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-rw-r--r--tools/perf/util/machine.c784
1 files changed, 773 insertions, 11 deletions
diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index 1f09d0581e6b..efdb38e65a92 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -1,10 +1,15 @@
1#include "callchain.h"
1#include "debug.h" 2#include "debug.h"
2#include "event.h" 3#include "event.h"
4#include "evsel.h"
5#include "hist.h"
3#include "machine.h" 6#include "machine.h"
4#include "map.h" 7#include "map.h"
8#include "sort.h"
5#include "strlist.h" 9#include "strlist.h"
6#include "thread.h" 10#include "thread.h"
7#include <stdbool.h> 11#include <stdbool.h>
12#include "unwind.h"
8 13
9int machine__init(struct machine *machine, const char *root_dir, pid_t pid) 14int machine__init(struct machine *machine, const char *root_dir, pid_t pid)
10{ 15{
@@ -48,6 +53,29 @@ static void dsos__delete(struct list_head *dsos)
48 } 53 }
49} 54}
50 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
51void machine__exit(struct machine *machine) 79void machine__exit(struct machine *machine)
52{ 80{
53 map_groups__exit(&machine->kmaps); 81 map_groups__exit(&machine->kmaps);
@@ -63,10 +91,22 @@ void machine__delete(struct machine *machine)
63 free(machine); 91 free(machine);
64} 92}
65 93
66struct machine *machines__add(struct rb_root *machines, pid_t pid, 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 /* XXX exit guest */
104}
105
106struct machine *machines__add(struct machines *machines, pid_t pid,
67 const char *root_dir) 107 const char *root_dir)
68{ 108{
69 struct rb_node **p = &machines->rb_node; 109 struct rb_node **p = &machines->guests.rb_node;
70 struct rb_node *parent = NULL; 110 struct rb_node *parent = NULL;
71 struct machine *pos, *machine = malloc(sizeof(*machine)); 111 struct machine *pos, *machine = malloc(sizeof(*machine));
72 112
@@ -88,18 +128,21 @@ struct machine *machines__add(struct rb_root *machines, pid_t pid,
88 } 128 }
89 129
90 rb_link_node(&machine->rb_node, parent, p); 130 rb_link_node(&machine->rb_node, parent, p);
91 rb_insert_color(&machine->rb_node, machines); 131 rb_insert_color(&machine->rb_node, &machines->guests);
92 132
93 return machine; 133 return machine;
94} 134}
95 135
96struct machine *machines__find(struct rb_root *machines, pid_t pid) 136struct machine *machines__find(struct machines *machines, pid_t pid)
97{ 137{
98 struct rb_node **p = &machines->rb_node; 138 struct rb_node **p = &machines->guests.rb_node;
99 struct rb_node *parent = NULL; 139 struct rb_node *parent = NULL;
100 struct machine *machine; 140 struct machine *machine;
101 struct machine *default_machine = NULL; 141 struct machine *default_machine = NULL;
102 142
143 if (pid == HOST_KERNEL_ID)
144 return &machines->host;
145
103 while (*p != NULL) { 146 while (*p != NULL) {
104 parent = *p; 147 parent = *p;
105 machine = rb_entry(parent, struct machine, rb_node); 148 machine = rb_entry(parent, struct machine, rb_node);
@@ -116,7 +159,7 @@ struct machine *machines__find(struct rb_root *machines, pid_t pid)
116 return default_machine; 159 return default_machine;
117} 160}
118 161
119struct machine *machines__findnew(struct rb_root *machines, pid_t pid) 162struct machine *machines__findnew(struct machines *machines, pid_t pid)
120{ 163{
121 char path[PATH_MAX]; 164 char path[PATH_MAX];
122 const char *root_dir = ""; 165 const char *root_dir = "";
@@ -150,12 +193,12 @@ out:
150 return machine; 193 return machine;
151} 194}
152 195
153void machines__process(struct rb_root *machines, 196void machines__process_guests(struct machines *machines,
154 machine__process_t process, void *data) 197 machine__process_t process, void *data)
155{ 198{
156 struct rb_node *nd; 199 struct rb_node *nd;
157 200
158 for (nd = rb_first(machines); nd; nd = rb_next(nd)) { 201 for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) {
159 struct machine *pos = rb_entry(nd, struct machine, rb_node); 202 struct machine *pos = rb_entry(nd, struct machine, rb_node);
160 process(pos, data); 203 process(pos, data);
161 } 204 }
@@ -175,12 +218,14 @@ char *machine__mmap_name(struct machine *machine, char *bf, size_t size)
175 return bf; 218 return bf;
176} 219}
177 220
178void machines__set_id_hdr_size(struct rb_root *machines, u16 id_hdr_size) 221void machines__set_id_hdr_size(struct machines *machines, u16 id_hdr_size)
179{ 222{
180 struct rb_node *node; 223 struct rb_node *node;
181 struct machine *machine; 224 struct machine *machine;
182 225
183 for (node = rb_first(machines); node; node = rb_next(node)) { 226 machines->host.id_hdr_size = id_hdr_size;
227
228 for (node = rb_first(&machines->guests); node; node = rb_next(node)) {
184 machine = rb_entry(node, struct machine, rb_node); 229 machine = rb_entry(node, struct machine, rb_node);
185 machine->id_hdr_size = id_hdr_size; 230 machine->id_hdr_size = id_hdr_size;
186 } 231 }
@@ -264,6 +309,537 @@ int machine__process_lost_event(struct machine *machine __maybe_unused,
264 return 0; 309 return 0;
265} 310}
266 311
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/* Figure out the start address of kernel map from /proc/kallsyms */
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 * ref_reloc_sym is shared among all maps, so free just
517 * on one of them.
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 /* Filter out . and .. */
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 * Since /proc/kallsyms will have multiple sessions for the
616 * kernel, with modules between them, fixup the end of all
617 * sections.
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 /*sshfs might return bad dent->d_type, so we have to stat*/
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'; /* \n */
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 * Now that we have all the maps created, just set the ->end of them:
838 */
839 map_groups__fixup_end(&machine->kmaps);
840 return 0;
841}
842
267static void machine__set_kernel_mmap_len(struct machine *machine, 843static void machine__set_kernel_mmap_len(struct machine *machine,
268 union perf_event *event) 844 union perf_event *event)
269{ 845{
@@ -462,3 +1038,189 @@ int machine__process_event(struct machine *machine, union perf_event *event)
462 1038
463 return ret; 1039 return ret;
464} 1040}
1041
1042void machine__remove_thread(struct machine *machine, struct thread *th)
1043{
1044 machine->last_match = NULL;
1045 rb_erase(&th->rb_node, &machine->threads);
1046 /*
1047 * We may have references to this thread, for instance in some hist_entry
1048 * instances, so just move them to a separate list.
1049 */
1050 list_add_tail(&th->node, &machine->dead_threads);
1051}
1052
1053static bool symbol__match_parent_regex(struct symbol *sym)
1054{
1055 if (sym->name && !regexec(&parent_regex, sym->name, 0, NULL, 0))
1056 return 1;
1057
1058 return 0;
1059}
1060
1061static const u8 cpumodes[] = {
1062 PERF_RECORD_MISC_USER,
1063 PERF_RECORD_MISC_KERNEL,
1064 PERF_RECORD_MISC_GUEST_USER,
1065 PERF_RECORD_MISC_GUEST_KERNEL
1066};
1067#define NCPUMODES (sizeof(cpumodes)/sizeof(u8))
1068
1069static void ip__resolve_ams(struct machine *machine, struct thread *thread,
1070 struct addr_map_symbol *ams,
1071 u64 ip)
1072{
1073 struct addr_location al;
1074 size_t i;
1075 u8 m;
1076
1077 memset(&al, 0, sizeof(al));
1078
1079 for (i = 0; i < NCPUMODES; i++) {
1080 m = cpumodes[i];
1081 /*
1082 * We cannot use the header.misc hint to determine whether a
1083 * branch stack address is user, kernel, guest, hypervisor.
1084 * Branches may straddle the kernel/user/hypervisor boundaries.
1085 * Thus, we have to try consecutively until we find a match
1086 * or else, the symbol is unknown
1087 */
1088 thread__find_addr_location(thread, machine, m, MAP__FUNCTION,
1089 ip, &al, NULL);
1090 if (al.sym)
1091 goto found;
1092 }
1093found:
1094 ams->addr = ip;
1095 ams->al_addr = al.addr;
1096 ams->sym = al.sym;
1097 ams->map = al.map;
1098}
1099
1100struct branch_info *machine__resolve_bstack(struct machine *machine,
1101 struct thread *thr,
1102 struct branch_stack *bs)
1103{
1104 struct branch_info *bi;
1105 unsigned int i;
1106
1107 bi = calloc(bs->nr, sizeof(struct branch_info));
1108 if (!bi)
1109 return NULL;
1110
1111 for (i = 0; i < bs->nr; i++) {
1112 ip__resolve_ams(machine, thr, &bi[i].to, bs->entries[i].to);
1113 ip__resolve_ams(machine, thr, &bi[i].from, bs->entries[i].from);
1114 bi[i].flags = bs->entries[i].flags;
1115 }
1116 return bi;
1117}
1118
1119static int machine__resolve_callchain_sample(struct machine *machine,
1120 struct thread *thread,
1121 struct ip_callchain *chain,
1122 struct symbol **parent)
1123
1124{
1125 u8 cpumode = PERF_RECORD_MISC_USER;
1126 unsigned int i;
1127 int err;
1128
1129 callchain_cursor_reset(&callchain_cursor);
1130
1131 if (chain->nr > PERF_MAX_STACK_DEPTH) {
1132 pr_warning("corrupted callchain. skipping...\n");
1133 return 0;
1134 }
1135
1136 for (i = 0; i < chain->nr; i++) {
1137 u64 ip;
1138 struct addr_location al;
1139
1140 if (callchain_param.order == ORDER_CALLEE)
1141 ip = chain->ips[i];
1142 else
1143 ip = chain->ips[chain->nr - i - 1];
1144
1145 if (ip >= PERF_CONTEXT_MAX) {
1146 switch (ip) {
1147 case PERF_CONTEXT_HV:
1148 cpumode = PERF_RECORD_MISC_HYPERVISOR;
1149 break;
1150 case PERF_CONTEXT_KERNEL:
1151 cpumode = PERF_RECORD_MISC_KERNEL;
1152 break;
1153 case PERF_CONTEXT_USER:
1154 cpumode = PERF_RECORD_MISC_USER;
1155 break;
1156 default:
1157 pr_debug("invalid callchain context: "
1158 "%"PRId64"\n", (s64) ip);
1159 /*
1160 * It seems the callchain is corrupted.
1161 * Discard all.
1162 */
1163 callchain_cursor_reset(&callchain_cursor);
1164 return 0;
1165 }
1166 continue;
1167 }
1168
1169 al.filtered = false;
1170 thread__find_addr_location(thread, machine, cpumode,
1171 MAP__FUNCTION, ip, &al, NULL);
1172 if (al.sym != NULL) {
1173 if (sort__has_parent && !*parent &&
1174 symbol__match_parent_regex(al.sym))
1175 *parent = al.sym;
1176 if (!symbol_conf.use_callchain)
1177 break;
1178 }
1179
1180 err = callchain_cursor_append(&callchain_cursor,
1181 ip, al.map, al.sym);
1182 if (err)
1183 return err;
1184 }
1185
1186 return 0;
1187}
1188
1189static int unwind_entry(struct unwind_entry *entry, void *arg)
1190{
1191 struct callchain_cursor *cursor = arg;
1192 return callchain_cursor_append(cursor, entry->ip,
1193 entry->map, entry->sym);
1194}
1195
1196int machine__resolve_callchain(struct machine *machine,
1197 struct perf_evsel *evsel,
1198 struct thread *thread,
1199 struct perf_sample *sample,
1200 struct symbol **parent)
1201
1202{
1203 int ret;
1204
1205 callchain_cursor_reset(&callchain_cursor);
1206
1207 ret = machine__resolve_callchain_sample(machine, thread,
1208 sample->callchain, parent);
1209 if (ret)
1210 return ret;
1211
1212 /* Can we do dwarf post unwind? */
1213 if (!((evsel->attr.sample_type & PERF_SAMPLE_REGS_USER) &&
1214 (evsel->attr.sample_type & PERF_SAMPLE_STACK_USER)))
1215 return 0;
1216
1217 /* Bail out if nothing was captured. */
1218 if ((!sample->user_regs.regs) ||
1219 (!sample->user_stack.size))
1220 return 0;
1221
1222 return unwind__get_entries(unwind_entry, &callchain_cursor, machine,
1223 thread, evsel->attr.sample_regs_user,
1224 sample);
1225
1226}
generated by cgit v1.2.2 (git 2.25.0) at 2025-02-07 17:35:44 -0500