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Merge tag 'byteswap-for-linus-20121219' of git://git.infradead.org/users/dwmw2/byteswap
[deliverable/linux.git] / tools / perf / util / session.c
1 #define _FILE_OFFSET_BITS 64
2
3 #include <linux/kernel.h>
4
5 #include <byteswap.h>
6 #include <unistd.h>
7 #include <sys/types.h>
8 #include <sys/mman.h>
9
10 #include "evlist.h"
11 #include "evsel.h"
12 #include "session.h"
13 #include "tool.h"
14 #include "sort.h"
15 #include "util.h"
16 #include "cpumap.h"
17 #include "event-parse.h"
18 #include "perf_regs.h"
19 #include "unwind.h"
20 #include "vdso.h"
21
22 static int perf_session__open(struct perf_session *self, bool force)
23 {
24 struct stat input_stat;
25
26 if (!strcmp(self->filename, "-")) {
27 self->fd_pipe = true;
28 self->fd = STDIN_FILENO;
29
30 if (perf_session__read_header(self, self->fd) < 0)
31 pr_err("incompatible file format (rerun with -v to learn more)");
32
33 return 0;
34 }
35
36 self->fd = open(self->filename, O_RDONLY);
37 if (self->fd < 0) {
38 int err = errno;
39
40 pr_err("failed to open %s: %s", self->filename, strerror(err));
41 if (err == ENOENT && !strcmp(self->filename, "perf.data"))
42 pr_err(" (try 'perf record' first)");
43 pr_err("\n");
44 return -errno;
45 }
46
47 if (fstat(self->fd, &input_stat) < 0)
48 goto out_close;
49
50 if (!force && input_stat.st_uid && (input_stat.st_uid != geteuid())) {
51 pr_err("file %s not owned by current user or root\n",
52 self->filename);
53 goto out_close;
54 }
55
56 if (!input_stat.st_size) {
57 pr_info("zero-sized file (%s), nothing to do!\n",
58 self->filename);
59 goto out_close;
60 }
61
62 if (perf_session__read_header(self, self->fd) < 0) {
63 pr_err("incompatible file format (rerun with -v to learn more)");
64 goto out_close;
65 }
66
67 if (!perf_evlist__valid_sample_type(self->evlist)) {
68 pr_err("non matching sample_type");
69 goto out_close;
70 }
71
72 if (!perf_evlist__valid_sample_id_all(self->evlist)) {
73 pr_err("non matching sample_id_all");
74 goto out_close;
75 }
76
77 self->size = input_stat.st_size;
78 return 0;
79
80 out_close:
81 close(self->fd);
82 self->fd = -1;
83 return -1;
84 }
85
86 void perf_session__set_id_hdr_size(struct perf_session *session)
87 {
88 u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist);
89
90 session->host_machine.id_hdr_size = id_hdr_size;
91 machines__set_id_hdr_size(&session->machines, id_hdr_size);
92 }
93
94 int perf_session__create_kernel_maps(struct perf_session *self)
95 {
96 int ret = machine__create_kernel_maps(&self->host_machine);
97
98 if (ret >= 0)
99 ret = machines__create_guest_kernel_maps(&self->machines);
100 return ret;
101 }
102
103 static void perf_session__destroy_kernel_maps(struct perf_session *self)
104 {
105 machine__destroy_kernel_maps(&self->host_machine);
106 machines__destroy_guest_kernel_maps(&self->machines);
107 }
108
109 struct perf_session *perf_session__new(const char *filename, int mode,
110 bool force, bool repipe,
111 struct perf_tool *tool)
112 {
113 struct perf_session *self;
114 struct stat st;
115 size_t len;
116
117 if (!filename || !strlen(filename)) {
118 if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode))
119 filename = "-";
120 else
121 filename = "perf.data";
122 }
123
124 len = strlen(filename);
125 self = zalloc(sizeof(*self) + len);
126
127 if (self == NULL)
128 goto out;
129
130 memcpy(self->filename, filename, len);
131 /*
132 * On 64bit we can mmap the data file in one go. No need for tiny mmap
133 * slices. On 32bit we use 32MB.
134 */
135 #if BITS_PER_LONG == 64
136 self->mmap_window = ULLONG_MAX;
137 #else
138 self->mmap_window = 32 * 1024 * 1024ULL;
139 #endif
140 self->machines = RB_ROOT;
141 self->repipe = repipe;
142 INIT_LIST_HEAD(&self->ordered_samples.samples);
143 INIT_LIST_HEAD(&self->ordered_samples.sample_cache);
144 INIT_LIST_HEAD(&self->ordered_samples.to_free);
145 machine__init(&self->host_machine, "", HOST_KERNEL_ID);
146 hists__init(&self->hists);
147
148 if (mode == O_RDONLY) {
149 if (perf_session__open(self, force) < 0)
150 goto out_delete;
151 perf_session__set_id_hdr_size(self);
152 } else if (mode == O_WRONLY) {
153 /*
154 * In O_RDONLY mode this will be performed when reading the
155 * kernel MMAP event, in perf_event__process_mmap().
156 */
157 if (perf_session__create_kernel_maps(self) < 0)
158 goto out_delete;
159 }
160
161 if (tool && tool->ordering_requires_timestamps &&
162 tool->ordered_samples && !perf_evlist__sample_id_all(self->evlist)) {
163 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n");
164 tool->ordered_samples = false;
165 }
166
167 out:
168 return self;
169 out_delete:
170 perf_session__delete(self);
171 return NULL;
172 }
173
174 static void machine__delete_dead_threads(struct machine *machine)
175 {
176 struct thread *n, *t;
177
178 list_for_each_entry_safe(t, n, &machine->dead_threads, node) {
179 list_del(&t->node);
180 thread__delete(t);
181 }
182 }
183
184 static void perf_session__delete_dead_threads(struct perf_session *session)
185 {
186 machine__delete_dead_threads(&session->host_machine);
187 }
188
189 static void machine__delete_threads(struct machine *self)
190 {
191 struct rb_node *nd = rb_first(&self->threads);
192
193 while (nd) {
194 struct thread *t = rb_entry(nd, struct thread, rb_node);
195
196 rb_erase(&t->rb_node, &self->threads);
197 nd = rb_next(nd);
198 thread__delete(t);
199 }
200 }
201
202 static void perf_session__delete_threads(struct perf_session *session)
203 {
204 machine__delete_threads(&session->host_machine);
205 }
206
207 void perf_session__delete(struct perf_session *self)
208 {
209 perf_session__destroy_kernel_maps(self);
210 perf_session__delete_dead_threads(self);
211 perf_session__delete_threads(self);
212 machine__exit(&self->host_machine);
213 close(self->fd);
214 free(self);
215 vdso__exit();
216 }
217
218 void machine__remove_thread(struct machine *self, struct thread *th)
219 {
220 self->last_match = NULL;
221 rb_erase(&th->rb_node, &self->threads);
222 /*
223 * We may have references to this thread, for instance in some hist_entry
224 * instances, so just move them to a separate list.
225 */
226 list_add_tail(&th->node, &self->dead_threads);
227 }
228
229 static bool symbol__match_parent_regex(struct symbol *sym)
230 {
231 if (sym->name && !regexec(&parent_regex, sym->name, 0, NULL, 0))
232 return 1;
233
234 return 0;
235 }
236
237 static const u8 cpumodes[] = {
238 PERF_RECORD_MISC_USER,
239 PERF_RECORD_MISC_KERNEL,
240 PERF_RECORD_MISC_GUEST_USER,
241 PERF_RECORD_MISC_GUEST_KERNEL
242 };
243 #define NCPUMODES (sizeof(cpumodes)/sizeof(u8))
244
245 static void ip__resolve_ams(struct machine *self, struct thread *thread,
246 struct addr_map_symbol *ams,
247 u64 ip)
248 {
249 struct addr_location al;
250 size_t i;
251 u8 m;
252
253 memset(&al, 0, sizeof(al));
254
255 for (i = 0; i < NCPUMODES; i++) {
256 m = cpumodes[i];
257 /*
258 * We cannot use the header.misc hint to determine whether a
259 * branch stack address is user, kernel, guest, hypervisor.
260 * Branches may straddle the kernel/user/hypervisor boundaries.
261 * Thus, we have to try consecutively until we find a match
262 * or else, the symbol is unknown
263 */
264 thread__find_addr_location(thread, self, m, MAP__FUNCTION,
265 ip, &al, NULL);
266 if (al.sym)
267 goto found;
268 }
269 found:
270 ams->addr = ip;
271 ams->al_addr = al.addr;
272 ams->sym = al.sym;
273 ams->map = al.map;
274 }
275
276 struct branch_info *machine__resolve_bstack(struct machine *self,
277 struct thread *thr,
278 struct branch_stack *bs)
279 {
280 struct branch_info *bi;
281 unsigned int i;
282
283 bi = calloc(bs->nr, sizeof(struct branch_info));
284 if (!bi)
285 return NULL;
286
287 for (i = 0; i < bs->nr; i++) {
288 ip__resolve_ams(self, thr, &bi[i].to, bs->entries[i].to);
289 ip__resolve_ams(self, thr, &bi[i].from, bs->entries[i].from);
290 bi[i].flags = bs->entries[i].flags;
291 }
292 return bi;
293 }
294
295 static int machine__resolve_callchain_sample(struct machine *machine,
296 struct thread *thread,
297 struct ip_callchain *chain,
298 struct symbol **parent)
299
300 {
301 u8 cpumode = PERF_RECORD_MISC_USER;
302 unsigned int i;
303 int err;
304
305 callchain_cursor_reset(&callchain_cursor);
306
307 if (chain->nr > PERF_MAX_STACK_DEPTH) {
308 pr_warning("corrupted callchain. skipping...\n");
309 return 0;
310 }
311
312 for (i = 0; i < chain->nr; i++) {
313 u64 ip;
314 struct addr_location al;
315
316 if (callchain_param.order == ORDER_CALLEE)
317 ip = chain->ips[i];
318 else
319 ip = chain->ips[chain->nr - i - 1];
320
321 if (ip >= PERF_CONTEXT_MAX) {
322 switch (ip) {
323 case PERF_CONTEXT_HV:
324 cpumode = PERF_RECORD_MISC_HYPERVISOR;
325 break;
326 case PERF_CONTEXT_KERNEL:
327 cpumode = PERF_RECORD_MISC_KERNEL;
328 break;
329 case PERF_CONTEXT_USER:
330 cpumode = PERF_RECORD_MISC_USER;
331 break;
332 default:
333 pr_debug("invalid callchain context: "
334 "%"PRId64"\n", (s64) ip);
335 /*
336 * It seems the callchain is corrupted.
337 * Discard all.
338 */
339 callchain_cursor_reset(&callchain_cursor);
340 return 0;
341 }
342 continue;
343 }
344
345 al.filtered = false;
346 thread__find_addr_location(thread, machine, cpumode,
347 MAP__FUNCTION, ip, &al, NULL);
348 if (al.sym != NULL) {
349 if (sort__has_parent && !*parent &&
350 symbol__match_parent_regex(al.sym))
351 *parent = al.sym;
352 if (!symbol_conf.use_callchain)
353 break;
354 }
355
356 err = callchain_cursor_append(&callchain_cursor,
357 ip, al.map, al.sym);
358 if (err)
359 return err;
360 }
361
362 return 0;
363 }
364
365 static int unwind_entry(struct unwind_entry *entry, void *arg)
366 {
367 struct callchain_cursor *cursor = arg;
368 return callchain_cursor_append(cursor, entry->ip,
369 entry->map, entry->sym);
370 }
371
372 int machine__resolve_callchain(struct machine *machine,
373 struct perf_evsel *evsel,
374 struct thread *thread,
375 struct perf_sample *sample,
376 struct symbol **parent)
377
378 {
379 int ret;
380
381 callchain_cursor_reset(&callchain_cursor);
382
383 ret = machine__resolve_callchain_sample(machine, thread,
384 sample->callchain, parent);
385 if (ret)
386 return ret;
387
388 /* Can we do dwarf post unwind? */
389 if (!((evsel->attr.sample_type & PERF_SAMPLE_REGS_USER) &&
390 (evsel->attr.sample_type & PERF_SAMPLE_STACK_USER)))
391 return 0;
392
393 /* Bail out if nothing was captured. */
394 if ((!sample->user_regs.regs) ||
395 (!sample->user_stack.size))
396 return 0;
397
398 return unwind__get_entries(unwind_entry, &callchain_cursor, machine,
399 thread, evsel->attr.sample_regs_user,
400 sample);
401
402 }
403
404 static int process_event_synth_tracing_data_stub(union perf_event *event
405 __maybe_unused,
406 struct perf_session *session
407 __maybe_unused)
408 {
409 dump_printf(": unhandled!\n");
410 return 0;
411 }
412
413 static int process_event_synth_attr_stub(union perf_event *event __maybe_unused,
414 struct perf_evlist **pevlist
415 __maybe_unused)
416 {
417 dump_printf(": unhandled!\n");
418 return 0;
419 }
420
421 static int process_event_sample_stub(struct perf_tool *tool __maybe_unused,
422 union perf_event *event __maybe_unused,
423 struct perf_sample *sample __maybe_unused,
424 struct perf_evsel *evsel __maybe_unused,
425 struct machine *machine __maybe_unused)
426 {
427 dump_printf(": unhandled!\n");
428 return 0;
429 }
430
431 static int process_event_stub(struct perf_tool *tool __maybe_unused,
432 union perf_event *event __maybe_unused,
433 struct perf_sample *sample __maybe_unused,
434 struct machine *machine __maybe_unused)
435 {
436 dump_printf(": unhandled!\n");
437 return 0;
438 }
439
440 static int process_finished_round_stub(struct perf_tool *tool __maybe_unused,
441 union perf_event *event __maybe_unused,
442 struct perf_session *perf_session
443 __maybe_unused)
444 {
445 dump_printf(": unhandled!\n");
446 return 0;
447 }
448
449 static int process_event_type_stub(struct perf_tool *tool __maybe_unused,
450 union perf_event *event __maybe_unused)
451 {
452 dump_printf(": unhandled!\n");
453 return 0;
454 }
455
456 static int process_finished_round(struct perf_tool *tool,
457 union perf_event *event,
458 struct perf_session *session);
459
460 static void perf_tool__fill_defaults(struct perf_tool *tool)
461 {
462 if (tool->sample == NULL)
463 tool->sample = process_event_sample_stub;
464 if (tool->mmap == NULL)
465 tool->mmap = process_event_stub;
466 if (tool->comm == NULL)
467 tool->comm = process_event_stub;
468 if (tool->fork == NULL)
469 tool->fork = process_event_stub;
470 if (tool->exit == NULL)
471 tool->exit = process_event_stub;
472 if (tool->lost == NULL)
473 tool->lost = perf_event__process_lost;
474 if (tool->read == NULL)
475 tool->read = process_event_sample_stub;
476 if (tool->throttle == NULL)
477 tool->throttle = process_event_stub;
478 if (tool->unthrottle == NULL)
479 tool->unthrottle = process_event_stub;
480 if (tool->attr == NULL)
481 tool->attr = process_event_synth_attr_stub;
482 if (tool->event_type == NULL)
483 tool->event_type = process_event_type_stub;
484 if (tool->tracing_data == NULL)
485 tool->tracing_data = process_event_synth_tracing_data_stub;
486 if (tool->build_id == NULL)
487 tool->build_id = process_finished_round_stub;
488 if (tool->finished_round == NULL) {
489 if (tool->ordered_samples)
490 tool->finished_round = process_finished_round;
491 else
492 tool->finished_round = process_finished_round_stub;
493 }
494 }
495
496 void mem_bswap_32(void *src, int byte_size)
497 {
498 u32 *m = src;
499 while (byte_size > 0) {
500 *m = bswap_32(*m);
501 byte_size -= sizeof(u32);
502 ++m;
503 }
504 }
505
506 void mem_bswap_64(void *src, int byte_size)
507 {
508 u64 *m = src;
509
510 while (byte_size > 0) {
511 *m = bswap_64(*m);
512 byte_size -= sizeof(u64);
513 ++m;
514 }
515 }
516
517 static void swap_sample_id_all(union perf_event *event, void *data)
518 {
519 void *end = (void *) event + event->header.size;
520 int size = end - data;
521
522 BUG_ON(size % sizeof(u64));
523 mem_bswap_64(data, size);
524 }
525
526 static void perf_event__all64_swap(union perf_event *event,
527 bool sample_id_all __maybe_unused)
528 {
529 struct perf_event_header *hdr = &event->header;
530 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr));
531 }
532
533 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all)
534 {
535 event->comm.pid = bswap_32(event->comm.pid);
536 event->comm.tid = bswap_32(event->comm.tid);
537
538 if (sample_id_all) {
539 void *data = &event->comm.comm;
540
541 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
542 swap_sample_id_all(event, data);
543 }
544 }
545
546 static void perf_event__mmap_swap(union perf_event *event,
547 bool sample_id_all)
548 {
549 event->mmap.pid = bswap_32(event->mmap.pid);
550 event->mmap.tid = bswap_32(event->mmap.tid);
551 event->mmap.start = bswap_64(event->mmap.start);
552 event->mmap.len = bswap_64(event->mmap.len);
553 event->mmap.pgoff = bswap_64(event->mmap.pgoff);
554
555 if (sample_id_all) {
556 void *data = &event->mmap.filename;
557
558 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
559 swap_sample_id_all(event, data);
560 }
561 }
562
563 static void perf_event__task_swap(union perf_event *event, bool sample_id_all)
564 {
565 event->fork.pid = bswap_32(event->fork.pid);
566 event->fork.tid = bswap_32(event->fork.tid);
567 event->fork.ppid = bswap_32(event->fork.ppid);
568 event->fork.ptid = bswap_32(event->fork.ptid);
569 event->fork.time = bswap_64(event->fork.time);
570
571 if (sample_id_all)
572 swap_sample_id_all(event, &event->fork + 1);
573 }
574
575 static void perf_event__read_swap(union perf_event *event, bool sample_id_all)
576 {
577 event->read.pid = bswap_32(event->read.pid);
578 event->read.tid = bswap_32(event->read.tid);
579 event->read.value = bswap_64(event->read.value);
580 event->read.time_enabled = bswap_64(event->read.time_enabled);
581 event->read.time_running = bswap_64(event->read.time_running);
582 event->read.id = bswap_64(event->read.id);
583
584 if (sample_id_all)
585 swap_sample_id_all(event, &event->read + 1);
586 }
587
588 static u8 revbyte(u8 b)
589 {
590 int rev = (b >> 4) | ((b & 0xf) << 4);
591 rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2);
592 rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1);
593 return (u8) rev;
594 }
595
596 /*
597 * XXX this is hack in attempt to carry flags bitfield
598 * throught endian village. ABI says:
599 *
600 * Bit-fields are allocated from right to left (least to most significant)
601 * on little-endian implementations and from left to right (most to least
602 * significant) on big-endian implementations.
603 *
604 * The above seems to be byte specific, so we need to reverse each
605 * byte of the bitfield. 'Internet' also says this might be implementation
606 * specific and we probably need proper fix and carry perf_event_attr
607 * bitfield flags in separate data file FEAT_ section. Thought this seems
608 * to work for now.
609 */
610 static void swap_bitfield(u8 *p, unsigned len)
611 {
612 unsigned i;
613
614 for (i = 0; i < len; i++) {
615 *p = revbyte(*p);
616 p++;
617 }
618 }
619
620 /* exported for swapping attributes in file header */
621 void perf_event__attr_swap(struct perf_event_attr *attr)
622 {
623 attr->type = bswap_32(attr->type);
624 attr->size = bswap_32(attr->size);
625 attr->config = bswap_64(attr->config);
626 attr->sample_period = bswap_64(attr->sample_period);
627 attr->sample_type = bswap_64(attr->sample_type);
628 attr->read_format = bswap_64(attr->read_format);
629 attr->wakeup_events = bswap_32(attr->wakeup_events);
630 attr->bp_type = bswap_32(attr->bp_type);
631 attr->bp_addr = bswap_64(attr->bp_addr);
632 attr->bp_len = bswap_64(attr->bp_len);
633
634 swap_bitfield((u8 *) (&attr->read_format + 1), sizeof(u64));
635 }
636
637 static void perf_event__hdr_attr_swap(union perf_event *event,
638 bool sample_id_all __maybe_unused)
639 {
640 size_t size;
641
642 perf_event__attr_swap(&event->attr.attr);
643
644 size = event->header.size;
645 size -= (void *)&event->attr.id - (void *)event;
646 mem_bswap_64(event->attr.id, size);
647 }
648
649 static void perf_event__event_type_swap(union perf_event *event,
650 bool sample_id_all __maybe_unused)
651 {
652 event->event_type.event_type.event_id =
653 bswap_64(event->event_type.event_type.event_id);
654 }
655
656 static void perf_event__tracing_data_swap(union perf_event *event,
657 bool sample_id_all __maybe_unused)
658 {
659 event->tracing_data.size = bswap_32(event->tracing_data.size);
660 }
661
662 typedef void (*perf_event__swap_op)(union perf_event *event,
663 bool sample_id_all);
664
665 static perf_event__swap_op perf_event__swap_ops[] = {
666 [PERF_RECORD_MMAP] = perf_event__mmap_swap,
667 [PERF_RECORD_COMM] = perf_event__comm_swap,
668 [PERF_RECORD_FORK] = perf_event__task_swap,
669 [PERF_RECORD_EXIT] = perf_event__task_swap,
670 [PERF_RECORD_LOST] = perf_event__all64_swap,
671 [PERF_RECORD_READ] = perf_event__read_swap,
672 [PERF_RECORD_SAMPLE] = perf_event__all64_swap,
673 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap,
674 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap,
675 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
676 [PERF_RECORD_HEADER_BUILD_ID] = NULL,
677 [PERF_RECORD_HEADER_MAX] = NULL,
678 };
679
680 struct sample_queue {
681 u64 timestamp;
682 u64 file_offset;
683 union perf_event *event;
684 struct list_head list;
685 };
686
687 static void perf_session_free_sample_buffers(struct perf_session *session)
688 {
689 struct ordered_samples *os = &session->ordered_samples;
690
691 while (!list_empty(&os->to_free)) {
692 struct sample_queue *sq;
693
694 sq = list_entry(os->to_free.next, struct sample_queue, list);
695 list_del(&sq->list);
696 free(sq);
697 }
698 }
699
700 static int perf_session_deliver_event(struct perf_session *session,
701 union perf_event *event,
702 struct perf_sample *sample,
703 struct perf_tool *tool,
704 u64 file_offset);
705
706 static int flush_sample_queue(struct perf_session *s,
707 struct perf_tool *tool)
708 {
709 struct ordered_samples *os = &s->ordered_samples;
710 struct list_head *head = &os->samples;
711 struct sample_queue *tmp, *iter;
712 struct perf_sample sample;
713 u64 limit = os->next_flush;
714 u64 last_ts = os->last_sample ? os->last_sample->timestamp : 0ULL;
715 unsigned idx = 0, progress_next = os->nr_samples / 16;
716 int ret;
717
718 if (!tool->ordered_samples || !limit)
719 return 0;
720
721 list_for_each_entry_safe(iter, tmp, head, list) {
722 if (iter->timestamp > limit)
723 break;
724
725 ret = perf_evlist__parse_sample(s->evlist, iter->event, &sample);
726 if (ret)
727 pr_err("Can't parse sample, err = %d\n", ret);
728 else {
729 ret = perf_session_deliver_event(s, iter->event, &sample, tool,
730 iter->file_offset);
731 if (ret)
732 return ret;
733 }
734
735 os->last_flush = iter->timestamp;
736 list_del(&iter->list);
737 list_add(&iter->list, &os->sample_cache);
738 if (++idx >= progress_next) {
739 progress_next += os->nr_samples / 16;
740 ui_progress__update(idx, os->nr_samples,
741 "Processing time ordered events...");
742 }
743 }
744
745 if (list_empty(head)) {
746 os->last_sample = NULL;
747 } else if (last_ts <= limit) {
748 os->last_sample =
749 list_entry(head->prev, struct sample_queue, list);
750 }
751
752 os->nr_samples = 0;
753
754 return 0;
755 }
756
757 /*
758 * When perf record finishes a pass on every buffers, it records this pseudo
759 * event.
760 * We record the max timestamp t found in the pass n.
761 * Assuming these timestamps are monotonic across cpus, we know that if
762 * a buffer still has events with timestamps below t, they will be all
763 * available and then read in the pass n + 1.
764 * Hence when we start to read the pass n + 2, we can safely flush every
765 * events with timestamps below t.
766 *
767 * ============ PASS n =================
768 * CPU 0 | CPU 1
769 * |
770 * cnt1 timestamps | cnt2 timestamps
771 * 1 | 2
772 * 2 | 3
773 * - | 4 <--- max recorded
774 *
775 * ============ PASS n + 1 ==============
776 * CPU 0 | CPU 1
777 * |
778 * cnt1 timestamps | cnt2 timestamps
779 * 3 | 5
780 * 4 | 6
781 * 5 | 7 <---- max recorded
782 *
783 * Flush every events below timestamp 4
784 *
785 * ============ PASS n + 2 ==============
786 * CPU 0 | CPU 1
787 * |
788 * cnt1 timestamps | cnt2 timestamps
789 * 6 | 8
790 * 7 | 9
791 * - | 10
792 *
793 * Flush every events below timestamp 7
794 * etc...
795 */
796 static int process_finished_round(struct perf_tool *tool,
797 union perf_event *event __maybe_unused,
798 struct perf_session *session)
799 {
800 int ret = flush_sample_queue(session, tool);
801 if (!ret)
802 session->ordered_samples.next_flush = session->ordered_samples.max_timestamp;
803
804 return ret;
805 }
806
807 /* The queue is ordered by time */
808 static void __queue_event(struct sample_queue *new, struct perf_session *s)
809 {
810 struct ordered_samples *os = &s->ordered_samples;
811 struct sample_queue *sample = os->last_sample;
812 u64 timestamp = new->timestamp;
813 struct list_head *p;
814
815 ++os->nr_samples;
816 os->last_sample = new;
817
818 if (!sample) {
819 list_add(&new->list, &os->samples);
820 os->max_timestamp = timestamp;
821 return;
822 }
823
824 /*
825 * last_sample might point to some random place in the list as it's
826 * the last queued event. We expect that the new event is close to
827 * this.
828 */
829 if (sample->timestamp <= timestamp) {
830 while (sample->timestamp <= timestamp) {
831 p = sample->list.next;
832 if (p == &os->samples) {
833 list_add_tail(&new->list, &os->samples);
834 os->max_timestamp = timestamp;
835 return;
836 }
837 sample = list_entry(p, struct sample_queue, list);
838 }
839 list_add_tail(&new->list, &sample->list);
840 } else {
841 while (sample->timestamp > timestamp) {
842 p = sample->list.prev;
843 if (p == &os->samples) {
844 list_add(&new->list, &os->samples);
845 return;
846 }
847 sample = list_entry(p, struct sample_queue, list);
848 }
849 list_add(&new->list, &sample->list);
850 }
851 }
852
853 #define MAX_SAMPLE_BUFFER (64 * 1024 / sizeof(struct sample_queue))
854
855 static int perf_session_queue_event(struct perf_session *s, union perf_event *event,
856 struct perf_sample *sample, u64 file_offset)
857 {
858 struct ordered_samples *os = &s->ordered_samples;
859 struct list_head *sc = &os->sample_cache;
860 u64 timestamp = sample->time;
861 struct sample_queue *new;
862
863 if (!timestamp || timestamp == ~0ULL)
864 return -ETIME;
865
866 if (timestamp < s->ordered_samples.last_flush) {
867 printf("Warning: Timestamp below last timeslice flush\n");
868 return -EINVAL;
869 }
870
871 if (!list_empty(sc)) {
872 new = list_entry(sc->next, struct sample_queue, list);
873 list_del(&new->list);
874 } else if (os->sample_buffer) {
875 new = os->sample_buffer + os->sample_buffer_idx;
876 if (++os->sample_buffer_idx == MAX_SAMPLE_BUFFER)
877 os->sample_buffer = NULL;
878 } else {
879 os->sample_buffer = malloc(MAX_SAMPLE_BUFFER * sizeof(*new));
880 if (!os->sample_buffer)
881 return -ENOMEM;
882 list_add(&os->sample_buffer->list, &os->to_free);
883 os->sample_buffer_idx = 2;
884 new = os->sample_buffer + 1;
885 }
886
887 new->timestamp = timestamp;
888 new->file_offset = file_offset;
889 new->event = event;
890
891 __queue_event(new, s);
892
893 return 0;
894 }
895
896 static void callchain__printf(struct perf_sample *sample)
897 {
898 unsigned int i;
899
900 printf("... chain: nr:%" PRIu64 "\n", sample->callchain->nr);
901
902 for (i = 0; i < sample->callchain->nr; i++)
903 printf("..... %2d: %016" PRIx64 "\n",
904 i, sample->callchain->ips[i]);
905 }
906
907 static void branch_stack__printf(struct perf_sample *sample)
908 {
909 uint64_t i;
910
911 printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr);
912
913 for (i = 0; i < sample->branch_stack->nr; i++)
914 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 "\n",
915 i, sample->branch_stack->entries[i].from,
916 sample->branch_stack->entries[i].to);
917 }
918
919 static void regs_dump__printf(u64 mask, u64 *regs)
920 {
921 unsigned rid, i = 0;
922
923 for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) {
924 u64 val = regs[i++];
925
926 printf(".... %-5s 0x%" PRIx64 "\n",
927 perf_reg_name(rid), val);
928 }
929 }
930
931 static void regs_user__printf(struct perf_sample *sample, u64 mask)
932 {
933 struct regs_dump *user_regs = &sample->user_regs;
934
935 if (user_regs->regs) {
936 printf("... user regs: mask 0x%" PRIx64 "\n", mask);
937 regs_dump__printf(mask, user_regs->regs);
938 }
939 }
940
941 static void stack_user__printf(struct stack_dump *dump)
942 {
943 printf("... ustack: size %" PRIu64 ", offset 0x%x\n",
944 dump->size, dump->offset);
945 }
946
947 static void perf_session__print_tstamp(struct perf_session *session,
948 union perf_event *event,
949 struct perf_sample *sample)
950 {
951 u64 sample_type = perf_evlist__sample_type(session->evlist);
952
953 if (event->header.type != PERF_RECORD_SAMPLE &&
954 !perf_evlist__sample_id_all(session->evlist)) {
955 fputs("-1 -1 ", stdout);
956 return;
957 }
958
959 if ((sample_type & PERF_SAMPLE_CPU))
960 printf("%u ", sample->cpu);
961
962 if (sample_type & PERF_SAMPLE_TIME)
963 printf("%" PRIu64 " ", sample->time);
964 }
965
966 static void dump_event(struct perf_session *session, union perf_event *event,
967 u64 file_offset, struct perf_sample *sample)
968 {
969 if (!dump_trace)
970 return;
971
972 printf("\n%#" PRIx64 " [%#x]: event: %d\n",
973 file_offset, event->header.size, event->header.type);
974
975 trace_event(event);
976
977 if (sample)
978 perf_session__print_tstamp(session, event, sample);
979
980 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
981 event->header.size, perf_event__name(event->header.type));
982 }
983
984 static void dump_sample(struct perf_evsel *evsel, union perf_event *event,
985 struct perf_sample *sample)
986 {
987 u64 sample_type;
988
989 if (!dump_trace)
990 return;
991
992 printf("(IP, %d): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n",
993 event->header.misc, sample->pid, sample->tid, sample->ip,
994 sample->period, sample->addr);
995
996 sample_type = evsel->attr.sample_type;
997
998 if (sample_type & PERF_SAMPLE_CALLCHAIN)
999 callchain__printf(sample);
1000
1001 if (sample_type & PERF_SAMPLE_BRANCH_STACK)
1002 branch_stack__printf(sample);
1003
1004 if (sample_type & PERF_SAMPLE_REGS_USER)
1005 regs_user__printf(sample, evsel->attr.sample_regs_user);
1006
1007 if (sample_type & PERF_SAMPLE_STACK_USER)
1008 stack_user__printf(&sample->user_stack);
1009 }
1010
1011 static struct machine *
1012 perf_session__find_machine_for_cpumode(struct perf_session *session,
1013 union perf_event *event)
1014 {
1015 const u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
1016
1017 if (perf_guest &&
1018 ((cpumode == PERF_RECORD_MISC_GUEST_KERNEL) ||
1019 (cpumode == PERF_RECORD_MISC_GUEST_USER))) {
1020 u32 pid;
1021
1022 if (event->header.type == PERF_RECORD_MMAP)
1023 pid = event->mmap.pid;
1024 else
1025 pid = event->ip.pid;
1026
1027 return perf_session__findnew_machine(session, pid);
1028 }
1029
1030 return perf_session__find_host_machine(session);
1031 }
1032
1033 static int perf_session_deliver_event(struct perf_session *session,
1034 union perf_event *event,
1035 struct perf_sample *sample,
1036 struct perf_tool *tool,
1037 u64 file_offset)
1038 {
1039 struct perf_evsel *evsel;
1040 struct machine *machine;
1041
1042 dump_event(session, event, file_offset, sample);
1043
1044 evsel = perf_evlist__id2evsel(session->evlist, sample->id);
1045 if (evsel != NULL && event->header.type != PERF_RECORD_SAMPLE) {
1046 /*
1047 * XXX We're leaving PERF_RECORD_SAMPLE unnacounted here
1048 * because the tools right now may apply filters, discarding
1049 * some of the samples. For consistency, in the future we
1050 * should have something like nr_filtered_samples and remove
1051 * the sample->period from total_sample_period, etc, KISS for
1052 * now tho.
1053 *
1054 * Also testing against NULL allows us to handle files without
1055 * attr.sample_id_all and/or without PERF_SAMPLE_ID. In the
1056 * future probably it'll be a good idea to restrict event
1057 * processing via perf_session to files with both set.
1058 */
1059 hists__inc_nr_events(&evsel->hists, event->header.type);
1060 }
1061
1062 machine = perf_session__find_machine_for_cpumode(session, event);
1063
1064 switch (event->header.type) {
1065 case PERF_RECORD_SAMPLE:
1066 dump_sample(evsel, event, sample);
1067 if (evsel == NULL) {
1068 ++session->hists.stats.nr_unknown_id;
1069 return 0;
1070 }
1071 if (machine == NULL) {
1072 ++session->hists.stats.nr_unprocessable_samples;
1073 return 0;
1074 }
1075 return tool->sample(tool, event, sample, evsel, machine);
1076 case PERF_RECORD_MMAP:
1077 return tool->mmap(tool, event, sample, machine);
1078 case PERF_RECORD_COMM:
1079 return tool->comm(tool, event, sample, machine);
1080 case PERF_RECORD_FORK:
1081 return tool->fork(tool, event, sample, machine);
1082 case PERF_RECORD_EXIT:
1083 return tool->exit(tool, event, sample, machine);
1084 case PERF_RECORD_LOST:
1085 if (tool->lost == perf_event__process_lost)
1086 session->hists.stats.total_lost += event->lost.lost;
1087 return tool->lost(tool, event, sample, machine);
1088 case PERF_RECORD_READ:
1089 return tool->read(tool, event, sample, evsel, machine);
1090 case PERF_RECORD_THROTTLE:
1091 return tool->throttle(tool, event, sample, machine);
1092 case PERF_RECORD_UNTHROTTLE:
1093 return tool->unthrottle(tool, event, sample, machine);
1094 default:
1095 ++session->hists.stats.nr_unknown_events;
1096 return -1;
1097 }
1098 }
1099
1100 static int perf_session__preprocess_sample(struct perf_session *session,
1101 union perf_event *event, struct perf_sample *sample)
1102 {
1103 if (event->header.type != PERF_RECORD_SAMPLE ||
1104 !(perf_evlist__sample_type(session->evlist) & PERF_SAMPLE_CALLCHAIN))
1105 return 0;
1106
1107 if (!ip_callchain__valid(sample->callchain, event)) {
1108 pr_debug("call-chain problem with event, skipping it.\n");
1109 ++session->hists.stats.nr_invalid_chains;
1110 session->hists.stats.total_invalid_chains += sample->period;
1111 return -EINVAL;
1112 }
1113 return 0;
1114 }
1115
1116 static int perf_session__process_user_event(struct perf_session *session, union perf_event *event,
1117 struct perf_tool *tool, u64 file_offset)
1118 {
1119 int err;
1120
1121 dump_event(session, event, file_offset, NULL);
1122
1123 /* These events are processed right away */
1124 switch (event->header.type) {
1125 case PERF_RECORD_HEADER_ATTR:
1126 err = tool->attr(event, &session->evlist);
1127 if (err == 0)
1128 perf_session__set_id_hdr_size(session);
1129 return err;
1130 case PERF_RECORD_HEADER_EVENT_TYPE:
1131 return tool->event_type(tool, event);
1132 case PERF_RECORD_HEADER_TRACING_DATA:
1133 /* setup for reading amidst mmap */
1134 lseek(session->fd, file_offset, SEEK_SET);
1135 return tool->tracing_data(event, session);
1136 case PERF_RECORD_HEADER_BUILD_ID:
1137 return tool->build_id(tool, event, session);
1138 case PERF_RECORD_FINISHED_ROUND:
1139 return tool->finished_round(tool, event, session);
1140 default:
1141 return -EINVAL;
1142 }
1143 }
1144
1145 static void event_swap(union perf_event *event, bool sample_id_all)
1146 {
1147 perf_event__swap_op swap;
1148
1149 swap = perf_event__swap_ops[event->header.type];
1150 if (swap)
1151 swap(event, sample_id_all);
1152 }
1153
1154 static int perf_session__process_event(struct perf_session *session,
1155 union perf_event *event,
1156 struct perf_tool *tool,
1157 u64 file_offset)
1158 {
1159 struct perf_sample sample;
1160 int ret;
1161
1162 if (session->header.needs_swap)
1163 event_swap(event, perf_evlist__sample_id_all(session->evlist));
1164
1165 if (event->header.type >= PERF_RECORD_HEADER_MAX)
1166 return -EINVAL;
1167
1168 hists__inc_nr_events(&session->hists, event->header.type);
1169
1170 if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1171 return perf_session__process_user_event(session, event, tool, file_offset);
1172
1173 /*
1174 * For all kernel events we get the sample data
1175 */
1176 ret = perf_evlist__parse_sample(session->evlist, event, &sample);
1177 if (ret)
1178 return ret;
1179
1180 /* Preprocess sample records - precheck callchains */
1181 if (perf_session__preprocess_sample(session, event, &sample))
1182 return 0;
1183
1184 if (tool->ordered_samples) {
1185 ret = perf_session_queue_event(session, event, &sample,
1186 file_offset);
1187 if (ret != -ETIME)
1188 return ret;
1189 }
1190
1191 return perf_session_deliver_event(session, event, &sample, tool,
1192 file_offset);
1193 }
1194
1195 void perf_event_header__bswap(struct perf_event_header *self)
1196 {
1197 self->type = bswap_32(self->type);
1198 self->misc = bswap_16(self->misc);
1199 self->size = bswap_16(self->size);
1200 }
1201
1202 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid)
1203 {
1204 return machine__findnew_thread(&session->host_machine, pid);
1205 }
1206
1207 static struct thread *perf_session__register_idle_thread(struct perf_session *self)
1208 {
1209 struct thread *thread = perf_session__findnew(self, 0);
1210
1211 if (thread == NULL || thread__set_comm(thread, "swapper")) {
1212 pr_err("problem inserting idle task.\n");
1213 thread = NULL;
1214 }
1215
1216 return thread;
1217 }
1218
1219 static void perf_session__warn_about_errors(const struct perf_session *session,
1220 const struct perf_tool *tool)
1221 {
1222 if (tool->lost == perf_event__process_lost &&
1223 session->hists.stats.nr_events[PERF_RECORD_LOST] != 0) {
1224 ui__warning("Processed %d events and lost %d chunks!\n\n"
1225 "Check IO/CPU overload!\n\n",
1226 session->hists.stats.nr_events[0],
1227 session->hists.stats.nr_events[PERF_RECORD_LOST]);
1228 }
1229
1230 if (session->hists.stats.nr_unknown_events != 0) {
1231 ui__warning("Found %u unknown events!\n\n"
1232 "Is this an older tool processing a perf.data "
1233 "file generated by a more recent tool?\n\n"
1234 "If that is not the case, consider "
1235 "reporting to linux-kernel@vger.kernel.org.\n\n",
1236 session->hists.stats.nr_unknown_events);
1237 }
1238
1239 if (session->hists.stats.nr_unknown_id != 0) {
1240 ui__warning("%u samples with id not present in the header\n",
1241 session->hists.stats.nr_unknown_id);
1242 }
1243
1244 if (session->hists.stats.nr_invalid_chains != 0) {
1245 ui__warning("Found invalid callchains!\n\n"
1246 "%u out of %u events were discarded for this reason.\n\n"
1247 "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1248 session->hists.stats.nr_invalid_chains,
1249 session->hists.stats.nr_events[PERF_RECORD_SAMPLE]);
1250 }
1251
1252 if (session->hists.stats.nr_unprocessable_samples != 0) {
1253 ui__warning("%u unprocessable samples recorded.\n"
1254 "Do you have a KVM guest running and not using 'perf kvm'?\n",
1255 session->hists.stats.nr_unprocessable_samples);
1256 }
1257 }
1258
1259 #define session_done() (*(volatile int *)(&session_done))
1260 volatile int session_done;
1261
1262 static int __perf_session__process_pipe_events(struct perf_session *self,
1263 struct perf_tool *tool)
1264 {
1265 union perf_event *event;
1266 uint32_t size, cur_size = 0;
1267 void *buf = NULL;
1268 int skip = 0;
1269 u64 head;
1270 int err;
1271 void *p;
1272
1273 perf_tool__fill_defaults(tool);
1274
1275 head = 0;
1276 cur_size = sizeof(union perf_event);
1277
1278 buf = malloc(cur_size);
1279 if (!buf)
1280 return -errno;
1281 more:
1282 event = buf;
1283 err = readn(self->fd, event, sizeof(struct perf_event_header));
1284 if (err <= 0) {
1285 if (err == 0)
1286 goto done;
1287
1288 pr_err("failed to read event header\n");
1289 goto out_err;
1290 }
1291
1292 if (self->header.needs_swap)
1293 perf_event_header__bswap(&event->header);
1294
1295 size = event->header.size;
1296 if (size == 0)
1297 size = 8;
1298
1299 if (size > cur_size) {
1300 void *new = realloc(buf, size);
1301 if (!new) {
1302 pr_err("failed to allocate memory to read event\n");
1303 goto out_err;
1304 }
1305 buf = new;
1306 cur_size = size;
1307 event = buf;
1308 }
1309 p = event;
1310 p += sizeof(struct perf_event_header);
1311
1312 if (size - sizeof(struct perf_event_header)) {
1313 err = readn(self->fd, p, size - sizeof(struct perf_event_header));
1314 if (err <= 0) {
1315 if (err == 0) {
1316 pr_err("unexpected end of event stream\n");
1317 goto done;
1318 }
1319
1320 pr_err("failed to read event data\n");
1321 goto out_err;
1322 }
1323 }
1324
1325 if ((skip = perf_session__process_event(self, event, tool, head)) < 0) {
1326 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1327 head, event->header.size, event->header.type);
1328 err = -EINVAL;
1329 goto out_err;
1330 }
1331
1332 head += size;
1333
1334 if (skip > 0)
1335 head += skip;
1336
1337 if (!session_done())
1338 goto more;
1339 done:
1340 err = 0;
1341 out_err:
1342 free(buf);
1343 perf_session__warn_about_errors(self, tool);
1344 perf_session_free_sample_buffers(self);
1345 return err;
1346 }
1347
1348 static union perf_event *
1349 fetch_mmaped_event(struct perf_session *session,
1350 u64 head, size_t mmap_size, char *buf)
1351 {
1352 union perf_event *event;
1353
1354 /*
1355 * Ensure we have enough space remaining to read
1356 * the size of the event in the headers.
1357 */
1358 if (head + sizeof(event->header) > mmap_size)
1359 return NULL;
1360
1361 event = (union perf_event *)(buf + head);
1362
1363 if (session->header.needs_swap)
1364 perf_event_header__bswap(&event->header);
1365
1366 if (head + event->header.size > mmap_size)
1367 return NULL;
1368
1369 return event;
1370 }
1371
1372 int __perf_session__process_events(struct perf_session *session,
1373 u64 data_offset, u64 data_size,
1374 u64 file_size, struct perf_tool *tool)
1375 {
1376 u64 head, page_offset, file_offset, file_pos, progress_next;
1377 int err, mmap_prot, mmap_flags, map_idx = 0;
1378 size_t mmap_size;
1379 char *buf, *mmaps[8];
1380 union perf_event *event;
1381 uint32_t size;
1382
1383 perf_tool__fill_defaults(tool);
1384
1385 page_offset = page_size * (data_offset / page_size);
1386 file_offset = page_offset;
1387 head = data_offset - page_offset;
1388
1389 if (data_offset + data_size < file_size)
1390 file_size = data_offset + data_size;
1391
1392 progress_next = file_size / 16;
1393
1394 mmap_size = session->mmap_window;
1395 if (mmap_size > file_size)
1396 mmap_size = file_size;
1397
1398 memset(mmaps, 0, sizeof(mmaps));
1399
1400 mmap_prot = PROT_READ;
1401 mmap_flags = MAP_SHARED;
1402
1403 if (session->header.needs_swap) {
1404 mmap_prot |= PROT_WRITE;
1405 mmap_flags = MAP_PRIVATE;
1406 }
1407 remap:
1408 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, session->fd,
1409 file_offset);
1410 if (buf == MAP_FAILED) {
1411 pr_err("failed to mmap file\n");
1412 err = -errno;
1413 goto out_err;
1414 }
1415 mmaps[map_idx] = buf;
1416 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
1417 file_pos = file_offset + head;
1418
1419 more:
1420 event = fetch_mmaped_event(session, head, mmap_size, buf);
1421 if (!event) {
1422 if (mmaps[map_idx]) {
1423 munmap(mmaps[map_idx], mmap_size);
1424 mmaps[map_idx] = NULL;
1425 }
1426
1427 page_offset = page_size * (head / page_size);
1428 file_offset += page_offset;
1429 head -= page_offset;
1430 goto remap;
1431 }
1432
1433 size = event->header.size;
1434
1435 if (size == 0 ||
1436 perf_session__process_event(session, event, tool, file_pos) < 0) {
1437 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1438 file_offset + head, event->header.size,
1439 event->header.type);
1440 err = -EINVAL;
1441 goto out_err;
1442 }
1443
1444 head += size;
1445 file_pos += size;
1446
1447 if (file_pos >= progress_next) {
1448 progress_next += file_size / 16;
1449 ui_progress__update(file_pos, file_size,
1450 "Processing events...");
1451 }
1452
1453 if (file_pos < file_size)
1454 goto more;
1455
1456 err = 0;
1457 /* do the final flush for ordered samples */
1458 session->ordered_samples.next_flush = ULLONG_MAX;
1459 err = flush_sample_queue(session, tool);
1460 out_err:
1461 ui_progress__finish();
1462 perf_session__warn_about_errors(session, tool);
1463 perf_session_free_sample_buffers(session);
1464 return err;
1465 }
1466
1467 int perf_session__process_events(struct perf_session *self,
1468 struct perf_tool *tool)
1469 {
1470 int err;
1471
1472 if (perf_session__register_idle_thread(self) == NULL)
1473 return -ENOMEM;
1474
1475 if (!self->fd_pipe)
1476 err = __perf_session__process_events(self,
1477 self->header.data_offset,
1478 self->header.data_size,
1479 self->size, tool);
1480 else
1481 err = __perf_session__process_pipe_events(self, tool);
1482
1483 return err;
1484 }
1485
1486 bool perf_session__has_traces(struct perf_session *session, const char *msg)
1487 {
1488 if (!(perf_evlist__sample_type(session->evlist) & PERF_SAMPLE_RAW)) {
1489 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
1490 return false;
1491 }
1492
1493 return true;
1494 }
1495
1496 int maps__set_kallsyms_ref_reloc_sym(struct map **maps,
1497 const char *symbol_name, u64 addr)
1498 {
1499 char *bracket;
1500 enum map_type i;
1501 struct ref_reloc_sym *ref;
1502
1503 ref = zalloc(sizeof(struct ref_reloc_sym));
1504 if (ref == NULL)
1505 return -ENOMEM;
1506
1507 ref->name = strdup(symbol_name);
1508 if (ref->name == NULL) {
1509 free(ref);
1510 return -ENOMEM;
1511 }
1512
1513 bracket = strchr(ref->name, ']');
1514 if (bracket)
1515 *bracket = '\0';
1516
1517 ref->addr = addr;
1518
1519 for (i = 0; i < MAP__NR_TYPES; ++i) {
1520 struct kmap *kmap = map__kmap(maps[i]);
1521 kmap->ref_reloc_sym = ref;
1522 }
1523
1524 return 0;
1525 }
1526
1527 size_t perf_session__fprintf_dsos(struct perf_session *self, FILE *fp)
1528 {
1529 return __dsos__fprintf(&self->host_machine.kernel_dsos, fp) +
1530 __dsos__fprintf(&self->host_machine.user_dsos, fp) +
1531 machines__fprintf_dsos(&self->machines, fp);
1532 }
1533
1534 size_t perf_session__fprintf_dsos_buildid(struct perf_session *self, FILE *fp,
1535 bool with_hits)
1536 {
1537 size_t ret = machine__fprintf_dsos_buildid(&self->host_machine, fp, with_hits);
1538 return ret + machines__fprintf_dsos_buildid(&self->machines, fp, with_hits);
1539 }
1540
1541 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
1542 {
1543 struct perf_evsel *pos;
1544 size_t ret = fprintf(fp, "Aggregated stats:\n");
1545
1546 ret += hists__fprintf_nr_events(&session->hists, fp);
1547
1548 list_for_each_entry(pos, &session->evlist->entries, node) {
1549 ret += fprintf(fp, "%s stats:\n", perf_evsel__name(pos));
1550 ret += hists__fprintf_nr_events(&pos->hists, fp);
1551 }
1552
1553 return ret;
1554 }
1555
1556 size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
1557 {
1558 /*
1559 * FIXME: Here we have to actually print all the machines in this
1560 * session, not just the host...
1561 */
1562 return machine__fprintf(&session->host_machine, fp);
1563 }
1564
1565 void perf_session__remove_thread(struct perf_session *session,
1566 struct thread *th)
1567 {
1568 /*
1569 * FIXME: This one makes no sense, we need to remove the thread from
1570 * the machine it belongs to, perf_session can have many machines, so
1571 * doing it always on ->host_machine is wrong. Fix when auditing all
1572 * the 'perf kvm' code.
1573 */
1574 machine__remove_thread(&session->host_machine, th);
1575 }
1576
1577 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
1578 unsigned int type)
1579 {
1580 struct perf_evsel *pos;
1581
1582 list_for_each_entry(pos, &session->evlist->entries, node) {
1583 if (pos->attr.type == type)
1584 return pos;
1585 }
1586 return NULL;
1587 }
1588
1589 void perf_evsel__print_ip(struct perf_evsel *evsel, union perf_event *event,
1590 struct perf_sample *sample, struct machine *machine,
1591 int print_sym, int print_dso, int print_symoffset)
1592 {
1593 struct addr_location al;
1594 struct callchain_cursor_node *node;
1595
1596 if (perf_event__preprocess_sample(event, machine, &al, sample,
1597 NULL) < 0) {
1598 error("problem processing %d event, skipping it.\n",
1599 event->header.type);
1600 return;
1601 }
1602
1603 if (symbol_conf.use_callchain && sample->callchain) {
1604
1605
1606 if (machine__resolve_callchain(machine, evsel, al.thread,
1607 sample, NULL) != 0) {
1608 if (verbose)
1609 error("Failed to resolve callchain. Skipping\n");
1610 return;
1611 }
1612 callchain_cursor_commit(&callchain_cursor);
1613
1614 while (1) {
1615 node = callchain_cursor_current(&callchain_cursor);
1616 if (!node)
1617 break;
1618
1619 printf("\t%16" PRIx64, node->ip);
1620 if (print_sym) {
1621 printf(" ");
1622 symbol__fprintf_symname(node->sym, stdout);
1623 }
1624 if (print_dso) {
1625 printf(" (");
1626 map__fprintf_dsoname(node->map, stdout);
1627 printf(")");
1628 }
1629 printf("\n");
1630
1631 callchain_cursor_advance(&callchain_cursor);
1632 }
1633
1634 } else {
1635 printf("%16" PRIx64, sample->ip);
1636 if (print_sym) {
1637 printf(" ");
1638 if (print_symoffset)
1639 symbol__fprintf_symname_offs(al.sym, &al,
1640 stdout);
1641 else
1642 symbol__fprintf_symname(al.sym, stdout);
1643 }
1644
1645 if (print_dso) {
1646 printf(" (");
1647 map__fprintf_dsoname(al.map, stdout);
1648 printf(")");
1649 }
1650 }
1651 }
1652
1653 int perf_session__cpu_bitmap(struct perf_session *session,
1654 const char *cpu_list, unsigned long *cpu_bitmap)
1655 {
1656 int i;
1657 struct cpu_map *map;
1658
1659 for (i = 0; i < PERF_TYPE_MAX; ++i) {
1660 struct perf_evsel *evsel;
1661
1662 evsel = perf_session__find_first_evtype(session, i);
1663 if (!evsel)
1664 continue;
1665
1666 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) {
1667 pr_err("File does not contain CPU events. "
1668 "Remove -c option to proceed.\n");
1669 return -1;
1670 }
1671 }
1672
1673 map = cpu_map__new(cpu_list);
1674 if (map == NULL) {
1675 pr_err("Invalid cpu_list\n");
1676 return -1;
1677 }
1678
1679 for (i = 0; i < map->nr; i++) {
1680 int cpu = map->map[i];
1681
1682 if (cpu >= MAX_NR_CPUS) {
1683 pr_err("Requested CPU %d too large. "
1684 "Consider raising MAX_NR_CPUS\n", cpu);
1685 return -1;
1686 }
1687
1688 set_bit(cpu, cpu_bitmap);
1689 }
1690
1691 return 0;
1692 }
1693
1694 void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
1695 bool full)
1696 {
1697 struct stat st;
1698 int ret;
1699
1700 if (session == NULL || fp == NULL)
1701 return;
1702
1703 ret = fstat(session->fd, &st);
1704 if (ret == -1)
1705 return;
1706
1707 fprintf(fp, "# ========\n");
1708 fprintf(fp, "# captured on: %s", ctime(&st.st_ctime));
1709 perf_header__fprintf_info(session, fp, full);
1710 fprintf(fp, "# ========\n#\n");
1711 }
1712
1713
1714 int __perf_session__set_tracepoints_handlers(struct perf_session *session,
1715 const struct perf_evsel_str_handler *assocs,
1716 size_t nr_assocs)
1717 {
1718 struct perf_evlist *evlist = session->evlist;
1719 struct event_format *format;
1720 struct perf_evsel *evsel;
1721 char *tracepoint, *name;
1722 size_t i;
1723 int err;
1724
1725 for (i = 0; i < nr_assocs; i++) {
1726 err = -ENOMEM;
1727 tracepoint = strdup(assocs[i].name);
1728 if (tracepoint == NULL)
1729 goto out;
1730
1731 err = -ENOENT;
1732 name = strchr(tracepoint, ':');
1733 if (name == NULL)
1734 goto out_free;
1735
1736 *name++ = '\0';
1737 format = pevent_find_event_by_name(session->pevent,
1738 tracepoint, name);
1739 if (format == NULL) {
1740 /*
1741 * Adding a handler for an event not in the session,
1742 * just ignore it.
1743 */
1744 goto next;
1745 }
1746
1747 evsel = perf_evlist__find_tracepoint_by_id(evlist, format->id);
1748 if (evsel == NULL)
1749 goto next;
1750
1751 err = -EEXIST;
1752 if (evsel->handler.func != NULL)
1753 goto out_free;
1754 evsel->handler.func = assocs[i].handler;
1755 next:
1756 free(tracepoint);
1757 }
1758
1759 err = 0;
1760 out:
1761 return err;
1762
1763 out_free:
1764 free(tracepoint);
1765 goto out;
1766 }
Linux kernel - Deliverables
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