d0e5 | 269 | { |
087cd0f5 | 270 | struct ctf_field_class_array *array_fc = ctf_field_class_as_array(fc); |
5cd6d0e5 PP |
271 | |
272 | length = (int64_t) array_fc->length; | |
273 | break; | |
274 | } | |
864cad70 | 275 | case CTF_FIELD_CLASS_TYPE_SEQUENCE: |
5cd6d0e5 PP |
276 | length = bfcr->user.cbs.query.get_sequence_length(fc, |
277 | bfcr->user.data); | |
278 | break; | |
279 | default: | |
498e7994 | 280 | bt_common_abort(); |
5cd6d0e5 PP |
281 | } |
282 | ||
283 | return length; | |
284 | } | |
285 | ||
286 | static | |
287 | int stack_push_with_len(struct bt_bfcr *bfcr, struct ctf_field_class *base_class) | |
288 | { | |
289 | int ret; | |
290 | int64_t length = get_compound_field_class_length(bfcr, base_class); | |
291 | ||
292 | if (length < 0) { | |
c4a714d2 | 293 | BT_COMP_LOGW("Cannot get compound field class's field count: " |
864cad70 PP |
294 | "bfcr-addr=%p, fc-addr=%p, fc-type=%d", |
295 | bfcr, base_class, base_class->type); | |
5cd6d0e5 PP |
296 | ret = BT_BFCR_STATUS_ERROR; |
297 | goto end; | |
298 | } | |
299 | ||
300 | ret = stack_push(bfcr->stack, base_class, (size_t) length); | |
301 | ||
302 | end: | |
303 | return ret; | |
304 | } | |
305 | ||
306 | static inline | |
307 | unsigned int stack_size(struct stack *stack) | |
308 | { | |
98b15851 | 309 | BT_ASSERT_DBG(stack); |
5cd6d0e5 PP |
310 | return stack->size; |
311 | } | |
312 | ||
313 | static | |
314 | void stack_pop(struct stack *stack) | |
315 | { | |
80870e64 PP |
316 | struct bt_bfcr *bfcr; |
317 | ||
98b15851 PP |
318 | BT_ASSERT_DBG(stack); |
319 | BT_ASSERT_DBG(stack_size(stack)); | |
80870e64 | 320 | bfcr = stack->bfcr; |
ef267d12 | 321 | BT_COMP_LOGT("Popping from stack: " |
5cd6d0e5 PP |
322 | "stack-addr=%p, stack-size-before=%u, stack-size-after=%u", |
323 | stack, stack->entries->len, stack->entries->len - 1); | |
324 | stack->size--; | |
325 | } | |
326 | ||
327 | static inline | |
328 | bool stack_empty(struct stack *stack) | |
329 | { | |
330 | return stack_size(stack) == 0; | |
331 | } | |
332 | ||
333 | static | |
334 | void stack_clear(struct stack *stack) | |
335 | { | |
98b15851 | 336 | BT_ASSERT_DBG(stack); |
5cd6d0e5 PP |
337 | stack->size = 0; |
338 | } | |
339 | ||
340 | static inline | |
341 | struct stack_entry *stack_top(struct stack *stack) | |
342 | { | |
98b15851 PP |
343 | BT_ASSERT_DBG(stack); |
344 | BT_ASSERT_DBG(stack_size(stack)); | |
5cd6d0e5 PP |
345 | return &g_array_index(stack->entries, struct stack_entry, |
346 | stack->size - 1); | |
347 | } | |
348 | ||
349 | static inline | |
350 | size_t available_bits(struct bt_bfcr *bfcr) | |
351 | { | |
352 | return bfcr->buf.sz - bfcr->buf.at; | |
353 | } | |
354 | ||
355 | static inline | |
356 | void consume_bits(struct bt_bfcr *bfcr, size_t incr) | |
357 | { | |
ef267d12 | 358 | BT_COMP_LOGT("Advancing cursor: bfcr-addr=%p, cur-before=%zu, cur-after=%zu", |
5cd6d0e5 PP |
359 | bfcr, bfcr->buf.at, bfcr->buf.at + incr); |
360 | bfcr->buf.at += incr; | |
361 | } | |
362 | ||
363 | static inline | |
364 | bool has_enough_bits(struct bt_bfcr *bfcr, size_t sz) | |
365 | { | |
366 | return available_bits(bfcr) >= sz; | |
367 | } | |
368 | ||
369 | static inline | |
370 | bool at_least_one_bit_left(struct bt_bfcr *bfcr) | |
371 | { | |
372 | return has_enough_bits(bfcr, 1); | |
373 | } | |
374 | ||
375 | static inline | |
376 | size_t packet_at(struct bt_bfcr *bfcr) | |
377 | { | |
378 | return bfcr->buf.packet_offset + bfcr->buf.at; | |
379 | } | |
380 | ||
381 | static inline | |
382 | size_t buf_at_from_addr(struct bt_bfcr *bfcr) | |
383 | { | |
384 | /* | |
385 | * Considering this: | |
386 | * | |
387 | * ====== offset ===== (17) | |
388 | * | |
389 | * xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx | |
390 | * ^ | |
391 | * addr (0) ==== at ==== (12) | |
392 | * | |
393 | * We want this: | |
394 | * | |
395 | * =============================== (29) | |
396 | */ | |
397 | return bfcr->buf.offset + bfcr->buf.at; | |
398 | } | |
399 | ||
400 | static | |
401 | void stitch_reset(struct bt_bfcr *bfcr) | |
402 | { | |
403 | bfcr->stitch.offset = 0; | |
404 | bfcr->stitch.at = 0; | |
405 | } | |
406 | ||
407 | static inline | |
408 | size_t stitch_at_from_addr(struct bt_bfcr *bfcr) | |
409 | { | |
410 | return bfcr->stitch.offset + bfcr->stitch.at; | |
411 | } | |
412 | ||
413 | static | |
414 | void stitch_append_from_buf(struct bt_bfcr *bfcr, size_t sz) | |
415 | { | |
416 | size_t stitch_byte_at; | |
417 | size_t buf_byte_at; | |
418 | size_t nb_bytes; | |
419 | ||
420 | if (sz == 0) { | |
421 | return; | |
422 | } | |
423 | ||
424 | stitch_byte_at = | |
425 | BITS_TO_BYTES_FLOOR(stitch_at_from_addr(bfcr)); | |
426 | buf_byte_at = BITS_TO_BYTES_FLOOR(buf_at_from_addr(bfcr)); | |
427 | nb_bytes = BITS_TO_BYTES_CEIL(sz); | |
428 | BT_ASSERT(nb_bytes > 0); | |
429 | BT_ASSERT(bfcr->buf.addr); | |
430 | memcpy(&bfcr->stitch.buf[stitch_byte_at], &bfcr->buf.addr[buf_byte_at], | |
431 | nb_bytes); | |
432 | bfcr->stitch.at += sz; | |
433 | consume_bits(bfcr, sz); | |
434 | } | |
435 | ||
436 | static | |
437 | void stitch_append_from_remaining_buf(struct bt_bfcr *bfcr) | |
438 | { | |
439 | stitch_append_from_buf(bfcr, available_bits(bfcr)); | |
440 | } | |
441 | ||
442 | static | |
443 | void stitch_set_from_remaining_buf(struct bt_bfcr *bfcr) | |
444 | { | |
445 | stitch_reset(bfcr); | |
446 | bfcr->stitch.offset = IN_BYTE_OFFSET(buf_at_from_addr(bfcr)); | |
447 | stitch_append_from_remaining_buf(bfcr); | |
448 | } | |
449 | ||
450 | static inline | |
80870e64 | 451 | void read_unsigned_bitfield(struct bt_bfcr *bfcr, const uint8_t *buf, size_t at, |
5cd6d0e5 PP |
452 | unsigned int field_size, enum ctf_byte_order bo, |
453 | uint64_t *v) | |
454 | { | |
455 | switch (bo) { | |
456 | case CTF_BYTE_ORDER_BIG: | |
457 | bt_bitfield_read_be(buf, uint8_t, at, field_size, v); | |
458 | break; | |
459 | case CTF_BYTE_ORDER_LITTLE: | |
460 | bt_bitfield_read_le(buf, uint8_t, at, field_size, v); | |
461 | break; | |
462 | default: | |
498e7994 | 463 | bt_common_abort(); |
5cd6d0e5 PP |
464 | } |
465 | ||
ef267d12 | 466 | BT_COMP_LOGT("Read unsigned bit array: cur=%zu, size=%u, " |
5cd6d0e5 PP |
467 | "bo=%d, val=%" PRIu64, at, field_size, bo, *v); |
468 | } | |
469 | ||
470 | static inline | |
80870e64 | 471 | void read_signed_bitfield(struct bt_bfcr *bfcr, const uint8_t *buf, size_t at, |
5cd6d0e5 PP |
472 | unsigned int field_size, enum ctf_byte_order bo, int64_t *v) |
473 | { | |
474 | switch (bo) { | |
475 | case CTF_BYTE_ORDER_BIG: | |
476 | bt_bitfield_read_be(buf, uint8_t, at, field_size, v); | |
477 | break; | |
478 | case CTF_BYTE_ORDER_LITTLE: | |
479 | bt_bitfield_read_le(buf, uint8_t, at, field_size, v); | |
480 | break; | |
481 | default: | |
498e7994 | 482 | bt_common_abort(); |
5cd6d0e5 PP |
483 | } |
484 | ||
ef267d12 | 485 | BT_COMP_LOGT("Read signed bit array: cur=%zu, size=%u, " |
5cd6d0e5 PP |
486 | "bo=%d, val=%" PRId64, at, field_size, bo, *v); |
487 | } | |
488 | ||
489 | typedef enum bt_bfcr_status (* read_basic_and_call_cb_t)(struct bt_bfcr *, | |
490 | const uint8_t *, size_t); | |
491 | ||
492 | static inline | |
493 | enum bt_bfcr_status validate_contiguous_bo(struct bt_bfcr *bfcr, | |
494 | enum ctf_byte_order next_bo) | |
495 | { | |
496 | enum bt_bfcr_status status = BT_BFCR_STATUS_OK; | |
497 | ||
498 | /* Always valid when at a byte boundary */ | |
499 | if (packet_at(bfcr) % 8 == 0) { | |
500 | goto end; | |
501 | } | |
502 | ||
503 | /* Always valid if last byte order is unknown */ | |
e2bd7d40 | 504 | if (bfcr->last_bo == CTF_BYTE_ORDER_UNKNOWN) { |
5cd6d0e5 PP |
505 | goto end; |
506 | } | |
507 | ||
508 | /* Always valid if next byte order is unknown */ | |
e2bd7d40 | 509 | if (next_bo == CTF_BYTE_ORDER_UNKNOWN) { |
5cd6d0e5 PP |
510 | goto end; |
511 | } | |
512 | ||
513 | /* Make sure last byte order is compatible with the next byte order */ | |
514 | switch (bfcr->last_bo) { | |
515 | case CTF_BYTE_ORDER_BIG: | |
516 | if (next_bo != CTF_BYTE_ORDER_BIG) { | |
517 | status = BT_BFCR_STATUS_ERROR; | |
518 | } | |
519 | break; | |
520 | case CTF_BYTE_ORDER_LITTLE: | |
521 | if (next_bo != CTF_BYTE_ORDER_LITTLE) { | |
522 | status = BT_BFCR_STATUS_ERROR; | |
523 | } | |
524 | break; | |
525 | default: | |
526 | status = BT_BFCR_STATUS_ERROR; | |
527 | } | |
528 | ||
529 | end: | |
530 | if (status < 0) { | |
c4a714d2 | 531 | BT_COMP_LOGW("Cannot read bit array: two different byte orders not at a byte boundary: " |
5cd6d0e5 PP |
532 | "bfcr-addr=%p, last-bo=%d, next-bo=%d", |
533 | bfcr, bfcr->last_bo, next_bo); | |
534 | } | |
535 | ||
536 | return status; | |
537 | } | |
538 | ||
539 | static | |
540 | enum bt_bfcr_status read_basic_float_and_call_cb(struct bt_bfcr *bfcr, | |
541 | const uint8_t *buf, size_t at) | |
542 | { | |
543 | double dblval; | |
544 | unsigned int field_size; | |
545 | enum ctf_byte_order bo; | |
546 | enum bt_bfcr_status status = BT_BFCR_STATUS_OK; | |
087cd0f5 | 547 | ctf_field_class_float *fc = ctf_field_class_as_float(bfcr->cur_basic_field_class); |
5cd6d0e5 | 548 | |
98b15851 | 549 | BT_ASSERT_DBG(fc); |
5cd6d0e5 PP |
550 | field_size = fc->base.size; |
551 | bo = fc->base.byte_order; | |
552 | bfcr->cur_bo = bo; | |
553 | ||
554 | switch (field_size) { | |
555 | case 32: | |
556 | { | |
557 | uint64_t v; | |
558 | union { | |
559 | uint32_t u; | |
560 | float f; | |
561 | } f32; | |
562 | ||
80870e64 | 563 | read_unsigned_bitfield(bfcr, buf, at, field_size, bo, &v); |
5cd6d0e5 PP |
564 | f32.u = (uint32_t) v; |
565 | dblval = (double) f32.f; | |
566 | break; | |
567 | } | |
568 | case 64: | |
569 | { | |
570 | union { | |
571 | uint64_t u; | |
572 | double d; | |
573 | } f64; | |
574 | ||
80870e64 | 575 | read_unsigned_bitfield(bfcr, buf, at, field_size, bo, &f64.u); |
5cd6d0e5 PP |
576 | dblval = f64.d; |
577 | break; | |
578 | } | |
579 | default: | |
580 | /* Only 32-bit and 64-bit fields are supported currently */ | |
498e7994 | 581 | bt_common_abort(); |
5cd6d0e5 PP |
582 | } |
583 | ||
ef267d12 | 584 | BT_COMP_LOGT("Read floating point number value: bfcr=%p, cur=%zu, val=%f", |
5cd6d0e5 PP |
585 | bfcr, at, dblval); |
586 | ||
587 | if (bfcr->user.cbs.classes.floating_point) { | |
ef267d12 | 588 | BT_COMP_LOGT("Calling user function (floating point number)."); |
5cd6d0e5 PP |
589 | status = bfcr->user.cbs.classes.floating_point(dblval, |
590 | bfcr->cur_basic_field_class, bfcr->user.data); | |
ef267d12 | 591 | BT_COMP_LOGT("User function returned: status=%s", |
5cd6d0e5 PP |
592 | bt_bfcr_status_string(status)); |
593 | if (status != BT_BFCR_STATUS_OK) { | |
c4a714d2 | 594 | BT_COMP_LOGW("User function failed: bfcr-addr=%p, status=%s", |
5cd6d0e5 PP |
595 | bfcr, bt_bfcr_status_string(status)); |
596 | } | |
597 | } | |
598 | ||
599 | return status; | |
600 | } | |
601 | ||
602 | static inline | |
603 | enum bt_bfcr_status read_basic_int_and_call_cb(struct bt_bfcr *bfcr, | |
604 | const uint8_t *buf, size_t at) | |
605 | { | |
606 | unsigned int field_size; | |
607 | enum ctf_byte_order bo; | |
608 | enum bt_bfcr_status status = BT_BFCR_STATUS_OK; | |
087cd0f5 | 609 | ctf_field_class_int *fc = ctf_field_class_as_int(bfcr->cur_basic_field_class); |
5cd6d0e5 PP |
610 | |
611 | field_size = fc->base.size; | |
612 | bo = fc->base.byte_order; | |
613 | ||
614 | /* | |
615 | * Update current byte order now because we could be reading | |
616 | * the integer value of an enumeration class, and thus we know | |
617 | * here the actual supporting integer class's byte order. | |
618 | */ | |
619 | bfcr->cur_bo = bo; | |
620 | ||
621 | if (fc->is_signed) { | |
622 | int64_t v; | |
623 | ||
80870e64 | 624 | read_signed_bitfield(bfcr, buf, at, field_size, bo, &v); |
5cd6d0e5 PP |
625 | |
626 | if (bfcr->user.cbs.classes.signed_int) { | |
ef267d12 | 627 | BT_COMP_LOGT("Calling user function (signed integer)."); |
5cd6d0e5 PP |
628 | status = bfcr->user.cbs.classes.signed_int(v, |
629 | bfcr->cur_basic_field_class, bfcr->user.data); | |
ef267d12 | 630 | BT_COMP_LOGT("User function returned: status=%s", |
5cd6d0e5 PP |
631 | bt_bfcr_status_string(status)); |
632 | if (status != BT_BFCR_STATUS_OK) { | |
c4a714d2 | 633 | BT_COMP_LOGW("User function failed: " |
5cd6d0e5 PP |
634 | "bfcr-addr=%p, status=%s", |
635 | bfcr, bt_bfcr_status_string(status)); | |
636 | } | |
637 | } | |
638 | } else { | |
639 | uint64_t v; | |
640 | ||
80870e64 | 641 | read_unsigned_bitfield(bfcr, buf, at, field_size, bo, &v); |
5cd6d0e5 PP |
642 | |
643 | if (bfcr->user.cbs.classes.unsigned_int) { | |
ef267d12 | 644 | BT_COMP_LOGT("Calling user function (unsigned integer)."); |
5cd6d0e5 PP |
645 | status = bfcr->user.cbs.classes.unsigned_int(v, |
646 | bfcr->cur_basic_field_class, bfcr->user.data); | |
ef267d12 | 647 | BT_COMP_LOGT("User function returned: status=%s", |
5cd6d0e5 PP |
648 | bt_bfcr_status_string(status)); |
649 | if (status != BT_BFCR_STATUS_OK) { | |
c4a714d2 | 650 | BT_COMP_LOGW("User function failed: " |
5cd6d0e5 PP |
651 | "bfcr-addr=%p, status=%s", |
652 | bfcr, bt_bfcr_status_string(status)); | |
653 | } | |
654 | } | |
655 | } | |
656 | ||
657 | return status; | |
658 | } | |
659 | ||
660 | static inline | |
661 | enum bt_bfcr_status read_bit_array_class_and_call_continue(struct bt_bfcr *bfcr, | |
662 | read_basic_and_call_cb_t read_basic_and_call_cb) | |
663 | { | |
664 | size_t available; | |
665 | size_t needed_bits; | |
666 | enum bt_bfcr_status status = BT_BFCR_STATUS_OK; | |
087cd0f5 | 667 | ctf_field_class_bit_array *fc = ctf_field_class_as_bit_array(bfcr->cur_basic_field_class); |
5cd6d0e5 PP |
668 | |
669 | if (!at_least_one_bit_left(bfcr)) { | |
ef267d12 | 670 | BT_COMP_LOGT("Reached end of data: bfcr-addr=%p", bfcr); |
5cd6d0e5 PP |
671 | status = BT_BFCR_STATUS_EOF; |
672 | goto end; | |
673 | } | |
674 | ||
675 | available = available_bits(bfcr); | |
676 | needed_bits = fc->size - bfcr->stitch.at; | |
ef267d12 | 677 | BT_COMP_LOGT("Continuing basic field decoding: " |
fca9fd7d | 678 | "bfcr-addr=%p, field-size=%u, needed-size=%zu, " |
5cd6d0e5 PP |
679 | "available-size=%zu", |
680 | bfcr, fc->size, needed_bits, available); | |
681 | if (needed_bits <= available) { | |
682 | /* We have all the bits; append to stitch, then decode */ | |
683 | stitch_append_from_buf(bfcr, needed_bits); | |
684 | status = read_basic_and_call_cb(bfcr, bfcr->stitch.buf, | |
685 | bfcr->stitch.offset); | |
686 | if (status != BT_BFCR_STATUS_OK) { | |
c4a714d2 | 687 | BT_COMP_LOGW("Cannot read basic field: " |
5cd6d0e5 PP |
688 | "bfcr-addr=%p, fc-addr=%p, status=%s", |
689 | bfcr, bfcr->cur_basic_field_class, | |
690 | bt_bfcr_status_string(status)); | |
691 | goto end; | |
692 | } | |
693 | ||
694 | if (stack_empty(bfcr->stack)) { | |
695 | /* Root is a basic class */ | |
696 | bfcr->state = BFCR_STATE_DONE; | |
697 | } else { | |
698 | /* Go to next field */ | |
699 | stack_top(bfcr->stack)->index++; | |
700 | bfcr->state = BFCR_STATE_NEXT_FIELD; | |
701 | bfcr->last_bo = bfcr->cur_bo; | |
702 | } | |
703 | goto end; | |
704 | } | |
705 | ||
706 | /* We are here; it means we don't have enough data to decode this */ | |
ef267d12 | 707 | BT_COMP_LOGT_STR("Not enough data to read the next basic field: appending to stitch buffer."); |
5cd6d0e5 PP |
708 | stitch_append_from_remaining_buf(bfcr); |
709 | status = BT_BFCR_STATUS_EOF; | |
710 | ||
711 | end: | |
712 | return status; | |
713 | } | |
714 | ||
715 | static inline | |
716 | enum bt_bfcr_status read_bit_array_class_and_call_begin(struct bt_bfcr *bfcr, | |
717 | read_basic_and_call_cb_t read_basic_and_call_cb) | |
718 | { | |
719 | size_t available; | |
720 | enum bt_bfcr_status status = BT_BFCR_STATUS_OK; | |
087cd0f5 | 721 | ctf_field_class_bit_array *fc = ctf_field_class_as_bit_array(bfcr->cur_basic_field_class); |
5cd6d0e5 PP |
722 | |
723 | if (!at_least_one_bit_left(bfcr)) { | |
ef267d12 | 724 | BT_COMP_LOGT("Reached end of data: bfcr-addr=%p", bfcr); |
5cd6d0e5 PP |
725 | status = BT_BFCR_STATUS_EOF; |
726 | goto end; | |
727 | } | |
728 | ||
729 | status = validate_contiguous_bo(bfcr, fc->byte_order); | |
730 | if (status != BT_BFCR_STATUS_OK) { | |
731 | /* validate_contiguous_bo() logs errors */ | |
732 | goto end; | |
733 | } | |
734 | ||
735 | available = available_bits(bfcr); | |
736 | ||
737 | if (fc->size <= available) { | |
738 | /* We have all the bits; decode and set now */ | |
98b15851 | 739 | BT_ASSERT_DBG(bfcr->buf.addr); |
5cd6d0e5 PP |
740 | status = read_basic_and_call_cb(bfcr, bfcr->buf.addr, |
741 | buf_at_from_addr(bfcr)); | |
742 | if (status != BT_BFCR_STATUS_OK) { | |
c4a714d2 | 743 | BT_COMP_LOGW("Cannot read basic field: " |
5cd6d0e5 PP |
744 | "bfcr-addr=%p, fc-addr=%p, status=%s", |
745 | bfcr, bfcr->cur_basic_field_class, | |
746 | bt_bfcr_status_string(status)); | |
747 | goto end; | |
748 | } | |
749 | ||
750 | consume_bits(bfcr, fc->size); | |
751 | ||
752 | if (stack_empty(bfcr->stack)) { | |
753 | /* Root is a basic class */ | |
754 | bfcr->state = BFCR_STATE_DONE; | |
755 | } else { | |
756 | /* Go to next field */ | |
757 | stack_top(bfcr->stack)->index++; | |
758 | bfcr->state = BFCR_STATE_NEXT_FIELD; | |
759 | bfcr->last_bo = bfcr->cur_bo; | |
760 | } | |
761 | ||
762 | goto end; | |
763 | } | |
764 | ||
765 | /* We are here; it means we don't have enough data to decode this */ | |
ef267d12 | 766 | BT_COMP_LOGT_STR("Not enough data to read the next basic field: setting stitch buffer."); |
5cd6d0e5 PP |
767 | stitch_set_from_remaining_buf(bfcr); |
768 | bfcr->state = BFCR_STATE_READ_BASIC_CONTINUE; | |
769 | status = BT_BFCR_STATUS_EOF; | |
770 | ||
771 | end: | |
772 | return status; | |
773 | } | |
774 | ||
775 | static inline | |
776 | enum bt_bfcr_status read_basic_int_class_and_call_begin( | |
777 | struct bt_bfcr *bfcr) | |
778 | { | |
779 | return read_bit_array_class_and_call_begin(bfcr, read_basic_int_and_call_cb); | |
780 | } | |
781 | ||
782 | static inline | |
783 | enum bt_bfcr_status read_basic_int_class_and_call_continue( | |
784 | struct bt_bfcr *bfcr) | |
785 | { | |
786 | return read_bit_array_class_and_call_continue(bfcr, | |
787 | read_basic_int_and_call_cb); | |
788 | } | |
789 | ||
790 | static inline | |
791 | enum bt_bfcr_status read_basic_float_class_and_call_begin( | |
792 | struct bt_bfcr *bfcr) | |
793 | { | |
794 | return read_bit_array_class_and_call_begin(bfcr, | |
795 | read_basic_float_and_call_cb); | |
796 | } | |
797 | ||
798 | static inline | |
799 | enum bt_bfcr_status read_basic_float_class_and_call_continue( | |
800 | struct bt_bfcr *bfcr) | |
801 | { | |
802 | return read_bit_array_class_and_call_continue(bfcr, | |
803 | read_basic_float_and_call_cb); | |
804 | } | |
805 | ||
806 | static inline | |
807 | enum bt_bfcr_status read_basic_string_class_and_call( | |
808 | struct bt_bfcr *bfcr, bool begin) | |
809 | { | |
810 | size_t buf_at_bytes; | |
811 | const uint8_t *result; | |
812 | size_t available_bytes; | |
813 | const uint8_t *first_chr; | |
814 | enum bt_bfcr_status status = BT_BFCR_STATUS_OK; | |
815 | ||
816 | if (!at_least_one_bit_left(bfcr)) { | |
ef267d12 | 817 | BT_COMP_LOGT("Reached end of data: bfcr-addr=%p", bfcr); |
5cd6d0e5 PP |
818 | status = BT_BFCR_STATUS_EOF; |
819 | goto end; | |
820 | } | |
821 | ||
98b15851 | 822 | BT_ASSERT_DBG(buf_at_from_addr(bfcr) % 8 == 0); |
5cd6d0e5 PP |
823 | available_bytes = BITS_TO_BYTES_FLOOR(available_bits(bfcr)); |
824 | buf_at_bytes = BITS_TO_BYTES_FLOOR(buf_at_from_addr(bfcr)); | |
98b15851 | 825 | BT_ASSERT_DBG(bfcr->buf.addr); |
5cd6d0e5 | 826 | first_chr = &bfcr->buf.addr[buf_at_bytes]; |
087cd0f5 | 827 | result = (const uint8_t *) memchr(first_chr, '\0', available_bytes); |
5cd6d0e5 PP |
828 | |
829 | if (begin && bfcr->user.cbs.classes.string_begin) { | |
ef267d12 | 830 | BT_COMP_LOGT("Calling user function (string, beginning)."); |
5cd6d0e5 PP |
831 | status = bfcr->user.cbs.classes.string_begin( |
832 | bfcr->cur_basic_field_class, bfcr->user.data); | |
ef267d12 | 833 | BT_COMP_LOGT("User function returned: status=%s", |
5cd6d0e5 PP |
834 | bt_bfcr_status_string(status)); |
835 | if (status != BT_BFCR_STATUS_OK) { | |
c4a714d2 | 836 | BT_COMP_LOGW("User function failed: bfcr-addr=%p, status=%s", |
5cd6d0e5 PP |
837 | bfcr, bt_bfcr_status_string(status)); |
838 | goto end; | |
839 | } | |
840 | } | |
841 | ||
842 | if (!result) { | |
843 | /* No null character yet */ | |
844 | if (bfcr->user.cbs.classes.string) { | |
ef267d12 | 845 | BT_COMP_LOGT("Calling user function (substring)."); |
5cd6d0e5 PP |
846 | status = bfcr->user.cbs.classes.string( |
847 | (const char *) first_chr, | |
848 | available_bytes, bfcr->cur_basic_field_class, | |
849 | bfcr->user.data); | |
ef267d12 | 850 | BT_COMP_LOGT("User function returned: status=%s", |
5cd6d0e5 PP |
851 | bt_bfcr_status_string(status)); |
852 | if (status != BT_BFCR_STATUS_OK) { | |
c4a714d2 | 853 | BT_COMP_LOGW("User function failed: " |
5cd6d0e5 PP |
854 | "bfcr-addr=%p, status=%s", |
855 | bfcr, bt_bfcr_status_string(status)); | |
856 | goto end; | |
857 | } | |
858 | } | |
859 | ||
860 | consume_bits(bfcr, BYTES_TO_BITS(available_bytes)); | |
861 | bfcr->state = BFCR_STATE_READ_BASIC_CONTINUE; | |
862 | status = BT_BFCR_STATUS_EOF; | |
863 | } else { | |
864 | /* Found the null character */ | |
865 | size_t result_len = (size_t) (result - first_chr); | |
866 | ||
867 | if (bfcr->user.cbs.classes.string && result_len) { | |
ef267d12 | 868 | BT_COMP_LOGT("Calling user function (substring)."); |
5cd6d0e5 PP |
869 | status = bfcr->user.cbs.classes.string( |
870 | (const char *) first_chr, | |
871 | result_len, bfcr->cur_basic_field_class, | |
872 | bfcr->user.data); | |
ef267d12 | 873 | BT_COMP_LOGT("User function returned: status=%s", |
5cd6d0e5 PP |
874 | bt_bfcr_status_string(status)); |
875 | if (status != BT_BFCR_STATUS_OK) { | |
c4a714d2 | 876 | BT_COMP_LOGW("User function failed: " |
5cd6d0e5 PP |
877 | "bfcr-addr=%p, status=%s", |
878 | bfcr, bt_bfcr_status_string(status)); | |
879 | goto end; | |
880 | } | |
881 | } | |
882 | ||
883 | if (bfcr->user.cbs.classes.string_end) { | |
ef267d12 | 884 | BT_COMP_LOGT("Calling user function (string, end)."); |
5cd6d0e5 PP |
885 | status = bfcr->user.cbs.classes.string_end( |
886 | bfcr->cur_basic_field_class, bfcr->user.data); | |
ef267d12 | 887 | BT_COMP_LOGT("User function returned: status=%s", |
5cd6d0e5 PP |
888 | bt_bfcr_status_string(status)); |
889 | if (status != BT_BFCR_STATUS_OK) { | |
c4a714d2 | 890 | BT_COMP_LOGW("User function failed: " |
5cd6d0e5 PP |
891 | "bfcr-addr=%p, status=%s", |
892 | bfcr, bt_bfcr_status_string(status)); | |
893 | goto end; | |
894 | } | |
895 | } | |
896 | ||
897 | consume_bits(bfcr, BYTES_TO_BITS(result_len + 1)); | |
898 | ||
899 | if (stack_empty(bfcr->stack)) { | |
900 | /* Root is a basic class */ | |
901 | bfcr->state = BFCR_STATE_DONE; | |
902 | } else { | |
903 | /* Go to next field */ | |
904 | stack_top(bfcr->stack)->index++; | |
905 | bfcr->state = BFCR_STATE_NEXT_FIELD; | |
906 | bfcr->last_bo = bfcr->cur_bo; | |
907 | } | |
908 | } | |
909 | ||
910 | end: | |
911 | return status; | |
912 | } | |
913 | ||
914 | static inline | |
915 | enum bt_bfcr_status read_basic_begin_state(struct bt_bfcr *bfcr) | |
916 | { | |
917 | enum bt_bfcr_status status; | |
918 | ||
98b15851 | 919 | BT_ASSERT_DBG(bfcr->cur_basic_field_class); |
5cd6d0e5 | 920 | |
864cad70 PP |
921 | switch (bfcr->cur_basic_field_class->type) { |
922 | case CTF_FIELD_CLASS_TYPE_INT: | |
923 | case CTF_FIELD_CLASS_TYPE_ENUM: | |
5cd6d0e5 PP |
924 | status = read_basic_int_class_and_call_begin(bfcr); |
925 | break; | |
864cad70 | 926 | case CTF_FIELD_CLASS_TYPE_FLOAT: |
5cd6d0e5 PP |
927 | status = read_basic_float_class_and_call_begin(bfcr); |
928 | break; | |
864cad70 | 929 | case CTF_FIELD_CLASS_TYPE_STRING: |
5cd6d0e5 PP |
930 | status = read_basic_string_class_and_call(bfcr, true); |
931 | break; | |
932 | default: | |
498e7994 | 933 | bt_common_abort(); |
5cd6d0e5 PP |
934 | } |
935 | ||
936 | return status; | |
937 | } | |
938 | ||
939 | static inline | |
940 | enum bt_bfcr_status read_basic_continue_state(struct bt_bfcr *bfcr) | |
941 | { | |
942 | enum bt_bfcr_status status; | |
943 | ||
98b15851 | 944 | BT_ASSERT_DBG(bfcr->cur_basic_field_class); |
5cd6d0e5 | 945 | |
864cad70 PP |
946 | switch (bfcr->cur_basic_field_class->type) { |
947 | case CTF_FIELD_CLASS_TYPE_INT: | |
948 | case CTF_FIELD_CLASS_TYPE_ENUM: | |
5cd6d0e5 PP |
949 | status = read_basic_int_class_and_call_continue(bfcr); |
950 | break; | |
864cad70 | 951 | case CTF_FIELD_CLASS_TYPE_FLOAT: |
5cd6d0e5 PP |
952 | status = read_basic_float_class_and_call_continue(bfcr); |
953 | break; | |
864cad70 | 954 | case CTF_FIELD_CLASS_TYPE_STRING: |
5cd6d0e5 PP |
955 | status = read_basic_string_class_and_call(bfcr, false); |
956 | break; | |
957 | default: | |
498e7994 | 958 | bt_common_abort(); |
5cd6d0e5 PP |
959 | } |
960 | ||
961 | return status; | |
962 | } | |
963 | ||
964 | static inline | |
965 | size_t bits_to_skip_to_align_to(struct bt_bfcr *bfcr, size_t align) | |
966 | { | |
967 | size_t aligned_packet_at; | |
968 | ||
328342cd | 969 | aligned_packet_at = BT_ALIGN(packet_at(bfcr), align); |
5cd6d0e5 PP |
970 | return aligned_packet_at - packet_at(bfcr); |
971 | } | |
972 | ||
973 | static inline | |
974 | enum bt_bfcr_status align_class_state(struct bt_bfcr *bfcr, | |
975 | struct ctf_field_class *field_class, enum bfcr_state next_state) | |
976 | { | |
977 | unsigned int field_alignment; | |
978 | size_t skip_bits; | |
979 | enum bt_bfcr_status status = BT_BFCR_STATUS_OK; | |
980 | ||
981 | /* Get field's alignment */ | |
982 | field_alignment = field_class->alignment; | |
983 | ||
984 | /* | |
985 | * 0 means "undefined" for variants; what we really want is 1 | |
986 | * (always aligned) | |
987 | */ | |
98b15851 | 988 | BT_ASSERT_DBG(field_alignment >= 1); |
5cd6d0e5 PP |
989 | |
990 | /* Compute how many bits we need to skip */ | |
991 | skip_bits = bits_to_skip_to_align_to(bfcr, (size_t) field_alignment); | |
992 | ||
993 | /* Nothing to skip? aligned */ | |
994 | if (skip_bits == 0) { | |
995 | bfcr->state = next_state; | |
996 | goto end; | |
997 | } | |
998 | ||
999 | /* Make sure there's at least one bit left */ | |
1000 | if (!at_least_one_bit_left(bfcr)) { | |
1001 | status = BT_BFCR_STATUS_EOF; | |
1002 | goto end; | |
1003 | } | |
1004 | ||
1005 | /* Consume as many bits as possible in what's left */ | |
1006 | consume_bits(bfcr, MIN(available_bits(bfcr), skip_bits)); | |
1007 | ||
1008 | /* Are we done now? */ | |
1009 | skip_bits = bits_to_skip_to_align_to(bfcr, field_alignment); | |
1010 | if (skip_bits == 0) { | |
1011 | /* Yes: go to next state */ | |
1012 | bfcr->state = next_state; | |
1013 | goto end; | |
1014 | } else { | |
1015 | /* No: need more data */ | |
ef267d12 | 1016 | BT_COMP_LOGT("Reached end of data when aligning: bfcr-addr=%p", bfcr); |
5cd6d0e5 PP |
1017 | status = BT_BFCR_STATUS_EOF; |
1018 | } | |
1019 | ||
1020 | end: | |
1021 | return status; | |
1022 | } | |
1023 | ||
1024 | static inline | |
1025 | enum bt_bfcr_status next_field_state(struct bt_bfcr *bfcr) | |
1026 | { | |
1027 | int ret; | |
1028 | struct stack_entry *top; | |
1029 | struct ctf_field_class *next_field_class = NULL; | |
1030 | enum bt_bfcr_status status = BT_BFCR_STATUS_OK; | |
1031 | ||
1032 | if (stack_empty(bfcr->stack)) { | |
1033 | goto end; | |
1034 | } | |
1035 | ||
1036 | top = stack_top(bfcr->stack); | |
1037 | ||
1038 | /* Are we done with this base class? */ | |
1039 | while (top->index == top->base_len) { | |
1040 | if (bfcr->user.cbs.classes.compound_end) { | |
ef267d12 | 1041 | BT_COMP_LOGT("Calling user function (compound, end)."); |
5cd6d0e5 PP |
1042 | status = bfcr->user.cbs.classes.compound_end( |
1043 | top->base_class, bfcr->user.data); | |
ef267d12 | 1044 | BT_COMP_LOGT("User function returned: status=%s", |
5cd6d0e5 PP |
1045 | bt_bfcr_status_string(status)); |
1046 | if (status != BT_BFCR_STATUS_OK) { | |
c4a714d2 | 1047 | BT_COMP_LOGW("User function failed: bfcr-addr=%p, status=%s", |
5cd6d0e5 PP |
1048 | bfcr, bt_bfcr_status_string(status)); |
1049 | goto end; | |
1050 | } | |
1051 | } | |
1052 | ||
1053 | stack_pop(bfcr->stack); | |
1054 | ||
1055 | /* Are we done with the root class? */ | |
1056 | if (stack_empty(bfcr->stack)) { | |
1057 | bfcr->state = BFCR_STATE_DONE; | |
1058 | goto end; | |
1059 | } | |
1060 | ||
1061 | top = stack_top(bfcr->stack); | |
1062 | top->index++; | |
1063 | } | |
1064 | ||
1065 | /* Get next field's class */ | |
864cad70 PP |
1066 | switch (top->base_class->type) { |
1067 | case CTF_FIELD_CLASS_TYPE_STRUCT: | |
5cd6d0e5 | 1068 | next_field_class = ctf_field_class_struct_borrow_member_by_index( |
087cd0f5 | 1069 | ctf_field_class_as_struct(top->base_class), (uint64_t) top->index)->fc; |
5cd6d0e5 | 1070 | break; |
864cad70 PP |
1071 | case CTF_FIELD_CLASS_TYPE_ARRAY: |
1072 | case CTF_FIELD_CLASS_TYPE_SEQUENCE: | |
5cd6d0e5 | 1073 | { |
087cd0f5 SM |
1074 | ctf_field_class_array_base *array_fc = |
1075 | ctf_field_class_as_array_base(top->base_class); | |
5cd6d0e5 PP |
1076 | |
1077 | next_field_class = array_fc->elem_fc; | |
1078 | break; | |
1079 | } | |
864cad70 | 1080 | case CTF_FIELD_CLASS_TYPE_VARIANT: |
5cd6d0e5 PP |
1081 | /* Variant classes are dynamic: the user should know! */ |
1082 | next_field_class = | |
1083 | bfcr->user.cbs.query.borrow_variant_selected_field_class( | |
1084 | top->base_class, bfcr->user.data); | |
1085 | break; | |
1086 | default: | |
1087 | break; | |
1088 | } | |
1089 | ||
1090 | if (!next_field_class) { | |
c4a714d2 | 1091 | BT_COMP_LOGW("Cannot get the field class of the next field: " |
864cad70 | 1092 | "bfcr-addr=%p, base-fc-addr=%p, base-fc-type=%d, " |
5cd6d0e5 | 1093 | "index=%" PRId64, |
864cad70 PP |
1094 | bfcr, top->base_class, top->base_class->type, |
1095 | top->index); | |
5cd6d0e5 PP |
1096 | status = BT_BFCR_STATUS_ERROR; |
1097 | goto end; | |
1098 | } | |
1099 | ||
1100 | if (next_field_class->is_compound) { | |
1101 | if (bfcr->user.cbs.classes.compound_begin) { | |
ef267d12 | 1102 | BT_COMP_LOGT("Calling user function (compound, begin)."); |
5cd6d0e5 PP |
1103 | status = bfcr->user.cbs.classes.compound_begin( |
1104 | next_field_class, bfcr->user.data); | |
ef267d12 | 1105 | BT_COMP_LOGT("User function returned: status=%s", |
5cd6d0e5 PP |
1106 | bt_bfcr_status_string(status)); |
1107 | if (status != BT_BFCR_STATUS_OK) { | |
c4a714d2 | 1108 | BT_COMP_LOGW("User function failed: bfcr-addr=%p, status=%s", |
5cd6d0e5 PP |
1109 | bfcr, bt_bfcr_status_string(status)); |
1110 | goto end; | |
1111 | } | |
1112 | } | |
1113 | ||
1114 | ret = stack_push_with_len(bfcr, next_field_class); | |
1115 | if (ret) { | |
1116 | /* stack_push_with_len() logs errors */ | |
1117 | status = BT_BFCR_STATUS_ERROR; | |
1118 | goto end; | |
1119 | } | |
1120 | ||
1121 | /* Next state: align a compound class */ | |
1122 | bfcr->state = BFCR_STATE_ALIGN_COMPOUND; | |
1123 | } else { | |
1124 | /* Replace current basic field class */ | |
ef267d12 | 1125 | BT_COMP_LOGT("Replacing current basic field class: " |
5cd6d0e5 PP |
1126 | "bfcr-addr=%p, cur-basic-fc-addr=%p, " |
1127 | "next-basic-fc-addr=%p", | |
1128 | bfcr, bfcr->cur_basic_field_class, next_field_class); | |
1129 | bfcr->cur_basic_field_class = next_field_class; | |
1130 | ||
1131 | /* Next state: align a basic class */ | |
1132 | bfcr->state = BFCR_STATE_ALIGN_BASIC; | |
1133 | } | |
1134 | ||
1135 | end: | |
1136 | return status; | |
1137 | } | |
1138 | ||
1139 | static inline | |
1140 | enum bt_bfcr_status handle_state(struct bt_bfcr *bfcr) | |
1141 | { | |
1142 | enum bt_bfcr_status status = BT_BFCR_STATUS_OK; | |
1143 | ||
ef267d12 | 1144 | BT_COMP_LOGT("Handling state: bfcr-addr=%p, state=%s", |
5cd6d0e5 PP |
1145 | bfcr, bfcr_state_string(bfcr->state)); |
1146 | ||
1147 | switch (bfcr->state) { | |
1148 | case BFCR_STATE_NEXT_FIELD: | |
1149 | status = next_field_state(bfcr); | |
1150 | break; | |
1151 | case BFCR_STATE_ALIGN_BASIC: | |
1152 | status = align_class_state(bfcr, bfcr->cur_basic_field_class, | |
1153 | BFCR_STATE_READ_BASIC_BEGIN); | |
1154 | break; | |
1155 | case BFCR_STATE_ALIGN_COMPOUND: | |
1156 | status = align_class_state(bfcr, stack_top(bfcr->stack)->base_class, | |
1157 | BFCR_STATE_NEXT_FIELD); | |
1158 | break; | |
1159 | case BFCR_STATE_READ_BASIC_BEGIN: | |
1160 | status = read_basic_begin_state(bfcr); | |
1161 | break; | |
1162 | case BFCR_STATE_READ_BASIC_CONTINUE: | |
1163 | status = read_basic_continue_state(bfcr); | |
1164 | break; | |
1165 | case BFCR_STATE_DONE: | |
1166 | break; | |
1167 | } | |
1168 | ||
ef267d12 | 1169 | BT_COMP_LOGT("Handled state: bfcr-addr=%p, status=%s", |
5cd6d0e5 PP |
1170 | bfcr, bt_bfcr_status_string(status)); |
1171 | return status; | |
1172 | } | |
1173 | ||
1174 | BT_HIDDEN | |
80870e64 | 1175 | struct bt_bfcr *bt_bfcr_create(struct bt_bfcr_cbs cbs, void *data, |
c4a714d2 | 1176 | bt_logging_level log_level, bt_self_component *self_comp) |
5cd6d0e5 PP |
1177 | { |
1178 | struct bt_bfcr *bfcr; | |
1179 | ||
c4a714d2 | 1180 | BT_COMP_LOG_CUR_LVL(BT_LOG_DEBUG, log_level, self_comp, |
80870e64 | 1181 | "Creating binary field class reader (BFCR)."); |
5cd6d0e5 PP |
1182 | bfcr = g_new0(struct bt_bfcr, 1); |
1183 | if (!bfcr) { | |
c4a714d2 | 1184 | BT_COMP_LOG_CUR_LVL(BT_LOG_ERROR, log_level, self_comp, |
80870e64 | 1185 | "Failed to allocate one binary class reader."); |
5cd6d0e5 PP |
1186 | goto end; |
1187 | } | |
1188 | ||
80870e64 | 1189 | bfcr->log_level = log_level; |
c4a714d2 | 1190 | bfcr->self_comp = self_comp; |
80870e64 | 1191 | bfcr->stack = stack_new(bfcr); |
5cd6d0e5 | 1192 | if (!bfcr->stack) { |
c4a714d2 | 1193 | BT_COMP_LOGE_STR("Cannot create BFCR's stack."); |
5cd6d0e5 PP |
1194 | bt_bfcr_destroy(bfcr); |
1195 | bfcr = NULL; | |
1196 | goto end; | |
1197 | } | |
1198 | ||
1199 | bfcr->state = BFCR_STATE_NEXT_FIELD; | |
1200 | bfcr->user.cbs = cbs; | |
1201 | bfcr->user.data = data; | |
c4a714d2 | 1202 | BT_COMP_LOGD("Created BFCR: addr=%p", bfcr); |
5cd6d0e5 PP |
1203 | |
1204 | end: | |
1205 | return bfcr; | |
1206 | } | |
1207 | ||
1208 | BT_HIDDEN | |
1209 | void bt_bfcr_destroy(struct bt_bfcr *bfcr) | |
1210 | { | |
1211 | if (bfcr->stack) { | |
1212 | stack_destroy(bfcr->stack); | |
1213 | } | |
1214 | ||
c4a714d2 | 1215 | BT_COMP_LOGD("Destroying BFCR: addr=%p", bfcr); |
5cd6d0e5 PP |
1216 | g_free(bfcr); |
1217 | } | |
1218 | ||
1219 | static | |
1220 | void reset(struct bt_bfcr *bfcr) | |
1221 | { | |
c4a714d2 | 1222 | BT_COMP_LOGD("Resetting BFCR: addr=%p", bfcr); |
5cd6d0e5 PP |
1223 | stack_clear(bfcr->stack); |
1224 | stitch_reset(bfcr); | |
1225 | bfcr->buf.addr = NULL; | |
e2bd7d40 | 1226 | bfcr->last_bo = CTF_BYTE_ORDER_UNKNOWN; |
5cd6d0e5 PP |
1227 | } |
1228 | ||
1229 | static | |
1230 | void update_packet_offset(struct bt_bfcr *bfcr) | |
1231 | { | |
ef267d12 | 1232 | BT_COMP_LOGT("Updating packet offset for next call: " |
5cd6d0e5 PP |
1233 | "bfcr-addr=%p, cur-packet-offset=%zu, next-packet-offset=%zu", |
1234 | bfcr, bfcr->buf.packet_offset, | |
1235 | bfcr->buf.packet_offset + bfcr->buf.at); | |
1236 | bfcr->buf.packet_offset += bfcr->buf.at; | |
1237 | } | |
1238 | ||
1239 | BT_HIDDEN | |
1240 | size_t bt_bfcr_start(struct bt_bfcr *bfcr, | |
1241 | struct ctf_field_class *cls, const uint8_t *buf, | |
1242 | size_t offset, size_t packet_offset, size_t sz, | |
1243 | enum bt_bfcr_status *status) | |
1244 | { | |
98b15851 PP |
1245 | BT_ASSERT_DBG(bfcr); |
1246 | BT_ASSERT_DBG(BYTES_TO_BITS(sz) >= offset); | |
5cd6d0e5 PP |
1247 | reset(bfcr); |
1248 | bfcr->buf.addr = buf; | |
1249 | bfcr->buf.offset = offset; | |
1250 | bfcr->buf.at = 0; | |
1251 | bfcr->buf.packet_offset = packet_offset; | |
1252 | bfcr->buf.buf_sz = sz; | |
1253 | bfcr->buf.sz = BYTES_TO_BITS(sz) - offset; | |
1254 | *status = BT_BFCR_STATUS_OK; | |
1255 | ||
ef267d12 | 1256 | BT_COMP_LOGT("Starting decoding: bfcr-addr=%p, fc-addr=%p, " |
5cd6d0e5 PP |
1257 | "buf-addr=%p, buf-size=%zu, offset=%zu, " |
1258 | "packet-offset=%zu", | |
1259 | bfcr, cls, buf, sz, offset, packet_offset); | |
1260 | ||
1261 | /* Set root class */ | |
1262 | if (cls->is_compound) { | |
1263 | /* Compound class: push on visit stack */ | |
1264 | int stack_ret; | |
1265 | ||
1266 | if (bfcr->user.cbs.classes.compound_begin) { | |
ef267d12 | 1267 | BT_COMP_LOGT("Calling user function (compound, begin)."); |
5cd6d0e5 PP |
1268 | *status = bfcr->user.cbs.classes.compound_begin( |
1269 | cls, bfcr->user.data); | |
ef267d12 | 1270 | BT_COMP_LOGT("User function returned: status=%s", |
5cd6d0e5 PP |
1271 | bt_bfcr_status_string(*status)); |
1272 | if (*status != BT_BFCR_STATUS_OK) { | |
c4a714d2 | 1273 | BT_COMP_LOGW("User function failed: bfcr-addr=%p, status=%s", |
5cd6d0e5 PP |
1274 | bfcr, bt_bfcr_status_string(*status)); |
1275 | goto end; | |
1276 | } | |
1277 | } | |
1278 | ||
1279 | stack_ret = stack_push_with_len(bfcr, cls); | |
1280 | if (stack_ret) { | |
1281 | /* stack_push_with_len() logs errors */ | |
1282 | *status = BT_BFCR_STATUS_ERROR; | |
1283 | goto end; | |
1284 | } | |
1285 | ||
1286 | bfcr->state = BFCR_STATE_ALIGN_COMPOUND; | |
1287 | } else { | |
1288 | /* Basic class: set as current basic class */ | |
1289 | bfcr->cur_basic_field_class = cls; | |
1290 | bfcr->state = BFCR_STATE_ALIGN_BASIC; | |
1291 | } | |
1292 | ||
1293 | /* Run the machine! */ | |
ef267d12 | 1294 | BT_COMP_LOGT_STR("Running the state machine."); |
5cd6d0e5 PP |
1295 | |
1296 | while (true) { | |
1297 | *status = handle_state(bfcr); | |
1298 | if (*status != BT_BFCR_STATUS_OK || | |
1299 | bfcr->state == BFCR_STATE_DONE) { | |
1300 | break; | |
1301 | } | |
1302 | } | |
1303 | ||
1304 | /* Update packet offset for next time */ | |
1305 | update_packet_offset(bfcr); | |
1306 | ||
1307 | end: | |
1308 | return bfcr->buf.at; | |
1309 | } | |
1310 | ||
1311 | BT_HIDDEN | |
1312 | size_t bt_bfcr_continue(struct bt_bfcr *bfcr, const uint8_t *buf, size_t sz, | |
1313 | enum bt_bfcr_status *status) | |
1314 | { | |
98b15851 PP |
1315 | BT_ASSERT_DBG(bfcr); |
1316 | BT_ASSERT_DBG(buf); | |
1317 | BT_ASSERT_DBG(sz > 0); | |
5cd6d0e5 PP |
1318 | bfcr->buf.addr = buf; |
1319 | bfcr->buf.offset = 0; | |
1320 | bfcr->buf.at = 0; | |
1321 | bfcr->buf.buf_sz = sz; | |
1322 | bfcr->buf.sz = BYTES_TO_BITS(sz); | |
1323 | *status = BT_BFCR_STATUS_OK; | |
1324 | ||
ef267d12 | 1325 | BT_COMP_LOGT("Continuing decoding: bfcr-addr=%p, buf-addr=%p, buf-size=%zu", |
5cd6d0e5 PP |
1326 | bfcr, buf, sz); |
1327 | ||
1328 | /* Continue running the machine */ | |
ef267d12 | 1329 | BT_COMP_LOGT_STR("Running the state machine."); |
5cd6d0e5 PP |
1330 | |
1331 | while (true) { | |
1332 | *status = handle_state(bfcr); | |
1333 | if (*status != BT_BFCR_STATUS_OK || | |
1334 | bfcr->state == BFCR_STATE_DONE) { | |
1335 | break; | |
1336 | } | |
1337 | } | |
1338 | ||
1339 | /* Update packet offset for next time */ | |
1340 | update_packet_offset(bfcr); | |
1341 | return bfcr->buf.at; | |
1342 | } | |
1343 | ||
1344 | BT_HIDDEN | |
1345 | void bt_bfcr_set_unsigned_int_cb(struct bt_bfcr *bfcr, | |
1346 | bt_bfcr_unsigned_int_cb_func cb) | |
1347 | { | |
98b15851 PP |
1348 | BT_ASSERT_DBG(bfcr); |
1349 | BT_ASSERT_DBG(cb); | |
5cd6d0e5 PP |
1350 | bfcr->user.cbs.classes.unsigned_int = cb; |
1351 | } |