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Merge branch 'for-linus-4.2' of git://git.kernel.org/pub/scm/linux/kernel/git/mason...
[deliverable/linux.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_HEADER_ATTR] = "ATTR",
30 [PERF_RECORD_HEADER_EVENT_TYPE] = "EVENT_TYPE",
31 [PERF_RECORD_HEADER_TRACING_DATA] = "TRACING_DATA",
32 [PERF_RECORD_HEADER_BUILD_ID] = "BUILD_ID",
33 [PERF_RECORD_FINISHED_ROUND] = "FINISHED_ROUND",
34 [PERF_RECORD_ID_INDEX] = "ID_INDEX",
35 [PERF_RECORD_AUXTRACE_INFO] = "AUXTRACE_INFO",
36 [PERF_RECORD_AUXTRACE] = "AUXTRACE",
37 [PERF_RECORD_AUXTRACE_ERROR] = "AUXTRACE_ERROR",
38 };
39
40 const char *perf_event__name(unsigned int id)
41 {
42 if (id >= ARRAY_SIZE(perf_event__names))
43 return "INVALID";
44 if (!perf_event__names[id])
45 return "UNKNOWN";
46 return perf_event__names[id];
47 }
48
49 static struct perf_sample synth_sample = {
50 .pid = -1,
51 .tid = -1,
52 .time = -1,
53 .stream_id = -1,
54 .cpu = -1,
55 .period = 1,
56 };
57
58 /*
59 * Assumes that the first 4095 bytes of /proc/pid/stat contains
60 * the comm, tgid and ppid.
61 */
62 static int perf_event__get_comm_ids(pid_t pid, char *comm, size_t len,
63 pid_t *tgid, pid_t *ppid)
64 {
65 char filename[PATH_MAX];
66 char bf[4096];
67 int fd;
68 size_t size = 0, n;
69 char *nl, *name, *tgids, *ppids;
70
71 *tgid = -1;
72 *ppid = -1;
73
74 snprintf(filename, sizeof(filename), "/proc/%d/status", pid);
75
76 fd = open(filename, O_RDONLY);
77 if (fd < 0) {
78 pr_debug("couldn't open %s\n", filename);
79 return -1;
80 }
81
82 n = read(fd, bf, sizeof(bf) - 1);
83 close(fd);
84 if (n <= 0) {
85 pr_warning("Couldn't get COMM, tigd and ppid for pid %d\n",
86 pid);
87 return -1;
88 }
89 bf[n] = '\0';
90
91 name = strstr(bf, "Name:");
92 tgids = strstr(bf, "Tgid:");
93 ppids = strstr(bf, "PPid:");
94
95 if (name) {
96 name += 5; /* strlen("Name:") */
97
98 while (*name && isspace(*name))
99 ++name;
100
101 nl = strchr(name, '\n');
102 if (nl)
103 *nl = '\0';
104
105 size = strlen(name);
106 if (size >= len)
107 size = len - 1;
108 memcpy(comm, name, size);
109 comm[size] = '\0';
110 } else {
111 pr_debug("Name: string not found for pid %d\n", pid);
112 }
113
114 if (tgids) {
115 tgids += 5; /* strlen("Tgid:") */
116 *tgid = atoi(tgids);
117 } else {
118 pr_debug("Tgid: string not found for pid %d\n", pid);
119 }
120
121 if (ppids) {
122 ppids += 5; /* strlen("PPid:") */
123 *ppid = atoi(ppids);
124 } else {
125 pr_debug("PPid: string not found for pid %d\n", pid);
126 }
127
128 return 0;
129 }
130
131 static int perf_event__prepare_comm(union perf_event *event, pid_t pid,
132 struct machine *machine,
133 pid_t *tgid, pid_t *ppid)
134 {
135 size_t size;
136
137 *ppid = -1;
138
139 memset(&event->comm, 0, sizeof(event->comm));
140
141 if (machine__is_host(machine)) {
142 if (perf_event__get_comm_ids(pid, event->comm.comm,
143 sizeof(event->comm.comm),
144 tgid, ppid) != 0) {
145 return -1;
146 }
147 } else {
148 *tgid = machine->pid;
149 }
150
151 if (*tgid < 0)
152 return -1;
153
154 event->comm.pid = *tgid;
155 event->comm.header.type = PERF_RECORD_COMM;
156
157 size = strlen(event->comm.comm) + 1;
158 size = PERF_ALIGN(size, sizeof(u64));
159 memset(event->comm.comm + size, 0, machine->id_hdr_size);
160 event->comm.header.size = (sizeof(event->comm) -
161 (sizeof(event->comm.comm) - size) +
162 machine->id_hdr_size);
163 event->comm.tid = pid;
164
165 return 0;
166 }
167
168 static pid_t perf_event__synthesize_comm(struct perf_tool *tool,
169 union perf_event *event, pid_t pid,
170 perf_event__handler_t process,
171 struct machine *machine)
172 {
173 pid_t tgid, ppid;
174
175 if (perf_event__prepare_comm(event, pid, machine, &tgid, &ppid) != 0)
176 return -1;
177
178 if (process(tool, event, &synth_sample, machine) != 0)
179 return -1;
180
181 return tgid;
182 }
183
184 static int perf_event__synthesize_fork(struct perf_tool *tool,
185 union perf_event *event,
186 pid_t pid, pid_t tgid, pid_t ppid,
187 perf_event__handler_t process,
188 struct machine *machine)
189 {
190 memset(&event->fork, 0, sizeof(event->fork) + machine->id_hdr_size);
191
192 /*
193 * for main thread set parent to ppid from status file. For other
194 * threads set parent pid to main thread. ie., assume main thread
195 * spawns all threads in a process
196 */
197 if (tgid == pid) {
198 event->fork.ppid = ppid;
199 event->fork.ptid = ppid;
200 } else {
201 event->fork.ppid = tgid;
202 event->fork.ptid = tgid;
203 }
204 event->fork.pid = tgid;
205 event->fork.tid = pid;
206 event->fork.header.type = PERF_RECORD_FORK;
207
208 event->fork.header.size = (sizeof(event->fork) + machine->id_hdr_size);
209
210 if (process(tool, event, &synth_sample, machine) != 0)
211 return -1;
212
213 return 0;
214 }
215
216 int perf_event__synthesize_mmap_events(struct perf_tool *tool,
217 union perf_event *event,
218 pid_t pid, pid_t tgid,
219 perf_event__handler_t process,
220 struct machine *machine,
221 bool mmap_data,
222 unsigned int proc_map_timeout)
223 {
224 char filename[PATH_MAX];
225 FILE *fp;
226 unsigned long long t;
227 bool truncation = false;
228 unsigned long long timeout = proc_map_timeout * 1000000ULL;
229 int rc = 0;
230
231 if (machine__is_default_guest(machine))
232 return 0;
233
234 snprintf(filename, sizeof(filename), "%s/proc/%d/maps",
235 machine->root_dir, pid);
236
237 fp = fopen(filename, "r");
238 if (fp == NULL) {
239 /*
240 * We raced with a task exiting - just return:
241 */
242 pr_debug("couldn't open %s\n", filename);
243 return -1;
244 }
245
246 event->header.type = PERF_RECORD_MMAP2;
247 t = rdclock();
248
249 while (1) {
250 char bf[BUFSIZ];
251 char prot[5];
252 char execname[PATH_MAX];
253 char anonstr[] = "//anon";
254 unsigned int ino;
255 size_t size;
256 ssize_t n;
257
258 if (fgets(bf, sizeof(bf), fp) == NULL)
259 break;
260
261 if ((rdclock() - t) > timeout) {
262 pr_warning("Reading %s time out. "
263 "You may want to increase "
264 "the time limit by --proc-map-timeout\n",
265 filename);
266 truncation = true;
267 goto out;
268 }
269
270 /* ensure null termination since stack will be reused. */
271 strcpy(execname, "");
272
273 /* 00400000-0040c000 r-xp 00000000 fd:01 41038 /bin/cat */
274 n = sscanf(bf, "%"PRIx64"-%"PRIx64" %s %"PRIx64" %x:%x %u %s\n",
275 &event->mmap2.start, &event->mmap2.len, prot,
276 &event->mmap2.pgoff, &event->mmap2.maj,
277 &event->mmap2.min,
278 &ino, execname);
279
280 /*
281 * Anon maps don't have the execname.
282 */
283 if (n < 7)
284 continue;
285
286 event->mmap2.ino = (u64)ino;
287
288 /*
289 * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
290 */
291 if (machine__is_host(machine))
292 event->header.misc = PERF_RECORD_MISC_USER;
293 else
294 event->header.misc = PERF_RECORD_MISC_GUEST_USER;
295
296 /* map protection and flags bits */
297 event->mmap2.prot = 0;
298 event->mmap2.flags = 0;
299 if (prot[0] == 'r')
300 event->mmap2.prot |= PROT_READ;
301 if (prot[1] == 'w')
302 event->mmap2.prot |= PROT_WRITE;
303 if (prot[2] == 'x')
304 event->mmap2.prot |= PROT_EXEC;
305
306 if (prot[3] == 's')
307 event->mmap2.flags |= MAP_SHARED;
308 else
309 event->mmap2.flags |= MAP_PRIVATE;
310
311 if (prot[2] != 'x') {
312 if (!mmap_data || prot[0] != 'r')
313 continue;
314
315 event->header.misc |= PERF_RECORD_MISC_MMAP_DATA;
316 }
317
318 out:
319 if (truncation)
320 event->header.misc |= PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT;
321
322 if (!strcmp(execname, ""))
323 strcpy(execname, anonstr);
324
325 size = strlen(execname) + 1;
326 memcpy(event->mmap2.filename, execname, size);
327 size = PERF_ALIGN(size, sizeof(u64));
328 event->mmap2.len -= event->mmap.start;
329 event->mmap2.header.size = (sizeof(event->mmap2) -
330 (sizeof(event->mmap2.filename) - size));
331 memset(event->mmap2.filename + size, 0, machine->id_hdr_size);
332 event->mmap2.header.size += machine->id_hdr_size;
333 event->mmap2.pid = tgid;
334 event->mmap2.tid = pid;
335
336 if (process(tool, event, &synth_sample, machine) != 0) {
337 rc = -1;
338 break;
339 }
340
341 if (truncation)
342 break;
343 }
344
345 fclose(fp);
346 return rc;
347 }
348
349 int perf_event__synthesize_modules(struct perf_tool *tool,
350 perf_event__handler_t process,
351 struct machine *machine)
352 {
353 int rc = 0;
354 struct map *pos;
355 struct map_groups *kmaps = &machine->kmaps;
356 struct maps *maps = &kmaps->maps[MAP__FUNCTION];
357 union perf_event *event = zalloc((sizeof(event->mmap) +
358 machine->id_hdr_size));
359 if (event == NULL) {
360 pr_debug("Not enough memory synthesizing mmap event "
361 "for kernel modules\n");
362 return -1;
363 }
364
365 event->header.type = PERF_RECORD_MMAP;
366
367 /*
368 * kernel uses 0 for user space maps, see kernel/perf_event.c
369 * __perf_event_mmap
370 */
371 if (machine__is_host(machine))
372 event->header.misc = PERF_RECORD_MISC_KERNEL;
373 else
374 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
375
376 for (pos = maps__first(maps); pos; pos = map__next(pos)) {
377 size_t size;
378
379 if (pos->dso->kernel)
380 continue;
381
382 size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
383 event->mmap.header.type = PERF_RECORD_MMAP;
384 event->mmap.header.size = (sizeof(event->mmap) -
385 (sizeof(event->mmap.filename) - size));
386 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
387 event->mmap.header.size += machine->id_hdr_size;
388 event->mmap.start = pos->start;
389 event->mmap.len = pos->end - pos->start;
390 event->mmap.pid = machine->pid;
391
392 memcpy(event->mmap.filename, pos->dso->long_name,
393 pos->dso->long_name_len + 1);
394 if (process(tool, event, &synth_sample, machine) != 0) {
395 rc = -1;
396 break;
397 }
398 }
399
400 free(event);
401 return rc;
402 }
403
404 static int __event__synthesize_thread(union perf_event *comm_event,
405 union perf_event *mmap_event,
406 union perf_event *fork_event,
407 pid_t pid, int full,
408 perf_event__handler_t process,
409 struct perf_tool *tool,
410 struct machine *machine,
411 bool mmap_data,
412 unsigned int proc_map_timeout)
413 {
414 char filename[PATH_MAX];
415 DIR *tasks;
416 struct dirent dirent, *next;
417 pid_t tgid, ppid;
418 int rc = 0;
419
420 /* special case: only send one comm event using passed in pid */
421 if (!full) {
422 tgid = perf_event__synthesize_comm(tool, comm_event, pid,
423 process, machine);
424
425 if (tgid == -1)
426 return -1;
427
428 return perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
429 process, machine, mmap_data,
430 proc_map_timeout);
431 }
432
433 if (machine__is_default_guest(machine))
434 return 0;
435
436 snprintf(filename, sizeof(filename), "%s/proc/%d/task",
437 machine->root_dir, pid);
438
439 tasks = opendir(filename);
440 if (tasks == NULL) {
441 pr_debug("couldn't open %s\n", filename);
442 return 0;
443 }
444
445 while (!readdir_r(tasks, &dirent, &next) && next) {
446 char *end;
447 pid_t _pid;
448
449 _pid = strtol(dirent.d_name, &end, 10);
450 if (*end)
451 continue;
452
453 rc = -1;
454 if (perf_event__prepare_comm(comm_event, _pid, machine,
455 &tgid, &ppid) != 0)
456 break;
457
458 if (perf_event__synthesize_fork(tool, fork_event, _pid, tgid,
459 ppid, process, machine) < 0)
460 break;
461 /*
462 * Send the prepared comm event
463 */
464 if (process(tool, comm_event, &synth_sample, machine) != 0)
465 break;
466
467 rc = 0;
468 if (_pid == pid) {
469 /* process the parent's maps too */
470 rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
471 process, machine, mmap_data, proc_map_timeout);
472 if (rc)
473 break;
474 }
475 }
476
477 closedir(tasks);
478 return rc;
479 }
480
481 int perf_event__synthesize_thread_map(struct perf_tool *tool,
482 struct thread_map *threads,
483 perf_event__handler_t process,
484 struct machine *machine,
485 bool mmap_data,
486 unsigned int proc_map_timeout)
487 {
488 union perf_event *comm_event, *mmap_event, *fork_event;
489 int err = -1, thread, j;
490
491 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
492 if (comm_event == NULL)
493 goto out;
494
495 mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size);
496 if (mmap_event == NULL)
497 goto out_free_comm;
498
499 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
500 if (fork_event == NULL)
501 goto out_free_mmap;
502
503 err = 0;
504 for (thread = 0; thread < threads->nr; ++thread) {
505 if (__event__synthesize_thread(comm_event, mmap_event,
506 fork_event,
507 thread_map__pid(threads, thread), 0,
508 process, tool, machine,
509 mmap_data, proc_map_timeout)) {
510 err = -1;
511 break;
512 }
513
514 /*
515 * comm.pid is set to thread group id by
516 * perf_event__synthesize_comm
517 */
518 if ((int) comm_event->comm.pid != thread_map__pid(threads, thread)) {
519 bool need_leader = true;
520
521 /* is thread group leader in thread_map? */
522 for (j = 0; j < threads->nr; ++j) {
523 if ((int) comm_event->comm.pid == thread_map__pid(threads, j)) {
524 need_leader = false;
525 break;
526 }
527 }
528
529 /* if not, generate events for it */
530 if (need_leader &&
531 __event__synthesize_thread(comm_event, mmap_event,
532 fork_event,
533 comm_event->comm.pid, 0,
534 process, tool, machine,
535 mmap_data, proc_map_timeout)) {
536 err = -1;
537 break;
538 }
539 }
540 }
541 free(fork_event);
542 out_free_mmap:
543 free(mmap_event);
544 out_free_comm:
545 free(comm_event);
546 out:
547 return err;
548 }
549
550 int perf_event__synthesize_threads(struct perf_tool *tool,
551 perf_event__handler_t process,
552 struct machine *machine,
553 bool mmap_data,
554 unsigned int proc_map_timeout)
555 {
556 DIR *proc;
557 char proc_path[PATH_MAX];
558 struct dirent dirent, *next;
559 union perf_event *comm_event, *mmap_event, *fork_event;
560 int err = -1;
561
562 if (machine__is_default_guest(machine))
563 return 0;
564
565 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
566 if (comm_event == NULL)
567 goto out;
568
569 mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size);
570 if (mmap_event == NULL)
571 goto out_free_comm;
572
573 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
574 if (fork_event == NULL)
575 goto out_free_mmap;
576
577 snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir);
578 proc = opendir(proc_path);
579
580 if (proc == NULL)
581 goto out_free_fork;
582
583 while (!readdir_r(proc, &dirent, &next) && next) {
584 char *end;
585 pid_t pid = strtol(dirent.d_name, &end, 10);
586
587 if (*end) /* only interested in proper numerical dirents */
588 continue;
589 /*
590 * We may race with exiting thread, so don't stop just because
591 * one thread couldn't be synthesized.
592 */
593 __event__synthesize_thread(comm_event, mmap_event, fork_event, pid,
594 1, process, tool, machine, mmap_data,
595 proc_map_timeout);
596 }
597
598 err = 0;
599 closedir(proc);
600 out_free_fork:
601 free(fork_event);
602 out_free_mmap:
603 free(mmap_event);
604 out_free_comm:
605 free(comm_event);
606 out:
607 return err;
608 }
609
610 struct process_symbol_args {
611 const char *name;
612 u64 start;
613 };
614
615 static int find_symbol_cb(void *arg, const char *name, char type,
616 u64 start)
617 {
618 struct process_symbol_args *args = arg;
619
620 /*
621 * Must be a function or at least an alias, as in PARISC64, where "_text" is
622 * an 'A' to the same address as "_stext".
623 */
624 if (!(symbol_type__is_a(type, MAP__FUNCTION) ||
625 type == 'A') || strcmp(name, args->name))
626 return 0;
627
628 args->start = start;
629 return 1;
630 }
631
632 u64 kallsyms__get_function_start(const char *kallsyms_filename,
633 const char *symbol_name)
634 {
635 struct process_symbol_args args = { .name = symbol_name, };
636
637 if (kallsyms__parse(kallsyms_filename, &args, find_symbol_cb) <= 0)
638 return 0;
639
640 return args.start;
641 }
642
643 int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
644 perf_event__handler_t process,
645 struct machine *machine)
646 {
647 size_t size;
648 const char *mmap_name;
649 char name_buff[PATH_MAX];
650 struct map *map;
651 struct kmap *kmap;
652 int err;
653 union perf_event *event;
654
655 if (machine->vmlinux_maps[0] == NULL)
656 return -1;
657
658 /*
659 * We should get this from /sys/kernel/sections/.text, but till that is
660 * available use this, and after it is use this as a fallback for older
661 * kernels.
662 */
663 event = zalloc((sizeof(event->mmap) + machine->id_hdr_size));
664 if (event == NULL) {
665 pr_debug("Not enough memory synthesizing mmap event "
666 "for kernel modules\n");
667 return -1;
668 }
669
670 mmap_name = machine__mmap_name(machine, name_buff, sizeof(name_buff));
671 if (machine__is_host(machine)) {
672 /*
673 * kernel uses PERF_RECORD_MISC_USER for user space maps,
674 * see kernel/perf_event.c __perf_event_mmap
675 */
676 event->header.misc = PERF_RECORD_MISC_KERNEL;
677 } else {
678 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
679 }
680
681 map = machine->vmlinux_maps[MAP__FUNCTION];
682 kmap = map__kmap(map);
683 size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
684 "%s%s", mmap_name, kmap->ref_reloc_sym->name) + 1;
685 size = PERF_ALIGN(size, sizeof(u64));
686 event->mmap.header.type = PERF_RECORD_MMAP;
687 event->mmap.header.size = (sizeof(event->mmap) -
688 (sizeof(event->mmap.filename) - size) + machine->id_hdr_size);
689 event->mmap.pgoff = kmap->ref_reloc_sym->addr;
690 event->mmap.start = map->start;
691 event->mmap.len = map->end - event->mmap.start;
692 event->mmap.pid = machine->pid;
693
694 err = process(tool, event, &synth_sample, machine);
695 free(event);
696
697 return err;
698 }
699
700 size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
701 {
702 const char *s;
703
704 if (event->header.misc & PERF_RECORD_MISC_COMM_EXEC)
705 s = " exec";
706 else
707 s = "";
708
709 return fprintf(fp, "%s: %s:%d/%d\n", s, event->comm.comm, event->comm.pid, event->comm.tid);
710 }
711
712 int perf_event__process_comm(struct perf_tool *tool __maybe_unused,
713 union perf_event *event,
714 struct perf_sample *sample,
715 struct machine *machine)
716 {
717 return machine__process_comm_event(machine, event, sample);
718 }
719
720 int perf_event__process_lost(struct perf_tool *tool __maybe_unused,
721 union perf_event *event,
722 struct perf_sample *sample,
723 struct machine *machine)
724 {
725 return machine__process_lost_event(machine, event, sample);
726 }
727
728 int perf_event__process_aux(struct perf_tool *tool __maybe_unused,
729 union perf_event *event,
730 struct perf_sample *sample __maybe_unused,
731 struct machine *machine)
732 {
733 return machine__process_aux_event(machine, event);
734 }
735
736 int perf_event__process_itrace_start(struct perf_tool *tool __maybe_unused,
737 union perf_event *event,
738 struct perf_sample *sample __maybe_unused,
739 struct machine *machine)
740 {
741 return machine__process_itrace_start_event(machine, event);
742 }
743
744 int perf_event__process_lost_samples(struct perf_tool *tool __maybe_unused,
745 union perf_event *event,
746 struct perf_sample *sample,
747 struct machine *machine)
748 {
749 return machine__process_lost_samples_event(machine, event, sample);
750 }
751
752 size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
753 {
754 return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %c %s\n",
755 event->mmap.pid, event->mmap.tid, event->mmap.start,
756 event->mmap.len, event->mmap.pgoff,
757 (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x',
758 event->mmap.filename);
759 }
760
761 size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp)
762 {
763 return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64
764 " %02x:%02x %"PRIu64" %"PRIu64"]: %c%c%c%c %s\n",
765 event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
766 event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj,
767 event->mmap2.min, event->mmap2.ino,
768 event->mmap2.ino_generation,
769 (event->mmap2.prot & PROT_READ) ? 'r' : '-',
770 (event->mmap2.prot & PROT_WRITE) ? 'w' : '-',
771 (event->mmap2.prot & PROT_EXEC) ? 'x' : '-',
772 (event->mmap2.flags & MAP_SHARED) ? 's' : 'p',
773 event->mmap2.filename);
774 }
775
776 int perf_event__process_mmap(struct perf_tool *tool __maybe_unused,
777 union perf_event *event,
778 struct perf_sample *sample,
779 struct machine *machine)
780 {
781 return machine__process_mmap_event(machine, event, sample);
782 }
783
784 int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused,
785 union perf_event *event,
786 struct perf_sample *sample,
787 struct machine *machine)
788 {
789 return machine__process_mmap2_event(machine, event, sample);
790 }
791
792 size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
793 {
794 return fprintf(fp, "(%d:%d):(%d:%d)\n",
795 event->fork.pid, event->fork.tid,
796 event->fork.ppid, event->fork.ptid);
797 }
798
799 int perf_event__process_fork(struct perf_tool *tool __maybe_unused,
800 union perf_event *event,
801 struct perf_sample *sample,
802 struct machine *machine)
803 {
804 return machine__process_fork_event(machine, event, sample);
805 }
806
807 int perf_event__process_exit(struct perf_tool *tool __maybe_unused,
808 union perf_event *event,
809 struct perf_sample *sample,
810 struct machine *machine)
811 {
812 return machine__process_exit_event(machine, event, sample);
813 }
814
815 size_t perf_event__fprintf_aux(union perf_event *event, FILE *fp)
816 {
817 return fprintf(fp, " offset: %#"PRIx64" size: %#"PRIx64" flags: %#"PRIx64" [%s%s]\n",
818 event->aux.aux_offset, event->aux.aux_size,
819 event->aux.flags,
820 event->aux.flags & PERF_AUX_FLAG_TRUNCATED ? "T" : "",
821 event->aux.flags & PERF_AUX_FLAG_OVERWRITE ? "O" : "");
822 }
823
824 size_t perf_event__fprintf_itrace_start(union perf_event *event, FILE *fp)
825 {
826 return fprintf(fp, " pid: %u tid: %u\n",
827 event->itrace_start.pid, event->itrace_start.tid);
828 }
829
830 size_t perf_event__fprintf(union perf_event *event, FILE *fp)
831 {
832 size_t ret = fprintf(fp, "PERF_RECORD_%s",
833 perf_event__name(event->header.type));
834
835 switch (event->header.type) {
836 case PERF_RECORD_COMM:
837 ret += perf_event__fprintf_comm(event, fp);
838 break;
839 case PERF_RECORD_FORK:
840 case PERF_RECORD_EXIT:
841 ret += perf_event__fprintf_task(event, fp);
842 break;
843 case PERF_RECORD_MMAP:
844 ret += perf_event__fprintf_mmap(event, fp);
845 break;
846 case PERF_RECORD_MMAP2:
847 ret += perf_event__fprintf_mmap2(event, fp);
848 break;
849 case PERF_RECORD_AUX:
850 ret += perf_event__fprintf_aux(event, fp);
851 break;
852 case PERF_RECORD_ITRACE_START:
853 ret += perf_event__fprintf_itrace_start(event, fp);
854 break;
855 default:
856 ret += fprintf(fp, "\n");
857 }
858
859 return ret;
860 }
861
862 int perf_event__process(struct perf_tool *tool __maybe_unused,
863 union perf_event *event,
864 struct perf_sample *sample,
865 struct machine *machine)
866 {
867 return machine__process_event(machine, event, sample);
868 }
869
870 void thread__find_addr_map(struct thread *thread, u8 cpumode,
871 enum map_type type, u64 addr,
872 struct addr_location *al)
873 {
874 struct map_groups *mg = thread->mg;
875 struct machine *machine = mg->machine;
876 bool load_map = false;
877
878 al->machine = machine;
879 al->thread = thread;
880 al->addr = addr;
881 al->cpumode = cpumode;
882 al->filtered = 0;
883
884 if (machine == NULL) {
885 al->map = NULL;
886 return;
887 }
888
889 if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
890 al->level = 'k';
891 mg = &machine->kmaps;
892 load_map = true;
893 } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
894 al->level = '.';
895 } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
896 al->level = 'g';
897 mg = &machine->kmaps;
898 load_map = true;
899 } else if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) {
900 al->level = 'u';
901 } else {
902 al->level = 'H';
903 al->map = NULL;
904
905 if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
906 cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
907 !perf_guest)
908 al->filtered |= (1 << HIST_FILTER__GUEST);
909 if ((cpumode == PERF_RECORD_MISC_USER ||
910 cpumode == PERF_RECORD_MISC_KERNEL) &&
911 !perf_host)
912 al->filtered |= (1 << HIST_FILTER__HOST);
913
914 return;
915 }
916 try_again:
917 al->map = map_groups__find(mg, type, al->addr);
918 if (al->map == NULL) {
919 /*
920 * If this is outside of all known maps, and is a negative
921 * address, try to look it up in the kernel dso, as it might be
922 * a vsyscall or vdso (which executes in user-mode).
923 *
924 * XXX This is nasty, we should have a symbol list in the
925 * "[vdso]" dso, but for now lets use the old trick of looking
926 * in the whole kernel symbol list.
927 */
928 if (cpumode == PERF_RECORD_MISC_USER && machine &&
929 mg != &machine->kmaps &&
930 machine__kernel_ip(machine, al->addr)) {
931 mg = &machine->kmaps;
932 load_map = true;
933 goto try_again;
934 }
935 } else {
936 /*
937 * Kernel maps might be changed when loading symbols so loading
938 * must be done prior to using kernel maps.
939 */
940 if (load_map)
941 map__load(al->map, machine->symbol_filter);
942 al->addr = al->map->map_ip(al->map, al->addr);
943 }
944 }
945
946 void thread__find_addr_location(struct thread *thread,
947 u8 cpumode, enum map_type type, u64 addr,
948 struct addr_location *al)
949 {
950 thread__find_addr_map(thread, cpumode, type, addr, al);
951 if (al->map != NULL)
952 al->sym = map__find_symbol(al->map, al->addr,
953 thread->mg->machine->symbol_filter);
954 else
955 al->sym = NULL;
956 }
957
958 /*
959 * Callers need to drop the reference to al->thread, obtained in
960 * machine__findnew_thread()
961 */
962 int perf_event__preprocess_sample(const union perf_event *event,
963 struct machine *machine,
964 struct addr_location *al,
965 struct perf_sample *sample)
966 {
967 u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
968 struct thread *thread = machine__findnew_thread(machine, sample->pid,
969 sample->tid);
970
971 if (thread == NULL)
972 return -1;
973
974 dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
975 /*
976 * Have we already created the kernel maps for this machine?
977 *
978 * This should have happened earlier, when we processed the kernel MMAP
979 * events, but for older perf.data files there was no such thing, so do
980 * it now.
981 */
982 if (cpumode == PERF_RECORD_MISC_KERNEL &&
983 machine->vmlinux_maps[MAP__FUNCTION] == NULL)
984 machine__create_kernel_maps(machine);
985
986 thread__find_addr_map(thread, cpumode, MAP__FUNCTION, sample->ip, al);
987 dump_printf(" ...... dso: %s\n",
988 al->map ? al->map->dso->long_name :
989 al->level == 'H' ? "[hypervisor]" : "<not found>");
990
991 if (thread__is_filtered(thread))
992 al->filtered |= (1 << HIST_FILTER__THREAD);
993
994 al->sym = NULL;
995 al->cpu = sample->cpu;
996
997 if (al->map) {
998 struct dso *dso = al->map->dso;
999
1000 if (symbol_conf.dso_list &&
1001 (!dso || !(strlist__has_entry(symbol_conf.dso_list,
1002 dso->short_name) ||
1003 (dso->short_name != dso->long_name &&
1004 strlist__has_entry(symbol_conf.dso_list,
1005 dso->long_name))))) {
1006 al->filtered |= (1 << HIST_FILTER__DSO);
1007 }
1008
1009 al->sym = map__find_symbol(al->map, al->addr,
1010 machine->symbol_filter);
1011 }
1012
1013 if (symbol_conf.sym_list &&
1014 (!al->sym || !strlist__has_entry(symbol_conf.sym_list,
1015 al->sym->name))) {
1016 al->filtered |= (1 << HIST_FILTER__SYMBOL);
1017 }
1018
1019 return 0;
1020 }
1021
1022 /*
1023 * The preprocess_sample method will return with reference counts for the
1024 * in it, when done using (and perhaps getting ref counts if needing to
1025 * keep a pointer to one of those entries) it must be paired with
1026 * addr_location__put(), so that the refcounts can be decremented.
1027 */
1028 void addr_location__put(struct addr_location *al)
1029 {
1030 thread__zput(al->thread);
1031 }
1032
1033 bool is_bts_event(struct perf_event_attr *attr)
1034 {
1035 return attr->type == PERF_TYPE_HARDWARE &&
1036 (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) &&
1037 attr->sample_period == 1;
1038 }
1039
1040 bool sample_addr_correlates_sym(struct perf_event_attr *attr)
1041 {
1042 if (attr->type == PERF_TYPE_SOFTWARE &&
1043 (attr->config == PERF_COUNT_SW_PAGE_FAULTS ||
1044 attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
1045 attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ))
1046 return true;
1047
1048 if (is_bts_event(attr))
1049 return true;
1050
1051 return false;
1052 }
1053
1054 void perf_event__preprocess_sample_addr(union perf_event *event,
1055 struct perf_sample *sample,
1056 struct thread *thread,
1057 struct addr_location *al)
1058 {
1059 u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
1060
1061 thread__find_addr_map(thread, cpumode, MAP__FUNCTION, sample->addr, al);
1062 if (!al->map)
1063 thread__find_addr_map(thread, cpumode, MAP__VARIABLE,
1064 sample->addr, al);
1065
1066 al->cpu = sample->cpu;
1067 al->sym = NULL;
1068
1069 if (al->map)
1070 al->sym = map__find_symbol(al->map, al->addr, NULL);
1071 }
Linux kernel - Deliverables
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