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