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