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perf tools: Make options always available, even if required libs not linked
[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_LOST_SAMPLES] = "LOST_SAMPLES",
29 [PERF_RECORD_SWITCH] = "SWITCH",
30 [PERF_RECORD_SWITCH_CPU_WIDE] = "SWITCH_CPU_WIDE",
31 [PERF_RECORD_HEADER_ATTR] = "ATTR",
32 [PERF_RECORD_HEADER_EVENT_TYPE] = "EVENT_TYPE",
33 [PERF_RECORD_HEADER_TRACING_DATA] = "TRACING_DATA",
34 [PERF_RECORD_HEADER_BUILD_ID] = "BUILD_ID",
35 [PERF_RECORD_FINISHED_ROUND] = "FINISHED_ROUND",
36 [PERF_RECORD_ID_INDEX] = "ID_INDEX",
37 [PERF_RECORD_AUXTRACE_INFO] = "AUXTRACE_INFO",
38 [PERF_RECORD_AUXTRACE] = "AUXTRACE",
39 [PERF_RECORD_AUXTRACE_ERROR] = "AUXTRACE_ERROR",
40 };
41
42 const char *perf_event__name(unsigned int id)
43 {
44 if (id >= ARRAY_SIZE(perf_event__names))
45 return "INVALID";
46 if (!perf_event__names[id])
47 return "UNKNOWN";
48 return perf_event__names[id];
49 }
50
51 static struct perf_sample synth_sample = {
52 .pid = -1,
53 .tid = -1,
54 .time = -1,
55 .stream_id = -1,
56 .cpu = -1,
57 .period = 1,
58 };
59
60 /*
61 * Assumes that the first 4095 bytes of /proc/pid/stat contains
62 * the comm, tgid and ppid.
63 */
64 static int perf_event__get_comm_ids(pid_t pid, char *comm, size_t len,
65 pid_t *tgid, pid_t *ppid)
66 {
67 char filename[PATH_MAX];
68 char bf[4096];
69 int fd;
70 size_t size = 0;
71 ssize_t n;
72 char *nl, *name, *tgids, *ppids;
73
74 *tgid = -1;
75 *ppid = -1;
76
77 snprintf(filename, sizeof(filename), "/proc/%d/status", pid);
78
79 fd = open(filename, O_RDONLY);
80 if (fd < 0) {
81 pr_debug("couldn't open %s\n", filename);
82 return -1;
83 }
84
85 n = read(fd, bf, sizeof(bf) - 1);
86 close(fd);
87 if (n <= 0) {
88 pr_warning("Couldn't get COMM, tigd and ppid for pid %d\n",
89 pid);
90 return -1;
91 }
92 bf[n] = '\0';
93
94 name = strstr(bf, "Name:");
95 tgids = strstr(bf, "Tgid:");
96 ppids = strstr(bf, "PPid:");
97
98 if (name) {
99 name += 5; /* strlen("Name:") */
100
101 while (*name && isspace(*name))
102 ++name;
103
104 nl = strchr(name, '\n');
105 if (nl)
106 *nl = '\0';
107
108 size = strlen(name);
109 if (size >= len)
110 size = len - 1;
111 memcpy(comm, name, size);
112 comm[size] = '\0';
113 } else {
114 pr_debug("Name: string not found for pid %d\n", pid);
115 }
116
117 if (tgids) {
118 tgids += 5; /* strlen("Tgid:") */
119 *tgid = atoi(tgids);
120 } else {
121 pr_debug("Tgid: string not found for pid %d\n", pid);
122 }
123
124 if (ppids) {
125 ppids += 5; /* strlen("PPid:") */
126 *ppid = atoi(ppids);
127 } else {
128 pr_debug("PPid: string not found for pid %d\n", pid);
129 }
130
131 return 0;
132 }
133
134 static int perf_event__prepare_comm(union perf_event *event, pid_t pid,
135 struct machine *machine,
136 pid_t *tgid, pid_t *ppid)
137 {
138 size_t size;
139
140 *ppid = -1;
141
142 memset(&event->comm, 0, sizeof(event->comm));
143
144 if (machine__is_host(machine)) {
145 if (perf_event__get_comm_ids(pid, event->comm.comm,
146 sizeof(event->comm.comm),
147 tgid, ppid) != 0) {
148 return -1;
149 }
150 } else {
151 *tgid = machine->pid;
152 }
153
154 if (*tgid < 0)
155 return -1;
156
157 event->comm.pid = *tgid;
158 event->comm.header.type = PERF_RECORD_COMM;
159
160 size = strlen(event->comm.comm) + 1;
161 size = PERF_ALIGN(size, sizeof(u64));
162 memset(event->comm.comm + size, 0, machine->id_hdr_size);
163 event->comm.header.size = (sizeof(event->comm) -
164 (sizeof(event->comm.comm) - size) +
165 machine->id_hdr_size);
166 event->comm.tid = pid;
167
168 return 0;
169 }
170
171 pid_t perf_event__synthesize_comm(struct perf_tool *tool,
172 union perf_event *event, pid_t pid,
173 perf_event__handler_t process,
174 struct machine *machine)
175 {
176 pid_t tgid, ppid;
177
178 if (perf_event__prepare_comm(event, pid, machine, &tgid, &ppid) != 0)
179 return -1;
180
181 if (process(tool, event, &synth_sample, machine) != 0)
182 return -1;
183
184 return tgid;
185 }
186
187 static int perf_event__synthesize_fork(struct perf_tool *tool,
188 union perf_event *event,
189 pid_t pid, pid_t tgid, pid_t ppid,
190 perf_event__handler_t process,
191 struct machine *machine)
192 {
193 memset(&event->fork, 0, sizeof(event->fork) + machine->id_hdr_size);
194
195 /*
196 * for main thread set parent to ppid from status file. For other
197 * threads set parent pid to main thread. ie., assume main thread
198 * spawns all threads in a process
199 */
200 if (tgid == pid) {
201 event->fork.ppid = ppid;
202 event->fork.ptid = ppid;
203 } else {
204 event->fork.ppid = tgid;
205 event->fork.ptid = tgid;
206 }
207 event->fork.pid = tgid;
208 event->fork.tid = pid;
209 event->fork.header.type = PERF_RECORD_FORK;
210
211 event->fork.header.size = (sizeof(event->fork) + machine->id_hdr_size);
212
213 if (process(tool, event, &synth_sample, machine) != 0)
214 return -1;
215
216 return 0;
217 }
218
219 int perf_event__synthesize_mmap_events(struct perf_tool *tool,
220 union perf_event *event,
221 pid_t pid, pid_t tgid,
222 perf_event__handler_t process,
223 struct machine *machine,
224 bool mmap_data,
225 unsigned int proc_map_timeout)
226 {
227 char filename[PATH_MAX];
228 FILE *fp;
229 unsigned long long t;
230 bool truncation = false;
231 unsigned long long timeout = proc_map_timeout * 1000000ULL;
232 int rc = 0;
233
234 if (machine__is_default_guest(machine))
235 return 0;
236
237 snprintf(filename, sizeof(filename), "%s/proc/%d/maps",
238 machine->root_dir, pid);
239
240 fp = fopen(filename, "r");
241 if (fp == NULL) {
242 /*
243 * We raced with a task exiting - just return:
244 */
245 pr_debug("couldn't open %s\n", filename);
246 return -1;
247 }
248
249 event->header.type = PERF_RECORD_MMAP2;
250 t = rdclock();
251
252 while (1) {
253 char bf[BUFSIZ];
254 char prot[5];
255 char execname[PATH_MAX];
256 char anonstr[] = "//anon";
257 unsigned int ino;
258 size_t size;
259 ssize_t n;
260
261 if (fgets(bf, sizeof(bf), fp) == NULL)
262 break;
263
264 if ((rdclock() - t) > timeout) {
265 pr_warning("Reading %s time out. "
266 "You may want to increase "
267 "the time limit by --proc-map-timeout\n",
268 filename);
269 truncation = true;
270 goto out;
271 }
272
273 /* ensure null termination since stack will be reused. */
274 strcpy(execname, "");
275
276 /* 00400000-0040c000 r-xp 00000000 fd:01 41038 /bin/cat */
277 n = sscanf(bf, "%"PRIx64"-%"PRIx64" %s %"PRIx64" %x:%x %u %s\n",
278 &event->mmap2.start, &event->mmap2.len, prot,
279 &event->mmap2.pgoff, &event->mmap2.maj,
280 &event->mmap2.min,
281 &ino, execname);
282
283 /*
284 * Anon maps don't have the execname.
285 */
286 if (n < 7)
287 continue;
288
289 event->mmap2.ino = (u64)ino;
290
291 /*
292 * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
293 */
294 if (machine__is_host(machine))
295 event->header.misc = PERF_RECORD_MISC_USER;
296 else
297 event->header.misc = PERF_RECORD_MISC_GUEST_USER;
298
299 /* map protection and flags bits */
300 event->mmap2.prot = 0;
301 event->mmap2.flags = 0;
302 if (prot[0] == 'r')
303 event->mmap2.prot |= PROT_READ;
304 if (prot[1] == 'w')
305 event->mmap2.prot |= PROT_WRITE;
306 if (prot[2] == 'x')
307 event->mmap2.prot |= PROT_EXEC;
308
309 if (prot[3] == 's')
310 event->mmap2.flags |= MAP_SHARED;
311 else
312 event->mmap2.flags |= MAP_PRIVATE;
313
314 if (prot[2] != 'x') {
315 if (!mmap_data || prot[0] != 'r')
316 continue;
317
318 event->header.misc |= PERF_RECORD_MISC_MMAP_DATA;
319 }
320
321 out:
322 if (truncation)
323 event->header.misc |= PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT;
324
325 if (!strcmp(execname, ""))
326 strcpy(execname, anonstr);
327
328 size = strlen(execname) + 1;
329 memcpy(event->mmap2.filename, execname, size);
330 size = PERF_ALIGN(size, sizeof(u64));
331 event->mmap2.len -= event->mmap.start;
332 event->mmap2.header.size = (sizeof(event->mmap2) -
333 (sizeof(event->mmap2.filename) - size));
334 memset(event->mmap2.filename + size, 0, machine->id_hdr_size);
335 event->mmap2.header.size += machine->id_hdr_size;
336 event->mmap2.pid = tgid;
337 event->mmap2.tid = pid;
338
339 if (process(tool, event, &synth_sample, machine) != 0) {
340 rc = -1;
341 break;
342 }
343
344 if (truncation)
345 break;
346 }
347
348 fclose(fp);
349 return rc;
350 }
351
352 int perf_event__synthesize_modules(struct perf_tool *tool,
353 perf_event__handler_t process,
354 struct machine *machine)
355 {
356 int rc = 0;
357 struct map *pos;
358 struct map_groups *kmaps = &machine->kmaps;
359 struct maps *maps = &kmaps->maps[MAP__FUNCTION];
360 union perf_event *event = zalloc((sizeof(event->mmap) +
361 machine->id_hdr_size));
362 if (event == NULL) {
363 pr_debug("Not enough memory synthesizing mmap event "
364 "for kernel modules\n");
365 return -1;
366 }
367
368 event->header.type = PERF_RECORD_MMAP;
369
370 /*
371 * kernel uses 0 for user space maps, see kernel/perf_event.c
372 * __perf_event_mmap
373 */
374 if (machine__is_host(machine))
375 event->header.misc = PERF_RECORD_MISC_KERNEL;
376 else
377 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
378
379 for (pos = maps__first(maps); pos; pos = map__next(pos)) {
380 size_t size;
381
382 if (__map__is_kernel(pos))
383 continue;
384
385 size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
386 event->mmap.header.type = PERF_RECORD_MMAP;
387 event->mmap.header.size = (sizeof(event->mmap) -
388 (sizeof(event->mmap.filename) - size));
389 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
390 event->mmap.header.size += machine->id_hdr_size;
391 event->mmap.start = pos->start;
392 event->mmap.len = pos->end - pos->start;
393 event->mmap.pid = machine->pid;
394
395 memcpy(event->mmap.filename, pos->dso->long_name,
396 pos->dso->long_name_len + 1);
397 if (process(tool, event, &synth_sample, machine) != 0) {
398 rc = -1;
399 break;
400 }
401 }
402
403 free(event);
404 return rc;
405 }
406
407 static int __event__synthesize_thread(union perf_event *comm_event,
408 union perf_event *mmap_event,
409 union perf_event *fork_event,
410 pid_t pid, int full,
411 perf_event__handler_t process,
412 struct perf_tool *tool,
413 struct machine *machine,
414 bool mmap_data,
415 unsigned int proc_map_timeout)
416 {
417 char filename[PATH_MAX];
418 DIR *tasks;
419 struct dirent dirent, *next;
420 pid_t tgid, ppid;
421 int rc = 0;
422
423 /* special case: only send one comm event using passed in pid */
424 if (!full) {
425 tgid = perf_event__synthesize_comm(tool, comm_event, pid,
426 process, machine);
427
428 if (tgid == -1)
429 return -1;
430
431 return perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
432 process, machine, mmap_data,
433 proc_map_timeout);
434 }
435
436 if (machine__is_default_guest(machine))
437 return 0;
438
439 snprintf(filename, sizeof(filename), "%s/proc/%d/task",
440 machine->root_dir, pid);
441
442 tasks = opendir(filename);
443 if (tasks == NULL) {
444 pr_debug("couldn't open %s\n", filename);
445 return 0;
446 }
447
448 while (!readdir_r(tasks, &dirent, &next) && next) {
449 char *end;
450 pid_t _pid;
451
452 _pid = strtol(dirent.d_name, &end, 10);
453 if (*end)
454 continue;
455
456 rc = -1;
457 if (perf_event__prepare_comm(comm_event, _pid, machine,
458 &tgid, &ppid) != 0)
459 break;
460
461 if (perf_event__synthesize_fork(tool, fork_event, _pid, tgid,
462 ppid, process, machine) < 0)
463 break;
464 /*
465 * Send the prepared comm event
466 */
467 if (process(tool, comm_event, &synth_sample, machine) != 0)
468 break;
469
470 rc = 0;
471 if (_pid == pid) {
472 /* process the parent's maps too */
473 rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
474 process, machine, mmap_data, proc_map_timeout);
475 if (rc)
476 break;
477 }
478 }
479
480 closedir(tasks);
481 return rc;
482 }
483
484 int perf_event__synthesize_thread_map(struct perf_tool *tool,
485 struct thread_map *threads,
486 perf_event__handler_t process,
487 struct machine *machine,
488 bool mmap_data,
489 unsigned int proc_map_timeout)
490 {
491 union perf_event *comm_event, *mmap_event, *fork_event;
492 int err = -1, thread, j;
493
494 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
495 if (comm_event == NULL)
496 goto out;
497
498 mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size);
499 if (mmap_event == NULL)
500 goto out_free_comm;
501
502 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
503 if (fork_event == NULL)
504 goto out_free_mmap;
505
506 err = 0;
507 for (thread = 0; thread < threads->nr; ++thread) {
508 if (__event__synthesize_thread(comm_event, mmap_event,
509 fork_event,
510 thread_map__pid(threads, thread), 0,
511 process, tool, machine,
512 mmap_data, proc_map_timeout)) {
513 err = -1;
514 break;
515 }
516
517 /*
518 * comm.pid is set to thread group id by
519 * perf_event__synthesize_comm
520 */
521 if ((int) comm_event->comm.pid != thread_map__pid(threads, thread)) {
522 bool need_leader = true;
523
524 /* is thread group leader in thread_map? */
525 for (j = 0; j < threads->nr; ++j) {
526 if ((int) comm_event->comm.pid == thread_map__pid(threads, j)) {
527 need_leader = false;
528 break;
529 }
530 }
531
532 /* if not, generate events for it */
533 if (need_leader &&
534 __event__synthesize_thread(comm_event, mmap_event,
535 fork_event,
536 comm_event->comm.pid, 0,
537 process, tool, machine,
538 mmap_data, proc_map_timeout)) {
539 err = -1;
540 break;
541 }
542 }
543 }
544 free(fork_event);
545 out_free_mmap:
546 free(mmap_event);
547 out_free_comm:
548 free(comm_event);
549 out:
550 return err;
551 }
552
553 int perf_event__synthesize_threads(struct perf_tool *tool,
554 perf_event__handler_t process,
555 struct machine *machine,
556 bool mmap_data,
557 unsigned int proc_map_timeout)
558 {
559 DIR *proc;
560 char proc_path[PATH_MAX];
561 struct dirent dirent, *next;
562 union perf_event *comm_event, *mmap_event, *fork_event;
563 int err = -1;
564
565 if (machine__is_default_guest(machine))
566 return 0;
567
568 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
569 if (comm_event == NULL)
570 goto out;
571
572 mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size);
573 if (mmap_event == NULL)
574 goto out_free_comm;
575
576 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
577 if (fork_event == NULL)
578 goto out_free_mmap;
579
580 snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir);
581 proc = opendir(proc_path);
582
583 if (proc == NULL)
584 goto out_free_fork;
585
586 while (!readdir_r(proc, &dirent, &next) && next) {
587 char *end;
588 pid_t pid = strtol(dirent.d_name, &end, 10);
589
590 if (*end) /* only interested in proper numerical dirents */
591 continue;
592 /*
593 * We may race with exiting thread, so don't stop just because
594 * one thread couldn't be synthesized.
595 */
596 __event__synthesize_thread(comm_event, mmap_event, fork_event, pid,
597 1, process, tool, machine, mmap_data,
598 proc_map_timeout);
599 }
600
601 err = 0;
602 closedir(proc);
603 out_free_fork:
604 free(fork_event);
605 out_free_mmap:
606 free(mmap_event);
607 out_free_comm:
608 free(comm_event);
609 out:
610 return err;
611 }
612
613 struct process_symbol_args {
614 const char *name;
615 u64 start;
616 };
617
618 static int find_symbol_cb(void *arg, const char *name, char type,
619 u64 start)
620 {
621 struct process_symbol_args *args = arg;
622
623 /*
624 * Must be a function or at least an alias, as in PARISC64, where "_text" is
625 * an 'A' to the same address as "_stext".
626 */
627 if (!(symbol_type__is_a(type, MAP__FUNCTION) ||
628 type == 'A') || strcmp(name, args->name))
629 return 0;
630
631 args->start = start;
632 return 1;
633 }
634
635 u64 kallsyms__get_function_start(const char *kallsyms_filename,
636 const char *symbol_name)
637 {
638 struct process_symbol_args args = { .name = symbol_name, };
639
640 if (kallsyms__parse(kallsyms_filename, &args, find_symbol_cb) <= 0)
641 return 0;
642
643 return args.start;
644 }
645
646 int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
647 perf_event__handler_t process,
648 struct machine *machine)
649 {
650 size_t size;
651 const char *mmap_name;
652 char name_buff[PATH_MAX];
653 struct map *map = machine__kernel_map(machine);
654 struct kmap *kmap;
655 int err;
656 union perf_event *event;
657
658 if (map == NULL)
659 return -1;
660
661 /*
662 * We should get this from /sys/kernel/sections/.text, but till that is
663 * available use this, and after it is use this as a fallback for older
664 * kernels.
665 */
666 event = zalloc((sizeof(event->mmap) + machine->id_hdr_size));
667 if (event == NULL) {
668 pr_debug("Not enough memory synthesizing mmap event "
669 "for kernel modules\n");
670 return -1;
671 }
672
673 mmap_name = machine__mmap_name(machine, name_buff, sizeof(name_buff));
674 if (machine__is_host(machine)) {
675 /*
676 * kernel uses PERF_RECORD_MISC_USER for user space maps,
677 * see kernel/perf_event.c __perf_event_mmap
678 */
679 event->header.misc = PERF_RECORD_MISC_KERNEL;
680 } else {
681 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
682 }
683
684 kmap = map__kmap(map);
685 size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
686 "%s%s", mmap_name, kmap->ref_reloc_sym->name) + 1;
687 size = PERF_ALIGN(size, sizeof(u64));
688 event->mmap.header.type = PERF_RECORD_MMAP;
689 event->mmap.header.size = (sizeof(event->mmap) -
690 (sizeof(event->mmap.filename) - size) + machine->id_hdr_size);
691 event->mmap.pgoff = kmap->ref_reloc_sym->addr;
692 event->mmap.start = map->start;
693 event->mmap.len = map->end - event->mmap.start;
694 event->mmap.pid = machine->pid;
695
696 err = process(tool, event, &synth_sample, machine);
697 free(event);
698
699 return err;
700 }
701
702 size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
703 {
704 const char *s;
705
706 if (event->header.misc & PERF_RECORD_MISC_COMM_EXEC)
707 s = " exec";
708 else
709 s = "";
710
711 return fprintf(fp, "%s: %s:%d/%d\n", s, event->comm.comm, event->comm.pid, event->comm.tid);
712 }
713
714 int perf_event__process_comm(struct perf_tool *tool __maybe_unused,
715 union perf_event *event,
716 struct perf_sample *sample,
717 struct machine *machine)
718 {
719 return machine__process_comm_event(machine, event, sample);
720 }
721
722 int perf_event__process_lost(struct perf_tool *tool __maybe_unused,
723 union perf_event *event,
724 struct perf_sample *sample,
725 struct machine *machine)
726 {
727 return machine__process_lost_event(machine, event, sample);
728 }
729
730 int perf_event__process_aux(struct perf_tool *tool __maybe_unused,
731 union perf_event *event,
732 struct perf_sample *sample __maybe_unused,
733 struct machine *machine)
734 {
735 return machine__process_aux_event(machine, event);
736 }
737
738 int perf_event__process_itrace_start(struct perf_tool *tool __maybe_unused,
739 union perf_event *event,
740 struct perf_sample *sample __maybe_unused,
741 struct machine *machine)
742 {
743 return machine__process_itrace_start_event(machine, event);
744 }
745
746 int perf_event__process_lost_samples(struct perf_tool *tool __maybe_unused,
747 union perf_event *event,
748 struct perf_sample *sample,
749 struct machine *machine)
750 {
751 return machine__process_lost_samples_event(machine, event, sample);
752 }
753
754 int perf_event__process_switch(struct perf_tool *tool __maybe_unused,
755 union perf_event *event,
756 struct perf_sample *sample __maybe_unused,
757 struct machine *machine)
758 {
759 return machine__process_switch_event(machine, event);
760 }
761
762 size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
763 {
764 return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %c %s\n",
765 event->mmap.pid, event->mmap.tid, event->mmap.start,
766 event->mmap.len, event->mmap.pgoff,
767 (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x',
768 event->mmap.filename);
769 }
770
771 size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp)
772 {
773 return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64
774 " %02x:%02x %"PRIu64" %"PRIu64"]: %c%c%c%c %s\n",
775 event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
776 event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj,
777 event->mmap2.min, event->mmap2.ino,
778 event->mmap2.ino_generation,
779 (event->mmap2.prot & PROT_READ) ? 'r' : '-',
780 (event->mmap2.prot & PROT_WRITE) ? 'w' : '-',
781 (event->mmap2.prot & PROT_EXEC) ? 'x' : '-',
782 (event->mmap2.flags & MAP_SHARED) ? 's' : 'p',
783 event->mmap2.filename);
784 }
785
786 int perf_event__process_mmap(struct perf_tool *tool __maybe_unused,
787 union perf_event *event,
788 struct perf_sample *sample,
789 struct machine *machine)
790 {
791 return machine__process_mmap_event(machine, event, sample);
792 }
793
794 int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused,
795 union perf_event *event,
796 struct perf_sample *sample,
797 struct machine *machine)
798 {
799 return machine__process_mmap2_event(machine, event, sample);
800 }
801
802 size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
803 {
804 return fprintf(fp, "(%d:%d):(%d:%d)\n",
805 event->fork.pid, event->fork.tid,
806 event->fork.ppid, event->fork.ptid);
807 }
808
809 int perf_event__process_fork(struct perf_tool *tool __maybe_unused,
810 union perf_event *event,
811 struct perf_sample *sample,
812 struct machine *machine)
813 {
814 return machine__process_fork_event(machine, event, sample);
815 }
816
817 int perf_event__process_exit(struct perf_tool *tool __maybe_unused,
818 union perf_event *event,
819 struct perf_sample *sample,
820 struct machine *machine)
821 {
822 return machine__process_exit_event(machine, event, sample);
823 }
824
825 size_t perf_event__fprintf_aux(union perf_event *event, FILE *fp)
826 {
827 return fprintf(fp, " offset: %#"PRIx64" size: %#"PRIx64" flags: %#"PRIx64" [%s%s]\n",
828 event->aux.aux_offset, event->aux.aux_size,
829 event->aux.flags,
830 event->aux.flags & PERF_AUX_FLAG_TRUNCATED ? "T" : "",
831 event->aux.flags & PERF_AUX_FLAG_OVERWRITE ? "O" : "");
832 }
833
834 size_t perf_event__fprintf_itrace_start(union perf_event *event, FILE *fp)
835 {
836 return fprintf(fp, " pid: %u tid: %u\n",
837 event->itrace_start.pid, event->itrace_start.tid);
838 }
839
840 size_t perf_event__fprintf_switch(union perf_event *event, FILE *fp)
841 {
842 bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT;
843 const char *in_out = out ? "OUT" : "IN ";
844
845 if (event->header.type == PERF_RECORD_SWITCH)
846 return fprintf(fp, " %s\n", in_out);
847
848 return fprintf(fp, " %s %s pid/tid: %5u/%-5u\n",
849 in_out, out ? "next" : "prev",
850 event->context_switch.next_prev_pid,
851 event->context_switch.next_prev_tid);
852 }
853
854 size_t perf_event__fprintf(union perf_event *event, FILE *fp)
855 {
856 size_t ret = fprintf(fp, "PERF_RECORD_%s",
857 perf_event__name(event->header.type));
858
859 switch (event->header.type) {
860 case PERF_RECORD_COMM:
861 ret += perf_event__fprintf_comm(event, fp);
862 break;
863 case PERF_RECORD_FORK:
864 case PERF_RECORD_EXIT:
865 ret += perf_event__fprintf_task(event, fp);
866 break;
867 case PERF_RECORD_MMAP:
868 ret += perf_event__fprintf_mmap(event, fp);
869 break;
870 case PERF_RECORD_MMAP2:
871 ret += perf_event__fprintf_mmap2(event, fp);
872 break;
873 case PERF_RECORD_AUX:
874 ret += perf_event__fprintf_aux(event, fp);
875 break;
876 case PERF_RECORD_ITRACE_START:
877 ret += perf_event__fprintf_itrace_start(event, fp);
878 break;
879 case PERF_RECORD_SWITCH:
880 case PERF_RECORD_SWITCH_CPU_WIDE:
881 ret += perf_event__fprintf_switch(event, fp);
882 break;
883 default:
884 ret += fprintf(fp, "\n");
885 }
886
887 return ret;
888 }
889
890 int perf_event__process(struct perf_tool *tool __maybe_unused,
891 union perf_event *event,
892 struct perf_sample *sample,
893 struct machine *machine)
894 {
895 return machine__process_event(machine, event, sample);
896 }
897
898 void thread__find_addr_map(struct thread *thread, u8 cpumode,
899 enum map_type type, u64 addr,
900 struct addr_location *al)
901 {
902 struct map_groups *mg = thread->mg;
903 struct machine *machine = mg->machine;
904 bool load_map = false;
905
906 al->machine = machine;
907 al->thread = thread;
908 al->addr = addr;
909 al->cpumode = cpumode;
910 al->filtered = 0;
911
912 if (machine == NULL) {
913 al->map = NULL;
914 return;
915 }
916
917 if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
918 al->level = 'k';
919 mg = &machine->kmaps;
920 load_map = true;
921 } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
922 al->level = '.';
923 } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
924 al->level = 'g';
925 mg = &machine->kmaps;
926 load_map = true;
927 } else if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) {
928 al->level = 'u';
929 } else {
930 al->level = 'H';
931 al->map = NULL;
932
933 if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
934 cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
935 !perf_guest)
936 al->filtered |= (1 << HIST_FILTER__GUEST);
937 if ((cpumode == PERF_RECORD_MISC_USER ||
938 cpumode == PERF_RECORD_MISC_KERNEL) &&
939 !perf_host)
940 al->filtered |= (1 << HIST_FILTER__HOST);
941
942 return;
943 }
944 try_again:
945 al->map = map_groups__find(mg, type, al->addr);
946 if (al->map == NULL) {
947 /*
948 * If this is outside of all known maps, and is a negative
949 * address, try to look it up in the kernel dso, as it might be
950 * a vsyscall or vdso (which executes in user-mode).
951 *
952 * XXX This is nasty, we should have a symbol list in the
953 * "[vdso]" dso, but for now lets use the old trick of looking
954 * in the whole kernel symbol list.
955 */
956 if (cpumode == PERF_RECORD_MISC_USER && machine &&
957 mg != &machine->kmaps &&
958 machine__kernel_ip(machine, al->addr)) {
959 mg = &machine->kmaps;
960 load_map = true;
961 goto try_again;
962 }
963 } else {
964 /*
965 * Kernel maps might be changed when loading symbols so loading
966 * must be done prior to using kernel maps.
967 */
968 if (load_map)
969 map__load(al->map, machine->symbol_filter);
970 al->addr = al->map->map_ip(al->map, al->addr);
971 }
972 }
973
974 void thread__find_addr_location(struct thread *thread,
975 u8 cpumode, enum map_type type, u64 addr,
976 struct addr_location *al)
977 {
978 thread__find_addr_map(thread, cpumode, type, addr, al);
979 if (al->map != NULL)
980 al->sym = map__find_symbol(al->map, al->addr,
981 thread->mg->machine->symbol_filter);
982 else
983 al->sym = NULL;
984 }
985
986 /*
987 * Callers need to drop the reference to al->thread, obtained in
988 * machine__findnew_thread()
989 */
990 int perf_event__preprocess_sample(const union perf_event *event,
991 struct machine *machine,
992 struct addr_location *al,
993 struct perf_sample *sample)
994 {
995 u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
996 struct thread *thread = machine__findnew_thread(machine, sample->pid,
997 sample->tid);
998
999 if (thread == NULL)
1000 return -1;
1001
1002 dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
1003 /*
1004 * Have we already created the kernel maps for this machine?
1005 *
1006 * This should have happened earlier, when we processed the kernel MMAP
1007 * events, but for older perf.data files there was no such thing, so do
1008 * it now.
1009 */
1010 if (cpumode == PERF_RECORD_MISC_KERNEL &&
1011 machine__kernel_map(machine) == NULL)
1012 machine__create_kernel_maps(machine);
1013
1014 thread__find_addr_map(thread, cpumode, MAP__FUNCTION, sample->ip, al);
1015 dump_printf(" ...... dso: %s\n",
1016 al->map ? al->map->dso->long_name :
1017 al->level == 'H' ? "[hypervisor]" : "<not found>");
1018
1019 if (thread__is_filtered(thread))
1020 al->filtered |= (1 << HIST_FILTER__THREAD);
1021
1022 al->sym = NULL;
1023 al->cpu = sample->cpu;
1024 al->socket = -1;
1025
1026 if (al->cpu >= 0) {
1027 struct perf_env *env = machine->env;
1028
1029 if (env && env->cpu)
1030 al->socket = env->cpu[al->cpu].socket_id;
1031 }
1032
1033 if (al->map) {
1034 struct dso *dso = al->map->dso;
1035
1036 if (symbol_conf.dso_list &&
1037 (!dso || !(strlist__has_entry(symbol_conf.dso_list,
1038 dso->short_name) ||
1039 (dso->short_name != dso->long_name &&
1040 strlist__has_entry(symbol_conf.dso_list,
1041 dso->long_name))))) {
1042 al->filtered |= (1 << HIST_FILTER__DSO);
1043 }
1044
1045 al->sym = map__find_symbol(al->map, al->addr,
1046 machine->symbol_filter);
1047 }
1048
1049 if (symbol_conf.sym_list &&
1050 (!al->sym || !strlist__has_entry(symbol_conf.sym_list,
1051 al->sym->name))) {
1052 al->filtered |= (1 << HIST_FILTER__SYMBOL);
1053 }
1054
1055 return 0;
1056 }
1057
1058 /*
1059 * The preprocess_sample method will return with reference counts for the
1060 * in it, when done using (and perhaps getting ref counts if needing to
1061 * keep a pointer to one of those entries) it must be paired with
1062 * addr_location__put(), so that the refcounts can be decremented.
1063 */
1064 void addr_location__put(struct addr_location *al)
1065 {
1066 thread__zput(al->thread);
1067 }
1068
1069 bool is_bts_event(struct perf_event_attr *attr)
1070 {
1071 return attr->type == PERF_TYPE_HARDWARE &&
1072 (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) &&
1073 attr->sample_period == 1;
1074 }
1075
1076 bool sample_addr_correlates_sym(struct perf_event_attr *attr)
1077 {
1078 if (attr->type == PERF_TYPE_SOFTWARE &&
1079 (attr->config == PERF_COUNT_SW_PAGE_FAULTS ||
1080 attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
1081 attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ))
1082 return true;
1083
1084 if (is_bts_event(attr))
1085 return true;
1086
1087 return false;
1088 }
1089
1090 void perf_event__preprocess_sample_addr(union perf_event *event,
1091 struct perf_sample *sample,
1092 struct thread *thread,
1093 struct addr_location *al)
1094 {
1095 u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
1096
1097 thread__find_addr_map(thread, cpumode, MAP__FUNCTION, sample->addr, al);
1098 if (!al->map)
1099 thread__find_addr_map(thread, cpumode, MAP__VARIABLE,
1100 sample->addr, al);
1101
1102 al->cpu = sample->cpu;
1103 al->sym = NULL;
1104
1105 if (al->map)
1106 al->sym = map__find_symbol(al->map, al->addr, NULL);
1107 }
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