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