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1#include <linux/types.h>
2#include "event.h"
3#include "debug.h"
4#include "hist.h"
5#include "machine.h"
6#include "sort.h"
7#include "string.h"
8#include "strlist.h"
9#include "thread.h"
10#include "thread_map.h"
11#include "symbol/kallsyms.h"
12
13static const char *perf_event__names[] = {
14 [0] = "TOTAL",
15 [PERF_RECORD_MMAP] = "MMAP",
16 [PERF_RECORD_MMAP2] = "MMAP2",
17 [PERF_RECORD_LOST] = "LOST",
18 [PERF_RECORD_COMM] = "COMM",
19 [PERF_RECORD_EXIT] = "EXIT",
20 [PERF_RECORD_THROTTLE] = "THROTTLE",
21 [PERF_RECORD_UNTHROTTLE] = "UNTHROTTLE",
22 [PERF_RECORD_FORK] = "FORK",
23 [PERF_RECORD_READ] = "READ",
24 [PERF_RECORD_SAMPLE] = "SAMPLE",
25 [PERF_RECORD_HEADER_ATTR] = "ATTR",
26 [PERF_RECORD_HEADER_EVENT_TYPE] = "EVENT_TYPE",
27 [PERF_RECORD_HEADER_TRACING_DATA] = "TRACING_DATA",
28 [PERF_RECORD_HEADER_BUILD_ID] = "BUILD_ID",
29 [PERF_RECORD_FINISHED_ROUND] = "FINISHED_ROUND",
30};
31
32const char *perf_event__name(unsigned int id)
33{
34 if (id >= ARRAY_SIZE(perf_event__names))
35 return "INVALID";
36 if (!perf_event__names[id])
37 return "UNKNOWN";
38 return perf_event__names[id];
39}
40
41static struct perf_sample synth_sample = {
42 .pid = -1,
43 .tid = -1,
44 .time = -1,
45 .stream_id = -1,
46 .cpu = -1,
47 .period = 1,
48};
49
50static pid_t perf_event__get_comm_tgid(pid_t pid, char *comm, size_t len)
51{
52 char filename[PATH_MAX];
53 char bf[BUFSIZ];
54 FILE *fp;
55 size_t size = 0;
56 pid_t tgid = -1;
57
58 snprintf(filename, sizeof(filename), "/proc/%d/status", pid);
59
60 fp = fopen(filename, "r");
61 if (fp == NULL) {
62 pr_debug("couldn't open %s\n", filename);
63 return 0;
64 }
65
66 while (!comm[0] || (tgid < 0)) {
67 if (fgets(bf, sizeof(bf), fp) == NULL) {
68 pr_warning("couldn't get COMM and pgid, malformed %s\n",
69 filename);
70 break;
71 }
72
73 if (memcmp(bf, "Name:", 5) == 0) {
74 char *name = bf + 5;
75 while (*name && isspace(*name))
76 ++name;
77 size = strlen(name) - 1;
78 if (size >= len)
79 size = len - 1;
80 memcpy(comm, name, size);
81 comm[size] = '\0';
82
83 } else if (memcmp(bf, "Tgid:", 5) == 0) {
84 char *tgids = bf + 5;
85 while (*tgids && isspace(*tgids))
86 ++tgids;
87 tgid = atoi(tgids);
88 }
89 }
90
91 fclose(fp);
92
93 return tgid;
94}
95
96static pid_t perf_event__synthesize_comm(struct perf_tool *tool,
97 union perf_event *event, pid_t pid,
98 perf_event__handler_t process,
99 struct machine *machine)
100{
101 size_t size;
102 pid_t tgid;
103
104 memset(&event->comm, 0, sizeof(event->comm));
105
106 if (machine__is_host(machine))
107 tgid = perf_event__get_comm_tgid(pid, event->comm.comm,
108 sizeof(event->comm.comm));
109 else
110 tgid = machine->pid;
111
112 if (tgid < 0)
113 goto out;
114
115 event->comm.pid = tgid;
116 event->comm.header.type = PERF_RECORD_COMM;
117
118 size = strlen(event->comm.comm) + 1;
119 size = PERF_ALIGN(size, sizeof(u64));
120 memset(event->comm.comm + size, 0, machine->id_hdr_size);
121 event->comm.header.size = (sizeof(event->comm) -
122 (sizeof(event->comm.comm) - size) +
123 machine->id_hdr_size);
124 event->comm.tid = pid;
125
126 if (process(tool, event, &synth_sample, machine) != 0)
127 return -1;
128
129out:
130 return tgid;
131}
132
133static int perf_event__synthesize_fork(struct perf_tool *tool,
134 union perf_event *event, pid_t pid,
135 pid_t tgid, perf_event__handler_t process,
136 struct machine *machine)
137{
138 memset(&event->fork, 0, sizeof(event->fork) + machine->id_hdr_size);
139
140 /* this is really a clone event but we use fork to synthesize it */
141 event->fork.ppid = tgid;
142 event->fork.ptid = tgid;
143 event->fork.pid = tgid;
144 event->fork.tid = pid;
145 event->fork.header.type = PERF_RECORD_FORK;
146
147 event->fork.header.size = (sizeof(event->fork) + machine->id_hdr_size);
148
149 if (process(tool, event, &synth_sample, machine) != 0)
150 return -1;
151
152 return 0;
153}
154
155int perf_event__synthesize_mmap_events(struct perf_tool *tool,
156 union perf_event *event,
157 pid_t pid, pid_t tgid,
158 perf_event__handler_t process,
159 struct machine *machine,
160 bool mmap_data)
161{
162 char filename[PATH_MAX];
163 FILE *fp;
164 int rc = 0;
165
166 if (machine__is_default_guest(machine))
167 return 0;
168
169 snprintf(filename, sizeof(filename), "%s/proc/%d/maps",
170 machine->root_dir, pid);
171
172 fp = fopen(filename, "r");
173 if (fp == NULL) {
174 /*
175 * We raced with a task exiting - just return:
176 */
177 pr_debug("couldn't open %s\n", filename);
178 return -1;
179 }
180
181 event->header.type = PERF_RECORD_MMAP;
182
183 while (1) {
184 char bf[BUFSIZ];
185 char prot[5];
186 char execname[PATH_MAX];
187 char anonstr[] = "//anon";
188 size_t size;
189 ssize_t n;
190
191 if (fgets(bf, sizeof(bf), fp) == NULL)
192 break;
193
194 /* ensure null termination since stack will be reused. */
195 strcpy(execname, "");
196
197 /* 00400000-0040c000 r-xp 00000000 fd:01 41038 /bin/cat */
198 n = sscanf(bf, "%"PRIx64"-%"PRIx64" %s %"PRIx64" %*x:%*x %*u %s\n",
199 &event->mmap.start, &event->mmap.len, prot,
200 &event->mmap.pgoff,
201 execname);
202 /*
203 * Anon maps don't have the execname.
204 */
205 if (n < 4)
206 continue;
207 /*
208 * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
209 */
210 if (machine__is_host(machine))
211 event->header.misc = PERF_RECORD_MISC_USER;
212 else
213 event->header.misc = PERF_RECORD_MISC_GUEST_USER;
214
215 if (prot[2] != 'x') {
216 if (!mmap_data || prot[0] != 'r')
217 continue;
218
219 event->header.misc |= PERF_RECORD_MISC_MMAP_DATA;
220 }
221
222 if (!strcmp(execname, ""))
223 strcpy(execname, anonstr);
224
225 size = strlen(execname) + 1;
226 memcpy(event->mmap.filename, execname, size);
227 size = PERF_ALIGN(size, sizeof(u64));
228 event->mmap.len -= event->mmap.start;
229 event->mmap.header.size = (sizeof(event->mmap) -
230 (sizeof(event->mmap.filename) - size));
231 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
232 event->mmap.header.size += machine->id_hdr_size;
233 event->mmap.pid = tgid;
234 event->mmap.tid = pid;
235
236 if (process(tool, event, &synth_sample, machine) != 0) {
237 rc = -1;
238 break;
239 }
240 }
241
242 fclose(fp);
243 return rc;
244}
245
246int perf_event__synthesize_modules(struct perf_tool *tool,
247 perf_event__handler_t process,
248 struct machine *machine)
249{
250 int rc = 0;
251 struct rb_node *nd;
252 struct map_groups *kmaps = &machine->kmaps;
253 union perf_event *event = zalloc((sizeof(event->mmap) +
254 machine->id_hdr_size));
255 if (event == NULL) {
256 pr_debug("Not enough memory synthesizing mmap event "
257 "for kernel modules\n");
258 return -1;
259 }
260
261 event->header.type = PERF_RECORD_MMAP;
262
263 /*
264 * kernel uses 0 for user space maps, see kernel/perf_event.c
265 * __perf_event_mmap
266 */
267 if (machine__is_host(machine))
268 event->header.misc = PERF_RECORD_MISC_KERNEL;
269 else
270 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
271
272 for (nd = rb_first(&kmaps->maps[MAP__FUNCTION]);
273 nd; nd = rb_next(nd)) {
274 size_t size;
275 struct map *pos = rb_entry(nd, struct map, rb_node);
276
277 if (pos->dso->kernel)
278 continue;
279
280 size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
281 event->mmap.header.type = PERF_RECORD_MMAP;
282 event->mmap.header.size = (sizeof(event->mmap) -
283 (sizeof(event->mmap.filename) - size));
284 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
285 event->mmap.header.size += machine->id_hdr_size;
286 event->mmap.start = pos->start;
287 event->mmap.len = pos->end - pos->start;
288 event->mmap.pid = machine->pid;
289
290 memcpy(event->mmap.filename, pos->dso->long_name,
291 pos->dso->long_name_len + 1);
292 if (process(tool, event, &synth_sample, machine) != 0) {
293 rc = -1;
294 break;
295 }
296 }
297
298 free(event);
299 return rc;
300}
301
302static int __event__synthesize_thread(union perf_event *comm_event,
303 union perf_event *mmap_event,
304 union perf_event *fork_event,
305 pid_t pid, int full,
306 perf_event__handler_t process,
307 struct perf_tool *tool,
308 struct machine *machine, bool mmap_data)
309{
310 char filename[PATH_MAX];
311 DIR *tasks;
312 struct dirent dirent, *next;
313 pid_t tgid;
314
315 /* special case: only send one comm event using passed in pid */
316 if (!full) {
317 tgid = perf_event__synthesize_comm(tool, comm_event, pid,
318 process, machine);
319
320 if (tgid == -1)
321 return -1;
322
323 return perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
324 process, machine, mmap_data);
325 }
326
327 if (machine__is_default_guest(machine))
328 return 0;
329
330 snprintf(filename, sizeof(filename), "%s/proc/%d/task",
331 machine->root_dir, pid);
332
333 tasks = opendir(filename);
334 if (tasks == NULL) {
335 pr_debug("couldn't open %s\n", filename);
336 return 0;
337 }
338
339 while (!readdir_r(tasks, &dirent, &next) && next) {
340 char *end;
341 int rc = 0;
342 pid_t _pid;
343
344 _pid = strtol(dirent.d_name, &end, 10);
345 if (*end)
346 continue;
347
348 tgid = perf_event__synthesize_comm(tool, comm_event, _pid,
349 process, machine);
350 if (tgid == -1)
351 return -1;
352
353 if (_pid == pid) {
354 /* process the parent's maps too */
355 rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
356 process, machine, mmap_data);
357 } else {
358 /* only fork the tid's map, to save time */
359 rc = perf_event__synthesize_fork(tool, fork_event, _pid, tgid,
360 process, machine);
361 }
362
363 if (rc)
364 return rc;
365 }
366
367 closedir(tasks);
368 return 0;
369}
370
371int perf_event__synthesize_thread_map(struct perf_tool *tool,
372 struct thread_map *threads,
373 perf_event__handler_t process,
374 struct machine *machine,
375 bool mmap_data)
376{
377 union perf_event *comm_event, *mmap_event, *fork_event;
378 int err = -1, thread, j;
379
380 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
381 if (comm_event == NULL)
382 goto out;
383
384 mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size);
385 if (mmap_event == NULL)
386 goto out_free_comm;
387
388 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
389 if (fork_event == NULL)
390 goto out_free_mmap;
391
392 err = 0;
393 for (thread = 0; thread < threads->nr; ++thread) {
394 if (__event__synthesize_thread(comm_event, mmap_event,
395 fork_event,
396 threads->map[thread], 0,
397 process, tool, machine,
398 mmap_data)) {
399 err = -1;
400 break;
401 }
402
403 /*
404 * comm.pid is set to thread group id by
405 * perf_event__synthesize_comm
406 */
407 if ((int) comm_event->comm.pid != threads->map[thread]) {
408 bool need_leader = true;
409
410 /* is thread group leader in thread_map? */
411 for (j = 0; j < threads->nr; ++j) {
412 if ((int) comm_event->comm.pid == threads->map[j]) {
413 need_leader = false;
414 break;
415 }
416 }
417
418 /* if not, generate events for it */
419 if (need_leader &&
420 __event__synthesize_thread(comm_event, mmap_event,
421 fork_event,
422 comm_event->comm.pid, 0,
423 process, tool, machine,
424 mmap_data)) {
425 err = -1;
426 break;
427 }
428 }
429 }
430 free(fork_event);
431out_free_mmap:
432 free(mmap_event);
433out_free_comm:
434 free(comm_event);
435out:
436 return err;
437}
438
439int perf_event__synthesize_threads(struct perf_tool *tool,
440 perf_event__handler_t process,
441 struct machine *machine, bool mmap_data)
442{
443 DIR *proc;
444 char proc_path[PATH_MAX];
445 struct dirent dirent, *next;
446 union perf_event *comm_event, *mmap_event, *fork_event;
447 int err = -1;
448
449 if (machine__is_default_guest(machine))
450 return 0;
451
452 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
453 if (comm_event == NULL)
454 goto out;
455
456 mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size);
457 if (mmap_event == NULL)
458 goto out_free_comm;
459
460 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
461 if (fork_event == NULL)
462 goto out_free_mmap;
463
464 snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir);
465 proc = opendir(proc_path);
466
467 if (proc == NULL)
468 goto out_free_fork;
469
470 while (!readdir_r(proc, &dirent, &next) && next) {
471 char *end;
472 pid_t pid = strtol(dirent.d_name, &end, 10);
473
474 if (*end) /* only interested in proper numerical dirents */
475 continue;
476 /*
477 * We may race with exiting thread, so don't stop just because
478 * one thread couldn't be synthesized.
479 */
480 __event__synthesize_thread(comm_event, mmap_event, fork_event, pid,
481 1, process, tool, machine, mmap_data);
482 }
483
484 err = 0;
485 closedir(proc);
486out_free_fork:
487 free(fork_event);
488out_free_mmap:
489 free(mmap_event);
490out_free_comm:
491 free(comm_event);
492out:
493 return err;
494}
495
496struct process_symbol_args {
497 const char *name;
498 u64 start;
499};
500
501static int find_symbol_cb(void *arg, const char *name, char type,
502 u64 start)
503{
504 struct process_symbol_args *args = arg;
505
506 /*
507 * Must be a function or at least an alias, as in PARISC64, where "_text" is
508 * an 'A' to the same address as "_stext".
509 */
510 if (!(symbol_type__is_a(type, MAP__FUNCTION) ||
511 type == 'A') || strcmp(name, args->name))
512 return 0;
513
514 args->start = start;
515 return 1;
516}
517
518u64 kallsyms__get_function_start(const char *kallsyms_filename,
519 const char *symbol_name)
520{
521 struct process_symbol_args args = { .name = symbol_name, };
522
523 if (kallsyms__parse(kallsyms_filename, &args, find_symbol_cb) <= 0)
524 return 0;
525
526 return args.start;
527}
528
529int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
530 perf_event__handler_t process,
531 struct machine *machine)
532{
533 size_t size;
534 const char *mmap_name;
535 char name_buff[PATH_MAX];
536 struct map *map;
537 struct kmap *kmap;
538 int err;
539 /*
540 * We should get this from /sys/kernel/sections/.text, but till that is
541 * available use this, and after it is use this as a fallback for older
542 * kernels.
543 */
544 union perf_event *event = zalloc((sizeof(event->mmap) +
545 machine->id_hdr_size));
546 if (event == NULL) {
547 pr_debug("Not enough memory synthesizing mmap event "
548 "for kernel modules\n");
549 return -1;
550 }
551
552 mmap_name = machine__mmap_name(machine, name_buff, sizeof(name_buff));
553 if (machine__is_host(machine)) {
554 /*
555 * kernel uses PERF_RECORD_MISC_USER for user space maps,
556 * see kernel/perf_event.c __perf_event_mmap
557 */
558 event->header.misc = PERF_RECORD_MISC_KERNEL;
559 } else {
560 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
561 }
562
563 map = machine->vmlinux_maps[MAP__FUNCTION];
564 kmap = map__kmap(map);
565 size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
566 "%s%s", mmap_name, kmap->ref_reloc_sym->name) + 1;
567 size = PERF_ALIGN(size, sizeof(u64));
568 event->mmap.header.type = PERF_RECORD_MMAP;
569 event->mmap.header.size = (sizeof(event->mmap) -
570 (sizeof(event->mmap.filename) - size) + machine->id_hdr_size);
571 event->mmap.pgoff = kmap->ref_reloc_sym->addr;
572 event->mmap.start = map->start;
573 event->mmap.len = map->end - event->mmap.start;
574 event->mmap.pid = machine->pid;
575
576 err = process(tool, event, &synth_sample, machine);
577 free(event);
578
579 return err;
580}
581
582size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
583{
584 return fprintf(fp, ": %s:%d\n", event->comm.comm, event->comm.tid);
585}
586
587int perf_event__process_comm(struct perf_tool *tool __maybe_unused,
588 union perf_event *event,
589 struct perf_sample *sample,
590 struct machine *machine)
591{
592 return machine__process_comm_event(machine, event, sample);
593}
594
595int perf_event__process_lost(struct perf_tool *tool __maybe_unused,
596 union perf_event *event,
597 struct perf_sample *sample,
598 struct machine *machine)
599{
600 return machine__process_lost_event(machine, event, sample);
601}
602
603size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
604{
605 return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %c %s\n",
606 event->mmap.pid, event->mmap.tid, event->mmap.start,
607 event->mmap.len, event->mmap.pgoff,
608 (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x',
609 event->mmap.filename);
610}
611
612size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp)
613{
614 return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64
615 " %02x:%02x %"PRIu64" %"PRIu64"]: %c %s\n",
616 event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
617 event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj,
618 event->mmap2.min, event->mmap2.ino,
619 event->mmap2.ino_generation,
620 (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x',
621 event->mmap2.filename);
622}
623
624int perf_event__process_mmap(struct perf_tool *tool __maybe_unused,
625 union perf_event *event,
626 struct perf_sample *sample,
627 struct machine *machine)
628{
629 return machine__process_mmap_event(machine, event, sample);
630}
631
632int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused,
633 union perf_event *event,
634 struct perf_sample *sample,
635 struct machine *machine)
636{
637 return machine__process_mmap2_event(machine, event, sample);
638}
639
640size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
641{
642 return fprintf(fp, "(%d:%d):(%d:%d)\n",
643 event->fork.pid, event->fork.tid,
644 event->fork.ppid, event->fork.ptid);
645}
646
647int perf_event__process_fork(struct perf_tool *tool __maybe_unused,
648 union perf_event *event,
649 struct perf_sample *sample,
650 struct machine *machine)
651{
652 return machine__process_fork_event(machine, event, sample);
653}
654
655int perf_event__process_exit(struct perf_tool *tool __maybe_unused,
656 union perf_event *event,
657 struct perf_sample *sample,
658 struct machine *machine)
659{
660 return machine__process_exit_event(machine, event, sample);
661}
662
663size_t perf_event__fprintf(union perf_event *event, FILE *fp)
664{
665 size_t ret = fprintf(fp, "PERF_RECORD_%s",
666 perf_event__name(event->header.type));
667
668 switch (event->header.type) {
669 case PERF_RECORD_COMM:
670 ret += perf_event__fprintf_comm(event, fp);
671 break;
672 case PERF_RECORD_FORK:
673 case PERF_RECORD_EXIT:
674 ret += perf_event__fprintf_task(event, fp);
675 break;
676 case PERF_RECORD_MMAP:
677 ret += perf_event__fprintf_mmap(event, fp);
678 break;
679 case PERF_RECORD_MMAP2:
680 ret += perf_event__fprintf_mmap2(event, fp);
681 break;
682 default:
683 ret += fprintf(fp, "\n");
684 }
685
686 return ret;
687}
688
689int perf_event__process(struct perf_tool *tool __maybe_unused,
690 union perf_event *event,
691 struct perf_sample *sample,
692 struct machine *machine)
693{
694 return machine__process_event(machine, event, sample);
695}
696
697void thread__find_addr_map(struct thread *thread,
698 struct machine *machine, u8 cpumode,
699 enum map_type type, u64 addr,
700 struct addr_location *al)
701{
702 struct map_groups *mg = &thread->mg;
703 bool load_map = false;
704
705 al->machine = machine;
706 al->thread = thread;
707 al->addr = addr;
708 al->cpumode = cpumode;
709 al->filtered = 0;
710
711 if (machine == NULL) {
712 al->map = NULL;
713 return;
714 }
715
716 if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
717 al->level = 'k';
718 mg = &machine->kmaps;
719 load_map = true;
720 } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
721 al->level = '.';
722 } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
723 al->level = 'g';
724 mg = &machine->kmaps;
725 load_map = true;
726 } else if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) {
727 al->level = 'u';
728 } else {
729 al->level = 'H';
730 al->map = NULL;
731
732 if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
733 cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
734 !perf_guest)
735 al->filtered |= (1 << HIST_FILTER__GUEST);
736 if ((cpumode == PERF_RECORD_MISC_USER ||
737 cpumode == PERF_RECORD_MISC_KERNEL) &&
738 !perf_host)
739 al->filtered |= (1 << HIST_FILTER__HOST);
740
741 return;
742 }
743try_again:
744 al->map = map_groups__find(mg, type, al->addr);
745 if (al->map == NULL) {
746 /*
747 * If this is outside of all known maps, and is a negative
748 * address, try to look it up in the kernel dso, as it might be
749 * a vsyscall or vdso (which executes in user-mode).
750 *
751 * XXX This is nasty, we should have a symbol list in the
752 * "[vdso]" dso, but for now lets use the old trick of looking
753 * in the whole kernel symbol list.
754 */
755 if ((long long)al->addr < 0 &&
756 cpumode == PERF_RECORD_MISC_USER &&
757 machine && mg != &machine->kmaps) {
758 mg = &machine->kmaps;
759 goto try_again;
760 }
761 } else {
762 /*
763 * Kernel maps might be changed when loading symbols so loading
764 * must be done prior to using kernel maps.
765 */
766 if (load_map)
767 map__load(al->map, machine->symbol_filter);
768 al->addr = al->map->map_ip(al->map, al->addr);
769 }
770}
771
772void thread__find_addr_location(struct thread *thread, struct machine *machine,
773 u8 cpumode, enum map_type type, u64 addr,
774 struct addr_location *al)
775{
776 thread__find_addr_map(thread, machine, cpumode, type, addr, al);
777 if (al->map != NULL)
778 al->sym = map__find_symbol(al->map, al->addr,
779 machine->symbol_filter);
780 else
781 al->sym = NULL;
782}
783
784int perf_event__preprocess_sample(const union perf_event *event,
785 struct machine *machine,
786 struct addr_location *al,
787 struct perf_sample *sample)
788{
789 u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
790 struct thread *thread = machine__findnew_thread(machine, sample->pid,
791 sample->pid);
792
793 if (thread == NULL)
794 return -1;
795
796 dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
797 /*
798 * Have we already created the kernel maps for this machine?
799 *
800 * This should have happened earlier, when we processed the kernel MMAP
801 * events, but for older perf.data files there was no such thing, so do
802 * it now.
803 */
804 if (cpumode == PERF_RECORD_MISC_KERNEL &&
805 machine->vmlinux_maps[MAP__FUNCTION] == NULL)
806 machine__create_kernel_maps(machine);
807
808 thread__find_addr_map(thread, machine, cpumode, MAP__FUNCTION,
809 sample->ip, al);
810 dump_printf(" ...... dso: %s\n",
811 al->map ? al->map->dso->long_name :
812 al->level == 'H' ? "[hypervisor]" : "<not found>");
813
814 if (thread__is_filtered(thread))
815 al->filtered |= (1 << HIST_FILTER__THREAD);
816
817 al->sym = NULL;
818 al->cpu = sample->cpu;
819
820 if (al->map) {
821 struct dso *dso = al->map->dso;
822
823 if (symbol_conf.dso_list &&
824 (!dso || !(strlist__has_entry(symbol_conf.dso_list,
825 dso->short_name) ||
826 (dso->short_name != dso->long_name &&
827 strlist__has_entry(symbol_conf.dso_list,
828 dso->long_name))))) {
829 al->filtered |= (1 << HIST_FILTER__DSO);
830 }
831
832 al->sym = map__find_symbol(al->map, al->addr,
833 machine->symbol_filter);
834 }
835
836 if (symbol_conf.sym_list &&
837 (!al->sym || !strlist__has_entry(symbol_conf.sym_list,
838 al->sym->name))) {
839 al->filtered |= (1 << HIST_FILTER__SYMBOL);
840 }
841
842 return 0;
843}
1#include <errno.h>
2#include <fcntl.h>
3#include <inttypes.h>
4#include <linux/kernel.h>
5#include <linux/types.h>
6#include <perf/cpumap.h>
7#include <sys/types.h>
8#include <sys/stat.h>
9#include <unistd.h>
10#include <uapi/linux/mman.h> /* To get things like MAP_HUGETLB even on older libc headers */
11#include <linux/perf_event.h>
12#include <linux/zalloc.h>
13#include "cpumap.h"
14#include "dso.h"
15#include "event.h"
16#include "debug.h"
17#include "hist.h"
18#include "machine.h"
19#include "sort.h"
20#include "string2.h"
21#include "strlist.h"
22#include "thread.h"
23#include "thread_map.h"
24#include "time-utils.h"
25#include <linux/ctype.h>
26#include "map.h"
27#include "util/namespaces.h"
28#include "symbol.h"
29#include "symbol/kallsyms.h"
30#include "asm/bug.h"
31#include "stat.h"
32#include "session.h"
33#include "bpf-event.h"
34#include "tool.h"
35#include "../perf.h"
36
37static const char *perf_event__names[] = {
38 [0] = "TOTAL",
39 [PERF_RECORD_MMAP] = "MMAP",
40 [PERF_RECORD_MMAP2] = "MMAP2",
41 [PERF_RECORD_LOST] = "LOST",
42 [PERF_RECORD_COMM] = "COMM",
43 [PERF_RECORD_EXIT] = "EXIT",
44 [PERF_RECORD_THROTTLE] = "THROTTLE",
45 [PERF_RECORD_UNTHROTTLE] = "UNTHROTTLE",
46 [PERF_RECORD_FORK] = "FORK",
47 [PERF_RECORD_READ] = "READ",
48 [PERF_RECORD_SAMPLE] = "SAMPLE",
49 [PERF_RECORD_AUX] = "AUX",
50 [PERF_RECORD_ITRACE_START] = "ITRACE_START",
51 [PERF_RECORD_LOST_SAMPLES] = "LOST_SAMPLES",
52 [PERF_RECORD_SWITCH] = "SWITCH",
53 [PERF_RECORD_SWITCH_CPU_WIDE] = "SWITCH_CPU_WIDE",
54 [PERF_RECORD_NAMESPACES] = "NAMESPACES",
55 [PERF_RECORD_KSYMBOL] = "KSYMBOL",
56 [PERF_RECORD_BPF_EVENT] = "BPF_EVENT",
57 [PERF_RECORD_HEADER_ATTR] = "ATTR",
58 [PERF_RECORD_HEADER_EVENT_TYPE] = "EVENT_TYPE",
59 [PERF_RECORD_HEADER_TRACING_DATA] = "TRACING_DATA",
60 [PERF_RECORD_HEADER_BUILD_ID] = "BUILD_ID",
61 [PERF_RECORD_FINISHED_ROUND] = "FINISHED_ROUND",
62 [PERF_RECORD_ID_INDEX] = "ID_INDEX",
63 [PERF_RECORD_AUXTRACE_INFO] = "AUXTRACE_INFO",
64 [PERF_RECORD_AUXTRACE] = "AUXTRACE",
65 [PERF_RECORD_AUXTRACE_ERROR] = "AUXTRACE_ERROR",
66 [PERF_RECORD_THREAD_MAP] = "THREAD_MAP",
67 [PERF_RECORD_CPU_MAP] = "CPU_MAP",
68 [PERF_RECORD_STAT_CONFIG] = "STAT_CONFIG",
69 [PERF_RECORD_STAT] = "STAT",
70 [PERF_RECORD_STAT_ROUND] = "STAT_ROUND",
71 [PERF_RECORD_EVENT_UPDATE] = "EVENT_UPDATE",
72 [PERF_RECORD_TIME_CONV] = "TIME_CONV",
73 [PERF_RECORD_HEADER_FEATURE] = "FEATURE",
74 [PERF_RECORD_COMPRESSED] = "COMPRESSED",
75};
76
77const char *perf_event__name(unsigned int id)
78{
79 if (id >= ARRAY_SIZE(perf_event__names))
80 return "INVALID";
81 if (!perf_event__names[id])
82 return "UNKNOWN";
83 return perf_event__names[id];
84}
85
86struct process_symbol_args {
87 const char *name;
88 u64 start;
89};
90
91static int find_symbol_cb(void *arg, const char *name, char type,
92 u64 start)
93{
94 struct process_symbol_args *args = arg;
95
96 /*
97 * Must be a function or at least an alias, as in PARISC64, where "_text" is
98 * an 'A' to the same address as "_stext".
99 */
100 if (!(kallsyms__is_function(type) ||
101 type == 'A') || strcmp(name, args->name))
102 return 0;
103
104 args->start = start;
105 return 1;
106}
107
108int kallsyms__get_function_start(const char *kallsyms_filename,
109 const char *symbol_name, u64 *addr)
110{
111 struct process_symbol_args args = { .name = symbol_name, };
112
113 if (kallsyms__parse(kallsyms_filename, &args, find_symbol_cb) <= 0)
114 return -1;
115
116 *addr = args.start;
117 return 0;
118}
119
120void perf_event__read_stat_config(struct perf_stat_config *config,
121 struct perf_record_stat_config *event)
122{
123 unsigned i;
124
125 for (i = 0; i < event->nr; i++) {
126
127 switch (event->data[i].tag) {
128#define CASE(__term, __val) \
129 case PERF_STAT_CONFIG_TERM__##__term: \
130 config->__val = event->data[i].val; \
131 break;
132
133 CASE(AGGR_MODE, aggr_mode)
134 CASE(SCALE, scale)
135 CASE(INTERVAL, interval)
136#undef CASE
137 default:
138 pr_warning("unknown stat config term %" PRI_lu64 "\n",
139 event->data[i].tag);
140 }
141 }
142}
143
144size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
145{
146 const char *s;
147
148 if (event->header.misc & PERF_RECORD_MISC_COMM_EXEC)
149 s = " exec";
150 else
151 s = "";
152
153 return fprintf(fp, "%s: %s:%d/%d\n", s, event->comm.comm, event->comm.pid, event->comm.tid);
154}
155
156size_t perf_event__fprintf_namespaces(union perf_event *event, FILE *fp)
157{
158 size_t ret = 0;
159 struct perf_ns_link_info *ns_link_info;
160 u32 nr_namespaces, idx;
161
162 ns_link_info = event->namespaces.link_info;
163 nr_namespaces = event->namespaces.nr_namespaces;
164
165 ret += fprintf(fp, " %d/%d - nr_namespaces: %u\n\t\t[",
166 event->namespaces.pid,
167 event->namespaces.tid,
168 nr_namespaces);
169
170 for (idx = 0; idx < nr_namespaces; idx++) {
171 if (idx && (idx % 4 == 0))
172 ret += fprintf(fp, "\n\t\t ");
173
174 ret += fprintf(fp, "%u/%s: %" PRIu64 "/%#" PRIx64 "%s", idx,
175 perf_ns__name(idx), (u64)ns_link_info[idx].dev,
176 (u64)ns_link_info[idx].ino,
177 ((idx + 1) != nr_namespaces) ? ", " : "]\n");
178 }
179
180 return ret;
181}
182
183int perf_event__process_comm(struct perf_tool *tool __maybe_unused,
184 union perf_event *event,
185 struct perf_sample *sample,
186 struct machine *machine)
187{
188 return machine__process_comm_event(machine, event, sample);
189}
190
191int perf_event__process_namespaces(struct perf_tool *tool __maybe_unused,
192 union perf_event *event,
193 struct perf_sample *sample,
194 struct machine *machine)
195{
196 return machine__process_namespaces_event(machine, event, sample);
197}
198
199int perf_event__process_lost(struct perf_tool *tool __maybe_unused,
200 union perf_event *event,
201 struct perf_sample *sample,
202 struct machine *machine)
203{
204 return machine__process_lost_event(machine, event, sample);
205}
206
207int perf_event__process_aux(struct perf_tool *tool __maybe_unused,
208 union perf_event *event,
209 struct perf_sample *sample __maybe_unused,
210 struct machine *machine)
211{
212 return machine__process_aux_event(machine, event);
213}
214
215int perf_event__process_itrace_start(struct perf_tool *tool __maybe_unused,
216 union perf_event *event,
217 struct perf_sample *sample __maybe_unused,
218 struct machine *machine)
219{
220 return machine__process_itrace_start_event(machine, event);
221}
222
223int perf_event__process_lost_samples(struct perf_tool *tool __maybe_unused,
224 union perf_event *event,
225 struct perf_sample *sample,
226 struct machine *machine)
227{
228 return machine__process_lost_samples_event(machine, event, sample);
229}
230
231int perf_event__process_switch(struct perf_tool *tool __maybe_unused,
232 union perf_event *event,
233 struct perf_sample *sample __maybe_unused,
234 struct machine *machine)
235{
236 return machine__process_switch_event(machine, event);
237}
238
239int perf_event__process_ksymbol(struct perf_tool *tool __maybe_unused,
240 union perf_event *event,
241 struct perf_sample *sample __maybe_unused,
242 struct machine *machine)
243{
244 return machine__process_ksymbol(machine, event, sample);
245}
246
247int perf_event__process_bpf(struct perf_tool *tool __maybe_unused,
248 union perf_event *event,
249 struct perf_sample *sample,
250 struct machine *machine)
251{
252 return machine__process_bpf(machine, event, sample);
253}
254
255size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
256{
257 return fprintf(fp, " %d/%d: [%#" PRI_lx64 "(%#" PRI_lx64 ") @ %#" PRI_lx64 "]: %c %s\n",
258 event->mmap.pid, event->mmap.tid, event->mmap.start,
259 event->mmap.len, event->mmap.pgoff,
260 (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x',
261 event->mmap.filename);
262}
263
264size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp)
265{
266 return fprintf(fp, " %d/%d: [%#" PRI_lx64 "(%#" PRI_lx64 ") @ %#" PRI_lx64
267 " %02x:%02x %"PRI_lu64" %"PRI_lu64"]: %c%c%c%c %s\n",
268 event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
269 event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj,
270 event->mmap2.min, event->mmap2.ino,
271 event->mmap2.ino_generation,
272 (event->mmap2.prot & PROT_READ) ? 'r' : '-',
273 (event->mmap2.prot & PROT_WRITE) ? 'w' : '-',
274 (event->mmap2.prot & PROT_EXEC) ? 'x' : '-',
275 (event->mmap2.flags & MAP_SHARED) ? 's' : 'p',
276 event->mmap2.filename);
277}
278
279size_t perf_event__fprintf_thread_map(union perf_event *event, FILE *fp)
280{
281 struct perf_thread_map *threads = thread_map__new_event(&event->thread_map);
282 size_t ret;
283
284 ret = fprintf(fp, " nr: ");
285
286 if (threads)
287 ret += thread_map__fprintf(threads, fp);
288 else
289 ret += fprintf(fp, "failed to get threads from event\n");
290
291 perf_thread_map__put(threads);
292 return ret;
293}
294
295size_t perf_event__fprintf_cpu_map(union perf_event *event, FILE *fp)
296{
297 struct perf_cpu_map *cpus = cpu_map__new_data(&event->cpu_map.data);
298 size_t ret;
299
300 ret = fprintf(fp, ": ");
301
302 if (cpus)
303 ret += cpu_map__fprintf(cpus, fp);
304 else
305 ret += fprintf(fp, "failed to get cpumap from event\n");
306
307 perf_cpu_map__put(cpus);
308 return ret;
309}
310
311int perf_event__process_mmap(struct perf_tool *tool __maybe_unused,
312 union perf_event *event,
313 struct perf_sample *sample,
314 struct machine *machine)
315{
316 return machine__process_mmap_event(machine, event, sample);
317}
318
319int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused,
320 union perf_event *event,
321 struct perf_sample *sample,
322 struct machine *machine)
323{
324 return machine__process_mmap2_event(machine, event, sample);
325}
326
327size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
328{
329 return fprintf(fp, "(%d:%d):(%d:%d)\n",
330 event->fork.pid, event->fork.tid,
331 event->fork.ppid, event->fork.ptid);
332}
333
334int perf_event__process_fork(struct perf_tool *tool __maybe_unused,
335 union perf_event *event,
336 struct perf_sample *sample,
337 struct machine *machine)
338{
339 return machine__process_fork_event(machine, event, sample);
340}
341
342int perf_event__process_exit(struct perf_tool *tool __maybe_unused,
343 union perf_event *event,
344 struct perf_sample *sample,
345 struct machine *machine)
346{
347 return machine__process_exit_event(machine, event, sample);
348}
349
350size_t perf_event__fprintf_aux(union perf_event *event, FILE *fp)
351{
352 return fprintf(fp, " offset: %#"PRI_lx64" size: %#"PRI_lx64" flags: %#"PRI_lx64" [%s%s%s]\n",
353 event->aux.aux_offset, event->aux.aux_size,
354 event->aux.flags,
355 event->aux.flags & PERF_AUX_FLAG_TRUNCATED ? "T" : "",
356 event->aux.flags & PERF_AUX_FLAG_OVERWRITE ? "O" : "",
357 event->aux.flags & PERF_AUX_FLAG_PARTIAL ? "P" : "");
358}
359
360size_t perf_event__fprintf_itrace_start(union perf_event *event, FILE *fp)
361{
362 return fprintf(fp, " pid: %u tid: %u\n",
363 event->itrace_start.pid, event->itrace_start.tid);
364}
365
366size_t perf_event__fprintf_switch(union perf_event *event, FILE *fp)
367{
368 bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT;
369 const char *in_out = !out ? "IN " :
370 !(event->header.misc & PERF_RECORD_MISC_SWITCH_OUT_PREEMPT) ?
371 "OUT " : "OUT preempt";
372
373 if (event->header.type == PERF_RECORD_SWITCH)
374 return fprintf(fp, " %s\n", in_out);
375
376 return fprintf(fp, " %s %s pid/tid: %5u/%-5u\n",
377 in_out, out ? "next" : "prev",
378 event->context_switch.next_prev_pid,
379 event->context_switch.next_prev_tid);
380}
381
382static size_t perf_event__fprintf_lost(union perf_event *event, FILE *fp)
383{
384 return fprintf(fp, " lost %" PRI_lu64 "\n", event->lost.lost);
385}
386
387size_t perf_event__fprintf_ksymbol(union perf_event *event, FILE *fp)
388{
389 return fprintf(fp, " addr %" PRI_lx64 " len %u type %u flags 0x%x name %s\n",
390 event->ksymbol.addr, event->ksymbol.len,
391 event->ksymbol.ksym_type,
392 event->ksymbol.flags, event->ksymbol.name);
393}
394
395size_t perf_event__fprintf_bpf(union perf_event *event, FILE *fp)
396{
397 return fprintf(fp, " type %u, flags %u, id %u\n",
398 event->bpf.type, event->bpf.flags, event->bpf.id);
399}
400
401size_t perf_event__fprintf(union perf_event *event, FILE *fp)
402{
403 size_t ret = fprintf(fp, "PERF_RECORD_%s",
404 perf_event__name(event->header.type));
405
406 switch (event->header.type) {
407 case PERF_RECORD_COMM:
408 ret += perf_event__fprintf_comm(event, fp);
409 break;
410 case PERF_RECORD_FORK:
411 case PERF_RECORD_EXIT:
412 ret += perf_event__fprintf_task(event, fp);
413 break;
414 case PERF_RECORD_MMAP:
415 ret += perf_event__fprintf_mmap(event, fp);
416 break;
417 case PERF_RECORD_NAMESPACES:
418 ret += perf_event__fprintf_namespaces(event, fp);
419 break;
420 case PERF_RECORD_MMAP2:
421 ret += perf_event__fprintf_mmap2(event, fp);
422 break;
423 case PERF_RECORD_AUX:
424 ret += perf_event__fprintf_aux(event, fp);
425 break;
426 case PERF_RECORD_ITRACE_START:
427 ret += perf_event__fprintf_itrace_start(event, fp);
428 break;
429 case PERF_RECORD_SWITCH:
430 case PERF_RECORD_SWITCH_CPU_WIDE:
431 ret += perf_event__fprintf_switch(event, fp);
432 break;
433 case PERF_RECORD_LOST:
434 ret += perf_event__fprintf_lost(event, fp);
435 break;
436 case PERF_RECORD_KSYMBOL:
437 ret += perf_event__fprintf_ksymbol(event, fp);
438 break;
439 case PERF_RECORD_BPF_EVENT:
440 ret += perf_event__fprintf_bpf(event, fp);
441 break;
442 default:
443 ret += fprintf(fp, "\n");
444 }
445
446 return ret;
447}
448
449int perf_event__process(struct perf_tool *tool __maybe_unused,
450 union perf_event *event,
451 struct perf_sample *sample,
452 struct machine *machine)
453{
454 return machine__process_event(machine, event, sample);
455}
456
457struct map *thread__find_map(struct thread *thread, u8 cpumode, u64 addr,
458 struct addr_location *al)
459{
460 struct map_groups *mg = thread->mg;
461 struct machine *machine = mg->machine;
462 bool load_map = false;
463
464 al->machine = machine;
465 al->thread = thread;
466 al->addr = addr;
467 al->cpumode = cpumode;
468 al->filtered = 0;
469
470 if (machine == NULL) {
471 al->map = NULL;
472 return NULL;
473 }
474
475 if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
476 al->level = 'k';
477 mg = &machine->kmaps;
478 load_map = true;
479 } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
480 al->level = '.';
481 } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
482 al->level = 'g';
483 mg = &machine->kmaps;
484 load_map = true;
485 } else if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) {
486 al->level = 'u';
487 } else {
488 al->level = 'H';
489 al->map = NULL;
490
491 if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
492 cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
493 !perf_guest)
494 al->filtered |= (1 << HIST_FILTER__GUEST);
495 if ((cpumode == PERF_RECORD_MISC_USER ||
496 cpumode == PERF_RECORD_MISC_KERNEL) &&
497 !perf_host)
498 al->filtered |= (1 << HIST_FILTER__HOST);
499
500 return NULL;
501 }
502
503 al->map = map_groups__find(mg, al->addr);
504 if (al->map != NULL) {
505 /*
506 * Kernel maps might be changed when loading symbols so loading
507 * must be done prior to using kernel maps.
508 */
509 if (load_map)
510 map__load(al->map);
511 al->addr = al->map->map_ip(al->map, al->addr);
512 }
513
514 return al->map;
515}
516
517/*
518 * For branch stacks or branch samples, the sample cpumode might not be correct
519 * because it applies only to the sample 'ip' and not necessary to 'addr' or
520 * branch stack addresses. If possible, use a fallback to deal with those cases.
521 */
522struct map *thread__find_map_fb(struct thread *thread, u8 cpumode, u64 addr,
523 struct addr_location *al)
524{
525 struct map *map = thread__find_map(thread, cpumode, addr, al);
526 struct machine *machine = thread->mg->machine;
527 u8 addr_cpumode = machine__addr_cpumode(machine, cpumode, addr);
528
529 if (map || addr_cpumode == cpumode)
530 return map;
531
532 return thread__find_map(thread, addr_cpumode, addr, al);
533}
534
535struct symbol *thread__find_symbol(struct thread *thread, u8 cpumode,
536 u64 addr, struct addr_location *al)
537{
538 al->sym = NULL;
539 if (thread__find_map(thread, cpumode, addr, al))
540 al->sym = map__find_symbol(al->map, al->addr);
541 return al->sym;
542}
543
544struct symbol *thread__find_symbol_fb(struct thread *thread, u8 cpumode,
545 u64 addr, struct addr_location *al)
546{
547 al->sym = NULL;
548 if (thread__find_map_fb(thread, cpumode, addr, al))
549 al->sym = map__find_symbol(al->map, al->addr);
550 return al->sym;
551}
552
553/*
554 * Callers need to drop the reference to al->thread, obtained in
555 * machine__findnew_thread()
556 */
557int machine__resolve(struct machine *machine, struct addr_location *al,
558 struct perf_sample *sample)
559{
560 struct thread *thread = machine__findnew_thread(machine, sample->pid,
561 sample->tid);
562
563 if (thread == NULL)
564 return -1;
565
566 dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
567 thread__find_map(thread, sample->cpumode, sample->ip, al);
568 dump_printf(" ...... dso: %s\n",
569 al->map ? al->map->dso->long_name :
570 al->level == 'H' ? "[hypervisor]" : "<not found>");
571
572 if (thread__is_filtered(thread))
573 al->filtered |= (1 << HIST_FILTER__THREAD);
574
575 al->sym = NULL;
576 al->cpu = sample->cpu;
577 al->socket = -1;
578 al->srcline = NULL;
579
580 if (al->cpu >= 0) {
581 struct perf_env *env = machine->env;
582
583 if (env && env->cpu)
584 al->socket = env->cpu[al->cpu].socket_id;
585 }
586
587 if (al->map) {
588 struct dso *dso = al->map->dso;
589
590 if (symbol_conf.dso_list &&
591 (!dso || !(strlist__has_entry(symbol_conf.dso_list,
592 dso->short_name) ||
593 (dso->short_name != dso->long_name &&
594 strlist__has_entry(symbol_conf.dso_list,
595 dso->long_name))))) {
596 al->filtered |= (1 << HIST_FILTER__DSO);
597 }
598
599 al->sym = map__find_symbol(al->map, al->addr);
600 }
601
602 if (symbol_conf.sym_list &&
603 (!al->sym || !strlist__has_entry(symbol_conf.sym_list,
604 al->sym->name))) {
605 al->filtered |= (1 << HIST_FILTER__SYMBOL);
606 }
607
608 return 0;
609}
610
611/*
612 * The preprocess_sample method will return with reference counts for the
613 * in it, when done using (and perhaps getting ref counts if needing to
614 * keep a pointer to one of those entries) it must be paired with
615 * addr_location__put(), so that the refcounts can be decremented.
616 */
617void addr_location__put(struct addr_location *al)
618{
619 thread__zput(al->thread);
620}
621
622bool is_bts_event(struct perf_event_attr *attr)
623{
624 return attr->type == PERF_TYPE_HARDWARE &&
625 (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) &&
626 attr->sample_period == 1;
627}
628
629bool sample_addr_correlates_sym(struct perf_event_attr *attr)
630{
631 if (attr->type == PERF_TYPE_SOFTWARE &&
632 (attr->config == PERF_COUNT_SW_PAGE_FAULTS ||
633 attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
634 attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ))
635 return true;
636
637 if (is_bts_event(attr))
638 return true;
639
640 return false;
641}
642
643void thread__resolve(struct thread *thread, struct addr_location *al,
644 struct perf_sample *sample)
645{
646 thread__find_map_fb(thread, sample->cpumode, sample->addr, al);
647
648 al->cpu = sample->cpu;
649 al->sym = NULL;
650
651 if (al->map)
652 al->sym = map__find_symbol(al->map, al->addr);
653}