xref: /openbmc/linux/tools/perf/util/event.c (revision 94c7b6fc)
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 
14 static const char *perf_event__names[] = {
15 	[0]					= "TOTAL",
16 	[PERF_RECORD_MMAP]			= "MMAP",
17 	[PERF_RECORD_MMAP2]			= "MMAP2",
18 	[PERF_RECORD_LOST]			= "LOST",
19 	[PERF_RECORD_COMM]			= "COMM",
20 	[PERF_RECORD_EXIT]			= "EXIT",
21 	[PERF_RECORD_THROTTLE]			= "THROTTLE",
22 	[PERF_RECORD_UNTHROTTLE]		= "UNTHROTTLE",
23 	[PERF_RECORD_FORK]			= "FORK",
24 	[PERF_RECORD_READ]			= "READ",
25 	[PERF_RECORD_SAMPLE]			= "SAMPLE",
26 	[PERF_RECORD_HEADER_ATTR]		= "ATTR",
27 	[PERF_RECORD_HEADER_EVENT_TYPE]		= "EVENT_TYPE",
28 	[PERF_RECORD_HEADER_TRACING_DATA]	= "TRACING_DATA",
29 	[PERF_RECORD_HEADER_BUILD_ID]		= "BUILD_ID",
30 	[PERF_RECORD_FINISHED_ROUND]		= "FINISHED_ROUND",
31 };
32 
33 const char *perf_event__name(unsigned int id)
34 {
35 	if (id >= ARRAY_SIZE(perf_event__names))
36 		return "INVALID";
37 	if (!perf_event__names[id])
38 		return "UNKNOWN";
39 	return perf_event__names[id];
40 }
41 
42 static struct perf_sample synth_sample = {
43 	.pid	   = -1,
44 	.tid	   = -1,
45 	.time	   = -1,
46 	.stream_id = -1,
47 	.cpu	   = -1,
48 	.period	   = 1,
49 };
50 
51 static pid_t perf_event__get_comm_tgid(pid_t pid, char *comm, size_t len)
52 {
53 	char filename[PATH_MAX];
54 	char bf[BUFSIZ];
55 	FILE *fp;
56 	size_t size = 0;
57 	pid_t tgid = -1;
58 
59 	snprintf(filename, sizeof(filename), "/proc/%d/status", pid);
60 
61 	fp = fopen(filename, "r");
62 	if (fp == NULL) {
63 		pr_debug("couldn't open %s\n", filename);
64 		return 0;
65 	}
66 
67 	while (!comm[0] || (tgid < 0)) {
68 		if (fgets(bf, sizeof(bf), fp) == NULL) {
69 			pr_warning("couldn't get COMM and pgid, malformed %s\n",
70 				   filename);
71 			break;
72 		}
73 
74 		if (memcmp(bf, "Name:", 5) == 0) {
75 			char *name = bf + 5;
76 			while (*name && isspace(*name))
77 				++name;
78 			size = strlen(name) - 1;
79 			if (size >= len)
80 				size = len - 1;
81 			memcpy(comm, name, size);
82 			comm[size] = '\0';
83 
84 		} else if (memcmp(bf, "Tgid:", 5) == 0) {
85 			char *tgids = bf + 5;
86 			while (*tgids && isspace(*tgids))
87 				++tgids;
88 			tgid = atoi(tgids);
89 		}
90 	}
91 
92 	fclose(fp);
93 
94 	return tgid;
95 }
96 
97 static pid_t perf_event__synthesize_comm(struct perf_tool *tool,
98 					 union perf_event *event, pid_t pid,
99 					 perf_event__handler_t process,
100 					 struct machine *machine)
101 {
102 	size_t size;
103 	pid_t tgid;
104 
105 	memset(&event->comm, 0, sizeof(event->comm));
106 
107 	if (machine__is_host(machine))
108 		tgid = perf_event__get_comm_tgid(pid, event->comm.comm,
109 						 sizeof(event->comm.comm));
110 	else
111 		tgid = machine->pid;
112 
113 	if (tgid < 0)
114 		goto out;
115 
116 	event->comm.pid = tgid;
117 	event->comm.header.type = PERF_RECORD_COMM;
118 
119 	size = strlen(event->comm.comm) + 1;
120 	size = PERF_ALIGN(size, sizeof(u64));
121 	memset(event->comm.comm + size, 0, machine->id_hdr_size);
122 	event->comm.header.size = (sizeof(event->comm) -
123 				(sizeof(event->comm.comm) - size) +
124 				machine->id_hdr_size);
125 	event->comm.tid = pid;
126 
127 	if (process(tool, event, &synth_sample, machine) != 0)
128 		return -1;
129 
130 out:
131 	return tgid;
132 }
133 
134 static int perf_event__synthesize_fork(struct perf_tool *tool,
135 				       union perf_event *event, pid_t pid,
136 				       pid_t tgid, perf_event__handler_t process,
137 				       struct machine *machine)
138 {
139 	memset(&event->fork, 0, sizeof(event->fork) + machine->id_hdr_size);
140 
141 	/* this is really a clone event but we use fork to synthesize it */
142 	event->fork.ppid = tgid;
143 	event->fork.ptid = tgid;
144 	event->fork.pid  = tgid;
145 	event->fork.tid  = pid;
146 	event->fork.header.type = PERF_RECORD_FORK;
147 
148 	event->fork.header.size = (sizeof(event->fork) + machine->id_hdr_size);
149 
150 	if (process(tool, event, &synth_sample, machine) != 0)
151 		return -1;
152 
153 	return 0;
154 }
155 
156 int perf_event__synthesize_mmap_events(struct perf_tool *tool,
157 				       union perf_event *event,
158 				       pid_t pid, pid_t tgid,
159 				       perf_event__handler_t process,
160 				       struct machine *machine,
161 				       bool mmap_data)
162 {
163 	char filename[PATH_MAX];
164 	FILE *fp;
165 	int rc = 0;
166 
167 	if (machine__is_default_guest(machine))
168 		return 0;
169 
170 	snprintf(filename, sizeof(filename), "%s/proc/%d/maps",
171 		 machine->root_dir, pid);
172 
173 	fp = fopen(filename, "r");
174 	if (fp == NULL) {
175 		/*
176 		 * We raced with a task exiting - just return:
177 		 */
178 		pr_debug("couldn't open %s\n", filename);
179 		return -1;
180 	}
181 
182 	event->header.type = PERF_RECORD_MMAP2;
183 
184 	while (1) {
185 		char bf[BUFSIZ];
186 		char prot[5];
187 		char execname[PATH_MAX];
188 		char anonstr[] = "//anon";
189 		unsigned int ino;
190 		size_t size;
191 		ssize_t n;
192 
193 		if (fgets(bf, sizeof(bf), fp) == NULL)
194 			break;
195 
196 		/* ensure null termination since stack will be reused. */
197 		strcpy(execname, "");
198 
199 		/* 00400000-0040c000 r-xp 00000000 fd:01 41038  /bin/cat */
200 		n = sscanf(bf, "%"PRIx64"-%"PRIx64" %s %"PRIx64" %x:%x %u %s\n",
201 		       &event->mmap2.start, &event->mmap2.len, prot,
202 		       &event->mmap2.pgoff, &event->mmap2.maj,
203 		       &event->mmap2.min,
204 		       &ino, execname);
205 
206 		/*
207  		 * Anon maps don't have the execname.
208  		 */
209 		if (n < 7)
210 			continue;
211 
212 		event->mmap2.ino = (u64)ino;
213 
214 		/*
215 		 * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
216 		 */
217 		if (machine__is_host(machine))
218 			event->header.misc = PERF_RECORD_MISC_USER;
219 		else
220 			event->header.misc = PERF_RECORD_MISC_GUEST_USER;
221 
222 		/* map protection and flags bits */
223 		event->mmap2.prot = 0;
224 		event->mmap2.flags = 0;
225 		if (prot[0] == 'r')
226 			event->mmap2.prot |= PROT_READ;
227 		if (prot[1] == 'w')
228 			event->mmap2.prot |= PROT_WRITE;
229 		if (prot[2] == 'x')
230 			event->mmap2.prot |= PROT_EXEC;
231 
232 		if (prot[3] == 's')
233 			event->mmap2.flags |= MAP_SHARED;
234 		else
235 			event->mmap2.flags |= MAP_PRIVATE;
236 
237 		if (prot[2] != 'x') {
238 			if (!mmap_data || prot[0] != 'r')
239 				continue;
240 
241 			event->header.misc |= PERF_RECORD_MISC_MMAP_DATA;
242 		}
243 
244 		if (!strcmp(execname, ""))
245 			strcpy(execname, anonstr);
246 
247 		size = strlen(execname) + 1;
248 		memcpy(event->mmap2.filename, execname, size);
249 		size = PERF_ALIGN(size, sizeof(u64));
250 		event->mmap2.len -= event->mmap.start;
251 		event->mmap2.header.size = (sizeof(event->mmap2) -
252 					(sizeof(event->mmap2.filename) - size));
253 		memset(event->mmap2.filename + size, 0, machine->id_hdr_size);
254 		event->mmap2.header.size += machine->id_hdr_size;
255 		event->mmap2.pid = tgid;
256 		event->mmap2.tid = pid;
257 
258 		if (process(tool, event, &synth_sample, machine) != 0) {
259 			rc = -1;
260 			break;
261 		}
262 	}
263 
264 	fclose(fp);
265 	return rc;
266 }
267 
268 int perf_event__synthesize_modules(struct perf_tool *tool,
269 				   perf_event__handler_t process,
270 				   struct machine *machine)
271 {
272 	int rc = 0;
273 	struct rb_node *nd;
274 	struct map_groups *kmaps = &machine->kmaps;
275 	union perf_event *event = zalloc((sizeof(event->mmap) +
276 					  machine->id_hdr_size));
277 	if (event == NULL) {
278 		pr_debug("Not enough memory synthesizing mmap event "
279 			 "for kernel modules\n");
280 		return -1;
281 	}
282 
283 	event->header.type = PERF_RECORD_MMAP;
284 
285 	/*
286 	 * kernel uses 0 for user space maps, see kernel/perf_event.c
287 	 * __perf_event_mmap
288 	 */
289 	if (machine__is_host(machine))
290 		event->header.misc = PERF_RECORD_MISC_KERNEL;
291 	else
292 		event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
293 
294 	for (nd = rb_first(&kmaps->maps[MAP__FUNCTION]);
295 	     nd; nd = rb_next(nd)) {
296 		size_t size;
297 		struct map *pos = rb_entry(nd, struct map, rb_node);
298 
299 		if (pos->dso->kernel)
300 			continue;
301 
302 		size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
303 		event->mmap.header.type = PERF_RECORD_MMAP;
304 		event->mmap.header.size = (sizeof(event->mmap) -
305 				        (sizeof(event->mmap.filename) - size));
306 		memset(event->mmap.filename + size, 0, machine->id_hdr_size);
307 		event->mmap.header.size += machine->id_hdr_size;
308 		event->mmap.start = pos->start;
309 		event->mmap.len   = pos->end - pos->start;
310 		event->mmap.pid   = machine->pid;
311 
312 		memcpy(event->mmap.filename, pos->dso->long_name,
313 		       pos->dso->long_name_len + 1);
314 		if (process(tool, event, &synth_sample, machine) != 0) {
315 			rc = -1;
316 			break;
317 		}
318 	}
319 
320 	free(event);
321 	return rc;
322 }
323 
324 static int __event__synthesize_thread(union perf_event *comm_event,
325 				      union perf_event *mmap_event,
326 				      union perf_event *fork_event,
327 				      pid_t pid, int full,
328 					  perf_event__handler_t process,
329 				      struct perf_tool *tool,
330 				      struct machine *machine, bool mmap_data)
331 {
332 	char filename[PATH_MAX];
333 	DIR *tasks;
334 	struct dirent dirent, *next;
335 	pid_t tgid;
336 
337 	/* special case: only send one comm event using passed in pid */
338 	if (!full) {
339 		tgid = perf_event__synthesize_comm(tool, comm_event, pid,
340 						   process, machine);
341 
342 		if (tgid == -1)
343 			return -1;
344 
345 		return perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
346 							  process, machine, mmap_data);
347 	}
348 
349 	if (machine__is_default_guest(machine))
350 		return 0;
351 
352 	snprintf(filename, sizeof(filename), "%s/proc/%d/task",
353 		 machine->root_dir, pid);
354 
355 	tasks = opendir(filename);
356 	if (tasks == NULL) {
357 		pr_debug("couldn't open %s\n", filename);
358 		return 0;
359 	}
360 
361 	while (!readdir_r(tasks, &dirent, &next) && next) {
362 		char *end;
363 		int rc = 0;
364 		pid_t _pid;
365 
366 		_pid = strtol(dirent.d_name, &end, 10);
367 		if (*end)
368 			continue;
369 
370 		tgid = perf_event__synthesize_comm(tool, comm_event, _pid,
371 						   process, machine);
372 		if (tgid == -1)
373 			return -1;
374 
375 		if (_pid == pid) {
376 			/* process the parent's maps too */
377 			rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
378 						process, machine, mmap_data);
379 		} else {
380 			/* only fork the tid's map, to save time */
381 			rc = perf_event__synthesize_fork(tool, fork_event, _pid, tgid,
382 						 process, machine);
383 		}
384 
385 		if (rc)
386 			return rc;
387 	}
388 
389 	closedir(tasks);
390 	return 0;
391 }
392 
393 int perf_event__synthesize_thread_map(struct perf_tool *tool,
394 				      struct thread_map *threads,
395 				      perf_event__handler_t process,
396 				      struct machine *machine,
397 				      bool mmap_data)
398 {
399 	union perf_event *comm_event, *mmap_event, *fork_event;
400 	int err = -1, thread, j;
401 
402 	comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
403 	if (comm_event == NULL)
404 		goto out;
405 
406 	mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size);
407 	if (mmap_event == NULL)
408 		goto out_free_comm;
409 
410 	fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
411 	if (fork_event == NULL)
412 		goto out_free_mmap;
413 
414 	err = 0;
415 	for (thread = 0; thread < threads->nr; ++thread) {
416 		if (__event__synthesize_thread(comm_event, mmap_event,
417 					       fork_event,
418 					       threads->map[thread], 0,
419 					       process, tool, machine,
420 					       mmap_data)) {
421 			err = -1;
422 			break;
423 		}
424 
425 		/*
426 		 * comm.pid is set to thread group id by
427 		 * perf_event__synthesize_comm
428 		 */
429 		if ((int) comm_event->comm.pid != threads->map[thread]) {
430 			bool need_leader = true;
431 
432 			/* is thread group leader in thread_map? */
433 			for (j = 0; j < threads->nr; ++j) {
434 				if ((int) comm_event->comm.pid == threads->map[j]) {
435 					need_leader = false;
436 					break;
437 				}
438 			}
439 
440 			/* if not, generate events for it */
441 			if (need_leader &&
442 			    __event__synthesize_thread(comm_event, mmap_event,
443 						       fork_event,
444 						       comm_event->comm.pid, 0,
445 						       process, tool, machine,
446 						       mmap_data)) {
447 				err = -1;
448 				break;
449 			}
450 		}
451 	}
452 	free(fork_event);
453 out_free_mmap:
454 	free(mmap_event);
455 out_free_comm:
456 	free(comm_event);
457 out:
458 	return err;
459 }
460 
461 int perf_event__synthesize_threads(struct perf_tool *tool,
462 				   perf_event__handler_t process,
463 				   struct machine *machine, bool mmap_data)
464 {
465 	DIR *proc;
466 	char proc_path[PATH_MAX];
467 	struct dirent dirent, *next;
468 	union perf_event *comm_event, *mmap_event, *fork_event;
469 	int err = -1;
470 
471 	if (machine__is_default_guest(machine))
472 		return 0;
473 
474 	comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
475 	if (comm_event == NULL)
476 		goto out;
477 
478 	mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size);
479 	if (mmap_event == NULL)
480 		goto out_free_comm;
481 
482 	fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
483 	if (fork_event == NULL)
484 		goto out_free_mmap;
485 
486 	snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir);
487 	proc = opendir(proc_path);
488 
489 	if (proc == NULL)
490 		goto out_free_fork;
491 
492 	while (!readdir_r(proc, &dirent, &next) && next) {
493 		char *end;
494 		pid_t pid = strtol(dirent.d_name, &end, 10);
495 
496 		if (*end) /* only interested in proper numerical dirents */
497 			continue;
498 		/*
499  		 * We may race with exiting thread, so don't stop just because
500  		 * one thread couldn't be synthesized.
501  		 */
502 		__event__synthesize_thread(comm_event, mmap_event, fork_event, pid,
503 					   1, process, tool, machine, mmap_data);
504 	}
505 
506 	err = 0;
507 	closedir(proc);
508 out_free_fork:
509 	free(fork_event);
510 out_free_mmap:
511 	free(mmap_event);
512 out_free_comm:
513 	free(comm_event);
514 out:
515 	return err;
516 }
517 
518 struct process_symbol_args {
519 	const char *name;
520 	u64	   start;
521 };
522 
523 static int find_symbol_cb(void *arg, const char *name, char type,
524 			  u64 start)
525 {
526 	struct process_symbol_args *args = arg;
527 
528 	/*
529 	 * Must be a function or at least an alias, as in PARISC64, where "_text" is
530 	 * an 'A' to the same address as "_stext".
531 	 */
532 	if (!(symbol_type__is_a(type, MAP__FUNCTION) ||
533 	      type == 'A') || strcmp(name, args->name))
534 		return 0;
535 
536 	args->start = start;
537 	return 1;
538 }
539 
540 u64 kallsyms__get_function_start(const char *kallsyms_filename,
541 				 const char *symbol_name)
542 {
543 	struct process_symbol_args args = { .name = symbol_name, };
544 
545 	if (kallsyms__parse(kallsyms_filename, &args, find_symbol_cb) <= 0)
546 		return 0;
547 
548 	return args.start;
549 }
550 
551 int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
552 				       perf_event__handler_t process,
553 				       struct machine *machine)
554 {
555 	size_t size;
556 	const char *mmap_name;
557 	char name_buff[PATH_MAX];
558 	struct map *map;
559 	struct kmap *kmap;
560 	int err;
561 	/*
562 	 * We should get this from /sys/kernel/sections/.text, but till that is
563 	 * available use this, and after it is use this as a fallback for older
564 	 * kernels.
565 	 */
566 	union perf_event *event = zalloc((sizeof(event->mmap) +
567 					  machine->id_hdr_size));
568 	if (event == NULL) {
569 		pr_debug("Not enough memory synthesizing mmap event "
570 			 "for kernel modules\n");
571 		return -1;
572 	}
573 
574 	mmap_name = machine__mmap_name(machine, name_buff, sizeof(name_buff));
575 	if (machine__is_host(machine)) {
576 		/*
577 		 * kernel uses PERF_RECORD_MISC_USER for user space maps,
578 		 * see kernel/perf_event.c __perf_event_mmap
579 		 */
580 		event->header.misc = PERF_RECORD_MISC_KERNEL;
581 	} else {
582 		event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
583 	}
584 
585 	map = machine->vmlinux_maps[MAP__FUNCTION];
586 	kmap = map__kmap(map);
587 	size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
588 			"%s%s", mmap_name, kmap->ref_reloc_sym->name) + 1;
589 	size = PERF_ALIGN(size, sizeof(u64));
590 	event->mmap.header.type = PERF_RECORD_MMAP;
591 	event->mmap.header.size = (sizeof(event->mmap) -
592 			(sizeof(event->mmap.filename) - size) + machine->id_hdr_size);
593 	event->mmap.pgoff = kmap->ref_reloc_sym->addr;
594 	event->mmap.start = map->start;
595 	event->mmap.len   = map->end - event->mmap.start;
596 	event->mmap.pid   = machine->pid;
597 
598 	err = process(tool, event, &synth_sample, machine);
599 	free(event);
600 
601 	return err;
602 }
603 
604 size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
605 {
606 	return fprintf(fp, ": %s:%d\n", event->comm.comm, event->comm.tid);
607 }
608 
609 int perf_event__process_comm(struct perf_tool *tool __maybe_unused,
610 			     union perf_event *event,
611 			     struct perf_sample *sample,
612 			     struct machine *machine)
613 {
614 	return machine__process_comm_event(machine, event, sample);
615 }
616 
617 int perf_event__process_lost(struct perf_tool *tool __maybe_unused,
618 			     union perf_event *event,
619 			     struct perf_sample *sample,
620 			     struct machine *machine)
621 {
622 	return machine__process_lost_event(machine, event, sample);
623 }
624 
625 size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
626 {
627 	return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %c %s\n",
628 		       event->mmap.pid, event->mmap.tid, event->mmap.start,
629 		       event->mmap.len, event->mmap.pgoff,
630 		       (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x',
631 		       event->mmap.filename);
632 }
633 
634 size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp)
635 {
636 	return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64
637 			   " %02x:%02x %"PRIu64" %"PRIu64"]: %c%c%c%c %s\n",
638 		       event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
639 		       event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj,
640 		       event->mmap2.min, event->mmap2.ino,
641 		       event->mmap2.ino_generation,
642 		       (event->mmap2.prot & PROT_READ) ? 'r' : '-',
643 		       (event->mmap2.prot & PROT_WRITE) ? 'w' : '-',
644 		       (event->mmap2.prot & PROT_EXEC) ? 'x' : '-',
645 		       (event->mmap2.flags & MAP_SHARED) ? 's' : 'p',
646 		       event->mmap2.filename);
647 }
648 
649 int perf_event__process_mmap(struct perf_tool *tool __maybe_unused,
650 			     union perf_event *event,
651 			     struct perf_sample *sample,
652 			     struct machine *machine)
653 {
654 	return machine__process_mmap_event(machine, event, sample);
655 }
656 
657 int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused,
658 			     union perf_event *event,
659 			     struct perf_sample *sample,
660 			     struct machine *machine)
661 {
662 	return machine__process_mmap2_event(machine, event, sample);
663 }
664 
665 size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
666 {
667 	return fprintf(fp, "(%d:%d):(%d:%d)\n",
668 		       event->fork.pid, event->fork.tid,
669 		       event->fork.ppid, event->fork.ptid);
670 }
671 
672 int perf_event__process_fork(struct perf_tool *tool __maybe_unused,
673 			     union perf_event *event,
674 			     struct perf_sample *sample,
675 			     struct machine *machine)
676 {
677 	return machine__process_fork_event(machine, event, sample);
678 }
679 
680 int perf_event__process_exit(struct perf_tool *tool __maybe_unused,
681 			     union perf_event *event,
682 			     struct perf_sample *sample,
683 			     struct machine *machine)
684 {
685 	return machine__process_exit_event(machine, event, sample);
686 }
687 
688 size_t perf_event__fprintf(union perf_event *event, FILE *fp)
689 {
690 	size_t ret = fprintf(fp, "PERF_RECORD_%s",
691 			     perf_event__name(event->header.type));
692 
693 	switch (event->header.type) {
694 	case PERF_RECORD_COMM:
695 		ret += perf_event__fprintf_comm(event, fp);
696 		break;
697 	case PERF_RECORD_FORK:
698 	case PERF_RECORD_EXIT:
699 		ret += perf_event__fprintf_task(event, fp);
700 		break;
701 	case PERF_RECORD_MMAP:
702 		ret += perf_event__fprintf_mmap(event, fp);
703 		break;
704 	case PERF_RECORD_MMAP2:
705 		ret += perf_event__fprintf_mmap2(event, fp);
706 		break;
707 	default:
708 		ret += fprintf(fp, "\n");
709 	}
710 
711 	return ret;
712 }
713 
714 int perf_event__process(struct perf_tool *tool __maybe_unused,
715 			union perf_event *event,
716 			struct perf_sample *sample,
717 			struct machine *machine)
718 {
719 	return machine__process_event(machine, event, sample);
720 }
721 
722 void thread__find_addr_map(struct thread *thread,
723 			   struct machine *machine, u8 cpumode,
724 			   enum map_type type, u64 addr,
725 			   struct addr_location *al)
726 {
727 	struct map_groups *mg = thread->mg;
728 	bool load_map = false;
729 
730 	al->machine = machine;
731 	al->thread = thread;
732 	al->addr = addr;
733 	al->cpumode = cpumode;
734 	al->filtered = 0;
735 
736 	if (machine == NULL) {
737 		al->map = NULL;
738 		return;
739 	}
740 
741 	if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
742 		al->level = 'k';
743 		mg = &machine->kmaps;
744 		load_map = true;
745 	} else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
746 		al->level = '.';
747 	} else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
748 		al->level = 'g';
749 		mg = &machine->kmaps;
750 		load_map = true;
751 	} else if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) {
752 		al->level = 'u';
753 	} else {
754 		al->level = 'H';
755 		al->map = NULL;
756 
757 		if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
758 			cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
759 			!perf_guest)
760 			al->filtered |= (1 << HIST_FILTER__GUEST);
761 		if ((cpumode == PERF_RECORD_MISC_USER ||
762 			cpumode == PERF_RECORD_MISC_KERNEL) &&
763 			!perf_host)
764 			al->filtered |= (1 << HIST_FILTER__HOST);
765 
766 		return;
767 	}
768 try_again:
769 	al->map = map_groups__find(mg, type, al->addr);
770 	if (al->map == NULL) {
771 		/*
772 		 * If this is outside of all known maps, and is a negative
773 		 * address, try to look it up in the kernel dso, as it might be
774 		 * a vsyscall or vdso (which executes in user-mode).
775 		 *
776 		 * XXX This is nasty, we should have a symbol list in the
777 		 * "[vdso]" dso, but for now lets use the old trick of looking
778 		 * in the whole kernel symbol list.
779 		 */
780 		if ((long long)al->addr < 0 &&
781 		    cpumode == PERF_RECORD_MISC_USER &&
782 		    machine && mg != &machine->kmaps) {
783 			mg = &machine->kmaps;
784 			goto try_again;
785 		}
786 	} else {
787 		/*
788 		 * Kernel maps might be changed when loading symbols so loading
789 		 * must be done prior to using kernel maps.
790 		 */
791 		if (load_map)
792 			map__load(al->map, machine->symbol_filter);
793 		al->addr = al->map->map_ip(al->map, al->addr);
794 	}
795 }
796 
797 void thread__find_addr_location(struct thread *thread, struct machine *machine,
798 				u8 cpumode, enum map_type type, u64 addr,
799 				struct addr_location *al)
800 {
801 	thread__find_addr_map(thread, machine, cpumode, type, addr, al);
802 	if (al->map != NULL)
803 		al->sym = map__find_symbol(al->map, al->addr,
804 					   machine->symbol_filter);
805 	else
806 		al->sym = NULL;
807 }
808 
809 int perf_event__preprocess_sample(const union perf_event *event,
810 				  struct machine *machine,
811 				  struct addr_location *al,
812 				  struct perf_sample *sample)
813 {
814 	u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
815 	struct thread *thread = machine__findnew_thread(machine, sample->pid,
816 							sample->tid);
817 
818 	if (thread == NULL)
819 		return -1;
820 
821 	dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
822 	/*
823 	 * Have we already created the kernel maps for this machine?
824 	 *
825 	 * This should have happened earlier, when we processed the kernel MMAP
826 	 * events, but for older perf.data files there was no such thing, so do
827 	 * it now.
828 	 */
829 	if (cpumode == PERF_RECORD_MISC_KERNEL &&
830 	    machine->vmlinux_maps[MAP__FUNCTION] == NULL)
831 		machine__create_kernel_maps(machine);
832 
833 	thread__find_addr_map(thread, machine, cpumode, MAP__FUNCTION,
834 			      sample->ip, al);
835 	dump_printf(" ...... dso: %s\n",
836 		    al->map ? al->map->dso->long_name :
837 			al->level == 'H' ? "[hypervisor]" : "<not found>");
838 
839 	if (thread__is_filtered(thread))
840 		al->filtered |= (1 << HIST_FILTER__THREAD);
841 
842 	al->sym = NULL;
843 	al->cpu = sample->cpu;
844 
845 	if (al->map) {
846 		struct dso *dso = al->map->dso;
847 
848 		if (symbol_conf.dso_list &&
849 		    (!dso || !(strlist__has_entry(symbol_conf.dso_list,
850 						  dso->short_name) ||
851 			       (dso->short_name != dso->long_name &&
852 				strlist__has_entry(symbol_conf.dso_list,
853 						   dso->long_name))))) {
854 			al->filtered |= (1 << HIST_FILTER__DSO);
855 		}
856 
857 		al->sym = map__find_symbol(al->map, al->addr,
858 					   machine->symbol_filter);
859 	}
860 
861 	if (symbol_conf.sym_list &&
862 		(!al->sym || !strlist__has_entry(symbol_conf.sym_list,
863 						al->sym->name))) {
864 		al->filtered |= (1 << HIST_FILTER__SYMBOL);
865 	}
866 
867 	return 0;
868 }
869