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