projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge branch 'for-linus-4.3' 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_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, n;
71 char *nl, *name, *tgids, *ppids;
72
73 *tgid = -1;
74 *ppid = -1;
75
76 snprintf(filename, sizeof(filename), "/proc/%d/status", pid);
77
78 fd = open(filename, O_RDONLY);
79 if (fd < 0) {
80 pr_debug("couldn't open %s\n", filename);
81 return -1;
82 }
83
84 n = read(fd, bf, sizeof(bf) - 1);
85 close(fd);
86 if (n <= 0) {
87 pr_warning("Couldn't get COMM, tigd and ppid for pid %d\n",
88 pid);
89 return -1;
90 }
91 bf[n] = '\0';
92
93 name = strstr(bf, "Name:");
94 tgids = strstr(bf, "Tgid:");
95 ppids = strstr(bf, "PPid:");
96
97 if (name) {
98 name += 5; /* strlen("Name:") */
99
100 while (*name && isspace(*name))
101 ++name;
102
103 nl = strchr(name, '\n');
104 if (nl)
105 *nl = '\0';
106
107 size = strlen(name);
108 if (size >= len)
109 size = len - 1;
110 memcpy(comm, name, size);
111 comm[size] = '\0';
112 } else {
113 pr_debug("Name: string not found for pid %d\n", pid);
114 }
115
116 if (tgids) {
117 tgids += 5; /* strlen("Tgid:") */
118 *tgid = atoi(tgids);
119 } else {
120 pr_debug("Tgid: string not found for pid %d\n", pid);
121 }
122
123 if (ppids) {
124 ppids += 5; /* strlen("PPid:") */
125 *ppid = atoi(ppids);
126 } else {
127 pr_debug("PPid: string not found for pid %d\n", pid);
128 }
129
130 return 0;
131 }
132
133 static int perf_event__prepare_comm(union perf_event *event, pid_t pid,
134 struct machine *machine,
135 pid_t *tgid, pid_t *ppid)
136 {
137 size_t size;
138
139 *ppid = -1;
140
141 memset(&event->comm, 0, sizeof(event->comm));
142
143 if (machine__is_host(machine)) {
144 if (perf_event__get_comm_ids(pid, event->comm.comm,
145 sizeof(event->comm.comm),
146 tgid, ppid) != 0) {
147 return -1;
148 }
149 } else {
150 *tgid = machine->pid;
151 }
152
153 if (*tgid < 0)
154 return -1;
155
156 event->comm.pid = *tgid;
157 event->comm.header.type = PERF_RECORD_COMM;
158
159 size = strlen(event->comm.comm) + 1;
160 size = PERF_ALIGN(size, sizeof(u64));
161 memset(event->comm.comm + size, 0, machine->id_hdr_size);
162 event->comm.header.size = (sizeof(event->comm) -
163 (sizeof(event->comm.comm) - size) +
164 machine->id_hdr_size);
165 event->comm.tid = pid;
166
167 return 0;
168 }
169
170 static pid_t perf_event__synthesize_comm(struct perf_tool *tool,
171 union perf_event *event, pid_t pid,
172 perf_event__handler_t process,
173 struct machine *machine)
174 {
175 pid_t tgid, ppid;
176
177 if (perf_event__prepare_comm(event, pid, machine, &tgid, &ppid) != 0)
178 return -1;
179
180 if (process(tool, event, &synth_sample, machine) != 0)
181 return -1;
182
183 return tgid;
184 }
185
186 static int perf_event__synthesize_fork(struct perf_tool *tool,
187 union perf_event *event,
188 pid_t pid, pid_t tgid, pid_t ppid,
189 perf_event__handler_t process,
190 struct machine *machine)
191 {
192 memset(&event->fork, 0, sizeof(event->fork) + machine->id_hdr_size);
193
194 /*
195 * for main thread set parent to ppid from status file. For other
196 * threads set parent pid to main thread. ie., assume main thread
197 * spawns all threads in a process
198 */
199 if (tgid == pid) {
200 event->fork.ppid = ppid;
201 event->fork.ptid = ppid;
202 } else {
203 event->fork.ppid = tgid;
204 event->fork.ptid = tgid;
205 }
206 event->fork.pid = tgid;
207 event->fork.tid = pid;
208 event->fork.header.type = PERF_RECORD_FORK;
209
210 event->fork.header.size = (sizeof(event->fork) + machine->id_hdr_size);
211
212 if (process(tool, event, &synth_sample, machine) != 0)
213 return -1;
214
215 return 0;
216 }
217
218 int perf_event__synthesize_mmap_events(struct perf_tool *tool,
219 union perf_event *event,
220 pid_t pid, pid_t tgid,
221 perf_event__handler_t process,
222 struct machine *machine,
223 bool mmap_data,
224 unsigned int proc_map_timeout)
225 {
226 char filename[PATH_MAX];
227 FILE *fp;
228 unsigned long long t;
229 bool truncation = false;
230 unsigned long long timeout = proc_map_timeout * 1000000ULL;
231 int rc = 0;
232
233 if (machine__is_default_guest(machine))
234 return 0;
235
236 snprintf(filename, sizeof(filename), "%s/proc/%d/maps",
237 machine->root_dir, pid);
238
239 fp = fopen(filename, "r");
240 if (fp == NULL) {
241 /*
242 * We raced with a task exiting - just return:
243 */
244 pr_debug("couldn't open %s\n", filename);
245 return -1;
246 }
247
248 event->header.type = PERF_RECORD_MMAP2;
249 t = rdclock();
250
251 while (1) {
252 char bf[BUFSIZ];
253 char prot[5];
254 char execname[PATH_MAX];
255 char anonstr[] = "//anon";
256 unsigned int ino;
257 size_t size;
258 ssize_t n;
259
260 if (fgets(bf, sizeof(bf), fp) == NULL)
261 break;
262
263 if ((rdclock() - t) > timeout) {
264 pr_warning("Reading %s time out. "
265 "You may want to increase "
266 "the time limit by --proc-map-timeout\n",
267 filename);
268 truncation = true;
269 goto out;
270 }
271
272 /* ensure null termination since stack will be reused. */
273 strcpy(execname, "");
274
275 /* 00400000-0040c000 r-xp 00000000 fd:01 41038 /bin/cat */
276 n = sscanf(bf, "%"PRIx64"-%"PRIx64" %s %"PRIx64" %x:%x %u %s\n",
277 &event->mmap2.start, &event->mmap2.len, prot,
278 &event->mmap2.pgoff, &event->mmap2.maj,
279 &event->mmap2.min,
280 &ino, execname);
281
282 /*
283 * Anon maps don't have the execname.
284 */
285 if (n < 7)
286 continue;
287
288 event->mmap2.ino = (u64)ino;
289
290 /*
291 * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
292 */
293 if (machine__is_host(machine))
294 event->header.misc = PERF_RECORD_MISC_USER;
295 else
296 event->header.misc = PERF_RECORD_MISC_GUEST_USER;
297
298 /* map protection and flags bits */
299 event->mmap2.prot = 0;
300 event->mmap2.flags = 0;
301 if (prot[0] == 'r')
302 event->mmap2.prot |= PROT_READ;
303 if (prot[1] == 'w')
304 event->mmap2.prot |= PROT_WRITE;
305 if (prot[2] == 'x')
306 event->mmap2.prot |= PROT_EXEC;
307
308 if (prot[3] == 's')
309 event->mmap2.flags |= MAP_SHARED;
310 else
311 event->mmap2.flags |= MAP_PRIVATE;
312
313 if (prot[2] != 'x') {
314 if (!mmap_data || prot[0] != 'r')
315 continue;
316
317 event->header.misc |= PERF_RECORD_MISC_MMAP_DATA;
318 }
319
320 out:
321 if (truncation)
322 event->header.misc |= PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT;
323
324 if (!strcmp(execname, ""))
325 strcpy(execname, anonstr);
326
327 size = strlen(execname) + 1;
328 memcpy(event->mmap2.filename, execname, size);
329 size = PERF_ALIGN(size, sizeof(u64));
330 event->mmap2.len -= event->mmap.start;
331 event->mmap2.header.size = (sizeof(event->mmap2) -
332 (sizeof(event->mmap2.filename) - size));
333 memset(event->mmap2.filename + size, 0, machine->id_hdr_size);
334 event->mmap2.header.size += machine->id_hdr_size;
335 event->mmap2.pid = tgid;
336 event->mmap2.tid = pid;
337
338 if (process(tool, event, &synth_sample, machine) != 0) {
339 rc = -1;
340 break;
341 }
342
343 if (truncation)
344 break;
345 }
346
347 fclose(fp);
348 return rc;
349 }
350
351 int perf_event__synthesize_modules(struct perf_tool *tool,
352 perf_event__handler_t process,
353 struct machine *machine)
354 {
355 int rc = 0;
356 struct map *pos;
357 struct map_groups *kmaps = &machine->kmaps;
358 struct maps *maps = &kmaps->maps[MAP__FUNCTION];
359 union perf_event *event = zalloc((sizeof(event->mmap) +
360 machine->id_hdr_size));
361 if (event == NULL) {
362 pr_debug("Not enough memory synthesizing mmap event "
363 "for kernel modules\n");
364 return -1;
365 }
366
367 event->header.type = PERF_RECORD_MMAP;
368
369 /*
370 * kernel uses 0 for user space maps, see kernel/perf_event.c
371 * __perf_event_mmap
372 */
373 if (machine__is_host(machine))
374 event->header.misc = PERF_RECORD_MISC_KERNEL;
375 else
376 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
377
378 for (pos = maps__first(maps); pos; pos = map__next(pos)) {
379 size_t size;
380
381 if (pos->dso->kernel)
382 continue;
383
384 size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
385 event->mmap.header.type = PERF_RECORD_MMAP;
386 event->mmap.header.size = (sizeof(event->mmap) -
387 (sizeof(event->mmap.filename) - size));
388 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
389 event->mmap.header.size += machine->id_hdr_size;
390 event->mmap.start = pos->start;
391 event->mmap.len = pos->end - pos->start;
392 event->mmap.pid = machine->pid;
393
394 memcpy(event->mmap.filename, pos->dso->long_name,
395 pos->dso->long_name_len + 1);
396 if (process(tool, event, &synth_sample, machine) != 0) {
397 rc = -1;
398 break;
399 }
400 }
401
402 free(event);
403 return rc;
404 }
405
406 static int __event__synthesize_thread(union perf_event *comm_event,
407 union perf_event *mmap_event,
408 union perf_event *fork_event,
409 pid_t pid, int full,
410 perf_event__handler_t process,
411 struct perf_tool *tool,
412 struct machine *machine,
413 bool mmap_data,
414 unsigned int proc_map_timeout)
415 {
416 char filename[PATH_MAX];
417 DIR *tasks;
418 struct dirent dirent, *next;
419 pid_t tgid, ppid;
420 int rc = 0;
421
422 /* special case: only send one comm event using passed in pid */
423 if (!full) {
424 tgid = perf_event__synthesize_comm(tool, comm_event, pid,
425 process, machine);
426
427 if (tgid == -1)
428 return -1;
429
430 return perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
431 process, machine, mmap_data,
432 proc_map_timeout);
433 }
434
435 if (machine__is_default_guest(machine))
436 return 0;
437
438 snprintf(filename, sizeof(filename), "%s/proc/%d/task",
439 machine->root_dir, pid);
440
441 tasks = opendir(filename);
442 if (tasks == NULL) {
443 pr_debug("couldn't open %s\n", filename);
444 return 0;
445 }
446
447 while (!readdir_r(tasks, &dirent, &next) && next) {
448 char *end;
449 pid_t _pid;
450
451 _pid = strtol(dirent.d_name, &end, 10);
452 if (*end)
453 continue;
454
455 rc = -1;
456 if (perf_event__prepare_comm(comm_event, _pid, machine,
457 &tgid, &ppid) != 0)
458 break;
459
460 if (perf_event__synthesize_fork(tool, fork_event, _pid, tgid,
461 ppid, process, machine) < 0)
462 break;
463 /*
464 * Send the prepared comm event
465 */
466 if (process(tool, comm_event, &synth_sample, machine) != 0)
467 break;
468
469 rc = 0;
470 if (_pid == pid) {
471 /* process the parent's maps too */
472 rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
473 process, machine, mmap_data, proc_map_timeout);
474 if (rc)
475 break;
476 }
477 }
478
479 closedir(tasks);
480 return rc;
481 }
482
483 int perf_event__synthesize_thread_map(struct perf_tool *tool,
484 struct thread_map *threads,
485 perf_event__handler_t process,
486 struct machine *machine,
487 bool mmap_data,
488 unsigned int proc_map_timeout)
489 {
490 union perf_event *comm_event, *mmap_event, *fork_event;
491 int err = -1, thread, j;
492
493 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
494 if (comm_event == NULL)
495 goto out;
496
497 mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size);
498 if (mmap_event == NULL)
499 goto out_free_comm;
500
501 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
502 if (fork_event == NULL)
503 goto out_free_mmap;
504
505 err = 0;
506 for (thread = 0; thread < threads->nr; ++thread) {
507 if (__event__synthesize_thread(comm_event, mmap_event,
508 fork_event,
509 thread_map__pid(threads, thread), 0,
510 process, tool, machine,
511 mmap_data, proc_map_timeout)) {
512 err = -1;
513 break;
514 }
515
516 /*
517 * comm.pid is set to thread group id by
518 * perf_event__synthesize_comm
519 */
520 if ((int) comm_event->comm.pid != thread_map__pid(threads, thread)) {
521 bool need_leader = true;
522
523 /* is thread group leader in thread_map? */
524 for (j = 0; j < threads->nr; ++j) {
525 if ((int) comm_event->comm.pid == thread_map__pid(threads, j)) {
526 need_leader = false;
527 break;
528 }
529 }
530
531 /* if not, generate events for it */
532 if (need_leader &&
533 __event__synthesize_thread(comm_event, mmap_event,
534 fork_event,
535 comm_event->comm.pid, 0,
536 process, tool, machine,
537 mmap_data, proc_map_timeout)) {
538 err = -1;
539 break;
540 }
541 }
542 }
543 free(fork_event);
544 out_free_mmap:
545 free(mmap_event);
546 out_free_comm:
547 free(comm_event);
548 out:
549 return err;
550 }
551
552 int perf_event__synthesize_threads(struct perf_tool *tool,
553 perf_event__handler_t process,
554 struct machine *machine,
555 bool mmap_data,
556 unsigned int proc_map_timeout)
557 {
558 DIR *proc;
559 char proc_path[PATH_MAX];
560 struct dirent dirent, *next;
561 union perf_event *comm_event, *mmap_event, *fork_event;
562 int err = -1;
563
564 if (machine__is_default_guest(machine))
565 return 0;
566
567 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
568 if (comm_event == NULL)
569 goto out;
570
571 mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size);
572 if (mmap_event == NULL)
573 goto out_free_comm;
574
575 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
576 if (fork_event == NULL)
577 goto out_free_mmap;
578
579 snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir);
580 proc = opendir(proc_path);
581
582 if (proc == NULL)
583 goto out_free_fork;
584
585 while (!readdir_r(proc, &dirent, &next) && next) {
586 char *end;
587 pid_t pid = strtol(dirent.d_name, &end, 10);
588
589 if (*end) /* only interested in proper numerical dirents */
590 continue;
591 /*
592 * We may race with exiting thread, so don't stop just because
593 * one thread couldn't be synthesized.
594 */
595 __event__synthesize_thread(comm_event, mmap_event, fork_event, pid,
596 1, process, tool, machine, mmap_data,
597 proc_map_timeout);
598 }
599
600 err = 0;
601 closedir(proc);
602 out_free_fork:
603 free(fork_event);
604 out_free_mmap:
605 free(mmap_event);
606 out_free_comm:
607 free(comm_event);
608 out:
609 return err;
610 }
611
612 struct process_symbol_args {
613 const char *name;
614 u64 start;
615 };
616
617 static int find_symbol_cb(void *arg, const char *name, char type,
618 u64 start)
619 {
620 struct process_symbol_args *args = arg;
621
622 /*
623 * Must be a function or at least an alias, as in PARISC64, where "_text" is
624 * an 'A' to the same address as "_stext".
625 */
626 if (!(symbol_type__is_a(type, MAP__FUNCTION) ||
627 type == 'A') || strcmp(name, args->name))
628 return 0;
629
630 args->start = start;
631 return 1;
632 }
633
634 u64 kallsyms__get_function_start(const char *kallsyms_filename,
635 const char *symbol_name)
636 {
637 struct process_symbol_args args = { .name = symbol_name, };
638
639 if (kallsyms__parse(kallsyms_filename, &args, find_symbol_cb) <= 0)
640 return 0;
641
642 return args.start;
643 }
644
645 int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
646 perf_event__handler_t process,
647 struct machine *machine)
648 {
649 size_t size;
650 const char *mmap_name;
651 char name_buff[PATH_MAX];
652 struct map *map;
653 struct kmap *kmap;
654 int err;
655 union perf_event *event;
656
657 if (machine->vmlinux_maps[0] == NULL)
658 return -1;
659
660 /*
661 * We should get this from /sys/kernel/sections/.text, but till that is
662 * available use this, and after it is use this as a fallback for older
663 * kernels.
664 */
665 event = zalloc((sizeof(event->mmap) + machine->id_hdr_size));
666 if (event == NULL) {
667 pr_debug("Not enough memory synthesizing mmap event "
668 "for kernel modules\n");
669 return -1;
670 }
671
672 mmap_name = machine__mmap_name(machine, name_buff, sizeof(name_buff));
673 if (machine__is_host(machine)) {
674 /*
675 * kernel uses PERF_RECORD_MISC_USER for user space maps,
676 * see kernel/perf_event.c __perf_event_mmap
677 */
678 event->header.misc = PERF_RECORD_MISC_KERNEL;
679 } else {
680 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
681 }
682
683 map = machine->vmlinux_maps[MAP__FUNCTION];
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->vmlinux_maps[MAP__FUNCTION] == 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
1025 if (al->map) {
1026 struct dso *dso = al->map->dso;
1027
1028 if (symbol_conf.dso_list &&
1029 (!dso || !(strlist__has_entry(symbol_conf.dso_list,
1030 dso->short_name) ||
1031 (dso->short_name != dso->long_name &&
1032 strlist__has_entry(symbol_conf.dso_list,
1033 dso->long_name))))) {
1034 al->filtered |= (1 << HIST_FILTER__DSO);
1035 }
1036
1037 al->sym = map__find_symbol(al->map, al->addr,
1038 machine->symbol_filter);
1039 }
1040
1041 if (symbol_conf.sym_list &&
1042 (!al->sym || !strlist__has_entry(symbol_conf.sym_list,
1043 al->sym->name))) {
1044 al->filtered |= (1 << HIST_FILTER__SYMBOL);
1045 }
1046
1047 return 0;
1048 }
1049
1050 /*
1051 * The preprocess_sample method will return with reference counts for the
1052 * in it, when done using (and perhaps getting ref counts if needing to
1053 * keep a pointer to one of those entries) it must be paired with
1054 * addr_location__put(), so that the refcounts can be decremented.
1055 */
1056 void addr_location__put(struct addr_location *al)
1057 {
1058 thread__zput(al->thread);
1059 }
1060
1061 bool is_bts_event(struct perf_event_attr *attr)
1062 {
1063 return attr->type == PERF_TYPE_HARDWARE &&
1064 (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) &&
1065 attr->sample_period == 1;
1066 }
1067
1068 bool sample_addr_correlates_sym(struct perf_event_attr *attr)
1069 {
1070 if (attr->type == PERF_TYPE_SOFTWARE &&
1071 (attr->config == PERF_COUNT_SW_PAGE_FAULTS ||
1072 attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
1073 attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ))
1074 return true;
1075
1076 if (is_bts_event(attr))
1077 return true;
1078
1079 return false;
1080 }
1081
1082 void perf_event__preprocess_sample_addr(union perf_event *event,
1083 struct perf_sample *sample,
1084 struct thread *thread,
1085 struct addr_location *al)
1086 {
1087 u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
1088
1089 thread__find_addr_map(thread, cpumode, MAP__FUNCTION, sample->addr, al);
1090 if (!al->map)
1091 thread__find_addr_map(thread, cpumode, MAP__VARIABLE,
1092 sample->addr, al);
1093
1094 al->cpu = sample->cpu;
1095 al->sym = NULL;
1096
1097 if (al->map)
1098 al->sym = map__find_symbol(al->map, al->addr, NULL);
1099 }
Linux kernel - Deliverables
This page took 0.067514 seconds and 6 git commands to generate.