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ALSA: hda_intel: add position_fix quirk for Asus K53E
[deliverable/linux.git] / tools / perf / util / evsel.c
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/hw_breakpoint.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 static 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__add_modifiers(struct perf_evsel *evsel, char *bf, size_t size)
90 {
91 int colon = 0, r = 0;
92 struct perf_event_attr *attr = &evsel->attr;
93 bool exclude_guest_default = false;
94
95 #define MOD_PRINT(context, mod) do { \
96 if (!attr->exclude_##context) { \
97 if (!colon) colon = ++r; \
98 r += scnprintf(bf + r, size - r, "%c", mod); \
99 } } while(0)
100
101 if (attr->exclude_kernel || attr->exclude_user || attr->exclude_hv) {
102 MOD_PRINT(kernel, 'k');
103 MOD_PRINT(user, 'u');
104 MOD_PRINT(hv, 'h');
105 exclude_guest_default = true;
106 }
107
108 if (attr->precise_ip) {
109 if (!colon)
110 colon = ++r;
111 r += scnprintf(bf + r, size - r, "%.*s", attr->precise_ip, "ppp");
112 exclude_guest_default = true;
113 }
114
115 if (attr->exclude_host || attr->exclude_guest == exclude_guest_default) {
116 MOD_PRINT(host, 'H');
117 MOD_PRINT(guest, 'G');
118 }
119 #undef MOD_PRINT
120 if (colon)
121 bf[colon - 1] = ':';
122 return r;
123 }
124
125 static int perf_evsel__hw_name(struct perf_evsel *evsel, char *bf, size_t size)
126 {
127 int r = scnprintf(bf, size, "%s", __perf_evsel__hw_name(evsel->attr.config));
128 return r + perf_evsel__add_modifiers(evsel, bf + r, size - r);
129 }
130
131 static const char *perf_evsel__sw_names[PERF_COUNT_SW_MAX] = {
132 "cpu-clock",
133 "task-clock",
134 "page-faults",
135 "context-switches",
136 "CPU-migrations",
137 "minor-faults",
138 "major-faults",
139 "alignment-faults",
140 "emulation-faults",
141 };
142
143 static const char *__perf_evsel__sw_name(u64 config)
144 {
145 if (config < PERF_COUNT_SW_MAX && perf_evsel__sw_names[config])
146 return perf_evsel__sw_names[config];
147 return "unknown-software";
148 }
149
150 static int perf_evsel__sw_name(struct perf_evsel *evsel, char *bf, size_t size)
151 {
152 int r = scnprintf(bf, size, "%s", __perf_evsel__sw_name(evsel->attr.config));
153 return r + perf_evsel__add_modifiers(evsel, bf + r, size - r);
154 }
155
156 static int __perf_evsel__bp_name(char *bf, size_t size, u64 addr, u64 type)
157 {
158 int r;
159
160 r = scnprintf(bf, size, "mem:0x%" PRIx64 ":", addr);
161
162 if (type & HW_BREAKPOINT_R)
163 r += scnprintf(bf + r, size - r, "r");
164
165 if (type & HW_BREAKPOINT_W)
166 r += scnprintf(bf + r, size - r, "w");
167
168 if (type & HW_BREAKPOINT_X)
169 r += scnprintf(bf + r, size - r, "x");
170
171 return r;
172 }
173
174 static int perf_evsel__bp_name(struct perf_evsel *evsel, char *bf, size_t size)
175 {
176 struct perf_event_attr *attr = &evsel->attr;
177 int r = __perf_evsel__bp_name(bf, size, attr->bp_addr, attr->bp_type);
178 return r + perf_evsel__add_modifiers(evsel, bf + r, size - r);
179 }
180
181 const char *perf_evsel__hw_cache[PERF_COUNT_HW_CACHE_MAX]
182 [PERF_EVSEL__MAX_ALIASES] = {
183 { "L1-dcache", "l1-d", "l1d", "L1-data", },
184 { "L1-icache", "l1-i", "l1i", "L1-instruction", },
185 { "LLC", "L2", },
186 { "dTLB", "d-tlb", "Data-TLB", },
187 { "iTLB", "i-tlb", "Instruction-TLB", },
188 { "branch", "branches", "bpu", "btb", "bpc", },
189 { "node", },
190 };
191
192 const char *perf_evsel__hw_cache_op[PERF_COUNT_HW_CACHE_OP_MAX]
193 [PERF_EVSEL__MAX_ALIASES] = {
194 { "load", "loads", "read", },
195 { "store", "stores", "write", },
196 { "prefetch", "prefetches", "speculative-read", "speculative-load", },
197 };
198
199 const char *perf_evsel__hw_cache_result[PERF_COUNT_HW_CACHE_RESULT_MAX]
200 [PERF_EVSEL__MAX_ALIASES] = {
201 { "refs", "Reference", "ops", "access", },
202 { "misses", "miss", },
203 };
204
205 #define C(x) PERF_COUNT_HW_CACHE_##x
206 #define CACHE_READ (1 << C(OP_READ))
207 #define CACHE_WRITE (1 << C(OP_WRITE))
208 #define CACHE_PREFETCH (1 << C(OP_PREFETCH))
209 #define COP(x) (1 << x)
210
211 /*
212 * cache operartion stat
213 * L1I : Read and prefetch only
214 * ITLB and BPU : Read-only
215 */
216 static unsigned long perf_evsel__hw_cache_stat[C(MAX)] = {
217 [C(L1D)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
218 [C(L1I)] = (CACHE_READ | CACHE_PREFETCH),
219 [C(LL)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
220 [C(DTLB)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
221 [C(ITLB)] = (CACHE_READ),
222 [C(BPU)] = (CACHE_READ),
223 [C(NODE)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
224 };
225
226 bool perf_evsel__is_cache_op_valid(u8 type, u8 op)
227 {
228 if (perf_evsel__hw_cache_stat[type] & COP(op))
229 return true; /* valid */
230 else
231 return false; /* invalid */
232 }
233
234 int __perf_evsel__hw_cache_type_op_res_name(u8 type, u8 op, u8 result,
235 char *bf, size_t size)
236 {
237 if (result) {
238 return scnprintf(bf, size, "%s-%s-%s", perf_evsel__hw_cache[type][0],
239 perf_evsel__hw_cache_op[op][0],
240 perf_evsel__hw_cache_result[result][0]);
241 }
242
243 return scnprintf(bf, size, "%s-%s", perf_evsel__hw_cache[type][0],
244 perf_evsel__hw_cache_op[op][1]);
245 }
246
247 static int __perf_evsel__hw_cache_name(u64 config, char *bf, size_t size)
248 {
249 u8 op, result, type = (config >> 0) & 0xff;
250 const char *err = "unknown-ext-hardware-cache-type";
251
252 if (type > PERF_COUNT_HW_CACHE_MAX)
253 goto out_err;
254
255 op = (config >> 8) & 0xff;
256 err = "unknown-ext-hardware-cache-op";
257 if (op > PERF_COUNT_HW_CACHE_OP_MAX)
258 goto out_err;
259
260 result = (config >> 16) & 0xff;
261 err = "unknown-ext-hardware-cache-result";
262 if (result > PERF_COUNT_HW_CACHE_RESULT_MAX)
263 goto out_err;
264
265 err = "invalid-cache";
266 if (!perf_evsel__is_cache_op_valid(type, op))
267 goto out_err;
268
269 return __perf_evsel__hw_cache_type_op_res_name(type, op, result, bf, size);
270 out_err:
271 return scnprintf(bf, size, "%s", err);
272 }
273
274 static int perf_evsel__hw_cache_name(struct perf_evsel *evsel, char *bf, size_t size)
275 {
276 int ret = __perf_evsel__hw_cache_name(evsel->attr.config, bf, size);
277 return ret + perf_evsel__add_modifiers(evsel, bf + ret, size - ret);
278 }
279
280 static int perf_evsel__raw_name(struct perf_evsel *evsel, char *bf, size_t size)
281 {
282 int ret = scnprintf(bf, size, "raw 0x%" PRIx64, evsel->attr.config);
283 return ret + perf_evsel__add_modifiers(evsel, bf + ret, size - ret);
284 }
285
286 const char *perf_evsel__name(struct perf_evsel *evsel)
287 {
288 char bf[128];
289
290 if (evsel->name)
291 return evsel->name;
292
293 switch (evsel->attr.type) {
294 case PERF_TYPE_RAW:
295 perf_evsel__raw_name(evsel, bf, sizeof(bf));
296 break;
297
298 case PERF_TYPE_HARDWARE:
299 perf_evsel__hw_name(evsel, bf, sizeof(bf));
300 break;
301
302 case PERF_TYPE_HW_CACHE:
303 perf_evsel__hw_cache_name(evsel, bf, sizeof(bf));
304 break;
305
306 case PERF_TYPE_SOFTWARE:
307 perf_evsel__sw_name(evsel, bf, sizeof(bf));
308 break;
309
310 case PERF_TYPE_TRACEPOINT:
311 scnprintf(bf, sizeof(bf), "%s", "unknown tracepoint");
312 break;
313
314 case PERF_TYPE_BREAKPOINT:
315 perf_evsel__bp_name(evsel, bf, sizeof(bf));
316 break;
317
318 default:
319 scnprintf(bf, sizeof(bf), "%s", "unknown attr type");
320 break;
321 }
322
323 evsel->name = strdup(bf);
324
325 return evsel->name ?: "unknown";
326 }
327
328 void perf_evsel__config(struct perf_evsel *evsel, struct perf_record_opts *opts,
329 struct perf_evsel *first)
330 {
331 struct perf_event_attr *attr = &evsel->attr;
332 int track = !evsel->idx; /* only the first counter needs these */
333
334 attr->disabled = 1;
335 attr->sample_id_all = opts->sample_id_all_missing ? 0 : 1;
336 attr->inherit = !opts->no_inherit;
337 attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
338 PERF_FORMAT_TOTAL_TIME_RUNNING |
339 PERF_FORMAT_ID;
340
341 attr->sample_type |= PERF_SAMPLE_IP | PERF_SAMPLE_TID;
342
343 /*
344 * We default some events to a 1 default interval. But keep
345 * it a weak assumption overridable by the user.
346 */
347 if (!attr->sample_period || (opts->user_freq != UINT_MAX &&
348 opts->user_interval != ULLONG_MAX)) {
349 if (opts->freq) {
350 attr->sample_type |= PERF_SAMPLE_PERIOD;
351 attr->freq = 1;
352 attr->sample_freq = opts->freq;
353 } else {
354 attr->sample_period = opts->default_interval;
355 }
356 }
357
358 if (opts->no_samples)
359 attr->sample_freq = 0;
360
361 if (opts->inherit_stat)
362 attr->inherit_stat = 1;
363
364 if (opts->sample_address) {
365 attr->sample_type |= PERF_SAMPLE_ADDR;
366 attr->mmap_data = track;
367 }
368
369 if (opts->call_graph)
370 attr->sample_type |= PERF_SAMPLE_CALLCHAIN;
371
372 if (perf_target__has_cpu(&opts->target))
373 attr->sample_type |= PERF_SAMPLE_CPU;
374
375 if (opts->period)
376 attr->sample_type |= PERF_SAMPLE_PERIOD;
377
378 if (!opts->sample_id_all_missing &&
379 (opts->sample_time || !opts->no_inherit ||
380 perf_target__has_cpu(&opts->target)))
381 attr->sample_type |= PERF_SAMPLE_TIME;
382
383 if (opts->raw_samples) {
384 attr->sample_type |= PERF_SAMPLE_TIME;
385 attr->sample_type |= PERF_SAMPLE_RAW;
386 attr->sample_type |= PERF_SAMPLE_CPU;
387 }
388
389 if (opts->no_delay) {
390 attr->watermark = 0;
391 attr->wakeup_events = 1;
392 }
393 if (opts->branch_stack) {
394 attr->sample_type |= PERF_SAMPLE_BRANCH_STACK;
395 attr->branch_sample_type = opts->branch_stack;
396 }
397
398 attr->mmap = track;
399 attr->comm = track;
400
401 if (perf_target__none(&opts->target) &&
402 (!opts->group || evsel == first)) {
403 attr->enable_on_exec = 1;
404 }
405 }
406
407 int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads)
408 {
409 int cpu, thread;
410 evsel->fd = xyarray__new(ncpus, nthreads, sizeof(int));
411
412 if (evsel->fd) {
413 for (cpu = 0; cpu < ncpus; cpu++) {
414 for (thread = 0; thread < nthreads; thread++) {
415 FD(evsel, cpu, thread) = -1;
416 }
417 }
418 }
419
420 return evsel->fd != NULL ? 0 : -ENOMEM;
421 }
422
423 int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads)
424 {
425 evsel->sample_id = xyarray__new(ncpus, nthreads, sizeof(struct perf_sample_id));
426 if (evsel->sample_id == NULL)
427 return -ENOMEM;
428
429 evsel->id = zalloc(ncpus * nthreads * sizeof(u64));
430 if (evsel->id == NULL) {
431 xyarray__delete(evsel->sample_id);
432 evsel->sample_id = NULL;
433 return -ENOMEM;
434 }
435
436 return 0;
437 }
438
439 int perf_evsel__alloc_counts(struct perf_evsel *evsel, int ncpus)
440 {
441 evsel->counts = zalloc((sizeof(*evsel->counts) +
442 (ncpus * sizeof(struct perf_counts_values))));
443 return evsel->counts != NULL ? 0 : -ENOMEM;
444 }
445
446 void perf_evsel__free_fd(struct perf_evsel *evsel)
447 {
448 xyarray__delete(evsel->fd);
449 evsel->fd = NULL;
450 }
451
452 void perf_evsel__free_id(struct perf_evsel *evsel)
453 {
454 xyarray__delete(evsel->sample_id);
455 evsel->sample_id = NULL;
456 free(evsel->id);
457 evsel->id = NULL;
458 }
459
460 void perf_evsel__close_fd(struct perf_evsel *evsel, int ncpus, int nthreads)
461 {
462 int cpu, thread;
463
464 for (cpu = 0; cpu < ncpus; cpu++)
465 for (thread = 0; thread < nthreads; ++thread) {
466 close(FD(evsel, cpu, thread));
467 FD(evsel, cpu, thread) = -1;
468 }
469 }
470
471 void perf_evsel__exit(struct perf_evsel *evsel)
472 {
473 assert(list_empty(&evsel->node));
474 xyarray__delete(evsel->fd);
475 xyarray__delete(evsel->sample_id);
476 free(evsel->id);
477 }
478
479 void perf_evsel__delete(struct perf_evsel *evsel)
480 {
481 perf_evsel__exit(evsel);
482 close_cgroup(evsel->cgrp);
483 free(evsel->name);
484 free(evsel);
485 }
486
487 int __perf_evsel__read_on_cpu(struct perf_evsel *evsel,
488 int cpu, int thread, bool scale)
489 {
490 struct perf_counts_values count;
491 size_t nv = scale ? 3 : 1;
492
493 if (FD(evsel, cpu, thread) < 0)
494 return -EINVAL;
495
496 if (evsel->counts == NULL && perf_evsel__alloc_counts(evsel, cpu + 1) < 0)
497 return -ENOMEM;
498
499 if (readn(FD(evsel, cpu, thread), &count, nv * sizeof(u64)) < 0)
500 return -errno;
501
502 if (scale) {
503 if (count.run == 0)
504 count.val = 0;
505 else if (count.run < count.ena)
506 count.val = (u64)((double)count.val * count.ena / count.run + 0.5);
507 } else
508 count.ena = count.run = 0;
509
510 evsel->counts->cpu[cpu] = count;
511 return 0;
512 }
513
514 int __perf_evsel__read(struct perf_evsel *evsel,
515 int ncpus, int nthreads, bool scale)
516 {
517 size_t nv = scale ? 3 : 1;
518 int cpu, thread;
519 struct perf_counts_values *aggr = &evsel->counts->aggr, count;
520
521 aggr->val = aggr->ena = aggr->run = 0;
522
523 for (cpu = 0; cpu < ncpus; cpu++) {
524 for (thread = 0; thread < nthreads; thread++) {
525 if (FD(evsel, cpu, thread) < 0)
526 continue;
527
528 if (readn(FD(evsel, cpu, thread),
529 &count, nv * sizeof(u64)) < 0)
530 return -errno;
531
532 aggr->val += count.val;
533 if (scale) {
534 aggr->ena += count.ena;
535 aggr->run += count.run;
536 }
537 }
538 }
539
540 evsel->counts->scaled = 0;
541 if (scale) {
542 if (aggr->run == 0) {
543 evsel->counts->scaled = -1;
544 aggr->val = 0;
545 return 0;
546 }
547
548 if (aggr->run < aggr->ena) {
549 evsel->counts->scaled = 1;
550 aggr->val = (u64)((double)aggr->val * aggr->ena / aggr->run + 0.5);
551 }
552 } else
553 aggr->ena = aggr->run = 0;
554
555 return 0;
556 }
557
558 static int __perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
559 struct thread_map *threads, bool group,
560 struct xyarray *group_fds)
561 {
562 int cpu, thread;
563 unsigned long flags = 0;
564 int pid = -1, err;
565
566 if (evsel->fd == NULL &&
567 perf_evsel__alloc_fd(evsel, cpus->nr, threads->nr) < 0)
568 return -ENOMEM;
569
570 if (evsel->cgrp) {
571 flags = PERF_FLAG_PID_CGROUP;
572 pid = evsel->cgrp->fd;
573 }
574
575 for (cpu = 0; cpu < cpus->nr; cpu++) {
576 int group_fd = group_fds ? GROUP_FD(group_fds, cpu) : -1;
577
578 for (thread = 0; thread < threads->nr; thread++) {
579
580 if (!evsel->cgrp)
581 pid = threads->map[thread];
582
583 FD(evsel, cpu, thread) = sys_perf_event_open(&evsel->attr,
584 pid,
585 cpus->map[cpu],
586 group_fd, flags);
587 if (FD(evsel, cpu, thread) < 0) {
588 err = -errno;
589 goto out_close;
590 }
591
592 if (group && group_fd == -1)
593 group_fd = FD(evsel, cpu, thread);
594 }
595 }
596
597 return 0;
598
599 out_close:
600 do {
601 while (--thread >= 0) {
602 close(FD(evsel, cpu, thread));
603 FD(evsel, cpu, thread) = -1;
604 }
605 thread = threads->nr;
606 } while (--cpu >= 0);
607 return err;
608 }
609
610 void perf_evsel__close(struct perf_evsel *evsel, int ncpus, int nthreads)
611 {
612 if (evsel->fd == NULL)
613 return;
614
615 perf_evsel__close_fd(evsel, ncpus, nthreads);
616 perf_evsel__free_fd(evsel);
617 evsel->fd = NULL;
618 }
619
620 static struct {
621 struct cpu_map map;
622 int cpus[1];
623 } empty_cpu_map = {
624 .map.nr = 1,
625 .cpus = { -1, },
626 };
627
628 static struct {
629 struct thread_map map;
630 int threads[1];
631 } empty_thread_map = {
632 .map.nr = 1,
633 .threads = { -1, },
634 };
635
636 int perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
637 struct thread_map *threads, bool group,
638 struct xyarray *group_fd)
639 {
640 if (cpus == NULL) {
641 /* Work around old compiler warnings about strict aliasing */
642 cpus = &empty_cpu_map.map;
643 }
644
645 if (threads == NULL)
646 threads = &empty_thread_map.map;
647
648 return __perf_evsel__open(evsel, cpus, threads, group, group_fd);
649 }
650
651 int perf_evsel__open_per_cpu(struct perf_evsel *evsel,
652 struct cpu_map *cpus, bool group,
653 struct xyarray *group_fd)
654 {
655 return __perf_evsel__open(evsel, cpus, &empty_thread_map.map, group,
656 group_fd);
657 }
658
659 int perf_evsel__open_per_thread(struct perf_evsel *evsel,
660 struct thread_map *threads, bool group,
661 struct xyarray *group_fd)
662 {
663 return __perf_evsel__open(evsel, &empty_cpu_map.map, threads, group,
664 group_fd);
665 }
666
667 static int perf_event__parse_id_sample(const union perf_event *event, u64 type,
668 struct perf_sample *sample,
669 bool swapped)
670 {
671 const u64 *array = event->sample.array;
672 union u64_swap u;
673
674 array += ((event->header.size -
675 sizeof(event->header)) / sizeof(u64)) - 1;
676
677 if (type & PERF_SAMPLE_CPU) {
678 u.val64 = *array;
679 if (swapped) {
680 /* undo swap of u64, then swap on individual u32s */
681 u.val64 = bswap_64(u.val64);
682 u.val32[0] = bswap_32(u.val32[0]);
683 }
684
685 sample->cpu = u.val32[0];
686 array--;
687 }
688
689 if (type & PERF_SAMPLE_STREAM_ID) {
690 sample->stream_id = *array;
691 array--;
692 }
693
694 if (type & PERF_SAMPLE_ID) {
695 sample->id = *array;
696 array--;
697 }
698
699 if (type & PERF_SAMPLE_TIME) {
700 sample->time = *array;
701 array--;
702 }
703
704 if (type & PERF_SAMPLE_TID) {
705 u.val64 = *array;
706 if (swapped) {
707 /* undo swap of u64, then swap on individual u32s */
708 u.val64 = bswap_64(u.val64);
709 u.val32[0] = bswap_32(u.val32[0]);
710 u.val32[1] = bswap_32(u.val32[1]);
711 }
712
713 sample->pid = u.val32[0];
714 sample->tid = u.val32[1];
715 }
716
717 return 0;
718 }
719
720 static bool sample_overlap(const union perf_event *event,
721 const void *offset, u64 size)
722 {
723 const void *base = event;
724
725 if (offset + size > base + event->header.size)
726 return true;
727
728 return false;
729 }
730
731 int perf_event__parse_sample(const union perf_event *event, u64 type,
732 int sample_size, bool sample_id_all,
733 struct perf_sample *data, bool swapped)
734 {
735 const u64 *array;
736
737 /*
738 * used for cross-endian analysis. See git commit 65014ab3
739 * for why this goofiness is needed.
740 */
741 union u64_swap u;
742
743 memset(data, 0, sizeof(*data));
744 data->cpu = data->pid = data->tid = -1;
745 data->stream_id = data->id = data->time = -1ULL;
746 data->period = 1;
747
748 if (event->header.type != PERF_RECORD_SAMPLE) {
749 if (!sample_id_all)
750 return 0;
751 return perf_event__parse_id_sample(event, type, data, swapped);
752 }
753
754 array = event->sample.array;
755
756 if (sample_size + sizeof(event->header) > event->header.size)
757 return -EFAULT;
758
759 if (type & PERF_SAMPLE_IP) {
760 data->ip = event->ip.ip;
761 array++;
762 }
763
764 if (type & PERF_SAMPLE_TID) {
765 u.val64 = *array;
766 if (swapped) {
767 /* undo swap of u64, then swap on individual u32s */
768 u.val64 = bswap_64(u.val64);
769 u.val32[0] = bswap_32(u.val32[0]);
770 u.val32[1] = bswap_32(u.val32[1]);
771 }
772
773 data->pid = u.val32[0];
774 data->tid = u.val32[1];
775 array++;
776 }
777
778 if (type & PERF_SAMPLE_TIME) {
779 data->time = *array;
780 array++;
781 }
782
783 data->addr = 0;
784 if (type & PERF_SAMPLE_ADDR) {
785 data->addr = *array;
786 array++;
787 }
788
789 data->id = -1ULL;
790 if (type & PERF_SAMPLE_ID) {
791 data->id = *array;
792 array++;
793 }
794
795 if (type & PERF_SAMPLE_STREAM_ID) {
796 data->stream_id = *array;
797 array++;
798 }
799
800 if (type & PERF_SAMPLE_CPU) {
801
802 u.val64 = *array;
803 if (swapped) {
804 /* undo swap of u64, then swap on individual u32s */
805 u.val64 = bswap_64(u.val64);
806 u.val32[0] = bswap_32(u.val32[0]);
807 }
808
809 data->cpu = u.val32[0];
810 array++;
811 }
812
813 if (type & PERF_SAMPLE_PERIOD) {
814 data->period = *array;
815 array++;
816 }
817
818 if (type & PERF_SAMPLE_READ) {
819 fprintf(stderr, "PERF_SAMPLE_READ is unsupported for now\n");
820 return -1;
821 }
822
823 if (type & PERF_SAMPLE_CALLCHAIN) {
824 if (sample_overlap(event, array, sizeof(data->callchain->nr)))
825 return -EFAULT;
826
827 data->callchain = (struct ip_callchain *)array;
828
829 if (sample_overlap(event, array, data->callchain->nr))
830 return -EFAULT;
831
832 array += 1 + data->callchain->nr;
833 }
834
835 if (type & PERF_SAMPLE_RAW) {
836 const u64 *pdata;
837
838 u.val64 = *array;
839 if (WARN_ONCE(swapped,
840 "Endianness of raw data not corrected!\n")) {
841 /* undo swap of u64, then swap on individual u32s */
842 u.val64 = bswap_64(u.val64);
843 u.val32[0] = bswap_32(u.val32[0]);
844 u.val32[1] = bswap_32(u.val32[1]);
845 }
846
847 if (sample_overlap(event, array, sizeof(u32)))
848 return -EFAULT;
849
850 data->raw_size = u.val32[0];
851 pdata = (void *) array + sizeof(u32);
852
853 if (sample_overlap(event, pdata, data->raw_size))
854 return -EFAULT;
855
856 data->raw_data = (void *) pdata;
857
858 array = (void *)array + data->raw_size + sizeof(u32);
859 }
860
861 if (type & PERF_SAMPLE_BRANCH_STACK) {
862 u64 sz;
863
864 data->branch_stack = (struct branch_stack *)array;
865 array++; /* nr */
866
867 sz = data->branch_stack->nr * sizeof(struct branch_entry);
868 sz /= sizeof(u64);
869 array += sz;
870 }
871 return 0;
872 }
873
874 int perf_event__synthesize_sample(union perf_event *event, u64 type,
875 const struct perf_sample *sample,
876 bool swapped)
877 {
878 u64 *array;
879
880 /*
881 * used for cross-endian analysis. See git commit 65014ab3
882 * for why this goofiness is needed.
883 */
884 union u64_swap u;
885
886 array = event->sample.array;
887
888 if (type & PERF_SAMPLE_IP) {
889 event->ip.ip = sample->ip;
890 array++;
891 }
892
893 if (type & PERF_SAMPLE_TID) {
894 u.val32[0] = sample->pid;
895 u.val32[1] = sample->tid;
896 if (swapped) {
897 /*
898 * Inverse of what is done in perf_event__parse_sample
899 */
900 u.val32[0] = bswap_32(u.val32[0]);
901 u.val32[1] = bswap_32(u.val32[1]);
902 u.val64 = bswap_64(u.val64);
903 }
904
905 *array = u.val64;
906 array++;
907 }
908
909 if (type & PERF_SAMPLE_TIME) {
910 *array = sample->time;
911 array++;
912 }
913
914 if (type & PERF_SAMPLE_ADDR) {
915 *array = sample->addr;
916 array++;
917 }
918
919 if (type & PERF_SAMPLE_ID) {
920 *array = sample->id;
921 array++;
922 }
923
924 if (type & PERF_SAMPLE_STREAM_ID) {
925 *array = sample->stream_id;
926 array++;
927 }
928
929 if (type & PERF_SAMPLE_CPU) {
930 u.val32[0] = sample->cpu;
931 if (swapped) {
932 /*
933 * Inverse of what is done in perf_event__parse_sample
934 */
935 u.val32[0] = bswap_32(u.val32[0]);
936 u.val64 = bswap_64(u.val64);
937 }
938 *array = u.val64;
939 array++;
940 }
941
942 if (type & PERF_SAMPLE_PERIOD) {
943 *array = sample->period;
944 array++;
945 }
946
947 return 0;
948 }
Linux kernel - Deliverables
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