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