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718c602d AH |
1 | /* |
2 | * auxtrace.c: AUX area trace support | |
3 | * Copyright (c) 2013-2015, Intel Corporation. | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms and conditions of the GNU General Public License, | |
7 | * version 2, as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | */ | |
15 | ||
fd20e811 | 16 | #include <inttypes.h> |
718c602d AH |
17 | #include <sys/types.h> |
18 | #include <sys/mman.h> | |
19 | #include <stdbool.h> | |
1b36c03e AH |
20 | #include <string.h> |
21 | #include <limits.h> | |
22 | #include <errno.h> | |
718c602d AH |
23 | |
24 | #include <linux/kernel.h> | |
25 | #include <linux/perf_event.h> | |
26 | #include <linux/types.h> | |
27 | #include <linux/bitops.h> | |
28 | #include <linux/log2.h> | |
e5027893 | 29 | #include <linux/string.h> |
718c602d | 30 | |
e5027893 | 31 | #include <sys/param.h> |
9e0cc4fe | 32 | #include <stdlib.h> |
85ed4729 | 33 | #include <stdio.h> |
9e0cc4fe | 34 | #include <string.h> |
e5027893 | 35 | #include <limits.h> |
9e0cc4fe | 36 | #include <errno.h> |
e5027893 | 37 | #include <linux/list.h> |
9e0cc4fe | 38 | |
718c602d AH |
39 | #include "../perf.h" |
40 | #include "util.h" | |
41 | #include "evlist.h" | |
1b36c03e AH |
42 | #include "dso.h" |
43 | #include "map.h" | |
44 | #include "pmu.h" | |
45 | #include "evsel.h" | |
718c602d AH |
46 | #include "cpumap.h" |
47 | #include "thread_map.h" | |
48 | #include "asm/bug.h" | |
49 | #include "auxtrace.h" | |
50 | ||
c3278f02 AH |
51 | #include <linux/hash.h> |
52 | ||
9e0cc4fe | 53 | #include "event.h" |
85ed4729 | 54 | #include "session.h" |
9e0cc4fe | 55 | #include "debug.h" |
4b6ab94e | 56 | #include <subcmd/parse-options.h> |
9e0cc4fe | 57 | |
5efb1d54 | 58 | #include "intel-pt.h" |
d0170af7 | 59 | #include "intel-bts.h" |
5efb1d54 | 60 | |
3d689ed6 ACM |
61 | #include "sane_ctype.h" |
62 | #include "symbol/kallsyms.h" | |
63 | ||
718c602d AH |
64 | int auxtrace_mmap__mmap(struct auxtrace_mmap *mm, |
65 | struct auxtrace_mmap_params *mp, | |
66 | void *userpg, int fd) | |
67 | { | |
68 | struct perf_event_mmap_page *pc = userpg; | |
69 | ||
718c602d AH |
70 | WARN_ONCE(mm->base, "Uninitialized auxtrace_mmap\n"); |
71 | ||
72 | mm->userpg = userpg; | |
73 | mm->mask = mp->mask; | |
74 | mm->len = mp->len; | |
75 | mm->prev = 0; | |
76 | mm->idx = mp->idx; | |
77 | mm->tid = mp->tid; | |
78 | mm->cpu = mp->cpu; | |
79 | ||
80 | if (!mp->len) { | |
81 | mm->base = NULL; | |
82 | return 0; | |
83 | } | |
84 | ||
a7fde09a AH |
85 | #if BITS_PER_LONG != 64 && !defined(HAVE_SYNC_COMPARE_AND_SWAP_SUPPORT) |
86 | pr_err("Cannot use AUX area tracing mmaps\n"); | |
87 | return -1; | |
88 | #endif | |
89 | ||
718c602d AH |
90 | pc->aux_offset = mp->offset; |
91 | pc->aux_size = mp->len; | |
92 | ||
93 | mm->base = mmap(NULL, mp->len, mp->prot, MAP_SHARED, fd, mp->offset); | |
94 | if (mm->base == MAP_FAILED) { | |
95 | pr_debug2("failed to mmap AUX area\n"); | |
96 | mm->base = NULL; | |
97 | return -1; | |
98 | } | |
99 | ||
100 | return 0; | |
101 | } | |
102 | ||
103 | void auxtrace_mmap__munmap(struct auxtrace_mmap *mm) | |
104 | { | |
105 | if (mm->base) { | |
106 | munmap(mm->base, mm->len); | |
107 | mm->base = NULL; | |
108 | } | |
109 | } | |
110 | ||
111 | void auxtrace_mmap_params__init(struct auxtrace_mmap_params *mp, | |
112 | off_t auxtrace_offset, | |
113 | unsigned int auxtrace_pages, | |
114 | bool auxtrace_overwrite) | |
115 | { | |
116 | if (auxtrace_pages) { | |
117 | mp->offset = auxtrace_offset; | |
118 | mp->len = auxtrace_pages * (size_t)page_size; | |
119 | mp->mask = is_power_of_2(mp->len) ? mp->len - 1 : 0; | |
120 | mp->prot = PROT_READ | (auxtrace_overwrite ? 0 : PROT_WRITE); | |
121 | pr_debug2("AUX area mmap length %zu\n", mp->len); | |
122 | } else { | |
123 | mp->len = 0; | |
124 | } | |
125 | } | |
126 | ||
127 | void auxtrace_mmap_params__set_idx(struct auxtrace_mmap_params *mp, | |
128 | struct perf_evlist *evlist, int idx, | |
129 | bool per_cpu) | |
130 | { | |
131 | mp->idx = idx; | |
132 | ||
133 | if (per_cpu) { | |
134 | mp->cpu = evlist->cpus->map[idx]; | |
135 | if (evlist->threads) | |
e13798c7 | 136 | mp->tid = thread_map__pid(evlist->threads, 0); |
718c602d AH |
137 | else |
138 | mp->tid = -1; | |
139 | } else { | |
140 | mp->cpu = -1; | |
e13798c7 | 141 | mp->tid = thread_map__pid(evlist->threads, idx); |
718c602d AH |
142 | } |
143 | } | |
9e0cc4fe | 144 | |
e5027893 AH |
145 | #define AUXTRACE_INIT_NR_QUEUES 32 |
146 | ||
147 | static struct auxtrace_queue *auxtrace_alloc_queue_array(unsigned int nr_queues) | |
148 | { | |
149 | struct auxtrace_queue *queue_array; | |
150 | unsigned int max_nr_queues, i; | |
151 | ||
152 | max_nr_queues = UINT_MAX / sizeof(struct auxtrace_queue); | |
153 | if (nr_queues > max_nr_queues) | |
154 | return NULL; | |
155 | ||
156 | queue_array = calloc(nr_queues, sizeof(struct auxtrace_queue)); | |
157 | if (!queue_array) | |
158 | return NULL; | |
159 | ||
160 | for (i = 0; i < nr_queues; i++) { | |
161 | INIT_LIST_HEAD(&queue_array[i].head); | |
162 | queue_array[i].priv = NULL; | |
163 | } | |
164 | ||
165 | return queue_array; | |
166 | } | |
167 | ||
168 | int auxtrace_queues__init(struct auxtrace_queues *queues) | |
169 | { | |
170 | queues->nr_queues = AUXTRACE_INIT_NR_QUEUES; | |
171 | queues->queue_array = auxtrace_alloc_queue_array(queues->nr_queues); | |
172 | if (!queues->queue_array) | |
173 | return -ENOMEM; | |
174 | return 0; | |
175 | } | |
176 | ||
177 | static int auxtrace_queues__grow(struct auxtrace_queues *queues, | |
178 | unsigned int new_nr_queues) | |
179 | { | |
180 | unsigned int nr_queues = queues->nr_queues; | |
181 | struct auxtrace_queue *queue_array; | |
182 | unsigned int i; | |
183 | ||
184 | if (!nr_queues) | |
185 | nr_queues = AUXTRACE_INIT_NR_QUEUES; | |
186 | ||
187 | while (nr_queues && nr_queues < new_nr_queues) | |
188 | nr_queues <<= 1; | |
189 | ||
190 | if (nr_queues < queues->nr_queues || nr_queues < new_nr_queues) | |
191 | return -EINVAL; | |
192 | ||
193 | queue_array = auxtrace_alloc_queue_array(nr_queues); | |
194 | if (!queue_array) | |
195 | return -ENOMEM; | |
196 | ||
197 | for (i = 0; i < queues->nr_queues; i++) { | |
198 | list_splice_tail(&queues->queue_array[i].head, | |
199 | &queue_array[i].head); | |
200 | queue_array[i].priv = queues->queue_array[i].priv; | |
201 | } | |
202 | ||
203 | queues->nr_queues = nr_queues; | |
204 | queues->queue_array = queue_array; | |
205 | ||
206 | return 0; | |
207 | } | |
208 | ||
209 | static void *auxtrace_copy_data(u64 size, struct perf_session *session) | |
210 | { | |
211 | int fd = perf_data_file__fd(session->file); | |
212 | void *p; | |
213 | ssize_t ret; | |
214 | ||
215 | if (size > SSIZE_MAX) | |
216 | return NULL; | |
217 | ||
218 | p = malloc(size); | |
219 | if (!p) | |
220 | return NULL; | |
221 | ||
222 | ret = readn(fd, p, size); | |
223 | if (ret != (ssize_t)size) { | |
224 | free(p); | |
225 | return NULL; | |
226 | } | |
227 | ||
228 | return p; | |
229 | } | |
230 | ||
231 | static int auxtrace_queues__add_buffer(struct auxtrace_queues *queues, | |
232 | unsigned int idx, | |
233 | struct auxtrace_buffer *buffer) | |
234 | { | |
235 | struct auxtrace_queue *queue; | |
236 | int err; | |
237 | ||
238 | if (idx >= queues->nr_queues) { | |
239 | err = auxtrace_queues__grow(queues, idx + 1); | |
240 | if (err) | |
241 | return err; | |
242 | } | |
243 | ||
244 | queue = &queues->queue_array[idx]; | |
245 | ||
246 | if (!queue->set) { | |
247 | queue->set = true; | |
248 | queue->tid = buffer->tid; | |
249 | queue->cpu = buffer->cpu; | |
250 | } else if (buffer->cpu != queue->cpu || buffer->tid != queue->tid) { | |
251 | pr_err("auxtrace queue conflict: cpu %d, tid %d vs cpu %d, tid %d\n", | |
252 | queue->cpu, queue->tid, buffer->cpu, buffer->tid); | |
253 | return -EINVAL; | |
254 | } | |
255 | ||
256 | buffer->buffer_nr = queues->next_buffer_nr++; | |
257 | ||
258 | list_add_tail(&buffer->list, &queue->head); | |
259 | ||
260 | queues->new_data = true; | |
261 | queues->populated = true; | |
262 | ||
263 | return 0; | |
264 | } | |
265 | ||
266 | /* Limit buffers to 32MiB on 32-bit */ | |
267 | #define BUFFER_LIMIT_FOR_32_BIT (32 * 1024 * 1024) | |
268 | ||
269 | static int auxtrace_queues__split_buffer(struct auxtrace_queues *queues, | |
270 | unsigned int idx, | |
271 | struct auxtrace_buffer *buffer) | |
272 | { | |
273 | u64 sz = buffer->size; | |
274 | bool consecutive = false; | |
275 | struct auxtrace_buffer *b; | |
276 | int err; | |
277 | ||
278 | while (sz > BUFFER_LIMIT_FOR_32_BIT) { | |
279 | b = memdup(buffer, sizeof(struct auxtrace_buffer)); | |
280 | if (!b) | |
281 | return -ENOMEM; | |
282 | b->size = BUFFER_LIMIT_FOR_32_BIT; | |
283 | b->consecutive = consecutive; | |
284 | err = auxtrace_queues__add_buffer(queues, idx, b); | |
285 | if (err) { | |
286 | auxtrace_buffer__free(b); | |
287 | return err; | |
288 | } | |
289 | buffer->data_offset += BUFFER_LIMIT_FOR_32_BIT; | |
290 | sz -= BUFFER_LIMIT_FOR_32_BIT; | |
291 | consecutive = true; | |
292 | } | |
293 | ||
294 | buffer->size = sz; | |
295 | buffer->consecutive = consecutive; | |
296 | ||
297 | return 0; | |
298 | } | |
299 | ||
300 | static int auxtrace_queues__add_event_buffer(struct auxtrace_queues *queues, | |
301 | struct perf_session *session, | |
302 | unsigned int idx, | |
303 | struct auxtrace_buffer *buffer) | |
304 | { | |
305 | if (session->one_mmap) { | |
306 | buffer->data = buffer->data_offset - session->one_mmap_offset + | |
307 | session->one_mmap_addr; | |
308 | } else if (perf_data_file__is_pipe(session->file)) { | |
309 | buffer->data = auxtrace_copy_data(buffer->size, session); | |
310 | if (!buffer->data) | |
311 | return -ENOMEM; | |
312 | buffer->data_needs_freeing = true; | |
313 | } else if (BITS_PER_LONG == 32 && | |
314 | buffer->size > BUFFER_LIMIT_FOR_32_BIT) { | |
315 | int err; | |
316 | ||
317 | err = auxtrace_queues__split_buffer(queues, idx, buffer); | |
318 | if (err) | |
319 | return err; | |
320 | } | |
321 | ||
322 | return auxtrace_queues__add_buffer(queues, idx, buffer); | |
323 | } | |
324 | ||
325 | int auxtrace_queues__add_event(struct auxtrace_queues *queues, | |
326 | struct perf_session *session, | |
327 | union perf_event *event, off_t data_offset, | |
328 | struct auxtrace_buffer **buffer_ptr) | |
329 | { | |
330 | struct auxtrace_buffer *buffer; | |
331 | unsigned int idx; | |
332 | int err; | |
333 | ||
334 | buffer = zalloc(sizeof(struct auxtrace_buffer)); | |
335 | if (!buffer) | |
336 | return -ENOMEM; | |
337 | ||
338 | buffer->pid = -1; | |
339 | buffer->tid = event->auxtrace.tid; | |
340 | buffer->cpu = event->auxtrace.cpu; | |
341 | buffer->data_offset = data_offset; | |
342 | buffer->offset = event->auxtrace.offset; | |
343 | buffer->reference = event->auxtrace.reference; | |
344 | buffer->size = event->auxtrace.size; | |
345 | idx = event->auxtrace.idx; | |
346 | ||
347 | err = auxtrace_queues__add_event_buffer(queues, session, idx, buffer); | |
348 | if (err) | |
349 | goto out_err; | |
350 | ||
351 | if (buffer_ptr) | |
352 | *buffer_ptr = buffer; | |
353 | ||
354 | return 0; | |
355 | ||
356 | out_err: | |
357 | auxtrace_buffer__free(buffer); | |
358 | return err; | |
359 | } | |
360 | ||
99fa2984 AH |
361 | static int auxtrace_queues__add_indexed_event(struct auxtrace_queues *queues, |
362 | struct perf_session *session, | |
363 | off_t file_offset, size_t sz) | |
364 | { | |
365 | union perf_event *event; | |
366 | int err; | |
367 | char buf[PERF_SAMPLE_MAX_SIZE]; | |
368 | ||
369 | err = perf_session__peek_event(session, file_offset, buf, | |
370 | PERF_SAMPLE_MAX_SIZE, &event, NULL); | |
371 | if (err) | |
372 | return err; | |
373 | ||
374 | if (event->header.type == PERF_RECORD_AUXTRACE) { | |
375 | if (event->header.size < sizeof(struct auxtrace_event) || | |
376 | event->header.size != sz) { | |
377 | err = -EINVAL; | |
378 | goto out; | |
379 | } | |
380 | file_offset += event->header.size; | |
381 | err = auxtrace_queues__add_event(queues, session, event, | |
382 | file_offset, NULL); | |
383 | } | |
384 | out: | |
385 | return err; | |
386 | } | |
387 | ||
e5027893 AH |
388 | void auxtrace_queues__free(struct auxtrace_queues *queues) |
389 | { | |
390 | unsigned int i; | |
391 | ||
392 | for (i = 0; i < queues->nr_queues; i++) { | |
393 | while (!list_empty(&queues->queue_array[i].head)) { | |
394 | struct auxtrace_buffer *buffer; | |
395 | ||
396 | buffer = list_entry(queues->queue_array[i].head.next, | |
397 | struct auxtrace_buffer, list); | |
398 | list_del(&buffer->list); | |
399 | auxtrace_buffer__free(buffer); | |
400 | } | |
401 | } | |
402 | ||
403 | zfree(&queues->queue_array); | |
404 | queues->nr_queues = 0; | |
405 | } | |
406 | ||
f9397155 AH |
407 | static void auxtrace_heapify(struct auxtrace_heap_item *heap_array, |
408 | unsigned int pos, unsigned int queue_nr, | |
409 | u64 ordinal) | |
410 | { | |
411 | unsigned int parent; | |
412 | ||
413 | while (pos) { | |
414 | parent = (pos - 1) >> 1; | |
415 | if (heap_array[parent].ordinal <= ordinal) | |
416 | break; | |
417 | heap_array[pos] = heap_array[parent]; | |
418 | pos = parent; | |
419 | } | |
420 | heap_array[pos].queue_nr = queue_nr; | |
421 | heap_array[pos].ordinal = ordinal; | |
422 | } | |
423 | ||
424 | int auxtrace_heap__add(struct auxtrace_heap *heap, unsigned int queue_nr, | |
425 | u64 ordinal) | |
426 | { | |
427 | struct auxtrace_heap_item *heap_array; | |
428 | ||
429 | if (queue_nr >= heap->heap_sz) { | |
430 | unsigned int heap_sz = AUXTRACE_INIT_NR_QUEUES; | |
431 | ||
432 | while (heap_sz <= queue_nr) | |
433 | heap_sz <<= 1; | |
434 | heap_array = realloc(heap->heap_array, | |
435 | heap_sz * sizeof(struct auxtrace_heap_item)); | |
436 | if (!heap_array) | |
437 | return -ENOMEM; | |
438 | heap->heap_array = heap_array; | |
439 | heap->heap_sz = heap_sz; | |
440 | } | |
441 | ||
442 | auxtrace_heapify(heap->heap_array, heap->heap_cnt++, queue_nr, ordinal); | |
443 | ||
444 | return 0; | |
445 | } | |
446 | ||
447 | void auxtrace_heap__free(struct auxtrace_heap *heap) | |
448 | { | |
449 | zfree(&heap->heap_array); | |
450 | heap->heap_cnt = 0; | |
451 | heap->heap_sz = 0; | |
452 | } | |
453 | ||
454 | void auxtrace_heap__pop(struct auxtrace_heap *heap) | |
455 | { | |
456 | unsigned int pos, last, heap_cnt = heap->heap_cnt; | |
457 | struct auxtrace_heap_item *heap_array; | |
458 | ||
459 | if (!heap_cnt) | |
460 | return; | |
461 | ||
462 | heap->heap_cnt -= 1; | |
463 | ||
464 | heap_array = heap->heap_array; | |
465 | ||
466 | pos = 0; | |
467 | while (1) { | |
468 | unsigned int left, right; | |
469 | ||
470 | left = (pos << 1) + 1; | |
471 | if (left >= heap_cnt) | |
472 | break; | |
473 | right = left + 1; | |
474 | if (right >= heap_cnt) { | |
475 | heap_array[pos] = heap_array[left]; | |
476 | return; | |
477 | } | |
478 | if (heap_array[left].ordinal < heap_array[right].ordinal) { | |
479 | heap_array[pos] = heap_array[left]; | |
480 | pos = left; | |
481 | } else { | |
482 | heap_array[pos] = heap_array[right]; | |
483 | pos = right; | |
484 | } | |
485 | } | |
486 | ||
487 | last = heap_cnt - 1; | |
488 | auxtrace_heapify(heap_array, pos, heap_array[last].queue_nr, | |
489 | heap_array[last].ordinal); | |
490 | } | |
491 | ||
14a05e13 MP |
492 | size_t auxtrace_record__info_priv_size(struct auxtrace_record *itr, |
493 | struct perf_evlist *evlist) | |
9e0cc4fe AH |
494 | { |
495 | if (itr) | |
14a05e13 | 496 | return itr->info_priv_size(itr, evlist); |
9e0cc4fe AH |
497 | return 0; |
498 | } | |
499 | ||
500 | static int auxtrace_not_supported(void) | |
501 | { | |
502 | pr_err("AUX area tracing is not supported on this architecture\n"); | |
503 | return -EINVAL; | |
504 | } | |
505 | ||
506 | int auxtrace_record__info_fill(struct auxtrace_record *itr, | |
507 | struct perf_session *session, | |
508 | struct auxtrace_info_event *auxtrace_info, | |
509 | size_t priv_size) | |
510 | { | |
511 | if (itr) | |
512 | return itr->info_fill(itr, session, auxtrace_info, priv_size); | |
513 | return auxtrace_not_supported(); | |
514 | } | |
515 | ||
516 | void auxtrace_record__free(struct auxtrace_record *itr) | |
517 | { | |
518 | if (itr) | |
519 | itr->free(itr); | |
520 | } | |
521 | ||
d20031bb AH |
522 | int auxtrace_record__snapshot_start(struct auxtrace_record *itr) |
523 | { | |
524 | if (itr && itr->snapshot_start) | |
525 | return itr->snapshot_start(itr); | |
526 | return 0; | |
527 | } | |
528 | ||
529 | int auxtrace_record__snapshot_finish(struct auxtrace_record *itr) | |
530 | { | |
531 | if (itr && itr->snapshot_finish) | |
532 | return itr->snapshot_finish(itr); | |
533 | return 0; | |
534 | } | |
535 | ||
536 | int auxtrace_record__find_snapshot(struct auxtrace_record *itr, int idx, | |
537 | struct auxtrace_mmap *mm, | |
538 | unsigned char *data, u64 *head, u64 *old) | |
539 | { | |
540 | if (itr && itr->find_snapshot) | |
541 | return itr->find_snapshot(itr, idx, mm, data, head, old); | |
542 | return 0; | |
543 | } | |
544 | ||
9e0cc4fe AH |
545 | int auxtrace_record__options(struct auxtrace_record *itr, |
546 | struct perf_evlist *evlist, | |
547 | struct record_opts *opts) | |
548 | { | |
549 | if (itr) | |
550 | return itr->recording_options(itr, evlist, opts); | |
551 | return 0; | |
552 | } | |
553 | ||
554 | u64 auxtrace_record__reference(struct auxtrace_record *itr) | |
555 | { | |
556 | if (itr) | |
557 | return itr->reference(itr); | |
558 | return 0; | |
559 | } | |
560 | ||
d20031bb AH |
561 | int auxtrace_parse_snapshot_options(struct auxtrace_record *itr, |
562 | struct record_opts *opts, const char *str) | |
563 | { | |
564 | if (!str) | |
565 | return 0; | |
566 | ||
567 | if (itr) | |
568 | return itr->parse_snapshot_options(itr, opts, str); | |
569 | ||
570 | pr_err("No AUX area tracing to snapshot\n"); | |
571 | return -EINVAL; | |
572 | } | |
573 | ||
9e0cc4fe AH |
574 | struct auxtrace_record *__weak |
575 | auxtrace_record__init(struct perf_evlist *evlist __maybe_unused, int *err) | |
576 | { | |
577 | *err = 0; | |
578 | return NULL; | |
579 | } | |
580 | ||
99fa2984 AH |
581 | static int auxtrace_index__alloc(struct list_head *head) |
582 | { | |
583 | struct auxtrace_index *auxtrace_index; | |
584 | ||
585 | auxtrace_index = malloc(sizeof(struct auxtrace_index)); | |
586 | if (!auxtrace_index) | |
587 | return -ENOMEM; | |
588 | ||
589 | auxtrace_index->nr = 0; | |
590 | INIT_LIST_HEAD(&auxtrace_index->list); | |
591 | ||
592 | list_add_tail(&auxtrace_index->list, head); | |
593 | ||
594 | return 0; | |
595 | } | |
596 | ||
597 | void auxtrace_index__free(struct list_head *head) | |
598 | { | |
599 | struct auxtrace_index *auxtrace_index, *n; | |
600 | ||
601 | list_for_each_entry_safe(auxtrace_index, n, head, list) { | |
602 | list_del(&auxtrace_index->list); | |
603 | free(auxtrace_index); | |
604 | } | |
605 | } | |
606 | ||
607 | static struct auxtrace_index *auxtrace_index__last(struct list_head *head) | |
608 | { | |
609 | struct auxtrace_index *auxtrace_index; | |
610 | int err; | |
611 | ||
612 | if (list_empty(head)) { | |
613 | err = auxtrace_index__alloc(head); | |
614 | if (err) | |
615 | return NULL; | |
616 | } | |
617 | ||
618 | auxtrace_index = list_entry(head->prev, struct auxtrace_index, list); | |
619 | ||
620 | if (auxtrace_index->nr >= PERF_AUXTRACE_INDEX_ENTRY_COUNT) { | |
621 | err = auxtrace_index__alloc(head); | |
622 | if (err) | |
623 | return NULL; | |
624 | auxtrace_index = list_entry(head->prev, struct auxtrace_index, | |
625 | list); | |
626 | } | |
627 | ||
628 | return auxtrace_index; | |
629 | } | |
630 | ||
631 | int auxtrace_index__auxtrace_event(struct list_head *head, | |
632 | union perf_event *event, off_t file_offset) | |
633 | { | |
634 | struct auxtrace_index *auxtrace_index; | |
635 | size_t nr; | |
636 | ||
637 | auxtrace_index = auxtrace_index__last(head); | |
638 | if (!auxtrace_index) | |
639 | return -ENOMEM; | |
640 | ||
641 | nr = auxtrace_index->nr; | |
642 | auxtrace_index->entries[nr].file_offset = file_offset; | |
643 | auxtrace_index->entries[nr].sz = event->header.size; | |
644 | auxtrace_index->nr += 1; | |
645 | ||
646 | return 0; | |
647 | } | |
648 | ||
649 | static int auxtrace_index__do_write(int fd, | |
650 | struct auxtrace_index *auxtrace_index) | |
651 | { | |
652 | struct auxtrace_index_entry ent; | |
653 | size_t i; | |
654 | ||
655 | for (i = 0; i < auxtrace_index->nr; i++) { | |
656 | ent.file_offset = auxtrace_index->entries[i].file_offset; | |
657 | ent.sz = auxtrace_index->entries[i].sz; | |
658 | if (writen(fd, &ent, sizeof(ent)) != sizeof(ent)) | |
659 | return -errno; | |
660 | } | |
661 | return 0; | |
662 | } | |
663 | ||
664 | int auxtrace_index__write(int fd, struct list_head *head) | |
665 | { | |
666 | struct auxtrace_index *auxtrace_index; | |
667 | u64 total = 0; | |
668 | int err; | |
669 | ||
670 | list_for_each_entry(auxtrace_index, head, list) | |
671 | total += auxtrace_index->nr; | |
672 | ||
673 | if (writen(fd, &total, sizeof(total)) != sizeof(total)) | |
674 | return -errno; | |
675 | ||
676 | list_for_each_entry(auxtrace_index, head, list) { | |
677 | err = auxtrace_index__do_write(fd, auxtrace_index); | |
678 | if (err) | |
679 | return err; | |
680 | } | |
681 | ||
682 | return 0; | |
683 | } | |
684 | ||
685 | static int auxtrace_index__process_entry(int fd, struct list_head *head, | |
686 | bool needs_swap) | |
687 | { | |
688 | struct auxtrace_index *auxtrace_index; | |
689 | struct auxtrace_index_entry ent; | |
690 | size_t nr; | |
691 | ||
692 | if (readn(fd, &ent, sizeof(ent)) != sizeof(ent)) | |
693 | return -1; | |
694 | ||
695 | auxtrace_index = auxtrace_index__last(head); | |
696 | if (!auxtrace_index) | |
697 | return -1; | |
698 | ||
699 | nr = auxtrace_index->nr; | |
700 | if (needs_swap) { | |
701 | auxtrace_index->entries[nr].file_offset = | |
702 | bswap_64(ent.file_offset); | |
703 | auxtrace_index->entries[nr].sz = bswap_64(ent.sz); | |
704 | } else { | |
705 | auxtrace_index->entries[nr].file_offset = ent.file_offset; | |
706 | auxtrace_index->entries[nr].sz = ent.sz; | |
707 | } | |
708 | ||
709 | auxtrace_index->nr = nr + 1; | |
710 | ||
711 | return 0; | |
712 | } | |
713 | ||
714 | int auxtrace_index__process(int fd, u64 size, struct perf_session *session, | |
715 | bool needs_swap) | |
716 | { | |
717 | struct list_head *head = &session->auxtrace_index; | |
718 | u64 nr; | |
719 | ||
720 | if (readn(fd, &nr, sizeof(u64)) != sizeof(u64)) | |
721 | return -1; | |
722 | ||
723 | if (needs_swap) | |
724 | nr = bswap_64(nr); | |
725 | ||
726 | if (sizeof(u64) + nr * sizeof(struct auxtrace_index_entry) > size) | |
727 | return -1; | |
728 | ||
729 | while (nr--) { | |
730 | int err; | |
731 | ||
732 | err = auxtrace_index__process_entry(fd, head, needs_swap); | |
733 | if (err) | |
734 | return -1; | |
735 | } | |
736 | ||
737 | return 0; | |
738 | } | |
739 | ||
740 | static int auxtrace_queues__process_index_entry(struct auxtrace_queues *queues, | |
741 | struct perf_session *session, | |
742 | struct auxtrace_index_entry *ent) | |
743 | { | |
744 | return auxtrace_queues__add_indexed_event(queues, session, | |
745 | ent->file_offset, ent->sz); | |
746 | } | |
747 | ||
748 | int auxtrace_queues__process_index(struct auxtrace_queues *queues, | |
749 | struct perf_session *session) | |
750 | { | |
751 | struct auxtrace_index *auxtrace_index; | |
752 | struct auxtrace_index_entry *ent; | |
753 | size_t i; | |
754 | int err; | |
755 | ||
756 | list_for_each_entry(auxtrace_index, &session->auxtrace_index, list) { | |
757 | for (i = 0; i < auxtrace_index->nr; i++) { | |
758 | ent = &auxtrace_index->entries[i]; | |
759 | err = auxtrace_queues__process_index_entry(queues, | |
760 | session, | |
761 | ent); | |
762 | if (err) | |
763 | return err; | |
764 | } | |
765 | } | |
766 | return 0; | |
767 | } | |
768 | ||
e5027893 AH |
769 | struct auxtrace_buffer *auxtrace_buffer__next(struct auxtrace_queue *queue, |
770 | struct auxtrace_buffer *buffer) | |
771 | { | |
772 | if (buffer) { | |
773 | if (list_is_last(&buffer->list, &queue->head)) | |
774 | return NULL; | |
775 | return list_entry(buffer->list.next, struct auxtrace_buffer, | |
776 | list); | |
777 | } else { | |
778 | if (list_empty(&queue->head)) | |
779 | return NULL; | |
780 | return list_entry(queue->head.next, struct auxtrace_buffer, | |
781 | list); | |
782 | } | |
783 | } | |
784 | ||
785 | void *auxtrace_buffer__get_data(struct auxtrace_buffer *buffer, int fd) | |
786 | { | |
787 | size_t adj = buffer->data_offset & (page_size - 1); | |
788 | size_t size = buffer->size + adj; | |
789 | off_t file_offset = buffer->data_offset - adj; | |
790 | void *addr; | |
791 | ||
792 | if (buffer->data) | |
793 | return buffer->data; | |
794 | ||
795 | addr = mmap(NULL, size, PROT_READ, MAP_SHARED, fd, file_offset); | |
796 | if (addr == MAP_FAILED) | |
797 | return NULL; | |
798 | ||
799 | buffer->mmap_addr = addr; | |
800 | buffer->mmap_size = size; | |
801 | ||
802 | buffer->data = addr + adj; | |
803 | ||
804 | return buffer->data; | |
805 | } | |
806 | ||
807 | void auxtrace_buffer__put_data(struct auxtrace_buffer *buffer) | |
808 | { | |
809 | if (!buffer->data || !buffer->mmap_addr) | |
810 | return; | |
811 | munmap(buffer->mmap_addr, buffer->mmap_size); | |
812 | buffer->mmap_addr = NULL; | |
813 | buffer->mmap_size = 0; | |
814 | buffer->data = NULL; | |
815 | buffer->use_data = NULL; | |
816 | } | |
817 | ||
818 | void auxtrace_buffer__drop_data(struct auxtrace_buffer *buffer) | |
819 | { | |
820 | auxtrace_buffer__put_data(buffer); | |
821 | if (buffer->data_needs_freeing) { | |
822 | buffer->data_needs_freeing = false; | |
823 | zfree(&buffer->data); | |
824 | buffer->use_data = NULL; | |
825 | buffer->size = 0; | |
826 | } | |
827 | } | |
828 | ||
829 | void auxtrace_buffer__free(struct auxtrace_buffer *buffer) | |
830 | { | |
831 | auxtrace_buffer__drop_data(buffer); | |
832 | free(buffer); | |
833 | } | |
834 | ||
85ed4729 AH |
835 | void auxtrace_synth_error(struct auxtrace_error_event *auxtrace_error, int type, |
836 | int code, int cpu, pid_t pid, pid_t tid, u64 ip, | |
837 | const char *msg) | |
838 | { | |
839 | size_t size; | |
840 | ||
841 | memset(auxtrace_error, 0, sizeof(struct auxtrace_error_event)); | |
842 | ||
843 | auxtrace_error->header.type = PERF_RECORD_AUXTRACE_ERROR; | |
844 | auxtrace_error->type = type; | |
845 | auxtrace_error->code = code; | |
846 | auxtrace_error->cpu = cpu; | |
847 | auxtrace_error->pid = pid; | |
848 | auxtrace_error->tid = tid; | |
849 | auxtrace_error->ip = ip; | |
850 | strlcpy(auxtrace_error->msg, msg, MAX_AUXTRACE_ERROR_MSG); | |
851 | ||
852 | size = (void *)auxtrace_error->msg - (void *)auxtrace_error + | |
853 | strlen(auxtrace_error->msg) + 1; | |
854 | auxtrace_error->header.size = PERF_ALIGN(size, sizeof(u64)); | |
855 | } | |
856 | ||
9e0cc4fe AH |
857 | int perf_event__synthesize_auxtrace_info(struct auxtrace_record *itr, |
858 | struct perf_tool *tool, | |
859 | struct perf_session *session, | |
860 | perf_event__handler_t process) | |
861 | { | |
862 | union perf_event *ev; | |
863 | size_t priv_size; | |
864 | int err; | |
865 | ||
866 | pr_debug2("Synthesizing auxtrace information\n"); | |
14a05e13 | 867 | priv_size = auxtrace_record__info_priv_size(itr, session->evlist); |
9e0cc4fe AH |
868 | ev = zalloc(sizeof(struct auxtrace_info_event) + priv_size); |
869 | if (!ev) | |
870 | return -ENOMEM; | |
871 | ||
872 | ev->auxtrace_info.header.type = PERF_RECORD_AUXTRACE_INFO; | |
873 | ev->auxtrace_info.header.size = sizeof(struct auxtrace_info_event) + | |
874 | priv_size; | |
875 | err = auxtrace_record__info_fill(itr, session, &ev->auxtrace_info, | |
876 | priv_size); | |
877 | if (err) | |
878 | goto out_free; | |
879 | ||
880 | err = process(tool, ev, NULL, NULL); | |
881 | out_free: | |
882 | free(ev); | |
883 | return err; | |
884 | } | |
885 | ||
73f75fb1 AH |
886 | static bool auxtrace__dont_decode(struct perf_session *session) |
887 | { | |
888 | return !session->itrace_synth_opts || | |
889 | session->itrace_synth_opts->dont_decode; | |
890 | } | |
891 | ||
892 | int perf_event__process_auxtrace_info(struct perf_tool *tool __maybe_unused, | |
893 | union perf_event *event, | |
5efb1d54 | 894 | struct perf_session *session) |
73f75fb1 AH |
895 | { |
896 | enum auxtrace_type type = event->auxtrace_info.type; | |
897 | ||
898 | if (dump_trace) | |
899 | fprintf(stdout, " type: %u\n", type); | |
900 | ||
901 | switch (type) { | |
55ea4ab4 | 902 | case PERF_AUXTRACE_INTEL_PT: |
5efb1d54 | 903 | return intel_pt_process_auxtrace_info(event, session); |
d0170af7 AH |
904 | case PERF_AUXTRACE_INTEL_BTS: |
905 | return intel_bts_process_auxtrace_info(event, session); | |
a818c563 | 906 | case PERF_AUXTRACE_CS_ETM: |
73f75fb1 AH |
907 | case PERF_AUXTRACE_UNKNOWN: |
908 | default: | |
909 | return -EINVAL; | |
910 | } | |
911 | } | |
912 | ||
913 | s64 perf_event__process_auxtrace(struct perf_tool *tool, | |
914 | union perf_event *event, | |
915 | struct perf_session *session) | |
916 | { | |
917 | s64 err; | |
918 | ||
919 | if (dump_trace) | |
920 | fprintf(stdout, " size: %#"PRIx64" offset: %#"PRIx64" ref: %#"PRIx64" idx: %u tid: %d cpu: %d\n", | |
921 | event->auxtrace.size, event->auxtrace.offset, | |
922 | event->auxtrace.reference, event->auxtrace.idx, | |
923 | event->auxtrace.tid, event->auxtrace.cpu); | |
924 | ||
925 | if (auxtrace__dont_decode(session)) | |
926 | return event->auxtrace.size; | |
927 | ||
928 | if (!session->auxtrace || event->header.type != PERF_RECORD_AUXTRACE) | |
929 | return -EINVAL; | |
930 | ||
931 | err = session->auxtrace->process_auxtrace_event(session, event, tool); | |
932 | if (err < 0) | |
933 | return err; | |
934 | ||
935 | return event->auxtrace.size; | |
936 | } | |
937 | ||
f6986c95 AH |
938 | #define PERF_ITRACE_DEFAULT_PERIOD_TYPE PERF_ITRACE_PERIOD_NANOSECS |
939 | #define PERF_ITRACE_DEFAULT_PERIOD 100000 | |
940 | #define PERF_ITRACE_DEFAULT_CALLCHAIN_SZ 16 | |
941 | #define PERF_ITRACE_MAX_CALLCHAIN_SZ 1024 | |
601897b5 AH |
942 | #define PERF_ITRACE_DEFAULT_LAST_BRANCH_SZ 64 |
943 | #define PERF_ITRACE_MAX_LAST_BRANCH_SZ 1024 | |
f6986c95 AH |
944 | |
945 | void itrace_synth_opts__set_default(struct itrace_synth_opts *synth_opts) | |
946 | { | |
947 | synth_opts->instructions = true; | |
948 | synth_opts->branches = true; | |
53c76b0e | 949 | synth_opts->transactions = true; |
f6986c95 AH |
950 | synth_opts->errors = true; |
951 | synth_opts->period_type = PERF_ITRACE_DEFAULT_PERIOD_TYPE; | |
952 | synth_opts->period = PERF_ITRACE_DEFAULT_PERIOD; | |
953 | synth_opts->callchain_sz = PERF_ITRACE_DEFAULT_CALLCHAIN_SZ; | |
601897b5 | 954 | synth_opts->last_branch_sz = PERF_ITRACE_DEFAULT_LAST_BRANCH_SZ; |
d1706b39 | 955 | synth_opts->initial_skip = 0; |
f6986c95 AH |
956 | } |
957 | ||
958 | /* | |
959 | * Please check tools/perf/Documentation/perf-script.txt for information | |
960 | * about the options parsed here, which is introduced after this cset, | |
961 | * when support in 'perf script' for these options is introduced. | |
962 | */ | |
963 | int itrace_parse_synth_opts(const struct option *opt, const char *str, | |
964 | int unset) | |
965 | { | |
966 | struct itrace_synth_opts *synth_opts = opt->value; | |
967 | const char *p; | |
968 | char *endptr; | |
f70cfa07 | 969 | bool period_type_set = false; |
e1791347 | 970 | bool period_set = false; |
f6986c95 AH |
971 | |
972 | synth_opts->set = true; | |
973 | ||
974 | if (unset) { | |
975 | synth_opts->dont_decode = true; | |
976 | return 0; | |
977 | } | |
978 | ||
979 | if (!str) { | |
980 | itrace_synth_opts__set_default(synth_opts); | |
981 | return 0; | |
982 | } | |
983 | ||
984 | for (p = str; *p;) { | |
985 | switch (*p++) { | |
986 | case 'i': | |
987 | synth_opts->instructions = true; | |
988 | while (*p == ' ' || *p == ',') | |
989 | p += 1; | |
990 | if (isdigit(*p)) { | |
991 | synth_opts->period = strtoull(p, &endptr, 10); | |
e1791347 | 992 | period_set = true; |
f6986c95 AH |
993 | p = endptr; |
994 | while (*p == ' ' || *p == ',') | |
995 | p += 1; | |
996 | switch (*p++) { | |
997 | case 'i': | |
998 | synth_opts->period_type = | |
999 | PERF_ITRACE_PERIOD_INSTRUCTIONS; | |
f70cfa07 | 1000 | period_type_set = true; |
f6986c95 AH |
1001 | break; |
1002 | case 't': | |
1003 | synth_opts->period_type = | |
1004 | PERF_ITRACE_PERIOD_TICKS; | |
f70cfa07 | 1005 | period_type_set = true; |
f6986c95 AH |
1006 | break; |
1007 | case 'm': | |
1008 | synth_opts->period *= 1000; | |
1009 | /* Fall through */ | |
1010 | case 'u': | |
1011 | synth_opts->period *= 1000; | |
1012 | /* Fall through */ | |
1013 | case 'n': | |
1014 | if (*p++ != 's') | |
1015 | goto out_err; | |
1016 | synth_opts->period_type = | |
1017 | PERF_ITRACE_PERIOD_NANOSECS; | |
f70cfa07 | 1018 | period_type_set = true; |
f6986c95 AH |
1019 | break; |
1020 | case '\0': | |
1021 | goto out; | |
1022 | default: | |
1023 | goto out_err; | |
1024 | } | |
1025 | } | |
1026 | break; | |
1027 | case 'b': | |
1028 | synth_opts->branches = true; | |
1029 | break; | |
53c76b0e AH |
1030 | case 'x': |
1031 | synth_opts->transactions = true; | |
1032 | break; | |
f6986c95 AH |
1033 | case 'e': |
1034 | synth_opts->errors = true; | |
1035 | break; | |
1036 | case 'd': | |
1037 | synth_opts->log = true; | |
1038 | break; | |
1039 | case 'c': | |
1040 | synth_opts->branches = true; | |
1041 | synth_opts->calls = true; | |
1042 | break; | |
1043 | case 'r': | |
1044 | synth_opts->branches = true; | |
1045 | synth_opts->returns = true; | |
1046 | break; | |
1047 | case 'g': | |
f6986c95 AH |
1048 | synth_opts->callchain = true; |
1049 | synth_opts->callchain_sz = | |
1050 | PERF_ITRACE_DEFAULT_CALLCHAIN_SZ; | |
1051 | while (*p == ' ' || *p == ',') | |
1052 | p += 1; | |
1053 | if (isdigit(*p)) { | |
1054 | unsigned int val; | |
1055 | ||
1056 | val = strtoul(p, &endptr, 10); | |
1057 | p = endptr; | |
1058 | if (!val || val > PERF_ITRACE_MAX_CALLCHAIN_SZ) | |
1059 | goto out_err; | |
1060 | synth_opts->callchain_sz = val; | |
1061 | } | |
1062 | break; | |
601897b5 AH |
1063 | case 'l': |
1064 | synth_opts->last_branch = true; | |
1065 | synth_opts->last_branch_sz = | |
1066 | PERF_ITRACE_DEFAULT_LAST_BRANCH_SZ; | |
1067 | while (*p == ' ' || *p == ',') | |
1068 | p += 1; | |
1069 | if (isdigit(*p)) { | |
1070 | unsigned int val; | |
1071 | ||
1072 | val = strtoul(p, &endptr, 10); | |
1073 | p = endptr; | |
1074 | if (!val || | |
1075 | val > PERF_ITRACE_MAX_LAST_BRANCH_SZ) | |
1076 | goto out_err; | |
1077 | synth_opts->last_branch_sz = val; | |
1078 | } | |
1079 | break; | |
d1706b39 AK |
1080 | case 's': |
1081 | synth_opts->initial_skip = strtoul(p, &endptr, 10); | |
1082 | if (p == endptr) | |
1083 | goto out_err; | |
1084 | p = endptr; | |
1085 | break; | |
f6986c95 AH |
1086 | case ' ': |
1087 | case ',': | |
1088 | break; | |
1089 | default: | |
1090 | goto out_err; | |
1091 | } | |
1092 | } | |
1093 | out: | |
1094 | if (synth_opts->instructions) { | |
f70cfa07 | 1095 | if (!period_type_set) |
f6986c95 AH |
1096 | synth_opts->period_type = |
1097 | PERF_ITRACE_DEFAULT_PERIOD_TYPE; | |
e1791347 | 1098 | if (!period_set) |
f6986c95 AH |
1099 | synth_opts->period = PERF_ITRACE_DEFAULT_PERIOD; |
1100 | } | |
1101 | ||
1102 | return 0; | |
1103 | ||
1104 | out_err: | |
1105 | pr_err("Bad Instruction Tracing options '%s'\n", str); | |
1106 | return -EINVAL; | |
1107 | } | |
1108 | ||
85ed4729 AH |
1109 | static const char * const auxtrace_error_type_name[] = { |
1110 | [PERF_AUXTRACE_ERROR_ITRACE] = "instruction trace", | |
1111 | }; | |
1112 | ||
1113 | static const char *auxtrace_error_name(int type) | |
1114 | { | |
1115 | const char *error_type_name = NULL; | |
1116 | ||
1117 | if (type < PERF_AUXTRACE_ERROR_MAX) | |
1118 | error_type_name = auxtrace_error_type_name[type]; | |
1119 | if (!error_type_name) | |
1120 | error_type_name = "unknown AUX"; | |
1121 | return error_type_name; | |
1122 | } | |
1123 | ||
1124 | size_t perf_event__fprintf_auxtrace_error(union perf_event *event, FILE *fp) | |
1125 | { | |
1126 | struct auxtrace_error_event *e = &event->auxtrace_error; | |
1127 | int ret; | |
1128 | ||
1129 | ret = fprintf(fp, " %s error type %u", | |
1130 | auxtrace_error_name(e->type), e->type); | |
1131 | ret += fprintf(fp, " cpu %d pid %d tid %d ip %#"PRIx64" code %u: %s\n", | |
1132 | e->cpu, e->pid, e->tid, e->ip, e->code, e->msg); | |
1133 | return ret; | |
1134 | } | |
1135 | ||
1136 | void perf_session__auxtrace_error_inc(struct perf_session *session, | |
1137 | union perf_event *event) | |
1138 | { | |
1139 | struct auxtrace_error_event *e = &event->auxtrace_error; | |
1140 | ||
1141 | if (e->type < PERF_AUXTRACE_ERROR_MAX) | |
1142 | session->evlist->stats.nr_auxtrace_errors[e->type] += 1; | |
1143 | } | |
1144 | ||
1145 | void events_stats__auxtrace_error_warn(const struct events_stats *stats) | |
1146 | { | |
1147 | int i; | |
1148 | ||
1149 | for (i = 0; i < PERF_AUXTRACE_ERROR_MAX; i++) { | |
1150 | if (!stats->nr_auxtrace_errors[i]) | |
1151 | continue; | |
1152 | ui__warning("%u %s errors\n", | |
1153 | stats->nr_auxtrace_errors[i], | |
1154 | auxtrace_error_name(i)); | |
1155 | } | |
1156 | } | |
1157 | ||
1158 | int perf_event__process_auxtrace_error(struct perf_tool *tool __maybe_unused, | |
1159 | union perf_event *event, | |
73f75fb1 | 1160 | struct perf_session *session) |
85ed4729 | 1161 | { |
73f75fb1 AH |
1162 | if (auxtrace__dont_decode(session)) |
1163 | return 0; | |
1164 | ||
85ed4729 AH |
1165 | perf_event__fprintf_auxtrace_error(event, stdout); |
1166 | return 0; | |
1167 | } | |
1168 | ||
d20031bb AH |
1169 | static int __auxtrace_mmap__read(struct auxtrace_mmap *mm, |
1170 | struct auxtrace_record *itr, | |
1171 | struct perf_tool *tool, process_auxtrace_t fn, | |
1172 | bool snapshot, size_t snapshot_size) | |
9e0cc4fe | 1173 | { |
d20031bb | 1174 | u64 head, old = mm->prev, offset, ref; |
9e0cc4fe AH |
1175 | unsigned char *data = mm->base; |
1176 | size_t size, head_off, old_off, len1, len2, padding; | |
1177 | union perf_event ev; | |
1178 | void *data1, *data2; | |
1179 | ||
d20031bb AH |
1180 | if (snapshot) { |
1181 | head = auxtrace_mmap__read_snapshot_head(mm); | |
1182 | if (auxtrace_record__find_snapshot(itr, mm->idx, mm, data, | |
1183 | &head, &old)) | |
1184 | return -1; | |
1185 | } else { | |
1186 | head = auxtrace_mmap__read_head(mm); | |
1187 | } | |
1188 | ||
9e0cc4fe AH |
1189 | if (old == head) |
1190 | return 0; | |
1191 | ||
1192 | pr_debug3("auxtrace idx %d old %#"PRIx64" head %#"PRIx64" diff %#"PRIx64"\n", | |
1193 | mm->idx, old, head, head - old); | |
1194 | ||
1195 | if (mm->mask) { | |
1196 | head_off = head & mm->mask; | |
1197 | old_off = old & mm->mask; | |
1198 | } else { | |
1199 | head_off = head % mm->len; | |
1200 | old_off = old % mm->len; | |
1201 | } | |
1202 | ||
1203 | if (head_off > old_off) | |
1204 | size = head_off - old_off; | |
1205 | else | |
1206 | size = mm->len - (old_off - head_off); | |
1207 | ||
d20031bb AH |
1208 | if (snapshot && size > snapshot_size) |
1209 | size = snapshot_size; | |
1210 | ||
9e0cc4fe AH |
1211 | ref = auxtrace_record__reference(itr); |
1212 | ||
1213 | if (head > old || size <= head || mm->mask) { | |
1214 | offset = head - size; | |
1215 | } else { | |
1216 | /* | |
1217 | * When the buffer size is not a power of 2, 'head' wraps at the | |
1218 | * highest multiple of the buffer size, so we have to subtract | |
1219 | * the remainder here. | |
1220 | */ | |
1221 | u64 rem = (0ULL - mm->len) % mm->len; | |
1222 | ||
1223 | offset = head - size - rem; | |
1224 | } | |
1225 | ||
1226 | if (size > head_off) { | |
1227 | len1 = size - head_off; | |
1228 | data1 = &data[mm->len - len1]; | |
1229 | len2 = head_off; | |
1230 | data2 = &data[0]; | |
1231 | } else { | |
1232 | len1 = size; | |
1233 | data1 = &data[head_off - len1]; | |
1234 | len2 = 0; | |
1235 | data2 = NULL; | |
1236 | } | |
1237 | ||
83b2ea25 AH |
1238 | if (itr->alignment) { |
1239 | unsigned int unwanted = len1 % itr->alignment; | |
1240 | ||
1241 | len1 -= unwanted; | |
1242 | size -= unwanted; | |
1243 | } | |
1244 | ||
9e0cc4fe AH |
1245 | /* padding must be written by fn() e.g. record__process_auxtrace() */ |
1246 | padding = size & 7; | |
1247 | if (padding) | |
1248 | padding = 8 - padding; | |
1249 | ||
1250 | memset(&ev, 0, sizeof(ev)); | |
1251 | ev.auxtrace.header.type = PERF_RECORD_AUXTRACE; | |
1252 | ev.auxtrace.header.size = sizeof(ev.auxtrace); | |
1253 | ev.auxtrace.size = size + padding; | |
1254 | ev.auxtrace.offset = offset; | |
1255 | ev.auxtrace.reference = ref; | |
1256 | ev.auxtrace.idx = mm->idx; | |
1257 | ev.auxtrace.tid = mm->tid; | |
1258 | ev.auxtrace.cpu = mm->cpu; | |
1259 | ||
1260 | if (fn(tool, &ev, data1, len1, data2, len2)) | |
1261 | return -1; | |
1262 | ||
1263 | mm->prev = head; | |
1264 | ||
d20031bb AH |
1265 | if (!snapshot) { |
1266 | auxtrace_mmap__write_tail(mm, head); | |
1267 | if (itr->read_finish) { | |
1268 | int err; | |
9e0cc4fe | 1269 | |
d20031bb AH |
1270 | err = itr->read_finish(itr, mm->idx); |
1271 | if (err < 0) | |
1272 | return err; | |
1273 | } | |
9e0cc4fe AH |
1274 | } |
1275 | ||
1276 | return 1; | |
1277 | } | |
c3278f02 | 1278 | |
d20031bb AH |
1279 | int auxtrace_mmap__read(struct auxtrace_mmap *mm, struct auxtrace_record *itr, |
1280 | struct perf_tool *tool, process_auxtrace_t fn) | |
1281 | { | |
1282 | return __auxtrace_mmap__read(mm, itr, tool, fn, false, 0); | |
1283 | } | |
1284 | ||
1285 | int auxtrace_mmap__read_snapshot(struct auxtrace_mmap *mm, | |
1286 | struct auxtrace_record *itr, | |
1287 | struct perf_tool *tool, process_auxtrace_t fn, | |
1288 | size_t snapshot_size) | |
1289 | { | |
1290 | return __auxtrace_mmap__read(mm, itr, tool, fn, true, snapshot_size); | |
1291 | } | |
1292 | ||
c3278f02 AH |
1293 | /** |
1294 | * struct auxtrace_cache - hash table to implement a cache | |
1295 | * @hashtable: the hashtable | |
1296 | * @sz: hashtable size (number of hlists) | |
1297 | * @entry_size: size of an entry | |
1298 | * @limit: limit the number of entries to this maximum, when reached the cache | |
1299 | * is dropped and caching begins again with an empty cache | |
1300 | * @cnt: current number of entries | |
1301 | * @bits: hashtable size (@sz = 2^@bits) | |
1302 | */ | |
1303 | struct auxtrace_cache { | |
1304 | struct hlist_head *hashtable; | |
1305 | size_t sz; | |
1306 | size_t entry_size; | |
1307 | size_t limit; | |
1308 | size_t cnt; | |
1309 | unsigned int bits; | |
1310 | }; | |
1311 | ||
1312 | struct auxtrace_cache *auxtrace_cache__new(unsigned int bits, size_t entry_size, | |
1313 | unsigned int limit_percent) | |
1314 | { | |
1315 | struct auxtrace_cache *c; | |
1316 | struct hlist_head *ht; | |
1317 | size_t sz, i; | |
1318 | ||
1319 | c = zalloc(sizeof(struct auxtrace_cache)); | |
1320 | if (!c) | |
1321 | return NULL; | |
1322 | ||
1323 | sz = 1UL << bits; | |
1324 | ||
1325 | ht = calloc(sz, sizeof(struct hlist_head)); | |
1326 | if (!ht) | |
1327 | goto out_free; | |
1328 | ||
1329 | for (i = 0; i < sz; i++) | |
1330 | INIT_HLIST_HEAD(&ht[i]); | |
1331 | ||
1332 | c->hashtable = ht; | |
1333 | c->sz = sz; | |
1334 | c->entry_size = entry_size; | |
1335 | c->limit = (c->sz * limit_percent) / 100; | |
1336 | c->bits = bits; | |
1337 | ||
1338 | return c; | |
1339 | ||
1340 | out_free: | |
1341 | free(c); | |
1342 | return NULL; | |
1343 | } | |
1344 | ||
1345 | static void auxtrace_cache__drop(struct auxtrace_cache *c) | |
1346 | { | |
1347 | struct auxtrace_cache_entry *entry; | |
1348 | struct hlist_node *tmp; | |
1349 | size_t i; | |
1350 | ||
1351 | if (!c) | |
1352 | return; | |
1353 | ||
1354 | for (i = 0; i < c->sz; i++) { | |
1355 | hlist_for_each_entry_safe(entry, tmp, &c->hashtable[i], hash) { | |
1356 | hlist_del(&entry->hash); | |
1357 | auxtrace_cache__free_entry(c, entry); | |
1358 | } | |
1359 | } | |
1360 | ||
1361 | c->cnt = 0; | |
1362 | } | |
1363 | ||
1364 | void auxtrace_cache__free(struct auxtrace_cache *c) | |
1365 | { | |
1366 | if (!c) | |
1367 | return; | |
1368 | ||
1369 | auxtrace_cache__drop(c); | |
1370 | free(c->hashtable); | |
1371 | free(c); | |
1372 | } | |
1373 | ||
1374 | void *auxtrace_cache__alloc_entry(struct auxtrace_cache *c) | |
1375 | { | |
1376 | return malloc(c->entry_size); | |
1377 | } | |
1378 | ||
1379 | void auxtrace_cache__free_entry(struct auxtrace_cache *c __maybe_unused, | |
1380 | void *entry) | |
1381 | { | |
1382 | free(entry); | |
1383 | } | |
1384 | ||
1385 | int auxtrace_cache__add(struct auxtrace_cache *c, u32 key, | |
1386 | struct auxtrace_cache_entry *entry) | |
1387 | { | |
1388 | if (c->limit && ++c->cnt > c->limit) | |
1389 | auxtrace_cache__drop(c); | |
1390 | ||
1391 | entry->key = key; | |
1392 | hlist_add_head(&entry->hash, &c->hashtable[hash_32(key, c->bits)]); | |
1393 | ||
1394 | return 0; | |
1395 | } | |
1396 | ||
1397 | void *auxtrace_cache__lookup(struct auxtrace_cache *c, u32 key) | |
1398 | { | |
1399 | struct auxtrace_cache_entry *entry; | |
1400 | struct hlist_head *hlist; | |
1401 | ||
1402 | if (!c) | |
1403 | return NULL; | |
1404 | ||
1405 | hlist = &c->hashtable[hash_32(key, c->bits)]; | |
1406 | hlist_for_each_entry(entry, hlist, hash) { | |
1407 | if (entry->key == key) | |
1408 | return entry; | |
1409 | } | |
1410 | ||
1411 | return NULL; | |
1412 | } | |
1b36c03e AH |
1413 | |
1414 | static void addr_filter__free_str(struct addr_filter *filt) | |
1415 | { | |
1416 | free(filt->str); | |
1417 | filt->action = NULL; | |
1418 | filt->sym_from = NULL; | |
1419 | filt->sym_to = NULL; | |
1420 | filt->filename = NULL; | |
1421 | filt->str = NULL; | |
1422 | } | |
1423 | ||
1424 | static struct addr_filter *addr_filter__new(void) | |
1425 | { | |
1426 | struct addr_filter *filt = zalloc(sizeof(*filt)); | |
1427 | ||
1428 | if (filt) | |
1429 | INIT_LIST_HEAD(&filt->list); | |
1430 | ||
1431 | return filt; | |
1432 | } | |
1433 | ||
1434 | static void addr_filter__free(struct addr_filter *filt) | |
1435 | { | |
1436 | if (filt) | |
1437 | addr_filter__free_str(filt); | |
1438 | free(filt); | |
1439 | } | |
1440 | ||
1441 | static void addr_filters__add(struct addr_filters *filts, | |
1442 | struct addr_filter *filt) | |
1443 | { | |
1444 | list_add_tail(&filt->list, &filts->head); | |
1445 | filts->cnt += 1; | |
1446 | } | |
1447 | ||
1448 | static void addr_filters__del(struct addr_filters *filts, | |
1449 | struct addr_filter *filt) | |
1450 | { | |
1451 | list_del_init(&filt->list); | |
1452 | filts->cnt -= 1; | |
1453 | } | |
1454 | ||
1455 | void addr_filters__init(struct addr_filters *filts) | |
1456 | { | |
1457 | INIT_LIST_HEAD(&filts->head); | |
1458 | filts->cnt = 0; | |
1459 | } | |
1460 | ||
1461 | void addr_filters__exit(struct addr_filters *filts) | |
1462 | { | |
1463 | struct addr_filter *filt, *n; | |
1464 | ||
1465 | list_for_each_entry_safe(filt, n, &filts->head, list) { | |
1466 | addr_filters__del(filts, filt); | |
1467 | addr_filter__free(filt); | |
1468 | } | |
1469 | } | |
1470 | ||
1471 | static int parse_num_or_str(char **inp, u64 *num, const char **str, | |
1472 | const char *str_delim) | |
1473 | { | |
1474 | *inp += strspn(*inp, " "); | |
1475 | ||
1476 | if (isdigit(**inp)) { | |
1477 | char *endptr; | |
1478 | ||
1479 | if (!num) | |
1480 | return -EINVAL; | |
1481 | errno = 0; | |
1482 | *num = strtoull(*inp, &endptr, 0); | |
1483 | if (errno) | |
1484 | return -errno; | |
1485 | if (endptr == *inp) | |
1486 | return -EINVAL; | |
1487 | *inp = endptr; | |
1488 | } else { | |
1489 | size_t n; | |
1490 | ||
1491 | if (!str) | |
1492 | return -EINVAL; | |
1493 | *inp += strspn(*inp, " "); | |
1494 | *str = *inp; | |
1495 | n = strcspn(*inp, str_delim); | |
1496 | if (!n) | |
1497 | return -EINVAL; | |
1498 | *inp += n; | |
1499 | if (**inp) { | |
1500 | **inp = '\0'; | |
1501 | *inp += 1; | |
1502 | } | |
1503 | } | |
1504 | return 0; | |
1505 | } | |
1506 | ||
1507 | static int parse_action(struct addr_filter *filt) | |
1508 | { | |
1509 | if (!strcmp(filt->action, "filter")) { | |
1510 | filt->start = true; | |
1511 | filt->range = true; | |
1512 | } else if (!strcmp(filt->action, "start")) { | |
1513 | filt->start = true; | |
1514 | } else if (!strcmp(filt->action, "stop")) { | |
1515 | filt->start = false; | |
1516 | } else if (!strcmp(filt->action, "tracestop")) { | |
1517 | filt->start = false; | |
1518 | filt->range = true; | |
1519 | filt->action += 5; /* Change 'tracestop' to 'stop' */ | |
1520 | } else { | |
1521 | return -EINVAL; | |
1522 | } | |
1523 | return 0; | |
1524 | } | |
1525 | ||
1526 | static int parse_sym_idx(char **inp, int *idx) | |
1527 | { | |
1528 | *idx = -1; | |
1529 | ||
1530 | *inp += strspn(*inp, " "); | |
1531 | ||
1532 | if (**inp != '#') | |
1533 | return 0; | |
1534 | ||
1535 | *inp += 1; | |
1536 | ||
1537 | if (**inp == 'g' || **inp == 'G') { | |
1538 | *inp += 1; | |
1539 | *idx = 0; | |
1540 | } else { | |
1541 | unsigned long num; | |
1542 | char *endptr; | |
1543 | ||
1544 | errno = 0; | |
1545 | num = strtoul(*inp, &endptr, 0); | |
1546 | if (errno) | |
1547 | return -errno; | |
1548 | if (endptr == *inp || num > INT_MAX) | |
1549 | return -EINVAL; | |
1550 | *inp = endptr; | |
1551 | *idx = num; | |
1552 | } | |
1553 | ||
1554 | return 0; | |
1555 | } | |
1556 | ||
1557 | static int parse_addr_size(char **inp, u64 *num, const char **str, int *idx) | |
1558 | { | |
1559 | int err = parse_num_or_str(inp, num, str, " "); | |
1560 | ||
1561 | if (!err && *str) | |
1562 | err = parse_sym_idx(inp, idx); | |
1563 | ||
1564 | return err; | |
1565 | } | |
1566 | ||
1567 | static int parse_one_filter(struct addr_filter *filt, const char **filter_inp) | |
1568 | { | |
1569 | char *fstr; | |
1570 | int err; | |
1571 | ||
1572 | filt->str = fstr = strdup(*filter_inp); | |
1573 | if (!fstr) | |
1574 | return -ENOMEM; | |
1575 | ||
1576 | err = parse_num_or_str(&fstr, NULL, &filt->action, " "); | |
1577 | if (err) | |
1578 | goto out_err; | |
1579 | ||
1580 | err = parse_action(filt); | |
1581 | if (err) | |
1582 | goto out_err; | |
1583 | ||
1584 | err = parse_addr_size(&fstr, &filt->addr, &filt->sym_from, | |
1585 | &filt->sym_from_idx); | |
1586 | if (err) | |
1587 | goto out_err; | |
1588 | ||
1589 | fstr += strspn(fstr, " "); | |
1590 | ||
1591 | if (*fstr == '/') { | |
1592 | fstr += 1; | |
1593 | err = parse_addr_size(&fstr, &filt->size, &filt->sym_to, | |
1594 | &filt->sym_to_idx); | |
1595 | if (err) | |
1596 | goto out_err; | |
1597 | filt->range = true; | |
1598 | } | |
1599 | ||
1600 | fstr += strspn(fstr, " "); | |
1601 | ||
1602 | if (*fstr == '@') { | |
1603 | fstr += 1; | |
1604 | err = parse_num_or_str(&fstr, NULL, &filt->filename, " ,"); | |
1605 | if (err) | |
1606 | goto out_err; | |
1607 | } | |
1608 | ||
1609 | fstr += strspn(fstr, " ,"); | |
1610 | ||
1611 | *filter_inp += fstr - filt->str; | |
1612 | ||
1613 | return 0; | |
1614 | ||
1615 | out_err: | |
1616 | addr_filter__free_str(filt); | |
1617 | ||
1618 | return err; | |
1619 | } | |
1620 | ||
1621 | int addr_filters__parse_bare_filter(struct addr_filters *filts, | |
1622 | const char *filter) | |
1623 | { | |
1624 | struct addr_filter *filt; | |
1625 | const char *fstr = filter; | |
1626 | int err; | |
1627 | ||
1628 | while (*fstr) { | |
1629 | filt = addr_filter__new(); | |
1630 | err = parse_one_filter(filt, &fstr); | |
1631 | if (err) { | |
1632 | addr_filter__free(filt); | |
1633 | addr_filters__exit(filts); | |
1634 | return err; | |
1635 | } | |
1636 | addr_filters__add(filts, filt); | |
1637 | } | |
1638 | ||
1639 | return 0; | |
1640 | } | |
1641 | ||
1642 | struct sym_args { | |
1643 | const char *name; | |
1644 | u64 start; | |
1645 | u64 size; | |
1646 | int idx; | |
1647 | int cnt; | |
1648 | bool started; | |
1649 | bool global; | |
1650 | bool selected; | |
1651 | bool duplicate; | |
1652 | bool near; | |
1653 | }; | |
1654 | ||
1655 | static bool kern_sym_match(struct sym_args *args, const char *name, char type) | |
1656 | { | |
1657 | /* A function with the same name, and global or the n'th found or any */ | |
1658 | return symbol_type__is_a(type, MAP__FUNCTION) && | |
1659 | !strcmp(name, args->name) && | |
1660 | ((args->global && isupper(type)) || | |
1661 | (args->selected && ++(args->cnt) == args->idx) || | |
1662 | (!args->global && !args->selected)); | |
1663 | } | |
1664 | ||
1665 | static int find_kern_sym_cb(void *arg, const char *name, char type, u64 start) | |
1666 | { | |
1667 | struct sym_args *args = arg; | |
1668 | ||
1669 | if (args->started) { | |
1670 | if (!args->size) | |
1671 | args->size = start - args->start; | |
1672 | if (args->selected) { | |
1673 | if (args->size) | |
1674 | return 1; | |
1675 | } else if (kern_sym_match(args, name, type)) { | |
1676 | args->duplicate = true; | |
1677 | return 1; | |
1678 | } | |
1679 | } else if (kern_sym_match(args, name, type)) { | |
1680 | args->started = true; | |
1681 | args->start = start; | |
1682 | } | |
1683 | ||
1684 | return 0; | |
1685 | } | |
1686 | ||
1687 | static int print_kern_sym_cb(void *arg, const char *name, char type, u64 start) | |
1688 | { | |
1689 | struct sym_args *args = arg; | |
1690 | ||
1691 | if (kern_sym_match(args, name, type)) { | |
1692 | pr_err("#%d\t0x%"PRIx64"\t%c\t%s\n", | |
1693 | ++args->cnt, start, type, name); | |
1694 | args->near = true; | |
1695 | } else if (args->near) { | |
1696 | args->near = false; | |
1697 | pr_err("\t\twhich is near\t\t%s\n", name); | |
1698 | } | |
1699 | ||
1700 | return 0; | |
1701 | } | |
1702 | ||
1703 | static int sym_not_found_error(const char *sym_name, int idx) | |
1704 | { | |
1705 | if (idx > 0) { | |
1706 | pr_err("N'th occurrence (N=%d) of symbol '%s' not found.\n", | |
1707 | idx, sym_name); | |
1708 | } else if (!idx) { | |
1709 | pr_err("Global symbol '%s' not found.\n", sym_name); | |
1710 | } else { | |
1711 | pr_err("Symbol '%s' not found.\n", sym_name); | |
1712 | } | |
1713 | pr_err("Note that symbols must be functions.\n"); | |
1714 | ||
1715 | return -EINVAL; | |
1716 | } | |
1717 | ||
1718 | static int find_kern_sym(const char *sym_name, u64 *start, u64 *size, int idx) | |
1719 | { | |
1720 | struct sym_args args = { | |
1721 | .name = sym_name, | |
1722 | .idx = idx, | |
1723 | .global = !idx, | |
1724 | .selected = idx > 0, | |
1725 | }; | |
1726 | int err; | |
1727 | ||
1728 | *start = 0; | |
1729 | *size = 0; | |
1730 | ||
1731 | err = kallsyms__parse("/proc/kallsyms", &args, find_kern_sym_cb); | |
1732 | if (err < 0) { | |
1733 | pr_err("Failed to parse /proc/kallsyms\n"); | |
1734 | return err; | |
1735 | } | |
1736 | ||
1737 | if (args.duplicate) { | |
1738 | pr_err("Multiple kernel symbols with name '%s'\n", sym_name); | |
1739 | args.cnt = 0; | |
1740 | kallsyms__parse("/proc/kallsyms", &args, print_kern_sym_cb); | |
1741 | pr_err("Disambiguate symbol name by inserting #n after the name e.g. %s #2\n", | |
1742 | sym_name); | |
1743 | pr_err("Or select a global symbol by inserting #0 or #g or #G\n"); | |
1744 | return -EINVAL; | |
1745 | } | |
1746 | ||
1747 | if (!args.started) { | |
1748 | pr_err("Kernel symbol lookup: "); | |
1749 | return sym_not_found_error(sym_name, idx); | |
1750 | } | |
1751 | ||
1752 | *start = args.start; | |
1753 | *size = args.size; | |
1754 | ||
1755 | return 0; | |
1756 | } | |
1757 | ||
1758 | static int find_entire_kern_cb(void *arg, const char *name __maybe_unused, | |
1759 | char type, u64 start) | |
1760 | { | |
1761 | struct sym_args *args = arg; | |
1762 | ||
1763 | if (!symbol_type__is_a(type, MAP__FUNCTION)) | |
1764 | return 0; | |
1765 | ||
1766 | if (!args->started) { | |
1767 | args->started = true; | |
1768 | args->start = start; | |
1769 | } | |
1770 | /* Don't know exactly where the kernel ends, so we add a page */ | |
1771 | args->size = round_up(start, page_size) + page_size - args->start; | |
1772 | ||
1773 | return 0; | |
1774 | } | |
1775 | ||
1776 | static int addr_filter__entire_kernel(struct addr_filter *filt) | |
1777 | { | |
1778 | struct sym_args args = { .started = false }; | |
1779 | int err; | |
1780 | ||
1781 | err = kallsyms__parse("/proc/kallsyms", &args, find_entire_kern_cb); | |
1782 | if (err < 0 || !args.started) { | |
1783 | pr_err("Failed to parse /proc/kallsyms\n"); | |
1784 | return err; | |
1785 | } | |
1786 | ||
1787 | filt->addr = args.start; | |
1788 | filt->size = args.size; | |
1789 | ||
1790 | return 0; | |
1791 | } | |
1792 | ||
1793 | static int check_end_after_start(struct addr_filter *filt, u64 start, u64 size) | |
1794 | { | |
1795 | if (start + size >= filt->addr) | |
1796 | return 0; | |
1797 | ||
1798 | if (filt->sym_from) { | |
1799 | pr_err("Symbol '%s' (0x%"PRIx64") comes before '%s' (0x%"PRIx64")\n", | |
1800 | filt->sym_to, start, filt->sym_from, filt->addr); | |
1801 | } else { | |
1802 | pr_err("Symbol '%s' (0x%"PRIx64") comes before address 0x%"PRIx64")\n", | |
1803 | filt->sym_to, start, filt->addr); | |
1804 | } | |
1805 | ||
1806 | return -EINVAL; | |
1807 | } | |
1808 | ||
1809 | static int addr_filter__resolve_kernel_syms(struct addr_filter *filt) | |
1810 | { | |
1811 | bool no_size = false; | |
1812 | u64 start, size; | |
1813 | int err; | |
1814 | ||
1815 | if (symbol_conf.kptr_restrict) { | |
1816 | pr_err("Kernel addresses are restricted. Unable to resolve kernel symbols.\n"); | |
1817 | return -EINVAL; | |
1818 | } | |
1819 | ||
1820 | if (filt->sym_from && !strcmp(filt->sym_from, "*")) | |
1821 | return addr_filter__entire_kernel(filt); | |
1822 | ||
1823 | if (filt->sym_from) { | |
1824 | err = find_kern_sym(filt->sym_from, &start, &size, | |
1825 | filt->sym_from_idx); | |
1826 | if (err) | |
1827 | return err; | |
1828 | filt->addr = start; | |
1829 | if (filt->range && !filt->size && !filt->sym_to) { | |
1830 | filt->size = size; | |
c3a0bbc7 | 1831 | no_size = !size; |
1b36c03e AH |
1832 | } |
1833 | } | |
1834 | ||
1835 | if (filt->sym_to) { | |
1836 | err = find_kern_sym(filt->sym_to, &start, &size, | |
1837 | filt->sym_to_idx); | |
1838 | if (err) | |
1839 | return err; | |
1840 | ||
1841 | err = check_end_after_start(filt, start, size); | |
1842 | if (err) | |
1843 | return err; | |
1844 | filt->size = start + size - filt->addr; | |
c3a0bbc7 | 1845 | no_size = !size; |
1b36c03e AH |
1846 | } |
1847 | ||
1848 | /* The very last symbol in kallsyms does not imply a particular size */ | |
1849 | if (no_size) { | |
1850 | pr_err("Cannot determine size of symbol '%s'\n", | |
1851 | filt->sym_to ? filt->sym_to : filt->sym_from); | |
1852 | return -EINVAL; | |
1853 | } | |
1854 | ||
1855 | return 0; | |
1856 | } | |
1857 | ||
1858 | static struct dso *load_dso(const char *name) | |
1859 | { | |
1860 | struct map *map; | |
1861 | struct dso *dso; | |
1862 | ||
1863 | map = dso__new_map(name); | |
1864 | if (!map) | |
1865 | return NULL; | |
1866 | ||
1867 | map__load(map); | |
1868 | ||
1869 | dso = dso__get(map->dso); | |
1870 | ||
1871 | map__put(map); | |
1872 | ||
1873 | return dso; | |
1874 | } | |
1875 | ||
1876 | static bool dso_sym_match(struct symbol *sym, const char *name, int *cnt, | |
1877 | int idx) | |
1878 | { | |
1879 | /* Same name, and global or the n'th found or any */ | |
1880 | return !arch__compare_symbol_names(name, sym->name) && | |
1881 | ((!idx && sym->binding == STB_GLOBAL) || | |
1882 | (idx > 0 && ++*cnt == idx) || | |
1883 | idx < 0); | |
1884 | } | |
1885 | ||
1886 | static void print_duplicate_syms(struct dso *dso, const char *sym_name) | |
1887 | { | |
1888 | struct symbol *sym; | |
1889 | bool near = false; | |
1890 | int cnt = 0; | |
1891 | ||
1892 | pr_err("Multiple symbols with name '%s'\n", sym_name); | |
1893 | ||
1894 | sym = dso__first_symbol(dso, MAP__FUNCTION); | |
1895 | while (sym) { | |
1896 | if (dso_sym_match(sym, sym_name, &cnt, -1)) { | |
1897 | pr_err("#%d\t0x%"PRIx64"\t%c\t%s\n", | |
1898 | ++cnt, sym->start, | |
1899 | sym->binding == STB_GLOBAL ? 'g' : | |
1900 | sym->binding == STB_LOCAL ? 'l' : 'w', | |
1901 | sym->name); | |
1902 | near = true; | |
1903 | } else if (near) { | |
1904 | near = false; | |
1905 | pr_err("\t\twhich is near\t\t%s\n", sym->name); | |
1906 | } | |
1907 | sym = dso__next_symbol(sym); | |
1908 | } | |
1909 | ||
1910 | pr_err("Disambiguate symbol name by inserting #n after the name e.g. %s #2\n", | |
1911 | sym_name); | |
1912 | pr_err("Or select a global symbol by inserting #0 or #g or #G\n"); | |
1913 | } | |
1914 | ||
1915 | static int find_dso_sym(struct dso *dso, const char *sym_name, u64 *start, | |
1916 | u64 *size, int idx) | |
1917 | { | |
1918 | struct symbol *sym; | |
1919 | int cnt = 0; | |
1920 | ||
1921 | *start = 0; | |
1922 | *size = 0; | |
1923 | ||
1924 | sym = dso__first_symbol(dso, MAP__FUNCTION); | |
1925 | while (sym) { | |
1926 | if (*start) { | |
1927 | if (!*size) | |
1928 | *size = sym->start - *start; | |
1929 | if (idx > 0) { | |
1930 | if (*size) | |
1931 | return 1; | |
1932 | } else if (dso_sym_match(sym, sym_name, &cnt, idx)) { | |
1933 | print_duplicate_syms(dso, sym_name); | |
1934 | return -EINVAL; | |
1935 | } | |
1936 | } else if (dso_sym_match(sym, sym_name, &cnt, idx)) { | |
1937 | *start = sym->start; | |
1938 | *size = sym->end - sym->start; | |
1939 | } | |
1940 | sym = dso__next_symbol(sym); | |
1941 | } | |
1942 | ||
1943 | if (!*start) | |
1944 | return sym_not_found_error(sym_name, idx); | |
1945 | ||
1946 | return 0; | |
1947 | } | |
1948 | ||
1949 | static int addr_filter__entire_dso(struct addr_filter *filt, struct dso *dso) | |
1950 | { | |
1951 | struct symbol *first_sym = dso__first_symbol(dso, MAP__FUNCTION); | |
1952 | struct symbol *last_sym = dso__last_symbol(dso, MAP__FUNCTION); | |
1953 | ||
1954 | if (!first_sym || !last_sym) { | |
1955 | pr_err("Failed to determine filter for %s\nNo symbols found.\n", | |
1956 | filt->filename); | |
1957 | return -EINVAL; | |
1958 | } | |
1959 | ||
1960 | filt->addr = first_sym->start; | |
1961 | filt->size = last_sym->end - first_sym->start; | |
1962 | ||
1963 | return 0; | |
1964 | } | |
1965 | ||
1966 | static int addr_filter__resolve_syms(struct addr_filter *filt) | |
1967 | { | |
1968 | u64 start, size; | |
1969 | struct dso *dso; | |
1970 | int err = 0; | |
1971 | ||
1972 | if (!filt->sym_from && !filt->sym_to) | |
1973 | return 0; | |
1974 | ||
1975 | if (!filt->filename) | |
1976 | return addr_filter__resolve_kernel_syms(filt); | |
1977 | ||
1978 | dso = load_dso(filt->filename); | |
1979 | if (!dso) { | |
1980 | pr_err("Failed to load symbols from: %s\n", filt->filename); | |
1981 | return -EINVAL; | |
1982 | } | |
1983 | ||
1984 | if (filt->sym_from && !strcmp(filt->sym_from, "*")) { | |
1985 | err = addr_filter__entire_dso(filt, dso); | |
1986 | goto put_dso; | |
1987 | } | |
1988 | ||
1989 | if (filt->sym_from) { | |
1990 | err = find_dso_sym(dso, filt->sym_from, &start, &size, | |
1991 | filt->sym_from_idx); | |
1992 | if (err) | |
1993 | goto put_dso; | |
1994 | filt->addr = start; | |
1995 | if (filt->range && !filt->size && !filt->sym_to) | |
1996 | filt->size = size; | |
1997 | } | |
1998 | ||
1999 | if (filt->sym_to) { | |
2000 | err = find_dso_sym(dso, filt->sym_to, &start, &size, | |
2001 | filt->sym_to_idx); | |
2002 | if (err) | |
2003 | goto put_dso; | |
2004 | ||
2005 | err = check_end_after_start(filt, start, size); | |
2006 | if (err) | |
2007 | return err; | |
2008 | ||
2009 | filt->size = start + size - filt->addr; | |
2010 | } | |
2011 | ||
2012 | put_dso: | |
2013 | dso__put(dso); | |
2014 | ||
2015 | return err; | |
2016 | } | |
2017 | ||
2018 | static char *addr_filter__to_str(struct addr_filter *filt) | |
2019 | { | |
2020 | char filename_buf[PATH_MAX]; | |
2021 | const char *at = ""; | |
2022 | const char *fn = ""; | |
2023 | char *filter; | |
2024 | int err; | |
2025 | ||
2026 | if (filt->filename) { | |
2027 | at = "@"; | |
2028 | fn = realpath(filt->filename, filename_buf); | |
2029 | if (!fn) | |
2030 | return NULL; | |
2031 | } | |
2032 | ||
2033 | if (filt->range) { | |
2034 | err = asprintf(&filter, "%s 0x%"PRIx64"/0x%"PRIx64"%s%s", | |
2035 | filt->action, filt->addr, filt->size, at, fn); | |
2036 | } else { | |
2037 | err = asprintf(&filter, "%s 0x%"PRIx64"%s%s", | |
2038 | filt->action, filt->addr, at, fn); | |
2039 | } | |
2040 | ||
2041 | return err < 0 ? NULL : filter; | |
2042 | } | |
2043 | ||
2044 | static int parse_addr_filter(struct perf_evsel *evsel, const char *filter, | |
2045 | int max_nr) | |
2046 | { | |
2047 | struct addr_filters filts; | |
2048 | struct addr_filter *filt; | |
2049 | int err; | |
2050 | ||
2051 | addr_filters__init(&filts); | |
2052 | ||
2053 | err = addr_filters__parse_bare_filter(&filts, filter); | |
2054 | if (err) | |
2055 | goto out_exit; | |
2056 | ||
2057 | if (filts.cnt > max_nr) { | |
2058 | pr_err("Error: number of address filters (%d) exceeds maximum (%d)\n", | |
2059 | filts.cnt, max_nr); | |
2060 | err = -EINVAL; | |
2061 | goto out_exit; | |
2062 | } | |
2063 | ||
2064 | list_for_each_entry(filt, &filts.head, list) { | |
2065 | char *new_filter; | |
2066 | ||
2067 | err = addr_filter__resolve_syms(filt); | |
2068 | if (err) | |
2069 | goto out_exit; | |
2070 | ||
2071 | new_filter = addr_filter__to_str(filt); | |
2072 | if (!new_filter) { | |
2073 | err = -ENOMEM; | |
2074 | goto out_exit; | |
2075 | } | |
2076 | ||
2077 | if (perf_evsel__append_addr_filter(evsel, new_filter)) { | |
2078 | err = -ENOMEM; | |
2079 | goto out_exit; | |
2080 | } | |
2081 | } | |
2082 | ||
2083 | out_exit: | |
2084 | addr_filters__exit(&filts); | |
2085 | ||
2086 | if (err) { | |
2087 | pr_err("Failed to parse address filter: '%s'\n", filter); | |
2088 | pr_err("Filter format is: filter|start|stop|tracestop <start symbol or address> [/ <end symbol or size>] [@<file name>]\n"); | |
2089 | pr_err("Where multiple filters are separated by space or comma.\n"); | |
2090 | } | |
2091 | ||
2092 | return err; | |
2093 | } | |
2094 | ||
2095 | static struct perf_pmu *perf_evsel__find_pmu(struct perf_evsel *evsel) | |
2096 | { | |
2097 | struct perf_pmu *pmu = NULL; | |
2098 | ||
2099 | while ((pmu = perf_pmu__scan(pmu)) != NULL) { | |
2100 | if (pmu->type == evsel->attr.type) | |
2101 | break; | |
2102 | } | |
2103 | ||
2104 | return pmu; | |
2105 | } | |
2106 | ||
2107 | static int perf_evsel__nr_addr_filter(struct perf_evsel *evsel) | |
2108 | { | |
2109 | struct perf_pmu *pmu = perf_evsel__find_pmu(evsel); | |
2110 | int nr_addr_filters = 0; | |
2111 | ||
2112 | if (!pmu) | |
2113 | return 0; | |
2114 | ||
2115 | perf_pmu__scan_file(pmu, "nr_addr_filters", "%d", &nr_addr_filters); | |
2116 | ||
2117 | return nr_addr_filters; | |
2118 | } | |
2119 | ||
2120 | int auxtrace_parse_filters(struct perf_evlist *evlist) | |
2121 | { | |
2122 | struct perf_evsel *evsel; | |
2123 | char *filter; | |
2124 | int err, max_nr; | |
2125 | ||
2126 | evlist__for_each_entry(evlist, evsel) { | |
2127 | filter = evsel->filter; | |
2128 | max_nr = perf_evsel__nr_addr_filter(evsel); | |
2129 | if (!filter || !max_nr) | |
2130 | continue; | |
2131 | evsel->filter = NULL; | |
2132 | err = parse_addr_filter(evsel, filter, max_nr); | |
2133 | free(filter); | |
2134 | if (err) | |
2135 | return err; | |
2136 | pr_debug("Address filter: %s\n", evsel->filter); | |
2137 | } | |
2138 | ||
2139 | return 0; | |
2140 | } |