?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[cris-mirror.git] / tools / perf / util / event.c
blob44e603c2794493366c75676b73b298723c94b70f
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 static 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 map_groups *kmaps = &machine->kmaps;
468 struct maps *maps = &kmaps->maps[MAP__FUNCTION];
469 union perf_event *event = zalloc((sizeof(event->mmap) +
470 machine->id_hdr_size));
471 if (event == NULL) {
472 pr_debug("Not enough memory synthesizing mmap event "
473 "for kernel modules\n");
474 return -1;
475 }
476
477 event->header.type = PERF_RECORD_MMAP;
478
479 /*
480 * kernel uses 0 for user space maps, see kernel/perf_event.c
481 * __perf_event_mmap
482 */
483 if (machine__is_host(machine))
484 event->header.misc = PERF_RECORD_MISC_KERNEL;
485 else
486 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
487
488 for (pos = maps__first(maps); pos; pos = map__next(pos)) {
489 size_t size;
490
491 if (__map__is_kernel(pos))
492 continue;
493
494 size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
495 event->mmap.header.type = PERF_RECORD_MMAP;
496 event->mmap.header.size = (sizeof(event->mmap) -
497 (sizeof(event->mmap.filename) - size));
498 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
499 event->mmap.header.size += machine->id_hdr_size;
500 event->mmap.start = pos->start;
501 event->mmap.len = pos->end - pos->start;
502 event->mmap.pid = machine->pid;
503
504 memcpy(event->mmap.filename, pos->dso->long_name,
505 pos->dso->long_name_len + 1);
506 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
507 rc = -1;
508 break;
509 }
510 }
511
512 free(event);
513 return rc;
514 }
515
516 static int __event__synthesize_thread(union perf_event *comm_event,
517 union perf_event *mmap_event,
518 union perf_event *fork_event,
519 union perf_event *namespaces_event,
520 pid_t pid, int full,
521 perf_event__handler_t process,
522 struct perf_tool *tool,
523 struct machine *machine,
524 bool mmap_data,
525 unsigned int proc_map_timeout)
526 {
527 char filename[PATH_MAX];
528 DIR *tasks;
529 struct dirent *dirent;
530 pid_t tgid, ppid;
531 int rc = 0;
532
533 /* special case: only send one comm event using passed in pid */
534 if (!full) {
535 tgid = perf_event__synthesize_comm(tool, comm_event, pid,
536 process, machine);
537
538 if (tgid == -1)
539 return -1;
540
541 if (perf_event__synthesize_namespaces(tool, namespaces_event, pid,
542 tgid, process, machine) < 0)
543 return -1;
544
545
546 return perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
547 process, machine, mmap_data,
548 proc_map_timeout);
549 }
550
551 if (machine__is_default_guest(machine))
552 return 0;
553
554 snprintf(filename, sizeof(filename), "%s/proc/%d/task",
555 machine->root_dir, pid);
556
557 tasks = opendir(filename);
558 if (tasks == NULL) {
559 pr_debug("couldn't open %s\n", filename);
560 return 0;
561 }
562
563 while ((dirent = readdir(tasks)) != NULL) {
564 char *end;
565 pid_t _pid;
566
567 _pid = strtol(dirent->d_name, &end, 10);
568 if (*end)
569 continue;
570
571 rc = -1;
572 if (perf_event__prepare_comm(comm_event, _pid, machine,
573 &tgid, &ppid) != 0)
574 break;
575
576 if (perf_event__synthesize_fork(tool, fork_event, _pid, tgid,
577 ppid, process, machine) < 0)
578 break;
579
580 if (perf_event__synthesize_namespaces(tool, namespaces_event, _pid,
581 tgid, process, machine) < 0)
582 break;
583
584 /*
585 * Send the prepared comm event
586 */
587 if (perf_tool__process_synth_event(tool, comm_event, machine, process) != 0)
588 break;
589
590 rc = 0;
591 if (_pid == pid) {
592 /* process the parent's maps too */
593 rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
594 process, machine, mmap_data, proc_map_timeout);
595 if (rc)
596 break;
597 }
598 }
599
600 closedir(tasks);
601 return rc;
602 }
603
604 int perf_event__synthesize_thread_map(struct perf_tool *tool,
605 struct thread_map *threads,
606 perf_event__handler_t process,
607 struct machine *machine,
608 bool mmap_data,
609 unsigned int proc_map_timeout)
610 {
611 union perf_event *comm_event, *mmap_event, *fork_event;
612 union perf_event *namespaces_event;
613 int err = -1, thread, j;
614
615 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
616 if (comm_event == NULL)
617 goto out;
618
619 mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
620 if (mmap_event == NULL)
621 goto out_free_comm;
622
623 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
624 if (fork_event == NULL)
625 goto out_free_mmap;
626
627 namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
628 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
629 machine->id_hdr_size);
630 if (namespaces_event == NULL)
631 goto out_free_fork;
632
633 err = 0;
634 for (thread = 0; thread < threads->nr; ++thread) {
635 if (__event__synthesize_thread(comm_event, mmap_event,
636 fork_event, namespaces_event,
637 thread_map__pid(threads, thread), 0,
638 process, tool, machine,
639 mmap_data, proc_map_timeout)) {
640 err = -1;
641 break;
642 }
643
644 /*
645 * comm.pid is set to thread group id by
646 * perf_event__synthesize_comm
647 */
648 if ((int) comm_event->comm.pid != thread_map__pid(threads, thread)) {
649 bool need_leader = true;
650
651 /* is thread group leader in thread_map? */
652 for (j = 0; j < threads->nr; ++j) {
653 if ((int) comm_event->comm.pid == thread_map__pid(threads, j)) {
654 need_leader = false;
655 break;
656 }
657 }
658
659 /* if not, generate events for it */
660 if (need_leader &&
661 __event__synthesize_thread(comm_event, mmap_event,
662 fork_event, namespaces_event,
663 comm_event->comm.pid, 0,
664 process, tool, machine,
665 mmap_data, proc_map_timeout)) {
666 err = -1;
667 break;
668 }
669 }
670 }
671 free(namespaces_event);
672 out_free_fork:
673 free(fork_event);
674 out_free_mmap:
675 free(mmap_event);
676 out_free_comm:
677 free(comm_event);
678 out:
679 return err;
680 }
681
682 static int __perf_event__synthesize_threads(struct perf_tool *tool,
683 perf_event__handler_t process,
684 struct machine *machine,
685 bool mmap_data,
686 unsigned int proc_map_timeout,
687 struct dirent **dirent,
688 int start,
689 int num)
690 {
691 union perf_event *comm_event, *mmap_event, *fork_event;
692 union perf_event *namespaces_event;
693 int err = -1;
694 char *end;
695 pid_t pid;
696 int i;
697
698 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
699 if (comm_event == NULL)
700 goto out;
701
702 mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
703 if (mmap_event == NULL)
704 goto out_free_comm;
705
706 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
707 if (fork_event == NULL)
708 goto out_free_mmap;
709
710 namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
711 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
712 machine->id_hdr_size);
713 if (namespaces_event == NULL)
714 goto out_free_fork;
715
716 for (i = start; i < start + num; i++) {
717 if (!isdigit(dirent[i]->d_name[0]))
718 continue;
719
720 pid = (pid_t)strtol(dirent[i]->d_name, &end, 10);
721 /* only interested in proper numerical dirents */
722 if (*end)
723 continue;
724 /*
725 * We may race with exiting thread, so don't stop just because
726 * one thread couldn't be synthesized.
727 */
728 __event__synthesize_thread(comm_event, mmap_event, fork_event,
729 namespaces_event, pid, 1, process,
730 tool, machine, mmap_data,
731 proc_map_timeout);
732 }
733 err = 0;
734
735 free(namespaces_event);
736 out_free_fork:
737 free(fork_event);
738 out_free_mmap:
739 free(mmap_event);
740 out_free_comm:
741 free(comm_event);
742 out:
743 return err;
744 }
745
746 struct synthesize_threads_arg {
747 struct perf_tool *tool;
748 perf_event__handler_t process;
749 struct machine *machine;
750 bool mmap_data;
751 unsigned int proc_map_timeout;
752 struct dirent **dirent;
753 int num;
754 int start;
755 };
756
757 static void *synthesize_threads_worker(void *arg)
758 {
759 struct synthesize_threads_arg *args = arg;
760
761 __perf_event__synthesize_threads(args->tool, args->process,
762 args->machine, args->mmap_data,
763 args->proc_map_timeout, args->dirent,
764 args->start, args->num);
765 return NULL;
766 }
767
768 int perf_event__synthesize_threads(struct perf_tool *tool,
769 perf_event__handler_t process,
770 struct machine *machine,
771 bool mmap_data,
772 unsigned int proc_map_timeout,
773 unsigned int nr_threads_synthesize)
774 {
775 struct synthesize_threads_arg *args = NULL;
776 pthread_t *synthesize_threads = NULL;
777 char proc_path[PATH_MAX];
778 struct dirent **dirent;
779 int num_per_thread;
780 int m, n, i, j;
781 int thread_nr;
782 int base = 0;
783 int err = -1;
784
785
786 if (machine__is_default_guest(machine))
787 return 0;
788
789 snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir);
790 n = scandir(proc_path, &dirent, 0, alphasort);
791 if (n < 0)
792 return err;
793
794 if (nr_threads_synthesize == UINT_MAX)
795 thread_nr = sysconf(_SC_NPROCESSORS_ONLN);
796 else
797 thread_nr = nr_threads_synthesize;
798
799 if (thread_nr <= 1) {
800 err = __perf_event__synthesize_threads(tool, process,
801 machine, mmap_data,
802 proc_map_timeout,
803 dirent, base, n);
804 goto free_dirent;
805 }
806 if (thread_nr > n)
807 thread_nr = n;
808
809 synthesize_threads = calloc(sizeof(pthread_t), thread_nr);
810 if (synthesize_threads == NULL)
811 goto free_dirent;
812
813 args = calloc(sizeof(*args), thread_nr);
814 if (args == NULL)
815 goto free_threads;
816
817 num_per_thread = n / thread_nr;
818 m = n % thread_nr;
819 for (i = 0; i < thread_nr; i++) {
820 args[i].tool = tool;
821 args[i].process = process;
822 args[i].machine = machine;
823 args[i].mmap_data = mmap_data;
824 args[i].proc_map_timeout = proc_map_timeout;
825 args[i].dirent = dirent;
826 }
827 for (i = 0; i < m; i++) {
828 args[i].num = num_per_thread + 1;
829 args[i].start = i * args[i].num;
830 }
831 if (i != 0)
832 base = args[i-1].start + args[i-1].num;
833 for (j = i; j < thread_nr; j++) {
834 args[j].num = num_per_thread;
835 args[j].start = base + (j - i) * args[i].num;
836 }
837
838 for (i = 0; i < thread_nr; i++) {
839 if (pthread_create(&synthesize_threads[i], NULL,
840 synthesize_threads_worker, &args[i]))
841 goto out_join;
842 }
843 err = 0;
844 out_join:
845 for (i = 0; i < thread_nr; i++)
846 pthread_join(synthesize_threads[i], NULL);
847 free(args);
848 free_threads:
849 free(synthesize_threads);
850 free_dirent:
851 for (i = 0; i < n; i++)
852 free(dirent[i]);
853 free(dirent);
854
855 return err;
856 }
857
858 struct process_symbol_args {
859 const char *name;
860 u64 start;
861 };
862
863 static int find_symbol_cb(void *arg, const char *name, char type,
864 u64 start)
865 {
866 struct process_symbol_args *args = arg;
867
868 /*
869 * Must be a function or at least an alias, as in PARISC64, where "_text" is
870 * an 'A' to the same address as "_stext".
871 */
872 if (!(symbol_type__is_a(type, MAP__FUNCTION) ||
873 type == 'A') || strcmp(name, args->name))
874 return 0;
875
876 args->start = start;
877 return 1;
878 }
879
880 int kallsyms__get_function_start(const char *kallsyms_filename,
881 const char *symbol_name, u64 *addr)
882 {
883 struct process_symbol_args args = { .name = symbol_name, };
884
885 if (kallsyms__parse(kallsyms_filename, &args, find_symbol_cb) <= 0)
886 return -1;
887
888 *addr = args.start;
889 return 0;
890 }
891
892 int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
893 perf_event__handler_t process,
894 struct machine *machine)
895 {
896 size_t size;
897 const char *mmap_name;
898 char name_buff[PATH_MAX];
899 struct map *map = machine__kernel_map(machine);
900 struct kmap *kmap;
901 int err;
902 union perf_event *event;
903
904 if (symbol_conf.kptr_restrict)
905 return -1;
906 if (map == NULL)
907 return -1;
908
909 /*
910 * We should get this from /sys/kernel/sections/.text, but till that is
911 * available use this, and after it is use this as a fallback for older
912 * kernels.
913 */
914 event = zalloc((sizeof(event->mmap) + machine->id_hdr_size));
915 if (event == NULL) {
916 pr_debug("Not enough memory synthesizing mmap event "
917 "for kernel modules\n");
918 return -1;
919 }
920
921 mmap_name = machine__mmap_name(machine, name_buff, sizeof(name_buff));
922 if (machine__is_host(machine)) {
923 /*
924 * kernel uses PERF_RECORD_MISC_USER for user space maps,
925 * see kernel/perf_event.c __perf_event_mmap
926 */
927 event->header.misc = PERF_RECORD_MISC_KERNEL;
928 } else {
929 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
930 }
931
932 kmap = map__kmap(map);
933 size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
934 "%s%s", mmap_name, kmap->ref_reloc_sym->name) + 1;
935 size = PERF_ALIGN(size, sizeof(u64));
936 event->mmap.header.type = PERF_RECORD_MMAP;
937 event->mmap.header.size = (sizeof(event->mmap) -
938 (sizeof(event->mmap.filename) - size) + machine->id_hdr_size);
939 event->mmap.pgoff = kmap->ref_reloc_sym->addr;
940 event->mmap.start = map->start;
941 event->mmap.len = map->end - event->mmap.start;
942 event->mmap.pid = machine->pid;
943
944 err = perf_tool__process_synth_event(tool, event, machine, process);
945 free(event);
946
947 return err;
948 }
949
950 int perf_event__synthesize_thread_map2(struct perf_tool *tool,
951 struct thread_map *threads,
952 perf_event__handler_t process,
953 struct machine *machine)
954 {
955 union perf_event *event;
956 int i, err, size;
957
958 size = sizeof(event->thread_map);
959 size += threads->nr * sizeof(event->thread_map.entries[0]);
960
961 event = zalloc(size);
962 if (!event)
963 return -ENOMEM;
964
965 event->header.type = PERF_RECORD_THREAD_MAP;
966 event->header.size = size;
967 event->thread_map.nr = threads->nr;
968
969 for (i = 0; i < threads->nr; i++) {
970 struct thread_map_event_entry *entry = &event->thread_map.entries[i];
971 char *comm = thread_map__comm(threads, i);
972
973 if (!comm)
974 comm = (char *) "";
975
976 entry->pid = thread_map__pid(threads, i);
977 strncpy((char *) &entry->comm, comm, sizeof(entry->comm));
978 }
979
980 err = process(tool, event, NULL, machine);
981
982 free(event);
983 return err;
984 }
985
986 static void synthesize_cpus(struct cpu_map_entries *cpus,
987 struct cpu_map *map)
988 {
989 int i;
990
991 cpus->nr = map->nr;
992
993 for (i = 0; i < map->nr; i++)
994 cpus->cpu[i] = map->map[i];
995 }
996
997 static void synthesize_mask(struct cpu_map_mask *mask,
998 struct cpu_map *map, int max)
999 {
1000 int i;
1001
1002 mask->nr = BITS_TO_LONGS(max);
1003 mask->long_size = sizeof(long);
1004
1005 for (i = 0; i < map->nr; i++)
1006 set_bit(map->map[i], mask->mask);
1007 }
1008
1009 static size_t cpus_size(struct cpu_map *map)
1010 {
1011 return sizeof(struct cpu_map_entries) + map->nr * sizeof(u16);
1012 }
1013
1014 static size_t mask_size(struct cpu_map *map, int *max)
1015 {
1016 int i;
1017
1018 *max = 0;
1019
1020 for (i = 0; i < map->nr; i++) {
1021 /* bit possition of the cpu is + 1 */
1022 int bit = map->map[i] + 1;
1023
1024 if (bit > *max)
1025 *max = bit;
1026 }
1027
1028 return sizeof(struct cpu_map_mask) + BITS_TO_LONGS(*max) * sizeof(long);
1029 }
1030
1031 void *cpu_map_data__alloc(struct cpu_map *map, size_t *size, u16 *type, int *max)
1032 {
1033 size_t size_cpus, size_mask;
1034 bool is_dummy = cpu_map__empty(map);
1035
1036 /*
1037 * Both array and mask data have variable size based
1038 * on the number of cpus and their actual values.
1039 * The size of the 'struct cpu_map_data' is:
1040 *
1041 * array = size of 'struct cpu_map_entries' +
1042 * number of cpus * sizeof(u64)
1043 *
1044 * mask = size of 'struct cpu_map_mask' +
1045 * maximum cpu bit converted to size of longs
1046 *
1047 * and finaly + the size of 'struct cpu_map_data'.
1048 */
1049 size_cpus = cpus_size(map);
1050 size_mask = mask_size(map, max);
1051
1052 if (is_dummy || (size_cpus < size_mask)) {
1053 *size += size_cpus;
1054 *type = PERF_CPU_MAP__CPUS;
1055 } else {
1056 *size += size_mask;
1057 *type = PERF_CPU_MAP__MASK;
1058 }
1059
1060 *size += sizeof(struct cpu_map_data);
1061 return zalloc(*size);
1062 }
1063
1064 void cpu_map_data__synthesize(struct cpu_map_data *data, struct cpu_map *map,
1065 u16 type, int max)
1066 {
1067 data->type = type;
1068
1069 switch (type) {
1070 case PERF_CPU_MAP__CPUS:
1071 synthesize_cpus((struct cpu_map_entries *) data->data, map);
1072 break;
1073 case PERF_CPU_MAP__MASK:
1074 synthesize_mask((struct cpu_map_mask *) data->data, map, max);
1075 default:
1076 break;
1077 };
1078 }
1079
1080 static struct cpu_map_event* cpu_map_event__new(struct cpu_map *map)
1081 {
1082 size_t size = sizeof(struct cpu_map_event);
1083 struct cpu_map_event *event;
1084 int max;
1085 u16 type;
1086
1087 event = cpu_map_data__alloc(map, &size, &type, &max);
1088 if (!event)
1089 return NULL;
1090
1091 event->header.type = PERF_RECORD_CPU_MAP;
1092 event->header.size = size;
1093 event->data.type = type;
1094
1095 cpu_map_data__synthesize(&event->data, map, type, max);
1096 return event;
1097 }
1098
1099 int perf_event__synthesize_cpu_map(struct perf_tool *tool,
1100 struct cpu_map *map,
1101 perf_event__handler_t process,
1102 struct machine *machine)
1103 {
1104 struct cpu_map_event *event;
1105 int err;
1106
1107 event = cpu_map_event__new(map);
1108 if (!event)
1109 return -ENOMEM;
1110
1111 err = process(tool, (union perf_event *) event, NULL, machine);
1112
1113 free(event);
1114 return err;
1115 }
1116
1117 int perf_event__synthesize_stat_config(struct perf_tool *tool,
1118 struct perf_stat_config *config,
1119 perf_event__handler_t process,
1120 struct machine *machine)
1121 {
1122 struct stat_config_event *event;
1123 int size, i = 0, err;
1124
1125 size = sizeof(*event);
1126 size += (PERF_STAT_CONFIG_TERM__MAX * sizeof(event->data[0]));
1127
1128 event = zalloc(size);
1129 if (!event)
1130 return -ENOMEM;
1131
1132 event->header.type = PERF_RECORD_STAT_CONFIG;
1133 event->header.size = size;
1134 event->nr = PERF_STAT_CONFIG_TERM__MAX;
1135
1136 #define ADD(__term, __val) \
1137 event->data[i].tag = PERF_STAT_CONFIG_TERM__##__term; \
1138 event->data[i].val = __val; \
1139 i++;
1140
1141 ADD(AGGR_MODE, config->aggr_mode)
1142 ADD(INTERVAL, config->interval)
1143 ADD(SCALE, config->scale)
1144
1145 WARN_ONCE(i != PERF_STAT_CONFIG_TERM__MAX,
1146 "stat config terms unbalanced\n");
1147 #undef ADD
1148
1149 err = process(tool, (union perf_event *) event, NULL, machine);
1150
1151 free(event);
1152 return err;
1153 }
1154
1155 int perf_event__synthesize_stat(struct perf_tool *tool,
1156 u32 cpu, u32 thread, u64 id,
1157 struct perf_counts_values *count,
1158 perf_event__handler_t process,
1159 struct machine *machine)
1160 {
1161 struct stat_event event;
1162
1163 event.header.type = PERF_RECORD_STAT;
1164 event.header.size = sizeof(event);
1165 event.header.misc = 0;
1166
1167 event.id = id;
1168 event.cpu = cpu;
1169 event.thread = thread;
1170 event.val = count->val;
1171 event.ena = count->ena;
1172 event.run = count->run;
1173
1174 return process(tool, (union perf_event *) &event, NULL, machine);
1175 }
1176
1177 int perf_event__synthesize_stat_round(struct perf_tool *tool,
1178 u64 evtime, u64 type,
1179 perf_event__handler_t process,
1180 struct machine *machine)
1181 {
1182 struct stat_round_event event;
1183
1184 event.header.type = PERF_RECORD_STAT_ROUND;
1185 event.header.size = sizeof(event);
1186 event.header.misc = 0;
1187
1188 event.time = evtime;
1189 event.type = type;
1190
1191 return process(tool, (union perf_event *) &event, NULL, machine);
1192 }
1193
1194 void perf_event__read_stat_config(struct perf_stat_config *config,
1195 struct stat_config_event *event)
1196 {
1197 unsigned i;
1198
1199 for (i = 0; i < event->nr; i++) {
1200
1201 switch (event->data[i].tag) {
1202 #define CASE(__term, __val) \
1203 case PERF_STAT_CONFIG_TERM__##__term: \
1204 config->__val = event->data[i].val; \
1205 break;
1206
1207 CASE(AGGR_MODE, aggr_mode)
1208 CASE(SCALE, scale)
1209 CASE(INTERVAL, interval)
1210 #undef CASE
1211 default:
1212 pr_warning("unknown stat config term %" PRIu64 "\n",
1213 event->data[i].tag);
1214 }
1215 }
1216 }
1217
1218 size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
1219 {
1220 const char *s;
1221
1222 if (event->header.misc & PERF_RECORD_MISC_COMM_EXEC)
1223 s = " exec";
1224 else
1225 s = "";
1226
1227 return fprintf(fp, "%s: %s:%d/%d\n", s, event->comm.comm, event->comm.pid, event->comm.tid);
1228 }
1229
1230 size_t perf_event__fprintf_namespaces(union perf_event *event, FILE *fp)
1231 {
1232 size_t ret = 0;
1233 struct perf_ns_link_info *ns_link_info;
1234 u32 nr_namespaces, idx;
1235
1236 ns_link_info = event->namespaces.link_info;
1237 nr_namespaces = event->namespaces.nr_namespaces;
1238
1239 ret += fprintf(fp, " %d/%d - nr_namespaces: %u\n\t\t[",
1240 event->namespaces.pid,
1241 event->namespaces.tid,
1242 nr_namespaces);
1243
1244 for (idx = 0; idx < nr_namespaces; idx++) {
1245 if (idx && (idx % 4 == 0))
1246 ret += fprintf(fp, "\n\t\t ");
1247
1248 ret += fprintf(fp, "%u/%s: %" PRIu64 "/%#" PRIx64 "%s", idx,
1249 perf_ns__name(idx), (u64)ns_link_info[idx].dev,
1250 (u64)ns_link_info[idx].ino,
1251 ((idx + 1) != nr_namespaces) ? ", " : "]\n");
1252 }
1253
1254 return ret;
1255 }
1256
1257 int perf_event__process_comm(struct perf_tool *tool __maybe_unused,
1258 union perf_event *event,
1259 struct perf_sample *sample,
1260 struct machine *machine)
1261 {
1262 return machine__process_comm_event(machine, event, sample);
1263 }
1264
1265 int perf_event__process_namespaces(struct perf_tool *tool __maybe_unused,
1266 union perf_event *event,
1267 struct perf_sample *sample,
1268 struct machine *machine)
1269 {
1270 return machine__process_namespaces_event(machine, event, sample);
1271 }
1272
1273 int perf_event__process_lost(struct perf_tool *tool __maybe_unused,
1274 union perf_event *event,
1275 struct perf_sample *sample,
1276 struct machine *machine)
1277 {
1278 return machine__process_lost_event(machine, event, sample);
1279 }
1280
1281 int perf_event__process_aux(struct perf_tool *tool __maybe_unused,
1282 union perf_event *event,
1283 struct perf_sample *sample __maybe_unused,
1284 struct machine *machine)
1285 {
1286 return machine__process_aux_event(machine, event);
1287 }
1288
1289 int perf_event__process_itrace_start(struct perf_tool *tool __maybe_unused,
1290 union perf_event *event,
1291 struct perf_sample *sample __maybe_unused,
1292 struct machine *machine)
1293 {
1294 return machine__process_itrace_start_event(machine, event);
1295 }
1296
1297 int perf_event__process_lost_samples(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_samples_event(machine, event, sample);
1303 }
1304
1305 int perf_event__process_switch(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_switch_event(machine, event);
1311 }
1312
1313 size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
1314 {
1315 return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %c %s\n",
1316 event->mmap.pid, event->mmap.tid, event->mmap.start,
1317 event->mmap.len, event->mmap.pgoff,
1318 (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x',
1319 event->mmap.filename);
1320 }
1321
1322 size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp)
1323 {
1324 return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64
1325 " %02x:%02x %"PRIu64" %"PRIu64"]: %c%c%c%c %s\n",
1326 event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
1327 event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj,
1328 event->mmap2.min, event->mmap2.ino,
1329 event->mmap2.ino_generation,
1330 (event->mmap2.prot & PROT_READ) ? 'r' : '-',
1331 (event->mmap2.prot & PROT_WRITE) ? 'w' : '-',
1332 (event->mmap2.prot & PROT_EXEC) ? 'x' : '-',
1333 (event->mmap2.flags & MAP_SHARED) ? 's' : 'p',
1334 event->mmap2.filename);
1335 }
1336
1337 size_t perf_event__fprintf_thread_map(union perf_event *event, FILE *fp)
1338 {
1339 struct thread_map *threads = thread_map__new_event(&event->thread_map);
1340 size_t ret;
1341
1342 ret = fprintf(fp, " nr: ");
1343
1344 if (threads)
1345 ret += thread_map__fprintf(threads, fp);
1346 else
1347 ret += fprintf(fp, "failed to get threads from event\n");
1348
1349 thread_map__put(threads);
1350 return ret;
1351 }
1352
1353 size_t perf_event__fprintf_cpu_map(union perf_event *event, FILE *fp)
1354 {
1355 struct cpu_map *cpus = cpu_map__new_data(&event->cpu_map.data);
1356 size_t ret;
1357
1358 ret = fprintf(fp, ": ");
1359
1360 if (cpus)
1361 ret += cpu_map__fprintf(cpus, fp);
1362 else
1363 ret += fprintf(fp, "failed to get cpumap from event\n");
1364
1365 cpu_map__put(cpus);
1366 return ret;
1367 }
1368
1369 int perf_event__process_mmap(struct perf_tool *tool __maybe_unused,
1370 union perf_event *event,
1371 struct perf_sample *sample,
1372 struct machine *machine)
1373 {
1374 return machine__process_mmap_event(machine, event, sample);
1375 }
1376
1377 int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused,
1378 union perf_event *event,
1379 struct perf_sample *sample,
1380 struct machine *machine)
1381 {
1382 return machine__process_mmap2_event(machine, event, sample);
1383 }
1384
1385 size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
1386 {
1387 return fprintf(fp, "(%d:%d):(%d:%d)\n",
1388 event->fork.pid, event->fork.tid,
1389 event->fork.ppid, event->fork.ptid);
1390 }
1391
1392 int perf_event__process_fork(struct perf_tool *tool __maybe_unused,
1393 union perf_event *event,
1394 struct perf_sample *sample,
1395 struct machine *machine)
1396 {
1397 return machine__process_fork_event(machine, event, sample);
1398 }
1399
1400 int perf_event__process_exit(struct perf_tool *tool __maybe_unused,
1401 union perf_event *event,
1402 struct perf_sample *sample,
1403 struct machine *machine)
1404 {
1405 return machine__process_exit_event(machine, event, sample);
1406 }
1407
1408 size_t perf_event__fprintf_aux(union perf_event *event, FILE *fp)
1409 {
1410 return fprintf(fp, " offset: %#"PRIx64" size: %#"PRIx64" flags: %#"PRIx64" [%s%s%s]\n",
1411 event->aux.aux_offset, event->aux.aux_size,
1412 event->aux.flags,
1413 event->aux.flags & PERF_AUX_FLAG_TRUNCATED ? "T" : "",
1414 event->aux.flags & PERF_AUX_FLAG_OVERWRITE ? "O" : "",
1415 event->aux.flags & PERF_AUX_FLAG_PARTIAL ? "P" : "");
1416 }
1417
1418 size_t perf_event__fprintf_itrace_start(union perf_event *event, FILE *fp)
1419 {
1420 return fprintf(fp, " pid: %u tid: %u\n",
1421 event->itrace_start.pid, event->itrace_start.tid);
1422 }
1423
1424 size_t perf_event__fprintf_switch(union perf_event *event, FILE *fp)
1425 {
1426 bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT;
1427 const char *in_out = out ? "OUT" : "IN ";
1428
1429 if (event->header.type == PERF_RECORD_SWITCH)
1430 return fprintf(fp, " %s\n", in_out);
1431
1432 return fprintf(fp, " %s %s pid/tid: %5u/%-5u\n",
1433 in_out, out ? "next" : "prev",
1434 event->context_switch.next_prev_pid,
1435 event->context_switch.next_prev_tid);
1436 }
1437
1438 static size_t perf_event__fprintf_lost(union perf_event *event, FILE *fp)
1439 {
1440 return fprintf(fp, " lost %" PRIu64 "\n", event->lost.lost);
1441 }
1442
1443 size_t perf_event__fprintf(union perf_event *event, FILE *fp)
1444 {
1445 size_t ret = fprintf(fp, "PERF_RECORD_%s",
1446 perf_event__name(event->header.type));
1447
1448 switch (event->header.type) {
1449 case PERF_RECORD_COMM:
1450 ret += perf_event__fprintf_comm(event, fp);
1451 break;
1452 case PERF_RECORD_FORK:
1453 case PERF_RECORD_EXIT:
1454 ret += perf_event__fprintf_task(event, fp);
1455 break;
1456 case PERF_RECORD_MMAP:
1457 ret += perf_event__fprintf_mmap(event, fp);
1458 break;
1459 case PERF_RECORD_NAMESPACES:
1460 ret += perf_event__fprintf_namespaces(event, fp);
1461 break;
1462 case PERF_RECORD_MMAP2:
1463 ret += perf_event__fprintf_mmap2(event, fp);
1464 break;
1465 case PERF_RECORD_AUX:
1466 ret += perf_event__fprintf_aux(event, fp);
1467 break;
1468 case PERF_RECORD_ITRACE_START:
1469 ret += perf_event__fprintf_itrace_start(event, fp);
1470 break;
1471 case PERF_RECORD_SWITCH:
1472 case PERF_RECORD_SWITCH_CPU_WIDE:
1473 ret += perf_event__fprintf_switch(event, fp);
1474 break;
1475 case PERF_RECORD_LOST:
1476 ret += perf_event__fprintf_lost(event, fp);
1477 break;
1478 default:
1479 ret += fprintf(fp, "\n");
1480 }
1481
1482 return ret;
1483 }
1484
1485 int perf_event__process(struct perf_tool *tool __maybe_unused,
1486 union perf_event *event,
1487 struct perf_sample *sample,
1488 struct machine *machine)
1489 {
1490 return machine__process_event(machine, event, sample);
1491 }
1492
1493 void thread__find_addr_map(struct thread *thread, u8 cpumode,
1494 enum map_type type, u64 addr,
1495 struct addr_location *al)
1496 {
1497 struct map_groups *mg = thread->mg;
1498 struct machine *machine = mg->machine;
1499 bool load_map = false;
1500
1501 al->machine = machine;
1502 al->thread = thread;
1503 al->addr = addr;
1504 al->cpumode = cpumode;
1505 al->filtered = 0;
1506
1507 if (machine == NULL) {
1508 al->map = NULL;
1509 return;
1510 }
1511
1512 if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
1513 al->level = 'k';
1514 mg = &machine->kmaps;
1515 load_map = true;
1516 } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
1517 al->level = '.';
1518 } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
1519 al->level = 'g';
1520 mg = &machine->kmaps;
1521 load_map = true;
1522 } else if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) {
1523 al->level = 'u';
1524 } else {
1525 al->level = 'H';
1526 al->map = NULL;
1527
1528 if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
1529 cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
1530 !perf_guest)
1531 al->filtered |= (1 << HIST_FILTER__GUEST);
1532 if ((cpumode == PERF_RECORD_MISC_USER ||
1533 cpumode == PERF_RECORD_MISC_KERNEL) &&
1534 !perf_host)
1535 al->filtered |= (1 << HIST_FILTER__HOST);
1536
1537 return;
1538 }
1539 try_again:
1540 al->map = map_groups__find(mg, type, al->addr);
1541 if (al->map == NULL) {
1542 /*
1543 * If this is outside of all known maps, and is a negative
1544 * address, try to look it up in the kernel dso, as it might be
1545 * a vsyscall or vdso (which executes in user-mode).
1546 *
1547 * XXX This is nasty, we should have a symbol list in the
1548 * "[vdso]" dso, but for now lets use the old trick of looking
1549 * in the whole kernel symbol list.
1550 */
1551 if (cpumode == PERF_RECORD_MISC_USER && machine &&
1552 mg != &machine->kmaps &&
1553 machine__kernel_ip(machine, al->addr)) {
1554 mg = &machine->kmaps;
1555 load_map = true;
1556 goto try_again;
1557 }
1558 } else {
1559 /*
1560 * Kernel maps might be changed when loading symbols so loading
1561 * must be done prior to using kernel maps.
1562 */
1563 if (load_map)
1564 map__load(al->map);
1565 al->addr = al->map->map_ip(al->map, al->addr);
1566 }
1567 }
1568
1569 void thread__find_addr_location(struct thread *thread,
1570 u8 cpumode, enum map_type type, u64 addr,
1571 struct addr_location *al)
1572 {
1573 thread__find_addr_map(thread, cpumode, type, addr, al);
1574 if (al->map != NULL)
1575 al->sym = map__find_symbol(al->map, al->addr);
1576 else
1577 al->sym = NULL;
1578 }
1579
1580 /*
1581 * Callers need to drop the reference to al->thread, obtained in
1582 * machine__findnew_thread()
1583 */
1584 int machine__resolve(struct machine *machine, struct addr_location *al,
1585 struct perf_sample *sample)
1586 {
1587 struct thread *thread = machine__findnew_thread(machine, sample->pid,
1588 sample->tid);
1589
1590 if (thread == NULL)
1591 return -1;
1592
1593 dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
1594 /*
1595 * Have we already created the kernel maps for this machine?
1596 *
1597 * This should have happened earlier, when we processed the kernel MMAP
1598 * events, but for older perf.data files there was no such thing, so do
1599 * it now.
1600 */
1601 if (sample->cpumode == PERF_RECORD_MISC_KERNEL &&
1602 machine__kernel_map(machine) == NULL)
1603 machine__create_kernel_maps(machine);
1604
1605 thread__find_addr_map(thread, sample->cpumode, MAP__FUNCTION, sample->ip, al);
1606 dump_printf(" ...... dso: %s\n",
1607 al->map ? al->map->dso->long_name :
1608 al->level == 'H' ? "[hypervisor]" : "<not found>");
1609
1610 if (thread__is_filtered(thread))
1611 al->filtered |= (1 << HIST_FILTER__THREAD);
1612
1613 al->sym = NULL;
1614 al->cpu = sample->cpu;
1615 al->socket = -1;
1616 al->srcline = NULL;
1617
1618 if (al->cpu >= 0) {
1619 struct perf_env *env = machine->env;
1620
1621 if (env && env->cpu)
1622 al->socket = env->cpu[al->cpu].socket_id;
1623 }
1624
1625 if (al->map) {
1626 struct dso *dso = al->map->dso;
1627
1628 if (symbol_conf.dso_list &&
1629 (!dso || !(strlist__has_entry(symbol_conf.dso_list,
1630 dso->short_name) ||
1631 (dso->short_name != dso->long_name &&
1632 strlist__has_entry(symbol_conf.dso_list,
1633 dso->long_name))))) {
1634 al->filtered |= (1 << HIST_FILTER__DSO);
1635 }
1636
1637 al->sym = map__find_symbol(al->map, al->addr);
1638 }
1639
1640 if (symbol_conf.sym_list &&
1641 (!al->sym || !strlist__has_entry(symbol_conf.sym_list,
1642 al->sym->name))) {
1643 al->filtered |= (1 << HIST_FILTER__SYMBOL);
1644 }
1645
1646 return 0;
1647 }
1648
1649 /*
1650 * The preprocess_sample method will return with reference counts for the
1651 * in it, when done using (and perhaps getting ref counts if needing to
1652 * keep a pointer to one of those entries) it must be paired with
1653 * addr_location__put(), so that the refcounts can be decremented.
1654 */
1655 void addr_location__put(struct addr_location *al)
1656 {
1657 thread__zput(al->thread);
1658 }
1659
1660 bool is_bts_event(struct perf_event_attr *attr)
1661 {
1662 return attr->type == PERF_TYPE_HARDWARE &&
1663 (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) &&
1664 attr->sample_period == 1;
1665 }
1666
1667 bool sample_addr_correlates_sym(struct perf_event_attr *attr)
1668 {
1669 if (attr->type == PERF_TYPE_SOFTWARE &&
1670 (attr->config == PERF_COUNT_SW_PAGE_FAULTS ||
1671 attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
1672 attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ))
1673 return true;
1674
1675 if (is_bts_event(attr))
1676 return true;
1677
1678 return false;
1679 }
1680
1681 void thread__resolve(struct thread *thread, struct addr_location *al,
1682 struct perf_sample *sample)
1683 {
1684 thread__find_addr_map(thread, sample->cpumode, MAP__FUNCTION, sample->addr, al);
1685 if (!al->map)
1686 thread__find_addr_map(thread, sample->cpumode, MAP__VARIABLE,
1687 sample->addr, al);
1688
1689 al->cpu = sample->cpu;
1690 al->sym = NULL;
1691
1692 if (al->map)
1693 al->sym = map__find_symbol(al->map, al->addr);
1694 }
CRIS linux kernel tree