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Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/ide
[mirror_ubuntu-artful-kernel.git] / tools / perf / util / event.c
1 #include <linux/types.h>
2 #include <linux/mman.h> /* To get things like MAP_HUGETLB even on older libc headers */
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 const char *hugetlbfs_mnt = hugetlbfs__mountpoint();
253 int hugetlbfs_mnt_len = hugetlbfs_mnt ? strlen(hugetlbfs_mnt) : 0;
254
255 if (machine__is_default_guest(machine))
256 return 0;
257
258 snprintf(filename, sizeof(filename), "%s/proc/%d/maps",
259 machine->root_dir, pid);
260
261 fp = fopen(filename, "r");
262 if (fp == NULL) {
263 /*
264 * We raced with a task exiting - just return:
265 */
266 pr_debug("couldn't open %s\n", filename);
267 return -1;
268 }
269
270 event->header.type = PERF_RECORD_MMAP2;
271 t = rdclock();
272
273 while (1) {
274 char bf[BUFSIZ];
275 char prot[5];
276 char execname[PATH_MAX];
277 char anonstr[] = "//anon";
278 unsigned int ino;
279 size_t size;
280 ssize_t n;
281
282 if (fgets(bf, sizeof(bf), fp) == NULL)
283 break;
284
285 if ((rdclock() - t) > timeout) {
286 pr_warning("Reading %s time out. "
287 "You may want to increase "
288 "the time limit by --proc-map-timeout\n",
289 filename);
290 truncation = true;
291 goto out;
292 }
293
294 /* ensure null termination since stack will be reused. */
295 strcpy(execname, "");
296
297 /* 00400000-0040c000 r-xp 00000000 fd:01 41038 /bin/cat */
298 n = sscanf(bf, "%"PRIx64"-%"PRIx64" %s %"PRIx64" %x:%x %u %[^\n]\n",
299 &event->mmap2.start, &event->mmap2.len, prot,
300 &event->mmap2.pgoff, &event->mmap2.maj,
301 &event->mmap2.min,
302 &ino, execname);
303
304 /*
305 * Anon maps don't have the execname.
306 */
307 if (n < 7)
308 continue;
309
310 event->mmap2.ino = (u64)ino;
311
312 /*
313 * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
314 */
315 if (machine__is_host(machine))
316 event->header.misc = PERF_RECORD_MISC_USER;
317 else
318 event->header.misc = PERF_RECORD_MISC_GUEST_USER;
319
320 /* map protection and flags bits */
321 event->mmap2.prot = 0;
322 event->mmap2.flags = 0;
323 if (prot[0] == 'r')
324 event->mmap2.prot |= PROT_READ;
325 if (prot[1] == 'w')
326 event->mmap2.prot |= PROT_WRITE;
327 if (prot[2] == 'x')
328 event->mmap2.prot |= PROT_EXEC;
329
330 if (prot[3] == 's')
331 event->mmap2.flags |= MAP_SHARED;
332 else
333 event->mmap2.flags |= MAP_PRIVATE;
334
335 if (prot[2] != 'x') {
336 if (!mmap_data || prot[0] != 'r')
337 continue;
338
339 event->header.misc |= PERF_RECORD_MISC_MMAP_DATA;
340 }
341
342 out:
343 if (truncation)
344 event->header.misc |= PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT;
345
346 if (!strcmp(execname, ""))
347 strcpy(execname, anonstr);
348
349 if (hugetlbfs_mnt_len &&
350 !strncmp(execname, hugetlbfs_mnt, hugetlbfs_mnt_len)) {
351 strcpy(execname, anonstr);
352 event->mmap2.flags |= MAP_HUGETLB;
353 }
354
355 size = strlen(execname) + 1;
356 memcpy(event->mmap2.filename, execname, size);
357 size = PERF_ALIGN(size, sizeof(u64));
358 event->mmap2.len -= event->mmap.start;
359 event->mmap2.header.size = (sizeof(event->mmap2) -
360 (sizeof(event->mmap2.filename) - size));
361 memset(event->mmap2.filename + size, 0, machine->id_hdr_size);
362 event->mmap2.header.size += machine->id_hdr_size;
363 event->mmap2.pid = tgid;
364 event->mmap2.tid = pid;
365
366 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
367 rc = -1;
368 break;
369 }
370
371 if (truncation)
372 break;
373 }
374
375 fclose(fp);
376 return rc;
377 }
378
379 int perf_event__synthesize_modules(struct perf_tool *tool,
380 perf_event__handler_t process,
381 struct machine *machine)
382 {
383 int rc = 0;
384 struct map *pos;
385 struct map_groups *kmaps = &machine->kmaps;
386 struct maps *maps = &kmaps->maps[MAP__FUNCTION];
387 union perf_event *event = zalloc((sizeof(event->mmap) +
388 machine->id_hdr_size));
389 if (event == NULL) {
390 pr_debug("Not enough memory synthesizing mmap event "
391 "for kernel modules\n");
392 return -1;
393 }
394
395 event->header.type = PERF_RECORD_MMAP;
396
397 /*
398 * kernel uses 0 for user space maps, see kernel/perf_event.c
399 * __perf_event_mmap
400 */
401 if (machine__is_host(machine))
402 event->header.misc = PERF_RECORD_MISC_KERNEL;
403 else
404 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
405
406 for (pos = maps__first(maps); pos; pos = map__next(pos)) {
407 size_t size;
408
409 if (__map__is_kernel(pos))
410 continue;
411
412 size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
413 event->mmap.header.type = PERF_RECORD_MMAP;
414 event->mmap.header.size = (sizeof(event->mmap) -
415 (sizeof(event->mmap.filename) - size));
416 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
417 event->mmap.header.size += machine->id_hdr_size;
418 event->mmap.start = pos->start;
419 event->mmap.len = pos->end - pos->start;
420 event->mmap.pid = machine->pid;
421
422 memcpy(event->mmap.filename, pos->dso->long_name,
423 pos->dso->long_name_len + 1);
424 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
425 rc = -1;
426 break;
427 }
428 }
429
430 free(event);
431 return rc;
432 }
433
434 static int __event__synthesize_thread(union perf_event *comm_event,
435 union perf_event *mmap_event,
436 union perf_event *fork_event,
437 pid_t pid, int full,
438 perf_event__handler_t process,
439 struct perf_tool *tool,
440 struct machine *machine,
441 bool mmap_data,
442 unsigned int proc_map_timeout)
443 {
444 char filename[PATH_MAX];
445 DIR *tasks;
446 struct dirent *dirent;
447 pid_t tgid, ppid;
448 int rc = 0;
449
450 /* special case: only send one comm event using passed in pid */
451 if (!full) {
452 tgid = perf_event__synthesize_comm(tool, comm_event, pid,
453 process, machine);
454
455 if (tgid == -1)
456 return -1;
457
458 return perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
459 process, machine, mmap_data,
460 proc_map_timeout);
461 }
462
463 if (machine__is_default_guest(machine))
464 return 0;
465
466 snprintf(filename, sizeof(filename), "%s/proc/%d/task",
467 machine->root_dir, pid);
468
469 tasks = opendir(filename);
470 if (tasks == NULL) {
471 pr_debug("couldn't open %s\n", filename);
472 return 0;
473 }
474
475 while ((dirent = readdir(tasks)) != NULL) {
476 char *end;
477 pid_t _pid;
478
479 _pid = strtol(dirent->d_name, &end, 10);
480 if (*end)
481 continue;
482
483 rc = -1;
484 if (perf_event__prepare_comm(comm_event, _pid, machine,
485 &tgid, &ppid) != 0)
486 break;
487
488 if (perf_event__synthesize_fork(tool, fork_event, _pid, tgid,
489 ppid, process, machine) < 0)
490 break;
491 /*
492 * Send the prepared comm event
493 */
494 if (perf_tool__process_synth_event(tool, comm_event, machine, process) != 0)
495 break;
496
497 rc = 0;
498 if (_pid == pid) {
499 /* process the parent's maps too */
500 rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
501 process, machine, mmap_data, proc_map_timeout);
502 if (rc)
503 break;
504 }
505 }
506
507 closedir(tasks);
508 return rc;
509 }
510
511 int perf_event__synthesize_thread_map(struct perf_tool *tool,
512 struct thread_map *threads,
513 perf_event__handler_t process,
514 struct machine *machine,
515 bool mmap_data,
516 unsigned int proc_map_timeout)
517 {
518 union perf_event *comm_event, *mmap_event, *fork_event;
519 int err = -1, thread, j;
520
521 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
522 if (comm_event == NULL)
523 goto out;
524
525 mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
526 if (mmap_event == NULL)
527 goto out_free_comm;
528
529 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
530 if (fork_event == NULL)
531 goto out_free_mmap;
532
533 err = 0;
534 for (thread = 0; thread < threads->nr; ++thread) {
535 if (__event__synthesize_thread(comm_event, mmap_event,
536 fork_event,
537 thread_map__pid(threads, thread), 0,
538 process, tool, machine,
539 mmap_data, proc_map_timeout)) {
540 err = -1;
541 break;
542 }
543
544 /*
545 * comm.pid is set to thread group id by
546 * perf_event__synthesize_comm
547 */
548 if ((int) comm_event->comm.pid != thread_map__pid(threads, thread)) {
549 bool need_leader = true;
550
551 /* is thread group leader in thread_map? */
552 for (j = 0; j < threads->nr; ++j) {
553 if ((int) comm_event->comm.pid == thread_map__pid(threads, j)) {
554 need_leader = false;
555 break;
556 }
557 }
558
559 /* if not, generate events for it */
560 if (need_leader &&
561 __event__synthesize_thread(comm_event, mmap_event,
562 fork_event,
563 comm_event->comm.pid, 0,
564 process, tool, machine,
565 mmap_data, proc_map_timeout)) {
566 err = -1;
567 break;
568 }
569 }
570 }
571 free(fork_event);
572 out_free_mmap:
573 free(mmap_event);
574 out_free_comm:
575 free(comm_event);
576 out:
577 return err;
578 }
579
580 int perf_event__synthesize_threads(struct perf_tool *tool,
581 perf_event__handler_t process,
582 struct machine *machine,
583 bool mmap_data,
584 unsigned int proc_map_timeout)
585 {
586 DIR *proc;
587 char proc_path[PATH_MAX];
588 struct dirent *dirent;
589 union perf_event *comm_event, *mmap_event, *fork_event;
590 int err = -1;
591
592 if (machine__is_default_guest(machine))
593 return 0;
594
595 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
596 if (comm_event == NULL)
597 goto out;
598
599 mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
600 if (mmap_event == NULL)
601 goto out_free_comm;
602
603 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
604 if (fork_event == NULL)
605 goto out_free_mmap;
606
607 snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir);
608 proc = opendir(proc_path);
609
610 if (proc == NULL)
611 goto out_free_fork;
612
613 while ((dirent = readdir(proc)) != NULL) {
614 char *end;
615 pid_t pid = strtol(dirent->d_name, &end, 10);
616
617 if (*end) /* only interested in proper numerical dirents */
618 continue;
619 /*
620 * We may race with exiting thread, so don't stop just because
621 * one thread couldn't be synthesized.
622 */
623 __event__synthesize_thread(comm_event, mmap_event, fork_event, pid,
624 1, process, tool, machine, mmap_data,
625 proc_map_timeout);
626 }
627
628 err = 0;
629 closedir(proc);
630 out_free_fork:
631 free(fork_event);
632 out_free_mmap:
633 free(mmap_event);
634 out_free_comm:
635 free(comm_event);
636 out:
637 return err;
638 }
639
640 struct process_symbol_args {
641 const char *name;
642 u64 start;
643 };
644
645 static int find_symbol_cb(void *arg, const char *name, char type,
646 u64 start)
647 {
648 struct process_symbol_args *args = arg;
649
650 /*
651 * Must be a function or at least an alias, as in PARISC64, where "_text" is
652 * an 'A' to the same address as "_stext".
653 */
654 if (!(symbol_type__is_a(type, MAP__FUNCTION) ||
655 type == 'A') || strcmp(name, args->name))
656 return 0;
657
658 args->start = start;
659 return 1;
660 }
661
662 u64 kallsyms__get_function_start(const char *kallsyms_filename,
663 const char *symbol_name)
664 {
665 struct process_symbol_args args = { .name = symbol_name, };
666
667 if (kallsyms__parse(kallsyms_filename, &args, find_symbol_cb) <= 0)
668 return 0;
669
670 return args.start;
671 }
672
673 int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
674 perf_event__handler_t process,
675 struct machine *machine)
676 {
677 size_t size;
678 const char *mmap_name;
679 char name_buff[PATH_MAX];
680 struct map *map = machine__kernel_map(machine);
681 struct kmap *kmap;
682 int err;
683 union perf_event *event;
684
685 if (symbol_conf.kptr_restrict)
686 return -1;
687 if (map == NULL)
688 return -1;
689
690 /*
691 * We should get this from /sys/kernel/sections/.text, but till that is
692 * available use this, and after it is use this as a fallback for older
693 * kernels.
694 */
695 event = zalloc((sizeof(event->mmap) + machine->id_hdr_size));
696 if (event == NULL) {
697 pr_debug("Not enough memory synthesizing mmap event "
698 "for kernel modules\n");
699 return -1;
700 }
701
702 mmap_name = machine__mmap_name(machine, name_buff, sizeof(name_buff));
703 if (machine__is_host(machine)) {
704 /*
705 * kernel uses PERF_RECORD_MISC_USER for user space maps,
706 * see kernel/perf_event.c __perf_event_mmap
707 */
708 event->header.misc = PERF_RECORD_MISC_KERNEL;
709 } else {
710 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
711 }
712
713 kmap = map__kmap(map);
714 size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
715 "%s%s", mmap_name, kmap->ref_reloc_sym->name) + 1;
716 size = PERF_ALIGN(size, sizeof(u64));
717 event->mmap.header.type = PERF_RECORD_MMAP;
718 event->mmap.header.size = (sizeof(event->mmap) -
719 (sizeof(event->mmap.filename) - size) + machine->id_hdr_size);
720 event->mmap.pgoff = kmap->ref_reloc_sym->addr;
721 event->mmap.start = map->start;
722 event->mmap.len = map->end - event->mmap.start;
723 event->mmap.pid = machine->pid;
724
725 err = perf_tool__process_synth_event(tool, event, machine, process);
726 free(event);
727
728 return err;
729 }
730
731 int perf_event__synthesize_thread_map2(struct perf_tool *tool,
732 struct thread_map *threads,
733 perf_event__handler_t process,
734 struct machine *machine)
735 {
736 union perf_event *event;
737 int i, err, size;
738
739 size = sizeof(event->thread_map);
740 size += threads->nr * sizeof(event->thread_map.entries[0]);
741
742 event = zalloc(size);
743 if (!event)
744 return -ENOMEM;
745
746 event->header.type = PERF_RECORD_THREAD_MAP;
747 event->header.size = size;
748 event->thread_map.nr = threads->nr;
749
750 for (i = 0; i < threads->nr; i++) {
751 struct thread_map_event_entry *entry = &event->thread_map.entries[i];
752 char *comm = thread_map__comm(threads, i);
753
754 if (!comm)
755 comm = (char *) "";
756
757 entry->pid = thread_map__pid(threads, i);
758 strncpy((char *) &entry->comm, comm, sizeof(entry->comm));
759 }
760
761 err = process(tool, event, NULL, machine);
762
763 free(event);
764 return err;
765 }
766
767 static void synthesize_cpus(struct cpu_map_entries *cpus,
768 struct cpu_map *map)
769 {
770 int i;
771
772 cpus->nr = map->nr;
773
774 for (i = 0; i < map->nr; i++)
775 cpus->cpu[i] = map->map[i];
776 }
777
778 static void synthesize_mask(struct cpu_map_mask *mask,
779 struct cpu_map *map, int max)
780 {
781 int i;
782
783 mask->nr = BITS_TO_LONGS(max);
784 mask->long_size = sizeof(long);
785
786 for (i = 0; i < map->nr; i++)
787 set_bit(map->map[i], mask->mask);
788 }
789
790 static size_t cpus_size(struct cpu_map *map)
791 {
792 return sizeof(struct cpu_map_entries) + map->nr * sizeof(u16);
793 }
794
795 static size_t mask_size(struct cpu_map *map, int *max)
796 {
797 int i;
798
799 *max = 0;
800
801 for (i = 0; i < map->nr; i++) {
802 /* bit possition of the cpu is + 1 */
803 int bit = map->map[i] + 1;
804
805 if (bit > *max)
806 *max = bit;
807 }
808
809 return sizeof(struct cpu_map_mask) + BITS_TO_LONGS(*max) * sizeof(long);
810 }
811
812 void *cpu_map_data__alloc(struct cpu_map *map, size_t *size, u16 *type, int *max)
813 {
814 size_t size_cpus, size_mask;
815 bool is_dummy = cpu_map__empty(map);
816
817 /*
818 * Both array and mask data have variable size based
819 * on the number of cpus and their actual values.
820 * The size of the 'struct cpu_map_data' is:
821 *
822 * array = size of 'struct cpu_map_entries' +
823 * number of cpus * sizeof(u64)
824 *
825 * mask = size of 'struct cpu_map_mask' +
826 * maximum cpu bit converted to size of longs
827 *
828 * and finaly + the size of 'struct cpu_map_data'.
829 */
830 size_cpus = cpus_size(map);
831 size_mask = mask_size(map, max);
832
833 if (is_dummy || (size_cpus < size_mask)) {
834 *size += size_cpus;
835 *type = PERF_CPU_MAP__CPUS;
836 } else {
837 *size += size_mask;
838 *type = PERF_CPU_MAP__MASK;
839 }
840
841 *size += sizeof(struct cpu_map_data);
842 return zalloc(*size);
843 }
844
845 void cpu_map_data__synthesize(struct cpu_map_data *data, struct cpu_map *map,
846 u16 type, int max)
847 {
848 data->type = type;
849
850 switch (type) {
851 case PERF_CPU_MAP__CPUS:
852 synthesize_cpus((struct cpu_map_entries *) data->data, map);
853 break;
854 case PERF_CPU_MAP__MASK:
855 synthesize_mask((struct cpu_map_mask *) data->data, map, max);
856 default:
857 break;
858 };
859 }
860
861 static struct cpu_map_event* cpu_map_event__new(struct cpu_map *map)
862 {
863 size_t size = sizeof(struct cpu_map_event);
864 struct cpu_map_event *event;
865 int max;
866 u16 type;
867
868 event = cpu_map_data__alloc(map, &size, &type, &max);
869 if (!event)
870 return NULL;
871
872 event->header.type = PERF_RECORD_CPU_MAP;
873 event->header.size = size;
874 event->data.type = type;
875
876 cpu_map_data__synthesize(&event->data, map, type, max);
877 return event;
878 }
879
880 int perf_event__synthesize_cpu_map(struct perf_tool *tool,
881 struct cpu_map *map,
882 perf_event__handler_t process,
883 struct machine *machine)
884 {
885 struct cpu_map_event *event;
886 int err;
887
888 event = cpu_map_event__new(map);
889 if (!event)
890 return -ENOMEM;
891
892 err = process(tool, (union perf_event *) event, NULL, machine);
893
894 free(event);
895 return err;
896 }
897
898 int perf_event__synthesize_stat_config(struct perf_tool *tool,
899 struct perf_stat_config *config,
900 perf_event__handler_t process,
901 struct machine *machine)
902 {
903 struct stat_config_event *event;
904 int size, i = 0, err;
905
906 size = sizeof(*event);
907 size += (PERF_STAT_CONFIG_TERM__MAX * sizeof(event->data[0]));
908
909 event = zalloc(size);
910 if (!event)
911 return -ENOMEM;
912
913 event->header.type = PERF_RECORD_STAT_CONFIG;
914 event->header.size = size;
915 event->nr = PERF_STAT_CONFIG_TERM__MAX;
916
917 #define ADD(__term, __val) \
918 event->data[i].tag = PERF_STAT_CONFIG_TERM__##__term; \
919 event->data[i].val = __val; \
920 i++;
921
922 ADD(AGGR_MODE, config->aggr_mode)
923 ADD(INTERVAL, config->interval)
924 ADD(SCALE, config->scale)
925
926 WARN_ONCE(i != PERF_STAT_CONFIG_TERM__MAX,
927 "stat config terms unbalanced\n");
928 #undef ADD
929
930 err = process(tool, (union perf_event *) event, NULL, machine);
931
932 free(event);
933 return err;
934 }
935
936 int perf_event__synthesize_stat(struct perf_tool *tool,
937 u32 cpu, u32 thread, u64 id,
938 struct perf_counts_values *count,
939 perf_event__handler_t process,
940 struct machine *machine)
941 {
942 struct stat_event event;
943
944 event.header.type = PERF_RECORD_STAT;
945 event.header.size = sizeof(event);
946 event.header.misc = 0;
947
948 event.id = id;
949 event.cpu = cpu;
950 event.thread = thread;
951 event.val = count->val;
952 event.ena = count->ena;
953 event.run = count->run;
954
955 return process(tool, (union perf_event *) &event, NULL, machine);
956 }
957
958 int perf_event__synthesize_stat_round(struct perf_tool *tool,
959 u64 evtime, u64 type,
960 perf_event__handler_t process,
961 struct machine *machine)
962 {
963 struct stat_round_event event;
964
965 event.header.type = PERF_RECORD_STAT_ROUND;
966 event.header.size = sizeof(event);
967 event.header.misc = 0;
968
969 event.time = evtime;
970 event.type = type;
971
972 return process(tool, (union perf_event *) &event, NULL, machine);
973 }
974
975 void perf_event__read_stat_config(struct perf_stat_config *config,
976 struct stat_config_event *event)
977 {
978 unsigned i;
979
980 for (i = 0; i < event->nr; i++) {
981
982 switch (event->data[i].tag) {
983 #define CASE(__term, __val) \
984 case PERF_STAT_CONFIG_TERM__##__term: \
985 config->__val = event->data[i].val; \
986 break;
987
988 CASE(AGGR_MODE, aggr_mode)
989 CASE(SCALE, scale)
990 CASE(INTERVAL, interval)
991 #undef CASE
992 default:
993 pr_warning("unknown stat config term %" PRIu64 "\n",
994 event->data[i].tag);
995 }
996 }
997 }
998
999 size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
1000 {
1001 const char *s;
1002
1003 if (event->header.misc & PERF_RECORD_MISC_COMM_EXEC)
1004 s = " exec";
1005 else
1006 s = "";
1007
1008 return fprintf(fp, "%s: %s:%d/%d\n", s, event->comm.comm, event->comm.pid, event->comm.tid);
1009 }
1010
1011 int perf_event__process_comm(struct perf_tool *tool __maybe_unused,
1012 union perf_event *event,
1013 struct perf_sample *sample,
1014 struct machine *machine)
1015 {
1016 return machine__process_comm_event(machine, event, sample);
1017 }
1018
1019 int perf_event__process_lost(struct perf_tool *tool __maybe_unused,
1020 union perf_event *event,
1021 struct perf_sample *sample,
1022 struct machine *machine)
1023 {
1024 return machine__process_lost_event(machine, event, sample);
1025 }
1026
1027 int perf_event__process_aux(struct perf_tool *tool __maybe_unused,
1028 union perf_event *event,
1029 struct perf_sample *sample __maybe_unused,
1030 struct machine *machine)
1031 {
1032 return machine__process_aux_event(machine, event);
1033 }
1034
1035 int perf_event__process_itrace_start(struct perf_tool *tool __maybe_unused,
1036 union perf_event *event,
1037 struct perf_sample *sample __maybe_unused,
1038 struct machine *machine)
1039 {
1040 return machine__process_itrace_start_event(machine, event);
1041 }
1042
1043 int perf_event__process_lost_samples(struct perf_tool *tool __maybe_unused,
1044 union perf_event *event,
1045 struct perf_sample *sample,
1046 struct machine *machine)
1047 {
1048 return machine__process_lost_samples_event(machine, event, sample);
1049 }
1050
1051 int perf_event__process_switch(struct perf_tool *tool __maybe_unused,
1052 union perf_event *event,
1053 struct perf_sample *sample __maybe_unused,
1054 struct machine *machine)
1055 {
1056 return machine__process_switch_event(machine, event);
1057 }
1058
1059 size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
1060 {
1061 return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %c %s\n",
1062 event->mmap.pid, event->mmap.tid, event->mmap.start,
1063 event->mmap.len, event->mmap.pgoff,
1064 (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x',
1065 event->mmap.filename);
1066 }
1067
1068 size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp)
1069 {
1070 return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64
1071 " %02x:%02x %"PRIu64" %"PRIu64"]: %c%c%c%c %s\n",
1072 event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
1073 event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj,
1074 event->mmap2.min, event->mmap2.ino,
1075 event->mmap2.ino_generation,
1076 (event->mmap2.prot & PROT_READ) ? 'r' : '-',
1077 (event->mmap2.prot & PROT_WRITE) ? 'w' : '-',
1078 (event->mmap2.prot & PROT_EXEC) ? 'x' : '-',
1079 (event->mmap2.flags & MAP_SHARED) ? 's' : 'p',
1080 event->mmap2.filename);
1081 }
1082
1083 size_t perf_event__fprintf_thread_map(union perf_event *event, FILE *fp)
1084 {
1085 struct thread_map *threads = thread_map__new_event(&event->thread_map);
1086 size_t ret;
1087
1088 ret = fprintf(fp, " nr: ");
1089
1090 if (threads)
1091 ret += thread_map__fprintf(threads, fp);
1092 else
1093 ret += fprintf(fp, "failed to get threads from event\n");
1094
1095 thread_map__put(threads);
1096 return ret;
1097 }
1098
1099 size_t perf_event__fprintf_cpu_map(union perf_event *event, FILE *fp)
1100 {
1101 struct cpu_map *cpus = cpu_map__new_data(&event->cpu_map.data);
1102 size_t ret;
1103
1104 ret = fprintf(fp, ": ");
1105
1106 if (cpus)
1107 ret += cpu_map__fprintf(cpus, fp);
1108 else
1109 ret += fprintf(fp, "failed to get cpumap from event\n");
1110
1111 cpu_map__put(cpus);
1112 return ret;
1113 }
1114
1115 int perf_event__process_mmap(struct perf_tool *tool __maybe_unused,
1116 union perf_event *event,
1117 struct perf_sample *sample,
1118 struct machine *machine)
1119 {
1120 return machine__process_mmap_event(machine, event, sample);
1121 }
1122
1123 int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused,
1124 union perf_event *event,
1125 struct perf_sample *sample,
1126 struct machine *machine)
1127 {
1128 return machine__process_mmap2_event(machine, event, sample);
1129 }
1130
1131 size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
1132 {
1133 return fprintf(fp, "(%d:%d):(%d:%d)\n",
1134 event->fork.pid, event->fork.tid,
1135 event->fork.ppid, event->fork.ptid);
1136 }
1137
1138 int perf_event__process_fork(struct perf_tool *tool __maybe_unused,
1139 union perf_event *event,
1140 struct perf_sample *sample,
1141 struct machine *machine)
1142 {
1143 return machine__process_fork_event(machine, event, sample);
1144 }
1145
1146 int perf_event__process_exit(struct perf_tool *tool __maybe_unused,
1147 union perf_event *event,
1148 struct perf_sample *sample,
1149 struct machine *machine)
1150 {
1151 return machine__process_exit_event(machine, event, sample);
1152 }
1153
1154 size_t perf_event__fprintf_aux(union perf_event *event, FILE *fp)
1155 {
1156 return fprintf(fp, " offset: %#"PRIx64" size: %#"PRIx64" flags: %#"PRIx64" [%s%s]\n",
1157 event->aux.aux_offset, event->aux.aux_size,
1158 event->aux.flags,
1159 event->aux.flags & PERF_AUX_FLAG_TRUNCATED ? "T" : "",
1160 event->aux.flags & PERF_AUX_FLAG_OVERWRITE ? "O" : "");
1161 }
1162
1163 size_t perf_event__fprintf_itrace_start(union perf_event *event, FILE *fp)
1164 {
1165 return fprintf(fp, " pid: %u tid: %u\n",
1166 event->itrace_start.pid, event->itrace_start.tid);
1167 }
1168
1169 size_t perf_event__fprintf_switch(union perf_event *event, FILE *fp)
1170 {
1171 bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT;
1172 const char *in_out = out ? "OUT" : "IN ";
1173
1174 if (event->header.type == PERF_RECORD_SWITCH)
1175 return fprintf(fp, " %s\n", in_out);
1176
1177 return fprintf(fp, " %s %s pid/tid: %5u/%-5u\n",
1178 in_out, out ? "next" : "prev",
1179 event->context_switch.next_prev_pid,
1180 event->context_switch.next_prev_tid);
1181 }
1182
1183 size_t perf_event__fprintf(union perf_event *event, FILE *fp)
1184 {
1185 size_t ret = fprintf(fp, "PERF_RECORD_%s",
1186 perf_event__name(event->header.type));
1187
1188 switch (event->header.type) {
1189 case PERF_RECORD_COMM:
1190 ret += perf_event__fprintf_comm(event, fp);
1191 break;
1192 case PERF_RECORD_FORK:
1193 case PERF_RECORD_EXIT:
1194 ret += perf_event__fprintf_task(event, fp);
1195 break;
1196 case PERF_RECORD_MMAP:
1197 ret += perf_event__fprintf_mmap(event, fp);
1198 break;
1199 case PERF_RECORD_MMAP2:
1200 ret += perf_event__fprintf_mmap2(event, fp);
1201 break;
1202 case PERF_RECORD_AUX:
1203 ret += perf_event__fprintf_aux(event, fp);
1204 break;
1205 case PERF_RECORD_ITRACE_START:
1206 ret += perf_event__fprintf_itrace_start(event, fp);
1207 break;
1208 case PERF_RECORD_SWITCH:
1209 case PERF_RECORD_SWITCH_CPU_WIDE:
1210 ret += perf_event__fprintf_switch(event, fp);
1211 break;
1212 default:
1213 ret += fprintf(fp, "\n");
1214 }
1215
1216 return ret;
1217 }
1218
1219 int perf_event__process(struct perf_tool *tool __maybe_unused,
1220 union perf_event *event,
1221 struct perf_sample *sample,
1222 struct machine *machine)
1223 {
1224 return machine__process_event(machine, event, sample);
1225 }
1226
1227 void thread__find_addr_map(struct thread *thread, u8 cpumode,
1228 enum map_type type, u64 addr,
1229 struct addr_location *al)
1230 {
1231 struct map_groups *mg = thread->mg;
1232 struct machine *machine = mg->machine;
1233 bool load_map = false;
1234
1235 al->machine = machine;
1236 al->thread = thread;
1237 al->addr = addr;
1238 al->cpumode = cpumode;
1239 al->filtered = 0;
1240
1241 if (machine == NULL) {
1242 al->map = NULL;
1243 return;
1244 }
1245
1246 if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
1247 al->level = 'k';
1248 mg = &machine->kmaps;
1249 load_map = true;
1250 } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
1251 al->level = '.';
1252 } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
1253 al->level = 'g';
1254 mg = &machine->kmaps;
1255 load_map = true;
1256 } else if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) {
1257 al->level = 'u';
1258 } else {
1259 al->level = 'H';
1260 al->map = NULL;
1261
1262 if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
1263 cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
1264 !perf_guest)
1265 al->filtered |= (1 << HIST_FILTER__GUEST);
1266 if ((cpumode == PERF_RECORD_MISC_USER ||
1267 cpumode == PERF_RECORD_MISC_KERNEL) &&
1268 !perf_host)
1269 al->filtered |= (1 << HIST_FILTER__HOST);
1270
1271 return;
1272 }
1273 try_again:
1274 al->map = map_groups__find(mg, type, al->addr);
1275 if (al->map == NULL) {
1276 /*
1277 * If this is outside of all known maps, and is a negative
1278 * address, try to look it up in the kernel dso, as it might be
1279 * a vsyscall or vdso (which executes in user-mode).
1280 *
1281 * XXX This is nasty, we should have a symbol list in the
1282 * "[vdso]" dso, but for now lets use the old trick of looking
1283 * in the whole kernel symbol list.
1284 */
1285 if (cpumode == PERF_RECORD_MISC_USER && machine &&
1286 mg != &machine->kmaps &&
1287 machine__kernel_ip(machine, al->addr)) {
1288 mg = &machine->kmaps;
1289 load_map = true;
1290 goto try_again;
1291 }
1292 } else {
1293 /*
1294 * Kernel maps might be changed when loading symbols so loading
1295 * must be done prior to using kernel maps.
1296 */
1297 if (load_map)
1298 map__load(al->map);
1299 al->addr = al->map->map_ip(al->map, al->addr);
1300 }
1301 }
1302
1303 void thread__find_addr_location(struct thread *thread,
1304 u8 cpumode, enum map_type type, u64 addr,
1305 struct addr_location *al)
1306 {
1307 thread__find_addr_map(thread, cpumode, type, addr, al);
1308 if (al->map != NULL)
1309 al->sym = map__find_symbol(al->map, al->addr);
1310 else
1311 al->sym = NULL;
1312 }
1313
1314 /*
1315 * Callers need to drop the reference to al->thread, obtained in
1316 * machine__findnew_thread()
1317 */
1318 int machine__resolve(struct machine *machine, struct addr_location *al,
1319 struct perf_sample *sample)
1320 {
1321 struct thread *thread = machine__findnew_thread(machine, sample->pid,
1322 sample->tid);
1323
1324 if (thread == NULL)
1325 return -1;
1326
1327 dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
1328 /*
1329 * Have we already created the kernel maps for this machine?
1330 *
1331 * This should have happened earlier, when we processed the kernel MMAP
1332 * events, but for older perf.data files there was no such thing, so do
1333 * it now.
1334 */
1335 if (sample->cpumode == PERF_RECORD_MISC_KERNEL &&
1336 machine__kernel_map(machine) == NULL)
1337 machine__create_kernel_maps(machine);
1338
1339 thread__find_addr_map(thread, sample->cpumode, MAP__FUNCTION, sample->ip, al);
1340 dump_printf(" ...... dso: %s\n",
1341 al->map ? al->map->dso->long_name :
1342 al->level == 'H' ? "[hypervisor]" : "<not found>");
1343
1344 if (thread__is_filtered(thread))
1345 al->filtered |= (1 << HIST_FILTER__THREAD);
1346
1347 al->sym = NULL;
1348 al->cpu = sample->cpu;
1349 al->socket = -1;
1350
1351 if (al->cpu >= 0) {
1352 struct perf_env *env = machine->env;
1353
1354 if (env && env->cpu)
1355 al->socket = env->cpu[al->cpu].socket_id;
1356 }
1357
1358 if (al->map) {
1359 struct dso *dso = al->map->dso;
1360
1361 if (symbol_conf.dso_list &&
1362 (!dso || !(strlist__has_entry(symbol_conf.dso_list,
1363 dso->short_name) ||
1364 (dso->short_name != dso->long_name &&
1365 strlist__has_entry(symbol_conf.dso_list,
1366 dso->long_name))))) {
1367 al->filtered |= (1 << HIST_FILTER__DSO);
1368 }
1369
1370 al->sym = map__find_symbol(al->map, al->addr);
1371 }
1372
1373 if (symbol_conf.sym_list &&
1374 (!al->sym || !strlist__has_entry(symbol_conf.sym_list,
1375 al->sym->name))) {
1376 al->filtered |= (1 << HIST_FILTER__SYMBOL);
1377 }
1378
1379 return 0;
1380 }
1381
1382 /*
1383 * The preprocess_sample method will return with reference counts for the
1384 * in it, when done using (and perhaps getting ref counts if needing to
1385 * keep a pointer to one of those entries) it must be paired with
1386 * addr_location__put(), so that the refcounts can be decremented.
1387 */
1388 void addr_location__put(struct addr_location *al)
1389 {
1390 thread__zput(al->thread);
1391 }
1392
1393 bool is_bts_event(struct perf_event_attr *attr)
1394 {
1395 return attr->type == PERF_TYPE_HARDWARE &&
1396 (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) &&
1397 attr->sample_period == 1;
1398 }
1399
1400 bool sample_addr_correlates_sym(struct perf_event_attr *attr)
1401 {
1402 if (attr->type == PERF_TYPE_SOFTWARE &&
1403 (attr->config == PERF_COUNT_SW_PAGE_FAULTS ||
1404 attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
1405 attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ))
1406 return true;
1407
1408 if (is_bts_event(attr))
1409 return true;
1410
1411 return false;
1412 }
1413
1414 void thread__resolve(struct thread *thread, struct addr_location *al,
1415 struct perf_sample *sample)
1416 {
1417 thread__find_addr_map(thread, sample->cpumode, MAP__FUNCTION, sample->addr, al);
1418 if (!al->map)
1419 thread__find_addr_map(thread, sample->cpumode, MAP__VARIABLE,
1420 sample->addr, al);
1421
1422 al->cpu = sample->cpu;
1423 al->sym = NULL;
1424
1425 if (al->map)
1426 al->sym = map__find_symbol(al->map, al->addr);
1427 }
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