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[mirror_ubuntu-zesty-kernel.git] / tools / perf / util / event.c
1 #include <linux/types.h>
2 #include <sys/mman.h>
3 #include "event.h"
4 #include "debug.h"
5 #include "hist.h"
6 #include "machine.h"
7 #include "sort.h"
8 #include "string.h"
9 #include "strlist.h"
10 #include "thread.h"
11 #include "thread_map.h"
12 #include "symbol/kallsyms.h"
13
14 static const char *perf_event__names[] = {
15 [0] = "TOTAL",
16 [PERF_RECORD_MMAP] = "MMAP",
17 [PERF_RECORD_MMAP2] = "MMAP2",
18 [PERF_RECORD_LOST] = "LOST",
19 [PERF_RECORD_COMM] = "COMM",
20 [PERF_RECORD_EXIT] = "EXIT",
21 [PERF_RECORD_THROTTLE] = "THROTTLE",
22 [PERF_RECORD_UNTHROTTLE] = "UNTHROTTLE",
23 [PERF_RECORD_FORK] = "FORK",
24 [PERF_RECORD_READ] = "READ",
25 [PERF_RECORD_SAMPLE] = "SAMPLE",
26 [PERF_RECORD_AUX] = "AUX",
27 [PERF_RECORD_ITRACE_START] = "ITRACE_START",
28 [PERF_RECORD_HEADER_ATTR] = "ATTR",
29 [PERF_RECORD_HEADER_EVENT_TYPE] = "EVENT_TYPE",
30 [PERF_RECORD_HEADER_TRACING_DATA] = "TRACING_DATA",
31 [PERF_RECORD_HEADER_BUILD_ID] = "BUILD_ID",
32 [PERF_RECORD_FINISHED_ROUND] = "FINISHED_ROUND",
33 [PERF_RECORD_ID_INDEX] = "ID_INDEX",
34 [PERF_RECORD_AUXTRACE_INFO] = "AUXTRACE_INFO",
35 [PERF_RECORD_AUXTRACE] = "AUXTRACE",
36 [PERF_RECORD_AUXTRACE_ERROR] = "AUXTRACE_ERROR",
37 };
38
39 const char *perf_event__name(unsigned int id)
40 {
41 if (id >= ARRAY_SIZE(perf_event__names))
42 return "INVALID";
43 if (!perf_event__names[id])
44 return "UNKNOWN";
45 return perf_event__names[id];
46 }
47
48 static struct perf_sample synth_sample = {
49 .pid = -1,
50 .tid = -1,
51 .time = -1,
52 .stream_id = -1,
53 .cpu = -1,
54 .period = 1,
55 };
56
57 /*
58 * Assumes that the first 4095 bytes of /proc/pid/stat contains
59 * the comm, tgid and ppid.
60 */
61 static int perf_event__get_comm_ids(pid_t pid, char *comm, size_t len,
62 pid_t *tgid, pid_t *ppid)
63 {
64 char filename[PATH_MAX];
65 char bf[4096];
66 int fd;
67 size_t size = 0, n;
68 char *nl, *name, *tgids, *ppids;
69
70 *tgid = -1;
71 *ppid = -1;
72
73 snprintf(filename, sizeof(filename), "/proc/%d/status", pid);
74
75 fd = open(filename, O_RDONLY);
76 if (fd < 0) {
77 pr_debug("couldn't open %s\n", filename);
78 return -1;
79 }
80
81 n = read(fd, bf, sizeof(bf) - 1);
82 close(fd);
83 if (n <= 0) {
84 pr_warning("Couldn't get COMM, tigd and ppid for pid %d\n",
85 pid);
86 return -1;
87 }
88 bf[n] = '\0';
89
90 name = strstr(bf, "Name:");
91 tgids = strstr(bf, "Tgid:");
92 ppids = strstr(bf, "PPid:");
93
94 if (name) {
95 name += 5; /* strlen("Name:") */
96
97 while (*name && isspace(*name))
98 ++name;
99
100 nl = strchr(name, '\n');
101 if (nl)
102 *nl = '\0';
103
104 size = strlen(name);
105 if (size >= len)
106 size = len - 1;
107 memcpy(comm, name, size);
108 comm[size] = '\0';
109 } else {
110 pr_debug("Name: string not found for pid %d\n", pid);
111 }
112
113 if (tgids) {
114 tgids += 5; /* strlen("Tgid:") */
115 *tgid = atoi(tgids);
116 } else {
117 pr_debug("Tgid: string not found for pid %d\n", pid);
118 }
119
120 if (ppids) {
121 ppids += 5; /* strlen("PPid:") */
122 *ppid = atoi(ppids);
123 } else {
124 pr_debug("PPid: string not found for pid %d\n", pid);
125 }
126
127 return 0;
128 }
129
130 static int perf_event__prepare_comm(union perf_event *event, pid_t pid,
131 struct machine *machine,
132 pid_t *tgid, pid_t *ppid)
133 {
134 size_t size;
135
136 *ppid = -1;
137
138 memset(&event->comm, 0, sizeof(event->comm));
139
140 if (machine__is_host(machine)) {
141 if (perf_event__get_comm_ids(pid, event->comm.comm,
142 sizeof(event->comm.comm),
143 tgid, ppid) != 0) {
144 return -1;
145 }
146 } else {
147 *tgid = machine->pid;
148 }
149
150 if (*tgid < 0)
151 return -1;
152
153 event->comm.pid = *tgid;
154 event->comm.header.type = PERF_RECORD_COMM;
155
156 size = strlen(event->comm.comm) + 1;
157 size = PERF_ALIGN(size, sizeof(u64));
158 memset(event->comm.comm + size, 0, machine->id_hdr_size);
159 event->comm.header.size = (sizeof(event->comm) -
160 (sizeof(event->comm.comm) - size) +
161 machine->id_hdr_size);
162 event->comm.tid = pid;
163
164 return 0;
165 }
166
167 static pid_t perf_event__synthesize_comm(struct perf_tool *tool,
168 union perf_event *event, pid_t pid,
169 perf_event__handler_t process,
170 struct machine *machine)
171 {
172 pid_t tgid, ppid;
173
174 if (perf_event__prepare_comm(event, pid, machine, &tgid, &ppid) != 0)
175 return -1;
176
177 if (process(tool, event, &synth_sample, machine) != 0)
178 return -1;
179
180 return tgid;
181 }
182
183 static int perf_event__synthesize_fork(struct perf_tool *tool,
184 union perf_event *event,
185 pid_t pid, pid_t tgid, pid_t ppid,
186 perf_event__handler_t process,
187 struct machine *machine)
188 {
189 memset(&event->fork, 0, sizeof(event->fork) + machine->id_hdr_size);
190
191 /*
192 * for main thread set parent to ppid from status file. For other
193 * threads set parent pid to main thread. ie., assume main thread
194 * spawns all threads in a process
195 */
196 if (tgid == pid) {
197 event->fork.ppid = ppid;
198 event->fork.ptid = ppid;
199 } else {
200 event->fork.ppid = tgid;
201 event->fork.ptid = tgid;
202 }
203 event->fork.pid = tgid;
204 event->fork.tid = pid;
205 event->fork.header.type = PERF_RECORD_FORK;
206
207 event->fork.header.size = (sizeof(event->fork) + machine->id_hdr_size);
208
209 if (process(tool, event, &synth_sample, machine) != 0)
210 return -1;
211
212 return 0;
213 }
214
215 int perf_event__synthesize_mmap_events(struct perf_tool *tool,
216 union perf_event *event,
217 pid_t pid, pid_t tgid,
218 perf_event__handler_t process,
219 struct machine *machine,
220 bool mmap_data)
221 {
222 char filename[PATH_MAX];
223 FILE *fp;
224 int rc = 0;
225
226 if (machine__is_default_guest(machine))
227 return 0;
228
229 snprintf(filename, sizeof(filename), "%s/proc/%d/maps",
230 machine->root_dir, pid);
231
232 fp = fopen(filename, "r");
233 if (fp == NULL) {
234 /*
235 * We raced with a task exiting - just return:
236 */
237 pr_debug("couldn't open %s\n", filename);
238 return -1;
239 }
240
241 event->header.type = PERF_RECORD_MMAP2;
242
243 while (1) {
244 char bf[BUFSIZ];
245 char prot[5];
246 char execname[PATH_MAX];
247 char anonstr[] = "//anon";
248 unsigned int ino;
249 size_t size;
250 ssize_t n;
251
252 if (fgets(bf, sizeof(bf), fp) == NULL)
253 break;
254
255 /* ensure null termination since stack will be reused. */
256 strcpy(execname, "");
257
258 /* 00400000-0040c000 r-xp 00000000 fd:01 41038 /bin/cat */
259 n = sscanf(bf, "%"PRIx64"-%"PRIx64" %s %"PRIx64" %x:%x %u %s\n",
260 &event->mmap2.start, &event->mmap2.len, prot,
261 &event->mmap2.pgoff, &event->mmap2.maj,
262 &event->mmap2.min,
263 &ino, execname);
264
265 /*
266 * Anon maps don't have the execname.
267 */
268 if (n < 7)
269 continue;
270
271 event->mmap2.ino = (u64)ino;
272
273 /*
274 * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
275 */
276 if (machine__is_host(machine))
277 event->header.misc = PERF_RECORD_MISC_USER;
278 else
279 event->header.misc = PERF_RECORD_MISC_GUEST_USER;
280
281 /* map protection and flags bits */
282 event->mmap2.prot = 0;
283 event->mmap2.flags = 0;
284 if (prot[0] == 'r')
285 event->mmap2.prot |= PROT_READ;
286 if (prot[1] == 'w')
287 event->mmap2.prot |= PROT_WRITE;
288 if (prot[2] == 'x')
289 event->mmap2.prot |= PROT_EXEC;
290
291 if (prot[3] == 's')
292 event->mmap2.flags |= MAP_SHARED;
293 else
294 event->mmap2.flags |= MAP_PRIVATE;
295
296 if (prot[2] != 'x') {
297 if (!mmap_data || prot[0] != 'r')
298 continue;
299
300 event->header.misc |= PERF_RECORD_MISC_MMAP_DATA;
301 }
302
303 if (!strcmp(execname, ""))
304 strcpy(execname, anonstr);
305
306 size = strlen(execname) + 1;
307 memcpy(event->mmap2.filename, execname, size);
308 size = PERF_ALIGN(size, sizeof(u64));
309 event->mmap2.len -= event->mmap.start;
310 event->mmap2.header.size = (sizeof(event->mmap2) -
311 (sizeof(event->mmap2.filename) - size));
312 memset(event->mmap2.filename + size, 0, machine->id_hdr_size);
313 event->mmap2.header.size += machine->id_hdr_size;
314 event->mmap2.pid = tgid;
315 event->mmap2.tid = pid;
316
317 if (process(tool, event, &synth_sample, machine) != 0) {
318 rc = -1;
319 break;
320 }
321 }
322
323 fclose(fp);
324 return rc;
325 }
326
327 int perf_event__synthesize_modules(struct perf_tool *tool,
328 perf_event__handler_t process,
329 struct machine *machine)
330 {
331 int rc = 0;
332 struct map *pos;
333 struct map_groups *kmaps = &machine->kmaps;
334 struct rb_root *maps = &kmaps->maps[MAP__FUNCTION];
335 union perf_event *event = zalloc((sizeof(event->mmap) +
336 machine->id_hdr_size));
337 if (event == NULL) {
338 pr_debug("Not enough memory synthesizing mmap event "
339 "for kernel modules\n");
340 return -1;
341 }
342
343 event->header.type = PERF_RECORD_MMAP;
344
345 /*
346 * kernel uses 0 for user space maps, see kernel/perf_event.c
347 * __perf_event_mmap
348 */
349 if (machine__is_host(machine))
350 event->header.misc = PERF_RECORD_MISC_KERNEL;
351 else
352 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
353
354 for (pos = maps__first(maps); pos; pos = map__next(pos)) {
355 size_t size;
356
357 if (pos->dso->kernel)
358 continue;
359
360 size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
361 event->mmap.header.type = PERF_RECORD_MMAP;
362 event->mmap.header.size = (sizeof(event->mmap) -
363 (sizeof(event->mmap.filename) - size));
364 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
365 event->mmap.header.size += machine->id_hdr_size;
366 event->mmap.start = pos->start;
367 event->mmap.len = pos->end - pos->start;
368 event->mmap.pid = machine->pid;
369
370 memcpy(event->mmap.filename, pos->dso->long_name,
371 pos->dso->long_name_len + 1);
372 if (process(tool, event, &synth_sample, machine) != 0) {
373 rc = -1;
374 break;
375 }
376 }
377
378 free(event);
379 return rc;
380 }
381
382 static int __event__synthesize_thread(union perf_event *comm_event,
383 union perf_event *mmap_event,
384 union perf_event *fork_event,
385 pid_t pid, int full,
386 perf_event__handler_t process,
387 struct perf_tool *tool,
388 struct machine *machine, bool mmap_data)
389 {
390 char filename[PATH_MAX];
391 DIR *tasks;
392 struct dirent dirent, *next;
393 pid_t tgid, ppid;
394 int rc = 0;
395
396 /* special case: only send one comm event using passed in pid */
397 if (!full) {
398 tgid = perf_event__synthesize_comm(tool, comm_event, pid,
399 process, machine);
400
401 if (tgid == -1)
402 return -1;
403
404 return perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
405 process, machine, mmap_data);
406 }
407
408 if (machine__is_default_guest(machine))
409 return 0;
410
411 snprintf(filename, sizeof(filename), "%s/proc/%d/task",
412 machine->root_dir, pid);
413
414 tasks = opendir(filename);
415 if (tasks == NULL) {
416 pr_debug("couldn't open %s\n", filename);
417 return 0;
418 }
419
420 while (!readdir_r(tasks, &dirent, &next) && next) {
421 char *end;
422 pid_t _pid;
423
424 _pid = strtol(dirent.d_name, &end, 10);
425 if (*end)
426 continue;
427
428 rc = -1;
429 if (perf_event__prepare_comm(comm_event, _pid, machine,
430 &tgid, &ppid) != 0)
431 break;
432
433 if (perf_event__synthesize_fork(tool, fork_event, _pid, tgid,
434 ppid, process, machine) < 0)
435 break;
436 /*
437 * Send the prepared comm event
438 */
439 if (process(tool, comm_event, &synth_sample, machine) != 0)
440 break;
441
442 rc = 0;
443 if (_pid == pid) {
444 /* process the parent's maps too */
445 rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
446 process, machine, mmap_data);
447 if (rc)
448 break;
449 }
450 }
451
452 closedir(tasks);
453 return rc;
454 }
455
456 int perf_event__synthesize_thread_map(struct perf_tool *tool,
457 struct thread_map *threads,
458 perf_event__handler_t process,
459 struct machine *machine,
460 bool mmap_data)
461 {
462 union perf_event *comm_event, *mmap_event, *fork_event;
463 int err = -1, thread, j;
464
465 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
466 if (comm_event == NULL)
467 goto out;
468
469 mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size);
470 if (mmap_event == NULL)
471 goto out_free_comm;
472
473 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
474 if (fork_event == NULL)
475 goto out_free_mmap;
476
477 err = 0;
478 for (thread = 0; thread < threads->nr; ++thread) {
479 if (__event__synthesize_thread(comm_event, mmap_event,
480 fork_event,
481 threads->map[thread], 0,
482 process, tool, machine,
483 mmap_data)) {
484 err = -1;
485 break;
486 }
487
488 /*
489 * comm.pid is set to thread group id by
490 * perf_event__synthesize_comm
491 */
492 if ((int) comm_event->comm.pid != threads->map[thread]) {
493 bool need_leader = true;
494
495 /* is thread group leader in thread_map? */
496 for (j = 0; j < threads->nr; ++j) {
497 if ((int) comm_event->comm.pid == threads->map[j]) {
498 need_leader = false;
499 break;
500 }
501 }
502
503 /* if not, generate events for it */
504 if (need_leader &&
505 __event__synthesize_thread(comm_event, mmap_event,
506 fork_event,
507 comm_event->comm.pid, 0,
508 process, tool, machine,
509 mmap_data)) {
510 err = -1;
511 break;
512 }
513 }
514 }
515 free(fork_event);
516 out_free_mmap:
517 free(mmap_event);
518 out_free_comm:
519 free(comm_event);
520 out:
521 return err;
522 }
523
524 int perf_event__synthesize_threads(struct perf_tool *tool,
525 perf_event__handler_t process,
526 struct machine *machine, bool mmap_data)
527 {
528 DIR *proc;
529 char proc_path[PATH_MAX];
530 struct dirent dirent, *next;
531 union perf_event *comm_event, *mmap_event, *fork_event;
532 int err = -1;
533
534 if (machine__is_default_guest(machine))
535 return 0;
536
537 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
538 if (comm_event == NULL)
539 goto out;
540
541 mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size);
542 if (mmap_event == NULL)
543 goto out_free_comm;
544
545 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
546 if (fork_event == NULL)
547 goto out_free_mmap;
548
549 snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir);
550 proc = opendir(proc_path);
551
552 if (proc == NULL)
553 goto out_free_fork;
554
555 while (!readdir_r(proc, &dirent, &next) && next) {
556 char *end;
557 pid_t pid = strtol(dirent.d_name, &end, 10);
558
559 if (*end) /* only interested in proper numerical dirents */
560 continue;
561 /*
562 * We may race with exiting thread, so don't stop just because
563 * one thread couldn't be synthesized.
564 */
565 __event__synthesize_thread(comm_event, mmap_event, fork_event, pid,
566 1, process, tool, machine, mmap_data);
567 }
568
569 err = 0;
570 closedir(proc);
571 out_free_fork:
572 free(fork_event);
573 out_free_mmap:
574 free(mmap_event);
575 out_free_comm:
576 free(comm_event);
577 out:
578 return err;
579 }
580
581 struct process_symbol_args {
582 const char *name;
583 u64 start;
584 };
585
586 static int find_symbol_cb(void *arg, const char *name, char type,
587 u64 start)
588 {
589 struct process_symbol_args *args = arg;
590
591 /*
592 * Must be a function or at least an alias, as in PARISC64, where "_text" is
593 * an 'A' to the same address as "_stext".
594 */
595 if (!(symbol_type__is_a(type, MAP__FUNCTION) ||
596 type == 'A') || strcmp(name, args->name))
597 return 0;
598
599 args->start = start;
600 return 1;
601 }
602
603 u64 kallsyms__get_function_start(const char *kallsyms_filename,
604 const char *symbol_name)
605 {
606 struct process_symbol_args args = { .name = symbol_name, };
607
608 if (kallsyms__parse(kallsyms_filename, &args, find_symbol_cb) <= 0)
609 return 0;
610
611 return args.start;
612 }
613
614 int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
615 perf_event__handler_t process,
616 struct machine *machine)
617 {
618 size_t size;
619 const char *mmap_name;
620 char name_buff[PATH_MAX];
621 struct map *map;
622 struct kmap *kmap;
623 int err;
624 union perf_event *event;
625
626 if (machine->vmlinux_maps[0] == NULL)
627 return -1;
628
629 /*
630 * We should get this from /sys/kernel/sections/.text, but till that is
631 * available use this, and after it is use this as a fallback for older
632 * kernels.
633 */
634 event = zalloc((sizeof(event->mmap) + machine->id_hdr_size));
635 if (event == NULL) {
636 pr_debug("Not enough memory synthesizing mmap event "
637 "for kernel modules\n");
638 return -1;
639 }
640
641 mmap_name = machine__mmap_name(machine, name_buff, sizeof(name_buff));
642 if (machine__is_host(machine)) {
643 /*
644 * kernel uses PERF_RECORD_MISC_USER for user space maps,
645 * see kernel/perf_event.c __perf_event_mmap
646 */
647 event->header.misc = PERF_RECORD_MISC_KERNEL;
648 } else {
649 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
650 }
651
652 map = machine->vmlinux_maps[MAP__FUNCTION];
653 kmap = map__kmap(map);
654 size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
655 "%s%s", mmap_name, kmap->ref_reloc_sym->name) + 1;
656 size = PERF_ALIGN(size, sizeof(u64));
657 event->mmap.header.type = PERF_RECORD_MMAP;
658 event->mmap.header.size = (sizeof(event->mmap) -
659 (sizeof(event->mmap.filename) - size) + machine->id_hdr_size);
660 event->mmap.pgoff = kmap->ref_reloc_sym->addr;
661 event->mmap.start = map->start;
662 event->mmap.len = map->end - event->mmap.start;
663 event->mmap.pid = machine->pid;
664
665 err = process(tool, event, &synth_sample, machine);
666 free(event);
667
668 return err;
669 }
670
671 size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
672 {
673 const char *s;
674
675 if (event->header.misc & PERF_RECORD_MISC_COMM_EXEC)
676 s = " exec";
677 else
678 s = "";
679
680 return fprintf(fp, "%s: %s:%d/%d\n", s, event->comm.comm, event->comm.pid, event->comm.tid);
681 }
682
683 int perf_event__process_comm(struct perf_tool *tool __maybe_unused,
684 union perf_event *event,
685 struct perf_sample *sample,
686 struct machine *machine)
687 {
688 return machine__process_comm_event(machine, event, sample);
689 }
690
691 int perf_event__process_lost(struct perf_tool *tool __maybe_unused,
692 union perf_event *event,
693 struct perf_sample *sample,
694 struct machine *machine)
695 {
696 return machine__process_lost_event(machine, event, sample);
697 }
698
699 int perf_event__process_aux(struct perf_tool *tool __maybe_unused,
700 union perf_event *event,
701 struct perf_sample *sample __maybe_unused,
702 struct machine *machine)
703 {
704 return machine__process_aux_event(machine, event);
705 }
706
707 int perf_event__process_itrace_start(struct perf_tool *tool __maybe_unused,
708 union perf_event *event,
709 struct perf_sample *sample __maybe_unused,
710 struct machine *machine)
711 {
712 return machine__process_itrace_start_event(machine, event);
713 }
714
715 size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
716 {
717 return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %c %s\n",
718 event->mmap.pid, event->mmap.tid, event->mmap.start,
719 event->mmap.len, event->mmap.pgoff,
720 (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x',
721 event->mmap.filename);
722 }
723
724 size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp)
725 {
726 return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64
727 " %02x:%02x %"PRIu64" %"PRIu64"]: %c%c%c%c %s\n",
728 event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
729 event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj,
730 event->mmap2.min, event->mmap2.ino,
731 event->mmap2.ino_generation,
732 (event->mmap2.prot & PROT_READ) ? 'r' : '-',
733 (event->mmap2.prot & PROT_WRITE) ? 'w' : '-',
734 (event->mmap2.prot & PROT_EXEC) ? 'x' : '-',
735 (event->mmap2.flags & MAP_SHARED) ? 's' : 'p',
736 event->mmap2.filename);
737 }
738
739 int perf_event__process_mmap(struct perf_tool *tool __maybe_unused,
740 union perf_event *event,
741 struct perf_sample *sample,
742 struct machine *machine)
743 {
744 return machine__process_mmap_event(machine, event, sample);
745 }
746
747 int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused,
748 union perf_event *event,
749 struct perf_sample *sample,
750 struct machine *machine)
751 {
752 return machine__process_mmap2_event(machine, event, sample);
753 }
754
755 size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
756 {
757 return fprintf(fp, "(%d:%d):(%d:%d)\n",
758 event->fork.pid, event->fork.tid,
759 event->fork.ppid, event->fork.ptid);
760 }
761
762 int perf_event__process_fork(struct perf_tool *tool __maybe_unused,
763 union perf_event *event,
764 struct perf_sample *sample,
765 struct machine *machine)
766 {
767 return machine__process_fork_event(machine, event, sample);
768 }
769
770 int perf_event__process_exit(struct perf_tool *tool __maybe_unused,
771 union perf_event *event,
772 struct perf_sample *sample,
773 struct machine *machine)
774 {
775 return machine__process_exit_event(machine, event, sample);
776 }
777
778 size_t perf_event__fprintf_aux(union perf_event *event, FILE *fp)
779 {
780 return fprintf(fp, " offset: %#"PRIx64" size: %#"PRIx64" flags: %#"PRIx64" [%s%s]\n",
781 event->aux.aux_offset, event->aux.aux_size,
782 event->aux.flags,
783 event->aux.flags & PERF_AUX_FLAG_TRUNCATED ? "T" : "",
784 event->aux.flags & PERF_AUX_FLAG_OVERWRITE ? "O" : "");
785 }
786
787 size_t perf_event__fprintf_itrace_start(union perf_event *event, FILE *fp)
788 {
789 return fprintf(fp, " pid: %u tid: %u\n",
790 event->itrace_start.pid, event->itrace_start.tid);
791 }
792
793 size_t perf_event__fprintf(union perf_event *event, FILE *fp)
794 {
795 size_t ret = fprintf(fp, "PERF_RECORD_%s",
796 perf_event__name(event->header.type));
797
798 switch (event->header.type) {
799 case PERF_RECORD_COMM:
800 ret += perf_event__fprintf_comm(event, fp);
801 break;
802 case PERF_RECORD_FORK:
803 case PERF_RECORD_EXIT:
804 ret += perf_event__fprintf_task(event, fp);
805 break;
806 case PERF_RECORD_MMAP:
807 ret += perf_event__fprintf_mmap(event, fp);
808 break;
809 case PERF_RECORD_MMAP2:
810 ret += perf_event__fprintf_mmap2(event, fp);
811 break;
812 case PERF_RECORD_AUX:
813 ret += perf_event__fprintf_aux(event, fp);
814 break;
815 case PERF_RECORD_ITRACE_START:
816 ret += perf_event__fprintf_itrace_start(event, fp);
817 break;
818 default:
819 ret += fprintf(fp, "\n");
820 }
821
822 return ret;
823 }
824
825 int perf_event__process(struct perf_tool *tool __maybe_unused,
826 union perf_event *event,
827 struct perf_sample *sample,
828 struct machine *machine)
829 {
830 return machine__process_event(machine, event, sample);
831 }
832
833 void thread__find_addr_map(struct thread *thread, u8 cpumode,
834 enum map_type type, u64 addr,
835 struct addr_location *al)
836 {
837 struct map_groups *mg = thread->mg;
838 struct machine *machine = mg->machine;
839 bool load_map = false;
840
841 al->machine = machine;
842 al->thread = thread;
843 al->addr = addr;
844 al->cpumode = cpumode;
845 al->filtered = 0;
846
847 if (machine == NULL) {
848 al->map = NULL;
849 return;
850 }
851
852 if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
853 al->level = 'k';
854 mg = &machine->kmaps;
855 load_map = true;
856 } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
857 al->level = '.';
858 } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
859 al->level = 'g';
860 mg = &machine->kmaps;
861 load_map = true;
862 } else if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) {
863 al->level = 'u';
864 } else {
865 al->level = 'H';
866 al->map = NULL;
867
868 if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
869 cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
870 !perf_guest)
871 al->filtered |= (1 << HIST_FILTER__GUEST);
872 if ((cpumode == PERF_RECORD_MISC_USER ||
873 cpumode == PERF_RECORD_MISC_KERNEL) &&
874 !perf_host)
875 al->filtered |= (1 << HIST_FILTER__HOST);
876
877 return;
878 }
879 try_again:
880 al->map = map_groups__find(mg, type, al->addr);
881 if (al->map == NULL) {
882 /*
883 * If this is outside of all known maps, and is a negative
884 * address, try to look it up in the kernel dso, as it might be
885 * a vsyscall or vdso (which executes in user-mode).
886 *
887 * XXX This is nasty, we should have a symbol list in the
888 * "[vdso]" dso, but for now lets use the old trick of looking
889 * in the whole kernel symbol list.
890 */
891 if (cpumode == PERF_RECORD_MISC_USER && machine &&
892 mg != &machine->kmaps &&
893 machine__kernel_ip(machine, al->addr)) {
894 mg = &machine->kmaps;
895 load_map = true;
896 goto try_again;
897 }
898 } else {
899 /*
900 * Kernel maps might be changed when loading symbols so loading
901 * must be done prior to using kernel maps.
902 */
903 if (load_map)
904 map__load(al->map, machine->symbol_filter);
905 al->addr = al->map->map_ip(al->map, al->addr);
906 }
907 }
908
909 void thread__find_addr_location(struct thread *thread,
910 u8 cpumode, enum map_type type, u64 addr,
911 struct addr_location *al)
912 {
913 thread__find_addr_map(thread, cpumode, type, addr, al);
914 if (al->map != NULL)
915 al->sym = map__find_symbol(al->map, al->addr,
916 thread->mg->machine->symbol_filter);
917 else
918 al->sym = NULL;
919 }
920
921 /*
922 * Callers need to drop the reference to al->thread, obtained in
923 * machine__findnew_thread()
924 */
925 int perf_event__preprocess_sample(const union perf_event *event,
926 struct machine *machine,
927 struct addr_location *al,
928 struct perf_sample *sample)
929 {
930 u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
931 struct thread *thread = machine__findnew_thread(machine, sample->pid,
932 sample->tid);
933
934 if (thread == NULL)
935 return -1;
936
937 dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
938 /*
939 * Have we already created the kernel maps for this machine?
940 *
941 * This should have happened earlier, when we processed the kernel MMAP
942 * events, but for older perf.data files there was no such thing, so do
943 * it now.
944 */
945 if (cpumode == PERF_RECORD_MISC_KERNEL &&
946 machine->vmlinux_maps[MAP__FUNCTION] == NULL)
947 machine__create_kernel_maps(machine);
948
949 thread__find_addr_map(thread, cpumode, MAP__FUNCTION, sample->ip, al);
950 dump_printf(" ...... dso: %s\n",
951 al->map ? al->map->dso->long_name :
952 al->level == 'H' ? "[hypervisor]" : "<not found>");
953
954 if (thread__is_filtered(thread))
955 al->filtered |= (1 << HIST_FILTER__THREAD);
956
957 al->sym = NULL;
958 al->cpu = sample->cpu;
959
960 if (al->map) {
961 struct dso *dso = al->map->dso;
962
963 if (symbol_conf.dso_list &&
964 (!dso || !(strlist__has_entry(symbol_conf.dso_list,
965 dso->short_name) ||
966 (dso->short_name != dso->long_name &&
967 strlist__has_entry(symbol_conf.dso_list,
968 dso->long_name))))) {
969 al->filtered |= (1 << HIST_FILTER__DSO);
970 }
971
972 al->sym = map__find_symbol(al->map, al->addr,
973 machine->symbol_filter);
974 }
975
976 if (symbol_conf.sym_list &&
977 (!al->sym || !strlist__has_entry(symbol_conf.sym_list,
978 al->sym->name))) {
979 al->filtered |= (1 << HIST_FILTER__SYMBOL);
980 }
981
982 return 0;
983 }
984
985 /*
986 * The preprocess_sample method will return with reference counts for the
987 * in it, when done using (and perhaps getting ref counts if needing to
988 * keep a pointer to one of those entries) it must be paired with
989 * addr_location__put(), so that the refcounts can be decremented.
990 */
991 void addr_location__put(struct addr_location *al)
992 {
993 thread__zput(al->thread);
994 }
995
996 bool is_bts_event(struct perf_event_attr *attr)
997 {
998 return attr->type == PERF_TYPE_HARDWARE &&
999 (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) &&
1000 attr->sample_period == 1;
1001 }
1002
1003 bool sample_addr_correlates_sym(struct perf_event_attr *attr)
1004 {
1005 if (attr->type == PERF_TYPE_SOFTWARE &&
1006 (attr->config == PERF_COUNT_SW_PAGE_FAULTS ||
1007 attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
1008 attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ))
1009 return true;
1010
1011 if (is_bts_event(attr))
1012 return true;
1013
1014 return false;
1015 }
1016
1017 void perf_event__preprocess_sample_addr(union perf_event *event,
1018 struct perf_sample *sample,
1019 struct thread *thread,
1020 struct addr_location *al)
1021 {
1022 u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
1023
1024 thread__find_addr_map(thread, cpumode, MAP__FUNCTION, sample->addr, al);
1025 if (!al->map)
1026 thread__find_addr_map(thread, cpumode, MAP__VARIABLE,
1027 sample->addr, al);
1028
1029 al->cpu = sample->cpu;
1030 al->sym = NULL;
1031
1032 if (al->map)
1033 al->sym = map__find_symbol(al->map, al->addr, NULL);
1034 }
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