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Linux 4.19.133
[linux/fpc-iii.git] / tools / perf / util / event.c
blobaa9c7df120cae92fafcf83cf758d6ebadb431278
1 // SPDX-License-Identifier: GPL-2.0
2 #include <dirent.h>
3 #include <errno.h>
4 #include <fcntl.h>
5 #include <inttypes.h>
6 #include <linux/kernel.h>
7 #include <linux/types.h>
8 #include <sys/types.h>
9 #include <sys/stat.h>
10 #include <unistd.h>
11 #include <uapi/linux/mman.h> /* To get things like MAP_HUGETLB even on older libc headers */
12 #include <api/fs/fs.h>
13 #include <linux/perf_event.h>
14 #include "event.h"
15 #include "debug.h"
16 #include "hist.h"
17 #include "machine.h"
18 #include "sort.h"
19 #include "string2.h"
20 #include "strlist.h"
21 #include "thread.h"
22 #include "thread_map.h"
23 #include "sane_ctype.h"
24 #include "symbol/kallsyms.h"
25 #include "asm/bug.h"
26 #include "stat.h"
27
28 static const char *perf_event__names[] = {
29 [0] = "TOTAL",
30 [PERF_RECORD_MMAP] = "MMAP",
31 [PERF_RECORD_MMAP2] = "MMAP2",
32 [PERF_RECORD_LOST] = "LOST",
33 [PERF_RECORD_COMM] = "COMM",
34 [PERF_RECORD_EXIT] = "EXIT",
35 [PERF_RECORD_THROTTLE] = "THROTTLE",
36 [PERF_RECORD_UNTHROTTLE] = "UNTHROTTLE",
37 [PERF_RECORD_FORK] = "FORK",
38 [PERF_RECORD_READ] = "READ",
39 [PERF_RECORD_SAMPLE] = "SAMPLE",
40 [PERF_RECORD_AUX] = "AUX",
41 [PERF_RECORD_ITRACE_START] = "ITRACE_START",
42 [PERF_RECORD_LOST_SAMPLES] = "LOST_SAMPLES",
43 [PERF_RECORD_SWITCH] = "SWITCH",
44 [PERF_RECORD_SWITCH_CPU_WIDE] = "SWITCH_CPU_WIDE",
45 [PERF_RECORD_NAMESPACES] = "NAMESPACES",
46 [PERF_RECORD_HEADER_ATTR] = "ATTR",
47 [PERF_RECORD_HEADER_EVENT_TYPE] = "EVENT_TYPE",
48 [PERF_RECORD_HEADER_TRACING_DATA] = "TRACING_DATA",
49 [PERF_RECORD_HEADER_BUILD_ID] = "BUILD_ID",
50 [PERF_RECORD_FINISHED_ROUND] = "FINISHED_ROUND",
51 [PERF_RECORD_ID_INDEX] = "ID_INDEX",
52 [PERF_RECORD_AUXTRACE_INFO] = "AUXTRACE_INFO",
53 [PERF_RECORD_AUXTRACE] = "AUXTRACE",
54 [PERF_RECORD_AUXTRACE_ERROR] = "AUXTRACE_ERROR",
55 [PERF_RECORD_THREAD_MAP] = "THREAD_MAP",
56 [PERF_RECORD_CPU_MAP] = "CPU_MAP",
57 [PERF_RECORD_STAT_CONFIG] = "STAT_CONFIG",
58 [PERF_RECORD_STAT] = "STAT",
59 [PERF_RECORD_STAT_ROUND] = "STAT_ROUND",
60 [PERF_RECORD_EVENT_UPDATE] = "EVENT_UPDATE",
61 [PERF_RECORD_TIME_CONV] = "TIME_CONV",
62 [PERF_RECORD_HEADER_FEATURE] = "FEATURE",
63 };
64
65 static const char *perf_ns__names[] = {
66 [NET_NS_INDEX] = "net",
67 [UTS_NS_INDEX] = "uts",
68 [IPC_NS_INDEX] = "ipc",
69 [PID_NS_INDEX] = "pid",
70 [USER_NS_INDEX] = "user",
71 [MNT_NS_INDEX] = "mnt",
72 [CGROUP_NS_INDEX] = "cgroup",
73 };
74
75 const char *perf_event__name(unsigned int id)
76 {
77 if (id >= ARRAY_SIZE(perf_event__names))
78 return "INVALID";
79 if (!perf_event__names[id])
80 return "UNKNOWN";
81 return perf_event__names[id];
82 }
83
84 static const char *perf_ns__name(unsigned int id)
85 {
86 if (id >= ARRAY_SIZE(perf_ns__names))
87 return "UNKNOWN";
88 return perf_ns__names[id];
89 }
90
91 int perf_tool__process_synth_event(struct perf_tool *tool,
92 union perf_event *event,
93 struct machine *machine,
94 perf_event__handler_t process)
95 {
96 struct perf_sample synth_sample = {
97 .pid = -1,
98 .tid = -1,
99 .time = -1,
100 .stream_id = -1,
101 .cpu = -1,
102 .period = 1,
103 .cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK,
104 };
105
106 return process(tool, event, &synth_sample, machine);
107 };
108
109 /*
110 * Assumes that the first 4095 bytes of /proc/pid/stat contains
111 * the comm, tgid and ppid.
112 */
113 static int perf_event__get_comm_ids(pid_t pid, char *comm, size_t len,
114 pid_t *tgid, pid_t *ppid)
115 {
116 char filename[PATH_MAX];
117 char bf[4096];
118 int fd;
119 size_t size = 0;
120 ssize_t n;
121 char *name, *tgids, *ppids;
122
123 *tgid = -1;
124 *ppid = -1;
125
126 snprintf(filename, sizeof(filename), "/proc/%d/status", pid);
127
128 fd = open(filename, O_RDONLY);
129 if (fd < 0) {
130 pr_debug("couldn't open %s\n", filename);
131 return -1;
132 }
133
134 n = read(fd, bf, sizeof(bf) - 1);
135 close(fd);
136 if (n <= 0) {
137 pr_warning("Couldn't get COMM, tigd and ppid for pid %d\n",
138 pid);
139 return -1;
140 }
141 bf[n] = '\0';
142
143 name = strstr(bf, "Name:");
144 tgids = strstr(bf, "Tgid:");
145 ppids = strstr(bf, "PPid:");
146
147 if (name) {
148 char *nl;
149
150 name += 5; /* strlen("Name:") */
151 name = ltrim(name);
152
153 nl = strchr(name, '\n');
154 if (nl)
155 *nl = '\0';
156
157 size = strlen(name);
158 if (size >= len)
159 size = len - 1;
160 memcpy(comm, name, size);
161 comm[size] = '\0';
162 } else {
163 pr_debug("Name: string not found for pid %d\n", pid);
164 }
165
166 if (tgids) {
167 tgids += 5; /* strlen("Tgid:") */
168 *tgid = atoi(tgids);
169 } else {
170 pr_debug("Tgid: string not found for pid %d\n", pid);
171 }
172
173 if (ppids) {
174 ppids += 5; /* strlen("PPid:") */
175 *ppid = atoi(ppids);
176 } else {
177 pr_debug("PPid: string not found for pid %d\n", pid);
178 }
179
180 return 0;
181 }
182
183 static int perf_event__prepare_comm(union perf_event *event, pid_t pid,
184 struct machine *machine,
185 pid_t *tgid, pid_t *ppid)
186 {
187 size_t size;
188
189 *ppid = -1;
190
191 memset(&event->comm, 0, sizeof(event->comm));
192
193 if (machine__is_host(machine)) {
194 if (perf_event__get_comm_ids(pid, event->comm.comm,
195 sizeof(event->comm.comm),
196 tgid, ppid) != 0) {
197 return -1;
198 }
199 } else {
200 *tgid = machine->pid;
201 }
202
203 if (*tgid < 0)
204 return -1;
205
206 event->comm.pid = *tgid;
207 event->comm.header.type = PERF_RECORD_COMM;
208
209 size = strlen(event->comm.comm) + 1;
210 size = PERF_ALIGN(size, sizeof(u64));
211 memset(event->comm.comm + size, 0, machine->id_hdr_size);
212 event->comm.header.size = (sizeof(event->comm) -
213 (sizeof(event->comm.comm) - size) +
214 machine->id_hdr_size);
215 event->comm.tid = pid;
216
217 return 0;
218 }
219
220 pid_t perf_event__synthesize_comm(struct perf_tool *tool,
221 union perf_event *event, pid_t pid,
222 perf_event__handler_t process,
223 struct machine *machine)
224 {
225 pid_t tgid, ppid;
226
227 if (perf_event__prepare_comm(event, pid, machine, &tgid, &ppid) != 0)
228 return -1;
229
230 if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
231 return -1;
232
233 return tgid;
234 }
235
236 static void perf_event__get_ns_link_info(pid_t pid, const char *ns,
237 struct perf_ns_link_info *ns_link_info)
238 {
239 struct stat64 st;
240 char proc_ns[128];
241
242 sprintf(proc_ns, "/proc/%u/ns/%s", pid, ns);
243 if (stat64(proc_ns, &st) == 0) {
244 ns_link_info->dev = st.st_dev;
245 ns_link_info->ino = st.st_ino;
246 }
247 }
248
249 int perf_event__synthesize_namespaces(struct perf_tool *tool,
250 union perf_event *event,
251 pid_t pid, pid_t tgid,
252 perf_event__handler_t process,
253 struct machine *machine)
254 {
255 u32 idx;
256 struct perf_ns_link_info *ns_link_info;
257
258 if (!tool || !tool->namespace_events)
259 return 0;
260
261 memset(&event->namespaces, 0, (sizeof(event->namespaces) +
262 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
263 machine->id_hdr_size));
264
265 event->namespaces.pid = tgid;
266 event->namespaces.tid = pid;
267
268 event->namespaces.nr_namespaces = NR_NAMESPACES;
269
270 ns_link_info = event->namespaces.link_info;
271
272 for (idx = 0; idx < event->namespaces.nr_namespaces; idx++)
273 perf_event__get_ns_link_info(pid, perf_ns__name(idx),
274 &ns_link_info[idx]);
275
276 event->namespaces.header.type = PERF_RECORD_NAMESPACES;
277
278 event->namespaces.header.size = (sizeof(event->namespaces) +
279 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
280 machine->id_hdr_size);
281
282 if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
283 return -1;
284
285 return 0;
286 }
287
288 static int perf_event__synthesize_fork(struct perf_tool *tool,
289 union perf_event *event,
290 pid_t pid, pid_t tgid, pid_t ppid,
291 perf_event__handler_t process,
292 struct machine *machine)
293 {
294 memset(&event->fork, 0, sizeof(event->fork) + machine->id_hdr_size);
295
296 /*
297 * for main thread set parent to ppid from status file. For other
298 * threads set parent pid to main thread. ie., assume main thread
299 * spawns all threads in a process
300 */
301 if (tgid == pid) {
302 event->fork.ppid = ppid;
303 event->fork.ptid = ppid;
304 } else {
305 event->fork.ppid = tgid;
306 event->fork.ptid = tgid;
307 }
308 event->fork.pid = tgid;
309 event->fork.tid = pid;
310 event->fork.header.type = PERF_RECORD_FORK;
311
312 event->fork.header.size = (sizeof(event->fork) + machine->id_hdr_size);
313
314 if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
315 return -1;
316
317 return 0;
318 }
319
320 int perf_event__synthesize_mmap_events(struct perf_tool *tool,
321 union perf_event *event,
322 pid_t pid, pid_t tgid,
323 perf_event__handler_t process,
324 struct machine *machine,
325 bool mmap_data,
326 unsigned int proc_map_timeout)
327 {
328 char filename[PATH_MAX];
329 FILE *fp;
330 unsigned long long t;
331 bool truncation = false;
332 unsigned long long timeout = proc_map_timeout * 1000000ULL;
333 int rc = 0;
334 const char *hugetlbfs_mnt = hugetlbfs__mountpoint();
335 int hugetlbfs_mnt_len = hugetlbfs_mnt ? strlen(hugetlbfs_mnt) : 0;
336
337 if (machine__is_default_guest(machine))
338 return 0;
339
340 snprintf(filename, sizeof(filename), "%s/proc/%d/task/%d/maps",
341 machine->root_dir, pid, pid);
342
343 fp = fopen(filename, "r");
344 if (fp == NULL) {
345 /*
346 * We raced with a task exiting - just return:
347 */
348 pr_debug("couldn't open %s\n", filename);
349 return -1;
350 }
351
352 event->header.type = PERF_RECORD_MMAP2;
353 t = rdclock();
354
355 while (1) {
356 char bf[BUFSIZ];
357 char prot[5];
358 char execname[PATH_MAX];
359 char anonstr[] = "//anon";
360 unsigned int ino;
361 size_t size;
362 ssize_t n;
363
364 if (fgets(bf, sizeof(bf), fp) == NULL)
365 break;
366
367 if ((rdclock() - t) > timeout) {
368 pr_warning("Reading %s time out. "
369 "You may want to increase "
370 "the time limit by --proc-map-timeout\n",
371 filename);
372 truncation = true;
373 goto out;
374 }
375
376 /* ensure null termination since stack will be reused. */
377 strcpy(execname, "");
378
379 /* 00400000-0040c000 r-xp 00000000 fd:01 41038 /bin/cat */
380 n = sscanf(bf, "%"PRIx64"-%"PRIx64" %s %"PRIx64" %x:%x %u %[^\n]\n",
381 &event->mmap2.start, &event->mmap2.len, prot,
382 &event->mmap2.pgoff, &event->mmap2.maj,
383 &event->mmap2.min,
384 &ino, execname);
385
386 /*
387 * Anon maps don't have the execname.
388 */
389 if (n < 7)
390 continue;
391
392 event->mmap2.ino = (u64)ino;
393
394 /*
395 * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
396 */
397 if (machine__is_host(machine))
398 event->header.misc = PERF_RECORD_MISC_USER;
399 else
400 event->header.misc = PERF_RECORD_MISC_GUEST_USER;
401
402 /* map protection and flags bits */
403 event->mmap2.prot = 0;
404 event->mmap2.flags = 0;
405 if (prot[0] == 'r')
406 event->mmap2.prot |= PROT_READ;
407 if (prot[1] == 'w')
408 event->mmap2.prot |= PROT_WRITE;
409 if (prot[2] == 'x')
410 event->mmap2.prot |= PROT_EXEC;
411
412 if (prot[3] == 's')
413 event->mmap2.flags |= MAP_SHARED;
414 else
415 event->mmap2.flags |= MAP_PRIVATE;
416
417 if (prot[2] != 'x') {
418 if (!mmap_data || prot[0] != 'r')
419 continue;
420
421 event->header.misc |= PERF_RECORD_MISC_MMAP_DATA;
422 }
423
424 out:
425 if (truncation)
426 event->header.misc |= PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT;
427
428 if (!strcmp(execname, ""))
429 strcpy(execname, anonstr);
430
431 if (hugetlbfs_mnt_len &&
432 !strncmp(execname, hugetlbfs_mnt, hugetlbfs_mnt_len)) {
433 strcpy(execname, anonstr);
434 event->mmap2.flags |= MAP_HUGETLB;
435 }
436
437 size = strlen(execname) + 1;
438 memcpy(event->mmap2.filename, execname, size);
439 size = PERF_ALIGN(size, sizeof(u64));
440 event->mmap2.len -= event->mmap.start;
441 event->mmap2.header.size = (sizeof(event->mmap2) -
442 (sizeof(event->mmap2.filename) - size));
443 memset(event->mmap2.filename + size, 0, machine->id_hdr_size);
444 event->mmap2.header.size += machine->id_hdr_size;
445 event->mmap2.pid = tgid;
446 event->mmap2.tid = pid;
447
448 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
449 rc = -1;
450 break;
451 }
452
453 if (truncation)
454 break;
455 }
456
457 fclose(fp);
458 return rc;
459 }
460
461 int perf_event__synthesize_modules(struct perf_tool *tool,
462 perf_event__handler_t process,
463 struct machine *machine)
464 {
465 int rc = 0;
466 struct map *pos;
467 struct maps *maps = machine__kernel_maps(machine);
468 union perf_event *event = zalloc((sizeof(event->mmap) +
469 machine->id_hdr_size));
470 if (event == NULL) {
471 pr_debug("Not enough memory synthesizing mmap event "
472 "for kernel modules\n");
473 return -1;
474 }
475
476 event->header.type = PERF_RECORD_MMAP;
477
478 /*
479 * kernel uses 0 for user space maps, see kernel/perf_event.c
480 * __perf_event_mmap
481 */
482 if (machine__is_host(machine))
483 event->header.misc = PERF_RECORD_MISC_KERNEL;
484 else
485 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
486
487 for (pos = maps__first(maps); pos; pos = map__next(pos)) {
488 size_t size;
489
490 if (!__map__is_kmodule(pos))
491 continue;
492
493 size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
494 event->mmap.header.type = PERF_RECORD_MMAP;
495 event->mmap.header.size = (sizeof(event->mmap) -
496 (sizeof(event->mmap.filename) - size));
497 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
498 event->mmap.header.size += machine->id_hdr_size;
499 event->mmap.start = pos->start;
500 event->mmap.len = pos->end - pos->start;
501 event->mmap.pid = machine->pid;
502
503 memcpy(event->mmap.filename, pos->dso->long_name,
504 pos->dso->long_name_len + 1);
505 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
506 rc = -1;
507 break;
508 }
509 }
510
511 free(event);
512 return rc;
513 }
514
515 static int __event__synthesize_thread(union perf_event *comm_event,
516 union perf_event *mmap_event,
517 union perf_event *fork_event,
518 union perf_event *namespaces_event,
519 pid_t pid, int full,
520 perf_event__handler_t process,
521 struct perf_tool *tool,
522 struct machine *machine,
523 bool mmap_data,
524 unsigned int proc_map_timeout)
525 {
526 char filename[PATH_MAX];
527 DIR *tasks;
528 struct dirent *dirent;
529 pid_t tgid, ppid;
530 int rc = 0;
531
532 /* special case: only send one comm event using passed in pid */
533 if (!full) {
534 tgid = perf_event__synthesize_comm(tool, comm_event, pid,
535 process, machine);
536
537 if (tgid == -1)
538 return -1;
539
540 if (perf_event__synthesize_namespaces(tool, namespaces_event, pid,
541 tgid, process, machine) < 0)
542 return -1;
543
544 /*
545 * send mmap only for thread group leader
546 * see thread__init_map_groups
547 */
548 if (pid == tgid &&
549 perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
550 process, machine, mmap_data,
551 proc_map_timeout))
552 return -1;
553
554 return 0;
555 }
556
557 if (machine__is_default_guest(machine))
558 return 0;
559
560 snprintf(filename, sizeof(filename), "%s/proc/%d/task",
561 machine->root_dir, pid);
562
563 tasks = opendir(filename);
564 if (tasks == NULL) {
565 pr_debug("couldn't open %s\n", filename);
566 return 0;
567 }
568
569 while ((dirent = readdir(tasks)) != NULL) {
570 char *end;
571 pid_t _pid;
572
573 _pid = strtol(dirent->d_name, &end, 10);
574 if (*end)
575 continue;
576
577 rc = -1;
578 if (perf_event__prepare_comm(comm_event, _pid, machine,
579 &tgid, &ppid) != 0)
580 break;
581
582 if (perf_event__synthesize_fork(tool, fork_event, _pid, tgid,
583 ppid, process, machine) < 0)
584 break;
585
586 if (perf_event__synthesize_namespaces(tool, namespaces_event, _pid,
587 tgid, process, machine) < 0)
588 break;
589
590 /*
591 * Send the prepared comm event
592 */
593 if (perf_tool__process_synth_event(tool, comm_event, machine, process) != 0)
594 break;
595
596 rc = 0;
597 if (_pid == pid) {
598 /* process the parent's maps too */
599 rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
600 process, machine, mmap_data, proc_map_timeout);
601 if (rc)
602 break;
603 }
604 }
605
606 closedir(tasks);
607 return rc;
608 }
609
610 int perf_event__synthesize_thread_map(struct perf_tool *tool,
611 struct thread_map *threads,
612 perf_event__handler_t process,
613 struct machine *machine,
614 bool mmap_data,
615 unsigned int proc_map_timeout)
616 {
617 union perf_event *comm_event, *mmap_event, *fork_event;
618 union perf_event *namespaces_event;
619 int err = -1, thread, j;
620
621 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
622 if (comm_event == NULL)
623 goto out;
624
625 mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
626 if (mmap_event == NULL)
627 goto out_free_comm;
628
629 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
630 if (fork_event == NULL)
631 goto out_free_mmap;
632
633 namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
634 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
635 machine->id_hdr_size);
636 if (namespaces_event == NULL)
637 goto out_free_fork;
638
639 err = 0;
640 for (thread = 0; thread < threads->nr; ++thread) {
641 if (__event__synthesize_thread(comm_event, mmap_event,
642 fork_event, namespaces_event,
643 thread_map__pid(threads, thread), 0,
644 process, tool, machine,
645 mmap_data, proc_map_timeout)) {
646 err = -1;
647 break;
648 }
649
650 /*
651 * comm.pid is set to thread group id by
652 * perf_event__synthesize_comm
653 */
654 if ((int) comm_event->comm.pid != thread_map__pid(threads, thread)) {
655 bool need_leader = true;
656
657 /* is thread group leader in thread_map? */
658 for (j = 0; j < threads->nr; ++j) {
659 if ((int) comm_event->comm.pid == thread_map__pid(threads, j)) {
660 need_leader = false;
661 break;
662 }
663 }
664
665 /* if not, generate events for it */
666 if (need_leader &&
667 __event__synthesize_thread(comm_event, mmap_event,
668 fork_event, namespaces_event,
669 comm_event->comm.pid, 0,
670 process, tool, machine,
671 mmap_data, proc_map_timeout)) {
672 err = -1;
673 break;
674 }
675 }
676 }
677 free(namespaces_event);
678 out_free_fork:
679 free(fork_event);
680 out_free_mmap:
681 free(mmap_event);
682 out_free_comm:
683 free(comm_event);
684 out:
685 return err;
686 }
687
688 static int __perf_event__synthesize_threads(struct perf_tool *tool,
689 perf_event__handler_t process,
690 struct machine *machine,
691 bool mmap_data,
692 unsigned int proc_map_timeout,
693 struct dirent **dirent,
694 int start,
695 int num)
696 {
697 union perf_event *comm_event, *mmap_event, *fork_event;
698 union perf_event *namespaces_event;
699 int err = -1;
700 char *end;
701 pid_t pid;
702 int i;
703
704 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
705 if (comm_event == NULL)
706 goto out;
707
708 mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
709 if (mmap_event == NULL)
710 goto out_free_comm;
711
712 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
713 if (fork_event == NULL)
714 goto out_free_mmap;
715
716 namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
717 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
718 machine->id_hdr_size);
719 if (namespaces_event == NULL)
720 goto out_free_fork;
721
722 for (i = start; i < start + num; i++) {
723 if (!isdigit(dirent[i]->d_name[0]))
724 continue;
725
726 pid = (pid_t)strtol(dirent[i]->d_name, &end, 10);
727 /* only interested in proper numerical dirents */
728 if (*end)
729 continue;
730 /*
731 * We may race with exiting thread, so don't stop just because
732 * one thread couldn't be synthesized.
733 */
734 __event__synthesize_thread(comm_event, mmap_event, fork_event,
735 namespaces_event, pid, 1, process,
736 tool, machine, mmap_data,
737 proc_map_timeout);
738 }
739 err = 0;
740
741 free(namespaces_event);
742 out_free_fork:
743 free(fork_event);
744 out_free_mmap:
745 free(mmap_event);
746 out_free_comm:
747 free(comm_event);
748 out:
749 return err;
750 }
751
752 struct synthesize_threads_arg {
753 struct perf_tool *tool;
754 perf_event__handler_t process;
755 struct machine *machine;
756 bool mmap_data;
757 unsigned int proc_map_timeout;
758 struct dirent **dirent;
759 int num;
760 int start;
761 };
762
763 static void *synthesize_threads_worker(void *arg)
764 {
765 struct synthesize_threads_arg *args = arg;
766
767 __perf_event__synthesize_threads(args->tool, args->process,
768 args->machine, args->mmap_data,
769 args->proc_map_timeout, args->dirent,
770 args->start, args->num);
771 return NULL;
772 }
773
774 int perf_event__synthesize_threads(struct perf_tool *tool,
775 perf_event__handler_t process,
776 struct machine *machine,
777 bool mmap_data,
778 unsigned int proc_map_timeout,
779 unsigned int nr_threads_synthesize)
780 {
781 struct synthesize_threads_arg *args = NULL;
782 pthread_t *synthesize_threads = NULL;
783 char proc_path[PATH_MAX];
784 struct dirent **dirent;
785 int num_per_thread;
786 int m, n, i, j;
787 int thread_nr;
788 int base = 0;
789 int err = -1;
790
791
792 if (machine__is_default_guest(machine))
793 return 0;
794
795 snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir);
796 n = scandir(proc_path, &dirent, 0, alphasort);
797 if (n < 0)
798 return err;
799
800 if (nr_threads_synthesize == UINT_MAX)
801 thread_nr = sysconf(_SC_NPROCESSORS_ONLN);
802 else
803 thread_nr = nr_threads_synthesize;
804
805 if (thread_nr <= 1) {
806 err = __perf_event__synthesize_threads(tool, process,
807 machine, mmap_data,
808 proc_map_timeout,
809 dirent, base, n);
810 goto free_dirent;
811 }
812 if (thread_nr > n)
813 thread_nr = n;
814
815 synthesize_threads = calloc(sizeof(pthread_t), thread_nr);
816 if (synthesize_threads == NULL)
817 goto free_dirent;
818
819 args = calloc(sizeof(*args), thread_nr);
820 if (args == NULL)
821 goto free_threads;
822
823 num_per_thread = n / thread_nr;
824 m = n % thread_nr;
825 for (i = 0; i < thread_nr; i++) {
826 args[i].tool = tool;
827 args[i].process = process;
828 args[i].machine = machine;
829 args[i].mmap_data = mmap_data;
830 args[i].proc_map_timeout = proc_map_timeout;
831 args[i].dirent = dirent;
832 }
833 for (i = 0; i < m; i++) {
834 args[i].num = num_per_thread + 1;
835 args[i].start = i * args[i].num;
836 }
837 if (i != 0)
838 base = args[i-1].start + args[i-1].num;
839 for (j = i; j < thread_nr; j++) {
840 args[j].num = num_per_thread;
841 args[j].start = base + (j - i) * args[i].num;
842 }
843
844 for (i = 0; i < thread_nr; i++) {
845 if (pthread_create(&synthesize_threads[i], NULL,
846 synthesize_threads_worker, &args[i]))
847 goto out_join;
848 }
849 err = 0;
850 out_join:
851 for (i = 0; i < thread_nr; i++)
852 pthread_join(synthesize_threads[i], NULL);
853 free(args);
854 free_threads:
855 free(synthesize_threads);
856 free_dirent:
857 for (i = 0; i < n; i++)
858 free(dirent[i]);
859 free(dirent);
860
861 return err;
862 }
863
864 struct process_symbol_args {
865 const char *name;
866 u64 start;
867 };
868
869 static int find_symbol_cb(void *arg, const char *name, char type,
870 u64 start)
871 {
872 struct process_symbol_args *args = arg;
873
874 /*
875 * Must be a function or at least an alias, as in PARISC64, where "_text" is
876 * an 'A' to the same address as "_stext".
877 */
878 if (!(kallsyms__is_function(type) ||
879 type == 'A') || strcmp(name, args->name))
880 return 0;
881
882 args->start = start;
883 return 1;
884 }
885
886 int kallsyms__get_function_start(const char *kallsyms_filename,
887 const char *symbol_name, u64 *addr)
888 {
889 struct process_symbol_args args = { .name = symbol_name, };
890
891 if (kallsyms__parse(kallsyms_filename, &args, find_symbol_cb) <= 0)
892 return -1;
893
894 *addr = args.start;
895 return 0;
896 }
897
898 int __weak perf_event__synthesize_extra_kmaps(struct perf_tool *tool __maybe_unused,
899 perf_event__handler_t process __maybe_unused,
900 struct machine *machine __maybe_unused)
901 {
902 return 0;
903 }
904
905 static int __perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
906 perf_event__handler_t process,
907 struct machine *machine)
908 {
909 size_t size;
910 struct map *map = machine__kernel_map(machine);
911 struct kmap *kmap;
912 int err;
913 union perf_event *event;
914
915 if (symbol_conf.kptr_restrict)
916 return -1;
917 if (map == NULL)
918 return -1;
919
920 /*
921 * We should get this from /sys/kernel/sections/.text, but till that is
922 * available use this, and after it is use this as a fallback for older
923 * kernels.
924 */
925 event = zalloc((sizeof(event->mmap) + machine->id_hdr_size));
926 if (event == NULL) {
927 pr_debug("Not enough memory synthesizing mmap event "
928 "for kernel modules\n");
929 return -1;
930 }
931
932 if (machine__is_host(machine)) {
933 /*
934 * kernel uses PERF_RECORD_MISC_USER for user space maps,
935 * see kernel/perf_event.c __perf_event_mmap
936 */
937 event->header.misc = PERF_RECORD_MISC_KERNEL;
938 } else {
939 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
940 }
941
942 kmap = map__kmap(map);
943 size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
944 "%s%s", machine->mmap_name, kmap->ref_reloc_sym->name) + 1;
945 size = PERF_ALIGN(size, sizeof(u64));
946 event->mmap.header.type = PERF_RECORD_MMAP;
947 event->mmap.header.size = (sizeof(event->mmap) -
948 (sizeof(event->mmap.filename) - size) + machine->id_hdr_size);
949 event->mmap.pgoff = kmap->ref_reloc_sym->addr;
950 event->mmap.start = map->start;
951 event->mmap.len = map->end - event->mmap.start;
952 event->mmap.pid = machine->pid;
953
954 err = perf_tool__process_synth_event(tool, event, machine, process);
955 free(event);
956
957 return err;
958 }
959
960 int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
961 perf_event__handler_t process,
962 struct machine *machine)
963 {
964 int err;
965
966 err = __perf_event__synthesize_kernel_mmap(tool, process, machine);
967 if (err < 0)
968 return err;
969
970 return perf_event__synthesize_extra_kmaps(tool, process, machine);
971 }
972
973 int perf_event__synthesize_thread_map2(struct perf_tool *tool,
974 struct thread_map *threads,
975 perf_event__handler_t process,
976 struct machine *machine)
977 {
978 union perf_event *event;
979 int i, err, size;
980
981 size = sizeof(event->thread_map);
982 size += threads->nr * sizeof(event->thread_map.entries[0]);
983
984 event = zalloc(size);
985 if (!event)
986 return -ENOMEM;
987
988 event->header.type = PERF_RECORD_THREAD_MAP;
989 event->header.size = size;
990 event->thread_map.nr = threads->nr;
991
992 for (i = 0; i < threads->nr; i++) {
993 struct thread_map_event_entry *entry = &event->thread_map.entries[i];
994 char *comm = thread_map__comm(threads, i);
995
996 if (!comm)
997 comm = (char *) "";
998
999 entry->pid = thread_map__pid(threads, i);
1000 strncpy((char *) &entry->comm, comm, sizeof(entry->comm));
1001 }
1002
1003 err = process(tool, event, NULL, machine);
1004
1005 free(event);
1006 return err;
1007 }
1008
1009 static void synthesize_cpus(struct cpu_map_entries *cpus,
1010 struct cpu_map *map)
1011 {
1012 int i;
1013
1014 cpus->nr = map->nr;
1015
1016 for (i = 0; i < map->nr; i++)
1017 cpus->cpu[i] = map->map[i];
1018 }
1019
1020 static void synthesize_mask(struct cpu_map_mask *mask,
1021 struct cpu_map *map, int max)
1022 {
1023 int i;
1024
1025 mask->nr = BITS_TO_LONGS(max);
1026 mask->long_size = sizeof(long);
1027
1028 for (i = 0; i < map->nr; i++)
1029 set_bit(map->map[i], mask->mask);
1030 }
1031
1032 static size_t cpus_size(struct cpu_map *map)
1033 {
1034 return sizeof(struct cpu_map_entries) + map->nr * sizeof(u16);
1035 }
1036
1037 static size_t mask_size(struct cpu_map *map, int *max)
1038 {
1039 int i;
1040
1041 *max = 0;
1042
1043 for (i = 0; i < map->nr; i++) {
1044 /* bit possition of the cpu is + 1 */
1045 int bit = map->map[i] + 1;
1046
1047 if (bit > *max)
1048 *max = bit;
1049 }
1050
1051 return sizeof(struct cpu_map_mask) + BITS_TO_LONGS(*max) * sizeof(long);
1052 }
1053
1054 void *cpu_map_data__alloc(struct cpu_map *map, size_t *size, u16 *type, int *max)
1055 {
1056 size_t size_cpus, size_mask;
1057 bool is_dummy = cpu_map__empty(map);
1058
1059 /*
1060 * Both array and mask data have variable size based
1061 * on the number of cpus and their actual values.
1062 * The size of the 'struct cpu_map_data' is:
1063 *
1064 * array = size of 'struct cpu_map_entries' +
1065 * number of cpus * sizeof(u64)
1066 *
1067 * mask = size of 'struct cpu_map_mask' +
1068 * maximum cpu bit converted to size of longs
1069 *
1070 * and finaly + the size of 'struct cpu_map_data'.
1071 */
1072 size_cpus = cpus_size(map);
1073 size_mask = mask_size(map, max);
1074
1075 if (is_dummy || (size_cpus < size_mask)) {
1076 *size += size_cpus;
1077 *type = PERF_CPU_MAP__CPUS;
1078 } else {
1079 *size += size_mask;
1080 *type = PERF_CPU_MAP__MASK;
1081 }
1082
1083 *size += sizeof(struct cpu_map_data);
1084 *size = PERF_ALIGN(*size, sizeof(u64));
1085 return zalloc(*size);
1086 }
1087
1088 void cpu_map_data__synthesize(struct cpu_map_data *data, struct cpu_map *map,
1089 u16 type, int max)
1090 {
1091 data->type = type;
1092
1093 switch (type) {
1094 case PERF_CPU_MAP__CPUS:
1095 synthesize_cpus((struct cpu_map_entries *) data->data, map);
1096 break;
1097 case PERF_CPU_MAP__MASK:
1098 synthesize_mask((struct cpu_map_mask *) data->data, map, max);
1099 default:
1100 break;
1101 };
1102 }
1103
1104 static struct cpu_map_event* cpu_map_event__new(struct cpu_map *map)
1105 {
1106 size_t size = sizeof(struct cpu_map_event);
1107 struct cpu_map_event *event;
1108 int max;
1109 u16 type;
1110
1111 event = cpu_map_data__alloc(map, &size, &type, &max);
1112 if (!event)
1113 return NULL;
1114
1115 event->header.type = PERF_RECORD_CPU_MAP;
1116 event->header.size = size;
1117 event->data.type = type;
1118
1119 cpu_map_data__synthesize(&event->data, map, type, max);
1120 return event;
1121 }
1122
1123 int perf_event__synthesize_cpu_map(struct perf_tool *tool,
1124 struct cpu_map *map,
1125 perf_event__handler_t process,
1126 struct machine *machine)
1127 {
1128 struct cpu_map_event *event;
1129 int err;
1130
1131 event = cpu_map_event__new(map);
1132 if (!event)
1133 return -ENOMEM;
1134
1135 err = process(tool, (union perf_event *) event, NULL, machine);
1136
1137 free(event);
1138 return err;
1139 }
1140
1141 int perf_event__synthesize_stat_config(struct perf_tool *tool,
1142 struct perf_stat_config *config,
1143 perf_event__handler_t process,
1144 struct machine *machine)
1145 {
1146 struct stat_config_event *event;
1147 int size, i = 0, err;
1148
1149 size = sizeof(*event);
1150 size += (PERF_STAT_CONFIG_TERM__MAX * sizeof(event->data[0]));
1151
1152 event = zalloc(size);
1153 if (!event)
1154 return -ENOMEM;
1155
1156 event->header.type = PERF_RECORD_STAT_CONFIG;
1157 event->header.size = size;
1158 event->nr = PERF_STAT_CONFIG_TERM__MAX;
1159
1160 #define ADD(__term, __val) \
1161 event->data[i].tag = PERF_STAT_CONFIG_TERM__##__term; \
1162 event->data[i].val = __val; \
1163 i++;
1164
1165 ADD(AGGR_MODE, config->aggr_mode)
1166 ADD(INTERVAL, config->interval)
1167 ADD(SCALE, config->scale)
1168
1169 WARN_ONCE(i != PERF_STAT_CONFIG_TERM__MAX,
1170 "stat config terms unbalanced\n");
1171 #undef ADD
1172
1173 err = process(tool, (union perf_event *) event, NULL, machine);
1174
1175 free(event);
1176 return err;
1177 }
1178
1179 int perf_event__synthesize_stat(struct perf_tool *tool,
1180 u32 cpu, u32 thread, u64 id,
1181 struct perf_counts_values *count,
1182 perf_event__handler_t process,
1183 struct machine *machine)
1184 {
1185 struct stat_event event;
1186
1187 event.header.type = PERF_RECORD_STAT;
1188 event.header.size = sizeof(event);
1189 event.header.misc = 0;
1190
1191 event.id = id;
1192 event.cpu = cpu;
1193 event.thread = thread;
1194 event.val = count->val;
1195 event.ena = count->ena;
1196 event.run = count->run;
1197
1198 return process(tool, (union perf_event *) &event, NULL, machine);
1199 }
1200
1201 int perf_event__synthesize_stat_round(struct perf_tool *tool,
1202 u64 evtime, u64 type,
1203 perf_event__handler_t process,
1204 struct machine *machine)
1205 {
1206 struct stat_round_event event;
1207
1208 event.header.type = PERF_RECORD_STAT_ROUND;
1209 event.header.size = sizeof(event);
1210 event.header.misc = 0;
1211
1212 event.time = evtime;
1213 event.type = type;
1214
1215 return process(tool, (union perf_event *) &event, NULL, machine);
1216 }
1217
1218 void perf_event__read_stat_config(struct perf_stat_config *config,
1219 struct stat_config_event *event)
1220 {
1221 unsigned i;
1222
1223 for (i = 0; i < event->nr; i++) {
1224
1225 switch (event->data[i].tag) {
1226 #define CASE(__term, __val) \
1227 case PERF_STAT_CONFIG_TERM__##__term: \
1228 config->__val = event->data[i].val; \
1229 break;
1230
1231 CASE(AGGR_MODE, aggr_mode)
1232 CASE(SCALE, scale)
1233 CASE(INTERVAL, interval)
1234 #undef CASE
1235 default:
1236 pr_warning("unknown stat config term %" PRIu64 "\n",
1237 event->data[i].tag);
1238 }
1239 }
1240 }
1241
1242 size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
1243 {
1244 const char *s;
1245
1246 if (event->header.misc & PERF_RECORD_MISC_COMM_EXEC)
1247 s = " exec";
1248 else
1249 s = "";
1250
1251 return fprintf(fp, "%s: %s:%d/%d\n", s, event->comm.comm, event->comm.pid, event->comm.tid);
1252 }
1253
1254 size_t perf_event__fprintf_namespaces(union perf_event *event, FILE *fp)
1255 {
1256 size_t ret = 0;
1257 struct perf_ns_link_info *ns_link_info;
1258 u32 nr_namespaces, idx;
1259
1260 ns_link_info = event->namespaces.link_info;
1261 nr_namespaces = event->namespaces.nr_namespaces;
1262
1263 ret += fprintf(fp, " %d/%d - nr_namespaces: %u\n\t\t[",
1264 event->namespaces.pid,
1265 event->namespaces.tid,
1266 nr_namespaces);
1267
1268 for (idx = 0; idx < nr_namespaces; idx++) {
1269 if (idx && (idx % 4 == 0))
1270 ret += fprintf(fp, "\n\t\t ");
1271
1272 ret += fprintf(fp, "%u/%s: %" PRIu64 "/%#" PRIx64 "%s", idx,
1273 perf_ns__name(idx), (u64)ns_link_info[idx].dev,
1274 (u64)ns_link_info[idx].ino,
1275 ((idx + 1) != nr_namespaces) ? ", " : "]\n");
1276 }
1277
1278 return ret;
1279 }
1280
1281 int perf_event__process_comm(struct perf_tool *tool __maybe_unused,
1282 union perf_event *event,
1283 struct perf_sample *sample,
1284 struct machine *machine)
1285 {
1286 return machine__process_comm_event(machine, event, sample);
1287 }
1288
1289 int perf_event__process_namespaces(struct perf_tool *tool __maybe_unused,
1290 union perf_event *event,
1291 struct perf_sample *sample,
1292 struct machine *machine)
1293 {
1294 return machine__process_namespaces_event(machine, event, sample);
1295 }
1296
1297 int perf_event__process_lost(struct perf_tool *tool __maybe_unused,
1298 union perf_event *event,
1299 struct perf_sample *sample,
1300 struct machine *machine)
1301 {
1302 return machine__process_lost_event(machine, event, sample);
1303 }
1304
1305 int perf_event__process_aux(struct perf_tool *tool __maybe_unused,
1306 union perf_event *event,
1307 struct perf_sample *sample __maybe_unused,
1308 struct machine *machine)
1309 {
1310 return machine__process_aux_event(machine, event);
1311 }
1312
1313 int perf_event__process_itrace_start(struct perf_tool *tool __maybe_unused,
1314 union perf_event *event,
1315 struct perf_sample *sample __maybe_unused,
1316 struct machine *machine)
1317 {
1318 return machine__process_itrace_start_event(machine, event);
1319 }
1320
1321 int perf_event__process_lost_samples(struct perf_tool *tool __maybe_unused,
1322 union perf_event *event,
1323 struct perf_sample *sample,
1324 struct machine *machine)
1325 {
1326 return machine__process_lost_samples_event(machine, event, sample);
1327 }
1328
1329 int perf_event__process_switch(struct perf_tool *tool __maybe_unused,
1330 union perf_event *event,
1331 struct perf_sample *sample __maybe_unused,
1332 struct machine *machine)
1333 {
1334 return machine__process_switch_event(machine, event);
1335 }
1336
1337 size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
1338 {
1339 return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %c %s\n",
1340 event->mmap.pid, event->mmap.tid, event->mmap.start,
1341 event->mmap.len, event->mmap.pgoff,
1342 (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x',
1343 event->mmap.filename);
1344 }
1345
1346 size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp)
1347 {
1348 return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64
1349 " %02x:%02x %"PRIu64" %"PRIu64"]: %c%c%c%c %s\n",
1350 event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
1351 event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj,
1352 event->mmap2.min, event->mmap2.ino,
1353 event->mmap2.ino_generation,
1354 (event->mmap2.prot & PROT_READ) ? 'r' : '-',
1355 (event->mmap2.prot & PROT_WRITE) ? 'w' : '-',
1356 (event->mmap2.prot & PROT_EXEC) ? 'x' : '-',
1357 (event->mmap2.flags & MAP_SHARED) ? 's' : 'p',
1358 event->mmap2.filename);
1359 }
1360
1361 size_t perf_event__fprintf_thread_map(union perf_event *event, FILE *fp)
1362 {
1363 struct thread_map *threads = thread_map__new_event(&event->thread_map);
1364 size_t ret;
1365
1366 ret = fprintf(fp, " nr: ");
1367
1368 if (threads)
1369 ret += thread_map__fprintf(threads, fp);
1370 else
1371 ret += fprintf(fp, "failed to get threads from event\n");
1372
1373 thread_map__put(threads);
1374 return ret;
1375 }
1376
1377 size_t perf_event__fprintf_cpu_map(union perf_event *event, FILE *fp)
1378 {
1379 struct cpu_map *cpus = cpu_map__new_data(&event->cpu_map.data);
1380 size_t ret;
1381
1382 ret = fprintf(fp, ": ");
1383
1384 if (cpus)
1385 ret += cpu_map__fprintf(cpus, fp);
1386 else
1387 ret += fprintf(fp, "failed to get cpumap from event\n");
1388
1389 cpu_map__put(cpus);
1390 return ret;
1391 }
1392
1393 int perf_event__process_mmap(struct perf_tool *tool __maybe_unused,
1394 union perf_event *event,
1395 struct perf_sample *sample,
1396 struct machine *machine)
1397 {
1398 return machine__process_mmap_event(machine, event, sample);
1399 }
1400
1401 int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused,
1402 union perf_event *event,
1403 struct perf_sample *sample,
1404 struct machine *machine)
1405 {
1406 return machine__process_mmap2_event(machine, event, sample);
1407 }
1408
1409 size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
1410 {
1411 return fprintf(fp, "(%d:%d):(%d:%d)\n",
1412 event->fork.pid, event->fork.tid,
1413 event->fork.ppid, event->fork.ptid);
1414 }
1415
1416 int perf_event__process_fork(struct perf_tool *tool __maybe_unused,
1417 union perf_event *event,
1418 struct perf_sample *sample,
1419 struct machine *machine)
1420 {
1421 return machine__process_fork_event(machine, event, sample);
1422 }
1423
1424 int perf_event__process_exit(struct perf_tool *tool __maybe_unused,
1425 union perf_event *event,
1426 struct perf_sample *sample,
1427 struct machine *machine)
1428 {
1429 return machine__process_exit_event(machine, event, sample);
1430 }
1431
1432 size_t perf_event__fprintf_aux(union perf_event *event, FILE *fp)
1433 {
1434 return fprintf(fp, " offset: %#"PRIx64" size: %#"PRIx64" flags: %#"PRIx64" [%s%s%s]\n",
1435 event->aux.aux_offset, event->aux.aux_size,
1436 event->aux.flags,
1437 event->aux.flags & PERF_AUX_FLAG_TRUNCATED ? "T" : "",
1438 event->aux.flags & PERF_AUX_FLAG_OVERWRITE ? "O" : "",
1439 event->aux.flags & PERF_AUX_FLAG_PARTIAL ? "P" : "");
1440 }
1441
1442 size_t perf_event__fprintf_itrace_start(union perf_event *event, FILE *fp)
1443 {
1444 return fprintf(fp, " pid: %u tid: %u\n",
1445 event->itrace_start.pid, event->itrace_start.tid);
1446 }
1447
1448 size_t perf_event__fprintf_switch(union perf_event *event, FILE *fp)
1449 {
1450 bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT;
1451 const char *in_out = !out ? "IN " :
1452 !(event->header.misc & PERF_RECORD_MISC_SWITCH_OUT_PREEMPT) ?
1453 "OUT " : "OUT preempt";
1454
1455 if (event->header.type == PERF_RECORD_SWITCH)
1456 return fprintf(fp, " %s\n", in_out);
1457
1458 return fprintf(fp, " %s %s pid/tid: %5u/%-5u\n",
1459 in_out, out ? "next" : "prev",
1460 event->context_switch.next_prev_pid,
1461 event->context_switch.next_prev_tid);
1462 }
1463
1464 static size_t perf_event__fprintf_lost(union perf_event *event, FILE *fp)
1465 {
1466 return fprintf(fp, " lost %" PRIu64 "\n", event->lost.lost);
1467 }
1468
1469 size_t perf_event__fprintf(union perf_event *event, FILE *fp)
1470 {
1471 size_t ret = fprintf(fp, "PERF_RECORD_%s",
1472 perf_event__name(event->header.type));
1473
1474 switch (event->header.type) {
1475 case PERF_RECORD_COMM:
1476 ret += perf_event__fprintf_comm(event, fp);
1477 break;
1478 case PERF_RECORD_FORK:
1479 case PERF_RECORD_EXIT:
1480 ret += perf_event__fprintf_task(event, fp);
1481 break;
1482 case PERF_RECORD_MMAP:
1483 ret += perf_event__fprintf_mmap(event, fp);
1484 break;
1485 case PERF_RECORD_NAMESPACES:
1486 ret += perf_event__fprintf_namespaces(event, fp);
1487 break;
1488 case PERF_RECORD_MMAP2:
1489 ret += perf_event__fprintf_mmap2(event, fp);
1490 break;
1491 case PERF_RECORD_AUX:
1492 ret += perf_event__fprintf_aux(event, fp);
1493 break;
1494 case PERF_RECORD_ITRACE_START:
1495 ret += perf_event__fprintf_itrace_start(event, fp);
1496 break;
1497 case PERF_RECORD_SWITCH:
1498 case PERF_RECORD_SWITCH_CPU_WIDE:
1499 ret += perf_event__fprintf_switch(event, fp);
1500 break;
1501 case PERF_RECORD_LOST:
1502 ret += perf_event__fprintf_lost(event, fp);
1503 break;
1504 default:
1505 ret += fprintf(fp, "\n");
1506 }
1507
1508 return ret;
1509 }
1510
1511 int perf_event__process(struct perf_tool *tool __maybe_unused,
1512 union perf_event *event,
1513 struct perf_sample *sample,
1514 struct machine *machine)
1515 {
1516 return machine__process_event(machine, event, sample);
1517 }
1518
1519 struct map *thread__find_map(struct thread *thread, u8 cpumode, u64 addr,
1520 struct addr_location *al)
1521 {
1522 struct map_groups *mg = thread->mg;
1523 struct machine *machine = mg->machine;
1524 bool load_map = false;
1525
1526 al->machine = machine;
1527 al->thread = thread;
1528 al->addr = addr;
1529 al->cpumode = cpumode;
1530 al->filtered = 0;
1531
1532 if (machine == NULL) {
1533 al->map = NULL;
1534 return NULL;
1535 }
1536
1537 if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
1538 al->level = 'k';
1539 mg = &machine->kmaps;
1540 load_map = true;
1541 } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
1542 al->level = '.';
1543 } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
1544 al->level = 'g';
1545 mg = &machine->kmaps;
1546 load_map = true;
1547 } else if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) {
1548 al->level = 'u';
1549 } else {
1550 al->level = 'H';
1551 al->map = NULL;
1552
1553 if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
1554 cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
1555 !perf_guest)
1556 al->filtered |= (1 << HIST_FILTER__GUEST);
1557 if ((cpumode == PERF_RECORD_MISC_USER ||
1558 cpumode == PERF_RECORD_MISC_KERNEL) &&
1559 !perf_host)
1560 al->filtered |= (1 << HIST_FILTER__HOST);
1561
1562 return NULL;
1563 }
1564
1565 al->map = map_groups__find(mg, al->addr);
1566 if (al->map != NULL) {
1567 /*
1568 * Kernel maps might be changed when loading symbols so loading
1569 * must be done prior to using kernel maps.
1570 */
1571 if (load_map)
1572 map__load(al->map);
1573 al->addr = al->map->map_ip(al->map, al->addr);
1574 }
1575
1576 return al->map;
1577 }
1578
1579 /*
1580 * For branch stacks or branch samples, the sample cpumode might not be correct
1581 * because it applies only to the sample 'ip' and not necessary to 'addr' or
1582 * branch stack addresses. If possible, use a fallback to deal with those cases.
1583 */
1584 struct map *thread__find_map_fb(struct thread *thread, u8 cpumode, u64 addr,
1585 struct addr_location *al)
1586 {
1587 struct map *map = thread__find_map(thread, cpumode, addr, al);
1588 struct machine *machine = thread->mg->machine;
1589 u8 addr_cpumode = machine__addr_cpumode(machine, cpumode, addr);
1590
1591 if (map || addr_cpumode == cpumode)
1592 return map;
1593
1594 return thread__find_map(thread, addr_cpumode, addr, al);
1595 }
1596
1597 struct symbol *thread__find_symbol(struct thread *thread, u8 cpumode,
1598 u64 addr, struct addr_location *al)
1599 {
1600 al->sym = NULL;
1601 if (thread__find_map(thread, cpumode, addr, al))
1602 al->sym = map__find_symbol(al->map, al->addr);
1603 return al->sym;
1604 }
1605
1606 struct symbol *thread__find_symbol_fb(struct thread *thread, u8 cpumode,
1607 u64 addr, struct addr_location *al)
1608 {
1609 al->sym = NULL;
1610 if (thread__find_map_fb(thread, cpumode, addr, al))
1611 al->sym = map__find_symbol(al->map, al->addr);
1612 return al->sym;
1613 }
1614
1615 /*
1616 * Callers need to drop the reference to al->thread, obtained in
1617 * machine__findnew_thread()
1618 */
1619 int machine__resolve(struct machine *machine, struct addr_location *al,
1620 struct perf_sample *sample)
1621 {
1622 struct thread *thread = machine__findnew_thread(machine, sample->pid,
1623 sample->tid);
1624
1625 if (thread == NULL)
1626 return -1;
1627
1628 dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
1629 thread__find_map(thread, sample->cpumode, sample->ip, al);
1630 dump_printf(" ...... dso: %s\n",
1631 al->map ? al->map->dso->long_name :
1632 al->level == 'H' ? "[hypervisor]" : "<not found>");
1633
1634 if (thread__is_filtered(thread))
1635 al->filtered |= (1 << HIST_FILTER__THREAD);
1636
1637 al->sym = NULL;
1638 al->cpu = sample->cpu;
1639 al->socket = -1;
1640 al->srcline = NULL;
1641
1642 if (al->cpu >= 0) {
1643 struct perf_env *env = machine->env;
1644
1645 if (env && env->cpu)
1646 al->socket = env->cpu[al->cpu].socket_id;
1647 }
1648
1649 if (al->map) {
1650 struct dso *dso = al->map->dso;
1651
1652 if (symbol_conf.dso_list &&
1653 (!dso || !(strlist__has_entry(symbol_conf.dso_list,
1654 dso->short_name) ||
1655 (dso->short_name != dso->long_name &&
1656 strlist__has_entry(symbol_conf.dso_list,
1657 dso->long_name))))) {
1658 al->filtered |= (1 << HIST_FILTER__DSO);
1659 }
1660
1661 al->sym = map__find_symbol(al->map, al->addr);
1662 }
1663
1664 if (symbol_conf.sym_list &&
1665 (!al->sym || !strlist__has_entry(symbol_conf.sym_list,
1666 al->sym->name))) {
1667 al->filtered |= (1 << HIST_FILTER__SYMBOL);
1668 }
1669
1670 return 0;
1671 }
1672
1673 /*
1674 * The preprocess_sample method will return with reference counts for the
1675 * in it, when done using (and perhaps getting ref counts if needing to
1676 * keep a pointer to one of those entries) it must be paired with
1677 * addr_location__put(), so that the refcounts can be decremented.
1678 */
1679 void addr_location__put(struct addr_location *al)
1680 {
1681 thread__zput(al->thread);
1682 }
1683
1684 bool is_bts_event(struct perf_event_attr *attr)
1685 {
1686 return attr->type == PERF_TYPE_HARDWARE &&
1687 (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) &&
1688 attr->sample_period == 1;
1689 }
1690
1691 bool sample_addr_correlates_sym(struct perf_event_attr *attr)
1692 {
1693 if (attr->type == PERF_TYPE_SOFTWARE &&
1694 (attr->config == PERF_COUNT_SW_PAGE_FAULTS ||
1695 attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
1696 attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ))
1697 return true;
1698
1699 if (is_bts_event(attr))
1700 return true;
1701
1702 return false;
1703 }
1704
1705 void thread__resolve(struct thread *thread, struct addr_location *al,
1706 struct perf_sample *sample)
1707 {
1708 thread__find_map_fb(thread, sample->cpumode, sample->addr, al);
1709
1710 al->cpu = sample->cpu;
1711 al->sym = NULL;
1712
1713 if (al->map)
1714 al->sym = map__find_symbol(al->map, al->addr);
1715 }
Linux with added FPC-III support