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perf tools: Use fallback for sample_addr_correlates_sym() cases
[linux/fpc-iii.git] / tools / perf / util / event.c
blob24493200cf8044c830258ab8c619ca310f243e91
1 // SPDX-License-Identifier: GPL-2.0
2 #include <dirent.h>
3 #include <errno.h>
4 #include <fcntl.h>
5 #include <inttypes.h>
6 #include <linux/kernel.h>
7 #include <linux/types.h>
8 #include <sys/types.h>
9 #include <sys/stat.h>
10 #include <unistd.h>
11 #include <uapi/linux/mman.h> /* To get things like MAP_HUGETLB even on older libc headers */
12 #include <api/fs/fs.h>
13 #include <linux/perf_event.h>
14 #include "event.h"
15 #include "debug.h"
16 #include "hist.h"
17 #include "machine.h"
18 #include "sort.h"
19 #include "string2.h"
20 #include "strlist.h"
21 #include "thread.h"
22 #include "thread_map.h"
23 #include "sane_ctype.h"
24 #include "symbol/kallsyms.h"
25 #include "asm/bug.h"
26 #include "stat.h"
27
28 static const char *perf_event__names[] = {
29 [0] = "TOTAL",
30 [PERF_RECORD_MMAP] = "MMAP",
31 [PERF_RECORD_MMAP2] = "MMAP2",
32 [PERF_RECORD_LOST] = "LOST",
33 [PERF_RECORD_COMM] = "COMM",
34 [PERF_RECORD_EXIT] = "EXIT",
35 [PERF_RECORD_THROTTLE] = "THROTTLE",
36 [PERF_RECORD_UNTHROTTLE] = "UNTHROTTLE",
37 [PERF_RECORD_FORK] = "FORK",
38 [PERF_RECORD_READ] = "READ",
39 [PERF_RECORD_SAMPLE] = "SAMPLE",
40 [PERF_RECORD_AUX] = "AUX",
41 [PERF_RECORD_ITRACE_START] = "ITRACE_START",
42 [PERF_RECORD_LOST_SAMPLES] = "LOST_SAMPLES",
43 [PERF_RECORD_SWITCH] = "SWITCH",
44 [PERF_RECORD_SWITCH_CPU_WIDE] = "SWITCH_CPU_WIDE",
45 [PERF_RECORD_NAMESPACES] = "NAMESPACES",
46 [PERF_RECORD_HEADER_ATTR] = "ATTR",
47 [PERF_RECORD_HEADER_EVENT_TYPE] = "EVENT_TYPE",
48 [PERF_RECORD_HEADER_TRACING_DATA] = "TRACING_DATA",
49 [PERF_RECORD_HEADER_BUILD_ID] = "BUILD_ID",
50 [PERF_RECORD_FINISHED_ROUND] = "FINISHED_ROUND",
51 [PERF_RECORD_ID_INDEX] = "ID_INDEX",
52 [PERF_RECORD_AUXTRACE_INFO] = "AUXTRACE_INFO",
53 [PERF_RECORD_AUXTRACE] = "AUXTRACE",
54 [PERF_RECORD_AUXTRACE_ERROR] = "AUXTRACE_ERROR",
55 [PERF_RECORD_THREAD_MAP] = "THREAD_MAP",
56 [PERF_RECORD_CPU_MAP] = "CPU_MAP",
57 [PERF_RECORD_STAT_CONFIG] = "STAT_CONFIG",
58 [PERF_RECORD_STAT] = "STAT",
59 [PERF_RECORD_STAT_ROUND] = "STAT_ROUND",
60 [PERF_RECORD_EVENT_UPDATE] = "EVENT_UPDATE",
61 [PERF_RECORD_TIME_CONV] = "TIME_CONV",
62 [PERF_RECORD_HEADER_FEATURE] = "FEATURE",
63 };
64
65 static const char *perf_ns__names[] = {
66 [NET_NS_INDEX] = "net",
67 [UTS_NS_INDEX] = "uts",
68 [IPC_NS_INDEX] = "ipc",
69 [PID_NS_INDEX] = "pid",
70 [USER_NS_INDEX] = "user",
71 [MNT_NS_INDEX] = "mnt",
72 [CGROUP_NS_INDEX] = "cgroup",
73 };
74
75 const char *perf_event__name(unsigned int id)
76 {
77 if (id >= ARRAY_SIZE(perf_event__names))
78 return "INVALID";
79 if (!perf_event__names[id])
80 return "UNKNOWN";
81 return perf_event__names[id];
82 }
83
84 static const char *perf_ns__name(unsigned int id)
85 {
86 if (id >= ARRAY_SIZE(perf_ns__names))
87 return "UNKNOWN";
88 return perf_ns__names[id];
89 }
90
91 int perf_tool__process_synth_event(struct perf_tool *tool,
92 union perf_event *event,
93 struct machine *machine,
94 perf_event__handler_t process)
95 {
96 struct perf_sample synth_sample = {
97 .pid = -1,
98 .tid = -1,
99 .time = -1,
100 .stream_id = -1,
101 .cpu = -1,
102 .period = 1,
103 .cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK,
104 };
105
106 return process(tool, event, &synth_sample, machine);
107 };
108
109 /*
110 * Assumes that the first 4095 bytes of /proc/pid/stat contains
111 * the comm, tgid and ppid.
112 */
113 static int perf_event__get_comm_ids(pid_t pid, char *comm, size_t len,
114 pid_t *tgid, pid_t *ppid)
115 {
116 char filename[PATH_MAX];
117 char bf[4096];
118 int fd;
119 size_t size = 0;
120 ssize_t n;
121 char *name, *tgids, *ppids;
122
123 *tgid = -1;
124 *ppid = -1;
125
126 snprintf(filename, sizeof(filename), "/proc/%d/status", pid);
127
128 fd = open(filename, O_RDONLY);
129 if (fd < 0) {
130 pr_debug("couldn't open %s\n", filename);
131 return -1;
132 }
133
134 n = read(fd, bf, sizeof(bf) - 1);
135 close(fd);
136 if (n <= 0) {
137 pr_warning("Couldn't get COMM, tigd and ppid for pid %d\n",
138 pid);
139 return -1;
140 }
141 bf[n] = '\0';
142
143 name = strstr(bf, "Name:");
144 tgids = strstr(bf, "Tgid:");
145 ppids = strstr(bf, "PPid:");
146
147 if (name) {
148 char *nl;
149
150 name += 5; /* strlen("Name:") */
151 name = ltrim(name);
152
153 nl = strchr(name, '\n');
154 if (nl)
155 *nl = '\0';
156
157 size = strlen(name);
158 if (size >= len)
159 size = len - 1;
160 memcpy(comm, name, size);
161 comm[size] = '\0';
162 } else {
163 pr_debug("Name: string not found for pid %d\n", pid);
164 }
165
166 if (tgids) {
167 tgids += 5; /* strlen("Tgid:") */
168 *tgid = atoi(tgids);
169 } else {
170 pr_debug("Tgid: string not found for pid %d\n", pid);
171 }
172
173 if (ppids) {
174 ppids += 5; /* strlen("PPid:") */
175 *ppid = atoi(ppids);
176 } else {
177 pr_debug("PPid: string not found for pid %d\n", pid);
178 }
179
180 return 0;
181 }
182
183 static int perf_event__prepare_comm(union perf_event *event, pid_t pid,
184 struct machine *machine,
185 pid_t *tgid, pid_t *ppid)
186 {
187 size_t size;
188
189 *ppid = -1;
190
191 memset(&event->comm, 0, sizeof(event->comm));
192
193 if (machine__is_host(machine)) {
194 if (perf_event__get_comm_ids(pid, event->comm.comm,
195 sizeof(event->comm.comm),
196 tgid, ppid) != 0) {
197 return -1;
198 }
199 } else {
200 *tgid = machine->pid;
201 }
202
203 if (*tgid < 0)
204 return -1;
205
206 event->comm.pid = *tgid;
207 event->comm.header.type = PERF_RECORD_COMM;
208
209 size = strlen(event->comm.comm) + 1;
210 size = PERF_ALIGN(size, sizeof(u64));
211 memset(event->comm.comm + size, 0, machine->id_hdr_size);
212 event->comm.header.size = (sizeof(event->comm) -
213 (sizeof(event->comm.comm) - size) +
214 machine->id_hdr_size);
215 event->comm.tid = pid;
216
217 return 0;
218 }
219
220 pid_t perf_event__synthesize_comm(struct perf_tool *tool,
221 union perf_event *event, pid_t pid,
222 perf_event__handler_t process,
223 struct machine *machine)
224 {
225 pid_t tgid, ppid;
226
227 if (perf_event__prepare_comm(event, pid, machine, &tgid, &ppid) != 0)
228 return -1;
229
230 if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
231 return -1;
232
233 return tgid;
234 }
235
236 static void perf_event__get_ns_link_info(pid_t pid, const char *ns,
237 struct perf_ns_link_info *ns_link_info)
238 {
239 struct stat64 st;
240 char proc_ns[128];
241
242 sprintf(proc_ns, "/proc/%u/ns/%s", pid, ns);
243 if (stat64(proc_ns, &st) == 0) {
244 ns_link_info->dev = st.st_dev;
245 ns_link_info->ino = st.st_ino;
246 }
247 }
248
249 int perf_event__synthesize_namespaces(struct perf_tool *tool,
250 union perf_event *event,
251 pid_t pid, pid_t tgid,
252 perf_event__handler_t process,
253 struct machine *machine)
254 {
255 u32 idx;
256 struct perf_ns_link_info *ns_link_info;
257
258 if (!tool || !tool->namespace_events)
259 return 0;
260
261 memset(&event->namespaces, 0, (sizeof(event->namespaces) +
262 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
263 machine->id_hdr_size));
264
265 event->namespaces.pid = tgid;
266 event->namespaces.tid = pid;
267
268 event->namespaces.nr_namespaces = NR_NAMESPACES;
269
270 ns_link_info = event->namespaces.link_info;
271
272 for (idx = 0; idx < event->namespaces.nr_namespaces; idx++)
273 perf_event__get_ns_link_info(pid, perf_ns__name(idx),
274 &ns_link_info[idx]);
275
276 event->namespaces.header.type = PERF_RECORD_NAMESPACES;
277
278 event->namespaces.header.size = (sizeof(event->namespaces) +
279 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
280 machine->id_hdr_size);
281
282 if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
283 return -1;
284
285 return 0;
286 }
287
288 static int perf_event__synthesize_fork(struct perf_tool *tool,
289 union perf_event *event,
290 pid_t pid, pid_t tgid, pid_t ppid,
291 perf_event__handler_t process,
292 struct machine *machine)
293 {
294 memset(&event->fork, 0, sizeof(event->fork) + machine->id_hdr_size);
295
296 /*
297 * for main thread set parent to ppid from status file. For other
298 * threads set parent pid to main thread. ie., assume main thread
299 * spawns all threads in a process
300 */
301 if (tgid == pid) {
302 event->fork.ppid = ppid;
303 event->fork.ptid = ppid;
304 } else {
305 event->fork.ppid = tgid;
306 event->fork.ptid = tgid;
307 }
308 event->fork.pid = tgid;
309 event->fork.tid = pid;
310 event->fork.header.type = PERF_RECORD_FORK;
311 event->fork.header.misc = PERF_RECORD_MISC_FORK_EXEC;
312
313 event->fork.header.size = (sizeof(event->fork) + machine->id_hdr_size);
314
315 if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
316 return -1;
317
318 return 0;
319 }
320
321 int perf_event__synthesize_mmap_events(struct perf_tool *tool,
322 union perf_event *event,
323 pid_t pid, pid_t tgid,
324 perf_event__handler_t process,
325 struct machine *machine,
326 bool mmap_data,
327 unsigned int proc_map_timeout)
328 {
329 char filename[PATH_MAX];
330 FILE *fp;
331 unsigned long long t;
332 bool truncation = false;
333 unsigned long long timeout = proc_map_timeout * 1000000ULL;
334 int rc = 0;
335 const char *hugetlbfs_mnt = hugetlbfs__mountpoint();
336 int hugetlbfs_mnt_len = hugetlbfs_mnt ? strlen(hugetlbfs_mnt) : 0;
337
338 if (machine__is_default_guest(machine))
339 return 0;
340
341 snprintf(filename, sizeof(filename), "%s/proc/%d/task/%d/maps",
342 machine->root_dir, pid, pid);
343
344 fp = fopen(filename, "r");
345 if (fp == NULL) {
346 /*
347 * We raced with a task exiting - just return:
348 */
349 pr_debug("couldn't open %s\n", filename);
350 return -1;
351 }
352
353 event->header.type = PERF_RECORD_MMAP2;
354 t = rdclock();
355
356 while (1) {
357 char bf[BUFSIZ];
358 char prot[5];
359 char execname[PATH_MAX];
360 char anonstr[] = "//anon";
361 unsigned int ino;
362 size_t size;
363 ssize_t n;
364
365 if (fgets(bf, sizeof(bf), fp) == NULL)
366 break;
367
368 if ((rdclock() - t) > timeout) {
369 pr_warning("Reading %s time out. "
370 "You may want to increase "
371 "the time limit by --proc-map-timeout\n",
372 filename);
373 truncation = true;
374 goto out;
375 }
376
377 /* ensure null termination since stack will be reused. */
378 strcpy(execname, "");
379
380 /* 00400000-0040c000 r-xp 00000000 fd:01 41038 /bin/cat */
381 n = sscanf(bf, "%"PRIx64"-%"PRIx64" %s %"PRIx64" %x:%x %u %[^\n]\n",
382 &event->mmap2.start, &event->mmap2.len, prot,
383 &event->mmap2.pgoff, &event->mmap2.maj,
384 &event->mmap2.min,
385 &ino, execname);
386
387 /*
388 * Anon maps don't have the execname.
389 */
390 if (n < 7)
391 continue;
392
393 event->mmap2.ino = (u64)ino;
394
395 /*
396 * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
397 */
398 if (machine__is_host(machine))
399 event->header.misc = PERF_RECORD_MISC_USER;
400 else
401 event->header.misc = PERF_RECORD_MISC_GUEST_USER;
402
403 /* map protection and flags bits */
404 event->mmap2.prot = 0;
405 event->mmap2.flags = 0;
406 if (prot[0] == 'r')
407 event->mmap2.prot |= PROT_READ;
408 if (prot[1] == 'w')
409 event->mmap2.prot |= PROT_WRITE;
410 if (prot[2] == 'x')
411 event->mmap2.prot |= PROT_EXEC;
412
413 if (prot[3] == 's')
414 event->mmap2.flags |= MAP_SHARED;
415 else
416 event->mmap2.flags |= MAP_PRIVATE;
417
418 if (prot[2] != 'x') {
419 if (!mmap_data || prot[0] != 'r')
420 continue;
421
422 event->header.misc |= PERF_RECORD_MISC_MMAP_DATA;
423 }
424
425 out:
426 if (truncation)
427 event->header.misc |= PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT;
428
429 if (!strcmp(execname, ""))
430 strcpy(execname, anonstr);
431
432 if (hugetlbfs_mnt_len &&
433 !strncmp(execname, hugetlbfs_mnt, hugetlbfs_mnt_len)) {
434 strcpy(execname, anonstr);
435 event->mmap2.flags |= MAP_HUGETLB;
436 }
437
438 size = strlen(execname) + 1;
439 memcpy(event->mmap2.filename, execname, size);
440 size = PERF_ALIGN(size, sizeof(u64));
441 event->mmap2.len -= event->mmap.start;
442 event->mmap2.header.size = (sizeof(event->mmap2) -
443 (sizeof(event->mmap2.filename) - size));
444 memset(event->mmap2.filename + size, 0, machine->id_hdr_size);
445 event->mmap2.header.size += machine->id_hdr_size;
446 event->mmap2.pid = tgid;
447 event->mmap2.tid = pid;
448
449 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
450 rc = -1;
451 break;
452 }
453
454 if (truncation)
455 break;
456 }
457
458 fclose(fp);
459 return rc;
460 }
461
462 int perf_event__synthesize_modules(struct perf_tool *tool,
463 perf_event__handler_t process,
464 struct machine *machine)
465 {
466 int rc = 0;
467 struct map *pos;
468 struct maps *maps = machine__kernel_maps(machine);
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_kmodule(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 * send mmap only for thread group leader
547 * see thread__init_map_groups
548 */
549 if (pid == tgid &&
550 perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
551 process, machine, mmap_data,
552 proc_map_timeout))
553 return -1;
554
555 return 0;
556 }
557
558 if (machine__is_default_guest(machine))
559 return 0;
560
561 snprintf(filename, sizeof(filename), "%s/proc/%d/task",
562 machine->root_dir, pid);
563
564 tasks = opendir(filename);
565 if (tasks == NULL) {
566 pr_debug("couldn't open %s\n", filename);
567 return 0;
568 }
569
570 while ((dirent = readdir(tasks)) != NULL) {
571 char *end;
572 pid_t _pid;
573
574 _pid = strtol(dirent->d_name, &end, 10);
575 if (*end)
576 continue;
577
578 rc = -1;
579 if (perf_event__prepare_comm(comm_event, _pid, machine,
580 &tgid, &ppid) != 0)
581 break;
582
583 if (perf_event__synthesize_fork(tool, fork_event, _pid, tgid,
584 ppid, process, machine) < 0)
585 break;
586
587 if (perf_event__synthesize_namespaces(tool, namespaces_event, _pid,
588 tgid, process, machine) < 0)
589 break;
590
591 /*
592 * Send the prepared comm event
593 */
594 if (perf_tool__process_synth_event(tool, comm_event, machine, process) != 0)
595 break;
596
597 rc = 0;
598 if (_pid == pid) {
599 /* process the parent's maps too */
600 rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
601 process, machine, mmap_data, proc_map_timeout);
602 if (rc)
603 break;
604 }
605 }
606
607 closedir(tasks);
608 return rc;
609 }
610
611 int perf_event__synthesize_thread_map(struct perf_tool *tool,
612 struct thread_map *threads,
613 perf_event__handler_t process,
614 struct machine *machine,
615 bool mmap_data,
616 unsigned int proc_map_timeout)
617 {
618 union perf_event *comm_event, *mmap_event, *fork_event;
619 union perf_event *namespaces_event;
620 int err = -1, thread, j;
621
622 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
623 if (comm_event == NULL)
624 goto out;
625
626 mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
627 if (mmap_event == NULL)
628 goto out_free_comm;
629
630 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
631 if (fork_event == NULL)
632 goto out_free_mmap;
633
634 namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
635 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
636 machine->id_hdr_size);
637 if (namespaces_event == NULL)
638 goto out_free_fork;
639
640 err = 0;
641 for (thread = 0; thread < threads->nr; ++thread) {
642 if (__event__synthesize_thread(comm_event, mmap_event,
643 fork_event, namespaces_event,
644 thread_map__pid(threads, thread), 0,
645 process, tool, machine,
646 mmap_data, proc_map_timeout)) {
647 err = -1;
648 break;
649 }
650
651 /*
652 * comm.pid is set to thread group id by
653 * perf_event__synthesize_comm
654 */
655 if ((int) comm_event->comm.pid != thread_map__pid(threads, thread)) {
656 bool need_leader = true;
657
658 /* is thread group leader in thread_map? */
659 for (j = 0; j < threads->nr; ++j) {
660 if ((int) comm_event->comm.pid == thread_map__pid(threads, j)) {
661 need_leader = false;
662 break;
663 }
664 }
665
666 /* if not, generate events for it */
667 if (need_leader &&
668 __event__synthesize_thread(comm_event, mmap_event,
669 fork_event, namespaces_event,
670 comm_event->comm.pid, 0,
671 process, tool, machine,
672 mmap_data, proc_map_timeout)) {
673 err = -1;
674 break;
675 }
676 }
677 }
678 free(namespaces_event);
679 out_free_fork:
680 free(fork_event);
681 out_free_mmap:
682 free(mmap_event);
683 out_free_comm:
684 free(comm_event);
685 out:
686 return err;
687 }
688
689 static int __perf_event__synthesize_threads(struct perf_tool *tool,
690 perf_event__handler_t process,
691 struct machine *machine,
692 bool mmap_data,
693 unsigned int proc_map_timeout,
694 struct dirent **dirent,
695 int start,
696 int num)
697 {
698 union perf_event *comm_event, *mmap_event, *fork_event;
699 union perf_event *namespaces_event;
700 int err = -1;
701 char *end;
702 pid_t pid;
703 int i;
704
705 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
706 if (comm_event == NULL)
707 goto out;
708
709 mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
710 if (mmap_event == NULL)
711 goto out_free_comm;
712
713 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
714 if (fork_event == NULL)
715 goto out_free_mmap;
716
717 namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
718 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
719 machine->id_hdr_size);
720 if (namespaces_event == NULL)
721 goto out_free_fork;
722
723 for (i = start; i < start + num; i++) {
724 if (!isdigit(dirent[i]->d_name[0]))
725 continue;
726
727 pid = (pid_t)strtol(dirent[i]->d_name, &end, 10);
728 /* only interested in proper numerical dirents */
729 if (*end)
730 continue;
731 /*
732 * We may race with exiting thread, so don't stop just because
733 * one thread couldn't be synthesized.
734 */
735 __event__synthesize_thread(comm_event, mmap_event, fork_event,
736 namespaces_event, pid, 1, process,
737 tool, machine, mmap_data,
738 proc_map_timeout);
739 }
740 err = 0;
741
742 free(namespaces_event);
743 out_free_fork:
744 free(fork_event);
745 out_free_mmap:
746 free(mmap_event);
747 out_free_comm:
748 free(comm_event);
749 out:
750 return err;
751 }
752
753 struct synthesize_threads_arg {
754 struct perf_tool *tool;
755 perf_event__handler_t process;
756 struct machine *machine;
757 bool mmap_data;
758 unsigned int proc_map_timeout;
759 struct dirent **dirent;
760 int num;
761 int start;
762 };
763
764 static void *synthesize_threads_worker(void *arg)
765 {
766 struct synthesize_threads_arg *args = arg;
767
768 __perf_event__synthesize_threads(args->tool, args->process,
769 args->machine, args->mmap_data,
770 args->proc_map_timeout, args->dirent,
771 args->start, args->num);
772 return NULL;
773 }
774
775 int perf_event__synthesize_threads(struct perf_tool *tool,
776 perf_event__handler_t process,
777 struct machine *machine,
778 bool mmap_data,
779 unsigned int proc_map_timeout,
780 unsigned int nr_threads_synthesize)
781 {
782 struct synthesize_threads_arg *args = NULL;
783 pthread_t *synthesize_threads = NULL;
784 char proc_path[PATH_MAX];
785 struct dirent **dirent;
786 int num_per_thread;
787 int m, n, i, j;
788 int thread_nr;
789 int base = 0;
790 int err = -1;
791
792
793 if (machine__is_default_guest(machine))
794 return 0;
795
796 snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir);
797 n = scandir(proc_path, &dirent, 0, alphasort);
798 if (n < 0)
799 return err;
800
801 if (nr_threads_synthesize == UINT_MAX)
802 thread_nr = sysconf(_SC_NPROCESSORS_ONLN);
803 else
804 thread_nr = nr_threads_synthesize;
805
806 if (thread_nr <= 1) {
807 err = __perf_event__synthesize_threads(tool, process,
808 machine, mmap_data,
809 proc_map_timeout,
810 dirent, base, n);
811 goto free_dirent;
812 }
813 if (thread_nr > n)
814 thread_nr = n;
815
816 synthesize_threads = calloc(sizeof(pthread_t), thread_nr);
817 if (synthesize_threads == NULL)
818 goto free_dirent;
819
820 args = calloc(sizeof(*args), thread_nr);
821 if (args == NULL)
822 goto free_threads;
823
824 num_per_thread = n / thread_nr;
825 m = n % thread_nr;
826 for (i = 0; i < thread_nr; i++) {
827 args[i].tool = tool;
828 args[i].process = process;
829 args[i].machine = machine;
830 args[i].mmap_data = mmap_data;
831 args[i].proc_map_timeout = proc_map_timeout;
832 args[i].dirent = dirent;
833 }
834 for (i = 0; i < m; i++) {
835 args[i].num = num_per_thread + 1;
836 args[i].start = i * args[i].num;
837 }
838 if (i != 0)
839 base = args[i-1].start + args[i-1].num;
840 for (j = i; j < thread_nr; j++) {
841 args[j].num = num_per_thread;
842 args[j].start = base + (j - i) * args[i].num;
843 }
844
845 for (i = 0; i < thread_nr; i++) {
846 if (pthread_create(&synthesize_threads[i], NULL,
847 synthesize_threads_worker, &args[i]))
848 goto out_join;
849 }
850 err = 0;
851 out_join:
852 for (i = 0; i < thread_nr; i++)
853 pthread_join(synthesize_threads[i], NULL);
854 free(args);
855 free_threads:
856 free(synthesize_threads);
857 free_dirent:
858 for (i = 0; i < n; i++)
859 free(dirent[i]);
860 free(dirent);
861
862 return err;
863 }
864
865 struct process_symbol_args {
866 const char *name;
867 u64 start;
868 };
869
870 static int find_symbol_cb(void *arg, const char *name, char type,
871 u64 start)
872 {
873 struct process_symbol_args *args = arg;
874
875 /*
876 * Must be a function or at least an alias, as in PARISC64, where "_text" is
877 * an 'A' to the same address as "_stext".
878 */
879 if (!(kallsyms__is_function(type) ||
880 type == 'A') || strcmp(name, args->name))
881 return 0;
882
883 args->start = start;
884 return 1;
885 }
886
887 int kallsyms__get_function_start(const char *kallsyms_filename,
888 const char *symbol_name, u64 *addr)
889 {
890 struct process_symbol_args args = { .name = symbol_name, };
891
892 if (kallsyms__parse(kallsyms_filename, &args, find_symbol_cb) <= 0)
893 return -1;
894
895 *addr = args.start;
896 return 0;
897 }
898
899 int __weak perf_event__synthesize_extra_kmaps(struct perf_tool *tool __maybe_unused,
900 perf_event__handler_t process __maybe_unused,
901 struct machine *machine __maybe_unused)
902 {
903 return 0;
904 }
905
906 static int __perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
907 perf_event__handler_t process,
908 struct machine *machine)
909 {
910 size_t size;
911 struct map *map = machine__kernel_map(machine);
912 struct kmap *kmap;
913 int err;
914 union perf_event *event;
915
916 if (symbol_conf.kptr_restrict)
917 return -1;
918 if (map == NULL)
919 return -1;
920
921 /*
922 * We should get this from /sys/kernel/sections/.text, but till that is
923 * available use this, and after it is use this as a fallback for older
924 * kernels.
925 */
926 event = zalloc((sizeof(event->mmap) + machine->id_hdr_size));
927 if (event == NULL) {
928 pr_debug("Not enough memory synthesizing mmap event "
929 "for kernel modules\n");
930 return -1;
931 }
932
933 if (machine__is_host(machine)) {
934 /*
935 * kernel uses PERF_RECORD_MISC_USER for user space maps,
936 * see kernel/perf_event.c __perf_event_mmap
937 */
938 event->header.misc = PERF_RECORD_MISC_KERNEL;
939 } else {
940 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
941 }
942
943 kmap = map__kmap(map);
944 size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
945 "%s%s", machine->mmap_name, kmap->ref_reloc_sym->name) + 1;
946 size = PERF_ALIGN(size, sizeof(u64));
947 event->mmap.header.type = PERF_RECORD_MMAP;
948 event->mmap.header.size = (sizeof(event->mmap) -
949 (sizeof(event->mmap.filename) - size) + machine->id_hdr_size);
950 event->mmap.pgoff = kmap->ref_reloc_sym->addr;
951 event->mmap.start = map->start;
952 event->mmap.len = map->end - event->mmap.start;
953 event->mmap.pid = machine->pid;
954
955 err = perf_tool__process_synth_event(tool, event, machine, process);
956 free(event);
957
958 return err;
959 }
960
961 int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
962 perf_event__handler_t process,
963 struct machine *machine)
964 {
965 int err;
966
967 err = __perf_event__synthesize_kernel_mmap(tool, process, machine);
968 if (err < 0)
969 return err;
970
971 return perf_event__synthesize_extra_kmaps(tool, process, machine);
972 }
973
974 int perf_event__synthesize_thread_map2(struct perf_tool *tool,
975 struct thread_map *threads,
976 perf_event__handler_t process,
977 struct machine *machine)
978 {
979 union perf_event *event;
980 int i, err, size;
981
982 size = sizeof(event->thread_map);
983 size += threads->nr * sizeof(event->thread_map.entries[0]);
984
985 event = zalloc(size);
986 if (!event)
987 return -ENOMEM;
988
989 event->header.type = PERF_RECORD_THREAD_MAP;
990 event->header.size = size;
991 event->thread_map.nr = threads->nr;
992
993 for (i = 0; i < threads->nr; i++) {
994 struct thread_map_event_entry *entry = &event->thread_map.entries[i];
995 char *comm = thread_map__comm(threads, i);
996
997 if (!comm)
998 comm = (char *) "";
999
1000 entry->pid = thread_map__pid(threads, i);
1001 strncpy((char *) &entry->comm, comm, sizeof(entry->comm));
1002 }
1003
1004 err = process(tool, event, NULL, machine);
1005
1006 free(event);
1007 return err;
1008 }
1009
1010 static void synthesize_cpus(struct cpu_map_entries *cpus,
1011 struct cpu_map *map)
1012 {
1013 int i;
1014
1015 cpus->nr = map->nr;
1016
1017 for (i = 0; i < map->nr; i++)
1018 cpus->cpu[i] = map->map[i];
1019 }
1020
1021 static void synthesize_mask(struct cpu_map_mask *mask,
1022 struct cpu_map *map, int max)
1023 {
1024 int i;
1025
1026 mask->nr = BITS_TO_LONGS(max);
1027 mask->long_size = sizeof(long);
1028
1029 for (i = 0; i < map->nr; i++)
1030 set_bit(map->map[i], mask->mask);
1031 }
1032
1033 static size_t cpus_size(struct cpu_map *map)
1034 {
1035 return sizeof(struct cpu_map_entries) + map->nr * sizeof(u16);
1036 }
1037
1038 static size_t mask_size(struct cpu_map *map, int *max)
1039 {
1040 int i;
1041
1042 *max = 0;
1043
1044 for (i = 0; i < map->nr; i++) {
1045 /* bit possition of the cpu is + 1 */
1046 int bit = map->map[i] + 1;
1047
1048 if (bit > *max)
1049 *max = bit;
1050 }
1051
1052 return sizeof(struct cpu_map_mask) + BITS_TO_LONGS(*max) * sizeof(long);
1053 }
1054
1055 void *cpu_map_data__alloc(struct cpu_map *map, size_t *size, u16 *type, int *max)
1056 {
1057 size_t size_cpus, size_mask;
1058 bool is_dummy = cpu_map__empty(map);
1059
1060 /*
1061 * Both array and mask data have variable size based
1062 * on the number of cpus and their actual values.
1063 * The size of the 'struct cpu_map_data' is:
1064 *
1065 * array = size of 'struct cpu_map_entries' +
1066 * number of cpus * sizeof(u64)
1067 *
1068 * mask = size of 'struct cpu_map_mask' +
1069 * maximum cpu bit converted to size of longs
1070 *
1071 * and finaly + the size of 'struct cpu_map_data'.
1072 */
1073 size_cpus = cpus_size(map);
1074 size_mask = mask_size(map, max);
1075
1076 if (is_dummy || (size_cpus < size_mask)) {
1077 *size += size_cpus;
1078 *type = PERF_CPU_MAP__CPUS;
1079 } else {
1080 *size += size_mask;
1081 *type = PERF_CPU_MAP__MASK;
1082 }
1083
1084 *size += sizeof(struct cpu_map_data);
1085 *size = PERF_ALIGN(*size, sizeof(u64));
1086 return zalloc(*size);
1087 }
1088
1089 void cpu_map_data__synthesize(struct cpu_map_data *data, struct cpu_map *map,
1090 u16 type, int max)
1091 {
1092 data->type = type;
1093
1094 switch (type) {
1095 case PERF_CPU_MAP__CPUS:
1096 synthesize_cpus((struct cpu_map_entries *) data->data, map);
1097 break;
1098 case PERF_CPU_MAP__MASK:
1099 synthesize_mask((struct cpu_map_mask *) data->data, map, max);
1100 default:
1101 break;
1102 };
1103 }
1104
1105 static struct cpu_map_event* cpu_map_event__new(struct cpu_map *map)
1106 {
1107 size_t size = sizeof(struct cpu_map_event);
1108 struct cpu_map_event *event;
1109 int max;
1110 u16 type;
1111
1112 event = cpu_map_data__alloc(map, &size, &type, &max);
1113 if (!event)
1114 return NULL;
1115
1116 event->header.type = PERF_RECORD_CPU_MAP;
1117 event->header.size = size;
1118 event->data.type = type;
1119
1120 cpu_map_data__synthesize(&event->data, map, type, max);
1121 return event;
1122 }
1123
1124 int perf_event__synthesize_cpu_map(struct perf_tool *tool,
1125 struct cpu_map *map,
1126 perf_event__handler_t process,
1127 struct machine *machine)
1128 {
1129 struct cpu_map_event *event;
1130 int err;
1131
1132 event = cpu_map_event__new(map);
1133 if (!event)
1134 return -ENOMEM;
1135
1136 err = process(tool, (union perf_event *) event, NULL, machine);
1137
1138 free(event);
1139 return err;
1140 }
1141
1142 int perf_event__synthesize_stat_config(struct perf_tool *tool,
1143 struct perf_stat_config *config,
1144 perf_event__handler_t process,
1145 struct machine *machine)
1146 {
1147 struct stat_config_event *event;
1148 int size, i = 0, err;
1149
1150 size = sizeof(*event);
1151 size += (PERF_STAT_CONFIG_TERM__MAX * sizeof(event->data[0]));
1152
1153 event = zalloc(size);
1154 if (!event)
1155 return -ENOMEM;
1156
1157 event->header.type = PERF_RECORD_STAT_CONFIG;
1158 event->header.size = size;
1159 event->nr = PERF_STAT_CONFIG_TERM__MAX;
1160
1161 #define ADD(__term, __val) \
1162 event->data[i].tag = PERF_STAT_CONFIG_TERM__##__term; \
1163 event->data[i].val = __val; \
1164 i++;
1165
1166 ADD(AGGR_MODE, config->aggr_mode)
1167 ADD(INTERVAL, config->interval)
1168 ADD(SCALE, config->scale)
1169
1170 WARN_ONCE(i != PERF_STAT_CONFIG_TERM__MAX,
1171 "stat config terms unbalanced\n");
1172 #undef ADD
1173
1174 err = process(tool, (union perf_event *) event, NULL, machine);
1175
1176 free(event);
1177 return err;
1178 }
1179
1180 int perf_event__synthesize_stat(struct perf_tool *tool,
1181 u32 cpu, u32 thread, u64 id,
1182 struct perf_counts_values *count,
1183 perf_event__handler_t process,
1184 struct machine *machine)
1185 {
1186 struct stat_event event;
1187
1188 event.header.type = PERF_RECORD_STAT;
1189 event.header.size = sizeof(event);
1190 event.header.misc = 0;
1191
1192 event.id = id;
1193 event.cpu = cpu;
1194 event.thread = thread;
1195 event.val = count->val;
1196 event.ena = count->ena;
1197 event.run = count->run;
1198
1199 return process(tool, (union perf_event *) &event, NULL, machine);
1200 }
1201
1202 int perf_event__synthesize_stat_round(struct perf_tool *tool,
1203 u64 evtime, u64 type,
1204 perf_event__handler_t process,
1205 struct machine *machine)
1206 {
1207 struct stat_round_event event;
1208
1209 event.header.type = PERF_RECORD_STAT_ROUND;
1210 event.header.size = sizeof(event);
1211 event.header.misc = 0;
1212
1213 event.time = evtime;
1214 event.type = type;
1215
1216 return process(tool, (union perf_event *) &event, NULL, machine);
1217 }
1218
1219 void perf_event__read_stat_config(struct perf_stat_config *config,
1220 struct stat_config_event *event)
1221 {
1222 unsigned i;
1223
1224 for (i = 0; i < event->nr; i++) {
1225
1226 switch (event->data[i].tag) {
1227 #define CASE(__term, __val) \
1228 case PERF_STAT_CONFIG_TERM__##__term: \
1229 config->__val = event->data[i].val; \
1230 break;
1231
1232 CASE(AGGR_MODE, aggr_mode)
1233 CASE(SCALE, scale)
1234 CASE(INTERVAL, interval)
1235 #undef CASE
1236 default:
1237 pr_warning("unknown stat config term %" PRIu64 "\n",
1238 event->data[i].tag);
1239 }
1240 }
1241 }
1242
1243 size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
1244 {
1245 const char *s;
1246
1247 if (event->header.misc & PERF_RECORD_MISC_COMM_EXEC)
1248 s = " exec";
1249 else
1250 s = "";
1251
1252 return fprintf(fp, "%s: %s:%d/%d\n", s, event->comm.comm, event->comm.pid, event->comm.tid);
1253 }
1254
1255 size_t perf_event__fprintf_namespaces(union perf_event *event, FILE *fp)
1256 {
1257 size_t ret = 0;
1258 struct perf_ns_link_info *ns_link_info;
1259 u32 nr_namespaces, idx;
1260
1261 ns_link_info = event->namespaces.link_info;
1262 nr_namespaces = event->namespaces.nr_namespaces;
1263
1264 ret += fprintf(fp, " %d/%d - nr_namespaces: %u\n\t\t[",
1265 event->namespaces.pid,
1266 event->namespaces.tid,
1267 nr_namespaces);
1268
1269 for (idx = 0; idx < nr_namespaces; idx++) {
1270 if (idx && (idx % 4 == 0))
1271 ret += fprintf(fp, "\n\t\t ");
1272
1273 ret += fprintf(fp, "%u/%s: %" PRIu64 "/%#" PRIx64 "%s", idx,
1274 perf_ns__name(idx), (u64)ns_link_info[idx].dev,
1275 (u64)ns_link_info[idx].ino,
1276 ((idx + 1) != nr_namespaces) ? ", " : "]\n");
1277 }
1278
1279 return ret;
1280 }
1281
1282 int perf_event__process_comm(struct perf_tool *tool __maybe_unused,
1283 union perf_event *event,
1284 struct perf_sample *sample,
1285 struct machine *machine)
1286 {
1287 return machine__process_comm_event(machine, event, sample);
1288 }
1289
1290 int perf_event__process_namespaces(struct perf_tool *tool __maybe_unused,
1291 union perf_event *event,
1292 struct perf_sample *sample,
1293 struct machine *machine)
1294 {
1295 return machine__process_namespaces_event(machine, event, sample);
1296 }
1297
1298 int perf_event__process_lost(struct perf_tool *tool __maybe_unused,
1299 union perf_event *event,
1300 struct perf_sample *sample,
1301 struct machine *machine)
1302 {
1303 return machine__process_lost_event(machine, event, sample);
1304 }
1305
1306 int perf_event__process_aux(struct perf_tool *tool __maybe_unused,
1307 union perf_event *event,
1308 struct perf_sample *sample __maybe_unused,
1309 struct machine *machine)
1310 {
1311 return machine__process_aux_event(machine, event);
1312 }
1313
1314 int perf_event__process_itrace_start(struct perf_tool *tool __maybe_unused,
1315 union perf_event *event,
1316 struct perf_sample *sample __maybe_unused,
1317 struct machine *machine)
1318 {
1319 return machine__process_itrace_start_event(machine, event);
1320 }
1321
1322 int perf_event__process_lost_samples(struct perf_tool *tool __maybe_unused,
1323 union perf_event *event,
1324 struct perf_sample *sample,
1325 struct machine *machine)
1326 {
1327 return machine__process_lost_samples_event(machine, event, sample);
1328 }
1329
1330 int perf_event__process_switch(struct perf_tool *tool __maybe_unused,
1331 union perf_event *event,
1332 struct perf_sample *sample __maybe_unused,
1333 struct machine *machine)
1334 {
1335 return machine__process_switch_event(machine, event);
1336 }
1337
1338 size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
1339 {
1340 return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %c %s\n",
1341 event->mmap.pid, event->mmap.tid, event->mmap.start,
1342 event->mmap.len, event->mmap.pgoff,
1343 (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x',
1344 event->mmap.filename);
1345 }
1346
1347 size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp)
1348 {
1349 return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64
1350 " %02x:%02x %"PRIu64" %"PRIu64"]: %c%c%c%c %s\n",
1351 event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
1352 event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj,
1353 event->mmap2.min, event->mmap2.ino,
1354 event->mmap2.ino_generation,
1355 (event->mmap2.prot & PROT_READ) ? 'r' : '-',
1356 (event->mmap2.prot & PROT_WRITE) ? 'w' : '-',
1357 (event->mmap2.prot & PROT_EXEC) ? 'x' : '-',
1358 (event->mmap2.flags & MAP_SHARED) ? 's' : 'p',
1359 event->mmap2.filename);
1360 }
1361
1362 size_t perf_event__fprintf_thread_map(union perf_event *event, FILE *fp)
1363 {
1364 struct thread_map *threads = thread_map__new_event(&event->thread_map);
1365 size_t ret;
1366
1367 ret = fprintf(fp, " nr: ");
1368
1369 if (threads)
1370 ret += thread_map__fprintf(threads, fp);
1371 else
1372 ret += fprintf(fp, "failed to get threads from event\n");
1373
1374 thread_map__put(threads);
1375 return ret;
1376 }
1377
1378 size_t perf_event__fprintf_cpu_map(union perf_event *event, FILE *fp)
1379 {
1380 struct cpu_map *cpus = cpu_map__new_data(&event->cpu_map.data);
1381 size_t ret;
1382
1383 ret = fprintf(fp, ": ");
1384
1385 if (cpus)
1386 ret += cpu_map__fprintf(cpus, fp);
1387 else
1388 ret += fprintf(fp, "failed to get cpumap from event\n");
1389
1390 cpu_map__put(cpus);
1391 return ret;
1392 }
1393
1394 int perf_event__process_mmap(struct perf_tool *tool __maybe_unused,
1395 union perf_event *event,
1396 struct perf_sample *sample,
1397 struct machine *machine)
1398 {
1399 return machine__process_mmap_event(machine, event, sample);
1400 }
1401
1402 int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused,
1403 union perf_event *event,
1404 struct perf_sample *sample,
1405 struct machine *machine)
1406 {
1407 return machine__process_mmap2_event(machine, event, sample);
1408 }
1409
1410 size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
1411 {
1412 return fprintf(fp, "(%d:%d):(%d:%d)\n",
1413 event->fork.pid, event->fork.tid,
1414 event->fork.ppid, event->fork.ptid);
1415 }
1416
1417 int perf_event__process_fork(struct perf_tool *tool __maybe_unused,
1418 union perf_event *event,
1419 struct perf_sample *sample,
1420 struct machine *machine)
1421 {
1422 return machine__process_fork_event(machine, event, sample);
1423 }
1424
1425 int perf_event__process_exit(struct perf_tool *tool __maybe_unused,
1426 union perf_event *event,
1427 struct perf_sample *sample,
1428 struct machine *machine)
1429 {
1430 return machine__process_exit_event(machine, event, sample);
1431 }
1432
1433 size_t perf_event__fprintf_aux(union perf_event *event, FILE *fp)
1434 {
1435 return fprintf(fp, " offset: %#"PRIx64" size: %#"PRIx64" flags: %#"PRIx64" [%s%s%s]\n",
1436 event->aux.aux_offset, event->aux.aux_size,
1437 event->aux.flags,
1438 event->aux.flags & PERF_AUX_FLAG_TRUNCATED ? "T" : "",
1439 event->aux.flags & PERF_AUX_FLAG_OVERWRITE ? "O" : "",
1440 event->aux.flags & PERF_AUX_FLAG_PARTIAL ? "P" : "");
1441 }
1442
1443 size_t perf_event__fprintf_itrace_start(union perf_event *event, FILE *fp)
1444 {
1445 return fprintf(fp, " pid: %u tid: %u\n",
1446 event->itrace_start.pid, event->itrace_start.tid);
1447 }
1448
1449 size_t perf_event__fprintf_switch(union perf_event *event, FILE *fp)
1450 {
1451 bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT;
1452 const char *in_out = !out ? "IN " :
1453 !(event->header.misc & PERF_RECORD_MISC_SWITCH_OUT_PREEMPT) ?
1454 "OUT " : "OUT preempt";
1455
1456 if (event->header.type == PERF_RECORD_SWITCH)
1457 return fprintf(fp, " %s\n", in_out);
1458
1459 return fprintf(fp, " %s %s pid/tid: %5u/%-5u\n",
1460 in_out, out ? "next" : "prev",
1461 event->context_switch.next_prev_pid,
1462 event->context_switch.next_prev_tid);
1463 }
1464
1465 static size_t perf_event__fprintf_lost(union perf_event *event, FILE *fp)
1466 {
1467 return fprintf(fp, " lost %" PRIu64 "\n", event->lost.lost);
1468 }
1469
1470 size_t perf_event__fprintf(union perf_event *event, FILE *fp)
1471 {
1472 size_t ret = fprintf(fp, "PERF_RECORD_%s",
1473 perf_event__name(event->header.type));
1474
1475 switch (event->header.type) {
1476 case PERF_RECORD_COMM:
1477 ret += perf_event__fprintf_comm(event, fp);
1478 break;
1479 case PERF_RECORD_FORK:
1480 case PERF_RECORD_EXIT:
1481 ret += perf_event__fprintf_task(event, fp);
1482 break;
1483 case PERF_RECORD_MMAP:
1484 ret += perf_event__fprintf_mmap(event, fp);
1485 break;
1486 case PERF_RECORD_NAMESPACES:
1487 ret += perf_event__fprintf_namespaces(event, fp);
1488 break;
1489 case PERF_RECORD_MMAP2:
1490 ret += perf_event__fprintf_mmap2(event, fp);
1491 break;
1492 case PERF_RECORD_AUX:
1493 ret += perf_event__fprintf_aux(event, fp);
1494 break;
1495 case PERF_RECORD_ITRACE_START:
1496 ret += perf_event__fprintf_itrace_start(event, fp);
1497 break;
1498 case PERF_RECORD_SWITCH:
1499 case PERF_RECORD_SWITCH_CPU_WIDE:
1500 ret += perf_event__fprintf_switch(event, fp);
1501 break;
1502 case PERF_RECORD_LOST:
1503 ret += perf_event__fprintf_lost(event, fp);
1504 break;
1505 default:
1506 ret += fprintf(fp, "\n");
1507 }
1508
1509 return ret;
1510 }
1511
1512 int perf_event__process(struct perf_tool *tool __maybe_unused,
1513 union perf_event *event,
1514 struct perf_sample *sample,
1515 struct machine *machine)
1516 {
1517 return machine__process_event(machine, event, sample);
1518 }
1519
1520 struct map *thread__find_map(struct thread *thread, u8 cpumode, u64 addr,
1521 struct addr_location *al)
1522 {
1523 struct map_groups *mg = thread->mg;
1524 struct machine *machine = mg->machine;
1525 bool load_map = false;
1526
1527 al->machine = machine;
1528 al->thread = thread;
1529 al->addr = addr;
1530 al->cpumode = cpumode;
1531 al->filtered = 0;
1532
1533 if (machine == NULL) {
1534 al->map = NULL;
1535 return NULL;
1536 }
1537
1538 if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
1539 al->level = 'k';
1540 mg = &machine->kmaps;
1541 load_map = true;
1542 } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
1543 al->level = '.';
1544 } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
1545 al->level = 'g';
1546 mg = &machine->kmaps;
1547 load_map = true;
1548 } else if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) {
1549 al->level = 'u';
1550 } else {
1551 al->level = 'H';
1552 al->map = NULL;
1553
1554 if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
1555 cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
1556 !perf_guest)
1557 al->filtered |= (1 << HIST_FILTER__GUEST);
1558 if ((cpumode == PERF_RECORD_MISC_USER ||
1559 cpumode == PERF_RECORD_MISC_KERNEL) &&
1560 !perf_host)
1561 al->filtered |= (1 << HIST_FILTER__HOST);
1562
1563 return NULL;
1564 }
1565
1566 al->map = map_groups__find(mg, al->addr);
1567 if (al->map != NULL) {
1568 /*
1569 * Kernel maps might be changed when loading symbols so loading
1570 * must be done prior to using kernel maps.
1571 */
1572 if (load_map)
1573 map__load(al->map);
1574 al->addr = al->map->map_ip(al->map, al->addr);
1575 }
1576
1577 return al->map;
1578 }
1579
1580 /*
1581 * For branch stacks or branch samples, the sample cpumode might not be correct
1582 * because it applies only to the sample 'ip' and not necessary to 'addr' or
1583 * branch stack addresses. If possible, use a fallback to deal with those cases.
1584 */
1585 struct map *thread__find_map_fb(struct thread *thread, u8 cpumode, u64 addr,
1586 struct addr_location *al)
1587 {
1588 struct map *map = thread__find_map(thread, cpumode, addr, al);
1589 struct machine *machine = thread->mg->machine;
1590 u8 addr_cpumode = machine__addr_cpumode(machine, cpumode, addr);
1591
1592 if (map || addr_cpumode == cpumode)
1593 return map;
1594
1595 return thread__find_map(thread, addr_cpumode, addr, al);
1596 }
1597
1598 struct symbol *thread__find_symbol(struct thread *thread, u8 cpumode,
1599 u64 addr, struct addr_location *al)
1600 {
1601 al->sym = NULL;
1602 if (thread__find_map(thread, cpumode, addr, al))
1603 al->sym = map__find_symbol(al->map, al->addr);
1604 return al->sym;
1605 }
1606
1607 struct symbol *thread__find_symbol_fb(struct thread *thread, u8 cpumode,
1608 u64 addr, struct addr_location *al)
1609 {
1610 al->sym = NULL;
1611 if (thread__find_map_fb(thread, cpumode, addr, al))
1612 al->sym = map__find_symbol(al->map, al->addr);
1613 return al->sym;
1614 }
1615
1616 /*
1617 * Callers need to drop the reference to al->thread, obtained in
1618 * machine__findnew_thread()
1619 */
1620 int machine__resolve(struct machine *machine, struct addr_location *al,
1621 struct perf_sample *sample)
1622 {
1623 struct thread *thread = machine__findnew_thread(machine, sample->pid,
1624 sample->tid);
1625
1626 if (thread == NULL)
1627 return -1;
1628
1629 dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
1630 thread__find_map(thread, sample->cpumode, sample->ip, al);
1631 dump_printf(" ...... dso: %s\n",
1632 al->map ? al->map->dso->long_name :
1633 al->level == 'H' ? "[hypervisor]" : "<not found>");
1634
1635 if (thread__is_filtered(thread))
1636 al->filtered |= (1 << HIST_FILTER__THREAD);
1637
1638 al->sym = NULL;
1639 al->cpu = sample->cpu;
1640 al->socket = -1;
1641 al->srcline = NULL;
1642
1643 if (al->cpu >= 0) {
1644 struct perf_env *env = machine->env;
1645
1646 if (env && env->cpu)
1647 al->socket = env->cpu[al->cpu].socket_id;
1648 }
1649
1650 if (al->map) {
1651 struct dso *dso = al->map->dso;
1652
1653 if (symbol_conf.dso_list &&
1654 (!dso || !(strlist__has_entry(symbol_conf.dso_list,
1655 dso->short_name) ||
1656 (dso->short_name != dso->long_name &&
1657 strlist__has_entry(symbol_conf.dso_list,
1658 dso->long_name))))) {
1659 al->filtered |= (1 << HIST_FILTER__DSO);
1660 }
1661
1662 al->sym = map__find_symbol(al->map, al->addr);
1663 }
1664
1665 if (symbol_conf.sym_list &&
1666 (!al->sym || !strlist__has_entry(symbol_conf.sym_list,
1667 al->sym->name))) {
1668 al->filtered |= (1 << HIST_FILTER__SYMBOL);
1669 }
1670
1671 return 0;
1672 }
1673
1674 /*
1675 * The preprocess_sample method will return with reference counts for the
1676 * in it, when done using (and perhaps getting ref counts if needing to
1677 * keep a pointer to one of those entries) it must be paired with
1678 * addr_location__put(), so that the refcounts can be decremented.
1679 */
1680 void addr_location__put(struct addr_location *al)
1681 {
1682 thread__zput(al->thread);
1683 }
1684
1685 bool is_bts_event(struct perf_event_attr *attr)
1686 {
1687 return attr->type == PERF_TYPE_HARDWARE &&
1688 (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) &&
1689 attr->sample_period == 1;
1690 }
1691
1692 bool sample_addr_correlates_sym(struct perf_event_attr *attr)
1693 {
1694 if (attr->type == PERF_TYPE_SOFTWARE &&
1695 (attr->config == PERF_COUNT_SW_PAGE_FAULTS ||
1696 attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
1697 attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ))
1698 return true;
1699
1700 if (is_bts_event(attr))
1701 return true;
1702
1703 return false;
1704 }
1705
1706 void thread__resolve(struct thread *thread, struct addr_location *al,
1707 struct perf_sample *sample)
1708 {
1709 thread__find_map_fb(thread, sample->cpumode, sample->addr, al);
1710
1711 al->cpu = sample->cpu;
1712 al->sym = NULL;
1713
1714 if (al->map)
1715 al->sym = map__find_symbol(al->map, al->addr);
1716 }
Linux with added FPC-III support