1#include "callchain.h"
2#include "debug.h"
3#include "event.h"
4#include "evsel.h"
5#include "hist.h"
6#include "machine.h"
7#include "map.h"
8#include "sort.h"
9#include "strlist.h"
10#include "thread.h"
11#include <stdbool.h>
12#include "unwind.h"
13
14int machine__init(struct machine *machine, const char *root_dir, pid_t pid)
15{
16 map_groups__init(&machine->kmaps);
17 RB_CLEAR_NODE(&machine->rb_node);
18 INIT_LIST_HEAD(&machine->user_dsos);
19 INIT_LIST_HEAD(&machine->kernel_dsos);
20
21 machine->threads = RB_ROOT;
22 INIT_LIST_HEAD(&machine->dead_threads);
23 machine->last_match = NULL;
24
25 machine->kmaps.machine = machine;
26 machine->pid = pid;
27
28 machine->root_dir = strdup(root_dir);
29 if (machine->root_dir == NULL)
30 return -ENOMEM;
31
32 if (pid != HOST_KERNEL_ID) {
33 struct thread *thread = machine__findnew_thread(machine, pid);
34 char comm[64];
35
36 if (thread == NULL)
37 return -ENOMEM;
38
39 snprintf(comm, sizeof(comm), "[guest/%d]", pid);
40 thread__set_comm(thread, comm);
41 }
42
43 return 0;
44}
45
46static void dsos__delete(struct list_head *dsos)
47{
48 struct dso *pos, *n;
49
50 list_for_each_entry_safe(pos, n, dsos, node) {
51 list_del(&pos->node);
52 dso__delete(pos);
53 }
54}
55
56void machine__delete_dead_threads(struct machine *machine)
57{
58 struct thread *n, *t;
59
60 list_for_each_entry_safe(t, n, &machine->dead_threads, node) {
61 list_del(&t->node);
62 thread__delete(t);
63 }
64}
65
66void machine__delete_threads(struct machine *machine)
67{
68 struct rb_node *nd = rb_first(&machine->threads);
69
70 while (nd) {
71 struct thread *t = rb_entry(nd, struct thread, rb_node);
72
73 rb_erase(&t->rb_node, &machine->threads);
74 nd = rb_next(nd);
75 thread__delete(t);
76 }
77}
78
79void machine__exit(struct machine *machine)
80{
81 map_groups__exit(&machine->kmaps);
82 dsos__delete(&machine->user_dsos);
83 dsos__delete(&machine->kernel_dsos);
84 free(machine->root_dir);
85 machine->root_dir = NULL;
86}
87
88void machine__delete(struct machine *machine)
89{
90 machine__exit(machine);
91 free(machine);
92}
93
94void machines__init(struct machines *machines)
95{
96 machine__init(&machines->host, "", HOST_KERNEL_ID);
97 machines->guests = RB_ROOT;
98}
99
100void machines__exit(struct machines *machines)
101{
102 machine__exit(&machines->host);
103
104}
105
106struct machine *machines__add(struct machines *machines, pid_t pid,
107 const char *root_dir)
108{
109 struct rb_node **p = &machines->guests.rb_node;
110 struct rb_node *parent = NULL;
111 struct machine *pos, *machine = malloc(sizeof(*machine));
112
113 if (machine == NULL)
114 return NULL;
115
116 if (machine__init(machine, root_dir, pid) != 0) {
117 free(machine);
118 return NULL;
119 }
120
121 while (*p != NULL) {
122 parent = *p;
123 pos = rb_entry(parent, struct machine, rb_node);
124 if (pid < pos->pid)
125 p = &(*p)->rb_left;
126 else
127 p = &(*p)->rb_right;
128 }
129
130 rb_link_node(&machine->rb_node, parent, p);
131 rb_insert_color(&machine->rb_node, &machines->guests);
132
133 return machine;
134}
135
136struct machine *machines__find(struct machines *machines, pid_t pid)
137{
138 struct rb_node **p = &machines->guests.rb_node;
139 struct rb_node *parent = NULL;
140 struct machine *machine;
141 struct machine *default_machine = NULL;
142
143 if (pid == HOST_KERNEL_ID)
144 return &machines->host;
145
146 while (*p != NULL) {
147 parent = *p;
148 machine = rb_entry(parent, struct machine, rb_node);
149 if (pid < machine->pid)
150 p = &(*p)->rb_left;
151 else if (pid > machine->pid)
152 p = &(*p)->rb_right;
153 else
154 return machine;
155 if (!machine->pid)
156 default_machine = machine;
157 }
158
159 return default_machine;
160}
161
162struct machine *machines__findnew(struct machines *machines, pid_t pid)
163{
164 char path[PATH_MAX];
165 const char *root_dir = "";
166 struct machine *machine = machines__find(machines, pid);
167
168 if (machine && (machine->pid == pid))
169 goto out;
170
171 if ((pid != HOST_KERNEL_ID) &&
172 (pid != DEFAULT_GUEST_KERNEL_ID) &&
173 (symbol_conf.guestmount)) {
174 sprintf(path, "%s/%d", symbol_conf.guestmount, pid);
175 if (access(path, R_OK)) {
176 static struct strlist *seen;
177
178 if (!seen)
179 seen = strlist__new(true, NULL);
180
181 if (!strlist__has_entry(seen, path)) {
182 pr_err("Can't access file %s\n", path);
183 strlist__add(seen, path);
184 }
185 machine = NULL;
186 goto out;
187 }
188 root_dir = path;
189 }
190
191 machine = machines__add(machines, pid, root_dir);
192out:
193 return machine;
194}
195
196void machines__process_guests(struct machines *machines,
197 machine__process_t process, void *data)
198{
199 struct rb_node *nd;
200
201 for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) {
202 struct machine *pos = rb_entry(nd, struct machine, rb_node);
203 process(pos, data);
204 }
205}
206
207char *machine__mmap_name(struct machine *machine, char *bf, size_t size)
208{
209 if (machine__is_host(machine))
210 snprintf(bf, size, "[%s]", "kernel.kallsyms");
211 else if (machine__is_default_guest(machine))
212 snprintf(bf, size, "[%s]", "guest.kernel.kallsyms");
213 else {
214 snprintf(bf, size, "[%s.%d]", "guest.kernel.kallsyms",
215 machine->pid);
216 }
217
218 return bf;
219}
220
221void machines__set_id_hdr_size(struct machines *machines, u16 id_hdr_size)
222{
223 struct rb_node *node;
224 struct machine *machine;
225
226 machines->host.id_hdr_size = id_hdr_size;
227
228 for (node = rb_first(&machines->guests); node; node = rb_next(node)) {
229 machine = rb_entry(node, struct machine, rb_node);
230 machine->id_hdr_size = id_hdr_size;
231 }
232
233 return;
234}
235
236static struct thread *__machine__findnew_thread(struct machine *machine, pid_t pid,
237 bool create)
238{
239 struct rb_node **p = &machine->threads.rb_node;
240 struct rb_node *parent = NULL;
241 struct thread *th;
242
243
244
245
246
247
248 if (machine->last_match && machine->last_match->pid == pid)
249 return machine->last_match;
250
251 while (*p != NULL) {
252 parent = *p;
253 th = rb_entry(parent, struct thread, rb_node);
254
255 if (th->pid == pid) {
256 machine->last_match = th;
257 return th;
258 }
259
260 if (pid < th->pid)
261 p = &(*p)->rb_left;
262 else
263 p = &(*p)->rb_right;
264 }
265
266 if (!create)
267 return NULL;
268
269 th = thread__new(pid);
270 if (th != NULL) {
271 rb_link_node(&th->rb_node, parent, p);
272 rb_insert_color(&th->rb_node, &machine->threads);
273 machine->last_match = th;
274 }
275
276 return th;
277}
278
279struct thread *machine__findnew_thread(struct machine *machine, pid_t pid)
280{
281 return __machine__findnew_thread(machine, pid, true);
282}
283
284struct thread *machine__find_thread(struct machine *machine, pid_t pid)
285{
286 return __machine__findnew_thread(machine, pid, false);
287}
288
289int machine__process_comm_event(struct machine *machine, union perf_event *event)
290{
291 struct thread *thread = machine__findnew_thread(machine, event->comm.tid);
292
293 if (dump_trace)
294 perf_event__fprintf_comm(event, stdout);
295
296 if (thread == NULL || thread__set_comm(thread, event->comm.comm)) {
297 dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n");
298 return -1;
299 }
300
301 return 0;
302}
303
304int machine__process_lost_event(struct machine *machine __maybe_unused,
305 union perf_event *event)
306{
307 dump_printf(": id:%" PRIu64 ": lost:%" PRIu64 "\n",
308 event->lost.id, event->lost.lost);
309 return 0;
310}
311
312struct map *machine__new_module(struct machine *machine, u64 start,
313 const char *filename)
314{
315 struct map *map;
316 struct dso *dso = __dsos__findnew(&machine->kernel_dsos, filename);
317
318 if (dso == NULL)
319 return NULL;
320
321 map = map__new2(start, dso, MAP__FUNCTION);
322 if (map == NULL)
323 return NULL;
324
325 if (machine__is_host(machine))
326 dso->symtab_type = DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE;
327 else
328 dso->symtab_type = DSO_BINARY_TYPE__GUEST_KMODULE;
329 map_groups__insert(&machine->kmaps, map);
330 return map;
331}
332
333size_t machines__fprintf_dsos(struct machines *machines, FILE *fp)
334{
335 struct rb_node *nd;
336 size_t ret = __dsos__fprintf(&machines->host.kernel_dsos, fp) +
337 __dsos__fprintf(&machines->host.user_dsos, fp);
338
339 for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) {
340 struct machine *pos = rb_entry(nd, struct machine, rb_node);
341 ret += __dsos__fprintf(&pos->kernel_dsos, fp);
342 ret += __dsos__fprintf(&pos->user_dsos, fp);
343 }
344
345 return ret;
346}
347
348size_t machine__fprintf_dsos_buildid(struct machine *machine, FILE *fp,
349 bool (skip)(struct dso *dso, int parm), int parm)
350{
351 return __dsos__fprintf_buildid(&machine->kernel_dsos, fp, skip, parm) +
352 __dsos__fprintf_buildid(&machine->user_dsos, fp, skip, parm);
353}
354
355size_t machines__fprintf_dsos_buildid(struct machines *machines, FILE *fp,
356 bool (skip)(struct dso *dso, int parm), int parm)
357{
358 struct rb_node *nd;
359 size_t ret = machine__fprintf_dsos_buildid(&machines->host, fp, skip, parm);
360
361 for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) {
362 struct machine *pos = rb_entry(nd, struct machine, rb_node);
363 ret += machine__fprintf_dsos_buildid(pos, fp, skip, parm);
364 }
365 return ret;
366}
367
368size_t machine__fprintf_vmlinux_path(struct machine *machine, FILE *fp)
369{
370 int i;
371 size_t printed = 0;
372 struct dso *kdso = machine->vmlinux_maps[MAP__FUNCTION]->dso;
373
374 if (kdso->has_build_id) {
375 char filename[PATH_MAX];
376 if (dso__build_id_filename(kdso, filename, sizeof(filename)))
377 printed += fprintf(fp, "[0] %s\n", filename);
378 }
379
380 for (i = 0; i < vmlinux_path__nr_entries; ++i)
381 printed += fprintf(fp, "[%d] %s\n",
382 i + kdso->has_build_id, vmlinux_path[i]);
383
384 return printed;
385}
386
387size_t machine__fprintf(struct machine *machine, FILE *fp)
388{
389 size_t ret = 0;
390 struct rb_node *nd;
391
392 for (nd = rb_first(&machine->threads); nd; nd = rb_next(nd)) {
393 struct thread *pos = rb_entry(nd, struct thread, rb_node);
394
395 ret += thread__fprintf(pos, fp);
396 }
397
398 return ret;
399}
400
401static struct dso *machine__get_kernel(struct machine *machine)
402{
403 const char *vmlinux_name = NULL;
404 struct dso *kernel;
405
406 if (machine__is_host(machine)) {
407 vmlinux_name = symbol_conf.vmlinux_name;
408 if (!vmlinux_name)
409 vmlinux_name = "[kernel.kallsyms]";
410
411 kernel = dso__kernel_findnew(machine, vmlinux_name,
412 "[kernel]",
413 DSO_TYPE_KERNEL);
414 } else {
415 char bf[PATH_MAX];
416
417 if (machine__is_default_guest(machine))
418 vmlinux_name = symbol_conf.default_guest_vmlinux_name;
419 if (!vmlinux_name)
420 vmlinux_name = machine__mmap_name(machine, bf,
421 sizeof(bf));
422
423 kernel = dso__kernel_findnew(machine, vmlinux_name,
424 "[guest.kernel]",
425 DSO_TYPE_GUEST_KERNEL);
426 }
427
428 if (kernel != NULL && (!kernel->has_build_id))
429 dso__read_running_kernel_build_id(kernel, machine);
430
431 return kernel;
432}
433
434struct process_args {
435 u64 start;
436};
437
438static int symbol__in_kernel(void *arg, const char *name,
439 char type __maybe_unused, u64 start)
440{
441 struct process_args *args = arg;
442
443 if (strchr(name, '['))
444 return 0;
445
446 args->start = start;
447 return 1;
448}
449
450
451static u64 machine__get_kernel_start_addr(struct machine *machine)
452{
453 const char *filename;
454 char path[PATH_MAX];
455 struct process_args args;
456
457 if (machine__is_host(machine)) {
458 filename = "/proc/kallsyms";
459 } else {
460 if (machine__is_default_guest(machine))
461 filename = (char *)symbol_conf.default_guest_kallsyms;
462 else {
463 sprintf(path, "%s/proc/kallsyms", machine->root_dir);
464 filename = path;
465 }
466 }
467
468 if (symbol__restricted_filename(filename, "/proc/kallsyms"))
469 return 0;
470
471 if (kallsyms__parse(filename, &args, symbol__in_kernel) <= 0)
472 return 0;
473
474 return args.start;
475}
476
477int __machine__create_kernel_maps(struct machine *machine, struct dso *kernel)
478{
479 enum map_type type;
480 u64 start = machine__get_kernel_start_addr(machine);
481
482 for (type = 0; type < MAP__NR_TYPES; ++type) {
483 struct kmap *kmap;
484
485 machine->vmlinux_maps[type] = map__new2(start, kernel, type);
486 if (machine->vmlinux_maps[type] == NULL)
487 return -1;
488
489 machine->vmlinux_maps[type]->map_ip =
490 machine->vmlinux_maps[type]->unmap_ip =
491 identity__map_ip;
492 kmap = map__kmap(machine->vmlinux_maps[type]);
493 kmap->kmaps = &machine->kmaps;
494 map_groups__insert(&machine->kmaps,
495 machine->vmlinux_maps[type]);
496 }
497
498 return 0;
499}
500
501void machine__destroy_kernel_maps(struct machine *machine)
502{
503 enum map_type type;
504
505 for (type = 0; type < MAP__NR_TYPES; ++type) {
506 struct kmap *kmap;
507
508 if (machine->vmlinux_maps[type] == NULL)
509 continue;
510
511 kmap = map__kmap(machine->vmlinux_maps[type]);
512 map_groups__remove(&machine->kmaps,
513 machine->vmlinux_maps[type]);
514 if (kmap->ref_reloc_sym) {
515
516
517
518
519 if (type == MAP__FUNCTION) {
520 free((char *)kmap->ref_reloc_sym->name);
521 kmap->ref_reloc_sym->name = NULL;
522 free(kmap->ref_reloc_sym);
523 }
524 kmap->ref_reloc_sym = NULL;
525 }
526
527 map__delete(machine->vmlinux_maps[type]);
528 machine->vmlinux_maps[type] = NULL;
529 }
530}
531
532int machines__create_guest_kernel_maps(struct machines *machines)
533{
534 int ret = 0;
535 struct dirent **namelist = NULL;
536 int i, items = 0;
537 char path[PATH_MAX];
538 pid_t pid;
539 char *endp;
540
541 if (symbol_conf.default_guest_vmlinux_name ||
542 symbol_conf.default_guest_modules ||
543 symbol_conf.default_guest_kallsyms) {
544 machines__create_kernel_maps(machines, DEFAULT_GUEST_KERNEL_ID);
545 }
546
547 if (symbol_conf.guestmount) {
548 items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL);
549 if (items <= 0)
550 return -ENOENT;
551 for (i = 0; i < items; i++) {
552 if (!isdigit(namelist[i]->d_name[0])) {
553
554 continue;
555 }
556 pid = (pid_t)strtol(namelist[i]->d_name, &endp, 10);
557 if ((*endp != '\0') ||
558 (endp == namelist[i]->d_name) ||
559 (errno == ERANGE)) {
560 pr_debug("invalid directory (%s). Skipping.\n",
561 namelist[i]->d_name);
562 continue;
563 }
564 sprintf(path, "%s/%s/proc/kallsyms",
565 symbol_conf.guestmount,
566 namelist[i]->d_name);
567 ret = access(path, R_OK);
568 if (ret) {
569 pr_debug("Can't access file %s\n", path);
570 goto failure;
571 }
572 machines__create_kernel_maps(machines, pid);
573 }
574failure:
575 free(namelist);
576 }
577
578 return ret;
579}
580
581void machines__destroy_kernel_maps(struct machines *machines)
582{
583 struct rb_node *next = rb_first(&machines->guests);
584
585 machine__destroy_kernel_maps(&machines->host);
586
587 while (next) {
588 struct machine *pos = rb_entry(next, struct machine, rb_node);
589
590 next = rb_next(&pos->rb_node);
591 rb_erase(&pos->rb_node, &machines->guests);
592 machine__delete(pos);
593 }
594}
595
596int machines__create_kernel_maps(struct machines *machines, pid_t pid)
597{
598 struct machine *machine = machines__findnew(machines, pid);
599
600 if (machine == NULL)
601 return -1;
602
603 return machine__create_kernel_maps(machine);
604}
605
606int machine__load_kallsyms(struct machine *machine, const char *filename,
607 enum map_type type, symbol_filter_t filter)
608{
609 struct map *map = machine->vmlinux_maps[type];
610 int ret = dso__load_kallsyms(map->dso, filename, map, filter);
611
612 if (ret > 0) {
613 dso__set_loaded(map->dso, type);
614
615
616
617
618
619 __map_groups__fixup_end(&machine->kmaps, type);
620 }
621
622 return ret;
623}
624
625int machine__load_vmlinux_path(struct machine *machine, enum map_type type,
626 symbol_filter_t filter)
627{
628 struct map *map = machine->vmlinux_maps[type];
629 int ret = dso__load_vmlinux_path(map->dso, map, filter);
630
631 if (ret > 0) {
632 dso__set_loaded(map->dso, type);
633 map__reloc_vmlinux(map);
634 }
635
636 return ret;
637}
638
639static void map_groups__fixup_end(struct map_groups *mg)
640{
641 int i;
642 for (i = 0; i < MAP__NR_TYPES; ++i)
643 __map_groups__fixup_end(mg, i);
644}
645
646static char *get_kernel_version(const char *root_dir)
647{
648 char version[PATH_MAX];
649 FILE *file;
650 char *name, *tmp;
651 const char *prefix = "Linux version ";
652
653 sprintf(version, "%s/proc/version", root_dir);
654 file = fopen(version, "r");
655 if (!file)
656 return NULL;
657
658 version[0] = '\0';
659 tmp = fgets(version, sizeof(version), file);
660 fclose(file);
661
662 name = strstr(version, prefix);
663 if (!name)
664 return NULL;
665 name += strlen(prefix);
666 tmp = strchr(name, ' ');
667 if (tmp)
668 *tmp = '\0';
669
670 return strdup(name);
671}
672
673static int map_groups__set_modules_path_dir(struct map_groups *mg,
674 const char *dir_name)
675{
676 struct dirent *dent;
677 DIR *dir = opendir(dir_name);
678 int ret = 0;
679
680 if (!dir) {
681 pr_debug("%s: cannot open %s dir\n", __func__, dir_name);
682 return -1;
683 }
684
685 while ((dent = readdir(dir)) != NULL) {
686 char path[PATH_MAX];
687 struct stat st;
688
689
690 snprintf(path, sizeof(path), "%s/%s", dir_name, dent->d_name);
691 if (stat(path, &st))
692 continue;
693
694 if (S_ISDIR(st.st_mode)) {
695 if (!strcmp(dent->d_name, ".") ||
696 !strcmp(dent->d_name, ".."))
697 continue;
698
699 ret = map_groups__set_modules_path_dir(mg, path);
700 if (ret < 0)
701 goto out;
702 } else {
703 char *dot = strrchr(dent->d_name, '.'),
704 dso_name[PATH_MAX];
705 struct map *map;
706 char *long_name;
707
708 if (dot == NULL || strcmp(dot, ".ko"))
709 continue;
710 snprintf(dso_name, sizeof(dso_name), "[%.*s]",
711 (int)(dot - dent->d_name), dent->d_name);
712
713 strxfrchar(dso_name, '-', '_');
714 map = map_groups__find_by_name(mg, MAP__FUNCTION,
715 dso_name);
716 if (map == NULL)
717 continue;
718
719 long_name = strdup(path);
720 if (long_name == NULL) {
721 ret = -1;
722 goto out;
723 }
724 dso__set_long_name(map->dso, long_name);
725 map->dso->lname_alloc = 1;
726 dso__kernel_module_get_build_id(map->dso, "");
727 }
728 }
729
730out:
731 closedir(dir);
732 return ret;
733}
734
735static int machine__set_modules_path(struct machine *machine)
736{
737 char *version;
738 char modules_path[PATH_MAX];
739
740 version = get_kernel_version(machine->root_dir);
741 if (!version)
742 return -1;
743
744 snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s/kernel",
745 machine->root_dir, version);
746 free(version);
747
748 return map_groups__set_modules_path_dir(&machine->kmaps, modules_path);
749}
750
751static int machine__create_modules(struct machine *machine)
752{
753 char *line = NULL;
754 size_t n;
755 FILE *file;
756 struct map *map;
757 const char *modules;
758 char path[PATH_MAX];
759
760 if (machine__is_default_guest(machine))
761 modules = symbol_conf.default_guest_modules;
762 else {
763 sprintf(path, "%s/proc/modules", machine->root_dir);
764 modules = path;
765 }
766
767 if (symbol__restricted_filename(path, "/proc/modules"))
768 return -1;
769
770 file = fopen(modules, "r");
771 if (file == NULL)
772 return -1;
773
774 while (!feof(file)) {
775 char name[PATH_MAX];
776 u64 start;
777 char *sep;
778 int line_len;
779
780 line_len = getline(&line, &n, file);
781 if (line_len < 0)
782 break;
783
784 if (!line)
785 goto out_failure;
786
787 line[--line_len] = '\0';
788
789 sep = strrchr(line, 'x');
790 if (sep == NULL)
791 continue;
792
793 hex2u64(sep + 1, &start);
794
795 sep = strchr(line, ' ');
796 if (sep == NULL)
797 continue;
798
799 *sep = '\0';
800
801 snprintf(name, sizeof(name), "[%s]", line);
802 map = machine__new_module(machine, start, name);
803 if (map == NULL)
804 goto out_delete_line;
805 dso__kernel_module_get_build_id(map->dso, machine->root_dir);
806 }
807
808 free(line);
809 fclose(file);
810
811 return machine__set_modules_path(machine);
812
813out_delete_line:
814 free(line);
815out_failure:
816 return -1;
817}
818
819int machine__create_kernel_maps(struct machine *machine)
820{
821 struct dso *kernel = machine__get_kernel(machine);
822
823 if (kernel == NULL ||
824 __machine__create_kernel_maps(machine, kernel) < 0)
825 return -1;
826
827 if (symbol_conf.use_modules && machine__create_modules(machine) < 0) {
828 if (machine__is_host(machine))
829 pr_debug("Problems creating module maps, "
830 "continuing anyway...\n");
831 else
832 pr_debug("Problems creating module maps for guest %d, "
833 "continuing anyway...\n", machine->pid);
834 }
835
836
837
838
839 map_groups__fixup_end(&machine->kmaps);
840 return 0;
841}
842
843static void machine__set_kernel_mmap_len(struct machine *machine,
844 union perf_event *event)
845{
846 int i;
847
848 for (i = 0; i < MAP__NR_TYPES; i++) {
849 machine->vmlinux_maps[i]->start = event->mmap.start;
850 machine->vmlinux_maps[i]->end = (event->mmap.start +
851 event->mmap.len);
852
853
854
855
856 if (machine->vmlinux_maps[i]->end == 0)
857 machine->vmlinux_maps[i]->end = ~0ULL;
858 }
859}
860
861static int machine__process_kernel_mmap_event(struct machine *machine,
862 union perf_event *event)
863{
864 struct map *map;
865 char kmmap_prefix[PATH_MAX];
866 enum dso_kernel_type kernel_type;
867 bool is_kernel_mmap;
868
869 machine__mmap_name(machine, kmmap_prefix, sizeof(kmmap_prefix));
870 if (machine__is_host(machine))
871 kernel_type = DSO_TYPE_KERNEL;
872 else
873 kernel_type = DSO_TYPE_GUEST_KERNEL;
874
875 is_kernel_mmap = memcmp(event->mmap.filename,
876 kmmap_prefix,
877 strlen(kmmap_prefix) - 1) == 0;
878 if (event->mmap.filename[0] == '/' ||
879 (!is_kernel_mmap && event->mmap.filename[0] == '[')) {
880
881 char short_module_name[1024];
882 char *name, *dot;
883
884 if (event->mmap.filename[0] == '/') {
885 name = strrchr(event->mmap.filename, '/');
886 if (name == NULL)
887 goto out_problem;
888
889 ++name;
890 dot = strrchr(name, '.');
891 if (dot == NULL)
892 goto out_problem;
893 snprintf(short_module_name, sizeof(short_module_name),
894 "[%.*s]", (int)(dot - name), name);
895 strxfrchar(short_module_name, '-', '_');
896 } else
897 strcpy(short_module_name, event->mmap.filename);
898
899 map = machine__new_module(machine, event->mmap.start,
900 event->mmap.filename);
901 if (map == NULL)
902 goto out_problem;
903
904 name = strdup(short_module_name);
905 if (name == NULL)
906 goto out_problem;
907
908 map->dso->short_name = name;
909 map->dso->sname_alloc = 1;
910 map->end = map->start + event->mmap.len;
911 } else if (is_kernel_mmap) {
912 const char *symbol_name = (event->mmap.filename +
913 strlen(kmmap_prefix));
914
915
916
917
918 struct dso *kernel = __dsos__findnew(&machine->kernel_dsos,
919 kmmap_prefix);
920 if (kernel == NULL)
921 goto out_problem;
922
923 kernel->kernel = kernel_type;
924 if (__machine__create_kernel_maps(machine, kernel) < 0)
925 goto out_problem;
926
927 machine__set_kernel_mmap_len(machine, event);
928
929
930
931
932
933
934 if (event->mmap.pgoff != 0) {
935 maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps,
936 symbol_name,
937 event->mmap.pgoff);
938 }
939
940 if (machine__is_default_guest(machine)) {
941
942
943
944 dso__load(kernel, machine->vmlinux_maps[MAP__FUNCTION],
945 NULL);
946 }
947 }
948 return 0;
949out_problem:
950 return -1;
951}
952
953int machine__process_mmap_event(struct machine *machine, union perf_event *event)
954{
955 u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
956 struct thread *thread;
957 struct map *map;
958 enum map_type type;
959 int ret = 0;
960
961 if (dump_trace)
962 perf_event__fprintf_mmap(event, stdout);
963
964 if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL ||
965 cpumode == PERF_RECORD_MISC_KERNEL) {
966 ret = machine__process_kernel_mmap_event(machine, event);
967 if (ret < 0)
968 goto out_problem;
969 return 0;
970 }
971
972 thread = machine__findnew_thread(machine, event->mmap.pid);
973 if (thread == NULL)
974 goto out_problem;
975
976 if (event->header.misc & PERF_RECORD_MISC_MMAP_DATA)
977 type = MAP__VARIABLE;
978 else
979 type = MAP__FUNCTION;
980
981 map = map__new(&machine->user_dsos, event->mmap.start,
982 event->mmap.len, event->mmap.pgoff,
983 event->mmap.pid, event->mmap.filename,
984 type);
985
986 if (map == NULL)
987 goto out_problem;
988
989 thread__insert_map(thread, map);
990 return 0;
991
992out_problem:
993 dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n");
994 return 0;
995}
996
997int machine__process_fork_event(struct machine *machine, union perf_event *event)
998{
999 struct thread *thread = machine__findnew_thread(machine, event->fork.tid);
1000 struct thread *parent = machine__findnew_thread(machine, event->fork.ptid);
1001
1002 if (dump_trace)
1003 perf_event__fprintf_task(event, stdout);
1004
1005 if (thread == NULL || parent == NULL ||
1006 thread__fork(thread, parent) < 0) {
1007 dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n");
1008 return -1;
1009 }
1010
1011 return 0;
1012}
1013
1014static void machine__remove_thread(struct machine *machine, struct thread *th)
1015{
1016 machine->last_match = NULL;
1017 rb_erase(&th->rb_node, &machine->threads);
1018
1019
1020
1021
1022 list_add_tail(&th->node, &machine->dead_threads);
1023}
1024
1025int machine__process_exit_event(struct machine *machine, union perf_event *event)
1026{
1027 struct thread *thread = machine__find_thread(machine, event->fork.tid);
1028
1029 if (dump_trace)
1030 perf_event__fprintf_task(event, stdout);
1031
1032 if (thread != NULL)
1033 machine__remove_thread(machine, thread);
1034
1035 return 0;
1036}
1037
1038int machine__process_event(struct machine *machine, union perf_event *event)
1039{
1040 int ret;
1041
1042 switch (event->header.type) {
1043 case PERF_RECORD_COMM:
1044 ret = machine__process_comm_event(machine, event); break;
1045 case PERF_RECORD_MMAP:
1046 ret = machine__process_mmap_event(machine, event); break;
1047 case PERF_RECORD_FORK:
1048 ret = machine__process_fork_event(machine, event); break;
1049 case PERF_RECORD_EXIT:
1050 ret = machine__process_exit_event(machine, event); break;
1051 case PERF_RECORD_LOST:
1052 ret = machine__process_lost_event(machine, event); break;
1053 default:
1054 ret = -1;
1055 break;
1056 }
1057
1058 return ret;
1059}
1060
1061static bool symbol__match_parent_regex(struct symbol *sym)
1062{
1063 if (sym->name && !regexec(&parent_regex, sym->name, 0, NULL, 0))
1064 return 1;
1065
1066 return 0;
1067}
1068
1069static const u8 cpumodes[] = {
1070 PERF_RECORD_MISC_USER,
1071 PERF_RECORD_MISC_KERNEL,
1072 PERF_RECORD_MISC_GUEST_USER,
1073 PERF_RECORD_MISC_GUEST_KERNEL
1074};
1075#define NCPUMODES (sizeof(cpumodes)/sizeof(u8))
1076
1077static void ip__resolve_ams(struct machine *machine, struct thread *thread,
1078 struct addr_map_symbol *ams,
1079 u64 ip)
1080{
1081 struct addr_location al;
1082 size_t i;
1083 u8 m;
1084
1085 memset(&al, 0, sizeof(al));
1086
1087 for (i = 0; i < NCPUMODES; i++) {
1088 m = cpumodes[i];
1089
1090
1091
1092
1093
1094
1095
1096 thread__find_addr_location(thread, machine, m, MAP__FUNCTION,
1097 ip, &al, NULL);
1098 if (al.sym)
1099 goto found;
1100 }
1101found:
1102 ams->addr = ip;
1103 ams->al_addr = al.addr;
1104 ams->sym = al.sym;
1105 ams->map = al.map;
1106}
1107
1108static void ip__resolve_data(struct machine *machine, struct thread *thread,
1109 u8 m, struct addr_map_symbol *ams, u64 addr)
1110{
1111 struct addr_location al;
1112
1113 memset(&al, 0, sizeof(al));
1114
1115 thread__find_addr_location(thread, machine, m, MAP__VARIABLE, addr, &al,
1116 NULL);
1117 ams->addr = addr;
1118 ams->al_addr = al.addr;
1119 ams->sym = al.sym;
1120 ams->map = al.map;
1121}
1122
1123struct mem_info *machine__resolve_mem(struct machine *machine,
1124 struct thread *thr,
1125 struct perf_sample *sample,
1126 u8 cpumode)
1127{
1128 struct mem_info *mi = zalloc(sizeof(*mi));
1129
1130 if (!mi)
1131 return NULL;
1132
1133 ip__resolve_ams(machine, thr, &mi->iaddr, sample->ip);
1134 ip__resolve_data(machine, thr, cpumode, &mi->daddr, sample->addr);
1135 mi->data_src.val = sample->data_src;
1136
1137 return mi;
1138}
1139
1140struct branch_info *machine__resolve_bstack(struct machine *machine,
1141 struct thread *thr,
1142 struct branch_stack *bs)
1143{
1144 struct branch_info *bi;
1145 unsigned int i;
1146
1147 bi = calloc(bs->nr, sizeof(struct branch_info));
1148 if (!bi)
1149 return NULL;
1150
1151 for (i = 0; i < bs->nr; i++) {
1152 ip__resolve_ams(machine, thr, &bi[i].to, bs->entries[i].to);
1153 ip__resolve_ams(machine, thr, &bi[i].from, bs->entries[i].from);
1154 bi[i].flags = bs->entries[i].flags;
1155 }
1156 return bi;
1157}
1158
1159static int machine__resolve_callchain_sample(struct machine *machine,
1160 struct thread *thread,
1161 struct ip_callchain *chain,
1162 struct symbol **parent)
1163
1164{
1165 u8 cpumode = PERF_RECORD_MISC_USER;
1166 unsigned int i;
1167 int err;
1168
1169 callchain_cursor_reset(&callchain_cursor);
1170
1171 if (chain->nr > PERF_MAX_STACK_DEPTH) {
1172 pr_warning("corrupted callchain. skipping...\n");
1173 return 0;
1174 }
1175
1176 for (i = 0; i < chain->nr; i++) {
1177 u64 ip;
1178 struct addr_location al;
1179
1180 if (callchain_param.order == ORDER_CALLEE)
1181 ip = chain->ips[i];
1182 else
1183 ip = chain->ips[chain->nr - i - 1];
1184
1185 if (ip >= PERF_CONTEXT_MAX) {
1186 switch (ip) {
1187 case PERF_CONTEXT_HV:
1188 cpumode = PERF_RECORD_MISC_HYPERVISOR;
1189 break;
1190 case PERF_CONTEXT_KERNEL:
1191 cpumode = PERF_RECORD_MISC_KERNEL;
1192 break;
1193 case PERF_CONTEXT_USER:
1194 cpumode = PERF_RECORD_MISC_USER;
1195 break;
1196 default:
1197 pr_debug("invalid callchain context: "
1198 "%"PRId64"\n", (s64) ip);
1199
1200
1201
1202
1203 callchain_cursor_reset(&callchain_cursor);
1204 return 0;
1205 }
1206 continue;
1207 }
1208
1209 al.filtered = false;
1210 thread__find_addr_location(thread, machine, cpumode,
1211 MAP__FUNCTION, ip, &al, NULL);
1212 if (al.sym != NULL) {
1213 if (sort__has_parent && !*parent &&
1214 symbol__match_parent_regex(al.sym))
1215 *parent = al.sym;
1216 if (!symbol_conf.use_callchain)
1217 break;
1218 }
1219
1220 err = callchain_cursor_append(&callchain_cursor,
1221 ip, al.map, al.sym);
1222 if (err)
1223 return err;
1224 }
1225
1226 return 0;
1227}
1228
1229static int unwind_entry(struct unwind_entry *entry, void *arg)
1230{
1231 struct callchain_cursor *cursor = arg;
1232 return callchain_cursor_append(cursor, entry->ip,
1233 entry->map, entry->sym);
1234}
1235
1236int machine__resolve_callchain(struct machine *machine,
1237 struct perf_evsel *evsel,
1238 struct thread *thread,
1239 struct perf_sample *sample,
1240 struct symbol **parent)
1241
1242{
1243 int ret;
1244
1245 callchain_cursor_reset(&callchain_cursor);
1246
1247 ret = machine__resolve_callchain_sample(machine, thread,
1248 sample->callchain, parent);
1249 if (ret)
1250 return ret;
1251
1252
1253 if (!((evsel->attr.sample_type & PERF_SAMPLE_REGS_USER) &&
1254 (evsel->attr.sample_type & PERF_SAMPLE_STACK_USER)))
1255 return 0;
1256
1257
1258 if ((!sample->user_regs.regs) ||
1259 (!sample->user_stack.size))
1260 return 0;
1261
1262 return unwind__get_entries(unwind_entry, &callchain_cursor, machine,
1263 thread, evsel->attr.sample_regs_user,
1264 sample);
1265
1266}
1267
