1
2#include <dirent.h>
3#include <errno.h>
4#include <inttypes.h>
5#include <regex.h>
6#include "callchain.h"
7#include "debug.h"
8#include "event.h"
9#include "evsel.h"
10#include "hist.h"
11#include "machine.h"
12#include "map.h"
13#include "symbol.h"
14#include "sort.h"
15#include "strlist.h"
16#include "thread.h"
17#include "vdso.h"
18#include <stdbool.h>
19#include <sys/types.h>
20#include <sys/stat.h>
21#include <unistd.h>
22#include "unwind.h"
23#include "linux/hash.h"
24#include "asm/bug.h"
25#include "bpf-event.h"
26
27#include "sane_ctype.h"
28#include <symbol/kallsyms.h>
29#include <linux/mman.h>
30
31static void __machine__remove_thread(struct machine *machine, struct thread *th, bool lock);
32
33static void dsos__init(struct dsos *dsos)
34{
35 INIT_LIST_HEAD(&dsos->head);
36 dsos->root = RB_ROOT;
37 init_rwsem(&dsos->lock);
38}
39
40static void machine__threads_init(struct machine *machine)
41{
42 int i;
43
44 for (i = 0; i < THREADS__TABLE_SIZE; i++) {
45 struct threads *threads = &machine->threads[i];
46 threads->entries = RB_ROOT_CACHED;
47 init_rwsem(&threads->lock);
48 threads->nr = 0;
49 INIT_LIST_HEAD(&threads->dead);
50 threads->last_match = NULL;
51 }
52}
53
54static int machine__set_mmap_name(struct machine *machine)
55{
56 if (machine__is_host(machine))
57 machine->mmap_name = strdup("[kernel.kallsyms]");
58 else if (machine__is_default_guest(machine))
59 machine->mmap_name = strdup("[guest.kernel.kallsyms]");
60 else if (asprintf(&machine->mmap_name, "[guest.kernel.kallsyms.%d]",
61 machine->pid) < 0)
62 machine->mmap_name = NULL;
63
64 return machine->mmap_name ? 0 : -ENOMEM;
65}
66
67int machine__init(struct machine *machine, const char *root_dir, pid_t pid)
68{
69 int err = -ENOMEM;
70
71 memset(machine, 0, sizeof(*machine));
72 map_groups__init(&machine->kmaps, machine);
73 RB_CLEAR_NODE(&machine->rb_node);
74 dsos__init(&machine->dsos);
75
76 machine__threads_init(machine);
77
78 machine->vdso_info = NULL;
79 machine->env = NULL;
80
81 machine->pid = pid;
82
83 machine->id_hdr_size = 0;
84 machine->kptr_restrict_warned = false;
85 machine->comm_exec = false;
86 machine->kernel_start = 0;
87 machine->vmlinux_map = NULL;
88
89 machine->root_dir = strdup(root_dir);
90 if (machine->root_dir == NULL)
91 return -ENOMEM;
92
93 if (machine__set_mmap_name(machine))
94 goto out;
95
96 if (pid != HOST_KERNEL_ID) {
97 struct thread *thread = machine__findnew_thread(machine, -1,
98 pid);
99 char comm[64];
100
101 if (thread == NULL)
102 goto out;
103
104 snprintf(comm, sizeof(comm), "[guest/%d]", pid);
105 thread__set_comm(thread, comm, 0);
106 thread__put(thread);
107 }
108
109 machine->current_tid = NULL;
110 err = 0;
111
112out:
113 if (err) {
114 zfree(&machine->root_dir);
115 zfree(&machine->mmap_name);
116 }
117 return 0;
118}
119
120struct machine *machine__new_host(void)
121{
122 struct machine *machine = malloc(sizeof(*machine));
123
124 if (machine != NULL) {
125 machine__init(machine, "", HOST_KERNEL_ID);
126
127 if (machine__create_kernel_maps(machine) < 0)
128 goto out_delete;
129 }
130
131 return machine;
132out_delete:
133 free(machine);
134 return NULL;
135}
136
137struct machine *machine__new_kallsyms(void)
138{
139 struct machine *machine = machine__new_host();
140
141
142
143
144
145
146 if (machine && machine__load_kallsyms(machine, "/proc/kallsyms") <= 0) {
147 machine__delete(machine);
148 machine = NULL;
149 }
150
151 return machine;
152}
153
154static void dsos__purge(struct dsos *dsos)
155{
156 struct dso *pos, *n;
157
158 down_write(&dsos->lock);
159
160 list_for_each_entry_safe(pos, n, &dsos->head, node) {
161 RB_CLEAR_NODE(&pos->rb_node);
162 pos->root = NULL;
163 list_del_init(&pos->node);
164 dso__put(pos);
165 }
166
167 up_write(&dsos->lock);
168}
169
170static void dsos__exit(struct dsos *dsos)
171{
172 dsos__purge(dsos);
173 exit_rwsem(&dsos->lock);
174}
175
176void machine__delete_threads(struct machine *machine)
177{
178 struct rb_node *nd;
179 int i;
180
181 for (i = 0; i < THREADS__TABLE_SIZE; i++) {
182 struct threads *threads = &machine->threads[i];
183 down_write(&threads->lock);
184 nd = rb_first_cached(&threads->entries);
185 while (nd) {
186 struct thread *t = rb_entry(nd, struct thread, rb_node);
187
188 nd = rb_next(nd);
189 __machine__remove_thread(machine, t, false);
190 }
191 up_write(&threads->lock);
192 }
193}
194
195void machine__exit(struct machine *machine)
196{
197 int i;
198
199 if (machine == NULL)
200 return;
201
202 machine__destroy_kernel_maps(machine);
203 map_groups__exit(&machine->kmaps);
204 dsos__exit(&machine->dsos);
205 machine__exit_vdso(machine);
206 zfree(&machine->root_dir);
207 zfree(&machine->mmap_name);
208 zfree(&machine->current_tid);
209
210 for (i = 0; i < THREADS__TABLE_SIZE; i++) {
211 struct threads *threads = &machine->threads[i];
212 exit_rwsem(&threads->lock);
213 }
214}
215
216void machine__delete(struct machine *machine)
217{
218 if (machine) {
219 machine__exit(machine);
220 free(machine);
221 }
222}
223
224void machines__init(struct machines *machines)
225{
226 machine__init(&machines->host, "", HOST_KERNEL_ID);
227 machines->guests = RB_ROOT_CACHED;
228}
229
230void machines__exit(struct machines *machines)
231{
232 machine__exit(&machines->host);
233
234}
235
236struct machine *machines__add(struct machines *machines, pid_t pid,
237 const char *root_dir)
238{
239 struct rb_node **p = &machines->guests.rb_root.rb_node;
240 struct rb_node *parent = NULL;
241 struct machine *pos, *machine = malloc(sizeof(*machine));
242 bool leftmost = true;
243
244 if (machine == NULL)
245 return NULL;
246
247 if (machine__init(machine, root_dir, pid) != 0) {
248 free(machine);
249 return NULL;
250 }
251
252 while (*p != NULL) {
253 parent = *p;
254 pos = rb_entry(parent, struct machine, rb_node);
255 if (pid < pos->pid)
256 p = &(*p)->rb_left;
257 else {
258 p = &(*p)->rb_right;
259 leftmost = false;
260 }
261 }
262
263 rb_link_node(&machine->rb_node, parent, p);
264 rb_insert_color_cached(&machine->rb_node, &machines->guests, leftmost);
265
266 return machine;
267}
268
269void machines__set_comm_exec(struct machines *machines, bool comm_exec)
270{
271 struct rb_node *nd;
272
273 machines->host.comm_exec = comm_exec;
274
275 for (nd = rb_first_cached(&machines->guests); nd; nd = rb_next(nd)) {
276 struct machine *machine = rb_entry(nd, struct machine, rb_node);
277
278 machine->comm_exec = comm_exec;
279 }
280}
281
282struct machine *machines__find(struct machines *machines, pid_t pid)
283{
284 struct rb_node **p = &machines->guests.rb_root.rb_node;
285 struct rb_node *parent = NULL;
286 struct machine *machine;
287 struct machine *default_machine = NULL;
288
289 if (pid == HOST_KERNEL_ID)
290 return &machines->host;
291
292 while (*p != NULL) {
293 parent = *p;
294 machine = rb_entry(parent, struct machine, rb_node);
295 if (pid < machine->pid)
296 p = &(*p)->rb_left;
297 else if (pid > machine->pid)
298 p = &(*p)->rb_right;
299 else
300 return machine;
301 if (!machine->pid)
302 default_machine = machine;
303 }
304
305 return default_machine;
306}
307
308struct machine *machines__findnew(struct machines *machines, pid_t pid)
309{
310 char path[PATH_MAX];
311 const char *root_dir = "";
312 struct machine *machine = machines__find(machines, pid);
313
314 if (machine && (machine->pid == pid))
315 goto out;
316
317 if ((pid != HOST_KERNEL_ID) &&
318 (pid != DEFAULT_GUEST_KERNEL_ID) &&
319 (symbol_conf.guestmount)) {
320 sprintf(path, "%s/%d", symbol_conf.guestmount, pid);
321 if (access(path, R_OK)) {
322 static struct strlist *seen;
323
324 if (!seen)
325 seen = strlist__new(NULL, NULL);
326
327 if (!strlist__has_entry(seen, path)) {
328 pr_err("Can't access file %s\n", path);
329 strlist__add(seen, path);
330 }
331 machine = NULL;
332 goto out;
333 }
334 root_dir = path;
335 }
336
337 machine = machines__add(machines, pid, root_dir);
338out:
339 return machine;
340}
341
342void machines__process_guests(struct machines *machines,
343 machine__process_t process, void *data)
344{
345 struct rb_node *nd;
346
347 for (nd = rb_first_cached(&machines->guests); nd; nd = rb_next(nd)) {
348 struct machine *pos = rb_entry(nd, struct machine, rb_node);
349 process(pos, data);
350 }
351}
352
353void machines__set_id_hdr_size(struct machines *machines, u16 id_hdr_size)
354{
355 struct rb_node *node;
356 struct machine *machine;
357
358 machines->host.id_hdr_size = id_hdr_size;
359
360 for (node = rb_first_cached(&machines->guests); node;
361 node = rb_next(node)) {
362 machine = rb_entry(node, struct machine, rb_node);
363 machine->id_hdr_size = id_hdr_size;
364 }
365
366 return;
367}
368
369static void machine__update_thread_pid(struct machine *machine,
370 struct thread *th, pid_t pid)
371{
372 struct thread *leader;
373
374 if (pid == th->pid_ || pid == -1 || th->pid_ != -1)
375 return;
376
377 th->pid_ = pid;
378
379 if (th->pid_ == th->tid)
380 return;
381
382 leader = __machine__findnew_thread(machine, th->pid_, th->pid_);
383 if (!leader)
384 goto out_err;
385
386 if (!leader->mg)
387 leader->mg = map_groups__new(machine);
388
389 if (!leader->mg)
390 goto out_err;
391
392 if (th->mg == leader->mg)
393 return;
394
395 if (th->mg) {
396
397
398
399
400
401 if (!map_groups__empty(th->mg))
402 pr_err("Discarding thread maps for %d:%d\n",
403 th->pid_, th->tid);
404 map_groups__put(th->mg);
405 }
406
407 th->mg = map_groups__get(leader->mg);
408out_put:
409 thread__put(leader);
410 return;
411out_err:
412 pr_err("Failed to join map groups for %d:%d\n", th->pid_, th->tid);
413 goto out_put;
414}
415
416
417
418
419
420
421static struct thread*
422__threads__get_last_match(struct threads *threads, struct machine *machine,
423 int pid, int tid)
424{
425 struct thread *th;
426
427 th = threads->last_match;
428 if (th != NULL) {
429 if (th->tid == tid) {
430 machine__update_thread_pid(machine, th, pid);
431 return thread__get(th);
432 }
433
434 threads->last_match = NULL;
435 }
436
437 return NULL;
438}
439
440static struct thread*
441threads__get_last_match(struct threads *threads, struct machine *machine,
442 int pid, int tid)
443{
444 struct thread *th = NULL;
445
446 if (perf_singlethreaded)
447 th = __threads__get_last_match(threads, machine, pid, tid);
448
449 return th;
450}
451
452static void
453__threads__set_last_match(struct threads *threads, struct thread *th)
454{
455 threads->last_match = th;
456}
457
458static void
459threads__set_last_match(struct threads *threads, struct thread *th)
460{
461 if (perf_singlethreaded)
462 __threads__set_last_match(threads, th);
463}
464
465
466
467
468
469static struct thread *____machine__findnew_thread(struct machine *machine,
470 struct threads *threads,
471 pid_t pid, pid_t tid,
472 bool create)
473{
474 struct rb_node **p = &threads->entries.rb_root.rb_node;
475 struct rb_node *parent = NULL;
476 struct thread *th;
477 bool leftmost = true;
478
479 th = threads__get_last_match(threads, machine, pid, tid);
480 if (th)
481 return th;
482
483 while (*p != NULL) {
484 parent = *p;
485 th = rb_entry(parent, struct thread, rb_node);
486
487 if (th->tid == tid) {
488 threads__set_last_match(threads, th);
489 machine__update_thread_pid(machine, th, pid);
490 return thread__get(th);
491 }
492
493 if (tid < th->tid)
494 p = &(*p)->rb_left;
495 else {
496 p = &(*p)->rb_right;
497 leftmost = false;
498 }
499 }
500
501 if (!create)
502 return NULL;
503
504 th = thread__new(pid, tid);
505 if (th != NULL) {
506 rb_link_node(&th->rb_node, parent, p);
507 rb_insert_color_cached(&th->rb_node, &threads->entries, leftmost);
508
509
510
511
512
513
514
515
516
517 if (thread__init_map_groups(th, machine)) {
518 rb_erase_cached(&th->rb_node, &threads->entries);
519 RB_CLEAR_NODE(&th->rb_node);
520 thread__put(th);
521 return NULL;
522 }
523
524
525
526 thread__get(th);
527 threads__set_last_match(threads, th);
528 ++threads->nr;
529 }
530
531 return th;
532}
533
534struct thread *__machine__findnew_thread(struct machine *machine, pid_t pid, pid_t tid)
535{
536 return ____machine__findnew_thread(machine, machine__threads(machine, tid), pid, tid, true);
537}
538
539struct thread *machine__findnew_thread(struct machine *machine, pid_t pid,
540 pid_t tid)
541{
542 struct threads *threads = machine__threads(machine, tid);
543 struct thread *th;
544
545 down_write(&threads->lock);
546 th = __machine__findnew_thread(machine, pid, tid);
547 up_write(&threads->lock);
548 return th;
549}
550
551struct thread *machine__find_thread(struct machine *machine, pid_t pid,
552 pid_t tid)
553{
554 struct threads *threads = machine__threads(machine, tid);
555 struct thread *th;
556
557 down_read(&threads->lock);
558 th = ____machine__findnew_thread(machine, threads, pid, tid, false);
559 up_read(&threads->lock);
560 return th;
561}
562
563struct comm *machine__thread_exec_comm(struct machine *machine,
564 struct thread *thread)
565{
566 if (machine->comm_exec)
567 return thread__exec_comm(thread);
568 else
569 return thread__comm(thread);
570}
571
572int machine__process_comm_event(struct machine *machine, union perf_event *event,
573 struct perf_sample *sample)
574{
575 struct thread *thread = machine__findnew_thread(machine,
576 event->comm.pid,
577 event->comm.tid);
578 bool exec = event->header.misc & PERF_RECORD_MISC_COMM_EXEC;
579 int err = 0;
580
581 if (exec)
582 machine->comm_exec = true;
583
584 if (dump_trace)
585 perf_event__fprintf_comm(event, stdout);
586
587 if (thread == NULL ||
588 __thread__set_comm(thread, event->comm.comm, sample->time, exec)) {
589 dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n");
590 err = -1;
591 }
592
593 thread__put(thread);
594
595 return err;
596}
597
598int machine__process_namespaces_event(struct machine *machine __maybe_unused,
599 union perf_event *event,
600 struct perf_sample *sample __maybe_unused)
601{
602 struct thread *thread = machine__findnew_thread(machine,
603 event->namespaces.pid,
604 event->namespaces.tid);
605 int err = 0;
606
607 WARN_ONCE(event->namespaces.nr_namespaces > NR_NAMESPACES,
608 "\nWARNING: kernel seems to support more namespaces than perf"
609 " tool.\nTry updating the perf tool..\n\n");
610
611 WARN_ONCE(event->namespaces.nr_namespaces < NR_NAMESPACES,
612 "\nWARNING: perf tool seems to support more namespaces than"
613 " the kernel.\nTry updating the kernel..\n\n");
614
615 if (dump_trace)
616 perf_event__fprintf_namespaces(event, stdout);
617
618 if (thread == NULL ||
619 thread__set_namespaces(thread, sample->time, &event->namespaces)) {
620 dump_printf("problem processing PERF_RECORD_NAMESPACES, skipping event.\n");
621 err = -1;
622 }
623
624 thread__put(thread);
625
626 return err;
627}
628
629int machine__process_lost_event(struct machine *machine __maybe_unused,
630 union perf_event *event, struct perf_sample *sample __maybe_unused)
631{
632 dump_printf(": id:%" PRIu64 ": lost:%" PRIu64 "\n",
633 event->lost.id, event->lost.lost);
634 return 0;
635}
636
637int machine__process_lost_samples_event(struct machine *machine __maybe_unused,
638 union perf_event *event, struct perf_sample *sample)
639{
640 dump_printf(": id:%" PRIu64 ": lost samples :%" PRIu64 "\n",
641 sample->id, event->lost_samples.lost);
642 return 0;
643}
644
645static struct dso *machine__findnew_module_dso(struct machine *machine,
646 struct kmod_path *m,
647 const char *filename)
648{
649 struct dso *dso;
650
651 down_write(&machine->dsos.lock);
652
653 dso = __dsos__find(&machine->dsos, m->name, true);
654 if (!dso) {
655 dso = __dsos__addnew(&machine->dsos, m->name);
656 if (dso == NULL)
657 goto out_unlock;
658
659 dso__set_module_info(dso, m, machine);
660 dso__set_long_name(dso, strdup(filename), true);
661 }
662
663 dso__get(dso);
664out_unlock:
665 up_write(&machine->dsos.lock);
666 return dso;
667}
668
669int machine__process_aux_event(struct machine *machine __maybe_unused,
670 union perf_event *event)
671{
672 if (dump_trace)
673 perf_event__fprintf_aux(event, stdout);
674 return 0;
675}
676
677int machine__process_itrace_start_event(struct machine *machine __maybe_unused,
678 union perf_event *event)
679{
680 if (dump_trace)
681 perf_event__fprintf_itrace_start(event, stdout);
682 return 0;
683}
684
685int machine__process_switch_event(struct machine *machine __maybe_unused,
686 union perf_event *event)
687{
688 if (dump_trace)
689 perf_event__fprintf_switch(event, stdout);
690 return 0;
691}
692
693static int machine__process_ksymbol_register(struct machine *machine,
694 union perf_event *event,
695 struct perf_sample *sample __maybe_unused)
696{
697 struct symbol *sym;
698 struct map *map;
699
700 map = map_groups__find(&machine->kmaps, event->ksymbol_event.addr);
701 if (!map) {
702 map = dso__new_map(event->ksymbol_event.name);
703 if (!map)
704 return -ENOMEM;
705
706 map->start = event->ksymbol_event.addr;
707 map->pgoff = map->start;
708 map->end = map->start + event->ksymbol_event.len;
709 map_groups__insert(&machine->kmaps, map);
710 }
711
712 sym = symbol__new(event->ksymbol_event.addr, event->ksymbol_event.len,
713 0, 0, event->ksymbol_event.name);
714 if (!sym)
715 return -ENOMEM;
716 dso__insert_symbol(map->dso, sym);
717 return 0;
718}
719
720static int machine__process_ksymbol_unregister(struct machine *machine,
721 union perf_event *event,
722 struct perf_sample *sample __maybe_unused)
723{
724 struct map *map;
725
726 map = map_groups__find(&machine->kmaps, event->ksymbol_event.addr);
727 if (map)
728 map_groups__remove(&machine->kmaps, map);
729
730 return 0;
731}
732
733int machine__process_ksymbol(struct machine *machine __maybe_unused,
734 union perf_event *event,
735 struct perf_sample *sample)
736{
737 if (dump_trace)
738 perf_event__fprintf_ksymbol(event, stdout);
739
740 if (event->ksymbol_event.flags & PERF_RECORD_KSYMBOL_FLAGS_UNREGISTER)
741 return machine__process_ksymbol_unregister(machine, event,
742 sample);
743 return machine__process_ksymbol_register(machine, event, sample);
744}
745
746static void dso__adjust_kmod_long_name(struct dso *dso, const char *filename)
747{
748 const char *dup_filename;
749
750 if (!filename || !dso || !dso->long_name)
751 return;
752 if (dso->long_name[0] != '[')
753 return;
754 if (!strchr(filename, '/'))
755 return;
756
757 dup_filename = strdup(filename);
758 if (!dup_filename)
759 return;
760
761 dso__set_long_name(dso, dup_filename, true);
762}
763
764struct map *machine__findnew_module_map(struct machine *machine, u64 start,
765 const char *filename)
766{
767 struct map *map = NULL;
768 struct dso *dso = NULL;
769 struct kmod_path m;
770
771 if (kmod_path__parse_name(&m, filename))
772 return NULL;
773
774 map = map_groups__find_by_name(&machine->kmaps, m.name);
775 if (map) {
776
777
778
779
780
781 dso__adjust_kmod_long_name(map->dso, filename);
782 goto out;
783 }
784
785 dso = machine__findnew_module_dso(machine, &m, filename);
786 if (dso == NULL)
787 goto out;
788
789 map = map__new2(start, dso);
790 if (map == NULL)
791 goto out;
792
793 map_groups__insert(&machine->kmaps, map);
794
795
796 map__put(map);
797out:
798
799 dso__put(dso);
800 free(m.name);
801 return map;
802}
803
804size_t machines__fprintf_dsos(struct machines *machines, FILE *fp)
805{
806 struct rb_node *nd;
807 size_t ret = __dsos__fprintf(&machines->host.dsos.head, fp);
808
809 for (nd = rb_first_cached(&machines->guests); nd; nd = rb_next(nd)) {
810 struct machine *pos = rb_entry(nd, struct machine, rb_node);
811 ret += __dsos__fprintf(&pos->dsos.head, fp);
812 }
813
814 return ret;
815}
816
817size_t machine__fprintf_dsos_buildid(struct machine *m, FILE *fp,
818 bool (skip)(struct dso *dso, int parm), int parm)
819{
820 return __dsos__fprintf_buildid(&m->dsos.head, fp, skip, parm);
821}
822
823size_t machines__fprintf_dsos_buildid(struct machines *machines, FILE *fp,
824 bool (skip)(struct dso *dso, int parm), int parm)
825{
826 struct rb_node *nd;
827 size_t ret = machine__fprintf_dsos_buildid(&machines->host, fp, skip, parm);
828
829 for (nd = rb_first_cached(&machines->guests); nd; nd = rb_next(nd)) {
830 struct machine *pos = rb_entry(nd, struct machine, rb_node);
831 ret += machine__fprintf_dsos_buildid(pos, fp, skip, parm);
832 }
833 return ret;
834}
835
836size_t machine__fprintf_vmlinux_path(struct machine *machine, FILE *fp)
837{
838 int i;
839 size_t printed = 0;
840 struct dso *kdso = machine__kernel_map(machine)->dso;
841
842 if (kdso->has_build_id) {
843 char filename[PATH_MAX];
844 if (dso__build_id_filename(kdso, filename, sizeof(filename),
845 false))
846 printed += fprintf(fp, "[0] %s\n", filename);
847 }
848
849 for (i = 0; i < vmlinux_path__nr_entries; ++i)
850 printed += fprintf(fp, "[%d] %s\n",
851 i + kdso->has_build_id, vmlinux_path[i]);
852
853 return printed;
854}
855
856size_t machine__fprintf(struct machine *machine, FILE *fp)
857{
858 struct rb_node *nd;
859 size_t ret;
860 int i;
861
862 for (i = 0; i < THREADS__TABLE_SIZE; i++) {
863 struct threads *threads = &machine->threads[i];
864
865 down_read(&threads->lock);
866
867 ret = fprintf(fp, "Threads: %u\n", threads->nr);
868
869 for (nd = rb_first_cached(&threads->entries); nd;
870 nd = rb_next(nd)) {
871 struct thread *pos = rb_entry(nd, struct thread, rb_node);
872
873 ret += thread__fprintf(pos, fp);
874 }
875
876 up_read(&threads->lock);
877 }
878 return ret;
879}
880
881static struct dso *machine__get_kernel(struct machine *machine)
882{
883 const char *vmlinux_name = machine->mmap_name;
884 struct dso *kernel;
885
886 if (machine__is_host(machine)) {
887 if (symbol_conf.vmlinux_name)
888 vmlinux_name = symbol_conf.vmlinux_name;
889
890 kernel = machine__findnew_kernel(machine, vmlinux_name,
891 "[kernel]", DSO_TYPE_KERNEL);
892 } else {
893 if (symbol_conf.default_guest_vmlinux_name)
894 vmlinux_name = symbol_conf.default_guest_vmlinux_name;
895
896 kernel = machine__findnew_kernel(machine, vmlinux_name,
897 "[guest.kernel]",
898 DSO_TYPE_GUEST_KERNEL);
899 }
900
901 if (kernel != NULL && (!kernel->has_build_id))
902 dso__read_running_kernel_build_id(kernel, machine);
903
904 return kernel;
905}
906
907struct process_args {
908 u64 start;
909};
910
911void machine__get_kallsyms_filename(struct machine *machine, char *buf,
912 size_t bufsz)
913{
914 if (machine__is_default_guest(machine))
915 scnprintf(buf, bufsz, "%s", symbol_conf.default_guest_kallsyms);
916 else
917 scnprintf(buf, bufsz, "%s/proc/kallsyms", machine->root_dir);
918}
919
920const char *ref_reloc_sym_names[] = {"_text", "_stext", NULL};
921
922
923
924
925
926static int machine__get_running_kernel_start(struct machine *machine,
927 const char **symbol_name,
928 u64 *start, u64 *end)
929{
930 char filename[PATH_MAX];
931 int i, err = -1;
932 const char *name;
933 u64 addr = 0;
934
935 machine__get_kallsyms_filename(machine, filename, PATH_MAX);
936
937 if (symbol__restricted_filename(filename, "/proc/kallsyms"))
938 return 0;
939
940 for (i = 0; (name = ref_reloc_sym_names[i]) != NULL; i++) {
941 err = kallsyms__get_function_start(filename, name, &addr);
942 if (!err)
943 break;
944 }
945
946 if (err)
947 return -1;
948
949 if (symbol_name)
950 *symbol_name = name;
951
952 *start = addr;
953
954 err = kallsyms__get_function_start(filename, "_etext", &addr);
955 if (!err)
956 *end = addr;
957
958 return 0;
959}
960
961int machine__create_extra_kernel_map(struct machine *machine,
962 struct dso *kernel,
963 struct extra_kernel_map *xm)
964{
965 struct kmap *kmap;
966 struct map *map;
967
968 map = map__new2(xm->start, kernel);
969 if (!map)
970 return -1;
971
972 map->end = xm->end;
973 map->pgoff = xm->pgoff;
974
975 kmap = map__kmap(map);
976
977 kmap->kmaps = &machine->kmaps;
978 strlcpy(kmap->name, xm->name, KMAP_NAME_LEN);
979
980 map_groups__insert(&machine->kmaps, map);
981
982 pr_debug2("Added extra kernel map %s %" PRIx64 "-%" PRIx64 "\n",
983 kmap->name, map->start, map->end);
984
985 map__put(map);
986
987 return 0;
988}
989
990static u64 find_entry_trampoline(struct dso *dso)
991{
992
993 const char *syms[] = {
994 "_entry_trampoline",
995 "__entry_trampoline_start",
996 "entry_SYSCALL_64_trampoline",
997 };
998 struct symbol *sym = dso__first_symbol(dso);
999 unsigned int i;
1000
1001 for (; sym; sym = dso__next_symbol(sym)) {
1002 if (sym->binding != STB_GLOBAL)
1003 continue;
1004 for (i = 0; i < ARRAY_SIZE(syms); i++) {
1005 if (!strcmp(sym->name, syms[i]))
1006 return sym->start;
1007 }
1008 }
1009
1010 return 0;
1011}
1012
1013
1014
1015
1016
1017#define X86_64_CPU_ENTRY_AREA_PER_CPU 0xfffffe0000000000ULL
1018#define X86_64_CPU_ENTRY_AREA_SIZE 0x2c000
1019#define X86_64_ENTRY_TRAMPOLINE 0x6000
1020
1021
1022int machine__map_x86_64_entry_trampolines(struct machine *machine,
1023 struct dso *kernel)
1024{
1025 struct map_groups *kmaps = &machine->kmaps;
1026 struct maps *maps = &kmaps->maps;
1027 int nr_cpus_avail, cpu;
1028 bool found = false;
1029 struct map *map;
1030 u64 pgoff;
1031
1032
1033
1034
1035
1036 for (map = maps__first(maps); map; map = map__next(map)) {
1037 struct kmap *kmap = __map__kmap(map);
1038 struct map *dest_map;
1039
1040 if (!kmap || !is_entry_trampoline(kmap->name))
1041 continue;
1042
1043 dest_map = map_groups__find(kmaps, map->pgoff);
1044 if (dest_map != map)
1045 map->pgoff = dest_map->map_ip(dest_map, map->pgoff);
1046 found = true;
1047 }
1048 if (found || machine->trampolines_mapped)
1049 return 0;
1050
1051 pgoff = find_entry_trampoline(kernel);
1052 if (!pgoff)
1053 return 0;
1054
1055 nr_cpus_avail = machine__nr_cpus_avail(machine);
1056
1057
1058 for (cpu = 0; cpu < nr_cpus_avail; cpu++) {
1059 u64 va = X86_64_CPU_ENTRY_AREA_PER_CPU +
1060 cpu * X86_64_CPU_ENTRY_AREA_SIZE +
1061 X86_64_ENTRY_TRAMPOLINE;
1062 struct extra_kernel_map xm = {
1063 .start = va,
1064 .end = va + page_size,
1065 .pgoff = pgoff,
1066 };
1067
1068 strlcpy(xm.name, ENTRY_TRAMPOLINE_NAME, KMAP_NAME_LEN);
1069
1070 if (machine__create_extra_kernel_map(machine, kernel, &xm) < 0)
1071 return -1;
1072 }
1073
1074 machine->trampolines_mapped = nr_cpus_avail;
1075
1076 return 0;
1077}
1078
1079int __weak machine__create_extra_kernel_maps(struct machine *machine __maybe_unused,
1080 struct dso *kernel __maybe_unused)
1081{
1082 return 0;
1083}
1084
1085static int
1086__machine__create_kernel_maps(struct machine *machine, struct dso *kernel)
1087{
1088 struct kmap *kmap;
1089 struct map *map;
1090
1091
1092 machine__destroy_kernel_maps(machine);
1093
1094 machine->vmlinux_map = map__new2(0, kernel);
1095 if (machine->vmlinux_map == NULL)
1096 return -1;
1097
1098 machine->vmlinux_map->map_ip = machine->vmlinux_map->unmap_ip = identity__map_ip;
1099 map = machine__kernel_map(machine);
1100 kmap = map__kmap(map);
1101 if (!kmap)
1102 return -1;
1103
1104 kmap->kmaps = &machine->kmaps;
1105 map_groups__insert(&machine->kmaps, map);
1106
1107 return 0;
1108}
1109
1110void machine__destroy_kernel_maps(struct machine *machine)
1111{
1112 struct kmap *kmap;
1113 struct map *map = machine__kernel_map(machine);
1114
1115 if (map == NULL)
1116 return;
1117
1118 kmap = map__kmap(map);
1119 map_groups__remove(&machine->kmaps, map);
1120 if (kmap && kmap->ref_reloc_sym) {
1121 zfree((char **)&kmap->ref_reloc_sym->name);
1122 zfree(&kmap->ref_reloc_sym);
1123 }
1124
1125 map__zput(machine->vmlinux_map);
1126}
1127
1128int machines__create_guest_kernel_maps(struct machines *machines)
1129{
1130 int ret = 0;
1131 struct dirent **namelist = NULL;
1132 int i, items = 0;
1133 char path[PATH_MAX];
1134 pid_t pid;
1135 char *endp;
1136
1137 if (symbol_conf.default_guest_vmlinux_name ||
1138 symbol_conf.default_guest_modules ||
1139 symbol_conf.default_guest_kallsyms) {
1140 machines__create_kernel_maps(machines, DEFAULT_GUEST_KERNEL_ID);
1141 }
1142
1143 if (symbol_conf.guestmount) {
1144 items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL);
1145 if (items <= 0)
1146 return -ENOENT;
1147 for (i = 0; i < items; i++) {
1148 if (!isdigit(namelist[i]->d_name[0])) {
1149
1150 continue;
1151 }
1152 pid = (pid_t)strtol(namelist[i]->d_name, &endp, 10);
1153 if ((*endp != '\0') ||
1154 (endp == namelist[i]->d_name) ||
1155 (errno == ERANGE)) {
1156 pr_debug("invalid directory (%s). Skipping.\n",
1157 namelist[i]->d_name);
1158 continue;
1159 }
1160 sprintf(path, "%s/%s/proc/kallsyms",
1161 symbol_conf.guestmount,
1162 namelist[i]->d_name);
1163 ret = access(path, R_OK);
1164 if (ret) {
1165 pr_debug("Can't access file %s\n", path);
1166 goto failure;
1167 }
1168 machines__create_kernel_maps(machines, pid);
1169 }
1170failure:
1171 free(namelist);
1172 }
1173
1174 return ret;
1175}
1176
1177void machines__destroy_kernel_maps(struct machines *machines)
1178{
1179 struct rb_node *next = rb_first_cached(&machines->guests);
1180
1181 machine__destroy_kernel_maps(&machines->host);
1182
1183 while (next) {
1184 struct machine *pos = rb_entry(next, struct machine, rb_node);
1185
1186 next = rb_next(&pos->rb_node);
1187 rb_erase_cached(&pos->rb_node, &machines->guests);
1188 machine__delete(pos);
1189 }
1190}
1191
1192int machines__create_kernel_maps(struct machines *machines, pid_t pid)
1193{
1194 struct machine *machine = machines__findnew(machines, pid);
1195
1196 if (machine == NULL)
1197 return -1;
1198
1199 return machine__create_kernel_maps(machine);
1200}
1201
1202int machine__load_kallsyms(struct machine *machine, const char *filename)
1203{
1204 struct map *map = machine__kernel_map(machine);
1205 int ret = __dso__load_kallsyms(map->dso, filename, map, true);
1206
1207 if (ret > 0) {
1208 dso__set_loaded(map->dso);
1209
1210
1211
1212
1213
1214 map_groups__fixup_end(&machine->kmaps);
1215 }
1216
1217 return ret;
1218}
1219
1220int machine__load_vmlinux_path(struct machine *machine)
1221{
1222 struct map *map = machine__kernel_map(machine);
1223 int ret = dso__load_vmlinux_path(map->dso, map);
1224
1225 if (ret > 0)
1226 dso__set_loaded(map->dso);
1227
1228 return ret;
1229}
1230
1231static char *get_kernel_version(const char *root_dir)
1232{
1233 char version[PATH_MAX];
1234 FILE *file;
1235 char *name, *tmp;
1236 const char *prefix = "Linux version ";
1237
1238 sprintf(version, "%s/proc/version", root_dir);
1239 file = fopen(version, "r");
1240 if (!file)
1241 return NULL;
1242
1243 tmp = fgets(version, sizeof(version), file);
1244 if (!tmp)
1245 *version = '\0';
1246 fclose(file);
1247
1248 name = strstr(version, prefix);
1249 if (!name)
1250 return NULL;
1251 name += strlen(prefix);
1252 tmp = strchr(name, ' ');
1253 if (tmp)
1254 *tmp = '\0';
1255
1256 return strdup(name);
1257}
1258
1259static bool is_kmod_dso(struct dso *dso)
1260{
1261 return dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE ||
1262 dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE;
1263}
1264
1265static int map_groups__set_module_path(struct map_groups *mg, const char *path,
1266 struct kmod_path *m)
1267{
1268 char *long_name;
1269 struct map *map = map_groups__find_by_name(mg, m->name);
1270
1271 if (map == NULL)
1272 return 0;
1273
1274 long_name = strdup(path);
1275 if (long_name == NULL)
1276 return -ENOMEM;
1277
1278 dso__set_long_name(map->dso, long_name, true);
1279 dso__kernel_module_get_build_id(map->dso, "");
1280
1281
1282
1283
1284
1285 if (m->comp && is_kmod_dso(map->dso)) {
1286 map->dso->symtab_type++;
1287 map->dso->comp = m->comp;
1288 }
1289
1290 return 0;
1291}
1292
1293static int map_groups__set_modules_path_dir(struct map_groups *mg,
1294 const char *dir_name, int depth)
1295{
1296 struct dirent *dent;
1297 DIR *dir = opendir(dir_name);
1298 int ret = 0;
1299
1300 if (!dir) {
1301 pr_debug("%s: cannot open %s dir\n", __func__, dir_name);
1302 return -1;
1303 }
1304
1305 while ((dent = readdir(dir)) != NULL) {
1306 char path[PATH_MAX];
1307 struct stat st;
1308
1309
1310 snprintf(path, sizeof(path), "%s/%s", dir_name, dent->d_name);
1311 if (stat(path, &st))
1312 continue;
1313
1314 if (S_ISDIR(st.st_mode)) {
1315 if (!strcmp(dent->d_name, ".") ||
1316 !strcmp(dent->d_name, ".."))
1317 continue;
1318
1319
1320 if (depth == 0) {
1321 if (!strcmp(dent->d_name, "source") ||
1322 !strcmp(dent->d_name, "build"))
1323 continue;
1324 }
1325
1326 ret = map_groups__set_modules_path_dir(mg, path,
1327 depth + 1);
1328 if (ret < 0)
1329 goto out;
1330 } else {
1331 struct kmod_path m;
1332
1333 ret = kmod_path__parse_name(&m, dent->d_name);
1334 if (ret)
1335 goto out;
1336
1337 if (m.kmod)
1338 ret = map_groups__set_module_path(mg, path, &m);
1339
1340 free(m.name);
1341
1342 if (ret)
1343 goto out;
1344 }
1345 }
1346
1347out:
1348 closedir(dir);
1349 return ret;
1350}
1351
1352static int machine__set_modules_path(struct machine *machine)
1353{
1354 char *version;
1355 char modules_path[PATH_MAX];
1356
1357 version = get_kernel_version(machine->root_dir);
1358 if (!version)
1359 return -1;
1360
1361 snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s",
1362 machine->root_dir, version);
1363 free(version);
1364
1365 return map_groups__set_modules_path_dir(&machine->kmaps, modules_path, 0);
1366}
1367int __weak arch__fix_module_text_start(u64 *start __maybe_unused,
1368 const char *name __maybe_unused)
1369{
1370 return 0;
1371}
1372
1373static int machine__create_module(void *arg, const char *name, u64 start,
1374 u64 size)
1375{
1376 struct machine *machine = arg;
1377 struct map *map;
1378
1379 if (arch__fix_module_text_start(&start, name) < 0)
1380 return -1;
1381
1382 map = machine__findnew_module_map(machine, start, name);
1383 if (map == NULL)
1384 return -1;
1385 map->end = start + size;
1386
1387 dso__kernel_module_get_build_id(map->dso, machine->root_dir);
1388
1389 return 0;
1390}
1391
1392static int machine__create_modules(struct machine *machine)
1393{
1394 const char *modules;
1395 char path[PATH_MAX];
1396
1397 if (machine__is_default_guest(machine)) {
1398 modules = symbol_conf.default_guest_modules;
1399 } else {
1400 snprintf(path, PATH_MAX, "%s/proc/modules", machine->root_dir);
1401 modules = path;
1402 }
1403
1404 if (symbol__restricted_filename(modules, "/proc/modules"))
1405 return -1;
1406
1407 if (modules__parse(modules, machine, machine__create_module))
1408 return -1;
1409
1410 if (!machine__set_modules_path(machine))
1411 return 0;
1412
1413 pr_debug("Problems setting modules path maps, continuing anyway...\n");
1414
1415 return 0;
1416}
1417
1418static void machine__set_kernel_mmap(struct machine *machine,
1419 u64 start, u64 end)
1420{
1421 machine->vmlinux_map->start = start;
1422 machine->vmlinux_map->end = end;
1423
1424
1425
1426
1427 if (start == 0 && end == 0)
1428 machine->vmlinux_map->end = ~0ULL;
1429}
1430
1431static void machine__update_kernel_mmap(struct machine *machine,
1432 u64 start, u64 end)
1433{
1434 struct map *map = machine__kernel_map(machine);
1435
1436 map__get(map);
1437 map_groups__remove(&machine->kmaps, map);
1438
1439 machine__set_kernel_mmap(machine, start, end);
1440
1441 map_groups__insert(&machine->kmaps, map);
1442 map__put(map);
1443}
1444
1445int machine__create_kernel_maps(struct machine *machine)
1446{
1447 struct dso *kernel = machine__get_kernel(machine);
1448 const char *name = NULL;
1449 struct map *map;
1450 u64 start = 0, end = ~0ULL;
1451 int ret;
1452
1453 if (kernel == NULL)
1454 return -1;
1455
1456 ret = __machine__create_kernel_maps(machine, kernel);
1457 if (ret < 0)
1458 goto out_put;
1459
1460 if (symbol_conf.use_modules && machine__create_modules(machine) < 0) {
1461 if (machine__is_host(machine))
1462 pr_debug("Problems creating module maps, "
1463 "continuing anyway...\n");
1464 else
1465 pr_debug("Problems creating module maps for guest %d, "
1466 "continuing anyway...\n", machine->pid);
1467 }
1468
1469 if (!machine__get_running_kernel_start(machine, &name, &start, &end)) {
1470 if (name &&
1471 map__set_kallsyms_ref_reloc_sym(machine->vmlinux_map, name, start)) {
1472 machine__destroy_kernel_maps(machine);
1473 ret = -1;
1474 goto out_put;
1475 }
1476
1477
1478
1479
1480
1481 machine__update_kernel_mmap(machine, start, end);
1482 }
1483
1484 if (machine__create_extra_kernel_maps(machine, kernel))
1485 pr_debug("Problems creating extra kernel maps, continuing anyway...\n");
1486
1487 if (end == ~0ULL) {
1488
1489 map = map__next(machine__kernel_map(machine));
1490 if (map)
1491 machine__set_kernel_mmap(machine, start, map->start);
1492 }
1493
1494out_put:
1495 dso__put(kernel);
1496 return ret;
1497}
1498
1499static bool machine__uses_kcore(struct machine *machine)
1500{
1501 struct dso *dso;
1502
1503 list_for_each_entry(dso, &machine->dsos.head, node) {
1504 if (dso__is_kcore(dso))
1505 return true;
1506 }
1507
1508 return false;
1509}
1510
1511static bool perf_event__is_extra_kernel_mmap(struct machine *machine,
1512 union perf_event *event)
1513{
1514 return machine__is(machine, "x86_64") &&
1515 is_entry_trampoline(event->mmap.filename);
1516}
1517
1518static int machine__process_extra_kernel_map(struct machine *machine,
1519 union perf_event *event)
1520{
1521 struct map *kernel_map = machine__kernel_map(machine);
1522 struct dso *kernel = kernel_map ? kernel_map->dso : NULL;
1523 struct extra_kernel_map xm = {
1524 .start = event->mmap.start,
1525 .end = event->mmap.start + event->mmap.len,
1526 .pgoff = event->mmap.pgoff,
1527 };
1528
1529 if (kernel == NULL)
1530 return -1;
1531
1532 strlcpy(xm.name, event->mmap.filename, KMAP_NAME_LEN);
1533
1534 return machine__create_extra_kernel_map(machine, kernel, &xm);
1535}
1536
1537static int machine__process_kernel_mmap_event(struct machine *machine,
1538 union perf_event *event)
1539{
1540 struct map *map;
1541 enum dso_kernel_type kernel_type;
1542 bool is_kernel_mmap;
1543
1544
1545 if (machine__uses_kcore(machine))
1546 return 0;
1547
1548 if (machine__is_host(machine))
1549 kernel_type = DSO_TYPE_KERNEL;
1550 else
1551 kernel_type = DSO_TYPE_GUEST_KERNEL;
1552
1553 is_kernel_mmap = memcmp(event->mmap.filename,
1554 machine->mmap_name,
1555 strlen(machine->mmap_name) - 1) == 0;
1556 if (event->mmap.filename[0] == '/' ||
1557 (!is_kernel_mmap && event->mmap.filename[0] == '[')) {
1558 map = machine__findnew_module_map(machine, event->mmap.start,
1559 event->mmap.filename);
1560 if (map == NULL)
1561 goto out_problem;
1562
1563 map->end = map->start + event->mmap.len;
1564 } else if (is_kernel_mmap) {
1565 const char *symbol_name = (event->mmap.filename +
1566 strlen(machine->mmap_name));
1567
1568
1569
1570
1571 struct dso *kernel = NULL;
1572 struct dso *dso;
1573
1574 down_read(&machine->dsos.lock);
1575
1576 list_for_each_entry(dso, &machine->dsos.head, node) {
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594 if (!dso->kernel ||
1595 is_kernel_module(dso->long_name,
1596 PERF_RECORD_MISC_CPUMODE_UNKNOWN))
1597 continue;
1598
1599
1600 kernel = dso;
1601 break;
1602 }
1603
1604 up_read(&machine->dsos.lock);
1605
1606 if (kernel == NULL)
1607 kernel = machine__findnew_dso(machine, machine->mmap_name);
1608 if (kernel == NULL)
1609 goto out_problem;
1610
1611 kernel->kernel = kernel_type;
1612 if (__machine__create_kernel_maps(machine, kernel) < 0) {
1613 dso__put(kernel);
1614 goto out_problem;
1615 }
1616
1617 if (strstr(kernel->long_name, "vmlinux"))
1618 dso__set_short_name(kernel, "[kernel.vmlinux]", false);
1619
1620 machine__update_kernel_mmap(machine, event->mmap.start,
1621 event->mmap.start + event->mmap.len);
1622
1623
1624
1625
1626
1627
1628 if (event->mmap.pgoff != 0) {
1629 map__set_kallsyms_ref_reloc_sym(machine->vmlinux_map,
1630 symbol_name,
1631 event->mmap.pgoff);
1632 }
1633
1634 if (machine__is_default_guest(machine)) {
1635
1636
1637
1638 dso__load(kernel, machine__kernel_map(machine));
1639 }
1640 } else if (perf_event__is_extra_kernel_mmap(machine, event)) {
1641 return machine__process_extra_kernel_map(machine, event);
1642 }
1643 return 0;
1644out_problem:
1645 return -1;
1646}
1647
1648int machine__process_mmap2_event(struct machine *machine,
1649 union perf_event *event,
1650 struct perf_sample *sample)
1651{
1652 struct thread *thread;
1653 struct map *map;
1654 int ret = 0;
1655
1656 if (dump_trace)
1657 perf_event__fprintf_mmap2(event, stdout);
1658
1659 if (sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL ||
1660 sample->cpumode == PERF_RECORD_MISC_KERNEL) {
1661 ret = machine__process_kernel_mmap_event(machine, event);
1662 if (ret < 0)
1663 goto out_problem;
1664 return 0;
1665 }
1666
1667 thread = machine__findnew_thread(machine, event->mmap2.pid,
1668 event->mmap2.tid);
1669 if (thread == NULL)
1670 goto out_problem;
1671
1672 map = map__new(machine, event->mmap2.start,
1673 event->mmap2.len, event->mmap2.pgoff,
1674 event->mmap2.maj,
1675 event->mmap2.min, event->mmap2.ino,
1676 event->mmap2.ino_generation,
1677 event->mmap2.prot,
1678 event->mmap2.flags,
1679 event->mmap2.filename, thread);
1680
1681 if (map == NULL)
1682 goto out_problem_map;
1683
1684 ret = thread__insert_map(thread, map);
1685 if (ret)
1686 goto out_problem_insert;
1687
1688 thread__put(thread);
1689 map__put(map);
1690 return 0;
1691
1692out_problem_insert:
1693 map__put(map);
1694out_problem_map:
1695 thread__put(thread);
1696out_problem:
1697 dump_printf("problem processing PERF_RECORD_MMAP2, skipping event.\n");
1698 return 0;
1699}
1700
1701int machine__process_mmap_event(struct machine *machine, union perf_event *event,
1702 struct perf_sample *sample)
1703{
1704 struct thread *thread;
1705 struct map *map;
1706 u32 prot = 0;
1707 int ret = 0;
1708
1709 if (dump_trace)
1710 perf_event__fprintf_mmap(event, stdout);
1711
1712 if (sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL ||
1713 sample->cpumode == PERF_RECORD_MISC_KERNEL) {
1714 ret = machine__process_kernel_mmap_event(machine, event);
1715 if (ret < 0)
1716 goto out_problem;
1717 return 0;
1718 }
1719
1720 thread = machine__findnew_thread(machine, event->mmap.pid,
1721 event->mmap.tid);
1722 if (thread == NULL)
1723 goto out_problem;
1724
1725 if (!(event->header.misc & PERF_RECORD_MISC_MMAP_DATA))
1726 prot = PROT_EXEC;
1727
1728 map = map__new(machine, event->mmap.start,
1729 event->mmap.len, event->mmap.pgoff,
1730 0, 0, 0, 0, prot, 0,
1731 event->mmap.filename,
1732 thread);
1733
1734 if (map == NULL)
1735 goto out_problem_map;
1736
1737 ret = thread__insert_map(thread, map);
1738 if (ret)
1739 goto out_problem_insert;
1740
1741 thread__put(thread);
1742 map__put(map);
1743 return 0;
1744
1745out_problem_insert:
1746 map__put(map);
1747out_problem_map:
1748 thread__put(thread);
1749out_problem:
1750 dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n");
1751 return 0;
1752}
1753
1754static void __machine__remove_thread(struct machine *machine, struct thread *th, bool lock)
1755{
1756 struct threads *threads = machine__threads(machine, th->tid);
1757
1758 if (threads->last_match == th)
1759 threads__set_last_match(threads, NULL);
1760
1761 BUG_ON(refcount_read(&th->refcnt) == 0);
1762 if (lock)
1763 down_write(&threads->lock);
1764 rb_erase_cached(&th->rb_node, &threads->entries);
1765 RB_CLEAR_NODE(&th->rb_node);
1766 --threads->nr;
1767
1768
1769
1770
1771
1772 list_add_tail(&th->node, &threads->dead);
1773 if (lock)
1774 up_write(&threads->lock);
1775 thread__put(th);
1776}
1777
1778void machine__remove_thread(struct machine *machine, struct thread *th)
1779{
1780 return __machine__remove_thread(machine, th, true);
1781}
1782
1783int machine__process_fork_event(struct machine *machine, union perf_event *event,
1784 struct perf_sample *sample)
1785{
1786 struct thread *thread = machine__find_thread(machine,
1787 event->fork.pid,
1788 event->fork.tid);
1789 struct thread *parent = machine__findnew_thread(machine,
1790 event->fork.ppid,
1791 event->fork.ptid);
1792 bool do_maps_clone = true;
1793 int err = 0;
1794
1795 if (dump_trace)
1796 perf_event__fprintf_task(event, stdout);
1797
1798
1799
1800
1801
1802
1803
1804 if (parent->pid_ != (pid_t)event->fork.ppid) {
1805 dump_printf("removing erroneous parent thread %d/%d\n",
1806 parent->pid_, parent->tid);
1807 machine__remove_thread(machine, parent);
1808 thread__put(parent);
1809 parent = machine__findnew_thread(machine, event->fork.ppid,
1810 event->fork.ptid);
1811 }
1812
1813
1814 if (thread != NULL) {
1815 machine__remove_thread(machine, thread);
1816 thread__put(thread);
1817 }
1818
1819 thread = machine__findnew_thread(machine, event->fork.pid,
1820 event->fork.tid);
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835 if (event->fork.header.misc & PERF_RECORD_MISC_FORK_EXEC)
1836 do_maps_clone = false;
1837
1838 if (thread == NULL || parent == NULL ||
1839 thread__fork(thread, parent, sample->time, do_maps_clone) < 0) {
1840 dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n");
1841 err = -1;
1842 }
1843 thread__put(thread);
1844 thread__put(parent);
1845
1846 return err;
1847}
1848
1849int machine__process_exit_event(struct machine *machine, union perf_event *event,
1850 struct perf_sample *sample __maybe_unused)
1851{
1852 struct thread *thread = machine__find_thread(machine,
1853 event->fork.pid,
1854 event->fork.tid);
1855
1856 if (dump_trace)
1857 perf_event__fprintf_task(event, stdout);
1858
1859 if (thread != NULL) {
1860 thread__exited(thread);
1861 thread__put(thread);
1862 }
1863
1864 return 0;
1865}
1866
1867int machine__process_event(struct machine *machine, union perf_event *event,
1868 struct perf_sample *sample)
1869{
1870 int ret;
1871
1872 switch (event->header.type) {
1873 case PERF_RECORD_COMM:
1874 ret = machine__process_comm_event(machine, event, sample); break;
1875 case PERF_RECORD_MMAP:
1876 ret = machine__process_mmap_event(machine, event, sample); break;
1877 case PERF_RECORD_NAMESPACES:
1878 ret = machine__process_namespaces_event(machine, event, sample); break;
1879 case PERF_RECORD_MMAP2:
1880 ret = machine__process_mmap2_event(machine, event, sample); break;
1881 case PERF_RECORD_FORK:
1882 ret = machine__process_fork_event(machine, event, sample); break;
1883 case PERF_RECORD_EXIT:
1884 ret = machine__process_exit_event(machine, event, sample); break;
1885 case PERF_RECORD_LOST:
1886 ret = machine__process_lost_event(machine, event, sample); break;
1887 case PERF_RECORD_AUX:
1888 ret = machine__process_aux_event(machine, event); break;
1889 case PERF_RECORD_ITRACE_START:
1890 ret = machine__process_itrace_start_event(machine, event); break;
1891 case PERF_RECORD_LOST_SAMPLES:
1892 ret = machine__process_lost_samples_event(machine, event, sample); break;
1893 case PERF_RECORD_SWITCH:
1894 case PERF_RECORD_SWITCH_CPU_WIDE:
1895 ret = machine__process_switch_event(machine, event); break;
1896 case PERF_RECORD_KSYMBOL:
1897 ret = machine__process_ksymbol(machine, event, sample); break;
1898 case PERF_RECORD_BPF_EVENT:
1899 ret = machine__process_bpf_event(machine, event, sample); break;
1900 default:
1901 ret = -1;
1902 break;
1903 }
1904
1905 return ret;
1906}
1907
1908static bool symbol__match_regex(struct symbol *sym, regex_t *regex)
1909{
1910 if (!regexec(regex, sym->name, 0, NULL, 0))
1911 return 1;
1912 return 0;
1913}
1914
1915static void ip__resolve_ams(struct thread *thread,
1916 struct addr_map_symbol *ams,
1917 u64 ip)
1918{
1919 struct addr_location al;
1920
1921 memset(&al, 0, sizeof(al));
1922
1923
1924
1925
1926
1927
1928
1929 thread__find_cpumode_addr_location(thread, ip, &al);
1930
1931 ams->addr = ip;
1932 ams->al_addr = al.addr;
1933 ams->sym = al.sym;
1934 ams->map = al.map;
1935 ams->phys_addr = 0;
1936}
1937
1938static void ip__resolve_data(struct thread *thread,
1939 u8 m, struct addr_map_symbol *ams,
1940 u64 addr, u64 phys_addr)
1941{
1942 struct addr_location al;
1943
1944 memset(&al, 0, sizeof(al));
1945
1946 thread__find_symbol(thread, m, addr, &al);
1947
1948 ams->addr = addr;
1949 ams->al_addr = al.addr;
1950 ams->sym = al.sym;
1951 ams->map = al.map;
1952 ams->phys_addr = phys_addr;
1953}
1954
1955struct mem_info *sample__resolve_mem(struct perf_sample *sample,
1956 struct addr_location *al)
1957{
1958 struct mem_info *mi = mem_info__new();
1959
1960 if (!mi)
1961 return NULL;
1962
1963 ip__resolve_ams(al->thread, &mi->iaddr, sample->ip);
1964 ip__resolve_data(al->thread, al->cpumode, &mi->daddr,
1965 sample->addr, sample->phys_addr);
1966 mi->data_src.val = sample->data_src;
1967
1968 return mi;
1969}
1970
1971static char *callchain_srcline(struct map *map, struct symbol *sym, u64 ip)
1972{
1973 char *srcline = NULL;
1974
1975 if (!map || callchain_param.key == CCKEY_FUNCTION)
1976 return srcline;
1977
1978 srcline = srcline__tree_find(&map->dso->srclines, ip);
1979 if (!srcline) {
1980 bool show_sym = false;
1981 bool show_addr = callchain_param.key == CCKEY_ADDRESS;
1982
1983 srcline = get_srcline(map->dso, map__rip_2objdump(map, ip),
1984 sym, show_sym, show_addr, ip);
1985 srcline__tree_insert(&map->dso->srclines, ip, srcline);
1986 }
1987
1988 return srcline;
1989}
1990
1991struct iterations {
1992 int nr_loop_iter;
1993 u64 cycles;
1994};
1995
1996static int add_callchain_ip(struct thread *thread,
1997 struct callchain_cursor *cursor,
1998 struct symbol **parent,
1999 struct addr_location *root_al,
2000 u8 *cpumode,
2001 u64 ip,
2002 bool branch,
2003 struct branch_flags *flags,
2004 struct iterations *iter,
2005 u64 branch_from)
2006{
2007 struct addr_location al;
2008 int nr_loop_iter = 0;
2009 u64 iter_cycles = 0;
2010 const char *srcline = NULL;
2011
2012 al.filtered = 0;
2013 al.sym = NULL;
2014 if (!cpumode) {
2015 thread__find_cpumode_addr_location(thread, ip, &al);
2016 } else {
2017 if (ip >= PERF_CONTEXT_MAX) {
2018 switch (ip) {
2019 case PERF_CONTEXT_HV:
2020 *cpumode = PERF_RECORD_MISC_HYPERVISOR;
2021 break;
2022 case PERF_CONTEXT_KERNEL:
2023 *cpumode = PERF_RECORD_MISC_KERNEL;
2024 break;
2025 case PERF_CONTEXT_USER:
2026 *cpumode = PERF_RECORD_MISC_USER;
2027 break;
2028 default:
2029 pr_debug("invalid callchain context: "
2030 "%"PRId64"\n", (s64) ip);
2031
2032
2033
2034
2035 callchain_cursor_reset(cursor);
2036 return 1;
2037 }
2038 return 0;
2039 }
2040 thread__find_symbol(thread, *cpumode, ip, &al);
2041 }
2042
2043 if (al.sym != NULL) {
2044 if (perf_hpp_list.parent && !*parent &&
2045 symbol__match_regex(al.sym, &parent_regex))
2046 *parent = al.sym;
2047 else if (have_ignore_callees && root_al &&
2048 symbol__match_regex(al.sym, &ignore_callees_regex)) {
2049
2050
2051 *root_al = al;
2052 callchain_cursor_reset(cursor);
2053 }
2054 }
2055
2056 if (symbol_conf.hide_unresolved && al.sym == NULL)
2057 return 0;
2058
2059 if (iter) {
2060 nr_loop_iter = iter->nr_loop_iter;
2061 iter_cycles = iter->cycles;
2062 }
2063
2064 srcline = callchain_srcline(al.map, al.sym, al.addr);
2065 return callchain_cursor_append(cursor, ip, al.map, al.sym,
2066 branch, flags, nr_loop_iter,
2067 iter_cycles, branch_from, srcline);
2068}
2069
2070struct branch_info *sample__resolve_bstack(struct perf_sample *sample,
2071 struct addr_location *al)
2072{
2073 unsigned int i;
2074 const struct branch_stack *bs = sample->branch_stack;
2075 struct branch_info *bi = calloc(bs->nr, sizeof(struct branch_info));
2076
2077 if (!bi)
2078 return NULL;
2079
2080 for (i = 0; i < bs->nr; i++) {
2081 ip__resolve_ams(al->thread, &bi[i].to, bs->entries[i].to);
2082 ip__resolve_ams(al->thread, &bi[i].from, bs->entries[i].from);
2083 bi[i].flags = bs->entries[i].flags;
2084 }
2085 return bi;
2086}
2087
2088static void save_iterations(struct iterations *iter,
2089 struct branch_entry *be, int nr)
2090{
2091 int i;
2092
2093 iter->nr_loop_iter++;
2094 iter->cycles = 0;
2095
2096 for (i = 0; i < nr; i++)
2097 iter->cycles += be[i].flags.cycles;
2098}
2099
2100#define CHASHSZ 127
2101#define CHASHBITS 7
2102#define NO_ENTRY 0xff
2103
2104#define PERF_MAX_BRANCH_DEPTH 127
2105
2106
2107static int remove_loops(struct branch_entry *l, int nr,
2108 struct iterations *iter)
2109{
2110 int i, j, off;
2111 unsigned char chash[CHASHSZ];
2112
2113 memset(chash, NO_ENTRY, sizeof(chash));
2114
2115 BUG_ON(PERF_MAX_BRANCH_DEPTH > 255);
2116
2117 for (i = 0; i < nr; i++) {
2118 int h = hash_64(l[i].from, CHASHBITS) % CHASHSZ;
2119
2120
2121 if (chash[h] == NO_ENTRY) {
2122 chash[h] = i;
2123 } else if (l[chash[h]].from == l[i].from) {
2124 bool is_loop = true;
2125
2126 off = 0;
2127 for (j = chash[h]; j < i && i + off < nr; j++, off++)
2128 if (l[j].from != l[i + off].from) {
2129 is_loop = false;
2130 break;
2131 }
2132 if (is_loop) {
2133 j = nr - (i + off);
2134 if (j > 0) {
2135 save_iterations(iter + i + off,
2136 l + i, off);
2137
2138 memmove(iter + i, iter + i + off,
2139 j * sizeof(*iter));
2140
2141 memmove(l + i, l + i + off,
2142 j * sizeof(*l));
2143 }
2144
2145 nr -= off;
2146 }
2147 }
2148 }
2149 return nr;
2150}
2151
2152
2153
2154
2155
2156
2157
2158
2159static int resolve_lbr_callchain_sample(struct thread *thread,
2160 struct callchain_cursor *cursor,
2161 struct perf_sample *sample,
2162 struct symbol **parent,
2163 struct addr_location *root_al,
2164 int max_stack)
2165{
2166 struct ip_callchain *chain = sample->callchain;
2167 int chain_nr = min(max_stack, (int)chain->nr), i;
2168 u8 cpumode = PERF_RECORD_MISC_USER;
2169 u64 ip, branch_from = 0;
2170
2171 for (i = 0; i < chain_nr; i++) {
2172 if (chain->ips[i] == PERF_CONTEXT_USER)
2173 break;
2174 }
2175
2176
2177 if (i != chain_nr) {
2178 struct branch_stack *lbr_stack = sample->branch_stack;
2179 int lbr_nr = lbr_stack->nr, j, k;
2180 bool branch;
2181 struct branch_flags *flags;
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192 int mix_chain_nr = i + 1 + lbr_nr + 1;
2193
2194 for (j = 0; j < mix_chain_nr; j++) {
2195 int err;
2196 branch = false;
2197 flags = NULL;
2198
2199 if (callchain_param.order == ORDER_CALLEE) {
2200 if (j < i + 1)
2201 ip = chain->ips[j];
2202 else if (j > i + 1) {
2203 k = j - i - 2;
2204 ip = lbr_stack->entries[k].from;
2205 branch = true;
2206 flags = &lbr_stack->entries[k].flags;
2207 } else {
2208 ip = lbr_stack->entries[0].to;
2209 branch = true;
2210 flags = &lbr_stack->entries[0].flags;
2211 branch_from =
2212 lbr_stack->entries[0].from;
2213 }
2214 } else {
2215 if (j < lbr_nr) {
2216 k = lbr_nr - j - 1;
2217 ip = lbr_stack->entries[k].from;
2218 branch = true;
2219 flags = &lbr_stack->entries[k].flags;
2220 }
2221 else if (j > lbr_nr)
2222 ip = chain->ips[i + 1 - (j - lbr_nr)];
2223 else {
2224 ip = lbr_stack->entries[0].to;
2225 branch = true;
2226 flags = &lbr_stack->entries[0].flags;
2227 branch_from =
2228 lbr_stack->entries[0].from;
2229 }
2230 }
2231
2232 err = add_callchain_ip(thread, cursor, parent,
2233 root_al, &cpumode, ip,
2234 branch, flags, NULL,
2235 branch_from);
2236 if (err)
2237 return (err < 0) ? err : 0;
2238 }
2239 return 1;
2240 }
2241
2242 return 0;
2243}
2244
2245static int find_prev_cpumode(struct ip_callchain *chain, struct thread *thread,
2246 struct callchain_cursor *cursor,
2247 struct symbol **parent,
2248 struct addr_location *root_al,
2249 u8 *cpumode, int ent)
2250{
2251 int err = 0;
2252
2253 while (--ent >= 0) {
2254 u64 ip = chain->ips[ent];
2255
2256 if (ip >= PERF_CONTEXT_MAX) {
2257 err = add_callchain_ip(thread, cursor, parent,
2258 root_al, cpumode, ip,
2259 false, NULL, NULL, 0);
2260 break;
2261 }
2262 }
2263 return err;
2264}
2265
2266static int thread__resolve_callchain_sample(struct thread *thread,
2267 struct callchain_cursor *cursor,
2268 struct perf_evsel *evsel,
2269 struct perf_sample *sample,
2270 struct symbol **parent,
2271 struct addr_location *root_al,
2272 int max_stack)
2273{
2274 struct branch_stack *branch = sample->branch_stack;
2275 struct ip_callchain *chain = sample->callchain;
2276 int chain_nr = 0;
2277 u8 cpumode = PERF_RECORD_MISC_USER;
2278 int i, j, err, nr_entries;
2279 int skip_idx = -1;
2280 int first_call = 0;
2281
2282 if (chain)
2283 chain_nr = chain->nr;
2284
2285 if (perf_evsel__has_branch_callstack(evsel)) {
2286 err = resolve_lbr_callchain_sample(thread, cursor, sample, parent,
2287 root_al, max_stack);
2288 if (err)
2289 return (err < 0) ? err : 0;
2290 }
2291
2292
2293
2294
2295
2296 skip_idx = arch_skip_callchain_idx(thread, chain);
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310 if (branch && callchain_param.branch_callstack) {
2311 int nr = min(max_stack, (int)branch->nr);
2312 struct branch_entry be[nr];
2313 struct iterations iter[nr];
2314
2315 if (branch->nr > PERF_MAX_BRANCH_DEPTH) {
2316 pr_warning("corrupted branch chain. skipping...\n");
2317 goto check_calls;
2318 }
2319
2320 for (i = 0; i < nr; i++) {
2321 if (callchain_param.order == ORDER_CALLEE) {
2322 be[i] = branch->entries[i];
2323
2324 if (chain == NULL)
2325 continue;
2326
2327
2328
2329
2330
2331
2332
2333
2334 if (i == skip_idx ||
2335 chain->ips[first_call] >= PERF_CONTEXT_MAX)
2336 first_call++;
2337 else if (be[i].from < chain->ips[first_call] &&
2338 be[i].from >= chain->ips[first_call] - 8)
2339 first_call++;
2340 } else
2341 be[i] = branch->entries[branch->nr - i - 1];
2342 }
2343
2344 memset(iter, 0, sizeof(struct iterations) * nr);
2345 nr = remove_loops(be, nr, iter);
2346
2347 for (i = 0; i < nr; i++) {
2348 err = add_callchain_ip(thread, cursor, parent,
2349 root_al,
2350 NULL, be[i].to,
2351 true, &be[i].flags,
2352 NULL, be[i].from);
2353
2354 if (!err)
2355 err = add_callchain_ip(thread, cursor, parent, root_al,
2356 NULL, be[i].from,
2357 true, &be[i].flags,
2358 &iter[i], 0);
2359 if (err == -EINVAL)
2360 break;
2361 if (err)
2362 return err;
2363 }
2364
2365 if (chain_nr == 0)
2366 return 0;
2367
2368 chain_nr -= nr;
2369 }
2370
2371check_calls:
2372 if (callchain_param.order != ORDER_CALLEE) {
2373 err = find_prev_cpumode(chain, thread, cursor, parent, root_al,
2374 &cpumode, chain->nr - first_call);
2375 if (err)
2376 return (err < 0) ? err : 0;
2377 }
2378 for (i = first_call, nr_entries = 0;
2379 i < chain_nr && nr_entries < max_stack; i++) {
2380 u64 ip;
2381
2382 if (callchain_param.order == ORDER_CALLEE)
2383 j = i;
2384 else
2385 j = chain->nr - i - 1;
2386
2387#ifdef HAVE_SKIP_CALLCHAIN_IDX
2388 if (j == skip_idx)
2389 continue;
2390#endif
2391 ip = chain->ips[j];
2392 if (ip < PERF_CONTEXT_MAX)
2393 ++nr_entries;
2394 else if (callchain_param.order != ORDER_CALLEE) {
2395 err = find_prev_cpumode(chain, thread, cursor, parent,
2396 root_al, &cpumode, j);
2397 if (err)
2398 return (err < 0) ? err : 0;
2399 continue;
2400 }
2401
2402 err = add_callchain_ip(thread, cursor, parent,
2403 root_al, &cpumode, ip,
2404 false, NULL, NULL, 0);
2405
2406 if (err)
2407 return (err < 0) ? err : 0;
2408 }
2409
2410 return 0;
2411}
2412
2413static int append_inlines(struct callchain_cursor *cursor,
2414 struct map *map, struct symbol *sym, u64 ip)
2415{
2416 struct inline_node *inline_node;
2417 struct inline_list *ilist;
2418 u64 addr;
2419 int ret = 1;
2420
2421 if (!symbol_conf.inline_name || !map || !sym)
2422 return ret;
2423
2424 addr = map__map_ip(map, ip);
2425 addr = map__rip_2objdump(map, addr);
2426
2427 inline_node = inlines__tree_find(&map->dso->inlined_nodes, addr);
2428 if (!inline_node) {
2429 inline_node = dso__parse_addr_inlines(map->dso, addr, sym);
2430 if (!inline_node)
2431 return ret;
2432 inlines__tree_insert(&map->dso->inlined_nodes, inline_node);
2433 }
2434
2435 list_for_each_entry(ilist, &inline_node->val, list) {
2436 ret = callchain_cursor_append(cursor, ip, map,
2437 ilist->symbol, false,
2438 NULL, 0, 0, 0, ilist->srcline);
2439
2440 if (ret != 0)
2441 return ret;
2442 }
2443
2444 return ret;
2445}
2446
2447static int unwind_entry(struct unwind_entry *entry, void *arg)
2448{
2449 struct callchain_cursor *cursor = arg;
2450 const char *srcline = NULL;
2451 u64 addr = entry->ip;
2452
2453 if (symbol_conf.hide_unresolved && entry->sym == NULL)
2454 return 0;
2455
2456 if (append_inlines(cursor, entry->map, entry->sym, entry->ip) == 0)
2457 return 0;
2458
2459
2460
2461
2462
2463 if (entry->map)
2464 addr = map__map_ip(entry->map, entry->ip);
2465
2466 srcline = callchain_srcline(entry->map, entry->sym, addr);
2467 return callchain_cursor_append(cursor, entry->ip,
2468 entry->map, entry->sym,
2469 false, NULL, 0, 0, 0, srcline);
2470}
2471
2472static int thread__resolve_callchain_unwind(struct thread *thread,
2473 struct callchain_cursor *cursor,
2474 struct perf_evsel *evsel,
2475 struct perf_sample *sample,
2476 int max_stack)
2477{
2478
2479 if (!((evsel->attr.sample_type & PERF_SAMPLE_REGS_USER) &&
2480 (evsel->attr.sample_type & PERF_SAMPLE_STACK_USER)))
2481 return 0;
2482
2483
2484 if ((!sample->user_regs.regs) ||
2485 (!sample->user_stack.size))
2486 return 0;
2487
2488 return unwind__get_entries(unwind_entry, cursor,
2489 thread, sample, max_stack);
2490}
2491
2492int thread__resolve_callchain(struct thread *thread,
2493 struct callchain_cursor *cursor,
2494 struct perf_evsel *evsel,
2495 struct perf_sample *sample,
2496 struct symbol **parent,
2497 struct addr_location *root_al,
2498 int max_stack)
2499{
2500 int ret = 0;
2501
2502 callchain_cursor_reset(cursor);
2503
2504 if (callchain_param.order == ORDER_CALLEE) {
2505 ret = thread__resolve_callchain_sample(thread, cursor,
2506 evsel, sample,
2507 parent, root_al,
2508 max_stack);
2509 if (ret)
2510 return ret;
2511 ret = thread__resolve_callchain_unwind(thread, cursor,
2512 evsel, sample,
2513 max_stack);
2514 } else {
2515 ret = thread__resolve_callchain_unwind(thread, cursor,
2516 evsel, sample,
2517 max_stack);
2518 if (ret)
2519 return ret;
2520 ret = thread__resolve_callchain_sample(thread, cursor,
2521 evsel, sample,
2522 parent, root_al,
2523 max_stack);
2524 }
2525
2526 return ret;
2527}
2528
2529int machine__for_each_thread(struct machine *machine,
2530 int (*fn)(struct thread *thread, void *p),
2531 void *priv)
2532{
2533 struct threads *threads;
2534 struct rb_node *nd;
2535 struct thread *thread;
2536 int rc = 0;
2537 int i;
2538
2539 for (i = 0; i < THREADS__TABLE_SIZE; i++) {
2540 threads = &machine->threads[i];
2541 for (nd = rb_first_cached(&threads->entries); nd;
2542 nd = rb_next(nd)) {
2543 thread = rb_entry(nd, struct thread, rb_node);
2544 rc = fn(thread, priv);
2545 if (rc != 0)
2546 return rc;
2547 }
2548
2549 list_for_each_entry(thread, &threads->dead, node) {
2550 rc = fn(thread, priv);
2551 if (rc != 0)
2552 return rc;
2553 }
2554 }
2555 return rc;
2556}
2557
2558int machines__for_each_thread(struct machines *machines,
2559 int (*fn)(struct thread *thread, void *p),
2560 void *priv)
2561{
2562 struct rb_node *nd;
2563 int rc = 0;
2564
2565 rc = machine__for_each_thread(&machines->host, fn, priv);
2566 if (rc != 0)
2567 return rc;
2568
2569 for (nd = rb_first_cached(&machines->guests); nd; nd = rb_next(nd)) {
2570 struct machine *machine = rb_entry(nd, struct machine, rb_node);
2571
2572 rc = machine__for_each_thread(machine, fn, priv);
2573 if (rc != 0)
2574 return rc;
2575 }
2576 return rc;
2577}
2578
2579int __machine__synthesize_threads(struct machine *machine, struct perf_tool *tool,
2580 struct target *target, struct thread_map *threads,
2581 perf_event__handler_t process, bool data_mmap,
2582 unsigned int nr_threads_synthesize)
2583{
2584 if (target__has_task(target))
2585 return perf_event__synthesize_thread_map(tool, threads, process, machine, data_mmap);
2586 else if (target__has_cpu(target))
2587 return perf_event__synthesize_threads(tool, process,
2588 machine, data_mmap,
2589 nr_threads_synthesize);
2590
2591 return 0;
2592}
2593
2594pid_t machine__get_current_tid(struct machine *machine, int cpu)
2595{
2596 if (cpu < 0 || cpu >= MAX_NR_CPUS || !machine->current_tid)
2597 return -1;
2598
2599 return machine->current_tid[cpu];
2600}
2601
2602int machine__set_current_tid(struct machine *machine, int cpu, pid_t pid,
2603 pid_t tid)
2604{
2605 struct thread *thread;
2606
2607 if (cpu < 0)
2608 return -EINVAL;
2609
2610 if (!machine->current_tid) {
2611 int i;
2612
2613 machine->current_tid = calloc(MAX_NR_CPUS, sizeof(pid_t));
2614 if (!machine->current_tid)
2615 return -ENOMEM;
2616 for (i = 0; i < MAX_NR_CPUS; i++)
2617 machine->current_tid[i] = -1;
2618 }
2619
2620 if (cpu >= MAX_NR_CPUS) {
2621 pr_err("Requested CPU %d too large. ", cpu);
2622 pr_err("Consider raising MAX_NR_CPUS\n");
2623 return -EINVAL;
2624 }
2625
2626 machine->current_tid[cpu] = tid;
2627
2628 thread = machine__findnew_thread(machine, pid, tid);
2629 if (!thread)
2630 return -ENOMEM;
2631
2632 thread->cpu = cpu;
2633 thread__put(thread);
2634
2635 return 0;
2636}
2637
2638
2639
2640
2641
2642bool machine__is(struct machine *machine, const char *arch)
2643{
2644 return machine && !strcmp(perf_env__raw_arch(machine->env), arch);
2645}
2646
2647int machine__nr_cpus_avail(struct machine *machine)
2648{
2649 return machine ? perf_env__nr_cpus_avail(machine->env) : 0;
2650}
2651
2652int machine__get_kernel_start(struct machine *machine)
2653{
2654 struct map *map = machine__kernel_map(machine);
2655 int err = 0;
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665 machine->kernel_start = 1ULL << 63;
2666 if (map) {
2667 err = map__load(map);
2668
2669
2670
2671
2672
2673 if (!err && !machine__is(machine, "x86_64"))
2674 machine->kernel_start = map->start;
2675 }
2676 return err;
2677}
2678
2679u8 machine__addr_cpumode(struct machine *machine, u8 cpumode, u64 addr)
2680{
2681 u8 addr_cpumode = cpumode;
2682 bool kernel_ip;
2683
2684 if (!machine->single_address_space)
2685 goto out;
2686
2687 kernel_ip = machine__kernel_ip(machine, addr);
2688 switch (cpumode) {
2689 case PERF_RECORD_MISC_KERNEL:
2690 case PERF_RECORD_MISC_USER:
2691 addr_cpumode = kernel_ip ? PERF_RECORD_MISC_KERNEL :
2692 PERF_RECORD_MISC_USER;
2693 break;
2694 case PERF_RECORD_MISC_GUEST_KERNEL:
2695 case PERF_RECORD_MISC_GUEST_USER:
2696 addr_cpumode = kernel_ip ? PERF_RECORD_MISC_GUEST_KERNEL :
2697 PERF_RECORD_MISC_GUEST_USER;
2698 break;
2699 default:
2700 break;
2701 }
2702out:
2703 return addr_cpumode;
2704}
2705
2706struct dso *machine__findnew_dso(struct machine *machine, const char *filename)
2707{
2708 return dsos__findnew(&machine->dsos, filename);
2709}
2710
2711char *machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp)
2712{
2713 struct machine *machine = vmachine;
2714 struct map *map;
2715 struct symbol *sym = machine__find_kernel_symbol(machine, *addrp, &map);
2716
2717 if (sym == NULL)
2718 return NULL;
2719
2720 *modp = __map__is_kmodule(map) ? (char *)map->dso->short_name : NULL;
2721 *addrp = map->unmap_ip(map, sym->start);
2722 return sym->name;
2723}
2724