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1#include <linux/types.h>
2#include "event.h"
3#include "debug.h"
4#include "session.h"
5#include "sort.h"
6#include "string.h"
7#include "strlist.h"
8#include "thread.h"
9#include "thread_map.h"
10
11static const char *perf_event__names[] = {
12 [0] = "TOTAL",
13 [PERF_RECORD_MMAP] = "MMAP",
14 [PERF_RECORD_LOST] = "LOST",
15 [PERF_RECORD_COMM] = "COMM",
16 [PERF_RECORD_EXIT] = "EXIT",
17 [PERF_RECORD_THROTTLE] = "THROTTLE",
18 [PERF_RECORD_UNTHROTTLE] = "UNTHROTTLE",
19 [PERF_RECORD_FORK] = "FORK",
20 [PERF_RECORD_READ] = "READ",
21 [PERF_RECORD_SAMPLE] = "SAMPLE",
22 [PERF_RECORD_HEADER_ATTR] = "ATTR",
23 [PERF_RECORD_HEADER_EVENT_TYPE] = "EVENT_TYPE",
24 [PERF_RECORD_HEADER_TRACING_DATA] = "TRACING_DATA",
25 [PERF_RECORD_HEADER_BUILD_ID] = "BUILD_ID",
26 [PERF_RECORD_FINISHED_ROUND] = "FINISHED_ROUND",
27};
28
29const char *perf_event__name(unsigned int id)
30{
31 if (id >= ARRAY_SIZE(perf_event__names))
32 return "INVALID";
33 if (!perf_event__names[id])
34 return "UNKNOWN";
35 return perf_event__names[id];
36}
37
38static struct perf_sample synth_sample = {
39 .pid = -1,
40 .tid = -1,
41 .time = -1,
42 .stream_id = -1,
43 .cpu = -1,
44 .period = 1,
45};
46
47static pid_t perf_event__synthesize_comm(union perf_event *event, pid_t pid,
48 int full, perf_event__handler_t process,
49 struct perf_session *session)
50{
51 char filename[PATH_MAX];
52 char bf[BUFSIZ];
53 FILE *fp;
54 size_t size = 0;
55 DIR *tasks;
56 struct dirent dirent, *next;
57 pid_t tgid = 0;
58
59 snprintf(filename, sizeof(filename), "/proc/%d/status", pid);
60
61 fp = fopen(filename, "r");
62 if (fp == NULL) {
63out_race:
64 /*
65 * We raced with a task exiting - just return:
66 */
67 pr_debug("couldn't open %s\n", filename);
68 return 0;
69 }
70
71 memset(&event->comm, 0, sizeof(event->comm));
72
73 while (!event->comm.comm[0] || !event->comm.pid) {
74 if (fgets(bf, sizeof(bf), fp) == NULL) {
75 pr_warning("couldn't get COMM and pgid, malformed %s\n", filename);
76 goto out;
77 }
78
79 if (memcmp(bf, "Name:", 5) == 0) {
80 char *name = bf + 5;
81 while (*name && isspace(*name))
82 ++name;
83 size = strlen(name) - 1;
84 memcpy(event->comm.comm, name, size++);
85 } else if (memcmp(bf, "Tgid:", 5) == 0) {
86 char *tgids = bf + 5;
87 while (*tgids && isspace(*tgids))
88 ++tgids;
89 tgid = event->comm.pid = atoi(tgids);
90 }
91 }
92
93 event->comm.header.type = PERF_RECORD_COMM;
94 size = ALIGN(size, sizeof(u64));
95 memset(event->comm.comm + size, 0, session->id_hdr_size);
96 event->comm.header.size = (sizeof(event->comm) -
97 (sizeof(event->comm.comm) - size) +
98 session->id_hdr_size);
99 if (!full) {
100 event->comm.tid = pid;
101
102 process(event, &synth_sample, session);
103 goto out;
104 }
105
106 snprintf(filename, sizeof(filename), "/proc/%d/task", pid);
107
108 tasks = opendir(filename);
109 if (tasks == NULL)
110 goto out_race;
111
112 while (!readdir_r(tasks, &dirent, &next) && next) {
113 char *end;
114 pid = strtol(dirent.d_name, &end, 10);
115 if (*end)
116 continue;
117
118 event->comm.tid = pid;
119
120 process(event, &synth_sample, session);
121 }
122
123 closedir(tasks);
124out:
125 fclose(fp);
126
127 return tgid;
128}
129
130static int perf_event__synthesize_mmap_events(union perf_event *event,
131 pid_t pid, pid_t tgid,
132 perf_event__handler_t process,
133 struct perf_session *session)
134{
135 char filename[PATH_MAX];
136 FILE *fp;
137
138 snprintf(filename, sizeof(filename), "/proc/%d/maps", pid);
139
140 fp = fopen(filename, "r");
141 if (fp == NULL) {
142 /*
143 * We raced with a task exiting - just return:
144 */
145 pr_debug("couldn't open %s\n", filename);
146 return -1;
147 }
148
149 event->header.type = PERF_RECORD_MMAP;
150 /*
151 * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
152 */
153 event->header.misc = PERF_RECORD_MISC_USER;
154
155 while (1) {
156 char bf[BUFSIZ], *pbf = bf;
157 int n;
158 size_t size;
159 if (fgets(bf, sizeof(bf), fp) == NULL)
160 break;
161
162 /* 00400000-0040c000 r-xp 00000000 fd:01 41038 /bin/cat */
163 n = hex2u64(pbf, &event->mmap.start);
164 if (n < 0)
165 continue;
166 pbf += n + 1;
167 n = hex2u64(pbf, &event->mmap.len);
168 if (n < 0)
169 continue;
170 pbf += n + 3;
171 if (*pbf == 'x') { /* vm_exec */
172 char anonstr[] = "//anon\n";
173 char *execname = strchr(bf, '/');
174
175 /* Catch VDSO */
176 if (execname == NULL)
177 execname = strstr(bf, "[vdso]");
178
179 /* Catch anonymous mmaps */
180 if ((execname == NULL) && !strstr(bf, "["))
181 execname = anonstr;
182
183 if (execname == NULL)
184 continue;
185
186 pbf += 3;
187 n = hex2u64(pbf, &event->mmap.pgoff);
188
189 size = strlen(execname);
190 execname[size - 1] = '\0'; /* Remove \n */
191 memcpy(event->mmap.filename, execname, size);
192 size = ALIGN(size, sizeof(u64));
193 event->mmap.len -= event->mmap.start;
194 event->mmap.header.size = (sizeof(event->mmap) -
195 (sizeof(event->mmap.filename) - size));
196 memset(event->mmap.filename + size, 0, session->id_hdr_size);
197 event->mmap.header.size += session->id_hdr_size;
198 event->mmap.pid = tgid;
199 event->mmap.tid = pid;
200
201 process(event, &synth_sample, session);
202 }
203 }
204
205 fclose(fp);
206 return 0;
207}
208
209int perf_event__synthesize_modules(perf_event__handler_t process,
210 struct perf_session *session,
211 struct machine *machine)
212{
213 struct rb_node *nd;
214 struct map_groups *kmaps = &machine->kmaps;
215 union perf_event *event = zalloc((sizeof(event->mmap) +
216 session->id_hdr_size));
217 if (event == NULL) {
218 pr_debug("Not enough memory synthesizing mmap event "
219 "for kernel modules\n");
220 return -1;
221 }
222
223 event->header.type = PERF_RECORD_MMAP;
224
225 /*
226 * kernel uses 0 for user space maps, see kernel/perf_event.c
227 * __perf_event_mmap
228 */
229 if (machine__is_host(machine))
230 event->header.misc = PERF_RECORD_MISC_KERNEL;
231 else
232 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
233
234 for (nd = rb_first(&kmaps->maps[MAP__FUNCTION]);
235 nd; nd = rb_next(nd)) {
236 size_t size;
237 struct map *pos = rb_entry(nd, struct map, rb_node);
238
239 if (pos->dso->kernel)
240 continue;
241
242 size = ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
243 event->mmap.header.type = PERF_RECORD_MMAP;
244 event->mmap.header.size = (sizeof(event->mmap) -
245 (sizeof(event->mmap.filename) - size));
246 memset(event->mmap.filename + size, 0, session->id_hdr_size);
247 event->mmap.header.size += session->id_hdr_size;
248 event->mmap.start = pos->start;
249 event->mmap.len = pos->end - pos->start;
250 event->mmap.pid = machine->pid;
251
252 memcpy(event->mmap.filename, pos->dso->long_name,
253 pos->dso->long_name_len + 1);
254 process(event, &synth_sample, session);
255 }
256
257 free(event);
258 return 0;
259}
260
261static int __event__synthesize_thread(union perf_event *comm_event,
262 union perf_event *mmap_event,
263 pid_t pid, perf_event__handler_t process,
264 struct perf_session *session)
265{
266 pid_t tgid = perf_event__synthesize_comm(comm_event, pid, 1, process,
267 session);
268 if (tgid == -1)
269 return -1;
270 return perf_event__synthesize_mmap_events(mmap_event, pid, tgid,
271 process, session);
272}
273
274int perf_event__synthesize_thread_map(struct thread_map *threads,
275 perf_event__handler_t process,
276 struct perf_session *session)
277{
278 union perf_event *comm_event, *mmap_event;
279 int err = -1, thread;
280
281 comm_event = malloc(sizeof(comm_event->comm) + session->id_hdr_size);
282 if (comm_event == NULL)
283 goto out;
284
285 mmap_event = malloc(sizeof(mmap_event->mmap) + session->id_hdr_size);
286 if (mmap_event == NULL)
287 goto out_free_comm;
288
289 err = 0;
290 for (thread = 0; thread < threads->nr; ++thread) {
291 if (__event__synthesize_thread(comm_event, mmap_event,
292 threads->map[thread],
293 process, session)) {
294 err = -1;
295 break;
296 }
297 }
298 free(mmap_event);
299out_free_comm:
300 free(comm_event);
301out:
302 return err;
303}
304
305int perf_event__synthesize_threads(perf_event__handler_t process,
306 struct perf_session *session)
307{
308 DIR *proc;
309 struct dirent dirent, *next;
310 union perf_event *comm_event, *mmap_event;
311 int err = -1;
312
313 comm_event = malloc(sizeof(comm_event->comm) + session->id_hdr_size);
314 if (comm_event == NULL)
315 goto out;
316
317 mmap_event = malloc(sizeof(mmap_event->mmap) + session->id_hdr_size);
318 if (mmap_event == NULL)
319 goto out_free_comm;
320
321 proc = opendir("/proc");
322 if (proc == NULL)
323 goto out_free_mmap;
324
325 while (!readdir_r(proc, &dirent, &next) && next) {
326 char *end;
327 pid_t pid = strtol(dirent.d_name, &end, 10);
328
329 if (*end) /* only interested in proper numerical dirents */
330 continue;
331
332 __event__synthesize_thread(comm_event, mmap_event, pid,
333 process, session);
334 }
335
336 closedir(proc);
337 err = 0;
338out_free_mmap:
339 free(mmap_event);
340out_free_comm:
341 free(comm_event);
342out:
343 return err;
344}
345
346struct process_symbol_args {
347 const char *name;
348 u64 start;
349};
350
351static int find_symbol_cb(void *arg, const char *name, char type,
352 u64 start, u64 end __used)
353{
354 struct process_symbol_args *args = arg;
355
356 /*
357 * Must be a function or at least an alias, as in PARISC64, where "_text" is
358 * an 'A' to the same address as "_stext".
359 */
360 if (!(symbol_type__is_a(type, MAP__FUNCTION) ||
361 type == 'A') || strcmp(name, args->name))
362 return 0;
363
364 args->start = start;
365 return 1;
366}
367
368int perf_event__synthesize_kernel_mmap(perf_event__handler_t process,
369 struct perf_session *session,
370 struct machine *machine,
371 const char *symbol_name)
372{
373 size_t size;
374 const char *filename, *mmap_name;
375 char path[PATH_MAX];
376 char name_buff[PATH_MAX];
377 struct map *map;
378 int err;
379 /*
380 * We should get this from /sys/kernel/sections/.text, but till that is
381 * available use this, and after it is use this as a fallback for older
382 * kernels.
383 */
384 struct process_symbol_args args = { .name = symbol_name, };
385 union perf_event *event = zalloc((sizeof(event->mmap) +
386 session->id_hdr_size));
387 if (event == NULL) {
388 pr_debug("Not enough memory synthesizing mmap event "
389 "for kernel modules\n");
390 return -1;
391 }
392
393 mmap_name = machine__mmap_name(machine, name_buff, sizeof(name_buff));
394 if (machine__is_host(machine)) {
395 /*
396 * kernel uses PERF_RECORD_MISC_USER for user space maps,
397 * see kernel/perf_event.c __perf_event_mmap
398 */
399 event->header.misc = PERF_RECORD_MISC_KERNEL;
400 filename = "/proc/kallsyms";
401 } else {
402 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
403 if (machine__is_default_guest(machine))
404 filename = (char *) symbol_conf.default_guest_kallsyms;
405 else {
406 sprintf(path, "%s/proc/kallsyms", machine->root_dir);
407 filename = path;
408 }
409 }
410
411 if (kallsyms__parse(filename, &args, find_symbol_cb) <= 0)
412 return -ENOENT;
413
414 map = machine->vmlinux_maps[MAP__FUNCTION];
415 size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
416 "%s%s", mmap_name, symbol_name) + 1;
417 size = ALIGN(size, sizeof(u64));
418 event->mmap.header.type = PERF_RECORD_MMAP;
419 event->mmap.header.size = (sizeof(event->mmap) -
420 (sizeof(event->mmap.filename) - size) + session->id_hdr_size);
421 event->mmap.pgoff = args.start;
422 event->mmap.start = map->start;
423 event->mmap.len = map->end - event->mmap.start;
424 event->mmap.pid = machine->pid;
425
426 err = process(event, &synth_sample, session);
427 free(event);
428
429 return err;
430}
431
432int perf_event__process_comm(union perf_event *event,
433 struct perf_sample *sample __used,
434 struct perf_session *session)
435{
436 struct thread *thread = perf_session__findnew(session, event->comm.tid);
437
438 dump_printf(": %s:%d\n", event->comm.comm, event->comm.tid);
439
440 if (thread == NULL || thread__set_comm(thread, event->comm.comm)) {
441 dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n");
442 return -1;
443 }
444
445 return 0;
446}
447
448int perf_event__process_lost(union perf_event *event,
449 struct perf_sample *sample __used,
450 struct perf_session *session)
451{
452 dump_printf(": id:%" PRIu64 ": lost:%" PRIu64 "\n",
453 event->lost.id, event->lost.lost);
454 session->hists.stats.total_lost += event->lost.lost;
455 return 0;
456}
457
458static void perf_event__set_kernel_mmap_len(union perf_event *event,
459 struct map **maps)
460{
461 maps[MAP__FUNCTION]->start = event->mmap.start;
462 maps[MAP__FUNCTION]->end = event->mmap.start + event->mmap.len;
463 /*
464 * Be a bit paranoid here, some perf.data file came with
465 * a zero sized synthesized MMAP event for the kernel.
466 */
467 if (maps[MAP__FUNCTION]->end == 0)
468 maps[MAP__FUNCTION]->end = ~0ULL;
469}
470
471static int perf_event__process_kernel_mmap(union perf_event *event,
472 struct perf_session *session)
473{
474 struct map *map;
475 char kmmap_prefix[PATH_MAX];
476 struct machine *machine;
477 enum dso_kernel_type kernel_type;
478 bool is_kernel_mmap;
479
480 machine = perf_session__findnew_machine(session, event->mmap.pid);
481 if (!machine) {
482 pr_err("Can't find id %d's machine\n", event->mmap.pid);
483 goto out_problem;
484 }
485
486 machine__mmap_name(machine, kmmap_prefix, sizeof(kmmap_prefix));
487 if (machine__is_host(machine))
488 kernel_type = DSO_TYPE_KERNEL;
489 else
490 kernel_type = DSO_TYPE_GUEST_KERNEL;
491
492 is_kernel_mmap = memcmp(event->mmap.filename,
493 kmmap_prefix,
494 strlen(kmmap_prefix)) == 0;
495 if (event->mmap.filename[0] == '/' ||
496 (!is_kernel_mmap && event->mmap.filename[0] == '[')) {
497
498 char short_module_name[1024];
499 char *name, *dot;
500
501 if (event->mmap.filename[0] == '/') {
502 name = strrchr(event->mmap.filename, '/');
503 if (name == NULL)
504 goto out_problem;
505
506 ++name; /* skip / */
507 dot = strrchr(name, '.');
508 if (dot == NULL)
509 goto out_problem;
510 snprintf(short_module_name, sizeof(short_module_name),
511 "[%.*s]", (int)(dot - name), name);
512 strxfrchar(short_module_name, '-', '_');
513 } else
514 strcpy(short_module_name, event->mmap.filename);
515
516 map = machine__new_module(machine, event->mmap.start,
517 event->mmap.filename);
518 if (map == NULL)
519 goto out_problem;
520
521 name = strdup(short_module_name);
522 if (name == NULL)
523 goto out_problem;
524
525 map->dso->short_name = name;
526 map->dso->sname_alloc = 1;
527 map->end = map->start + event->mmap.len;
528 } else if (is_kernel_mmap) {
529 const char *symbol_name = (event->mmap.filename +
530 strlen(kmmap_prefix));
531 /*
532 * Should be there already, from the build-id table in
533 * the header.
534 */
535 struct dso *kernel = __dsos__findnew(&machine->kernel_dsos,
536 kmmap_prefix);
537 if (kernel == NULL)
538 goto out_problem;
539
540 kernel->kernel = kernel_type;
541 if (__machine__create_kernel_maps(machine, kernel) < 0)
542 goto out_problem;
543
544 perf_event__set_kernel_mmap_len(event, machine->vmlinux_maps);
545
546 /*
547 * Avoid using a zero address (kptr_restrict) for the ref reloc
548 * symbol. Effectively having zero here means that at record
549 * time /proc/sys/kernel/kptr_restrict was non zero.
550 */
551 if (event->mmap.pgoff != 0) {
552 perf_session__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps,
553 symbol_name,
554 event->mmap.pgoff);
555 }
556
557 if (machine__is_default_guest(machine)) {
558 /*
559 * preload dso of guest kernel and modules
560 */
561 dso__load(kernel, machine->vmlinux_maps[MAP__FUNCTION],
562 NULL);
563 }
564 }
565 return 0;
566out_problem:
567 return -1;
568}
569
570int perf_event__process_mmap(union perf_event *event,
571 struct perf_sample *sample __used,
572 struct perf_session *session)
573{
574 struct machine *machine;
575 struct thread *thread;
576 struct map *map;
577 u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
578 int ret = 0;
579
580 dump_printf(" %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %s\n",
581 event->mmap.pid, event->mmap.tid, event->mmap.start,
582 event->mmap.len, event->mmap.pgoff, event->mmap.filename);
583
584 if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL ||
585 cpumode == PERF_RECORD_MISC_KERNEL) {
586 ret = perf_event__process_kernel_mmap(event, session);
587 if (ret < 0)
588 goto out_problem;
589 return 0;
590 }
591
592 machine = perf_session__find_host_machine(session);
593 if (machine == NULL)
594 goto out_problem;
595 thread = perf_session__findnew(session, event->mmap.pid);
596 if (thread == NULL)
597 goto out_problem;
598 map = map__new(&machine->user_dsos, event->mmap.start,
599 event->mmap.len, event->mmap.pgoff,
600 event->mmap.pid, event->mmap.filename,
601 MAP__FUNCTION);
602 if (map == NULL)
603 goto out_problem;
604
605 thread__insert_map(thread, map);
606 return 0;
607
608out_problem:
609 dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n");
610 return 0;
611}
612
613int perf_event__process_task(union perf_event *event,
614 struct perf_sample *sample __used,
615 struct perf_session *session)
616{
617 struct thread *thread = perf_session__findnew(session, event->fork.tid);
618 struct thread *parent = perf_session__findnew(session, event->fork.ptid);
619
620 dump_printf("(%d:%d):(%d:%d)\n", event->fork.pid, event->fork.tid,
621 event->fork.ppid, event->fork.ptid);
622
623 if (event->header.type == PERF_RECORD_EXIT) {
624 perf_session__remove_thread(session, thread);
625 return 0;
626 }
627
628 if (thread == NULL || parent == NULL ||
629 thread__fork(thread, parent) < 0) {
630 dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n");
631 return -1;
632 }
633
634 return 0;
635}
636
637int perf_event__process(union perf_event *event, struct perf_sample *sample,
638 struct perf_session *session)
639{
640 switch (event->header.type) {
641 case PERF_RECORD_COMM:
642 perf_event__process_comm(event, sample, session);
643 break;
644 case PERF_RECORD_MMAP:
645 perf_event__process_mmap(event, sample, session);
646 break;
647 case PERF_RECORD_FORK:
648 case PERF_RECORD_EXIT:
649 perf_event__process_task(event, sample, session);
650 break;
651 case PERF_RECORD_LOST:
652 perf_event__process_lost(event, sample, session);
653 default:
654 break;
655 }
656
657 return 0;
658}
659
660void thread__find_addr_map(struct thread *self,
661 struct perf_session *session, u8 cpumode,
662 enum map_type type, pid_t pid, u64 addr,
663 struct addr_location *al)
664{
665 struct map_groups *mg = &self->mg;
666 struct machine *machine = NULL;
667
668 al->thread = self;
669 al->addr = addr;
670 al->cpumode = cpumode;
671 al->filtered = false;
672
673 if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
674 al->level = 'k';
675 machine = perf_session__find_host_machine(session);
676 if (machine == NULL) {
677 al->map = NULL;
678 return;
679 }
680 mg = &machine->kmaps;
681 } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
682 al->level = '.';
683 machine = perf_session__find_host_machine(session);
684 } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
685 al->level = 'g';
686 machine = perf_session__find_machine(session, pid);
687 if (machine == NULL) {
688 al->map = NULL;
689 return;
690 }
691 mg = &machine->kmaps;
692 } else {
693 /*
694 * 'u' means guest os user space.
695 * TODO: We don't support guest user space. Might support late.
696 */
697 if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest)
698 al->level = 'u';
699 else
700 al->level = 'H';
701 al->map = NULL;
702
703 if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
704 cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
705 !perf_guest)
706 al->filtered = true;
707 if ((cpumode == PERF_RECORD_MISC_USER ||
708 cpumode == PERF_RECORD_MISC_KERNEL) &&
709 !perf_host)
710 al->filtered = true;
711
712 return;
713 }
714try_again:
715 al->map = map_groups__find(mg, type, al->addr);
716 if (al->map == NULL) {
717 /*
718 * If this is outside of all known maps, and is a negative
719 * address, try to look it up in the kernel dso, as it might be
720 * a vsyscall or vdso (which executes in user-mode).
721 *
722 * XXX This is nasty, we should have a symbol list in the
723 * "[vdso]" dso, but for now lets use the old trick of looking
724 * in the whole kernel symbol list.
725 */
726 if ((long long)al->addr < 0 &&
727 cpumode == PERF_RECORD_MISC_USER &&
728 machine && mg != &machine->kmaps) {
729 mg = &machine->kmaps;
730 goto try_again;
731 }
732 } else
733 al->addr = al->map->map_ip(al->map, al->addr);
734}
735
736void thread__find_addr_location(struct thread *self,
737 struct perf_session *session, u8 cpumode,
738 enum map_type type, pid_t pid, u64 addr,
739 struct addr_location *al,
740 symbol_filter_t filter)
741{
742 thread__find_addr_map(self, session, cpumode, type, pid, addr, al);
743 if (al->map != NULL)
744 al->sym = map__find_symbol(al->map, al->addr, filter);
745 else
746 al->sym = NULL;
747}
748
749int perf_event__preprocess_sample(const union perf_event *event,
750 struct perf_session *session,
751 struct addr_location *al,
752 struct perf_sample *sample,
753 symbol_filter_t filter)
754{
755 u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
756 struct thread *thread = perf_session__findnew(session, event->ip.pid);
757
758 if (thread == NULL)
759 return -1;
760
761 if (symbol_conf.comm_list &&
762 !strlist__has_entry(symbol_conf.comm_list, thread->comm))
763 goto out_filtered;
764
765 dump_printf(" ... thread: %s:%d\n", thread->comm, thread->pid);
766 /*
767 * Have we already created the kernel maps for the host machine?
768 *
769 * This should have happened earlier, when we processed the kernel MMAP
770 * events, but for older perf.data files there was no such thing, so do
771 * it now.
772 */
773 if (cpumode == PERF_RECORD_MISC_KERNEL &&
774 session->host_machine.vmlinux_maps[MAP__FUNCTION] == NULL)
775 machine__create_kernel_maps(&session->host_machine);
776
777 thread__find_addr_map(thread, session, cpumode, MAP__FUNCTION,
778 event->ip.pid, event->ip.ip, al);
779 dump_printf(" ...... dso: %s\n",
780 al->map ? al->map->dso->long_name :
781 al->level == 'H' ? "[hypervisor]" : "<not found>");
782 al->sym = NULL;
783 al->cpu = sample->cpu;
784
785 if (al->map) {
786 if (symbol_conf.dso_list &&
787 (!al->map || !al->map->dso ||
788 !(strlist__has_entry(symbol_conf.dso_list,
789 al->map->dso->short_name) ||
790 (al->map->dso->short_name != al->map->dso->long_name &&
791 strlist__has_entry(symbol_conf.dso_list,
792 al->map->dso->long_name)))))
793 goto out_filtered;
794
795 al->sym = map__find_symbol(al->map, al->addr, filter);
796 }
797
798 if (symbol_conf.sym_list && al->sym &&
799 !strlist__has_entry(symbol_conf.sym_list, al->sym->name))
800 goto out_filtered;
801
802 return 0;
803
804out_filtered:
805 al->filtered = true;
806 return 0;
807}
1#include <linux/types.h>
2#include "event.h"
3#include "debug.h"
4#include "hist.h"
5#include "machine.h"
6#include "sort.h"
7#include "string.h"
8#include "strlist.h"
9#include "thread.h"
10#include "thread_map.h"
11#include "symbol/kallsyms.h"
12
13static const char *perf_event__names[] = {
14 [0] = "TOTAL",
15 [PERF_RECORD_MMAP] = "MMAP",
16 [PERF_RECORD_MMAP2] = "MMAP2",
17 [PERF_RECORD_LOST] = "LOST",
18 [PERF_RECORD_COMM] = "COMM",
19 [PERF_RECORD_EXIT] = "EXIT",
20 [PERF_RECORD_THROTTLE] = "THROTTLE",
21 [PERF_RECORD_UNTHROTTLE] = "UNTHROTTLE",
22 [PERF_RECORD_FORK] = "FORK",
23 [PERF_RECORD_READ] = "READ",
24 [PERF_RECORD_SAMPLE] = "SAMPLE",
25 [PERF_RECORD_HEADER_ATTR] = "ATTR",
26 [PERF_RECORD_HEADER_EVENT_TYPE] = "EVENT_TYPE",
27 [PERF_RECORD_HEADER_TRACING_DATA] = "TRACING_DATA",
28 [PERF_RECORD_HEADER_BUILD_ID] = "BUILD_ID",
29 [PERF_RECORD_FINISHED_ROUND] = "FINISHED_ROUND",
30};
31
32const char *perf_event__name(unsigned int id)
33{
34 if (id >= ARRAY_SIZE(perf_event__names))
35 return "INVALID";
36 if (!perf_event__names[id])
37 return "UNKNOWN";
38 return perf_event__names[id];
39}
40
41static struct perf_sample synth_sample = {
42 .pid = -1,
43 .tid = -1,
44 .time = -1,
45 .stream_id = -1,
46 .cpu = -1,
47 .period = 1,
48};
49
50static pid_t perf_event__get_comm_tgid(pid_t pid, char *comm, size_t len)
51{
52 char filename[PATH_MAX];
53 char bf[BUFSIZ];
54 FILE *fp;
55 size_t size = 0;
56 pid_t tgid = -1;
57
58 snprintf(filename, sizeof(filename), "/proc/%d/status", pid);
59
60 fp = fopen(filename, "r");
61 if (fp == NULL) {
62 pr_debug("couldn't open %s\n", filename);
63 return 0;
64 }
65
66 while (!comm[0] || (tgid < 0)) {
67 if (fgets(bf, sizeof(bf), fp) == NULL) {
68 pr_warning("couldn't get COMM and pgid, malformed %s\n",
69 filename);
70 break;
71 }
72
73 if (memcmp(bf, "Name:", 5) == 0) {
74 char *name = bf + 5;
75 while (*name && isspace(*name))
76 ++name;
77 size = strlen(name) - 1;
78 if (size >= len)
79 size = len - 1;
80 memcpy(comm, name, size);
81 comm[size] = '\0';
82
83 } else if (memcmp(bf, "Tgid:", 5) == 0) {
84 char *tgids = bf + 5;
85 while (*tgids && isspace(*tgids))
86 ++tgids;
87 tgid = atoi(tgids);
88 }
89 }
90
91 fclose(fp);
92
93 return tgid;
94}
95
96static pid_t perf_event__synthesize_comm(struct perf_tool *tool,
97 union perf_event *event, pid_t pid,
98 perf_event__handler_t process,
99 struct machine *machine)
100{
101 size_t size;
102 pid_t tgid;
103
104 memset(&event->comm, 0, sizeof(event->comm));
105
106 if (machine__is_host(machine))
107 tgid = perf_event__get_comm_tgid(pid, event->comm.comm,
108 sizeof(event->comm.comm));
109 else
110 tgid = machine->pid;
111
112 if (tgid < 0)
113 goto out;
114
115 event->comm.pid = tgid;
116 event->comm.header.type = PERF_RECORD_COMM;
117
118 size = strlen(event->comm.comm) + 1;
119 size = PERF_ALIGN(size, sizeof(u64));
120 memset(event->comm.comm + size, 0, machine->id_hdr_size);
121 event->comm.header.size = (sizeof(event->comm) -
122 (sizeof(event->comm.comm) - size) +
123 machine->id_hdr_size);
124 event->comm.tid = pid;
125
126 if (process(tool, event, &synth_sample, machine) != 0)
127 return -1;
128
129out:
130 return tgid;
131}
132
133static int perf_event__synthesize_fork(struct perf_tool *tool,
134 union perf_event *event, pid_t pid,
135 pid_t tgid, perf_event__handler_t process,
136 struct machine *machine)
137{
138 memset(&event->fork, 0, sizeof(event->fork) + machine->id_hdr_size);
139
140 /* this is really a clone event but we use fork to synthesize it */
141 event->fork.ppid = tgid;
142 event->fork.ptid = tgid;
143 event->fork.pid = tgid;
144 event->fork.tid = pid;
145 event->fork.header.type = PERF_RECORD_FORK;
146
147 event->fork.header.size = (sizeof(event->fork) + machine->id_hdr_size);
148
149 if (process(tool, event, &synth_sample, machine) != 0)
150 return -1;
151
152 return 0;
153}
154
155int perf_event__synthesize_mmap_events(struct perf_tool *tool,
156 union perf_event *event,
157 pid_t pid, pid_t tgid,
158 perf_event__handler_t process,
159 struct machine *machine,
160 bool mmap_data)
161{
162 char filename[PATH_MAX];
163 FILE *fp;
164 int rc = 0;
165
166 if (machine__is_default_guest(machine))
167 return 0;
168
169 snprintf(filename, sizeof(filename), "%s/proc/%d/maps",
170 machine->root_dir, pid);
171
172 fp = fopen(filename, "r");
173 if (fp == NULL) {
174 /*
175 * We raced with a task exiting - just return:
176 */
177 pr_debug("couldn't open %s\n", filename);
178 return -1;
179 }
180
181 event->header.type = PERF_RECORD_MMAP;
182
183 while (1) {
184 char bf[BUFSIZ];
185 char prot[5];
186 char execname[PATH_MAX];
187 char anonstr[] = "//anon";
188 size_t size;
189 ssize_t n;
190
191 if (fgets(bf, sizeof(bf), fp) == NULL)
192 break;
193
194 /* ensure null termination since stack will be reused. */
195 strcpy(execname, "");
196
197 /* 00400000-0040c000 r-xp 00000000 fd:01 41038 /bin/cat */
198 n = sscanf(bf, "%"PRIx64"-%"PRIx64" %s %"PRIx64" %*x:%*x %*u %s\n",
199 &event->mmap.start, &event->mmap.len, prot,
200 &event->mmap.pgoff,
201 execname);
202 /*
203 * Anon maps don't have the execname.
204 */
205 if (n < 4)
206 continue;
207 /*
208 * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
209 */
210 if (machine__is_host(machine))
211 event->header.misc = PERF_RECORD_MISC_USER;
212 else
213 event->header.misc = PERF_RECORD_MISC_GUEST_USER;
214
215 if (prot[2] != 'x') {
216 if (!mmap_data || prot[0] != 'r')
217 continue;
218
219 event->header.misc |= PERF_RECORD_MISC_MMAP_DATA;
220 }
221
222 if (!strcmp(execname, ""))
223 strcpy(execname, anonstr);
224
225 size = strlen(execname) + 1;
226 memcpy(event->mmap.filename, execname, size);
227 size = PERF_ALIGN(size, sizeof(u64));
228 event->mmap.len -= event->mmap.start;
229 event->mmap.header.size = (sizeof(event->mmap) -
230 (sizeof(event->mmap.filename) - size));
231 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
232 event->mmap.header.size += machine->id_hdr_size;
233 event->mmap.pid = tgid;
234 event->mmap.tid = pid;
235
236 if (process(tool, event, &synth_sample, machine) != 0) {
237 rc = -1;
238 break;
239 }
240 }
241
242 fclose(fp);
243 return rc;
244}
245
246int perf_event__synthesize_modules(struct perf_tool *tool,
247 perf_event__handler_t process,
248 struct machine *machine)
249{
250 int rc = 0;
251 struct rb_node *nd;
252 struct map_groups *kmaps = &machine->kmaps;
253 union perf_event *event = zalloc((sizeof(event->mmap) +
254 machine->id_hdr_size));
255 if (event == NULL) {
256 pr_debug("Not enough memory synthesizing mmap event "
257 "for kernel modules\n");
258 return -1;
259 }
260
261 event->header.type = PERF_RECORD_MMAP;
262
263 /*
264 * kernel uses 0 for user space maps, see kernel/perf_event.c
265 * __perf_event_mmap
266 */
267 if (machine__is_host(machine))
268 event->header.misc = PERF_RECORD_MISC_KERNEL;
269 else
270 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
271
272 for (nd = rb_first(&kmaps->maps[MAP__FUNCTION]);
273 nd; nd = rb_next(nd)) {
274 size_t size;
275 struct map *pos = rb_entry(nd, struct map, rb_node);
276
277 if (pos->dso->kernel)
278 continue;
279
280 size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
281 event->mmap.header.type = PERF_RECORD_MMAP;
282 event->mmap.header.size = (sizeof(event->mmap) -
283 (sizeof(event->mmap.filename) - size));
284 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
285 event->mmap.header.size += machine->id_hdr_size;
286 event->mmap.start = pos->start;
287 event->mmap.len = pos->end - pos->start;
288 event->mmap.pid = machine->pid;
289
290 memcpy(event->mmap.filename, pos->dso->long_name,
291 pos->dso->long_name_len + 1);
292 if (process(tool, event, &synth_sample, machine) != 0) {
293 rc = -1;
294 break;
295 }
296 }
297
298 free(event);
299 return rc;
300}
301
302static int __event__synthesize_thread(union perf_event *comm_event,
303 union perf_event *mmap_event,
304 union perf_event *fork_event,
305 pid_t pid, int full,
306 perf_event__handler_t process,
307 struct perf_tool *tool,
308 struct machine *machine, bool mmap_data)
309{
310 char filename[PATH_MAX];
311 DIR *tasks;
312 struct dirent dirent, *next;
313 pid_t tgid;
314
315 /* special case: only send one comm event using passed in pid */
316 if (!full) {
317 tgid = perf_event__synthesize_comm(tool, comm_event, pid,
318 process, machine);
319
320 if (tgid == -1)
321 return -1;
322
323 return perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
324 process, machine, mmap_data);
325 }
326
327 if (machine__is_default_guest(machine))
328 return 0;
329
330 snprintf(filename, sizeof(filename), "%s/proc/%d/task",
331 machine->root_dir, pid);
332
333 tasks = opendir(filename);
334 if (tasks == NULL) {
335 pr_debug("couldn't open %s\n", filename);
336 return 0;
337 }
338
339 while (!readdir_r(tasks, &dirent, &next) && next) {
340 char *end;
341 int rc = 0;
342 pid_t _pid;
343
344 _pid = strtol(dirent.d_name, &end, 10);
345 if (*end)
346 continue;
347
348 tgid = perf_event__synthesize_comm(tool, comm_event, _pid,
349 process, machine);
350 if (tgid == -1)
351 return -1;
352
353 if (_pid == pid) {
354 /* process the parent's maps too */
355 rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
356 process, machine, mmap_data);
357 } else {
358 /* only fork the tid's map, to save time */
359 rc = perf_event__synthesize_fork(tool, fork_event, _pid, tgid,
360 process, machine);
361 }
362
363 if (rc)
364 return rc;
365 }
366
367 closedir(tasks);
368 return 0;
369}
370
371int perf_event__synthesize_thread_map(struct perf_tool *tool,
372 struct thread_map *threads,
373 perf_event__handler_t process,
374 struct machine *machine,
375 bool mmap_data)
376{
377 union perf_event *comm_event, *mmap_event, *fork_event;
378 int err = -1, thread, j;
379
380 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
381 if (comm_event == NULL)
382 goto out;
383
384 mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size);
385 if (mmap_event == NULL)
386 goto out_free_comm;
387
388 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
389 if (fork_event == NULL)
390 goto out_free_mmap;
391
392 err = 0;
393 for (thread = 0; thread < threads->nr; ++thread) {
394 if (__event__synthesize_thread(comm_event, mmap_event,
395 fork_event,
396 threads->map[thread], 0,
397 process, tool, machine,
398 mmap_data)) {
399 err = -1;
400 break;
401 }
402
403 /*
404 * comm.pid is set to thread group id by
405 * perf_event__synthesize_comm
406 */
407 if ((int) comm_event->comm.pid != threads->map[thread]) {
408 bool need_leader = true;
409
410 /* is thread group leader in thread_map? */
411 for (j = 0; j < threads->nr; ++j) {
412 if ((int) comm_event->comm.pid == threads->map[j]) {
413 need_leader = false;
414 break;
415 }
416 }
417
418 /* if not, generate events for it */
419 if (need_leader &&
420 __event__synthesize_thread(comm_event, mmap_event,
421 fork_event,
422 comm_event->comm.pid, 0,
423 process, tool, machine,
424 mmap_data)) {
425 err = -1;
426 break;
427 }
428 }
429 }
430 free(fork_event);
431out_free_mmap:
432 free(mmap_event);
433out_free_comm:
434 free(comm_event);
435out:
436 return err;
437}
438
439int perf_event__synthesize_threads(struct perf_tool *tool,
440 perf_event__handler_t process,
441 struct machine *machine, bool mmap_data)
442{
443 DIR *proc;
444 char proc_path[PATH_MAX];
445 struct dirent dirent, *next;
446 union perf_event *comm_event, *mmap_event, *fork_event;
447 int err = -1;
448
449 if (machine__is_default_guest(machine))
450 return 0;
451
452 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
453 if (comm_event == NULL)
454 goto out;
455
456 mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size);
457 if (mmap_event == NULL)
458 goto out_free_comm;
459
460 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
461 if (fork_event == NULL)
462 goto out_free_mmap;
463
464 snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir);
465 proc = opendir(proc_path);
466
467 if (proc == NULL)
468 goto out_free_fork;
469
470 while (!readdir_r(proc, &dirent, &next) && next) {
471 char *end;
472 pid_t pid = strtol(dirent.d_name, &end, 10);
473
474 if (*end) /* only interested in proper numerical dirents */
475 continue;
476 /*
477 * We may race with exiting thread, so don't stop just because
478 * one thread couldn't be synthesized.
479 */
480 __event__synthesize_thread(comm_event, mmap_event, fork_event, pid,
481 1, process, tool, machine, mmap_data);
482 }
483
484 err = 0;
485 closedir(proc);
486out_free_fork:
487 free(fork_event);
488out_free_mmap:
489 free(mmap_event);
490out_free_comm:
491 free(comm_event);
492out:
493 return err;
494}
495
496struct process_symbol_args {
497 const char *name;
498 u64 start;
499};
500
501static int find_symbol_cb(void *arg, const char *name, char type,
502 u64 start)
503{
504 struct process_symbol_args *args = arg;
505
506 /*
507 * Must be a function or at least an alias, as in PARISC64, where "_text" is
508 * an 'A' to the same address as "_stext".
509 */
510 if (!(symbol_type__is_a(type, MAP__FUNCTION) ||
511 type == 'A') || strcmp(name, args->name))
512 return 0;
513
514 args->start = start;
515 return 1;
516}
517
518u64 kallsyms__get_function_start(const char *kallsyms_filename,
519 const char *symbol_name)
520{
521 struct process_symbol_args args = { .name = symbol_name, };
522
523 if (kallsyms__parse(kallsyms_filename, &args, find_symbol_cb) <= 0)
524 return 0;
525
526 return args.start;
527}
528
529int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
530 perf_event__handler_t process,
531 struct machine *machine)
532{
533 size_t size;
534 const char *mmap_name;
535 char name_buff[PATH_MAX];
536 struct map *map;
537 struct kmap *kmap;
538 int err;
539 /*
540 * We should get this from /sys/kernel/sections/.text, but till that is
541 * available use this, and after it is use this as a fallback for older
542 * kernels.
543 */
544 union perf_event *event = zalloc((sizeof(event->mmap) +
545 machine->id_hdr_size));
546 if (event == NULL) {
547 pr_debug("Not enough memory synthesizing mmap event "
548 "for kernel modules\n");
549 return -1;
550 }
551
552 mmap_name = machine__mmap_name(machine, name_buff, sizeof(name_buff));
553 if (machine__is_host(machine)) {
554 /*
555 * kernel uses PERF_RECORD_MISC_USER for user space maps,
556 * see kernel/perf_event.c __perf_event_mmap
557 */
558 event->header.misc = PERF_RECORD_MISC_KERNEL;
559 } else {
560 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
561 }
562
563 map = machine->vmlinux_maps[MAP__FUNCTION];
564 kmap = map__kmap(map);
565 size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
566 "%s%s", mmap_name, kmap->ref_reloc_sym->name) + 1;
567 size = PERF_ALIGN(size, sizeof(u64));
568 event->mmap.header.type = PERF_RECORD_MMAP;
569 event->mmap.header.size = (sizeof(event->mmap) -
570 (sizeof(event->mmap.filename) - size) + machine->id_hdr_size);
571 event->mmap.pgoff = kmap->ref_reloc_sym->addr;
572 event->mmap.start = map->start;
573 event->mmap.len = map->end - event->mmap.start;
574 event->mmap.pid = machine->pid;
575
576 err = process(tool, event, &synth_sample, machine);
577 free(event);
578
579 return err;
580}
581
582size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
583{
584 return fprintf(fp, ": %s:%d\n", event->comm.comm, event->comm.tid);
585}
586
587int perf_event__process_comm(struct perf_tool *tool __maybe_unused,
588 union perf_event *event,
589 struct perf_sample *sample,
590 struct machine *machine)
591{
592 return machine__process_comm_event(machine, event, sample);
593}
594
595int perf_event__process_lost(struct perf_tool *tool __maybe_unused,
596 union perf_event *event,
597 struct perf_sample *sample,
598 struct machine *machine)
599{
600 return machine__process_lost_event(machine, event, sample);
601}
602
603size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
604{
605 return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %c %s\n",
606 event->mmap.pid, event->mmap.tid, event->mmap.start,
607 event->mmap.len, event->mmap.pgoff,
608 (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x',
609 event->mmap.filename);
610}
611
612size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp)
613{
614 return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64
615 " %02x:%02x %"PRIu64" %"PRIu64"]: %c %s\n",
616 event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
617 event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj,
618 event->mmap2.min, event->mmap2.ino,
619 event->mmap2.ino_generation,
620 (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x',
621 event->mmap2.filename);
622}
623
624int perf_event__process_mmap(struct perf_tool *tool __maybe_unused,
625 union perf_event *event,
626 struct perf_sample *sample,
627 struct machine *machine)
628{
629 return machine__process_mmap_event(machine, event, sample);
630}
631
632int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused,
633 union perf_event *event,
634 struct perf_sample *sample,
635 struct machine *machine)
636{
637 return machine__process_mmap2_event(machine, event, sample);
638}
639
640size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
641{
642 return fprintf(fp, "(%d:%d):(%d:%d)\n",
643 event->fork.pid, event->fork.tid,
644 event->fork.ppid, event->fork.ptid);
645}
646
647int perf_event__process_fork(struct perf_tool *tool __maybe_unused,
648 union perf_event *event,
649 struct perf_sample *sample,
650 struct machine *machine)
651{
652 return machine__process_fork_event(machine, event, sample);
653}
654
655int perf_event__process_exit(struct perf_tool *tool __maybe_unused,
656 union perf_event *event,
657 struct perf_sample *sample,
658 struct machine *machine)
659{
660 return machine__process_exit_event(machine, event, sample);
661}
662
663size_t perf_event__fprintf(union perf_event *event, FILE *fp)
664{
665 size_t ret = fprintf(fp, "PERF_RECORD_%s",
666 perf_event__name(event->header.type));
667
668 switch (event->header.type) {
669 case PERF_RECORD_COMM:
670 ret += perf_event__fprintf_comm(event, fp);
671 break;
672 case PERF_RECORD_FORK:
673 case PERF_RECORD_EXIT:
674 ret += perf_event__fprintf_task(event, fp);
675 break;
676 case PERF_RECORD_MMAP:
677 ret += perf_event__fprintf_mmap(event, fp);
678 break;
679 case PERF_RECORD_MMAP2:
680 ret += perf_event__fprintf_mmap2(event, fp);
681 break;
682 default:
683 ret += fprintf(fp, "\n");
684 }
685
686 return ret;
687}
688
689int perf_event__process(struct perf_tool *tool __maybe_unused,
690 union perf_event *event,
691 struct perf_sample *sample,
692 struct machine *machine)
693{
694 return machine__process_event(machine, event, sample);
695}
696
697void thread__find_addr_map(struct thread *thread,
698 struct machine *machine, u8 cpumode,
699 enum map_type type, u64 addr,
700 struct addr_location *al)
701{
702 struct map_groups *mg = &thread->mg;
703 bool load_map = false;
704
705 al->machine = machine;
706 al->thread = thread;
707 al->addr = addr;
708 al->cpumode = cpumode;
709 al->filtered = 0;
710
711 if (machine == NULL) {
712 al->map = NULL;
713 return;
714 }
715
716 if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
717 al->level = 'k';
718 mg = &machine->kmaps;
719 load_map = true;
720 } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
721 al->level = '.';
722 } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
723 al->level = 'g';
724 mg = &machine->kmaps;
725 load_map = true;
726 } else if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) {
727 al->level = 'u';
728 } else {
729 al->level = 'H';
730 al->map = NULL;
731
732 if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
733 cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
734 !perf_guest)
735 al->filtered |= (1 << HIST_FILTER__GUEST);
736 if ((cpumode == PERF_RECORD_MISC_USER ||
737 cpumode == PERF_RECORD_MISC_KERNEL) &&
738 !perf_host)
739 al->filtered |= (1 << HIST_FILTER__HOST);
740
741 return;
742 }
743try_again:
744 al->map = map_groups__find(mg, type, al->addr);
745 if (al->map == NULL) {
746 /*
747 * If this is outside of all known maps, and is a negative
748 * address, try to look it up in the kernel dso, as it might be
749 * a vsyscall or vdso (which executes in user-mode).
750 *
751 * XXX This is nasty, we should have a symbol list in the
752 * "[vdso]" dso, but for now lets use the old trick of looking
753 * in the whole kernel symbol list.
754 */
755 if ((long long)al->addr < 0 &&
756 cpumode == PERF_RECORD_MISC_USER &&
757 machine && mg != &machine->kmaps) {
758 mg = &machine->kmaps;
759 goto try_again;
760 }
761 } else {
762 /*
763 * Kernel maps might be changed when loading symbols so loading
764 * must be done prior to using kernel maps.
765 */
766 if (load_map)
767 map__load(al->map, machine->symbol_filter);
768 al->addr = al->map->map_ip(al->map, al->addr);
769 }
770}
771
772void thread__find_addr_location(struct thread *thread, struct machine *machine,
773 u8 cpumode, enum map_type type, u64 addr,
774 struct addr_location *al)
775{
776 thread__find_addr_map(thread, machine, cpumode, type, addr, al);
777 if (al->map != NULL)
778 al->sym = map__find_symbol(al->map, al->addr,
779 machine->symbol_filter);
780 else
781 al->sym = NULL;
782}
783
784int perf_event__preprocess_sample(const union perf_event *event,
785 struct machine *machine,
786 struct addr_location *al,
787 struct perf_sample *sample)
788{
789 u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
790 struct thread *thread = machine__findnew_thread(machine, sample->pid,
791 sample->pid);
792
793 if (thread == NULL)
794 return -1;
795
796 dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
797 /*
798 * Have we already created the kernel maps for this machine?
799 *
800 * This should have happened earlier, when we processed the kernel MMAP
801 * events, but for older perf.data files there was no such thing, so do
802 * it now.
803 */
804 if (cpumode == PERF_RECORD_MISC_KERNEL &&
805 machine->vmlinux_maps[MAP__FUNCTION] == NULL)
806 machine__create_kernel_maps(machine);
807
808 thread__find_addr_map(thread, machine, cpumode, MAP__FUNCTION,
809 sample->ip, al);
810 dump_printf(" ...... dso: %s\n",
811 al->map ? al->map->dso->long_name :
812 al->level == 'H' ? "[hypervisor]" : "<not found>");
813
814 if (thread__is_filtered(thread))
815 al->filtered |= (1 << HIST_FILTER__THREAD);
816
817 al->sym = NULL;
818 al->cpu = sample->cpu;
819
820 if (al->map) {
821 struct dso *dso = al->map->dso;
822
823 if (symbol_conf.dso_list &&
824 (!dso || !(strlist__has_entry(symbol_conf.dso_list,
825 dso->short_name) ||
826 (dso->short_name != dso->long_name &&
827 strlist__has_entry(symbol_conf.dso_list,
828 dso->long_name))))) {
829 al->filtered |= (1 << HIST_FILTER__DSO);
830 }
831
832 al->sym = map__find_symbol(al->map, al->addr,
833 machine->symbol_filter);
834 }
835
836 if (symbol_conf.sym_list &&
837 (!al->sym || !strlist__has_entry(symbol_conf.sym_list,
838 al->sym->name))) {
839 al->filtered |= (1 << HIST_FILTER__SYMBOL);
840 }
841
842 return 0;
843}