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Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
[mirror_ubuntu-hirsute-kernel.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 [PERF_RECORD_TIME_CONV] = "TIME_CONV",
49 };
50
51 const char *perf_event__name(unsigned int id)
52 {
53 if (id >= ARRAY_SIZE(perf_event__names))
54 return "INVALID";
55 if (!perf_event__names[id])
56 return "UNKNOWN";
57 return perf_event__names[id];
58 }
59
60 static int perf_tool__process_synth_event(struct perf_tool *tool,
61 union perf_event *event,
62 struct machine *machine,
63 perf_event__handler_t process)
64 {
65 struct perf_sample synth_sample = {
66 .pid = -1,
67 .tid = -1,
68 .time = -1,
69 .stream_id = -1,
70 .cpu = -1,
71 .period = 1,
72 .cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK,
73 };
74
75 return process(tool, event, &synth_sample, machine);
76 };
77
78 /*
79 * Assumes that the first 4095 bytes of /proc/pid/stat contains
80 * the comm, tgid and ppid.
81 */
82 static int perf_event__get_comm_ids(pid_t pid, char *comm, size_t len,
83 pid_t *tgid, pid_t *ppid)
84 {
85 char filename[PATH_MAX];
86 char bf[4096];
87 int fd;
88 size_t size = 0;
89 ssize_t n;
90 char *nl, *name, *tgids, *ppids;
91
92 *tgid = -1;
93 *ppid = -1;
94
95 snprintf(filename, sizeof(filename), "/proc/%d/status", pid);
96
97 fd = open(filename, O_RDONLY);
98 if (fd < 0) {
99 pr_debug("couldn't open %s\n", filename);
100 return -1;
101 }
102
103 n = read(fd, bf, sizeof(bf) - 1);
104 close(fd);
105 if (n <= 0) {
106 pr_warning("Couldn't get COMM, tigd and ppid for pid %d\n",
107 pid);
108 return -1;
109 }
110 bf[n] = '\0';
111
112 name = strstr(bf, "Name:");
113 tgids = strstr(bf, "Tgid:");
114 ppids = strstr(bf, "PPid:");
115
116 if (name) {
117 name += 5; /* strlen("Name:") */
118
119 while (*name && isspace(*name))
120 ++name;
121
122 nl = strchr(name, '\n');
123 if (nl)
124 *nl = '\0';
125
126 size = strlen(name);
127 if (size >= len)
128 size = len - 1;
129 memcpy(comm, name, size);
130 comm[size] = '\0';
131 } else {
132 pr_debug("Name: string not found for pid %d\n", pid);
133 }
134
135 if (tgids) {
136 tgids += 5; /* strlen("Tgid:") */
137 *tgid = atoi(tgids);
138 } else {
139 pr_debug("Tgid: string not found for pid %d\n", pid);
140 }
141
142 if (ppids) {
143 ppids += 5; /* strlen("PPid:") */
144 *ppid = atoi(ppids);
145 } else {
146 pr_debug("PPid: string not found for pid %d\n", pid);
147 }
148
149 return 0;
150 }
151
152 static int perf_event__prepare_comm(union perf_event *event, pid_t pid,
153 struct machine *machine,
154 pid_t *tgid, pid_t *ppid)
155 {
156 size_t size;
157
158 *ppid = -1;
159
160 memset(&event->comm, 0, sizeof(event->comm));
161
162 if (machine__is_host(machine)) {
163 if (perf_event__get_comm_ids(pid, event->comm.comm,
164 sizeof(event->comm.comm),
165 tgid, ppid) != 0) {
166 return -1;
167 }
168 } else {
169 *tgid = machine->pid;
170 }
171
172 if (*tgid < 0)
173 return -1;
174
175 event->comm.pid = *tgid;
176 event->comm.header.type = PERF_RECORD_COMM;
177
178 size = strlen(event->comm.comm) + 1;
179 size = PERF_ALIGN(size, sizeof(u64));
180 memset(event->comm.comm + size, 0, machine->id_hdr_size);
181 event->comm.header.size = (sizeof(event->comm) -
182 (sizeof(event->comm.comm) - size) +
183 machine->id_hdr_size);
184 event->comm.tid = pid;
185
186 return 0;
187 }
188
189 pid_t perf_event__synthesize_comm(struct perf_tool *tool,
190 union perf_event *event, pid_t pid,
191 perf_event__handler_t process,
192 struct machine *machine)
193 {
194 pid_t tgid, ppid;
195
196 if (perf_event__prepare_comm(event, pid, machine, &tgid, &ppid) != 0)
197 return -1;
198
199 if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
200 return -1;
201
202 return tgid;
203 }
204
205 static int perf_event__synthesize_fork(struct perf_tool *tool,
206 union perf_event *event,
207 pid_t pid, pid_t tgid, pid_t ppid,
208 perf_event__handler_t process,
209 struct machine *machine)
210 {
211 memset(&event->fork, 0, sizeof(event->fork) + machine->id_hdr_size);
212
213 /*
214 * for main thread set parent to ppid from status file. For other
215 * threads set parent pid to main thread. ie., assume main thread
216 * spawns all threads in a process
217 */
218 if (tgid == pid) {
219 event->fork.ppid = ppid;
220 event->fork.ptid = ppid;
221 } else {
222 event->fork.ppid = tgid;
223 event->fork.ptid = tgid;
224 }
225 event->fork.pid = tgid;
226 event->fork.tid = pid;
227 event->fork.header.type = PERF_RECORD_FORK;
228
229 event->fork.header.size = (sizeof(event->fork) + machine->id_hdr_size);
230
231 if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
232 return -1;
233
234 return 0;
235 }
236
237 int perf_event__synthesize_mmap_events(struct perf_tool *tool,
238 union perf_event *event,
239 pid_t pid, pid_t tgid,
240 perf_event__handler_t process,
241 struct machine *machine,
242 bool mmap_data,
243 unsigned int proc_map_timeout)
244 {
245 char filename[PATH_MAX];
246 FILE *fp;
247 unsigned long long t;
248 bool truncation = false;
249 unsigned long long timeout = proc_map_timeout * 1000000ULL;
250 int rc = 0;
251
252 if (machine__is_default_guest(machine))
253 return 0;
254
255 snprintf(filename, sizeof(filename), "%s/proc/%d/maps",
256 machine->root_dir, pid);
257
258 fp = fopen(filename, "r");
259 if (fp == NULL) {
260 /*
261 * We raced with a task exiting - just return:
262 */
263 pr_debug("couldn't open %s\n", filename);
264 return -1;
265 }
266
267 event->header.type = PERF_RECORD_MMAP2;
268 t = rdclock();
269
270 while (1) {
271 char bf[BUFSIZ];
272 char prot[5];
273 char execname[PATH_MAX];
274 char anonstr[] = "//anon";
275 unsigned int ino;
276 size_t size;
277 ssize_t n;
278
279 if (fgets(bf, sizeof(bf), fp) == NULL)
280 break;
281
282 if ((rdclock() - t) > timeout) {
283 pr_warning("Reading %s time out. "
284 "You may want to increase "
285 "the time limit by --proc-map-timeout\n",
286 filename);
287 truncation = true;
288 goto out;
289 }
290
291 /* ensure null termination since stack will be reused. */
292 strcpy(execname, "");
293
294 /* 00400000-0040c000 r-xp 00000000 fd:01 41038 /bin/cat */
295 n = sscanf(bf, "%"PRIx64"-%"PRIx64" %s %"PRIx64" %x:%x %u %[^\n]\n",
296 &event->mmap2.start, &event->mmap2.len, prot,
297 &event->mmap2.pgoff, &event->mmap2.maj,
298 &event->mmap2.min,
299 &ino, execname);
300
301 /*
302 * Anon maps don't have the execname.
303 */
304 if (n < 7)
305 continue;
306
307 event->mmap2.ino = (u64)ino;
308
309 /*
310 * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
311 */
312 if (machine__is_host(machine))
313 event->header.misc = PERF_RECORD_MISC_USER;
314 else
315 event->header.misc = PERF_RECORD_MISC_GUEST_USER;
316
317 /* map protection and flags bits */
318 event->mmap2.prot = 0;
319 event->mmap2.flags = 0;
320 if (prot[0] == 'r')
321 event->mmap2.prot |= PROT_READ;
322 if (prot[1] == 'w')
323 event->mmap2.prot |= PROT_WRITE;
324 if (prot[2] == 'x')
325 event->mmap2.prot |= PROT_EXEC;
326
327 if (prot[3] == 's')
328 event->mmap2.flags |= MAP_SHARED;
329 else
330 event->mmap2.flags |= MAP_PRIVATE;
331
332 if (prot[2] != 'x') {
333 if (!mmap_data || prot[0] != 'r')
334 continue;
335
336 event->header.misc |= PERF_RECORD_MISC_MMAP_DATA;
337 }
338
339 out:
340 if (truncation)
341 event->header.misc |= PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT;
342
343 if (!strcmp(execname, ""))
344 strcpy(execname, anonstr);
345
346 size = strlen(execname) + 1;
347 memcpy(event->mmap2.filename, execname, size);
348 size = PERF_ALIGN(size, sizeof(u64));
349 event->mmap2.len -= event->mmap.start;
350 event->mmap2.header.size = (sizeof(event->mmap2) -
351 (sizeof(event->mmap2.filename) - size));
352 memset(event->mmap2.filename + size, 0, machine->id_hdr_size);
353 event->mmap2.header.size += machine->id_hdr_size;
354 event->mmap2.pid = tgid;
355 event->mmap2.tid = pid;
356
357 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
358 rc = -1;
359 break;
360 }
361
362 if (truncation)
363 break;
364 }
365
366 fclose(fp);
367 return rc;
368 }
369
370 int perf_event__synthesize_modules(struct perf_tool *tool,
371 perf_event__handler_t process,
372 struct machine *machine)
373 {
374 int rc = 0;
375 struct map *pos;
376 struct map_groups *kmaps = &machine->kmaps;
377 struct maps *maps = &kmaps->maps[MAP__FUNCTION];
378 union perf_event *event = zalloc((sizeof(event->mmap) +
379 machine->id_hdr_size));
380 if (event == NULL) {
381 pr_debug("Not enough memory synthesizing mmap event "
382 "for kernel modules\n");
383 return -1;
384 }
385
386 event->header.type = PERF_RECORD_MMAP;
387
388 /*
389 * kernel uses 0 for user space maps, see kernel/perf_event.c
390 * __perf_event_mmap
391 */
392 if (machine__is_host(machine))
393 event->header.misc = PERF_RECORD_MISC_KERNEL;
394 else
395 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
396
397 for (pos = maps__first(maps); pos; pos = map__next(pos)) {
398 size_t size;
399
400 if (__map__is_kernel(pos))
401 continue;
402
403 size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
404 event->mmap.header.type = PERF_RECORD_MMAP;
405 event->mmap.header.size = (sizeof(event->mmap) -
406 (sizeof(event->mmap.filename) - size));
407 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
408 event->mmap.header.size += machine->id_hdr_size;
409 event->mmap.start = pos->start;
410 event->mmap.len = pos->end - pos->start;
411 event->mmap.pid = machine->pid;
412
413 memcpy(event->mmap.filename, pos->dso->long_name,
414 pos->dso->long_name_len + 1);
415 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
416 rc = -1;
417 break;
418 }
419 }
420
421 free(event);
422 return rc;
423 }
424
425 static int __event__synthesize_thread(union perf_event *comm_event,
426 union perf_event *mmap_event,
427 union perf_event *fork_event,
428 pid_t pid, int full,
429 perf_event__handler_t process,
430 struct perf_tool *tool,
431 struct machine *machine,
432 bool mmap_data,
433 unsigned int proc_map_timeout)
434 {
435 char filename[PATH_MAX];
436 DIR *tasks;
437 struct dirent *dirent;
438 pid_t tgid, ppid;
439 int rc = 0;
440
441 /* special case: only send one comm event using passed in pid */
442 if (!full) {
443 tgid = perf_event__synthesize_comm(tool, comm_event, pid,
444 process, machine);
445
446 if (tgid == -1)
447 return -1;
448
449 return perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
450 process, machine, mmap_data,
451 proc_map_timeout);
452 }
453
454 if (machine__is_default_guest(machine))
455 return 0;
456
457 snprintf(filename, sizeof(filename), "%s/proc/%d/task",
458 machine->root_dir, pid);
459
460 tasks = opendir(filename);
461 if (tasks == NULL) {
462 pr_debug("couldn't open %s\n", filename);
463 return 0;
464 }
465
466 while ((dirent = readdir(tasks)) != NULL) {
467 char *end;
468 pid_t _pid;
469
470 _pid = strtol(dirent->d_name, &end, 10);
471 if (*end)
472 continue;
473
474 rc = -1;
475 if (perf_event__prepare_comm(comm_event, _pid, machine,
476 &tgid, &ppid) != 0)
477 break;
478
479 if (perf_event__synthesize_fork(tool, fork_event, _pid, tgid,
480 ppid, process, machine) < 0)
481 break;
482 /*
483 * Send the prepared comm event
484 */
485 if (perf_tool__process_synth_event(tool, comm_event, machine, process) != 0)
486 break;
487
488 rc = 0;
489 if (_pid == pid) {
490 /* process the parent's maps too */
491 rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
492 process, machine, mmap_data, proc_map_timeout);
493 if (rc)
494 break;
495 }
496 }
497
498 closedir(tasks);
499 return rc;
500 }
501
502 int perf_event__synthesize_thread_map(struct perf_tool *tool,
503 struct thread_map *threads,
504 perf_event__handler_t process,
505 struct machine *machine,
506 bool mmap_data,
507 unsigned int proc_map_timeout)
508 {
509 union perf_event *comm_event, *mmap_event, *fork_event;
510 int err = -1, thread, j;
511
512 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
513 if (comm_event == NULL)
514 goto out;
515
516 mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
517 if (mmap_event == NULL)
518 goto out_free_comm;
519
520 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
521 if (fork_event == NULL)
522 goto out_free_mmap;
523
524 err = 0;
525 for (thread = 0; thread < threads->nr; ++thread) {
526 if (__event__synthesize_thread(comm_event, mmap_event,
527 fork_event,
528 thread_map__pid(threads, thread), 0,
529 process, tool, machine,
530 mmap_data, proc_map_timeout)) {
531 err = -1;
532 break;
533 }
534
535 /*
536 * comm.pid is set to thread group id by
537 * perf_event__synthesize_comm
538 */
539 if ((int) comm_event->comm.pid != thread_map__pid(threads, thread)) {
540 bool need_leader = true;
541
542 /* is thread group leader in thread_map? */
543 for (j = 0; j < threads->nr; ++j) {
544 if ((int) comm_event->comm.pid == thread_map__pid(threads, j)) {
545 need_leader = false;
546 break;
547 }
548 }
549
550 /* if not, generate events for it */
551 if (need_leader &&
552 __event__synthesize_thread(comm_event, mmap_event,
553 fork_event,
554 comm_event->comm.pid, 0,
555 process, tool, machine,
556 mmap_data, proc_map_timeout)) {
557 err = -1;
558 break;
559 }
560 }
561 }
562 free(fork_event);
563 out_free_mmap:
564 free(mmap_event);
565 out_free_comm:
566 free(comm_event);
567 out:
568 return err;
569 }
570
571 int perf_event__synthesize_threads(struct perf_tool *tool,
572 perf_event__handler_t process,
573 struct machine *machine,
574 bool mmap_data,
575 unsigned int proc_map_timeout)
576 {
577 DIR *proc;
578 char proc_path[PATH_MAX];
579 struct dirent *dirent;
580 union perf_event *comm_event, *mmap_event, *fork_event;
581 int err = -1;
582
583 if (machine__is_default_guest(machine))
584 return 0;
585
586 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
587 if (comm_event == NULL)
588 goto out;
589
590 mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
591 if (mmap_event == NULL)
592 goto out_free_comm;
593
594 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
595 if (fork_event == NULL)
596 goto out_free_mmap;
597
598 snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir);
599 proc = opendir(proc_path);
600
601 if (proc == NULL)
602 goto out_free_fork;
603
604 while ((dirent = readdir(proc)) != NULL) {
605 char *end;
606 pid_t pid = strtol(dirent->d_name, &end, 10);
607
608 if (*end) /* only interested in proper numerical dirents */
609 continue;
610 /*
611 * We may race with exiting thread, so don't stop just because
612 * one thread couldn't be synthesized.
613 */
614 __event__synthesize_thread(comm_event, mmap_event, fork_event, pid,
615 1, process, tool, machine, mmap_data,
616 proc_map_timeout);
617 }
618
619 err = 0;
620 closedir(proc);
621 out_free_fork:
622 free(fork_event);
623 out_free_mmap:
624 free(mmap_event);
625 out_free_comm:
626 free(comm_event);
627 out:
628 return err;
629 }
630
631 struct process_symbol_args {
632 const char *name;
633 u64 start;
634 };
635
636 static int find_symbol_cb(void *arg, const char *name, char type,
637 u64 start)
638 {
639 struct process_symbol_args *args = arg;
640
641 /*
642 * Must be a function or at least an alias, as in PARISC64, where "_text" is
643 * an 'A' to the same address as "_stext".
644 */
645 if (!(symbol_type__is_a(type, MAP__FUNCTION) ||
646 type == 'A') || strcmp(name, args->name))
647 return 0;
648
649 args->start = start;
650 return 1;
651 }
652
653 u64 kallsyms__get_function_start(const char *kallsyms_filename,
654 const char *symbol_name)
655 {
656 struct process_symbol_args args = { .name = symbol_name, };
657
658 if (kallsyms__parse(kallsyms_filename, &args, find_symbol_cb) <= 0)
659 return 0;
660
661 return args.start;
662 }
663
664 int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
665 perf_event__handler_t process,
666 struct machine *machine)
667 {
668 size_t size;
669 const char *mmap_name;
670 char name_buff[PATH_MAX];
671 struct map *map = machine__kernel_map(machine);
672 struct kmap *kmap;
673 int err;
674 union perf_event *event;
675
676 if (map == NULL)
677 return -1;
678
679 /*
680 * We should get this from /sys/kernel/sections/.text, but till that is
681 * available use this, and after it is use this as a fallback for older
682 * kernels.
683 */
684 event = zalloc((sizeof(event->mmap) + machine->id_hdr_size));
685 if (event == NULL) {
686 pr_debug("Not enough memory synthesizing mmap event "
687 "for kernel modules\n");
688 return -1;
689 }
690
691 mmap_name = machine__mmap_name(machine, name_buff, sizeof(name_buff));
692 if (machine__is_host(machine)) {
693 /*
694 * kernel uses PERF_RECORD_MISC_USER for user space maps,
695 * see kernel/perf_event.c __perf_event_mmap
696 */
697 event->header.misc = PERF_RECORD_MISC_KERNEL;
698 } else {
699 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
700 }
701
702 kmap = map__kmap(map);
703 size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
704 "%s%s", mmap_name, kmap->ref_reloc_sym->name) + 1;
705 size = PERF_ALIGN(size, sizeof(u64));
706 event->mmap.header.type = PERF_RECORD_MMAP;
707 event->mmap.header.size = (sizeof(event->mmap) -
708 (sizeof(event->mmap.filename) - size) + machine->id_hdr_size);
709 event->mmap.pgoff = kmap->ref_reloc_sym->addr;
710 event->mmap.start = map->start;
711 event->mmap.len = map->end - event->mmap.start;
712 event->mmap.pid = machine->pid;
713
714 err = perf_tool__process_synth_event(tool, event, machine, process);
715 free(event);
716
717 return err;
718 }
719
720 int perf_event__synthesize_thread_map2(struct perf_tool *tool,
721 struct thread_map *threads,
722 perf_event__handler_t process,
723 struct machine *machine)
724 {
725 union perf_event *event;
726 int i, err, size;
727
728 size = sizeof(event->thread_map);
729 size += threads->nr * sizeof(event->thread_map.entries[0]);
730
731 event = zalloc(size);
732 if (!event)
733 return -ENOMEM;
734
735 event->header.type = PERF_RECORD_THREAD_MAP;
736 event->header.size = size;
737 event->thread_map.nr = threads->nr;
738
739 for (i = 0; i < threads->nr; i++) {
740 struct thread_map_event_entry *entry = &event->thread_map.entries[i];
741 char *comm = thread_map__comm(threads, i);
742
743 if (!comm)
744 comm = (char *) "";
745
746 entry->pid = thread_map__pid(threads, i);
747 strncpy((char *) &entry->comm, comm, sizeof(entry->comm));
748 }
749
750 err = process(tool, event, NULL, machine);
751
752 free(event);
753 return err;
754 }
755
756 static void synthesize_cpus(struct cpu_map_entries *cpus,
757 struct cpu_map *map)
758 {
759 int i;
760
761 cpus->nr = map->nr;
762
763 for (i = 0; i < map->nr; i++)
764 cpus->cpu[i] = map->map[i];
765 }
766
767 static void synthesize_mask(struct cpu_map_mask *mask,
768 struct cpu_map *map, int max)
769 {
770 int i;
771
772 mask->nr = BITS_TO_LONGS(max);
773 mask->long_size = sizeof(long);
774
775 for (i = 0; i < map->nr; i++)
776 set_bit(map->map[i], mask->mask);
777 }
778
779 static size_t cpus_size(struct cpu_map *map)
780 {
781 return sizeof(struct cpu_map_entries) + map->nr * sizeof(u16);
782 }
783
784 static size_t mask_size(struct cpu_map *map, int *max)
785 {
786 int i;
787
788 *max = 0;
789
790 for (i = 0; i < map->nr; i++) {
791 /* bit possition of the cpu is + 1 */
792 int bit = map->map[i] + 1;
793
794 if (bit > *max)
795 *max = bit;
796 }
797
798 return sizeof(struct cpu_map_mask) + BITS_TO_LONGS(*max) * sizeof(long);
799 }
800
801 void *cpu_map_data__alloc(struct cpu_map *map, size_t *size, u16 *type, int *max)
802 {
803 size_t size_cpus, size_mask;
804 bool is_dummy = cpu_map__empty(map);
805
806 /*
807 * Both array and mask data have variable size based
808 * on the number of cpus and their actual values.
809 * The size of the 'struct cpu_map_data' is:
810 *
811 * array = size of 'struct cpu_map_entries' +
812 * number of cpus * sizeof(u64)
813 *
814 * mask = size of 'struct cpu_map_mask' +
815 * maximum cpu bit converted to size of longs
816 *
817 * and finaly + the size of 'struct cpu_map_data'.
818 */
819 size_cpus = cpus_size(map);
820 size_mask = mask_size(map, max);
821
822 if (is_dummy || (size_cpus < size_mask)) {
823 *size += size_cpus;
824 *type = PERF_CPU_MAP__CPUS;
825 } else {
826 *size += size_mask;
827 *type = PERF_CPU_MAP__MASK;
828 }
829
830 *size += sizeof(struct cpu_map_data);
831 return zalloc(*size);
832 }
833
834 void cpu_map_data__synthesize(struct cpu_map_data *data, struct cpu_map *map,
835 u16 type, int max)
836 {
837 data->type = type;
838
839 switch (type) {
840 case PERF_CPU_MAP__CPUS:
841 synthesize_cpus((struct cpu_map_entries *) data->data, map);
842 break;
843 case PERF_CPU_MAP__MASK:
844 synthesize_mask((struct cpu_map_mask *) data->data, map, max);
845 default:
846 break;
847 };
848 }
849
850 static struct cpu_map_event* cpu_map_event__new(struct cpu_map *map)
851 {
852 size_t size = sizeof(struct cpu_map_event);
853 struct cpu_map_event *event;
854 int max;
855 u16 type;
856
857 event = cpu_map_data__alloc(map, &size, &type, &max);
858 if (!event)
859 return NULL;
860
861 event->header.type = PERF_RECORD_CPU_MAP;
862 event->header.size = size;
863 event->data.type = type;
864
865 cpu_map_data__synthesize(&event->data, map, type, max);
866 return event;
867 }
868
869 int perf_event__synthesize_cpu_map(struct perf_tool *tool,
870 struct cpu_map *map,
871 perf_event__handler_t process,
872 struct machine *machine)
873 {
874 struct cpu_map_event *event;
875 int err;
876
877 event = cpu_map_event__new(map);
878 if (!event)
879 return -ENOMEM;
880
881 err = process(tool, (union perf_event *) event, NULL, machine);
882
883 free(event);
884 return err;
885 }
886
887 int perf_event__synthesize_stat_config(struct perf_tool *tool,
888 struct perf_stat_config *config,
889 perf_event__handler_t process,
890 struct machine *machine)
891 {
892 struct stat_config_event *event;
893 int size, i = 0, err;
894
895 size = sizeof(*event);
896 size += (PERF_STAT_CONFIG_TERM__MAX * sizeof(event->data[0]));
897
898 event = zalloc(size);
899 if (!event)
900 return -ENOMEM;
901
902 event->header.type = PERF_RECORD_STAT_CONFIG;
903 event->header.size = size;
904 event->nr = PERF_STAT_CONFIG_TERM__MAX;
905
906 #define ADD(__term, __val) \
907 event->data[i].tag = PERF_STAT_CONFIG_TERM__##__term; \
908 event->data[i].val = __val; \
909 i++;
910
911 ADD(AGGR_MODE, config->aggr_mode)
912 ADD(INTERVAL, config->interval)
913 ADD(SCALE, config->scale)
914
915 WARN_ONCE(i != PERF_STAT_CONFIG_TERM__MAX,
916 "stat config terms unbalanced\n");
917 #undef ADD
918
919 err = process(tool, (union perf_event *) event, NULL, machine);
920
921 free(event);
922 return err;
923 }
924
925 int perf_event__synthesize_stat(struct perf_tool *tool,
926 u32 cpu, u32 thread, u64 id,
927 struct perf_counts_values *count,
928 perf_event__handler_t process,
929 struct machine *machine)
930 {
931 struct stat_event event;
932
933 event.header.type = PERF_RECORD_STAT;
934 event.header.size = sizeof(event);
935 event.header.misc = 0;
936
937 event.id = id;
938 event.cpu = cpu;
939 event.thread = thread;
940 event.val = count->val;
941 event.ena = count->ena;
942 event.run = count->run;
943
944 return process(tool, (union perf_event *) &event, NULL, machine);
945 }
946
947 int perf_event__synthesize_stat_round(struct perf_tool *tool,
948 u64 evtime, u64 type,
949 perf_event__handler_t process,
950 struct machine *machine)
951 {
952 struct stat_round_event event;
953
954 event.header.type = PERF_RECORD_STAT_ROUND;
955 event.header.size = sizeof(event);
956 event.header.misc = 0;
957
958 event.time = evtime;
959 event.type = type;
960
961 return process(tool, (union perf_event *) &event, NULL, machine);
962 }
963
964 void perf_event__read_stat_config(struct perf_stat_config *config,
965 struct stat_config_event *event)
966 {
967 unsigned i;
968
969 for (i = 0; i < event->nr; i++) {
970
971 switch (event->data[i].tag) {
972 #define CASE(__term, __val) \
973 case PERF_STAT_CONFIG_TERM__##__term: \
974 config->__val = event->data[i].val; \
975 break;
976
977 CASE(AGGR_MODE, aggr_mode)
978 CASE(SCALE, scale)
979 CASE(INTERVAL, interval)
980 #undef CASE
981 default:
982 pr_warning("unknown stat config term %" PRIu64 "\n",
983 event->data[i].tag);
984 }
985 }
986 }
987
988 size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
989 {
990 const char *s;
991
992 if (event->header.misc & PERF_RECORD_MISC_COMM_EXEC)
993 s = " exec";
994 else
995 s = "";
996
997 return fprintf(fp, "%s: %s:%d/%d\n", s, event->comm.comm, event->comm.pid, event->comm.tid);
998 }
999
1000 int perf_event__process_comm(struct perf_tool *tool __maybe_unused,
1001 union perf_event *event,
1002 struct perf_sample *sample,
1003 struct machine *machine)
1004 {
1005 return machine__process_comm_event(machine, event, sample);
1006 }
1007
1008 int perf_event__process_lost(struct perf_tool *tool __maybe_unused,
1009 union perf_event *event,
1010 struct perf_sample *sample,
1011 struct machine *machine)
1012 {
1013 return machine__process_lost_event(machine, event, sample);
1014 }
1015
1016 int perf_event__process_aux(struct perf_tool *tool __maybe_unused,
1017 union perf_event *event,
1018 struct perf_sample *sample __maybe_unused,
1019 struct machine *machine)
1020 {
1021 return machine__process_aux_event(machine, event);
1022 }
1023
1024 int perf_event__process_itrace_start(struct perf_tool *tool __maybe_unused,
1025 union perf_event *event,
1026 struct perf_sample *sample __maybe_unused,
1027 struct machine *machine)
1028 {
1029 return machine__process_itrace_start_event(machine, event);
1030 }
1031
1032 int perf_event__process_lost_samples(struct perf_tool *tool __maybe_unused,
1033 union perf_event *event,
1034 struct perf_sample *sample,
1035 struct machine *machine)
1036 {
1037 return machine__process_lost_samples_event(machine, event, sample);
1038 }
1039
1040 int perf_event__process_switch(struct perf_tool *tool __maybe_unused,
1041 union perf_event *event,
1042 struct perf_sample *sample __maybe_unused,
1043 struct machine *machine)
1044 {
1045 return machine__process_switch_event(machine, event);
1046 }
1047
1048 size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
1049 {
1050 return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %c %s\n",
1051 event->mmap.pid, event->mmap.tid, event->mmap.start,
1052 event->mmap.len, event->mmap.pgoff,
1053 (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x',
1054 event->mmap.filename);
1055 }
1056
1057 size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp)
1058 {
1059 return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64
1060 " %02x:%02x %"PRIu64" %"PRIu64"]: %c%c%c%c %s\n",
1061 event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
1062 event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj,
1063 event->mmap2.min, event->mmap2.ino,
1064 event->mmap2.ino_generation,
1065 (event->mmap2.prot & PROT_READ) ? 'r' : '-',
1066 (event->mmap2.prot & PROT_WRITE) ? 'w' : '-',
1067 (event->mmap2.prot & PROT_EXEC) ? 'x' : '-',
1068 (event->mmap2.flags & MAP_SHARED) ? 's' : 'p',
1069 event->mmap2.filename);
1070 }
1071
1072 size_t perf_event__fprintf_thread_map(union perf_event *event, FILE *fp)
1073 {
1074 struct thread_map *threads = thread_map__new_event(&event->thread_map);
1075 size_t ret;
1076
1077 ret = fprintf(fp, " nr: ");
1078
1079 if (threads)
1080 ret += thread_map__fprintf(threads, fp);
1081 else
1082 ret += fprintf(fp, "failed to get threads from event\n");
1083
1084 thread_map__put(threads);
1085 return ret;
1086 }
1087
1088 size_t perf_event__fprintf_cpu_map(union perf_event *event, FILE *fp)
1089 {
1090 struct cpu_map *cpus = cpu_map__new_data(&event->cpu_map.data);
1091 size_t ret;
1092
1093 ret = fprintf(fp, " nr: ");
1094
1095 if (cpus)
1096 ret += cpu_map__fprintf(cpus, fp);
1097 else
1098 ret += fprintf(fp, "failed to get cpumap from event\n");
1099
1100 cpu_map__put(cpus);
1101 return ret;
1102 }
1103
1104 int perf_event__process_mmap(struct perf_tool *tool __maybe_unused,
1105 union perf_event *event,
1106 struct perf_sample *sample,
1107 struct machine *machine)
1108 {
1109 return machine__process_mmap_event(machine, event, sample);
1110 }
1111
1112 int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused,
1113 union perf_event *event,
1114 struct perf_sample *sample,
1115 struct machine *machine)
1116 {
1117 return machine__process_mmap2_event(machine, event, sample);
1118 }
1119
1120 size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
1121 {
1122 return fprintf(fp, "(%d:%d):(%d:%d)\n",
1123 event->fork.pid, event->fork.tid,
1124 event->fork.ppid, event->fork.ptid);
1125 }
1126
1127 int perf_event__process_fork(struct perf_tool *tool __maybe_unused,
1128 union perf_event *event,
1129 struct perf_sample *sample,
1130 struct machine *machine)
1131 {
1132 return machine__process_fork_event(machine, event, sample);
1133 }
1134
1135 int perf_event__process_exit(struct perf_tool *tool __maybe_unused,
1136 union perf_event *event,
1137 struct perf_sample *sample,
1138 struct machine *machine)
1139 {
1140 return machine__process_exit_event(machine, event, sample);
1141 }
1142
1143 size_t perf_event__fprintf_aux(union perf_event *event, FILE *fp)
1144 {
1145 return fprintf(fp, " offset: %#"PRIx64" size: %#"PRIx64" flags: %#"PRIx64" [%s%s]\n",
1146 event->aux.aux_offset, event->aux.aux_size,
1147 event->aux.flags,
1148 event->aux.flags & PERF_AUX_FLAG_TRUNCATED ? "T" : "",
1149 event->aux.flags & PERF_AUX_FLAG_OVERWRITE ? "O" : "");
1150 }
1151
1152 size_t perf_event__fprintf_itrace_start(union perf_event *event, FILE *fp)
1153 {
1154 return fprintf(fp, " pid: %u tid: %u\n",
1155 event->itrace_start.pid, event->itrace_start.tid);
1156 }
1157
1158 size_t perf_event__fprintf_switch(union perf_event *event, FILE *fp)
1159 {
1160 bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT;
1161 const char *in_out = out ? "OUT" : "IN ";
1162
1163 if (event->header.type == PERF_RECORD_SWITCH)
1164 return fprintf(fp, " %s\n", in_out);
1165
1166 return fprintf(fp, " %s %s pid/tid: %5u/%-5u\n",
1167 in_out, out ? "next" : "prev",
1168 event->context_switch.next_prev_pid,
1169 event->context_switch.next_prev_tid);
1170 }
1171
1172 size_t perf_event__fprintf(union perf_event *event, FILE *fp)
1173 {
1174 size_t ret = fprintf(fp, "PERF_RECORD_%s",
1175 perf_event__name(event->header.type));
1176
1177 switch (event->header.type) {
1178 case PERF_RECORD_COMM:
1179 ret += perf_event__fprintf_comm(event, fp);
1180 break;
1181 case PERF_RECORD_FORK:
1182 case PERF_RECORD_EXIT:
1183 ret += perf_event__fprintf_task(event, fp);
1184 break;
1185 case PERF_RECORD_MMAP:
1186 ret += perf_event__fprintf_mmap(event, fp);
1187 break;
1188 case PERF_RECORD_MMAP2:
1189 ret += perf_event__fprintf_mmap2(event, fp);
1190 break;
1191 case PERF_RECORD_AUX:
1192 ret += perf_event__fprintf_aux(event, fp);
1193 break;
1194 case PERF_RECORD_ITRACE_START:
1195 ret += perf_event__fprintf_itrace_start(event, fp);
1196 break;
1197 case PERF_RECORD_SWITCH:
1198 case PERF_RECORD_SWITCH_CPU_WIDE:
1199 ret += perf_event__fprintf_switch(event, fp);
1200 break;
1201 default:
1202 ret += fprintf(fp, "\n");
1203 }
1204
1205 return ret;
1206 }
1207
1208 int perf_event__process(struct perf_tool *tool __maybe_unused,
1209 union perf_event *event,
1210 struct perf_sample *sample,
1211 struct machine *machine)
1212 {
1213 return machine__process_event(machine, event, sample);
1214 }
1215
1216 void thread__find_addr_map(struct thread *thread, u8 cpumode,
1217 enum map_type type, u64 addr,
1218 struct addr_location *al)
1219 {
1220 struct map_groups *mg = thread->mg;
1221 struct machine *machine = mg->machine;
1222 bool load_map = false;
1223
1224 al->machine = machine;
1225 al->thread = thread;
1226 al->addr = addr;
1227 al->cpumode = cpumode;
1228 al->filtered = 0;
1229
1230 if (machine == NULL) {
1231 al->map = NULL;
1232 return;
1233 }
1234
1235 if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
1236 al->level = 'k';
1237 mg = &machine->kmaps;
1238 load_map = true;
1239 } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
1240 al->level = '.';
1241 } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
1242 al->level = 'g';
1243 mg = &machine->kmaps;
1244 load_map = true;
1245 } else if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) {
1246 al->level = 'u';
1247 } else {
1248 al->level = 'H';
1249 al->map = NULL;
1250
1251 if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
1252 cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
1253 !perf_guest)
1254 al->filtered |= (1 << HIST_FILTER__GUEST);
1255 if ((cpumode == PERF_RECORD_MISC_USER ||
1256 cpumode == PERF_RECORD_MISC_KERNEL) &&
1257 !perf_host)
1258 al->filtered |= (1 << HIST_FILTER__HOST);
1259
1260 return;
1261 }
1262 try_again:
1263 al->map = map_groups__find(mg, type, al->addr);
1264 if (al->map == NULL) {
1265 /*
1266 * If this is outside of all known maps, and is a negative
1267 * address, try to look it up in the kernel dso, as it might be
1268 * a vsyscall or vdso (which executes in user-mode).
1269 *
1270 * XXX This is nasty, we should have a symbol list in the
1271 * "[vdso]" dso, but for now lets use the old trick of looking
1272 * in the whole kernel symbol list.
1273 */
1274 if (cpumode == PERF_RECORD_MISC_USER && machine &&
1275 mg != &machine->kmaps &&
1276 machine__kernel_ip(machine, al->addr)) {
1277 mg = &machine->kmaps;
1278 load_map = true;
1279 goto try_again;
1280 }
1281 } else {
1282 /*
1283 * Kernel maps might be changed when loading symbols so loading
1284 * must be done prior to using kernel maps.
1285 */
1286 if (load_map)
1287 map__load(al->map, machine->symbol_filter);
1288 al->addr = al->map->map_ip(al->map, al->addr);
1289 }
1290 }
1291
1292 void thread__find_addr_location(struct thread *thread,
1293 u8 cpumode, enum map_type type, u64 addr,
1294 struct addr_location *al)
1295 {
1296 thread__find_addr_map(thread, cpumode, type, addr, al);
1297 if (al->map != NULL)
1298 al->sym = map__find_symbol(al->map, al->addr,
1299 thread->mg->machine->symbol_filter);
1300 else
1301 al->sym = NULL;
1302 }
1303
1304 /*
1305 * Callers need to drop the reference to al->thread, obtained in
1306 * machine__findnew_thread()
1307 */
1308 int machine__resolve(struct machine *machine, struct addr_location *al,
1309 struct perf_sample *sample)
1310 {
1311 struct thread *thread = machine__findnew_thread(machine, sample->pid,
1312 sample->tid);
1313
1314 if (thread == NULL)
1315 return -1;
1316
1317 dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
1318 /*
1319 * Have we already created the kernel maps for this machine?
1320 *
1321 * This should have happened earlier, when we processed the kernel MMAP
1322 * events, but for older perf.data files there was no such thing, so do
1323 * it now.
1324 */
1325 if (sample->cpumode == PERF_RECORD_MISC_KERNEL &&
1326 machine__kernel_map(machine) == NULL)
1327 machine__create_kernel_maps(machine);
1328
1329 thread__find_addr_map(thread, sample->cpumode, MAP__FUNCTION, sample->ip, al);
1330 dump_printf(" ...... dso: %s\n",
1331 al->map ? al->map->dso->long_name :
1332 al->level == 'H' ? "[hypervisor]" : "<not found>");
1333
1334 if (thread__is_filtered(thread))
1335 al->filtered |= (1 << HIST_FILTER__THREAD);
1336
1337 al->sym = NULL;
1338 al->cpu = sample->cpu;
1339 al->socket = -1;
1340
1341 if (al->cpu >= 0) {
1342 struct perf_env *env = machine->env;
1343
1344 if (env && env->cpu)
1345 al->socket = env->cpu[al->cpu].socket_id;
1346 }
1347
1348 if (al->map) {
1349 struct dso *dso = al->map->dso;
1350
1351 if (symbol_conf.dso_list &&
1352 (!dso || !(strlist__has_entry(symbol_conf.dso_list,
1353 dso->short_name) ||
1354 (dso->short_name != dso->long_name &&
1355 strlist__has_entry(symbol_conf.dso_list,
1356 dso->long_name))))) {
1357 al->filtered |= (1 << HIST_FILTER__DSO);
1358 }
1359
1360 al->sym = map__find_symbol(al->map, al->addr,
1361 machine->symbol_filter);
1362 }
1363
1364 if (symbol_conf.sym_list &&
1365 (!al->sym || !strlist__has_entry(symbol_conf.sym_list,
1366 al->sym->name))) {
1367 al->filtered |= (1 << HIST_FILTER__SYMBOL);
1368 }
1369
1370 return 0;
1371 }
1372
1373 /*
1374 * The preprocess_sample method will return with reference counts for the
1375 * in it, when done using (and perhaps getting ref counts if needing to
1376 * keep a pointer to one of those entries) it must be paired with
1377 * addr_location__put(), so that the refcounts can be decremented.
1378 */
1379 void addr_location__put(struct addr_location *al)
1380 {
1381 thread__zput(al->thread);
1382 }
1383
1384 bool is_bts_event(struct perf_event_attr *attr)
1385 {
1386 return attr->type == PERF_TYPE_HARDWARE &&
1387 (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) &&
1388 attr->sample_period == 1;
1389 }
1390
1391 bool sample_addr_correlates_sym(struct perf_event_attr *attr)
1392 {
1393 if (attr->type == PERF_TYPE_SOFTWARE &&
1394 (attr->config == PERF_COUNT_SW_PAGE_FAULTS ||
1395 attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
1396 attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ))
1397 return true;
1398
1399 if (is_bts_event(attr))
1400 return true;
1401
1402 return false;
1403 }
1404
1405 void thread__resolve(struct thread *thread, struct addr_location *al,
1406 struct perf_sample *sample)
1407 {
1408 thread__find_addr_map(thread, sample->cpumode, MAP__FUNCTION, sample->addr, al);
1409 if (!al->map)
1410 thread__find_addr_map(thread, sample->cpumode, MAP__VARIABLE,
1411 sample->addr, al);
1412
1413 al->cpu = sample->cpu;
1414 al->sym = NULL;
1415
1416 if (al->map)
1417 al->sym = map__find_symbol(al->map, al->addr, NULL);
1418 }
Ubuntu Hirsute Linux kernel mirror