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1 | /* |
2 | * Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com> |
3 | * |
4 | * Parts came from builtin-{top,stat,record}.c, see those files for further |
5 | * copyright notes. |
6 | * |
7 | * Released under the GPL v2. (and only v2, not any later version) |
8 | */ |
9 | |
10 | #include <byteswap.h> |
11 | #include "asm/bug.h" |
12 | #include "evsel.h" |
13 | #include "evlist.h" |
14 | #include "util.h" |
15 | #include "cpumap.h" |
16 | #include "thread_map.h" |
17 | #include "target.h" |
18 | #include "../../include/linux/perf_event.h" |
19 | |
20 | #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y)) |
21 | #define GROUP_FD(group_fd, cpu) (*(int *)xyarray__entry(group_fd, cpu, 0)) |
22 | |
23 | int __perf_evsel__sample_size(u64 sample_type) |
24 | { |
25 | u64 mask = sample_type & PERF_SAMPLE_MASK; |
26 | int size = 0; |
27 | int i; |
28 | |
29 | for (i = 0; i < 64; i++) { |
30 | if (mask & (1ULL << i)) |
31 | size++; |
32 | } |
33 | |
34 | size *= sizeof(u64); |
35 | |
36 | return size; |
37 | } |
38 | |
39 | void hists__init(struct hists *hists) |
40 | { |
41 | memset(hists, 0, sizeof(*hists)); |
42 | hists->entries_in_array[0] = hists->entries_in_array[1] = RB_ROOT; |
43 | hists->entries_in = &hists->entries_in_array[0]; |
44 | hists->entries_collapsed = RB_ROOT; |
45 | hists->entries = RB_ROOT; |
46 | pthread_mutex_init(&hists->lock, NULL); |
47 | } |
48 | |
49 | void perf_evsel__init(struct perf_evsel *evsel, |
50 | struct perf_event_attr *attr, int idx) |
51 | { |
52 | evsel->idx = idx; |
53 | evsel->attr = *attr; |
54 | INIT_LIST_HEAD(&evsel->node); |
55 | hists__init(&evsel->hists); |
56 | } |
57 | |
58 | struct perf_evsel *perf_evsel__new(struct perf_event_attr *attr, int idx) |
59 | { |
60 | struct perf_evsel *evsel = zalloc(sizeof(*evsel)); |
61 | |
62 | if (evsel != NULL) |
63 | perf_evsel__init(evsel, attr, idx); |
64 | |
65 | return evsel; |
66 | } |
67 | |
68 | static const char *perf_evsel__hw_names[PERF_COUNT_HW_MAX] = { |
69 | "cycles", |
70 | "instructions", |
71 | "cache-references", |
72 | "cache-misses", |
73 | "branches", |
74 | "branch-misses", |
75 | "bus-cycles", |
76 | "stalled-cycles-frontend", |
77 | "stalled-cycles-backend", |
78 | "ref-cycles", |
79 | }; |
80 | |
81 | const char *__perf_evsel__hw_name(u64 config) |
82 | { |
83 | if (config < PERF_COUNT_HW_MAX && perf_evsel__hw_names[config]) |
84 | return perf_evsel__hw_names[config]; |
85 | |
86 | return "unknown-hardware"; |
87 | } |
88 | |
89 | static int perf_evsel__hw_name(struct perf_evsel *evsel, char *bf, size_t size) |
90 | { |
91 | int colon = 0; |
92 | struct perf_event_attr *attr = &evsel->attr; |
93 | int r = scnprintf(bf, size, "%s", __perf_evsel__hw_name(attr->config)); |
94 | bool exclude_guest_default = false; |
95 | |
96 | #define MOD_PRINT(context, mod) do { \ |
97 | if (!attr->exclude_##context) { \ |
98 | if (!colon) colon = r++; \ |
99 | r += scnprintf(bf + r, size - r, "%c", mod); \ |
100 | } } while(0) |
101 | |
102 | if (attr->exclude_kernel || attr->exclude_user || attr->exclude_hv) { |
103 | MOD_PRINT(kernel, 'k'); |
104 | MOD_PRINT(user, 'u'); |
105 | MOD_PRINT(hv, 'h'); |
106 | exclude_guest_default = true; |
107 | } |
108 | |
109 | if (attr->precise_ip) { |
110 | if (!colon) |
111 | colon = r++; |
112 | r += scnprintf(bf + r, size - r, "%.*s", attr->precise_ip, "ppp"); |
113 | exclude_guest_default = true; |
114 | } |
115 | |
116 | if (attr->exclude_host || attr->exclude_guest == exclude_guest_default) { |
117 | MOD_PRINT(host, 'H'); |
118 | MOD_PRINT(guest, 'G'); |
119 | } |
120 | #undef MOD_PRINT |
121 | if (colon) |
122 | bf[colon] = ':'; |
123 | return r; |
124 | } |
125 | |
126 | int perf_evsel__name(struct perf_evsel *evsel, char *bf, size_t size) |
127 | { |
128 | int ret; |
129 | |
130 | switch (evsel->attr.type) { |
131 | case PERF_TYPE_RAW: |
132 | ret = scnprintf(bf, size, "raw 0x%" PRIx64, evsel->attr.config); |
133 | break; |
134 | |
135 | case PERF_TYPE_HARDWARE: |
136 | ret = perf_evsel__hw_name(evsel, bf, size); |
137 | break; |
138 | default: |
139 | /* |
140 | * FIXME |
141 | * |
142 | * This is the minimal perf_evsel__name so that we can |
143 | * reconstruct event names taking into account event modifiers. |
144 | * |
145 | * The old event_name uses it now for raw anr hw events, so that |
146 | * we don't drag all the parsing stuff into the python binding. |
147 | * |
148 | * On the next devel cycle the rest of the event naming will be |
149 | * brought here. |
150 | */ |
151 | return 0; |
152 | } |
153 | |
154 | return ret; |
155 | } |
156 | |
157 | void perf_evsel__config(struct perf_evsel *evsel, struct perf_record_opts *opts, |
158 | struct perf_evsel *first) |
159 | { |
160 | struct perf_event_attr *attr = &evsel->attr; |
161 | int track = !evsel->idx; /* only the first counter needs these */ |
162 | |
163 | attr->disabled = 1; |
164 | attr->sample_id_all = opts->sample_id_all_missing ? 0 : 1; |
165 | attr->inherit = !opts->no_inherit; |
166 | attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED | |
167 | PERF_FORMAT_TOTAL_TIME_RUNNING | |
168 | PERF_FORMAT_ID; |
169 | |
170 | attr->sample_type |= PERF_SAMPLE_IP | PERF_SAMPLE_TID; |
171 | |
172 | /* |
173 | * We default some events to a 1 default interval. But keep |
174 | * it a weak assumption overridable by the user. |
175 | */ |
176 | if (!attr->sample_period || (opts->user_freq != UINT_MAX && |
177 | opts->user_interval != ULLONG_MAX)) { |
178 | if (opts->freq) { |
179 | attr->sample_type |= PERF_SAMPLE_PERIOD; |
180 | attr->freq = 1; |
181 | attr->sample_freq = opts->freq; |
182 | } else { |
183 | attr->sample_period = opts->default_interval; |
184 | } |
185 | } |
186 | |
187 | if (opts->no_samples) |
188 | attr->sample_freq = 0; |
189 | |
190 | if (opts->inherit_stat) |
191 | attr->inherit_stat = 1; |
192 | |
193 | if (opts->sample_address) { |
194 | attr->sample_type |= PERF_SAMPLE_ADDR; |
195 | attr->mmap_data = track; |
196 | } |
197 | |
198 | if (opts->call_graph) |
199 | attr->sample_type |= PERF_SAMPLE_CALLCHAIN; |
200 | |
201 | if (perf_target__has_cpu(&opts->target)) |
202 | attr->sample_type |= PERF_SAMPLE_CPU; |
203 | |
204 | if (opts->period) |
205 | attr->sample_type |= PERF_SAMPLE_PERIOD; |
206 | |
207 | if (!opts->sample_id_all_missing && |
208 | (opts->sample_time || !opts->no_inherit || |
209 | perf_target__has_cpu(&opts->target))) |
210 | attr->sample_type |= PERF_SAMPLE_TIME; |
211 | |
212 | if (opts->raw_samples) { |
213 | attr->sample_type |= PERF_SAMPLE_TIME; |
214 | attr->sample_type |= PERF_SAMPLE_RAW; |
215 | attr->sample_type |= PERF_SAMPLE_CPU; |
216 | } |
217 | |
218 | if (opts->no_delay) { |
219 | attr->watermark = 0; |
220 | attr->wakeup_events = 1; |
221 | } |
222 | if (opts->branch_stack) { |
223 | attr->sample_type |= PERF_SAMPLE_BRANCH_STACK; |
224 | attr->branch_sample_type = opts->branch_stack; |
225 | } |
226 | |
227 | attr->mmap = track; |
228 | attr->comm = track; |
229 | |
230 | if (perf_target__none(&opts->target) && |
231 | (!opts->group || evsel == first)) { |
232 | attr->enable_on_exec = 1; |
233 | } |
234 | } |
235 | |
236 | int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads) |
237 | { |
238 | int cpu, thread; |
239 | evsel->fd = xyarray__new(ncpus, nthreads, sizeof(int)); |
240 | |
241 | if (evsel->fd) { |
242 | for (cpu = 0; cpu < ncpus; cpu++) { |
243 | for (thread = 0; thread < nthreads; thread++) { |
244 | FD(evsel, cpu, thread) = -1; |
245 | } |
246 | } |
247 | } |
248 | |
249 | return evsel->fd != NULL ? 0 : -ENOMEM; |
250 | } |
251 | |
252 | int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads) |
253 | { |
254 | evsel->sample_id = xyarray__new(ncpus, nthreads, sizeof(struct perf_sample_id)); |
255 | if (evsel->sample_id == NULL) |
256 | return -ENOMEM; |
257 | |
258 | evsel->id = zalloc(ncpus * nthreads * sizeof(u64)); |
259 | if (evsel->id == NULL) { |
260 | xyarray__delete(evsel->sample_id); |
261 | evsel->sample_id = NULL; |
262 | return -ENOMEM; |
263 | } |
264 | |
265 | return 0; |
266 | } |
267 | |
268 | int perf_evsel__alloc_counts(struct perf_evsel *evsel, int ncpus) |
269 | { |
270 | evsel->counts = zalloc((sizeof(*evsel->counts) + |
271 | (ncpus * sizeof(struct perf_counts_values)))); |
272 | return evsel->counts != NULL ? 0 : -ENOMEM; |
273 | } |
274 | |
275 | void perf_evsel__free_fd(struct perf_evsel *evsel) |
276 | { |
277 | xyarray__delete(evsel->fd); |
278 | evsel->fd = NULL; |
279 | } |
280 | |
281 | void perf_evsel__free_id(struct perf_evsel *evsel) |
282 | { |
283 | xyarray__delete(evsel->sample_id); |
284 | evsel->sample_id = NULL; |
285 | free(evsel->id); |
286 | evsel->id = NULL; |
287 | } |
288 | |
289 | void perf_evsel__close_fd(struct perf_evsel *evsel, int ncpus, int nthreads) |
290 | { |
291 | int cpu, thread; |
292 | |
293 | for (cpu = 0; cpu < ncpus; cpu++) |
294 | for (thread = 0; thread < nthreads; ++thread) { |
295 | close(FD(evsel, cpu, thread)); |
296 | FD(evsel, cpu, thread) = -1; |
297 | } |
298 | } |
299 | |
300 | void perf_evsel__exit(struct perf_evsel *evsel) |
301 | { |
302 | assert(list_empty(&evsel->node)); |
303 | xyarray__delete(evsel->fd); |
304 | xyarray__delete(evsel->sample_id); |
305 | free(evsel->id); |
306 | } |
307 | |
308 | void perf_evsel__delete(struct perf_evsel *evsel) |
309 | { |
310 | perf_evsel__exit(evsel); |
311 | close_cgroup(evsel->cgrp); |
312 | free(evsel->name); |
313 | free(evsel); |
314 | } |
315 | |
316 | int __perf_evsel__read_on_cpu(struct perf_evsel *evsel, |
317 | int cpu, int thread, bool scale) |
318 | { |
319 | struct perf_counts_values count; |
320 | size_t nv = scale ? 3 : 1; |
321 | |
322 | if (FD(evsel, cpu, thread) < 0) |
323 | return -EINVAL; |
324 | |
325 | if (evsel->counts == NULL && perf_evsel__alloc_counts(evsel, cpu + 1) < 0) |
326 | return -ENOMEM; |
327 | |
328 | if (readn(FD(evsel, cpu, thread), &count, nv * sizeof(u64)) < 0) |
329 | return -errno; |
330 | |
331 | if (scale) { |
332 | if (count.run == 0) |
333 | count.val = 0; |
334 | else if (count.run < count.ena) |
335 | count.val = (u64)((double)count.val * count.ena / count.run + 0.5); |
336 | } else |
337 | count.ena = count.run = 0; |
338 | |
339 | evsel->counts->cpu[cpu] = count; |
340 | return 0; |
341 | } |
342 | |
343 | int __perf_evsel__read(struct perf_evsel *evsel, |
344 | int ncpus, int nthreads, bool scale) |
345 | { |
346 | size_t nv = scale ? 3 : 1; |
347 | int cpu, thread; |
348 | struct perf_counts_values *aggr = &evsel->counts->aggr, count; |
349 | |
350 | aggr->val = aggr->ena = aggr->run = 0; |
351 | |
352 | for (cpu = 0; cpu < ncpus; cpu++) { |
353 | for (thread = 0; thread < nthreads; thread++) { |
354 | if (FD(evsel, cpu, thread) < 0) |
355 | continue; |
356 | |
357 | if (readn(FD(evsel, cpu, thread), |
358 | &count, nv * sizeof(u64)) < 0) |
359 | return -errno; |
360 | |
361 | aggr->val += count.val; |
362 | if (scale) { |
363 | aggr->ena += count.ena; |
364 | aggr->run += count.run; |
365 | } |
366 | } |
367 | } |
368 | |
369 | evsel->counts->scaled = 0; |
370 | if (scale) { |
371 | if (aggr->run == 0) { |
372 | evsel->counts->scaled = -1; |
373 | aggr->val = 0; |
374 | return 0; |
375 | } |
376 | |
377 | if (aggr->run < aggr->ena) { |
378 | evsel->counts->scaled = 1; |
379 | aggr->val = (u64)((double)aggr->val * aggr->ena / aggr->run + 0.5); |
380 | } |
381 | } else |
382 | aggr->ena = aggr->run = 0; |
383 | |
384 | return 0; |
385 | } |
386 | |
387 | static int __perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus, |
388 | struct thread_map *threads, bool group, |
389 | struct xyarray *group_fds) |
390 | { |
391 | int cpu, thread; |
392 | unsigned long flags = 0; |
393 | int pid = -1, err; |
394 | |
395 | if (evsel->fd == NULL && |
396 | perf_evsel__alloc_fd(evsel, cpus->nr, threads->nr) < 0) |
397 | return -ENOMEM; |
398 | |
399 | if (evsel->cgrp) { |
400 | flags = PERF_FLAG_PID_CGROUP; |
401 | pid = evsel->cgrp->fd; |
402 | } |
403 | |
404 | for (cpu = 0; cpu < cpus->nr; cpu++) { |
405 | int group_fd = group_fds ? GROUP_FD(group_fds, cpu) : -1; |
406 | |
407 | for (thread = 0; thread < threads->nr; thread++) { |
408 | |
409 | if (!evsel->cgrp) |
410 | pid = threads->map[thread]; |
411 | |
412 | FD(evsel, cpu, thread) = sys_perf_event_open(&evsel->attr, |
413 | pid, |
414 | cpus->map[cpu], |
415 | group_fd, flags); |
416 | if (FD(evsel, cpu, thread) < 0) { |
417 | err = -errno; |
418 | goto out_close; |
419 | } |
420 | |
421 | if (group && group_fd == -1) |
422 | group_fd = FD(evsel, cpu, thread); |
423 | } |
424 | } |
425 | |
426 | return 0; |
427 | |
428 | out_close: |
429 | do { |
430 | while (--thread >= 0) { |
431 | close(FD(evsel, cpu, thread)); |
432 | FD(evsel, cpu, thread) = -1; |
433 | } |
434 | thread = threads->nr; |
435 | } while (--cpu >= 0); |
436 | return err; |
437 | } |
438 | |
439 | void perf_evsel__close(struct perf_evsel *evsel, int ncpus, int nthreads) |
440 | { |
441 | if (evsel->fd == NULL) |
442 | return; |
443 | |
444 | perf_evsel__close_fd(evsel, ncpus, nthreads); |
445 | perf_evsel__free_fd(evsel); |
446 | evsel->fd = NULL; |
447 | } |
448 | |
449 | static struct { |
450 | struct cpu_map map; |
451 | int cpus[1]; |
452 | } empty_cpu_map = { |
453 | .map.nr = 1, |
454 | .cpus = { -1, }, |
455 | }; |
456 | |
457 | static struct { |
458 | struct thread_map map; |
459 | int threads[1]; |
460 | } empty_thread_map = { |
461 | .map.nr = 1, |
462 | .threads = { -1, }, |
463 | }; |
464 | |
465 | int perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus, |
466 | struct thread_map *threads, bool group, |
467 | struct xyarray *group_fd) |
468 | { |
469 | if (cpus == NULL) { |
470 | /* Work around old compiler warnings about strict aliasing */ |
471 | cpus = &empty_cpu_map.map; |
472 | } |
473 | |
474 | if (threads == NULL) |
475 | threads = &empty_thread_map.map; |
476 | |
477 | return __perf_evsel__open(evsel, cpus, threads, group, group_fd); |
478 | } |
479 | |
480 | int perf_evsel__open_per_cpu(struct perf_evsel *evsel, |
481 | struct cpu_map *cpus, bool group, |
482 | struct xyarray *group_fd) |
483 | { |
484 | return __perf_evsel__open(evsel, cpus, &empty_thread_map.map, group, |
485 | group_fd); |
486 | } |
487 | |
488 | int perf_evsel__open_per_thread(struct perf_evsel *evsel, |
489 | struct thread_map *threads, bool group, |
490 | struct xyarray *group_fd) |
491 | { |
492 | return __perf_evsel__open(evsel, &empty_cpu_map.map, threads, group, |
493 | group_fd); |
494 | } |
495 | |
496 | static int perf_event__parse_id_sample(const union perf_event *event, u64 type, |
497 | struct perf_sample *sample, |
498 | bool swapped) |
499 | { |
500 | const u64 *array = event->sample.array; |
501 | union u64_swap u; |
502 | |
503 | array += ((event->header.size - |
504 | sizeof(event->header)) / sizeof(u64)) - 1; |
505 | |
506 | if (type & PERF_SAMPLE_CPU) { |
507 | u.val64 = *array; |
508 | if (swapped) { |
509 | /* undo swap of u64, then swap on individual u32s */ |
510 | u.val64 = bswap_64(u.val64); |
511 | u.val32[0] = bswap_32(u.val32[0]); |
512 | } |
513 | |
514 | sample->cpu = u.val32[0]; |
515 | array--; |
516 | } |
517 | |
518 | if (type & PERF_SAMPLE_STREAM_ID) { |
519 | sample->stream_id = *array; |
520 | array--; |
521 | } |
522 | |
523 | if (type & PERF_SAMPLE_ID) { |
524 | sample->id = *array; |
525 | array--; |
526 | } |
527 | |
528 | if (type & PERF_SAMPLE_TIME) { |
529 | sample->time = *array; |
530 | array--; |
531 | } |
532 | |
533 | if (type & PERF_SAMPLE_TID) { |
534 | u.val64 = *array; |
535 | if (swapped) { |
536 | /* undo swap of u64, then swap on individual u32s */ |
537 | u.val64 = bswap_64(u.val64); |
538 | u.val32[0] = bswap_32(u.val32[0]); |
539 | u.val32[1] = bswap_32(u.val32[1]); |
540 | } |
541 | |
542 | sample->pid = u.val32[0]; |
543 | sample->tid = u.val32[1]; |
544 | } |
545 | |
546 | return 0; |
547 | } |
548 | |
549 | static bool sample_overlap(const union perf_event *event, |
550 | const void *offset, u64 size) |
551 | { |
552 | const void *base = event; |
553 | |
554 | if (offset + size > base + event->header.size) |
555 | return true; |
556 | |
557 | return false; |
558 | } |
559 | |
560 | int perf_event__parse_sample(const union perf_event *event, u64 type, |
561 | int sample_size, bool sample_id_all, |
562 | struct perf_sample *data, bool swapped) |
563 | { |
564 | const u64 *array; |
565 | |
566 | /* |
567 | * used for cross-endian analysis. See git commit 65014ab3 |
568 | * for why this goofiness is needed. |
569 | */ |
570 | union u64_swap u; |
571 | |
572 | memset(data, 0, sizeof(*data)); |
573 | data->cpu = data->pid = data->tid = -1; |
574 | data->stream_id = data->id = data->time = -1ULL; |
575 | data->period = 1; |
576 | |
577 | if (event->header.type != PERF_RECORD_SAMPLE) { |
578 | if (!sample_id_all) |
579 | return 0; |
580 | return perf_event__parse_id_sample(event, type, data, swapped); |
581 | } |
582 | |
583 | array = event->sample.array; |
584 | |
585 | if (sample_size + sizeof(event->header) > event->header.size) |
586 | return -EFAULT; |
587 | |
588 | if (type & PERF_SAMPLE_IP) { |
589 | data->ip = event->ip.ip; |
590 | array++; |
591 | } |
592 | |
593 | if (type & PERF_SAMPLE_TID) { |
594 | u.val64 = *array; |
595 | if (swapped) { |
596 | /* undo swap of u64, then swap on individual u32s */ |
597 | u.val64 = bswap_64(u.val64); |
598 | u.val32[0] = bswap_32(u.val32[0]); |
599 | u.val32[1] = bswap_32(u.val32[1]); |
600 | } |
601 | |
602 | data->pid = u.val32[0]; |
603 | data->tid = u.val32[1]; |
604 | array++; |
605 | } |
606 | |
607 | if (type & PERF_SAMPLE_TIME) { |
608 | data->time = *array; |
609 | array++; |
610 | } |
611 | |
612 | data->addr = 0; |
613 | if (type & PERF_SAMPLE_ADDR) { |
614 | data->addr = *array; |
615 | array++; |
616 | } |
617 | |
618 | data->id = -1ULL; |
619 | if (type & PERF_SAMPLE_ID) { |
620 | data->id = *array; |
621 | array++; |
622 | } |
623 | |
624 | if (type & PERF_SAMPLE_STREAM_ID) { |
625 | data->stream_id = *array; |
626 | array++; |
627 | } |
628 | |
629 | if (type & PERF_SAMPLE_CPU) { |
630 | |
631 | u.val64 = *array; |
632 | if (swapped) { |
633 | /* undo swap of u64, then swap on individual u32s */ |
634 | u.val64 = bswap_64(u.val64); |
635 | u.val32[0] = bswap_32(u.val32[0]); |
636 | } |
637 | |
638 | data->cpu = u.val32[0]; |
639 | array++; |
640 | } |
641 | |
642 | if (type & PERF_SAMPLE_PERIOD) { |
643 | data->period = *array; |
644 | array++; |
645 | } |
646 | |
647 | if (type & PERF_SAMPLE_READ) { |
648 | fprintf(stderr, "PERF_SAMPLE_READ is unsupported for now\n"); |
649 | return -1; |
650 | } |
651 | |
652 | if (type & PERF_SAMPLE_CALLCHAIN) { |
653 | if (sample_overlap(event, array, sizeof(data->callchain->nr))) |
654 | return -EFAULT; |
655 | |
656 | data->callchain = (struct ip_callchain *)array; |
657 | |
658 | if (sample_overlap(event, array, data->callchain->nr)) |
659 | return -EFAULT; |
660 | |
661 | array += 1 + data->callchain->nr; |
662 | } |
663 | |
664 | if (type & PERF_SAMPLE_RAW) { |
665 | const u64 *pdata; |
666 | |
667 | u.val64 = *array; |
668 | if (WARN_ONCE(swapped, |
669 | "Endianness of raw data not corrected!\n")) { |
670 | /* undo swap of u64, then swap on individual u32s */ |
671 | u.val64 = bswap_64(u.val64); |
672 | u.val32[0] = bswap_32(u.val32[0]); |
673 | u.val32[1] = bswap_32(u.val32[1]); |
674 | } |
675 | |
676 | if (sample_overlap(event, array, sizeof(u32))) |
677 | return -EFAULT; |
678 | |
679 | data->raw_size = u.val32[0]; |
680 | pdata = (void *) array + sizeof(u32); |
681 | |
682 | if (sample_overlap(event, pdata, data->raw_size)) |
683 | return -EFAULT; |
684 | |
685 | data->raw_data = (void *) pdata; |
686 | |
687 | array = (void *)array + data->raw_size + sizeof(u32); |
688 | } |
689 | |
690 | if (type & PERF_SAMPLE_BRANCH_STACK) { |
691 | u64 sz; |
692 | |
693 | data->branch_stack = (struct branch_stack *)array; |
694 | array++; /* nr */ |
695 | |
696 | sz = data->branch_stack->nr * sizeof(struct branch_entry); |
697 | sz /= sizeof(u64); |
698 | array += sz; |
699 | } |
700 | return 0; |
701 | } |
702 | |
703 | int perf_event__synthesize_sample(union perf_event *event, u64 type, |
704 | const struct perf_sample *sample, |
705 | bool swapped) |
706 | { |
707 | u64 *array; |
708 | |
709 | /* |
710 | * used for cross-endian analysis. See git commit 65014ab3 |
711 | * for why this goofiness is needed. |
712 | */ |
713 | union u64_swap u; |
714 | |
715 | array = event->sample.array; |
716 | |
717 | if (type & PERF_SAMPLE_IP) { |
718 | event->ip.ip = sample->ip; |
719 | array++; |
720 | } |
721 | |
722 | if (type & PERF_SAMPLE_TID) { |
723 | u.val32[0] = sample->pid; |
724 | u.val32[1] = sample->tid; |
725 | if (swapped) { |
726 | /* |
727 | * Inverse of what is done in perf_event__parse_sample |
728 | */ |
729 | u.val32[0] = bswap_32(u.val32[0]); |
730 | u.val32[1] = bswap_32(u.val32[1]); |
731 | u.val64 = bswap_64(u.val64); |
732 | } |
733 | |
734 | *array = u.val64; |
735 | array++; |
736 | } |
737 | |
738 | if (type & PERF_SAMPLE_TIME) { |
739 | *array = sample->time; |
740 | array++; |
741 | } |
742 | |
743 | if (type & PERF_SAMPLE_ADDR) { |
744 | *array = sample->addr; |
745 | array++; |
746 | } |
747 | |
748 | if (type & PERF_SAMPLE_ID) { |
749 | *array = sample->id; |
750 | array++; |
751 | } |
752 | |
753 | if (type & PERF_SAMPLE_STREAM_ID) { |
754 | *array = sample->stream_id; |
755 | array++; |
756 | } |
757 | |
758 | if (type & PERF_SAMPLE_CPU) { |
759 | u.val32[0] = sample->cpu; |
760 | if (swapped) { |
761 | /* |
762 | * Inverse of what is done in perf_event__parse_sample |
763 | */ |
764 | u.val32[0] = bswap_32(u.val32[0]); |
765 | u.val64 = bswap_64(u.val64); |
766 | } |
767 | *array = u.val64; |
768 | array++; |
769 | } |
770 | |
771 | if (type & PERF_SAMPLE_PERIOD) { |
772 | *array = sample->period; |
773 | array++; |
774 | } |
775 | |
776 | return 0; |
777 | } |
778 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9