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perf intel-pt: Add lookahead callback
[linux/fpc-iii.git] / tools / perf / util / event.c
blobc9c6857360e44db907d12d823da7c745721ef696
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 "map.h"
25 #include "symbol.h"
26 #include "symbol/kallsyms.h"
27 #include "asm/bug.h"
28 #include "stat.h"
29 #include "session.h"
30 #include "bpf-event.h"
31
32 #define DEFAULT_PROC_MAP_PARSE_TIMEOUT 500
33
34 static const char *perf_event__names[] = {
35 [0] = "TOTAL",
36 [PERF_RECORD_MMAP] = "MMAP",
37 [PERF_RECORD_MMAP2] = "MMAP2",
38 [PERF_RECORD_LOST] = "LOST",
39 [PERF_RECORD_COMM] = "COMM",
40 [PERF_RECORD_EXIT] = "EXIT",
41 [PERF_RECORD_THROTTLE] = "THROTTLE",
42 [PERF_RECORD_UNTHROTTLE] = "UNTHROTTLE",
43 [PERF_RECORD_FORK] = "FORK",
44 [PERF_RECORD_READ] = "READ",
45 [PERF_RECORD_SAMPLE] = "SAMPLE",
46 [PERF_RECORD_AUX] = "AUX",
47 [PERF_RECORD_ITRACE_START] = "ITRACE_START",
48 [PERF_RECORD_LOST_SAMPLES] = "LOST_SAMPLES",
49 [PERF_RECORD_SWITCH] = "SWITCH",
50 [PERF_RECORD_SWITCH_CPU_WIDE] = "SWITCH_CPU_WIDE",
51 [PERF_RECORD_NAMESPACES] = "NAMESPACES",
52 [PERF_RECORD_KSYMBOL] = "KSYMBOL",
53 [PERF_RECORD_BPF_EVENT] = "BPF_EVENT",
54 [PERF_RECORD_HEADER_ATTR] = "ATTR",
55 [PERF_RECORD_HEADER_EVENT_TYPE] = "EVENT_TYPE",
56 [PERF_RECORD_HEADER_TRACING_DATA] = "TRACING_DATA",
57 [PERF_RECORD_HEADER_BUILD_ID] = "BUILD_ID",
58 [PERF_RECORD_FINISHED_ROUND] = "FINISHED_ROUND",
59 [PERF_RECORD_ID_INDEX] = "ID_INDEX",
60 [PERF_RECORD_AUXTRACE_INFO] = "AUXTRACE_INFO",
61 [PERF_RECORD_AUXTRACE] = "AUXTRACE",
62 [PERF_RECORD_AUXTRACE_ERROR] = "AUXTRACE_ERROR",
63 [PERF_RECORD_THREAD_MAP] = "THREAD_MAP",
64 [PERF_RECORD_CPU_MAP] = "CPU_MAP",
65 [PERF_RECORD_STAT_CONFIG] = "STAT_CONFIG",
66 [PERF_RECORD_STAT] = "STAT",
67 [PERF_RECORD_STAT_ROUND] = "STAT_ROUND",
68 [PERF_RECORD_EVENT_UPDATE] = "EVENT_UPDATE",
69 [PERF_RECORD_TIME_CONV] = "TIME_CONV",
70 [PERF_RECORD_HEADER_FEATURE] = "FEATURE",
71 [PERF_RECORD_COMPRESSED] = "COMPRESSED",
72 };
73
74 static const char *perf_ns__names[] = {
75 [NET_NS_INDEX] = "net",
76 [UTS_NS_INDEX] = "uts",
77 [IPC_NS_INDEX] = "ipc",
78 [PID_NS_INDEX] = "pid",
79 [USER_NS_INDEX] = "user",
80 [MNT_NS_INDEX] = "mnt",
81 [CGROUP_NS_INDEX] = "cgroup",
82 };
83
84 unsigned int proc_map_timeout = DEFAULT_PROC_MAP_PARSE_TIMEOUT;
85
86 const char *perf_event__name(unsigned int id)
87 {
88 if (id >= ARRAY_SIZE(perf_event__names))
89 return "INVALID";
90 if (!perf_event__names[id])
91 return "UNKNOWN";
92 return perf_event__names[id];
93 }
94
95 static const char *perf_ns__name(unsigned int id)
96 {
97 if (id >= ARRAY_SIZE(perf_ns__names))
98 return "UNKNOWN";
99 return perf_ns__names[id];
100 }
101
102 int perf_tool__process_synth_event(struct perf_tool *tool,
103 union perf_event *event,
104 struct machine *machine,
105 perf_event__handler_t process)
106 {
107 struct perf_sample synth_sample = {
108 .pid = -1,
109 .tid = -1,
110 .time = -1,
111 .stream_id = -1,
112 .cpu = -1,
113 .period = 1,
114 .cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK,
115 };
116
117 return process(tool, event, &synth_sample, machine);
118 };
119
120 /*
121 * Assumes that the first 4095 bytes of /proc/pid/stat contains
122 * the comm, tgid and ppid.
123 */
124 static int perf_event__get_comm_ids(pid_t pid, char *comm, size_t len,
125 pid_t *tgid, pid_t *ppid)
126 {
127 char filename[PATH_MAX];
128 char bf[4096];
129 int fd;
130 size_t size = 0;
131 ssize_t n;
132 char *name, *tgids, *ppids;
133
134 *tgid = -1;
135 *ppid = -1;
136
137 snprintf(filename, sizeof(filename), "/proc/%d/status", pid);
138
139 fd = open(filename, O_RDONLY);
140 if (fd < 0) {
141 pr_debug("couldn't open %s\n", filename);
142 return -1;
143 }
144
145 n = read(fd, bf, sizeof(bf) - 1);
146 close(fd);
147 if (n <= 0) {
148 pr_warning("Couldn't get COMM, tigd and ppid for pid %d\n",
149 pid);
150 return -1;
151 }
152 bf[n] = '\0';
153
154 name = strstr(bf, "Name:");
155 tgids = strstr(bf, "Tgid:");
156 ppids = strstr(bf, "PPid:");
157
158 if (name) {
159 char *nl;
160
161 name += 5; /* strlen("Name:") */
162 name = ltrim(name);
163
164 nl = strchr(name, '\n');
165 if (nl)
166 *nl = '\0';
167
168 size = strlen(name);
169 if (size >= len)
170 size = len - 1;
171 memcpy(comm, name, size);
172 comm[size] = '\0';
173 } else {
174 pr_debug("Name: string not found for pid %d\n", pid);
175 }
176
177 if (tgids) {
178 tgids += 5; /* strlen("Tgid:") */
179 *tgid = atoi(tgids);
180 } else {
181 pr_debug("Tgid: string not found for pid %d\n", pid);
182 }
183
184 if (ppids) {
185 ppids += 5; /* strlen("PPid:") */
186 *ppid = atoi(ppids);
187 } else {
188 pr_debug("PPid: string not found for pid %d\n", pid);
189 }
190
191 return 0;
192 }
193
194 static int perf_event__prepare_comm(union perf_event *event, pid_t pid,
195 struct machine *machine,
196 pid_t *tgid, pid_t *ppid)
197 {
198 size_t size;
199
200 *ppid = -1;
201
202 memset(&event->comm, 0, sizeof(event->comm));
203
204 if (machine__is_host(machine)) {
205 if (perf_event__get_comm_ids(pid, event->comm.comm,
206 sizeof(event->comm.comm),
207 tgid, ppid) != 0) {
208 return -1;
209 }
210 } else {
211 *tgid = machine->pid;
212 }
213
214 if (*tgid < 0)
215 return -1;
216
217 event->comm.pid = *tgid;
218 event->comm.header.type = PERF_RECORD_COMM;
219
220 size = strlen(event->comm.comm) + 1;
221 size = PERF_ALIGN(size, sizeof(u64));
222 memset(event->comm.comm + size, 0, machine->id_hdr_size);
223 event->comm.header.size = (sizeof(event->comm) -
224 (sizeof(event->comm.comm) - size) +
225 machine->id_hdr_size);
226 event->comm.tid = pid;
227
228 return 0;
229 }
230
231 pid_t perf_event__synthesize_comm(struct perf_tool *tool,
232 union perf_event *event, pid_t pid,
233 perf_event__handler_t process,
234 struct machine *machine)
235 {
236 pid_t tgid, ppid;
237
238 if (perf_event__prepare_comm(event, pid, machine, &tgid, &ppid) != 0)
239 return -1;
240
241 if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
242 return -1;
243
244 return tgid;
245 }
246
247 static void perf_event__get_ns_link_info(pid_t pid, const char *ns,
248 struct perf_ns_link_info *ns_link_info)
249 {
250 struct stat64 st;
251 char proc_ns[128];
252
253 sprintf(proc_ns, "/proc/%u/ns/%s", pid, ns);
254 if (stat64(proc_ns, &st) == 0) {
255 ns_link_info->dev = st.st_dev;
256 ns_link_info->ino = st.st_ino;
257 }
258 }
259
260 int perf_event__synthesize_namespaces(struct perf_tool *tool,
261 union perf_event *event,
262 pid_t pid, pid_t tgid,
263 perf_event__handler_t process,
264 struct machine *machine)
265 {
266 u32 idx;
267 struct perf_ns_link_info *ns_link_info;
268
269 if (!tool || !tool->namespace_events)
270 return 0;
271
272 memset(&event->namespaces, 0, (sizeof(event->namespaces) +
273 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
274 machine->id_hdr_size));
275
276 event->namespaces.pid = tgid;
277 event->namespaces.tid = pid;
278
279 event->namespaces.nr_namespaces = NR_NAMESPACES;
280
281 ns_link_info = event->namespaces.link_info;
282
283 for (idx = 0; idx < event->namespaces.nr_namespaces; idx++)
284 perf_event__get_ns_link_info(pid, perf_ns__name(idx),
285 &ns_link_info[idx]);
286
287 event->namespaces.header.type = PERF_RECORD_NAMESPACES;
288
289 event->namespaces.header.size = (sizeof(event->namespaces) +
290 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
291 machine->id_hdr_size);
292
293 if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
294 return -1;
295
296 return 0;
297 }
298
299 static int perf_event__synthesize_fork(struct perf_tool *tool,
300 union perf_event *event,
301 pid_t pid, pid_t tgid, pid_t ppid,
302 perf_event__handler_t process,
303 struct machine *machine)
304 {
305 memset(&event->fork, 0, sizeof(event->fork) + machine->id_hdr_size);
306
307 /*
308 * for main thread set parent to ppid from status file. For other
309 * threads set parent pid to main thread. ie., assume main thread
310 * spawns all threads in a process
311 */
312 if (tgid == pid) {
313 event->fork.ppid = ppid;
314 event->fork.ptid = ppid;
315 } else {
316 event->fork.ppid = tgid;
317 event->fork.ptid = tgid;
318 }
319 event->fork.pid = tgid;
320 event->fork.tid = pid;
321 event->fork.header.type = PERF_RECORD_FORK;
322 event->fork.header.misc = PERF_RECORD_MISC_FORK_EXEC;
323
324 event->fork.header.size = (sizeof(event->fork) + machine->id_hdr_size);
325
326 if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
327 return -1;
328
329 return 0;
330 }
331
332 int perf_event__synthesize_mmap_events(struct perf_tool *tool,
333 union perf_event *event,
334 pid_t pid, pid_t tgid,
335 perf_event__handler_t process,
336 struct machine *machine,
337 bool mmap_data)
338 {
339 char filename[PATH_MAX];
340 FILE *fp;
341 unsigned long long t;
342 bool truncation = false;
343 unsigned long long timeout = proc_map_timeout * 1000000ULL;
344 int rc = 0;
345 const char *hugetlbfs_mnt = hugetlbfs__mountpoint();
346 int hugetlbfs_mnt_len = hugetlbfs_mnt ? strlen(hugetlbfs_mnt) : 0;
347
348 if (machine__is_default_guest(machine))
349 return 0;
350
351 snprintf(filename, sizeof(filename), "%s/proc/%d/task/%d/maps",
352 machine->root_dir, pid, pid);
353
354 fp = fopen(filename, "r");
355 if (fp == NULL) {
356 /*
357 * We raced with a task exiting - just return:
358 */
359 pr_debug("couldn't open %s\n", filename);
360 return -1;
361 }
362
363 event->header.type = PERF_RECORD_MMAP2;
364 t = rdclock();
365
366 while (1) {
367 char bf[BUFSIZ];
368 char prot[5];
369 char execname[PATH_MAX];
370 char anonstr[] = "//anon";
371 unsigned int ino;
372 size_t size;
373 ssize_t n;
374
375 if (fgets(bf, sizeof(bf), fp) == NULL)
376 break;
377
378 if ((rdclock() - t) > timeout) {
379 pr_warning("Reading %s time out. "
380 "You may want to increase "
381 "the time limit by --proc-map-timeout\n",
382 filename);
383 truncation = true;
384 goto out;
385 }
386
387 /* ensure null termination since stack will be reused. */
388 strcpy(execname, "");
389
390 /* 00400000-0040c000 r-xp 00000000 fd:01 41038 /bin/cat */
391 n = sscanf(bf, "%"PRIx64"-%"PRIx64" %s %"PRIx64" %x:%x %u %[^\n]\n",
392 &event->mmap2.start, &event->mmap2.len, prot,
393 &event->mmap2.pgoff, &event->mmap2.maj,
394 &event->mmap2.min,
395 &ino, execname);
396
397 /*
398 * Anon maps don't have the execname.
399 */
400 if (n < 7)
401 continue;
402
403 event->mmap2.ino = (u64)ino;
404
405 /*
406 * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
407 */
408 if (machine__is_host(machine))
409 event->header.misc = PERF_RECORD_MISC_USER;
410 else
411 event->header.misc = PERF_RECORD_MISC_GUEST_USER;
412
413 /* map protection and flags bits */
414 event->mmap2.prot = 0;
415 event->mmap2.flags = 0;
416 if (prot[0] == 'r')
417 event->mmap2.prot |= PROT_READ;
418 if (prot[1] == 'w')
419 event->mmap2.prot |= PROT_WRITE;
420 if (prot[2] == 'x')
421 event->mmap2.prot |= PROT_EXEC;
422
423 if (prot[3] == 's')
424 event->mmap2.flags |= MAP_SHARED;
425 else
426 event->mmap2.flags |= MAP_PRIVATE;
427
428 if (prot[2] != 'x') {
429 if (!mmap_data || prot[0] != 'r')
430 continue;
431
432 event->header.misc |= PERF_RECORD_MISC_MMAP_DATA;
433 }
434
435 out:
436 if (truncation)
437 event->header.misc |= PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT;
438
439 if (!strcmp(execname, ""))
440 strcpy(execname, anonstr);
441
442 if (hugetlbfs_mnt_len &&
443 !strncmp(execname, hugetlbfs_mnt, hugetlbfs_mnt_len)) {
444 strcpy(execname, anonstr);
445 event->mmap2.flags |= MAP_HUGETLB;
446 }
447
448 size = strlen(execname) + 1;
449 memcpy(event->mmap2.filename, execname, size);
450 size = PERF_ALIGN(size, sizeof(u64));
451 event->mmap2.len -= event->mmap.start;
452 event->mmap2.header.size = (sizeof(event->mmap2) -
453 (sizeof(event->mmap2.filename) - size));
454 memset(event->mmap2.filename + size, 0, machine->id_hdr_size);
455 event->mmap2.header.size += machine->id_hdr_size;
456 event->mmap2.pid = tgid;
457 event->mmap2.tid = pid;
458
459 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
460 rc = -1;
461 break;
462 }
463
464 if (truncation)
465 break;
466 }
467
468 fclose(fp);
469 return rc;
470 }
471
472 int perf_event__synthesize_modules(struct perf_tool *tool,
473 perf_event__handler_t process,
474 struct machine *machine)
475 {
476 int rc = 0;
477 struct map *pos;
478 struct maps *maps = machine__kernel_maps(machine);
479 union perf_event *event = zalloc((sizeof(event->mmap) +
480 machine->id_hdr_size));
481 if (event == NULL) {
482 pr_debug("Not enough memory synthesizing mmap event "
483 "for kernel modules\n");
484 return -1;
485 }
486
487 event->header.type = PERF_RECORD_MMAP;
488
489 /*
490 * kernel uses 0 for user space maps, see kernel/perf_event.c
491 * __perf_event_mmap
492 */
493 if (machine__is_host(machine))
494 event->header.misc = PERF_RECORD_MISC_KERNEL;
495 else
496 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
497
498 for (pos = maps__first(maps); pos; pos = map__next(pos)) {
499 size_t size;
500
501 if (!__map__is_kmodule(pos))
502 continue;
503
504 size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
505 event->mmap.header.type = PERF_RECORD_MMAP;
506 event->mmap.header.size = (sizeof(event->mmap) -
507 (sizeof(event->mmap.filename) - size));
508 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
509 event->mmap.header.size += machine->id_hdr_size;
510 event->mmap.start = pos->start;
511 event->mmap.len = pos->end - pos->start;
512 event->mmap.pid = machine->pid;
513
514 memcpy(event->mmap.filename, pos->dso->long_name,
515 pos->dso->long_name_len + 1);
516 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
517 rc = -1;
518 break;
519 }
520 }
521
522 free(event);
523 return rc;
524 }
525
526 static int __event__synthesize_thread(union perf_event *comm_event,
527 union perf_event *mmap_event,
528 union perf_event *fork_event,
529 union perf_event *namespaces_event,
530 pid_t pid, int full,
531 perf_event__handler_t process,
532 struct perf_tool *tool,
533 struct machine *machine,
534 bool mmap_data)
535 {
536 char filename[PATH_MAX];
537 DIR *tasks;
538 struct dirent *dirent;
539 pid_t tgid, ppid;
540 int rc = 0;
541
542 /* special case: only send one comm event using passed in pid */
543 if (!full) {
544 tgid = perf_event__synthesize_comm(tool, comm_event, pid,
545 process, machine);
546
547 if (tgid == -1)
548 return -1;
549
550 if (perf_event__synthesize_namespaces(tool, namespaces_event, pid,
551 tgid, process, machine) < 0)
552 return -1;
553
554 /*
555 * send mmap only for thread group leader
556 * see thread__init_map_groups
557 */
558 if (pid == tgid &&
559 perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
560 process, machine, mmap_data))
561 return -1;
562
563 return 0;
564 }
565
566 if (machine__is_default_guest(machine))
567 return 0;
568
569 snprintf(filename, sizeof(filename), "%s/proc/%d/task",
570 machine->root_dir, pid);
571
572 tasks = opendir(filename);
573 if (tasks == NULL) {
574 pr_debug("couldn't open %s\n", filename);
575 return 0;
576 }
577
578 while ((dirent = readdir(tasks)) != NULL) {
579 char *end;
580 pid_t _pid;
581
582 _pid = strtol(dirent->d_name, &end, 10);
583 if (*end)
584 continue;
585
586 rc = -1;
587 if (perf_event__prepare_comm(comm_event, _pid, machine,
588 &tgid, &ppid) != 0)
589 break;
590
591 if (perf_event__synthesize_fork(tool, fork_event, _pid, tgid,
592 ppid, process, machine) < 0)
593 break;
594
595 if (perf_event__synthesize_namespaces(tool, namespaces_event, _pid,
596 tgid, process, machine) < 0)
597 break;
598
599 /*
600 * Send the prepared comm event
601 */
602 if (perf_tool__process_synth_event(tool, comm_event, machine, process) != 0)
603 break;
604
605 rc = 0;
606 if (_pid == pid) {
607 /* process the parent's maps too */
608 rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
609 process, machine, mmap_data);
610 if (rc)
611 break;
612 }
613 }
614
615 closedir(tasks);
616 return rc;
617 }
618
619 int perf_event__synthesize_thread_map(struct perf_tool *tool,
620 struct thread_map *threads,
621 perf_event__handler_t process,
622 struct machine *machine,
623 bool mmap_data)
624 {
625 union perf_event *comm_event, *mmap_event, *fork_event;
626 union perf_event *namespaces_event;
627 int err = -1, thread, j;
628
629 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
630 if (comm_event == NULL)
631 goto out;
632
633 mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
634 if (mmap_event == NULL)
635 goto out_free_comm;
636
637 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
638 if (fork_event == NULL)
639 goto out_free_mmap;
640
641 namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
642 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
643 machine->id_hdr_size);
644 if (namespaces_event == NULL)
645 goto out_free_fork;
646
647 err = 0;
648 for (thread = 0; thread < threads->nr; ++thread) {
649 if (__event__synthesize_thread(comm_event, mmap_event,
650 fork_event, namespaces_event,
651 thread_map__pid(threads, thread), 0,
652 process, tool, machine,
653 mmap_data)) {
654 err = -1;
655 break;
656 }
657
658 /*
659 * comm.pid is set to thread group id by
660 * perf_event__synthesize_comm
661 */
662 if ((int) comm_event->comm.pid != thread_map__pid(threads, thread)) {
663 bool need_leader = true;
664
665 /* is thread group leader in thread_map? */
666 for (j = 0; j < threads->nr; ++j) {
667 if ((int) comm_event->comm.pid == thread_map__pid(threads, j)) {
668 need_leader = false;
669 break;
670 }
671 }
672
673 /* if not, generate events for it */
674 if (need_leader &&
675 __event__synthesize_thread(comm_event, mmap_event,
676 fork_event, namespaces_event,
677 comm_event->comm.pid, 0,
678 process, tool, machine,
679 mmap_data)) {
680 err = -1;
681 break;
682 }
683 }
684 }
685 free(namespaces_event);
686 out_free_fork:
687 free(fork_event);
688 out_free_mmap:
689 free(mmap_event);
690 out_free_comm:
691 free(comm_event);
692 out:
693 return err;
694 }
695
696 static int __perf_event__synthesize_threads(struct perf_tool *tool,
697 perf_event__handler_t process,
698 struct machine *machine,
699 bool mmap_data,
700 struct dirent **dirent,
701 int start,
702 int num)
703 {
704 union perf_event *comm_event, *mmap_event, *fork_event;
705 union perf_event *namespaces_event;
706 int err = -1;
707 char *end;
708 pid_t pid;
709 int i;
710
711 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
712 if (comm_event == NULL)
713 goto out;
714
715 mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
716 if (mmap_event == NULL)
717 goto out_free_comm;
718
719 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
720 if (fork_event == NULL)
721 goto out_free_mmap;
722
723 namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
724 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
725 machine->id_hdr_size);
726 if (namespaces_event == NULL)
727 goto out_free_fork;
728
729 for (i = start; i < start + num; i++) {
730 if (!isdigit(dirent[i]->d_name[0]))
731 continue;
732
733 pid = (pid_t)strtol(dirent[i]->d_name, &end, 10);
734 /* only interested in proper numerical dirents */
735 if (*end)
736 continue;
737 /*
738 * We may race with exiting thread, so don't stop just because
739 * one thread couldn't be synthesized.
740 */
741 __event__synthesize_thread(comm_event, mmap_event, fork_event,
742 namespaces_event, pid, 1, process,
743 tool, machine, mmap_data);
744 }
745 err = 0;
746
747 free(namespaces_event);
748 out_free_fork:
749 free(fork_event);
750 out_free_mmap:
751 free(mmap_event);
752 out_free_comm:
753 free(comm_event);
754 out:
755 return err;
756 }
757
758 struct synthesize_threads_arg {
759 struct perf_tool *tool;
760 perf_event__handler_t process;
761 struct machine *machine;
762 bool mmap_data;
763 struct dirent **dirent;
764 int num;
765 int start;
766 };
767
768 static void *synthesize_threads_worker(void *arg)
769 {
770 struct synthesize_threads_arg *args = arg;
771
772 __perf_event__synthesize_threads(args->tool, args->process,
773 args->machine, args->mmap_data,
774 args->dirent,
775 args->start, args->num);
776 return NULL;
777 }
778
779 int perf_event__synthesize_threads(struct perf_tool *tool,
780 perf_event__handler_t process,
781 struct machine *machine,
782 bool mmap_data,
783 unsigned int nr_threads_synthesize)
784 {
785 struct synthesize_threads_arg *args = NULL;
786 pthread_t *synthesize_threads = NULL;
787 char proc_path[PATH_MAX];
788 struct dirent **dirent;
789 int num_per_thread;
790 int m, n, i, j;
791 int thread_nr;
792 int base = 0;
793 int err = -1;
794
795
796 if (machine__is_default_guest(machine))
797 return 0;
798
799 snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir);
800 n = scandir(proc_path, &dirent, 0, alphasort);
801 if (n < 0)
802 return err;
803
804 if (nr_threads_synthesize == UINT_MAX)
805 thread_nr = sysconf(_SC_NPROCESSORS_ONLN);
806 else
807 thread_nr = nr_threads_synthesize;
808
809 if (thread_nr <= 1) {
810 err = __perf_event__synthesize_threads(tool, process,
811 machine, mmap_data,
812 dirent, base, n);
813 goto free_dirent;
814 }
815 if (thread_nr > n)
816 thread_nr = n;
817
818 synthesize_threads = calloc(sizeof(pthread_t), thread_nr);
819 if (synthesize_threads == NULL)
820 goto free_dirent;
821
822 args = calloc(sizeof(*args), thread_nr);
823 if (args == NULL)
824 goto free_threads;
825
826 num_per_thread = n / thread_nr;
827 m = n % thread_nr;
828 for (i = 0; i < thread_nr; i++) {
829 args[i].tool = tool;
830 args[i].process = process;
831 args[i].machine = machine;
832 args[i].mmap_data = mmap_data;
833 args[i].dirent = dirent;
834 }
835 for (i = 0; i < m; i++) {
836 args[i].num = num_per_thread + 1;
837 args[i].start = i * args[i].num;
838 }
839 if (i != 0)
840 base = args[i-1].start + args[i-1].num;
841 for (j = i; j < thread_nr; j++) {
842 args[j].num = num_per_thread;
843 args[j].start = base + (j - i) * args[i].num;
844 }
845
846 for (i = 0; i < thread_nr; i++) {
847 if (pthread_create(&synthesize_threads[i], NULL,
848 synthesize_threads_worker, &args[i]))
849 goto out_join;
850 }
851 err = 0;
852 out_join:
853 for (i = 0; i < thread_nr; i++)
854 pthread_join(synthesize_threads[i], NULL);
855 free(args);
856 free_threads:
857 free(synthesize_threads);
858 free_dirent:
859 for (i = 0; i < n; i++)
860 free(dirent[i]);
861 free(dirent);
862
863 return err;
864 }
865
866 struct process_symbol_args {
867 const char *name;
868 u64 start;
869 };
870
871 static int find_symbol_cb(void *arg, const char *name, char type,
872 u64 start)
873 {
874 struct process_symbol_args *args = arg;
875
876 /*
877 * Must be a function or at least an alias, as in PARISC64, where "_text" is
878 * an 'A' to the same address as "_stext".
879 */
880 if (!(kallsyms__is_function(type) ||
881 type == 'A') || strcmp(name, args->name))
882 return 0;
883
884 args->start = start;
885 return 1;
886 }
887
888 int kallsyms__get_function_start(const char *kallsyms_filename,
889 const char *symbol_name, u64 *addr)
890 {
891 struct process_symbol_args args = { .name = symbol_name, };
892
893 if (kallsyms__parse(kallsyms_filename, &args, find_symbol_cb) <= 0)
894 return -1;
895
896 *addr = args.start;
897 return 0;
898 }
899
900 int __weak perf_event__synthesize_extra_kmaps(struct perf_tool *tool __maybe_unused,
901 perf_event__handler_t process __maybe_unused,
902 struct machine *machine __maybe_unused)
903 {
904 return 0;
905 }
906
907 static int __perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
908 perf_event__handler_t process,
909 struct machine *machine)
910 {
911 size_t size;
912 struct map *map = machine__kernel_map(machine);
913 struct kmap *kmap;
914 int err;
915 union perf_event *event;
916
917 if (symbol_conf.kptr_restrict)
918 return -1;
919 if (map == NULL)
920 return -1;
921
922 /*
923 * We should get this from /sys/kernel/sections/.text, but till that is
924 * available use this, and after it is use this as a fallback for older
925 * kernels.
926 */
927 event = zalloc((sizeof(event->mmap) + machine->id_hdr_size));
928 if (event == NULL) {
929 pr_debug("Not enough memory synthesizing mmap event "
930 "for kernel modules\n");
931 return -1;
932 }
933
934 if (machine__is_host(machine)) {
935 /*
936 * kernel uses PERF_RECORD_MISC_USER for user space maps,
937 * see kernel/perf_event.c __perf_event_mmap
938 */
939 event->header.misc = PERF_RECORD_MISC_KERNEL;
940 } else {
941 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
942 }
943
944 kmap = map__kmap(map);
945 size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
946 "%s%s", machine->mmap_name, kmap->ref_reloc_sym->name) + 1;
947 size = PERF_ALIGN(size, sizeof(u64));
948 event->mmap.header.type = PERF_RECORD_MMAP;
949 event->mmap.header.size = (sizeof(event->mmap) -
950 (sizeof(event->mmap.filename) - size) + machine->id_hdr_size);
951 event->mmap.pgoff = kmap->ref_reloc_sym->addr;
952 event->mmap.start = map->start;
953 event->mmap.len = map->end - event->mmap.start;
954 event->mmap.pid = machine->pid;
955
956 err = perf_tool__process_synth_event(tool, event, machine, process);
957 free(event);
958
959 return err;
960 }
961
962 int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
963 perf_event__handler_t process,
964 struct machine *machine)
965 {
966 int err;
967
968 err = __perf_event__synthesize_kernel_mmap(tool, process, machine);
969 if (err < 0)
970 return err;
971
972 return perf_event__synthesize_extra_kmaps(tool, process, machine);
973 }
974
975 int perf_event__synthesize_thread_map2(struct perf_tool *tool,
976 struct thread_map *threads,
977 perf_event__handler_t process,
978 struct machine *machine)
979 {
980 union perf_event *event;
981 int i, err, size;
982
983 size = sizeof(event->thread_map);
984 size += threads->nr * sizeof(event->thread_map.entries[0]);
985
986 event = zalloc(size);
987 if (!event)
988 return -ENOMEM;
989
990 event->header.type = PERF_RECORD_THREAD_MAP;
991 event->header.size = size;
992 event->thread_map.nr = threads->nr;
993
994 for (i = 0; i < threads->nr; i++) {
995 struct thread_map_event_entry *entry = &event->thread_map.entries[i];
996 char *comm = thread_map__comm(threads, i);
997
998 if (!comm)
999 comm = (char *) "";
1000
1001 entry->pid = thread_map__pid(threads, i);
1002 strncpy((char *) &entry->comm, comm, sizeof(entry->comm));
1003 }
1004
1005 err = process(tool, event, NULL, machine);
1006
1007 free(event);
1008 return err;
1009 }
1010
1011 static void synthesize_cpus(struct cpu_map_entries *cpus,
1012 struct cpu_map *map)
1013 {
1014 int i;
1015
1016 cpus->nr = map->nr;
1017
1018 for (i = 0; i < map->nr; i++)
1019 cpus->cpu[i] = map->map[i];
1020 }
1021
1022 static void synthesize_mask(struct cpu_map_mask *mask,
1023 struct cpu_map *map, int max)
1024 {
1025 int i;
1026
1027 mask->nr = BITS_TO_LONGS(max);
1028 mask->long_size = sizeof(long);
1029
1030 for (i = 0; i < map->nr; i++)
1031 set_bit(map->map[i], mask->mask);
1032 }
1033
1034 static size_t cpus_size(struct cpu_map *map)
1035 {
1036 return sizeof(struct cpu_map_entries) + map->nr * sizeof(u16);
1037 }
1038
1039 static size_t mask_size(struct cpu_map *map, int *max)
1040 {
1041 int i;
1042
1043 *max = 0;
1044
1045 for (i = 0; i < map->nr; i++) {
1046 /* bit possition of the cpu is + 1 */
1047 int bit = map->map[i] + 1;
1048
1049 if (bit > *max)
1050 *max = bit;
1051 }
1052
1053 return sizeof(struct cpu_map_mask) + BITS_TO_LONGS(*max) * sizeof(long);
1054 }
1055
1056 void *cpu_map_data__alloc(struct cpu_map *map, size_t *size, u16 *type, int *max)
1057 {
1058 size_t size_cpus, size_mask;
1059 bool is_dummy = cpu_map__empty(map);
1060
1061 /*
1062 * Both array and mask data have variable size based
1063 * on the number of cpus and their actual values.
1064 * The size of the 'struct cpu_map_data' is:
1065 *
1066 * array = size of 'struct cpu_map_entries' +
1067 * number of cpus * sizeof(u64)
1068 *
1069 * mask = size of 'struct cpu_map_mask' +
1070 * maximum cpu bit converted to size of longs
1071 *
1072 * and finaly + the size of 'struct cpu_map_data'.
1073 */
1074 size_cpus = cpus_size(map);
1075 size_mask = mask_size(map, max);
1076
1077 if (is_dummy || (size_cpus < size_mask)) {
1078 *size += size_cpus;
1079 *type = PERF_CPU_MAP__CPUS;
1080 } else {
1081 *size += size_mask;
1082 *type = PERF_CPU_MAP__MASK;
1083 }
1084
1085 *size += sizeof(struct cpu_map_data);
1086 *size = PERF_ALIGN(*size, sizeof(u64));
1087 return zalloc(*size);
1088 }
1089
1090 void cpu_map_data__synthesize(struct cpu_map_data *data, struct cpu_map *map,
1091 u16 type, int max)
1092 {
1093 data->type = type;
1094
1095 switch (type) {
1096 case PERF_CPU_MAP__CPUS:
1097 synthesize_cpus((struct cpu_map_entries *) data->data, map);
1098 break;
1099 case PERF_CPU_MAP__MASK:
1100 synthesize_mask((struct cpu_map_mask *) data->data, map, max);
1101 default:
1102 break;
1103 };
1104 }
1105
1106 static struct cpu_map_event* cpu_map_event__new(struct cpu_map *map)
1107 {
1108 size_t size = sizeof(struct cpu_map_event);
1109 struct cpu_map_event *event;
1110 int max;
1111 u16 type;
1112
1113 event = cpu_map_data__alloc(map, &size, &type, &max);
1114 if (!event)
1115 return NULL;
1116
1117 event->header.type = PERF_RECORD_CPU_MAP;
1118 event->header.size = size;
1119 event->data.type = type;
1120
1121 cpu_map_data__synthesize(&event->data, map, type, max);
1122 return event;
1123 }
1124
1125 int perf_event__synthesize_cpu_map(struct perf_tool *tool,
1126 struct cpu_map *map,
1127 perf_event__handler_t process,
1128 struct machine *machine)
1129 {
1130 struct cpu_map_event *event;
1131 int err;
1132
1133 event = cpu_map_event__new(map);
1134 if (!event)
1135 return -ENOMEM;
1136
1137 err = process(tool, (union perf_event *) event, NULL, machine);
1138
1139 free(event);
1140 return err;
1141 }
1142
1143 int perf_event__synthesize_stat_config(struct perf_tool *tool,
1144 struct perf_stat_config *config,
1145 perf_event__handler_t process,
1146 struct machine *machine)
1147 {
1148 struct stat_config_event *event;
1149 int size, i = 0, err;
1150
1151 size = sizeof(*event);
1152 size += (PERF_STAT_CONFIG_TERM__MAX * sizeof(event->data[0]));
1153
1154 event = zalloc(size);
1155 if (!event)
1156 return -ENOMEM;
1157
1158 event->header.type = PERF_RECORD_STAT_CONFIG;
1159 event->header.size = size;
1160 event->nr = PERF_STAT_CONFIG_TERM__MAX;
1161
1162 #define ADD(__term, __val) \
1163 event->data[i].tag = PERF_STAT_CONFIG_TERM__##__term; \
1164 event->data[i].val = __val; \
1165 i++;
1166
1167 ADD(AGGR_MODE, config->aggr_mode)
1168 ADD(INTERVAL, config->interval)
1169 ADD(SCALE, config->scale)
1170
1171 WARN_ONCE(i != PERF_STAT_CONFIG_TERM__MAX,
1172 "stat config terms unbalanced\n");
1173 #undef ADD
1174
1175 err = process(tool, (union perf_event *) event, NULL, machine);
1176
1177 free(event);
1178 return err;
1179 }
1180
1181 int perf_event__synthesize_stat(struct perf_tool *tool,
1182 u32 cpu, u32 thread, u64 id,
1183 struct perf_counts_values *count,
1184 perf_event__handler_t process,
1185 struct machine *machine)
1186 {
1187 struct stat_event event;
1188
1189 event.header.type = PERF_RECORD_STAT;
1190 event.header.size = sizeof(event);
1191 event.header.misc = 0;
1192
1193 event.id = id;
1194 event.cpu = cpu;
1195 event.thread = thread;
1196 event.val = count->val;
1197 event.ena = count->ena;
1198 event.run = count->run;
1199
1200 return process(tool, (union perf_event *) &event, NULL, machine);
1201 }
1202
1203 int perf_event__synthesize_stat_round(struct perf_tool *tool,
1204 u64 evtime, u64 type,
1205 perf_event__handler_t process,
1206 struct machine *machine)
1207 {
1208 struct stat_round_event event;
1209
1210 event.header.type = PERF_RECORD_STAT_ROUND;
1211 event.header.size = sizeof(event);
1212 event.header.misc = 0;
1213
1214 event.time = evtime;
1215 event.type = type;
1216
1217 return process(tool, (union perf_event *) &event, NULL, machine);
1218 }
1219
1220 void perf_event__read_stat_config(struct perf_stat_config *config,
1221 struct stat_config_event *event)
1222 {
1223 unsigned i;
1224
1225 for (i = 0; i < event->nr; i++) {
1226
1227 switch (event->data[i].tag) {
1228 #define CASE(__term, __val) \
1229 case PERF_STAT_CONFIG_TERM__##__term: \
1230 config->__val = event->data[i].val; \
1231 break;
1232
1233 CASE(AGGR_MODE, aggr_mode)
1234 CASE(SCALE, scale)
1235 CASE(INTERVAL, interval)
1236 #undef CASE
1237 default:
1238 pr_warning("unknown stat config term %" PRIu64 "\n",
1239 event->data[i].tag);
1240 }
1241 }
1242 }
1243
1244 size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
1245 {
1246 const char *s;
1247
1248 if (event->header.misc & PERF_RECORD_MISC_COMM_EXEC)
1249 s = " exec";
1250 else
1251 s = "";
1252
1253 return fprintf(fp, "%s: %s:%d/%d\n", s, event->comm.comm, event->comm.pid, event->comm.tid);
1254 }
1255
1256 size_t perf_event__fprintf_namespaces(union perf_event *event, FILE *fp)
1257 {
1258 size_t ret = 0;
1259 struct perf_ns_link_info *ns_link_info;
1260 u32 nr_namespaces, idx;
1261
1262 ns_link_info = event->namespaces.link_info;
1263 nr_namespaces = event->namespaces.nr_namespaces;
1264
1265 ret += fprintf(fp, " %d/%d - nr_namespaces: %u\n\t\t[",
1266 event->namespaces.pid,
1267 event->namespaces.tid,
1268 nr_namespaces);
1269
1270 for (idx = 0; idx < nr_namespaces; idx++) {
1271 if (idx && (idx % 4 == 0))
1272 ret += fprintf(fp, "\n\t\t ");
1273
1274 ret += fprintf(fp, "%u/%s: %" PRIu64 "/%#" PRIx64 "%s", idx,
1275 perf_ns__name(idx), (u64)ns_link_info[idx].dev,
1276 (u64)ns_link_info[idx].ino,
1277 ((idx + 1) != nr_namespaces) ? ", " : "]\n");
1278 }
1279
1280 return ret;
1281 }
1282
1283 int perf_event__process_comm(struct perf_tool *tool __maybe_unused,
1284 union perf_event *event,
1285 struct perf_sample *sample,
1286 struct machine *machine)
1287 {
1288 return machine__process_comm_event(machine, event, sample);
1289 }
1290
1291 int perf_event__process_namespaces(struct perf_tool *tool __maybe_unused,
1292 union perf_event *event,
1293 struct perf_sample *sample,
1294 struct machine *machine)
1295 {
1296 return machine__process_namespaces_event(machine, event, sample);
1297 }
1298
1299 int perf_event__process_lost(struct perf_tool *tool __maybe_unused,
1300 union perf_event *event,
1301 struct perf_sample *sample,
1302 struct machine *machine)
1303 {
1304 return machine__process_lost_event(machine, event, sample);
1305 }
1306
1307 int perf_event__process_aux(struct perf_tool *tool __maybe_unused,
1308 union perf_event *event,
1309 struct perf_sample *sample __maybe_unused,
1310 struct machine *machine)
1311 {
1312 return machine__process_aux_event(machine, event);
1313 }
1314
1315 int perf_event__process_itrace_start(struct perf_tool *tool __maybe_unused,
1316 union perf_event *event,
1317 struct perf_sample *sample __maybe_unused,
1318 struct machine *machine)
1319 {
1320 return machine__process_itrace_start_event(machine, event);
1321 }
1322
1323 int perf_event__process_lost_samples(struct perf_tool *tool __maybe_unused,
1324 union perf_event *event,
1325 struct perf_sample *sample,
1326 struct machine *machine)
1327 {
1328 return machine__process_lost_samples_event(machine, event, sample);
1329 }
1330
1331 int perf_event__process_switch(struct perf_tool *tool __maybe_unused,
1332 union perf_event *event,
1333 struct perf_sample *sample __maybe_unused,
1334 struct machine *machine)
1335 {
1336 return machine__process_switch_event(machine, event);
1337 }
1338
1339 int perf_event__process_ksymbol(struct perf_tool *tool __maybe_unused,
1340 union perf_event *event,
1341 struct perf_sample *sample __maybe_unused,
1342 struct machine *machine)
1343 {
1344 return machine__process_ksymbol(machine, event, sample);
1345 }
1346
1347 int perf_event__process_bpf_event(struct perf_tool *tool __maybe_unused,
1348 union perf_event *event,
1349 struct perf_sample *sample __maybe_unused,
1350 struct machine *machine)
1351 {
1352 return machine__process_bpf_event(machine, event, sample);
1353 }
1354
1355 size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
1356 {
1357 return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %c %s\n",
1358 event->mmap.pid, event->mmap.tid, event->mmap.start,
1359 event->mmap.len, event->mmap.pgoff,
1360 (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x',
1361 event->mmap.filename);
1362 }
1363
1364 size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp)
1365 {
1366 return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64
1367 " %02x:%02x %"PRIu64" %"PRIu64"]: %c%c%c%c %s\n",
1368 event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
1369 event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj,
1370 event->mmap2.min, event->mmap2.ino,
1371 event->mmap2.ino_generation,
1372 (event->mmap2.prot & PROT_READ) ? 'r' : '-',
1373 (event->mmap2.prot & PROT_WRITE) ? 'w' : '-',
1374 (event->mmap2.prot & PROT_EXEC) ? 'x' : '-',
1375 (event->mmap2.flags & MAP_SHARED) ? 's' : 'p',
1376 event->mmap2.filename);
1377 }
1378
1379 size_t perf_event__fprintf_thread_map(union perf_event *event, FILE *fp)
1380 {
1381 struct thread_map *threads = thread_map__new_event(&event->thread_map);
1382 size_t ret;
1383
1384 ret = fprintf(fp, " nr: ");
1385
1386 if (threads)
1387 ret += thread_map__fprintf(threads, fp);
1388 else
1389 ret += fprintf(fp, "failed to get threads from event\n");
1390
1391 thread_map__put(threads);
1392 return ret;
1393 }
1394
1395 size_t perf_event__fprintf_cpu_map(union perf_event *event, FILE *fp)
1396 {
1397 struct cpu_map *cpus = cpu_map__new_data(&event->cpu_map.data);
1398 size_t ret;
1399
1400 ret = fprintf(fp, ": ");
1401
1402 if (cpus)
1403 ret += cpu_map__fprintf(cpus, fp);
1404 else
1405 ret += fprintf(fp, "failed to get cpumap from event\n");
1406
1407 cpu_map__put(cpus);
1408 return ret;
1409 }
1410
1411 int perf_event__process_mmap(struct perf_tool *tool __maybe_unused,
1412 union perf_event *event,
1413 struct perf_sample *sample,
1414 struct machine *machine)
1415 {
1416 return machine__process_mmap_event(machine, event, sample);
1417 }
1418
1419 int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused,
1420 union perf_event *event,
1421 struct perf_sample *sample,
1422 struct machine *machine)
1423 {
1424 return machine__process_mmap2_event(machine, event, sample);
1425 }
1426
1427 size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
1428 {
1429 return fprintf(fp, "(%d:%d):(%d:%d)\n",
1430 event->fork.pid, event->fork.tid,
1431 event->fork.ppid, event->fork.ptid);
1432 }
1433
1434 int perf_event__process_fork(struct perf_tool *tool __maybe_unused,
1435 union perf_event *event,
1436 struct perf_sample *sample,
1437 struct machine *machine)
1438 {
1439 return machine__process_fork_event(machine, event, sample);
1440 }
1441
1442 int perf_event__process_exit(struct perf_tool *tool __maybe_unused,
1443 union perf_event *event,
1444 struct perf_sample *sample,
1445 struct machine *machine)
1446 {
1447 return machine__process_exit_event(machine, event, sample);
1448 }
1449
1450 size_t perf_event__fprintf_aux(union perf_event *event, FILE *fp)
1451 {
1452 return fprintf(fp, " offset: %#"PRIx64" size: %#"PRIx64" flags: %#"PRIx64" [%s%s%s]\n",
1453 event->aux.aux_offset, event->aux.aux_size,
1454 event->aux.flags,
1455 event->aux.flags & PERF_AUX_FLAG_TRUNCATED ? "T" : "",
1456 event->aux.flags & PERF_AUX_FLAG_OVERWRITE ? "O" : "",
1457 event->aux.flags & PERF_AUX_FLAG_PARTIAL ? "P" : "");
1458 }
1459
1460 size_t perf_event__fprintf_itrace_start(union perf_event *event, FILE *fp)
1461 {
1462 return fprintf(fp, " pid: %u tid: %u\n",
1463 event->itrace_start.pid, event->itrace_start.tid);
1464 }
1465
1466 size_t perf_event__fprintf_switch(union perf_event *event, FILE *fp)
1467 {
1468 bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT;
1469 const char *in_out = !out ? "IN " :
1470 !(event->header.misc & PERF_RECORD_MISC_SWITCH_OUT_PREEMPT) ?
1471 "OUT " : "OUT preempt";
1472
1473 if (event->header.type == PERF_RECORD_SWITCH)
1474 return fprintf(fp, " %s\n", in_out);
1475
1476 return fprintf(fp, " %s %s pid/tid: %5u/%-5u\n",
1477 in_out, out ? "next" : "prev",
1478 event->context_switch.next_prev_pid,
1479 event->context_switch.next_prev_tid);
1480 }
1481
1482 static size_t perf_event__fprintf_lost(union perf_event *event, FILE *fp)
1483 {
1484 return fprintf(fp, " lost %" PRIu64 "\n", event->lost.lost);
1485 }
1486
1487 size_t perf_event__fprintf_ksymbol(union perf_event *event, FILE *fp)
1488 {
1489 return fprintf(fp, " addr %" PRIx64 " len %u type %u flags 0x%x name %s\n",
1490 event->ksymbol_event.addr, event->ksymbol_event.len,
1491 event->ksymbol_event.ksym_type,
1492 event->ksymbol_event.flags, event->ksymbol_event.name);
1493 }
1494
1495 size_t perf_event__fprintf_bpf_event(union perf_event *event, FILE *fp)
1496 {
1497 return fprintf(fp, " type %u, flags %u, id %u\n",
1498 event->bpf_event.type, event->bpf_event.flags,
1499 event->bpf_event.id);
1500 }
1501
1502 size_t perf_event__fprintf(union perf_event *event, FILE *fp)
1503 {
1504 size_t ret = fprintf(fp, "PERF_RECORD_%s",
1505 perf_event__name(event->header.type));
1506
1507 switch (event->header.type) {
1508 case PERF_RECORD_COMM:
1509 ret += perf_event__fprintf_comm(event, fp);
1510 break;
1511 case PERF_RECORD_FORK:
1512 case PERF_RECORD_EXIT:
1513 ret += perf_event__fprintf_task(event, fp);
1514 break;
1515 case PERF_RECORD_MMAP:
1516 ret += perf_event__fprintf_mmap(event, fp);
1517 break;
1518 case PERF_RECORD_NAMESPACES:
1519 ret += perf_event__fprintf_namespaces(event, fp);
1520 break;
1521 case PERF_RECORD_MMAP2:
1522 ret += perf_event__fprintf_mmap2(event, fp);
1523 break;
1524 case PERF_RECORD_AUX:
1525 ret += perf_event__fprintf_aux(event, fp);
1526 break;
1527 case PERF_RECORD_ITRACE_START:
1528 ret += perf_event__fprintf_itrace_start(event, fp);
1529 break;
1530 case PERF_RECORD_SWITCH:
1531 case PERF_RECORD_SWITCH_CPU_WIDE:
1532 ret += perf_event__fprintf_switch(event, fp);
1533 break;
1534 case PERF_RECORD_LOST:
1535 ret += perf_event__fprintf_lost(event, fp);
1536 break;
1537 case PERF_RECORD_KSYMBOL:
1538 ret += perf_event__fprintf_ksymbol(event, fp);
1539 break;
1540 case PERF_RECORD_BPF_EVENT:
1541 ret += perf_event__fprintf_bpf_event(event, fp);
1542 break;
1543 default:
1544 ret += fprintf(fp, "\n");
1545 }
1546
1547 return ret;
1548 }
1549
1550 int perf_event__process(struct perf_tool *tool __maybe_unused,
1551 union perf_event *event,
1552 struct perf_sample *sample,
1553 struct machine *machine)
1554 {
1555 return machine__process_event(machine, event, sample);
1556 }
1557
1558 struct map *thread__find_map(struct thread *thread, u8 cpumode, u64 addr,
1559 struct addr_location *al)
1560 {
1561 struct map_groups *mg = thread->mg;
1562 struct machine *machine = mg->machine;
1563 bool load_map = false;
1564
1565 al->machine = machine;
1566 al->thread = thread;
1567 al->addr = addr;
1568 al->cpumode = cpumode;
1569 al->filtered = 0;
1570
1571 if (machine == NULL) {
1572 al->map = NULL;
1573 return NULL;
1574 }
1575
1576 if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
1577 al->level = 'k';
1578 mg = &machine->kmaps;
1579 load_map = true;
1580 } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
1581 al->level = '.';
1582 } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
1583 al->level = 'g';
1584 mg = &machine->kmaps;
1585 load_map = true;
1586 } else if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) {
1587 al->level = 'u';
1588 } else {
1589 al->level = 'H';
1590 al->map = NULL;
1591
1592 if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
1593 cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
1594 !perf_guest)
1595 al->filtered |= (1 << HIST_FILTER__GUEST);
1596 if ((cpumode == PERF_RECORD_MISC_USER ||
1597 cpumode == PERF_RECORD_MISC_KERNEL) &&
1598 !perf_host)
1599 al->filtered |= (1 << HIST_FILTER__HOST);
1600
1601 return NULL;
1602 }
1603
1604 al->map = map_groups__find(mg, al->addr);
1605 if (al->map != NULL) {
1606 /*
1607 * Kernel maps might be changed when loading symbols so loading
1608 * must be done prior to using kernel maps.
1609 */
1610 if (load_map)
1611 map__load(al->map);
1612 al->addr = al->map->map_ip(al->map, al->addr);
1613 }
1614
1615 return al->map;
1616 }
1617
1618 /*
1619 * For branch stacks or branch samples, the sample cpumode might not be correct
1620 * because it applies only to the sample 'ip' and not necessary to 'addr' or
1621 * branch stack addresses. If possible, use a fallback to deal with those cases.
1622 */
1623 struct map *thread__find_map_fb(struct thread *thread, u8 cpumode, u64 addr,
1624 struct addr_location *al)
1625 {
1626 struct map *map = thread__find_map(thread, cpumode, addr, al);
1627 struct machine *machine = thread->mg->machine;
1628 u8 addr_cpumode = machine__addr_cpumode(machine, cpumode, addr);
1629
1630 if (map || addr_cpumode == cpumode)
1631 return map;
1632
1633 return thread__find_map(thread, addr_cpumode, addr, al);
1634 }
1635
1636 struct symbol *thread__find_symbol(struct thread *thread, u8 cpumode,
1637 u64 addr, struct addr_location *al)
1638 {
1639 al->sym = NULL;
1640 if (thread__find_map(thread, cpumode, addr, al))
1641 al->sym = map__find_symbol(al->map, al->addr);
1642 return al->sym;
1643 }
1644
1645 struct symbol *thread__find_symbol_fb(struct thread *thread, u8 cpumode,
1646 u64 addr, struct addr_location *al)
1647 {
1648 al->sym = NULL;
1649 if (thread__find_map_fb(thread, cpumode, addr, al))
1650 al->sym = map__find_symbol(al->map, al->addr);
1651 return al->sym;
1652 }
1653
1654 /*
1655 * Callers need to drop the reference to al->thread, obtained in
1656 * machine__findnew_thread()
1657 */
1658 int machine__resolve(struct machine *machine, struct addr_location *al,
1659 struct perf_sample *sample)
1660 {
1661 struct thread *thread = machine__findnew_thread(machine, sample->pid,
1662 sample->tid);
1663
1664 if (thread == NULL)
1665 return -1;
1666
1667 dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
1668 thread__find_map(thread, sample->cpumode, sample->ip, al);
1669 dump_printf(" ...... dso: %s\n",
1670 al->map ? al->map->dso->long_name :
1671 al->level == 'H' ? "[hypervisor]" : "<not found>");
1672
1673 if (thread__is_filtered(thread))
1674 al->filtered |= (1 << HIST_FILTER__THREAD);
1675
1676 al->sym = NULL;
1677 al->cpu = sample->cpu;
1678 al->socket = -1;
1679 al->srcline = NULL;
1680
1681 if (al->cpu >= 0) {
1682 struct perf_env *env = machine->env;
1683
1684 if (env && env->cpu)
1685 al->socket = env->cpu[al->cpu].socket_id;
1686 }
1687
1688 if (al->map) {
1689 struct dso *dso = al->map->dso;
1690
1691 if (symbol_conf.dso_list &&
1692 (!dso || !(strlist__has_entry(symbol_conf.dso_list,
1693 dso->short_name) ||
1694 (dso->short_name != dso->long_name &&
1695 strlist__has_entry(symbol_conf.dso_list,
1696 dso->long_name))))) {
1697 al->filtered |= (1 << HIST_FILTER__DSO);
1698 }
1699
1700 al->sym = map__find_symbol(al->map, al->addr);
1701 }
1702
1703 if (symbol_conf.sym_list &&
1704 (!al->sym || !strlist__has_entry(symbol_conf.sym_list,
1705 al->sym->name))) {
1706 al->filtered |= (1 << HIST_FILTER__SYMBOL);
1707 }
1708
1709 return 0;
1710 }
1711
1712 /*
1713 * The preprocess_sample method will return with reference counts for the
1714 * in it, when done using (and perhaps getting ref counts if needing to
1715 * keep a pointer to one of those entries) it must be paired with
1716 * addr_location__put(), so that the refcounts can be decremented.
1717 */
1718 void addr_location__put(struct addr_location *al)
1719 {
1720 thread__zput(al->thread);
1721 }
1722
1723 bool is_bts_event(struct perf_event_attr *attr)
1724 {
1725 return attr->type == PERF_TYPE_HARDWARE &&
1726 (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) &&
1727 attr->sample_period == 1;
1728 }
1729
1730 bool sample_addr_correlates_sym(struct perf_event_attr *attr)
1731 {
1732 if (attr->type == PERF_TYPE_SOFTWARE &&
1733 (attr->config == PERF_COUNT_SW_PAGE_FAULTS ||
1734 attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
1735 attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ))
1736 return true;
1737
1738 if (is_bts_event(attr))
1739 return true;
1740
1741 return false;
1742 }
1743
1744 void thread__resolve(struct thread *thread, struct addr_location *al,
1745 struct perf_sample *sample)
1746 {
1747 thread__find_map_fb(thread, sample->cpumode, sample->addr, al);
1748
1749 al->cpu = sample->cpu;
1750 al->sym = NULL;
1751
1752 if (al->map)
1753 al->sym = map__find_symbol(al->map, al->addr);
1754 }
Linux with added FPC-III support