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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#include "asm/bug.h"
14#include "stat.h"
15
16static const char *perf_event__names[] = {
17 [0] = "TOTAL",
18 [PERF_RECORD_MMAP] = "MMAP",
19 [PERF_RECORD_MMAP2] = "MMAP2",
20 [PERF_RECORD_LOST] = "LOST",
21 [PERF_RECORD_COMM] = "COMM",
22 [PERF_RECORD_EXIT] = "EXIT",
23 [PERF_RECORD_THROTTLE] = "THROTTLE",
24 [PERF_RECORD_UNTHROTTLE] = "UNTHROTTLE",
25 [PERF_RECORD_FORK] = "FORK",
26 [PERF_RECORD_READ] = "READ",
27 [PERF_RECORD_SAMPLE] = "SAMPLE",
28 [PERF_RECORD_AUX] = "AUX",
29 [PERF_RECORD_ITRACE_START] = "ITRACE_START",
30 [PERF_RECORD_LOST_SAMPLES] = "LOST_SAMPLES",
31 [PERF_RECORD_SWITCH] = "SWITCH",
32 [PERF_RECORD_SWITCH_CPU_WIDE] = "SWITCH_CPU_WIDE",
33 [PERF_RECORD_HEADER_ATTR] = "ATTR",
34 [PERF_RECORD_HEADER_EVENT_TYPE] = "EVENT_TYPE",
35 [PERF_RECORD_HEADER_TRACING_DATA] = "TRACING_DATA",
36 [PERF_RECORD_HEADER_BUILD_ID] = "BUILD_ID",
37 [PERF_RECORD_FINISHED_ROUND] = "FINISHED_ROUND",
38 [PERF_RECORD_ID_INDEX] = "ID_INDEX",
39 [PERF_RECORD_AUXTRACE_INFO] = "AUXTRACE_INFO",
40 [PERF_RECORD_AUXTRACE] = "AUXTRACE",
41 [PERF_RECORD_AUXTRACE_ERROR] = "AUXTRACE_ERROR",
42 [PERF_RECORD_THREAD_MAP] = "THREAD_MAP",
43 [PERF_RECORD_CPU_MAP] = "CPU_MAP",
44 [PERF_RECORD_STAT_CONFIG] = "STAT_CONFIG",
45 [PERF_RECORD_STAT] = "STAT",
46 [PERF_RECORD_STAT_ROUND] = "STAT_ROUND",
47 [PERF_RECORD_EVENT_UPDATE] = "EVENT_UPDATE",
48};
49
50const char *perf_event__name(unsigned int id)
51{
52 if (id >= ARRAY_SIZE(perf_event__names))
53 return "INVALID";
54 if (!perf_event__names[id])
55 return "UNKNOWN";
56 return perf_event__names[id];
57}
58
59static int perf_tool__process_synth_event(struct perf_tool *tool,
60 union perf_event *event,
61 struct machine *machine,
62 perf_event__handler_t process)
63{
64 struct perf_sample synth_sample = {
65 .pid = -1,
66 .tid = -1,
67 .time = -1,
68 .stream_id = -1,
69 .cpu = -1,
70 .period = 1,
71 .cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK,
72 };
73
74 return process(tool, event, &synth_sample, machine);
75};
76
77/*
78 * Assumes that the first 4095 bytes of /proc/pid/stat contains
79 * the comm, tgid and ppid.
80 */
81static int perf_event__get_comm_ids(pid_t pid, char *comm, size_t len,
82 pid_t *tgid, pid_t *ppid)
83{
84 char filename[PATH_MAX];
85 char bf[4096];
86 int fd;
87 size_t size = 0;
88 ssize_t n;
89 char *nl, *name, *tgids, *ppids;
90
91 *tgid = -1;
92 *ppid = -1;
93
94 snprintf(filename, sizeof(filename), "/proc/%d/status", pid);
95
96 fd = open(filename, O_RDONLY);
97 if (fd < 0) {
98 pr_debug("couldn't open %s\n", filename);
99 return -1;
100 }
101
102 n = read(fd, bf, sizeof(bf) - 1);
103 close(fd);
104 if (n <= 0) {
105 pr_warning("Couldn't get COMM, tigd and ppid for pid %d\n",
106 pid);
107 return -1;
108 }
109 bf[n] = '\0';
110
111 name = strstr(bf, "Name:");
112 tgids = strstr(bf, "Tgid:");
113 ppids = strstr(bf, "PPid:");
114
115 if (name) {
116 name += 5; /* strlen("Name:") */
117
118 while (*name && isspace(*name))
119 ++name;
120
121 nl = strchr(name, '\n');
122 if (nl)
123 *nl = '\0';
124
125 size = strlen(name);
126 if (size >= len)
127 size = len - 1;
128 memcpy(comm, name, size);
129 comm[size] = '\0';
130 } else {
131 pr_debug("Name: string not found for pid %d\n", pid);
132 }
133
134 if (tgids) {
135 tgids += 5; /* strlen("Tgid:") */
136 *tgid = atoi(tgids);
137 } else {
138 pr_debug("Tgid: string not found for pid %d\n", pid);
139 }
140
141 if (ppids) {
142 ppids += 5; /* strlen("PPid:") */
143 *ppid = atoi(ppids);
144 } else {
145 pr_debug("PPid: string not found for pid %d\n", pid);
146 }
147
148 return 0;
149}
150
151static int perf_event__prepare_comm(union perf_event *event, pid_t pid,
152 struct machine *machine,
153 pid_t *tgid, pid_t *ppid)
154{
155 size_t size;
156
157 *ppid = -1;
158
159 memset(&event->comm, 0, sizeof(event->comm));
160
161 if (machine__is_host(machine)) {
162 if (perf_event__get_comm_ids(pid, event->comm.comm,
163 sizeof(event->comm.comm),
164 tgid, ppid) != 0) {
165 return -1;
166 }
167 } else {
168 *tgid = machine->pid;
169 }
170
171 if (*tgid < 0)
172 return -1;
173
174 event->comm.pid = *tgid;
175 event->comm.header.type = PERF_RECORD_COMM;
176
177 size = strlen(event->comm.comm) + 1;
178 size = PERF_ALIGN(size, sizeof(u64));
179 memset(event->comm.comm + size, 0, machine->id_hdr_size);
180 event->comm.header.size = (sizeof(event->comm) -
181 (sizeof(event->comm.comm) - size) +
182 machine->id_hdr_size);
183 event->comm.tid = pid;
184
185 return 0;
186}
187
188pid_t perf_event__synthesize_comm(struct perf_tool *tool,
189 union perf_event *event, pid_t pid,
190 perf_event__handler_t process,
191 struct machine *machine)
192{
193 pid_t tgid, ppid;
194
195 if (perf_event__prepare_comm(event, pid, machine, &tgid, &ppid) != 0)
196 return -1;
197
198 if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
199 return -1;
200
201 return tgid;
202}
203
204static int perf_event__synthesize_fork(struct perf_tool *tool,
205 union perf_event *event,
206 pid_t pid, pid_t tgid, pid_t ppid,
207 perf_event__handler_t process,
208 struct machine *machine)
209{
210 memset(&event->fork, 0, sizeof(event->fork) + machine->id_hdr_size);
211
212 /*
213 * for main thread set parent to ppid from status file. For other
214 * threads set parent pid to main thread. ie., assume main thread
215 * spawns all threads in a process
216 */
217 if (tgid == pid) {
218 event->fork.ppid = ppid;
219 event->fork.ptid = ppid;
220 } else {
221 event->fork.ppid = tgid;
222 event->fork.ptid = tgid;
223 }
224 event->fork.pid = tgid;
225 event->fork.tid = pid;
226 event->fork.header.type = PERF_RECORD_FORK;
227
228 event->fork.header.size = (sizeof(event->fork) + machine->id_hdr_size);
229
230 if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
231 return -1;
232
233 return 0;
234}
235
236int perf_event__synthesize_mmap_events(struct perf_tool *tool,
237 union perf_event *event,
238 pid_t pid, pid_t tgid,
239 perf_event__handler_t process,
240 struct machine *machine,
241 bool mmap_data,
242 unsigned int proc_map_timeout)
243{
244 char filename[PATH_MAX];
245 FILE *fp;
246 unsigned long long t;
247 bool truncation = false;
248 unsigned long long timeout = proc_map_timeout * 1000000ULL;
249 int rc = 0;
250
251 if (machine__is_default_guest(machine))
252 return 0;
253
254 snprintf(filename, sizeof(filename), "%s/proc/%d/maps",
255 machine->root_dir, pid);
256
257 fp = fopen(filename, "r");
258 if (fp == NULL) {
259 /*
260 * We raced with a task exiting - just return:
261 */
262 pr_debug("couldn't open %s\n", filename);
263 return -1;
264 }
265
266 event->header.type = PERF_RECORD_MMAP2;
267 t = rdclock();
268
269 while (1) {
270 char bf[BUFSIZ];
271 char prot[5];
272 char execname[PATH_MAX];
273 char anonstr[] = "//anon";
274 unsigned int ino;
275 size_t size;
276 ssize_t n;
277
278 if (fgets(bf, sizeof(bf), fp) == NULL)
279 break;
280
281 if ((rdclock() - t) > timeout) {
282 pr_warning("Reading %s time out. "
283 "You may want to increase "
284 "the time limit by --proc-map-timeout\n",
285 filename);
286 truncation = true;
287 goto out;
288 }
289
290 /* ensure null termination since stack will be reused. */
291 strcpy(execname, "");
292
293 /* 00400000-0040c000 r-xp 00000000 fd:01 41038 /bin/cat */
294 n = sscanf(bf, "%"PRIx64"-%"PRIx64" %s %"PRIx64" %x:%x %u %[^\n]\n",
295 &event->mmap2.start, &event->mmap2.len, prot,
296 &event->mmap2.pgoff, &event->mmap2.maj,
297 &event->mmap2.min,
298 &ino, execname);
299
300 /*
301 * Anon maps don't have the execname.
302 */
303 if (n < 7)
304 continue;
305
306 event->mmap2.ino = (u64)ino;
307
308 /*
309 * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
310 */
311 if (machine__is_host(machine))
312 event->header.misc = PERF_RECORD_MISC_USER;
313 else
314 event->header.misc = PERF_RECORD_MISC_GUEST_USER;
315
316 /* map protection and flags bits */
317 event->mmap2.prot = 0;
318 event->mmap2.flags = 0;
319 if (prot[0] == 'r')
320 event->mmap2.prot |= PROT_READ;
321 if (prot[1] == 'w')
322 event->mmap2.prot |= PROT_WRITE;
323 if (prot[2] == 'x')
324 event->mmap2.prot |= PROT_EXEC;
325
326 if (prot[3] == 's')
327 event->mmap2.flags |= MAP_SHARED;
328 else
329 event->mmap2.flags |= MAP_PRIVATE;
330
331 if (prot[2] != 'x') {
332 if (!mmap_data || prot[0] != 'r')
333 continue;
334
335 event->header.misc |= PERF_RECORD_MISC_MMAP_DATA;
336 }
337
338out:
339 if (truncation)
340 event->header.misc |= PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT;
341
342 if (!strcmp(execname, ""))
343 strcpy(execname, anonstr);
344
345 size = strlen(execname) + 1;
346 memcpy(event->mmap2.filename, execname, size);
347 size = PERF_ALIGN(size, sizeof(u64));
348 event->mmap2.len -= event->mmap.start;
349 event->mmap2.header.size = (sizeof(event->mmap2) -
350 (sizeof(event->mmap2.filename) - size));
351 memset(event->mmap2.filename + size, 0, machine->id_hdr_size);
352 event->mmap2.header.size += machine->id_hdr_size;
353 event->mmap2.pid = tgid;
354 event->mmap2.tid = pid;
355
356 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
357 rc = -1;
358 break;
359 }
360
361 if (truncation)
362 break;
363 }
364
365 fclose(fp);
366 return rc;
367}
368
369int perf_event__synthesize_modules(struct perf_tool *tool,
370 perf_event__handler_t process,
371 struct machine *machine)
372{
373 int rc = 0;
374 struct map *pos;
375 struct map_groups *kmaps = &machine->kmaps;
376 struct maps *maps = &kmaps->maps[MAP__FUNCTION];
377 union perf_event *event = zalloc((sizeof(event->mmap) +
378 machine->id_hdr_size));
379 if (event == NULL) {
380 pr_debug("Not enough memory synthesizing mmap event "
381 "for kernel modules\n");
382 return -1;
383 }
384
385 event->header.type = PERF_RECORD_MMAP;
386
387 /*
388 * kernel uses 0 for user space maps, see kernel/perf_event.c
389 * __perf_event_mmap
390 */
391 if (machine__is_host(machine))
392 event->header.misc = PERF_RECORD_MISC_KERNEL;
393 else
394 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
395
396 for (pos = maps__first(maps); pos; pos = map__next(pos)) {
397 size_t size;
398
399 if (__map__is_kernel(pos))
400 continue;
401
402 size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
403 event->mmap.header.type = PERF_RECORD_MMAP;
404 event->mmap.header.size = (sizeof(event->mmap) -
405 (sizeof(event->mmap.filename) - size));
406 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
407 event->mmap.header.size += machine->id_hdr_size;
408 event->mmap.start = pos->start;
409 event->mmap.len = pos->end - pos->start;
410 event->mmap.pid = machine->pid;
411
412 memcpy(event->mmap.filename, pos->dso->long_name,
413 pos->dso->long_name_len + 1);
414 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
415 rc = -1;
416 break;
417 }
418 }
419
420 free(event);
421 return rc;
422}
423
424static int __event__synthesize_thread(union perf_event *comm_event,
425 union perf_event *mmap_event,
426 union perf_event *fork_event,
427 pid_t pid, int full,
428 perf_event__handler_t process,
429 struct perf_tool *tool,
430 struct machine *machine,
431 bool mmap_data,
432 unsigned int proc_map_timeout)
433{
434 char filename[PATH_MAX];
435 DIR *tasks;
436 struct dirent *dirent;
437 pid_t tgid, ppid;
438 int rc = 0;
439
440 /* special case: only send one comm event using passed in pid */
441 if (!full) {
442 tgid = perf_event__synthesize_comm(tool, comm_event, pid,
443 process, machine);
444
445 if (tgid == -1)
446 return -1;
447
448 return perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
449 process, machine, mmap_data,
450 proc_map_timeout);
451 }
452
453 if (machine__is_default_guest(machine))
454 return 0;
455
456 snprintf(filename, sizeof(filename), "%s/proc/%d/task",
457 machine->root_dir, pid);
458
459 tasks = opendir(filename);
460 if (tasks == NULL) {
461 pr_debug("couldn't open %s\n", filename);
462 return 0;
463 }
464
465 while ((dirent = readdir(tasks)) != NULL) {
466 char *end;
467 pid_t _pid;
468
469 _pid = strtol(dirent->d_name, &end, 10);
470 if (*end)
471 continue;
472
473 rc = -1;
474 if (perf_event__prepare_comm(comm_event, _pid, machine,
475 &tgid, &ppid) != 0)
476 break;
477
478 if (perf_event__synthesize_fork(tool, fork_event, _pid, tgid,
479 ppid, process, machine) < 0)
480 break;
481 /*
482 * Send the prepared comm event
483 */
484 if (perf_tool__process_synth_event(tool, comm_event, machine, process) != 0)
485 break;
486
487 rc = 0;
488 if (_pid == pid) {
489 /* process the parent's maps too */
490 rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
491 process, machine, mmap_data, proc_map_timeout);
492 if (rc)
493 break;
494 }
495 }
496
497 closedir(tasks);
498 return rc;
499}
500
501int perf_event__synthesize_thread_map(struct perf_tool *tool,
502 struct thread_map *threads,
503 perf_event__handler_t process,
504 struct machine *machine,
505 bool mmap_data,
506 unsigned int proc_map_timeout)
507{
508 union perf_event *comm_event, *mmap_event, *fork_event;
509 int err = -1, thread, j;
510
511 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
512 if (comm_event == NULL)
513 goto out;
514
515 mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
516 if (mmap_event == NULL)
517 goto out_free_comm;
518
519 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
520 if (fork_event == NULL)
521 goto out_free_mmap;
522
523 err = 0;
524 for (thread = 0; thread < threads->nr; ++thread) {
525 if (__event__synthesize_thread(comm_event, mmap_event,
526 fork_event,
527 thread_map__pid(threads, thread), 0,
528 process, tool, machine,
529 mmap_data, proc_map_timeout)) {
530 err = -1;
531 break;
532 }
533
534 /*
535 * comm.pid is set to thread group id by
536 * perf_event__synthesize_comm
537 */
538 if ((int) comm_event->comm.pid != thread_map__pid(threads, thread)) {
539 bool need_leader = true;
540
541 /* is thread group leader in thread_map? */
542 for (j = 0; j < threads->nr; ++j) {
543 if ((int) comm_event->comm.pid == thread_map__pid(threads, j)) {
544 need_leader = false;
545 break;
546 }
547 }
548
549 /* if not, generate events for it */
550 if (need_leader &&
551 __event__synthesize_thread(comm_event, mmap_event,
552 fork_event,
553 comm_event->comm.pid, 0,
554 process, tool, machine,
555 mmap_data, proc_map_timeout)) {
556 err = -1;
557 break;
558 }
559 }
560 }
561 free(fork_event);
562out_free_mmap:
563 free(mmap_event);
564out_free_comm:
565 free(comm_event);
566out:
567 return err;
568}
569
570int perf_event__synthesize_threads(struct perf_tool *tool,
571 perf_event__handler_t process,
572 struct machine *machine,
573 bool mmap_data,
574 unsigned int proc_map_timeout)
575{
576 DIR *proc;
577 char proc_path[PATH_MAX];
578 struct dirent *dirent;
579 union perf_event *comm_event, *mmap_event, *fork_event;
580 int err = -1;
581
582 if (machine__is_default_guest(machine))
583 return 0;
584
585 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
586 if (comm_event == NULL)
587 goto out;
588
589 mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
590 if (mmap_event == NULL)
591 goto out_free_comm;
592
593 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
594 if (fork_event == NULL)
595 goto out_free_mmap;
596
597 snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir);
598 proc = opendir(proc_path);
599
600 if (proc == NULL)
601 goto out_free_fork;
602
603 while ((dirent = readdir(proc)) != NULL) {
604 char *end;
605 pid_t pid = strtol(dirent->d_name, &end, 10);
606
607 if (*end) /* only interested in proper numerical dirents */
608 continue;
609 /*
610 * We may race with exiting thread, so don't stop just because
611 * one thread couldn't be synthesized.
612 */
613 __event__synthesize_thread(comm_event, mmap_event, fork_event, pid,
614 1, process, tool, machine, mmap_data,
615 proc_map_timeout);
616 }
617
618 err = 0;
619 closedir(proc);
620out_free_fork:
621 free(fork_event);
622out_free_mmap:
623 free(mmap_event);
624out_free_comm:
625 free(comm_event);
626out:
627 return err;
628}
629
630struct process_symbol_args {
631 const char *name;
632 u64 start;
633};
634
635static int find_symbol_cb(void *arg, const char *name, char type,
636 u64 start)
637{
638 struct process_symbol_args *args = arg;
639
640 /*
641 * Must be a function or at least an alias, as in PARISC64, where "_text" is
642 * an 'A' to the same address as "_stext".
643 */
644 if (!(symbol_type__is_a(type, MAP__FUNCTION) ||
645 type == 'A') || strcmp(name, args->name))
646 return 0;
647
648 args->start = start;
649 return 1;
650}
651
652u64 kallsyms__get_function_start(const char *kallsyms_filename,
653 const char *symbol_name)
654{
655 struct process_symbol_args args = { .name = symbol_name, };
656
657 if (kallsyms__parse(kallsyms_filename, &args, find_symbol_cb) <= 0)
658 return 0;
659
660 return args.start;
661}
662
663int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
664 perf_event__handler_t process,
665 struct machine *machine)
666{
667 size_t size;
668 const char *mmap_name;
669 char name_buff[PATH_MAX];
670 struct map *map = machine__kernel_map(machine);
671 struct kmap *kmap;
672 int err;
673 union perf_event *event;
674
675 if (map == NULL)
676 return -1;
677
678 /*
679 * We should get this from /sys/kernel/sections/.text, but till that is
680 * available use this, and after it is use this as a fallback for older
681 * kernels.
682 */
683 event = zalloc((sizeof(event->mmap) + machine->id_hdr_size));
684 if (event == NULL) {
685 pr_debug("Not enough memory synthesizing mmap event "
686 "for kernel modules\n");
687 return -1;
688 }
689
690 mmap_name = machine__mmap_name(machine, name_buff, sizeof(name_buff));
691 if (machine__is_host(machine)) {
692 /*
693 * kernel uses PERF_RECORD_MISC_USER for user space maps,
694 * see kernel/perf_event.c __perf_event_mmap
695 */
696 event->header.misc = PERF_RECORD_MISC_KERNEL;
697 } else {
698 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
699 }
700
701 kmap = map__kmap(map);
702 size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
703 "%s%s", mmap_name, kmap->ref_reloc_sym->name) + 1;
704 size = PERF_ALIGN(size, sizeof(u64));
705 event->mmap.header.type = PERF_RECORD_MMAP;
706 event->mmap.header.size = (sizeof(event->mmap) -
707 (sizeof(event->mmap.filename) - size) + machine->id_hdr_size);
708 event->mmap.pgoff = kmap->ref_reloc_sym->addr;
709 event->mmap.start = map->start;
710 event->mmap.len = map->end - event->mmap.start;
711 event->mmap.pid = machine->pid;
712
713 err = perf_tool__process_synth_event(tool, event, machine, process);
714 free(event);
715
716 return err;
717}
718
719int perf_event__synthesize_thread_map2(struct perf_tool *tool,
720 struct thread_map *threads,
721 perf_event__handler_t process,
722 struct machine *machine)
723{
724 union perf_event *event;
725 int i, err, size;
726
727 size = sizeof(event->thread_map);
728 size += threads->nr * sizeof(event->thread_map.entries[0]);
729
730 event = zalloc(size);
731 if (!event)
732 return -ENOMEM;
733
734 event->header.type = PERF_RECORD_THREAD_MAP;
735 event->header.size = size;
736 event->thread_map.nr = threads->nr;
737
738 for (i = 0; i < threads->nr; i++) {
739 struct thread_map_event_entry *entry = &event->thread_map.entries[i];
740 char *comm = thread_map__comm(threads, i);
741
742 if (!comm)
743 comm = (char *) "";
744
745 entry->pid = thread_map__pid(threads, i);
746 strncpy((char *) &entry->comm, comm, sizeof(entry->comm));
747 }
748
749 err = process(tool, event, NULL, machine);
750
751 free(event);
752 return err;
753}
754
755static void synthesize_cpus(struct cpu_map_entries *cpus,
756 struct cpu_map *map)
757{
758 int i;
759
760 cpus->nr = map->nr;
761
762 for (i = 0; i < map->nr; i++)
763 cpus->cpu[i] = map->map[i];
764}
765
766static void synthesize_mask(struct cpu_map_mask *mask,
767 struct cpu_map *map, int max)
768{
769 int i;
770
771 mask->nr = BITS_TO_LONGS(max);
772 mask->long_size = sizeof(long);
773
774 for (i = 0; i < map->nr; i++)
775 set_bit(map->map[i], mask->mask);
776}
777
778static size_t cpus_size(struct cpu_map *map)
779{
780 return sizeof(struct cpu_map_entries) + map->nr * sizeof(u16);
781}
782
783static size_t mask_size(struct cpu_map *map, int *max)
784{
785 int i;
786
787 *max = 0;
788
789 for (i = 0; i < map->nr; i++) {
790 /* bit possition of the cpu is + 1 */
791 int bit = map->map[i] + 1;
792
793 if (bit > *max)
794 *max = bit;
795 }
796
797 return sizeof(struct cpu_map_mask) + BITS_TO_LONGS(*max) * sizeof(long);
798}
799
800void *cpu_map_data__alloc(struct cpu_map *map, size_t *size, u16 *type, int *max)
801{
802 size_t size_cpus, size_mask;
803 bool is_dummy = cpu_map__empty(map);
804
805 /*
806 * Both array and mask data have variable size based
807 * on the number of cpus and their actual values.
808 * The size of the 'struct cpu_map_data' is:
809 *
810 * array = size of 'struct cpu_map_entries' +
811 * number of cpus * sizeof(u64)
812 *
813 * mask = size of 'struct cpu_map_mask' +
814 * maximum cpu bit converted to size of longs
815 *
816 * and finaly + the size of 'struct cpu_map_data'.
817 */
818 size_cpus = cpus_size(map);
819 size_mask = mask_size(map, max);
820
821 if (is_dummy || (size_cpus < size_mask)) {
822 *size += size_cpus;
823 *type = PERF_CPU_MAP__CPUS;
824 } else {
825 *size += size_mask;
826 *type = PERF_CPU_MAP__MASK;
827 }
828
829 *size += sizeof(struct cpu_map_data);
830 return zalloc(*size);
831}
832
833void cpu_map_data__synthesize(struct cpu_map_data *data, struct cpu_map *map,
834 u16 type, int max)
835{
836 data->type = type;
837
838 switch (type) {
839 case PERF_CPU_MAP__CPUS:
840 synthesize_cpus((struct cpu_map_entries *) data->data, map);
841 break;
842 case PERF_CPU_MAP__MASK:
843 synthesize_mask((struct cpu_map_mask *) data->data, map, max);
844 default:
845 break;
846 };
847}
848
849static struct cpu_map_event* cpu_map_event__new(struct cpu_map *map)
850{
851 size_t size = sizeof(struct cpu_map_event);
852 struct cpu_map_event *event;
853 int max;
854 u16 type;
855
856 event = cpu_map_data__alloc(map, &size, &type, &max);
857 if (!event)
858 return NULL;
859
860 event->header.type = PERF_RECORD_CPU_MAP;
861 event->header.size = size;
862 event->data.type = type;
863
864 cpu_map_data__synthesize(&event->data, map, type, max);
865 return event;
866}
867
868int perf_event__synthesize_cpu_map(struct perf_tool *tool,
869 struct cpu_map *map,
870 perf_event__handler_t process,
871 struct machine *machine)
872{
873 struct cpu_map_event *event;
874 int err;
875
876 event = cpu_map_event__new(map);
877 if (!event)
878 return -ENOMEM;
879
880 err = process(tool, (union perf_event *) event, NULL, machine);
881
882 free(event);
883 return err;
884}
885
886int perf_event__synthesize_stat_config(struct perf_tool *tool,
887 struct perf_stat_config *config,
888 perf_event__handler_t process,
889 struct machine *machine)
890{
891 struct stat_config_event *event;
892 int size, i = 0, err;
893
894 size = sizeof(*event);
895 size += (PERF_STAT_CONFIG_TERM__MAX * sizeof(event->data[0]));
896
897 event = zalloc(size);
898 if (!event)
899 return -ENOMEM;
900
901 event->header.type = PERF_RECORD_STAT_CONFIG;
902 event->header.size = size;
903 event->nr = PERF_STAT_CONFIG_TERM__MAX;
904
905#define ADD(__term, __val) \
906 event->data[i].tag = PERF_STAT_CONFIG_TERM__##__term; \
907 event->data[i].val = __val; \
908 i++;
909
910 ADD(AGGR_MODE, config->aggr_mode)
911 ADD(INTERVAL, config->interval)
912 ADD(SCALE, config->scale)
913
914 WARN_ONCE(i != PERF_STAT_CONFIG_TERM__MAX,
915 "stat config terms unbalanced\n");
916#undef ADD
917
918 err = process(tool, (union perf_event *) event, NULL, machine);
919
920 free(event);
921 return err;
922}
923
924int perf_event__synthesize_stat(struct perf_tool *tool,
925 u32 cpu, u32 thread, u64 id,
926 struct perf_counts_values *count,
927 perf_event__handler_t process,
928 struct machine *machine)
929{
930 struct stat_event event;
931
932 event.header.type = PERF_RECORD_STAT;
933 event.header.size = sizeof(event);
934 event.header.misc = 0;
935
936 event.id = id;
937 event.cpu = cpu;
938 event.thread = thread;
939 event.val = count->val;
940 event.ena = count->ena;
941 event.run = count->run;
942
943 return process(tool, (union perf_event *) &event, NULL, machine);
944}
945
946int perf_event__synthesize_stat_round(struct perf_tool *tool,
947 u64 evtime, u64 type,
948 perf_event__handler_t process,
949 struct machine *machine)
950{
951 struct stat_round_event event;
952
953 event.header.type = PERF_RECORD_STAT_ROUND;
954 event.header.size = sizeof(event);
955 event.header.misc = 0;
956
957 event.time = evtime;
958 event.type = type;
959
960 return process(tool, (union perf_event *) &event, NULL, machine);
961}
962
963void perf_event__read_stat_config(struct perf_stat_config *config,
964 struct stat_config_event *event)
965{
966 unsigned i;
967
968 for (i = 0; i < event->nr; i++) {
969
970 switch (event->data[i].tag) {
971#define CASE(__term, __val) \
972 case PERF_STAT_CONFIG_TERM__##__term: \
973 config->__val = event->data[i].val; \
974 break;
975
976 CASE(AGGR_MODE, aggr_mode)
977 CASE(SCALE, scale)
978 CASE(INTERVAL, interval)
979#undef CASE
980 default:
981 pr_warning("unknown stat config term %" PRIu64 "\n",
982 event->data[i].tag);
983 }
984 }
985}
986
987size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
988{
989 const char *s;
990
991 if (event->header.misc & PERF_RECORD_MISC_COMM_EXEC)
992 s = " exec";
993 else
994 s = "";
995
996 return fprintf(fp, "%s: %s:%d/%d\n", s, event->comm.comm, event->comm.pid, event->comm.tid);
997}
998
999int perf_event__process_comm(struct perf_tool *tool __maybe_unused,
1000 union perf_event *event,
1001 struct perf_sample *sample,
1002 struct machine *machine)
1003{
1004 return machine__process_comm_event(machine, event, sample);
1005}
1006
1007int perf_event__process_lost(struct perf_tool *tool __maybe_unused,
1008 union perf_event *event,
1009 struct perf_sample *sample,
1010 struct machine *machine)
1011{
1012 return machine__process_lost_event(machine, event, sample);
1013}
1014
1015int perf_event__process_aux(struct perf_tool *tool __maybe_unused,
1016 union perf_event *event,
1017 struct perf_sample *sample __maybe_unused,
1018 struct machine *machine)
1019{
1020 return machine__process_aux_event(machine, event);
1021}
1022
1023int perf_event__process_itrace_start(struct perf_tool *tool __maybe_unused,
1024 union perf_event *event,
1025 struct perf_sample *sample __maybe_unused,
1026 struct machine *machine)
1027{
1028 return machine__process_itrace_start_event(machine, event);
1029}
1030
1031int perf_event__process_lost_samples(struct perf_tool *tool __maybe_unused,
1032 union perf_event *event,
1033 struct perf_sample *sample,
1034 struct machine *machine)
1035{
1036 return machine__process_lost_samples_event(machine, event, sample);
1037}
1038
1039int perf_event__process_switch(struct perf_tool *tool __maybe_unused,
1040 union perf_event *event,
1041 struct perf_sample *sample __maybe_unused,
1042 struct machine *machine)
1043{
1044 return machine__process_switch_event(machine, event);
1045}
1046
1047size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
1048{
1049 return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %c %s\n",
1050 event->mmap.pid, event->mmap.tid, event->mmap.start,
1051 event->mmap.len, event->mmap.pgoff,
1052 (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x',
1053 event->mmap.filename);
1054}
1055
1056size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp)
1057{
1058 return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64
1059 " %02x:%02x %"PRIu64" %"PRIu64"]: %c%c%c%c %s\n",
1060 event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
1061 event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj,
1062 event->mmap2.min, event->mmap2.ino,
1063 event->mmap2.ino_generation,
1064 (event->mmap2.prot & PROT_READ) ? 'r' : '-',
1065 (event->mmap2.prot & PROT_WRITE) ? 'w' : '-',
1066 (event->mmap2.prot & PROT_EXEC) ? 'x' : '-',
1067 (event->mmap2.flags & MAP_SHARED) ? 's' : 'p',
1068 event->mmap2.filename);
1069}
1070
1071size_t perf_event__fprintf_thread_map(union perf_event *event, FILE *fp)
1072{
1073 struct thread_map *threads = thread_map__new_event(&event->thread_map);
1074 size_t ret;
1075
1076 ret = fprintf(fp, " nr: ");
1077
1078 if (threads)
1079 ret += thread_map__fprintf(threads, fp);
1080 else
1081 ret += fprintf(fp, "failed to get threads from event\n");
1082
1083 thread_map__put(threads);
1084 return ret;
1085}
1086
1087size_t perf_event__fprintf_cpu_map(union perf_event *event, FILE *fp)
1088{
1089 struct cpu_map *cpus = cpu_map__new_data(&event->cpu_map.data);
1090 size_t ret;
1091
1092 ret = fprintf(fp, " nr: ");
1093
1094 if (cpus)
1095 ret += cpu_map__fprintf(cpus, fp);
1096 else
1097 ret += fprintf(fp, "failed to get cpumap from event\n");
1098
1099 cpu_map__put(cpus);
1100 return ret;
1101}
1102
1103int perf_event__process_mmap(struct perf_tool *tool __maybe_unused,
1104 union perf_event *event,
1105 struct perf_sample *sample,
1106 struct machine *machine)
1107{
1108 return machine__process_mmap_event(machine, event, sample);
1109}
1110
1111int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused,
1112 union perf_event *event,
1113 struct perf_sample *sample,
1114 struct machine *machine)
1115{
1116 return machine__process_mmap2_event(machine, event, sample);
1117}
1118
1119size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
1120{
1121 return fprintf(fp, "(%d:%d):(%d:%d)\n",
1122 event->fork.pid, event->fork.tid,
1123 event->fork.ppid, event->fork.ptid);
1124}
1125
1126int perf_event__process_fork(struct perf_tool *tool __maybe_unused,
1127 union perf_event *event,
1128 struct perf_sample *sample,
1129 struct machine *machine)
1130{
1131 return machine__process_fork_event(machine, event, sample);
1132}
1133
1134int perf_event__process_exit(struct perf_tool *tool __maybe_unused,
1135 union perf_event *event,
1136 struct perf_sample *sample,
1137 struct machine *machine)
1138{
1139 return machine__process_exit_event(machine, event, sample);
1140}
1141
1142size_t perf_event__fprintf_aux(union perf_event *event, FILE *fp)
1143{
1144 return fprintf(fp, " offset: %#"PRIx64" size: %#"PRIx64" flags: %#"PRIx64" [%s%s]\n",
1145 event->aux.aux_offset, event->aux.aux_size,
1146 event->aux.flags,
1147 event->aux.flags & PERF_AUX_FLAG_TRUNCATED ? "T" : "",
1148 event->aux.flags & PERF_AUX_FLAG_OVERWRITE ? "O" : "");
1149}
1150
1151size_t perf_event__fprintf_itrace_start(union perf_event *event, FILE *fp)
1152{
1153 return fprintf(fp, " pid: %u tid: %u\n",
1154 event->itrace_start.pid, event->itrace_start.tid);
1155}
1156
1157size_t perf_event__fprintf_switch(union perf_event *event, FILE *fp)
1158{
1159 bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT;
1160 const char *in_out = out ? "OUT" : "IN ";
1161
1162 if (event->header.type == PERF_RECORD_SWITCH)
1163 return fprintf(fp, " %s\n", in_out);
1164
1165 return fprintf(fp, " %s %s pid/tid: %5u/%-5u\n",
1166 in_out, out ? "next" : "prev",
1167 event->context_switch.next_prev_pid,
1168 event->context_switch.next_prev_tid);
1169}
1170
1171size_t perf_event__fprintf(union perf_event *event, FILE *fp)
1172{
1173 size_t ret = fprintf(fp, "PERF_RECORD_%s",
1174 perf_event__name(event->header.type));
1175
1176 switch (event->header.type) {
1177 case PERF_RECORD_COMM:
1178 ret += perf_event__fprintf_comm(event, fp);
1179 break;
1180 case PERF_RECORD_FORK:
1181 case PERF_RECORD_EXIT:
1182 ret += perf_event__fprintf_task(event, fp);
1183 break;
1184 case PERF_RECORD_MMAP:
1185 ret += perf_event__fprintf_mmap(event, fp);
1186 break;
1187 case PERF_RECORD_MMAP2:
1188 ret += perf_event__fprintf_mmap2(event, fp);
1189 break;
1190 case PERF_RECORD_AUX:
1191 ret += perf_event__fprintf_aux(event, fp);
1192 break;
1193 case PERF_RECORD_ITRACE_START:
1194 ret += perf_event__fprintf_itrace_start(event, fp);
1195 break;
1196 case PERF_RECORD_SWITCH:
1197 case PERF_RECORD_SWITCH_CPU_WIDE:
1198 ret += perf_event__fprintf_switch(event, fp);
1199 break;
1200 default:
1201 ret += fprintf(fp, "\n");
1202 }
1203
1204 return ret;
1205}
1206
1207int perf_event__process(struct perf_tool *tool __maybe_unused,
1208 union perf_event *event,
1209 struct perf_sample *sample,
1210 struct machine *machine)
1211{
1212 return machine__process_event(machine, event, sample);
1213}
1214
1215void thread__find_addr_map(struct thread *thread, u8 cpumode,
1216 enum map_type type, u64 addr,
1217 struct addr_location *al)
1218{
1219 struct map_groups *mg = thread->mg;
1220 struct machine *machine = mg->machine;
1221 bool load_map = false;
1222
1223 al->machine = machine;
1224 al->thread = thread;
1225 al->addr = addr;
1226 al->cpumode = cpumode;
1227 al->filtered = 0;
1228
1229 if (machine == NULL) {
1230 al->map = NULL;
1231 return;
1232 }
1233
1234 if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
1235 al->level = 'k';
1236 mg = &machine->kmaps;
1237 load_map = true;
1238 } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
1239 al->level = '.';
1240 } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
1241 al->level = 'g';
1242 mg = &machine->kmaps;
1243 load_map = true;
1244 } else if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) {
1245 al->level = 'u';
1246 } else {
1247 al->level = 'H';
1248 al->map = NULL;
1249
1250 if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
1251 cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
1252 !perf_guest)
1253 al->filtered |= (1 << HIST_FILTER__GUEST);
1254 if ((cpumode == PERF_RECORD_MISC_USER ||
1255 cpumode == PERF_RECORD_MISC_KERNEL) &&
1256 !perf_host)
1257 al->filtered |= (1 << HIST_FILTER__HOST);
1258
1259 return;
1260 }
1261try_again:
1262 al->map = map_groups__find(mg, type, al->addr);
1263 if (al->map == NULL) {
1264 /*
1265 * If this is outside of all known maps, and is a negative
1266 * address, try to look it up in the kernel dso, as it might be
1267 * a vsyscall or vdso (which executes in user-mode).
1268 *
1269 * XXX This is nasty, we should have a symbol list in the
1270 * "[vdso]" dso, but for now lets use the old trick of looking
1271 * in the whole kernel symbol list.
1272 */
1273 if (cpumode == PERF_RECORD_MISC_USER && machine &&
1274 mg != &machine->kmaps &&
1275 machine__kernel_ip(machine, al->addr)) {
1276 mg = &machine->kmaps;
1277 load_map = true;
1278 goto try_again;
1279 }
1280 } else {
1281 /*
1282 * Kernel maps might be changed when loading symbols so loading
1283 * must be done prior to using kernel maps.
1284 */
1285 if (load_map)
1286 map__load(al->map, machine->symbol_filter);
1287 al->addr = al->map->map_ip(al->map, al->addr);
1288 }
1289}
1290
1291void thread__find_addr_location(struct thread *thread,
1292 u8 cpumode, enum map_type type, u64 addr,
1293 struct addr_location *al)
1294{
1295 thread__find_addr_map(thread, cpumode, type, addr, al);
1296 if (al->map != NULL)
1297 al->sym = map__find_symbol(al->map, al->addr,
1298 thread->mg->machine->symbol_filter);
1299 else
1300 al->sym = NULL;
1301}
1302
1303/*
1304 * Callers need to drop the reference to al->thread, obtained in
1305 * machine__findnew_thread()
1306 */
1307int machine__resolve(struct machine *machine, struct addr_location *al,
1308 struct perf_sample *sample)
1309{
1310 struct thread *thread = machine__findnew_thread(machine, sample->pid,
1311 sample->tid);
1312
1313 if (thread == NULL)
1314 return -1;
1315
1316 dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
1317 /*
1318 * Have we already created the kernel maps for this machine?
1319 *
1320 * This should have happened earlier, when we processed the kernel MMAP
1321 * events, but for older perf.data files there was no such thing, so do
1322 * it now.
1323 */
1324 if (sample->cpumode == PERF_RECORD_MISC_KERNEL &&
1325 machine__kernel_map(machine) == NULL)
1326 machine__create_kernel_maps(machine);
1327
1328 thread__find_addr_map(thread, sample->cpumode, MAP__FUNCTION, sample->ip, al);
1329 dump_printf(" ...... dso: %s\n",
1330 al->map ? al->map->dso->long_name :
1331 al->level == 'H' ? "[hypervisor]" : "<not found>");
1332
1333 if (thread__is_filtered(thread))
1334 al->filtered |= (1 << HIST_FILTER__THREAD);
1335
1336 al->sym = NULL;
1337 al->cpu = sample->cpu;
1338 al->socket = -1;
1339
1340 if (al->cpu >= 0) {
1341 struct perf_env *env = machine->env;
1342
1343 if (env && env->cpu)
1344 al->socket = env->cpu[al->cpu].socket_id;
1345 }
1346
1347 if (al->map) {
1348 struct dso *dso = al->map->dso;
1349
1350 if (symbol_conf.dso_list &&
1351 (!dso || !(strlist__has_entry(symbol_conf.dso_list,
1352 dso->short_name) ||
1353 (dso->short_name != dso->long_name &&
1354 strlist__has_entry(symbol_conf.dso_list,
1355 dso->long_name))))) {
1356 al->filtered |= (1 << HIST_FILTER__DSO);
1357 }
1358
1359 al->sym = map__find_symbol(al->map, al->addr,
1360 machine->symbol_filter);
1361 }
1362
1363 if (symbol_conf.sym_list &&
1364 (!al->sym || !strlist__has_entry(symbol_conf.sym_list,
1365 al->sym->name))) {
1366 al->filtered |= (1 << HIST_FILTER__SYMBOL);
1367 }
1368
1369 return 0;
1370}
1371
1372/*
1373 * The preprocess_sample method will return with reference counts for the
1374 * in it, when done using (and perhaps getting ref counts if needing to
1375 * keep a pointer to one of those entries) it must be paired with
1376 * addr_location__put(), so that the refcounts can be decremented.
1377 */
1378void addr_location__put(struct addr_location *al)
1379{
1380 thread__zput(al->thread);
1381}
1382
1383bool is_bts_event(struct perf_event_attr *attr)
1384{
1385 return attr->type == PERF_TYPE_HARDWARE &&
1386 (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) &&
1387 attr->sample_period == 1;
1388}
1389
1390bool sample_addr_correlates_sym(struct perf_event_attr *attr)
1391{
1392 if (attr->type == PERF_TYPE_SOFTWARE &&
1393 (attr->config == PERF_COUNT_SW_PAGE_FAULTS ||
1394 attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
1395 attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ))
1396 return true;
1397
1398 if (is_bts_event(attr))
1399 return true;
1400
1401 return false;
1402}
1403
1404void thread__resolve(struct thread *thread, struct addr_location *al,
1405 struct perf_sample *sample)
1406{
1407 thread__find_addr_map(thread, sample->cpumode, MAP__FUNCTION, sample->addr, al);
1408 if (!al->map)
1409 thread__find_addr_map(thread, sample->cpumode, MAP__VARIABLE,
1410 sample->addr, al);
1411
1412 al->cpu = sample->cpu;
1413 al->sym = NULL;
1414
1415 if (al->map)
1416 al->sym = map__find_symbol(al->map, al->addr, NULL);
1417}
1#include <linux/types.h>
2#include "event.h"
3#include "debug.h"
4#include "sort.h"
5#include "string.h"
6#include "strlist.h"
7#include "thread.h"
8#include "thread_map.h"
9
10static const char *perf_event__names[] = {
11 [0] = "TOTAL",
12 [PERF_RECORD_MMAP] = "MMAP",
13 [PERF_RECORD_LOST] = "LOST",
14 [PERF_RECORD_COMM] = "COMM",
15 [PERF_RECORD_EXIT] = "EXIT",
16 [PERF_RECORD_THROTTLE] = "THROTTLE",
17 [PERF_RECORD_UNTHROTTLE] = "UNTHROTTLE",
18 [PERF_RECORD_FORK] = "FORK",
19 [PERF_RECORD_READ] = "READ",
20 [PERF_RECORD_SAMPLE] = "SAMPLE",
21 [PERF_RECORD_HEADER_ATTR] = "ATTR",
22 [PERF_RECORD_HEADER_EVENT_TYPE] = "EVENT_TYPE",
23 [PERF_RECORD_HEADER_TRACING_DATA] = "TRACING_DATA",
24 [PERF_RECORD_HEADER_BUILD_ID] = "BUILD_ID",
25 [PERF_RECORD_FINISHED_ROUND] = "FINISHED_ROUND",
26};
27
28const char *perf_event__name(unsigned int id)
29{
30 if (id >= ARRAY_SIZE(perf_event__names))
31 return "INVALID";
32 if (!perf_event__names[id])
33 return "UNKNOWN";
34 return perf_event__names[id];
35}
36
37static struct perf_sample synth_sample = {
38 .pid = -1,
39 .tid = -1,
40 .time = -1,
41 .stream_id = -1,
42 .cpu = -1,
43 .period = 1,
44};
45
46static pid_t perf_event__get_comm_tgid(pid_t pid, char *comm, size_t len)
47{
48 char filename[PATH_MAX];
49 char bf[BUFSIZ];
50 FILE *fp;
51 size_t size = 0;
52 pid_t tgid = -1;
53
54 snprintf(filename, sizeof(filename), "/proc/%d/status", pid);
55
56 fp = fopen(filename, "r");
57 if (fp == NULL) {
58 pr_debug("couldn't open %s\n", filename);
59 return 0;
60 }
61
62 while (!comm[0] || (tgid < 0)) {
63 if (fgets(bf, sizeof(bf), fp) == NULL) {
64 pr_warning("couldn't get COMM and pgid, malformed %s\n",
65 filename);
66 break;
67 }
68
69 if (memcmp(bf, "Name:", 5) == 0) {
70 char *name = bf + 5;
71 while (*name && isspace(*name))
72 ++name;
73 size = strlen(name) - 1;
74 if (size >= len)
75 size = len - 1;
76 memcpy(comm, name, size);
77 comm[size] = '\0';
78
79 } else if (memcmp(bf, "Tgid:", 5) == 0) {
80 char *tgids = bf + 5;
81 while (*tgids && isspace(*tgids))
82 ++tgids;
83 tgid = atoi(tgids);
84 }
85 }
86
87 fclose(fp);
88
89 return tgid;
90}
91
92static pid_t perf_event__synthesize_comm(struct perf_tool *tool,
93 union perf_event *event, pid_t pid,
94 int full,
95 perf_event__handler_t process,
96 struct machine *machine)
97{
98 char filename[PATH_MAX];
99 size_t size;
100 DIR *tasks;
101 struct dirent dirent, *next;
102 pid_t tgid;
103
104 memset(&event->comm, 0, sizeof(event->comm));
105
106 tgid = perf_event__get_comm_tgid(pid, event->comm.comm,
107 sizeof(event->comm.comm));
108 if (tgid < 0)
109 goto out;
110
111 event->comm.pid = tgid;
112 event->comm.header.type = PERF_RECORD_COMM;
113
114 size = strlen(event->comm.comm) + 1;
115 size = ALIGN(size, sizeof(u64));
116 memset(event->comm.comm + size, 0, machine->id_hdr_size);
117 event->comm.header.size = (sizeof(event->comm) -
118 (sizeof(event->comm.comm) - size) +
119 machine->id_hdr_size);
120 if (!full) {
121 event->comm.tid = pid;
122
123 process(tool, event, &synth_sample, machine);
124 goto out;
125 }
126
127 snprintf(filename, sizeof(filename), "/proc/%d/task", pid);
128
129 tasks = opendir(filename);
130 if (tasks == NULL) {
131 pr_debug("couldn't open %s\n", filename);
132 return 0;
133 }
134
135 while (!readdir_r(tasks, &dirent, &next) && next) {
136 char *end;
137 pid = strtol(dirent.d_name, &end, 10);
138 if (*end)
139 continue;
140
141 /* already have tgid; jut want to update the comm */
142 (void) perf_event__get_comm_tgid(pid, event->comm.comm,
143 sizeof(event->comm.comm));
144
145 size = strlen(event->comm.comm) + 1;
146 size = ALIGN(size, sizeof(u64));
147 memset(event->comm.comm + size, 0, machine->id_hdr_size);
148 event->comm.header.size = (sizeof(event->comm) -
149 (sizeof(event->comm.comm) - size) +
150 machine->id_hdr_size);
151
152 event->comm.tid = pid;
153
154 process(tool, event, &synth_sample, machine);
155 }
156
157 closedir(tasks);
158out:
159 return tgid;
160}
161
162static int perf_event__synthesize_mmap_events(struct perf_tool *tool,
163 union perf_event *event,
164 pid_t pid, pid_t tgid,
165 perf_event__handler_t process,
166 struct machine *machine)
167{
168 char filename[PATH_MAX];
169 FILE *fp;
170
171 snprintf(filename, sizeof(filename), "/proc/%d/maps", 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_MMAP;
183 /*
184 * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
185 */
186 event->header.misc = PERF_RECORD_MISC_USER;
187
188 while (1) {
189 char bf[BUFSIZ], *pbf = bf;
190 int n;
191 size_t size;
192 if (fgets(bf, sizeof(bf), fp) == NULL)
193 break;
194
195 /* 00400000-0040c000 r-xp 00000000 fd:01 41038 /bin/cat */
196 n = hex2u64(pbf, &event->mmap.start);
197 if (n < 0)
198 continue;
199 pbf += n + 1;
200 n = hex2u64(pbf, &event->mmap.len);
201 if (n < 0)
202 continue;
203 pbf += n + 3;
204 if (*pbf == 'x') { /* vm_exec */
205 char anonstr[] = "//anon\n";
206 char *execname = strchr(bf, '/');
207
208 /* Catch VDSO */
209 if (execname == NULL)
210 execname = strstr(bf, "[vdso]");
211
212 /* Catch anonymous mmaps */
213 if ((execname == NULL) && !strstr(bf, "["))
214 execname = anonstr;
215
216 if (execname == NULL)
217 continue;
218
219 pbf += 3;
220 n = hex2u64(pbf, &event->mmap.pgoff);
221
222 size = strlen(execname);
223 execname[size - 1] = '\0'; /* Remove \n */
224 memcpy(event->mmap.filename, execname, size);
225 size = ALIGN(size, sizeof(u64));
226 event->mmap.len -= event->mmap.start;
227 event->mmap.header.size = (sizeof(event->mmap) -
228 (sizeof(event->mmap.filename) - size));
229 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
230 event->mmap.header.size += machine->id_hdr_size;
231 event->mmap.pid = tgid;
232 event->mmap.tid = pid;
233
234 process(tool, event, &synth_sample, machine);
235 }
236 }
237
238 fclose(fp);
239 return 0;
240}
241
242int perf_event__synthesize_modules(struct perf_tool *tool,
243 perf_event__handler_t process,
244 struct machine *machine)
245{
246 struct rb_node *nd;
247 struct map_groups *kmaps = &machine->kmaps;
248 union perf_event *event = zalloc((sizeof(event->mmap) +
249 machine->id_hdr_size));
250 if (event == NULL) {
251 pr_debug("Not enough memory synthesizing mmap event "
252 "for kernel modules\n");
253 return -1;
254 }
255
256 event->header.type = PERF_RECORD_MMAP;
257
258 /*
259 * kernel uses 0 for user space maps, see kernel/perf_event.c
260 * __perf_event_mmap
261 */
262 if (machine__is_host(machine))
263 event->header.misc = PERF_RECORD_MISC_KERNEL;
264 else
265 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
266
267 for (nd = rb_first(&kmaps->maps[MAP__FUNCTION]);
268 nd; nd = rb_next(nd)) {
269 size_t size;
270 struct map *pos = rb_entry(nd, struct map, rb_node);
271
272 if (pos->dso->kernel)
273 continue;
274
275 size = ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
276 event->mmap.header.type = PERF_RECORD_MMAP;
277 event->mmap.header.size = (sizeof(event->mmap) -
278 (sizeof(event->mmap.filename) - size));
279 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
280 event->mmap.header.size += machine->id_hdr_size;
281 event->mmap.start = pos->start;
282 event->mmap.len = pos->end - pos->start;
283 event->mmap.pid = machine->pid;
284
285 memcpy(event->mmap.filename, pos->dso->long_name,
286 pos->dso->long_name_len + 1);
287 process(tool, event, &synth_sample, machine);
288 }
289
290 free(event);
291 return 0;
292}
293
294static int __event__synthesize_thread(union perf_event *comm_event,
295 union perf_event *mmap_event,
296 pid_t pid, int full,
297 perf_event__handler_t process,
298 struct perf_tool *tool,
299 struct machine *machine)
300{
301 pid_t tgid = perf_event__synthesize_comm(tool, comm_event, pid, full,
302 process, machine);
303 if (tgid == -1)
304 return -1;
305 return perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
306 process, machine);
307}
308
309int perf_event__synthesize_thread_map(struct perf_tool *tool,
310 struct thread_map *threads,
311 perf_event__handler_t process,
312 struct machine *machine)
313{
314 union perf_event *comm_event, *mmap_event;
315 int err = -1, thread, j;
316
317 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
318 if (comm_event == NULL)
319 goto out;
320
321 mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size);
322 if (mmap_event == NULL)
323 goto out_free_comm;
324
325 err = 0;
326 for (thread = 0; thread < threads->nr; ++thread) {
327 if (__event__synthesize_thread(comm_event, mmap_event,
328 threads->map[thread], 0,
329 process, tool, machine)) {
330 err = -1;
331 break;
332 }
333
334 /*
335 * comm.pid is set to thread group id by
336 * perf_event__synthesize_comm
337 */
338 if ((int) comm_event->comm.pid != threads->map[thread]) {
339 bool need_leader = true;
340
341 /* is thread group leader in thread_map? */
342 for (j = 0; j < threads->nr; ++j) {
343 if ((int) comm_event->comm.pid == threads->map[j]) {
344 need_leader = false;
345 break;
346 }
347 }
348
349 /* if not, generate events for it */
350 if (need_leader &&
351 __event__synthesize_thread(comm_event,
352 mmap_event,
353 comm_event->comm.pid, 0,
354 process, tool, machine)) {
355 err = -1;
356 break;
357 }
358 }
359 }
360 free(mmap_event);
361out_free_comm:
362 free(comm_event);
363out:
364 return err;
365}
366
367int perf_event__synthesize_threads(struct perf_tool *tool,
368 perf_event__handler_t process,
369 struct machine *machine)
370{
371 DIR *proc;
372 struct dirent dirent, *next;
373 union perf_event *comm_event, *mmap_event;
374 int err = -1;
375
376 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
377 if (comm_event == NULL)
378 goto out;
379
380 mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size);
381 if (mmap_event == NULL)
382 goto out_free_comm;
383
384 proc = opendir("/proc");
385 if (proc == NULL)
386 goto out_free_mmap;
387
388 while (!readdir_r(proc, &dirent, &next) && next) {
389 char *end;
390 pid_t pid = strtol(dirent.d_name, &end, 10);
391
392 if (*end) /* only interested in proper numerical dirents */
393 continue;
394
395 __event__synthesize_thread(comm_event, mmap_event, pid, 1,
396 process, tool, machine);
397 }
398
399 closedir(proc);
400 err = 0;
401out_free_mmap:
402 free(mmap_event);
403out_free_comm:
404 free(comm_event);
405out:
406 return err;
407}
408
409struct process_symbol_args {
410 const char *name;
411 u64 start;
412};
413
414static int find_symbol_cb(void *arg, const char *name, char type,
415 u64 start, u64 end __used)
416{
417 struct process_symbol_args *args = arg;
418
419 /*
420 * Must be a function or at least an alias, as in PARISC64, where "_text" is
421 * an 'A' to the same address as "_stext".
422 */
423 if (!(symbol_type__is_a(type, MAP__FUNCTION) ||
424 type == 'A') || strcmp(name, args->name))
425 return 0;
426
427 args->start = start;
428 return 1;
429}
430
431int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
432 perf_event__handler_t process,
433 struct machine *machine,
434 const char *symbol_name)
435{
436 size_t size;
437 const char *filename, *mmap_name;
438 char path[PATH_MAX];
439 char name_buff[PATH_MAX];
440 struct map *map;
441 int err;
442 /*
443 * We should get this from /sys/kernel/sections/.text, but till that is
444 * available use this, and after it is use this as a fallback for older
445 * kernels.
446 */
447 struct process_symbol_args args = { .name = symbol_name, };
448 union perf_event *event = zalloc((sizeof(event->mmap) +
449 machine->id_hdr_size));
450 if (event == NULL) {
451 pr_debug("Not enough memory synthesizing mmap event "
452 "for kernel modules\n");
453 return -1;
454 }
455
456 mmap_name = machine__mmap_name(machine, name_buff, sizeof(name_buff));
457 if (machine__is_host(machine)) {
458 /*
459 * kernel uses PERF_RECORD_MISC_USER for user space maps,
460 * see kernel/perf_event.c __perf_event_mmap
461 */
462 event->header.misc = PERF_RECORD_MISC_KERNEL;
463 filename = "/proc/kallsyms";
464 } else {
465 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
466 if (machine__is_default_guest(machine))
467 filename = (char *) symbol_conf.default_guest_kallsyms;
468 else {
469 sprintf(path, "%s/proc/kallsyms", machine->root_dir);
470 filename = path;
471 }
472 }
473
474 if (kallsyms__parse(filename, &args, find_symbol_cb) <= 0)
475 return -ENOENT;
476
477 map = machine->vmlinux_maps[MAP__FUNCTION];
478 size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
479 "%s%s", mmap_name, symbol_name) + 1;
480 size = ALIGN(size, sizeof(u64));
481 event->mmap.header.type = PERF_RECORD_MMAP;
482 event->mmap.header.size = (sizeof(event->mmap) -
483 (sizeof(event->mmap.filename) - size) + machine->id_hdr_size);
484 event->mmap.pgoff = args.start;
485 event->mmap.start = map->start;
486 event->mmap.len = map->end - event->mmap.start;
487 event->mmap.pid = machine->pid;
488
489 err = process(tool, event, &synth_sample, machine);
490 free(event);
491
492 return err;
493}
494
495size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
496{
497 return fprintf(fp, ": %s:%d\n", event->comm.comm, event->comm.tid);
498}
499
500int perf_event__process_comm(struct perf_tool *tool __used,
501 union perf_event *event,
502 struct perf_sample *sample __used,
503 struct machine *machine)
504{
505 struct thread *thread = machine__findnew_thread(machine, event->comm.tid);
506
507 if (dump_trace)
508 perf_event__fprintf_comm(event, stdout);
509
510 if (thread == NULL || thread__set_comm(thread, event->comm.comm)) {
511 dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n");
512 return -1;
513 }
514
515 return 0;
516}
517
518int perf_event__process_lost(struct perf_tool *tool __used,
519 union perf_event *event,
520 struct perf_sample *sample __used,
521 struct machine *machine __used)
522{
523 dump_printf(": id:%" PRIu64 ": lost:%" PRIu64 "\n",
524 event->lost.id, event->lost.lost);
525 return 0;
526}
527
528static void perf_event__set_kernel_mmap_len(union perf_event *event,
529 struct map **maps)
530{
531 maps[MAP__FUNCTION]->start = event->mmap.start;
532 maps[MAP__FUNCTION]->end = event->mmap.start + event->mmap.len;
533 /*
534 * Be a bit paranoid here, some perf.data file came with
535 * a zero sized synthesized MMAP event for the kernel.
536 */
537 if (maps[MAP__FUNCTION]->end == 0)
538 maps[MAP__FUNCTION]->end = ~0ULL;
539}
540
541static int perf_event__process_kernel_mmap(struct perf_tool *tool __used,
542 union perf_event *event,
543 struct machine *machine)
544{
545 struct map *map;
546 char kmmap_prefix[PATH_MAX];
547 enum dso_kernel_type kernel_type;
548 bool is_kernel_mmap;
549
550 machine__mmap_name(machine, kmmap_prefix, sizeof(kmmap_prefix));
551 if (machine__is_host(machine))
552 kernel_type = DSO_TYPE_KERNEL;
553 else
554 kernel_type = DSO_TYPE_GUEST_KERNEL;
555
556 is_kernel_mmap = memcmp(event->mmap.filename,
557 kmmap_prefix,
558 strlen(kmmap_prefix) - 1) == 0;
559 if (event->mmap.filename[0] == '/' ||
560 (!is_kernel_mmap && event->mmap.filename[0] == '[')) {
561
562 char short_module_name[1024];
563 char *name, *dot;
564
565 if (event->mmap.filename[0] == '/') {
566 name = strrchr(event->mmap.filename, '/');
567 if (name == NULL)
568 goto out_problem;
569
570 ++name; /* skip / */
571 dot = strrchr(name, '.');
572 if (dot == NULL)
573 goto out_problem;
574 snprintf(short_module_name, sizeof(short_module_name),
575 "[%.*s]", (int)(dot - name), name);
576 strxfrchar(short_module_name, '-', '_');
577 } else
578 strcpy(short_module_name, event->mmap.filename);
579
580 map = machine__new_module(machine, event->mmap.start,
581 event->mmap.filename);
582 if (map == NULL)
583 goto out_problem;
584
585 name = strdup(short_module_name);
586 if (name == NULL)
587 goto out_problem;
588
589 map->dso->short_name = name;
590 map->dso->sname_alloc = 1;
591 map->end = map->start + event->mmap.len;
592 } else if (is_kernel_mmap) {
593 const char *symbol_name = (event->mmap.filename +
594 strlen(kmmap_prefix));
595 /*
596 * Should be there already, from the build-id table in
597 * the header.
598 */
599 struct dso *kernel = __dsos__findnew(&machine->kernel_dsos,
600 kmmap_prefix);
601 if (kernel == NULL)
602 goto out_problem;
603
604 kernel->kernel = kernel_type;
605 if (__machine__create_kernel_maps(machine, kernel) < 0)
606 goto out_problem;
607
608 perf_event__set_kernel_mmap_len(event, machine->vmlinux_maps);
609
610 /*
611 * Avoid using a zero address (kptr_restrict) for the ref reloc
612 * symbol. Effectively having zero here means that at record
613 * time /proc/sys/kernel/kptr_restrict was non zero.
614 */
615 if (event->mmap.pgoff != 0) {
616 maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps,
617 symbol_name,
618 event->mmap.pgoff);
619 }
620
621 if (machine__is_default_guest(machine)) {
622 /*
623 * preload dso of guest kernel and modules
624 */
625 dso__load(kernel, machine->vmlinux_maps[MAP__FUNCTION],
626 NULL);
627 }
628 }
629 return 0;
630out_problem:
631 return -1;
632}
633
634size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
635{
636 return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %s\n",
637 event->mmap.pid, event->mmap.tid, event->mmap.start,
638 event->mmap.len, event->mmap.pgoff, event->mmap.filename);
639}
640
641int perf_event__process_mmap(struct perf_tool *tool,
642 union perf_event *event,
643 struct perf_sample *sample __used,
644 struct machine *machine)
645{
646 struct thread *thread;
647 struct map *map;
648 u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
649 int ret = 0;
650
651 if (dump_trace)
652 perf_event__fprintf_mmap(event, stdout);
653
654 if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL ||
655 cpumode == PERF_RECORD_MISC_KERNEL) {
656 ret = perf_event__process_kernel_mmap(tool, event, machine);
657 if (ret < 0)
658 goto out_problem;
659 return 0;
660 }
661
662 thread = machine__findnew_thread(machine, event->mmap.pid);
663 if (thread == NULL)
664 goto out_problem;
665 map = map__new(&machine->user_dsos, event->mmap.start,
666 event->mmap.len, event->mmap.pgoff,
667 event->mmap.pid, event->mmap.filename,
668 MAP__FUNCTION);
669 if (map == NULL)
670 goto out_problem;
671
672 thread__insert_map(thread, map);
673 return 0;
674
675out_problem:
676 dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n");
677 return 0;
678}
679
680size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
681{
682 return fprintf(fp, "(%d:%d):(%d:%d)\n",
683 event->fork.pid, event->fork.tid,
684 event->fork.ppid, event->fork.ptid);
685}
686
687int perf_event__process_task(struct perf_tool *tool __used,
688 union perf_event *event,
689 struct perf_sample *sample __used,
690 struct machine *machine)
691{
692 struct thread *thread = machine__findnew_thread(machine, event->fork.tid);
693 struct thread *parent = machine__findnew_thread(machine, event->fork.ptid);
694
695 if (dump_trace)
696 perf_event__fprintf_task(event, stdout);
697
698 if (event->header.type == PERF_RECORD_EXIT) {
699 machine__remove_thread(machine, thread);
700 return 0;
701 }
702
703 if (thread == NULL || parent == NULL ||
704 thread__fork(thread, parent) < 0) {
705 dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n");
706 return -1;
707 }
708
709 return 0;
710}
711
712size_t perf_event__fprintf(union perf_event *event, FILE *fp)
713{
714 size_t ret = fprintf(fp, "PERF_RECORD_%s",
715 perf_event__name(event->header.type));
716
717 switch (event->header.type) {
718 case PERF_RECORD_COMM:
719 ret += perf_event__fprintf_comm(event, fp);
720 break;
721 case PERF_RECORD_FORK:
722 case PERF_RECORD_EXIT:
723 ret += perf_event__fprintf_task(event, fp);
724 break;
725 case PERF_RECORD_MMAP:
726 ret += perf_event__fprintf_mmap(event, fp);
727 break;
728 default:
729 ret += fprintf(fp, "\n");
730 }
731
732 return ret;
733}
734
735int perf_event__process(struct perf_tool *tool, union perf_event *event,
736 struct perf_sample *sample, struct machine *machine)
737{
738 switch (event->header.type) {
739 case PERF_RECORD_COMM:
740 perf_event__process_comm(tool, event, sample, machine);
741 break;
742 case PERF_RECORD_MMAP:
743 perf_event__process_mmap(tool, event, sample, machine);
744 break;
745 case PERF_RECORD_FORK:
746 case PERF_RECORD_EXIT:
747 perf_event__process_task(tool, event, sample, machine);
748 break;
749 case PERF_RECORD_LOST:
750 perf_event__process_lost(tool, event, sample, machine);
751 default:
752 break;
753 }
754
755 return 0;
756}
757
758void thread__find_addr_map(struct thread *self,
759 struct machine *machine, u8 cpumode,
760 enum map_type type, u64 addr,
761 struct addr_location *al)
762{
763 struct map_groups *mg = &self->mg;
764
765 al->thread = self;
766 al->addr = addr;
767 al->cpumode = cpumode;
768 al->filtered = false;
769
770 if (machine == NULL) {
771 al->map = NULL;
772 return;
773 }
774
775 if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
776 al->level = 'k';
777 mg = &machine->kmaps;
778 } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
779 al->level = '.';
780 } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
781 al->level = 'g';
782 mg = &machine->kmaps;
783 } else {
784 /*
785 * 'u' means guest os user space.
786 * TODO: We don't support guest user space. Might support late.
787 */
788 if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest)
789 al->level = 'u';
790 else
791 al->level = 'H';
792 al->map = NULL;
793
794 if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
795 cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
796 !perf_guest)
797 al->filtered = true;
798 if ((cpumode == PERF_RECORD_MISC_USER ||
799 cpumode == PERF_RECORD_MISC_KERNEL) &&
800 !perf_host)
801 al->filtered = true;
802
803 return;
804 }
805try_again:
806 al->map = map_groups__find(mg, type, al->addr);
807 if (al->map == NULL) {
808 /*
809 * If this is outside of all known maps, and is a negative
810 * address, try to look it up in the kernel dso, as it might be
811 * a vsyscall or vdso (which executes in user-mode).
812 *
813 * XXX This is nasty, we should have a symbol list in the
814 * "[vdso]" dso, but for now lets use the old trick of looking
815 * in the whole kernel symbol list.
816 */
817 if ((long long)al->addr < 0 &&
818 cpumode == PERF_RECORD_MISC_USER &&
819 machine && mg != &machine->kmaps) {
820 mg = &machine->kmaps;
821 goto try_again;
822 }
823 } else
824 al->addr = al->map->map_ip(al->map, al->addr);
825}
826
827void thread__find_addr_location(struct thread *thread, struct machine *machine,
828 u8 cpumode, enum map_type type, u64 addr,
829 struct addr_location *al,
830 symbol_filter_t filter)
831{
832 thread__find_addr_map(thread, machine, cpumode, type, addr, al);
833 if (al->map != NULL)
834 al->sym = map__find_symbol(al->map, al->addr, filter);
835 else
836 al->sym = NULL;
837}
838
839int perf_event__preprocess_sample(const union perf_event *event,
840 struct machine *machine,
841 struct addr_location *al,
842 struct perf_sample *sample,
843 symbol_filter_t filter)
844{
845 u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
846 struct thread *thread = machine__findnew_thread(machine, event->ip.pid);
847
848 if (thread == NULL)
849 return -1;
850
851 if (symbol_conf.comm_list &&
852 !strlist__has_entry(symbol_conf.comm_list, thread->comm))
853 goto out_filtered;
854
855 dump_printf(" ... thread: %s:%d\n", thread->comm, thread->pid);
856 /*
857 * Have we already created the kernel maps for this machine?
858 *
859 * This should have happened earlier, when we processed the kernel MMAP
860 * events, but for older perf.data files there was no such thing, so do
861 * it now.
862 */
863 if (cpumode == PERF_RECORD_MISC_KERNEL &&
864 machine->vmlinux_maps[MAP__FUNCTION] == NULL)
865 machine__create_kernel_maps(machine);
866
867 thread__find_addr_map(thread, machine, cpumode, MAP__FUNCTION,
868 event->ip.ip, al);
869 dump_printf(" ...... dso: %s\n",
870 al->map ? al->map->dso->long_name :
871 al->level == 'H' ? "[hypervisor]" : "<not found>");
872 al->sym = NULL;
873 al->cpu = sample->cpu;
874
875 if (al->map) {
876 struct dso *dso = al->map->dso;
877
878 if (symbol_conf.dso_list &&
879 (!dso || !(strlist__has_entry(symbol_conf.dso_list,
880 dso->short_name) ||
881 (dso->short_name != dso->long_name &&
882 strlist__has_entry(symbol_conf.dso_list,
883 dso->long_name)))))
884 goto out_filtered;
885
886 al->sym = map__find_symbol(al->map, al->addr, filter);
887 }
888
889 if (symbol_conf.sym_list && al->sym &&
890 !strlist__has_entry(symbol_conf.sym_list, al->sym->name))
891 goto out_filtered;
892
893 return 0;
894
895out_filtered:
896 al->filtered = true;
897 return 0;
898}